Multi-injection staged combustion w-flame boiler with thick and light coal powder nozzles arranged alternately

A technology of staggered combustion and staggered arrangement, which is used in the combustion of lump fuel and powder fuel, the combustion of liquid fuel and powder fuel, the combustion of gaseous fuel and powder fuel, etc. question

Active Publication Date: 2011-12-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to solve the problem of NO in the operation of the W-flame boiler that currently uses the multi-injection staged combustion technology. x To solve the proble...

Method used

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  • Multi-injection staged combustion w-flame boiler with thick and light coal powder nozzles arranged alternately
  • Multi-injection staged combustion w-flame boiler with thick and light coal powder nozzles arranged alternately
  • Multi-injection staged combustion w-flame boiler with thick and light coal powder nozzles arranged alternately

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specific Embodiment approach 1

[0009] Specific implementation mode one: combine image 3 and Figure 4 Describe this embodiment, the multi-injection staged combustion W flame boiler in this embodiment with thick and light pulverized coal nozzles arranged alternately includes a lower furnace body 1, an upper furnace body 2, a front furnace arch 3 and a rear furnace arch 15. The furnace and a plurality of pulverized coal air flow nozzles, a plurality of inner secondary air nozzles 11 and a plurality of outer secondary air nozzles 13; on the front furnace arch 3 from the furnace center 2-1 to the front wall water wall 2-2 of the furnace between and between the furnace center 2-1 to the rear wall water wall 2-3 of the furnace on the back furnace arch 15, a plurality of pulverized coal air flow nozzles, a plurality of inner secondary air nozzles 11 and a plurality of outer Secondary air nozzles 13; a plurality of inner secondary air nozzles 11 are arranged at equal intervals in a line in the width direction of ...

specific Embodiment approach 2

[0010] Specific implementation mode two: combination image 3 and Figure 4 To illustrate this embodiment, the multi-injection staged combustion W-flame boiler with thick and light pulverized coal nozzles arranged alternately in this embodiment also includes a plurality of overburning air nozzles 16, which are close to the furnace on the front furnace arch 3 and the rear furnace arch 15 The position of the center 2-1 is provided with a plurality of overburning air nozzles 16, and the plurality of overburning air nozzles 16 are arranged at equal intervals in a line along the width direction of the furnace, and the overburning air nozzles 16 communicate with the lower furnace 1. In this way, the high-speed overburning air 17 is passed into the upper part of the furnace in the lower furnace body 1 through the overburning air nozzle 16. When the operating conditions are constant, the total air volume of the boiler remains unchanged, and the corresponding internal secondary air 6 ...

specific Embodiment approach 3

[0011] Specific implementation mode three: combination image 3 The present embodiment will be described. The acute angle between the centerline of the overburned air nozzle 16 and the horizontal plane in the present embodiment is 40°. With such a setting, the high wind speed is better maintained to maintain the effect of injecting pulverized coal airflow downward. Other compositions and connections are the same as those in the second embodiment.

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Abstract

The invention relates to a W-flame boiler with multiple ejections and staged combustion, which is used to solve problems of NOx discharge and high content of combustible matters in fly ash existing in W-flame boilers with present technologies of multiple ejections and staged combustion. The W-flame boiler of the invention is characterized in that: a plurality of thick pulverized coal nozzles comprise a plurality of thick pulverized coal nozzle clusters, and each thick pulverized coal nozzle cluster is formed by two thick pulverized coal nozzles which are close together; a plurality of thin pulverized coal nozzles comprise a plurality of thin pulverized coal nozzle clusters, and each thin pulverized coal nozzle cluster is formed by two thin pulverized coal nozzles which are close together; and the thick pulverized coal nozzle clusters and the thin pulverized coal nozzle clusters are arranged in an in-line and equal interval way along the hearth width direction, and the thick pulverized coal nozzle clusters and the thin pulverized coal nozzle clusters are arranged in a side by side and interlaced way. The W-flame boiler of the invention allows the NOx discharge to be greatly reduced, and the combustible matters content in the fly ash to be reduced.

Description

technical field [0001] The invention relates to a multi-injection staged combustion W-flame boiler, in particular to a multi-injection staged combustion W-flame boiler with thick and light coal powder nozzles arranged alternately, belonging to the technical field of W-flame boiler combustion. Background technique [0002] The W flame combustion boiler is a boiler specially designed for burning anthracite and lean coal. The following problems generally exist in the operation of this boiler: the pulverized coal airflow ignites late and the flame stability is poor, the content of fly ash combustibles is high, and the Severe slagging and NO x The emission is as high as 1600~1800mg / m 3 . Chinese Invention Patent Application "Multiple Injection Staged Combustion Method and W Flame Boiler Device for Realizing the Method" (public date is September 15, 2010, application number is 201010149634.5, application date is April 19, 2010, hereinafter It is called "Document 1") in detail a...

Claims

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Application Information

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IPC IPC(8): F23C5/08F23C7/00
Inventor 李争起况敏张岩陈智超
Owner HARBIN INST OF TECH
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