Garbage pyrolysis gasification furnace capable of catalyzing circulation of pyrolysis flue gas and working method of garbage pyrolysis gasification furnace

Abstract

The present invention relates to a garbage pyrolysis gasification furnace capable of catalyzing circulation of pyrolysis flue gas and a working method of the garbage pyrolysis gasification furnace. The garbage pyrolysis gasification furnace comprises a pyrolysis gasification furnace body, a material conveying screw and a combustion chamber sleeve pipe; the pyrolysis gasification furnace body is composed of a furnace body, a pyrolysis material inlet, a catalyst inlet, a porous carbon collecting port, a catalyst collecting port, a circulating flue gas inlet, a synthesis gas outlet pipe and a synthesis gas branch; an inside space of the furnace body is divided into a pyrolysis area and a gasification area according to functions; and an outer end of the furnace body corresponding to one end ofthe synthesis gas outlet pipe and the combustion chamber sleeve pipe are separated into a combustion area by gas baffle plates, and the remaining part between the combustion chamber sleeve pipe and the furnace body forms a jacketed heat exchange structure. The garbage pyrolysis gasification furnace can realize continuous feeding, and is also more even in heating during the pyrolysis process, higher in quality of synthesis gas and lower in content of harmful pollutants and tar.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, in particular to a garbage pyrolysis gasifier for catalytic pyrolysis flue gas circulation and a working method thereof. Background technique [0002] Pyrolysis technology is an emerging technology to solve the disadvantages of municipal waste incineration technology and realize the efficient and harmless treatment of solid waste. Since the heating process of waste pyrolysis technology is carried out in an oxygen-deficient atmosphere, less toxic pollutants containing oxygen are produced, and the generated syngas has a higher calorific value, a smaller volume, and a higher added value of by-products Porous carbon materials are beneficial to meet different energy demands. However, also because the pyrolysis process is carried out in an oxygen-deficient atmosphere and high temperature conditions, there will be a large amount of pyrolysis tar in the pyrolysis synthesis gas, which has becom...

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Problems solved by technology

However, also because the pyrolysis process is carried out in an oxygen-deficient atmosphere and high temperature conditions, there will be a large amount of pyrolysis tar in the pyrolysis synthesis gas, which has become one of the problems hindering the large-scale application of solid waste pyrolysis technology

Pyrolysis tar will not only affect the gas quality of syngas, reduce the calorific value of syngas, but also condense in downstream equipment and affect its normal operation

At present, the application of pyrolysis technology in waste treatment still has problems such as high cost of tar treatment, low calorific value of synthesis gas, and uneven heating in the pyrolysis process.

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