CN211302688U - Equipment for manufacturing filtering membrane without supporting layer - Google Patents
Equipment for manufacturing filtering membrane without supporting layer Download PDFInfo
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- CN211302688U CN211302688U CN201921906200.8U CN201921906200U CN211302688U CN 211302688 U CN211302688 U CN 211302688U CN 201921906200 U CN201921906200 U CN 201921906200U CN 211302688 U CN211302688 U CN 211302688U
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Abstract
The utility model discloses a no supporting layer filtration membrane's manufacture equipment, this embodiment does not have supporting layer filtration membrane's manufacture equipment, including supporting layer unwinding device, supporting layer heating device, membrane casting liquid coating device, constant temperature and humidity case, first basin, supporting layer coiling mechanism, second basin, filtration membrane drying device, filtration membrane coiling mechanism. The utility model discloses owing to heat the supporting layer to the temperature of settlement in advance for the steam in supporting layer surface temperature invariant and can get rid of the supporting layer upper band, make the size uniformity in filtration membrane surface hole improve greatly, because do not have the non-woven fabrics as the supporting layer, the condition that filtration membrane and supporting layer peeled off can not appear in the product, the fibrous condition can not appear yet. The whole process is accurate and controllable, and the yield is greatly improved.
Description
Technical Field
The utility model relates to a filtration membrane field of making, concretely relates to no supporting layer filtration membrane's manufacture equipment.
Background
The membrane separation has the characteristics of simple operation, strong adaptive process condition, large amount of filtered liquid and the like, and is widely applied to the pharmaceutical industry, the microelectronic industry, the food and beverage industry, the chemical industry, the water treatment industry and the like. In the early filter membrane, the membrane casting solution is generally scraped on a porous coiled material such as a non-woven fabric by a scraper, and then phase separation membrane formation is carried out through a constant temperature and humidity channel, and the filter membrane and the non-woven fabric are used as a filter material together. The filtration membranes formed by this process have several drawbacks: (1) the filtering membrane can be prevented from being separated from the non-woven fabric only by the fact that the non-woven fabric is required to be adhered with good adhesive strength, and if the adhesive strength is not enough, the filtering membrane is likely to be torn and then enters liquid to be filtered, so that the product can not meet the requirements; (2) in addition, the surface of the non-woven fabric is rough and the non-woven fabric is used as a supporting layer, so that the thickness of the membrane is uneven, and the uniformity of filtration is difficult to ensure; c. the existence of the non-woven fabric can affect the flux of the filter membrane; (3) the falling of the fibers on the non-woven fabric can affect the liquid filtration, so that the liquid can not meet the requirements. It is a great trend to develop films without nonwoven as a support layer.
The relatively common apparatus for the production of filter membranes without support layers (as described in patent US 9005496) now takes the form of a circulating metal belt, which has the major drawbacks: the bottom of the metal belt is generally exposed in a room temperature environment, the water vapor on the supporting layer influences the film forming quality, and in addition, the bottom of the metal belt is exposed in the air to cause the surface temperature of the metal belt to be not constant in a repeated heating and cooling process, so that the film product is unstable.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a comparatively stable no supporting layer filtration membrane's of filtration membrane finished product quality manufacture equipment.
The utility model provides a technical scheme that above-mentioned problem adopted is:
the manufacturing equipment of the supporting layer-free filtering membrane comprises a supporting layer unreeling device, wherein the supporting layer unreeling device is used for unreeling and rotating a coiled supporting layer; the supporting layer heating device is used for heating the working surface of the supporting layer to a set temperature; the casting solution coating device is used for uniformly coating the casting solution on the surface of the supporting layer; the constant temperature and humidity box is used for generating a constant temperature and humidity environment, so that the membrane casting solution on the surface of the supporting layer is exchanged with water vapor to form a filtering membrane; the first water tank is used for cleaning the filtering membrane and further shaping; the supporting layer rolling device is used for rolling the supporting layer; the device comprises a filtering membrane rolling device and a supporting layer, wherein the filtering membrane rolling device is used for rolling a filtering membrane to realize the separation of the supporting layer and the membrane, so that a microporous membrane without the supporting layer is formed, and the supporting layer rolling device, the supporting layer heating device, the casting membrane liquid coating device, the constant temperature and humidity box, the first water tank, the supporting layer rolling device and the filtering membrane rolling device are sequentially arranged along the moving direction of the supporting layer.
Further, as a preferable mode, the device also comprises a second water tank, wherein the second water tank is used for cleaning the separated filtering membrane so as to meet the downstream requirements (such as the dissolved matter aspect); and the filtering membrane drying device is used for drying the cleaned filtering membrane so as to control the water content of the filtering membrane, and the supporting layer winding device, the second water tank and the filtering membrane drying device are sequentially arranged along the moving direction of the filtering membrane.
Further, preferably, the casting solution coating apparatus employs a blade coating apparatus or a coating die.
Further, the heating device preferably adopts an infrared heating channel, a heating roller or a hot air heating oven.
Further, as a preferred option, the supporting layer heating device comprises a heating roller and a winding guide mechanism for covering the supporting layer on the surface of the heating roller, the winding guide mechanism comprises at least two rollers, the two rollers are close to the surface of the heating roller, the supporting layer penetrates between the two rollers, the working surface of the supporting layer is covered on the surface of the heating roller, and then the supporting layer penetrates between the two rollers.
Further, as preferred, the scraper coating device comprises a trough for containing the casting solution, a scraper supporting roller and a scraper, wherein the trough and the scraper are fixed above the scraper supporting roller, the supporting layer penetrates through the position between the scraper supporting roller and the scraper, and the lower surface of the supporting layer is supported on the scraper supporting roller.
Compared with the prior art, the utility model, have following advantage and effect: the utility model discloses owing to heat the supporting layer to the temperature of settlement in advance through supporting layer heating device for strap surface temperature is invariable and can get rid of the vapor of supporting layer upper band, makes the size uniformity in filtration membrane surface hole improve greatly, makes filtration membrane finished product quality comparatively stable. Because the manufacturing line does not use non-woven fabrics as supporting layers, the peeling of the filter membrane and the supporting layers and the fiber falling of the product can not occur. The whole process is accurate and controllable, the thickness of the film is uniform, and the yield is greatly improved.
Drawings
FIG. 1 is a schematic layout of an apparatus for manufacturing a filter membrane without a support layer according to an embodiment of the present invention.
The figures are numbered as follows: 1-a supporting layer unreeling device, 2-a supporting layer heating device, 3-a casting solution coating device, 4-a constant temperature and humidity box, 5-a first water tank, 6-a supporting layer reeling device, 7-a second water tank, 8-a filtering membrane drying device, 9-a filtering membrane reeling device, 9, 51, 71-transmission rollers, 21-a heating roller, 22-rolling shafts, 31-a material tank, 32-a scraping blade supporting roller, 33-a scraping blade, 101-a supporting layer and 102-a filtering membrane supporting roller
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Referring to fig. 1, the apparatus for manufacturing a filtering membrane without a supporting layer in this embodiment includes a supporting layer unwinding device 1, a supporting layer heating device 2, a casting solution coating device 3, a constant temperature and humidity chamber 4, a first water tank 5, a supporting layer winding device 6, a second water tank 7, a filtering membrane drying device 8, and a filtering membrane winding device 9. The support layer unreeling device 1, the support layer heating device 2, the casting film liquid coating device 3, the constant temperature and humidity box 4, the first water tank 5 and the support layer reeling device 6 are sequentially arranged along the moving direction of the support layer 101. The supporting layer winding device 6, the second water tank 7, the filtering membrane drying device 8 and the filtering membrane winding device 9 are sequentially arranged along the moving direction of the filtering membrane 102.
In this embodiment, the plurality of driving rollers 51 and 71 are provided in both the first water tank 5 and the second water tank 7, so that the stroke of the filter membrane 102 in the water tanks is increased, and the sizing and cleaning effects are improved.
In this embodiment, the supporting layer heating device 2 includes a heating roller 21 and a winding mechanism for coating the supporting layer 101 on the surface of the heating roller 21, the winding mechanism includes at least two rollers 22, the two rollers 22 are close to the surface of the heating roller 21, the supporting layer 101 penetrates between the two rollers 22, and the working surface of the supporting layer 101 is coated on the surface of the heating roller 21, and then penetrates between the two rollers 22. The effect of the roll guiding structure is mainly to ensure that the working surface of the supporting layer 101 is always attached to the heating roller 21, and the contact surface of the supporting layer 101 is ensured to reach the set temperature preferentially, and in addition, because the working surface of the supporting layer 101 is in contact with the heating roller 21, the long-time contact with air is avoided, and the surface water vapor condensation is caused. The heating roller 21 is only one of the heating forms, and heating by a hot air channel, an infrared heating channel, a hot air oven, an infrared oven, or the like can be selected.
In this embodiment, the casting solution coating device 3 is a scraper 33 coating device, the scraper 33 coating device includes a trough 31 for containing the casting solution, a scraper supporting roller 32 and a scraper 33, the trough 31 and the scraper 33 are fixed above the scraper supporting roller 32, the supporting layer 101 passes through between the scraper supporting roller 32 and the scraper 33, and the lower surface of the supporting layer 101 is supported on the scraper supporting roller 32. The thickness of the coating film can be adjusted by the distance between the blade 33 and the support roll, and the blade 33 is heated by a heating device, so that the temperature of the blade 33 can be controlled. The doctor blade 33 may be replaced with a coating die or the like.
In this embodiment, the filtering membrane drying device 8 is an oven, the filtering membrane 102 passes through the oven to be dried, the oven is only one of the heating forms, and the heating can be performed by a circular heating roller 21, an infrared heating channel, and other devices.
The number of the first water tank 5, the second water tank 6 and the filtering membrane drying device 8 is not limited to one, and the process conditions can be adjusted.
The manufacturing equipment of the embodiment manufactures the filtering membrane 102 without the supporting layer 101 by the following process:
step S1, the supporting layer unwinding device 1 rotates to unwind and rotate the rolled supporting layer 101, and then the supporting layer 101 is heated to a predetermined temperature by passing through the surface of the heating roller 21 of the supporting layer heating device 2;
step S2, the supporting layer 101 passes through the casting solution coating device 3, the supporting layer 101 penetrates through the space between the scraper supporting roller 32 and the scraper 33, the lower surface of the supporting layer 101 is supported on the scraper supporting roller 32, and the casting solution is uniformly coated on the surface of the supporting layer 101 through the scraper 33 of the casting solution coating device 3;
step S3, when the supporting layer 101 passes through the constant temperature and humidity chamber 4, in the process, the membrane casting solution on the surface of the supporting layer 101 exchanges with water vapor to form a filtering membrane 102 under the constant temperature and humidity environment in the constant temperature and humidity chamber 4;
step S4, the filter membrane 102 enters the first water tank 5 along with the support layer 101, and the first water tank 5 cleans the filter membrane 102 for further shaping;
step S5, the supporting layer rolling device 6 rolls the supporting layer 101, the supporting layer 101 is separated from the filter membrane 102 to form the filter membrane 102 without a supporting layer, and the filter membrane 102 continues to move;
step S6, the filtering membrane 102 enters the second water tank 7, and the second water tank 7 cleans the filtering membrane 102;
in step S7, the filtering membrane 102 enters the filtering membrane drying device 8 to be dried, so as to control the water content of the filtering membrane 102.
In step S8, the filtration membrane winding device 9 winds the filtration membrane 102 and then winds the filtration membrane 102 to form a wound filtration membrane 102.
In the above step, the separated support layer 101 is not used next time. In this way, the support layer 101 is used only once, and no residue is caused to affect the film forming effect.
In the specific implementation process, the material selection of the supporting layer needs to ensure that the strength is high and the surface of the material is smooth, the softening temperature of the surface of the material is higher than the heating temperature, and the surface of the supporting layer is smooth and flat. The type of the support layer 101 can be selected from a flaky metal coiled material (such as aluminum foil, tinfoil, steel strip, copper and the like) or a macromolecular flaky coiled material with low elongation (such as high molecular materials such as PET, PBT, HDPE, PI and the like), and by adopting the mode, the thickness of the support layer 101 is uniform, the thickness fluctuation of the membrane is greatly reduced, the surface of the support layer 101 is smooth and flat, and the membrane 102 can be smoothly peeled from the filter membrane 102 after being formed.
In step S1, the surface of the support layer 101 is heated to a temperature of 25 ℃ to 100 ℃; in step S2, heating the casting solution to 25-100 ℃; in step S3, the temperature is controlled to be 25-100 ℃, and the humidity is controlled to be 1-100%; in step S2, the moving speed of the supporting belt is 0.1-50 m/min; and step S7, the drying stroke is 0.1-100 m.
In the process, the supporting layer 101 is heated to the set temperature in advance, so that the surface temperature of the supporting layer is constant, the water vapor on the upper surface of the supporting layer can be removed, the size uniformity of the surface holes of the filtering membrane is greatly improved, the non-woven fabric is not used as the supporting layer, the situation that the filtering membrane and the supporting layer 101 are peeled off cannot occur in the product, and the situation of fiber falling cannot occur. The whole process is accurate and controllable, and the yield is greatly improved.
The structure of the pores of the filter membrane can be controlled by:
t0 is the temperature of the air in step S3, T1 is the temperature to which the support layer is heated in step S1, and T2 is the temperature of the casting solution in step S2.
(1) The filtration membrane structure with the upper big hole and the lower small hole: controlling T0 to be more than T1, and reducing the viscosity of the bottom layer casting solution due to the lower temperature of the supporting layer, wherein the water vapor in the upper layer of air just permeates from the upper layer of the casting solution to the junction of the lower layer of the casting solution with reduced viscosity, so that a filtering membrane structure with big holes on the upper surface and small holes on the lower surface is formed;
(2) the filtration membrane structure of the above small hole and small large hole: controlling T0 to be less than T1, wherein the viscosity of the bottom layer casting solution is increased due to the higher temperature of the supporting layer, and the water vapor in the upper layer of air just permeates from the upper layer of the casting solution to the junction of the lower layer of the casting solution with the increased viscosity, so that a filtering membrane structure with small upper holes and small and large lower holes is formed;
(3) the upper and lower surfaces are provided with big holes, and the middle part is provided with a small hole: controlling T0 to be more than T2 and T1 to be more than T2, wherein the viscosity of the upper layer casting solution and the bottom layer casting solution is increased due to the higher air temperature and the higher temperature of the supporting layer, and water vapor in the air cannot reach an interface with the increased viscosity of the lower layer due to the speed relation, so that a filtering membrane structure with big holes at the upper part and the lower part and small holes at the middle part is formed;
(4) the upper and lower surfaces are small holes, and the middle part is a large-hole filtering membrane structure: controlling T0 < T2 and T1 < T2, the viscosity of the upper layer casting solution and the bottom layer casting solution is reduced due to the lower air temperature and the temperature of the supporting layer, and water vapor in the air cannot reach the interface with the increased viscosity of the lower layer due to the speed relation, so that a filtering membrane structure with small holes at the upper part and the lower part and large holes in the middle is formed.
The above description in this specification is merely illustrative of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (5)
1. An apparatus for manufacturing a filtration membrane without a support layer, comprising: comprises that
The support layer unreeling device (1), the support layer unreeling device (1) is used for unreeling and rotating the coiled support layer (101);
the supporting layer heating device (2), the supporting layer heating device (2) is used for heating the working surface of the supporting layer (101) to a set temperature;
the casting solution coating device (3) is used for uniformly coating the casting solution on the surface of the supporting layer (101);
the constant temperature and humidity box (4) is used for generating a constant temperature and humidity environment, so that the membrane casting solution on the surface of the supporting layer (101) exchanges with water vapor to form a filtering membrane (102);
the first water tank (5), the first water tank (5) is used for cleaning the filtering membrane (102) and further shaping;
the supporting layer winding device (6), the supporting layer winding device (6) is used for winding the supporting layer (101);
a filtering membrane rolling device (9), the filtering membrane rolling device (9) is used for rolling the filtering membrane (102),
the device comprises a supporting layer unreeling device (1), a supporting layer heating device (2), a membrane casting solution coating device (3), a constant temperature and humidity box (4), a first water tank (5), a supporting layer reeling device (6) and a filtering membrane reeling device (9), wherein the supporting layer unreeling device, the supporting layer heating device (2), the membrane casting solution coating device, the constant temperature and humidity box and the filtering membrane reeling device are sequentially arranged along the moving direction of a supporting.
2. The apparatus for manufacturing a support-layer-free filtration membrane according to claim 1, wherein: also comprises
A second water tank (7), wherein the second water tank (7) is used for cleaning the separated filtering membrane (102);
a filtering membrane drying device (8), wherein the filtering membrane drying device (8) is used for drying the cleaned filtering membrane (102) so as to control the water content of the filtering membrane (102),
wherein, the supporting layer coiling device (6), the second water tank (7) and the filtering membrane drying device (8) are sequentially arranged along the moving direction of the filtering membrane (102).
3. The apparatus for manufacturing a support-layer-free filtration membrane according to claim 1, wherein: the heating device adopts an infrared heating channel, a heating roller (21) or a hot air heating oven.
4. The apparatus for manufacturing a support-layer-free filtration membrane according to claim 1, wherein: the supporting layer heating device (2) comprises a heating roller (21) and a winding guide mechanism for coating the supporting layer (101) on the surface of the heating roller (21), wherein the winding guide mechanism comprises at least two rollers (22), the two rollers (22) are close to the surface of the heating roller (21), the supporting layer (101) penetrates between the two rollers (22) and is wound on the surface of the heating roller (21) and then penetrates between the two rollers (22).
5. The apparatus for manufacturing a support-layer-free filtration membrane according to claim 1, wherein: the scraper coating device comprises a trough (31) for containing casting solution, a scraper supporting roller (32) and a scraper (33), wherein the trough (31) and the scraper (33) are fixed above the scraper supporting roller (32), a supporting layer (101) penetrates through the position between the scraper supporting roller (32) and the scraper (33), and the lower surface of the supporting layer (101) is supported on the scraper supporting roller 32.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921906200.8U CN211302688U (en) | 2019-11-06 | 2019-11-06 | Equipment for manufacturing filtering membrane without supporting layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921906200.8U CN211302688U (en) | 2019-11-06 | 2019-11-06 | Equipment for manufacturing filtering membrane without supporting layer |
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| Publication Number | Publication Date |
|---|---|
| CN211302688U true CN211302688U (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921906200.8U Active CN211302688U (en) | 2019-11-06 | 2019-11-06 | Equipment for manufacturing filtering membrane without supporting layer |
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| CN (1) | CN211302688U (en) |
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- 2019-11-06 CN CN201921906200.8U patent/CN211302688U/en active Active
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