CN111185097A - Roll up formula membrane module, compound filter element group spare and water purification system - Google Patents
Roll up formula membrane module, compound filter element group spare and water purification system Download PDFInfo
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- CN111185097A CN111185097A CN202010103189.2A CN202010103189A CN111185097A CN 111185097 A CN111185097 A CN 111185097A CN 202010103189 A CN202010103189 A CN 202010103189A CN 111185097 A CN111185097 A CN 111185097A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/10—Supported membranes; Membrane supports
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/10—Spiral-wound membrane modules
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/26—Further operations combined with membrane separation processes
- B01D2311/2649—Filtration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/08—Flow guidance means within the module or the apparatus
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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
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Abstract
The invention provides a spiral-wound membrane module, a composite filter element module and a water purification system, wherein the spiral-wound membrane module comprises: the filter membrane comprises a central tube (1), wherein the central tube (1) is made of a filter material capable of allowing fluid to pass through, and further comprises a roll-type membrane (2) wound around the periphery of the central tube (1), the roll-type membrane (2) can allow the fluid to pass through and filter the fluid, a raw water inlet (21) is formed in the roll-type membrane (2), and the raw water inlet (21) is formed in one end, along the axial direction of the central tube (1), of the roll-type membrane (2) and is close to the central tube (1) in the circumferential direction; one end of the roll-type membrane (2) along the axial direction of the central tube (1) is sealed at a position far away from the central tube (1) along the circumferential direction. The invention effectively reduces the circulation path of the pure water flow passage, shortens the pure water flow passage, reduces the flow resistance of the pure water, improves the water production efficiency of the reverse osmosis filter element and increases the flux.
Description
Technical Field
The invention belongs to the technical field of water purification, and particularly relates to a spiral-wound membrane module, a composite filter element assembly and a water purification system.
Background
The existing reverse osmosis filter element is usually formed by rolling a single-membrane leaf or a simple double-membrane leaf around a central pipe, and the water outlet flow passage is overlong. The prepared pure water has longer flowing distance in the reverse osmosis membrane, so that the resistance of the pure water flowing in the reverse osmosis membrane is larger, and the reverse osmosis filter element has lower water preparation efficiency and small flux. Moreover, the central tube of the existing reverse osmosis filter element is made of plastic or metal and is provided with a through hole, and the reverse osmosis membrane is directly rolled on the central tube, so that the integrated rolled reverse osmosis multistage composite filter element has larger volume and complex water path and structure.
In the composite filter element of the water purifier in the prior art, the flowing distance of pure water in the reverse osmosis membrane is long, so that the resistance of the pure water flowing in the reverse osmosis membrane is large, and the water production efficiency of the reverse osmosis filter element is low and the flux is small; the reverse osmosis membrane is directly rolled on the central tube, so that the integrated rolled reverse osmosis multistage composite filter element has the technical problems of large volume, complex water path and structure and the like, and the invention researches and designs a rolled membrane module, a composite filter element assembly and a water purification system.
Disclosure of Invention
Therefore, the invention aims to solve the technical problem of overcoming the defect that the composite filter element of the water purifier in the prior art has larger resistance to the flow of pure water in a reverse osmosis membrane due to longer flowing distance of the pure water in the reverse osmosis membrane, thereby providing a spiral-wound membrane module, a composite filter element assembly and a water purification system.
The present invention provides a wound membrane module comprising:
the filter comprises a central tube and a spiral membrane, wherein the central tube is made of a filter material capable of allowing fluid to pass through, the spiral membrane is wound around the periphery of the central tube and can allow the fluid to pass through and filter the fluid, a raw water inlet is formed in the spiral membrane and is formed in one end, in the axial direction of the central tube, of the spiral membrane and is close to the central tube in the circumferential direction; and one end of the roll-type membrane along the axial direction of the central tube is sealed at a position far away from the central tube along the circumferential direction.
Preferably, the first and second electrodes are formed of a metal,
the roll-type membrane is folded along the middle parting line of the long edge of the roll-type membrane in half, the edge formed by folding in half is a folded edge, the folded edge is connected to the outer wall of the central tube, one side of the roll-type membrane opposite to the folded edge is an opening edge, and the opening edge is a wastewater outlet allowing wastewater to be discharged; the other end of the spiral wound membrane in the axial direction of the central tube is sealed so that fluid cannot pass through.
Preferably, the first and second electrodes are formed of a metal,
one end of the central tube, which is axially opposite to the raw water inlet, is formed into a pure water outlet; and/or the central tube is of a hollow cylinder structure; and/or the filter material capable of allowing fluid to pass comprises: at least one of a carbon material, a polypropylene pp material and a ceramic material; and/or the roll-up membrane is a reverse osmosis membrane.
Preferably, the first and second electrodes are formed of a metal,
the central tube is of a cylindrical carbon rod structure consisting of the carbon material; or the central pipe is of a cylindrical PP structure made of the polypropylene PP material; or the central tube is of a cylindrical ceramic tube structure made of the ceramic material.
Preferably, the first and second electrodes are formed of a metal,
the roll-up membranes are at least two, and at least two of the roll-up membranes are connected to the outer wall of the central tube at circumferentially different positions.
Preferably, the first and second electrodes are formed of a metal,
the water purification device is characterized by further comprising a pure water diversion net, wherein the pure water diversion net is arranged between two adjacent roll-type membranes, one end of the pure water diversion net is connected to the outer wall of the central pipe, and the other end of the pure water diversion net is wound along the same winding direction as the roll-type membranes.
Preferably, the first and second electrodes are formed of a metal,
at least one pure water diversion net is arranged between two adjacent roll-type membranes; and/or the roll-type membrane and the pure water diversion net are uniformly arranged at intervals in the circumferential direction of the central pipe; and/or when the central pipe comprises a waste water outlet, the waste water outlets formed by at least two rolled membranes are uniformly distributed at intervals along the circumferential direction of the central pipe.
Preferably, the first and second electrodes are formed of a metal,
and a waste water diversion net is arranged in the rolled membrane formed by folding in half, and the waste water diversion net is wound along the same winding direction as the rolled membrane.
Preferably, the first and second electrodes are formed of a metal,
one end of the waste water diversion net along the axial direction of the central pipe is connected to the inner wall of the roll-type membrane, and/or the other end of the waste water diversion net along the axial direction of the central pipe is connected to the inner wall of the roll-type membrane; and/or at least one waste water diversion net is arranged inside one rolled membrane.
Preferably, the first and second electrodes are formed of a metal,
when simultaneously including pure water diversion net and waste water diversion net:
in a radial direction of the central tube: the length of the pure water diversion net after being unfolded is more than or equal to the length of the rolled membrane after being unfolded and is more than the length of the concentrated water diversion net; in the axial direction of the central tube: the length of the pure water diversion net after being unfolded is larger than the length of the concentrated water diversion net.
Preferably, the first and second electrodes are formed of a metal,
and after the roll-type membrane is wound, the raw water inlet is a full-circumference circular ring, and the diameter of the circular ring is less than one half of the diameter of the roll-type membrane component after the roll-type membrane is wound.
The invention also provides a composite filter element assembly comprising a wound membrane module according to any one of the preceding claims.
Preferably, the first and second electrodes are formed of a metal,
still including paper folding PP cotton, leading filtration carbon-point and ultrafiltration filter core, work as when the center tube is hollow tube structure, ultrafiltration filter core sets up the inside of center tube.
The invention also provides a water purification system comprising the spiral-wound membrane module or the composite filter element module.
The roll-type membrane module, the composite filter element assembly and the water purification system provided by the invention have the following beneficial effects:
1. according to the invention, the raw water inlet is arranged at one axial end of the spiral-wound membrane and close to the central tube, and the axial end of the spiral-wound membrane is sealed at a position far away from the central tube, so that the distance between the raw water inlet and the central tube is closer, the circulation path of the pure water flow channel is effectively reduced, the pure water flow channel is shortened, the resistance of pure water flow is reduced, the water production efficiency of the reverse osmosis filter element is improved, and the flux is increased; the roll-type membrane is folded along the middle dividing line of the long edge, the folding edge is connected to the outer wall of the central tube, and the opposite side edge of the folding edge forms a wastewater outlet for discharging wastewater, so that a concentrated water flow channel (namely a wastewater flow channel) can be effectively prolonged, the efficiency of filtering wastewater in the concentrated water flow channel is enhanced, the retention time of raw water in the flow channel is longer, the obtained filtering time is longer, the filtering ratio is improved, and water resources are saved;
2. the central tube is set to be a structure allowing fluid to pass (preferably a carbon rod), the reverse osmosis membrane is rolled on the central tube, and compared with the existing structure in which the central tube is arranged outside the carbon rod to wind the RO membrane, the structure of the central tube is effectively omitted, the volume of the rolled reverse osmosis composite filter element is reduced, and the space of the composite filter element is reduced; the carbon rod central tube is connected with the water filter core through the reverse osmosis membranes, so that a plurality of water filtering channels can be effectively increased, water production channels are increased, the water yield is improved, the pure water yield/raw water inflow is improved, and a side water inlet mode is adopted, so that a water path in the filter core is effectively simplified.
Drawings
FIG. 1 is a schematic view of a water path structure of a wound membrane module of the present invention when deployed;
fig. 2 is a schematic view of a water path structure when the winding of the wound membrane module of the present invention is completed;
fig. 3 is a schematic top view of the internal structure of fig. 2.
The reference numbers in the figures denote:
1. a central tube; 2. rolling the membrane; 21. a raw water inlet; 22. a wastewater outlet; 23. a pure water outlet; 3. a pure water diversion net; 4. a wastewater diversion net; 5. and (7) sealing the glue.
Detailed Description
As shown in fig. 1-3, the present invention provides a wound membrane module comprising:
the filter membrane comprises a central tube 1, wherein the central tube 1 is made of a filter material capable of allowing fluid to pass through, and further comprises a roll-type membrane 2 wound around the periphery of the central tube 1, the roll-type membrane 2 can allow the fluid to pass through and filter the fluid, a raw water inlet 21 is arranged on the roll-type membrane 2, and the raw water inlet 21 is arranged at one end of the roll-type membrane 2 along the axial direction of the central tube 1 and is close to the central tube 1 along the circumferential direction; one end of the roll membrane 2 in the axial direction of the central tube 1 is sealed at a position away from the central tube 1 in the circumferential direction (the close and the away are in an opposite relationship, and preferably sealed with a sealant 5).
According to the invention, the raw water inlet is arranged at one axial end of the spiral-wound membrane and close to the central tube, and the axial end of the spiral-wound membrane is sealed at a position far away from the central tube, so that the distance between the raw water inlet and the central tube is closer, the circulation path of the pure water flow channel is effectively reduced, the pure water flow channel is shortened, the resistance of pure water flow is reduced, the water production efficiency of the reverse osmosis filter element is improved, and the flux is increased; the central tube is arranged to be a structure (preferably a carbon rod) allowing fluid to pass through, the reverse osmosis membrane is rolled on the central tube, and compared with the existing structure in which the central tube is arranged outside the carbon rod to wind the RO membrane, the structure of the central tube is effectively omitted, the volume of the rolled reverse osmosis composite filter element is reduced, and the space of the composite filter element is reduced.
Preferably, the first and second electrodes are formed of a metal,
the roll-type membrane 2 is folded along the middle dividing line of the long edge of the roll-type membrane, the edge formed by folding is a folded edge, the folded edge is connected to the outer wall of the central tube 1, one side of the roll-type membrane 2 opposite to the folded edge is an open edge, and the open edge is a wastewater outlet 22 allowing wastewater to be discharged; the other end of the roll membrane 2 in the axial direction of the central tube is sealed so that fluid cannot pass through. The invention also folds the roll-type membrane along the middle dividing line of the long edge, the folding edge is connected to the outer wall of the central tube, and the opposite side edge of the folding edge forms a wastewater outlet for discharging wastewater, so that a concentrated water flow passage (namely a wastewater flow passage) can be effectively prolonged, the efficiency of filtering wastewater in the concentrated water flow passage is enhanced, the retention time of raw water in the flow passage is longer, the obtained filtering time is longer, the filtering ratio is improved, and water resources are saved.
Preferably, the first and second electrodes are formed of a metal,
a pure water outlet 23 is formed at one end of the central tube 1, which is axially opposite to the raw water inlet 21; and/or the central tube 1 is of a hollow cylinder structure; and/or the filter material capable of allowing fluid to pass comprises: at least one of a carbon material, a polypropylene pp material and a ceramic material; and/or the roll membrane 2 is a reverse osmosis membrane. According to the invention, the pure water outlet is arranged on the side opposite to the raw water inlet, so that the raw water is filtered by the reverse osmosis membrane and flows out from one axial side of the central tube through the central tube, the circulation path of the pure water is effectively reduced, the resistance of the pure water is reduced, and the water production efficiency of the reverse osmosis filter element is improved. The filter material is the preferred material of the filter material, can allow water to effectively pass through, can filter the water passing through the filter material, can form a primary filtering effect while realizing the supporting function of the central tube, overcomes the defect of volume increase caused by the increase of the number of filter element stages, reduces the volume and saves the cost.
Preferably, the first and second electrodes are formed of a metal,
the central tube 1 is of a cylindrical carbon rod structure made of the carbon material; or the central pipe 1 is in a cylindrical PP structure formed by the polypropylene PP material; or, the central tube 1 is a cylindrical ceramic tube structure made of the ceramic material. This is the preferred form of construction for the center tube of the present invention and is the preferred form of construction for the filter of the present invention, such as carbon rods, PP cylinders, and ceramic tubes.
The filter material capable of allowing fluid to pass through can comprise: carbon rods, cylindrical polypropylene pp material filter materials, ceramic tubes and the like are preferably used for improving the taste of carbon as the material of the central tube of the roll-type membrane element, so that the plastic central tube used by the existing roll-type membrane can be abandoned, the use of the plastic central tube of the existing roll-type membrane element is avoided, and one membrane element can have two-stage filtering functions; the carbonaceous central tube is utilized, so that the subsequent reuse of the taste filter element can be avoided, and the membrane element integrates two-stage filtering functions of a fine filtering filter element and a rear taste filter element; the carbonaceous central tube does not have macroscopic macropore, and its surface is covered with structural micropore, compares in the visual macroporous central tube of traditional working of plastics, and roll-type diaphragm produced water is collected more easily. The PP cylindrical central tube can effectively remove various particle impurities in the filtered liquid, has a multilayer depth structure, large pollutant carrying capacity, large filtering flow, small pressure difference, no chemical adhesive, higher sanitation, higher safety, acid resistance, alkali resistance, organic solution and oil resistance, good chemical stability and integration of surface, deep layer and coarse and fine filtering; has the characteristics of large flow, corrosion resistance, high pressure resistance, low cost and the like. Used for blocking large granular substances such as rust, silt, worm eggs and the like in water. The ceramic tube-shape center tube can filter, antibiotic and activation treatment drinking water, harmful removal chlorine residue and suspended pollutant, organic chemical substance, colour and peculiar smell, can filter out the drinking water that reaches certain drinking standard through using this filter core.
Preferably, the first and second electrodes are formed of a metal,
the number of the rolled membranes 2 is at least two, and at least two of the rolled membranes 2 are attached to the outer wall of the central tube 1 at circumferentially different positions. The roll-type membranes are preferably arranged in number and structure, and are connected to the carbon rod central tube through the structure of arranging a plurality of reverse osmosis membranes, so that a plurality of water filtering channels can be effectively increased, a water production channel is increased, the water yield is improved, the pure water yield/raw water inflow is improved, and a side water inflow mode is adopted, so that a water path in the filter element is effectively simplified.
Preferably, the first and second electrodes are formed of a metal,
the water purifying device further comprises a pure water diversion net 3, wherein the pure water diversion net 3 is arranged between two adjacent roll-type membranes 2, one end of the pure water diversion net 3 is connected to the outer wall of the central tube 1, and the other end of the pure water diversion net 3 is wound along the same winding direction as the roll-type membranes 2. Can carry out the drainage effect to the pure water through setting up pure water drainage net to play the effect of effectively separating to two adjacent reverse osmosis membranes (set up pure water drainage net mesh and can also prevent the inhomogeneous problem of roll system membrane inner pure water runner water pressure in roll system reverse osmosis membrane pure water runner).
Preferably, the first and second electrodes are formed of a metal,
at least one pure water diversion net 3 is arranged between two adjacent roll-type membranes 2; and/or the rolled membrane 2 and the pure water diversion net 3 are uniformly arranged at intervals in the circumferential direction of the central pipe 1; and/or, when the waste water outlet 22 is included, the waste water outlets 22 formed by at least two rolled membranes 2 are uniformly arranged at intervals along the circumferential direction of the central tube 1. The optimal number of the pure water diversion nets, the optimal arrangement mode between the spiral-wound membranes and the corresponding arrangement mode between the wastewater outlet and the spiral-wound membranes can enhance the effective effect of conducting the pure water diversion and diversion on the space between two adjacent spiral-wound membranes, and can play the roles of uniform diversion, filtration and diversion on water flow.
Preferably, the first and second electrodes are formed of a metal,
a waste water guide net 4 is arranged in the rolled membrane formed by folding, and the waste water guide net 4 is wound along the same winding direction as the rolled membrane 2. The spiral wound membrane module is a further preferable structural form, and can play a role in guiding and guiding wastewater (the purpose of arranging the wastewater guide net in the rolled reverse osmosis membrane concentrated water channel can also prevent the problem of uneven water pressure of the concentrated water channel in the rolled membrane).
Preferably, the first and second electrodes are formed of a metal,
one end of the waste water diversion net 4 along the axial direction of the central tube 1 is connected to the inner wall of the roll-type membrane 2, and/or the other end of the waste water diversion net 4 along the axial direction of the central tube 1 is connected to the inner wall of the roll-type membrane 2; and/or at least one waste water diversion net 4 is arranged inside one rolled membrane 2. This is the preferred form of construction of the waste water diversion net of the present invention, which enhances the effect of effective diversion of waste water.
Preferably, the first and second electrodes are formed of a metal,
when simultaneously including pure water diversion net and waste water diversion net:
in a radial direction of the central tube: the length of the pure water diversion net after being unfolded is more than or equal to the length of the rolled membrane after being unfolded and is more than the length of the concentrated water diversion net; in the axial direction of the central tube: the length of the pure water diversion net after being unfolded is larger than the length of the concentrated water diversion net. Through the relation, the film rolling mode can be uniformly and regularly arranged (the outer perimeter is larger than the inner perimeter), the dense water net is arranged between the two-fold RO, and the sealing part mainly comprises the upper edge and the lower edge, and the pure water diversion net and the two-fold RO are equal in length and can have a better sealing effect.
Preferably, the first and second electrodes are formed of a metal,
after the roll-type membrane 2 is wound, the raw water inlet 21 is a circular ring in the whole circumference, and the diameter of the circular ring is smaller than one half of the diameter of the roll-type membrane module after the roll-type membrane is wound. As shown in fig. 1, the longer the raw water inlet, the greater the water inflow, the greater the water pressure in the membrane will increase, which is likely to damage the reverse osmosis membrane, and the longer the transverse length of the first-used reverse osmosis membrane, the longer the pure water channel at the water inlet at the rightmost end is relatively, and the shorter the opposite concentrated water channel is, for example, the width of the raw water inlet is too long, even under the action of water pressure, part of water will directly flow away along the concentrated water channel without being subjected to reverse osmosis filtration, and the effect of increasing the pure water ratio is lost, and 1/2 is a critical value, and the pure water channel at the water inlet at the rightmost end is at least as long as the concentrated water channel. Can make can enough reduce the length of pure water runner, can also prevent that pressure is too big and damage reverse osmosis membrane's effect, can also prevent that the pure water runner is too short and can't form effectual filtering action.
The invention also provides a composite filter element assembly comprising a wound membrane module according to any one of the preceding claims. According to the invention, the raw water inlet is arranged at one axial end of the spiral-wound membrane and close to the central tube, and the axial end of the spiral-wound membrane is sealed at a position far away from the central tube, so that the distance between the raw water inlet and the central tube is closer, the circulation path of the pure water flow channel is effectively reduced, the pure water flow channel is shortened, the resistance of pure water flow is reduced, the water production efficiency of the reverse osmosis filter element is improved, and the flux is increased; the roll-type membrane is folded along the middle dividing line of the long edge, the folding edge is connected to the outer wall of the central tube, and the opposite side edge of the folding edge forms a wastewater outlet for discharging wastewater, so that a concentrated water flow channel (namely a wastewater flow channel) can be effectively prolonged, the efficiency of filtering wastewater in the concentrated water flow channel is enhanced, the retention time of raw water in the flow channel is longer, the obtained filtering time is longer, the filtering ratio is improved, and water resources are saved;
the central tube is set to be a structure allowing fluid to pass (preferably a carbon rod), the reverse osmosis membrane is rolled on the central tube, and compared with the existing structure in which the central tube is arranged outside the carbon rod to wind the RO membrane, the structure of the central tube is effectively omitted, the volume of the rolled reverse osmosis composite filter element is reduced, and the space of the composite filter element is reduced; the carbon rod central tube is connected with the water filter core through the reverse osmosis membranes, so that a plurality of water filtering channels can be effectively increased, water production channels are increased, the water yield is improved, the pure water yield/raw water inflow is improved, and a side water inlet mode is adopted, so that a water path in the filter core is effectively simplified.
Preferably, the first and second electrodes are formed of a metal,
still including paper folding PP cotton, leading filtration carbon-point and ultrafiltration filter core, work as when center tube 1 is hollow tube structure, ultrafiltration filter core sets up the inside of center tube 1. The composite filter element assembly is a preferable structural form, and can achieve the effect of multi-stage filtration.
The invention also provides a water purification system comprising the spiral-wound membrane module or the composite filter element module.
The RO membrane group (roll-type membrane) is formed by folding one or more reverse osmosis membranes in half, a layer of concentrated water guide net is clamped in the middle of the RO membrane group to form a concentrated water flow channel, a pure water guide net is arranged on one side surface of the RO membrane group, and a pure water flow channel is formed between the pure water guide net and the RO membrane group, wherein the roll-type mode is formed by fixing the roll-type RO membrane group on a carbon rod and spirally rolling the roll-type RO membrane group by taking the roll-type RO membrane as a starting point, and the roll-type RO membrane group can be formed by uniformly and fixedly rolling a plurality of same RO membrane groups at intervals. The raw water inlet is arranged on a pure water flow channel at the upper end of the rolled RO membrane group close to the carbon rod, and the concentrated water outlet is arranged on the side surface of the rolled RO membrane group. The whole RO membrane group filter element integrates the functions of reverse osmosis and post-carbon filtration, thereby reducing central tube components and reducing the volume of the composite filter element.
Raw water enters from a raw water inlet at the upper end of the rolled RO membrane group, and is filtered by the RO membrane, concentrated water flows out from the side surface of the rolled RO membrane group along a concentrated water flow channel, and pure water flows to the carbon rod along a pure water flow channel and flows out from the lower end of the carbon rod under the action of gravity after being filtered by the carbon rod. Simplify the water route runner, shorten the pure water runner, prolong the dense water runner, improve filtration efficiency, simultaneously, because system RO membrane group is rolled up and can be formed by the even fixed system of rolling up of a plurality of the same RO membrane groups, can form many pure water, dense water runner simultaneously, improves the product water flux.
The invention provides a multi-leaf reverse osmosis filter element formed by rolling a single-leaf reverse osmosis membrane or a plurality of leaves of reverse osmosis membranes after being folded, wherein a traditional central tube of the multi-leaf reverse osmosis filter element is cancelled, the multi-leaf reverse osmosis filter element is directly rolled on a post-positioned filtering carbon rod, and the reverse osmosis membrane (due to the existence of relatively independent multi-pure water flow channels) and a plurality of pure water flow guide nets of the multi-leaf reverse osmosis filter element are fixedly connected on the carbon rod, so that the service life of the multi-stage composite filter element is prolonged, and the filtering effect and the service life of.
Specifically, the traditional central tube made of materials such as metal or plastic is eliminated, and the reverse osmosis membrane module is directly rolled on a post-positioned filtering carbon rod. The multi-leaf reverse osmosis membrane is formed by folding a single-leaf reverse osmosis membrane or a multi-leaf reverse osmosis membrane in half, and the folded edges of the multi-leaf reverse osmosis membrane are fixedly connected to the rear filtering carbon rod; a concentrated water diversion net (namely a wastewater diversion net) is arranged in the middle of the folded multi-leaf reverse osmosis membrane; the pure water diversion net is two or more, and every pure water diversion net all fixed connection is on rearmounted filtration carbon-point.
Two or more pure water diversion nets are fixed on the post-positioned filtering carbon rod at even intervals, and at least one group of folding multi-leaf reverse osmosis membrane groups is arranged between every two pure water diversion nets; and the folded edges of all the folded multi-blade reverse osmosis membrane groups are fixed on the post-positioned filtering carbon rod; the pure water flow guide net and the outer side surface of the folded multi-leaf reverse osmosis membrane group form a pure water flow channel inside the filter element; the concentrated water guide net and the inner side surface of the folded multi-blade reverse osmosis membrane group form a concentrated water flow passage inside the filter element; each flow passage is isolated by bonding and sealing at the edge; wherein a section of non-sealing area is reserved at the position, close to the folded edge, of the folded multi-blade reverse osmosis membrane and is set as a raw water inlet; raw water flows into the water inlet filter element through the raw water inlet, flows into the pure water channel after being filtered by the multi-blade reverse osmosis membrane, flows into the post-filtration carbon rod along the pure water channel, flows out from the lower end of the carbon rod after being filtered by the carbon rod, and flows out from the concentrated water outlet on the side surface of the filter element along the concentrated water channel (due to a sealing mode, the filtered pure water can only flow to the central pipe under the action of water pressure, and the concentrated water is between the folded reverse osmosis membranes.
Wherein, the post-filter carbon rod can be solid or hollow;
furthermore, the folded multi-blade reverse osmosis membrane group and the pure water diversion net are uniformly fixed on the rear carbon rod at intervals; the formed concentrated water outlets are uniformly distributed on the side surface of the filter element at intervals;
furthermore, only one folded multi-blade reverse osmosis membrane group is arranged between every two pure water diversion nets, and only one concentrated water diversion net is arranged in the middle of the folded reverse osmosis membrane group;
furthermore, the formed raw water inlet is a full-circumference circular ring, and the diameter of the circular ring is less than one half of the diameter of the whole filter element;
furthermore, the folded reverse osmosis membrane group is formed by folding a single-leaf reverse osmosis membrane in half;
further, in the lateral direction with respect to the central carbon rod: the length of the pure water diversion net is more than or equal to the length of the reverse osmosis membrane group which is folded in half and is more than the length of the concentrated water diversion net; in the longitudinal direction relative to the central carbon rod: the length of the pure water diversion net is equal to the length of the reverse osmosis membrane group which is folded in half and is larger than the length of the concentrated water diversion net.
Furthermore, the post-filter carbon rod is of a hollow tubular structure.
Further this composite filter still includes that paper folding PP is cotton, leading filtration carbon-point, ultrafiltration, wherein ultrafiltration structure sets up in the middle of the post-positioned filtration carbon-point.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (14)
1. A spiral wound membrane module, characterized in that: the method comprises the following steps:
the filter membrane comprises a central tube (1), wherein the central tube (1) is made of a filter material capable of allowing fluid to pass through, and further comprises a roll-type membrane (2) wound around the periphery of the central tube (1), the roll-type membrane (2) can allow the fluid to pass through and filter the fluid, a raw water inlet (21) is formed in the roll-type membrane (2), and the raw water inlet (21) is formed in one end, along the axial direction of the central tube (1), of the roll-type membrane (2) and is close to the central tube (1) in the circumferential direction; one end of the roll-type membrane (2) along the axial direction of the central tube (1) is sealed at a position far away from the central tube (1) along the circumferential direction.
2. The membrane module of claim 1, wherein:
the roll-type membrane (2) is folded along the middle dividing line of the long edge of the roll-type membrane in half, the edge formed by folding in half is a folded edge, the folded edge is connected to the outer wall of the central tube (1), one side of the roll-type membrane (2) opposite to the folded edge is an open edge, and the open edge is a wastewater outlet (22) allowing wastewater to be discharged; the other end of the roll membrane (2) along the axial direction of the central tube is sealed, so that fluid cannot pass through.
3. The membrane module of claim 1 or 2, wherein:
one end of the central tube (1), which is axially opposite to the raw water inlet (21), is formed into a pure water outlet (23); and/or the central tube (1) is of a hollow cylinder structure; and/or the filter material capable of allowing fluid to pass comprises: at least one of a carbon material, a polypropylene pp material and a ceramic material; and/or the roll-type membrane (2) is a reverse osmosis membrane.
4. The membrane module of claim 3, wherein:
the central tube (1) is of a cylindrical carbon rod structure consisting of the carbon material; or the central pipe (1) is of a cylindrical PP structure made of the polypropylene PP material; or the central tube (1) is a cylindrical ceramic tube structure made of the ceramic material.
5. The rolled membrane module according to any one of claims 1-4, characterized in that:
the number of the rolled membranes (2) is at least two, and at least two of the rolled membranes (2) are connected to the outer wall of the central tube (1) at circumferentially different positions.
6. The rolled membrane module according to claim 5, characterized in that:
the water purifying device is characterized by further comprising a pure water diversion net (3), wherein the pure water diversion net (3) is arranged between two adjacent roll-type membranes (2), one end of the pure water diversion net (3) is connected to the outer wall of the central pipe (1), and the other end of the pure water diversion net is wound along the same winding direction as the roll-type membranes (2).
7. The rolled membrane module according to claim 6, characterized in that:
at least one pure water diversion net (3) is arranged between two adjacent roll-type membranes (2); and/or the roll-type membrane (2) and the pure water diversion net (3) are arranged at even intervals in the circumferential direction of the central pipe (1); and/or when the waste water outlet (22) is included, the waste water outlets (22) formed by at least two rolled membranes (2) are uniformly arranged at intervals along the circumferential direction of the central pipe (1).
8. The rolled membrane module according to any one of claims 2-7, characterized in that:
a waste water diversion net (4) is arranged in the rolled membrane formed by folding in half, and the waste water diversion net (4) is wound along the same winding direction as the rolled membrane (2).
9. The membrane module of claim 8, wherein:
one end of the waste water diversion net (4) along the axial direction of the central pipe (1) is connected to the inner wall of the roll-type membrane (2), and/or the other end of the waste water diversion net (4) along the axial direction of the central pipe (1) is connected to the inner wall of the roll-type membrane (2); and/or at least one waste water diversion net (4) arranged inside one rolled membrane (2).
10. The membrane module of claim 8, wherein:
when simultaneously including pure water diversion net and waste water diversion net:
in a radial direction of the central tube: the length of the pure water diversion net after being unfolded is more than or equal to the length of the rolled membrane after being unfolded and is more than the length of the concentrated water diversion net; in the axial direction of the central tube: the length of the pure water diversion net after being unfolded is larger than the length of the concentrated water diversion net.
11. The rolled membrane module according to any one of claims 1-10, characterized in that:
after the roll-type membrane (2) is wound, the raw water inlet (21) is a full-circumference circular ring, and the diameter of the circular ring is smaller than one half of the diameter of the roll-type membrane module after the roll-type membrane is wound.
12. A composite filter element assembly, comprising: comprising a rolled membrane module according to any one of claims 1-11.
13. The composite filter element assembly of claim 12, wherein:
still including paper folding PP cotton, leading filtration carbon-point and ultrafiltration filter core, work as when center tube (1) is hollow tube structure, ultrafiltration filter core sets up the inside of center tube (1).
14. A water purification system, its characterized in that: comprising a wound membrane module according to any one of claims 1-11 or a composite filter element module according to any one of claims 12-13.
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| CN202020191911.8U Active CN211886284U (en) | 2019-08-02 | 2020-02-19 | Purifier filter core center tube, spiral wound membrane module and compound filter core subassembly |
| CN202020186747.1U Active CN212091724U (en) | 2019-08-02 | 2020-02-19 | Water purification unit with filter element group spare |
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| CN202010103163.8A Pending CN111229055A (en) | 2019-08-02 | 2020-02-19 | Compound filter element group spare and water purification system |
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| CN202010103369.0A Pending CN111229057A (en) | 2019-08-02 | 2020-02-19 | Compound filter element group spare and water purification system |
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| CN202010103364.8A Pending CN111185099A (en) | 2019-08-02 | 2020-02-19 | Compound filter element group spare and water purification system |
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| CN202010103184.XA Pending CN111185096A (en) | 2019-08-02 | 2020-02-19 | Compound filter element group spare and water purification system |
| CN202020186724.0U Active CN211886280U (en) | 2019-08-02 | 2020-02-19 | Compound filter element group spare and water purification system |
| CN202010105797.7A Pending CN111318175A (en) | 2019-08-02 | 2020-02-19 | Spiral wound membrane module and water purification system |
| CN202010105864.5A Pending CN111185102A (en) | 2019-08-02 | 2020-02-19 | Spiral wound membrane module and water purification system |
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| KR20230095469A (en) | 2021-12-22 | 2023-06-29 | 코웨이 주식회사 | Filter member and filter structure include the same |
| WO2023246738A1 (en) * | 2022-06-21 | 2023-12-28 | 杭州苏博瑞驰科技有限公司 | End surface confluence-type filter element assembly and filter element |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112159239A (en) * | 2020-09-28 | 2021-01-01 | 景德镇陶瓷大学 | Preparation method of roll type ceramic membrane support and ceramic membrane product thereof |
| CN112159239B (en) * | 2020-09-28 | 2022-07-15 | 景德镇陶瓷大学 | Preparation method of roll-type ceramic membrane support and ceramic membrane product thereof |
| KR20230095469A (en) | 2021-12-22 | 2023-06-29 | 코웨이 주식회사 | Filter member and filter structure include the same |
| WO2023246738A1 (en) * | 2022-06-21 | 2023-12-28 | 杭州苏博瑞驰科技有限公司 | End surface confluence-type filter element assembly and filter element |
Also Published As
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| CN211886284U (en) | 2020-11-10 |
| CN212091724U (en) | 2020-12-08 |
| CN211886279U (en) | 2020-11-10 |
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| CN111185100A (en) | 2020-05-22 |
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| CN111229055A (en) | 2020-06-05 |
| CN111229054A (en) | 2020-06-05 |
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