Low-energy-consumption desorption system and method for carbon dioxide through cooperation of catalyst and external field reinforcement

Abstract

The invention relates to a low-energy-consumption desorption system and a low-energy-consumption desorption method for carbon dioxide through cooperation of a catalyst and an external field. Rich liquor absorbing CO2 is conveyed through a rich liquor conveying pump, and the rich liquor and barren liquor conveyed through a barren liquor conveying pump after desorption are subjected to heat exchange in a barren liquor and rich liquor heat exchanger to be heated; the heated rich solution enters a desorption tower, the regenerated barren solution is vaporized by a microwave reboiler and then provides desorption energy for the rich solution in the desorption tower, the barren solution vaporized by the microwave reboiler is in reverse contact with the rich solution, and the contact area sequentially comprises a filler area with an ultrasonic strengthening area and a catalytic area with the ultrasonic strengthening area from top to bottom; the desorbed gas mixture is cooled by a gas-liquid cooler, and liquid obtained after gas-liquid separation by a gas-liquid separator is continuously injected into the desorption tower for circulation; and the energy consumption is reduced by more than 40%. The low-energy-consumption desorption of the carbon dioxide is realized under the action of the catalyst cooperating with the external fields such as the ultrasonic field/microwave electromagnetic field.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide capture and utilization, and in particular relates to a system and a method for enhancing low-energy consumption desorption of carbon dioxide in conjunction with a catalyst and an external field. Background technique [0002] a lot of carbon dioxide (CO 2 ) gas is gradually warming the earth, and in order to achieve carbon neutrality by 2060, carbon capture and storage (CCS) projects in high-carbon emission plants can eliminate and permanently store almost all carbon dioxide after the use of fossil fuels. According to my country's current national conditions, the transformation of high-carbon emission factories and the adaptation of CCS technology are the general trend. Promising carbon capture models. The process of capturing carbon dioxide is mainly as follows: in the absorption tower, the alcohol amine solution is used as the absorbent to chemically absorb the carbon dioxide in the flue...

AI Technical Summary

Problems solved by technology

However, this technology still has the following disadvantages: high energy consumption and low desorption rate under low carbon dioxide capture rate; complex arrangement of internal trays and packing, high operation and maintenance costs; low tower height, and short time for the entire desorption process

90% of this increased energy consumption comes from the absorbent regeneration and carbon dioxide desorption of the desorption tower at high temperature. In order to reduce the high energy consumption and high cost of the traditional desorption tower, it is necessary to develop a desorption system with simple structure, low energy consumption and high carbon dioxide circulation. The most effective method, but due to the complexity of material preparation and working conditions, a large amount of experimental accumulation is required

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