Low-energy-consumption CO2 capturing and compression refining process

Abstract

The invention discloses a low-energy-consumption CO2 capture and compression refining process, which is characterized in that an absorption tower is taken as a center in the absorption process, and a deep purification tower and supercharging equipment are taken as auxiliary materials; according to the desorption process, a desorption tower and a boiler are taken as the center, and a lean and rich liquid heat exchanger, an MVR semi-rich liquid generator and a liquefaction system are supplemented; the other process is a part between the above two processes, and comprises a CO2-rich gas scrubbing solution and an amine recovery system. According to the process, the conditions of heat energy, material flow, crystallization, pressure and the like of each reaction in the reaction are fully considered, the trapping and desorption efficiency is high, heat energy loss is reduced to the greatest extent, and no natural cooling condition exists; and heat energy in the reaction is reasonably utilized, and reactants and products can reach a relatively proper reaction state through reasonable heat exchange, so that energy sources such as heat and flue gas can be recycled.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide capture and recovery, in particular to a low-energy-consumption CO 2 Capture and compression refining process. Background technique [0002] In recent years, carbon dioxide has been the dominant greenhouse gas in the atmosphere. With the development of global industrialization, CO 2 The amount of emissions increased year by year, and it has become one of the main reasons for global warming and extreme climate disasters. [0003] The capture and compression of carbon dioxide has become a hot research topic. For the conventional process, a large part of the heat is taken away by the cooling water in the process of cooling the lean liquid to an appropriate reaction temperature, and the comprehensive utilization of thermal energy is not realized, and the system consumes a lot of energy. [0004] At present, the rich liquid and lean liquid circulation paths in the carbon dioxide capture proce...

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Problems solved by technology

[0003] The capture and compression of carbon dioxide has become a hot research topic. For the conventional process, a large part of the heat is taken away by the cooling water during the cooling of the lean liquid to the appropriate reaction temperature. The comprehensive utilization of heat energy has not been realized, and the system consumes a lot of energy.

[0004] In the carbon dioxide capture process currently on the market, the circulation path of the rich liquid and the lean liquid is relatively single, such as CN1887405 A, whose CO 2 Capture and desorption efficiency is low

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