A whey protein separation and purification apparatus

Abstract

The application relates to a whey protein separation and purification device and relates to the technical field of separation and purification devices, which comprises a casing, a lifting seat slidingly connected in the casing, a sealing cover arranged on the inner top wall of the casing, an opening arranged at one end of the lifting seat, liquid inlet pipes and liquid outlet pipes arranged on two opposite side walls, a ceramic filter plate clamped at the top end of the lifting seat, a plurality of vertical through liquid collecting holes, a liquid collecting head connected with all the liquid collecting holes, a liquid collecting pipe slidingly connected with the top end of the casing and fixedly connected with the top end of the liquid collecting head, flush spray pipes arranged on the two opposite side walls in the casing, vertically arranged towards the ceramic filter plate, connected with a pressure water source, a liquid storage tank arranged on the casing, connected with the liquid outlet pipes and used for containing liquid milk, and a circulating pump with an inlet connected with the bottom of the liquid storage tank through a pipeline and an outlet connected with the liquid inlet pipe. The application has the effect of better cleaning the ceramic membrane.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of separation and purification devices, in particular to a whey protein separation and purification device. BACKGROUND

[0002] Whey protein is not only easy to digest, but also has high biological value, high digestibility, high protein efficacy ratio and high utilization rate. Supplementing whey protein is of great importance to ordinary people. For a long time, whey protein has been a by-product of cheese processing. The heat treatment process in the processing process inevitably causes denaturation, aggregation and even precipitation of whey protein, and some inhibitor components in it also have a negative impact, such as the fat globule membrane in fat inhibiting the foaming property of whey protein. Only pure and natural whey protein can obtain good functional properties.

[0003] With the development of science and technology, separation and purification equipment for liquid milk has appeared. The relatively advanced technology is to use ceramic membranes for a kind of "cross-flow filtration" form of fluid separation. Water and whey protein can pass through the micropores of the ceramic membrane, while larger casein and fat are intercepted to realize the separation and purification of whey protein.

[0004] For the related technology in the above, the common ceramic membrane adopts a circular tube structure. After a certain degree of filtration, the surface will be blocked by the retained material. The conventional method is to perform backwashing cleaning. The separation and purification equipment is provided with a backwashing component. However, based on the backwashing principle and the shape of the ceramic membrane, it is difficult to completely clean the ceramic membrane only by backwashing. SUMMARY

[0005] In order to improve the cleaning effect of the ceramic membrane, the present application provides a whey protein separation and purification device.

[0006] The whey protein separation and purification device provided by the present application adopts the following technical scheme:

[0007] A whey protein separation and purification device, comprising:

[0008] A casing;

[0009] A lifting seat slidingly connected in the casing;

[0010] A sealing cover provided on the inner top wall of the casing, one end of the sealing cover facing the lifting seat is provided with an opening, and liquid inlet pipes and liquid outlet pipes are provided on the two opposite side walls;

[0011] A ceramic filter plate is clamped at the top end of the lifting seat and is provided with a plurality of vertical through liquid collecting holes. A liquid collecting head communicating with all the liquid collecting holes is clamped at the top end of the ceramic filter plate. The liquid collecting head is fixedly connected with a liquid collecting pipe slidingly penetrating out of the top end of the casing.

[0012] The flushing nozzle is arranged on two opposite side walls of the casing and is vertically directed to the ceramic filter plate below the bottom end of the sealing cover and is connected to a water pressure source;

[0013] The liquid storage tank is arranged on the casing and is connected to the liquid outlet pipe for storing the liquid milk;

[0014] The circulating pump has an inlet connected to the bottom of the liquid storage tank through a pipeline and an outlet connected to the liquid inlet pipe;

[0015] The suction pump is arranged on the casing and has an inlet connected to the liquid collecting pipe.

[0016] According to the above technical scheme, when the retained substances on the ceramic filter plate are relatively large, backwashing can be performed first, then the lifting seat is lowered, the ceramic filter plate is moved out of the sealing cover, and the flushing nozzle can flush both sides of the ceramic filter plate to flush the retained substances that are difficult to clean by backwashing. Meanwhile, the tubular ceramic membrane is changed into a plate-shaped ceramic filter plate, which makes the ceramic filter plate easier to clean and improves the cleaning effect of the separation and purification device on the ceramic membrane.

[0017] Optionally, the combination of the casing, the lifting seat, the sealing cover and the ceramic filter plate is provided with multiple groups, multiple liquid inlet pipes are connected to a liquid inlet main pipe, multiple liquid outlet pipes are connected to a liquid outlet main pipe, and an adjusting valve is arranged on the liquid outlet main pipe.

[0018] According to the above technical scheme, multiple ceramic filter plates can improve the filtering efficiency, and by changing the opening degree of the adjusting valve, the pressure in the sealing cover can be adjusted and the filtering speed can be changed.

[0019] Optionally, a partition plate is connected to the inner wall of the sealing cover and is arranged on both sides of the ceramic filter plate to form a serpentine channel on both sides of the ceramic filter plate.

[0020] According to the above technical scheme, the serpentine channel can increase the flow path of the liquid milk in the sealing cover, increase the contact time with the ceramic filter plate and improve the filtering efficiency.

[0021] Optionally, the liquid inlet pipe is arranged at the top end of the side wall of the sealing cover and the liquid outlet pipe is arranged at the bottom end of the side wall of the sealing cover.

[0022] According to the above technical scheme, the retained substances with a relatively large density will sink downward in the sealing cover, and the liquid outlet pipe arranged at the bottom end can make the retained substances more easily discharged from the sealing cover.

[0023] Optionally, the lifting seat comprises:

[0024] The seat plate is provided with a clamping groove at the top end for clamping the ceramic filter plate;

[0025] The lifting rod is fixedly connected to the bottom end surface of the seat plate and penetrates out of the casing downward at the bottom end;

[0026] The telescopic cylinder is hinged between the lifting rod and the bottom of the housing.

[0027] By adopting the above technical solution, the extension and retraction of the telescopic cylinder can be used to pull the lifting rod to raise and lower it, and the lifting rod plays a guiding role.

[0028] Optionally, the two inner sidewalls of the housing are provided with receiving tubes that connect to the external space of the housing, and the flushing nozzle is disposed inside the receiving tubes; the end of the receiving tube facing the inside of the housing is provided with an opening and closing door.

[0029] By adopting the above technical solution, the installation of the receiving pipe and the opening and closing door can separate the flushing nozzle from the internal space of the machine casing when not performing flushing operations, and at the same time, it also makes it difficult for debris from the external environment to enter the machine casing.

[0030] Optionally, the separation and purification device further includes a linkage component, wherein the opening and closing door is slidably connected to the receiving tube, and the linkage component includes:

[0031] The rack and pinion mechanism connects to the door.

[0032] The transmission gear is rotatably connected to the receiving tube and meshes with the opening and closing rack;

[0033] The guide rod is fixedly connected inside the housing;

[0034] The linkage frame is slidably connected to the guide rod and is vertically aligned with the lifting seat.

[0035] The transmission rack is fixedly connected to the linkage frame and meshes with the transmission gear.

[0036] A tension spring is fitted onto the guide rod, with its two ends connected to the inner top wall of the housing and the linkage frame, respectively.

[0037] By adopting the above technical solution, when the lifting seat is lowered, it will press the linkage frame down, stretch the tension spring, and the transmission rack will move down to make the transmission gear rotate. The rotation of the transmission gear will then drive the opening and closing rack to rise, so that the opening and closing door can be raised normally, allowing the flushing spray pipe to flush the lowered ceramic filter plate. When the lifting seat is raised, the tension spring can pull the linkage frame up, thereby causing the opening and closing door to close again.

[0038] Optionally, the flushing nozzle is equipped with a solenoid valve, the inner wall of the housing is equipped with a micro switch electrically connected to the solenoid valve, and a trigger bar is connected to the linkage frame;

[0039] When the linkage frame descends, the trigger bar will press down to trigger the micro switch, which in turn energizes and opens the solenoid valve.

[0040] Through the above technical scheme, when the trigger bar is pressed down to lower the micro switch, the flushing nozzle is aimed at the bottom of the ceramic filter plate, and as the ceramic filter plate continues to descend, the flushing pipe can complete the first cleaning of the ceramic filter plate from bottom to top; the trigger bar rises until it is separated from the micro switch, and this process is the second cleaning of the ceramic filter plate from top to bottom by the flushing pipe, and the flushing operation of the ceramic filter plate is completed, thereby improving the flushing effect.

[0041] Optionally, the inner bottom wall of the shell is inclined, and the lowest side is provided with a cleaning door.

[0042] Through the above technical scheme, the retained substances and liquid flowing down from the flushing ceramic filter plate can automatically flow to the lowest end of the shell, and the mixed liquid in the shell can be discharged by the cleaning door, and the inner bottom of the shell can be conveniently cleaned by the worker.

[0043] Optionally, the liquid storage tank is provided with an air pipe, and the air pipe is provided with a filter core.

[0044] Through the above technical scheme, as the filtration is carried out, the liquid in the liquid storage tank is reduced, the air pipe can guide the external air into the liquid storage tank to balance the air pressure, and the filter core can block the impurities in the air.

[0045] In summary, the present application has at least one of the following beneficial technical effects:

[0046] 1. When there are more retained substances on the ceramic filter plate, back flushing can be carried out first, and then the lifting seat is lowered, the ceramic filter plate is moved out of the sealing cover, and the flushing nozzle can flush both sides of the ceramic filter plate, thereby flushing the retained substances that are difficult to clean by back flushing, changing the tubular ceramic membrane into a plate-shaped ceramic filter plate, and making the ceramic filter plate easier to clean, thereby improving the cleaning effect of the separation and purification device on the ceramic membrane;

[0047] 2. Multiple groups of ceramic filter plates can improve the filtration efficiency, and by changing the opening degree of the regulating valve, the pressure in the sealing cover can be adjusted, and the filtration speed can be changed;

[0048] 3. The serpentine channel can increase the flow path of the liquid milk entering the sealing cover, increase the contact time with the ceramic filter plate, and improve the filtration efficiency;

[0049] 4. When the lifting seat is lowered, the linkage frame is pressed downward, the tension spring is stretched, the transmission rack is lowered to make the transmission gear rotate, the transmission gear rotates to drive the opening and closing rack to rise, and the opening and closing door can normally rise, so that the flushing nozzle can flush the lowered ceramic filter plate; when the lifting seat is raised, the tension spring can pull the linkage frame to move upward, and then the opening and closing door is closed again.

[0050] 5. When the trigger bar is pressed down and the micro switch is triggered, the flushing nozzle is aimed at the bottom of the ceramic filter plate. As the ceramic filter plate continues to descend, the flushing nozzle can complete the first cleaning of the ceramic filter plate from bottom to top. When the trigger bar is lifted until it is separated from the micro switch, the flushing nozzle can complete the second cleaning of the ceramic filter plate from top to bottom, thus completing the flushing operation of the ceramic filter plate and improving the flushing effect. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 is a schematic diagram of the overall structure of the embodiment of the application;

[0052] Figure 2 is a schematic diagram of the partial section of the embodiment of the application;

[0053] Figure 3 is a schematic diagram of the partial section of the embodiment of the application; Figure 2 is a schematic diagram of the partial section of the embodiment of the application;

[0054] Figure 4 is a schematic diagram of the position relationship between the sealing covers of the embodiment of the application;

[0055] Figure 5 is an exploded view for showing the connection relationship between the sealing cover, the ceramic filter plate and the seat plate;

[0056] Figure 6 is a partial section view for showing the connection relationship between the sealing cover and the ceramic filter plate;

[0057] In the figure, 1 is a machine shell; 11 is a containing tube; 12 is an opening and closing door; 13 is a cleaning door; 2 is a lifting seat; 21 is a seat plate; 22 is a lifting rod; 23 is a telescopic cylinder; 3 is a sealing cover; 31 is a liquid inlet pipe; 32 is a liquid outlet pipe; 33 is a liquid inlet main pipe; 34 is a liquid outlet main pipe; 35 is an adjusting valve; 36 is a partition plate; 4 is a ceramic filter plate; 41 is a liquid collecting hole; 42 is a liquid collecting head; 43 is a liquid collecting pipe; 5 is a flushing nozzle; 51 is an electromagnetic valve; 52 is a micro switch; 6 is a liquid storage tank; 61 is a breather pipe; 62 is a filter core; 7 is a circulating pump; 8 is a suction pump; 9 is a linkage assembly; 91 is a trigger bar; 92 is a transmission gear; 93 is a guide rod; 94 is a linkage frame; 941 is a trigger bar; 95 is a transmission rack; 96 is a tension spring. DETAILED DESCRIPTION

[0058] The following will be described in detail with reference to the accompanying drawings. Figure 1 - the accompanying drawings Figure 6 The application will be described in further detail.

[0059] The application provides a whey protein separation and purification device, which refers to Figures 1-3, including the shell 1, the lifting seat 2, the sealing cover 3, the ceramic filter plate 4, the flushing nozzle 5, the liquid storage tank 6, the circulating pump 7, the suction pump 8 and the linkage assembly 9. The shell 1 is arranged on the working ground; the liquid storage tank 6 is used for containing liquid milk and is arranged on the shell 1; the lifting seat 2 is slidingly connected in the shell 1; the ceramic filter plate 4 is inserted on the lifting seat 2 and is connected with the liquid collecting head 42 and the liquid collecting pipe 43 at the top end, the liquid collecting pipe 43 penetrates the shell 1 upwardly and is used for discharging the filtered liquid containing whey protein; the lifting seat 2 can drive the ceramic filter plate 4 to enter or exit the sealing cover 3; the flushing nozzle 5 is arranged on both sides of the shell 1 and is used for flushing the ceramic filter plate 4; the circulating pump 7 is connected between the liquid storage tank 6 and the sealing cover 3; the suction pump 8 is connected with the liquid collecting pipe 43; the linkage assembly 9 is arranged in the shell 1 and changes the stop state of the flushing nozzle 5 and the opening and closing state of the shell 1 through the movement of the lifting seat 2.

[0060] The circulating pump 7 sends the liquid milk into the sealing cover 3, the water and small molecular substances such as whey protein in the liquid milk are sent out from the liquid collecting pipe 43 through the ceramic filter plate 4, the large molecular substances and water that cannot pass through the ceramic filter plate 4 flow back into the liquid storage tank 6, after continuous filtration, the content of whey protein in the liquid storage tank 6 becomes lower and the total amount of liquid also decreases. When the retained substances on the ceramic filter plate 4 are more, the suction pump 8 is reversely connected first to perform back flushing on the ceramic filter plate 4, then the lifting seat 2 is lowered, the flushing nozzle 5 is used to flush the ceramic filter plate 4, and after flushing, the lifting seat 2 is raised. The flushing nozzle 5 can flush the retained substances that are difficult to clean up by back flushing, at the same time, the tubular ceramic membrane is changed into the plate-shaped ceramic filter plate 4, which makes the ceramic filter plate 4 more easily cleaned and improves the cleaning effect of the separation and purification device on the ceramic membrane.

[0061] The shell 1 is a cuboid, a platform plate is welded on one side of the outer wall, and a plurality of supporting legs are welded at the bottom end. The inner bottom wall of the shell 1 is arranged obliquely, and the lowest end is provided with a cleaning door 13. The cleaning water falling on the bottom of the shell 1 and the retained substances falling down flow towards the cleaning door 13, which facilitates the cleaning of the shell 1 by the staff. The liquid storage tank 6 is a cuboid box body and is placed on the platform plate, is provided with a liquid feeding pipe at the top end and a liquid discharging pipe at the bottom end and is used for containing liquid milk. The top end of the liquid storage tank 6 is also provided with an air pipe 61, because the liquid in the liquid storage tank 6 decreases with the filtration operation, the air pipe 61 is used for balancing the air pressure in the liquid storage tank 6. The air pipe 61 is provided with a filter core 62 inside and is used for filtering the air entering the liquid storage tank 6. The circulating pump 7 is bolted at the top end of the liquid storage tank 6.

[0062] Referring to Figure 2 and Figure 4The sealing cover 3 is a cuboid cover with an open bottom end, and is welded to the top wall of the casing 1. The sealing cover 3 is provided with multiple groups arranged in sequence. One horizontal side wall of the sealing cover 3 is provided with liquid inlet pipes 31 at the top end, and the bottom end of the opposite side wall is provided with liquid outlet pipes 32. All the liquid inlet pipes 31 are connected to a liquid inlet main pipe 33, and the liquid inlet main pipe 33 penetrates the casing 1 and is connected to the outlet of the circulating pump 7. All the liquid outlet pipes 32 are connected to a liquid outlet main pipe 34, and the liquid outlet main pipe 34 penetrates the casing 1 upwards and is bent to penetrate into the liquid storage tank 6. The liquid outlet main pipe 34 is provided with an adjusting valve 35 at the top end of the casing 1. By changing the opening degree of the adjusting valve 35, the liquid pressure in the sealing cover 3 can be adjusted, and the filtration efficiency can be changed.

[0063] With reference to Figure 2 , Figure 5 and Figure 6 , the lifting seat 2 comprises a seat plate 21, a lifting rod 22 and a telescopic cylinder 23. The seat plate 21 is a rectangular plate, and is provided with a clamping groove at the top end for clamping the ceramic filter plate 4. A sealing ring is embedded around the clamping groove, which is used to improve the sealing between the sealing cover 3 and the clamping plate. The lifting rod 22 is fixedly connected to the bottom end of the seat plate 21 and is perpendicular to the seat plate 21. The bottom end of the lifting rod 22 penetrates the bottom end of the casing 1 and is provided with a sealing pad between the casing 1, so that the liquid in the casing 1 is not easy to leak. The bottom end of the lifting rod 22 is threadedly connected to an ear plate, and the telescopic cylinder 23 is hinged between the ear plate and the casing 1. By the extension and contraction of the telescopic cylinder 23, the lifting rod 22 and the seat plate 21 can be lifted. The telescopic cylinder 23 can be any one of an electric cylinder, a pneumatic cylinder or a hydraulic cylinder. In the embodiment of the application, the telescopic cylinder 23 is a pneumatic cylinder.

[0064] The ceramic filter plate 4 is a rectangular plate and is vertically inserted into the seat plate 21. The ceramic filter plate 4 is provided with vertical liquid collecting holes 41, which are uniformly and spacedly arranged. A gasket is embedded in the clamping groove of the seat plate 21, and the ceramic filter plate 4 presses the gasket tightly to the groove bottom of the clamping groove, so that the bottom end of the liquid collecting hole 41 is closed. The water and small molecular substances such as whey protein in the sealing cover 3 can penetrate the ceramic filter plate 4 into the liquid collecting hole 41 and flow upwards. The top end of the ceramic filter plate 4 is clamped with a liquid collecting head 42, and the liquid collecting head 42 is provided with an inner cavity, and the liquid collecting hole 41 communicates with the inner cavity. The top end of the liquid collecting head 42 is fixedly connected with a liquid collecting pipe 43, and the liquid collecting pipe 43 comprises a hard pipe part and a soft pipe part. The hard pipe part is connected with the liquid collecting head 42 and penetrates the casing 1 upwards, and the soft pipe part is connected to the top end of the hard pipe part. The soft pipe parts of multiple liquid collecting pipes 43 are connected to a liquid collecting main pipe, and the liquid collecting main pipe is connected to a suction pump 8. The suction pump 8 is arranged at the top end of the casing 1 and is used to generate negative pressure in the liquid collecting pipe 43, so as to improve the filtration efficiency of the ceramic filter plate 4.

[0065] The two opposite side walls of the sealing cover 3 are also integrally provided with baffles 36, which abut against the ceramic filter plate 4, and divide the space between the inner wall of the sealing cover 3 and the ceramic filter plate 4 into a serpentine channel. The liquid milk enters the sealing cover 3 from the liquid inlet pipe 31, and flows through the serpentine channel to increase the contact time of the liquid milk with the ceramic filter plate 4, thereby improving the filtering efficiency.

[0066] With reference to Figures 1-3 Two opposite side walls in the casing 1 are welded with containing pipes 11, which are rectangular pipes. The two rectangular pipes are opposite and communicate the space inside and outside the casing 1. The rectangular pipes can reduce the liquid splashing out of the casing 1 during the flushing operation. The flushing spray pipe 5 is arranged in the containing pipe 11 and includes a pipe body and a spray head. The spray head is provided with a plurality of spray nozzles on the pipe body in a horizontal direction and is perpendicular to the ceramic filter plate 4. The height of the spray head is lower than the height of the lower end of the sealing cover 3. An electromagnetic valve 51 is arranged on the pipe body.

[0067] A slide rod is vertically welded between the top end of the containing pipe 11 and the inner top wall of the casing 1. An opening and closing door 12 is slidably connected to the slide rod. The opening and closing door 12 is an L-shaped plate and can close the containing pipe 11 toward the pipe opening in the casing 1 when it is moved to the containing pipe 11.

[0068] The linkage assembly 9 includes opening and closing racks 91, transmission gears 92, guide rods 93, a linkage frame 94, transmission racks 95, and tension springs 96. The opening and closing racks 91 are provided with four, and one is welded on each side of each opening and closing door 12. The transmission gears 92 are also provided with four, which are rotatably connected to the two opposite outer side walls of the containing pipe 11 and are engaged with the corresponding opening and closing racks 91. The guide rods 93 are provided with four, which are welded between the inner top wall and the bottom wall of the casing 1 and are located at the four corners. The linkage frame 94 is a rectangular frame, which is slidably connected to the guide rods 93 and is sleeved on all the lifting rods 22, and can slide along the guide rods 93. The tension springs 96 are provided with four, which are sleeved on the guide rods 93, respectively, and are hookingly connected to the inner top wall of the casing 1 at the top end and to the linkage frame 94 at the bottom end. The transmission racks 95 are provided with four, which are vertically fixedly connected to the linkage frame 94 and are engaged with the corresponding transmission gears 92, respectively.

[0069] A trigger strip 941 is welded on the linkage frame 94, which abuts against one of the transmission racks 95. A micro switch 52 is mounted on the inner wall of the casing 1 and corresponds to the position of the trigger strip 941 and is electrically connected to the electromagnetic valve 51 through wires. A power supply is arranged on the outer side wall of the casing 1 and is electrically connected to the micro switch 52 and the electromagnetic valve 51 through wires, respectively. When the seat plate 21 is lowered, the linkage frame 94 is pressed down, the trigger strip 941 is moved down to press the trigger micro switch 52, the micro switch 52 makes the electromagnetic valve 51 energized to open, and the flushing spray pipe 5 can spray and flush the descending ceramic filter plate 4.

[0070] The filtering principle of the embodiment of the application is that the circulating pump 7 pressurizes the liquid milk to be sent into the sealing cover 3, after the liquid milk contacts the ceramic filter plate 4, part of the water and small molecular substances such as whey protein will enter the liquid collecting hole 41 through the ceramic filter plate 4, and then be pumped out by the suction pump 8 through the liquid collecting pipe 43; the remaining water, small molecular substances such as whey protein, casein and fat will continue to flow in the sealing cover 3, and be discharged from the liquid outlet pipe 32 to return to the liquid storage tank 6, and the circulating operation can continuously obtain whey protein liquid.

[0071] The flushing principle of the embodiment of the application is that the suction pump 8 is first reversed to flush the ceramic filter plate 4, to reduce the residues on the surface of the ceramic filter plate 4, then the telescopic cylinder 23 is extended to lower the corresponding seat plate 21, the linkage frame 94 is pressed down in the process of lowering the seat plate 21, the trigger strip 941 presses down the micro switch 52, the electromagnetic valve 51 is opened, the flushing nozzle 5 is aligned with the bottom of the ceramic filter plate 4 to flush, and as the ceramic filter plate 4 continues to descend, the flushing pipe can complete the first cleaning of the ceramic filter plate 4 from bottom to top; after the first flushing of the ceramic filter plate 4 is completed, the telescopic cylinder 23 is retracted, and the trigger strip 941 rises until it is separated from the micro switch 52, which is the second cleaning of the ceramic filter plate 4 from top to bottom by the flushing pipe, and the flushing operation of the single ceramic filter plate 4 is completed. Compared with the flushing mode relying only on backwashing, the application improves the flushing effect.

[0072] The embodiments of the specific embodiment are the preferred embodiments of the application, and are not limited to the protection scope of the application, wherein the same parts are indicated by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A whey protein separation and purification apparatus, characterized in that, include: Housing (1); Lifting seat (2), slidably connected inside housing (1); A sealing cover (3) is installed on the inner top wall of the housing (1), with an opening at one end facing the lifting seat (2), and an inlet pipe (31) and an outlet pipe (32) on two opposite side walls; a ceramic filter plate (4) is snapped onto the top of the lifting seat (2), with multiple vertically penetrating collection holes (41), and a collection head (42) connecting all the collection holes (41) is snapped onto the top of the collection head (42), and a collection pipe (43) that slides out of the top of the housing (1) is fixedly connected to the top of the collection head (42); a flushing spray pipe (5) is installed on two opposite side walls inside the housing (1), positioned lower than the bottom of the sealing cover (3), vertically facing the ceramic filter plate (4), and connected to a pressurized water source; a storage tank (6) is installed on The housing (1) is connected to an outlet pipe (32) for holding liquid milk; a circulation pump (7) has its inlet connected to the bottom of the storage tank (6) via a pipe, and its outlet connected to an inlet pipe (31); a suction pump (8) is installed on the housing (1), and its inlet is connected to a collection pipe (43); the two inner side walls of the housing (1) are provided with receiving pipes (11) that connect to the external space of the housing (1), and the flushing spray pipe (5) is installed inside the receiving pipe (11); the receiving pipe (11) facing the inside of the housing (1) is provided with an opening and closing door (12); a linkage component (9) is also included, the opening and closing door (12) is slidably connected to the receiving pipe (11), and the linkage component (9) includes: an opening and closing rack (91). The following components are connected: a door (12); a transmission gear (92), rotatably connected to the receiving tube (11), meshing with the opening and closing rack (91); a guide rod (93), fixedly connected inside the housing (1); a linkage frame (94), slidably connected to the guide rod (93), vertically facing the lifting seat (2); a transmission rack (95), fixedly connected to the linkage frame (94), meshing with the transmission gear (92); a tension spring (96), sleeved on the guide rod (93), with its two ends connected to the inner top wall of the housing (1) and the linkage frame (94) respectively; a solenoid valve (51) is provided on the flushing nozzle (5), and a micro switch (52) electrically connected to the solenoid valve (51) is provided on the inner wall of the housing (1). The linkage frame (94) is welded with a trigger bar (941), which abuts against the transmission rack (95); the lifting seat (2) includes: a seat plate (21), with a slot (211) at the top for the ceramic filter plate (4) to be engaged; a lifting rod (22), which is fixedly connected to the bottom surface of the seat plate (21), with the bottom end extending downward through the housing (1); and a telescopic cylinder (23), which is hinged between the lifting rod (22) and the bottom end of the housing (1); when the seat plate (21) descends, it will press down the linkage frame (94), and when the linkage frame (94) descends, the trigger bar (941) will press down to trigger the micro switch (52), and the micro switch (52) will energize and open the solenoid valve (51).

2. The whey protein separation and purification apparatus according to claim 1, characterized in that, The combination of the housing (1), lifting seat (2), sealing cover (3) and ceramic filter plate (4) is provided in multiple groups. Multiple liquid inlet pipes (31) are gathered into a liquid inlet main pipe (33), and multiple liquid outlet pipes (32) are gathered into a liquid outlet main pipe (34). A regulating valve (35) is provided on the liquid outlet main pipe (34).

3. The whey protein separation and purification apparatus according to claim 1, characterized in that, The inner wall of the sealing cover (3) is connected to a partition (36), which is arranged on both sides of the ceramic filter plate (4) to form a serpentine channel on both sides of the ceramic filter plate (4).

4. The whey protein separation and purification apparatus according to claim 3, characterized in that, The inlet pipe (31) is located at the top of the side wall of the sealing cover (3), and the outlet pipe is located at the bottom of the side wall of the sealing cover (3).

5. The whey protein separation and purification apparatus according to claim 1, characterized in that, The inner bottom wall of the housing (1) is inclined, and a cleaning door (13) is provided on the lowest side.

6. The whey protein separation and purification apparatus according to claim 1, characterized in that, The liquid storage tank (6) is provided with a vent pipe (61), and a filter element (62) is provided inside the vent pipe (61).

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