Biomass combustion power generation boiler

Abstract

The invention discloses a biomass combustion power generation boiler, which comprises a boiler wall, a boiler grate, a steam overheater, a material inlet, a slag outlet, a front cover, a water cooling wall, a steam bag, a flow guide cover, an auxiliary flow guide cover and the like, wherein the boiler hearth is separated into a combustion chamber and a heat transfer chamber by the front cover and the flow guide cover, and biomass is centrally combusted in the combustion chamber under the area surrounded by the front cover and the flow guide cover. Compared with the prior art, the biomass combustion power generation boiler has the advantages that the biomass is centrally combusted in the area surrounded by the front cover and the flow guide cover, so the volume heat load of the combustion area is large; the turbulence of smoke in the combustion area is improved by the flow guide cover, the delivered biomass can be sufficiently and completely dried, the combustion is complete, and the combustion efficiency is high; the smoke flowing direction is turned by the flow guide cover, and the combustion dust is furthest settled in the combustion area by the centrifugal force of air flow, so the discharge amount of boiler pollutants is less.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a biomass burning boiler for power generation. Background technique [0002] The following disadvantages exist in the combustion process of traditional biomass burning boilers: [0003] (1) Biomass fuel contains a lot of water, which requires higher drying temperature and longer drying time, but it is actually difficult to meet this condition and has already entered the combustion zone, resulting in incomplete combustion of biomass fuel; [0004] (2) The calorific value of biomass fuel is only 50% of that of coal on average, so the temperature level in the furnace is low, the combustion efficiency is low, and the problem of extinguishing is prone to occur when the furnace is shut down for a long time. [0005] (3) The volatile matter is high and the ignition temperature is low. At 250-350°C, a large amount of volatile matter will precipitate and start to burn violently. Combusti...

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Problems solved by technology

[0008] In order to overcome the shortcomings of the above-mentioned biomass combustion boilers, the present invention discloses a high-efficiency biomass combustion power generation boiler to solve the problems of unstable combustion of biomass fuel, low combustion efficiency, and high concentration of smoke and dust emissions.

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