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A w-flame boiler with asymmetric arrangement of furnace arches

An asymmetric, furnace arch technology, applied in the field of W flame boilers and pulverized coal boilers, can solve problems such as flow field deflection, and achieve the effects of long residence time, reduced fly ash combustible content, and good burnout effect.

Active Publication Date: 2019-11-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of deflection of the flow field in the existing W flame boiler furnace, the present invention further provides a W flame boiler with an asymmetric arrangement of furnace arches

Method used

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  • A w-flame boiler with asymmetric arrangement of furnace arches

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specific Embodiment approach 1

[0012] Specific implementation mode one: combine figure 1 Describe this embodiment, a W flame boiler with an asymmetric arrangement of furnace arches in this embodiment, which includes an upper furnace 1, a lower furnace 2, a front furnace arch 3, a rear furnace arch 4 and a plurality of pulverized coal burners 5, The length of the front furnace arch 3 is L 3 , the length of the back furnace arch 4 is L 4 , and L 3 value greater than L 4 The distance between the front wall 6 and the center line 1-1 of the outlet of the cold ash hopper 8 is L 1 , the distance from the rear wall 7 to the center line 1-1 of the outlet of the cold ash bucket 8 is L 2 , and L 1 value greater than L 2 A plurality of pulverized coal burners 5 are installed on the front furnace arch 3 along the furnace width direction, and a plurality of pulverized coal burners 5 are installed on the rear furnace arch 4 along the furnace width direction, the front furnace arch 3, the front wall 6, The front wal...

specific Embodiment approach 2

[0013] Specific implementation mode two: combination figure 1 Describe this embodiment, a W flame boiler with an asymmetric arrangement of furnace arches described in this embodiment, L 1 The value is L 2 The value is 1.5 times to 2 times. Other methods are the same as in the first embodiment.

specific Embodiment approach 3

[0014] Specific implementation mode three: combination figure 1 This embodiment is described. In this embodiment, a W-flame boiler with an asymmetric arrangement of furnace arches, the angle between the front furnace arch 3 and the horizontal plane is equal to the angle between the rear furnace arch 4 and the horizontal plane. Other methods are the same as in the first embodiment.

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Abstract

The invention belongs to the technical field of boiler combustion and relates to a coal powder boiler, in particular to a W flame boiler with asymmetric boiler arches. The W flame boiler aims to solvethe problem that a boiler interior flow field of an existing W flame boiler is inclined. The W flame boiler comprises an upper hearth, a lower hearth, a front boiler arch, a rear boiler arch and a plurality of pulverized coal combustors. The length of the front boiler arch is L3, the length of the rear boiler arch is L4, and the numerical value of L3 is larger than the numerical value of L4. Thedistance between a front wall and the outlet center line of a cold ash bucket is L1, the distance between a rear wall and the outlet center line of the cold ash bucket is L2, and the numerical value of L1 is larger than the numerical value of L2. An area surrounded by the front boiler arch, the front wall, a front wall body of the cold ash bucket, a section from the bottom end of the front wall body of the cold ash bucket to the outlet center line of the cold ash bucket, the outlet center line of the cold ash bucket and a section from the outlet center line of the cold ash bucket to the top end of the front boiler arch is larger than an area surrounded by the rear boiler arch, the rear wall, a rear wall body of the cold ash bucket, a section from the bottom end of the rear wall body of thecold ash bucket to the outlet center line of the cold ash bucket, the outlet center line of the cold ash bucket and a section from the outlet center line of the cold ash bucket to the top end of therear boiler arch.

Description

technical field [0001] The invention relates to a pulverized coal boiler, in particular to a W-flame boiler with asymmetrically arranged furnace arches, belonging to the technical field of boiler combustion. Background technique [0002] my country's low-volatile coal reserves are abundant and widely distributed. When boilers use low volatile coal, there are common problems such as difficulty in ignition, poor combustion stability and low burnout rate. W Flame Boiler is a boiler specially designed for burning low-volatile coal. When the pulverized coal airflow burns in the furnace, it forms a "W"-shaped flame. The time spent in the furnace is conducive to the burnout of low volatile coal. A large number of sanitary combustion belts are laid around the burner, and high-temperature flue gas backflow will be formed under the furnace arch, which can help the pulverized coal flow to catch fire and stabilize combustion. Staged combustion of air in the furnace is beneficial to r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C5/08F23M5/06F23L9/00
Inventor 李争起张鑫闫天舒王青祥陈智超曾令艳
Owner HARBIN INST OF TECH