Circulating fluidized bed boiler

A circulating fluidized bed and boiler technology, which is applied in the field of mechanical equipment, can solve the problems of affecting the air supply of the return material, over-temperature coking of the return material device, and wear of the air cap, so as to solve the wear of the air cap, stabilize the operation of the return material, and solve the problems of the air chamber The effect of pouring gray

Inactive Publication Date: 2015-01-28
SHAANXI QIYUAN TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing circulating fluidized bed boilers often suffer from wear and tear of the wind cap and severe ash pouring in the air chamber, and are prone to bending and deformation under high-temperature operation, resulting in poor reliability; the return air

Method used

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  • Circulating fluidized bed boiler

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Example Embodiment

[0011] The circulating fluidized bed boiler of the present invention includes a furnace chamber 1, a return device 2, and a combustion chamber 3, a cyclone separator 4, and a tail flue arranged in sequence from front to back. The furnace 1 is a fully suspended water-cooled wall with air distribution on the water-cooled wall The hood 5 is evenly arranged on the board, and a high-temperature superheater is suspended above the tail flue; the low-temperature superheater, economizer 7, and air preheater 8 are supporting structures; the boiler adopts an all-steel frame structure with a total of Four rows of columns are provided. The hood 5 is changed to a small bell-type hood. The upper end of the hood is connected with a hood head through a jacket. An inner tube core is arranged in the hood. The labyrinth structure completely solves the problem of slagging. The small hole diameter greatly reduces the wear of the hood head. The setting of the jacket completely avoids the wear of the i...

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Abstract

The invention relates to a circulating fluidized bed boiler, belongs to the field of mechanized equipment, and particularly relates to a circulating fluidized bed boiler. The circulating fluidized bed boiler comprises a boiler chamber and a returning charge device and is successively provided with a combustion chamber, a cyclone separator and a rear smoke channel from front to back, wherein the hearth is a full-suspended water wall; an air distribution plate of the water wall is uniformly provided with an air cap; a high-temperature superheater is suspended above the rear smoke channel; a low-temperature superheater, a coal economizer and an air preheater are of support structures; the boiler is of an all-steel frame structure; and four rows of stand columns are arranged backward in front of the boiler. The circulating fluidized bed boiler is characterized in that the air cap is changed to be a small bell jar type air cap; and the upper end of the air cap is connected with an air cap head through a clamp cover. The circulating fluidized bed boiler is reasonable in structure and easy in replacing of the air cap, completely solves the problems of air cap abrasion and air chamber ash, is stable in air feeding and returning charge operation, and can ensure stable operation of the whole combustion system.

Description

technical field [0001] The invention relates to the field of mechanical equipment, in particular to a circulating fluidized bed boiler. technical background [0002] As a new generation of clean coal technology, circulating fluidized bed combustion technology has been widely used in the world. The low-temperature combustion characteristics of circulating fluidized bed boilers allow the desulfurization process to be carried out in the combustion zone. The furnace of circulating fluidized bed boiler contains a large amount of materials. During the combustion process, a large amount of materials are carried to the upper part of the furnace by the flue gas. After passing through the separator arranged at the outlet of the furnace, the materials are separated from the flue gas and passed through the non-mechanical return valve. The material is returned to the bed to realize multiple cycle combustion. Due to the high material concentration, large heat capacity and good material ...

Claims

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Application Information

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IPC IPC(8): F23C10/02F23C10/20F23C10/26
CPCF23C10/10F23C10/20F23J3/026
Inventor 张淑芬
Owner SHAANXI QIYUAN TECH DEV
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