Intelligent proportion control system and method for mixed aromatic raw materials

Abstract

The invention relates to the technical field of chemical production, and discloses an intelligent proportioning control system for mixed aromatic raw materials, which comprises a reactor body, a reaction chamber is arranged in the reactor body, a catalyst and a hydrogen concentration detection sensor are arranged in the reaction chamber, a feeding pipe is arranged at the upper end of the reaction chamber, and a feeding pipe is arranged at the lower end of the reaction chamber. A feeding pipe is arranged at the upper end of the reaction chamber, a discharging pipe is arranged at the lower end of the reaction chamber, a first airflow distribution assembly is arranged at the feeding pipe and comprises a flow guide cover, a fixed hole plate is arranged on the lower side of the flow guide cover, and a plurality of groups of vent holes are formed in the fixed hole plate. According to the device, the driving motor and the rotating seat are arranged, the driving motor can drive the rotating seat to rotate, the electric push rod and the lifting seat are arranged on the rotating seat, the lifting seat can be pushed to move upwards through the electric push rod, and in the process, the dredging teeth on the lifting seat can be inserted into the vent hole, so that the purpose of dredging the vent hole is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical production, and specifically to an intelligent proportioning control system and method for mixed aromatic raw materials. Background Art

[0002] The core essence of the mixed aromatic hydrocarbon hydrogenation process lies in accurately and thoroughly removing the impurity components and unsaturated compounds existing in the mixed aromatic hydrocarbon system, and then producing benzene, toluene, and xylene products that meet high-purity standards. Specifically, the crude benzene raw material is often mixed with various impurities outside the benzene ring structure, such as quinone compounds and some toluene and xylene, etc., and also contains unsaturated compounds such as styrene and phenol. Through the crude benzene hydrogenation technology, the crude benzene reacts chemically with hydrogen under the catalytic action of an efficient catalyst, and these impurities and unsaturated compounds can be effectively converted into stable cycloalkane compounds. Subsequently, through the rectification separation process, benzene products with extremely high purity are separated.

[0003] Mixed aromatic hydrocarbons: namely, mixtures of aromatic hydrocarbons, mainly composed of low-molecular-weight organic compounds such as C5 to C9, and also containing other impurity components such as sulfur, benzene, olefins, and non-aromatics. At the specific implementation level of the process operation, the low-temperature hydrogenation technology needs to be carried out in the temperature range of 240 to 280 °C and the pressure condition of 2.5 MPa. The selective hydrogenation technology, under the catalytic action of a catalyst, greatly reduces the probability of aromatic hydrocarbon compounds such as pure benzene and toluene being hydrogenated to form by-products such as cyclohexane and methylcyclohexane, and makes the raw material hydrogenation mainly act on the olefin impurities in the aromatic hydrocarbons to carry out hydrogenation reactions.

[0004] During the benzene hydrogenation production process, it is necessary to continuously supplement hydrogen into the reaction device through a gas addition device to enable the reaction to proceed smoothly. Since the hydrogenation reaction is affected by a series of factors such as temperature and pressure, the consumption of hydrogen in the reactor is fast and slow. Therefore, it is necessary to use an intelligent proportioning system to adjust the gas supply volume in real time;

[0005] In the existing benzene hydrogenation production process, due to continuous hydrogenation, but not all the added hydrogen can react fully. To avoid waste, it is necessary to recycle the generated waste hydrogen. Currently, when recycling hydrogen, it is usually only simply filtered, so that the purity of the hydrogen used for the second time is not high. When the reactants enter the reactor with the hydrogen recycled for the second time, it is easy to cause blockage of the gas distributor. The gas distributor is part of the raw material proportioning. Its function is to make the hydrogen enter the reactor and be more evenly distributed over the entire cross-section, which can improve the contact performance between the gas and the solid catalyst and improve the reaction efficiency. Partial blockage of the gas distributor will cause uneven distribution of hydrogen after it enters the reactor, reducing the use efficiency of hydrogen and indirectly affecting the reaction efficiency. Summary of the Invention

[0006] The present invention provides an intelligent proportioning control system and method for mixed aromatic raw materials, which has the beneficial effect of effectively improving the utilization efficiency of hydrogen, and solves the problem that the purity of the hydrogen used for the second time mentioned in the above background technology is not high, and impurities are likely to cause blockage of the gas distributor when entering the reactor with the hydrogen recycled for the second time, resulting in uneven distribution of hydrogen after entering the reactor, and reducing the utilization efficiency of hydrogen.

[0007] The present invention provides the following technical solution: An intelligent proportioning control system for mixed aromatic raw materials, including a reactor body, a reaction chamber is provided inside the reactor body, and a catalyst and a hydrogen concentration detection sensor are provided in the reaction chamber. An inlet pipe is provided at the upper end of the reaction chamber, and an outlet pipe is provided at the lower end of the reaction chamber. A first air flow distribution component is provided at the inlet pipe, and the first air flow distribution component includes a flow guide cover. A fixed orifice plate is provided below the flow guide cover, and a number of ventilation holes are provided on the fixed orifice plate.

[0008] A rotating seat is provided below the fixed orifice plate, and a driving motor for driving the rotating seat to rotate is provided on the fixed orifice plate. An electric push rod and a lifting seat are provided on the rotating seat. A number of dredging teeth are provided on the lifting seat. The piston rod of the electric push rod is fixedly connected to the lifting seat. A moving orifice plate is provided below the rotating seat, and a second air flow distribution component is provided below the moving orifice plate. The moving orifice plate is elastically connected to the reactor body through a first spring, and a number of protrusions are annularly arranged at the upper end of the moving orifice plate.

[0009] As an optional scheme of the intelligent proportioning control system for mixed aromatic raw materials of the present invention, wherein: the second air flow distribution component includes a base, the base is fixedly connected to the reactor body, and a number of first through holes are provided on the base. A first support rod is provided in the first through hole, and a flow guide column is provided on the first support rod. The upper end of the flow guide column is in a conical shape.

[0010] As an optional scheme of the intelligent proportioning control system for mixed aromatic raw materials of the present invention, wherein: the second air flow distribution component includes a substrate, the substrate is fixedly connected to the reactor body, and a number of second through holes are provided on the substrate. A second support rod is provided in the second through hole, and a support column is provided on the second support rod. The support column is rotatably connected to the second support rod, and a transmission gear is provided on the support column. A transmission rack is provided inside the substrate, and the transmission rack is elastically connected to the substrate through a second spring. The transmission rack passes through the second through hole and meshes with the transmission gear. A flow guide plate is provided at the lower end of the support column, and a driving unit for driving the transmission rack to move is provided in the middle of the substrate.

[0011] As an alternative solution of the intelligent proportioning control system for a mixed aromatic raw material according to the present invention, wherein: the driving unit includes a main cylinder body, on which several auxiliary cylinder bodies are provided. A first piston is arranged inside the main cylinder body, and the first piston is elastically connected to the main cylinder body through a return spring. A first piston rod is arranged on the first piston, and one end of the first piston rod extends to the outside of the main cylinder body. A second piston is arranged inside the auxiliary cylinder body, and a second piston rod is arranged on the second piston. One end of the second piston rod is fixedly connected to the transmission rack.

[0012] As an alternative solution of the intelligent proportioning control system for a mixed aromatic raw material according to the present invention, wherein: the driving unit includes a pressure head, and the pressure head is fixedly connected to the moving orifice plate through a connecting rod. A notch that matches the pressure head in position is formed at the center of the substrate. A transmission rod is arranged inside the notch. One end of the transmission rod is provided with an extension block, and the other end of the transmission rod is fixedly connected to the transmission rack. The upper end of the extension block is provided with an inclined surface.

[0013] As an alternative solution of the intelligent proportioning control system for a mixed aromatic raw material according to the present invention, wherein: a pressure detection device is arranged on one side of the rotating seat, and the pressure detection device includes a movable plate and a support plate. One end of the movable plate is rotatably connected to the rotating seat. One end of the support plate is fixedly connected to the rotating seat, and a pressure sensor and a support spring for supporting the movable plate are arranged on the support plate.

[0014] As an alternative solution of the intelligent proportioning control system for a mixed aromatic raw material according to the present invention, wherein: both the lifting seat and the dredging teeth are of a hollow structure. One end of the dredging teeth is communicated with the lifting seat. One end of the lifting seat is provided with a connecting pipe, and one end of the connecting pipe is connected to an air pipe through a universal rotary pipe joint. One end of the air pipe extends to the outside of the reactor body. Several material suction ports are distributed around the dredging teeth.

[0015] As an alternative solution of the intelligent proportioning control system for a mixed aromatic raw material according to the present invention, wherein: a cleaning seat is arranged on the lower side of the fixed orifice plate, and several brushes are arranged on the cleaning seat. A notch that matches the dredging teeth is arranged on the brushes.

[0016] As an alternative solution of the intelligent proportioning control system for a mixed aromatic raw material according to the present invention, wherein: a support is arranged on the lower side of the reaction chamber, and a steel cage is arranged on the support. The catalyst is located inside the steel cage.

[0017] A control method for an intelligent proportioning control system for a mixed aromatic raw material includes the following steps:

[0018] S1. Hydrogen is sent into the reaction chamber through an air pump, and the controller adjusts the gas supply volume at any time according to the measured value of the hydrogen concentration detection sensor;

[0019] S2. After hydrogen enters the reaction chamber, it first diffuses under the action of the first gas flow distribution component, then further diffuses under the action of the second gas flow distribution component, and finally contacts the catalyst;

[0020] S3. When the rotating seat rotates, the pressure sensor detects the blockage condition of the ventilation holes. When blockage is found, the fixed orifice plate is dredged through the dredging teeth to ensure the gas flow dispersion effect.

[0021] The present invention has the following beneficial effects:

[0022] 1. In the intelligent ratio control system and method for mixed aromatic raw materials, by setting a driving motor and a rotating seat, the driving motor can drive the rotating seat to rotate. An electric push rod and a lifting seat are arranged on the rotating seat. The electric push rod can push the lifting seat to move upward. During this process, the dredging teeth on the lifting seat will insert into the ventilation holes, thereby achieving the purpose of dredging the ventilation holes.

[0023] 2. In the intelligent ratio control system and method for mixed aromatic raw materials, by setting the second gas flow distribution component, which includes a base. When the rotating seat rotates, it will intermittently contact the protrusions on the moving orifice plate, thereby causing the moving orifice plate to move up and down reciprocally. A part of the guide column will insert into the air holes on the moving orifice plate. Since the upper end of the guide column is conical, the gas flow will flow out through the gap between the hole wall and the guide column. When the guide column is closer to the moving orifice plate, the gap is smaller and the flow domain is smaller. On the contrary, the gap is larger and the flow domain is larger. As the flow domain changes, the flow rate of the gas flow will also change. By continuously changing the flow domain of the gas flow, an effect of promoting gas flow dispersion and mixing can be achieved.

[0024] 3. In the intelligent ratio control system and method for mixed aromatic raw materials, by setting dredging teeth with a suction port, the dredging teeth, the lifting seat, the connecting pipe, and the air pipe are interconnected. The air pipe is externally connected to a negative pressure fan. The suction port can clean the debris generated during dredging. A cleaning seat is arranged on the lower side of the fixed orifice plate. As the rotating seat rotates, the dredging teeth will indirectly contact the brush, and the brush can clean the suction port on the dredging teeth, effectively preventing the suction port from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the present invention.

[0026] Figure 2 is a schematic diagram of the internal structure of the reactor body of the present invention.

[0027] Figure 3Schematic structural diagram of the rotating seat of the present invention.

[0028] Figure 4 of the present invention Figure 2 Enlarged schematic diagram of the structure at position A in

[0029] Figure 5 Schematic structural diagram of the second air flow distribution component in the second embodiment of the present invention.

[0030] Figure 6 Schematic structural diagram of the drive unit in the third embodiment of the present invention.

[0031] Figure 7 Schematic internal structure diagram of the rotating seat of the present invention.

[0032] In the figure: 1. Reactor body; 101. Reaction chamber; 2. Catalyst; 3. Feed pipe; 4. Discharge pipe; 5. Deflector; 6. Fixed orifice plate; 601. Vent hole; 7. Rotating seat; 8. Driving motor; 9. Electric push rod; 10. Lifting seat; 11. Cleaning teeth; 12. Movable orifice plate; 1201. Protrusion; 13. First spring; 14. Base; 1401. First through hole; 1402. First support rod; 1403. Flow guiding column; 15. Substrate; 1501. Second through hole; 1502. Second support rod; 1503. Support column; 1504. Transmission gear; 1505. Flow guiding plate; 16. Transmission rack; 17. Second spring; 18. Main cylinder body; 19. First piston; 20. First piston rod; 21. Sub-cylinder body; 22. Second piston; 23. Second piston rod; 24. Pressing head; 25. Notch; 26. Transmission rod; 27. Extension block; 28. Movable plate; 29. Support plate; 30. Pressure sensor; 31. Support spring; 32. Connecting pipe; 33. Air pipe; 34. Suction port; 35. Cleaning seat; 36. Brush; 37. Support; 38. Steel cage; 39. Rebound spring; 40. Connecting rod. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment 1, please refer to Figures 1 to 7, an intelligent proportioning control system for mixed aromatic raw materials, comprising a reactor body 1. A reaction chamber 101 is provided inside the reactor body 1, and a catalyst 2 and a hydrogen concentration detection sensor 102 are provided in the reaction chamber 101. A feed pipe 3 is provided at the upper end of the reaction chamber 101, and a discharge pipe 4 is provided at the lower end of the reaction chamber 101. A first air flow distribution assembly is provided at the feed pipe 3, and the first air flow distribution assembly includes a flow guide cover 5. A fixed orifice plate 6 is provided below the flow guide cover 5, and a number of ventilation holes 601 are provided on the fixed orifice plate 6;

[0035] A rotating seat 7 is provided below the fixed orifice plate 6, and a driving motor 8 for driving the rotating seat 7 to rotate is provided on the fixed orifice plate 6. An electric push rod 9 and a lifting seat 10 are provided on the rotating seat 7. A number of dredging teeth 11 are provided on the lifting seat 10. The piston rod of the electric push rod 9 is fixedly connected to the lifting seat 10. A moving orifice plate 12 is provided below the rotating seat 7, and a second air flow distribution assembly is provided below the moving orifice plate 12. The moving orifice plate 12 is elastically connected to the reactor body 1 through a first spring 13. A number of protrusions 1201 are annularly arranged at the upper end of the moving orifice plate 12.

[0036] The second air flow distribution assembly includes a base 14. The base 14 is fixedly connected to the reactor body 1, and a number of first through holes 1401 are provided on the base 14. A first support rod 1402 is provided in the first through hole 1401, and a flow guide column 1403 is provided on the first support rod 1402. The upper end of the flow guide column 1403 is conical.

[0037] By providing the hydrogen concentration detection sensor 102, the hydrogen concentration detection sensor 102 is connected to a PLC controller outside the reactor body 1 through a wire. The hydrogen concentration inside the reactor body 1 can be detected through the hydrogen concentration detection sensor 102. In this way, the PLC controller can adjust the supply of hydrogen according to the hydrogen concentration inside the reactor body 1, thereby achieving the effect of intelligent proportioning.

[0038] A flow guide cover 5 is provided at the end of the feed pipe 3. A number of air holes are provided on the flow guide cover 5. A fixed orifice plate 6 is provided on the lower side of the flow guide cover 5. A number of groups of ventilation holes 601 are provided on the fixed orifice plate 6. The ventilation holes 601 are radially arranged on the fixed orifice plate 6. After hydrogen enters the reaction chamber 101 through the feed pipe 3, it first accumulates in the gap between the flow guide cover 5 and the fixed orifice plate 6, and then flows downward through the ventilation holes 601. After long-term use, impurities brought by hydrogen will cause the ventilation holes 601 to be blocked. For this reason, a cleaning mechanism for dredging the ventilation holes 601 is provided on the lower side of the fixed orifice plate 6. It includes a driving motor 8 and a rotating seat 7. The driving motor 8 can drive the rotating seat 7 to rotate. An electric push rod 9 and a lifting seat 10 are provided on the rotating seat 7. The electric push rod 9 can push the lifting seat 10 to move upward. During this process, the dredging teeth 11 on the lifting seat 10 will be inserted into the ventilation holes 601, so as to achieve the purpose of dredging the ventilation holes 601.

[0039] In order to improve the reaction effect, a second gas flow distribution component is also provided on the lower side of the moving orifice plate 12. It includes a base 14. A number of first through holes 1401 are provided on the base 14. A flow guide column 1403 is provided in the first through holes 1401. Air holes are also provided on the moving orifice plate 12, and their positions correspond to the flow guide columns 1403 one by one. An inclined surface is provided at the lower end of the rotating seat 7. When the rotating seat 7 rotates, it will intermittently contact the protrusion 1201 on the moving orifice plate 12. Affected by the rotating seat 7, the protrusion 1201 and the moving orifice plate 12 will intermittently move up and down reciprocally. During the downward movement of the moving orifice plate 12, a part of the flow guide column 1403 will be inserted into the air holes on the moving orifice plate 12. Since the upper end of the flow guide column 1403 is conical, when the distance between the flow guide column 1403 and the moving orifice plate 12 changes, it will affect the flow domain of the gas flow. Specifically, the gas flow will flow out through the gap between the hole wall and the flow guide column 1403. When the flow guide column 1403 is closer to the moving orifice plate 12, the gap is smaller and the flow domain is smaller. On the contrary, the gap is larger and the flow domain is larger. With the change of the flow domain, the flow velocity of the gas flow will also change. By continuously changing the flow domain of the gas flow, an effect of promoting the dispersion and mixing of the gas flow can be achieved, which can not only promote the dispersion of hydrogen, but also promote the mixing of hydrogen with the gaseous raw materials inside the reactor body 1.

[0040] It should be noted that: in addition to the first through holes 1401, a number of holes equal to the first through holes 1401 are also provided on the base 14. After the gaseous material is dispersed and mixed by the flow guide column 1403 and the moving orifice plate 12, a part of the raw material flows away through the first through holes 1401, and the other part of the raw material flows away through the holes.

[0041] Embodiment 2. This embodiment is an explanatory description based on Embodiment 1. Specifically, please refer to Figures 1 to 7, the second gas flow distribution component includes a substrate 15, the substrate 15 is fixedly connected to the reactor body 1, and a number of second through holes 1501 are provided on the substrate 15. A second support rod 1502 is provided in the second through hole 1501, and a support column 1503 is provided on the second support rod 1502. The support column 1503 is rotatably connected to the second support rod 1502, and a transmission gear 1504 is provided on the support column 1503. A transmission rack 16 is provided in the substrate 15, and the transmission rack 16 is elastically connected to the substrate 15 through a second spring 17. The transmission rack 16 passes through the second through hole 1501 and meshes with the transmission gear 1504. A flow guide plate 1505 is provided at the lower end of the support column 1503, and a driving unit for driving the movement of the transmission rack 16 is provided in the middle of the substrate 15.

[0042] The driving unit includes a main cylinder body 18, and a number of auxiliary cylinder bodies 21 are provided on the main cylinder body 18. A first piston 19 is provided in the main cylinder body 18, and the first piston 19 is elastically connected to the main cylinder body 18 through a return spring 39. A first piston rod 20 is provided on the first piston 19, and one end of the first piston rod 20 extends to the outside of the main cylinder body 18. A second piston 22 is provided in the auxiliary cylinder body 21, and a second piston rod 23 is provided on the second piston 22. One end of the second piston rod 23 is fixedly connected to the transmission rack 16.

[0043] This embodiment discloses another second gas flow distribution component, which includes a support column 1503 disposed in the second through hole 1501. A transmission gear 1504 is provided on the support column 1503. Correspondingly, a transmission rack 16 is provided in the substrate 15. A driving unit is provided in the middle of the substrate 15, which includes a main cylinder body 18 and auxiliary cylinder bodies 21. The auxiliary cylinder bodies 21 are arranged in a circumferential ring around the main cylinder body 18, and one end of the auxiliary cylinder body 21 is communicated with the main cylinder body 18. Pistons are provided in both the main cylinder body 18 and the auxiliary cylinder bodies 21. When the moving orifice plate 12 moves downward, it will contact the first piston rod 20, thereby pushing the first piston rod 20 and the first piston 19 to move. Affected by the first piston 19, the gas in the main cylinder body 18 enters the auxiliary cylinder bodies 21 and pushes the second piston 22 and the second piston rod 23 to move. Driven by the second piston 22, the transmission rack 16 moves. As the transmission rack 16 moves, the support column 1503 and the transmission gear 1504 rotate. Driven by the support column 1503, the flow guide plate 1505 rotates. When the gas passes through the second through holes 1501 on the substrate 15 and flows towards the catalyst, as the flow guide plate 1505 rotates, the flow direction of the gas continuously changes. The flow guide plate 1505 also plays a role in stirring, and can stir the gas at the gap between the substrate 15 and the catalyst 2, so as to make the gas contact the catalyst 2 more evenly.

[0044] After losing the pressure of the movable orifice plate 12, the transmission rack 16 returns to its original position under the action of the second spring 17. Correspondingly, the second piston 22 and the second piston rod 23 return to their original positions. Under the action of air pressure and the return spring 39, the first piston 19 and the first piston rod 20 return to their original positions.

[0045] Embodiment 3 is an explanatory description based on Embodiment 2. Specifically, please refer to Figures 1 to 7 , the driving unit includes a pressing head 24. The pressing head 24 is fixedly connected to the movable orifice plate 12 through a connecting rod 40. A notch 25 whose position coincides with the pressing head 24 is provided at the center of the substrate 15. A transmission rod 26 is provided in the notch 25. One end of the transmission rod 26 is provided with an extension block 27, and the other end of the transmission rod 26 is fixedly connected to the transmission rack 16. The upper end of the extension block 27 is provided with an inclined surface.

[0046] This embodiment discloses another driving unit, which includes a pressing head 24. The pressing head 24 is fixed on the movable orifice plate 12. When the movable orifice plate 12 moves downward, the pressing head 24 moves synchronously. At this time, the pressing head 24 will contact the inclined surface on the extension block 27 in the notch 25. Under the push of the pressing head 24, the extension block 27 drives the transmission rod 26 to move. One end of the transmission rod 26 is fixedly connected to the transmission rack 16. Under the push of the transmission rod 26, the transmission rack 16 moves synchronously, and thus the purpose of promoting the rotation of the support column 1503 can be achieved.

[0047] Embodiment 4 is an explanatory description based on Embodiment 2. Specifically, please refer to Figures 1 to 7 , a pressure detection device is provided on one side of the rotating seat 7. The pressure detection device includes a movable plate 28 and a support plate 29. One end of the movable plate 28 is rotatably connected to the rotating seat 7. One end of the support plate 29 is fixedly connected to the rotating seat 7. A pressure sensor 30 and a support spring 31 for supporting the movable plate 28 are provided on the support plate 29.

[0048] Both the lifting seat 10 and the dredging teeth 11 are of hollow structures. One end of the dredging teeth 11 is communicated with the lifting seat 10. One end of the lifting seat 10 is provided with a connecting pipe 32. One end of the connecting pipe 32 is connected with an air pipe 33 through a universal rotary pipe joint. One end of the air pipe 33 extends to the outside of the reactor body 1. A plurality of material suction ports 34 are distributed around the dredging teeth 11.

[0049] A cleaning seat 35 is provided on the lower side of the fixed orifice plate 6. A plurality of brush hairs 36 are provided on the cleaning seat 35. Notches that coincide with the dredging teeth 11 are provided on the brush hairs 36.

[0050] A support 37 is provided on the lower side of the reaction chamber 101. A steel cage 38 is provided on the support 37. The catalyst 2 is located in the steel cage 38.

[0051] In order to facilitate the determination of the blockage position of the ventilation hole 601, a pressure detection device is provided on the rotating seat 7 in this technical solution. The principle is that if the ventilation hole 601 is blocked, it will be difficult for gas to pass through the ventilation hole 601. When the air flow passes through the ventilation hole 601 here, the impact force generated will become smaller. The pressure detection device includes a movable plate 28 and a support plate 29. The movable plate 28 can rotate. A support spring 31 and a pressure sensor 30 are provided on the support plate 29. As the rotating seat 7 rotates, the movable plate 28 will face the ventilation hole 601. When the ventilation hole 601 is not blocked, the impact force of the air flow is relatively large. At this time, the movable plate 28 will deflect significantly against the resistance of the support spring 31, and the pressure measured by the pressure sensor 30 will be relatively large. If the ventilation hole 601 is blocked, the impact force of the air flow becomes smaller, and the pressure measured by the pressure sensor 30 will become smaller. At this time, the ventilation hole 601 can be dredged by the lifting seat 10 with dredging teeth 11.

[0052] Specifically, the pressure sensor 30 is externally connected to a PLC controller. As the rotating seat 7 rotates, the position of the movable plate 28 is opposite to that of the ventilation hole 601. If the value measured by the pressure sensor 30 is within the normal range, the rotating seat 7 continues to rotate. If the value measured by the pressure sensor 30 is relatively small, it is determined that the ventilation hole 601 is blocked, and the rotating seat 7 rotates back until the dredging teeth 11 are opposite to the ventilation hole 601. Then, the electric push rod 9 works, and the dredging teeth 11 are inserted into the ventilation hole 601. The dredging teeth 11, the lifting seat 10, the connecting pipe 32, and the air pipe 33 are interconnected. The air pipe 33 is externally connected to a negative pressure fan. As the dredging teeth 11 move, the negative pressure fan works. A suction port 34 is provided on the dredging teeth 11, and the debris generated during dredging can be cleaned through the suction port 34.

[0053] The connecting pipe 32 is fixedly connected to the rotating seat 7, and one end of it is slidably connected to the lifting seat 10. A gear is provided on the connecting pipe 32, and the driving motor 8 is in transmission connection with the connecting pipe 32 through the gear. The driving motor 8 drives the connecting pipe 32 to rotate, thereby causing the rotating seat 7 to rotate.

[0054] In order to prevent the suction port 34 from being blocked during daily use, a cleaning seat 35 is provided on the lower side of the fixed orifice plate 6 in this technical solution. As the rotating seat 7 rotates, the dredging teeth 11 will indirectly contact the brush 36, and the suction port 34 on the dredging teeth 11 can be cleaned through the brush 36.

[0055] A control method for an intelligent proportioning control system for mixed aromatic raw materials includes the following steps:

[0056] S1. Send hydrogen into the reaction chamber 101 through an air pump, and the controller adjusts the air supply volume at any time according to the measured value of the hydrogen concentration detection sensor 102;

[0057] After hydrogen enters the reaction chamber 101, it first diffuses under the action of the first gas flow distribution component, and then further diffuses under the action of the second gas flow distribution component. During the diffusion process, hydrogen will mix with the gaseous raw materials in the reactor, and finally the mixture contacts the catalyst 2 to complete the reaction;

[0058] When the rotating seat 7 rotates, the pressure sensor 30 detects the blockage condition of the ventilation hole 601. When blockage is found, the fixed orifice plate 6 is dredged by the dredging teeth 11 to ensure the gas flow dispersion effect.

[0059] By setting the hydrogen concentration detection sensor 102 in cooperation with the PLC controller, the purpose of real-time regulation of the hydrogen supply volume during the reaction can be achieved. By setting the rotating seat 7 with the pressure sensor 30, the blockage position of the fixed orifice plate 6 can be automatically detected and then cleaned, with a high degree of intelligence, effectively ensuring the distribution effect of the gas flow distribution component.

[0060] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0061] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An intelligent proportioning control system for mixed aromatic raw materials, comprising a reactor body (1), wherein a reaction chamber (101) is provided inside the reactor body (1), and a catalyst (2) and a hydrogen concentration detection sensor (102) are provided inside the reaction chamber (101), a feed pipe (3) is provided at the upper end of the reaction chamber (101), and a discharge pipe (4) is provided at the lower end of the reaction chamber (101), characterized in that: A first airflow distribution component is provided at the feed pipe (3), and the first airflow distribution component comprises a guide cover (5), a fixed hole plate (6) is provided on the lower side of the guide cover (5), and a plurality of groups of ventilation holes (601) are provided on the fixed hole plate (6); A rotating seat (7) is provided on the lower side of the fixed orifice plate (6), and a driving motor (8) for driving the rotating seat (7) to rotate is provided on the fixed orifice plate (6), an electric push rod (9) and a lifting seat (10) are provided on the rotating seat (7), and a plurality of dredging teeth (11) are provided on the lifting seat (10), and a piston rod of the electric push rod (9) is fixedly connected to the lifting seat (10), a moving orifice plate (12) is provided on the lower side of the rotating seat (7), and a second airflow distribution component is provided on the lower side of the moving orifice plate (12), the moving orifice plate (12) is elastically connected to the reactor body (1) through a first spring (13), and a plurality of protrusions (1201) are arranged around the upper end of the moving orifice plate (12).

2. The intelligent proportioning control system for mixed aromatic raw materials according to claim 1, characterized in that: The second airflow distribution assembly comprises a base (14), the base (14) is fixedly connected to the reactor body (1), and a plurality of first through holes (1401) are provided on the base (14), a first support rod (1402) is provided in the first through hole (1401), and a guide column (1403) is provided on the first support rod (1402), and the upper end of the guide column (1403) is conical.

3. The intelligent proportioning control system for mixed aromatic raw materials according to claim 1, characterized in that: The second gas flow distribution assembly comprises a base plate (15), the base plate (15) is fixedly connected to the reactor body (1), and the base plate (15) is provided with a plurality of second through holes (1501), a second support rod (1502) is provided in the second through hole (1501), and a support column (1503) is provided on the second support rod (1502), the support column (1503) is rotatably connected to the second support rod (1502), and the support column (1503) is provided with A transmission gear (1504) is provided in the base plate (15), and the transmission rack (16) is elastically connected to the base plate (15) via a second spring (17), the transmission rack (16) passes through the second through hole (1501) and meshes with the transmission gear (1504), a guide plate (1505) is provided at the lower end of the support column (1503), and a driving unit for driving the transmission rack (16) to move is provided in the middle of the base plate (15).

4. The intelligent proportioning control system for mixed aromatic raw materials according to claim 3 is characterized in that: The driving unit comprises a main cylinder (18), a plurality of auxiliary cylinders (21) are arranged on the main cylinder (18), a first piston (19) is arranged in the main cylinder (18), and the first piston (19) is elastically connected to the main cylinder (18) through a rebound spring (39), a first piston rod (20) is arranged on the first piston (19), and one end of the first piston rod (20) extends to the outside of the main cylinder (18), a second piston (22) is arranged in the auxiliary cylinder (21), and a second piston rod (23) is arranged on the second piston (22), and one end of the second piston rod (23) is fixedly connected to the transmission rack (16).

5. The intelligent proportioning control system for mixed aromatic raw materials according to claim 3 is characterized in that: The driving unit comprises a pressure head (24), the pressure head (24) being fixedly connected to the movable orifice plate (12) via a connecting rod (40), a notch (25) being provided at the center of the base plate (15) and being matched with the pressure head (24), a transmission rod (26) being provided in the notch (25), an extension block (27) being provided at one end of the transmission rod (26), and the other end of the transmission rod (26) being fixedly connected to the transmission rack (16), and an inclined surface being provided at the upper end of the extension block (27).

6. The intelligent proportioning control system for mixed aromatic raw materials according to claim 1, characterized in that: A pressure detection device is provided on one side of the rotating seat (7), and the pressure detection device comprises a movable plate (28) and a support plate (29), one end of the movable plate (28) is rotatably connected to the rotating seat (7), one end of the support plate (29) is fixedly connected to the rotating seat (7), and a pressure sensor (30) and a support spring (31) for supporting the movable plate (28) are provided on the support plate (29).

7. The intelligent proportioning control system for mixed aromatic raw materials according to claim 6, characterized in that: The lifting seat (10) and the dredging teeth (11) are both hollow structures. One end of the dredging teeth (11) is connected to the lifting seat (10). One end of the lifting seat (10) is provided with a connecting pipe (32). One end of the connecting pipe (32) is connected to an air pipe (33) via a universal rotating pipe joint. One end of the air pipe (33) extends to the outside of the reactor body (1). A plurality of suction ports (34) are arranged around the dredging teeth (11).

8. The intelligent proportioning control system for mixed aromatic raw materials according to claim 7, characterized in that: A cleaning seat (35) is provided on the lower side of the fixed hole plate (6), a plurality of brushes (36) are provided on the cleaning seat (35), and notches that fit with the dredging teeth (11) are provided on the brushes (36).

9. The intelligent proportioning control system for mixed aromatic raw materials according to claim 1, characterized in that: A support (37) is provided at the lower side of the reaction chamber (101), and a steel cage (38) is provided on the support (37), and the catalyst (2) is located in the steel cage (38).

10. The control method of an intelligent proportioning control system for mixed aromatic raw materials according to any one of claims 1 to 9, characterized in that: The steps include: S1. Hydrogen is delivered into the reaction chamber (101) by means of an air pump, and the controller adjusts the delivery amount at any time according to the measurement value of the hydrogen concentration detection sensor (102); S2, after the hydrogen enters the reaction chamber (101), it first diffuses under the action of the first airflow distribution component, then further diffuses under the action of the second airflow distribution component, and finally contacts the catalyst (2); S3. When the rotating seat (7) rotates, the pressure sensor (30) detects the blockage of the vent hole (601). When blockage is found, the fixed hole plate (6) is cleared by the clearing teeth (11) to ensure the air flow dispersion effect.

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