Petroleum resin raw material dehydration device

Abstract

The utility model relates to a kind of petroleum resin raw material dehydration devices, including dehydration kettle with heating jacket, feed pipe, unloading pipe, its technical key points are: dehydration kettle center is equipped with center heat exchange pipe, laminar flow heat exchange structure is arranged around center heat exchange pipe in dehydration kettle, laminar flow heat exchange structure includes bottom plate, first concentric tube, first concentric sleeve, second concentric tube, second concentric sleeve, third concentric tube, fourth concentric tube, the upper end of first concentric tube is equipped with the receiving hopper corresponding feed pipe, the lower end of first concentric tube, second concentric tube and third concentric tube is equipped with multiple overflow through holes respectively, the bottom of first concentric sleeve and second concentric tube is equipped with lower communication pipeline with heating jacket lower portion intercommunication, the top of first concentric sleeve and second concentric sleeve is equipped with upper communication pipeline and leads out dehydration kettle. Except that double jacket provides distillation heat source, laminar flow heat exchange structure is set in distillation kettle, raw material is closer to heat source, and distillation dehydration efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to the technical field of petroleum resin production equipment, specifically to a petroleum resin raw material dehydration device. Background Technology

[0002] Petroleum resins generally use anhydrous aluminum trichloride as a catalyst for polymerization. However, anhydrous aluminum trichloride hydrolyzes when it comes into contact with water, releasing a large amount of heat and causing permanent deactivation. Therefore, the petroleum resin raw materials need to be pre-dehydrated before being transported to the polymerization reactor via pipelines for reaction.

[0003] For example, CN 213375204 U discloses a dehydration device for C5 petroleum resin raw materials, which includes a distillation tower and a material recovery tower. The material recovery tower is located at the bottom of the distillation tower. The distillation tower is a double-jacketed vessel. The outer shell of the vessel is equipped with a high-pressure steam pipeline and a liquid discharge pipeline. The interior of the vessel is equipped with multiple partitions, and each partition has multiple liquid film distributors. The top of the distillation tower is equipped with a vacuum pipeline and an inlet pipeline. This dehydration device has a fast evaporation and concentration rate, uniform evaporation and concentration, is suitable for continuous production, and has high production efficiency. However, the following problem still exists: relying solely on the double-jacketed structure to provide the distillation heat source, the distillation efficiency still needs to be improved. Utility Model Content

[0004] The purpose of this invention is to provide a petroleum resin raw material dehydration device with a reasonable structure and reliable operation that solves the above problems. In addition to the double-layer jacket providing the distillation heat source, a laminar flow heat exchange structure is set in the distillation kettle, so that the raw material is closer to the heat source, thereby further improving the distillation dehydration efficiency.

[0005] The technical solution of this utility model is:

[0006] A petroleum resin raw material dehydration device includes a dehydration vessel with a heating jacket, a feed pipe located at the top of the dehydration vessel, and a discharge pipe located at the bottom of the dehydration vessel. The key technical features are: a central heat exchange tube is located at the center of the dehydration vessel; the upper end of the central heat exchange tube is a water outlet leading out to the top surface of the dehydration vessel, and the lower end of the central heat exchange tube is a water inlet leading out to the bottom surface of the dehydration vessel; a laminar flow heat exchange structure is arranged around the central heat exchange tube inside the dehydration vessel; the laminar flow heat exchange structure includes a base plate, a first concentric tube located on the base plate and close to the central heat exchange tube, and a first concentric sleeve adjacent to the first concentric tube. The first concentric tube is adjacent to the second concentric sleeve, the second concentric sleeve is adjacent to the second concentric tube, the third concentric tube is adjacent to the second concentric sleeve, and the fourth concentric tube is adjacent to the third concentric tube and close to the inner wall of the dehydration kettle. The upper end of the first concentric tube is provided with a receiving hopper corresponding to the feed pipe. The lower ends of the first concentric tube, the second concentric tube and the third concentric tube are respectively provided with multiple flow holes. The bottom of the first concentric sleeve and the second concentric tube are provided with a lower connecting pipe that communicates with the lower part of the heating jacket. The top of the first concentric sleeve and the second concentric sleeve are provided with an upper connecting pipe that leads out of the dehydration kettle.

[0007] In the above-mentioned petroleum resin raw material dehydration device, a support column group is provided between the bottom plate and the inner bottom surface of the dehydration kettle. The bottom plate is provided with a first discharge valve corresponding to the lower end of the first concentric tube, a second discharge valve corresponding to the lower end of the second concentric tube, and a third discharge valve corresponding to the lower end of the third concentric tube.

[0008] The aforementioned petroleum resin raw material dehydration device has a vacuum port at the top of the dehydration vessel.

[0009] In the above-mentioned petroleum resin raw material dehydration device, the upper end of the central heat exchange tube is welded and fixed to the top of the dehydration kettle, the unloading pipe is a right-angle pipe, and the lower end of the central heat exchange tube passes through the horizontal section of the right-angle pipe and is welded and fixed.

[0010] The beneficial effects of this utility model are:

[0011] This application employs a double-layer jacket and laminar flow heat exchange structure, which brings the raw material closer to the heat source during the folding process, significantly improving the distillation and dehydration efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 yes Figure 1 Schematic diagram of a mid-laminar flow heat transfer structure;

[0014] Figure 3 yes Figure 2 Sectional view along the AA direction.

[0015] In the diagram: 1. Central heat exchanger tube, 2. Feed pipe, 3. Receiving hopper, 4. Dehydration vessel, 5. Upper connecting pipe, 6. Heating jacket, 7. Fourth concentric tube, 8. Third concentric tube, 9. Second concentric sleeve, 10. Second concentric tube, 11. First concentric sleeve, 12. First concentric tube, 13. Third discharge valve, 14. Lower connecting pipe, 15. Discharge pipe, 16. First discharge valve, 17. Second discharge valve, 18. Base plate, 19. Vacuum port, 20. Through-flow hole. Detailed Implementation

[0016] The present invention will be described in detail with reference to the accompanying drawings.

[0017] like Figures 1-3 As shown, the petroleum resin raw material dehydration device includes a dehydration vessel 4 with a heating jacket 6, a feed pipe 2 located at the top of the dehydration vessel 4, and a discharge pipe 15 located at the bottom of the dehydration vessel 4.

[0018] The dehydration vessel 4 has a central heat exchange tube 1 at its center. The upper end of the central heat exchange tube 1 is a water outlet leading out of the top surface of the dehydration vessel 4, and the lower end of the central heat exchange tube 1 is a water inlet leading out of the bottom surface of the dehydration vessel 4. In this embodiment, the upper end of the central heat exchange tube 1 is welded and fixed to the top of the dehydration vessel 4, and the unloading pipe 15 is a right-angle pipe. The lower end of the central heat exchange tube 1 passes through the horizontal section of the right-angle pipe and is welded and fixed.

[0019] The dehydration vessel 4 is equipped with a laminar flow heat exchange structure surrounding the central heat exchange tube 1. The laminar flow heat exchange structure includes a base plate 18, a first concentric tube 12 mounted on the base plate 18 and close to the central heat exchange tube 1, a first concentric sleeve 11 adjacent to the first concentric tube 12, a second concentric tube 10 adjacent to the first concentric sleeve 11, a second concentric sleeve 9 adjacent to the second concentric tube 10, a third concentric tube 8 adjacent to the second concentric sleeve 9, and a fourth concentric tube 7 adjacent to the third concentric tube 8 and close to the inner wall of the dehydration vessel 4. The upper end of the first concentric tube 12 is provided with a receiving hopper 3 corresponding to the feed pipe 2, and the lower ends of the first concentric tube 12, the second concentric tube 10, and the third concentric tube 8 are respectively provided with multiple flow holes 20. The bottom of the first concentric sleeve 11 and the second concentric sleeve 9 are provided with a lower connecting pipe 14 communicating with the lower part of the heating jacket 6, and the top of the first concentric sleeve 11 and the second concentric sleeve 9 are provided with an upper connecting pipe 5 leading out of the dehydration vessel 4.

[0020] In this embodiment, a support column is provided between the bottom plate 18 and the inner bottom surface of the dehydration vessel 4. The bottom plate 18 is provided with a first discharge valve 16 corresponding to the lower end of the first concentric tube 12, a second discharge valve 17 corresponding to the lower end of the second concentric tube 10, and a third discharge valve 13 corresponding to the lower end of the third concentric tube 8. The top of the dehydration vessel 4 is provided with a vacuum port 19.

[0021] Working principle:

[0022] 1. During operation, heating medium is introduced into heating jacket 6, first concentric sleeve 11, second concentric sleeve 9 and central heat exchange tube 1, and vacuum is drawn using vacuum port 19.

[0023] 2. Petroleum resin raw material is injected through the feed pipe 2. The raw material falls into the receiving hopper 3 and enters the annular cavity between the first concentric tube 12 and the central heat exchange tube 1 through its side wall. It then enters the annular cavity between the first concentric tube 12 and the first concentric sleeve 11 through the flow-through hole 20 at the lower end of the first concentric tube 12. The raw material rises and overflows through the upper edge of the first concentric sleeve 11 into the annular cavity between the first concentric sleeve 11 and the second concentric tube 10. After falling, it flows through the flow-through hole 2 at the lower end of the second concentric tube 10. The material enters the annular cavity between the second concentric tube 10 and the second concentric sleeve 9. The material rises again and overflows through the upper edge of the second concentric sleeve 9 into the annular cavity between the second concentric sleeve 9 and the third concentric tube 8. After falling, it enters the annular cavity between the third concentric tube 8 and the fourth concentric tube 7 through the flow hole 20 at the lower end of the third concentric tube 8. The material rises again and overflows through the upper edge of the fourth concentric tube 7 into the dehydration kettle 4. In this process, laminar flow high-efficiency heat exchange is achieved, which significantly improves the dehydration efficiency.

[0024] 3. After the dehydration process is complete, open the first discharge valve 16, the second discharge valve 17 and the third discharge valve 13 to remove the raw materials accumulated in the laminar flow heat exchange structure.

[0025] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this utility model.

Claims

1. A petroleum resin raw material dehydration device, comprising a dehydration vessel with a heating jacket, a feed pipe disposed at the top of the dehydration vessel, and a discharge pipe disposed at the bottom of the dehydration vessel, characterized in that: The dehydration vessel has a central heat exchange tube at its center. The upper end of the central heat exchange tube is a water outlet leading out of the top surface of the dehydration vessel, and the lower end of the central heat exchange tube is a water inlet leading out of the bottom surface of the dehydration vessel. A laminar flow heat exchange structure is arranged around the central heat exchange tube inside the dehydration vessel. The laminar flow heat exchange structure includes a base plate, a first concentric tube disposed on the base plate and close to the central heat exchange tube, a first concentric sleeve adjacent to the first concentric tube, a second concentric tube adjacent to the first concentric sleeve, a second concentric sleeve adjacent to the second concentric tube, a third concentric tube adjacent to the second concentric sleeve, and a fourth concentric tube adjacent to the third concentric tube and close to the inner wall of the dehydration vessel. The upper end of the first concentric tube is provided with a receiving hopper corresponding to the feed pipe. The lower ends of the first, second, and third concentric tubes are respectively provided with multiple flow holes. The bottom of the first concentric sleeve and the second concentric tube are provided with a lower connecting pipe communicating with the lower part of the heating jacket. The top of the first and second concentric sleeves are provided with an upper connecting pipe leading out of the dehydration vessel.

2. The petroleum resin raw material dehydration device according to claim 1, characterized in that: A support column assembly is provided between the bottom plate and the inner bottom surface of the dehydration vessel. The bottom plate is provided with a first discharge valve corresponding to the lower end of the first concentric tube, a second discharge valve corresponding to the lower end of the second concentric tube, and a third discharge valve corresponding to the lower end of the third concentric tube.

3. The petroleum resin raw material dehydration device according to claim 1, characterized in that: The dehydration vessel is equipped with a vacuum port at the top.

4. The petroleum resin raw material dehydration device according to claim 1, characterized in that: The upper end of the central heat exchange tube is welded and fixed to the top of the dehydration vessel. The unloading pipe is a right-angle pipe. The lower end of the central heat exchange tube passes through the horizontal section of the right-angle pipe and is welded and fixed.

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