Improved thickener

Abstract

The invention provides an improved thickener which comprises a conical container, a feeding pipe is arranged on the middle lower portion of the conical container in a communicating mode, feeding in the tangential direction is completed through the feeding pipe, a material guiding pipe is arranged at the bottom of the conical container in a communicating mode, and a forced circulation pump is arranged on one side of the conical container. The forced circulation pump is communicated with a forced circulation outlet pipe and a forced circulation inlet pipe, the forced circulation outlet pipe is communicated with the material guide pipe, the middle-lower part of the conical container is communicated with a material returning pipe, the material returning pipe is communicated with the forced circulation inlet pipe, a first motor is mounted at the top of the conical container, and a second motor is mounted at the bottom of the conical container. A stirring shaft is movably arranged in the conical container and is driven by the first motor. The problems that an existing thickener is poor in use effect, and a material guide pipeline and a valve at the bottom of the thickener are very prone to hardening and blocking are solved.

Description

Technical Field

[0001] The invention relates to the field of mechanical equipment, and in particular to an improved thickener. Background Art

[0002] Thickeners currently used in the field of inorganic salt and inorganic alkali chemicals are mainly used for the preliminary solid-liquid separation of supersaturated slurry liquid. The structure is usually a conical liquid container with a frame agitator at the bottom. The principle of gravity sedimentation is used to achieve preliminary solid-liquid separation. The upper clarified liquid (supernatant) overflows back into the production system, and the solids (crystals) settle by gravity at the bottom of the conical container. The rotation of the frame agitator prevents the solids (crystals) at the bottom from compacting. A large amount of loosely stirred solids (crystals) are discharged together with a small amount of liquid (thick liquid) to the next solid-liquid separation equipment (centrifuge).

[0003] This type of thickener is only suitable for chemical production processes where the density of the solid (crystallization) is much greater than the density of the liquid, the viscosity of the liquid is not high, and the solid is not easy to agglomerate. However, the density of most inorganic salt supersaturated slurry liquids is very high, and the viscosity is also very high. If the density of the solid (crystallization) is not large enough, the solid cannot settle by gravity. Therefore, in reality, the effect of using thickeners in the production of quite a few inorganic salts and inorganic bases is very poor, and even the supernatant and thick liquid cannot be separated at all, resulting in a very large processing capacity of the next separation equipment (centrifuge), very high energy consumption, and half or even less production capacity. If the working conditions do not allow the thickener to discharge continuously, the guide pipes and valves at the bottom of the thickener are very easy to become clogged and must be stopped for cleaning, which seriously affects production.

[0004] Therefore, it is necessary to provide a new improved thickener to solve the above technical problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an improved thickener, which solves the problems that the existing thickener has poor use effect and the material guide pipe and valve at the bottom of the thickener are very easy to be hardened and blocked.

[0006] The improved thickener provided by the present invention comprises a conical container, wherein a feed pipe is connected to the middle and lower part of the conical container, and tangential feeding is completed through the feed pipe, a material guide pipe is connected to the bottom of the conical container, a forced circulation pump is provided on one side of the conical container, and a forced circulation outlet pipe and a forced circulation inlet pipe are connected to the forced circulation pump; The forced circulation outlet pipe is connected to the material guide pipe, and a return pipe is provided in the middle and lower part of the conical container, and the return pipe is connected to the forced circulation inlet pipe.

[0007] In a preferred embodiment, the material guide pipe is connected to a material discharge valve to prevent blocking.

[0008] In a preferred embodiment, a first motor is installed on the top of the conical container, and a stirring shaft is movably arranged inside the conical container, and the stirring shaft is driven by the first motor; A plurality of support columns are symmetrically fixed on the stirring shaft, a mounting groove is provided inside the support column, a sliding seat is slidably provided inside the mounting groove, a sliding shaft is slidably provided at one end of the support column, one end of the sliding shaft is slidably connected to the sliding seat, and a scraping and stirring plate is fixed at the other end of the sliding shaft; A spring is arranged inside the installation groove, one end of the spring is fixedly connected to the support column, and the other end of the spring is fixed to one side of the slide seat.

[0009] In a preferred embodiment, a mounting shaft is fixed to the bottom of the stirring shaft, the mounting shaft extends into the interior of the material guide pipe, and a first auger blade is fixed to the mounting shaft.

[0010] In a preferred embodiment, a semicircular coil is disposed outside the conical container, and a steam inlet and a steam outlet are connected to the semicircular coil.

[0011] In a preferred embodiment, a manhole is provided at the top of the conical container, and a discharge port is provided at the forced circulation inlet pipe.

[0012] In a preferred embodiment, an overflow trough is provided at the top of the conical container, and a mother liquid overflow pipe is provided on one side of the top of the conical container; A stand is fixed inside the conical container, a first rotating shaft is movably arranged at the stand, one end of the first rotating shaft is connected to a second rotating shaft, and a plurality of accelerating blades are installed on the second rotating shaft.

[0013] In a preferred embodiment, a second auger blade is mounted on the first rotating shaft.

[0014] In a preferred embodiment, a first bevel gear is installed on the second rotating shaft, a side seat is fixed on one side of the vertical seat, a transmission shaft is movably provided on the side seat, a second bevel gear is installed on the transmission shaft, the second bevel gear is meshed with the first bevel gear, a second motor is installed on the top of the conical container, and the transmission shaft is driven by the second motor.

[0015] In a preferred embodiment, a closed transmission is adopted between the first bevel gear and the second bevel gear.

[0016] Beneficial effects of the present invention: 1. The present invention changes the conventional thickener from a top feeding method to a tangential feeding method in the middle and lower part of the conical container, and adds a forced circulation pump, a forced circulation outlet pipe and a forced circulation inlet pipe, so that the solid content at the bottom of the conical container can be continuously increased to form a stable thick liquid with a high solid content; At the same time, since the forced circulation inlet pipe is connected to the outlet of the forced circulation pump, it has a certain pressure and circulates continuously. Therefore, no matter whether the material is discharged continuously or intermittently, the thick liquid with high solid content will not block the forced circulation outlet pipe, the forced circulation inlet pipe and the discharge port. Because the dual effects of centrifugal force and gravity force the solid (crystallization) to be repeatedly thrown to the wall of the conical container and sink to the bottom, the solid content of the liquid in the upper part of the conical container is very low, forming a stable supernatant, which overflows into the overflow tank and is discharged from the mother liquid overflow pipe. The thick liquid with high solid content is discharged from the discharge port, completing the continuous and stable separation of the supernatant and the thick liquid. The forced circulation pump only needs to overcome the resistance of the material flow, so it only needs to be equipped with a very small power motor, which greatly saves energy. 2. The purpose of the frame agitator can be achieved by setting the stirring shaft, support column and scraper plate. Since high-viscosity materials are prone to accumulation and sedimentation under the condition of poor fluidity, the stirring shaft drives the support column and scraper plate to rotate, which can provide the necessary shear force to promote the flow and transportation of materials, so that the materials can be evenly distributed in the conical container to avoid retention; 3. When it is necessary to remove the crystallization and hardening on the inner wall of the conical container, the staff only needs to add cleaning liquid into the conical container, and then quickly start the first motor to drive the stirring shaft to rotate rapidly. Under the action of centrifugal force, the sliding shaft drives the scraper plate to move toward the inner wall of the conical container. When the scraper plate contacts the inner wall of the conical container, the crystallization and hardening attached to the inner wall of the conical container will be scraped off to achieve the purpose of rapid cleaning. When not cleaning, the first rotating shaft rotates at a low speed. At this time, under the action of the spring, a gap of several centimeters is left between the inner wall of the conical container and the scraper plate to ensure that the first rotating shaft can rotate normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The main structure of the improved thickener provided by the present invention is a three-dimensional view Figure 1 ; Figure 2 The main structure of the improved thickener provided by the present invention is a three-dimensional view Figure 2 ; Figure 3 A front view of the main structure of the improved thickener provided by the present invention; Figure 4 for Figure 3 A schematic diagram of the enlarged structure of shown; Figure 5 A structural view of the support column provided by the present invention.

[0018] Numbers in the figure: 1. conical container; 2. feed pipe; 3. material guide pipe; 4. forced circulation pump; 5. forced circulation outlet pipe; 6. forced circulation inlet pipe; 7. return pipe; 8. anti-blocking discharge valve; 9. first motor; 10. stirring shaft; 11. support column; 12. mounting groove; 13. slide seat; 14. slide shaft; 15. scraper plate; 16. spring; 17. mounting shaft; 18. first auger blade; 19. semicircular coil; 20. steam inlet; 21. steam outlet; 22. manhole; 23. discharge port; 24. overflow trough; 25. mother liquor overflow pipe; 26. stand; 27. first rotating shaft; 28. second rotating shaft; 29. ​​acceleration blade; 30. second auger blade; 31. first bevel gear; 32. side seat; 33. transmission shaft; 34. second bevel gear; 35. second motor. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0020] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 ,in Figure 1 The main structure of the improved thickener provided by the present invention is a three-dimensional view Figure 1 ; Figure 2 The main structure of the improved thickener provided by the present invention is a three-dimensional view Figure 2 ; Figure 3 A front view of the main structure of the improved thickener provided by the present invention; Figure 4 for Figure 3 A schematic diagram of the enlarged structure of shown; Figure 5 A structural view of the support column provided by the present invention.

[0021] In the specific implementation process, Figure 1-Figure 5 As shown, it includes a conical container 1, a feed pipe 2 is connected to the middle and lower part of the conical container 1, and tangential feeding is completed through the feed pipe 2. A material guide pipe 3 is connected to the bottom of the conical container 1, and an anti-blocking discharge valve 8 is connected to the material guide pipe 3. A manhole 22 is arranged at the top of the conical container 1, and a discharge port 23 is arranged at the forced circulation inlet pipe 6.

[0022] A forced circulation pump 4 is provided on one side of the conical container 1, and a forced circulation outlet pipe 5 and a forced circulation inlet pipe 6 are connected to the forced circulation pump 4, and the forced circulation outlet pipe 5 is connected to the material guide pipe 3, and a return pipe 7 is connected to the middle and lower part of the conical container 1, and the return pipe 7 is connected to the forced circulation inlet pipe 6. The present invention changes the conventional thickener from a top feeding mode to a tangential feeding mode in the middle and lower part of the conical container 1, and adds a forced circulation pump 4, a forced circulation outlet pipe 5 and a forced circulation inlet pipe 6, and the forced circulation inlet pipe 6 is also connected to the middle and lower part of the conical container 1 in a tangential direction, and cooperates with The height and flow direction of the feed pipe can force the material to rotate and flow in the conical container 1. The centrifugal force generated by the rotating flow of the material throws the crystals in the material to the side wall of the conical container 1. The crystals sink to the bottom of the conical container 1 due to the dual effects of centrifugal force and gravity, and re-enter the forced circulation outlet pipe 5 through the forced circulation outlet pipe 5, and are forced to circulate again through the forced circulation pump 4 and the forced circulation inlet pipe 6, and rotate and flow again in the conical container 1. The infinite rotation and centrifugation can be repeated over and over again, which can continuously increase the solid content at the bottom of the conical container 1 to form a stable thick liquid with high solid content.

[0023] At the same time, since the forced circulation inlet pipe 6 is connected to the outlet of the forced circulation pump 4, it has a certain pressure and circulates continuously. Therefore, no matter whether the discharge is continuous or intermittent, the thick liquid with high solid content will not block the forced circulation outlet pipe 5, the forced circulation inlet pipe 6 and the discharge port 23. Because the dual effects of centrifugal force and gravity force the solids (crystals) to be repeatedly thrown to the wall of the conical container and sink to the bottom, the solid content of the liquid in the upper part of the conical container is very low, forming a stable supernatant, and overflowing into the overflow tank 24, and discharged from the mother liquor overflow pipe 25, the thick liquid with high solid content is discharged from the discharge port 23, completing the continuous and stable separation of the supernatant and the thick liquid. The forced circulation pump only needs to overcome the resistance of the material flow, so it only needs to be equipped with a very small power motor, which greatly saves energy.

[0024] A first motor 9 is installed on the top of the conical container 1, and a stirring shaft 10 is movably arranged inside the conical container 1, and the stirring shaft 10 is driven by the first motor 9. A plurality of support columns 11 are symmetrically fixed on the stirring shaft 10, and a mounting groove 12 is opened inside the support column 11, and a slide seat 13 is slidably arranged inside the mounting groove 12. A sliding shaft 14 is slidably arranged at one end of the support column 11, and one end of the sliding shaft 14 is slidably connected to the slide seat 13, and a scraping plate 15 is fixed at the other end of the sliding shaft 14. A spring 16 is arranged inside the mounting groove 12, and one end of the spring 16 is fixedly connected to the support column 11, and the other end of the spring 16 is fixed to one side of the slide seat 13. By arranging the stirring shaft 10, the support column 11 and the scraping plate 15, the purpose of the frame agitator can be achieved. Since high-viscosity materials are prone to accumulation and sedimentation when they have poor fluidity, the stirring shaft 10 drives the support column 11 and the scraping plate 15 to rotate, which can provide necessary shear force to promote the flow and transportation of materials, so that the materials can be evenly distributed in the conical container 1 to avoid retention.

[0025] When it is necessary to remove the crystallization and hardening on the inner wall of the conical container 1, the staff only needs to add cleaning liquid into the conical container, and then quickly start the first motor 9 to drive the stirring shaft 10 to rotate rapidly. When the stirring shaft 10 rotates rapidly, under the action of centrifugal force, the sliding shaft 14 drives the scraping plate 15 to move toward the inner wall of the conical container 1. When the sliding seat 13 contacts the groove wall of the mounting groove 12, the scraping plate 15 contacts the inner wall of the conical container 1, and then the crystallization and hardening attached to the inner wall of the conical container 1 are scraped off to achieve the purpose of rapid cleaning. When no cleaning is performed, the first rotating shaft 27 rotates at a low speed. At this time, under the action of the spring 16, a gap of several centimeters is left between the inner wall of the conical container 1 and the scraping plate 15 to ensure that the first rotating shaft 27 can rotate normally.

[0026] A mounting shaft 17 is fixed at the bottom of the stirring shaft 10 , and the mounting shaft 17 extends into the interior of the material guide pipe 3 . A first auger blade 18 is fixed on the mounting shaft 17 to prevent solid crystals that are continuously deposited at the bottom of the conical container 1 from clogging.

[0027] A semicircular coil 19 is disposed outside the conical container 1 , and a steam inlet 20 and a steam outlet 21 are connected to the semicircular coil 19 . Steam can be introduced into the semicircular coil 19 through the steam inlet 20 and the steam outlet 21 , thereby heating the conical container 1 .

[0028] An overflow trough 24 is arranged at the top of the conical container 1, a mother liquor overflow pipe 25 is connected to one side of the top of the conical container 1, a stand 26 is fixed inside the conical container 1, a first rotating shaft 27 is movably arranged at the stand 26, one end of the first rotating shaft 27 is connected to a second rotating shaft 28, a plurality of accelerating blades 29 are installed on the second rotating shaft 28, a second auger blade 30 is installed on the first rotating shaft 27, a first bevel gear 31 is installed on the second rotating shaft 28, a side seat 32 is fixed at one side of the stand 26, a transmission shaft 33 is movably arranged on the side seat 32, a second bevel gear 34 is installed on the transmission shaft 33, the second bevel gear 34 is meshed with the first bevel gear 31, a closed transmission is adopted between the first bevel gear 31 and the second bevel gear 34, so as to improve their service life.

[0029] A second motor 35 is installed on the top of the conical container 1, and the transmission shaft 33 is driven by the second motor 35. When the second motor 35 is started, the transmission shaft 33 is driven to rotate. Under the transmission action of the first bevel gear 31 and the second bevel gear 34, the first rotating shaft 27 and the second rotating shaft 28 will rotate accordingly. At this time, the multiple acceleration blades 29 can greatly speed up the speed at which the supernatant flows into the mother liquor overflow pipe 25. At the same time, the second auger blades 30 can prevent continuous deposition and blockage of the mother liquor overflow pipe 25.

[0030] Working principle of the present invention: The present invention changes the conventional thickener from a top feeding mode to a tangential feeding mode at the middle and lower part of the conical container 1, and adds a forced circulation pump 4, a forced circulation outlet pipe 5 and a forced circulation inlet pipe 6. The forced circulation inlet pipe 6 is also connected to the middle and lower part of the conical container 1 in a tangential direction. In combination with the height and flow direction of the feeding pipeline, the material can be forced to rotate and flow in the conical container 1. The centrifugal force generated when the material rotates and flows throws the crystals in the material toward the side wall of the conical container 1. The crystals sink to the bottom of the conical container 1 due to the dual effects of centrifugal force and gravity, and re-enter the forced circulation outlet pipe 5 through the forced circulation outlet pipe 5, are forced to circulate again through the forced circulation pump 4 and the forced circulation inlet pipe 6, and rotate and flow again in the conical container 1. The infinite rotation and centrifugation are repeated over and over again, so that the solid content at the bottom of the conical container 1 is continuously increased to form a stable thick liquid with a high solid content. At the same time, since the forced circulation inlet pipe 6 is connected to the outlet of the forced circulation pump 4, it has a certain pressure and circulates continuously. Therefore, no matter whether the material is discharged continuously or intermittently, the thick liquid with high solid content will not block the forced circulation outlet pipe 5, the forced circulation inlet pipe 6 and the discharge port 23. Because the dual effects of centrifugal force and gravity force the solid (crystallization) to be repeatedly thrown to the wall of the conical container and sink to the bottom, the solid content of the liquid in the upper part of the conical container is very low, forming a stable supernatant, and overflowing into the overflow tank 24, and discharged from the mother liquid overflow pipe 25, the thick liquid with high solid content is discharged from the discharge port 23, completing the continuous and stable separation of the supernatant and the thick liquid. The forced circulation pump only needs to overcome the resistance of the material flow, so it only needs to be equipped with a very small power motor, which greatly saves energy. The purpose of the frame agitator can be achieved by providing the stirring shaft 10, the support column 11 and the scraper plate 15. Since high-viscosity materials are prone to accumulation and sedimentation when they have poor fluidity, the stirring shaft 10 drives the support column 11 and the scraper plate 15 to rotate, which can provide the necessary shear force to promote the flow and transportation of the materials, so that the materials can be evenly distributed in the conical container 1 to avoid retention. When it is necessary to remove the crystallization and hardening on the inner wall of the conical container 1, the staff only needs to add cleaning liquid into the conical container, and then quickly start the first motor 9 to drive the stirring shaft 10 to rotate rapidly. When the stirring shaft 10 rotates rapidly, under the action of centrifugal force, the sliding shaft 14 drives the scraping and stirring plate 15 to move toward the inner wall of the conical container 1. When the sliding seat 13 contacts the groove wall of the installation groove 12, the scraping and stirring plate 15 contacts the inner wall of the conical container 1, and then the crystallization and hardening attached to the inner wall of the conical container 1 are scraped off, so as to achieve the purpose of rapid cleaning. When no cleaning is performed, the first rotating shaft 27 rotates at a low speed. At this time, under the action of the spring 16, a gap of several centimeters is left between the inner wall of the conical container 1 and the scraping and stirring plate 15, so as to ensure that the first rotating shaft 27 can rotate normally. Start the second motor 35 to drive the transmission shaft 33 to rotate. Under the transmission action of the first bevel gear 31 and the second bevel gear 34, the first rotating shaft 27 and the second rotating shaft 28 will rotate accordingly. At this time, the multiple acceleration blades 29 can greatly increase the speed at which the supernatant flows into the mother liquor overflow pipe 25. At the same time, the second auger blade 30 can prevent continuous deposition and blockage of the mother liquor overflow pipe 25.

[0031] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0032] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An improved thickener, comprising a conical container (1), characterized in that: A feed pipe (2) is provided in communication with the middle and lower part of the conical container (1), and tangential feeding is completed through the feed pipe (2). A material guide pipe (3) is provided in communication with the bottom of the conical container (1). A forced circulation pump (4) is provided on one side of the conical container (1), and a forced circulation outlet pipe (5) and a forced circulation inlet pipe (6) are provided in communication with the forced circulation pump (4). The forced circulation outlet pipe (5) is connected to the material guide pipe (3), and a return pipe (7) is provided in the middle and lower part of the conical container (1), and the return pipe (7) is connected to the forced circulation inlet pipe (6).

2. The improved thickener according to claim 1, characterized in that: The material guide pipe (3) is connected to a material discharge valve (8) to prevent blocking.

3. The improved thickener according to claim 2, characterized in that: A first motor (9) is installed on the top of the conical container (1), and a stirring shaft (10) is movably arranged inside the conical container (1), and the stirring shaft (10) is driven by the first motor (9); A plurality of support columns (11) are symmetrically fixed on the stirring shaft (10), a mounting groove (12) is provided inside the support column (11), a sliding seat (13) is slidably provided inside the mounting groove (12), a sliding shaft (14) is slidably provided at one end of the support column (11), one end of the sliding shaft (14) is slidably connected to the sliding seat (13), and a scraping and stirring plate (15) is fixed to the other end of the sliding shaft (14); A spring (16) is arranged inside the mounting groove (12); one end of the spring (16) is fixedly connected to the support column (11), and the other end of the spring (16) is fixed to one side of the slide seat (13).

4. The improved thickener according to claim 3, characterized in that: A mounting shaft (17) is fixed to the bottom of the stirring shaft (10), the mounting shaft (17) extends into the interior of the material guide pipe (3), and a first auger blade (18) is fixed to the mounting shaft (17).

5. The improved thickener according to claim 4, characterized in that: A semicircular coil (19) is arranged outside the conical container (1), and a steam inlet (20) and a steam outlet (21) are arranged in communication at the semicircular coil (19).

6. The improved thickener according to claim 5, characterized in that: A manhole (22) is provided at the top of the conical container (1), and a discharge port (23) is provided at the forced circulation inlet pipe (6).

7. The improved thickener according to claim 6, characterized in that: An overflow trough (24) is provided at the top of the conical container (1), and a mother liquid overflow pipe (25) is provided on one side of the top of the conical container (1); A stand (26) is fixed inside the conical container (1), a first rotating shaft (27) is movably arranged at the stand (26), one end of the first rotating shaft (27) is connected to a second rotating shaft (28), and a plurality of accelerating blades (29) are mounted on the second rotating shaft (28).

8. The improved thickener according to claim 7, characterized in that: A second auger blade (30) is mounted on the first rotating shaft (27).

9. The improved thickener according to claim 8, characterized in that: A first bevel gear (31) is mounted on the second rotating shaft (28); a side seat (32) is fixed to one side of the stand (26); a transmission shaft (33) is movably arranged on the side seat (32); a second bevel gear (34) is mounted on the transmission shaft (33); the second bevel gear (34) is meshed with the first bevel gear (31); a second motor (35) is mounted on the top of the conical container (1); and the transmission shaft (33) is driven by the second motor (35).

10. The improved thickener according to claim 9, characterized in that: A closed transmission is adopted between the first bevel gear (31) and the second bevel gear (34).

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