煤堆阻燃覆盖剂的工程试验研究  

Study on flame retardant covering agent in coal pile against spontaneous combustion

作　　者：陈刚[1] 张辉[2] 张晶[2] 孙国建[2] 刘志东 薛智 吴星文 

机构地区：[1]广东电网公司电力科学研究院,广东广州510080 [2]东南大学能源与环境学院,江苏南京210096 [3]广东珠海金湾发电有限公司,广东珠海519050

出　　处：《洁净煤技术》2015年第2期101-105,共5页Clean Coal Technology

基　　金：南方电网有限责任公司科研项目(K-GD2012-390)

摘　　要：为防止煤堆自燃，以印尼煤为原料制备了煤堆阻燃覆盖剂，测定了阻燃覆盖剂孔隙率、渗透率、抗压强度和屈服强度等指标，分析了阻燃覆盖剂的阻燃机理。采用参比方法在珠海某电厂露天煤场进行煤堆阻燃覆盖剂的阻燃效果评估，研究阻燃覆盖剂覆盖层对现场条件的耐受性。结果表明：煤堆整体温度自上而下升高，阻燃覆盖剂覆盖煤堆和未覆盖煤堆的实时温度最大差值超过30℃，但覆盖煤堆自上而下的温度变化率远低于未覆盖煤堆的温度变化率；均方差变化趋势不同，均方差变化的异常是煤堆内部存在低温氧化自热效应的标志；覆盖煤堆和未覆盖煤堆的温度历史值分别为39~49℃和53~75℃。煤堆在覆盖阻燃覆盖剂150 d后，未覆盖层发生自燃，覆盖层保持完好。说明研发的阻燃覆盖剂能有效抑制煤堆低温氧化自加热进程，与实际煤堆阻燃效果一致；此外阻燃覆盖剂还有防雨损和风损作用。In order to prevent coal pile spontaneous combustion,a flame retardant covering agent（ FRCA）was prepared with Indonesia coal as raw material. The porosity,permeability,compressive strength and bending strength of FRCA were analyzed. The flame retardant mechanism was researched. The evaluation experiments were conducted at an open coal yard of Zhuhai coal-fired power plant. The refer-ence method was used to analyze the evaluation. The results showed that the temperature of coal pile increased from top to bottom,the max-imum difference of real-time temperature of covered and uncovered coal pile was over 30 ℃,the change rate of covered coal pile was far below the rate of uncovered coal pile. The unusual mean square error change indicated that there was low temperature spontaneous combus-tion. The temperature history value range of covered and uncovered coal pile was 39 ℃ to 49 ℃,53 ℃ to 75 ℃ respectively. After 150 days,the coal pile which wasn’t covered FRCA began to burn,while the coal pile covered agent was still in good state. In addition,the FR-CA can also played a role of preventing rain and wind damage losses.

关 键 词：煤堆 自燃 阻燃覆盖剂 阻燃机理 

分 类 号：TQ534[化学工程—煤化学工程]