Ammoximation feeding device in caprolactam production process

Abstract

The utility model relates to a feeding device, belongs to the technical field of caprolactam production, and particularly relates to an ammoximation feeding device in a caprolactam production process, which comprises a mixing tank, a first feeding pipe, a second feeding pipe and a third feeding pipe. The second feeding pipe and the third feeding pipe are fixedly installed on the side wall of the first feeding pipe, feeding valves are installed on the second feeding pipe and the third feeding pipe, a discharging pipe is fixedly installed at the bottom of the mixing tank, a partition plate is fixedly installed in the middle of the interior of the mixing tank, and a stirring mechanism is arranged in the mixing tank; the stirring mechanism comprises a movable sleeve and a transmission sleeve, the movable sleeve is rotationally installed on the upper portion of the interior of the mixing tank, the bottom of the first feeding pipe is located in the movable sleeve, and the transmission sleeve is movably installed on the lower portion of the interior of the movable sleeve; the raw material pre-mixing device achieves the effect of automatically stirring and pre-mixing the raw materials when the raw materials are added.

Description

TECHNICAL FIELD

[0001] The utility model relates to caprolactam production technical field, especially a kind of ammonia oximation feeding device in caprolactam production process. BACKGROUND

[0002] Caprolactam is the important raw material of production nylon-6, and the ammonia oximation reaction in its production process is one of the key steps.

[0003] According to the search of the Chinese patent with the announcement No.CN206381930U, a solution preparation device belongs to the technical field of chemical experiment device, which comprises a solution tank, a liquid inlet pipe and a feeding pipe, one side of the top of the solution tank is provided with a liquid inlet pipe joint, the other side of the top of the solution tank is provided with a feeding pipe joint, one end of the liquid inlet pipe is connected with the solution tank through the liquid inlet pipe joint, the other end of the liquid inlet pipe is connected with a graduated cylinder, one end of the feeding pipe is connected with the solution tank through the feeding pipe joint, the other end of the feeding pipe is connected with a material tank with a metering device, a liquid inlet switch is arranged on the liquid inlet pipe, a feeding switch is arranged on the feeding pipe, and a solution outlet is arranged at the bottom of the solution tank; a heating device is arranged on the inner wall of the solution tank; an ultrasonic device is arranged at the bottom of the solution tank; a gas purging port is arranged on one side of the material tank, and the gas purging port is connected with a gas purging tank through a gas purging pipe. The solution prepared by the device is uniformly mixed and has accurate solution concentration.

[0004] Based on the above search and combining with the prior art, it is found that:

[0005] In the ammonia oximation reaction, cyclohexanone, ammonia and hydrogen peroxide need to be fully mixed to ensure that the reaction proceeds efficiently. The traditional feeding device mainly uses simple pipeline for direct conveying, and the mixing effect is poor, which leads to local high or low concentration of reactants, reduces the reaction efficiency, and may cause side reactions, affecting the product quality. UTILITY MODEL CONTENT

[0006] In order to solve the above technical problems, the utility model provides a kind of ammonia oximation feeding device in caprolactam production process, reaches the effect that can automatically stir and premix raw materials when adding raw materials.

[0007] The technical solution for achieving the purpose of the utility model is as follows: a kind of ammonia oximation feeding device in caprolactam production process, including mixing tank, feeding pipe one, feeding pipe two and feeding pipe three, feeding pipe one is vertically fixed and installed at the top of mixing tank, feeding pipe two and feeding pipe three are all fixedly installed on the side wall of feeding pipe one, feeding valve is installed on feeding pipe two and feeding pipe three, discharge pipe is fixedly installed at the bottom of mixing tank, baffle is fixedly installed at the inside middle position of mixing tank, stirring mechanism is arranged in the inside of mixing tank;

[0008] The stirring mechanism comprises:

[0009] The movable sleeve is rotatably installed above the inside of the mixing tank, and the bottom of the first feeding pipe is located in the inside of the movable sleeve; and the transmission sleeve is movably installed below the inside of the movable sleeve.

[0010] The electric telescopic rod is fixedly installed on the partition plate, the movable rod is fixedly installed on the output end of the electric telescopic rod, the movable rod is located in the inside of the first feeding pipe, and the transmission sleeve is threadedly sleeved on the movable rod, and the movable plate is fixedly installed on the top of the movable rod.

[0011] The torsional spring is movably sleeved on the movable sleeve and connected with the inner wall of the mixing tank, the first stirring rods are fixedly installed on the side wall of the movable sleeve, the ratchet ring is movably installed in the inside of the movable sleeve, and the transmission sleeve is fixedly installed on the ratchet ring.

[0012] In some embodiments, the bottom of the movable rod is fixedly installed with a sealing plate.

[0013] In some embodiments, a plurality of second stirring rods are installed on the first stirring rods.

[0014] In some embodiments, a sealing ring is inlaidly installed on the movable plate.

[0015] In some embodiments, two screens are fixedly installed below the inside of the mixing tank.

[0016] In some embodiments, a heat exchange sleeve is fixedly sleeved on the third feeding pipe, a conveying pipe is fixedly installed on one side of the heat exchange sleeve, a return pipe is installed on the other side of the heat exchange sleeve, and the conveying pipe and the return pipe are in communication with the inside of the third feeding pipe.

[0017] Compared with the prior art, the utility model has the following remarkable advantages:

[0018] The utility model discloses a setting through the stirring mechanism, and the movable plate can seal the inside of feed pipe no. 1, when needing to mix, hydrogen peroxide is limited by movable plate and cannot enter the inside of mixing jar in the inside of feed pipe no. 1, then can start electric telescopic handle, and electric telescopic handle drives movable rod and movable plate and moves down in the inside of feed pipe no. 1, when movable plate leaves the inside of feed pipe no. 1, hydrogen peroxide in the inside of feed pipe no. 1 can enter the inside of mixing jar, and simultaneously open the feed valve on feed pipe no. 2 and feed pipe no. 3, can make cyclohexanone and liquid ammonia enter the inside of feed pipe no. 1 respectively with hydrogen peroxide and enter the inside of mixing jar, and simultaneously because movable rod and transmission sleeve are connected together through thread, when movable rod moves, transmission sleeve will be driven to rotate, and transmission sleeve can drive movable sleeve rotation through ratchet ring, and movable sleeve drives stirring rod no. 1 rotation, when hydrogen peroxide, cyclohexanone and liquid ammonia all enter the inside of mixing jar, can start electric telescopic handle again, and electric telescopic handle will drive movable rod and movable plate and move up, and can drive transmission sleeve rotation simultaneously, and the direction of transmission sleeve rotation is opposite at this time, and then can not drive movable sleeve rotation again through ratchet ring, when movable rod stops moving, movable sleeve will drive torsional spring rotation when rotating before, and torsional spring will release elastic force at this time, and then can drive movable sleeve reverse rotation, and movable sleeve can drive stirring rod no. 1 rotation at this time, and stirring rod no. 1 rotation can stir hydrogen peroxide, cyclohexanone and liquid ammonia in the inside of mixing jar, and stirring can make hydrogen peroxide, cyclohexanone and liquid ammonia mix evenly, and then reach the effect that can automatically stir raw materials and premix when adding raw materials. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model makes further explanation in combination with the drawings and examples:

[0020] Figure 1 It is the main structure schematic diagram provided in an embodiment of the utility model;

[0021] Figure 2 It is the internal structure cross section view provided in an embodiment of the utility model;

[0022] Figure 3 It is the part structure schematic diagram provided in an embodiment of the utility model; Figure 2 The enlarged view of A in the middle;

[0023] Figure 4 It is the part structure schematic diagram provided in an embodiment of the utility model.

[0024] Mark explanation of drawing:

[0025] 1, mixing tank; 2, feed pipe one; 3, feed pipe two; 4, feed pipe three; 5, feed valve; 6, discharge pipe; 7, partition; 8, movable sleeve; 9, transmission sleeve; 10, electric telescopic rod; 11, movable rod; 12, movable plate; 13, torsional spring; 14, stirring rod one; 15, stirring rod two; 16, ratchet ring; 17, sealing plate; 18, sealing ring; 19, screen; 20, heat exchange sleeve; 21, conveying pipe; 22, return pipe. DETAILED DESCRIPTION

[0026] The utility model is below detailed explanation, the technical scheme in the embodiment of the utility model is clearly and completely described, obviously, the described embodiment only is a part embodiment of the utility model, not all embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of the utility model protection.

[0027] The utility model discloses an ammonia oximation feeding device in caprolactam production process, and the technical scheme of the utility model is:

[0028] As Figures 1 to 4 Shown, an ammonia oximation feeding device in caprolactam production process, including mixing tank 1, feed pipe one 2, feed pipe two 3 and feed pipe three 4, mixing tank 1 is hollow cylindrical structure, feed pipe one 2 vertical fixed mounting is installed at the top of mixing tank 1 and with the inside communication of mixing tank 1, feed pipe two 3 and feed pipe three 4 are all tubular structure, feed pipe two 3 and feed pipe three 4 are all fixedly installed on the lateral wall of feed pipe one 2 and with the inside communication of feed pipe one 2, feed pipe two 3 and feed pipe three 4 are all installed with feed valve 5, feed pipe one 2 is connected with the outside hydrogen peroxide storage equipment, feed pipe two 3 is connected with the outside cyclohexanone storage equipment, feed pipe three 4 is connected with the outside liquid ammonia storage equipment, through feed pipe one 2, feed pipe two 3 and feed pipe three 4 respectively hydrogen peroxide, cyclohexanone and liquid ammonia are sent into the inside of mixing tank 1 and mix, then again send into the inside of lower level reaction equipment, the bottom of mixing tank 1 is fixedly installed with discharge pipe 6, and discharge pipe 6 is used to send the mixed solution into the inside of lower level reaction equipment, the inside middle position of mixing tank 1 is fixedly installed with partition 7, and the middle of partition 7 is provided with sector opening, and the inside of mixing tank 1 is provided with stirring mechanism;

[0029] The stirring mechanism comprises a movable sleeve 8, a transmission sleeve 9, an electric telescopic rod 10, a movable rod 11, a movable plate 12, a torsional spring 13, stirring rods 14 and a ratchet ring 16. The movable sleeve 8 is in a hollow cylindrical structure and is rotatably installed above the inside of the mixing tank 1. The bottom of the first feeding pipe 2 is located inside the movable sleeve 8. The transmission sleeve 9 is movably installed below the inside of the movable sleeve 8. The electric telescopic rod 10 is fixedly installed on the partition plate 7. The movable rod 11 is in a cylindrical structure and is fixedly installed on the output end of the electric telescopic rod 10. The movable rod 11 is located inside the first feeding pipe 2. The transmission sleeve 9 is threadedly sleeved on the movable rod 11. The first feeding pipe 2 is a circular plate with the same size as the inside of the first feeding pipe 2. The movable plate 12 is fixedly installed on the top of the movable rod 11. The torsional spring 13 is sleeved on the movable sleeve 8 and connected with the inner wall of the mixing tank 1. The stirring rods 14 are fixedly installed on the side wall of the movable sleeve 8. The ratchet ring 16 is in a circular ring structure and is movably installed inside the movable sleeve 8. The ratchet ring 16 enables the transmission sleeve 9 to only drive the movable sleeve 8 to rotate in one direction. The transmission sleeve 9 is fixedly installed on the ratchet ring 16. Through the arrangement of the stirring mechanism, the movable plate 12 can seal the inside of the first feeding pipe 2. When mixing is needed, the hydrogen peroxide in the first feeding pipe 2 is limited by the movable plate 12 and cannot enter the inside of the mixing tank 1. Then the electric telescopic rod 10 can be started. The electric telescopic rod 10 drives the movable rod 11 and the movable plate 12 to move downward in the first feeding pipe 2. When the movable plate 12 leaves the inside of the first feeding pipe 2, the hydrogen peroxide in the first feeding pipe 2 can enter the inside of the mixing tank 1. At the same time, the feeding valves 5 on the second feeding pipe 3 and the third feeding pipe 4 are opened. The cyclohexanone and the liquid ammonia can enter the inside of the first feeding pipe 2 and enter the inside of the mixing tank 1 together with the hydrogen peroxide. At the same time, since the movable rod 11 and the transmission sleeve 9 are threadedly sleeved together, when the movable rod 11 moves, the transmission sleeve 9 will be driven to rotate. The transmission sleeve 9 can drive the movable sleeve 8 to rotate through the ratchet ring 16. The movable sleeve 8 drives the stirring rods 14 to rotate. When the hydrogen peroxide, the cyclohexanone and the liquid ammonia all enter the inside of the mixing tank 1, the electric telescopic rod 10 can be started again. The electric telescopic rod 10 drives the movable rod 11 and the movable plate 12 to move upward. At the same time, the transmission sleeve 9 can be driven to rotate. At this time, the transmission sleeve 9 rotates in the opposite direction. Therefore, the movable sleeve 8 cannot be driven to rotate again through the ratchet ring 16. When the movable rod 11 stops moving, the movable sleeve 8 drives the torsional spring 13 to rotate when it rotates before. At this time, the torsional spring 13 releases the elastic force. Therefore, the movable sleeve 8 can be driven to rotate in the opposite direction. At this time, the movable sleeve 8 drives the stirring rods 14 to rotate. The stirring rods 14 rotate to stir the hydrogen peroxide, the cyclohexanone and the liquid ammonia in the inside of the mixing tank 1. The stirring can make the hydrogen peroxide, the cyclohexanone and the liquid ammonia uniformly mixed. Therefore, the effect that the raw materials can be automatically stirred and premixed when the raw materials are added is achieved.

[0030] The bottom of the movable rod 11 is fixedly provided with a sealing plate 17, which is a circular plate with the same size as the inside of the partition plate 7. When the movable rod 11 is located in the inside of the first feeding pipe 2, the sealing plate 17 is not in the inside of the partition plate 7, so that the middle of the partition plate 7 is opened. When the movable rod 11 and the movable plate 12 are not in the inside of the first feeding pipe 2, the sealing plate 17 is located in the inside of the partition plate 7 to seal the opening on the partition plate 7, so that the hydrogen peroxide, cyclohexanone and liquid ammonia can be mixed in the inside of the mixing tank 1. After the mixing is completed, the sealing plate 17 can be separated from the inside of the partition plate 7, and the mixed solution can fall to the lower part of the inside of the mixing tank 1 and then be discharged from the inside of the mixing tank 1.

[0031] The stirring rod one 14 is provided with a plurality of stirring rods two 15, which can rotate with the stirring rod one 14 to improve the stirring effect of the solution.

[0032] The movable plate 12 is embedded with a sealing ring 18 made of rubber, which can improve the tightness between the movable plate 12 and the first feeding pipe 2.

[0033] The lower part of the inside of the mixing tank 1 is fixedly provided with two screens 19, which can screen the mixed solution to filter out the impurities in the solution and separate the solution, so that the solution can be mixed again to further improve the mixing effect of the solution.

[0034] The heat exchange sleeve 20 is a hollow cylindrical structure, one side of which is fixedly provided with a conveying pipe 21, and the other side is provided with a return pipe 22. The conveying pipe 21 and the return pipe 22 are in communication with the inside of the third feeding pipe 4. In order to ensure the stability of the liquid ammonia, the liquid ammonia needs to be heated or cooled when it is fed. The conveying pipe 21 can send cold air or hot air into the inside of the heat exchange sleeve 20, so as to heat or cool the liquid ammonia passing through the inside of the third feeding pipe 4, thereby ensuring the stability of the liquid ammonia.

[0035] The specific working method is: through the setting of the stirring mechanism, the movable plate 12 can seal the inside of the feeding pipe one 2, when mixing is needed, the hydrogen peroxide in the inside of the feeding pipe one 2 is limited by the movable plate 12 and cannot enter the inside of the mixing tank 1, then the electric telescopic rod 10 can be started, the electric telescopic rod 10 drives the movable rod 11 and the movable plate 12 to move downwards in the inside of the feeding pipe one 2, when the movable plate 12 leaves the inside of the feeding pipe one 2, the hydrogen peroxide in the inside of the feeding pipe one 2 can enter the inside of the mixing tank 1, at the same time, the feeding valve 5 on the feeding pipe two 3 and the feeding pipe three 4 is opened, so that the cyclohexanone and the liquid ammonia can enter the inside of the feeding pipe one 2 and enter the inside of the mixing tank 1 together with the hydrogen peroxide, at the same time, since the movable rod 11 and the transmission sleeve 9 are screwed together, when the movable rod 11 moves, the transmission sleeve 9 can be driven to rotate, the transmission sleeve 9 can drive the movable sleeve 8 to rotate through the ratchet ring 16, the movable sleeve 8 drives the stirring rod one 14 to rotate, when the hydrogen peroxide, the cyclohexanone and the liquid ammonia enter the inside of the mixing tank 1, the electric telescopic rod 10 can be started again, the electric telescopic rod 10 drives the movable rod 11 and the movable plate 12 to move upwards, at the same time, the transmission sleeve 9 can be driven to rotate, at this time, the transmission sleeve 9 rotates in the opposite direction, so that the movable sleeve 8 cannot be driven to rotate again through the ratchet ring 16, when the movable rod 11 stops moving, the movable sleeve 8 drives the torsional spring 13 to rotate when rotating before, at this time, the torsional spring 13 releases the elastic force, so that the movable sleeve 8 can be driven to rotate in the opposite direction, at this time, the movable sleeve 8 drives the stirring rod one 14 to rotate, the stirring rod one 14 rotates to stir the hydrogen peroxide, the cyclohexanone and the liquid ammonia in the inside of the mixing tank 1, the stirring can make the hydrogen peroxide, the cyclohexanone and the liquid ammonia mix uniformly, so that the effect that the raw materials can be automatically stirred and premixed when the raw materials are added is achieved.

[0036] The technical means disclosed in the utility model scheme is not limited to the technical means disclosed in the above technical means, and also includes technical solutions composed of equivalent replacement of the above technical features. The matters not covered in the utility model belong to the common knowledge of those skilled in the art.

Claims

1. An ammonoximation feeding device in a caprolactam production process, comprising a mixing tank (1), a feeding pipe one (2), a feeding pipe two (3) and a feeding pipe three (4), the feeding pipe one (2) is vertically fixedly installed on the top of the mixing tank (1), the feeding pipe two (3) and the feeding pipe three (4) are both fixedly installed on the side wall of the feeding pipe one (2), and the feeding pipe two (3) and the feeding pipe three (4) are both provided with a feeding valve (5), characterized in that: The bottom of the mixing tank (1) is fixedly provided with a discharge pipe (6), the middle of the inside of the mixing tank (1) is fixedly provided with a partition plate (7), and the inside of the mixing tank (1) is provided with a stirring mechanism; The stirring mechanism comprises: A movable sleeve (8) and a transmission sleeve (9), the movable sleeve (8) is rotatably installed above the inside of the mixing tank (1), the bottom of the first feeding pipe (2) is located in the inside of the movable sleeve (8), and the transmission sleeve (9) is movably installed below the inside of the movable sleeve (8); An electric telescopic rod (10), a movable rod (11) and a movable plate (12), the electric telescopic rod (10) is fixedly installed on the partition plate (7), the movable rod (11) is fixedly installed on the output end of the electric telescopic rod (10), the movable rod (11) is located in the inside of the first feeding pipe (2), the transmission sleeve (9) is threadedly sleeved on the movable rod (11), and the movable plate (12) is fixedly installed on the top of the movable rod (11); A torsional spring (13), a stirring rod (14) and a ratchet ring (16), the torsional spring (13) is movably sleeved on the movable sleeve (8) and connected with the inner wall of the mixing tank (1), the stirring rods (14) are fixedly installed on the side wall of the movable sleeve (8), the ratchet ring (16) is movably installed in the inside of the movable sleeve (8), and the transmission sleeve (9) is fixedly installed on the ratchet ring (16).

2. A device for feeding ammonia oxime into a process for the production of caprolactam according to claim 1, characterized in that: The bottom of the movable rod (11) is fixedly provided with a sealing plate (17).

3. A device for feeding ammonia oxime into a process for the production of caprolactam according to claim 1, characterized in that: A plurality of stirring rods (15) are installed on the stirring rods (14).

4. A device for feeding ammonia oxime into a process for the production of caprolactam according to claim 1, characterized in that: The movable plate (12) is inlaidly provided with a sealing ring (18).

5. A process for the production of caprolactam according to claim 1, characterized in that: Two screen meshes (19) are fixedly installed below the inside of the mixing tank (1).

6. A process for the production of caprolactam according to claim 1, characterized in that: A heat exchange sleeve (20) is fixedly sleeved on the third feeding pipe (4), one side of the heat exchange sleeve (20) is fixedly provided with a conveying pipe (21), the other side of the heat exchange sleeve (20) is provided with a return pipe (22), and the conveying pipe (21) and the return pipe (22) are in communication with the inside of the third feeding pipe (4).

Images