A large horizontal NMP enhanced reactor

Abstract

The invention discloses a horizontal large-scale NMP enhanced reactor, belongs to the field of NMP reactors, comprises a protective outer cylinder and a reaction inner cylinder, both ends of the protective outer cylinder are connected with an outer shell, both ends of the reaction inner cylinder are connected with an inner shell, two feed hoppers are arranged on the outer wall of one side outer shell, the side wall of the feed hopper is connected with the inner shell through a feed pipe, a plurality of initial preheating rings are sleeved on the outer wall of the feed pipe, and a pressurized air bag is arranged between the outer shell and the inner shell on one side. The present invention can facilitate the direct mutual reaction of raw materials after entering the reaction inner cylinder through the arrangement of a mixing plate and a preheating assembly, avoid the occurrence of side reactions in the process of gradually heating from a low temperature to a reaction temperature after the two raw materials are mixed, and at the same time, the arrangement of a detection box and a cut-off assembly can perform random inspections on the liquid of the delivery pipe to understand whether the reaction is complete, facilitate the adjustment of reaction conditions and reaction time, and quickly cut off the flow when leaking, to prevent the liquid remaining in the delivery pipe from continuously leaking.

Description

Technical Field

[0001] The invention relates to the technical field of NMP reactors, in particular to a horizontal large-scale NMP enhanced reactor. Background Art

[0002] NMP is N-methylpyrrolidone, which is an organic substance, a colorless to light yellow transparent liquid with a slight ammonia smell. It is miscible with water in any proportion and soluble in ether, acetone, esters, halogenated hydrocarbons, aromatic hydrocarbons and other organic solvents.

[0003] The production of NMP is generally generated by the amination reaction of γ-butyrolactone and methylamine. The reaction process needs to be carried out under high temperature and high pressure conditions. In the process of heating the γ-butyrolactone and methylamine to the reaction temperature after mixing, some side reactions will occur between the two, which reduces the output rate of NMP. At the same time, NMP is a toxic solvent, so it is generally directly transported to a storage container for storage after sealed production. This makes it impossible for operators to know in time whether there are still raw materials remaining in the solvent after production, and it is impossible to know the output rate of NMP in real time, which is easy to cause waste of raw materials and economic losses. Therefore, a horizontal large-scale NMP enhanced reactor is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that in the prior art, after sealed production, the solvent is generally directly transported to a storage container for storage, which makes it impossible for operators to know in time whether there are residual raw materials in the solvent after production, which easily causes waste of raw materials and economic losses, and a horizontal large-scale NMP enhanced reactor is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A horizontal large-scale NMP enhanced reactor comprises a protective outer cylinder and a reaction inner cylinder, both ends of the protective outer cylinder are connected to an outer shell, both ends of the reaction inner cylinder are connected to an inner shell, two feeding hoppers are arranged on the outer wall of the outer shell on one side, the side wall of the feeding hopper is connected to the inner shell through a feeding pipe, a plurality of initial preheating rings are sleeved on the outer wall of the feeding pipe, a pressurized air bag is arranged between the outer shell and the inner shell on one side, a control motor is fixedly connected to the upper side of the outer wall of the protective outer cylinder through a mounting plate, an output end of the control motor is connected to a gear assembly through a driving shaft, the gear assembly is connected to a mixing shaft, the end of the mixing shaft is connected to a mixing plate, and the mixing A spiral conveying blade is connected to the outer wall of the combined shaft, a preheating component is arranged outside the spiral conveying blade, a pump body is fixedly connected to the lower outer wall of the outer casing on the other side, the conveying end of the pump body is fixedly connected to the conveying pipe through a conduit, the outer wall of the conveying pipe is fixedly connected to the detection motor through a fixing plate, the output end of the detection motor is connected to the driving component through a rotating shaft, the driving component is connected to an intermittent ring, the outer wall of the intermittent ring is connected to an outer fixed ring through an intermittent pipe, the side wall of the outer fixed ring is connected to a detection box through a through pipe, a buoy is arranged in the detection box, the top of the buoy is connected to an alarm component through a push rod, and the inner wall of the end of the conveying pipe is connected to a flow cut-off component.

[0007] Preferably, the inner wall of the protective outer cylinder is fixedly connected to the outer wall of the reaction inner cylinder through a heating mesh, the end face of the protective outer cylinder is fixedly connected to the end face of the outer shell, the end face of the reaction inner cylinder is fixedly connected to the end face of the inner shell, two seat plates are fixedly connected below the outer wall of the protective outer cylinder, and a mixing coil is arranged in the reaction inner cylinder.

[0008] Preferably, the outer side wall of the pressurized airbag is fixedly connected to the inner side wall of the outer shell, the side wall of the pressurized airbag is fixedly connected to the side wall of the hopper via an air pipe, and the hopper is fixedly connected to the outer side wall of the outer shell via a feed pipe.

[0009] Preferably, the gear assembly consists of a main gear and a secondary gear ring, the main gear is meshed with the secondary gear ring, the output end of the control motor is fixedly connected to the side wall of the main gear through a drive shaft, and the inner side wall of the secondary gear ring is fixedly connected to the outer side wall of the mixing shaft through a plurality of connecting rods.

[0010] Preferably, the end of the mixing shaft is fixedly connected to the end surface of the mixing plate, both side walls of the mixing plate are provided with conveying grooves, and the outer side wall of the mixing shaft is fixedly connected to the inner side wall of the spiral conveying blade.

[0011] Preferably, the preheating assembly consists of a preheating ring and multiple compound preheating rings, the inner wall of the compound preheating ring is fixedly connected to the outer wall of the preheating ring, the inner wall of the preheating ring is rotatably connected to the side wall of the spiral conveying blade, and the outer walls at both ends of the preheating ring are fixedly connected to the inner wall of the inner shell.

[0012] Preferably, the driving assembly consists of a driving gear and a driven gear ring, the output end of the detection motor is fixedly connected to the side wall of the driving gear through a rotating shaft, the driving gear is meshed with the driven gear ring, the side wall of the driven gear ring is fixedly connected to the end face of the intermittent ring, and the outer wall of the intermittent ring is rotatably connected to the inner wall of the outer solid ring through an intermittent tube.

[0013] Preferably, the alarm assembly consists of an elastic plate and a docking plate, a return spring is sleeved on the outer side wall of the push rod, an alarm is fixedly connected to the top of the docking plate, the bottom end of the push rod is fixedly connected to the top of the buoy, and water is set in the detection box.

[0014] Preferably, the flow cut-off assembly consists of a flow cut-off bucket and a flow cut-off plug, the outer wall of the flow cut-off bucket is fixedly connected to the inner wall of the conveying pipe, the side wall of the flow cut-off plug is fixedly connected to a orifice plate via a compression spring, the side wall of the orifice plate is fixedly connected to the inner wall of the conveying pipe, and the diameter of the flow cut-off plug is slightly larger than the inner diameter of the small mouth end of the flow cut-off bucket.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This scheme can use the pressurized air bag to pressurize the hopper through the setting of the initial preheating ring and the pressurized air bag, so that the two raw materials can enter the inner shell simultaneously in the proportion required for the reaction, and complete the initial separate preheating during the transportation process, so that the raw materials can be subsequently mixed at a certain initial temperature.

[0017] 2. This solution can use a composite preheating ring to preheat the production raw materials during the transportation process through the setting of the mixing plate and the preheating component, so that the raw materials can directly react with each other after entering the reaction inner cylinder, avoiding side reactions in the process of gradually heating the two raw materials from low temperature to the reaction temperature after mixing, thereby improving the output rate of NMP.

[0018] 3. Through the setting of the detection box and the cut-off assembly, the intermittent ring can be used to drive the intermittent tube to rotate in the outer solid ring, so that the intermittent tube and the through hole on the delivery tube can be intermittently connected to extract liquid, which is convenient for random inspection of the liquid in the delivery tube to understand whether the reaction is complete, and to adjust the reaction conditions and reaction time. In addition, the flow can be quickly cut off in case of leakage to prevent the residual liquid in the delivery tube from continuing to leak. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the three-dimensional structure of a horizontal large-scale NMP enhanced reactor proposed by the present invention Figure 1 ;

[0020] Figure 2 Schematic diagram of the three-dimensional structure of a horizontal large-scale NMP enhanced reactor proposed by the present invention Figure 2 ;

[0021] Figure 3 It is an assembly diagram of a horizontal large-scale NMP enhanced reactor proposed by the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of a heating mesh in a horizontal large-scale NMP enhanced reactor proposed by the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of a preheating component in a horizontal large-scale NMP enhanced reactor proposed by the present invention;

[0024] Figure 6 This is a structural schematic diagram of the pump body position in a horizontal large-scale NMP enhanced reactor proposed by the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the connection between the intermittent ring and the intermittent tube in a horizontal large-scale NMP enhanced reactor proposed by the present invention;

[0026] Figure 8 A schematic diagram of the structure of an alarm assembly in a horizontal large-scale NMP enhanced reactor proposed by the present invention;

[0027] Fig. 9 The present invention provides a schematic structural diagram of the positions of the interruption flow bucket and the interruption flow plug of a horizontal large-scale NMP enhanced reactor.

[0028] In the figure: 1, protective outer cylinder; 2, reaction inner cylinder; 3, seat plate; 4, outer shell; 5, feed hopper; 6, feed pipe; 7, primary preheating ring; 8, air pipe; 9, pressurized air bag; 10, inner shell; 11, control motor; 12, main gear; 13, auxiliary gear ring; 14, mixing shaft; 15, mixing plate; 16, spiral conveying blade; 17, mixing coil; 18, preheating sleeve ring; 19, secondary preheating ring; 20, Heating mesh; 21. Pump body; 22. Delivery pipe; 23. Detection motor; 24. Driving gear; 25. Driven gear ring; 26. Intermittent ring; 27. Intermittent pipe; 28. External fixed ring; 29. ​​Detection box; 30. Floating bucket; 31. Push rod; 32. Reset spring; 33. Elastic plate; 34. Docking plate; 35. Alarm; 36. Cut-off bucket; 37. Cut-off plug; 38. Compression spring; 39. Orifice plate. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Embodiment 1, refer to Figures 1 to 9 A horizontal large-scale NMP enhanced reactor comprises a protective outer cylinder 1 and a reaction inner cylinder 2, both ends of the protective outer cylinder 1 are connected to an outer shell 4, both ends of the reaction inner cylinder 2 are connected to an inner shell 10, two feed hoppers 5 are arranged on the outer wall of one side of the outer shell 4, the side wall of the feed hopper 5 is connected to the inner shell 10 through a feed pipe 6, a plurality of initial preheating rings 7 are sleeved on the outer wall of the feed pipe 6, a pressurized air bag 9 is arranged between the outer shell 4 and the inner shell 10 on one side, and a mixing coil 17 is arranged in the reaction inner cylinder 2;

[0031] Further, the inner wall of the protective outer cylinder 1 is fixedly connected to the outer wall of the reaction inner cylinder 2 through the heating mesh 20, the end face of the protective outer cylinder 1 is fixedly connected to the end face of the outer shell 4, the end face of the reaction inner cylinder 2 is fixedly connected to the end face of the inner shell 10, two seat plates 3 are fixedly connected below the outer wall of the protective outer cylinder 1, the outer wall of the pressurized airbag 9 is fixedly connected to the inner wall of the outer shell 4, the side wall of the pressurized airbag 9 is fixedly connected to the side wall of the feed hopper 5 through the air pipe 8, and the feed hopper 5 is fixedly connected to the outer wall of the outer shell 4 through the feed pipe 6;

[0032] It should be noted that: the two raw materials for producing NMP are introduced from the two feed hoppers 5 on one side of the outer shell 4. After the raw materials enter the feed hopper 5, they will be temporarily stored. The two pressurized air bags 9 in the outer shell 4 will pressurize the feed hoppers 5 on both sides through the two air pipes 8. After the pressurization is completed, the gas in the pressurized air bags 9 will gradually recover by continuously feeding (the feed hopper 5 is in a sealed connection with the outside), so that the raw materials in the two feed hoppers 5 can enter the inner shell 10 on one side according to a preset ratio, and the initial preheating ring 7 on the outer wall of the feed pipe 6 will perform separate initial preheating on the transported raw materials respectively;

[0033] The further advantage of adopting the above method is that the two raw materials can be simultaneously introduced into the inner casing 10 in the ratio required for the reaction, and the initial separate preheating is completed during the conveying process, so that the raw materials can be subsequently mixed at a certain initial temperature.

[0034] Example 2, reference Figure 1-9 A control motor 11 is fixedly connected to the upper side of the outer wall of the protective outer cylinder 1 through a mounting plate, an output end of the control motor 11 is connected to a gear assembly through a driving shaft, a mixing shaft 14 is connected to the gear assembly, a mixing plate 15 is connected to the end of the mixing shaft 14, a spiral conveying blade 16 is connected to the outer side wall of the mixing shaft 14, and a preheating assembly is arranged outside the spiral conveying blade 16;

[0035] Further, the gear assembly is composed of a main gear 12 and a secondary gear ring 13, the main gear 12 is meshed with the secondary gear ring 13, the output end of the control motor 11 is fixedly connected to the side wall of the main gear 12 through the drive shaft, the inner wall of the secondary gear ring 13 is fixedly connected to the outer wall of the mixing shaft 14 through a plurality of connecting rods, the end of the mixing shaft 14 is fixedly connected to the end face of the mixing plate 15, both side walls of the mixing plate 15 are provided with conveying grooves, the outer wall of the mixing shaft 14 is fixedly connected to the inner wall of the spiral conveying blade 16, the preheating assembly is composed of a preheating ring 18 and a plurality of composite preheating rings 19, the inner wall of the composite preheating ring 19 is fixedly connected to the outer wall of the preheating ring 18, the inner wall of the preheating ring 18 is rotatably connected to the side wall of the spiral conveying blade 16, and the outer walls at both ends of the preheating ring 18 are fixedly connected to the inner wall of the inner casing 10;

[0036] It should be noted that: the start control motor 11 uses the drive shaft to drive the main gear 12 to rotate. The rotation of the main gear 12 will drive the meshing auxiliary gear ring 13 below to rotate together. The rotation of the auxiliary gear ring 13 drives the mixing shaft 14 to rotate. The mixing shaft 14 will respectively drive the mixing plate 15, the spiral conveying blade 16 and the mixing coil 17 to rotate together. The rotation of the mixing plate 15 in the inner shell 10 on one side will respectively drive the liquid raw materials input by the feed pipes 6 on both sides to move. The rotation frequency of the mixing plate 15 is synchronized with the pressure frequency of the pressurized airbag 9. Subsequently, the liquid raw material will move to the end of the mixing plate 15 under the action of the rotating centrifugal force and enter through the conveying trough. The preheating ring 18 is matched with the spiral conveying blade 16 to prevent the liquid from directly entering the reaction inner tube 2 without preheating. The liquid raw material is transported into the reaction inner tube 2 under the action of the spiral conveying blade 16. The composite preheating ring 19 on the outer wall of the preheating ring 18 will further preheat the raw material. The temperature during this preheating process is lower than the gasification temperature of methylamine. After entering the reaction inner tube 2, the mixing coil 17 allows the two raw materials to be mixed more quickly and evenly. The heating mesh 20 on the outer wall of the reaction inner tube 2 keeps the interior at the reaction temperature, which is convenient for the raw material to react directly after entering;

[0037] A further advantage of adopting the above method is that it can facilitate the raw materials to react directly with each other after entering the reaction inner cylinder 2, avoiding side reactions in the process of gradually heating the two raw materials from low temperature to the reaction temperature after mixing, thereby improving the output rate of NMP.

[0038] Example 3, reference Figure 1-9A pump body 21 is fixedly connected to the lower side of the outer wall of the outer shell 4 on the other side, and a delivery end of the pump body 21 is fixedly connected to a delivery pipe 22 through a conduit, and the outer wall of the delivery pipe 22 is fixedly connected to a detection motor 23 through a fixing plate, and the output end of the detection motor 23 is connected to a driving component through a rotating shaft, and the driving component is connected to an intermittent ring 26, and the outer wall of the intermittent ring 26 is connected to an outer fixed ring 28 through an intermittent pipe 27, and the side wall of the outer fixed ring 28 is connected to a detection box 29 through a through pipe, and a floating bucket 30 is arranged in the detection box 29, and the top of the floating bucket 30 is connected to an alarm component through a push rod 31, and the inner wall of the end of the delivery pipe 22 is connected to a flow cut-off component;

[0039] Furthermore, the driving assembly is composed of a driving gear 24 and a driven gear ring 25. The output end of the detection motor 23 is fixedly connected to the side wall of the driving gear 24 through a rotating shaft. The driving gear 24 is meshed with the driven gear ring 25. The side wall of the driven gear ring 25 is fixedly connected to the end face of the intermittent ring 26. The outer wall of the intermittent ring 26 is rotatably connected to the inner wall of the outer fixed ring 28 through an intermittent tube 27. The alarm assembly is composed of an elastic plate 33 and a docking plate 34. A reset spring 33 is sleeved on the outer wall of the push rod 31. 2. The top of the docking plate 34 is fixedly connected with an alarm 35, the bottom of the push rod 31 is fixedly connected with the top of the floating bucket 30, water is set in the detection box 29, and the flow cut-off assembly is composed of a flow cut-off bucket 36 and a flow cut-off plug 37. The outer wall of the flow cut-off bucket 36 is fixedly connected with the inner wall of the delivery pipe 22, and the side wall of the flow cut-off plug 37 is fixedly connected with a hole plate 39 through a compression spring 38. The side wall of the orifice plate 39 is fixedly connected with the inner wall of the delivery pipe 22, and the diameter of the flow cut-off plug 37 is slightly larger than the inner diameter of the small mouth end of the flow cut-off bucket 36;

[0040] It should be noted that: after the reaction is completed, the pump body 21 is started to introduce the liquid generated by the reaction into the delivery pipe 22. When it is necessary to conduct a random inspection on the raw material generation, the detection motor 23 is started to drive the driving gear 24 to rotate slowly through the reducer and the rotating shaft, and the driving gear 24 will drive the meshing driven gear ring 25 to rotate, and the rotation of the driven gear ring 25 will drive the intermittent ring 26 to rotate together, and the rotation of the intermittent ring 26 will drive the intermittent tube 27 to rotate in the outer solid ring 28. When the intermittent tube 27 is docked with the through hole on the delivery pipe 22, part of the liquid will be extracted into the intermittent tube 27. The intermittent tube 27 continues to rotate and the extracted liquid will be transported to the detection box 29 through the through pipe. The water in the detection box 29 is kept at a relatively high temperature. If there is methylamine raw material in the produced liquid, it will react with water under high temperature conditions to produce ammonia (the methylamine raw material for NMP production is monomethylamine, and the monomethylamine aqueous solution is heated to high temperature). Ammonia gas will be produced, and the reaction equation is: CH3NH2+H2O=NH3+CH3OH. The water in the detection box 29 is replaced at any time and does not contain ammonia water. This indicates that the raw materials have not reacted completely. The generated gas will push the floating bucket 30 with a larger contact surface to move upward. The upward movement of the floating bucket 30 will drive the push rod 31 to move upward together. The upward movement of the push rod 31 will push the elastic plate 33 to undergo elastic deformation, so that the elastic plate 33 and the docking plate 34 are adapted to contact, and the circuit of the alarm 35 is turned on, so that the operator can know that the produced liquid has not reacted completely. At the same time, when the delivery pipe 22 delivers the liquid to the storage container, there is a risk of leakage at the connection with the storage container. If leakage occurs, the operation of the pump body 21 is stopped, and the hydraulic pressure on the cut-off plug 37 disappears. Under the action of the compression spring 38, the cut-off plug 37 will be pressed tightly with the small end of the cut-off bucket 36, so that the liquid cannot flow.

[0041] The further advantage of adopting the above method is that the liquid in the delivery pipe 22 can be sampled to understand whether the reaction is complete, which is convenient for adjusting the reaction conditions and reaction time, and the flow can be quickly cut off in case of leakage to prevent the residual liquid in the delivery pipe 22 from continuing to leak.

[0042] When the present invention is used, two raw materials for producing NMP are introduced from two feed hoppers 5 on one side of the outer shell 4. After the raw materials enter the feed hopper 5, they will be temporarily stored. Two pressurized air bags 9 in the outer shell 4 will respectively pressurize the feed hoppers 5 on both sides through two air pipes 8. After the pressurization is completed, the gas in the pressurized air bags 9 will gradually recover by continuously feeding (the feed hopper 5 is in a sealed connection state with the outside), so that the raw materials in the two feed hoppers 5 can enter the inner shell 10 on one side according to a preset ratio. The initial preheating ring 7 on the outer side wall of the feed pipe 6 will perform separate preliminary preheating on the conveyed raw materials, so that the two raw materials can be synchronously entered into the inner shell 10 at the ratio required for the reaction, and the initial separate preheating is completed during the conveying process, so that the raw materials can be subsequently mixed at a certain initial temperature;

[0043] The start control motor 11 drives the main gear 12 to rotate with the driving shaft. The rotation of the main gear 12 drives the meshing auxiliary gear ring 13 below to rotate together. The rotation of the auxiliary gear ring 13 drives the mixing shaft 14 to rotate. The mixing shaft 14 drives the mixing plate 15, the spiral conveying blade 16 and the mixing coil 17 to rotate together. The mixing plate 15 rotates in the inner shell 10 on one side, which drives the liquid raw materials input by the feeding pipes 6 on both sides to move. The rotation frequency of the mixing plate 15 is synchronized with the pressure frequency of the pressurized airbag 9. Then, the liquid raw materials move to the end of the mixing plate 15 under the action of the rotating centrifugal force and enter the preheating sleeve ring 18 through the conveying groove. The preheating sleeve ring 18 and the spiral conveying blade 16 are adapted to each other to prevent the liquid from being preheated. In a hot state, the raw materials directly enter the reaction inner cylinder 2. The liquid raw materials are transported into the reaction inner cylinder 2 under the action of the spiral conveying blades 16. The composite preheating ring 19 on the outer wall of the preheating ring 18 will further preheat the raw materials. The temperature in this preheating process is lower than the temperature at which methylamine is vaporized. After entering the reaction inner cylinder 2, the two raw materials are mixed more quickly and evenly under the action of the mixing coil 17. The heating mesh 20 on the outer wall of the reaction inner cylinder 2 keeps the interior at the reaction temperature, which is convenient for the raw materials to react directly after entering. In this way, the raw materials can react with each other directly after entering the reaction inner cylinder 2, avoiding side reactions in the process of gradually heating the two raw materials from low temperature to the reaction temperature after mixing, thereby improving the yield of NMP;

[0044] After the reaction is completed, the pump body 21 is started to introduce the liquid generated by the reaction into the delivery pipe 22. When it is necessary to conduct a random inspection on the raw material generation, the detection motor 23 is started to drive the driving gear 24 to rotate slowly through the reducer and the rotating shaft, and the driving gear 24 will drive the meshing driven gear ring 25 to rotate. The rotation of the driven gear ring 25 will drive the intermittent ring 26 to rotate together. The rotation of the intermittent ring 26 will drive the intermittent tube 27 to rotate in the outer solid ring 28. When the intermittent tube 27 is docked with the through hole on the delivery pipe 22, part of the liquid will be extracted into the intermittent tube 27. The intermittent tube 27 continues to rotate and the extracted liquid is transported to the detection box 29 through the through pipe. The water in the detection box 29 is kept at a relatively high temperature. If there is methylamine raw material in the produced liquid, it will react with water to produce ammonia under high temperature conditions (the methylamine raw material for NMP production is monomethylamine, and the monomethylamine aqueous solution will produce ammonia under high temperature conditions. The reaction equation is: CH3NH2+H2O=NH3+CH3OH, the detection box 29 The water in the pump 22 is replaced at any time and does not contain ammonia), indicating that the raw materials have not reacted completely. The generated gas will push the floating bucket 30 with a larger contact surface to move upward. The upward movement of the floating bucket 30 will drive the push rod 31 to move upward together. The upward movement of the push rod 31 will push the elastic plate 33 to undergo elastic deformation, allowing the elastic plate 33 to adapt to the contact with the docking plate 34, and connect the circuit of the alarm 35, so that the operator can know that the produced liquid has not reacted completely. At the same time, when the delivery pipe 22 delivers the liquid to the storage container, there is a risk of leakage at the connection with the storage container. If leakage occurs, the operation of the pump body 21 is stopped, and the hydraulic pressure on the shut-off plug 37 disappears. The shut-off plug 37 will be pressed against the small end of the shut-off bucket 36 under the action of the compression spring 38, so that the liquid cannot circulate. In this way, the liquid in the delivery pipe 22 can be sampled to understand whether the reaction is complete, which is convenient for adjusting the reaction conditions and reaction time, and quickly cut off the flow in case of leakage to prevent the residual liquid in the delivery pipe 22 from continuing to leak.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A horizontal large-scale NMP enhanced reactor, comprising a protective outer cylinder (1) and a reaction inner cylinder (2), characterized in that: Both ends of the protective outer cylinder (1) are connected to an outer shell (4), and both ends of the reaction inner cylinder (2) are connected to an inner shell (10). Two feed hoppers (5) are arranged on the outer wall of the outer shell (4) on one side. The side wall of the feed hopper (5) is connected to the inner shell (10) through a feed pipe (6). A plurality of initial preheating rings (7) are sleeved on the outer wall of the feed pipe (6). A pressurized air bag (9) is arranged between the outer shell (4) and the inner shell (10) on one side. A control motor (11) is fixedly connected to the upper side of the outer wall of the protective outer cylinder (1) via a mounting plate; the output end of the control motor (11) is connected to a gear assembly via a drive shaft; the gear assembly is connected to a mixing shaft (14); the end of the mixing shaft (14) is connected to a mixing plate (15); the outer side wall of the mixing shaft (14) is connected to a spiral conveying blade (16); a preheating assembly is arranged outside the spiral conveying blade (16); a pump body (21) is fixedly connected to the lower side of the outer side wall of the outer casing (4) on the other side; the delivery end of the pump body (21) is fixedly connected to a delivery pipe (22) via a conduit. ), the outer wall of the conveying pipe (22) is fixedly connected to a detection motor (23) through a fixing plate, the output end of the detection motor (23) is connected to a driving assembly through a rotating shaft, the driving assembly is connected to an intermittent ring (26), the outer wall of the intermittent ring (26) is connected to an outer fixed ring (28) through an intermittent pipe (27), the side wall of the outer fixed ring (28) is connected to a detection box (29) through a through pipe, a floating bucket (30) is arranged in the detection box (29), the top of the floating bucket (30) is connected to an alarm assembly through a push rod (31), and the inner wall of the end of the conveying pipe (22) is connected to a flow cut-off assembly.

2. A horizontal large-scale NMP enhanced reactor according to claim 1, characterized in that, The inner wall of the protective outer cylinder (1) is fixedly connected to the outer wall of the reaction inner cylinder (2) via a heating mesh (20); the end face of the protective outer cylinder (1) is fixedly connected to the end face of the outer shell (4); the end face of the reaction inner cylinder (2) is fixedly connected to the end face of the inner shell (10); two seat plates (3) are fixedly connected below the outer wall of the protective outer cylinder (1); and a mixing coil (17) is arranged in the reaction inner cylinder (2).

3. A horizontal large-scale NMP enhanced reactor according to claim 1, characterized in that, The outer wall of the pressurized airbag (9) is fixedly connected to the inner wall of the outer shell (4), the side wall of the pressurized airbag (9) is fixedly connected to the side wall of the feed hopper (5) via the air pipe (8), and the feed hopper (5) is fixedly connected to the outer wall of the outer shell (4) via the feed pipe (6).

4. A horizontal large-scale NMP enhanced reactor according to claim 1, characterized in that, The gear assembly is composed of a main gear (12) and a secondary gear ring (13), the main gear (12) meshing with the secondary gear ring (13), the output end of the control motor (11) is fixedly connected to the side wall of the main gear (12) via a drive shaft, and the inner side wall of the secondary gear ring (13) is fixedly connected to the outer side wall of the mixing shaft (14) via a plurality of connecting rods.

5. A horizontal large-scale NMP enhanced reactor according to claim 1, characterized in that, The end of the mixing shaft (14) is fixedly connected to the end surface of the mixing plate (15), both side walls of the mixing plate (15) are provided with conveying grooves, and the outer side wall of the mixing shaft (14) is fixedly connected to the inner side wall of the spiral conveying blade (16).

6. A horizontal large-scale NMP enhanced reactor according to claim 1, characterized in that, The preheating assembly is composed of a preheating ring (18) and a plurality of compound preheating rings (19); the inner wall of the compound preheating ring (19) is fixedly connected to the outer wall of the preheating ring (18); the inner wall of the preheating ring (18) is rotatably connected to the side wall of the spiral conveying blade (16); and the outer walls at both ends of the preheating ring (18) are fixedly connected to the inner wall of the inner casing (10).

7. A horizontal large-scale NMP enhanced reactor according to claim 1, characterized in that, The driving assembly is composed of a driving gear (24) and a driven gear ring (25); the output end of the detection motor (23) is fixedly connected to the side wall of the driving gear (24) through a rotating shaft; the driving gear (24) is meshed with the driven gear ring (25); the side wall of the driven gear ring (25) is fixedly connected to the end face of an intermittent ring (26); and the outer side wall of the intermittent ring (26) is rotatably connected to the inner side wall of an outer fixed ring (28) through an intermittent tube (27).

8. A horizontal large-scale NMP enhanced reactor according to claim 1, characterized in that, The alarm assembly is composed of an elastic plate (33) and a docking plate (34); a return spring (32) is sleeved on the outer wall of the push rod (31); an alarm (35) is fixedly connected to the top of the docking plate (34); the bottom end of the push rod (31) is fixedly connected to the top of the buoy (30); and water is arranged in the detection box (29).

9. A horizontal large-scale NMP enhanced reactor according to claim 1, characterized in that, The flow cut-off assembly consists of a flow cut-off bucket (36) and a flow cut-off plug (37), the outer wall of the flow cut-off bucket (36) is fixedly connected to the inner wall of the delivery pipe (22), the side wall of the flow cut-off plug (37) is fixedly connected to a perforated plate (39) via a compression spring (38), the side wall of the perforated plate (39) is fixedly connected to the inner wall of the delivery pipe (22), and the diameter of the flow cut-off plug (37) is slightly larger than the inner diameter of the small-mouth end of the flow cut-off bucket (36).

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