A device and method for synchronously producing methane-enriched synthesis gas and light coal tar

Abstract

The invention discloses a device and method for synchronously preparing methane-rich synthetic gas and light coal tar. The method utilizes a mixture composed of two or more of biomass, low-grade coal, petroleum coke and oil shale as a feeding material according to a specific proportion according to reactant carbon-hydrogen element balance and the feeding material has a particle size range of 0.1 to 1mm. The methane-rich synthetic gas produced by the device comprises 15 to 30 vol% of CO, 20 to 40 vol% of H2, 8 to 35 vol% of CH4, 0.1 to 0.2 vol% of CmHn, 8 to 12 vol% of CO2 and 2 to 4 vol% of N2. In production of methane-rich synthetic gas, high-quality middle and low-temperature coal tar having content of 15-20wt% can be obtained and can be converted into higher value-added high-quality fuel oil, aromatic hydrocarbons and multiple high value-added coal-based fine chemical products after deep processing, greatly improves coal gas economic competitiveness, realizes efficient, stepwise and comprehensive utilization of coal resources and realizes coupling of coal gas and a coal-based fine chemical industry.

Description

technical field [0001] The invention relates to the technical field of high-efficiency clean conversion and utilization of carbon-containing raw materials and coal-to-natural gas, and specifically relates to a carbon-hydrogen compound produced from one or more of biomass, low-rank coal, petroleum coke, and oil shale according to the reaction materials. A device and method for synchronously producing methane-enriched syngas and light coal tar from mixed carbonaceous materials obtained by mixing elements in a specific ratio. Background technique [0002] Coal combustion, especially the scattered burning of low-quality coal, is the main cause of coal-burning air pollution in my country, and it is also the main cause of sulfate, nitrate, and PM in smog. 2.5 One of the important sources of pollutants such as In my country's current coal consumption structure, about 20% is used for industrial boilers and domestic scattered combustion. The main body of bulk coal consumption is sm...

AI Technical Summary

Problems solved by technology

However, Lurgi gasification technology and BGL gasification technology are applicable to lump coal of 5-50 mm, and based on the current mechanical mining technology, the proportion of coal directly used as raw material for the above two gasification processes is less than 30%. A large amount of pulverized coal resources generated in the process cannot be utilized

Although this process method also uses the mixed gas of pyrolysis gas and gasification gas as raw material gas for methanation reaction, semi-coke is still produced in the process technology, and it belongs to high-temperature pyrolysis, and the produced tar contains more heavy components, Less content of BTX and PCX components with high added value

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