Device for producing solid sulfur flakes by safely utilizing waste sulfur liquid and working method of device

Abstract

The invention discloses a device for safely utilizing waste sulfur liquid to produce solid sulfur flakes and a working method of the device, and belongs to the technical field of sulfur purification processing.The device comprises a sulfur slicing chamber, a discharging port is formed in the bottom end of the right side wall of the sulfur slicing chamber, a frame is installed in the sulfur slicing chamber, and a conveying belt is transversely installed on the frame; the right end of the conveying belt penetrates through the discharging port, an iron roller and a roller driving device are longitudinally installed above the conveying belt on the frame body, and the roller is connected with a cooling device. A rubber sheet is longitudinally hinged to the top end of the discharge port; a sulfur liquid nozzle is mounted above the left of the roller in the sulfur slicing chamber and clings to the roller, the sulfur liquid nozzle is externally connected with a liquid inlet pipe, and a non-metal scraper is arranged below the left of the sulfur liquid nozzle; the non-metal scraper is in contact with the radial peripheral surface of the roller; the sulfur slicing chamber is provided with an exhaust fan, and the exhaust fan is externally connected with a tail gas treatment device through an exhaust pipe; and the liquid inlet pipe is externally connected with a waste sulfur solution oil cooling kettle. The invention has the characteristics of less environmental pollution and safety in use.

Description

Technical Field

[0001] This invention relates to the field of sulfur purification and processing technology, specifically to an apparatus and its working method for safely producing solid sulfur flakes from waste sulfur liquid. Background Technology

[0002] In existing technologies, the purification of waste sulfur often involves evaporating liquid waste sulfur to obtain sulfur vapor, which is then condensed to form solid sulfur. The evaporation temperature of liquid waste sulfur reaches as high as 450 degrees Celsius, and the condensed liquid sulfur reaches temperatures exceeding 160 degrees Celsius. Using water cooling for solid sulfur slicing easily leads to uneven slice thickness, increased surface cracks, and frequent equipment downtime for maintenance. How to continuously cool and solidify large quantities of purified liquid waste sulfur into uniform flake sulfur with minimal environmental pollution, and effectively solve technical bottlenecks such as high-temperature sulfur adhesion, uneven cooling, dust emission, and exhaust gas pollution, is a key problem urgently needing breakthroughs in current industrial applications. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an apparatus and its operating method for safely producing solid sulfur flakes from waste sulfur liquid.

[0004] The technical solution adopted in this invention is as follows.

[0005] An apparatus for safely producing solid sulfur flakes from waste sulfur liquid is characterized by comprising a sulfur flake chamber, a discharge port at the bottom of the right side wall of the sulfur flake chamber, a frame installed inside the sulfur flake chamber, a conveyor belt horizontally installed on the frame, the right end of the conveyor belt passing through the discharge port, an iron roller and a roller drive device vertically installed above the conveyor belt on the frame, the roller having an inner cavity for holding cooling water, the inner cavity being connected to a water tank externally through two water pipes, one of which is equipped with a water pump; a rubber sheet is vertically hinged at the top of the discharge port, the lower edge of the rubber sheet being located outside the sulfur flake chamber and closely adhering to the sulfur layer on the surface of the conveyor belt. A sulfur liquid nozzle is installed close to the upper left of the cylinder in the sulfur slicing chamber. The sulfur liquid nozzle is connected to an inlet pipe. A non-metallic scraper is located on the lower left of the sulfur liquid nozzle. The non-metallic scraper is connected to the sulfur slicing chamber or the frame. The non-metallic scraper is in contact with the radial outer circumference surface of the cylinder and is located on the upper left of the cylinder's central axis and above the conveyor belt. An exhaust fan is installed in the sulfur slicing chamber. The exhaust fan is connected to a tail gas treatment device through an exhaust pipe. The inlet pipe is connected to an oil-cooled cooling vessel for waste sulfur solution. A pump is installed on the inlet pipe.

[0006] Its beneficial effects are as follows: An oil-cooled cooling tank for waste sulfur solution is installed. The purified waste sulfur liquid is first cooled to 130-135℃ in the cooling tank, preventing excessively high sulfur liquid temperature from causing excessively thick film formation, adhesion, or localized melting on the drum surface. Simultaneously, it prevents excessively low temperature from causing nozzle blockage or a sudden drop in flowability. When the waste sulfur solution is sprayed from the nozzle, it comes into contact with the surrounding air, and the vapors volatilized from the sulfur liquid mix with the air to reach a certain proportion. The presence of a non-metallic scraper and timely removal of volatilized vapors can prevent flashover caused by sparks generated from friction between the metal scraper and the drum. This device effectively avoids this problem by controlling the temperature within a suitable range through the oil-cooled cooling tank for waste sulfur solution and by using a non-metallic scraper and exhaust fan.

[0007] The water-cooling system effectively cools the rollers, causing the liquid sulfur sprayed onto their surface to solidify into a layer. This solid sulfur layer is then scraped off by a non-metallic scraper, forming sulfur flakes that fall onto the conveyor belt and are discharged from the outlet. Liquid sulfur is sprayed through nozzles, and the thickness and peel strength of the sulfur film on the roller surface can be adjusted by coordinating the spray speed, roller rotation speed, and cooling temperature gradient. This system offers advantages such as continuous operation, uniform cooling, and adjustable production speed. A blower extracts sulfur-containing dust and volatile impurities generated within the sulfur slicing chamber, transporting them through a duct to an absorption tower for purification. This prevents sulfur dust and impurities from escaping and polluting the environment, protecting the health of operators. A collection hopper collects sulfur particles that fall from the conveyor belt, preventing waste and environmental pollution, and also facilitates the recycling and reuse of spilled sulfur. The device for safely producing solid sulfur flakes from waste sulfur liquid has a compact and reasonable overall structure. All components work together to achieve efficient production of sulfur flakes. Furthermore, it effectively controls the leakage of sulfur dust during the production process, demonstrating good environmental performance and production efficiency.

[0008] As a preferred technical solution, the frame is equipped with bearings at both the front and rear ends above the conveyor belt. These bearings are connected to a longitudinally arranged rotating shaft, which is connected to a drum. The central axis of the drum and the central axis of the rotating shaft are aligned. Blind holes are provided at both the front and rear ends of the rotating shaft. Each blind hole has a liquid passage hole for communicating with the inner cavity of the drum. A mechanically sealed rotary joint is connected to the end of each blind hole on the frame furthest from the other blind hole. The mechanically sealed rotary joint has a water inlet and a cavity communicating with the water inlet. The water inlet of each mechanically sealed rotary joint is connected to a water tank via a water pipe, one of which is equipped with a water pump. The cavity of each mechanically sealed rotary joint communicates with the nearest blind hole on the rotating shaft. Each mechanically sealed rotary joint is connected to the nearest bearing. Cooling water enters the inner cavity of the drum through one mechanically sealed rotary joint and the nearest blind hole on the rotating shaft, then flows into the water tank from the other blind hole on the rotating shaft and the mechanically sealed rotary joint closest to that blind hole. The drum drive device includes a drum drive motor mounted on the frame. A drive wheel is coaxially mounted on the rotating shaft, and the drive wheel is connected to the drum drive motor.

[0009] The mechanical seal rotary joint design ensures a tight seal when cooling water enters and exits the inner cavity of the drum, effectively preventing leakage and guaranteeing stable operation of the water-cooling unit. Its ingenious internal structure and rational layout of the inlet holes and cavities allow for smooth water flow, improving cooling efficiency. Simultaneously, the tight connection between the mechanical seal rotary joint and the bearing enhances the overall stability and durability of the device. Driven by the drum drive unit, the drive wheel rotates the shaft, ensuring uniform cooling of the drum and guaranteeing the continuity and stability of the sulfur slicing process.

[0010] As a preferred technical solution, the roller drive motor is connected to the drive wheel via a first belt.

[0011] As a preferred technical solution, a conveyor belt drive motor is provided on the frame, and the conveyor belt drive motor is connected to the drive wheel of the conveyor belt through a second belt.

[0012] As a preferred technical solution, the rubber sheet is longitudinally connected to the side wall of the discharge port by a hinge; the longitudinal width of the rubber sheet is not less than the longitudinal width of the conveyor belt.

[0013] The rubber sheet forms a movable sealing lip structure to prevent sulfur from leaking out and to create negative pressure in the sulfur cutting chamber.

[0014] As a preferred technical solution, a collection hopper is provided below the outdoor discharge port of the sulfur chips.

[0015] As a preferred technical solution, the non-metallic scraper is fixed to the mounting base at the front end of the frame by bolts, and its cutting edge forms an angle of 15°-25° with the outer surface of the roller.

[0016] It contacts the entire length of the roller axis to uniformly peel off the sulfur slices attached to the roller surface; as a preferred technical solution, a mounting base is connected to the sulfur slice chamber or frame, and a non-metallic scraper is connected to the mounting base; the non-metallic scraper is equipped with a temperature sensor and a pressure sensor.

[0017] As a preferred technical solution, the mounting base is equipped with an adjustment mechanism, which includes a waist-shaped hole arranged in the vertical direction and a locking nut. The contact pressure between the non-metallic scraper blade and the roller surface is adjusted by loosening or tightening the locking nut in the waist-shaped hole.

[0018] The operating method of any of the above-mentioned devices for safely producing solid sulfur flakes from waste sulfur liquid is characterized by comprising the following steps: S1. The purified waste sulfur liquid is cooled to 130-135℃ in a cooling kettle and then pumped to the sulfur liquid nozzle to be evenly sprayed on the outer surface of the rotating drum. S2. The drum rotates at a constant speed of 5-12 r / min under the drive of the drum drive motor. The circulating cooling water in its inner cavity maintains the wall temperature at 45-65℃, so that the sulfur liquid instantly forms a film and solidifies into a sulfur layer with a thickness of 0.8-1.5 mm. S3. The sulfur layer on the radial outer circumference surface of the roller is scraped off by a non-metallic scraper and falls onto the conveyor belt; S4. The sulfur flakes are continuously conveyed to the discharge port by the conveyor belt, and the residual debris is scraped off by the rubber sheet before being discharged. During the above process, the exhaust fan operates simultaneously, drawing the waste gas generated during the sulfur slicing process into the exhaust gas treatment device for purification and emission in compliance with standards. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a preferred embodiment of the apparatus for safely producing solid sulfur flakes from waste sulfur liquid according to the present invention.

[0020] Figure 2 yes Figure 1 A magnified view of part A.

[0021] Figure 3 yes Figure 1 A magnified view of part B.

[0022] Figure 4 yes Figure 3 A magnified view of part D.

[0023] Figure 5 yes Figure 3 A magnified view of part E.

[0024] Figure 6 yes Figure 1 A magnified view of part C.

[0025] Figure 7 This is a schematic diagram of the roller structure.

[0026] Figure 8 yes Figure 7 A magnified view of part F.

[0027] Figure 9 yes Figure 7 A magnified view of part G.

[0028] Figure 10 This is a schematic diagram of a preferred embodiment of the apparatus for safely producing solid sulfur flakes from waste sulfur liquid according to the present invention.

[0029] Figure 11 yes Figure 10 A magnified view of part H.

[0030] Figure 12 yes Figure 10 A magnified view of part I.

[0031] Among them: sulfur slicing chamber-1; discharge port-2; frame-3; Conveyor belt-4; Conveyor belt drive motor-41; Roller-5; Inner cavity-51; 6. Drum drive unit; 7. Sulfur liquid nozzle; Inlet pipe-8; Pump-81; Non-metallic scraper-9; Temperature sensor-90; Mounting base-91; Waist-shaped hole-92; Locking nut-93; Pressure sensor-94; Sulfur liquid-95; Sulfur layer-96; Exhaust fan-10; Exhaust duct-11; Exhaust gas treatment device-12; Water pipe-13; Water tank-14; Water pump-15; Rubber sheet-16; Longitudinal connecting screw-17; Collection hopper-18; Bearing-19; Rotating shaft-20; Blind hole-21; Liquid passage hole-22; Mechanical seal rotary joint-23; Water inlet-24; Cavity-25; Drive wheel-26; Drum drive motor-27; First belt-28. Detailed Implementation

[0032] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0033] Example 1. As... Figure 1-9As shown, an apparatus for safely producing solid sulfur flakes from waste sulfur liquid is characterized by comprising a sulfur flake chamber 1, a discharge port 2 at the bottom of the right side wall of the sulfur flake chamber 1, a frame 3 installed inside the sulfur flake chamber 1, a conveyor belt 4 horizontally installed on the frame 3, the right end of the conveyor belt 4 passing through the discharge port 2, and an iron roller 5 and a roller drive device 6 vertically installed above the conveyor belt 4 on the frame 3.

[0034] The drum 5 is provided with an inner cavity 51 for holding cooling water. The inner cavity 51 is connected to a water tank 14 through two water pipes 13, and a water pump 15 is provided on one of the water pipes 13.

[0035] like Figure 5 As shown, a rubber sheet 16 is longitudinally hinged to the top of the discharge port 2. The lower edge of the rubber sheet 16 is located outside the sulfur slicing chamber 1 and is in close contact with the sulfur layer 96 on the surface of the conveyor belt 4.

[0036] like Figure 2 As shown, a sulfur liquid nozzle 7 is installed close to the upper left of the roller 5 inside the sulfur slicing chamber 1. The sulfur liquid nozzle 7 is connected to an inlet pipe 8. A non-metallic scraper 9 is provided at the lower left of the sulfur liquid nozzle 7. The non-metallic scraper 9 is connected to the sulfur slicing chamber 1 or the frame 3. The non-metallic scraper 9 is in contact with the radial outer circumferential surface of the roller 5 and is located at the upper left of the central axis of the roller 5 and above the conveyor belt 4.

[0037] The sulfur slicing chamber 1 is equipped with an exhaust fan 10, which is connected to an external exhaust gas treatment device 12 via an exhaust pipe 11; the liquid inlet pipe 8 is connected to an external waste sulfur solution oil-cooled cooling vessel 82; and a pump 81 is installed on the liquid inlet pipe 8.

[0038] like Figure 3-5 , Figure 7-9As shown, the frame 3, located above the conveyor belt 4, has bearings 19 at its front and rear ends. The two bearings 19 are connected to a longitudinally arranged rotating shaft 20, which is connected to a drum 5. The central axis of the drum 5 and the central axis of the rotating shaft 20 are on the same straight line. Blind holes 21 are provided at both the front and rear ends of the rotating shaft 20. Each blind hole 21 has a liquid passage hole 22 for communicating with the inner cavity 51 of the drum 5. A mechanically sealed rotary joint 23 is connected to the end of each blind hole 21 away from the other blind hole 21. The mechanically sealed rotary joint 23 has a water inlet hole 24 and a cavity 25 communicating with the water inlet hole 24. Each mechanical... The water inlet 24 of the sealed rotary joint 23 is connected to the water tank 14 via a water pipe 13, and a water pump 15 is installed on one of the water pipes 13. The cavity 25 of each mechanical seal rotary joint 23 is connected to the nearest blind hole 21 on the rotating shaft 20. Each mechanical seal rotary joint 23 is connected to the nearest bearing 19. Cooling water enters the inner cavity 51 of the drum 5 through a mechanical seal rotary joint 23 and the nearest blind hole 21 on the rotating shaft 20, and then flows into the water tank 14 from another blind hole 21 on the rotating shaft 20 and the mechanical seal rotary joint 23 closest to the blind hole 21. The drum drive device 6 includes a drum drive motor 27 mounted on the frame 3. A drive wheel 26 is coaxially mounted on the rotating shaft 20, and the drive wheel 26 is connected to the drum drive motor 27.

[0039] The mechanical seal rotary joint 23 ensures the sealing of cooling water as it enters and exits the inner cavity 51 of the drum 5, effectively preventing leakage and thus guaranteeing the stable operation of the water-cooling device. Its ingenious internal structure and the rational layout of the inlet hole 24 and cavity 25 allow for smooth water flow, improving cooling efficiency. Simultaneously, the tight connection between the mechanical seal rotary joint 23 and the bearing 19 enhances the overall stability and durability of the device. Driven by the drum drive device 6, the drive wheel 26 rotates the shaft 20, ensuring uniform cooling of the drum 5 and guaranteeing the continuity and stability of the sulfur slicing process.

[0040] The roller drive motor 27 is connected to the drive wheel 26 via the first belt 28.

[0041] like Figure 6 As shown, a conveyor belt drive motor 41 is provided on the frame 3, and the conveyor belt drive motor 41 is connected to the drive wheel 43 of the conveyor belt through a second belt 42.

[0042] The rubber sheet 16 is hinged to the side wall of the discharge port 2 via a longitudinal connecting hinge 17; the longitudinal width of the rubber sheet 16 is not less than the longitudinal width of the conveyor belt.

[0043] The rubber sheet forms a movable sealing lip structure to prevent sulfur from leaking out and to create negative pressure inside the sulfur slicing chamber 1.

[0044] The rubber sheet 16 is made of elastic heat-resistant rubber material, specifically fluororubber, with a temperature range of -20℃ to 200℃ and a hardness of 50 Shore A, ensuring good resilience and sealing performance even under high-temperature sulfur contact.

[0045] A collection hopper 18 is provided below the discharge port 2 of the sulfur slicing chamber 1.

[0046] The non-metallic scraper 9 is fixed to the mounting base at the front end of the frame 3 by bolts, and its cutting edge forms a 15° angle with the outer surface of the roller 5.

[0047] The scraper 9 makes full-length contact along the axial direction of the roller 5, uniformly peeling away sulfur slices adhering to the surface of the roller 5. The non-metallic scraper 9 is made of wear-resistant material, specifically polytetrafluoroethylene (PTFE), which has excellent wear resistance and self-lubricating properties, reducing friction with the roller surface, extending the scraper's service life, and preventing contamination of the sulfur slices. The cutting edge is precision-ground, with a surface roughness controlled below Ra0.2, ensuring uniform sulfur slice thickness during scraping and reducing defective products. The mounting base features a detachable design, facilitating regular inspection or replacement of the scraper. Maintenance simply requires loosening the fixing bolts to remove the entire scraper assembly, making operation quick and easy. A guide groove is also provided in the contact area between the scraper and the sulfur slices to promptly discharge any small amount of debris generated during scraping, preventing debris accumulation from affecting the scraping effect.

[0048] The blade is 8mm thick and mirror-polished with a surface roughness Ra≤0.8μm to reduce frictional resistance and prevent sulfur from sticking.

[0049] A mounting base 91 is connected to the sulfur slicing chamber 1, and a non-metallic scraper 9 is connected to the mounting base 91.

[0050] The operating method of the apparatus for safely producing solid sulfur flakes from waste sulfur liquid is characterized by comprising the following steps: S1. The purified waste sulfur liquid is cooled to 130°C in a cooling kettle 82 and then pumped to sulfur liquid nozzle 7 by pump 81, and sprayed evenly on the outer surface of rotating drum 5. S2. The drum 5 rotates at a constant speed of 5 r / min under the drive of the drum drive motor 27. The circulating cooling water in its inner cavity 51 maintains the wall temperature at 45℃, so that the sulfur liquid instantly forms a film and solidifies into a sulfur layer 96 with a thickness of 0.8 mm. S3. The sulfur layer 96 on the radial outer circumference surface of the roller 5 is scraped off by the non-metallic scraper 9 and falls onto the conveyor belt; S4. The sulfur flakes are continuously conveyed to the discharge port 2 by the conveyor belt, and the residual debris is scraped off by the rubber sheet 16 before being discharged. During the above process, the exhaust fan 10 operates synchronously, and the exhaust pipe 11 containing waste gas generated during the sulfur slicing process is introduced into the tail gas treatment device 12 for purification and emission in compliance with standards.

[0051] Its beneficial effects are as follows: An oil-cooled cooling vessel 82 for waste sulfur solution is installed. The purified waste sulfur liquid is first cooled to 130℃ in the cooling vessel 82, preventing excessively high sulfur liquid temperature from causing excessively thick film formation, adhesion, or localized melting on the roller surface. Simultaneously, it prevents excessively low temperature from causing nozzle blockage or a sudden drop in flowability. When the waste sulfur solution is sprayed from the nozzle, it comes into contact with the surrounding air, and the vapors volatilized from the sulfur liquid mix with the air to a certain proportion. The presence of a non-metallic scraper 9 and the timely removal of volatilized vapors prevents flashover caused by sparks that may be generated from friction between the metal scraper and the roller. This device effectively avoids this problem by controlling the temperature within a suitable range through the oil-cooled cooling vessel for waste sulfur solution and by using the non-metallic scraper 9 and the exhaust fan. Before slicing the liquid sulfur, cooling it to 130-135℃ prevents the release of small amounts of high-temperature gas from the condenser 4 due to continuous production, thus preventing flashover when it encounters air in the sulfur slicing chamber. The water-cooling device effectively cools the roller 5, causing the liquid sulfur sprayed onto its surface to cool and form a solid sulfur layer. This solid sulfur layer is then scraped off by a non-metallic scraper 9, forming sulfur flakes that fall onto the conveyor belt 4 and are discharged from the outlet 2. Liquid sulfur is sprayed through the sulfur nozzle 7. The thickness and peel strength of the sulfur layer on the roller 5 surface can be adjusted by coordinating the spraying speed, roller rotation speed, and cooling temperature gradient, allowing for continuous operation and adjustable production speed. A blower extracts sulfur-containing dust and volatile impurities generated in the sulfur slicing chamber 1, transporting them through the exhaust pipe 11 to an absorption tower for purification, preventing sulfur dust and impurities from spilling and polluting the environment, and protecting the health of operators. The collection hopper 18 collects sulfur particles falling from the conveyor belt 4, preventing them from falling to the ground and causing waste and environmental pollution, while also facilitating the recycling and reuse of the spilled sulfur. The device for safely producing solid sulfur flakes from waste sulfur liquid has a compact and reasonable overall structure. All components work together to achieve efficient production of sulfur flakes. Furthermore, it effectively controls the leakage of sulfur dust during the production process, demonstrating good environmental performance and production efficiency.

[0052] Example 2. (As shown) Figure 10-12 As shown, this embodiment differs from Embodiment 1 in that the mounting base 91 is equipped with an adjustment mechanism, which includes a waist-shaped hole 92 arranged vertically and a locking nut 93. The contact pressure between the cutting edge of the non-metallic scraper 9 and the surface of the roller 5 is adjusted by tightening or loosening the locking nut within the waist-shaped hole. The non-metallic scraper 9 is fixed to the mounting base at the front end of the frame 3 by bolts, and its cutting edge forms a 25° angle with the outer surface of the roller 5. The non-metallic scraper 9 is equipped with a temperature sensor 90 and a pressure sensor 94.

[0053] Specifically, fluororubber or silicone rubber is selected, with a temperature range of -20℃ to 200℃ and a hardness of 70 Shore A, to ensure good resilience and sealing performance even under high-temperature sulfur contact.

[0054] The non-metallic scraper 9 is made of a wear-resistant material, specifically... The cutting edge is made of polytetrafluoroethylene or high molecular weight polyethylene with a thickness of 12mm. The cutting edge is mirror polished with a surface roughness Ra≤0.8μm to reduce frictional resistance and prevent sulfur from sticking.

[0055] The operating method of the apparatus for safely producing solid sulfur flakes from waste sulfur liquid is characterized by comprising the following steps: S1. The purified waste sulfur liquid is cooled to 135°C in a cooling kettle 82 and then pumped to sulfur liquid nozzle 7 by pump 81, and sprayed evenly on the outer surface of rotating drum 5. S2. The drum 5 rotates at a constant speed of 12 r / min under the drive of the drum drive motor 27. The circulating cooling water in its inner cavity 51 maintains the wall temperature at 65℃, so that the sulfur liquid instantly forms a film and solidifies into a sulfur layer 96 with a thickness of 1.5 mm. S3. The sulfur layer 96 on the radial outer circumference surface of the roller 5 is scraped off by the non-metallic scraper 9 and falls onto the conveyor belt; S4. The sulfur flakes are continuously conveyed to the discharge port 2 by the conveyor belt, and the residual debris is scraped off by the rubber sheet 16 before being discharged. During the above process, the exhaust fan 10 operates synchronously, and the exhaust pipe 11 containing waste gas generated during the sulfur slicing process is introduced into the tail gas treatment device 12 for purification and emission in compliance with standards.

Claims

1. An apparatus for safely producing solid sulfur flakes from waste sulfur liquid, characterized in that: The device includes a sulfur slicing chamber. A discharge port is located at the bottom of the right side wall of the sulfur slicing chamber. A frame is installed inside the sulfur slicing chamber, and a conveyor belt is horizontally mounted on the frame. The right end of the conveyor belt passes through the discharge port. An iron roller and a roller drive device are vertically mounted above the conveyor belt on the frame. The roller has an inner cavity for holding cooling water, which is connected to a water tank via two water pipes. One of the water pipes is equipped with a water pump. A rubber sheet is vertically hinged to the top of the discharge port, with its lower edge located outside the sulfur slicing chamber and in close contact with the surface of the conveyor belt. The sulfur layer is located on the upper left side of the cylinder in the sulfur slicing chamber. A sulfur liquid nozzle is installed close to the cylinder, and an inlet pipe is connected to the outside of the sulfur liquid nozzle. A non-metallic scraper is located on the lower left side of the sulfur liquid nozzle and is connected to the sulfur slicing chamber or the frame. The non-metallic scraper is in contact with the radial outer circumference surface of the cylinder and is located on the upper left side of the cylinder's central axis and above the conveyor belt. An exhaust fan is installed in the sulfur slicing chamber, and the exhaust fan is connected to a tail gas treatment device through an exhaust pipe. The inlet pipe is connected to an oil-cooled cooling kettle for waste sulfur solution. A pump is installed on the inlet pipe.

2. The apparatus for safely producing solid sulfur flakes from waste sulfur liquid as described in claim 1, characterized in that: The frame is equipped with bearings at both the front and rear ends above the conveyor belt. These bearings are connected to a longitudinally arranged rotating shaft, which is connected to a drum. The central axis of the drum and the central axis of the rotating shaft are aligned. Blind holes are located at both the front and rear ends of the rotating shaft. Each blind hole has a liquid passage for communicating with the inner cavity of the drum. A mechanically sealed rotary joint is connected to the end of each blind hole on the frame furthest from the other blind hole. The mechanically sealed rotary joint has a water inlet and a cavity communicating with the water inlet. The water inlet of each mechanically sealed rotary joint is connected to a water tank via a water pipe, one of which is equipped with a water pump. The cavity of each mechanically sealed rotary joint communicates with the nearest blind hole on the rotating shaft. Each mechanically sealed rotary joint is connected to the nearest bearing. Cooling water enters the inner cavity of the drum through one mechanically sealed rotary joint and the nearest blind hole on the rotating shaft, then flows into the water tank from the other blind hole on the rotating shaft and the mechanically sealed rotary joint closest to that blind hole. The roller drive device includes a roller drive motor mounted on the frame; a drive wheel is coaxially mounted on the rotating shaft and connected to the roller drive motor.

3. The apparatus for safely producing solid sulfur flakes from waste sulfur liquid as described in claim 2, characterized in that: The roller drive motor is connected to the drive wheel via a first belt.

4. The apparatus for safely producing solid sulfur flakes from waste sulfur liquid as described in claim 1, characterized in that: The frame is equipped with a conveyor belt drive motor, which is connected to the drive wheel of the conveyor belt via a second belt.

5. The apparatus for safely producing solid sulfur flakes from waste sulfur liquid as described in claim 1, characterized in that: The rubber sheet is longitudinally connected to the side wall of the discharge port by a hinge; the longitudinal width of the rubber sheet is not less than the longitudinal width of the conveyor belt.

6. The apparatus for safely producing solid sulfur flakes from waste sulfur liquid as described in claim 1, characterized in that: A collection hopper is installed below the outlet of the sulfur chipper.

7. The apparatus for safely producing solid sulfur flakes from waste sulfur liquid as described in claim 1, characterized in that: The non-metallic scraper is fixed to the mounting base at the front end of the frame by bolts, and its cutting edge forms an angle of 15°-25° with the outer surface of the roller.

8. The apparatus for safely producing solid sulfur flakes from waste sulfur liquid as described in claim 1, characterized in that: The sulfur slicing chamber or frame is connected to a mounting base, and a non-metallic scraper is connected to the mounting base; the non-metallic scraper is equipped with a temperature sensor and a pressure sensor.

9. The apparatus for safely producing solid sulfur flakes from waste sulfur liquid as described in claim 1, characterized in that: The mounting base is equipped with an adjustment mechanism, which includes a waist-shaped hole arranged in the vertical direction and a locking nut. The contact pressure between the non-metallic scraper blade and the roller surface is adjusted by loosening or tightening the locking nut in the waist-shaped hole.

10. The operating method of the apparatus for safely producing solid sulfur flakes from waste sulfur liquid as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. The purified waste sulfur liquid is cooled to 130-135℃ in a cooling kettle and then pumped to the sulfur liquid nozzle to be evenly sprayed on the outer surface of the rotating drum. S2. The drum rotates at a constant speed of 5-12 r / min under the drive of the drum drive motor. The circulating cooling water in its inner cavity maintains the wall temperature at 45-65℃, so that the sulfur liquid instantly forms a film and solidifies into a sulfur layer with a thickness of 0.8-1.5 mm. S3. The sulfur layer on the radial outer circumference surface of the roller is scraped off by a non-metallic scraper and falls onto the conveyor belt; S4. The sulfur flakes are continuously conveyed to the discharge port by the conveyor belt, and the residual debris is scraped off by the rubber sheet before being discharged. During the above process, the exhaust fan operates simultaneously, drawing the waste gas generated during the sulfur slicing process into the exhaust gas treatment device for purification and emission in compliance with standards.

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