Boiler soot deposit and coking synergistic treatment device and work method thereof

Abstract

The invention relates to a boiler soot deposit and coking synergistic treatment device and a work method of the boiler soot deposit and coke synergistic treatment device. Boiler soot deposit and coking mutually accelerate and influence each other, in the prior art, boiler soot deposit and the coking are both independently treated, and the treatment effect is poor. According to the boiler soot deposit and coking synergistic treatment device, a compressed air inlet and a soot blowing steam inlet are connected with a main pipe. The main pipe is connected with a left hearth short soot blower, a right hearth short soot blower, a front wall hearth short soot blower and a back wall hearth short soot blower through connection pipes. A decoking agent storage box is connected with the four hearth short soot blowers through connection pipes. The boiler soot deposit and coke synergistic treatment device removes soot first of all and then conducts decoking, the soot removal and decoking synergisticeffect is achieved, the decoking agent is sprayed into a boiler through the soot blowers, the feature that the blowing area of the soot blowers is large is utilized to achieve that the decoking agentcan be in full and uniform contact with all the positions of the boiler wall, and targeted focused decoking according to the coking condition in the boiler can be achieved; all electromagnetic valvesare controlled by a DCS, and full automation of soot removal and decoking can be achieved; and therefore the boiler soot deposit and coking synergistic treatment device is easy and convenient to useand high in efficiency and saves energy.

Description

technical field [0001] The invention relates to a device and a working method for synergistically treating boiler ash accumulation and coking. Background technique [0002] At present, due to the large gap between the type of coal burned and the designed type of coal, defects in boiler structure design, and improper operation and other problems in large-scale power station coal-fired boilers, the water-cooled wall of the furnace and the high-temperature heating surface are severely coked and ash-deposited, which reduces the thermal efficiency of the boiler. Coal consumption rises and economic efficiency is poor; especially when coking is serious, the negative pressure of the furnace fluctuates sharply due to the falling of large coke blocks, causing fire extinguishing accidents in the furnace, affecting the safe operation of the unit, and ash accumulation and coking also promote high-temperature corrosion, greatly reducing the service life of the boiler. [0003] Boiler ash...

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Problems solved by technology

[0002] At present, due to the large gap between the type of coal burned and the designed type of coal, defects in boiler structure design, and improper operation and other problems in large-scale power station coal-fired boilers, the water-cooled wall of the furnace and the high-temperature heating surface are severely coked and ash-deposited, which reduces the thermal efficiency of the boiler. Coal consumption rises and economic efficiency is poor; especially when coking is serious, the negative pressure of the furnace fluctuates sharply due to the falling of large coke blocks, causing fire extinguishing accidents in the furnace, affecting the safe operation of the unit, and ash accumulation and coking also promote high-temperature corrosion, greatly reducing the service life of the boiler

[0003] Boiler ash accumulation and coking promote each other and affect each other. In the prior art, boiler ash accumulation or coking is treated separately, and the effect is poor

For example: use steam soot blower or sonic wave soot blower to blow soot on the furnace and heating surface, but it is difficult to deal with the viscous ash accumulation; spray decoking agent through the boiler burner to remove coke, but it is difficult to achieve The decoking agent is fully dispersed and uniform in each space inside the boiler, and the ash accumulation also affects the decoking effect. Another example is the Chinese patent "publication number CN1056707033A" which discloses a synergistic denitrification liquid boiler decoking agent and its preparation method and application. The decoking agent is atomized and sprayed at the burner port or the coking port of the boiler burner, but it is difficult to achieve full and uniform contact between the decoking agent and the furnace wall

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