CN214880427U - Membrane stack for water purification unit and water purification unit - Google Patents
Membrane stack for water purification unit and water purification unit Download PDFInfo
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- CN214880427U CN214880427U CN202022986278.4U CN202022986278U CN214880427U CN 214880427 U CN214880427 U CN 214880427U CN 202022986278 U CN202022986278 U CN 202022986278U CN 214880427 U CN214880427 U CN 214880427U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 245
- 239000012528 membrane Substances 0.000 title claims abstract description 190
- 238000000746 purification Methods 0.000 title claims abstract description 34
- 239000013505 freshwater Substances 0.000 claims abstract description 76
- 239000003011 anion exchange membrane Substances 0.000 claims description 31
- 238000005341 cation exchange Methods 0.000 claims description 29
- 239000012141 concentrate Substances 0.000 claims description 13
- 238000000909 electrodialysis Methods 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 10
- 230000005012 migration Effects 0.000 abstract description 9
- 238000013508 migration Methods 0.000 abstract description 9
- 238000000926 separation method Methods 0.000 abstract description 9
- 238000012546 transfer Methods 0.000 abstract description 8
- 239000012530 fluid Substances 0.000 description 14
- 150000002500 ions Chemical class 0.000 description 11
- 239000003014 ion exchange membrane Substances 0.000 description 10
- 230000003204 osmotic effect Effects 0.000 description 9
- 238000007789 sealing Methods 0.000 description 6
- 238000010612 desalination reaction Methods 0.000 description 5
- 230000005684 electric field Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011045 prefiltration Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003010 cation ion exchange membrane Substances 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Abstract
The utility model discloses a membrane stack and water purification unit for water purification unit, the membrane stack has first water inlet, second water inlet, fresh water export and dense water export, first water inlet with fresh water export intercommunication and injecing has the fresh water passageway, the second water inlet with dense water export intercommunication and injecing has the dense water passageway, wherein, first water inlet with dense water export is located the first side of membrane stack, the second water inlet with fresh water export is located the membrane stack with the second side that first side is relative. According to the utility model discloses a membrane stack for water purification unit sets up in the both sides that the membrane stack is relative through first water inlet and second water inlet for the water inlet mode of membrane stack forms into to intake in opposite directions, for the syntropy intake, can guarantee ion migration efficiency, promotes the mass transfer effect of membrane stack, and membrane stack separation efficiency is good, has improved fresh water play water quality of water simultaneously.
Description
Technical Field
The utility model relates to a water purification unit technical field particularly, relates to a membrane stack and water purification unit for water purification unit.
Background
In the related art, the water purifying device adopts the electrodialysis technology to filter water quality, for example, the noise is low, the waste water is less, the core does not need to be frequently replaced, the water quality is diversified, however, the devices usually feed water from one side and discharge water from the other side, the water paths with different water qualities in the membrane stack have the same flow direction, and in the working process of the device, along with the migration of ions and the flow of water, the osmotic pressure difference of the rear section is larger and larger, so that the electromigration rate of the rear section ions is slower and slower, the separation efficiency is gradually reduced, and an improved space exists.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model discloses an aim at provides a membrane stack for water purification unit, membrane stack separation efficiency is good.
The utility model discloses still provide a water purification unit.
According to the utility model discloses a membrane stack for water purification unit of first aspect embodiment, the membrane stack has first water inlet, second water inlet, fresh water export and dense water export, first water inlet with fresh water exports the intercommunication and is limited the fresh water passageway, the second water inlet with dense water exports the intercommunication and is limited the dense water passageway, wherein, first water inlet with dense water exports and is located the first side of membrane stack, the second water inlet with fresh water exports and is located the membrane stack with the second side that first side is relative.
According to the utility model discloses a membrane stack for water purification unit sets up in the both sides that the membrane stack is relative through first water inlet and second water inlet for the water inlet mode of membrane stack forms into to intake in opposite directions, for the syntropy intake, can guarantee ion migration efficiency, promotes the mass transfer effect of membrane stack, and membrane stack separation efficiency is good, has improved fresh water play water quality of water simultaneously.
According to the utility model discloses a membrane stack for water purification unit, the membrane stack includes: the membrane group comprises a cation exchange membrane and an anion exchange membrane which are oppositely arranged; the electrode group comprises a negative electrode plate and a positive electrode plate, the positive electrode plate is arranged on one side of the membrane group, and the negative electrode plate is arranged on the other side of the membrane group; the pressing plate assembly comprises a first pressing plate and a second pressing plate which are oppositely arranged, the first pressing plate is in pressed connection with the negative electrode plate, the second pressing plate is in pressed connection with the positive electrode plate, the first pressing plate is provided with the first water inlet and the concentrated water outlet, and the second pressing plate is provided with the second water inlet and the fresh water outlet.
According to the utility model discloses a membrane stack for water purification unit, first water inlet with dense water outlet is located the upside of first clamp plate, the second water inlet with fresh water outlet is located the downside of second clamp plate.
In some examples, the membrane stack forms a square, the first water inlet and the concentrate outlet are located at one end of a diagonal of the membrane stack, and the second water inlet and the fresh water outlet are located at the other end of the diagonal.
In some examples, further comprising: the insulating separator, first clamp plate with be equipped with between the negative electrode plate insulating separator, just the second clamp plate with be equipped with between the positive electrode plate insulating separator, wherein, insulating separator be equipped with the water hole is crossed to the first baffle of fresh water passageway intercommunication and with the water hole is crossed to the second baffle of dense water passageway intercommunication.
In some examples, further comprising: the flow guide plates comprise a plurality of flow guide plates, the flow guide plates are arranged between the electrode group and the membrane group, the flow guide plates are arranged between the cation exchange membrane and the anion exchange membrane, and the flow guide plates are provided with first flow guide channels communicated with the fresh water channels or second flow guide channels communicated with the concentrated water channels.
In some examples, the baffle includes: a first baffle disposed adjacent to the cation exchange membrane and between the negative electrode plate and the cation exchange membrane; a second flow guide plate disposed between the cation exchange membrane and the anion exchange membrane; the positive electrode plate is close to the anion exchange membrane and is arranged between the anion exchange membrane and the positive electrode plate, the first guide plate is provided with the second guide channel, the third guide plate is provided with the second guide channel, and the second guide plate is provided with the first guide channel or the second guide channel.
In some examples, the membrane group includes a plurality of groups, and the second baffle includes a plurality of baffles, and a plurality of the second baffles correspond to the membrane group one to one.
According to the utility model discloses a membrane stack for water purification unit, the membrane stack is the electrodialysis membrane stack.
According to the utility model discloses water purification unit of second aspect embodiment, include according to the utility model discloses a membrane heap for water purification unit of first aspect embodiment through adopting above-mentioned membrane heap, has promoted the mass transfer effect, and separation efficiency is good, and fresh water goes out water quality of water and improves.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a membrane stack according to an embodiment of the present invention;
fig. 2 is an exploded view of a membrane stack according to an embodiment of the invention;
figure 3 is a schematic diagram of the water inlet to a membrane stack according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a water purifying device according to an embodiment of the present invention.
Reference numerals:
the water purifying apparatus 1000 is provided with a water purifying device,
a membrane stack 100, a first water inlet 101, a fresh water outlet 102, a concentrated water outlet 103, a second water inlet 104, a fresh water channel 105, a concentrated water channel 106,
a membrane group 10, a cation exchange membrane 11, an anion exchange membrane 12,
the electrode group 20, the positive electrode plate 21, the negative electrode plate 22,
a first guide passage 301, a second guide passage 302, a first baffle 31, a second baffle 32, a third baffle 33,
a platen assembly 40, a first platen 41, a second platen 42,
an insulating partition 50, a first partition water passing hole 51, a second partition water passing hole 52,
a front filter element 200 and a rear filter element 300.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A membrane stack 100 for a water purification apparatus 1000 according to an embodiment of the present invention will be described with reference to fig. 1 to 4.
As shown in fig. 1-4, according to the membrane stack 100 for the water purifying apparatus 1000 of an embodiment of the present invention, the membrane stack 100 has a first water inlet 101, a second water inlet 104, a fresh water outlet 102 and a concentrated water outlet 103, the first water inlet 101 is communicated with the fresh water outlet 102, a fresh water channel 105 is defined between the first water inlet 101 and the fresh water outlet 102 to realize the output of fresh water, the second water inlet 104 is communicated with the concentrated water outlet 103, a concentrated water channel 106 is defined between the second water inlet 104 and the concentrated water outlet 103 to realize the output of concentrated water, the first water inlet 101 and the second water inlet 104 are communicated with raw water, the raw water can be tap water or water filtered by a pre-filter element, the raw water is simultaneously delivered to the membrane stack 100 by providing two water inlets, which not only can meet the requirement of the water inlet amount of the membrane stack 100, but also can realize the output of different water qualities, different use requirements of the user are met, and the use experience of the user is improved.
The first water inlet 101 and the concentrated water outlet 103 are located on a first side (front side as shown in fig. 2) of the membrane stack 100, the second water inlet 104 and the fresh water outlet 102 are located on a second side (rear side as shown in fig. 2) of the membrane stack 100, the second side is opposite to the first side, of course, the first water inlet 101 and the concentrated water outlet 103 may also be located on the rear side of the membrane stack 100, the second water inlet 104 and the fresh water outlet 102 are located on the front side of the membrane stack 100, that is, the first water inlet 101 and the second water inlet 104 are located on two sides of the membrane stack 100, and the fresh water outlet 102 and the concentrated water outlet 103 are also located on two sides of the membrane stack 100, so that the flow direction of the fresh water in the fresh water channel 105 is opposite to the flow direction of the concentrated water in the concentrated water channel 106.
If the first water inlet 101 and the second water inlet 104 are located on the same side of the membrane stack 100, the flow direction of the fresh water in the fresh water channel 105 is the same as the flow direction of the concentrated water in the concentrated water channel 106, the fresh water, the concentrated water and the polar water (the polar water refers to the water flowing out from the electrode chamber in contact with the electrode group 20) flow out from the other side in the same direction, the osmotic pressure of the concentrated water and the osmotic pressure of the fresh water at the water inlets are the same, the migration of ions in the water is only affected by the electric field force, the concentration of the fresh water is the lowest at the position adjacent to the outlet, and the concentration of the concentrated water is the highest at the same time, at this time, the osmotic pressure difference between the concentrated water and the fresh water is the largest, the mass transfer speed is the lowest, and even the electric field force and the osmotic pressure are balanced, so that the whole membrane stack 100 has no ion migration, and the separation efficiency of the membrane stack 100 is reduced.
In the embodiment, the flow direction of the fresh water in the fresh water channel 105 is opposite to the flow direction of the concentrated water in the concentrated water channel 106, so that the osmotic pressure near the water inlet of the fresh water channel 105 is the osmotic pressure difference between the raw water and the concentrated water, and the osmotic pressure near the water outlet of the fresh water channel 105 is the osmotic pressure difference between the fresh water and the raw water, so that the mass transfer speed of the membrane stack 100 can be maintained at a higher point, the ion transfer efficiency is ensured, the separation efficiency of the membrane stack 100 is improved, and the quality of the fresh water outlet water can be improved.
According to the utility model discloses a membrane stack 100 for water purification unit 1000 sets up in membrane stack 100 relative both sides through first water inlet 101 and second water inlet 104 for membrane stack 100's the mode of intaking forms to intaking in opposite directions, for the syntropy intaking, can guarantee ion migration efficiency, promotes membrane stack 100's mass transfer effect, and membrane stack 100 separation efficiency is good, has improved fresh water play water quality of water simultaneously.
According to the utility model discloses an embodiment, membrane stack 100 is electrodialysis membrane stack 100, and membrane stack 100 adopts the electrodialysis method, under the effect of additional direct current electric field, utilizes ion exchange membrane to the selective permeability of ion in the fluid, makes anion, cation take place the ion migration in the fluid, reaches the purpose of desalination or concentration through anion exchange membrane 12, cation exchange membrane 11 respectively to can provide the quality of water of different concentrations for the user, satisfy user's user demand.
As shown in fig. 1 and 2, according to an embodiment of the present invention, a membrane stack 100 includes: the membrane module 10 comprises a cation exchange membrane 11 and an anion exchange membrane 12, the cation exchange membrane 11 and the anion exchange membrane 12 are arranged oppositely, the electrode module 20 comprises a negative electrode plate 22 and a positive electrode plate 21, the positive electrode plate 21 is arranged on one side of the membrane module 10, the negative electrode plate 22 is arranged on the other side of the membrane module 10, that is, the membrane module 10 is arranged between the positive electrode plate 21 and the negative electrode plate 22, wherein the positive electrode plate 21 can be arranged oppositely to the anion exchange membrane 12, and the negative electrode plate 22 can be arranged oppositely to the cation exchange membrane 11.
The pressing plate assembly 40 comprises a first pressing plate 41 and a second pressing plate 42 which are oppositely arranged, the first pressing plate 41 is pressed on the negative electrode plate 22, the second pressing plate 42 is pressed on the positive electrode plate 21, wherein the first pressing plate 41 is provided with a first water inlet 101 and a concentrated water outlet 103, and the second pressing plate 42 is provided with a second water inlet 104 and a fresh water outlet 102.
In some examples, the membrane stack 100 includes one or more membrane groups 10, each membrane group 10 includes cation exchange membranes 11 and anion exchange membranes 12 which are oppositely arranged and have opposite polarities, and the cation exchange membranes 11 and the anion exchange membranes are alternately arranged, for example, the membrane stack 100 has two membrane groups 10, and the ion exchange membranes can be arranged in a positive-negative-positive-negative manner.
As shown in fig. 3, in some specific examples, the membrane stack 100 has a plurality of membrane modules 10, and the membrane modules 10 are arranged in series, that is, after the water flows into the membrane stack 100, the water passes through the plurality of membrane modules 10 for electrodialysis repeatedly, thereby further improving the purifying effect of the membrane stack 100.
As shown in fig. 1 and 2, the first water inlet 101 and the concentrated water outlet 103 are provided at the upper side of the first pressing plate 41, and the second water inlet 104 and the fresh water outlet 102 are provided at the lower side of the second pressing plate 42, whereby the fluid entering the membrane stack 100 can flow from the top down or from the bottom up, sufficient electrodialysis is achieved, and thus the purification effect can be improved.
In some examples, the membrane stack 100 forms a square, the first water inlet 101 and the second water inlet 104 are respectively located at two ends of a diagonal line of the membrane stack 100, that is, the first pressure plate 41 and the second pressure plate 42 correspondingly form a square, and the two pressure plates are the same in size, the first water inlet 101 is located at the upper left corner of the first pressure plate 41, the concentrated water outlet 103 is also located at the upper left corner of the first pressure plate 41, the second water inlet 104 is located at the lower right corner of the second pressure plate 42, and the fresh water outlet 102 is also located at the lower right corner of the second pressure plate 42; or, the first water inlet 101 is located at the upper right corner of the first pressing plate 41, the concentrated water outlet 103 is also located at the upper right corner of the first pressing plate 41, the second water inlet 104 is located at the lower left corner of the second pressing plate 42, and the fresh water outlet 102 is also located at the lower left corner of the second pressing plate 42, so that the fluid entering the membrane stack 100 can flow in the diagonal direction, on one hand, interference of the fluid flowing from the first water inlet 101 and the second water inlet 104 can be avoided, on the other hand, the fluid entering the membrane stack 100 can flow in the diagonal direction, further improving the sufficiency of electrodialysis, improving the quality of the outlet water, and achieving a better purification effect.
As shown in fig. 1 and 2, in some examples, the membrane stack 100 further includes: an insulating separator 50, wherein the insulating separator 50 is arranged between the first pressing plate 41 and the negative electrode plate 22, and the insulating separator 50 is arranged between the second pressing plate 42 and the positive electrode plate 21, wherein the insulating separator 50 is provided with a first separator water through hole 51 and a second separator water through hole 52, and the first separator water through hole 51 is communicated with the fresh water channel 105, so that fluid can flow out from the fresh water outlet 102 through the first separator water through hole 51 and the fresh water channel 105; the second separator water passing hole 52 communicates with the concentrate passage 106 so that the fluid can flow out from the concentrate outlet 103 through the second separator water passing hole 52, the concentrate passage 106.
As shown in fig. 2, in some examples, the membrane stack 100 further comprises: the guide plate, the guide plate includes a plurality ofly, be equipped with partial guide plate between electrode group 20 and the membrane group 10, also be equipped with the guide plate between cation exchange membrane 11 and the anion exchange membrane 12, the guide plate can play water conservancy diversion and drainage effect, can play the supporting role to ion exchange membrane simultaneously, the hardness of guide plate is greater than ion exchange membrane's hardness promptly, ion exchange membrane presss from both sides and establishes between two guide plates, the difficult deformation that appears to can carry out the electrodialysis steadily for a long time, improve membrane stack 100's life.
It is understood that the membrane module 10, the electrode module 20, the flow guide plate and the pressure plate module 40 together form a stacked sealing structure, and other sealing structures are further disposed at the periphery of the stacked sealing structure to prevent external dust or microorganisms from entering the membrane stack 100, improve the sanitary condition of purified water, and prevent fluid in the membrane stack 100 from leaking to the outside. The membrane group 10, the electrode group 20 and the guide plate can be coated with a sealant in the circumferential direction, and the sealant is usually made of a non-toxic food-grade material which is not easy to age.
In some specific embodiments, the guide plate has high surfaces and low surfaces which are arranged in a staggered manner, the high surfaces are attached to the cation exchange membrane 11 or the anion exchange membrane 12, and the low surfaces form a flow guide channel, so that the guide plate has the flow guide channel, and water flows freely shuttle between the ion exchange membrane and the guide plate, thereby ensuring stable and smooth flow of the water flows.
The diversion channel can be a first diversion channel 301 communicated with the fresh water channel 105, and the diversion channel can also be a second diversion channel 302 communicated with the concentrated water channel 106, wherein, it needs to be explained that each diversion plate is only provided with one diversion channel, namely, the diversion plate is only provided with the first diversion channel 301, so that the diversion plate only realizes diversion and diversion of fresh water; or the guide plate is only provided with the second guide channel 302, so that the guide plate only realizes the guide and the diversion of the concentrated water.
In addition, the high surface of the guide plate can play a role in supporting the ion exchange membrane, so that the ion exchange membrane is prevented from deforming; the circumferential direction of the guide plate forms a sealing surface which is attached to the cation exchange membrane 11, the anion exchange membrane 12, the positive electrode plate 21 and the negative electrode plate 22; and water sealing walls are formed among the sealing surfaces of the guide plates, the cation ion exchange membrane, the anion exchange membrane 12, the positive electrode plate 21, the negative electrode plate 22 and the insulating separator 50, so that the fluid can be prevented from diffusing to the circumferential direction of the membrane stack 100.
In some examples, the negative electrode plate 22 is disposed adjacent to the cation exchange membrane 11, the positive electrode plate 21 is disposed adjacent to the anion exchange membrane 12, the baffles include a first baffle 31, a second baffle 32, and a third baffle 33, the first baffle 31 is disposed between the negative electrode plate 22 and the cation exchange membrane 11, the second baffle 32 is disposed between the cation exchange membrane 11 and the anion exchange membrane, the third baffle 33 is disposed between the anion exchange membrane 12 and the positive electrode plate 21, and a fluid can pass through the first baffle 31, the second baffle 32, the third baffle 33, the cation exchange membrane 11, and the anion exchange membrane 12, under the action of an external direct current electric field, cations migrate to the cathode and pass through the cation exchange membrane 11 and the first baffle 31 in sequence; the anions migrate to the anode and pass through the anion exchange membrane 12 and the third guide plate 33 in sequence, so that a concentrated water chamber and a fresh water chamber are approximately formed in the membrane stack 100, the concentrated water chamber conveys concentrated water outwards, and the fresh water chamber conveys fresh water outwards.
In some specific examples, the first diversion plate 31 is provided with a second diversion channel 302 communicated with the concentrate channel 106, and the third diversion plate 33 is also provided with a second diversion channel 302 communicated with the concentrate channel 106, so that the fluid can flow out from the concentrate outlet 103 through the second diversion channel 302 and the concentrate channel 106.
In some examples, the membrane stack 100 has a plurality of membrane groups 10, correspondingly, the second diversion plate 32 includes a plurality of second diversion plates 32, the plurality of second diversion plates 32 correspond to the membrane groups 10 one by one, and the second diversion plate 32 may be provided with a first diversion channel 301 communicated with the fresh water channel 105, so that the fluid can flow out from the fresh water outlet 102 through the second diversion channel 302 and the concentrated water channel 106; or the second diversion channel 302 communicated with the concentrated water channel 106 is arranged on the second diversion plate 32, so that the fluid can flow out from the concentrated water outlet 103 through the second diversion channel 302 and the concentrated water channel 106.
A specific embodiment according to the present invention is described below with reference to fig. 2.
The membrane stack 100 according to an embodiment of the present invention includes: the membrane stack comprises a membrane group 10, an electrode group 20, a pressure plate assembly 40, an insulating separator 50 and a flow guide plate, wherein only one membrane group 10 is arranged in the membrane stack 100, the membrane group 10 comprises a cation exchange membrane 11 and an anion exchange membrane 12, the electrode group 20 comprises a negative electrode plate 22 and a positive electrode plate 21, the pressure plate assembly 40 comprises a first pressure plate 41 and a second pressure plate 42 which are oppositely arranged, and the flow guide plate comprises a first flow guide plate 31, a second flow guide plate 32 and a third flow guide plate 33. Specifically, the membrane stack 100 is sequentially provided with a first pressing plate 41, an insulating separator 50, a negative electrode plate 22, a first guide plate 31, a cation exchange membrane 11, a second guide plate 32, an anion exchange membrane 12, a third guide plate 33, a positive electrode plate 21, an insulating separator 50 and a second pressing plate 42 from front to back, the first guide plate 31 and the third guide plate 33 are provided with a second guide channel 302, the second guide plate 32 is provided with a first guide channel 301, the insulating separator 50 is provided with a first separator water through hole 51 and a second separator water through hole 52, the negative electrode plate 22 and the positive electrode plate 21 are provided with water through holes, the membrane stack 100 can be pressed and fixed through a fastener, wherein water can only flow through the water through holes and the guide flow channels inside the membrane stack 100.
When the membrane stack 100 is in operation, water in the first water inlet 101 enters the membrane stack 100 from the front to the back in fig. 2, the water flows to the negative electrode plate 22 through the first separator water holes 51 on the upper side of the insulating separator 50, flows to the first flow guide plate 31 and the cation exchange membrane 11 from the upper side of the negative electrode plate 22 to the second flow guide plate 32, because the upper side of the positive electrode plate 21 has no water holes, the water cannot flow through the anion exchange membrane 12 and the third flow guide plate 33, and flows downward to the bottom of the second flow guide plate 32 through the second flow guide channel 302 on the second flow guide plate 32, and then passes through the anion exchange membrane 12, the third flow guide plate 33, the positive electrode plate 21, the insulating separator 50 and the second pressure plate 42 in sequence, and due to the migration of ions, the water is purified into fresh water, so that the fresh water flows out through the fresh water outlet 102.
The water from the second water inlet 104 enters the membrane stack 100 from the back to the front in fig. 2, the water flows to the positive electrode plate 21 through the second separator water through hole 52 on the lower side of the insulating separator 50, flows to the third flow guide plate 33, the anion exchange membrane 12, the second flow guide plate 32, the cation exchange membrane 11 and the first flow guide plate 31 from the lower side of the positive electrode plate 21, and flows upward along the second flow guide channel 302 on the first flow guide plate 31 and the second flow guide channel 302 on the third flow guide plate 33 because the second flow guide plate 32 has no flow guide channel communicated with the second flow guide plate 32, and then sequentially passes through the negative electrode plate 22, the insulating separator 50 and the first pressure plate 41, and the water forms concentrated water due to the migration of ions, so that the concentrated water flows out through the concentrated water outlet 103.
The following is a detailed analytical description by two sets of experiments.
Experiment one: the membrane stack 100 includes 27 membrane groups 10, namely, the membrane stack 100 includes 27 pairs of ion exchange membranes, it is 750mL/min to go out fresh water flow control, dense water flow is 250mL/min, the running water TDS is 109mg/L, membrane stack 100 voltage sets up to 30V, in this example, when membrane stack 100 moves, membrane stack 100 desalination can reach 78%, if set up first water inlet 101 and second water inlet 104 in the same one side of membrane stack 100, the flow direction of fresh water in fresh water passageway 105 is the same with the flow direction of dense water in dense water passageway 106, membrane stack 100 desalination can only reach 71%, so can see, according to the utility model discloses membrane stack 100 of the embodiment, can improve operating efficiency, improved out water quality.
Experiment two: the membrane stack 100 includes 32 membrane groups 10, the membrane stack 100 includes 32 pairs of ion exchange membranes promptly, other conditions are the same with the experiment one, in this example, when the membrane stack 100 moves, membrane stack 100 desalination can reach 83%, if set up first water inlet 101 and second water inlet 104 in the same one side of membrane stack 100, the flow direction of fresh water in fresh water passageway 105 is the same with the flow direction of dense water in dense water passageway 106, membrane stack 100 desalination only can reach 75%, from this it is visible, according to the utility model discloses a membrane stack 100 can improve operating efficiency, has improved out water quality, and the improvement operating efficiency and the play water quality that can be better of the improvement of membrane group 10 quantity.
According to the utility model discloses water purifying equipment 1000, include according to the utility model discloses a membrane stack 100 for water purifying equipment 1000 through adopting above-mentioned membrane stack 100, has promoted the mass transfer effect, and separation efficiency is good, and fresh water goes out water quality of water and obtains improving.
As shown in fig. 4, the water purifying apparatus 1000 according to the embodiment of the present invention further includes a front filter element 200 and a rear filter element 300, the front filter element 200 is connected to the water inlet of the membrane stack 100, wherein the front filter element 200 can be connected to the first water inlet 101, the second water inlet 102, and both the first water inlet 101 and the second water inlet 102, that is, the water quality of the water entering the fresh water channel 105 and the concentrated water channel 106 can be the same or different; the rear filter element 300 is connected with the fresh water outlet 102. Thus, the pre-filter element 200 can remove impurities in raw water, and fresh water after electrodialysis of the membrane stack 100 is filtered by the post-filter element 300, so that the water quality can be improved, and the taste of drinking water is improved.
Other configurations and operations of the water purifying apparatus 1000 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features through another feature not directly in contact. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A membrane stack for a water purification device, characterized in that the membrane stack has a first water inlet, a second water inlet, a fresh water outlet and a concentrate outlet, the first water inlet is communicated with the fresh water outlet and is limited with a fresh water channel, the second water inlet is communicated with the concentrate outlet and is limited with a concentrate channel,
wherein the first water inlet and the concentrated water outlet are located on a first side of the membrane stack, and the second water inlet and the fresh water outlet are located on a second side of the membrane stack opposite to the first side.
2. The membrane stack for a water purification unit of claim 1, wherein the membrane stack comprises:
the membrane group comprises a cation exchange membrane and an anion exchange membrane which are oppositely arranged;
the electrode group comprises a negative electrode plate and a positive electrode plate, the positive electrode plate is arranged on one side of the membrane group, and the negative electrode plate is arranged on the other side of the membrane group;
the pressing plate assembly comprises a first pressing plate and a second pressing plate which are oppositely arranged, the first pressing plate is pressed on the negative electrode plate, the second pressing plate is pressed on the positive electrode plate,
the first pressing plate is provided with the first water inlet and the concentrated water outlet, and the second pressing plate is provided with the second water inlet and the fresh water outlet.
3. The membrane stack for a water purification unit of claim 2, wherein the first water inlet and the concentrate outlet are located on an upper side of the first pressure plate, and the second water inlet and the fresh water outlet are located on a lower side of the second pressure plate.
4. The membrane stack for a water purification unit of claim 3, wherein the membrane stack forms a square shape, the first water inlet and the concentrate outlet are located at one end of a diagonal of the membrane stack, and the second water inlet and the fresh water outlet are located at the other end of the diagonal.
5. The membrane stack for a water purification unit of claim 2, further comprising: the insulating separator is arranged between the first pressing plate and the negative electrode plate, the insulating separator is arranged between the second pressing plate and the positive electrode plate,
the insulating partition plate is provided with a first partition plate water passing hole communicated with the fresh water channel and a second partition plate water passing hole communicated with the concentrated water channel.
6. The membrane stack for a water purification unit of claim 2, further comprising: the flow guide plates are arranged between the electrode group and the membrane group, the flow guide plates are arranged between the cation exchange membrane and the anion exchange membrane,
wherein the guide plate is provided with a first guide channel communicated with the fresh water channel or a second guide channel communicated with the concentrated water channel.
7. The membrane stack for a water purification unit of claim 6, wherein the flow guide comprises:
a first baffle disposed adjacent to the cation exchange membrane and between the negative electrode plate and the cation exchange membrane;
a second flow guide plate disposed between the cation exchange membrane and the anion exchange membrane;
a third baffle disposed adjacent to the anion exchange membrane and between the anion exchange membrane and the positive electrode plate,
the first guide plate is provided with the second guide channel, the third guide plate is provided with the second guide channel, and the second guide plate is provided with the first guide channel or the second guide channel.
8. The membrane stack for a water purification unit of claim 7, wherein the membrane group comprises a plurality of groups, the second flow guide plate comprises a plurality of second flow guide plates, and the plurality of second flow guide plates correspond to the membrane groups one to one.
9. The membrane stack for a water purification unit of claim 1, wherein the membrane stack is an electrodialysis membrane stack.
10. A water purification apparatus, comprising a membrane stack for a water purification apparatus according to any one of claims 1 to 9.
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| CN202022986278.4U CN214880427U (en) | 2020-12-10 | 2020-12-10 | Membrane stack for water purification unit and water purification unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114149058A (en) * | 2020-12-10 | 2022-03-08 | 佛山市美的清湖净水设备有限公司 | Membrane stack for water purification unit and water purification unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114149058A (en) * | 2020-12-10 | 2022-03-08 | 佛山市美的清湖净水设备有限公司 | Membrane stack for water purification unit and water purification unit |
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