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A combustion system and method for a boiler on the front wall or rear wall of a power station

A technology of a combustion system and a combustion method, which is applied in the direction of combustion methods, combustion using various fuels, combustion using block fuels and powder fuels, etc., which can solve problems such as high emissions and poor combustion stability, and achieve a reduction in land occupation Space, low economic benefits, and the effect of reducing renovation costs

Active Publication Date: 2022-02-22
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a combustion system and method for boilers on the front wall or rear wall of a power station to solve the problems of low-load and ultra-low-load stable combustion capability, NO x The problem of high emissions

Method used

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  • A combustion system and method for a boiler on the front wall or rear wall of a power station
  • A combustion system and method for a boiler on the front wall or rear wall of a power station
  • A combustion system and method for a boiler on the front wall or rear wall of a power station

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Embodiment Construction

[0026] see Figure 1-Figure 3 As shown, 1. A combustion system of a boiler on the front wall or rear wall of a power station in this embodiment is characterized in that it includes a furnace 1, a main burner 2, a pre-chamber burner 3, a powder feeder 7 and a powder storage bin 8 , the front wall 5 and the rear wall 6 are arranged on the furnace wall of the furnace 1, wherein the pre-combustion chamber burner 3 is connected to the powder feeder 7, the powder storage bin 8 is connected to the powder feeder 7, and the main burner 2 is arranged on the rear wall 6 or the front wall. wall 5, the pre-combustion chamber burner 3 is arranged on the front wall 5 or the rear wall 6, and the boiler is a wall-type boiler. The main burner 2 is arranged correspondingly to the pre-chamber burner. When the main burner is arranged on the rear wall 6, the pre-chamber burner 3 is arranged on the front wall 5, and vice versa. The boiler operates the pre-combustion chamber burner under low load an...

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Abstract

A combustion system and method for a boiler on the front wall or rear wall of a power station, including a furnace, a main burner, a pre-combustion chamber burner, a powder feeder, and a powder storage bin, wherein the pre-combustion chamber burner is connected to the powder feeder, and the pre-combustion chamber The burners are arranged on the front or rear wall. The method includes: when the furnace flue gas temperature reaches a predetermined value, the pre-combustion chamber burners are closed one by one, the main burner is gradually opened and coal powder is fed in, the air valve of the pre-combustion chamber burner is closed, and the recirculation flue gas valve is opened; When the boiler is running at full load, all pre-combustion chamber burners are in a shutdown state, and the recirculation flue gas valve is opened; when the boiler is running at ultra-low load, the main burner is not fed with pulverized coal, and the air valve of the main burner is opened; After the low-load operation is over, the pre-chamber burners are shut down one by one, and the main burners are started one by one. At the same time, the recirculation flue gas is introduced into the pre-chamber burners. The invention solves the problems of low-load and ultra-low-load stable combustion capability, NO x The problem of high emissions.

Description

technical field [0001] The invention relates to a pulverized coal boiler of a power station, in particular to a combustion system and method for the boiler on the front wall or back wall of the power station, which is suitable for the flexible transformation of the pulverized coal boiler of the power station. Background technique [0002] In recent years, the installed capacity of clean energy has increased year by year, but it has the characteristics of intermittent, seasonal, fluctuating, and low reactive power supply performance, which poses a challenge to the peak-shaving capability of thermal power units. In order to flexibly adapt to power demand, pulverized coal boilers often need to operate under ultra-low load or low load. Therefore, ensuring the stable operation of the boiler under ultra-low load or low load is an urgent problem to be solved in the operation of pulverized coal boilers in power plants. [0003] NO x is the main factor for the formation of smog, NO...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C5/08F23K3/02F23L1/00F23L9/00
CPCF23C5/08F23K3/02F23L1/00F23L9/00F23K2203/201
Inventor 陈智超乔彦宇关硕曾令艳李争起
Owner HARBIN INST OF TECH
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