An integrated evaporation and crystallization device

Abstract

The present invention discloses an integrated evaporation and crystallization device, belonging to the technical field of evaporation and crystallization equipment. The integrated evaporation and crystallization device includes a crystallizer, a gas-liquid separator, a circulation pipe, a shroud, a sealing baffle, a scraping plate, and a rotating roller. The rotating roller is driven to rotate by a rotating unit installed on the gas-liquid separator, and the scraping plate is in contact connection with the roller surface of the rotating roller. In the present invention, after the concentrated material enters the gas-liquid separator from the concentrated material inlet, with the rotation of the rotating roller, part of the concentrated material will rotate with the rotating roller, so that the flash evaporation efficiency of the concentrated material is improved. Furthermore, the evaporation amount of the liquid solvent in the concentrated material is increased, and the precipitation amount of crystals is increased. The precipitated crystals are scraped into the blanking channel by the scraping plate and fall into the crystallizer through the circulation pipe for growth. Compared with the prior art, the evaporation amount of the liquid solvent is increased, the flash evaporation efficiency is improved, and it is beneficial to improve the efficiency of crystal precipitation.

Description

Technical Field

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

[0002] Evaporation crystallization is a method for separating and purifying solid substances, which is widely used in the chemical, chemical engineering, pharmaceutical, and food industries. Its basic principle is to evaporate part of the solvent, so that the solute concentration in the solution gradually increases. When the solute concentration reaches the saturation state, the solute will precipitate in the form of crystals.

[0003] Upon retrieval, a utility model patent with the Chinese patent publication number CN203425537U discloses an integrated evaporation crystallization equipment, including a vapor-liquid separator and a crystallizer. 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 discharge port. It 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 prior art, the concentrated material enters the vapor-liquid separator from the feed port of the vapor-liquid separator (referred to as the concentrated material inlet in this application), and then the concentrated material falls into the crystallizer through flash evaporation. Since the concentrated material directly falls into the circulation pipe by gravity from the feed port, that is, the residence time of the concentrated material in the vapor-liquid separator is relatively long, resulting in a relatively short flash evaporation process; in addition, there is more material entering the vapor-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 that most of the concentrated material falls into the crystallizer before it has time to perform flash evaporation. In this way, the liquid solvent amount in the concentrated material is still relatively large, and most of the concentrated material does not produce effective flash evaporation, resulting in a low crystal growth efficiency. Summary of the Invention

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

[0006] The technical solution adopted to solve the above technical problem is as follows:

[0007] An integrated evaporation crystallization equipment, including:

[0008] A crystallizer with a material circulation outlet on the outer wall, and a discharge port is provided at the bottom of the crystallizer;

[0009] A vapor-liquid separator fixedly connected to the upper end of the crystallizer, a concentrated material inlet is provided on the outer wall of the vapor-liquid separator, and a circulation pipe extending vertically towards the inside of the crystallizer is fixedly connected to the lower end of the vapor-liquid separator;

[0010] The baffle plates 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 of one side of the gas-liquid separator adjacent to the concentrated material inlet. At one end of the sealing baffle away from the concentrated material inlet, there is a scraping plate bent upwards. The outer walls on both sides of the sealing baffle are respectively fixedly connected to the surfaces of the two baffle plates, so that a material storage cavity is formed between the sealing baffle, the scraping plate and the two baffle plates. A material falling channel is formed between the scraping plate and the inner cavity wall of the gas-liquid separator on the side away from the concentrated material inlet;

[0011] The rotating roller rotatably connected to the material storage cavity. The rotating roller is driven to rotate by a rotating unit installed on the gas-liquid separator, and the scraping plate is in contact connection with the roller surface of the rotating roller.

[0012] Through the above technical solution, the concentrated material is conveyed from the concentrated material inlet to the gas-liquid separator, and then the concentrated material will enter the material storage cavity formed by the baffle plates, the sealing baffle and the scraping plate for storage. The rotating roller is driven to rotate by the rotating unit. During the rotation process, the roller surface of the rotating roller contacts the concentrated material, so that the concentrated material adheres to the roller surface of the rotating roller and is carried away from the material storage cavity as the roller surface of the rotating roller rotates. In this way, the concentrated material can be heated by the secondary steam in the gas-liquid separator in a small amount, and 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 precipitates to form crystals. The crystals fall into the circulation pipe through the material falling channel and then enter the crystallizer for crystallization. The supernatant in the crystallizer is heated and concentrated again by the material circulation outlet and then conveyed to the concentrated material inlet to realize the cyclic evaporation crystallization of the concentrated material.

[0013] Further, an end cover is provided at the top of the gas-liquid separator, and a gas phase outlet is provided on the end cover.

[0014] Through the above technical solution, the steam formed after the concentrated material on the roller surface of the rotating roller is heated by the secondary steam will enter the next effect body from the gas phase outlet, and then the steam can be recycled.

[0015] Further, one end of the sealing baffle extends to the edge of the inner side opening of the concentrated material inlet.

[0016] Through the above technical solution, when the sealing baffle extends to the edge of the inner side opening of the concentrated material inlet, the concentrated material will quickly disperse after entering the gas-liquid separator from the concentrated material inlet, which is beneficial to the flash evaporation of the concentrated material and reduces the phenomenon of low flash evaporation efficiency caused by the accumulation of the concentrated material.

[0017] Further, the side of the scraping plate facing away from the rotating roller on the upper side is in a slope shape.

[0018] Through the above technical solution, the upper side edge of the scraping plate is relatively sharp, so that when the rotating roller rotates, the edge of the scraping plate can smoothly scrape off the crystals adhering to the roller surface of the rotating roller.

[0019] Further, the rotating unit includes a rotating shaft horizontally passing through the two enclosing plates. The rotating shaft is rotatably connected to the enclosing plates and the gas-liquid separator. 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, and the reduction motor is drivingly connected to the rotating shaft. A rotating disk is embedded on one end face of the rotating roller, and the rotating disk is detachably connected to the rotating roller. The rotating disk is fixedly sleeved on the periphery of the rotating shaft. A fixed sleeve is rotatably passed through the other end face of the rotating roller. The rotating roller is coaxially provided with a sleeve hole for the fixed sleeve to freely pass through. The rotating shaft is coaxially passed through the fixed sleeve and rotates freely. One end of the fixed sleeve away from the rotating disk is coaxially fixedly connected with a connecting disk, and the connecting disk is embedded on one of the enclosing plates.

[0020] Through the above technical solution, when the rotating shaft rotates, it will drive the rotating disk to rotate. Since the rotating disk is connected to the end face of the rotating roller, it will further cause the rotating disk to drive the rotating roller to rotate. And because the fixed sleeve is installed in the sleeve hole and the connecting disk is fixed on one of the enclosing plates, and the fixed sleeve is also rotatably connected to the rotating roller, the fixed sleeve can play a radial supporting role for the rotating roller. Therefore, when the rotating disk drives the rotating roller to rotate, it can drive the rotating roller to rotate. And when the rotating roller rotates, due to the supporting action of the fixed sleeve and the rotating disk, the rotating roller will not shake or cause stress concentration at the connection position with the rotating disk.

[0021] Further, a plurality of concave material grooves are arrayed along the axial direction on the periphery of the rotating roller. An arc-shaped plate is engaged in the inner cavity of the material groove, and the arc-shaped plate freely slides along the radial direction of the rotating roller in the material groove. A plurality of liquid pushing mechanisms are arranged in the rotating roller. The liquid pushing mechanism is used to drive one of the arc-shaped plates adjacent to the scraping plate to move towards the outer side of the mouth of the material groove until the outer arc surface of the arc-shaped plate is on the same circumferential surface as the roller surface of the rotating roller when the rotating roller rotates.

[0022] Through the above technical solution, when the rotating roller rotates, the orifices of the material troughs located in the material storage cavity are all in an open state, that is, the arc-shaped plates in the material troughs are in a state of being retracted into the material troughs, so as to make the orifices of the material troughs in an open state. In this way, when the rotating roller rotates, the concentrated material in the material storage cavity will enter the material troughs and be carried away from the material storage cavity as the rotating roller rotates, that is, the concentrated material in the material troughs moves upward. This will enable the concentrated material in the material storage cavity to be quickly carried away by the rotating roller to the blanking channel, preventing the phenomenon that as the concentrated material continues to be input from the concentrated material inlet and the roller surface of the rotating roller cannot carry away more concentrated material, resulting in the accumulation of concentrated material in the material storage cavity, reducing the flashing efficiency of the concentrated material in the material storage cavity. In addition, by setting the liquid pushing mechanism, when the material trough rotates towards the scraping plate, crystals will precipitate from the concentrated material in the material trough. At this time, the crystal volume is small, resulting in these small crystals being easily attached to the surface of the arc-shaped plate or the surface of the rotating roller and unable to fall into the crystallizer for growth. Therefore, when the material trough rotates to the scraping plate, the liquid pushing mechanism drives the arc-shaped plate to move towards the radial outside of the rotating roller, so that the arc-shaped plate can push the crystals and concentrated material in the material trough to the outside of the material trough, and then the scraping plate can fully scrape off the crystals and concentrated material.

[0023] Further, the liquid pushing mechanism includes a push rod vertically fixed on the surface of the arc-shaped plate facing the radial inner side of the rotating roller. An installation hole for the push rod to slide and fit is provided in the rotating roller. The installation hole communicates with the sleeve hole. A ring-shaped accommodating cavity is provided on the periphery of the fixed sleeve. A convex block is fixed on the fixed sleeve. The convex block is located in the ring-shaped accommodating cavity. The end of the push rod away from the arc-shaped plate is in contact connection with the surface of the convex block and the inner ring wall of the ring-shaped accommodating cavity correspondingly.

[0024] Through the above technical solution, the end of the push rod corresponding to the arc-shaped plate located in the material storage cavity contacts the inner ring wall of the ring-shaped accommodating cavity. When the rotating roller rotates, the arc-shaped plate will approach the scraping plate, so that the end of the push rod will change from contacting the inner ring wall of the ring-shaped accommodating cavity to contacting the surface of the convex block. The convex block will generate a squeezing force on the push rod towards the radial outside of the rotating roller, and then the push rod drives the arc-shaped plate to move towards the radial outside direction of the rotating roller, so that the arc-shaped plate can discharge the concentrated material and crystals in the material trough.

[0025] Further, a ball is rotatably installed at the end of the push rod. When the rotating roller rotates, the ball alternately rolls and contacts the surface of the convex block and the inner ring wall of the ring-shaped accommodating cavity.

[0026] Through the above technical solution, the ball alternately makes rolling contact with the surface of the bump and the inner wall of the annular accommodating cavity, replacing the sliding contact between the end of the push rod and the surface of the bump and the inner wall of the annular accommodating cavity, thereby reducing the wear amount received by the end of the push rod.

[0027] Further, an installation cavity communicating with the installation hole and the material groove is formed in the rotating roller. A stop block is fixedly connected to one side opening of the installation cavity facing the roller surface of the rotating roller. A through hole for the free passage of the push rod is formed in the end face of the stop block. A limiting ring is fixedly sleeved on the part of the push rod penetrating into the installation cavity. An elastic member is arranged between the limiting ring and the stop block.

[0028] Through the above technical solution, when the ball contacts the surface of the bump, the ball will be subjected to the extrusion force of the bump, causing the ball to drive the push rod to move in the radially outer direction of the rotating roller, and causing the limiting ring to squeeze the elastic member. The elastic member begins to accumulate elastic potential energy. When the ball disengages from the contact with the surface of the bump and turns to contact the inner wall of the annular accommodating cavity, the elastic potential energy of the elastic member is released, driving the limiting ring to move in the reverse direction, causing the push rod to move in the radially inner direction of the rotating roller, thereby causing the arc-shaped plate to retract into the material groove and opening the mouth of the material groove.

[0029] Further, the elastic member is a spring wound around the periphery of the push rod, and the two ends of the spring in the direction of the elastic force elastically abut against the limiting ring and the stop block respectively.

[0030] Through the above technical solution, the structure of the spring is simple and it has good elastic deformation ability. Therefore, after the ball disengages from the contact with the bump, the push rod is quickly driven to move in the reverse direction, causing the arc-shaped plate to retract into the material groove.

[0031] The beneficial effects of the present invention are as follows:

[0032] In the present invention, after the concentrated material enters the gas-liquid separator from the concentrated material inlet, with the rotation of the rotating roller, part of the concentrated material will rotate with the rotating roller, improving the flash evaporation efficiency of the concentrated material, thereby increasing the evaporation amount of the liquid solvent in the concentrated material, increasing the precipitation amount of the crystals. The precipitated crystals are scraped into the blanking channel by the scraping plate and fall into the crystallizer through the circulation pipe for growth. Compared with the prior art, the evaporation amount of the liquid solvent is increased, the flash evaporation efficiency is improved, and it is beneficial to improve the efficiency of crystal precipitation;

[0033] In the present invention, by providing a material tank and an arc plate, when the rotating roller rotates, the concentrated material in the material storage cavity can enter the material tank and move upward as the rotating roller rotates, increasing the amount of secondary steam contacted by the concentrated material in the material tank, thereby enhancing the flashing efficiency of the concentrated material. Additionally, when the rotating roller continuously rotates, it can continuously bring the concentrated material in the material storage cavity into the circulation pipe through the material tank after flashing, reducing the phenomenon that some of the concentrated material fails to flash due to the accumulation of the concentrated material.

[0034] In the present invention, when the rotating roller rotates, an arc plate that rotates and approaches the scraping plate is driven by the liquid pushing mechanism to move outward in the direction of the roller surface of the rotating roller, enabling the arc plate to push out the concentrated material and the precipitated crystals in the material tank together from the material tank. Through the scraping of the scraping plate, the concentrated material and the precipitated crystals can fall into the circulation pipe through the blanking channel and finally into the crystallizer, separating the crystals from the concentrated material entering through the concentrated material inlet. Additionally, after the arc plate moves outward in the direction of the outer side of the material tank opening, the outer arc surface of the arc plate and the roller surface of the rotating roller will be on the same circumferential surface, enabling the scraping plate to completely scrape off the concentrated material and the precipitated crystals in the material tank and improving the crystal preparation efficiency. Brief Description of the Drawings

[0035] Figure 1 is the overall structural schematic diagram of an integrated evaporation and crystallization device in the present invention;

[0036] Figure 2 is Figure 1 the schematic diagram of the positional relationship after partial structures are cut open from another perspective;

[0037] Figure 3 is the schematic diagram of the positional relationship after the rotating roller, rotating disk, connecting disk, and arc plate are assembled in the present invention;

[0038] Figure 4 is Figure 3 the exploded decomposition schematic diagram of the structure in;

[0039] Figure 5 is Figure 3 the schematic diagram of the positional relationship after partial structures are cut open from another perspective;

[0040] Figure 6 is the schematic diagram of the positional relationship after the arc plate, push rod, and fixed sleeve are assembled in the present invention;

[0041] Figure 7 is Figure 6 the enlarged schematic diagram of the partial structure at A in;

[0042] Figure 8It is a schematic diagram of the positional relationship after the assembly of the gas-liquid separator, the crystallizer and the sealing baffle in the present invention;

[0043] Figure 9 It is a schematic diagram of the structure of the rotating roller in the present invention;

[0044] Figure 10 is Figure 9 a cross-sectional schematic diagram of the structure in

[0045] Reference numerals:

[0046] 1, discharge port; 2, crystallizer; 3, material circulation outlet; 4, concentrated material inlet; 5, reduction motor; 6, gas-liquid separator; 7, end cover; 8, sealing baffle; 9, material storage cavity; 10, rotating roller; 11, enclosing plate; 12, scraping plate; 13, circulation pipe; 14, rotating shaft; 15, arc plate; 16, material trough; 17, connecting disc; 18, sleeve hole; 19, installation cavity; 20, fixed sleeve; 21, annular accommodating cavity; 22, convex block; 23, push rod; 24, spring; 25, limiting ring; 26, stop block; 27, ball; 28, installation hole; 29, rotating disc. Specific embodiments

[0047] 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.

[0048] As Figures 1-10 shown;

[0049] This embodiment provides an integrated evaporation and crystallization device, including a crystallizer 2 with a discharge port 1 at the bottom. A control valve (not shown in the figure) is 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. The material circulation outlet 3 is connected to an external transfer pump through a pipeline. A gas-liquid separator 6 is welded to the upper end of the crystallizer 2. The gas-liquid separator 6 has an open top and is provided with an end cover 7. A gas phase outlet is provided on the end cover 7. A concentrated material inlet 4 is provided on one outer wall of the gas-liquid separator 6. The concentrated material inlet 4 is connected to an external evaporator and a material pump. The material pump transports the material to the evaporator, and the evaporator heats and concentrates the material. 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 flared shape from top to bottom, and a circulation pipe 13 is welded to the lower port of the gas-liquid separator 6. The lower end of the circulation pipe 13 extends vertically into the interior of the crystallizer 2;

[0050] On the inner wall of one side of the gas-liquid separator 6 adjacent to the concentrated material inlet 4, a sealing baffle 8 is welded. The end of the sealing baffle 8 is fixedly connected to the inner edge of the mouth of the concentrated material inlet 4. In addition, on the inner walls of the opposite sides of the inner cavity of the gas-liquid separator 6, there are welded baffles 11. The two baffles 11 are respectively welded to the two side surfaces in the width direction of the sealing baffle 8, and the welding parts are sealed. At the end of the sealing baffle 8 away from the concentrated material inlet 4, there is provided a scraping plate 12 formed by bending upwards. A material storage cavity 9 is formed between the sealing baffle 8, the scraping plate 12 and the two baffles 11. The concentrated material entering the gas-liquid separator 6 from the concentrated material inlet 4 will enter the material storage cavity 9 for storage. A blanking channel is formed between the scraping plate 12 and the inner cavity wall of the side of the gas-liquid separator 6 away from the concentrated material inlet 4. The blanking channel is in a communicating state with the circulation pipe 13;

[0051] A rotating shaft 14 is horizontally passed through the two baffles 11. The rotating shaft 14 is rotatably connected to the baffle 11 through a bearing, and the rotating shaft 14 is also rotatably connected to the outer wall of the gas-liquid separator 6. One end of the rotating shaft 14 passes through the outer wall of the gas-liquid separator 6. A reduction motor 5 is installed on the outer wall of the gas-liquid separator 6. 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. A rotating roller 10 is arranged between the two baffles 11 or in the material storage cavity 9. A rotating disc 29 is embedded on one end face of the rotating roller 10. The rotating disc 29 is connected to the rotating roller 10 by screws. The rotating disc 29 is fixedly sleeved on the periphery of the rotating shaft 14;

[0052] On the other end face of the rotary roller 10, a fixed sleeve 20 is rotatably inserted. A bearing is fixedly sleeved on the fixed sleeve 20. The rotary roller 10 is rotatably connected to the fixed sleeve 20 through the bearing, and the fixed sleeve 20 has a radial supporting effect on the rotary roller 10. A sleeve hole 18 for the free passage of the fixed sleeve 20 is coaxially provided in the rotary roller 10. A rotating shaft 14 is coaxially inserted into the fixed sleeve 20 and rotates freely. One end of the fixed sleeve 20 away from the rotating disk 29 is coaxially fixedly connected with a connecting disk 17. The connecting disk 17 is embedded in one of the enclosing plates 11. In this way, when the rotating shaft 14 rotates, it drives the rotating disk 29 to rotate. The rotating disk 29 will synchronously drive the rotary roller 10 to rotate. Since the fixed sleeve 20 is fixedly connected to the enclosing plate 11, the fixed sleeve 20 will not rotate. And the rotary roller 10 is rotatably connected to the fixed sleeve 20 through the bearing, so that when the rotary roller 10 rotates, it will not be interfered by the fixed sleeve 20. In this way, when the reduction motor 5 drives the rotating shaft 14 to rotate, it can synchronously drive the rotary roller 10 to rotate. And due to the supporting effect of the fixed sleeve 20 and the rotating disk 29, the rotary roller 10 will not shake during rotation or cause stress concentration at the connection position with the rotating disk 29. In addition, the scraping plate 12 is in contact connection with the roller surface of the rotary roller 10, and the side of the scraping plate 12 facing away from the rotary roller 10 on the upper side is in a slope shape, so that the upper side of the scraping plate 12 is relatively sharp. In this way, when the rotary roller 10 rotates, the edge of the scraping plate 12 can smoothly scrape off the crystals adhering to the roller surface of the rotary roller 10;

[0053] During the process, after the concentrated material enters the gas-liquid separator 6 from the concentrated material inlet 4, with the rotation of the rotary roller 10, part of the concentrated material will rotate with the rotary roller 10, so that the flash evaporation efficiency of the concentrated material is improved. Furthermore, the evaporation amount of the liquid solvent in the concentrated material is increased, the precipitation amount of the crystals is increased, and the precipitated crystals are scraped into the blanking channel by the scraping plate 12 and fall into the crystallizer through the circulation pipe for growth. Compared with the prior art, the evaporation amount of the liquid solvent is increased, the flash evaporation efficiency is improved, which is beneficial to improving the crystal precipitation efficiency.

[0054] 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.

[0055] 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.

[0056] The working principle of this embodiment is as follows:

[0057] The material pump transports the material to the evaporator. The evaporator heats and concentrates the material. The concentrated material after heating and concentration is then transported to the concentrated material inlet 4. 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. 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. In this way, when the reduction 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 trough 16. As the rotating roller 10 rotates, the concentrated material in the material trough 16 is carried away from the material storage chamber 9. During this process, since the amount of concentrated material in the material trough 16 is small, the contact time and contact range with the secondary steam in the gas-liquid separator 6 are increased, thereby improving the flashing 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.

[0058] As the rotating roller 10 rotates (refer to Figure 2 , the rotation direction of the rotating roller 10 is clockwise), when the mouth of the material trough 16 rotates to face downward, the ball 27 will roll from the inner ring wall of the annular accommodating cavity 21 to the surface of the convex block 22. As a result, the convex block 22 generates a thrust on the ball 27 and the push rod 23 toward the radially outer side of the rotating roller 10, causing the push rod 23 to drive the arc-shaped plate 15 to move toward the outer side of the mouth of the material trough 16. Until the outer arc surface of the arc-shaped plate 15 is on the same circumferential surface as the roller surface of the rotating roller 10, and at this time the spring 24 will be compressed by the limiting ring 25 and accumulate elastic potential energy. The arc-shaped plate 15 pushes out the concentrated material and the precipitated crystals in the material trough 16 to the outside of the material trough 16 and falls into the circulation pipe 13 through the blanking channel. At this time, the upper edge of the scraping plate 12 will start to contact the outer arc surface of the arc-shaped plate 15, and then scrape off the crystals adhered to the surface of the arc-shaped plate 15 and make 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 convex block 22 to the inner ring wall of the annular accommodating cavity 21, and the elastic potential energy of the spring 24 is released, causing the limiting ring 25 to move toward the radially inner side of the rotating roller 10, making the arc-shaped plate 15 retract into the material trough 16 and start the next operation.

[0059] During the process, when the rotating roller 10 rotates, an arc-shaped plate 15 that rotates and approaches the scraping plate 12 will be driven by the liquid-pushing mechanism to move towards the outer side of the roller surface of the rotating roller, so that the arc-shaped plate 15 can push the concentrated material and the precipitated crystals in the material tank 16 out of the material tank together. Through the scraping of the scraping plate 12, the concentrated material and the precipitated crystals can fall into the circulation pipe 13 through the blanking 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-shaped plate 15 moves towards the outer side of the material tank opening, the outer arc surface of the arc-shaped plate 15 and the roller surface of the rotating roller will be on the same circumferential surface, so that the scraping plate 12 can completely scrape off the concentrated material and the precipitated crystals in the material tank 16, improving the preparation efficiency of the crystals.

[0060] The concentrated material and crystals falling into the crystallizer 2 from 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 external transfer pump will transfer the supernatant to the material pump, and then the material pump will transfer the supernatant to the evaporator for cyclic crystallization. The crystals will be deposited at the bottom of the crystallizer 2, and the fine crystals will continue to grow. After crystallization is completed, the control valve of the discharge port 1 is opened, and the crystals are discharged while being collected.

[0061] Although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0062] Therefore, the above description is only the preferred embodiment of the present application and is not used to limit the scope of implementation of the present application; that is, all equivalent transformations 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, Comprising: A crystallizer (2) with a material circulation outlet (3) provided on its outer wall, and a discharge port (1) provided at the bottom of the crystallizer (2); A gas-liquid separator (6) fixedly connected to the upper end of the crystallizer (2), a concentrated material inlet (4) provided on the outer wall of the gas-liquid separator (6), and a circulation pipe (13) fixedly connected to the lower end of the gas-liquid separator (6) and vertically extending into the interior of the crystallizer (2); Enclosure plates (11) fixedly connected to the inner walls on both sides of the inner cavity of the gas-liquid separator (6), a sealing baffle (8) fixedly connected to the inner cavity wall of the gas-liquid separator (6) adjacent to the concentrated material inlet (4), a scraping plate (12) formed with an upward bend at one end away from the concentrated material inlet (4), and the outer walls on both sides of the sealing baffle (8) are respectively fixedly connected to the surfaces of the two enclosure plates (11), so that a material storage cavity (9) is formed between the sealing baffle (8), the scraping plate (12) and the two enclosure plates (11), and a blanking channel is formed between the scraping plate (12) and the inner cavity wall of the gas-liquid separator (6) away from the concentrated material inlet (4); A rotating roller (10) rotatably connected in the material storage cavity (9), the rotating roller (10) is driven to rotate by a rotating unit installed on the gas-liquid separator (6), and the scraping plate (12) is in contact connection with the roller surface of the rotating roller (10); The rotating unit includes a rotating shaft (14) horizontally penetrating through the two enclosure plates (11), the rotating shaft (14) is rotatably connected to the enclosure plates (11) and the gas-liquid separator (6), and one end of the rotating shaft (14) penetrates out of the gas-liquid separator (6), a reduction motor (5) is installed on the outer wall of the gas-liquid separator (6), the reduction motor (5) is drivingly connected to the rotating shaft (14), a rotating disk (29) is embedded at one end face of the rotating roller (10), the rotating disk (29) is 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 face of the rotating roller (10), a sleeve hole (18) for the fixed sleeve (20) to freely pass through is coaxially opened in the rotating roller (10), the rotating shaft (14) is coaxially penetrated through the fixed sleeve (20) and rotates freely, and 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 on one of the enclosure plates (11); A plurality of recessed material grooves (16) are axially arrayed along the periphery of the rotating roller (10). An arc-shaped plate (15) is engaged in the inner cavity of the material groove (16). The arc-shaped plate (15) freely slides radially along the rotating roller (10) within the material groove (16). A plurality of liquid-pushing mechanisms are provided inside the rotating roller (10). The liquid-pushing mechanisms are configured to drive, when the rotating roller (10) rotates, one of the arc-shaped plates (15) adjacent to the scraping plate (12) to move towards the outer side of the opening of the material groove (16) until the outer arc surface of the arc-shaped plate (15) and the roller surface of the rotating roller (10) are located on the same circumferential surface. The liquid-pushing mechanism includes a push rod (23) vertically and fixedly connected to a surface of the arc-shaped plate (15) facing the radially inner side of the rotating roller (10). An installation hole (28) for slidably inserting the push rod (23) is formed inside the rotating roller (10). The installation hole (28) communicates with the sleeve hole (18). An annular accommodation cavity (21) is formed on the periphery of the fixed sleeve (20). A convex block (22) is fixedly connected to the fixed sleeve (20). The convex block (22) is located inside the annular accommodation cavity (21). One end of the push rod (23) away from the arc-shaped plate (15) is correspondingly in contact connection with the surface of the convex block (22) and the inner wall of the annular accommodation cavity (21).

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

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

4. The integrated evaporation and crystallization device according to claim 1, wherein, The upper side of the scraping plate (12) facing away from the rotating roller (10) is in a slope shape.

5. The integrated evaporation and crystallization device according to claim 1, wherein, A ball (27) is rotatably installed at the end of the push rod (23). When the rotating roller (10) rotates, the ball (27) alternately makes rolling contact with the surface of the convex block (22) and the inner wall of the annular accommodation cavity (21).

6. The integrated evaporation and crystallization device according to claim 1, characterized in that An installation cavity (19) communicating with the installation hole (28) and the material groove (16) is formed inside the rotating roller (10). A stop block (26) is fixedly connected to the side opening of the installation cavity (19) facing the roller surface of the rotating roller (10). A through hole for the free passage of the push rod (23) is formed on the end face of the stop block (26). A limiting ring (25) is fixedly sleeved on the part of the push rod (23) penetrating into the installation cavity (19). An elastic member is provided between the limiting ring (25) and the stop block (26).

7. The integrated evaporation and crystallization device according to claim 6, characterized in that, The elastic member is a spring (24) wound around the periphery of the push rod (23). Two ends of the spring (24) in the direction of its elastic force elastically abut against the limiting ring (25) and the stop block (26) respectively.

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