Biomass smoke-free combustion furnace

Abstract

The invention relates to heat supply equipment, in particular to a biomass smoke-free combustion furnace. The biomass smoke-free combustion furnace is characterized in that a fuel conveying pipe (5) is connected above one section, outside a furnace body (1), of an air feeding pipe (7), a negative-pressure port (8) is formed at the upper side of one section of the air feeding pipe (7) entering a hearth (2), a wind pressing piece (11) which is bent obliquely towards the rear lower direction is arranged at the front edge of the negative-pressure port (8), the inner wall of the hearth (2) is a circular arch-shaped curved surface formed by a plurality of circular arch-shaped surfaces in a smooth connection mode, a settler (3) is arranged at one side of the hearth (2) above the air feeding pipe (7), the upper portion of the settler (3) is a circular arc box body, the lower portion of the settler (3) is a conical pipe, the lower end port of the conical pipe faces the negative-pressure port (8) of the air feeding pipe (7), a suction port (13) is arranged at the outer side of the settler (3), an opening at the inner side is connected with an air guide pipe (4), and the other end of the air guide pipe (4) is connected with an air inlet of a draught fan (6). The biomass smoke-free combustion furnace has the advantages that combustion air is hot air in the hearth, the temperature of the furnace is not lowered, fuel rotates and flies up and down and is not accumulated easily, the unburnt fuel is sucked to the air feeding pipe and is sprayed out again for combustion, and the heat of the furnace is accumulated continuously and reaches or approaches the heat of compressed straws or coal.

Description

technical field [0001] The invention relates to a heating device, namely a biomass smokeless combustion furnace. Background technique [0002] Biomass fuels such as crop straws, weeds, and wood chips are large in quantity and cheap, and are valuable thermal energy resources. If they are used in industrial production and large-scale heating, they can save energy by replacing mineral fuels such as coal and fuel oil. Protecting the environment, solving the problem of straw disposal in rural areas, and increasing farmers' income all play an important role. However, because the ignition point of biomass is very low, generally only 300-500°C, it cannot meet the needs of industrial production or central heating boilers. In addition, due to the low combustion temperature, many combustible materials with high ignition points in straw cannot be burned, and will be discharged with smoke and dust, which will have a negative impact on the environment. In order to solve this problem, pe...

AI Technical Summary

Problems solved by technology

Existing stoves lack the heat accumulation structure, and use cold air to support combustion, which offsets part of the heat. In addition, the fuel itself has a small porosity and insufficient oxygen supply, resulting in uneven and insufficient combustion, increasing the residue of ash, and further clogging gap, so the temperature can only stay near the ignition point

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