Ammonium nitrate solution concentration regulation reaction kettle with explosion-proof function

Abstract

The invention discloses an ammonium nitrate solution concentration regulation reaction kettle with an explosion-proof function, and belongs to the technical field of reaction kettle equipment. The reaction kettle comprises a reaction kettle body, the bottom of the reaction kettle body is communicated with a discharge valve, a solution can be uniformly heated through an electric heating plate in a groove in the bottom of the inner wall of the reaction kettle body, and explosion caused by gas generated by decomposition of ammonium nitrate due to over-high local temperature is avoided; the stirring rod is matched with the top motor, so that an ammonium nitrate solution in the reaction kettle can be fully stirred, and the concentration distribution of the solution is uniform. The circular rings arranged on the upper surface and the lower surface of the reaction kettle body and the anti-explosion pipe fixedly connected with the circular rings effectively enhance the overall structural strength of the reaction kettle, the air outlet pipe of the top circular ring is matched with the air inlet pipe of the bottom circular ring, and external cold air enters the space between the anti-explosion pipe and the reaction kettle body, so that the reaction kettle body is uniformly cooled; and then the gas is discharged to the outside from the gas outlet pipe. The explosion-proof device has the advantage of good explosion-proof effect.

Description

Technical Field

[0001] The invention belongs to the technical field of reactor equipment, in particular to an ammonium nitrate solution concentration adjustment reactor with an explosion-proof function. Background Art

[0002] Adjusting the concentration of ammonium nitrate solution is a crucial step in chemical production. As an important chemical raw material, ammonium nitrate is widely used in fields such as fertilizers and explosives. Adjusting the concentration of ammonium nitrate solution requires the use of a reactor to complete operations such as mixing and reacting the materials. However, ammonium nitrate is dangerous and prone to explosion under certain conditions (such as excessive temperature, inappropriate concentration, impact, or friction), placing extremely high demands on the safety of the reactor.

[0003] Existing reactors for adjusting the concentration of ammonium nitrate solutions have several deficiencies in their explosion-proofing capabilities. For one thing, the explosion-proof structure of traditional reactors is relatively simple, typically relying solely on explosion-proof disks or safety valves. However, these devices typically activate only after an explosion hazard has occurred and internal pressure has reached a certain threshold. This prevents early warning and intervention at the initial stage of an explosion risk, resulting in a certain lag.

[0004] Furthermore, the design of the stirring mechanism within the reactor may also be flawed. Inadequate stirring can lead to uneven mixing of materials and excessive concentration in certain areas, which can cause local overheating or abnormal reactions, increasing the possibility of explosion. Friction and static electricity generated during stirring can also contribute to explosions, but existing reactors often lack effective anti-static measures and frictional heat dissipation measures.

[0005] In summary, existing ammonium nitrate solution concentration adjustment reactors suffer from issues such as delayed early warnings and incomplete explosion-proof structures, failing to meet the high safety requirements of chemical production. Therefore, there is an urgent need to design an ammonium nitrate solution concentration adjustment reactor with more comprehensive explosion-proof features to improve the safety and reliability of the production process. Summary of the Invention

[0006] In order to solve the problems raised in the above background technology, the purpose of the present invention is to provide an ammonium nitrate solution concentration adjustment reactor with explosion-proof function, which has the advantage of good explosion-proof effect.

[0007] The present invention provides the following technical solution: a reactor for adjusting the concentration of ammonium nitrate solution with an explosion-proof function, comprising a reactor body, the bottom of the reactor body being connected to a discharge valve, the top of the reactor body being connected to a feed pipe, the surface of the feed pipe being threadedly connected to a sealing cover, the bottom of the inner wall of the reactor body being provided with a groove, and the inside of the groove being fixedly connected to an electric heating plate, the inside of the reactor body being rotatably connected to a stirring rod, the top of the reactor body being fixedly connected to a motor through a bracket, the output end of the motor being fixedly connected to the stirring rod, the top and bottom of the surface of the reactor body being fixedly connected to circular rings, the surface of the circular rings being fixedly connected to an explosion-proof pipe, the top of the circular ring being connected to an air outlet pipe, and the bottom of the circular ring being connected to an air inlet pipe, the inner wall of the explosion-proof pipe being fixedly connected to a spiral rack, and the spiral rack being fixedly connected to the reactor body.

[0008] The beneficial effects of the present invention are as follows: 1. The present invention adopts a discharge valve arranged at the bottom of the reactor body, and a feed pipe and a sealing cover arranged at the top, which not only ensures the orderly entry and exit of materials, but also enhances the sealing of the reactor through the threaded connection structure of the sealing cover, reducing the safety hazards caused by the entry of external impurities or leakage of internal materials. The electric heating plate in the groove at the bottom of the inner wall of the reactor body can evenly heat the solution to avoid local excessive temperature causing the decomposition of ammonium nitrate to produce gas and cause explosion; the coordinated design of the stirring rod and the top motor can fully stir the ammonium nitrate solution in the reactor to make the solution concentration uniformly distributed, preventing abnormal reactions or overheating due to local excessive concentration. The circular rings arranged above and below the surface of the reactor body and the explosion-proof tube fixedly connected to the rings form a support structure surrounding the reactor body, effectively enhancing the overall structural strength of the reactor and allowing it to withstand higher internal pressures. The spiral frame inside the explosion-proof tube is fixedly connected to the reactor body. On the one hand, the spiral structure disperses the pressure on the reactor body and reduces local stress concentration. The outlet pipe of the top circular ring cooperates with the inlet pipe of the bottom circular ring. The inlet pipe can be connected to an external cold air source. When the reactor body needs to be cooled, the external cold air enters the space between the explosion-proof tube and the reactor body, then moves upward along the spiral frame, thereby evenly cooling the reactor body. The gas is then discharged to the outside through the outlet pipe, which can be connected to a gas recovery device through a pipeline. The synergistic effect of the above structures improves the explosion-proof performance of the reactor in multiple dimensions, such as temperature control, concentration uniformity, structural strength, and pressure regulation. Compared with traditional explosion-proof designs that rely solely on the hysteresis of explosion-proof disks or safety valves, this structure can reduce the risk of explosion at the source and significantly improve the safety of the ammonium nitrate solution concentration preparation process. The device has the advantage of good explosion-proof effect.

[0009] 2. The present invention forms a set of active pressure regulation and early warning structures through the limit blocks, rubber pads, movable frames, movable columns, cone blocks and compression springs arranged in the square tube. The exhaust holes on the limit blocks provide a channel for gas discharge, and the fitting state of the rubber pad and the cone block can seal the exhaust holes. During normal operation, the elastic force of the compression spring presses the cone block tightly against the rubber pad to ensure the sealing inside the reactor; when the pressure inside the reactor rises abnormally, the internal gas pushes the cone block upward, compresses the compression spring, separates the cone block from the rubber pad, opens the exhaust holes, and the gas is discharged through the exhaust holes, achieving timely pressure relief and avoiding continuous pressure increase and explosion. The slide grooves on both sides of the inner wall of the square tube provide guidance for the sliding of the movable frame, ensuring the stability of the moving direction of the movable column and the cone block, and avoiding seal failure or poor exhaust due to offset. The anti-rust paint sprayed on the surface of the compression spring can effectively prevent the compression spring from rusting due to contact with humid gas or solution vapor, ensuring the stability and service life of the elastic force of the compression spring, and thus ensuring the long-term and reliable operation of the pressure regulation structure. This structure achieves pressure relief through the dynamic balance of mechanical force and gas pressure. Compared with the passive design of traditional explosion-proof disks that need to reach a fixed pressure threshold before bursting, this structure can adjust in real time according to pressure changes and intervene at the embryonic stage of explosion risk, significantly improving the timeliness and effectiveness of explosion protection. At the same time, it is reusable and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the present invention.

[0011] Figure 2 It is a front cross-sectional schematic diagram of the insulation layer and explosion-proof pipe structure of the present invention.

[0012] Figure 3 It is a front cross-sectional schematic diagram of the reactor body structure of the present invention.

[0013] Figure 4 It is a schematic diagram of the structure of the reactor body of the present invention.

[0014] Figure 5 This is a schematic diagram of the square tube, limit block and rubber pad structure of the present invention.

[0015] Figure 6 This is a schematic diagram of the structure of the limit block and rubber pad of the present invention. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0017] like Figures 1 to 6As shown, the ammonium nitrate solution concentration adjustment reactor of this embodiment includes a reactor body 1, the bottom of the reactor body 1 is connected to a discharge valve 3, the top of the reactor body 1 is connected to a feed pipe 2, the surface of the feed pipe 2 is threadedly connected to a sealing cover, the bottom of the inner wall of the reactor body 1 is provided with a groove, and the inside of the groove is fixedly connected to an electric heating plate 6, the inside of the reactor body 1 is rotatably connected to a stirring rod 4, the top of the reactor body 1 is fixedly connected to a motor 5 through a bracket, the output end of the motor 5 is fixedly connected to the stirring rod 4, the top and bottom of the surface of the reactor body 1 are fixedly connected to a ring 7, the surface of the ring 7 is fixedly connected to an explosion-proof pipe 8, the top of the top ring 7 is connected to an outlet pipe 9, and the bottom of the bottom ring 7 is connected to There is an air inlet pipe, and the inner wall of the explosion-proof pipe 8 is fixedly connected with a spiral rack 10, and the spiral rack 10 is fixedly connected to the reactor body 1. The inner wall of the reactor body 1 is respectively provided with a pressure detector and a temperature detector for detecting the pressure and temperature in the reactor body 1. A controller is provided on the outside of the reactor body 1, and the controller is connected to the electrical appliances in the device by signal for controlling the electrical appliances in the device. The above-mentioned pressure detector, temperature detector, controller, delivery pump and electric heating plate 6 are all existing common technologies and are common knowledge known to people in this field. This application will not go into details. The above-mentioned pressure detector, temperature detector and controller are not shown. The stirring rod 4 is spiral, and the surface of the stirring rod 4 is provided with an antistatic coating.

[0018] refer to Figure 5 The top of the reactor body 1 is connected to a square tube 11, and the inner wall of the square tube 11 is fixedly connected to a limit block 12. An exhaust hole is provided on the top of the limit block 12, and a rubber pad 13 is fixedly connected to the top of the limit block 12. Slide grooves are provided on both sides of the inner wall of the square tube 11, and the inner sliding connection of the slide groove is connected to a movable frame 14, and the inner sliding connection of the movable frame 14 is connected to a movable column 15. The bottom of the movable column 15 is fixedly connected to a cone block 16, which fits the rubber pad 13. The top of the cone block 16 is fixedly connected to a compression spring 17, and the end of the compression spring 17 away from the cone block 16 is fixedly connected to the movable frame 14, and the surface of the compression spring 17 is sprayed with anti-rust paint.

[0019] This embodiment forms an active pressure regulation and warning structure by means of a limit block 12, a rubber pad 13, a movable frame 14, a movable column 15, a cone block 16, and a compression spring 17 disposed within a square tube 11. The exhaust hole on the limit block 12 provides a channel for gas discharge, and the fitting state of the rubber pad 13 and the cone block 16 can seal the exhaust hole. During normal operation, the elastic force of the compression spring 17 causes the cone block 16 to press against the rubber pad 13, ensuring the sealing inside the reactor. When the pressure inside the reactor rises abnormally, the internal gas pushes the cone block 16 upward, compressing the compression spring 17, separating the cone block 16 from the rubber pad 13, opening the exhaust hole, and exhausting the gas through the exhaust hole, achieving timely pressure relief and preventing a continuous increase in pressure from causing an explosion. The sliding grooves on both sides of the inner wall of the square tube 11 provide guidance for the sliding of the movable frame 14, ensuring the stable movement direction of the movable column 15 and the cone block 16, and avoiding seal failure or poor exhaust due to offset. The anti-rust paint sprayed on the surface of compression spring 17 effectively prevents rust from contact with moist gases or solution vapors, ensuring the stability of the spring's elastic force and its service life, thereby ensuring the long-term reliable operation of the pressure regulating structure. This structure achieves pressure relief through a dynamic balance between mechanical force and gas pressure. Compared to the passive design of traditional explosion-proof disks that require a fixed pressure threshold to rupture, this structure can adjust in real time based on pressure changes, intervening at the initial stage of explosion risk, significantly improving the timeliness and effectiveness of explosion protection. It is also reusable, reducing maintenance costs.

[0020] refer to Figure 5 The top of the movable frame 14 is fixedly connected to a pressure detection block 19, the right side of the square tube 11 is fixedly connected to an electric cylinder 18, and the output end of the electric cylinder 18 is fixedly connected to the pressure detection block 19 through a connecting frame.

[0021] This embodiment utilizes a pressure detection block 19 at the top of the movable frame 14 in conjunction with an electric cylinder 18 on the right side of the square tube 11 to form an intelligent pressure monitoring and regulation system. The pressure detection block 19 senses the pressure acting on the movable frame 14 in real time—the force exerted by the internal gas pressure of the reactor, transmitted to the movable frame 14 via the cone block 16—and feeds back the pressure signal to a controller. The output of the electric cylinder 18 is connected to the pressure detection block 19 via a connecting frame. Based on the signal from the pressure detection block 19, the position of the movable frame 14 can be actively adjusted, thereby adjusting the initial compression of the compression spring 17 and altering the sealing pressure threshold between the cone block 16 and the rubber pad 13. When the production process requires adjusting the permissible pressure range within the reactor, the electric cylinder 18 can push the movable frame 14 up or down, compressing or releasing the compression spring 17, thereby flexibly setting the trigger pressure for pressure relief. When the pressure within the reactor slowly rises, the electric cylinder 18 can gradually adjust the position of the movable frame 14, smoothing the pressure relief process and preventing sudden pressure release from impacting the reactor structure. This structure upgrades the traditional passive explosion protection to active, adjustable intelligent explosion protection. It can not only adapt to the pressure control requirements under different production conditions, but also further improve the explosion-proof reliability of the reactor during the concentration adjustment of ammonium nitrate solution through real-time monitoring and dynamic adjustment, effectively solving the problem that the existing reactor explosion-proof structure cannot be flexibly intervened according to actual working conditions.

[0022] refer to Figure 2 The surface of the reactor body 1 is fixedly connected with a heat conducting block 22 . The number of the heat conducting blocks 22 is several and the heat conducting blocks 22 are evenly distributed on the surface of the reactor body 1 . The heat conducting blocks 22 are distributed between the upper and lower rings 7 .

[0023] This embodiment significantly improves the reactor's heat conduction efficiency and temperature uniformity through the use of multiple heat-conducting blocks 22 evenly distributed across the surface of the reactor body 1. When cold air enters the space between the reactor body 1 and the explosion-proof tube 8, the heat-conducting blocks 22 increase the contact area between the reactor body 1 and the cold air, thereby increasing the speed at which the cold air dissipates heat from the reactor body 1, rapidly cooling the reactor body 1 and preventing it from exploding due to overheating.

[0024] refer to Figure 3 A scraper frame 20 is fixedly connected to the surface of the stirring rod 4, and the scraper frame 20 is in contact with the inner wall of the reactor body 1.

[0025] In this embodiment, a scraper frame 20 fixedly connected to the surface of the stirring rod 4 is bonded to the inner wall of the reactor body 1, effectively scraping off any ammonium nitrate solution residue adhering to the inner wall of the reactor during the stirring process. Ammonium nitrate solution has a certain viscosity. If there is too much residual material on the inner wall, it may cause a local increase in concentration. Moreover, the residual material is easily crystallized due to water evaporation during heating, forming a high concentration of ammonium nitrate solid. Friction or impact during stirring may cause local explosions. At the same time, the accumulation of residual material also hinders heat transfer, resulting in uneven solution temperature near the inner wall, further increasing the risk of explosion. The provision of the scraper frame 20 allows the stirring rod 4 to simultaneously clean the inner wall during rotation, keeping the inner wall clean and avoiding material residue. In addition, the design of the scraper frame 20 bonded to the inner wall can also reduce the gap between the stirring rod 4 and the inner wall, enhancing the stirring effect, making the solution more evenly mixed, and reducing the possibility of local excessive concentration. At the same time, the presence of the scraper frame 20 can reduce the friction area between the solution and the inner wall during stirring, reducing the risk of static electricity generated by friction. Static electricity sparks are one of the main causes of ammonium nitrate solution explosions. Therefore, the provision of the scraper frame 20 optimizes the operating state of the reactor from multiple aspects such as cleaning of material residues, improving stirring uniformity, and reducing static electricity, and significantly enhances its explosion-proof capability.

[0026] refer to Figure 1 The bottom of the reactor body 1 is fixedly connected with a grounding wire 26 , and one end of the grounding wire 26 away from the reactor body 1 is fixedly connected with an insertion rod 27 .

[0027] This embodiment utilizes a grounding wire 26 and a plug 27 at the bottom of the reactor body 1 to effectively eliminate static electricity. During the stirring process of the ammonium nitrate solution, friction between the solution, the stirring rod 4, and the inner wall of the reactor generates static electricity. If this static electricity is not promptly eliminated, it can accumulate to form a high voltage. Sparks generated by the static discharge can ignite the ammonium nitrate solution or the combustible gases produced by its decomposition, potentially causing an explosion. One end of the grounding wire 26 is fixedly connected to the reactor body 1, while the other end is inserted into the ground via the plug 27. This allows static electricity accumulated on the reactor body 1 to be directly directed to the ground, preventing static electricity accumulation. The design of the plug 27 increases the contact area between the grounding wire 26 and the ground, ensuring the effectiveness of static electricity elimination. Furthermore, the installation of the grounding wire 26 does not affect the normal operation of the reactor, requiring no additional energy input and resulting in low maintenance costs. This structure allows static electricity generated during reactor operation to be promptly eliminated, effectively preventing explosions caused by static electricity sparks and further improving the safety of the ammonium nitrate solution concentration adjustment process.

[0028] refer to Figure 1 The surface of the explosion-proof pipe 8 is fixedly connected with a thermal insulation layer 21 .

[0029] In this embodiment, the insulation layer 21 fixedly attached to the surface of the explosion-proof tube 8 effectively maintains a stable temperature. The provision of the insulation layer 21 reduces heat exchange between the explosion-proof tube 8 and the external environment, maintaining a relatively stable internal temperature within the explosion-proof tube 8 and, consequently, within the reactor body 1. The insulation layer 21 also reduces heat loss from the reactor through the explosion-proof tube 8, improving heating efficiency and reducing energy consumption. The provision of the insulation layer 21 effectively safeguards the structural stability and explosion-proof performance of the explosion-proof tube 8, ensuring its continued explosion-proof performance during long-term operation and enhancing the overall reliability and safety of the reactor.

[0030] refer to Figure 1 A support column 23 is provided below the reactor body 1. There are four support columns 23. A sliding groove is provided on the top of the support column 23, and a support frame 24 is slidably connected to the inside of the sliding groove. The support frame 24 is fixedly connected to the reactor body 1. A slot is provided on the surface of the support frame 24, and there are several slots. The internal thread of the support column 23 is connected with a bolt 25, and the bolt 25 is plugged into the slot.

[0031] In this embodiment, an adjustable support structure is formed by the support column 23, sliding groove, support frame 24, slot, and bolt 25 below the reactor body 1. The sliding groove at the top of the support column 23 allows the support frame 24 to slide in the vertical direction. By adjusting the position of the support frame 24 within the sliding groove, the height of the reactor body 1 can be fine-tuned. The multiple slots on the surface of the support frame 24 cooperate with the bolts 25 in the support column 23 to fix the position of the support frame 24. At the same time, by selecting different slots, the height of the reactor body 1 can be adjusted to accommodate different discharge equipment or operating space requirements. Fixation is achieved by plugging the bolts 25 into the slots, which facilitates maintenance, significantly improves the installation flexibility and operational stability of the reactor, and indirectly enhances its explosion-proof performance.

[0032] The present invention first needs to complete the installation and debugging of the device. Place the four support columns 23 below the reactor body 1 on a flat and stable ground, adjust the height of the reactor body 1 through the support frame 24 in the sliding groove on the top of the support column 23, align and plug the slots on the surface of the support frame 24 with the bolts 25 inside the support column 23 according to the position of the discharge equipment or the operating space requirements, tighten the bolts 25 to fix the support frame 24, and ensure that the reactor body 1 is stable. Check whether the insulation layer 21 on the surface of the explosion-proof pipe 8 is intact, and confirm that the insulation layer 21 is not damaged to ensure the temperature of the explosion-proof pipe 8 is stable and reduce the heat exchange between the reactor body 1 and the outside world. Insert the rod 27 at one end of the grounding wire 26 firmly into the ground to ensure that the static electricity of the reactor body 1 can be effectively discharged through the grounding wire 26 to avoid the danger caused by static electricity accumulation.

[0033] After the installation is completed, perform inspection and preparation before use. Open the sealing cover on the top of the reactor body 1, clean the inside of the reactor body 1, and ensure that there is no material residue on the inner wall to avoid affecting the concentration adjustment. Check whether the scraper frame 20 on the surface of the stirring rod 4 is in contact with the inner wall of the reactor body 1. If there is any deviation, it needs to be adjusted to ensure that the scraper frame 20 can effectively scrape off the ammonium nitrate solution remaining on the inner wall during stirring to prevent local excessive concentration and material crystallization. Confirm that the electric heating plate 6 is located in the groove at the bottom of the inner wall of the reactor body 1 and is firmly fixed, the spiral frame 10 is tightly connected to the reactor body 1, the outlet pipe 9 of the top ring 7 and the inlet pipe of the bottom ring 7 are not blocked, the inlet pipe can be connected to an external cooling air source as needed, and the outlet pipe 9 is connected to the gas recovery equipment. Start the controller and check whether the pressure detector and temperature detector are working properly to ensure that they can monitor the pressure and temperature in the reactor body 1 in real time and feed back to the controller.

[0034] To begin adding materials, inject ammonium nitrate solution and other required materials into reactor 1 through feed tube 2. After addition is complete, tighten the sealing cap along the threads on feed tube 2 to ensure a tight seal on reactor 1 and prevent the ingress of foreign matter or leakage of internal materials. Start motor 5 on the top bracket. The output of motor 5 drives stirring rod 4, and scraper frame 20 rotates synchronously with stirring rod 4, stirring the materials in the reactor to ensure uniform mixing and reduce local concentration differences. According to the process requirements, the electric heating plate 6 is turned on by the controller, and the electric heating plate 6 evenly heats the solution at the bottom of the inner wall of the reactor body 1. During the heating process, if the temperature of the reactor body 1 needs to be cooled and adjusted, external cold air can be introduced through the air inlet pipe. The cold air enters the space between the explosion-proof pipe 8 and the reactor body 1, and spirally rises along the spiral rack 10 on the inner wall of the explosion-proof pipe 8 to evenly cool the reactor body 1. The cooled gas is discharged into the gas recovery equipment from the outlet pipe 9. At the same time, the heat-conducting blocks 22 evenly distributed on the surface of the reactor body 1 increase the contact area with the cold air, improve the heat dissipation efficiency, and ensure precise temperature control.

[0035] During the solution preparation process, the pressure regulation system works in real time to ensure safety. Under normal conditions, the cone block 16 at the bottom of the movable frame 14 in the square tube 11 presses the rubber pad 13 at the top of the limit block 12 under the elastic force of the compression spring 17, sealing the exhaust hole on the limit block 12 and maintaining the internal sealing of the reactor body 1. When the pressure in the reactor body 1 rises abnormally, the gas pressure pushes the cone block 16 upward, compressing the compression spring 17, separating the cone block 16 from the rubber pad 13, opening the exhaust hole, and the internal gas is discharged through the exhaust hole to release the pressure. At the same time, the pressure detection block 19 at the top of the movable frame 14 feeds back the pressure signal to the controller. The controller controls the electric cylinder 18 on the right side of the square tube 11 according to the preset parameters. The electric cylinder 18 pushes the pressure detection block 19 and the movable frame 14 up and down through the connecting frame, adjusts the initial compression of the compression spring 17, and thus flexibly sets the trigger pressure of the pressure relief, realizing dynamic adjustment of the pressure in the reactor and avoiding the impact of sudden pressure release on the equipment.

[0036] When the solution temperature and pressure are stable within the range required by the process, continue stirring for a period of time to ensure that the concentration of the ammonium nitrate solution is uniform. During the stirring process, the scraper frame 20 continuously cleans the inner wall of the reactor body 1 to prevent the accumulation of residual materials, which leads to increased local concentration and obstruction of heat transfer. At the same time, it reduces the static electricity generated by friction during the stirring process, and cooperates with the static electricity conduction function of the grounding wire 26 to further reduce the risk of explosion. After the concentration is adjusted, turn off the motor 5 and the electric heating plate 6, and stop stirring and heating. If the temperature of the reactor body 1 is high, continue to let in cold air through the air inlet pipe to cool it down until the temperature drops to a safe range.

[0037] Finally, the discharge operation is performed by opening the discharge valve 3 at the bottom of the reactor body 1 to discharge the prepared ammonium nitrate solution into the subsequent equipment. After the discharge is completed, the sealing cover is opened again, and the interior of the reactor body 1 is thoroughly cleaned. Check whether the components are worn or abnormal, such as whether the anti-rust paint on the surface of the compression spring 17 is intact, and whether the explosion-proof pipe 8, the spiral frame 10, the heat-conducting block 22, etc. are damaged, to ensure that the equipment is in good condition and ready for the next use. During the entire use process, it is necessary to pay close attention to the pressure and temperature data displayed on the controller, strictly follow the process regulations, ensure that the concentration preparation process of the ammonium nitrate solution is carried out safely and efficiently, give full play to the explosion-proof advantages of the device in temperature control, pressure regulation, static elimination, material stirring, etc., and ensure the safety and reliability of chemical production.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A reaction kettle for adjusting the concentration of ammonium nitrate solution with explosion-proof function, comprising a reaction kettle body (1), characterized in that: The bottom of the reactor body (1) is connected to a discharge valve (3), the top of the reactor body (1) is connected to a feed pipe (2), the surface of the feed pipe (2) is threadedly connected to a sealing cover, the bottom of the inner wall of the reactor body (1) is provided with a groove, and the inside of the groove is fixedly connected to an electric heating plate (6), the inside of the reactor body (1) is rotatably connected to a stirring rod (4), the top of the reactor body (1) is fixedly connected to a motor (5) through a bracket, the output end of the motor (5) is fixedly connected to the stirring rod (4), the top and bottom of the surface of the reactor body (1) are fixedly connected to a ring (7), the surface of the ring (7) is fixedly connected to an explosion-proof pipe (8), the top of the ring (7) is connected to an air outlet pipe (9), the bottom of the ring (7) is connected to an air inlet pipe, the inner wall of the explosion-proof pipe (8) is fixedly connected to a spiral rack (10), and the spiral rack (10) is fixedly connected to the reactor body (1).

2. The explosion-proof reaction kettle for adjusting the concentration of ammonium nitrate solution according to claim 1, characterized in that: The top of the reactor body (1) is connected to a square tube (11), the inner wall of the square tube (11) is fixedly connected to a limit block (12), the top of the limit block (12) is provided with an exhaust hole, the top of the limit block (12) is fixedly connected to a rubber pad (13), both sides of the inner wall of the square tube (11) are provided with a slide groove, and the inside of the slide groove is slidably connected to a movable frame (14), the inside of the movable frame (14) is slidably connected to a movable column (15), the bottom of the movable column (15) is fixedly connected to a cone block (16), the cone block (16) is fitted with the rubber pad (13), the top of the cone block (16) is fixedly connected to a compression spring (17), the end of the compression spring (17) away from the cone block (16) is fixedly connected to the movable frame (14), and the surface of the compression spring (17) is sprayed with anti-rust paint.

3. The explosion-proof reaction kettle for adjusting the concentration of ammonium nitrate solution according to claim 2, characterized in that: The top of the movable frame (14) is fixedly connected to a pressure detection block (19), the right side of the square tube (11) is fixedly connected to an electric cylinder (18), and the output end of the electric cylinder (18) is fixedly connected to the pressure detection block (19) via a connecting frame.

4. The explosion-proof reaction kettle for adjusting the concentration of ammonium nitrate solution according to claim 3, characterized in that: The surface of the reactor body (1) is fixedly connected with a heat-conducting block (22), and the number of the heat-conducting blocks (22) is several. The heat-conducting blocks (22) are evenly distributed on the surface of the reactor body (1), and the heat-conducting blocks (22) are distributed between the upper and lower rings (7).

5. The explosion-proof reaction kettle for adjusting the concentration of ammonium nitrate solution according to claim 4, characterized in that: A scraper frame (20) is fixedly connected to the surface of the stirring rod (4), and the scraper frame (20) is in contact with the inner wall of the reactor body (1).

6. The explosion-proof reaction kettle for adjusting the concentration of ammonium nitrate solution according to claim 5, characterized in that: The bottom of the reactor body (1) is fixedly connected to a grounding wire (26), and one end of the grounding wire (26) away from the reactor body (1) is fixedly connected to a plug rod (27).

7. The explosion-proof reaction kettle for adjusting the concentration of ammonium nitrate solution according to claim 6, characterized in that: A thermal insulation layer (21) is fixedly connected to the surface of the explosion-proof tube (8).

8. The explosion-proof reaction kettle for adjusting the concentration of ammonium nitrate solution according to claim 7, characterized in that: A support column (23) is provided below the reactor body (1), and the number of the support columns (23) is four. A sliding groove is provided on the top of the support column (23), and a support frame (24) is slidably connected to the inside of the sliding groove. The support frame (24) is fixedly connected to the reactor body (1). A plurality of slots are provided on the surface of the support frame (24). Bolts (25) are threadedly connected to the inside of the support column (23), and the bolts (25) are plugged into the slots.

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