Internal combustion heating rotation conical biomass gasification furnace

Abstract

The invention provides an internal combustion heating rotation conical biomass gasification furnace which is characterized in that the furnace body is internally provided with two concentric cones, wherein the external cone is a rotation cone and the internal cone is a fixed cone; the top of the rotation cone is connected with a material cylinder at the lower section; the top of the fixed cone is communicated with a smoke gas pipeline; the bottom end surface of the fixed cone is closed and the lower part thereof is tangentially connected with a combustion pipeline; the side wall of the furnace body is arranged as jacket structure; the jacket comprises a high-temperature resistance furnace wall, a combustion gas pipeline, a heat preservation layer and an external wall of the gasification furnace sequentially from inside to outside; the airflow passage in which the combustion gas is led out from the gasification furnace is that the combustion gas is led to the bottom port of the combustion gas pipeline from the bottom of the gasification furnace along the inclined surface of the conical furnace bottom; the delivery outlet of the combustion gas is arranged at the upper part of the combustion gas passage; and a gas transmission pipeline connected on the delivery outlet of the combustion gas outside the gasification furnace is connected with a gas storage cabinet by an induced draft fan. The gasification furnace greatly improves the biomass gasification rate and the heat value of the combustion gas.

Description

technical field [0001] The invention relates to a gasification device, more specifically a gasification furnace using biomass as raw material. Background technique [0002] Biomass includes forestry materials, agricultural waste, municipal waste and livestock manure, etc. Biomass is a kind of renewable energy with abundant reserves, which can be used as an alternative energy source to achieve CO 2 Zero emission, and the low content of S and N in it can greatly reduce the greenhouse effect and environmental pollution. [0003] At present, the main problems in biomass gasification technology and gas utilization process are: first, the calorific value of gas is low. Due to the direct introduction of more air in the process of biomass gasification, the nitrogen content in gas exceeds 55%, and the heat of gas The value is generally lower than 7000KJ / m 3 The second is that the gasification process produces more tar. Due to the introduction of more cold air during the gasificati...

AI Technical Summary

Problems solved by technology

[0003] At present, the main problems in biomass gasification technology and gas utilization process are: first, the calorific value of gas is low. Due to the direct introduction of more air in the process of biomass gasification, the nitrogen content in gas exceeds 55%, and the heat of gas The value is generally lower than 7000KJ / m 3 The second is that the gasification process produces more tar. Due to the introduction of more cold air during the gasification process, the temperature in the gasifier is not high enough, resulting in a high tar yield, which not only affects the normal operation of the gasifier and the transmission of gas , storage and utilization, and waste a lot of energy and resources; third, the residual carbon content of tailings after biomass pyrolysis is still high, which not only costs high for treatment and disposal, but also causes waste of resources

Although this invention increases the temperature of the catalyst bed and improves the tar cracking rate, a large amount of cold air passes through the catalyst bed, which affects the catalytic cracking effect of tar; when the gas containing tar passes through the blower, tar condensation and adhesion will occur, affecting the normal operation of the blower ;The cold air directly enters the gasifier, so that the temperature in the combustion zone is not high, the pyrolysis gas has not been cracked at high temperature, and the tar yield is relatively high; the device is more complicated and the practicability is poor

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