System and method for trapping acid gas in smoke

An acid gas and flue gas technology, which is applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of high system energy consumption, excessive energy consumption, and absorption load limited by reaction balance, and achieve energy consumption. The effect of reducing and reducing air pollution

Inactive Publication Date: 2011-07-27
杨东 +2
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Problems solved by technology

At present, most of the R&D and demonstration applications are the alcohol amine method. Its essence is the acid-base neutralization reaction. Carbon dioxide is captured from flue gas at low partial pressure levels, but the absorption load is limited by the reaction equilibrium
The acid-base reaction is reversible with temperature changes. Generally, salt is formed at about 40°C, carbon dioxide is absorbed, and the reaction is reversed above 100°C to release carbon dioxide. Therefore, the abs

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  • System and method for trapping acid gas in smoke
  • System and method for trapping acid gas in smoke

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Embodiment Construction

[0017] Combining the composition and connection mode of the system and the CO 2 , SO 2 The embodiment of the specific capture method further illustrates the present invention.

[0018] Such as figure 1 As shown, the booster fan 1 is connected to the air inlet at the bottom of the absorption tower 2, and the bottom of the absorption tower 2 passes through the absorption liquid inlet A of the pump and the liquid film concentration device 3 1 Connected, the concentrated solution outlet A of the liquid membrane concentration device 3 2 Rich liquid inlet B via pump and lean rich liquid heat exchanger 4 1 Connected, the water outlet A of the liquid membrane concentration device 3 3 and the lean liquid outlet B of the lean rich liquid heat exchanger 4 4 Connected, the rich liquid outlet B of the poor rich liquid heat exchanger 4 2 and the first liquid inlet D at the top of regeneration tower 5 1 Connected, the liquid outlet at the bottom of the regeneration tower 5 is connecte...

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Abstract

The invention relates to a system and a method suitable for trapping acid gas in smoke of a fired power plant by a chemical absorption method. The system comprises an absorption tower, a rich and barren liquor heat exchanger, a regenerating tower, a reboiler and a gas-liquid separator, and a liquid film concentrating device is arranged additionally, so that part of water in rich liquor is removed in the liquid film concentrating device before the rich liquor enters the rich and barren liquor heat exchanger, thus avoiding consumption of excessive unnecessary energy due to the heating of excessive water in the liquor when the rich liquor is regenerated. Removed water and barren liquor flowing out from the regenerating tower are combined, and enter the upper part of the absorption tower for spraying and recycling, so that the energy consumption of the whole system is reduced effectively.

Description

technical field [0001] The invention relates to a chemical purification of flue gas, in particular to a system and method suitable for collecting acid gas by the chemical absorption method of flue gas in coal-fired power plants. Background technique [0002] Acid gases mainly refer to carbon dioxide, sulfur oxides, nitrogen oxides, hydrogen sulfide and other gases produced during the coal conversion process. Carbon dioxide is the main culprit of the current greenhouse effect. Sulfur oxides form acid rain in rainy days, which damage trees and buildings on the ground The damage is huge. At present, the emission reduction of acid gas has become one of the environmental protection issues that governments, academic circles and even business circles are very concerned about. However, carbon dioxide is widely used in soda industry, sugar industry, and welding fields, so carbon capture and storage is an important strategic choice for my country to deal with climate change. Thermal...

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Application Information

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IPC IPC(8): B01D53/14B01D53/18B01D53/78B01D53/50B01D53/62
Inventor 杨东何强陈玉乐薛军韩祥周陵生
Owner 杨东
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