Rectification device capable of recovering waste heat

Abstract

The utility model discloses a rectification device capable of recovering waste heat, which comprises a rectification tower, a feed inlet, a feed pump, a preheater, a steam heater, a circulating pump and a heat exchanger I. The feed pump is arranged on the feed inlet, the feed inlet is connected with a preheating pipe of the preheater, the discharge end of the preheating pipe is connected with a feed joint of the rectification tower through a feed pipe, and the discharge end of the preheating pipe is connected with a discharge joint of the rectification tower through a steam heater. A bottom discharge port is formed in the top of the rectifying tower, a top discharge port is formed in the top of the rectifying tower, a jacket for heating is arranged on the outer side of the rectifying tower, a heating inlet of the jacket is connected with a steam outlet of a steam heater, and a steam heating inlet connector of the steam heater is connected with a cooling liquid outlet of a heat exchanger I; according to the utility model, the waste heat in the rectifying tower is used for preheating the fed material, the waste heat in the distilled material at the top exchanges heat with the heat exchanger, and finally the heating medium returns to the steam heater, so that the waste heat is maximized, the energy loss is reduced, and the rectifying efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of distillation apparatus structure, and in particular to a distillation apparatus with waste heat recovery capability. Background Technology

[0002] A distillation column is the main equipment used in distillation operations to separate liquid mixtures. It utilizes the differences in volatility of the components in the mixture, through multiple partial vaporization and partial condensation, to gradually increase the concentration of the lighter components (more volatile components) in the gas phase and the concentration of the heavier components (less volatile components) in the liquid phase, thereby achieving separation. The distillation process requires heating of the column, typically using electric or steam heating. Regardless of the heating method, significant energy loss occurs. Therefore, continuously increasing the thermal efficiency of the distillation unit and reusing waste heat is a common practice in the industry. Against this backdrop, this invention designs a distillation device for waste heat recovery and utilization. Utility Model Content

[0003] The purpose of this invention is to provide a distillation apparatus capable of recovering waste heat.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A waste heat recovery distillation apparatus includes a distillation column, a feed inlet, a feed pump, a preheater, a steam heater, a circulating pump, and a heat exchanger. The feed pump is installed at the feed inlet, which is connected to the preheating pipe of the preheater. The outlet end of the preheating pipe is connected to the feed connector of the distillation column via a feed pipe. The top of the distillation column has a bottom outlet and a top outlet. A heating jacket is provided on the outside of the distillation column. The heating inlet of the jacket is connected to the steam outlet of the steam heater. The steam heating inlet connector of the steam heater is connected to the cooling liquid outlet of the heat exchanger. The cooling liquid inlet of the heat exchanger is connected to a circulating pipe and a makeup inlet. The other end of the circulating pipe is connected to the preheating outlet of the preheater. The preheating inlet of the preheater is connected to the heating outlet on the jacket via a heating outlet pipe. The circulating pump is installed on the circulating pipe. The top outlet of the distillation column is connected to the heat exchanger tube of the heat exchanger via a top outlet pipe.

[0006] Furthermore, a second heat exchanger is connected in series at the rear end of the first heat exchanger. The second heat exchanger is equipped with a second heat exchange tube. The outlet of the first heat exchanger is connected to the inlet of the second heat exchange tube. The distillation outlet of the second heat exchange tube is connected to a collection device. The second heat exchanger is connected in series with the first heat exchanger to further absorb the residual heat of the distilled upper material and reduce heat loss.

[0007] Furthermore, the steam heater is equipped with an electric heating wire. By energizing the electric heating wire, the heating medium in the steam heater is heated, and the generated high-temperature steam is introduced into the jacket of the distillation column for heating.

[0008] Furthermore, a valve is installed on the circulation pipe, and the valve is a ball valve.

[0009] Furthermore, a second valve, which is a ball valve, is installed on the replenishment port. The flow of the internal medium is controlled by both valves.

[0010] In summary, this utility model has the following beneficial effects: by using the waste heat in the distillation column to preheat the feed, exchanging the waste heat in the top distilled material with the waste heat through a heat exchanger, and finally returning the heating medium to the steam heater, the waste heat is maximized, energy loss is reduced, and distillation efficiency is improved. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0012] In the diagram, 1. Distillation column; 2. Feed inlet; 3. Feed pump; 4. Preheater; 5. Preheating tube; 6. Feed pipe; 7. Feed connector; 8. Bottom outlet; 9. Top outlet; 10. Steam heater; 11. Electric heating wire; 12. Steam outlet; 13. Heating inlet; 14. Jacket; 15. Heating outlet; 16. Heating outlet pipe; 17. Circulation pump; 18. Circulation pipe; 19. Valve 1; 20. Liquid replenishment port; 21. Valve 2; 22. Heat exchanger 1; 23. Top outlet pipe; 24. Heat exchanger tube 1; 25. Steam heating inlet connector; 26. Heat exchanger 2; 27. Heat exchanger tube 2; 28. Distillation outlet. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings. The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0014] like Figure 1As shown, a distillation apparatus with waste heat recovery includes a distillation column 1, a feed inlet 2, a feed pump 3, a preheater 4, a steam heater 10, a circulating pump 17, and a heat exchanger 22. The feed pump 3 is installed on the feed inlet 2, which is connected to the preheating pipe 5 of the preheater 4. The outlet end of the preheating pipe 5 is connected to the feed connector 7 of the distillation column 1 via a feed pipe 6. The top of the distillation column 1 has a bottom outlet 8 and a top outlet 9. The outer side of the distillation column 1 is provided with a heating jacket 14, and the heating inlet 13 of the jacket 14 is connected to the steam heater 22. The steam outlet 12 of the heater 10 is connected, the steam heating inlet connector 25 of the steam heater 10 is connected to the cooling liquid outlet of the heat exchanger 22, the cooling liquid inlet of the heat exchanger 22 is connected to the circulation pipe 18 and the replenishment port 20, the other end of the circulation pipe 18 is connected to the preheating outlet of the preheater 4, the preheating inlet of the preheater 4 is connected to the heating outlet 15 on the jacket 14 through the heating outlet pipe 16, the circulation pump 17 is installed on the circulation pipe 18, and the top outlet 9 of the distillation column 1 is connected to the heat exchange pipe 24 of the heat exchanger 22 through the top outlet pipe 23.

[0015] Furthermore, a second heat exchanger 26 is connected in series at the rear end of the first heat exchanger 22. The second heat exchanger 26 is equipped with a second heat exchange tube 27. The outlet of the first heat exchanger 22 is connected to the inlet of the second heat exchange tube 27. The distillation outlet 28 of the second heat exchange tube 27 is connected to a collection device. The second heat exchanger 27 is connected in series with the first heat exchanger 22 to further absorb the residual heat of the distilled upper material and reduce heat loss.

[0016] Furthermore, an electric heating wire 11 is installed inside the steam heater 10. By energizing the electric heating wire 11, the heating medium in the steam heater 10 is heated, and the generated high-temperature steam is introduced into the jacket 14 of the distillation column 1 for heating.

[0017] Furthermore, a valve 19 is installed on the circulation pipe 18, and the valve 19 is a ball valve.

[0018] Furthermore, a second valve 21 is installed on the replenishment port 20, and the second valve 21 is a ball valve. The flow of the internal medium is controlled by the first valve 19 and the second valve 21.

[0019] Working principle: The steam heater 10 is energized to heat the medium (water) and generate steam. The steam enters the jacket 14 outside the distillation column 1 to heat the material inside the distillation column 1, causing the material to evaporate and form a gas phase and a liquid phase. The liquid phase material is collected from the bottom outlet 8, and the gas phase material is collected from the top outlet 9. It then passes through heat exchanger 22 and heat exchanger 26, and is finally collected from the distillation outlet 28. Heat exchanger 22 heats the medium added to the circulation pipe 18 and the replenishment port 20. The heat absorbed by heat exchanger 26 can be used to generate hot water for other production in the workshop. The steam after passing through the jacket 14 enters the preheater 4 to preheat the material added to the distillation column 1, improving the efficiency of the distillation column 1. After the medium in the preheater 4 is liquefied, it is pumped to heat exchanger 22 by circulation pump 17 and then enters the steam heater 10 to continue circulating. The waste heat is retained in the system, and the temperature of the distillation outlet 28 is close to room temperature. The waste heat of this distillation system can be fully utilized, improving thermal efficiency.

[0020] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A distillation apparatus with waste heat recovery capability, comprising a distillation column (1), a feed inlet (2), a feed pump (3), a preheater (4), a steam heater (10), a circulating pump (17), and a heat exchanger (22), characterized in that: The feed pump (3) is installed on the feed inlet (2), which is connected to the preheating pipe (5) of the preheater (4). The discharge end of the preheating pipe (5) is connected to the feed connector (7) of the distillation column (1) through the feed pipe (6). The distillation column (1) has a bottom outlet (8) at the top and a top outlet (9) at the top. A heating jacket (14) is provided on the outside of the distillation column (1). The heating inlet (13) of the jacket (14) is connected to the steam outlet (12) of the steam heater (10). The steam heating inlet connector (25) of the steam heater (10) is connected to the coolant outlet of the heat exchanger (22). The coolant outlet of the heat exchanger (22) is... The outlet is connected to the circulation pipe (18) and the replenishment port (20). The other end of the circulation pipe (18) is connected to the preheating outlet of the preheater (4). The preheating inlet of the preheater (4) is connected to the heating outlet (15) on the jacket (14) through the heating outlet pipe (16). The circulation pump (17) is installed on the circulation pipe (18). The top outlet (9) of the distillation column (1) is connected to the heat exchange pipe (24) of the heat exchanger (22) through the top outlet pipe (23).

2. The waste heat recovery distillation apparatus according to claim 1, characterized in that: The rear end of the heat exchanger one (22) is connected in series with the heat exchanger two (26). The heat exchanger two (26) is provided with the heat exchange tube two (27). The outlet of the heat exchanger one (22) is connected to the inlet of the heat exchange tube two (27). The distillation outlet (28) of the heat exchange tube two (27) is connected to the collection device.

3. The waste heat recovery distillation apparatus according to claim 1, characterized in that: The steam heater (10) is equipped with an electric heating wire (11).

4. The waste heat recovery distillation apparatus according to claim 1, characterized in that: A valve (19) is installed on the circulation pipe (18), and the valve (19) is a ball valve.

5. A distillation apparatus with waste heat recovery capability according to claim 1, characterized in that: The replenishment port (20) is equipped with valve two (21), which is a ball valve.

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