Reaction kettle for preparing insoluble sulfur

Abstract

The utility model discloses an insoluble sulfur preparation reaction kettle which comprises a support seat, and a reaction kettle main body used for rotating, stirring, rolling and splashing insoluble sulfur through a driving shaft with a hollow structure is rotationally arranged on the inner side of the support seat, so that nitrogen can be injected for reaction; driving shafts at two ends of the reaction kettle main body are respectively and hermetically rotated into a nitrogen inlet pipe and a raw material inlet pipe which do not rotate along with the reaction kettle main body, the driving shafts drive the whole reaction kettle main body to rotate, and a sulfur material forms spiral rolling and throwing movement under the action of centrifugal force and gravity in cooperation with a reaction stirring rod with circumferential radiation of the inner wall; and the local vortex mixing mode of the traditional static stirring paddle is thoroughly broken. According to the composite stirring mode, the material mixing range is expanded to the whole reaction cavity from a local area near the stirring paddle, so that full contact and uniform distribution of gas and solid phases in a three-dimensional space are realized, a reaction blind area is effectively eliminated, and the uniformity and conversion rate of vulcanization reaction are remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of insoluble sulfur preparation technology, specifically relating to an insoluble sulfur preparation reaction vessel. Background Technology

[0002] In the modern chemical industry, insoluble sulfur is an important rubber vulcanizing agent, and the performance of the core equipment in its preparation process—the reaction vessel—directly affects product quality and production efficiency. Traditional insoluble sulfur preparation reaction equipment generally suffers from technical bottlenecks such as uneven material mixing, low gas-liquid reaction efficiency, and poor coordination between vacuum environment construction and material transportation. Existing reaction equipment mostly uses static stirring paddles or a single rotating shaft for stirring, which makes it difficult to achieve sufficient tumbling of sulfur particles and uniform distribution of nitrogen gas, resulting in incomplete vulcanization reaction.

[0003] To address the aforementioned issues, existing preparation devices mostly employ a fixed-shaft stirring structure, using a central stirring paddle or side blades to agitate the material. This static stirring mode has significant technical drawbacks: firstly, the material only forms local eddies near the stirring paddle, and sulfur particles far from the stirring area are difficult to effectively tumble, resulting in insufficient gas-solid two-phase contact area, and nitrogen injection easily leads to local enrichment or reaction blind zones. Utility Model Content

[0004] The purpose of this invention is to provide an insoluble sulfur preparation reactor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reaction vessel for preparing insoluble sulfur, comprising:

[0006] The support base has a hollow drive shaft inside which is provided a reactor body for rotating, stirring, tumbling, and splashing insoluble sulfur to facilitate the injection of nitrogen for reaction. The drive shafts at both ends of the reactor body are respectively sealed and rotated into nitrogen inlet pipes and raw material inlet pipes that do not rotate with the reactor body.

[0007] The surfaces of the extensions at both ends of the reactor body are provided with stabilizing limiting rings to keep the reactor body rotating stably. The drive shaft at one end of the reactor body is provided with a drive component to drive the reactor body to rotate. One end of the raw material inlet pipe is connected to a vacuum pump for evacuating the reactor body and a feed pump for conveying insoluble sulfur through a three-way control valve.

[0008] Preferably, the upper end of the support base is symmetrically provided with upright plates, and the drive shafts at both ends of the reactor body rotate through the upright plates. The front end of the upright plate is provided with a control panel with a built-in PLC controller. The control panel is connected to the motor, valve body and pump body in the reactor. The lower inner side of the upright plate is provided with a receiving frame. The PLC controller integrates the automatic control of the motor, valve body and pump body, solving the problems of cumbersome manual operation and lagging parameter adjustment in traditional equipment, and realizing precise management of the reaction process.

[0009] Preferably, each of the vertical plates is provided with a stabilizing sleeve on its corresponding surface, and one end of the stabilizing sleeve is movably sleeved on both ends of the reactor body, so that the stabilizing sleeve is movably limited in the limiting groove on the stabilizing limiting ring, allowing the stabilizing limiting ring to maintain stable rotation. The stabilizing sleeve is embedded in the limiting groove of the stabilizing limiting ring to form a dynamic rolling support structure, which effectively suppresses the radial displacement when the reactor body rotates.

[0010] Preferably, the nitrogen inlet pipe and the raw material inlet pipe are fitted with bearing sleeves at one end inside the drive shaft, and the outer ring of the bearing sleeve is fixed on the inner wall of the nitrogen inlet pipe and the raw material inlet pipe. One end of the nitrogen inlet pipe is provided with a gas valve, so that the stationary pipeline and the rotating drive shaft can achieve low-friction rotational connection, avoid rigid contact wear of traditional dynamic and static sealing interfaces, and ensure stable input of nitrogen and raw materials in dynamic environment.

[0011] Preferably, a rubber sealing disc is provided at one end of the drive shaft that is connected to the reactor body. The inner ring of the rubber sealing disc is sealed and fitted to the surface of the nitrogen inlet pipe and the raw material inlet pipe outlet, forming a double sealing protection, solving the leakage risk of traditional hard seals under long-term vibration, and ensuring the stability of the vacuum environment and reaction atmosphere.

[0012] Preferably, the driving component includes a secondary gear mounted on a drive shaft at one end of the reactor body and a speed-regulating motor disposed on the outer side of the vertical plate. The motor shaft is provided with a main gear that meshes with the secondary gear, so that the material forms a rolling and scattering effect of different intensities under the action of centrifugal force and stirring rod.

[0013] Preferably, a reaction stirring rod is uniformly arranged in the reaction chamber extending outward from the center of the reactor body, and a discharge pipe with a material valve is provided at the bottom of the reactor body.

[0014] Preferably, the upper port of the three-way control valve on the raw material inlet pipe is connected to the vacuum pump via an air pipe, and the other port of the three-way control valve is connected to the discharge port of the feeding pump via a pipe. Both the vacuum pump and the feeding pump are fixed on the outer side of the vertical plate, replacing the traditional multi-valve complex pipeline, solving the problem of poor coordination between vacuum environment construction and material transportation, and reducing the risk of human operation error.

[0015] Compared with the prior art, the technical effects and advantages of this utility model are as follows: This insoluble sulfur preparation reactor...

[0016] The drive shaft rotates the entire reactor body, and in conjunction with the circumferentially radiating reaction stirring rods on the inner wall, the sulfur material undergoes a spiral tumbling and scattering motion under the action of centrifugal force and gravity, completely breaking the localized vortex mixing mode of traditional static stirring paddles. This composite stirring method expands the material mixing range from the local area near the stirring paddle to the entire reaction chamber, achieving full contact and uniform distribution of the gas and solid phases in three-dimensional space, effectively eliminating reaction blind zones, and significantly improving the uniformity and conversion rate of the sulfurization reaction.

[0017] The stabilizing limiting ring and stabilizing sleeve work together to form a dynamic rolling support system. The limiting groove constrains the radial offset of the reactor body, and combined with the flexible sealing structure of the bearing sleeve and rubber sealing disc, it solves the problems of vibration wear and sealing leakage caused by high-speed operation in traditional rotating equipment. The stationary nitrogen inlet pipe and raw material inlet pipe are connected to the hollow drive shaft with low friction via the bearing sleeve, maintaining the stability of the pipeline system while allowing the reactor body to rotate freely. This ensures a continuous and stable injection of nitrogen from the central shaft position during material tumbling, maintaining the reliability of the vacuum environment and reaction atmosphere, and providing structural protection for efficient reactions.

[0018] The PLC controller integrates the automated control of the motor, valve body, and pump body, and, in conjunction with the three-way control valve at the raw material inlet, enables one-button switching between vacuum filtration and material conveying, replacing the traditional complex multi-valve pipeline system. The vacuum pump and the feed pump are connected to the reactor through a single valve, reducing the risk of human error and improving the coordinated efficiency of vacuum environment construction and material conveying. Attached Figure Description

[0019] Figure 1 This is a front internal view of the reaction vessel for preparing insoluble sulfur according to this utility model;

[0020] Figure 2 This is a front view of the nitrogen inlet pipe of the insoluble sulfur preparation reactor of this utility model;

[0021] Figure 3 This is a side view of the main body of the reaction vessel for preparing insoluble sulfur according to this utility model;

[0022] Figure 4 This is a front view of the reaction vessel for preparing insoluble sulfur according to this invention.

[0023] In the diagram: 1. Support base; 2. Reactor body; 3. Drive shaft; 4. Nitrogen inlet pipe; 5. Raw material inlet pipe; 6. Stabilizing limit ring; 7. Drive component; 8. Three-way control valve; 9. Vacuum pump; 10. Feed pump; 11. Vertical plate; 12. Material receiving frame; 13. Stabilizing sleeve; 14. Bearing sleeve; 15. Rubber sealing disc; 16. Secondary gear; 17. Speed ​​regulating motor; 18. Main gear; 19. Reactor stirring rod; 20. Discharge pipe; 21. Control panel. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 This utility model provides a technical solution: a reaction vessel for preparing insoluble sulfur, comprising:

[0026] The support base 1 houses and rotates the hollow drive shaft 3 to form a reaction vessel body 2 for rotating, stirring, tumbling, and splashing insoluble sulfur to facilitate the injection of nitrogen for reaction. The drive shaft 3 at both ends of the reaction vessel body 2 is sealed and rotated into a nitrogen inlet pipe 4 and a raw material inlet pipe 5, which do not rotate with the reaction vessel body 2. The drive shaft 3 is made of high-strength alloy steel, and the diameter of the hollow cavity is adapted to the outer diameter of the nitrogen inlet pipe 4 and the raw material inlet pipe 5 to form a coaxial nested structure.

[0027] The surfaces of the extensions at both ends of the reactor body 2 are provided with stabilizing limiting rings 6 to keep the reactor body 2 rotating stably. The outer circumferential surface of the stabilizing limiting rings 6 is machined with annular limiting grooves, the depth and width of which are adapted to the inner flange structure of the stabilizing sleeve 13. The drive shaft 3 at one end of the reactor body 2 is provided with a drive component 7 for driving the reactor body 2 to rotate. One end of the raw material inlet pipe is connected to a vacuum pump 9 for evacuating the reactor body 2 and a feed pump 10 for conveying insoluble sulfur through a three-way control valve 8. The three-way control valve 8 is a pneumatic reversing valve, and the inner diameter of the valve port is consistent with the outer diameter of the connecting pipe of the raw material inlet pipe 5, the vacuum pump 9, and the feed pump 10 to ensure smooth gas and liquid flow.

[0028] The support base 1 is symmetrically provided with vertical plates 11 at the upper end, and the drive shafts 3 at both ends of the reactor body 2 rotate through the vertical plates 11. The front end of the vertical plate 11 is provided with a control panel 21 with a built-in PLC controller. The control panel 21 integrates a touch screen display, which can display parameters such as reactor speed, internal pressure, and nitrogen flow rate in real time. The control panel 21 is connected to the motor, valve body, and pump body in the reactor through a waterproof cable. The lower inner side of the vertical plate 11 is provided with a receiving frame 12 with an inclined bottom plate. The inner wall of the receiving frame is coated with Teflon to prevent material adhesion.

[0029] Each of the corresponding surfaces of the vertical plate 11 is provided with a stabilizing sleeve 13, and one end of the stabilizing sleeve 13 is movably sleeved on both ends of the reactor body 2, so that the stabilizing sleeve 13 is movably limited in the limiting groove on the stabilizing limiting ring 6. The stabilizing sleeve 13 is made of self-lubricating bearing material, and the inner wall is inlaid with balls to reduce rotational friction resistance, so that the stabilizing limiting ring 6 can maintain stable rotation.

[0030] Nitrogen inlet pipe 4 and raw material inlet pipe 5 are located inside drive shaft 3 and one end is fitted with a bearing sleeve 14. The outer ring of the bearing sleeve 14 is fixed to the inner wall of nitrogen inlet pipe 4 and raw material inlet pipe 5 by welding. The bearing sleeve 14 adopts a deep groove ball bearing structure, and the inner ring is interference-fitted with the outer circle surface of drive shaft 3. One end of nitrogen inlet pipe 4 is equipped with a pneumatic valve, and the valve opening degree can be remotely adjusted through control panel 21.

[0031] A rubber sealing disc 15 is provided at one end of the drive shaft 3 that is connected to the reactor body 2. The inner ring of the rubber sealing disc 15 is formed by molding to form a sealing flange that fits against the outer surface of the nitrogen inlet pipe 4 and the raw material inlet pipe 5 outlet. The flange width is 10-15mm and is made of sulfur-resistant fluororubber material to ensure dynamic sealing reliability.

[0032] The driving component 7 includes a secondary gear 16 mounted on a drive shaft 3 at one end of the reactor body 2 and a speed-regulating motor 17 disposed on the outer side of the vertical plate 11. The gear ratio of the secondary gear 16 to the main gear 18 is 3:1. The speed-regulating motor 17 is a servo motor with a speed adjustment range of 0-300 r / min. The main gear 18 meshing with the secondary gear 16 is provided on the rotating shaft of the speed-regulating motor 17. The meshing gap between the two gears is adjusted by bearing seat bolts.

[0033] The reaction chamber inside the reactor body 2 is arranged in a circular pattern extending outward from the center. There are 6 reaction stirring rods 19, which are distributed at 60° intervals. The cross-section of the rod is triangular to enhance the material cutting effect. The bottom of the reactor body 2 is equipped with a discharge pipe 20 with a pneumatic material valve. The inner diameter of the discharge pipe is 50mm, and the opening and closing response time of the material valve is ≤2 seconds.

[0034] The upper port of the three-way control valve 8 on the raw material inlet pipe 5 is connected to the air pump 9 through a pressure-resistant air pipe, and the other port of the three-way control valve 8 is connected to the discharge port of the feed pump 10 through a corrosion-resistant pipe. Both the air pump 9 and the feed pump 10 are fixed to the outer side of the vertical plate 11 by bolts. Anti-vibration rubber pads are provided between the pump body and the vertical plate to reduce vibration noise.

[0035] Specifically, during operation, the equipment is started and prepared as follows: The speed-regulating motor 17 drives the hollow drive shaft 3 and the reactor body 2 to rotate through the meshing of the main gear 18 and the auxiliary gear 16. The stabilizing sleeve 13 is embedded in the limiting groove of the stabilizing limiting ring 6, forming a stable rolling support to prevent radial displacement of the reactor body during rotation. At the same time, the nitrogen inlet pipe 4 and the raw material inlet pipe 5 are fixed inside the drive shaft 3 by the bearing sleeve 14. The outer ring of the bearing sleeve is fixed to the inner wall of the pipe, and the inner ring rotates with the drive shaft, achieving a low-friction dynamic seal between the stationary pipe and the rotating reactor body. The rubber sealing disc 15 further seals the pipe outlet to prevent nitrogen leakage. The gas valve is opened, and nitrogen is injected into the reactor from the central shaft, expelling the internal air and creating an inert reaction environment.

[0036] Material Input and Vacuum Construction: The three-way control valve 8 switches to "feeding mode," and the feeding pump 10 delivers sulfur raw material into the reactor body 2 through the raw material inlet pipe 5. The raw material inlet pipe is connected to the hollow drive shaft to ensure stable material input even when the reactor body rotates. After feeding is completed, the three-way control valve switches to "vacuum mode," and the vacuum pump 9 performs vacuuming treatment inside the reactor through the raw material inlet pipe. The PLC controller monitors the vacuum level in real time and automatically shuts off the vacuum pump when the preset value is reached, simplifying the operation process and reducing the risk of leakage.

[0037] Reaction Process: As the main body 2 of the reactor rotates, the stirring rod 19 on the inner wall undergoes centrifugal motion along with the reactor body, producing cutting, crushing, scattering, tumbling, and impact mixing effects on the materials. The stirring rod breaks up the sulfur materials, increasing their specific surface area; centrifugal force causes the materials to move upward along the reactor wall, and after reaching the top, they fall freely under gravity, forming a circulating tumbling effect; during the tumbling process, the material particles collide with each other and come into full contact with the nitrogen gas injected from the central shaft. The nitrogen gas permeates and diffuses in the gaps formed by the scattering of the materials, achieving uniform mixing and efficient reaction of the gas and solid phases in three-dimensional space. Compared with traditional static stirring, this significantly improves the sulfurization reaction rate and uniformity.

[0038] Reaction Control and Discharge: The PLC controller coordinates the operation of various components according to a preset program, controls the reactor speed by adjusting the speed-regulating motor, adjusts the nitrogen flow rate according to the reaction progress, and automatically switches between actions such as feeding, vacuuming, and discharging. After the reaction is completed, the material valve of the discharge pipe 20 is opened, and the material is discharged under gravity. The inclined design at the bottom of the reactor ensures that no material remains. The receiving frame 12 collects the splashed material during discharge for easy cleaning. The detachable structure of the stabilizing limit ring and stabilizing sleeve, combined with the smooth inner wall of the reactor, facilitates equipment cleaning and maintenance and reduces the risk of scaling.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reaction vessel for preparing insoluble sulfur, characterized in that, include: The support base (1) has a hollow drive shaft (3) inside which a reaction vessel body (2) is provided for rotating, stirring, tumbling and splashing insoluble sulfur to facilitate the injection of nitrogen gas for reaction. The drive shaft (3) at both ends of the reaction vessel body (2) is sealed and rotated into a nitrogen gas inlet pipe (4) and a raw material inlet pipe (5) that do not rotate with the reaction vessel body (2). The surfaces of the extensions at both ends of the reactor body (2) are provided with stabilizing limiting rings (6) to keep the reactor body (2) rotating stably. The drive shaft (3) at one end of the reactor body (2) is provided with a drive component (7) to drive the reactor body (2) to rotate. The outer end of the raw material inlet pipe is connected to a vacuum pump (9) for evacuating the reactor body (2) and a feed pump (10) for conveying insoluble sulfur through a three-way control valve (8).

2. The insoluble sulfur preparation reactor according to claim 1, characterized in that: The support base (1) is symmetrically provided with upright plates (11) at the upper end, and the drive shafts (3) at both ends of the reactor body (2) rotate through the upright plates (11). The front end of the upright plate (11) is provided with a control panel (21) with a built-in PLC controller. The control panel (21) is connected to the motor, valve body and pump body in the reactor. The lower inner side of the upright plate (11) is provided with a receiving frame (12).

3. The insoluble sulfur preparation reactor according to claim 2, characterized in that: Each of the vertical plates (11) is provided with a stabilizing sleeve (13) on the corresponding surface. One end of the stabilizing sleeve (13) is movably sleeved on both ends of the reactor body (2), so that the stabilizing sleeve (13) is movably limited in the limiting groove on the stabilizing limiting ring (6), so that the stabilizing limiting ring (6) keeps rotating stably.

4. The insoluble sulfur preparation reactor according to claim 1, characterized in that: The nitrogen inlet pipe (4) and the raw material inlet pipe (5) are located inside the drive shaft (3) and one end is fitted with a bearing sleeve (14). The outer ring of the bearing sleeve (14) is fixed on the inner wall of the nitrogen inlet pipe (4) and the raw material inlet pipe (5). One end of the nitrogen inlet pipe (4) is provided with a gas valve.

5. The insoluble sulfur preparation reactor according to claim 1, characterized in that: A rubber sealing disc (15) is provided at one end of the drive shaft (3) that is connected to the reactor body (2). The inner ring of the rubber sealing disc (15) is sealed and attached to the surface of the nitrogen inlet pipe (4) and the raw material inlet pipe (5) outlet.

6. The insoluble sulfur preparation reactor according to claim 2, characterized in that: The driving component (7) includes a secondary gear (16) mounted on a drive shaft (3) at one end of the reactor body (2) and a speed-regulating motor (17) located on the outer side of the vertical plate (11). The rotating shaft of the speed-regulating motor (17) is provided with a main gear (18) that meshes with the secondary gear (16).

7. The insoluble sulfur preparation reactor according to claim 1, characterized in that: The reaction chamber extending outward from the center of the reactor body (2) is uniformly provided with a reaction stirring rod (19), and the bottom end of the reactor body (2) is provided with a discharge pipe (20) with a material valve.

8. The insoluble sulfur preparation reactor according to claim 6, characterized in that: The upper port of the three-way control valve (8) on the raw material inlet pipe (5) is connected to the air pump (9) through an air pipe, and the other port of the three-way control valve (8) is connected to the discharge port of the feed pump (10) through a pipe. The air pump (9) and the feed pump (10) are both fixed on the outer side of the vertical plate (11).

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