Fire Characteristics of Polyethylene Dust

Research Papers Faculty of Materials Science and Technology Slovak University of Technology Pub Date : 2021-06-01 DOI:10.2478/rput-2021-0006

Marián Škvarka, R. Kuracina, Zuzana Szabová

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Abstract

Abstract Dust is a product or by-product in many industries. To ensure effective measures of explosion prevention, it is necessary to know the fire properties of dispersed and settled dust. These parameters cannot be calculated, but can be determined on the base of measurements in standard equipment. The article deals with the measurement of fire properties of polyethylene. The values of the minimum ignition temperature of settled and dispersed dust (MIT) and the values of explosion characteristics of polyethylene dust cloud lower explosion limit (LEL), maximum pressure Pmax and maximum rate of pressure rise (dp/dt)max were measured. The measurements were performed on the equipment according to the STN EN 80079-20-2: 2016 Standard Explosive atmospheres - Part 20-2: Material characteristics - Combustible dust test methods and according to the STN EN 14034 + A1: 2011 Standard Determination of explosion characteristics of dust clouds. The MIT of the settled dust was not determined (the sample melted), the MIT of the dispersed dust was 435 °C. The maximum explosion pressure Pmax reached 7.0 bar, and the maximum rate of pressure rise dP/dt was 37.5 bar.s−1.

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聚乙烯粉尘的燃烧特性

粉尘是许多工业的产物或副产品。为确保采取有效的防爆措施，有必要了解分散粉尘和沉降粉尘的防火特性。这些参数不能计算，但可以在标准设备的测量基础上确定。本文论述了聚乙烯耐火性能的测定方法。测定了沉降粉尘和分散粉尘的最低着火温度(MIT)和聚乙烯粉尘云的爆炸特性值(LEL)、最大压力Pmax和最大压力上升率(dp/dt)max。根据STN EN 80079-20- 2:20 16标准爆炸性环境-第20-2部分:材料特性-可燃粉尘测试方法，并根据STN EN 14034 + A1: 2011标准粉尘云爆炸特性的测定，在设备上进行了测量。未测定沉降粉尘的MIT(样品熔化)，分散粉尘的MIT为435℃。最大爆炸压力Pmax达到7.0 bar，最大升压速率dP/dt为37.5 bar.s−1。

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Research Papers Faculty of Materials Science and Technology Slovak University of Technology

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