HAZOP分析方法在褐煤煤仓中的应用

为明确褐煤煤仓存在的主要危险因素,并实现提前预防控制,分析了HAZOP分析方法中常用工艺参数出现的偏差及原因。在阐述褐煤气化反应基本流程和褐煤煤仓基本流程的基础上,结合HAZOP安全分析方法对褐煤煤仓温度、料位、压力、O2组成和出口流量5个工艺参数进行分析,提出参数偏差导致的后果,并对各项偏差采取了安全保护措施。结果表明:在控制温度方面普遍采用在煤仓排风过滤器出口设置温度报警装置,并将煤仓与高温环境隔离,适时通入N2以维持惰性环境,通过煤仓排风将褐煤中过多挥发分排出,可有效降低爆炸风险。对于煤仓出口堵塞导致压力升高、料位上升的问题,可在煤仓出口设置振动设备,通入N2流化碎煤,并在煤仓保温伴热系统中设置温度低报警装置。

Application of HAZOP analysis method in lignite bunker

To find the dangerous factors in lignite bunker and prevent these factors harming the bunker, analyze the deviation of common technique parameters of HAZOP analysis method and the causes.Based on the basic process of lignite gasification and bunker, combining with HAZOP analysis method,investigate the choice of temperature, material level,pressure, oxygen composition and outlet flow for lignite bunker.Point the consequences led by deviation and the corresponding protective measures. The results show that, installing temperature monitoring and protection alarm at the outlet of exhaust-flow filter and keeping the bunker away from the high temperature environment can better control the temperature of bunker.Feeding N2 to bunker and exhausting the volatile matter can reduce the risks of explosion effective- ly.Installing the vibrator at the outlet of bunker,feed N2 and install low temperature alarm device in heat tracing system can deduce pressure and material level caused by the outlet jams.