A device for producing high-quality gas by pyrolysis of carbon-containing raw materials

Abstract

The invention relates to the technical field of energy and chemical engineering, and relates to a device for pyrolyzing carbon-containing raw materials to produce high-quality gas. The device includes a feeding port, a combustion heating chamber, a pyrolysis reaction chamber, an internal gas collection chamber, and a gas collection channel , gas outlet, coke quenching chamber and semi-coke outlet, wherein the internal gas collection chamber is located in the middle area of ​​the pyrolysis reaction chamber and there are pores on the side walls of the gas collection chamber to form pyrolysis gas phase products to collect gas from the material layer to the inside The gas path for flow in the cavity, the gas collection channel is located outside the bottom area of ​​the pyrolysis reaction chamber and has holes on the reactor wall shared with it, forming a gas path for the gas to flow from the solid particle layer to the gas collection channel. The device of the invention can effectively remove tar and dust in the process of producing gas by using granular carbon-containing raw materials with wide particle size distribution, and can improve gas quality and gas output at the same time.

Description

technical field [0001] The invention relates to the technical field of energy and chemical industry, in particular to a device for pyrolyzing carbonaceous raw materials to produce high-quality gas. Background technique [0002] In addition to natural gas, various industries in my country use a large amount of CO, H 2 、CH 4 Gas as the main component, such as gas prepared from coal, biomass and various wastes. Among them, due to the significant resources and cost advantages of coal-based gas, most of the industrial gas consumed in China every year comes from coal. Typically, industrial gases are produced by gasification. Pyrolysis of carbonaceous raw materials such as coal in an inert atmosphere will produce tar, non-condensable gas and semi-coke. In fact, in many actual productions, it is only required to produce coke (or semi-coke) and as much medium and high calorific value gas as possible without tar. Usually, there are strict restrictions on the tar content in the ga...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: the cost of using lump coal or briquettes as raw materials is high; the generated pyrolysis gas contains tar, and it is necessary to add a detarring process outside the furnace for further purification treatment, which increases investment and process complexity

The disadvantage of this method is that when the circulating hot ash is used as the heat source, the coal gas released by pyrolysis will carry a large amount of dust when it flows out of the reactor, which will affect the long-term stable operation of the subsequent purification process; There will still be more tar components, which require a follow-up special detarring process

[0004] It can be seen that there is still a lack of an integrated device for producing high-quality gas from carbonaceous raw materials with a wide particle size distribution.

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