Membrane module and water purification equipment with same

Abstract

The utility model provides a membrane assembly and water purification equipment with the membrane assembly, and belongs to the field of water purification equipment, the membrane assembly comprises a central pipe, a first membrane unit and a second membrane unit, the first membrane unit and the second membrane unit are wound on the central pipe, a water purification cavity is formed between the first membrane unit and the second membrane unit, and the membrane assembly further comprises a waterproof membrane unit, a part of the waterproof membrane unit is located in the water purification cavity and divides the water purification cavity into a first water purification flow channel and a second water purification flow channel, the waterproof membrane unit wraps the outer side of the first membrane unit, a water permeable area is arranged on the waterproof membrane unit, and the central pipe is communicated with the first water purification flow channel through the water permeable area. According to the membrane assembly, the two membrane units are connected in series, compared with three membrane units connected in series, the flux is larger, the membrane surface flow speed can be increased through the series design of the two membrane units, purified water produced by the first membrane unit and purified water produced by the second membrane unit are isolated from each other, and the system desalination rate can meet the standard of 85%; therefore, the service life of the membrane assembly can be prolonged, and better user experience is provided.

Description

Technical Field

[0001] The utility model belongs to the field of water purification equipment, and in particular relates to a membrane component and water purification equipment having the same. Background Art

[0002] Under normal use, the service life of existing membrane elements with ordinary structures is short and they need to be replaced after a period of time, which is not economical or environmentally friendly. Therefore, there is an urgent need for a new membrane element that can further increase the flow rate, desalination rate and membrane surface flow rate of the membrane element, thereby extending the service life and providing a better user experience.

[0003] A membrane element, a filter element and a water purification device are currently disclosed (patent application number: CN201811109670.1), which include: a water collecting pipe; a first membrane unit, a second membrane unit and a third membrane unit wound on the water collecting pipe, the wastewater outlet of the first membrane unit is connected to the raw water inlet of the second membrane unit, and the wastewater outlet of the second membrane unit is connected to the raw water inlet of the third membrane unit; when the first membrane unit, the second membrane unit and the third membrane unit are in the unfolded state, the wastewater outlet of the first membrane unit and the raw water inlet of the second membrane unit are located on the side at the same position or the wastewater outlet of the second membrane unit and the raw water inlet of the third membrane unit are located on the side at the same position.

[0004] This public solution forms three single-side flow membrane units with a flow direction perpendicular to the central tube by gluing the end caps. These three units are connected in series to increase the membrane flow rate. However, this method has the following technical defects: Since the influent of the second and third membrane units is the wastewater of the first and second sections, when the system recovery rate is greater than 85%, the system desalination rate may not reach 85% (for test conditions, refer to "GB34914-2021"). In addition, the more membrane units are connected in series, the greater the pressure loss. From the perspective of flux, the series connection of two membrane units is better than the series connection of three membrane units. Utility Model Content

[0005] The present application provides a membrane assembly and a water purification device having the same, aiming to solve the technical problems existing in the above-mentioned membrane elements.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A membrane assembly includes a central tube, a first membrane unit and a second membrane unit, the first membrane unit and the second membrane unit are wound around the central tube, a clean water cavity is formed between the first membrane unit and the second membrane unit, and also includes a water-proof membrane unit, a part of the water-proof membrane unit is located in the clean water cavity and divides it into a first clean water flow channel and a second clean water flow channel, the water-proof membrane unit is wrapped around the outside of the first membrane unit, a water-permeable area is provided on the water-proof membrane unit, and the central tube is connected to the first clean water flow channel through the water-permeable area.

[0008] Preferably, the first membrane unit is provided with a first raw water flow channel, the second membrane unit is provided with a concentrated water inlet and a second raw water flow channel, the first raw water flow channel is connected to the concentrated water inlet, and the concentrated water inlet is connected to the second raw water flow channel.

[0009] Preferably, a first grid layer is provided on the front of the first membrane unit, the first grid layer forms a first raw water flow channel, and a second grid layer is provided on the front of the second membrane unit, the second grid layer forms a second raw water flow channel.

[0010] Preferably, the lower side of the second membrane unit is completely sealed by gluing the front of the membrane, and the upper side of the second membrane unit is sealed away from the central tube by gluing the front of the membrane, and the upper side of the second membrane unit is close to the unsealed area of the central tube to form a concentrated water inlet.

[0011] Preferably, the waterproof membrane unit is provided with a fold line, the permeable area is located above the fold line, the fold line is adjacent to the central tube, and the right side of the waterproof membrane unit away from the central tube is completely sealed by gluing the internal front side.

[0012] Preferably, the back of each of the first membrane units is provided with a first clean water flow channel formed by gluing, and the water outlet of the first clean water flow channel is connected to the water permeable area.

[0013] Preferably, the central tube is provided with a first chamber and a second chamber, both of which are connected to the clean water outlet of the central tube, the permeable area is connected to the first chamber, and the back of the second membrane unit is provided with a second clean water flow channel formed by gluing, and the outlet of the second clean water flow channel is connected to the second chamber.

[0014] Preferably, a guide cloth roll is wound around the outside of the water-blocking membrane unit.

[0015] A water purification device, characterized by comprising any membrane assembly as described above.

[0016] The utility model has the following beneficial effects:

[0017] This membrane module is a two-stage membrane unit connected in series. Compared with the three-stage membrane unit connected in series, it has a larger flux. The two-stage membrane unit series design can also increase the membrane surface flow rate, and the clean water produced by the first membrane unit and the clean water produced by the second membrane unit are isolated from each other. The system desalination rate can meet the 85% standard, thereby extending the life of the membrane module and providing a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the raw water flow direction of the first membrane unit and the second membrane unit in the present invention;

[0019] Figure 2 This is a schematic diagram of the expanded state of the water-isolating membrane unit in the utility model;

[0020] Figure 3 This is a schematic diagram of the purified water flow direction of the first membrane unit in the present utility model;

[0021] Figure 4 This is a schematic diagram of the purified water flow direction of the second membrane unit in the present utility model.

[0022] Among them, 1-central tube, 2-first membrane unit, 21-first grid layer, 22-first raw water flow channel, 23-second sealing structure, 3-second membrane unit, 31-concentrated water inlet, 32-second raw water flow channel, 33-first sealing structure, 34-second grid layer, 35-fourth sealing structure, 4-water-isolating membrane unit, 41-crease line, 42-permeable area, 43-third sealing structure, 5-roll guide cloth. DETAILED DESCRIPTION

[0023] Example 1

[0024] like Figure 1-4 As shown, a membrane assembly includes a central tube 1, a first membrane unit 2 and a second membrane unit 3, the first membrane unit 2 and the second membrane unit 3 are wound around the central tube 1, and a clean water cavity is formed between the first membrane unit 2 and the second membrane unit 3. It is characterized in that it also includes a water-proof membrane unit 4, a part of the water-proof membrane unit 4 is located in the clean water cavity and divides it into a first clean water flow channel and a second clean water flow channel, the water-proof membrane unit 4 is wrapped around the outside of the first membrane unit 2, and a water-permeable area 42 is provided on the water-proof membrane unit 4, and the central tube 1 is connected with the first clean water flow channel through the water-permeable area 42.

[0025] The water-blocking membrane unit 4 is used to separate the first membrane unit 2 and the second membrane unit 3, and also separate the clean water filtered between the two membrane units, and divide the clean water cavity between them into two parts, that is, the part of the clean water cavity corresponding to the first membrane unit 2 is the first clean water flow channel, and the part of the clean water cavity corresponding to the second membrane unit 3 is the second clean water flow channel.

[0026] The first membrane unit 2 is provided with a first raw water flow channel 22 , and the second membrane unit 3 is provided with a concentrated water inlet 31 and a second raw water flow channel 32 . The first raw water flow channel 22 is connected to the concentrated water inlet 31 , and the concentrated water inlet 31 is connected to the second raw water flow channel 32 .

[0027] The raw water enters from the lower side of the first membrane unit 2. Because the left side of the first membrane unit 2 is a fold and the right side is sealed with glue, after the raw water enters the first membrane unit 2, it flows along the first raw water flow channel 22 formed by the first grid layer 21. After being filtered by the first membrane unit 2, the remaining concentrated water continues to flow and enters the second membrane unit 3 from the concentrated water inlet 31, and flows along the second raw water flow channel 32 formed by the second grid layer 34. Finally, the remaining wastewater after the filtration is completed flows out from the right side of the second membrane unit 3; in the process of the raw water flowing through the first membrane unit 2 and the second membrane unit 3, the pure water passes through the membrane unit and enters the back, and then enters the central tube 1 through the pure water flow channel formed by the second sealing structure 23 and the fourth sealing structure 35 and is collected.

[0028] The water-blocking membrane unit 4 wraps the first membrane unit 2 inside, thereby separating the first membrane unit 2 from the second membrane unit 3 .

[0029] The water flow direction of the first raw water flow channel 22 is parallel to the central pipe 1 , and the water flow direction of the second raw water flow channel 32 is perpendicular to the central pipe 1 .

[0030] A first mesh layer 21 is provided on the front of the first membrane unit 2 to form a first raw water flow channel 22 . A second mesh layer 34 is provided on the front of the second membrane unit 3 to form a second raw water flow channel 32 .

[0031] The lower side of the second membrane unit 3 is completely sealed by gluing, and the upper side of the second membrane unit 3 is sealed away from the central tube by gluing. The unsealed area of the upper side of the second membrane unit 3 close to the central tube forms a concentrated water inlet 31.

[0032] The sealing of the side of the second membrane unit 3 is achieved by the first sealing structure 33. Figure 1 The first sealing structure 33 is only shown on the second grid layer 34. In fact, the sealing structure is located on the side and is sealed together with the side of the grid layer.

[0033] The first sealing structure 33 is formed by the glue line sealing on the front side of the diaphragm of the second membrane unit 3 .

[0034] The waterproof membrane unit 4 is provided with a fold line 41, and the water permeable area 42 is located above the fold line 41. The fold line 41 is adjacent to the central tube 1, and the right side of the waterproof membrane unit 4 is completely sealed by gluing.

[0035] The right side of the water-blocking membrane unit 4 is completely sealed by the third sealing structure 43. The third sealing structure 43 is formed by gluing the front surface of the inner portion of the water-blocking membrane unit 4.

[0036] The back of the first membrane unit 2 is respectively provided with a first clean water flow channel formed by gluing, and the water outlet of the first clean water flow channel is communicated with the water permeable area 42.

[0037] The first purified water flow channel is formed by a second sealing structure 23, which is formed by U-shaped glueing on the back of the first membrane unit 2. The second sealing structure 23 is provided on the back of both sides of the first membrane unit 2.

[0038] The central tube 1 is provided with a first chamber and a second chamber, both of which are communicated with the purified water outlet of the central tube 1 , and the water permeable area 42 is communicated with the first chamber.

[0039] The purified water produced by the first membrane unit 2 enters the first chamber.

[0040] The first chamber and the second chamber are isolated from each other and are not connected.

[0041] The back of the second membrane unit 3 is respectively provided with a second clean water flow channel formed by gluing the back surface, and the water outlet of the second clean water flow channel is communicated with the second chamber.

[0042] The purified water produced by the second membrane unit 3 enters the second chamber.

[0043] The second purified water flow channel is formed by the fourth sealing structure 35 , and the fourth sealing structure 35 is formed by the glue line sealing on the back of the second membrane unit 3 .

[0044] A guide cloth roll 5 is wound around the outer side of the water-blocking membrane unit 4 .

[0045] Example 2

[0046] The difference between this embodiment and embodiment 1 is that: a water purification device has the membrane assembly in embodiment 1.

[0047] Example 3

[0048] The difference between this embodiment and embodiment 1 is that the size of the concentrated water inlet 31 can be adjusted, and the length can occupy 0 to 50% of the side.

[0049] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in this field within the scope of the present invention are included in the patent scope of the present invention.

Claims

1. A membrane assembly comprising a central tube (1), a first membrane unit (2) and a second membrane unit (3), wherein the first membrane unit (2) and the second membrane unit (3) are wound around the central tube (1), and a water purification cavity is formed between the first membrane unit (2) and the second membrane unit (3), characterized in that: The invention also includes a water-isolating membrane unit (4), a portion of which is located in the water purification chamber and divides the chamber into a first water purification channel and a second water purification channel. The water-isolating membrane unit (4) is wrapped around the outside of the first membrane unit (2). A water-permeable area (42) is provided on the water-isolating membrane unit (4), and the central tube (1) is connected to the first water purification channel through the water-permeable area (42).

2. A membrane assembly according to claim 1, characterized in that: The first membrane unit (2) is provided with a first raw water flow channel (22), and the second membrane unit (3) is provided with a concentrated water inlet (31) and a second raw water flow channel (32). The first raw water flow channel (22) is communicated with the concentrated water inlet (31), and the concentrated water inlet (31) is communicated with the second raw water flow channel (32).

3. A membrane assembly according to claim 1, characterized in that: A first mesh layer (21) is provided on the front of the first membrane unit (2), and the first mesh layer (21) forms a first raw water flow channel (22). A second mesh layer (34) is provided on the front of the second membrane unit (3), and the second mesh layer (34) forms a second raw water flow channel (32).

4. The membrane assembly according to claim 1, characterized in that: The lower side of the second membrane unit (3) is completely sealed by gluing the front side of the membrane, and the upper side of the second membrane unit (3) is sealed away from the central tube by gluing the front side of the membrane. The upper side of the second membrane unit (3) is close to the unsealed area of the central tube to form a concentrated water inlet (31).

5. The membrane assembly according to claim 1, characterized in that: The water-blocking membrane unit (4) is provided with a fold line (41), the water-permeable area (42) is located above the fold line (41), the fold line (41) is adjacent to the central tube (1), and the right side of the water-blocking membrane unit (4) away from the central tube is completely sealed by gluing the internal front side.

6. The membrane assembly according to claim 1, characterized in that: The back of the first membrane unit (2) is respectively provided with a first clean water flow channel formed by gluing, and the water outlet of the first clean water flow channel is communicated with the water permeable area (42).

7. A membrane assembly according to claim 6, characterized in that: The central tube (1) is provided with a first chamber and a second chamber, both of which are connected to the clean water outlet of the central tube (1), the water permeable area (42) is connected to the first chamber, and the back of the second membrane unit (3) is provided with a second clean water flow channel formed by gluing, and the water outlet of the second clean water flow channel is connected to the second chamber.

8. The membrane assembly according to claim 1, characterized in that: A flow guide cloth roll (5) is wound around the outer side of the water-blocking membrane unit (4).

9. A water purification device, characterized in that: A membrane module according to any one of claims 1 to 8.

Images