Evaporative crystallization device for extracting high-purity ammonium rhenate and use method

Abstract

The invention relates to the technical field of crystallization and extraction of high-purity ammonium rhenate, in particular to an evaporative crystallization device for extracting high-purity ammonium rhenate and a use method.The evaporative crystallization device comprises an evaporator tank body, a material receiving base is fixedly connected to the interior of the evaporator tank body, and a baffle is rotatably connected to the interior of the evaporator tank body; the baffle is fixedly connected with the crystal fishing net plate, the baffle is fixedly connected with the knocking discharging mechanism, crystals in a solution can be fished and separated through the crystal fishing net plate, the crystals can be rapidly and continuously extracted under the condition that the evaporative crystallization process is not stopped, the production efficiency is improved, and the production cost is reduced. According to the method, the downtime required for taking out the crystals each time is shortened, the re-dissolution phenomenon possibly occurring in mother liquor can be reduced by regularly fishing the formed crystals, so that the purity of a final product is improved, the crystals can be timely fished to prevent overgrowth, the crystals are kept in a uniform and consistent form, and subsequent treatment and purification are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of high-purity ammonium rhenate crystallization extraction, and in particular to an evaporation crystallization device for extracting high-purity ammonium rhenate and a use method thereof. Background Art

[0002] Evaporative crystallization of high-purity ammonium rhenate is a method for separating and purifying ammonium rhenate, one of the main compounds of rhenium, which is widely used in catalysis, materials science and nuclear industry. High-purity ammonium rhenate usually needs to go through an evaporation and crystallization process to remove impurities and obtain the required crystal quality. First, a rhenium compound (such as rhenic acid) is dissolved in deionized water to form an ammonium rhenate solution. This solution needs to have a sufficient concentration to form crystals in the subsequent evaporation process. The ammonium rhenate solution is heated to evaporate some of the water and concentrate the solution. The heating should be controlled at a suitable temperature to avoid decomposition or other side reactions of the ammonium rhenate. Through evaporation, the concentrated solution will reach a saturated state, creating conditions for crystallization.

[0003] When using an evaporator to evaporate and concentrate a solution, the existing evaporator needs to be shut down each time a crystal is taken out during use, which results in a longer production cycle and a decrease in overall output. Frequent shutdowns and restarts prevent the device from maintaining continuous operation, reducing production capacity.

[0004] In summary, the prior art lacks a technology for continuously salvaging and separating crystals for an evaporation crystallization extraction device for high-purity ammonium rhenate, and removing the crystals without stopping the device. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the background technology and to propose an evaporation crystallization device for extracting high-purity ammonium rhenate and a method for using the same.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: an evaporation crystallization device for extracting high-purity ammonium rhenate, including an evaporator tank body, a material receiving seat is fixedly provided in the evaporator tank body, a baffle is rotatably provided in the evaporator tank body, a crystal scooping mesh plate is fixedly provided on the baffle, a knocking and unloading mechanism is fixedly provided on the baffle, a material conveying pipe is fixedly provided in the material receiving seat, and a discharge seat is fixedly provided on the outer side of one end of the evaporator tank body.

[0007] Preferably, two support legs are connected and fixedly provided on the evaporator tank body, a feed pipe is connected and fixedly provided through one side of the evaporator tank body, a steam exhaust pipe is connected and fixedly provided through the top of the evaporator tank body, and an arc-shaped rack is connected and fixedly provided on the inner wall of one side of the evaporator tank body.

[0008] Preferably, a material receiving groove is provided on the material receiving seat, a rotating shaft is rotatably connected to the inner wall of one end of the material receiving seat, a driving wheel is fixedly connected to the inner end of the rotating shaft, and a driven wheel is fixedly connected to the outer end of the rotating shaft.

[0009] Preferably, the baffle is located on one side of the driven wheel and is fixedly connected to an annular rack A, and the annular rack A is meshed and transmission-engaged with the driven wheel.

[0010] Preferably, the knocking and unloading mechanism includes a fixed frame, which is connected and fixed to the baffle, and a transmission rod is rotatably connected to the fixed frame. One end of the transmission rod passes through the baffle and is connected and fixed to a transmission wheel. The transmission wheel is meshed with an arc-shaped rack for transmission, and a plurality of levers are connected and fixed to the outside of the transmission rod in a spiral structure.

[0011] Preferably, a plurality of sleeves are connected and fixedly arranged in a linear structure on the fixed frame, a knocking rod is slidably arranged inside the sleeve, the outer end of the knocking rod is movably contacted with the crystal scooping mesh plate, one end of the knocking rod located in the sleeve is connected and fixedly arranged with a spring, the other end of the spring is connected and fixedly arranged with the inner wall of the sleeve, the other end of the knocking rod is connected and fixedly arranged with a contact rod, one end of the contact rod is slidably arranged inside the sleeve, and the outer end of the contact rod is movably contacted with the shifting rod.

[0012] Preferably, a feed trough is provided on the feed pipe, one end of the feed trough is connected and fixedly arranged through the evaporator tank body, a material guide trough is connected and fixedly arranged through the outer end of the feed pipe, a spiral push rod is rotatably arranged through the feed pipe, one end of the spiral push rod extends to the outside of the evaporator tank body and is connected and fixedly arranged with a motor, the motor is connected and fixedly arranged with the evaporator tank body, a rotating ring is connected and fixedly arranged on the spiral push rod, a ring rack B is connected and fixedly arranged on the rotating ring, the ring rack B is meshed with the driving wheel for transmission, the other end of the spiral push rod extends to the outside of the feed pipe and is connected and fixedly arranged with a universal joint, and the other end of the universal joint is connected and fixedly arranged with a sector gear.

[0013] Preferably, the feed port of the discharge seat is fixedly connected to the material guide trough, a discharge port is opened at the bottom of the other side of the discharge seat, a push impeller is rotatably connected inside the discharge seat, one end of the push impeller passes through the inner wall of the discharge seat and extends to the outside and is fixedly connected to an adjusting wheel, and the adjusting wheel is movably meshed with the fan gear for transmission.

[0014] A method for using an evaporation crystallization device for extracting high-purity ammonium rhenate comprises the following steps:

[0015] S1. When performing evaporation and crystallization extraction of high-purity ammonium rhenate, firstly, the high-purity ammonium rhenate solution is injected into the evaporator tank body, and the liquid level of the solution is lower than the opening of the receiving seat. At this time, the evaporator tank body is used to heat the solution to evaporate the water inside it and form crystals;

[0016] S2. After crystallization occurs, the rotating baffle drives the crystal scooping screen to rotate, and the crystals in the solution are separated from the solution;

[0017] S3, when the crystal scooping mesh plate rotates to the upper side, the crystal scooping mesh plate vibrates under the action of knocking the material discharge mechanism, so that the crystal can fall into the material delivery pipe in the material receiving seat;

[0018] S4, then the crystals are transported to the discharging seat through the conveying pipe for intermittent discharging.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. When using the evaporator tank body to perform evaporation and crystallization extraction of high-purity ammonium rhenate, the baffle is used to drive the crystal scooping mesh plate to rotate, so that the crystal scooping mesh plate can salvage and separate the crystals in the solution, and collect them through a receiving seat with a receiving trough. It can extract crystals quickly and continuously without stopping the evaporation and crystallization process, which helps to improve production efficiency and reduce the downtime required for each crystal extraction. Regularly salvaging the formed crystals can reduce the possible re-dissolution phenomenon in the mother liquor, thereby improving the purity of the final product. Timely salvaging the crystals can prevent excessive growth and ensure that the crystals maintain a uniform and consistent shape, which is helpful for subsequent processing and purification;

[0021] 2. When the crystal scooping mesh plate is used for evaporation crystal extraction, the contact rod will continuously hit the crystal scooping mesh plate under the action of the arc-shaped rack, causing the crystal scooping mesh plate to vibrate, so that the salvaged crystals can fall into the receiving seat, making it easier to fall into the receiving seat, thereby improving the crystal scooping efficiency. Through continuous vibration, it can prevent crystals from accumulating on the mesh plate, ensuring the smoothness of each operation;

[0022] 3. By setting up a conveying pipe, the salvaged crystals can be transported continuously. At the same time, the intermittently rotating pushing impeller in the discharge seat can avoid conduction between the outside and the inside of the evaporator tank, avoid steam overflow from the evaporator tank, and effectively isolate the high temperature inside the evaporator tank, thereby ensuring the crystal extraction efficiency of the evaporator tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an evaporation crystallization device for extracting high-purity ammonium rhenate and a method of using the device;

[0024] Figure 2 The present invention is a schematic cross-sectional view of the overall structure of an evaporation crystallization device for extracting high-purity ammonium rhenate and a method of using the device;

[0025] Figure 3 It is a schematic cross-sectional view of the tank structure of an evaporator tank of an evaporation crystallization device for extracting high-purity ammonium rhenate and a method of using the present invention;

[0026] Figure 4 It is a schematic cross-sectional view of a material receiving seat structure of an evaporation crystallization device for extracting high-purity ammonium rhenate and a method of using the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of a baffle and a crystal scooping screen plate of an evaporation crystallization device for extracting high-purity ammonium rhenate and a method of using the present invention;

[0028] Figure 6 It is a schematic cross-sectional view of a knocking and unloading mechanism structure of an evaporation crystallization device for extracting high-purity ammonium rhenate and a method of using the present invention;

[0029] Figure 7 It is a schematic cross-sectional view of a feed pipe structure of an evaporation crystallization device for extracting high-purity ammonium rhenate and a method of using the device;

[0030] Figure 8 The present invention is a schematic diagram of a cross-sectional expansion of a discharge seat structure of an evaporation crystallization device for extracting high-purity ammonium rhenate and a method of using the device.

[0031] 1. Evaporator tank body; 2. Material receiving seat; 3. Baffle; 4. Crystal scooping mesh plate; 5. Knocking unloading mechanism; 6. Material conveying pipe; 7. Material discharging seat; 101. Support frame; 102. Material feeding pipe; 103. Steam discharge pipe; 104. Arc rack; 201. Material receiving trough; 202. Rotating shaft; 203. Driving wheel; 204. Driven wheel; 301. Ring rack A; 501. Fixed frame; 502. Transmission Rod; 503, transmission wheel; 504, lever; 505, sleeve; 506, knock rod; 507, spring; 508, contact rod; 601, feed trough; 602, guide trough; 603, spiral push rod; 604, motor; 605, rotating ring; 606, ring rack B; 607, universal joint; 608, sector gear; 701, discharge port; 702, push impeller; 703, adjusting wheel. DETAILED DESCRIPTION

[0032] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0033] like Figure 1-Figure 8The evaporation crystallization device and the use method for extracting high-purity ammonium rhenate shown in the figure include an evaporator tank body 1, a material receiving seat 2 is fixedly connected to the evaporator tank body 1, a baffle 3 is rotatably connected to the evaporator tank body 1, a crystal scooping mesh plate 4 is fixedly connected to the baffle 3, a knocking and unloading mechanism 5 is fixedly connected to the baffle 3, a material conveying pipe 6 is fixedly connected to the material receiving seat 2, and a discharge seat 7 is fixedly connected to the outer side of one end of the evaporator tank body 1.

[0034] like Figure 3 As shown, two support legs 101 are connected and fixedly provided on the evaporator tank body 1, a feed pipe 102 is connected and fixedly provided on one side of the evaporator tank body 1, a steam exhaust pipe 103 is connected and fixedly provided on the top of the evaporator tank body 1, and an arc-shaped rack 104 is connected and fixedly provided on the inner wall of one side of the evaporator tank body 1. The solution is injected into the evaporator tank body 1 through the feed pipe 102, and then the solution is heated by the evaporator tank body 1 to evaporate and concentrate, and the evaporated steam is discharged through the steam exhaust pipe 103.

[0035] like Figure 4 As shown, a material receiving groove 201 is provided on the material receiving seat 2, and a rotating shaft 202 is rotatably connected to the inner wall of one end of the material receiving seat 2, a driving wheel 203 is fixedly connected to the inner end of the rotating shaft 202, and a driven wheel 204 is fixedly connected to the outer end of the rotating shaft 202.

[0036] like Figure 5 As shown, the baffle 3 is connected and fixedly provided with an annular rack A301 on one side of the driven wheel 204, and the annular rack A301 is meshed and transmission-arranged with the driven wheel 204. The driving wheel 203 drives the rotating shaft 202 to rotate, so that the rotating shaft 202 drives the connected driven wheel 204 to rotate, so that the driven wheel 204 drives the baffle 3 connected to the annular rack A301 to rotate.

[0037] like Figure 6 As shown, the knocking unloading mechanism 5 includes a fixed frame 501, which is connected and fixedly arranged with the baffle plate 3, and a transmission rod 502 is rotatably connected and arranged on the fixed frame 501. One end of the transmission rod 502 passes through the baffle plate 3 and is connected and fixedly arranged with a transmission wheel 503. The transmission wheel 503 is meshed and arranged with the arc-shaped rack 104 for transmission. The transmission rod 502 is connected and fixedly arranged with a plurality of levers 504 in a spiral structure. Under the action of the arc-shaped rack 104, the transmission rod 502 connected with the transmission wheel 503 will rotate, so that the transmission rod 502 drives the plurality of levers 504 to rotate.

[0038] A plurality of sleeves 505 are connected and fixedly arranged in a linear structure on the fixed frame 501, a knocking rod 506 is slidably arranged in the sleeve 505, the outer end of the knocking rod 506 is movably contacted with the crystal scooping mesh plate 4, one end of the knocking rod 506 located in the sleeve 505 is connected and fixedly arranged with a spring 507, the other end of the spring 507 is connected and fixedly arranged with the inner wall of the sleeve 505, the other end of the knocking rod 506 is connected and fixedly arranged with a contact rod 508, one end of the contact rod 508 is slidably arranged in the sleeve 505, and the outer end of the contact rod 508 is movably contacted with the shifting rod 504. The shifting rod 504 will shift the contact rod 508, and when the contact rod 508 is not in contact with the shifting rod 504, under the action of the spring 507, the knocking rod 506 will be quickly reset and hit on the crystal scooping mesh plate 4, causing it to vibrate, so that the salvaged crystals can fall into the conveying pipe 6.

[0039] like Figure 7 As shown, a feed trough 601 is provided on the feed pipe 6, one end of the feed trough 601 is connected and fixedly arranged through the evaporator tank body 1, a material guide trough 602 is connected and fixedly arranged through the outer end of the feed pipe 6, a spiral push rod 603 is rotatably connected and arranged in the feed pipe 6, one end of the spiral push rod 603 extends to the outside of the evaporator tank body 1 and is connected and fixedly arranged with a motor 604, the motor 604 is connected and fixedly arranged with the evaporator tank body 1, a rotating ring 605 is connected and fixedly arranged on the spiral push rod 603, a ring rack B606 is connected and fixedly arranged on the rotating ring 605, and the ring rack B606 is meshed with the driving wheel 203 for transmission, the other end of the spiral push rod 603 extends to the outside of the feed pipe 6 and is connected and fixedly arranged with a universal joint 607, and the other end of the universal joint 607 is connected and fixedly arranged with a sector gear 608. The rotating spiral push rod 603 can inject crystals from the guide groove 602 into the discharge seat 7. At this time, the spiral push rod 603 will drive the fan gear 608 connected to the universal joint 607 to rotate, so that the fan gear 608 drives the push impeller 702 connected to the adjusting wheel 703 to rotate intermittently.

[0040] like Figure 8 As shown, the feed port of the discharge seat 7 is connected and fixedly arranged with the guide groove 602, and a discharge port 701 is opened at the bottom of the other side of the discharge seat 7. A pusher impeller 702 is rotatably connected and arranged in the discharge seat 7. One end of the pusher impeller 702 passes through the inner wall of the discharge seat 7 and extends to the outside and is connected and fixedly arranged with an adjustment wheel 703. The adjustment wheel 703 is movably meshed and driven with the sector gear 608. The pusher impeller 702 rotates intermittently, so that while the crystals are pushed out through the discharge port 701 for extraction, the feed port of the discharge seat 7 and the discharge port 701 are separated, so as to reduce the external gas from entering the evaporator tank body 1.

[0041] A method for using an evaporation crystallization device for extracting high-purity ammonium rhenate comprises the following steps:

[0042] S1. When performing evaporation and crystallization extraction of high-purity ammonium rhenate, firstly, the high-purity ammonium rhenate solution is injected into the evaporator tank body 1, and the liquid level of the solution is lower than the opening of the material receiving seat 2. At this time, the evaporator tank body 1 is used to heat the solution to evaporate the water inside it and form crystals;

[0043] S2, after crystallization occurs, the rotating baffle plate 3 is used to drive the crystal scooping screen plate 4 to rotate, so as to separate the crystals in the solution from the solution;

[0044] S3, when the crystal scooping mesh plate 4 rotates to the upper side, the crystal scooping mesh plate 4 vibrates under the action of knocking the material discharge mechanism 5, so that the crystal can fall into the material delivery pipe 6 in the material receiving seat 2;

[0045] S4, then the crystals are transported to the discharging seat 7 through the conveying pipe 6 for intermittent discharging.

[0046] Working principle: When the evaporation and crystallization of high-purity ammonium rhenate is required, the solution is injected into the evaporator tank body 1 through the feed pipe 102, and then the solution is heated by the evaporator tank body 1 to evaporate and concentrate it, and the evaporated steam is discharged through the steam discharge pipe 103;

[0047] When the solution is concentrated to a certain amount, crystals will be formed. At this time, the motor 604 is used to drive the connected spiral push rod 603 to rotate. At this time, the annular rack B606 on the rotating ring 605 connected to the spiral push rod 603 rotates, so that the annular rack B606 drives the driving wheel 203 to rotate. At this time, the driving wheel 203 drives the rotating shaft 202 to rotate, so that the rotating shaft 202 drives the connected driven wheel 204 to rotate, so that the driven wheel 204 drives the baffle 3 connected to the annular rack A301 to rotate, and at this time the baffle 3 drives the connected crystal scooping mesh plate 4 to rotate around the material receiving seat 2, so as to separate the crystals in the solution from the solution;

[0048] When the crystal scooping mesh plate 4 rotates to the upper side of the receiving seat 2, the driving rod 502 connected to the driving wheel 503 rotates under the action of the arc-shaped rack 104, so that the driving rod 502 drives multiple levers 504 to rotate, and the lever 504 will move the contact rod 508. When the contact rod 508 is not in contact with the lever 504, the knocking rod 506 is quickly reset under the action of the spring 507, and hits the crystal scooping mesh plate 4, causing it to vibrate, so that the salvaged crystals can fall into the material conveying pipe 6;

[0049] Then the rotating spiral push rod 603 can inject the crystals from the guide groove 602 into the discharge seat 7. At this time, the spiral push rod 603 will drive the fan gear 608 connected to the universal joint 607 to rotate, so that the fan gear 608 drives the push impeller 702 connected to the adjusting wheel 703 to rotate intermittently, thereby pushing the crystals out through the discharge port 701 for extraction, and separating the feed port of the discharge seat 7 from the discharge port 701, reducing the entry of external gas into the evaporator tank body 1, and maintaining the temperature inside the evaporator tank body 1.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An evaporation crystallization device for extracting high-purity ammonium rhenate, comprising an evaporator tank body (1), characterized in that: A material receiving seat (2) is fixedly connected to the inside of the evaporator tank body (1), a baffle (3) is rotatably connected to the inside of the evaporator tank body (1), a crystal scooping mesh plate (4) is fixedly connected to the baffle (3), a knocking material discharge mechanism (5) is fixedly connected to the baffle (3), a material conveying pipe (6) is fixedly connected to the inside of the material receiving seat (2), and a material discharge seat (7) is fixedly connected to the outside of one end of the evaporator tank body (1).

2. The evaporation crystallization device for extracting high-purity ammonium rhenate according to claim 1, characterized in that: Two support legs (101) are fixedly connected to the tank body (1) of the evaporator tank; a feed pipe (102) is fixedly connected to one side of the tank body (1); a steam discharge pipe (103) is fixedly connected to the top of the tank body (1); and an arc-shaped rack (104) is fixedly connected to the inner wall of one side of the tank body (1).

3. The evaporation crystallization device for extracting high-purity ammonium rhenate according to claim 1, characterized in that: The material receiving seat (2) is provided with a material receiving groove (201), and a rotating shaft (202) is rotatably connected and penetrates the inner wall of one end of the material receiving seat (2), a driving wheel (203) is fixedly connected to the inner end of the rotating shaft (202), and a driven wheel (204) is fixedly connected to the outer end of the rotating shaft (202).

4. The evaporation crystallization device for extracting high-purity ammonium rhenate according to claim 1, characterized in that: The baffle (3) is located on one side of the driven wheel (204) and is connected and fixedly provided with an annular rack A (301), and the annular rack A (301) is meshed and transmission-engaged with the driven wheel (204).

5. The evaporation crystallization device for extracting high-purity ammonium rhenate according to claim 1, characterized in that: The knocking unloading mechanism (5) comprises a fixed frame (501), the fixed frame (501) is connected and fixedly arranged with the baffle plate (3), a transmission rod (502) is rotatably connected and arranged on the fixed frame (501), one end of the transmission rod (502) passes through the baffle plate (3) and is connected and fixedly arranged with a transmission wheel (503), the transmission wheel (503) is meshed with an arc-shaped rack (104) for transmission, and a plurality of shifting rods (504) are connected and fixedly arranged on the outside of the transmission rod (502) in a spiral structure.

6. The evaporation crystallization device for extracting high-purity ammonium rhenate according to claim 5, characterized in that: A plurality of sleeves (505) are connected and fixedly arranged in a linear structure on the fixed frame (501), a knocking rod (506) is slidably arranged in the sleeve (505), the outer end of the knocking rod (506) is movably contacted with the crystal scooping mesh plate (4), one end of the knocking rod (506) located in the sleeve (505) is connected and fixedly arranged with a spring (507), the other end of the spring (507) is connected and fixedly arranged with the inner wall of the sleeve (505), the other end of the knocking rod (506) is connected and fixedly arranged with a contact rod (508), one end of the contact rod (508) is slidably arranged in the sleeve (505), and the outer end of the contact rod (508) is movably contacted with the shifting rod (504).

7. The evaporation crystallization device for extracting high-purity ammonium rhenate according to claim 1, characterized in that: The feed pipe (6) is provided with a feed trough (601), one end of which is connected to and fixedly disposed through the evaporator tank body (1), a material guide trough (602) is connected to and fixedly disposed through the outer end of the feed pipe (6), a spiral push rod (603) is rotatably disposed through the inside of the feed pipe (6), one end of which extends to the outside of the evaporator tank body (1) and is connected to and fixedly disposed with a motor (604), the motor (604) being connected to the evaporator tank body. (1) Connected and fixedly arranged, the spiral push rod (603) is connected and fixedly arranged with a rotating ring (605), the rotating ring (605) is connected and fixedly arranged with an annular rack B (606), the annular rack B (606) is meshed with the driving wheel (203) for transmission, the other end of the spiral push rod (603) extends to the outside of the conveying pipe (6) and is connected and fixedly arranged with a universal joint (607), and the other end of the universal joint (607) is connected and fixedly arranged with a sector gear (608).

8. The evaporation crystallization device for extracting high-purity ammonium rhenate according to claim 1, characterized in that: The feed port of the discharge seat (7) is connected and fixedly arranged with the guide groove (602), and a discharge port (701) is opened at the bottom of the other side of the discharge seat (7). A pusher impeller (702) is rotatably connected and arranged inside the discharge seat (7), and one end of the pusher impeller (702) passes through the inner wall of the discharge seat (7) and extends to the outside and is connected and fixedly arranged with an adjustment wheel (703), and the adjustment wheel (703) is movably meshed with the fan gear (608) for transmission.

9. A method for using an evaporation crystallization device for extracting high-purity ammonium rhenate, using the evaporation crystallization device for extracting high-purity ammonium rhenate according to any one of claims 1 to 8, comprising the following steps: S1. When performing evaporation and crystallization extraction of high-purity ammonium rhenate, firstly, a high-purity ammonium rhenate solution is injected into the evaporator tank body (1), and the liquid level of the solution is lower than the opening of the material receiving seat (2). At this time, the evaporator tank body (1) is used to heat the solution to evaporate the water inside the solution to form crystals; S2, after crystals appear, the crystal scooping screen (4) is driven to rotate by the rotating baffle (3) to separate the crystals in the solution from the solution; S3, when the crystal scooping mesh plate (4) rotates to the upper side, the knocking discharge mechanism (5) causes the crystal scooping mesh plate (4) to vibrate, so that the crystals can fall into the material delivery pipe (6) in the material receiving seat (2); S4. Then, the crystals are transported to the discharging seat (7) through the conveying pipe (6) for intermittent discharging.

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