Multi-directional air distribution fixed bed biomass gasification stoves

Abstract

The invention discloses a multi-ventilation fixed bed biomass gasification furnace, which comprises a furnace body and a fire gate, wherein the fire gate is arranged in the middle part of the furnace body; the furnace body is provided with a forced air intake system which comprises an air feed mechanism, a ventilation device and a connecting pipe; the ventilation device is a ventilation pipeline which is positioned above the fire gate in the furnace body and is used for inletting air from a plurality of directions; and the air feed mechanism is positioned outside the furnace body and is connected with the ventilation pipeline through the connecting pipe which penetrates through the furnace wall so as to provide a forced air supply for the inside of the furnace. The multi-ventilation fixed bed biomass gasification furnace adopts a forced air feed mode that the air feed mechanism is combined with the ventilation device to feed air; and compared with the prior normal pressure air feed mode, the multi-ventilation fixed bed biomass gasification furnace improves the power of the gasification furnace, reduces the tar content in fuel gas, greatly reduces the tar content in waste water, and is advantageous for environmental protection; besides, the multi-ventilation fixed bed biomass gasification furnace does not have specific requirements on the dimension, the dryness, the feeding mode and the like of biomass raw materials, thereby widening the application range of the biomass raw materials.

Description

technical field [0001] The invention relates to a biomass gasification furnace, in particular to a multi-air distribution fixed-bed biomass gasification furnace. Background technique [0002] Biomass, coal and other hydrocarbons are the most important type of storable energy produced directly or indirectly through photosynthesis on the earth, especially biomass energy. One of the most worthy of development and utilization of renewable energy. [0003] Gasification is one of the important methods for conversion and utilization of biomass energy and coal. The fixed-bed gasifier is the type of gasifier that has the lowest requirements on the characteristics of raw materials containing hydrocarbons. However, the existing fixed-bed biomass gasification Since the furnace adopts the normal pressure air intake method, it has the following defects: [0004] (1) The amount of gas and oxygen in the gasifier is insufficient, and the air distribution is very uneven. It is impossible to...

AI Technical Summary

Problems solved by technology

[0004] (1) The amount of gas and oxygen in the gasifier is insufficient, and the air distribution is very uneven. It is impossible to increase the power of the gasifier by increasing the amount of raw materials participating in the reaction. Therefore, the power of the atmospheric pressure fixed-bed biomass gasifier Generally less than 300KW, the efficiency is low, and the furnace body of the gasifier is very large, and there is a safety hazard of external fire;

[0005] (2) Since the gasification process of the raw material is gasification at low temperature under normal pressure, the reaction is insufficient and the strength is not high, resulting in a large amount of tar, which is easily mixed with the biomass dust in the gas to form a solid lump of tar, resulting in The pipeline is blocked or the equipment is damaged; in addition, when the gas is cooled down, a large amount of sewage containing tar will be produced, which is difficult to purify and reuse, so it is not conducive to environmental protection;

[0006] (3) Due to the defects of low power, insufficient oxygen supply and high tar content in existing gasifiers, the requirements for raw materials of gasifiers are also increased accordingly. Generally, the raw materials have the following requirements: raw materials are small in size, dry, and easy to process. It is not easy to build a bridge after the materials and raw materials enter the furnace body, so the practicability of the gasifier is poor, and the above requirements have also caused great restrictions on the wide utilization of biomass energy.

Images