Fractionation device and fractionation method for propargyl alcohol production

Abstract

The invention discloses a fractionation device and fractionation method for propargyl alcohol production, and relates to the technical field of propargyl alcohol production.The fractionation device comprises a fractionation reaction tower shell, a cooling pipe and a collecting tank, the cooling pipe is connected with the top end of the fractionation reaction tower shell, the cooling pipe is connected with the collecting tank, and the collecting tank is connected with the fractionation reaction tower shell. A collecting structure is arranged at the upper end of the inner wall of the fractionation reaction tower shell and comprises a collecting hopper and a fixed bottom plate; collected liquid is reheated through the heating wire, it is ensured that gas at the gas inlet of the cooling pipe is liquefied less, the propargyl alcohol conversion efficiency can be improved, the propargyl alcohol liquid gathered on the surface of the fixed bottom plate is scraped, less propargyl alcohol liquid can be heated by the heating wire more conveniently, and the propargyl alcohol conversion efficiency is improved. The propargyl alcohol conversion efficiency can also be improved; the liquid at the air inlet of the cooling pipe is collected by the collecting structure, and the heating wire reheats the collected liquefied propargyl alcohol, so that the gas liquefaction of the propargyl alcohol at the air inlet of the cooling pipe is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of propargyl alcohol production, in particular to a fractionation device and a fractionation method for propargyl alcohol production. Background Art

[0002] The production equipment of propargyl alcohol includes a reaction kettle, a fractionation tower, a condenser, a receiver, a dryer and a storage tank, etc. The fractionation tower is used to separate propargyl alcohol from the reaction mixture. There may be plates or fillers in the tower to increase the separation efficiency. The production process of propargyl alcohol includes raw material preparation, synthesis reaction, addition reaction, hydrolysis reaction, separation and purification, fractionation, drying, product storage and packaging and waste treatment. The specific production process may vary depending on the different synthesis methods and equipment used; In the prior art, the propargyl alcohol distillation tower has certain disadvantages when evaporating and fractionating the propargyl alcohol liquid. When the propargyl alcohol liquid enters the air inlet of the cooling tube, part of the gaseous propargyl alcohol will be liquefied, and the liquefied propargyl alcohol will flow down along the inner wall of the distillation tower, thereby affecting the fractionation of the gaseous propargyl alcohol and the efficiency of the conversion of the propargyl alcohol. The liquefied propargyl alcohol accumulates at the fixed bottom plate, which will cause the gaseous propargyl alcohol to liquefy. There are also certain disadvantages in the propargyl alcohol fractionation method. During the distillation process, the gaseous propargyl alcohol at the air inlet of the cooling tube is liquefied, and the propargyl alcohol needs to be heated and vaporized again. Summary of the invention

[0003] The object of the present invention is to provide a fractionation device and a fractionation method for producing propargyl alcohol, so as to solve the problems raised in the above background technology.

[0004] The purpose of the present invention can be achieved by the following technical solutions: A fractionation device for producing propargyl alcohol comprises a fractionation reaction tower shell, a cooling pipe and a collecting tank, wherein the cooling pipe is connected to the top of the fractionation reaction tower shell, and the cooling pipe is connected to the collecting tank. A collecting structure is arranged at the upper end of the inner wall of the fractionation reaction tower shell, and the collecting structure comprises a collecting bucket and a fixed bottom plate, and the collecting bucket and the fixed bottom plate are welded to each other, and the edge of the collecting bucket is welded to the inner wall of the fractionation reaction tower shell. A fixing hole is arranged on the side wall of the collecting bucket, and a ventilating column is welded inside the fixing hole. A ventilating hole is arranged on the surface of the fixed bottom plate, and the ventilating column and the ventilating hole are used for passing rising steam. The fixed bottom plate is used for collecting propargyl alcohol condensed at the air inlet of the cooling pipe. A plurality of coils of heating wires are embedded and installed inside the collecting bucket, and the heating wires are used for heating the cooled propargyl alcohol again.

[0005] As a preferred technical solution of the present invention, the outer shape of the collecting bucket is in the shape of "round sky and square earth", the shape of the air-permeable column is in the shape of a truncated cone, and the shape of the heating wire is the same as the cross-sectional shape of the collecting bucket.

[0006] As a preferred technical solution of the present invention, a scraping structure is provided on the upper surface and the lower surface of the fixed base plate, and the scraping structure includes a first fixed frame and a second fixed frame, the first fixed frame is welded to the upper surface of the fixed base plate, two edge inner walls of the first fixed frame are provided with a first sliding groove, the shape of the first sliding groove is L-shaped, the second fixed frame is welded to the lower surface of the fixed base plate, two edge inner walls of the second fixed frame are provided with a second sliding groove, the shape of the second sliding groove is L-shaped, the first sliding block and the second sliding block are provided inside the first sliding groove, and the first sliding block and the second sliding block are also provided inside the second sliding groove, a first fixed plate is provided between the first sliding block and the second sliding block of the first sliding groove, a second fixed plate is provided between the first sliding block and the second sliding block of the second sliding groove, a row of scraping plates are provided inside the first fixed plate and inside the second fixed plate, the scraping plates are arranged obliquely inside the first fixed plate and the second fixed plate, and a driving structure is provided between the second sliding block of the first fixed plate and the second sliding block of the second fixed plate.

[0007] As a preferred technical solution of the present invention, connecting rods are provided inside the first sliding block and the second sliding block, and the two edges of the first fixed plate and the two edges of the second fixed plate are rotatably connected to the connecting rods, the first sliding block of the first fixed plate is slidably connected along the inside of the first sliding groove, the first sliding block of the second fixed plate is slidably connected along the inside of the second sliding groove, the second sliding block of the first fixed plate moves horizontally along the first sliding groove, the second sliding block of the second fixed plate moves horizontally along the second sliding groove, and the second sliding block of the first sliding groove and the second sliding block of the second sliding groove approach or move away from each other.

[0008] As a preferred technical solution of the present invention, the first fixed plate is arranged obliquely inside the first fixed frame, the second fixed plate is arranged obliquely inside the second fixed frame, and the scraper plate on the edge of the first fixed plate and the scraper plate on the edge of the second fixed plate are both in contact with the surface of the fixed bottom plate.

[0009] As a preferred technical solution of the present invention, the first fixed plate is horizontally arranged inside the first fixed frame, the second fixed plate is horizontally arranged inside the second fixed frame, and each scraper plate of the first fixed plate and each scraper plate of the second fixed plate are in contact with the surface of the fixed bottom plate.

[0010] As a preferred technical solution of the present invention, the driving structure includes a rotating shaft, which is arranged in the middle of the first fixed frame and the second fixed frame, and both ends of the rotating shaft are rotatably connected with the first fixed frame and the second fixed frame, and the cylindrical surface of the rotating shaft is provided with rotating blades and gears, and the rotating blades and the gears rotate synchronously, and the first rack is provided at the end of the second sliding block of the first fixed plate, and the second rack is provided at the end of the second sliding block of the second fixed plate, and the first rack and the second rack are both meshed with the gear.

[0011] As a preferred technical solution of the present invention, connecting blocks are provided between the second sliding block at the end of the first rack and the first rack, and between the second sliding block at the end of the second rack and the second rack, and the gap height of the connecting blocks is greater than the blade height of the rotating fan blade.

[0012] A fractionation method for the production of propargyl alcohol comprises the following steps: S1. Preparation: ensure that the fractionation equipment is clean and in good condition, and prepare laboratory instruments and tools; S2, during the fractionation process, the crude propargyl alcohol product is added to the fractionation reaction tower, and the addition speed is controlled to avoid the generation of foam; S3, start heating the fractionation reaction tower, gradually increase the temperature until the boiling point of propargyl alcohol is reached, observe the changes in temperature and pressure in the fractionation reaction tower, adjust the heating power, and keep the temperature and pressure within a suitable range; S4. When the air inlet temperature of the cooling tube reaches the boiling point of propargyl alcohol, the propargyl alcohol begins to evaporate, and is condensed by the cooling tube and collected in the collection tank; S5. During the collection process, pay attention to the liquid in the receiver. When the color and transparency of the liquid change, it means that propargyl alcohol has been separated. S6, using the collecting structure to collect the liquid at the air inlet of the cooling pipe, and the heating wire to heat the collected liquefied propargyl alcohol again to reduce the liquefaction of the propargyl alcohol gas at the air inlet of the cooling pipe; S7, continue fractionation, collect the residual liquid at the bottom of the fractionation reaction tower, this part of the residual liquid contains the by-product of propargyl alcohol and unreacted raw materials; S8, ending the fractionation. When the liquid in the shell of the fractionation reaction tower is completely separated, the heater is turned off, the heating is stopped, and the shell of the fractionation reaction tower is allowed to cool naturally to room temperature, and then the collected propargyl alcohol is taken out; S9, post-processing, post-processing the collected propargyl alcohol to obtain a high-purity propargyl alcohol product.

[0013] As a preferred technical solution of the present invention, the temperature at the air inlet of the cooling pipes of S4 and S6 is greater than the boiling point of propargyl alcohol to ensure that the purity of the collected propargyl alcohol meets the requirements, and the post-treatment of the propargyl alcohol in S9 includes dehydration and drying, and then filtering to obtain the final pure propargyl alcohol product.

[0014] Compared with the prior art, the present invention has the following beneficial effects: A collecting structure is provided to collect the liquefied propargyl alcohol through a collecting hopper and a fixed bottom plate, and the collected liquid is heated again by a heating wire to avoid the lower temperature at the air inlet of the cooling pipe causing more propargyl alcohol gas to liquefy, thereby ensuring that less gas is liquefied at the air inlet of the cooling pipe, and improving the efficiency of propargyl alcohol conversion; A scraping structure is provided, and the air holes of the fixed bottom plate can be blocked by the first fixed plate and the second fixed plate to reduce the airflow passing through the fixed bottom plate, and the liquid on the upper and lower surfaces of the fixed bottom plate can be scraped by the first fixed plate and the second fixed plate arranged horizontally, thereby reducing the accumulation of liquefied propargyl alcohol on the fixed bottom plate and discharging the liquid on the fixed bottom plate in time; By using the collection structure and the scraping structure in combination, the propargyl alcohol liquid accumulated on the surface of the fixed bottom plate is scraped off, so that less propargyl alcohol liquid can be heated by the heating wire more conveniently, and the efficiency of propargyl alcohol conversion can also be improved; A driving structure is provided to drive the rotating fan blades by using steam, so that the gear and the two racks are meshed, which can provide power for the movement of the first fixed plate and the second fixed plate, and can make full use of the steam in the shell of the fractionation reaction tower; The liquid at the air inlet of the cooling tube is collected by the collecting structure, and the collected liquefied propargyl alcohol is heated again by the heating wire, so as to reduce the liquefaction of the propargyl alcohol gas at the air inlet of the cooling tube and improve the efficiency of the preparation of propargyl alcohol. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0016] Figure 1 It is the main structure diagram of the present invention; Figure 2 It is a schematic diagram of the interior of the shell of the fractionation reaction tower of the present invention; Figure 3 It is a schematic diagram of the collection structure of the present invention; Figure 4 It is a schematic diagram of a fixed base plate of the present invention; Figure 5 It is a schematic diagram of the interior of the air-permeable column of the present invention; Figure 6 It is a schematic diagram of the inclined state of the first fixing plate and the scraping plate of the present invention; Figure 7 It is a schematic diagram of the horizontal state of the first fixing plate and the second fixing plate of the present invention; Figure 8 It is a schematic diagram of the driving structure of the present invention; Fig. 9 A schematic diagram of the connection between the connecting block and the second sliding block of the present invention; Fig.10 It is a schematic diagram of the position of the connecting block and the rotating fan blades of the present invention.

[0017] In the figure: 1. distillation reaction tower shell; 2. cooling pipe; 3. collecting tank; 4. collecting structure; 41. collecting bucket; 42. fixed bottom plate; 43. fixing hole; 44. air-permeable column; 45. air-permeable hole; 46. heating wire; 5. scraping structure; 51. first fixed frame; 52. second fixed frame; 53. first fixed plate; 54. second fixed plate; 55. scraping plate; 56. first sliding block; 57. second sliding block; 58. connecting rod; 59. first sliding groove; 510. second sliding groove; 6. driving structure; 61. rotating blade; 62. gear; 63. first rack; 64. connecting block; 65. second rack; 66. rotating shaft. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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. Example

[0019] See also Figure 1-Figure 5As shown, a fractionation device for the production of propargyl alcohol comprises a fractionation reaction tower shell 1, a cooling pipe 2 and a collecting tank 3, wherein the cooling pipe 2 is connected to the top of the fractionation reaction tower shell 1, and the cooling pipe 2 is connected to the collecting tank 3, a filtrate containing a propargyl alcohol solution is put into the fractionation reaction tower shell 1, and then the solution inside the fractionation reaction tower shell 1 is heated, so that the multiple solutions in the fractionation reaction tower shell 1 are heated and evaporated, and since the substances in the solutions have different boiling points, the substances with a relatively low boiling point are evaporated first and discharged from the cooling pipe 2, and then liquefied by being cooled in the cooling pipe 2 until entering the collecting tank 3, and the substances with a relatively low boiling point are retained in the fractionation reaction tower shell 1, and the propargyl alcohol is distilled into the collecting tank 3 according to the solution in the preparation of propargyl alcohol, and a collecting structure 4 is arranged on the upper end of the inner wall of the fractionation reaction tower shell 1, and the collecting structure 4 comprises a collecting bucket 41 and a fixed bottom plate 42, and the collecting bucket 41 and the fixed bottom plate 42 are welded to each other, and the edge of the collecting bucket 41 is connected to the fractionation reaction The inner wall of the tower shell 1 is welded, and the collecting hopper 41 and the fixed bottom plate 42 are welded to the inner top of the fractionation reaction tower shell 1, and the propargyl alcohol just liquefied at the inlet of the cooling tube 2 is refluxed to the collecting hopper 41 and the fixed bottom plate 42. The side wall of the collecting hopper 41 is provided with a fixed hole 43, and a vent column 44 is welded inside the fixed hole 43. The surface of the fixed bottom plate 42 is provided with a vent hole 45, and the vent column 44 and the vent hole 45 are used to pass the rising steam, and the fixed bottom plate 42 is used to collect the air inlet of the cooling tube 2. The propargyl alcohol condensed at the collecting hopper 41 has a plurality of circles of heating wires 46 embedded inside, and the heating wires 46 are used to heat the cooled propargyl alcohol again. The propargyl alcohol gas overflows from the air permeable column 44 and the air permeable hole 45, so that a part of the liquefied propargyl alcohol liquid flows back to the collecting hopper 41 and the fixed bottom plate 42, and the propargyl alcohol gas is passed to the cooling pipe 2, so that the propargyl alcohol gas is liquefied and flows into the collecting tank 3. The heating wires 46 in the collecting hopper 41 can also heat the liquefied propargyl alcohol again.

[0020] See also Figure 3 and Figure 4 As shown, the collecting hopper 41 has an outer shape of "round sky and square earth", the air permeable column 44 is truncated cone-shaped, and the shape of the heating wire 46 is the same as the cross-sectional shape of the collecting hopper 41. The "round sky and square earth" collecting hopper 41 can return the liquefied propargyl alcohol liquid to the fixed bottom plate 42, which can not only flow to the bottom end of the distillation reaction tower shell 1 again and be heated again, but also partially liquefied propargyl alcohol can be heated again through the heating wire 46 of the collecting hopper 41.

[0021] See also Figure 2 and Figure 6As shown, the upper and lower surfaces of the fixed bottom plate 42 are provided with a scraping structure 5, and the scraping structure 5 includes a first fixed frame 51 and a second fixed frame 52. The first fixed frame 51 is welded to the upper surface of the fixed bottom plate 42, and the inner walls of the two edges of the first fixed frame 51 are provided with first sliding grooves 59, and the shape of the first sliding groove 59 is L-shaped, and the cross-sectional shape of the first sliding groove 59 is T-shaped, and the corner of the first sliding groove 59 is arc-shaped, and the second fixed frame 52 is welded to the lower surface of the fixed bottom plate 42, and the inner walls of the two edges of the second fixed frame 52 are provided with second sliding grooves 510, and the second sliding grooves 51 0 is L-shaped, the cross-sectional shape of the second sliding groove 510 is T-shaped, and the corner of the second sliding groove 510 is arc-shaped, the first sliding block 56 and the second sliding block 57 are arranged inside the first sliding groove 59, and the cross-sectional shape of the first sliding block 56 and the second sliding block 57 is adapted to the T-shaped shape of the first sliding groove 59, and the first sliding block 56 and the second sliding block 57 are also arranged inside the second sliding groove 510, and the cross-sectional shape of the first sliding block 56 and the second sliding block 57 is adapted to the T-shaped shape of the second sliding groove 510, and the first sliding block 56 and the second sliding block 57 of the first sliding groove 59 are adapted to the T-shaped shape of the second sliding groove 510. A first fixed plate 53 is arranged between the first sliding block 56 and the second sliding block 57 of the second sliding groove 510, and a second fixed plate 54 is arranged between the first sliding block 56 and the second sliding block 57 of the first fixed plate 53. The first sliding block 56 and the second sliding block 57 of the first fixed plate 53 can move along the inside of the first sliding groove 59, and the first sliding block 56 and the second sliding block 57 of the second fixed plate 54 can move along the inside of the second sliding groove 510. A row of scraping plates 55 are arranged inside the first fixed plate 53 and the second fixed plate 54. The scraping plates 55 are arranged obliquely inside the first fixed plate 53 and the second fixed plate 54. The scraping plates 55 of the first fixed plate 53 The liquid on the upper surface of the fixed bottom plate 42 can be pushed, and the scraper plate 55 of the second fixed plate 54 can push the liquid on the lower surface of the fixed bottom plate 42, thereby pushing the liquid on the upper and lower surfaces of the fixed bottom plate 42, thereby preventing the liquid on the fixed bottom plate 42 from affecting the temperature of the propargyl alcohol gas. A driving structure 6 is provided between the second sliding block 57 of the first fixed plate 53 and the second sliding block 57 of the second fixed plate 54. The driving structure 6 is used to drive the first fixed plate 53 and the second fixed plate 54, thereby driving the first fixed plate 53 and the second fixed plate 54 on the fixed bottom plate 42.

[0022] See also Figure 6 and Figure 7As shown, connecting rods 58 are provided inside the first sliding block 56 and the second sliding block 57, and the two edges of the first fixed plate 53 and the two edges of the second fixed plate 54 are rotatably connected to the connecting rods 58. When the positions of the first fixed plate 53 and the second fixed plate 54 change, the connecting rods 58 can be used to rotate. The first sliding block 56 of the first fixed plate 53 is slidably connected along the inside of the first sliding groove 59, and the first sliding block 56 of the second fixed plate 54 is slidably connected along the inside of the second sliding groove 510. The first sliding block 56 and the second sliding block 57 of the first fixed plate 53 can operate normally, and the first sliding block 56 and the second sliding block 57 of the second fixed plate 54 can operate normally. The second sliding block 57 of the first fixed plate 53 moves horizontally along the first sliding groove 59, and the second sliding block 57 of the second fixed plate 54 moves horizontally along the second sliding groove 510. The second sliding block 57 of the first sliding groove 59 and the second sliding block 57 of the second sliding groove 510 are close to or away from each other, and the position angle of the first fixed plate 53 and the second fixed plate 54 can change.

[0023] See also Figure 6 As shown, the first fixed plate 53 is arranged obliquely inside the first fixed frame 51, and the second fixed plate 54 is arranged obliquely inside the second fixed frame 52. The scraper plates 55 at the edge of the first fixed plate 53 and the scraper plates 55 at the edge of the second fixed plate 54 are both in contact with the surface of the fixed bottom plate 42. The second sliding block 57 of the first fixed plate 53 and the second sliding block 57 of the second fixed plate 54 can be adjusted by using the driving structure 6, so that the first fixed plate 53 and the second fixed plate 54 are in an inclined state. Since the scraper plates 55 of the first fixed plate 53 and the scraper plates 55 of the second fixed plate 54 are arranged obliquely, the scraper plates 55 at the edge can contact the fixed bottom plate 42. The material of the scraper plates 55 can be a hard plastic material, and the boiling point of the material is much greater than the heating temperature inside the distillation reaction tower shell 1. The scraper plates 55 can be slightly deformed when in contact with the fixed bottom plate 42, so that the scraper plates 55 are always in contact with the upper and lower surfaces of the fixed bottom plate 42.

[0024] See also Figure 7As shown, the first fixed plate 53 is horizontally arranged inside the first fixed frame 51, and the second fixed plate 54 is horizontally arranged inside the second fixed frame 52. The driving structure 6 is used to move the first fixed plate 53 and the second fixed plate 54 to the fixed bottom plate 42, so that the fixed bottom plate 42 is parallel to the first fixed plate 53 and the second fixed plate 54. Each scraper plate 55 of the first fixed plate 53 and each scraper plate 55 of the second fixed plate 54 are in contact with the surface of the fixed bottom plate 42. Although there are slight differences in the scrapers 55 of the same group, the scrapers 55 can be slightly deformed, so that the scrapers 55 of the first fixed plate 53 and the scrapers 55 of the second fixed plate 54 can all be in contact with the upper and lower surfaces of the fixed bottom plate 42, so that the scrapers 55 of the first fixed plate 53 and the scrapers 55 of the second fixed plate 54 can remove the liquid on the upper and lower surfaces of the fixed bottom plate 42 to avoid liquefaction of steam at the air inlet of the cooling pipe 2 due to excessive liquid.

[0025] See also Figure 2 , Figure 6 , Figure 8 and Fig. 9 As shown, the driving structure 6 includes a rotating shaft 66, and the rotating shaft 66 is arranged in the middle of the first fixed frame 51 and the second fixed frame 52. Both ends of the rotating shaft 66 are rotatably connected with the first fixed frame 51 and the second fixed frame 52. The first fixed frame 51 and the second fixed frame 52 can support the rotating shaft 66 and ensure that the rotating shaft 66 can rotate normally. The cylindrical surface of the rotating shaft 66 is provided with a rotating blade 61 and a gear 62. The rotating blade 61 can rotate the gear 62 under the action of the steam airflow, and the rotating blade 61 and the gear 62 rotate synchronously. The end of the second sliding block 57 of the first fixed plate 53 is provided with a first rack 63, and the end of the second sliding block 57 of the second fixed plate 54 is provided with a second rack 65. The first rack 6 3 and the second rack 65 are both meshed with the gear 62. The rotation of the gear 62 can drive the first rack 63 and the second rack 65 to mesh, so that the first rack 63 and the second rack 65 can move in the horizontal direction. At this time, the first rack 63 and the second rack 65 can move the second sliding block 57 of the first fixed plate 53 and the second sliding block 57 of the second fixed plate 54 closer to or farther away from each other, thereby changing the state of the first fixed plate 53 and the second fixed plate 54. After the internal temperature of the fractionation reaction tower shell 1 is reduced, the first fixed plate 53 and the second fixed plate 54 are manually reset, or the first sliding block 56 can be moved by pulling the pull rope obliquely upward, so that the first fixed plate 53 and the second fixed plate 54 are in a vertical state.

[0026] See also Figure 8-Figure 10As shown, connecting blocks 64 are provided between the second sliding block 57 at the end of the first rack 63 and the first rack 63, and between the second sliding block 57 at the end of the second rack 65 and the second rack 65, and the gap height of the connecting block 64 is greater than the blade height of the rotating fan blade 61. The connecting block 64 can ensure that the first rack 63 and the second rack 65 will not interfere with each other when they are close to the gear 62 or the rotating fan blade 61.

[0027] A fractionation method for the production of propargyl alcohol comprises the following steps: S1. Preparation: ensure that the fractionation equipment is clean and in good condition, and prepare laboratory instruments and tools; S2, during the fractionation process, the crude propargyl alcohol product is added to the fractionation reaction tower, and the addition speed is controlled to avoid the generation of foam; S3, start heating the fractionation reaction tower, gradually increase the temperature until the boiling point of propargyl alcohol is reached, observe the changes in temperature and pressure in the fractionation reaction tower, adjust the heating power, and keep the temperature and pressure within a suitable range; S4, when the air inlet temperature of the cooling tube 2 reaches the boiling point of propargyl alcohol, the propargyl alcohol begins to evaporate, and is condensed by the cooling tube 2 and collected in the collecting tank 3; S5. During the collection process, pay attention to the liquid in the receiver. When the color and transparency of the liquid change, it means that propargyl alcohol has been separated. S6, using the collecting structure 4 to collect the liquid at the air inlet of the cooling tube 2, and the heating wire 46 to heat the collected liquefied propargyl alcohol again to reduce the liquefaction of the propargyl alcohol gas at the air inlet of the cooling tube 2; S7, continue fractionation, collect the residual liquid at the bottom of the fractionation reaction tower, this part of the residual liquid contains the by-product of propargyl alcohol and unreacted raw materials; S8, ending fractionation, when the liquid in the fractionation reaction tower shell 1 is completely separated, turning off the heater, stopping heating, allowing the fractionation reaction tower shell 1 to cool naturally to room temperature, and then taking out the collected propargyl alcohol; S9, post-processing, post-processing the collected propargyl alcohol to obtain a high-purity propargyl alcohol product.

[0028] The temperature at the air inlet of the cooling pipe 2 of S4 and S6 is greater than the boiling point of propargyl alcohol to ensure that the purity of the collected propargyl alcohol meets the requirements. The post-treatment of the propargyl alcohol in S9 includes dehydration and drying, and then filtering to obtain the final pure propargyl alcohol product.

[0029] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. 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. A fractionation device for producing propargyl alcohol, comprising a fractionation reaction tower shell (1), a cooling pipe (2) and a collecting tank (3), wherein the cooling pipe (2) is connected to the top of the fractionation reaction tower shell (1), and the cooling pipe (2) is connected to the collecting tank (3), characterized in that: A collecting structure (4) is provided at the upper end of the inner wall of the fractionation reaction tower shell (1), the collecting structure (4) comprising a collecting bucket (41) and a fixed bottom plate (42), the collecting bucket (41) and the fixed bottom plate (42) being welded to each other, and the edge of the collecting bucket (41) is welded to the inner wall of the fractionation reaction tower shell (1), the side wall of the collecting bucket (41) is provided with a fixing hole (43), the interior of the fixing hole (43) is welded with a venting column (44), the surface of the fixed bottom plate (42) is provided with a venting hole (45), the venting column (44) and the venting hole (45) are used to pass rising steam, the fixed bottom plate (42) is used to collect propargyl alcohol condensed at the air inlet of the cooling pipe (2), and a plurality of coils of heating wires (46) are embedded and installed inside the collecting bucket (41), the heating wires (46) are used to heat the cooled propargyl alcohol again.

2. A fractionation device for producing propargyl alcohol according to claim 1, characterized in that: The outer shape of the collecting hopper (41) is in the shape of a "round sky and square earth", the shape of the air permeable column (44) is in the shape of a truncated cone, and the shape of the heating wire (46) is the same as the cross-sectional shape of the collecting hopper (41).

3. A fractionation device for producing propargyl alcohol according to claim 2, characterized in that: The upper surface and the lower surface of the fixed bottom plate (42) are provided with a scraping structure (5), and the scraping structure (5) comprises a first fixed frame (51) and a second fixed frame (52), the first fixed frame (51) is welded to the upper surface of the fixed bottom plate (42), two edge inner walls of the first fixed frame (51) are provided with first sliding grooves (59), and the shape of the first sliding grooves (59) is L-shaped, the second fixed frame (52) is welded to the lower surface of the fixed bottom plate (42), two edge inner walls of the second fixed frame (52) are provided with second sliding grooves (510), and the shape of the second sliding grooves (510) is L-shaped, the first sliding groove (59) is provided with a first sliding block (56) and a second sliding block (57), and the second sliding groove (5 10) is also provided with a first sliding block (56) and a second sliding block (57), a first fixed plate (53) is provided between the first sliding block (56) and the second sliding block (57) of the first sliding groove (59), a second fixed plate (54) is provided between the first sliding block (56) and the second sliding block (57) of the second sliding groove (510), a row of scraping plates (55) are provided inside the first fixed plate (53) and inside the second fixed plate (54), the scraping plates (55) are arranged obliquely inside the first fixed plate (53) and the second fixed plate (54), and a driving structure (6) is provided between the second sliding block (57) of the first fixed plate (53) and the second sliding block (57) of the second fixed plate (54).

4. A fractionation device for the production of propargyl alcohol according to claim 3, characterized in that: A connecting rod (58) is provided inside the first sliding block (56) and the second sliding block (57), and two edges of the first fixed plate (53) and two edges of the second fixed plate (54) are rotatably connected to the connecting rod (58); the first sliding block (56) of the first fixed plate (53) is slidably connected along the inside of the first sliding groove (59); the first sliding block (56) of the second fixed plate (54) is slidably connected along the inside of the second sliding groove (510); the second sliding block (57) of the first fixed plate (53) moves horizontally along the first sliding groove (59); the second sliding block (57) of the second fixed plate (54) moves horizontally along the second sliding groove (510); the second sliding block (57) of the first sliding groove (59) and the second sliding block (57) of the second sliding groove (510) move closer to or farther from each other.

5. A fractionation device for the production of propargyl alcohol according to claim 4, characterized in that: The first fixing plate (53) is arranged obliquely inside the first fixing frame (51), the second fixing plate (54) is arranged obliquely inside the second fixing frame (52), and the scraping plate (55) at the edge of the first fixing plate (53) and the scraping plate (55) at the edge of the second fixing plate (54) are both in contact with the surface of the fixing bottom plate (42).

6. A fractionation device for producing propargyl alcohol according to claim 4, characterized in that: The first fixing plate (53) is horizontally arranged inside the first fixing frame (51), the second fixing plate (54) is horizontally arranged inside the second fixing frame (52), and each scraper plate (55) of the first fixing plate (53) and each scraper plate (55) of the second fixing plate (54) are in contact with the surface of the fixing bottom plate (42).

7. A fractionation device for producing propargyl alcohol according to claim 4, characterized in that: The driving structure (6) comprises a rotating shaft (66), wherein the rotating shaft (66) is arranged in the middle of the first fixed frame (51) and the second fixed frame (52), and the two ends of the rotating shaft (66) are rotatably connected to the first fixed frame (51) and the second fixed frame (52). The cylindrical surface of the rotating shaft (66) is provided with rotating blades (61) and gears (62), and the rotating blades (61) and the gears (62) rotate synchronously. The end of the second sliding block (57) of the first fixed plate (53) is provided with a first rack (63), and the end of the second sliding block (57) of the second fixed plate (54) is provided with a second rack (65), and the first rack (63) and the second rack (65) are both meshed with the gear (62).

8. A fractionation device for producing propargyl alcohol according to claim 7, characterized in that: A connecting block (64) is provided between the second sliding block (57) at the end of the first rack (63) and the first rack (63), and between the second sliding block (57) at the end of the second rack (65) and the second rack (65), and a gap height of the connecting block (64) is greater than a blade height of the rotating blade (61).

9. A fractionation method for producing propargyl alcohol, comprising performing fractionation by using a fractionation device for producing propargyl alcohol according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Preparation: ensure that the fractionation equipment is clean and in good condition, and prepare laboratory instruments and tools; S2, during the fractionation process, the crude propargyl alcohol product is added to the fractionation reaction tower, and the addition speed is controlled to avoid the generation of foam; S3, start heating the fractionation reaction tower, gradually increase the temperature until the boiling point of propargyl alcohol is reached, observe the changes in temperature and pressure in the fractionation reaction tower, adjust the heating power, and keep the temperature and pressure within a suitable range; S4. When the air inlet temperature of the cooling tube (2) reaches the boiling point of propargyl alcohol, the propargyl alcohol begins to evaporate, is condensed through the cooling tube (2), and is collected in the collection tank (3); S5. During the collection process, pay attention to the liquid in the receiver. When the color and transparency of the liquid change, it means that propargyl alcohol has been separated. S6, using the collecting structure (4) to collect the liquid at the air inlet of the cooling tube (2), and using the heating wire (46) to heat the collected liquefied propargyl alcohol again, thereby reducing the liquefaction of the propargyl alcohol gas at the air inlet of the cooling tube (2); S7, continue fractionation, collect the residual liquid at the bottom of the fractionation reaction tower, this part of the residual liquid contains the by-product of propargyl alcohol and unreacted raw materials; S8, ending the fractionation. When the liquid in the fractionation reaction tower shell (1) is completely separated, the heater is turned off to stop heating, and the fractionation reaction tower shell (1) is allowed to cool naturally to room temperature, and then the collected propargyl alcohol is taken out; S9, post-processing, post-processing the collected propargyl alcohol to obtain a high-purity propargyl alcohol product.

10. A fractionation method for producing propargyl alcohol according to claim 9, characterized in that: The temperature at the air inlet of the cooling pipe (2) of S4 and S6 is greater than the boiling point of propargyl alcohol to ensure that the purity of the collected propargyl alcohol meets the requirements. The post-treatment of the propargyl alcohol in S9 includes dehydration and drying, and then filtering to obtain the final pure propargyl alcohol product.

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