MVR (Mechanical Vapor Recompression) evaporating crystallizer

Abstract

The utility model relates to the field of evaporative crystallization, and discloses an MVR (Mechanical Vapor Recompression) evaporative crystallizer which comprises a crystallizing tank, a liquid storage tank fixedly communicated with the bottom end of the crystallizing tank, a supporting frame fixedly connected with the bottom end of the liquid storage tank, and a crystallizing assembly and a separating assembly which are arranged in the crystallizing tank, an evaporation assembly is arranged on one side of the exterior of the crystallizing tank; the crystallizing assembly comprises a fixed rod fixedly connected to the top in the crystallizing tank, and one end of the peripheral wall of the fixed rod is rotationally connected with a rotating sleeve; according to the solid-liquid separation device, the effect of improving the solid-liquid separation efficiency is achieved, a second transmission rod is driven by a motor to rotate, then a rotating sleeve, a connecting rod and a scraper are driven to rotate through mutual cooperation of the second transmission rod, a first conical tooth and a second conical tooth, the scraper stirs a solution, and crystallization and separation of the solution are accelerated; meanwhile, the scraper rotates to scrape crystal particles attached to the inner wall of the filter, and the problem that the evaporative crystallization efficiency of the device is difficult to effectively improve is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporation crystallization, in particular to an MVR evaporation crystallizer. Background Art

[0002] MVR is the abbreviation of mechanical vapor recompression. MVR evaporator is an energy-saving technology that reuses the energy of the secondary steam it produces, thereby reducing the demand for external energy.

[0003] The patent with publication number CN218357404U discloses an MVR evaporator crystallizer, including an evaporator crystallizer body and a condenser, wherein an exhaust pipe is fixedly connected to the top of the evaporator crystallizer body, a delivery pipe is arranged at one end of the exhaust pipe, one end of the delivery pipe is fixedly connected to one end of the exhaust pipe, the other end of the delivery pipe passes through the bottom of the condenser and extends vertically downward, a filter assembly is fixedly connected to the bottom of the condenser, and a group of support legs are fixedly connected to the bottom of the condenser.

[0004] The device is designed with a conveying pipe. The steam generated during the operation of the evaporator crystallizer body can pass through the exhaust pipe and enter the conveying pipe. The condensation plate arranged inside the condenser can condense the steam in the conveying pipe. The condensed steam is converted into liquid condensate, which is output outward from the other end of the conveying pipe. In the process of the condensate being output outward, it will pass through the filter net. The filter net made of activated carbon will adsorb and remove small particles of impurities in the condensate.

[0005] However, the device still has the following problems: the device does not provide a detailed description of the main body of the evaporator crystallizer, which can be understood as a traditional MVR evaporator crystallizer. The driven evaporator crystallizer mainly evaporates water and then separates the solid and liquid by the natural sinking of the solid. The solid-liquid separation efficiency is low, and it is difficult to effectively improve the evaporation and crystallization efficiency of the device. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the utility model provides an MVR evaporation crystallizer, which solves the above-mentioned problem that it is difficult to effectively improve the efficiency of the evaporation crystallization of the device.

[0008] (II) Technical solution

[0009] To achieve the above object, the utility model provides the following technical solution: an MVR evaporation crystallizer, comprising a crystallization tank, the bottom end of the crystallization tank is fixedly connected to a liquid storage tank, the bottom end of the liquid storage tank is fixedly connected to a support frame, and also comprises a crystallization component and a separation component arranged inside the crystallization tank, and an evaporation component is arranged on one side of the outside of the crystallization tank;

[0010] The crystallization assembly includes a fixed rod fixedly connected to the top of the crystallization tank, one end of the outer peripheral wall of the fixed rod is rotatably connected to a rotating sleeve, the other side of the outer peripheral wall of the crystallization tank is rotatably connected to a transmission rod 2, and one end of the transmission rod 2 extends into the crystallization tank, the outer peripheral wall of the crystallization tank is fixedly connected to a motor near the transmission rod 2, and the output shaft of the motor is fixedly connected to the other end of the transmission rod 2, one end of the transmission rod 2 is fixedly connected to a conical tooth 1, the top end of the rotating sleeve is fixedly connected to a conical tooth 2 meshing with the conical tooth 1, and a plurality of connecting rods are fixedly connected to the outer peripheral wall of the bottom end of the rotating sleeve, and one end of each of the connecting rods is fixedly connected to a scraper;

[0011] The separation component includes a connecting plate fixedly connected to the bottom end of the fixed rod, and a plurality of evenly distributed limiting sleeves are fixedly connected to the bottom of the connecting plate. The inner peripheral wall of each limiting sleeve is slidably connected to the limiting rod, and the bottom ends of the plurality of limiting rods are commonly fixedly connected to a frustum. A filter is fixedly connected to the bottom of the crystallization tank, and the inner wall of the filter is exactly separated from the outer wall of the scraper.

[0012] Preferably, the bottom of the connecting plate is fixedly connected to a piston cylinder near the limiting sleeve, the interior of the piston cylinder is slidably connected to a piston rod, and the bottom end of the piston rod is fixedly connected to the top end of the cone, a spring is provided between the piston rod and the piston cylinder, the bottom end of the liquid storage tank is fixedly connected to a discharge pipe adapted to the cone, and a control valve is provided at one end of the discharge pipe.

[0013] Preferably, a plurality of fixed plates are fixedly connected to the bottom of the liquid storage tank near the discharge pipe, one end of the plurality of fixed plates is commonly fixedly connected to a transmission rod 1, and the transmission rod 1 passes through and is rotatably connected to the discharge pipe, one end of the transmission rod 1 and one end of the transmission rod 2 are commonly sleeved with a belt to form a transmission connection, one end of the transmission rod 1 is fixedly connected to a cam, and the cam is coaxially arranged with the cone.

[0014] Preferably, the evaporation component includes an evaporator arranged on one side outside the crystallization tank, a liquid infusion tube is fixedly connected between the output end of the evaporator and the crystallization tank, a return liquid pipe is fixedly connected to the bottom of the liquid storage tank near the fixed plate, one end of the return liquid pipe is fixedly connected to a circulation pump, a connecting pipe 1 is fixedly connected between the output end of the circulation pump and the evaporator, and a connecting pipe 2 is fixedly connected between the return liquid pipe and the discharge pipe.

[0015] Preferably, a compression fan is provided on an external side of the evaporator, an air supply pipe is fixedly connected between the output end of the compression fan and the evaporator, and an air return pipe is fixedly connected between the input end of the compression fan and the crystallization tank.

[0016] Preferably, the top end of the connecting plate is arranged in a conical structure, and the surface of the connecting plate is smooth.

[0017] (III) Beneficial effects

[0018] 1. The MVR evaporation crystallizer drives the transmission rod 2 to rotate through the motor, and then drives the rotating sleeve, the connecting rod and the scraper to rotate through the cooperation between the transmission rod 2, the conical tooth 1 and the conical tooth 2, so that the scraper stirs the solution to accelerate the crystallization of the solution. At the same time, the scraper rotates to scrape off the crystal particles attached to the inner wall of the filter, effectively improving the efficiency of evaporation crystallization and solid-liquid separation of the device.

[0019] 2. The MVR evaporation crystallizer is cleverly designed and easy to operate. The cam is driven to cyclically contact the cone through the cooperation between the belt, the transmission rod 1 and the transmission rod 2. Then, the cone is made to reciprocate along the direction of the limit rod through the cooperation between the piston cylinder, the spring and the piston rod. The solution in the slurry at the top of the discharge pipe moves to the connecting pipe 2 through the cooperation between the connecting pipe 2 and the return pipe. Then, the solution circulates into the evaporator through the cooperation between the connecting pipe 2 and the liquid return pipe, thereby further improving the efficiency of the evaporation and crystallization of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from the first viewing angle;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model from a second viewing angle;

[0022] Figure 3 This is a schematic diagram of a half-cut three-dimensional structure of some components of the utility model;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of some separated components of the utility model.

[0024] In the figure: 1. crystallization tank; 2. liquid storage tank; 3. support frame; 4. discharge pipe; 5. control valve; 6. infusion pipe; 7. evaporator; 8. circulation pump; 9. connecting pipe 1; 10. compression fan; 11. air supply pipe; 12. air return pipe; 13. motor; 14. transmission rod 1; 15. transmission rod 2; 16. belt; 17. fixing plate; 18. fixing rod; 19. rotating sleeve; 20. conical gear 1; 21. conical gear 2; 22. connecting rod; 23. scraper; 24. filter; 25. liquid return pipe; 26. connecting pipe 2; 27. connecting plate; 28. limiting sleeve; 29. ​​limiting rod; 30. cone; 31. piston cylinder; 32. spring; 33. piston rod; 34. cam. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example: Figure 1 As shown, an MVR evaporation crystallizer comprises a crystallization tank 1, the bottom end of the crystallization tank 1 is fixedly connected with a liquid storage tank 2, wherein the crystallization tank 1 and the liquid storage tank 2 are fixed by welding to improve the sealing and stability of the device, a support frame 3 is welded to the bottom end of the liquid storage tank 2, one side of the outer peripheral wall of the crystallization tank 1 is fixedly connected with a feed pipe, and also comprises a crystallization component and a separation component arranged inside the crystallization tank 1, and an evaporation component is arranged on the outer side of the crystallization tank 1.

[0027] like Figure 2 and Figure 3 As shown, in a certain embodiment, in order to improve the crystallization efficiency of the device, the crystallization assembly includes a fixed rod 18 fixedly connected to the top of the crystallization tank 1, one end of the outer peripheral wall of the fixed rod 18 is rotatably connected to a rotating sleeve 19 through a bearing, the other side of the outer peripheral wall of the crystallization tank 1 is rotatably connected to a transmission rod 15 through a bearing, and one end of the transmission rod 15 extends to the inside of the crystallization tank 1, the outer peripheral wall of the crystallization tank 1 is fixedly connected to a motor 13 near the transmission rod 15 by bolts, and the output shaft of the motor 13 is fixedly connected to the other end of the transmission rod 15 by a coupling, and one end of the transmission rod 15 is fixedly connected to a conical gear 2 0, through the mutual cooperation between the motor 13 and the transmission rod 2 15, the conical tooth 1 20 is driven to rotate, the top of the rotating sleeve 19 is fixedly connected with a conical tooth 21 meshing with the conical tooth 1 20, and the rotating sleeve 19 is driven to rotate through the mutual cooperation between the conical tooth 1 20 and the conical tooth 21. The bottom outer peripheral wall of the rotating sleeve 19 is fixedly connected with a plurality of connecting rods 22, and one end of each of the connecting rods 22 is fixedly connected with a scraper 23. Through the mutual cooperation between the rotating sleeve 19 and the connecting rods 22, the scraper 23 is driven to rotate, thereby achieving the effect of stirring the solution inside the crystallization tank 1 and improving the efficiency of evaporation and crystallization.

[0028] like Figure 3 and Figure 4As shown, in a certain embodiment, in order to improve the efficiency of solid-liquid separation of the device, the separation component includes a connecting plate 27 fixedly connected to the bottom end of the fixed rod 18, and the bottom of the connecting plate 27 is fixedly connected with a plurality of evenly distributed limiting sleeves 28, wherein the connecting plate 27 plays the role of fixing the limiting sleeve 28, and the inner peripheral wall of each limiting sleeve 28 is slidably connected with a limiting rod 29, and the bottom ends of the plurality of limiting rods 29 are commonly fixedly connected with a frustum 30, and the limiting sleeve 28 and the limiting rod 29 cooperate with each other, so that the frustum 30 reciprocates up and down along the direction of the limiting rod 29, and the bottom of the crystallization tank 1 is fixedly connected with a filter 24, wherein the filter 24 plays the role of separating solid and liquid, and the inner wall of the filter 24 is just separated from the outer wall of the scraper 23, and the crystal particles attached to the inner wall of the filter 24 are scraped off by the rotation of the scraper 23, so as to avoid the crystal particles clogging the mesh of the filter 24, thereby improving the efficiency of solid-liquid separation of the device.

[0029] like Figure 2-Figure 4 As shown, in a certain embodiment, in order to further improve the efficiency of evaporation and crystallization of the device, a piston cylinder 31 is fixedly connected to the bottom of the connecting plate 27 near the limiting sleeve 28, and a piston rod 33 is slidably connected to the inside of the piston cylinder 31, and the bottom end of the piston rod 33 is fixedly connected to the top of the cone 30, and a spring 32 is arranged between the piston rod 33 and the piston cylinder 31. The mutual cooperation between the piston cylinder 31, the spring 32 and the piston rod 33 facilitates the resetting of the cone 30. The bottom end of the liquid storage tank 2 is fixedly connected to a discharge pipe 4 adapted to the cone 30, wherein the discharge pipe 4 serves to facilitate the transportation of the slurry to the subsequent process flow, and one end of the discharge pipe 4 is provided with a control Valve 5, a plurality of fixed plates 17 are fixedly connected to the bottom of the liquid storage tank 2 near the discharge pipe 4, one end of the plurality of fixed plates 17 is commonly fixedly connected to a transmission rod 14, and the transmission rod 14 passes through and is rotatably connected to the discharge pipe 4, one end of the transmission rod 14 and one end of the transmission rod 2 15 are jointly sleeved with a belt 16 to form a transmission connection, through the setting of the belt 16, the motor 13 drives the transmission rod 14 and the transmission rod 2 15 to rotate synchronously, one end of the transmission rod 14 is fixedly connected to a cam 34, wherein the transmission rod 14 plays a role in driving the cam 34 to rotate, and the cam 34 is coaxially arranged with the cone 30, wherein the cam 34 plays a role in cyclically resisting the cone 30.

[0030] like Figure 1 and Figure 2As shown, in a certain embodiment, in order to reduce the consumption of steam by the device, the evaporation component includes an evaporator 7 arranged on one side of the outside of the crystallizer 1, wherein the evaporator 7 plays a role in increasing temperature and pressure, and a liquid infusion pipe 6 is fixedly connected between the output end of the evaporator 7 and the crystallizer 1, and a liquid return pipe 25 is fixedly connected to the bottom of the liquid storage tank 2 near the fixed plate 17, and one end of the liquid return pipe 25 is fixedly connected to a circulation pump 8, and a connecting pipe 9 is fixedly connected between the output end of the circulation pump 8 and the evaporator 7, and the high temperature and high pressure are achieved through the mutual cooperation between the circulation pump 8, the liquid infusion pipe 6 and the connecting pipe 9. The pressurized solution is transported from the evaporator 7 to the crystallizer 1, a connecting pipe 26 is fixedly connected between the liquid return pipe 25 and the discharge pipe 4, a compression fan 10 is arranged on the outer side of the evaporator 7, wherein the compression fan 10 plays a role in pressurizing the steam to increase the temperature of the steam, an air supply pipe 11 is fixedly connected between the output end of the compression fan 10 and the evaporator 7, and an air return pipe 12 is fixedly connected between the input end of the compression fan 10 and the crystallizer 1, and the air supply pipe 11, the air return pipe 12 and the compression fan 10 cooperate with each other to improve the recycling rate of the steam and reduce the consumption of the steam.

[0031] like Figure 3 and Figure 4 As shown, in a certain embodiment, the top of the connecting plate 27 is configured in a conical structure, and the surface of the connecting plate 27 is smooth, so as to prevent the crystal particles precipitated after the pressure reduction from adhering to the surface of the connecting plate 27, thereby improving the crystallization efficiency of the device.

[0032] Working principle: When working, first start the compression fan 10, and allow the high-temperature steam to enter the evaporator 7 through the air supply pipe 11, then start the circulation pump 8, and allow the solution to enter the evaporator 7 through the connecting pipe 19. Through the cooperation between the circulation pump 8, the evaporator 7 and the infusion pipe 6, the high-temperature and high-pressure solution enters the crystallization tank 1. The crystallization tank 1 is in a normal pressure state, so that the solution is in an oversaturated state, thereby precipitating crystal particles. Then start the motor 13, and through the cooperation between the motor 13 and the belt 16, drive the transmission rod 14 and the transmission rod 2 15 to rotate synchronously, and then through the cooperation between the transmission rod 2 15 and the conical tooth 1 20 and the conical tooth 2 21, drive the rotating sleeve 19 to rotate, thereby driving the connecting rod 22 and the scraper 23 to rotate, so as to achieve the stirring effect of the solution in the crystallization tank 1, improve the efficiency of the solution crystallization, and at the same time, the scraper 23 scrapes the filter 24 The crystal particles attached to the wall surface improve the efficiency of the evaporation and crystallization of the device. At the same time, the cam 34 is driven by the transmission rod 14 to rotate and contact the cone 30. Then, through the cooperation between the piston cylinder 31, the spring 32 and the piston rod 33, the cone 30 reciprocates up and down along the direction of the limit rod 29, so that the cone 30 circulates and detaches from and enters the discharge pipe 4, so that the crystal slurry on the inner wall of the filter 24 intermittently flows into the top of the discharge pipe 4. Through the cooperation between the cone 30, the discharge pipe 4 and the control valve 5, the solution in the crystal slurry is squeezed to the connecting pipe 26, and then through the cooperation between the connecting pipe 26 and the return pipe 25, the solution circulates into the evaporator 7, realizing the effect of cyclic evaporation and crystallization, further improving the efficiency of the evaporation and crystallization of the device, and then through the setting of the return pipe 12, the steam is returned to the compression fan 10, realizing the recycling of steam and reducing the consumption of steam.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An MVR evaporation crystallizer, comprising a crystallization tank (1), the bottom end of the crystallization tank (1) is fixedly connected to a liquid storage tank (2), the bottom end of the liquid storage tank (2) is fixedly connected to a support frame (3), characterized in that: It also comprises a crystallization component and a separation component arranged inside the crystallization tank (1), and an evaporation component is arranged on one side outside the crystallization tank (1); The crystallization assembly comprises a fixed rod (18) fixedly connected to the top of the crystallization tank (1), one end of the outer peripheral wall of the fixed rod (18) is rotatably connected to a rotating sleeve (19), the other side of the outer peripheral wall of the crystallization tank (1) is rotatably connected to a second transmission rod (15), and one end of the second transmission rod (15) extends into the crystallization tank (1), the outer peripheral wall of the crystallization tank (1) is fixedly connected to a motor (13) near the second transmission rod (15), and the output shaft of the motor (13) is fixedly connected to the other end of the second transmission rod (15), one end of the second transmission rod (15) is fixedly connected to a conical tooth one (20), the top end of the rotating sleeve (19) is fixedly connected to a conical tooth two (21) meshing with the conical tooth one (20), and the bottom outer peripheral wall of the rotating sleeve (19) is fixedly connected to a plurality of connecting rods (22), and one end of each of the connecting rods (22) is fixedly connected to a scraper (23); The separation assembly comprises a connecting plate (27) fixedly connected to the bottom end of the fixing rod (18); a plurality of evenly distributed limiting sleeves (28) are fixedly connected to the bottom of the connecting plate (27); the inner peripheral wall of each limiting sleeve (28) is slidably connected to a limiting rod (29); the bottom ends of the plurality of limiting rods (29) are commonly fixedly connected to a frustum (30); the bottom of the crystallization tank (1) is fixedly connected to a filter (24), and the inner wall of the filter (24) is exactly separated from the outer wall of the scraper (23).

2. The MVR evaporation crystallizer according to claim 1, characterized in that: A piston cylinder (31) is fixedly connected to the bottom of the connecting plate (27) near the limiting sleeve (28), a piston rod (33) is slidably connected to the inside of the piston cylinder (31), and the bottom end of the piston rod (33) is fixedly connected to the top end of the cone (30), a spring (32) is arranged between the piston rod (33) and the piston cylinder (31), and the bottom end of the liquid storage tank (2) is fixedly connected to a discharge pipe (4) adapted to the cone (30), and a control valve (5) is arranged at one end of the discharge pipe (4).

3. The MVR evaporation crystallizer according to claim 2, characterized in that: A plurality of fixed plates (17) are fixedly connected to the bottom of the liquid storage tank (2) near the discharge pipe (4), one end of the plurality of fixed plates (17) is commonly fixedly connected to a transmission rod (14), and the transmission rod (14) passes through and is rotatably connected to the discharge pipe (4), one end of the transmission rod (14) and one end of the transmission rod (15) are commonly sleeved with a belt (16) to form a transmission connection, one end of the transmission rod (14) is fixedly connected to a cam (34), and the cam (34) is coaxially arranged with the cone (30).

4. The MVR evaporation crystallizer according to claim 1, characterized in that: The evaporation assembly comprises an evaporator (7) arranged on one side of the outside of the crystallization tank (1); a liquid infusion pipe (6) is fixedly connected between the output end of the evaporator (7) and the crystallization tank (1); a liquid return pipe (25) is fixedly connected to the bottom of the liquid storage tank (2) near the fixed plate (17); one end of the liquid return pipe (25) is fixedly connected to a circulation pump (8); a connecting pipe 1 (9) is fixedly connected between the output end of the circulation pump (8) and the evaporator (7); and a connecting pipe 2 (26) is fixedly connected between the liquid return pipe (25) and the discharge pipe (4).

5. The MVR evaporation crystallizer according to claim 4, characterized in that: A compression fan (10) is provided on one side of the outside of the evaporator (7); an air supply pipe (11) is fixedly connected between the output end of the compression fan (10) and the evaporator (7); and an air return pipe (12) is fixedly connected between the input end of the compression fan (10) and the crystallization tank (1).

6. The MVR evaporation crystallizer according to claim 1, characterized in that: The top end of the connecting plate (27) is arranged in a conical structure, and the surface of the connecting plate (27) is smooth.

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