Spiral-wound membrane element structure for improving water yield

Abstract

The utility model discloses a spiral-wound membrane element structure capable of improving water yield, which relates to the technical field of spiral-wound membrane elements and comprises a central water collecting pipe, an external thread is arranged on the outer surface of one end of the central water collecting pipe, one end of the central water collecting pipe is rotatably connected with an end cover, an internal thread is arranged inside the end cover, and the central water collecting pipe is connected with a spiral-wound membrane. The end cover is connected with the central water collecting pipe through the internal thread and the external thread, the left side of the end cover is connected with a supporting pipeline, an impeller is installed in the supporting pipeline, the impeller, a sliding groove, a sliding block and a filter screen are arranged, the impeller is started, and water enters the supporting pipeline through a water inlet pipeline; the filter screen can filter large-particle impurities and suspended solids in water to prevent the impurities from entering the membrane element, pollution and blockage of the membrane and the filter screen can be reduced, the impeller is started, rotation of the impeller can increase the flowing intensity of water flow and reduce the concentration polarization phenomenon, and the filtering efficiency and the water yield of the membrane element are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of spiral wound membrane elements, and particularly relates to a structure of a spiral wound membrane element for improving water recovery rate. Background Technique

[0002] The spiral wound membrane element is the most widely used membrane application form in the market. Its main advantages are high packing density, simple operation, and relatively consistent industry standards. The spiral wound membrane element is widely used in various industrial material separation, purification processes, reclaimed water reuse, seawater desalination and other fields.

[0003] There is a prior structure of a spiral wound membrane element for improving water recovery rate with the Chinese patent application number CN202022421828.8, belonging to the technical field of water purification filtration. It includes a central water collecting pipe. A plurality of uniformly distributed liquid passing channels are opened on the pipe wall of the central water collecting pipe. A first water inlet spacer and a first spiral wound membrane bag are arranged on the pipe wall of the central water collecting pipe. A second water inlet spacer and a third water inlet spacer are arranged below the first water inlet spacer and the first spiral wound membrane bag. A second spiral wound membrane bag is arranged between the second water inlet spacer and the third water inlet spacer. The first water inlet spacer, the first spiral wound membrane bag, the second spiral wound membrane bag, the second water inlet spacer and the third water inlet spacer are all wound around the central water collecting pipe in the clockwise direction. For this utility model, it can improve the flow velocity of the raw water, alleviate the concentration polarization phenomenon on the concentrated water side in the raw water flow channel, at the same time, it also reduces the resistance of the produced water flowing in the reverse osmosis membrane sheet, improves the water production efficiency of the filter element, and also extends the service life of the filter element. However, this device still has disadvantages.

[0004] This device does not have a preliminary filtration structure at the water inlet, so that impurities such as organic matters, suspended solids, and colloids contained in the raw water enter the interior of the membrane element, causing the impurities to adhere to the membrane sheet and the spacer, resulting in the blockage of the membrane sheet and the spacer, and affecting the water recovery rate.

[0005] Therefore, we propose a structure of a spiral wound membrane element for improving water recovery rate to solve the problems raised above. Content of the Utility Model

[0006] The purpose of the utility model is to provide a structure of a spiral wound membrane element for improving water recovery rate, so as to solve the problem that the prior device does not have a preliminary filtration structure at the water inlet, so that impurities such as organic matters, suspended solids, and colloids contained in the raw water enter the interior of the membrane element, causing the impurities to adhere to the membrane sheet and the spacer, resulting in the blockage of the membrane sheet and the spacer, and affecting the water recovery rate as mentioned in the above background technique.

[0007] To achieve the above object, the present utility model provides the following technical solution: A spiral wound membrane element structure for improving water recovery rate, including a central collecting pipe, an external thread is provided on the outer surface of one end of the central collecting pipe, and an end cap is rotatably connected to one end of the central collecting pipe. An internal thread is provided inside the end cap, and the end cap and the central collecting pipe are connected through the internal thread and the external thread. A support pipe is connected to the left side of the end cap, and an impeller is installed inside the support pipe. A chute is opened inside the support pipe, and a slider is slidably connected inside the chute, and a filter screen is fixedly connected to the bottom of the slider.

[0008] The central collecting pipe and the end cap are connected through the external thread and the internal thread, realizing the tight connection between the central collecting pipe and the end cap. This connection method is both firm and convenient for disassembly and maintenance.

[0009] Preferably, a limiting groove is opened at one end of the slider, and a cavity is opened inside the support pipe. A limiting rod is slidably connected inside the cavity, and a tension spring is fixedly connected between the cavity and the limiting rod.

[0010] By adopting the above technical solution, by pulling the limiting rod, the slider is slidably connected with the chute. Loosen the limiting rod, and the limiting rod is reset under the action of the tension spring, so that the limiting rod is engaged with the limiting groove at the slider, thereby achieving convenient and rapid installation and disassembly of the filter screen and facilitating the cleaning of the filter screen in the later stage.

[0011] Preferably, a diversion groove is opened inside the central collecting pipe.

[0012] By adopting the above technical solution, through the setting of the diversion groove, the flow resistance of the water flow inside the membrane element can be reduced, enabling the fluid to pass through the membrane element more smoothly, thereby improving the water recovery rate.

[0013] Preferably, water seepage holes are opened at the top of the diversion groove.

[0014] By adopting the above technical solution, since the water seepage holes are evenly distributed along the axial direction of the central collecting pipe, it helps to collect the permeate passing through the membrane sheet more evenly.

[0015] Preferably, a water inlet spacer is connected to the outer surface of the central collecting pipe, and an adhesive is provided on the outer surface of the water inlet spacer.

[0016] By adopting the above technical solution, the water inlet spacer is used to preliminarily filter the water flow entering the inside of the membrane element, and the water inlet spacer and the central collecting pipe are connected through an adhesive.

[0017] Preferably, a membrane sheet is connected to the outer surface of the adhesive, and a water production spacer is connected to the outside of the membrane sheet through an adhesive.

[0018] With the above technical solution, the diaphragm is fixed on the central water collecting pipe through the inlet water separation net by means of an adhesive. The diaphragm is the core of the filtration system and is responsible for removing impurities and pollutants in the water. The water production separation net is used to protect the diaphragm and collect the filtered clear water.

[0019] Compared with the prior art, the beneficial effect of the present utility model is: the spiral wound membrane element structure for improving the water recovery rate;

[0020] 1. By providing the impeller, chute, slider and filter screen, when the impeller is started, water enters the support pipe through the inlet pipe. The filter screen can filter large particulate impurities and suspended matters in the water quality, preventing these impurities from entering the interior of the membrane element, which can reduce the pollution and blockage of the diaphragm and the separation net. When the impeller is started, the rotation of the impeller can increase the flow intensity of the water flow, reduce the concentration polarization phenomenon, and further improve the filtration efficiency and water recovery rate of the membrane element;

[0021] 2. By providing the diversion groove, water seepage holes, inlet water separation net, adhesive, diaphragm and water production separation net, diversion grooves are uniformly arranged inside the central water collecting pipe, and water seepage holes are opened at the top of the diversion grooves. The water seepage holes are uniformly distributed along the axial direction of the central water collecting pipe, which can reduce the flow resistance of the water flow. And the water flow enters the inlet water separation net through the water seepage holes for preliminary filtration. After the preliminarily filtered water enters the diaphragm, impurities and pollutants in the water are removed. The filtered clear water is collected through the water production separation net, thus realizing the effective filtration and collection of water. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the front sectional structure schematic diagram of the present utility model;

[0023] Figure 2 is of the present utility model Figure 1 the enlarged structure schematic diagram at A in;

[0024] Figure 3 is of the present utility model Figure 1 the enlarged structure schematic diagram at B in;

[0025] Figure 4 is the partial sectional structure schematic diagram of the present utility model;

[0026] Figure 5 is the front sectional structure schematic diagram of the support pipe of the present utility model

[0027] In the figure: 1, central water collecting pipe; 2, external thread; 3, internal thread; 4, end cover; 5, support pipe; 6, impeller; 7, chute; 8, slider; 9, filter screen; 10, limiting groove; 11, cavity; 12, limiting rod; 13, tension spring; 14, diversion groove; 15, water seepage hole; 16, inlet water separation net; 17, adhesive; 18, diaphragm; 19, water production separation net. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-5 , the present invention provides a technical solution: a spiral wound membrane element structure for improving water recovery rate, including a central collecting pipe 1. An external thread 2 is provided on the outer surface of one end of the central collecting pipe 1, and an end cap 4 is rotatably connected to one end of the central collecting pipe 1. An internal thread 3 is provided inside the end cap 4, and the end cap 4 is connected to the central collecting pipe 1 through the internal thread 3 and the external thread 2. A support pipe 5 is connected to the left side of the end cap 4, and an impeller 6 is installed inside the support pipe 5. A chute 7 is provided inside the support pipe 5, and a slider 8 is slidably connected inside the chute 7. And the bottom of the slider 8 is fixedly connected with a filter screen 9. Starting the impeller 6 is used to promote the flow of water or mixed fluid. When the water flow passes through the support pipe 5, the filter screen 9 can preliminarily filter the impurities in the water flow. And there are water permeable holes inside the end cap 4. The preliminarily filtered water flow can enter the inside of the central collecting pipe 1 through the support pipe 5.

[0030] A limiting groove 10 is provided at one end of the slider 8, and a cavity 11 is provided inside the support pipe 5. A limiting rod 12 is slidably connected inside the cavity 11, and a tension spring 13 is fixedly connected between the cavity 11 and the limiting rod 12. Pulling the limiting rod 12 makes the slider 8 slidably connected with the chute 7. Loosening the limiting rod 12, the limiting rod 12 is reset under the action of the tension spring 13, so that the limiting rod 12 is engaged with the limiting groove 10 at the slider 8, so as to achieve the convenience of quickly installing and disassembling the filter screen 9 and facilitating the cleaning of the filter screen 9 in the later stage.

[0031] A diversion groove 14 is provided inside the central collecting pipe 1, and a water seepage hole 15 is provided at the top of the diversion groove 14. An inlet separation net 16 is connected to the outer surface of the central collecting pipe 1, and an adhesive 17 is provided on the outer surface of the inlet separation net 16. A membrane sheet 18 is connected to the outer surface of the adhesive 17, and a product water separation net 19 is connected to the outside of the membrane sheet 18 through the adhesive 17. The setting of the diversion groove 14 can reduce the flow resistance of the water flow inside the membrane element. The water seepage holes 15 are evenly distributed along the axial direction of the central collecting pipe 1. The inlet separation net 16 is used to preliminarily filter the water flow entering the inside of the membrane element. After the filtered water enters the membrane sheet 18, the impurities and pollutants in the water are removed. The filtered clear water is collected through the product water separation net 19.

[0032] Working principle: When using the spiral wound membrane element structure for improving water recovery rate, water enters the support pipe 5 through the inlet pipe. The filter screen 9 can filter large particle impurities and suspended matters in the water quality to prevent these impurities from entering the interior of the membrane element, which can reduce the pollution and blockage of the membrane sheet 18 and the spacer mesh. Start the impeller 6. The rotation of the impeller 6 can increase the flow intensity of the water flow, reduce the concentration polarization phenomenon, and further improve the filtration efficiency and water recovery rate of the membrane element. The interior of the central collecting pipe 1 is evenly provided with diversion grooves 14, and water seepage holes 15 are opened at the top of the diversion grooves 14. The water seepage holes 15 are evenly distributed along the axial direction of the central collecting pipe 1, which can reduce the flow resistance of the water flow. And the water flow enters the inlet spacer mesh 16 through the water seepage holes 15 for preliminary filtration. After the preliminarily filtered water enters the membrane sheet 18, impurities and pollutants in the water are removed. The filtered clear water is collected through the product water spacer mesh 19, thereby realizing the effective filtration and collection of water.

[0033] Thus, a series of operations are completed. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0034] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent substitution on some of the technical features. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A wound membrane element structure for improving water recovery, comprising a central water collecting pipe (1), characterized in that: The outer surface of one end of the central water collecting pipe (1) is provided with an external thread (2), and one end of the central water collecting pipe (1) is rotatably connected to an end cover (4), the interior of the end cover (4) is provided with an internal thread (3), and the end cover (4) and the central water collecting pipe (1) are connected via the internal thread (3) and the external thread (2); The left side of the end cover (4) is connected to a support pipe (5), and an impeller (6) is installed inside the support pipe (5). A slide groove (7) is provided inside the support pipe (5), and a slider (8) is slidably connected inside the slide groove (7), and a filter screen (9) is fixedly connected to the bottom of the slider (8).

2. A wound membrane element structure for improving water recovery according to claim 1, characterized in that: A limiting groove (10) is provided at one end of the sliding block (8), and a cavity (11) is provided inside the supporting pipe (5). The cavity (11) is slidably connected to a limiting rod (12), and a tension spring (13) is fixedly connected between the cavity (11) and the limiting rod (12).

3. A wound membrane element structure for improving water recovery according to claim 1, characterized in that: A guide groove (14) is provided inside the central water collecting pipe (1).

4. A wound membrane element structure for improving water recovery according to claim 3, characterized in that: A water seepage hole (15) is provided on the top of the guide groove (14).

5. A wound membrane element structure for improving water recovery according to claim 1, characterized in that: The outer surface of the central water collecting pipe (1) is connected to a water inlet screen (16), and an adhesive (17) is provided on the outer surface of the water inlet screen (16).

6. A wound membrane element structure for improving water recovery according to claim 5, characterized in that: The outer surface of the adhesive (17) is connected to a diaphragm (18), and the outer side of the diaphragm (18) is connected to a water production screen (19) via the adhesive (17).

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