Internal-combustion heating type biomass gasification furnace

Abstract

The present invention relates to an internal combustion heated biomass gasification furnace. Its structure is characterized by that it adopts a cylindrical furnace body, in the furnace body interior a coiled internal combustion pipe is set, the internal combustion pipe inlet is positioned in the lower portion of said cylindrical furnace body, and its outlet is extended to the exterior of furnace body from the top portion of cylindrical furnace body, its igniter is positioned in the internal combustion pipe inlet; over the cylindrical furnace body a helical feeding mechanism is set, its helical feeding hole is positioned on the eccentric position of cylindrical furnace body top portion, on the centre axis position of said cylindrical furnace body a stirring shaft with stirring blades is set, on the inside wall of cylindrical furnace body several layers of baffle plates are set, the combustion-supporting air inlet is set in the top portion of said cylindrical furnace body, and the gas outlet in the furnace body is positioned in the lower portion of said furnace body.

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 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 / kg; the second is that more tar is produced during the gasification process. 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 yiel...

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 / kg; the second is that more tar is produced during the gasification process. 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 gasifier The normal work and the transmission, storage and utilization of gas, and waste a lot of energy and resources; third, the residual carbon content of the tailings after biomass pyrolysis is still high, not only the treatment and disposal costs are high, but also cause 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. Operation; 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 high; the device is more complicated and less practical

Images