Hydraulic deslagging type corner tangential type boiler clinker falling monitoring and automatic combustion stabilization system

A technology of hydraulic slag removal and four-corner tangent, applied in the combustion chamber, combustion method, controlled combustion, etc., can solve the problems of high heat load burner design structure, boiler coke loss, abnormal boiler shutdown, etc., to improve intelligence Operation level, avoid non-stop problem, improve the effect of safe and stable operation level

Active Publication Date: 2020-09-08
HUADIAN ELECTRIC POWER SCI INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Hydraulic deslagging type corner tangential type boiler clinker falling monitoring and automatic combustion stabilization system
  • Hydraulic deslagging type corner tangential type boiler clinker falling monitoring and automatic combustion stabilization system
  • Hydraulic deslagging type corner tangential type boiler clinker falling monitoring and automatic combustion stabilization system

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0036] Example.

[0037] Unit 1 of a company is a 300MW unit. The boilers are all subcritical parameters, natural circulation drum boilers, single furnace, one-time intermediate reheating, four-corner tangential combustion method, intermediate storage bin type pulverizing system, balanced ventilation, Π-type open air Layout, solid state slag discharge, wet slag removal machine. In June 2014, in conjunction with the unit denitrification renovation project, Zhongjie Huanliwei (Wuhan) Energy Technology Co., Ltd. carried out the boiler low-nitrogen device renovation. Due to the poor quality of coal used, the boiler was seriously coked, and the No. 1 unit had the problem of falling coke and extinguishing fires many time...

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Abstract

The invention discloses a hdraulic deslagging type corner tangential type boiler clinker falling monitoring and automatic combustion stabilization system. The system comprises a hearth, the hearth isprovided with a hearth pressure measuring point, a C-layer combustor flame detection probe, a C-layer combustor oil gun, a B-layer combustor flame detection probe, a B-layer combustor oil gun, an A-layer combustor first flame detection probe, an A-layer combustor oil gun, and an A-layer combustor second flame detection probe are arranged in the combustor area from top to bottom in sequence, a first baffle and a second baffle are connected with dry bottom hoppers on the left side and the right side of the hearth correspondingly, the bottom of the hearth is provided with a submerged chain conveyor, a first dynamic pressure sensor, a first thermocouple and a first electronic liquid level sensor are arranged on the left side of the submerged chain conveyor, a second dynamic pressure sensor, asecond thermocouple and a second electronic liquid level sensor are arranged on the right side of the submerged chain conveyor, the unit non-stop problem caused by boiler clinker falling can be effectively solved, and the unit safe and stable running level can be improved.

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...

Claims

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Application Information

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IPC IPC(8): F23M11/04F23N5/02F23N5/20F23N5/26G06F30/20G06F119/02
CPCF23M11/04F23N5/025F23N5/206F23N5/26G06F30/20G06F2119/02
Inventor 苏攀祝广场于鹏峰刘林波张才稳韩静
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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