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Method for reducing boiler hearth abrasion through computer control

A boiler furnace, computer technology, applied in the control system, combustion method, control combustion and other directions, can solve problems such as damage, containment, wall wear and so on

Active Publication Date: 2019-09-27
威立雅(哈尔滨)热电有限公司
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Problems solved by technology

However, due to the large amount of bed materials and circulating materials in the furnace, the low-temperature circulating combustion of coal in a fluidized state results in a large amount of fly ash particles in the flue gas. The wall surface is subject to severe wear and tear, local serious damage occurs, and even causes shutdown accidents

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  • Method for reducing boiler hearth abrasion through computer control
  • Method for reducing boiler hearth abrasion through computer control
  • Method for reducing boiler hearth abrasion through computer control

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Embodiment Construction

[0039] 1) According to the resistance test of the air distribution plate in the cold state of the boiler, that is: keep the negative pressure at the furnace outlet unchanged, gradually increase the primary fan until the maximum output of the fan, and automatically record the primary air volume F1 and the air chamber pressure value Pfslt by the DCS system, According to the data obtained from the experiment, draw the empty board resistance curve F1--Pfslt, and simulate the empty board resistance curve with the corresponding relationship of the data in the DCS system, such as figure 1 shown;

[0040] 2) In the cold state of the boiler, that is: the boiler has not ignited and started to heat up; put the bed material into the furnace, measure and record the true thickness T of the bed material cllt , do a fluidization test, and record the minimum primary air volume F that can guarantee the fluidization state min And the air chamber pressure P corresponding to this air volume fs ,...

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Abstract

The invention relates to a method for reducing the boiler hearth abrasion through computer control. The method comprises the following steps that the negative pressure of an outlet of a hearth is kept unchanged, a primary fan is gradually increased until the maximum output of the fan, a DCS: centralized dispersion control system is used for automatically taking point and record the primary air volume F1 and the air chamber pressure value Pfslt, and an empty board resistance curve F1--Pfslt is drawn according to the data obtained by an experiment, and an empty plate resistance curve is simulated by means of the corresponding relation of the DCS system and the data. A circulating fluidized bedboiler is high in coal type adaptability, the service life and the utilization rate of the boiler are caused to be low, and the wear mechanism of the boiler has extremely intimate connection with the concentration of materials and the wind speed of the hearth; and according to the method, starting from a boiler control angle, the lowest primary air volume is determined through a cold state test, a proper material layer thickness is selected, and a strategy for slowing down the boiler hearth abrasion through automatic control of the computer is established

Description

technical field [0001] The invention relates to a method for reducing wear of a boiler furnace by computer control. Background technique [0002] Circulating fluidized bed boiler has the advantages of strong adaptability to coal types, high combustion efficiency, low pollutant emission and good load regulation performance, and is one of the most widely used furnace types at present. However, due to the large amount of bed materials and circulating materials in the furnace, the low-temperature circulating combustion of coal in a fluidized state results in a large amount of fly ash particles in the flue gas. The wall surface is subject to severe wear and tear, local serious damage occurs, and even causes shutdown accidents. [0003] Therefore, it is necessary to understand the law of fly ash wear, find out the main wear parts and causes, choose reasonable anti-wear measures, carry out reasonable technical transformation, keep the boiler running in the best mode, and minimize ...

Claims

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Application Information

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IPC IPC(8): F22B35/18F23N1/02
CPCF22B35/18F23N1/022
Inventor 庞金石施志学杨虹王琳琳李治儒杜付高占胜高超曲波武振剑赵国明杨忠全万发光
Owner 威立雅(哈尔滨)热电有限公司
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