Adapted installation structure and method of spiral-wound reverse osmosis membrane and disc-and-tube reverse osmosis membrane shell

Abstract

The application discloses a kind of roll type reverse osmosis membrane and the compatible installation structure of disc tube type reverse osmosis membrane shell, including including membrane shell, upper pressure flange, lower pressure flange and center pull rod, and upper support sleeve, lower support sleeve, several membrane elements and center water production pipe being set in membrane shell 1 inside, the socket and flow channel in the inside of upper and lower support sleeve are used to connect the membrane element, under the premise of not reforming original DTRO membrane shell, sealing accessory, cleverly utilize the center pull rod compression structure of membrane shell itself, realize the tension sealing of roll type reverse osmosis membrane element and support sleeve, center water production pipe, solve the problem that two incompatible membrane elements cannot be used universally, avoid equipment idle, especially suitable for low concentration wastewater treatment or pilot experiment and other high cost-effective application scenarios.

Description

Technical Field

[0001] This invention relates to the field of water treatment equipment, and more particularly to an adaptive installation structure and method for installing spiral wound reverse osmosis membrane elements inside disc tube reverse osmosis membrane housings. Background Technology

[0002] In the field of water treatment, spiral wound reverse osmosis membranes are typically used with standard fiberglass membrane housings, relying on end caps and sealing rings to achieve axial sealing. Disc tube reverse osmosis (DTRO) membranes, on the other hand, are mainly used for treating high-concentration wastewater such as landfill leachate. They have a larger internal diameter (typically 200–224 mm) and house disc tube membrane modules composed of stacked guide plates and membrane sheets. Internal sealing is achieved through axial compression by a central tie rod, and the fluid flows through the guide plates to form radial channels.

[0003] The two types of membrane modules mentioned above are structurally incompatible, specifically in the following aspects: Significant size differences: For example, the outer diameter of a 2540 spiral wound reverse osmosis membrane element is about 61mm, while the inner diameter of a DTRO membrane housing is over 200mm. Direct installation would create a huge annular gap, making it impossible to establish an effective seal.

[0004] The sealing methods are different: spiral wound reverse osmosis membranes rely on the axial compression of the sealing ring at the end cap for sealing; while DTRO membranes achieve internal sealing by pressing the guide plate with a pull rod.

[0005] Fluid flow channel mismatch: For spiral wound reverse osmosis membranes, the feed, permeate, and concentrate interfaces are located at both ends of the membrane element, while for DTRO membranes, the feed, permeate, and concentrate interfaces are concentrated at one end (e.g., ...). Figure 11 (As shown).

[0006] DTRO equipment is feature-rich but has a high procurement cost. When users need to treat low-concentration wastewater or conduct small-scale experiments using spiral-wound reverse osmosis membranes, they cannot directly and cost-effectively install these membranes into idle DTRO membrane housings. This results in wasted equipment or high operating costs. Therefore, there is an urgent need for an adapter structure that allows standard reverse osmosis membrane elements to be adapted to DTRO membrane housings, thereby reducing costs and improving the versatility of membrane housings. Summary of the Invention

[0007] To overcome the above deficiencies, the present invention provides an adaptable installation structure for installing spiral wound reverse osmosis membrane elements inside disc tube reverse osmosis membrane housings, which improves the versatility of reverse osmosis equipment, reduces operating costs, and is convenient to install and has reliable sealing.

[0008] This invention is achieved through the following technical solution: The compatibility installation structure between spiral wound reverse osmosis membranes and disc tube reverse osmosis membrane housings includes the original DTRO equipment's membrane housing, upper pressure flange, lower pressure flange, and central tie rod, and also includes: A central water production pipe is sleeved on a central tie rod, with both ends of the central water production pipe pressed against a pressure-bearing flange, and a connecting sleeve fixed to the upper end of the central water production pipe. Several reverse osmosis membrane elements are evenly distributed circumferentially around the central product water pipe; The upper support sleeve and the lower support sleeve are both sleeved on the central permeate pipe. The membrane element is connected between the upper support sleeve and the lower support sleeve. The top of the upper support sleeve abuts against the connecting pipe sleeve. The permeate pipe of the membrane element is connected to the central permeate pipe through the connecting pipe sleeve. The top of the upper support sleeve has a drain port. The concentrate end of the membrane element is connected to the inside of the membrane shell through the drain port. The bottom of the lower support sleeve abuts against the lower pressure flange. Two pressure-bearing flanges are tightened to the sealing membrane element and two support sleeves by a central tie rod and installed inside the membrane housing. The lower pressure-bearing flange is provided with an inlet pipe, a concentrate pipe and an outlet sleeve. The inlet pipe is connected to the lower support sleeve, the concentrate pipe is connected to the internal space of the membrane housing, and the outlet sleeve is fitted on the central tie rod and connected to the central product water pipe.

[0009] In a further optimized manner, the concentrate end and the feed end of several of the membrane elements are connected in series.

[0010] In a further optimized configuration, the membrane element is provided with 5 supports, and 5 sockets are provided on both the upper and lower support sleeves, into which the membrane element is inserted.

[0011] In a further optimized configuration, one of the five sockets on the upper support sleeve is a concentrate outlet socket, and the drain outlet is located on the concentrate outlet socket. The concentrate outlet socket is connected to the inside of the membrane housing through the drain outlet. The remaining four sockets are divided into two groups, with two adjacent sockets forming one group. The two sockets in each group are connected through a flow channel.

[0012] Further optimized, one of the five sockets on the lower support sleeve is a raw water inlet socket, with an inlet at the bottom. The water inlet pipe is connected to the raw water inlet socket through the inlet. The remaining four sockets are divided into two groups, with two adjacent sockets forming one group. The two sockets in each group are connected through a flow channel.

[0013] In a further optimized configuration, the raw water inlet socket is connected to the inlet end of a membrane element, the concentrate outlet socket is connected to the concentrate end of a membrane element, and the other three membrane elements are sequentially inserted between the upper and lower support sleeves in alternating directions, thereby achieving a series connection of five membrane elements from the raw water inlet socket to the concentrate outlet socket.

[0014] Further optimized, the top of the upper support sleeve is provided with a through hole corresponding to the socket, and five connecting bends are fixed on the side wall of the connecting sleeve. One end of the connecting bend is pressed against the through hole, and the water production pipe of the membrane element is connected to the central water production pipe through the connecting bend and the connecting sleeve.

[0015] Further optimized, the outer diameters of the upper and lower support sleeves are adapted to the inner diameter of the membrane housing, and vertical arc-shaped flow channels are opened on the outer walls of the two support sleeves. A spacer is provided between the lower support sleeve and the lower pressure flange, and the spacer is also fitted on the central permeate pipe. The spacer is used to leave a channel for concentrated water to flow from the inside of the membrane housing to the concentrated water pipe.

[0016] Further optimized, the upper support sleeve and the lower support sleeve are made of 304 stainless steel or PVC.

[0017] A further optimized method for adapting and installing spiral wound reverse osmosis membranes and disc tube reverse osmosis membrane housings is characterized by comprising the following steps: A. First, install the original lower pressure flange and central tie rod of the original disc tube reverse osmosis equipment membrane housing according to the original requirements. Then, install the original lower inlet plate (spacer plate) and lower support sleeve through the central tie rod and lower pressure flange. B. Install the seals inside the lower support sleeve and the upper support sleeve. Then, install the membrane element into the socket of the lower support sleeve in sequence, and then install the upper support sleeve on the membrane element, so that the two ends of the membrane element are aligned with the positioning steps in the socket. When installing the membrane element, pay attention to the water flow direction of the membrane element. C. Install the seal on the central permeate pipe, then pass the central permeate pipe through the upper support sleeve and insert it between the central tie rod and the membrane element. At the same time, adjust the position of the connecting bend and insert it into the through hole at the top of the upper support sleeve. D. Install the original upper pressure flange and nuts, and tighten them according to the specified torque to achieve a tension seal between the upper support sleeve, lower support sleeve, membrane element, and central product water pipe; E. Install the assembled structure into the membrane housing of the original disc tube reverse osmosis equipment.

[0018] The beneficial effects of this invention are: This invention achieves compatibility between DTRO membrane housings and two types of membrane elements, improving equipment versatility. Through a structural design of "ring-integrated multiple small-sized spiral-wound membrane elements" and "centering and guiding by upper and lower support sleeves," it cleverly utilizes the membrane housing's inherent central tie rod clamping structure to achieve a tight seal between the spiral-wound reverse osmosis membrane element, the support sleeve, and the central permeate pipe, without modifying the original DTRO membrane housing or sealing accessories. This solves the problem of incompatibility between two types of membrane elements, avoids equipment downtime, and is particularly suitable for cost-effective applications such as low-concentration wastewater treatment or pilot-scale experiments.

[0019] This invention connects membrane elements in series through sockets and flow channels inside the upper and lower support sleeves. The inlet and outlet ports of the pressure-bearing flange under the original membrane housing and the DTRO pump unit can provide the required inlet water pressure for the spiral wound reverse osmosis membrane elements.

[0020] This invention is easy to install, can be repeatedly disassembled and reassembled, and its structural design supports non-destructive disassembly, facilitating membrane element replacement and equipment maintenance, and resulting in a high reusability rate. This invention transforms DTRO equipment, originally designed for high-concentration wastewater treatment, into a multi-functional treatment platform that allows for flexible selection of different membrane elements according to needs, significantly enhancing the utilization value of idle DTRO equipment. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a three-dimensional structural diagram of the membrane shell before it is installed in this invention.

[0023] Figure 3 This is a schematic diagram of the installation of various structures inside the membrane shell of the present invention.

[0024] Figure 4 This is a three-dimensional structural diagram of the lower pressure-bearing flange in this invention.

[0025] Figure 5 This is a three-dimensional structural diagram of the central water production pipe in this invention.

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the lower support sleeve of the present invention. Figure 1 .

[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of the lower support sleeve of the present invention. Figure 2 .

[0028] Figure 8 This is a schematic diagram of the three-dimensional structure of the support sleeve of the present invention. Figure 1 .

[0029] Figure 9 This is a schematic diagram of the three-dimensional structure of the lower support sleeve of the present invention. Figure 2 .

[0030] Figure 10 This is a cross-sectional schematic diagram of the present invention.

[0031] Figure 11 This is a schematic diagram showing the flow direction of the spiral wound reverse osmosis membrane device, the disc tube reverse osmosis membrane device, and the device of the present invention mentioned in the background art.

[0032] In the diagram: 1. Membrane housing; 2. Central tie rod; 21. Nut; 3. Upper pressure flange; 4. Lower pressure flange; 41. Inlet pipe; 42. Outlet sleeve; 43. Concentrate pipe; 44. Spacer plate; 45. Concentrate outlet; 5. Upper support sleeve; 53. Concentrate outlet socket; 54. Drain outlet; 55. Through hole; 56. Socket; 561. Flow channel; 6. Lower support sleeve; 63. Raw water inlet socket; 64. Inlet; 7. Membrane element; 8. Central permeate pipe; 81. Connecting sleeve; 82. Connecting bend; 9. Arc-shaped flow channel. Detailed Implementation

[0033] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. In the description of this invention, it should be noted that the terms "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0034] like Figures 1-11 As shown, the present invention provides an adaptation installation structure for spiral wound reverse osmosis membranes and disc tube reverse osmosis membrane housings, including a membrane housing 1, an upper pressure-bearing flange 3, a lower pressure-bearing flange 4 and a central tie rod 2, as well as an upper support sleeve 5, a lower support sleeve 6, several membrane elements 7 and a central permeate pipe 8 disposed inside the membrane housing 1.

[0035] In this embodiment, membrane element 7 is selected from five standard 2540 spiral wound reverse osmosis membrane elements (approximately 61 mm in diameter and 1016 mm in length). Membrane housing 1, upper pressure flange 3, lower pressure flange 4, and central tie rod are standard membrane housings and accessories from existing DTRO equipment. The two ends of the central tie rod pass through the upper pressure flange 3 and lower pressure flange 4 respectively and are locked with nuts to provide axial clamping force, pressing and sealing the membrane element, central permeate pipe, upper support sleeve 5, and lower support sleeve 6. The outer diameters of the upper support sleeve 5 and lower support sleeve 6 are adapted to the inner diameter of the membrane housing 1, allowing the entire integrated core to be stably placed into the membrane housing 1 without any structural modifications to the membrane housing 1 and its locking mechanism. This truly achieves compatibility of the DTRO membrane housing with two different membrane systems and improves the equipment's versatility.

[0036] Five membrane elements 7 are evenly distributed circumferentially around the central permeate pipe 8. Five sockets matching the shape of the ends of the membrane elements 7 are each provided on the upper support sleeve 5 and the lower support sleeve 6. The two ends of the membrane elements 7 are inserted into the corresponding upper and lower sockets. The sockets are equipped with suitable positioning steps and seals to ensure axial positioning and radial pressure sealing of the membrane element 7 ends. The entire system adopts a modular socket connection installation method, making the assembly and disassembly of the membrane elements more convenient.

[0037] Furthermore, this embodiment achieves the sequential series connection of five membrane elements 7 through the pre-set flow channels 561 inside the upper and lower support sleeves. During series connection, it ensures that the inlet and outlet ports of the pressure-bearing flange under the original membrane housing and the DTRO pump unit provide the required feed water pressure to the spiral wound reverse osmosis membrane elements. The specific flow path layout is as follows: Of the five sockets on the lower support sleeve 6, one is a raw water inlet socket 63, which has an inlet 64 at its bottom that is connected to the water inlet pipe 41. The other four sockets 56 are divided into two groups, with two adjacent sockets forming one group. The two sockets in each group are connected by a flow channel 561 opened inside the lower support sleeve 6.

[0038] Of the five sockets on the upper support sleeve 5, one is a concentrate outlet socket 53, which has a drain port 54 that communicates with the internal space of the membrane housing 1. The other four sockets 56 are also divided into two groups, with two adjacent sockets forming one group. The two sockets in each group are connected by a flow channel 561 opened inside the upper support sleeve 5.

[0039] During operation, the raw water inlet socket 63 is connected to the inlet end of the first membrane element 7. The concentrate end of this membrane element is inserted into a socket in the corresponding group of the upper support sleeve 5, flows through the internal channel into another socket in the same group, and then flows into the second membrane element 7. The concentrate end of the second membrane element is inserted into a socket in the lower support sleeve 6, and then flows back. In this manner, the five membrane elements 7 are arranged alternately in forward and reverse directions, and finally the concentrate end of the fifth membrane element 7 is connected to the concentrate outlet socket 53, forming a complete series flow path from the raw water inlet socket 63 to the concentrate outlet socket 53.

[0040] This design, which integrates multiple membrane series flow channels inside the support sleeve, achieves a highly integrated structure and reliable sealing under axial tension.

[0041] The central permeate pipe 8 is fitted onto the central tie rod 2, with its two ends abutting against the upper pressure flange 3 and the lower pressure flange 4, respectively, forming a sealed fit. A connecting sleeve 81 is fixed to the upper end of the central permeate pipe 8, and five connecting elbows 82 are fixed to the side wall of the connecting sleeve 81. The top of the upper support sleeve 5 has through holes 55 corresponding to the positions of each socket. One end of each connecting elbow 82 abuts against the through hole 55, and the permeate pipe of the membrane element also abuts against the through hole 55 in the socket, forming a sealed fit. Thus, the purified water produced by each membrane element 7 enters the central permeate pipe 8 through the through holes, connecting elbows 82, and connecting sleeve 81, and is transported downwards, finally exiting through the outlet sleeve 42 at the bottom of the lower pressure flange.

[0042] The concentrated water discharge path design makes full use of the internal space of the membrane housing 1. A drain port 54 is provided at the top of the upper support sleeve 5, through which the concentrated water from the end of the series flow path is discharged into the inner cavity of the membrane housing 1. Vertical arc-shaped flow channels 9 are provided on the outer walls of both the upper support sleeve 5 and the lower support sleeve 6, through which the concentrated water flows downward within the membrane housing 1. A spacer plate 44 is provided between the lower support sleeve 6 and the lower pressure flange 4, and the spacer plate 44 is also fitted onto the central permeate pipe 8, such as... Figure 2 , 4 As shown, its thickness and structural design provide a smooth channel for the convergence of the concentrate outlet 45 on the downward pressure flange 4 and the concentrate pipe 43. It should be noted that the spacer plate 44 is the lower outlet plate inside the original butterfly reverse osmosis membrane housing. Correspondingly, after installing the integrated core of the spiral wound reverse osmosis membrane into the original butterfly reverse osmosis membrane housing, the inlet and concentrate pipes of the original DTRO membrane housing need to be interchanged. That is, the inlet pipe of the original DTRO membrane housing becomes the current concentrate pipe, and the concentrate pipe of the original DTRO membrane housing becomes the current inlet pipe (e.g., ...). Figure 11 (As shown).

[0043] Furthermore, during operation, raw water enters through the inlet pipe 41 on the lower pressure flange 4, flows through the inlet 64 into the raw water inlet socket 63, and flows sequentially through the five membrane elements 7 for staged concentration according to the aforementioned series path. Permeate is collected and discharged through the central permeate pipe 8 and the outlet sleeve 42. Finally, concentrated water enters the inner cavity of the membrane housing 1 through the drain port 54, flows downward through the arc-shaped flow channel 9, and exits through the concentrated water outlet 45 on one side of the bottom of the spacer plate 44 into the concentrated water pipe 43.

[0044] This device ingeniously reuses the original DTRO membrane housing's central tie rod, pressure-bearing flange, membrane housing, and other clamping systems and pressure-bearing structures. By tightening the nuts 21 at both ends of the central tie rod 2, the axial clamping force is applied sequentially to the upper pressure-bearing flange 3, the connecting pipe sleeve 81, the upper support sleeve 5, all membrane elements 7, the lower support sleeve 6, the spacer 44, and the lower pressure-bearing flange 4. This achieves dual protection of internal sealing of the membrane elements and overall sealing of the membrane housing, enabling it to withstand high-pressure operation and providing extremely high sealing reliability.

[0045] The upper support sleeve 5 and the lower support sleeve 6 can be made of corrosion-resistant materials such as 304 stainless steel or PVC, which provides better adaptability.

[0046] The installation method in this embodiment is simple and efficient. The specific steps are as follows: A. First, install the lower pressure flange and central tie rod of the original DTRO equipment membrane housing according to the original requirements. Then, install the original lower inlet plate (spacer plate) and lower support sleeve through the central tie rod and lower pressure flange.

[0047] B. Install the seals inside the lower support sleeve and the upper support sleeve. The seals include the connecting pipe 46 and various sealing gaskets, sealing rings, etc. Then, install the membrane element into the socket of the lower support sleeve in sequence, and then install the upper support sleeve on the membrane element so that the two ends of the membrane element are aligned with the positioning steps in the socket. When installing the membrane element, pay attention to the water flow direction and the forward and reverse arrangement of the membrane element.

[0048] C. Install the seal on the central permeate pipe, then insert the central permeate pipe through the upper support sleeve between the central tie rod and the membrane element, and at the same time adjust the position of the connecting bend so that it is accurately inserted into the through hole 55 at the top of the upper support sleeve; D. Install the original upper pressure flange and nuts, and tighten them according to the specified torque to achieve a tension seal between the upper support sleeve, lower support sleeve, membrane element, and central product water pipe; E. Install the assembled core into the membrane housing of the original disc tube reverse osmosis equipment, and connect the external pipeline to put it into operation.

[0049] Through the above structure and method, the DTRO equipment originally used for high-concentration wastewater treatment can be directly installed with 2540 spiral wound reverse osmosis membrane elements without any structural modifications. Under the premise of matching the influent flow rate with the original unit pump set, the equipment can be flexibly applied to various scenarios such as low-concentration wastewater treatment, material separation or pilot-scale experiments, reducing consumable costs and procurement expenses, and significantly improving the utilization value of idle DTRO equipment.

[0050] All aspects not detailed herein are well-known to those skilled in the art. Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of this invention and not intended to limit it. Although the invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this invention without departing from the spirit and scope of the invention, and all such modifications and substitutions should be covered within the scope of the claims of this invention.

Claims

1. A compatible installation structure for spiral wound reverse osmosis membranes and disc tube reverse osmosis membrane housings, comprising a membrane housing, an upper pressure-bearing flange, a lower pressure-bearing flange, and a central tie rod, characterized in that, Also includes: A central water production pipe is sleeved on a central tie rod, with both ends of the central water production pipe pressed against a pressure-bearing flange, and a connecting sleeve fixed to the upper end of the central water production pipe. Several reverse osmosis membrane elements are evenly distributed circumferentially around the central product water pipe; The upper support sleeve and the lower support sleeve are both sleeved on the central permeate pipe. The membrane element is connected between the upper support sleeve and the lower support sleeve. The top of the upper support sleeve abuts against the connecting pipe sleeve. The permeate pipe of the membrane element is connected to the central permeate pipe through the connecting pipe sleeve. The top of the upper support sleeve has a drain port. The concentrate end of the membrane element is connected to the inside of the membrane shell through the drain port. The bottom of the lower support sleeve abuts against the lower pressure flange. Two pressure-bearing flanges are tightened to the sealing membrane element and two support sleeves by a central tie rod and installed inside the membrane housing. The lower pressure-bearing flange is provided with an inlet pipe, a concentrate pipe and an outlet sleeve. The inlet pipe is connected to the lower support sleeve, the concentrate pipe is connected to the internal space of the membrane housing, and the outlet sleeve is fitted on the central tie rod and connected to the central product water pipe.

2. The adapter installation structure for spiral wound reverse osmosis membrane and disc tube reverse osmosis membrane housing according to claim 1, characterized in that: The concentrate end and the feed end of several membrane elements are connected in series.

3. The adaptive installation structure for spiral wound reverse osmosis membrane and disc tube reverse osmosis membrane housing according to claim 2, characterized in that: The membrane element is provided with 5 pieces, and 5 sockets are opened on both the upper support sleeve and the lower support sleeve. The membrane element is inserted into the socket.

4. The adapter installation structure for spiral wound reverse osmosis membrane and disc tube reverse osmosis membrane housing according to claim 3, characterized in that: One of the five sockets on the upper support sleeve is a concentrate outlet socket. The drain outlet is located on the concentrate outlet socket and is connected to the inside of the membrane housing through the drain outlet. The other four sockets are divided into two groups, with two adjacent sockets forming one group. The two sockets in each group are connected through a flow channel.

5. The adapter installation structure for spiral wound reverse osmosis membrane and disc tube reverse osmosis membrane housing according to claim 4, characterized in that: One of the five sockets on the lower support sleeve is a raw water inlet socket. The raw water inlet socket has an inlet at its bottom. The water inlet pipe is connected to the raw water inlet socket through the inlet. The other four sockets are divided into two groups, with two adjacent sockets forming one group. The two sockets in each group are connected by a flow channel.

6. The adapter installation structure for spiral wound reverse osmosis membrane and disc tube reverse osmosis membrane housing according to claim 5, characterized in that: The raw water inlet socket is connected to the inlet end of a membrane element, and the concentrate outlet socket is connected to the concentrate end of a membrane element. The other three membrane elements are inserted between the upper support sleeve and the lower support sleeve in a sequential, alternating forward and reverse direction, so that the five membrane elements are connected in series from the raw water inlet socket to the concentrate outlet socket.

7. The adaptive installation structure for spiral wound reverse osmosis membrane and disc tube reverse osmosis membrane housing according to claim 3, characterized in that: The top of the upper support sleeve has a through hole corresponding to the socket. Five connecting bends are fixed on the side wall of the connecting sleeve. One end of the connecting bend is pressed against the through hole. The water production pipe of the membrane element is connected to the central water production pipe through the connecting bend and the connecting sleeve.

8. The adaptive installation structure for spiral wound reverse osmosis membrane and disc tube reverse osmosis membrane housing according to claim 1, characterized in that: The outer diameters of the upper and lower support sleeves are adapted to the inner diameter of the membrane housing. Vertical arc-shaped flow channels are provided on the outer walls of the two support sleeves. A spacer is provided between the lower support sleeve and the lower pressure flange. The spacer is also fitted on the central permeate pipe. The spacer is used to leave a channel for the concentrate to flow from inside the membrane housing to the concentrate pipe.

9. The adaptive installation structure for spiral wound reverse osmosis membrane and disc tube reverse osmosis membrane housing according to claim 1, characterized in that: The upper and lower support sleeves are made of 304 stainless steel or PVC.

10. A method for adapting and installing spiral wound reverse osmosis membranes and disc tube reverse osmosis membrane housings, characterized in that, Includes the following steps: A. First, install the original lower pressure flange and central tie rod of the original disc tube reverse osmosis equipment membrane housing according to the original requirements. Then, install the original lower inlet plate (spacer plate) and lower support sleeve through the central tie rod and lower pressure flange. B. Install the seals inside the lower support sleeve and the upper support sleeve. Then, install the membrane element into the socket of the lower support sleeve in sequence, and then install the upper support sleeve on the membrane element, so that the two ends of the membrane element are aligned with the positioning steps in the socket. When installing the membrane element, pay attention to the water flow direction of the membrane element. C. Install the seal on the central permeate pipe, then pass the central permeate pipe through the upper support sleeve and insert it between the central tie rod and the membrane element. At the same time, adjust the position of the connecting bend and insert it into the through hole at the top of the upper support sleeve. D. Install the original upper pressure flange and nuts, and tighten them according to the specified torque to achieve a tension seal between the upper support sleeve, lower support sleeve, membrane element, and central product water pipe; E. Install the assembled structure into the membrane housing of the original disc tube reverse osmosis equipment.

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