Method and apparatus for removing superadiabatic partial oxidation coke tar and coke and gas reform

Abstract

The invention relates to a method for removing tar and coke during gasification and a method and a device for reforming combustible gas. The method is characterized in that: pyrolytic gasified gas is fed into a porous ceramic superadiabatic partial tar and coke oxidizing and removing device, and undergoes partial combustion at the front end of porous ceramics or inside a ceramic body; high temperature generated by the combustion carries out heat storage of a porous ceramic body; during the process, the tar inside a combustible gas undergoes pyrolysis in the superadiabatic environment of the porous ceramics so as to form small molecular gas, while alkane gas components inside the combustible gas undergo reforming reaction inside the porous ceramics; and the coke is completely oxidized inside the porous ceramics, thereby reaching the goal of removing the coke. The methods and the device have the advantages that: the tar and the coke are not attached to the porous ceramics or the surface of porous ceramic catalyst, and inactivation phenomenon caused by tar and coke attachment does not occur; moreover, the content of the tar and the coke in gas is almost equal to zero after the reforming, and the heat value of fuel gas is increased.

Description

technical field [0001] The invention belongs to the technical field of tar coke removal and gas reforming methods, and relates to a super adiabatic partial oxidation tar coke removal and gas reforming method and device. In particular, it involves the thermochemical transformation of organic fuels including coal, biomass, general waste, industrial organic waste, waste plastics, waste rubber, garbage-derived fuels and other solid combustibles in pyrolysis and gasification devices. A method and device for removing tar and coke and reforming the generated crude combustible gas. Background technique [0002] Organic solid waste has a huge output and abundant reserves, which is of great significance to its energy recovery and reuse. Thermochemical conversion technologies such as incineration, pyrolysis and gasification are one of the effective methods for treating organic solid waste. Pyrolysis and gasification technologies are the main methods for the thermochemical conversion ...

AI Technical Summary

Problems solved by technology

However, the existing problem is that the tar and carbon black in the gas have a strong ability to cover the surface of the catalyst, resulting in a rapid loss of catalyst activity and a decrease in catalytic efficiency.

In recent years, although some scholars have used noble metals as catalysts to improve the removal effect of tar oil, the expensive price of catalysts has caused an increase in production costs.

In addition, due to the fact that the crude combustible gas produced by actual pyrolysis and gasification contains a large amount of carbon black, these carbon blacks have strong adsorption on the surface of the catalyst, and the catalyst itself has no function of removing carbon black, which greatly affects The catalytic performance and catalytic effect of the catalyst

Most of the catalysts currently used are granular or powder catalysts in form. These catalysts have small specific surface area, high environmental requirements, and uncompact dispersion. They are limited by process conditions and catalytic efficiency. The practicality of catalysts sex is more restricted

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