High-efficiency environment-friendly ethylene glycol recovery method and equipment

Abstract

The invention relates to the technical field of ethylene glycol recovery, and discloses high-efficiency environment-friendly ethylene glycol recovery equipment which comprises a collection bin. Ethylene glycol waste liquid is poured into the collection bin, then the first booster pump is driven to press the ethylene glycol waste liquid in the collection bin into the first security filter for filtration, and after filtration, the ethylene glycol waste liquid enters the second-stage electrodialysis device for separation to generate ethylene glycol primary liquid which enters the first storage bin; if yes, a rotating block is rotated to drive a rotating rod to rotate, the rotating rod is rotated to drive a large gear to rotate, the large gear is rotated to drive a rotating gear to rotate, and the rotating gear drives a threaded rod to rotate, so that the threaded rod moves out of a threaded groove in the upper end of the interior of the first security filter, a top cover is opened, and a filter element is taken out for replacement; the ethylene glycol recovery device is simple in structure and convenient to operate, and high efficiency of ethylene glycol recovery is guaranteed by quickly replacing the first security filter and the filter element of the first security filter.

Description

Technical Field

[0001] The invention relates to the technical field of ethylene glycol recovery, and in particular to a high-efficiency and environmentally friendly ethylene glycol recovery method and equipment. Background Art

[0002] Ethylene glycol is also known as glycol, 1,2-ethylene glycol, or EG for short. Its chemical formula is (CH2OH)2, and it is the simplest diol. Ethylene glycol is a colorless, odorless, sweet-tasting liquid with low toxicity to animals. Ethylene glycol is miscible with water and acetone, but has a lower solubility in ethers. It is used as a solvent, antifreeze, and raw material for synthetic polyester. Ethylene glycol's polymer polyethylene glycol (PEG) is a phase transfer catalyst and is also used for cell fusion; its nitrate ester is an explosive.

[0003] After searching, the invention patent announcement number is CN 105037095 B. The invention discloses a high-efficiency and environmentally friendly ethylene glycol recovery method, and the recovery steps are as follows: introducing ethylene glycol waste liquid into a collection box, and using a first booster pump to press the ethylene glycol waste liquid in the collection box into an ultrafiltration system through a first security filter; the ethylene glycol liquid coming out of the ultrafiltration system is sent to the first intermediate storage tank for ethylene glycol liquid; the ethylene glycol waste liquid in the first intermediate storage tank for ethylene glycol liquid is sent to the first-stage electrodialysis device through a second booster pump through a second security filter; at the same time, filtered water is sent to the first-stage electrodialysis device; the ethylene glycol initial liquid separated from the first-stage electrodialysis device is sent to the second intermediate storage tank; the ethylene glycol waste liquid in the second intermediate storage tank is sent to the second-stage electrodialysis device through a third booster pump through a third security filter; at the same time, filtered water is sent to the second-stage electrodialysis device; the ethylene glycol liquid decomposed from the second-stage electrodialysis device is sent to the ethylene glycol liquid storage tank. The invention adopts secondary electrodialysis to extract ethylene glycol waste liquid in a purer manner.

[0004] The safety filter of the high-efficiency and environmentally friendly ethylene glycol recovery equipment has been used for a long time, causing the filter element to become clogged. The existing safety filter is fixed by multiple bolts, which leads to slow efficiency in replacing the filter element and cannot achieve high-efficiency and environmentally friendly ethylene glycol recovery. Summary of the invention

[0005] The purpose of the present invention is to provide a high-efficiency and environmentally friendly ethylene glycol recovery method and equipment, which solves the problem proposed in the background technology that the filter element replacement efficiency is slow and the ethylene glycol cannot be recovered efficiently and environmentally friendly.

[0006] An embodiment of the present application provides a high-efficiency and environmentally friendly ethylene glycol recovery device, including a collecting bin, a first connecting pipe is fixedly connected to the right end of the collecting bin on the surface side, a first boosting pump is fixedly connected to the right end of the first connecting pipe on the surface side, a first safety filter is fixedly connected to the right end of the first connecting pipe on the surface side, a second-stage electrodialysis device is fixedly connected to the right end of the first connecting pipe on the surface side, a first storage bin is fixedly connected to the right end of the first storage bin on the surface side, a second connecting pipe is fixedly connected to the right end of the second connecting pipe on the surface side, a second boosting pump is fixedly connected to the right end of the second connecting pipe on the surface side, a second safety filter is fixedly connected to the right end of the second connecting pipe on the surface side, a second storage bin is fixedly connected to the right end of the second connecting pipe on the surface side, a first-stage electrodialysis device is fixedly connected to a limiting device on the upper surface of the first safety filter.

[0007] By adopting the above technical solution, the ethylene glycol waste liquid is poured into the collection bin, and then the first booster pump is driven to press the ethylene glycol waste liquid in the collection bin into the first security filter for filtration. After the filtration is completed, it enters the second-stage electrodialysis device for separation to produce ethylene glycol initial liquid which enters the first storage bin, and then the second booster pump is driven to press the ethylene glycol initial liquid in the first storage bin into the second security filter for filtration. After the filtration is completed, it enters the first-stage electrodialysis device for separation to produce ethylene glycol which enters the second storage bin. Long-term use causes the filter elements in the first and second security filters to become clogged, and the filter elements need to be cleaned. To replace, pull the pulling rod to drive the pulling column and the limiting column to be pulled out, the pulling column drives the moving plate to squeeze the spring, and the spring is squeezed through the moving plate and the fixed plate. When the limiting column moves out from the circular groove inside the rotating rod, and then the rotating plate rotates the limiting groove inside the limiting plate to limit the elastic force of the spring, the rotating block drives the rotating rod to rotate, the rotating rod drives the large gear to rotate, the large gear drives the rotating gear to rotate, and the rotating gear drives the threaded rod to rotate, so that the threaded rod moves out from the upper threaded groove inside the first safety filter, the top cover is opened, and the filter element is taken out for replacement.

[0008] Optionally, the upper surface end of the first security filter is movably connected with a connecting plate, the lower surface end of the connecting plate is fixedly connected with a top cover, the inner upper end of the top cover is rotatably connected with a rotating rod, the left surface end of the rotating rod is fixedly connected with a rotating block, the lower surface end of the rotating rod is fixedly connected with a large gear, the left surface end of the large gear is meshingly connected with a rotating gear, the inner upper end of the rotating gear is rotatably connected with a sliding wheel, the upper surface end of the sliding wheel is fixedly connected with a connecting column, the inner lower end of the rotating gear is threadedly connected with a threaded rod, and the inner lower end of the first security filter is fixedly connected with a filter element.

[0009] By adopting the above technical solution, the filter element can be quickly removed and replaced.

[0010] Optionally, the right end of the surface side of the limiting device is fixedly connected to a limiting plate, the inner lower end of the limiting device is fixedly connected to a fixed plate, the left end of the surface side of the fixed plate is fixedly connected to a spring, the left end of the surface side of the spring is fixedly connected to a movable plate, the inner lower end of the movable plate is slidably connected to a pulling column, the left end of the surface side of the pulling column is fixedly connected to the limiting column, the right end of the surface side of the pulling column is fixedly connected to a rotating disk, the right end of the surface side of the rotating disk is fixedly connected to the rotating plate, and the inner lower end of the rotating plate is fixedly connected to a pulling rod.

[0011] By adopting the above technical solution, the rotating rod is limited, so as to avoid the first safety filter and the second safety filter from being unreliable during use.

[0012] Optionally, a connecting plate is fixedly connected to the upper end of the surface of the connecting column.

[0013] By adopting the above technical solution, the connecting column is fixed to ensure the rotation of the rotating gear.

[0014] Optionally, the inner lower end of the fixing plate is slidably connected with a pulling column.

[0015] By adopting the above technical solution, the spring is ensured to be squeezed.

[0016] Optionally, a rotating groove is provided at the inner upper end of the rotating gear, and a thread groove begins to be provided at the inner middle end of the rotating gear.

[0017] By adopting the above technical solution, the usability of the parts is enhanced.

[0018] Optionally, there are two groups of the limiting plates, and the two groups of limiting plates surround each other with a limiting device distribution center.

[0019] By adopting the above technical solution, the overall practicality is enhanced and shaking during the limiting process is avoided.

[0020] Optionally, a limiting groove is provided at the inner upper end of the limiting plate.

[0021] By adopting the above technical solution, the elastic force of the spring is limited.

[0022] Optionally, a plurality of circular grooves are provided at the inner lower end of the rotating rod.

[0023] By adopting the above technical solution, the connectivity between the top cover and the first safety filter is strengthened.

[0024] The embodiment of the present application provides a high-efficiency and environmentally friendly ethylene glycol recovery method S1: pouring ethylene glycol waste liquid into a collecting bin, and then driving a first booster pump to press the ethylene glycol waste liquid in the collecting bin into a first security filter for filtration. After filtration is completed, the waste liquid enters a second-stage electrodialysis device for separation to produce ethylene glycol initial liquid, which enters the first storage bin. Then, driving a second booster pump to press the ethylene glycol initial liquid in the first storage bin into a second security filter for filtration. After filtration is completed, the waste liquid enters the first-stage electrodialysis device for separation to produce ethylene glycol, which enters the second storage bin, and the waste liquid ethylene glycol is recovered.

[0025] The embodiment of the present application provides a high-efficiency and environmentally friendly ethylene glycol recovery method S2: long-term use causes the internal filter elements of the first security filter and the second security filter to be clogged, and the filter elements need to be replaced, then the pulling rod is pulled to drive the pulling column and the limiting column to be pulled out, the pulling column drives the movable plate to squeeze the spring, and the spring is squeezed through the movable plate and the fixed plate, when the limiting column moves out from the internal circular groove of the rotating rod, and then the rotating plate rotates the internal limiting groove of the limiting plate to limit the elastic force of the spring, then the rotating block drives the rotating rod to rotate, the rotating rod drives the large gear to rotate, the rotating large gear drives the rotating gear to rotate, and the rotating gear drives the threaded rod to rotate, so that the threaded rod moves out from the upper threaded groove inside the first security filter, the top cover is opened, the filter element is taken out and replaced, and the top covers of the first security filter and the second security filter are quickly disassembled, which is convenient for users to quickly filter the filter element.

[0026] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0027] The technical solution of the present application is to pour the ethylene glycol waste liquid into the collection bin, and then drive the first booster pump to press the ethylene glycol waste liquid in the collection bin into the first security filter for filtration. After the filtration is completed, it enters the second-stage electrodialysis device for separation to produce ethylene glycol initial liquid, which enters the first storage bin. Then, drive the second booster pump to press the ethylene glycol initial liquid in the first storage bin into the second security filter for filtration. After the filtration is completed, it enters the first-stage electrodialysis device for separation to produce ethylene glycol which enters the second storage bin. Long-term use causes the filter elements in the first and second security filters to become clogged, and the filter elements need to be replaced. The pulling rod is pulled to drive the pulling column and the limiting column to be pulled out, and the pulling column drives The movable plate squeezes the spring, and the spring is squeezed by the movable plate and the fixed plate. When the limit column moves out from the circular groove inside the rotating rod, the rotating plate rotates the limiting groove inside the limiting plate to limit the elastic force of the spring, and the rotating block drives the rotating rod to rotate, and the rotating rod drives the large gear to rotate, and the large gear drives the rotating gear to rotate, and the rotating gear drives the threaded rod to rotate, so that the threaded rod moves out from the upper threaded groove inside the first safety filter, the top cover is opened, and the filter element is taken out and replaced. The structure is simple and easy to operate. By quickly replacing the first safety filter and the filter element of the first safety filter, high efficiency of ethylene glycol recovery is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0029] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency and environmentally friendly ethylene glycol recovery device of the present invention;

[0030] Figure 2 This is a schematic diagram of the internal parts structure of the first security filter of a high-efficiency and environmentally friendly ethylene glycol recovery device of the present invention;

[0031] Figure 3 This is a schematic diagram of the top cover structure of a high-efficiency and environmentally friendly ethylene glycol recovery device of the present invention;

[0032] Figure 4 This is a schematic diagram of the rotating gear structure of a high-efficiency and environmentally friendly ethylene glycol recovery device of the present invention;

[0033] Figure 5 The invention provides a high-efficiency and environmentally friendly ethylene glycol recovery device Figure 3 A schematic diagram of the structure enlargement in the middle;

[0034] Figure 6 This is a schematic diagram of the structure of a limiting device of a high-efficiency and environmentally friendly ethylene glycol recovery device of the present invention;

[0035] Figure 7 This is a schematic diagram of the connecting disk structure of a high-efficiency and environmentally friendly ethylene glycol recovery device of the present invention.

[0036] In the figure: 1. collecting bin; 2. first connecting pipe; 3. first boosting pump; 4. first safety filter; 401. top cover; 402. rotating rod; 403. rotating block; 404. threaded rod; 405. filter element; 406. large gear; 407. rotating gear; 408. connecting column; 409. connecting disk; 4010. sliding wheel; 5. limiting device; 501. limiting plate; 502. fixed plate; 503. spring; 504. moving plate; 505. limiting column; 506. pulling column; 507. rotating disk; 508. rotating plate; 509. pulling rod; 6. first storage bin; 7. second boosting pump; 8. second safety filter; 9. first-stage electrodialysis device; 10. second connecting pipe; 11. second storage bin; 12. second-stage electrodialysis device. DETAILED DESCRIPTION

[0037] See also Figure 1-7 The present invention provides a technical solution: a high-efficiency and environmentally friendly ethylene glycol recovery device, comprising a collecting bin 1, a first connecting pipe 2 is fixedly connected to the right end of the collecting bin 1, a first boosting pump 3 is fixedly connected to the right end of the first connecting pipe 2, a first security filter 4 is fixedly connected to the right end of the first connecting pipe 2, a second-stage electrodialysis device 12 is fixedly connected to the right end of the first connecting pipe 2, a first storage bin 6 is fixedly connected to the right end of the first storage bin 6, a second connecting pipe 10 is fixedly connected to the right end of the first storage bin 6, a second boosting pump 7 is fixedly connected to the right end of the second connecting pipe 10, a second security filter 8 is fixedly connected to the right end of the second connecting pipe 10, a second storage bin 11 is fixedly connected to the right end of the second connecting pipe 10, a first-stage electrodialysis device 9 is fixedly connected to the right end of the second connecting pipe 10, and a limiting device 5 is provided on the upper surface of the first security filter 4.

[0038] In the above technical scheme, the ethylene glycol waste liquid is poured into the collecting bin 1, and then the first booster pump 3 is driven to press the ethylene glycol waste liquid in the collecting bin 1 into the first security filter 4 for filtration. After the filtration is completed, it enters the second-stage electrodialysis device 12 for separation to produce ethylene glycol initial liquid, which enters the first storage bin 6. Then the second booster pump 7 is driven to press the ethylene glycol initial liquid in the first storage bin 6 into the second security filter 8 for filtration. After the filtration is completed, it enters the first-stage electrodialysis device 9 for separation to produce ethylene glycol which enters the second storage bin 11. Long-term use causes the filter element 405 in the first security filter 4 and the second security filter 8 to be clogged, and the filter element 405 needs to be replaced. Then, the pulling rod 509 is pulled to drive the pulling column 506 and the limiting column 505 to be replaced. Pull it out, the pulling column 506 drives the movable plate 504 to squeeze the spring 503, and the spring 503 is squeezed through the movable plate 504 and the fixed plate 502. When the limiting column 505 moves out from the internal circular groove of the rotating rod 402, and then the rotating plate 508 rotates the internal limiting groove of the limiting plate 501 to limit the elastic force of the spring 503, the rotating block 403 drives the rotating rod 402 to rotate, and the rotating rod 402 drives the large gear 406 to rotate, and the rotating large gear 406 drives the rotating gear 407 to rotate, and the rotating gear 407 drives the threaded rod 404 to rotate, so that the threaded rod 404 moves out from the upper end threaded groove inside the first security filter 4, the top cover 401 is opened, and the filter element 405 is taken out and replaced.

[0039] In the technical solution of the present invention, Figure 1 and Figure 2 and Figure 3 and Figure 4 and Figure 5 and Figure 7 As shown, the upper surface end of the first security filter 4 is movably connected with a connecting plate 409, the lower surface end of the connecting plate 409 is fixedly connected with a top cover 401, the inner upper end of the top cover 401 is rotatably connected with a rotating rod 402, the left surface end of the rotating rod 402 is fixedly connected with a rotating block 403, the lower surface end of the rotating rod 402 is fixedly connected with a large gear 406, the left surface end of the large gear 406 is meshingly connected with a rotating gear 407, the inner upper end of the rotating gear 407 is rotatably connected with a sliding wheel 4010, the upper surface end of the sliding wheel 4010 is fixedly connected with a connecting column 408, the inner lower end of the rotating gear 407 is threadedly connected with a threaded rod 404, and the inner lower end of the first security filter 4 is fixedly connected with a filter element 405, which can be quickly removed and replaced through the filter element 405.

[0040] In the technical solution of the present invention, Figure 2 and Figure 6As shown, the right end of the surface side of the limiting device 5 is fixedly connected to the limiting plate 501, the inner lower end of the limiting device 5 is fixedly connected to the fixing plate 502, the left end of the surface side of the fixing plate 502 is fixedly connected to the spring 503, the left end of the surface side of the spring 503 is fixedly connected to the moving plate 504, the inner lower end of the moving plate 504 is slidably connected to the pulling column 506, the left end of the surface side of the pulling column 506 is fixedly connected to the limiting column 505, the right end of the surface side of the pulling column 506 is fixedly connected to the rotating disk 507, the right end of the surface side of the rotating disk 507 is fixedly connected to the rotating plate 508, and the inner lower end of the rotating plate 508 is fixedly connected to the pulling rod 509, which limits the rotating rod 402 to avoid the first safety filter 4 and the second safety filter 8 from being unreliable during use.

[0041] In the technical solution of the present invention, Figure 7 As shown, a connecting plate 409 is fixedly connected to the upper end of the surface of the connecting column 408 to fix the connecting column 408 and ensure that the rotating gear 407 rotates.

[0042] In the technical solution of the present invention, Figure 6 As shown, the inner lower end of the fixing plate 502 is slidably connected with a pulling column 506 to ensure that the spring 503 is squeezed.

[0043] In the technical solution of the present invention, Figure 3 and Figure 4 As shown, a rotating groove is provided at the inner upper end of the rotating gear 407, and a thread groove is provided at the inner middle end of the rotating gear 407, so as to enhance the usability of the parts.

[0044] In the technical solution of the present invention, Figure 6 As shown, there are two groups of limit plates 501, and the two groups of limit plates 501 surround each other with the distribution center of the limit device 5, thereby enhancing the overall practicality and avoiding shaking during the limit process.

[0045] In the technical solution of the present invention, Figure 6 As shown, a limiting groove is provided at the inner upper end of the limiting plate 501 to limit the elastic force of the spring 503 .

[0046] In the technical solution of the present invention, Figure 3 As shown, a plurality of circular grooves are formed at the inner lower end of the rotating rod 402 to strengthen the connection between the top cover 401 and the first safety filter 4 .

[0047] The embodiment of the present application provides a high-efficiency and environmentally friendly ethylene glycol recovery method S1: pouring ethylene glycol waste liquid into the collecting bin 1, and then driving the first booster pump 3 to press the ethylene glycol waste liquid in the collecting bin 1 into the first security filter 4 for filtration. After the filtration is completed, it enters the second-stage electrodialysis device 12 for separation to produce ethylene glycol initial liquid, which enters the first storage bin 6. Then driving the second booster pump 7 to press the ethylene glycol initial liquid in the first storage bin 6 into the second security filter 8 for filtration. After the filtration is completed, it enters the first-stage electrodialysis device 9 for separation to produce ethylene glycol which enters the second storage bin 11 to recover the ethylene glycol waste liquid.

[0048] The embodiment of the present application provides a high-efficiency and environmentally friendly ethylene glycol recovery method S2: Long-term use causes the filter element 405 inside the first security filter 4 and the second security filter 8 to be blocked, and the filter element 405 needs to be replaced, then the pulling rod 509 is pulled to drive the pulling column 506 and the limiting column 505 to be pulled out, and the pulling column 506 drives the moving plate 504 to squeeze the spring 503, and the spring 503 is squeezed by the moving plate 504 and the fixed plate 502. When the limiting column 505 moves out from the internal circular groove of the rotating rod 402, the rotating plate 508 then rotates the limiting column 501 inside the limiting plate Inside the groove, the elastic force of the spring 503 is limited, and the rotating block 403 drives the rotating rod 402 to rotate, and the rotating rod 402 drives the large gear 406 to rotate, and the large gear 406 drives the rotating gear 407 to rotate, and the rotating gear 407 drives the threaded rod 404 to rotate, so that the threaded rod 404 moves out from the upper threaded groove inside the first security filter 4, and the top cover 401 is opened, and the filter element 405 is taken out and replaced, and the top covers 401 of the first security filter 4 and the second security filter 8 are quickly disassembled, so that the user can quickly remove the filter element 405.

[0049] When in use, pour the ethylene glycol waste liquid into the collecting bin 1, then drive the first booster pump 3 to force the ethylene glycol waste liquid in the collecting bin 1 into the first security filter 4 for filtration, after filtration, enter the second-stage electrodialysis device 12 for separation to produce ethylene glycol initial liquid which enters the first storage bin 6, then drive the second booster pump 7 to force the ethylene glycol initial liquid in the first storage bin 6 into the second security filter 8 for filtration, after filtration, enter the first-stage electrodialysis device 9 for separation to produce ethylene glycol which enters the second storage bin 11, long-term use causes the filter element 405 in the first security filter 4 and the second security filter 8 to be clogged, and the filter element 405 needs to be replaced, then pull the pull rod 509 to drive the pull column 506 and the limit column 505 to pull out , the pulling column 506 drives the moving plate 504 to squeeze the spring 503, and the spring 503 is squeezed by the moving plate 504 and the fixed plate 502. When the limiting column 505 moves out from the internal circular groove of the rotating rod 402, and then the rotating plate 508 rotates the internal limiting groove of the limiting plate 501 to limit the elastic force of the spring 503, the rotating block 403 drives the rotating rod 402 to rotate, and the rotating rod 402 drives the large gear 406 to rotate, and the rotating large gear 406 drives the rotating gear 407 to rotate, and the rotating gear 407 drives the threaded rod 404 to rotate, so that the threaded rod 404 moves out from the upper end threaded groove inside the first security filter 4, the top cover 401 is opened, and the filter element 405 is taken out and replaced.

Claims

1. A high-efficiency and environmentally friendly ethylene glycol recovery equipment, characterized by: The invention comprises a collecting bin (1), wherein the right end of the surface side of the collecting bin (1) is fixedly connected to a first connecting pipe (2), the right end of the surface side of the first connecting pipe (2) is fixedly connected to a first booster pump (3), the right end of the surface side of the first connecting pipe (2) is fixedly connected to a first safety filter (4), the right end of the surface side of the first connecting pipe (2) is fixedly connected to a second-stage electrodialysis device (12), the right end of the surface side of the first connecting pipe (2) is fixedly connected to a first storage bin (6), and the surface of the first storage bin (6) is fixedly connected to the first storage bin (6). A second connecting pipe (10) is fixedly connected to the right end of the surface side of the second connecting pipe (10), a second boosting pump (7) is fixedly connected to the right end of the surface side of the second connecting pipe (10), a second safety filter (8) is fixedly connected to the right end of the surface side of the second connecting pipe (10), a second storage bin (11) is fixedly connected to the right end of the surface side of the second connecting pipe (10), a first-stage electrodialysis device (9) is fixedly connected to the right end of the surface side of the second connecting pipe (10), and a limiting device (5) is provided on the upper surface of the first safety filter (4).

2. The high-efficiency and environmentally friendly ethylene glycol recovery equipment according to claim 1 is characterized in that: The upper surface of the first security filter (4) is movably connected to a connection plate (409), the lower surface of the connection plate (409) is fixedly connected to a top cover (401), the upper internal end of the top cover (401) is rotatably connected to a rotating rod (402), the left surface end of the rotating rod (402) is fixedly connected to a rotating block (403), the lower surface end of the rotating rod (402) is fixedly connected to a large gear (406), the left surface end of the large gear (406) is meshingly connected to a rotating gear (407), the upper internal end of the rotating gear (407) is rotatably connected to a sliding wheel (4010), the upper surface of the sliding wheel (4010) is fixedly connected to a connecting column (408), the lower internal end of the rotating gear (407) is threadedly connected to a threaded rod (404), and the lower internal end of the first security filter (4) is fixedly connected to a filter element (405).

3. The high-efficiency and environmentally friendly ethylene glycol recovery equipment according to claim 1 is characterized in that: The right end of the surface side of the limiting device (5) is fixedly connected to a limiting plate (501), the inner lower end of the limiting device (5) is fixedly connected to a fixing plate (502), the left end of the surface side of the fixing plate (502) is fixedly connected to a spring (503), the left end of the surface side of the spring (503) is fixedly connected to a moving plate (504), the inner lower end of the moving plate (504) is slidably connected to a pulling column (506), the left end of the surface side of the pulling column (506) is fixedly connected to a limiting column (505), the right end of the surface side of the pulling column (506) is fixedly connected to a rotating disk (507), the right end of the surface side of the rotating disk (507) is fixedly connected to a rotating plate (508), and the inner lower end of the rotating plate (508) is fixedly connected to a pulling rod (509).

4. The high-efficiency and environmentally friendly ethylene glycol recovery equipment according to claim 2 is characterized in that: A connection plate (409) is fixedly connected to the upper end of the surface of the connection column (408).

5. The high-efficiency and environmentally friendly ethylene glycol recovery equipment according to claim 3 is characterized in that: The inner lower end of the fixing plate (502) is slidably connected with a pulling column (506).

6. The high-efficiency and environmentally friendly ethylene glycol recovery equipment according to claim 2 is characterized in that: A rotating groove is formed at the inner upper end of the rotating gear (407), and a thread groove is formed at the inner middle end of the rotating gear (407).

7. A high-efficiency and environmentally friendly ethylene glycol recovery device according to claim 3, characterized in that: There are two groups of the limiting plates (501), and the two groups of limiting plates (501) surround each other with the limiting device (5) being distributed at the center.

8. The high-efficiency and environmentally friendly ethylene glycol recovery equipment according to claim 3 is characterized in that: A limiting groove is provided at the inner upper end of the limiting plate (501).

9. The high-efficiency and environmentally friendly ethylene glycol recovery equipment according to claim 2 is characterized in that: The inner lower end of the rotating rod (402) is provided with a plurality of circular grooves.

10. A high-efficiency and environmentally friendly ethylene glycol recovery method according to any one of claims 1 to 9, characterized in that: The steps include: S1: Pour the ethylene glycol waste liquid into the collecting bin (1), then drive the first booster pump (3) to push the ethylene glycol waste liquid in the collecting bin (1) into the first security filter (4) for filtration. After filtration, the waste liquid enters the second-stage electrodialysis device (12) for separation to produce ethylene glycol initial liquid, which enters the first storage bin (6). Then drive the second booster pump (7) to push the ethylene glycol initial liquid in the first storage bin (6) into the second security filter (8) for filtration. After filtration, the waste liquid enters the first-stage electrodialysis device (9) for separation to produce ethylene glycol, which enters the second storage bin (11). S2: Long-term use causes the filter core (405) inside the first safety filter (4) and the second safety filter (8) to be clogged, and the filter core (405) needs to be replaced. Then, the pulling rod (509) is pulled to drive the pulling column (506) and the limiting column (505) to be pulled out, and the pulling column (506) drives the moving plate (504) to squeeze the spring (503). The spring (503) is squeezed by the moving plate (504) and the fixed plate (502). When the limiting column (505) moves out from the internal circular groove of the rotating rod (402), the rotating plate (508) is rotated. The elastic force of the spring (503) is limited inside the limiting groove inside the movable limiting plate (501), and the rotating block (403) is rotated to drive the rotating rod (402) to rotate, and the rotating rod (402) is rotated to drive the large gear (406) to rotate, and the large gear (406) is rotated to drive the rotating gear (407) to rotate, and the rotating gear (407) drives the threaded rod (404) to rotate, so that the threaded rod (404) moves out from the upper threaded groove inside the first safety filter (4), the top cover (401) is opened, and the filter element (405) is taken out and replaced.

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