A heat pump driven air direct carbon capture device based on tvsa cycle

Abstract

This invention discloses a TVSA-based heat pump-driven direct carbon capture device for air, comprising an evaporative cooler, a heat pump subsystem, and a DAC subsystem mainly composed of at least two adsorption beds and a first condenser. The heat pump condenser of the heat pump subsystem is connected to the heat exchange channels of multiple adsorption beds through an internal heat source circulation loop, providing desorption heat to the DAC subsystem. The air inlet of the evaporative cooler is connected to the processing gas pipeline of the DAC subsystem through a pipeline to recover the latent heat waste heat of the processing gas of the DAC subsystem; simultaneously, it is connected to the medium pipeline of the first condenser through a condensation circulation loop to condense the gas produced by the DAC subsystem. The invention employs a TVSA-based DAC capture subsystem, utilizing the evaporative cooling of water vapor in the evaporative cooler to convert the low moisture content potential energy in the dried processing gas at the adsorption outlet into the cooling energy of the cooling water, which is used for the condensation and separation of H2O in the desorbed gas, thereby achieving the production of high-concentration CO2.

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