Circulating fluidized bed boiler air hood

A circulating fluidized bed and wind cap technology, applied in the field of boiler wind caps, can solve the problems of wind cap wear and air outlet dust particles clogging in the air outlet, and achieve the effects of avoiding wear, reducing wear and prolonging service life

Inactive Publication Date: 2011-02-16
HARBIN HAGUO BOILER ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the air outlet of the existing boiler air cap is easily blocked by larger dust particles in the air outlet and easily cause the air cap to wear, and then provides a circulating fluidized bed boiler air cap

Method used

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  • Circulating fluidized bed boiler air hood
  • Circulating fluidized bed boiler air hood
  • Circulating fluidized bed boiler air hood

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0007] Specific implementation mode one: as Figure 1~3 As shown, the air cap of the circulating fluidized bed boiler in this embodiment includes an air cap cover 1 and an air inlet pipe 2, and the boiler air cap also includes an anti-wear sleeve 3, and the anti-wear sleeve 3 is set on the upper part of the air inlet pipe 2 , the lower end of the hood cover 1 is set on the wear-resistant sleeve 3, and the lower end of the hood cover 1 is airtightly connected with the wear-resistant sleeve 3, and the outer wall of the hood cover 1 and the air inlet pipe 2 and the wear-resistant sleeve 3 There is an air channel 4 between them, and the lower side wall of the hood cover 1 is uniformly processed with a plurality of oblique holes 1-1 communicating with the air channel 4 along the circumferential direction, and each slanted hole 1-1 is connected with the hood cover 1. The highest point of the intersecting line formed by the inner surface is higher than the highest point of the inters...

specific Embodiment approach 2

[0008] Specific implementation mode two: as Figure 1~2 As shown, the included angle α between the axis of the inclined hole 1 - 1 in this embodiment and the horizontal direction is 15°. Such a design can reduce the probability of larger dust particles clogging the holes, and at the same time prevent the airflow from scouring the adjacent air caps, reducing the wear of the air caps. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0009] Specific implementation mode three: as image 3 As shown, the number of inclined holes 1-1 in this embodiment is three to four. Other compositions and connections are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a circulating fluidized bed boiler air hood, relating to a boiler air hood. The invention solves the problems that the air outlet of the existing boiler air hood is easy to be blocked by larger dust particle and air hood is easy to be abrased. The anti-abrasion sleeve is sheathed on the upper part of an air inlet pipe, the lower end of the air hood outer cover is sheathed on the anti-abrasion sleeve, and the lower end of the air hood outer cover is hermitically connected with the anti-abrasion sleeve, air flue is formed between the air hood outer cover and the air inlet pipe as well as between the air hood outer cover and the outer wall of anti-abrasion sleeve, the lower side wall of the air hood outer cover is uniformly distributed with a plurality of inclined holes communicated with the air flue along the peripheral direction, and the peak of intersecting line formed by each inclined hole and the inner surface of the air hood outer cover is higher than the peak of intersection line formed by each inclined hole and the outer surface of the air hood outer cover. The boiler air hood of the invention is processed with inclined air outlets, the probability that larger dust particle is blocked in air outlet is greatly reduced, meanwhile the phenomenon that air current washes adjacent air hood is avoided, and abrasion of air hood is reduced.

Description

technical field [0001] The invention relates to a boiler air cap, in particular to an air cap used on a circulating fluidized bed boiler. Background technique [0002] The boiler air cap is a part of the boiler air distribution device. The air distribution device is an important part of the circulating fluidized bed boiler. The function of the air distribution device is to make the air evenly enter the bottom section of the boiling section to ensure that the temperature of the fuel is in a good boiling state. of burning. The air distribution device consists of an air distribution plate and a boiler hood. The hoods are mushroom-shaped, cylindrical, spherical and umbrella-shaped. The most widely used type in our country is the mushroom hood. Existing boiler hood outer cover is processed with air outlet holes along the horizontal direction, resulting in larger ash particles being blocked in the air outlet holes, and the airflow from the air outlet holes is easy to scour the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/20
Inventor 孙军丛日旭韩晓刚王坤
Owner HARBIN HAGUO BOILER ENG TECH
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