Vacuum drying device for lithium borohydride production

Abstract

The vacuum drying device comprises a reaction kettle, a bidirectional stirring device and a waste gas collecting device, an L-shaped plate, a fixing plate and a limiting plate are arranged on the upper side of the reaction kettle, and the bidirectional stirring device comprises a motor, a first bevel gear, a stirring shaft, a second bevel gear, a third bevel gear, a stirring shaft sleeve, a first stirring paddle and a second stirring paddle. The reaction kettle is provided with an interlayer, a vacuum pump is arranged on the upper side of the reaction kettle, the waste gas collecting device comprises a gas outlet pipe, a collecting barrel and a gas outlet, and a feeding port is formed in the upper side of the reaction kettle. In particular to a vacuum drying device for lithium borohydride production. The problems that due to single-direction stirring, stirring is not uniform when lithium borohydride powder is heated, the drying speed is low, an organic solvent has toxicity, and due to the fact that the gasified organic solvent is not collected during vacuumizing, air pollution is caused, and harm is caused to the body of a worker are effectively solved. The vacuum drying device is a novel modern vacuum drying device for lithium borohydride production.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium borohydride production, in particular to a vacuum drying device used for lithium borohydride production. Background Art

[0002] The industrial preparation method of lithium borohydride is to dissolve ethyl lithium in an organic solvent (such as diethyl ether, tetrahydrofuran, etc.), and then continuously introduce diborane to allow ethyl lithium and diborane to react in the organic solvent. A white crystal can be obtained as the product. The prepared lithium borohydride is a crystal containing an organic solvent, which needs to be vacuum dried to remove the organic solvent.

[0003] In the prior art, a Chinese patent with publication number CN217715651U discloses a vacuum drying device for lithium borohydride production. By arranging an inner cylinder, an outer cylinder, a heating resistor wire, a sealing plate, a rotating shaft, a stirring plate, a servo motor and a scraper, the lithium borohydride raw material can be stirred to make it evenly heated and accelerate the drying speed. At the same time, the scraper can be set to clean the raw material attached to the inner wall. By arranging an air pump, an air suction pipe, an exhaust pipe and a pressure vacuum gauge, the inner cylinder can be vacuumed. By arranging the above structure, the vacuum drying device has the advantage of being easy to use when in use, solves the problem that the original vacuum drying device is inconvenient to use when in use, thereby improving the drying speed.

[0004] However, the unidirectional stirring of the above device will lead to uneven stirring when the lithium borohydride powder is heated, slow drying speed, toxic organic solvents, and the vaporized organic solvents are not collected during vacuuming, which will cause air pollution and harm to the workers' health. Utility Model Content

[0005] The problem to be solved by the utility model is that unidirectional stirring will lead to uneven stirring when lithium borohydride powder is heated, slow drying speed, toxic organic solvents, and no collection of vaporized organic solvents during vacuuming, which will pollute the air and cause harm to workers' health.

[0006] In order to solve the above technical problems, the utility model proposes a vacuum drying device for lithium borohydride production, comprising a reactor, a two-way stirring device and an exhaust gas collecting device, wherein the two-way stirring device is fixed on the reactor, the exhaust gas collecting device is connected to the reactor, an L plate, a fixing plate and a limiting plate are arranged on the upper side of the reactor, one end of the limiting plate is fixed on the L plate and the other end is fixed on the reactor, the two-way stirring device comprises a motor, a bevel gear 1, a stirring shaft, a bevel gear 2, a bevel gear 3, a stirring shaft sleeve, a stirring paddle 1 and a stirring paddle 2, one side of the motor is fixed on The other side of the fixed plate is fixed on the L plate, the bevel gear 1 is fixed on the output shaft of the motor, one end of the stirring shaft is rotatably set on the L plate and the other end is rotatably set to penetrate into the reactor, the bevel gear 2 is fixedly connected to the stirring shaft, the bevel gear 3 is rotatably set on the stirring shaft, one end of the stirring shaft sleeve is fixed on the bevel gear 3 and the other end is rotatably set to penetrate into the reactor, the stirring shaft sleeve is sleeved on the outside of the stirring shaft and rotates relative to the stirring shaft, the stirring paddle 1 is fixed on the stirring shaft, the stirring paddle 2 is fixed on the stirring shaft sleeve, and the stirring paddle 1 and the stirring paddle 2 are staggered.

[0007] Furthermore, the reactor is provided with an interlayer, and the interlayer is filled with heat transfer oil.

[0008] Furthermore, a vacuum pump is provided on the upper side of the reactor, and an exhaust pipe inserted into the reactor is provided at one end of the vacuum pump.

[0009] Furthermore, the exhaust gas collecting device includes an exhaust pipe, a collecting barrel and an exhaust port. One end of the exhaust pipe is connected to a vacuum pump and the other end extends into the bottom of the collecting barrel. The collecting barrel is provided with an exhaust port and an organic solvent absorption liquid.

[0010] Furthermore, a feeding port is provided on the upper side of the reaction kettle, and a discharging port is provided on the lower side of the reaction kettle.

[0011] Furthermore, a scraper is provided on one side of the stirring shaft sleeve.

[0012] Furthermore, support legs are provided on the lower side of the reactor.

[0013] The beneficial effects achieved by the utility model using the above structure are as follows:

[0014] A two-way stirring device is used to solve the problem that one-way stirring will cause uneven stirring of lithium borohydride powder when heated and slow drying speed. A collecting device is used to solve the problem that organic solvents are toxic and the vaporized organic solvents are not collected during vacuuming, which will pollute the air and cause harm to the workers' health. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a schematic diagram of the overall structure of a vacuum drying device for lithium borohydride production proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure from another angle of a vacuum drying device for lithium borohydride production proposed by the utility model;

[0017] Figure 3 This is a cross-sectional view of a vacuum drying device for lithium borohydride production proposed by the utility model;

[0018] Figure 4 This is a cross-sectional view from another angle of a vacuum drying device for lithium borohydride production proposed by the utility model.

[0019] Among them, 1. reactor, 2. two-way stirring device, 3. exhaust gas collecting device, 4. L-plate, 5. fixed plate, 6. limit plate, 7. motor, 8. bevel gear one, 9. stirring shaft, 10. bevel gear two, 11. bevel gear three, 12. stirring shaft sleeve, 13. stirring paddle one, 14. stirring paddle two, 15. interlayer, 16. vacuum pump, 17. exhaust pipe, 18. exhaust pipe, 19. collecting barrel, 20. outlet, 21. feeding port, 22. discharge port, 23. scraper, 24. supporting leg.

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] like Figure 1-4As shown, the utility model proposes a vacuum drying device for lithium borohydride production, comprising a reactor 1, a bidirectional stirring device 2 and an exhaust gas collecting device 3, the bidirectional stirring device 2 is fixed on the reactor 1, and the exhaust gas collecting device 3 is connected to the reactor 1. In order to fix the bidirectional stirring device 2, an L plate 4, a fixing plate 5 and a limiting plate 6 are provided on the upper side of the reactor 1, and one end of the limiting plate 6 is fixed on the L plate 4 and the other end is fixed on the reactor 1. The bidirectional stirring device 2 comprises a motor 7, a bevel gear 1 8, a stirring shaft 9, a bevel gear 2 10, a bevel gear 3 11, a stirring shaft sleeve 12, a stirring paddle 1 13 and a stirring paddle 2 14, and the motor 7 One side is fixed on the fixed plate 5 and the other side is fixed on the L plate 4, the bevel gear 1 8 is fixed on the output shaft of the motor 7, one end of the stirring shaft 9 is rotatably arranged on the L plate 4, and the other end is deeply inserted into the reactor 1, the bevel gear 2 10 is fixedly connected to the stirring shaft 9, the bevel gear 3 11 is rotatably arranged on the stirring shaft 9, one end of the stirring shaft sleeve 12 is fixed on the bevel gear 3 11 and the other end is deeply inserted into the reactor 1, the stirring shaft sleeve 12 is sleeved on the outside of the stirring shaft 9 and rotates relative to the stirring shaft 9, the stirring paddle 13 is fixed on the stirring shaft 9, the stirring paddle 2 14 is fixed on the stirring shaft sleeve 12, and the stirring paddle 13 and the stirring paddle 2 14 are staggered.

[0023] In order to heat the raw materials and evaporate the organic solvent, the reactor 1 is provided with an interlayer 15 filled with heat transfer oil.

[0024] In order to discharge the evaporated organic solvent, a vacuum pump 16 is provided on the upper side of the reaction kettle 1 , and an exhaust pipe 17 inserted into the reaction kettle 1 is provided at one end of the vacuum pump 16 .

[0025] In order to collect organic solvents to prevent harm to workers, the waste gas collection device 3 includes an exhaust pipe 18, a collection barrel 19 and an exhaust port 20. One end of the exhaust pipe 18 is connected to the vacuum pump 16 and the other end extends into the bottom of the collection barrel 19. The collection barrel 19 is provided with an exhaust port 20, and the collection barrel 19 is provided with an organic solvent absorption liquid.

[0026] In order to facilitate the feeding and discharging of materials, a feeding port 21 is provided on the upper side of the reactor 1 , and a discharging port 22 is provided on the lower side of the reactor 1 .

[0027] In order to make the raw materials mixed more evenly, a scraper 23 is provided on one side of the stirring sleeve 12 .

[0028] In order to facilitate movement, support legs 24 are provided on the lower side of the reactor 1 .

[0029] When in use, the lithium borohydride to be dried is added into the reactor 1 through the feed port 21, the heat transfer oil is heated to evaporate the lithium borohydride, the motor 7 is slowly operated to rotate the bevel gear 1 8, thereby driving the bevel gear 2 10 and the bevel gear 3 11 to rotate in opposite directions, thereby driving the stirring shaft 9 and the stirring shaft sleeve 12 to rotate, stirring the lithium borohydride to make the heating more uniform, and operating the vacuum pump 16 to draw the evaporated organic solvent into the collection tank. Since the density of the organic solvent is greater than that of the air, the air will be discharged from the air outlet 20, thereby collecting harmful gases. The above is the use process of the entire vacuum drying device for lithium borohydride production.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] 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.

[0032] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A vacuum drying device for lithium borohydride production, characterized in that: The invention comprises a reaction kettle (1), a bidirectional stirring device (2) and an exhaust gas collecting device (3), wherein the bidirectional stirring device (2) is fixed on the reaction kettle (1), and the exhaust gas collecting device (3) is connected to the reaction kettle (1). An L plate (4), a fixing plate (5) and a limiting plate (6) are arranged on the upper side of the reaction kettle (1), and one end of the limiting plate (6) is fixed on the L plate (4) and the other end is fixed on the reaction kettle (1). The bidirectional stirring device (2) comprises a motor (7), a bevel gear 1 (8), a stirring shaft (9), a bevel gear 2 (10), a bevel gear 3 (11), a stirring shaft sleeve (12), a stirring paddle 1 (13) and a stirring paddle 2 (14), wherein one end of the motor (7) is fixed on the fixing plate (5) and the other end is fixed on the L plate (4). ), the bevel gear one (8) is fixed on the output shaft of the motor (7), one end of the stirring shaft (9) is rotatably mounted on the L plate (4), and the other end thereof is inserted into the interior of the reaction kettle (1), the bevel gear two (10) is fixedly connected to the stirring shaft (9), the bevel gear three (11) is rotatably mounted on the stirring shaft (9), one end of the stirring shaft sleeve (12) is fixed on the bevel gear three (11) and the other end thereof is inserted into the interior of the reaction kettle (1), the stirring shaft sleeve (12) is sleeved on the outside of the stirring shaft (9) and is rotatable relative to the stirring shaft (9), the stirring paddle one (13) is fixed on the stirring shaft (9), the stirring paddle two (14) is fixed on the stirring shaft sleeve (12), and the stirring paddle one (13) and the stirring paddle two (14) are arranged alternately.

2. A vacuum drying device for lithium borohydride production according to claim 1, characterized in that: The reaction kettle (1) is provided with an interlayer (15), and the interlayer (15) is filled with heat transfer oil.

3. A vacuum drying device for lithium borohydride production according to claim 2, characterized in that: A vacuum pump (16) is provided on the upper side of the reaction kettle (1), and an exhaust pipe (17) inserted into the reaction kettle (1) is provided at one end of the vacuum pump (16).

4. A vacuum drying device for lithium borohydride production according to claim 3, characterized in that: The exhaust gas collecting device (3) comprises an exhaust pipe (18), a collecting barrel (19) and an exhaust port (20); one end of the exhaust pipe (18) is connected to a vacuum pump (16) and the other end thereof extends into the bottom of the collecting barrel (19); the collecting barrel (19) is provided with an exhaust port (20); and the collecting barrel (19) is provided with an organic solvent absorption liquid.

5. A vacuum drying device for lithium borohydride production according to claim 4, characterized in that: The upper side of the reaction kettle (1) is provided with a feeding port (21), and the lower side of the reaction kettle (1) is provided with a discharging port (22).

6. A vacuum drying device for lithium borohydride production according to claim 5, characterized in that: A scraper (23) is provided on one side of the stirring shaft sleeve (12).

7. A vacuum drying device for lithium borohydride production according to claim 6, characterized in that: The lower side of the reaction kettle (1) is provided with supporting legs (24).

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