CN104998518A - CO2 gathering method and system with low energy consumption and absorbent capable of being extracted and regenerated - Google Patents
CO2 gathering method and system with low energy consumption and absorbent capable of being extracted and regenerated Download PDFInfo
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- CN104998518A CN104998518A CN201510456465.2A CN201510456465A CN104998518A CN 104998518 A CN104998518 A CN 104998518A CN 201510456465 A CN201510456465 A CN 201510456465A CN 104998518 A CN104998518 A CN 104998518A
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- China
- Prior art keywords
- absorbent
- absorption tower
- phase
- extract
- regeneration
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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
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- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to a CO2 gathering method with low energy consumption and absorbent capable of being extracted and regenerated. The CO2 gathering method comprises the steps that 1 pregnant solution containing CO2 absorbed through an absorption tower is separated into concentrated phase A and dilute phase B; The concentrated phase A is delivered to a regenerating tower through a delivery pump for regenerating; the regenerated concentrated phase A and the non-regenerated dilute phase B are delivered into a mixer through the delivery pump, and then the regenerated concentrated phase A and the non-regenerated dilute phase B are entered into the absorption tower after being mixed uniformly to gather the CO2. The invention further relates to a system exclusively used in the method. According to the CO2 gathering method and system with low energy consumption and the absorbent capable of being extracted and regenerated, the novel ionic liquid absorbent can be separated through an extraction technology after absorbing the CO2, the evaporation of the novel ionic liquid absorbent is little and can be ignored, the high-capacity reaction and minor-cycle regeneration of CO2 absorbent are achieved, the CO2 removing rate is improved effectively, and the regenerating cost is lowed at the same time; meanwhile, the high-capacity absorbent is beneficial for the reduction of the effective concentration of the absorbent, so that corrosion on a absorbing system by the absorbent is decreased; harmful effect on the environment caused by the technology itself is further decreased, and low-energy and green carbon gathering is achieved.
Description
Technical field
The present invention relates to a kind of CO
2capture method, especially relates to a kind of low energy consumption and absorbent can extract the CO of regeneration
2capture method.The invention still further relates to a kind of CO being exclusively used in described method
2trapping system.
Background technology
Industrial CO
2trapping technique can be divided into according to the relativeness with combustion reaction front trapping (e.g., IGCC) of burning, and traps (as oxygen-enriched combusting) and post-combustion capture in burning.China increases coal-burning power plant's limited amount newly, deposits repowering and becomes oxygen-enriched combusting or IGCC power plant to drop into comparatively large, operating difficulties.Based on considering the factor such as technology maturity, the scope of application, the application of post-combustion capture technology is wider.
In current world wide, the exemplary teachings of power plant's decarburization collection is the chemical absorbing technology that organic amine MEA etc. is main body substantially, and MEA removes CO
2the features such as it is fast that technology has absorption rate, and price is cheap, so be widely used in the absorption process of carbon dioxide in power industry.But MEA removes CO
2the shortcoming of technology has that certain corrosivity, desorb energy consumption are large, energy consumption is roughly 4.2MJ/kg CO
2, and MEA removes CO
2due to the restriction of reaction rate and reaction capacity, CO
2absorbent relative cycle amount is comparatively large, and economic decarburization efficiency is only 80% ~ 85%; In addition, the volatilization of MEA and the impact of catabolite on environment need assessment further.
Summary of the invention
First technical problem to be solved by this invention, is just to provide a kind of low energy consumption and absorbent can extract the CO of regeneration
2capture method.
Second technical problem to be solved by this invention, is just to provide and is exclusively used in said method and carries out CO
2the system of trapping.
Adopt method and system of the present invention, few for evaporation novel ion liquid absorbent to ignoring can be absorbed CO
2be separated by abstraction technique afterwards, realize CO
2the Large Copacity reaction of absorbent and the regeneration of partial circulating amount, effectively improve CO
2regeneration cost is reduced while removal efficiency; Meanwhile, Large Copacity absorbent is beneficial to and reduces absorbent valid density, thus reduces absorbent to the corrosion of absorption system; And minimizing technology itself, to environment harmful effect, realizes low energy consumption, the trapping of green carbon further.
Solve above-mentioned first technical problem, the technical solution used in the present invention is:
A kind of low energy consumption and absorbent can extract the CO of regeneration
2capture method, is characterized in that comprising the following steps:
S1, will absorb CO from absorption tower
2rich solution, be concentrated phase A and dilute phase B by extract and separate tower extract and separate;
S2, concentrated phase A delivery pump is delivered to regenerator regeneration;
The dilute phase B that S3, the concentrated phase A after regeneration and not carrying out regenerates, is delivered to after blender mixes respectively by delivery pump and enters absorption tower trapping CO again
2.
Described enter absorption tower before high-temperature flue gas cooled by cooler, the concentrated phase A being about to enter regenerator is heated.
Toward current downflow after absorbent after described concentrated phase A and dilute phase B mixes enters absorption tower from top, absorption tower, flue gas enters and upwards flows below absorption tower.
Two-phase after separation, wherein concentrated phase A volume only accounts for 10 ~ 20% of absorbent, but absorbs the CO of more than 90%
2; Dilute phase B volume accounts for 80 ~ 90% of absorbent, but only absorbs the CO of less than 10%
2, do not need to regenerate.
Solve above-mentioned second technical problem, the technical solution used in the present invention is:
A kind of low energy consumption and absorbent can extract the CO of regeneration
2trapping system, it is characterized in that: comprise the cooler connected with pipeline, absorption tower, rich solution pump, extract and separate tower, concentrated phase booster, lean solution cooler, reboiler, regenerator and condenser, described cooler input flue gas, condenser exports carbon dioxide compression systems to, described extract and separate tower separately has dilute phase B loop to return to described absorption tower after dilute phase booster and blender, described lean solution cooler separately has concentrated phase A loop after blender, return to described absorption tower, the cooling water of described cooler delivers to reboiler circulating cooling through circulating pump, described regenerator has pipeline after lean pump, be communicated with lean solution cooler, described absorption tower exports nitrogen-rich gas.
Beneficial effect: this method and system, by significantly reducing the amount of regeneration of absorbent and adopting photo-thermal to drive regeneration techniques, while reducing regeneration energy consumption, can also ensure CO
2trapping effect.
The relatively existing CO of the present invention
2trapping technique, can reduce absorbent regeneration energy consumption more than 60%.
Accompanying drawing explanation
Fig. 1 is the flue gas CO of low energy consumption of the present invention
2trapping system schematic diagram.
Detailed description of the invention
Low energy consumption of the present invention and absorbent can extract the CO of regeneration
2capture method embodiment, comprises the following steps:
S1, will absorb CO from absorption tower
2rich solution, be concentrated phase A and dilute phase B by extract and separate tower extract and separate;
S2, concentrated phase A delivery pump is delivered to regenerator regeneration;
The dilute phase B that S3, the concentrated phase A after regeneration and not carrying out regenerates, is delivered to after blender mixes respectively by delivery pump and enters absorption tower trapping CO again
2.
Be exclusively used in above-mentioned low energy consumption and absorbent can extract the CO of regeneration
2the system of capture method, comprise the cooler 1 connected with pipeline, absorption tower 2, rich solution pump 4, extract and separate tower 5, concentrated phase booster 6, lean solution cooler 8, reboiler 9, regenerator 11 and condenser 12, cooler input flue gas, condenser exports carbon dioxide compression systems to, extract and separate tower separately has dilute phase B loop to return to absorption tower after dilute phase booster 7 and blender 3, lean solution cooler separately has concentrated phase A loop to return to absorption tower after blender, the cooling water of cooler delivers to reboiler circulating cooling through circulating pump, regenerator has pipeline to be communicated with lean solution cooler after lean pump 10, absorption tower exports nitrogen-rich gas.
Wherein:
Blender
The CO that one class is novel
2absorbent, is made up of two-phase A and B, the relative CO of A
2have efficient absorptivity, the volume ratio of A phase and B phase is 1/9 ~ 1/4, is mixed before entering absorption tower by blender, and the absorbent mixed retains CO
2very fast absorption rate and larger absorptive capacity.
Absorption tower
Toward current downflow after the absorbent mixed enters absorption tower from top, absorption tower, with enter absorption tower after the flue gas that up flows react, absorbed CO
2absorbent finally fall bottom absorption tower and become rich solution.Rich solution carries out extract and separate through rich solution transport pump to rich solution extract and separate tower.
Rich solution extract and separate tower
Rich solution sedimentation layering in rich solution extract and separate tower, wherein that bottom is concentrated phase A, and volume only accounts for 10 ~ 20% of absorbent, but absorbs the CO of more than 90%
2; Extract and separate tower top is dilute phase B, and volume accounts for 80 ~ 90% of absorbent, but only absorbs the CO of less than 10%
2; Concentrated phase A Condensed transportation is pumped to regenerator regeneration, and dilute phase B does not need to regenerate, and is again mixed with the A phase after regeneration by diluted phase transport pumped back blender.
Regenerator
After the concentrated phase A Condensed transportation of accounting 10 ~ 20% is pumped to regenerator, realize regeneration by being heated, the absorbent of few internal circulating load needs less regeneration energy consumption, therefore can effectively improve economic decarburization efficiency.Absorbent A phase after regeneration is sent blender back to by lean pump and is again mixed with the dilute phase B come from extract and separate tower.
Heat recovery closed circuit
Absorbent when temperature is lower to CO
2there is larger absorption solubility, can CO be discharged when absorbent absorbs when heat is elevated to uniform temperature
2realize regeneration.
The present invention is provided with two heat recovery loops, and loop one is: enter heat is passed to loop one by the high-temperature flue gas before absorption tower working medium by cooler, realizes under the inner absorbent cryogenic conditions of absorption tower CO
2efficient absorption, the working medium absorbing heat delivers to reboiler by circulating pump, and heating is about to the concentrated phase A entering regenerator, thus effectively reduces the regeneration energy consumption of absorbent; Working medium after heat release is circulated to again the heat that cooler absorbs flue gas, realizes the recycling of heat.
Loop two is: concentrated phase A realizes regeneration by absorbing amount of heat, and heat is passed to the concentrated phase A being about to regeneration by the absorbent A phase after regeneration after lean solution cooler, thus reduces the regeneration energy consumption of concentrated phase A; Absorbent A phase after heat release is circulated to blender and mixes with B phase, thus improves absorbent to CO
2absorption solubility.
Range of application of the present invention can relate to following aspect:
1, there are Sub-critical Parameter unit, supercritical parameter unit, ultra supercritical parameter unit in thermal power plant, and thermal power plant all adopts coal fired power generation, can generate a large amount of CO during coal combustion
2.
2, refine industry etc. as chemical industry purification industry, food service industry and iron and steel in non-electricity industry and relate to CO
2be separated the enterprise of link;
3, can be used as the demonstration test bearing dissimilar absorbent, and to the test platform that the operation working condition of different system is optimized.
Claims (4)
1. a low energy consumption and absorbent can extract the CO of regeneration
2capture method, is characterized in that comprising the following steps:
S1, will absorb CO from absorption tower
2rich solution, be concentrated phase A and dilute phase B by extract and separate tower extract and separate;
S2, concentrated phase A delivery pump is delivered to regenerator regeneration;
The dilute phase B that S3, the concentrated phase A after regeneration and not carrying out regenerates, is delivered to after blender mixes respectively by delivery pump and enters absorption tower trapping CO again
2.
2. low energy consumption according to claim 1 and absorbent can extract the CO2 capture method of regeneration, it is characterized in that: described enter absorption tower before high-temperature flue gas cooled by cooler, the concentrated phase A being about to enter regenerator is heated.
3. low energy consumption according to claim 1 and absorbent can extract the CO of regeneration
2capture method, is characterized in that: the absorbent after described concentrated phase A and dilute phase B mixes enters absorption tower toward current downflow from top, absorption tower, and flue gas enters and upwards flows below absorption tower.
4. one kind is exclusively used in the CO of method as described in claims 1 to 3 any one
2trapping system, it is characterized in that: comprise connect successively with pipeline cooler (1), absorption tower (2), rich solution pump (4), extract and separate tower (5), concentrated phase booster (6), lean solution cooler (8), reboiler (9), regenerator (11) and condenser (12), described cooler input flue gas, condenser export carbon dioxide compression systems to; Described extract and separate tower separately has dilute phase B loop after dilute phase booster (7) and blender (3), to return to described absorption tower successively, described lean solution cooler separately has concentrated phase A loop after blender, return to described absorption tower, the cooling water of described cooler delivers to reboiler circulating cooling through circulating pump, described regenerator has pipeline to be communicated with lean solution cooler after lean pump (10), and described absorption tower exports nitrogen-rich gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510456465.2A CN104998518A (en) | 2015-07-29 | 2015-07-29 | CO2 gathering method and system with low energy consumption and absorbent capable of being extracted and regenerated |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510456465.2A CN104998518A (en) | 2015-07-29 | 2015-07-29 | CO2 gathering method and system with low energy consumption and absorbent capable of being extracted and regenerated |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104998518A true CN104998518A (en) | 2015-10-28 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510456465.2A Pending CN104998518A (en) | 2015-07-29 | 2015-07-29 | CO2 gathering method and system with low energy consumption and absorbent capable of being extracted and regenerated |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105903310A (en) * | 2016-06-02 | 2016-08-31 | 广东电网有限责任公司电力科学研究院 | CO2 trapping system and heating system for regenerating tower of CO2 trapping system |
| CN106362551A (en) * | 2016-11-23 | 2017-02-01 | 四川大学 | System and technology for trapping CO2 in smoke |
| CN109453620A (en) * | 2018-11-27 | 2019-03-12 | 中国科学院力学研究所 | A kind of carbon capture and waste heat recycle coupling device |
| CN113101786A (en) * | 2021-05-10 | 2021-07-13 | 浙江浙能技术研究院有限公司 | Flue gas carbon dioxide capture system and method based on organic solvent absorption-extraction regeneration cycle |
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| US20050205468A1 (en) * | 2004-02-13 | 2005-09-22 | Renaud Cadours | Method for processing a natural gas with extraction of the solvent contained in the purified natural gas |
| CN102553396A (en) * | 2011-12-23 | 2012-07-11 | 武汉凯迪工程技术研究总院有限公司 | Method for trapping carbon dioxide in flue gas of power station with high efficiency and low energy consumption and equipment adopting same |
| CN102580342A (en) * | 2011-01-14 | 2012-07-18 | 北京化工大学 | Process method for regenerating ionic liquid and separating and recovering absorbents |
| CN104338428A (en) * | 2014-10-24 | 2015-02-11 | 无锡伊佩克科技有限公司 | Compound absorbent used for waste gas treatment and treatment method |
-
2015
- 2015-07-29 CN CN201510456465.2A patent/CN104998518A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050205468A1 (en) * | 2004-02-13 | 2005-09-22 | Renaud Cadours | Method for processing a natural gas with extraction of the solvent contained in the purified natural gas |
| CN102580342A (en) * | 2011-01-14 | 2012-07-18 | 北京化工大学 | Process method for regenerating ionic liquid and separating and recovering absorbents |
| CN102553396A (en) * | 2011-12-23 | 2012-07-11 | 武汉凯迪工程技术研究总院有限公司 | Method for trapping carbon dioxide in flue gas of power station with high efficiency and low energy consumption and equipment adopting same |
| CN104338428A (en) * | 2014-10-24 | 2015-02-11 | 无锡伊佩克科技有限公司 | Compound absorbent used for waste gas treatment and treatment method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105903310A (en) * | 2016-06-02 | 2016-08-31 | 广东电网有限责任公司电力科学研究院 | CO2 trapping system and heating system for regenerating tower of CO2 trapping system |
| CN106362551A (en) * | 2016-11-23 | 2017-02-01 | 四川大学 | System and technology for trapping CO2 in smoke |
| CN109453620A (en) * | 2018-11-27 | 2019-03-12 | 中国科学院力学研究所 | A kind of carbon capture and waste heat recycle coupling device |
| CN113101786A (en) * | 2021-05-10 | 2021-07-13 | 浙江浙能技术研究院有限公司 | Flue gas carbon dioxide capture system and method based on organic solvent absorption-extraction regeneration cycle |
| CN113101786B (en) * | 2021-05-10 | 2022-06-28 | 浙江浙能技术研究院有限公司 | Flue gas carbon dioxide capture system and method based on organic solvent absorption-extraction regeneration cycle |
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Application publication date: 20151028 |