System capable of preventing coke extinguishing of wet type mechanical deslagging boiler and work method thereof

Abstract

The invention discloses a system capable of preventing coke extinguishing of a wet type mechanical deslagging boiler and a work method thereof. The upper end of an inserting plate in the system is connected with a dry bottom hopper, the lower end of the inserting plate is immersed into water in a slag salvaging machine, one end of an A side suction pipe penetrates into the inserting plate, the other end of the A side suction pipe penetrates into a tail flue, one end of a B side suction pipeline penetrates into the inserting plate, the other end of the B side suction pipeline penetrates into the tail flue, an industrial water pump conveys industrial water to a water supplementing pipeline and a seal water pipeline, a waste water pump conveys the treated waste water along a treated waste water pipeline, a suction pump is adopted for enabling a large amount of water steam generated by coke falling to be sucked into a denitration inlet in time through the suction pipes, the water steam amount entering a hearth is reduced, the influence on the hearth combustion condition and the negative pressure is reduced, the shielding flame detection is avoided, when a boiler is started, the suctionpump is used for sucking the high-temperature smoke into the denitration inlet in time through the suction pipes, the smoke temperature of the denitration inlet can be increased, and the full-load denitration is achieved.

Description

technical field [0001] The invention relates to a system for preventing coke loss and fire extinguishing of a wet mechanical slagging boiler and a working method thereof. Background technique [0002] At present, due to the large gap between the type of coal fired and the designed type of coal, defects in boiler structure design, and improper operation of large-scale power station coal-fired boilers, the water-cooled wall of the furnace and the high-temperature heating surface are severely coked, which reduces the thermal efficiency of the boiler and increases the coal consumption. High, the economy becomes poor; especially when the coking is serious, large coke pieces will fall into the slag hopper. For wet mechanical slagging and hydraulic slagging boilers, large coke blocks fall into the slag hopper or the slag extractor water, such as the Chinese patent No. 201420316389.6, which will cause a large amount of water vapor to enter the furnace, causing great damage to the fu...

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Problems solved by technology

[0002] At present, due to the large gap between the type of coal fired and the designed type of coal, defects in boiler structure design, and improper operation of large-scale power station coal-fired boilers, the water-cooled wall of the furnace and the high-temperature heating surface are severely coked, which reduces the thermal efficiency of the boiler and increases the coal consumption. High, the economy becomes poor; especially when the coking is serious, large coke pieces will fall into the slag hopper

For wet mechanical slagging and hydraulic slagging boilers, large coke blocks fall into the slag hopper or the slag extractor water, such as the Chinese patent No. 201420316389.6, which will cause a large amount of water vapor to enter the furnace, causing great damage to the furnace combustion. The impact will cause the furnace to deflagrate, and the water vapor will block the fire detector, causing the negative pressure of the furnace to fluctuate violently, causing a fire extinguishing accident in the furnace, and affecting the safe operation of the unit

[0003] Wet mechanical slag removal and hydraulic slag removal are more common in coal-fired boilers in power plants. The problem of coke dropping and fire extinguishing has always plagued power plants. At present, there are no effective solutions and preventive measures

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