Tail gas treatment device and treatment method for chemical raw material esterification production line

Abstract

The invention discloses a tail gas treatment device and method for a chemical raw material esterification production line, and relates to the technical field of tail gas treatment.The tail gas treatment device comprises a bottom plate and a water tank fixedly arranged on the upper surface of the bottom plate, and cooling water needed by high-temperature tail gas treatment can be stored by arranging the water tank; and the cooling cylinder is located over the water tank, a communicating mechanism used for cooling tail gas is arranged at the position of an inner cavity of the cooling cylinder, and by arranging the cooling cylinder, a closed cavity space can be provided for the cooling and condensing process of the high-temperature tail gas. By arranging the communicating mechanism, high-temperature tail gas generated by the chemical raw material esterification production line can be guided and divided into multiple strands, so that the contact area of the high-temperature tail gas and cooling water in the inner cavity of the cooling cylinder can be increased, and the effect of rapidly cooling and condensing the high-temperature tail gas generated by the chemical raw material esterification production line is achieved; and the effects of fully cooling the high-temperature tail gas generated by the chemical raw material esterification production line and recovering the condensed esters are achieved.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas treatment technology, specifically to an exhaust gas treatment device and treatment method for a chemical raw material esterification production line. Background Technology

[0002] In chemical raw material esterification production lines, tail gas containing esters is one of the main sources of waste gas. Besides the volatile components of the target ester products (such as ethyl acetate and phthalates), it usually also contains unreacted alcohols, organic acid monomers, and by-reaction products such as ethers, aldehydes, and ketones, forming a complex mixture characterized primarily by volatile organic compounds (VOCs). For this type of tail gas, a standardized and systematic treatment plan must be adopted. Conventional processes follow the principle of "source control and graded purification": firstly, high concentrations of esters and alcohols are effectively condensed into liquids and recovered through deep condensation or cryogenic recovery technology, reducing the load on subsequent treatment and achieving resource reuse.

[0003] In the treatment process of ester-containing tail gas from chemical raw material esterification production lines, insufficient efficiency, improper operation, or incorrect selection of the front-end condensation unit can lead to incomplete condensation of ester components, resulting in a series of adverse consequences. The direct impact is the significant loss of valuable ester and alcohol raw materials, which, due to ineffective recovery, leads to increased material consumption and directly raises production costs. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a tail gas treatment device for a chemical raw material esterification production line, comprising a base plate and a water tank fixed on the upper surface of the base plate. By setting the water tank, cooling water required for high-temperature tail gas treatment can be stored. A cooling cylinder is located directly above the water tank. The inner cavity of the cooling cylinder is equipped with a connecting mechanism for cooling exhaust gas. By including the cooling cylinder, a sealed cavity space can be provided for the cooling and condensation process of the high-temperature exhaust gas. The connecting mechanism can guide the high-temperature exhaust gas generated by the chemical raw material esterification production line, dividing it into multiple streams. This increases the contact area with the cooling water inside the cooling cylinder, achieving rapid cooling and condensation of the high-temperature exhaust gas generated by the chemical raw material esterification production line. A vibration mechanism is used to accelerate the outflow of condensed esters in the inner cavity of the cooling cylinder. The vibration mechanism penetrates the upper surface of the water tank. By setting the vibration mechanism, periodic or continuous mechanical vibration can be applied to the cooling cylinder and its internal components, which can effectively break the adhesion of the condensate film on the cooling surface, reduce the liquid flow resistance, and thus significantly improve the collection efficiency and discharge speed of condensed esters, preventing them from accumulating inside the equipment. The discharge mechanism is used to discharge condensed esters in the inner cavity of the connecting mechanism. The discharge mechanism is set in the inner cavity of the cooling cylinder. By setting the discharge mechanism, an active and continuous material conveying mechanism is provided, which can efficiently and thoroughly discharge the liquid ester products deposited in the inner cavity of the connecting mechanism after cooling and condensation from the system. This not only ensures the continuous operation capability of the connecting mechanism, but also facilitates the recycling of condensed products. A connecting box extends through the bottom of the water tank's outer surface, and a water pump extends through the upper surface of the connecting box. The water pump's drain end is located directly above. By setting up the connecting box and the water pump, they together constitute the power core and flow hub of the device's cooling water circulation system. The water pump is responsible for providing the necessary fluid transport power, while the connecting box allows cooling water in the water tank's inner cavity to flow into its inner cavity. Then, when the water pump generates power, the cooling water in the connecting box's inner cavity is extracted. The connecting mechanism includes a first partition and a second partition. The first partition is welded to the side of the inner wall of the cooling cylinder, and the second partition is located on the side of the inner wall of the cooling cylinder away from the first partition. A connecting pipe runs through the opposite surfaces of the first and second partitions. There are several connecting pipes, and they are evenly distributed. By setting the first partition, the second partition, and the evenly distributed multiple connecting pipes, an optimized exhaust gas channel is formed inside the cooling cylinder, which forces the exhaust gas to be distributed into multiple streams, greatly increasing the effective heat exchange area. At the same time, it also ensures sufficient cooling and condensation effect by extending the exhaust gas residence time. This multi-pipe parallel structure helps to balance the airflow distribution and reduce pressure drop.

[0005] Preferably, the upper surface of the cooling cylinder has a water inlet on the side near the first partition, the lower surface of the cooling cylinder has a water outlet on the side near the second partition, the drain end of the water pump is fixed with a hose, the end of the hose away from the water pump is fixed at the opening of the water inlet, and the upper surface of the water tank has a connecting hole.

[0006] Preferably, the communication mechanism further includes an air intake shroud, which is welded to the opening of the cooling cylinder and communicates with the inner cavity of the communication pipe. A limit ring passes through the lower surface of the air intake shroud, and a rotating shell is rotatably connected to the inner cavity of the limit ring. A screen is welded to the bottom of the inner wall of the rotating shell, and a communication column is welded to the lower surface of the rotating shell. An air intake pipe is welded to the bottom end of the communication column, and a connecting frame is welded to the outer surface of the air intake pipe. The connecting frame is welded to the upper surface of the water tank.

[0007] Preferably, the connecting mechanism further includes three third partitions, which, together with the first and second partitions, divide the space into four areas. The outer surface of each third partition has water-permeable holes, and a flow guide is welded to each water-permeable hole. The water-permeable hole on the outer surface of the leftmost third partition is located at the bottom, the water-permeable hole on the outer surface of the middle third partition is located at the top, and the water-permeable hole on the outer surface of the rightmost third partition is located at the bottom.

[0008] Preferably, a rolling bearing is welded to the inner ring of the third partition, a first rotating rod is fixed to the inner ring of the rolling bearing, a hexagonal tube is welded to the end of the first rotating rod, a support frame is welded to the outer surface of the first rotating rod, and a spiral blade is welded to the end of the support frame.

[0009] Preferably, the vibration mechanism includes a base box, which is welded to a connecting hole on the upper surface of the water tank. A telescopic tube is fixed to the upper surface of the base box, and a sliding frame is welded to the top of the telescopic tube. A movable box is welded to the inner ring of the sliding frame, and the movable box is welded to the bottom of the water outlet. A spring is welded to the lower surface of the sliding frame, and the bottom end of the spring is welded to the upper surface of the base box.

[0010] Preferably, a vent plate is welded to the bottom of the inner wall of the mobile box, a support rod is welded to the lower surface of the vent plate, a blocking block is welded to the bottom end of the support rod, and a sealing ring is fixed to the outer surface of the blocking block. The sealing ring is squeezed and adapted to the inner wall of the bottom box.

[0011] Preferably, an exhaust hood is welded to the end of the cooling cylinder, an exhaust pipe extends through the upper surface of the exhaust hood, a connecting groove is provided at the end of the exhaust hood away from the cooling cylinder, the discharge mechanism includes a discharge box, the discharge box is movably connected to the connecting groove at the end of the exhaust hood, an external threaded pipe extends through the lower surface of the discharge box, a collection box is threadedly connected to the outer surface of the external threaded pipe, a support plate is welded to the outer surface of the discharge box, a stepper motor is fixedly mounted at the end of the support plate, a second rotating rod is mounted on the output end of the stepper motor via a coupling, a hexagonal prism is welded to the end of the second rotating rod, the hexagonal prism is engaged in the inner cavity of the hexagonal tube, and a first gear is welded to the outer surface of the second rotating rod.

[0012] Preferably, a third rotating rod passes through the inner cavity of the discharge box. A second gear is welded to one end of the third rotating rod on the outer surface of the discharge box. The second gear meshes with a first gear. A helical rod is welded to the end of the third rotating rod away from the second gear. The helical rod is frictionally adapted to the inner wall of the connecting pipe. A fourth rotating rod is welded to the end of the helical rod away from the third rotating rod. A limiting frame is rotatably connected to the outer surface of the fourth rotating rod. The outer surface of the limiting frame has several material-penetrating holes. The limiting frame is adapted to the inner wall of the connecting pipe.

[0013] A method for treating tail gas from a chemical raw material esterification production line includes the following steps: Step 1: The high-temperature exhaust gas generated by the esterification production line is introduced into the device. The exhaust gas is first dispersed and buffered at the front end of the connecting mechanism to achieve uniform airflow distribution. Then the exhaust gas enters the inner cavity of the cooling cylinder. Step Two: Within the cooling cylinder's inner cavity, the exhaust gas is separated by the first and second baffles and flows in a meandering manner through several evenly distributed connecting pipes. Simultaneously, a water pump is activated, pumping cooling water from the water tank into the cooling cylinder's jacket or specific flow channels. Guided by the connecting mechanism, the water flows in an "S"-shaped path, forming an efficient heat exchange with the exhaust gas flow. During this process, the ester vapors in the exhaust gas are fully cooled and liquefied into liquid esters. Step 3: The condensed liquid ester accumulates at the bottom of the connecting pipe. The discharge mechanism is then activated, which pushes and transports the condensed ester adhering to the pipe wall and deposited at the bottom to the discharge position. Finally, the condensed ester is centrally recovered by disassembling the collection area. Step 4: During the cooling process, the vibration mechanism works synchronously. The pressure fluctuations generated by the flow of cooling water or the operation of the system act on the vibration mechanism, pushing it to move downwards periodically. This continuous up-and-down vibration is transmitted to the entire cooling cylinder, shaking off the condensed ester adhering to the inner wall and connecting pipes, preventing blockage, and accelerating its flow to the discharge mechanism.

[0014] This invention provides a tail gas treatment device and method for a chemical raw material esterification production line. It has the following beneficial effects: I. The tail gas treatment device and method for this chemical raw material esterification production line, by setting up a cooling cylinder, provides a sealed cavity space for the cooling and condensation process of the high-temperature tail gas. By setting up a connecting mechanism, the high-temperature tail gas generated by the chemical raw material esterification production line can be guided, causing the high-temperature tail gas to be divided into multiple streams, thereby increasing the contact area with the cooling water in the inner cavity of the cooling cylinder, achieving the effect of rapid cooling and condensation of the high-temperature tail gas generated by the chemical raw material esterification production line.

[0015] II. The tail gas treatment device and treatment method for the chemical raw material esterification production line, by setting up a vibration mechanism, can apply periodic or continuous mechanical vibration to the cooling cylinder and its internal components, effectively destroy the adhesion of the condensate film on the cooling surface, reduce the liquid flow resistance, thereby significantly improving the collection efficiency and discharge speed of condensed esters, and preventing them from accumulating inside the equipment.

[0016] III. The tail gas treatment device and method for this chemical raw material esterification production line, through the setting of a discharge mechanism, provides an active and continuous material conveying mechanism. This mechanism efficiently and thoroughly discharges liquid ester products that have been cooled and condensed and deposited inside the connecting mechanism, ensuring the continuous operation of the connecting mechanism and facilitating the recycling of condensed products. During the cooling process, the vibration mechanism works synchronously. When cooling water enters the moving box and the inner cavity of the telescopic pipe through the outlet, the telescopic pipe expands as the water accumulates, causing the moving box to move upwards. The blockage block and sealing ring no longer contact the inner wall of the bottom box, allowing the water to flow through the bottom box into the inner cavity of the water tank, thus completing the water flow. Subsequently, under the action of the spring reset, the water quickly returns to its original position. This continuous up-and-down vibration is transmitted to the entire cooling cylinder through the moving box and sliding frame, shaking off the condensed ester adhering to the inner wall and connecting pipe, preventing blockage, and accelerating its flow to the discharge mechanism. Finally, the residual gas, after cooling and purification, is safely discharged from the system through the exhaust pipe at the top of the exhaust hood.

[0017] IV. The tail gas treatment device and treatment method for the chemical raw material esterification production line, by setting up a connecting box and a water pump, together constitute the power core and circulation hub of the device's cooling water circulation system. The water pump is responsible for providing the necessary fluid transport power, while the connecting box allows the cooling water in the water tank's inner cavity to flow into its inner cavity, and then when the water pump generates power, the cooling water in the connecting box's inner cavity is extracted.

[0018] V. The tail gas treatment device and method for this chemical raw material esterification production line utilizes three third baffles and staggered water permeable holes and flow guides at specific locations. A multi-pass, deflected cooling water flow channel is meticulously designed within the jacket of the cooling cylinder. This serpentine flow path forces the cooling water to undergo thorough and efficient counter-current or cross-flow heat exchange with the connecting pipe containing the high-temperature tail gas, maximizing cooling efficiency. The flow guides optimize the water flow pattern, reduce dead zones and local resistance, and ensure uniform cooling. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of a tail gas treatment device for a chemical raw material esterification production line according to the present invention. Figure 2 This is a side view of the structure of a tail gas treatment device for a chemical raw material esterification production line according to the present invention. Figure 3 This is a cross-sectional structural schematic diagram of a tail gas treatment device for a chemical raw material esterification production line according to the present invention. Figure 4 This is a schematic diagram of the connecting mechanism structure of the present invention; Figure 5 This is a schematic cross-sectional view of the communication mechanism of the present invention; Figure 6 This is a partial structural diagram of the connecting mechanism of the present invention; Figure 7 This is a schematic diagram of the third partition structure of the present invention; Figure 8 This is a schematic diagram of the vibration mechanism structure of the present invention; Figure 9 This is a schematic diagram of the material discharge mechanism of the present invention; Figure 10 This is a schematic cross-sectional view of the material discharge mechanism of the present invention; Figure 11 For the present invention Figure 10 Enlarged schematic diagram of structure A in the middle.

[0020] In the diagram: 1. Base plate; 2. Water tank; 3. Connecting frame; 4. Cooling cylinder; 5. Connecting mechanism; 51. Air intake hood; 52. Limiting ring; 53. Rotating shell; 54. Connecting column; 55. Screen; 56. Air intake pipe; 57. First partition; 58. Second partition; 59. Connecting pipe; 510. Third partition; 511. Flow guide; 512. Exhaust hood; 513. Connecting groove; 514. Exhaust pipe; 515. First rotating rod; 516. Hexagonal tube; 517. Rolling bearing; 518. Support frame; 519. Spiral blade; 6. Vibration mechanism; 61. Base box; 62. Telescopic tube; 63. Sliding frame; 64. Moving box; 65. Ventilation plate; 66. Support rod; 67. Blocking block; 68. Sealing ring; 69. Spring; 7. Connecting hole; 8. Discharging mechanism; 81. Discharging box; 82. Support plate; 83. Stepper motor; 84. Second rotating rod; 85. Hexagonal prism; 86. First gear; 87. Third rotating rod; 88. Second gear; 89. Helical rod; 810. Fourth rotating rod; 811. Limiting frame; 812. Externally threaded tube; 813. Collection box; 9. Connecting box; 10. Water pump; 11. Hose; 12. Inlet; 13. Outlet. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0022] like Figures 1-11 As shown, the present invention provides a technical solution: a tail gas treatment device for a chemical raw material esterification production line, including a base plate 1 and a water tank 2 fixed on the upper surface of the base plate 1. By setting the water tank 2, cooling water required for high-temperature tail gas treatment can be stored. The cooling cylinder 4 is located directly above the water tank 2. An internal communication mechanism 5 for cooling exhaust gas is installed in the inner cavity of the cooling cylinder 4. By installing the cooling cylinder 4, a sealed cavity space is provided for the cooling and condensation process of the high-temperature exhaust gas. The communication mechanism 5 guides the high-temperature exhaust gas generated by the chemical raw material esterification production line, dividing it into multiple streams. This increases the contact area with the cooling water inside the cooling cylinder 4, achieving rapid cooling and condensation of the high-temperature exhaust gas generated by the chemical raw material esterification production line. Vibration mechanism 6 is used to accelerate the outflow of condensed esters in the inner cavity of cooling cylinder 4. Vibration mechanism 6 penetrates the upper surface of water tank 2. By setting vibration mechanism 6, periodic or continuous mechanical vibration can be applied to cooling cylinder 4 and its internal components, effectively destroying the adhesion of condensate film on the cooling surface, reducing liquid flow resistance, thereby significantly improving the collection efficiency and discharge speed of condensed esters, and preventing them from accumulating inside the equipment. The discharge mechanism 8 is used to discharge the condensed esters in the inner cavity of the connecting mechanism 5. The discharge mechanism 8 is set in the inner cavity of the cooling cylinder 4. By setting the discharge mechanism 8, an active and continuous material conveying mechanism is provided, which can efficiently and thoroughly discharge the liquid ester products deposited in the connecting mechanism 5 after cooling and condensation from the system. This not only ensures the continuous operation capability of the connecting mechanism 5, but also facilitates the recycling of the condensed products. The connecting box 9 penetrates the bottom of the outer surface of the water tank 2, and the water pump 10 penetrates the upper surface of the connecting box 9. The drain end of the water pump 10 is located directly above. By setting up the connecting box 9 and the water pump 10, they together constitute the power core and circulation hub of the device's cooling water circulation system. The water pump 10 is responsible for providing the necessary fluid transport power, while the connecting box 9 allows the cooling water in the inner cavity of the water tank 2 to flow into its inner cavity. Then, when the water pump 10 generates power, the cooling water in the inner cavity of the connecting box 9 is extracted. The connecting mechanism 5 includes a first partition 57 and a second partition 58. The first partition 57 is welded to the side of the inner wall of the cooling cylinder 4, and the second partition 58 is located on the side of the inner wall of the cooling cylinder 4 away from the first partition 57. A connecting pipe 59 runs through the opposite surfaces of the first partition 57 and the second partition 58. There are several connecting pipes 59, and they are evenly distributed. By setting the first partition 57, the second partition 58, and the evenly distributed multiple connecting pipes 59, an optimized exhaust gas channel is formed inside the cooling cylinder 4, which forces the exhaust gas to be distributed into multiple streams, greatly increasing the effective heat exchange area. At the same time, it also ensures sufficient cooling and condensation effect by extending the residence time of the exhaust gas. This multi-pipe parallel structure helps to balance the airflow distribution and reduce pressure drop.

[0023] A water inlet 12 is provided on the upper surface of the cooling cylinder 4 near the first partition 57, and a water outlet 13 is provided on the lower surface of the cooling cylinder 4 near the second partition 58. A flexible hose 11 is fixed to the drain end of the water pump 10, and the end of the flexible hose 11 away from the water pump 10 is fixed to the opening of the water inlet 12. A connecting hole 7 is provided on the upper surface of the water tank 2. By setting the water inlet 12, the water outlet 13, the flexible hose 11 and the connecting hole 7, a complete closed loop path of cooling water is precisely planned, from being pumped out of the water tank 2, entering the jacket of the cooling cylinder 4 for heat absorption, and finally returning to the water tank 2 for heat dissipation. By setting the flexible hose 11, displacement that may be caused by the vibration of the vibration mechanism 6 is avoided, ensuring the reliability and sealing of the pipeline connection. The connecting hole 7 provides an interface for the vibration mechanism 6 to be installed on the upper surface of the water tank 2 and maintains the integrity of the system structure.

[0024] The connecting mechanism 5 also includes an air intake hood 51, which is welded to the opening of the cooling cylinder 4. The air intake hood 51 is connected to the inner cavity of the connecting pipe 59. A limit ring 52 passes through the lower surface of the air intake hood 51. A rotating shell 53 is rotatably connected to the inner cavity of the limit ring 52. A screen 55 is welded to the bottom of the inner wall of the rotating shell 53. A connecting column 54 is welded to the lower surface of the rotating shell 53. An air intake pipe 56 is welded to the bottom end of the connecting column 54. A connecting frame 3 is welded to the outer surface of the air intake pipe 56. The connecting frame 3 is welded to the water... The upper surface of box 2, through the installation of an air inlet hood 51, a limiting ring 52, a rotating shell 53, a screen 55, a connecting column 54, an air inlet pipe 56, and a connecting frame 3, constitutes a fully functional exhaust gas introduction system: the air inlet hood 51 achieves preliminary collection and guidance of exhaust gas; the rotatable rotating shell 53, in conjunction with the limiting ring 52, effectively absorbs and compensates for the stress generated by thermal expansion and contraction or vibration of the pipeline, protecting equipment safety; the screen 55 plays a crucial pretreatment role, filtering and intercepting solid particles or droplets entrained in the exhaust gas, preventing... To prevent blockage of subsequent pipelines and equipment; the connecting frame 3 can support the air intake pipe 56, and the connecting mechanism 5 also includes a third partition 510. There are three third partitions 510, and the three third partitions 510 divide the first partition 57 and the second partition 58 into four spaces. The outer surface of the third partition 510 is provided with water permeable holes, and a guide shroud 511 is welded to the water permeable holes on the outer surface of the third partition 510. The water permeable hole on the outer surface of the leftmost third partition 510 is located at the bottom, and the one in the middle... The water-permeable holes on the outer surface of the third baffle 510 are located at the top, while the water-permeable holes on the outer surface of the rightmost third baffle 510 are located at the bottom. By setting up three third baffles 510 and their staggered water-permeable holes and flow guide shrouds 511, a multi-pass baffle cooling water flow channel is carefully designed within the jacket of the cooling cylinder 4. This serpentine flow path forces the cooling water to undergo sufficient and efficient counter-current or cross-flow heat exchange with the connecting pipe 59 where the high-temperature exhaust gas is located, maximizing cooling efficiency. The flow guide shroud 511 optimizes the water flow pattern, reduces flow dead zones and local resistance, and ensures uniform cooling.

[0025] A rolling bearing 517 is welded to the inner ring of the third partition 510. A first rotating rod 515 is fixed to the inner ring of the rolling bearing 517. A hexagonal tube 516 is welded to the end of the first rotating rod 515. A support frame 518 is welded to the outer surface of the first rotating rod 515. A spiral blade 519 is welded to the end of the support frame 518. By setting up the rolling bearing 517, the first rotating rod 515, the hexagonal tube 516, the support frame 518, and the spiral blade 519, a dynamic stirring and conveying unit is created inside the connecting pipe 59: the rotating spiral blade 519 disturbs the exhaust gas in the pipe, enhances the heat and mass transfer process between gas and liquid and gas and solid, and improves the condensation efficiency.

[0026] The vibration mechanism 6 includes a base box 61, which is welded to a connecting hole 7 on the upper surface of the water tank 2. A telescopic tube 62 is fixed to the upper surface of the base box 61, and a sliding frame 63 is welded to the top of the telescopic tube 62. A movable box 64 is welded to the inner ring of the sliding frame 63 and is welded to the bottom of the outlet 13. A spring 69 is welded to the lower surface of the sliding frame 63, and the bottom of the spring 69 is welded to the upper surface of the base box 61. By setting up the base box 61, telescopic tube 62, sliding frame 63, movable box 64, and spring 69, a highly efficient mechanical vibration generation and transmission system is constructed: the spring 69 provides elastic support and vibration restoring force, allowing the sliding frame 63 and its connected movable box 64, cooling cylinder 4 outlet 13, and other components to vibrate freely in the vertical direction; the telescopic tube 62 ensures the sealing and flexibility of the cooling water outlet pipe connection during vibration, ensuring effective vibration transmission without leakage. When the water inlet 13 enters the inner cavity of the moving box 64 and the telescopic pipe 62, the telescopic pipe 62 expands as water accumulates, causing the moving box 64 to move upward. A vent plate 65 is welded to the bottom of the inner wall of the moving box 64, and a support rod 66 is welded to the lower surface of the vent plate 65. A blocking block 67 is welded to the bottom end of the support rod 66, and a sealing ring 68 is fixed to the outer surface of the blocking block 67. The sealing ring 68 is squeezed and fitted to the inner wall of the bottom box 61. By setting up the vent plate 65, the support rod 66, the blocking block 67, and the sealing ring 68, the flow energy of the cooling water is converted into mechanical vibration using the principle of fluid dynamics. The outflowing cooling water impacts the vent plate 65, generating pressure fluctuations, which push the support rod 66 and the blocking block 67 to move up and down periodically, breaking the sealing state between the sealing ring 68 and the inner wall of the bottom box 61, thereby causing rapid changes in the pressure within the system and generating continuous self-excited vibration. Efficient descaling and drainage assistance can be achieved without an additional power source. Simultaneously, as water accumulates and the telescopic tube 62 expands, causing the movable box 64 to move upward, the blocking block 67 and the sealing ring 68 no longer contact the inner wall of the bottom box 61, thus allowing the internal water to flow through the bottom box 61 into the inner cavity of the water tank 2, thereby completing the water flow.

[0027] An exhaust hood 512 is welded to the end of the cooling cylinder 4. An exhaust pipe 514 passes through the upper surface of the exhaust hood 512. A connecting groove 513 is provided at the end of the exhaust hood 512 away from the cooling cylinder 4. The discharge mechanism 8 includes a discharge box 81, which is movably connected to the connecting groove 513 at the end of the exhaust hood 512. An external threaded pipe 812 passes through the lower surface of the discharge box 81. A collection box 813 is threadedly connected to the outer surface of the external threaded pipe 812. A support plate 82 is welded to the outer surface of the discharge box 81. A stepper motor 83 is fixedly mounted at the end of the support plate 82. A second rotating rod 84 is mounted on the output end of the stepper motor 83 via a coupling. A hexagonal prism 8 is welded to the end of the second rotating rod 84. 5. The hexagonal prism 85 is fitted into the inner cavity of the hexagonal tube 516. The outer surface of the second rotating rod 84 is welded with the first gear 86. By setting up an exhaust hood 512, an exhaust pipe 514, a discharge box 81, an external threaded pipe 812, a collection box 813, a support plate 82, a stepper motor 83, the second rotating rod 84, the hexagonal prism 85, and the first gear 86, an integrated design of exhaust gas emission, power transmission, and product collection is realized: the exhaust hood 512 and the exhaust pipe 514 are responsible for safely exporting the cooled and compliant exhaust gas; the stepper motor 83 serves as the drive source, and its power is remotely driven by the spiral inside the connecting pipe 59 through the insertion and cooperation of the second rotating rod 84 and the hexagonal prism 85 with the hexagonal tube 516. The rotation of plate 519 agitates the cooling water in the inner cavity of cooling cylinder 4, thereby accelerating the flow of cooling water. Simultaneously, the first gear 86 distributes power to the discharge mechanism 8. The threaded collection box 813 facilitates the periodic disassembly and cleaning of condensed products, improving operational convenience. A third rotating rod 87 passes through the inner cavity of the discharge box 81. A second gear 88 is welded to one end of the third rotating rod 87 on the outer surface of the discharge box 81, meshing with the first gear 86. A spiral rod 89 is welded to the end of the third rotating rod 87 away from the second gear 88, frictionally engaging with the inner wall of the connecting pipe 59. The end of the spiral rod 89 away from the third rotating rod 87... A fourth rotating rod 810 is welded on, and a limiting frame 811 is rotatably connected to the outer surface of the fourth rotating rod 810. The outer surface of the limiting frame 811 has several material passage holes. The limiting frame 811 is adapted to the inner wall of the connecting pipe 59. By setting the third rotating rod 87, the second gear 88, the screw rod 89, the fourth rotating rod 810 and the limiting frame 811, a highly efficient and reliable mechanical material discharge system is formed: the power of the stepper motor 83 is precisely transmitted to the screw rod 89 through the meshing of the first gear 86 and the second gear 88; the rotating screw rod 89 penetrates into the interior of the connecting pipe 59, and like a screw conveyor, continuously scrapes and pushes the viscous condensed ester deposited at the bottom of the pipe towards the discharge box 81;The limiting frame 811 provides radial support for the fourth rotating rod 810, ensuring smooth operation of the screw rod 89. Its through-hole allows liquid to pass smoothly into the discharge box 81, while solid particles are effectively intercepted, achieving initial liquid-solid separation and ensuring smooth discharge and the purity of the recovered product.

[0028] A method for treating tail gas from a chemical raw material esterification production line includes the following steps: Step 1: The high-temperature exhaust gas generated by the esterification production line is introduced into the device. The exhaust gas is first dispersed and buffered at the front end of the connecting mechanism 5 to achieve uniform airflow distribution. Then the exhaust gas enters the inner cavity of the cooling cylinder 4. Step Two: Within the cooling cylinder 4, the exhaust gas is separated by the first baffle 57 and the second baffle 58, and flows in a meandering manner through several evenly distributed connecting pipes 59. Simultaneously, the water pump 10 is activated, pumping cooling water from the water tank 2 into the jacket or specific flow channel of the cooling cylinder 4. The water flows in an "S"-shaped path through the guiding mechanism 5, forming an efficient heat exchange with the exhaust gas flow direction. During this process, the ester vapors in the exhaust gas are fully cooled and liquefied into liquid esters. Step 3: The condensed liquid ester accumulates at the bottom of the connecting pipe 59. The discharge mechanism 8 is then activated. The discharge mechanism 8 pushes and transports the condensed ester adhering to the pipe wall and deposited at the bottom to the discharge position. Finally, the condensed ester is centrally recovered by disassembling the collection area. Step 4: During the cooling process, the vibration mechanism 6 works synchronously. The pressure fluctuations generated by the flow of cooling water or the operation of the system act on the vibration mechanism 6, pushing the vibration mechanism 6 to move downward periodically. This continuous up-and-down vibration is transmitted to the entire cooling cylinder 4, shaking off the condensed ester adhering to the inner wall and the connecting pipe 59, preventing blockage, and accelerating its flow to the discharge mechanism 8.

[0029] Working principle: The high-temperature exhaust gas generated by the esterification production line is introduced through the air inlet pipe 56, and enters the rotatable rotating shell 53 through the connecting column 54. The exhaust gas first impacts the screen 55 for preliminary dispersion and buffering, so as to achieve uniform airflow distribution. Then, the exhaust gas enters the inner cavity of the cooling cylinder 4 guided by the air inlet hood 51. Within the cooling cylinder 4, the exhaust gas is separated by a first baffle 57 and a second baffle 58, and flows in a meandering manner through several evenly distributed connecting pipes 59. Simultaneously, the water pump 10 is activated, pumping cooling water from the water tank 2 into the jacket or specific flow channels of the cooling cylinder 4 through hoses 11 and inlets 12. The cooling water flows in an "S"-shaped path through four spaces formed by the first baffle 57, the second baffle 58, and three third baffles 510, via alternating top and bottom guide shields 511, achieving efficient heat exchange with the exhaust gas flow. During this process, the ester vapors in the exhaust gas are fully cooled and liquefied into liquid esters. The condensed liquid ester accumulates at the bottom of the cooling cylinder 4 and the connecting pipe 59. The stepper motor 83 is activated, driving the second rotating rod 84 and the first gear 86 to rotate. The second gear 88, meshing with these gears, drives the third rotating rod 87 and the screw rod 89 to rotate. The screw rod 89 rotates within the connecting pipe 59, pushing and conveying the condensed ester adhering to the pipe wall and deposited at the bottom to the discharge box 81. Finally, it falls through the external threaded pipe 812 into the detachable collection box 813, achieving centralized recovery of the condensed ester. During the cooling process, the vibration mechanism 6 operates synchronously. When cooling water enters the inner cavity of the moving box 64 and the telescopic pipe 62 through the outlet 13, the telescopic pipe 62 expands as water accumulates, causing the moving box 64 to move upward. The blockage block 67 and the sealing ring 68 no longer contact the inner wall of the bottom box 61, allowing the water inside to flow into the inner cavity of the water tank 2 through the bottom box 61, thus completing the water flow. Subsequently, under the reset action of the spring 69, the water quickly returns to its original position. This continuous up-and-down vibration is transmitted to the entire cooling cylinder 4 through the moving box 64 and the sliding frame 63, shaking off the condensed ester adhering to the inner wall and the connecting pipe 59, preventing blockage, and accelerating its flow to the discharge mechanism 8. Finally, the residual gas after cooling and purification is safely discharged from the system through the exhaust pipe 514 at the top of the exhaust hood 512.

[0030] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A tail gas treatment device for a chemical feedstock esterification production line, characterized in that, The utility model relates to a cooling device for esterification reaction, which comprises: a base plate (1) and a water tank (2) fixed on the upper surface of the base plate (1); a cooling cylinder (4) located directly above the water tank (2), wherein the inner cavity of the cooling cylinder (4) is provided with a communication mechanism (5) for cooling exhaust gas; a vibrating mechanism (6) for accelerating the outflow of condensed esters in the inner cavity of the cooling cylinder (4), wherein the vibrating mechanism (6) penetrates the upper surface of the water tank (2); a discharging mechanism (8) for discharging the condensed esters in the inner cavity of the communication mechanism (5), wherein the discharging mechanism (8) is arranged at the inner cavity of the cooling cylinder (4); a communication tank (9) penetrating the bottom of the outer surface of the water tank (2), wherein the upper surface of the communication tank (9) is penetrated by a water pump (10), and the water discharge end of the water pump (10) is located directly above; the communication mechanism (5) comprises a first partition plate (57) and a second partition plate (58), wherein the first partition plate (57) is welded at the side of the inner wall of the cooling cylinder (4), the second partition plate (58) is located at the side of the inner wall of the cooling cylinder (4) away from the first partition plate (57), and a plurality of communication pipes (59) are arranged between the opposite surfaces of the first partition plate (57) and the second partition plate (58).

2. The tail gas treatment device for a chemical raw material esterification production line according to claim 1, characterized in that: an inlet (12) is arranged on the upper surface of the cooling cylinder (4) close to the side of the first partition plate (57), an outlet (13) is arranged on the lower surface of the cooling cylinder (4) close to the side of the second partition plate (58), the water discharge end of the water pump (10) is fixedly connected with a hose (11), one end of the hose (11) away from the water pump (10) is fixedly connected with the opening of the inlet (12), and a communication hole (7) is arranged on the upper surface of the water tank (2).

3. The tail gas treatment device for a chemical feedstock esterification production line according to claim 1, characterized in that: the communication mechanism (5) further comprises an air inlet cover (51) welded at the opening of the cooling cylinder (4), the air inlet cover (51) is connected with the inner cavity of the communication pipe (59), the lower surface of the air inlet cover (51) is penetrated by a limiting ring (52), the inner cavity of the limiting ring (52) is rotatably connected with a rotating shell (53), the bottom of the inner wall of the rotating shell (53) is welded with a screen (55), the lower surface of the rotating shell (53) is welded with a communication column (54), the bottom end of the communication column (54) is welded with an air inlet pipe (56), the outer surface of the air inlet pipe (56) is welded with a connecting frame (3), and the connecting frame (3) is welded on the upper surface of the water tank (2).

4. The tail gas treatment device for a chemical feedstock esterification production line according to claim 1, characterized in that: The communication mechanism (5) further comprises three third partitions (510), which divide the first partition (57) and the second partition (58) into four spaces, the outer surface of the third partition (510) is provided with a water-permeable hole, the water-permeable hole of the outer surface of the third partition (510) is welded with a flow guide cover (511), the water-permeable hole of the outer surface of the third partition (510) located at the leftmost side is located at the bottom, the water-permeable hole of the outer surface of the third partition (510) located at the middle is located at the top, and the water-permeable hole of the outer surface of the third partition (510) located at the rightmost side is located at the bottom.

5. The tail gas treatment device for a chemical feedstock esterification production line according to claim 4, characterized in that: The inner ring of the third partition (510) is welded with a rolling bearing (517), the inner ring of the rolling bearing (517) is fixedly provided with a first rotating rod (515), the end of the first rotating rod (515) is welded with a hexagonal tube (516), the outer surface of the first rotating rod (515) is welded with a support frame (518), and the end of the support frame (518) is welded with a spiral fin (519).

6. The tail gas treatment device for a chemical feedstock esterification production line according to claim 2, characterized in that: The vibration mechanism (6) comprises a bottom box (61) welded at the communication hole (7) provided on the upper surface of the water tank (2), the upper surface of the bottom box (61) is fixedly provided with an extension tube (62), the top end of the extension tube (62) is welded with a sliding frame (63), the inner ring of the sliding frame (63) is welded with a moving box (64), the moving box (64) is welded at the bottom end of the water outlet (13), the lower surface of the sliding frame (63) is welded with a spring (69), and the bottom end of the spring (69) is welded on the upper surface of the bottom box (61).

7. The tail gas treatment device for a chemical feedstock esterification production line according to claim 6, characterized in that: The bottom of the inner wall of the moving box (64) is welded with an air-permeable disc (65), the lower surface of the air-permeable disc (65) is welded with a support rod (66), the bottom end of the support rod (66) is welded with a blocking block (67), the outer surface of the blocking block (67) is fixedly provided with a sealing ring (68), and the sealing ring (68) is extruded and matched with the inner wall of the bottom box (61).

8. The tail gas treatment device for a chemical feedstock esterification production line according to claim 7, characterized in that: The end of the cooling cylinder (4) is welded with an exhaust cover (512), the upper surface of the exhaust cover (512) is penetrated with an exhaust pipe (514), the end of the exhaust cover (512) away from the cooling cylinder (4) is provided with a connecting groove (513), the discharging mechanism (8) comprises a discharging box (81), the discharging box (81) is movably connected at the connecting groove (513) provided at the end of the exhaust cover (512), the lower surface of the discharging box (81) is penetrated with an external threaded pipe (812), the outer surface of the external threaded pipe (812) is threadedly connected with a collecting box (813), the outer surface of the discharging box (81) is welded with a supporting plate (82), the end of the supporting plate (82) is fixedly provided with a stepping motor (83), the output end of the stepping motor (83) is mounted with a second rotating rod (84) through a shaft coupling, the end of the second rotating rod (84) is welded with a hexagonal prism (85), the hexagonal prism (85) is clamped at the inner cavity of a hexagonal pipe (516), and the outer surface of the second rotating rod (84) is welded with a first gear (86).

9. The tail gas treatment device for a chemical feedstock esterification production line according to claim 8, characterized in that: The inner cavity of the discharging box (81) is penetrated with a third rotating rod (87), the end of the third rotating rod (87) away from the outer surface of the discharging box (81) is welded with a second gear (88), the second gear (88) is engaged with the first gear (86), the end of the third rotating rod (87) away from the second gear (88) is welded with a spiral rod (89), the spiral rod (89) is frictionally matched with the inner wall of the communication pipe (59), the end of the spiral rod (89) away from the third rotating rod (87) is welded with a fourth rotating rod (810), and the outer surface of the fourth rotating rod (810) is rotatably connected with a limiting frame (811), the outer surface of the limiting frame (811) is provided with a plurality of material passing holes, and the limiting frame (811) is matched with the inner wall of the communication pipe (59).

10. A tail gas treatment device for an esterification production line of a chemical raw material according to any one of claims 1 to 9, characterized by a tail gas treatment method for an esterification production line of a chemical raw material, wherein The method comprises the following steps: Step one: the high-temperature tail gas generated by the esterification production line is introduced into the device, the tail gas is first subjected to preliminary dispersion and buffering through the front end of the communication mechanism (5), uniform distribution of airflow is realized, and then the tail gas enters the inner cavity of the cooling cylinder (4); Step two: the tail gas is separated by the first baffle (57) and the second baffle (58) in the inner cavity of the cooling cylinder (4) and flows in a detour through a plurality of communication pipes (59) uniformly distributed, at the same time, the water pump (10) is started, the cooling water in the water tank (2) is pumped into the interlayer or the special flow channel of the cooling cylinder (4), flows in an "S" shape path through the flow guide of the communication mechanism (5), and forms efficient heat exchange with the tail gas flow direction, in the process, the ester vapor in the tail gas is fully cooled and liquefied into liquid ester; Step three: the liquid ester condensed is gathered at the bottom of the communication pipe (59), the discharging mechanism (8) is started, then the discharging mechanism (8) pushes and transports the condensed ester attached to the pipe wall and deposited at the bottom to the discharging position, and finally the condensed ester is concentratedly recovered through disassembling the material collecting area; Step four: during the cooling process, the vibration mechanism (6) works synchronously, the pressure fluctuation generated by the cooling water flow or system operation acts on the vibration mechanism (6), and pushes the vibration mechanism (6) to move downward periodically. This continuous up and down vibration is transmitted to the entire cooling cylinder (4), which shakes off the condensed ester attached to the inner wall and the communication pipe (59), prevents blockage, and accelerates its flow to the discharge mechanism (8).

Images