A purification concentration apparatus and a purification method for starch syrup processing

Abstract

The application discloses a kind of purification concentration equipment and purification method for starch syrup processing, it is related to heat exchange equipment field, including filter press, ion exchanger and falling film evaporator, filter press includes several filter plates and push plate assembly;Push plate assembly is provided with cleaning assembly, and push plate assembly includes push plate block, and push plate block can drive cleaning assembly horizontal movement, when push plate block is located at corresponding filter plate position and rises after.Cleaning brush and cleaning spray head remove filter residue on filter plate, ensure that filter plate is neat, so that cleaning brush and cleaning spray head can clean different positions on filter plate, improve cleaning effect, so that cleaning spray head still has larger cleaning area when using high-pressure water column to clean filter plate, prevent cleaning dead angle, lifting unit can impact force block when periodic translation makes filter plate vibrate, so that filter residue on filter cake on filter plate can quickly separate, improve cleaning efficiency.

Description

Technical Field

[0001] This invention relates to the field of heat exchange equipment, and in particular to a purification and concentration device and a purification method for starch syrup processing. Background Technology

[0002] Purification and concentration equipment is used to separate target substances from mixtures and improve their purity. These devices can be designed based on various physical or chemical principles, including distillation, membrane separation, and adsorption. In the concentration process, liquid filtration is necessary; filtration equipment effectively removes solid particles or suspended matter from the liquid, thereby improving its purity and concentration efficiency. This is crucial for subsequent processing steps, ensuring the quality of the final product. Plate filters are commonly used.

[0003] A plate filter is a solid-liquid separation device that uses multiple parallel filter plates to achieve the filtration process. These plates form a filtration unit. Under pressure, liquid passes through the filter medium (usually filter cloth or filter paper), while solid particles are trapped on the filter medium to form a filter cake. The design of plate filters allows for highly efficient filtration.

[0004] Chinese patent application CN109654904A discloses a novel plate heat exchanger for a concentrator unit, comprising a shell and heat exchange components. The heat exchange components, which are heat exchange tubes, are disposed within the shell. A insertion groove is provided at the lower end of the heat exchange tube, into which the heat exchange tube is inserted. A pressure ring is provided between the insertion groove and the heat exchange tube. A heat source inlet is provided on the heat exchange tube. An aluminum plate is provided at the upper end of the heat exchange tube, located on the lower side of the shell. A temperature tester is provided on the heat exchanger to monitor temperature changes in real time, making the heat exchanger more convenient to use. The heat exchange tubes disposed within the heat exchanger enable heat exchange within the tubes. The insertion groove better secures the heat exchange tubes, making their working efficiency more stable.

[0005] Chinese patent CN109186290B discloses a heat exchanger for concentrating soluble soybean polysaccharides, including a shell. A hot fluid inlet is fixedly welded to the top of the left end of the shell, and a hot fluid outlet is fixedly welded to the bottom of the right end. A non-condensable gas outlet pipe is provided at the top of the hot fluid outlet. A pipe plug is sleeved on the non-condensable gas outlet pipe and slidably fitted thereto. Horizontal through holes are provided on both sides of the pipe plug, penetrating the non-condensable gas outlet pipe. A column is fixedly connected to the top of the non-condensable gas outlet pipe, and a baffle is fixedly connected to the column. A round rod is fixedly connected to the baffle and slidably fitted thereto, penetrating the center of the pipe plug. An elastic element is provided between the baffle and the pipe plug. Using a fixed tube sheet heat exchanger as the heat exchanger for concentrating soluble soybean polysaccharides, the structure is simple and the manufacturing cost is low. The non-condensable gas in the hot fluid can be automatically discharged through the pipe plug inside the non-condensable gas outlet pipe, reducing the amount of useful steam carried out, and is suitable for continuous production.

[0006] The existing technology also has the following drawbacks: When using a plate filter press to filter liquid, filter cake easily adheres to the filter plate. After separating the filter plate, it is necessary to clean the filter plate, which is time-consuming and laborious. Moreover, the filter cake easily forms on the filter plate and adheres more firmly to the filter plate, making it difficult to clean. When using water to rinse the filter plate to clean the filter cake, if a dispersed mist water flow is used to clean the filter plate, the water pressure is lower, resulting in poor cleaning effect on the filter cake and filter cake. If a columnar water flow is used for cleaning, the water column has a small cleaning area on the filter plate, resulting in dead corners.

[0007] Therefore, this application provides a purification and concentration device and a purification method for starch syrup processing to meet the needs. Summary of the Invention

[0008] The purpose of this application is to provide a purification and concentration device and a purification method for starch syrup processing. The device uses a cleaning brush and a cleaning nozzle to remove filter residue from the filter plate, ensuring the filter plate is clean. The cleaning brush and cleaning nozzle can clean different positions on the filter plate, improving the cleaning effect. When the cleaning nozzle uses a high-pressure water jet to clean the filter plate, it still has a large cleaning area, preventing cleaning dead corners. The lifting unit can impact the force block during periodic translation, causing the filter plate to vibrate and allowing the clumps of filter residue on the filter plate to be quickly removed, thus improving cleaning efficiency.

[0009] To achieve the above objectives, this application provides the following technical solution: a purification and concentration device, comprising a filter press, an ion exchanger, and a falling film evaporator, wherein the filter press comprises a plurality of filter plates and a pusher plate assembly; a cleaning component is provided on the pusher plate assembly, the pusher plate assembly comprising a pusher plate, the pusher plate being capable of driving the cleaning component to move horizontally, and when the pusher plate is located at the corresponding filter plate position and rises, the pusher plate being capable of driving the corresponding filter plate to move horizontally;

[0010] The cleaning assembly is located below the filter plate. The cleaning assembly includes a lifting unit, a cleaning unit, and a translation unit. The cleaning unit is mounted on the lifting unit and can drive the cleaning unit to move vertically. The cleaning unit includes a cleaning brush and a cleaning nozzle. The translation unit can push the lifting unit to move back and forth.

[0011] The lifting unit includes an impact bar, and force-bearing blocks are fixedly installed on both sides of the filter plate. When the lifting unit moves periodically, the impact bar periodically impacts the force-bearing blocks.

[0012] Preferably, the filter press further includes a filter screen, a feed pipe, a liquid outlet pipe, and an air inlet pipe. Filter cavities are provided on both sides of the filter plate, and a filter screen is fixedly installed in the filter cavity. A feed pipe is fixedly installed at the center of the filter plate, and a liquid outlet pipe is fixedly installed at each of the four corners of the filter plate. The liquid outlet pipe is connected to the filter cavity. An air inlet pipe is fixedly installed at the top of the filter plate and is connected to the filter cavity.

[0013] Preferably, the lifting unit includes several sets of lifting components arranged vertically. Each lifting component includes two lifting rods, which are hinged together at their centers. The ends of the lifting rods in two adjacent sets of lifting components are also hinged together.

[0014] Preferably, the cleaning unit further includes a cleaning frame, a cleaning stabilizing block, and a cleaning stabilizing rod. The cleaning brush and the cleaning nozzle are both fixedly installed on the outer wall of the cleaning frame. The corresponding end of the lifting rod is hinged to the cleaning stabilizing block. The cleaning stabilizing rod is fixedly installed inside the cleaning frame. The cleaning stabilizing block is sleeved on the cleaning stabilizing rod and slides in cooperation with it. The cleaning unit also includes two stabilizing springs. A connecting block is fixedly installed at the center of the cleaning frame. One end of each of the two stabilizing springs is fixedly installed on both sides of the connecting block, and the other end of each of the two stabilizing springs is fixedly installed on the corresponding cleaning stabilizing block.

[0015] Preferably, the lifting unit further includes a lifting motor, a lifting belt, a lifting screw and a lifting frame, a lifting stabilizing block and a lifting stabilizing rod. Both ends of the lifting stabilizing rod are fixedly installed inside the lifting frame. The lifting screw is rotatably connected inside the lifting frame. The lifting motor is fixedly installed on the lifting frame. The lifting belt includes a driving pulley, a driven pulley, and a connecting belt. The driving pulley is fixedly installed at the output end of the lifting motor. The driven pulley is fixedly installed on the lifting screw. The connecting belt connects the driving pulley and the driven pulley. The lifting stabilizing rod passes through the lifting stabilizing block and slides with it. The lifting screw passes through the lifting stabilizing block and is threadedly connected to it. The corresponding end of the lifting rod is hinged to the lifting stabilizing block. The impact strip is fixedly installed on both sides of the lifting frame.

[0016] Preferably, the translation unit includes a fixed plate, a translation block, and a translation electric actuator. The fixed plate is fixedly installed at the bottom of the lifting frame. The fixed plate has a translation groove corresponding to the translation block. The translation block is slidably fitted in the translation groove. One end of the translation electric actuator is fixedly installed on the groove wall of the translation groove, and the output end of the translation electric actuator is fixedly installed on the translation block.

[0017] Preferably, the pusher assembly includes a pusher motor, a pusher screw, a moving block, a moving frame, and a pusher electric actuator. The pusher screw is fixedly installed at the output end of the pusher motor. The moving block is sleeved on the pusher screw and threadedly connected to it. The moving frame is fixedly installed on the moving block. The pusher electric actuator is fixedly installed inside the moving frame. The pusher plate is fixedly installed at the output end of the pusher electric actuator. Pushing blocks are fixedly installed on both sides of the filter plate. The pusher plate has a pushing groove that cooperates with the pushing block. A fixed side plate is fixedly installed at the bottom of the moving block. The fixed plate is fixedly installed on the fixed side plate.

[0018] Preferably, the filter press further includes a fixed frame, a moving strip, and moving wheels. The filter plate is disposed on the fixed frame, the push plate motor is fixedly installed on the fixed frame, the push plate screw is rotatably connected to the fixed frame, the moving strip is fixedly installed on the fixed frame, the bottom of the push block is provided with a moving groove, and a moving wheel is rotatably connected in the moving groove, the moving wheel abutting against the moving strip.

[0019] Preferably, the filter press further includes a thrust plate, a pressing plate, a pressing hydraulic cylinder, a discharge conveyor belt, a discharge pipe, an inlet pipe, and a compressed air pipe. A thrust plate is provided on one side of the filter plate, and a pressing plate is provided on the other side of the filter plate. The thrust plate is fixedly installed on the fixed frame. A pressing hydraulic cylinder is fixedly installed on the fixed frame. The output end of the pressing hydraulic cylinder is fixedly installed on the pressing plate. A discharge conveyor belt is provided at the bottom of the fixed frame. A discharge pipe is installed on the thrust plate corresponding to the liquid outlet pipe. An inlet pipe is installed on the thrust plate corresponding to the feed pipe. A compressed air pipe is installed on the thrust plate corresponding to the air inlet pipe.

[0020] A primary filter tube is provided between the filter press and the ion exchanger, and a secondary filter tube is provided between the ion exchanger and the falling film evaporator. A concentration outlet tube is provided on the falling film evaporator. A heat exchange plate is provided between the ion exchanger and the falling film evaporator. The heat exchange plate has several transverse channels and several longitudinal channels. The secondary filter tube is connected to the transverse channels, and the concentration outlet tube is connected to the longitudinal channels.

[0021] Preferably, it includes the following steps:

[0022] The sugar solution is passed through a series of filter plates, which filter the sugar solution and the residue is filtered out between the filter plates.

[0023] After filtration is completed, the pusher plate assembly drives the cleaning component to move horizontally. When the pusher plate assembly moves to the bottom of the corresponding filter plate, the pusher plate rises. Then the pusher plate assembly moves in the opposite direction, and the pusher plate drives the filter plate to move, separating the two corresponding filter plates.

[0024] Then the lifting unit drives the cleaning unit to rise, the cleaning brush removes the filter residue on the filter plate, and the cleaning nozzle sprays out liquid to rinse the filter plate.

[0025] The translation unit drives the lifting unit and cleaning unit to move periodically, and the cleaning brush and cleaning nozzle move periodically to clean the filter residue at different positions on the filter plate. When the lifting unit moves periodically, it hits the force block, and the force block causes the filter plate to vibrate, causing the filter residue to fall off.

[0026] The filtered sugar solution is then removed by ion exchange using an ion exchanger.

[0027] After the sugar solution is treated by the ion exchanger, it enters the falling film evaporator for evaporation and concentration. The sugar solution is then passed between several filter plates. The pressing plate moves and squeezes the multiple filter plates, which filter the sugar solution. The filter residue is filtered between the multiple filter plates.

[0028] After filtration, the pressing plate moves in the opposite direction, leaving a gap between the pressing plate and the nearest filter plate. The push plate assembly drives the cleaning assembly to move horizontally. When the push plate assembly moves to the bottom of the filter plate closest to the pressing plate, the cleaning unit is located between the corresponding filter plate and the pressing plate. The lifting unit drives the cleaning unit to rise, and the cleaning brush removes the filter residue on the opposite side of the filter plate and the pressing plate. The cleaning nozzle sprays liquid to rinse the filter plate and the pressing plate.

[0029] Then the pusher plate assembly moves to the bottom of the next filter plate in sequence, the pusher plate rises, and then the pusher plate assembly moves in the opposite direction, the pusher plate drives the filter plate to move, separating the two corresponding filter plates.

[0030] Then the lifting unit drives the cleaning unit to rise, the cleaning brush removes the filter residue on the corresponding side of the two filter plates, and the cleaning nozzle sprays out liquid to rinse the filter plates.

[0031] Until the push plate assembly moves to below the thrust plate, at which point there is a gap between the thrust plate and the nearest filter plate, the lifting unit drives the cleaning unit to rise, the cleaning brush removes the filter residue on the opposite side of the thrust plate and the filter plate, and the cleaning nozzle sprays out liquid to rinse the filter plate and the thrust plate.

[0032] The translation unit drives the lifting unit and cleaning unit to move periodically, and the cleaning brush and cleaning nozzle move periodically to clean the filter residue at different positions on the filter plate. When the lifting unit moves periodically, it hits the force block, and the force block causes the filter plate to vibrate, causing the filter residue to fall off.

[0033] The filtered sugar solution is then removed by ion exchange using an ion exchanger.

[0034] After being processed by an ion exchanger, the sugar solution enters a falling film evaporator for evaporation and concentration.

[0035] In summary, the technical effects and advantages of this invention are as follows:

[0036] 1. In this invention, when the pusher plate assembly pushes the filter plate to move and separate, the lifting unit drives the cleaning brush and cleaning nozzle to move, so that the cleaning brush and cleaning nozzle remove the filter residue on the filter plate, ensuring that the filter plate is clean, preventing the filter plate from clogging, and enabling the filter plate to quickly enter the next filtration operation.

[0037] 2. In this invention, the translation unit drives the lifting unit and the cleaning unit to translate periodically, so that the cleaning brush and the cleaning nozzle can translate periodically on the filter plate, thereby enabling the cleaning brush and the cleaning nozzle to clean different positions on the filter plate, improving the cleaning effect, and ensuring that the cleaning nozzle still has a large cleaning area when using high-pressure water jets to clean the filter plate, thus preventing cleaning dead corners.

[0038] 3. In this invention, the lifting unit can impact the force block during periodic translation, causing the filter plate to vibrate, which allows the filter residue clumps on the filter plate to detach quickly, improving cleaning efficiency and solving the problem of poor cleaning effect of the cleaning brush on the clumps of filter residue. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of the filter press, ion exchanger, falling film evaporator and heat exchange plate in this invention;

[0041] Figure 2 This is a schematic diagram of the filter plate and pusher plate assembly in this invention;

[0042] Figure 3 This is a schematic diagram of the structure of the filter plate, pusher plate assembly, and cleaning assembly in this invention;

[0043] Figure 4 This is a schematic diagram of the structure of the clamping plate, filter plate and thrust plate in this invention;

[0044] Figure 5 For the present invention Figure 4 Enlarged view of section A;

[0045] Figure 6 This is a schematic diagram of the structure of the filter plate, the pressing plate, and the fixing frame in this invention;

[0046] Figure 7 For the present invention Figure 6 Enlarged view of section B;

[0047] Figure 8 This is a schematic diagram of the filter plate and fixing frame in this invention;

[0048] Figure 9 For the present invention Figure 8 Enlarged view of section C;

[0049] Figure 10 This is a schematic diagram of the force-bearing block, push plate screw, and moving block in this invention;

[0050] Figure 11 For the present invention Figure 10 Enlarged view of section D;

[0051] Figure 12 This is a schematic diagram of the structure of the filter plate, discharge pipe, inlet pipe and compressed air pipe in this invention;

[0052] Figure 13 For the present invention Figure 12 Enlarged view of section E in the middle;

[0053] Figure 14 This is a schematic diagram of the structure of the filter plate, filter screen, feed pipe, liquid outlet pipe and air inlet pipe in this invention.

[0054] In the diagram: 1. Filter press; 101. Filter plate; 102. Force block; 103. Filter screen; 104. Feed pipe; 105. Liquid outlet pipe; 106. Air inlet pipe; 107. Pushing block; 108. Fixed frame; 109. Moving strip; 110. Moving wheel; 111. Thrust plate; 112. Pressing plate; 113. Pressing hydraulic cylinder; 114. Discharge conveyor belt; 115. Discharge pipe; 116. Discharge inlet pipe; 117. Compressed air pipe; 2. Ion exchanger; 3. Falling film evaporator; 4. Pusher plate assembly; 41. Pusher plate; 42. Pusher plate motor; 43. Pusher plate screw; 44. Moving block; 45. Moving frame; 46. Pusher plate electric push rod; 5. 51. Cleaning components; 51. Lifting unit; 511. Impact bar; 512. Lifting rod; 513. Lifting motor; 514. Lifting belt; 515. Lifting screw; 516. Lifting frame; 517. Lifting stabilizing block; 518. Lifting stabilizing rod; 52. Cleaning unit; 521. Cleaning brush; 522. Cleaning nozzle; 523. Cleaning frame; 524. Cleaning stabilizing block; 525. Cleaning stabilizing rod; 526. Stabilizing spring; 53. Translation unit; 531. Fixing plate; 532. Translation block; 533. Translation electric actuator; 6. Fixing side plate; 7. Primary filter tube; 8. Secondary filter tube; 9. Concentrated outlet tube; 10. Heat exchange plate. Detailed Implementation

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] Example 1: Reference Figure 1 - Figure 14 The purification and concentration equipment shown includes a filter press 1, an ion exchanger 2, and a falling film evaporator 3. The filter press 1 includes a plurality of filter plates 101 and a pusher plate assembly 4. A cleaning component 5 is provided on the pusher plate assembly 4. The pusher plate assembly 4 includes a pusher plate 41. The pusher plate 41 can drive the cleaning component 5 to move horizontally. When the pusher plate 41 is located at the position of the corresponding filter plate 101 and rises, the pusher plate 41 can drive the corresponding filter plate 101 to move horizontally.

[0057] The cleaning component 5 is located below the filter plate 101. The cleaning component 5 includes a lifting unit 51, a cleaning unit 52, and a translation unit 53. The cleaning unit 52 is mounted on the lifting unit 51. The lifting unit 51 can drive the cleaning unit 52 to move vertically. The cleaning unit 52 includes a cleaning brush 521 and a cleaning nozzle 522. The translation unit 53 can push the lifting unit 51 to move back and forth.

[0058] The lifting unit 51 includes an impact bar 511, and force blocks 102 are fixedly installed on both sides of the filter plate 101. When the lifting unit 51 moves periodically, the impact bar 511 periodically impacts the force blocks 102.

[0059] The sugar solution is passed through several filter plates 101, which filter the sugar solution. Filter residue is filtered between the filter plates 101. After filtration, the pusher assembly 4 drives the cleaning assembly 5 to move horizontally, moving the pusher assembly 4 to the side of the first filter plate 101 closest to it. The cleaning assembly 5 is located on the side of the first filter plate 101 away from the other filter plates 101. The lifting unit 51 drives the cleaning unit 52 to rise, and the cleaning brush 521 brushes away the filter residue on one side of the filter plate 101. The cleaning nozzle 522 sprays liquid to rinse one side of the filter plate 101. Then, the pusher assembly 4 moves to the next filter plate 101 in sequence. When the pusher assembly 4 moves to the corresponding filter plate 101, the push plate 41 rises. Then, the pusher assembly 4 moves in the opposite direction, and the push plate 41 drives the filter plate 101 to move, separating the two corresponding filter plates 101. Then, the lifting unit 51 drives the cleaning unit 52 to rise, and the cleaning brush 521 cleans the two filter plates. The filter residue on opposite sides of the filter plates 101 is brushed off, and the cleaning nozzle 522 sprays liquid to rinse the opposite sides of the two filter plates 101. Finally, the push plate assembly 4 moves the cleaning unit 52 to the side of the last filter plate 101 away from the other filter plates 101. The lifting unit 51 lifts the cleaning unit 52, and the cleaning brush 521 brushes off the filter residue on one side of the filter plate 101. The cleaning nozzle 522 sprays liquid to rinse one side of the filter plate 101. The translation unit 53 drives the lifting unit 51 and the cleaning unit 52 to translate periodically. The cleaning brush 521 and the cleaning nozzle 522 translate periodically to clean the filter residue at different positions on the filter plate 101. When the lifting unit 51 translates periodically, it hits the force block 102. The force block 102 causes the filter plate 101 to vibrate, causing the filter residue to detach. The filtered sugar solution is removed by ion exchange in the ion exchanger 2. After being processed by the ion exchanger 2, the sugar solution enters the falling film evaporator 3 for evaporation and concentration.

[0060] When the pusher assembly 4 pushes the filter plate 101 to move and separate, the lifting unit 51 drives the cleaning brush 521 and cleaning nozzle 522 to move, so that the cleaning brush 521 and cleaning nozzle 522 remove the filter residue on the filter plate 101, ensuring that the filter plate 101 is clean and preventing the filter plate 101 from clogging, so that the filter plate 101 can quickly enter the next filtration operation. At the same time, the translation unit 53 drives the lifting unit 51 and the cleaning unit 52 to periodically translate, so that the cleaning brush 521 and cleaning nozzle 522 periodically translate on the filter plate 101. The movement of the cleaning brush 521 and the cleaning nozzle 522 allows them to clean different areas of the filter plate 101, improving the cleaning effect. When the cleaning nozzle 522 uses a high-pressure water jet to clean the filter plate 101, it still has a large cleaning area, preventing cleaning dead corners. When the lifting unit 51 moves periodically, it can hit the force block 102 to make the filter plate 101 vibrate, allowing the filter residue clumps on the filter plate 101 to be quickly removed, improving cleaning efficiency and solving the problem of poor cleaning effect of the cleaning brush 521 on the clumps of filter residue.

[0061] Example 2, refer to Figure 1 - Figure 14 Unlike the above embodiments, the filter press 1 also includes a filter screen 103, a feed pipe 104, a liquid outlet pipe 105, and an air inlet pipe 106. Filter chambers are provided on both sides of the filter plate 101, and the filter screen 103 is fixedly installed in the filter chamber. The feed pipe 104 is fixedly installed at the center of the filter plate 101. The liquid outlet pipe 105 is fixedly installed at each of the four corners of the filter plate 101 and is connected to the filter chamber. The air inlet pipe 106 is fixedly installed at the top of the filter plate 101 and is connected to the filter chamber.

[0062] The feed pipe 104 introduces the liquid to be filtered into the space between multiple filter plates 101. The filtrate enters the filter chamber, where impurities are filtered by the filter screen 103. The filtrate in the filter chamber is discharged through the outlet pipe 105. Then, compressed gas is introduced through the air inlet pipe 106. The compressed gas squeezes the filter residue between two filter plates 101. The compressed gas carries the filtrate squeezed out through the outlet pipe 105.

[0063] Example 3, referring to Figure 1 - Figure 14 Unlike the above embodiments, the lifting unit 51 includes several sets of lifting components, which are arranged vertically. Each lifting component includes two lifting rods 512, which are hinged to each other at their centers. The ends of the lifting rods 512 in two adjacent sets of lifting components are also hinged to each other.

[0064] When the ends of the two lifting rods 512 in the lifting component approach each other, the height of the two lifting rods 512 increases and drives the ends of the lifting rods 512 in another set of lifting components to approach each other, causing multiple lifting rods 512 to rotate from a near-horizontal state to a near-vertical state, thereby increasing the height of the lifting component and driving the cleaning unit 52 to rise, and conversely, driving the cleaning unit 52 to fall.

[0065] Example 4, refer to Figure 1 - Figure 14 Unlike the above embodiments, the cleaning unit 52 also includes a cleaning frame 523, a cleaning stabilizing block 524, and a cleaning stabilizing rod 525. The cleaning brush 521 and the cleaning nozzle 522 are both fixedly installed on the outer wall of the cleaning frame 523. The end of the corresponding lifting rod 512 is hinged to the cleaning stabilizing block 524. The cleaning stabilizing rod 525 is fixedly installed inside the cleaning frame 523. The cleaning stabilizing block 524 is sleeved on the cleaning stabilizing rod 525 and slides in cooperation with the cleaning stabilizing rod 525. The cleaning unit 52 also includes two stabilizing springs 526. A connecting block is fixedly installed at the center of the cleaning frame 523. One end of the two stabilizing springs 526 is fixedly installed on both sides of the connecting block, and the other end of the two stabilizing springs 526 is fixedly installed on the corresponding cleaning stabilizing block 524.

[0066] The lifting rod 512 rises, causing the cleaning frame 523 to rise. The lifting rod 512 causes the cleaning stabilizing block 524 to move on the cleaning stabilizing rod 525. The cleaning stabilizing block 524 compresses the stabilizing spring 526. The stabilizing spring 526 makes the distance between the ends of the two lifting rods 512 and the center position of the cleaning frame 523 consistent. This allows the translation unit 53 to drive the lifting rod 512 to move periodically, and the stabilizing spring 526 to drive the cleaning frame 523 to move periodically. The cleaning frame 523 causes the cleaning brush 521 and the cleaning nozzle 522 to rise. The cleaning brush 521 abuts against one side of the filter plate 101. During the movement, the cleaning brush 521 brushes away the filter residue on one side of the filter plate 101. The cleaning nozzle 522 sprays water to rinse and clean the filter plate 101.

[0067] Example 5, refer to Figure 1 - Figure 14Unlike the above embodiments, the lifting unit 51 also includes a lifting motor 513, a lifting belt 514, a lifting screw 515, a lifting frame 516, a lifting stabilizing block 517, and a lifting stabilizing rod 518. The two ends of the lifting stabilizing rod 518 are fixedly installed inside the lifting frame 516. The lifting screw 515 is rotatably connected inside the lifting frame 516. The lifting motor 513 is fixedly installed on the lifting frame 516. The lifting belt 514 includes a drive pulley, a driven pulley, and a connecting belt. The drive pulley is fixedly installed at the output end of the lifting motor 513. The driven pulley is fixedly installed on the lifting screw 515. The connecting belt is connected to the drive pulley and the driven pulley. The lifting stabilizing rod 518 passes through the lifting stabilizing block 517 and slides with the lifting stabilizing block 517. The lifting screw 515 passes through the lifting stabilizing block 517 and is threadedly connected to the lifting stabilizing block 517. The end of the corresponding lifting rod 512 is hinged to the lifting stabilizing block 517. The impact bar 511 is fixedly installed on both sides of the lifting frame 516.

[0068] The lifting motor 513 drives the lifting screw 515 to rotate, and the lifting stabilizing block 517 moves on the lifting screw 515. The lifting screw 515 is symmetrically threaded. The two lifting stabilizing blocks 517 move closer to each other. The lifting stabilizing blocks 517 drive the ends of the two lifting rods 512 to move closer to each other. The lifting rod 512 at the top drives the cleaning stabilizing block 524 to move on the cleaning stabilizing rod 525. The lifting rod 512 drives the cleaning unit 52 to rise, and conversely, drives the cleaning unit 52 to fall.

[0069] Example 6, refer to Figure 1 - Figure 14 Unlike the above embodiments, the translation unit 53 includes a fixed plate 531, a translation block 532, and a translation electric actuator 533. The fixed plate 531 is fixedly installed at the bottom of the lifting frame 516. The fixed plate 531 has a translation groove corresponding to the translation block 532. The translation block 532 is slidably fitted in the translation groove. One end of the translation electric actuator 533 is fixedly installed on the groove wall of the translation groove, and the output end of the translation electric actuator 533 is fixedly installed on the translation block 532.

[0070] The translation electric actuator 533 drives the translation block 532 to move periodically, the translation block 532 drives the lifting frame 516 to move periodically, the lifting frame 516 drives the lifting stabilizing block 517 to move periodically via the lifting screw 515, the lifting stabilizing block 517 drives the lifting rod 512 to move periodically, the lifting rod 512 drives the cleaning frame 523 to move periodically via the stabilizing spring 526, the cleaning frame 523 drives the cleaning brush 521 and the cleaning nozzle 522 to move periodically, so that the cleaning brush 521 and the cleaning nozzle 522 clean different positions on the filter plate 101.

[0071] Example 7, referring to Figure 1 - Figure 14Unlike the above embodiments, the pusher assembly 4 includes a pusher motor 42, a pusher screw 43, a moving block 44, a moving frame 45, and a pusher electric push rod 46. The pusher screw 43 is fixedly installed at the output end of the pusher motor 42. The moving block 44 is sleeved on the pusher screw 43 and threadedly connected to the pusher screw 43. The moving frame 45 is fixedly installed on the moving block 44. The pusher electric push rod 46 is fixedly installed inside the moving frame 45. The pusher plate 41 is fixedly installed at the output end of the pusher electric push rod 46. Pushing blocks 107 are fixedly installed on both sides of the filter plate 101. Pushing grooves that cooperate with the pushing blocks 107 are opened on the pusher plate 41. A fixed side plate 6 is fixedly installed at the bottom of the moving block 44. A fixed plate 531 is fixedly installed on the fixed side plate 6.

[0072] The push plate motor 42 drives the push plate screw 43 to rotate, and the moving block 44 moves on the push plate screw 43. The moving block 44 drives the moving frame 45 to move. When the moving frame 45 moves to below the corresponding filter plate 101, the push plate electric push rod 46 drives the push plate 41 to rise. The push block 107 is located in the push groove on the push plate 41. Then the push plate motor 42 rotates in the opposite direction, causing the moving block 44 to move in the opposite direction. The push plate 41 drives the push block 107 to move. The push block 107 drives the filter plate 101 to move away from the next filter plate 101. When the filter plate 101 moves to the distance between the two filter plates 101 is the width of the cleaning frame 523, the cleaning unit 52 rises to clean one side of the two filter plates 101. The cleaning frame 523 is provided with cleaning brushes 521 and cleaning nozzles 522 on both sides.

[0073] Example 8, referring to Figure 1 - Figure 14 Unlike the above embodiments, the filter press 1 also includes a fixed frame 108, a moving bar 109, and a moving wheel 110. The filter plate 101 is set on the fixed frame 108, the push plate motor 42 is fixedly installed on the fixed frame 108, the push plate screw 43 is rotatably connected to the fixed frame 108, the moving bar 109 is fixedly installed on the fixed frame 108, the bottom of the push block 107 is provided with a moving groove, and the moving wheel 110 is rotatably connected in the moving groove. The moving wheel 110 abuts against the moving bar 109.

[0074] When the filter plate 101 moves, the moving wheel 110 moves on the moving bar 109, which reduces the resistance to the movement of the filter plate 101 and makes the movement smoother.

[0075] Example 9, referring to Figure 1 - Figure 14Unlike the above embodiments, the filter press 1 also includes a thrust plate 111, a pressing plate 112, a pressing hydraulic cylinder 113, a discharge conveyor belt 114, a discharge pipe 115, an inlet pipe 116, and a compressed air pipe 117. A thrust plate 111 is provided on one side of the filter plate 101, and a pressing plate 112 is provided on the other side of the filter plate 101. The thrust plate 111 is fixedly installed on the fixed frame 108. A pressing hydraulic cylinder 113 is fixedly installed on the fixed frame 108. The output end of the pressing hydraulic cylinder 113 is fixedly installed on the pressing plate 112. A discharge conveyor belt 114 is provided at the bottom of the fixed frame 108. A discharge pipe 115 is installed on the thrust plate 111 at the position corresponding to the liquid outlet pipe 105. An inlet pipe 116 is installed on the thrust plate 111 at the position corresponding to the feed pipe 104. A compressed air pipe 117 is installed on the thrust plate 111 at the position corresponding to the air inlet pipe 106.

[0076] The clamping hydraulic cylinder 113 presses several filter plates 101 onto the thrust plate 111 via the clamping plate 112. There are gaps between the feed pipes 104 on the filter plates 101. The discharge pipe 116 allows the liquid to be filtered to pass between the filter plates 101. The discharge pipes 105 on the filter plates 101 are interconnected, allowing the filtrate to pass through the filter screen 103, enter the filter chamber, and then exit through the discharge pipe 115. The air inlet pipes 106 on the filter plates 101 are interconnected, allowing compressed air to flow from the compressed air pipe 117 to the air inlet pipe 111. Compressed gas is introduced into the filter chamber through the inlet pipe 106, squeezing the filter residue between the two filter plates 101. The liquid in the filter residue is squeezed out and carried away, and discharged through the outlet pipe 105. After the filter press is completed, the clamping hydraulic cylinder 113 drives the clamping plate 112 to reset. There is a gap between the clamping plate 112 and the nearest filter plate 101. The push plate assembly 4 drives the cleaning assembly 5 to move horizontally. When the push plate assembly 4 moves to the filter plate 101 closest to the clamping plate 112, the cleaning unit 52 is located under the corresponding filter plate 101. Between filter plate 101 and pressure plate 112, lifting unit 51 drives cleaning unit 52 to rise. Cleaning brush 521 removes filter residue from the opposite side of filter plate 101 and pressure plate 112. Cleaning nozzle 522 sprays liquid to rinse filter plate 101 and pressure plate 112. Then, push plate assembly 4 moves to the bottom of the next filter plate 101 in sequence, push plate 41 rises, and then push plate assembly 4 moves in the opposite direction. Push plate 41 drives filter plate 101 to move, separating the corresponding two filter plates 101. Then, lifting unit 51 drives cleaning unit 52 to rise, cleaning... The cleaning brush 521 removes the filter residue on the corresponding side of the two filter plates 101, and the cleaning nozzle 522 sprays liquid to rinse the filter plates 101. Until the push plate assembly 4 moves to the bottom of the thrust plate 111, at which point the thrust plate 111 and the nearest filter plate 101 have a gap. The lifting unit 51 drives the cleaning unit 52 to rise, and the cleaning brush 521 removes the filter residue on the opposite side of the thrust plate 111 and the filter plate 101. The cleaning nozzle 522 sprays liquid to rinse the filter plates 101 and the thrust plate 111, and then the next filter press operation is carried out.

[0077] A primary filter tube 7 is installed between the filter press 1 and the ion exchanger 2. A secondary filter tube 8 is installed between the ion exchanger 2 and the falling film evaporator 3. A concentration outlet tube 9 is installed on the falling film evaporator 3. A heat exchange plate 10 is installed between the ion exchanger 2 and the falling film evaporator 3. The heat exchange plate 10 has several transverse channels and several longitudinal channels. The secondary filter tube 8 is connected to the transverse channels, and the concentration outlet tube 9 is connected to the longitudinal channels.

[0078] The discharge pipe 115 is connected to the primary filter pipe 7. The filtered liquid enters the ion exchanger 2 to remove ionic impurities, and then enters the secondary filter pipe 8. The secondary filter pipe 8 passes the liquid into the transverse channel of the heat exchange plate 10, and then into the falling film evaporator 3. The falling film evaporator 3 heats and evaporates the liquid, concentrating it. Then, the liquid is discharged into the longitudinal channel of the heat exchange plate 10 through the concentration outlet pipe 9. The hot liquid in the longitudinal channel heats the liquid in the transverse channel. The concentrated and heated liquid preheats the liquid before it enters the falling film evaporator 3, improving energy efficiency.

[0079] A method for purifying starch syrup, using the aforementioned purification and concentration equipment, includes the following steps:

[0080] The sugar solution is passed between several filter plates 101. The pressing plate 112 moves and squeezes the multiple filter plates 101. The multiple filter plates 101 filter the sugar solution, and the filter residue is filtered between the multiple filter plates 101.

[0081] After filtration, the pressing plate 112 moves in the opposite direction, and there is a gap between the pressing plate 112 and the nearest filter plate 101. The push plate assembly 4 drives the cleaning assembly 5 to move horizontally. When the push plate assembly 4 moves to the bottom of the filter plate 101 closest to the pressing plate 112, the cleaning unit 52 is located between the corresponding filter plate 101 and the pressing plate 112. The lifting unit 51 drives the cleaning unit 52 to rise. The cleaning brush 521 brushes away the filter residue on the opposite side of the filter plate 101 and the pressing plate 112. The cleaning nozzle 522 sprays out liquid to rinse the filter plate 101 and the pressing plate 112.

[0082] Then the push plate assembly 4 moves to the bottom of the next filter plate 101 in sequence, the push plate 41 rises, and then the push plate assembly 4 moves in the opposite direction, the push plate 41 drives the filter plate 101 to move, separating the two corresponding filter plates 101. Then the lifting unit 51 drives the cleaning unit 52 to rise, the cleaning brush 521 brushes away the filter residue on the corresponding side of the two filter plates 101, and the cleaning nozzle 522 sprays out liquid to rinse the filter plates 101.

[0083] Until the push plate assembly 4 moves to below the thrust plate 111, at which point the thrust plate 111 and the nearest filter plate 101 have a gap, the lifting unit 51 drives the cleaning unit 52 to rise, the cleaning brush 521 brushes away the filter residue on the opposite side of the thrust plate 111 and the filter plate 101, and the cleaning nozzle 522 sprays out liquid to rinse the filter plate 101 and the thrust plate 111.

[0084] The translation unit 53 drives the lifting unit 51 and the cleaning unit 52 to move cyclically, and the cleaning brush 521 and the cleaning nozzle 522 move cyclically to clean the filter residue at different positions on the filter plate 101. When the lifting unit 51 moves cyclically, it hits the force block 102, and the force block 102 causes the filter plate 101 to vibrate, causing the filter residue to detach.

[0085] The filtered sugar solution is then subjected to ion exchange removal via ion exchanger 2.

[0086] After being processed by ion exchanger 2, the sugar solution enters falling film evaporator 3 for evaporation and concentration.

[0087] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A purification concentration plant comprising a filter press, an ion exchanger and a falling film evaporator, characterized in that: The filter press comprises a plurality of filter plates and a push plate assembly; a cleaning assembly is arranged on the push plate assembly; the push plate assembly comprises a push plate block; the push plate block can drive the cleaning assembly to move horizontally; when the push plate block is located at the position of the corresponding filter plate and is lifted, the push plate block can drive the corresponding filter plate to move horizontally; The filter press further comprises a filter screen, a feeding pipe, a liquid outlet pipe and an air inlet pipe; filter cavities are arranged on both sides of the filter plate; the filter screen is fixedly installed in the filter cavity; the feeding pipe is fixedly installed at the center of the filter plate; the liquid outlet pipe is fixedly installed at the four corners of the filter plate; the liquid outlet pipe is in communication with the filter cavity; the air inlet pipe is fixedly installed on the top of the filter plate; and the air inlet pipe is in communication with the filter cavity; The filter press further comprises a thrust plate, a compression plate, a compression hydraulic cylinder, a discharge conveying belt, a discharge pipe, an inlet pipe and a compressed air pipe; The filter press further comprises a fixed frame, a moving strip and a moving wheel; One side of the filter plate is provided with the thrust plate, and the other side of the filter plate is provided with the compression plate; the thrust plate is fixedly installed on the fixed frame; the compression hydraulic cylinder is fixedly installed on the fixed frame; the output end of the compression hydraulic cylinder is fixedly installed on the compression plate; the bottom of the fixed frame is provided with the discharge conveying belt; the discharge pipe is installed on the thrust plate at the position corresponding to the liquid outlet pipe; the inlet pipe is installed on the thrust plate at the position corresponding to the feeding pipe; and the compressed air pipe is installed on the thrust plate at the position corresponding to the air inlet pipe; A first-stage filter pipe is arranged between the filter press and the ion exchanger; a second-stage filter pipe is arranged between the ion exchanger and the falling film evaporator; a concentration outlet pipe is arranged on the falling film evaporator; a heat exchange plate is arranged between the ion exchanger and the falling film evaporator; a plurality of horizontal channels and a plurality of vertical channels are arranged on the heat exchange plate; the second-stage filter pipe is in communication with the horizontal channels; and the concentration outlet pipe is in communication with the vertical channels; The cleaning assembly is located below the filter plate; the cleaning assembly comprises a lifting unit, a cleaning unit and a translation unit; the cleaning unit is arranged on the lifting unit; the lifting unit can drive the cleaning unit to move vertically; the cleaning unit comprises a cleaning brush and a cleaning spray head; and the translation unit can drive the lifting unit to reciprocatingly translate; The lifting unit comprises an impact strip; force receiving blocks are fixedly installed on both sides of the filter plate; and the impact strip periodically impacts the force receiving blocks when the lifting unit periodically translates; The lifting unit comprises a plurality of groups of lifting members; the groups of lifting members are vertically arranged; each lifting member comprises two lifting rods; the two lifting rods are hingedly connected at the centers thereof; and the lifting rods in adjacent groups of lifting members are hingedly connected at the ends thereof. The cleaning unit further comprises a cleaning frame, cleaning stable blocks and a cleaning stable rod, the cleaning brush and the cleaning spray head are fixedly installed on the outer wall of the cleaning frame, the corresponding end of the lifting rod is hingedly connected to the cleaning stable blocks, the cleaning stable rod is fixedly installed in the cleaning frame, the cleaning stable blocks are sleeved on the cleaning stable rod and are in sliding fit with the cleaning stable rod, the cleaning unit further comprises two stable springs, a connecting block is fixedly installed at the center of the cleaning frame, one end of the two stable springs is fixedly installed on the two sides of the connecting block, and the other end of the two stable springs is fixedly installed on the corresponding cleaning stable blocks.

2. A purification and concentration apparatus according to claim 1, characterized in that: The lifting unit further comprises a lifting motor, a lifting belt piece, a lifting screw rod and a lifting frame, lifting stable blocks and a lifting stable rod, the two ends of the lifting stable rod are fixedly installed in the lifting frame, the lifting screw rod is rotatably connected in the lifting frame, the lifting motor is fixedly installed on the lifting frame, the lifting belt piece comprises a driving pulley, a driven pulley and a connecting belt, the driving pulley is fixedly installed on the output end of the lifting motor, the driven pulley is fixedly installed on the lifting screw rod, the connecting belt is connected between the driving pulley and the driven pulley, the lifting stable rod penetrates through the lifting stable blocks and is in sliding fit with the lifting stable blocks, the lifting screw rod penetrates through the lifting stable blocks and is in threaded connection with the lifting stable blocks, the corresponding end of the lifting rod is hingedly connected to the lifting stable blocks, and the impact strips are fixedly installed on the two sides of the lifting frame.

3. A purification and concentration apparatus according to claim 2, wherein: The translation unit comprises a fixed plate, a translation block and a translation electric push rod, the fixed plate is fixedly installed at the bottom of the lifting frame, the fixed plate is provided with a translation slot corresponding to the translation block, the translation block is in sliding fit in the translation slot, one end of the translation electric push rod is fixedly installed on the slot wall of the translation slot, and the output end of the translation electric push rod is fixedly installed on the translation block.

4. A purification and concentration apparatus according to claim 3, wherein: The push plate assembly comprises a push plate motor, a push plate screw rod, a moving block, a moving frame and a push plate electric push rod, the push plate screw rod is fixedly installed on the output end of the push plate motor, the moving block is sleeved on the push plate screw rod and is in threaded connection with the push plate screw rod, the moving frame is fixedly installed on the moving block, the push plate electric push rod is fixedly installed in the moving frame, the push plate block is fixedly installed on the output end of the push plate electric push rod, the two sides of the filter plate are both fixedly installed with push blocks, the push plate block is provided with a push slot matched with the push blocks, the bottom of the moving block is fixedly installed with a fixed side plate, and the fixed plate is fixedly installed on the fixed side plate.

5. A purification and concentration apparatus according to claim 4, wherein: The filter plate is arranged on the fixed frame, the push plate motor is fixedly installed on the fixed frame, the push plate screw rod is rotatably connected to the fixed frame, the fixed frame is fixedly installed with a moving strip, the bottom of the push block is provided with a moving slot, a moving wheel is rotatably connected in the moving slot, and the moving wheel abuts against the moving strip.

6. A method of purifying a starch syrup process using a purification concentration apparatus as claimed in claim 5, characterized in that: The method comprises the following steps: The sugar liquid is introduced between the plurality of filter plates, the compression plate is moved to extrude the plurality of filter plates, the plurality of filter plates filter the sugar liquid, and the filter residue is filtered between the plurality of filter plates; After the filtration is completed, the pressing plate moves reversely, and a gap is formed between the pressing plate and the filter plate closest to the pressing plate. The push plate assembly drives the cleaning assembly to move horizontally. When the push plate assembly moves to below the filter plate closest to the pressing plate, the cleaning unit is located between the corresponding filter plate and the pressing plate. The lifting unit drives the cleaning unit to rise. The cleaning brush brushes off the filter residue on one side of the filter plate and the pressing plate, and the cleaning nozzle sprays liquid to wash the filter plate and the pressing plate; Then the push plate assembly moves to below the next filter plate in turn, the push plate block rises, and then the push plate assembly moves reversely. The push plate block drives the filter plate to move, so as to separate the corresponding two filter plates. Then the lifting unit drives the cleaning unit to rise. The cleaning brush brushes off the filter residue on one side of the two filter plates, and the cleaning nozzle sprays liquid to wash the filter plate. Until the push plate assembly moves to below the thrust plate. At this time, the thrust plate has a gap directly with the filter plate closest to the thrust plate. The lifting unit drives the cleaning unit to rise. The cleaning brush brushes off the filter residue on one side of the thrust plate and the filter plate, and the cleaning nozzle sprays liquid to wash the filter plate and the thrust plate. The translation unit drives the lifting unit and the cleaning unit to move periodically. The cleaning brush and the cleaning nozzle move periodically to clean the filter residue at different positions on the filter plate. The lifting unit moves periodically to hit the force block. The force block drives the filter plate to vibrate, so that the filter residue is separated. The filtered sugar solution is subjected to ion exchange by an ion exchanger to remove ions. After the sugar solution is treated by the ion exchanger, it enters the falling film evaporator to be evaporated and concentrated.

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