Hydrogasified CO2 partial trapping IGCC (integrated gasifying combined cycle) system and working method thereof

Abstract

The invention discloses a hydrogasified CO2 partial trapping IGCC (integrated gasifying combined cycle) system and a working method thereof. The system comprises a gasifying furnace, a desulfurization unit and a synthesis gas modulation unit which are connected in sequence, and an outlet of the desulfurization unit is sequentially connected with a water-gas conversion unit and a decarbonization unit. Pretreated coal and a stream of water serving as a gasifying reaction raw material are simultaneously fed into a gasifying furnace to generate synthesis gas, the synthesis gas is fed into a desulfurization unit, a part of clean synthesis gas generated by the desulfurization unit passes through a water-gas shift unit and then is fed into a decarburization unit to generate CO2, and the generated CO2 is captured; and the other part of clean synthesis gas generated by the desulfurization unit is fed into the synthesis gas modulation unit. Part of CO2 in the synthesis gas is captured, and the carbon emission intensity of coal power generating is reduced.

Description

technical field [0001] The invention belongs to the field of CO2 capture, and relates to a hydrogenation gasification CO2 partial capture IGCC system and a working method thereof. Background technique [0002] Coal is an important basic energy source in my country, and it is also the main source of CO2 emissions in my country. Integrated gasification combined cycle system (IGCC) is a high-efficiency power generation technology that organically integrates clean coal gasification technology and high-efficiency gas-steam combined cycle power generation technology. my country built and put into operation the first 250,000-kilowatt-scale IGCC demonstration power station in 2012. Its design net efficiency is 41%. CO2 capture can achieve low-cost capture of CO2, but in the existing technology, it is difficult to capture CO2 in a targeted manner. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior ar...

AI Technical Summary

Problems solved by technology

my country built and put into operation the first 250,000-kilowatt-scale IGCC demonstration power station in 2012. Its design net efficiency is 41%. The actual environmental performance of the power station can reach or even exceed that of the natural gas combined cycle power station. CO2 capture can achieve low-cost capture of CO2, but in the existing technology, it is difficult to capture CO2 in a targeted manner

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