Power plant flue gas desulphurization and decarbonization integrated purification system

Abstract

The invention discloses a power plant flue gas desulphurization and decarbonization integrated purification system which comprises a flue gas afterheat utilizing system, a carbon dioxide and sulfur dioxide catching system, and a compressor interstage cooling heat utilizing system. The flue gas afterheat utilizing system uses a part of heat of the power plant flue gas for heating regenerated liquid, reduces the steam consumption in the heat regeneration process, and uses another part of heat for heating rich liquor at an outlet of an absorption tower. The carbon dioxide and sulfur dioxide catching system finishes the adsorption and regeneration processes of carbon dioxide and sulfur dioxide by the absorption tower and a regeneration tower assisted by a pump and a heat exchanger. Conventional alcohol is adopted as an absorbent in the process. The carbon dioxide and sulfur dioxide are simultaneously removed in the absorption tower. The compressor interstage cooling heat is recycled by heating rich liquor, and the sensible heat demand quantity is reduced in the regeneration process. The system simultaneously uses the flue gas afterheat and the compressor interstage heat, carries out the desulphurization and decarbonization in the integration way, and is characterized by cleanness, high efficiency, energy conservation, high desulphurization and decarbonization rate, and the like.

Description

technical field [0001] The invention belongs to the field of power plant flue gas treatment, and relates to a power plant flue gas purification system, in particular to a power plant flue gas desulfurization and decarbonization integrated purification system. Background technique [0002] With the development of the economy and the improvement of people's living standards, the demand for human energy consumption has increased sharply, and the resulting environmental problems such as the greenhouse effect and acid rain are endangering the normal life of human beings. Carrying out basic and applied research on efficient flue gas purification technology from concentrated emission sources is of great strategic significance for effectively reducing carbon dioxide and sulfur dioxide emissions into the atmosphere, protecting the human living environment, and promoting sustainable development. Reducing carbon dioxide and sulfur dioxide emissions from concentrated emission point sour...

AI Technical Summary

Problems solved by technology

The disadvantage is that the amount of solution required will increase; at the same time, the tower height of the regeneration tower will increase, the cost will increase, and there will be an optimization problem between cost and energy

[0008] To sum up, due to various defects, the existing power plant flue gas purification system still has a lot of room for development in terms of system design, energy saving, environmental protection, etc., and cannot effectively achieve the goals of energy saving and low cost.

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