锅炉长期低负荷的危害

长期低负荷运行的危害：

1.影响生产正常：燃烧不稳，床温易波动，不易调节，床温温度会偏低，返料调节不易控制，可能会造成熄火；

2.影响锅炉内部换热管道的寿命：低负荷燃烧，会出现给煤量和返灰量投入不均衡，造成换热管道受热不均，易导致管道局部超温，引起管壁过热，长时间运行会增加爆管发生的几率；

3.增加尾部换热管道的腐蚀：长期低负荷运行，排烟温度会有所下降，尾部布置的换热管道的低温腐蚀发生几率增加；

4.影响锅炉的热效率：炉膛温度低，会造成不完全燃烧，锅炉效率肯定会下降；

5.容易导致尾部换热面积灰，换热效率大大降低。

The dangers of long-term low load operation

1.Affect the normal production: combustion instability, bed temperature fluctuation, it’s not easy to adjust, the bed temperature will be low, returns is hard to control, may lead to stall.

2.Effect the life of exchanger pipe inside the boiler.If low load combustion ，that will cause the coal and ash content put into disequilibrium, that will cause exchange tube uneven heating

Easily lead to local pipeline overtemperature, cause pipe wall overheating, long time operation will increase the risk of pipe explosion occurred.

3.Increase the corrosion of rear heat recovery,L ong-term low load operation, e xhaust temperature will be declined. increased the chances of low temperature corrosion for heat pipe of rear heat recovery.

4.Affect the thermal efficiency of boiler,furnace temperature is low,that will Cause incomplete combustion,Boiler efficiency will decline.

5.Easy to cause dust stratification at heat exchange area of rear heat recovery,Heat exchange efficiency will Significantly Reduce.