A ceramic membrane microfiltration device for separating milk whey protein

Abstract

The present invention relates to the technical field of milk production, and specifically discloses a ceramic membrane microfiltration device for separating milk whey protein, comprising a square frame, a ceramic membrane assembly, a feed pipe, a casein concentrate outlet pipe, a whey protein liquid outlet pipe, and a flushing pipe, wherein a plurality of the ceramic membrane assemblies are distributed in an array, the ceramic membrane assembly is installed in the square frame through a support assembly, a feed pipe group is provided between the ceramic membrane assembly and the feed pipe, a first discharge pipe group is provided between the ceramic membrane assembly and the casein concentrate outlet pipe, a second discharge pipe group is provided between the ceramic membrane assembly and the whey protein liquid outlet pipe, and a pressure measuring assembly is provided between the feed pipe group and the discharge pipe group. The present invention realizes real-time monitoring of the permeability of the ceramic membrane assembly, has a visual structure, facilitates timely replacement of the ceramic membrane, and has a structure for pushing out the liquid in the force measuring assembly, thereby avoiding residual liquid in the force measuring assembly.

Description

Technical Field

[0001] The invention relates to the technical field of milk production, in particular to a ceramic membrane microfiltration device for separating milk whey protein. Background Art

[0002] Currently, milk whey protein products, both domestically and internationally, are typically derived from whey, a byproduct of cheese or other casein production, through clarification, separation, and purification, a complex process. Cheese production relies on rennet coagulation and precipitation, which causes turbidity in the whey and introduces other exogenous milk substances, affecting the purity and quality of the whey protein. Casein and whey protein in milk have different molecular sizes. Using ceramic membranes with appropriate pore sizes to separate whey protein from casein in milk yields high-quality whey protein without sacrificing casein. This effectively reduces processing volume and energy consumption during casein production, thereby improving factory efficiency.

[0003] During the use of some existing ceramic membrane microfiltration equipment, after separation is completed, a centrifugal pump is generally used to provide a pressure difference of the test liquid on both sides of the membrane, and a flow meter is used to measure the membrane's permeability. This is not intuitive enough, and the ceramic membrane needs to be cleaned after the test. Not only does the test process take a lot of time, but the ceramic membrane is often not replaced in a timely manner. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a ceramic membrane microfiltration device for separating milk whey protein, which can overcome the technical defects.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A ceramic membrane microfiltration device for separating milk whey protein comprises a square frame, a ceramic membrane assembly, a feed pipe, a casein concentrate outlet pipe, a whey protein liquid outlet pipe, and a flushing pipe. A plurality of the ceramic membrane assemblies are arranged in an array and mounted in the square frame via a support assembly. A feed pipe group is provided between the ceramic membrane assembly and the feed pipe, a first discharge pipe group is provided between the ceramic membrane assembly and the casein concentrate outlet pipe, a second discharge pipe group is provided between the ceramic membrane assembly and the whey protein liquid outlet pipe, a backwash pipe group is provided between the plurality of the second discharge pipe groups, and a pressure measuring assembly is provided between the feed pipe group and the discharge pipe group.

[0007] The support assembly includes a plurality of horizontal braces distributed in an array, wherein the horizontal braces are fixedly installed between the two long sides of the rectangular bottom surface of the square frame, wherein two vertical braces are fixedly installed on the top of two of the horizontal braces, and a bearing plate is fixedly installed between the two vertical braces arranged parallel to the long sides of the square frame, and a plurality of U-shaped frames are arranged on the side away from the two bearing plates, and the number of the U-shaped frames is the same as that of the ceramic membrane assembly;

[0008] The feed pipe group includes a first branch pipe and a second branch pipe, the first branch pipe and the second branch pipe are connected to the ceramic membrane assembly and the feed pipe respectively, the first discharge pipe group includes a bend pipe and a liquid outlet pipe, the ceramic membrane assembly is connected to the casein concentrate outlet pipe through the bend pipe and the liquid outlet pipe, and the second discharge pipe group includes a first clear liquid outlet pipe and a second clear liquid outlet pipe, the first clear liquid outlet pipe and the second clear liquid outlet pipe are connected to the ceramic membrane assembly and the whey protein liquid outlet pipe respectively;

[0009] The pressure measuring assembly includes a first pressure measuring tube and a second pressure measuring tube that are transparent. The first pressure measuring tube is installed between the first clear liquid outlet pipe and the second clear liquid outlet pipe through a three-way joint, and the second pressure measuring tube is installed between the first branch pipe and the second branch pipe through a three-way joint. The first pressure measuring tube and the second pressure measuring tube are coaxially arranged, and the first pressure measuring tube and the second pressure measuring tube are both penetrated and fixedly connected to the U-shaped frame. Pistons are slidably installed in the first pressure measuring tube and the second pressure measuring tube, and a support seat is fixedly installed on the side away from the two pistons. The support seat is sleeved with an iron ring. The adjacent ends of the first pressure measuring tube and the second pressure measuring tube are each provided with a force measuring assembly, and the U-shaped frame is provided with a drive assembly for adjusting the position of the piston.

[0010] Preferably, a feed port is provided at the bottom of the ceramic membrane assembly, the first branch pipe is fixedly connected to the feed port via a flange, the feed pipe is provided in multiple sections, and the multiple sections of the feed pipe are fixedly connected via a four-way joint.

[0011] Preferably, a first discharge port is provided at the top of the ceramic membrane assembly, the bent pipe is fixedly connected to the first discharge port through a flange, the bent pipe is fixedly connected to the liquid outlet pipe, the liquid outlet pipe is fixedly connected to the casein concentrate outlet pipe through a four-way joint, the casein concentrate outlet pipe is arranged in multiple sections, and the multiple sections of the casein concentrate outlet pipe are fixedly connected through a four-way joint.

[0012] Preferably, a second discharge port is provided on the top of the ceramic membrane assembly, the first clear liquid discharge pipe is fixedly connected to the second discharge port through a flange, the whey protein liquid discharge pipe is arranged in multiple sections, and the multiple sections of the whey protein liquid discharge pipe are fixedly connected through a four-way joint.

[0013] Preferably, the backwash pipe group includes a third through pipe, the second discharge port, the first clear liquid outlet pipe and the third through pipe are connected through a three-way joint, the flushing pipe is connected to the ceramic membrane assembly through the third through pipe, the side wall of the third through pipe is provided with a second solenoid valve, and the side wall of the first clear liquid outlet pipe is provided with a first solenoid valve.

[0014] Preferably, the force measuring assembly includes a pressure sensor, the top wall and bottom wall of the U-shaped frame are both provided with a support frame, the inward folded bottom wall of the support frame is provided with a support column, the pressure sensor is installed at one end of the support column away from the support frame, and the two pressure sensors are respectively located in the first pressure measuring tube and the second pressure measuring tube.

[0015] Preferably, the driving assembly includes a screw, which passes through and is rotatably installed on the two horizontal sections of the U-shaped frame. The screw is threadedly connected to two lifting plates, and the lifting plates are fixedly sleeved with a shell through a through hole. The two shells are respectively slidably sleeved with the first pressure measuring tube and the second pressure measuring tube. An electromagnet ring is provided in the shell, and the two electromagnet rings are respectively sleeved with the first pressure measuring tube and the second pressure measuring tube. A worm gear is keyed to the middle part of the screw, and a servo motor is provided on the side wall of the vertical section of the U-shaped frame. The output shaft of the servo motor is connected to a worm through a coupling, and the worm gear is meshed with the worm gear.

[0016] Preferably, the screw rod is provided with two sections of threads with the same pitch and opposite rotation directions, and the two lifting plates are matched with adjacent threads respectively.

[0017] Preferably, a first flow meter is provided at a position near the open end of the feed pipe, and a second flow meter is provided at a position near the open end of the casein concentrate outlet pipe.

[0018] The beneficial effects of the present invention are:

[0019] 1. By arranging the pressure measuring assembly, the beneficial effect that can be obtained is that the ceramic membrane assembly is distributed in an array, the ceramic membrane assembly is installed in the square frame through the support assembly, a feed pipe group is provided between the ceramic membrane assembly and the feed pipe, a first discharge pipe group is provided between the ceramic membrane assembly and the casein concentrate outlet pipe, a second discharge pipe group is provided between the ceramic membrane assembly and the whey protein liquid outlet pipe, the first pressure measuring tube is installed between the first clear liquid outlet pipe and the second clear liquid outlet pipe through a three-way joint, the second pressure measuring tube is installed between the first branch pipe and the second branch pipe through a three-way joint, the first pressure measuring tube and the second pressure measuring tube are coaxially arranged, the first pressure measuring tube and the second pressure measuring tube are both penetrated and fixedly connected to the U-shaped frame, pistons are slidably installed in the first pressure measuring tube and the second pressure measuring tube, a support seat is fixedly installed on the side away from the two pistons, an iron ring is sleeved on the support seat, a force measuring assembly is provided at one adjacent end of the first pressure measuring tube and the second pressure measuring tube, and a drive assembly for adjusting the position of the piston is provided on the U-shaped frame;

[0020] The skim milk is conveyed at constant pressure by the feed pump, enters multiple second branch pipes and the first branch pipe from the feed pipe, and then enters the ceramic membrane assembly through the feed port. The ceramic membrane surface of the ceramic membrane assembly forms a flow rate of 5-7m / s. The whey protein liquid passes through the 0.1um ceramic membrane filtration surface under pressure and large flow conditions and enters the shell-side clear liquid flow channel. The whey protein liquid flows into the whey protein liquid outlet pipe through the first clear liquid outlet pipe and the second clear liquid outlet pipe. The milk in which the whey protein liquid is discharged has a gradually increased casein content to form a casein concentrate, which flows into the casein concentrate outlet pipe through the first discharge port, the elbow and the discharge pipe. The skim milk at the feed port of the ceramic membrane assembly presses the piston in the second pressure measuring tube upward, and the second discharge port of the ceramic membrane assembly The whey protein liquid at the mouth presses the piston of the second pressure measuring tube downward, and the two pistons slide toward each other. The two support seats interact with adjacent pressure sensors respectively. The two pressure sensors are connected to the input end of the PLC control. The through-hole PLC controller calculates and displays the pressure difference between the inlet and outlet of the ceramic membrane assembly. The first flow meter monitors the flow of skimmed milk, and the second flow meter monitors the flow of casein concentrate in the outlet pipe. By monitoring the inlet and outlet flow and the inlet and outlet pressure difference of the ceramic membrane assembly, the permeability performance of the ceramic membrane assembly can be monitored in real time, which is convenient for timely replacement of the ceramic membrane and maintenance of the pressure measuring assembly. It has a visual structure, which is convenient for observing the position of the pistons in the first and second pressure measuring tubes.

[0021] 2. By setting up a drive assembly, the beneficial effect that can be obtained is that the screw passes through and is rotatably installed on the two horizontal sections of the U-shaped frame, the screw is threadedly connected to the two lifting plates, the lifting plates are fixedly sleeved with a casing through a through hole, the two casings are respectively slidably sleeved with the first pressure measuring tube and the second pressure measuring tube, an electromagnet ring is provided in the casing, the two electromagnet rings are respectively sleeved with the first pressure measuring tube and the second pressure measuring tube, a worm gear is keyed to the middle part of the screw, a servo motor is provided on the side wall of the vertical section of the U-shaped frame, the output shaft of the servo motor is connected to the worm through a coupling, and the worm and the worm gear are meshed;

[0022] Before stopping the delivery of skim milk, the electromagnet ring is energized and magnetically attracted to the adjacent iron ring. The servo motor drives the worm and worm gear to engage and transmit. The screw and worm gear rotate synchronously, and the two lifting plates move away from each other, driving the two pistons to slide synchronously, pushing out the liquid in the first pressure measuring tube and the second pressure measuring tube respectively. After stopping the delivery of skim milk, the drive assembly drives the two pistons to reset, which has a structure for pushing out the liquid in the force measuring assembly, avoiding residual liquid in the force measuring assembly.

[0023] 3. By setting up a backwash pipe group, the beneficial effect that can be obtained is that the backwash pipe group includes a third through pipe, the second discharge port, the first clear liquid outlet pipe and the third through pipe are connected by a three-way joint, the flushing pipe is connected to the ceramic membrane assembly through the third through pipe, the side wall of the third through pipe is provided with a second solenoid valve, and the side wall of the first clear liquid outlet pipe is provided with a first solenoid valve;

[0024] The high-pressure cleaning liquid enters multiple third through pipes through the flushing pipe, and then enters the ceramic membrane assembly through the second outlet. After flushing the ceramic membrane assembly, it flows out from the feed port, the first branch pipe, the second branch pipe and the feed pipe, thus forming an automatic reverse flushing structure for the ceramic filter membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a diagram of the installation structure of the square frame in the present invention;

[0028] Figure 3 This is a diagram showing the installation structure of the casein concentrate outlet pipe of the present invention;

[0029] Figure 4 This is a diagram of the installation structure of the ceramic membrane assembly of the present invention;

[0030] Figure 5 This is an installation structure diagram of the first discharge pipe group in the present invention;

[0031] Figure 6 This is a diagram of the installation structure of the drive assembly in the present invention;

[0032] Figure 7 This is a diagram of the installation structure of the piston and the force measuring assembly in the present invention;

[0033] Figure 8 An exploded view of the piston, support seat and iron ring in the present invention;

[0034] Figure 9 This is a diagram of the installation structure of the force measuring assembly in the present invention;

[0035] Figure 10 Exploded view of the lifting plate, housing and electromagnet ring in the present invention;.

[0036] Description of reference numerals:

[0037] In the figure: 1, square frame; 11, horizontal support rod; 12, vertical support rod; 13, load plate; 14, U-shaped frame; 2, ceramic membrane assembly; 21, feed port; 22, first discharge port; 23, second discharge port; 3, feed pipe; 31, first branch pipe; 32, second branch pipe; 4, casein concentrate outlet pipe; 41, elbow pipe; 42, outlet pipe; 5, whey protein liquid outlet pipe; 51, first clear liquid outlet pipe; 52, second clear liquid outlet pipe; 53, first electric Magnetic valve; 6. Flushing pipe; 61. Third through pipe; 62. Second solenoid valve; 71. First pressure measuring tube; 72. Second pressure measuring tube; 73. Piston; 74. Support seat; 75. Iron ring; 76. Support frame; 77. Support column; 78. Pressure sensor; 81. Screw; 82. Lifting plate; 83. Housing; 84. Electromagnetic ring; 85. Worm gear; 86. Servo motor; 87. Worm; 91. First flow meter; 92. Second flow meter. DETAILED DESCRIPTION

[0038] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose of the invention, the following, in conjunction with the accompanying drawings and preferred embodiments, clearly and completely describes the specific implementation methods, structures, features, and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] In the description of this application, it should be understood that the orientation or position relationship indicated by "inside" or "outside" is based on the orientation or position described in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, a specific orientation structure and operation, and therefore cannot be understood as a limitation on this application.

[0040] Reference Figures 1-10, a ceramic membrane microfiltration device for separating milk whey protein disclosed in the present invention, comprising a square frame 1, a ceramic membrane assembly 2, a feed pipe 3, a casein concentrate outlet pipe 4, a whey protein liquid outlet pipe 5 and a flushing pipe 6, multiple ceramic membrane assemblies 2 are distributed in an array, and the ceramic membrane assembly 2 is installed in the square frame 1 through a support assembly, which includes multiple horizontal support rods 11 distributed in an array, and the horizontal support rods 11 are fixedly installed between the two long sides of the rectangular bottom surface of the square frame 1, wherein two vertical support rods 12 are fixedly installed at the top ends of the two horizontal support rods 11, and a supporting plate 13 is fixedly installed between the two vertical support rods 12 arranged parallel to the long sides of the square frame 1, and multiple U-shaped frames 14 are provided on the side away from the two supporting plates 13, and the number of U-shaped frames 14 is the same as that of the ceramic membrane assembly 2. The ceramic membrane assembly 2 adopts a gradient GP membrane, and the water permeability gradient of the GP membrane increases from the inlet to the outlet. This is because the density of the supporting layer material at different positions of the membrane is different, and the production water flux is different. This structure is used to compensate and balance the pressure difference between the inside and outside of the membrane, thereby ensuring that the product flux in actual operation remains basically constant from the membrane inlet to the membrane outlet.

[0041] A feed pipe group is arranged between the ceramic membrane assembly 2 and the feed pipe 3, and the feed pipe group includes a first branch pipe 31 and a second branch pipe 32. The first branch pipe 31 and the second branch pipe 32 are connected to the ceramic membrane assembly 2 and the feed pipe 3 respectively. A feed port 21 is provided at the bottom of the ceramic membrane assembly 2. The first branch pipe 31 is fixedly connected to the feed port 21 by a flange. The feed pipe 3 is arranged in multiple sections, and the multiple sections of the feed pipe 3 are fixedly connected by a four-way joint. The skim milk is transported at constant pressure by a feed pump, enters multiple second branch pipes 32 and the first branch pipe 31 from the feed pipe 3, and then enters the ceramic membrane assembly 2 through the feed port 21.

[0042] A first discharge pipe group is provided between the ceramic membrane assembly 2 and the casein concentrate outlet pipe 4. The first discharge pipe group includes a bend 41 and a liquid discharge pipe 42. The ceramic membrane assembly 2 is connected to the casein concentrate outlet pipe 4 through the bend 41 and the liquid discharge pipe 42. A first discharge port 22 is provided on the top of the ceramic membrane assembly 2. The bend 41 is fixedly connected to the first discharge port 22 through a flange. The bend 41 is fixedly connected to the liquid discharge pipe 42. The liquid discharge pipe 42 is fixedly connected to the casein concentrate outlet pipe 4 through a four-way joint. The protein concentrate outlet pipe 4 is arranged in multiple sections, and the multiple sections of the casein concentrate outlet pipe 4 are fixedly connected by a four-way joint. The ceramic membrane surface of the ceramic membrane assembly 2 forms a flow rate of 5-7m / s. The whey protein liquid passes through the 0.1um ceramic membrane filtration surface under pressure and large flow conditions and enters the shell-side clear liquid flow channel. The milk in the whey protein liquid is discharged, and the casein content gradually increases to form a casein concentrate, which flows into the casein concentrate outlet pipe 4 through the first discharge port 22, the elbow 41 and the liquid outlet pipe 42.

[0043] A second discharge pipe group is arranged between the ceramic membrane assembly 2 and the whey protein liquid outlet pipe 5, and the second discharge pipe group includes a first clear liquid outlet pipe 51 and a second clear liquid outlet pipe 52. The first clear liquid outlet pipe 51 and the second clear liquid outlet pipe 52 are respectively connected to the ceramic membrane assembly 2 and the whey protein liquid outlet pipe 5. A second discharge port 23 is arranged on the top of the ceramic membrane assembly 2. The first clear liquid outlet pipe 51 is fixedly connected to the second discharge port 23 through a flange. The whey protein liquid outlet pipe 5 is arranged in multiple sections, and the multiple sections of the whey protein liquid outlet pipes 5 are fixedly connected by a four-way joint. Under pressure and high flow conditions, the whey protein liquid passes through the 0.1um ceramic membrane filtration surface and enters the shell-side clear liquid flow channel. The whey protein liquid flows into the whey protein liquid outlet pipe 5 through the first clear liquid outlet pipe 51 and the second clear liquid outlet pipe 52.

[0044] A backwash pipe group is arranged between multiple second discharge pipe groups, and the backwash pipe group includes a third through pipe 61. The second discharge port 23, the first clear liquid outlet pipe 51 and the third through pipe 61 are connected by a three-way joint. The flushing pipe 6 is connected to the ceramic membrane assembly 2 through the third through pipe 61. A second solenoid valve 62 is provided on the side wall of the third through pipe 61, and a first solenoid valve 53 is provided on the side wall of the first clear liquid outlet pipe 51. After separation is completed, the first solenoid valve 53 is closed and the second solenoid valve 62 is opened. The high-pressure cleaning liquid enters the multiple third through pipes 61 through the flushing pipe 6, and then enters the ceramic membrane assembly 2 through the second discharge port 23. After flushing the ceramic membrane assembly 2, it flows out from the feed port 21, the first branch pipe 31, the second branch pipe 32 and the feed pipe 3 to complete the flushing. In conjunction with the pressure measuring component, the flushing pressure is displayed to facilitate the adjustment of the flushing pressure.

[0045] A pressure measuring assembly is provided between the feed pipe group and the discharge pipe group. The pressure measuring assembly includes a transparent first pressure measuring tube 71 and a second pressure measuring tube 72. The first pressure measuring tube 71 is installed between the first clear liquid outlet pipe 51 and the second clear liquid outlet pipe 52 through a three-way joint. The second pressure measuring tube 72 is installed between the first branch pipe 31 and the second branch pipe 32 through a three-way joint. The first pressure measuring tube 71 and the second pressure measuring tube 72 are coaxially arranged. The first pressure measuring tube 71 and the second pressure measuring tube 72 are both penetrated and fixedly connected to the U-shaped frame 14. A piston 73 is slidably installed in the first pressure measuring tube 71 and the second pressure measuring tube 72. A support seat 74 is fixedly installed on the side away from the two pistons 73. The support seat 74 is sleeved with an iron ring 75. A force measuring assembly is provided at the adjacent end of the first pressure measuring tube 71 and the second pressure measuring tube 72. The force measuring assembly includes a pressure sensor 78. The top wall and the bottom wall of the U-shaped frame 14 are both provided with a support frame 76. The inner folded bottom wall of the support frame 76 is provided with a support column 77. The pressure sensor 78 is installed on the support column 77 away from the support frame 7 At one end of 6, a first flow meter 91 is provided near the open end of the feed pipe 3, and a second flow meter 92 is provided near the open end of the casein concentrate outlet pipe 4. Two pressure sensors 78 are respectively located in the first pressure measuring tube 71 and the second pressure measuring tube 72. The skim milk at the feed port 21 of the ceramic membrane assembly 2 presses the piston 73 in the second pressure measuring tube 72 upward, and the whey protein liquid at the second outlet port 23 of the ceramic membrane assembly 2 presses the piston 73 in the second pressure measuring tube 72 downward. The two pistons 73 slide toward each other, and the two support seats 74 interact with adjacent pressure sensors 78 respectively. The two pressure sensors 78 are both connected to the input end of the PLC control. The through-hole PLC controller calculates and displays the pressure difference between the inlet and outlet of the ceramic membrane assembly 2. The first flow meter 91 monitors the flow of skim milk, and the second flow meter 92 monitors the flow in the casein concentrate outlet pipe 4. By monitoring the inlet and outlet flow and the inlet and outlet pressure difference of the ceramic membrane assembly 2, the permeability of the ceramic membrane assembly 2 is monitored in real time, which is convenient for timely replacement.

[0046] The U-shaped frame 14 is provided with a driving assembly for adjusting the position of the piston 73. The driving assembly includes a screw 81, which passes through and is rotatably installed on the two horizontal sections of the U-shaped frame 14. The screw 81 is threadedly connected to two lifting plates 82. The screw 81 is provided with two sections of threads with the same pitch and opposite rotation directions. The two lifting plates 82 are matched with adjacent threads respectively. The lifting plate 82 is fixedly sleeved with a casing 83 through a through hole. The two casings 83 are respectively slidably sleeved with the first pressure measuring tube 71 and the second pressure measuring tube 72. An electromagnet ring 84 is provided in the casing 83. The two electromagnet rings 84 are respectively sleeved with the first pressure measuring tube 71 and the second pressure measuring tube 72. A worm gear 85 is keyed to the middle of the rod 81, and a servo motor 86 is provided on the side wall of the vertical section of the U-shaped frame 14. The output shaft of the servo motor 86 is connected to a worm 87 through a coupling. The worm 87 is meshed with the worm gear 85. Before stopping the delivery of skim milk, the electromagnet ring 84 is energized and magnetically attracted to the adjacent iron ring 75. The servo motor 86 drives the worm 87 and the worm gear 85 to engage and transmit. The screw 81 and the worm gear 85 rotate synchronously, and the two lifting plates 82 move away from each other, driving the two pistons 73 to slide synchronously, respectively pushing out the liquid in the first pressure measuring tube 71 and the second pressure measuring tube 72. After stopping the delivery of skim milk, the drive assembly drives the two pistons 73 to reset.

[0047] The working principle and use process of the present invention are as follows: skim milk is conveyed at constant pressure by a feed pump, enters multiple second branch pipes 32 and the first branch pipe 31 from the feed pipe 3, and then enters the ceramic membrane assembly 2 through the feed port 21. The ceramic membrane surface of the ceramic membrane assembly 2 forms a flow rate of 5-7m / s. The whey protein liquid passes through the 0.1um ceramic membrane filtration surface under pressure and large flow conditions and enters the shell-side clear liquid flow channel. The whey protein liquid flows into the whey protein liquid outlet pipe 5 through the first clear liquid outlet pipe 51 and the second clear liquid outlet pipe 52. The milk discharged from the whey protein liquid has a gradually increased casein content to form a casein concentrate, which flows into the casein concentrate outlet pipe 4 through the first discharge port 22, the elbow 41 and the discharge pipe 42. The skim milk at the feed port 21 of the ceramic membrane assembly 2 presses the piston 73 in the second pressure measuring tube 72 upward, and the whey protein liquid at the second discharge port 23 of the ceramic membrane assembly 2 presses the piston 73 of the second pressure measuring tube 72 downward. The two pistons 73 slide toward each other, and the two branches The support 74 interacts with the adjacent pressure sensors 78 respectively. The two pressure sensors 78 are both connected to the input end of the PLC control. The through-hole PLC controller calculates and displays the pressure difference between the inlet and outlet of the ceramic membrane assembly 2. The first flow meter 91 monitors the flow of skimmed milk, and the second flow meter 92 monitors the flow in the casein concentrate outlet pipe 4. By monitoring the inlet and outlet flow and the inlet and outlet pressure difference of the ceramic membrane assembly 2, the permeability of the ceramic membrane assembly 2 is monitored in real time, which is convenient for timely replacement. Before stopping the delivery of skimmed milk, the electromagnet ring 84 is energized and magnetically attracted to the adjacent iron ring 75. The servo motor 86 drives the worm 87 and the worm gear 85 to engage and transmit. The screw 81 and the worm gear 85 rotate synchronously. The two lifting plates 82 move away from each other, driving the two pistons 73 to slide synchronously, respectively pushing out the liquid in the first pressure measuring tube 71 and the second pressure measuring tube 72. After stopping the delivery of skimmed milk, the drive assembly drives the two pistons 73 to reset.

[0048] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A ceramic membrane microfiltration device for separating milk whey protein, comprising a square frame, a ceramic membrane assembly, a feed pipe, a casein concentrate outlet pipe, a whey protein liquid outlet pipe, and a flushing pipe, characterized in that: The plurality of ceramic membrane assemblies are distributed in an array, and the ceramic membrane assemblies are installed in a square frame through a support assembly. A feed pipe group is provided between the ceramic membrane assembly and the feed pipe, a first discharge pipe group is provided between the ceramic membrane assembly and the casein concentrate outlet pipe, a second discharge pipe group is provided between the ceramic membrane assembly and the whey protein liquid outlet pipe, a backwash pipe group is provided between the plurality of second discharge pipe groups, and a pressure measuring assembly is provided between the feed pipe group and the discharge pipe group; The support assembly includes a plurality of horizontal braces distributed in an array, wherein the horizontal braces are fixedly installed between the two long sides of the rectangular bottom surface of the square frame, wherein two vertical braces are fixedly installed on the top of two of the horizontal braces, and a bearing plate is fixedly installed between the two vertical braces arranged parallel to the long sides of the square frame, and a plurality of U-shaped frames are arranged on the side away from the two bearing plates, and the number of the U-shaped frames is the same as that of the ceramic membrane assembly; The feed pipe group includes a first branch pipe and a second branch pipe, the first branch pipe and the second branch pipe are connected to the ceramic membrane assembly and the feed pipe respectively, the first discharge pipe group includes a bend pipe and a liquid outlet pipe, the ceramic membrane assembly is connected to the casein concentrate outlet pipe through the bend pipe and the liquid outlet pipe, and the second discharge pipe group includes a first clear liquid outlet pipe and a second clear liquid outlet pipe, the first clear liquid outlet pipe and the second clear liquid outlet pipe are connected to the ceramic membrane assembly and the whey protein liquid outlet pipe respectively; The pressure measuring assembly includes a first pressure measuring tube and a second pressure measuring tube that are transparently arranged, the first pressure measuring tube being installed between the first clear liquid outlet pipe and the second clear liquid outlet pipe through a three-way joint, the second pressure measuring tube being installed between the first branch pipe and the second branch pipe through a three-way joint, the first pressure measuring tube and the second pressure measuring tube being coaxially arranged, the first pressure measuring tube and the second pressure measuring tube both penetrate and are fixedly connected to the U-shaped frame, pistons are slidably installed in the first pressure measuring tube and the second pressure measuring tube, a support seat is fixedly installed on the side away from the two pistons, an iron ring is sleeved on the support seat, a force measuring assembly is provided on the adjacent ends of the first pressure measuring tube and the second pressure measuring tube, and a drive assembly for adjusting the position of the piston is provided on the U-shaped frame; The force measuring assembly includes a pressure sensor. The top wall and bottom wall of the U-shaped frame are both provided with support frames. The inward folded bottom wall of the support frame is provided with a support column. The pressure sensor is installed at one end of the support column away from the support frame. The two pressure sensors are respectively located in the first pressure measuring tube and the second pressure measuring tube.

2. A ceramic membrane microfiltration device for separating milk whey protein according to claim 1, characterized in that: A feed port is provided at the bottom of the ceramic membrane assembly, the first branch pipe is fixedly connected to the feed port via a flange, the feed pipe is provided in multiple sections, and the multiple sections of the feed pipe are fixedly connected via a four-way joint.

3. A ceramic membrane microfiltration device for separating milk whey protein according to claim 1, characterized in that: A first discharge port is provided at the top of the ceramic membrane assembly, the bent pipe is fixedly connected to the first discharge port via a flange, the bent pipe is fixedly connected to the liquid discharge pipe, the liquid discharge pipe is fixedly connected to the casein concentrate discharge pipe via a four-way joint, the casein concentrate discharge pipe is arranged in multiple sections, and the multiple sections of the casein concentrate discharge pipe are fixedly connected via a four-way joint.

4. A ceramic membrane microfiltration device for separating milk whey protein according to claim 1, characterized in that: The top of the ceramic membrane assembly is provided with a second discharge port, the first clear liquid discharge pipe is fixedly connected to the second discharge port through a flange, the whey protein liquid discharge pipe is arranged in multiple sections, and the multiple sections of the whey protein liquid discharge pipe are fixedly connected through a four-way joint.

5. A ceramic membrane microfiltration device for separating milk whey protein according to claim 4, characterized in that: The backwash pipe group includes a third through pipe, the second discharge port, the first clear liquid outlet pipe and the third through pipe are connected through a three-way joint, the flushing pipe is connected to the ceramic membrane assembly through the third through pipe, the side wall of the third through pipe is provided with a second solenoid valve, and the side wall of the first clear liquid outlet pipe is provided with a first solenoid valve.

6. A ceramic membrane microfiltration device for separating milk whey protein according to claim 1, characterized in that: The drive assembly includes a screw, which passes through and is rotatably installed on the two horizontal sections of the U-shaped frame. The screw is threadedly connected to two lifting plates, and the lifting plates are fixedly sleeved with a shell through a through hole. The two shells are respectively slidably sleeved with the first pressure measuring tube and the second pressure measuring tube. An electromagnet ring is provided in the shell, and the two electromagnet rings are respectively sleeved with the first pressure measuring tube and the second pressure measuring tube. A worm gear is keyed to the middle part of the screw, and a servo motor is provided on the side wall of the vertical section of the U-shaped frame. The output shaft of the servo motor is connected to a worm gear through a coupling, and the worm gear is meshed with the worm gear.

7. A ceramic membrane microfiltration device for separating milk whey protein according to claim 6, characterized in that: The screw rod is provided with two sections of threads with the same pitch and opposite rotation directions, and the two lifting plates are matched with adjacent threads respectively.

8. The ceramic membrane microfiltration device for separating milk whey protein according to claim 1, characterized in that: A first flow meter is provided near the open end of the feed pipe, and a second flow meter is provided near the open end of the casein concentrate outlet pipe.

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