A condensation reactor for the production of methenamine and a method of operation

Abstract

The application belongs to the technical field of biological reaction, and particularly relates to a condensation reactor for producing urotropine and an operating method thereof, which comprises a kettle body, an air inlet valve is arranged at the top end of the kettle body, a liquid outlet valve is arranged at the bottom end of the kettle body, a liquid inlet valve and an air outlet valve are arranged on the outer sidewall of the kettle body, an L-shaped column is arranged at the top end of the kettle body and is fixedly connected with a servo motor, a first rotating shaft is arranged at the output end of the servo motor, the first rotating shaft extends into the kettle body, a stirring assembly is arranged on the outer sidewall of the first rotating shaft, a disc is fixedly connected to the inner wall of the kettle body, the disc is sleeved on the outer sidewall of the first rotating shaft, a bottom cover is rotatably connected to the bottom end of the disc and is sleeved and fixedly connected to the outer sidewall of the first rotating shaft, a spray head is arranged on the bottom cover, a first annular disc is fixedly connected to the outer sidewall of the kettle body close to the bottom end, and the first annular disc is hollow, so as to solve the problems of insufficient free ammonia in the liquid and excessive overall reaction temperature caused by reaction heat release.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of biological reaction, and particularly relates to a condensation reactor for producing urotropine and an operation method. BACKGROUND

[0002] Urotropine, also known as hexamethylenetetramine, is an organic compound with the chemical formula C6H12N4 and a molecular weight of 140.19, which is a white crystalline powder, easily soluble in water, ethanol, chloroform, carbon tetrachloride, and insoluble in diethyl ether, mainly used as an organic synthesis raw material, used in the pharmaceutical industry to produce chloramphenicol, and also used to prepare pesticides and insecticides.

[0003] In the prior art, urotropine is produced by condensation of formaldehyde and ammonia in an alkaline solution, but the production process often has the following problems: 1. In order to ensure the purity of the final product, generally, there needs to be excess free ammonia in the reaction liquid to prevent reverse reaction and the production of trimethylamine, and the excess ammonia gas will be flushed out of the liquid, remaining between the liquid surface and the top of the kettle body, resulting in insufficient free ammonia in the liquid, reverse reaction and the production of trimethylamine; 2. During the reaction process, heat is released, but the reaction itself will heat up, and the heat released by the reaction will cause the temperature to rise, and the high temperature will cause urotropine to form an oily polymer, which will also affect the quality of the final product.

[0004] Therefore, the present application provides a condensation reactor for producing urotropine and an operation method. SUMMARY

[0005] In order to make up for the shortcomings of the prior art, a condensation reactor for producing urotropine and an operation method are provided to solve the problems of insufficient free ammonia in the liquid and excessive overall reaction temperature caused by heat release.

[0006] The technical scheme adopted by the present application to solve its technical problems is: the condensation reactor for producing urotropine comprises a kettle body, an air inlet valve is installed at the top end of the kettle body, a liquid outlet valve is installed at the bottom end of the kettle body, an inlet valve and an air outlet valve are installed on the outer side wall of the kettle body, a servo motor is fixedly connected to the top end of the kettle body through an L-shaped column, a first rotating shaft is installed at the output end of the servo motor, the first rotating shaft extends into the kettle body, a stirring assembly is installed on the outer side wall of the first rotating shaft, a disc is fixedly connected to the inner wall of the kettle body, the disc is sleeved on the first rotating shaft, a bottom cover is rotatably connected to the lower part of the disc, the bottom cover is sleeved and fixedly connected to the outer wall of the first rotating shaft, a spray head is formed in the bottom cover, a first annular disc is fixedly connected to the outer side wall of the kettle body close to the bottom end, the first annular disc is hollow, a water pump is fixedly connected to the bottom end of the kettle body, the inlet end of the water pump is communicated with the kettle body through a pipeline, the outlet of the water pump is communicated with the first annular disc through a pipeline, a group of heat conduction pipes are fixedly connected to the outer wall of the first annular disc through a group of first communication pipes, a second communication pipe is fixedly connected to the outer wall of the heat conduction pipe close to the top end, the second communication pipe extends into the kettle body and communicates with the disc, an electric heating wire is installed on the inner wall of the kettle body, the air inlet valve is connected to the air inlet assembly, and the inlet valve and the air outlet valve are located below the disc.

[0007] Preferably, the stirring assembly comprises an inclined shaft, a group of inclined shafts are rotatably connected to the first rotating shaft, the inclined shafts are arranged in a downward inclined manner, a group of stirring plates are fixedly connected to the inclined shafts, a rotating disc is rotatably connected to the inner wall of the kettle body, the end of the inclined shaft extends into the rotating disc and is fixedly connected to a first gear, an annular inclined gear rack is fixedly connected to the inner wall of the kettle body, and the annular inclined gear rack is located in the rotating disc, the first gear and the annular inclined gear rack are meshed with each other.

[0008] Preferably, the air inlet assembly comprises a second annular disc, a first cavity is formed in the first rotating shaft, a second annular disc is rotatably connected to the outer wall of the first rotating shaft, a communication hole is formed in the inner wall of the first cavity, the first cavity is communicated with the second annular disc through the communication hole, the air inlet valve is communicated with the second annular disc through a third communication pipe, a second cavity is formed in the inclined shaft, the first cavity and the second cavity are communicated with each other, a group of air outlet holes are formed in the outer wall of the inclined shaft, and the second annular disc and the third communication pipe are located above the disc.

[0009] Preferably, the stirring plate is crescent-shaped, the stirring plate is fixedly connected to the inclined shaft at both ends, the middle part of the stirring plate is not in contact with the inclined shaft, and a group of barbs are fixedly connected to the inner wall of the middle part of the stirring plate.

[0010] Preferably, a group of air chambers are arranged in the bottom cover, a group of air holes are arranged at the bottom end of the air chambers, the air chambers and the spray heads are staggered arranged on the bottom cover, a group of second rotating shafts are rotatably connected to the bottom end of the air chambers, the top end of the second rotating shafts extends into the disc and is fixedly connected to a group of second gears, the outer diameter of the second gears gradually decreases from the outer circle of the bottom cover to the center of the bottom cover, the second gears are meshed with each other, a group of fan blades are fixedly connected to the outer wall of the air chambers, an annular gear rack is fixedly connected to the inner wall of the disc, and the outermost second gear in the disc is meshed with the annular gear rack.

[0011] Preferably, a third cavity is arranged at the top end of the heat conduction pipe, a fourth cavity is arranged at the bottom end of the heat conduction pipe, a fifth cavity is arranged in the heat conduction pipe, the first communication pipe is in communication with the fourth cavity, the third cavity and the second communication pipe are in communication with each other, and the third cavity, the fourth cavity and the fifth cavity are in communication with each other.

[0012] Preferably, a cylinder is fixedly connected to the top end of the heat conduction pipe, the bottom end of the piston rod of the cylinder extends into the third cavity and is fixedly connected to a moving plate, the moving plate is slidably connected to the inner wall of the third cavity, a group of sealing blocks are fixedly connected to the bottom end of the moving plate, the sealing blocks are circularly arranged, and the lengths of the sealing blocks gradually decrease.

[0013] Preferably, a group of circular discs are slidably arranged on the outer wall of the heat conduction pipe and slidably arranged in the Mi-shaped groove, the circular discs are connected to each other through arc-shaped rods, and the circular discs move up and down through the power assembly.

[0014] Preferably, the power assembly comprises a reciprocating screw, a pair of symmetrical fixed blocks are fixedly connected to the outer wall of the kettle body, the reciprocating screw is rotatably connected to the fixed blocks, the arc-shaped rods are connected to the reciprocating screw through screw nut pairs, a second sprocket is fixedly connected to the top end of the reciprocating screw, a first sprocket is fixedly connected to the outer wall of the first rotating shaft, the second sprocket and the first sprocket are drivingly connected through a chain, and two pairs of guide columns are fixedly connected to the top end of the kettle body.

[0015] An operating method of a condensation reactor for producing methenamine, which is applicable to the condensation reactor for producing methenamine, comprises the following steps:

[0016] S1: fill the formaldehyde liquid through the liquid inlet valve, fill the ammonia gas into the formaldehyde liquid through the gas inlet assembly of the gas inlet valve, and heat the formaldehyde liquid through the heating wire; at the same time of filling the ammonia gas, start the servo motor to stir the formaldehyde liquid through the stirring assembly, and make the liquid flow circularly through the water pump; after the filling of the ammonia gas is completed, stop the water pump;

[0017] S2: after the heating wire is heated to the reaction temperature, start the water pump again, control the heat dissipation efficiency through the cylinder, and after the reaction is completed, discharge the liquid through the liquid outlet valve and the excess ammonia gas through the gas outlet valve.

[0018] The beneficial effects of the present application are as follows:

[0019] The present application uses external natural wind to dissipate heat through the heat pipe, and simultaneously brings the overflowed free ammonia into the liquid, so that the temperature does not become too high in the subsequent reaction, and the excess free ammonia can be avoided from being located between the liquid surface and the top of the kettle body through the circulating liquid, so as to ensure the reaction quality and efficiency.

[0020] The inclined shaft is arranged downwardly, and when the inclined shaft is stirred, the reaction liquid is rolled up and down and left and right, so that the uniformity of the heat in the reaction liquid and the uniformity of the distribution of the free ammonia are facilitated, and the reaction quality and efficiency are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The present application will be further described below in combination with the drawings.

[0022] Figure 1 is a structural schematic view of the whole of the present application;

[0023] Figure 2 is a side sectional view of the kettle body in the present application;

[0024] Figure 3 is a partial enlarged view of A in the present application; Figure 2

[0025] Figure 4 is a front sectional view of the kettle body in the present application;

[0026] Figure 5 is a partial enlarged view of B in the present application; Figure 4

[0027] Figure 6 is a partial enlarged view of C in the present application; Figure 4

[0028] Figure 7 is an exploded view of the heat pipe in the present application;

[0029] Figure 8 is a structural schematic view of the inclined shaft in the present application;

[0030] Figure 9 is a display view of the disc in the present application.

[0031] ​​​In the figure: 1, kettle body; 11, liquid inlet valve; 12, gas outlet valve; 13, gas inlet valve; 14, servo motor; 15, first rotating shaft; 16, heat conducting pipe; 17, first annular disc; 18, water pump; 2, disc; 21, bottom cover; 22, nozzle; 23, first communication pipe; 24, second communication pipe; 25, inclined shaft; 26, stirring plate; 27, rotating disc; 28, annular inclined rack; 29, first gear; 3, first cavity; 31, second cavity; 32, gas outlet hole; 33, second annular disc; 34, communication hole; 35, third communication pipe; 36, barb; 4, second rotating shaft; 41, second gear; 42, annular rack; 43, fan blade; 44, air hole; 45, air cavity; 5, rice-shaped through slot; 51, third cavity; 52, fourth cavity; 53, fifth cavity; 54, air cylinder; 55, moving plate; 56, sealing block; 6, circular disc; 62, arc-shaped rod; 63, reciprocating screw; 64, fixed block; 65, first sprocket; 66, second sprocket; 67, chain; 68, guide column. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0033] As Figures 1 to 9As shown, the condensation reactor for producing urotropine provided by the embodiment of the present application comprises a kettle body 1, an air inlet valve 13 is installed at the top end of the kettle body 1, a liquid outlet valve is installed at the bottom end of the kettle body 1, a liquid inlet valve 11 and an air outlet valve 12 are installed on the outer wall of the kettle body 1, an L-shaped column is fixedly connected to the top end of the kettle body 1, a servo motor 14 is fixedly connected to the top end of the kettle body 1, a first rotating shaft 15 is installed at the output end of the servo motor 14, the first rotating shaft 15 extends into the kettle body 1, a stirring assembly is installed on the outer side wall of the first rotating shaft 15, a disc 2 is fixedly connected to the inner wall of the kettle body 1, the disc 2 is sleeved on the first rotating shaft 15, a bottom cover 21 is rotatably connected to the lower part of the disc 2, the bottom cover 21 is sleeved and fixedly connected to the outer wall of the first rotating shaft 15, a spray head 22 is formed in the bottom cover 21, a first annular disc 17 is fixedly connected to the outer side wall of the kettle body 1 close to the bottom end, the first annular disc 17 is hollow, a water pump 18 is fixedly connected to the bottom end of the kettle body 1, the inlet end of the water pump 18 is communicated with the kettle body 1 through a pipeline, the outlet end of the water pump 18 is communicated with the first annular disc 17 through a pipeline, a group of heat conducting pipes 16 are fixedly connected to the outer wall of the first annular disc 17 through a group of first communication pipes 23, a second communication pipe 24 is fixedly connected to the outer wall of the heat conducting pipe 16 close to the top end, the second communication pipe 24 extends into the kettle body 1 and is communicated with the disc 2, an electric heating wire is installed on the inner wall of the kettle body 1, the air inlet valve 13 is used for air inlet through an air inlet assembly, the liquid inlet valve 11 and the air outlet valve 12 are located below the disc 2; when working, the formaldehyde liquid is first filled in through the liquid inlet valve 11, the ammonia gas is filled into the formaldehyde liquid through the air inlet assembly of the air inlet valve 13, and heating is performed for reaction, while the ammonia gas is filled in, the servo motor 14 is turned on, the servo motor 14 stirs the formaldehyde liquid through the stirring assembly, meanwhile, the water pump 18 is turned on, the water pump 18 drives the liquid to pass through the first communication pipe 23, the first annular disc 17, the heat conducting pipe 16, the second communication pipe 24 and the disc 2, and is sprayed out from the spray head 22, the bottom cover 21 is fixedly connected to the first rotating shaft 15, the first rotating shaft 15 is rotated to drive the bottom cover 21 to rotate, and then drives the spray head 22 to comprehensively spray, the sprayed liquid can fully contact with the free ammonia between the liquid surface and the top end of the kettle body 1, so that the free ammonia can enter the liquid again with the liquid, after the air filling is completed, the water pump 18 is turned off, and the electric heating wire is heated to the reaction temperature, because the reaction will release heat, the saturated free ammonia in the liquid is overflowed through the stirring assembly, therefore, after being heated to the reaction temperature, the water pump 18 is turned on again, the heat is dissipated through the heat conducting pipe 16 by using the external natural wind, meanwhile, the overflowed free ammonia is brought into the liquid through the circulating liquid, in the subsequent reaction, the temperature is not too high, meanwhile, the excess free ammonia is avoided to be located between the liquid surface and the top end of the kettle body 1, and the reaction quality is ensured.

[0034] The stirring assembly comprises the inclined shaft 25, a group of the inclined shafts 25 are rotationally connected to the first rotating shaft 15, the inclined shaft 25 is arranged downwardly, a group of the stirring plates 26 are fixedly connected to the inclined shaft 25, the rotary disc 27 is rotationally connected to the inner wall of the kettle body 1, the end of the inclined shaft 25 extends into the rotary disc 27 and is fixedly connected with the first gear 29, the annular inclined rack 28 is fixedly connected to the inner wall of the kettle body 1, the annular inclined rack 28 is located in the rotary disc 27, the first gear 29 and the annular inclined rack 28 are meshed with each other; in operation, the first rotating shaft 15 rotates to drive the inclined shaft 25 to rotate, and further drives the rotary disc 27 to rotate, the first gear 29 and the annular inclined rack 28 are meshed with each other, and further drive the inclined shaft 25 to revolve around the first rotating shaft 15 while rotating, since the inclined shaft 25 is arranged downwardly, the reaction liquid is rolled up and down and left and right when the inclined shaft 25 stirs, the uniformity of the heat in the reaction liquid is ensured, the uniform distribution of the free ammonia is ensured, and the reaction efficiency and quality are improved.

[0035] The air inlet assembly comprises the second annular disc 33, the first cavity 3 is formed in the first rotating shaft 15, the second annular disc 33 is rotationally connected to the outer wall of the first rotating shaft 15, the communicating hole 34 is formed in the inner wall of the first cavity 3, the first cavity 3 is communicated with the second annular disc 33 through the communicating hole 34, the air inlet valve 13 is communicated with the second annular disc 33 through the third communicating pipe 35, the second cavity 31 is formed in the inclined shaft 25, the first cavity 3 and the second cavity 31 are communicated with each other, a group of the air outlet holes 32 are formed in the outer wall of the inclined shaft 25, and the second annular disc 33 and the third communicating pipe 35 are located above the disc 2; in operation, the ammonia gas is filled through the air inlet valve 13, at this time, the ammonia gas passes through the air inlet valve 13, the third communicating pipe 35, the second annular disc 33, the communicating hole 34, the first cavity 3 and the second cavity 31, and is sprayed out from the air outlet hole 32, the ammonia gas is quickly filled into the liquid and quickly dissolved in the liquid, the uniformity of the ammonia ion in the reaction liquid is ensured, and the trimethylamine is avoided.

[0036] The stirring plate 26 is crescent-shaped, the two ends of the stirring plate 26 are fixedly connected to the inclined shaft 25, the middle part of the stirring plate 26 is not in contact with the inclined shaft 25, and a group of the barbs 36 are fixedly connected to the inner wall of the middle part of the stirring plate 26; when the ammonia gas is filled, the bubbles are generated and move upwardly, and the bubbles explode on the liquid surface, which causes a large amount of ammonia gas to be retained above the liquid surface, although the circulating liquid can dissolve the ammonia gas between the liquid surface and the top end of the kettle body 1 into the reaction liquid again, the distribution of the ammonia ion in the reaction liquid is not uniform, and the trimethylamine is prone to appear, therefore, the stirring plate 26 is crescent-shaped, the barbs 36 are arranged on the inner wall of the stirring plate 26, the inclined shaft 25 rotates with the first rotating shaft 15, the inclined shaft 25 rotates, the stirring plate 26 rotates with the inclined shaft 25, the barbs 36 first break the bubbles when the bubbles appear, the production of the bubbles is reduced, and the reaction quality is ensured.

[0037] A group of air chambers 45 are arranged in the bottom cover 21, a group of air holes 44 are arranged at the bottom end of the air chambers 45, a group of air chambers 45 and a group of spray heads 22 are staggered on the bottom cover 21, a group of second rotating shafts 4 are rotatably connected to the bottom end of the air chambers 45, the top end of the second rotating shaft 4 extends into the disc 2 and is fixedly connected to a group of second gears 41, the outer diameter of the second gear 41 gradually decreases from the outer circle of the bottom cover 21 to the center of the bottom cover 21, the second gears 41 are meshed with each other, a group of fan blades 43 are fixedly connected to the outer wall of the air chamber 45, an annular gear rack 42 is fixedly connected to the inner wall of the disc 2, the outermost second gear 41 in the disc 2 is meshed with the annular gear rack 42; during operation, the bottom cover 21 rotates with the first rotating shaft 15, because the outermost second gear 41 is meshed with the annular gear rack 42, and the second gears 41 are meshed with each other, when the first rotating shaft 15 rotates, the second rotating shaft 4 rotates, driving the fan blades 43 to rotate, forming downward air force, and the outer diameter of the second gear 41 gradually decreases from the outer circle of the bottom cover 21 to the center of the bottom cover 21, so that the air force is small and slow at the outer periphery and large and fast at the inner periphery, forming an inverted conical air force, which facilitates the pressing of excess ammonia gas into the liquid and the diffusion of the mist liquid to the surrounding, so as to avoid the situation of floating all the time.

[0038] The heat conduction pipe 16 is provided with a rice-shaped groove 5, the top end of the heat conduction pipe 16 is provided with a third cavity 51, the bottom end of the heat conduction pipe 16 is provided with a fourth cavity 52, the heat conduction pipe 16 is provided with a fifth cavity 53, the first communication pipe 23 is communicated with the fourth cavity 52, the third cavity 51 and the second communication pipe 24 are communicated with each other, and the third cavity 51, the fourth cavity 52 and the fifth cavity 53 are communicated with each other; in order to ensure the heat dissipation efficiency, the rice-shaped groove 5 is arranged to increase the contact area between the heat conduction pipe 16 and the air, thereby ensuring the heat dissipation efficiency.

[0039] The top end of the heat conduction pipe 16 is fixedly connected with a gas cylinder 54, the bottom end of the piston rod of the gas cylinder 54 extends into the third cavity 51 and is fixedly connected with a moving plate 55, the moving plate 55 is slidably connected to the inner wall of the third cavity 51, the bottom end of the moving plate 55 is fixedly connected with a sealing block 56 at a position relative to the fifth cavity 53, the sealing block 56 is circularly distributed and gradually decreases in length; during operation, the reaction time is long, the reaction degree is changed according to the actual operation, and the heat release is also changing, when the heat release is not intense, the moving plate 55 is driven downward by the gas cylinder 54, the long sealing block 56 seals the relative position of the fifth cavity 53, thereby increasing the flow speed of the liquid in the heat conduction pipe 16 and reducing the contact area between the heat conduction pipe 16 and the air, thereby reducing the heat dissipation effect; the lower the moving plate 55 is, the more the fifth cavities 53 are sealed, and the lower the heat dissipation efficiency is, therefore, the heat release intensity is adjusted to adjust the heat dissipation efficiency, thereby ensuring the reaction quality and efficiency.

[0040] A group of circular discs 6 are sleeved on the outer wall of the heat conducting pipe 16, the circular discs 6 are slidingly connected in the Mi-shaped through slot 5, the circular discs 6 are connected with each other through the arc-shaped rods 62, and the circular discs 6 move up and down through the power assembly; during work, the circular discs 6 clean the heat conducting pipe 16, so that a large amount of impurities and dust adhered to the surface of the heat conducting pipe 16 exposed to the air is removed, the circular discs 6 move up and down to clean the surface of the heat conducting pipe 16, and the heat conducting efficiency of the heat conducting pipe 16 is ensured.

[0041] The power assembly comprises a reciprocating screw rod 63, a pair of symmetrical fixed blocks 64 are fixedly connected to the outer wall of the kettle body 1, the reciprocating screw rod 63 is rotatably connected to the fixed blocks 64, the arc-shaped rods 62 are connected to the reciprocating screw rod 63 through screw nut pairs, the second sprocket 66 is fixedly connected to the top end of the reciprocating screw rod 63, the first sprocket 65 is fixedly connected to the outer wall of the first rotating shaft 15, the second sprocket 66 and the first sprocket 65 are drivingly connected through the chain 67, and two pairs of guide columns 68 are fixedly connected to the top end of the kettle body 1; during work, the first rotating shaft 15 rotates, drives the reciprocating screw rod 63 to rotate through the second sprocket 66, the first sprocket 65 and the chain 67, and then drives the arc-shaped rods 62 and the circular discs 6 to move up and down, so that the circular discs 6 are circularly cleaned up and down, and the guide columns 68 ensure that the covering degree of the chain 67 and the first sprocket 65 is above 60°.

[0042] Working principle:

[0043] First, the formaldehyde liquid is filled through the inlet valve 11, and the ammonia gas is filled into the formaldehyde liquid through the inlet assembly of the inlet valve 13, and the heating reaction is carried out. At the same time of filling the ammonia gas, the servo motor 14 is opened, the servo motor 14 stirs the formaldehyde liquid through the stirring assembly, and at the same time, the water pump 18 is opened, the water pump 18 drives the liquid to pass through the first communication pipe 23, the first annular disc 17, the heat pipe 16, the second communication pipe 24 and the disc 2, and is sprayed from the spray head 22. The first rotating shaft 15 rotates to drive the bottom cover 21 to rotate, and then drives the spray head 22 to spray comprehensively. The sprayed liquid contacts with the free ammonia between the liquid surface and the top of the kettle body 1, and the free ammonia enters the liquid again to ensure the sufficiency of the free ammonia in the liquid. After the gas filling is completed, the water pump 18 is closed, and after the heating wire is heated to the reaction temperature, the water pump 18 is opened again. The heat pipe 16 uses the external natural wind for heat dissipation, so that the temperature does not become too high, and at the same time, the liquid circulation avoids the excessive free ammonia between the liquid surface and the top of the kettle body 1, so as to ensure the reaction quality. The first rotating shaft 15 rotates to drive the inclined shaft 25 to rotate, and then drives the rotating disc 27 to rotate. Because the first gear 29 and the annular inclined rack 28 are engaged with each other, the inclined shaft 25 revolves around the first rotating shaft 15 while rotating. Because the inclined shaft 25 is inclined downward, when the inclined shaft 25 stirs, the reaction liquid rolls up and down and left and right, so as to facilitate the uniformity of the heat in the reaction liquid and the uniformity of the distribution of the free ammonia, and further improve the reaction efficiency. When the ammonia gas is filled, the inclined shaft 25 rotates with the first rotating shaft 15, the inclined shaft 25 rotates, and then the stirring plate 26 rotates with the inclined shaft 25. When the bubbles appear, the barbs 36 can break the bubbles in the first time to reduce the production of bubbles, so as to ensure the reaction quality and efficiency. The lengths of the sealing blocks 56 are reduced in turn. When the heat release is not intense, the moving plate 55 is driven downward by the air cylinder 54. The long sealing block 56 seals the fifth cavity 53 in the relative position to increase the flow speed of the liquid in the heat pipe 16 and reduce the contact area between the heat pipe 16 and the air, so as to reduce the heat dissipation effect. The lower the moving plate 55 descends, the more the sealed fifth cavities 53, and the lower the heat dissipation efficiency. Therefore, the heat dissipation efficiency is adjusted in turn according to the intensity of the heat release, so as to improve the reaction quality and efficiency.

[0044] An operating method of a condensation reactor for producing methenamine, which is suitable for the condensation reactor for producing methenamine described above, and the method steps are as follows:

[0045] S1: The formaldehyde liquid is filled through the inlet valve 11, the ammonia gas is filled into the formaldehyde liquid through the inlet assembly of the inlet valve 13, the heating wire is heated to carry out the reaction, and at the same time of filling the ammonia gas, the servo motor 14 is opened. The servo motor 14 drives the formaldehyde liquid to stir through the stirring assembly, and at the same time, the water pump 18 drives the liquid to flow circularly. After the ammonia gas is filled, the water pump 18 is closed.

[0046] S2: after the heating wire is heated to the reaction temperature, the water pump 18 is started again, the air cylinder 54 is operated and the heat dissipation efficiency is regulated, after the reaction is completed, the liquid is discharged through the liquid outlet valve, and at the same time, the gas outlet valve 12 is opened to discharge the excess ammonia gas.

[0047] The above-mentioned front, rear, left, right, top, bottom are based on the drawings in the specification Figure 1 For the standard of the human observation angle, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0049] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A condensation reactor for the production of methenamine, characterized in that: The utility model provides a kind of double-layered stirring kettle, including cauldron body (1), cauldron body (1) top end is equipped with inlet valve (13), cauldron body (1) bottom end is equipped with liquid outlet valve, cauldron body (1) outer wall is equipped with liquid inlet valve (11) and outlet valve (12), cauldron body (1) top end is fixedly connected with servo motor (14) by L-shaped column, the output of servo motor (14) is equipped with first rotating shaft (15), first rotating shaft (15) extends into cauldron body (1), first rotating shaft (15) outer wall is equipped with stirring subassembly, cauldron body (1) inner wall upper portion is fixedly connected with disc (2), disc (2) is sleeved on first rotating shaft (15), disc (2) lower portion is rotatably connected with bottom cover (21), bottom cover (21) is sleeved and fixedly connected on the outer wall of first rotating shaft (15), bottom cover (21) is equipped with shower nozzle (22), cauldron body (1) is fixedly connected with first annular disc (17) on the outer side wall close to bottom end, first annular disc (17) is hollow in the inside, cauldron body (1) bottom end is fixedly connected with water pump (18), the liquid inlet end of water pump (18) is communicated with cauldron body (1) by pipeline, the liquid outlet of water pump (18) is communicated with first annular disc (17) by pipeline, first annular disc (17) outer wall is fixedly connected with a group of heat pipes (16) by a group of first communication pipes (23), heat pipe (16) is fixedly connected with second communication pipe (24) on the outer wall close to top end, second communication pipe (24) extends into cauldron body (1) and is communicated with disc (2), cauldron body (1) inner wall is equipped with electric heating wire, inlet valve (13) is inhaled by inlet valve group, liquid inlet valve (11) and outlet valve (12) are located below disc (2); Bottom cover (21) is equipped with a group of air cavity (45) in, air cavity (45) bottom end is equipped with a group of air hole (44), a group of air cavity (45) and a group of shower nozzle (22) are staggered distribution on bottom cover (21), air cavity (45) bottom end rotatably connected with a group of second rotating shaft (4), second rotating shaft (4) top end extends into disc (2) and is fixedly connected with a group of second gear (41), the outer diameter of a group of second gear (41) is successively shorter from the outer circle of bottom cover (21) to the center of bottom cover (21), a group of second gear (41) are engaged, second rotating shaft (4) is fixedly connected with a group of fan blade (43) on the outer wall of air cavity (45), disc (2) inner wall is fixedly connected with annular rack (42), disc (2) in and the outermost second gear (41) and annular rack (42) are engaged.

2. A condensation reactor for the production of urotropine according to claim 1, characterized in that Stirring subassembly includes inclined shaft (25), first rotating shaft (15) rotatably connected with a group of inclined shaft (25), inclined shaft (25) is arranged downwardly, a group of stirring plate (26) is fixedly connected on inclined shaft (25), the inner wall of cauldron body (1) is rotatably connected with rotating disc (27), the end of inclined shaft (25) extends into rotating disc (27) and is fixedly connected with first gear (29), the inner wall of cauldron body (1) is fixedly connected with annular inclined rack (28), annular inclined rack (28) is located in rotating disc (27), first gear (29) and annular inclined rack (28) are engaged.

3. A condensation reactor for the production of urotropine according to claim 2, characterized in that The air intake assembly comprises a second annular disk (33), a first cavity (3) is provided in the first rotating shaft (15), the second annular disk (33) is rotatably connected to the outer wall of the first rotating shaft (15), a connecting hole (34) is provided on the inner wall of the first cavity (3), the first cavity (3) is communicated with the second annular disk (33) through the connecting hole (34), the air intake valve (13) is communicated with the second annular disk (33) through the third connecting pipe (35), a second cavity (31) is provided in the inclined shaft (25), the first cavity (3) and the second cavity (31) are communicated with each other, a group of air outlet holes (32) is provided on the outer wall of the inclined shaft (25), and the second annular disk (33) and the third connecting pipe (35) are located above the disc (2).

4. A condensation reactor for the production of methenamine according to claim 3, characterized in that: The stirring plate (26) is crescent-shaped, and both ends of the stirring plate (26) are fixedly connected to the inclined shaft (25). The middle of the stirring plate (26) and the inclined shaft (25) do not contact each other. A group of barbs (36) are fixedly connected to the inner wall of the middle of the stirring plate (26).

5. A condensation reactor for the production of methenamine according to claim 4, characterized in that: A pounding groove (5) is provided in the heat conducting pipe (16), a third cavity (51) is provided at the top end of the heat conducting pipe (16), a fourth cavity (52) is provided at the bottom end of the heat conducting pipe (16), a fifth cavity (53) is provided in the heat conducting pipe (16), the first connecting pipe (23) is connected to the fourth cavity (52), the third cavity (51) and the second connecting pipe (24) are connected to each other, and the third cavity (51), the fourth cavity (52) and the fifth cavity (53) are connected to each other.

6. A condensation reactor for the production of urotropine according to claim 5, characterized in that The top end of the heat conducting pipe (16) is fixedly connected to a cylinder (54), the bottom end of the piston rod of the cylinder (54) extends into the third cavity (51) and is fixedly connected to a movable plate (55), the movable plate (55) is connected to the inner wall of the third cavity (51) in an up-and-down sliding manner, and the bottom end of the movable plate (55) is fixedly connected to a group of sealing blocks (56), the group of sealing blocks (56) are distributed in a circular shape, and the lengths of the sealing blocks (56) are successively shortened.

7. A condensation reactor for the production of urotropine according to claim 6, characterized in that A group of circular disks (6) are slidingly sleeved on the outer wall of the heat conducting pipe (16), and the circular disks (6) are slidingly connected in the mitre groove (5). The group of circular disks (6) are connected to each other through an arc rod (62), and the circular disks (6) move up and down through a power assembly.

8. A condensation reactor for the production of urotropine according to claim 7, characterized in that The power assembly includes a reciprocating screw (63), a pair of symmetrically distributed fixed blocks (64) are fixedly connected to the outer wall of the kettle body (1), the reciprocating screw (63) is rotatably connected to the fixed block (64), the arc rod (62) is connected to the reciprocating screw (63) through a screw nut pair, the top of the reciprocating screw (63) is fixedly connected to a second sprocket (66), the outer wall of the first rotating shaft (15) is fixedly connected to a first sprocket (65), the second sprocket (66) and the first sprocket (65) are connected to each other by a chain (67), and the top of the kettle body (1) is fixedly connected to two pairs of guide columns (68).

9. A method of operating a condensation reactor for the production of methenamine, which is suitable for use in a condensation reactor for the production of methenamine as claimed in claim 8, characterized in that: The method comprises the following steps: S1: through the liquid valve (11) to fill formaldehyde liquid, ammonia through the gas valve (13) of gas assembly to fill into the formaldehyde liquid, heating wire heating reaction, at the same time to fill in ammonia, open servo motor (14), servo motor (14) through the stirring assembly to drive the formaldehyde liquid to stir, at the same time, the water pump (18) makes the liquid circulation flow, after filling in ammonia, close the water pump (18); S2: heating wire heating to reaction temperature, start the water pump (18) again, through the air cylinder (54) operation and control the heat dissipation efficiency, after the reaction, the liquid is discharged through the liquid valve, at the same time, open the gas valve (12), let the excess ammonia gas exhaust.

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