Low-temperature evaporation device for continuous drying and deslagging

Abstract

The utility model provides a kind of continuous drying discharging residue's low-temperature evaporation device, can solve the problem that low-temperature drying equipment cannot continuously discharge residue, improve residue handling capacity, can be fully stirred to material, improve evaporation effect;Including screw conveyor, several evaporation stills, evaporation still is connected on cylinder by unloading valve, vacuum valve is mounted on cylinder, and discharge port is equipped in the delivery end of cylinder;Each evaporation still includes kettle body, drive motor mounted on kettle body, drive shaft is arranged in cylinder, drive motor is connected with drive shaft, and the upper and lower ends of drive shaft are both equipped with connecting rod, and the connecting rod between the upper and lower ends is connected with the scraping plate that touches the inner wall of kettle body, spiral stirring paddle is mounted on drive shaft in axial direction, stirring rod is mounted on drive shaft between the upper and lower adjacent blades of spiral stirring paddle, stirring rod end is equipped with stirring block, and the arrangement direction of stirring rod is same with the spiral direction of paddle blade of same side spiral stirring paddle.

Description

Technical Field

[0001] This utility model relates to the field of low-temperature drying equipment technology, specifically a low-temperature evaporation device for continuous drying and slag discharge. Background Technology

[0002] Commercially available low-temperature drying equipment requires breaking the vacuum after the customer's product / wastewater enters the equipment and meets the treatment requirements, followed by material / slag discharge. After completion, the slag discharge port is closed, and the process of liquid inlet, preheating, vacuuming, evaporation, and slag discharge is repeated. This is not a continuous drying and slag discharge process. With several slag discharges per day, about 2 hours are wasted in the unloading process, which compresses the evaporation time. Breaking the vacuum also causes system cooling and energy waste, reducing the daily processing capacity. In addition, the single type of stirring paddle in the evaporator prevents the material from being fully stirred, thus affecting the evaporation effect. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a low-temperature evaporation device for continuous drying and slag discharge, which can solve the problem of low-temperature drying equipment not being able to continuously discharge slag, increase the slag discharge capacity, and fully stir the material to improve the evaporation effect.

[0004] This utility model adopts the following technical solution: a low-temperature evaporation device for continuous drying and slag discharge, comprising a screw conveyor and several evaporation kettles evenly arranged on the upper side of its cylinder along the conveying direction of the screw conveyor. The evaporation kettles are connected to the cylinder through a discharge valve. The cylinder is equipped with a vacuum valve and a slag discharge port is provided at the conveying end of the cylinder. Each evaporation kettle includes a kettle body, a drive motor mounted on the kettle body, and a drive shaft disposed inside the cylinder. The drive motor is connected to the drive shaft. Connecting rods are mounted at both the upper and lower ends of the drive shaft. A scraper that scrapes against the inner wall of the kettle body is connected between the connecting rods at the upper and lower ends. A spiral stirring paddle is mounted axially on the drive shaft. A stirring rod is mounted on the drive shaft between the upper and lower adjacent blades of the spiral stirring paddle. A stirring block is mounted at the end of the stirring rod. The arrangement direction of the stirring rod is the same as the spiral direction of the blades of the spiral stirring paddle on the same side.

[0005] Furthermore, the connecting rods at the upper and lower ends are arranged in parallel, and there are two scrapers. The connecting rods and the scrapers form a frame shape around each other, and the spiral stirring paddle and stirring rod are arranged within the frame-shaped area. Furthermore, a honeycomb jacket is spirally arranged around the outer wall of the vessel, and the honeycomb jacket is connected to a heating medium circulation pipeline, and a control valve for temperature regulation is provided on the circulation pipeline; Furthermore, the stirring rod and the blades of the spiral stirring paddle on the same side have the same tilt angle, and the tilt angle is 15°~70°; Furthermore, a dispersion slurry is mounted on the drive shaft located below the frame-shaped area. The dispersion slurry is in the shape of an inverted trapezoid and includes a plurality of connecting rods connected to the drive shaft from top to bottom. The length of the connecting rods decreases from top to bottom, and the ends of the plurality of connecting rods are connected to a dispersion rod. Furthermore, the pressure inside the cylinder after being evacuated by the vacuum valve is -99kPa to -90kPa, and the atmospheric pressure inside the cylinder is -101.325kPa; Furthermore, the dispersing rod is equipped with a scraper, which scrapes against the inner wall of the vessel. Furthermore, a support rod is connected between the stirring rods on the same side, and a dispersing block is mounted on the support rod, with a gap between the dispersing block and the scraper.

[0006] The beneficial effects of this utility model are that by setting up several evaporation kettles evenly arranged on the upper side of the cylinder along the conveying direction of the screw conveyor, the evaporation kettles are connected to the cylinder through discharge valves, and the cylinder is equipped with a vacuum valve. The processed material in the evaporation kettle can enter the screw conveyor by opening the discharge valve and then closing the discharge valve, which can isolate the vacuum between the screw conveyor and the evaporation kettle. The material can return to normal pressure after entering the screw conveyor, and then be conveyed by the screw until it is discharged through the slag discharge port. This can achieve continuous drying and slag discharge, increase the evaporation time, avoid energy loss after vacuum breaking, and increase the daily processing capacity. At the same time, the evaporation kettle is equipped with multiple sets of stirring elements, which can fully stir the material and improve the evaporation effect, thus having good economic value. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the assembly structure of this utility model; Figure 2 This is a schematic diagram of the evaporation vessel in this utility model. Detailed Implementation

[0008] like Figure 1 , Figure 2As shown, this utility model discloses a low-temperature evaporation device for continuous drying and slag discharge, comprising a screw conveyor 1 and several evaporation kettles 2 evenly arranged on the upper side of the cylinder 4 along the conveying direction of the screw conveyor 1. The evaporation kettles 2 are connected to the cylinder 4 through a discharge valve 3. The cylinder 4 is equipped with a vacuum valve 5, and a slag discharge port 6 is provided at the conveying end of the cylinder 4. Each evaporation kettle 2 includes a kettle body 7, a drive motor 8 mounted on the kettle body 7, and a drive shaft 9 disposed inside the cylinder 4. The drive shaft 9 can rotate in both directions; rotating in reverse pushes the material downwards, while rotating in the forward direction flips the material upwards (accelerating the evaporation speed). The drive motor 8 is connected to the drive shaft 9, and connecting rods 10 are installed at both the upper and lower ends of the drive shaft 9. A scraper 11 is connected between the connecting rods 10 to scrape the inner wall of the vessel 7, which helps to scrape the material from the inner wall of the vessel 7 and prevent accumulation. A spiral stirring paddle 12 is mounted on the drive shaft 9 along the axial direction. A stirring rod 13 is mounted on the drive shaft 9 between the upper and lower adjacent blades of the spiral stirring paddle 12. A stirring block 14 is mounted at the end of the stirring rod 13. The arrangement direction of the stirring rod 13 is the same as the spiral direction of the blades of the spiral stirring paddle 12 on the same side. For example, if the blades of the spiral stirring paddle 12 are tilted to the left, then the arrangement direction of the stirring rod 13 is the same as the tilt direction of the blades on the same side. That is, the tilt angle of the stirring rod 13 and the blades of the spiral stirring paddle 12 on the same side is the same, and the tilt angle is 30°.

[0009] The connecting rods 10 at the top and bottom are arranged in parallel, and there are two scrapers 11. The connecting rods 10 and scrapers 11 surround each other to form a frame shape. The spiral stirring paddle 12 and stirring rod 13 are arranged in the frame-shaped area.

[0010] A dispersion slurry 15 is mounted on the drive shaft 9 located below the frame-shaped area. The dispersion slurry 15 is in the shape of an inverted trapezoid. The dispersion slurry 15 includes a number of connecting rods 16 connected to the drive shaft 9 from top to bottom. The length of the connecting rods 16 decreases from top to bottom. The ends of the connecting rods 16 are connected to the dispersion rods 17.

[0011] The outer wall of the vessel body 7 is spirally surrounded by a honeycomb jacket 18, which is connected to a heating medium circulation pipeline 19. A control valve 20 for temperature regulation is installed on the circulation pipeline 19. The pressure inside the cylinder 4 after being evacuated by the vacuum valve 5 is -99kPa to -90kPa, and the atmospheric pressure inside the cylinder 4 is -101.325kPa. The dispersing rod 17 is equipped with a scraper 21. The scraper 21 scrapes against the inner wall of the vessel body 7, which can further scrape out the material on the lower inner wall of the vessel body 7 to avoid accumulation. Both the scraper 11 and the scraper 21 can be made of rubber to avoid damaging the inner wall of the vessel body 7.

[0012] A support rod 22 is connected between the stirring rods 13 on the same side. A dispersing block 23 is mounted on the support rod 22. The dispersing block can also be replaced by a scraper. The material can be further stirred and dispersed through the support rod 22 and the dispersing block 23, thereby improving the evaporation effect.

[0013] In this invention, a screw conveyor 1 and an evaporator 2 are connected by a discharge valve 3. Multiple evaporator 2s are connected in parallel. The screw conveyor 1 can be customized and lengthened according to the processing capacity, thus forming standardized products with multiple processing capacity specifications. The working principle of this invention is as follows: the evaporator 2 is evacuated, the material is fed into the vessel body 7, and steam or heat medium is introduced into the honeycomb jacket 18 through the circulation pipe 19. The material in the vessel body 7 begins to evaporate. During evaporation, the drive motor 8 drives the drive shaft 9 to rotate, and the evaporation is accelerated by forward or reverse rotation. The spiral stirring paddle 12, stirring rod 13 and its end stirring block 14, dispersion slurry 15, connecting rod 10 and its scraper 11 work together. The material inside the vessel 7 can be thoroughly stirred to improve the evaporation effect. After the drying requirements are met, the dispersion slurry 15 can not only thoroughly stir the material but also help push the material downward. Then, the discharge valve 3 is opened, and the material enters the screw conveyor 1. After that, the discharge valve 3 is closed to isolate the vacuum between the two devices. After the material enters the screw conveyor 1, the vacuum valve 5 restores the normal pressure state inside the cylinder 4, and the slag discharge port 6 is opened. The screw conveyor 1 can push the material to the slag discharge port 6 for discharge. In summary, this utility model realizes continuous drying and slag discharge, increases the evaporation time, avoids energy loss after vacuum breaking, increases the daily processing capacity under the same heat exchange performance specifications, and can thoroughly stir the material to improve the evaporation effect.

[0014] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0015] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-temperature evaporation device for continuous drying and slag discharge, characterized in that: The system includes a screw conveyor and several evaporation kettles evenly arranged on the upper side of its cylindrical body along the conveying direction of the screw conveyor. The evaporation kettles are connected to the cylindrical body through discharge valves. The cylindrical body is equipped with a vacuum valve and a slag discharge port is provided at the conveying end of the cylindrical body. Each evaporation kettle includes a kettle body, a drive motor mounted on the kettle body, and a drive shaft disposed inside the cylindrical body. The drive motor is connected to the drive shaft. Both ends of the drive shaft are equipped with connecting rods. A scraper that scrapes against the inner wall of the kettle body is connected between the connecting rods at the upper and lower ends. A spiral stirring paddle is mounted axially on the drive shaft. A stirring rod is mounted on the drive shaft between the upper and lower adjacent blades of the spiral stirring paddle. A stirring block is mounted at the end of the stirring rod. The arrangement direction of the stirring rod is the same as the spiral direction of the blades of the spiral stirring paddle on the same side.

2. The low-temperature evaporation device for continuous drying and slag discharge according to claim 1, characterized in that: The connecting rods at the top and bottom ends are arranged in parallel, and there are two scrapers. The connecting rods and the scrapers form a frame shape, and the spiral stirring paddle and stirring rod are arranged within the frame area.

3. The low-temperature evaporation device for continuous drying and slag discharge according to claim 1, characterized in that: The outer wall of the vessel is spirally surrounded by a honeycomb jacket, which is connected to a heating medium circulation pipeline. A control valve for temperature regulation is installed on the circulation pipeline.

4. The low-temperature evaporation device for continuous drying and slag discharge according to claim 1, characterized in that: The stirring rod and the blades of the spiral stirring paddle on the same side have the same tilt angle, and the tilt angle is 15°~70°.

5. A low-temperature evaporation device for continuous drying and slag discharge according to claim 2, characterized in that: A dispersion slurry is mounted on the drive shaft located below the frame-shaped area. The dispersion slurry is in the shape of an inverted trapezoid and includes a plurality of connecting rods connected to the drive shaft from top to bottom. The length of the connecting rods decreases from top to bottom, and the ends of the plurality of connecting rods are connected to a dispersion rod.

6. The low-temperature evaporation device for continuous drying and slag discharge according to claim 1, characterized in that: The pressure inside the cylinder after being evacuated by the vacuum valve is -99kPa to -90kPa, and the normal pressure inside the cylinder is -101.325kPa.

7. A low-temperature evaporation device for continuous drying and slag discharge according to claim 5, characterized in that: The dispersing rod is equipped with a scraper, which scrapes against the inner wall of the vessel.

8. The low-temperature evaporation device for continuous drying and slag discharge according to claim 1, characterized in that: A support rod is connected between the stirring rods on the same side, and a dispersing block is mounted on the support rod. A gap is left between the dispersing block and the scraper.

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