Device for cyclically removing carbon dioxide using calcium-based absorbent with steam activated reactor and method for cyclically removing carbon dioxide using calcium-based absorbent

Abstract

The invention discloses a device for cyclically removing carbon dioxide using a calcium-based absorbent with a steam activated reactor. The device comprises a fluidized bed carbonation reactor, a fluidized bed calcination decomposition reactor, a fluidized bed steam activated reactor, a fluidized bed dehydration regeneration reactor, a first cyclone separator, a second cyclone separator, a first return feeder, a second return feeder, a circulating material heat exchanger, a CO2 heat exchanger, an air separation unit and pipelines for connecting parts. The activity of CaO inactivated after calcination is regenerated by using the steam activated reactor, and an absorbent pore structure and a reaction surface are substantially regenerated by a hydration-water loss reaction, so that the activity of the calcium-based absorbent can be significantly maintained, the decline in activity of the absorbent is inhibited, and the discharge of an inactivated absorbent and the replenishment amount of a fresh absorbent can be reduced; the heat of temperature flue gas and a recycled material is fully utilized by using the heat exchanger to generate high temperature oxygen, nitrogen and steam, and the thermal economy and energy utilization efficiency of a carbon capture process are improved.

Description

technical field [0001] The present invention relates to the removal of CO 2 The device field, to be precise, is a device and method for removing carbon dioxide in a calcium-based absorbent cycle with a steam activation reactor. Background technique [0002] In order to cope with global warming and the intensification of the greenhouse effect, a large amount of CO released during the use of fossil energy needs to be 2 For emission reduction and control, a chemical chain cycle based on calcium-based absorbents captures CO 2 The technology has attracted much attention because it can be coupled with the fossil energy utilization process. Calcium-based chemical chain technology for cyclic capture of CO 2 It is divided into two steps of carbonation and calcination: firstly, the calcium-based absorbent whose main component is CaO is in the carbonation reactor and the CO in the flue gas generated by the utilization of fossil fuels. 2 Carry out carbonation reaction to form CaCO ...

AI Technical Summary

Problems solved by technology

[0003] The main problem of the current calcium-based chemical chain carbon capture technology is that the calcium-based absorbent undergoes irreversible sintering of the crystal structure during the high-temperature cycle, resulting in densification of the porous structure of the absorbent, thereby hindering CO 2 Enter the core of the absorbent to participate in the carbonation reaction, deactivating the absorbent, that is, CO 2 Capture performance degrades rapidly with increasing cycle times

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