Furnace body of a biomass gasifier with fuel fed from bottom to top

Abstract

The invention discloses an upward-fuel-feeding biomass gasification furnace shaft which comprises a furnace hole, a hearth upper part, a hearth body, a hearth bottom and a hearth feed port arranged on the hearth bottom, wherein an upward-feeding feed channel is divided into a feed pipe (10) and a feed barrel (33); the upper part of the feed barrel (33) and the lower part of the feed pipe (10) form a slip connection; the feeding adopts a transverse-upward motion mode; and the upper body of the feed pipe (10) or the whole body of the feed pipe (10) is in a flared shape with a bigger top and a smaller bottom. The feed channel is open to reduce the feed resistance. The cracking and combustion channel is tightening type to increase the collection of gas. The caloric content of the fuel of the reduction layer per unit volume is enhanced to ensure the carbon dioxide to be reduced into combustible carbon monoxide.

Description

technical field [0001] The invention belongs to a domestic stove or stove with solid fuel, and relates to a biomass gasification furnace in which biomass fuel is cracked into combustible gas at high temperature. In particular, it relates to a biomass gasification furnace body in which fuel is fed from bottom to top. Background technique [0002] The upper part of the furnace body of the current biomass gasifier and the furnace feed pipe generally adopt a straight cylinder structure. The disadvantage of the straight cylinder furnace feed pipe is that the friction between the fuel and the wall of the feed cylinder is relatively large. At the same time, Due to the high temperature of the furnace, the moisture volatilized by the high-temperature fuel is absorbed by the low-temperature fuel in the feeding barrel, causing the fuel to expand and increase the feeding resistance; The thickness of the fuel in the barrel gradually becomes thinner, the resistance of the fuel to the win...

AI Technical Summary

Problems solved by technology

[0002] The upper part of the furnace body of the current biomass gasifier and the furnace feed pipe generally adopt a straight cylinder structure. The disadvantage of the straight cylinder furnace feed pipe is that the friction between the fuel and the wall of the feed cylinder is relatively large. At the same time, Due to the high temperature of the furnace, the moisture volatilized by the high-temperature fuel is absorbed by the low-temperature fuel in the feeding barrel, causing the fuel to expand and increase the feeding resistance; The thickness of the fuel in the barrel gradually becomes thinner, the resistance of the fuel to the wind becomes smaller, and the air volume entering the furnace becomes larger, which directly affects the gasification state of the fuel in the furnace

On the other hand, the upper part of the furnace is straight, that is, the whole furnace is straight, which is not conducive to the collection of gas after the gasifier produces gas. Therefore, the firepower is not concentrated enough during combustion.

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