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W flame boiler for avoiding clinkering on water-cooled walls of wing walls and sidewalls by four-corner ventilation

An anti-slagging, water-cooled wall technology, which is applied in the combustion of block fuel and liquid fuel, the combustion of block fuel and gaseous fuel, the combustion of block fuel and powder fuel, etc., can solve the problem of wing wall and Side wall slagging and other problems, to achieve the effect of lowering the ash melting point, easy implementation, and strong jet rigidity

Active Publication Date: 2011-01-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of severe slagging of the wing wall and side wall commonly existing in existing W flame boilers, the present invention further proposes a W flame boiler with four-corner ventilation to prevent wing wall and side wall water-cooled walls from slagging

Method used

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  • W flame boiler for avoiding clinkering on water-cooled walls of wing walls and sidewalls by four-corner ventilation
  • W flame boiler for avoiding clinkering on water-cooled walls of wing walls and sidewalls by four-corner ventilation
  • W flame boiler for avoiding clinkering on water-cooled walls of wing walls and sidewalls by four-corner ventilation

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specific Embodiment approach 1

[0010] Specific implementation mode one: as Figure 1~3 As shown, the W-flame boiler with four-corner ventilation to prevent slagging of the wing wall and the side wall water wall in this embodiment includes a wing wall 1 and a furnace arch 2, and the furnace arch 2 near the four-corner wing wall of the W flame boiler is respectively set There are the first group of nozzles I for connecting to the burner, the second group of nozzles II for connecting to the burner, the third group of nozzles III for connecting to the burner and the fourth group of nozzles for connecting to the burner Nozzle IV, the above four groups of nozzles used to connect with the burner are composed of the far wing wall thick coal powder flow nozzle 3, the far wing wall light coal powder flow nozzle 4, the oil secondary air nozzle 5, and the first anti-slagging air nozzle 6 and the second anti-slagging air nozzle 7; from the direction of looking down, the thick coal dust airflow nozzle 3 of the far wing w...

specific Embodiment approach 2

[0012] Specific implementation mode two: as Figure 4 As shown, the cross-sectional area of ​​the thick coal pulverized gas flow nozzle 3 of the far wing wall described in this embodiment is 0.1m 2 , the cross-sectional area of ​​the far wing wall light coal pulverized gas flow nozzle 4 is 0.1m 2 . That is, the thick pulverized coal spout 3 of the far wing wall is double of the thick pulverized coal spout of the original far wing wall, and the area of ​​the light pulverized coal airflow spout 4 of the far wing wall is twice of the light pulverized coal spout of the original far wing wall , and the other orifice areas remain unchanged. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0013] Embodiment 3: The W flame boiler in this embodiment also includes a fan and a wind box, and the fan and the wind box are connected to the first anti-slagging air nozzle 6 and the second anti-slagging air nozzle 7 through the anti-slagging air duct. The anti-slagging air is provided by a separate fan and bellows, and the anti-slagging air duct is connected to the anti-slagging air nozzle, thereby increasing the adjustable range of the anti-slagging air volume and improving combustion efficiency. Other compositions and connections are the same as those in Embodiment 1 or 2.

[0014] Anti-slagging principle: The anti-slagging air is drawn out from the secondary air box or a separate air box, and is directly injected into the lower furnace through the anti-slagging air nozzle. The anti-slagging wind can effectively prevent the slagging of the wing wall and the water-cooled wall of the side wall. Into the lower furnace, increase the distance between the dense pulverized coa...

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Abstract

The invention discloses a W flame boiler for avoiding clinkering on water-cooled walls of wing walls and sidewalls by four-corner ventilation and relates to the W flame boiler, solving the problem of severe clinkering on the wing walls and the sidewalls commonly existing in the current W flame boiler. The technical scheme is as follows: boiler arches close to the wing walls on the four corners of the W flame boiler are respectively provided with a group of nozzles, and each group consists of a far wing wall dense coal powder flow nozzle, a far wing wall thin coal powder flow nozzle, an oil secondary air nozzle, a first anti-clinkering air nozzle and a second anti-clinkering air nozzle; the far wing wall dense coal powder flow nozzle, the far wing wall thin coal powder flow nozzle, the first anti-clinkering air nozzle and the second anti-clinkering air nozzle are arranged on the boiler arches in a rectangular outline, the oil secondary air nozzle is arranged on the outside of the rectangular outline and is far from a hearth, the first anti-clinkering air nozzle and the second anti-clinkering air nozzle are arranged at one side close to the wing walls and the sidewalls, and the far wing wall dense coal powder flow nozzle is far from the hearth center. The W flame boiler can effectively reduce coal powder and ash particles which are impacted on the water-cooled walls of the wing walls and the sidewalls, thus avoiding clinkering on the wing walls and the sidewalls.

Description

technical field [0001] The invention relates to a W-flame boiler, in particular to a W-flame boiler with four-corner ventilation to prevent slagging of wing walls and side wall water-cooled walls, and belongs to the technical field of W-flame boilers. Background technique [0002] W Flame Boiler is a boiler specially designed for burning anthracite and lean coal. The W flame boiler manufactured by FosterWheeler (FW) in the United States adopts a double-arched furnace. The cross section is octagonal. The burners are arranged on the front and rear wall arches, and the pulverized coal flow is injected downward to form a "W" flame. In order to control the flame shape of the lower furnace, the boiler adopts the secondary air supply method step by step, the structure diagram is shown in figure 1 . In actual operation, slagging in the lower furnace of some boilers is serious, especially on the wing wall and side wall water wall, which is easy to form a large area of ​​slagging,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C5/08F23C7/00
Inventor 李争起刘光奎朱群益陈智超王振旺
Owner HARBIN INST OF TECH
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