CN114887460A - Hierarchical quantitative ultrafiltration method based on molecular-scale atmospheric brown carbon - Google Patents
Hierarchical quantitative ultrafiltration method based on molecular-scale atmospheric brown carbon Download PDFInfo
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- CN114887460A CN114887460A CN202210427411.3A CN202210427411A CN114887460A CN 114887460 A CN114887460 A CN 114887460A CN 202210427411 A CN202210427411 A CN 202210427411A CN 114887460 A CN114887460 A CN 114887460A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 51
- 238000000108 ultra-filtration Methods 0.000 title claims abstract description 36
- 230000005540 biological transmission Effects 0.000 claims abstract description 38
- 238000012546 transfer Methods 0.000 claims abstract description 33
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000003860 storage Methods 0.000 claims abstract description 13
- 239000012528 membrane Substances 0.000 claims description 49
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 18
- 238000001914 filtration Methods 0.000 claims description 18
- 238000005520 cutting process Methods 0.000 claims description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000011068 loading method Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
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- 239000000463 material Substances 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 12
- 239000002195 soluble material Substances 0.000 description 24
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- 230000007246 mechanism Effects 0.000 description 6
- 230000031700 light absorption Effects 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
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- 230000008859 change Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 1
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- 238000009833 condensation Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention discloses a grading quantitative ultrafiltration method based on molecular-weight atmospheric brown carbon, which comprises a transfer tank and a liquid storage tank, wherein a conveying pipe is arranged between the transfer tank and the liquid storage tank, a direct current motor is arranged at the top end of the transfer tank, the output end of the direct current motor is connected with a movable shaft, linking frames are symmetrically arranged at the top end of the transfer tank, mounting frames are arranged on opposite surfaces of the linking frames, a first centrifugal tank and a second centrifugal tank are connected between the mounting frames and the linking frames, a servo motor is arranged on the outer surface of one end of each mounting frame, and the output end of the servo motor is connected with a transmission shaft. According to the hierarchical quantitative ultrafiltration method based on the molecular-weight atmospheric brown carbon, a turbine is driven by airflow and materials to enable the turbine to be in a rotating state, the materials flow into a conveying channel inside a mixing paddle board and are discharged into a transmission shaft, and the materials are discharged into a transfer tank from the other end of the transmission shaft, so that the hierarchical quantitative effect is achieved.
Description
Technical Field
The invention relates to the technical field of brown carbon ultrafiltration, in particular to a hierarchical quantitative ultrafiltration method based on molecular-scale atmospheric brown carbon.
Background
Brown carbon is an important organic aerosol with light absorption characteristics, the light absorption intensity of the brown carbon exponentially increases along with the shortening of the wavelength, and particularly the light absorption capacity of the brown carbon sharply increases in an ultraviolet band with active photoreaction. Brown carbon can affect global radiation balance, change global radiation compendium; the light absorption material can also be used as a cloud condensation nucleus to change the light absorption property of a cloud layer, thereby influencing the climate; the brown carbon has complex composition and can generate negative influence on human health, and the brown carbon has complex sources, including primary emission such as coal combustion, biomass combustion and motor vehicle emission, and can also be generated through processes such as secondary conversion. Although brown carbon is one of the hot spots in the international atmospheric environment field, the optical properties, concentration and atmospheric environmental impact of brown carbon are still very poor.
However, when brown carbon is filtered, ultrafiltration equipment is needed, however, no special device for brown carbon ultrafiltration is available in the market, so that the ultrafiltration speed of brown carbon is low, great inconvenience is brought to detection tests, and research progress of the tests is seriously influenced.
Disclosure of Invention
The invention aims to provide a molecular-magnitude atmospheric brown carbon-based fractional quantitative ultrafiltration method, which aims to solve the problems that no special device for ultrafiltration of brown carbon is provided in the market in the background technology, so that the ultrafiltration speed of brown carbon is low, great inconvenience is brought to a detection test, and the research progress of the test is seriously influenced.
In order to achieve the purpose, the invention provides the following technical scheme: a graded quantitative ultrafiltration method based on molecular-weight atmospheric brown carbon comprises a transfer tank and a liquid storage tank, wherein a conveying pipe is arranged between the transfer tank and the liquid storage tank, a direct-current motor is arranged at the top end of the transfer tank, the output end of the direct-current motor is connected with a movable shaft, linking frames are symmetrically arranged at the top end of the transfer tank, mounting frames are arranged on opposite surfaces of the linking frames, a first centrifugal tank and a second centrifugal tank are connected between the mounting frames and the linking frames, a servo motor is arranged on the outer surface of one end of each mounting frame, the output end of the servo motor is connected with a transmission shaft, a filter screen and a third filter membrane are arranged inside the first centrifugal tank and the second centrifugal tank, a first filter membrane and a second filter membrane are arranged inside the transfer tank, and a comprehensive pipeline is connected inside the first centrifugal tank and the second centrifugal tank;
the hierarchical quantitative ultrafiltration method based on the molecular-weight atmospheric brown carbon comprises the following steps:
s1, conveying the collected gas with brown carbon into a centrifugal device, adding 15mL of pure water into the centrifugal device, centrifuging for 30min, filtering by using a corresponding pore-size filter membrane with the diameter of 0.22 mu m on the centrifugal device, and discharging into a corresponding transfer device;
s2, adding 30mL of 0.1M NaOH into the transfer equipment in the S1 to immerse the particle membrane subjected to ultrafiltration, then dropwise adding a proper amount of HCl, adjusting the pH value of the mixed solution to about 2, standing for 50min, filtering by using a 0.22-micron pore-size filtering membrane on a tank body, adding 10mL of methanol solution into other flow dividing channels not extracted to immerse the membrane, standing for 24h, taking out the membrane, and airing;
s3, respectively loading 15mL of water-soluble brown carbon and alkali-soluble brown carbon on the activated HLB column, collecting effluent liquid, adding 5mL of methanol to elute adsorbed components, and completing the ultrafiltration process of the water-soluble brown carbon.
As a preferred technical scheme of the present invention, the first centrifuge tank and the second centrifuge tank have the same internal structure, the first centrifuge tank and the second centrifuge tank form a sliding structure through a guide rail, a mounting frame and a linking frame arranged on the outer surface of the first centrifuge tank and the second centrifuge tank, and the guide rail is of an arc-shaped structure.
Adopt above-mentioned technical scheme, first centrifuging tank is the same with the inside mechanism and the filtering mechanism that sets up of second centrifuging tank to at first centrifuging tank and second centrifuging tank and mounting bracket and linking the guide rail that sets up between the frame, make first centrifuging tank and second centrifuging tank can be at the mounting bracket with link up the high-speed rotation between the frame, provide stronger centrifugal force for equipment.
As a preferable technical scheme of the invention, the outer surfaces of one ends of the first centrifugal tank and the second centrifugal tank are provided with gear rings, the inner surfaces of the gear rings are connected with an inert gear in a meshing manner, the other end of the inert gear is connected with a driving gear in a meshing manner, and the driving gear is connected to the outer surface of one end of the transmission shaft in a clamping manner.
By adopting the technical scheme, the first centrifugal tank and the second centrifugal tank are meshed with the inert gear through the gear ring, the other end of the inert gear is meshed with the driving gear for transmission, and the first centrifugal tank and the second centrifugal tank are in a rotating state under the driving of the transmission shaft.
According to the preferable technical scheme, the outer surface of the transmission shaft is provided with a mixing paddle board, a conveying channel is formed in the mixing paddle board, one end of the transmission shaft is provided with a turbine, the front end of the turbine is provided with a filter screen, and one end in the transmission shaft is of a hollow structure.
By adopting the technical scheme, when the transmission shaft rotates, the water-soluble materials are stirred and mixed through the arranged mixing paddle board, meanwhile, in the rotating process, the turbine, the air flow and the materials are driven, so that the turbine is in a rotating state, the materials are poured into the conveying channel inside the mixing paddle board and are discharged into the transmission shaft, and the materials are discharged into the transfer tank from the other end of the transmission shaft, so that the grading and quantifying effects are achieved.
As a preferable technical scheme of the invention, the movable shaft is of an inclined structure, cutting heads are distributed on the outer surface of the movable shaft at equal intervals, and third filter membranes are distributed on the outer surface of the cutting heads.
Adopt above-mentioned technical scheme, according to the inclination of loose axle, be convenient for discharge water-soluble material, cooperate the cutting head to carry out the breakage to the material simultaneously, at broken in-process, separate the sieve by the third filter membrane to the material, be convenient for separate out water-soluble brown carbon.
As a preferable technical scheme of the invention, a first spiral rod and a second spiral rod are respectively arranged on the outer surface of the movable shaft, and a first filter membrane is connected between the first spiral rod and the second spiral rod.
By adopting the technical scheme, the first screw rod and the second screw rod can suck the water-soluble materials discharged from the first centrifugal tank and the second centrifugal tank in a rolling way under the driving of the movable shaft, and the water-soluble materials can be further filtered by matching with the first filter membrane in the rolling and sucking process, so that the ultrafiltration effect of the first filter membrane is improved.
As a preferred technical scheme, through cavities are annularly distributed on the inner surface of the bottom of the transfer pot, a flow distribution channel is formed in the other end of each through cavity, second filter membranes are distributed in the flow distribution channel at equal intervals, and the flow distribution channel is connected with one end of a conveying pipe.
Adopt above-mentioned technical scheme, under centrifugal effect, inside water-soluble material discharged the reposition of redundant personnel passageway from logical chamber, carried out ultimate filtration to water-soluble material by layer upon layer second filter membrane, finally discharged the liquid storage pot from the conveyer pipe to holistic practicality has been increased.
Compared with the prior art, the invention has the beneficial effects that: the hierarchical quantitative ultrafiltration method based on the molecular-weight atmospheric brown carbon comprises the following steps:
1. when the transmission shaft rotates, the water-soluble materials are stirred and mixed through the arranged mixing paddle board, meanwhile, in the rotating process, the turbine, the air flow and the materials are transmitted, the turbine is in a rotating state, the materials are flushed into the conveying channel in the mixing paddle board and are discharged into the transmission shaft, and the materials are discharged into the transfer tank from the other end of the transmission shaft, so that the grading and quantifying effects are achieved, the water-soluble materials are conveniently discharged according to the inclination angle of the movable shaft, meanwhile, the materials are crushed by matching with the cutting head, and in the crushing process, the materials are separated and sieved through the third filter membrane, and the water-soluble brown carbon is conveniently separated;
2. first hob and second hob are under the drive of loose axle, can advance the entrainment to first centrifuge bowl and second centrifuge bowl discharged water soluble material, at the in-process of entrainment, cooperate first filter membrane, can be to the further filtration of water soluble material, improve first filter membrane ultrafiltration effect, under centrifugal effect, water soluble material is from leading to the chamber and discharging inside the reposition of redundant personnel passageway, carry out ultimate filtration to water soluble material by second filter membrane layer upon layer, the liquid storage pot is finally discharged from the conveyer pipe, thereby whole practicality has been increased.
Drawings
FIG. 1 is a schematic view of the interior of a rotary drum according to the present invention;
FIG. 2 is an enlarged view of the area A in FIG. 1 according to the present invention;
FIG. 3 is a schematic view of the internal front view of the propeller shaft and mixing paddle of the present invention;
FIG. 4 is a schematic view of the interior of the rotary vessel according to the present invention;
FIG. 5 is a schematic side view of a first centrifuge tank according to the present invention.
In the figure: 1. a transfer tank; 2. a mounting frame; 3. a first centrifuge tank; 4. a first centrifuge tank; 5. a servo motor; 6. a drive shaft; 7. a mixing paddle; 8. a linking frame; 9. a direct current motor; 10. a movable shaft; 11. a first screw rod; 12. a second screw rod; 13. a first filter membrane; 14. a cavity is communicated; 15. a flow dividing channel; 16. a second filter membrane; 17. a delivery pipe; 18. a liquid storage tank; 19. a turbine; 20. filtering with a screen; 21. a delivery channel; 22. a cutting head; 23. a third filter membrane; 24. a composite pipeline; 25. a drive gear; 26. an idler gear; 27. a ring gear; 28. a guide rail.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a hierarchical quantitative ultrafiltration method based on molecular-weight atmospheric brown carbon comprises a transfer tank 1 and a liquid storage tank 18, wherein a conveying pipe 17 is arranged between the transfer tank 1 and the liquid storage tank 18, a direct current motor 9 is arranged at the top end of the transfer tank 1, the output end of the direct current motor 9 is connected with a movable shaft 10, a connecting frame 8 is symmetrically arranged at the top end of the transfer tank 1, an installation frame 2 is arranged on the opposite surface of the connecting frame 8, a first centrifugal tank 3 and a second centrifugal tank 4 are connected between the installation frame 2 and the connecting frame 8, a servo motor 5 is arranged on the outer surface of one end of the installation frame 2, the output end of the servo motor 5 is connected with a transmission shaft 6, a filter screen 20 and a third filter screen 23 are arranged inside the first centrifugal tank 3 and the second centrifugal tank 4, a first filter screen 13 and a second filter screen 16 are arranged inside the transfer tank 1, and a comprehensive pipeline 24 is connected inside the first centrifugal tank 3 and the second centrifugal tank 4;
a hierarchical quantitative ultrafiltration method based on molecular-weight atmospheric brown carbon comprises the following steps:
s1, conveying the collected gas with brown carbon into a centrifugal device, adding 15mL of pure water into the centrifugal device, centrifuging for 30min, filtering by using a corresponding pore-size filter membrane with the diameter of 0.22 mu m on the centrifugal device, and discharging into a corresponding transfer device;
s2, adding 30mL of 0.1M NaOH into the transfer equipment in S1 to immerse the particle membrane subjected to ultrafiltration, then dropwise adding a proper amount of HCl, adjusting the pH value of the mixed solution to about 2, standing for 50min, filtering by using a 0.22-micrometer-aperture filtering membrane on the tank body, adding 10mL of methanol solution into other flow dividing channels not extracted to immerse the membrane, standing for 24h, taking out the membrane, and airing;
s3, respectively loading 15mL of water-soluble brown carbon and alkali-soluble brown carbon on the activated HLB column, collecting effluent liquid, adding 5mL of methanol to elute adsorbed components, and completing the ultrafiltration process of the water-soluble brown carbon.
The internal structures of the first centrifugal tank 3 and the second centrifugal tank 4 are the same, the first centrifugal tank 3 and the second centrifugal tank 4 form a sliding structure through a guide rail 28 arranged on the outer surface, the mounting frame 2 and the connecting frame 8, and the guide rail 28 is of an arc-shaped structure; the breaking mechanism and the filtering mechanism arranged in the first centrifugal tank 3 and the second centrifugal tank 4 are the same, and the guide rail 28 arranged between the first centrifugal tank 3 and the second centrifugal tank 4 and between the mounting frame 2 and the connecting frame 8 enables the first centrifugal tank 3 and the second centrifugal tank 4 to rotate at a high speed between the mounting frame 2 and the connecting frame 8, so that a strong centrifugal force is provided for equipment; the outer surfaces of one ends of the first centrifugal tank 3 and the second centrifugal tank 4 are provided with gear rings 27, the inner surfaces of the gear rings 27 are connected with an inertia gear 26 in a meshing manner, the other end of the inertia gear 26 is connected with a driving gear 25 in a meshing manner, and the driving gear 25 is connected to the outer surface of one end of the transmission shaft 6 in a clamping manner; the first centrifugal tank 3 and the second centrifugal tank 4 are meshed with an inert gear 26 through a gear ring 27, the other end of the inert gear 26 is meshed with a driving gear 25 for transmission, and the first centrifugal tank 3 and the second centrifugal tank 4 are driven by a transmission shaft 6 to be in a rotating state; the outer surface of the transmission shaft 6 is provided with a mixing paddle board 7, a conveying channel 21 is formed in the mixing paddle board 7, one end of the transmission shaft 6 is provided with a turbine 19, the front end of the turbine 19 is provided with a filter screen 20, and one end in the transmission shaft 6 is of a hollow structure; when the transmission shaft 6 rotates, the water-soluble materials are stirred and mixed through the arranged mixing paddle 7, meanwhile, in the rotating process, the turbine 19, the air flow and the materials are transmitted to enable the turbine to be in a rotating state, the materials flow into the conveying channel 21 in the mixing paddle 7 and are discharged into the transmission shaft 6, and the materials are discharged into the transfer tank 1 from the other end of the transmission shaft 6, so that the grading and quantifying effects are achieved; the movable shaft 10 is in an inclined structure, cutting heads 22 are distributed on the outer surface of the movable shaft 10 at equal intervals, and third filter membranes 23 are distributed on the outer surface of the cutting heads 22; according to the inclination angle of the movable shaft 10, water-soluble materials are conveniently discharged, meanwhile, the materials are crushed by matching with the cutting head 22, and in the crushing process, the materials are separated and sieved by the third filter membrane 23, so that water-soluble brown carbon is conveniently separated; a first screw rod 11 and a second screw rod 12 are respectively arranged on the outer surface of the movable shaft 10, and a first filter membrane 13 is connected between the first screw rod 11 and the second screw rod 12; the first screw rod 11 and the second screw rod 12 can suck the water-soluble materials discharged from the first centrifugal tank 3 and the second centrifugal tank 4 in a rolling way under the driving of the movable shaft 10, and the water-soluble materials can be further filtered by matching with the first filter membrane 13 in the rolling way, so that the ultrafiltration effect of the first filter membrane 13 is improved; the inner surface of the bottom of the transfer pot 1 is annularly provided with a through cavity 14, the other end of the through cavity 14 is provided with a flow distribution channel 15, second filter membranes 16 are distributed in the flow distribution channel 15 at equal intervals, and the flow distribution channel 15 is mutually connected with one end of a conveying pipe 17; under the centrifugal effect, the water-soluble material is discharged into the diversion channel 15 from the through cavity 14, the water-soluble material is finally filtered by the second filter membrane 16 layer by layer, and finally discharged into the liquid storage tank 18 from the conveying pipe 17, so that the overall practicability is increased.
The working principle is as follows: when the method for graded quantitative ultrafiltration based on molecular-weight atmospheric brown carbon is used, firstly gas containing brown carbon and pure water are discharged into a first centrifugal tank 3 and a second centrifugal tank 4, then a servo motor 5 is started to rotate a transmission shaft 6, the transmission shaft 6 stirs and mixes water-soluble materials through a mixing paddle board 7 arranged when rotating, simultaneously, a turbine 19 is transmitted with gas flow and materials during rotation to enable the transmission shaft to be in a rotating state, the materials are flushed into a conveying channel 21 inside the mixing paddle board 7 and discharged into the transmission shaft 6 and discharged into the transfer tank 1 from the other end of the transmission shaft 6, a removing mechanism and a filtering mechanism which are arranged inside the first centrifugal tank 3 and the second centrifugal tank 4 are the same, and guide rails 28 are arranged between the first centrifugal tank 3 and the second centrifugal tank 4 and a mounting rack 2 and a connecting rack 8, the first centrifugal tank 3 and the second centrifugal tank 4 can rotate at a high speed between the mounting frame 2 and the connecting frame 8 to provide a stronger centrifugal force for equipment, the first centrifugal tank 3 and the second centrifugal tank 4 are meshed with the inert gear 26 through the arranged gear ring 27, the other end of the inert gear 26 is meshed with the driving gear 25 for transmission, the first centrifugal tank 3 and the second centrifugal tank 4 are in a rotating state under the drive of the transmission shaft 6, water-soluble materials are conveniently discharged according to the inclination angle of the movable shaft 10, the materials are simultaneously crushed by matching with the cutting head 22, the materials are separated and sieved by the third filter membrane 23 in the crushing process, water-soluble brown carbon is conveniently separated out, the first screw rod 11 and the second screw rod 12 can suck the water-soluble materials discharged from the first centrifugal tank 3 and the second centrifugal tank 4 under the drive of the movable shaft 10, and in the sucking process, the cooperation is first filter membrane 13, can improve first filter membrane 13 ultrafiltration effect to the further filtration of water-soluble material, and under centrifugal effect, water-soluble material carries out ultimate filtration to water-soluble material from leading to inside cavity 14 row to reposition of redundant personnel passageway 15, by layer upon layer second filter membrane 16, finally arranges into liquid storage pot 18 from conveyer pipe 17 to holistic practicality has been increased.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The graded quantitative ultrafiltration method based on molecular-weight atmospheric brown carbon is characterized by comprising a transfer tank (1) and a liquid storage tank (18), wherein a conveying pipe (17) is arranged between the transfer tank (1) and the liquid storage tank (18), a direct current motor (9) is arranged at the top end of the transfer tank (1), the output end of the direct current motor (9) is connected with a movable shaft (10), linking frames (8) are symmetrically arranged at the top end of the transfer tank (1), mounting frames (2) are arranged on opposite surfaces of the linking frames (8), a first centrifugal tank (3) and a second centrifugal tank (4) are connected between the mounting frames (2) and the linking frames (8), a servo motor (5) is arranged on the outer surface of one end of each mounting frame (2), a transmission shaft (6) is connected with the output end of the servo motor (5), a filter screen (20) and a third filter membrane (23) are arranged inside each of the first centrifugal tank (3) and the second centrifugal tank (4), a first filter membrane (13) and a second filter membrane (16) are arranged in the transfer tank (1), and a comprehensive pipeline (24) is connected in the first centrifugal tank (3) and the second centrifugal tank (4);
the hierarchical quantitative ultrafiltration method based on the molecular-weight atmospheric brown carbon comprises the following steps:
s1, conveying the collected gas with brown carbon into a centrifugal device, adding 15mL of pure water into the centrifugal device, centrifuging for 30min, filtering by using a corresponding pore-size filter membrane with the diameter of 0.22 mu m on the centrifugal device, and discharging into a corresponding transfer device;
s2, adding 30mL of 0.1M NaOH into the transfer equipment in the S1 to immerse the particle membrane subjected to ultrafiltration, then dropwise adding a proper amount of HCl, adjusting the pH value of the mixed solution to about 2, standing for 50min, filtering by using a 0.22-micron pore-size filtering membrane on a tank body, adding 10mL of methanol solution into other flow dividing channels not extracted to immerse the membrane, standing for 24h, taking out the membrane, and airing;
s3, respectively loading 15mL of water-soluble brown carbon and alkali-soluble brown carbon on the activated HLB column, collecting effluent liquid, adding 5mL of methanol to elute adsorbed components, and completing the ultrafiltration process of the water-soluble brown carbon.
2. The fractional quantitative ultrafiltration method based on molecular-weight atmospheric brown carbon as claimed in claim 1, wherein: first centrifuge bowl (3) are the same with second centrifuge bowl (4) inner structure, first centrifuge bowl (3) and second centrifuge bowl (4) constitute sliding construction through guide rail (28) and mounting bracket (2) and linking frame (8) that the surface set up, guide rail (28) are arc column structure.
3. The fractional quantitative ultrafiltration method based on molecular-weight atmospheric brown carbon as claimed in claim 1, wherein: first centrifuge bowl (3) and second centrifuge bowl (4) one end surface are provided with ring gear (27), ring gear (27) internal surface meshing is connected with inertia gear (26), inertia gear (26) other end meshing is connected with drive gear (25), drive gear (25) block is connected at transmission shaft (6) one end surface.
4. The fractional quantitative ultrafiltration method based on molecular-weight atmospheric brown carbon as claimed in claim 1, wherein: the outer surface of the transmission shaft (6) is provided with a mixing paddle board (7), a conveying channel (21) is formed in the mixing paddle board (7), one end of the transmission shaft (6) is provided with a turbine (19), the front end of the turbine (19) is provided with a filter screen (20), and one end of the interior of the transmission shaft (6) is of a hollow structure.
5. The fractional quantitative ultrafiltration method based on molecular-weight atmospheric brown carbon as claimed in claim 1, wherein: the movable shaft (10) is of an inclined structure, cutting heads (22) are distributed on the outer surface of the movable shaft (10) at equal intervals, and third filter membranes (23) are distributed on the outer surface of the cutting heads (22).
6. The fractional quantitative ultrafiltration method based on molecular-weight atmospheric brown carbon as claimed in claim 1, wherein: the outer surface of the movable shaft (10) is provided with a first spiral rod (11) and a second spiral rod (12) respectively, and a first filter membrane (13) is connected between the first spiral rod (11) and the second spiral rod (12).
7. The fractional quantitative ultrafiltration method based on molecular-weight atmospheric brown carbon according to claim 1, characterized in that: the internal surface of the bottom of the transit tank (1) is annularly provided with a through cavity (14), the other end of the through cavity (14) is provided with a shunting channel (15), second filter membranes (16) are distributed in the shunting channel (15) at equal intervals, and the shunting channel (15) is connected with one end of a conveying pipe (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210427411.3A CN114887460A (en) | 2022-04-22 | 2022-04-22 | Hierarchical quantitative ultrafiltration method based on molecular-scale atmospheric brown carbon |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210427411.3A CN114887460A (en) | 2022-04-22 | 2022-04-22 | Hierarchical quantitative ultrafiltration method based on molecular-scale atmospheric brown carbon |
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| CN114887460A true CN114887460A (en) | 2022-08-12 |
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Application publication date: 20220812 |