CN207805334U - The trapping retracting device of carbon dioxide in flue gas - Google Patents
The trapping retracting device of carbon dioxide in flue gas Download PDFInfo
- Publication number
- CN207805334U CN207805334U CN201721608062.6U CN201721608062U CN207805334U CN 207805334 U CN207805334 U CN 207805334U CN 201721608062 U CN201721608062 U CN 201721608062U CN 207805334 U CN207805334 U CN 207805334U
- Authority
- CN
- China
- Prior art keywords
- gas
- high pressure
- outlet
- carbon dioxide
- flue gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- Y02P20/10—Process efficiency
-
- 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
-
- 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
- Y02P20/50—Improvements relating to the production of bulk chemicals
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model provides a kind of trapping retracting device of carbon dioxide in flue gas.The device includes smoke processing system, the first film separation unit, the second film separation unit and high pressure energy retracting device, and smoke processing system is provided with processing import and processing exports, and smoke processing system is for handling flue gas；First film separation unit is provided with the first air inlet, the first carbon dioxide enriched gas outlet and the outlet of the first high pressure non-permeate gas, the first air inlet and is connected with processing outlet；Second film separation unit is provided with the second air inlet, the outlet of carbon dioxide product gas and the outlet of the second high pressure non-permeate gas, and the second air inlet is connected with the first carbon dioxide enriched gas outlet；High pressure energy retracting device is connected with the outlet of the first high pressure non-permeate gas, and high pressure energy retracting device is used to recycle the pressure energy of the high pressure gas of the first high pressure non-permeate gas outlet output.The CO in recovered flue gas can be more effectively trapped using device provided by the utility model2。
Description
Technical field
The utility model is related to gas recovery techniques fields, in particular to a kind of trapping of carbon dioxide in flue gas
Retracting device.
Background technology
Global warming is one of current environmental problem main in the world, in the various greenhouse gases for leading to climate change
In, CO2Heating up on the earth, it is maximum to influence, and controls CO2Discharge has become one of the important technology route of reply climate warming.The mankind
The CO that activity generates2It discharges most parts and comes from coal fired power generation, CO in the combustion tail gas of coal-burning power plant2Discharge has concentration
It is low, stable, collection dosis neutralisata it is big the features such as, be extensive emission reduction CO2One of best field.
The CO of high-purity2It is a kind of important industrial gasses, the CO of separation and collection2Oil and natural gas can not only be injected
The rate of oil and gas recovery is improved in field, can also be widely used in anthropogenics, manufacture soda etc., realize recycling.
Coal-burning power plant CO2Separation and collection technology has a extensive future, and has significant environmental benefit, economic benefit and social benefit.Cause
This, separation and collection CO2Technology is to be related to the important technology of coal-burning power plant's reduction of greenhouse gas discharge.
CO at present2Trapping recovery method in, membrane separation process is one of more effective method.The main original of membrane separation process
When reason is that two or more admixture of gas passes through polymeric membrane, due to solubility of the various gases in film and diffusion
The difference of coefficient causes gas with various relative permeation rates in film variant.The wherein relatively fast gas of infiltration rate, such as two
Carbonoxide, vapor, hydrogen, helium, hydrogen sulfide etc. can be preferentially enriched with by permeable membrane；And infiltration rate is relatively slow
Gas, the delay side in film if the gases such as methane, nitrogen, carbon monoxide is enriched with, it is detached to reach mixed gas
Purpose.Compared with other methods, UF membrane traps CO2With without chemically reacting, not will produce pollutant, low energy consumption, equipment knot
Structure is compact, floor space is small, and the investment payback time is short, start flexibly, safeguard and the advantages such as operating cost is low.
However, for coal-burning power plant, since the exhaust gas volumn of its generation is huge, it is desirable that the CO of trapping2Amount is also huge, for list
A power plant, usual amount of collected need 1,000,000 tons/year, cause to handle coal-burning power plant's cigarette using membrane separation process in prior art processes
Still there are problems that enrichment degree is low, complex process when gas.And solid particle polluter and liquid impurity in coal-fired plant flue gas
Content is higher, is easy to pollute membrane separation assemblies and even damage, affects UF membrane efficiency.Furthermore, it is necessary to consume certain
Energy the required higher pressure of UF membrane is provided, partial pressure wastes with the discharge of exhaust gas.Due to the gas of separation
It measures huge, causes energy dissipation huge.
Utility model content
The main purpose of the utility model is to provide a kind of trapping retracting devices of carbon dioxide in flue gas, existing to solve
Have in technology using the CO in membrane separation process trapping recycling coal-fired plant flue gas2When existing enrichment degree is low, complex process, film
The problem of separative efficiency is poor and energy dissipation.
To achieve the goals above, one side according to the present utility model provides a kind of carbon dioxide in flue gas
Trap retracting device comprising：Smoke processing system, smoke processing system is provided with processing import and processing exports, at flue gas
Reason system is for handling flue gas, to remove the liquid impurity and solid impurity in flue gas；First film separation unit, first
Film separation unit is provided with the first air inlet, the first carbon dioxide enriched gas outlet and the first high pressure non-permeate gas and exports, and first
Air inlet is connected with processing outlet；Second film separation unit, the second film separation unit are provided with the second air inlet, carbon dioxide production
Product gas exports and the outlet of the second high pressure non-permeate gas, and the second air inlet is connected with the first carbon dioxide enriched gas outlet；And it is high
Pressure energy retracting device, high pressure energy retracting device are connected with the outlet of the first high pressure non-permeate gas, and high pressure energy retracting device is for recycling
First high pressure non-permeate gas exports the pressure energy of the high pressure gas of output.
Further, device further includes：Third film separation unit, third film separation unit are provided with third air inlet,
Three carbon dioxide enriched gas outlets and offgas outlet, third air inlet are connected with the outlet of the second high pressure non-permeate gas；Gas mixing
Device, gas mixer is arranged on the pipeline that the first carbon dioxide enriched gas outlet is connected to the second air inlet, and gas mixing
Device, which is additionally provided with, returns return air inlet, returns return air inlet and is connected with the carbon dioxide enriched gas outlet of third.
Further, the membrane module difference in the first film separation unit, the second film separation unit and third film separation unit
Independently selected from hollow-fibre membrane, rolled film or plate membrane.
Further, device further includes：First compressor, the first compressor are connected with processing import；Second compressor, the
Two compressors are arranged on the pipeline that gas mixer is connected to the second air inlet.
Further, smoke processing system includes filter, and the import of filter is processing import, and the outlet of filter is
Processing outlet.
Further, smoke processing system further includes：The import of cooler, cooler is processing import, and cooler goes out
Mouth is connected with the import of filter.
Further, smoke processing system further includes demister, and the import of demister is connected with the outlet of cooler, demisting
The outlet of device is connected with the import of filter.
Further, device further includes dehydration device, and gas inlet and dehydration exhanst gas outlet are provided in dehydration device, is taken off
Water exhanst gas outlet is connected with the import of the first compressor.
Further, high pressure energy retracting device includes expansion work device, expansion work device and the first high pressure non-permeate
Gas outlet is connected.
Further, high pressure energy retracting device further includes generator, and generator is connected with expansion work device.
Further, generator is additionally provided with low temperature gas floss hole；High pressure energy retracting device further includes cold energy reclamation device,
Cold energy reclamation device is connected with low temperature gas floss hole, to recycle the cold for the low temperature gas that low temperature gas floss hole discharges.
Using the technical solution of the utility model, a kind of trapping retracting device of carbon dioxide in flue gas is provided, is wrapped
Include smoke processing system, the first film separation unit, the second film separation unit and high pressure energy retracting device；Smoke processing system
It is provided with processing import and processing exports, smoke processing system is miscellaneous to remove the liquid in flue gas for handling flue gas
Matter and solid impurity；First film separation unit is provided with the first air inlet, the first carbon dioxide enriched gas outlet and the first high pressure
Impermeable gas exports, and the first air inlet is connected with processing outlet；Second film separation unit is provided with the second air inlet, carbon dioxide
Product gas outlet and the outlet of the second high pressure non-permeate gas, the second air inlet are connected with the first carbon dioxide enriched gas outlet；High pressure
Energy retracting device is connected with the outlet of the first high pressure non-permeate gas, and high pressure energy retracting device goes out for recycling the first high pressure non-permeate gas
The pressure energy of the high pressure gas of mouth output.
Using above-mentioned apparatus, before carrying out membrane separation to coal-burning power plant's combustion product gases, first with fume treatment system
System can remove liquid impurity (such as moisture and some fluid organic materials) and solid impurity in flue gas, with prevent liquid impurity and
The presence of solid impurity influences the efficiency of UF membrane.After the treatment, flue gas enters the first film separation unit and the second UF membrane
Unit, using successively membrane separating process is enriched with the carbon dioxide in flue gas twice.The above reason can significantly improve two
The enrichment degree of carbonoxide.Meanwhile the utility model also uses the first high pressure non-permeate gas of high pressure energy retracting device recycling and goes out
The pressure energy of the high pressure gas of mouth output, can further decrease the energy consumption of technique, make processing while carbon dioxide-enriched
Process is more green.In addition to this, the carbon dioxide in recovered flue gas is trapped using the device of the utility model, it is of low cost,
It is simple for process, without any chemical process, it is not only suitable for the separation of carbon dioxide in coal-fired plant flue gas, is also applied for steel
The separation and collection of carbon dioxide in the low-concentration flue gas such as factory, cement plant.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide a further understanding of the present invention, this practicality
Novel illustrative embodiments and their description are not constituted improper limits to the present invention for explaining the utility model.
In the accompanying drawings：
Fig. 1 is shown to be illustrated according to a kind of trapping retracting device of carbon dioxide in flue gas of embodiment of the utility model
Figure；
Fig. 2 shows according to flue gas in a kind of trapping retracting device of the carbon dioxide in flue gas of embodiment of the utility model
The schematic diagram of processing system；And
Fig. 3 shows the trapping retracting device mesohigh according to a kind of carbon dioxide in flue gas of embodiment of the utility model
The schematic diagram of energy retracting device.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, smoke processing system；11, cooler；12, demister；13, filter；14, heat exchanger；20, the first UF membrane
Unit；30, the second film separation unit；40, high pressure energy retracting device；41, generator；42, cold energy reclamation device；50, tertiary membrane
Separative element；60, gas mixer；70, the first compressor；80, the second compressor.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
The application is described in further detail below in conjunction with specific embodiment, these embodiments should not be understood as limitation originally
Apply for range claimed.
As described in background technology part, use in the prior art in membrane separation process trapping recycling coal-fired plant flue gas
CO2When there are enrichment degrees low, complex process, the inefficient problem of UF membrane.
In order to solve this problem, the utility model provides a kind of trapping of carbon dioxide in coal-burning power plant's combustion product gases
Retracting device, as topic 1 shown in comprising smoke processing system 10, the first film separation unit 20, the second film separation unit 30 and
High pressure energy retracting device 40, smoke processing system 10 be provided with processing import and processing export, smoke processing system 10 for pair
Flue gas is handled, to remove the liquid impurity and solid impurity in flue gas；First film separation unit 20 is provided with the first air inlet
Mouth, the first carbon dioxide enriched gas outlet and the outlet of the first high pressure non-permeate gas, the first air inlet are connected with processing outlet；Second
Film separation unit 30 be provided with the second air inlet, carbon dioxide product gas outlet and the second high pressure non-permeate gas outlet, second into
Gas port is connected with the first carbon dioxide enriched gas outlet；High pressure energy retracting device 40 is connected with the outlet of the first high pressure non-permeate gas,
High pressure energy retracting device 40 is used to recycle the pressure energy of the high pressure gas of the first high pressure non-permeate gas outlet output.
It is first sharp before carrying out membrane separation to coal-burning power plant's combustion product gases using the above-mentioned apparatus of the utility model
Liquid impurity (such as moisture and some fluid organic materials) and solid impurity in flue gas can be removed with smoke processing system 10, with
Prevent the presence of liquid impurity and solid impurity from influencing the efficiency of UF membrane.After fume treatment, flue gas divides into the first film
From unit 20 and the second film separation unit 30, using successively membrane separating process is enriched with the carbon dioxide in flue gas twice.
The above reason can significantly improve the enrichment degree of carbon dioxide.Meanwhile the utility model also uses high pressure energy retracting device
The pressure energy of the high pressure gas of 40 the first high pressure non-permeate gas of recycling outlet outputs, can make place while carbon dioxide-enriched
Reason process is more green, reduces process energy consumption.In addition to this, the dioxy in recovered flue gas is trapped using the device of the utility model
Change carbon, it is of low cost, it is simple for process, without any chemical process, it is not only suitable for the separation of carbon dioxide in coal-fired plant flue gas,
It is also applied for the separation and collection of low concentration and the carbon dioxide rich in particulate matter in the flue gases such as steel plant, cement plant.
In specific operating process, flue gas enters fume treatment (through dedusting, desulphurization denitration treated combustion product gases)
After system 10 removes liquid impurity and solid impurity, enter the first film separation unit 20 from the first air inlet, through first time film point
From the infiltration gas for obtaining the on high-tension side impermeable gas of first segment and low-pressure side after processing.The on high-tension side impermeable gas of first segment contains
CO2Concentration is relatively low, from the first high pressure non-permeate gas export out after through 40 pressure recovery energy of high pressure energy retracting device.First segment is low
The infiltration gas of side is pressed to be rich in CO2, enter the second air inlet after the first carbon dioxide enriched gas outlet discharge, utilize the second film point
Second of membrane separation is carried out from unit 30, obtains second segment impermeable gas and infiltration gas.Wherein CO in second segment infiltration gas2
Purity it is higher, can be directly as CO2Product gas, which is sent outside, to be collected.
Partial CO 2 is carried in above-mentioned second segment impermeable gas, in order to further recycle this partial CO 2,
In a kind of preferred embodiment, as shown in Figure 1, above-mentioned apparatus further includes third film separation unit 50 and gas mixer 60,
Third film separation unit 50 is provided with the carbon dioxide enriched gas outlet of third air inlet, third and offgas outlet, third air inlet
It is connected with the outlet of the second high pressure non-permeate gas；The setting of gas mixer 60 is in the first carbon dioxide enriched gas outlet and the second air inlet
On the pipeline of mouth connection, and gas mixer 60 is additionally provided with and returns return air inlet, and it is carbon dioxide enriched with third to return return air inlet
Gas outlet is connected.Can second segment impermeable gas be subjected to further membrane separation in this way, by carbon dioxide therein into one
After step enrichment, it is back in gas mixer 60, it is then latter with the gas mixing of the first carbon dioxide enriched gas outlet discharge
It rises and is handled into the second film separation unit 30.Such multistage UF membrane is combined with the technique of separator pumparound,
The enrichment degree of carbon dioxide in flue gas can be further increased, the rate of recovery is improved, increases amount of collected.
In a kind of preferred embodiment, above-mentioned first film separation unit 20, the second film separation unit 30 and tertiary membrane point
It is separately selected from hollow-fibre membrane, rolled film or plate membrane from the membrane module in unit 50." separately selecting here
From " refer to that the membrane module in the first film separation unit 20, the second film separation unit 30 and third film separation unit 50 is each free
One kind from above-mentioned three kinds of membrane modules, three may be the same or different between each other.Preferably, the material of membrane module
It is high molecular polymer organic material.Compared to inoranic membrane as membrane module, formed using high molecular polymer organic material
Its processing technology of membrane module is simple, and manufacturing cost is relatively low, for separating and recovering the CO in coal-fired plant flue gas on a large scale2It being capable of pole
The earth reduces project investment cost.Meanwhile coal-fired plant flue gas concentration is very low (about 12%), the selectivity of organic film is more
Height can further increase CO2Separation and recovery rate and amount of collected.Illustrate, the utility model by using flue gas at
Reason system 10 efficiently solve organic film be easy by the solid impurities such as particulate matter pollution, to humidity require and temperature requirement it is higher
The problem of, it can more effectively play own advantages.
In a kind of preferred embodiment, above-mentioned apparatus further includes the first compressor 70 and the second compressor 80, the first pressure
Contracting machine 70 is connected with processing import；Second compressor 80 is arranged on the pipeline that gas mixer 60 is connected to the second air inlet.
Can be the CO of the first film separation unit 20 using the first compressor 702Infiltration further provides for pressure-driven；Similarly, is utilized
Two compressors 80 can be the CO of the second film separation unit 302Infiltration further provides for pressure-driven.And it should be noted that phase
Than in per-meate side, using the method for vacuumizing or purging decompression, the utility model utilizes the first compressor 70 and the second compressor
80 are capable of providing enough pressure differences, to drive enough CO2Through film, especially organic film, to further increase CO2
The trapping rate of recovery.
The effect of smoke processing system 10 is the liquid impurity and solid impurity removed in flue gas, it is avoided to influence organic film
Separative efficiency.In a preferred embodiment, as shown in Fig. 2, smoke processing system 10 includes filter 13, filter 13
Import be processing import, and the outlet of filter 13 be processing export.It can be removed in flue gas by filtration treatment in this way
Liquid impurity and solid impurity.
It is highly preferred that as shown in Fig. 2, smoke processing system 10 further includes：The import of cooler 11, cooler 11 is processing
The outlet of import, cooler 11 is connected with the import of filter 13.Flue gas by 11 cooling of cooler can by flue gas, into
Entering filter 13 can further be condensed with liquid, then be removed through filter 13, so as to further remove impurity.
It is further preferred that smoke processing system 10 includes the cooler 11 for being sequentially connected with setting, demister 12 and filtering
The import of device 13, cooler 11 is processing import, and the outlet of filter 13 is that processing exports.It is cold that flue gas enters cooler 11
It, can be by condensable liquid foam, droplet and the solids removal that may be entrained in flue gas into demister 12 after jelly.Then
The objectionable impurities such as the fine liquid that may be carried secretly in unstripped gas can be further removed into filter 13.In short, utilizing the cigarette
Gas processing system 10 can substantially more remove the impurity such as liquid impurity, the solid particle in flue gas, to further increase
The trapping effect of carbon dioxide.Meanwhile setting cooler 11 can also effectively control flue-gas temperature, to further increase organic film
Operation stability.
Preferably, above-mentioned filter 13 is condensation type filter.It can further remove raw material using condensation process in this way
The objectionable impurities such as the fine liquid that may be carried secretly in gas, while can also be by filtered fume collection in case subsequent processing.
In a kind of preferred embodiment, smoke processing system 10 further includes heat exchanger 14, and heat exchanger 14 is provided with to be added
Hot import and outlet to be heated, import to be heated are connected with the outlet of filter 13, and outlet to be heated is processing outlet.In this way
It can will remove the flue gas after impurity to carry out heat exchange in heat exchanger 14 and heated, make it away from dew point simultaneously constant system
Operation temperature.
In a kind of preferred embodiment, above-mentioned apparatus further includes the first compressor 70 and the second compressor 80, the first pressure
Contracting machine 70 is connected with processing import, and the second compressor 80 is arranged on the pipeline that gas mixer 60 is connected to the second air inlet；
First compressor 70 is additionally provided with exhaust branch and air inlet branch road, and heat exchanger 14 is additionally provided with thermal medium inlet and thermal medium goes out
Mouthful, thermal medium inlet is connected with exhaust branch, and thermal medium outlet is connected with air inlet branch road.In this way, through compressed cigarette for the first time
Qi leel is handled into cooler 11 at two-way, enters heat exchanger 14 as heating medium all the way all the way, with completion removal of impurities
Flue gas exchanges heat.After the completion of heat exchange, handled as cooler 11 is returned to after the high pressure flue gas cool-down of heating medium.
This can further utilize the heat of flue gas itself, reduce process energy consumption, keep trapping process more environmentally protective.Specifically, cold
But the type of cooling of machine 11 is water cooling, and the cold of cold energy reclamation device can also be utilized to cool down.
In order to further remove the liquid impurity carried in flue gas, in a kind of preferred embodiment, above-mentioned apparatus is also wrapped
Dehydration device is included, gas inlet and dehydration exhanst gas outlet are provided in dehydration device, is dehydrated exhanst gas outlet and the first compressor 70
Import be connected.It can be first carried out dehydrating before flue gas enters smoke processing system 10 in this way.
In a kind of preferred embodiment, high pressure energy retracting device 40 include expansion work device, expansion work device with
The outlet of first high pressure non-permeate gas is connected.It can convert high pressure energy to mechanical energy using the expansion work device.It is highly preferred that
(be not shown in figure expansion work device) as shown in Figure 3, high pressure energy retracting device 40 further includes generator 41, generator 41 with it is swollen
Swollen acting device is connected.Mechanical energy can be further converted to electric energy in this way.It is highly preferred that generator 41 is additionally provided with low temperature
Gas floss hole；High pressure energy retracting device 40 further includes cold energy reclamation device 42, cold energy reclamation device 42 and low temperature gas floss hole phase
Connect, to recycle the cold for the low temperature gas that low temperature gas floss hole discharges.Low temperature gas can be recycled using cold energy reclamation device 42 to arrange
Put the cold of the low temperature gas of mouth discharge.It is preferred that cold energy reclamation device 42 is cold recovery exchanger, more preferable cold recovery exchange
Device is used to cool down the water outlet of cooler 11.Preferably, when above-mentioned apparatus does not include third film separation unit 50, above-mentioned high pressure energy
Retracting device 40 is also connected with the outlet of the second high pressure non-permeate gas, to recycle the high pressure that the second high pressure non-permeate gas exports output
The pressure energy of gas.
Another aspect according to the present utility model additionally provides a kind of trapping recovery method of carbon dioxide in flue gas,
Including：Flue gas is handled, to remove the liquid impurity and solid impurity in flue gas, obtains processing flue gas；Flue gas will be handled
First time membrane separation is carried out, the first carbon dioxide enriched gas and the first high pressure non-permeate gas are obtained；By the first carbon dioxide
Enriched gas carries out second of membrane separation, obtains carbon dioxide product gas and the second high pressure non-permeate gas；And it is high to first
The pressure energy of pressure impermeable gas is recycled.
It is first sharp before carrying out membrane separation to coal-burning power plant's combustion product gases using the above method of the utility model
Liquid impurity (such as moisture and some fluid organic materials) and solid impurity in flue gas can be removed with smoke processing system 10, with
Prevent the presence of liquid impurity and solid impurity from influencing the efficiency of UF membrane.After fume treatment, using successively film divides twice
The carbon dioxide in flue gas is enriched with from process.The above reason can significantly improve the enrichment degree of carbon dioxide.Meanwhile
The utility model has also recycled the pressure energy of the high pressure gas of the first high pressure non-permeate gas outlet output, can be in enrichment titanium dioxide
Make processing procedure more green while carbon, reduces process energy consumption.In addition to this, it is trapped and is recycled using the method for the utility model
Carbon dioxide in flue gas, it is of low cost, it is simple for process, without any chemical process, it is not only suitable for two in coal-fired plant flue gas
The separation of carbonoxide is also applied for the separation of low concentration and the carbon dioxide rich in particulate matter in the flue gases such as steel plant, cement plant
Trapping.
In a preferred embodiment, after the step of obtaining the second high pressure non-permeate gas, method further includes following
Step：Third time membrane separation is carried out to the second high pressure non-permeate gas, obtains the carbon dioxide enriched gas of third and tail gas；And
The carbon dioxide enriched gas of third is returned and is mixed with the first carbon dioxide enriched gas, to carry out second of membrane separation.This
Second high pressure non-permeate gas can be carried out further membrane separation by sample, after carbon dioxide therein further enrichment, be returned
It returns and enters second of membrane separation together with after the gas mixing of the first carbon dioxide enriched gas outlet discharge.Such multistage
UF membrane is combined with the technique of separator pumparound, can be further increased the enrichment degree of carbon dioxide in flue gas, be carried
High-recovery increases amount of collected.
In a preferred embodiment, first time membrane separation, second of membrane separation and third time film point
The membrane module used in the step of from processing is separately selected from hollow-fibre membrane, rolled film or plate membrane.It is highly preferred that film
The material of component is high molecular polymer organic material.It is organic using high molecular polymer compared to inoranic membrane as membrane module
Its processing technology of the membrane module of material formation is simple, and manufacturing cost is relatively low, for separating and recovering in coal-fired plant flue gas on a large scale
CO2Project investment cost can be greatly reduced.Meanwhile coal-fired plant flue gas concentration is very low (about 12%), organic film
Selective higher, CO can be further increased2Separation and recovery rate and amount of collected.It illustrates, the utility model passes through
Organic film is efficiently solved using smoke processing system 10 to be easy by the pollution of the solid impurities such as particulate matter, to humidity requirement and temperature
More demanding problem is spent, own advantages can be more effectively played.
In a preferred embodiment, the step of flue gas being handled to remove liquid impurity and solid impurity it
Before, method further includes the steps that carrying out first compression to flue gas；It is preferred that in the step of first compression, gas pressure is made to be more than
0.3MPa.Preferably, the first carbon dioxide enriched gas and the carbon dioxide enriched gas of optional third are subjected to second of UF membrane
Before the step of processing, method further includes that the first carbon dioxide enriched gas and the carbon dioxide enriched gas of optional third are carried out two
The step of second compression；Preferably, in the step of second-compressed, gas pressure is made to be more than 0.3MPa.
Can be the CO of first time UF membrane using first compression2Infiltration further provides for pressure-driven；Similarly, two are utilized
Second compression can be the CO of second of UF membrane2Infiltration further provides for pressure-driven.And it should be noted that compared to oozing
Using the method for vacuumizing or purging decompression, the utility model is capable of providing enough pressure differences in the way of compression for saturating side,
To drive enough CO2Through film, especially organic film, to further increase CO2The trapping rate of recovery.
In a preferred embodiment, flue gas is handled to be wrapped the step of removing liquid impurity and solid impurity
It includes：Flue gas is filtered, the flue gas is obtained.It in this way can be by liquid impurity and solid impurity filtering removal.It is highly preferred that
Before the step of being filtered to flue gas, flue gas is handled also to be wrapped the step of removing liquid impurity and solid impurity
It includes：Flue gas is cooled down, liquid impurity is made to condense, obtains cooled flue gas；Cooled flue gas is filtered, processing cigarette is obtained
Gas.It can utilize cooling procedure that the liquid condensation carried secretly in flue gas is out further filtered removal in this way.
It is further preferred that before the step of being filtered to cooled flue gas, flue gas is handled miscellaneous to remove liquid
The step of matter and solid impurity further includes：Cooled flue gas is subjected to demisting, obtains demisting flue gas；And demisting flue gas was carried out
Filter obtains processing flue gas.It, can be by condensable liquid foam, droplet and possible quilt in flue gas by demisting after flue gas is first cooled
Entrained solid particle removes.Then the fine liquid etc. that may be carried secretly in unstripped gas can further be removed by filtration treatment
Objectionable impurities.In short, can substantially more remove liquid impurity, the solid particle in flue gas in the way of above-mentioned fume treatment
Equal impurity, to further increase the trapping effect of carbon dioxide.Meanwhile it can also effectively be controlled by carrying out cooling to flue gas
Flue-gas temperature, to further increase the operation stability of organic film.
In a preferred embodiment, before the step of flue gas being carried out first compression, method further includes to flue gas
The step of being carried out dehydrating.It can first be carried out dehydrating, be more advantageous to before flue gas enters the fume treatment stage in this way
Moisture impurity is removed, smoke moisture is controlled, accordingly further increases the UF membrane efficiency of organic film.
In a preferred embodiment, the step of being recycled to the pressure energy of the first high pressure non-permeate gas include：
Expansion work processing is carried out using the first high pressure non-permeate gas.High pressure energy can be converted to mechanical energy in this way.It is highly preferred that making
After the step of carrying out expansion work processing with the first high pressure non-permeate gas, the pressure energy of the first high pressure non-permeate gas is returned
The step of receipts further includes：The energy generated using expansion work is generated electricity.In this way, can electricity be further converted to mechanical energy
Energy.It is further preferred that low temperature gas is discharged in power generation process, the step of recycling to the pressure energy of the first high pressure non-permeate gas
Further include：Cold recovery is carried out to low temperature gas.This makes it possible to the pressure energies for more effectively recycling high pressure gas.
It is driving that the carbon dioxide separation trapping that flue gas is carried out using these types of membrane module, which is using pressure, and is had
Higher separating effect.
Embodiment 1
To certain coal-burning power plant, flue gas is tested, and accounts device shown in the utility model Fig. 1 to 3 for flue gas
Middle low concentration CO2The trapping of technique is recycled effect.The results are shown in Table 1 for mass balance：
The trapping retracting device of 1 carbon dioxide in flue gas of table handles CO in certain coal-burning power plant's flue gas2Mass balance table
As shown in Table 1, the flue-gas flow rate when certain power plant of processing after dust-removal and desulfurizing is 10000Nm3/ h, CO2Content is
When 12.37%, second segment film separation unit infiltration gas (product gas) flow that the membrane separation process in the present embodiment obtains is
699Nm3/ h, CO2Content is 97.11%.
High-pressure energy is recycled, table 2 gives to be recycled using the trapping of carbon dioxide in turbo-expander recovered flue gas
Device handles CO in certain coal-burning power plant's flue gas2High-pressure energy recycling calculate.
The trapping retracting device of 2 carbon dioxide in flue gas of table handles CO in certain coal-burning power plant's flue gas2High-pressure energy return
It receives and calculates
As shown in Table 2, the flue-gas flow rate when certain power plant of processing after dust-removal and desulfurizing is 10000Nm3/ h, CO2Content is
When 12.37%, total tolerance of the first high pressure and the second high pressure non-permeate gas that the membrane separation process in the present embodiment obtains is
8844Nm3/ h is calculated with year run time, 64.7310 can be generated using turbine generators for 4000 hours4The electricity of kWh, can
For the driving of compressor.
It can be seen from the above description that the above embodiments of the present invention achieve the following technical effects：
Retracting device is trapped using carbon dioxide in flue gas provided by the utility model, membrane separation is being carried out to flue gas
Before, liquid impurity and solid impurity in flue gas can be removed first with smoke processing system, to prevent liquid impurity and consolidate
The presence of body impurity influences the efficiency of UF membrane.After the treatment, flue gas enters the first film separation unit and the second UF membrane list
Member, using successively membrane separating process is enriched with the carbon dioxide in flue gas twice.The above reason can significantly improve dioxy
Change the enrichment degree of carbon.Hereafter expansion device power generation and cryogenic energy utilization are utilized, energy has fully been recycled.Moreover, utilizing this practicality
Carbon dioxide in novel device trapping recovered flue gas, it is simple for process, further without subsequent chemical absorbing or absorption etc.
Enrichment process, it is pollution-free, it is not only suitable for the separation of carbon dioxide in coal-fired plant flue gas, is also applied for steel plant, cement plant etc.
The separation and collection of carbon dioxide in low-concentration flue gas.
It is highly preferred that before carrying out membrane separation to flue gas, by supercharging, film made of organic material is overcome to permeate
It measures small disadvantage, moisture in flue gas and solid impurity can be removed first with smoke processing system and control temperature, overcome
The temperature tolerance of film made of organic material is poor, humidity requirement is high and is easy to be lacked by pollution of the solid impurities such as particulate matter etc.
Point.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (11)
1. a kind of trapping retracting device of carbon dioxide in flue gas, which is characterized in that including：
Smoke processing system (10), the smoke processing system (10) is provided with processing import and processing exports, at the flue gas
Reason system (10) is for handling flue gas, to remove the liquid impurity and solid impurity in the flue gas；
First film separation unit (20), it is rich that first film separation unit (20) is provided with the first air inlet, the first carbon dioxide
Gas collection exports and the outlet of the first high pressure non-permeate gas, and first air inlet is connected with processing outlet；
Second film separation unit (30), second film separation unit (30) are provided with the second air inlet, carbon dioxide product gas
Outlet and the outlet of the second high pressure non-permeate gas, second air inlet are connected with the described first carbon dioxide enriched gas outlet；With
And
High pressure energy retracting device (40), the high pressure energy retracting device (40) are connected with the first high pressure non-permeate gas outlet,
The high pressure energy retracting device (40) is used to recycle the pressure energy of the high pressure gas of the first high pressure non-permeate gas outlet output.
2. the apparatus according to claim 1, which is characterized in that described device further includes：
Third film separation unit (50), it is rich that the third film separation unit (50) is provided with third air inlet, third carbon dioxide
Gas collection exports and offgas outlet, and the third air inlet is connected with the second high pressure non-permeate gas outlet；
Gas mixer (60), the gas mixer (60) setting is in the described first carbon dioxide enriched gas outlet and described the
On the pipeline of two air inlets connection, and the gas mixer (60) is additionally provided with and returns return air inlet, it is described return return air inlet with
The carbon dioxide enriched gas outlet of third is connected.
3. the apparatus of claim 2, which is characterized in that first film separation unit (20), second film point
From the membrane module in unit (30) and the third film separation unit (50) separately be selected from hollow-fibre membrane, rolled film or
Plate membrane.
4. the apparatus of claim 2, which is characterized in that described device further includes：
First compressor (70), first compressor (70) are connected with the processing import；
Second compressor (80), second compressor (80) are arranged in the gas mixer (60) and second air inlet
On the pipeline of connection.
5. device according to any one of claim 1 to 4, which is characterized in that the smoke processing system (10) includes
The import of filter (13), the filter (13) is the processing import, and the outlet of the filter (13) is the place
Reason outlet.
6. device according to claim 5, which is characterized in that the smoke processing system (10) further includes：Cooler
(11), the import of the cooler (11) is the processing import, outlet and the filter (13) of the cooler (11)
Import be connected.
7. device according to claim 6, which is characterized in that the smoke processing system (10) further includes：Demister
(12), the import of the demister (12) is connected with the outlet of the cooler (11), the outlet of the demister (12) and institute
The import for stating filter (13) is connected.
8. device according to claim 4, which is characterized in that described device further includes：
Dehydration device is provided with gas inlet and dehydration exhanst gas outlet, the dehydration exhanst gas outlet and institute in the dehydration device
The import for stating the first compressor (70) is connected.
9. device according to any one of claim 1 to 4, which is characterized in that high pressure energy retracting device (40) packet
It includes：Expansion work device, the expansion work device are connected with the first high pressure non-permeate gas outlet.
10. device according to claim 9, which is characterized in that the high pressure energy retracting device (40) further includes：Generator
(41), the generator (41) is connected with the expansion work device.
11. device according to claim 10, which is characterized in that the generator (41) is additionally provided with the discharge of low temperature gas
Mouthful；The high pressure energy retracting device (40) further includes：Cold energy reclamation device (42), the cold energy reclamation device (42) with it is described low
Wet floss hole is connected, to recycle the cold for the low temperature gas that the low temperature gas floss hole discharges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721608062.6U CN207805334U (en) | 2017-11-27 | 2017-11-27 | The trapping retracting device of carbon dioxide in flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721608062.6U CN207805334U (en) | 2017-11-27 | 2017-11-27 | The trapping retracting device of carbon dioxide in flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207805334U true CN207805334U (en) | 2018-09-04 |
Family
ID=63334705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721608062.6U Active CN207805334U (en) | 2017-11-27 | 2017-11-27 | The trapping retracting device of carbon dioxide in flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207805334U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107899377A (en) * | 2017-11-27 | 2018-04-13 | 北京集封环能科技有限责任公司 | The trapping retracting device and method of carbon dioxide in flue gas |
| CN110787596A (en) * | 2019-10-04 | 2020-02-14 | 天津大学 | Low-temperature and membrane-coupled flue gas separation method |
| CN111422872A (en) * | 2019-01-10 | 2020-07-17 | 国家能源投资集团有限责任公司 | System and method for capturing carbon dioxide from a carbon dioxide generating asset group |
| CN115025595A (en) * | 2022-06-09 | 2022-09-09 | 浙江菲达环保科技股份有限公司 | CCUS all-in-one |
-
2017
- 2017-11-27 CN CN201721608062.6U patent/CN207805334U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107899377A (en) * | 2017-11-27 | 2018-04-13 | 北京集封环能科技有限责任公司 | The trapping retracting device and method of carbon dioxide in flue gas |
| CN111422872A (en) * | 2019-01-10 | 2020-07-17 | 国家能源投资集团有限责任公司 | System and method for capturing carbon dioxide from a carbon dioxide generating asset group |
| CN111422872B (en) * | 2019-01-10 | 2022-01-25 | 国家能源投资集团有限责任公司 | System and method for capturing carbon dioxide from a carbon dioxide generating asset group |
| CN110787596A (en) * | 2019-10-04 | 2020-02-14 | 天津大学 | Low-temperature and membrane-coupled flue gas separation method |
| CN115025595A (en) * | 2022-06-09 | 2022-09-09 | 浙江菲达环保科技股份有限公司 | CCUS all-in-one |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102026702B (en) | Gas-separation process using membranes with permeate sweep to remove co2 from combustion gases | |
| CN207805334U (en) | The trapping retracting device of carbon dioxide in flue gas | |
| CN103228339B (en) | Use the film having and permeating and blow and sweep from gas fuel combustion exhaust removing CO2Gas separating technology | |
| CN107899376A (en) | The joint of carbon dioxide in flue gas and nitrogen traps retracting device and method | |
| CN107899377A (en) | The trapping retracting device and method of carbon dioxide in flue gas | |
| EP2089138B1 (en) | Improved absorbent regeneration | |
| CN103249466A (en) | Process for separating carbon dioxide from flue gas using sweep-based membrane separation and absorption steps | |
| CN102133499A (en) | System and method for trapping acid gas in smoke | |
| CN207562639U (en) | Carbon dioxide in flue gas traps retracting device | |
| CN104428614A (en) | Process and apparatus for the separation of a stream containing carbon dioxide, water and at least one light impurity including a separation step at subambient temperature | |
| CN104587804A (en) | Device system for purifying by utilizing gas separation membrane | |
| EP2668994A1 (en) | Integrated CO2 phase changing absorbent for CO2 separation system | |
| CN115634561A (en) | Carbon dioxide capturing and washing device and method for thermal power plant | |
| CN207628185U (en) | The joint of carbon dioxide in flue gas and nitrogen traps retracting device | |
| CN110156016A (en) | The combined recovery device and method of carbon dioxide in flue gas, nitrogen and oxygen | |
| CN103359731A (en) | System and method for producing carbon dioxide | |
| CN210915955U (en) | Device for increasing combustion heat value of blast furnace gas | |
| CN110127700A (en) | The combined recovery device and method of carbon dioxide in flue gas, nitrogen and oxygen | |
| CN204447689U (en) | Gas separation membrane is used to carry out the apparatus system of purifying | |
| WO2023066134A1 (en) | System and method for preparing nitrogen from waste gas obtained by recovering co2 via chemical method | |
| CN217220919U (en) | CO 2 And N 2 Composite trapping and purifying system | |
| CN210134070U (en) | Device for removing carbonyl sulfide in blast furnace gas and improving combustion heat value of blast furnace gas | |
| CN107008125B (en) | CO in a kind of cement kiln flue gas2Capture method | |
| CN112588088B (en) | Device and method for inhibiting corrosion of membrane separation carbon dioxide capture process | |
| CN210134071U (en) | Device for increasing combustion heat value of blast furnace gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |