Evaporative crystallization device for preparing metal organic framework MVR (Mechanical Vapor Recompression)

Abstract

The utility model discloses an evaporative crystallization device for preparing a metal organic framework (MVR), and relates to the technical field of evaporative crystallization for preparing the MVR, the evaporative crystallization device comprises an evaporator, a separator and a compressor, one side of the evaporator is fixedly provided with an air inlet pipe and an air outlet pipe which are distributed up and down, and the top end of the evaporator is detachably provided with a sealing cover through a bolt; a feeding pipe is fixedly mounted on the sealing cover, a filter screen is detachably mounted in the evaporator, a plurality of evaporation pipes which are annularly distributed are fixedly mounted in the evaporator, a fixing rod is fixedly mounted in the middle of the upper surface of the filter screen, a cleaning assembly is mounted in the filter screen and comprises a gear ring, and the gear ring is rotationally mounted in the filter screen; a roller brush is rotatably mounted on the inner wall of the toothed ring, a bearing is fixedly mounted on the fixed rod, and by arranging the cleaning assembly, when the filter screen needs to be cleaned, the cleaning assembly can be used for cleaning meshes of the filter screen, and the situation that the meshes of the filter screen are blocked, and then the filtering and liquid leakage efficiency of a solution is affected is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporation crystallization for MVR preparation, in particular to an evaporation crystallization device for preparing metal-organic framework by MVR. Background Technique

[0002] Metal-Organic Frameworks (MOFs) are a new type of porous material, which are three-dimensional network structures formed by the self-assembly of metal ions or clusters and organic ligands. Due to their high specific surface area, adjustable pore size and chemical functionality, MOFs show broad application prospects in the fields of catalysis, gas storage and separation, drug delivery, etc. The MVR (Mechanical Vapor Recompression) evaporation crystallization device is an efficient evaporation technology. It compresses the secondary steam generated during the evaporation process through a mechanical steam compressor and re-introduces it into the evaporator as a heat source, reducing the dependence on external steam sources, improving the thermal efficiency, reducing energy consumption and operating costs. This technology is particularly suitable for the evaporation crystallization process of high-temperature, high-pressure and high-viscosity materials.

[0003] When the solution enters the evaporator, it will evenly leak into the evaporation tube through the filter screen. At the same time, the filter screen will filter out the impurities in the solution. However, in the existing evaporation crystallization device for preparing metal-organic framework by MVR, the evaporator does not have a structure for cleaning the filter screen, and the mesh holes of the filter screen are easily blocked, thereby affecting the filtering and liquid leakage efficiency of the solution. In view of the above problems, the inventor proposes an evaporation crystallization device for preparing metal-organic framework by MVR to solve the above problems. Content of the Utility Model

[0004] In order to solve the problem that in the existing evaporation crystallization device for preparing metal-organic framework by MVR, the evaporator does not have a structure for cleaning the filter screen, and the mesh holes of the filter screen are easily blocked, thereby affecting the filtering and liquid leakage efficiency of the solution; the purpose of the utility model is to provide an evaporation crystallization device for preparing metal-organic framework by MVR.

[0005] To solve the above technical problems, the present utility model adopts the following technical solutions: An evaporation crystallization device for the preparation of metal-organic framework MVR includes an evaporator, a separator, and a compressor. An intake pipe and an outlet pipe are fixedly installed on one side of the evaporator in an up-and-down distribution. The top of the evaporator is detachably installed with a sealing cover through bolts. A feed pipe is fixedly installed on the sealing cover. A filter screen is detachably installed inside the evaporator. A plurality of evaporation pipes are fixedly installed inside the evaporator in a circular distribution. A fixing rod is fixedly installed in the middle of the upper surface of the filter screen. A cleaning component is installed inside the filter screen. The cleaning component includes a toothed ring, and the toothed ring is rotatably installed inside the filter screen. A roller brush is rotatably installed on the inner wall of the toothed ring, and the bristles of the roller brush are in contact with the mesh holes of the filter screen. A bearing is fixedly installed on the fixing rod, and one end of the roller brush is rotatably connected to the outer ring of the bearing.

[0006] Preferably, a crown gear is fixedly installed on the upper surface of the filter screen. A driving gear is fixedly installed at one end of the roller brush, and the driving gear meshes with the crown gear. A small gear is rotatably installed inside one side of the filter screen, and the small gear meshes with the toothed ring. A rotating shaft is fixedly installed on the upper surface of the small gear, and a clamping groove is opened at the top end of the rotating shaft.

[0007] Preferably, a motor is fixedly installed on the sealing cover. A driving shaft is fixedly installed at the output end of the motor. A clamping block is fixedly installed at the bottom end of the driving shaft, and the clamping block can be clamped in the clamping groove at the top end of the rotating shaft.

[0008] Preferably, the compressor is internally connected to the evaporator through the intake pipe. The evaporator is connected to the separator through the outlet pipe. The separator and the compressor are connected through an air delivery pipe. A deflector is fixedly installed at the top end of the fixing rod, and the deflector is arc-shaped.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0010] 1. In the present utility model, by setting the cleaning component, when it is necessary to clean the filter screen, the cleaning component can be used to clean the mesh holes of the filter screen, preventing the mesh holes of the filter screen from being blocked, thereby affecting the filtering and liquid leakage efficiency of the solution;

[0011] 2. In the present utility model, the detachable sealing cover and filter screen are convenient for cleaning the impurities inside the filter screen and replacing the filter screen. The driving shaft is clamped in the clamping groove on the rotating shaft through the clamping block, which is convenient for the driving shaft to be separated from and connected to the rotating shaft when the sealing cover is disassembled. Description of the Drawings

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 Structural schematic diagram of the evaporator of the present invention;

[0014] Figure 2 Internal structural schematic diagram of the evaporator of the present invention;

[0015] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at position A in the present invention;

[0016] Figure 4 Cross-sectional structural schematic diagram of the filter screen of the present invention;

[0017] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at position B in the present invention;

[0018] Figure 6 Overall structural schematic diagram of the evaporation crystallization device for MVR preparation of the present invention.

[0019] In the figure: 1. Evaporator; 11. Air inlet pipe; 12. Air outlet pipe; 2. Sealing cover; 21. Feed pipe; 3. Motor; 4. Filter screen; 41. Deflector; 42. Fixed rod; 43. Bearing; 5. Evaporation tube; 6. Cleaning assembly; 61. Drum brush; 62. Tooth ring; 63. Driving gear; 64. Crown gear; 65. Rotating shaft; 651. Card slot; 66. Pinion gear; 7. Driving shaft; 71. Block. Detailed implementation manners

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0021] Embodiment: As Figures 1-6As shown in the figure, the utility model provides an evaporation crystallization device for the preparation of metal-organic framework by MVR, which includes an evaporator 1, a separator and a compressor. An air inlet pipe 11 and an air outlet pipe 12 are fixedly installed on one side of the evaporator 1 in an up-and-down distribution. The top of the evaporator 1 is detachably installed with a sealing cover 2 through bolts. A feed pipe 21 is fixedly installed on the sealing cover 2. A filter screen 4 is detachably installed in the evaporator 1. A plurality of evaporation pipes 5 are fixedly installed in the evaporator 1 in an annular distribution. A fixing rod 42 is fixedly installed in the middle of the upper surface of the filter screen 4. A cleaning component 6 is installed in the filter screen 4. The cleaning component 6 includes a toothed ring 62, and the toothed ring 62 is rotatably installed in the filter screen 4. A drum brush 61 is rotatably installed on the inner wall of the toothed ring 62, and the bristles of the drum brush 61 are in contact with the mesh holes of the filter screen 4. A bearing 43 is fixedly installed on the fixing rod 42, and one end of the drum brush 61 is rotatably connected to the outer ring of the bearing 43. First, the solution enters the evaporator 1 through the feed pipe 21. The filter screen 4 in the evaporator 1 filters the solution and makes the solution evenly leak into the evaporation pipes 5. High-temperature steam enters the evaporator 1 through the air inlet pipe 11 and performs falling-film evaporation on the flowing solution in the evaporation pipes 5. When the solution leaves the evaporation pipes 5, most of the water in the solution is evaporated, and a highly viscous concentrated solution is obtained and collected at the bottom of the evaporator 1 for crystallization. The evaporated water in the solution forms water vapor and a mixed gas, which enters the separator through the air outlet pipe 12. The separator cools and further separates the mixed gas. The steam rises and enters the compressor. The compressor increases the pressure and temperature of the steam, making the secondary steam become fresh steam and enter the evaporator 1 through the air inlet pipe 11 for recycling, thereby reducing the dependence on an external steam source, improving the thermal efficiency, and reducing the energy consumption and operating cost. When it is necessary to clean the filter screen 4, the toothed ring 62 drives the drum brush 61 to rotate around the fixing rod 42 to clean the mesh holes of the filter screen 4 and prevent the mesh holes of the filter screen 4 from being blocked, thereby affecting the filtering and liquid leakage efficiency of the solution.

[0022] A crown gear 64 is fixedly installed on the upper surface of the filter screen 4. A driving gear 63 is fixedly installed at one end of the drum brush 61, and the driving gear 63 meshes with the crown gear 64.

[0023] By adopting the above technical solution, when the drum brush 61 rotates, the driving gear 63 meshes with the crown gear 64 to drive the drum brush 61 to rotate self.

[0024] A small gear 66 is rotatably installed inside one side of the filter screen 4, and the small gear 66 meshes with the toothed ring 62.

[0025] By adopting the above technical solution, the small gear 66 drives the toothed ring 62 to rotate.

[0026] A rotating shaft 65 is fixedly installed on the upper surface of the small gear 66, and a clamping groove 651 is opened at the top of the rotating shaft 65.

[0027] By adopting the above technical solution, the rotating shaft 65 drives the small gear 66 to rotate.

[0028] A motor 3 is fixedly installed on the sealing cover 2, and a driving shaft 7 is fixedly installed at the output end of the motor 3.

[0029] By adopting the above technical solution, the motor 3 drives the driving shaft 7 to rotate.

[0030] A clamping block 71 is fixedly installed at the bottom end of the driving shaft 7, and the clamping block 71 can be clamped in the clamping groove 651 at the top end of the rotating shaft 65.

[0031] By adopting the above technical solution, the driving shaft 7 is clamped in the clamping groove 651 on the rotating shaft 65 through the clamping block 71, which facilitates the separation of the driving shaft 7 from the rotating shaft 65 when the sealing cover 2 is disassembled, and the driving shaft 7 drives the rotating shaft 65 to rotate.

[0032] The compressor is internally connected to the evaporator 1 through the intake pipe 11, the evaporator 1 is connected to the separator through the outlet pipe 12, and the separator and the compressor are connected through the delivery pipe.

[0033] By adopting the above technical solution, the evaporated water in the solution forms water vapor and the mixed gas enters the separator through the outlet pipe 12. The separator cools and further separates the mixed gas. The steam rises and enters the compressor. The compressor increases the pressure and temperature of the steam, making the secondary steam become fresh steam and enter the evaporator 1 through the intake pipe 11 for recycling, thereby reducing the dependence on the external steam source, improving the thermal efficiency, and reducing the energy consumption and operating cost.

[0034] A deflector 41 is fixedly installed at the top end of the fixed rod 42, and the deflector 41 is arc-shaped.

[0035] By adopting the above technical solution, the deflector 41 can evenly distribute the solution on the filter screen 4.

[0036] Working principle: When the utility model is in use, first, the solution enters the evaporator 1 through the feed pipe 21. The deflector plate 41 can evenly distribute the solution on the filter screen 4. The filter screen 4 in the evaporator 1 filters the solution and makes the solution evenly leak into the evaporation tube 5. The high-temperature steam enters the evaporator 1 through the inlet pipe 11 and performs falling film evaporation on the flowing solution in the evaporation tube 5. When the solution leaves the evaporation tube 5, most of the water in the solution is evaporated to obtain a highly viscous concentrated solution, which is collected at the bottom of the evaporator 1 for crystallization. The evaporated water in the solution forms water vapor and mixed gas, which enter the separator through the outlet pipe 12. The separator cools and further separates the mixed gas. The steam rises and enters the compressor. The compressor increases the pressure and temperature of the steam, making the secondary steam become fresh steam and enter the evaporator 1 through the inlet pipe 11 for recycling, thereby reducing the dependence on external steam sources, improving the thermal efficiency, and reducing the energy consumption and operating costs;

[0037] When it is necessary to clean the filter screen 4, the motor 3 is used to drive the drive shaft 7 to rotate. The drive shaft 7 drives the rotating shaft 65 to rotate. The rotating shaft 65 drives the small gear 66 to rotate. The small gear 66 drives the toothed ring 62 to rotate. The toothed ring 62 drives the drum brush 61 to rotate around the fixed rod 42 as the axis. When the drum brush 61 rotates, through the engagement of the drive gear 63 and the crown gear 64, the drum brush 61 is driven to rotate self - sufficiently to clean the mesh holes of the filter screen 4, preventing the mesh holes of the filter screen 4 from being blocked, and thus affecting the filtering and liquid leakage efficiency of the solution. The detachable sealing cover 2 and the filter screen 4 are convenient for cleaning the impurities in the filter screen 4 and replacing the filter screen 4. The drive shaft 7 is clamped in the clamping groove 651 on the rotating shaft 65 through the clamping block 71, which is convenient for the drive shaft 7 to be detached from and connected to the rotating shaft 65 when the sealing cover 2 is disassembled.

[0038] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and its equivalent technologies, the present utility model also intends to include these changes and modifications.

Claims

1. An evaporation crystallization device for preparing a metal organic framework (MVR), comprising an evaporator (1), a separator and a compressor, characterized in that: An air inlet pipe (11) and an air outlet pipe (12) are fixedly mounted on one side of the evaporator (1), which are distributed up and down. A sealing cover (2) is detachably mounted on the top of the evaporator (1) by means of bolts. A feed pipe (21) is fixedly mounted on the sealing cover (2). A filter screen (4) is detachably mounted inside the evaporator (1). A plurality of evaporation tubes (5) distributed in an annular manner are fixedly mounted inside the evaporator (1). A fixing rod is fixedly mounted on the middle of the upper surface of the filter screen (4). (42), a cleaning assembly (6) is installed in the filter (4), the cleaning assembly (6) comprises a gear ring (62), and the gear ring (62) is rotatably installed in the filter (4), a roller brush (61) is rotatably installed on the inner wall of the gear ring (62), and the bristles of the roller brush (61) are in contact with the mesh of the filter (4), a bearing (43) is fixedly installed on the fixing rod (42), and one end of the roller brush (61) is rotatably connected to the outer ring of the bearing (43).

2. The evaporation crystallization device for preparing a metal organic framework MVR according to claim 1, characterized in that: A crown gear (64) is fixedly mounted on the upper surface of the filter screen (4), a driving gear (63) is fixedly mounted on one end of the roller brush (61), and the driving gear (63) is meshed with the crown gear (64).

3. The evaporation crystallization device for preparing a metal organic framework MVR according to claim 1, characterized in that: A small gear (66) is rotatably mounted inside one side of the filter screen (4), and the small gear (66) is meshed with the gear ring (62).

4. The evaporation crystallization device for preparing a metal organic framework MVR according to claim 3, characterized in that: A rotating shaft (65) is fixedly mounted on the upper surface of the pinion gear (66), and a clamping groove (651) is provided at the top end of the rotating shaft (65).

5. The evaporation crystallization device for preparing a metal organic framework MVR according to claim 1, characterized in that: A motor (3) is fixedly mounted on the sealing cover (2), and a driving shaft (7) is fixedly mounted on the output end of the motor (3).

6. The evaporation crystallization device for preparing a metal organic framework MVR according to claim 5, characterized in that: A clamping block (71) is fixedly mounted on the bottom end of the driving shaft (7), and the clamping block (71) can be clamped in a clamping groove (651) at the top end of the rotating shaft (65).

7. The evaporation crystallization device for preparing a metal organic framework MVR according to claim 1, characterized in that: The compressor is connected to the interior of the evaporator (1) via an air inlet pipe (11), the evaporator (1) is connected to the separator via an air outlet pipe (12), and the separator is connected to the compressor via an air supply pipe.

8. The evaporation crystallization device for preparing a metal organic framework MVR according to claim 1, characterized in that: A guide plate (41) is fixedly mounted on the top end of the fixing rod (42), and the guide plate (41) is arranged in an arc shape.

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