给煤量操作失误造成CFB锅炉回料阀堵塞的研究

The Research on CFB Boiler Return Valve Blockage Caused by the Amount Error of Coal Operator

某330MW循环流化床锅炉多次发生因给煤量操作失误造成回料阀堵塞,严重影响到机组的可靠性和经济性。通过SIS系统的事故追忆,还原锅炉回料阀堵塞前的运行状态,查找出给煤机跳闸顺序有误、热工测点不准、给煤机设计不尽完善等原因,并提出具体改进措施,对于大型循环流化床预防回料阀堵塞具有借鉴作用,经验值得推广。

The blockage of 330MW CFB boiler has occurred many times caused by operational errors due to the amount of coal return valve, which seriously affect the unit＇s reliability and economy. Through SIS accident remembrance, we restore the operational status of the boiler return valve blockage, find out that the coal feeder trip sequence error, inaccurate thermal measurement points, and amount error of coal operator are the reasons, we propose to improve the design and make recommendations for the large CFB to prevent the return valve blockage, which are worth to be promoted.