CN102114359A - Micro-cyclone liquid collecting method and device for regeneration gas of flue gas and carbon dioxide capture system - Google Patents
Micro-cyclone liquid collecting method and device for regeneration gas of flue gas and carbon dioxide capture system Download PDFInfo
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- CN102114359A CN102114359A CN2011100060136A CN201110006013A CN102114359A CN 102114359 A CN102114359 A CN 102114359A CN 2011100060136 A CN2011100060136 A CN 2011100060136A CN 201110006013 A CN201110006013 A CN 201110006013A CN 102114359 A CN102114359 A CN 102114359A
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Abstract
The invention relates to a micro-cyclone liquid collecting method and device for regeneration gas of a flue gas and carbon dioxide capture system. The method comprises the following steps: (a) carrying out air cooling and water cooling on the regeneration gas from a regenerating column so as to convert the serotonin solution-containing saturated steam carried in the regeneration gas into fog drops, thus obtaining regeneration gas carrying aerosol particles; (b) performing gas-liquid micro-cyclone separation on the regeneration gas carrying aerosol particles so as to capture the aerosol particles carried in the regeneration gas so as to obtain aerosol particle-removed regeneration gas; and (c) collecting the captured aerosol particles into a liquid, and directly returning the liquid to the serotonin solution system together with the serotonin solution output from the bottom of a regenerating tower.
Description
Technical field
The invention belongs to the energy environment field, the little eddy flow that relates to a kind of flue gas carbon dioxide capture system regeneration gas is received the liquid method, specifically, relate to a kind of method that the saturated vapor liquefaction that contains varies solution of carrying secretly in the regeneration gas is also removed, and implement the used device of this method.
Background technology
Along with the development of economic society, air pollution that combustion of fossil fuel caused and greenhouse effects have seriously threatened human earth environment of depending on for existence, and global warming and greenhouse effects are common challenges that various countries' sustainable development faces.
According to the report of IPCC (The Intergovernmental Panel on Climate Change) (Intergovernmental Panel on Climate Change of the United Nations), cause the CO of global warming
2, CH
4, N
2In O, the hydrogen fluorohydrocarbon 4 class gases, CO
2The greenhouse effects that produce account for 60%, therefore, reduce CO
2Discharging become one of most important technology path of reply climate warming.Reduce CO
2Discharging mainly contains following 3 kinds of approach: 1. readjust the energy structure, use the carbon-free or low-carbon (LC) energy, as clean energy resourcies such as regenerative resource such as solar energy, wind energy and nuclear energy; 2. improve efficiency of energy utilization, reduce the greenhouse gas emissions of the energy consumption per unit of output value; 3. adopt the capture of greenhouse gases and seal (CCS) technology up for safekeeping.The result of study of IEA (International Energy Agency) shows: be under 50 dollars/ton the situation at carbon tax, and the year two thousand fifty CO
2Half of CER will rely on CO
2Capturing and seal up for safekeeping (CCS) realizes.Therefore, research CO
2Trapping technique is significant to reduction of greenhouse gas discharge.
The carbon trapping technique of developing energetically mainly contains 3 kinds at present, i.e. decarburization and oxygen-enriched combustion technology before burning back decarburization, the burning.Wherein capturing technology can only be used for newly-built power plant before the burning, and two kinds of technology then can be applied to newly-built and existing power plant simultaneously in addition.
Chinese as a developing country, main consumption, main CO based on coal
2Emission source is coal-fired power plant.On total amount, the CO2 emissions of China have occupied the second in the world at present.Expect 2025, the CO of China
2Total release surpasses the U.S. probably, occupies the first in the world.Therefore, China demands urgently and need catch research to the carbon dioxide that is discharged, to alleviate the air pollution pressure of China.
Expensive will be a big obstacle that hinders carbon dioxide capture and bury the technical marketization, and therefore newly-built power plant will increase the cost of 30-50%, transform the cost of electricity-generating that existing power plant also can significantly increase the power plant.Present price still is difficult to bear for Chinese electricity power enterprise, but Chinese newly-built power plant should do some preparations to this technology in future plan, and the soil of reserving certain area is as deposit.Carbon dioxide capture after the commercialization and the price of burying technology must descend, and along with the development of international and Chinese domestic energy-saving and emission-reduction, this class technology will be used widely.
In the flue gas carbon dioxide capture system, be entrained with the varies solution particulates in the regeneration gas carbon dioxide, can produce harmful effect, contaminated environment even to follow up device and processing.In addition, aerosol particles runs off, collecting carbonic anhydride device as 1,000,000 tons of/year scales, about 1600 tons/year of the annual varies liquid solvent that consumes, be worth 4,000 ten thousand yuans, 80% is to be cleaned gas with aerocolloidal form to have taken away in the double solvents of these consumption, PM2.5 particulate (diameter is less than or equal to 2.5 microns particle in the atmosphere) especially, and how reclaiming these aerosol particles is key technical problems that the energy environment field faces.The capture method of existing aerosol particles has rotating flow separator and electric fishing storage, the former pressure falls and is generally 500-600Pa, even up to more than the 1000Pa, existing this technology can not be used for the flue gas carbon dioxide capture system, the one, pressure falls too high, and the flue gas of low dividing potential drop can not be supported high like this pressure consumption reduction; The 2nd, if select existing cyclone separator technology for use, must carry out supercharging, not only complexity but also uneconomical to flue gas.For the electric fishing storage, because the regeneration gas water content is big, be easy to generate potential safety hazard, and cost is too high, in engineering, there is not economic and practical electric fishing storage.
Given this, this area presses for a kind of method that can efficiently the saturated vapor liquefaction that contains varies solution of carrying secretly in the regeneration gas also be removed of developing.
Summary of the invention
The little eddy flow that the invention provides a kind of new flue gas carbon dioxide capture system regeneration gas is received the liquid method and apparatus, has overcome the defective that exists in the prior art.
On the one hand, the little eddy flow that the invention provides a kind of flue gas carbon dioxide capture system regeneration gas is received the liquid method, and this method comprises:
(a) regeneration gas that derives from regenerator is carried out air-cooled and water-cooled, change into droplet, obtain carrying secretly the regeneration gas of aerosol particles with the saturated vapor that contains varies solution that will carry secretly in the regeneration gas;
(b) regeneration gas of carrying aerosol particles secretly is carried out the little rotating flow of solution-air and separate,, obtain removing the regeneration gas of aerosol particles to catch the aerosol particles of carrying secretly in the regeneration gas;
(c) aerosol particles of catching is assembled be liquid, and the varies solution of output directly returns the varies solution system at the bottom of the regenerator.
One preferred embodiment in, after the little rotating flow of the solution-air of step (b) separated, the concentration of aerosol particles was less than 20mg/Nm in the regeneration gas
3
Another preferred embodiment in, after the little rotating flow of the solution-air of step (b) separated, the average grain diameter of aerosol particles was not more than 2.5 microns in the regeneration gas.
Another preferred embodiment in, after the little rotating flow of the solution-air of step (b) separated, the rated pressure of regeneration gas was reduced to 20mm H
2O, maximum pressure fall and are not more than 30mm H
2O.
Another preferred embodiment in, use step (c), make the consumption of varies solution reduce half.
On the other hand, the little eddy flow that the invention provides a kind of flue gas carbon dioxide capture system regeneration gas is received liquid device, and this device comprises:
The air-cooled cooler that is connected with the regeneration gas outlet of regenerator, and the water-cooled cooler that is connected with the outlet of air-cooled cooler, be used for the regeneration gas that derives from regenerator is carried out air-cooled and water-cooled, change into droplet with the saturated vapor that contains varies solution that will carry secretly in the regeneration gas, obtain carrying secretly the regeneration gas of aerosol particles;
The little rotating flow separator of solution-air that is connected with the outlet of water-cooled cooler is used for that the regeneration gas of carrying aerosol particles secretly is carried out the little rotating flow of solution-air and separates, and to catch the aerosol particles of carrying secretly in the regeneration gas, obtains removing the regeneration gas of aerosol particles.
One preferred embodiment in, the little rotating flow separator of described solution-air (4) be single-stage or plural serial stage.
Description of drawings
Fig. 1 is the little eddy flow liquid process schematic flow sheet according to the flue gas carbon dioxide capture system regeneration gas of an embodiment of the invention.
The specific embodiment
The present inventor finds through after the extensive and deep research, from the regeneration gas carbon dioxide of regenerator output, carried the saturated vapor that contains varies solution in a large number secretly in the flue gas carbon dioxide capture system, as it not being removed, can reduce the quality of regeneration gas carbon dioxide greatly, to follow-up seal up for safekeeping to cause with commercial Application have a strong impact on, and the carrying secretly to run to decrease of a large amount of varies solution also can cause the operating cost of flue gas collecting carbonic anhydride device to increase substantially, and economic benefit is greatly affected; Adopt air-cooled cooler and water-cooled cooler series connection cooling regeneration gas carbon dioxide, the saturated vapor of carrying secretly in the regeneration gas that contains varies solution is liquefied as droplet to greatest extent, just can efficiently remove aerosol particles by ultra low pressure drop, high score from little rotating flow separator of precision so again, regeneration gas is purified; To catch the aerosol particles that gets off again and assemble and be liquid, and the varies solution of output directly returns the varies solution system and carries out recyclingly at the bottom of the regenerator, can improve the purity of regeneration gas, and make the consumption of varies solution reduce about 50%.Based on above-mentioned discovery, the present invention is accomplished.
Technical conceive of the present invention is as follows:
1. the regeneration gas (main carbonated) of regenerator preparation is carried out air-cooled and water-cooled,, obtain carrying secretly the regeneration gas of aerosol particles so that the saturated vapor of carrying secretly in the regeneration gas that contains varies solution is changed into droplet;
2. the regeneration gas of carrying aerosol particles secretly is carried out the little rotating flow of the solution-air of ultra low pressure drop and separate, to catch the aerosol particles of carrying secretly in the regeneration gas, the regeneration gas that removes behind the aerosol particles is used for follow-up workshop section;
3. will catch the aerosol particles that gets off and assemble and be liquid, and the varies solution of output directly returns the varies solution system at the bottom of the regenerator.
In a first aspect of the present invention, provide a kind of little eddy flow of flue gas carbon dioxide capture system regeneration gas to receive the liquid method, this method comprises:
(a) regeneration gas (main carbonated) of regenerator preparation is carried out air-cooled and water-cooled,, obtain carrying secretly the regeneration gas of aerosol particles so that the saturated vapor of carrying secretly in the regeneration gas that contains varies solution is changed into droplet;
(b) regeneration gas of carrying aerosol particles secretly is carried out the little rotating flow of the solution-air of ultra low pressure drop and separate, to catch the aerosol particles of carrying secretly in the regeneration gas, the regeneration gas that removes behind the aerosol particles is used for follow-up workshop section;
(c) will catch the aerosol particles that gets off and assemble and be liquid, and the varies solution of output directly returns the varies solution system at the bottom of the regenerator.
In the present invention, after little rotating flow separating treatment of step (b), the concentration of aerosol particles is less than 20mg/Nm in the regeneration gas
3
In the present invention, after little rotating flow separating treatment of step (b), the average grain diameter of aerosol particles is not more than 2.5 microns in the regeneration gas.
In the present invention, after little rotating flow separating treatment of step (b), the rated pressure of regeneration gas is reduced to 20mmH
2O, maximum pressure fall and are not more than 30mm H
2O.
In a second aspect of the present invention, provide a kind of little eddy flow of flue gas carbon dioxide capture system regeneration gas to receive liquid device, this device comprises:
Be positioned at device regenerator foremost, be used to prepare the regeneration gas carbon dioxide;
Air-cooled cooler with the regeneration gas outlet of regenerator links to each other is used for carrying out air-cooled to regeneration gas;
The water-cooled cooler that links to each other with the outlet of air-cooled cooler is used for regeneration gas is carried out water-cooled;
The little rotating flow separator of solution-air of the ultra low pressure drop that links to each other with the outlet of water-cooled cooler, the aerosol particles that is used for that regeneration gas is carried secretly carry out little rotating flow to be separated, both purifying regeneration gas, the aerosol particles of carrying secretly in the reclaiming gas again.
In the present invention, catch the aerosol particles that gets off through little rotating flow separator of ultra low pressure drop and directly return the varies solution system and carry out recyclingly, the consumption of varies solution has been reduced about 50%.
In the present invention, little rotating flow separator of described ultra low pressure drop can be arranged by series multistage and strengthen separating effect, efficiently remove the aerosol particles of carrying secretly in the regeneration gas.
Below referring to accompanying drawing.
Fig. 1 is the little eddy flow liquid process schematic flow sheet according to the flue gas carbon dioxide capture system regeneration gas of an embodiment of the invention.As shown in Figure 1, (the varies rich solution enters from tower top, CO from regenerator 1
2Gas enters from the tower bottom) the regeneration gas CO that discharges of regeneration gas outlet
2Gas enters air-cooled cooler 2 successively and water-cooled cooler 3 carries out air-cooled and water-cooled, so that be droplet with the steam-reforming of carrying secretly in the regeneration gas; Regeneration gas after the process cooling processing enters the little rotating flow separation of solution-air that the little rotating flow separator 4 of solution-air carries out ultra low pressure drop from the outlet of water-cooled cooler 3, to remove the aerosol particles of carrying secretly in the regeneration gas, CO
2Gas uses for follow-up workshop section from mouthful discharge that ejects of the little rotating flow separator 4 of solution-air; The aerosol particles that reclaims is assembled and is liquid (varies solution), and the varies solution of output directly returns in the varies solution system recycling at the bottom of the regenerator.
The major advantage of method and apparatus of the present invention is:
The inventive method technology advanced person, cycle of oparation is long, and volume is little, and fault rate is low, has improved the purity of regeneration gas, and the consumption of varies solution has been reduced about 50%.
Embodiment
Further set forth the present invention below in conjunction with specific embodiment.But, should be understood that these embodiment only are used to the present invention is described and do not constitute limitation of the scope of the invention.The test method of unreceipted actual conditions in the following example, usually according to normal condition, or the condition of advising according to manufacturer.Except as otherwise noted, all percentage and umber are by weight.
Embodiment 1: 1,000,000 tons of/year flue gases of Sinopec Research Institute of Nanjing Chemical Industry Group reclaim carbon dioxide plant technology bag
Technological process:
This process using device of the present invention, its technological process is as above shown in Figure 1.
Little rotating flow separator of the HL/G type ultra low pressure drop of this independent development of process using East China University of Science removes the aerosol particles of carrying secretly in the regeneration gas.Following table is the physical parameter of little rotating flow separator inlet feed of ultra low pressure drop:
| | Title | Parameter | |
| 1 | Handle tolerance | 63640Nm
3/ |
|
| 2 | Operating temperature | 40 |
|
| 3 | Operating pressure | 50kpa | |
| 4 | N 2Content | 0.5％ |
| 5 | CO 2Content | 99.5％ |
| 6 | SO 2Content | ＜400mg/m 3 |
| 7 | Moisture content | Saturated |
Technique effect:
Little rotating flow separator of this ultra low pressure drop is under metered flow, when the concentration of import aerosol particles is not more than 1500mg/m
3The time, the concentration of gaseous phase outlet aerosol particles is not more than 20mg/m
3, and the equipment operating pressure falls and is not more than 0.0002MPa under standard state, amounts to 20mm water column height.
Little eddy flow of this cover flue gas carbon dioxide capture system regeneration gas is received liquid device, since 1,000,000 tons of/year flue gases recovery of Sinopec Research Institute of Nanjing Chemical Industry Group carbon dioxide project comes into operation, operate steadily, easy to operate, be easy to control, reach and satisfied industrial production and environmental harmony requirement, it has improved the purity of regeneration gas, and the consumption of varies solution has been reduced about 50%.
All quote in this application as a reference at all documents that the present invention mentions, just quoted as a reference separately as each piece document.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after having read above-mentioned instruction content of the present invention, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Claims (7)
1. little eddy flow of a flue gas carbon dioxide capture system regeneration gas is received the liquid method, and this method comprises:
(a) regeneration gas that derives from regenerator is carried out air-cooled and water-cooled, change into droplet, obtain carrying secretly the regeneration gas of aerosol particles with the saturated vapor that contains varies solution that will carry secretly in the regeneration gas;
(b) regeneration gas of carrying aerosol particles secretly is carried out the little rotating flow of solution-air and separate,, obtain removing the regeneration gas of aerosol particles to catch the aerosol particles of carrying secretly in the regeneration gas;
(c) aerosol particles of catching is assembled be liquid, and the varies solution of output directly returns the varies solution system at the bottom of the regenerator.
2. the method for claim 1 is characterized in that, after the little rotating flow of the solution-air of step (b) separated, the concentration of aerosol particles was less than 20mg/Nm in the regeneration gas
3
3. the method for claim 1 is characterized in that, after the little rotating flow of the solution-air of step (b) separated, the average grain diameter of aerosol particles was not more than 2.5 microns in the regeneration gas.
4. the method for claim 1 is characterized in that, after the little rotating flow of the solution-air of step (b) separated, the rated pressure of regeneration gas was reduced to 20mm H
2O, maximum pressure fall and are not more than 30mm H
2O.
5. the method for claim 1 is characterized in that, uses step (c), makes the consumption of varies solution reduce half.
6. little eddy flow of a flue gas carbon dioxide capture system regeneration gas is received liquid device, and this device comprises:
The air-cooled cooler (2) that is connected with the regeneration gas outlet of regenerator (1), and the water-cooled cooler (3) that is connected with the outlet of air-cooled cooler (2), be used for the regeneration gas that derives from regenerator is carried out air-cooled and water-cooled, change into droplet with the saturated vapor that contains varies solution that will carry secretly in the regeneration gas, obtain carrying secretly the regeneration gas of aerosol particles;
The little rotating flow separator of solution-air (4) that is connected with the outlet of water-cooled cooler (3), being used for that the regeneration gas of carrying aerosol particles secretly is carried out the little rotating flow of solution-air separates, to catch the aerosol particles of carrying secretly in the regeneration gas, obtain removing the regeneration gas of aerosol particles.
7. device as claimed in claim 6 is characterized in that, the little rotating flow separator of described solution-air (4) be single-stage or plural serial stage.
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Cited By (5)
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| WO2012136039A1 (en) * | 2011-04-06 | 2012-10-11 | 上海华畅环保设备发展有限公司 | Method and apparatus for micro-hydrocyclone purification for flue gas carbon dioxide capture system |
| CN102895794A (en) * | 2012-09-27 | 2013-01-30 | 无锡市华亨海洋生物工程有限公司 | Device for treating fish meal odor |
| CN102913486A (en) * | 2011-08-05 | 2013-02-06 | 曹军 | Cooling device of air-cooled oil cooler |
| CN103143223A (en) * | 2013-03-08 | 2013-06-12 | 上海华畅环保设备发展有限公司 | Method and device for rotational-flow purifying treatment of chimney discharge smoke |
| CN104014202A (en) * | 2014-05-15 | 2014-09-03 | 华东理工大学 | Combined vapor-liquid separation method and device in pressurized water reactor nuclear power station vapor generator |
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| US9533247B2 (en) | 2011-04-06 | 2017-01-03 | Shanghai Huachang Environmental Protection Co., Ltd | Method and apparatus for micro-hydrocyclone purification for flue gas carbon dioxide capture system |
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| CN104014202B (en) * | 2014-05-15 | 2016-02-03 | 华东理工大学 | Vapour-liquid separation method and device is combined in pressurized water reactor nuclear power station steam generator |
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Application publication date: 20110706 |