Continuous esterification reaction device for chemical product production

Abstract

The utility model relates to a continuous esterification reaction device for producing chemical products, which comprises an esterification tower, the upper part of which is communicated with a raw material liquid conveying pipeline, the lower part of which is communicated with a raw material gas conveying pipeline, the bottom of which is communicated with a tail liquid discharge pipeline and the top of which is communicated with a tail gas discharge pipeline, a plurality of square through grooves are formed in the left side wall and the right side wall of the esterification tower between the raw material liquid conveying pipeline and the raw material gas conveying pipeline, the through grooves are distributed in a vertically spaced and staggered mode, square blind grooves are formed in the positions, opposite to the through grooves, of the inner side wall of the esterification tower, and L-shaped supporting plates are arranged on the positions, corresponding to the through grooves, of the outer side wall of the esterification tower; the vertical part of the supporting plate is propped against the outer side wall of the esterification tower, and a filler net cage is fixedly arranged on one side, far away from the horizontal part, of the supporting plate; filler is contained in the filler net cage, and the filler net cage extends into the esterification tower through the corresponding through groove and is inserted into the corresponding blind groove. The packing net cage can be conveniently disassembled, assembled and replaced, and the packing net cage is more practical.

Description

Technical Field

[0001] This utility model belongs to the field of esterification reaction technology, specifically relating to a continuous esterification reaction device for chemical product production. Background Technology

[0002] Currently, the production and processing of some chloroformate chemical products mainly involves the continuous esterification of phosgene with alcohol compounds in an esterification tower. Phosgene enters from the bottom of the esterification tower and flows upward, countercurrently contacting the alcohol compounds that enter from the top and flow downward at multiple layers of packing material, thus continuously esterifying to produce chloroformate chemical products. However, existing esterification towers often have an integral structure between the packing layer and the tower body. When problems such as blockage occur in the packing layer, it is not possible to quickly disassemble and replace the packing layer. The overall use is not flexible and convenient enough, and it is not conducive to continuous esterification reactions, thus requiring improvement. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a continuous esterification reaction device for chemical product production, which can realize convenient disassembly and replacement of the packing mesh box, so as to solve the above problems.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a continuous esterification reaction device for chemical product production, comprising an esterification tower, wherein the upper part of the esterification tower is connected to a raw material liquid conveying pipeline, the lower part is connected to a raw material gas conveying pipeline, the bottom is connected to a tail liquid discharge pipeline, and the top is connected to a tail gas discharge pipeline. The cross-section of the esterification tower is square, and several square through slots are formed on the left and right side walls of the esterification tower between the raw material liquid conveying pipeline and the raw material gas conveying pipeline. The through slots are distributed alternately at intervals, and each through slot... Square blind slots are provided on the inner sidewalls of the esterification towers. An L-shaped support plate is provided on the outer sidewall of the esterification tower corresponding to each slot. A packing mesh box is fixed to the vertical portion of the support plate, which abuts against the outer sidewall of the esterification tower. The packing mesh box contains packing material that extends into the esterification tower through the corresponding slot and is inserted into the corresponding blind slot. Several blind holes are provided at intervals along the front-to-back direction on the top of the vertical portion of the support plate. A first hydraulic cylinder is vertically fixed to the outer sidewall of the esterification tower above the support plate. The piston rod of the first hydraulic cylinder faces downward and is fixedly connected to a limiting plate. Several insert rods are fixedly provided at the bottom of the limiting plate. The limiting plate abuts against the top of the vertical part of the adjacent support plate. The insert rods correspond one-to-one with the blind holes on the adjacent support plate and are inserted into it. A through groove is opened in the middle of the horizontal part of the support plate. Positioning blocks are fixedly provided on the left and right sides of the bottom of the horizontal part of the support plate. Guide rails are fixedly provided on the left and right sides of the esterification tower along the left and right directions. An electric slider is slidably provided on the guide rails. A second hydraulic cylinder is fixedly provided on the top of the electric slider. The piston rod of the second hydraulic cylinder faces upward and is fixedly connected to a lifting seat. A motor is built into the center of the lifting seat. The output shaft of the motor extends upward out of the lifting seat and is fixedly connected to a pressure plate. Positioning grooves are opened on the left and right sides of the top of the lifting seat. The lifting seat can abut against the horizontal part of the support plate. Two positioning blocks correspond one-to-one with two positioning grooves and are inserted into it. The pressure plate can pass through the through groove to the upper surface of the horizontal part of the support plate and abut against the upper surface of the horizontal part of the support plate after rotating 90 degrees.

[0005] Preferably, the through groove and the blind groove are both adapted to the packing mesh box.

[0006] Preferably, the insertion rod is adapted to the corresponding blind hole.

[0007] Preferably, the positioning block is adapted to the corresponding positioning groove.

[0008] Preferably, the cross-sectional area of ​​the through groove is larger than the cross-sectional area of ​​the pressure plate.

[0009] The beneficial effects of this invention are as follows: During continuous esterification production, phosgene enters the lower part of the esterification tower through the raw material gas conveying pipeline and flows from bottom to top, while alcohol raw materials enter the upper part of the esterification tower through the raw material liquid conveying pipeline and flow from top to bottom. This allows phosgene and alcohol materials to come into countercurrent contact at the packing material in each layer of the packing mesh box, thereby undergoing an esterification reaction to generate chloroformate chemical products, which are collected at the bottom of the esterification tower. Excess raw material liquid is discharged to the subsequent process through the tail liquid discharge pipeline, and tail gas is discharged to the subsequent process through the tail gas discharge pipeline. When the packing material malfunctions and needs to be replaced, the original packing mesh box can be removed from bottom to top while the machine is stopped. The specific operation is as follows: first, operate the electric slider to drive the second hydraulic cylinder and the lifting seat to move towards the esterification tower until the lifting seat is moved to the bottom of the support plate on the same side. Then, the second hydraulic cylinder is operated, extending its piston rod, which moves the lifting seat upward until it presses against the bottom of the horizontal part of the corresponding support plate. At this point, the positioning block on the corresponding support plate can be inserted into the corresponding positioning groove, and the pressure plate can pass through the through groove on the corresponding support plate to the top of the horizontal part of the corresponding support plate. Next, the motor is operated, driving the pressure plate to rotate 90 degrees, which presses the pressure plate against the upper surface of the horizontal part of the support plate, thus completing the fixed connection between the lifting seat and the support plate. Afterward, the first hydraulic cylinder corresponding to the support plate is operated, retracting its piston rod, which moves the limit plate upward until the insertion rod is completely pulled out, thus releasing the insertion limit on the vertical part of the support plate. Then, the electric slider is operated, causing it to move the lifting seat away from the esterification tower, which also moves the corresponding support plate and the packing mesh away from the esterification tower, until the packing mesh is completely pulled out of the esterification tower, thus completing the disassembly of the corresponding packing mesh. Then, operate the second hydraulic cylinder again to retract its piston rod, which will move the lifting seat and the disassembled packing mesh box down to a suitable height. Then start the motor to rotate the pressure plate 90 degrees, which will release the clamping limit on the horizontal part of the support plate. Then remove the support plate from the lifting seat. After that, continue to remove the other sets of packing mesh boxes according to the above steps. The cooperation of the left and right guide rails, electric sliders, second hydraulic cylinders and lifting seats can simultaneously remove the packing mesh boxes from both sides of the esterification tower, which is more efficient and practical.

[0010] When installing a new packing mesh box, it can be installed sequentially from top to bottom. The specific operation is as follows: First, fix the support plate corresponding to the new packing mesh box onto the lifting seat as described above. Then, operate the corresponding second hydraulic cylinder to extend its piston rod, which will move the lifting seat and the corresponding packing mesh box upwards to the height of the corresponding through slot. Next, operate the corresponding electric slider to move the corresponding lifting seat and packing mesh box towards the esterification tower, allowing the packing mesh box to pass through the corresponding through slot and extend into the esterification tower until it is inserted into the corresponding blind slot. At this point, the vertical part of the support plate can press against the outer wall of the esterification tower. Then, operate the corresponding first hydraulic cylinder to extend its piston rod, which will move the corresponding limiting plate downwards until it presses against the top of the vertical part of the corresponding support plate, allowing the insertion rod to be inserted into the corresponding blind hole, thus achieving the insertion and fixing installation of the support plate. Afterwards, disconnect the lifting seat from the corresponding support plate as described above, allowing the lifting seat to return to its original position. Then, continue installing the other sets of packing mesh boxes following the aforementioned steps. They can also be installed simultaneously from both sides from top to bottom, resulting in higher installation efficiency and greater practicality. This allows for flexible and convenient disassembly and replacement of multi-layer packing mesh boxes, making overall use more flexible and convenient, more conducive to continuous esterification reactions, and more practical. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the main structure of the esterification tower equipped with a packing mesh box according to this utility model;

[0013] Figure 3 This is a schematic diagram of the left side of the esterification tower without the installed packing mesh box according to this utility model;

[0014] Figure 4 This is a schematic diagram of the cross-sectional structure of the esterification tower of this utility model;

[0015] Figure 5 This is a schematic diagram of the main structure of the packing mesh box of this utility model during disassembly and assembly;

[0016] Figure 6 This is a schematic diagram of the main structure of the support plate and the filler mesh box of this utility model;

[0017] Figure 7 This is a top view schematic diagram of the support plate and filler mesh box of this utility model;

[0018] Figure 8 This is a schematic diagram of the main structure of the support plate and packing mesh box of this utility model installed in the esterification tower;

[0019] Figure 9 This is a schematic diagram of the main structure of the lifting seat of this utility model;

[0020] Figure 10 This is a schematic diagram of the main structure of the lifting seat of this utility model;

[0021] Figure 11 This is a front view structural diagram of the connection between the support plate and the lifting seat of this utility model.

[0022] The following numbers are labeled in the diagram: 1 is the esterification tower, 2 is the raw material liquid conveying pipeline, 3 is the raw material gas conveying pipeline, 4 is the tail liquid discharge pipeline, 5 is the tail gas discharge pipeline, 6 is the through groove, 7 is the blind groove, 8 is the support plate, 9 is the packing mesh box, 10 is the packing, 11 is the blind hole, 12 is the first hydraulic cylinder, 13 is the limiting plate, 14 is the insertion rod, 15 is the through groove, 16 is the positioning block, 17 is the guide rail, 18 is the electric slider, 19 is the second hydraulic cylinder, 20 is the lifting seat, 21 is the motor, 22 is the pressure plate, and 23 is the positioning groove. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0024] like Figures 1 to 11As shown, a continuous esterification reaction apparatus for chemical product production includes an esterification tower 1. The upper part of the esterification tower 1 is connected to a raw material liquid conveying pipeline 2, the lower part to a raw material gas conveying pipeline 3, the bottom to a tail liquid discharge pipeline 4, and the top to a tail gas discharge pipeline 5. The cross-section of the esterification tower 1 is square, and several square through-slots 6 are formed on both the left and right side walls of the esterification tower 1 between the raw material liquid conveying pipeline 2 and the raw material gas conveying pipeline 3. The through-slots 6 are distributed alternately at intervals, and a square blind slot 7 is formed on the inner side wall of the esterification tower 1 opposite to each through-slot 6. Each esterification tower 1 corresponding to a through-slot 6 is provided with an L-shaped support plate 8 on its outer wall. The vertical part of the support plate 8 abuts against the outer wall of the esterification tower 1, and a packing mesh box 9 is fixed on the side away from its horizontal part. The packing mesh box 9 contains packing 10, which extends into the esterification tower 1 through the corresponding through-slot 6 and is inserted into the corresponding blind slot 7. Several blind holes 11 are provided on the top of the vertical part of the support plate 8, which are spaced apart in the front-back direction. A first hydraulic cylinder 12 is vertically fixed on the outer wall of the esterification tower 1 above the support plate 8. The piston rod of the first hydraulic cylinder 12 faces downward and is fixedly connected to a limiting plate 13. Several insertion rods 14 are fixed on the bottom of the limiting plate 13. The limiting plate 13 abuts against the top of the vertical part of the adjacent support plate 8, and the insertion rods 14 correspond one-to-one with the blind holes 11 on the adjacent support plate 8 and are inserted into it. A through slot 15 is provided in the middle of the horizontal part of the support plate 8, and positioning blocks 16 are fixed on the left and right sides of the bottom of the horizontal part of the support plate 8. The left and right sides of the esterification tower 1 are both fixed with guide rails 17 along the left and right directions. An electric slider 18 is slidably mounted on the guide rails 17. A second hydraulic cylinder 19 is fixed on the top of the electric slider 18. The piston rod of the second hydraulic cylinder 19 faces upward and is fixedly connected to a lifting seat 20. A motor 21 is built into the center of the lifting seat 20. The output shaft of the motor 21 extends upward out of the lifting seat 20 and is fixedly connected to a pressure plate 22. Positioning grooves 23 are opened on the left and right sides of the top of the lifting seat 20. The lifting seat 20 can abut against the horizontal part of the support plate 8. Two positioning blocks 16 correspond to two positioning grooves 23 and are inserted into each other. The pressure plate 22 can pass through the through groove 15 to the upper surface of the horizontal part of the support plate 8 and abut against the upper surface of the horizontal part of the support plate 8 after rotating 90 degrees.

[0025] During continuous esterification production, phosgene enters the lower part of esterification tower 1 through raw material gas delivery pipeline 3 and flows from bottom to top, while alcohol raw materials enter the upper part of esterification tower 1 through raw material liquid delivery pipeline 2 and flow from top to bottom. This causes phosgene and alcohol materials to come into countercurrent contact at the packing material 10 in each layer of packing mesh box 9, thereby undergoing an esterification reaction to generate chloroformate chemical products, which are collected at the bottom of the esterification tower. Excess raw material liquid is discharged to the subsequent process through tail liquid discharge pipeline 4, and tail gas is discharged to the subsequent process through tail gas discharge pipeline 5. When the packing material malfunctions and needs to be replaced, the original packing mesh box 9 can be removed from bottom to top while the machine is stopped. The specific operation is as follows: first, run the electric slider 18 to drive the second hydraulic cylinder 19 and the lifting seat 20 to move towards the esterification tower 1 as a whole until the lifting seat 20 is moved below the support plate 8 on the same side. Then, the second hydraulic cylinder 19 is operated, causing its piston rod to extend, which in turn moves the lifting seat 20 upward until it presses against the bottom of the horizontal portion of the corresponding support plate 8. At this point, the positioning block 16 on the corresponding support plate 8 can be inserted into the corresponding positioning groove 23, and the pressure plate 22 can pass through the through groove 15 on the corresponding support plate 8 to the top of the horizontal portion of the corresponding support plate 8. Next, the motor 21 is operated, causing the pressure plate 22 to rotate 90 degrees, which presses the pressure plate 22 against the upper surface of the horizontal portion of the support plate 8, thereby completing the fixed connection between the lifting seat 20 and the support plate 8. Next, operate the first hydraulic cylinder 12 corresponding to the support plate 8, causing its piston rod to retract and move the limit plate 13 upward until the insertion rod 14 is completely pulled out, thus releasing the insertion limit on the vertical part of the support plate 8. Then, operate the electric slider 18, causing it to move the lifting seat 20 away from the esterification tower 1, thus moving the corresponding support plate 8 and the packing mesh box 9 away from the esterification tower 1, until the packing mesh box 9 is completely pulled out of the esterification tower 1, thus completing the disassembly of the corresponding packing mesh box 9. Then, operate the second hydraulic cylinder 19 again, causing its piston rod to retract, thus moving the lifting seat 20 and the disassembled packing mesh box 9 downward to a suitable height. Then, start the motor 21, causing the pressure plate 22 to rotate 90 degrees, thus releasing the clamping limit on the horizontal part of the support plate 8. Finally, remove the support plate 8 from the lifting seat 20. Afterwards, the other sets of packing mesh boxes 9 can be removed by following the steps described above. The cooperation of the left and right guide rails 17, electric sliders 18, second hydraulic cylinders 19 and lifting seats 20 allows the packing mesh boxes 9 to be removed from both sides of the esterification tower 1 at the same time, which is more efficient and practical.

[0026] When installing a new packing mesh box 9, it can be installed sequentially from top to bottom. The specific operation is as follows: First, fix the support plate 8 corresponding to the new packing mesh box 9 onto the lifting seat 20 according to the aforementioned steps. Then, operate the corresponding second hydraulic cylinder 19 to extend its piston rod, which will move the lifting seat 20 and the corresponding packing mesh box 9 upwards to the height of the corresponding through slot 6. Next, operate the corresponding electric slider 18 to move the corresponding lifting seat 20 and the packing mesh box 9 towards the esterification tower 1, allowing the packing mesh box 9 to pass through the corresponding through slot 6 and extend into the esterification tower 1 until it is inserted into the corresponding blind slot 7. At this point, the vertical part of the support plate 8 can press against the outer wall of the esterification tower 1. Then, operate the corresponding first hydraulic cylinder 12 to extend its piston rod, which will move the corresponding limiting plate 13 downwards until the limiting plate 13 presses against the top of the vertical part of the corresponding support plate 8, allowing the insertion rod 14 to be inserted into the corresponding blind hole 11, thus achieving the insertion and fixing installation of the support plate 8. Next, disconnect the lifting seat 20 from the corresponding support plate 8 as described above, allowing the lifting seat 20 to return to its original position. Then, continue installing the other sets of packing mesh boxes 9 as described above. They can also be installed simultaneously from top to bottom on both sides, resulting in higher installation efficiency and greater practicality. This allows for flexible and convenient disassembly and replacement of the multi-layer packing mesh boxes 9, making overall use more flexible and convenient, more conducive to continuous esterification reactions, and more practical.

[0027] In this embodiment, both the through groove 6 and the blind groove 7 are adapted to the packing mesh box 9 to ensure that the packing mesh box 9 can be smoothly installed in the esterification tower 1.

[0028] In this embodiment, the insertion rod 14 is adapted to the corresponding blind hole 11 to ensure that the insertion rod 14 can be smoothly inserted into the corresponding blind hole 11, thereby achieving the insertion and limiting installation of the support plate 8.

[0029] In this embodiment, the positioning block 16 is adapted to the corresponding positioning groove 23 to ensure that the positioning block 16 can be smoothly inserted into the corresponding positioning groove 23, thereby achieving the positioning and installation between the support plate 8 and the lifting seat 20, so that the lifting seat 20 can smoothly drive the support plate 8 and the filling mesh box 9 to move and lift as a whole.

[0030] In this embodiment, the cross-sectional area of ​​the through groove 15 is larger than the cross-sectional area of ​​the pressure plate 22 to ensure that the pressure plate 22 can pass smoothly through the through groove 15.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A continuous esterification apparatus for producing a chemical product, comprising an esterification column, a raw material liquid delivery line being connected to an upper portion of the esterification column, a raw material gas delivery line being connected to a lower portion of the esterification column, a tail liquid discharge line being connected to a bottom portion of the esterification column, and a tail gas discharge line being connected to a top portion of the esterification column, characterized in that, The cross section of the esterification tower is square, and a plurality of square through grooves are formed in the left and right side walls of the esterification tower between the raw material liquid conveying pipeline and the raw material gas conveying pipeline, the through grooves are staggered and distributed in an upper and lower manner, square blind grooves are formed in the opposite inner side walls of the esterification tower of each through groove, L-shaped support plates are arranged at the outer side walls of the esterification tower corresponding to each through groove, the vertical part of the support plate abuts against the outer side wall of the esterification tower, a filler net box is fixedly arranged on the side of the vertical part away from the horizontal part, the filler net box contains fillers and extends into the esterification tower through the corresponding through groove and is inserted into the corresponding blind groove, a plurality of blind holes are formed in the top of the vertical part of the support plate and are distributed in a front and back direction, a first hydraulic cylinder is fixedly arranged on the outer side wall of the esterification tower above the support plate in a vertical manner, the piston rod of the first hydraulic cylinder faces downward and is fixedly connected with a limiting plate, a plurality of insertion rods are fixedly arranged on the bottom of the limiting plate, the limiting plate abuts against the top of the vertical part of the adjacent support plate, the insertion rods correspond to the blind holes on the adjacent support plate one by one and are inserted into the blind holes, a through groove is formed in the middle of the horizontal part of the support plate, positioning blocks are fixedly arranged on the left and right sides of the bottom of the horizontal part of the support plate, guide rails are fixedly arranged on the left and right sides of the esterification tower in a left and right direction, electric sliding blocks are slidably arranged on the guide rails, a second hydraulic cylinder is fixedly arranged on the top of the electric sliding block, the piston rod of the second hydraulic cylinder faces upward and is fixedly connected with a lifting seat, an electric motor is arranged in the center of the lifting seat, the output shaft of the electric motor extends out of the lifting seat and is fixedly connected with a pressing plate, positioning grooves are formed in the left and right sides of the top of the lifting seat, the lifting seat can abut against the horizontal part of the support plate, the two positioning blocks correspond to the two positioning grooves one by one and are inserted into the two positioning grooves, and the pressing plate can pass through the through groove to the upper surface of the horizontal part of the support plate and abut against the upper surface of the horizontal part of the support plate after being rotated by 90 degrees.

2. The continuous esterification reaction apparatus for chemical product production according to claim 1, characterized by, The through groove and the blind groove are matched with the filler net box.

3. The continuous esterification reaction apparatus for chemical product production according to claim 1, characterized by, The insertion rod is matched with the corresponding blind hole.

4. The continuous esterification reaction apparatus for chemical product production according to claim 1, characterized by, The positioning block is matched with the corresponding positioning groove.

5. The continuous esterification reaction apparatus for chemical product production according to claim 1, wherein The cross-sectional area of the through groove is greater than the cross-sectional area of the pressing plate. The cross-sectional area of the through groove is greater than the cross-sectional area of the pressing plate.

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