Coupled cold storage device for separating and sealing CO2 in mixed gas by hydrate method

Abstract

A coupling cold storage device for separating CO2 in sealed mixed gas by a hydrate method belongs to the technical field of natural gas hydrate technology application, and comprises a gas compression device, a refrigeration cycle device, a hydrate generation / decomposition device, a hydrate cold storage device, a water cycle device, a gas hydrate sealing device and a sensing monitoring device. Taking biogas separation and storage as an example, the refrigeration cycle device can realize cooling treatment on biogas, decomposed gas at all levels, hydrates and circulating water, and provides low-temperature conditions required by generation of the hydrates. The hydrate cold storage device can make full use of latent heat of phase change of hydrate and provide cold energy required by a user side. And the water circulation device can realize cyclic utilization of decomposed water and guarantee continuous generation of hydrates. The gas separation device can effectively separate methane and carbon dioxide gas in normal-temperature biogas, and the device can be connected in series in a multi-stage manner to obtain high-purity gas. And meanwhile, the device fully utilizes the energy to realize refrigeration by utilizing the advantage of high latent heat of phase change of hydrates, so that the energy loss of the system is reduced, and the energy utilization rate is improved. The gas hydrate sealing device can seal the captured CO2 in a porous medium in a hydrate mode, and CO2 gas emission is effectively relieved.

Description

technical field [0001] The invention belongs to the technical application field of natural gas hydrate, and relates to an experimental device for recovering and storing carbon dioxide in mixed gas by using a hydrate method. Background technique [0002] The dramatic changes in the global climate caused by global warming have attracted more and more attention from governments and people around the world. As an effective means to deal with global warming, carbon dioxide capture and storage application technology has attracted more and more attention and attention from scholars around the world. Hydrate carbon capture and storage technology has important application prospects. [0003] At present, the hydrate carbon capture and storage technology has a wide range of applications, focusing on the capture and storage of pure carbon dioxide gas, and the separation and storage equipment of mixed gas has no mature integrated application integrated system equipment at home and abroad...

AI Technical Summary

Problems solved by technology

[0003]At present, hydrate carbon capture and storage technology has a wide range of applications, focusing on the capture and storage of pure carbon dioxide gas, and the separation and storage equipment for mixed gas is not yet mature at home and abroad Integrated application integration system equipment

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