CN216106440U

CN216106440U - Long-acting water purification system and water purification equipment

Info

Publication number: CN216106440U
Application number: CN202023167247.2U
Authority: CN
Inventors: 陈小平; 吕苏; 晏博; 董红晨; 郝楠
Original assignee: Guangdong Lizi Technology Co Ltd
Current assignee: Guangdong Lizi Technology Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2022-03-22
Anticipated expiration: 2030-12-24

Abstract

The utility model discloses a long-acting water purification system and water purification equipment, which comprise a main pipeline, a water pump, a bipolar membrane filter element, a first branch pipeline and a second branch pipeline, wherein the main pipeline is connected with the water pump; the water pump, the bipolar membrane filter element and the membrane filter element are sequentially arranged on the main pipeline; the bipolar membrane filter element comprises a positive electrode, a negative electrode and at least two bipolar membranes; the positive electrode and the negative electrode are oppositely arranged, and the bipolar membrane is arranged between the positive electrode and the negative electrode; a first flow channel is formed between the negative electrode and the bipolar membrane, a second flow channel is formed between the bipolar membranes, and a third flow channel is formed between the bipolar membrane and the positive electrode; the water inlet ends of the first flow passage, the second flow passage and the third flow passage are all communicated with the main pipeline; one end of the first branch flow pipeline is communicated with the water outlet end of the first flow channel, and the other end of the first branch flow pipeline is communicated with the main pipeline and is positioned behind the membrane filter element; the water outlet end of the second flow passage is communicated with the main pipeline; one end of the second branch pipeline is communicated with the water outlet end of the third flow channel and is used for draining water in the third flow channel.

Description

Long-acting water purification system and water purification equipment

Technical Field

The utility model relates to the technical field of water treatment, in particular to a long-acting water purification system and water purification equipment.

Background

The water purifying equipment is also called water purifier and water quality purifier, and is water treating equipment for deep filtering and purifying water according to water requirement. The technical core of the water purifier is a filter element device, and the filter element device generally comprises an ultrafiltration membrane filter element, an RO reverse osmosis membrane filter element, a nanofiltration membrane filter element and the like. These cartridges, which filter water through various types of filter membranes, are called membrane cartridges. The membrane filter element is divided into a water inlet side and a water outlet side, raw water and waste water are on the water inlet side, and filtered purified water is on the water outlet side.

In the use, incrustation scale can be attached to gradually to the filtration membrane of membrane filter core to be difficult to clear away, influence the filter effect, generally can only change the filter core, be difficult to satisfy the demand of long-term use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a long-acting water purification system and water purification equipment, which can prevent scales from being generated on a filter membrane, ensure the filter effect and be used for a long time.

The utility model discloses a long-acting water purification system, which comprises a main pipeline, a water pump, a bipolar membrane filter element, a first branch pipeline and a second branch pipeline, wherein the main pipeline is connected with the water pump; the water pump, the bipolar membrane filter element and the membrane filter element are sequentially arranged on the main pipeline; the bipolar membrane filter element comprises a positive electrode, a negative electrode and at least two bipolar membranes; the positive electrode is arranged opposite to the negative electrode, and the bipolar membrane is arranged between the positive electrode and the negative electrode; a first flow channel is formed between the negative electrode and the bipolar membrane, a second flow channel is formed between the bipolar membranes, and a third flow channel is formed between the bipolar membrane and the positive electrode; the water inlet ends of the first flow passage, the second flow passage and the third flow passage are all communicated with the main pipeline; one end of the first branch flow pipeline is communicated with the water outlet end of the first flow channel, and the other end of the first branch flow pipeline is communicated with the main pipeline and is positioned behind the membrane filter element; the water outlet end of the second flow passage is communicated with the main pipeline; and one end of the second branch pipeline is communicated with the water outlet end of the third flow channel and is used for draining the water in the third flow channel.

Optionally, the water purification system further comprises a waste water pipeline; one end of the waste water pipeline is communicated with the water inlet side of the membrane filter element; the other end of the second branch pipeline is communicated with the waste water pipeline.

Optionally, the water purification system further comprises a flow limiting module; the flow limiting module is arranged on the waste water pipeline and used for limiting the size of water flow in the waste water pipeline.

Optionally, the flow restricting module is located before the second branch line.

Optionally, the flow restricting module is located after the second branch line.

Optionally, the flow limiting module is a valve, a curved flow passage or a flow limiting orifice plate.

Optionally, the bipolar membrane comprises a first ion exchange membrane and a second ion exchange membrane which are closely attached to each other; the first flow channel is formed between the negative electrode and the first ion exchange membrane, the second flow channel is formed between the first ion exchange membrane and the second ion exchange membrane of two adjacent bipolar membranes, and the third flow channel is formed between the first ion exchange membrane and the positive electrode.

Optionally, the water purification system further comprises a pre-filter element; the front filter element is arranged on the main pipeline and is positioned in front of the water pump.

Optionally, the water purification system further comprises a pre-filter element; the prepositive filter element is arranged on the main pipeline and the first branch pipeline respectively, and is arranged on the main pipeline, and the prepositive filter element is positioned between the bipolar membrane filter element and the membrane filter element.

The utility model also discloses water purification equipment comprising the water purification system.

In the long-acting water purification system, water in a first flow passage in the bipolar membrane filter element is alkalescent, water in a second flow passage is normal acid-base water, and water in a third flow passage is weak acid. The alkalescent water is beneficial to human bodies, and the water in the first flow passage can jump over the membrane filter element through the first branch pipeline and is directly supplied to users for drinking; the weak acidity is not beneficial to human bodies, and the water in the third flow passage is directly discharged through the second branch pipeline; the water of third runner is handled through the desalination of bipolar membrane filter core back, and the hardness reduces, and the pH is normal, directly filters through the membrane filter core, and the incrustation scale is difficult to produce by the membrane filter core, guarantees the filter effect, and the membrane filter core can be used for a long time.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. It is obvious that the drawings in the following description are only some embodiments of the utility model, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic diagram of a water purification system according to an embodiment of the present invention;

FIG. 2 is a schematic view of a bipolar membrane according to an embodiment of the present invention;

FIG. 3 is a schematic view of a bipolar membrane cartridge according to an embodiment of the present invention adsorbing ions;

FIG. 4 is a schematic illustration of the regeneration of a bipolar membrane cartridge according to an embodiment of the present invention;

fig. 5 is another schematic diagram of a water purification system according to an embodiment of the present invention.

Wherein, 1, a main pipeline; 2. a water pump; 3. a bipolar membrane cartridge; 31. a positive electrode; 32. a negative electrode; 33. bipolar membrane; 331. a first ion exchange membrane; 332. a second ion exchange membrane; 34. A first flow passage; 35. a second flow passage; 36. a third flow path; 37. a water inlet end; 38. a water outlet end; 4. a membrane cartridge; 41. a water inlet side; 42. a water outlet side; 43. a filtration membrane; 5. a first branch line; 6. a second branch line; 7. a waste water line; 8. a current limiting module; 9. the front-mounted filter element.

Detailed Description

It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present invention may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

The utility model is described in detail below with reference to the figures and alternative embodiments.

As shown in fig. 1 and 2, as an embodiment of the present invention, a long-term water purification system is disclosed, which includes a main pipeline 1, a water pump 2, a bipolar membrane cartridge 3, a membrane cartridge 4, a first branch pipeline 5, and a second branch pipeline 6. The water pump 2, the bipolar membrane filter element 3 and the membrane filter element 4 are sequentially arranged on the main pipeline 1. The bipolar membrane filter element 3 comprises a positive electrode 31, a negative electrode 32 and at least two bipolar membranes 33; the positive electrode 31 is disposed opposite to the negative electrode 32, and the bipolar membrane 33 is disposed between the positive electrode 31 and the negative electrode 32. A first flow channel 34 is formed between the negative electrode 32 and the bipolar membrane 33, a second flow channel 35 is formed between the bipolar membrane 33, and a third flow channel 36 is formed between the bipolar membrane 33 and the positive electrode 31. The water inlet ends 37 of the first flow passage 34, the second flow passage 35 and the third flow passage 36 are all communicated with the main pipeline 1. One end of the first branch pipeline 5 is communicated with the water outlet end 28 of the first flow channel 34, and the other end is communicated with the main pipeline 1 and is positioned behind the membrane filter element 4; the water outlet end 28 of the second flow passage 35 is communicated with the main pipeline 1; one end of the second branch pipe 6 is communicated with the water outlet end 28 of the third flow channel 36, and is used for draining the water in the third flow channel 36.

The membrane cartridge 4 according to the present invention refers to a cartridge using various filtration membranes 43, such as a reverse osmosis cartridge, an ultrafiltration cartridge, a nanofiltration cartridge, and the like. Specifically, the membrane filter element 4 is a reverse osmosis filter element, a nanofiltration filter element or an ultrafiltration filter element. The filter membrane 43 divides the cartridge into a water inlet side 41 and a water outlet side 42. The water inlet side 41 refers to the side of the membrane filter element 4 which is not yet filtered by the membrane and is provided with raw water or waste water; the outlet side 42 refers to the side of the membrane cartridge 4 where water has been filtered, where it is purified for consumption by a user. In the present invention, the water is raw water, purified water and waste water. The raw water is water before being filtered by the membrane filter 4; the purified water refers to water filtered by a reverse osmosis membrane and is drunk by a user; the waste water refers to water remaining on the water inlet side 41 after the raw water is continuously filtered by the filter membrane 43, and this part of the water generally has a higher TDS concentration (Total dissolved solids) than the raw water and can be discharged through the waste water line 7.

As shown in FIG. 3, the bipolar membrane filter core adopted by the utility model is composed of one or more pairs of electrodes and at least one or more bipolar membranes in the middle of the electrodes; each bipolar membrane consists of a cation exchange membrane and an anion exchange membrane which are compounded together, the cation exchange membrane and the anion exchange membrane which form the bipolar membrane form a runner.

In the bipolar membrane filter element, in the desalination process, the anode membrane of the bipolar membrane faces the positive electrode, and raw water is desalinated in a flow channel formed between the two bipolar membranes, as shown in fig. 3. Anions in the raw water such as Cl < - > move towards the positive electrode to replace OH < - > in the anion exchange membrane on the left side, and OH < - > enters the flow channel; meanwhile, cations such as Na + in the raw water move towards the negative electrode direction to replace H + ions in the cation exchange membrane of the bipolar membrane on the right side, and the H + enters the flow channel; h + and OH-are subjected to neutralization reaction in the flow channel to generate water, so that the salt in the raw water is removed, and the pure water flows out from the tail end of the flow channel.

When desalination is carried out for a period of time, the bipolar membrane filter core needs to be subjected to reverse regeneration, and then the bipolar membrane filter core is reversely electrified to release ions in water adsorbed on the bipolar membrane. At this time, as shown in fig. 4, OH "and H + ions are generated in the interface layers of the cation membrane and the anion membrane of the bipolar membrane under the electric field, cations such as Na + inside the cation membrane of the bipolar membrane are replaced by the H + ions and move to the negative electrode, anions such as Cl" in the anion membrane of the bipolar membrane are replaced by OH "and move to the positive electrode, and Na + and Cl" enter the flow channel, so that the regeneration process of the bipolar membrane filter element is realized.

Based on the above process of ion desalination by bipolar membrane adsorption, in the long-acting water purification system of the present invention, water in the first flow channel 34 of the bipolar membrane filter element 3 is weakly alkaline, water in the second flow channel 35 is normal acid and alkali, and water in the third flow channel 36 is weakly acidic. The weak alkaline water is beneficial to human bodies, and the water in the first flow passage 34 can jump over the membrane filter element 4 through the first branch pipeline 5 and is directly supplied to users for drinking; the weak acidity is not beneficial to human bodies, and the water in the third flow channel 36 is directly discharged through the second branch pipeline 6; the water of second runner 35 is handled the back through bipolar membrane filter core 3's desalination, and the hardness reduces, and the pH is normal, directly filters through membrane filter core 4, and membrane filter core 4 is difficult to produce the incrustation scale, guarantees the filter effect, and membrane filter core 4 can be long-term the use.

Specifically, the water purification system further comprises a waste water pipeline 7; one end of the waste water pipeline 7 is communicated with the water inlet side 41 of the membrane filter element 4; the other end of the second branch pipe 6 is communicated with the waste water pipe 7. Weakly acidic water in the second branch pipeline 6 is discharged through the waste water pipeline 7.

Further, as shown in fig. 1, the water purification system further includes a flow limiting module 5; the flow limiting module 5 is arranged on the waste water pipeline 7 and is used for limiting the size of water flow in the waste water pipeline 7. The flow limiting module 5 is used for controlling the water flow of the waste water pipeline 7 and reducing the water flow speed so as to improve the water pressure of the water inlet side 41 and improve the filtering efficiency of the filtering membrane 43. More specifically, as shown in fig. 5, the flow restriction module 5 is located before the second branch line 6, so that the flow restriction module 5 and the membrane cartridge 4 are integrated, and the flow restriction module 5 can be replaced at the same time when the membrane cartridge 4 is replaced. Of course, as shown in fig. 1, the flow limiting module 5 may also be located behind the second branch pipe 6, and at this time, the sizes of the water flows in the waste water pipe 7 and the second branch pipe 6 may be controlled simultaneously to reduce the water flow speed, so as to indirectly increase the water flow speed of the first branch pipe 5 and increase the water making amount of the weak alkaline water. Specifically, the flow limiting module 5 may be a valve, a curved flow passage, or a flow limiting orifice plate. The valve and the flow-limiting orifice plate can dynamically control the water flow of the waste water pipeline 7 or the second branch pipeline 6 by controlling the opening and closing size, and the water flow is fixed after the bent flow channel is installed and set, so the flow-limiting module 5 is preferably the valve and the flow-limiting orifice plate.

On the other hand, as shown in fig. 2, the bipolar membrane 33 includes a first ion exchange membrane 331 and a second ion exchange membrane 332 disposed in close proximity to each other; the first flow channel 34 is formed between the negative electrode 32 and the first ion exchange membrane 331, the second flow channel 35 is formed between the first ion exchange membrane 331 and the second ion exchange membrane 332 of two adjacent bipolar membranes 33, and the third flow channel 36 is formed between the first ion exchange membrane 331 and the positive electrode 31. Only the first ion exchange membrane 331 in the first flow passage 34 performs ion exchange, and during the desalination process of the bipolar membrane filter cartridge 3, the water in the first flow passage 34 is weakly alkaline. The second flow passage 35 is provided with a first ion exchange membrane 331 and a second ion exchange membrane 332 for ion exchange, and the weak alkalinity of the water in the second flow passage 35 is normal during the desalination process of the bipolar membrane filter element 3. Only the second ion exchange membrane 332 in the third flow channel 36 performs ion exchange, and during the desalination process of the bipolar membrane filter element 3, the water in the third flow channel 36 will have weak acidity.

As shown in fig. 1, the water purification system further comprises a pre-filter element 9; the front filter element 9 is arranged on the main pipeline 1 and is positioned in front of the water pump 2. The preposed filter element 9 can be any one or the combination of a PP cotton filter element and an active carbon filter element. The PP cotton filter element can filter particle impurities in raw water, and the activated carbon filter element can remove residual chlorine, peculiar smell, color and organic matters in the water. The preposed filter element 9 can be used for pretreating raw water, is beneficial to protecting the membrane filter element 4, the bipolar membrane filter element 3 and the water pump 2, and can also improve the purification effect of the raw water. In another embodiment, as shown in fig. 5, the pre-filter cartridge 9 is disposed on the main pipeline 1 and the first branch pipeline 5, respectively, and the pre-filter cartridge 9 disposed on the main pipeline 1 is located between the bipolar membrane filter cartridge 3 and the membrane filter cartridge 4. Since the water in the second branch pipe 6 is directly drained away, the pre-filter cartridge 9 is only installed on the first branch pipe 5 and the main pipe 1 between the bipolar membrane filter cartridge 3 and the membrane filter cartridge 4 in a targeted manner, and the water supplied to the user can be further processed.

As another embodiment of the present invention, a water purification apparatus is disclosed, comprising the water purification system as described above.

The foregoing is a more detailed description of the utility model in connection with specific alternative embodiments, and the practice of the utility model should not be construed as limited to those descriptions. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.

Claims

1. A long-acting water purification system is characterized by comprising a main pipeline, a water pump, a bipolar membrane filter element, a first branch pipeline and a second branch pipeline; the water pump, the bipolar membrane filter element and the membrane filter element are sequentially arranged on the main pipeline; the bipolar membrane filter element comprises a positive electrode, a negative electrode and at least two bipolar membranes; the positive electrode is arranged opposite to the negative electrode, and the bipolar membrane is arranged between the positive electrode and the negative electrode; a first flow channel is formed between the negative electrode and the bipolar membrane, a second flow channel is formed between the bipolar membranes, and a third flow channel is formed between the bipolar membrane and the positive electrode; the water inlet ends of the first flow passage, the second flow passage and the third flow passage are all communicated with the main pipeline; one end of the first branch flow pipeline is communicated with the water outlet end of the first flow channel, and the other end of the first branch flow pipeline is communicated with the main pipeline and is positioned behind the membrane filter element; the water outlet end of the second flow passage is communicated with the main pipeline; and one end of the second branch pipeline is communicated with the water outlet end of the third flow channel and is used for draining the water in the third flow channel.

2. The water purification system of claim 1, further comprising a waste water line; one end of the waste water pipeline is communicated with the water inlet side of the membrane filter element; the other end of the second branch pipeline is communicated with the waste water pipeline.

3. The water purification system of claim 2, further comprising a flow-limiting module; the flow limiting module is arranged on the waste water pipeline and used for limiting the size of water flow in the waste water pipeline.

4. A water purification system as claimed in claim 3, wherein the flow restriction module is located before the second branch line.

5. A water purification system as claimed in claim 3, wherein the flow restriction module is located after the second branch line.

6. The water purification system of claim 3, wherein the flow restriction module is a valve, a tortuous flow path, or a restriction orifice.

7. The water purification system of claim 1, wherein the bipolar membrane comprises a first ion exchange membrane and a second ion exchange membrane disposed adjacent to each other; the first flow channel is formed between the negative electrode and the first ion exchange membrane, the second flow channel is formed between the first ion exchange membrane and the second ion exchange membrane of two adjacent bipolar membranes, and the third flow channel is formed between the first ion exchange membrane and the positive electrode.

8. The water purification system of claim 1, further comprising a pre-filter element; the front filter element is arranged on the main pipeline and is positioned in front of the water pump.

9. The water purification system of claim 1, further comprising a pre-filter element; the prepositive filter element is arranged on the main pipeline and the first branch pipeline respectively, and is arranged on the main pipeline, and the prepositive filter element is positioned between the bipolar membrane filter element and the membrane filter element.

10. A water purification apparatus, comprising the water purification system of any one of claims 1 to 9.