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  燃气蒸汽锅炉停炉及保养  
 
燃气蒸汽锅炉停炉及保养
Gas steam boiler furnace and maintenance
Temporarily stop the furnace
1, according to the boiler stop time is can appropriate thickening or apply cover with a wet coal seams of coal seam. Stop the fan, open the bypass flue, closed economizer flue damper.
2 with fewer load, low steam pressure, closed the main steam valve.
3 stop temporarily during the furnace, furnace high water level, shall be maintained and monitor boiler steam pressure, water level indicator, to prevent the coal fire or again.
Normal boiler stop
1 stop to coal, (general inspection time in more than 1 week, coal in raw coal bucket must be finished), stop grate, closed coal gate.
2 to reduce blast and wind, keep the hearth negative pressure, appropriate to grate cooling. When there is no fire grate, stop blower first, open the throttle at various levels, and then closed induced draft fan, slightly in front of the furnace door, in the form of natural wind made the residual coal burning on the grate.
3 to rotate the grate slagging characteristics, ash and slag is put, and continue to run grate, until the grate cooling.
4 normal boiler stop when the steam load reduced, and should be the main steam valve closed, continuous blowdown valve closed, closed economizer flue, maintain the normal water level.
Should slow cooling after 5 boiler, boiler stop after 6 hours, can open flue damper for wind and water. Later, water every 2 hours, drain, make boiler parts temperature even, when the boiler water temperature is below 700 c, can put all the boiler water all, put the boiler water should be open the air valve of the pan hu or raise a safety valve.
3 emergency stop furnace
1 stop to coal and air, weaken the wind.
2 grate should be at top speed to send coal dust, and sand or wet ashes of the furnace pressure will be fire, but in any case may not be around the water cooling in furnace boiler. Grate before cooling may not halt.
After 3 boiler fire-extinguishing, should close the main steam valve, induced draft fan. Depending on the nature of the accident, if necessary, can open safety valve, air valve, discharge of steam, in order to reduce pressure.
4 open economizer bypass flue gate, grey door and the oven door, cooling rate of progress.
5 emergency stop furnace without water shortage and spill water phenomenon, can be used to speed up the cooling water and drainage way and reduce the boiler pressure. When the water temperature has dropped below 700 c, can put a net the boiler water.
6 such as boiler boiler stop due to water shortage accident, it is strictly prohibited to the boiler feed water, also can't work on the adjustment of the reinforced platoon steam.
7).at of water spill, should immediately stop water and burning, open the drain valve water, reduce water level appropriate, at the same time to drain the steam pipe.
After 8 boiler furnace cooling water stop, should in the soda line device of a certain intensity blind plate, with other coupling system running of boiler.
暂时停炉
1根据停炉时间的是非,可适当的加厚煤层或用湿煤敷盖煤层。蒸汽锅炉停止风机,开启旁路烟道,封闭省煤器烟道档板。
2随着负荷的减少,汽压的降低,封闭主汽阀。
3暂时停炉期间,应维持炉内高水位,并监视锅炉汽压、水位表变化情况,防止燃煤灭火或复燃。
正常停炉
1停止给煤,(一般检验时间在1周以上的,必须将原煤斗中的煤用完),停止炉排运转,封闭煤闸板。
2减少鼓风和引风,保持炉膛适当负压,以冷却炉排。当炉排上没有火焰时,先停鼓风机,打开各级风门,再封闭引风机,稍开炉前的炉门,以自然透风的方式使炉排上的余煤燃尽。
3重新转动炉排将灰渣放尽,并继续运转炉排,直至炉排冷却。
4正常停炉当蒸汽负荷降低时,应并闭主蒸汽阀,封闭连续排污阀,封闭省煤器烟道,保持锅炉正常水位。
5停炉后应缓慢冷却,停炉6小时以后,方可开启烟道档板进行透风和上水。以后,每隔2小时上水,排污1次,使蒸汽锅炉各部分温度均匀,当炉水温度低于700C时,方可将炉水全部放尽,放炉水时应将打开锅沪的空气阀或抬起一个安全阀。
3紧急停炉
1停止给煤和送风、减弱引风。
2炉排应以最高速将燃煤送进落灰斗,并用砂土或湿炉灰将火压灭,但在任何情况下不得往炉膛里绕水冷却锅炉。炉排未冷却前不得停转。
3锅炉灭火后,应封闭主汽阀、引风机。视事故的性质,必要时可开启安全阀、空气阀,排放蒸汽,以降低压力。
4开启省煤器旁路烟道闸门、灰门和炉门,进步冷却速度。
5紧急停炉如无缺水和溢水现象,可采用上水和排污的方式来加速冷却和降低锅炉压力。当水温降到700C以下时,方可将炉水放净。
6如锅炉灭因缺水事故而停炉时,严禁向锅炉进水,也不能进行有关加强排汽的调整工作。
7判明为溢水事故时,应立即停止上水,减弱燃烧,开启排污阀放水,使水位适当降低,同时对有关蒸汽管道进行疏水。
8锅炉停炉冷却放水后,应在汽水管路中装置一定强度的盲板,使之与其它运行蒸汽锅炉的联接系统隔开。
Boiler stop maintain
停炉保养
Maintenance work should be done during boiler boiler stop maintain (methods are: thermal protection, wet maintenance, dry maintenance and maintenance, etc.) fully. Specific maintenance methods, the use of the unit could be selected according to the actual situation.

锅炉停炉保养期间应做好防腐保养工作(方法有:热力保护、湿法保养、干法保养和充分保养等)。具体采用的保养方法,使用单位可按实际情况选用。 

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