Dust-accumulation-preventing natural circulation fluidized bed boiler

A fluidized bed boiler and natural circulation technology, applied in the field of boilers, can solve the problems of low efficiency, reduced heat exchange efficiency, loss of heat exchange function, etc., and achieve the possibility of increasing heat exchange efficiency, large degrees of freedom, and reducing interference Effect

Active Publication Date: 2017-12-01
平湖弘欣热电有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Fine ash particles will stick to heat exchange components such as high temperature superheater, reheater, low temperature superheater, economizer, air preheater, etc. The thermal efficiency is greatly reduced, or even loses the heat exchange function, and the efficiency is low

Method used

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  • Dust-accumulation-preventing natural circulation fluidized bed boiler
  • Dust-accumulation-preventing natural circulation fluidized bed boiler
  • Dust-accumulation-preventing natural circulation fluidized bed boiler

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Embodiment Construction

[0032] refer to Figure 1 to Figure 4 The present invention will be further described.

[0033] like figure 1 and figure 2 As shown, an anti-ashing natural circulating fluidized bed boiler includes a furnace 1, a drum 2 is installed above the furnace 1, and a feeder 3 and a blanking pipe 4 are externally connected to the bottom side of the furnace 1. The feeder 3. The blanking pipe 4 leads to the combustion chamber 5 at the lower part of the furnace chamber 1. The lower part of the combustion chamber 5 is arranged with a slag discharge pipe 6, an ignition device 7 is arranged under the combustion chamber 5, and a cyclone separator is arranged vertically on the right side of the furnace chamber 1. 8. A vertical shaft 9 is arranged on the right side of the cyclone separator 8, an economizer 10 is arranged above the shaft 9, the economizers 10 are arranged in series, and the economizer 10 is a membrane type economizer 10, The outer side of the economizer 10 is fixedly connect...

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Abstract

The invention discloses a dust-accumulation-preventing natural circulation fluidized bed boiler. The problem that an existing boiler is low in heat exchange efficiency is solved. According to the technical scheme, the dust-accumulation-preventing natural circulation fluidized bed boiler comprises a hearth, a cyclone separator and a vertical shaft; a boiler barrel is installed on the upper portion of the hearth; the cyclone separator is connected with the hearth; coal economizers and air preheaters are arranged inside the vertical shaft; a plurality of sweeping blocks sliding up and down are arranged inside the vertical shaft and fixedly connected with metal brushes used for sweeping; the sweeping blocks slide up and down to penetrate through the coal economizers; and the largest outer diameter of the sweeping blocks is smaller than the size of the gap between the adjacent coal economizers. Through arrangement of the sweeping blocks sliding up and down, the possibility of dust adhering to the economizers is reduced, and the heat exchange efficiency of equipment is improved.

Description

technical field [0001] The invention relates to the technical field of boilers, and more particularly, to a natural circulating fluidized bed boiler for preventing fouling. Background technique [0002] The circulating fluidized bed boiler adopts a single drum, natural circulation mode, and is generally divided into two vertical shafts at the front and the rear. The circulating fluidized bed boiler mainly burns low-quality fuel with high ash content. After the coal is burned in the furnace, the flue gas carries a large number of ash particles to the upper part of the furnace. The finer ash particles cannot be captured by the separator and escape, and the flue gas goes to the tail shaft. The tail shaft is equipped with high temperature superheater, reheater, low temperature superheater, economizer, air preheater, etc. part. [0003] At present, the Chinese Patent Publication No. CN103453521B discloses a circulating fluidized bed boiler for burning palm slag, which includes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/00F23C10/18F22D1/00F23J15/00
CPCF22D1/00F23C10/00F23C10/18F23J15/00
Inventor 陶卫中
Owner 平湖弘欣热电有限公司
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