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Arranging method of layered fluidization air distribution plate of fluidized bed boiler

A technology of fluidized bed boiler and layout method, which is applied to fluidized bed combustion equipment, combustion method, fuel burned in molten state, etc., can solve the complex design and manufacture of furnace water wall, difficult to control the bed pressure balance, and affect the safe operation of the boiler. and other problems, to achieve the effect of improving combustion efficiency and pollutant control ability, improving mixed working conditions, and reducing wear and tear

Active Publication Date: 2007-04-18
SHANGHAI BOILER WORKS
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Problems solved by technology

[0003] However, the design and manufacture of the water-cooled wall of the furnace is complicated for this kind of "pants" double furnace structure. At the same time, because the furnace is divided into two separate controls, it is difficult to control the bed pressure balance of the furnace on both sides during the start-up and operation of the boiler, which sometimes causes bed materials to escape. The phenomenon of turning over the bed seriously affects the safe operation of the boiler

Method used

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  • Arranging method of layered fluidization air distribution plate of fluidized bed boiler
  • Arranging method of layered fluidization air distribution plate of fluidized bed boiler

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Embodiment

[0025] As shown in Figure 2, it is a schematic diagram of the arrangement method of the stratified fluidized air distribution plate of the fluidized bed boiler. A method of arranging the air distribution plate at the bottom of the fluidized bed boiler adopts a layered arrangement to realize the classification of the circulating fluidized bed boiler The method of adding fuel, staged air supply and staged combustion is as follows:

[0026] Step 1. Install three air distribution panels 1, 2 and 3 at the bottom of the boiler furnace 4. The air distribution panel 1 is installed at the bottom of the boiler furnace 4, which is an inverted trapezoidal or rectangular lower air distribution panel layer. , install the air distribution plate 2 and the air distribution plate 3 symmetrically on both sides of the upper part of the air distribution plate 1, and communicate with the two sides of the air distribution plate 1 to form an inverted trapezoidal upper air distribution plate layer, the...

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Abstract

The invention adopts a multi-layer arrangement method of a fluidized-bed boiler bottom air-feeding plates and the integral hearth bottom consists of three independent air-feeding plates. One air-feeding plate is disposed in the lowerest part of the hearth and on the above air-feeding plate are overlaid the other air-feeding plates, so as to realize the step charging, the step air-supply and the fractional combustion of the recirculating fluidized-bed boiler. By regulating the blast volume and the fuel flow of each air-feeding plate, the uniform combustion and air-supply of the boiler can be realizer.

Description

technical field [0001] The invention relates to a method for arranging stratified fluidized air distribution plates of a fluidized bed boiler, which is used for stratified air distribution, stratified fluidization and stratified combustion of a circulating fluidized bed, and belongs to the technical field of circulating fluidized bed boiler fluidization . Background technique [0002] With the continuous development of circulating fluidized bed boilers in the direction of large-scale and high-parameterization, the cross-sectional area of ​​the furnace is getting larger and larger. Because the depth of the furnace is limited by the penetration capacity of the secondary air, it cannot be increased proportionally. At the same time, due to the boiler capacity Increase and parameter improvement, increase the area of ​​the air distribution plate at the bottom of the furnace, and increase the difficulty of air distribution uniformity. In order to solve the problem of increasing the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/20F23C10/02
Inventor 肖峰高子瑜
Owner SHANGHAI BOILER WORKS
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