Ceramic membrane microfiltration equipment for separating milk whey protein

Abstract

The invention relates to the technical field of milk production, and particularly discloses ceramic membrane microfiltration equipment for separating milk whey protein, which comprises a square frame, a plurality of ceramic membrane components, a feeding pipe, a casein concentrated liquid outlet pipe, a whey protein liquid outlet pipe and a flushing pipe, the ceramic membrane assembly is installed in the square frame through a supporting assembly, a feeding pipe set is arranged between the ceramic membrane assembly and the feeding pipe, a first discharging pipe set is arranged between the ceramic membrane assembly and the casein concentrated liquid outlet pipe, a second discharging pipe set is arranged between the ceramic membrane assembly and the whey protein liquid outlet pipe, and a third discharging pipe set is arranged between the ceramic membrane assembly and the whey protein liquid outlet pipe. A pressure measuring assembly is arranged between the feeding pipe set and the discharging pipe set. The permeability of the ceramic membrane assembly is monitored in real time, a visual structure is provided, timely replacement of the ceramic membrane is facilitated, a structure for pushing out liquid in the force measuring assembly is provided, and residual liquid in the force measuring assembly is avoided.

Description

Technical Field

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

[0002] At present, milk whey protein products at home and abroad are usually obtained by clarifying and separating the whey liquid, a byproduct of cheese or other casein products. The process is complicated. The cheese production uses the rennet flocculation precipitation method, which makes the whey liquid turbid and brings other milk exogenous substances, affecting the purity and quality of whey protein. The molecular sizes of casein and whey protein in milk are different. Through ceramic membranes with appropriate pore sizes, whey protein and casein in milk can be separated to obtain high-quality whey protein. At the same time, casein is not lost, and the processing volume and energy consumption of the casein product production process can be effectively reduced, 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 permeability of the membrane. This is not intuitive enough, and the ceramic membrane needs to be cleaned after the test. Not only does the test process consume 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, 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 arranged between the ceramic membrane assembly and the feed pipe, a first outlet pipe group is arranged between the ceramic membrane assembly and the casein concentrate outlet pipe, a second outlet pipe group is arranged between the ceramic membrane assembly and the whey protein liquid outlet pipe, a backwashing pipe group is arranged between the plurality of the second outlet pipe groups, and a pressure measuring assembly is arranged between the feed pipe group and the outlet 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 at the top ends 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 sides 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, 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 which are transparently arranged. 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. 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 one side of the two pistons away from each other, and an iron ring is sleeved on the support seat. A force measuring assembly is arranged on the adjacent ends of the first pressure measuring tube and the second pressure measuring tube, and a driving assembly for adjusting the position of the piston is arranged on the U-shaped frame.

[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 on 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 outlet pipe, the liquid outlet pipe is fixedly connected to the casein concentrate outlet pipe via a four-way joint, the casein concentrate outlet pipe is arranged in multiple sections, and the multiple sections of the casein concentrate outlet pipes are fixedly connected via a four-way joint.

[0012] Preferably, a second outlet is provided on the top of the ceramic membrane assembly, the first clear liquid outlet pipe is fixedly connected to the second outlet via a flange, the whey protein liquid outlet pipe is arranged in multiple sections, and the multiple sections of the whey protein liquid outlet pipes are fixedly connected via 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, a second solenoid valve is provided on the side wall of the third through pipe, and a first solenoid valve is provided on the side wall of the first clear liquid outlet pipe.

[0014] Preferably, the force measuring assembly includes a pressure sensor, the top wall and the 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 rod, which passes through and is rotatably installed on two horizontal sections of the U-shaped frame. The screw rod 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 arranged 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 rod, and a servo motor is arranged 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 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 close to the open end of the feed pipe, and a second flow meter is provided at a position close to the open end of the casein concentrate outlet pipe.

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

[0019] 1. By setting the pressure measuring assembly, the beneficial effect that can be obtained is that the ceramic membrane assemblies are distributed in an array, the ceramic membrane assemblies are installed in the square frame through the support assembly, a feed pipe group is arranged between the ceramic membrane assembly and the feed pipe, a first discharge pipe group is arranged between the ceramic membrane assembly and the casein concentrate outlet pipe, a second discharge pipe group is arranged 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 with 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 arranged at one end adjacent to the first pressure measuring tube and the second pressure measuring tube, and a driving assembly for adjusting the position of the piston is arranged on the U-shaped frame;

[0020] The skim milk is conveyed at constant pressure by a 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. A flow rate of 5-7m / s is formed on the ceramic membrane surface of the ceramic membrane assembly. The whey protein liquid passes through the 0.1um ceramic membrane filtration surface under pressure and high 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 casein content of the milk discharged from the whey protein liquid gradually increases to form a casein concentrate, which flows into the casein concentrate outlet pipe through the first outlet, the elbow and the outlet 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 outlet 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 tube. 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 piston positions in the first and second pressure measuring tubes.

[0021] 2. By setting the driving assembly, the beneficial effect that can be obtained is that the screw rod penetrates and is rotatably installed on the two horizontal sections of the U-shaped frame, the screw rod is threadedly connected to 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 arranged 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 rod, a servo motor is arranged 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;

[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, thus having a structure for pushing out the liquid in the force measuring assembly, thereby avoiding residual liquid in the force measuring assembly.

[0023] 3. By setting up the backwashing pipe group, the beneficial effect that can be obtained is that the backwashing 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;

[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 having an automatic reverse flushing structure for the ceramic filter membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order 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 structural diagram of the installation of the casein concentrate outlet pipe in the present invention;

[0029] Figure 4 This is a diagram of the installation structure of the ceramic membrane assembly in 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 It is the installation structure diagram of the driving 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] Fig. 9 It is the installation structure diagram of the force measuring assembly in the present invention;

[0035] Fig.10 It is an exploded view of the lifting plate, the casing and the 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-bearing 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, liquid 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. casing; 84. electromagnet ring; 85. worm gear; 86. servo motor; 87. worm; 91. first flow meter; 92. second flow meter. DETAILED DESCRIPTION

[0038] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are clearly and completely described below in combination with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present application, it should be understood that the orientation or position relationship indicated by "inside", "outside", etc. is based on the orientation or position described in the drawings, which is only for the convenience of describing the present 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 the present application.

[0040] Reference Figure 1-Figure 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, a plurality of ceramic membrane assemblies 2 are arranged in an array, and the ceramic membrane assembly 2 is installed in the square frame 1 through a support assembly, and the support assembly comprises a plurality of horizontal braces 11 arranged in an array, and the horizontal braces 11 are fixedly installed between two long sides of the rectangular bottom surface of the square frame 1, wherein two vertical braces 12 are fixedly installed at the top ends of the two horizontal braces 11, and a bearing plate 13 is fixedly installed between the two vertical braces 12 arranged parallel to the long sides of the square frame 1, and a plurality of U-shaped frames 14 are arranged on the side away from the two bearing plates 13, and the number of the U-shaped frames 14 and the ceramic membrane assembly 2 are arranged in the same manner, and 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, which is due to the different densities of the supporting layer materials at different positions of the membrane, and the different production water fluxes. This structure is used to compensate and balance the pressure difference between the inside and outside of the membrane, thereby achieving 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 arranged 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 pipes 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 arranged between the ceramic membrane assembly 2 and the casein concentrate outlet pipe 4, the first discharge pipe group includes a bent pipe 41 and a liquid outlet pipe 42, the ceramic membrane assembly 2 is connected to the casein concentrate outlet pipe 4 through the bent pipe 41 and the liquid outlet pipe 42, a first discharge port 22 is arranged on the top of the ceramic membrane assembly 2, the bent pipe 41 is fixedly connected to the first discharge port 22 through a flange, the bent pipe 41 is fixedly connected to the liquid outlet pipe 42, the liquid outlet pipe 42 is fixedly connected to the casein concentrate outlet pipe 4 through a four-way joint, and the casein concentrate outlet pipe 4 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 casein concentrate outlet pipes 4 are fixedly connected by four-way joints. 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 high flow conditions and enters the shell-side clear liquid flow channel. 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 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 through a four-way joint. 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.

[0044] A backwash pipe group is arranged between the 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. The side wall of the third through pipe 61 is provided with a second solenoid valve 62, and the side wall of the first clear liquid outlet pipe 51 is provided with a first solenoid valve 53. 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, and 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, and 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, and the first pressure measuring tube 71 and the second pressure measuring tube 72 are both penetrated and fixedly connected with 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 of the second pressure measuring tube 72 downward. The two pistons 73 slide toward each other, and the two support seats 74 interact 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 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, and 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, and the screw 81 is threadedly connected to two lifting plates 82, and the screw 81 is provided with two sections of threads with the same pitch and opposite rotation directions, and the two lifting plates 82 are matched with adjacent threads respectively, and the lifting plates 82 are fixedly sleeved with a sleeve 83 through a through hole, and the two sleeves 83 are respectively slidably sleeved with the first pressure measuring tube 71 and the second pressure measuring tube 72, and an electromagnet ring 84 is arranged in the sleeve 83, and the two electromagnet rings 84 are respectively sleeved with the first pressure measuring tube 71 and the second pressure measuring tube 72, and the screw 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 to magnetically attract the adjacent iron ring 75. The servo motor 86 drives the worm 87 and the worm gear 85 to mesh 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 driving assembly drives the two pistons 73 to reset.

[0047] The working principle and use process of the present invention are as follows: skimmed milk is conveyed at a constant pressure by a feed pump, enters a plurality of second branch pipes 32 and a first branch pipe 31 from a feed pipe 3, and then enters a ceramic membrane assembly 2 through a feed port 21. A flow rate of 5-7 m / s is formed on the ceramic membrane surface of the ceramic membrane assembly 2. The whey protein liquid passes through a 0.1 um ceramic membrane filtration surface under pressure and high 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 a first clear liquid outlet pipe 51 and a second clear liquid outlet pipe 52. The milk from 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 4 through a first outlet port 22, a curved pipe 41 and an outlet pipe 42. The skimmed 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 of the second pressure measuring tube 72 downward. The two pistons 73 slide toward each other, and the two branches 42 are connected to each other. The support seat 74 interacts with the adjacent pressure sensors 78 respectively. Both pressure sensors 78 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 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, and the liquid in the first pressure measuring tube 71 and the second pressure measuring tube 72 is pushed out respectively. After stopping the delivery of skimmed milk, the drive assembly drives the two pistons 73 to reset.

[0048] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments 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 (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), characterized in that: The plurality of ceramic membrane assemblies (2) are arranged in an array, the ceramic membrane assemblies (2) are installed in the square frame (1) through a supporting assembly, a feed pipe group is arranged between the ceramic membrane assembly (2) and the feed pipe (3), a first discharge pipe group is arranged between the ceramic membrane assembly (2) and the casein concentrate outlet pipe (4), a second discharge pipe group is arranged between the ceramic membrane assembly (2) and the whey protein liquid outlet pipe (5), a backwash pipe group is arranged between the plurality of the second discharge pipe groups, and a pressure measuring assembly is arranged between the feed pipe group and the discharge pipe group; The support assembly comprises a plurality of horizontal support rods (11) distributed in an array, wherein the horizontal support rods (11) are fixedly installed between 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 two of the horizontal support rods (11), and a bearing plate (13) is fixedly installed between the two vertical support rods (12) arranged parallel to the long sides of the square frame (1), and a plurality of U-shaped frames (14) are arranged on the side away from the two bearing plates (13), and the number of the U-shaped frames (14) is the same as that of the ceramic membrane assembly (2); The feed pipe group comprises 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; the first discharge pipe group comprises a bent pipe (41) and a liquid outlet pipe (42), the ceramic membrane assembly (2) is connected to the casein concentrate outlet pipe (4) through the bent pipe (41) and the liquid outlet pipe (42); the second discharge pipe group comprises 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 connected to the ceramic membrane assembly (2) and the whey protein liquid outlet pipe (5) respectively; The pressure measuring assembly comprises 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 tube (51) and the second clear liquid outlet tube (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 The U-shaped frame (14) is penetrated and fixedly connected. 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 component is arranged at the adjacent end of the first pressure measuring tube (71) and the second pressure measuring tube (72). A driving component for adjusting the position of the piston (73) is arranged on the U-shaped frame (14).

2. A ceramic membrane microfiltration device for separating milk whey protein according to claim 1, characterized in that: 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) via a flange; the feed pipe (3) is arranged in multiple sections; and the multiple sections of the feed pipe (3) 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: The ceramic membrane assembly (2) is provided with a first discharge port (22) at the top, the curved pipe (41) is fixedly connected to the first discharge port (22) via a flange, the curved pipe (41) is fixedly connected to a liquid outlet pipe (42), the liquid outlet pipe (42) is fixedly connected to a casein concentrate outlet pipe (4) via a four-way joint, the casein concentrate outlet pipe (4) is provided in multiple sections, and the multiple sections of the casein concentrate outlet pipe (4) 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 (2) is provided with a second discharge port (23); the first clear liquid discharge pipe (51) is fixedly connected to the second discharge port (23) via a flange; the whey protein liquid discharge pipe (5) is arranged in multiple sections; and the multiple sections of the whey protein liquid discharge pipe (5) are fixedly connected via a four-way joint.

5. A ceramic membrane microfiltration device for separating milk whey protein according to claim 1, characterized in that: The backwash pipe group comprises 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 via a three-way joint; the flushing pipe (6) is connected to the ceramic membrane assembly (2) via the third through pipe (61); a second solenoid valve (62) is provided on a side wall of the third through pipe (61); and a first solenoid valve (53) is provided on a side wall of the first clear liquid outlet pipe (51).

6. A ceramic membrane microfiltration device for separating milk whey protein according to claim 1, characterized in that: The force measuring assembly comprises 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 at one end of the support column (77) away from the support frame (76), and the two pressure sensors (78) are respectively located in the first pressure measuring tube (71) and the second pressure measuring tube (72).

7. A ceramic membrane microfiltration device for separating milk whey protein according to claim 1, characterized in that: The driving assembly comprises a screw (81), wherein the screw (81) penetrates through and is rotatably mounted on two horizontal sections of the U-shaped frame (14), the screw (81) is threadedly connected to two lifting plates (82), the lifting plates (82) are 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 arranged inside 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 at the middle of the screw (81), a servo motor (86) is arranged 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, and the worm (87) is meshed with the worm gear (85).

8. A ceramic membrane microfiltration device for separating milk whey protein according to claim 7, characterized in that: The screw rod (81) is provided with two sections of threads with the same pitch and opposite rotation directions, and the two lifting plates (82) are matched with adjacent threads respectively.

9. A ceramic membrane microfiltration device for separating milk whey protein according to claim 1, characterized in that: 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).

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