Pub Date : 2023-10-18DOI: 10.1080/02726351.2023.2267492
Hang Jing, Xu Guo, Pengfei Yang
AbstractA discrete-continuous (PFC–FLAC) coupling method was used in this study to simulate laboratory triaxial tests with soybean granular material. The mesoscopic mechanical parameters of the soybean granular material were calibrated by comparing them with actual laboratory test results, and the validity of the modeling method was verified. Subsequently, the particle motion law and mechanical mechanism of the soybean granular materials were analyzed based on the particle displacement field, velocity field, and force chain network. The results showed that the coupled PFC–FLAC method could better describe the macroscopic stress–strain relationship, deformation damage characteristics, and shear strength mechanical indexes of soybean granular materials. With increasing confining pressure (50–200 kPa), the bulging deformation of the specimens changed from uniform to concentrated but uneven. The particle contact number and maximum particle contact stress increased by 19.3 and 48%, respectively. Additionally, variations of the macroscopic properties of the specimens with microscopic parameters were revealed. Under the same conditions, the change in the peak stress of the specimen was proportional to the interparticle friction coefficient. Moreover, the slope of the stress–strain curve increased gradually with an increase in the effective modulus.Keywords: Discrete element methodPFC–FLAC couplingsoybean granular materialtriaxial compressionnumerical simulation Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the [Training Program for Young Backbone Teachers in Higher Education Institutions in Henan Province] under Grant [Number 2020GGJS086]; and [Henan Province Higher Education Key Research Project Plan] under Grant [Number 23A560001].
{"title":"PFC–FLAC coupling-based numerical simulation of triaxial test on soybean granular material","authors":"Hang Jing, Xu Guo, Pengfei Yang","doi":"10.1080/02726351.2023.2267492","DOIUrl":"https://doi.org/10.1080/02726351.2023.2267492","url":null,"abstract":"AbstractA discrete-continuous (PFC–FLAC) coupling method was used in this study to simulate laboratory triaxial tests with soybean granular material. The mesoscopic mechanical parameters of the soybean granular material were calibrated by comparing them with actual laboratory test results, and the validity of the modeling method was verified. Subsequently, the particle motion law and mechanical mechanism of the soybean granular materials were analyzed based on the particle displacement field, velocity field, and force chain network. The results showed that the coupled PFC–FLAC method could better describe the macroscopic stress–strain relationship, deformation damage characteristics, and shear strength mechanical indexes of soybean granular materials. With increasing confining pressure (50–200 kPa), the bulging deformation of the specimens changed from uniform to concentrated but uneven. The particle contact number and maximum particle contact stress increased by 19.3 and 48%, respectively. Additionally, variations of the macroscopic properties of the specimens with microscopic parameters were revealed. Under the same conditions, the change in the peak stress of the specimen was proportional to the interparticle friction coefficient. Moreover, the slope of the stress–strain curve increased gradually with an increase in the effective modulus.Keywords: Discrete element methodPFC–FLAC couplingsoybean granular materialtriaxial compressionnumerical simulation Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the [Training Program for Young Backbone Teachers in Higher Education Institutions in Henan Province] under Grant [Number 2020GGJS086]; and [Henan Province Higher Education Key Research Project Plan] under Grant [Number 23A560001].","PeriodicalId":19742,"journal":{"name":"Particulate Science and Technology","volume":"17 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135824780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-16DOI: 10.1080/02726351.2023.2268574
Dan Wang, Cheng Wang, Zengqiang Chen, Chenlong Duan, Chenyang Zhou
AbstractGas–solid Fluidized bed technology has a pivotal role in coal separation. Bubble movement behavior is an important factor affecting the fluidization stability. Fluidized bed measurement is an essential link in the bubble behavior study. As the main evaluation parameters, the concentration distribution and density distribution can reflect the bubble movement behavior. This work uses a noninvasive method of electrical capacitance tomography (ECT) for fluidized bed measurements, combined with COMSOL simulation validation for real-time imaging of bubbles in Geldart Group B magnetite powder particles. Meanwhile, the most suitable reconstruction algorithm for gas–solid separation fluidized bed is selected from three image reconstruction algorithms. And then concentration distribution and density distribution are analyzed. The results show that under reasonable gas velocity conditions (U–Umf =2.28 and 3.17 cm/s), the central region ([0, 1/4]) concentrations of [0.43–0.45] and [0.39–0.42] and densities of [1.98–2.06 g/cm3] and [1.86–1.96 g/cm3] are obtained by ECT measurements, respectively. Finally, the bed density obtained from the ECT sensors in the experiment was validated using three different bed density models. The error can be controlled to within 20%, which indicates that the ECT measurement method has a fairly high reliability and accuracy in dry coal beneficiation field.Keywords: Gas–solid fluidized bedelectrical capacitance tomography (ECT)bubble movement behaviorbed density Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe research work is financially supported by China National Funds for Distinguished Young Scientists (52125403), Natural Science Foundation of Jiangsu Province (BK20200651), National Natural Science Foundation of China (52104276, 52261135540, 52220105008, 51974306), the Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX23_2815); the Graduate Innovation Program of China University of Mining and Technology (2023WLKXJ065), the Fundamental Research Funds for the Central Universities (2023XSCX020).
{"title":"Study on the relation of bubble behavior and bed density in gas–solid separation fluidized bed using electrical capacitance tomography","authors":"Dan Wang, Cheng Wang, Zengqiang Chen, Chenlong Duan, Chenyang Zhou","doi":"10.1080/02726351.2023.2268574","DOIUrl":"https://doi.org/10.1080/02726351.2023.2268574","url":null,"abstract":"AbstractGas–solid Fluidized bed technology has a pivotal role in coal separation. Bubble movement behavior is an important factor affecting the fluidization stability. Fluidized bed measurement is an essential link in the bubble behavior study. As the main evaluation parameters, the concentration distribution and density distribution can reflect the bubble movement behavior. This work uses a noninvasive method of electrical capacitance tomography (ECT) for fluidized bed measurements, combined with COMSOL simulation validation for real-time imaging of bubbles in Geldart Group B magnetite powder particles. Meanwhile, the most suitable reconstruction algorithm for gas–solid separation fluidized bed is selected from three image reconstruction algorithms. And then concentration distribution and density distribution are analyzed. The results show that under reasonable gas velocity conditions (U–Umf =2.28 and 3.17 cm/s), the central region ([0, 1/4]) concentrations of [0.43–0.45] and [0.39–0.42] and densities of [1.98–2.06 g/cm3] and [1.86–1.96 g/cm3] are obtained by ECT measurements, respectively. Finally, the bed density obtained from the ECT sensors in the experiment was validated using three different bed density models. The error can be controlled to within 20%, which indicates that the ECT measurement method has a fairly high reliability and accuracy in dry coal beneficiation field.Keywords: Gas–solid fluidized bedelectrical capacitance tomography (ECT)bubble movement behaviorbed density Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe research work is financially supported by China National Funds for Distinguished Young Scientists (52125403), Natural Science Foundation of Jiangsu Province (BK20200651), National Natural Science Foundation of China (52104276, 52261135540, 52220105008, 51974306), the Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX23_2815); the Graduate Innovation Program of China University of Mining and Technology (2023WLKXJ065), the Fundamental Research Funds for the Central Universities (2023XSCX020).","PeriodicalId":19742,"journal":{"name":"Particulate Science and Technology","volume":"225 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136079977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AbstractGlycan-immobilizing particles are useful for a wide variety of biomedical applications, such as the detection, separation, and purification of proteins, viruses, and bacteria, which can be specifically bound by the glycan moieties. One strategy for the quick and accurate detection of these components is to collect the particles magnetically after binding the components to the particle surface. We fabricated core–shell particles composed of a magnetic core and a thin polymer shell. The shell was incorporated with a fluorescent dye with glucose molecules immobilized on its surface. As the magnetic core, we selected Fe3O4 particles. Taking into consideration its low environmental impact, we adopted soap-free emulsion polymerization to form the polymer shell. Thus, methyl methacrylate was polymerized in the presence of Fe3O4 particles, octyl-β-d-glucopyranoside, and rhodamine B to generate a glucose-capped fluorescent PMMA thin shell on the Fe3O4 particles. The resulting particles exhibited a saturation magnetization of ∼53 emu/g. The novelty of this research is that glucose-immobilized polymer particles with excellent magnetic properties that can be collected in 5 s using a magnet can be synthesized with an environmentally friendly method.Keywords: Fe3O4glucosecore–shell particlesoap-free emulsion polymerization Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis research was supported by JSPS KAKENHI under Grant Number 21K04764, AMED under Grant Numbers JP21lm0203010 and JP22ym0126803, and an Ibaraki University Grant for Specially Promoted Research.
{"title":"Fabrication of glucose-immobilizing fluorescent polymer particles with high magnetic responsiveness","authors":"Noriko Yamauchi, Yosuke Noshiro, Shohei Tada, Keisuke Sato, Makoto Ogata, Yoshio Kobayashi","doi":"10.1080/02726351.2023.2263402","DOIUrl":"https://doi.org/10.1080/02726351.2023.2263402","url":null,"abstract":"AbstractGlycan-immobilizing particles are useful for a wide variety of biomedical applications, such as the detection, separation, and purification of proteins, viruses, and bacteria, which can be specifically bound by the glycan moieties. One strategy for the quick and accurate detection of these components is to collect the particles magnetically after binding the components to the particle surface. We fabricated core–shell particles composed of a magnetic core and a thin polymer shell. The shell was incorporated with a fluorescent dye with glucose molecules immobilized on its surface. As the magnetic core, we selected Fe3O4 particles. Taking into consideration its low environmental impact, we adopted soap-free emulsion polymerization to form the polymer shell. Thus, methyl methacrylate was polymerized in the presence of Fe3O4 particles, octyl-β-d-glucopyranoside, and rhodamine B to generate a glucose-capped fluorescent PMMA thin shell on the Fe3O4 particles. The resulting particles exhibited a saturation magnetization of ∼53 emu/g. The novelty of this research is that glucose-immobilized polymer particles with excellent magnetic properties that can be collected in 5 s using a magnet can be synthesized with an environmentally friendly method.Keywords: Fe3O4glucosecore–shell particlesoap-free emulsion polymerization Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis research was supported by JSPS KAKENHI under Grant Number 21K04764, AMED under Grant Numbers JP21lm0203010 and JP22ym0126803, and an Ibaraki University Grant for Specially Promoted Research.","PeriodicalId":19742,"journal":{"name":"Particulate Science and Technology","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134944578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-05DOI: 10.1080/02726351.2023.2263380
Enlin Long, Qingfa Chen, Jun Liu
AbstractThe essence of particle flow is the microscale breaking and rebuilding of force chains. Therefore, it is essential to conduct research on force chains during the process of particle flow. This study focuses on particle flow during the ore drawing process, develops a photoelastic experimental system for physical ore drawing, studies the macroscopic change characteristics of force chains, analyzes the statistical properties of force chain intensity, length, quantity, and azimuth, and discusses the particle blockage phenomenon and its engineering application in ore drawing. The results show that the length of the strong force chains is mostly about five particles, with fewer numbers, and their direction is primarily concentrated between 60° and 120°. Weak force chains are abundant and distributed uniformly in all directions. In addition, based on the arching and blocking characteristics of particles, a novel sealing method for the ore pass is proposed. The research results deepen the understanding of granular material flow hazards and provide a valuable reference for similar engineering analyses.Keywords: Ore drawingphotoelastic experimentparticle flowparticle blockageforce chain Authors’ contributionsEnlin Long: Conceptualization, Software, Formal analysis, Investigation, Data curation, Writing-original draft. Qingfa Chen: Resources, Funding acquisition, Supervision, Project administration, Writing-review & editing. Jun Liu: Writing-review & editing.Disclosure statementNo potential conflict of interest was reported by the author(s). The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.Additional informationFundingThis work was supported by the National Natural Science Foundation of China [grant number 51964003].
{"title":"Characteristics of force chains in the flow of photoelastic particles under a barrier","authors":"Enlin Long, Qingfa Chen, Jun Liu","doi":"10.1080/02726351.2023.2263380","DOIUrl":"https://doi.org/10.1080/02726351.2023.2263380","url":null,"abstract":"AbstractThe essence of particle flow is the microscale breaking and rebuilding of force chains. Therefore, it is essential to conduct research on force chains during the process of particle flow. This study focuses on particle flow during the ore drawing process, develops a photoelastic experimental system for physical ore drawing, studies the macroscopic change characteristics of force chains, analyzes the statistical properties of force chain intensity, length, quantity, and azimuth, and discusses the particle blockage phenomenon and its engineering application in ore drawing. The results show that the length of the strong force chains is mostly about five particles, with fewer numbers, and their direction is primarily concentrated between 60° and 120°. Weak force chains are abundant and distributed uniformly in all directions. In addition, based on the arching and blocking characteristics of particles, a novel sealing method for the ore pass is proposed. The research results deepen the understanding of granular material flow hazards and provide a valuable reference for similar engineering analyses.Keywords: Ore drawingphotoelastic experimentparticle flowparticle blockageforce chain Authors’ contributionsEnlin Long: Conceptualization, Software, Formal analysis, Investigation, Data curation, Writing-original draft. Qingfa Chen: Resources, Funding acquisition, Supervision, Project administration, Writing-review & editing. Jun Liu: Writing-review & editing.Disclosure statementNo potential conflict of interest was reported by the author(s). The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.Additional informationFundingThis work was supported by the National Natural Science Foundation of China [grant number 51964003].","PeriodicalId":19742,"journal":{"name":"Particulate Science and Technology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135482384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-05DOI: 10.1080/02726351.2023.2265313
Rachit Poddar, S. S. Mallick, Lal Kundan
AbstractSifting and fluidization segregation characteristics were determined for 6 different fly ash samples (particle size ‘d50’ ranging from 68 µm to 141 µm) using standard testers. The results have shown that the coarser particles have a greater tendency to sifting segregation, and the finer powders respond more to fluidization segregation. The angle of repose for the fine ash and coarse ash were 55° and 38°, respectively, which indicated poor to good flowability conditions. The flow function test shows that all the samples were in an easy-flowing to a free-flowing zone. The angle of repose and material flow function have provided a good correlation with the sifting segregation index. In contrast, cohesion between particles, the ratio of free terminal velocities and diameters for coarse to fine particles have shown a good fit with fluidization segregation indices. For both sifting and fluidization segregation, the model correlation values are 0.91 and 0.94, indicating the predicted results are a good fit to the experimental data.Keywords: Sifting and fluidization segregationsegregation indexangle of reposecohesionterminal settling velocity AcknowledgementThe authors acknowledge the collaboration between Thapar Institute of Engineering & Technology (TIET) and Granutools (Belgium) for using the GranuHeap instrument.Disclosure statementNo potential conflict of interest was reported by the author(s).
{"title":"An experimental investigation into sifting and fluidization segregation characteristics for coal fly ash","authors":"Rachit Poddar, S. S. Mallick, Lal Kundan","doi":"10.1080/02726351.2023.2265313","DOIUrl":"https://doi.org/10.1080/02726351.2023.2265313","url":null,"abstract":"AbstractSifting and fluidization segregation characteristics were determined for 6 different fly ash samples (particle size ‘d50’ ranging from 68 µm to 141 µm) using standard testers. The results have shown that the coarser particles have a greater tendency to sifting segregation, and the finer powders respond more to fluidization segregation. The angle of repose for the fine ash and coarse ash were 55° and 38°, respectively, which indicated poor to good flowability conditions. The flow function test shows that all the samples were in an easy-flowing to a free-flowing zone. The angle of repose and material flow function have provided a good correlation with the sifting segregation index. In contrast, cohesion between particles, the ratio of free terminal velocities and diameters for coarse to fine particles have shown a good fit with fluidization segregation indices. For both sifting and fluidization segregation, the model correlation values are 0.91 and 0.94, indicating the predicted results are a good fit to the experimental data.Keywords: Sifting and fluidization segregationsegregation indexangle of reposecohesionterminal settling velocity AcknowledgementThe authors acknowledge the collaboration between Thapar Institute of Engineering & Technology (TIET) and Granutools (Belgium) for using the GranuHeap instrument.Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":19742,"journal":{"name":"Particulate Science and Technology","volume":"447 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135482546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AbstractIn the last decade, there has been increasing scrutiny of using biochar to remove pollutants from the waste water. However, due to particle size of biochar and the difficulty of its separation after the adsorption process, the use of these adsorbents has always been a challenge, until magnetic biochar (MB) was proposed by researchers. The production of MB is divided into pre-pyrolysis and post- pyrolysis methods. The MB activation/modification methods included physical and chemical activation/ammonization, sulfurization, oxidation, polymerization and MB production without modification/activation was investigated. In this research, studies that produced MB as a one-step heating and post-pyrolysis method reviewed. The results showed that the capacity of different MB to remove lead, cadmium, chromium, copper, and arsenic was calculated to be 96.9, 91.2, 90.5, 97.6 and 55.42%, respectively. In these studies, the weight ratio of the magnetic fraction to biochar, temperature, and carbonization time were 1.2 (g/g), 575 °C, and 130 min, respectively. During the absorption process, the adsorption capacity of magnetic biochar increased and then reached a constant value. Therefore, the magnetic biochar has good ability to hold the adsorbed pollutants to the end of process. Also, as the initial pollutant concentration increased, the adsorption capacity unexpectedly increased and eventually reached its maximum, indicating a high affinity of the magnetic biochar with the pollutants.Keywords: Activated carbonadsorptionmagneticbiocharbiomasscarbonization AcknowledgmentsThe support of this organization is appreciated.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis study was funded by the University of Lorestan, Lorestan, Iran.
{"title":"Removal of pollutants from aqueous solution with magnetic biochar: a mini review","authors":"Jalil Kermannezhad, Hassan TorabiPoodeh, Elham Ghanbari-Adivi, Babak ShahiNezhad","doi":"10.1080/02726351.2023.2255834","DOIUrl":"https://doi.org/10.1080/02726351.2023.2255834","url":null,"abstract":"AbstractIn the last decade, there has been increasing scrutiny of using biochar to remove pollutants from the waste water. However, due to particle size of biochar and the difficulty of its separation after the adsorption process, the use of these adsorbents has always been a challenge, until magnetic biochar (MB) was proposed by researchers. The production of MB is divided into pre-pyrolysis and post- pyrolysis methods. The MB activation/modification methods included physical and chemical activation/ammonization, sulfurization, oxidation, polymerization and MB production without modification/activation was investigated. In this research, studies that produced MB as a one-step heating and post-pyrolysis method reviewed. The results showed that the capacity of different MB to remove lead, cadmium, chromium, copper, and arsenic was calculated to be 96.9, 91.2, 90.5, 97.6 and 55.42%, respectively. In these studies, the weight ratio of the magnetic fraction to biochar, temperature, and carbonization time were 1.2 (g/g), 575 °C, and 130 min, respectively. During the absorption process, the adsorption capacity of magnetic biochar increased and then reached a constant value. Therefore, the magnetic biochar has good ability to hold the adsorbed pollutants to the end of process. Also, as the initial pollutant concentration increased, the adsorption capacity unexpectedly increased and eventually reached its maximum, indicating a high affinity of the magnetic biochar with the pollutants.Keywords: Activated carbonadsorptionmagneticbiocharbiomasscarbonization AcknowledgmentsThe support of this organization is appreciated.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis study was funded by the University of Lorestan, Lorestan, Iran.","PeriodicalId":19742,"journal":{"name":"Particulate Science and Technology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136342192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-28DOI: 10.1080/02726351.2023.2259336
Jagadeesh Banka, Anant Kumar Rai
AbstractPrimary goal of this article is to present recent developments in erosion research and associated particles in centrifugal slurry pumps. Solid particles in transported liquid cause severe erosion of components in centrifugal pumps causing poor performance and reduced lifespan. Erosion necessitates frequent repairs and maintenance replacements, resulting in significant financial losses. This article summarizes the effect of slurry erosion on the performance characteristics of centrifugal pumps handling different fluid and solid mixtures, as well as methods to reduce erosion. According to the majority of the literature, particle properties, pump geometry, and operating parameters have a paramount influence on pump characteristics. Recently, researchers attempted to improve the performance characteristics of centrifugal pumps by employing various flow visualization techniques, which also aid in understanding the solid particle interaction with various pump components. Therefore, recent advancements in flow visualization technology inside the centrifugal pump are also included. Further, specific studies on erosion in centrifugal slurry pumps from different industries are also provided. This study is beneficial to designers, process managers and researchers involved with slurry centrifugal pumps.Keywords: Centrifugal slurry pumpPIVparticleerosionsedimentefficiency AcknowledgmentThe authors would like to thank Science and Engineering Research Board [Grant No. SRG/2020/002452], India for financially supporting the present work.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe authors would like to thank Science and Engineering Research Board [Grant No. SRG/2020/002452], India for financially supporting the present work.
{"title":"Erosion and flow visualization in centrifugal slurry pumps: a comprehensive review of recent developments and future outlook","authors":"Jagadeesh Banka, Anant Kumar Rai","doi":"10.1080/02726351.2023.2259336","DOIUrl":"https://doi.org/10.1080/02726351.2023.2259336","url":null,"abstract":"AbstractPrimary goal of this article is to present recent developments in erosion research and associated particles in centrifugal slurry pumps. Solid particles in transported liquid cause severe erosion of components in centrifugal pumps causing poor performance and reduced lifespan. Erosion necessitates frequent repairs and maintenance replacements, resulting in significant financial losses. This article summarizes the effect of slurry erosion on the performance characteristics of centrifugal pumps handling different fluid and solid mixtures, as well as methods to reduce erosion. According to the majority of the literature, particle properties, pump geometry, and operating parameters have a paramount influence on pump characteristics. Recently, researchers attempted to improve the performance characteristics of centrifugal pumps by employing various flow visualization techniques, which also aid in understanding the solid particle interaction with various pump components. Therefore, recent advancements in flow visualization technology inside the centrifugal pump are also included. Further, specific studies on erosion in centrifugal slurry pumps from different industries are also provided. This study is beneficial to designers, process managers and researchers involved with slurry centrifugal pumps.Keywords: Centrifugal slurry pumpPIVparticleerosionsedimentefficiency AcknowledgmentThe authors would like to thank Science and Engineering Research Board [Grant No. SRG/2020/002452], India for financially supporting the present work.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe authors would like to thank Science and Engineering Research Board [Grant No. SRG/2020/002452], India for financially supporting the present work.","PeriodicalId":19742,"journal":{"name":"Particulate Science and Technology","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135385109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-26DOI: 10.1080/02726351.2023.2261420
Gourav Saluja, S. S. Mallick, Sujay Karmakar
AbstractPneumatic fly ash conveying systems in thermal power plants are often not able to transport ash as per their expected duty due to either variability of ash characteristics and/or inadequate system sizing resulting in generation loss and reduced ash utilization. This paper results from an ongoing investigation into the relationship between the physical characteristics of ash to some of the important design criteria, such as ash conveyability and flowability. Based on a comprehensive test program including the pneumatic conveying (in a pilot plant) and flow property testing of 23 ash samples obtained from five different power stations, predictions for conveyability and flowability have been made using bulk property characterization. Of all the different particle and bulk parameters investigated, the angle of repose has been found to be the most significant parameter linking conveyability and flowability. A newly developed design tool based on the angle of repose is expected to assist designers and operational engineers to predict the flow condition and appropriately size equipment/system with suitable operating parameters.Keywords: Fly ashpneumatic conveyingflowabilityhausner ratioangle of repose AcknowledgementThe authors would like to thank NTPC Ltd., India for the sponsored research project – sanction letter ref. 9100000168-151-1001. “NTPC sponsored Research Scholar, Gouarv Saluja, would like to thank NTPC for providing him scholarship”.The authors would like to acknowledge the collaboration between Thapar Institute of Engineering & Technology (TIET) and Granutools (Belgium) for the use of the GranuHeap instrument.Disclosure statementNo potential conflict of interest was reported by the author(s).
{"title":"Predicting pneumatic conveyability and flowability of fly ash using bulk property characterization","authors":"Gourav Saluja, S. S. Mallick, Sujay Karmakar","doi":"10.1080/02726351.2023.2261420","DOIUrl":"https://doi.org/10.1080/02726351.2023.2261420","url":null,"abstract":"AbstractPneumatic fly ash conveying systems in thermal power plants are often not able to transport ash as per their expected duty due to either variability of ash characteristics and/or inadequate system sizing resulting in generation loss and reduced ash utilization. This paper results from an ongoing investigation into the relationship between the physical characteristics of ash to some of the important design criteria, such as ash conveyability and flowability. Based on a comprehensive test program including the pneumatic conveying (in a pilot plant) and flow property testing of 23 ash samples obtained from five different power stations, predictions for conveyability and flowability have been made using bulk property characterization. Of all the different particle and bulk parameters investigated, the angle of repose has been found to be the most significant parameter linking conveyability and flowability. A newly developed design tool based on the angle of repose is expected to assist designers and operational engineers to predict the flow condition and appropriately size equipment/system with suitable operating parameters.Keywords: Fly ashpneumatic conveyingflowabilityhausner ratioangle of repose AcknowledgementThe authors would like to thank NTPC Ltd., India for the sponsored research project – sanction letter ref. 9100000168-151-1001. “NTPC sponsored Research Scholar, Gouarv Saluja, would like to thank NTPC for providing him scholarship”.The authors would like to acknowledge the collaboration between Thapar Institute of Engineering & Technology (TIET) and Granutools (Belgium) for the use of the GranuHeap instrument.Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":19742,"journal":{"name":"Particulate Science and Technology","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134886134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-25DOI: 10.1080/02726351.2023.2261391
Xuebin Zhang, Youjun Tao
AbstractThe work conducted flow field analysis of a typical hydrocyclone (φ500 type) in the Coal Processing Plant using CFD simulation, including hydrocyclone modeling, flow field development, static pressure distribution, three-dimensional velocity, and air column development. Besides, the effects of influential factors on the classification effect of hydrocyclone were studied. On this basis, a novel hydrocyclone model was developed and simulated for the ultrafine classification of coal slurry. The static pressure and velocity in the typical hydrocyclone have good symmetry and certain regularity. Decreasing the overflow pipe diameter and cone angle, while increasing the underflow pipe diameter, cylindrical section height, and feed rate will increase the classification efficiency of hydrocyclone. The novel hydrocyclone designed of annular feeding, small cone angle, and large cone bottom reduces energy consumption, decreases classification size, and improves classification accuracy. CFD simulation results show that the novel hydrocyclone has higher classification efficiency and smaller classification size over the typical hydrocyclone. The novel hydrocyclone develops an excellent ultrafine classification effect of coal slurry and provides a prospective approach for the industrial application of hydrocyclone in the fine coal ultrafine classification process.Keywords: Hydrocycloneultrafine classificationcoal slurryclassification efficiencyflow field simulation Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the National Natural Science Foundation of China under Grant No. [51874303].
{"title":"CFD simulation on internal flow field of typical hydrocyclone for coal and development of novel hydrocyclone","authors":"Xuebin Zhang, Youjun Tao","doi":"10.1080/02726351.2023.2261391","DOIUrl":"https://doi.org/10.1080/02726351.2023.2261391","url":null,"abstract":"AbstractThe work conducted flow field analysis of a typical hydrocyclone (φ500 type) in the Coal Processing Plant using CFD simulation, including hydrocyclone modeling, flow field development, static pressure distribution, three-dimensional velocity, and air column development. Besides, the effects of influential factors on the classification effect of hydrocyclone were studied. On this basis, a novel hydrocyclone model was developed and simulated for the ultrafine classification of coal slurry. The static pressure and velocity in the typical hydrocyclone have good symmetry and certain regularity. Decreasing the overflow pipe diameter and cone angle, while increasing the underflow pipe diameter, cylindrical section height, and feed rate will increase the classification efficiency of hydrocyclone. The novel hydrocyclone designed of annular feeding, small cone angle, and large cone bottom reduces energy consumption, decreases classification size, and improves classification accuracy. CFD simulation results show that the novel hydrocyclone has higher classification efficiency and smaller classification size over the typical hydrocyclone. The novel hydrocyclone develops an excellent ultrafine classification effect of coal slurry and provides a prospective approach for the industrial application of hydrocyclone in the fine coal ultrafine classification process.Keywords: Hydrocycloneultrafine classificationcoal slurryclassification efficiencyflow field simulation Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the National Natural Science Foundation of China under Grant No. [51874303].","PeriodicalId":19742,"journal":{"name":"Particulate Science and Technology","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135815189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AbstractIn order to further improve the trapping effect of fine particles, an improved electrostatic cyclone precipitator (ECP) was proposed. The electromagnetic dust-removal mechanism of spherical cylindrical ECP was revealed, and the influences of flue gas velocity on the dust-removal effect of fine particles with and without magnetic confinement effect were discussed. The results show that the overall efficiency curve of fine particles shows a ' hump ' type with the change of flue gas velocity, and the increase of magnetic induction intensity promotes the hump to move to the low flue gas velocity area. Increasing magnetic induction intensity can improve the trapping performance of spherical cylindrical magnetically constrained ECP, and the improvement effect weakens gradually when the same amplitude increases.Keywords: Spherical cylindrical ECPmagnetic confinement effectfine particlesdust-removal performancehump AcknowledgmentsThis work is sponsored by National Natural Science Foundation of China (12172228, 11572187), Natural Science Foundation of Shanghai (22ZR1444400), the Program of Foundation of Science and Technology Commission of Shanghai Municipality (22dz1206005, 22dz1204202), and Shanghai Professional Technical Service Platform for Intelligent Operation and Maintenance of Renewable Energy (22DZ2291800).Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementDue to the sensitive nature of the questions asked in this study, raw data would remain confidential and would not be shared.Additional informationFundingThis work is sponsored by National Natural Science Foundation of China (12172228, 11572187), Natural Science Foundation of Shanghai (22ZR1444400), the Program of Foundation of Science and Technology Commission of Shanghai Municipality (22dz1206005, 22dz1204202), and Shanghai Professional Technical Service Platform for Intelligent Operation and Maintenance of Renewable Energy (22DZ2291800).
{"title":"Dust-removal performance of an improved spherical cylindrical ECP under magnetic confinement effect","authors":"Jianping Zhang, Zhuo Chen, Qinggang Si, Pengju Zhang, Dawen Zhao, Zhiwei Zhang, Baodong Ren","doi":"10.1080/02726351.2023.2260993","DOIUrl":"https://doi.org/10.1080/02726351.2023.2260993","url":null,"abstract":"AbstractIn order to further improve the trapping effect of fine particles, an improved electrostatic cyclone precipitator (ECP) was proposed. The electromagnetic dust-removal mechanism of spherical cylindrical ECP was revealed, and the influences of flue gas velocity on the dust-removal effect of fine particles with and without magnetic confinement effect were discussed. The results show that the overall efficiency curve of fine particles shows a ' hump ' type with the change of flue gas velocity, and the increase of magnetic induction intensity promotes the hump to move to the low flue gas velocity area. Increasing magnetic induction intensity can improve the trapping performance of spherical cylindrical magnetically constrained ECP, and the improvement effect weakens gradually when the same amplitude increases.Keywords: Spherical cylindrical ECPmagnetic confinement effectfine particlesdust-removal performancehump AcknowledgmentsThis work is sponsored by National Natural Science Foundation of China (12172228, 11572187), Natural Science Foundation of Shanghai (22ZR1444400), the Program of Foundation of Science and Technology Commission of Shanghai Municipality (22dz1206005, 22dz1204202), and Shanghai Professional Technical Service Platform for Intelligent Operation and Maintenance of Renewable Energy (22DZ2291800).Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementDue to the sensitive nature of the questions asked in this study, raw data would remain confidential and would not be shared.Additional informationFundingThis work is sponsored by National Natural Science Foundation of China (12172228, 11572187), Natural Science Foundation of Shanghai (22ZR1444400), the Program of Foundation of Science and Technology Commission of Shanghai Municipality (22dz1206005, 22dz1204202), and Shanghai Professional Technical Service Platform for Intelligent Operation and Maintenance of Renewable Energy (22DZ2291800).","PeriodicalId":19742,"journal":{"name":"Particulate Science and Technology","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135815042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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