CN103505985A - Method for capturing flue gas CO2 by using power wave absorber - Google Patents
Method for capturing flue gas CO2 by using power wave absorber Download PDFInfo
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- CN103505985A CN103505985A CN201210221466.5A CN201210221466A CN103505985A CN 103505985 A CN103505985 A CN 103505985A CN 201210221466 A CN201210221466 A CN 201210221466A CN 103505985 A CN103505985 A CN 103505985A
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
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- Gas Separation By Absorption (AREA)
Abstract
The invention belongs to the technical field of gas separation and in particular relates to a method for separating and capturing CO2 from CO2-containing flue gas. According to the method, CO2 is removed from the CO2-containing flue gas by taking a solvent or a formulated solution of multiple solvents with high CO2 capturing efficiency as an absorbent and taking the power wave absorber as absorption equipment, so compared with the conventional method, the method has the advantages that the mass transfer efficiency is high and the size of the traditional absorption equipment is reduced.
Description
Technical field
The invention belongs to gas separation technique field, be specifically related to a kind of from containing CO
2flue gas in separation and collection CO
2method.
Background technology
Global warming is more and more serious, the CO of industrial discharge
2be considered to cause the main cause of climate warming.To main CO
2the CO that emission source is discharged
2carrying out separation and collection, seal up for safekeeping and utilize, is to realize CO
2important measures that reduce discharging.Therefore, CO
2the research and development of trapping technique and industrialization are the hot issues that current countries in the world are paid much attention to.
CO<sub TranNum="74">2</sub>trapping technique mainly comprises Physical Absorption method, chemical absorption method, membrane separation process, adsorption method of separation, oxygen-enriched combustion technology, low temperature processing, compound partition method etc.Flue gas has that gas flow is large, CO<sub TranNum="75">2</sub>minute force down, outlet temperature is higher, contain the features such as a large amount of inert gases, its CO<sub TranNum="76">2</sub>trapping technique and the industrial process such as synthetic ammonia, hydrogen manufacturing, natural gas purification in CO<sub TranNum="77">2</sub>the operation that removes have marked difference.Chinese scholars has expended a large amount of human and material resources, and research experiment is crossed the flue gas CO such as chemical absorption method, absorption method, film absorption, distillation in succession<sub TranNum="78">2</sub>trapping technique, there are CO in the U.S., Japan, India, Brazil and Australia at present<sub TranNum="79">2</sub>retracting device is moving, but all has high energy consumption and expensive problem.Alstom is at 9 trial run flue gas CO of pilot plant of Germany, France, Norway, Sweden, America & Canada<sub TranNum="80">2</sub>trapping technique, target to 2015 year realizes the marketization of the rear trapping technique of burning.In December, 2005, USDOE and the U.S. following electric power enterprise alliance subscribes to the agreement, and plans to build in 2009 ~ 2012 years a collection CO<sub TranNum="81">2</sub>the coal-fired plant that trap and seal up for safekeeping, preparing hydrogen, generating power is integrated, 1,000,000,000 dollars of funds.U.S. Warrior Run power station is 180MW CFB boiler, uses Maryland, USA coal, 650,000 tons, year consumption coal.This power station adopts ABB Lummus amine washing process separation of C O<sub TranNum="82">2</sub>, within 2000, put into operation, can produce 150 tons of food-class COs every day<sub TranNum="83">2</sub>.Australian Union's science and industrial research tissue (CSIRO) energy centre had carried out respectively MEA process and ammonia process CO2 trapping test for coal-fired plant flue gas in recent years, and Loy Yang power plant and Munmorah power plant have respectively set up test battery device respectively.
Yet, because the discharge capacity of flue gas is huge, require CO
2catching apparatus has mass-transfer efficiency very efficiently, but it is all less to trap at present scale, and maximum is only 100,000 tons/year, flue gas CO
2the problem that trapping technique and equipment generally face is exactly energy consumption height and extensive CO
2how the problem of trapping through engineering approaches, improve CO
2removal efficiency and reduce costs " bottleneck " that becomes this research direction.Therefore, the separation equipment of urgent need exploitation high flux, high mass transfer efficiency, low pressure drop and inner member are to improve CO
2trapping ability, reduces solvent loss, and strengthening energy is integrated and utilize.
Dynamic wave scrubbing technology is a kind of in wet scrubbing method, is to strengthen gas-liquid heat-transfer, mass transport process by fluid column and the air-flow froth zone that forms high velocity turbulent flow that liquidates, and reaches the effect of gas phase high-efficient purification.
It has following outstanding advantages:
(1) contact area of two-phase is large, and purification efficiency is high.(2) equipment investment is few, cheap, easy for installation, and floor space is little, saves space, and more conventional washing system can be saved about 30% investment.(3) flexible configuration, applied widely.
In prior art, the existing report that dynamic wave scrubbing technology is used for to sulfuric acid industry vent gas treatment aspect, but adopt dynamic wave to carry out flue gas CO
2trapping aspect is not also reported at present.
Summary of the invention
The present invention seeks to propose a kind of method that adopts dynamic wave absorber trapping flue gas CO2.
The present invention adopts a kind of CO
2the solvent that arresting efficiency is high or the formula solution of multi-solvents are made absorbent, and its main feature is to adopt dynamic wave absorber as absorption equipment, from containing CO
2air-flow in especially in flue gas, remove CO
2.
Concrete scheme is as follows: contain CO
2source of the gas first in dynamic wave absorber by with trapping solvent contact the most of CO removing wherein
2, make used absorbent regeneration simultaneously, remove all or part of absorbed CO
2, and then be recycled to absorption step.
Described CO
2trapping solvent, mainly comprises: methyl monoethanolamine (MMEA), AEEA (AEEA), ammoniacal liquor, piperazine and various sterically hindered amines, they can use separately, also can compositely use, or add different activator etc.
The present invention is applicable to remove CO from flue gas
2, but source of the gas is not crucial for purposes of the invention, any CO that contains
2air-flow be all applicable to source of the gas of the present invention, comprise for example natural gas, synthesis gas and various refinery gas.Typically, in these sources of the gas, CO
2content greatly about 2%～50%(mol).
Contain CO
2source of the gas first in dynamic wave absorber by with trapping solvent contact the most of CO removing wherein
2.Make used absorbent regeneration simultaneously, remove all or part of absorbed CO
2, and then be recycled to absorption step.
Absorbed the rich solution of acid gas by heating or reducing pressure or other regenerations realization regeneration.
Described dynamic wave absorber can be contrainjection absorber, Jet absorber or foaming tower absorber in the same way; Dynamic wave absorber can arrange to strengthen assimilation effect by series multistage, efficiently removes CO in flue gas
2.
Method Zhong，Ge of the present invention can be used unit the device of this area conventional structure, and structure and the operating condition of concrete device are that those skilled in the art is known, can be according to the character of unstripped gas and CO
2the requirement of trapping is specifically determined.
Accompanying drawing explanation
Fig. 1 is that embodiment adopts dynamic wave absorber trapping CO
2typical process flow schematic diagram.
In figure: 1-dynamic wave absorber, 2-dynamic wave circulating pump, 3-lean solution cooler, 4-lean pump, 5-solution heat exchanger, 6-regenerator, 7-reboiler, 8-regeneration gas cooler.
The specific embodiment
Below by embodiment, the invention will be further described, but it does not limit the scope of the invention.
Embodiment
The present embodiment method as shown in Figure 1, unstripped gas enters in dynamic wave absorber 1 from bottom, bump against with the trapping solution of the contrary ejection of absorber overhead, force liquid radially from inner outside directive barrel, at gas, tuck in the liquid film foam area that interface zone forms strong turbulence, make liquid phase in froth zone, in Ci district because liquid surface upgrades greatly and rapidly, the impulse force of unstripped gas scatters absorption liquid to splash, absorption liquid and unstripped gas reach dynamic balancing place and form stable froth bed, and sour gas is absorbed.
Unstripped gas and trapping solution bump against in dynamic wave absorber 1, have absorbed CO
2trapping solution (rich solution) by absorber bottom, go out absorber, by dynamic wave circulating pump, send into solution heat exchanger 5, after lean solution heat exchange from the bottom of regenerator, by regenerator top, enter regenerator 6, the air lift steam counter-flow producing with tower bottom steam boiling device 7 from top to bottom contacts, and separates sucking-off CO wherein
2.The CO bearing again
2by tower top, discharge and obtain CO after cooling
2gas product; Lean solution after regeneration is discharged at the bottom of by regenerator, through solution heat exchanger 5 and rich solution heat exchange, after recovery section heat, enters lean solution cooler 3 and is further cooled to and absorbs temperature and enter dynamic wave absorber and recycle.
Application implementation 1:
Certain coal-burning boiler flue gas, 40～50 ℃ of temperature, flue gas composition (V%) N<sub TranNum="135">2</sub>82.9%, CO<sub TranNum="136">2</sub>12.5%, O<sub TranNum="137">2</sub>4.6%, SO<sub TranNum="138">2</sub>< 400mg/m<sup TranNum="139">3</sup>, NO<sub TranNum="140">x</sub>~ 700mg/m<sup TranNum="141">3</sup>.Adopt method trapping CO of the present invention<sub TranNum="142">2</sub>, absorber height is 2.3m, the MMEA of 3.3mol/L of take is absorbent, purified gas CO<sub TranNum="143">2</sub><2.3%, gas product (being regeneration gas) CO<sub TranNum="144">2</sub>>=99.5% (butt).
Adopt packed tower as absorption tower, tower height 6m, the MMEA of 3.3mol/L of take is absorbent, purified gas CO<sub TranNum="146">2</sub><2.5%, gas product (being regeneration gas) CO<sub TranNum="147">2</sub>>=99.5% (butt).
From above example, can find out, the inventive method has higher mass-transfer efficiency than conventional method, has significantly reduced the size of traditional absorption equipment.
Application implementation 2:
Certain coal-burning boiler flue gas, 40～50 ℃ of temperature, flue gas composition (V%) N<sub TranNum="151">2</sub>82.9%, CO<sub TranNum="152">2</sub>12.5%, O<sub TranNum="153">2</sub>4.6%, SO<sub TranNum="154">2</sub>< 400mg/m<sup TranNum="155">3</sup>, NO<sub TranNum="156">x</sub>~ 700mg/m<sup TranNum="157">3</sup>.Adopt method trapping CO of the present invention<sub TranNum="158">2</sub>, adopting the series connection of two-stage absorber, absorber height is 2.3m, the MMEA of 3.3mol/L of take is absorbent, purified gas CO<sub TranNum="159">2</sub><0.6%, gas product (being regeneration gas) CO<sub TranNum="160">2</sub>>=99.5% (butt).
Application implementation 3:
Certain coal-burning boiler flue gas, 40～50 ℃ of temperature, flue gas composition (V%) N<sub TranNum="163">2</sub>82.9%, CO<sub TranNum="164">2</sub>12.5%, O<sub TranNum="165">2</sub>4.6%, SO<sub TranNum="166">2</sub>< 400mg/m<sup TranNum="167">3</sup>, NO<sub TranNum="168">x</sub>~ 700mg/m<sup TranNum="169">3</sup>.Adopt method trapping CO of the present invention<sub TranNum="170">2</sub>, absorber height is 2.3m, the MMEA of 3.3mol/L of take is absorbent, purified gas CO<sub TranNum="171">2</sub><2.3%, gas product (being regeneration gas) CO<sub TranNum="172">2</sub>>=99.5% (butt).The MEA of 3.3mol/L of take is absorbent, purified gas CO<sub TranNum="173">2</sub><3.4%, gas product (being regeneration gas) CO<sub TranNum="174">2</sub>>=99.5% (butt).
Claims (6)
1. one kind adopts dynamic wave absorber trapping flue gas CO
2method, be to use a kind of CO
2the solvent that arresting efficiency is high or the formula solution of multi-solvents are made absorbent, it is characterized in that adopting dynamic wave absorber as absorption equipment, from containing CO
2air-flow remove CO
2.
2. method according to claim 1, is characterized in that containing CO
2source of the gas first in dynamic wave absorber by with trapping solvent contact the most of CO removing wherein
2, make used absorbent regeneration simultaneously, remove all or part of absorbed CO
2, and then be recycled to absorption step.
3. method according to claim 2, is characterized in that source of the gas is flue gas.
4. method according to claim 1 and 2, is characterized in that described dynamic wave absorber is contrainjection absorber, Jet absorber or foaming tower absorber in the same way.
5. method according to claim 1 and 2, is characterized in that described dynamic wave absorber arranges to strengthen assimilation effect by series multistage, efficiently removes CO in flue gas
2.
6. method according to claim 1 and 2, it is characterized in that trapping solvent is methyl monoethanolamine (MMEA), AEEA (AEEA), ammoniacal liquor, piperazine and various sterically hindered amines, and they are independent, composite or add different activator and use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210221466.5A CN103505985A (en) | 2012-06-30 | 2012-06-30 | Method for capturing flue gas CO2 by using power wave absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210221466.5A CN103505985A (en) | 2012-06-30 | 2012-06-30 | Method for capturing flue gas CO2 by using power wave absorber |
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|---|---|
| CN103505985A true CN103505985A (en) | 2014-01-15 |
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|---|---|---|---|
| CN201210221466.5A Pending CN103505985A (en) | 2012-06-30 | 2012-06-30 | Method for capturing flue gas CO2 by using power wave absorber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104815527A (en) * | 2015-04-14 | 2015-08-05 | 上海交通大学 | Inducing type dynamic wave washing tower device |
| CN106474886A (en) * | 2016-12-12 | 2017-03-08 | 中国矿业大学(北京) | A kind of industrial waste-gas purifier of low temperature plasma joint two-stage dynamic wave |
| CN106731600A (en) * | 2016-12-20 | 2017-05-31 | 新疆敦华石油技术股份有限公司 | A kind of collecting carbonic anhydride liquefying plant |
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| WO2004048642A1 (en) * | 2002-11-27 | 2004-06-10 | Teikoku Oil Co., Ltd. | Method for removing acidic gas from raw gas, and additive having corrosion suppressing effect and defoaming effect for addition to amine solution for removing acid gas |
| CN101423214A (en) * | 2008-11-20 | 2009-05-06 | 武汉凯迪电力环保有限公司 | Method for catching carbon dioxide in generating plant flue gas by ammonia process and equipment thereof |
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| CN101961589A (en) * | 2010-08-31 | 2011-02-02 | 华东理工大学 | Dynamic wave liquid seal tail gas absorption method and device |
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-
2012
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Patent Citations (5)
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| WO2004048642A1 (en) * | 2002-11-27 | 2004-06-10 | Teikoku Oil Co., Ltd. | Method for removing acidic gas from raw gas, and additive having corrosion suppressing effect and defoaming effect for addition to amine solution for removing acid gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104815527A (en) * | 2015-04-14 | 2015-08-05 | 上海交通大学 | Inducing type dynamic wave washing tower device |
| CN106474886A (en) * | 2016-12-12 | 2017-03-08 | 中国矿业大学(北京) | A kind of industrial waste-gas purifier of low temperature plasma joint two-stage dynamic wave |
| CN106731600A (en) * | 2016-12-20 | 2017-05-31 | 新疆敦华石油技术股份有限公司 | A kind of collecting carbonic anhydride liquefying plant |
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Application publication date: 20140115 |