Coal gas and pulverized coal synergistic power generation and polygeneration device and method

Abstract

The invention relates to a device and a method for synchronous power generation and multi-generation of coal gas and powdered coal. High-volatile constituent faulty coal lignite, jet coal, non-caking coal, weakly caking coal, bottle coal are taken as feed coal, and enter a gasification-thermal dissociation coupled reactor by pressurizing a feeder so as to be subjected to high-efficiency and rapid pyrolysis reaction. the tar recovered from crude gas is pyrolyzed, the pyrolyzed tar is purified, then the purified tar is subjected to deep processing and transforming, finally, the tar is transformed into clean fuels such as liquefied gas, gasoline and diesel oil, the coal gas and bunker coal powder obtained by separation are subjected to blending combustion in a pulverized fuel boiler or a circulating fluid bed boiler, and thus steam is generated to drive a steam turbine so as to generate electricity. According to the invention, the preparation of coal-based clean fuels and fuel gas electricity generation technology are highly integrated; the coal gas and the coal dust are subjected to blending combustion in the boiler, so that the quantity of flue gas is deeply reduced; the concentration of PM2.5 and PM10 in flue gas is extremely low, the light-concentration emission of SO2, NOX, and heavy metals such as lead, chromium, cadmium, arsenic, mercury is realized, and the multi-generation of coal base energy source and gradient high efficiency utilization are realized.

Description

technical field [0001] The present invention relates to the technical field of high-efficiency clean transformation and utilization of coal and coal-based polygeneration, and specifically relates to a method of extracting coal tar from coal to produce clean fuel, and the by-product crude gas enters the power plant boiler and pulverized coal for blending according to a specific ratio. Pulverized coal synergistic power generation, polygeneration device and method. Background technique [0002] According to the 2013 World Energy Statistical Yearbook published by BP, the average ratio of crude oil, natural gas, coal, nuclear energy, hydropower, and renewable energy in the world's primary energy consumption in 2013 was 32.9:23.7:30.1:4.4:6.7:2.2, while my country The corresponding ratio is 17.8:5.1:67.5:0.9:7.2:1.5. my country's coal-based energy consumption structure is the primary cause of our country's environmental pollution directly, and it is also one of the important reaso...

AI Technical Summary

Problems solved by technology

However, none of the existing co-combustion systems combine coal-fired power generation technology with coal-based clean liquid fuel production technology, and have not truly realized coal-based energy polygeneration and cascaded efficient utilization of coal resources.

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