A catalytic reaction distillation tower and a distillation process for preparing 1,3-dioxolane

Abstract

The invention discloses a catalytic reaction distillation tower and a distillation process for preparing 1,3-dioxolane, and relates to the field of distillation towers, including a distillation tower and a catalytic module, wherein the catalytic module includes a catalytic shell and a fixed shell, the catalytic shell can rotate in the fixed shell, a plurality of catalytic components are connected to the catalytic shell, and the plurality of catalytic components are arranged concentrically in a circle, the catalytic component also includes a catalytic tube and two catalytic covers, the two catalytic covers are respectively threadedly connected to the two ends of the catalytic tube, and the catalytic cover is provided with catalytic holes, and the catalytic module also includes two groups of adjustment components. By replacing the catalytic particles in a catalytic tube individually each time, it is ensured that the catalytic particles in the catalytic tube have good catalytic efficiency, and during the replacement process, the other catalytic tubes can still perform catalytic reactions, reducing the downtime due to replacing the catalytic particles and cleaning the catalytic tubes, and the catalytic particles of the catalytic tubes in the inner circle of the catalytic shell can be replaced, and the replacement range is large and the adaptability is stronger.

Description

Technical Field

[0001] The invention relates to the field of distillation towers, and in particular to a catalytic reaction distillation tower and a distillation process for preparing 1,3-dioxolane. Background Art

[0002] A distillation tower is a device used for chemical separation. It mainly uses the difference in volatility of each component in the mixture to separate the components through countercurrent contact and phase transfer between the gas and liquid phases. A distillation tower is a tower-type vapor-liquid contact device, which is widely used in petrochemical, chemical pharmaceutical, food processing and other fields. Its working principle is that the mixture is heated to partial vaporization at the bottom of the tower to form rising steam. During the rising process of the steam in the tower, it exchanges heat and mass with the descending liquid, so that the light components (low boiling substances) are gradually enriched in the gas phase and rise to the top of the tower, while the heavy components (high boiling substances) are condensed and refluxed to the bottom of the tower, thereby achieving the separation of components. Existing distillation towers often have catalytic functions and are used to separate substances in catalytic reactions.

[0003] A catalytic fixed bed is a stationary solid particle bed formed by filling catalyst particles in a tubular reactor. The fluid reaction materials flow through the gaps between the catalyst particles and undergo chemical reactions on the catalyst surface. The chemical fixed bed is mainly divided into adiabatic reactors and non-adiabatic reactors. Adiabatic reactors do not exchange any heat with the outside world. For exothermic reactions, the heat released during the reaction is completely used to heat the materials in the system; if it is an endothermic reaction, the system temperature will decrease. Non-adiabatic reactors are further divided into external heat exchange and self-heating types. In reactions with large reaction heat, shell-and-tube reactors are widely used. Their characteristic is that heat exchange is carried out in the reaction zone, similar to shell-and-tube heat exchangers. Catalysts are filled in the tubes, and heat-carrying fluids flow between the shells.

[0004] The prior art also has the following defects: after long-term use, the catalytic particles in the catalytic tube are prone to accumulate impurities and reduce energy efficiency, and need to be replaced and cleaned. During the replacement and cleaning process, the machine needs to be shut down and the outer shell removed, which is cumbersome, time-consuming and labor-intensive to operate, and the downtime is long, affecting the catalytic efficiency.

[0005] Therefore, the present application provides a catalytic reaction distillation tower and a distillation process for preparing 1,3-dioxolane to meet the needs. Summary of the invention

[0006] The purpose of the present application is to provide a catalytic reaction distillation tower and a distillation process for the preparation of 1,3-dioxolane. By replacing the catalytic particles in one catalytic tube individually each time, it is ensured that the catalytic particles in the catalytic tube have good catalytic efficiency. During the replacement process, the other catalytic tubes can still carry out catalytic reactions, reducing the downtime due to replacing the catalytic particles and cleaning the catalytic tubes. The catalytic particles can be replaced in the catalytic tubes of the inner circle of the catalytic shell, with a wide replacement range and stronger adaptability.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a catalytic reaction distillation tower, comprising a distillation tower and a catalytic module, the catalytic module comprising a catalytic shell and a fixed shell, the catalytic shell being able to rotate in the fixed shell, a plurality of catalytic components being connected to the catalytic shell, and the plurality of catalytic components being arranged concentrically in a circle; the catalytic component also comprises a catalytic tube and two catalytic covers, the two catalytic covers being respectively threadedly connected to the two ends of the catalytic tube, and the catalytic covers being provided with catalytic holes; the catalytic module also comprises two groups of adjustment components, the two groups of adjustment components being respectively arranged at the top and bottom of the catalytic shell, the adjustment component comprising a driving unit and a plurality of adjustment units, the driving unit being able to drive the plurality of adjustment units to move toward the axial direction of the catalytic shell, and being located at the top of the catalytic shell Several of the adjustment units are respectively connected to a screw cap assembly, a cleaning assembly and a filling assembly, and several of the adjustment units located at the bottom of the catalytic shell are respectively connected to a discharge assembly, a screw cap assembly and a liquid discharge assembly; the screw cap assembly can disassemble the catalytic cover at the end of the catalytic tube; the cleaning assembly includes a cleaning tube and a cleaning brush, the cleaning brush is fixedly mounted on the cleaning tube, the cleaning tube can move vertically and rotate, and several cleaning holes are equidistantly opened on the cleaning tube, and cleaning liquid can be sprayed out through the cleaning holes; the filling assembly can pass the catalytic material into the catalytic tube; the liquid discharge assembly corresponds to the cleaning assembly, and can discharge the cleaning liquid in the catalytic tube; the discharge assembly corresponds to the screw cap assembly, and the discharge assembly can discharge the catalytic material in the catalytic tube.

[0008] Preferably, the driving unit includes a driving motor, a driving gear and a driving ring gear, the driving motor is fixedly mounted on the fixed shell, the driving gear is fixedly mounted on the output end of the driving motor, and the driving ring gear is meshed with the driving gear, the adjustment unit includes an adjusting gear, an adjusting screw, a moving block and a limiting rod, the adjusting gear is fixedly mounted on the adjusting screw, the moving block is sleeved on the adjusting screw and threadedly connected to the adjusting screw, the moving block is sleeved on the limiting rod and slidably cooperates with the limiting rod, and the adjustment gear is meshed with the driving ring gear.

[0009] Preferably, the cleaning component includes a movable screw, a movable motor, a movable plate, a cleaning motor, a cleaning belt component and a cleaning hose, the movable screw being rotatably connected to the catalytic shell, the movable motor being fixedly mounted on the fixed shell, the movable screw being fixedly mounted on the output end of the movable motor, the adjustment component located at the top of the catalytic shell being arranged on the movable plate, the movable plate being sleeved on the movable screw and being threadedly connected to the movable screw, the cleaning motor being fixedly mounted on the corresponding moving block, the cleaning pipe being rotatably connected to the corresponding moving block, the cleaning belt component including a cleaning active pulley, a cleaning passive pulley and a cleaning belt, the cleaning active pulley being fixedly mounted on the output end of the cleaning motor, the cleaning passive pulley being fixedly mounted on the cleaning pipe, the cleaning belt being connected to the cleaning active pulley and the cleaning passive pulley, one end of the cleaning hose being rotatably connected to the cleaning pipe and being communicated with the cleaning pipe, and the cleaning hose passing through the fixed shell and being communicated with an external water source.

[0010] Preferably, the rotary cover assembly comprises a rectangular rod, a rotary cover shell, a rotary cover motor, a rotary cover belt, a rectangular sleeve and a rotary cover cylinder, the rotary cover motor is fixedly mounted on the corresponding moving block, the rectangular sleeve is rotatably connected to the corresponding moving block, a rectangular groove is opened on the rectangular sleeve, the rectangular rod is arranged in the rectangular groove and slidably cooperates with the rectangular sleeve, the rotary cover cylinder is fixedly mounted on the fixed shell, the rectangular rod is rotatably connected to the output end of the rotary cover cylinder, the rotary cover belt comprises a rotary cover active pulley, a rotary cover passive pulley and a rotary cover belt, the rotary cover active pulley is fixedly mounted on the output end of the rotary cover motor, the rotary cover passive pulley is fixedly mounted on the rectangular sleeve, the rotary cover belt is connected to the rotary cover active pulley and the rotary cover passive pulley, the rotary cover shell is fixedly mounted on the rectangular rod, a rotary cover tooth is fixedly mounted in the rotary cover shell, a catalytic cover tooth is fixedly mounted on the catalytic cover, and an extrusion rubber ring is fixedly mounted in the rotary cover shell.

[0011] Preferably, the filling assembly includes a filling tube, a filling cylinder and a filling hose, the filling tube passes through the corresponding moving block and slides with the moving block, the filling cylinder is fixedly mounted on the fixed shell, the filling tube is fixedly mounted on the output end of the filling cylinder, the filling hose is fixedly mounted on the top of the filling tube and is connected to the filling tube, and the filling hose passes through the fixed shell and is connected to an external silo.

[0012] Preferably, the adjustment assembly located at the bottom of the catalytic shell is installed on the fixed shell, the discharge assembly includes a discharge shell and a discharge hose, the rectangular rod in the rotary cover assembly located at the bottom of the catalytic shell is rotatably connected to the discharge shell, and the corresponding rotary cover shell is located in the discharge shell, the top of the discharge shell is open, one end of the discharge hose is fixedly installed on the bottom of the discharge shell and is connected, the other end of the discharge hose passes through the fixed shell, and the bottom of the discharge shell is inclined toward the discharge hose.

[0013] Preferably, the liquid outlet assembly includes a drain pipe, a drain hose and a drain cylinder, the drain pipe passes through the corresponding moving block and slidably cooperates with the moving block, the drain cylinder is fixedly mounted on the fixed shell, the drain pipe is fixedly mounted on the output end of the drain cylinder, the drain hose is fixed and connected to the bottom of the drain pipe, and the drain hose passes through the fixed shell.

[0014] Preferably, a rotating motor is fixedly mounted on the bottom of the fixed shell, and an output end of the rotating motor is fixedly mounted on the catalytic shell.

[0015] Preferably, the catalytic shell is rotatably connected in the fixed shell, the fixed shell is provided with an annular hole at a position corresponding to the catalytic shell, a liquid inlet pipe and a liquid outlet pipe are fixedly mounted on the catalytic shell and are connected thereto, the liquid inlet pipe and the liquid outlet pipe are arranged in the annular hole, a heater is arranged on one side of the catalytic module, the liquid inlet pipe and the liquid outlet pipe are both connected to the heater through a hose, a feed pipe is fixed on and connected to the side wall of the fixed shell near the top, a discharge pipe is fixed on and connected to the side wall of the fixed shell near the bottom, and the discharge pipe is connected to the distillation tower.

[0016] A distillation process for preparing 1,3-dioxolane uses the above-mentioned catalytic reaction distillation tower, comprising the following steps: preheated ethylene glycol and formaldehyde are introduced into the top of a fixed shell; the preheated ethylene glycol and formaldehyde enter the catalytic tube through a catalytic cover, and react under the action of catalytic particles in the catalytic tube; the resulting mixture enters the distillation tower for distillation, and the rectified 1,3-dioxolane is collected; when the catalytic particles in the catalytic tube need to be replaced, the corresponding catalytic tube is rotated to the position of a screw cap assembly, at which time two screw cap assemblies are located at both ends of the catalytic tube, the screw cap assembly removes the catalytic caps at both ends of the catalytic tube, and the catalytic particles in the catalytic tube are discharged through a discharging assembly; the corresponding catalytic tube is rotated to the position of a cleaning assembly, the cleaning tube moves downward into the catalytic tube and rotates, and the cleaning brush rotates to The catalytic tube is cleaned, and cleaning liquid is sprayed out of the cleaning tube to flush the catalytic tube. The liquid outlet assembly is located at the bottom of the catalytic tube to discharge impurities and cleaning liquid. After flushing, the cleaning assembly is reset; the corresponding catalytic tube is rotated to the position of the screw cap assembly, and the screw cap assembly located at the bottom of the catalytic tube installs the catalytic cover at the bottom of the catalytic tube; the corresponding catalytic tube is rotated to the position of the filler assembly, and the filler assembly fills new catalytic particles into the catalytic tube; the corresponding catalytic tube is rotated to the position of the screw cap assembly, and the screw cap assembly located at the top of the catalytic tube installs the catalytic cover on the top of the catalytic tube; the catalytic particles in the catalytic tube are replaced; the two adjustment assemblies drive the cleaning assembly, the screw cap assembly, the filler assembly, the discharge assembly and the liquid outlet assembly to move synchronously toward the axial direction of the catalytic shell, so that it can replace the catalytic particles in the catalytic tube of the inner circle of the catalytic shell.

[0017] In summary, the technical effects and advantages of the present invention are as follows:

[0018] 1. In the present invention, the catalytic particles in the catalytic tube can be replaced, ensuring that the catalytic particles in the catalytic tube have good catalytic efficiency. At the same time, the catalytic tube can be cleaned to ensure that there are no impurities and residual inefficient catalytic particles in the catalytic tube, thereby improving the catalytic reaction efficiency. By replacing the catalytic particles in one catalytic tube separately each time, during the replacement process, the other catalytic tubes can still perform catalytic reactions, thereby reducing the downtime due to replacing the catalytic particles and cleaning the catalytic tubes;

[0019] 2. In the present invention, in the process of replacing the catalytic particles in the catalytic tube, the catalytic cover is disassembled, the catalytic particles are discharged, the catalytic tube is cleaned, new catalytic particles are filled in the catalytic tube, and the catalytic cover is installed in sequence, and the old catalytic particles and the cleaning waste water are discharged simultaneously, so that the replacement of the catalytic particles in the catalytic tube is smoother, the replacement time is short, and the degree of manual intervention is low;

[0020] 3. In the present invention, the adjustment component can drive the cleaning component, the screw cap component, the filler component, the discharge component and the liquid discharge component to move synchronously toward the axial direction of the catalytic shell, so that the catalytic particles of the catalytic tube in the inner circle of the catalytic shell can be replaced, with a wide replacement range and stronger adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the distillation tower, the catalytic shell and the fixed shell in the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the adjustment component, the capping component, the cleaning component and the filling component in the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the catalytic shell, the material discharge assembly and the liquid discharge assembly in the present invention;

[0026] Figure 5 For the present invention Figure 4 A magnified view of part A;

[0027] Figure 6 It is a schematic diagram of the structure of the catalytic shell, catalytic assembly and fixed shell in the present invention;

[0028] Figure 7 For the present invention Figure 6 A magnified view of part B;

[0029] Figure 8 It is a schematic diagram of the structure of the cleaning tube, the rectangular rod and the filling tube in the present invention;

[0030] Fig. 9 For the present invention Figure 8 Enlarged view of part C;

[0031] Fig.10 It is a schematic diagram of the structure of the catalytic tube and the catalytic cover in the present invention;

[0032] Fig.11 For the present invention Fig.10 Magnified view of part D.

[0033] In the figure: 1, distillation tower; 2, catalytic module; 21, catalytic shell; 22, fixed shell; 3, discharge assembly; 31, discharge shell; 32, discharge hose; 4, liquid discharge assembly; 41, discharge pipe; 42, discharge cylinder; 5, catalytic assembly; 51, catalytic tube; 52, catalytic cover; 6, adjustment assembly; 61, drive unit; 611, drive motor; 612, drive gear; 613, drive gear ring; 62, adjustment unit; 621, adjustment gear; 622, adjustment screw; 623, moving block; 7 , screw cap assembly; 71, rectangular rod; 72, screw cap shell; 73, screw cap motor; 74, screw cap belt; 75, rectangular sleeve; 76, screw cap cylinder; 8, cleaning assembly; 81, cleaning pipe; 82, moving screw; 83, moving motor; 84, moving plate; 85, cleaning motor; 86, cleaning belt; 9, stuffing assembly; 91, stuffing pipe; 92, stuffing cylinder; 10, rotating motor; 11, liquid inlet pipe; 12, liquid outlet pipe; 13, heater; 14, feed pipe; 15, outlet pipe. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example 1: Reference Figure 1-Figure 11A catalytic reaction distillation tower shown in the figure includes a distillation tower 1 and a catalytic module 2, the catalytic module 2 includes a catalytic shell 21 and a fixed shell 22, the catalytic shell 21 can rotate in the fixed shell 22, a plurality of catalytic components 5 are connected to the catalytic shell 21, and the plurality of catalytic components 5 are arranged concentrically in a circle; the catalytic component 5 also includes a catalytic tube 51 and two catalytic covers 52, the two catalytic covers 52 are respectively threadedly connected to the two ends of the catalytic tube 51, and the catalytic covers 52 are provided with catalytic holes; the catalytic module 2 also includes two groups of adjustment components 6, the two groups of adjustment components 6 are respectively arranged at the top and bottom of the catalytic shell 21, the adjustment component 6 includes a driving unit 61 and a plurality of adjustment units 62, the driving unit 61 can drive the plurality of adjustment units 62 to move toward the axial direction of the catalytic shell 21, and the plurality of adjustment units 62 located at the top of the catalytic shell 21 The adjustment unit 62 is respectively connected to the screw cap assembly 7, the cleaning assembly 8 and the filling assembly 9, and the several adjustment units 62 located at the bottom of the catalytic shell 21 are respectively connected to the discharge assembly 3, the screw cap assembly 7 and the liquid discharge assembly 4; the screw cap assembly 7 can disassemble the catalytic cover 52 at the end of the catalytic tube 51; the cleaning assembly 8 includes a cleaning tube 81 and a cleaning brush, the cleaning brush is fixedly installed on the cleaning tube 81, the cleaning tube 81 can move vertically and rotate, and the cleaning tube 81 is provided with several cleaning holes at equal intervals, and the cleaning liquid can be sprayed out through the cleaning holes; the filling assembly 9 can pass the catalytic material into the catalytic tube 51; the liquid discharge assembly 4 corresponds to the cleaning assembly 8, and can discharge the cleaning liquid in the catalytic tube 51; the discharge assembly 3 corresponds to the screw cap assembly 7, and the discharge assembly 3 can discharge the catalytic material in the catalytic tube 51.

[0036] The preheated material is passed into the top of the fixed shell 22, and the preheated material enters the catalytic tube 51 through the catalytic cover 52, and reacts under the action of the catalytic particles in the catalytic tube 51, and the resulting mixture enters the distillation tower 1 for distillation, and the components after distillation are collected. When the catalytic particles in the catalytic tube 51 need to be replaced, the corresponding catalytic tube 51 is rotated to the position of the screw cap assembly 7. At this time, the two screw cap assemblies 7 are located at both ends of the catalytic tube 51. The screw cap assembly 7 removes the catalytic covers 52 at both ends of the catalytic tube 51, and the catalytic particles in the catalytic tube 51 are discharged through the discharge assembly 3, and the corresponding catalytic tube 51 is rotated to the position of the cleaning assembly 8. The cleaning tube 81 moves downward into the catalytic tube 51 and rotates. The cleaning brush rotates to clean the catalytic tube 51, and at the same time, the cleaning tube 81 sprays cleaning liquid to rinse the catalytic tube 51. The liquid discharge assembly 4 At the bottom of the catalytic tube 51, impurities and cleaning liquid are discharged. After flushing, the cleaning component 8 is reset, and the corresponding catalytic tube 51 is rotated to the position of the screw cap component 7. The screw cap component 7 located at the bottom of the catalytic tube 51 installs the catalytic cover 52 at the bottom of the catalytic tube 51. The corresponding catalytic tube 51 is rotated to the position of the filling component 9. The filling component 9 fills new catalytic particles into the catalytic tube 51. The corresponding catalytic tube 51 is rotated to the position of the screw cap component 7. The screw cap component 7 located at the top of the catalytic tube 51 installs the catalytic cover 52 at the top of the catalytic tube 51. The catalytic particles in the catalytic tube 51 are replaced. The two adjustment components 6 drive the cleaning component 8, the screw cap component 7, the filling component 9, the discharge component 3 and the liquid discharge component 4 to move synchronously toward the axial direction of the catalytic shell 21, so that it can replace the catalytic particles of the catalytic tube 51 in the inner circle of the catalytic shell 21.

[0037] The catalytic particles in the catalytic tube 51 can be replaced, ensuring that the catalytic particles in the catalytic tube 51 have good catalytic efficiency. At the same time, the catalytic tube 51 can be cleaned to ensure that there are no impurities and residual inefficient catalytic particles in the catalytic tube 51, thereby improving the catalytic reaction efficiency. By replacing the catalytic particles in one catalytic tube 51 individually each time, during the replacement process, the other catalytic tubes 51 can still carry out catalytic reactions, thereby reducing the downtime due to replacing the catalytic particles and cleaning the catalytic tubes 51.

[0038] In the process of replacing the catalytic particles in the catalytic tube 51, the catalytic cover 52 is disassembled, the catalytic particles are discharged, the catalytic tube 51 is cleaned, new catalytic particles are filled in the catalytic tube 51, and the catalytic cover 52 is installed. The old catalytic particles and cleaning waste water are discharged simultaneously, so that the replacement of the catalytic particles in the catalytic tube 51 is smoother, the replacement time is short, and the degree of manual intervention is low.

[0039] The adjustment component 6 can drive the cleaning component 8, the screw cap component 7, the filler component 9, the discharge component 3 and the liquid discharge component 4 to move synchronously toward the axial direction of the catalytic shell 21, so that it can replace the catalytic particles of the catalytic tube 51 in the inner circle of the catalytic shell 21, with a large replacement range and stronger adaptability.

[0040] Example 2, reference Figure 1-Figure 11 , which is different from the above-mentioned embodiment, the driving unit 61 includes a driving motor 611, a driving gear 612 and a driving ring gear 613. The driving motor 611 is fixedly mounted on the fixed shell 22, the driving gear 612 is fixedly mounted on the output end of the driving motor 611, and the driving ring gear 613 is meshed with the driving gear 612. The adjusting unit 62 includes an adjusting gear 621, an adjusting screw 622, a moving block 623 and a limiting rod. The adjusting gear 621 is fixedly mounted on the adjusting screw 622, the moving block 623 is sleeved on the adjusting screw 622 and is threadedly connected with the adjusting screw 622, the moving block 623 is sleeved on the limiting rod and slidably cooperates with the limiting rod, and the adjusting gear 621 is meshed with the driving ring gear 613.

[0041] The driving motor 611 drives the driving gear 612 to rotate, the driving gear 612 drives the driving gear ring 613 to rotate, the driving gear 612 drives the adjusting gear 621 to rotate, the adjusting gear 621 drives the adjusting screw 622 to rotate, the moving block 623 moves on the adjusting screw 622, and the moving block 623 drives the cleaning assembly 8, the screw cap assembly 7, the filling assembly 9, the discharging assembly 3 and the liquid discharging assembly 4 to move synchronously.

[0042] Example 3, reference Figure 1-Figure 11 , which is different from the above-mentioned embodiment, the cleaning component 8 includes a moving screw 82, a moving motor 83, a moving plate 84, a cleaning motor 85, a cleaning belt 86 and a cleaning hose, the moving screw 82 is rotatably connected to the catalytic shell 21, the moving motor 83 is fixedly mounted on the fixed shell 22, the moving screw 82 is fixedly mounted on the output end of the moving motor 83, the adjustment component 6 located at the top of the catalytic shell 21 is arranged on the moving plate 84, the moving plate 84 is sleeved on the moving screw 82 and is threadedly connected to the moving screw 82, the cleaning motor 85 is fixedly mounted on the corresponding moving block 623, the cleaning pipe 81 is rotatably connected to the corresponding moving block 623, the cleaning belt 86 includes a cleaning active pulley, a cleaning passive pulley and a cleaning belt, the cleaning active pulley is fixedly mounted on the output end of the cleaning motor 85, the cleaning passive pulley is fixedly mounted on the cleaning pipe 81, the cleaning belt is connected to the cleaning active pulley and the cleaning passive pulley, one end of the cleaning hose is rotatably connected to the cleaning pipe 81 and communicated with the cleaning pipe 81, and the cleaning hose passes through the fixed shell 22 and is communicated with the external water source.

[0043] The moving motor 83 drives the moving plate 84 to move, and the moving plate 84 drives the adjustment unit 62 to move. At the same time, the moving plate 84 drives the cleaning tube 81 to move, and the cleaning tube 81 extends into the corresponding catalytic tube 51. The cleaning motor 85 drives the cleaning active pulley to rotate, and the cleaning active pulley drives the cleaning belt to rotate. The cleaning belt makes the cleaning passive pulley rotate, and the cleaning passive pulley drives the cleaning tube 81 to rotate. The cleaning tube 81 drives the cleaning brush to rotate, and the cleaning brush cleans the impurities in the catalytic tube 51. The cleaning hose is connected to the external water source through a water pump.

[0044] The driving gear ring 613 in the adjustment assembly 6 located at the top of the catalytic tube 51 is rotatably connected to the moving plate 84 .

[0045] A cleaning bar hole is opened on the movable plate 84 at a position corresponding to the cleaning pipe 81, and the cleaning pipe 81 is arranged through the cleaning bar hole.

[0046] Example 4, reference Figure 1-Figure 11 , which is different from the above embodiment, the capping assembly 7 includes a rectangular rod 71, a capping shell 72, a capping motor 73, a capping belt 74, a rectangular sleeve 75 and a capping cylinder 76, the capping motor 73 is fixedly mounted on the corresponding moving block 623, the rectangular sleeve 75 is rotatably connected to the corresponding moving block 623, a rectangular groove is provided on the rectangular sleeve 75, the rectangular rod 71 is arranged in the rectangular groove and slidably cooperates with the rectangular sleeve 75, the capping cylinder 76 is fixedly mounted on the fixed shell 22, and the rectangular rod 71 is rotatably connected to the rotating At the output end of the cover cylinder 76, the cover belt member 74 includes a cover driving pulley, a cover passive pulley and a cover belt. The cover driving pulley is fixedly mounted on the output end of the cover motor 73, the cover passive pulley is fixedly mounted on the rectangular sleeve 75, the cover belt is connected to the cover driving pulley and the cover passive pulley, the cover shell 72 is fixedly mounted on the rectangular rod 71, the cover shell 72 is fixedly mounted with cover teeth, the catalytic cover 52 is fixedly mounted with catalytic cover teeth, and the cover shell 72 is fixedly mounted with an extrusion rubber ring.

[0047] When the corresponding catalytic tube 51 moves to the position of the screw cap assembly 7, the screw cap cylinder 76 drives the rectangular rod 71 to move, and the rectangular rod 71 drives the screw cap shell 72 to move. The screw cap shell 72 moves and is sleeved on the corresponding catalytic cover 52. The screw cap teeth in the screw cap shell 72 engage with the catalytic cover teeth on the catalytic cover 52. The screw cap motor 73 drives the screw cap active pulley to rotate, and the screw cap active pulley drives the screw cap belt to rotate. The screw cap belt causes the screw cap passive pulley to rotate. The screw cap passive pulley drives the rectangular sleeve 75 to rotate. The rectangular sleeve 75 drives the rectangular rod 71 to rotate. The rectangular rod 71 drives the screw cap shell 72 to rotate. The screw cap shell 72 rotates the catalytic cover 52 from the catalytic tube 51 to release its threaded connection and remove it. The rubber ring is squeezed to clamp the catalytic cover 52 so that it remains in the screw cap shell 72. Otherwise, the catalytic cover 52 is installed on the catalytic tube 51.

[0048] The inner wall cross-section of the rectangular sleeve 75 is rectangular. The rectangular sleeve 75 is sleeved on the rectangular rod 71 and slidably matched with the rectangular rod 71 .

[0049] Example 5, reference Figure 1-Figure 11 , which is different from the above-mentioned embodiment, is that the filling assembly 9 includes a filling tube 91, a filling cylinder 92 and a filling hose, the filling tube 91 passes through the corresponding moving block 623 and slides with the moving block 623, the filling cylinder 92 is fixedly mounted on the fixed shell 22, the filling tube 91 is fixedly mounted on the output end of the filling cylinder 92, the filling hose is fixedly mounted on the top of the filling tube 91 and is connected to the filling tube 91, and the filling hose passes through the fixed shell 22 and is connected to the external silo.

[0050] After removing the catalytic cover 52 on the top of the catalytic tube 51 and cleaning the catalytic tube 51, the catalytic tube 51 is rotated to the position of the filling assembly 9, and the filling cylinder 92 drives the filling tube 91 to move downward. The filling tube 91 is inserted into the corresponding catalytic tube 51, and the catalytic particles in the external silo enter the filling tube 91 through the filling hose and finally enter the catalytic tube 51.

[0051] The filling hose is connected to the external silo through a screw pump and is used to transport catalytic particles.

[0052] The lengths of the cleaning hose and the filling hose are selected according to actual needs, which is the prior art.

[0053] Example 6, reference Figure 1-Figure 11 , which is different from the above-mentioned embodiment, the adjustment assembly 6 located at the bottom of the catalytic shell 21 is installed on the fixed shell 22, the discharge assembly 3 includes a discharge shell 31 and a discharge hose 32, the rectangular rod 71 in the rotary cover assembly 7 located at the bottom of the catalytic shell 21 is rotatably connected to the discharge shell 31, and the corresponding rotary cover shell 72 is located in the discharge shell 31, the top of the discharge shell 31 is open, one end of the discharge hose 32 is fixedly installed at the bottom of the discharge shell 31 and is connected, the other end of the discharge hose 32 passes through the fixed shell 22, and the bottom of the discharge shell 31 is inclined toward the discharge hose 32.

[0054] When the rotary cap assembly 7 at the bottom of the catalytic tube 51 removes the catalytic cover 52 at the bottom of the catalytic tube 51, the catalytic particles in the catalytic tube 51 fall into the discharge shell 31 and are discharged to the outside through the discharge shell 31 for recovery.

[0055] One end of the screw cap shell 72 away from the catalytic tube 51 is preferably hollowed out to prevent a large amount of catalytic particles from being retained in the screw cap shell 72. This is a prior art and is not shown in the figure.

[0056] Example 7, reference Figure 1-Figure 11, which is different from the above-mentioned embodiment, the liquid outlet component 4 includes a drain pipe 41, a drain hose and a drain cylinder 42. The drain pipe 41 passes through the corresponding moving block 623 and slides with the moving block 623. The drain cylinder 42 is fixedly installed on the fixed shell 22. The drain pipe 41 is fixedly installed at the output end of the drain cylinder 42. The drain hose is fixed and connected to the bottom of the drain pipe 41, and the drain hose passes through the fixed shell 22.

[0057] When the catalytic tube 51 rotates to the position of the cleaning assembly 8, the liquid outlet assembly 4 is located below the catalytic tube 51, and the drain cylinder 42 drives the drain pipe 41 to move. When the drain pipe 41 is abutted against the catalytic shell 21, the end of the catalytic tube 51 is located in the drain pipe 41, and the impurities and cleaning liquid in the drain pipe 41 enter the drain pipe 41 and are discharged through the drain hose.

[0058] Example 8, reference Figure 1-Figure 11 , which is different from the above-mentioned embodiment, a rotating motor 10 is fixedly mounted on the bottom of the fixed shell 22 , and an output end of the rotating motor 10 is fixedly mounted on the catalytic shell 21 .

[0059] The rotating motor 10 drives the catalytic shell 21 to rotate, and the catalytic shell 21 drives the catalytic tube 51 to rotate.

[0060] Example 9, reference Figure 1-Figure 11 , which is different from the above-mentioned embodiment, the catalytic shell 21 is rotatably connected in the fixed shell 22, and an annular hole is opened in the fixed shell 22 at a position corresponding to the catalytic shell 21, and an inlet pipe 11 and an outlet pipe 12 are fixedly installed on the catalytic shell 21 and are connected, and the inlet pipe 11 and the outlet pipe 12 are arranged in the annular hole, and a heater 13 is arranged on one side of the catalytic module 2, and the inlet pipe 11 and the outlet pipe 12 are connected to the heater 13 through a hose, and a feed pipe 14 is fixed on and connected to the side wall of the fixed shell 22 near the top, and a discharge pipe 15 is fixed on and connected to the side wall of the fixed shell 22 near the bottom, and the discharge pipe 15 is connected to the distillation tower 1.

[0061] The heater 13 heats water and passes the hot water into the catalyst shell 21 . The water in the catalyst shell 21 circulates into the heater 13 to heat the catalyst tube 51 , thereby improving the catalytic efficiency in the catalyst tube 51 .

[0062] The heater 13 is connected to the liquid inlet pipe 11 through a heating water pump for water circulation.

[0063] The liquid inlet pipe 11 and the liquid outlet pipe 12 are both connected to the heater 13 through a hose, which will not affect the rotation of the catalytic shell 21.

[0064] The substance enters the fixed shell 22 through the feed pipe 14, and then enters the distillation tower 1 through the discharge pipe 15 after reacting through the catalytic tube 51. The distillation tower 1 distills and extracts the substance to extract the specified components.

[0065] A distillation process for preparing 1,3-dioxolane uses the above-mentioned catalytic reaction distillation tower, including the following steps: preheated ethylene glycol and formaldehyde are introduced into the top of the fixed shell 22; the preheated ethylene glycol and formaldehyde enter the catalytic tube 51 through the catalytic cover 52, and react under the action of the catalytic particles in the catalytic tube 51; the resulting mixture enters the distillation tower 1 for distillation, and the 1,3-dioxolane after distillation is collected; when the catalytic particles in the catalytic tube 51 need to be replaced, the corresponding catalytic tube 51 is rotated to the position of the screw cap assembly 7, at which time the two screw cap assemblies 7 are located at both ends of the catalytic tube 51, the screw cap assembly 7 removes the catalytic covers 52 at both ends of the catalytic tube 51, and the catalytic particles in the catalytic tube 51 are discharged through the discharge assembly 3; the corresponding catalytic tube 51 is rotated to the position of the cleaning assembly 8, the cleaning tube 81 moves downward into the catalytic tube 51 and rotates, and the cleaning brush rotates to clean the catalytic tube 51, and at the same time When the cleaning tube 81 sprays cleaning liquid to flush the catalytic tube 51, the liquid outlet component 4 is located below the catalytic tube 51 to discharge impurities and cleaning liquid. After flushing, the cleaning component 8 is reset; the corresponding catalytic tube 51 is rotated to the position of the screw cap component 7, and the screw cap component 7 located at the bottom of the catalytic tube 51 installs the catalytic cover 52 at the bottom of the catalytic tube 51; the corresponding catalytic tube 51 is rotated to the position of the filler component 9, and the filler component 9 fills new catalytic particles into the catalytic tube 51; the corresponding catalytic tube 51 is rotated to the position of the screw cap component 7, and the screw cap component 7 located at the top of the catalytic tube 51 installs the catalytic cover 52 at the top of the catalytic tube 51; the replacement of the catalytic particles in the catalytic tube 51 is completed; the two adjustment components 6 drive the cleaning component 8, the screw cap component 7, the filler component 9, the discharge component 3 and the liquid outlet component 4 to move synchronously toward the axial direction of the catalytic shell 21, so that it can replace the catalytic particles of the catalytic tube 51 in the inner circle of the catalytic shell 21.

[0066] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A catalytic reaction distillation tower, comprising a distillation tower and a catalytic module, characterized in that: The catalytic module comprises a catalytic shell and a fixed shell, the catalytic shell being capable of rotating within the fixed shell, a plurality of catalytic components being connected to the catalytic shell, and the plurality of catalytic components being arranged concentrically in a circle; the catalytic component also comprises a catalytic tube and two catalytic covers, the two catalytic covers being respectively threadedly connected to the two ends of the catalytic tube, and a catalytic hole being provided on the catalytic cover; the catalytic module also comprises two groups of adjustment components, the two groups of adjustment components being respectively arranged at the top and the bottom of the catalytic shell, the adjustment component comprising a driving unit and a plurality of adjustment units, the driving unit being capable of driving a plurality of adjustment units to move toward the axial direction of the catalytic shell, a plurality of adjustment units located at the top of the catalytic shell being respectively connected to a screw cap assembly, a cleaning assembly and a packing assembly, and a plurality of adjustment units located at the bottom of the catalytic shell being respectively connected to a discharge assembly, a screw cap assembly and a liquid discharge assembly; the screw cap assembly is capable of disassembling and installing the catalytic cover at the end of the catalytic tube; the cleaning assembly comprises a cleaning tube and a cleaning brush, the cleaning brush being fixed The cleaning tube is installed on the cleaning tube, and the cleaning tube can move vertically and rotate. The cleaning tube is provided with a plurality of cleaning holes at equal intervals, and cleaning liquid can be sprayed out through the cleaning holes. The filler assembly can pass the catalytic material into the catalytic tube. The liquid outlet assembly corresponds to the cleaning assembly and can discharge the cleaning liquid in the catalytic tube. The material discharging assembly corresponds to the screw cap assembly and can discharge the catalytic material in the catalytic tube. The driving unit comprises a driving motor, a driving gear and a driving gear ring. The driving motor is fixedly mounted on the fixed shell, the driving gear is fixedly mounted on the output end of the driving motor, the driving gear ring is meshed with the driving gear, the adjusting unit comprises an adjusting gear, an adjusting screw, a moving block and a limiting rod, the adjusting gear is fixedly mounted on the adjusting screw, the moving block is sleeved on the adjusting screw and is threadedly connected to the adjusting screw, the moving block is sleeved on the limiting rod and slidably cooperates with the limiting rod, and the adjusting gear is meshed with the driving gear ring.The cleaning assembly includes a moving screw, a moving motor, a moving plate, a cleaning motor, a cleaning belt and a cleaning hose. The moving screw is rotatably connected to the catalytic shell, the moving motor is fixedly mounted on the fixed shell, the moving screw is fixedly mounted on the output end of the moving motor, the adjustment assembly located on the top of the catalytic shell is arranged on the moving plate, the moving plate is sleeved on the moving screw and is threadedly connected to the moving screw, the cleaning motor is fixedly mounted on the corresponding moving block, the cleaning pipe is rotatably connected to the corresponding moving block, the cleaning belt includes a cleaning active pulley, a cleaning passive pulley and a cleaning belt, the cleaning active pulley is fixedly mounted on the output end of the cleaning motor, the cleaning passive pulley is fixedly mounted on the cleaning pipe, the cleaning belt is connected to the cleaning active pulley and the cleaning passive pulley, one end of the cleaning hose is rotatably connected to the cleaning pipe and communicated with the cleaning pipe, and the cleaning hose passes through the fixed shell and communicates with an external water source. ; 2. A catalytic reaction distillation tower according to claim 1, characterized in that: The rotary cover assembly comprises a rectangular rod, a rotary cover shell, a rotary cover motor, a rotary cover belt, a rectangular sleeve and a rotary cover cylinder, the rotary cover motor is fixedly mounted on the corresponding moving block, the rectangular sleeve is rotatably connected to the corresponding moving block, a rectangular groove is opened on the rectangular sleeve, the rectangular rod is arranged in the rectangular groove and slidably cooperates with the rectangular sleeve, the rotary cover cylinder is fixedly mounted on the fixed shell, the rectangular rod is rotatably connected to the output end of the rotary cover cylinder, the rotary cover belt comprises a rotary cover active pulley, a rotary cover passive pulley and a rotary cover belt, the rotary cover active pulley is fixedly mounted on the output end of the rotary cover motor, the rotary cover passive pulley is fixedly mounted on the rectangular sleeve, the rotary cover belt is connected to the rotary cover active pulley and the rotary cover passive pulley, the rotary cover shell is fixedly mounted on the rectangular rod, a rotary cover tooth is fixedly mounted in the rotary cover shell, a catalytic cover tooth is fixedly mounted on the catalytic cover, and an extrusion rubber ring is fixedly mounted in the rotary cover shell.

3. A catalytic reaction distillation tower according to claim 2, characterized in that: The filling assembly includes a filling tube, a filling cylinder and a filling hose. The filling tube passes through the corresponding moving block and slides with the moving block. The filling cylinder is fixedly installed on the fixed shell. The filling tube is fixedly installed at the output end of the filling cylinder. The filling hose is fixedly installed on the top of the filling tube and is connected to the filling tube. The filling hose passes through the fixed shell and is connected to an external silo.

4. A catalytic reaction distillation tower according to claim 3, characterized in that: The adjustment assembly located at the bottom of the catalytic shell is installed on the fixed shell, the discharge assembly includes a discharge shell and a discharge hose, the rectangular rod in the rotary cover assembly located at the bottom of the catalytic shell is rotatably connected to the discharge shell, and the corresponding rotary cover shell is located in the discharge shell, the top of the discharge shell is open, one end of the discharge hose is fixedly installed on the bottom of the discharge shell and connected, the other end of the discharge hose passes through the fixed shell, and the bottom of the discharge shell is inclined toward the discharge hose.

5. A catalytic reaction distillation tower according to claim 4, characterized in that: The liquid outlet assembly includes a drain pipe, a drain hose and a drain cylinder. The drain pipe passes through the corresponding moving block and slidably cooperates with the moving block. The drain cylinder is fixedly installed on the fixed shell. The drain pipe is fixedly installed on the output end of the drain cylinder. The drain hose is fixed and connected to the bottom of the drain pipe, and the drain hose passes through the fixed shell.

6. A catalytic reaction distillation tower according to claim 5, characterized in that: A rotating motor is fixedly mounted on the bottom of the fixed shell, and an output end of the rotating motor is fixedly mounted on the catalytic shell.

7. A catalytic reaction distillation tower according to claim 6, characterized in that: The catalytic shell is rotatably connected in the fixed shell, and an annular hole is opened in the fixed shell at a position corresponding to the catalytic shell. A liquid inlet pipe and a liquid outlet pipe are fixedly installed on the catalytic shell and are connected, and the liquid inlet pipe and the liquid outlet pipe are arranged in the annular hole. A heater is arranged on one side of the catalytic module, and the liquid inlet pipe and the liquid outlet pipe are connected to the heater through a hose. A feed pipe is fixed on and connected to the side wall of the fixed shell near the top, and a discharge pipe is fixed on and connected to the side wall of the fixed shell near the bottom, and the discharge pipe is connected to the distillation tower.

8. A distillation process for preparing 1,3-dioxolane, using the catalytic reaction distillation tower as claimed in claim 7, characterized in that: The method comprises the following steps: introducing preheated ethylene glycol and formaldehyde into the top of a fixed shell; the preheated ethylene glycol and formaldehyde enter into a catalytic tube through a catalytic cover, and react under the action of catalytic particles in the catalytic tube; the resulting mixture enters a distillation tower for rectification, and collects 1,3-dioxolane after rectification; when it is necessary to replace the catalytic particles in the catalytic tube, the corresponding catalytic tube is rotated to the position of a screw cap assembly, at which time two screw cap assemblies are located at both ends of the catalytic tube, the screw cap assembly removes the catalytic covers at both ends of the catalytic tube, and the catalytic particles in the catalytic tube are discharged through a discharging assembly; the corresponding catalytic tube is rotated to the position of a cleaning assembly, the cleaning tube moves downward into the catalytic tube and rotates, the cleaning brush rotates to clean the catalytic tube, and at the same time the cleaning tube sprays cleaning liquid to rinse the catalytic tube, and the liquid discharge assembly Located below the catalytic tube, impurities and cleaning liquid are discharged, and the cleaning component is reset after flushing is completed; the corresponding catalytic tube is rotated to the position of the screw cap component, and the screw cap component located at the bottom of the catalytic tube installs the catalytic cover at the bottom of the catalytic tube; the corresponding catalytic tube is rotated to the position of the filler component, and the filler component fills new catalytic particles into the catalytic tube; the corresponding catalytic tube is rotated to the position of the screw cap component, and the screw cap component located at the top of the catalytic tube installs the catalytic cover on the top of the catalytic tube; the replacement of the catalytic particles in the catalytic tube is completed; the two adjustment components drive the cleaning component, the screw cap component, the filler component, the discharge component and the liquid discharge component to move synchronously toward the axial direction of the catalytic shell, so that the cleaning component, the screw cap component, the filler component, the discharge component and the liquid discharge component can replace the catalytic particles in the catalytic tube of the inner circle of the catalytic shell.

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