High-temperature high-pressure recirculating fluidized bed boiler of combusting biomass straws
A technology of circulating fluidized bed and biomass straw, which is applied in the field of mechanical mechanisms of boilers, can solve the problems of poor feeding, insufficient output, and inability to take into account hard straw at the same time, and achieve the effect of smooth feeding
Active Publication Date: 2013-04-24
WUXI HUAGUANG BOILER
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Problems solved by technology
The existing domestic circulating fluidized bed boilers that burn biomass straw generally suffer from poor feed return, insufficient output, and the inability to simultaneously burn hard straw and soft straw
Method used
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[0012] See figure 1 , which includes a drum 1, a furnace 2, a convective evaporation heating surface 3, a superheater, an economizer 4, an air preheater 10, and a smoke exhaust port 21. The drum 1 is installed above the furnace 2, and the flue gas of the furnace 2 Convective evaporation heating surface 3, superheater, economizer 4, air preheater 10, smoke exhaust port 21 are installed in sequence in the direction of flow. The superheater includes low temperature superheater 5, medium temperature superheater 6, high temperature superheater 7, medium temperature superheater The device 6 and the low-temperature superheater 5 are sequentially arranged in the flue gas flow direction of the furnace 2, and the high-temperature superheater 7 is arranged in the inner cavity of the return passage 12;
[0013] A double-screw feeder 13 is externally connected to the bottom side of the furnace 2, and the double-screw feeder 13 leads to the combustion chamber 22 inside the furnace 2. A slag...
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The invention provides a high-temperature high-pressure recirculating fluidized bed boiler of combusting biomass straws, which can combust hard straws and soft straws simultaneously and returns materials smoothly. The high-temperature high-pressure recirculating fluidized bed boiler comprises a drum, a hearth, a convection evaporating heating surface, an overheater, a coal economizer, an air preheater and a smoke outlet, wherein the drum is arranged above the hearth, and the convection evaporating heating surface, the overheater, the coal economizer, the air preheater and the smoke outlet aresequentially arranged in the smoke flowing direction of the hearth. The high-temperature high-pressure recirculating fluidized bed boiler is characterized in that a dual-helical feeding machine is externally connected to the lateral side of the bottom of the hearth and leads to a combustion chamber inside the hearth, a deslagging pipe is arranged at the lower part of the combustion chamber, an under-bed ignition device is externally connected to the downside of the combustion chamber, a vertically-arranged circular steam cooling high-temperature cyclone separator is arranged in the middle of a channel through which the hearth is connected with the convection evaporating heating surface, and a returning channel is communicated to the bottom of the vertically-arranged circular steam cold high-temperature cyclone separator, and is communicated with the combustion chamber of the hearth.
Description
technical field [0001] The invention relates to the technical field of boiler mechanical mechanisms, in particular to a high-temperature and high-pressure circulating fluidized bed boiler burning biomass straw. Background technique [0002] Straw (cotton stalks, tree branches, corn stalks, wheat stalks, etc.) is the waste of agricultural production, allowing it to be burned in the field not only wastes precious resources, but also pollutes the atmospheric environment. Straw is a kind of biomass fuel and a renewable energy source. Making full use of straw incineration to generate electricity has the social benefits of saving energy and preventing environmental pollution, as well as good economic benefits. The existing domestic circulating fluidized bed boilers that burn biomass straw generally suffer from poor feeding, insufficient output, and the inability to simultaneously burn hard straw and soft straw. Contents of the invention [0003] In view of the above problem...
Claims
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IPC IPC(8): F23C10/02F23C10/18F23C10/20
Inventor 唐国勇
Owner WUXI HUAGUANG BOILER