Middle-low temperature regenerated carbon dioxide capturing absorbent and application method thereof

A carbon dioxide and low-temperature regeneration technology, which is applied to chemical instruments and methods, separation methods, and dispersed particle separation, can solve problems such as difficulty in achieving the collection rate of the absorption tower, affecting the efficiency of the collection process, and the load cannot reach expectations, etc., to achieve Effects of reduced latent and sensible heat consumption, low operating temperature, and reduced temperature rise range

Active Publication Date: 2015-11-11
HUANENG CLEAN ENERGY RES INST
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the absorption capacity of the absorbent for carbon dioxide is not strong or the reaction speed is low, it will be difficult to achieve the capture rate of the absorption tower, and the load of carbon dioxide...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Middle-low temperature regenerated carbon dioxide capturing absorbent and application method thereof
  • Middle-low temperature regenerated carbon dioxide capturing absorbent and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A low-temperature regenerated carbon dioxide absorbent. The components are recorded in mass percent: low-temperature regenerated amine: 25.00%; pH regulator: 5.00%; auxiliary agent: 0.03%; water: the balance. The low-temperature regenerative amine is 2-(tert-butylamino)ethanol, the pH regulator is potassium carbonate, and the auxiliary agent is organosiloxane defoamer.

[0024] The method of use is: the low-temperature regenerated carbon dioxide absorbent in the absorption tower reacts with the gas containing carbon dioxide to form a rich liquid, the absorption temperature: 40°C, the absorption pressure: 0.1Mpa, the amount of absorbed carbon dioxide and the low-temperature regenerated amine substance The volume ratio is above 0.40. The rich liquid is preheated through the lean-rich liquid heat exchanger, and a part of carbon dioxide gas is flashed out. The flashed rich liquid enters the regeneration tower for low-temperature pyrolysis, and the regeneration forms lean liq...

Embodiment 2

[0026] A low-temperature regenerated carbon dioxide absorbent. The components are recorded in mass percent: low-temperature regenerated amine: 25.00%; pH regulator: 5.00%; auxiliary agent: 0.02%; water: the balance. The low-temperature regenerative amine is 3-(sec-butylamino)propanol, the pH regulator is potassium hydroxide, and the auxiliary agent is organosiloxane defoamer.

[0027] The method of use is: the low-temperature regenerated carbon dioxide absorbent in the absorption tower reacts with the gas containing carbon dioxide to form a rich liquid, the absorption temperature: 40°C, the absorption pressure: 0.1Mpa, the amount of the absorbed carbon dioxide substance and the low-temperature regeneration amine substance The amount ratio is above 0.35, the rich liquid is preheated through the lean liquid heat exchanger, and a part of carbon dioxide gas is flashed out, and the flashed rich liquid enters the regeneration tower for low-temperature pyrolysis, regenerates into lean...

Embodiment 3

[0029] A low-temperature regenerated carbon dioxide absorbent. The components are recorded in mass percent: low-temperature regenerated amine: 25.00%; pH regulator: 5.00%; auxiliary agent: 0.02%; water: the balance. The low-temperature regenerative amine is 2-(2,2-dimethylpropylamino)ethanol, the pH regulator is sodium bicarbonate, and the auxiliary agent is organosiloxane defoamer.

[0030] The method of use is: the absorbent solution in the absorption tower reacts with the gas containing carbon dioxide to form a rich liquid, the absorption temperature: 35°C, the absorption pressure: 1Mpa, the ratio of the amount of absorbed carbon dioxide to the amount of low-temperature regenerated amine is 0.45 Above, the rich liquid is preheated through the lean-rich liquid heat exchanger, and a part of carbon dioxide gas is flashed out. The flashed rich liquid enters the regeneration tower for low-temperature pyrolysis, regenerates into lean liquid and produces carbon dioxide, and the tem...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A middle-low temperature regenerated carbon dioxide capturing absorbent is composed of the following components in percentage by weight: 10 to 80% of low temperature regenerated amine, 5 to 25% of pH adjuster, 0 to 10% of auxiliary agent, and the balance being water. When the absorbent is used, low temperature regenerated carbon dioxide absorbent in an absorbing tower reacts with gas containing carbon dioxide to form a rich liquor, the absorbing temperature is 30 to 50 DEG C, and the absorbing tower pressure is 0.05 to 6 MPa. The rich liquor is preheated in a barren liquor/rich liquor heat exchanger to flash-evaporate part of carbon dioxide gas, after flash evaporation the rich liquor is transferred to a regeneration tower to carry out low temperature pyrolysis, the rich liquor is converted into barren liquor, at the same time carbon dioxide is generated; the temperature of the bottom of the regeneration tower is 70 to 100 DEG C, the generated hot barren liquor in the regeneration tower is conveyed to the absorbing tower for capturing carbon dioxide after going through the heat exchanger, and thus the whole absorption-regeneration-absorption circle is completed. The provided absorbent can be regenerated at a low temperature, and thus the capturing cost can be reduced in multiple aspects.

Description

technical field [0001] The invention relates to the technical field of gas absorption and separation engineering, in particular to a medium-low temperature regenerated carbon dioxide capture absorbent and a use method thereof. Background technique [0002] At present, in industrial large-scale carbon dioxide emission sources, especially in low-concentration emission sources, the chemical absorption method is generally used to capture carbon dioxide. The absorbent is represented by ethanolamine. It is separated into the rich liquid and leaves the absorption tower. The rich liquid is heated in the regeneration tower, and the compound formed by carbon dioxide and alcohol amine is decomposed by heat to release carbon dioxide and realize the regeneration of alcohol amine. The main problem of this type of absorbent is the high energy consumption of the capture, the regeneration temperature is 110-120°C, and a large amount of saturated steam is required, which is also one of the m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01D53/14
CPCY02A50/20Y02C20/40
Inventor 王金意郜时旺郭东方刘练波牛红伟
Owner HUANENG CLEAN ENERGY RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap