CN102614748A - Ultrasonic reinforced membrane reactor for absorbing and gathering CO2 in flue gas - Google Patents
Ultrasonic reinforced membrane reactor for absorbing and gathering CO2 in flue gas Download PDFInfo
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- CN102614748A CN102614748A CN2012101051139A CN201210105113A CN102614748A CN 102614748 A CN102614748 A CN 102614748A CN 2012101051139 A CN2012101051139 A CN 2012101051139A CN 201210105113 A CN201210105113 A CN 201210105113A CN 102614748 A CN102614748 A CN 102614748A
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- ultrasonic wave
- absorption liquid
- flue gas
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Abstract
The invention belongs to the technical field of membrane separation, and relates to an ultrasonic reinforced membrane reactor for absorbing and gathering CO2 in flue gas, which comprises an ultrasonic membrane separator, a desorption device and an absorption liquid delivery pump. An ultrasonic membrane contactor is connected with the desorption device, the desorption device is used for desorption of absorption liquid flowing from the ultrasonic membrane contactor, the desorbed absorption liquid is delivered back to the ultrasonic membrane separator through the absorption liquid delivery pump, and the ultrasonic membrane separator comprises an ultrasonic container, an ultrasonic generation system, a membrane module, a first heater, a temperature controller and a temperature sensor, wherein the ultrasonic container is used for containing the absorption liquid, the membrane module is positioned in the ultrasonic container, the temperature sensor is used for detecting the temperature of the absorption liquid, and temperature signals generated by the temperature sensor are transmitted to the temperature controller. The ultrasonic reinforced membrane reactor for absorbing and gathering the CO2 in the flue gas has the advantages that membrane mass transfer efficiency is greatly enhanced, and the difference among absorption effects of different unit membrane areas is avoided.
Description
Technical field
The invention belongs to the membrane separation technique field, relate to a kind of being applicable to and absorb CO in the capture flue gas
2The film contact reactor.
Background technology
As everyone knows, the atmosphere greenhouse effects are environmental problems of the human present maximum that faces.(6 kinds of main greenhouse gas: CO in all gas of generation greenhouse effects
2, CH
4, N
2O, HFC
S, PFC
S, SF
6), CO
2Contribution to greenhouse effects is maximum, accounts for 55%.Therefore, control CO
2Discharging is the key of slowing down greenhouse effects.Thermal power plant is CO
2Concentrated emission source, its CO
2Discharge capacity accounts for the CO that mankind's activity causes
238% of total release.
At present, from burning and gas-exhausting, do all one can to reclaim CO
2Technology mainly contain physisorphtion, Physical Absorption method, chemical absorption method, membrane separation process etc.Though the physisorphtion technological operation is simple, application be the dry method system, can not consider that etching problem is simple to operate, be prone to realize automation CO
2The rate of recovery is low, and needs a large amount of adsorbents, and adsorption-desorption is frequent; The general absorbability of Physical Absorption method is big, and the amount of absorbing is few, and absorbent regeneration need not heating, but only is applicable to CO
2The partial pressure conditions of higher, CO
2Clearance lower; Though chemical absorption method is used in industry, still have certain limitation, because gas-liquid directly contacts, phenomenon such as occur bubble in the absorption tower, carry secretly, flue gas purification system is complicated, and energy consumption and investment are all very big; Membrane separation process is divided into gas film partition method and membrane contactor method according to the separating mechanism difference.At present, what mainly adopt is the membrane contactor method, and this method has combined the high selectivity of chemical absorption method and the facility compact property of gas separation membrane method to reach high efficiency separation CO
2Purpose, but the shortcoming of this method is an encapsulation difficulty, assembly is had relatively high expectations, thereby limited it in Industrial Application.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art, provide a kind of being applicable to absorb CO in the capture flue gas
2The film contact reactor, this kind film contact reactor can improve film and absorb to capture absorb CO in the flue gas
2Efficient, realize the effect that auxiliary film is cleaned and have the stability of a system.Technical scheme of the present invention is following:
A kind of ultrasonic strengthened membrane absorbs and captures CO in the flue gas
2Reactor, comprise ultrasonic wave membrane separator, desorption apparatus, absorption liquid delivery pump three parts, the ultrasonic wave membrane contactor links to each other with desorption apparatus; Desorption apparatus is used for that the adsorption liquid that flows into from the ultrasonic wave membrane contactor is carried out desorb to be handled; The absorption liquid of handling through desorb returns to the ultrasonic wave membrane separator through the absorption liquid delivery pump, and wherein, the ultrasonic wave membrane separator comprises ultrasonic wave container, ultrasonic wave generation systems, membrane module; Primary heater (10), temperature controller and temperature sensor; In the ultrasonic wave container absorption liquid is housed, membrane module is positioned at the ultrasonic wave container, and temperature sensor is used to detect the temperature of absorption liquid; The temperature signal of its generation is admitted to temperature controller, is controlled the work of primary heater (10) according to temperature signal by temperature controller; The ultrasonic wave generation systems is used to produce ultrasonic wave.
As preferred implementation; Described desorption apparatus comprises separates bothrium, secondary heater (6) and heat exchanger; Secondary heater (6) is used for the absorption liquid that flows in the desorb groove is heated; The absorption liquid of process heating desorption is returned to the ultrasonic wave container through the absorption liquid delivery pump again through after the cooling of heat exchanger; Described ultrasonic wave container is a closed container, and it is provided with Pressure gauge; Porch and exit at membrane module are provided with CO
2Concentration is carried out the instrument of assay determination; Link to each other with absorption liquid fluid infusion jar at described ultrasonic wave membrane separator, according to the CO of porch and exit mensuration
2Concentration to the fluid infusion of ultrasonic wave membrane separator, is added fresh absorption liquid and is regulated degree of carbonisation about 0.1; Can the temperature control of temperature controller be set in 50 °, when the temperature signal of absorption liquid reaches 60 °, stop the ultrasonic wave generation systems, when treating that temperature is reduced to 50 ℃, open the ultrasonic wave generation systems again; The material that membrane module adopted is a hydrophobicity PVDF hollow-fibre membrane, and film silk internal diameter is 0.8mm, and wall thickness 0.15mm contact angle is greater than 83 °; The ultrasonic frequency that said ultrasonic wave generation systems produces is 20KHz, and ultrasonic power is 300W.
The present invention compared with prior art has the following advantages:
(1) under the ultrasonic wave effect, the resistance to mass tranfer of fluid reduces, and diffusion coefficient improves, and mass tranfer coefficient increases, and has promoted CO
2Reaction efficiency with absorption liquid has improved CO
2Removal effect.
(2) utilize the cleaning action of ultrasonic wave, improved the pollution problem of film, avoided because the heterogeneity that flows causes treating capacity difference and the absorption liquid dead band and the channeling of different membrane areas to hollow-fibre membrane.
(3) CO in the conventional film contactor to trap flue gas
2The membrane modules that have shell that adopt more; And the membrane module among the present invention has saved shell; Adopt the absorption pattern of immersion; Increased the gas-liquid contact area, promoted the film absorption efficiency, avoided because the influence of the interaction partners mass transfer of the inhomogeneities of the doughnut filling that shell causes and fluid and shell.
Description of drawings
Fig. 1 captures CO in the flue gas for ultrasonic strengthened membrane absorbs
2The device sketch map of reactor; 1 ultrasound reactor wherein, 2 ultrasonic wave controllers, 3 membrane modules, 4 gas approach; 5 resolve groove, 6 heating rods, 7 heat exchangers, 8 absorption liquid delivery pumps; 9 waste liquid outlets, 10 heating jackets, 11 ultrasonic transducers, 12 temperature controllers; 13 temperature sensors, 14 exhanst gas outlets, 15 Pressure gauges, 16 absorption liquids are added jar.
The specific embodiment
Ultrasonic wave is meant the sound wave of frequency at 20kHz～10MHz, and it can be propagated in gas, liquid or solid.When ultrasonic wave is propagated in liquid, the cavitation that the interaction between ultrasonic wave and the liquid mainly relies on ultrasonic wave to produce.So-called ultrasonic cavitation is meant that the vibration of small cavitation bubble in the liquid (vacuum bubbles or contain gas and the bubble of steam) under the sound wave effect, growth, contraction are until a series of processes of collapsing.
The present invention is applied in membrane absorption method with ultrasonic technology and captures CO in the flue gas
2Technical field in.Ultrasonic strengthened membrane absorbs and captures CO in the flue gas
2Follow mechanical effects such as microjet that ultrasonic cavitation produces, shock wave not only can cause the macroscopical turbulence of flow and the high velocity impact of solids; The eddy current diffusion is strengthened; And the effect that liquid-liquid interface and liquid-solid boundary are had impact, peel off, corrode, and then make boundary be able to upgrade; For many microporous mediums such as hollow-fibre membrane, the perturbation action usefulness that the microjet shock wave produces is strengthened the interior material diffusion of micropore.Simultaneously, hyperacoustic heat effect can cause the rising of absorption liquid temperature, to a certain degree the rising of temperature; Make the viscosity of absorption liquid descend; The mobility status of liquid improves in the membrane contactor, and absorption liquid distributes more uniformly, and makes the boundary layer attenuation of absorption liquid mass transfer; Reduce the resistance to mass tranfer of liquid phase, thereby helped CO
2Diffusion and absorption, therefore improved CO to a certain extent
2The rate of recovery and membrane flux.
Ultrasonic strengthened membrane of the present invention absorbs and captures CO in the flue gas
2Reactor mainly constitute by three parts: ultrasonic wave membrane separator, desorption apparatus, absorption liquid delivery pump.Wherein membrane module is immersed in the supersonic generator, links to each other with heat exchanger and absorption liquid delivery pump with the absorption liquid resolver again.
Wherein the ultrasonic wave membrane separator is by ultrasonic wave container 1 (this ultrasonic wave container is a stainless steel slot type container), ultrasonic wave generation systems, membrane module 3, and temperature control system, absorption liquid is added jars 16 and is formed with reactor pressure table 15; The ultrasonic wave generation systems comprises ultrasonic transducer 11 and ultrasonic wave controller 2, and wherein ultrasonic transducer 11 is positioned at the container low side, and the ultrasonic wave control device is positioned at container outer surface, can control ultrasonic frequency and power and be respectively 20KHz and 300W; Membrane module 3 is immersed in the ultrasonic wave container 1, and absorption liquid is added jar 16 and is positioned at container head with Pressure gauge 15, the integral container sealing; Temperature control system comprises heating jacket 10 and temperature sensor 13; Heating jacket 10 is positioned at ultrasonic wave container bottom, and temperature sensor 13 is between membrane module 3 and ultrasonic wave chamber wall, and the temperature controller 12 outer with container links to each other; Temperature controller 12 is according to the work of the temperature signal control heating jacket 10 of temperature sensor 13 inputs; Thereby the temperature of absorption liquid in the control ultrasonic wave container, temperature controller 12 also has display, can show the temperature of absorption liquid.
Desorption apparatus is formed with heating tube 6 and heat exchanger 7 by resolving groove 5, is stainless steel.Mainly be to the absorption liquid desorption recycle and reuse.The effect of heat exchanger 7 and absorption liquid delivery pump 8 is the absorption liquid after resolving to be lowered the temperature to handle to be transported to circulate in the ultrasonic wave container 1 through the absorption liquid delivery pump then absorb the CO in the flue gas
2
Among the present invention, mixed flue gas is walked tube side, gets into the other end from membrane module 3 one ends and flows out, and imports and exports flue gas and all adopts flue gas analyzer to the CO in the flue gas
2Concentration is carried out assay determination.Absorption liquid and flue gas lay respectively at the membranous wall both sides, and the absorption liquid in the control reactor is 50 ℃, and transmembrane pressure is under the situation less than 0.5Mpa; Absorption liquid and flue gas form the type of flow of cross-flow; The absorption liquid that flows out is again through separating bothrium 5 heating desorptions, and keeping the time of staying of absorption liquid in resolving groove is 40min, makes the abundant desorb of absorption liquid; Absorption liquid after the desorb gets into heat exchanger 7 and lowers the temperature; Through circulating pump absorption liquid is transported in the reactor 1 again, the circular flow in the liquid road of the absorption liquid in the whole system, desorb limit, limit absorbs.Simultaneously, behind circulating pump, be provided with discard solution discharge port 9, when the absorption liquid degree of carbonisation reaches 0.45 left and right sides, discharge 20% waste liquid, adding fresh absorption liquid adjusting degree of carbonisation is about 0.1.Absorption liquid in the reactor utilizes heating jacket 10 to its heating, and temperature can be set through temperature controller 12, make absorption liquid under 50 ℃ to CO
2Absorb; Because the cavitation that ultrasonic wave produces can produce certain heat; When absorption liquid rises to 60 ℃ along with the ultrasonic wave operative temperature, stop the ultrasonic wave absorption and change common absorption into, treat to continue when temperature drops to 50 ℃ the ultrasonic wave film and absorb, adopt intermittently operated technology.
Claims (8)
1. a ultrasonic strengthened membrane absorbs and captures CO in the flue gas
2Reactor, comprise ultrasonic wave membrane separator, desorption apparatus, absorption liquid delivery pump three parts, the ultrasonic wave membrane contactor links to each other with desorption apparatus; Desorption apparatus is used for that the adsorption liquid that flows into from the ultrasonic wave membrane contactor is carried out desorb to be handled; The absorption liquid of handling through desorb returns to the ultrasonic wave membrane separator through the absorption liquid delivery pump, and wherein, the ultrasonic wave membrane separator comprises ultrasonic wave container, ultrasonic wave generation systems, membrane module; Primary heater (10), temperature controller and temperature sensor; In the ultrasonic wave container absorption liquid is housed, membrane module is positioned at the ultrasonic wave container, and temperature sensor is used to detect the temperature of absorption liquid; The temperature signal of its generation is admitted to temperature controller, is controlled the work of primary heater (10) according to temperature signal by temperature controller; The ultrasonic wave generation systems is used to produce ultrasonic wave.
2. ultrasonic strengthened membrane according to claim 1 absorbs and captures CO in the flue gas
2Reactor; It is characterized in that; Described desorption apparatus comprises separates bothrium, secondary heater (6) and heat exchanger; Secondary heater (6) is used for the absorption liquid that flows in the desorb groove is heated, and the absorption liquid of process heating desorption is returned to the ultrasonic wave container through the absorption liquid delivery pump again through after the cooling of heat exchanger.
3. ultrasonic strengthened membrane according to claim 1 absorbs and captures CO in the flue gas
2Reactor, it is characterized in that described ultrasonic wave container is a closed container, it is provided with Pressure gauge.
4. ultrasonic strengthened membrane according to claim 1 absorbs and captures CO in the flue gas
2Reactor, it is characterized in that, be provided with CO in the porch and the exit of membrane module
2Concentration is carried out the instrument of assay determination.
5. ultrasonic strengthened membrane according to claim 4 absorbs and captures CO in the flue gas
2Reactor, it is characterized in that described ultrasonic wave membrane separator links to each other with absorption liquid fluid infusion jar, the CO that measures according to porch and exit
2Concentration to the fluid infusion of ultrasonic wave membrane separator, is added fresh absorption liquid and is regulated degree of carbonisation about 0.1.
6. ultrasonic strengthened membrane according to claim 4 absorbs and captures CO in the flue gas
2Reactor, it is characterized in that, the control of the temperature of temperature controller is set in 50 °, when the temperature signal of absorption liquid reaches 60 °, stop the ultrasonic wave generation systems, when treating that temperature is reduced to 50 ℃, open the ultrasonic wave generation systems again.
7. ultrasonic strengthened membrane according to claim 1 absorbs and captures CO in the flue gas
2Reactor, it is characterized in that the material that membrane module adopted is a hydrophobicity PVDF hollow-fibre membrane, film silk internal diameter is 0.8mm, wall thickness 0.15mm contact angle is greater than 83 °.
8. ultrasonic strengthened membrane according to claim 1 absorbs and captures CO in the flue gas
2Reactor, it is characterized in that the ultrasonic frequency that said ultrasonic wave generation systems produces is 20KHz, ultrasonic power is 300W.
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| CN2012101051139A CN102614748A (en) | 2012-04-12 | 2012-04-12 | Ultrasonic reinforced membrane reactor for absorbing and gathering CO2 in flue gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106731427A (en) * | 2017-03-17 | 2017-05-31 | 宁波工程学院 | A kind of spray drying FGD process system of sound wave auxiliary |
| CN108101058A (en) * | 2016-11-24 | 2018-06-01 | 财团法人工业技术研究院 | Carbon dioxide capture device and system and method thereof |
| CN112619374A (en) * | 2020-09-14 | 2021-04-09 | 俞德宏 | Waste gas treatment method |
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| CN1672775A (en) * | 2005-01-10 | 2005-09-28 | 西安建筑科技大学 | Device and method for eliminating SO2 from gas with combined ultrasonic wave and hollow fiber containing soaked film |
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| CN1672775A (en) * | 2005-01-10 | 2005-09-28 | 西安建筑科技大学 | Device and method for eliminating SO2 from gas with combined ultrasonic wave and hollow fiber containing soaked film |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108101058A (en) * | 2016-11-24 | 2018-06-01 | 财团法人工业技术研究院 | Carbon dioxide capture device and system and method thereof |
| CN108101058B (en) * | 2016-11-24 | 2021-03-02 | 财团法人工业技术研究院 | Carbon dioxide capture device and system and method thereof |
| CN106731427A (en) * | 2017-03-17 | 2017-05-31 | 宁波工程学院 | A kind of spray drying FGD process system of sound wave auxiliary |
| CN112619374A (en) * | 2020-09-14 | 2021-04-09 | 俞德宏 | Waste gas treatment method |
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Application publication date: 20120801 |