Membrane filtration equipment

Abstract

The utility model provides membrane filtration equipment, and belongs to the field of food filtration equipment.The membrane filtration equipment comprises a material barrel, a cross-flow filtration pipe, a material conveying pipe, a filtrate pipe and a concentrated liquid pipe, a stirring mechanism, a liquid level probe and a liquid suction pipe are arranged in the material barrel, and the bottom of the stirring mechanism is fixedly connected with a rotating disc which is fixedly connected with the output end of a rotating motor; the upper end of the liquid suction pipe extends out of the charging barrel and is fixedly connected with a material conveying pipe, the lower end of the material conveying pipe is connected with a cross-flow filter pipe, the cross-flow filter pipe comprises a filter pipe and a flow guide pipe, the flow guide pipe wraps the filter pipe, the filter pipe is communicated with the material conveying pipe, a filtrate pipe is arranged at the lower end of the cross-flow filter pipe, and the flow guide pipe is communicated with the filtrate pipe. The filtering pipe penetrates through the filtrate pipe and is communicated with the concentrated liquid pipe, the part of the filtering pipe outside the flow guide pipe is a non-filtering pipeline, and the concentrated liquid pipe is communicated with the charging barrel. The filter has the beneficial effects that the cleaning interval during working is prolonged, and the filtering efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the field of food filtering equipment, in particular to a membrane filtering equipment. Background Art

[0002] In the current production process of condiments such as vinegar and soy sauce, there are many impurities and sediments in the products, and bacteria are also present in the production process. Therefore, membrane filtration equipment is needed to filter the products after production. Most filtration equipment is cross-flow filtration, which removes fine impurities and pollution and filters out bacteria. During the filtration process, as time goes by, the filter membrane will gradually become contaminated and clogged, thereby affecting the efficiency of filtration separation. Therefore, the filter membrane needs to be cleaned. Due to the diversity of pollutants, some pollutants will adhere to the filter membrane, making it more difficult to clean the filter membrane. The filter membrane is cleaned more frequently. Currently, it is cleaned by increasing the hydraulic pressure and flow rate of the cleaning fluid, but the effect is not ideal. In addition, the arrangement of the pipes of the common cross-flow filtration equipment makes the filtration efficiency low or requires more frequent cleaning, and it is impossible to extend the clogging time and improve the filtration efficiency at the same time. Summary of the invention

[0003] The present invention provides a membrane filtration device that can extend the cleaning interval during operation and improve the filtration efficiency, and is particularly suitable for filtering condiments such as vinegar and soy sauce. The technical problem to be solved is that the filter membrane of the membrane filtration device is easily contaminated and blocked during the filtration process, resulting in frequent cleaning and a decrease in filtration efficiency after changing the pipeline structure.

[0004] The technical solution adopted by the present invention is:

[0005] A membrane filtration device comprises a barrel, a cross-flow filter tube, a feed pipe, a filtrate pipe and a concentrate pipe, wherein a stirring mechanism, a liquid level probe and a pipette are arranged inside the barrel, the bottom of the stirring mechanism is fixedly connected to a turntable, the turntable is fixedly connected to an output end of a rotating motor, the upper end of the pipette extends out of the barrel and is fixedly connected to the feed pipe, the lower end of the feed pipe is connected to the cross-flow filter tube, the cross-flow filter tube comprises a filter tube and a guide tube, the guide tube is coated on the outside of the filter tube, the filter tube is connected to the feed pipe, a filtrate pipe is arranged at the lower end of the cross-flow filter tube, the guide tube is connected to the filtrate pipe, the filter tube passes through the filtrate pipe and is connected to the concentrate pipe, the part of the filter tube located outside the guide tube is a non-filter pipe, and the concentrate pipe is connected to the barrel.

[0006] Furthermore, the stirring mechanism in the barrel includes a liquid baffle plate, a spiral plate, a fixed plate and stirring blades. The height of the liquid baffle plate exceeds the connection port of the concentrate tube to the barrel. The spiral plate is fixedly connected to the top of the liquid baffle plate. The outer wall of the spiral plate is fixedly connected to the stirring blades. The stirring blades are evenly arranged along the spiral plate and adjacent stirring blades are equidistant. The liquid suction end of the pipette is located inside the liquid baffle plate.

[0007] Furthermore, two spiral plates are provided, the two spiral plates are in a double spiral structure, the tops of the two spiral plates are fixedly connected to the fixed plate, and the stirring feeding direction of the stirring blade is above the barrel.

[0008] Furthermore, a feed valve is provided at one end of the feed pipe connected to the liquid suction pipe, and a cleaning valve is provided at one end of the feed pipe away from the liquid suction pipe.

[0009] Furthermore, the portion of the filter tube located inside the flow guide tube is composed of a filter membrane, the cross-flow filter tube is vertically arranged, and the cross-flow filter tube has a plurality of curved structures.

[0010] Furthermore, a filtrate valve is provided at one end of the filtrate tube.

[0011] Furthermore, a water supply valve is arranged at the end of the concentrate tube outside the barrel, a flow meter is arranged at the water supply valve, a drain pipe is connected below the concentrate tube, and a drain valve is arranged at the drain pipe.

[0012] Furthermore, each bend of the flow guide pipe and the filter pipe of the cross-flow filter pipe is formed by connecting a straight pipe and a curved pipe through a flange, and the upper and lower ends of the cross-flow filter pipe are both vertical pipes.

[0013] Furthermore, a feed pipe is arranged on the side wall of the barrel, and the concentrate pipe is connected to the lower end of the side wall of the barrel.

[0014] Furthermore, the liquid level probe is connected to a liquid level detector.

[0015] The above structure has the following beneficial effects:

[0016] 1. Due to the use of a barrel and a stirring mechanism for stirring, the concentrate transported by the concentrate pipe is stirred evenly, so that the liquid to be filtered forms a liquid circulation in the barrel, overcoming the problem of uneven liquid concentration in the barrel caused by the continuous increase of concentrate concentration during the filtration process in the existing filtering equipment, thereby maintaining a uniform material concentration in the barrel.

[0017] 2. The cross-flow filter uses double-layer inner and outer tubes for liquid separation and uses curved pipes to promote material filtration and impurity removal, overcoming the problems of the existing horizontal filter pipes being prone to blockage and the vertical filter pipes having poor filtration effects. This enhances the filtration effect while ensuring the removal of impurities from the filter pipe.

[0018] 3. The liquid baffle plate is used to prevent the concentrated liquid from being directly sucked into the liquid suction pipe, and the stirring blade is used to stir and mix the concentrated liquid and the remaining materials. This overcomes the problem of concentration difference of materials in the barrel of the current filtration equipment, and the liquid suction pipe continuously sucks in the concentrated liquid, resulting in a decrease in the filtration effect, thereby improving the overall filtration efficiency.

[0019] 4. Since valves are provided at the ends of the feed pipe, filtrate pipe and concentrate pipe, external liquid can be introduced through the valves for rapid cleaning, and water can be introduced at different pipes to quickly flush different pipes, thus overcoming the current problem of difficult equipment cleaning and making cleaning more convenient.

[0020] 5. Since the cross-flow filter tube is assembled from straight tubes and bent tubes, it can be quickly disassembled and assembled, overcoming the current difficulty in replacing filter membranes in pipelines, making filter membrane replacement and maintenance more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the present invention;

[0022] Figure 2 is a top view of the present invention;

[0023] Figure 3 The present invention Figure 2 Sectional view at AA;

[0024] Figure 4 is a stereogram of the present invention;

[0025] Figure 5 It is a schematic diagram of the internal structure of the present invention.

[0026] In the figure:

[0027] 1. Cylinder; 2. Cross-flow filter tube; 3. Feed pipe; 4. Filtrate tube; 5. Concentrate tube; 11. Feed pipe; 12. Liquid level probe; 13. Liquid baffle plate; 14. Spiral plate; 15. Fixed plate; 16. Suction tube; 17. Stirring blade; 18. Rotating motor; 21. Filter tube; 22. Guide tube; 31. Feed valve; 32. Cleaning valve; 51. Water supply valve; 52. Drain valve. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] like Figure 1-5 As shown:

[0030] A membrane filtration device comprises a barrel 1, a cross-flow filter tube 2, a feed pipe 3, a filtrate tube 4 and a concentrate tube 5. A stirring mechanism, a liquid level probe 12 and a pipette 16 are arranged inside the barrel 1. The bottom of the stirring mechanism is fixedly connected to a turntable, which is connected to the output end of a rotating motor 18 through a flange. The upper end of the pipette 16 extends from the barrel 1 and is connected to the feed pipe 3 through a flange. A liquid pump is arranged at one end of the pipette 16 located inside the barrel 1. The lower end of the feed pipe 3 is connected to the cross-flow filter tube 2. The cross-flow filter tube 2 comprises a filter tube 21 and a flow guide tube 22. The flow guide tube 22 is coated on the outside of the filter tube 21. The filter tube 21 is connected to the feed pipe 3. A filtrate tube 4 is arranged at the lower end of the cross-flow filter tube 2. The flow guide tube 22 is connected to the filtrate tube 4. The filter tube 21 passes through the filtrate tube 4 and is connected to the concentrate tube 5. The part of the filter tube 21 located outside the flow guide tube 22 is a non-filtering pipeline. The concentrate tube 5 is connected to the barrel 1.

[0031] The stirring mechanism in the barrel 1 includes a liquid baffle plate 13, a spiral plate 14, a fixed plate 15 and stirring blades 17. The height of the liquid baffle plate 13 exceeds the connection port of the concentrate tube 5 connected to the barrel 1. The spiral plate 14 is fixedly connected to the top of the liquid baffle plate 13. The stirring blades 17 are welded to the outer wall of the spiral plate 14. The stirring blades 17 are evenly arranged along the spiral plate 14 and the adjacent stirring blades 17 are equidistant. The liquid suction end of the suction tube 16 is located inside the liquid baffle plate 13.

[0032] Two spiral plates 14 are provided, and the two spiral plates 14 are double-helix structures. The tops of the two spiral plates 14 are fixedly connected to the fixed plate 15, and the stirring feeding direction of the stirring blade 17 is above the barrel 1, so that an internal circulation is formed in the barrel 1 during stirring, which promotes the mixing of the concentrate and the remaining materials and avoids the concentration difference of the materials.

[0033] A feeding valve 31 is arranged at one end of the material conveying pipe 3 connected to the liquid suction pipe 16 , and a cleaning valve 32 is arranged at one end of the material conveying pipe 3 away from the liquid suction pipe 16 .

[0034] The part of the filter tube 21 located inside the flow guide tube 22 is composed of a filter membrane, the cross-flow filter tube 2 is vertically arranged, and the cross-flow filter tube 2 has a plurality of curved structures. The filter membrane is a microfiltration membrane.

[0035] A filtrate valve is provided at one end of the filtrate pipe 4, and the filtrate valve is connected to an external clean water pipeline to facilitate subsequent pipeline cleaning work.

[0036] A water supply valve 51 is provided at the end of the concentrate tube 5 outside the barrel 1, a flow meter is provided at the water supply valve 51, a drain pipe is connected below the concentrate tube 5, a drain valve 52 is provided at the drain pipe, and a liquid valve is provided at the place where the concentrate tube 5 is connected to the barrel 1 to control the flow of concentrate.

[0037] Each bend of the flow guide pipe 22 and the filter pipe 21 of the cross-flow filter pipe 2 is formed by connecting a straight pipe and a curved pipe through a flange, and the upper and lower ends of the cross-flow filter pipe 2 are both vertical pipes. Because the cross-flow filter pipe 2 is composed of flanges, the cross-flow filter pipe 2 can be quickly disassembled for maintenance and replacement when it needs to be replaced or is completely blocked.

[0038] A feed pipe 11 is disposed on the side wall of the barrel 1 , and a concentrate pipe 5 is connected to the lower end of the side wall of the barrel 1 .

[0039] The liquid level probe 12 is connected to the liquid level detector.

[0040] How this example works:

[0041] During use, the material is fed into the barrel 1 through the feed pipe 11, and the material is fed to the feed pipe 3 through the suction pipe 16 by the liquid pump inside the barrel 1, and the feed pipe 3 is fed to the cross-flow filter tube 2. A plurality of cross-flow filter tubes 2 are arranged side by side, and the feed pipe 3 feeds the material into the filter tube 21 inside the cross-flow filter tube 2. Because the filter tube 21 is composed of a filter membrane, impurities are retained on the filter membrane when the liquid passes through the filter tube 21, and the filtrate enters the guide tube 22 through the filter membrane. The cross-flow filter tube 2 is a folded curved pipe, which can be set to a serrated or wavy shape. The cross-flow filter tube 2 in a vertical state During filtration, the material passes through the curved pipe and increases the pressure between the liquid and the filter tube 21 with the help of gravity, thereby enhancing the filtration effect, and accelerates the flow of the liquid with the help of the gravity component to remove impurities on the wall of the filter tube 21, so that the flow velocity gradient and the filtration effect can reach a balance, avoiding the extreme situation of choosing one or the other. After the filter tube 21 leaves the curved part of the cross-flow filter tube 2, an ordinary pipe without a filter membrane is used to transport the concentrate back to the bottom of the barrel 1 through the concentrate tube 5, and the filtered filtrate is sent to the filtrate tube 4 through the guide tube 22, and the filtrate tube 4 discharges the filtrate, thereby completing the separation of the filtrate and the concentrate.

[0042] Although the commonly used vertical pipes can prevent impurities from clogging the filter tube 21, they lead to a decrease in the filtering effect, and multiple cycles are required to complete the filtering work. Although there are also horizontally arranged pipes, the bottom of the horizontal pipes is easily clogged. The current solution is to avoid clogging the filter tube 21 by increasing the pressure of the liquid pump, but the power of the pump cannot be increased indefinitely, so the efficiency has an upper limit and will increase energy consumption. Cross-flow filtration mainly uses the high-speed and low-pressure liquid in the center to drive the liquid flow through the flow velocity gradient, and uses the low-speed and high-pressure liquid close to the wall of the filter tube 21 for filtering. At the same time, the pressure difference between the high-speed and low-pressure liquid and the low-speed and high-pressure liquid can also use the liquid flow to carry away impurities on the wall of the filter tube 21. The curved cross-flow filter tube 2 of this scheme uses part of the gravity of the liquid for filtration in the filter tube 2, and the other part is used for impurity removal by the flow velocity gradient of the filter tube 21, ensuring the fusion of the advantages of the two schemes.

[0043] As the filtration proceeds, the concentration of the concentrate will become higher and higher, and it will gradually become viscous, which will cause the filter tube 21 to be blocked and the liquid flow rate to slow down. New materials can be introduced or the concentrate tube 5 can be introduced through the water supply valve 51. In order to prevent the suction tube 16 from directly sucking the concentrate back, a stirring mechanism is provided in the barrel 1, and a liquid baffle 13 is provided at the place where the concentrate tube 5 connects to the barrel 1. The liquid baffle 13 prevents the concentrate from being sucked back. At the same time, the rotating motor 18 drives the liquid baffle 13 to rotate, and the liquid baffle 13 drives the upper double-helical spiral plate 14 to rotate, so that the concentrate is moved upward by the stirring blade 17, so that the material in the barrel 1 forms a cycle. The material moves upward from the bottom near the side wall, and then flows back downward through the center to form a circulation, which promotes the mixing of the concentrate and the remaining materials, avoids the formation of concentration difference causing the concentrate to circulate continuously, and prevents the filtration efficiency from decreasing. The top of the double-helical spiral plate 14 is fixed by a fixing plate 15, so that the structure of the spiral plate 14 is more stable, and the liquid level probe 12 can detect the liquid level, thereby facilitating the control of the material concentration.

[0044] When cleaning is required, close the feed valve 31 and open the cleaning valve 32 to pass clean water. The filter tube 21 can be quickly cleaned with clean water. The cleaning liquid can be discharged through the drain valve 52. The feed valve 31 can be opened and the stirring mechanism can be turned on to pass the cleaning liquid into the barrel 1, thereby completing the cleaning of the pipeline and the barrel 1. The end of the filtrate tube 4 can be passed with clean water at the end away from the drainage end to complete the cleaning of the filtrate tube 4. Each pipe can be separately passed with clean water for cleaning, so that the cleaning effect is better and partial cleaning can be convenient.

[0045] The directional terms mentioned in the present invention, such as "up", "down", "left", "right", etc., are only for better and clearer explanation and understanding of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0046] The above is an explanation of the preferred embodiments of the present invention, but it cannot be understood as a limitation of the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A membrane filtration device, comprising a barrel (1), a cross-flow filtration tube (2), a feed pipe (3), a filtrate pipe (4) and a concentrate pipe (5), characterized in that: A stirring mechanism, a liquid level probe (12) and a liquid suction pipe (16) are arranged inside the barrel (1); the bottom of the stirring mechanism is fixedly connected to a rotating disk; the rotating disk is fixedly connected to the output end of a rotating motor (18); the upper end of the liquid suction pipe (16) extends out of the barrel (1) and is fixedly connected to a feed pipe (3); the lower end of the feed pipe (3) is connected to a cross-flow filter tube (2); the cross-flow filter tube (2) comprises a filter tube (21) and a flow guide tube (22); the flow guide tube (22) is coated on the outside of the filter tube (21); the filter tube (21) is connected to the feed pipe (3); a filtrate tube (4) is arranged at the lower end of the cross-flow filter tube (2); the flow guide tube (22) is connected to the filtrate tube (4); the filter tube (21) passes through the filtrate tube (4) and is connected to a concentrate tube (5); the portion of the filter tube (21) located outside the flow guide tube (22) is a non-filtering pipe; the concentrate tube (5) is connected to the barrel (1).

2. A membrane filtration device according to claim 1, characterized in that: The stirring mechanism in the barrel (1) comprises a liquid baffle plate (13), a spiral plate (14), a fixed plate (15) and a stirring blade (17); the height of the liquid baffle plate (13) exceeds the connection port of the concentrated liquid tube (5) connected to the barrel (1); the top of the liquid baffle plate (13) is fixedly connected to the spiral plate (14); the outer wall of the spiral plate (14) is fixedly connected to the stirring blade (17); the stirring blades (17) are evenly arranged along the spiral plate (14) and adjacent stirring blades (17) are equidistant; the liquid suction end of the liquid suction tube (16) is located inside the liquid baffle plate (13).

3. A membrane filtration device according to claim 2, characterized in that: Two spiral plates (14) are provided, and the two spiral plates (14) are in a double spiral structure. The tops of the two spiral plates (14) are fixedly connected to the fixed plate (15), and the stirring feeding direction of the stirring blade (17) is above the barrel (1).

4. A membrane filtration device according to claim 1, characterized in that: A feed valve (31) is arranged at one end of the feed pipe (3) connected to the liquid suction pipe (16), and a cleaning valve (32) is arranged at one end of the feed pipe (3) away from the liquid suction pipe (16).

5. A membrane filtration device according to claim 1, characterized in that: The portion of the filter tube (21) located inside the flow guide tube (22) is composed of a filter membrane, the cross-flow filter tube (2) is arranged vertically, and the cross-flow filter tube (2) has a plurality of curved structures.

6. A membrane filtration device according to claim 1, characterized in that: A filtrate valve is provided at one end of the filtrate tube (4).

7. A membrane filtration device according to claim 1, characterized in that: The concentrate pipe (5) is provided with a water supply valve (51) at the end outside the barrel (1), a flow meter is provided at the water supply valve (51), and a discharge pipe is connected below the concentrate pipe (5), a discharge valve (52) is provided at the discharge pipe.

8. A membrane filtration device according to claim 5, characterized in that: Each bend of the flow guide pipe (22) and the filter pipe (21) of the cross-flow filter pipe (2) is formed by connecting a straight pipe and a curved pipe through a flange, and the upper and lower ends of the cross-flow filter pipe (2) are both vertical pipes.

9. A membrane filtration device according to claim 1, characterized in that: A feed pipe (11) is arranged on the side wall of the barrel (1), and the concentrate pipe (5) is connected to the lower end of the side wall of the barrel (1).

10. A membrane filtration device according to claim 1, characterized in that: The liquid level probe (12) is connected to the liquid level detector.

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