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

A calcium-based absorbent and carbon dioxide technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of capture performance degradation, absorbent deactivation, etc., and achieve the effect of improving thermal economy and energy utilization efficiency

Inactive Publication Date: 2017-07-25
ANHUI UNIVERSITY OF ARCHITECTURE
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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

Method used

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  • 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

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Embodiment 1

[0039] Air 19 is sent into air separation unit 16 and is separated into nitrogen 20 and oxygen 22; Nitrogen 20 passes through CO 2 The heat exchanger is heated to high-temperature nitrogen gas 21 and sent to the fluidized bed dehydration regeneration reactor 9 as a fluidized medium, and at the same time, it is used for the dehydration reaction Ca(OH) 2 →CaO+H 2 O for heat; oxygen 22 by CO 2 The heat exchanger is preheated to send high-temperature oxygen 23 into the fluidized bed calcining decomposition reactor 5 bottom oxygen inlet 3 as a fluidizing medium, and at the same time provide an oxidant for the pure oxygen combustion of carbon-based fuels;

[0040] The temperature of the fluidized bed calcination decomposition reactor 5 is 800-1000°C, fresh calcium-based absorbent and carbon-based fuel are respectively fed into the fresh absorbent inlet 1 and carbon-based fuel inlet 2 in the middle and lower part of the reactor, and the carbon-based fuel and high-temperature oxygen ...

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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 ...

Claims

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Application Information

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IPC IPC(8): B01D53/83B01D53/96B01D53/62
CPCB01D53/62B01D53/83B01D53/96B01D2251/404B01D2257/504Y02A50/20Y02C20/40
Inventor 荣鼐方廷勇朱曙光王晏平鲁祥友苏小明王庚马进伟田玺潘玮田杰李文祥
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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