Ethylene glycol rectification waste heat recovery processing device

Abstract

The utility model discloses an ethylene glycol rectification waste heat recovery processing device which comprises an outer box, a partition plate is arranged on the inner wall of the outer box, air holes are formed in the partition plate, an inner box is arranged on the partition plate, and a liquid inlet pipe is arranged at the upper end of the inner box and penetrates out of the top wall of the outer box. A liquid discharge pipe is arranged at the lower end of the inner box and penetrates out of the bottom wall of the outer box, a heat dissipation device is arranged on the outer box, a heat exchange device is arranged in the inner box and extends out of the side wall of the outer box, and a spraying device is arranged in the inner box. The utility model belongs to the technical field of waste heat recovery, and particularly relates to an ethylene glycol rectification waste heat recovery treatment device which solves the problem of low heat recovery efficiency in the prior art.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat recovery, and specifically relates to a device for recovering waste heat from ethylene glycol distillation. Background Art

[0002] Ethylene glycol is a colorless, odorless, sweet liquid with low toxicity to animals. It is miscible with water and acetone, but has low solubility in ethers. It is mainly used in the production of polyester, polyester, polyester resin, desiccant, plasticizer, surfactant, synthetic fiber, cosmetics and explosives. Distillation is a separation process that uses the different volatility of each component in a mixture to separate the components.

[0003] In order to avoid wasting residual heat in the solution after distillation of ethylene glycol, it is usually necessary to recover the heat. In the existing technology, there are many recovery methods. The use of heat exchangers for heat recovery has some shortcomings: the heat recovery efficiency is low, and some heat is still dissipated. In order to improve the heat recovery efficiency, it is necessary to develop a high recovery rate equipment. Utility Model Content

[0004] The technical problem to be solved by the utility model is the low heat recovery efficiency in the prior art.

[0005] In order to achieve the above functions, the technical solution adopted by the present invention is as follows: a device for recovering and processing waste heat from ethylene glycol distillation, comprising an outer box, a partition provided on the inner wall of the outer box, an air vent provided in the partition, an inner box provided on the partition, an upper end of the inner box provided with a liquid inlet pipe and passing through the top wall of the outer box, a lower end of the inner box provided with a liquid discharge pipe and passing through the bottom wall of the outer box, a heat dissipation device provided on the outer box, a heat exchange device provided in the inner box and coming out from the side wall of the outer box, and a spraying device provided in the inner box; the heat exchange device comprises a heat exchange coil, the heat exchange coil is located inside the inner box and is arranged in an up and down manner, an inlet valve and a drain valve are provided on the heat exchange coil, cold water enters through the inlet valve, absorbs heat through the heat exchange coil, and is discharged from the drain valve.

[0006] Furthermore, the heat dissipation device includes an exhaust fan, which is arranged between the inner box and the outer box. A heat dissipation valve is connected to the exhaust fan, and the other end of the exhaust fan is connected to a cover. The heat between the outer box and the inner box can be circulated through the air vents when extracted by the exhaust fan, so that the heat between the outer box and the inner box can be discharged.

[0007] Furthermore, the spraying device includes a circulation pipe, one end of which is located at the bottom of the inner box and the other end is located at the top of the inner box. A circulation pump is provided on the circulation pipe, and the upper end of the circulation pipe is connected to a water sprinkling plate. The ethylene glycol in the inner box can be circulated up and down through the water sprinkling plate, so that the heat from the upper and lower parts is evenly absorbed by the heat exchange coil.

[0008] Preferably, a heat-insulating layer is provided on the inner wall of the inner box, which can effectively prevent the heat of the ethylene glycol solution in the inner box from being dissipated outward.

[0009] Preferably, observation windows are provided at the same horizontal position on the outer box and the inner box.

[0010] Preferably, a temperature sensor is provided in the inner box.

[0011] The utility model adopts the above structure to achieve the following beneficial effects:

[0012] 1. The utility model can recover the heat in ethylene glycol by setting a heat exchange device, and at the same time can recover the heat emitted by ethylene glycol again through a heat dissipation device, thereby recovering the heat in ethylene glycol more comprehensively and improving the heat recovery rate.

[0013] 2. The utility model can reduce the heat dissipation outward through the inner box by providing a heat-insulating layer, and the spray device can mix the upper and lower heat of the ethylene glycol in the inner box. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an overall cross-sectional structural diagram of an ethylene glycol distillation waste heat recovery and treatment device of the present utility model;

[0015] Figure 2 This is a structural diagram of the heat dissipation device at the upper end of the inner box of an ethylene glycol distillation waste heat recovery and treatment device of the utility model;

[0016] Figure 3 for Figure 1 A three-dimensional view of the middle partition;

[0017] Figure 4 This is a distribution diagram of the spray device in the inner box.

[0018] Among them, 1. outer box, 2. partition, 3. air vent, 4. inner box, 5. liquid inlet pipe, 6. liquid drain pipe, 7. heat dissipation device, 8. spray device, 9. heat exchange device, 10. heat exchange coil, 11. water inlet valve, 12. drain valve, 13. exhaust fan, 14. cover, 15. heat dissipation valve, 16. circulation pipe, 17. water spray plate, 18. circulation pump, 19. insulation layer, 20. observation window, 21. temperature sensor. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0021] like Figure 1-4 The utility model discloses a device for recovering and processing waste heat from distillation of ethylene glycol, comprising an outer box 1, a partition 2 is provided on the inner wall of the outer box 1, an air vent 3 is provided in the partition 2, an inner box 4 is provided on the partition 2, and an observation window 20 is provided at the horizontal position on the same side of the outer box 1 and the inner box 4, a temperature sensor 21 is provided in the inner box 4, and an insulation layer 19 is provided on the inner wall of the inner box 4, which can well prevent the heat of the ethylene glycol solution in the inner box 4 from dissipating outward, a liquid inlet pipe 5 is provided at the upper end of the inner box 4 and passes through the top wall of the outer box 1, a liquid discharge pipe 6 is provided at the lower end of the inner box 4 and passes through the bottom wall of the outer box 1, a heat dissipation device 7 is provided on the outer box 1, a heat exchange device 9 is provided in the inner box 4 and comes out from the side wall of the outer box 1, and a spraying device 8 is provided in the inner box 4.

[0022] like Figure 1 The heat exchange device 9 includes a heat exchange coil 10, which is located inside the inner box 4 and arranged in an up and down manner. The heat exchange coil 10 is provided with an inlet valve 11 and a drain valve 12. Cold water enters through the inlet valve 11, absorbs heat through the heat exchange coil 10, and is discharged from the drain valve 12.

[0023] like Figure 1-3 The heat dissipation device 7 includes an exhaust fan 13, which is arranged between the inner box 4 and the outer box 1. The exhaust fan 13 is connected to a heat dissipation valve 15. The other end of the exhaust fan 13 is connected to a cover 14. The heat between the outer box 1 and the inner box 4 is extracted by the exhaust fan 13 and can be circulated through the air vents 3, so that the heat between the outer box 1 and the inner box 4 can be discharged.

[0024] like Figure 4The spraying device 8 includes a circulation pipe 16, one end of the circulation pipe 16 is located at the bottom of the inner box 4 and the other end is located at the top of the inner box 4. A circulation pump 18 is provided on the circulation pipe 16, and the upper end of the circulation pipe 16 is connected to a water sprinkling plate 17. The ethylene glycol in the inner box 4 can be circulated up and down through the water sprinkling plate 17, so that the heat from the upper and lower parts is evenly absorbed by the heat exchange coil 10.

[0025] During specific use, the ethylene glycol distilled solution is introduced into the inner box 4 through the liquid inlet pipe 5, and cold water is introduced through the water inlet valve 11. The cold water absorbs the heat in the ethylene glycol through the heat exchange coil 10 and is discharged through the drain valve 12 to realize the recovery of the heat in the ethylene glycol. When the heat in the ethylene glycol is recovered, the circulation pump 18 and the circulation pipe 16 can mix the ethylene glycol in the inner box 4 up and down to make the temperature uniform.

[0026] An insulation layer 19 is provided on the inner side of the inner box 4. The insulation layer 19 can reduce the heat dissipated outward from the ethylene glycol. Even if some heat is dissipated between the outer box 1 and the inner box 4, the heat will be circulated into the cover body 14 through the air vents 3 between the partitions 2 through the exhaust fan 13, and discharged through the heat dissipation valve 15, which can further recover the heat, thereby fully recovering the heat in the ethylene glycol.

[0027] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. An ethylene glycol distillation waste heat recovery device, comprising an outer box, characterized in that: A partition is provided on the inner wall of the outer box, and an air vent is provided in the partition. An inner box is provided on the partition, and a liquid inlet pipe is provided at the upper end of the inner box and passes through the top wall of the outer box. A liquid discharge pipe is provided at the lower end of the inner box and passes through the bottom wall of the outer box. A heat dissipation device is provided on the outer box, a heat exchange device is provided in the inner box and comes out from the side wall of the outer box, and a spray device is provided in the inner box.

2. The ethylene glycol distillation waste heat recovery device according to claim 1, characterized in that: The heat exchange device includes a heat exchange coil, which is located inside the inner box and arranged in an up-and-down manner. A water inlet valve and a drain valve are provided on the heat exchange coil.

3. The ethylene glycol distillation waste heat recovery device according to claim 2, characterized in that: The heat dissipation device includes an exhaust fan, which is arranged between the inner box and the outer box. The exhaust fan is connected to a heat dissipation valve, and the other end of the exhaust fan is connected to a cover.

4. The ethylene glycol distillation waste heat recovery device according to claim 3, characterized in that: The spray device includes a circulation pipe, one end of which is located at the bottom of the inner box and the other end is located at the top of the inner box. A circulation pump is provided on the circulation pipe, and the upper end of the circulation pipe is connected to a water spraying plate.

5. The ethylene glycol distillation waste heat recovery device according to claim 4, characterized in that: A heat-insulating layer is provided on the inner wall of the inner box.

6. The ethylene glycol distillation waste heat recovery device according to claim 5, characterized in that: Observation windows are provided at the same horizontal position of the outer box and the inner box.

7. The ethylene glycol distillation waste heat recovery device according to claim 6, characterized in that: A temperature sensor is provided in the inner box.

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