CN211099866U - Multifunctional filter membrane production device - Google Patents
Multifunctional filter membrane production device Download PDFInfo
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- CN211099866U CN211099866U CN201921610848.0U CN201921610848U CN211099866U CN 211099866 U CN211099866 U CN 211099866U CN 201921610848 U CN201921610848 U CN 201921610848U CN 211099866 U CN211099866 U CN 211099866U
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Abstract
The utility model relates to a filter membrane production technical field discloses a multi-functional filtration membrane apparatus for producing, including dip-coating unit, roller coat unit, the glancing over that sets gradually scribble the unit and scribble four coating units of first unit, dip-coating unit, roller coat unit and the glancing over import and the outlet side of scribbling the unit are equipped with import driving roller and export driving roller respectively. The dip-coating unit comprises a dip-coating groove and a transmission roller group positioned in the dip-coating groove, the roller coating unit comprises a roller coating groove, a dip-coating roller with the lower part positioned in the roller coating groove and a first lifting mechanism positioned below the roller coating groove, the skimming unit comprises a U-shaped skimming groove, skimming rollers arranged at two bottom angles of the skimming groove and a second lifting mechanism positioned below the skimming groove, and the coating head unit comprises a coating head and a transmission roller positioned below the coating head. The utility model discloses set up the unit of four different functions in apparatus for producing, through mutually supporting of coating liquid kind in four units, can make the membrane product that the preparation was obtained diversified.
Description
Technical Field
The utility model belongs to the technical field of the filter membrane production technique and specifically relates to a multi-functional filtration membrane apparatus for producing is related to.
Background
The membrane refers to an interface which can transmit or retain certain fluid substances in a specific form, and the core technology of a membrane product mainly comprises two aspects of a formula and a production process. After decades of development, in the field of filter membrane materials, China has possessed a large number of filter membrane material preparation formulas, but the production equipment is always limited to traditional two-phase polymerization equipment, such as: patent CN106040010 discloses a reverse osmosis membrane production apparatus, which processes a base membrane into a reverse osmosis membrane through an unreeling device, a coating device and a drying device; patent CN106975368 discloses a method and apparatus for continuously preparing sulfonated polysulfone composite nanofiltration membrane, in the utility model, a discontinuous method is adopted to prepare a composite membrane; patent CN205966373 discloses a dip-coating device and a reverse osmosis membrane production device, which only describes the function of a dip-coating unit, but does not describe the unique effect of the dip-coating unit in the production of a filtration membrane.
The utility model has the defects of fixed process and single type of produced products. Finally, the membrane industry still suffers from three problems: 1. the investment progress of production equipment is slow, so that the iteration of a membrane product and the development of a new product are slow; 2. the use means allowed by the equipment is rigid, and many special technological development achievements cannot be realized on the existing production equipment; 3. the combination mode and the innovative use method of equipment and process are not involved.
Disclosure of Invention
The utility model relates to an it is fixed that there is the process in the technology and the device that overcome production filtration membrane among the prior art to adopt, the product type of production is single, lead to membrane product iteration and new product development slowly, and the problem that the special research and development achievement of a lot of technologies can't be realized on current production facility, a multi-functional filtration membrane apparatus for producing is provided, set up the unit of four different functions in apparatus for producing, mutually support through coating liquid kind in four units, can realize the milipore filter, receive the filter membrane, reverse osmosis membrane, the nimble conversion of different function filtration membrane production such as positive osmotic membrane, the membrane product that makes and prepares is diversified.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a multi-functional filtration membrane apparatus for producing, including dip-coating unit, roller coat unit, the unit of glancing over that sets gradually and scribble four coating units of first unit, the import and the outlet side of dip-coating unit, roller coat unit and the unit of glancing over are equipped with import driving roller and export driving roller respectively.
When the device is used for producing the filtering membrane, at least one of the four coating units is provided with a coating unit of aqueous phase coating liquid, the other three coating units are provided with aqueous phase coating liquid or organic phase coating liquid or are not provided with the coating liquid, and the supporting base membrane is coated sequentially through the dip coating unit, the roller coating unit, the skimming unit and the coating head unit under the action of the inlet driving rollers and the outlet driving rollers of the four coating units to obtain the multifunctional filtering membrane.
The utility model discloses set up the coating unit that four structures are different in apparatus for producing, because every coating unit's structure is different, the coating mode when supporting the base film through each coating unit is different for aperture, thickness, the compactness of the functional layer that forms are different, and consequently the selective permeability of the filtration membrane that finally obtains is just inequality. Therefore, the matching of different coating liquid formulas and four different coating modes can be realized by adjusting the types of the coating liquid in each coating unit, the filtering membranes with various functions such as ultrafiltration membranes, nanofiltration membranes, reverse osmosis membranes, forward osmosis membranes and the like can be produced, and the combination of the production process and the device is realized.
Preferably, the dip-coating unit comprises a dip-coating groove and a driving roller set positioned in the dip-coating groove, the driving roller set comprises a plurality of driving rollers which are arranged in a vertically staggered manner, and an inlet driving roller and an outlet driving roller of the dip-coating unit are respectively positioned above the inlet side and the outlet side of the dip-coating groove.
During production, the supporting base film enters the dip coating groove through the inlet driving roller positioned above the dip coating groove, sequentially bypasses all the driving rollers in the driving roller group, and then leaves the dip coating groove through the outlet driving roller to enter the next coating unit. The dip-coating tank is filled with coating liquid, the transmission roller group is immersed in the coating liquid, and the support base film can be contacted with the coating liquid to realize immersion when passing through the transmission roller group. Each driving roller in the driving roller group is arranged in a vertically staggered mode, so that the conveying path of the supporting base film can be prolonged, the supporting base film is fully soaked, the supporting base film can be effectively tensioned and flattened, and the supporting base film is prevented from being wrinkled.
Preferably, the roller coating unit comprises a roller coating groove, a dip coating roller with the lower part positioned in the roller coating groove, and a first lifting mechanism positioned below the roller coating groove, wherein the shape of the inner surface of the roller coating groove is matched with that of the dip coating roller, the inlet driving roller of the roller coating unit is positioned above the dip coating roller, and the outlet driving roller of the roller coating unit is positioned above the outlet side of the roller coating groove.
During production, the supporting base film is conveyed to the position above the dip coating roller through the inlet driving roller, then bypasses the position below the dip coating roller, and then leaves the roller coating groove through the outlet driving roller to enter the next coating unit. The roller coating groove is filled with coating liquid, the coating liquid is coated on the surface of the supporting base film through the dip coating roller, and the lifting mechanism can change the liquid level in the roller coating groove, so that the coating amount and the coating time of the coating liquid are changed, and the performance of the filter film is finally influenced.
Preferably, the skimming unit comprises a U-shaped skimming groove, skimming rollers arranged at two bottom angles of the skimming groove and a second lifting mechanism positioned below the skimming groove, the bottom angle of the skimming groove is matched with the skimming rollers in shape, the surface of the skimming rollers is attached to the bottom angle of the skimming groove, and an inlet driving roller and an outlet driving roller of the skimming unit are respectively positioned above the inlet side and the outlet side of the skimming groove.
During production, the support base film enters the skim coating groove through the inlet driving roller positioned above the skim coating groove, sequentially bypasses the bottoms of the two skim coating rollers, and then leaves the skim coating groove through the outlet driving roller to enter the next coating unit. And coating liquid is filled in the skimming groove, and the coating liquid is coated on the surface of the supporting base film under the pressure action of the two skimming rollers.
Preferably, the coating head unit comprises a coating head and a transmission roller positioned below the coating head, and the coating head is provided with a coating head lifting system and a coating head temperature control system. During production, the supporting base film passes below the coating head under the action of the driving roller, and the coating liquid is coated on the surface of the supporting base film through the coating head. Scribble first operating system and can change and scribble the head and support the distance between the base film to change the density and the coating effect of coating, scribble first temperature control system and can guarantee that coating solution is constant temperature, prevent that temperature change from resulting in the aperture and the performance of membrane to change.
Preferably, the coating head comprises one or more of a slot coating head, a curtain coating head or a slide coating head. The coating mode can be changed by adopting different coating head types, and the different coating modes can lead the structure and the performance of the functional layer generated on the supporting base film to be different, thereby leading the produced filtering membrane to have different performances.
Preferably, the outlet sides of the dip coating unit, the roller coating unit and the sweep coating unit are provided with liquid removing air knives. The liquid removing air knife is arranged on the outlet side of each coating unit, so that the coating liquid carried out from the coating unit on the surface of the supporting base film can be swept clean and then enters the next coating unit, and the phenomenon that the coating liquid of the subsequent coating unit is polluted and the performance of the produced filtering membrane is finally influenced is avoided.
Preferably, a temperature control system is arranged in the dip coating unit, the roller coating unit and the sweep coating unit. Set up temperature control system in the unit that coats, can guarantee that the coating process goes on under the constant temperature state, avoid temperature variation to lead to filtration membrane aperture change, influence filtration membrane's performance.
Therefore, the utility model discloses following beneficial effect has:
(1) the production device is provided with four coating units with different structures, the matching of different coating liquid formulas and four different coating modes can be realized by adjusting the types of the coating liquid in each coating unit, the conditions for realizing most of film material scientific research achievements are met, the research and development and production work of ultrafiltration membranes, nanofiltration membranes, reverse osmosis membranes and forward osmosis membranes can be realized, the switching can be flexibly carried out, and the prepared film products are diversified;
(2) the method for combining the process and the device is provided, the advantages of the four coating units are exerted, multiple functions are formed, the iteration speed and the new product development speed of the film product are improved, the space is saved, the labor cost, the material cost and the time cost are reduced, and the scientific research and production efficiency is improved.
Drawings
FIG. 1 is a schematic view of a film-feeding structure of the present invention;
FIG. 2 is a schematic structural diagram of a dip-coating unit in the present invention;
FIG. 3 is a schematic structural diagram of a roller coating unit in the present invention;
FIG. 4 is a schematic structural view of a coating unit of the present invention;
fig. 5 is a schematic structural diagram of the coating head unit of the present invention.
In the figure: 1 dip coating unit, 101 dip coating tank, 1021 first drive roller, 1022 second drive roller, 1023 third drive roller, 1024 fourth drive roller, 1025 fifth drive roller, 103 dip coating unit inlet drive roller, 104 dip coating unit outlet drive roller, 2 roll coating unit, 201 roll coating tank, 202 dip coating roller, 203 first lifting mechanism, 204 roll coating unit inlet drive roller, 205 roll coating unit outlet drive roller, 3 sweep coating unit, 301 sweep coating tank, 302 sweep coating roller, 303 second lifting mechanism, 304 sweep coating unit inlet drive roller, 305 sweep coating unit outlet drive roller, 4 coating head unit, 401 coating head, 402 drive roller, coating head lifting system, 404 coating head temperature control system, 5 support base film, 6 liquid removing air knife.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
The utility model discloses in use a multi-functional filtration membrane apparatus for producing, as shown in fig. 1, including dip-coating unit 1, roller coat unit 2, sweep and scribble unit 3 and scribble first unit 4 four coating units that set gradually.
As shown in fig. 2, the dip-coating unit includes a square dip-coating tank 101 and a driving roller set located in the dip-coating tank, the driving roller set includes five driving rollers staggered up and down, wherein the first driving roller 1021, the third driving roller 1023 and the fifth driving roller 1025 are located at the bottom of the dip-coating tank and located on the same straight line, and the second driving roller 1022 and the fourth driving roller 1024 are located at the upper part of the dip-coating tank and located on the same straight line. The dip-coating tank is internally provided with a temperature control system, the upper side of one side of the inlet of the dip-coating unit is provided with a dip-coating unit inlet driving roller 103, the upper side of one side of the outlet of the dip-coating unit is provided with a dip-coating unit outlet driving roller 104, and the upper side of the dip-coating unit outlet driving roller is provided with a liquid removing air knife 6.
As shown in fig. 3, the roller coating unit includes a roller coating tank 201, a dip coating roller 202 whose lower part is located in the roller coating tank, and a first lifting mechanism 203 located below the roller coating tank, the outer surface of the roller coating tank is in an inverted trapezoid shape, the inner surface of the roller coating tank is matched with the dip coating roller in shape, and a temperature control system is arranged in the dip coating tank. A roller coating unit inlet driving roller 204 is arranged on one side, close to the roller coating unit inlet, above the dip coating roller, a roller coating unit outlet driving roller 205 is arranged above one side, close to the roller coating unit inlet, of the roller coating groove, and a liquid removing air knife is arranged between one side, close to the outlet of the roller coating groove, of the roller coating groove and the roller coating unit outlet driving roller.
As shown in fig. 4, the sweep coating unit includes a U-shaped sweep coating tank 301, sweep coating rollers 302 disposed at two bottom corners of the sweep coating tank, and a second lifting mechanism 303 located below the sweep coating tank, the bottom corners of the sweep coating tank are matched in shape with the sweep coating rollers, the surface of the sweep coating rollers is attached to the bottom corners of the sweep coating tank, and a temperature control system is disposed in the sweep coating tank. A skimming groove inlet driving roller 304 is arranged above one side of the inlet of the skimming groove, a skimming groove outlet driving roller 305 is arranged above one side of the outlet, and a liquid removing air knife is arranged between the outlet side of the skimming groove and the skimming unit outlet driving roller.
As shown in fig. 5, the coating head unit includes a coating head 401 and a driving roller 402 located below the coating head, the coating head is a slit coating head, and a coating head lifting system 403 and a coating head temperature control system 404 are provided on the coating head.
(the temperature control system used in the utility model is a conventional device in the prior art, not the key point of the utility model.)
When the coating head is used, at least one of the dip coating tank, the roller coating tank, the sweep coating tank and the coating head is provided with the aqueous phase coating liquid, and the other three are provided with the aqueous phase coating liquid or the organic phase coating liquid or are not provided with the coating liquid. The supporting base film 5 is conveyed into the dip-coating groove through the dip-coating unit inlet driving roller, and after the supporting base film is sequentially wound below the first driving roller, above the second driving roller, below the third driving roller, above the fourth driving roller and below the fifth driving roller, the supporting base film is fully soaked by coating liquid in the dip-coating groove, and then the supporting base film leaves the dip-coating groove through the dip-coating unit outlet driving roller and enters the roller coating unit. When the coating liquid passes through the outlet transmission roller of the dip-coating unit, the liquid removing air knife above the outlet transmission roller of the dip-coating unit can sweep the coating liquid on the supporting base film completely, so that the coating liquid in the subsequent unit is prevented from being polluted.
The supporting base film is conveyed to the upper part of the dip-coating roller through the outlet driving roller of the dip-coating unit and then the inlet driving roller of the roller coating unit, then the supporting base film bypasses the lower part of the dip-coating roller, the coating liquid in the roller coating groove is coated on the surface of the supporting base film through the dip-coating roller, and then the supporting base film leaves the roller coating groove through the outlet driving roller of the roller coating unit and enters the next coating unit. The first lifting mechanism can change the liquid level in the roller coating tank, so that the coating amount and the coating time of the coating liquid are changed, and the performance of the filter membrane is finally influenced.
And then the support base film is conveyed into the skimming groove through a driving roller at the inlet of the skimming unit, sequentially bypasses the bottoms of the two skimming rollers, coats the coating liquid in the skimming groove on the surface of the support base film under the pressure action of the two skimming rollers, and then leaves the skimming groove through the driving roller at the outlet of the skimming unit to enter the next coating unit.
And finally, the supporting base film passes through the lower part of the coating head under the action of the driving roller, the coating liquid is coated on the surface of the supporting base film through the coating head, and the filtering film is prepared after drying. Scribble first operating system and can change and scribble the head and support the distance between the base film to change the density and the coating effect of coating, scribble first temperature control system and can guarantee that coating solution is constant temperature, prevent that temperature change from resulting in the aperture and the performance of membrane to change.
In examples 1 to 31, filtration membranes were produced using the same aqueous phase coating solution and organic phase coating solution formulation system, with only the combination of the aqueous phase coating solution and the organic phase coating solution being changed in the four coating units of the production apparatus described above, and the water flux and rejection rate of the produced filtration membranes were measured.
The preparation of the aqueous coating solutions referred to in examples 1 to 31: mixing the components in a mass ratio of 0.5: and mixing 99.5 of piperazine and deionized water, and stirring at a high speed for 0.5h until the piperazine and the deionized water are completely dissolved to obtain the water-phase coating solution.
The preparation method of the organic phase coating liquid comprises the following steps: mixing the components in a mass ratio of 0.15: 99.85 of trimesoyl chloride and ethyl cyclohexane solvent, and stirring at high speed until the trimesoyl chloride is completely dissolved to form the organic phase coating liquid.
The preparation method of the filter membrane comprises the following steps: and (2) enabling the porous polysulfone support base membrane to sequentially pass through each coating unit, wherein the contact time in each coating unit is 2s, obtaining a nascent filter membrane, drying the nascent filter membrane in a drying oven at 60 ℃ for 1min, washing the nascent filter membrane with hot water at 80 ℃ for 5min, soaking the nascent filter membrane in 8% glycerol for 2min, taking out the nascent filter membrane and drying the nascent filter membrane at 60 ℃ to obtain the filter membrane.
Testing method of performance of the filtering membrane: 500ppm magnesium sulfate (MgSO) at a test pressure of 0.50MPa and a test temperature of 25 deg.C4) And 1000ppm of aqueous sodium chloride (NaCl) were subjected to a cross-flow filtration test.
The results of the performance tests of the coating liquid combinations used in examples 1 to 31 and the produced filtration membranes are shown in Table 1.
Table 1: examples 1-31 filtration membrane production conditions and performance test results.
As can be seen from Table 1, the same aqueous and organic coating formulation system was used, with only changes to eachThe selection and combination of the coating liquid in each coating unit realizes the membrane performance regulation in a wide range, and the obtained filtering membrane performance is as follows: for MgSO4The retention rate range is 32-99%, and the retention rate of sodium chloride reaches the range of 2-93%.
In example 32 and example 33:
preparing an aqueous phase solution A: mixing the components in a mass ratio of 0.5: 99.5 parts of glutaraldehyde and deionized water are mixed and stirred at high speed for 0.5h until the glutaraldehyde and the deionized water are completely dissolved.
Preparing an aqueous phase solution B: mixing the components in a mass ratio of 0.2: 99.8 polyvinyl alcohol and deionized water are mixed and stirred at high speed for 0.5h until the polyvinyl alcohol is completely dissolved.
Preparing an aqueous phase solution C: mixing the components in a mass ratio of 0.2: 99.8 of polyethyleneimine and deionized water are mixed and stirred at high speed for 0.5h until the polyethyleneimine is completely dissolved.
The preparation method of the filter membrane comprises the following steps: the contact time of the support base film with aqueous solution A was 5s, and the contact time with aqueous solutions B and C was 2s, all the rest being the same as in examples 1 to 31.
Testing method of performance of the filtering membrane: 500ppm of polyethylene glycol (PEG-1000) and 1000ppm of calcium chloride (CaCl) are adopted under the test conditions of 0.30MPa test pressure and 25 DEG C2) The aqueous solution was subjected to a cross-flow filtration test.
The results of the performance tests of the coating liquid combinations used in examples 32 and 33 and the produced filtration membranes are shown in Table 2.
Table 2: examples 32 and 33 filter membrane production conditions and performance test results.
As can be seen from table 2, with the same selection and combination of coating units, only the formulation of the coating solution was changed, producing two filtration membranes with very different properties. The filtration membrane obtained in example 32 had high rejection of only organic substances and almost zero rejection of inorganic salts; the filtration membrane obtained in example 33 had high retention of both organic and inorganic salts.
To sum up, the utility model discloses can realize the device dozens of kinds of application method's fast switch-over to finally realize the research and development and the production of filtration membrane material of different performance.
Claims (8)
1. The utility model provides a multi-functional filtration membrane apparatus for producing, characterized by, including dip-coating unit, roller coat unit, the unit of glancing over and scribble four coating units of first unit that set gradually, the import and the outlet side of dip-coating unit, roller coat unit and the unit of glancing over are equipped with import driving roller and export driving roller respectively.
2. The multifunctional filtering membrane production device according to claim 1, wherein the dip-coating unit comprises a dip-coating tank and a driving roller set positioned in the dip-coating tank, the driving roller set comprises a plurality of driving rollers which are staggered up and down, and an inlet driving roller and an outlet driving roller of the dip-coating unit are respectively positioned above an inlet side and an outlet side of the dip-coating tank.
3. The multifunctional filtering membrane production device according to claim 1, wherein the roller coating unit comprises a roller coating tank, a dip coating roller with the lower part positioned in the roller coating tank, and a first lifting mechanism positioned below the roller coating tank, the shape of the inner surface of the roller coating tank is matched with that of the dip coating roller, an inlet driving roller of the roller coating unit is positioned above the dip coating roller, and an outlet driving roller of the roller coating unit is positioned above the outlet side of the roller coating tank.
4. The multifunctional filtering membrane production device of claim 1, wherein the skimming unit comprises a U-shaped skimming groove, skimming rollers arranged at two bottom corners of the skimming groove, and a second lifting mechanism positioned below the skimming groove, the bottom corners of the skimming groove are matched in shape with the skimming rollers, the surface of the skimming rollers is attached to the bottom corners of the skimming groove, and an inlet driving roller and an outlet driving roller of the skimming unit are respectively positioned above an inlet side and an outlet side of the skimming groove.
5. The multifunctional filtering membrane production device according to claim 1, wherein the coating head unit comprises a coating head and a driving roller positioned below the coating head, and a coating head lifting system and a coating head temperature control system are arranged on the coating head.
6. A multifunctional filtering membrane production device according to claim 5, characterized in that the coating head comprises one or more of a slit coating head, a curtain coating head or a slide coating head.
7. The multifunctional filtering membrane production device of claim 1, wherein one side of the outlet of the dip coating unit, the roller coating unit and the skimming unit is provided with a liquid removing air knife.
8. The multifunctional filtering membrane production device of claim 1, wherein a temperature control system is arranged in the dip coating unit, the roller coating unit and the skimming unit.
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| CN201921610848.0U CN211099866U (en) | 2019-09-25 | 2019-09-25 | Multifunctional filter membrane production device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111097652A (en) * | 2019-09-25 | 2020-05-05 | 宁波水艺膜科技发展有限公司 | Multifunctional filtering membrane production process and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111097652A (en) * | 2019-09-25 | 2020-05-05 | 宁波水艺膜科技发展有限公司 | Multifunctional filtering membrane production process and device |
| CN111097652B (en) * | 2019-09-25 | 2021-11-09 | 宁波水艺膜科技发展有限公司 | Multifunctional filtering membrane production process and device |
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