An MVR evaporator crystallizer

Abstract

This utility model discloses an MVR evaporator crystallizer, including a support, a filtration mechanism, and a preheating mechanism. The support has the evaporator crystallization mechanism at its front end and a centrifugal pump at its lower end. The filtration mechanism includes a filter box, a spiral blade shaft, a filter cylinder, and a collection box. The filter box is located at the rear of the lower end of the support, and the collection box is located at the right end of the filter box. An inclined filter cylinder is fixedly connected to the upper left side wall of the filter box. The right end of the filter cylinder is open and connected to the collection box. A connection port is located at the upper left end of the filter cylinder. A spiral blade shaft is rotatably connected inside the filter cylinder, and the bolts on the spiral blade shaft contact the inner wall of the filter cylinder. The inlet of the centrifugal pump is connected to the lower end of the filter box via a connecting pipe. This MVR evaporator crystallizer reduces maintenance frequency through pretreatment filtration and reduces steam consumption through preheating.

Description

Technical Field

[0001] This utility model relates to the field of MVR evaporator crystallizer technology, specifically an MVR evaporator crystallizer. Background Technology

[0002] Nano-aluminum fluoride is a novel nanomaterial with high specific surface area, excellent thermal stability, and chemical inertness. Its nanoscale size endows it with enhanced catalytic activity, optical properties, and mechanical strength, making it suitable for various high-end fields. The current project uses aluminum electrolyte as raw material, adding aluminum sulfate or aluminum chloride to dissolve the electrolyte, then adding sulfuric acid or hydrochloric acid to adjust the reaction pH. The main product, nano-aluminum fluoride, is generated through a co-precipitation reaction. Sodium carbonate is added to the liquid portion to produce lithium carbonate as a byproduct, and the remaining liquid is evaporated using MVR to produce sodium sulfate or sodium chloride as byproducts. Current research focuses on low-cost, large-scale preparation technology and environmental safety assessment, with the potential for breakthroughs in new energy and advanced manufacturing fields in the future.

[0003] MVR evaporation uses a centrifugal fan to pressurize and heat steam. The heated steam returns to the evaporator and exchanges heat with the liquid in the internal tube bundle, concentrating the liquid. The concentrated liquid is then centrifuged for crystallization. However, because the internal tube bundle of the evaporator is thin and the liquid contains impurities, the tube bundle can become clogged. At the same time, due to the large temperature difference between the liquid and steam, excessive steam consumption occurs, resulting in a low liquid concentration rate. Therefore, we propose an MVR evaporator crystallizer. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide an MVR evaporator crystallizer that reduces maintenance frequency through pretreatment filtration and reduces steam consumption through preheating, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an MVR evaporator crystallizer, comprising a support, a filtration mechanism, and a preheating mechanism;

[0006] Support: An evaporation and crystallization mechanism is installed at its front end, and a centrifugal pump is installed at its lower end;

[0007] Filtration mechanism: It includes a filter box, a spiral blade shaft, a filter cylinder and a collection box. The filter box is located at the lower rear side of the support. The collection box is located at the right end of the filter box. An inclined filter cylinder is fixedly connected to the upper left side wall inside the filter box. The right end of the filter cylinder is an open structure and is connected to the collection box. A connection port is located at the upper left end of the filter cylinder. The spiral blade shaft is rotatably connected inside the filter cylinder. The bolt blades of the spiral blade shaft are in contact with the inner wall of the filter cylinder. The inlet of the centrifugal pump is connected to the lower end of the filter box through a connecting pipe.

[0008] Preheating mechanism: It is located between the evaporation and crystallization mechanism and the centrifugal pump. It reduces maintenance frequency through pretreatment filtration and reduces steam consumption through preheating.

[0009] Furthermore, it also includes a controller, which is installed on the upper bottom wall of the support. The input end of the controller is electrically connected to an external power source, and the input end of the centrifugal pump is electrically connected to the output end of the controller, which is a control electrical appliance.

[0010] Furthermore, the filtration mechanism also includes filter screens, with two vertically distributed filter screens snapped into the lower end of the filter box for multiple filtrations.

[0011] Furthermore, the filtration mechanism also includes a universal coupling and a motor. The upper end of the collection box is fixedly connected to the motor, and the output shaft of the motor is fixedly connected to the right end of the spiral blade shaft. The input end of the motor is electrically connected to the output end of the controller, driving the spiral blade shaft to rotate.

[0012] Furthermore, the preheating mechanism includes a heating cylinder, heating rods, and an end cap. The heating cylinder is fixedly connected to the upper bottom wall of the support. The outlet of the centrifugal pump is connected to the lower end of the heating cylinder through a connecting pipe. The upper end of the heating cylinder is fixedly connected to the end cap. The bottom wall of the end cap is fixedly connected to evenly distributed heating rods. The input ends of the heating rods are electrically connected to the output end of the controller for preheating.

[0013] Furthermore, the evaporation crystallization mechanism includes a concentration tower, a tube bundle, an evaporator, a connecting pipe, and a separation tower. The front end of the support is equipped with a concentration tower and a separation tower. The upper end of the concentration tower is equipped with an evaporator. The evaporator is fixedly connected with a uniformly distributed tube bundle. The upper end of the heating cylinder is connected to the upper end of the evaporator through a connecting pipe, and the lower end of the evaporator is connected to the lower end of the concentration tower through two connecting pipes, thereby realizing evaporation crystallization.

[0014] Furthermore, the evaporation crystallization mechanism also includes a centrifugal fan and a connecting pipe four. A centrifugal fan is installed at the lower middle of the support. The upper end of the separation tower is connected to the air inlet of the centrifugal fan through the connecting pipe four. The air outlet of the centrifugal fan is connected to the upper end of the outer arc surface of the evaporator through a steam pipe. The input end of the centrifugal fan is electrically connected to the output end of the controller to pressurize and heat the steam.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This MVR evaporator crystallizer has the following advantages:

[0016] 1. During the processing of nano-aluminum fluoride, the liquid portion is sent into the filter box and filtered multiple times through the filter cylinder and filter screen to avoid subsequent clogging of the tube bundle. Impurities are scraped into the inside of the collection box by the spiral blade shaft. The impurities collected in the collection box are diluted and can be sent back into the filter box for filtration to avoid waste.

[0017] 2. The centrifugal pump sends the filtered liquid into the heating cylinder, where the heating rod preheats the liquid, raising its temperature, reducing subsequent steam consumption, and increasing the concentration of the liquid. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a cross-sectional structural diagram of the filtration mechanism of this utility model.

[0021] In the diagram: 1. Support frame; 2. Filter mechanism; 21. Filter box; 22. Spiral blade shaft; 23. Filter screen; 24. Filter cylinder; 25. Collection box; 26. Universal coupling; 27. Motor; 3. Centrifugal pump; 4. Connecting pipe one; 5. Preheating mechanism; 51. Heating cylinder; 52. Heating rod; 53. End cap; 6. Connecting pipe two; 7. Evaporation and crystallization mechanism; 71. Concentration tower; 72. Tube bundle; 73. Evaporator; 74. Connecting pipe three; 75. Centrifugal fan; 76. Separation tower; 77. Connecting pipe four; 8. Controller. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-3 This embodiment provides a technical solution: an MVR evaporator crystallizer, including a support 1, a filtration mechanism 2, and a preheating mechanism 5;

[0024] Support 1: An evaporation and crystallization mechanism 7 is installed at its front end, and a centrifugal pump 3 is installed at its lower end. The evaporation and crystallization mechanism 7 includes a concentration tower 71, a tube bundle 72, an evaporator 73, a connecting pipe 3 74, and a separation tower 76. The front end of support 1 includes the concentration tower 71 and the separation tower 76. The upper end of the concentration tower 71 is equipped with the evaporator 73, and the evaporator 73 has uniformly distributed tube bundles fixedly connected inside. The upper end of the heating cylinder 51 is connected to the upper end of the evaporator 73 via a connecting pipe 2 6, and the lower end of the evaporator 73 is connected to the lower end of the concentration tower 71 via two connecting pipes 3 74. The evaporation and crystallization mechanism 7 also includes a centrifugal fan 75 and a connecting pipe 4 77. The centrifugal fan 75 is installed in the middle of the lower end of support 1, and the upper end of the separation tower 76 is connected to the air inlet of the centrifugal fan 75 via a connecting pipe 4 77. The air outlet of the centrifugal fan 75... The outlet is connected to the upper end of the outer arc surface of the evaporator 73 via a steam pipe. The input end of the centrifugal fan 75 is electrically connected to the output end of the controller 8. Liquid flows into the evaporator 73 and falls as a film after passing through each tube bundle 72. Hot steam exchanges heat with the liquid inside the tube bundle 72 inside the evaporator 73. Part of the liquid inside the tube bundle 72 evaporates, and the concentrated liquid gathers at the lower end of the concentration tower 71 and is sent away. The steam enters the separation tower 76 for cooling and separation, and is then drawn into the centrifugal fan 75 through the connecting pipe 77. After being pressurized by the centrifugal fan 75, it returns to the interior of the evaporator 73 through the steam pipe. After being pressurized, the steam pressure increases and the temperature rises accordingly. Part of the steam condenses after the heat exchange is completed. The lower end of the outer arc surface of the evaporator 73 is provided with a steam outlet and a condensate outlet. Excess steam is discharged through the steam outlet, and condensate is discharged through the condensate outlet.

[0025] Filter mechanism 2 includes a filter box 21, a spiral blade shaft 22, a filter cylinder 24, and a collection box 25. The filter box 21 is located at the lower rear side of the support 1, and the collection box 25 is located at the right end of the filter box 21. The filter cylinder 24 is fixedly connected to the upper left side wall inside the filter box 21 at an incline. The right end of the filter cylinder 24 is open and connected to the collection box 25. A connection port is located at the upper left side of the filter cylinder 24 (the connection port extends through the upper end of the filter box 21). The spiral blade shaft 22 is rotatably connected inside the filter cylinder 24. The bolt blades of the spiral blade shaft 22 contact the inner wall of the filter cylinder 24. The inlet of the centrifugal pump 3 is connected to the lower end of the filter box 21 through a connecting pipe. Filter mechanism 2 also includes a filter screen 23. Two filters are snapped into the lower end of the filter box 21. The filter mechanism 2 includes a universal coupling 26 and a motor 27, with the filter screens 23 distributed vertically. The upper end of the collection box 25 is fixedly connected to the motor 27. The output shaft of the motor 27 is fixedly connected to the right end of the spiral blade shaft 22 via the universal coupling 26. The input end of the motor 27 is electrically connected to the output end of the controller 8. The liquid is fed into the interior of the filter cylinder 24 through the connection port. The output shaft of the motor 27 drives the spiral blade shaft 22 to rotate through the universal coupling 26. The liquid is initially filtered through the filter holes at the lower end of the filter cylinder 24. The left end of the filter cylinder 24 is tilted downward to prevent the liquid from flowing into the collection box 25. The rotation of the spiral blade shaft 22 scrapes impurities from the inner wall of the filter cylinder 24 into the interior of the collection box 25. The two layers of filter screens 23 filter the liquid again.

[0026] Preheating mechanism 5: It is located between the evaporation and crystallization mechanism 7 and the centrifugal pump 3. The preheating mechanism 5 includes a heating cylinder 51, heating rods 52 and end caps 53. The heating cylinder 51 is fixedly connected to the upper bottom wall of the support 1. The outlet of the centrifugal pump 3 is connected to the lower end of the heating cylinder 51 through a connecting pipe 4. The upper end of the heating cylinder 51 is fixedly connected to the end cap 53. The bottom wall of the end cap 53 is fixedly connected to evenly distributed heating rods 52. The input end of the heating rods 52 is electrically connected to the output end of the controller 8. The filtered liquid is sent into the interior of the heating cylinder 51 through the centrifugal pump 3. The heating rods 52 preheat the liquid, and then the liquid flows into the interior of the evaporator 73.

[0027] It also includes a controller 8, which is located on the upper bottom wall of the support 1. The input end of the controller 8 is electrically connected to an external power source, and the input end of the centrifugal pump 3 is electrically connected to the output end of the controller 8.

[0028] The working principle of the MVR evaporator crystallizer provided by this utility model is as follows: Liquid is fed into the filter cylinder 24 through the connection port. The output shaft of the motor 27 drives the spiral blade shaft 22 to rotate via the universal coupling 26. The liquid is initially filtered through the filter holes at the lower end of the filter cylinder 24. The left end of the filter cylinder 24 is tilted downwards to prevent liquid from flowing into the collection tank 25. The spiral blade shaft 22 rotates, and the impurities are scraped from left to right from the inner wall of the filter cylinder 24 to the inside of the collection tank 25 by the squeezing of the blades against the inner wall of the filter cylinder 24. Two layers of filter screens 23 filter the liquid again. The filtered liquid is then sent into the heating cylinder 51 by the centrifugal pump 3. The heating rod 52 heats the liquid. Preheating is performed, followed by the liquid flowing into the evaporator 73. After passing through each tube bundle 72, the liquid falls as a film. Hot steam exchanges heat with the liquid inside the tube bundle 72 inside the evaporator 73. Part of the liquid inside the tube bundle 72 evaporates, and the concentrated liquid gathers at the lower end of the concentration tower 71 and is sent away. The steam enters the separation tower 76 for cooling and separation, and is then drawn into the centrifugal fan 75 through the connecting pipe 77. After being pressurized by the centrifugal fan 75, the steam returns to the interior of the evaporator 73 through the steam pipe. After being pressurized, the steam pressure increases and the temperature rises accordingly. Part of the steam condenses after the heat exchange is completed. The lower end of the outer arc surface of the evaporator 73 is provided with a steam port and a condensate port. Excess steam is discharged through the steam port, and condensate is discharged through the condensate port.

[0029] It is worth noting that the controller 8 disclosed in the above embodiments can be a PIC12F675-I / SN, the motor 27 can be a YZR series motor, the centrifugal pump 3 can be an IH centrifugal pump, and the centrifugal fan 75 can be a Y5-47-8D centrifugal fan. The controller 8 controls the operation of the motor 27, centrifugal pump 3, centrifugal fan 75 and heating rod 52 using methods commonly used in the prior art.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An MVR evaporator crystallizer, characterized in that: It includes a support (1), a filtration mechanism (2), and a preheating mechanism (5); Support (1): An evaporation crystallization mechanism (7) is provided at its front end, and a centrifugal pump (3) is provided at the lower end of the support (1); Filtering mechanism (2): It includes a filter box (21), a spiral blade shaft (22), a filter cylinder (24) and a collection box (25). The filter box (21) is provided on the rear side of the lower end of the bracket (1). The collection box (25) is provided on the right end of the filter box (21). The filter cylinder (24) is fixedly connected to the left side wall of the upper end of the filter box (21) at an incline. The right end of the filter cylinder (24) is an open structure and is connected to the collection box (25). The upper left end of the filter cylinder (24) is provided with a connection port. The spiral blade shaft (22) is rotatably connected inside the filter cylinder (24). The bolt blades of the spiral blade shaft (22) are in contact with the inner wall of the filter cylinder (24). The inlet of the centrifugal pump (3) is connected to the lower end of the filter box (21) through a connecting pipe. Preheating mechanism (5): It is located between the evaporation and crystallization mechanism (7) and the centrifugal pump (3).

2. The MVR evaporator crystallizer according to claim 1, characterized in that: It also includes a controller (8), which is located on the upper bottom wall of the support (1). The input end of the controller (8) is electrically connected to an external power source, and the input end of the centrifugal pump (3) is electrically connected to the output end of the controller (8).

3. The MVR evaporator crystallizer according to claim 1, characterized in that: The filtration mechanism (2) also includes a filter screen (23), and two vertically distributed filter screens (23) are snapped into the lower end of the filter box (21).

4. An MVR evaporator crystallizer according to claim 2, characterized in that: The filtration mechanism (2) also includes a universal coupling (26) and a motor (27). The upper end of the collection box (25) is fixedly connected to the motor (27). The output shaft of the motor (27) is fixedly connected to the right end of the spiral blade shaft (22). The input end of the motor (27) is electrically connected to the output end of the controller (8).

5. An MVR evaporator crystallizer according to claim 2, characterized in that: The preheating mechanism (5) includes a heating cylinder (51), heating rods (52) and an end cap (53). The heating cylinder (51) is fixedly connected to the bottom wall of the upper layer of the support (1). The outlet of the centrifugal pump (3) is connected to the lower end of the heating cylinder (51) through a connecting pipe (4). The end cap (53) is fixedly connected to the upper end of the heating cylinder (51). The bottom wall of the end cap (53) is fixedly connected to evenly distributed heating rods (52). The input ends of the heating rods (52) are electrically connected to the output ends of the controller (8).

6. An MVR evaporator crystallizer according to claim 5, characterized in that: The evaporation and crystallization mechanism (7) includes a concentration tower (71), a tube bundle (72), an evaporator (73), a connecting pipe three (74), and a separation tower (76). The front end of the support (1) is provided with a concentration tower (71) and a separation tower (76). The upper end of the concentration tower (71) is provided with an evaporator (73). The evaporator (73) is fixedly connected with a uniformly distributed tube bundle (72). The upper end of the heating cylinder (51) is connected to the upper end of the evaporator (73) through a connecting pipe two (6). The lower end of the evaporator (73) is connected to the lower end of the concentration tower (71) through two connecting pipes three (74).

7. An MVR evaporator crystallizer according to claim 6, characterized in that: The evaporation and crystallization mechanism (7) also includes a centrifugal fan (75) and a connecting pipe (77). The centrifugal fan (75) is installed at the middle of the lower end of the support (1). The upper end of the separation tower (76) is connected to the air inlet of the centrifugal fan (75) through the connecting pipe (77). The air outlet of the centrifugal fan (75) is connected to the upper end of the outer arc surface of the evaporator (73) through a steam pipe. The input end of the centrifugal fan (75) is electrically connected to the output end of the controller (8).

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