A nanofiltration membrane device

Abstract

The utility model discloses a nanofiltration membrane device, including installation cylinder, the outer wall of installation cylinder is equipped with the discharge gate near one side, is used for discharging the liquid after processing, the central position of installation cylinder is installed with the discharge pipe and is penetrated, realizes the directional delivery of post -filtration material, installation cylinder inner wall is equipped with the first circular frame near one side department, is used for supporting and positioning internal component, the outer wall of discharge pipe is closely combined and is installed with nanofiltration membrane, is used for fine filtering to liquid, the filter assembly includes installation pipe, is equipped with the rotating shaft at installation pipe horizontal center line department, the outer wall of installation pipe is surrounded and is provided with annular pipe, the utility model discloses a filter assembly, when the big particle impurity is intercepted in the screen primary filtration, the impurity on the screen can be cleaned by the rotation of scraper driven by motor, cooperate annular pipe and the backflush system depth cleaning screen of liquid jet pipe, can avoid the blockage, guarantee the smoothness of filtration passage, improve the filtering stability.

Description

Technical Field

[0001] This utility model mainly relates to the field of food nutrition processing technology, specifically a nanofiltration membrane device. Background Technology

[0002] In the field of food nutrition processing technology, consumers are increasingly demanding stability and effectiveness of food nutrients, leading to the widespread application of active microencapsulation technology. This technology effectively reduces the impact of environmental factors by encapsulating active ingredients. The specific steps include material preparation, encapsulation process, and curing. Among these steps, the application of concentration and hydrolysis technology is crucial. The process includes operations such as chromatographic separation, extraction of active ingredients, concentration treatment, and hydrolysis of macromolecules. In the purification stage, nanofiltration technology plays a key role, enabling the efficient removal of impurities through nanofiltration membrane devices.

[0003] In some existing nanofiltration membrane devices, a filter screen is usually installed at the front end of the nanofiltration membrane to perform preliminary filtration of the liquid, thereby improving the overall filtration effect. However, during the filtration process, the pre-filter screen is prone to clogging after prolonged use, which will adversely affect the filtration effect. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. It mainly provides a nanofiltration membrane device to solve the technical problem mentioned in the background that the pre-filter in traditional nanofiltration membrane devices is prone to clogging after long-term use, which affects the filtration effect.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A nanofiltration membrane device includes an installation cylinder containing a nanofiltration membrane, with a filter assembly at one end of the installation cylinder.

[0007] The filter assembly includes an installation tube, a rotating shaft located at the horizontal center line of the installation tube, an annular tube surrounding the outer wall of the installation tube, and several spray pipes evenly distributed on the annular tube to form a liquid backflushing system. The inner wall of the installation tube is provided with a filter screen for initial filtration of the liquid entering the installation tube to intercept impurities. A scraper is installed on one end of the outer wall of the rotating shaft. During the operation of the device, the scraper can rotate with the rotating shaft to remove the filter residue adhering to the surface of the filter screen.

[0008] More preferably, the outer wall of the mounting cylinder is provided with a discharge port near one side for discharging the treated liquid. A discharge pipe is installed through the center of the mounting cylinder to realize the directional conveying of the filtered material. A first circular baffle is provided near one side of the inner wall of the mounting cylinder for supporting and positioning the internal components. A nanofiltration membrane is tightly fitted to the outer wall of the discharge pipe for fine filtration of the liquid. A second circular baffle is tightly fitted to one side of the nanofiltration membrane. A first flange is provided on the other side of the outer wall of the mounting cylinder. A second flange matching the first flange is provided on one side of the outer wall of the mounting pipe, and one side of the second flange is tightly abutting against the outer wall of the second circular baffle.

[0009] More preferably, the top of the outer wall of the mounting tube is provided with a feed inlet, and valves are installed at the bottom of its outer wall and the outer wall of the annular tube.

[0010] In a further preferred embodiment, a third flange is provided on the other side of the outer wall of the mounting pipe, which is securely connected to the fourth flange by bolts, and an mounting plate is fixedly installed on the inner wall of the fourth flange.

[0011] More preferably, a rotating shaft is rotatably connected through the center of the mounting plate, and the scrapers are symmetrically distributed about the horizontal center line of the rotating shaft as the axis of symmetry.

[0012] In a further preferred embodiment, the outer wall of the discharge pipe is provided with several holes, and the outer wall of the discharge pipe is covered with a turbulence promoting mesh. The liquid that has been finely filtered by the nanofiltration membrane can smoothly enter the internal channel of the discharge pipe through these holes, and then be discharged through the discharge device at the end of the discharge pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This nanofiltration membrane device uses a filtration assembly. When liquid enters the device, it first passes through a filter screen for initial filtration, intercepting larger particulate impurities. During operation, a motor drives a rotating shaft to rotate a scraper, continuously scraping off filter residue from the filter screen surface, thus preventing filter screen clogging. At the same time, a backwashing system composed of a ring pipe and a spray pipe can perform deep cleaning of the filter screen, ensuring unobstructed filtration channels and improving the filtration efficiency and stability of the device.

[0015] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the full cross-section of the present invention;

[0018] Figure 3This is an enlarged structural schematic diagram of the filter assembly of this utility model;

[0019] Figure 4 This is a fully enlarged cross-sectional structural diagram of the filter assembly of this utility model.

[0020] Numbering on the map:

[0021] 1. Mounting cylinder; 2. Discharge port; 3. Discharge pipe; 4. First circular baffle; 5. Nanofiltration membrane; 6. Second circular baffle; 7. Filter assembly; 701. Mounting pipe; 702. Second flange; 703. Inlet; 704. Annular pipe; 705. Third flange; 706. Valve; 707. Spray pipe; 708. Filter screen; 709. Fourth flange; 7010. Mounting plate; 7011. Rotating shaft; 7012. Scraper; 8. First flange. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] Please refer to the appendix carefully. Figure 1-4A nanofiltration membrane device includes an installation cylinder 1. The outer wall of the installation cylinder 1 is provided with a discharge port 2 near one side for discharging the treated liquid. A discharge pipe 3 is installed through the central axis of the installation cylinder 1 to realize the directional conveying of the filtered material. A first circular baffle 4 is provided on the inner wall of the installation cylinder 1 near one side for supporting and positioning the internal components. A nanofiltration membrane 5 is tightly fitted to the outer wall of the discharge pipe 3 for fine filtration of the liquid. The filter assembly 7 includes an installation pipe 701, a rotating shaft 7011 located at the horizontal center line of the installation pipe 701, an annular pipe 704 surrounding the outer wall of the installation pipe 701, and several spray pipes 707 evenly distributed on the annular pipe 704 to form a liquid backwash system. The inner wall of the installation pipe 701 is provided with a filter screen 708 for initial filtration of the liquid entering the installation pipe 701 to intercept impurities. A scraper 7012 is installed on one end of the outer wall of the rotating shaft 7011. During the operation of the device, the scraper 7012 can rotate with the rotating shaft 7011 to remove the filter residue adhering to the surface of the filter screen 708.

[0025] In this embodiment, as Figure 2 , Figure 3 and Figure 4 As shown, one side of the nanofiltration membrane 5 is tightly fitted with the second circular baffle 6. The baffle provides stable support for the nanofiltration membrane 5 by limiting its position. The other side of the outer wall of the mounting cylinder 1 is provided with a first flange 8. Correspondingly, a second flange 702 is provided on the outer wall of the mounting pipe 701. The two are fastened with bolts to form a detachable sealed connection structure, which facilitates equipment maintenance and component replacement, and ensures the sealing of the fluid transport path. At the same time, one side of the mounting pipe 701 is tightly connected to the outer wall of the second circular baffle 6, providing support for the second circular baffle 6.

[0026] In this embodiment, as Figure 3 and Figure 4 As shown, the top of the outer wall of the installation pipe 701 is provided with an inlet 703, which serves as an input channel for liquid raw materials. The bottom of its outer wall and the outer wall of the annular pipe 704 are both equipped with valves 706. The discharge port on the inner wall of the installation pipe 701 and the discharge port on the inner wall of the installation cylinder 1 are both provided with conical grooves. By controlling the opening and closing of the valves 706, the sewage in the installation pipe 701 can be discharged. The sewage filtered by the nanofiltration membrane 5 can be discharged through the discharge port 2. When it is necessary to clean the filter screen 708, the cleaning liquid can also be controlled to backwash the filter screen from the annular pipe 704 through the spray pipe 707, which effectively improves the practicality of the equipment.

[0027] In this embodiment, as Figure 3 and Figure 4As shown, a third flange 705 is provided on the other side of the outer wall of the mounting pipe 701, which is securely connected to the fourth flange 709 by bolts. The mounting plate 7010 is fixedly installed on the inner wall of the fourth flange 709, so that the structure composed of the fourth flange 709, the mounting plate 7010, the rotating shaft 7011 and the scraper 7012 can be disassembled, thereby facilitating the maintenance of the device.

[0028] In this embodiment, as Figure 3 and Figure 4 As shown, a rotating shaft 7011 is rotatably connected through the center of the mounting plate 7010 and via a mechanical seal ring. Two or more sets of scrapers 7012 are symmetrically distributed about the horizontal center line of the rotating shaft 7011. The surface of the scraper 7012 is inlaid with polytetrafluoroethylene wear-resistant strips, which are 2mm thick and fit against the surface of the filter screen 708. The filter screen 708 can be a hemispherical filter screen, which consists of a hemispherical support frame and the filter screen. During equipment operation, a geared motor can be connected to the end of the rotating shaft 7011. The geared motor can drive the scraper 7012 to rotate through the rotating shaft 7011, which can clean the filter residue on the surface of the filter screen 708 and ensure that the filter screen maintains good filtration performance.

[0029] In this embodiment, as Figure 3 As shown, the outer wall of the discharge pipe 3 has several holes, one end of which is closed. The holes on the discharge pipe 3 are evenly distributed at equal intervals, with the spacing between holes being three times the diameter of the holes. The outer wall of the discharge pipe 3 is covered with a turbulence-promoting mesh. The liquid that has been finely filtered by the nanofiltration membrane 5 can smoothly enter the internal channel of the discharge pipe 3 through these holes, and then be discharged through the discharge device at the end of the discharge pipe 3, so that the liquid after filtration can be smoothly discharged, realizing the directional transportation of the filtered liquid.

[0030] The specific operating procedure of this utility is as follows: When using this device, it can be installed on a matching mounting bracket, or multiple devices can be connected in series to perform multiple filtrations on the liquid. When the device is in use, the liquid is drawn by the pump body. The liquid raw material enters the equipment through the feed port 703 at the top of the outer wall of the installation pipe 701. After entering the installation pipe 701, the liquid first passes through the internal filter screen 708 for initial filtration. The filter screen 708 can intercept larger particulate impurities in the liquid to achieve preliminary filtration.

[0031] The liquid, after initial filtration, continues to flow, passing through the through-holes on the second circular baffle 6 and through the nanofiltration membrane 5 tightly fitted to the outer wall of the discharge pipe 3. The nanofiltration membrane 5 performs fine filtration, separating smaller impurities and ions in the liquid, thereby achieving deep filtration of the liquid. The liquid, after fine filtration by the nanofiltration membrane 5, enters the internal channel of the discharge pipe 3 through the evenly distributed holes on the outer wall of the discharge pipe 3. Since one end of the discharge pipe 3 is closed, the liquid can only be discharged from the end of the device, realizing the directional transport of the filtered liquid. The filtered waste liquid passes through the through-holes on the first circular baffle 4 and is finally discharged from the outlet 2 near one side of the outer wall of the mounting cylinder 1, completing the liquid filtration process.

[0032] During equipment operation, in order to ensure the continuous good filtration performance of filter screen 708, a motor drives the rotating shaft 7011 to rotate. Since scraper 7012 is installed on the outer wall of rotating shaft 7011 and is in close contact with the surface of filter screen 708, scraper 7012 will rotate with rotating shaft 7011 to clean the filter residue attached to the surface of filter screen 708, scrape the filter residue off the surface of filter screen and prevent filter screen from clogging.

[0033] When a deeper cleaning of the filter screen 708 is required, first stop the device from working, connect the pump body that draws the cleaning liquid to the valve 706 equipped on the outer wall of the annular pipe 704 through the pipe, and then operate the valve 706 equipped on the bottom of the outer wall of the installation pipe 701 and the outer wall of the annular pipe 704 to draw the cleaning liquid using the pump body. The cleaning liquid is then backwashed from the annular pipe 704 through the spray pipe 707 that is evenly distributed on the annular pipe 704. During the backwashing, the scraper 7012 rotates at a low speed, and the backwashed cleaning liquid can further remove impurities remaining in the gaps of the filter screen, effectively improving the cleaning effect of the filter screen 708.

[0034] When further maintenance is required, the mounting cylinder 1 and the mounting pipe 701 are fastened together by bolts through the first flange 8 and the second flange 702. The third flange 705 and the fourth flange 709 on the other side of the mounting pipe 701 are also connected by bolts. The structure consisting of the fourth flange 709, the mounting plate 7010, the rotating shaft 7011 and the scraper 7012, as well as the structure consisting of the mounting pipe 701 and the second flange 702, are all detachable. These designs facilitate equipment inspection and maintenance, ensuring the convenience of equipment maintenance work.

[0035] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A nanofiltration membrane device, comprising an installation cylinder (1) in which a nanofiltration membrane (5) is built-in, characterized in that: A filter assembly (7) is provided at one end of the mounting cylinder (1); The filter assembly (7) includes an installation tube (701), a rotating shaft (7011) is provided at the horizontal center line of the installation tube (701), an annular tube (704) is arranged around the outer wall of the installation tube (701), and a number of spray pipes (707) are evenly distributed on the annular tube (704) to form a liquid backflushing system. The inner wall of the installation tube (701) is provided with a filter screen (708) for initial filtration and interception of impurities in the liquid entering the installation tube (701). A scraper (7012) is installed on the outer wall of the rotating shaft (7011) near one end. During the operation of the device, the scraper (7012) can rotate with the rotating shaft (7011) to remove the filter residue attached to the surface of the filter screen (708).

2. The nanofiltration membrane device according to claim 1, characterized in that: The outer wall of the mounting cylinder (1) is provided with a discharge port (2) near one side for discharging the treated liquid. A discharge pipe (3) is installed through the center of the mounting cylinder (1) to realize the directional conveying of the filtered material. A first circular baffle (4) is provided near one side of the inner wall of the mounting cylinder (1) for supporting and positioning the internal components. A nanofiltration membrane (5) is tightly fitted to the outer wall of the discharge pipe (3) for fine filtration of the liquid. A second circular baffle (6) is tightly fitted to one side of the nanofiltration membrane (5). A first flange (8) is provided on the other side of the outer wall of the mounting cylinder (1). A second flange (702) matching the first flange (8) is provided on one side of the outer wall of the mounting pipe (701), and one side of it is tightly abutted against the outer wall of the second circular baffle (6).

3. The nanofiltration membrane device according to claim 1, characterized in that: The top of the outer wall of the installation pipe (701) is provided with a feed inlet (703), and valves (706) are installed on the bottom of its outer wall and the outer wall of the annular pipe (704).

4. A nanofiltration membrane device according to claim 1, characterized in that: The third flange (705) is provided on the other side of the outer wall of the mounting pipe (701), and is securely connected to the fourth flange (709) by bolts. The mounting plate (7010) is fixedly installed on the inner wall of the fourth flange (709).

5. A nanofiltration membrane device according to claim 4, characterized in that: The mounting plate (7010) has a rotating shaft (7011) that runs through and rotatably connects to its center, and the scrapers (7012) are symmetrically distributed with the horizontal center line of the rotating shaft (7011) as the axis of symmetry.

6. A nanofiltration membrane device according to claim 2, characterized in that: The outer wall of the discharge pipe (3) is provided with several holes, and the outer wall of the discharge pipe (3) is covered with a turbulence promoting net. The liquid after being finely filtered by the nanofiltration membrane (5) can smoothly enter the internal channel of the discharge pipe (3) through these holes, and then be discharged through the end device of the discharge pipe (3).

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