Membrane separation and concentration equipment for cheese production by-product whey wastewater

Abstract

The invention discloses membrane separation and concentration equipment for cheese production by-product whey wastewater, and belongs to the technical field of whey processing. The device comprises a controller, a support and tank bodies, each tank body is internally provided with a clamping assembly used for clamping and fixing a filtering membrane, each clamping assembly comprises an annular groove formed in the side wall of the corresponding tank body, a moving ring is slidably connected in each annular groove in a sleeved mode, the upper side of each moving ring is rotationally connected with multiple sets of threaded rods, and multiple sets of rotating grooves are formed in the side wall of the corresponding tank body. When whey wastewater is concentrated, a filter membrane is mounted and fixed through structures such as a movable ring and a threaded rod, the operation is simple, the fixing effect is good, and when the filter membrane is used for filtering, a motor is started to drive a control rod and a control ring to rotate back and forth, so that a cleaning plate is driven to rotate back and forth; a simple cleaning effect on the surface of the filtering membrane is formed, and the normal filtering effect of the filtering membrane is prevented from being influenced by excessive deposits on the surface of the filtering membrane.

Description

Technical Field

[0001] The invention relates to the technical field of whey processing, in particular to a membrane separation and concentration device for whey wastewater which is a by-product of cheese production. Background Art

[0002] Whey is a by-product in the production of cheese and casein. 10kg of fresh milk can produce 1kg of cheese and 9kg of whey wastewater. The COD (chemical oxygen demand) content of these whey wastewaters is higher than 8000mg / L, which cannot meet the discharge standard of industrial wastewater. At the same time, the whey protein content in the whey wastewater is low (generally 0.6-0.8%), and the moisture content is above 95%, which cannot be directly used for powder production. Therefore, the treatment of whey wastewater is an urgent problem to be solved by cheese and casein manufacturers.

[0003] Most cheese production companies at home and abroad are small-scale enterprises, and their production scale is generally 10-50 tons / day. Therefore, the daily treatment capacity of whey wastewater is 90-450 tons / day. The treatment capacity of whey wastewater is very large, which also limits the expansion of cheese production companies to a certain extent.

[0004] At present, the treatment of whey wastewater mainly adopts ultrafiltration to concentrate whey wastewater. The principle of ultrafiltration is also a membrane separation process principle. Ultrafiltration uses a pressure-activated membrane to intercept colloids, particles and substances with relatively high molecular weight in the water under the action of external driving force (pressure), while the separation process of water and small solute particles passing through the membrane is simple in overall operation and low in cost.

[0005] However, in the actual working process, the trapped impurities are constantly accumulated on the membrane surface, which seriously affects the filtering effect of the membrane, and when the solute concentration on the membrane surface reaches a certain limit, a gel layer is generated, causing the water permeability of the membrane to drop sharply. There is no treatment operation for the deposits on the surface of the filter membrane, and when the gel layer appears, the entire device needs to be stopped to remove the gel layer. Long-term use and more operations to remove the gel layer will greatly affect the normal concentration efficiency. In the actual working process, it is not clear how much gel layer there is, so more frequent removal operations are required, which is time-consuming and labor-intensive, and further reduces the overall working efficiency. Therefore, a membrane separation and concentration device for whey wastewater, a by-product of cheese production, is provided. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a membrane separation and concentration device for whey wastewater, a by-product of cheese production.

[0007] The present invention adopts the following technical solutions:

[0008] A membrane separation and concentration device for whey wastewater, a by-product of cheese production, comprises a controller, a bracket and a tank body, wherein each group of the tank bodies is provided with a clamping assembly for clamping and fixing a filter membrane, wherein the clamping assembly comprises an annular groove provided on the side wall of the tank body, wherein a moving ring is slidably sleeved in the annular groove, wherein the upper side of the moving ring is rotatably connected to a plurality of groups of threaded rods, wherein the side wall of the tank body is provided with a plurality of groups of rotating grooves, wherein a plurality of groups of the threaded rods penetrate through the rotating grooves and are threadedly connected to the rotating grooves, wherein a plurality of groups of the threaded rods are located in the rotating grooves and are slidably sleeved with sleeves, wherein a gear is fixedly sleeved on the outer side of the sleeve, a rotating ring is rotatably sleeved on the outer side of the tank body, an inner gear ring is fixedly sleeved on the inner side of the rotating ring, and the inner gear ring is meshed with the gear.

[0009] Preferably, a cleaning component for cleaning particles on the surface of the filter membrane is installed in the tank body, and the cleaning component includes an annular control groove opened in the tank body, a control ring is rotatably sleeved in the annular control groove, a rotating cylinder is fixedly connected in the control ring through a connecting plate, a telescopic rod is slidably sleeved in the rotating cylinder, a second spring is fixedly connected between the rotating cylinder and the telescopic rod, a cleaning plate is fixedly connected to the lower side of the telescopic rod, a control rod is fixedly connected to the outer side of the control ring, a first spring is fixedly connected between the control rod and the side wall of the annular control groove, a plurality of motors are fixedly connected to the upper side of the bracket, a rotating shaft is fixedly connected to the output ends of the plurality of motors, a rotating plate is fixedly connected to the outer side of the rotating shaft, and the rotating plate and the control rod are abutted against each other.

[0010] Preferably, a cleaning component for reducing the thickness of the gel layer is installed in the cleaning plate, and the cleaning component includes a cleaning groove opened on the side wall of the cleaning plate, an L-shaped plate is slidably connected to the cleaning groove up and down, and a transmission rod is rotatably connected to the upper side of the L-shaped plate, and the transmission rod passes through the cleaning plate. A sliding rod is fixedly connected to the side wall of the transmission rod, and a threaded groove is opened on the inner wall of the tank body. The sliding rod and the threaded groove are slidably connected, and a control tube is fixedly connected to the upper side of the cleaning groove.

[0011] Preferably, a second trapezoidal plate is fixedly connected to the upper inner side of the L-shaped plate, a baffle is slidably connected in the cleaning groove, a third spring is fixedly connected between the baffle and the cleaning groove, and a first trapezoidal plate is fixedly connected to the lower side of the baffle.

[0012] Preferably, a cavity is opened in the tank body, the control tube passes through the side wall of the cavity and is fixedly connected to the cavity, the control tube is located in the cavity and is fixedly connected to a pressure pump, the pressure pump is fixedly connected to a discharge pipe, and a sensor is fixedly connected to the cavity.

[0013] Preferably, the side surfaces of the first trapezoidal plate and the second trapezoidal plate are both smooth.

[0014] Preferably, a plurality of groups of rubber protrusions are fixedly connected to the outer side of the movable ring.

[0015] The beneficial effects of the present invention are:

[0016] 1. First, when the whey wastewater is concentrated, the installation and fixing operation of the filter membrane is completed by moving the ring, threaded rod and other structures. The operation is simple and the fixing effect is good. Then, when the filter membrane is used for filtering, the motor is started to drive the control rod and the control ring to rotate back and forth, thereby driving the cleaning plate to rotate back and forth, forming a simple cleaning effect on the surface of the filter membrane, preventing excessive accumulation on the surface of the filter membrane and affecting the normal filtering effect of the filter membrane;

[0017] 2. Secondly, when the filter membrane is used for filtering, a gel layer will be formed on the outside of the filter membrane. When the gel layer is thick, it will greatly affect the normal filtering effect of the filter membrane. Therefore, during the back and forth rotation of the cleaning plate, the cleaning groove on the front side of the cleaning plate is used to intermittently discharge the gel layer solution to slow down the rate of gel layer generation, thereby improving the working effect of the filter membrane;

[0018] 3. When discharging the gel layer material, the weight of each discharged solution is detected by the sensor. When it is detected that the gel in the liquid gradually increases, the corresponding staff can be reminded that it is necessary to stop working and remove the gel;

[0019] 4. The whey wastewater discharged in the cheese production process has a whey protein concentration of 5% before treatment. After being treated and concentrated by the equipment of the present invention, the whey protein concentration can reach 25%. In this way, powder can be made through crystallization to produce whey protein powder products, achieving zero emission in cheese production and realizing the full industrial chain production of cheese;

[0020] 5. The whey wastewater discharged in the cheese production process has a COD content of up to 800 mg / L before treatment. After being treated by the equipment of the present invention, the COD content can be reduced to 200-400 mg / L, which meets the B-level or above standard of GB / T 31962-2015 "Water Quality Standard for Sewage Discharge into Urban Sewers". BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a membrane separation and concentration device for whey wastewater, a by-product of cheese production, proposed by the present invention;

[0022] Figure 2 This is a schematic diagram of the connection between the motor and the tank in a membrane separation and concentration device for whey wastewater, a by-product of cheese production, proposed by the present invention;

[0023] Figure 3 It is a top view and cross-sectional connection schematic diagram of a rotating tank in a membrane separation and concentration device for whey wastewater, a by-product of cheese production, proposed by the present invention;

[0024] Figure 4This is a cross-sectional connection schematic diagram of a tank body in a membrane separation and concentration device for whey wastewater, a by-product of cheese production, proposed by the present invention;

[0025] Figure 5 This is a cross-sectional connection schematic diagram of another angle of the tank body in the membrane separation and concentration equipment for whey wastewater, a by-product of cheese production, proposed by the present invention;

[0026] Figure 6 This is a schematic diagram of the connection between the rotating cylinder and the cleaning plate in a membrane separation and concentration device for whey wastewater, a by-product of cheese production, proposed by the present invention;

[0027] Figure 7 A schematic diagram of the side view and cross-section connection of a cleaning tank in a membrane separation and concentration device for whey wastewater, a by-product of cheese production, proposed by the present invention;

[0028] Figure 8 This is a schematic diagram of the connection between the L-shaped plate and the baffle in a membrane separation and concentration device for whey wastewater, a by-product of cheese production, proposed by the present invention;

[0029] Fig. 9 This is a schematic diagram of the connection of the cavities in a membrane separation and concentration device for whey wastewater, a by-product of cheese production, proposed by the present invention.

[0030] In the figure: 1 controller, 2 tank body, 3 connecting pipe, 4 bracket, 5 bolt, 6 rotating ring, 7 motor, 8 rotating shaft, 9 rotating plate, 10 nut, 11 first spring, 12 rotating groove, 13 threaded rod, 14 sleeve, 15 gear, 16 internal gear ring, 17 rotating cylinder, 18 cleaning plate, 19 telescopic rod, 20 annular groove, 21 moving ring, 22 annular control groove, 23 control ring, 24 discharge pipe, 25 control rod, 26 threaded groove, 27 connecting plate, 28 second spring, 29 control pipe, 30 sliding rod, 31 transmission rod, 32 cleaning groove, 33 L-shaped plate, 34 baffle, 35 first trapezoidal plate, 36 second trapezoidal plate, 37 third spring, 38 cavity, 39 pressure pump, 40 sensor. DETAILED DESCRIPTION

[0031] See also Figure 1-Figure 9 , a membrane separation and concentration device for whey wastewater, a byproduct of cheese production, comprises a controller 1, a bracket 4 and a tank body 2, wherein the controller 1 is fixedly mounted on the upper side of the bracket 4, the number of the tank bodies 2 is multiple groups, the multiple groups of tank bodies 2 are arranged in groups of two, and the two tank bodies 2 in each group are arranged opposite to each other, multiple groups of through holes are opened on the outer sides of the multiple groups of tank bodies 2, bolts 5 are sleeved in the multiple groups of through holes, nuts 10 are threadedly sleeved on the outer sides of the bolts 5, the multiple groups of tank bodies 2 are fixedly connected with a connecting pipe 3 on the side away from each other, and the connecting pipe 3 is fixedly connected to the controller 1 on the side away from the tank body 2;

[0032] First, the controller 1 can not only control the flow rate of the fluid, but also adjust the pressure of the fluid flowing into the tank body 2. The controller 1 includes a pump body and an intelligent display screen for controlling the switch and size of the pump body. When the whey wastewater is separated and concentrated, the filter membrane is placed between two adjacent tank bodies 2, the bolt 5 is inserted into the through hole of the two adjacent tank bodies 2, the nut 10 is turned, the two tank bodies 2 are installed together, the controller 1 is started, and the whey wastewater is injected into the tank body 2 to start the concentration operation. The above are all prior arts and no redundant elaboration is made;

[0033] like Figure 3 , Figure 4 , a clamping assembly for clamping and fixing the filter membrane is installed in each group of tank bodies 2, and the clamping assembly includes an annular groove 20 opened on the outside of the tank body 2, and a moving ring 21 is slidably sleeved in the annular groove 20, and multiple groups of threaded rods 13 are rotatably connected to the upper side of the moving ring 21, and multiple groups of rotating grooves 12 are opened on the side wall of the tank body 2, and multiple groups of threaded rods 13 penetrate the rotating grooves 12 and are threadedly connected to the rotating grooves 12, and multiple groups of threaded rods 13 are located in the rotating grooves 12 and are slidably sleeved with sleeves 14 up and down, and a gear 15 is fixedly sleeved on the outside of the sleeve 14, and a rotating ring 6 is rotatably sleeved on the outside of the tank body 2, and an inner gear ring 16 is fixedly sleeved on the inner side of the rotating ring 6, and the inner gear ring 16 is meshed with the gear 15, and multiple groups of rubber protrusions are fixedly connected to the outside of the moving ring 21, so as to improve the friction of the moving ring 21, so as to better complete the clamping and fixing operation of the filter membrane;

[0034] After the two tank bodies 2 are installed, the rotating ring 6 is rotated, and the rotating ring 6 drives the inner gear ring 16 to rotate, the inner gear ring 16 drives the gear 15 to rotate, the gear 15 drives the sleeve 14 to rotate, and the sleeve 14 drives the threaded rod 13 to rotate. Since the threaded rod 13 and the rotating groove 12 are threadedly connected, the threaded rod 13 will move up and down relative to the tank body 2 during the rotation of the threaded rod 13, and the threaded rod 13 drives the moving ring 21 to move until the two moving rings 21 are against the filter membrane, thereby completing the installation and fixing operation of the filter membrane.

[0035] like Figure 4 , Figure 5 , Figure 6A cleaning assembly for cleaning particles on the surface of the filter membrane is installed in the tank body 2, and the cleaning assembly includes an annular control groove 22 opened in the tank body 2, a control ring 23 is rotatably sleeved in the annular control groove 22, a rotating cylinder 17 is fixedly connected in the control ring 23 through a connecting plate 27, a telescopic rod 19 is slidably sleeved in the rotating cylinder 17, a second spring 28 is fixedly connected between the rotating cylinder 17 and the telescopic rod 19, a cleaning plate 18 is fixedly connected to the lower side of the telescopic rod 19, the cleaning plate 18 and the filter membrane are against each other, a control rod 25 is fixedly connected to the outer side of the control ring 23, a first spring 11 is fixedly connected between the control rod 25 and the side wall of the annular control groove 22, a plurality of motors 7 are fixedly connected to the upper side of the bracket 4, a rotating shaft 8 is fixedly connected to the output end of the plurality of motors 7, a rotating plate 9 is fixedly connected to the outer side of the rotating shaft 8, and the rotating plate 9 and the control rod 25 are against each other;

[0036] When the whey wastewater is concentrated, the motor 7 is started, and the motor 7 drives the rotating shaft 8 and the rotating plate 9 to rotate. During the rotation of the rotating plate 9, when the rotating plate 9 and the control rod 25 are against each other, the rotating plate 9 will drive the control rod 25 to rotate around the tank body 2. The control rod 25 compresses the first spring 11 and drives the control ring 23 to rotate. The control ring 23 drives the rotating cylinder 17 to rotate through the connecting plate 27. The rotating cylinder 17 drives the telescopic rod 19 to rotate. The telescopic rod 19 drives the cleaning plate 18 to rotate. When the rotating plate 9 and the control rod 25 are disconnected, the first spring 11 is pressed against the rotating plate 9. Under the action of 11, the control rod 25 drives the control ring 23 to rotate in the opposite direction of the previous rotation direction, thereby causing the control rod 25 to drive the control ring 23 to rotate back and forth in the process of the rotating shaft 8 driving the rotating plate 9 to rotate. In the above working process, the second spring 28 is always in a compressed state, the cleaning plate 18 is always against the filter membrane, and the cleaning plates 18 on the upper and lower sides of the filter membrane are symmetrically arranged with the filter membrane as the center line, which will not cause damage to the filter membrane in the vertical direction. The cleaning plates 18 and the filter membrane are against each other, which will clean the deposits on the surface of the filter membrane and maintain the normal working effect of the filter membrane.

[0037] like Figure 6 , Figure 7 , Figure 8 A cleaning assembly for reducing the thickness of the gel layer is installed in the cleaning plate 18, and the cleaning assembly includes a cleaning groove 32 opened on the side wall of the cleaning plate 18, an L-shaped plate 33 is slidably connected up and down in the cleaning groove 32, and a transmission rod 31 is rotatably connected to the upper side of the L-shaped plate 33, and the transmission rod 31 runs through the cleaning plate 18, and a sliding rod 30 is fixedly connected to the side wall of the transmission rod 31, and a threaded groove 26 is opened on the inner side wall of the tank body 2, and the sliding rod 30 is slidably connected to the threaded groove 26, and a control tube 29 is fixedly connected to the upper side of the cleaning groove 32;

[0038] First, from Figure 8As can be seen from the figure, the width of the side of the L-shaped plate 33 located outside the cleaning groove 32 is greater than the width of the side located inside the cleaning groove 32. Therefore, during the up and down movement of the L-shaped plate 33, the opening and closing control operation of the cleaning groove 32 can be completed. Secondly, during the back and forth rotation of the cleaning plate 18, under the action of the thread groove 26 and the slide rod 30, due to the special shape of the thread groove 26, such as Figure 5 As shown, the slide bar 30 and the threaded groove 26 are slidably connected, so the L-shaped plate 33 will move up and down relative to the cleaning plate 18 during the back and forth movement of the cleaning plate 18. During the rotation of the cleaning plate 18, the cleaning plate 18 is located in the gel layer on the outside of the filter membrane. Therefore, the cleaning groove 32 is also in the gel layer. During the up and down movement of the L-shaped plate 33, the plate outside the L-shaped plate 33 is located on the outside of the cleaning groove 32. Therefore, during the up and down movement of the L-shaped plate 33, the upward movement of the L-shaped plate 33 is used as an example for explanation. At the beginning, the cleaning groove 32 is in a state of communication with the gel layer. As the L-shaped plate 33 moves, the L-shaped plate 33 will close the cleaning groove 32, so that the cleaning groove 32 is in a closed space, and then the liquid in the cleaning groove 32 is discharged from the control tube 29 (at this time, the positional relationship between the L-shaped plate and the cleaning plate 18 is as shown in FIG. Figure 7 As shown in the figure, as the L-shaped plate 33 moves downward, the cleaning groove 32 is gradually opened, the gel layer and the cleaning groove 32 are connected, and the material in the gel layer enters the cleaning groove 32 again. Then, as the L-shaped plate 33 moves up and down, the material in the gel layer is discharged, the speed of gel layer generation is slowed down, and the normal filtering effect of the filter membrane is ensured.

[0039] like Figure 8 A second trapezoidal plate 36 is fixedly connected to the upper side of the L-shaped plate 33, a baffle 34 is slidably connected in the cleaning groove 32, the baffle 34 is located at the lower side of the control tube 29 and abuts against the control tube 29, a third spring 37 is fixedly connected between the baffle 34 and the cleaning groove 32, a first trapezoidal plate 35 is fixedly connected to the lower side of the baffle 34, the first trapezoidal plate 35 and the second trapezoidal plate 36 are arranged oppositely, and the sides of the first trapezoidal plate 35 and the second trapezoidal plate 36 are both smooth, reducing the friction between the first trapezoidal plate 35 and the second trapezoidal plate 36;

[0040] During the up and down movement of the L-shaped plate 33, when the first trapezoidal plate 35 and the second trapezoidal plate 36 abut against each other, Figure 7 Based on the direction, the second trapezoidal plate 36 will move to the left, and the second trapezoidal plate 36 drives the baffle 34 to move to the left. While the baffle 34 stretches the third spring 37, it gradually disconnects from the control tube 29. The control tube 29 is opened, and the liquid inside the cleaning groove 32 can be discharged from the control tube 29 (at this time, the cleaning groove 32 is in a sealed state, and the liquid on the outside of the cleaning plate 18 will not be discharged through the cleaning groove 32).

[0041] like Fig. 9A cavity 38 is opened in the tank body 2, a control pipe 29 passes through the side wall of the cavity 38 and is fixedly connected to the cavity 38, the control pipe 29 is located in the cavity 38 and is fixedly connected to a pressure pump 39, the other end of the pressure pump 39 away from the control pipe 29 is fixedly connected to a discharge pipe 24, the discharge pipe 24 passes through the side wall of the cavity 38, a sensor 40 is fixedly connected in the cavity 38, and the sensor 40 is located on the side wall of the discharge pipe 24 and abuts against the discharge pipe 24;

[0042] First, during the concentration of whey wastewater, the pressure pump 39 is always in the on state. When the control tube 29 is opened, the pressure pump 39 can suck out the liquid inside the cleaning tank 32 and then discharge it through the discharge pipe 24. Secondly, the sensor 40 is a resistive pressure sensor in real life. Compared with other sensors, the resistive pressure sensor has higher accuracy. When the liquid is discharged from the discharge pipe 24, the liquid is located on the upper side of the sensor 40. In this process, when there are more colloids in the liquid, the liquid density is larger, resulting in a heavier unit volume of liquid and a heavier object. The smaller the signal generated by the sensor 40 (the volume of liquid discharged from the cleaning tank 32 is set to be constant each time, so when the volume is constant, the greater the density of the object, the greater the weight), and then a detection operation can be formed for each discharge of liquid. When it is detected that the colloid in the liquid is gradually increasing, the corresponding staff can be reminded that they need to stop working and remove the colloid.

[0043] In the present invention, when the whey wastewater is separated and concentrated, the filter membrane is placed between two adjacent tank bodies 2, the bolt 5 is inserted into the through hole of the two adjacent tank bodies 2, the nut 10 is rotated, the two tank bodies 2 are installed together, the rotating ring 6 is rotated, the rotating ring 6 drives the inner gear ring 16 to rotate, the inner gear ring 16 drives the gear 15 to rotate, the gear 15 drives the sleeve 14 to rotate, the sleeve 14 drives the threaded rod 13 to rotate, and since the threaded rod 13 and the rotating groove 12 are threadedly connected, during the rotation of the threaded rod 13, The threaded rod 13 moves up and down relative to the tank body 2, and the threaded rod 13 drives the moving ring 21 to move until the two moving rings 21 and the filter membrane are in contact with each other, thereby completing the installation and fixing operation of the filter membrane, starting the controller 1, starting to inject whey wastewater into the tank body 2, starting the concentration operation, starting the motor 7, and the motor 7 drives the rotating shaft 8 and the rotating plate 9 to rotate. During the rotation of the rotating plate 9, when the rotating plate 9 and the control rod 25 are in contact with each other, the rotating plate 9 will drive the control rod 25 to rotate around the tank body 2 as the center, and the control rod 25 While compressing the first spring 11, the control ring 23 is driven to rotate. The control ring 23 drives the rotating cylinder 17 to rotate through the connecting plate 27. The rotating cylinder 17 drives the telescopic rod 19 to rotate through the second spring 28. The telescopic rod 19 drives the cleaning plate 18 to rotate. When the rotating plate 9 and the control rod 25 are disconnected, under the action of the first spring 11, the control rod 25 drives the control ring 23 to rotate in the opposite direction of the previous rotation direction, thereby causing the control rod 25 to drive the control ring 23 to rotate back and forth in the process of the rotating plate 9 driven by the rotating shaft 8. In the above working process, the second spring 28 is always in a compressed state, the cleaning plate 18 is always against the filter membrane, and the cleaning plates 18 on the upper and lower sides of the filter membrane are symmetrically arranged with the filter membrane as the center line, which will not cause damage to the filter membrane in the vertical direction. The cleaning plate 18 and the filter membrane are against each other, which will clean the deposits on the surface of the filter membrane and maintain the normal working effect of the filter membrane. In the process of the cleaning plate 18 rotating back and forth, under the action of the thread groove 26 and the sliding rod 30, due to the special shape of the thread groove 26, such as Figure 5 As shown, the slide bar 30 is slidably connected to the threaded groove 26, so the process of the cleaning plate 18 moving back and forth will cause the L-shaped plate 33 to move up and down relative to the cleaning plate 18. During the rotation of the cleaning plate 18, the cleaning plate 18 is in the gel layer outside the filter membrane, so the cleaning groove 32 is also in the gel layer. During the up and down movement of the L-shaped plate 33, the plate outside the L-shaped plate 33 is located outside the cleaning groove 32. Therefore, during the up and down movement of the L-shaped plate 33, the upward movement of the L-shaped plate 33 is used as an example for explanation. At the beginning, the cleaning groove 32 is in a state of communication with the gel layer. As the L-shaped plate 33 moves, the cleaning groove 32 is in a state of communication with the gel layer. Figure 6Based on the direction of the L-shaped plate 33, the cleaning tank 32 is closed, so that the cleaning tank 32 is in a closed space, and then the liquid in the cleaning tank 32 is discharged from the control tube 29. Then, in the process of the L-shaped plate 33 moving downward, the cleaning tank 32 is gradually opened, the gel layer and the cleaning tank 32 are connected, and the material in the gel layer enters the cleaning tank 32 again. Then, in the process of the L-shaped plate 33 moving up and down, the discharge operation of the material in the gel layer is completed, the speed of the gel layer generation is slowed down, and the normal filtering effect of the filter membrane is ensured. In the process of concentrating the whey wastewater, the pressure pump 39 is always in the open state. When the control tube 29 is opened, the pressure pump 39 can clean the cleaning tank 32. The internal liquid is sucked out and then discharged through the discharge pipe 24. Secondly, the sensor 40 is a resistive pressure sensor in real life. Compared with other sensors, the resistive pressure sensor has higher accuracy. When the liquid is discharged from the discharge pipe 24, the liquid is located on the upper side of the sensor 40. In this process, when there is more colloid in the liquid, the liquid density is larger, resulting in a heavier unit volume of liquid and a heavier object. The smaller the signal generated by the sensor 40 (the volume of liquid discharged from the cleaning tank 32 is constant each time), a detection operation can be formed for each discharge of liquid. When it is detected that the colloid in the liquid is gradually increasing, the corresponding staff can be reminded that they need to stop working and remove the colloid.

Claims

1. A membrane separation and concentration device for whey wastewater, a by-product of cheese production, comprising a controller (1), a bracket (4) and a tank (2), characterized in that: A clamping assembly for clamping and fixing the filter membrane is installed in each group of the tank bodies (2), and the clamping assembly includes an annular groove (20) opened on the side wall of the tank body (2), a moving ring (21) is slidably sleeved in the annular groove (20), and the upper side of the moving ring (21) is rotatably connected to multiple groups of threaded rods (13), and the side wall of the tank body (2) is opened with multiple groups of rotating grooves (12), and multiple groups of the threaded rods (13) penetrate the rotating grooves (12) and are threadedly connected to the rotating grooves (12), and multiple groups of the threaded rods (13) are located in the rotating grooves (12) and are slidably sleeved with sleeves (14), and the outer side of the sleeve (14) is fixedly sleeved with a gear (15), and the outer side of the tank body (2) is rotatably sleeved with a rotating ring (6), and the inner side of the rotating ring (6) is fixedly sleeved with an inner gear ring (16), and the inner gear ring (16) and the gear (15) are meshed.

2. The membrane separation and concentration equipment for cheese production by-product whey wastewater according to claim 1, characterized in that: A cleaning assembly for cleaning particles on the surface of the filter membrane is installed in the tank body (2), and the cleaning assembly comprises an annular control groove (22) provided in the tank body (2), a control ring (23) is rotatably sleeved in the annular control groove (22), a rotating cylinder (17) is fixedly connected in the control ring (23) via a connecting plate (27), a telescopic rod (19) is slidably sleeved in the rotating cylinder (17), a second spring (28) is fixedly connected between the rotating cylinder (17) and the telescopic rod (19), and the telescopic rod (19) is rotatably sleeved in the rotating cylinder (17). A cleaning plate (18) is fixedly connected to the lower side of the retracting rod (19), a control rod (25) is fixedly connected to the outer side of the control ring (23), a first spring (11) is fixedly connected between the control rod (25) and the side wall of the annular control groove (22), a plurality of motors (7) are fixedly connected to the upper side of the bracket (4), the output ends of the plurality of motors (7) are fixedly connected to rotating shafts (8), a rotating plate (9) is fixedly connected to the outer side of the rotating shaft (8), and the rotating plate (9) and the control rod (25) are in contact with each other.

3. The membrane separation and concentration equipment for cheese production by-product whey wastewater according to claim 2, characterized in that: A cleaning assembly for reducing the thickness of the gel layer is installed in the cleaning plate (18), and the cleaning assembly includes a cleaning groove (32) provided on the side wall of the cleaning plate (18), an L-shaped plate (33) is slidably connected up and down in the cleaning groove (32), a transmission rod (31) is rotatably connected to the upper side of the L-shaped plate (33), the transmission rod (31) is arranged to penetrate the cleaning plate (18), a sliding rod (30) is fixedly connected to the side wall of the transmission rod (31), a threaded groove (26) is provided on the inner side wall of the tank body (2), the sliding rod (30) and the threaded groove (26) are slidably connected, and a control tube (29) is fixedly connected to the upper side of the cleaning groove (32).

4. The membrane separation and concentration equipment for cheese production by-product whey wastewater according to claim 3, characterized in that: A second trapezoidal plate (36) is fixedly connected to the upper inner side of the L-shaped plate (33), a baffle (34) is slidably connected to the inner side of the cleaning groove (32), a third spring (37) is fixedly connected between the baffle (34) and the cleaning groove (32), and a first trapezoidal plate (35) is fixedly connected to the lower side of the baffle (34).

5. The membrane separation and concentration equipment for cheese production by-product whey wastewater according to claim 4, characterized in that: A cavity (38) is opened in the tank body (2), the control tube (29) passes through the side wall of the cavity (38) and is fixedly connected to the cavity (38), the control tube (29) is located in the cavity (38) and is fixedly connected to a pressure pump (39), the pressure pump (39) is fixedly connected to a discharge pipe (24), and a sensor (40) is fixedly connected to the cavity (38).

6. The membrane separation and concentration equipment for cheese production by-product whey wastewater according to claim 5, characterized in that: The side surfaces of the first trapezoidal plate (35) and the second trapezoidal plate (36) are both smooth.

7. The membrane separation and concentration equipment for whey wastewater, a byproduct of cheese production, according to claim 6, characterized in that: The outer side of the movable ring (21) is fixedly connected with a plurality of groups of rubber protrusions.

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