RO (Reverse Osmosis) membrane filter element convenient for action of scale inhibitor

Abstract

The utility model relates to the technical field of water purifiers. The utility model discloses an RO membrane filter element convenient for antisludging agent action, which comprises a central pipe, an RO membrane, an end cover, a fixing piece and an antisludging sleeve, one end of the central pipe is through, the other end of the central pipe is closed, the central pipe comprises a plurality of through holes, the RO membrane is wound and fixed on the outer layer of the central pipe, the end cover is hermetically inserted and fixed on one end of the RO membrane, and the fixing piece is fixed on the antisludging sleeve. The fixing piece is arranged at the end, away from the end cover, of the outer side of the RO membrane, the scale inhibition sleeve is fixed to the outer side of the RO membrane through the fixing piece matched with the fixing piece, and a plurality of through sleeve through holes are formed in the end, away from the fixing piece, of the scale inhibition sleeve and the side, close to the RO membrane, of the scale inhibition sleeve. The RO membrane filter element is provided with the scale inhibition sleeve for placing the scale inhibitor, so that the scale inhibitor can act on sewage which is about to enter the RO membrane more accurately, waste caused by directly adding the scale inhibitor into the whole sewage is avoided, and the utilization efficiency of the scale inhibitor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water purifiers, in particular to an RO membrane filter element facilitating the action of scale inhibitors. Background Art

[0002] RO is the abbreviation of Reverse Osmosis in English, and its Chinese meaning is reverse osmosis. Its working principle is to perform membrane separation and filtration relying on the pressure difference. When pressure is applied to the feed liquid on one side of the membrane and the pressure exceeds its osmotic pressure, the solvent will perform reverse osmosis against the direction of natural osmosis. Since the pore size of the RO membrane is very small, it can intercept various inorganic ions, colloidal substances, macromolecular solutes, etc. in water, so that water molecules can pass through the RO membrane to the other side to form clean water, while impurities, salts, etc. in the raw water cannot pass through the RO membrane and are intercepted. The RO membrane has the characteristic of high filtration accuracy and can effectively remove calcium, magnesium, bacteria, organic matter, inorganic matter, metal ions, radioactive substances, etc. in water. The water purified by the RO membrane is pure, clear and has a sweet taste. In the civil aspect, the RO membrane is mostly used in water purifiers and can be used for drinking water purification in enterprises and institutions such as families, hotels, hotels, hospitals, etc.

[0003] In sewage treatment technology, after the sewage is purified in the early stage, it finally undergoes the last step of filtration treatment through the RO membrane. However, there are still relatively high concentrations of calcium, magnesium, carbonate, sulfate and other ions remaining in the sewage. The RO membrane can remove most of the ions, dissolved organic matter, microorganisms and bacteria in the sewage, thus obtaining very high-purity product water. However, when calcium, magnesium, carbonate, sulfate and other ions are concentrated to reach the supersaturated state under the action of the RO membrane, scale will precipitate. These dirt greatly reduce the service life of the RO membrane. The existing technology adds scale inhibitors to the sewage to reduce the dirt generated in the RO membrane and extend the service life of the RO membrane, but directly adding scale inhibitors to the sewage wastes more scale inhibitors and cannot accurately act on the sewage, and cannot accurately prevent dirt from being generated in the RO membrane. Content of the Utility Model

[0004] In order to solve the deficiencies of the existing technology, the present application discloses an RO membrane filter element facilitating the action of scale inhibitors, which can accurately act on sewage, improve the utilization efficiency of scale inhibitors and is targeted at the RO membrane.

[0005] The utility model discloses an RO membrane filter element facilitating the action of a scale inhibitor, which comprises a central tube, an RO membrane sheet, end caps, fixing members and a scale inhibitor sleeve. One end of the central tube penetrates through and the other end is closed. The central tube is provided with a plurality of through holes. The RO membrane sheet is wound and fixed on the outer layer of the central tube. The end cap is hermetically inserted and fixed at one end of the RO membrane sheet. The fixing member is arranged at the outer side of the RO membrane sheet away from the end cap. An outwardly protruding fixing member thread is arranged inside the fixing member. The scale inhibitor sleeve is used for placing the scale inhibitor. A sleeve thread corresponding to the fixing member thread is arranged at one end of the scale inhibitor sleeve. The scale inhibitor sleeve is fixed on the outer side of the RO membrane sheet through cooperation with the fixing member. A plurality of through sleeve holes are arranged at the end of the scale inhibitor sleeve away from the fixing member and on the side close to the RO membrane sheet.

[0006] Further, the scale inhibitor sleeve comprises a scale inhibitor sleeve cover and at least two layers of flow guiding layers. The scale inhibitor sleeve cover is arranged at the end of the scale inhibitor sleeve away from the fixing member. A plurality of through scale inhibitor sleeve cover holes are penetrated near the edge of the scale inhibitor sleeve cover. At least two layers of flow guiding layers are enclosed and arranged inside the scale inhibitor sleeve. A plurality of through holes are arranged on the side close to the end cap of the flow guiding layer far from the RO membrane sheet among the at least two layers of flow guiding layers. A plurality of through holes are arranged on the side away from the end cap of the flow guiding layer close to the RO membrane sheet among the at least two layers of flow guiding layers.

[0007] Further, the flow guiding layer is fixedly connected to the scale inhibitor sleeve cover, and the scale inhibitor sleeve cover is detachably fixed to the scale inhibitor sleeve.

[0008] Further, the aperture of the through hole penetrated at the end of the scale inhibitor sleeve away from the fixing member is smaller than the aperture of the through hole penetrated on the side of the scale inhibitor sleeve close to the RO membrane sheet.

[0009] Further, at the position where a plurality of through sleeve holes are arranged on the side of the scale inhibitor sleeve close to the RO membrane sheet, the scale inhibitor sleeve with sleeve holes occupies 60%-70% of the whole length of the scale inhibitor sleeve, and the remaining scale inhibitor sleeve on the side close to the fixing member is hermetically arranged.

[0010] Further, fixing collar rings for fixing the RO membrane sheet are respectively arranged at the outer sides of the RO membrane sheet close to both ends.

[0011] Further, the RO membrane filter element is provided with at least three scale inhibitor sleeves with different sizes in a matching manner.

[0012] The beneficial effects of the utility model:

[0013] The RO membrane filter element of the present application is provided with a scale inhibitor sleeve to place the scale inhibitor, enabling the scale inhibitor to act more precisely on the sewage about to enter the RO membrane, avoiding waste caused by directly adding the scale inhibitor to the entire sewage, improving the utilization efficiency of the scale inhibitor, the precise scale inhibition effect reducing the waste of the scale inhibitor, while extending the service life of the RO membrane, reducing the cost of sewage treatment, and improving the overall economic benefit and treatment efficiency. Through the threaded fit between the fixing member and the scale inhibitor sleeve, it can ensure the stable fixation of the scale inhibitor sleeve outside the RO membrane sheet, not easily loosening, and guaranteeing the stability of the entire structure during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of an RO membrane filter element in an embodiment of the present application.

[0015] Figure 2 It is a schematic structural diagram of an RO membrane filter element removing the scale inhibitor sleeve in an embodiment of the present application.

[0016] Figure 3 It is a schematic structural diagram of a central tube in an embodiment of the present application.

[0017] Figure 4 It is a schematic structural diagram of a scale inhibitor sleeve removing the scale inhibitor sleeve cover in an embodiment of the present application.

[0018] Figure 5 It is another schematic structural diagram of an RO membrane filter element in an embodiment of the present application.

[0019] Figure 6 It is a schematic structural diagram of a scale inhibitor sleeve cover and a diversion layer in an embodiment of the present application.

[0020] In the figure: RO membrane filter element 100, which includes central tube 11, RO membrane sheet 12, end cap 13, fixing member 14, scale inhibitor sleeve 15, scale inhibitor sleeve cover 151, diversion layer 152, and fixing collar 16. SPECIFIC EMBODIMENTS

[0021] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the specific embodiments of the present utility model will be clearly and completely described below.

[0022] The present application discloses an RO membrane filter element 100 facilitating the action of the scale inhibitor, as Figure 1 and Figure 2 shown, this RO membrane filter element 100 includes a central tube 11, an RO membrane sheet 12, an end cap 13, a fixing member 14, and a scale inhibitor sleeve 15. One end of the central tube 11 penetrates and the other end is closed, as Figure 3As shown, the central tube 11 includes a number of through holes. The central tube 11 is the basic framework of the RO membrane filter element 100. The RO membrane sheet 12 is wound and fixed on the outer layer of the central tube 11, and the end cap 13 is hermetically inserted and fixed at one end of the RO membrane sheet 12. The fixing member 14 is arranged at the end of the RO membrane sheet 12 away from the end cap 13 on the outer side. There is an outwardly protruding fixing member 14 thread on the inner side of the fixing member 14. The scale inhibitor sleeve 15 is used to place the scale inhibitor. Placing the scale inhibitor specifically in the scale inhibitor sleeve 15 can play the scale inhibition role more concentratedly and effectively, target the water flow entering the RO membrane filter element 100, reduce the formation of scale on the membrane surface, and extend the service life of the RO membrane. There is a sleeve thread corresponding to the fixing member 14 thread on one end of the scale inhibitor sleeve 15. The scale inhibitor sleeve 15 is fixed on the outer side of the RO membrane sheet 12 by cooperating with the fixing member 14, as Figure 4 shown. A number of through sleeve holes are provided on the side of the scale inhibitor sleeve 15 away from the fixing member 14 and close to the RO membrane sheet 12. When the RO membrane filter element 100 of the present application filters sewage, first, the scale inhibitor is loaded into the scale inhibitor sleeve 15. Since the scale inhibitor sleeve 15 can be removed from the RO membrane filter element 100, different types or doses of scale inhibitors can be selected and placed in the sleeve according to different water qualities and usage requirements to specifically treat the sewage. The scale inhibitor sleeve 15 filled with the scale inhibitor is fixed to the fixing member 14 on the outer side of the RO membrane filter element 100 through the sleeve thread on the scale inhibitor sleeve 15. Then, the through sleeve holes at the end of the RO membrane filter element 100 away from the fixing member 14 are used as the sewage inlet to treat the sewage. After the sewage enters the scale inhibitor sleeve 15, it first reacts with the scale inhibitor. The scale inhibitor solvent prevents the sewage from scaling in the sewage. Then, the sewage enters the outer layer of the RO membrane sheet 12 through a number of sleeve holes provided on the side of the scale inhibitor sleeve 15 close to the RO membrane sheet 12. The sewage flows from the outer layer of the RO membrane sheet 12 towards the inner layer of the RO membrane sheet 12, as Figure 5As shown, after the sewage passes through the RO membrane sheet 12, the finally clean purified water enters the central pipe 11 through several through holes on the central pipe 11, and then flows out through one end of the central pipe 11 that penetrates. The sewage in the RO membrane sheet 12 flows out from one end of the RO membrane sheet 12 that is far from the end cover 13 and is hermetically inserted. In this application, according to the specific concentration of ions and the water quality characteristics in the sewage, a suitable type and dosage of scale inhibitor can be selected and placed in the scale inhibitor sleeve 15 to achieve more targeted scale inhibition treatment, enhancing the protection effect on the RO membrane. The RO membrane filter element 100 of this application is provided with a scale inhibitor sleeve 15 to place the scale inhibitor, enabling the scale inhibitor to act more precisely on the sewage about to enter the RO membrane, avoiding waste caused by directly adding the scale inhibitor to the entire sewage, improving the utilization efficiency of the scale inhibitor, the precise scale inhibition effect reduces the waste of the scale inhibitor, and at the same time extends the service life of the RO membrane, reduces the cost of sewage treatment, and improves the overall economic benefit and treatment efficiency. Through the threaded cooperation between the fixing member 14 and the scale inhibitor sleeve 15, it can ensure the stable fixation of the scale inhibitor sleeve 15 outside the RO membrane sheet 12, not easy to loosen, and ensure the stability of the entire structure during operation.

[0023] As an implementation manner, as Figure 6 shown, the scale inhibitor sleeve 15 includes a scale inhibitor sleeve cover 151 and at least two layers of diversion layers 152. The scale inhibitor sleeve cover 151 is arranged at one end of the scale inhibitor sleeve 15 far from the fixing member 14. Several through holes of the scale inhibitor sleeve cover 151 penetrate near the edge of the scale inhibitor sleeve cover 151. At least two layers of diversion layers 152 are arranged in a surrounding manner inside the scale inhibitor sleeve 15. Several through holes are arranged on one side of the diversion layer 152 far from the RO membrane sheet 12 and close to the end cover 13 among at least two layers of diversion layers 152, and several through holes are arranged on one side of the diversion layer 152 close to the RO membrane sheet 12 and far from the end cover 13 among at least two layers of diversion layers 152. The design of at least two layers of diversion layers 152 extends the flow path of the sewage in the scale inhibitor sleeve 15, enabling the sewage to have a more sufficient contact time and contact area with the scale inhibitor, thereby improving the dissolution effect of the scale inhibitor.

[0024] As an implementation manner, the diversion layer 152 is fixedly connected to the scale inhibitor sleeve cover 151, and the scale inhibitor sleeve cover 151 is detachably fixed to the scale inhibitor sleeve 15. The diversion layer 152 is fixedly connected to the scale inhibitor sleeve cover 151, which can be operated as a whole during installation, improving the assembly efficiency and accuracy. The detachable scale inhibitor sleeve cover 151 makes the maintenance, replacement or inspection of the internal diversion layer 152 and the scale inhibitor more convenient and fast, without the need for large-scale disassembly of the entire device.

[0025] As an implementation manner, the aperture of the through hole penetrating through one end of the scale inhibitor sleeve 15 away from the fixing member 14 is smaller than the aperture of the through hole penetrating through the side of the scale inhibitor sleeve 15 close to the RO membrane sheet 12. The end with the smaller aperture can first preliminarily filter the sewage to intercept impurities with larger particles, and the end with the larger aperture is beneficial for the preliminarily treated sewage to enter the RO membrane sheet 12 more smoothly, achieving a hierarchical filtration effect.

[0026] As an implementation manner, a number of through sleeve through holes are provided on the side of the scale inhibitor sleeve 15 close to the RO membrane sheet 12. The scale inhibitor sleeve 15 with sleeve through holes occupies 60%-70% of the entire length of the scale inhibitor sleeve 15, and the remaining scale inhibitor sleeve 15 on the side close to the fixing member 14 is hermetically arranged. The part with sleeve through holes occupies 60%-70% of the length, so that the sewage has sufficient residence time in the area where it is in full contact with the scale inhibitor, ensuring that the scale inhibitor is fully dissolved in the water.

[0027] As an implementation manner, fixing collar rings 16 for fixing the RO membrane sheet 12 are respectively arranged on the outer side of the RO membrane sheet 12 near both ends. The fixing collar rings 16 can effectively fix the position of the RO membrane sheet 12, prevent it from shifting, twisting or folding when impacted by water flow or pressure changes, thereby ensuring the stable performance of the filtering function of the RO membrane sheet 12, making the force on the membrane sheet more uniform during the filtering process, avoiding local overstress leading to membrane sheet damage, extending the service life of the RO membrane sheet 12, and also being able to prevent unfiltered sewage from leaking from both ends of the membrane sheet to a certain extent, improving the sealing and reliability of the filtration.

[0028] As an implementation manner, the RO membrane filter element 100 includes at least three scale inhibitor sleeves 15 of different sizes arranged in a matching manner. The appropriate size of the scale inhibitor sleeve 15 can be selected according to the sewage treatment volume. When the treatment volume is large, a larger scale inhibitor sleeve 15 is selected to accommodate more scale inhibitor to ensure the scale inhibition effect; when the treatment volume is small, a smaller scale inhibitor sleeve 15 is selected to avoid waste of resources. The degree of scale inhibition required and the demand for scale inhibitor may be different in different water qualities. For water with higher hardness and easy to scale, a larger sleeve or a sleeve with a larger scale inhibitor capacity can be selected, while for water with better quality and less scaling tendency, a smaller sleeve can be selected. Multiple scale inhibitor sleeves 15 of different sizes are reserved as spare parts. When a certain sleeve is damaged or needs to be repaired, it can be replaced in time to reduce the equipment downtime.

[0029] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. An RO membrane filter element that facilitates the action of a scale inhibitor, characterized in that: include: A central tube, one end of which is penetrated and the other end is closed, and the central tube includes a plurality of through holes; an RO diaphragm, the RO diaphragm is wound and fixed on the outer layer of the central tube; The end cover is sealed and plugged into one end of the RO diaphragm; A fixing part, which is arranged on the outer side of the RO membrane at one end away from the end cover, and an outwardly protruding fixing part thread is arranged on the inner side of the fixing part; The scale-inhibiting sleeve is used for placing scale inhibitors. A sleeve thread corresponding to the thread of the fixing piece is arranged on one end of the scale-inhibiting sleeve. The scale-inhibiting sleeve is fixed to the outside of the RO diaphragm by cooperating with the fixing piece. A plurality of penetrating sleeve through holes are arranged on the end of the scale-inhibiting sleeve away from the fixing piece and on the side close to the RO diaphragm.

2. According to the RO membrane filter element for facilitating the antiscalant action as claimed in claim 1, it is characterized by: The scale-inhibiting sleeve comprises a scale-inhibiting sleeve cover and at least two guide layers. The scale-inhibiting sleeve cover is arranged at one end of the scale-inhibiting sleeve away from the fixing part. A plurality of through holes of the scale-inhibiting sleeve cover are penetrated near the edge of the scale-inhibiting sleeve cover. The at least two guide layers are enclosed in the scale-inhibiting sleeve. A plurality of through holes are arranged on a side of the guide layer away from the RO diaphragm and close to the end cover of at least the two guide layers. A plurality of through holes are arranged on a side of the guide layer close to the RO diaphragm and away from the end cover of at least the two guide layers.

3. According to the RO membrane filter element for facilitating the action of the scale inhibitor as claimed in claim 2, it is characterized in that: The guide layer is fixedly connected to the anti-scaling sleeve cover, and the anti-scaling sleeve cover is detachably fixed to the anti-scaling sleeve.

4. The RO membrane filter element according to claim 1, characterized in that: The diameter of the through hole penetrating the end of the anti-scaling sleeve away from the fixing member is smaller than the diameter of the through hole penetrating the side of the anti-scaling sleeve close to the RO membrane.

5. The RO membrane filter element according to claim 1, characterized in that: A plurality of through-holes are arranged on the side of the anti-scaling sleeve close to the RO membrane. The anti-scaling sleeve with the through-holes occupies 60%-70% of the length of the entire anti-scaling sleeve, and the remaining anti-scaling sleeve close to the fixing part is sealed.

6. The RO membrane filter element according to claim 1, characterized in that: The outer side of the RO diaphragm is respectively provided with fixing rings near both ends for fixing the RO diaphragm.

7. The RO membrane filter element according to claim 1, characterized in that: The RO membrane filter element includes at least three scale-inhibiting sleeves of different sizes.

Images