Method for producing synthesis gas with carbon powder and natural gas/methane as raw materials

Abstract

The invention relates to a method for producing synthesis gas with carbon powder and natural gas / methane as raw materials. The method comprises the steps that carbon powder, natural gas / methane and gasifying agents are subjected to co-gasification reaction at the temperature of 1200-1500 DEG C and the pressure of 1.0-10.0 MPa, the resultant of reaction is subjected to chilling and heat exchange through a cooling system, solid ash is drained to the outside, the synthesis gas product is subjected to ash removal and cooling processing through a Venturi scrubber and a wet ash removal tower, high-concentration synthesis gas is obtained, the volume content of CO+H2 in the synthesis gas is 85.0-95.0%, the content of H2 is 43.0-68.0%, and carbon black water drained from a reaction furnace and the bottom of the wet ash removal tower is drained to a black water treatment workshop section to be treated. The method is wide in range of raw materials, large in production capacity, clean, environmentally friendly, and suitable for multi-line production of industrial large-scale raw material gas preparation.

Description

【Technical field】 [0001] The invention belongs to the technical field of energy chemical industry. More specifically, the present invention relates to a method for producing synthesis gas using carbonaceous powder and natural gas / methane as raw materials. 【Background technique】 [0002] Carbon resources refer to coal, biomass, municipal waste and other natural resources and domestic waste containing carbon substances; [0003] Carbonaceous powder refers to a powdery raw material for industrial production with a certain particle size distribution processed from carbonaceous resources, and coal is the most common and easily available carbonaceous powder raw material. The situation that the world is rich in coal, poor in oil and gas will exist for a long time. Coal is the main energy source in my country, accounting for about 70% of the primary energy structure. For a long time in the future, the status of coal as the main energy source will not change. The coal industry is a...

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Problems solved by technology

[0007] Ouyang Chaobin, Institute of Process Engineering, Chinese Academy of Sciences, et al. ("Natural Gas-Coal Co-Gasification New Technology for Preparation of Syngas") conducted theoretical and experimental studies on the co-gasification of coal-methane in a fixed-bed gasifier, confirming that the coal-methane The mechanism of co-gasification of natural gas is reasonable and feasible; Fang Yitian and others carried out research on the technical direction of co-gasification of coal-methane fluidized bed in CN1190475C, title of invention "method for co-gasification of fluidized bed coal and methane-rich fuel gas to produce synthesis gas" In addition, Anhui University of Science and Technology ("Analysis of Coal and Natural Gas Co-Gasification Process Technology for Preparation of Syngas") also conducted scientific research on coal-methane co-gasification process from different angles and levels, and achieved a lot of research results. However, these research contents and patented technologies are only limited to fixed bed and fluidized bed, and fixed bed and fluidized bed gasification technologies are currently backward coal gasification technologies with poor market prospects

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