Clean gas power generation and clean fuel co-production device and method

Abstract

The invention discloses a device and method for clean coal gas power generation and cleaning fuel co-production. The device comprises a raw coal gas producing system, a coal tar upgrading and converting system and a power generation system; raw coal gas generated by a coal tar extraction reaction unit is subjected to dust removing, tar recycling, sulfur removing and deamination, and the treated raw coal gas enters a combustion gas turbine for combustion; combustion flue gas energy is recycled in the modes of electrical energy, hot water and refrigerating water, so that the comprehensive utilization of the combustion flue gas energy is realized; the recycled coal tar is converted into coal-base cleaning liquid fuel finally through a pre-treatment unit, a coal tar hydrogenization unit and a coal tar hydrogenization product separating and purifying unit. Compared with the prior art, the device and the method have the advantages that a cleaning fuel gas power generation technology which is free from heavy metals and low in NOX and SO2 emission is organically combined with a coal-base cleaning fuel production technology, so that the efficient and cleaning conversion of low-rank coal and the gradient comprehensive utilization of energy are realized.

Description

technical field [0001] The invention relates to the technical field of high-efficiency clean conversion and utilization of coal and coal-based polygeneration, in particular to a method of extracting coal tar from coal to produce clean fuel, and the by-product crude gas is subjected to oil-gas separation, dust removal, desulfurization and purification treatment, and then enters a gas turbine for combustion and power generation A device and method for clean gas power generation and clean fuel cogeneration. Background technique [0002] At the end of 2014, the national installed capacity of power generation reached 1,360,190,000 kilowatts. In terms of power generation structure, my country's thermal power installed capacity accounts for 67.4% of total installed capacity and 75.2% of total power generation; coal-fired power generation accounts for more than 90% of thermal power, still occupying an absolute dominant position. Studies have shown that carbon dioxide emissions from...

AI Technical Summary

Problems solved by technology

The disadvantages of this technical system are: first, the direct combustion of semi-coke still has the possibility of producing a large amount of PM2.5 and other particulate matter; Third, the yield of tar in coal pyrolysis products is low; fourth, the reaction conditions in the deep conversion and utilization process of tar are harsh, the conversion rate of tar is low, and the adaptability of raw materials is poor

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