Falling film reboiler evaporation system based on heat-sensitive materials

Abstract

The invention discloses a falling film reboiler evaporation system based on a heat-sensitive material, and relates to the technical field of falling film reboilers, the falling film reboiler evaporation system comprises a shell, the upper part of the inner side of the shell is fixedly connected with partition plates I at equal intervals from top to bottom, and the lower side surface of each partition plate I is uniformly and fixedly connected with a plurality of heat exchange pipes; inclined holes are formed in the corresponding positions of the upper side surface of the first partition plate and communicate with the corresponding heat exchange pipes correspondingly, the lower ends of the heat exchange pipes are fixedly connected with round holes formed in the corresponding positions of the third partition plate correspondingly, and the lower end of each heat exchange pipe penetrates through the corresponding round hole to extend to the lower side of the third partition plate. The side surface of the third partition plate is fixedly connected with the corresponding position of the inner side surface of the shell, a second partition plate is arranged between the third partition plate and the first partition plate, attachments on the inner side and the outer side of the pipeline are automatically scraped, the attachments are prevented from affecting heat exchange work, and the heat exchange work effect is more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of falling film reboilers, in particular to a falling film reboiler evaporation system based on heat-sensitive materials. Background Art

[0002] Falling film reboiler is mainly used in distillation and evaporation processes. In the distillation process, the falling film reboiler evaporates the liquid at the bottom of the tower by heating to generate steam, thereby promoting the separation and concentration of the materials in the tower. 12. Falling film reboiler is particularly suitable for materials with high boiling points and good fluidity, such as the distillation of ethylene glycol and propylene glycol. The working principle of the falling film reboiler is to distribute the material to each evaporation tube through a distribution device, so that the material flows from top to bottom along the inner wall of the falling film tube in a thin film state, and at the same time, external heating is used to evaporate it. The structure of the falling film reboiler includes three parts: the body, the cap and the bottom. There are material distribution trays and distribution plates in the cap to ensure uniform distribution of the material.

[0003] Since the boiling range of the cold side material is long and the temperature difference with the hot side steam is large, the wall temperature of the heat exchange tube is too high. If a falling film reboiler is used, it is difficult to maintain a stable liquid film in the tube. Therefore, the heat source on the hot side is replaced with hot water. Although the problem of excessive temperature is solved by heating the pipeline with hot water, scale will form on the pipeline after long-term heating with hot water, affecting the subsequent heat transfer work. Therefore, we propose a falling film reboiler evaporation system based on heat-sensitive materials. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a falling film reboiler evaporation system based on heat-sensitive materials, which automatically scrapes off the attachments on the inside and outside of the pipeline to avoid the attachments affecting the heat exchange work, making the heat exchange more uniform in the working effect, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a falling film reboiler evaporation system based on heat-sensitive materials, comprising an outer shell, the inner upper part of the outer shell is fixedly connected to partition one at equal distances from top to bottom, a plurality of heat exchange tubes are evenly fixedly connected to the lower surface of partition one, inclined holes are respectively opened at corresponding positions on the upper surface of partition one, the inclined holes are respectively connected to corresponding heat exchange tubes, the lower ends of the heat exchange tubes are respectively fixedly connected to the circular holes opened at corresponding positions on partition three, the lower ends of each heat exchange tube respectively extend through the circular holes to the lower side of partition three, the side surface of partition three is fixedly connected to the corresponding position of the inner surface of the outer shell, partition two is arranged between partition three and partition one, and the partition two The side surface is slidably connected to the inner surface of the shell, and the partition two is slidably connected to the outer surface of the heat exchange tube through the sliding hole opened at the corresponding position of the upper surface. The left and right parts of the upper surface of the partition two are fixedly connected with sleeves, and the lower ends of the two sleeves respectively pass through the through holes opened on the partition two and extend to the lower side of the partition two, and are respectively connected to the rotating nozzles. The outer surfaces of the two sleeves are slidably connected to the circular holes opened at the corresponding positions on the partition one, and the upper ends of the sleeves extend through the circular holes to the upper side of the partition one, and through the circular holes opened on the shell to extend to the upper outer side of the shell. The upper side of the sleeve is slidably connected to the lower part of the hot water input pipe, and the hot water input pipe is connected to the hot water heating mechanism.

[0006] The partition two is designed so that the scale that may be attached to the inner wall of the heat exchange tube can be scraped off through the partition two, so as to avoid uneven heating of the heat-sensitive materials in the heat exchange tube, so as to ensure the normal operation of the heat exchange. The rotating nozzle is designed so that hot water can be added while rotating, so that the filling of hot water is more uniform and the temperature of different areas of the hot water is uniform. The casing with a larger displacement is designed so that the pressure difference between the incoming flow and the outgoing flow forces the partition two to move automatically, so as to perform automatic descaling, so as to facilitate operation. When the control system is working, the hot water is first injected into the casing through the hot water input pipe, so as to enter between the partition three and the partition two to heat the heat-sensitive materials in the heat exchange tube. At the same time, the increased hydraulic pressure forces the partition two to rise, so as to control the partition two to scrape the surface of the heat exchange tube. When all the heating work is completed and the hot water injection is ended, the partition two rises and automatically descends, so as to automatically clean the outer wall of the heat exchange tube.

[0007] Furthermore, the evaporation system also includes a magnet, the upper surface of the partition plate 2 is fixedly connected to the magnet at an equal angle, and the interior of each heat exchange tube is slidably connected to a scraper ring.

[0008] A scraper ring made of metal is designed so that when the magnet on the second partition moves, the scraper ring is driven to move up and down, thereby cleaning the possible attachments on the inner wall of the heat exchange tube, so that the heat exchange work can be carried out better.

[0009] Furthermore, the heating mechanism comprises a hot water heater, a water outlet of the hot water heater is connected to the upper end of a hot water input pipe through a hose, and a second liquid pump is installed inside the hot water input pipe.

[0010] The hot water heater is designed so that the hot water is heated by steam.

[0011] Furthermore, the evaporation system also includes a hot water tank, a water outlet of the hot water tank is connected to a water inlet of the hot water heater through a pipeline, and a liquid pump is installed in the pipeline.

[0012] The hot water tank is designed to provide hot water while storing the circulated hot water for recycling.

[0013] Furthermore, the evaporation system also includes a hot water discharge pipe, the outer surface of the shell is located at the upper position of the partition three and is connected to one end of the hot water discharge pipe, the other end of the hot water discharge pipe is connected to the water inlet pipe of the hot water tank, and a liquid pump three is installed inside the hot water discharge pipe.

[0014] The flow rate of the hot water discharge pipe is designed to be smaller than that of the casing, so that the flow difference will increase the hot water between the partition two and the partition three, thereby forcing the partition two to move.

[0015] Furthermore, the evaporation system also includes a steam exhaust pipe, and the outer surface of the shell is located at a lower position of the partition three and is connected to the steam exhaust pipe.

[0016] The steam discharge pipe is designed to discharge the steam separated after boiling.

[0017] Furthermore, the evaporation system also includes a heat-sensitive material tank, a discharge port of the heat-sensitive material tank is connected to a feed port of the shell through a material input pipe, and a liquid pump 4 is installed inside the material input pipe.

[0018] A heat-sensitive material tank is provided to store heat-sensitive materials.

[0019] Compared with the prior art, the beneficial effects of the present invention are: the falling film reboiler evaporation system based on heat-sensitive materials has the following advantages: 1. Design the second partition to scrape off the scale that may be attached to the inner wall of the heat exchange tube through the second partition, so as to avoid uneven heating of the heat-sensitive materials in the heat exchange tube, thereby ensuring the normal heat exchange work; 2. The rotating nozzle is designed so that hot water can be added while rotating, so that the hot water can be added more evenly and the temperature of hot water in different areas can be even; 3. The flow rate of the hot water discharge pipe is designed to be smaller than that of the casing, so that the flow difference will increase the hot water between baffles 2 and 3, thus forcing baffle 2 to move; 4. Design a scraper ring made of metal so that when the magnet on the second partition moves, it drives the scraper ring to move up and down, thereby cleaning the possible attachments on the inner wall of the heat exchange tube, so that the heat exchange work can be carried out better. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of the present invention; Figure 2 A schematic diagram of the housing structure of the present invention; Figure 3 Schematic diagram of the internal structure of the housing of the present invention; Figure 4 A schematic diagram of the internal structure of the housing of the present invention when viewed from above; Figure 5 A schematic diagram of the cross-sectional structure of the internal shell of the present invention; Figure 6 It is a schematic diagram of the internal structure of the heat exchange tube of the present invention.

[0021] In the figure: 1. hot water tank; 2. liquid pump 1; 3. hot water heater; 4. hot water input pipe; 5. liquid pump 2; 6. outer shell; 7. hot water discharge pipe; 8. material input pipe; 9. material output pipe; 10. steam discharge pipe; 11. partition 1; 12. casing; 13. heat exchange tube; 14. partition 2; 15. partition 3; 16. magnet; 17. scraper ring; 18. liquid pump 3; 19. thermal material tank; 20. liquid pump 4. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-6The present embodiment provides a technical solution: a falling film reboiler evaporation system based on heat-sensitive materials, comprising: a shell 6, the inner upper part of the shell 6 is fixedly connected to a partition 11 at equal distances from top to bottom, a plurality of heat exchange tubes 13 are evenly fixedly connected to the lower surface of the partition 11, and oblique holes are respectively opened at corresponding positions on the upper surface of the partition 11, and the oblique holes are respectively connected to the corresponding heat exchange tubes 13, and the lower ends of the heat exchange tubes 13 are respectively fixedly connected to the circular holes opened at corresponding positions on the partition 3 15, and the lower ends of each heat exchange tube 13 extend through the circular holes to the lower side of the partition 3 15, and the side surface of the partition 3 15 is fixedly connected to the corresponding position of the inner surface of the shell 6, and a partition 2 14 is arranged between the partition 3 15 and the partition 1 11, and the side surface of the partition 2 14 It is slidably connected to the inner surface of the shell 6, and the partition 2 14 is slidably connected to the outer surface of the heat exchange tube 13 through the sliding hole opened at the corresponding position of the upper surface. The left and right parts of the upper surface of the partition 2 14 are fixedly connected with the sleeves 12 respectively, and the lower ends of the two sleeves 12 respectively pass through the through holes opened on the partition 2 14 to extend to the lower side of the partition 2 14, and are respectively connected to the rotating nozzles. The outer surfaces of the two sleeves 12 are slidably connected to the circular holes opened at the corresponding positions on the partition 1 11 respectively, and the upper end of the sleeve 12 extends through the circular hole to the upper side of the partition 1 11, and passes through the circular hole opened on the shell 6 to extend to the upper outer side of the shell 6. The upper inner part of the sleeve 12 is slidably connected to the lower part of the hot water input pipe 4, and the hot water input pipe 4 is connected to the hot water heating mechanism.

[0024] The partition plate 14 is designed so that the scale that may be attached to the inner wall of the heat exchange tube 13 can be scraped off by the partition plate 14, so as to avoid uneven heating of the heat-sensitive material in the heat exchange tube 13, so as to ensure the normal heat exchange work. The rotating nozzle is designed so that hot water can be added while rotating, so that the filling of hot water is more uniform and the temperature of different areas of the hot water is uniform. The sleeve 12 with a larger displacement is designed so that the pressure difference between the incoming flow and the outgoing flow forces the partition plate 14 to move automatically, so as to perform automatic descaling, so as to facilitate operation. When the control system is working, the hot water is first injected into the sleeve 12 through the hot water input pipe 4, so as to enter between the partition plate 3 15 and the partition plate 2 14 to heat the heat-sensitive material in the heat exchange tube 13. At the same time, the increased hydraulic pressure forces the partition plate 14 to rise, so as to control the partition plate 14 to scrape the surface of the heat exchange tube 13. When all the heating work is completed and the hot water injection is finished, the partition plate 14 rises and automatically descends, so as to automatically clean the outer wall of the heat exchange tube 13.

[0025] The evaporation system further comprises a magnet 16 , and the upper surface of the partition plate 14 is fixedly connected to the magnet 16 at equal angles, and the interior of each heat exchange tube 13 is slidably connected to a scraper ring 17 .

[0026] A scraper ring 17 made of metal is designed so that when the magnet 16 on the partition plate 14 moves, the scraper ring 17 is driven to move up and down, thereby cleaning the attachments that may appear on the inner wall of the heat exchange tube 13, so that the heat exchange work can be carried out better.

[0027] The heating mechanism comprises a hot water heater 3, a water outlet of the hot water heater 3 is connected to the upper end of a hot water input pipe 4 through a hose, and a liquid pump 5 is installed inside the hot water input pipe 4.

[0028] The hot water heater 3 is designed to heat hot water by steam.

[0029] The evaporation system also includes a hot water tank 1, a water outlet of the hot water tank 1 is connected to a water inlet of a hot water heater 3 through a pipeline, and a liquid pump 2 is installed in the pipeline.

[0030] The hot water tank 1 is designed so that while providing hot water, the circulated hot water can be stored for recycling.

[0031] The evaporation system also includes a hot water discharge pipe 7. The outer surface of the shell 6 is located at the upper position of the partition three 15 and is connected to one end of the hot water discharge pipe 7. The other end of the hot water discharge pipe 7 is connected to the water inlet pipe of the hot water tank 1. A liquid pump three 18 is installed inside the hot water discharge pipe 7.

[0032] The flow rate of the hot water discharge pipe 7 is designed to be smaller than that of the sleeve 12, so that the flow difference will increase the hot water between the partition plate 2 14 and the partition plate 3 15, thereby forcing the partition plate 2 14 to move.

[0033] The evaporation system further comprises a steam exhaust pipe 10 , and the outer surface of the shell 6 is located at a lower position of the partition three 15 and is connected to the steam exhaust pipe 10 .

[0034] The steam discharge pipe 10 is designed so as to discharge the steam separated after boiling.

[0035] The evaporation system also includes a heat-sensitive material tank 19, a discharge port of the heat-sensitive material tank 19 is connected to the feed port of the shell 6 through a material input pipe 8, and a liquid pump 20 is installed inside the material input pipe 8.

[0036] A heat-sensitive material tank 19 is provided to store the heat-sensitive material.

[0037] The working principle of a falling film reboiler evaporation system based on heat-sensitive materials provided by the present invention is as follows: The hot water tank 1 first delivers hot water into the hot water heater 3 for heating. After heating, the hot water is injected into the sleeve 12 through the hot water input pipe 4, thereby entering between the partition three 15 and the partition two 14 to heat the heat-sensitive material in the heat exchange tube 13. The flow rate of the hot water discharge pipe 7 is smaller than that of the sleeve 12, so the flow difference will increase the hot water between the partition two 14 and the partition three 15. The increased hydraulic pressure forces the partition two 14 to rise, thereby controlling the partition two 14 to scrape the surface of the heat exchange tube 13. When all the heating work is completed and the hot water injection is finished, the partition two 14 rises and automatically descends, thereby automatically cleaning the outer wall of the heat exchange tube 13. When the magnet 16 on the partition plate 14 moves, it drives the scraper ring 17 to move up and down, thereby cleaning the possible attachments on the inner wall of the heat exchange tube 13, so that the heat exchange work can be carried out better. The steam separated after boiling is discharged through the steam discharge pipe 10, and the heated hot water is recovered into the hot water tank 1 through the hot water discharge pipe 7. The liquid pump 1 2, the liquid pump 2 5, the liquid pump 3 18, and the liquid pump 4 20 are controlled to start conveying hot water and heat-sensitive materials.

[0038] It is worth noting that, as disclosed in the above embodiments, the methods commonly used in the prior art are adopted to control the operation of liquid pump 1 2, liquid pump 2 5, liquid pump 3 18, and liquid pump 4 20 through an external control switch group.

[0039] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A falling film reboiler evaporation system based on heat-sensitive materials, characterized in that: The invention comprises: a shell (6), the inner upper part of the shell (6) being fixedly connected to a partition plate (11) at equal distances from top to bottom, the lower surface of the partition plate (11) being evenly fixedly connected to a plurality of heat exchange tubes (13), the upper surface of the partition plate (11) being provided with inclined holes at corresponding positions, the inclined holes being connected to corresponding heat exchange tubes (13), the lower ends of the heat exchange tubes (13) being fixedly connected to circular holes at corresponding positions on the partition plate (15), the lower ends of each heat exchange tube (13) being respectively passed through the circular holes and extending to the lower side of the partition plate (15), the side surface of the partition plate (15) being fixedly connected to the corresponding position of the inner surface of the shell (6), a partition plate (14) being arranged between the partition plate (15) and the partition plate (11), the side surface of the partition plate (14) being slidably connected to the inner surface of the shell (6) The partition plate 2 (14) is slidably connected to the outer surface of the heat exchange tube (13) through a sliding hole opened at a corresponding position on the upper surface. The left and right parts of the upper surface of the partition plate 2 (14) are respectively fixedly connected to the sleeves (12). The lower ends of the two sleeves (12) respectively pass through the through holes opened on the partition plate 2 (14) to extend to the lower side of the partition plate 2 (14) and are respectively connected to the rotating nozzles. The outer surfaces of the two sleeves (12) are respectively slidably connected to the circular holes opened at corresponding positions on the partition plate 1 (11). The upper ends of the sleeves (12) pass through the circular holes to extend to the upper side of the partition plate 1 (11) and pass through the circular holes opened on the outer shell (6) to extend to the upper outer side of the outer shell (6). The upper inner part of the sleeve (12) is slidably connected to the lower part of the hot water input pipe (4), and the hot water input pipe (4) is connected to the hot water heating mechanism.

2. The falling film reboiler evaporation system based on heat-sensitive materials according to claim 1, characterized in that: The evaporation system further comprises a magnet (16), the upper surface of the second partition plate (14) is fixedly connected to the magnet (16) at an equal angle, and the interior of each heat exchange tube (13) is slidably connected to a scraper ring (17).

3. The falling film reboiler evaporation system based on heat-sensitive materials according to claim 1, characterized in that: The heating mechanism comprises a hot water heater (3), the water outlet of the hot water heater (3) being connected to the upper end of a hot water input pipe (4) via a hose, and a second liquid pump (5) being installed inside the hot water input pipe (4).

4. The falling film reboiler evaporation system based on heat-sensitive materials according to claim 1, characterized in that: The evaporation system further comprises a hot water tank (1), the water outlet of the hot water tank (1) being connected to the water inlet of the hot water heater (3) via a pipeline, and a liquid pump (2) being installed in the pipeline.

5. The falling film reboiler evaporation system based on heat-sensitive materials according to claim 1, characterized in that: The evaporation system further comprises a hot water discharge pipe (7); the outer surface of the shell (6) is located at the upper position of the partition plate (15) and is connected to one end of the hot water discharge pipe (7); the other end of the hot water discharge pipe (7) is connected to the water inlet pipe of the hot water tank (1); and a liquid pump (18) is installed inside the hot water discharge pipe (7).

6. The falling film reboiler evaporation system based on heat-sensitive materials according to claim 1, characterized in that: The evaporation system further comprises a steam exhaust pipe (10), and the outer surface of the shell (6) is located at a lower position of the partition three (15) and is connected to the steam exhaust pipe (10).

7. The falling film reboiler evaporation system based on heat-sensitive materials according to claim 1, characterized in that: The evaporation system further comprises a heat-sensitive material tank (19), the discharge port of the heat-sensitive material tank (19) being connected to the feed port of the housing (6) via a material input pipe (8), and a liquid pump four (20) is installed inside the material input pipe (8).

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