Decompression regeneration system and method for hollow fiber membrane contactor of carbon dioxide enriched absorbent solution

Abstract

The invention discloses decompression regeneration system and method for a hollow fiber membrane contactor of a carbon dioxide enriched absorbent solution. The method comprises the steps of: heating the carbon dioxide enriched absorbent solution by a heater, and enabling the pressurized carbon dioxide enriched absorbent solution to enter the tube pass of the hollow fiber membrane contactor for regeneration by a booster pump and a liquid flow meter; outputting the obtained barren solution of the absorbent solution after regeneration from the lower end of the tube pass of the hollow fiber membrane contactor; blowing steam by the low temperature generated by a blowing steam generator under the action of a vacuum pump, and feeding the steam from the lower end of the tube pass of the hollow fiber membrane contactor for assisting regeneration; and dewatering the regenerated CO2 by a condenser under the actions of the blowing of the steam with low temperature and the suction of the vacuum pump to obtain the CO2 gas with high concentration. In the invention, the decompression operation is carried out in the membrane contactor for replacing the traditional heating regeneration method, the regeneration energy consumption of the CO2 absorbent solution is reduced, and the problem of high energy consumption of CO2 separation from fire coal and flue gas by using the chemical absorbent method can be solved.

Description

technical field [0001] The present invention relates to regenerated CO-enriched 2 The system and method of alkaline absorbent, more specifically, the present invention relates to a decompression regeneration system and method of a hollow fiber membrane contactor in a carbon dioxide-rich absorbent solution. Background technique [0002] Flue gas CO based on chemical absorption 2 Separation technology is currently the mainstream CO in power station flue gas 2 However, the main reason for its difficulty in large-scale promotion is that the energy consumption of the system operation is too high, especially the regeneration energy consumption of the absorbent rich liquid is huge. Separation of CO by traditional chemical absorption 2 The process adopts the method of steam heating to regenerate the rich liquid and complete the CO 2 The enrichment, and the energy consumption of this part of thermal regeneration accounts for more than 80% of the energy consumption of the whole pr...

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Problems solved by technology

Although the above patents have optimized and improved the regeneration process and heating source, these methods are still based on heating the rich liquid of the absorbent to achieve the regeneration of the absorbent, the reduction in consumption is not obvious, and thermal regeneration is accompanied by the degradation of the absorbent question

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