CN105032123B - A kind of application method of middle low-temp recovery collecting carbonic anhydride absorbent - Google Patents
A kind of application method of middle low-temp recovery collecting carbonic anhydride absorbent Download PDFInfo
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- CN105032123B CN105032123B CN201510377568.XA CN201510377568A CN105032123B CN 105032123 B CN105032123 B CN 105032123B CN 201510377568 A CN201510377568 A CN 201510377568A CN 105032123 B CN105032123 B CN 105032123B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Abstract
A kind of middle low-temp recovery collecting carbonic anhydride absorbent, each component are by mass percentage：Low-temp recovery amine：10~80%；PH adjusting agent：5~25%；Auxiliary agent：0~10%；Water：Surplus；In use, the carbon-dioxide absorbent of low-temp recovery forms rich solution with the gas reaction containing carbon dioxide in absorption tower, temperature is absorbed：30~50 DEG C, absorb pressure tower：0.05~6Mpa, rich solution is preheated by poor rich liquid heat exchanger, flash off a part of carbon dioxide gas, rich solution after flash distillation enters regenerator and carries out low temperature pyrogenation, regeneration becomes lean solution and output carbon dioxide, 70 100 DEG C of column bottom temperature is regenerated, the hot lean solution that regenerator generates is sent to absorption tower for collecting carbonic anhydride by heat exchanger, completes entire absorption and regeneration absorption cycle；Present absorbent can regenerate at a lower temperature, so as to cut down trapping cost in various aspects.
Description
Technical field
The present invention relates to gases to absorb and separation engineering technical field, and in particular to a kind of middle low-temp recovery carbon dioxide is caught
Collect the application method of absorbent.
Background technology
At present, in industrial large-sized CO2 emission source, carbon dioxide one is trapped in the emission source of particularly middle low concentration
As select chemical absorption method, absorbent using ethanol amine as representative, in absorption tower with sour gas carbon dioxide reaction formationization
Object is closed, it is made to be separated from gas phase into rich solution and leaves absorption tower.Rich solution is heated in regenerator, carbon dioxide
The compound formed with hydramine, which is heated, decomposes release carbon dioxide and realizes that hydramine regenerates.The main problem of this kind of absorbent
It is that the energy consumption trapped is higher, regeneration temperature is 110-120 DEG C, needs to consume a large amount of saturated vapor, this is also this kind of carbon trapping
One of high main reason of technical costs.
It by taking monoethanolamine as an example, traps regeneration energy consumption in technique and accounts for more than the 60% of total energy consumption, and change in regeneration energy consumption
It closes the heat needed for object pyrolysis and accounts for about 50%, rich solution is warming up to the adjoint sensible heat of regeneration temperature and latent heat respectively accounts for 25% or so.Such as
The absorbent that fruit uses can be regenerated with carbon dioxide at 95 DEG C, just be enough to restore the energy of absorbent trapping carbon dioxide again
Power, calculation shows that in this way under conditions of concentration of absorbing is consistent with rich or poor liquid load, entire trapping cycle can save nearly 50%
Sensible heat and more than 80% latent heat, meanwhile, the compound generalization that the low absorbent of regeneration temperature and carbon dioxide are formed
It is relatively low to learn regenerated heat.In this way under equal conditions, the trapping energy consumption of carbon dioxide entirety is estimated will to reduce by more than 25%.However,
If absorbent is not strong to the binding ability of carbon dioxide or reaction speed is low, then the capture rate on absorption tower is just relatively inaccessible to,
Expection is not achieved in the load of carbon dioxide in rich solution, it is also possible to influence the efficiency of trapping technique, therefore low-temp recovery in use
Carbon-dioxide absorbent also rarely have feasible discovery.
Invention content
In order to overcome shortcoming of the existing technology, the purpose of the present invention is to provide a kind of middle low-temp recovery carbon dioxide
The application method of absorbent is trapped, absorbent has the characteristics that regeneration energy consumption is low, circulation volume is big.
In order to achieve the above object, the present invention uses following technical scheme：
A kind of middle low-temp recovery collecting carbonic anhydride absorbent, each component are by mass percentage：
Low-temp recovery amine：10~80%
PH adjusting agent：5~25%
Auxiliary agent：0~10%
Water：Surplus.
Wherein, the low-temp recovery amine is organic amine, is a kind of substance, structural formula is：
In structural formula, R1, R2, R6, R8 be linear paraffin, R3, R4, R5, R7, R9, R10 for hydrogen atom, linear paraffin base,
Branched alkane alkyl or alkoxy, R5, R6 is straight chained alkyls or, specifically include 2- (tert-butylamine base) ethyl alcohol, 2- (2,2 dimethyl propylenes
Amido) ethyl alcohol, 3- (Zhong Ding amino) propyl alcohol etc..
The pH adjusting agent is potassium carbonate, sodium carbonate, potassium hydroxide, sodium hydroxide, saleratus or sodium bicarbonate.
The auxiliary agent be one or more antifoaming agent, antioxidant or corrosion inhibiter, antifoaming agent for organosiloxane, amide or
Fatty alcohol；Antioxidant is potassium tartrate, sodium tartrate, potassium antimony tartrate or sodium thiosulfate；Corrosion inhibiter is chromate, nitric acid
Salt or molybdate.
A kind of application method of middle low-temp recovery collecting carbonic anhydride absorbent, the specific steps are：
The carbon-dioxide absorbent of low-temp recovery forms rich solution with the gas reaction containing carbon dioxide in absorption tower, absorbs
Temperature：30~50 DEG C, absorb pressure tower：0.05~6Mpa, rich solution are preheated by poor rich liquid heat exchanger, flash off a part
Carbon dioxide gas, the rich solution after flash distillation enter regenerator and carry out low temperature pyrogenation, and regeneration becomes lean solution and output carbon dioxide, then
Raw 70-100 DEG C of column bottom temperature, the hot lean solution that regenerator generates are sent to absorption tower by heat exchanger and are used for collecting carbonic anhydride,
Complete entire absorption-regeneration-absorption cycle.
The carbonated air source includes the industrial gasses of flue gas, synthesis gas or natural gas.
Compared with prior art, the present invention has the following advantages：
Since absorbent can regenerate at a lower temperature, the low-grade steam of use even 80 that can be more as possible
The waste heat of degrees centigrade, and regeneration temperature water boiling point hereinafter, temperature elevating range substantially reduces, the latent heat of regenerative process and aobvious
Heat loss is reduced, therefore can greatly reduce the energy consumption of collecting carbonic anhydride, the energy of trapping system low additionally, due to operation temperature
Consumption and corrosion are greatly reduced, so as to cut down trapping cost in various aspects.
Specific embodiment
With reference to example, the present invention is described in detail.
Embodiment one
A kind of carbon-dioxide absorbent of low-temp recovery, each component are denoted as by mass percentage：Low-temp recovery amine：
25.00%；PH adjusting agent：5.00%；Auxiliary agent：0.03%；Water：Surplus.Low-temp recovery amine be 2- (tert-butylamine base) ethyl alcohol, pH tune
Section agent is potassium carbonate, and auxiliary agent is organosiloxane antifoaming agent.
Its application method is：The carbon-dioxide absorbent of low-temp recovery in absorption tower and the gas containing carbon dioxide are anti-
Rich solution should be formed, absorbs temperature：40 DEG C, absorption pressure：0.1Mpa, amount and the low-temp recovery amine of absorbed carbon dioxide material
The ratio between amount of substance is more than 0.40, and rich solution is preheated by poor rich liquid heat exchanger, flashes off a part of carbon dioxide gas,
Rich solution after flash distillation enters regenerator and carries out low temperature pyrogenation, and regeneration forms lean solution and output carbon dioxide, regenerates column bottom temperature
90 DEG C, the hot lean solution that regenerator generates is sent to absorption tower for collecting carbonic anhydride by heat exchanger, completes entire absorption-again
Life-absorption cycle.
Embodiment two
A kind of carbon-dioxide absorbent of low-temp recovery, each component are denoted as by mass percentage：Low-temp recovery amine：
25.00%；PH adjusting agent：5.00%；Auxiliary agent：0.02%；Water：Surplus.Low-temp recovery amine be 3- (Zhong Ding amino) propyl alcohol, pH tune
Section agent is potassium hydroxide, and auxiliary agent is organosiloxane antifoaming agent.
Its application method is：The carbon-dioxide absorbent of low-temp recovery in absorption tower with the gas containing carbon dioxide
Reaction forms rich solution, absorbs temperature：40 DEG C, absorption pressure：0.1Mpa, the amount and low-temp recovery of absorbed carbon dioxide material
The ratio between amount of amine substance is more than 0.35, and rich solution is preheated by poor rich liquid heat exchanger, flashes off a part of carbon dioxide gas
Body, the rich solution after flash distillation enter regenerator and carry out low temperature pyrogenation, and regeneration becomes lean solution and output carbon dioxide, regenerates tower bottom temperature
85 DEG C of degree, the hot lean solution that regenerator generates are sent to absorption tower for collecting carbonic anhydride by heat exchanger, complete entire absorption-again
Life-absorption cycle.
Embodiment three
A kind of carbon-dioxide absorbent of low-temp recovery, each component are denoted as by mass percentage：Low-temp recovery amine：
25.00%；PH adjusting agent：5.00%；Auxiliary agent：0.02%；Water：Surplus.Low-temp recovery amine is 2- (2,2 dimethyl propylene amido) second
Alcohol, pH adjusting agent are sodium bicarbonate, and auxiliary agent is organosiloxane antifoaming agent.
Its application method is：Absorbent solution forms rich solution with the gas reaction containing carbon dioxide in absorption tower, absorbs
Temperature：35 DEG C, absorption pressure：1Mpa, the ratio between the amount of absorbed carbon dioxide material and the amount of low-temp recovery amine substance are
More than 0.45, rich solution is preheated by poor rich liquid heat exchanger, flashes off a part of carbon dioxide gas, the rich solution after flash distillation into
Enter regenerator and carry out low temperature pyrogenation, regeneration becomes lean solution and output carbon dioxide, regenerates 90 DEG C of column bottom temperature, and regenerator generates
Hot lean solution be sent to absorption tower by heat exchanger for collecting carbonic anhydride, complete entire absorption-regeneration-absorption cycle.
Claims (1)
1. a kind of application method of middle low-temp recovery collecting carbonic anhydride absorbent, which is characterized in that the specific steps are：
The carbon-dioxide absorbent of low-temp recovery forms rich solution with the gas reaction containing carbon dioxide in absorption tower, absorbs temperature
Degree：30~50 DEG C, absorb pressure tower：0.05~6Mpa, rich solution are preheated by poor rich liquid heat exchanger, flash off a part two
Carbon oxide gas, the rich solution after flash distillation enter regenerator and carry out low temperature pyrogenation, and regeneration becomes lean solution and output carbon dioxide, regeneration
70-100 DEG C of column bottom temperature, the hot lean solution that regenerator generates is sent to absorption tower for collecting carbonic anhydride by heat exchanger, complete
Into entire absorption-regeneration-absorption cycle；
The gas containing carbon dioxide includes the industrial gasses of flue gas, synthesis gas or natural gas；
The carbon-dioxide absorbent each component is by mass percentage：
Low-temp recovery amine：10~80%
PH adjusting agent：5~25%
Auxiliary agent：0~10%
Water：Surplus；
Wherein, the low-temp recovery amine is organic amine, is a kind of substance, structural formula is：
In structural formula, R1、R2、R6、R8For linear paraffin, R3、R4、R5、R7、R9、R10For hydrogen atom, linear paraffin base, branched paraffin
Base or alkoxy；
The pH adjusting agent is potassium carbonate, sodium carbonate, potassium hydroxide, sodium hydroxide, saleratus or sodium bicarbonate；
The auxiliary agent is one or more antifoaming agent, antioxidant or corrosion inhibiter, and antifoaming agent is organosiloxane, amide or fat
Alcohol；Antioxidant is potassium tartrate, sodium tartrate, potassium antimony tartrate or sodium thiosulfate；Corrosion inhibiter for chromate, nitrate or
Molybdate.
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| CN109012110B (en) * | 2018-06-28 | 2021-04-16 | 北京科技大学 | Method for capturing carbon dioxide by using sodium hydroxide and sodium carbonate |
| CN109012089B (en) * | 2018-06-28 | 2021-04-16 | 北京科技大学 | Method for capturing carbon dioxide by using potassium hydroxide and potassium carbonate |
| CN110052117A (en) * | 2019-05-08 | 2019-07-26 | 华能国际电力股份有限公司 | It is a kind of for the liquid-liquid decomposition absorbent of collecting carbonic anhydride and application |
| CN113318572B (en) * | 2021-05-27 | 2022-06-07 | 华侨大学 | Carbon dioxide phase change absorbent organic alcohol regeneration regulation and control method and application thereof |
| CN114669177B (en) * | 2022-03-09 | 2024-01-26 | 中国矿业大学 | Low-energy-consumption CO 2 Trapping and compression refining process |
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| CN103002971A (en) * | 2010-06-30 | 2013-03-27 | 新日铁住金株式会社 | Aqueous solution capable of absorbing and collecting carbon dioxide in exhaust gas with high efficiency |
| CN104114259A (en) * | 2012-02-08 | 2014-10-22 | 新日铁住金株式会社 | Aqueous solution which efficiently absorbs and recovers carbon dioxide in exhaust gas, and method for recovering carbon dioxide using same |
| CN104645780A (en) * | 2015-02-04 | 2015-05-27 | 中国华能集团清洁能源技术研究院有限公司 | Temperature-changing condensation absorbent for trapping carbon dioxide and application method of temperature-changing condensation absorbent |
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| CN1354036A (en) * | 2001-10-30 | 2002-06-19 | 南化集团研究院 | Compound amine solvent for recovering low fractional pressure carbon dioxide |
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