Filter pressing system
By combining a straight flow channel and a pulse pressing component, the problems of low filtrate discharge rate and clogging caused by high mesh filter cloth are solved, achieving stability and continuity of solid-liquid separation, and improving the filtrate discharge rate and the squeezing effect of solid particles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XIAMEN HITHIUM NEW MATERIAL TECH CO LTD
- Filing Date
- 2026-02-11
- Publication Date
- 2026-04-14
AI Technical Summary
In the existing technology, high-mesh filter cloth results in a low filtrate discharge rate, which leads to a low flow rate of the material to be filtered, making it prone to settling and causing pipeline blockage, thus affecting the continuity of solid-liquid separation.
The system employs a straight flow channel design and a pulse pressing assembly. The material is pumped into the flow channel by a drive pump, and the regulating valve is controlled by a metering device to detect parameters. Combined with the pulse pressing assembly, the material in the filter chamber is intermittently pressurized to avoid sedimentation and blockage. The pulse extrusion of the diaphragm plate ensures the stability and continuity of solid-liquid separation.
It achieves stability and continuity in solid-liquid separation, avoids material flow channel blockage, improves the filtrate discharge rate and the compression effect of solid particles, and reduces the moisture content of the filter cake.
Smart Images
Figure CN121846745A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of solid-liquid separation technology, and more specifically, to a pressure filtration system. Background Technology
[0002] Currently, plate and frame filter presses are commonly used in industry to dewater materials with high sedimentation ratios and wide particle size distributions (10μm-2mm). The standard process is as follows: the material to be filtered is pumped into the filter press from the material tank. Inside the filter press, the solid particles in the material are intercepted by the filter cloth and squeezed to form a filter cake. The filtrate after squeezing is discharged through the filter cloth.
[0003] In related technologies, high-mesh filter cloths (such as 2000 mesh) are typically used to improve the interception rate of solid particles in the filter press. However, due to the extremely low air permeability of high-mesh filter cloths, the outflow rate of the filtrate is relatively low, resulting in a low flow velocity of the filter press material when pumped into the filter press. When the flow velocity of the filter press material is low, solid particles are prone to sedimentation, causing blockage in the pipeline and affecting the continuity of the filter press material separation. Summary of the Invention
[0004] A primary objective of this application is to provide a pressure filtration system that ensures continuous solid-liquid separation.
[0005] To achieve the above-mentioned objectives, this application adopts the following technical solution: According to one aspect of this application, a filter press system is provided, comprising: a material tank having an outlet and a return outlet for holding material to be filtered; a filter press including a frame and a plurality of pressure plates stacked on the frame, and a filter device located between every two adjacent pressure plates, each pressure plate having a feed hole and a filtrate hole, the feed holes of the plurality of pressure plates forming a material flow channel, the material flow channel having a feed inlet and a return outlet, the filter device forming a filter chamber communicating with the material flow channel, and the filter device separating the filter chamber from the material flow channel. The filter outlet; a drive pump, connected to the outlet of the material tank and the inlet of the filter press, the drive pump being used to draw the material to be filtered from the material tank to the filter press, and a first metering device being provided between the drive pump and the filter press; a return pipeline, connected to the return port of the filter press and the return port of the material tank, and a regulating valve being provided on the return pipeline; a controller, electrically connected to the first metering device and the regulating valve, and used to adjust the opening of the regulating valve according to the parameters detected by the first metering device.
[0006] In this embodiment, the material to be filtered in the material tank can be pumped into the material flow channel of the filter press by a drive pump, and then enters the filter chamber formed by the filtration device. Solid-liquid separation is achieved by squeezing the material to be filtered in the filter chamber. That is, the filtrate in the material to be filtered passes through the filtration device and is discharged outward along the filtrate holes on the pressure plate, while the solid particles in the material to be filtered are squeezed into a filter cake in the filter chamber to ensure the solid-liquid separation effect of the filter press system. In addition, the parameters of the feed inlet of the filter press can be detected by a first metering device, and the regulating valve can be controlled by the detected parameters to realize the backflow control between the material flow channel and the material tank. This avoids the situation where the material to be filtered is deposited and blocked due to the low air permeability of the filtration device in the filter chamber, and thus ensures the stability and continuity of the solid-liquid separation of the filter press system.
[0007] According to one embodiment of this application, the material flow channel is a straight flow channel along the horizontal direction.
[0008] In this embodiment, the design of the straight flow channel can avoid blockage of the material flow channel caused by the sedimentation of solid particles in the material to be filtered, thereby ensuring the smooth flow between the outlet of the material flow channel and the return port of the material tank.
[0009] According to one embodiment of this application, the top of the pressure plate has a protrusion, and the protrusion has a feed hole extending through the thickness direction of the pressure plate.
[0010] In this embodiment, a feed hole is provided on the protrusion on the top of the pressure plate, so that the solid particles settling in the material to be filtered can directly settle into multiple filter chambers, thereby avoiding the compression of the cross-sectional area of the material flow channel and ensuring the smooth flow of the material to be filtered in the material flow channel.
[0011] According to one embodiment of this application, the plurality of pressure plates includes a diaphragm plate having an inner cavity and a pressing port communicating with the inner cavity; the pressure filtration system further includes a pulse pressing assembly communicating with the pressing port of the diaphragm plate, and the controller is further configured to control the pulse pressing assembly to intermittently pressurize the inner cavity of the diaphragm plate.
[0012] In this embodiment, the pulse pressing component can intermittently pressurize the inner cavity of the diaphragm plate, thereby pulse-pressing the filter material to be pressed in the filter chamber through the diaphragm plate. This causes the solid particles in the filter chamber to switch back and forth between being compressed (pressed by the diaphragm plate) and loose (not pressed by the diaphragm plate), so as to avoid large-diameter solid particles blocking the filter holes on the filter device, while ensuring the pressing effect on the solid particles in the filter chamber, so as to reduce the moisture content of the filter cake composed of solid particles in the filter chamber.
[0013] According to one embodiment of this application, the pulse pressing assembly includes a water tank, a pressurizing pump, a pressurizing pipeline, a pressure relief pipeline, and a pressure relief valve; the pressurizing pump is connected to the water tank, the pressurizing pipeline is connected to the pressurizing pump and the pressing port of the diaphragm plate respectively, and the pressure relief pipeline is connected to the pressurizing pipeline and the water tank respectively; the pressure relief valve is disposed on the pressure relief pipeline and electrically connected to the controller, and the controller is used to control the pressure relief valve to open or close intermittently.
[0014] According to one embodiment of this application, the pulse pressing assembly further includes a pulse generator, which is electrically connected to the pressure relief valve and the controller respectively; the pulse generator is used to receive a pressurization signal sent by the controller and control the pressure relief valve to open or close based on the pressurization signal.
[0015] In this embodiment of the application, by setting a pulse generator, the pulse generator can control the opening or closing of the pressure relief valve, thereby simplifying the pulse control of the pulse pressing component and improving the control efficiency of the intermittent opening or closing of the pressure relief valve.
[0016] According to one embodiment of this application, the pulse pressing assembly further includes a pressure valve and a second meter; both the pressure valve and the second meter are disposed on the pressure pipeline and are electrically connected to the controller, which is used to adjust the opening degree of the pressure valve according to the parameters detected by the second meter when the pressure valve is opened.
[0017] In this embodiment, the pressure effect of the pulse pressing assembly on the inner cavity of the diaphragm plate is detected by setting a second meter, which makes it easier for operators to understand the compression of solid particles by the diaphragm plate more intuitively; in addition, the pressure valve can be set to adjust the pressure effect of the pulse pressing assembly on the inner cavity of the diaphragm plate to ensure the compression effect of the diaphragm plate on solid particles at different stages.
[0018] According to one embodiment of this application, the filter press system further includes a filtrate tank, and the filter press includes a discharge channel communicating with a plurality of filtrate holes, the discharge channel being connected to the filtrate tank; the filter press system further includes a third meter and a fourth meter, both of which are electrically connected to the controller, and the third meter is used to detect the mass of the material to be filtered in the material tank, and the fourth meter is used to detect the mass of the filtrate in the filtrate tank; the controller is also used to adjust the pressure applied by the pulse pressing assembly to the inner cavity of the diaphragm plate according to the mass of the material to be filtered and the mass of the filtrate.
[0019] In this embodiment of the application, the mass change value of the material to be filtered can be determined by the mass of the material to be filtered detected by the third meter, and the mass change value of the filtrate can be determined by the mass of the filtrate detected by the fourth meter. Then, based on the mass change value of the material to be filtered and the mass change value of the filtrate, the mass of the solid particles remaining in the filter press can be determined. Then, combined with the average density of the solid particles, the filling rate of the solid particles in each filter chamber can be determined, that is, the filling rate of the filter cake in each filter chamber can be determined.
[0020] According to one embodiment of this application, the third metering device and the fourth metering device are both weighing sensors, and the material tank and the filtrate tank are respectively mounted on the third metering device and the fourth metering device.
[0021] According to one embodiment of this application, a drain pipe is provided between the drain channel and the filter tank, the fourth meter is a flow meter, and the fourth meter is located on the drain pipe.
[0022] According to one embodiment of this application, the plurality of pressure plates include filter plates and diaphragm plates, and the filter plates and the diaphragm plates are alternately stacked in the horizontal direction.
[0023] According to one embodiment of this application, the frame includes a limiting plate and a moving plate, and a plurality of the pressure plates are fixed between the limiting plate and the moving plate; the filter press further includes a driving mechanism, which is connected to the moving plate and is used to drive the moving plate to move toward the limiting plate.
[0024] In this embodiment of the application, the moving plate can be driven by the driving mechanism to move closer to the limiting plate, so that an interaction force is generated between the two adjacent pressure plates, thereby ensuring the sealing between the two adjacent pressure plates.
[0025] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0026] The above and other features and advantages of this application will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.
[0027] Figure 1 This is a schematic diagram of a filter press system according to an exemplary embodiment.
[0028] Figure 2 This is a schematic diagram of a structure of multiple pressure plates according to an exemplary embodiment.
[0029] Figure 3 This is a schematic diagram of a filter press according to an exemplary embodiment.
[0030] Figure 4 This is a schematic diagram of the structure of a filter plate according to an exemplary embodiment.
[0031] Figure 5 This is a schematic diagram of the structure of a diaphragm plate according to an exemplary embodiment.
[0032] The reference numerals in the attached figures are explained as follows: 100. Filter press system; 10. Material tank; 20. Filter press; 30. Drive pump; 40. Return pipeline; 50. Controller; 60. Pulse pressing assembly; 70. Filtrate tank; 80. Third metering device; 90. Fourth metering device; 11. Discharge port; 12. Return port; 13. Flushing pipeline; 14. First control valve; 15. Second control valve; 21. Frame; 22. Pressure plate; 23. Filter device; 24. Material flow channel; 25. Drive mechanism; 211. Limiting plate; 212. Moving plate; 221. Feed inlet; 222. Filtration inlet; 223. Feed port; 224. Reflux port; 225. Protrusion; 226. Filter plate; 227. Diaphragm plate; 228. Inner cavity; 229. Pressing port; 231. Filter chamber; 31. First measuring instrument; 41. Control valve; 61. Water tank; 62. Booster pump; 63. Booster pipeline; 64. Pressure relief pipeline; 65. Pressure relief valve; 66. Pulse generator; 67. Booster valve; 68. Second metering device; 71. Drainage pipeline. Detailed Implementation
[0033] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.
[0034] Figure 1 A schematic diagram illustrating the structure of a filter press system 100 provided in an embodiment of this application is shown. Figure 2 A schematic diagram illustrating a structure of multiple stacked pressure plates 22 provided in an embodiment of this application is illustrated. Figure 1 and Figure 2As shown, the filter press system 100 includes: a material tank 10, a filter press 20, a drive pump 30, a return pipeline 40, and a controller 50; the material tank 10 has a discharge port 11 and a return port 12, and is used to hold the material to be filtered; the filter press 20 includes a frame 21 and a plurality of pressure plates 22 stacked on the frame 21, and a filter device 23 located between each pair of adjacent pressure plates 22. Each pressure plate 22 is provided with a feed hole 221 and a filtrate hole 222. The feed holes 221 of the plurality of pressure plates 22 form a material flow channel 24, and the material flow channel 24 has a feed port 223 and a return port 224. The filter device 23 forms a filter chamber 2 that communicates with the material flow channel 24. 31, and the filter device 23 separates the filter chamber 231 and the filtrate hole 222; the drive pump 30 is connected to the discharge port 11 of the material tank 10 and the feed port 223 of the filter press 20 respectively. The drive pump 30 is used to draw the material to be filtered from the material tank 10 to the filter press 20, and a first metering device 31 is provided between the drive pump 30 and the filter press 20; the return pipeline 40 is connected to the return port 224 of the filter press 20 and the return port 12 of the material tank 10 respectively, and a regulating valve 41 is provided on the return pipeline 40; the controller 50 is electrically connected to the first metering device 31 and the regulating valve 41, and is used to adjust the opening degree of the regulating valve 41 according to the parameters detected by the first metering device 31.
[0035] In this embodiment, the material to be filtered in the material tank 10 can be pumped into the material flow channel 24 of the filter press 20 by the drive pump 30. Then, it enters the filter chamber 231 formed by the filter device 23 between each pair of adjacent pressure plates 22 through the feed hole 221 on each pressure plate 22. Solid-liquid separation is achieved by squeezing the material to be filtered in the filter chamber 231. That is, the filtrate in the material to be filtered passes through the filter device 23 and is discharged out through the filtrate hole 222 on the pressure plate 22, while the solid particles in the material to be filtered are retained in the filter chamber 231. The material is compressed into a filter cake within the filter press 21 to ensure the solid-liquid separation effect of the filter press 100. In addition, the parameters of the feed inlet 223 on the filter press 20 can be detected by the first metering device 31, and the regulating valve 41 can be controlled by the detected parameters. This enables the backflow control between the material flow channel 24 and the material tank 10, avoiding the situation where the material to be filtered is deposited and blocked due to the low air permeability of the filter device 23 in the filter chamber 231 and the low flow rate. This ensures the stability and continuity of the solid-liquid separation of the filter press 100.
[0036] The material tank 10 can be an open tank structure, in which case a discharge port 11 is provided near the bottom of the material tank 10, and the opening of the material tank 10 serves as a return port 12; or the material tank 10 can be a closed tank structure, such as a material tank 10 with a lid, in which case a discharge port 11 is provided near the bottom of the material tank 10, and a return port 12 is provided near the lid or on the lid. The drive pump 30 can be a diaphragm pump, centrifugal pump, plunger pump, etc.
[0037] The filter device 23 between two adjacent pressure plates 22 can be a filter cloth, etc., and the arrangement of the filter cloth on the pressure plates 22 is not limited, as long as it ensures that the filter cavity 231 formed by the filter cloth between the two adjacent pressure plates 22 is connected to the material channel formed by the feed hole 221, and that the filter cavity 231 is separated from the filtrate hole 222. For example, the filter device 23 is a filter cloth, and the mesh count of the filter cloth is greater than or equal to 1500, to ensure the filtration effect of the filter device 23 on the solid particles in the material to be filtered. For example, the mesh count of the filter cloth is 1500, 1600, 1700, 1800, 1900, 2000, etc.
[0038] The first metering device 31 is, but is not limited to, at least one of a flow meter and a pressure gauge; a pumping pipeline is provided between the drive pump 30 and the feed inlet 223 of the filter press 20, and the first metering device 31 is installed on the pumping pipeline. The first metering device 31 can be installed in the middle section of the pumping pipeline or at the end of the pumping pipeline near the filter press 20.
[0039] Taking the first metering device 31 as a flow meter as an example, when the flow rate detected by the first metering device 31 is too low or decreases abruptly, it indicates that the flow velocity of the material to be filtered entering the filter press 20 is low. At this time, the material to be filtered is prone to settling at the drive pump 30. Therefore, the opening of the regulating valve 41 can be increased to increase the backflow between the material flow channel 24 and the material tank 10. This reduces the pressure in the material flow channel 24 and reduces the resistance of the material to be filtered pumped into the filter press 20, thus increasing the flow velocity of the material to be filtered into the filter press 20. The flow rate is reduced or even avoided, and the sedimentation of the material to be filtered at the drive pump 30 is reduced. When the flow rate detected by the first metering device 31 is too large or suddenly increases, it indicates that the flow rate of the material to be filtered entering the filter press 20 is too large. At this time, there is not enough material to be filtered in the material flow channel 24. Therefore, the opening of the regulating valve 41 can be reduced (or even closed) to reduce the backflow between the material flow channel 24 and the material tank 10, thereby increasing the material to be filtered in the material flow channel 24 to ensure the separation effect of the material to be filtered in the filter chamber 231.
[0040] Taking the first metering device 31 as a pressure gauge as an example, when the pressure detected by the first metering device 31 is too low or decreases abruptly, it indicates that there is insufficient material to be filtered in the material flow channel 24. At this time, the opening of the regulating valve 41 can be reduced (or even closed) to reduce the backflow between the material flow channel 24 and the material tank 10, thereby increasing the material to be filtered in the material flow channel 24 to ensure the separation effect of the material to be filtered in the filter chamber 231. When the pressure detected by the first metering device 31 is too high or increases abruptly, it indicates that the resistance of the material to be filtered pumped into the filter press 20 is large. At this time, the material to be filtered is prone to sedimentation at the drive pump 30. Therefore, the opening of the regulating valve 41 can be increased to increase the backflow between the material flow channel 24 and the material tank 10. This reduces the resistance of the material to be filtered pumped into the filter press 20 on the basis of reducing the pressure in the material flow channel 24, that is, increases the flow rate of the material to be filtered into the filter press 20, and reduces or even avoids the sedimentation of the material to be filtered at the drive pump 30.
[0041] In this embodiment, the filter press 20 can be a plate and frame filter press structure, a diaphragm filter press structure, or a filter press structure combining plate and frame and diaphragm. In addition, the filter press 20 can be a horizontal filter press structure, that is, the multiple pressure plates 22 included in the filter press 20 are stacked in the horizontal direction to achieve mutual compression of the multiple pressure plates 22 in the horizontal direction.
[0042] When the filter press 20 is a plate and frame filter press structure, all the multiple pressure plates 22 included in the filter press 20 are filter plates 226; when the filter press 20 is a diaphragm filter press structure, all the multiple pressure plates 22 included in the filter press 20 are diaphragm plates 227; when the filter press 20 is a filter press structure combining plate and frame and diaphragm, the multiple pressure plates 22 included in the filter press 20 simultaneously include filter plates 226 and diaphragm plates 227.
[0043] The filter press 20 includes multiple pressure plates 22 that can be directly fixed to the frame 21 to ensure the sealing between adjacent pressure plates 22; or as... Figure 3 As shown, the frame 21 includes a limiting plate 211 and a moving plate 212. Multiple pressure plates 22 are fixed between the limiting plate 211 and the moving plate 212. The filter press 20 also includes a drive mechanism 25, which is connected to the moving plate 212 and drives the moving plate 212 to move closer to the limiting plate 211. Thus, after the multiple pressure plates 22 are sequentially stacked between the limiting plate 211 and the moving plate 212, the drive mechanism 25 can drive the moving plate 212 to move closer to the limiting plate 211, generating an interaction force between adjacent pressure plates 22, thereby ensuring the sealing between adjacent pressure plates 22.
[0044] In some implementations, such as Figure 1 or Figure 3As shown, the material flow channel 24 formed by the feed holes 221 on the multiple pressure plates 22 can be a straight flow channel in the horizontal direction.
[0045] In this way, the feed inlet 223 and return outlet 12 of the filter press 20 can be formed by the two ends of the straight flow channel. After the material to be filtered enters the material flow channel 24, the blockage of the material flow channel 24 due to the sedimentation of solid particles in the material to be filtered can be avoided, thereby ensuring the smooth flow between the discharge outlet 11 of the material flow channel 24 and the return outlet 12 of the material tank 10.
[0046] Among them, the multiple feed holes 221 forming a straight flow channel can be located at the middle position of the pressure plate 22 in the height direction, or the feed holes 221 can be located at a position slightly above the middle of the pressure plate 22 in the height direction, or they can be as follows: Figure 4 or Figure 5 As shown, the feed hole 221 is located at the top of the pressure plate 22 in the height direction.
[0047] Taking the feed hole 221 located at the top of the pressure plate 22 as an example, such as Figure 4 or Figure 5 As shown, the top of the pressure plate 22 has a protrusion 225, and the protrusion 225 has a feed hole 221 that extends through the thickness direction of the pressure plate 22. Thus, by providing the feed hole 221 on the protrusion 225 on the top of the pressure plate 22, after the material to be filtered enters the material flow channel 24 surrounded by multiple feed holes 221, the solid particles settling in the material to be filtered can directly settle into the multiple filter chambers 231, so as to avoid the cross-sectional area of the material flow channel 24 being compressed, thereby ensuring the smooth flow of the material to be filtered in the material flow channel 24.
[0048] In some implementations, such as Figure 1 and Figure 2 As shown, the plurality of pressure plates 22 include a diaphragm plate 227, the diaphragm plate 227 having an inner cavity 228 and a pressing port 229 communicating with the inner cavity 228; the filter press system 100 also includes a pulse pressing assembly 60, the pulse pressing assembly 60 communicating with the pressing port 229 of the diaphragm plate 227, and the controller 50 is also used to control the pulse pressing assembly 60 to intermittently pressurize the inner cavity 228 of the diaphragm plate 227.
[0049] In this way, the pulse pressing component 60 can intermittently pressurize the inner cavity 228 of the diaphragm plate 227, thereby pulse-pressing the material to be pressed in the filter chamber 231 through the diaphragm plate 227. This causes the solid particles in the filter chamber 231 to switch back and forth between being compressed (pressed by the diaphragm plate 227) and loose (not pressed by the diaphragm plate 227), so as to avoid large-diameter solid particles blocking the water filter holes on the filter device 23, while ensuring the pressing effect on the solid particles in the filter chamber 231, so as to reduce the moisture content of the filter cake composed of solid particles in the filter chamber 231.
[0050] The specific structure of the diaphragm plate 227 is not limited; the difference lies in the position of the feed hole 221 as described above. Furthermore, all the pressure plates 22 of the filter press 20 can be diaphragm plates 227, thus allowing the material to be filtered within the filter chamber 231 between adjacent diaphragm plates 227 to be compressed; or, as... Figure 2 As shown, the filter press 20 includes multiple pressure plates 22, including filter plates 226 and diaphragm plates 227. The filter plates 226 and diaphragm plates 227 are alternately stacked in the horizontal direction. In this way, the material to be filtered in the filter cavity 231 between the diaphragm plate 227 and the filter plate 226 adjacent to it can be squeezed.
[0051] The pulse pressing component 60 can be a gas pressing component, which means that the expansion and contraction of the inner cavity 228 of the diaphragm plate 227 are achieved by filling and releasing gas, thereby realizing the pulse pressing of solid particles; of course, the pulse pressing component 60 can also be a liquid pressing component, which means that the expansion and contraction of the inner cavity 228 of the diaphragm plate 227 are achieved by filling and reflux of liquid, thereby realizing the pulse pressing of solid particles.
[0052] In some implementations, such as Figure 1 As shown, the pulse pressing assembly 60 includes a water tank 61, a pressurizing pump 62, a pressurizing pipeline 63, a pressure relief pipeline 64, and a pressure relief valve 65. The pressurizing pump 62 is connected to the water tank 61, the pressurizing pipeline 63 is connected to the pressurizing pump 62 and the pressing port 229 of the diaphragm plate 227, and the pressure relief pipeline 64 is connected to the pressurizing pipeline 63 and the water tank 61. The pressure relief valve 65 is installed on the pressure relief pipeline 64 and is electrically connected to the controller 50. The controller 50 is used to control the intermittent opening or closing of the pressure relief valve 65.
[0053] Thus, when the pressurizing pump 62 pumps the fluid in the water tank 61 into the inner cavity 228 of the diaphragm plate 227 along the pressurizing pipeline 63, the inner cavity 228 can be pressurized by controlling the closing of the pressure relief valve 65, so that the solid particles in the filter chamber 231 are in a compressed state. And by controlling the opening of the pressure relief valve 65, the fluid in the pressurizing pipeline 63 can flow back to the water tank 61 along the pressure relief pipeline 64, thereby depressurizing the inner cavity 228 of the diaphragm plate 227, that is, shrinking the inner cavity 228, so that the solid particles in the filter chamber 231 are in a loose state.
[0054] The controller 50 can be directly electrically connected to the pressure relief valve 65 to control its opening or closing. Alternatively, it can be... Figure 1As shown, the pulse pressing assembly 60 also includes a pulse generator 66, which is electrically connected to both the pressure relief valve 65 and the controller 50. The pulse generator 66 receives the pressurization signal sent by the controller 50 and controls the pressure relief valve 65 to open or close based on the pressurization signal. Thus, by using the pulse generator 66, the opening and closing of the pressure relief valve 65 can be controlled, simplifying the pulse control of the pulse pressing assembly 60 and improving the efficiency of controlling the intermittent opening and closing of the pressure relief valve 65.
[0055] In some implementations, such as Figure 1 As shown, the pulse pressing assembly 60 also includes a pressure valve 67 and a second meter 68; both the pressure valve 67 and the second meter 68 are installed on the pressure pipeline 63 and are electrically connected to the controller 50. The controller 50 is used to adjust the opening degree of the pressure valve 67 according to the parameters detected by the second meter 68 when the pressure valve 67 is opened.
[0056] Thus, by setting the second metering device 68, the pressurization effect of the pulse pressing assembly 60 on the inner cavity 228 of the diaphragm plate 227 can be detected, making it easier for operators to understand more intuitively the compression of solid particles by the diaphragm plate 227; in addition, by setting the pressure valve 67, the pressurization effect of the pulse pressing assembly 60 on the inner cavity 228 of the diaphragm plate 227 can be adjusted to ensure the compression effect of the diaphragm plate 227 on solid particles at different stages.
[0057] The second measuring instrument 68 can be a pressure gauge. In this case, the pressure intensity of the pulse pressing assembly 60 on the inner cavity 228 of the diaphragm plate 227 can be determined more directly based on the parameters detected by the second measuring instrument 68.
[0058] Specifically, during the filtration process of the material to be filtered, the larger the volume of the filter cake in the filter chamber 231, the stronger its resistance to compression. Therefore, during the filtration process, the pressure applied by the pulse pressing assembly 60 to the inner cavity 228 of the isolation plate can be gradually increased to ensure the compression effect on the filter cake in the filter chamber 231 and reduce the moisture content in the filter cake. For example, the pressure applied by the pulse pressing assembly 60 to the inner cavity 228 of the isolation plate can be gradually increased according to the filtration time of the material to be filtered by the filter press 20; or the pressure applied by the pulse pressing assembly 60 to the inner cavity 228 of the isolation plate can be gradually increased according to the filter cake filling rate in the filter chamber 231.
[0059] Taking the filter cake filling rate in the filter chamber 231 as an example, when the filter cake filling rate is 20%-30%, a low-pressure pulse is used to pressurize the inner cavity 228 of the diaphragm plate 227. For example, the pressure during pressurization can be 0.3-0.4 MPa, the pressurization frequency is 15-20 seconds / time, and the duration is 2-3 minutes. When the filter cake filling rate is 40%-60%, a low-to-medium pressure pulse is used to pressurize the inner cavity 228 of the diaphragm plate 227. For example, the pressure during pressurization can be 0.7-0.8 MPa, the pressurization frequency is 15-20 seconds / time, and the duration is 2-3 minutes. 5 minutes; when the filter cake is 80%-90% full, pressurize the inner cavity 228 of the diaphragm plate 227 with a high-pressure pulse to destroy the initially formed bottom capillary layer. For example, the pressure during pressurization can be 1.0-1.2 MPa, the pressurization frequency is 15-20 seconds / time, and the duration is 4-5 minutes.
[0060] In some implementations, such as Figure 1 As shown, the filter press system 100 also includes a filtrate tank 70, and the filter press 20 includes a discharge channel (not shown in the figure) communicating with multiple filtrate holes 222. The discharge channel is connected to the filtrate tank 70. The filter press system 100 also includes a third meter 80 and a fourth meter 90. Both the third meter 80 and the fourth meter 90 are electrically connected to the controller 50. The third meter 80 is used to detect the mass of the material to be filtered in the material tank 10, and the fourth meter 90 is used to detect the mass of the filtrate in the filtrate tank 70. The controller 50 is also used to adjust the pressure applied by the pulse pressing assembly 60 to the inner cavity 228 of the diaphragm plate 227 according to the mass of the material to be filtered and the mass of the filtrate.
[0061] Thus, the mass change value of the material to be filtered can be determined by the mass of the material to be filtered detected by the third meter 80, and the mass change value of the filtrate can be determined by the mass of the filtrate detected by the fourth meter 90. Then, based on the mass change value of the material to be filtered and the mass change value of the filtrate, the mass of the solid particles remaining in the filter press 20 can be determined. Then, combined with the average density of the solid particles, the filling rate of the solid particles in each filter chamber 231 can be determined, that is, the filling rate of the filter cake in each filter chamber 231 can be determined.
[0062] Among them, such as Figure 1 As shown, both the third measuring device 80 and the fourth measuring device 90 are load cells, and the material tank 10 and the filtrate tank 70 are respectively mounted on the third measuring device 80 and the fourth measuring device 90. In this way, the mass of the material to be filtered in the material tank 10 and the mass of the filtrate in the filtrate tank 70 can be directly detected by the third measuring device 80 and the fourth measuring device 90, respectively.
[0063] Of course, the third metering device 80 can also be a flow meter, and the third metering device 80 is installed on the pipeline between the material tank 10 and the drive pump 30; in this way, the flow rate of the material to be filtered can be detected by the third metering device 80, and then the mass of the material to be filtered can be determined by combining the density of the material to be filtered (the material to be filtered in the material tank 10 is a uniformly stirred material). In addition, as Figure 1 As shown, a drain pipe 71 is provided between the drain channel (not shown in the figure) and the filter tank 70. The fourth meter 90 is a flow sensor and is installed on the drain pipe 71. In this way, the flow rate of the filtrate can be detected by the fourth meter 90, and then the mass of the filtrate can be determined by combining the density of the filtrate.
[0064] In some implementations, such as Figure 1 As shown, the filter press system 100 also includes a flushing pipeline 13. One end of the flushing pipeline 13 is connected between the material tank 10 and the drive pump 30. A first control valve 14 is provided on the flushing pipeline 13, and a second control valve 15 is provided at the outlet of the material tank 10.
[0065] Thus, when the filter press system 100 performs solid-liquid separation on the material to be filtered, the first control valve 14 can be closed while the second control valve 15 is opened to ensure that the drive pump 30 can draw the material to be filtered from the material tank 10 to the filter press 20. After the solid-liquid separation of the material to be filtered is completed, the first control valve 14 can be opened while the second control valve 15 is closed to ensure that the drive pump 30 can draw the cleaning liquid (such as pure water) along the flushing pipeline 13 to the filter press 20, so as to flush the material flow channel 24, filter chamber 231, etc., and extend the service life of the filter press system 100.
[0066] The first control valve 14 and the second control valve 15 may have the same or different structures. Taking the first control valve 14 as an example, it can be a manual control valve or an electric control valve. When the first control valve 14 is an electric control valve, it is electrically connected to the controller 50 to improve the automation effect of the filter press system 100.
[0067] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium; "fix" can be a non-detachable fixation or a detachable fixation (such as non-destructive or destructive disassembly). Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.
[0068] In the description of the embodiments of this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0069] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the implementation of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0070] The above are merely preferred embodiments of the implementation methods of this application and are not intended to limit the implementation methods of this application. For those skilled in the art, various modifications and variations can be made to the implementation methods of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the implementation methods of this application should be included within the protection scope of the implementation methods of this application.
Claims
1. A pressure filtration system (100), characterized in that, include: The material tank (10) has a discharge port (11) and a return port (12) and is used to hold the material to be pressed and filtered; A filter press (20) includes a frame (21) and a plurality of pressure plates (22) stacked on the frame (21), and a filter device (23) located between each pair of adjacent pressure plates (22). Each pressure plate (22) is provided with a feed hole (221) and a filtrate hole (222). The feed holes (221) of the plurality of pressure plates (22) form a material flow channel (24), and the material flow channel (24) has a feed inlet (223) and a return outlet (224). The filter device (23) forms a filter chamber (231) communicating with the material flow channel (24), and the filter device (23) separates the filter chamber (231) and the filtrate hole (222). A drive pump (30) is connected to the outlet (11) of the material tank (10) and the inlet (223) of the filter press (20), respectively. The drive pump (30) is used to draw the material to be filtered from the material tank (10) to the filter press (20), and a first metering device (31) is provided between the drive pump (30) and the filter press (20). The return pipeline (40) is connected to the return port (224) of the filter press (20) and the return port (12) of the material tank (10), and a regulating valve (41) is provided on the return pipeline (40). The controller (50) is electrically connected to the first meter (31) and the regulating valve (41), and is used to adjust the opening of the regulating valve (41) according to the parameters detected by the first meter (31).
2. The filter press system as described in claim 1, characterized in that, The material flow channel (24) is a straight flow channel along the horizontal direction.
3. The filter press system as described in claim 2, characterized in that, The top of the pressure plate (22) has a protrusion (225) and the protrusion (225) has a feed hole (221) that extends through the thickness direction of the pressure plate (22).
4. The filter press system as described in claim 1, characterized in that, The plurality of pressure plates (22) include a diaphragm plate (227) having an inner cavity (228) and a pressing port (229) communicating with the inner cavity (228). The filter press system (100) further includes a pulse pressing assembly (60), which is connected to the pressing port (229) of the diaphragm plate (227). The controller (50) is also used to control the pulse pressing assembly (60) to intermittently pressurize the inner cavity (228) of the diaphragm plate (227).
5. The filter press system as described in claim 4, characterized in that, The pulse pressing assembly (60) includes a water tank (61), a pressurizing pump (62), a pressurizing pipeline (63), a pressure relief pipeline (64), and a pressure relief valve (65). The pressurizing pump (62) is connected to the water tank (61), the pressurizing pipeline (63) is connected to the pressurizing pump (62) and the pressing port (229) of the diaphragm plate (227) respectively, and the pressure relief pipeline (64) is connected to the pressurizing pipeline (63) and the water tank (61) respectively; The pressure relief valve (65) is installed on the pressure relief pipeline (64) and is electrically connected to the controller (50). The controller (50) is used to control the pressure relief valve (65) to open or close intermittently.
6. The filter press system as described in claim 5, characterized in that, The pulse pressing assembly (60) further includes a pulse generator (66), which is electrically connected to the pressure relief valve (65) and the controller (50) respectively; The pulse generator (66) is used to receive the pressurization signal sent by the controller (50) and control the pressure relief valve (65) to open or close based on the pressurization signal.
7. The filter press system as described in claim 5, characterized in that, The pulse pressing assembly (60) also includes a pressure valve (67) and a second meter (68). The pressurizing valve (67) and the second meter (68) are both installed on the pressurizing pipeline (63) and are electrically connected to the controller (50). The controller (50) is used to adjust the opening degree of the pressurizing valve (67) according to the parameters detected by the second meter (68) when the pressurizing valve (67) is opened.
8. The filter press system as described in claim 4, characterized in that, The filter press system (100) further includes a filtrate tank (70), and the filter press (20) includes a drain channel communicating with a plurality of the filtrate holes (222), the drain channel being connected to the filtrate tank (70); The filter press system (100) also includes a third meter (80) and a fourth meter (90). The third meter (80) and the fourth meter (90) are both electrically connected to the controller (50). The third meter (80) is used to detect the mass of the material to be filtered in the material tank (10), and the fourth meter (90) is used to detect the mass of the filtrate in the filtrate tank (70). The controller (50) is also used to adjust the pressure applied by the pulse pressing assembly (60) to the inner cavity (228) of the diaphragm plate (227) according to the mass of the material to be pressed and the mass of the filtrate.
9. The filter press system as described in claim 8, characterized in that, The third meter (80) and the fourth meter (90) are both weighing sensors, and the material tank (10) and the filtrate tank (70) are respectively mounted on the third meter (80) and the fourth meter (90).
10. The filter press system as described in claim 8, characterized in that, A drain pipe (71) is provided between the drain channel and the filter tank (70). The fourth meter (90) is a flow meter and is located on the drain pipe (71).
11. The filter press system as described in claim 4, characterized in that, The plurality of pressure plates (22) include filter plates (226) and diaphragm plates (227), wherein the filter plates (226) and the diaphragm plates (227) are alternately stacked in the horizontal direction.
12. The filter press system according to any one of claims 1-11, characterized in that, The frame (21) includes a limiting plate (211) and a moving plate (212), and a plurality of the pressure plates (22) are fixed between the limiting plate (211) and the moving plate (212); The filter press (20) further includes a drive mechanism (25), which is connected to the moving plate (212) and is used to drive the moving plate (212) to move closer to the limiting plate (211).