IGCC (Integrated Gasification Combined Cycle) based pre-combustion CO2 capture system

A technology of CO2-H2 absorption tower, applied in inorganic chemistry, through absorption, separation of dispersed particles, etc., can solve the problems of low cost and high cost of oxygen enrichment, and achieve the effects of reducing emissions, increasing capture rate, and reducing steam consumption

Active Publication Date: 2012-11-21
HUANENG POWER INTERNATIONAL +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

In an oxyfuel combustion plant, due to CO 2 The concentration is higher, so the cost of capture and separation is lower, but the cost of oxygen enrichment supplied is high

Method used

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  • IGCC (Integrated Gasification Combined Cycle) based pre-combustion CO2 capture system

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0022] As shown in the drawings, the device of the present invention includes: a filter 1, a first water separator 2, a first heat exchanger 3, a shift furnace 4, a first humidifier 5, a second humidifier 6, a third humidifier Humidifier 7, Feedwater Preheater 9, Second Water Separator 10, Stripping Tower 11, Feedwater Tank 12, Third Heat Exchanger 13, Absorption Tower 14, Second Heat Exchanger 15, First Liquid Separator 16. Lean-rich liquid heat exchanger 17, desorption tower 18, first solution storage tank 19, second solution storage tank 20, regeneration tower 21, reboiler 22, second liquid separator 23, desulfurization purifier 24, 25 , H 2 S primary absorber 26, H 2 S secondary absorber 27, regeneration tank 28, sulfur foam tank 29, sulfur filter 30, liquid holding tank 31.

[0023] The filter 1 is connected to the coal gas synthesis g...

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Abstract

The invention relates to an IGCC (Integrated Gasification Combined Cycle) based pre-combustion CO2 capture system, which comprises a sulfur-resistant conversion device, an MDEA (Methyl Di Ethanol Amine) desulfurization and decarbonization device and a sulfur and carbon separating device, wherein the sulfur-resistant conversion device is used for converting CO in a synthesis gas into a mixed gas consisting mainly of CO2-H2 in a converting furnace, and the MDEA desulfurization and decarbonization device comprises an absorption tower and a desorption tower; the absorption tower is used for receiving the mixed gas in the sulfur-resistant conversion device and for absorbing CO2 and H2S gases, and the desorption tower is used for receiving CO2 and H2S containing rich solution in the absorption tower and for desorbing CO2 and H2S; the sulfur and carbon separating device comprises a desulfurization purifier for receiving the CO2 and H2S gases in the desorption tower; and H2S gas is absorbed by an H2S absorber, and finally the CO2 gas is obtained. According to the IGCC based pre-combustion CO2 capture system, CO2 and H2S are simultaneously removed by a lean solution-half-lean solution MDEA method, so that the absorption rate of CO2 is improved, and the exhaust to air is reduced; and the heat generated by the conversion process of gas is fully utilized to heat MDEA rich solution for regeneration, and the consumption of medium-pressure steam is reduced.

Description

technical field [0001] The invention belongs to the technical field of clean coal power generation, and relates to an IGCC-based pre-combustion CO 2 capture system. Background technique [0002] The global environmental problems centered on climate change are becoming more and more serious, and have become one of the main factors threatening the sustainable development of human beings. Reducing greenhouse gas emissions to mitigate climate change has become a hot spot in the international community today. Among the many greenhouse gas emission reduction programs, carbon capture and storage technology is an emerging technology with large-scale emission reduction potential, which is expected to realize CO 2 low carbon emissions. [0003] Currently CO 2 There are three main capture technology routes: post-combustion capture technology, oxygen-enriched combustion technology and pre-combustion capture technology. Post-combustion capture is mainly used in CO in the flue gas of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14C01B31/20C01B32/50
CPCY02C10/06Y02C20/40Y02P20/151
Inventor 许世森程健徐越王保民任永强夏军仓李晨张瑞云
Owner HUANENG POWER INTERNATIONAL
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