Continuous circulation carbon dioxide capture system on basis of in-situ adsorption/desorption modes

Abstract

The invention belongs to the field of equipment related to carbon capture technologies, and discloses a continuous circulation carbon dioxide capture system on the basis of in-situ adsorption/desorption modes.The continuous circulation carbon dioxide capture system comprises a flue gas purification module, a pressurization module, an isothermal circulation carbon capture reactor group, a gas outlet condensation device, a negative-pressure module and the like which are sequentially connected with one another.The designed isothermal circulation carbon capture reactor group comprises a carbonization reactor and a regeneration reactor which cling to each other to transfer heat, and functions of the carbonization reactor and the regeneration reactor can be switched over after reaction is carried out for a certain time; the carbonization reactor is provided with the pressurization module, the regeneration reactor (42) is provided with the negative-pressure module, and an appropriate quantity of water vapor can be continuously supplied for the regeneration reactor (42).The continuous circulation carbon dioxide capture system has the advantages that the integral reaction efficiency can be obviously improved as compared with existing continuous carbon capture modes, abrasion of solid adsorbent particles due to collision can be eliminated, temperature difference between adsorption and desorption can be reduced to a great extent, the continuous circulation carbon dioxide capture system is economical and environmentally friendly, and the like.

Description

technical field [0001] The invention belongs to the field of equipment related to carbon capture technology, and more specifically relates to a carbon continuous cycle capture system based on an in-situ adsorption / desorption method. Background technique [0002] carbon dioxide (CO 2 ) is one of the main components of greenhouse gases that cause global warming, and contributes as much as 55% to the greenhouse effect. Due to CO 2 Climate change caused by greenhouse gas emissions has become the focus of attention around the world. Carbon capture and storage technology (CCS technology) refers to a technology that captures and separates carbon dioxide from related concentrated emission combustion sources, and uses various methods to store it to avoid its emission into the atmosphere. It is the most effective way to deal with climate change. One of the technical paths. Among them, compared to CO 2 Compression, transportation and storage, capture of CO in flue gas from coal-fir...

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Problems solved by technology

[0005] However, further studies have shown that the technology still has several technical challenges

First of all, the wear resistance of alkali metal oxides and alkaline earth metal oxides is generally poor, and they are too severely broken in the traditional serial double fluidized bed reactor; secondly, due to the limitation of thermodynamics, the adsorption The temperature difference between the adsorption and desorption reaction is relatively large. For example, the temperature difference between the adsorption and desorption of CaO is 350°C, and the temperature difference between the adsorption and desorption of MgO is 250°C. Therefore, the thermal economy of the traditional process is poor; The system with double fluidized beds is complex, inconvenient to operate and limits the room for further improvement of the gas-solid reaction rate

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