CO2 direct air trapping system and method based on wet regeneration adsorption material

Abstract

The invention provides a CO2 direct air trapping system based on a wet regeneration adsorption material, which comprises a plurality of groups of trapping devices connected in parallel, the top of each trapping device is provided with an air inlet, the upper part of each trapping device is provided with a liquid phase inlet and is communicated with a spraying device arranged inside, the lower part of each spraying device is provided with a CO2 adsorption material, and the bottom of each spraying device is provided with a material outlet; the material outlet is respectively connected with the CO2 adsorption material drying gas phase branch, the mixed gas branch and the liquid phase branch; the dehumidifying device, the fan and the heat source are respectively connected with air inlets of the plurality of groups of trapping devices which are connected in parallel; the vacuum pump, the gas-liquid separator, the compressor and the CO2 storage tank are respectively connected with the mixed gas branches of the plurality of groups of trapping devices which are connected in parallel; the liquid storage tank, the water pump and the water tank are respectively connected with the liquid phase branches of the plurality of groups of trapping devices which are connected in parallel. The system can realize the following beneficial effects: the regeneration energy consumption and cost of the adsorption material are reduced; the space utilization rate is improved; the continuous capture and storage of CO2 are realized; cO2 with high concentration is output; and the CO2 gas is not polluted.

Description

technical field [0001] The invention relates to the technical field of DAC, more specifically, relates to a CO 2 Direct air capture systems and methods. Background technique [0002] At present, the main carbon capture technologies are divided into pre-combustion capture, post-combustion capture and oxygen-enriched combustion capture. 2 concentrated capture technology. In fact, about 30-50% of the world's annual CO 2 From distributed emission sources such as transportation, residential building heat, and small factories, CO 2 Direct air capture technology can be used as an effective compensation for centralized capture technology, but there is currently a lack of low energy consumption and continuous capture of CO in the air. 2 system. [0003] DAC (Direct air capture; capture CO directly from the air 2 technology) capture is different from the traditional power plant centralized capture technology, which does not require the captured CO 2 Transported to the storage s...

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Problems solved by technology

However, the drying process of this technical solution uses anhydrous calcium chloride, which is easy to cause corrosion to the equipment, and the solid powder may also pollute the gas; the material is humidified through the wet air flow, the speed is slow and the infiltration effect is not obvious; a single tank cannot continuously capture and store CO 2 ; Failure to pre-extract the excess air in the carbon dioxide adsorption room will lead to the collection of CO 2 The purity is reduced; no compressor is installed, and only atmospheric pressure CO can be stored in the gas tank 2 , small storage capacity and slow speed

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