Waste ethylene glycol treatment device

Abstract

The utility model relates to a waste ethylene glycol treatment device which comprises a transfer tank, a first medium conveying assembly and a second medium conveying assembly, wherein a first jacket is arranged outside the transfer tank; a first outlet of the transfer tank is communicated with the waste ethylene glycol take-out tank, a second outlet of the transfer tank is communicated with the tail gas tank, and a second jacket is arranged outside a second communicating pipeline; the first medium conveying assembly comprises a first pipeline, a second pipeline and a first medium source, the first pipeline is communicated with the first medium source and the first jacket, and the second pipeline is communicated with the first jacket and the first medium recycling container; the second medium conveying assembly comprises a third pipeline, a fourth pipeline and a second medium source, the third pipeline is communicated with the first pipeline, the second medium source and the second clamping sleeve, and the fourth pipeline is communicated with the second pipeline and the second medium recycling container. According to the waste ethylene glycol treatment device provided by the utility model, waste ethylene glycol in the transfer tank is heated or cooled, and the treated waste ethylene glycol can be quickly conveyed to the take-out tank, so that the time is saved, and the safety is high.

Description

Technical Field

[0001] This utility model relates to a waste ethylene glycol treatment device. Background Technology

[0002] The polyester ethylene glycol distillation unit generates approximately 5 tons of waste ethylene glycol per week, with a maximum storage capacity of about 30 tons in the waste ethylene glycol delivery tanks. The waste ethylene glycol is consistently at a high temperature, around 150°C, and the receiving cycle is approximately one week, during which the temperature only drops by about 5°C. However, the delivery containers used by the manufacturers are plastic bulk containers. To meet safety and hazardous chemical storage requirements, personnel must wear high-temperature protective clothing and spend considerable time transferring the waste ethylene glycol to the delivery manufacturers' containers, followed by waiting for it to cool naturally within the containers. Therefore, each delivery wastes a significant amount of time and effort, and in some cases, insufficient cooling time may prevent timely delivery. Furthermore, waste ethylene glycol has a low freezing point and readily solidifies in cold weather, making it difficult to transfer to the delivery manufacturers' containers. Utility Model Content

[0003] The purpose of this invention is to provide a waste ethylene glycol treatment device.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A waste ethylene glycol treatment device includes a transfer tank, a first medium conveying assembly, and a second medium conveying assembly. The transfer tank is provided with a first jacket, and the first jacket and the transfer tank form a medium cavity. The transfer tank has a first outlet and a second outlet. The first outlet is connected to a waste ethylene glycol delivery tank through a first connecting pipe, and the second outlet is connected to a tail gas tank through a second connecting pipe. At least a portion of the second connecting pipe is provided with a second jacket, and the second jacket and the second connecting pipe form a medium cavity.

[0006] The first medium conveying assembly includes a first pipeline, a second pipeline, and a first medium source. The first pipeline is connected to the first medium source and the first jacket inlet. The second pipeline is connected to the first jacket outlet and the first medium recovery container. The first medium source is used to provide the first medium.

[0007] The second medium delivery assembly includes a third pipeline, a fourth pipeline, and a second medium source. The third pipeline is connected to the first pipeline, the second medium source, and the second jacket inlet. The fourth pipeline is connected to the second pipeline and the second medium recovery container. The fourth pipeline is connected to the second jacket outlet via a third connecting pipeline. The second medium source is used to provide the second medium. A first valve is provided on the first pipeline, a second valve is provided on the second pipeline, a third valve is provided on the third pipeline, and a fourth valve is provided on the fourth pipeline.

[0008] According to some embodiments of this utility model, the device further includes a stirring assembly, which includes a stirring shaft, spiral blades, a first support member, and a second support member. At least a portion of the stirring shaft, the spiral blades, the first support member, and the second support member are disposed within the storage tank. The first support member is connected to the lower end of the stirring shaft, and the second support member is connected to the stirring shaft and located above the first support member. The opposite ends of the blades are respectively connected to the first support member and the second support member. The spiral blades are spirally distributed around the central axis of the stirring shaft. A gap is maintained between the spiral blades and the stirring shaft.

[0009] According to some embodiments of this utility model, the first support member and the second support member both include an annular member and a connecting rod. The annular member is sleeved outside the stirring shaft, and a gap is maintained between the inner circumference of the annular member and the stirring shaft. The two opposite ends of the connecting rod are respectively connected to the annular member and the stirring shaft.

[0010] According to some embodiments of this utility model, a plurality of spiral blades are provided, one end of the plurality of spiral blades is distributed circumferentially along the annular part of the first support member, and the other end of the plurality of spiral blades is distributed circumferentially along the annular part of the second support member.

[0011] According to some embodiments of this utility model, multiple connecting rods are provided, and the multiple connecting rods are arranged radially along the annular member.

[0012] According to some embodiments of this utility model, the device further includes a third jacket, a fifth pipeline, and a sixth pipeline. The third jacket is disposed at the bottom of the transfer tank, and the third jacket and the transfer tank form a medium cavity. The first jacket is disposed on the outer periphery of the transfer tank, and the first jacket and the third jacket are independent of each other. The fifth pipeline is connected to the inlet of the first pipeline and the third jacket, and the sixth pipeline is connected to the outlet of the third jacket, the first medium recovery container, and the fourth pipeline.

[0013] According to some embodiments of the present invention, the device further includes a filter assembly disposed on the first connecting pipe, and the filter assembly is located between the transfer tank and the waste glycol takeaway tank.

[0014] According to some embodiments of this utility model, the filter assembly includes a filter container, in which a first filter screen extending vertically is disposed, such that the filter container is divided into a first cavity and a second cavity. The first cavity is connected to the first connecting pipe. The second filter screen is disposed in the first cavity and is horizontally arranged. An inlet is provided at the upper part of the first cavity, and a first outlet is provided at the bottom of the first cavity. The first outlet is located below the second filter screen and is used to discharge filtered ethylene glycol. A second outlet is provided at the bottom of the second cavity.

[0015] According to some embodiments of this utility model, the first outlet is provided with a first discharge pipe and a second discharge pipe that are connected to each other. The second discharge pipe is located below the first discharge pipe. The first discharge pipe has a structure that is wider at the top and narrower at the bottom. The diameter of the second discharge pipe is the same.

[0016] According to some embodiments of this utility model, the second outlet is provided with a third discharge pipe and a fourth discharge pipe that are connected to each other. The fourth discharge pipe is located below the third discharge pipe. The third discharge pipe has a structure that is wider at the top and narrower at the bottom. The diameter of the fourth discharge pipe is the same.

[0017] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0018] The waste ethylene glycol treatment device provided by this utility model, by setting up a transfer tank, a first medium conveying component, and a second medium conveying component, heats or cools the waste ethylene glycol in the transfer tank. The treated waste ethylene glycol can be quickly transported to the waste ethylene glycol delivery tank, reducing manpower, saving a lot of time, and ensuring high safety. The second outlet of the transfer tank is connected to the tail gas tank through a second connecting pipe. At least part of the second connecting pipe is provided with a second jacket. The second jacket and the second connecting pipe form a medium cavity, which can cool the harmful tail gas to form liquid, reducing the emission of harmful tail gas. Attached Figure Description

[0019] Appendix Figure 1 Structural diagram of the waste ethylene glycol treatment device provided by this utility model;

[0020] Appendix Figure 2 A structural diagram of the stirring assembly of the waste ethylene glycol treatment device provided by this utility model from a first-view perspective;

[0021] Appendix Figure 3 A structural diagram of the stirring assembly of the waste ethylene glycol treatment device provided by this utility model from a second perspective;

[0022] Appendix Figure 4 A third-view structural diagram of the stirring assembly of the waste ethylene glycol treatment device provided by this utility model;

[0023] Appendix Figure 5 A structural diagram of the stirring assembly of the waste ethylene glycol treatment device provided by this utility model from a fourth perspective;

[0024] Appendix Figure 6 A first-view structural diagram of the filter assembly of the waste ethylene glycol treatment device provided by this utility model;

[0025] Appendix Figure 7 A structural diagram of the filter assembly of the waste ethylene glycol treatment device provided by this utility model from a second perspective;

[0026] Appendix Figure 8 A third-view structural diagram of the filter assembly of the waste ethylene glycol treatment device provided by this utility model;

[0027] Appendix Figure 9 The fourth-view structural diagram of the filter assembly of the waste ethylene glycol treatment device provided by this utility model.

[0028] In the attached diagrams above:

[0029] 1-Transfer tank; 2-First jacket; 3-Waste ethylene glycol delivery tank; 4-First connecting pipeline; 5-Tail gas tank; 6-Second connecting pipeline; 7-Second jacket; 8-First pipeline; 9-First valve; 10-Second pipeline; 11-Second valve; 12-First medium source; 13-Third pipeline; 14-Third valve; 15-Fourth pipeline; 16-Fourth valve; 17-Stirring shaft; 18-Helical blade; 19-First support component; 19 1-Annular component; 192-Connecting rod; 20-Second support component; 21-Third jacket; 22-Fifth pipeline; 23-Sixth pipeline; 24-Filter container; 25-First filter screen; 26-Second filter screen; 27-First discharge pipe; 28-Second discharge pipe; 29-Third discharge pipe; 30-Fourth discharge pipe; 31-Third connecting pipeline; 32-First media recovery container; 33-Second media recovery container; 34-Second media source. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] See Figures 1 to 9 The waste ethylene glycol treatment device shown includes a transfer tank 1, a first medium conveying assembly, and a second medium conveying assembly, wherein:

[0033] The transfer tank 1 includes a tank body and a bottom cap located below the tank body. The bottom cap is in the shape of a concave bowl. A first jacket 2 is provided outside the tank body of the transfer tank 1. The first jacket 2 is arranged around the outer periphery of the tank body, and the first jacket 2 and the transfer tank 1 form a medium flow cavity for the medium to flow in and be stored.

[0034] The transfer tank 1 has a first outlet and a second outlet. The first outlet of the transfer tank 1 is connected to the waste ethylene glycol takeaway tank 3 through a first connecting pipe 4. The second outlet of the transfer tank 1 is connected to the tail gas tank 5 through a second connecting pipe 6. The second connecting pipe 6 is at least partially provided with a second jacket 7. The second jacket 7 and the corresponding second connecting pipe 6 form a medium cavity.

[0035] The first medium conveying assembly includes a first pipeline 8 and a second pipeline 10. The two ends of the first pipeline 8 are respectively connected to the first medium source 12 and the inlet of the first jacket 2. The first medium source 12 is used to provide a first medium to the first jacket 2, which may be steam. The second pipeline 10 is connected to the outlet of the first jacket 2 and the first medium recovery container 32.

[0036] The second medium delivery assembly includes a third pipe 13 and a fourth pipe 15. The third pipe 13 is connected to the first pipe 8, the second medium source 34, and the inlet of the second jacket 7. The second medium source 34 is used to provide the second medium, which can be condensate. The fourth pipe 15 is connected to the second pipe 10 and the second medium recovery container 33. The fourth pipe 15 is connected to the outlet of the second jacket 7 via a third connecting pipe 31. The exhaust gas (such as acetaldehyde, which has a low boiling point) discharged from the second outlet of the transfer tank 1 is cooled into liquid when it passes through the second connecting pipe 6 corresponding to the second jacket 7. The liquid flows into the exhaust gas tank to prevent the acetaldehyde exhaust gas from being discharged into the atmosphere. The condensate is then transported to the second medium recovery container 33 for collection via the third connecting pipe 31.

[0037] In some embodiments, the device further includes a third jacket 21, a fifth pipeline 22, and a sixth pipeline 23. The third jacket 21 is located at the bottom of the transfer tank 1, forming a medium cavity with the transfer tank 1. The third jacket 21 covers part of the outside of the transfer tank 1 and the bottom cap. The first jacket 2 and the third jacket 21 are independent of each other. The fifth pipeline 22 is connected to the first pipeline 8 and the inlet of the third jacket 21. The sixth pipeline 23 is connected to the outlet of the third jacket 21, the first medium recovery container 32, and the fourth pipeline 15. The second medium can enter the first jacket 2 through the third pipeline 13 and the first pipeline 8, and then enter the second medium recovery container 33 through the second pipeline 10 and the fourth pipeline 15. Alternatively, the second medium can enter the third jacket 21 through the fifth pipeline 22 and then enter the second medium recovery container 33 through the sixth pipeline 23 and the fourth pipeline 15. The two media share some pipelines, saving costs. By setting up the first jacket 2 and the third jacket 21, the heating or cooling effect of the transfer tank 1 can be more prominent, the required time can be reduced, and the efficiency can be increased.

[0038] In this example, a first valve 9 is installed on the first pipeline 8, a second valve 11 is installed on the second pipeline 10, and a third valve 14 is installed on the third pipeline 13. The third valve 14 is used to control the opening and closing of the third pipeline 13. A fourth valve 16 is installed on the fourth pipeline 15, and the fourth valve 16 is used to control the opening and closing of the fourth pipeline 15. When conveying a medium, if the third valve 14 and the fourth valve 16 are opened, part of the second medium enters the first jacket 2 from the third pipeline 13 and the first pipeline 8, and then enters the second medium recovery container 33 from the fourth pipeline 15; part of the second medium enters the third jacket 21 from the third pipeline 13 and the fifth pipeline 22, and then enters the second medium recovery container 33 from the sixth pipeline 23 and the fourth pipeline 15. At this time, the first medium is not conveyed. The third valve 14 and the fourth valve 16 are set to enable the second medium to be conveyed to the first jacket 2 and the third jacket 21 (at this time, the first medium is stopped from being conveyed), preventing the two media from being cross-contaminated.

[0039] In this example, there are two first valves 9. The middle part of the first pipeline 8 is connected to the third pipeline 13, so that the first pipeline 8 is divided into a first section and a second section that are connected. One end of the first section is connected to the first medium source 12, and one end of the second section is connected to the inlet of the first jacket 2. One first valve 9 is located in the first section of the first pipeline 8, and the other first valve 9 is located in the second section of the first pipeline 8. When the second medium source 34 is supplied, the first medium source 12 stops, that is, the first valve 9 located in the first section is closed.

[0040] In some embodiments, the device further includes a stirring assembly comprising a stirring shaft 17, helical blades 18, a first support 19, and a second support 20. At least a portion of the stirring shaft 17, the helical blades 18, the first support 19, and the second support 20 are disposed within the transfer tank 1. The first support 19 is connected to the lower end of the stirring shaft 17, and the second support 20 is connected to the stirring shaft 17 and located above the first support 19. A gap is maintained between the first support 19 and the second support 20. The opposite ends of the blades are connected to the first support 19 and the second support 20, respectively. The helical blades 18 are helically distributed along the axial direction of the stirring shaft 17, and the gap between the helical blades 18 and the stirring shaft 17 forms a shearing working area. The first support 19 and the second support 20 are used to support and fix the helical blades 18 and can increase the contact area with the liquid, resulting in more uniform and thorough stirring.

[0041] In some implementations, see Figure 2-5 Both the first support member 19 and the second support member 20 include an annular member 191 and a connecting rod 192. The annular member 191 is sleeved on the outside of the stirring shaft 17, and a gap is maintained between the inner circumference of the annular member 191 and the stirring shaft 17. The opposite ends of the connecting rod 192 are connected to the annular member 191 and the stirring shaft 17, respectively. A shearing working area is formed between the annular member 191, the connecting rod 192 and the stirring shaft 17, which increases the contact area with the liquid and makes the stirring more uniform.

[0042] In some embodiments, multiple helical blades 18 are provided. One end of the multiple helical blades 18 is distributed circumferentially along the annular part 191 of the first support member 19, and the other end of the multiple helical blades 18 is distributed circumferentially along the annular part 191 of the second support member 20. A gap is maintained between one end of two adjacent helical blades 18 and a gap is maintained between the other ends of two adjacent helical blades 18. Providing multiple helical blades 18 increases the contact area with the liquid, resulting in more uniform stirring.

[0043] In some embodiments, multiple connecting rods 192 are provided for the first support member 19, and the multiple connecting rods 192 are arranged radially along the annular member 191 of the first support member 19. Similarly, multiple connecting rods 192 are provided for the second support member 20, and the multiple connecting rods 192 are arranged radially along the annular member 191 of the second support member 20. The advantage of providing multiple connecting rods 192 is that the structure is more stable, and the contact area with the liquid is increased, resulting in more uniform stirring.

[0044] In a preferred embodiment, the waste ethylene glycol is heated or cooled and then filtered before being transported to the waste ethylene glycol takeaway tank 3. The filter assembly required for filtration is installed on the first connecting pipe 4 and is located between the transfer tank 1 and the waste ethylene glycol takeaway tank 3.

[0045] See Figure 6-9 The filter assembly includes a filter container 24, within which a first filter screen 25 extending vertically is disposed, dividing the filter container 24 into a first chamber and a second chamber. The front end of the first filter screen 25 is connected to the front inner wall of the filter container 24, and the rear end of the first filter screen 25 is connected to the rear inner wall of the filter container 24. A gap is maintained between the upper end of the first filter screen 25 and the upper part of the filter container 24. The first chamber and the second chamber are arranged in a left-right direction. The first chamber is connected to a first connecting pipe 4, and a second filter screen 26 is disposed within the first chamber. The second filter screen 26 is horizontally arranged, with one side of the second filter screen 26 connected to the first filter screen 25. A first outlet is provided at the bottom of the first chamber, with the inlet located above the first outlet and the first outlet located below the second filter screen 26. The first outlet is used to discharge waste ethylene glycol. A second outlet is provided at the bottom of the second chamber, used to discharge impurities remaining on the first filter screen 25 and the second filter screen 26. Waste ethylene glycol from transfer tank 1 enters the first chamber through the inlet of filter container 24. After being filtered through the first filter screen 25 and the second filter screen 26, the waste ethylene glycol flows out through the first outlet, while the second outlet is sealed to ensure thorough filtration. Once impurities accumulate to a certain level on the first filter screen 25 and the second filter screen 26, the operator enters the filter container 24 and discharges the impurities through the second outlet.

[0046] In a preferred embodiment, one of the front or rear ends of the first filter screen 25 is rotatably connected to the filter container 24. When impurities need to be cleaned, the first filter screen 25 can be rotated to facilitate the transfer of impurities to the second outlet.

[0047] See Figure 9The first outlet is provided with a first discharge pipe 27 and a second discharge pipe 28 that are connected to each other. The second discharge pipe 28 is located below the first discharge pipe 27. The first discharge pipe 27 has a structure that is wider at the top and narrower at the bottom, while the second discharge pipe 28 has the same diameter. The second outlet is provided with a third discharge pipe 29 and a fourth discharge pipe 30 that are connected to each other. The fourth discharge pipe 30 is located below the third discharge pipe 29. The third discharge pipe 29 has a structure that is wider at the top and narrower at the bottom, while the fourth discharge pipe 30 has the same diameter. The dimensions of the third discharge pipe 29 and the fourth discharge pipe 30 are larger than those of the first discharge pipe 27 and the second discharge pipe 28, which facilitates the flow of impurities through the second outlet.

[0048] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A waste ethylene glycol treatment device, characterized in that, The device includes a transfer tank, a first medium conveying assembly, and a second medium conveying assembly. The transfer tank is provided with a first jacket, which, together with the transfer tank, forms a medium cavity. The transfer tank has a first outlet and a second outlet. The first outlet is connected to a waste ethylene glycol delivery tank via a first connecting pipe, and the second outlet is connected to a tail gas tank via a second connecting pipe. At least a portion of the second connecting pipe is provided with a second jacket, which, together with the second connecting pipe, forms a medium cavity. The first medium conveying assembly includes a first pipeline, a second pipeline, and a first medium source. The first pipeline is connected to the first medium source and the first jacket inlet. The second pipeline is connected to the first jacket outlet and the first medium recovery container. The first medium source is used to provide the first medium. The second medium delivery assembly includes a third pipeline, a fourth pipeline, and a second medium source. The third pipeline is connected to the first pipeline, the second medium source, and the second jacket inlet. The fourth pipeline is connected to the second pipeline and the second medium recovery container. The fourth pipeline is connected to the second jacket outlet via a third connecting pipeline. The second medium source is used to provide the second medium. A first valve is provided on the first pipeline, a second valve is provided on the second pipeline, a third valve is provided on the third pipeline, and a fourth valve is provided on the fourth pipeline.

2. The waste ethylene glycol treatment device according to claim 1, characterized in that, The device further includes a stirring assembly, which includes a stirring shaft, helical blades, a first support member, and a second support member. At least a portion of the stirring shaft, the helical blades, the first support member, and the second support member are disposed within the storage tank. The first support member is connected to the lower end of the stirring shaft, and the second support member is connected to the stirring shaft and located above the first support member. The opposite ends of the blades are respectively connected to the first support member and the second support member. The helical blades are helically distributed around the central axis of the stirring shaft. A gap is maintained between the helical blades and the stirring shaft.

3. The waste ethylene glycol treatment device according to claim 2, characterized in that, Both the first support member and the second support member include an annular member and a connecting rod. The annular member is sleeved outside the stirring shaft, and a gap is maintained between the inner circumference of the annular member and the stirring shaft. The two opposite ends of the connecting rod are respectively connected to the annular member and the stirring shaft.

4. The waste ethylene glycol treatment device according to claim 3, characterized in that, The spiral blades are provided in multiple ways, with one end of each spiral blade distributed circumferentially along the annular part of the first support member, and the other end of each spiral blade distributed circumferentially along the annular part of the second support member.

5. The waste ethylene glycol treatment device according to claim 3, characterized in that, The connecting rods are provided in multiple ways, and the multiple connecting rods are arranged radially along the annular member.

6. The waste ethylene glycol treatment device according to claim 1, characterized in that, The device further includes a third jacket, a fifth pipeline, and a sixth pipeline. The third jacket is disposed at the bottom of the transfer tank, and the third jacket and the transfer tank form a medium cavity. The first jacket is disposed on the outer periphery of the transfer tank, and the first jacket and the third jacket are independent of each other. The fifth pipeline is connected to the inlet of the first pipeline and the third jacket, and the sixth pipeline is connected to the outlet of the third jacket, the first medium recovery container, and the fourth pipeline.

7. The waste ethylene glycol treatment device according to claim 1, characterized in that, The device also includes a filter assembly disposed on the first connecting pipe, and the filter assembly is located between the transfer tank and the waste glycol takeaway tank.

8. The waste ethylene glycol treatment device according to claim 7, characterized in that, The filter assembly includes a filter container, in which a first filter screen extending vertically is disposed, dividing the filter container into a first chamber and a second chamber. The first chamber is connected to the first connecting pipe. The second filter screen is disposed within the first chamber and is horizontally positioned. An inlet is provided at the upper part of the first chamber, and a first outlet is provided at the bottom of the first chamber, located below the second filter screen. The first outlet is used to discharge filtered ethylene glycol. A second outlet is provided at the bottom of the second chamber.

9. The waste ethylene glycol treatment device according to claim 7, characterized in that, The first outlet is provided with a first discharge pipe and a second discharge pipe that are connected to each other. The second discharge pipe is located below the first discharge pipe. The first discharge pipe has a structure that is wider at the top and narrower at the bottom. The diameter of the second discharge pipe is the same.

10. The waste ethylene glycol treatment device according to claim 7, characterized in that, The second outlet is provided with a third discharge pipe and a fourth discharge pipe that are connected to each other. The fourth discharge pipe is located below the third discharge pipe. The third discharge pipe has a structure that is wider at the top and narrower at the bottom. The diameter of the fourth discharge pipe is the same.

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