Ethylene glycol diacetate preparation reaction equipment

Abstract

The invention relates to the technical field of ethylene glycol diacetate preparation, and discloses ethylene glycol diacetate preparation reaction equipment, which comprises a tower body, a reboiler and a condenser, the top of the tower body is connected with the condenser, the bottom of the tower body is connected with the reboiler, a tower plate is installed in the tower body, the tower plate is driven to rotate in the tower body, and the tower plate has a first state and a second state, in the first state, the tower plate is of an L-shaped structure and is horizontally arranged, and in the second state, the tower plate is of a linear structure and is inclined downwards; the tower plate provided by the invention can be kept in the second state in the cleaning process, and when water flows on the tower plate in the second state, the tower plate is of a linear structure, so that the tower plate in the state does not influence impact force generated by flowing of the water, and the tower plate can be smoothly flushed.

Description

Technical Field

[0001] The invention relates to the technical field of ethylene glycol diacetate preparation, in particular to a reaction device for preparing ethylene glycol diacetate. Background Art

[0002] Ethylene glycol diacetate is an organic compound, a colorless liquid, which is obtained by the esterification reaction of ethylene glycol and acetic acid in the presence of a catalyst. After the crude ethylene glycol diacetate is obtained, it is necessary to separate the pure ethylene glycol diacetate from the crude ethylene glycol diacetate through a distillation tower to remove unreacted raw materials, by-products and other impurities that may exist.

[0003] For example, a patent with announcement number CN110215729B and announcement date June 29, 2021 discloses a plate-type distillation tower, which relates to the technical field of chemical equipment, and comprises a tower body, a tower kettle and a tower base, the tower body is provided with a gas outlet, a reflux port, a feed port and a discharge port, and the tower body is provided with several layers of tower plates, characterized in that the feed port comprises a first feed port and a second feed port, a cylindrical first distillation chamber is provided at the top of the tower body, a hemispherical head is provided at the top of the first distillation chamber, the gas outlet is provided at the top of the head, the reflux port is provided below the head on the cylinder wall of the first distillation chamber, the reflux port is connected to a reflux pipe inside the first distillation chamber, and a sieve support plate, a first A grid plate, a filler, and a second grid plate; the gaps between the tower plates decrease from top to bottom; a first baffle and a second baffle are relatively arranged on the side edges of both ends of the tower plate, and a threaded hole is opened on the second baffle plate, and the tower plate is staggeredly fixed to the inner wall of the cylinder of the tower body through the threaded holes, sealing gaskets and screws; a cone is arranged between the first fractionation chamber and the tower body; a first partition plate is installed inside the tower body below the cone; a second thermometer port and the first feed port are arranged on the cylinder wall of the tower body below the first partition plate; a second partition plate is arranged below the first partition plate, and the tower plates are respectively installed between the first partition plate and the second partition plate and between the second partition plate and the tower kettle, and a third thermometer port and the second feed port are arranged on the cylinder wall of the tower body below the second partition plate.

[0004] After the existing crude fat (unpurified ethylene glycol diacetate) has been distilled and purified in a distillation tower for a long time, the tower needs to be cleaned. The cleaning of the distillation tower is usually to remove the dirt, sediment, grease and other impurities accumulated in the tower that may affect the distillation efficiency and product quality. The existing cleaning methods are mostly water flushing, using the impact force generated by the flow of water in the distillation tower to flush away dirt or sediment, etc. However, in the existing distillation tower, as shown in the above-mentioned patent announcement, the mainstream tower plates are all L-shaped structures, and overflow is used between the multiple tower plates to allow the water to flow to the lower tower plates. The overflow method affects the impact force generated by the flow of water in the distillation tower, especially the cleaning of the bottom of the L-shaped structure, thereby affecting the flushing effect of dirt or sediment in the distillation tower. Summary of the invention

[0005] The purpose of the present invention is to provide a reaction device for preparing ethylene glycol diacetate to solve the above-mentioned shortcomings in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical scheme: a reaction device for preparing ethylene glycol diacetate, comprising a tower body, a reboiler and a condenser, wherein the top of the tower body is connected to the condenser, and the bottom is connected to the reboiler, and a tower plate is installed inside the tower body, and the tower plate is driven to rotate inside the tower body, and the tower plate includes a first state and a second state. In the first state, the tower plate is in an L-shaped structure and is arranged horizontally, and in the second state, the tower plate is in a straight line structure and is in an inclined state.

[0007] Preferably, it also includes a driving mechanism, which is used to drive the tower plate to rotate in the tower body.

[0008] Preferably, holes are provided on the tower plate. When the tower plate is in a first state, the holes are in an open state, and when the tower plate is in a second state, the holes are in a closed state.

[0009] Preferably, the tower plate includes a plate body and a sealing plate, a transmission shaft is provided in the middle of the plate body, both ends of the transmission shaft are rotatably connected to the inner wall of the tower body, and one end thereof passes through the tower body and is connected to the driving mechanism, the sealing plate is slidably installed on the upper plate surface of the plate body, guide blocks are provided on both sides of the sealing plate, and a guide groove is opened on the inner wall of the tower body, the guide block is located inside the guide groove, and forms a sliding guide fit with the guide groove.

[0010] Preferably, the tower plate further comprises a connecting rod and a stopper, wherein the stopper is rotatably connected to one end of the plate member, one end of the connecting rod is rotatably connected to the stopper, and the other end is rotatably connected to the sealing plate.

[0011] Preferably, a plurality of groups of packing layers are arranged in the tower body, and the plurality of groups of packing layers are interspersed between the plurality of groups of tower plates.

[0012] Preferably, the packing layer comprises two groups of support plates, the support plates are connected to the inner wall of the tower body, a cavity is formed between the two groups of support plates, the packing is filled in the cavity, and round holes are opened on the support plates.

[0013] Preferably, a sealing mechanism is further included, which cooperates with the tower plate and is used to seal the circular holes on the bottom support plate of the packing layer.

[0014] Preferably, the tower plate comprises a first tower plate and a second tower plate, the first tower plate is located below the packing layer, and the first tower plate cooperates with a sealing mechanism to seal the circular holes on the bottom support plate of the packing layer.

[0015] Preferably, the sealing mechanism includes a movable plate with a through hole, a column is fixedly installed on the lower surface of the support plate, the column corresponds to the through hole on the movable plate, a vertical groove is also provided inside the tower body, and protrusions are provided at both ends of the movable plate, the protrusions are located inside the vertical grooves, and form a sliding guide fit with the vertical grooves.

[0016] The beneficial effect of the present invention is that in the above technical scheme, the tower plate provided by the present invention can be maintained in the second state during the cleaning process. When water flows on the tower plate in the second state, since the tower plate at this time is a straight structure, the tower plate in this state will not affect the impact force generated by the flow of water, so that the tower plate can be smoothly rinsed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A partial perspective view of a tower body provided by an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of a tower plate structure provided by an embodiment of the present invention;

[0020] Figure 3 The embodiment of the present invention provides Figure 1 A in the enlarged view;

[0021] Figure 4 A comparative schematic diagram of the second state of adjacent tower plates provided in an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1. Tower body; 11. Feed pipe; 12. Water pipe; 13. Guide groove; 14. Vertical groove; 2. Reboiler; 3. Condenser; 4. Tower plate; 41. Hole; 42. Plate body; 43. Sealing plate; 44. Transmission shaft; 45. Guide block; 46. Block; 47. Connecting rod; 48. First tower plate; 49. Second tower plate; 5. Circulation pipeline; 6. Driving mechanism; 7. Packing layer; 71. Support plate; 72. Packing; 73. Round hole; 8. Sealing mechanism; 81. Movable plate; 82. Through hole; 83. Column. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] In the description of the present invention, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] like Figure 1-4 As shown, an embodiment of the present invention provides a reaction device for preparing ethylene glycol diacetate, including a tower body 1, a reboiler 2 and a condenser 3. The top of the tower body 1 is connected to the condenser 3, and the bottom is connected to the reboiler 2. A tower plate 4 is installed inside the tower body 1. The tower plate 4 is driven to rotate inside the tower body 1. The tower plate 4 includes a first state and a second state. In the first state, the tower plate 4 is in an L-shaped structure and is arranged horizontally. In the second state, the tower plate 4 is in a straight line structure and is in an inclined state.

[0027] Specifically, Figure 1As shown, the tower body 1 is arranged vertically, the top of the tower body 1 is connected to the condenser 3 through the circulation pipeline 5, and the bottom is also connected to the reboiler 2 through the circulation pipeline 5. The outer wall of the tower body 1 is also connected to the feed pipe 11 and the water pipe 12. The feed pipe 11 is used to feed the crude fat, that is, ethylene glycol diacetate containing impurities, into the tower body 1. The crude fat flows through multiple groups of tower plates 4 and enters the reboiler 2. After being heated by the reboiler 2, the generated steam is transported to the tower body 1 and rises in the tower body 1. The steam contacts with the crude fat during the rising process, and transfers mass and heat with the crude fat. Finally, the rising hot steam enters In the condenser 3, part of the hot steam is directly discharged from the inside of the condenser 3, which is the top product of the tower, and the other part of the hot steam is condensed to produce condensed water, which is transported to the inside of the tower body 1 again through the circulation pipe 5, and contacts with the hot steam and crude fat, generating mass transfer and heat transfer, and finally flows into the reboiler 2 with the crude fat, wherein the reboiler 2 partially vaporizes the incoming liquid, and the generated steam rises along the tower body 4, and the remaining liquid is the bottom product of the tower, and this reciprocating process is used to realize the distillation of the crude fat, the top product of the tower is ethylene glycol diacetate after distillation, and the bottom product is the separated impurities, etc.;

[0028] In the tower body 1, multiple groups of tower plates 4 are arranged vertically, and the tower plates 4 include a first state and a second state. The first state is the state of the tower plates 4 during the distillation of crude fat, which is also the initial state. In the first state, the tower plates 4 are in a horizontally arranged L-shaped structure, and liquid overflows from the tower plates 4 in sequence; when the tower plates 4 are in the second state, that is, the tower plates 4 have finished distilling the crude fat and need to be flushed. In this state, the tower plates 4 are in a straight line structure and are in an inclined state. In this embodiment, a driving mechanism 6 is provided, and the driving mechanism 6 is used to drive the tower plates 4 to rotate in the tower body 1. In the tower plates 4 in the second state, during the cleaning process, water is first transported to the inside of the tower body 1 through the water pipe 12, and the water flows on the tower plates 4 in the second state, so the tower plates 4 at this time are straight. Line structure, so the tower plate 4 in this state will not affect the impact force generated by the flow of water, and the inclined setting of the tower plate 4 can also play a role in diversion, that is, the water flowing on the upper tower plate 4 is diverted to the end of the lower tower plate 4 with a higher horizontal height, so that the water flow can flow through the upper plate surface of the entire tower plate 4, thereby completing the flushing of the entire upper plate surface; it should be supplemented that the driving mechanism 6 can be a rotating driving mechanism 6 such as a motor and a rotating cylinder, and the driving mechanism 6 is externally installed on the outer wall of the tower body 1, and the output shaft of the driving mechanism 6 passes through the tower body 1 and is connected to one end of the tower plate 4. Because there are multiple groups of tower plates 4, in this embodiment, multiple groups of driving mechanisms 6 can also be set to connect multiple groups of tower plates 4, and transmission mechanisms such as belts and chains can also be set to connect multiple groups of tower plates 4 in series to reduce the use of the driving mechanism 6.

[0029] In another embodiment of the present invention, further, a hole 41 is opened on the tower plate 4. When the tower plate 4 is in the first state, the hole 41 is in an open state, and when the tower plate 4 is in the second state, the hole 41 is in a closed state.

[0030] Specifically, the holes 41 opened on the tower plate 4 are used for hot steam to rise and pass through the tower plate 4, and the gas-liquid two phases are fully in contact on the tower plate 4 to realize the mass transfer process. This is the prior art, and in the above embodiment, during the flushing process, water will flow on the tower plate 4. Since the water may contain fine solid particles, the flow of water on the surface of the tower plate 4 may cause some solid particles to enter the holes 41, thereby causing the hole 41 to be blocked, thereby affecting the flow of hot steam in the holes 41 of the tower plate 4 in the first state, that is, reducing the mass transfer efficiency between the hot steam and the liquid on the tower plate 4. Therefore, in this embodiment, when the tower plate 4 is in the second state, that is, the entire tower body 1 is in the cleaning process, the hole 41 is in a closed state to prevent solid particles in the water from entering the hole 41.

[0031] Furthermore, the tower plate 4 includes a plate body 42 and a sealing plate 43. A transmission shaft 44 is provided in the middle of the plate body 42. Both ends of the transmission shaft 44 are rotatably connected to the inner wall of the tower body 1, and one end thereof penetrates the tower body 1 and is connected to the driving mechanism 6. The sealing plate 43 is slidably installed on the upper plate surface of the plate body 42. Guide blocks 45 are provided on both sides of the sealing plate 43. A guide groove 13 is opened on the inner wall of the tower body 1. The guide block 45 is located inside the guide groove 13 and forms a sliding guide fit with the guide groove 13.

[0032] Specifically, since the tower body 1 is cylindrical and the cavity therein is cylindrical, the axis of the transmission shaft 44 is perpendicular to the vertical center axis of the tower body 1, that is, the transmission shaft 44 is arranged along the radial direction of the tower body. When the driving mechanism 6 drives the tower plate 4 to rotate, Figure 2 The tower plate 4 shown can rotate in the inner cavity of the cylindrical tower body 4. The upper plate surface of the plate body 42 is provided with a slide groove with a T-shaped cross-section. The groove direction of the slide groove is consistent with the length direction of the plate body 42. A T-shaped slider (not shown) adapted to the slide groove is also installed at the bottom of the sealing plate 43. The slider is located inside the slide groove and forms a sliding guide with the slide groove. This is a prior art and is not described in detail. The guide groove 13 is an inclined groove. The distance between the upper end of the guide groove 13 and the transmission shaft 44 is greater than the distance between the lower end and the transmission shaft 44. That is to say, when the guide block 45 moves from top to bottom in the guide groove 13, the guide block 45 will gradually move to the side close to the transmission shaft 44. The sealing plate 43 is also provided with a hole 41, and the aperture of the hole 41 is much larger than the aperture of the hole 41 on the plate body 42.

[0033] When the tower plate 4 is in the first state, the hole 41 on the sealing plate 43 is connected with the hole 41 on the plate body 42, the guide block 45 is located at the upper end of the guide groove 13, and the slider on the sealing plate 43 is located at one end of the slide groove close to the transmission shaft 44. When the tower plate 4 needs to be transformed from the first state to the second state, the driving mechanism 6 drives the transmission shaft 44 to rotate in the tower body 1, and the rotation of the transmission shaft 44 drives the plate body 42 to rotate, that is, the plate body 42 revolves around the transmission shaft 44, and the rotation of the plate body 42 drives the sealing plate 43 The guide block 45 rotates synchronously. At this time, the guide block 45 slides from top to bottom in the guide groove 13, and the guide block 45 gradually moves to the side close to the transmission shaft 44, and drives the sealing plate 43 to slide synchronously on the plate body 42, so that the holes 41 on the sealing plate 43 and the holes 41 on the plate body 42 are staggered with each other, and the solid plate part of the sealing plate 43 is used to seal the holes 41 on the plate body 42, thereby avoiding the problem of solid particles in the water entering the holes 41 during the flushing process and causing the holes 41 to be blocked.

[0034] Furthermore, the tower plate 4 further includes a connecting rod 47 and a stopper 46 . The stopper 46 is rotatably connected to one end of the plate. One end of the connecting rod 47 is rotatably connected to the stopper 46 , and the other end is rotatably connected to the sealing plate 43 .

[0035] Specifically, Figure 2 As shown, in the first state, the stopper 46 is arranged vertically on the plate body 42, and the plate body 42 and the stopper 46 are combined to form an L-shaped structure. The connecting rod 47 is located on the side of the stopper 46 close to the transmission shaft 44. When the tower plate 4 changes from the first state to the second state, the tower plate 4 rotates as a whole, and the sealing plate 43 moves to the side close to the stopper. The movement of the sealing plate 43 pushes the stopper 46 to rotate on the plate body 42 through the connecting rod 47, that is, the connecting rod 47 pushes the stopper 46 to rotate to the side away from the sealing plate 43, so that the stopper 46 moves from the plate body 4 2 is rotated from the vertical state to a state in which the plate body 42 is located in the same straight line, that is, the tower plate 4 is in an inclined straight line structure or a nearly straight line structure at this time. The rotation of the stopper 46 reduces the impact force of the water flow on the tower plate 4 during the cleaning process, so that the multi-layer tower plate 4 can be washed by the water flow with a larger impact force. It should be supplemented that when the tower plate 4 changes from the first state to the second state, the side of the tower plate 4 close to the stopper 46 moves upward and the other end moves downward. After moving to the second state, the multiple groups of tower plates 4 are in the following state. Figure 4 In the layout structure shown in the figure, when the tray 4 is in the second state, the distance between the transmission shaft 44 and the end of the tray 4 near the stopper 46 is greater than the distance between the transmission shaft 44 and the other end of the tray 4. Therefore, between two adjacent trays 4, the lower end of the upper tray 4 is located on the side of the upper end of the lower tray 4 near the central axis of the tower body 1, that is, Figure 4 In the structure shown, under this restriction, the water diverted from the lower end of the upper tower plate 4 can smoothly flow into the lower tower plate 4 to achieve diversion and flushing between the multiple tower plates 4.

[0036] In another embodiment of the present invention, further, a plurality of groups of packing layers 7 are arranged in the tower body 1 , and the plurality of groups of packing layers 7 are interspersed between the plurality of groups of tower plates 4 .

[0037] Specifically, the packing layer 7 includes two groups of support plates 71, the support plates 71 are connected to the inner wall of the tower body 1, a chamber is formed between the two groups of support plates 71, the packing 72 is filled in the chamber, and a circular hole 73 is opened on the support plate 71. The packing 72 can be a saddle ring, a step ring, a ball ring, a porcelain ball, etc. In actual use, the gas and the liquid are in contact in the packing layer 7, and the packing layer 7 increases the contact area between the gas and liquid phases, thereby improving the mass transfer efficiency.

[0038] In the above embodiment, the water flow during flushing flows on the tower plate 4, and the tower plate 4 plays a role in guiding the water flow. However, since a packing layer 7 is provided in the tower body 1, the packing layer 7 also needs to be flushed to remove particulate matter and deposits in the gaps therein. Since the water entering the packing layer 7 is guided by the inclined tower plate 4, the water can only enter from one side of the packing layer 7. In other words, the water can only enter a partial area of ​​the packing layer 7 under the guidance effect, resulting in the packing layer 7 being unable to be completely cleaned. Therefore, in this embodiment, further, a sealing mechanism 8 is also included, and the sealing mechanism 8 cooperates with the tower plate 4 to seal the circular hole 73 on the bottom support plate 71 of the packing layer 7.

[0039] Specifically, in the present embodiment, all the tower plates 4 in the tower body 1 are divided into a first tower plate 48 and a second tower plate 49, wherein the first tower plate 4 located below the packing layer 7 is the first tower plate 48, and the tower plates 4 at other positions are the second tower plates 49. The first tower plate 48 cooperates with the sealing mechanism 8 to seal the circular hole 73 on the support plate 71 at the bottom of the packing layer 7. After the circular hole 73 on the support plate 71 is sealed, the water entering the packing layer 7 cannot continue to flow downward, and the water flow will continue to accumulate in the packing layer 7 until the entire packing layer 7 is immersed in water. By immersion, the entire packing layer 7 can be cleaned.

[0040] Furthermore, the sealing mechanism 8 includes a movable plate 81, which is provided with a through hole 82. A column 83 is fixedly installed on the lower surface of the support plate 71, and the column 83 corresponds to the through hole 82 on the movable plate 81. A vertical groove 14 is also provided inside the tower body 1, and protrusions are provided at both ends of the movable plate 81. The protrusions are located inside the vertical groove 14 and form a sliding guide fit with the vertical groove 14.

[0041] Specifically, the movable plate 81 is arranged horizontally and is parallel to the support plate 71. The column 83 is a cylindrical structure. The diameter of the column 83 is slightly smaller than the diameter of the through hole 82 on the movable plate 81. Secondly, there is no structural difference between the first tower plate 48 and the second tower plate 49 and the tower plate 4. It is just a position division of multiple groups of tower plates 4. Only the guide groove 13 at the position corresponding to the first tower plate 48 also has an arc segment, that is, the guide groove 13 as a whole includes an inclined groove segment and an arc segment, and the inclined groove segment is In the above embodiment, the slot section adapted to the tower plate 4 when it rotates from the first state to the second state, and the arc section is the slot section adapted to the tower plate 4 to continue to rotate. The lower end of the inclined slot section is connected to the upper end of the arc section. The arc of the arc section is consistent with the arc of the guide block 45 revolving around the transmission shaft 44 in the second state. Therefore, when the driving mechanism 6 drives the tower plate 4 to continue to rotate on the basis of the second state, the guide block 45 will move from the inclined slot section to the arc section and slide in the arc section. While sliding, the tower plate 4 The plate 4 will also remain in the second state. In actual use, the driving mechanism 6 drives the first tower plate 48 to continue to rotate on the basis of the second state, and the guide block 45 slides in the arc segment. When the first tower plate 48 rotates to a certain angle, the upper end of the first tower plate 48 contacts the movable plate 81, and the rotation of the first tower plate 48 pushes the movable plate 81 to move upward. The rise of the movable plate 81 causes the column 83 to extend into the through hole 82, and the through hole 82 is sealed by the extension of the column 83. At this time, the support plate 71 at the bottom of the packing layer 7 is still at a certain distance from the movable plate 81. After the through hole 82 is sealed, the water flow cannot flow out from under the movable plate 81, and the water flow will be above the movable plate 81. As the amount of accumulated water gradually increases, the packing layer 7 will eventually be immersed in water. Although there is a certain gap between the column 83 and the wall of the through hole 82, the gap is small and the amount of water seeping out is small, so the existence of the gap does not affect the accumulation of water flow, as long as the water output is less than the water input;

[0042] When the water has accumulated to a certain height and the entire packing layer 7 is immersed in the water, the driving mechanism 6 continues to drive the first tower plate 48 to rotate, and the first tower plate 48 continues to drive the movable plate 81 to rise. At this time, the space between the movable plate 81 and the support plate 71 is compressed, and the accumulated water between the two is pushed back into the packing layer 7 through the compression of the space, that is, the accumulated water body is driven to rise as a whole, so that the water body flows from bottom to top in the packing layer 7, thereby increasing the flow speed of the water in the packing layer 7, and indirectly flushing the packing layer 7 by utilizing the accelerated flow speed. Subsequently, the first tower plate 48 is reset and rotated, and the distance between the movable plate 81 and the support plate 71 is opened, so that the water flow enters between the two again, and then the first tower plate 48 is driven to rotate again, and the movable plate 81 is driven to rise to transport the water back to the packing layer 7. This reciprocating process improves the cleaning effect of the packing layer 7 and avoids the problem that it is difficult to clean even by immersion washing.

[0043] Finally, when the packing layer 7 located on the top layer is cleaned, the first tower plate 48 below the packing layer 7 is driven to rotate to the second state, and the movable plate 81 is reset and descended under the action of gravity. A spring can also be arranged in the vertical groove 14, and the two ends of the spring are connected to the inner wall and the protrusion of the tower body 1. The spring contracts when the movable plate 81 rises, and can also drive the movable plate 81 to reset and descend when resetting. Subsequently, the first tower plate 48 below the packing layer 7 to be cleaned is driven to rotate, and the above steps are repeated.

[0044] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A reaction device for preparing ethylene glycol diacetate, comprising a tower body (1), a reboiler (2) and a condenser (3), wherein the top of the tower body (1) is connected to the condenser (3), and the bottom is connected to the reboiler (2), and a tower plate (4) is installed inside the tower body (1), characterized in that: The tower plate (4) is driven to rotate inside the tower body (1), and the tower plate (4) includes a first state and a second state. In the first state, the tower plate (4) is in an L-shaped structure and is arranged horizontally. In the second state, the tower plate (4) is in a straight line structure and is in an inclined state.

2. The ethylene glycol diacetate preparation reaction equipment according to claim 1, characterized in that: It also comprises a driving mechanism (6), which is used to drive the tower plate (4) to rotate inside the tower body (1).

3. The ethylene glycol diacetate preparation reaction equipment according to claim 1, characterized in that: A hole (41) is provided on the tower plate (4). When the tower plate (4) is in a first state, the hole (41) is in an open state. When the tower plate (4) is in a second state, the hole (41) is in a closed state.

4. The ethylene glycol diacetate preparation reaction equipment according to claim 2, characterized in that: The tower plate (4) comprises a plate body (42) and a sealing plate (43). A transmission shaft (44) is provided in the middle of the plate body (42). Both ends of the transmission shaft (44) are rotatably connected to the inner wall of the tower body (1), and one end thereof penetrates the tower body (1) and is connected to a driving mechanism (6). The sealing plate (43) is slidably mounted on the upper plate surface of the plate body (42). Guide blocks (45) are provided on both sides of the sealing plate (43). A guide groove (13) is provided on the inner wall of the tower body (1). The guide block (45) is located inside the guide groove (13) and forms a sliding guide fit with the guide groove (13).

5. The ethylene glycol diacetate preparation reaction equipment according to claim 4, characterized in that: The tower plate (4) further comprises a connecting rod (47) and a stopper (46), wherein the stopper (46) is rotatably connected to one end of the plate member, and one end of the connecting rod (47) is rotatably connected to the stopper (46), and the other end is rotatably connected to the sealing plate (43).

6. The ethylene glycol diacetate preparation reaction equipment according to claim 1, characterized in that: A plurality of groups of packing layers (7) are arranged in the tower body (1), and the plurality of groups of packing layers (7) are interspersed between the plurality of groups of tower plates (4).

7. The ethylene glycol diacetate preparation reaction equipment according to claim 6, characterized in that: The packing layer (7) comprises two groups of support plates (71), the support plates (71) are connected to the inner wall of the tower body (1), a chamber is formed between the two groups of support plates (71), the packing (72) is filled in the chamber, and a circular hole (73) is opened on the support plate (71).

8. The ethylene glycol diacetate preparation reaction equipment according to claim 7, characterized in that: It also includes a sealing mechanism (8), which cooperates with the tower plate (4) and is used to seal the circular hole (73) on the bottom support plate (71) of the packing layer (7).

9. The ethylene glycol diacetate preparation reaction equipment according to claim 8, characterized in that: The tower plate (4) further comprises a first tower plate (48) and a second tower plate (49). The first tower plate (48) is located below the packing layer (7). The first tower plate (48) cooperates with the sealing mechanism (8) to seal the circular hole (73) on the bottom support plate (71) of the packing layer (7).

10. The ethylene glycol diacetate preparation reaction equipment according to claim 9, characterized in that: The sealing mechanism (8) comprises a movable plate (81), a through hole (82) is provided on the movable plate (81), a column (83) is fixedly mounted on the lower surface of the support plate (71), the column (83) corresponds to the through hole (82) on the movable plate (81), a vertical groove (14) is further provided inside the tower body (1), protrusions are provided at both ends of the movable plate (81), the protrusions are located inside the vertical groove (14), and form a sliding guide fit with the vertical groove (14).

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