Intelligent proportioning control system and method for mixed aromatic raw materials

Abstract

The present invention relates to the field of chemical production technology, and discloses an intelligent proportioning control system for mixed aromatic raw materials, comprising a reactor body, a reaction chamber provided inside the reactor body, a catalyst and a hydrogen concentration detection sensor provided in the reaction chamber, a feed pipe provided at the upper end of the reaction chamber, and a discharge pipe provided at the lower end of the reaction chamber, a first airflow distribution component provided at the feed pipe, and the first airflow distribution component comprising a guide cover, a fixed orifice plate provided on the lower side of the guide cover, and a plurality of groups of vents provided on the fixed orifice plate. The present invention is provided with 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 provided on the rotating seat, the electric push rod can push the lifting seat to move upward, and during this process, the dredging teeth on the lifting seat will be inserted into the vents, thereby achieving the purpose of dredging the vents.

Description

Technical Field

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

[0002] The core essence of the mixed aromatics hydrogenation process lies in the precise and thorough removal of impurities and unsaturated compounds present in the mixed aromatics system, thereby producing benzene, toluene, and xylene products that meet high-purity standards. Specifically, crude benzene raw materials are often mixed with a variety of impurities outside the benzene ring structure, such as quinone compounds and some toluene and xylene, as well as unsaturated compounds such as benzene, olefins, and phenol. Through crude benzene hydrogenation technology, crude benzene and hydrogen react chemically under the catalytic action of a high-efficiency catalyst, which can effectively convert these impurities and unsaturated compounds into stable cycloalkane compounds. Subsequently, through a distillation separation process, a benzene product of extremely high purity is separated.

[0003] Mixed aromatics: A mixture of aromatic hydrocarbons, primarily composed of low-molecular-weight organic compounds such as C5 to C9, also contains other impurities such as sulfur, benzene, olefins, and non-aromatic hydrocarbons. In terms of process implementation, low-temperature hydrogenation technology must be carried out within a temperature range of 240 to 280°C and a pressure of 2.5 MPa. Selective hydrogenation technology, on the other hand, uses a catalyst to significantly reduce the probability of hydrogenating aromatic compounds like pure benzene and toluene to produce byproducts such as cyclohexane and methylcyclohexane, allowing the hydrogenation of the feedstock to primarily target the olefin impurities in the aromatics.

[0004] During the benzene hydrogenation production process, hydrogen needs to be continuously added to the reactor through gasification equipment to ensure the smooth progress of the reaction. Since the hydrogenation reaction is affected by a series of factors such as temperature and pressure, the consumption of hydrogen in the reactor varies. Therefore, an intelligent proportioning system is needed to control the gas supply in real time.

[0005] In the existing benzene hydrogenation production process, due to continuous hydrogenation, not all added hydrogen can fully react. To avoid waste, the waste hydrogen generated needs to be recycled. Currently, when hydrogen is recycled, it is usually only simply filtered, so the purity of the secondary used hydrogen is not high. When the reactants enter the reactor with the secondary recycled hydrogen, it is easy to cause blockage of the gas distributor. The gas distributor is an important part of the raw material ratio. Its function is to allow the hydrogen to enter the reactor and distribute more evenly 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 the hydrogen to be unevenly distributed after entering the reactor, reducing the utilization efficiency of the 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 mentioned in the above background technology that the purity of the secondary recycled hydrogen is not high, and impurities easily cause clogging of the gas distributor when entering the reactor with the secondary recycled hydrogen, resulting in uneven distribution of hydrogen after entering the reactor, thereby 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, comprising a reactor body, a reaction chamber provided inside the reactor body, a catalyst and a hydrogen concentration detection sensor provided in the reaction chamber, a feed pipe provided at the upper end of the reaction chamber, and a discharge pipe provided at the lower end of the reaction chamber, a first airflow distribution component provided at the feed pipe, and the first airflow distribution component including a guide cover, a fixed orifice plate provided on the lower side of the guide cover, and a plurality of groups of vent holes provided on the fixed orifice plate;

[0008] A rotating seat is provided on the lower side of 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 plurality of dredging teeth are provided on the lifting seat, and a piston rod of the electric push rod is fixedly connected to the lifting seat, a movable orifice plate is provided on the lower side of the rotating seat, and a second airflow distribution assembly is provided on the lower side of the movable orifice plate, the movable orifice plate is elastically connected to the reactor body by a first spring, and a plurality of protrusions are arranged around the upper end of the movable orifice plate.

[0009] As an optional solution of the intelligent proportioning control system for mixed aromatic raw materials described in the present invention, the second airflow distribution component includes a base, which is fixedly connected to the reactor body, and a plurality of first through holes are provided on the base, a first support rod is provided in the first through hole, and a guide column is provided on the first support rod, and the upper end of the guide column is conical.

[0010] As an optional solution of the intelligent proportioning control system for mixed aromatic raw materials described in the present invention, the second airflow distribution component includes a base plate, which is fixedly connected to the reactor body and is basically provided with a plurality of second through holes, 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 in the base plate, and the transmission rack is elastically connected to the base plate through a second spring, the transmission rack passes through the second through hole and engages with the transmission gear, a guide plate is provided at the lower end of the support column, and a drive unit for driving the transmission rack to move is provided in the middle of the base plate.

[0011] As an optional solution of the intelligent proportioning control system for mixed aromatic raw materials described in the present invention, the driving unit includes a main cylinder body, a plurality of sub-cylinder bodies are provided on the main cylinder body, a first piston is provided in the main cylinder body, and the first piston is elastically connected to the main cylinder body through a rebound spring, a first piston rod is provided 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 provided in the sub-cylinder body, and a second piston rod is provided on the second piston, and one end of the second piston rod is fixedly connected to the transmission rack.

[0012] As an optional solution of the intelligent proportioning control system for mixed aromatic raw materials described in the present invention, the driving unit includes a pressure head, which is fixedly connected to the movable orifice plate through a connecting rod, and a notch is opened at the center of the base plate, the position of which matches the pressure head. A transmission rod is provided in 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, and the upper end of the extension block is provided with an inclined surface.

[0013] As an optional solution of the intelligent proportioning control system for mixed aromatic raw materials described in the present invention, a pressure detection device is provided 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 provided on the support plate.

[0014] As an optional solution of the intelligent proportioning control system for mixed aromatic raw materials described in the present invention, the lifting seat and the dredging teeth are both hollow structures, one end of the dredging teeth is connected to the lifting seat, one end of the lifting seat is provided with a connecting pipe, one end of the connecting pipe is connected to an air pipe through a universal rotating pipe joint, one end of the air pipe extends to the outside of the reactor body, and a plurality of suction ports are arranged on the dredging teeth.

[0015] As an optional solution of the intelligent proportioning control system for mixed aromatic raw materials described in the present invention, a cleaning seat is provided on the lower side of the fixed hole plate, a plurality of brushes are provided on the cleaning seat, and the brushes are provided with notches that fit with the dredging teeth.

[0016] As an optional solution of the intelligent proportioning control system for mixed aromatic raw materials described in the present invention, a support is provided on the lower side of the reaction chamber, and a steel cage is provided on the support, and the catalyst is located in the steel cage.

[0017] A control method for an intelligent proportioning control system for mixed aromatic raw materials, comprising the following steps:

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

[0019] S2: After hydrogen enters the reaction chamber, 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;

[0020] S3. When the rotating seat rotates, the pressure sensor is used to detect the blockage of the vent hole. When blockage is found, the fixed hole plate is cleared by the clearing teeth to ensure the airflow dispersion effect.

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

[0022] 1. An intelligent proportioning control system and method for mixed aromatic raw materials is provided. A driving motor and a rotating seat are provided. The driving motor can drive the rotating seat to rotate. An electric push rod and a lifting seat are provided 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 be inserted into the vent hole, thereby achieving the purpose of dredging the vent hole.

[0023] 2. An intelligent proportioning control system and method for mixed aromatic raw materials is provided, which includes a base. When the rotating seat rotates, it will intermittently interfere with the protrusion on the movable orifice plate, thereby causing the movable orifice plate to reciprocate up and down. A part of the guide column will be inserted into the air hole on the movable orifice plate. Since the upper end of the guide column is conical, the airflow will flow out through the gap between the hole wall and the guide column. When the guide column is closer to the movable orifice plate, the smaller the gap, the smaller the flow domain. Conversely, the larger the gap, the larger the flow domain. As the flow domain changes, the flow rate of the airflow will also change. By continuously changing the flow domain of the airflow, it can achieve the effect of promoting airflow dispersion and mixing.

[0024] 3. An intelligent proportioning control system and method for mixed aromatic raw materials is provided, by providing a dredging tooth with a suction port, the dredging tooth, a lifting seat, a connecting pipe, and an air pipe are interconnected, the air pipe is externally connected to a negative pressure fan, and the debris generated during dredging can be cleaned through the suction port. A cleaning seat is provided on the lower side of the fixed hole plate. As the rotating seat rotates, the dredging tooth will indirectly contact the brush, and the suction port on the dredging tooth can be cleaned by the brush, which can effectively prevent the suction port from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0026] Figure 2 Schematic diagram of the internal structure of the reactor body of the present invention.

[0027] Figure 3It is a schematic diagram of the rotating seat structure of the present invention.

[0028] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure in the middle.

[0029] Figure 5 This is a schematic structural diagram of the second airflow distribution component in the second embodiment of the present invention.

[0030] Figure 6 Schematic diagram of the driving unit structure in embodiment 3 of the present invention.

[0031] Figure 7 It is a schematic diagram of the internal structure 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, flow guide cover; 6, fixed hole plate; 601, vent hole; 7, rotating seat; 8, drive motor; 9, electric push rod; 10, lifting seat; 11, dredging teeth; 12, movable hole plate; 1201, protrusion; 13, first spring; 14, base; 1401, first through hole; 1402, first support rod; 1403, flow guide column; 15, base plate; 1501, second through hole; 1502, second support rod; 1503, support column; 1504, transmission Drive gear; 1505, guide plate; 16, transmission rack; 17, second spring; 18, main cylinder; 19, first piston; 20, first piston rod; 21, auxiliary cylinder; 22, second piston; 23, second piston rod; 24, pressure 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 DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] For example 1, please refer to Figures 1 to 7An intelligent proportioning control system for mixed aromatic raw materials includes 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 airflow distribution component is provided at the feed pipe 3, and the first airflow distribution component includes a guide cover 5, a fixed orifice plate 6 is provided on the lower side of the guide cover 5, and a plurality of groups of vent holes 601 are provided on the fixed orifice plate 6;

[0035] 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. The lifting seat 10 is provided with a plurality of dredging teeth 11. The piston rod of the electric push rod 9 is fixedly connected to the lifting seat 10. A movable orifice plate 12 is provided on the lower side of the rotating seat 7, and a second airflow distribution assembly is provided on the lower side of the movable orifice plate 12. The movable 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 movable orifice plate 12.

[0036] The second airflow distribution assembly includes a base 14, which is fixedly connected to the reactor body 1 and has a plurality of first through holes 1401. 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. The upper end of the guide column 1403 is conical.

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

[0038] A guide cover 5 is provided at the end of the feed pipe 3. The guide cover 5 is provided with a plurality of air holes. A fixed hole plate 6 is provided on the lower side of the guide cover 5. The fixed hole plate 6 is provided with a plurality of groups of vents 601. The vents 601 are radially arranged on the fixed hole plate 6. After the hydrogen enters the reaction chamber 101 through the feed pipe 3, it first gathers in the gap between the guide cover 5 and the fixed hole plate 6, and then flows downward through the vents 601. After long-term use, impurities brought by the hydrogen will cause the vents 601 to be blocked. To this end, the present technical solution provides a cleaning mechanism for dredging the vent 601 on the lower side of the fixed hole plate 6, which 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 vent 601, thereby achieving the purpose of dredging the vent 601.

[0039] In order to improve the reaction effect, the present technical solution also provides a second air flow distribution component on the lower side of the moving orifice plate 12, which includes a base 14, a plurality of first through holes 1401 are provided on the base 14, and a guide column 1403 is provided in the first through hole 1401. The moving orifice plate 12 is also provided with an air hole, and its position corresponds one-to-one with the guide column 1403. An inclined surface is provided at the lower end of the rotating seat 7. When the rotating seat 7 rotates, it will intermittently conflict with 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 reciprocate up and down. When the moving orifice plate 12 moves downward, a part of the guide column 1403 will be inserted into the moving orifice. In the pores on the plate 12, since the upper end of the guide column 1403 is conical, when the distance between the guide column 1403 and the movable orifice plate 12 changes, it will affect the flow domain of the airflow. Specifically, the airflow will flow out through the gap between the hole wall and the guide column 1403. When the guide column 1403 is closer to the movable orifice plate 12, the smaller the gap, the smaller the flow domain. Conversely, the larger the gap, the larger the flow domain. As the flow domain changes, the flow rate of the airflow will also change. By constantly changing the flow domain of the airflow, it can promote the dispersion and mixing of the airflow, 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 hole 1401, the base 14 is also provided with a number of holes equal to the first through hole 1401. After the gaseous material is dispersed and mixed by the guide column 1403 and the movable orifice plate 12, part of the raw material flows away through the first through hole 1401, and the other part of the raw material flows away through the holes.

[0041] Example 2: This example is an explanation based on Example 1. For details, please refer to Figures 1 to 7The second air flow distribution assembly includes a base plate 15, which is fixedly connected to the reactor body 1 and 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 a transmission gear 1504 is provided on the support column 1503. A transmission rack 16 is provided in the base plate 15, and the transmission rack 16 is elastically connected to the base plate 15 through a second spring 17. The transmission rack 16 passes through the second through hole 1501 and engages 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.

[0042] The drive unit includes a main cylinder body 18, on which several sub-cylinder bodies 21 are provided. 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 rebound 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 sub-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] The present embodiment discloses another second air flow distribution component, which includes a support column 1503 arranged in the second through hole 1501, and a transmission gear 1504 is provided on the support column 1503. Correspondingly, a transmission rack 16 is provided in the base plate 15, and a driving unit is provided in the middle of the base plate 15, which includes a main cylinder body 18 and a sub-cylinder body 21. The sub-cylinder body 21 is arranged around the main cylinder body 18 in a circular ring, and one end of the sub-cylinder body 21 is connected to the main cylinder body 18. Pistons are provided in the main cylinder body 18 and the sub-cylinder body 21. When the movable orifice plate 12 moves downward, it will conflict with the first piston rod 20, thereby pushing the first piston rod 20 and the first piston 19 to move, and the first movable plate 12 moves downward. Under the influence of the plug 19, the gas in the main cylinder 18 enters the auxiliary cylinder 21 and pushes the second piston 22 and the second piston rod 23 to move. Under the push of the second piston 22, the transmission rack 16 is driven. As the transmission rack 16 moves, the support column 1503 and the transmission gear 1504 rotate. Driven by the support column 1503, the guide plate 1505 rotates. When the gas passes through the second through hole 1501 on the substrate 15 and flows to the catalyst, as the guide plate 1505 rotates, the direction of the airflow changes continuously. The guide plate 1505 also plays a stirring role, which can stir the gas in the gap between the substrate 15 and the catalyst 2, so as to make the gas and the catalyst 2 contact more evenly.

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

[0045] Example 3: This example is an explanation based on Example 2. For details, please refer to Figures 1 to 7 The driving unit includes a pressure head 24, which is fixedly connected to the movable orifice plate 12 through a connecting rod 40. A slot 25 is opened at the center of the base plate 15, and the position of the slot 25 matches the pressure head 24. A transmission rod 26 is provided in the slot 25, and an extension block 27 is provided at one end of the transmission rod 26. The other end of the transmission rod 26 is fixedly connected to the transmission rack 16, and the upper end of the extension block 27 is provided with an inclined surface.

[0046] This embodiment discloses another driving unit, which includes a pressure head 24, which is fixed on the movable orifice plate 12. When the movable orifice plate 12 moves downward, the pressure head 24 moves synchronously. At this time, the pressure head 24 will conflict with the inclined surface on the extension block 27 in the slot 25. Under the push of the pressure head 24, the extension block 27 moves with the transmission rod 26. 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, thereby achieving the purpose of causing the support column 1503 to rotate.

[0047] Example 4: This example is an explanation based on Example 2. For details, please refer to Figures 1 to 7 A pressure detection device is provided on one side of the rotating seat 7, and 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, and 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] 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 the air pipe 33 through a universal rotating pipe joint. One end of the air pipe 33 extends to the outside of the reactor body 1. Several suction ports 34 are arranged around the dredging teeth 11.

[0049] A cleaning seat 35 is provided on the lower side of the fixed hole plate 6 , and a plurality of brushes 36 are provided on the cleaning seat 35 . The brushes 36 are provided with notches that fit with the dredging teeth 11 .

[0050] 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 .

[0051] In order to facilitate the judgment of the blockage position of the vent 601, the present technical solution is provided with a pressure detection device on the rotating seat 7. The principle is that if the vent 601 is blocked, it will be difficult for the gas to pass through the vent 601. When the air flow passes through the vent 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 is rotatable. 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 be opposite to the vent 601. When the vent 601 is not blocked, the impact force of the air flow is large. At this time, the movable plate 28 will overcome the resistance of the support spring 31 and deflect significantly. The pressure measured by the pressure sensor 30 will be large. If the vent 601 is blocked, the impact force of the air flow will become smaller, and the pressure measured by the pressure sensor 30 will become smaller. At this time, the vent 601 can be dredged by the lifting seat 10 with the dredging teeth 11.

[0052] Specifically, the pressure sensor 30 is connected to the PLC controller. As the rotating seat 7 rotates, the movable plate 28 is positioned relative to the vent 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 small, it is determined that the vent 601 is blocked, and the rotating seat 7 rotates until the dredging tooth 11 is positioned relative to the vent 601. Then the electric push rod 9 works, and the dredging tooth 11 is inserted into the vent 601. The dredging tooth 11, the lifting seat 10, the connecting pipe 32, and the air pipe 33 are interconnected. The air pipe 33 is connected to a negative pressure fan. As the dredging tooth 11 moves, the negative pressure fan works. A suction port 34 is provided on the dredging tooth 11, and the debris generated during dredging can be cleaned through the suction port 34.

[0053] The connecting tube 32 is fixedly connected to the rotating seat 7, and one end thereof is slidingly connected to the lifting seat 10. A gear is provided on the connecting tube 32, and the driving motor 8 is transmission-connected to the connecting tube 32 through the gear. The driving motor 8 drives the connecting tube 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, the present technical solution provides a cleaning seat 35 on the lower side of the fixed hole plate 6. 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 by the brush 36.

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

[0056] S1. Hydrogen is delivered into the reaction chamber 101 by an air pump, and the controller adjusts the delivery volume at any time according to the measurement value of the hydrogen concentration detection sensor 102;

[0057] S2: After the hydrogen enters the reaction chamber 101, it first diffuses under the action of the first airflow distribution component, and then further diffuses under the action of the second airflow distribution component. During the diffusion process, the hydrogen mixes with the gaseous raw materials in the reactor, and finally the mixture contacts the catalyst 2 to complete the reaction;

[0058] S3. When rotating, the rotating seat 7 detects the blockage of the vent 601 through the pressure sensor 30. When blockage is found, the fixed hole plate 6 is cleared through the clearing teeth 11 to ensure the airflow dispersion effect.

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

[0060] It should be noted that, in this document, relational terms such as first and second, etc., are used only 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 terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An intelligent proportioning control system for mixed aromatic raw materials, comprising a reactor body, a reaction chamber provided inside the reactor body, a catalyst and a hydrogen concentration detection sensor provided in the reaction chamber, a feed pipe provided at the upper end of the reaction chamber, and a discharge pipe provided at the lower end of the reaction chamber, characterized in that: A first airflow distribution assembly is provided at the feed pipe, and the first airflow distribution assembly includes a guide cover, a fixed hole plate is provided on the lower side of the guide cover, and a plurality of groups of vent holes are provided on the fixed hole plate; A rotating seat is provided on the lower side of 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 plurality of dredging teeth are provided on the lifting seat, a piston rod of the electric push rod is fixedly connected to the lifting seat, a movable orifice plate is provided on the lower side of the rotating seat, and a second airflow distribution assembly is provided on the lower side of the movable orifice plate, the movable orifice plate is elastically connected to the reactor body through a first spring, and a plurality of protrusions are arranged around the upper end of the movable orifice plate; The second air flow distribution assembly includes a base, the base is fixedly connected to the reactor body, and a plurality of first through holes are provided on the base, first support rods are provided in the first through holes, and a guide column is provided on the first support rod, and the upper end of the guide column is tapered; The second airflow distribution assembly includes a base plate, which is fixedly connected to the reactor body and has a plurality of second through holes on the base plate. 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 in the base plate, and the transmission rack is elastically connected to the base plate through a second spring. The transmission rack passes through the second through hole and engages with the transmission gear. A guide plate is provided at the lower end of the support column, and a drive unit for driving the transmission rack to move is provided in the middle of the base plate.

2. An intelligent proportioning control system for mixed aromatic raw materials according to claim 1, characterized in that: The drive unit includes a main cylinder body, which is provided with several sub-cylinder bodies. The main cylinder body is provided with a first piston, and the first piston is elastically connected to the main cylinder body through a rebound spring. The first piston is provided with a first piston rod, and one end of the first piston rod extends to the outside of the main cylinder body. The sub-cylinder body is provided with a second piston, and the second piston is provided with a second piston rod, and one end of the second piston rod is fixedly connected to the transmission rack.

3. An intelligent proportioning control system for mixed aromatic raw materials according to claim 1, characterized in that: The driving unit includes a pressure head, which is fixedly connected to the movable orifice plate through a connecting rod. A slot is opened at the center of the base plate, and the position matches the pressure head. A transmission rod is provided in the slot. An extension block is provided at one end of the transmission rod, 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.

4. An 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, 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, and one end of the support plate is fixedly connected to the rotating seat. A pressure sensor and a support spring for supporting the movable plate are provided on the support plate.

5. An intelligent proportioning control system for mixed aromatic raw materials according to claim 4, characterized in that: The lifting seat and the dredging teeth are both hollow structures. One end of the dredging teeth is connected to the lifting seat. One end of the lifting seat is provided with a connecting pipe. One end of the connecting pipe is connected to the air pipe through a universal rotating pipe joint. One end of the air pipe extends to the outside of the reactor body. Several suction ports are arranged on the dredging teeth.

6. An intelligent proportioning control system for mixed aromatic raw materials according to claim 5, characterized in that: A cleaning seat is provided on the lower side of the fixed hole plate. A plurality of brushes are provided on the cleaning seat. Notches that fit with the dredging teeth are provided on the brushes.

7. An intelligent proportioning control system for mixed aromatic raw materials according to claim 1, characterized in that: A support is provided on the lower side of the reaction chamber, and a steel cage is provided on the support, and the catalyst is located in the steel cage.

8. The control method of an intelligent proportioning control system for mixed aromatic raw materials according to any one of claims 1 to 7, characterized in that: The steps include: S1. Hydrogen is delivered into the reaction chamber through an air pump, and the controller adjusts the gas delivery volume at any time according to the measurement value of the hydrogen concentration detection sensor; S2: After hydrogen enters the reaction chamber, 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; S3. When the rotating seat rotates, the pressure sensor is used to detect the blockage of the vent hole. When blockage is found, the fixed hole plate is cleared by the clearing teeth to ensure the airflow dispersion effect.

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