Rectification equipment for preparing isooctyl thioglycolate

Abstract

Rectification equipment for preparing isooctyl thioglycolate belongs to the technical field of rectification equipment and comprises a rectification tower, an upper filler plate and a lower filler plate are fixedly connected in the rectification tower, a plurality of guide rods are fixedly connected between the upper filler plate and the lower filler plate jointly, and two pre-tightening plate mechanisms are slidably connected to the guide rods jointly. A multi-direction piston mechanism is arranged between the two pre-tightening plate mechanisms, a plurality of movable ends are arranged at the positions, corresponding to the guide rods, of the multi-direction piston mechanism, the movable end of each multi-direction piston mechanism is rotationally connected with two connecting rods, and one ends of the two connecting rods are rotationally connected with the two pre-tightening plate mechanisms respectively. The pre-tightening plate mechanism, the multi-directional piston mechanism and the connecting rod are arranged to compress the filler, a large cavity is eliminated when the filler collapses due to deformation of the filler, and the guide rod, the connecting ring, the first porous plate and the stirring rod are arranged to drive the whole filler to twist, so that the adhered filler is dislocated and separated.

Description

Technical Field

[0001] The present invention relates to the technical field of rectification equipment, and particularly to a rectification equipment for the preparation of isooctyl mercaptoacetate. Background Art

[0002] Isooctyl mercaptoacetate is an important sulfur-containing ester compound, with both reaction activity and functionality, and is widely used in fields such as polymer modification and pharmaceutical synthesis. The rectification of isooctyl mercaptoacetate is a common purification method for separating and purifying this ester compound, and the rectification process is carried out in a rectification column.

[0003] For example, the Chinese patent with the publication number CN214105870U: An efficient rectification column, including a frame body, a rectification column body, and a lifting device. The rectification column body is located on the frame body, and the lifting device is located inside the rectification column body. The lifting device includes two cleaning rings, two bidirectional screws, and a driving mechanism. The bidirectional screws penetrate through the cleaning rings, the cleaning rings are closely attached to the inner wall of the rectification column body, and the cleaning rings are parallel. The bidirectional screws are arranged along the height direction of the rectification column body. One end of the bidirectional screw is rotatably connected to the rectification column body, and the other end penetrates through the rectification column body and is connected to the driving mechanism. Through the lifting device in the above patent, the cleaning rings reciprocate along the inner wall of the rectification column body, continuously cleaning the inner wall of the rectification column body, reducing labor input, and improving reaction efficiency.

[0004] However, the current rectification equipment still has some deficiencies when rectifying isooctyl mercaptoacetate. For example, there is packing installed between two packing nets in the rectification column. The liquid flows from top to bottom, and the steam flows from bottom to top, and heat and mass transfer occur in the packing layer. During long-term use, the deformation of the packing will cause the packing to collapse, thereby changing the stacking state, resulting in relatively large cavities in some areas of the packing layer, leading to gas-phase short-circuit and loss of mass transfer area.

[0005] In view of the above problems, a rectification equipment for the preparation of isooctyl mercaptoacetate is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a rectification equipment for the preparation of isooctyl mercaptoacetate. By using this device for operation, the problems in the above background that the packing deforms and collapses after long-term use, thereby changing the stacking state, and relatively large cavities are generated in some areas of the packing layer, leading to gas-phase short-circuit, are solved.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a distillation device for preparing isooctyl thioglycolate, comprising a distillation tower, an upper filling plate and a lower filling plate are fixedly connected inside the distillation tower, a plurality of guide rods are fixedly connected between the upper filling plate and the lower filling plate, each of the guide rods is fixedly connected to a support block, two pre-tightening plate mechanisms are slidably connected to the plurality of guide rods, the two pre-tightening plate mechanisms are mirror-imaged at the two ends of the plurality of support blocks, the two pre-tightening plate mechanisms are elastically connected to the plurality of support blocks by springs, a multi-directional piston mechanism is arranged between the two pre-tightening plate mechanisms, a plurality of connecting rod groups are rotatably connected to the multi-directional piston mechanism, each connecting rod group comprises two connecting rods, one end of two connecting rods in the same connecting rod group are rotatably connected to the two pre-tightening plate mechanisms respectively, and the two pre-tightening plate mechanisms are connected by a plurality of telescopic tubes.

[0008] Furthermore, an upper packing layer is formed between one of the pre-tightening plate mechanisms and the upper packing plate, and a lower packing layer is formed between the other pre-tightening plate mechanism and the lower packing plate, and both the upper packing layer and the lower packing layer are filled with packing.

[0009] Furthermore, each of the pre-tensioning plate mechanisms includes a connecting ring, two of the connecting rings are slidably connected to a plurality of guide rods, one adjacent side of the two connecting rings is fixedly connected to a second porous plate, the other side of the two connecting rings is rotatably connected to a first porous plate, and both ends of the plurality of telescopic tubes are connected to the openings of the two second porous plates.

[0010] Furthermore, the multi-directional piston mechanism includes a connecting shell, both ends of which are fixedly connected to limit abutment plates, the two limit abutment plates respectively abut against two first porous plates, the side walls of the connecting shell are fixedly connected with plungers at positions corresponding to multiple guide rods, two connecting rods at the same guide rod are rotatably connected to the movable end of the plunger, a multi-head pipe is fixedly connected through the side wall of the connecting shell, the rodless cavities of the multiple plungers are connected to the multi-head pipe, and a pressure sensor is fixed on the side wall of the rod cavity of each plunger.

[0011] Furthermore, a plurality of slide grooves are provided on the end face of each of the connecting rings, a slider is fixedly connected to the end face of each of the first porous plates at positions corresponding to the plurality of slide grooves, a ball is embedded on the bottom surface of each slider, and each ball rolls inside the corresponding slide groove.

[0012] Furthermore, a mounting groove is provided on the end face of each connecting ring at positions corresponding to the multiple guide rods, a first spur gear is rotatably connected to the bottom of each mounting groove, a first tooth groove is circumferentially provided on the side wall of each first porous plate, the first spur gear is meshed with the first tooth groove for transmission, and a stirring rod is fixedly connected to the end face of each first porous plate.

[0013] Furthermore, second tooth grooves are formed in the side walls of each of the guide rods, a first bevel gear is fixedly connected to one end of the rotating shaft of each of the first spur gears, brackets are fixedly connected to both sides of the top end of each of the mounting grooves, a second spur gear is rotatably connected between the side walls of the two brackets in the same mounting groove, each of the second spur gears is in meshing transmission with the second tooth groove, a second bevel gear is fixedly connected to the rotating shaft of each of the second spur gears, and each of the second bevel gears is in meshing transmission with the first bevel gear in the corresponding mounting groove.

[0014] Furthermore, a steam outlet is provided at the top end of the rectifying column, a discharge pipe is fixedly connected through the bottom end of the rectifying column, a steam inlet is provided at the lower end of the side wall of the rectifying column, a liquid inlet pipe is fixedly connected through the upper end of the side wall of the rectifying column, a demister and a perforated pipe are fixedly connected inside the rectifying column, the demister is arranged above the perforated pipe, the perforated pipe is arranged above the upper packing plate, and the liquid inlet pipe is communicated with the perforated pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By arranging the pre-tightening plate mechanism, the multi-directional piston mechanism and the connecting rod to compress the packing, during the long-term use of the equipment, the packing is deformed, resulting in the collapse of the packing and the change of the stacking state. When a large cavity is generated in some areas of the packing layer, the pre-tightening force applied by the multi-directional piston mechanism can continue to drive the pre-tightening plate mechanism to further compress the packing through the connecting rod, eliminating the large cavity.

[0016] 2. By arranging the mutual cooperation of the guide rod, the connecting ring, the first perforated plate and the stirring rod, the first perforated plate drives the stirring rod to rotate. Since the packing is in a compressed state, the stirring rod can drive the whole packing to twist, the adhered packing is displaced and separated, and at the same time, when a cavity is generated due to the collapse of the packing, the packing can be rearranged, so that the cavity area is refilled. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic cross-sectional structure diagram inside the rectifying column of the present invention; Figure 3 is a schematic connection diagram of the pre-tightening plate mechanism and the multi-directional piston mechanism part of the present invention; Figure 4 is a schematic structure diagram of the multi-directional piston mechanism part of the present invention; Figure 5 In the present invention Figure 4 is an enlarged schematic diagram of the structure of part A; Figure 6 is a schematic structure diagram of the plunger and the multi-head connecting pipe part of the present invention; Figure 7 Schematic diagram of the connection between the connecting ring and the guide rod part in the present invention; Figure 8 In the present invention Figure 7 Enlarged schematic diagram of the structure of part B in Figure 9 Schematic diagram of the structure of the first perforated plate and the second perforated plate parts in the present invention; Figure 10 Schematic diagram of the structure of the slider and the ball parts in the present invention.

[0018] In the figure: 1, rectifying column; 11, steam outlet; 12, discharge pipe; 13, steam inlet; 14, liquid inlet pipe; 15, demister; 16, perforated pipe row; 2, upper packing plate; 3, lower packing plate; 4, guide rod; 41, second tooth groove; 5, pre-tightening plate mechanism; 51, connecting ring; 511, chute; 512, installation groove; 513, first spur gear; 514, first bevel gear; 515, bracket; 516, second spur gear; 517, second bevel gear; 52, first perforated plate; 521, first tooth groove; 522, slider; 523, ball; 524, stirring rod; 53, second perforated plate; 6, support block; 7, spring; 8, multi-directional piston mechanism; 81, connecting shell; 82, limiting abutting plate; 83, plunger; 84, multi-head connecting pipe; 85, pressure sensor; 9, connecting rod; 10, telescopic pipe. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Such as Figure 1 - Figure 6As shown in the figure, a rectifying device for the preparation of isooctyl mercaptoacetate includes a rectifying column 1. Inside the rectifying column 1, an upper packing plate 2 and a lower packing plate 3 are fixedly connected. A plurality of guide rods 4 are fixedly connected between the upper packing plate 2 and the lower packing plate 3. The plurality of guide rods 4 connect the upper packing plate 2 and the lower packing plate 3 into a whole, strengthening the stability. A support block 6 is fixedly connected to each guide rod 4. Two pre-tightening plate mechanisms 5 are slidably connected to the plurality of guide rods 4 together, for pressing the packing. The two pre-tightening plate mechanisms 5 are arranged in a mirror image at both ends of the plurality of support blocks 6. The two pre-tightening plate mechanisms 5 and the plurality of support blocks 6 are elastically connected by springs 7. The springs 7 keep a certain distance between the two pre-tightening plate mechanisms 5 initially. A multi-directional piston mechanism 8 is arranged between the two pre-tightening plate mechanisms 5. The multi-directional piston mechanism 8 is used to apply a pre-tightening force. A plurality of link groups are rotatably connected to the multi-directional piston mechanism 8. Each link group includes two links 9. One ends of the two links 9 in the same link group are respectively rotatably connected to the two pre-tightening plate mechanisms 5. The links 9 are used to drive the two pre-tightening plate mechanisms 5 to move.

[0021] The multi-directional piston mechanism 8 is externally connected to a pressure source. Initially, the two pre-tightening plate mechanisms 5 are elastically connected to the support blocks 6 by springs 7 and maintain a certain distance. When in use, by pressurizing the inside of the multi-directional piston mechanism 8 to push the plurality of link groups rotatably connected to it, the two links 9 in each link group are arranged at a certain angle (as Figure 4 shown). Under the push of the multi-directional piston mechanism 8, the two links 9 in each link group rotate in the direction away from each other to increase the angle formed by them, thereby driving the two pre-tightening plate mechanisms 5 to slide away from each other along the plurality of guide rods 4 for pressing the packing. During the long-term use of the device, if the packing deforms, causing the packing to collapse and change the stacking state, resulting in larger cavities in some areas of the packing layer, the pre-tightening force applied by the multi-directional piston mechanism 8 can continue to drive the pre-tightening plate mechanism 5 to further press the packing through the link 9 to eliminate the larger cavities.

[0022] An upper packing layer is formed between one of the pre-tightening plate mechanisms 5 and the upper packing plate 2, and a lower packing layer is formed between the other pre-tightening plate mechanism 5 and the lower packing plate 3. Both the upper packing layer and the lower packing layer are filled with packing. The packing can be stainless steel θ rings. The two pre-tightening plate mechanisms 5 are connected by a plurality of telescopic tubes 10. In the upper packing layer and the lower packing layer, mass transfer and heat transfer occur between the steam and the liquid to be rectified. The telescopic tubes 10 connect the two packing layers and can adapt to the change in the distance between the two pre-tightening plate mechanisms 5 through their own telescoping.

[0023] At the top of the rectifying column 1, there is a steam outlet 11. The steam outlet 11 is connected to an external condenser through a pipeline. At the bottom of the rectifying column 1, there is a discharge pipe 12 fixedly connected through it. At the lower end of the side wall of the rectifying column 1, there is a steam inlet 13. Both the discharge pipe 12 and the steam inlet 13 are connected to an external reboiler. At the upper end of the side wall of the rectifying column 1, there is a liquid inlet pipe 14 fixedly connected through it, which is used to input the liquid to be rectified. Inside the rectifying column 1, there are a demister 15 and a perforated pipe 16 fixedly connected. The demister 15 is arranged above the perforated pipe 16 and is used to reduce the entrained liquid droplets in the discharged steam. The perforated pipe 16 is arranged above the upper packing plate 2. The liquid inlet pipe 14 is communicated with the perforated pipe 16, so that the input liquid is evenly distributed and discharged downward.

[0024] Each pre-tightening plate mechanism 5 includes a connecting ring 51. Both connecting rings 51 are slidably connected through a plurality of guide rods 4. On the adjacent sides of the two connecting rings 51, there are second perforated plates 53 fixedly connected. On the other sides of the two connecting rings 51, there are first perforated plates 52 rotatably connected. Both ends of a plurality of telescopic tubes 10 are connected to the openings of the two second perforated plates 53, so as to communicate the chambers of the two connecting rings 51, so that the liquid is evenly distributed again after falling from the upper packing layer and then enters the lower packing layer. The first perforated plate 52 and the second perforated plate 53 form a chamber inside the connecting ring 51. The liquid enters the chamber and forms a liquid level with a certain height.

[0025] The multi-directional piston mechanism 8 includes a connecting shell 81. At both ends of the connecting shell 81, there are limit abutting plates 82 fixedly connected. The two limit abutting plates 82 respectively abut against the two first perforated plates 52. At the positions corresponding to the plurality of guide rods 4 on the side wall of the connecting shell 81, there are plungers 83 fixedly connected. At the same guide rod 4, the two connecting rods 9 are rotatably connected to the movable ends of the plungers 83. On the side wall of the connecting shell 81, there is a multi-head connecting pipe 84 fixedly connected through it. The rodless chambers of the plurality of plungers 83 are all communicated with the multi-head connecting pipe 84. The multi-head connecting pipe 84 is externally connected to a pressure source, which is used to pressurize the inside of the plungers 83. On the side wall of the rod chamber of each plunger 83, there is a pressure sensor 85 fixedly installed, which is used to detect the pressure inside the plunger 83, so as to control the pre-tightening force applied by the multi-directional piston mechanism 8 to the pre-tightening plate mechanism 5.

[0026] Specifically, before rectification, packing is filled into the upper and lower packing layers. A flexible isolation cover (not shown in the figure) is provided between the upper packing plate 2 and the first perforated plate 52, and between the lower packing plate 3 and another first perforated plate 52, so that the packing is isolated from the inner wall of the rectification column 1. It should be noted that the guide rod 4 is outside the flexible isolation cover, and multiple holes of the first perforated plate 52 itself are inside the flexible isolation cover. Then, through an external pressure source and a multi-head connecting pipe 84, the inside of the rodless chambers of multiple plungers 83 is pressurized, so that the movable ends of the plungers 83 extend and push two connecting rods 9. The two connecting rods 9 are arranged at a certain angle. When the two connecting rods 9 rotate, the angle between them increases and they respectively push two connecting rings 51 to move along the guide rod 4, so that the two connecting rings 51 move away from each other and respectively press the packing tightly. And the pressure in the plunger 83 is detected by a pressure sensor 85 to facilitate the control of the applied pre-tightening force.

[0027] When rectifying isooctyl thioglycolate, packing is filled into the upper and lower packing layers. The liquid is introduced through the liquid inlet pipe 14 at the upper end of the side wall of the rectification column 1, and then enters the multi-perforated pipe 16 and is evenly distributed and then drops. The steam is introduced through the steam inlet 13 at the lower end of the side wall of the rectification column 1. The steam and the liquid carry out mass transfer and heat transfer in the upper and lower packing layers. During the long-term use of the equipment, if the packing is deformed, resulting in the packing collapsing and changing the stacking state, and large cavities are generated in some areas of the packing layer, the pre-tightening force applied by the multi-directional piston mechanism 8 can continue to drive the pre-tightening plate mechanism 5 to further press the packing tightly through the connecting rod 9, eliminating the large cavities. At this time, the pressure in the plunger 83 decreases, and the pressure sensor 85 detects the pressure change, and the pressure is supplemented again through the external pressure source to ensure that the packing is fully pressed and used to cope with the further collapse of the packing. When the packing is severely deformed, the packing is replaced.

[0028] As Figure 7 - Figure 10 As shown in the figure, a plurality of sliding grooves 511 are provided on the end surface of each connecting ring 51. At the positions corresponding to the plurality of sliding grooves 511 on the end surface of each first perforated plate 52, a slider 522 is fixedly connected. A ball 523 is embedded in the bottom surface of each slider 522, and each ball 523 rolls inside the corresponding sliding groove 511. Through the sliding groove 511 and the ball 523, the first perforated plate 52 can rotate within the range of the sliding groove 511.

[0029] At the positions corresponding to the plurality of guide rods 4 on the end surface of each connecting ring 51, mounting grooves 512 are provided. At the bottom of each mounting groove 512, a first spur gear 513 is rotatably connected. On the side wall of each first perforated plate 52, a first tooth groove 521 is provided along the circumferential direction. The first spur gear 513 is in meshing transmission with the first tooth groove 521. A stirring rod 524 is fixedly connected to the end surface of each first perforated plate 52 for separating the adhered packing.

[0030] A second tooth groove 41 is formed on the side wall of each guide rod 4. One end of the rotating shaft of each first spur gear 513 is fixedly connected with a first bevel gear 514. Two sides of the top end of each mounting groove 512 are fixedly connected with brackets 515. A second spur gear 516 is rotatably connected between the side walls of the two brackets 515 of the same mounting groove 512. Each second spur gear 516 is in meshing transmission with the second tooth groove 41. A second bevel gear 517 is fixedly connected to the rotating shaft of each second spur gear 516. Each second bevel gear 517 is in meshing transmission with the first bevel gear 514 in the corresponding mounting groove 512.

[0031] Specifically, when the connecting ring 51 slides along the guide rod 4, it can drive the second bevel gear 517 to rotate through the meshing of the second spur gear 516 and the second tooth groove 41. Further, the rotation of the first spur gear 513 is driven through the meshing of the second bevel gear 517 and the first bevel gear 514 for driving the rotation of the first perforated plate 52. When the first spur gear 513 is in meshing transmission with the first tooth groove 521, the first perforated plate 52 drives the stirring rod 524 to rotate. Since the packing is in a compressed state, at this time, the stirring rod 524 can drive the whole packing to twist, causing the adhered packing to move and separate, and at the same time, when a cavity is generated due to the collapse of the packing, the packing can be rearranged so that the cavity area is refilled.

[0032] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0033] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A distillation device for preparing isooctyl thioglycolate, comprising a distillation tower (1), wherein an upper packing plate (2) and a lower packing plate (3) are fixedly connected inside the distillation tower (1), characterized in that: A plurality of guide rods (4) are fixedly connected between the upper filling plate (2) and the lower filling plate (3), each of the guide rods (4) is fixedly connected to a support block (6), and two pre-tightening plate mechanisms (5) are slidably connected to the plurality of guide rods (4), the two pre-tightening plate mechanisms (5) are arranged at both ends of the plurality of support blocks (6) in a mirror-image manner, the two pre-tightening plate mechanisms (5) and the plurality of support blocks (6) are elastically connected via springs (7), a multi-directional piston mechanism (8) is provided between the two pre-tightening plate mechanisms (5), a plurality of connecting rod groups are rotatably connected to the multi-directional piston mechanism (8), each of the connecting rod groups comprises two connecting rods (9), one end of the two connecting rods (9) in the same connecting rod group is rotatably connected to the two pre-tightening plate mechanisms (5), and the two pre-tightening plate mechanisms (5) are connected via a plurality of telescopic tubes (10).

2. A distillation device for preparing isooctyl thioglycolate according to claim 1, characterized in that: An upper packing layer is formed between one of the pre-tightening plate mechanisms (5) and the upper packing plate (2), and a lower packing layer is formed between the other pre-tightening plate mechanism (5) and the lower packing plate (3), and both the upper packing layer and the lower packing layer are filled with packing.

3. A distillation device for preparing isooctyl thioglycolate according to claim 1, characterized in that: Each of the preload plate mechanisms (5) comprises a connecting ring (51), the two connecting rings (51) are slidably connected to the plurality of guide rods (4), the adjacent sides of the two connecting rings (51) are fixedly connected to the second porous plate (53), the other sides of the two connecting rings (51) are rotatably connected to the first porous plate (52), and both ends of the plurality of telescopic tubes (10) are connected to the openings of the two second porous plates (53).

4. A distillation device for preparing isooctyl thioglycolate according to claim 3, characterized in that: The multi-directional piston mechanism (8) comprises a connecting shell (81), both ends of the connecting shell (81) are fixedly connected to limit abutment plates (82), the two limit abutment plates (82) respectively abut against two first porous plates (52), the side wall of the connecting shell (81) is fixedly connected to plungers (83) at positions corresponding to the plurality of guide rods (4), the two connecting rods (9) at the same guide rod (4) are rotatably connected to the movable end of the plunger (83), the side wall of the connecting shell (81) is penetrated and fixedly connected to a multi-head pipe (84), the rodless cavities of the plurality of plungers (83) are connected to the multi-head pipe (84), and a pressure sensor (85) is fixed on the side wall of the rod cavity of each plunger (83).

5. A distillation device for preparing isooctyl thioglycolate according to claim 3, characterized in that: A plurality of slide grooves (511) are provided on the end surface of each of the connecting rings (51); a slider (522) is fixedly connected to the end surface of each of the first porous plates (52) at positions corresponding to the plurality of slide grooves (511); a ball (523) is embedded in the bottom surface of each of the sliders (522); and each of the ball (523) rolls inside the corresponding slide groove (511).

6. A distillation device for preparing isooctyl thioglycolate according to claim 3, characterized in that: A mounting groove (512) is provided on the end surface of each of the connecting rings (51) at positions corresponding to the plurality of guide rods (4); a first spur gear (513) is rotatably connected to the bottom of each of the mounting grooves (512); a first tooth groove (521) is provided on the side wall of each of the first porous plates (52) along the circumferential direction; the first spur gear (513) meshes with the first tooth groove (521) for transmission; and a stirring rod (524) is fixedly connected to the end surface of each of the first porous plates (52).

7. A distillation device for preparing isooctyl thioglycolate according to claim 6, characterized in that: A second tooth groove (41) is formed on the side wall of each guide rod (4); one end of the rotating shaft of each first spur gear (513) is fixedly connected to a first bevel gear (514); both sides of the top of each mounting groove (512) are fixedly connected to brackets (515); a second spur gear (516) is rotatably connected between the side walls of the two brackets (515) of the same mounting groove (512); each second spur gear (516) is meshed with the second tooth groove (41) for transmission; a second bevel gear (517) is fixedly connected to the rotating shaft of each second spur gear (516); each second bevel gear (517) is meshed with the first bevel gear (514) of the mounting groove (512) for transmission.

8. A distillation device for preparing isooctyl thioglycolate according to claim 1, characterized in that: The top of the distillation tower (1) is provided with a steam outlet (11), the bottom of the distillation tower (1) is penetrated and fixedly connected with a discharge pipe (12), the lower end of the side wall of the distillation tower (1) is provided with a steam inlet (13), the upper end of the side wall of the distillation tower (1) is penetrated and fixedly connected with a liquid inlet pipe (14), the inside of the distillation tower (1) is fixedly connected with a demister (15) and a porous row pipe (16), the demister (15) is arranged above the porous row pipe (16), the porous row pipe (16) is arranged above the upper packing plate (2), and the liquid inlet pipe (14) is connected to the porous row pipe (16).

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