Vacuum continuous kettle residue devolatilization recovery system
The vacuum continuous reactor residue devolatilization and recovery system solves the problems of resource waste and high processing costs in reactor residue treatment, and realizes safe and efficient treatment of reactor residue and effective utilization of resources.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-04-14
AI Technical Summary
Existing methods for handling reactor residues suffer from resource waste, high processing costs, and difficulty in controlling the quality of recovered materials. In particular, the flammable and explosive nature of reactor residues increases the difficulty and risk of handling them.
The system employs a vacuum continuous reactor residue devolutation and recovery system, which includes reactor residue pretreatment, a devoluter, a solid material slow cooling and recovery device, and a volatile matter condensation and recovery device. The coordinated operation of each device is controlled by a PLC to achieve safe and efficient treatment of reactor residue.
It achieves safe and efficient treatment of reactor residue, improves resource utilization, reduces processing costs, increases work efficiency, and realizes energy conservation and emission reduction.
Smart Images
Figure CN224113312U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of petrochemical reactor residue recovery and treatment technology, and in particular to a vacuum continuous reactor residue devolatilization recovery system. Background Technology
[0002] The main components of the residue from the fine chemical reactor are residual carbon, tetrahydrofuran, heavy oil components, and a small amount of other impurities. The residue has a relative density of 0.5, is similar to asphalt at room temperature, and softens and volatilizes upon heating. Heating to 100℃ can soften the material into a slurry-like fluid. This residue is flammable, explosive, and low in toxicity, requiring recycling and harmless treatment before discharge. However, due to the complex composition of the residue mixture, it is sensitive to temperature and heating time, making treatment difficult. Currently, there are two main methods for treating this residue: one is to treat it as waste, discharging it after incineration or catalytic oxidation; the other is to extract and recover various volatile components through high-temperature distillation, with the remaining carbon black after high-temperature volatilization also having high economic value. While the first method is simple and easy to implement, it wastes resources and incurs certain treatment costs. The second method is currently not technologically mature, mostly employing intermittent pyrolysis recovery, which has high recovery costs, small processing capacity, and difficulty in controlling the quality of the recovered materials. Summary of the Invention
[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a vacuum continuous reactor residue devolatilization and recovery system that can process reactor residue into materials with application value, save energy and reduce emissions, and has high working efficiency.
[0004] The technical solution adopted in this utility model is:
[0005] A vacuum continuous reactor residue devolatilization and recovery system includes a reactor residue pretreatment device, a devolatilizer, a solid material slow cooling and recovery device, and a volatile matter condensation and recovery device;
[0006] The pretreatment device for reactor residue includes an externally heated pipe, a material tank, and a stirrer; the slurry reactor residue is transported to the material tank through the externally heated pipe, and a heating element is installed on the outer wall of the material tank; the stirrer is installed on the material tank.
[0007] The devolatilizer is a sealed cylindrical structure, installed parallel to the ground. Heating elements are evenly distributed on the outer side of the cylinder. There is a feed inlet at each of the two ends of the devolatilizer, and an electric regulating valve is installed on each of the two feed inlets. The electric regulating valve is connected to the discharge port of the material tank through a pipe. Inside the two ends of the devolatilizer, there are horizontal stirring conveyors corresponding to the two feed inlets. The two stirring conveyors are arranged opposite each other to transfer the material from both ends to the middle of the devolatilizer to the discharge port in the middle of the devolatilizer.
[0008] The solid material slow cooling and recycling device includes an oil cooler, a sealed silo, a water cooler, and a solid silo. The inlet of the oil cooler is connected to the discharge port of the devolatilizer via a screw conveyor, and the outlet of the oil cooler is connected to the inlet of the sealed silo via a screw conveyor. Both the inlet and outlet of the sealed silo are equipped with electric sealing valves. The inlet of the water cooler is connected to the outlet of the sealed silo via a screw conveyor. The outlet of the water cooler is connected to the solid silo via a screw conveyor.
[0009] The volatile matter condensation and recovery device includes a cyclone dust collector, a condenser, a liquid storage tank, a water pump, a vacuum pump, and a cooling water circulation pool. The inlet of the cyclone dust collector is connected to the exhaust port at the top of the volatile matter collector and the exhaust port at the top of the oil cooler, respectively. The exhaust port of the cyclone dust collector is connected to the air inlet of the condenser. The liquid outlet of the condenser is connected to the liquid storage tank. The non-condensable gas outlet is connected to the vacuum pump to discharge the non-condensable gas. The water inlet at the bottom of the condenser is connected to the cooling water circulation pool through the water pump, and the water outlet at the top is connected to the cooling water circulation pool through a pipeline.
[0010] Specifically, the devourer is also equipped with an explosion-proof device.
[0011] Specifically, the shaft ends of the stirring conveyors at both ends of the devourer are connected to a cooling water circulation system.
[0012] Specifically, the cyclone dust collector is equipped with an ash discharge valve at its lower discharge port.
[0013] Specifically, the water chiller is equipped with an exhaust port on its upper part.
[0014] Specifically, the oil cooler and water cooler are respectively connected to the heat transfer oil circulation system and the water circulation cooling system.
[0015] Due to the adoption of the technical solution described above, this utility model has the following advantages:
[0016] This invention forms a complete process system through PLC control. By controlling parameters such as feeding amount, heating temperature, and processing time, the residue in the reactor is ultimately processed into several materials with application value. The equipment structure has a high degree of coordination, which improves processing efficiency and achieves energy saving and emission reduction. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall connection of this utility model.
[0018] In the diagram: 1-Externally heated pipe, 2-Tank, 3-Agitator, 4-Explosion-proof device, 5-Electric regulating valve, 6-Volatile extractor, 7-Cyclone dust collector, 8-Ash discharge valve, 9-Condenser, 10-Liquid storage tank, 11-Water pump, 12-Vacuum pump, 13-Cooling water circulation pool, 14-17-Screw conveyor, 18-Oil cooler, 19-Sealed silo, 20-Sealed valve, 21-Water cooler, 22-Solid silo. Detailed Implementation
[0019] The present invention will be further explained below with reference to the accompanying drawings and embodiments. However, this explanation should not be construed as limiting the scope of protection of the present invention. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.
[0020] Combined with appendix Figure 1 The vacuum continuous reactor residue devolatilization and recovery system shown includes a reactor residue pretreatment device, a devolatilizer 6, a solid material slow cooling and recovery device, and a volatile matter condensation and recovery device.
[0021] The pretreatment device for reactor residue includes an externally heated pipe 1, a material tank 2, and a stirrer 3; the slurry reactor residue is transported to the material tank 2 through the externally heated pipe 1, and a heating element is provided on the outer wall of the material tank 2; the stirrer 3 is installed on the material tank 2.
[0022] The devolatilizer 6 is a sealed cylindrical structure, installed parallel to the ground. Heating elements are evenly distributed on the outer side of the cylinder. There is a feed inlet at each of the two ends of the devolatilizer 6, and an electric regulating valve 5 is installed on each of the two feed inlets. The electric regulating valve 5 is connected to the discharge port of the material tank 2 through a pipe. An explosion-proof device 4 is also installed on the devolatilizer 6. A stirring conveyor is horizontally installed at each end of the devolatilizer 6, corresponding to the two feed inlets. The two stirring conveyors are arranged opposite each other to transfer the material from both ends to the middle discharge port of the devolatilizer 6. A cooling water circulation system is connected to the shaft head of the stirring conveyor at both ends of the devolatilizer 6.
[0023] The solid material slow cooling and recovery device includes an oil cooler 18, a sealed silo 19, a water cooler 21, and a solid silo 22. The inlet of the oil cooler 18 is connected to the discharge port of the devolatilizer 6 via a screw conveyor 14, and the outlet of the oil cooler 18 is connected to the inlet of the sealed silo 19 via a screw conveyor 15. Both the inlet and outlet of the sealed silo 19 are equipped with electric sealing valves 20. The inlet of the water cooler 21 is connected to the outlet of the sealed silo 19 via a screw conveyor 16. The outlet of the water cooler 21 is connected to the solid silo 22 via a screw conveyor 17. An exhaust port is provided on the upper part of the water cooler 21. The oil cooler 18 and the water cooler 21 are respectively connected to a heat transfer oil circulation system and a water circulation cooling system.
[0024] The volatile matter condensation and recovery device includes a cyclone dust collector 7, a condenser 9, a liquid material storage tank 10, a water pump 11, a vacuum pump 12, and a cooling water circulation pool 13. The inlet of the cyclone dust collector 7 is connected to the upper exhaust port of the volatile matter extractor 6 and the upper exhaust port of the oil cooler 18, respectively. The lower discharge port of the cyclone dust collector 7 is equipped with an ash discharge valve 8. The exhaust port of the cyclone dust collector 7 is connected to the air inlet of the condenser 9. The liquid outlet of the condenser 9 is connected to the liquid material storage tank 10, and the non-condensable gas outlet is connected to the vacuum pump 12 to discharge the non-condensable gas. The lower water inlet of the condenser 9 is connected to the cooling water circulation pool 13 through the water pump 11, and the upper water outlet is connected to the cooling water circulation pool 13 through a pipeline.
[0025] In operation, the vacuum continuous reactor residue devolatilization and recovery system of this invention utilizes a PLC for centralized control of each device. First, the slurry-like reactor residue is transported to the material tank 2 via an externally heated pipe 1, ensuring that the material does not cool down or solidify within the pipe during transport. Inside the material tank 2, the material is continuously stirred by a stirrer 3 and simultaneously heated. The material tank 2 is positioned at a high level, with the outlet located at the bottom. The material's feed rate is controlled by an electric regulating valve 5, and it flows into the devolatilizer 6 by gravity. The external heating temperature of the devolatilizer 6 can range from 500℃ to 600℃. During the adjustment, the material enters the cavity through the feed inlets at both ends of the material devolatilizer 6. Under the continuous stirring and pushing of the two stirring conveyors, the material slowly moves towards the center. During the movement, the material is continuously heated and its temperature rises. The volatile substances in the material continuously evaporate into gas, and the volatile gas enters the cyclone dust collector 7 from the exhaust port. Meanwhile, the residual solid material in the devolatilizer 6 slowly moves to the discharge port located in the middle of the devolatilizer 6 and overflows. The residence time of the material in the devolatilizer 6 depends on the actual devolatilization rate and can be achieved by adjusting the rotation speed of the stirring conveyor shaft and the feed rate of the devolatilizer 6.
[0026] The feed inlet of the devourer 6 is connected to the feed inlet of the oil cooler 18 via a screw conveyor 14. The feed inlet of the oil cooler 18 is located at the top front end. As the material passes through the screw conveyor 14, its temperature will decrease due to natural heat dissipation. The oil cooler 18 serves as a slow cooling stage. To avoid damage to the material quality caused by excessively rapid cooling, the material cooling rate must be slow. This is because the thermal conductivity of heat transfer oil is only 1 / 5 to 1 / 8 that of water, and the specific heat capacity of heat transfer oil is only 1 / 5 to 1 / 6 that of water. Therefore, heat transfer oil is chosen as the medium for slow cooling of the material. After the material falls into the oil cooler 18, it slowly moves to the discharge port located at the other end of the oil cooler 18 under the continuous cooling and stirring of the heat exchange plates.
[0027] The discharge port of the oil cooler 18 is connected to the inlet of the sealed silo 19 via the screw conveyor 15. The electric sealing valve 20 on the inlet of the sealed silo 19 controls the time when the material enters the sealed silo 19. An electric sealing valve 20 is installed at the inlet and outlet of the sealed silo 19 respectively. At least one of them is always closed during system operation. The material is discharged by the periodic switching of the sealing valve 20. During the discharge process of the oil cooler 18, the outside atmosphere is prevented from entering the vacuum system.
[0028] The discharge port of the sealed silo 19 is connected to the inlet of the water chiller 21 via a screw conveyor 16. After the material falls into the water chiller 21, it slowly moves to the discharge port at the other end of the water chiller 21 under the continuous cooling and stirring of the heat exchange plates. During the movement, the material gradually cools down to between 45°C and 55°C before being discharged. The discharge port of the water chiller 21 is connected to the solid silo 22 via a screw conveyor 17. The finished material falls into the solid silo 22 by its own weight for storage.
[0029] The volatile gases discharged from the exhaust ports of the volatile matter extractor 6 and the oil cooler 18 are all fed into the cyclone dust collector 7 for dust removal through the gas transmission pipeline. The bottom of the cyclone dust collector 7 is equipped with an ash discharge valve 8. The ash collected by the cyclone dust collector 7 can be discharged periodically through the ash discharge valve 8. The volatile gases after dust removal and purification enter through the air inlet of the condenser 9. After the volatile gases are condensed into liquid, they are introduced into the liquid material storage tank 10 through the liquid outlet of the condenser 9. The remaining non-condensable gases after condensation are discharged through the vacuum pump 12. The condenser 9 is equipped with a circulating cooling water inlet and outlet, and is connected to the cooling water circulation pool 13 by the water pump 11 to cool and condense the volatile gases.
[0030] The parts of this utility model not described in detail are existing technologies.
[0031] The embodiments selected herein for the purpose of disclosing the inventive objectives of this utility model are currently considered appropriate; however, it should be understood that this utility model is intended to include all variations and modifications of the embodiments that fall within the scope of this concept and utility model.
Claims
1. A vacuum continuous reactor residue devolatilization and recovery system, characterized in that, This includes a pretreatment device for reactor residue, a devolatilizer, a solid material slow cooling and recovery device, and a volatile matter condensation and recovery device; The pretreatment device for reactor residue includes an externally heated pipe, a material tank, and a stirrer; the slurry reactor residue is transported to the material tank through the externally heated pipe, and a heating element is installed on the outer wall of the material tank; the stirrer is installed on the material tank. The devolatilizer is a sealed cylindrical structure, installed parallel to the ground. Heating elements are evenly distributed on the outer side of the cylinder. There is a feed inlet at each of the two ends of the devolatilizer, and an electric regulating valve is installed on each of the two feed inlets. The electric regulating valve is connected to the discharge port of the material tank through a pipe. Inside the two ends of the devolatilizer, there are horizontal stirring conveyors corresponding to the two feed inlets. The two stirring conveyors are arranged opposite each other to transfer the material from both ends to the middle of the devolatilizer to the discharge port in the middle of the devolatilizer. The solid material slow cooling and recycling device includes an oil cooler, a sealed silo, a water cooler, and a solid silo. The inlet of the oil cooler is connected to the discharge port of the devolatilizer via a screw conveyor, and the outlet of the oil cooler is connected to the inlet of the sealed silo via a screw conveyor. Both the inlet and outlet of the sealed silo are equipped with electric sealing valves. The inlet of the water cooler is connected to the outlet of the sealed silo via a screw conveyor. The outlet of the water cooler is connected to the solid silo via a screw conveyor. The volatile matter condensation and recovery device includes a cyclone dust collector, a condenser, a liquid storage tank, a water pump, a vacuum pump, and a cooling water circulation pool. The inlet of the cyclone dust collector is connected to the exhaust port on the top of the volatile matter collector and the exhaust port at the top of the oil cooler. The exhaust port of the cyclone dust collector is connected to the air inlet of the condenser. The liquid outlet of the condenser is connected to the liquid storage tank. The non-condensable gas outlet is connected to the vacuum pump to discharge the non-condensable gas. The lower water inlet of the condenser is connected to the cooling water circulation pool through the water pump, and the upper water outlet is connected to the cooling water circulation pool through a pipeline.
2. The vacuum continuous reactor residue devolatilization and recovery system according to claim 1, characterized in that: The devourer is also equipped with an explosion-proof device.
3. The vacuum continuous reactor residue devolatilization and recovery system according to claim 1, characterized in that: The shaft ends of the stirring conveyors at both ends of the devourer are connected to a cooling water circulation system.
4. The vacuum continuous reactor residue devolatilization and recovery system according to claim 1, characterized in that: The cyclone dust collector is equipped with an ash discharge valve at the lower discharge port.
5. The vacuum continuous reactor residue devolatilization and recovery system according to claim 1, characterized in that: The water chiller is equipped with an exhaust port on its upper part.
6. The vacuum continuous reactor residue devolatilization and recovery system according to claim 1, characterized in that: The oil cooler and water cooler are respectively connected to the heat transfer oil circulation system and the water circulation cooling system.