CN220736226U

CN220736226U - Rectification dewatering device that isothiocyanate preparation was used

Info

Publication number: CN220736226U
Application number: CN202322092734.4U
Authority: CN
Inventors: 刘加利; 刘纯
Original assignee: Weifang Jiahua Chemical Co ltd
Current assignee: Weifang Jiahua Chemical Co ltd
Priority date: 2023-08-03
Filing date: 2023-08-03
Publication date: 2024-04-09
Anticipated expiration: 2033-08-03

Abstract

The utility model discloses a rectification dehydration device for preparing allyl isothiocyanate, which comprises a rectification kettle, wherein a feed inlet is arranged on one side of the rectification kettle, a second pipeline is fixedly arranged at the top of the rectification kettle, an inner barrel is fixedly arranged at one end of the second pipeline, an outer barrel is sleeved outside the inner barrel, and a cooling mechanism is arranged at the top of the outer barrel. This rectification dewatering device that isothiocyanate preparation was used, when carrying out extrusion layering discharge to water and rectification, as long as have the inside of water entering purifying box, be located the inside vertical stirring roller of purifying box just can stir water and purifying agent under the drive of motor, need not to consider electric telescopic handle's operating condition, two driving sources of two mechanisms separately drive, just can start rabbling mechanism and carry out intensive mixing to water and purifying agent when realizing the layering, improved the purification efficiency to the water after the isothiocyanate rectification dehydration greatly.

Description

Rectification dewatering device that isothiocyanate preparation was used

Technical Field

The utility model relates to the technical field of preparation of allyl isothiocyanate, in particular to a rectification dehydration device for preparing allyl isothiocyanate.

Background

Allyl isothiocyanate, which is an organic compound and has the chemical formula of C ₄ H ₅ NS is mainly used for preparing spices and mustard-type essence, and is used for kimchi, cans, sauces, seasonings, and the like, and can also be used as a fumigant, a military poison gas, and the like, and in the production and preparation process of allyl isothiocyanate organic compounds, water is often produced by reactants or side reactants, so that the purity of the organic compounds is limited, the use of the organic compounds is affected, and the organic compounds are dehydrated in a dehydration manner.

The utility model discloses an organic matter azeotropic distillation dewatering device, publication number is CN212789829U, chinese patent discloses, it includes the frame, the frame internal rotation is connected with the screw rod, one side fixed mounting of frame has the motor, the output shaft and the screw rod fixed connection of motor, fixed mounting has the second layer board on the frame top inner wall, rotate on the second layer board and be connected with the gear, the gear meshes with the screw rod, the frame top is equipped with the extrusion pole, fixedly connected with rack on the extrusion pole, and rack and gear engagement, frame top fixedly connected with backward flow section of thick bamboo, be equipped with the piston board in the backward flow section of thick bamboo, the cover is equipped with the rubber circle on the piston board, backward flow section of thick bamboo top is equipped with the cooler bin, the cooler bin is connected with same condenser tube with the backward flow section of thick bamboo. The utility model is convenient to use, can purify and collect the separated water, and is convenient for people to use.

In view of the above-mentioned related art, the device has some shortcomings, in the actual use process, the operation of the piston plate and the stirring rod is driven by means of a motor, and when the rectification and the water in the reflux drum are extruded and discharged through the piston plate, the piston plate cannot be frequently driven to reciprocate up and down, the piston plate needs to be slowly moved up, and the stirring rod at the moment has almost no stirring effect, so that when the rectification and the water in the reflux drum are extruded and layered and discharged by the piston plate, the stirring rod almost does not play a role, thereby influencing the stirring effect on the water and the purifying agent entering the stirring box and reducing the purifying efficiency of the water, and therefore, the rectification dehydration device for preparing the allyl isothiocyanate is necessary to solve the technical problems.

Disclosure of Invention

The utility model aims to provide a rectification dehydration device for preparing allyl isothiocyanate, which aims to solve at least one technical problem in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a rectification dehydration device for preparing allyl isothiocyanate, comprising:

the rectifying device comprises a rectifying kettle, wherein a feed inlet is formed in one side of the rectifying kettle, a second pipeline is fixedly arranged at the top of the rectifying kettle, an inner cylinder is fixedly arranged at one end of the second pipeline, an outer cylinder is sleeved outside the inner cylinder, a cooling mechanism is arranged at the top of the outer cylinder, a purifying box is fixedly arranged at the bottom of the outer cylinder, a partition plate is fixedly arranged in the purifying box, a third pipeline is fixedly arranged above one side of the inner cylinder in a penetrating manner, and a first pipeline is fixedly arranged below the other side of the inner cylinder in a penetrating manner;

the bottom of the inner cylinder is fixedly inserted and provided with a sealing sliding sleeve, a push rod is slidably arranged on the sealing sliding sleeve, the top end of the push rod is fixedly provided with a piston plate, one side of the bottom of the purifying box is fixedly inserted and provided with an electric telescopic rod, the driving end of the electric telescopic rod is fixedly connected with the bottom end of the push rod, the other side of the bottom of the purifying box is fixedly provided with a collecting box, the lower part of one side of the purifying box is fixedly inserted and provided with a fourth pipeline, and the lower part of one side of the collecting box is fixedly inserted and provided with a liquid discharge pipe;

the utility model discloses a purifying box, including purifying box, baffle, protection frame, motor, lateral stirring axle, baffle, protection frame is fixed to be installed to one side fixed interlude at purifying box top, the lateral stirring axle of symmetric distribution is installed in rotation between one side of baffle and purifying box inner wall one side, fixed mounting has a plurality of vertical stirring roller on the outer wall of lateral stirring axle, opposite side fixed mounting of baffle has the protection frame, two be provided with drive mechanism between the lateral stirring axle, the inside top fixed mounting of protection frame has the motor.

Preferably, one side of collecting box is provided with the support frame, one side of support frame rotates and installs a plurality of pivot, and the quantity of pivot is three, three be provided with chain mechanism between the pivot, fixed mounting has a plurality of blade on the outer wall of pivot, and one lateral stirring axle's the other end runs through one side of purifying box inner wall and extends to one side of support frame and one end fixed connection of a pivot.

Preferably, the port of the second pipeline inside the inner cylinder is provided with a second electric valve, the port of the first pipeline inside the inner cylinder is provided with a first electric valve, the port of the fourth pipeline inside the purifying box is provided with a fourth electric valve, and the port of the third pipeline inside the inner cylinder is provided with a third electric valve.

Preferably, the cooling mechanism comprises a condensing box, the condensing box is fixedly arranged at the top of the outer barrel, a condensing pipe is fixedly arranged at the bottom of the condensing box, one end of the condensing pipe penetrates through the space between the inner wall of the outer barrel and the outer surface of the inner barrel and is fixedly connected with a liquid inlet end above one side of the condensing box, and a pump body is arranged on the condensing pipe.

Preferably, the condensing tube is spirally fixed on the outer surface of the inner cylinder in a surrounding manner.

Preferably, the front surfaces of the inner cylinder and the outer cylinder are fixedly embedded with visual transparent glass.

Preferably, the transmission mechanism consists of a driving wheel, a driven wheel and a belt, the driving wheel and the driven wheel are connected through the belt transmission, and the driving wheel and the driven wheel are respectively fixedly sleeved on the outer walls of one ends of the two transverse stirring shafts.

Preferably, the chain mechanism consists of gears and chains, the number of the gears corresponds to that of the rotating shafts, the gears are connected with the chains in a meshed mode, and the gears are fixedly sleeved on the outer walls of the rotating shafts.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, through the cooperation of the rectifying still, the electric telescopic rod, the sealing sliding sleeve, the push rod, the piston plate, the first pipeline, the first electric valve, the second pipeline, the second electric valve, the pump body, the condensing box, the condensing pipe, the transmission mechanism, the third electric valve, the outer barrel, the inner barrel, the third pipeline, the purifying box, the fourth pipeline, the collecting box, the fourth electric valve, the vertical stirring roller, the transverse stirring shaft, the partition plate and the motor, when water and rectification are extruded and layered to be discharged, the vertical stirring roller in the purifying box can stir the water and the purifying agent under the driving of the motor without considering the working state of the electric telescopic rod, the two driving sources of the two mechanisms are separately driven, the stirring mechanism can be started to sufficiently stir the water and the purifying agent while layering is realized, the purifying efficiency of the water after the propylene isothiocyanate is rectified and dehydrated is greatly improved, the stirring mechanism adopts the stirring effect which is better, the double-shaft purifying effect of the water is improved.

2. According to the utility model, through the cooperation of the rotating shaft, the chain mechanism, the blades and the supporting frame, the rotation of the blades generates high-speed air flow to form air, the air is blown to the area where the rectification and dehydration device is located, the high ventilation property of the area where the rectification and dehydration device is located is kept, steam is prevented from leaking into the air of a workplace, the safety of workers in the area where the device is located is improved, meanwhile, the rotation of the blades and the rotation of the vertical stirring roller share one driving source, the running cost of the device is reduced, and the practicability of the device is improved.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is a schematic elevational view of the present utility model;

FIG. 3 is a schematic view of the outer cylinder and inner cylinder according to the present utility model;

fig. 4 is a schematic view of a partial cross-sectional structure of the present utility model.

In the figure: 1. a rectifying still; 2. an electric telescopic rod; 3. sealing the sliding sleeve; 4. a push rod; 5. a piston plate; 6. a first pipe; 7. a first electrically operated valve; 8. a second pipe; 9. a second electrically operated valve; 10. a pump body; 11. a condensing box; 12. a condensing tube; 13. a transmission mechanism; 14. a third electrically operated valve; 15. a protective frame; 16. an outer cylinder; 17. an inner cylinder; 18. a third conduit; 19. a rotating shaft; 20. a purifying box; 21. a chain mechanism; 22. a blade; 23. a support frame; 24. a fourth conduit; 25. a collection box; 26. visual transparent glass; 27. a fourth electrically operated valve; 28. a vertical stirring roller; 29. a transverse stirring shaft; 30. a partition plate; 31. and a motor.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, an embodiment of the present utility model is provided:

the rectifying still 1, one side of rectifying still 1 is provided with the feed inlet, the top of rectifying still 1 is fixedly provided with the second pipeline 8, and second pipeline 8 is linked together with the inside of rectifying still 1, one end of second pipeline 8 is fixedly provided with the inner tube 17, and second pipeline 8 is linked together with the inside of inner tube 17, the outside of inner tube 17 is overlapped and is equipped with urceolus 16, the top of urceolus 16 is provided with cooling mechanism, the bottom of urceolus 16 is fixedly provided with purifying box 20, the inside of purifying box 20 is fixedly provided with baffle 30, the top of one side of inner tube 17 is fixedly and alternately provided with third pipeline 18, and one end of third pipeline 18 runs through the top of one side of inner wall of urceolus 16 and one side of top of purifying box 20 in proper order and is linked together with the inside of purifying box 20, the below of the opposite side of inner wall of urceolus 16 and one side of rectifying still 1 in proper order is alternately provided with first pipeline 6, and one end of first pipeline 6 runs through the below of opposite side of inner wall of urceolus 16 and one side of top of rectifying still 1 in proper order and is linked together with inside of rectifying still 1;

the bottom of the inner cylinder 17 is fixedly and alternately provided with a sealing sliding sleeve 3, the bottom end of the sealing sliding sleeve 3 sequentially penetrates through the bottom of the inner wall of the outer cylinder 16 and the other side of the top of the purifying box 20, the sealing sliding sleeve 3 is provided with a push rod 4 in a sliding manner, the top end of the push rod 4 is fixedly provided with a piston plate 5, the piston plate 5 is in sliding connection with the inner wall of the inner cylinder 17, one side of the bottom of the purifying box 20 is fixedly and alternately provided with an electric telescopic rod 2, the driving end of the electric telescopic rod 2 is fixedly connected with the bottom end of the push rod 4, the other side of the bottom of the purifying box 20 is fixedly and alternately provided with a collecting box 25, the lower part of one side of the purifying box 20 is fixedly and alternately provided with a fourth pipeline 24, one end of the fourth pipeline 24 penetrates through the upper part of one side of the collecting box 25 and is communicated with the inner part of the collecting box 25, and the lower part of one side of the collecting box 25 is fixedly and alternately provided with a liquid discharge pipe;

a feeding pipe is fixedly installed on one side of the top of the purifying box 20 in a penetrating mode, a symmetrically-distributed transverse stirring shaft 29 is rotatably installed between one side of the partition plate 30 and one side of the inner wall of the purifying box 20, a plurality of vertical stirring rollers 28 are fixedly installed on the outer wall of the transverse stirring shaft 29, one ends of the two transverse stirring shafts 29 penetrate through one side of the partition plate 30 and extend to the other side of the partition plate 30, a protection frame 15 is fixedly installed on the other side of the partition plate 30, a transmission mechanism 13 is arranged between the two transverse stirring shafts 29, a motor 31 is fixedly installed above the inside of the protection frame 15, and the driving end of the motor 31 is fixedly connected with one end of one transverse stirring shaft 29.

One side of the collecting box 25 is provided with a supporting frame 23, one side of the supporting frame 23 is rotatably provided with a plurality of rotating shafts 19, the number of the rotating shafts 19 is three, a chain mechanism 21 is arranged between the three rotating shafts 19, a plurality of blades 22 are fixedly arranged on the outer wall of the rotating shafts 19, and the other end of one transverse stirring shaft 29 penetrates one side of the inner wall of the purifying box 20 and extends to one side of the supporting frame 23 to be fixedly connected with one end of one rotating shaft 19.

In one embodiment, the second electric valve 9 is disposed at the port of the second pipe 8 located inside the inner cylinder 17, the first electric valve 7 is disposed at the port of the first pipe 6 located inside the inner cylinder 17, the fourth electric valve 27 is disposed at the port of the fourth pipe 24 located inside the purifying tank 20, and the third electric valve 14 is disposed at the port of the third pipe 18 located inside the inner cylinder 17, so that water is prevented from entering the second pipe 8 when the inner cylinder is rectified and discharged in a layered manner, the dehydration quality of allyl isothiocyanate is reduced when the second electric valve 9 is opened again, and meanwhile, all valves adopt electric valves, so that the automation degree of the device is improved, the probability of approaching operation is reduced, and the hazard caused by once steam leakage is generated during operation of the device is great.

In one preferred embodiment, the cooling mechanism includes a condensation tank 11, the condensation tank 11 is fixedly mounted on the top of the outer cylinder 16, a condensation pipe 12 is fixedly mounted at the bottom of the condensation tank 11, the condensation pipe 12 is communicated with the interior of the condensation tank 11, one end of the condensation pipe 12 penetrates through the space between the inner wall of the outer cylinder 16 and the outer surface of the inner cylinder 17 and is fixedly connected with a liquid inlet end above one side of the condensation tank 11, a pump body 10 is arranged on the condensation pipe 12, and the pump body 10 is fixedly connected with one side of the condensation tank 11.

In one embodiment, the condensation pipe 12 is spirally fixed on the outer surface of the inner cylinder 17, so as to increase the contact time between the condensate in the condensation pipe 12 and the inner cylinder 17, and the condensation effect is better.

In one preferred embodiment, the front surfaces of the inner cylinder 17 and the outer cylinder 16 are fixedly embedded with visual transparent glass 26, so that the internal rectification and water discharge condition of the inner cylinder 17 can be conveniently observed.

In one embodiment, the transmission mechanism 13 is composed of a driving wheel, a driven wheel and a belt, the driving wheel and the driven wheel are connected through the belt transmission, and the driving wheel and the driven wheel are fixedly sleeved on the outer walls of one ends of the two transverse stirring shafts 29 respectively.

In one preferred embodiment, the chain mechanism 21 is composed of gears and chains, the number of the gears corresponds to that of the rotating shaft 19, the gears are meshed with the chains, and the gears are fixedly sleeved on the outer wall of the rotating shaft 19.

The working principle of the utility model is as follows: the electric components in the application are externally connected and communicated with a power supply and a controller when the electric components are used, parts which are not involved in the device are the same as or can be realized by adopting the prior art, allyl isothiocyanate which needs to be rectified and dehydrated is added into the electric components through a feed inlet at one side of the rectifying still 1, the rectifying still 1 is heated, the second electric valve 9 is opened, meanwhile, condensate in the condensing box 11 is pumped into the condensing pipe 12 through the pump body 10 and finally flows back into the condensing box 11, the condensate in the condensing pipe 12 is always in a circulating state, the distilled products reach the boiling point to boil, the distilled products form water vapor, the water vapor enters the inner barrel 17 through the second pipeline 8, the condensate circularly flowing in the condensing pipe 12 condenses the water vapor entering the inner barrel through the outer wall of the inner barrel 17, the condensed water and rectification are layered in the inner cylinder 17 due to different densities, the first electric valve 7 and the third electric valve 14 are controlled to open and close the second electric valve 9, the electric telescopic rod 2 starts to work, the water at the upper layer is discharged into the right side area of the partition plate 30 in the purifying box 20 through the third pipeline 18, the piston plate 5 is driven to move upwards by the push rod 4 under the action of the driving end of the electric telescopic rod 2, the rectification and the water in the inner cylinder 17 are continuously extruded upwards until the water is completely discharged to the right side of the partition plate 30 in the purifying box 20 through the third pipeline 18, the motor 31 starts to work at the same time, the piston plate 5 is reset through the driving of the electric telescopic rod 2, the rest rectification in the inner cylinder 17 is returned into the purifying box 1 through the first pipeline 6, the driving end of the motor 31 drives a transverse stirring shaft 29 to rotate, the transmission effect of the transmission mechanism 13 enables two transverse stirring shafts 29 to rotate simultaneously, the rotation of the transverse stirring shafts 29 drives the vertical stirring rollers 28 to rotate, the rotation of the vertical stirring rollers 28 can continuously stir water and purifying agent inside the purifying box 20 fully, after water purification is completed, the fourth electric valve 27 is opened to discharge water into the collecting box 25 through the fourth pipeline 24, when water and rectification are extruded and layered to be discharged, as long as water enters the purifying box 20, the vertical stirring rollers 28 inside the purifying box 20 can stir the water and the purifying agent under the driving of the motor 31, the two driving sources of the two mechanisms are driven separately, the stirring mechanism can be started to stir the water and the purifying agent fully while layering is realized, the purifying efficiency of the water after rectification and dehydration of the allyl isothiocyanate is greatly improved, the stirring mechanism adopts double-shaft stirring effect is better, the full fusion of the water and the purifying agent is facilitated, and the purifying effect of the water is improved.

When the device is operated, the rotation of the transverse stirring shaft 29 drives one rotating shaft 19 to rotate, the three rotating shafts 19 simultaneously rotate through the transmission effect of the chain mechanism 21, the rotation of the rotating shafts 19 drives the blades 22 to rotate, the rotation of the blades 22 generates high-speed airflow to form wind, the wind blows to the area where the rectification and dehydration device is located, the high ventilation of the area where the rectification and dehydration device is located is maintained, steam is prevented from leaking into the air of a workplace, the safety of workers in the area where the device is located is improved, meanwhile, the rotation of the blades 22 and the rotation of the vertical stirring rollers 28 share one driving source, the operation cost of the device is reduced, and the practicability of the device is improved.

The foregoing is merely exemplary embodiments of the present utility model, and specific structures and features that are well known in the art are not described in detail herein. It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a rectification dewatering device that isothiocyanate preparation was used which characterized in that, it includes:

rectifying still (1), one side of rectifying still (1) is provided with the feed inlet, the top fixed mounting of rectifying still (1) has second pipeline (8), the one end fixed mounting of second pipeline (8) has inner tube (17), the outside cover of inner tube (17) is equipped with urceolus (16), the top of urceolus (16) is provided with cooling body, the bottom fixed mounting of urceolus (16) has purifying box (20), the inside fixed mounting of purifying box (20) has baffle (30), the top fixed interlude of inner tube (17) one side is installed third pipeline (18), the below fixed interlude of inner tube (17) opposite side is installed first pipeline (6);

the bottom of the inner cylinder (17) is fixedly inserted and installed with a sealing sliding sleeve (3), the sealing sliding sleeve (3) is slidably provided with a push rod (4), the top end of the push rod (4) is fixedly provided with a piston plate (5), one side of the bottom of the purifying box (20) is fixedly inserted and installed with an electric telescopic rod (2), the driving end of the electric telescopic rod (2) is fixedly connected with the bottom end of the push rod (4), the other side of the bottom of the purifying box (20) is fixedly provided with a collecting box (25), the lower part of one side of the purifying box (20) is fixedly inserted and installed with a fourth pipeline (24), and the lower part of one side of the collecting box (25) is fixedly inserted and installed with a liquid discharge pipe;

the utility model discloses a purifying box, including purifying box (20), baffle (30), protection frame (15) are installed to the opposite side fixed mounting of baffle (30), and be provided with drive mechanism (13) between lateral stirring axle (29), motor (31) are installed to the top fixed mounting of inside top of protection frame (15) in lateral stirring axle (29) on the outer wall of (29) lateral stirring axle (29), lateral stirring axle (29) is installed to one side fixed interlude at purifying box (20) top, and rotation installs symmetrical distribution's lateral stirring axle (29) between one side and purifying box (20) inner wall one side.

2. The rectifying and dehydrating device for preparing allyl isothiocyanate according to claim 1, wherein: one side of collection box (25) is provided with support frame (23), one side of support frame (23) rotates and installs a plurality of pivot (19), and the quantity of pivot (19) is three, and is three be provided with chain mechanism (21) between pivot (19), fixed mounting has a plurality of blade (22) on the outer wall of pivot (19), and one side that the other end of a horizontal (mixing) shaft (29) runs through purifying box (20) inner wall and extends to one side of support frame (23) and one end fixed connection of pivot (19).

3. The rectifying and dehydrating device for preparing allyl isothiocyanate according to claim 1, wherein: the port of second pipeline (8) inside being located inner tube (17) is provided with second motorised valve (9), the port of first pipeline (6) inside being located inner tube (17) is provided with first motorised valve (7), the port of fourth pipeline (24) inside being located purifying box (20) is provided with fourth motorised valve (27), the port of third pipeline (18) inside being located inner tube (17) is provided with third motorised valve (14).

4. The rectifying and dehydrating device for preparing allyl isothiocyanate according to claim 1, wherein: the cooling mechanism comprises a condensing box (11), the condensing box (11) is fixedly arranged at the top of an outer barrel (16), a condensing pipe (12) is fixedly arranged at the bottom of the condensing box (11), one end of the condensing pipe (12) penetrates through the space between the inner wall of the outer barrel (16) and the outer surface of an inner barrel (17) and is fixedly connected with a liquid inlet end above one side of the condensing box (11), and a pump body (10) is arranged on the condensing pipe (12).

5. The rectifying and dehydrating device for preparing allyl isothiocyanate according to claim 4, wherein: the condensing tube (12) is spirally fixed on the outer surface of the inner cylinder (17).

6. The rectifying and dehydrating device for preparing allyl isothiocyanate according to claim 1, wherein: the front surfaces of the inner cylinder (17) and the outer cylinder (16) are fixedly embedded with visual transparent glass (26).

7. The rectifying and dehydrating device for preparing allyl isothiocyanate according to claim 1, wherein: the transmission mechanism (13) consists of a driving wheel, a driven wheel and a belt, the driving wheel and the driven wheel are connected through the belt transmission, and the driving wheel and the driven wheel are respectively fixedly sleeved on the outer walls of one ends of the two transverse stirring shafts (29).

8. The rectifying and dehydrating device for preparing allyl isothiocyanate according to claim 2, wherein: the chain mechanism (21) consists of gears and chains, the number of the gears corresponds to that of the rotating shafts (19), the gears are connected with the chains in a meshed mode, and the gears are fixedly sleeved on the outer wall of the rotating shafts (19).