Vertical propane dehydrogenation reaction device

Abstract

The invention relates to the field of propane dehydrogenation, and discloses a vertical propane dehydrogenation reaction device which comprises a reaction cabinet with an opening structure at the top and a sealing cabinet cover fixedly mounted at the top of the reaction cabinet through bolts. Compared with the prior art, the device has the following advantages and effects that propane can be subjected to comprehensive and efficient desulfurization and dehydration pretreatment firstly, then the desulfurized and dehydrated propane is subjected to dehydrogenation reaction treatment, the activity of dehydrogenation reaction catalyst particles can be effectively improved, the service life of the dehydrogenation reaction catalyst particles can be effectively prolonged, and the corrosion influence on the interior of the reaction cabinet is greatly reduced; the dehydrogenation reaction quality is improved, the service life of equipment is prolonged, in the propane dehydrogenation reaction treatment process, dehydrogenation reaction catalyst particles can make more comprehensive and sufficient contact with propane, the dehydrogenation reaction rate and the conversion rate are increased, more sufficient and comprehensive dehydrogenation treatment on propane is achieved, and the product quality is improved. And the dehydrogenation reaction catalyst particles can be conveniently replaced, so that the operation steps of replacing the dehydrogenation reaction catalyst particles are greatly reduced, and the material replacement efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of propane dehydrogenation, and particularly relates to a vertical propane dehydrogenation reaction device. Background Art

[0002] A vertical propane dehydrogenation reaction device is a chemical engineering device used to convert propane into propylene. The principle of the propane dehydrogenation reaction is that the raw material propane enters the reaction cylinder, and under the action of high temperature, high pressure and a catalyst, the propane molecules break, generating propylene and hydrogen.

[0003] In the related art, although the traditional vertical propane dehydrogenation reaction device can meet the basic requirements of propane dehydrogenation reaction treatment, there are still at least the following deficiencies in the actual operation process: on the one hand, the contact between the dehydrogenation catalyst and propane in the vertical propane dehydrogenation reaction device is not sufficient, resulting in a low reaction rate and an unsatisfactory conversion rate of propylene, which affects the quality of propane dehydrogenation treatment; on the other hand, some raw material propane is doped with sulfides and water vapor. The vertical propane dehydrogenation reaction device lacks the function of pre-treating propane for desulfurization and dehydration. When propane carrying sulfides and water vapor directly enters the vertical propane dehydrogenation reaction device for dehydrogenation reaction, these sulfides will poison the catalyst, reducing the activity and service life of the catalyst. These water vapors will affect the progress of the dehydrogenation reaction and may also cause corrosion to the device, thereby increasing the replacement frequency and cost of the catalyst and shortening the service life of the device.

[0004] Therefore, we propose a vertical propane dehydrogenation reaction device to solve the above problems. Summary of the Invention

[0005] The purpose of the present application is to provide a vertical propane dehydrogenation reaction device, which can first perform comprehensive and efficient desulfurization and dehydration pre-treatment on propane, and then perform dehydrogenation reaction treatment on the propane after desulfurization and dehydration. It can effectively extend the activity and service life of the dehydrogenation reaction catalyst particles, greatly reduce the corrosion effect on the inside of the reaction cabinet, improve the quality of the dehydrogenation reaction and extend the service life of the equipment. During the dehydrogenation reaction treatment process, it can make the dehydrogenation reaction catalyst particles contact with propane more comprehensively and sufficiently, improve the dehydrogenation reaction rate and conversion rate, achieve more comprehensive and sufficient dehydrogenation treatment of propane, and can conveniently replace the dehydrogenation reaction catalyst particles, improving the refueling efficiency.

[0006] The above technical object of the present application is achieved through the following technical solutions: A vertical propane dehydrogenation reaction device includes a reaction cabinet with an open top structure and a sealed cabinet cover bolted and fixed to the top of the reaction cabinet. Legs are fixedly installed at the four corners of the bottom of the reaction cabinet. A first horizontal partition is fixedly installed inside the reaction cabinet. Two propane dehydrogenation reaction cylinders are fixedly installed on the first horizontal partition. The propane dehydrogenation reaction cylinders are used to contain dehydrogenation reaction catalyst particles. The tops of the two propane dehydrogenation reaction cylinders are both open structures and are both in sealed contact with the bottom of the sealed cabinet cover. The bottoms of the two propane dehydrogenation reaction cylinders both penetrate the first horizontal partition. A feeding mechanism is arranged on the reaction cabinet. The feeding mechanism is used to stir the dehydrogenation reaction catalyst particles to move inside the propane dehydrogenation reaction cylinders. The feeding mechanism includes two hollow vertical sleeves and two first spiral feeding shafts. The two hollow vertical sleeves are respectively fixedly installed inside the corresponding propane dehydrogenation reaction cylinders through brackets. The top of the hollow vertical sleeve is lower than the air outlet. The two first spiral feeding shafts are respectively rotatably installed inside the corresponding propane dehydrogenation reaction cylinders. A purification and pretreatment mechanism is arranged on one side of the reaction cabinet. The purification and pretreatment mechanism is used to remove sulfides and water vapor in propane. The purification and pretreatment mechanism includes a desulfurization tank, a cooling cylinder and a dehydration tank. The desulfurization tank and the dehydration tank are both fixedly installed on the outer wall of one side of the reaction cabinet. The desulfurization tank is located above the dehydration tank. The cooling cylinder is fixedly installed between the desulfurization tank and the dehydration tank. The cooling cylinder is used to contain cooling water.

[0007] A further setting of the present application is: A propane inlet pipe and a propane outlet pipe are fixedly installed on one side of the reaction cabinet. One end of the propane inlet pipe extends into the reaction cabinet and is located below the first horizontal partition. One end of the propane outlet pipe extends into the reaction cabinet and is located above the first horizontal partition. A plurality of uniformly distributed gas distribution pipes are fixedly installed at the bottoms of the two propane dehydrogenation reaction cylinders. The top of the gas distribution pipe is U-shaped and extends into the propane dehydrogenation reaction cylinder. A plurality of uniformly distributed air outlet holes are opened on the inner wall of the propane dehydrogenation reaction cylinder. An annular material blocking net is fixedly sleeved on the outer wall of the propane dehydrogenation reaction cylinder. The inner bottom wall of the propane dehydrogenation reaction cylinder is an arc-shaped surface structure with a concave middle. A plurality of uniformly distributed first electric heating tubes are fixedly installed on the inner walls of both sides of the reaction cabinet. A first temperature sensor is fixedly installed on the top of the first horizontal partition.

[0008] A further arrangement of the present application is as follows: The material feeding mechanism further includes two drive shafts, two gears, and a motor. The tops of the two first spiral feeding shafts respectively penetrate through the corresponding hollow vertical sleeves. The spiral directions of the two first spiral feeding shafts are arranged in opposite directions. The bottoms of the two first spiral feeding shafts respectively extend outside the corresponding propane dehydrogenation reaction cylinders. The two drive shafts are both rotatably installed on the bottom inner wall of the reaction cabinet. The tops of the two drive shafts are respectively fixedly connected to the bottoms of the corresponding first spiral feeding shafts. The bottoms of the two drive shafts both extend outside the reaction cabinet. The two gears are respectively fixedly sleeved on the corresponding drive shafts, and the two gears are both located below the reaction cabinet and mesh with each other. The same support plate is fixedly installed on the four legs. The motor is fixedly installed on the top of the support plate. The output shaft end of the motor is fixedly connected to the bottom end of one of the drive shafts.

[0009] A further arrangement of the present application is as follows: A material changing mechanism is provided at the top of the reaction cabinet. The material changing mechanism is used to replace the dehydrogenation reaction catalyst particles in the propane dehydrogenation reaction cylinder. The material changing mechanism includes two L-shaped frames, two hydraulic cylinders, two feeding cylinders, two shaft seats, two second spiral feeding shafts, two rectangular connecting rods, two discharging pipes, two discharging end covers, two feeding pipes, and two feeding end covers. The two L-shaped frames are both fixedly installed on the top of the sealed cabinet cover and are symmetrically arranged. The two hydraulic cylinders are respectively fixedly installed on the corresponding L-shaped frames. The two feeding cylinders are respectively fixedly installed on the output shaft ends of the corresponding hydraulic cylinders. The bottoms of the two feeding cylinders are both of an open structure. The two feeding cylinders are respectively located directly above the corresponding hollow vertical sleeves. Two sealing guide sleeves are fixedly sleeved on the top of the sealed cabinet cover. The bottoms of the two feeding cylinders respectively penetrate through the corresponding sealing guide sleeves and are respectively located inside the corresponding propane dehydrogenation reaction cylinders. The outer wall of the feeding cylinder is in sliding seal contact with the inner wall of the sealing guide sleeve. The two shaft seats are respectively fixedly installed on the top inner walls of the corresponding feeding cylinders. The two second spiral feeding shafts are respectively rotatably installed at the bottoms of the corresponding shaft seats. The two rectangular connecting rods are respectively fixedly installed at the bottoms of the corresponding second spiral feeding shafts. Rectangular grooves are respectively formed at the tops of the two first spiral feeding shafts. The bottoms of the two rectangular connecting rods respectively extend outside the corresponding feeding cylinders and are respectively slidably installed in the corresponding rectangular grooves. The two discharging pipes are respectively fixedly installed on one side of the two feeding cylinders close to each other. The two discharging end covers are respectively threadedly installed at one ends of the corresponding discharging pipes. The two feeding pipes are both fixedly installed on the front side wall of the reaction cabinet. One ends of the two feeding pipes both extend into the reaction cabinet and are respectively fixedly communicated with the corresponding propane dehydrogenation reaction cylinders. The two feeding end covers are respectively threadedly installed at the other ends of the corresponding feeding pipes.

[0010] A further arrangement of the present application is as follows: The inner diameter sizes of the two feeding cylinders are the same as the inner diameter sizes of the two hollow vertical sleeves. The spiral directions of the two second spiral feeding shafts are the same as the spiral directions of the corresponding first spiral feeding shafts respectively.

[0011] A further arrangement of the present application is as follows: The purification pretreatment mechanism further includes a second transverse partition plate, a heating assembly, a propane input pipe, a propane delivery assembly, a filter screen, and a transmission assembly. The second transverse partition plate is fixedly installed in the desulfurization tank. The upper part of the second transverse partition plate is used to place zinc oxide desulfurization agent particles. The heating assembly is arranged on the desulfurization tank and is used to heat the zinc oxide desulfurization agent particles in the desulfurization tank. The propane input pipe is fixedly installed on the top of the desulfurization tank, and one end of the propane input pipe extends into the desulfurization tank. The propane delivery assembly is arranged between the desulfurization tank, the cooling cylinder, and the dehydration tank, and is used to sequentially deliver the propane in the desulfurization tank to the cooling cylinder and the dehydration tank. The filter screen is fixedly installed in the dehydration tank. The space on the left side of the filter screen in the dehydration tank is used to hold molecular sieve particles. The end of the propane inlet pipe far from the reaction cabinet extends into the dehydration tank and is located on the right side of the filter screen. The transmission assembly is arranged below the dehydration tank and is used to control the rotation of the propane delivery assembly.

[0012] A further arrangement of the present application is as follows: The heating assembly includes two T-shaped seats, a hollow air distribution plate, two gas inlet connectors I, two gas inlet connectors II, a plurality of arc-shaped heat conduction pipes, an annular hollow air collection plate, a propane output pipe, two electric heating pipes II, and a bypass pipe. Both T-shaped seats are fixedly installed on the inner wall of the top of the desulfurization tank. The hollow air distribution plate is fixedly installed at the bottom of the two T-shaped seats. The end of the propane discharge pipe far from the reaction cabinet extends into the desulfurization tank and is fixedly connected to the top of the hollow air distribution plate. The propane discharge pipe is connected to the inside of the hollow air distribution plate. Both gas inlet connectors I are fixedly installed at the bottom of the hollow air distribution plate, and both gas inlet connectors I are connected to the inside of the hollow air distribution plate. Both gas inlet connectors II are fixedly installed on the top of the second transverse partition plate. The tops of a plurality of arc-shaped heat conduction pipes are fixedly connected to the bottoms of the two gas inlet connectors I and are evenly distributed. The bottoms of a plurality of arc-shaped heat conduction pipes are fixedly connected to the tops of the two gas inlet connectors II and are evenly distributed. The annular hollow air collection plate is fixedly installed at the bottom of the second transverse partition plate. The bottoms of both gas inlet connectors II penetrate through the second transverse partition plate and are fixedly installed on the top of the annular hollow air collection plate. Both gas inlet connectors II are connected to the inside of the annular hollow air collection plate. One end of the propane output pipe is fixedly connected to one side of the annular hollow air collection plate, and the other end of the propane output pipe extends outside the desulfurization tank. The tops of the two electric heating pipes II are respectively fixedly connected to the central parts of the bottoms of the corresponding gas inlet connectors I, and the bottoms of the two electric heating pipes II are respectively fixedly connected to the central parts of the tops of the corresponding gas inlet connectors I. Both ends of the bypass pipe are respectively fixedly connected to the propane output pipe and the propane discharge pipe. A one-way bypass valve is fixedly installed on the bypass pipe. A temperature sensor II is fixedly installed on the inner wall of the top of the desulfurization tank.

[0013] A further arrangement of the present application is as follows: The propane delivery assembly includes a hollow vertical shaft I, a spherical intake mesh cover, a sealing plate I, a plurality of serpentine heat dissipation tubes, a hollow vertical shaft II, a sealing plate II, a plurality of spherical outlet heads, and a sealing plate III. The hollow vertical shaft I is rotatably installed on the bottom inner wall of the desulfurization tank. The top end of the hollow vertical shaft I rotatably penetrates through the second transverse partition and is located between the two gas delivery connectors II. The spherical intake mesh cover is fixedly installed at the top end of the hollow vertical shaft I. A stirring frame is fixedly installed at the central part of the top of the spherical intake mesh cover. A plurality of uniformly distributed inclined stirring rods are fixedly installed on the outer side wall of the spherical intake mesh cover. The bottom end of the hollow vertical shaft I extends into the cooling cylinder. The sealing plate I is fixedly installed at the bottom end of the hollow vertical shaft I. The plurality of serpentine heat dissipation tubes are all located in the cooling cylinder and are uniformly distributed. The hollow vertical shaft II is rotatably installed in the dehydration tank and is located on the left side of the filter screen. The top end of the hollow vertical shaft II extends into the cooling cylinder. The sealing plate II is fixedly installed at the top end of the hollow vertical shaft II. The top ends of the plurality of serpentine heat dissipation tubes are fixedly communicated with the hollow vertical shaft I, and the bottom ends of the plurality of serpentine heat dissipation tubes are fixedly communicated with the hollow vertical shaft II. The plurality of spherical outlet heads are all fixedly installed on the hollow vertical shaft II and are uniformly distributed, and the plurality of spherical outlet heads are all located in the dehydration tank. The bottom end of the hollow vertical shaft II extends outside the dehydration tank. The sealing plate III is fixedly installed at the bottom end of the hollow vertical shaft II.

[0014] A further arrangement of the present application is as follows: The transmission assembly includes a transmission shaft, a driven belt pulley, a driving belt pulley, and a belt. The transmission shaft is fixedly installed at the bottom of the sealing plate III. The driven belt pulley is fixedly sleeved on the transmission shaft. The driving belt pulley is fixedly sleeved at the bottom end of one of the driving shafts. The belt is wound around the driven belt pulley and the driving belt pulley.

[0015] A further arrangement of the present application is as follows: An inspection opening I is provided on the front side wall of the desulfurization tank above the second transverse partition. An inspection door I is fixedly installed on the front side wall of the desulfurization tank by bolts. The inspection door I is adapted to the inspection opening I. A cooling water inlet pipe and a cooling water discharge pipe are fixedly installed on the front side wall of the cooling cylinder. The cooling water inlet pipe is located above the cooling water discharge pipe. Flow regulating valves are fixedly installed on both the cooling water inlet pipe and the cooling water discharge pipe. An inspection opening II is provided on the front side wall of the dehydration tank on the left side of the filter screen. An inspection door II is fixedly installed on the front side wall of the desulfurization tank by bolts. The inspection door II is adapted to the inspection opening II.

[0016] The present application includes at least one of the following beneficial technical effects:

[0017] 1. By using the material dialing mechanism in the present application, during the propane dehydrogenation reaction process, the catalyst particles for the dehydrogenation reaction can be made to contact propane more comprehensively and sufficiently, improving the dehydrogenation reaction rate and conversion rate, and realizing a more comprehensive and sufficient dehydrogenation treatment of propane.

[0018] 2. By using the purification pretreatment mechanism, this application can first perform desulfurization and dehydration pretreatment on propane, and then perform dehydrogenation reaction treatment on the propane after desulfurization and dehydration. This can effectively extend the activity and service life of the dehydrogenation reaction catalyst particles, greatly reduce the corrosion impact on the interior of the reaction cabinet, improve the quality of the dehydrogenation reaction, and extend the service life of the equipment.

[0019] 3. By using the heating component, this application can heat the zinc oxide desulfurizer particles in the desulfurization box by using the heat in the mixed gas of propylene and hydrogen. This heating method realizes the recovery and utilization of the waste heat of the mixed gas of propylene and hydrogen, reduces energy consumption, improves energy utilization efficiency, and has an energy-saving effect.

[0020] 4. Through the combined action of the propane delivery component and the transmission component, during the desulfurization and dehydration pretreatment of propane, the zinc oxide desulfurizer particles can be toggled to move, enabling propane to come into full and comprehensive contact with the zinc oxide desulfurization particles, achieving comprehensive and efficient desulfurization pretreatment of propane. The heat in the propane after desulfurization can be transferred to the cooling water in the cooling cylinder more quickly and comprehensively, realizing more efficient cooling of the propane after desulfurization. Also, the water carried in the propane after desulfurization and cooling can come into more comprehensive and sufficient contact with the molecular sieve particles, and the molecular sieve particles can comprehensively and effectively adsorb the water carried in the propane, achieving comprehensive and efficient dehydration pretreatment of propane.

[0021] 5. By using the refueling mechanism, this application can achieve convenient replacement of the dehydrogenation reaction catalyst particles, greatly reducing the operation steps for replacing the dehydrogenation reaction catalyst particles and improving the refueling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional structural schematic diagram of the first embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0023] Figure 2 is a cross-sectional structural schematic diagram of the first perspective of the first embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0024] Figure 3 is a cross-sectional structural schematic diagram of the second perspective of the first embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0025] Figure 4 is a front cross-sectional structural schematic diagram of the propane dehydrogenation reaction cylinder in the first embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0026] Figure 5 is a three-dimensional structural schematic diagram of the material shifting mechanism in the first embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0027] Figure 6 It is a partial three-dimensional structural schematic diagram of the charging mechanism in the first embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0028] Figure 7 It is a three-dimensional structural schematic diagram of the second embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0029] Figure 8 It is a front sectional structural schematic diagram of the second embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0030] Figure 9 It is a three-dimensional structural schematic diagram of the material changing mechanism in the second embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0031] Figure 10 It is a front sectional structural schematic diagram of the material changing mechanism in the second embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0032] Figure 11 Three-dimensional structural schematic diagram of the first spiral feeding shaft in the second embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0033] Figure 12 Three-dimensional structural schematic diagram of the second spiral feeding shaft and the rectangular connecting rod in the second embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0034] Figure 13 It is a three-dimensional structural schematic diagram of the third embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0035] Figure 14 It is a front structural schematic diagram of the purification pretreatment mechanism in the third embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0036] Figure 15 It is a three-dimensional structural schematic diagram of the heating component in the third embodiment of the vertical propane dehydrogenation reaction device provided by this application;

[0037] Figure 16 It is a three-dimensional structural schematic diagram of the propane conveying component in the third embodiment of the vertical propane dehydrogenation reaction device provided by this application.

[0038] In the figure, 1 is a reaction cabinet; 2 is a supporting leg; 3 is a sealed cabinet cover; 4 is a first horizontal partition board; 5 is a propane dehydrogenation reaction cylinder; 6 is a propane inlet pipe; 7 is a propane discharge pipe; 8 is a gas distribution pipe; 9 is an air outlet; 10 is an annular material retaining net; 11 is a material feeding mechanism; 111 is a support; 112 is a hollow vertical sleeve; 113 is a first spiral feeding shaft; 1131 is a rectangular groove; 114 is a driving shaft; 115 is a gear; 116 is an electric motor; 117 is a support plate; 12 is a first electric heating tube; 13 is a material changing mechanism; 131 is an L-shaped frame; 132 is a hydraulic cylinder; 133 is a feeding cylinder; 134 is a shaft seat; 135 is a second spiral feeding shaft; 136 is a rectangular connecting rod; 137 is a discharge pipe; 138 is a discharge end cover; 139 is a feeding pipe; 1391 is a feeding end cover; 14 is a sealing guide sleeve; 15 is a desulfurization box; 16 is a cooling cylinder; 17 is a dewatering box; 18 is a second horizontal partition board; 19 is a heating assembly; 191 is a T-shaped seat; 192 is a hollow air distribution plate; 193 is a first gas transmission joint; 194 is a second gas transmission joint; 195 is an arc-shaped heat conduction tube; 196 is an annular hollow gas collecting plate; 197 is a propane output pipe; 198 is a second electric heating tube; 199 is a bypass pipe; 20 is a propane input pipe; 21 is a propane conveying assembly; 211 is a first hollow vertical shaft; 212 is a spherical air inlet mesh cover; 2121 is a stirring frame; 2122 is an inclined stirring rod; 213 is a first blocking plate; 214 is a serpentine heat dissipation tube; 215 is a second hollow vertical shaft; 216 is a second blocking plate; 217 is a spherical air outlet head; 218 is a third blocking plate; 22 is a filter screen; 23 is a transmission shaft; 24 is a driven pulley; 25 is a driving pulley; 26 is a belt; 27 is a first maintenance door; 28 is a cooling water inlet pipe; 29 is a cooling water discharge pipe; 30 is a second maintenance door. Specific embodiments

[0039] The technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0040] First embodiment

[0041] See Figures 1-6, in the first embodiment of the present application, the vertical propane dehydrogenation reaction device includes: a reaction cabinet 1 with an open top structure and a sealed cabinet cover 3 bolted and fixed to the top of the reaction cabinet 1. Installing and fixing the sealed cabinet cover 3 on the top of the reaction cabinet 1 with bolts facilitates the convenient disassembly and assembly of the sealed cabinet cover 3, so as to facilitate the inspection and maintenance of the interior of the reaction cabinet 1. Legs 2 are fixedly installed at the four corners of the bottom of the reaction cabinet 1. The reaction cabinet 1 can be stably supported at an appropriate height position on the ground by using the four legs 2. A first horizontal partition 4 is fixedly installed inside the reaction cabinet 1. The first horizontal partition 4 is used to divide the interior space of the reaction cabinet 1 into two parts. The space above the first horizontal partition 4 is used for dehydrogenation reaction, and the space below the first horizontal partition 4 is used for the propane to be dehydrogenated to enter. Two propane dehydrogenation reaction cylinders 5 are fixedly installed on the first horizontal partition 4. The propane dehydrogenation reaction cylinders 5 are used to contain dehydrogenation reaction catalyst particles. The tops of the two propane dehydrogenation reaction cylinders 5 are both of open structures and are both in sealed contact with the bottom of the sealed cabinet cover 3. The sealed cabinet cover 3 can be used to seal the top openings of the two propane dehydrogenation reaction cylinders 5. The bottoms of the two propane dehydrogenation reaction cylinders 5 both penetrate the first horizontal partition 4. A plurality of uniformly distributed gas distribution pipes 8 are fixedly installed at the bottoms of the two propane dehydrogenation reaction cylinders 5. The top ends of the gas distribution pipes 8 are in a U-shaped configuration and extend into the propane dehydrogenation reaction cylinders 5. By using the plurality of gas distribution pipes 8, the propane to be dehydrogenated can be evenly transported into the two propane dehydrogenation reaction cylinders 5, so that the propane to be dehydrogenated can flow upward in the propane dehydrogenation reaction cylinders 5. Under the action of high temperature, high pressure and dehydrogenation reaction catalyst particles, the propane molecules are broken, generating a mixed gas of propylene and hydrogen, achieving the effect of propane dehydrogenation reaction. A propane inlet pipe 6 and a propane outlet pipe 7 are fixedly installed on one side of the reaction cabinet 1. One end of the propane inlet pipe 6 extends into the reaction cabinet 1 and is located below the first horizontal partition 4. The propane inlet pipe 6 is used to transport the propane to be dehydrogenated into the space below the first horizontal partition 4 inside the reaction cabinet 1. One end of the propane outlet pipe 7 extends into the reaction cabinet 1 and is located above the first horizontal partition 4. The propane outlet pipe 7 is used to discharge the mixed gas of propylene and hydrogen generated after propane dehydrogenation treatment. A plurality of uniformly distributed air outlet holes 9 are opened on the inner wall of the propane dehydrogenation reaction cylinder 5. An annular material blocking net 10 is fixedly sleeved on the outer wall of the propane dehydrogenation reaction cylinder 5. The annular material blocking net 10 is used to block and intercept the dehydrogenation reaction catalyst particles from being discharged through the air outlet holes 9. The air outlet holes 9 are provided to transport the mixed gas of propylene and hydrogen to the outside of the propane dehydrogenation reaction cylinder 5. The bottom inner wall of the propane dehydrogenation reaction cylinder 5 is of an arc-shaped surface structure with a concave middle part.

[0042] In this embodiment, a material shifting mechanism 11 is provided on the reaction cabinet 1. The material shifting mechanism 11 is used to shift the dehydrogenation reaction catalyst particles to move in the propane dehydrogenation reaction cylinder 5, so that the dehydrogenation reaction catalyst particles can contact the propane entering the propane dehydrogenation reaction cylinder 5 more comprehensively and fully, improving the dehydrogenation reaction rate and conversion rate, and realizing a more comprehensive and sufficient dehydrogenation treatment of propane. A plurality of uniformly distributed first electric heating tubes 12 are fixedly installed on the inner walls of both sides of the reaction cabinet 1. A first temperature sensor is fixedly installed on the top of the first horizontal partition 4. By using the plurality of first electric heating tubes 12, the space above the first horizontal partition 4 in the reaction cabinet 1 can be heated, and the temperature value of the space above the first horizontal partition 4 can be monitored in real time by using the first temperature sensor, so as to facilitate the precise control of the temperature during the dehydrogenation reaction, and control the propane dehydrogenation reaction temperature between 550°C and 650°C, providing suitable temperature conditions for the propane dehydrogenation reaction and ensuring the stable progress of the reaction. Among them:

[0043] The material shifting mechanism 11 includes two hollow vertical sleeves 112, two first spiral feeding shafts 113, two drive shafts 114, two gears 115 and a motor 116. The two hollow vertical sleeves 112 are respectively fixedly installed in the corresponding propane dehydrogenation reaction cylinders 5 through brackets 111. The top ends of the hollow vertical sleeves 112 are lower than the air outlet holes 9. The two first spiral feeding shafts 113 are respectively rotatably installed in the corresponding propane dehydrogenation reaction cylinders 5. The top ends of the two first spiral feeding shafts 113 respectively penetrate through the corresponding hollow vertical sleeves 112. The spiral directions of the two first spiral feeding shafts 113 are set to be opposite. The bottom ends of the two first spiral feeding shafts 113 respectively extend to the outside of the corresponding propane dehydrogenation reaction cylinders 5. The two drive shafts 114 are both rotatably installed on the bottom inner wall of the reaction cabinet 1. The top ends of the two drive shafts 114 are respectively fixedly connected to the bottom ends of the corresponding first spiral feeding shafts 113. The bottom ends of the two drive shafts 114 both extend to the outside of the reaction cabinet 1. The two gears 115 are respectively fixedly sleeved on the corresponding drive shafts 114, and the two gears 115 are both located below the reaction cabinet 1 and mesh with each other. The same support plate 117 is fixedly installed on the four legs 2. The motor 116 is fixedly installed on the top of the support plate 117. The output shaft end of the motor 116 is fixedly connected to the bottom end of one of the drive shafts 114. The motor 116 is used to control the rotation of the drive shaft 114 fixedly connected to its output shaft end. By using the meshing action of the two gears 115, the two drive shafts 114 can be controlled to drive the corresponding first spiral feeding shafts 113 to rotate simultaneously, and the rotation directions of the two first spiral feeding shafts 113 are opposite. By setting the spiral directions of the two first spiral feeding shafts 113 to be opposite, it can be ensured that both of the two first spiral feeding shafts 113 can transport the dehydrogenation reaction catalyst particles to move upward in the corresponding hollow vertical sleeves 112, thereby increasing the movement range of the dehydrogenation reaction catalyst particles in the two propane dehydrogenation reaction cylinders 5.

[0044] In this embodiment, through the above structure, when the vertical propane dehydrogenation reaction device provided by the present application is in use, a plurality of electric heating tubes 12 are turned on and energized to heat the space above the first horizontal partition 4 in the reaction cabinet 1. The temperature sensor 1 can be used to monitor the temperature value of the space above the first horizontal partition 4 in real time. When the temperature value of the space above the first horizontal partition 4 reaches the required reaction condition range, propane is controlled to enter the reaction cabinet 1 through the propane inlet pipe 6 and is located in the space below the first horizontal partition 4. At this time, the propane is divided into two parts through a plurality of gas distribution pipes 8 and enters the two propane dehydrogenation reaction cylinders 5 to flow upward from bottom to top. The propane contacts the dehydrogenation reaction catalyst particles and reacts under the action of appropriate high temperature and high pressure, causing the propane molecules to break, generating a mixed gas of propylene and hydrogen, and realizing the propane dehydrogenation reaction treatment. The mixed gas of propylene and hydrogen generated by the propane dehydrogenation reaction first passes through a plurality of air outlet holes 9 and is discharged outside the propane dehydrogenation reaction cylinder 5. By using the annular baffle net 10, the dehydrogenation reaction catalyst particles can be blocked and intercepted from being discharged through the air outlet holes 9. The mixed gas of propylene and hydrogen then passes through the propane discharge pipe 7 and is discharged, so as to facilitate the subsequent separation and purification operations of propylene and hydrogen;

[0045] During the process of propane dehydrogenation reaction treatment, by controlling the operation of the motor 116, the output shaft end of the motor 116 drives the drive shaft 114 fixedly connected thereto to rotate. Under the meshing action of the two gears 115, the two drive shafts 114 can be controlled to drive the corresponding first spiral feeding shafts 113 to rotate simultaneously, and the rotation directions of the two first spiral feeding shafts 113 are opposite. By setting the spiral directions of the two first spiral feeding shafts 113 to be opposite, under the rotation action of the two first spiral feeding shafts 113, the dehydrogenation reaction catalyst particles in the corresponding propane dehydrogenation reaction cylinder 5 can be conveyed to move continuously upward from bottom to top in the corresponding hollow vertical sleeves 112, which can increase the movement range of the dehydrogenation reaction catalyst particles in the two propane dehydrogenation reaction cylinders 5. Then, when propane enters the propane dehydrogenation reaction cylinder 5, the dehydrogenation reaction catalyst particles can be made to contact propane more comprehensively and fully, improving the dehydrogenation reaction rate and conversion rate, and realizing more comprehensive and sufficient dehydrogenation treatment of propane.

[0046] Second Embodiment

[0047] Based on the vertical propane dehydrogenation reaction device provided in the first embodiment of the present application, the second embodiment of the present application proposes another vertical propane dehydrogenation reaction device. The second embodiment is only a preferred mode of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0048] The following further describes the second embodiment of the present application in conjunction with the drawings and embodiments.

[0049] See Figures 7-12, in the vertical propane dehydrogenation reaction device: a charging mechanism 13 is arranged at the top of the reaction cabinet 1. The charging mechanism 13 is used to replace the dehydrogenation reaction catalyst particles in the propane dehydrogenation reaction cylinder 5, achieving the effect of conveniently replacing the dehydrogenation reaction catalyst particles, greatly reducing the operation steps of replacing the dehydrogenation reaction catalyst particles, and improving the charging efficiency, where:

[0050] The charging mechanism 13 includes two L-shaped frames 131, two hydraulic cylinders 132, two feeding cylinders 133, two shaft seats 134, two second spiral feeding shafts 135, two rectangular connecting rods 136, two discharging pipes 137, two discharging end covers 138, two feeding pipes 139 and two feeding end covers 1391. The two L-shaped frames 131 are both fixedly installed on the top of the sealing cabinet cover 3 and are symmetrically arranged. The two hydraulic cylinders 132 are respectively fixedly installed on the corresponding L-shaped frames 131. The two feeding cylinders 133 are respectively fixedly installed at the output shaft ends of the corresponding hydraulic cylinders 132. The bottom ends of the two feeding cylinders 133 are both of an open structure. The two feeding cylinders 133 are respectively located directly above the corresponding hollow vertical sleeves 112. Two sealing guide sleeves 14 are fixedly sleeved on the top of the sealing cabinet cover 3. The bottom ends of the two feeding cylinders 133 respectively penetrate through the corresponding sealing guide sleeves 14 and are respectively located inside the corresponding propane dehydrogenation reaction cylinders 5. The outer wall of the feeding cylinder 133 is in sliding seal contact with the inner wall of the sealing guide sleeve 14. The two shaft seats 134 are respectively fixedly installed on the inner walls of the tops of the corresponding feeding cylinders 133. The two second spiral feeding shafts 135 are respectively rotatably installed at the bottoms of the corresponding shaft seats 134. The two rectangular connecting rods 136 are respectively fixedly installed at the bottom ends of the corresponding second spiral feeding shafts 135. Rectangular grooves 1131 are respectively formed at the top ends of the two first spiral feeding shafts 113. The bottom ends of the two rectangular connecting rods 136 respectively extend outside the corresponding feeding cylinders 133 and are respectively slidably installed in the corresponding rectangular grooves 1131. The two discharging pipes 137 are respectively fixedly installed on one side of the two feeding cylinders 133 close to each other. The two discharging end covers 138 are respectively threadedly installed at one ends of the corresponding discharging pipes 137. The two feeding pipes 139 are both fixedly installed on the front side wall of the reaction cabinet 1. One ends of the two feeding pipes 139 respectively extend into the reaction cabinet 1 and are respectively fixedly communicated with the corresponding propane dehydrogenation reaction cylinders 5. The two feeding end covers 1391 are respectively threadedly installed at the other ends of the corresponding feeding pipes 139. By utilizing the retractable feature of the hydraulic cylinder 132, the corresponding feeding cylinder 133 can be controlled to move vertically, so as to adjust the height of the feeding cylinder 133. By utilizing the sliding connection and cooperation between the rectangular connecting rod 136 and the rectangular groove 1131 at the top end of the first spiral feeding shaft 113 directly below it, it can not only ensure that the first spiral feeding shaft 113 drives the second spiral feeding shaft 135 directly above it to rotate synchronously, but also ensure that the feeding cylinder 133 drives the shaft seat 134 and the second spiral feeding shaft 135 installed therein to move vertically smoothly. The discharging pipe 137 is provided to facilitate the discharge of the used dehydrogenation reaction catalyst particles in the propane dehydrogenation reaction cylinder 5. The discharging end cover 138 is used to seal and block one end of the discharging pipe 137. The feeding pipe 139 is provided to facilitate the addition of new dehydrogenation reaction catalyst particles into the propane dehydrogenation reaction cylinder 5. The feeding end cover 1391 is used to seal and block one end of the feeding pipe 139.

[0051] In this embodiment, in order to ensure the smooth and efficient replacement of the dehydrogenation reaction catalyst particles, the inner diameter sizes of the two feeding cylinders 133 are set to be the same as those of the two hollow vertical sleeves 112, and the spiral directions of the two second spiral feeding shafts 135 are the same as those of the corresponding first spiral feeding shafts 113 respectively.

[0052] In this embodiment, with the above structure, when the vertical propane dehydrogenation reaction device provided by the present application needs to replace the dehydrogenation reaction catalyst particles in the two propane dehydrogenation reaction cylinders 5 during long-term use, first control the two hydraulic cylinders 132 to extend and operate, and then the corresponding feeding cylinders 133 can be respectively pushed to move vertically downward. The shaft seats 134, the second spiral feeding shafts 135 and the rectangular connecting rods 136 in the feeding cylinders 133 will move downward accordingly, so that the bottom end of the rectangular connecting rod 136 gradually slides down into the rectangular groove 1131. When the bottoms of the two feeding cylinders 133 respectively move down to tightly abut against the tops of the corresponding propane dehydrogenation reaction cylinders 5, at this time, the two feeding cylinders 133 can no longer continue to move downward, and then stop the operation of the two hydraulic cylinders 132. Then, unscrew the two discharge end covers 138, control the motor 116 to operate, and under the meshing action of the two gears 115, the two first spiral feeding shafts 113 can be controlled to rotate simultaneously. Under the connection and cooperation of the rectangular connecting rod 136 and the rectangular groove 1131, the two second spiral feeding shafts 135 can be made to rotate accordingly. At this time, the dehydrogenation reaction catalyst particles are first continuously conveyed upward in the hollow vertical sleeve 112 under the rotation of the first spiral feeding shaft 113. When the dehydrogenation reaction catalyst particles are conveyed upward into the feeding cylinder 133, they are continuously conveyed upward under the rotation of the second spiral feeding shaft 135. Finally, the dehydrogenation reaction catalyst particles can be discharged from the discharge pipe 137, thereby achieving the effect of automatically conveying the dehydrogenation reaction catalyst particles in the propane dehydrogenation reaction cylinder 5 out. When all the dehydrogenation reaction catalyst particles in the propane dehydrogenation reaction cylinder 5 are conveyed out, stop the operation of the motor 116, screw the two discharge end covers 138 back onto the corresponding discharge pipes 137 respectively, and then control the two hydraulic cylinders 132 to contract and reset, so as to control the feeding cylinders 133 to move vertically upward and return to their positions. The shaft seats 134, the second spiral feeding shafts 135 and the rectangular connecting rods 136 in the feeding cylinders 133 will move upward and return to their positions accordingly. Then, unscrew the two feeding end covers 1391, and new dehydrogenation reaction catalyst particles can be poured into the two propane dehydrogenation reaction cylinders 5 respectively from the two feeding pipes 139. After the feeding is completed, screw the two feeding end covers 1391 back onto the corresponding feeding pipes 139, and the replacement operation of the dehydrogenation reaction catalyst particles is completed, thereby achieving the effect of conveniently replacing the dehydrogenation reaction catalyst particles, greatly reducing the operation steps of replacing the dehydrogenation reaction catalyst particles, and improving the feeding efficiency.

[0053] Third Embodiment

[0054] Based on the vertical propane dehydrogenation reaction device provided in the first and second embodiments of the present application, the third embodiment of the present application proposes another vertical propane dehydrogenation reaction device. The third embodiment is merely a preferred mode of the first embodiment or the second embodiment, and the implementation of the third embodiment will not affect the individual implementation of the first embodiment or the second embodiment.

[0055] The following further describes the third embodiment of the present application in conjunction with the drawings and embodiments.

[0056] See Figures 13-16 , in the vertical propane dehydrogenation reaction device: a purification and pretreatment mechanism is provided on one side of the reaction cabinet 1. The purification and pretreatment mechanism is used to remove sulfides and water vapor in propane, improve the purity of propane, effectively extend the activity and service life of the dehydrogenation reaction catalyst particles, and greatly reduce the corrosion effect on the inside of the reaction cabinet 1, improve the dehydrogenation reaction quality and extend the service life of the equipment. Among them:

[0057] The purification and pretreatment mechanism includes a desulfurization box 15, a cooling cylinder 16, a dehydration box 17, a second transverse partition 18, a heating component 19, a propane input pipe 20, a propane conveying component 21, a filter screen 22 and a transmission component. The desulfurization box 15 and the dehydration box 17 are both fixedly installed on the outer wall of one side of the reaction cabinet 1. The desulfurization box 15 is located above the dehydration box 17. The cooling cylinder 16 is fixedly installed between the desulfurization box 15 and the dehydration box 17. The cooling cylinder 16 is used to hold cooling water. The second transverse partition 18 is fixedly installed in the desulfurization box 15. The second transverse partition 18 is used to divide the internal space of the desulfurization box 15 into two spaces. The space above the second transverse partition 18 is used to place zinc oxide desulfurizer particles. The heating component 19 is arranged on the desulfurization box 15. The heating component is used to heat the zinc oxide desulfurizer particles in the desulfurization box 15. The propane input pipe 20 is fixedly installed on the top of the desulfurization box 15. One end of the propane input pipe 20 extends into the desulfurization box 15. The propane input pipe 20 is used to first transport the propane to be dehydrogenated to the desulfurization box 15. Under the action of a certain high temperature, pressure and zinc oxide desulfurizer particles in the space above the second transverse partition 18 in the desulfurization box 15, the sulfides in the propane can be first desulfurized. The propane conveying component 21 is arranged between the desulfurization box 15, the cooling cylinder 16 and the dehydration box 17. The propane conveying component 21 is used to sequentially transport the propane in the desulfurization box 15 to the cooling cylinder 16 and the dehydration box 17. The filter screen 22 is fixedly installed in the dehydration box 17. The space on the left side of the filter screen 22 in the dehydration box 17 is used to hold molecular sieve particles. One end of the propane inlet pipe 6 away from the reaction cabinet 1 extends into the dehydration box 17 and is located on the right side of the filter screen 22. The filter screen 22 can intercept and block the molecular sieve particles and dust impurities to prevent the molecular sieve particles and dust impurities from entering the reaction cabinet 1 through the propane inlet pipe 6. The transmission component is arranged below the dehydration box 17. The transmission component is used to control the rotation of the propane conveying component 21.

[0058] In this embodiment, the heating component 19 can heat the zinc oxide desulfurization agent particles in the desulfurization tank 15 in two heating modes. The first mode is to heat the zinc oxide desulfurization agent particles by the heat generated by energizing two second electric heating tubes 198. The second mode is to heat the zinc oxide desulfurization agent particles in the desulfurization tank 15 by the heat in the mixed gas of propylene and hydrogen discharged from the propane discharge pipe 7. Among them: the heating mode of the first mode is used in the early stage of the propane dehydrogenation reaction, and the heating mode of the second mode is used in the middle and late stages of the propane dehydrogenation reaction. The heating mode of the second mode realizes the recovery and utilization of waste heat, reduces energy consumption, improves energy utilization rate, and has an energy-saving effect. The heating component 19 includes two T-shaped seats 191, a hollow air distribution plate 192, two first gas transmission joints 193, two second gas transmission joints 194, a plurality of arc-shaped heat conduction tubes 195, a ring-shaped hollow gas collection plate 196, a propane output pipe 197, two second electric heating tubes 198, and a bypass pipe 199. Both of the two T-shaped seats 191 are fixedly installed on the inner wall of the top of the desulfurization tank 15. The hollow air distribution plate 192 is fixedly installed at the bottom of the two T-shaped seats 191. One end of the propane discharge pipe 7 far from the reaction cabinet 1 extends into the desulfurization tank 15 and is fixedly connected to the top of the hollow air distribution plate 192. The propane discharge pipe 7 is connected to the inside of the hollow air distribution plate 192. Both of the two first gas transmission joints 193 are fixedly installed at the bottom of the hollow air distribution plate 192. Both of the two first gas transmission joints 193 are connected to the inside of the hollow air distribution plate 192. Both of the two second gas transmission joints 194 are fixedly installed on the top of the second partition plate 18. The tops of a plurality of arc-shaped heat conduction tubes 195 are fixedly connected to the bottoms of the two first gas transmission joints 193 and are evenly distributed. The bottoms of a plurality of arc-shaped heat conduction tubes 195 are fixedly connected to the tops of the two second gas transmission joints 194 and are evenly distributed. The ring-shaped hollow gas collection plate 196 is fixedly installed at the bottom of the second partition plate 18. The bottoms of the two second gas transmission joints 194 both penetrate through the second partition plate 18 and are fixedly installed on the top of the ring-shaped hollow gas collection plate 196. Both of the two second gas transmission joints 194 are connected to the inside of the ring-shaped hollow gas collection plate 196. One end of the propane output pipe 197 is fixedly connected to one side of the ring-shaped hollow gas collection plate 196. The other end of the propane output pipe 197 extends outside the desulfurization tank 15. The propane output pipe 197 is used to transport the mixed gas of propylene and hydrogen to the subsequent purification equipment for the separation and purification operations of propylene and hydrogen. The tops of the two second electric heating tubes 198 are respectively fixedly connected to the central parts of the bottoms of the corresponding first gas transmission joints 193. The bottoms of the two second electric heating tubes 198 are respectively fixedly connected to the central parts of the tops of the corresponding first gas transmission joints 193. Both ends of the bypass pipe 199 are respectively fixedly connected to the propane output pipe 197 and the propane discharge pipe 7. A one-way bypass valve is fixedly installed on the bypass pipe 199. A second temperature sensor is fixedly installed on the inner wall of the top of the desulfurization tank 15. By using the bypass pipe 199 and the one-way bypass valve, the intake air volume of the mixed gas of propylene and hydrogen entering the hollow air distribution plate 192 can be adjusted.A part of the propylene and hydrogen mixed gas directly flows through the bypass pipe 199 into the propane output pipe 197 for transportation. The second temperature sensor is used to monitor the temperature value in the space above the second horizontal partition plate 18 in the desulfurization box 15 in real time, so as to control the desulfurization temperature range of the zinc oxide desulfurization agent to be 200°C to 400°C. Since the desulfurization reaction is an exothermic reaction, the temperature of the zinc oxide desulfurization agent particles may increase during the reaction process. By adjusting the intake air volume of the propylene and hydrogen mixed gas entering the hollow air distribution plate 192 to control the temperature, it is possible to prevent the temperature from being too high and affecting the desulfurization effect and the stability of the zinc oxide desulfurization agent particles, and achieve better desulfurization pre-purification treatment of propane.

[0059] In this embodiment, the propane delivery assembly 21 includes a hollow vertical shaft one 211, a spherical intake mesh cover 212, a sealing plate one 213, a plurality of serpentine heat dissipation tubes 214, a hollow vertical shaft two 215, a sealing plate two 216, a plurality of spherical outlet heads 217, and a sealing plate three 218. The hollow vertical shaft one 211 is rotatably installed on the bottom inner wall of the desulfurization tank 15. The top end of the hollow vertical shaft one 211 rotatably penetrates through the second horizontal partition 18 and is located between the two gas delivery connectors two 194. The spherical intake mesh cover 212 is fixedly installed at the top end of the hollow vertical shaft one 211. The spherical intake mesh cover 212 can intercept and block the zinc oxide desulfurizer particles from entering the hollow vertical shaft one 211, and can allow the desulfurized propane to enter the hollow vertical shaft one 211 through the mesh holes on the spherical intake mesh cover 212. A stirring frame 2121 is fixedly installed at the central part of the top of the spherical intake mesh cover 212. A plurality of uniformly distributed inclined stirring rods 2122 are fixedly installed on the outer side wall of the spherical intake mesh cover 212. By using the stirring frame 2121 and the plurality of inclined stirring rods 2122 in cooperation, the zinc oxide desulfurizer particles can be stirred to move, so that the propane and the zinc oxide desulfurization particles can be fully and comprehensively contacted, realizing a comprehensive and efficient desulfurization pretreatment of the propane. The bottom end of the hollow vertical shaft one 211 extends into the cooling cylinder 16. The sealing plate one 213 is fixedly installed at the bottom end of the hollow vertical shaft one 211. The sealing plate one 213 is used to seal the bottom end of the hollow vertical shaft one 211. The plurality of serpentine heat dissipation tubes 214 are all located in the cooling cylinder 16 and are uniformly distributed. The hollow vertical shaft two 215 is rotatably installed in the dehydration tank 17 and is located on the left side of the filter screen 22. The top end of the hollow vertical shaft two 215 extends into the cooling cylinder 16. The sealing plate two 216 is fixedly installed at the top end of the hollow vertical shaft two 215. The sealing plate two 216 is used to seal the top end of the hollow vertical shaft two 215. The top ends of the plurality of serpentine heat dissipation tubes 214 are fixedly communicated with the hollow vertical shaft one 211, and the bottom ends of the plurality of serpentine heat dissipation tubes 214 are fixedly communicated with the hollow vertical shaft two 215. The plurality of spherical outlet heads 217 are all fixedly installed on the hollow vertical shaft two 215 and are uniformly distributed, and the plurality of spherical outlet heads 217 are all located in the dehydration tank 17. The bottom end of the hollow vertical shaft two 215 extends outside the dehydration tank 17. The sealing plate three 218 is fixedly installed at the bottom end of the hollow vertical shaft two 215. The desulfurized propane can be dispersed through the hollow vertical shaft one 211 and enter the plurality of serpentine heat dissipation tubes 214. The heat in the desulfurized propane can be transferred to the cooling water in the cooling cylinder 16 through the serpentine heat dissipation tubes 214, realizing the function of cooling the desulfurized propane. That is, the water vapor carried in the desulfurized propane can be cooled and condensed into a liquid. The desulfurized propane and the liquid are discharged from the bottom ends of the serpentine heat dissipation tubes 214 and enter the hollow vertical shaft two 215. The sealing plate three 218 is used to seal the bottom end of the hollow vertical shaft two 215, so that the cooled propane and the carried liquid entering the hollow vertical shaft two 215 can be discharged from the plurality of spherical outlet heads 217.The propane discharged from multiple spherical gas outlets 217 can come into full and sufficient contact with the molecular sieve particles, and the molecular sieve particles can adsorb the water carried in the propane.

[0060] In this embodiment, the transmission assembly includes a transmission shaft 23, a driven pulley 24, a driving pulley 25 and a belt 26. The transmission shaft 23 is fixedly installed at the bottom of the third sealing plate 218. The driven pulley 24 is fixedly sleeved on the transmission shaft 23. The driving pulley 25 is fixedly sleeved at the bottom end of one of the driving shafts 114. The belt 26 is wound around the driven pulley 24 and the driving pulley 25. By utilizing the transmission function of the driven pulley 24, the driving pulley 25 and the belt 26, the rotation of the transmission shaft 23 can be controlled, that is, the transmission shaft 23 can drive the propane delivery assembly 21 to rotate.

[0061] In this embodiment, in order to facilitate the overhaul and maintenance of the interior of the desulfurization tank 15 and the replacement of the zinc oxide desulfurization agent particles inside the desulfurization tank 15, a first inspection opening is provided on the front side wall of the desulfurization tank 15 above the second transverse partition 18. A first inspection door 27 is fixedly installed on the front side wall of the desulfurization tank 15 by bolts. The first inspection door 27 is adapted to the first inspection opening. In order to facilitate the continuous entry of low-temperature cooling water into the cooling cylinder 16 and the continuous outflow of the high-temperature cooling water after heat absorption from the cooling cylinder 16, a cooling water inlet pipe 28 and a cooling water discharge pipe 29 are fixedly installed on the front side wall of the cooling cylinder 16. The cooling water inlet pipe 28 is located above the cooling water discharge pipe 29. Flow regulating valves are fixedly installed on both the cooling water inlet pipe 28 and the cooling water discharge pipe 29. The setting of the flow regulating valves facilitates the control of the flow rate of the cooling water entering and leaving the cooling cylinder 16, and thus can effectively and better cool the propane after desulfurization pretreatment. In order to facilitate the overhaul and maintenance of the interior of the dehydration tank 17 and the replacement of the molecular sieve particles inside the dehydration tank 17, a second inspection opening is provided on the front side wall of the dehydration tank 17 to the left of the filter screen 22. A second inspection door 30 is fixedly installed on the front side wall of the desulfurization tank 15 by bolts. The second inspection door 30 is adapted to the second inspection opening.

[0062] In this embodiment, with the above structure, when the vertical propane dehydrogenation reaction device provided by the present application is in use, at the beginning of the propane dehydrogenation treatment operation, first turn on the two electric heating tubes II 198 to run electrified, heat the zinc oxide desulfurizer particles in the desulfurization box 15, and use the stability sensor II to monitor the heating temperature value in real time. When the zinc oxide desulfurizer particles are heated to reach the required reaction condition range, control the propane to be dehydrogenated to enter the desulfurization box 15 through the propane input pipe 20. The sulfides in the propane contact the zinc oxide desulfurization particles and undergo a chemical reaction at an appropriate temperature and pressure, and are adsorbed and converted into products such as zinc sulfide, so as to realize the desulfurization pre-purification treatment of propane. The propane after desulfurization pretreatment passes through the mesh holes on the spherical intake mesh cover 212 and enters the hollow vertical shaft I 211 and flows downward. When the desulfurized propane flows downward in the hollow vertical shaft I 211, it will disperse and enter a plurality of serpentine heat dissipation tubes 214. The heat in the desulfurized propane can be transferred to the cooling water in the cooling cylinder 16 through the serpentine heat dissipation tubes 214, realizing the function of cooling the desulfurized propane, so that the water vapor carried in the desulfurized propane is cooled and condensed into a liquid. The desulfurized and cooled propane and the liquid are discharged from the bottom end of the serpentine heat dissipation tube 214 and enter the hollow vertical shaft II 215, so that the desulfurized and cooled propane and the carried liquid entering the hollow vertical shaft II 215 are discharged from a plurality of spherical air outlet heads 217. The propane and the liquid discharged from the plurality of spherical air outlet heads 217 can be in full and sufficient contact with the molecular sieve particles. The molecular sieve particles can be used to adsorb the water liquid carried in the propane, realizing the drying and dehydration treatment of propane. The propane after desulfurization and dehydration then enters the reaction cabinet 1 through the propane inlet pipe 6 and enters the space below the first transverse partition 4, and then, according to the operation steps in the first embodiment, the dehydrogenation reaction treatment of the propane after desulfurization and dehydration can be carried out comprehensively, sufficiently and efficiently;

[0063] During the dehydrogenation reaction treatment of propane after desulfurization and dehydration pretreatment through the above steps, when the motor 116 is starting and running, under the driving action of the driven pulley 24, the driving pulley 25 and the belt 26, the transmission shaft 23 can be controlled to rotate, which can drive the hollow vertical shaft one 211, the spherical air inlet mesh cover 212, the stirring frame 2121, the inclined stirring rod 2122, the blocking plate one 213, multiple serpentine heat dissipation tubes 214, the hollow vertical shaft two 215, the blocking plate two 216, multiple spherical air outlet heads 217 and the blocking plate three 218 to rotate. During this process, by using the coordinated use of the stirring frame 2121 and multiple inclined stirring rods 2122, the zinc oxide desulfurizer particles can be stirred to move, so that propane can be in full and comprehensive contact with the zinc oxide desulfurization particles, realizing the comprehensive and efficient desulfurization pretreatment of propane. By using the rotation of multiple serpentine heat dissipation tubes 214, the heat in the desulfurized propane can be transferred to the cooling water in the cooling cylinder 16 more quickly and comprehensively, realizing more efficient cooling of the desulfurized propane. By using the rotation of multiple spherical air outlet heads 217, the water carried in the desulfurized and cooled propane can be in more comprehensive and sufficient contact with the molecular sieve particles, and the molecular sieve particles can comprehensively and effectively adsorb the water carried in the propane, realizing the comprehensive and efficient dehydration pretreatment of propane. Furthermore, the activity and service life of the dehydrogenation reaction catalyst particles can be effectively extended, and the corrosion impact on the inside of the reaction cabinet 1 can be greatly reduced, improving the quality of the dehydrogenation reaction and extending the service life of the equipment;

[0064] Through the above steps, propane is first pretreated for desulfurization and dehydration, and then during the dehydrogenation reaction treatment of the propane after desulfurization and dehydration, when the high-temperature mixed gas of propylene and hydrogen passes through the propane discharge pipe 7 and enters the hollow air distribution plate 192, and then enters a plurality of arc-shaped heat conduction pipes 195 through two gas transmission joints 193 respectively. During the flow of the mixed gas of propylene and hydrogen in the plurality of arc-shaped heat conduction pipes 195, the heat in the mixed gas of propylene and hydrogen can be used to heat the zinc oxide desulfurizer particles in the desulfurization box 15 through the arc-shaped heat conduction pipes 195. Furthermore, the two second electric heating tubes 198 can be turned off, realizing the recovery and utilization of the waste heat of the mixed gas of propylene and hydrogen, reducing energy consumption, improving energy utilization rate, and having the effect of energy saving. After releasing heat, the mixed gas of propylene and hydrogen enters the annular hollow gas collecting plate 196 through two gas transmission joints 194, and then is transported to the subsequent purification equipment through the propane output pipe 197 for the separation and purification operations of propylene and hydrogen. Moreover, during the process of heating the zinc oxide particles by using the waste heat of the mixed gas of propylene and hydrogen, since the desulfurization reaction is an exothermic reaction, the temperature of the zinc oxide desulfurizer particles may increase during the reaction process. By adjusting the opening degree of the bypass valve, a part of the mixed gas of propylene and hydrogen directly flows through the bypass pipe 199 into the propane output pipe 197 and is transported away, thus adjusting the intake air volume of the mixed gas of propylene and hydrogen entering the hollow air distribution plate 192. This method can effectively control the temperature of heating the zinc oxide desulfurization particles, prevent the temperature from being too high from affecting the desulfurization effect and the stability of the zinc oxide desulfurizer particles, and achieve better desulfurization and pre-purification treatment of propane.

[0065] The above has introduced in detail a vertical propane dehydrogenation reaction device provided by the present application. Specific embodiments are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A vertical propane dehydrogenation reaction device, characterized in that: The invention comprises a reaction cabinet (1) with an open top and a sealed cabinet cover (3) fixed to the top of the reaction cabinet (1) by bolts, legs (2) being fixedly installed at the four corners of the bottom of the reaction cabinet (1), a transverse partition (4) being fixedly installed in the reaction cabinet (1), two propane dehydrogenation reaction cylinders (5) being fixedly installed on the transverse partition (4), the propane dehydrogenation reaction cylinders (5) being used to contain dehydrogenation reaction catalyst particles, the top ends of the two propane dehydrogenation reaction cylinders (5) being open and sealingly abutting against the bottom of the sealed cabinet cover (3), and the bottom ends of the two propane dehydrogenation reaction cylinders (5) passing through the transverse partition (4); The reaction cabinet (1) is provided with a material shifting mechanism (11), which is used to shift the dehydrogenation reaction catalyst particles to move in the propane dehydrogenation reaction cylinder (5), and the material shifting mechanism (11) comprises two hollow vertical sleeves (112) and two spiral feed shafts (113), the two hollow vertical sleeves (112) are respectively fixedly installed in the corresponding propane dehydrogenation reaction cylinder (5) through a bracket (111), the top of the hollow vertical sleeve (112) is lower than the air outlet (9), and the two spiral feed shafts (113) are respectively rotatably installed in the corresponding propane dehydrogenation reaction cylinder (5); A purification pretreatment mechanism is provided on one side of the reaction cabinet (1), and the purification pretreatment mechanism is used to remove sulfides and water vapor in propane. The purification pretreatment mechanism comprises a desulfurization box (15), a cooling cylinder (16) and a dehydration box (17). The desulfurization box (15) and the dehydration box (17) are both fixedly mounted on an outer wall of one side of the reaction cabinet (1), the desulfurization box (15) is located above the dehydration box (17), the cooling cylinder (16) is fixedly mounted between the desulfurization box (15) and the dehydration box (17), and the cooling cylinder (16) is used to contain cooling water.

2. The vertical propane dehydrogenation reaction device according to claim 1, characterized in that: A propane inlet pipe (6) and a propane outlet pipe (7) are fixedly mounted on one side of the reaction cabinet (1); one end of the propane inlet pipe (6) extends into the reaction cabinet (1) and is located below the transverse partition plate (4); one end of the propane outlet pipe (7) extends into the reaction cabinet (1) and is located above the transverse partition plate (4); a plurality of evenly distributed gas distribution pipes (8) are fixedly mounted on the bottom of the two propane dehydrogenation reaction cylinders (5); the top ends of the gas distribution pipes (8) are U-shaped and extend to Inside the propane dehydrogenation reaction cylinder (5), a plurality of evenly distributed air outlet holes (9) are provided on the inner wall of the propane dehydrogenation reaction cylinder (5), an annular material blocking net (10) is fixedly mounted on the outer wall of the propane dehydrogenation reaction cylinder (5), the bottom inner wall of the propane dehydrogenation reaction cylinder (5) is an arc-shaped surface structure with a concave middle, a plurality of evenly distributed electric heating tubes (12) are fixedly mounted on the inner walls of both sides of the reaction cabinet (1), and a temperature sensor (1) is fixedly mounted on the top of the transverse partition (4).

3. The vertical propane dehydrogenation reaction device according to claim 2, characterized in that: The material feeding mechanism (11) further comprises two driving shafts (114), two gears (115) and a motor (116); the top ends of the two spiral feeding shafts (113) respectively penetrate the corresponding hollow vertical sleeves (112); the spiral directions of the two spiral feeding shafts (113) are arranged in opposite directions; the bottom ends of the two spiral feeding shafts (113) respectively extend to the outside of the corresponding propane dehydrogenation reaction cylinder (5); the two driving shafts (114) are rotatably mounted on the bottom inner wall of the reaction cabinet (1); the top ends of the two driving shafts (114) respectively engage with the corresponding spiral shafts (115); The bottom end of the rotary feed shaft (113) is fixedly connected, the bottom ends of the two drive shafts (114) extend outside the reaction cabinet (1), the two gears (115) are respectively fixedly mounted on the corresponding drive shafts (114), and the two gears (115) are located below the reaction cabinet (1) and mesh with each other, the same support plate (117) is fixedly mounted on the four legs (2), the motor (116) is fixedly mounted on the top of the support plate (117), and the output shaft end of the motor (116) is fixedly connected to the bottom end of one of the drive shafts (114).

4. The vertical propane dehydrogenation reaction device according to claim 3, characterized in that: A material changing mechanism (13) is arranged on the top of the reaction cabinet (1). The material changing mechanism (13) is used to replace the dehydrogenation reaction catalyst particles in the propane dehydrogenation reaction cylinder (5). The material changing mechanism (13) comprises two L-shaped frames (131), two hydraulic cylinders (132), two feeding cylinders (133), two shaft seats (134), two spiral feeding shafts (135), two rectangular connecting rods (136), two discharge pipes (137), two discharge end covers (138), two feeding pipes (139) and two feeding end covers (1391). The two L-shaped frames (131) are fixedly mounted on the top of the sealing cabinet cover (3). The two hydraulic cylinders (132) are respectively fixedly mounted on the corresponding L-shaped frames (131); the two feeding barrels (133) are respectively fixedly mounted on the output shaft ends of the corresponding hydraulic cylinders (132); the bottom ends of the two feeding barrels (133) are both open structures; the two feeding barrels (133) are respectively located directly above the corresponding hollow vertical sleeves (112); the top of the sealed cabinet cover (3) is fixedly sleeved with two sealing guide sleeves (14); the bottom ends of the two feeding barrels (133) respectively penetrate the corresponding sealing guide sleeves (14) and are respectively located in the corresponding propane dehydrogenation reaction barrels (5); the feeding barrels (133) are respectively provided with a plurality of sealing guide sleeves (14); the bottom ends of the two feeding barrels (133) respectively penetrate the corresponding sealing guide sleeves (14) and are respectively located in the corresponding propane dehydrogenation reaction barrels (5); the two ... The outer wall of the material barrel (133) is in sliding sealing contact with the inner wall of the sealing guide sleeve (14); the two shaft seats (134) are respectively fixedly mounted on the top inner wall of the corresponding material feeding barrel (133); the two spiral material feeding shafts (135) are respectively rotatably mounted on the bottom of the corresponding shaft seats (134); the two rectangular connecting rods (136) are respectively fixedly mounted on the bottom ends of the corresponding spiral material feeding shafts (135); the top ends of the two spiral material feeding shafts (113) are both provided with rectangular grooves (1131); the bottom ends of the two rectangular connecting rods (136) respectively extend to the outside of the corresponding material feeding barrel (133) and are respectively Slidingly mounted in the corresponding rectangular groove (1131), the two discharge pipes (137) are respectively fixedly mounted on the side of the two feeding cylinders (133) close to each other, the two discharge end covers (138) are respectively threadedly mounted on one end of the corresponding discharge pipe (137), the two feeding pipes (139) are both fixedly mounted on the front side wall of the reaction cabinet (1), one end of the two feeding pipes (139) extends into the reaction cabinet (1) and is respectively fixedly connected to the corresponding propane dehydrogenation reaction cylinder (5), and the two feeding end covers (1391) are respectively threadedly mounted on the other end of the corresponding feeding pipe (139).

5. The vertical propane dehydrogenation reaction device according to claim 4, characterized in that: The inner diameters of the two feeding cylinders (133) are identical to the inner diameters of the two hollow vertical sleeves (112), and the spiral directions of the two spiral feeding shafts (135) are identical to the spiral directions of the corresponding spiral feeding shafts (113).

6. The vertical propane dehydrogenation reaction device according to claim 3, characterized in that: The purification pretreatment mechanism also includes a second transverse partition (18), a heating component (19), a propane input pipe (20), a propane delivery component (21), a filter (22) and a transmission component. The second transverse partition (18) is fixedly installed in the desulfurization box (15). The top of the second transverse partition (18) is used to place zinc oxide desulfurization agent particles. The heating component (19) is arranged on the desulfurization box (15). The heating component is used to heat the zinc oxide desulfurization agent particles in the desulfurization box (15). The propane input pipe (20) is fixedly installed on the top of the desulfurization box (15). One end of the propane input pipe (20) extends into the desulfurization box (15). The propane delivery component (21) is a filter screen (22) and a transmission component. The component (21) is arranged between the desulfurization box (15), the cooling cylinder (16) and the dehydration box (17); the propane conveying component (21) is used to convey the propane in the desulfurization box (15) to the cooling cylinder (16) and the dehydration box (17) in sequence; the filter (22) is fixedly installed in the dehydration box (17); the space in the dehydration box (17) on the left side of the filter (22) is used to contain molecular sieve particles; the end of the propane inlet pipe (6) away from the reaction cabinet (1) extends into the dehydration box (17) and is located on the right side of the filter (22); the transmission component is arranged below the dehydration box (17); the transmission component is used to control the rotation of the propane conveying component (21).

7. The vertical propane dehydrogenation reaction device according to claim 6, characterized in that: The heating assembly (19) comprises two T-shaped seats (191), a hollow gas distribution plate (192), two gas transmission joints (193), two gas transmission joints (194), a plurality of arc-shaped heat conducting pipes (195), an annular hollow gas collecting plate (196), a propane output pipe (197), two electric heating pipes (198) and a bypass pipe (199). The two T-shaped seats (191) are fixedly mounted on the top inner wall of the desulfurization box (15), the hollow gas distribution plate (192) is fixedly mounted on the bottom of the two T-shaped seats (191), and the end of the propane discharge pipe (7) away from the reaction cabinet (1) extends to The desulfurization box (15) is fixedly connected to the top of the hollow gas distribution plate (192), the propane discharge pipe (7) is connected to the inside of the hollow gas distribution plate (192), the two gas supply connectors (193) are fixedly installed at the bottom of the hollow gas distribution plate (192), the two gas supply connectors (193) are connected to the inside of the hollow gas distribution plate (192), the two gas supply connectors (194) are fixedly installed at the top of the transverse partition plate (18), the top ends of the plurality of arc-shaped heat conduction pipes (195) are fixedly connected to the bottoms of the two gas supply connectors (193) and are evenly distributed, and the plurality of The bottom ends of the arc-shaped heat-conducting pipes (195) are fixedly connected to the tops of the two gas supply connectors (194) and are evenly distributed. The annular hollow gas collecting plate (196) is fixedly installed at the bottom of the transverse partition (18). The bottom ends of the two gas supply connectors (194) penetrate the transverse partition (18) and are fixedly installed at the tops of the annular hollow gas collecting plate (196). The two gas supply connectors (194) are connected to the inside of the annular hollow gas collecting plate (196). One end of the propane output pipe (197) is fixedly connected to one side of the annular hollow gas collecting plate (196). The other end of the tube (197) extends outside the desulfurization box (15), the top ends of the two electric heating tubes (198) are respectively fixedly connected to the bottom center of the corresponding gas transmission connector (193), the bottom ends of the two electric heating tubes (198) are respectively fixedly connected to the top center of the corresponding gas transmission connector (193), the two ends of the bypass pipe (199) are respectively fixedly connected to the propane output pipe (197) and the propane discharge pipe (7), a one-way bypass valve is fixedly installed on the bypass pipe (199), and a temperature sensor 2 is fixedly installed on the top inner wall of the desulfurization box (15).

8. The vertical propane dehydrogenation reaction device according to claim 7, characterized in that: The propane delivery assembly (21) comprises a hollow vertical shaft (211), a spherical air inlet mesh cover (212), a blocking plate (213), a plurality of serpentine heat dissipation pipes (214), a hollow vertical shaft (215), a blocking plate (216), a plurality of spherical gas outlet heads (217) and a blocking plate (218), wherein the hollow vertical shaft (211) is rotatably mounted on the bottom inner wall of the desulfurization box (15), and the top end of the hollow vertical shaft (211) is rotatably mounted to penetrate the transverse partition (18) and is located between the two gas delivery ports. The spherical air inlet mesh cover (212) is fixedly mounted on the top of the hollow vertical shaft (211) between the first and second heads (194), a stirring frame (2121) is fixedly mounted on the top center of the spherical air inlet mesh cover (212), a plurality of evenly distributed oblique stirring rods (2122) are fixedly mounted on the outer wall of the spherical air inlet mesh cover (212), the bottom end of the hollow vertical shaft (211) extends into the cooling cylinder (16), and the blocking plate (213) is fixedly mounted on the hollow vertical shaft (211). The bottom end of the cooling tube (211), the plurality of serpentine heat dissipation pipes (214) are all located in the cooling tube (16) and are evenly distributed, the hollow vertical shaft (215) is rotatably mounted in the dehydration box (17) and is located on the left side of the filter screen (22), the top end of the hollow vertical shaft (215) extends into the cooling tube (16), the sealing plate (216) is fixedly mounted on the top end of the hollow vertical shaft (215), the top ends of the plurality of serpentine heat dissipation pipes (214) are all aligned with the hollow vertical shaft (211). 1) fixedly connected, the bottom ends of the plurality of serpentine heat dissipation pipes (214) are fixedly connected to the second hollow vertical shaft (215), the plurality of spherical air outlet heads (217) are fixedly mounted on the second hollow vertical shaft (215) and are evenly distributed, and the plurality of spherical air outlet heads (217) are located in the dehydration box (17), the bottom end of the second hollow vertical shaft (215) extends outside the dehydration box (17), and the third sealing plate (218) is fixedly mounted on the bottom end of the second hollow vertical shaft (215).

9. The vertical propane dehydrogenation reaction device according to claim 8, characterized in that: The transmission assembly comprises a transmission shaft (23), a driven pulley (24), a driving pulley (25) and a belt (26); the transmission shaft (23) is fixedly mounted on the bottom of the third blocking plate (218); the driven pulley (24) is fixedly mounted on the transmission shaft (23); the driving pulley (25) is fixedly mounted on the bottom end of one of the driving shafts (114); and the belt (26) is wound around the driven pulley (24) and the driving pulley (25).

10. The vertical propane dehydrogenation reaction device according to claim 9, characterized in that: The front side wall of the desulfurization box (15) is provided with an inspection port one located above the second transverse partition (18); the front side wall of the desulfurization box (15) is fixedly provided with an inspection door one (27) by bolts, and the inspection door one (27) is compatible with the inspection port one; the front side wall of the cooling cylinder (16) is fixedly provided with a cooling water inlet pipe (28) and a cooling water outlet pipe (29); the cooling water inlet pipe (28) is located above the cooling water outlet pipe (29); flow regulating valves are fixedly provided on the cooling water inlet pipe (28) and the cooling water outlet pipe (29); the front side wall of the dehydration box (17) is provided with an inspection port two located on the left side of the filter (22); the front side wall of the desulfurization box (15) is fixedly provided with an inspection door two (30) by bolts, and the inspection door two (30) is compatible with the inspection port two.

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