Internally-circulating flowing choking and buffering type biomass circulating fluidized bed
A circulating fluidized bed, biomass technology, applied in the field of boilers, can solve the problems of coking and ash accumulation, large material consumption, low load, etc., and achieve the effect of full combustion and high efficiency
Inactive Publication Date: 2016-10-26
广东粤电湛江生物质发电有限公司
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Problems solved by technology
[0002] The existing material circulating fluidized bed has the defects of insufficient combustion and serious coking and ash accumulation in the rear shaft
[0003] Especially in the subtropical monsoon climate area, the area has abundant rainfall, and there are many types of fuel in the area with high moisture content. The long-term burning of biomass fuel with >45% moisture content occurs during the operation of the #2 unit boiler: it is difficult for the unit to load and the load is low, and evaporation replaces Low thermal efficiency, low boiler efficiency and large material consumption; difficult combustion and serious rearward movement, high carbon content in fly ash, serious coking and ash accumulation in the rear shaft
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[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. And the features in the embodiments can be combined with each other.
[0025] Such as figure 1 As shown, the internal circulation choke buffer type biomass circulating fluidized bed includes a boiler body 1, and a ring-shaped choke buffer block 2 is provided on the inner wall of the boiler body 1 along the circumference, and the ring-shaped choke buffer block 2 There are 6 expansion joints arranged at intervals of 1 to 3 meters along the circumferential direction of the ring-shaped flow-blocking buffer block, and the expansion joints are filled with porcelain fiber insulation materials with δ=4mm; The annular blocking buffer block is made of chrome corundum refractory material. Six annular choke buffer blocks 2 are distrib...
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The invention discloses an internally-circulating flowing choking and buffering type biomass circulating fluidized bed. The internally-circulating flowing choking and buffering type biomass circulating fluidized bed comprises a boiler body. A ring of annular-shaped flowing choking and buffering blocks are arranged on the inner wall of the boiler body along the circumferential direction. A plurality of annular-shaped flowing choking and buffering blocks are arranged and the plurality of annular-shaped flowing choking and buffering blocks are distributed at intervals along the inner wall of the boiler body from bottom to top. Pins are welded on the inner wall of the boiler body and the annular-shaped flowing choking and buffering blocks are fixed on the inner wall of the boiler body by the pins. According to the fluidized bed, the plurality of annular-shaped flowing choking and buffering blocks are added in the boiler body, so that the problems such as low unit load, low evaporation heat transfer efficiency, low boiler efficiency, high material consumption, difficult combustion, serious backward movement, high carbon content of flying ash and serious coking and ash deposition of a rear shaft can be solved. The fluidized bed has the characteristics of being full in combustion, capable of energy conservation and high in efficiency.
Description
technical field [0001] The invention relates to a boiler, in particular to a biomass circulating fluidized bed. Background technique [0002] The existing material circulating fluidized bed has the defects of insufficient combustion and serious coking and ash accumulation in the rear shaft. [0003] Especially in the subtropical monsoon climate area, the area has abundant rainfall, and there are many types of fuel in the area with high moisture content. The long-term burning of biomass fuel with >45% moisture content occurs during the operation of the #2 unit boiler: it is difficult for the unit to load and the load is low, and evaporation replaces The thermal efficiency is low, the boiler efficiency is low, and the material consumption is large; the combustion is difficult to move backward, the carbon content of the fly ash is high, and the coking and ash accumulation in the rear shaft is serious. Contents of the invention [0004] In order to overcome the above disad...
Claims
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IPC IPC(8): F23C10/18
CPCF23C10/18F23C2206/10
Inventor 黄家崧黄聪陈伟陈洪世何荣毕武林李俊超李定青陈镜全林太有
Owner 广东粤电湛江生物质发电有限公司