ABSTRACT

Spontaneous combustion of coal in stockpiles of power plants has a significant problem worldwide which leads to several health hazards, environmental pollution and coal loss. Spontaneous combustion coal stockpiles depend on both endogenous (coal characteristics) and exogenous parameters (stockpile geometry, wind speed, wind direction, local temperature). This paper describes the laboratory experiments to study the suitability of firefighting chemicals on the spontaneous combustion/fire of coal in stockpiles. Coal samples were collected from four different heaps of coal laid in coal storage yards of Talwandi Sabo Power Limited (TSPL), Punjab. This study comprises laboratory analysis i.e., proximate analysis, ultimate analysis, critical oxidation temperature, differential scanning calorimetry (DSC) analysis, gross calorific value (GCV), particle size analysis, and field studies i.e., thermal monitoring of fire-affected area before and after firefighting chemicals. Experiments on mixtures of coal and firefighting chemical having compositions viz. 1, 2, 3, and 5%, were carried out using DSC study for optimization of inhibitors as well as its efficacy. During the laboratory study the chemical composition of 3% was found to be optimum for field application to extinguish coal stockpile fire.

摘要

发电厂库存中煤炭的自燃在世界范围内是一个严重的问题，它会导致多种健康危害、环境污染和煤炭损失。自燃煤库存取决于内源（煤特性）和外源参数（库存几何、风速、风向、当地温度）。本文介绍了研究消防化学品对库存煤炭自燃/火灾的适用性的实验室实验。煤样是从旁遮普省 Talwandi Sabo Power Limited (TSPL) 储煤场的四个不同煤堆中采集的。本研究包括实验室分析，即近似分析、最终分析、临界氧化温度、差示扫描量热法 (DSC) 分析、总热值 (GCV)、粒度分析和现场研究，即在灭火化学品之前和之后对受火灾影响的区域进行热监测。煤和具有组成即消防化学品的混合物的实验。1、2、3 和 5% 使用 DSC 研究进行，以优化抑制剂及其功效。在实验室研究中，发现 3% 的化学成分最适合现场应用来扑灭煤堆火灾。