Multi-stage serial bubbling bed-transporting bed superimposed CO2 adsorption reactor and method thereof

Abstract

The invention relates to a multi-stage serial bubbling bed-transporting bed superimposed CO2 adsorption reactor and a method thereof. The reactor comprises a wind chamber, a central air duct, a riser,bubbling beds and a transport bed. Several layers of bubbling beds are coaxially arranged above the wind chamber, and the caliber of the upper bubbling beds is smaller than the caliber of the lower bubbling beds. The topmost bubbling bed is connected to the transport bed. The bubbling bed comprises an air distributor, on which a CO2 adsorbent is arranged. The central air duct passes through the middle part of the bottom layer of air distributors, and the riser passes through the rest of air distributors. The riser and the central air duct are coaxially arranged and there is a gap between theair outlet of the central air duct and an inlet of the riser. Adjacent two bubbling beds are communicated through an overflow pipe, which is provided with a return valve. The gas-solid contact time can be controlled, and circulating rate of the adsorbent also can be adjusted. Meanwhile, the gas-solid countercurrent back-mixing is effectively inhibited, the carbonation difference of the adsorbent is reduced, and efficient and stable operation of the decarbonization system is guaranteed.

Description

technical field [0001] The invention belongs to CO 2 The field of emission treatment, especially related to a multi-stage serial bubbling bed-transport bed stacked CO 2 Adsorption Reactors and Methods. Background technique [0002] In recent years, by CO 2 The greenhouse effect caused by excessive emissions has attracted widespread attention from the international community. Coal-fired power plants are the most important source of carbon emissions in my country, and it is imperative to develop carbon capture technologies that are compatible with them. Among many carbon capture technologies, solid adsorption to remove CO 2 The technology has become one of the current research hotspots because of its good compatibility with coal-fired power plants, no corrosion, and no secondary pollution. However, the matching degree between existing decarbonization reactors and solid adsorbents is still not ideal, which limits the removal of CO by solid adsorption to a certain extent. ...

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Problems solved by technology

However, the reactor has reverse gas-solid backmixing, large deviations in the residence time of the adsorbent, and a decrease in the driving force of the chemical reaction, resulting in inconsistent carbonation degrees of the adsorbent, which ultimately affects the stability of the decarburization process and causes a significant increase in system energy consumption

So far, there is no related report on the technology that can control the gas-solid contact time, effectively adjust the circulation flow rate of the adsorbent, and reduce the difference in the carbonation degree of the adsorbent at the same time.

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