Dehydration device for tetrahydrofuran production

Abstract

The utility model discloses a dehydration device for tetrahydrofuran production, which belongs to the field of chemical production equipment and comprises a dehydration barrel, a buffer box is arranged in the dehydration barrel, a hollow column is mounted on the inner bottom wall of the buffer box, a spring is arranged in the hollow column, and the buffer box is connected with the spring. A movable column is connected to the end, away from the bottom of the temporary storage box, of the spring, a stirring barrel is welded to the end, away from the spring, of the movable column, a cross rod is connected to the top of the stirring barrel, a second motor is installed on the side face of the cross rod, and an output shaft of the second motor is connected with a second rotating shaft through a coupler; a plurality of blades used for stirring are welded to the periphery of the second rotating shaft, vertical scraping plates are installed at the ends, away from the second rotating shaft, of the blades, and heating rods are arranged between the outer wall of the stirring barrel and the inner wall of the temporary storage box. And local overheating damage is prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of chemical production equipment, especially a dehydration device for tetrahydrofuran production. BACKGROUND

[0002] Tetrahydrofuran (THF) is an important organic synthesis raw material and excellent solvent, which has a wide application in many fields such as chemical industry and medicine. However, in the production process of tetrahydrofuran, it often contains a certain amount of moisture, the existence of moisture not only affects the purity of tetrahydrofuran, but also may have adverse effects on the subsequent chemical reactions using it as raw material, reduce the reaction efficiency and even cause side reactions. The existing tetrahydrofuran production dehydration device can meet the basic dehydration demand, but the stirring is uneven during dehydration, which reduces the separation efficiency and causes local overheating damage.

[0003] After searching, Chinese patent document (authorized announcement number CN221637348U), the utility model discloses a kind of dehydration devices for tetrahydrofuran production, involve tetrahydrofuran production technical field.The utility model includes dehydration tank, dehydration tank outer surface is fixedly connected with heating plate, dehydration tank left side is fixedly connected with feed pipe, heating plate lower portion is provided with support frame, support frame inner wall is fixedly connected with dehydration tank outer surface, dehydration tank bottom right side is fixedly connected with discharge pipe, dehydration tank inside is provided with stirring assembly, dehydration tank upper portion is provided with cooling assembly, stirring assembly includes motor one, motor one top and dehydration tank bottom are fixedly connected.The utility model can meet the basic dehydration demand by setting stirring assembly, specifically is opened motor one drives rotating shaft rotation, makes two rotating frames can drive rotating plate two and rotating plate one rotation and moves up mixed liquid in bottom, so that water in mixed liquid can be better heated and vaporized, improves the dehydration efficiency of device to tetrahydrofuran, effectively reduces the content of moisture in mixed liquid, but the dehydration device for tetrahydrofuran production can meet the basic dehydration demand, but the stirring is uneven during dehydration, which reduces the separation efficiency and causes local overheating damage. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of dehydration device for tetrahydrofuran production to solve the problems raised in the background art.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a kind of dehydration device for tetrahydrofuran production, including dehydration bucket, the inside of dehydration bucket is provided with buffer box, hollow column is installed in the inner bottom wall of buffer box, spring is provided in the inside of hollow column, the end of spring far from buffer box bottom is connected with moving column, the end of moving column far from spring is welded with stirring barrel, the top of stirring barrel is connected with cross bar, second motor is installed in the side of cross bar, the top of second motor is connected with guide block, the output shaft of second motor is connected with second rotating shaft by coupling, the outer periphery of second rotating shaft is welded with a plurality of paddles for stirring, the end of paddle far from second rotating shaft is installed with vertical scraper, heating rod is arranged between the outer wall of stirring barrel and the inner wall of buffer box, the side of stirring barrel and buffer box is provided with hole for liquid flow.

[0006] Preferably, the vertical inner wall of the buffer box is installed with a corrugated plate, the inner bottom wall of the buffer box is installed with a fourth motor, the output shaft of the fourth motor is connected with a cam through a coupling, and the bottom of the stirring barrel is installed with an arc-shaped block.

[0007] Preferably, the bottom of the buffer box is installed with a third motor, the output shaft of the third motor is connected with a third rotating shaft through a coupling, and the outer periphery of the third rotating shaft is welded with a horizontal scraper.

[0008] Preferably, the top of the dehydration bucket is installed with a crossbar, and the top of the crossbar is installed with a first motor.

[0009] Preferably, the output shaft of the first motor is connected with a first rotating shaft through a coupling, and the outer periphery of the first rotating shaft is connected with a constant-temperature rod.

[0010] Preferably, the side of the dehydration bucket is connected with a cooling pipe, the outside of the cooling pipe is provided with a cooling box, the bottom of the cooling box is slidingly connected with a collection box for collecting tetrahydrofuran, and the bottom of the collection box is slidingly installed with a support block.

[0011] Preferably, the outer periphery of the dehydration bucket is connected with a liquid inlet pipe and a liquid outlet pipe.

[0012] Compared with the prior art, the utility model has the following technical effects and advantages:

[0013] The dehydrating device for tetrahydrofuran production, due to the structure of the stirring barrel, the second motor drives the rotation of the second rotating shaft and the paddle, and the tetrahydrofuran mixed solution is stirred, the fourth motor is started, the fourth motor drives the rotation of the cam, the cam moves along the edge of the arc block, and due to the action of the spring and the moving column, the stirring barrel moves in the vertical direction, the tetrahydrofuran mixed solution in the stirring barrel is heated more uniformly, and the separation of the tetrahydrofuran mixed solution is facilitated, compared with the uneven stirring of the traditional dehydrating device during dehydration, the structure can improve the separation efficiency and prevent local overheating damage.

[0014] The dehydrating device for tetrahydrofuran production, due to the structure of the stirring barrel, the second motor drives the rotation of the second rotating shaft and the paddle, and the tetrahydrofuran mixed solution is stirred, the fourth motor is started, the fourth motor drives the rotation of the cam, the cam moves along the edge of the arc block, and due to the action of the spring and the moving column, the stirring barrel moves in the vertical direction, the tetrahydrofuran mixed solution in the stirring barrel is heated more uniformly, and the separation of the tetrahydrofuran mixed solution is facilitated, compared with the uneven stirring of the traditional dehydrating device during dehydration, the structure can improve the separation efficiency and prevent local overheating damage. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0016] Fig. 1 It is a structural schematic view of the present application;

[0017] Fig. 2 It is a front view of the present application;

[0018] Fig. 3 It is a side view of the present application;

[0019] Fig. 4 It is a schematic view of the internal structure of the present application.

[0020] Explanation of reference signs:

[0021] In the diagram: 1. Dehydration tank; 101. Inlet pipe; 102. Outlet pipe; 103. First motor; 104. Horizontal frame; 105. First rotating shaft; 106. Thermostatic rod; 107. Corrugated plate; 2. Stirring tank; 201. Heating rod; 202. Paddle; 203. Guide block; 204. Second motor; 205. Crossbar; 206. Second rotating shaft; 207. Vertical scraper; 3. Third motor; 301. Buffer tank; 302. Horizontal scraper; 303. Third rotating shaft; 304. Hollow column; 305. Spring; 306. Moving column; 307. Fourth motor; 308. Cam; 309. Arc block; 4. Cooling tank; 401. Cooling pipe; 5. Collection tank; 501. Support block. Detailed Implementation

[0022] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0023] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0024] like Figs. 1 to 4 The dehydration device shown is for the production of tetrahydrofuran and includes a dehydration tank 1. A buffer tank 301 is installed inside the dehydration tank 1. A hollow column 304 is installed on the inner bottom wall of the buffer tank 301. A spring 305 is installed inside the hollow column 304. A movable column 306 is connected to the end of the spring 305 away from the bottom of the buffer tank 301. A stirring tank 2 is welded to the end of the movable column 306 away from the spring 305. A crossbar 205 is connected to the top of the stirring tank 2. A second motor 204 is installed on the side of the crossbar 205. A guide block 203 is connected to the top of the second motor 204. The output shaft of the second motor 204 is connected to a second rotating shaft 206 via a coupling. A [missing information - likely a component or material] is welded to the outer periphery of the second rotating shaft 206. Multiple impellers 202 are used for stirring. A vertical scraper 207 is installed at the end of the impeller 202 away from the second rotating shaft 206. A heating rod 201 is arranged between the outer wall of the stirring tank 2 and the inner wall of the buffer tank 301. The heating rod 201 heats the tetrahydrofuran mixture. When the temperature is reached, the tetrahydrofuran and water in the tetrahydrofuran mixture separate, and the tetrahydrofuran becomes tetrahydrofuran vapor. The sides of the stirring tank 2 and the buffer tank 301 are provided with holes for liquid flow. The tetrahydrofuran mixture flows into the stirring tank 2 along the edge of the guide block 203. The second motor 204 is turned on, and the second motor 204 drives the rotation of the second rotating shaft 206 and the impellers 202 to stir the tetrahydrofuran mixture.

[0025] A corrugated plate 107 is installed on the vertical inner wall of the buffer tank 301, and a fourth motor 307 is installed on the inner bottom wall of the buffer tank 301. The output shaft of the fourth motor 307 is connected to a cam 308 through a coupling. An arc-shaped block 309 is installed at the bottom of the stirring tank 2. When the fourth motor 307 is turned on, the fourth motor 307 drives the cam 308 to rotate. The cam 308 moves along the edge of the arc-shaped block 309. Due to the action of the spring 305 and the moving column 306, the stirring tank 2 produces vertical movement, and the tetrahydrofuran mixture in the stirring tank 2 is heated more evenly, which is beneficial to the separation of the tetrahydrofuran mixture.

[0026] A crossbeam 104 is installed on the top of the dehydration tank 1, and a first motor 103 is installed on the top of the crossbeam 104. The output shaft of the first motor 103 is connected to a first rotating shaft 105 via a coupling. A thermostat 106 is connected to the outer periphery of the first rotating shaft 105. A third motor 3 is installed at the bottom of the buffer tank 301, and the output shaft of the third motor 3 is connected to a third rotating shaft 303 via a coupling. A transverse scraper 302 is welded to the outer periphery of the third rotating shaft 303. The separated water enters the bottom of the dehydration tank 1 through the holes on the side of the stirring tank 2 and the buffer tank 301 for cooling to prevent high-temperature liquid from flowing out and causing injury to the operator. The third motor 3 is turned on, and the third motor 3 drives the third rotating shaft 303 and the transverse scraper 302 to rotate. The transverse scraper 302 scrapes the liquid at the bottom of the dehydration tank 1 and discharges it from the liquid outlet pipe 102 for collection.

[0027] A cooling pipe 401 is connected to the side of the dehydration tank 1. A cooling box 4 is installed outside the cooling pipe 401. A collection box 5 for collecting tetrahydrofuran is slidably connected to the bottom of the cooling box 4. A support block 501 is slidably installed at the bottom of the collection box 5. Under standard atmospheric pressure, the boiling point of water is 100°C, while the boiling point of tetrahydrofuran is about 66°C. This is because water molecules have strong hydrogen bonds, which require more energy to overcome and change water from a liquid to a gaseous state, meaning a higher temperature is needed. Tetrahydrofuran, on the other hand, has relatively weak intermolecular forces and a relatively low boiling point. When the mixture of the two is heated, the temperature gradually increases. Once the boiling point of tetrahydrofuran is reached, it begins to vaporize into steam. However, since the temperature is still far from the boiling point of water, tetrahydrofuran undergoes a phase change first, turning into steam and escaping from the mixture. The tetrahydrofuran steam enters the cooling pipe 401 through the corrugated plate 107. After passing through the cooling box 4, the tetrahydrofuran gas turns into liquid and enters the collection box 5 for collection. The dehydration tank 1 is connected to an inlet pipe 101 and an outlet pipe 102, through which the tetrahydrofuran mixture is added.

[0028] Working principle

[0029] The dehydration device for tetrahydrofuran production, in use, firstly, the tetrahydrofuran mixed solution is added from the liquid inlet pipe 101, the tetrahydrofuran mixed solution flows into the stirring barrel 2 along the edge of the guide block 203, the second motor 204 is started, the second motor 204 drives the rotation of the second rotating shaft 206 and the paddle 202, the tetrahydrofuran mixed solution is stirred, the fourth motor 307 is started, the fourth motor 307 drives the rotation of the cam 308, the cam 308 moves along the edge of the arc block 309, due to the action of the spring 305 and the moving column 306, the stirring barrel 2 moves in the vertical direction, the tetrahydrofuran mixed solution in the stirring barrel 2 is heated more uniformly, which is beneficial to the separation of the tetrahydrofuran mixed solution, the heating rod 201 heats the tetrahydrofuran mixed solution, when the temperature reaches, the tetrahydrofuran in the tetrahydrofuran mixed solution is separated from water, the tetrahydrofuran becomes tetrahydrofuran vapor, the tetrahydrofuran vapor enters the cooling pipe 401 through the corrugated plate 107, the tetrahydrofuran gas becomes liquid and enters the collecting tank 5 through the action of the cooling box 4, the liquid is collected, the separated water enters the bottom of the dehydration barrel 1 through the hole on the side of the stirring barrel 2 and the buffer tank 301, is cooled, the high-temperature liquid is prevented from flowing out, and the operator is prevented from being hurt, the third motor 3 is started, the third motor 3 drives the rotation of the third rotating shaft 303 and the transverse scraper 302, the transverse scraper 302 stirs the liquid at the bottom of the dehydration barrel 1, and the liquid is discharged from the liquid outlet pipe 102 and collected.

[0030] It should be noted that, in the present document, relational terms such as one and the other and at least one of often are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying that each modified entity or action must be considered apart from the other one or more.

[0031] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments change, modify, replace and vary in many ways without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A dehydration device for tetrahydrofuran production, comprising a dehydration vat (1), characterized in that: The inside of the dehydration barrel (1) is provided with a buffer box (301), the inner bottom wall of the buffer box (301) is provided with a hollow column (304), the inside of the hollow column (304) is provided with a spring (305), one end of the spring (305) away from the bottom of the buffer box (301) is connected with a moving column (306), one end of the moving column (306) away from the spring (305) is welded with a stirring barrel (2), the top of the stirring barrel (2) is connected with a cross rod (205), the side of the cross rod (205) is provided with a second motor (204), the top of the second motor (204) is connected with a guide block (203), the output shaft of the second motor (204) is connected with a second rotating shaft (206) through a shaft coupling, the outer periphery of the second rotating shaft (206) is welded with a plurality of paddles (202) for stirring, one end of the paddle (202) away from the second rotating shaft (206) is provided with a vertical scraper (207), the outer wall of the stirring barrel (2) and the inner wall of the buffer box (301) are provided with a heating rod (201), the side of the stirring barrel (2) and the buffer box (301) is provided with a hole for liquid flow.

2. The dehydration device for tetrahydrofuran production according to claim 1, characterized by: The vertical inner wall of the buffer box (301) is provided with a corrugated plate (107), the inner bottom wall of the buffer box (301) is provided with a fourth motor (307), the output shaft of the fourth motor (307) is connected with a cam (308) through a shaft coupling, the bottom of the stirring barrel (2) is provided with an arc block (309).

3. The dehydration apparatus for tetrahydrofuran production according to claim 2, characterized by: The bottom of the buffer box (301) is provided with a third motor (3), the output shaft of the third motor (3) is connected with a third rotating shaft (303) through a shaft coupling, the outer periphery of the third rotating shaft (303) is welded with a horizontal scraper (302).

4. The dehydration apparatus for tetrahydrofuran production according to claim 1, characterized by: The top of the dehydration barrel (1) is provided with a cross frame (104), the top of the cross frame (104) is provided with a first motor (103).

5. The dehydration apparatus for tetrahydrofuran production according to claim 4, characterized by: The output shaft of the first motor (103) is connected with a first rotating shaft (105) through a shaft coupling, the outer periphery of the first rotating shaft (105) is connected with a constant temperature rod (106).

6. The dehydration apparatus for tetrahydrofuran production according to claim 4, characterized by: The side of the dehydration barrel (1) is connected with a cooling pipe (401), the outside of the cooling pipe (401) is provided with a cooling box (4), the bottom of the cooling box (4) is slidably connected with a collecting box (5) for collecting tetrahydrofuran, the bottom of the collecting box (5) is slidably provided with a supporting block (501).

7. The dehydration apparatus for tetrahydrofuran production according to claim 1, characterized by: The outer periphery of the dehydration barrel (1) is connected with a liquid inlet pipe (101) and a liquid outlet pipe (102).

Images