Gasifying method and vertical air inlet device of biomass gasifier

Abstract

The invention discloses a gasifying method and a vertical air inlet device of a biomass gasifier. Burning zones are formed at the fuel bottom in a layered manner, the air inlet device is separated into two layers, an ignition device is used for igniting at first to form high and low burning zones, the low burning zone is a high-temperature zone which generates carbon dioxide, the high burning zone is a reduction zone, and carbon dioxide and carbon which is scorched through the reduction zone are contacted with each other to carry out reduction reaction, so that combustible gas-carbon monoxide is generated; and all the air outlet pipes (3) are uniformly erected on the periphery of a feed port (4) in a hearth (2) to be annularly distributed and are classified into two kinds of long air outlet pipes and short air outlet pipes, and the long air outlet pipes and the short air outlet pipes are distributed adjacently. The biomass gasifier gasifies stably, and the air field and the air pressure are uniform through adjacently distributing the long air outlet pipes and the short air outlet pipes, so that two layers of burning can be realized in the hearth; the burning is uniform, and thus, the hearth temperature can be conveniently controlled between 600 DEG C and 650 DEG C; and a blowdown pipe, a blowdown valve and a drain outlet are designed, so that the air flue blockage prevention is benefited.

Description

technical field [0001] The invention belongs to household stoves or stoves with solid fuels, and relates to a biomass gasification furnace gasification method and a vertical air inlet device. 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. Therefore, the prior art scheme also needs to be furthe...

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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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