Solar-driven carbon dioxide trapping tower and operation method thereof

Abstract

The invention discloses a solar-driven carbon dioxide trapping tower and an operation method thereof. The carbon dioxide trapping tower comprises a hyperbolic trapping tower, a solar absorbing coatingis arranged on the outer wall of the hyperbolic trapping tower and is used for absorbing gas in a solar heating tower; an air extractor is arranged at the top of the hyperbolic trapping tower, a pregnant solution outlet is formed in the bottom of the hyperbolic trapping tower; a barren liquor pool and a trapping filler are sequentially arranged between the air extractor and the pregnant solutionoutlet from top to bottom; the barren liquor pool is provided with a plurality of outlets, pressurizing nozzles are arranged at the outlets; and a barren liquor conveying pipeline is arranged at the inlet of the barren liquor pool and used for being communicated with the outside. By enhancing the mass transfer rate between the carbon dioxide capture liquid and the atmosphere, the carbon dioxide trapping efficiency is enhanced, and low-concentration carbon dioxide in the atmosphere can be efficiently absorbed.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide capture, and in particular relates to a solar-driven carbon dioxide capture tower and an operation method thereof. Background technique [0002] With the continuous improvement of global industrialization in recent years, carbon dioxide emissions have also continued to increase. In 2019, global carbon dioxide emissions have reached 36.8 billion tons. Reducing carbon emissions has become a common problem that all mankind needs to face. Existing carbon dioxide capture technologies are mainly used to capture and process high-concentration carbon dioxide; but in fact, what needs to be dealt with is low-concentration carbon dioxide in the atmosphere. [0003] There are three main methods of carbon dioxide capture today: 1. Absorption method; 2. Adsorption method; 3. Membrane separation method; Among them, the absorption method uses the properties of carbon dioxide acid gas to chemically react wi...

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Problems solved by technology

[0003] There are three main methods of carbon dioxide capture today: 1. Absorption method; 2. Adsorption method; 3. Membrane separation method; Among them, the absorption method uses the properties of carbon dioxide acid gas to chemically react with weakly alkaline substances, and then decomposes into carbon dioxide gas , but this method is difficult to apply to low concentrations of CO 2 Absorption, a stronger driving force is required to drive the capture liquid for CO 2 Absorption; adsorption method is to use some solid adsorbents to CO 2 Adsorption is carried out, but this method has a small amount of adsorption and poor selectivity, and CO is mainly carried out by temperature difference or pressure difference. 2 The membrane separation method is to use polymeric polymer materials, such as polyimide, cellulose acetate and other materials to make thin films, use the different permeability of the thin film to different gases to separate, and drive the gas through the pressure difference on both sides of the thin film separation, but the separation effect of this method is very poor, and for low concentrations of CO in the atmosphere 2 (350-450ppm (ml / m 3 )) Difficult to efficiently absorb

[0004] In summary, the current existing devices and methods are unable to efficiently absorb low-concentration carbon dioxide in the atmosphere, and there is an urgent need for a new solar-driven carbon dioxide capture tower and its operating method

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