DTRO flow guide disc and membrane assembly

Abstract

The DTRO flow guide disc comprises a flow guide disc body, the front face of the flow guide disc body is provided with a plurality of circles of front face protruding points which are sequentially distributed from the center of the flow guide disc body to the outer side of the flow guide disc body in a concentric circle shape, and in any two adjacent circles of front face protruding points, the center of the front face protruding points is larger than the center of the flow guide disc body. The distribution distance between the front face protruding points in one circle on the outer side is smaller than that between the front face protruding points in one circle on the inner side, and multiple circles of back face protruding points which are sequentially distributed from the center of the flow guide disc body to the outer side in a concentric circle shape are arranged on the back face of the flow guide disc body. And the distribution interval of the reverse salient points in the outer circle is smaller than that of the reverse salient points in the inner circle. When the membrane component is applied to the membrane component, turbulent kinetic energy of concentrated water can be uniformly distributed, so that the scaling speed of each part on the membrane tends to be consistent, the condition that the local scaling speed on the membrane is too high is avoided, the chemical cleaning period of the membrane can be prolonged, and the service life of the membrane can be prolonged.

Description

Technical Field

[0001] The utility model relates to a DTRO guide plate and a membrane component. Background Art

[0002] At present, the membrane assembly is a structure composed of a guide plate and a diaphragm and other components for separating concentrated water. In the process of separating concentrated water, scaling will appear on the diaphragm. When the scaling accumulates to a certain extent, the diaphragm needs to be chemically cleaned. Chemical cleaning will cause the performance of the diaphragm to decay. Therefore, the more frequent the chemical cleaning, the shorter the service life of the diaphragm. As the core component of the membrane assembly, the guide plate plays the role of supporting the diaphragm and increasing the turbulent kinetic energy of concentrated water. The Chinese patent with the announcement number CN214936240U discloses a guide plate for a disc-tube reverse osmosis assembly; wherein, convex points are arranged on the front and back sides of the guide plate, respectively, which can not only support the diaphragm, but also increase the turbulent kinetic energy of concentrated water.

[0003] In the existing guide plates on the market, the protrusions are distributed in concentric circles from the center of the guide plate to the outside, and the number of protrusions in each circle is equal, which results in the protrusions in the inner circle being closely spaced and densely distributed, and the protrusions in the outer circle being far apart and sparsely distributed. Therefore, when the concentrated water flows between the guide plate and the diaphragm, the turbulent kinetic energy formed by the collision of the concentrated water with the densely distributed protrusions on the inner side is larger, and the turbulent kinetic energy formed by the collision of the concentrated water with the sparsely distributed protrusions on the outer side is smaller, resulting in the turbulent kinetic energy on the outer side being smaller than the turbulent kinetic energy on the inner side. In addition, because the greater the turbulent kinetic energy, the lighter the scaling phenomenon on the diaphragm, and conversely, the smaller the turbulent kinetic energy, the more serious the scaling phenomenon on the diaphragm, the use of the existing guide plate will cause the scaling speed on the outer side of the diaphragm to be very fast and the scaling materials to accumulate seriously, while the scaling on the inner side of the diaphragm is lighter and the scaling materials are less concentrated, resulting in serious uneven distribution of scaling materials on the diaphragm. In summary, since the scaling rate on the outer side of the diaphragm is very fast, a lot of scaling will soon accumulate on the outer side of the diaphragm, which will affect the performance of the diaphragm, causing the diaphragm to need to be frequently disassembled for chemical cleaning. Therefore, the use of the existing guide plate will greatly shorten the chemical cleaning cycle of the diaphragm, thereby causing the performance of the diaphragm to decay rapidly, greatly reducing the service life of the diaphragm. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a DTRO guide plate, which is used in the membrane assembly to evenly distribute the turbulent kinetic energy of concentrated water, thereby making the scaling speed of various parts on the membrane tend to be consistent, avoiding the situation where the local scaling speed on the membrane is too fast, thereby extending the cycle of chemical cleaning of the membrane and extending the service life of the membrane.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a DTRO guide plate, which includes a guide plate body;

[0006] The front side of the deflector body is provided with a plurality of front convex points distributed in a concentric circle from the center of the deflector body to the outside;

[0007] In any two adjacent circles of front convex points, the distribution spacing of the outer circle of front convex points is smaller than the distribution spacing of the inner circle of front convex points;

[0008] The reverse side of the deflector body is provided with a plurality of circles of reverse convex points which are sequentially distributed in concentric circles from the center of the deflector body to the outside;

[0009] In any two adjacent circles of reverse convex points, the distribution spacing of the outer circle of reverse convex points is smaller than the distribution spacing of the inner circle of reverse convex points.

[0010] Furthermore, the front convex points in the same circle are evenly distributed along the circumferential direction with equal intervals, and the back convex points in the same circle are evenly distributed along the circumferential direction with equal intervals.

[0011] Further, the front convex dots are provided with 11 circles, which are respectively, from the center to the outside, the first circle of front convex dots, the second circle of front convex dots, the third circle of front convex dots, the fourth circle of front convex dots, the fifth circle of front convex dots, the sixth circle of front convex dots, the seventh circle of front convex dots, the eighth circle of front convex dots, the ninth circle of front convex dots, the tenth circle of front convex dots and the eleventh circle of front convex dots;

[0012] The distribution spacing of the first circle of front convex points is A1, the distribution spacing of the second circle of front convex points is A2, the distribution spacing of the third circle of front convex points is A3, the distribution spacing of the fourth circle of front convex points is A4, the distribution spacing of the fifth circle of front convex points is A5, the distribution spacing of the sixth circle of front convex points is A6, the distribution spacing of the seventh circle of front convex points is A7, the distribution spacing of the eighth circle of front convex points is A8, the distribution spacing of the ninth circle of front convex points is A9, the distribution spacing of the tenth circle of front convex points is A10, and the distribution spacing of the eleventh circle of front convex points is A11; among them, A1>A2>A3>A4>A5>A6>A7>A8>A9>A10>A11.

[0013] Further, the reverse side convex points are provided with 10 circles, which are respectively, from the center to the outside, the first circle of reverse side convex points, the second circle of reverse side convex points, the third circle of reverse side convex points, the fourth circle of reverse side convex points, the fifth circle of reverse side convex points, the sixth circle of reverse side convex points, the seventh circle of reverse side convex points, the eighth circle of reverse side convex points, the ninth circle of reverse side convex points and the tenth circle of reverse side convex points;

[0014] The distribution spacing of the first circle of reverse convex points is B1, the distribution spacing of the second circle of reverse convex points is B2, the distribution spacing of the third circle of reverse convex points is B3, the distribution spacing of the fourth circle of reverse convex points is B4, the distribution spacing of the fifth circle of reverse convex points is B5, the distribution spacing of the sixth circle of reverse convex points is B6, the distribution spacing of the seventh circle of reverse convex points is B7, the distribution spacing of the eighth circle of reverse convex points is B8, the distribution spacing of the ninth circle of reverse convex points is B9, and the distribution spacing of the tenth circle of reverse convex points is B10; among them, B1>B2>B3>B4>B5>B6>B7>B8>B9>B10.

[0015] Further providing a specific structure of the front convex point and the back convex point, the root of the front convex point is connected to the front side of the guide plate body, and the top of the front convex point is a hemispherical structure;

[0016] The root of the reverse side convex point is connected to the reverse side of the guide plate body, and the top of the reverse side convex point is a hemispherical structure.

[0017] Furthermore, chamfers are provided between the roots of the front convex points and the front surface of the guide plate body, and between the roots of the rear convex points and the rear surface of the guide plate body.

[0018] Furthermore, the radial spacing between any two adjacent circles of front convex points is equal, and the radial spacing between any two adjacent circles of back convex points is equal.

[0019] Furthermore, the guide plate body is provided with a connecting column and a connecting hole adapted to the connecting column;

[0020] Any one of the connection column and the connection hole is arranged on the front surface of the guide plate body, and the other one of the connection column and the connection hole is arranged on the reverse surface of the guide plate body;

[0021] A channel is also provided at the center of the guide plate body.

[0022] The utility model also provides a membrane assembly, which includes at least two DTRO guide plates as described above, wherein the DTRO guide plates are stacked in sequence, and a diaphragm is provided between adjacent DTRO guide plates, and the inner periphery of the diaphragm is sealed and connected to the adjacent DTRO guide plates through a sealing ring.

[0023] Further, the diaphragm is located between the front convex point in one of the DTRO guide discs and the reverse convex point in another adjacent DTRO guide disc;

[0024] The axial distance D between the front convex point in one of the DTRO guide discs and the reverse convex point in another adjacent DTRO guide disc is 4 to 6 times the thickness of the diaphragm.

[0025] After adopting the above technical solution, on the front side of the guide plate body, the distribution spacing of the front convex points becomes smaller as it goes to the outer circle, and the distribution spacing of the front convex points becomes larger as it goes to the inner circle. Therefore, the closer to the outer end of the guide plate body, the more the distribution of the front convex points is, the denser the distribution is, while the closer to the inner end of the guide plate body, the fewer the distribution of the front convex points is, and the sparser the distribution is. Similarly, on the back side of the guide plate body, the distribution spacing of the back convex points becomes smaller as it goes to the outer circle, and the distribution spacing of the back convex points becomes larger as it goes to the inner circle. Therefore, the closer to the outer end of the guide plate body, the more the distribution of the back convex points is, the denser the distribution is, while the closer to the inner end of the guide plate body, the fewer the distribution of the back convex points is, and the sparser the distribution is.

[0026] The front convex points and the back convex points are used to increase the turbulent kinetic energy of the concentrated water. When the concentrated water flows, it collides with the front convex points and the back convex points to form turbulence, thereby increasing the turbulent kinetic energy. Wherein, under the same flow rate, the denser the front convex points and the back convex points are distributed, the greater the turbulent kinetic energy generated by the collision of the concentrated water with the front convex points and the back convex points.

[0027] When the DTRO guide plate of the embodiment of the present application is used in a membrane assembly, the guide plate body and the diaphragms are alternately stacked in sequence, and the concentrated water flows between the guide plate body and the diaphragms; wherein, on the front side of the guide plate body, the concentrated water converges from the surroundings to the center, and on the back side of the guide plate body, the concentrated water diverges from the center to the surroundings. Since the area is smaller towards the inner side and larger towards the outer side, whether on the front or back side of the guide plate body, the concentrated water flow rate is smaller towards the outer side and faster towards the inner side.

[0028] The front and back convex points on the guide plate body are more densely distributed toward the outside and more sparsely distributed toward the inside. In the area close to the outside, the flow rate of the concentrated water is low, so the kinetic energy of the concentrated water itself is small. When the concentrated water with a low flow rate collides with the densely distributed front and back convex points, more turbulent kinetic energy will be increased, so that the concentrated water has a sufficiently large turbulent kinetic energy in the outer area. In the area close to the inside, the flow rate of the concentrated water is high, so the kinetic energy of the concentrated water itself is large. When the concentrated water with a high flow rate collides with the sparsely distributed front and back convex points, the increased turbulent kinetic energy is small, but after combining the kinetic energy of the concentrated water itself, a sufficiently large turbulent kinetic energy can be obtained. Therefore, in the embodiment of the present application, the turbulent kinetic energy of the concentrated water in each area can be evenly distributed to the greatest extent, so that the surface of the diaphragm is evenly flushed by the concentrated water; and the uniform distribution of the turbulent kinetic energy can make the scaling speed of each part of the diaphragm tend to be uniform, avoiding the situation where the local scaling speed on the diaphragm is too fast, thereby extending the cycle of chemical cleaning of the diaphragm and extending the service life of the diaphragm. Among them, the size of turbulent kinetic energy will affect the scaling rate on the diaphragm. The larger the turbulent kinetic energy in a certain area, the milder the scaling phenomenon on the diaphragm in that area. Conversely, the smaller the turbulent kinetic energy in a certain area, the more serious the scaling phenomenon on the diaphragm in that area. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of the front side of the DTRO guide plate of the utility model;

[0030] Figure 2 It is a structural schematic diagram of the reverse side of the DTRO guide plate of the utility model;

[0031] Figure 3 It is a structural schematic diagram of the membrane assembly of the utility model;

[0032] Figure 4 for Figure 3 Partial detail drawing of . DETAILED DESCRIPTION

[0033] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0034] Embodiment 1

[0035] like Figure 1 , 2 As shown, a DTRO guide plate comprises a guide plate body 1;

[0036] The front side of the deflector body 1 is provided with a plurality of front convex points 2 which are distributed in a concentric circle from the center of the deflector body 1 to the outside.

[0037] In any two adjacent circles of front convex points 2, the distribution spacing of the outer circle of front convex points 2 is smaller than the distribution spacing of the inner circle of front convex points 2;

[0038] The reverse side of the deflector body 1 is provided with a plurality of circles of reverse side convex points 3 which are sequentially distributed in concentric circles from the center of the deflector body 1 to the outside;

[0039] In any two adjacent circles of reverse convex points 3, the distribution spacing of the reverse convex points 3 of the outer circle is smaller than the distribution spacing of the reverse convex points 3 of the inner circle. Specifically, on the front side of the deflector plate body 1, the distribution spacing of the front convex points 2 is smaller as it goes to the outer circle, and the distribution spacing of the front convex points 2 is larger as it goes to the inner circle. Therefore, the closer to the outer end of the deflector plate body 1, the more the number of the front convex points 2 is distributed, the denser the distribution is, and the closer to the inner end of the deflector plate body 1, the fewer the number of the front convex points 2 is distributed, and the sparser the distribution is. Similarly, on the reverse side of the deflector plate body 1, the distribution spacing of the reverse convex points 3 is smaller as it goes to the outer circle, and the distribution spacing of the reverse convex points 3 is larger as it goes to the inner circle. Therefore, the closer to the outer end of the deflector plate body 1, the more the number of the reverse convex points 3 is distributed, the denser the distribution is, and the closer to the inner end of the deflector plate body 1, the fewer the number of the reverse convex points 3 is distributed, and the sparser the distribution is.

[0040] More specifically, the front convex points 2 and the back convex points 3 are used to increase the turbulent kinetic energy of the concentrated water. When the concentrated water flows, it collides with the front convex points 2 and the back convex points 3 to form turbulence, thereby increasing the turbulent kinetic energy. Wherein, under the same flow rate, the denser the distribution of the front convex points 2 and the back convex points 3, the greater the turbulent kinetic energy generated by the collision of the concentrated water with the front convex points 2 and the back convex points 3.

[0041] like Figures 1 to 4 As shown, when the DTRO guide plate of the embodiment of the present application is used in a membrane assembly, the guide plate body 1 and the diaphragms 7 are alternately stacked in sequence, and the concentrated water flows between the guide plate body 1 and the diaphragms 7; wherein, on the front side of the guide plate body 1, the concentrated water converges from the surroundings to the center, and on the back side of the guide plate body 1, the concentrated water diverges from the center to the surroundings. Since the area is smaller towards the inner side and larger towards the outer side, whether on the front or back side of the guide plate body 1, the concentrated water flow rate is smaller towards the outer side and faster towards the inner side.

[0042] In this embodiment, the front convex points 2 and the back convex points 3 on the guide plate body 1 are distributed more densely toward the outside and more sparsely toward the inside. In the area close to the outside, the flow rate of the concentrated water is low and thus the kinetic energy of the concentrated water itself is small. When the concentrated water with a low flow rate collides with the densely distributed front convex points 2 and the back convex points 3, more turbulent kinetic energy is added, thereby making the concentrated water have sufficiently large turbulent kinetic energy in the outer area. In the area close to the inner side, the flow rate of the concentrated water is high, so the kinetic energy of the concentrated water itself is large. When the concentrated water with a high flow rate collides with the sparsely distributed front convex points 2 and the back convex points 3, the increased turbulent kinetic energy is small, but after combining with the kinetic energy of the concentrated water itself, it can also obtain a sufficiently large turbulent kinetic energy. Therefore, in the embodiment of the present application, the turbulent kinetic energy of the concentrated water in each area can be evenly distributed to the greatest extent, so that the surface of the diaphragm 7 is evenly flushed by the concentrated water; and the uniform distribution of the turbulent kinetic energy can make the scaling speed of each part of the diaphragm 7 tend to be uniform, avoiding the situation where the local scaling speed on the diaphragm 7 is too fast, thereby extending the cycle of chemical cleaning of the diaphragm 7 and extending the service life of the diaphragm 7. Specifically, the size of the turbulent kinetic energy will affect the scaling speed on the diaphragm 7. When the turbulent kinetic energy in a certain area is larger, the scaling phenomenon on the diaphragm 7 in the area is milder. On the contrary, when the turbulent kinetic energy in a certain area is smaller, the scaling phenomenon on the diaphragm 7 in the area is more serious.

[0043] In the embodiment of the present application, the distribution spacing of a circle of front convex points 2 refers to the circumferential distance between two adjacent front convex points 2 in the circle of front convex points 2. Similarly, the distribution spacing of a circle of back convex points 3 refers to the circumferential distance between two adjacent back convex points 3 in the circle of back convex points 3.

[0044] like Figure 1 , 2 As shown, the front convex points 2 in the same circle are evenly distributed along the circumferential direction with equal intervals, and the back convex points 3 in the same circle are evenly distributed along the circumferential direction with equal intervals.

[0045] like Figure 1 As shown, the front convex dots 2 are provided with 11 circles, which are respectively, from the center to the outside, the first circle of front convex dots, the second circle of front convex dots, the third circle of front convex dots, the fourth circle of front convex dots, the fifth circle of front convex dots, the sixth circle of front convex dots, the seventh circle of front convex dots, the eighth circle of front convex dots, the ninth circle of front convex dots, the tenth circle of front convex dots and the eleventh circle of front convex dots;

[0046] The distribution spacing of the first circle of front convex points is A1, the distribution spacing of the second circle of front convex points is A2, the distribution spacing of the third circle of front convex points is A3, the distribution spacing of the fourth circle of front convex points is A4, the distribution spacing of the fifth circle of front convex points is A5, the distribution spacing of the sixth circle of front convex points is A6, the distribution spacing of the seventh circle of front convex points is A7, the distribution spacing of the eighth circle of front convex points is A8, the distribution spacing of the ninth circle of front convex points is A9, the distribution spacing of the tenth circle of front convex points is A10, and the distribution spacing of the eleventh circle of front convex points is A11; wherein, A1>A2>A3>A4>A5>A6>A7>A8>A9>A10>A11; specifically, the first circle of front convex points is located at the innermost side, the second circle of front convex points is located outside the first circle of front convex points, the third circle of front convex points is located outside the second circle of front convex points, and so on.

[0047] like Figure 2 As shown, the reverse convex points 3 are provided with 10 circles, which are respectively the first circle of reverse convex points, the second circle of reverse convex points, the third circle of reverse convex points, the fourth circle of reverse convex points, the fifth circle of reverse convex points, the sixth circle of reverse convex points, the seventh circle of reverse convex points, the eighth circle of reverse convex points, the ninth circle of reverse convex points and the tenth circle of reverse convex points from the center to the outside;

[0048] The distribution spacing of the first circle of reverse convex points is B1, the distribution spacing of the second circle of reverse convex points is B2, the distribution spacing of the third circle of reverse convex points is B3, the distribution spacing of the fourth circle of reverse convex points is B4, the distribution spacing of the fifth circle of reverse convex points is B5, the distribution spacing of the sixth circle of reverse convex points is B6, the distribution spacing of the seventh circle of reverse convex points is B7, the distribution spacing of the eighth circle of reverse convex points is B8, the distribution spacing of the ninth circle of reverse convex points is B9, and the distribution spacing of the tenth circle of reverse convex points is B10; wherein, B1>B2>B3>B4>B5>B6>B7>B8>B9>B10; specifically, the first circle of reverse convex points is located at the innermost side, the second circle of reverse convex points is located outside the first circle of reverse convex points, the third circle of reverse convex points is located outside the second circle of reverse convex points, and so on.

[0049] Specifically, the root of the front protrusion 2 is connected to the front side of the guide plate body 1, and the top of the front protrusion 2 is a hemispherical structure. The root of the rear protrusion 3 is connected to the rear side of the guide plate body 1, and the top of the rear protrusion 3 is a hemispherical structure.

[0050] In this embodiment, chamfers are provided between the root of the front protrusion 2 and the front side of the guide plate body 1, and between the root of the rear protrusion 3 and the rear side of the guide plate body 1; specifically, a hemispherical structure is adopted at the top to avoid contact and cutting of the diaphragm 7, and the root chamfer is beneficial to alleviate the stress concentration of water flow.

[0051] like Figure 1 ,2 As shown, the radial spacing between any two adjacent circles of front convex points 2 is equal, and the radial spacing between any two adjacent circles of back convex points 3 is equal.

[0052] like Figures 1 to 4 As shown, the guide plate body 1 is provided with a connecting column 4 and a connecting hole 5 adapted to the connecting column 4;

[0053] Any one of the connection column 4 and the connection hole 5 is disposed on the front surface of the deflector body 1, and the other of the connection column 4 and the connection hole 5 is disposed on the reverse surface of the deflector body 1;

[0054] A channel 6 is further provided at the center of the deflector plate body 1 . In the present embodiment, the connection hole 5 is provided on the front surface of the deflector plate body 1 , and the connection column 4 is provided on the reverse surface of the deflector plate body 1 .

[0055] Embodiment 2

[0056] like Figure 3 , 4 As shown, a membrane assembly comprises at least two DTRO guide plates 100 as described in Example 1, wherein the DTRO guide plates 100 are stacked in sequence, and a diaphragm 7 is provided between adjacent DTRO guide plates 100, and the inner periphery of the diaphragm 7 is sealed and connected to the adjacent DTRO guide plates 100 through a sealing ring 8.

[0057] like Figure 3 , 4 As shown, the diaphragm 7 is located between the front protrusion 2 in one of the DTRO guide discs 100 and the back protrusion 3 in another adjacent DTRO guide disc 100, and the axial spacing D between the front protrusion 2 in one of the DTRO guide discs 100 and the back protrusion 3 in another adjacent DTRO guide disc 100 is 4 to 6 times the thickness of the diaphragm 7; in this embodiment, the axial spacing D is 5 times the thickness of the diaphragm 7. This design can ensure that the diaphragm 7 is not damaged by the strong squeezing of the front protrusion 2 and the back protrusion 3, and can also ensure smooth turbulence of the concentrated water on both sides of the diaphragm 7.

[0058] In summary, on the front side of the deflector plate body 1, the distribution spacing of the front protrusions 2 becomes smaller as it goes toward the outer circle, and the distribution spacing of the front protrusions 2 becomes larger as it goes toward the inner circle. Therefore, the closer to the outer end of the deflector plate body 1, the more the distribution of the front protrusions 2 is, the denser the distribution is, and the closer to the inner end of the deflector plate body 1, the fewer the distribution of the front protrusions 2 is, and the sparser the distribution is. Similarly, on the back side of the deflector plate body 1, the distribution spacing of the back protrusions 3 becomes smaller as it goes toward the outer circle, and the distribution spacing of the back protrusions 3 becomes larger as it goes toward the inner circle. Therefore, the closer to the outer end of the deflector plate body 1, the more the distribution of the back protrusions 3 is, the denser the distribution is, and the closer to the inner end of the deflector plate body 1, the fewer the distribution of the back protrusions 3 is, and the sparser the distribution is.

[0059] The front convex points 2 and the back convex points 3 are used to increase the turbulent kinetic energy of the concentrated water. When the concentrated water flows, it collides with the front convex points 2 and the back convex points 3 to form turbulence, thereby increasing the turbulent kinetic energy. Wherein, under the same flow rate, the denser the front convex points 2 and the back convex points 3 are distributed, the greater the turbulent kinetic energy generated by the collision of the concentrated water with the front convex points 2 and the back convex points 3.

[0060] When the DTRO guide plate of the embodiment of the present application is used in a membrane assembly, the guide plate body 1 and the diaphragms 7 are alternately stacked in sequence, and the concentrated water flows between the guide plate body 1 and the diaphragms 7; wherein, on the front side of the guide plate body 1, the concentrated water converges from the surroundings to the center, and on the back side of the guide plate body 1, the concentrated water diverges from the center to the surroundings. Since the area is smaller towards the inner side and larger towards the outer side, whether on the front or back side of the guide plate body 1, the concentrated water flow rate is smaller towards the outer side and faster towards the inner side.

[0061] The front convex points 2 and the back convex points 3 on the guide plate body 1 are distributed more densely toward the outside and more sparsely toward the inside. In the area close to the outside, the flow rate of the concentrated water is low and thus the kinetic energy of the concentrated water itself is small. When the concentrated water with a low flow rate collides with the densely distributed front convex points 2 and the back convex points 3, more turbulent kinetic energy is added, thereby making the concentrated water have sufficiently large turbulent kinetic energy in the outer area. In the area close to the inner side, the flow rate of the concentrated water is high, so the kinetic energy of the concentrated water itself is large. When the concentrated water with a high flow rate collides with the sparsely distributed front convex points 2 and the back convex points 3, the increased turbulent kinetic energy is small, but after combining with the kinetic energy of the concentrated water itself, it can also obtain a sufficiently large turbulent kinetic energy. Therefore, in the embodiment of the present application, the turbulent kinetic energy of the concentrated water in each area can be evenly distributed to the greatest extent, so that the surface of the diaphragm 7 is evenly flushed by the concentrated water; and the uniform distribution of the turbulent kinetic energy can make the scaling speed of each part of the diaphragm 7 tend to be uniform, avoiding the situation where the local scaling speed on the diaphragm 7 is too fast, thereby extending the cycle of chemical cleaning of the diaphragm 7 and extending the service life of the diaphragm 7. Among them, the size of the turbulent kinetic energy will affect the scaling speed on the diaphragm 7. When the turbulent kinetic energy in a certain area is larger, the scaling phenomenon on the diaphragm 7 in the area is milder. On the contrary, when the turbulent kinetic energy in a certain area is smaller, the scaling phenomenon on the diaphragm 7 in the area is more serious.

[0062] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A DTRO guide plate, characterized in that: It comprises a guide plate body (1); The front surface of the deflector plate body (1) is provided with a plurality of circles of front convex points (2) distributed in sequence in a concentric circle from the center of the deflector plate body (1) to the outside; In any two adjacent circles of front convex points (2), the distribution spacing of the outer circle of front convex points (2) is smaller than the distribution spacing of the inner circle of front convex points (2); The reverse side of the deflector plate body (1) is provided with a plurality of circles of reverse side convex points (3) which are sequentially distributed in a concentric circle from the center of the deflector plate body (1) to the outside; In any two adjacent circles of reverse convex points (3), the distribution spacing of the outer circle of reverse convex points (3) is smaller than the distribution spacing of the inner circle of reverse convex points (3).

2. The DTRO guide plate according to claim 1, characterized in that: The front convex points (2) in the same circle are evenly distributed at equal intervals along the circumference, and the back convex points (3) in the same circle are evenly distributed at equal intervals along the circumference.

3. The DTRO guide plate according to claim 1, characterized in that: The front convex dots (2) are provided with 11 circles, which are respectively, from the center to the outside, a first circle of front convex dots, a second circle of front convex dots, a third circle of front convex dots, a fourth circle of front convex dots, a fifth circle of front convex dots, a sixth circle of front convex dots, a seventh circle of front convex dots, an eighth circle of front convex dots, a ninth circle of front convex dots, a tenth circle of front convex dots and an eleventh circle of front convex dots; The distribution spacing of the first circle of front convex points is A1, the distribution spacing of the second circle of front convex points is A2, the distribution spacing of the third circle of front convex points is A3, the distribution spacing of the fourth circle of front convex points is A4, the distribution spacing of the fifth circle of front convex points is A5, the distribution spacing of the sixth circle of front convex points is A6, the distribution spacing of the seventh circle of front convex points is A7, the distribution spacing of the eighth circle of front convex points is A8, the distribution spacing of the ninth circle of front convex points is A9, the distribution spacing of the tenth circle of front convex points is A10, and the distribution spacing of the eleventh circle of front convex points is A11; among them, A1>A2>A3>A4>A5>A6>A7>A8>A9>A10>A11.

4. The DTRO guide plate according to claim 1, characterized in that: The reverse side convex points (3) are provided with 10 circles, which are respectively, from the center to the outside, a first circle of reverse side convex points, a second circle of reverse side convex points, a third circle of reverse side convex points, a fourth circle of reverse side convex points, a fifth circle of reverse side convex points, a sixth circle of reverse side convex points, a seventh circle of reverse side convex points, an eighth circle of reverse side convex points, a ninth circle of reverse side convex points and a tenth circle of reverse side convex points; The distribution spacing of the first circle of reverse convex points is B1, the distribution spacing of the second circle of reverse convex points is B2, the distribution spacing of the third circle of reverse convex points is B3, the distribution spacing of the fourth circle of reverse convex points is B4, the distribution spacing of the fifth circle of reverse convex points is B5, the distribution spacing of the sixth circle of reverse convex points is B6, the distribution spacing of the seventh circle of reverse convex points is B7, the distribution spacing of the eighth circle of reverse convex points is B8, the distribution spacing of the ninth circle of reverse convex points is B9, and the distribution spacing of the tenth circle of reverse convex points is B10; among them, B1>B2>B3>B4>B5>B6>B7>B8>B9>B10.

5. The DTRO guide plate according to claim 1, characterized in that: The root of the front convex point (2) is connected to the front side of the guide plate body (1), and the top of the front convex point (2) is a hemispherical structure; The root of the reverse side convex point (3) is connected to the reverse side of the guide plate body (1), and the top of the reverse side convex point (3) is a hemispherical structure.

6. The DTRO guide plate according to claim 5, characterized in that: Chamfers are provided between the root of the front convex point (2) and the front side of the deflector plate body (1), and between the root of the rear convex point (3) and the rear side of the deflector plate body (1).

7. The DTRO guide plate according to claim 1, characterized in that: The radial spacing between any two adjacent circles of front convex points (2) is equal; The radial spacing between any two adjacent circles of reverse convex points (3) is equal.

8. The DTRO guide plate according to claim 1, characterized in that: The deflector plate body (1) is provided with a connecting column (4) and a connecting hole (5) adapted to the connecting column (4); Any one of the connecting column (4) and the connecting hole (5) is arranged on the front surface of the deflector plate body (1), and the other of the connecting column (4) and the connecting hole (5) is arranged on the back surface of the deflector plate body (1); A channel (6) is also provided at the center of the guide plate body (1).

9. A membrane module, characterized in that: It comprises at least two DTRO guide plates (100) as described in any one of claims 1 to 8, wherein the DTRO guide plates (100) are stacked in sequence, and a diaphragm (7) is provided between adjacent DTRO guide plates (100), and the inner periphery of the diaphragm (7) is sealed and connected to the adjacent DTRO guide plates (100) through a sealing ring (8).

10. The membrane module according to claim 9, characterized in that The diaphragm (7) is located between the front convex point (2) in one of the DTRO guide discs (100) and the rear convex point (3) in another adjacent DTRO guide disc (100); An axial distance D between a front convex point (2) in one of the DTRO guide discs (100) and a rear convex point (3) in another adjacent DTRO guide disc (100) is 4 to 6 times the thickness of the diaphragm (7).

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