Ethylene glycol rectification waste heat recovery processing device

Abstract

The utility model relates to the field of ethylene glycol rectification, and discloses an ethylene glycol rectification waste heat recovery processing device which comprises a heating barrel, the top end of the heating barrel is fixedly connected with a top cover, the top side of the top cover is externally and fixedly connected with a connecting pipe, and the side, away from the connecting pipe, of the periphery of the top side of the top cover is fixedly connected with a feeding pipe. A containing barrel is arranged in the heating barrel, the bottom end of the connecting pipe and the bottom end of the feeding pipe communicate with the containing barrel, and a rotating assembly is arranged in the containing barrel. The collecting barrel is used for collecting condensed ethylene glycol, a condensation pipe is arranged at the top end of the collecting barrel, the top end of the condensation pipe is fixedly connected to the bottom end of the left side of the connecting pipe, and a fixing frame is fixedly connected to the outer wall of the condensation pipe. According to the utility model, the mixture can be uniformly heated and the heating efficiency of the mixture can be improved by stirring the mixture of ethylene glycol and other liquid with the boiling point higher than that of ethylene glycol in the heating process, so that the evaporation efficiency of ethylene glycol is accelerated.

Description

Technical Field

[0001] The utility model relates to the field of ethylene glycol distillation, in particular to an ethylene glycol distillation waste heat recovery and treatment device. 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] Existing heating methods for distilling ethylene glycol generally include direct heating and indirect heating. When using steam to indirectly distill ethylene glycol, the heating efficiency of the outside of the ethylene glycol is often faster than the heating efficiency of the inside, which causes uneven heating of the inside and outside of the ethylene glycol, thereby reducing the steam efficiency of the ethylene glycol. In response to this technical problem, this application proposes an ethylene glycol distillation waste heat recovery and treatment device. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a device for recovering and processing waste heat from ethylene glycol distillation. By stirring the mixture of ethylene glycol and other liquids having a boiling point higher than that of ethylene glycol during the heating process, the mixture can be heated evenly, the heating efficiency of the mixture can be improved, and the evaporation efficiency of the ethylene glycol can be accelerated. By circulating the high-temperature steam in the heating barrel, the utilization rate of the high-temperature steam can be improved, the loss of energy can be reduced, and the production cost can be saved. By cooling the ethylene glycol steam, the ethylene glycol steam can be converted into ethylene glycol liquid, thereby facilitating the collection of the ethylene glycol.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An ethylene glycol distillation waste heat recovery and processing device, comprising:

[0007] A heating barrel, wherein the top of the heating barrel is fixedly connected to a top cover, a connecting pipe is fixedly connected to the outside of the top side of the top cover, a feeding pipe is fixedly connected to the side of the outer periphery of the top side of the top cover away from the connecting pipe, a holding barrel is provided inside the heating barrel, the bottom ends of the connecting pipe and the feeding pipe are both connected to the holding barrel, a rotating assembly is provided inside the holding barrel, a waste liquid pipe is fixedly connected to the outer wall of the heating barrel, and the waste liquid pipe is connected to the holding barrel;

[0008] A collecting barrel for collecting condensed ethylene glycol, wherein a condensing tube is provided at the top of the collecting barrel, the top of the condensing tube is fixedly connected to the bottom end of the left side of the connecting tube, the outer wall of the condensing tube is fixedly connected to a fixing frame, and the right end of the fixing frame is fixedly connected to the side of the outer wall of the heating barrel away from the waste liquid pipe.

[0009] Furthermore, the rotating assembly includes a rotating rod located inside the barrel, a plurality of rotating blades are fixedly connected to the outer wall of the bottom end of the rotating rod, the top end of the rotating rod is rotatably connected to the top cover, and a motor is installed at the middle end of the top side of the top cover, and the driving end of the motor is fixedly connected to the top end of the rotating rod.

[0010] Furthermore, a first pipe is provided on the outer wall of the top end of the condenser tube, and a second pipe is provided on the outer wall of the bottom end of the condenser tube.

[0011] Furthermore, a pump body is provided on the outer wall of the heating barrel, and a steam input port is provided on the bottom end of the outer wall of the heating barrel away from the pump body. The input end of the pump body is connected to the bottom side of the heating barrel, and the output end of the pump body is connected to the top side of the heating barrel.

[0012] Furthermore, a drain pipe is fixedly connected to the bottom end of the heating barrel, and a collection box is provided on the bottom side of the drain pipe.

[0013] Furthermore, the bottom end of the waste liquid pipe is fixedly connected to the top side of the collection box.

[0014] Furthermore, the bottom ends of the heating barrel and the collecting barrel are fixedly connected with a plurality of brackets.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the present invention, by stirring the mixture of ethylene glycol and other liquids with a higher boiling point than ethylene glycol during the heating process, the mixture can be heated evenly, the heating efficiency of the mixture can be improved, and the evaporation efficiency of the ethylene glycol can be accelerated.

[0017] 2. In the utility model, by circulating the high-temperature steam in the heating barrel, the utilization rate of the high-temperature steam can be improved, the energy loss can be reduced, and the production cost can be saved. By cooling the ethylene glycol vapor, the ethylene glycol vapor can be converted into ethylene glycol liquid, thereby facilitating the collection of ethylene glycol. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of an ethylene glycol distillation waste heat recovery and treatment device proposed by the present invention;

[0019] Figure 2 This is a structural schematic diagram of a heating barrel of an ethylene glycol distillation waste heat recovery and treatment device proposed in the utility model;

[0020] Figure 3 This is a structural schematic diagram of a rotating rod of an ethylene glycol distillation waste heat recovery and treatment device proposed in the utility model.

[0021] Legend:

[0022] 1. Heating barrel; 2. Collecting barrel; 3. Connecting pipe; 4. Motor; 5. Feeding pipe; 6. Waste liquid pipe; 7. Collecting box; 8. Pump body; 9. Bracket; 10. Fixing frame; 11. Condenser tube; 12. Container; 13. Rotating rod; 14. Rotating blade. DETAILED DESCRIPTION

[0023] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0024] Reference Figure 1-3 The present invention provides an embodiment of a device for recovering waste heat from distillation of ethylene glycol, comprising:

[0025] The heating barrel 1 has a top cover fixedly connected to the top of the heating barrel 1, a connecting pipe 3 fixedly connected to the top side of the top cover, and a feed pipe 5 fixedly connected to the side of the top side of the top cover away from the connecting pipe 3. The feed pipe 5 can be used to transport a mixture of ethylene glycol and other liquids with a higher boiling point than ethylene glycol into the holding barrel 12. The heating barrel 1 is provided with a holding barrel 12 inside. The bottom ends of the connecting pipe 3 and the feed pipe 5 are both connected to the holding barrel 12. The vapor of ethylene glycol evaporated in the holding barrel 12 enters the condenser 11 from the connecting pipe 3. For condensation, a rotating rod 13 is provided in the holding barrel 12, and a plurality of rotating blades 14 are fixedly connected to the outer wall of the bottom end of the rotating rod 13. By rotating the rotating rod 13, which can be a plurality of rotating blades 14, the mixture is stirred, so that the mixture is heated evenly and the evaporation efficiency of the ethylene glycol in the mixture is accelerated. The top end of the rotating rod 13 is rotatably connected to the top cover, and a motor 4 is installed at the middle end of the top side of the top cover. The driving end of the motor 4 is fixedly connected to the top end of the rotating rod 13. The rotating rod 13 can be driven to rotate by the motor 4. The outer wall of the heating barrel 1 is fixedly connected to the waste The liquid pipe 6 and the waste liquid pipe 6 are connected to the holding barrel 12. When the ethylene glycol in the holding barrel 12 is evaporated, the remaining liquid is discharged from the waste liquid pipe 6 into the collection box 7. The outer wall of the heating barrel 1 is also provided with a steam input port. The outer wall of the heating barrel 1 is away from the steam input port. A pump body 8 is also provided on the side of the outer wall of the heating barrel 1 away from the steam input port. The input end of the pump body 8 is connected to the bottom side of the heating barrel 1, and the output end of the pump body 8 is connected to the top side of the heating barrel 1. High-temperature steam can be transported to the interior of the heating barrel 1 through the steam input port, and the heating barrel 1 can be made to The internal steam forms a cycle, thereby reducing the waste of steam temperature and lowering energy consumption. A drain pipe is fixedly connected to the bottom end of the heating barrel 1. When high-temperature steam forms water droplets on the inner wall of the heating barrel 1, these water droplets can be discharged from the heating barrel 1 through the drain pipe. A collection box 7 is provided on the bottom side of the drain pipe. The bottom end of the waste liquid pipe 6 is fixedly connected to the top side of the collection box 7. The waste liquid in the storage barrel 12 and the water droplets in the heating barrel 1 can be collected centrally through the collection box 7, thereby facilitating the subsequent centralized treatment of these liquids by the staff;

[0026] A collecting barrel 2 is used to collect condensed ethylene glycol. A condenser 11 is provided at the top of the collecting barrel 2. The condenser 11 can condense ethylene glycol vapor, turning ethylene glycol vapor from gas into liquid to facilitate the collection of ethylene glycol. A pipe 1 is provided on the outer wall of the top of the condenser 11. Pipe 1 can be set as a water inlet. Pipe 2 is provided on the outer wall of the bottom end of the condenser 11. Pipe 2 can be set as a water outlet. A water pump is used to transport low-temperature water or coolant into the water inlet, and then the low-temperature water or coolant is discharged from the water outlet, so as to achieve a cooling effect on the condenser 11. The top of the condenser 11 is fixedly connected to the left bottom end of the connecting pipe 3, and the outer wall of the condenser 11 is fixedly connected to a fixing frame 10. The right end of the fixing frame 10 is fixedly connected to the side of the outer wall of the heating barrel 1 away from the waste liquid pipe 6. The condenser 11 can be fixed by the fixing frame 10. The bottom ends of the heating barrel 1 and the collecting barrel 2 are fixedly connected to multiple brackets 9.

[0027] Working principle: First, a mixture of ethylene glycol and other liquids with a boiling point higher than ethylene glycol is transported from the feed pipe 5 into the holding barrel 12, and then the high-temperature steam is transported to the heating barrel 1 through the steam input port. The high-temperature steam in the heating barrel 1 can be circulated through the pump body 8, thereby improving the utilization rate of the high-temperature steam. The ethylene glycol vapor evaporated from the holding barrel 12 enters the condenser 11 through the connecting pipe 3. After being cooled by the condenser 11, the ethylene glycol vapor becomes liquid ethylene glycol, which can be collected through the collecting barrel 2. The remaining waste liquid in the holding barrel 12 enters the collecting box 7 through the waste liquid pipe 6, and the water droplets formed by the high-temperature steam in the heating barrel 1 also enter the collecting box 7, thereby centrally collecting the waste liquid and water droplets, making it convenient for the staff to subsequently centrally process these liquids.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An ethylene glycol distillation waste heat recovery device, characterized in that: include: A heating barrel (1), wherein the top of the heating barrel (1) is fixedly connected to a top cover, the top side of the top cover is fixedly connected to a connecting pipe (3), the outer periphery of the top side of the top cover away from the connecting pipe (3) is fixedly connected to a feeding pipe (5), a holding barrel (12) is provided inside the heating barrel (1), the bottom ends of the connecting pipe (3) and the feeding pipe (5) are both connected to the holding barrel (12), a rotating assembly is provided inside the holding barrel (12), a waste liquid pipe (6) is fixedly connected to the outer wall of the heating barrel (1), and the waste liquid pipe (6) is connected to the holding barrel (12); A collecting barrel (2) for collecting condensed ethylene glycol, wherein a condensing tube (11) is provided at the top of the collecting barrel (2), the top of the condensing tube (11) is fixedly connected to the bottom end of the left side of the connecting tube (3), the outer wall of the condensing tube (11) is fixedly connected to a fixing frame (10), and the right end of the fixing frame (10) is fixedly connected to the outer wall of the heating barrel (1) on the side away from the waste liquid pipe (6).

2. The ethylene glycol distillation waste heat recovery device according to claim 1, characterized in that: The rotating assembly comprises a rotating rod (13) located inside the containing barrel (12), a plurality of rotating blades (14) are fixedly connected to the outer wall of the bottom end of the rotating rod (13), the top end of the rotating rod (13) is rotatably connected to the top cover, and a motor (4) is installed at the middle end of the top side of the top cover, and the driving end of the motor (4) is fixedly connected to the top end of the rotating rod (13).

3. The ethylene glycol distillation waste heat recovery device according to claim 1, characterized in that: The outer wall of the top end of the condenser tube (11) is provided with a pipe 1, and the outer wall of the bottom end of the condenser tube (11) is provided with a pipe 2.

4. The ethylene glycol distillation waste heat recovery device according to claim 1, characterized in that: The outer wall of the heating barrel (1) is further provided with a pump body (8), and a steam input port is provided at the bottom end of the outer wall of the heating barrel (1) away from the pump body (8), the input end of the pump body (8) is connected to the bottom side of the heating barrel (1), and the output end of the pump body (8) is connected to the top side of the heating barrel (1).

5. The ethylene glycol distillation waste heat recovery device according to claim 1, characterized in that: The bottom end of the heating barrel (1) is fixedly connected to a drainage pipe, and a collection box (7) is provided on the bottom side of the drainage pipe.

6. The ethylene glycol distillation waste heat recovery device according to claim 1, characterized in that: The bottom end of the waste liquid pipe (6) is fixedly connected to the top side of the collection box (7).

7. The ethylene glycol distillation waste heat recovery device according to claim 1, characterized in that: The bottom ends of the heating barrel (1) and the collecting barrel (2) are both fixedly connected to a plurality of brackets (9).

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