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: 2010-05-12
SHANGHAI BOILER WORKS
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[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
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[0025] Such as figure 2 As shown, 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 staged fueling of the circulating fluidized bed boiler, The method of staged air supply and staged combustion is as follows:
[0026] Step 1. Arrange the first air distribution plate 1, the second air distribution plate 2 and the third air distribution plate 3 at the furnace bottom of the boiler furnace 4, and the first air distribution plate 1 is arranged at the bottom of the boiler furnace 4, as the lower For the air distribution board layer, the second air distribution board 2 and the third air distribution board 3 are symmetrically arranged on both sides of the upper part of the first air distribution board 1, and communicate with both sides of the first air distribution board...
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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 With the increase and improvement of parameters, the area of the air distribution plate at the bottom of the furnace increases, and the difficulty of air distribution uniformity increases. In order to solve the problem of...
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IPC IPC(8): F23C10/20F23C10/02
Inventor 肖峰高子瑜
Owner SHANGHAI BOILER WORKS