Bidirectional air intake device of biomass gasifier

Abstract

The invention discloses a bidirectional air intake device of a biomass gasifier. The bidirectional air intake device comprises a ventilation door (6), upper air passages (13) and lower air passages (5), wherein the upper air passages (13) are annularly distributed at the periphery of an outlet passage of a fuel gas outlet (10); the lower air passages (5) are annularly distributed at the periphery of an inlet passage of a feed inlet (4); the upper air passages (13) face downwards to be communicated with upper air ducts (12); the lower air passages (5) face upwards to be communicated with lower air ducts (3); the upper air ducts (12) and the lower air passages (5) are located at upper and lower positions inside a hearth (2); a plurality of upper air ducts (12) are vertically and annularly and cylindrically distributed at the periphery of the fuel gas outlet (10); a plurality of lower air ducts (3) are slantwise and annularly distributed at the periphery of the feed inlet (4) in a circular truncated cone shape; and air outlets of the upper air ducts (12) and the lower air ducts (3) are respectively formed at a duct orifice. Uniform wind field, wind pressure and combustion of the bidirectional air intake device can be realized by distributing the upper air ducts and the lower air ducts in upper and lower layers, thereby favorably controlling the temperature of the hearth between 600 DEG C and 650 DEG C.

Description

technical field [0001] The invention belongs to household stoves or stoves with solid fuels, and relates to a forward and reverse bidirectional air intake device for a biomass gasification furnace. Background technique [0002] At present, the fixed-bed biomass gasifier blasts the fuel through the furnace bridge or the furnace wall air inlet, which will cause uneven wind field and wind pressure in the furnace. If the furnace is to work normally, the local temperature of the furnace will exceed 800 degrees, which is easy to generate slagging (The fuel slagging temperature is generally 680 degrees), because slagging will affect the ventilation performance of the furnace, so that the gasifier cannot work continuously for a long time. Therefore, a device that can control the furnace temperature between 600°C and 650°C and have a uniform wind field and wind pressure is needed to solve the slagging problem of the biomass gasifier. [0003] In order to solve this problem, the appl...

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Problems solved by technology

[0002] At present, the fixed-bed biomass gasifier blasts the fuel through the furnace bridge or the furnace wall air inlet, which will cause uneven wind field and wind pressure in the furnace. If the furnace is to work normally, the local temperature of the furnace will exceed 800 degrees, which is easy to generate slagging (The fuel slagging temperature is generally 680 degrees), because slagging will affect the ventilation performance of the furnace, so that the gasifier cannot work continuously for a long time

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