A hydraulic slag removal type four-corner cut-round boiler coke drop monitoring and automatic combustion stabilization system

Abstract

The invention discloses a hydraulic slag removal type four-corner tangential circular boiler coke drop monitoring and automatic combustion stabilization system, which includes a furnace, the furnace pressure measuring points are arranged in the furnace, and C-layer burners are arranged sequentially from top to bottom in the burner area Fire detection probe, C layer burner oil gun, B layer burner fire detection probe, B layer burner oil gun, A layer burner No. 1 fire detection probe, A layer burner oil gun and A layer burner No. 2 fire Detection probe; the No. 1 baffle and the No. 2 baffle are respectively connected to the cold ash buckets on the left and right sides of the furnace; the bottom of the furnace is equipped with a slag scraper, No. 1 dynamic pressure sensor, No. 1 thermocouple and No. 1 electronic liquid level sensor Arranged on the left side of the slag scraper; No. 2 dynamic pressure sensor, No. 2 thermocouple and No. 2 electronic liquid level sensor are arranged on the right side of the slag scraper. The invention can effectively avoid the non-stop problem of the unit due to the coking loss of the boiler, and improve the safe and stable operation level of the unit.

Description

technical field [0001] The invention relates to a hydraulic slag removal type four-corner cut-round boiler coke drop monitoring and automatic combustion stabilization system. Background technique [0002] The problem of coke loss in coal-fired power plants is one of the main factors affecting the safe and stable operation of boiler equipment. There are many reasons for boiler coking, such as the type of coal used deviates from the type of coal designed, and the type of coal used is easy to condense with a softening temperature lower than the design value. Coking coal type; high heat load in boiler furnace design section, original defects in burner design structure, etc., easily cause boiler coking, and it is difficult to effectively solve; in addition, parameters such as primary and secondary air distribution and oxygen amount in boiler combustion adjustment are not well controlled It is also easy to cause coking problems. After the boiler has a coking tendency, the soot bl...

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Problems solved by technology

[0002] The problem of coke loss in coal-fired power plants is one of the main factors affecting the safe and stable operation of boiler equipment. There are many reasons for boiler coking, such as the type of coal used deviates from the type of coal designed, and the type of coal used is easy to condense with a softening temperature lower than the design value. Coking coal type; high heat load in boiler furnace design section, original defects in burner design structure, etc., easily cause boiler coking, and it is difficult to effectively solve; in addition, parameters such as primary and secondary air distribution and oxygen amount in boiler combustion adjustment are not well controlled Reasonable and easy to cause coking problems

After the boiler has a coking tendency, the soot blowing effect of the boiler is not good, and the unit cannot perform soot blowing in the furnace or the soot blowing is not timely during the long-term low-load operation of the unit, which may easily cause the problem of boiler coke loss

[0003] For hydraulic slag removal boilers, after a large coke block falls from the height of the furnace into the slag hopper of the slag machine, a large amount of water vapor is generated by the thermal shock effect and enters the furnace. Generally, the flame detection signal of the burner will weaken or the furnace pressure will fluctuate within a short period of time, which will easily trigger the main protection action of the boiler, resulting in abnormal shutdown of the boiler, seriously threatening the safety of the unit equipment and causing great economic losses.

At present, the operators only judge the coke loss inside the boiler through the flame detection signal, furnace pressure and experience, and often the operation adjustment is not timely. The current technical means for monitoring the coke loss of the boiler is not perfect, and there is no relevant information on the coke loss monitoring of the boiler and the stable combustion of the boiler. Combined technical solutions

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