Carbon capture system based on capacitive deionization technology

Abstract

The device comprises an absorption chamber, a capacitive deionization device, a mixing tank and a separation chamber, the capacitive deionization device comprises a chamber A and a chamber B, a boiler waste gas input port is communicated with an inlet of a coil pipe of the separation chamber, and an outlet of the coil pipe of the separation chamber is communicated with the absorption chamber. An absorbent outlet of the absorption chamber and a potassium chloride precipitation outlet of the separation chamber are respectively communicated with the mixing tank, the bottom of the mixing tank is communicated with a chamber A of the capacitive deionization device, a chamber B of the capacitive deionization device is communicated with a doped absorbent solution inlet of the separation chamber, and the chamber A and the chamber B of the capacitive deionization device are respectively communicated with the flash tank. And the flash tank is connected with a storage tank for storing carbon dioxide. According to the invention, the capacitive deionization technology is changed from traditional intermittent work to continuous work in a carbon capture system.

Description

technical field [0001] The invention relates to the field of carbon capture, in particular to a carbon capture system for adjusting pH based on potassium carbonate absorbent combined with capacitive deionization technology. Background technique [0002] There are many CO 2 capture process, but for CO in boiler exhaust gas 2 Capture almost always involves amine absorbents. Amine absorbent is certainly a good CO 2 Adsorbs solvents, but amines are toxic and harmful compounds, and CO will be desorbed later 2 It is necessary to use a certain high temperature, which again increases a lot of energy consumption. In recent years, capacitive deionization technology (CDI), which is applied to the field of seawater desalination, has come into our field of vision. Capacitive deionization technology is used in conjunction with other absorbents to capture CO in exhaust gas. 2 The temperature will not be too high, and the power consumed by the capacitor is also lower, so the CDI captur...

AI Technical Summary

Problems solved by technology

Amine absorbents are certainly a good CO 2 Adsorb the solvent, but the amine is a toxic and harmful compound, and the subsequent analysis of CO 2 It still needs to use a certain high temperature, which again increases a lot of energy consumption

In recent years, capacitive deionization technology (CDI), which has been applied in the field of seawater desalination, has entered our field of vision. Capacitive deionization technology and other absorbents are used to capture CO in exhaust gas. 2 The temperature will no longer be too high, and the power consumed by the capacitor is also low, so the CDI captures CO 2 not a viable option

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