Three-phase separation device based on low-temperature crystallization

Abstract

The invention provides a three-phase separation device based on low-temperature crystallization, and relates to the technical field of crystallization separation, the three-phase separation device comprises a device bottom plate and a crystal solid-liquid separation assembly, a crystallizer is fixedly installed on the surface of the upper end of the device bottom plate, and the lower end of the crystallizer is connected with a crystallization mixed liquid feeding pipe; the lower end of the crystallization mixed liquid feeding pipe is connected to the crystal solid-liquid separation assembly, and the crystal solid-liquid separation assembly is fixedly installed on the surface of the upper end of the device bottom plate. Gas in the second gas-phase collecting tank is firstly introduced into the first gas-phase collecting tank, a phase-change secondary refrigerant is introduced through the phase-change secondary refrigerant inlet pipe and the phase-change secondary refrigerant outlet pipe which are connected with the side face of the cooling cover, the gas is cooled, then the low-temperature gas is introduced into the crystallizer through the crystallization feeding pipe, and after crystals are separated out, the phase-change secondary refrigerant is discharged through the phase-change secondary refrigerant inlet pipe and the phase-change secondary refrigerant outlet pipe. The densities of liquid substances passing through the liquid extraction separation tank are different, the liquid substances are taken out through the two liquid layering discharge pipes after layering, the whole separation process is very continuous, and the processing efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of crystallization separation, and particularly to a three-phase separation device based on low-temperature crystallization. Background Art

[0002] In many industries such as chemical engineering, environmental protection, and food, it is often necessary to separate a mixture into three phases (such as solid phase, liquid phase, and gas phase). Traditional separation methods have problems such as low efficiency, incomplete separation, and high energy consumption when dealing with some complex systems or specific substances. For example, for some substances with similar densities or solubilities, it is difficult to achieve precise three-phase separation by conventional means. Moreover, in the process of solid-liquid separation, it is very difficult to continuously separate and process the original liquid. It is necessary to batch-process the original liquid for separation, and finally take out the solid phase and liquid phase respectively, with very low efficiency. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a three-phase separation device based on low-temperature crystallization, which solves the problems raised in the background art.

[0004] To achieve the above object, the present invention is realized through the following technical solutions: A three-phase separation device based on low-temperature crystallization, including a device bottom plate and a crystal solid-liquid separation component. The upper surface of the device bottom plate is fixedly installed with a crystallizer. The lower end of the crystallizer is connected with a crystallized mixed liquid feed pipe, and the lower end of the crystallized mixed liquid feed pipe is connected to the crystal solid-liquid separation component. The crystal solid-liquid separation component is fixedly installed on the upper surface of the device bottom plate; The lower end of the crystal solid-liquid separation component is connected with a liquid discharge tank. One end of the liquid discharge tank is connected with a liquid separation tank. One end of the liquid separation tank is connected with a liquid separation tank discharge pipe. The upper end of the liquid separation tank discharge pipe is connected with a liquid extraction and separation tank. The lower end of the liquid extraction and separation tank is provided with a liquid separation tank support. Two liquid stratification discharge pipes are arranged on the side of the liquid extraction and separation tank.

[0005] Preferably, a crystallizer support is fixedly installed at the lower end of the crystallizer. A crystallizer feeding pipe and a crystallization feed pipe are arranged at the upper end of the crystallizer. One end of the crystallization feed pipe is connected with a first gas-phase collection tank. One end of the first gas-phase collection tank is connected with a collection tank connecting pipe. One end of the collection tank connecting pipe is connected with a second gas-phase collection tank.

[0006] Preferably, a cooling cover is arranged outside the first gas-phase collection tank. One side of the cooling cover is respectively connected with a phase-change carrier refrigerant inlet pipe and a phase-change carrier refrigerant outlet pipe; A first gas-phase collection tank support is arranged at the lower end of the first gas-phase collection tank. A second gas-phase collection tank support is arranged at the lower end of the second gas-phase collection tank.

[0007] Preferably, the crystal solid-liquid separation assembly includes: a solid-liquid separation assembly housing, a housing base of the assembly, a centrifugal separation motor, a centrifugal separation main shaft, a centrifugal separation cylinder group, a debris screen, a raw liquid inlet, a separation cylinder limiting rotation groove, a crystal isolation cover, a liquid discharge funnel, and a crystal discharge port; A housing base of the assembly is provided at the outer end of the solid-liquid separation assembly housing. A centrifugal separation motor is fixedly installed at the top end of the solid-liquid separation assembly housing. A centrifugal separation main shaft is coaxially and fixedly connected to the output shaft of the centrifugal separation motor. A centrifugal separation cylinder group is coaxially arranged at the lower end of the centrifugal separation main shaft; A separation cylinder limiting rotation groove is provided on the inner wall of the solid-liquid separation assembly housing. A debris screen is provided above the separation cylinder limiting rotation groove. A crystal isolation cover is also provided on the centrifugal separation main shaft. A raw liquid inlet is integrally provided on the side of the solid-liquid separation assembly housing. A crystal discharge port is also opened on the side of the solid-liquid separation assembly housing.

[0008] Preferably, a plurality of crystal pushing plates are provided on the outer side of the centrifugal separation cylinder group. A crystal isolation ring seat is provided at the bottom end inside the centrifugal separation cylinder group.

[0009] Preferably, a separation cylinder bottom plate is provided on the inner wall of the solid-liquid separation assembly housing and below the centrifugal separation cylinder group. A crystal blocking ring is fixedly installed at the lower end of the centrifugal separation cylinder group. A rubber sealing ring is provided at the outer end of the crystal blocking ring. A liquid return groove is opened on the upper surface of the separation cylinder bottom plate. A crystal sliding blocking ring is integrally provided at the lower end of the crystal blocking ring and located in the liquid return groove; A liquid discharge port is opened on the upper surface of the separation cylinder bottom plate and between the crystal blocking ring and the crystal isolation ring seat.

[0010] Preferably, the centrifugal separation cylinder group includes: a separation cylinder shell, a separation cylinder drainage ring, a crystal extraction port, a crystal centrifugal lifting pipeline, and a liquid level control member; A separation cylinder drainage ring is integrally provided at the upper end of the separation cylinder shell. A crystal extraction port is opened on the side of the separation cylinder shell. A crystal centrifugal lifting pipeline is integrally provided on the inner wall of the separation cylinder shell. A liquid level control member is fixedly installed below the top end of the crystal centrifugal lifting pipeline.

[0011] Preferably, the liquid level control member includes: a control member housing, a sealing plate lifting groove, a control sealing plate, a liquid level lifting rod, a mis-touch limiting sliding groove, a synchronous lifting rod, and a liquid level buoyancy ball; A sealing plate lifting groove is opened at the upper end of the control member housing. A control sealing plate is slidably arranged in the sealing plate lifting groove. A synchronous lifting rod is fixedly connected to the inner side of the control sealing plate. A liquid level lifting rod is slidably inserted through the lower end of the control member housing; A liquid level buoyancy ball is fixedly installed at the lower end of the liquid level lifting rod, and a mis-touch limit chute is provided at the upper end of the liquid level lifting rod.

[0012] Preferably, the synchronous lifting rod is arranged in the mis-touch limit chute.

[0013] Preferably, a sealing plate limit groove is integrally arranged on the inner wall of the control part housing. The front end of the synchronous lifting rod is fixedly connected with a limit spring cylinder. A spring bottom plate is slidably arranged in the limit spring cylinder. A limit clamping head is integrally arranged at the front end of the spring bottom plate. A limit spring is arranged at the rear end of the spring bottom plate.

[0014] The present invention provides a three-phase separation device based on low-temperature crystallization, having the following beneficial effects: (1) In the present invention, the gas in the second gas collection tank is first passed to the first gas collection tank. The phase change coolant is connected through the phase change coolant inlet pipe and the phase change coolant outlet pipe connected to the side of the cooling cover to cool the gas therein. Subsequently, the low-temperature gas is passed to the crystallizer through the crystallization feed pipe, and materials are added through the crystallizer feed pipe, so that the gas crystallizes inside and the remaining condenses into a liquid. Subsequently, the liquid is pumped into the crystal solid-liquid separation assembly through the crystallization mixed liquid feed pipe. After the crystals are separated, the remaining liquid is connected through the liquid discharge tank, and after passing through the separation tank, the different densities of the liquid substances in the liquid extraction and separation tank cause stratification, and then they are respectively taken out through two liquid stratification discharge pipes. The whole separation process is very continuous, greatly improving the processing efficiency; (2) In the present invention, the original liquid is passed through the original liquid inlet to the inside of the solid-liquid separation assembly housing through the crystallization mixed liquid feed pipe. By starting the centrifugal separation motor, the centrifugal separation main shaft can be driven to rotate, and the centrifugal separation cylinder group can be driven to rotate. Through the centrifugal force during rotation, the crystallized solids are extracted. When they fall between the centrifugal separation cylinder group and the solid-liquid separation assembly housing, they are pushed out through the crystal discharge port by the crystal pushing plate, while the liquid falls to the liquid discharge port through the gap between the crystal isolation cover and the crystal isolation ring seat and is discharged through the liquid discharge funnel. Among them, the crystal isolation cover can prevent the crystals falling from above from directly falling into the liquid discharge port; (3) In the present invention, the separation cylinder shell is driven to rotate by the centrifugal separation main shaft. After the crystals are thrown to the edge by the centrifugal force, they enter the crystal centrifugal lifting pipeline. Through the centrifugal force and the rotational force, the crystals continuously move in the crystal centrifugal lifting pipeline. When moving to the crystal extraction port, they fall between the centrifugal separation cylinder group and the solid-liquid separation assembly housing; (4) In the present invention, by separating the height of the liquid level inside the cylinder shell, the height of the liquid level buoyancy ball is controlled. When the liquid level is too high, the buoyancy brought by the liquid pushes the liquid level buoyancy ball upward, and through the liquid level lifting rod, the synchronous lifting rod is pushed, so that the control sealing plate on one side can be pushed to slide upward, preventing excessive liquid from flowing out of the crystal extraction port when the liquid level is too high and unable to flow back through the gap between the crystal sliding retaining ring and the liquid return groove. When the liquid level reaches a certain height, the synchronous lifting rod will carry the limiting spring cylinder at one end and the sliding limiting chuck inside it to be stuck in the sealing plate limiting groove. The misaligned limiting chute provides a margin for the fluctuations brought by the rotation of the liquid. After sealing, the liquid is first drained through the crystal isolation cover and the crystal isolation ring seat. When the liquid level returns, the suspended liquid level buoyancy ball can pull the limiting chuck out of the sealing plate limiting groove due to its own weight, enabling continuous separation and crystallization. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the structure from another perspective in the present invention; Figure 3 is a schematic diagram of the structure of the crystal solid-liquid separation component in the present invention; Figure 4 is a front view schematic diagram of the crystal solid-liquid separation component in the present invention; Figure 5 For the present invention Figure 4 is a schematic cross-sectional structure diagram of the a-a line in; Figure 6 is a side view schematic diagram of the crystal solid-liquid separation component in the present invention; Figure 7 For the present invention Figure 6 is a schematic cross-sectional structure diagram of the b-b line in; Figure 8 For the present invention Figure 7 is an enlarged schematic diagram of the structure at A in; Figure 9 is a schematic diagram of the structure of the centrifugal separation cylinder group in the present invention; Figure 10 is a side view schematic diagram of the centrifugal separation cylinder group in the present invention; Figure 11 For the present invention Figure 10 is a schematic cross-sectional structure diagram of the c-c line in; Figure 12 is a schematic diagram of the structure of the liquid level control member in the present invention; Figure 13 is a side view schematic diagram of the liquid level control member in the present invention; Figure 14 For the present invention Figure 13Schematic cross-sectional structure diagram of the d-d line in the middle; Figure 15 For the present invention Figure 14 Schematic enlarged structure diagram at position B in the middle.

[0016] Wherein, 1. Device bottom plate; 2. Crystal solid-liquid separation component; 201. Solid-liquid separation component housing; 202. Component housing base; 203. Centrifugal separation motor; 204. Centrifugal separation main shaft; 205. Centrifugal separation cylinder group; 2051. Separation cylinder shell; 2052. Separation cylinder drainage ring; 2053. Crystal extraction port; 2054. Crystal centrifugal lifting pipeline; 2055. Liquid level control part; 2056. Control part housing; 2057. Sealing plate lifting groove; 2058. Control sealing plate; 2059. Liquid level lifting rod; 20510. False touch limit chute; 20511. Synchronous lifting rod; 20512. Sealing plate limit groove; 20513. Liquid level buoyancy ball; 20514. Limit spring cylinder; 20515. Spring bottom plate; 20516. Limit clamping head; 20517. Limit spring; 206. Debris screen; 207. Stock solution inlet; 208. Separation cylinder limit rotating groove; 209. Crystal isolation cover; 210. Separation cylinder bottom plate; 211. Crystal pushing plate; 212. Liquid discharging funnel; 213. Crystal discharging port; 214. Crystal isolation ring seat; 215. Crystal blocking ring; 216. Rubber sealing ring; 217. Crystal sliding blocking ring; 218. Liquid return groove; 219. Liquid discharging port; 3. Liquid discharging tank; 4. Liquid separation tank; 5. Liquid separation tank discharging pipe; 6. Liquid extraction and separation tank; 7. Liquid stratification discharging pipe; 8. Crystallization mixed liquid feeding pipe; 9. Crystallizer; 10. Crystallizer support; 11. Crystallizer feeding pipe; 12. Crystallization feeding pipe; 13. First gas-phase collection tank; 14. Cooling cover; 15. Collection tank connecting pipe; 16. Second gas-phase collection tank; 17. Liquid separation tank support; 18. Second gas-phase collection tank support; 19. First gas-phase collection tank support; 20. Phase change coolant inlet pipe; 21. Phase change coolant outlet pipe. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] As Figures 1 to 2As shown in the figure, an embodiment of the present invention provides a three-phase separation device based on low-temperature crystallization, which includes a device bottom plate 1 and a crystal solid-liquid separation component 2. The upper surface of the device bottom plate 1 is fixedly installed with a crystallizer 9. The lower end of the crystallizer 9 is connected to a crystallization mixed liquid feed pipe 8. The lower end of the crystallization mixed liquid feed pipe 8 is connected to the crystal solid-liquid separation component 2. The crystal solid-liquid separation component 2 is fixedly installed on the upper surface of the device bottom plate 1. The lower end of the crystal solid-liquid separation component 2 is connected to a liquid discharge tank 3. One end of the liquid discharge tank 3 is connected to a liquid separation tank 4. One end of the liquid separation tank 4 is connected to a liquid separation tank discharge pipe 5. The upper end of the liquid separation tank discharge pipe 5 is connected to a liquid extraction separation tank 6. The lower end of the liquid extraction separation tank 6 is provided with a liquid separation tank support 17. Two liquid stratification discharge pipes 7 are arranged on the side of the liquid extraction separation tank 6. The lower end of the crystallizer 9 is fixedly installed with a crystallizer support 10. The upper end of the crystallizer 9 is provided with a crystallizer feed pipe 11 and a crystallization feed pipe 12. One end of the crystallization feed pipe 12 is connected to a first gas-phase collection tank 13. One end of the first gas-phase collection tank 13 is connected to a collection tank connection pipe 15. One end of the collection tank connection pipe 15 is connected to a second gas-phase collection tank 16. A cooling cover 14 is arranged outside the first gas-phase collection tank 13. One side of the cooling cover 14 is respectively connected to a phase-change carrier refrigerant inlet pipe 20 and a phase-change carrier refrigerant outlet pipe 21. The lower end of the first gas-phase collection tank 13 is provided with a first gas-phase collection tank support 19. The lower end of the second gas-phase collection tank 16 is provided with a second gas-phase collection tank support 18.

[0019] In the above technical solution, the gas in the second gas-phase collection tank 16 is first passed into the first gas-phase collection tank 13. The phase-change carrier refrigerant is connected through the phase-change carrier refrigerant inlet pipe 20 and the phase-change carrier refrigerant outlet pipe 21 connected to the side of the cooling cover 14 to cool the gas therein. Subsequently, the low-temperature gas is passed into the crystallizer 9 through the crystallization feed pipe 12, and materials are added through the crystallizer feed pipe 11, so that the gas crystallizes inside and the remaining condenses into a liquid. Then, the liquid is pumped into the crystal solid-liquid separation component 2 through the crystallization mixed liquid feed pipe 8. After the crystals are separated, the remaining liquid is connected through the liquid discharge tank 3, and after passing through the liquid separation tank 4, the liquid substances have different densities in the liquid extraction separation tank 6. After stratification, they are respectively taken out through the two liquid stratification discharge pipes 7. The entire separation process is very continuous, greatly improving the processing efficiency. A separation interface adjustment device is added in the liquid extraction separation tank 6 to adjust the material separation rate according to the differences in properties such as viscosity and density. An internal circulating inert gas is added to improve the heat exchange efficiency and prevent the explosion of flammable and explosive materials.

[0020] Such as Figure 1 、 Figures 3 to 8As shown in the figure, the crystal solid-liquid separation component 2 includes: a solid-liquid separation component housing 201, a housing base 202, a centrifugal separation motor 203, a centrifugal separation main shaft 204, a centrifugal separation cylinder group 205, a debris screen 206, a stock solution inlet 207, a separation cylinder limit rotation groove 208, a crystal isolation cover 209, a liquid discharge funnel 212, and a crystal discharge port 213; a housing base 202 is provided at the outer end of the solid-liquid separation component housing 201, a centrifugal separation motor 203 is fixedly installed at the top of the solid-liquid separation component housing 201, a centrifugal separation main shaft 204 is coaxially fixedly connected to the output shaft of the centrifugal separation motor 203, and a centrifugal separation cylinder group 205 is coaxially provided at the lower end of the centrifugal separation main shaft 204; a separation cylinder limit rotation groove 208 is provided on the inner wall of the solid-liquid separation component housing 201, a debris screen 206 is provided at the upper end of the separation cylinder limit rotation groove 208, a crystal isolation cover 209 is further provided on the centrifugal separation main shaft 204, a stock solution inlet 207 is integrally provided on the side surface of the solid-liquid separation component housing 201, a crystal discharge port 213 is further opened on the side surface of the solid-liquid separation component housing 201, a plurality of crystal pushing plates 211 are provided outside the centrifugal separation cylinder group 205, a crystal isolation ring seat 214 is provided at the inner bottom end of the centrifugal separation cylinder group 205, a separation cylinder bottom plate 210 is provided on the inner wall of the solid-liquid separation component housing 201 and below the centrifugal separation cylinder group 205, a crystal blocking ring 215 is fixedly installed at the lower end of the centrifugal separation cylinder group 205, a rubber sealing ring 216 is provided at the outer end of the crystal blocking ring 215, a liquid return groove 218 is opened on the upper surface of the separation cylinder bottom plate 210, and a crystal sliding blocking ring 217 is integrally provided at the lower end of the crystal blocking ring 215 and located in the liquid return groove 218; a liquid discharge port 219 is opened on the upper surface of the separation cylinder bottom plate 210 and between the crystal blocking ring 215 and the crystal isolation ring seat 214.

[0021] In the above technical solution, the stock solution is passed through the stock solution inlet 207 into the solid-liquid separation component housing 201 through the crystallization mixture feed pipe 8. By starting the centrifugal separation motor 203, the centrifugal separation main shaft 204 can be driven to rotate, and the centrifugal separation cylinder group 205 can be driven to rotate. Through the centrifugal force during rotation, the crystallized solids are extracted. When they fall between the centrifugal separation cylinder group 205 and the solid-liquid separation component housing 201, they are pushed out through the crystal discharge port 213 by the crystal pushing plates 211, while the liquid falls into the liquid discharge port 219 through the gap between the crystal isolation cover 209 and the crystal isolation ring seat 214 and is discharged through the liquid discharge funnel 212. Among them, the crystal isolation cover 209 can prevent the crystals falling from above from directly falling into the liquid discharge port 219.

[0022] As Figure 5 、 Figures 9 to 11As shown, the centrifugal separation cylinder group 205 includes: a separation cylinder shell 2051, a separation cylinder drainage ring 2052, a crystal extraction port 2053, a crystal centrifugal lifting pipe 2054, and a liquid level control member 2055; a separation cylinder drainage ring 2052 is integrally provided at the upper end of the separation cylinder shell 2051, a crystal extraction port 2053 is provided on the side of the separation cylinder shell 2051, a crystal centrifugal lifting pipe 2054 is integrally provided on the inner wall of the separation cylinder shell 2051, and a liquid level control member 2055 is fixedly installed below the top end of the crystal centrifugal lifting pipe 2054.

[0023] In the above technical solution, the separation cylinder shell 2051 is driven to rotate by the centrifugal separation main shaft 204. After the crystals are thrown to the edge by centrifugal force, they enter the crystal centrifugal lifting pipe 2054. The crystals continuously move in the crystal centrifugal lifting pipe 2054 by centrifugal force and rotational force. When they move to the crystal extraction port 2053, they fall between the centrifugal separation cylinder group 205 and the outer shell 201 of the solid-liquid separation component.

[0024] As Figure 5 , Figures 12 to 15 shown, the liquid level control member 2055 includes: a control member housing 2056, a sealing plate lifting groove 2057, a control sealing plate 2058, a liquid level lifting rod 2059, a mis-touch limiting chute 20510, a synchronous lifting rod 20511, and a liquid level buoyancy ball 20513; a sealing plate lifting groove 2057 is provided at the upper end of the control member housing 2056, a control sealing plate 2058 is slidably arranged in the sealing plate lifting groove 2057, a synchronous lifting rod 20511 is fixedly connected to the inner side of the control sealing plate 2058, and a liquid level lifting rod 2059 is slidably inserted through the lower end of the control member housing 2056; a liquid level buoyancy ball 20513 is fixedly installed at the lower end of the liquid level lifting rod 2059, a mis-touch limiting chute 20510 is provided at the upper end of the liquid level lifting rod 2059, the synchronous lifting rod 20511 is arranged in the mis-touch limiting chute 20510, a sealing plate limiting groove 20512 is integrally provided on the inner wall of the control member housing 2056, a limiting spring cylinder 20514 is fixedly connected to the front end of the synchronous lifting rod 20511, a spring bottom plate 20515 is slidably arranged in the limiting spring cylinder 20514, a limiting chuck 20516 is integrally provided at the front end of the spring bottom plate 20515, and a limiting spring 20517 is provided at the rear end of the spring bottom plate 20515.

[0025] In the above technical solution, by separating the height of the liquid level inside the separation cylinder shell 2051, the height of the liquid level buoyancy ball 20513 is controlled. When the liquid level is too high, the buoyancy brought by the liquid pushes the liquid level buoyancy ball 20513 to move upward, and through the liquid level lifting rod 2059, the synchronous lifting rod 20511 is pushed, so as to be able to push the control sealing plate 2058 on one side to slide upward, preventing too much liquid from flowing out of the crystal extraction port 2053 when the liquid level is too high and unable to flow back through the gap between the crystal sliding retaining ring 217 and the liquid return groove 218. When the liquid level reaches a certain height, the synchronous lifting rod 20511 will carry the limit spring cylinder 20514 at one end and the sliding limit clamping head 20516 inside it to be stuck in the sealing plate limit groove 20512, while the mis-touch limit chute 20510 provides a frame amount for the fluctuations brought by the rotation of the liquid. After sealing, the liquid is first discharged through the crystal isolation cover 209 and the crystal isolation ring seat 214. When the liquid level returns, the suspended liquid level buoyancy ball 20513 can pull out the limit clamping head 20516 from the sealing plate limit groove 20512 due to its own weight, enabling it to continue to separate and crystallize.

[0026] Working principle: In the present invention, the gas in the second gas collection tank 16 is first passed to the first gas collection tank 13. The phase change heat transfer fluid is connected through the phase change heat transfer fluid inlet pipe 20 and the phase change heat transfer fluid outlet pipe 21 connected to the side of the cooling cover 14 to cool the gas therein. Subsequently, the low-temperature gas is passed to the crystallizer 9 through the crystallization feed pipe 12, and materials are added through the crystallizer feeding pipe 11, so that the gas crystallizes inside and the remaining condenses into a liquid. Then, the liquid is pumped into the crystal solid-liquid separation assembly 2 through the crystallization mixed liquid feed pipe 8. After the crystals are separated, the remaining liquid is connected through the liquid discharge tank 3 and is transferred in the liquid separation tank 4. In the liquid extraction and separation tank 6, due to the different densities of the liquid substances, after stratification, they are respectively taken out through the two liquid stratification discharge pipes 7. The whole separation process is very continuous, greatly improving the processing efficiency; Among them, the original liquid is passed through the original liquid inlet 207 to the inside of the solid-liquid separation assembly housing 201 through the crystallization mixed liquid feed pipe 8. By starting the centrifugal separation motor 203, the centrifugal separation main shaft 204 can be driven to rotate, and the centrifugal separation cylinder group 205 is driven to rotate. Through the centrifugal force during rotation, the crystallized solids are extracted. When they fall between the centrifugal separation cylinder group 205 and the solid-liquid separation assembly housing 201, they are pushed out through the crystal discharge port 213 by the crystal pushing plate 211, while the liquid falls to the liquid discharge port 219 through the gap between the crystal isolation cover 209 and the crystal isolation ring seat 214 and is discharged through the liquid discharge funnel 212. Among them, the crystal isolation cover 209 can prevent the crystals falling from above from directly falling into the liquid discharge port 219; Among them, the main shaft 204 of the centrifugal separation drives the separation cylinder shell 2051 to rotate. After the crystals are thrown to the edge by centrifugal force, they enter the crystal centrifugal lifting pipeline 2054, and the centrifugal force and rotational force make the crystals continuously move in the crystal centrifugal lifting pipeline 2054. When moving to the crystal extraction port 2053, they fall between the centrifugal separation cylinder group 205 and the housing 201 of the solid-liquid separation component. Among them, the height of the liquid level buoyancy ball 20513 is controlled by the height of the liquid level inside the separation cylinder shell 2051. When the liquid level is too high, the buoyancy brought by the liquid pushes the liquid level buoyancy ball 20513 to move upward, and through the liquid level lifting rod 2059, it pushes the synchronous lifting rod 20511, so as to be able to push the control sealing plate 2058 on one side to slide upward, preventing too much liquid from flowing out of the crystal extraction port 2053 and being unable to flow back through the gap between the crystal sliding retaining ring 217 and the liquid return groove 218. When the liquid level reaches a certain height, the synchronous lifting rod 20511 will bring the limit spring cylinder 20514 at one end and the sliding limit chuck 20516 inside it to be stuck in the sealing plate limit groove 20512. The misaligned limit chute 20510 provides a margin for the fluctuations brought by the rotation of the liquid. After sealing, the liquid is discharged first through between the crystal isolation cover 209 and the crystal isolation ring seat 214. When the liquid level returns, the suspended liquid level buoyancy ball 20513 can pull the limit chuck 20516 out of the sealing plate limit groove 20512 due to its own weight, enabling it to continue separating the crystals.

[0027] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is impossible to list all the implementation manners here. All obvious changes or variations derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. A three-phase separation device based on low temperature crystallization, comprising a device bottom plate (1) and a crystal solid-liquid separation component (2), characterized in that: A crystallizer (9) is fixedly mounted on the upper surface of the bottom plate (1) of the device, a crystallizer (9) is connected to a crystallization mixed liquid feed pipe (8) at the lower end, a lower end of the crystallization mixed liquid feed pipe (8) is connected to a crystal solid-liquid separation component (2), and the crystal solid-liquid separation component (2) is fixedly mounted on the upper surface of the bottom plate (1) of the device; The lower end of the crystal solid-liquid separation component (2) is connected to a liquid discharge tank (3), one end of the liquid discharge tank (3) is connected to a liquid separation tank (4), one end of the liquid separation tank (4) is connected to a liquid separation tank discharge pipe (5), the upper end of the liquid separation tank discharge pipe (5) is connected to a liquid extraction separation tank (6), the lower end of the liquid extraction separation tank (6) is provided with a liquid separation tank bracket (17), and two liquid layering discharge pipes (7) are provided on the side of the liquid extraction separation tank (6).

2. A three-phase separation device based on low temperature crystallization according to claim 1, characterized in that: A crystallizer support (10) is fixedly mounted at the lower end of the crystallizer (9), and a crystallizer feeding pipe (11) and a crystallizer feeding pipe (12) are arranged at the upper end of the crystallizer (9); one end of the crystallizer feeding pipe (12) is connected to a first gas phase collecting tank (13); one end of the first gas phase collecting tank (13) is connected to a collecting tank connecting pipe (15); and one end of the collecting tank connecting pipe (15) is connected to a second gas phase collecting tank (16).

3. A three-phase separation device based on low temperature crystallization according to claim 2, characterized in that: A cooling cover (14) is arranged outside the first gas phase collecting tank (13), and one side of the cooling cover (14) is respectively connected to a phase-change coolant inlet pipe (20) and a phase-change coolant outlet pipe (21); A first gas phase collection tank support (19) is provided at the lower end of the first gas phase collection tank (13), and a second gas phase collection tank support (18) is provided at the lower end of the second gas phase collection tank (16).

4. A three-phase separation device based on low temperature crystallization according to claim 3, characterized in that: The crystal solid-liquid separation component (2) comprises: a solid-liquid separation component housing (201), a component housing base (202), a centrifugal separation motor (203), a centrifugal separation main shaft (204), a centrifugal separation cylinder group (205), a debris screen (206), a raw liquid feed port (207), a separation cylinder limit rotation groove (208), a crystal isolation cover (209), a liquid discharge funnel (212), and a crystal discharge port (213); The outer end of the solid-liquid separation component housing (201) is provided with a component housing base (202); a centrifugal separation motor (203) is fixedly mounted on the top of the solid-liquid separation component housing (201); a centrifugal separation main shaft (204) is coaxially fixedly connected to the output shaft of the centrifugal separation motor (203); and a centrifugal separation cylinder group (205) is coaxially arranged at the lower end of the centrifugal separation main shaft (204); A separation barrel limiting groove (208) is provided on the inner wall of the solid-liquid separation component housing (201), a debris screen (206) is provided at the upper end of the separation barrel limiting groove (208), a crystal isolation cover (209) is also provided on the centrifugal separation main shaft (204), a raw liquid feed port (207) is integrally provided on the side of the solid-liquid separation component housing (201), and a crystal discharge port (213) is also provided on the side of the solid-liquid separation component housing (201).

5. A three-phase separation device based on low temperature crystallization according to claim 4, characterized in that: A plurality of crystal pushing plates (211) are arranged outside the centrifugal separation barrel group (205), and a crystal isolation ring seat (214) is arranged at the bottom end inside the centrifugal separation barrel group (205).

6. A three-phase separation device based on low temperature crystallization according to claim 5, characterized in that: A separation barrel bottom plate (210) is provided on the inner wall of the solid-liquid separation component housing (201) and below the centrifugal separation barrel group (205); a crystal blocking ring (215) is fixedly mounted at the lower end of the centrifugal separation barrel group (205); a rubber sealing ring (216) is provided at the outer end of the crystal blocking ring (215); a liquid reflux groove (218) is provided on the upper end surface of the separation barrel bottom plate (210); and a crystal sliding blocking ring (217) is integrally provided at the lower end of the crystal blocking ring (215) and located in the liquid reflux groove (218); A liquid discharge port (219) is provided on the upper end surface of the separation cylinder bottom plate (210) and is located between the crystal blocking ring (215) and the crystal isolation ring seat (214).

7. A three-phase separation device based on low temperature crystallization according to claim 6, characterized in that: The centrifugal separation cylinder assembly (205) comprises: a separation cylinder shell (2051), a separation cylinder drainage ring (2052), a crystal extraction port (2053), a crystal centrifugal lifting pipeline (2054), and a liquid level control component (2055); A separation tube drainage ring (2052) is integrally provided at the upper end of the separation tube shell (2051), a crystal extraction port (2053) is provided on the side of the separation tube shell (2051), a crystal centrifugal lifting pipe (2054) is integrally provided on the inner wall of the separation tube shell (2051), and a liquid level control component (2055) is fixedly installed below the top end of the crystal centrifugal lifting pipe (2054).

8. A three-phase separation device based on low temperature crystallization according to claim 7, characterized in that: The liquid level control component (2055) comprises: a control component housing (2056), a sealing plate lifting groove (2057), a control sealing plate (2058), a liquid level lifting rod (2059), an error-touch limit sliding groove (20510), a synchronous lifting rod (20511), and a liquid level buoyancy ball (20513); A sealing plate lifting groove (2057) is provided at the upper end of the control element housing (2056), a control sealing plate (2058) is slidably arranged in the sealing plate lifting groove (2057), a synchronous lifting rod (20511) is fixedly connected to the inner side of the control sealing plate (2058), and a liquid level lifting rod (2059) is slidably inserted into the lower end of the control element housing (2056); A liquid level buoyancy ball (20513) is fixedly mounted on the lower end of the liquid level lifting rod (2059), and an error-touch limit sliding groove (20510) is provided on the upper end of the liquid level lifting rod (2059).

9. A three-phase separation device based on low temperature crystallization according to claim 8, characterized in that: The synchronous lifting rod (20511) is arranged in the false contact limiting sliding groove (20510).

10. A three-phase separation device based on low temperature crystallization according to claim 9, characterized in that: A sealing plate limiting groove (20512) is integrally provided on the inner wall of the control component housing (2056); the front end of the synchronous lifting rod (20511) is fixedly connected to a limiting spring cylinder (20514); a spring bottom plate (20515) is slidably provided in the limiting spring cylinder (20514); a limiting clamp (20516) is integrally provided at the front end of the spring bottom plate (20515); and a limiting spring (20517) is provided at the rear end of the spring bottom plate (20515).

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