CN108298631A - A kind of continuous gas helps adsorption separating method and equipment - Google Patents
A kind of continuous gas helps adsorption separating method and equipment Download PDFInfo
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- CN108298631A CN108298631A CN201810140646.8A CN201810140646A CN108298631A CN 108298631 A CN108298631 A CN 108298631A CN 201810140646 A CN201810140646 A CN 201810140646A CN 108298631 A CN108298631 A CN 108298631A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
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- Water Treatment By Sorption (AREA)
Abstract
The present invention relates to a kind of continuous gas to help adsorption separating method and equipment.The continuous gas of the present invention helps adsorbing separation to be helped in adsorbing separation equipment in continuous gas and carries out, the equipment is by air-flotation column, it is set to its top and is capable of the adsorbent thin film of continuous rotation and the desorption tank with pulley and sink composition, clear liquid is pumped into air-flotation column first just to contact with adsorbent thin film to liquid level, open air valve, control gas continues through air-flotation column, then the solution containing organic matter to be separated or ionic species is continuously pumped into air-flotation column, rise bubble carrying organic matter or ionic species are communicated up, liquid level is reached to be captured by the adsorbent thin film of continuous rotation after nearby and take mother liquor out of, then, adsorbent thin film continues through desorption tank and sink completes desorption and washing, regenerative adsorption agent film is reused for adsorbing.The present invention can realize that whole process is continuous, adsorbent is easily recycled and is detached suitable for complicated solution system, and separative efficiency is high, good separating effect.
Description
Technical field
The present invention relates to a kind of adsorption separating method, more particularly to one kind can the continuous gas of whole process help adsorption separating method
And equipment.
Background technology
Adsorption separation technology generally includes the preparation of adsorbent, adsorbent for the absorption of solute, by adsorbent from separation
Then adsorbent recycles after desorption for removal in system.Since the technology has at low cost, process simply and separative efficiency
The advantages that high, has very in Separation of Natural Products, metal separation, the separation of various other substances and wastewater treatment process
It is widely applied.Although the technology has obtained prodigious progress in various separation processes, but still there are following some problems：
First, the difficult separation and recycling of adsorbent, currently used method is centrifugation, filtering or dress column, and there are energy consumptions for centrifugation or filtering
A series of problems, such as height, cumbersome there are handling steps and high to absorbent particles requirement of mechanical strength dress column, especially work as absorption
The removal process that agent grain size tends to this adsorbent after nanoscale becomes more difficult；Second is that cannot achieve entire absorption, washing
It is continuous with the whole process of desorption process；Third, adsorption separation process can not be suitable for the complicated solution system containing particle.
The bubble adsorption separation technology that recent decades grow up, it is the principle according to adsorption, using bubble as
Carrier makes particle, specific target molecules or ion in solution etc. adhere to or be adsorbed on the side that " solution-air " interface is detached with mother liquor
Method was once classified as one of ten big chemical industry new technologies, separation of the technology for molecule or ion in last century the eighties by the U.S.
Also known as solvent sublation, bubble realize preservation by capturing target molecule at a distance and the molecule is transported to upper solvent layer, most
It is detached eventually.
To solve the problems of adsorption separation technology, the present invention is by dissolved air flotation technology and adsorption separation technology coupling
It closes, development gas helps adsorbing separation new technology, i.e.,：Bubble by solution target molecule or ionic transport to liquid at the top of air-flotation column
Face, these molecules or ion are adsorbed and are continuously taken out of molten by top and liquid level close contact and the adsorbent thin film of continuous rotation
Liquid realizes continuous adsorption separation process, and then, adsorbent thin film continues through desorption liquid completion in desorption tank and was continuously desorbed
Journey, the adsorbent thin film through desorption continuously contacts with cleaning solution in sink and completes continuous washing process, most afterwards through regenerated suction
Attached agent film is reused for adsorption process, so recycles, and completes full-range continuous gas and helps adsorption separation process.This coupling skill
Art makes the recycling of adsorbent become very simple, while because adsorbent thin film and particles in solution are easily isolated so that the skill
Art is adaptable to complicated solution system, it is often more important that the whole process that absorption, washing and desorption process can be achieved is continuous.Gas helps
The research of adsorption separation technology and its equipment will be a brand-new research direction, for promote adsorption separation technology development and
The application field for widening bubble adsorption separation technology has good theory significance and wide application prospect.
Invention content
The object of the present invention is to provide a kind of whole process companies being directly separated being applicable to target substance in complex system
Continuous gas helps adsorption separating method and equipment, solve difficult adsorbent recycling present in adsorption separation process, absorption, washing and
Desorption process is difficult to whole process continuously and can not be suitable for the problems such as complex separations system containing particle.
The technical scheme is that：
A kind of continuous gas helps adsorption separating method, continuous gas that adsorbing separation is helped to help adsorbing separation equipment in continuous gas
Upper progress, the equipment by air-flotation column, be set to its top and be capable of the adsorbent thin film of continuous rotation and with the desorption of pulley
Slot and sink are constituted, and be pumped into clear liquid first in air-flotation column just contacts with adsorbent thin film to liquid level, opens air valve, controls gas
Body continues through air-flotation column, then will be continuously pumped into air-flotation column containing particle and organic matter to be separated or the solution of ionic species
In, rise bubble carrying organic matter or ionic species are communicated up, it is thin by the adsorbent of continuous rotation after nearby to reach liquid level
Film captures and takes out of mother liquor, and particle is then trapped in mother liquor；Then, adsorbent thin film continues through desorption liquid in desorption tank and completes
Continuous desorption process；Cleaning solution, which continuously contacts with, in adsorbent thin film and sink through desorption completes continuous washing process, finally
It is reused for adsorption process through regenerated adsorbent thin film, is so recycled, the bottom clear liquid of air-flotation column is from outlet through U-shaped regulation pipe
Clear liquid receiving slit is flowed into, the continuous gas of whole process is completed and helps adsorption separation process.
Further, further include that surfactant or extractant, surfactant or extractant energy are added into air-flotation column
Enough auxiliary bubble carries organic matter or ionic species in solution and is communicated up.
Further, the surfactant is selected from cationic, anionic or nonionic surface active agent, institute
The extractant described in extractant stated is selected from neutral, acid, alkalinity or chelating kind of extractants.
Further, the adsorbent thin film can prepare packet by the method for surface coating, surface modification or surface aggregate
It includes but is not limited in belt surface adhering powder adsorbent, surface modification thin layer has the functional group or surface aggregate of suction-operated
The functional group of upper tool suction-operated.
Further, the flow control for the gas being passed through is 0~1000mL/min, and does not include 0, the gas flow being passed through
Depending on the gas distribution area of the size of air-flotation column and gas distributor, the more big then gas flow of gas distribution area is bigger, is passed through
The preferably higher flow of gas flow；The gas is selected from inert gas (such as nitrogen, argon gas).
Further, the particle is selected from one or more of sludge, various powdery granule objects and microorganism；
The organic matter is selected from one or more of biomolecule, high polymer and organic molecule；The ionic species choosing
From metal ion or nonmetallic ion.
The principle of the above method is mainly reflected in continuous gas and helps in adsorbing separation equipment, and this method can be such that adsorbent is easy to
It recycles and can realize absorption, washing and the continuous operation of desorption process whole process and suitable for the complex separations system containing particle, have
Solves to effect the corresponding problem present in absorption method.
A kind of continuous gas for the above method helps adsorbing separation equipment, including air-flotation column, adsorbent thin film, desorption tank
And sink, the bottom of air-flotation column are equipped with gas distributor, feed liquid port, the lower part setting of air-flotation column is arranged in the top of air-flotation column
Purified liquor outlet is provided with the pulley of fixed position and the adsorbent thin film by its drive at the top of air-flotation column；Adsorbent thin film by
Motor driving wheel makes it recycle continuous rotation between air-flotation column, desorption tank and sink through pulley Continuous Drive, two in desorption tank
End is equipped with pulley and is continued through for adsorbent thin film, and desorption liquid is filled in desorption tank；Both ends are equipped with pulley on sink
It is continued through for adsorbent thin film, cleaning solution is filled in sink.
Further, the preferred variable speed electric motors, particularly of the motor of adsorbent thin film is driven, the motor selected from AC or DC input is adjusted
It is 0~100 rev/min to save rate, and is more than 0.
Further, it is respectively provided with blender in desorption tank and sink, to improve desorption and detersive efficiency.
Further, the gas distributor is selected from the sand core funnel of different model or the micropore of suitable air supporting post shapes
Gas distributing pipeline, such as sand core funnel of model G1, G2, G3, G4 and G5 series commonly used in the art；Or various sizes micropore diameter pipe
Gas pipe made of road can preferably generate the small-bore pipeline of micro-bubble.
Further, further include ancillary equipment gas delivery system, material liquid transport system and clear liquid output system, it is described
Gas delivery system is connected by pipeline with the air inlet of surge tank by gas cylinder, and the gas vent of surge tank passes through spinner
Meter is connected with the gas access of air supporting column bottom；The material liquid transport system is connected to through pipeline with peristaltic pump by material fluid bath,
Wriggling pump discharge is connected with the feed liquid port of air-flotation column；The clear liquid output system is connected by air-flotation column lower part through U-shaped regulation pipe
The clear liquid receiving slit of logical air-flotation column purified liquor outlet is constituted.
It, can be with to strengthen the separative efficiency that continuous gas helps adsorption separation technology for substance to be separated in complicated solution system
It is carried out by adjusting the external process parameter of respective process, such as：Gas flow rate, ionic strength, pH value, desorption conditions, washing
Condition and addition auxiliary agent etc..
The beneficial effects of the present invention are：
The present invention couples dissolved air flotation technology that is simple, being easy to amplification with adsorption separation technology, and development whole process is continuous
Gas help adsorbing separation new technology, to realize complicated solution containing particle in target substance direct continuous separation process.The party
Method have many advantages, such as adsorbent be easily recycled, can whole process continuous operation and suitable for the complex separations system containing particle, very well
Ground solves the corresponding problem present in simple adsorption separation process, the Selective Separation and waste water of object in complicated solution
It is had broad application prospects in process field.
Description of the drawings
Fig. 1 is that the continuous gas of whole process of the present invention helps the structural schematic diagram of adsorption separation device, wherein 1. gas cylinders, 2. subtract
Pressure valve, 3. surge tanks, 4. spinner flowmeters, 5. gas distributors, 6. air-flotation columns, 7. bubbles, 8. particles, 9. substances to be separated,
10. adsorbent thin film, 11. pulleys, 12. motor driving wheels, 13. desorption tanks, 14. sinks, 15. material fluid baths, 16.U types are adjusted
Pipe, 17. clear liquid receiving slits.
Specific implementation mode
It elaborates with reference to the accompanying drawings and detailed description to the present invention.Those skilled in the art it will be clearly understood that
Described examples are only for helping to understand the present invention, should not be regarded as a specific limitation of the invention.
Embodiment 1
More typical pollutant is Congo red as separation object using in dyeing waste water.Using continuous gas shown in FIG. 1
Adsorption separation device is helped, the device mainly includes air-flotation column 6 (internal diameter 60mm, long 350mm), adsorbents with gas distributor 5
The top of film 10, desorption tank 13 and sink 14, air-flotation column 6 is provided with the pulley 11 of fixed position and the absorption by its drive
Agent film 10；Adsorbent thin film 10, through 11 Continuous Drive of pulley, makes it in air-flotation column 6,13 and of desorption tank by motor driving wheel 12
Continuous rotation is recycled between sink 14, the whole process to realize absorption, washing and desorption process is continuous.
Further include ancillary equipment gas delivery system, material liquid transport system and clear liquid output system.Gas delivery system
It is connected with the air inlet of surge tank 3 by pipeline, pressure reducing valve 2 by gas cylinder 1, the gas vent of surge tank 3 passes through spinner
Meter 4 is connected with the gas access of 6 bottom of air-flotation column, and gas is conveyed into air-flotation column 6 using gas distributor 5；Material liquid
Transport system is connected to through pipeline with peristaltic pump by material fluid bath 15, and wriggling pump discharge is connected with the feed liquid port of air-flotation column 6 and leads to gas
Transferring raw material liquid in floating column 5；Clear liquid output system is connected to air-flotation column purified liquor outlet by 6 lower part of air-flotation column through U-shaped regulation pipe 16
Clear liquid receiving slit 17 is constituted.
Adsorption separation device is helped to detach Congo red process in waste water using above-mentioned continuous gas as follows：
The material liquid that ionic strength is the Congo red a concentration of 30ppm of 1mol/L is prepared, a small amount of pond is added in material liquid
In sludge, spare as material liquid to be separated, the dacron cloth of 2m long 5cm wide is as adsorbent thin film.
Concrete operations are：Under the conditions of continuous operation, be pumped into first in air-flotation column 6 without Congo red clear liquid to liquid level with
Adsorbent thin film 10 just contacts, and opens air valve, and adjusting gas flow, drives adsorbent thin film 10 to rotate at wriggling pump discharge
12 rotating speed of motor driving wheel is setting value, and the solution containing sludge 8 and Congo red 9 fully to suspend is continuously pumped into gas through peristaltic pump
In floating column 6, while U-shaped regulation pipe 16 is quickly adjusted, so that the liquid level in air-flotation column 6 is had with adsorbent thin film 10 and suitably contact and tie up
It holds constant.Rise bubble continuously to it is Congo red captured and be enriched to liquid level form substance solution enrichment region to be separated, passing through
Congo red continuously to be exported under the suction-operated of the adsorbent thin film 10 of 12 continuous rotation of motor driving wheel, mud granule is cut
Stay in mother liquor, then, adsorbent thin film 10 continue through desorption liquid in desorption tank 13 make it is Congo red from film be desorbed under
Come, completes desorption process；It is continuous washed that adsorbent thin film 10 through desorption with cleaning solution in sink 14 continuously contacts with completion
Journey is most reused for adsorption process through regenerated adsorbent thin film afterwards, so recycles, and the bottom clear liquid containing sludge is from outlet through U
Type regulation pipe 16 flows into clear liquid receiving slit 17, completes the continuous gas of whole process and helps adsorption separation process.
The experimental results showed that：When nitrogen flow rate is 70ml/min, when feed velocity is 10mL/min, Congo red is continuous
Removal rate reaches 95.6%, and mud granule is trapped in well in mother liquor to flow out in air-flotation column outlet at bottom clear liquid, outflow
Rate is higher than 98%.
Embodiment 2
It is separation object with the heavy metal ion in waste water.This experiment is with more typical toxic heavy metal ion Cr VI
As removal object, use the film of the 2m long 5cm wide of surface coating film activated carbon as adsorbent thin film, Cr6+It is a concentration of
30ppm takes a small amount of CTAB as surfactant.
Concrete operations are：Under the conditions of continuous operation, it is pumped into no Cr first in air-flotation column 66+Ion clear liquid to liquid level with
Adsorbent thin film 10 just contacts, and opens air valve, and adjusting gas flow, drives adsorbent thin film 10 to rotate at wriggling pump discharge
12 rotating speed of motor driving wheel is setting value, the Cr containing sludge 8 and a small amount of CTAB of addition that will fully suspend through peristaltic pump6+Ion 9
Solution be continuously pumped into air-flotation column 6, while quickly adjusting U-shaped regulation pipe 16, make the liquid level in air-flotation column 6 and adsorbent thin film
10 have and suitably contact and remain constant.Rise bubble continuously to CTAB and Cr6+The compound of ion is captured and is enriched to liquid
Face forms substance solution enrichment region to be separated, in the suction-operated of the adsorbent thin film 10 through 12 continuous rotation of motor driving wheel
Under, compound is continuously exported, and mud granule is trapped in mother liquor, and then, adsorbent thin film 10 continues through desorption tank 13
Middle desorption liquid makes Cr6+Ion is desorbed from film, completes desorption process；Adsorbent thin film 10 through desorption and sink
Cleaning solution, which continuously contacts with, in 14 completes continuous washing process, is most reused for adsorption process through regenerated adsorbent thin film afterwards, such as
This cycle, the bottom clear liquid containing sludge flow into clear liquid receiving slit 17 through U-shaped regulation pipe 16 from outlet, complete the continuous gas of whole process
Help adsorption separation process.
The experimental results showed that：When nitrogen flow rate is 80mL/min, when feed velocity is 5mL/min, Cr6+Ion it is continuous
Removal rate reaches 93.8%, and mud granule is trapped in well in mother liquor to flow out in air-flotation column outlet at bottom clear liquid, outflow
Rate is higher than 98%.
Applicant states, the preferred embodiment of the present invention has been described in detail above, but is not meant to that the present invention must
Above-mentioned detailed process equipment and technological process, which must be relied on, to be implemented.Person of ordinary skill in the field is it will be clearly understood that this
Any improvement of invention, the addition of equivalence replacement and auxiliary element to each raw material of product of the present invention, the selection etc. of concrete mode,
It is within the scope of the present invention.
Claims (10)
1. a kind of continuous gas helps adsorption separating method, which is characterized in that continuous gas helps adsorbing separation to help suction in continuous gas
It is carried out on attached separation equipment, the equipment is by air-flotation column, the adsorbent thin film and band that are set to its top and are capable of continuous rotation
The desorption tank and sink of pulley are constituted, and be pumped into clear liquid first in air-flotation column just contacts with adsorbent thin film to liquid level, opens
Air valve, control gas continue through air-flotation column, then will be continuous containing particle and organic matter to be separated or the solution of ionic species
It is pumped into air-flotation column, rises bubble carrying organic matter or ionic species are communicated up, by continuous rotation after reaching liquid level nearby
Adsorbent thin film capture and take out of mother liquor, particle is then trapped in mother liquor；Then, adsorbent thin film continues through in desorption tank
Desorption liquid completes continuous desorption process；Cleaning solution continuously contacts with the continuous washing of completion in adsorbent thin film and sink through desorption
Process is most reused for adsorption process through regenerated adsorbent thin film afterwards, so recycles, and the bottom clear liquid of air-flotation column is passed through from outlet
U-shaped regulation pipe flows into clear liquid receiving slit, completes the continuous gas of whole process and helps adsorption separation process.
2. continuous gas according to claim 1 helps adsorption separating method, which is characterized in that further include adding into air-flotation column
Enter surfactant or extractant, surfactant or extractant can assist bubble to carry organic matter or ionic object in solution
Matter is communicated up.
3. continuous gas according to claim 2 helps adsorption separating method, which is characterized in that the surfactant choosing
From cationic, anionic or nonionic surface active agent, the extractant is selected from neutral, acid, alkalinity or chelating
Kind of extractants.
4. continuous gas according to claim 1 or 2 helps adsorption separating method, which is characterized in that the adsorbent thin film
It is prepared by the method for surface coating, surface modification or surface aggregate, is including but not limited to adsorbed in belt surface adhering powder
Agent, surface modification thin layer have the functional group for having suction-operated on the functional group or surface aggregate of suction-operated.
5. continuous gas according to claim 1 or 2 helps adsorption separating method, which is characterized in that the stream for the gas being passed through
Amount control is 0~1000mL/min, and does not include 0, and the gas flow being passed through is according to the size of air-flotation column and gas distributor
Depending on gas distribution area, the more big then gas flow of gas distribution area is bigger；The gas is selected from inert gas.
6. continuous gas according to claim 1 or 2 helps adsorption separating method, which is characterized in that the particle is selected from dirt
One or more of mud, various powdery granule objects and microorganism；The organic matter be selected from biomolecule, high polymer and
One or more of organic molecule；The ionic species are selected from metal ion or nonmetallic ion.
7. one kind helping adsorbing separation equipment for the continuous gas of claim 1 to 6 any one of them method, which is characterized in that
Including air-flotation column, adsorbent thin film, desorption tank and sink, the bottom of air-flotation column is equipped with gas distributor, the top of air-flotation column
Feed liquid port is set, and the lower part of air-flotation column is arranged purified liquor outlet, is provided with the pulley of fixed position at the top of air-flotation column and by it
The adsorbent thin film of drive；Adsorbent thin film, through pulley Continuous Drive, is made it in air-flotation column, desorption tank and washed by motor driving wheel
It washs and recycles continuous rotation between slot, both ends are equipped with pulley and are continued through for adsorbent thin film in desorption tank, are filled in desorption tank
Desorption liquid；Both ends are equipped with pulley and are continued through for adsorbent thin film on sink, and cleaning solution is filled in sink.
8. continuous gas according to claim 7 helps adsorbing separation equipment, which is characterized in that drive the electricity of adsorbent thin film
Machine is variable speed electric motors, particularly, the motor selected from AC or DC input, and regulations speed is 0~100 rev/min, and is more than 0.
9. continuous gas according to claim 7 helps adsorbing separation equipment, which is characterized in that in desorption tank and sink
Blender is set；The gas distributor is selected from the sand core funnel of different model or the micropore gas distribution pipe of suitable air supporting post shapes
Road.
10. continuous gas according to claim 7 helps adsorbing separation equipment, which is characterized in that further include ancillary equipment gas
Body conveying system, material liquid transport system and clear liquid output system, the gas delivery system pass through pipeline and buffering by gas cylinder
The air inlet of tank is connected, and the gas vent of surge tank is connected by spinner flowmeter with the gas access of air supporting column bottom；
The material liquid transport system is connected to through pipeline with peristaltic pump by material fluid bath, and wriggling pump discharge is connected with the feed liquid port of air-flotation column
It is logical；The clear liquid receiving slit that the clear liquid output system is connected to air-flotation column purified liquor outlet by air-flotation column lower part through U-shaped regulation pipe is constituted.
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| CN201810140646.8A CN108298631A (en) | 2018-02-10 | 2018-02-10 | A kind of continuous gas helps adsorption separating method and equipment |
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| CN201810140646.8A CN108298631A (en) | 2018-02-10 | 2018-02-10 | A kind of continuous gas helps adsorption separating method and equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109847402A (en) * | 2019-01-31 | 2019-06-07 | 湘潭大学 | A kind of belt type adsorption separation method and equipment |
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Application publication date: 20180720 |
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