MVR evaporation and multi-stage countercurrent heat exchange device for low-temperature crystallization of basic copper carbonate

Abstract

The application relates to the technical field of heating devices, in particular to an MVR evaporation and multi-stage countercurrent heat exchange device for low-temperature crystallization of basic copper carbonate, which comprises an evaporation tank for solution evaporation and a heat exchange tank for heat exchange, a circulating assembly is arranged outside the evaporation tank, the circulating assembly comprises a flow guide pipe arranged outside the evaporation tank and used for conveying steam, and a compressor is arranged outside the flow guide pipe. Through the arrangement of the circulating assembly, the steam gradually flows upwards in the heat exchange tank, the basic copper carbonate solution flows downwards in the heat exchange tank and contacts the steam, the steam can heat the basic copper carbonate solution, the initial temperature of the basic copper carbonate solution can be increased to a certain extent, the evaporation efficiency of the basic copper carbonate solution can be increased to a certain extent, the heat utilization efficiency can be effectively improved through full utilization of the heat, and the additional loss of the heat can be reduced.

Description

Technical Field

[0001] This invention relates to the field of heating device technology, and in particular to an MVR evaporation and multi-stage countercurrent heat exchange device for low-temperature crystallization of basic copper carbonate. Background Technology

[0002] Basic copper carbonate is an important inorganic compound that combines the properties of natural minerals with a wide range of industrial and domestic applications. It is usually made from soluble copper salts (such as copper sulfate) and soluble carbonates (such as sodium carbonate) as raw materials. After preparing copper sulfate and sodium carbonate solutions of a certain concentration, they are mixed according to the most appropriate reaction temperature and raw material ratio. After the precipitation is complete, the mixture is filtered under reduced pressure, washed and dried to obtain the basic copper carbonate product.

[0003] Low-temperature crystallization technology for basic copper carbonate is a process for preparing high-purity products with specific crystal forms by controlling reaction conditions (such as temperature, pH value, raw material ratio, etc.). The reaction temperature is usually controlled at 70-80℃, and then the product is obtained by centrifugation and drying. In existing technologies, evaporative heat exchangers suitable for low-temperature crystallization of basic copper carbonate can improve the heat utilization efficiency of steam to a certain extent by recycling the steam during operation. However, in actual operation, the steam generated from the evaporation of basic copper carbonate solution will not only experience a temperature drop and heat loss during secondary recycling, but also suffer from incomplete contact between the steam and the basic copper carbonate solution, resulting in low heat exchange efficiency between the steam and the basic copper carbonate solution, which in turn affects the energy utilization efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide an MVR evaporation and multi-stage countercurrent heat exchange device for low-temperature crystallization of basic copper carbonate, which can mix and stir the steam and basic copper carbonate solution inside the heat exchange tank by rotating the baffle plate, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an MVR evaporation and multi-stage countercurrent heat exchange device for low-temperature crystallization of basic copper carbonate, comprising an evaporation tank for solution evaporation and a heat exchange tank for heat exchange, a circulation assembly disposed on the outside of the evaporation tank, the circulation assembly comprising a guide pipe disposed on the outside of the evaporation tank for conveying steam, a compressor disposed on the outside of the guide pipe, the compressor being connected to the inside of the heat exchange tank, an inlet pipe fixedly connected to the upper outer surface of the heat exchange tank, an evaporation assembly for solution evaporation disposed on the inside of the evaporation tank, a suction pipe fixedly connected to the lower side of the outer surface of the heat exchange tank, a pressurization pipe fixedly connected between the suction pipe and the evaporation pipe, and a countercurrent assembly for steam circulation heating disposed on the inside of the heat exchange tank.

[0006] Preferably, a booster pump is fixedly connected to the rear end of the suction tube, a support tube is fixedly connected to the upper outer surface of the evaporation tube, the upper end of the support tube is connected to the upper side of the drainage tube, the lower side of the drainage tube is connected to the inside of the evaporation tank, a flow divider is fixedly connected to the inner surface of the evaporation tube, the upper end of the flow divider is fixedly connected to the lower fixed plate, and a gas collection hood is fixedly connected to the inner surface of the evaporation tank.

[0007] Preferably, the evaporation assembly includes a fixing plate fixedly connected to the inner surface of the evaporation tank. There are two sets of fixing plates arranged in parallel vertically. An evaporation tube is fixedly connected to the outer surface of the fixing plate. Both ends of the evaporation tube extend to the outside of the fixing plate. There are several sets of evaporation tubes arranged in a ring array. A liquid outlet pipe is fixedly connected to the lower side of the outer surface of the evaporation tank.

[0008] Preferably, the countercurrent assembly includes a flow equalization plate slidably connected to the inner surface of the heat exchange tank, the outer surface of the flow equalization plate having a mesh hole, the upper outer surface of the flow equalization plate being conical, a flow collector plate being fixedly connected to the inner surface of the heat exchange tank, and the liquid suction pipe penetrating to the inner side of the flow collector plate and being fixedly connected to the flow collector plate.

[0009] Preferably, a support plate is fixedly connected to the inner surface of the heat exchange tank, and a grid is formed through the upper outer surface of the support plate. The number of grids is several and they are arranged in a ring array. A rotating shaft is rotatably connected to the upper outer surface of the support plate, and a guide plate is fixedly connected to the outer surface of the rotating shaft. The guide plate is arranged in a spiral shape. A sealing plate is rotatably connected to the inner surface of the heat exchange tank. A cavity is embedded in the inner side of the guide plate. A baffle is fixedly connected to the inner surface of the cavity. The upper end of the cavity extends through to the upper side of the sealing plate.

[0010] Preferably, a flow-turbulence assembly is provided inside the liquid inlet pipe. The flow-turbulence assembly includes a support frame fixedly connected to the inner surface of the liquid inlet pipe. A rotating shaft is rotatably connected to the outer surface of the support frame. A blade is fixedly connected to the upper side of the outer surface of the rotating shaft. A push rod is fixedly connected to the outer surface of the lower end of the rotating shaft. An electromagnetic sleeve is fixedly connected to the outer surface of the upper end of the rotating shaft. The push rod is located inside the electromagnetic sleeve.

[0011] Preferably, a spiral groove is embedded on the outer side of the rotating shaft, and a spiral sleeve is connected to the rotating shaft through the spiral groove. A movable rod is rotatably connected to the outer side of the spiral sleeve, and a spoiler is fixedly connected to the outer surface of the movable rod. The spoiler is in several groups and arranged in a ring array. A through groove is opened on the outer surface of the spoiler, and a baffle is fixedly connected to the outer surface of the rotating shaft.

[0012] Preferably, a guide groove is embedded in the inner surface of the heat exchange tank, a movable frame is slidably connected to the inner surface of the heat exchange tank, the movable rod is in rotatable contact with the movable frame, a friction wheel is fixedly connected to the outer surface of the movable rod away from the rotating shaft, an anti-slip groove is embedded in the outer surface of the friction wheel, the number of anti-slip grooves is several sets and they are distributed in a ring array, and the number of movable rods, guide grooves and friction wheels are two sets and they are symmetrically distributed.

[0013] Preferably, a driving assembly is provided on the upper side of the flow equalization plate. The driving assembly includes a piston cylinder fixedly connected to the upper side of the inner surface of the heat exchange tank, a piston plate slidably connected to the inner side of the piston cylinder, a piston rod fixedly connected to the lower outer surface of the piston plate, and the lower outer surface of the piston rod fixedly connected to the upper side of the flow equalization plate.

[0014] Preferably, a squeezing sleeve is fixedly connected to the inner surface of the liquid inlet pipe. The squeezing sleeve is annular and made of elastic material. An overflow groove is embedded in the inner side of the heat exchange tank. One end of the overflow groove is connected to the inside of the squeezing sleeve, and the other end extends into the inside of the piston cylinder.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This solution uses a circulation component to allow steam to gradually rise inside the heat exchange tank. As the basic copper carbonate solution flows downward inside the heat exchange tank, it comes into contact with the steam. The steam heats the basic copper carbonate solution, thereby increasing its initial temperature to some extent. This, in turn, improves the evaporation efficiency of the basic copper carbonate solution. Furthermore, by fully utilizing the heat, the solution also improves heat utilization efficiency and reduces additional heat loss.

[0016] 2. This solution incorporates a baffle assembly. The rotation of the baffle plate mixes and stirs the steam and basic copper carbonate solution inside the heat exchange tank, thereby improving the mixing uniformity of the basic copper carbonate solution and steam, and thus increasing the heat exchange efficiency between the steam and the basic copper carbonate solution. At the same time, the movement of the baffle plate can extend the residence time of the steam and basic copper carbonate solution inside the heat exchange tank to a certain extent, allowing sufficient time for heat exchange between the steam and the basic copper carbonate solution, thereby further improving the heat exchange efficiency.

[0017] 3. This solution, by setting up a driving component, uses the deformation of the extrusion sleeve to drive the flow equalization plate to move up and down reciprocally inside the heat exchange tank. The movement of the flow equalization plate not only reduces the risk of mesh blockage, but also disturbs the basic copper carbonate solution and steam inside the heat exchange tank, thereby further improving the distribution uniformity of the basic copper carbonate solution. By reducing the volume of the basic copper carbonate solution, the heating efficiency of the basic copper carbonate solution can be improved, thus increasing the evaporation heat exchange rate of the basic copper carbonate solution. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a top view of the overall structure of the present invention; Figure 4 For the present invention Figure 3 Sectional view along line AA; Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle; Figure 6 For the present invention Figure 4 Enlarged view of point C in the middle; Figure 7 For the present invention Figure 4 Enlarged view of point D; Figure 8 For the present invention Figure 4 Enlarged view of point E in the middle; Figure 9 This is a schematic diagram of the sealing plate and guide plate structure of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 11. Evaporator; 12. Liquid outlet pipe; 13. Support pipe; 14. Drain pipe; 15. Liquid inlet pipe; 16. Heat exchanger; 17. Compressor; 18. Booster pump; 19. Pressurization pipe; 20. Suction pipe; 21. Gas collection hood; 22. Evaporation pipe; 23. Fixing plate; 24. Diverter plate; 25. Collector plate; 26. Support plate; 27. Grille; 28. Sealing plate; 29. ​​Baffle; 30. Cavity; 31. Guide groove 32. Flow equalization plate; 33. Extrusion sleeve; 34. Overflow groove; 35. Paddle blade; 36. Support frame; 37. Mesh; 38. Piston cylinder; 39. Piston plate; 40. Piston rod; 41. Movable rod; 42. Movable frame; 43. Friction wheel; 44. Anti-slip groove; 45. Rotating shaft one; 46. Spiral sleeve; 48. Baffle; 49. Top rod; 50. Electromagnetic sleeve; 51. Rotating shaft two; 52. Through groove; 53. Baffle; 54. Guide plate. Detailed Implementation

[0020] Please see Figures 1 to 9 The present invention provides a technical solution: An MVR evaporation and multi-stage countercurrent heat exchange device for low-temperature crystallization of basic copper carbonate includes an evaporator 11 for solution evaporation and a heat exchange tank 16 for heat exchange. A circulation assembly is provided on the outside of the evaporator 11. The circulation assembly includes a guide pipe 14 for transporting steam on the outside of the evaporator 11. A compressor 17 is provided on the outside of the guide pipe 14. The compressor 17 is connected to the inside of the heat exchange tank 16. An inlet pipe 15 is fixedly connected to the upper outer surface of the heat exchange tank 16. An evaporation assembly for solution evaporation is provided on the inside of the evaporator 11. A suction pipe 20 is fixedly connected to the lower side of the outer surface of the heat exchange tank 16. A pressurization pipe 19 is fixedly connected between the suction pipe 20 and the evaporation pipe 22. A countercurrent assembly for steam circulation heating is provided on the inside of the heat exchange tank 16.

[0021] A booster pump 18 is fixedly connected to the rear end of the suction pipe 20. A support pipe 13 is fixedly connected to the outer surface of the upper end of the evaporation pipe 22. The upper end of the support pipe 13 is connected to the upper side of the drainage pipe 14. The lower side of the drainage pipe 14 is connected to the inside of the evaporation pipe 22. A flow divider 24 is fixedly connected to the inner surface of the evaporation tank 11. The upper end of the flow divider 24 is fixedly connected to the lower fixed plate 23. A gas collection hood 21 is fixedly connected to the inner surface of the evaporation tank 11.

[0022] The evaporation assembly includes a fixing plate 23 fixedly connected to the inner surface of the evaporator 11. There are two sets of fixing plates 23, which are arranged in parallel vertically. An evaporation tube 22 is fixedly connected to the outer surface of the fixing plate 23. Both ends of the evaporation tube 22 extend to the outside of the fixing plate 23. There are several sets of evaporation tubes 22, which are arranged in a ring array. A liquid outlet pipe 12 is fixedly connected to the lower side of the outer surface of the evaporator 11.

[0023] By adopting the above technical solution, when the basic copper carbonate evaporation heat exchanger is working, the basic copper carbonate solution is first injected into the inlet pipe 15. Under the action of gravity, the basic copper carbonate solution flows to the lower side of the heat exchange tank 16. Then, the booster pump 18 draws the basic copper carbonate solution into the suction pipe 20, and injects it into the upper side of the fixing plate 23 inside the evaporation tank 11 through the pressurization pipe 19. The evaporation tank 11 is fixedly supported by the fixing plate 23 for the evaporation tube 22. Then, the evaporation tube 22 is electrically heated, and the basic copper carbonate solution on the upper side of the fixing plate 23 is heated. The solution enters the evaporator tube 22 under gravity. Inside the evaporator tube 22, the basic copper carbonate solution flows downwards in a film-like manner. The contact between the basic copper carbonate solution and the inner wall of the evaporator tube 22 heats and evaporates the solution. Reducing the water content in the basic copper carbonate solution increases its concentration. Some of the vapor inside the evaporator tube 22 flows to the upper side of the fixed plate 23, while the basic copper carbonate solution, after flowing out to the outside of the evaporator tube 22, undergoes flash evaporation due to pressure changes, further generating water vapor. This allows for a further increase in the concentration of the basic copper carbonate solution, reducing the difficulty of crystallization. The concentrated basic copper carbonate solution is then guided to the outside of the evaporation tube 22 through the outlet pipe 12. The flow divider 24 guides and collects the basic copper carbonate solution. The vapor generated by the evaporation of the basic copper carbonate solution is led out to the outside of the evaporation tank 11 through the outlet pipe 14 and injected into the heat exchange tank 16 through the compressor 17. The compressor 17 compresses the vapor, thereby increasing the vapor temperature to a certain extent. Due to the increase in gas temperature, the density decreases, and the vapor gradually flows upward inside the heat exchange tank 16. As the basic copper carbonate solution flows downward inside the heat exchange tank 16, it comes into contact with the vapor. The vapor heats the basic copper carbonate solution, thereby increasing the initial temperature of the basic copper carbonate solution to a certain extent. This, in turn, improves the evaporation efficiency of the basic copper carbonate solution to a certain extent. At the same time, by making full use of heat, the heat utilization efficiency can be effectively improved, and the additional heat loss can be reduced.

[0024] Specifically, such as Figure 4 , Figure 8 and Figure 9 As shown, the countercurrent assembly includes a flow equalization plate 32 that is slidably connected to the inner surface of the heat exchange tank 16. The outer surface of the flow equalization plate 32 is provided with a mesh 37. The upper outer surface of the flow equalization plate 32 is conical. A flow collecting plate 25 is fixedly connected to the inner surface of the heat exchange tank 16. The liquid suction pipe 20 passes through the inner side of the flow collecting plate 25 and is fixedly connected to the flow collecting plate 25.

[0025] A support plate 26 is fixedly connected to the inner surface of the heat exchange tank 16. A grid 27 is provided through the upper outer surface of the support plate 26. The number of grids 27 is several and they are arranged in a ring array. A rotating shaft 51 is rotatably connected to the upper outer surface of the support plate 26. A guide plate 54 is fixedly connected to the outer surface of the rotating shaft 51. The guide plate 54 is arranged in a spiral shape. A sealing plate 28 is rotatably connected to the inner surface of the heat exchange tank 16. A cavity 30 is embedded in the inner side of the guide plate 54. A baffle 29 is fixedly connected to the inner surface of the cavity 30. The upper end of the cavity 30 extends through to the upper side of the sealing plate 28.

[0026] By adopting the above technical solution, in order to improve the uniformity of contact between the basic copper carbonate solution and the steam, a counter-current component is set up. After the basic copper carbonate solution enters the heat exchange tank 16 through the inlet pipe 15, it flows onto the surface of the flow equalization plate 32. The upper side of the flow equalization plate 32 is conical, which guides the basic copper carbonate solution evenly to the surrounding area. The basic copper carbonate solution falls evenly through the mesh 37 on the surface of the flow equalization plate 32. By setting the flow equalization plate 32, the basic copper carbonate solution can be evenly distributed in different positions of the heat exchange tank 16, thereby enabling the steam and the basic copper carbonate solution to mix and contact evenly, thus effectively improving the heat exchange efficiency of the basic copper carbonate solution. The heat exchange tank 16... The support plate 26 supports the rotating shaft 51, which in turn supports the guide plate 54, allowing the guide plate 54 to rotate around the rotating shaft 51. The upper end of the guide plate 54 extends to the upper side of the sealing plate 28. After the basic copper carbonate solution flows to the upper side of the sealing plate 28, it enters the cavity 30 inside the guide plate 54 and flows downward. Meanwhile, the steam flows upward on the outer side of the guide plate 54. During its upward movement, the steam comes into contact with the outer surface of the guide plate 54, heating the guide plate 54 and further heating the basic copper carbonate solution, thereby improving the heat exchange effect between the basic copper carbonate solution and the steam.

[0027] Specifically, such as Figure 4 , Figure 7 and Figure 8 As shown, a flow-turbulence assembly is provided inside the liquid inlet pipe 15. The flow-turbulence assembly includes a support frame 36 fixedly connected to the inner surface of the liquid inlet pipe 15. A rotating shaft 45 is rotatably connected to the outer surface of the support frame 36. A blade 35 is fixedly connected to the upper side of the outer surface of the rotating shaft 45. A push rod 49 is fixedly connected to the lower outer surface of the rotating shaft 45. An electromagnetic sleeve 50 is fixedly connected to the upper outer surface of the rotating shaft 51. The push rod 49 is located inside the electromagnetic sleeve 50.

[0028] The outer side of the rotating shaft 45 is embedded with a spiral groove. The rotating shaft 45 is connected to a spiral sleeve 46 through the spiral groove. The outer side of the spiral sleeve 46 is rotatably connected to a movable rod 41. A spoiler 53 is fixedly connected to the outer surface of the movable rod 41. The spoiler 53 consists of several groups and is arranged in a ring array. A through groove 52 is opened through the outer surface of the spoiler 53. A baffle 48 is fixedly connected to the outer surface of the rotating shaft 45.

[0029] The heat exchange tank 16 has an embedded guide groove 31 on its inner surface. A movable frame 42 is slidably connected to the inner surface of the heat exchange tank 16. The movable rod 41 is in rotatable contact with the movable frame 42. A friction wheel 43 is fixedly connected to the outer surface of the movable rod 41 away from the rotating shaft 45. An anti-slip groove 44 is embedded in the outer surface of the friction wheel 43. The number of anti-slip grooves 44 is several sets and they are arranged in a ring array. The number of movable rods 41, guide grooves 31 and friction wheels 43 are all two sets and they are symmetrically distributed.

[0030] By adopting the above technical solution, the basic copper carbonate solution enters the inlet pipe 15 and impacts the impeller 35. Under the impact force of the water flow, the impeller 35 drives the rotating shaft 45 to rotate. The inlet pipe 15 supports the rotating shaft 45 through the support frame 36. The spiral sleeve 46 is connected to the rotating shaft 45 by a spiral drive. During the rotation, the spiral sleeve 46 reciprocates along the axial direction. During the movement of the spiral sleeve 46, the movable rod 41 moves synchronously. During the movement of the movable rod 41, the movable frame 42 and the friction wheel 43 move synchronously. During the movement of the friction wheel 43, it contacts the inner wall of the guide groove 31. Under the action of friction, the friction wheel 43 drives the movable rod 41 to rotate. The anti-slip grooves 44 on the surface of the friction wheel 43 can effectively improve the friction between the friction wheel 43 and the guide groove 31. During the rotation of the movable rod 41, the baffle 53 on its surface will rotate synchronously. The rotation of the baffle 53 can mix and stir the steam and basic copper carbonate solution inside the heat exchange tank 16, thereby further improving the mixing uniformity of the basic copper carbonate solution and the steam, and thus improving the heat exchange efficiency of the steam and the basic copper carbonate solution. At the same time, the movement of the baffle 53 can prolong the residence time of the steam and the basic copper carbonate solution inside the heat exchange tank 16 to a certain extent, so that the steam and the basic copper carbonate solution have enough time to exchange heat, thereby further improving the heat exchange efficiency. When the electromagnetic sleeve 50 conducts electricity, it will be magnetically attracted and fixed to the top rod 49. The rotating shaft 45 drives the top rod 49 and the rotating shaft 51 to rotate synchronously through the electromagnetic sleeve 50. The rotating shaft 51 drives the guide plate 54 to rotate, which can stir and disturb the steam inside the heat exchange tank 16, thereby further improving the contact effect between the guide plate 54 and the steam.

[0031] Specifically, such as Figure 4 , Figure 5 and Figure 6 As shown, a driving assembly is provided on the upper side of the flow equalization plate 32. The driving assembly includes a piston cylinder 38 fixedly connected to the upper side of the inner surface of the heat exchange tank 16. A piston plate 39 is slidably connected to the inner side of the piston cylinder 38. A piston rod 40 is fixedly connected to the lower outer surface of the piston plate 39. The lower outer surface of the piston rod 40 is fixedly connected to the upper side of the flow equalization plate 32.

[0032] A compression sleeve 33 is fixedly connected to the inner surface of the liquid inlet pipe 15. The compression sleeve 33 is annular and made of elastic material. An overflow groove 34 is embedded in the inner side of the heat exchange tank 16. One end of the overflow groove 34 is connected to the inside of the compression sleeve 33, and the other end extends into the inside of the piston cylinder 38.

[0033] By adopting the above technical solution, when the basic copper carbonate solution enters the inlet pipe 15, it will contact the outer surface of the extrusion sleeve 33. Under the impact of the basic copper carbonate solution, the extrusion sleeve 33 will undergo elastic deformation. When the extrusion sleeve 33 is compressed inward, the gas inside the extrusion sleeve 33 enters the piston cylinder 38 through the overflow groove 34 and pushes the piston plate 39 to slide inside the piston cylinder 38. During the movement of the piston plate 39, it will drive the piston rod 40 to move synchronously. The movement of the piston rod 40 can push the flow equalization plate 32 downward. When the impact force of the basic copper carbonate solution on the extrusion sleeve 33 decreases, the extrusion sleeve 33 moves in the opposite direction. The gas inside the plug cylinder 38 is drawn into the extrusion sleeve 33 through the overflow groove 34. The piston plate 39 moves upward under negative pressure. The deformation of the extrusion sleeve 33 drives the flow equalization plate 32 to move up and down inside the heat exchange tank 16. The movement of the flow equalization plate 32 not only reduces the risk of the mesh 37 being blocked, but also disturbs the basic copper carbonate solution and steam inside the heat exchange tank 16, thereby further improving the uniformity of the distribution of the basic copper carbonate solution. By reducing the volume of the basic copper carbonate solution, the heating efficiency of the basic copper carbonate solution can be improved, thereby increasing the evaporation heat exchange rate of the basic copper carbonate solution.

[0034] Working Principle: When the basic copper carbonate evaporation heat exchanger is working, the basic copper carbonate solution enters the evaporation tube 22 under gravity. Inside the evaporation tube 22, the solution flows downwards in a water film. The contact between the solution and the inner wall of the evaporation tube 22 heats and evaporates the solution. The vapor generated by the evaporation is led out through the guide pipe 14 to the outside of the evaporation tank 11 and injected into the heat exchange tank 16 through the compressor 17. The basic copper carbonate solution is injected into the inlet pipe 15 and flows evenly through the mesh 37 on the surface of the flow equalization plate 32. By setting the flow equalization plate 32, the solution is evenly distributed at different positions in the heat exchange tank 16. The vapor gradually flows upwards inside the heat exchange tank 16. During the downward flow of the basic copper carbonate solution, it comes into contact with the vapor, and the pressure sleeve 33 is compressed. The gas enters the piston cylinder 38 through the overflow groove 34. The deformation of the extrusion sleeve 33 drives the flow equalization plate 32 to move up and down inside the heat exchange tank 16, which can disturb the basic copper carbonate solution and steam inside the heat exchange tank 16, thereby further improving the distribution uniformity of the basic copper carbonate solution. During the upward movement of the steam, it will contact the outer surface of the guide plate 54, which can heat the guide plate 54 and further heat the basic copper carbonate solution. During the movement of the friction wheel 43, it will contact the inner wall of the guide groove 31. During the rotation of the movable rod 41, it will drive the baffle plate 53 on its surface to rotate synchronously. The rotation of the baffle plate 53 can mix and stir the steam and basic copper carbonate solution inside the heat exchange tank 16, thereby further improving the mixing uniformity of the basic copper carbonate solution and steam.

Claims

1. An MVR evaporation and multi-stage countercurrent heat exchange device for low-temperature crystallization of basic copper carbonate, comprising an evaporator (11) for solution evaporation and a heat exchanger (16) for heat exchange, characterized in that: A circulation assembly is provided on the outside of the evaporator (11). The circulation assembly includes a guide pipe (14) for conveying steam on the outside of the evaporator (11). A compressor (17) is provided on the outside of the guide pipe (14). The compressor (17) is connected to the inside of the heat exchange tank (16). An inlet pipe (15) is fixedly connected to the upper outer surface of the heat exchange tank (16). An evaporation assembly for solution evaporation is provided on the inside of the evaporator (11). A suction pipe (20) is fixedly connected to the lower side of the outer surface of the heat exchange tank (16). A pressurization pipe (19) is fixedly connected between the suction pipe (20) and the evaporation pipe (22). A countercurrent assembly for steam circulation heating is provided on the inside of the heat exchange tank (16).

2. The MVR evaporation and multi-stage countercurrent heat exchanger for low-temperature crystallization of basic copper carbonate according to claim 1, characterized in that: A booster pump (18) is fixedly connected to the rear end of the suction tube (20). A support tube (13) is fixedly connected to the outer surface of the upper end of the evaporation tube (22). The upper end of the support tube (13) is connected to the upper side of the drainage tube (14). The lower side of the drainage tube (14) is connected to the inside of the evaporator (11). A flow divider plate (24) is fixedly connected to the inner surface of the evaporation tube (22). The upper end of the flow divider plate (24) is fixedly connected to the lower fixed plate (23). A gas collection hood (21) is fixedly connected to the inner surface of the evaporator (11).

3. The MVR evaporation and multi-stage countercurrent heat exchanger for low-temperature crystallization of basic copper carbonate according to claim 2, characterized in that: The evaporation assembly includes a fixing plate (23) fixedly connected to the inner surface of the evaporator (11). There are two sets of fixing plates (23) arranged in parallel. An evaporation tube (22) is fixedly connected to the outer surface of the fixing plate (23). Both ends of the evaporation tube (22) extend to the outside of the fixing plate (23). There are several sets of evaporation tubes (22) arranged in a ring array. A liquid outlet pipe (12) is fixedly connected to the lower side of the outer surface of the evaporator (11).

4. The MVR evaporation and multi-stage countercurrent heat exchanger for low-temperature crystallization of basic copper carbonate according to claim 3, characterized in that: The countercurrent assembly includes a flow equalization plate (32) that is slidably connected to the inner surface of the heat exchange tank (16). The outer surface of the flow equalization plate (32) is provided with a mesh (37). The upper outer surface of the flow equalization plate (32) is conical. A flow collecting plate (25) is fixedly connected to the inner surface of the heat exchange tank (16). The liquid suction pipe (20) passes through to the inner side of the flow collecting plate (25) and is fixedly connected to the flow collecting plate (25).

5. The MVR evaporation and multi-stage countercurrent heat exchanger for low-temperature crystallization of basic copper carbonate according to claim 4, characterized in that: The heat exchange tank (16) is fixedly connected to a support plate (26) on its inner surface. A grid (27) is provided through the upper outer surface of the support plate (26). The number of grids (27) is several and they are arranged in a ring array. A rotating shaft (51) is rotatably connected to the upper outer surface of the support plate (26). A guide plate (54) is fixedly connected to the outer surface of the rotating shaft (51). The guide plate (54) is arranged in a spiral shape. A sealing plate (28) is rotatably connected to the inner surface of the heat exchange tank (16). A cavity (30) is embedded in the inner side of the guide plate (54). A baffle (29) is fixedly connected to the inner surface of the cavity (30). The upper end of the cavity (30) extends to the upper side of the sealing plate (28).

6. The MVR evaporation and multi-stage countercurrent heat exchanger for low-temperature crystallization of basic copper carbonate according to claim 5, characterized in that: The inlet pipe (15) is provided with a flow turbulence assembly. The flow turbulence assembly includes a support frame (36) fixedly connected to the inner surface of the inlet pipe (15). A rotating shaft (45) is rotatably connected to the outer surface of the support frame (36). A blade (35) is fixedly connected to the upper side of the outer surface of the rotating shaft (45). A push rod (49) is fixedly connected to the lower outer surface of the rotating shaft (45). An electromagnetic sleeve (50) is fixedly connected to the upper outer surface of the rotating shaft (51). The push rod (49) is located inside the electromagnetic sleeve (50).

7. The MVR evaporation and multi-stage countercurrent heat exchanger for low-temperature crystallization of basic copper carbonate according to claim 6, characterized in that: The outer side of the rotating shaft (45) is provided with a spiral groove. The rotating shaft (45) is connected to a spiral sleeve (46) through the spiral groove. The outer side of the spiral sleeve (46) is rotatably connected to a movable rod (41). The outer surface of the movable rod (41) is fixedly connected to a spoiler (53). The spoiler (53) consists of several groups and is arranged in a ring array. The outer surface of the spoiler (53) is provided with a through groove (52). The outer surface of the rotating shaft (45) is fixedly connected to a baffle (48).

8. The MVR evaporation and multi-stage countercurrent heat exchanger for low-temperature crystallization of basic copper carbonate according to claim 7, characterized in that: The heat exchange tank (16) has an embedded guide groove (31) on its inner surface. The heat exchange tank (16) has a movable frame (42) slidably connected to its inner surface. The movable rod (41) is in rotatable contact with the movable frame (42). The outer surface of the movable rod (41) is fixedly connected to a friction wheel (43) on the side away from the rotating shaft (45). The outer surface of the friction wheel (43) has an embedded anti-slip groove (44). The number of anti-slip grooves (44) is several sets and they are arranged in a ring array. The number of movable rods (41), guide grooves (31) and friction wheels (43) are two sets and they are symmetrically distributed.

9. The MVR evaporation and multi-stage countercurrent heat exchanger for low-temperature crystallization of basic copper carbonate according to claim 8, characterized in that: A drive assembly is provided on the upper side of the flow equalization plate (32). The drive assembly includes a piston cylinder (38) fixedly connected to the upper side of the inner surface of the heat exchange tank (16). A piston plate (39) is slidably connected to the inner side of the piston cylinder (38). A piston rod (40) is fixedly connected to the lower outer surface of the piston plate (39). The lower outer surface of the piston rod (40) is fixedly connected to the upper side of the flow equalization plate (32).

10. The MVR evaporation and multi-stage countercurrent heat exchanger for low-temperature crystallization of basic copper carbonate according to claim 9, characterized in that: The inner surface of the liquid inlet pipe (15) is fixedly connected to a squeezing sleeve (33). The squeezing sleeve (33) is annular and made of elastic material. An overflow groove (34) is embedded in the inner side of the heat exchange tank (16). One end of the overflow groove (34) is connected to the inside of the squeezing sleeve (33), and the other end extends into the inside of the piston cylinder (38).

Images