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W-shaped flame direct-current burner pulverized coal composite furnace with fluidized bed

A fluidized bed and burner technology, which is applied to fluidized bed combustion equipment, uses a variety of fuels, and burns fuel in a molten state, etc., can solve the problem of single fuel, high fly ash content, nitrogen oxides, sulfur dioxide emissions. It can reduce the cost of desulfurization, inhibit the formation of nitrogen oxides, and reduce the overall temperature level of the furnace.

Inactive Publication Date: 2016-10-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems in the prior art of W-type pulverized coal furnace fly ash content, high nitrogen oxide and sulfur dioxide emission content, and single fuel, the present invention further provides a W-type flame direct current burner coal burner with a fluidized bed. Powder composite furnace

Method used

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  • W-shaped flame direct-current burner pulverized coal composite furnace with fluidized bed
  • W-shaped flame direct-current burner pulverized coal composite furnace with fluidized bed
  • W-shaped flame direct-current burner pulverized coal composite furnace with fluidized bed

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specific Embodiment approach 1

[0013] Specific implementation mode one: combine Figure 1-Figure 4 Describe this embodiment, a W-type flame direct-flow burner pulverized-coal composite furnace with a fluidized bed described in this embodiment, it includes a furnace body 7, at least one fluidized bed 4, a slagging pipe 5 and a plurality of direct current The primary air duct 2 of the burner, the fluidized bed 4 is installed at the bottom of the furnace body 7, the air distribution plate is installed on the fluidized bed 4, and the primary air duct 2 of multiple DC burners are all installed on the furnace arch of the furnace body 7 , the area located in the furnace body 7 close to the top of the furnace body 7 is the upper furnace, and the area located in the furnace body 7 near the upper part of the fluidized bed 4 is the dense-phase zone combustion chamber 3, which is located between the upper furnace 1 and the dense-phase zone combustion chamber 3 The area is the combustion chamber 6 of the pulverized coal...

specific Embodiment approach 2

[0014] Specific implementation mode two: combination Figure 1-Figure 3 Illustrate this embodiment, a W-type flame once-through burner pulverized-coal composite furnace with a fluidized bed described in this embodiment, the number of the fluidized bed 4 is one or two, and the W-type swirling coal The pulverized boiler is combined with the fluidized bed, and the fluidized bed 4 and the air distribution plate on the fluidized bed 4 are arranged under the compound furnace. The coal in the fluidized bed 4 is fluidized on the air distribution plate. When there are two fluidized beds, the air enters from both sides below the furnace body 7, and when the lower hearth of the composite furnace is connected with a fluidized bed 4, the air enters from one side below the furnace body 7. Other structures and functions are the same as those in Embodiment 1.

specific Embodiment approach 3

[0015] Specific implementation mode three: combination image 3 Describe this embodiment, a W-type flame direct-flow burner pulverized coal composite furnace with a fluidized bed described in this embodiment, the air distribution plate of the fluidized bed is uniformly processed with a plurality of through holes, other structures and The effect is the same as that in the first embodiment.

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Abstract

The invention discloses a W-shaped flame direct-current burner pulverized coal composite furnace with a fluidized bed, relates to a pulverized coal composite furnace, and aims to solve the problems of higher content of fly ash in a W-shaped pulverized coal furnace, high emission content of nitric oxides and sulfur dioxide and single fuel in the prior art. The W-shaped flame direct-current burner pulverized coal composite furnace comprises a furnace body, at least one fluidized bed, a slag discharge pipe and multiple direct-current burner primary wind pipes; the fluidized bed is mounted at the bottom end of the furnace body, and is provided with a wind distribution plate; the multiple direct-current burner primary wind pipes are mounted on a furnace arch of the furnace body; an area near the top end of the furnace body in the furnace body is an upper hearth; an area near the upper side of the fluidized bed in the furnace body is a dense-phase area combustion chamber; an area between the upper hearth and the dense-phase area combustion chamber is a pulverized coal furnace combustion chamber; and the top end of the slag discharge pipe is fixedly connected with the fluidized bed, and is communicated with the dense-phase area combustion chamber. The W-shaped flame direct-current burner pulverized coal composite furnace is applied to the field of boiler combustion.

Description

technical field [0001] The invention relates to a pulverized-coal composite furnace, in particular to a pulverized-coal composite furnace with a W-shaped flame direct current burner with a fluidized bed. Background technique [0002] The existing W-type pulverized coal furnace is a pulverized coal furnace with high combustion efficiency and suitable for burning low volatile coal. This type of boiler first grinds coal into coal powder, and blows it into the furnace from the furnace arch under the action of primary air and secondary air. In the furnace, the flame forms a W-shaped flame under the action of tertiary air. It has the advantages of high burnout, wide adaptability to coal types, and high combustion efficiency. However, the device has the following disadvantages: high content of fly ash, high content of nitrogen oxides and sulfur dioxide emissions, and single fuel. Contents of the invention [0003] In order to solve the problems in the prior art of W-type pulver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C6/00F23C10/00F23C5/08F23C10/20F23C10/22
CPCF23C6/00F23C5/08F23C10/002F23C10/20F23C10/22F23C2700/06
Inventor 王琦刘国栋王帅于文浩廖彭伟陆慧林
Owner HARBIN INST OF TECH
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