It has been carried out the properties, production volume and application balance analysis of coke oven gas, produced in 2020 by seven Ukrainian coke-chemical enterprises and plants, located at the territory controlled by Ukraine. Studies have been established the total volume of raw coke oven gas to be purified from hydrogen sulfide (given up to 4000 kcal/m3 ) – 4223,4 million m3 and the degree of its purification – 88,7 %, which compared to 2019 is less by 1,8 % (in quantitative terms per 76 million m3 ) and 1,1 %, respectively. Physicchemical properties indicators of heating coke oven gas in terms of hydrogen sulfide and naphthalene mass concentration, as well as lower specific calorific value, corresponded to the norm for the Ι grade. The total volume of coke oven gas (given up to 4000 kcal/m3 ), produced by coke-chemical enterprises and plants, was equal to 4239,7 million m3 , coke oven gas output from 1 ton of dry charge – 351 m3 , which compared to 2019 is less by 2,0 % (in quantitative terms per 87082 thousand m3 ) and more by 0,3 % (in quantitative terms per 1 m3 ), respectively. According to 6 enterprises, the volume of purified coke oven gas (given up to 4000 kcal/m3 ) used for own needs amounted to 70 %, provided for metallurgists and other consumer’s needs – 25 %, unused – 5 %. Because of consequences of hostilities, the issue of the ability of domestic coke-chemical enterprises to manufacture products becomes very relevant. The analysis presented in the article should be used to assess the losses caused to Ukrainian enterprises and plants by the armed aggression of the Russian Federation. Keywords: analysis, coke-chemical production, coke oven gas, fuel, moisture, coal tar, crude benzene, hydrogen sulfide, condensation, purification, directions of the application, balance. Corresponding author S.V. Chaplianko, e-mail: chaplianko_sv@ukr.net
{"title":"The coke oven gas production`s volume analysis of ukrainian coke-chemical enterprises in 2020.","authors":"Kravchenko S.A., Starovoit A.G., Turkina O.V., Chaplianko S.V., Cherviak-Voronych L.A.","doi":"10.31081/1681-309x-2022-0-6-13-17","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-6-13-17","url":null,"abstract":"It has been carried out the properties, production volume and application balance analysis of coke oven gas, produced in 2020 by seven Ukrainian coke-chemical enterprises and plants, located at the territory controlled by Ukraine. Studies have been established the total volume of raw coke oven gas to be purified from hydrogen sulfide (given up to 4000 kcal/m3 ) – 4223,4 million m3 and the degree of its purification – 88,7 %, which compared to 2019 is less by 1,8 % (in quantitative terms per 76 million m3 ) and 1,1 %, respectively. Physicchemical properties indicators of heating coke oven gas in terms of hydrogen sulfide and naphthalene mass concentration, as well as lower specific calorific value, corresponded to the norm for the Ι grade. The total volume of coke oven gas (given up to 4000 kcal/m3 ), produced by coke-chemical enterprises and plants, was equal to 4239,7 million m3 , coke oven gas output from 1 ton of dry charge – 351 m3 , which compared to 2019 is less by 2,0 % (in quantitative terms per 87082 thousand m3 ) and more by 0,3 % (in quantitative terms per 1 m3 ), respectively. According to 6 enterprises, the volume of purified coke oven gas (given up to 4000 kcal/m3 ) used for own needs amounted to 70 %, provided for metallurgists and other consumer’s needs – 25 %, unused – 5 %. Because of consequences of hostilities, the issue of the ability of domestic coke-chemical enterprises to manufacture products becomes very relevant. The analysis presented in the article should be used to assess the losses caused to Ukrainian enterprises and plants by the armed aggression of the Russian Federation. Keywords: analysis, coke-chemical production, coke oven gas, fuel, moisture, coal tar, crude benzene, hydrogen sulfide, condensation, purification, directions of the application, balance. Corresponding author S.V. Chaplianko, e-mail: chaplianko_sv@ukr.net","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124570391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.31081/1681-309x-2021-0-5-25-32
A. Grigorov, М.О. Tokarev, M. Polishchuk, O. Zharova
The possibility has been considered of obtaining of fuel briquettes as an alternative biofuel based on fallen leaves (such tree species as oak and maple) and starch. The starch (a binder) content at the level of 10-30 % allows to produce of the briquettes using a screw press at a pressure of up to 15 MPa. The process of fuel briquettes obtaining from fallen leaves and starch included the following successive stages: collection of raw materials; preparation; averaging; mixing; pressing; drying and the testing of the product properties. At the last stage, the appearance of the obtained briquettes has been evaluated, and then their density (ρ, kg/m3 ), strength (P, MPa), working heat of combustion (Q, MJ/kg) and storage conditions have been determined. Evaluation of the appearance of briquettes showed that the correct geometric shape had those briquettes in which the weight content of the starch was in the range of 20-25 % to leaves weight. It was found out that the maximum value of briquette density (580 kg/m3 ) and compressive strength (4,8 MPa) is observed in the fuel briquettes which contained 25 % of starch. That is, this concentration can be considered optimal for this technology for the production of fuel briquettes. At the same time, the increase of starch content in the fuel briquette leads to an increase its working heat of combustion, which at a starch content of 25 % reached the value of 17.8 MJ/kg. It has been fixed that the influence of temperature (storage at 80 °C for 6 h) or temperature differences (from -10 to 25-30 °C) practically does not affect the form and properties of fuel briquettes obtained from fallen leaves. And the stay of briquettes in a humid environment, on the contrary, leads to its swelling, and, as a consequence, to the impairment of properties. Keywords: fuel briquettes, leaves, starch, pressing, density, strength, heat of combustion, storage conditions. Corresponding author A.B. Grigorov, e-mail: grigorovandrey@ukr.net
{"title":"APPLYING OF FALLED LEAVES IN PRODUCTION OF FUEL BRIQUETTES","authors":"A. Grigorov, М.О. Tokarev, M. Polishchuk, O. Zharova","doi":"10.31081/1681-309x-2021-0-5-25-32","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-5-25-32","url":null,"abstract":"The possibility has been considered of obtaining of fuel briquettes as an alternative biofuel based on fallen leaves (such tree species as oak and maple) and starch. The starch (a binder) content at the level of 10-30 % allows to produce of the briquettes using a screw press at a pressure of up to 15 MPa. The process of fuel briquettes obtaining from fallen leaves and starch included the following successive stages: collection of raw materials; preparation; averaging; mixing; pressing; drying and the testing of the product properties. At the last stage, the appearance of the obtained briquettes has been evaluated, and then their density (ρ, kg/m3 ), strength (P, MPa), working heat of combustion (Q, MJ/kg) and storage conditions have been determined. Evaluation of the appearance of briquettes showed that the correct geometric shape had those briquettes in which the weight content of the starch was in the range of 20-25 % to leaves weight. It was found out that the maximum value of briquette density (580 kg/m3 ) and compressive strength (4,8 MPa) is observed in the fuel briquettes which contained 25 % of starch. That is, this concentration can be considered optimal for this technology for the production of fuel briquettes. At the same time, the increase of starch content in the fuel briquette leads to an increase its working heat of combustion, which at a starch content of 25 % reached the value of 17.8 MJ/kg. It has been fixed that the influence of temperature (storage at 80 °C for 6 h) or temperature differences (from -10 to 25-30 °C) practically does not affect the form and properties of fuel briquettes obtained from fallen leaves. And the stay of briquettes in a humid environment, on the contrary, leads to its swelling, and, as a consequence, to the impairment of properties. Keywords: fuel briquettes, leaves, starch, pressing, density, strength, heat of combustion, storage conditions. Corresponding author A.B. Grigorov, e-mail: grigorovandrey@ukr.net","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122998856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.31081/1681-309x-2021-0-5-12-15
S. Abdullin, A.O. Kachura
The article is devoted to the adjustment of the efficiency of the coke dry quenching plant (CDQP) by installing the subeconomizer in the technological scheme of coke production. A work description is presented of the subeconomizers and analyzes the advantages of the subeconomizers on the existing and new CDQP blocks. It has been emphasized that in coke production one of the most important factors is the need to work all parts of the technological chain with the full productivity. Decreased productivity or disruptions in certain areas can lead to significant losses of the final product. It is shown that the dry coke quenching plant should ensure not only stable operation of the coke battery, but also the required level of coke supply for blast furnace production. Therefore, violation of the technological regime of DCQP can critically affect the production of iron and steel. The feature of dry coke quenching technology is emphasized: the increase in productivity inevitably causes an increase of the temperature of quenched coke. It is shown that one of the ways to maintain the temperature of the quenched coke at the required level is to install a subeconomizer (SE) in the scheme of DCQP. The experience of SE "GIPROKOKS" in designing the reconstruction of existing DCQP is underlined. Data on the operation of the DCQP with the SE included in the technological scheme (which has been successfully operated for more than three years) and without it are given. SE "GIPROKOKS" studies, develops and implements new technologies that can be used in the construction of new coke plants, as well as in the reconstruction of existing ones. It is shown that the use of subeconomizers in dry coke quenching plants allows to increase the productivity of DCQP units on quenched coke by about 10 % while maintaining the required temperature and quality of the obtained coke. Keywords: dry coke quenching, temperature of quenched coke, coke yield, subeconomizer, energy efficiency. Corresponding author S.Yu. Abdullin, е-mail: abdullins1979@gmail.com
{"title":"SUBECONOMIZER FOR IMPROVENT OF ENERGY EFFICIENCY OF CDQ PLANT MODULE","authors":"S. Abdullin, A.O. Kachura","doi":"10.31081/1681-309x-2021-0-5-12-15","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-5-12-15","url":null,"abstract":"The article is devoted to the adjustment of the efficiency of the coke dry quenching plant (CDQP) by installing the subeconomizer in the technological scheme of coke production. A work description is presented of the subeconomizers and analyzes the advantages of the subeconomizers on the existing and new CDQP blocks. It has been emphasized that in coke production one of the most important factors is the need to work all parts of the technological chain with the full productivity. Decreased productivity or disruptions in certain areas can lead to significant losses of the final product. It is shown that the dry coke quenching plant should ensure not only stable operation of the coke battery, but also the required level of coke supply for blast furnace production. Therefore, violation of the technological regime of DCQP can critically affect the production of iron and steel. The feature of dry coke quenching technology is emphasized: the increase in productivity inevitably causes an increase of the temperature of quenched coke. It is shown that one of the ways to maintain the temperature of the quenched coke at the required level is to install a subeconomizer (SE) in the scheme of DCQP. The experience of SE \"GIPROKOKS\" in designing the reconstruction of existing DCQP is underlined. Data on the operation of the DCQP with the SE included in the technological scheme (which has been successfully operated for more than three years) and without it are given. SE \"GIPROKOKS\" studies, develops and implements new technologies that can be used in the construction of new coke plants, as well as in the reconstruction of existing ones. It is shown that the use of subeconomizers in dry coke quenching plants allows to increase the productivity of DCQP units on quenched coke by about 10 % while maintaining the required temperature and quality of the obtained coke. Keywords: dry coke quenching, temperature of quenched coke, coke yield, subeconomizer, energy efficiency. Corresponding author S.Yu. Abdullin, е-mail: abdullins1979@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133804337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.31081/1681-309x-2021-0-6-4-17
V. Koval, D. Miroshnichenko, O.V. Bogoyavlenska
The article substantiates the importance and problems of determining of such an indicator of the quality of solid fossil fuels, as mechanical strength. The strength of coal depends on a large number of factors (viscosity, brittleness, properties of structural bonds, etc.), the change of which is impossible to take into account. Therefore, the strength of coal in the sample, piece, pack and formation must be represented by some integral index, which inevitably fluctuates around a certain average value and can be determined only approximately. The evaluation of the strength properties of coal should be carried out on the basis of mass tests using statistical methods that allow to calculate the average value and coefficient of variation. Since the strength dispersion is mainly due to the natural inhomogeneity of the coal, the excessive accuracy of the measuring instruments has almost no effect on the statistical characteristics. Laboratory methods of mechanical tests of mine samples, in comparison with full-scale, as a rule, are very accessible and, at qualitative performance of tests, are highly reliable. The properties of coal as an object of enrichment and use are largely related to its physical properties. The physical properties of coal and mineral impurities significantly affect the formation of the main parameters that characterize the particle size distribution and fractional composition, it`s changes during the mining, transportation and enrichment processes. The basic physical and mechanical properties of solid fuels from the point of view of their industrial processing have been listed, the review has been made of the most widespread methods of study of coals mechanical durability and the equipment used for these purposes. The main advantages and disadvantages have been summarized of these methods, as well as their relationship. The factors have been Indicated tinfluencing the mechanical strength of coal. The expediency of using existing methods from the point of view of informativeness for thesphere of its application has been estimated. The methods common in the coal processing industry are considered in more detail. Keywords: coal, solid fuel mining, mechanical strength, determination methods, influencing factors, grinding strength, crushing index. Corresponding author V.V. Koval, e-mail: kovalen79@gmail.com
{"title":"MECHANICAL STRENGTH OF COAL: METHODS OF DETERMINATION AND FACTORS OF INFLUENCE (REVIEW)","authors":"V. Koval, D. Miroshnichenko, O.V. Bogoyavlenska","doi":"10.31081/1681-309x-2021-0-6-4-17","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-6-4-17","url":null,"abstract":"The article substantiates the importance and problems of determining of such an indicator of the quality of solid fossil fuels, as mechanical strength. The strength of coal depends on a large number of factors (viscosity, brittleness, properties of structural bonds, etc.), the change of which is impossible to take into account. Therefore, the strength of coal in the sample, piece, pack and formation must be represented by some integral index, which inevitably fluctuates around a certain average value and can be determined only approximately. The evaluation of the strength properties of coal should be carried out on the basis of mass tests using statistical methods that allow to calculate the average value and coefficient of variation. Since the strength dispersion is mainly due to the natural inhomogeneity of the coal, the excessive accuracy of the measuring instruments has almost no effect on the statistical characteristics. Laboratory methods of mechanical tests of mine samples, in comparison with full-scale, as a rule, are very accessible and, at qualitative performance of tests, are highly reliable. The properties of coal as an object of enrichment and use are largely related to its physical properties. The physical properties of coal and mineral impurities significantly affect the formation of the main parameters that characterize the particle size distribution and fractional composition, it`s changes during the mining, transportation and enrichment processes. The basic physical and mechanical properties of solid fuels from the point of view of their industrial processing have been listed, the review has been made of the most widespread methods of study of coals mechanical durability and the equipment used for these purposes. The main advantages and disadvantages have been summarized of these methods, as well as their relationship. The factors have been Indicated tinfluencing the mechanical strength of coal. The expediency of using existing methods from the point of view of informativeness for thesphere of its application has been estimated. The methods common in the coal processing industry are considered in more detail. Keywords: coal, solid fuel mining, mechanical strength, determination methods, influencing factors, grinding strength, crushing index. Corresponding author V.V. Koval, e-mail: kovalen79@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124683770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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