Equipment for recovering ethylene glycol from ethylene glycol production wastewater

Abstract

The invention relates to the technical field of ethylene glycol recovery tanks, and discloses a device for recovering ethylene glycol from ethylene glycol production wastewater, the device comprises a water bath kettle, the outer wall of the water bath kettle is fixedly connected with a support shell, the periphery of the top end of the inner wall of the support shell is fixedly connected with four fixing strips, and the top of the support shell is fixedly connected with a top plate; the top of the fixing strip is fixedly connected with a distillation shell, the bottom end of the distillation shell is arranged in the water bath kettle, the water bath kettle is started, water in the water bath kettle is heated, heat energy is transmitted to the bottom end of the distillation shell, ethylene glycol wastewater in the distillation shell is heated, and therefore ethylene glycol in the ethylene glycol wastewater is distilled and recycled. Meanwhile, a motor is started and drives a rotating shaft to rotate, the rotating shaft drives a stirring paddle to rotate, and the stirring paddle stirs the ethylene glycol wastewater in the distillation shell in the rotating process, so that the ethylene glycol wastewater can be uniformly heated by heat, and the distillation efficiency of the ethylene glycol wastewater is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ethylene glycol recovery tanks, in particular to equipment for recovering ethylene glycol from ethylene glycol production wastewater. Background Art

[0002] Ethylene glycol is also known as glycol, 1,2-ethylene glycol, or EG for short. Due to its high boiling point, ethylene glycol is generally prepared by vacuum distillation, and can be distilled at about 80°C. In particular, the distillation process of waste ethylene glycol is generally carried out in a distillation tank, and ethylene glycol is a colorless, odorless, sweet liquid with a certain degree of toxicity and high risk.

[0003] In the prior art, in the process of recycling ethylene glycol production wastewater, a distillation device is usually used to heat the wastewater and recover the evaporated ethylene glycol wastewater. However, in this process, the heating area of ​​ethylene glycol needs to be sealed to prevent a large amount of steam from leaking out, which affects the collection efficiency of ethylene glycol. Summary of the invention

[0004] The object of the present invention is to provide a device for recovering ethylene glycol from ethylene glycol production wastewater to solve the problems raised in the above background technology.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention discloses a device for recovering ethylene glycol from ethylene glycol production wastewater, comprising a water bath, wherein the outer wall of the water bath is fixedly connected with a support shell, four fixing bars are fixedly connected around the top of the inner wall of the support shell, the top of the support shell is fixedly connected with a top plate, the top of the fixing bars is fixedly connected with a distillation shell, the bottom end of the distillation shell is arranged inside the water bath, and further comprises a wastewater recovery mechanism, wherein the wastewater recovery mechanism comprises a motor fixedly connected to the top of the top plate, the top of the inner wall of the distillation shell is fixedly connected with a fixing plate, the output end of the motor is fixedly connected with a rotating shaft, one end of the rotating shaft passes through the fixing plate and extends to the inside of the distillation shell, the outer wall of one end of the rotating shaft is fixedly connected with a reciprocating screw sleeve, the reciprocating screw sleeve is arranged inside the distillation shell, and the outer wall of the reciprocating screw sleeve is provided with a stirring assembly.

[0006] Furthermore, the stirring assembly includes a threaded plate threadedly connected to the outer wall of the bottom end of the reciprocating screw sleeve, a stirring paddle is fixedly connected to the outer wall of the bottom end of the rotating shaft, four first vertical tubes are fixedly connected to the bottom of the inner wall of the distillation shell, and a plurality of air holes are respectively opened around the outer wall of the first vertical tubes.

[0007] Furthermore, four second vertical pipes are connected around the bottom of the threaded plate, the first vertical pipe is arranged inside the second vertical pipe, the top end of the second vertical pipe passes through the fixed plate and extends to the outside of the fixed plate, and the top of the second vertical pipe is connected to a drain pipe, one end of the drain pipe passes through the top plate and extends to the outside of the top plate.

[0008] Furthermore, a sealing assembly is provided at the top of the threaded plate, and the sealing assembly includes four square grooves opened around the top of the threaded plate, a spring is fixedly connected to one side of the inner wall of the square groove, a slider is fixedly connected to one end of the spring, and the outer wall of the slider is slidably connected to the inside of the square groove.

[0009] Furthermore, the top of the slider is rotatably connected to a rotating rod, one end of the rotating rod away from the slider is rotatably connected to a lifting block, and one side of the lifting block is slidably connected to the inner wall of the distillation shell.

[0010] Furthermore, the slider is fixedly connected to a vertical plate near the top of the rotating rod, a bevel block is fixedly connected to one side of the vertical plate, a first sealing bag is fixedly connected to the top center of the threaded plate, and a second sealing bag is fixedly connected to the bottom center of the threaded plate.

[0011] Furthermore, an auxiliary component is provided at the top of the threaded plate, and the auxiliary component includes four sliding rods that penetrate and are slidably connected around the top of the threaded plate, the bottom of the sliding rod is fixedly connected to a special-shaped plate, the top of the special-shaped plate is fixedly connected to a return spring, the top of the return spring is fixedly connected to the bottom of the threaded plate, and the top of the special-shaped plate contacts the bottom of the second sealing bag.

[0012] Furthermore, a protective assembly is provided on the top of the special-shaped plate, and the protective assembly includes a concave shell fixedly connected to the side of the special-shaped plate close to the top of the return spring, and elastic rods are rotatably connected to the two ends of one side of the inner wall of the concave shell, and an arc block is rotatably connected to the end of the elastic rod away from the concave shell.

[0013] Furthermore, a circular groove is provided at the bottom of the threaded plate, the top outer wall of the arc block is slidably connected to the inner wall of the circular groove, a scraping rod is fixedly connected to one side of the arc block, and the top contact of the scraping rod is arranged at the bottom of the threaded plate.

[0014] The present invention has the following beneficial effects: (1) The present invention starts a water bath to heat the water inside the water bath, and the heat energy is transferred to the bottom of the distillation shell to heat the ethylene glycol wastewater inside the distillation shell, thereby distilling and recovering the ethylene glycol in the ethylene glycol wastewater. At the same time, the motor is started, and the motor drives the rotating shaft to rotate, and the rotating shaft drives the stirring paddle to rotate. During the rotation of the stirring paddle, the ethylene glycol wastewater inside the distillation shell is stirred, so that the heat can evenly heat the ethylene glycol wastewater, thereby improving the distillation efficiency of the ethylene glycol wastewater. The rotating shaft drives the reciprocating screw sleeve to rotate. During the rotation of the reciprocating screw sleeve, it is limited by the first vertical pipe, and the reciprocating screw sleeve drives the threaded plate to vertically descend. When the threaded plate descends, the reciprocating screw sleeve is rotated. When it drops to the bottom of the distillation shell, the heated area becomes smaller and the heat is concentrated, which improves the distillation efficiency of ethylene glycol wastewater. Due to the air holes opened at the first vertical pipe, the purified ethylene glycol enters the interior of the first vertical pipe through the air holes, and then enters the interior of the second vertical pipe through the first vertical pipe. Ethylene glycol enters the interior of the drain pipe through the second vertical pipe, and then the discharged ethylene glycol is collected outside. When the threaded plate moves up, the threaded plate drives the second vertical pipe to move up. During the upward movement of the second vertical pipe, the air holes opened at the first vertical pipe are no longer blocked, so that the purified ethylene glycol enters the interior of the first vertical pipe through multiple air holes, thereby improving the discharge efficiency of ethylene glycol.

[0015] (2) According to the present invention, when the threaded plate moves up, the threaded plate drives the slider to move up, the slider drives the rotating rod to move up, the rotating rod drives the lifting block to move up, and the lifting block will come into contact with the bottom of the fixed plate during the upward movement, and the lifting block will drive the rotating rod to move down due to the reaction force of the fixed plate. Due to the setting of the square groove, the rotating rod drives the slider to slide along the outer wall of the square groove, the slider drives the vertical plate to move, the vertical plate drives the inclined block to move, and the inclined block will come into contact with the first sealing bag during the movement, so that the first sealing bag is squeezed, and the first sealing bag can be blocked at the connection between the reciprocating screw rod sleeve and the threaded plate during the deformation process, thereby improving the blocking effect of the heating area at the bottom end of the distillation shell, improving the heating effect, and indirectly improving the purification efficiency of ethylene glycol.

[0016] (3) In the present invention, when the threaded plate descends, the inclined block no longer squeezes the first sealing bag. At this time, the return spring is elastically deformed and drives the special-shaped plate to move upward. During the upward movement of the special-shaped plate, it will come into contact with the second sealing bag, causing the second sealing bag to be squeezed. During the deformation of the second sealing bag, the connection between the reciprocating screw sleeve and the threaded plate is sealed again to prevent the first sealing bag from failing to seal the connection between the reciprocating screw sleeve and the threaded plate. The gas passes through the gap between the reciprocating screw sleeve and the threaded plate and enters between the threaded plate and the fixed plate, thereby preventing ethylene glycol from corroding the fixed plate and improving the protection effect of the device.

[0017] (4) According to the present invention, when the inclined block squeezes the first sealing bag, the inclined block first contacts the sliding rod, and the squeezing force generated causes the sliding rod to drop vertically, and the sliding rod drives the special-shaped plate to drop, and the special-shaped plate drives the two concave shells to drop, and the concave shell drives the elastic rod to drop. Due to the setting of the annular groove, the elastic rod drives the arc block to slide along the outer wall of the annular groove, and the arc block drives the scraping rod to move. During the movement of the scraping rod, the bottom of the threaded plate is scraped to prevent the distilled ethylene glycol from adhering to the bottom of the threaded plate and corroding the threaded plate, thereby improving the protection effect of the device.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall side structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the distillation shell of the present invention; Figure 4 It is a schematic diagram of the top view structure of the threaded plate of the present invention; Figure 5 This is a bottom view of the structure of the threaded plate of the present invention; Figure 6 It is a schematic diagram of the side structure of the sliding rod of the present invention; Figure 7 For the present invention Figure 3 A magnified view of middle; Figure 8 For the present invention Figure 3 Enlarged view of B.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows: In the figure: 1, water bath; 2, bracket shell; 3, fixing bar; 4, top plate; 5, distillation shell; 6, wastewater recovery mechanism; 61, motor; 62, fixing plate; 63, rotating shaft; 64, reciprocating screw rod sleeve; 65, stirring assembly; 66, sealing assembly; 67, auxiliary assembly; 68, protection assembly; 651, threaded plate; 652, stirring paddle; 653, first vertical pipe; 654, air hole; 655, second vertical pipe; 656, drain pipe; 661, square groove; 662, spring; 663, slider; 664, rotating rod; 665, lifting block; 666, vertical plate; 667, inclined block; 668, first sealing bag; 669, second sealing bag; 671, sliding rod; 672, special-shaped plate; 673, return spring; 681, concave shell; 682, elastic rod; 683, arc block; 684, circular groove; 685, scraping rod. DETAILED DESCRIPTION

[0022] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0023] Example 1, please refer to Figure 1 - Figure 8 As shown, the present invention is a device for recovering ethylene glycol from ethylene glycol production wastewater, comprising a water bath 1, the outer wall of the water bath 1 is fixedly connected to a support shell 2, four fixing bars 3 are fixedly connected to the top of the inner wall of the support shell 2, a top plate 4 is fixedly connected to the top of the support shell 2, a distillation shell 5 is fixedly connected to the top of the fixing bar 3, the water bath 1 is turned on to heat the water inside the distillation shell 5, and the heat energy is transferred to the bottom end of the distillation shell 5 to heat the ethylene glycol wastewater inside the distillation shell 5, thereby distilling and recovering the ethylene glycol in the ethylene glycol wastewater, the bottom end of the distillation shell 5 is arranged inside the water bath 1, and also includes; The wastewater recovery mechanism 6 includes a motor 61 fixedly connected to the top of the top plate 4, a fixed plate 62 is fixedly connected to the top of the inner wall of the distillation shell 5, an output end of the motor 61 is fixedly connected to a rotating shaft 63, one end of the rotating shaft 63 passes through the fixed plate 62 and extends to the inside of the distillation shell 5, one end of the rotating shaft 63 is fixedly connected to the outer wall of the reciprocating screw rod sleeve 64, the reciprocating screw rod sleeve 64 is arranged inside the distillation shell 5, and a stirring assembly 65 is arranged on the outer wall of the reciprocating screw rod sleeve 64.

[0024] The stirring assembly 65 includes a threaded plate 651 threadedly connected to the outer wall of the bottom end of the reciprocating screw sleeve 64, and a stirring paddle 652 is fixedly connected to the outer wall of the bottom end of the rotating shaft 63. The motor 61 is started, and the motor 61 drives the rotating shaft 63 to rotate, and the rotating shaft 63 drives the stirring paddle 652 to rotate. During the rotation of the stirring paddle 652, the ethylene glycol wastewater inside the distillation shell 5 is stirred, so that the heat can evenly heat the ethylene glycol wastewater, thereby improving the distillation efficiency of the ethylene glycol wastewater, and the inner wall of the distillation shell 5 Four first vertical tubes 653 are fixedly connected around the bottom, and the rotating shaft 63 drives the reciprocating screw sleeve 64 to rotate. During the rotation of the reciprocating screw sleeve 64, it is limited by the first vertical tube 653, and the reciprocating screw sleeve 64 drives the threaded plate 651 to vertically descend. When the threaded plate 651 descends to the bottom end of the distillation shell 5, the heating area becomes smaller, and the heat is concentrated, which improves the distillation efficiency of ethylene glycol wastewater. A number of air holes 654 are respectively opened around the outer wall of the first vertical tube 653.

[0025] The bottom of the threaded plate 651 is connected to four second vertical pipes 655, the first vertical pipe 653 is arranged inside the second vertical pipe 655, the top of the second vertical pipe 655 penetrates the fixed plate 62 and extends to the outside of the fixed plate 62, the top of the second vertical pipe 655 is connected to a drain pipe 656, one end of the drain pipe 656 penetrates the top plate 4 and extends to the outside of the top plate 4, and is provided with an air hole 654 opened at the first vertical pipe 653. The purified ethylene glycol enters the interior of the first vertical pipe 653 through the air hole 654, and the ethylene glycol passes through the second vertical pipe 655. The ethylene glycol enters the interior of the second vertical pipe 655 through the first vertical pipe 653, and then enters the interior of the drain pipe 656 through the second vertical pipe 655. The discharged ethylene glycol is then collected outside. When the threaded plate 651 moves upward, the threaded plate 651 drives the second vertical pipe 655 to move upward. During the upward movement of the second vertical pipe 655, the air holes 654 opened in the first vertical pipe 653 are no longer blocked, so that the purified ethylene glycol enters the interior of the first vertical pipe 653 through multiple air holes 654, thereby improving the discharge efficiency of ethylene glycol.

[0026] A sealing assembly 66 is provided at the top of the threaded plate 651. The sealing assembly 66 includes four square grooves 661 opened around the top of the threaded plate 651. A spring 662 is fixedly connected to one side of the inner wall of the square groove 661. A slider 663 is fixedly connected to one end of the spring 662. The outer wall of the slider 663 is slidably connected to the inside of the square groove 661.

[0027] The top of the slider 663 is rotatably connected to a rotating rod 664 , and one end of the rotating rod 664 away from the slider 663 is rotatably connected to a lifting block 665 , and one side of the lifting block 665 is slidably connected to the inner wall of the distillation shell 5 .

[0028] The top of the slider 663 near the rotating rod 664 is fixedly connected with a vertical plate 666, one side of the vertical plate 666 is fixedly connected with an inclined block 667, and the top center of the threaded plate 651 is fixedly connected with a first sealing bag 668. When the threaded plate 651 moves upward, the threaded plate 651 drives the slider 663 to move upward, the slider 663 drives the rotating rod 664 to move upward, and the rotating rod 664 drives the lifting block 665 to move upward. During the upward movement of the lifting block 665, it will contact the bottom of the fixed plate 62, and the reaction force of the fixed plate 62 will cause the lifting block 665 to drive the rotating rod 664 to move downward. Affected by the setting of the square groove 661, the rotating rod 664 is rotated. The movable rod 664 drives the slider 663 to slide along the outer wall of the square groove 661, and the slider 663 drives the vertical plate 666 to move, and the vertical plate 666 drives the inclined block 667 to move. During the movement of the inclined block 667, it will come into contact with the first sealing bag 668, so that the first sealing bag 668 is squeezed. During the deformation of the first sealing bag 668, the connection between the reciprocating screw sleeve 64 and the threaded plate 651 can be sealed, thereby improving the sealing effect of the heating area at the bottom end of the distillation shell 5, improving the heating effect, and laterally improving the purification efficiency of ethylene glycol. A second sealing bag 669 is fixedly connected to the bottom center of the threaded plate 651.

[0029] In embodiment 2, an auxiliary component 67 is provided at the top of the threaded plate 651. The auxiliary component 67 includes four sliding rods 671 that penetrate and are slidably connected to the top of the threaded plate 651. The top of the sliding rod 671 is spherical. When pushed by the inclined block 667, the contact end of the inclined block 667 and the sliding rod 671 can slide to prevent jamming. The vertical descending height of the sliding rod 671 is set by the inclination arc of the inclined block 667. The bottom of the sliding rod 671 is fixedly connected to a special-shaped plate 672, and the top of the special-shaped plate 672 is fixedly connected to a return spring 673. When the threaded plate 651 descends, the inclined block 667 no longer squeezes the first sealing bag 668. At this time, the return spring 673 is elastically deformed, and the return spring 673 is provided. When the movable special-shaped plate 672 moves upward, the special-shaped plate 672 will contact the second sealing bag 669 during the upward movement, so that the second sealing bag 669 is squeezed. During the deformation of the second sealing bag 669, the connection between the reciprocating screw rod sleeve 64 and the threaded plate 651 is sealed again to prevent the first sealing bag 668 from failing to seal the connection between the reciprocating screw rod sleeve 64 and the threaded plate 651. The gas passes through the gap between the reciprocating screw rod sleeve 64 and the threaded plate 651 and enters between the threaded plate 651 and the fixed plate 62, preventing ethylene glycol from corroding the fixed plate 62, thereby improving the protection effect of the device. The top of the return spring 673 is fixedly connected to the bottom of the threaded plate 651, and the top of the special-shaped plate 672 contacts the bottom of the second sealing bag 669.

[0030] A protective assembly 68 is provided on the top of the special-shaped plate 672, and the protective assembly 68 includes a concave shell 681 fixedly connected to the side of the top of the special-shaped plate 672 close to the return spring 673, and the two ends of one side of the inner wall of the concave shell 681 are rotatably connected with elastic rods 682 respectively. The material of the elastic rod 682 is flexible and can be slightly bent and deformed. When the elastic rod 682 drives the arc block 683 to slide, it can prevent the arc block 683 from getting stuck. The end of the elastic rod 682 away from the concave shell 681 is rotatably connected with the arc block 683.

[0031] The bottom of the threaded plate 651 is provided with an annular groove 684, the top outer wall of the arc block 683 is slidably connected to the inner wall of the annular groove 684, and a scraper rod 685 is fixedly connected to one side of the arc block 683. The top contact of the scraper rod 685 is set at the bottom of the threaded plate 651. When the inclined block 667 squeezes the first sealing bag 668, the inclined block 667 will first contact the sliding rod 671, and the squeezing force generated will make the sliding rod 671 drop vertically, and the sliding rod 671 drives the special-shaped plate 672 to drop, and the special-shaped plate 672 is moved downward. The plate 672 drives the two concave shells 681 to descend, and the concave shells 681 drive the elastic rod 682 to descend. Due to the setting of the annular groove 684, the elastic rod 682 drives the arc block 683 to slide along the outer wall of the annular groove 684, and the arc block 683 drives the scraper rod 685 to move. During the movement of the scraper rod 685, the bottom of the threaded plate 651 is scraped to prevent the distilled ethylene glycol from adhering to the bottom of the threaded plate 651 and corroding the threaded plate 651, thereby improving the protection effect of the device.

[0032] When in use, the water bath 1 is turned on to heat the water inside the distillation shell 5, and the heat energy is transferred to the bottom end of the distillation shell 5 to heat the ethylene glycol wastewater inside the distillation shell 5, thereby distilling and recovering the ethylene glycol in the ethylene glycol wastewater, and at the same time starting the motor 61, the motor 61 drives the rotating shaft 63 to rotate, the rotating shaft 63 drives the stirring paddle 652 to rotate, and the stirring paddle 652 stirs the ethylene glycol wastewater inside the distillation shell 5 during the rotation, so that the heat can evenly heat the ethylene glycol wastewater, thereby improving the distillation efficiency of the ethylene glycol wastewater, and the rotating shaft 63 drives the reciprocating screw sleeve 64 to rotate. During the rotation of the reciprocating screw sleeve 64, it is limited by the first vertical pipe 653, and the reciprocating screw sleeve 64 drives the threaded plate 651 to vertically descend. When the threaded plate 651 descends to the bottom end of the distillation shell 5 When the threaded plate 651 moves upward, the threaded plate 651 drives the second vertical pipe 655 to move upward. During the upward movement of the second vertical pipe 655, the pores 654 opened at the first vertical pipe 653 are no longer blocked, so that the purified ethylene glycol enters the first vertical pipe 653 through the pores 654, and then enters the second vertical pipe 655 through the first vertical pipe 653. The ethylene glycol enters the drain pipe 656 through the second vertical pipe 655, and then the discharged ethylene glycol is collected in the outside. When the threaded plate 651 moves upward, the threaded plate 651 drives the second vertical pipe 655 to move upward. During the upward movement of the second vertical pipe 655, the pores 654 opened at the first vertical pipe 653 are no longer blocked, so that the purified ethylene glycol enters the first vertical pipe 653 through multiple pores 654, thereby improving the discharge efficiency of ethylene glycol.

[0033] When the threaded plate 651 moves upward, the threaded plate 651 drives the slider 663 to move upward, the slider 663 drives the rotating rod 664 to move upward, and the rotating rod 664 drives the lifting block 665 to move upward. During the upward movement of the lifting block 665, it will contact the bottom of the fixed plate 62, and the reaction force of the fixed plate 62 will cause the lifting block 665 to drive the rotating rod 664 to move downward. Due to the setting of the square groove 661, the rotating rod 664 drives the slider 663 to slide along the outer wall of the square groove 661, the slider 663 drives the vertical plate 666 to move, and the vertical plate 666 drives the inclined block 667 to move. During the movement of the inclined block 667, it will contact the first sealing capsule 668, so that the first sealing capsule 668 is squeezed. During the deformation of the first sealing capsule 668, the connection between the reciprocating screw rod sleeve 64 and the threaded plate 651 can be blocked, thereby improving the blocking effect of the heating area at the bottom end of the distillation shell 5, improving the heating effect, and indirectly improving the purification efficiency of ethylene glycol.

[0034] When the threaded plate 651 descends, the inclined block 667 no longer squeezes the first sealing bag 668. At this time, due to the elastic deformation of the return spring 673, the return spring 673 drives the special-shaped plate 672 to move upward. During the upward movement of the special-shaped plate 672, it will contact the second sealing bag 669, so that the second sealing bag 669 is squeezed. During the deformation of the second sealing bag 669, the connection between the reciprocating screw rod sleeve 64 and the threaded plate 651 is sealed again to prevent the first sealing bag 668 from failing to seal the connection between the reciprocating screw rod sleeve 64 and the threaded plate 651. The gas passes through the gap between the reciprocating screw rod sleeve 64 and the threaded plate 651 and enters between the threaded plate 651 and the fixed plate 62, preventing ethylene glycol from corroding the fixed plate 62, thereby improving the protection effect of the device.

[0035] When the inclined block 667 squeezes the first sealing bag 668, the inclined block 667 will first come into contact with the sliding rod 671, and the generated squeezing force causes the sliding rod 671 to drop vertically, and the sliding rod 671 drives the special-shaped plate 672 to drop, and the special-shaped plate 672 drives the two concave shells 681 to drop, and the concave shell 681 drives the elastic rod 682 to drop. Affected by the setting of the annular groove 684, the elastic rod 682 drives the arc block 683 to slide along the outer wall of the annular groove 684, and the arc block 683 drives the scraping rod 685 to move. During the movement of the scraping rod 685, the bottom of the threaded plate 651 is scraped to prevent the distilled ethylene glycol from adhering to the bottom of the threaded plate 651 and corroding the threaded plate 651, thereby improving the protection effect of the device.

[0036] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An apparatus for recovering ethylene glycol from ethylene glycol production wastewater, comprising a water bath (1), characterized in that: The outer wall of the water bath (1) is fixedly connected to a support shell (2), the top of the inner wall of the support shell (2) is respectively fixedly connected to four fixing strips (3), the top of the support shell (2) is fixedly connected to a top plate (4), the top of the fixing strip (3) is fixedly connected to a distillation shell (5), and the bottom end of the distillation shell (5) is arranged inside the water bath (1), and further comprises: A wastewater recovery mechanism (6), the wastewater recovery mechanism (6) comprising a motor (61) fixedly connected to the top of a top plate (4), a fixing plate (62) fixedly connected to the top of an inner wall of the distillation shell (5), an output end of the motor (61) fixedly connected to a rotating shaft (63), one end of the rotating shaft (63) passing through the fixing plate (62) and extending to the interior of the distillation shell (5), one end of the rotating shaft (63) fixedly connected to the outer wall of a reciprocating screw rod sleeve (64), the reciprocating screw rod sleeve (64) being arranged inside the distillation shell (5), and a stirring assembly (65) being arranged on the outer wall of the reciprocating screw rod sleeve (64).

2. The device for recovering ethylene glycol from ethylene glycol production wastewater according to claim 1, characterized in that: The stirring assembly (65) comprises a threaded plate (651) threadedly connected to the outer wall of the bottom end of the reciprocating screw rod sleeve (64); the outer wall of the bottom end of the rotating shaft (63) is fixedly connected to a stirring paddle (652); four first vertical tubes (653) are fixedly connected to the bottom of the inner wall of the distillation shell (5) around each other; and a plurality of air holes (654) are respectively opened around the outer wall of the first vertical tube (653).

3. The device for recovering ethylene glycol from ethylene glycol production wastewater according to claim 2, characterized in that: The bottom of the threaded plate (651) is connected to four second vertical pipes (655) on all sides, the first vertical pipe (653) is arranged inside the second vertical pipe (655), the top end of the second vertical pipe (655) passes through the fixed plate (62) and extends to the outside of the fixed plate (62), and the top of the second vertical pipe (655) is connected to a drainage pipe (656), one end of which passes through the top plate (4) and extends to the outside of the top plate (4).

4. The device for recovering ethylene glycol from ethylene glycol production wastewater according to claim 3, characterized in that: A sealing assembly (66) is provided at the top of the threaded plate (651), and the sealing assembly (66) comprises four square grooves (661) opened around the top of the threaded plate (651), a spring (662) is fixedly connected to one side of the inner wall of the square groove (661), a slider (663) is fixedly connected to one end of the spring (662), and the outer wall of the slider (663) is slidably connected to the inside of the square groove (661).

5. The device for recovering ethylene glycol from ethylene glycol production wastewater according to claim 4, characterized in that: The top of the slider (663) is rotatably connected to a rotating rod (664), and one end of the rotating rod (664) away from the slider (663) is rotatably connected to a lifting block (665), and one side of the lifting block (665) is slidably connected to the inner wall of the distillation shell (5).

6. The device for recovering ethylene glycol from ethylene glycol production wastewater according to claim 5, characterized in that: The top of the sliding block (663) close to the rotating rod (664) is fixedly connected to a vertical plate (666), one side of the vertical plate (666) is fixedly connected to an inclined block (667), the top center of the threaded plate (651) is fixedly connected to a first sealing bag (668), and the bottom center of the threaded plate (651) is fixedly connected to a second sealing bag (669).

7. The device for recovering ethylene glycol from ethylene glycol production wastewater according to claim 6, characterized in that: An auxiliary component (67) is provided at the top of the threaded plate (651), and the auxiliary component (67) includes four sliding rods (671) that penetrate through and are slidably connected to the top of the threaded plate (651) on all sides, and the bottom of the sliding rods (671) is fixedly connected to a special-shaped plate (672), and the top of the special-shaped plate (672) is fixedly connected to a return spring (673), and the top of the return spring (673) is fixedly connected to the bottom of the threaded plate (651), and the top of the special-shaped plate (672) contacts the bottom of the second sealing bag (669).

8. The device for recovering ethylene glycol from ethylene glycol production wastewater according to claim 7, characterized in that: A protective component (68) is provided on the top of the special-shaped plate (672), and the protective component (68) comprises a concave shell (681) fixedly connected to one side of the top of the special-shaped plate (672) close to the return spring (673), and elastic rods (682) are rotatably connected to both ends of one side of the inner wall of the concave shell (681), and an arc block (683) is rotatably connected to one end of the elastic rod (682) away from the concave shell (681).

9. The device for recovering ethylene glycol from ethylene glycol production wastewater according to claim 8, characterized in that: A circular groove (684) is formed at the bottom of the threaded plate (651); the outer wall of the top end of the arc block (683) is slidably connected to the inner wall of the circular groove (684); a scraping rod (685) is fixedly connected to one side of the arc block (683); the top of the scraping rod (685) is contacted with the bottom of the threaded plate (651).

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