Evaporation and crystallization integrated equipment

Abstract

The invention discloses evaporation and crystallization integrated equipment, and belongs to the technical field of evaporation and crystallization equipment, the evaporation and crystallization integrated equipment comprises a crystallizer, a gas-liquid separator, a circulating pipe, a surrounding plate, a sealing baffle plate, a scraping plate and a rotating roller, the rotating roller is driven by a rotating unit installed on the gas-liquid separator to rotate, and the circulating pipe is connected with the circulating pipe. And the scraping plate is connected with the roller surface of the rotating roller in an abutting manner. According to the invention, after a concentrated material enters the gas-liquid separator from the concentrated material inlet, part of the concentrated material rotates along with the rotating roller along with the rotation of the rotating roller, so that the flash evaporation efficiency of the concentrated material is improved, the evaporation capacity of a liquid solvent in the concentrated material is further improved, and the precipitation amount of crystals is improved; compared with the prior art, the device has the advantages that the evaporation capacity of the liquid solvent is improved, the flash evaporation efficiency is improved, and the crystal separation efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of evaporation and crystallization equipment, and in particular relates to an integrated evaporation and crystallization equipment. Background Art

[0002] Evaporative crystallization is a method for separating and purifying solid substances, which is widely used in the chemical, pharmaceutical and food industries. Its basic principle is to gradually increase the solute concentration in the solution by evaporating part of the solvent. When the solute concentration reaches saturation, the solute will precipitate in the form of crystals.

[0003] A utility model patent with Chinese patent publication number CN203425537U is searched and disclosed, which is an integrated evaporation and crystallization equipment, including a vapor-liquid separator and a crystallizer, wherein the vapor-liquid separator has a top exhaust port and a middle feed port, and the crystallizer has a middle liquid outlet and a bottom outlet, and is characterized in that: the vapor-liquid separator is connected to the top of the crystallizer, the bottom of the vapor-liquid separator has a central circulation pipe extending into the crystallizer, and a vapor phase pipe is connected between the crystallizer and the vapor-liquid separator.

[0004] In the above-mentioned prior art, the concentrated material enters the gas-liquid separator from the feed port of the gas-liquid separator (referred to as the concentrated material inlet in this application), and then the concentrated material falls into the crystallizer after flash evaporation. Since the concentrated material falls into the circulation pipe directly by gravity from the feed port, the concentrated material stays in the gas-liquid separator for a long time, resulting in a relatively short flash evaporation process. In addition, a large amount of material enters the gas-liquid separator from the feed port, and most of the material in the concentrated material is wrapped by the solvent and cannot effectively contact the secondary steam, resulting in most of the concentrated material falling into the crystallizer before flash evaporation. In this way, the amount of liquid solvent in the concentrated material is still large, and most of the concentrated material does not produce effective flash evaporation, resulting in low crystal growth efficiency. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide an integrated evaporation and crystallization device.

[0006] The technical solution adopted to solve the above technical problems is: An integrated evaporation and crystallization device, comprising: A crystallizer with a material circulation outlet on the outer wall and a discharge port at the bottom of the crystallizer; A gas-liquid separator fixedly connected to the upper end of the crystallizer, wherein the outer wall of the gas-liquid separator is provided with a concentrated material inlet, and the lower end of the gas-liquid separator is fixedly connected to a circulation pipe extending vertically toward the inside of the crystallizer; The enclosures are fixedly connected to the inner walls on both sides of the inner cavity of the gas-liquid separator, a sealing baffle is fixedly connected to the inner cavity wall on one side of the gas-liquid separator adjacent to the concentrated material inlet, and a scraper plate bent upward is provided at one end of the sealing baffle away from the concentrated material inlet, and the outer walls on both sides of the sealing baffle are respectively fixedly connected to the surfaces of the two enclosures, so that the sealing baffle, the scraper plate and the two enclosures form a material storage cavity, and the scraper plate and the inner cavity wall on the side of the gas-liquid separator away from the concentrated material inlet form a material drop channel; A rotating roller is rotatably connected to the material storage chamber, the rotating roller is driven to rotate by a rotating unit installed on the gas-liquid separator, and the scraper plate is in contact with the roller surface of the rotating roller.

[0007] Through the above technical scheme, the concentrated material is transported from the concentrated material inlet to the gas-liquid separator, and then the concentrated material will enter the material storage chamber surrounded by the enclosure, the sealing baffle and the scraper plate for storage. The rotating roller is driven by the rotating unit to rotate. During the rotation, the roller surface of the rotating roller contacts the concentrated material, so that the concentrated material sticks to the roller surface of the rotating roller and is taken away to the material storage chamber as the roller surface of the rotating roller rotates. In this way, the concentrated material can be heated in small amounts by the secondary steam in the gas-liquid separator. At the same time, the concentrated material can be effectively flash evaporated, so that the solvent in the concentrated material is evaporated, and the solute is precipitated to form crystals. The crystals fall into the circulation pipe from the material dropping channel, and then enter the crystallizer for crystallization. The supernatant in the crystallizer is heated and concentrated again by the material circulation outlet and transported to the concentrated material inlet, thereby realizing the cyclic evaporation and crystallization of the concentrated material.

[0008] Furthermore, an end cover is provided on the top of the gas-liquid separator, and a gas phase outlet is provided on the end cover.

[0009] Through the above technical solution, after the concentrated material on the roller surface of the rotating roller is heated by the secondary steam, the formed steam will enter the next effect body from the gas phase outlet, and the steam can be recycled.

[0010] Furthermore, one end of the sealing baffle extends to the inner edge of the concentrated material inlet.

[0011] Through the above technical solution, the sealing baffle extends to the inner edge of the concentrated material inlet, which will allow the concentrated material to quickly disperse after entering the gas-liquid separator from the concentrated material inlet. This is beneficial to the flash evaporation of the concentrated material and reduces the low flash evaporation efficiency caused by the accumulation of concentrated materials.

[0012] Furthermore, the upper side of the scraper plate facing away from the rotating roller is sloped.

[0013] Through the above technical solution, the upper edge of the scraper plate is made sharper, so that when the rotating roller rotates, the edge of the scraper plate can smoothly scrape off the crystals adhered to the roller surface of the rotating roller.

[0014] Furthermore, the rotating unit includes a rotating shaft horizontally penetrated through the two enclosures, the rotating shaft is rotatably connected to the enclosure and the gas-liquid separator, and one end of the rotating shaft passes through the gas-liquid separator, a reduction motor is installed on the outer wall of the gas-liquid separator, the reduction motor is drivingly connected to the rotating shaft, a rotating disk is embedded in the end surface of one side of the rotating roller, the rotating disk and the rotating roller are detachably connected, the rotating disk is fixedly sleeved on the periphery of the rotating shaft, a fixed sleeve is rotatably penetrated through the end surface of the other side of the rotating roller, the rotating roller is coaxially provided with a sleeve hole for the fixed sleeve to pass freely, the rotating shaft is coaxially penetrated in the fixed sleeve and rotates freely, the fixed sleeve is coaxially fixed with a connecting disk at one end away from the rotating disk, and the connecting disk is embedded in one of the enclosures.

[0015] Through the above technical solution, when the rotating shaft rotates, it will drive the rotating disk to rotate. Since the end faces of the rotating disk and the rotating roller are connected, the rotating disk will drive the rotating roller to rotate. Since the fixed sleeve is installed in the sleeve hole and the connecting disk is fixed on one of the enclosures, the fixed sleeve is also rotatably connected to the rotating roller, so that the fixed sleeve can play a radial supporting role on the rotating roller. Therefore, when the rotating disk drives the rotating roller to rotate, it can drive the rotating roller to rotate. When the rotating roller rotates, due to the support of the fixed sleeve and the rotating disk, the rotating roller will not shake or generate stress concentration at the connection position with the rotating disk.

[0016] Furthermore, the periphery of the rotating roller is provided with a plurality of recessed material grooves in an array along its axial direction, an arc-shaped plate is engaged with the inner cavity of the material groove, and the arc-shaped plate slides freely in the radial direction of the rotating roller in the material groove, and a plurality of liquid pushing mechanisms are provided in the rotating roller, and the liquid pushing mechanisms are used to drive one of the arc-shaped plates adjacent to the scraper plate to move toward the outer side of the mouth of the material groove when the rotating roller rotates, until the outer arc surface of the arc-shaped plate and the roller surface of the rotating roller are located on the same circumferential surface.

[0017] Through the above technical scheme, when the rotating roller rotates, the material slots in the material storage chamber are all in an open state, that is, the arc-shaped plate in the material slot is in a state of being retracted into the material slot, so that the mouth of the material slot is in an open state, so that when the rotating roller rotates, the concentrated material in the material storage chamber will enter the material slot, and as the rotating roller rotates, the concentrated material is taken away from the material slot to the material storage chamber, that is, the concentrated material in the material slot moves upward, so that the concentrated material in the material storage chamber can be quickly taken away by the rotating roller to the material drop channel, thereby preventing the concentrated material from being continuously input from the concentrated material inlet, and the roller surface of the rotating roller cannot take away more concentrated material, thereby causing The concentrated material accumulates in the material storage chamber, which reduces the flash evaporation efficiency of the concentrated material in the material storage chamber. In addition, by setting up a liquid pushing mechanism, when the material trough rotates toward the scraper plate, the concentrated material in the material trough will precipitate crystals. At this time, the volume of the crystals is smaller, which makes it easy for these smaller crystals to adhere to the surface of the arc plate or the surface of the rotating roller and cannot fall into the crystallizer for growth. Therefore, when the material trough rotates to the scraper plate, the liquid pushing mechanism drives the arc plate to move radially outward of the rotating roller, so that the arc plate can push the crystals and concentrated materials in the material trough to the outside of the material trough, so that the scraper plate can fully scrape off the crystals and concentrated materials.

[0018] Furthermore, the liquid pushing mechanism includes a push rod vertically fixed on a surface of the arc plate facing the radial inner side of the rotating roller, a mounting hole for the push rod to be slidably inserted is opened in the rotating roller, the mounting hole is connected with the sleeve hole, an annular accommodating cavity is opened on the periphery of the fixed sleeve, a protrusion is fixed on the fixed sleeve, the protrusion is located in the annular accommodating cavity, and the end of the push rod away from the arc plate is correspondingly connected to the surface of the protrusion and the inner wall of the annular accommodating cavity.

[0019] Through the above technical scheme, the end of the push rod corresponding to the arc plate located in the material storage chamber contacts the inner ring wall of the annular accommodating chamber. When the rotating roller rotates, the arc plate will approach the scraper plate, so that the end of the push rod will change from contacting the inner ring wall of the annular accommodating chamber to contacting the surface of the protrusion. The protrusion will generate an extrusion force toward the radial outside of the rotating roller on the push rod, and then the push rod drives the arc plate to move toward the radial outside of the rotating roller, so that the arc plate can discharge the concentrated material and crystals in the material trough.

[0020] Furthermore, a ball is rotatably embedded in the end of the push rod, and when the rotating roller rotates, the ball rolls and contacts with the surface of the convex block and the inner wall of the annular accommodating cavity alternately.

[0021] Through the above technical solution, the balls alternately roll with the bump surface and the inner wall of the annular accommodating cavity, replacing the sliding contact between the push rod end and the bump surface and the inner wall of the annular accommodating cavity, thereby reducing the wear on the push rod end.

[0022] Furthermore, a mounting cavity is provided in the rotating roller and is connected to the mounting hole and the material trough. A stop block is fixedly connected to a side opening of the mounting cavity facing the roller surface of the rotating roller. A through hole is provided on the end face of the stop block for the push rod to pass freely. A limiting ring is fixedly mounted on the portion of the push rod that penetrates into the mounting cavity. An elastic member is provided between the limiting ring and the stop block.

[0023] Through the above technical scheme, when the ball contacts the surface of the protrusion, the ball will be subjected to the squeezing force of the protrusion, so that the ball drives the push rod to move toward the radial outer side of the rotating roller, and causes the limiting ring to squeeze the elastic part, and the elastic part begins to accumulate elastic potential energy. When the ball breaks away from the contact with the surface of the protrusion and turns to contact the inner ring wall of the annular accommodating cavity, the elastic potential energy of the elastic part is released and drives the limiting ring to move in the opposite direction, so that the push rod moves toward the radial inner side of the rotating roller, thereby retracting the arc plate into the material groove and opening the mouth of the material groove.

[0024] Furthermore, the elastic member is a spring wrapped around the periphery of the push rod, and the two ends of the spring in the direction of elastic force elastically press against the limiting ring and the stop block respectively.

[0025] Through the above technical solution, the spring has a simple structure and good elastic deformation ability, so that after the ball is out of contact with the protrusion, the push rod can be quickly driven to move in the opposite direction to retract the arc plate into the material trough.

[0026] The beneficial effects of the present invention are as follows: In the present invention, after the concentrated material enters the gas-liquid separator from the concentrated material inlet, as the rotating roller rotates, part of the concentrated material will rotate with the rotating roller, so that the flash evaporation efficiency of the concentrated material is improved, and then the evaporation amount of the liquid solvent in the concentrated material is increased, so that the precipitation amount of the crystal is increased, and the precipitated crystals are scraped into the falling channel by the scraper plate and fall into the crystallizer through the circulation pipe to grow. Compared with the prior art, the evaporation amount of the liquid solvent is increased, the flash evaporation efficiency is improved, and the efficiency of crystal precipitation is improved; In the present invention, by providing a material trough and an arc-shaped plate, when the rotating roller rotates, the concentrated material in the material storage chamber can enter the material trough, and move upward with the rotation of the rotating roller, so that the amount of secondary steam contacted by the concentrated material in the material trough increases, thereby improving the flash evaporation efficiency of the concentrated material. In addition, when the rotating roller continues to rotate, the concentrated material in the material storage chamber can be continuously brought into the circulation pipe through the material trough after flash evaporation, thereby reducing the phenomenon that some concentrated materials are not flashed in time due to the accumulation of concentrated materials. In the present invention, when the rotating roller rotates, an arc-shaped plate that rotates and approaches the scraper plate will be driven by the liquid pushing mechanism to move toward the outer side of the roller surface of the rotating roller, so that the arc-shaped plate can push the concentrated material and the precipitated crystals in the material tank out of the material tank together, and through the scraping of the scraper plate, the concentrated material and the precipitated crystals can fall into the circulation pipe from the falling channel until they fall into the crystallizer, so that the crystals and the concentrated material entering from the concentrated material inlet can be separated. In addition, after the arc-shaped plate moves toward the outer side of the material slot mouth, the outer arc surface of the arc-shaped plate and the roller surface of the rotating roller will be on the same circumferential surface, so that the scraper plate can completely scrape off the concentrated material and the precipitated crystals in the material tank, thereby improving the crystal preparation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an integrated evaporation and crystallization device in the present invention; Figure 2 yes Figure 1 Schematic diagram of the positional relationship of some structures after being cut open from another perspective; Figure 3 It is a schematic diagram of the positional relationship of the rotating roller, the rotating disk, the connecting disk and the arc plate after being assembled in the present invention; Figure 4 yes Figure 3 Schematic diagram of the explosion decomposition of the structure in the middle; Figure 5 yes Figure 3 Schematic diagram of the positional relationship of some structures after being cut open from another perspective; Figure 6 It is a schematic diagram of the positional relationship of the arc plate, the push rod and the fixed sleeve after assembly in the present invention; Figure 7 yes Figure 6 A magnified schematic diagram of the local structure at point A; Figure 8 It is a schematic diagram of the positional relationship of the gas-liquid separator, the crystallizer and the sealing baffle after assembly in the present invention; Fig. 9 It is a schematic structural diagram of the rotating roller in the present invention; Fig.10 yes Fig. 9 Schematic cross-sectional view of the structure.

[0028] Reference numerals: 1. Discharge port; 2. Crystallizer; 3. Material circulation outlet; 4. Concentrated material inlet; 5. Speed ​​reducer; 6. Gas-liquid separator; 7. End cover; 8. Sealing baffle; 9. Material storage chamber; 10. Rotating roller; 11. Enclosure; 12. Scraper plate; 13. Circulation pipe; 14. Rotating shaft; 15. Arc plate; 16. Material trough; 17. Connecting plate; 18. Sleeve hole; 19. Installation chamber; 20. Fixed sleeve; 21. Annular accommodating chamber; 22. Bump; 23. Push rod; 24. Spring; 25. Limiting ring; 26. Stop block; 27. Ball; 28. Installation hole; 29. ​​Rotating plate. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figure 1-Figure 10 As shown; The present embodiment provides an integrated evaporation and crystallization device, comprising a crystallizer 2 with a discharge port 1 at the bottom, a control valve (not shown in the figure) installed at the discharge port 1, a material circulation outlet 3 is provided on the outer wall at the middle position of the crystallizer 2, and the material circulation outlet 3 is connected to an external delivery pump through a pipeline, a gas-liquid separator 6 is welded to the upper end of the crystallizer 2, the top of the gas-liquid separator 6 is open and an end cover 7 is installed, and a gas phase outlet is provided on the end cover 7, a concentrated material inlet 4 is provided on the outer wall of one side of the gas-liquid separator 6, and the concentrated material inlet 4 is connected to an external evaporator and a material pump, the material pump transports the material to the evaporator, the evaporator heats and concentrates the material, and the heated and concentrated material is then transported to the concentrated material inlet 4, the lower end of the gas-liquid separator 6 is in a bundle shape from top to bottom, and a circulation pipe 13 is welded to the lower port of the gas-liquid separator 6, and the lower end of the circulation pipe 13 extends vertically to the inside of the crystallizer 2; A sealing baffle 8 is welded on the inner wall of the gas-liquid separator 6 adjacent to the concentrated material inlet 4, and the end of the sealing baffle 8 is fixedly connected to the inner edge of the concentrated material inlet 4. In addition, enclosures 11 are welded on the inner walls of the opposite sides of the inner cavity of the gas-liquid separator 6. The two enclosures 11 are respectively welded to the two side surfaces of the sealing baffle 8 in the width direction, and the welding joints are sealed. The end of the sealing baffle 8 away from the concentrated material inlet 4 is provided with a scraper plate 12 bent upward. The sealing baffle 8, the scraper plate 12 and the two enclosures 11 form a material storage chamber 9. The concentrated material entering the gas-liquid separator 6 from the concentrated material inlet 4 will enter the material storage chamber 9 for storage. A material drop channel is formed between the scraper plate 12 and the inner cavity wall of the gas-liquid separator 6 away from the concentrated material inlet 4, and the material drop channel is connected to the circulation pipe 13. A rotating shaft 14 is horizontally penetrated on the two enclosures 11, and the rotating shaft 14 is rotatably connected to the enclosure 11 through a bearing, and the rotating shaft 14 is also rotatably connected to the outer wall of the gas-liquid separator 6, and one end of the rotating shaft 14 passes through the outer wall of the gas-liquid separator 6, and a reduction motor 5 is installed on the outer wall of the gas-liquid separator 6, and the reduction motor 5 is drivingly connected to the rotating shaft 14, so that the reduction motor 5 can drive the rotating shaft 14 to rotate, and a rotating roller 10 is arranged between the two enclosures 11 or in the material storage chamber 9, and a rotating disk 29 is embedded on one end surface of the rotating roller 10, and the rotating disk 29 is connected to the rotating roller 10 by screws, and the rotating disk 29 is fixedly sleeved on the periphery of the rotating shaft 14; A fixed sleeve 20 is rotatably penetrated through the end surface of the other side of the rotating roller 10, and a bearing is fixedly mounted on the fixed sleeve 20. The rotating roller 10 is rotatably connected to the fixed sleeve 20 through the bearing, and the fixed sleeve 20 has a radial support effect on the rotating roller 10. The rotating roller 10 is coaxially provided with a sleeve hole 18 for the fixed sleeve 20 to pass freely. The rotating shaft 14 is coaxially penetrated in the fixed sleeve 20 and rotates freely. The end of the fixed sleeve 20 away from the rotating disk 29 is coaxially fixedly connected with a connecting disk 17, and the connecting disk 17 is embedded in one of the enclosures 11. In this way, when the rotating shaft 14 rotates, the rotating disk 29 is driven to rotate, and the rotating disk 29 will synchronously drive the rotating roller 10 to rotate. Since the fixed sleeve 20 is fixedly connected to the enclosure 11, the fixed sleeve 20 will not rotate, and the rotating disk 29 will rotate synchronously. The rotating roller 10 is rotatably connected to the fixed sleeve 20 through the bearing, so that when the rotating roller 10 rotates, it will not be interfered by the fixed sleeve 20, so that when the reduction motor 5 drives the rotating shaft 14 to rotate, it can synchronously drive the rotating roller 10 to rotate, and because of the support of the fixed sleeve 20 and the rotating disk 29, the rotating roller 10 will not shake during rotation or produce stress concentration at the connection position with the rotating disk 29. In addition, the scraper plate 12 is connected to the roller surface of the rotating roller 10 in abutment, and the upper side of the scraper plate 12 facing away from the rotating roller 10 is sloped, so that the upper side of the scraper plate 12 is sharper, so that when the rotating roller 10 rotates, the edge of the scraper plate 12 can smoothly scrape off the crystals adhering to the roller surface of the rotating roller 10; During the process, after the concentrated material enters the gas-liquid separator 6 from the concentrated material inlet 4, as the rotating roller 10 rotates, part of the concentrated material will rotate with the rotating roller 10, so that the flash evaporation efficiency of the concentrated material is improved, and then the evaporation amount of the liquid solvent in the concentrated material is increased, and the precipitation amount of the crystal is increased. The precipitated crystals are scraped into the falling channel by the scraper plate 12 and fall into the crystallizer through the circulation pipe to grow. Compared with the existing technology, the evaporation amount of the liquid solvent is increased, the flash evaporation efficiency is improved, which is beneficial to improve the efficiency of crystal precipitation.

[0031] A plurality of recessed material slots 16 are arranged in an array along the axial direction of the rotating roller 10 on the periphery of the rotating roller 10. An arc plate 15 is engaged with the inner cavity of the material slot 16. The arc plate 15 slides freely in the radial direction of the rotating roller 10 in the material slot 16. A push rod 23 is vertically welded on the radial inner side of the arc plate 15 facing the rotating roller 10. A mounting hole 28 for the push rod 23 to be slidably inserted is provided in the rotating roller 10. The mounting hole 28 is connected with the sleeve hole 18. By providing the material slots 16 and the arc plate 15, when the rotating roller 10 rotates, the concentrated material in the material storage chamber can enter the material slot 16 and move upward with the rotation of the rotating roller 10, so that the amount of secondary steam contacted by the concentrated material in the material slot 16 is increased, thereby improving the flash evaporation efficiency of the concentrated material. In addition, when the rotating roller 10 continues to rotate, the concentrated material in the material storage chamber can be continuously brought into the circulation pipe 13 through the material slot 16 after flash evaporation, thereby reducing the phenomenon that some concentrated materials are not flashed in time due to the accumulation of concentrated materials. An annular accommodating cavity 21 is provided at the periphery of the fixed sleeve 20, a protrusion 22 is fixedly connected to the fixed sleeve 20, the protrusion 22 is located in the annular accommodating cavity 21, and a ball 27 is rotatably embedded at one end of the push rod 23 away from the arc plate 15. When the rotating roller 10 rotates, the ball 27 alternately rolls with the surface of the protrusion 22 and the inner wall of the annular accommodating cavity 21; further, the side of the protrusion 22 facing the radial outer side of the fixed sleeve 20 can be set to a plane, so that when the ball 27 rolls on the side (i.e., the plane) of the protrusion 22 facing the radial outer side of the fixed sleeve 20, the outer arc of the arc plate 15 can be rotated. The surface is on the same circumference as the roller surface of the rotating roller 10 and remains there for a certain period of time until the scraper plate 12 breaks away from the contact with the arc plate 15. A mounting cavity 19 that is connected to the mounting hole 28 and the material trough 16 is opened in the rotating roller 10. A stop block 26 is fixedly connected to the side opening of the mounting cavity 19 facing the roller surface of the rotating roller 10. A through hole is opened on the end surface of the stop block 26 for the push rod 23 to pass freely. The portion where the push rod 23 penetrates into the mounting cavity 19 is fixedly sleeved with a limit ring 25. A spring 24 is sleeved around the periphery of the push rod 23. The two ends of the spring 24 in the elastic force direction elastically resist the limit ring 25 and the stop block 26 respectively.

[0032] The working principle of this embodiment is as follows: The material pump conveys the material to the evaporator, and the evaporator heats and concentrates the material. The heated and concentrated material is then conveyed to the concentrated material inlet 4, and then the concentrated material enters the material storage chamber 9. The reduction motor 5 starts and drives the rotating shaft 14 to rotate. When the rotating shaft 14 rotates, it drives the rotating disk 29 to rotate, and the rotating disk 29 will synchronously drive the rotating roller 10 to rotate. Since the fixed sleeve 20 is fixedly connected to the enclosure 11, the fixed sleeve 20 will not rotate, and the rotating roller 10 is rotatably connected to the fixed sleeve 20 through a bearing, so that when the rotating roller 10 rotates, it will not be interfered by the fixed sleeve 20, so that the reduction motor 5 starts and drives the rotating shaft 14 to rotate. When the rotating shaft 14 rotates, it drives the rotating disk 29 to rotate, and the rotating disk 29 will synchronously drive the rotating roller 10 to rotate. When the motor 5 drives the rotating shaft 14 to rotate, it can synchronously drive the rotating roller 10 to rotate; when the rotating roller 10 rotates, part of the concentrated material in the material storage chamber 9 will enter the material tank 16. As the rotating roller 10 rotates, the concentrated material in the material tank 16 is taken away from the material storage chamber 9. In this process, since the amount of concentrated material in the material tank 16 is small, the contact time and contact range with the secondary steam in the gas-liquid separator 6 are increased, thereby improving the flash evaporation efficiency. After the liquid solvent in the concentrated material is heated and evaporated by the secondary steam, it is discharged from the gas phase outlet on the end cover 7 and enters the next effect body.

[0033] As the rotating roller 10 rotates (refer to Figure 2 , the rotating roller 10 rotates clockwise), when the material trough 16 rotates to the mouth and starts to face downward, the ball 27 will roll from the inner ring wall of the annular accommodating chamber 21 to the surface of the protrusion 22, so that the protrusion 22 generates a thrust toward the radial outside of the rotating roller 10 on the ball 27 and the push rod 23, so that the push rod 23 drives the arc plate 15 to move toward the outside of the mouth of the material trough 16, until the outer arc surface of the arc plate 15 and the roller surface of the rotating roller 10 are on the same circumferential surface, and at this time, the spring 24 will be compressed by the limit ring 25 to accumulate elastic potential energy, and the arc plate 15 will concentrate the material in the material trough 16. The crystals are pushed out to the outside of the material trough 16 together with the precipitated crystals, and fall into the circulation pipe 13 through the blanking channel. At this time, the upper edge of the scraper plate 12 will begin to contact the outer curved surface of the arc plate 15, thereby scraping off the crystals adhered to the surface of the arc plate 15 and making the crystals fall into the blanking channel. As the rotating roller 10 continues to rotate, the ball 27 will roll from the surface of the protrusion 22 to the inner ring wall of the annular accommodating cavity 21, and the elastic potential energy of the spring 24 is released, so that the limit ring 25 moves toward the radial inner side of the rotating roller 10, so that the arc plate 15 retracts into the material trough 16 and starts the next operation.

[0034] During the process, when the rotating roller 10 rotates, an arc plate 15 that rotates and approaches the scraper plate 12 will be driven by the liquid pushing mechanism to move toward the outer side of the roller surface of the rotating roller, so that the arc plate 15 can push the concentrated material and the precipitated crystals in the material tank 16 out of the material tank, and through the scraping of the scraper plate 12, the concentrated material and the precipitated crystals can fall into the circulation pipe 13 from the material dropping channel until they fall into the crystallizer 2, so that the crystals and the concentrated material entering from the concentrated material inlet can be separated. In addition, after the arc plate 15 moves toward the outer side of the material tank mouth, the outer arc surface of the arc plate 15 and the roller surface of the rotating roller will be on the same circumferential surface, so that the scraper plate 12 can completely scrape off the concentrated material and the precipitated crystals in the material tank 16, thereby improving the crystal preparation efficiency.

[0035] The concentrated material and crystals that fall into the crystallizer 2 through the circulation pipe 13 will enter the crystallizer 2. The supernatant of the concentrated material is located on the upper side of the inner cavity of the crystallizer 2, and the supernatant is transported to the material pump by an external delivery pump. Then the material pump transports the supernatant to the evaporator for circulating crystallization, and the crystals will be deposited at the bottom of the crystallizer 2. Fine crystals will continue to grow. After the crystallization is completed, the control valve of the discharge port 1 is opened to discharge the crystals, and the crystals are collected at the same time.

[0036] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0037] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. An integrated evaporation and crystallization device, characterized in that: include: A crystallizer (2) having a material circulation outlet (3) on its outer wall, and a discharge port (1) at the bottom of the crystallizer (2); A gas-liquid separator (6) is fixedly connected to the upper end of the crystallizer (2), the outer wall of the gas-liquid separator (6) is provided with a concentrated material inlet (4), and the lower end of the gas-liquid separator (6) is fixedly connected to a circulation pipe (13) extending vertically toward the inside of the crystallizer (2); A surrounding plate (11) is fixedly connected to the inner walls of the inner cavity of the gas-liquid separator (6), a sealing baffle (8) is fixedly connected to the inner cavity wall of the gas-liquid separator (6) on the side adjacent to the concentrated material inlet (4), and a scraper plate (12) is provided at one end of the sealing baffle (8) away from the concentrated material inlet (4) and is bent upward, and the outer walls of the sealing baffle (8) on both sides are respectively fixedly connected to the surfaces of the two surrounding plates (11), so that a material storage cavity (9) is formed between the sealing baffle (8), the scraper plate (12) and the two surrounding plates (11), and a material drop channel is formed between the scraper plate (12) and the inner cavity wall of the gas-liquid separator (6) on the side away from the concentrated material inlet (4); A rotating roller (10) is rotatably connected to the material storage chamber (9); the rotating roller (10) is driven to rotate by a rotating unit installed on the gas-liquid separator (6); and the scraper plate (12) is in contact with the roller surface of the rotating roller (10).

2. The integrated evaporation and crystallization equipment according to claim 1, characterized in that: An end cover (7) is provided at the top of the gas-liquid separator (6), and a gas phase outlet is provided on the end cover (7).

3. The integrated evaporation and crystallization equipment according to claim 1, characterized in that: One end of the sealing baffle (8) extends to the inner edge of the concentrated material inlet (4).

4. The integrated evaporation and crystallization equipment according to claim 1, characterized in that: The upper side of the scraper plate (12) facing away from the rotating roller (10) is in a slope shape.

5. The integrated evaporation and crystallization equipment according to claim 1, characterized in that: The rotating unit comprises a rotating shaft (14) horizontally penetrated through the two enclosures (11), the rotating shaft (14) being rotatably connected to the enclosures (11) and the gas-liquid separator (6), and one end of the rotating shaft (14) passing through the gas-liquid separator (6), a reduction motor (5) being mounted on the outer wall of the gas-liquid separator (6), the reduction motor (5) being drivingly connected to the rotating shaft (14), a rotating disk (29) being embedded on one end surface of the rotating roller (10), and the rotating disk (29) being detachably connected to the rotating roller (10), The rotating disk (29) is fixedly sleeved on the periphery of the rotating shaft (14); a fixed sleeve (20) is rotatably penetrated through the other end surface of the rotating roller (10); a sleeve hole (18) is coaxially opened on the rotating roller (10) for the fixed sleeve (20) to freely pass through; the rotating shaft (14) is coaxially penetrated in the fixed sleeve (20) and is freely rotatable; a connecting disk (17) is coaxially fixedly connected to one end of the fixed sleeve (20) away from the rotating disk (29); and the connecting disk (17) is embedded in one of the enclosure plates (11).

6. The integrated evaporation and crystallization equipment according to claim 5, characterized in that: The circumference of the rotating roller (10) is provided with a plurality of recessed material grooves (16) arranged in an array along its axial direction. An arc plate (15) is engaged in the inner cavity of the material groove (16). The arc plate (15) slides freely in the radial direction of the rotating roller (10) in the material groove (16). The rotating roller (10) is provided with a plurality of liquid pushing mechanisms. The liquid pushing mechanisms are used to drive one of the arc plates (15) adjacent to the scraper plate (12) to move toward the outer side of the mouth of the material groove (16) when the rotating roller (10) rotates, until the outer arc surface of the arc plate (15) and the roller surface of the rotating roller (10) are located on the same circumferential surface.

7. The integrated evaporation and crystallization equipment according to claim 6, characterized in that: The liquid pushing mechanism comprises a push rod (23) vertically fixed to a surface of the arc plate (15) facing the radial inner side of the rotating roller (10); a mounting hole (28) for the push rod (23) to be slidably inserted is provided in the rotating roller (10); the mounting hole (28) is connected to the sleeve hole (18); an annular accommodating cavity (21) is provided on the periphery of the fixed sleeve (20); a protrusion (22) is fixed to the fixed sleeve (20); the protrusion (22) is located in the annular accommodating cavity (21); an end of the push rod (23) away from the arc plate (15) is correspondingly connected to the surface of the protrusion (22) and the inner wall of the annular accommodating cavity (21).

8. The integrated evaporation and crystallization equipment according to claim 7, characterized in that: A ball (27) is rotatably embedded at the end of the push rod (23); when the rotating roller (10) rotates, the ball (27) alternately rolls in contact with the surface of the convex block (22) and the inner wall of the annular accommodating cavity (21).

9. The integrated evaporation and crystallization equipment according to claim 7, characterized in that: The rotating roller (10) is provided with a mounting cavity (19) which is connected with the mounting hole (28) and the material trough (16); a stop block (26) is fixedly connected to a side opening of the mounting cavity (19) facing the roller surface of the rotating roller (10); a through hole is provided on the end surface of the stop block (26) for the push rod (23) to pass freely; a limit ring (25) is fixedly mounted on the portion of the push rod (23) that penetrates into the mounting cavity (19); and an elastic member is provided between the limit ring (25) and the stop block (26).

10. The integrated evaporation and crystallization equipment according to claim 9, characterized in that: The elastic member is a spring (24) sleeved around the periphery of the push rod (23), and the two ends of the spring (24) in the elastic force direction elastically abut against the limit ring (25) and the stop block (26) respectively.

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