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An upper and lower thick and thin pulverized coal combustion device

A combustion device and a technology of thick and thin pulverized coal, applied in the direction of using various fuel combustion, burners, combustion methods, etc., can solve the problems of primary air deflection, water wall slagging, high-temperature corrosion, etc., and achieve the goal of reducing the formation of NOx Effect

Active Publication Date: 2016-05-11
BEIJING GUODIAN LONGGAOKE ENVIRONMENT ENG& TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems that the existing upper and lower rich-lean burners are easy to cause primary air deflection, water wall slagging and high-temperature corrosion

Method used

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  • An upper and lower thick and thin pulverized coal combustion device
  • An upper and lower thick and thin pulverized coal combustion device
  • An upper and lower thick and thin pulverized coal combustion device

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0018] Specific implementation mode one: combine figure 1 , image 3 , Figure 4 and Figure 5 Describe this embodiment, this embodiment includes housing 12, and described pulverized coal combustion device also includes middle peripheral wind passageway 5, a plurality of baffles 6, primary air nozzle 1 of thick pulverized coal and primary air nozzle 2 of light pulverized coal, housing The inner cavity of 12 is a pulverized coal separation channel, and the plurality of baffles 6 are arranged obliquely in the pulverized coal separation channel in turn, and the pulverized coal airflow is separated by the plurality of baffles 6 into a primary air flow of concentrated pulverized coal and a primary air flow of light pulverized coal. Air flow, the primary air flow of concentrated coal powder and the primary air flow of light coal powder respectively enter the primary air channel 3 of concentrated coal powder and the primary air channel 4 of light coal powder, and the two are set in...

specific Embodiment approach 2

[0019] Specific implementation mode two: combination figure 1 To describe this embodiment, the number of the plurality of baffles 6 in this embodiment is 2-5. Such arrangement makes it easy to separate the pulverized coal channel into two separate pulverized coal channels of thick and thin. Other compositions and connections are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Specific implementation mode three: combination figure 1 The present embodiment will be described, and the number of the plurality of baffles 6 in the present embodiment is three. With this setting, the separation effect of the pulverized coal separation channel is good, the resistance is small, and the distribution of the air flow on both sides of the thick and thin is relatively uniform. Other compositions and connections are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to an upper-lower concentrated-diluted pulverized-coal burning device and relates to a tangential straight-flow pulverized-coal burning device. The invention aims to solve the problems of primary-wind deflection, water-cooled wall slag bonding and high-temperature corrosion which are easily caused by an existing upper-lower concentrated-diluted pulverized-coal burner. The inner cavity of the shell of the upper-lower concentrated-diluted pulverized-coal burning device is a pulverized-coal separating channel, a plurality of baffle plates are sequentially and obliquely arranged in the pulverized-coal separating channel, a concentrated pulverized-coal airflow and a diluted pulverized-coal airflow after being separated respectively enter a concentrated pulverized-coal primary-wind channel and a diluted pulverized-coal primary-wind channel, a middle surrounding-wind channel is arranged between the concentrated pulverized-coal primary-wind channel and the diluted pulverized-coal primary-wind channel, a concentrated pulverized-coal spout is arranged at the spout end of the concentrated pulverized-coal primary-wind channel to form an independent concentrated pulverized-coal channel, a diluted pulverized-coal spout is arranged at the spout end of the diluted pulverized-coal primary-wind channel to form an independent diluted pulverized-coal primary-wind channel, and the swing control for the two spouts is respectively carried out. The upper-lower concentrated-diluted pulverized-coal burning device is used for the pulverized-coal burning in coal-burning boilers.

Description

technical field [0001] The invention belongs to the tangential combustion technology of a pulverized coal furnace, and in particular relates to an upper and lower dense and thin coal pulverized combustion device. Background technique [0002] The tangential combustion technology of pulverized coal furnace generally refers to the way that the pulverized coal airflow is introduced into the furnace for combustion from the straight-through burners arranged at the 4 corners (or 6 corners, 8 corners) of the furnace. The air-powder mixture from each corner works together to form a strong swirling fireball in the furnace. Generally, the primary and secondary air outlets are often arranged at intervals, and the geometric centerlines of each air outlet are respectively tangent to one or several imaginary circles in the center. [0003] The upper and lower thick-lean combustion technology has been widely used in the field of direct current tangential pulverized coal combustion. It cl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C5/32F23D1/00
Inventor 王正阳果志明刘庆威邸艳龙杜大全辛德富李慧生张小弟
Owner BEIJING GUODIAN LONGGAOKE ENVIRONMENT ENG& TECH