Circulating filter belt type solid-liquid separator suitable for large-flow solid-liquid mixture

Abstract

The circulating filter belt type solid-liquid separator is characterized in that a liquid outlet is formed in the bottom of a water receiving tank, parallel filter conveying frames are fixed to the positions, located in the range of the two opposite sides, of the top of the water receiving tank respectively, and the two ends of each filter conveying frame are in transmission connection with filter conveying belts through transmission rollers respectively; a mixture guiding device is arranged above the conveying starting end of the filtering conveying belt and provided with a communication opening, the bottoms of the two sides of the mixture guiding device make contact with the filtering conveying belt, the conveying tail end of the filtering conveying belt extends out of the water receiving tank, a scraper is arranged at the conveying tail end of the filtering conveying belt, and at least one transmission roller is in driving connection through a driving motor. According to the circulating filter belt type solid-liquid separator suitable for the large-flow solid-liquid mixture, the mixture falls on the filter conveyor belt through the mixture guide device, the mixture is filtered while being conveyed by the filter conveyor belt, the filtered liquid drops into the water receiving tank, and the residual solid on the filter conveyor belt is scraped off through the scraper.

Description

Technical Field

[0001] This invention relates to the technical field of solid-liquid mixture filtration, and more specifically to a circulating belt filter solid-liquid separator suitable for large flow rates of solid-liquid mixtures. Background Technology

[0002] In some large food processing enterprises, due to the long cooking time of their materials, to ensure the cooking effect, they generally do not choose material processing tanks with unlimited larger volumes. Instead, they choose multiple material processing tanks for cooking and processing separately. This selection allows multiple tanks to process simultaneously, thereby processing more food per unit time. Furthermore, by controlling the loading and unloading times of different material processing tanks, operators can handle loading and unloading of different tanks at different times. This avoids situations where operators need to handle multiple tanks simultaneously, leading to excessive labor intensity, or where no loading or unloading is required, resulting in low operator utilization during those periods.

[0003] In this production mode, when there are a large number of material handling tanks, the operators' working time can be fully utilized without excessive workload in any given period. The process is as follows: after one material handling tank completes loading and unloading and starts operation, another tank needs to be loaded and unloaded shortly after, or even immediately. Similarly, after the last tank completes loading and unloading and starts operation, the loading and unloading of the first tank needs to be performed again shortly after, or even immediately. However, to further improve production efficiency, the loading and unloading time needs to be shortened. The loading and unloading operations include operators adding solid materials to the material handling tanks, adding liquid materials through the filling pipe, removing solid materials from the tanks, and draining the liquid materials mixed with a small amount of solid materials through the drain pipe, which then transports them to subsequent processing equipment. Because the tanks contain a large amount of liquid, a high draining speed is required to ensure a large volume of liquid drained per unit time. In the aforementioned process, the reduction in time required for loading and unloading by operators is relatively limited. The time for adding liquid to the material processing tank is related to the liquid addition speed of the filling pipe, which is dependent on the water supply company and cannot be increased independently. Although the drainage speed is designed during the equipment and pipeline design, some solid material inevitably softens and scatters in the drained liquid due to the cooking process. In addition, the drainage pipeline from the material processing tank to the subsequent processing equipment is relatively long. Therefore, after a period of use, the drainage pipeline will be affected by the residual solid material in the pipeline, which will affect the efficiency of the drainage pipeline. This will increase the drainage time of the material processing tank, not only reducing the loading and unloading efficiency, but also making it impossible to match the loading and unloading time with the designed production rhythm. This will increase the labor intensity of operators per unit time, so the production rhythm must be slowed down, which will lead to a decrease in production efficiency or an increase in the number of operators, resulting in an increase in production costs.

[0004] To solve the above problems, the existing technology adopts a method of connecting a filter tank after the drain pipes of each material processing tank are connected to the main drain pipe. The filter device in the filter tank filters out the solid materials contained in the drain of each material processing tank. Then, the filtered liquid is transported to the subsequent processing equipment through the main drain pipe for processing. This can ensure the draining speed of each processing tank.

[0005] However, this method still has problems. The filtration structure in these tank-type filters is located inside the tank. This structure needs to be cleaned periodically to maintain filtration effectiveness; otherwise, over time, it will affect the filtration efficiency, as well as the drainage efficiency of the main drain pipe. Cleaning the filter structure requires preventing the tank from being drained again and necessitates opening the tank to clean it. This is not only cumbersome but also disrupts normal production. To avoid impacting production, companies would need at least two filter tanks. Even then, this increases production costs, and operators must regularly clean the filter structures, increasing their workload. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a circulating belt filter solid-liquid separator suitable for large-flow solid-liquid mixtures. The mixture falls evenly over a large area onto the filter conveyor belt below the cover through the action of the mixture guiding device. As the mixture is conveyed by the filter conveyor belt, it has sufficient time to filter downwards. The filtered liquid drips into the water receiving tank, and the solid material remaining on the filter conveyor belt is scraped off by a scraper so that the mixture can be effectively filtered again when the filter conveyor belt is conveyed to the cover again.

[0007] The technical solution adopted in this invention is: A circulating belt filter solid-liquid separator suitable for large-flow solid-liquid mixtures includes a top-open water receiving tank with a drain port at the bottom connected to a drain pipe. Parallel filter conveyor frames are fixedly connected to the top of the water receiving tank on both opposite sides. A ring-shaped filter conveyor belt for filtering the solid-liquid mixture is connected to both ends of the filter conveyor frame via drive rollers. A mixture guiding device is fixed above the beginning of the filter conveyor belt on the filter conveyor frame. The mixture guiding device has a connecting port for connecting to the mixture pipe. The bottom edges of both sides of the mixture guiding device contact the top surface of the filter conveyor belt. One end of the filter conveyor frame at the end of the filter conveyor belt extends beyond the corresponding end of the water receiving tank. A scraper for scraping off solid material from the outer surface of the filter conveyor belt is also provided at the end of the filter conveyor frame at the end of the filter conveyor belt. At least one drive roller is connected via a drive motor.

[0008] A further improvement of the present invention is that the mixing material guiding device includes a cover with an open bottom. The connecting port is located at one end of the cover corresponding to the starting position of the filter conveyor belt. The end of the cover away from the connecting port is located in the middle of the filter conveyor frame. The extension direction of the side cover facing the filter conveyor frame is parallel to the conveying direction of the filter conveyor belt, and the width between the side cover walls decreases from top to bottom. An extended baffle is fixed to the bottom edge of the side cover wall, and the bottom edge of the extended baffle contacts the top surface of the filter conveyor belt. The inner edge of the cover extends away from the connecting port. The cover is provided with a guide ring, a distribution grid, a leveling plate, and a pressure plate in sequence. The top of the guide ring is fixedly connected to the top of the cover and is coaxially arranged with the connecting opening. The top of the distribution grid is fixedly connected to the top of the cover and its two sides are fixedly connected to the corresponding side walls of the cover. The two ends of the leveling plate are fixedly connected to the side walls of the cover. The pressure plate is inclined from top to bottom away from the connecting opening. The top edge of the pressure plate is fixedly connected to the top of the cover, the bottom edge is fixedly connected to the end wall away from the connecting opening, and the two sides are fixedly connected to the corresponding side walls.

[0009] A further improvement of the present invention is that the guide ring includes a connecting block fixed to the top of the cover. The connecting block has a through hole coaxially arranged with the communication port. At least one through ring is coaxially fixed in the through hole by radial rods evenly distributed along the direction from the axis to the edge. The outermost through ring and the inner wall of the through hole and the two adjacent through rings form annular through holes respectively. The through ring closest to the axis forms a central through hole. The inner diameter and the ring width of the annular through holes increase in the direction away from the communication port respectively. The inner diameter of the central through hole increases or remains unchanged in the direction away from the communication port. The inner diameter of the through hole facing the communication port is larger than the inner diameter of the through hole.

[0010] A further improvement of the present invention is that the material distribution grid includes a material distribution grid A and a material distribution grid B arranged sequentially along the direction away from the communication opening. The surface of the material distribution grid A is arranged perpendicular to the axis of the communication opening, and the distance between the surfaces of the material distribution grid B and the material distribution grid A increases from top to bottom.

[0011] A further improvement of the present invention is that the material distribution horizontal plate is provided in multiple groups along the direction away from the connecting opening, and each group of material distribution horizontal plates is provided with multiple plates at equal intervals along the direction perpendicular to the axis of the connecting opening, and the material distribution horizontal plate is inclined along the direction away from the connecting opening towards the top of the cover.

[0012] A further improvement of the present invention is that the surface of the pressure plate is a convex arc surface that protrudes towards the lower part of the end cover wall at the end where the communication port is located.

[0013] A further improvement of the present invention is that a water-receiving filter media tray is fixedly connected within the area enclosed by the transmission rollers and filter conveyor belts at both ends between the filter conveyor frames. The base of the water-receiving filter media tray is inclined downward along the direction from one side of the filter conveyor frame to the other side. A water-blocking upright plate A is provided upward along the top edge of the base, and water-blocking upright plates B are provided upward along the two side edges of the base. The two sides of the water-blocking upright plate A are respectively sealed and fixedly connected to the corresponding ends of the water-blocking upright plate B on the same side. The top surface of the base and the area enclosed by the water-blocking upright plates A and B are further improved. A filter plate is fixedly placed inside. The filter plate is inclined downward along the direction facing the water-blocking upright A. The position of the filter plate away from the water-blocking upright A is lower than the top of the corresponding position of the water-blocking upright B. The position of the filter plate facing the water-blocking upright A is lower than the top of the water-blocking upright A. The bottom surface of the chassis is fixedly connected to the connecting crossbar provided between the filter conveying frame and the filter conveying frame. The filter conveying frame on the lower side edge of the chassis has a strip-shaped through hole along the extension direction of the filter conveying frame at the position between the water-blocking upright B. The top edge of the strip-shaped through hole is located above the side edge of the chassis.

[0014] A further improvement of the present invention is that the water-blocking upright plate A is attached to the filter conveyor frame on the same side, the edge of the chassis away from the water-blocking upright plate A extends to the position of the filter conveyor frame on the same side, and leaves a gap for dripping water, the water-blocking upright plate B near the beginning of the filter conveyor belt is located below the connecting port, and the water-blocking upright plate B near the end of the filter conveyor belt is located on the side wall of the water receiving tank.

[0015] A further improvement of the present invention is that multiple supporting uprights are evenly distributed at intervals along the extension direction parallel to the water-retaining upright A at the position between the water-retaining uprights B on the top surface of the chassis. The supporting uprights are respectively set perpendicular to the water-retaining uprights A. When the water receiving filter media tray is fixedly connected to the fixed filter conveyor frame through the connecting crossbeam, all the supporting uprights are vertical. The top edge of the supporting uprights is inclined downward along the direction facing the water-retaining upright A, and the top edges of the supporting uprights are located in the same plane. The filter plate is placed and fixed on the top surface of the supporting uprights.

[0016] A further improvement of the present invention is that multiple backwashing spray horizontal pipes are fixedly connected between the filter conveyor frames and below the base of the water receiving filter media tray. The two ends of the backwashing spray horizontal pipes are respectively fixedly connected to the filter conveyor frames. Multiple downward spray nozzles are provided at equal intervals along the extension direction of the backwashing spray horizontal pipes on the bottom side wall. The same end of the backwashing spray horizontal pipes extends outward from the filter conveyor frames and is connected in parallel to the spray main pipe joint through spray branch pipes. The spray branch pipes and the spray main pipe joint are respectively fixedly connected to the filter conveyor frames on their respective sides. The spray main pipe joint is connected to a pressurized flushing liquid supply pipe.

[0017] The beneficial effects of this invention are as follows: First, the circulating belt filter solid-liquid separator of this application, applicable to large-flow solid-liquid mixtures, allows the mixture to fall evenly over a large area onto the filter conveyor belt below the cover through the action of the mixture guiding device. As the mixture is conveyed by the filter conveyor belt, it has sufficient time to filter downwards. The filtered liquid drips into the water receiving tank, and the solid material remaining on the filter conveyor belt is scraped off by a scraper so that the mixture can be effectively filtered again when the filter conveyor belt is conveyed to the cover again.

[0018] Secondly, the circulating belt filter solid-liquid separator of this application, applicable to large flow solid-liquid mixtures, has a mixture guiding device located at the beginning of the filter conveyor belt, and a connection port between the cover and the mixture pipe located at the beginning of the filter conveyor belt. This ensures that the mixture falls from the cover of the mixture guiding device onto the filter conveyor belt as close as possible to the beginning of the filter conveyor belt, thereby maximizing the filtration time of the mixture on the filter conveyor belt.

[0019] Third, the circulating belt filter solid-liquid separator of this application, which is suitable for large flow solid-liquid mixtures, has a side wall structure of the cover and an extended baffle plate at its bottom edge. This allows the mixture that falls onto the filter conveyor belt after passing through the cover to maintain a certain distance from the side edge of the filter conveyor belt. This prevents the mixture from spreading to the sides of the filter conveyor belt, which would otherwise cause the mixture on both sides of the filter conveyor belt to be too close to the edge of the filter conveyor belt, resulting in a limited filtration area and affecting the filtration effect.

[0020] Fourth, the circulating belt filter solid-liquid separator of this application, applicable to large-flow solid-liquid mixtures, through the guide ring, distribution grid, equalizing plate and pressure plate arranged sequentially inside the cover, enables the mixture sprayed into the cover to fall evenly within the area covered by the cover and the filter conveyor belt. This ensures that the amount of mixture dripping from each position of the filter conveyor belt within the cover area is relatively uniform, thereby ensuring that the filtration effect of the mixture at each position of the filter conveyor belt is relatively consistent. Moreover, it can also effectively reduce the impact of the mixture sprayed from the connecting port on the cover.

[0021] Fifth, the circulating filter belt solid-liquid separator of this application, applicable to large flow solid-liquid mixtures, through the structural design of the guide ring, enables the mixture sprayed from the connecting port to be directly, quickly, and uniformly dispersed and sprayed, thereby effectively expanding the flow trajectory range of the mixture within the cover. Moreover, the dispersed mixture is more conducive to the dispersion of solid and liquid materials, thus facilitating subsequent filtration. Furthermore, it can effectively reduce the flow velocity of the mixture corresponding to the axial direction of the connecting port, effectively reducing the impact force of the mixture.

[0022] Sixth, the circulating belt filter solid-liquid separator of this application, applicable to large flow solid-liquid mixtures, further reduces the direct impact of the mixture on the guide ring by changing the ring width of the feed ring and the width of the radial rod, thereby reducing the upper limit of the pressure of the guide ring, extending the service life of the guide ring, and enabling the mixture to effectively achieve the setting effect of the guide ring.

[0023] Seventh, the circulating belt filter solid-liquid separator of this application, which is suitable for large flow solid-liquid mixtures, can minimize the structural size of the connecting block by setting the size and structure of the connecting block, thereby further reducing the influence of the guide ring on the mixture sprayed from the connecting port, and further improving the dispersion effect and axial deceleration effect of the mixture after passing through the guide ring.

[0024] Eighth, the circulating belt filter solid-liquid separator of this application, applicable to large flow solid-liquid mixtures, through the action of distribution grid A and distribution grid B, enables the mixture dispersed by the guide ring to be completely dispersed to fill the cover cross section after passing through distribution grid A and distribution grid B, which further facilitates the subsequent filtration of the mixture. Moreover, it repeatedly reduces the axial velocity of the mixture corresponding to the connecting port, reduces the impact force of the mixture on other parts of the cover, and extends the service life.

[0025] Ninth, the circulating belt filter solid-liquid separator of this application, applicable to large flow solid-liquid mixtures, reduces the direct impact of the mixture on the distribution grids A and B by setting the thickness of the vertical plate A and horizontal plate A of the distribution grid A and the vertical plate B and horizontal plate B of the distribution grid B, thereby reducing the pressure limit of the distribution grids A and B, extending the service life of the distribution grids, and enabling the mixture to effectively achieve the setting effect of the distribution grids.

[0026] Tenth, in the circulating belt filter solid-liquid separator applicable to large flow solid-liquid mixtures of this application, the distance between two adjacent vertical plates B is less than or equal to the distance between two adjacent vertical plates A, and the distance between two adjacent horizontal plates B is less than or equal to the distance between two adjacent horizontal plates A, so that the distribution grid B can further disperse the mixture after passing through the distribution grid A.

[0027] Eleventh, the circulating belt filter solid-liquid separator of this application, which is applicable to large flow solid-liquid mixtures, has the angle relationship between the top and bottom surfaces of the horizontal plate A and the connecting port, and the angle relationship between the bottom and top surfaces of the horizontal plate B and the connecting port, so that the mixture can still play a role in dispersing the mixture during the process of passing through the distribution grid A or the distribution grid B.

[0028] Twelfth, the circulating belt filter solid-liquid separator of this application, applicable to large-flow solid-liquid mixtures, has the following characteristics: the angles between the top surfaces of horizontal plate A and horizontal plate B relative to the connecting port, and the angles between the bottom surfaces of horizontal plate A and horizontal plate B relative to the connecting port, cause the distribution grid A to disperse the mixture upwards and convert the kinetic energy corresponding to the axis of the connecting port into potential energy. In addition, the distribution grid B converts the kinetic energy corresponding to the axis of the connecting port into kinetic energy in the downward direction. This not only increases the speed and impact force of the mixture on the filter conveyor belt, but also facilitates the effective filtration of the filter conveyor belt.

[0029] Thirteenth, the circulating belt filter solid-liquid separator of this application, applicable to large flow solid-liquid mixtures, disperses the mixtures with different heights, moving speeds and moving directions relative to the cover after passing through the distribution grid B multiple times by distributing the material distribution horizontal plates and setting the material distribution horizontal plates at an inclination. Most of the mixtures have their axial speed reduced along the connecting port, which effectively enables most of the mixtures to fall onto the filter conveyor belt in this area.

[0030] Fourteenth, the circulating belt filter solid-liquid separator of this application, applicable to large flow solid-liquid mixtures, uses the convex arc surface structure of the pressure plate to facilitate the downward flow and dripping of some of the mixture, as well as the downward splashing of some of the mixture. Moreover, the angle between the bottom of the convex arc surface and the horizontal plane gradually decreases along the direction away from the connection port until it approaches horizontal. This structural design can prevent the mixture flowing along the plate surface to the bottom from accumulating in one place and falling in a concentrated manner, thus affecting the uniformity of the mixture falling.

[0031] Fifteenth, in the circulating belt filter solid-liquid separator of this application applicable to large flow solid-liquid mixtures, the bottom edge of the side cover wall is lower than the bottom edge of the end cover wall, so that some of the mixture can fly out between the bottom edge of the end cover wall away from the connection port and the filter conveyor belt, avoiding some of the mixture from falling to the end cover wall away from the connection port and affecting the uniformity of the mixture falling.

[0032] Sixteenth, the circulating belt filter solid-liquid separator of this application, which is suitable for large flow solid-liquid mixtures, has two ends of the top crossbeam of the cover fixedly connected to the connecting rod through strip-shaped connecting holes A, so that the distance between the cover and the filter conveyor belt can be adjusted according to the pressure of the solid-liquid mixture in the mixing pipe, and the bottom edge of the extended baffle plate fixed to the bottom of the side cover wall can always be in contact with the filter conveyor belt through the fixing clamp.

[0033] Seventeenth, the circulating belt filter solid-liquid separator of this application, applicable to large flow solid-liquid mixtures, fixes the "L"-shaped connecting rods at both ends of the scraper to the fixed frame through the strip connecting hole B, so as to adjust the tightness between the scraper and the filter conveyor belt according to the material of the filter conveyor belt and the specific solid material in the solid-liquid mixture.

[0034] Eighteenth, the circulating belt filter solid-liquid separator of this application, applicable to large flow solid-liquid mixtures, can filter a small amount of small-sized solid material in the liquid material filtered by the filter conveyor belt again through the action of the water receiving filter media plate, so that the liquid material can avoid the filter conveyor belt below and fall directly into the water receiving tank.

[0035] Nineteenth, the circulating belt filter solid-liquid separator of this application, applicable to large flow solid-liquid mixtures, by tilting the base of the water receiving filter media tray and tilting the filter plate, causes the liquid material to be filtered by the filter conveyor belt to first flow along the tilt direction of the filter plate and be filtered while flowing, and then flow along the tilt direction of the base and be filtered again when passing through the filter vertical plate and the filter soft plate before finally dripping into the water receiving tank.

[0036] Twentieth, the circulating belt filter solid-liquid separator of this application, which is suitable for large flow solid-liquid mixtures, can ensure that the filter plate is in contact with the chassis through the filter plate, so as to prevent the liquid material flowing along the chassis from falling directly into the water tank without being filtered, thereby maximizing the filtration effect of the solid material in the liquid material.

[0037] 21. The circulating belt filter solid-liquid separator of this application, which is suitable for large flow solid-liquid mixtures, facilitates the separation and removal of the filter plate from the water receiving filter plate for cleaning through the connection method of the filter plate and the chassis and the strip-shaped through holes set in the filter conveyor frame, and also facilitates the direct cleaning of the water receiving filter plate.

[0038] 22. The circulating belt filter type solid-liquid separator of this application, which is applicable to large flow solid-liquid mixtures, has a filter conveyor frame whose top is higher than the top surface of the filter conveyor belt, and the end face of the filter conveyor frame facing the filter conveyor belt is provided with a sealing panel that fits tightly against the side edge of the filter conveyor belt, thereby preventing the mixture on the filter conveyor belt from escaping from both sides of the filter conveyor belt and falling into the water receiving tank without being filtered.

[0039] Twenty-third, the circulating belt filter solid-liquid separator of this application, applicable to large flow solid-liquid mixtures, has multiple backwash spray horizontal pipes fixed between the filter conveyor frames and below the base of the water receiving filter media tray. This allows the filter conveyor belt, after passing through the scraper, to be sprayed through the backwash spray horizontal pipes, spraying the solid material remaining on the filter conveyor belt after being scraped off by the scraper into the water receiving tank. This residual solid material entering the water receiving tank will not affect the subsequent treatment of the liquid material, and can also wash the filter conveyor belt. After being washed, the filter conveyor belt can be used again to filter and convey the solid-liquid mixture that falls onto the filter conveyor belt after it is back under the conveyor belt cover.

[0040] Twenty-fourth, the circulating belt filter solid-liquid separator of this application, which is suitable for large flow solid-liquid mixtures, improves the rinsing effect on the filter conveyor belt by setting the nozzles of the backwash spray horizontal pipe.

[0041] Twenty-fifth, in the circulating belt filter solid-liquid separator of this application applicable to large flow solid-liquid mixtures, the nozzles on the opposite sides of two adjacent backwash spray horizontal pipes are located on the same horizontal line when spraying onto the filter conveyor belt, thereby further improving the rinsing effect.

[0042] 26. In the circulating belt filter solid-liquid separator of this application applicable to large-flow solid-liquid mixtures, the angle between the spray direction of the nozzle spraying towards the conveyor belt and the horizontal plane is less than or equal to the angle between the spray direction of the nozzle spraying away from the conveyor belt and the horizontal plane. The smaller angle allows the tangential force generated by the flushing water sprayed towards the conveyor belt to separate the residual solid material from the conveyor belt. The relatively larger angle allows the force generated by the flushing water sprayed away from the conveyor belt to ensure that the residual solid material is still subjected to the tangential force while having sufficient downward flushing pressure to directly flush away the residual solid material that has loosened from the conveyor belt.

[0043] Twenty-seven, the circulating belt filter type solid-liquid separator of this application, applicable to large flow solid-liquid mixtures, has a filter conveyor belt placed around the top surface of the drive roller that is inclined upward along the conveying direction of the filter conveyor belt. This makes it more advantageous for the liquid and solid materials of the mixture to be conveyed in opposite directions, further facilitating the filtration of the solid-liquid mixture and improving the filtration effect. Under the same conditions, the conveying distance of the solid-liquid mixture can be shortened to achieve the filtration effect of the solid-liquid mixture, and both liquid materials of the solid-liquid mixture can be collected in the receiving tank.

[0044] Twenty-eight, the circulating belt filter solid-liquid separator of this application, applicable to large flow solid-liquid mixtures, has a transmission roller with a built-in drive motor. The two ends of the shaft of the drive motor are fixedly connected to the corresponding filter conveyor frame, which not only simplifies and reduces the size of the equipment, but also allows the drive motor to be effectively isolated from water by setting a built-in motor in the transmission roller, thus preventing the drive motor from being damaged by water ingress.

[0045] 29. The circulating belt filter solid-liquid separator of this application, which is applicable to large flow solid-liquid mixtures, is connected to a pressurized flushing liquid supply pipe at the connection port. The flushing liquid supply pipe is set in parallel with the mixture pipe, so that the cover of the mixture guiding device can be directly flushed by the flushing liquid sprayed from the connection port, avoiding solid-liquid mixture residue in the mixture guiding device and affecting the next use. Attached Figure Description

[0046] Figure 1 This is a three-dimensional schematic diagram of the starting position of the conveying end of a circulating belt filter solid-liquid separator.

[0047] Figure 2 This is a three-dimensional schematic diagram of the conveying end position of a circulating belt filter solid-liquid separator.

[0048] Figure 3 This is a front view schematic diagram of a circulating belt filter solid-liquid separator.

[0049] Figure 4 This is an enlarged side sectional view of the conveying auger at the feed outlet when the feed outlet is open.

[0050] Figure 5 This is a three-dimensional enlarged schematic diagram of the starting position of the circulating filter belt solid-liquid separator behind the water tank, omitting the water tank.

[0051] Figure 6 This is an enlarged front sectional view of the mixing material guiding device.

[0052] Figure 7 This is a magnified right-side view of the guide ring.

[0053] Figure 8 This is a magnified left-side view of the guide ring.

[0054] Figure 9 This is a top-down enlarged schematic diagram of the water receiving filter tray.

[0055] Figure 10 This is a right-side enlarged sectional view of the water receiving filter media tray.

[0056] Figure 11 This is a right-side enlarged cross-sectional view of the water receiving filter tray, with the filter plate hidden. Detailed Implementation

[0057] Combination Figures 1-11 It is known that the circulating belt filter solid-liquid separator suitable for large flow solid-liquid mixtures includes a top-open water receiving tank 1. The bottom of the water receiving tank 1 is provided with a drain port 6 connected to a drain pipe. Parallel filter conveyor frames 2 are fixedly connected to the top of the water receiving tank 1 on both opposite sides. The two ends of the filter conveyor frames 2 are respectively driven by drive rollers 15 to connect to an annular filter conveyor belt 5 for filtering solid-liquid mixtures. A mixture guiding device is fixed above the filter conveyor frame 2 at the beginning of the filter conveyor belt 5. The mixture guiding device is provided with a connecting port 4 for connecting to the mixture pipe. The bottom edges of the two sides of the mixture guiding device are respectively in contact with the top surface of the filter conveyor belt 5. One end of the filter conveyor frame 2 at the end of the filter conveyor belt 5 extends out of the corresponding end of the water receiving tank 1. The end of the filter conveyor frame 2 at the end of the filter conveyor belt 5 is also provided with a scraper 17 for scraping off the solid material on the outer surface of the filter conveyor belt 5. At least one drive roller 15 is connected by a drive motor.

[0058] The mixing material guiding device includes a cover 3 with an open bottom. The connecting port 4 is located at the end of the cover 3 at the beginning of the conveying position of the filter conveyor belt 5. The end of the cover 3 away from the connecting port 4 is located in the middle of the filter conveyor frame 2. The extension direction of the side cover 8 of the cover 3 facing the filter conveyor frame 2 is parallel to the conveying direction of the filter conveyor belt 5, and the width between the side cover 8 decreases from top to bottom. An extended baffle 9 is fixed to the bottom edge of the side cover 8, and the bottom edge of the extended baffle 9 contacts the top surface of the filter conveyor belt 5.

[0059] Inside the cover 3, along the direction away from the connecting opening 4, a guide ring 29, a distribution grid, a leveling plate 32, and a pressure plate 33 are arranged in sequence. The top of the guide ring 29 is fixedly connected to the top of the cover 3 and is coaxially arranged with the connecting opening 4. The top of the distribution grid is fixedly connected to the top of the cover 3, and its two sides are respectively fixedly connected to the corresponding side walls 8 of the cover 3. The two ends of the leveling plate 32 are respectively fixedly connected to the side walls 8 of the cover 3. The pressure plate 33 is inclined from top to bottom in the direction away from the connecting opening 4, and the top edge of the pressure plate 33 is fixedly connected to the top of the cover 3, the bottom edge is fixedly connected to the end wall 7 away from the connecting opening 4, and the two sides are respectively fixedly connected to the corresponding side walls 8.

[0060] The guide ring 29 includes a connecting block 45 fixed to the top of the cover 3. The connecting block 45 has a through hole coaxially arranged with the connecting port 4. At least one through ring is coaxially fixed in the through hole by radial rods 44 evenly distributed along the direction from the axis to the edge. The outermost through ring forms an annular through hole between itself and the inner wall of the through hole, and between two adjacent through rings. The through ring closest to the axis forms a central through hole 43. The inner diameter and width of the annular through hole are arranged along the direction away from the connecting port 4. The inner diameter of the central through hole 43 increases or remains unchanged along the direction away from the connecting port 4. The inner diameter of the end of the material passage facing the connecting port 4 is larger than the inner diameter of the material passage (in this embodiment, a material passage ring A40 and a material passage ring B39 are coaxially fixed in the material passage along the direction from the axis to the edge. An annular through hole B41 is formed between the material passage ring B39 and the inner wall of the material passage. An annular through hole A42 is formed between the material passage ring A40 and the material passage ring B39. A central through hole 43 is formed in the material passage ring A40).

[0061] The width of the feed ring increases in the direction away from the connection port 4, and the edge of the outer ring wall facing the connection port 4 coincides with the edge of the inner ring wall facing the connection port 4.

[0062] The width of the radial rod 44 increases in the direction away from the communication port 4, and the edges of the two opposite sidewalls of the radial rod 44 facing the communication port 4 coincide.

[0063] The two ends of the radial rod 44 extend to be flush with the end face facing the connecting block 45 and the end face facing away from the communication port 4, respectively.

[0064] The width between the two side walls of the connecting block 45 is equal to the maximum inner diameter of the feed hole, and the bottom edge of the end face of the connecting block 45 facing away from the connecting port 4 coincides with the bottom edge of the corresponding end of the feed hole.

[0065] The material distribution grid includes a material distribution grid A30 and a material distribution grid B31 arranged sequentially along the direction away from the connecting port 4. The surface of the material distribution grid A30 is perpendicular to the axis of the connecting port 4, and the distance between the surfaces of the material distribution grid B31 and the material distribution grid A30 increases from top to bottom.

[0066] The material distribution grid A30 includes multiple vertical plates A34 and horizontal plates A35 that are fixedly connected in a crisscross pattern. The material distribution grid B31 includes multiple vertical plates B36 and horizontal plates B37 that are fixedly connected in a crisscross pattern. The top ends of the vertical plates A34 and B36 are respectively fixedly connected to the top of the cover 3. The two ends of the horizontal plates A35 and B37 are respectively connected to the side walls 8 of the cover 3 on the corresponding sides.

[0067] The thickness of the vertical plate A34, the horizontal plate A35, the vertical plate B36, and the horizontal plate B37 all increase in the direction away from the connecting opening 4. Furthermore, the edges of the two end faces of the vertical plate A34 facing the connecting opening 4, the edges of the top and bottom faces of the horizontal plate A35 facing the connecting opening 4, the edges of the two end faces of the vertical plate B36 facing the connecting opening 4, and the edges of the top and bottom faces of the horizontal plate B37 facing the connecting opening 4 respectively coincide.

[0068] The distance between two adjacent vertical plates B36 is less than or equal to the distance between two adjacent vertical plates A34, and the distance between two adjacent horizontal plates B37 is less than or equal to the distance between two adjacent horizontal plates A35.

[0069] The angle between the top surface of the horizontal plate A35 and the connecting opening 4 is greater than or equal to the angle between the bottom surface of the horizontal plate A35 and the connecting opening 4. The angle between the bottom surface of the horizontal plate B37 and the connecting opening 4 is greater than or equal to the angle between the top surface of the horizontal plate B37 and the connecting opening 4. The angle between the top surface of the horizontal plate A35 and the connecting opening 4 is greater than or equal to the angle between the top surface of the horizontal plate B37 and the connecting opening 4. The angle between the bottom surface of the horizontal plate B37 and the connecting opening 4 is greater than or equal to the angle between the bottom surface of the horizontal plate A35 and the connecting opening 4.

[0070] The material leveling plate 32 is provided in multiple groups along the direction away from the connecting port 4. Each group of material leveling plates 32 has multiple plates evenly distributed along the direction perpendicular to the axis of the connecting port 4. The material leveling plate 32 is inclined towards the top of the cover 3 along the direction away from the connecting port 4.

[0071] The surface of the pressure plate 33 is a convex arc surface that protrudes from the lower part of the end cover wall 7 at the end where the connecting port 4 is located.

[0072] The bottom edge of the side cover 8 is lower than the bottom edge of the end cover 7.

[0073] The extended baffle plate 9 is fixedly connected to the bottom edge of the side cover wall 8 via the fixing clamp 10.

[0074] The top of the cover 3 has multiple top beams 13 distributed along the axis parallel to the connecting port 4. The two ends of the top beams 13 extend out of the side wall 8 of the cover 3 on the corresponding side, and are fixedly connected to the fixing frame 2 on the corresponding side by connecting poles 12.

[0075] The top of the connecting pole 12 is provided with a strip-shaped connecting hole A14 along the extension direction of the connecting pole 12. The two ends of the top beam 13 are respectively fixedly connected to the connecting pole 12 by connecting bolts A passing through the strip-shaped connecting hole A14 in an adjustable manner.

[0076] The top edge of the scraper 17 contacts the filter conveyor belt 5 that is wrapped around the upper part of the transmission roller 15, and the scraper 17 is arranged along the tangential direction at the position where the filter conveyor belt 5 contacts the scraper 17.

[0077] Both ends of the scraper 17 are fixedly connected to the top of the side fixing frame 2 via “L”-shaped connecting rods 19.

[0078] The arm connecting the “L”-shaped connecting rod 19 to the fixed frame 2 is provided with a strip-shaped connecting hole B20 along the extension direction of the fixed frame 2. The connecting bolt B passes through the strip-shaped connecting hole B20 to fix the “L”-shaped connecting rod 19 to the fixed frame 20.

[0079] Multiple strip-shaped connecting holes B20 are provided and are arranged sequentially along the extension direction of the arm of the connecting bracket 2 connected to the "L"-shaped connecting rod 19.

[0080] A water-receiving filter media tray 21 is fixedly connected within the area enclosed by the transmission rollers 15 and the filter conveyor belt 5 at both ends of the filter conveyor frame 2. The base 46 of the water-receiving filter media tray 21 is inclined downward along the direction from one side of the filter conveyor frame 2 to the other side of the filter conveyor frame 2. A water-blocking upright plate A47 is provided on the top edge of the base 46, and water-blocking upright plates B48 are provided on the two sides of the base 46. The two sides of the water-blocking upright plate A47 are respectively sealed and fixedly connected to the corresponding ends of the water-blocking upright plate B48 on the same side. A filter plate is placed and fixed on the top surface of the base 46 within the area enclosed by the water-blocking upright plate A47 and the water-blocking upright plate B48. 49. The filter plate 49 is inclined downward along the direction facing the water-blocking upright plate A47. The position of the filter plate 49 away from the water-blocking upright plate A47 is lower than the top of the corresponding position of the water-blocking upright plate B48. The position of the filter plate 49 facing the water-blocking upright plate A47 is lower than the top of the water-blocking upright plate A47. The bottom surface of the chassis 46 is fixedly connected to the connecting crossbar 25 provided between the filter conveying frame 2. The filter conveying frame 2, where the lower edge of the chassis 46 is located, is provided with a strip-shaped through hole 22 along the extension direction of the filter conveying frame 2 at the position between the water-blocking upright plate B48. The top edge of the strip-shaped through hole 22 is located above the side edge of the chassis 46.

[0081] The water-blocking upright plate A47 is attached to the filter conveyor frame 2 on the same side. The edge of the chassis 46 away from the water-blocking upright plate A47 extends to the position of the filter conveyor frame 2 on the same side, leaving a gap for dripping water. The water-blocking upright plate B48 near the beginning of the filter conveyor belt 5 is located below the connecting port 4, and the water-blocking upright plate B48 near the end of the filter conveyor belt 5 is located on the side wall of the water receiving tank 1.

[0082] The top of the filter conveyor 2 is higher than the top surface of the filter conveyor belt 5, and the end face of the filter conveyor 2 facing the filter conveyor belt 5 is provided with a sealing panel 16 that is in close contact with the side edge of the filter conveyor belt 5. The top edge of the sealing panel 16 extends upward to be flush with the top of the filter conveyor 2, and the bottom edge of the sealing panel 16 extends downward to be lower than the bottom surface of the filter conveyor belt 5 that is driven to the top by the transmission roller 15 and higher than the top surface of the filter conveyor belt 5 that is driven to the bottom by the transmission roller 15. Both ends of the sealing panel 16 extend toward the end of the filter conveyor 2 to be flush with the end of the filter conveyor 2.

[0083] The top edge of the water-blocking upright plate A47 is lower than the bottom edge of the sealing panel 16. The distance between the end face of the water-blocking upright plate A47 facing away from the filter conveyor 2 and the filter conveyor 2 is less than the distance between the end face of the sealing panel 16 on the side that contacts the filter conveyor belt 5 and the filter conveyor 2 on the side. The distance between the edge of the chassis 46 on the side away from the water-blocking upright plate A47 and the filter conveyor 2 on the side is less than the distance between the end face of the sealing panel 16 on the side that contacts the filter conveyor belt 5 and the filter conveyor 2 on the side.

[0084] When the water receiving filter media tray 21 is fixedly connected to the fixed filter conveyor frame 2 via the connecting crossbar 25, the water-blocking upright plate A47 and the water-blocking upright plate B48 are both vertically arranged, and the top edge of the water-blocking upright plate A47 and the top edge of the water-blocking upright plate B48 are flush and located in the same horizontal plane.

[0085] On the top surface of the chassis 46, at a position between the water-blocking uprights B48, multiple supporting uprights 51 are evenly distributed along the extension direction parallel to the water-blocking upright A47. The supporting uprights 51 are respectively set perpendicular to the water-blocking upright A47. When the water receiving filter media tray 21 is fixedly connected to the fixed filter conveyor frame 2 via the connecting crossbar 25, all the supporting uprights 51 are vertical. The top edge of the supporting uprights 51 is inclined downward along the direction facing the water-blocking upright A47, and the top edges of the supporting uprights 51 are located in the same plane. The filter plate 49 is placed and fixed on the top surface of the supporting uprights 51.

[0086] The filter plate 49 is provided in multiple ways, and is attached and fixed in sequence along the extension direction parallel to the water-blocking upright plate A47. Each filter plate 49 placed on the chassis 46 has multiple supporting upright plates 51 below it.

[0087] The filter plate 49 has a filter plate 53 on the side away from the water-blocking upright plate A47. The filter plate 53 has a matching guide notch 54 corresponding to the support upright plate 51. When the filter plate 49 is placed and fixed on the chassis 46 through the support upright plate 51, the filter plate 49 is in close contact with the water-blocking upright plate A47. The end of the support upright plate 51 away from the water-blocking upright plate A47 extends outward through the guide notch 54 and outwards from the filter plate 49.

[0088] The bottom of the filter plate 53 is fixedly provided with a filter soft plate 52. The distance between the bottom edge of the filter soft plate 52 and the bottom edge of the filter plate 53 is greater than or equal to the distance between the bottom edge of the filter plate 53 and the corresponding position of the chassis 46 when the filter plate 49 is placed and fixed on the chassis 46 by the support plate 51.

[0089] The filter plate 49, filter vertical plate 53 and filter soft plate 52 are each uniformly distributed with the same filter holes B50, and the distribution density of the filter holes B50 distributed on the filter plate 49, filter vertical plate 53 and filter soft plate 52 is also the same.

[0090] The length of the strip-shaped through hole 22 is greater than the dimension of each filter plate 49 along the extension direction of the water-blocking upright plate A47, and the distance between the top hole wall and the bottom hole wall of the strip-shaped through hole 22 is greater than the height difference between the top of each filter plate 49 and the bottom of the filter upright plate 53.

[0091] The connecting surface of the connecting crossbeam 25 is inclined to match the chassis 46 and is fixedly connected to the bottom surface of the chassis 46 by connecting bolts C. The connecting crossbeam 25 is fixedly connected to the filter conveyor frame 2 by connecting crossbars 26.

[0092] Multiple backwash spray horizontal pipes 27 (in this embodiment, two backwash spray pipes 27 are fixedly connected) between the filter conveyor frames 2 and below the base 46 of the water receiving filter media tray 21. The two ends of the backwash spray horizontal pipes 27 are fixedly connected to the filter conveyor frames 2 respectively. Multiple downward spray nozzles 28 are provided at equal intervals along the extension direction of the backwash spray horizontal pipes 27 on the bottom side wall of the backwash spray horizontal pipes 27. The same end of the backwash spray horizontal pipes 27 extends outward from the filter conveyor frame 2 and is connected in parallel to the spray main pipe joint 23 through the spray branch pipes 24 respectively. The spray branch pipes 24 and the spray main pipe joint 23 are fixedly connected to the filter conveyor frame 2 on their respective sides. The spray main pipe joint 23 is connected to the pressurized flushing liquid supply pipe.

[0093] The flushing fluid supply pipe connected to the main spray pipe joint 23 is equipped with valve B and regulating valve B for adjusting the flushing hydraulic pressure.

[0094] The nozzles 28 are respectively located at the bottom of the two side walls of the backwash spray horizontal pipe 27. The nozzles 28 at the bottom of the two side walls of the backwash spray horizontal pipe 27 are symmetrically or staggered at the connection points with the backwash spray horizontal pipe 27.

[0095] The nozzles 28 on the opposite sides of two adjacent backwash spray pipes 27 spray onto the filter conveyor belt 5 at the same transverse line.

[0096] The angle between the spray direction of the nozzle 28 spraying towards the conveyor belt 5 and the horizontal plane is less than or equal to the angle between the spray direction of the nozzle 28 spraying away from the conveyor belt 5 and the horizontal plane.

[0097] Both the backwash spray horizontal pipe 27 and the spray branch pipe 24 are lower than the bottom edge of the strip-shaped through hole 22.

[0098] The bottom edge of the strip-shaped through hole 22 is located above the lower side edge of the chassis 46.

[0099] Multiple support plates 11 are fixedly installed on the top of the water receiving tank 1 along the conveying direction of the filter conveyor belt 5. The filter conveyor frame 2 is fixedly connected to the water receiving tank 1 through the support plates 11.

[0100] The filter conveyor belt 5, which is placed around the top surface of the drive roller 15, is inclined upward along the conveying direction of the filter conveyor belt 5.

[0101] The transmission roller 15 is a transmission roller with a built-in drive motor, and the two ends of the shaft of the drive motor are respectively fixedly connected to the corresponding filter conveyor frame 2.

[0102] The connecting port 4 is also connected to a pressurized flushing fluid supply pipe, which is arranged in parallel with the mixing pipe.

[0103] When using this application, the drive motor of the filter conveyor belt 5 is started, and then the valve O of the mixing pipe and the valve B of the flushing liquid supply pipe connected to the spray main pipe joint 23 are opened. The mixture in the mixing pipe is sprayed from the connecting port 4 into the cover 3. After the mixture is sprayed from the connecting port 4 into the cover 3, it first passes through the guide ring 29, so that the mixture sprayed from the connecting port 4 passes through the annular through hole B41, the annular through hole A42 and the central through hole 43 respectively. The guide ring 29 initially disperses the mixture sprayed from the connecting port 4 outward in an annular shape, thereby initially reducing the impact force of the mixture and the speed of the mixture along the axial direction of the connecting port 4.

[0104] After passing through the guide ring 29, the mixture, under the influence of gravity and inertia, obliquely descends through the distribution grids A30 and B31. When the mixture first passes through the vertical plate A34 and horizontal plate A35 of the distribution grid A30, the thickness of both the vertical plate A34 and the horizontal plate A35 increases in the direction away from the connecting opening 4, thus ensuring sufficient dispersion of the mixture through the distribution grid A30. Some of the mixture directly passes through the channel formed between the horizontal plate A35 and the vertical plate A34 and continues along the trajectory after passing through the guide ring 29. Some of the mixture that directly passes through the channel formed between the horizontal plate A35 and the vertical plate A34 will fall downwards onto the filter conveyor belt 5, while some of the mixture will contact the mixture on the top surface of the horizontal plate A35 and the channel. The mixture splashes upwards at an angle due to the inclined top surface of the horizontal plate A35, colliding with a portion of the mixture that passes through the channel formed between the adjacent horizontal plate A35 and the vertical plate A34. Additionally, a portion of the mixture that contacts both sides of the vertical plate A34 splashes upwards to the corresponding side due to the side surface of the vertical plate A34, colliding with a portion of the mixture that passes through the channel formed between the adjacent vertical plate A34 and the horizontal plate A35. This further reduces the impact force and axial velocity of the mixture along the connecting opening 4, and the mutual collisions allow for more thorough mixing and diffusion of the mixture relative to the cross-sectional area of ​​the cover 3. Then, when the mixture... When the material passes through the vertical plate B36 and horizontal plate B37 of the distribution grid B31, the thickness of both the vertical plate B36 and the horizontal plate B37 increases in the direction away from the connecting opening 4. This allows the material to be further dispersed by the distribution grid B31. Some of the material passes directly through the channel formed between the horizontal plate B37 and the vertical plate B36, continuing along the trajectory after passing through the distribution grid A30. Some of the material passing directly through the channel between the horizontal plate B37 and the vertical plate B36 falls downwards onto the filter conveyor belt 5, while some of the material comes into contact with the material on the top surface of the horizontal plate B37. The mixture splashes upwards at an angle due to the inclined top surface of the horizontal plate B37, and collides with a portion of the mixture that passes through the channel formed between the adjacent horizontal plate B37 and the vertical plate B36. Additionally, a portion of the mixture that comes into contact with the two sides of the vertical plate B36 splashes to the corresponding side through the side end face of the vertical plate B36, and collides with a portion of the mixture that passes through the channel formed between the adjacent vertical plate B36 and the horizontal plate B37. This further reduces the impact force and the axial velocity of the mixture along the connecting port 4, and the mutual collision of the mixture allows the mixture to be more fully mixed and diffused relative to the cross-sectional area of ​​the cover 3.Since the potential energy of the mixture above the cover 3 is converted from kinetic energy, the velocity of the mixture above the cover 3 is relatively lower than that of the mixture below the cover 3. Due to the inclined arrangement of the vertical plate B36, the contact time between the mixture above the cover 3 and the distribution grid B31 is earlier than that between the mixture below the cover 3 and the distribution grid B31. This allows for further dispersion of more of the mixture after passing through the distribution grid A30 and then through the distribution grid B31. Furthermore, the inclined bottom surface of the horizontal plate B35 causes a greater portion of the mixture to move downwards after passing through the distribution grid B31, further reducing the impact force of the mixture in the axial direction of the connecting port 4. Compared to the mixture after passing through the distribution grid A30, more of the mixture after passing through the distribution grid B31 disperses downwards and falls onto the filter conveyor belt 5.

[0105] After passing through the distribution grids A30 and B31, the mixture that remains inside the cover 3 and does not fall onto the filter conveyor belt 5 continues to pass through the equalization plate 32 under the influence of gravity and inertia. Since the equalization plate 32 is inclined upwards away from the connecting port 4, each time the mixture contacts the equalization plate 32, it splashes upwards, thus reducing the speed of this portion of the mixture along the axial direction of the connecting port 4. Furthermore, because there are multiple sets of equalization plates 32, each set containing multiple equal-spaced plates, most of the mixture's speed along the axial direction of the connecting port 4 is effectively reduced during its passage through the equalization plate 32 area. Some of the mixture does not contact the equalization plate 32 and continues along its previous trajectory. Of the mixture passing through the equalization plate 32 area, the vast majority falls downwards onto the filter conveyor belt 5 during its passage.

[0106] After passing through the powder platen 32, the mixture that remains inside the cover 3 and does not fall onto the filter conveyor belt 5 moves towards the pressure plate 33 under the influence of gravity and inertia. Since the speed of the mixture along the axis of the connecting opening 4 is relatively limited at this point, some of the mixture fails to contact the pressure plate 33 and falls directly onto the filter conveyor belt 5 under gravity; another portion contacts the pressure plate 33 and falls downwards onto the filter conveyor belt 5 under gravity; still another portion contacts the pressure plate 33. Because this portion of the mixture still has some kinetic energy upon contact, it splashes up after contact. However, due to the curved structure of the pressure plate 33, the splashed mixture directly splashes downwards and accelerates down onto the filter conveyor belt 5 under gravity.

[0107] After the mixture enters the cover 3, as it falls onto the filter conveyor belt 5, it is restricted by the side wall 8 of the cover 3 and falls within the area where the extended baffle 9 at the bottom edge of the side wall 8 contacts the filter conveyor belt 5 passing through the cover 3. This prevents the mixture in contact with both sides of the filter conveyor belt 5 from having insufficient filtration area, which would affect the filtration efficiency of the mixture.

[0108] When the mixture falls onto the top surface of the filter conveyor belt 5 below the cover 3, the solid material in the mixture fails to pass through the filter holes of the filter conveyor belt 5 and remains on the top surface of the filter conveyor belt 5. The liquid material, however, passes through the filter holes of the filter conveyor belt 5. Since the filter conveyor belt 5 is continuously conveying, the portion of the mixture that falls onto the filter conveyor belt 5 is conveyed towards the scraper 17. During the conveying process towards the scraper 17, the mixture can be continuously filtered, and when the filter conveyor belt 5 reaches the scraper 17, the mixture has been fully filtered. In addition, new portions of the filter conveyor belt 5 continuously pass under the cover 3 to filter the falling mixture. By adjusting the conveying speed of the filter conveyor belt 5, the amount of mixture falling onto the top surface of the filter conveyor belt 5 can always be kept at a suitable level, so that when the filter conveyor belt 5 conveys the mixture to the scraper 17, the solid and liquid materials of the mixture have been completely filtered, or even just completely filtered.

[0109] When the filter conveyor belt 5 completely filters the mixture, the remaining solid material is conveyed to the scraper 17. The scraper 17 then scrapes off the remaining solid material on the surface of the filter conveyor belt 5. The scraped solid material separates from the filter conveyor belt 5 and falls down along the scraper 17. At this time, the water tank 1 is located at the end of the filter conveyor belt 5 and a solid material collection device is placed below the scraper 17. The solid material scraped off by the scraper 17 from the filter conveyor belt 5 falls into the solid material collection device.

[0110] The liquid material filtered down by the filter conveyor belt 5 falls downwards into the water receiving filter tray 21. Since the filter conveyor belt 5 can only filter solid material larger than the filter holes A of the filter conveyor belt 5, some solid material smaller than the filter holes A may still pass through the filter holes A of the filter conveyor belt 5 due to the impact of the dripping mixture and the gravity of the liquid. Even if the liquid material after filtration through the filter holes A of the filter conveyor belt 5 contains a small amount of small-sized solid material, its impact on subsequent liquid material processing is negligible.

[0111] The liquid falling from the filter conveyor belt 5 is confined to the filter plate 49 fixed in the water receiving filter media tray 21. Due to the inclined setting of the filter plate 49, the liquid collected on the filter plate 49 will continue to fall down through the filter holes B50 of the filter plate 49 as it flows down the filter plate 49 and into the water receiving filter media tray 21. After falling into the water receiving filter media tray 21, the liquid continues to flow down along the inclined base 46 of the water receiving filter media tray 21, and then passes through the filter upright plate 53 and the filter soft plate 52 at the bottom edge of the filter plate 49, and finally drips down along the lowest edge of the base 46 into the water receiving tank 1. In addition, after passing the scraper 17, the filter conveyor belt 5 continues to be conveyed downward around the drive roller 15. The filter conveyor belt 5, which is placed at the bottom of the drive roller 15, is conveyed below the water receiving filter media plate 21 and the backwash spray horizontal pipe 27. When it passes the flushing liquid sprayed by the nozzle 28 of the backwash spray horizontal pipe 27, the very small amount of solid material that remains on the filter conveyor belt 5 after being scraped off by the scraper 17 is directly backwashed away by the flushing liquid and falls directly into the water receiving tank 1 along with the flushing liquid.

[0112] The very small amount of solid material remaining on the filter conveyor belt 5 is directly washed away by the rinsing liquid and falls into the water receiving tank 1. The very small amount of solid material remaining on the filter conveyor belt 5 after being scraped by the scraper 17 is about the same size as or even smaller than the filter holes A of the filter conveyor belt 5. Because the weave gaps of the filter conveyor belt 5 trap this kind of solid material, it is not scraped away by the scraper 17. The amount of rinsing liquid that falls into the water receiving tank 1 is much greater than the amount of solid material that is washed off. Therefore, the proportion of solid material in the rinsing liquid is also very low. This kind of small solid material with a very low content will not affect the subsequent processing of the liquid.

[0113] The cleaned filter conveyor belt 5 continues to be conveyed to the drive roller 15 at the beginning of the conveyor, and is then conveyed upward through the drive roller 15 at that end and passes through the cover 3 again.

[0114] In addition, the liquid material filtered from the filter conveyor belt 5 is filtered sequentially by the filter plate 49, the filter vertical plate 53, and the filter soft plate 52 during contact with the water receiving filter media tray 21. This filters out the small amount of small-sized solid material remaining in the liquid material filtered from the filter conveyor belt 5, so that the liquid material falling into the water receiving filter media tray 21 is almost free of solid material. Even if it contains a trace amount of smaller-sized solid material, it will not affect the subsequent processing of the liquid material.

[0115] Finally, the liquid in water tank 1 is discharged out through drain port 6.

[0116] For each period of use (in this embodiment, when the application is used until the end of the shift for the day), valve O on the mixing pipe connected to the connection port 4 is closed, and then valve A on the flushing liquid supply pipe connected to the connection port 4 is opened, and the flushing liquid is sprayed into the cover 3 from the connection port 4. The process of the flushing liquid in the cover 3 is similar to the process of the mixing material in the cover 3 before. The pressure of the flushing liquid sprayed out of the connection port 4 can be adjusted by the regulating valve A on the flushing liquid supply pipe connected to the connection port 4. This causes the remaining mixture inside the cover 3 to drip down under the flushing action of the flushing liquid, and then drip onto the filter conveyor belt 5. The drive motor continues to drive the transmission roller 15 to drive the filter conveyor belt 5 to continue conveying, and the filter continues to filter during the conveying process of the filter conveyor belt 5. When the filter conveyor belt 5 conveys the remaining solid material after filtration to the scraper 17, the scraper 17 continues to scrape off the solid material on the filter conveyor belt 5. When the filter conveyor belt 5 is conveyed to the position of the flushing liquid sprayed by the nozzle 28 of the backwash spray horizontal pipe 27, the flushing liquid backwashes the solid material remaining on the filter conveyor belt 5. After all the mixture inside the cover 3 has been flushed off onto the filter conveyor belt 5 or after the flushing liquid has been continuously flushed for a period of time (in this embodiment, continuous flushing for 5 minutes), the valve A on the flushing liquid supply pipe connected to the connecting port 4 is closed. After all the residual solid material on the filter conveyor belt 5 is gone, the valve B of the flushing liquid supply pipe connected to the spray main pipe joint 23 is closed. Then, when the liquid material dripping from the filter conveyor belt 5 is very small and the dripping frequency is very low, the drive motor is also turned off. Then, the filter plates 49 on the water receiving filter media tray 21 are taken out one by one through the strip-shaped through hole 22 and rinsed clean. Then, the washing tool is inserted into the water receiving filter media tray 21 through the strip-shaped through hole 22 to clean the inner wall of the water receiving filter media tray 21. Finally, the rinsed filter plates 49 are inserted one by one through the strip-shaped through hole 22 and placed on the water receiving filter media tray 21.

[0117] This application utilizes a filter conveyor belt 5 to filter solid materials. The solid material is scraped off by the scraper 17 and rinsed by the nozzles 28 of the backwash spray pipe 27, allowing the filter conveyor belt 5 to continue filtering subsequent solid-liquid mixtures, thus achieving continuous filtration. This makes it suitable for the continuous filtration and separation of various large-flow solid-liquid mixtures, facilitating the separate processing of solid and liquid materials. It is particularly suitable for food processing liquid treatment in the food processing industry; it can also be applied to the continuous separation and treatment of large-flow solid-liquid mixtures in many other technical fields.

Claims

1. A circulating belt filter solid-liquid separator suitable for large-flow solid-liquid mixtures, characterized in that: The system includes a top-opening water receiving tank (1), with a drain outlet (6) at the bottom connected to a drain pipe. Parallel filter conveyor frames (2) are fixedly connected to the top of the water receiving tank (1) on both opposite sides. Both ends of the filter conveyor frames (2) are connected via drive rollers (15) to an annular filter conveyor belt (5) for filtering solid-liquid mixtures. A mixture guiding device is fixed above the filter conveyor frame (2) at the beginning of the filter conveyor belt (5). The mixing material guiding device is provided with a connecting port (4) for connecting the mixing material pipe. The bottom edges of both sides of the mixing material guiding device are in contact with the top surface of the filter conveyor belt (5). One end of the filter conveyor frame (2) located at the end of the filter conveyor belt (5) extends out of the corresponding end of the water receiving tank (1). The end of the filter conveyor frame (2) at the end of the filter conveyor belt (5) is also provided with a scraper (17) for scraping off the solid material on the outer surface of the filter conveyor belt (5) that it passes through. At least one drive roller (15) is connected by a drive motor.

2. The circulating belt filter solid-liquid separator suitable for large-flow solid-liquid mixtures as described in claim 1, characterized in that: The mixing material guiding device includes a cover (3) with an open bottom. The connecting port (4) is located at the end of the cover (3) at the beginning of the conveying of the filter conveyor belt (5). The end of the cover (3) away from the connecting port (4) is located in the middle of the filter conveyor frame (2). The extension direction of the side cover (8) of the cover (3) facing the filter conveyor frame (2) is parallel to the conveying direction of the filter conveyor belt (5), and the width between the side cover (8) decreases from top to bottom. An extended baffle (9) is fixed to the bottom edge of the side cover (8), and the bottom edge of the extended baffle (9) contacts the top surface of the filter conveyor belt (5). The cover (3) is provided with guides in sequence along the direction away from the connecting port (4). The material guide ring (29), the material distribution grid, the material equalization plate (32) and the pressure plate (33) are provided. The top of the material guide ring (29) is fixedly connected to the top of the cover (3) and is coaxially arranged with the connecting port (4). The top of the material distribution grid is fixedly connected to the top of the cover (3) and the two sides are fixedly connected to the corresponding side walls (8) of the cover (3). The two ends of the material equalization plate (32) are fixedly connected to the side walls (8) of the cover (3). The pressure plate (33) is inclined from top to bottom away from the connecting port (4). The top edge of the pressure plate (33) is fixedly connected to the top of the cover (3), the bottom edge is fixedly connected to the end wall (7) away from the connecting port (4), and the two sides are fixedly connected to the corresponding side walls (8).

3. The circulating belt filter solid-liquid separator suitable for large-flow solid-liquid mixtures as described in claim 2, characterized in that: The guide ring (29) includes a connecting block (45) fixed to the top of the cover (3). The connecting block (45) is provided with a material passage hole coaxially arranged with the connecting port (4). At least one material passage ring is coaxially fixed in the material passage hole by a radially distributed rod (44) along the direction from the axis to the edge. The outermost material passage ring and the inner wall of the material passage hole and the two adjacent material passage rings form annular through holes respectively. The material passage ring closest to the axis forms a central through hole (43). The inner diameter and ring width of the annular through hole increase in the direction away from the connecting port (4). The inner diameter of the central through hole (43) increases or remains unchanged in the direction away from the connecting port (4). The inner diameter of the end of the material passage hole facing the connecting port (4) is larger than the inner diameter of the material passage hole.

4. The circulating belt filter solid-liquid separator suitable for large-flow solid-liquid mixtures as described in claim 2, characterized in that: The material distribution grid includes a material distribution grid A (30) and a material distribution grid B (31) arranged sequentially along the direction away from the connecting opening (4). The surface of the material distribution grid A (30) is perpendicular to the axis of the connecting opening (4), and the distance between the surfaces of the material distribution grid B (31) and the material distribution grid A (30) increases from top to bottom.

5. The circulating belt filter solid-liquid separator suitable for large-flow solid-liquid mixtures as described in claim 2, characterized in that: The material leveling plate (32) is provided in multiple groups along the direction away from the connecting port (4). Each group of material leveling plates (32) is provided with multiple plates at equal intervals along the direction perpendicular to the axis of the connecting port (4). The material leveling plate (32) is inclined towards the top of the cover (3) along the direction away from the connecting port (4).

6. The circulating belt filter solid-liquid separator suitable for large-flow solid-liquid mixtures as described in claim 2, characterized in that: The surface of the pressure plate (33) is a convex arc surface that protrudes from the lower part of the end cover wall (7) at the end where the connecting port (4) is located.

7. The circulating belt filter solid-liquid separator suitable for large-flow solid-liquid mixtures as described in claim 1, characterized in that: A water receiving filter media tray (21) is fixedly connected within the area enclosed by the transmission rollers (15) at both ends and the filter conveyor belt (5) between the filter conveyor frames (2). The base (46) of the water receiving filter media tray (21) is inclined downward along the direction from one side of the filter conveyor frame (2) to the other side of the filter conveyor frame (2). A water-blocking plate A (47) is provided on the top edge of the base (46), and water-blocking plates B (48) are provided on the two sides of the base (46). The two sides of the water-blocking plate A (47) are respectively sealed and fixedly connected to the corresponding ends of the water-blocking plate B (48) on the same side. A filter plate (4) is placed and fixed on the top surface of the base (46) within the area enclosed by the water-blocking plate A (47) and the water-blocking plate B (48). 9) The filter plate (49) is inclined downward along the direction facing the water-blocking upright plate A (47). The position of the filter plate (49) away from the water-blocking upright plate A (47) is lower than the top of the corresponding position of the water-blocking upright plate B (48). The position of the filter plate (49) facing the water-blocking upright plate A (47) is lower than the top of the water-blocking upright plate A (47). The bottom surface of the chassis (46) is fixedly connected to the connecting crossbar (25) provided between the filter conveying frame (2). The filter conveying frame (2) on the lower side edge of the chassis (46) is provided with a strip-shaped through hole (22) along the extension direction of the filter conveying frame (2) at the position between the water-blocking upright plate B (48). The top edge of the strip-shaped through hole (22) is located above the side edge of the chassis (46).

8. The circulating belt filter solid-liquid separator suitable for large-flow solid-liquid mixtures as described in claim 7, characterized in that: The water-blocking plate A (47) is attached to the filter conveyor (2) on the same side. The edge of the chassis (46) away from the water-blocking plate A (47) extends to the position of the filter conveyor (2) on the same side, leaving a gap for dripping water. The water-blocking plate B (48) near the beginning of the filter conveyor belt (5) is located below the connecting port (4), and the water-blocking plate B (48) near the end of the filter conveyor belt (5) is located on the side wall of the water receiving tank (1).

9. The circulating belt filter solid-liquid separator suitable for large-flow solid-liquid mixtures as described in claim 7, characterized in that: The top surface of the chassis (46) is located between the water-blocking uprights B (48) and is evenly distributed along the extension direction parallel to the water-blocking uprights A (47). The support uprights (51) are respectively set perpendicular to the water-blocking uprights A (47). When the water receiving filter media tray (21) is fixedly connected to the fixed filter conveyor frame (2) through the connecting cross frame (25), the support uprights (51) are all vertical. The top edge of the support uprights (51) is inclined downward along the direction facing the water-blocking uprights A (47), and the top edge of the support uprights (51) is located in the same plane. The filter plate (49) is placed and fixed on the top surface of the support uprights (51).

10. The circulating belt filter solid-liquid separator for high-flow-rate solid-liquid mixtures as described in claim 7, characterized in that: Multiple backwash spray pipes (27) are fixedly connected between the filter conveyor frames (2) and below the base (46) of the water receiving filter media tray (21). The two ends of the backwash spray pipes (27) are fixedly connected to the filter conveyor frames (2). Multiple downward spray nozzles (28) are provided at equal intervals along the extension direction of the backwash spray pipes (27) at the bottom of the side wall of the backwash spray pipes (27). The same end of the backwash spray pipes (27) extends outward from the filter conveyor frames (2) and is connected in parallel with the spray main pipe joint (23) through the spray branch pipes (24). The spray branch pipes (24) and the spray main pipe joint (23) are fixedly connected to the filter conveyor frames (2) on their respective sides. The spray main pipe joint (23) is connected to the pressurized flushing liquid supply pipe.

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