A preheating stirring device for hydrogen sulfide production

Abstract

This invention discloses a preheating stirring device for hydrogen sulfide production, relating to the field of hydrogen sulfide production technology. It includes a jacket located outside the reactor, through which a heat exchange medium is filled to heat or cool the reactor; a material-turning component for lifting the raw material from the bottom of the reactor and spreading it along the inner wall; and a material-stabilizing rack located on the inner wall of the reactor for supporting the solidified raw material. By incorporating the material-turning component, this invention can pump liquid sulfur from the bottom of the reactor upwards and back down along the inner wall, increasing the contact area between the liquid sulfur and hydrogen during the preparation process and thus improving the reaction rate. After production is completed, the heat flow to the jacket is stopped, allowing the internal temperature of the reactor to gradually decrease. The liquid sulfur continues to be poured onto the inner wall of the reactor in the aforementioned manner, causing it to solidify and adhere to the inner wall, eliminating the need for subsequent continuous heating for preservation.

Description

Technical Field

[0001] This invention relates to the field of hydrogen sulfide production technology, and more specifically to a preheating stirring device for hydrogen sulfide production. Background Technology

[0002] Hydrogen sulfide, as a key chemical raw material, has wide applications in the synthesis of fine organic chemicals and inorganic salts, covering scenarios such as pesticide and pharmaceutical production, metal refining, and the preparation of various industrial reagents. Direct synthesis of hydrogen sulfide from sulfur and hydrogen is the preferred route to obtain high-purity products, and this method is particularly suitable for the preparation of fine chemicals such as methanethiol (as a raw material for methionine synthesis).

[0003] Currently, the synthesis processes are mainly divided into two categories: one involves dissolving liquid sulfur in a specific solvent and then introducing hydrogen gas to react and generate hydrogen sulfide gas; the other involves directly contacting sulfur vapor with hydrogen gas to produce hydrogen sulfide gas. The method of producing hydrogen sulfide by reacting liquid sulfur in a solvent with hydrogen gas initially shows good results, but as the reaction proceeds, the solvent cokes, reducing the reaction rate and making industrial-scale operation difficult.

[0004] To address these issues, existing technologies, such as patent CN102500285B, propose a hydrogen sulfide synthesis apparatus, comprising a sulfur evaporator and a hydrogen sulfide synthesis tower. The sulfur evaporator is equipped with an induction heating device on its outer side and features a sulfur inlet, a hydrogen inlet, and a sulfur vapor and hydrogen mixture outlet. The hydrogen sulfide synthesis tower contains at least two catalyst bed sections and features a sulfur vapor and hydrogen mixture inlet and a synthesis gas outlet. The synthesis gas outlet is located at the bottom of the last section of the catalyst bed. The sulfur evaporator and the hydrogen sulfide synthesis tower are connected via the sulfur vapor and hydrogen mixture outlet and the sulfur vapor and hydrogen mixture inlet. This invention's hydrogen sulfide synthesis apparatus boasts high liquid sulfur evaporation efficiency, easily controllable device temperature, and a high synthesis reaction rate.

[0005] However, in this process, to ensure sufficient hydrogen reaction, an excess of sulfur is often required. This is because hydrogen has low solubility and high reactivity in liquid sulfur. If the amount of sulfur is insufficient, hydrogen can easily escape from the system, resulting in raw material waste and reduced product purity. Furthermore, excess hydrogen itself poses certain safety hazards. After production, the excess sulfur is usually kept warm to prevent solidification. However, this method is costly and requires continuous heating, especially during long production intervals, where prolonged warming consumes a large amount of energy, significantly increasing production costs. Without warming, sulfur will rapidly solidify at the bottom of the reactor. Heating solid sulfur to its melting point (approximately 112.8°C) to liquefy it requires a significant amount of heat energy. In practice, due to sulfur's poor thermal conductivity and its accumulation at the bottom of the reactor, localized overheating or uneven heating can easily occur during heating. This not only affects the sulfur conversion efficiency but may also trigger side reactions, thus impacting subsequent use. Summary of the Invention

[0006] The purpose of this invention is to provide a preheating stirring device for hydrogen sulfide production, so as to solve the problem of high storage costs for excess sulfur after production.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A preheating stirring device for hydrogen sulfide production includes a reactor, a mixing motor, and a stirring rod; it also includes: a jacket disposed outside the reactor, the jacket being filled with a heat exchange medium to heat or cool the reactor; a material tilting component for lifting the raw material from the bottom of the reactor and spreading it along the inner wall of the reactor; and a material stabilizing rack disposed on the inner wall of the reactor for supporting the solidified raw material; the material tilting component includes a transfer cylinder, the top of which is fixedly connected to a splash guard, which is fixedly connected to the top of the inner wall of the reactor. The intermediate drum has several discharge pipes at its bottom. The stirring rod includes a drive rod section and a mixing rod section, which are connected by a flange. The mixing rod section is hollow and has a check valve inside. Each of the discharge pipes has a check valve inside. A distribution plate is fixedly connected to the outer wall of the mixing rod section. Two branch pipes are symmetrically arranged at the bottom of the distribution plate in a figure-eight pattern. A pneumatic system is installed on the splash guard to intermittently provide positive and negative pressure to the intermediate drum.

[0008] By adopting the above technical solution and setting up a material-turning component, liquid sulfur at the bottom of the reactor can be pumped upwards and flowed back downwards along the inner wall of the reactor. During the preparation process, this allows for a larger contact area between the liquid sulfur and hydrogen, thereby increasing the reaction rate. After production is completed, the heat flow to the jacket is stopped, allowing the internal temperature of the reactor to gradually decrease. The liquid sulfur is still poured onto the inner wall of the reactor in the above manner, causing it to solidify and adhere to the inner wall. Subsequent heating and storage are unnecessary; instead, preheating is performed before the next use. Because the solidified sulfur adheres to the inner wall of the reactor, heat can be transferred to the sulfur with a larger contact area during subsequent preheating, resulting in higher preheating efficiency and avoiding the problem of uneven heating during reheating caused by liquid sulfur accumulating at the bottom of the reactor.

[0009] A further improvement of the technical solution of the present invention is as follows: a partition is fixedly connected inside the jacket, which divides the cavity between the jacket and the reactor into two chambers: a side chamber and a bottom chamber. Two valve bodies are fixedly connected at different heights on the outer wall of the jacket. Both valve bodies are connected to the side chamber through pipes, and the sides of the two valve bodies away from the jacket are connected by a U-shaped pipe. A first valve core is rotatably connected between the inner walls of the lower valve body. The bottom of this valve body is connected to the bottom chamber through a pipe, and an output pipe is provided at the top. Two L-shaped holes are centrally symmetrically opened on the first valve core. A second valve core is rotatably connected between the inner walls of the upper valve body. The bottom of this valve body is connected to the side chamber through a pipe, and an upper lead pipe is provided at the top. The rotating shafts of the second valve core and the first valve core are controlled and rotated synchronously by the same electric actuator. A straight hole is opened on the second valve core. An input pipe connected to the bottom chamber is provided on the outer wall of the jacket at a position corresponding to the bottom chamber. Both the input pipe and the output pipe are connected to an external heat source. The height of the partition is higher than the height of the external heat source.

[0010] Using the above technical solution, by setting a partition in the jacket, the jacket is divided into two independent chambers: a side chamber and a bottom chamber. During normal operation, the heat medium is input into the bottom chamber through the input pipe, then flows into the side chamber, and finally flows back to the external heat source supply end through the output pipe. After production is completed, the heat medium in the side chamber is discharged, so that the sulfur passing through the side wall of the reactor is no longer heated, thereby gradually cooling down until solidification. It should be noted that solidification does not occur immediately after the heat medium is discharged, but the above-mentioned material turning operation is continuously carried out after production stops.

[0011] A further improvement of the technical solution of the present invention is that: the material stabilizer includes several skeletons fixedly connected to the inner wall of the reactor, the skeletons are arranged in a ring at equal intervals, the skeletons are set as a U-shaped structure, and several ring baffles are fixedly connected between each skeleton, and the skeletons are made of nickel-based alloy material.

[0012] By adopting the above technical solution, a ring-shaped skeleton is set up so that the skeleton can act as a rib structure during the sulfur solidification process, thereby improving its stability and reducing breakage caused by drying cracks during the sulfur solidification process. During the preheating process, the part that is attached to the inner wall of the reactor melts first and flows downward. The skeleton is made of nickel-based alloy material, which has good corrosion resistance and thermal conductivity. Therefore, it will heat up along with the reactor, causing the sulfur block to gradually separate and eventually fall into the interior of the skeleton. The ring baffle can provide support for the fragments. Under the arc-shaped guidance inside the skeleton, the sulfur block adheres to the inner wall of the reactor, further absorbing heat and melting.

[0013] A further improvement of the technical solution of the present invention is as follows: the inner ring height of the annular baffle is higher than the outer ring height, forming an inwardly inclined slope structure with an inclination angle of 15° to 30°; and the bottom of the outer ring is provided with a downwardly extending skirt, with a gap between the skirt and the inner wall of the reactor; each annular baffle is provided with a notch, and the notches of two adjacent annular baffles are staggered by 120° along the circumference, with a notch angle of 90°; a number of stirring blades are fixedly connected equidistantly along the axial direction on the outer wall of the mixing rod section, and the stirring blades correspond one-to-one with the annular baffles, with the stirring blades located below the corresponding annular baffles, and the length of the stirring blades being less than the inner ring radius of the annular baffles; a hydrogen injection port is provided on the reactor, and the hydrogen injection port is located at the lower part of the reactor.

[0014] By adopting the above technical solution, the annular baffle is configured such that the inner ring is higher than the outer ring, guiding the reactants (such as a mixture of sulfur vapor and hydrogen) to flow from the inner ring to the outer ring along the slope. Combined with the stirring blades, the hydrogen flows in the liquid sulfur in a relatively closed loop.

[0015] A further improvement of the technical solution of the present invention is that: the side wall and bottom of the transfer cylinder are provided with a jacket, and the jacket is filled with a heat-conducting medium. A heater is installed inside the jacket, and a heater is also embedded inside the mixing rod section. The middle part of the discharge pipe is exposed inside the jacket.

[0016] By adopting the above technical solution, a jacket is set on the transfer cylinder and filled with a heat-conducting medium. At the same time, an independent heater is set in the jacket, so that the sulfur in the transfer cylinder will not solidify. The discharge pipe passes directly through the jacket, and the part of the one-way valve installed in the mixing rod section is located in the jacket. This ensures that the one-way valve is always in a high-temperature environment, avoiding jamming or blockage.

[0017] A further improvement of the technical solution of the present invention is as follows: the pneumatic system includes two piston cylinders symmetrically and fixedly connected to both sides of the splash shield. Piston plates are slidably connected between the inner walls of the piston cylinders. Two fixed plates are symmetrically and fixedly connected inside the splash shield. Sliding rods are slidably connected to both fixed plates. A pad is fixedly connected to one end of the sliding rod. The end of the sliding rod away from the pad passes through the fixed plate and is fixedly connected to the piston plate. A spring is sleeved on the outside of the sliding rod and between the pad and the fixed plate. A cam is fixedly connected to the outer wall of the drive rod segment. The cam is in contact with both pads. One piston cylinder is connected to the upper part of the intermediate cylinder through a guide pipe. The other piston cylinder is provided with a suction pipe that communicates with the inside of the reaction vessel. Two filter screens are provided inside the guide pipe, and activated carbon is filled in the cavity between the two filter screens.

[0018] By adopting the above technical solution, a pneumatic system that generates gas pressure by rotating along with the drive rod is directly installed inside the vessel, so that the device does not require an external pump body and avoids gas leakage.

[0019] A further improvement of the technical solution of the present invention is that: an exhaust pipe is also provided on the piston cylinder connected to the suction pipe, the bottom end of the exhaust pipe extends to the lower part of the reaction vessel, and a one-way valve is provided inside both the exhaust pipe and the suction pipe.

[0020] The above technical solution also includes a structure for pumping hydrogen from the upper part of the reactor to the lower part of the reactor, so that hydrogen that escapes to the upper part of the reactor can be continuously sent back to the liquid sulfur for re-reaction during the reaction process.

[0021] A further improvement of the technical solution of the present invention is that: a suction nozzle is fixedly connected to the bottom of the mixing rod section, the suction nozzle has an inverted cone-shaped structure, a flow guide is fixedly connected to the bottom of the mixing rod section, and a flow guide fin is fixedly connected to the outer wall of the flow guide.

[0022] By adopting the above technical solution, a flow guide hood is set at the bottom of the mixing rod section so that when hydrogen is adsorbed near the mixing rod section, it will be guided to move upward and move upward in a spiral motion with the rotation of the flow guide fins. At the same time, the bottom of the mixing rod section is also equipped with an inverted cone-shaped suction nozzle to concentrate the suction of liquid sulfur in the middle of the reactor, thereby reducing the amount of hydrogen intake.

[0023] By adopting the above technical solution, the technical effects achieved by this invention compared to the prior art are as follows: 1. This invention, by setting up a material-turning component, can pump liquid sulfur at the bottom of the reactor upwards and back down along the inner wall of the reactor. During the preparation process, this allows for a larger contact area between the liquid sulfur and hydrogen, thereby increasing the reaction rate. After production is completed, the heat flow to the jacket is stopped, allowing the internal temperature of the reactor to gradually decrease. The liquid sulfur is still poured onto the inner wall of the reactor in the above manner, causing it to solidify and adhere to the inner wall. Subsequent heating and storage are unnecessary; instead, preheating is performed before the next use. Because the solidified sulfur adheres to the inner wall of the reactor, heat can be transferred to the sulfur with a larger contact area during subsequent preheating, resulting in higher preheating efficiency and avoiding the problem of uneven heating during reheating caused by liquid sulfur accumulating at the bottom of the reactor.

[0024] 2. This invention divides the jacket into two independent chambers, a side chamber and a bottom chamber, by setting a partition in the jacket. During normal operation, the heat medium is input into the bottom chamber through the input pipe, then flows into the side chamber, and finally flows back to the external heat source supply end through the output pipe. After production is completed, the heat medium in the side chamber is discharged, so that the sulfur passing through the side wall of the reactor is no longer heated, thereby gradually cooling down until solidification. It should be noted that solidification does not occur immediately after the heat medium is discharged, but the above-mentioned material turning operation is continuously carried out after production stops.

[0025] 3. This invention uses a ring-shaped skeleton to act as a rib structure during sulfur solidification, improving its stability and reducing breakage caused by drying cracks during solidification. During preheating, the parts attached to the inner wall of the reactor melt first and flow downwards. The skeleton is made of nickel-based alloy material, which has good corrosion resistance and thermal conductivity. Therefore, it will heat up along with the reactor, causing the sulfur blocks to gradually separate and eventually fall into the skeleton. The ring-shaped baffle can provide support for the fragments. Under the arc-shaped guidance inside the skeleton, the sulfur blocks adhere to the inner wall of the reactor, further absorbing heat and melting.

[0026] 4. This invention guides the reactants (such as a mixture of sulfur vapor and hydrogen) to flow from the inner to the outer ring along a slope by setting the annular baffle with the inner ring height higher than the outer ring. Combined with the stirring blades, this allows the hydrogen to flow in the liquid sulfur in a relatively closed loop.

[0027] 5. This invention directly installs a pneumatic system inside the reactor that generates gas pressure as the drive rod rotates, eliminating the need for an external pump and preventing gas leakage. It also includes a structure for pumping hydrogen from the upper part of the reactor to the lower part, allowing hydrogen that escapes to the top of the reactor to be continuously returned to the liquid sulfur for further reaction during the reaction process. Attached Figure Description

[0028] The invention will now be further described with reference to the accompanying drawings.

[0029] Figure 1 This is a schematic diagram of the external three-dimensional structure of the present invention; Figure 2 This is a cross-sectional view of the structure from a first perspective of the present invention; Figure 3 This is a cross-sectional view of the structure from a second perspective of the present invention; Figure 4 This is a schematic front sectional view of the present invention; Figure 5 This is a schematic diagram of the mixing rod section of the present invention; Figure 6 This is a schematic diagram of the distribution disk of the present invention; Figure 7 This is a schematic diagram of the structure of the annular baffle of the present invention; Figure 8 This is a schematic diagram of the structure of the air guide shield of the present invention; Figure 9 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 10 For the present invention Figure 2 Enlarged view at point B in the middle; Figure 11 For the present invention Figure 3 Enlarged view of point C in the middle.

[0030] In the diagram: 1. Reactor; 11. Mixing motor; 12. Baffle; 13. Frame; 14. Stirring blade; 2. Jacket; 201. Side cavity; 202. Bottom cavity; 301. Drive rod section; 302. Mixing rod section; 401. Splash shield; 402. Transmission cylinder; 403. Discharge pipe; 404. Distribution plate; 405. Branch pipe; 406. Jacket; 501. Annular baffle; 502. Skirt; 601. Flow guide; 602. Suction nozzle; 603. Flow guide fin 701 Piston cylinder; 702 Conductor pipe; 703 Piston plate; 704 Fixed plate; 705 Slide rod; 706 Pad plate; 707 Spring; 708 Cam; 801 Valve body; 802 Second valve core; 803 First valve core; 804 Straight hole; 805 L-shaped hole; 806 Upper guide pipe; 807 Output pipe; 808 Electric actuator; 810 Input pipe; 811 U-shaped pipe; 901 Intake pipe; 902 Exhaust pipe. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the embodiments. Example 1

[0032] like Figures 1-11As shown, this invention provides a preheating stirring device for hydrogen sulfide production, including a reactor 1, a mixing motor 11, and a stirring rod; it also includes: a jacket 2, disposed outside the reactor 1, which heats or cools the reactor 1 by filling its interior with a heat exchange medium; a material turning component, used to lift the raw material at the bottom of the reactor 1 and spread it along the inner wall of the reactor 1; and a material stabilizing rack, disposed on the inner wall of the reactor 1, used to support the solidified raw material; the material turning component includes a transfer cylinder 402, the top of which is fixedly connected to a splash guard 401, which is fixedly connected to the top of the inner wall of the reactor 1. The bottom of component 2 is provided with several discharge pipes 403. The stirring rod includes a drive rod section 301 and a mixing rod section 302. The drive rod section 301 and the mixing rod section 302 are connected by a flange. The mixing rod section 302 is a hollow structure and is equipped with a one-way valve inside. The discharge pipes 403 are all equipped with one-way valves inside. The outer wall of the mixing rod section 302 is fixedly connected to a distribution plate 404. The bottom of the distribution plate 404 is symmetrically provided with two branch pipes 405, which are arranged in a figure-eight symmetrical pattern. The splash guard 401 is equipped with a pneumatic system, which is used to intermittently provide positive and negative pressure to the central transfer cylinder 402.

[0033] By setting up a material-turning component, the liquid sulfur at the bottom of reactor 1 can be pumped upwards and flowed back downwards along the inner wall of reactor 1. During the preparation process, this allows for a larger contact area between the liquid sulfur and hydrogen, thereby increasing the reaction rate. After production is completed, the heat flow to jacket 2 is stopped, causing the internal temperature of reactor 1 to gradually decrease. The liquid sulfur is still poured onto the inner wall of reactor 1 in the above manner, causing it to solidify on the inner wall. It does not require continuous heating for storage; instead, it is preheated for the next use. Since the sulfur is solidified and adheres to the inner wall of reactor 1, heat can be transferred to the sulfur with a larger contact area during subsequent preheating, resulting in higher preheating efficiency and avoiding the problem of uneven heating during reheating caused by the accumulation of liquid sulfur at the bottom of reactor 1.

[0034] During the production process, the mixing motor 11 is controlled to drive the stirring rod to rotate for mixing. During the process, air is continuously drawn and released into the central transfer cylinder 402 through the pneumatic system (the drawing and filling are intermittent). When drawing air, the central transfer cylinder 402 obtains negative pressure, which causes the one-way valve in the mixing rod section 302 to open, while the one-way valve in the discharge pipe 403 is blocked, so that the central transfer cylinder 402 draws liquid sulfur into the reactor 1 through the hollow structure of the mixing rod section 302. When releasing air, positive pressure is generated in the central transfer cylinder 402. At this time, the one-way valve inside the mixing rod section 302 is blocked, while the one-way valve in the discharge pipe 403 is open, so that the central transfer cylinder 402 squeezes out liquid sulfur through the discharge pipe 403. After passing through the distribution plate 404, it flows from the branch pipe 405 to the inner wall of the reactor 1 and flows down along the inner wall of the reactor 1. Since heating is stopped, liquid sulfur continuously solidifies and adheres to the inner wall of the reactor 1 during the process. It is important to note that during the above process, the bottom of reactor 1 needs to be insulated, while the side walls are not. This allows the sulfur at the bottom to solidify more slowly than the sulfur adhering to the side walls. Because the sulfur preserved in this way remains on the side walls and at the bottom of reactor 1, a perforation exists in the middle of reactor 1. Therefore, the stirring rod can rotate smoothly upon next use, avoiding the problem of sulfur solidification hindering the rotation of the stirring rod.

[0035] In subsequent production processes, the reactor 1 is first heated via jacket 2, including preheating the side walls and bottom of reactor 1. Because sulfur has a large contact area with the side walls and bottom of reactor 1, solid sulfur can melt rapidly, thus improving efficiency upon restarting. Therefore, for long production intervals, continuous heat preservation is unnecessary, reducing the cost of sulfur handling during production breaks. During the melting process, a stabilizing rack provides support, preventing the sulfur blocks adhering to the inner wall of reactor 1 from detaching entirely after melting. Example 2

[0036] like Figure 2 and Figure 3As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, a partition 12 is fixedly connected inside the jacket 2, the partition 12 divides the cavity between the jacket 2 and the reactor 1 into two chambers, a side chamber 201 and a bottom chamber 202. Two valve bodies 801 are fixedly connected at different heights on the outer wall of the jacket 2. Both valve bodies 801 are connected to the side chamber 201 through pipes. The sides of the two valve bodies 801 away from the jacket 2 are connected by a U-shaped pipe 811. A first valve core 803 is rotatably connected between the inner walls of the lower valve body 801. The bottom of the valve body 801 is connected to the bottom chamber 202 through a pipe, and an output pipe 807 is provided at the top. Two L-shaped holes 805 are centrally symmetrically opened on a valve core 803; a second valve core 802 is rotatably connected between the inner walls of the upper valve body 801. The bottom of the valve body 801 is connected to the side cavity 201 through a pipe, and an upper guide pipe 806 is provided on the top. The rotating shafts of the second valve core 802 and the first valve core 803 are controlled and rotated synchronously by the same electric actuator 808. A straight hole 804 is opened on the second valve core 802. An input pipe 810 communicating with the bottom cavity 202 is provided on the outer wall of the jacket 2 corresponding to the position of the bottom cavity 202. Both the input pipe 810 and the output pipe 807 are connected to an external heat source. The height of the partition 12 is higher than the height of the external heat source.

[0037] Since the above process requires extracting liquid sulfur and pouring it onto the inner wall of reactor 1 for solidification, it is necessary to ensure that the bottom of reactor 1 still has a certain temperature after production stops, and the side walls do not need to be insulated. By setting a partition 12 in the jacket 2, the jacket 2 is divided into two independent chambers: a side chamber 201 and a bottom chamber 202. During normal operation, the heat medium is input into the bottom chamber 202 through the input pipe 810, then flows into the side chamber 201, and finally flows back to the external heat source supply end through the output pipe 807. After production is completed, the heat medium in the side chamber 201 is discharged, so that the sulfur passing through the side wall of the reactor 1 is no longer heated, thereby gradually cooling down until solidification. It should be noted that solidification does not occur immediately after the heat medium is discharged, but the above-mentioned material turning operation is continuously carried out after production is stopped.

[0038] The aforementioned electric actuator 808 can be a system consisting of a motor, two driving bevel gears, and two driven bevel gears. The two driving bevel gears are fixedly mounted on the output end of the motor, and the driven bevel gears correspond one-to-one with the driving bevel gears and are meshed together. The two driven bevel gears are respectively mounted on the central shafts of the two valve cores. Alternatively, the electric actuator 808 can be a system of two synchronous pulleys driven by a motor. The two synchronous pulleys are connected by a synchronous belt and are respectively fixedly connected to the central shafts of the two valve cores. The electric actuator 808 can control the synchronous rotation of the two first valve cores 803 and the second valve core 802.

[0039] Reference Figure 3 and Figure 11 During operation, one of the L-shaped holes 805 on the first valve core 803 is directly opposite the side cavity 201 and the bottom cavity 202, respectively, and the other L-shaped hole 805 is directly opposite the output pipe 807 and the U-shaped pipe 811, respectively. The straight hole 804 on the second valve core 802 is directly opposite the side cavity 201 and the U-shaped pipe 811, respectively. The external hot medium enters the bottom cavity 202 through the input pipe 810 and enters the side cavity 201 through one of the L-shaped holes 805 on the first valve core 803, causing the liquid level in the side cavity 201 to rise until it is higher than the height of the straight hole 804 at this time. The hot medium enters the U-shaped pipe 811 through the straight hole 804 and is discharged from the output pipe 807 after passing through the other L-shaped hole 805, and finally flows back to the external heat source, thereby completing the heating of the reactor 1.

[0040] Reference Figure 2 and Figure 10 After production is completed, the external heat source stops supplying heat medium to the input pipe 810. When it is necessary to solidify sulfur along the inner wall of the reactor 1, the electric actuator 808 controls the two valve cores (second valve core 802 and first valve core 803) to rotate synchronously. This causes one of the lower L-shaped holes 805 to face the side cavity 201 and the output pipe 807, and the other L-shaped hole 805 to face the U-shaped pipe 811 and the bottom cavity 202. The upper straight hole 804 faces the upper inlet pipe 806 and the side cavity 201. In this state, the pipeline between the side cavity 201 and the bottom cavity 202 is separated by the second valve core 802. At the same time, the side cavity 201... The upper part is connected to the external environment through a straight hole 804 and an upper inlet pipe 806, and the lower part is connected to the heat source through an L-shaped hole 805 and an outlet pipe 807. The medium inside the side cavity 201 is discharged to the heat source through the L-shaped hole 805 and the outlet pipe 807 under the action of gravity, so that the heat medium in the side cavity 201 gradually decreases until the liquid level is lower than the L-shaped hole 805 directly opposite the side cavity 201, while the heat medium in the bottom cavity 202 is retained, which can continuously keep the bottom of the reactor 1 warm, so that the temperature of the bottom of the reactor 1 is higher than that of the side, and the sulfur on the side wall of the reactor 1 gradually solidifies, while preventing the sulfur at the bottom from solidifying. After continuous operation, the sulfur eventually forms a hollow cylinder with a bottom surface.

[0041] like Figure 4 , Figure 5 and Figure 7 As shown, preferably, the material stabilizer includes several frames 13 fixedly connected to the inner wall of the reactor 1. The frames 13 are arranged in a ring at equal intervals. The frames 13 are set as U-shaped structures, and several ring baffles 501 are fixedly connected between each frame 13. The frames 13 are made of nickel-based alloy material.

[0042] This solution requires the sulfur to be attached to the inner wall of reactor 1 for solidification and storage. However, during subsequent use, once the side wall of reactor 1 is heated, the sulfur in contact with the side wall of reactor 1 will melt rapidly, causing the sulfur block to detach from the inner wall of reactor 1 and fall to the bottom of reactor 1. By setting up a ring-shaped skeleton 13, the skeleton 13 can act as a rib structure during the sulfur solidification process, improving its stability and reducing breakage caused by drying cracks during sulfur solidification. During the preheating process, the part attached to the inner wall of the reactor 1 melts first and flows downward. The skeleton 13 is made of nickel-based alloy material (such as Hastelloy C-276 or Inconel-625), which has good corrosion resistance and thermal conductivity. Therefore, it will heat up along with the reactor 1, causing the sulfur block to gradually separate and eventually fall into the interior of the skeleton 13. The annular baffle 501 can provide support for the fragments. Under the arc-shaped guidance inside the skeleton 13, the sulfur block adheres to the inner wall of the reactor 1, further absorbing heat and melting. Example 3

[0043] like Figure 2 , Figure 4 and Figure 7 As shown, based on Embodiment 2, the present invention provides a technical solution: Preferably, the inner ring height of the annular baffle 501 is higher than the outer ring height, forming an inwardly inclined slope structure with an inclination angle of 15° to 30°; and the bottom of the outer ring is provided with a downwardly extending skirt 502, with a gap between the skirt 502 and the inner wall of the reactor 1; each annular baffle 501 is provided with a notch, and the notches of two adjacent annular baffles 501 are staggered by 120° along the circumference, with a notch angle of 90°; a plurality of stirring blades 14 are fixedly connected equidistantly along the axial direction on the outer wall of the mixing rod section 302, and the stirring blades 14 correspond one-to-one with the annular baffles 501, with the stirring blades 14 located below the corresponding annular baffles 501, and the length of the stirring blades 14 being less than the inner ring radius of the annular baffles 501; a hydrogen injection port is provided on the reactor 1, and the hydrogen injection port is located at the lower part of the reactor 1.

[0044] Because the production process involves injecting hydrogen into liquid sulfur at high temperatures, and hydrogen has a low density, it will quickly rise after being injected into the liquid sulfur and float to the top of reactor 1, making it difficult to mix fully with the liquid sulfur. By setting the annular baffle 501 to have an inner ring height higher than the outer ring (15° to 30° slope), the reactants (such as a mixture of sulfur vapor and hydrogen) are guided to flow from the inner ring to the outer ring along the slope. This, combined with the stirring blade 14, allows hydrogen to flow in liquid sulfur in a relatively closed loop.

[0045] Specifically, when hydrogen flows upward with the stirring to the baffle, it is guided outward along the slope, changing its vertical upward trend and forming an "upward-outward inclined" flow path. Simultaneously, the slope provides slight resistance to the hydrogen, preventing it from rapidly escaping the reaction zone. The annular baffle 501 has a skirt 502 on its outer ring, allowing some hydrogen (especially near the reactor wall) to flow downward through the gap, forming a "sinking outer layer gas" circulation to replenish the hydrogen concentration in the lower reaction zone. After passing through the upper gap, the hydrogen needs to change its horizontal direction to pass through due to the offset position of the lower gap, forcing the gas to increase horizontal diffusion while circulating vertically, forming a complex trajectory of "up-down shuttle + circumferential loop," further reducing the amount of hydrogen overflowing upward. Through these settings, the residence time of hydrogen can be effectively extended, improving reaction efficiency and the degree of reaction completion, and reducing the amount of hydrogen accumulating at the top of the reactor 1.

[0046] like Figure 2 and Figure 9 As shown, preferably, the sidewalls and bottom of the transfer cylinder 402 are provided with a jacket 406, and the jacket 406 is filled with a heat-conducting medium. A heater is installed inside the jacket 406, and a heater is also embedded inside the mixing rod section 302. The middle part of the discharge pipe 403 is exposed inside the jacket 406.

[0047] The original design included multiple one-way valves along the liquid sulfur's path. However, this structure required constant operation and was prone to jamming or even clogging due to sulfur solidification. In this new design, a jacket 406 was installed on the transfer cylinder 402 and filled with a heat-conducting medium. An independent heater was also installed in the jacket 406. This prevented the sulfur in the transfer cylinder 402 from solidifying, and the discharge pipe 403 passed directly through the jacket 406. The one-way valves installed in the mixing rod section 302 were located within the jacket 406, ensuring that the one-way valves were always kept at a high temperature, thus preventing jamming or clogging.

[0048] Preferably, all heaters are resistance heating elements. Specifically, the heater in the mixing rod section 302 is a spiral resistance wire made of special alloy material, wrapped with a high thermal conductivity ceramic insulation layer; the heater in the interlayer 406 is an electric heating tube. Example 4

[0049] like Figure 2 and Figure 9As shown, based on Embodiment 3, the present invention provides a technical solution: Preferably, the pneumatic system includes two piston cylinders 701 symmetrically and fixedly connected to both sides of the splash shield 401. Piston plates 703 are slidably connected between the inner walls of the piston cylinders 701. Two fixing plates 704 are symmetrically and fixedly connected inside the splash shield 401. Sliding rods 705 are slidably connected to both fixing plates 704. One end of the sliding rod 705 is fixedly connected to a pad 706, and the end of the sliding rod 705 away from the pad 706 passes through the fixing plate 704 and is connected to the piston plate 703. 3. Fixed connection: A spring 707 is sleeved on the outside of the slide rod 705 and between the pad 706 and the fixed plate 704. A cam 708 is fixedly connected to the outer wall of the drive rod segment 301. The cam 708 is in contact with both pads 706. One piston cylinder 701 is connected to the upper part of the transfer cylinder 402 through a guide pipe 702. The other piston cylinder 701 is provided with a suction pipe 901 that communicates with the inside of the reaction vessel 1. Two filter screens are provided inside the guide pipe 702, and activated carbon is filled in the cavity between the two filter screens.

[0050] Since the process of extracting liquid sulfur and recirculating it along the inner wall of reactor 1 occurs inside reactor 1, and the reactor itself is under positive pressure during the reaction, if an external pump is used, it will not only need to overcome the pressure inside and outside the reactor to pump the sulfur, but it will also easily cause reactor 1 to leak through this channel. By directly installing a pneumatic system inside the vessel that generates gas pressure as the drive rod section 301 rotates, the device does not require an external pump body, thus avoiding gas leakage. During operation, the drive rod section 301 rotates, causing the cam 708 to rotate and periodically press the pad 706. In conjunction with the spring 707, the pad 706 reciprocates. Through the slide rod 705, the piston plate 703 moves within the piston cylinder 701, thereby continuously pumping and filling the intermediate transfer cylinder 402 through the guide pipe 702. In conjunction with the one-way valves in the mixing rod section 302 and the discharge pipe 403, liquid sulfur is pumped. Example 5

[0051] like Figure 2 and Figure 3 As shown, based on Embodiment 4, the present invention provides a technical solution: preferably, an exhaust pipe 902 is also provided on the piston cylinder 701 connected to the suction pipe 901, the bottom end of the exhaust pipe 902 extends to the lower part of the reaction vessel 1, and a one-way valve is provided inside both the exhaust pipe 902 and the suction pipe 901.

[0052] During the reaction, although an annular baffle 501 was set to optimize the flow path of hydrogen, a small amount of hydrogen will still overflow to the liquid surface and accumulate at the top of the reactor 1, and cannot participate in the reaction. The scheme also includes a structure for pumping hydrogen from the top of the reactor 1 to the bottom of the reactor 1, so that the hydrogen that escapes to the top of the reactor 1 can be continuously sent back to the bottom of the liquid sulfur for re-reaction during the reaction. Specifically, the scheme includes two piston cylinders 701. For the other piston cylinder 701 that is not used to drive the transfer cylinder 402, the inlet end of its connected suction pipe 901 extends to a position near the top of the reactor 1, and the bottom end of the exhaust pipe 902 extends to the lower part of the reactor 1. When the piston plate 703 moves towards the side closer to the slide rod 705, a negative pressure is generated inside the piston cylinder 701, the one-way valve inside the suction pipe 901 is open, and the one-way valve inside the exhaust pipe 902 is blocked, so that the piston cylinder 701 draws in gas into the upper space of the reactor 1, drawing in hydrogen. When the piston plate 703 moves away from the slide rod 705, a positive pressure is generated inside the piston cylinder 701, the one-way valve inside the suction pipe 901 is blocked, and the one-way valve inside the exhaust pipe 902 is open, so that the piston cylinder 701 discharges gas (carrying hydrogen) to the lower part of the reactor 1 through the exhaust pipe 902.

[0053] like Figure 3 and Figure 8 As shown, preferably, a suction nozzle 602 is fixedly connected to the bottom of the mixing rod section 302. The suction nozzle 602 has an inverted cone-shaped structure. A flow guide 601 is fixedly connected to the bottom of the mixing rod section 302. A flow guide fin 603 is fixedly connected to the outer wall of the flow guide 601.

[0054] During the reaction, hydrogen needs to be introduced into the liquid sulfur. The bottom of the mixing rod section 302 continuously absorbs liquid sulfur, and hydrogen inevitably gets drawn in during the process. In this embodiment, a flow guide hood 601 is provided at the bottom of the mixing rod section 302 so that the hydrogen adsorbed near the mixing rod section 302 is guided to move upward and moves spirally upward with the rotation of the flow guide fin 603. At the same time, the bottom of the mixing rod section 302 is also equipped with an inverted cone-shaped suction nozzle 602 to concentrate the absorption of liquid sulfur in the middle of the reactor 1, thereby reducing the amount of hydrogen drawn in.

[0055] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A preheating stirring device for hydrogen sulfide production, comprising a reaction vessel (1), a mixing motor (11), and a stirring rod; characterized in that, Also includes: A jacket (2) is set outside the reactor (1), and the reactor (1) is heated or cooled by filling the jacket with a heat exchange medium. The material turning component is used to lift the raw material at the bottom of the reactor (1) and spread it along the inner wall of the reactor (1); A material stabilizing rack is installed on the inner wall of the reactor (1) to support the solidified raw materials; The material turning component includes a central rotating cylinder (402), the top of which is fixedly connected to a splash guard (401), which is fixedly connected to the top of the inner wall of the reactor (1). Several discharge pipes (403) are provided at the bottom of the central rotating cylinder (402). The stirring rod includes a driving rod section (301) and a mixing rod section (302), which are connected by a flange. The material discharge pipe (403) is hollow and has a one-way valve inside; a one-way valve is installed inside each of the discharge pipes (403); a distribution plate (404) is fixedly connected to the outer wall of the mixing rod section (302), and two branch pipes (405) are symmetrically arranged at the bottom of the distribution plate (404), and the two branch pipes (405) are arranged symmetrically in a figure-eight shape; a pneumatic system is installed on the splash shield (401), and the pneumatic system is used to intermittently provide positive and negative pressure to the transfer cylinder (402); A partition (12) is fixedly connected inside the jacket (2). The partition (12) divides the cavity between the jacket (2) and the reactor (1) into two chambers: a side chamber (201) and a bottom chamber (202). Two valve bodies (801) are fixedly connected at different heights on the outer wall of the jacket (2). Both valve bodies (801) are connected to the side chamber (201) through pipes. The two valve bodies (801) are connected to each other on the side away from the jacket (2) through a U-shaped pipe (811). A first valve core (803) is rotatably connected between the inner walls of the lower valve body (801). The bottom of the valve body (801) is connected to the bottom chamber (202) through a pipe, and an output pipe (807) is provided on the top. The first valve core (803) is centrally symmetrical. Two L-shaped holes (805) are provided; a second valve core (802) is rotatably connected between the inner walls of the valve body (801) located above. The bottom of the valve body (801) is connected to the side cavity (201) through a pipe, and an upper guide pipe (806) is provided at the top. The rotating shafts of the second valve core (802) and the first valve core (803) are controlled and rotated synchronously by the same electric actuator (808). A straight hole (804) is provided on the second valve core (802). An input pipe (810) communicating with the bottom cavity (202) is provided on the outer wall of the jacket (2) corresponding to the position of the bottom cavity (202). The input pipe (810) and the output pipe (807) are both connected to an external heat source. The height of the partition (12) is higher than the height of the external heat source.

2. The preheating stirring device for hydrogen sulfide production according to claim 1, characterized in that: The material stabilizer includes several skeletons (13) that are fixedly connected to the inner wall of the reactor (1). The skeletons (13) are arranged in a ring at equal intervals. The skeletons (13) are set as U-shaped structures, and several ring baffles (501) are fixedly connected between each skeleton (13). The skeletons (13) are made of nickel-based alloy material.

3. A preheating stirring device for hydrogen sulfide production according to claim 2, characterized in that: The inner ring height of the annular baffle (501) is higher than the outer ring height, and it has an inwardly inclined slope structure with an inclination angle of 15° to 30°. The bottom of the outer ring is provided with a downwardly extending skirt (502), and there is a gap between the skirt (502) and the inner wall of the reactor (1). Each annular baffle (501) is provided with a notch, and the notches of two adjacent annular baffles (501) are staggered by 120° along the circumference, with a notch angle of 90°. The outer wall of the mixing rod section (302) is fixedly connected with several stirring blades (14) at equal intervals along the axial direction. The stirring blades (14) correspond one-to-one with the annular baffles (501). The stirring blades (14) are located below the corresponding annular baffles (501). The length of the stirring blades (14) is less than the inner ring radius of the annular baffles (501). The reactor (1) is provided with a hydrogen injection port, which is located at the lower part of the reactor (1).

4. A preheating stirring device for hydrogen sulfide production according to claim 3, characterized in that: The side wall and bottom of the transfer cylinder (402) are provided with a jacket (406), and the jacket (406) is filled with a heat-conducting medium. A heater is installed inside the jacket (406). A heater is also embedded inside the mixing rod section (302). The middle part of the discharge pipe (403) is exposed inside the jacket (406).

5. A preheating stirring device for hydrogen sulfide production according to claim 4, characterized in that: The pneumatic system includes two piston cylinders (701) symmetrically fixedly connected to both sides of the splash shield (401). Piston plates (703) are slidably connected between the inner walls of each piston cylinder (701). Two fixed plates (704) are symmetrically fixedly connected inside the splash shield (401). A slide rod (705) is slidably connected to each of the two fixed plates (704). One end of each slide rod (705) is fixedly connected to a pad (706). The end of the slide rod (705) away from the pad (706) passes through the fixed plate (704) and is fixedly connected to the piston plate (703). The slide rod (705)... A spring (707) is fitted outside and between the pad (706) and the fixed plate (704). A cam (708) is fixedly connected to the outer wall of the drive rod segment (301). The cam (708) is in contact with both pads (706). One of the piston cylinders (701) is connected to the upper part of the transfer cylinder (402) through a guide pipe (702). The other piston cylinder (701) is provided with a suction pipe (901) that communicates with the inside of the reactor (1). The inside of the guide pipe (702) is provided with two filter screens, and the cavity between the two filter screens is filled with activated carbon.

6. A preheating stirring device for hydrogen sulfide production according to claim 5, characterized in that: An exhaust pipe (902) is also provided on the piston cylinder (701) connected to the suction pipe (901). The bottom end of the exhaust pipe (902) extends to the lower part of the reactor (1). Both the exhaust pipe (902) and the suction pipe (901) are equipped with one-way valves.

7. A preheating stirring device for hydrogen sulfide production according to claim 6, characterized in that: The bottom of the mixing rod section (302) is fixedly connected to a suction nozzle (602), which has an inverted cone shape. The bottom of the mixing rod section (302) is fixedly connected to a flow guide (601), and the outer wall of the flow guide (601) is fixedly connected to a flow guide fin (603).

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