Double-push double-out type solid-liquid separation structure for pusher centrifuge and centrifuge thereof

Abstract

The application discloses a double-push double-out type solid-liquid separation structure for a pusher centrifuge and a centrifuge thereof, relates to the technical field of solid-liquid separation equipment, and has the advantages that the discharge direction of the centrifuge is bidirectional, and the discharge efficiency is improved, and the technical scheme points are as follows: a product chamber, a rotating drum rotatably connected in the product chamber through a driving element, and a screen drum located on the inner wall of the rotating drum are included; the longitudinal section of the rotating drum is in the shape of a Chinese character 'fang'; a gap 1 exists between the horizontal distribution of the opening of the rotating drum and the vertical wall of the product chamber; a plurality of discharge holes are formed in the side of the rotating drum away from the opening of the rotating drum; each discharge hole is located on one side of the screen drum; a bidirectional material distributing assembly is further arranged in the screen drum; the driving element drives the bidirectional material distributing assembly to reciprocate in the screen drum; and solid-phase discharge pipes are arranged below the opening of the rotating drum and below the discharge holes.

Description

Technical Field

[0001] This invention relates to the field of solid-liquid separation equipment technology, specifically to a double-push double-outlet solid-liquid separation structure for a pusher centrifuge and the centrifuge thereof. Background Technology

[0002] Push-feed centrifuges, as a type of continuously operating filtration centrifuge, have a wide range of applications in the field of solid-liquid separation.

[0003] Currently, the existing push-feed centrifuges on the market adopt a one-way unloading structure. This unloading method is commonly used in centrifuge separation and discharge operations, but the discharge efficiency is low.

[0004] Therefore, the applicant has developed a new technical solution in the actual production process to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the aforementioned technical shortcomings, the present invention aims to provide a double-push, double-discharge solid-liquid separation structure for a pusher centrifuge and the centrifuge thereof, which has the advantage of enabling bidirectional discharge of the centrifuge and improving discharge efficiency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention provides a double-push double-outlet solid-liquid separation structure for a pusher centrifuge, including a product chamber and a rotating drum rotatably connected to the product chamber via a drive component, and a screen cylinder located on the inner wall of the rotating drum. The longitudinal section of the rotating drum is U-shaped, and the opening of the rotating drum is horizontally distributed with a gap between it and the vertical wall of the product chamber. The rotating drum has a plurality of discharge holes on the side away from the drum opening, and each discharge hole is located on one side of the screen cylinder. It also includes a bidirectional material feeding assembly installed inside the screen cylinder. The driving component pushes the bidirectional material feeding assembly to reciprocate inside the screen cylinder. The product chamber is provided with a solid phase discharge pipe below one side of the drum opening and below the discharge hole.

[0007] By adopting the above technical solution, the drive unit drives the drum to rotate, and the bidirectional feeding assembly feeds the slurry entering the drum in both directions. The drum drives the screen cylinder to rotate, and as the screen cylinder rotates, it performs solid-liquid separation on the slurry entering the drum. The drive unit pushes the bidirectional feeding assembly to move back and forth in the screen cylinder, so that the separated solid material is pushed out into gap one and the discharge hole as the drive unit pushes the bidirectional feeding assembly to move, and then discharged from the two solid discharge pipes in the product chamber, so that the centrifuge discharges in both directions, improving the discharge efficiency.

[0008] Preferably, the product chamber has an installation port on one side wall facing the drum opening, and a door panel is bolted to the outer wall of the product chamber to close the installation port. A feed pipe is fixedly installed on the door panel to supply slurry to the bidirectional fabric assembly, and the bidirectional fabric assembly is slidably connected to the outer wall of the feed pipe.

[0009] Preferably, it also includes an oil tank for storing hydraulic oil, which also functions as a centrifuge base, and a bearing housing is mounted on the oil tank, with the drive component mounted on the bearing housing; The driving component includes a hollow shaft that rotates and a push rod shaft that passes through the hollow shaft and performs horizontal linear and rotational movements. The hollow shaft is rotatably connected to a bearing housing, and one end of both the hollow shaft and the push rod shaft extends out of the bearing housing and into the product chamber. The drum is located at the end of the hollow shaft that enters the product chamber. One end of the push rod shaft is provided with a base plate located inside the drum. The base plate has several support columns, and each support column has a pusher plate at the end away from the base plate. The bidirectional feeding assembly is located on the pusher plate, and the outer wall of the pusher plate has a pusher ring that abuts against the inner wall of the screen cylinder.

[0010] Preferably, the bidirectional fabric feeding assembly includes a main fabric feeder and an auxiliary fabric feeder respectively disposed on both sides of the pusher plate; The main feeder includes a main body slidably connected to the outer wall of the feed pipe and a base plate disposed on one side of the main body. The main body includes an annular plate slidably connected to the outer wall of the feed pipe and a conical cylinder coaxially disposed on one side of the annular plate. The taper of the conical cylinder gradually moves away from the annular plate. An annular disk is coaxially disposed at the end of the conical cylinder away from the annular plate. A vertical cylinder is coaxially disposed at the end of the annular disk away from the conical cylinder. The base plate is mounted on the vertical cylinder and is distributed directly opposite the annular disk. The base plate is mounted on a pusher plate. The chassis is provided with several partitions, one end of each partition abutting against the wall of the vertical cylinder. Two partitions form a group. The outer wall of the vertical cylinder has a material passage hole I between two adjacent groups of partitions. The chassis has a material passage hole II in each group of partitions.

[0011] Preferably, the auxiliary material feeder includes material passage holes three on the pusher plate and distributed corresponding to each material passage hole two. The material passage holes three communicate with the material passage holes two. Each of the material passage holes two is distributed close to the inner wall of the vertical cylinder. The pusher plate is provided with a retaining ring on the side away from the base plate. The longitudinal section of the retaining ring is L-shaped. The horizontal part of the retaining ring is fixedly connected to the surface of the pusher plate. The vertical distribution is directly opposite the pusher plate. Each of the material passage holes three is distributed directly opposite the vertical part of the retaining ring.

[0012] Preferably, the hollow shaft is rotatably connected to the bearing housing, and both ends extend out of the bearing housing. The inner wall of the hollow shaft is provided with a guide key, and the outer wall of the push rod shaft is provided with a guide groove for the guide key to slide along the length direction of the push rod shaft. The drum is provided with evenly distributed drainage holes along the circumferential direction. The drum is provided with a groove on the side with the screen cylinder that communicates with the drainage holes and is larger than the drainage holes.

[0013] Preferably, the product chamber has an outer discharge plate on the side of the screen cylinder away from the hollow shaft and an inner discharge plate on the side of the screen cylinder close to the hollow shaft. The two solid discharge pipes on the lower end wall of the product chamber are respectively connected to the outer discharge plate and the inner discharge plate.

[0014] Preferably, the inner wall of the product chamber is provided with several annular baffles, and each baffle has a gap with the outer wall of the drum. The outer wall of the product chamber is provided with a liquid phase water outlet pipe that communicates with the space between adjacent baffles. The outer feed plate and the inner feed plate are respectively fixed on the opposite side of the two baffles that are furthest apart. The outer feed plate and the inner feed plate include a semi-arc plate fixed on the baffle plate and a baffle plate set at both ends below the semi-arc plate. The bottom of both baffle plates extends into the solid phase outlet pipe.

[0015] Preferably, a washing pipe is provided inside the feed pipe, one end of the washing pipe passes through the pusher plate, and the other end is provided with a bent pipe that extends out of the feed pipe. The washing pipe has several washing holes on the outer wall of the feeder plate. The door panel is provided with a second washing pipe. The second washing pipe is located above the feed pipe, with one end of the second washing pipe extending out of the door panel and the other end extending towards the screen cylinder. The second washing pipe is provided with several nozzles that spray towards the inner wall of the screen cylinder.

[0016] Preferably, the outer wall of the washing pipe is provided with an inverted conical block, with the side of the inverted conical block with a larger taper distributed near the pusher plate and the side with a smaller taper distributed near the feed pipe.

[0017] Preferably, the washing pipe has a T-shaped guide pipe rotatably connected to one end that passes through the pusher plate. The openings at both ends of the guide pipe, which are distributed vertically, extend toward the screen cylinder. The guide pipe replaces each washing hole. The pipe body, which is distributed vertically, is fixed to one side of the corresponding support column. The openings at both ends of the guide pipe, which are distributed vertically, are connected by an annular sealing plate at the end that passes through the support column. A water distribution ring with a U-shaped longitudinal section is rotatably connected to the outer wall of the sealing plate. The outer wall of the water distribution ring is close to the screen cylinder and has several spray nozzles distributed circumferentially. The rotating drum is equipped with a driving component that makes the rotation speed of the water distribution ring and the sealing plate different.

[0018] Another object of the present invention is to provide a pusher centrifuge.

[0019] The beneficial effects of this invention are as follows: the driving component drives the drum to rotate, the bidirectional feeding assembly feeds the slurry entering the drum in both directions, the drum drives the screen cylinder to rotate, and as the screen cylinder rotates, the slurry entering the drum undergoes solid-liquid separation. The driving component pushes the bidirectional feeding assembly to move back and forth inside the screen cylinder, so that the separated solid material is pushed out into gap one and the discharge hole as the driving component pushes the bidirectional feeding assembly to move, and then discharged from the two solid discharge pipes in the product chamber, so that the centrifuge discharge direction is bidirectional discharge, improving the discharge efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this embodiment; Figure 2 for Figure 1 Enlarged structural diagram of section C; Figure 3 for Figure 1 Enlarged structural diagram of section D in the middle; Figure 4 This is a schematic diagram illustrating the chassis structure in this embodiment; Figure 5 This is a schematic diagram illustrating the slurry flow trajectory in this embodiment; Figure 6 This is a schematic diagram illustrating the structure of the liquid phase water outlet pipe in this embodiment; Figure 7 This is a schematic diagram illustrating the structure of the feed hole in this embodiment; Figure 8 This is a schematic diagram illustrating the structure of the drum where the horizontal portion is hidden, as shown in this embodiment. Figure 9 This is a schematic diagram illustrating the structure of the guide tube in this embodiment; Figure 10 This is a structural diagram illustrating protective cover one, protective cover two, and protective cover three in this embodiment.

[0022] Explanation of reference numerals in the attached figures: In the diagram: 1. Oil tank; 2. Bearing housing; 3. Rear bearing; 4. Front bearing; 5. Rear bearing cover; 6. Front bearing cover; 7. Hollow shaft; 8. Push rod shaft; 9. Cylinder pulley; 10. Cylinder cover; 11. Compound piston; 15. Product chamber; 151. Solid phase discharge pipe; 16. Partition seal; 17. Drum; 1701. Rack; 17011. Protective cover one; 17012. Protective cover two; 17013. Protective cover three; 17014. Moving port; 17015. Drive plate; 1702. Drain hole; 1703. Groove; 1704. Discharge hole; 18. Stuffing box; 19. Stuffing box seal; 20. Push rod bushing; 21. Screen cylinder; 22. Pressure ring; 23. Base plate; 2301. Support column; 24. Pusher plate; 2501. Annular plate 25011. Conical cylinder; 25012. Annular disc; 25013. Vertical cylinder; 2502. Baffle plate; 2503. Base plate; 2504. Feed passage hole two; 2505. Feed passage hole one; 26. Feed passage hole three; 261. Baffle ring; 27. Pushing ring; 28. Bin door plate; 29. ​​Water baffle plate; 30. Feed pipe; 301. Washing pipe one; 3011. Guide pipe; 301 2. Sealing plate; 3013. Water distribution ring; 3014. Water spray nozzle; 3015. Passive bevel gear; 3016. Drive plate; 3017. Drive rod; 3018. Active bevel gear; 3019. Active gear; 302. Bend; 303. Washing hole; 304. Washing pipe II; 33. Inner feed plate; 34. Outer feed plate; 35. Liquid phase water outlet pipe; 36. Inverted conical block. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1: A double-push, double-discharge solid-liquid separation structure for a pusher centrifuge, such as... Figure 1 The centrifuge includes a product chamber 15 and a rotating drum 17 rotatably connected to the product chamber 15 via a drive component, and a screen cylinder 21 located on the inner wall of the rotating drum 17. The longitudinal section of the rotating drum 17 is U-shaped. The opening of the rotating drum 17 is horizontally distributed and there is a gap between it and the vertical wall of the product chamber 15. Several discharge holes 1704 are circumferentially opened on the side of the rotating drum 17 away from the opening. The gap and the discharge holes 1704 facilitate the discharge of solid material in the rotating drum 17. Each discharge hole 1704 is located on one side of the screen cylinder 21. Drainage holes 1702 are evenly distributed along the circumferential direction on the rotating drum 17 to facilitate the discharge of water in the rotating drum 17. The product chamber 15 is the space for the centrifuge to perform solid-liquid separation.

[0025] like Figure 1 It also includes a bidirectional material feeding assembly installed in the screen cylinder 21. The driving component pushes the bidirectional material feeding assembly to reciprocate within the screen cylinder 21. The product chamber 15 is provided with a solid phase discharge pipe 151 below the opening of the drum 17 and below the discharge hole 1704.

[0026] like Figure 1 The drive unit drives the drum 17 to rotate, and the bidirectional feeding assembly feeds the slurry entering the drum 17 in both directions. The drum 17 drives the screen cylinder 21 to rotate. As the screen cylinder 21 rotates, it performs solid-liquid separation on the slurry entering the drum 17. The drive unit pushes the bidirectional feeding assembly to move back and forth in the screen cylinder 21, so that the separated solid material is pushed out into the gap and the discharge hole 1704 as the drive unit pushes the bidirectional feeding assembly to move, and then discharged from the two solid discharge pipes 151 of the product chamber 15, so that the centrifuge discharge direction is bidirectional discharge, improving the discharge efficiency.

[0027] like Figure 1 The product chamber 15 has an installation port on one side wall facing the drum 17. The outer wall of the product chamber 15 is bolted with a door panel 28, which closes the installation port. A feed pipe 30 is fixed on the door panel 28. The feed pipes 30 are horizontally distributed and supply slurry to the bidirectional feeding assembly. The bidirectional feeding assembly is slidably connected to the outer wall of the feed pipe 30, which facilitates the bidirectional feeding assembly to push the material while feeding.

[0028] like Figure 1 The double-push double-outlet solid-liquid separation structure for slurry treatment and the centrifuge also include an oil tank 1 for hydraulic oil, which also functions as the centrifuge base. The oil tank 1 is equipped with a bearing seat 2, which serves as a support for the centrifuge drive component and the product chamber 15. The drive component is mounted on the bearing seat 2, and the product chamber 15 is located at one end of the bearing seat 2.

[0029] like Figure 1 The driving components include a hollow shaft 7 that rotates and a push rod shaft 8 that passes through the hollow shaft 7 and performs horizontal linear and rotational movements. The hollow shaft 7 is rotatably connected to the bearing housing 2. The specific connection structure is as follows: the bearing housing 2 contains a front bearing 4 and a rear bearing 3, which are fixed by the front bearing 4 cover and the rear bearing 3 cover, respectively. The hollow shaft 7 is installed into the front bearing 4 and the rear bearing 3 to facilitate the rotation of the hollow shaft 7. One end of both the hollow shaft 7 and the push rod shaft 8 extends out of the bearing housing 2 and into the product chamber 15. like Figure 1A front axle sleeve and a rear axle sleeve are provided between the hollow shaft 7 and the push rod shaft 8. The front axle sleeve and the rear axle sleeve are fitted over the push rod shaft 8 and are used to support the push rod shaft 8. A bearing seat 2 extends from the end of the hollow shaft 7 away from the drum 17, and a hydraulic cylinder pulley 9 is fixedly installed at the extended end. A hydraulic cylinder cover 10 is installed on the hydraulic cylinder pulley 9. There is a compound piston 11 inside the hydraulic cylinder pulley 9. The compound piston 11 is connected to the push rod shaft 8. Under the action of hydraulic oil, the compound piston 11 automatically switches the direction of the oil circuit and performs reciprocating motion under the action of hydraulic oil, thereby driving the push rod shaft 8 to move horizontally reciprocatingly.

[0030] like Figure 1 The hollow shaft 7 has a guide key on its inner wall, and the push rod shaft 8 has a guide groove on its outer wall for the guide key to slide along the length of the push rod shaft 8.

[0031] like Figure 1 The hydraulic cylinder pulley 9 drives the hollow shaft 7 to rotate within the bearing housing 2. The push rod shaft 8 follows the hollow shaft 7 in rotation via a guide key, and simultaneously reciprocates with the compound piston 11.

[0032] like Figure 1 A partition seal 16 is installed between the bearing housing 2 and the product chamber 15. The partition seal 16 is mounted on the bearing housing 2. The seal between the partition seal 16 and the hollow shaft 7 is a carbon ring seal, which is used to prevent the medium in the product chamber 15 from entering the hydraulic system.

[0033] like Figure 1 and Figure 2 The drum 17 is longer than that of a traditional unidirectional pusher centrifuge. The drum 17 rotates with the hollow shaft 7 and is located inside the product chamber 15. The drum 17 consists of a bottom and a wall. The inner hole on the bottom of the drum 17 is for installing the push rod shaft 8. A stuffing box 18 is installed in the inner hole on the bottom of the drum 17, and a stuffing box seal 19 is installed inside the stuffing box 18. A push rod bushing 20 is fixedly installed on the push rod shaft 8. The stuffing box 18 and the push rod bushing 20 are sealed by the stuffing box seal 19 to reduce liquid leakage.

[0034] like Figure 1 and Figure 5The rotating drum 17 is located at one end of the hollow shaft 7 entering the product chamber 15. One end of the push rod shaft 8 is equipped with a base plate 23 located inside the rotating drum 17. The base plate 23 has several support pillars 2301, such as eight pillars 2301. Each support pillar 2301 has a pusher plate 24 at its end furthest from the base plate 23. A bidirectional feeding assembly is mounted on the pusher plate 24. The outer wall of the pusher plate 24 has a pusher ring 27 that abuts against the inner wall of the screen cylinder 21. The pusher ring 27 pushes the slurry back and forth. The advantage of having a pusher ring 27 is that it reduces the inconvenience and high cost of replacing the pusher plate 24 after wear. Replacing the pusher ring 27 after wear is both convenient and economical.

[0035] like Figure 1 and Figure 5 The bidirectional feeding assembly includes a main feeder and an auxiliary feeder respectively disposed on both sides of the feed plate 24; like Figure 4 and Figure 5 and Figure 7 The main feeder includes a main body slidably connected to the outer wall of the feed pipe 30 and a base plate 2503 disposed on one side of the main body. The main body includes an annular plate 2501 slidably connected to the outer wall of the feed pipe 30 and a conical cylinder 25011 coaxially disposed on one side of the annular plate 2501. The taper of the conical cylinder 25011 gradually moves away from the annular plate 2501. An annular disc 25012 is coaxially disposed at one end of the conical cylinder 25011 away from the annular plate 2501. A vertical cylinder 25013 is coaxially disposed at one end of the annular disc 25012 away from the conical cylinder 25011. The base plate 2503 is mounted on the vertical cylinder 25013 and is distributed directly opposite the annular disc 25012. The base plate 2503 is mounted on the pusher plate 24, thereby mounting the main feeder on the pusher plate 24. like Figure 4 and Figure 5 and Figure 7 The chassis 2503 is provided with several baffles 2502. The angle between the length direction of the baffles 2502 and the radial direction of the chassis 2503 is 20°±3°, which facilitates the flow of slurry along the baffles 2502. One end of each partition 2502 abuts against the wall of the vertical cylinder 25013, and the other end extends toward the center of the chassis 2503. Two partitions 2502 form a group. The outer wall of the vertical cylinder 25013 has a material passage hole 1 2505 between two adjacent groups of partitions 2502. The two ends of the material passage hole 1 2505 are distributed close to two adjacent partitions 2502 respectively. The chassis 2503 has a material passage hole 2504 in each group of partitions 2502. The two ends of the material passage hole 2504 are distributed close to two adjacent partitions 2502 respectively. At this time, the material passage hole 2504 and the material passage hole 1 2505 are distributed alternately and have the same number. The material passage hole 2504 and the material passage hole 1 2505 are distributed close to the screen cylinder 21.

[0036] like Figure 4 and Figure 5 and Figure 7 The auxiliary feeder includes three feed holes 26 on the feed plate 24, which are distributed corresponding to each feed hole 2504. The feed holes 26 are connected to the feed holes 2504. Each feed hole 2504 is distributed close to the inner wall of the vertical cylinder 25013. The outer and inner walls of the vertical cylinder 25013 are distributed close to the edge of the feed plate 24. The feed plate 24 has a retaining ring 261 on the side away from the base plate 2503. The longitudinal section of the retaining ring 261 is L-shaped. The horizontal part of the retaining ring 261 is fixedly connected to the surface of the feed plate 24. The vertical distribution is directly opposite the surface of the feed plate 24. Each feed hole 26 is directly opposite the vertical part of the retaining ring 261.

[0037] like Figure 1 and Figure 4 and Figure 5 and Figure 7 Working principle: After the feed pipe 30 introduces the slurry into the rotating drum 17, the slurry enters between the main body and the base 2503. As the rotating drum 17 and the screen cylinder 21 rotate together, the main body and the base 2503 also rotate. At this time, the slurry enters the space formed by the conical cylinder 25011, the annular disk 25012, the vertical cylinder 25013, and the base 2503 through the feed pipe 30. Part of the slurry flows to one side of the pusher plate 24 through the feed hole 2505, and the other part flows to the other side of the feed plate 24. The liquid flows through the second feed hole 2504 and the third feed hole 26 to the other side of the pusher plate 24, and is then guided by the retaining ring 261 to the screen cylinder 21, achieving bidirectional material distribution on both sides of the pusher plate 24. The second feed hole 2504 and the first feed hole 2505 are spaced apart and have the same number, thus achieving uniform distribution of slurry on both sides of the pusher plate 24. Solid-liquid separation is achieved between the slurry on both sides of the pusher plate 24, and the solid phase material is pushed by the reciprocating pusher plate 24 to the solid phase discharge pipes 151 on both sides of the lower end of the product chamber 15. The pusher plate 24 pushes material in two directions, increasing the pushing efficiency to twice the original level, and the centrifuge output to about twice that of the traditional unidirectional pushing structure.

[0038] The main and auxiliary feeders solved the problem of uneven material distribution, and also resolved the excessive vibration caused by uneven material distribution in the centrifuge. The use of a long rotating drum 17 can reduce the water content of the solid slurry.

[0039] like Figure 1 The product chamber 15 has an outer discharge plate 34 on the side of the screen cylinder 21 away from the hollow shaft 7, and an inner discharge plate 33 on the side of the screen cylinder 21 close to the hollow shaft 7. The two solid discharge pipes 151 on the lower end wall of the product chamber 15 are connected to the outer discharge plate 34 and the inner discharge plate 33 respectively. The outer discharge plate 34 and the inner discharge plate 33 are used to guide the solid slurry and reduce slurry splashing.

[0040] like Figure 1 and Figure 3 The drum 17 has a groove 1703 on one side with the screen cylinder 21, which is larger than the drain hole 1702 and communicates with it. The purpose of the groove 1703 is to accelerate the discharge of the liquid phase. The inner wall of the product chamber 15 is provided with several annular baffles 29, and there is a gap between each baffle and the outer wall of the drum 17. The outer wall of the product chamber 15 is provided with a liquid phase outlet pipe 35 that communicates with the space between adjacent baffles 2502 (e.g., Figure 6 The outer discharge plate 34 and the inner discharge plate 33 are respectively fixed on opposite sides of the two farthest water-blocking plates 29. The outer discharge plate 34 and the inner discharge plate 33 include a semi-arc plate fixed on the water-blocking plate 29 and a baffle plate set at both ends below the semi-arc plate. The bottom of both baffle plates extends into the solid phase discharge pipe 151 to facilitate the flow of slurry.

[0041] like Figure 1 and Figure 3 The inner wall of the drum 17 is provided with an embedding groove for the screen cylinder 21 to be embedded. The screen cylinder 21 is fixed in the drum 17 by a pressure ring 22, which is connected to the side wall of the drum 17 by bolts.

[0042] like Figure 1 and Figure 3 The discharge holes 1704 are located near the bottom of the drum 17. The slurry located inside the pusher plate 24 gradually moves towards the bottom of the drum 17 under the reciprocating motion of the pusher plate 24, and then forms discharge from the discharge holes 1704. The slurry located outside the pusher plate 24 gradually moves towards the pressure ring 22 under the reciprocating motion of the pusher plate 24, and forms discharge after leaving the pressure ring 22.

[0043] like Figure 1 In order to clean the screen cylinders 21 and the drum 17 on both sides of the centrifuge pusher plate 24, a washing pipe 301 is installed inside the feed pipe 30. One end of the washing pipe 301 passes through the pusher plate 24, and the other end is provided with a bent pipe 302 that extends out of the feed pipe 30. The washing pipe 301 has several washing holes 303 on the outer wall of the pusher plate 24. Detergent is introduced through the bent pipe 302 and the washing pipe 301. The detergent is sprayed out through each washing hole 303, which facilitates cleaning the screen cylinders 21 inside the pusher plate 24. like Figure 1 The silo door plate 28 is equipped with a second washing pipe 304. The second washing pipe 304 is located above the feed pipe 30, with one end extending out of the silo door plate 28 and the other end extending towards the screen cylinder 21. The second washing pipe 304 is equipped with several nozzles that spray towards the inner wall of the screen cylinder 21. The second washing pipe 304 on the silo door plate 28 is used to wash the slurry located outside the pusher plate 24 inside the rotating drum 17.

[0044] like Figure 1 The outer wall of the washing pipe 301 is provided with an inverted conical block 36. The side with a larger taper of the inverted conical block 36 is distributed near the pusher plate 24, and the side with a smaller taper is distributed near the feed pipe 30. On the one hand, this can reduce the amount of slurry that passes through the hole in the middle of the pusher plate 24 and enters the drum 17. If this slurry does not pass through the distributor to accelerate and falls directly onto the screen inside the drum 17, it will cause uneven distribution of the slurry and thus cause machine vibration. This inverted conical structure can prevent this phenomenon.

[0045] In addition, such as Figure 8 and Figure 9 and Figure 10 The washing pipe 301 is located at the center of the rotating drum 17 and cannot be sprayed with water close to the screen cylinder 21. Therefore, in order to improve the cleaning effect of the washing pipe 301, a T-shaped guide pipe 3011 is rotatably connected to the end of the washing pipe 301 that passes through the pusher plate 24. That is, the guide pipe 3011 has three openings. The horizontal opening of the guide pipe 3011 is rotatably connected to one end of the washing pipe 301. The openings at both ends of the guide pipe 3011, which are distributed vertically, extend towards the screen cylinder 21. The guide pipe 3011 replaces each washing hole 303. The vertically distributed pipe body of the guide pipe 3011 is fixed to the corresponding support 2301. On one side, the openings at both ends of the guide pipe 3011 distributed vertically are connected by an annular sealing plate 3012 at the end that passes through the support column 2301. A water distribution ring 3013 with a U-shaped longitudinal section is rotatably connected to the outer wall of the sealing plate 3012. At this time, the sealing plate 3012 is equivalent to closing the U-shaped opening of the water distribution ring 3013. One end of the guide pipe 3011 passes through the sealing plate 3012 and water flows into the water distribution ring 3013. Several water spray nozzles 3014 are distributed near the screen cylinder 21 and are arranged circumferentially on the outer wall of the water distribution ring 3013. The rotating drum 17 is provided with a driving component that makes the rotation speed of the water distribution ring 3013 and the sealing plate 3012 different.

[0046] like Figure 8 and Figure 9 and Figure 10 The design purpose of the guide pipe 3011, the sealing plate 3012, and the water distribution ring 3013 is to guide the water in the washing pipe 301 closer to the screen cylinder 21, thereby strengthening the scouring force of the water flow on the inner wall of the screen cylinder 21. The driving component makes the rotation speed of the spray nozzle 3014 different from that of the screen cylinder 21, so as to facilitate the scouring of various positions of the screen cylinder 21. The rotation speed of the drum 17, the screen cylinder 21, the pusher plate 24, the sealing plate 3012, and the guide pipe 3011 are all the same. The position of the washing pipe 301 is fixed. The guide pipe 3011 is rotatably connected to one end of the washing pipe 301, so as to facilitate the support column 2301 to drive the guide pipe 3011 to rotate, and the guide pipe 3011 to drive the sealing plate 3012 to rotate.

[0047] like Figure 8 and Figure 9 and Figure 10 The driving component includes an annular passive bevel gear 3015 coaxially fixed on the side of the water distribution ring 3013 facing the pusher plate 24, a driving plate 3016 on the side of the sealing plate 3012 facing the pusher plate 24, a driving rod 3017 rotatably connected to the driving plate 3016, an active bevel gear 3018 coaxially fixed at one end of the driving rod 3017 and meshing with the passive bevel gear 3015, and an active gear 3019 coaxially fixed at the other end, a rack 1701 meshing with the active gear 3019 on the vertical inner wall of the drum 17, the rack 1701 horizontally located on one side of the active gear 3019, the active bevel gear 3018 and the active gear 3019 are respectively located on both sides of the driving plate 3016 and the rack 1701 is located above the pusher plate 24, there is a gap between the sealing plate 3012 and the support column 2301 and the rack 1701 passes through it.

[0048] like Figure 8 and Figure 9 and Figure 10 The pusher plate 24 and the rotating drum 17 rotate together, making the rotating drum 17 and the sealing plate 3012 rotate at the same speed. This ensures that the rack 1701 and the drive gear 3019 are always meshed and rotate together around the central axis of the rotating drum 17. At this time, the drive bevel gear 3018 also rotates around the central axis of the rotating drum 17. While rotating, the pusher plate 24 moves horizontally back and forth, causing the drive gear 3019 to travel on the rack 1701. This causes the drive gear 3019 and the drive bevel gear 3018 to rotate. The rotating drive bevel gear 3018 drives the driven bevel gear 3015 to rotate, which in turn drives the water distribution ring 3013 to rotate. At this time, the rotation speed of the water distribution ring 3013 is different from that of the sealing plate 3012, which makes it easier for the water spray nozzle 3014 to clean the screen cylinder 21.

[0049] like Figure 8 and Figure 9 and Figure 10A protective cover 17011 is rotatably connected to one side of the water distribution ring 3013, which is disposed outside the driven bevel gear 3015. The longitudinal section of the protective cover 17011 is a U-shape with a horizontal opening, that is, the two opposite sides of the protective cover are rotatably connected to one side of the water distribution ring 3013. A protective cover 2 17012 is fixedly disposed on the protective cover 17011, which covers the driving bevel gear 3018. The protective cover 17011 has a connecting hole for the driving bevel gear 3018 and the driven bevel gear 3015 to mesh. The vertical inner wall of the drum 17 is provided with a cover for the rack 1701 and the driving gear 301. The outer protective cover 17013 has an opening 17014 on its upper surface for the reciprocating movement of the drive gear 3019. A drive plate 17015, which closes the opening 17014, is slidably connected to the inner wall of the protective cover 17013. The drive rod 3017 rotates with the drive plate 17015, and the drive gear 3019 is located inside the protective cover 17013. When the drive gear 3019 reciprocates along the rack 1701, the drive plate 17015 reciprocates along the inner wall of the protective cover 17013, and the opening 17014 remains closed. The design of the protective covers 17011, 17012, and 17013 is for better operation of the drive components.

[0050] Compared with traditional unidirectional pusher centrifuges, this solution makes full use of the reciprocating motion during pushing, avoiding energy loss and improving pushing efficiency.

[0051] The specially designed pusher plate 24 and main and auxiliary feeder structure solve the problem of bidirectional feeding, enabling the centrifuge to operate stably.

[0052] The specially designed feed pipe 30 structure solves the problem of slurry washing inside the drum 17, making the centrifuge have a wider range of applications.

[0053] In addition to its application in slurry treatment, the structure of this solution can also be applied in environmental protection and chemical industries, such as solid-liquid separation in the dehydration of inorganic products like salt, potash fertilizer, and ammonium sulfate. For example, the diameter of the drum 17 in this solution can reach up to 1260mm, and the unit output in the salt industry can reach 140 tons / hour, which is twice that of the original unidirectional push centrifuge.

[0054] Example 2: A pusher centrifuge, comprising the components described in Example 1 above.

[0055] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A double-push, double-discharge solid-liquid separation structure for a pusher centrifuge, characterized in that, Includes a product chamber (15) and a rotating drum (17) rotatably connected to the product chamber (15) via a drive component, and a screen cylinder (21) located on the inner wall of the rotating drum (17). The longitudinal section of the rotating drum (17) is U-shaped. The opening of the rotating drum (17) is horizontally distributed and there is a gap between it and the vertical wall of the product chamber (15). The rotating drum (17) has several discharge holes (1704) on the side away from the opening of the rotating drum (17), and each discharge hole (1704) is located on one side of the screen cylinder (21). It also includes a bidirectional material feeding assembly disposed in the screen cylinder (21), the driving component pushes the bidirectional material feeding assembly to reciprocate within the screen cylinder (21), and the product chamber (15) is provided with a solid phase discharge pipe (151) below the opening of the drum (17) and below the discharge hole (1704). The bidirectional fabric feeding assembly includes a main fabric feeder and an auxiliary fabric feeder respectively disposed on both sides of the pusher plate (24); The main feeder includes a main body slidably connected to the outer wall of the feed pipe (30) and a base plate (2503) disposed on one side of the main body. The main body includes an annular plate (2501) slidably connected to the outer wall of the feed pipe (30) and a conical cylinder (25011) coaxially disposed on one side of the annular plate (25011). The taper of the conical cylinder (25011) gradually moves away from the annular plate (2501). An annular disc (25012) is coaxially disposed at one end of the conical cylinder (25011) away from the annular plate (25011). A vertical cylinder (25013) is coaxially disposed at one end of the annular disc (25012) away from the conical cylinder (25011). The base plate (2503) is mounted on the vertical cylinder (25013) and the base plate (2503) is distributed directly opposite the annular disc (25012). The base plate (2503) is mounted on the pusher plate (24). The chassis (2503) is provided with a plurality of partitions (2502), one end of each partition (2502) abuts against the wall of the vertical cylinder (25013), two partitions (2502) form a group, and a material passage hole (2505) is opened between two adjacent groups of partitions (2502) on the outer wall of the vertical cylinder (25013), and a material passage hole (2504) is opened in each group of partitions (2502) of the chassis (2503). The auxiliary feeder includes three material passages (26) on the feeder plate (24) and distributed corresponding to each material passage two (2504). The material passage three (26) is connected to the material passage two (2504). Each material passage two (2504) is distributed close to the inner wall of the vertical cylinder (25013). The feeder plate (24) is provided with a retaining ring (261) on the side away from the base plate (2503). The longitudinal section of the retaining ring (261) is L-shaped. The horizontal part of the retaining ring (261) is fixedly connected to the surface of the feeder plate (24). The vertical distribution is directly opposite the feeder plate (24). Each material passage three (26) is directly opposite the vertical part of the retaining ring (261).

2. The double-push, double-discharge solid-liquid separation structure for a pusher centrifuge as described in claim 1, characterized in that, The product chamber (15) has an installation port on one side wall facing the opening of the drum (17). A door panel (28) is bolted to the outer wall of the product chamber (15). The door panel (28) closes the installation port. A feed pipe (30) is fixed on the door panel (28). The feed pipe (30) supplies slurry to the bidirectional fabric assembly. The bidirectional fabric assembly is slidably connected to the outer wall of the feed pipe (30).

3. The double-push, double-discharge solid-liquid separation structure for a pusher centrifuge as described in claim 2, characterized in that, It also includes an oil tank (1) for storing hydraulic oil, which also functions as a centrifuge base. The oil tank (1) is equipped with a bearing seat (2), and the drive component is mounted on the bearing seat (2). The driving component includes a hollow shaft (7) that rotates and a push rod shaft (8) that passes through the hollow shaft (7) and moves horizontally and linearly. The hollow shaft (7) is rotatably connected to a bearing seat (2), and one end of both the hollow shaft (7) and the push rod shaft (8) extends out of the bearing seat (2) and into the product chamber (15). The drum (17) is located at one end of the hollow shaft (7) that enters the product chamber (15). One end of the push rod shaft (8) is provided with a base plate (23) located inside the drum (17). The base plate (23) has several support pillars (2301). Each support pillar (2301) has a pusher plate (24) at the end away from the base plate (23). The bidirectional feeding assembly is located on the pusher plate (24). The outer wall of the pusher plate (24) is provided with a pusher ring (27) that abuts against the inner wall of the screen cylinder (21).

4. The double-push, double-discharge solid-liquid separation structure for a pusher centrifuge as described in claim 3, characterized in that, The hollow shaft (7) is rotatably connected to the bearing seat (2), and both ends extend out of the bearing seat (2). The inner wall of the hollow shaft (7) is provided with a guide key. The outer wall of the push rod shaft (8) is provided with a guide groove for the guide key to slide along the length direction of the push rod shaft (8). The drum (17) is provided with evenly distributed drainage holes (1702) along the circumferential direction. The drum (17) is provided with a groove (1703) on the side with the screen cylinder (21) that communicates with the drainage hole (1702) and is larger than the drainage hole (1702). The product chamber (15) has an outer feed plate (34) on the side of the screen cylinder (21) away from the hollow shaft (7) and an inner feed plate (33) on the side of the screen cylinder (21) close to the hollow shaft (7). The two solid discharge pipes (151) on the lower end wall of the product chamber (15) are connected to the outer feed plate (34) and the inner feed plate (33) respectively.

5. The double-push, double-discharge solid-liquid separation structure for a pusher centrifuge as described in claim 4, characterized in that, The inner wall of the product chamber (15) is provided with several annular baffles (29), and each baffle (29) has a gap with the outer wall of the drum (17). The outer wall of the product chamber (15) is provided with a liquid phase water outlet pipe (35) that communicates with the space between the adjacent baffles (2502). The outer feed plate (34) and the inner feed plate (33) are respectively fixed on the opposite side of the two baffles (29) that are furthest apart. The outer feed plate (34) and the inner feed plate (33) include a semi-arc plate fixed on the baffle (29) and a baffle plate set at both ends below the semi-arc plate. The bottom of the two baffle plates extends into the solid phase outlet pipe (151).

6. The double-push, double-discharge solid-liquid separation structure for a pusher centrifuge as described in claim 5, characterized in that, The feed pipe (30) is provided with a washing pipe (301). One end of the washing pipe (301) passes through the pusher plate (24), and the other end is provided with a bent pipe (302) that passes through the feed pipe (30). The washing pipe (301) has several washing holes (303) on its outer wall that passes through the pusher plate (24). The door panel (28) is provided with a second washing pipe (304). The second washing pipe (304) is located above the feed pipe (30), and one end of the second washing pipe (304) extends out of the door panel (28), while the other end extends towards the screen cylinder (21). The second washing pipe (304) is provided with several nozzles that spray towards the inner wall of the screen cylinder (21). The outer wall of the washing tube (301) is provided with an inverted conical block (36). The side of the inverted conical block (36) with a larger taper is distributed near the pusher plate (24), and the side with a smaller taper is distributed near the feed tube (30).

7. The double-push, double-discharge solid-liquid separation structure for a pusher centrifuge as described in claim 6, characterized in that, The washing tube (301) has a T-shaped guide tube (3011) rotatably connected to one end of the tube passing through the pusher plate (24). The guide tube (3011) has openings at both ends that extend towards the screen cylinder (21) in a vertical direction. The guide tube (3011) replaces each washing hole (303). The tube body of the guide tube (3011) is fixed to one side of the corresponding support column (2301). The openings at both ends of the directional distribution are connected by an annular sealing plate (3012) at one end of the column (2301). The outer wall of the sealing plate (3012) is rotatably connected to a water distribution ring (3013) with a U-shaped longitudinal section. The outer wall of the water distribution ring (3013) is distributed close to the screen cylinder (21) and has several water spray nozzles (3014) arranged circumferentially. The rotating drum (17) is provided with a driving component that makes the rotation speed of the water distribution ring (3013) and the sealing plate (3012) different.

8. A pusher centrifuge, comprising the double-push double-outlet solid-liquid separation structure for a pusher centrifuge as described in any one of claims 1-7.

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