Large propane dehydrogenation device

Abstract

The large propane dehydrogenation device comprises a tank body, the outer wall of the tank body is connected with a feeding pipe, the feeding pipe is connected with a conveying pump, a T-shaped plate is connected into the tank body, the two sides of the T-shaped plate are each provided with a catalysis structure used for catalyzing propylene reaction, and an opening facilitating circulation is formed in the lower end of the T-shaped plate; a transverse plate is connected to the top in the tank body, and a first detection structure is arranged between the transverse plate and the T-shaped plate. According to the large propane dehydrogenation device, due to the unique flowing mode, the contact opportunity of propane and a catalyst under the high-temperature condition is increased, so that the dehydrogenation reaction is promoted, and when gas penetrates through the mesh frame, the vibration balls can be driven to shake and impact in the mesh partition plates, and vibration is generated. The vibration acts on the mesh partition plate and the mesh frame, so that the catalyst particles filled in the mesh frame move or rotate under the vibration, and the contact between the catalyst particles and the propane gas is further enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of propane dehydrogenation equipment, in particular to a large-scale propane dehydrogenation device. Background Art

[0002] Propane dehydrogenation is a chemical reaction process that converts propane into propylene. Propylene is an important chemical raw material that can be used to produce high value-added products such as polypropylene, acrylonitrile, propylene oxide, ethylene-propylene rubber, nylon 66 and ABS resin. Propane dehydrogenation technology has attracted much attention due to its good product uniformity, high economic benefits and low dependence on petroleum.

[0003] In the chemical reaction of propane dehydrogenation to produce propylene, the catalyst plays a central role, which determines the efficiency and selectivity of the reaction. This process is a typical endothermic reaction, which means that it needs to absorb heat to proceed. In order to achieve a high propane conversion rate, the reaction is usually carried out under high temperature conditions. But it is these high temperature conditions that have also given rise to a thorny problem - catalyst carbon deposition.

[0004] Carbon deposition, the accumulation of carbon deposits on the catalyst surface, is one of the main obstacles in the catalytic dehydrogenation process. These deposits not only reduce the effective surface area of ​​the catalyst, but may also change the pore structure and surface properties of the catalyst, which can have a negative impact on the smooth progress of the reaction. Over time, carbon deposition will gradually reduce the activity of the catalyst and ultimately affect the yield and quality of propylene.

[0005] In order to maintain the activity of the catalyst, it must be regenerated regularly. The regeneration process aims to remove carbon deposits on the surface of the catalyst and restore its catalytic performance. Common regeneration methods include steam purging, air oxidation or hydrogen reduction. However, traditional regeneration methods often require equipment shutdown, which not only affects the production efficiency of the plant, but may also lead to significant economic losses. In addition, the degree of carbonization of the catalyst often depends on the subjective judgment of the operator. The uncertainty of this judgment may lead to inaccurate regeneration timing, which in turn affects the performance and service life of the catalyst. In view of the above problems, it is urgent to carry out innovative design based on the original propane dehydrogenation. Summary of the invention

[0006] The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution for a large-scale propane dehydrogenation device that is significantly different from the existing technology to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-scale propane dehydrogenation device, comprising a tank body, the outer wall of the tank body is connected to a feed pipe, and the feed pipe is connected to a feed pump, a T-shaped plate is connected to the tank body, and a group of catalytic structures for catalyzing propylene reaction are installed on both sides of the T-shaped plate, and an opening for convenient circulation is opened at the lower end of the T-shaped plate, a transverse plate is connected to the top of the tank body, and a first detection structure is provided between the transverse plate and the T-shaped plate, a three-way feed pipe is connected to the outer wall of the tank body between the T-shaped plate and the transverse plate, and a three-way solenoid valve is installed in the three-way area on the three-way feed pipe , and a liquefaction box is connected to the end of the three-way feed pipe, a second detection structure is provided on the liquefaction box, a connecting pipe is connected to one side of the liquefaction box, and the connecting pipe is connected to a water tank, a heat exchanger is installed on the water tank, and the heat exchanger is connected to the other side of the liquefaction box through another connecting pipe, a coil is provided in the water tank for heat conduction to heat the water in the water tank to water vapor, and a steam three-way pipe is connected to the water tank, and a three-way solenoid valve is installed in the three-way area of ​​the steam three-way pipe, a transfer structure is installed on the tank body, an auxiliary feed pipe is connected to the liquefaction box, and the auxiliary feed pipe is connected to a distillation mechanism.

[0008] Preferably, the tank body comprises a first tank body and a second tank body, and a group of transfer structures are respectively connected between the first tank body and the second tank body.

[0009] Preferably, the catalytic structure includes a mesh frame, a mesh partition, an oscillation ball, and a first guide plate. A group of mesh frames are installed on each side of the T-shaped plate, and a number of guide plates are provided on the outer wall of each group of mesh frames, and a group of mesh partitions are provided in each mesh frame, and each compartment in the middle area of ​​the mesh partition is provided with a number of oscillation balls, and each compartment on both sides of the mesh partition is filled with a catalyst.

[0010] Preferably, the mesh partition is arranged in a "well"-shaped structure, and mesh holes for gas to pass through are evenly arranged on the mesh partition and the mesh frame, and the guide plate is distributed in an inclined and zigzag shape on the outer wall of the mesh frame.

[0011] Preferably, the first detection structure includes a first trigger block, a cavity, a gear shaft, a transmission chain, a collection roller shaft, a chain lock, a cover plate, and a through opening, the first trigger block is slidably connected to the cross plate, and a cavity is opened in the cross plate, one side of the cavity is rotatably connected to the gear shaft, and the gear side on the gear shaft is meshingly connected to the outer wall of the first trigger block, the gear shaft is connected to the transmission chain through a sprocket, and the transmission chain is connected to the collection roller shaft through a sprocket, the collection roller shaft is rotatably connected to the other side of the inner wall of the cavity, and the outer wall of the collection roller shaft is connected to the chain lock by winding around the line wheel, the chain lock is connected to the cover plate, and the cover plate is rotatably connected to the through opening, and the through opening is opened at the top of the T-plate close to the side where the feed pipe is connected.

[0012] Preferably, the lower end of the first trigger block is arranged at a side away from the through opening as an inclined structure, and a gear block is arranged at a contact area between the outer wall of the first trigger block and the gear shaft.

[0013] Preferably, the liquefaction box includes a transverse partition, a second guide plate, and heat dissipation fins. The liquefaction box is connected to the inside of the transverse partition, and a plurality of second guide plates are alternately and zigzagly distributed on the top of the transverse partition. A plurality of heat dissipation fins penetrating the upper and lower end surfaces of the transverse partition are evenly installed between the second guide plates. The outer wall of the liquefaction box is located below the transverse partition and is connected to connecting pipes on both sides, and the outer wall of the liquefaction box is located above the transverse partition and is respectively connected to a three-way feed pipe and an auxiliary feed pipe on both sides.

[0014] Preferably, the second detection structure includes a second trigger block, a pressure spring, a fixing frame, and a travel switch. A second trigger block is provided on the top of the liquefaction box, and the lower end of the second trigger block is located between the second guide plates. The outer wall of the second trigger block is connected to a pressure spring, and the upper end of the pressure spring is connected to the fixing frame, and the fixing frame is installed on the top of the liquefaction box. A travel switch is installed on the top of the fixing frame, and the travel switch and the solenoid valve are electrically connected to the PLC control board.

[0015] Preferably, the transfer structure includes a transfer pipe, a box body, a baffle, and a memory alloy spring. A transfer pipe is connected between the first tank body and the second tank body, and a box body is provided on the transfer pipe. A solenoid valve and a one-way valve are respectively installed on both sides of the transfer pipe. A baffle is rotatably connected in the box body, and a memory alloy spring is connected between the baffle and the inner wall of the box body.

[0016] Compared with the prior art, the beneficial effect of the present invention is that in the reaction process of the large-scale propane dehydrogenation device, the propane gas raw material, under the guidance of the first guide plate, continuously shuttles along a tortuous "Z"-shaped path on the mesh frame filled with the catalyst. This unique flow mode not only increases the contact opportunity between propane and the catalyst under high temperature conditions, thereby promoting the dehydrogenation reaction, but also drives the oscillating ball to shake and collide in the mesh partition while the gas passes through the mesh frame, generating vibration. This vibration acts on the mesh partition and the mesh frame, causing the catalyst particles filled in the mesh frame to move or rotate under the vibration, further enhancing the contact between the catalyst particles and the propane gas, thereby improving the overall reaction effect.

[0017] In addition, the ingenious separation of the T-plate allows the propane gas raw material to undergo two such catalytic reactions, further improving the efficiency of the dehydrogenation reaction. However, as the catalyst continues to participate in the reaction, its surface will gradually carbonize, affecting the catalytic effect. In order to solve this problem, a horizontal plate and a first detection structure are set in the device. After the propane gas completes the dehydrogenation reaction, it will flow through the channel between the horizontal plate and the top of the T-plate. Since the density of propane gas is greater than that of propylene gas, it contains more molecules in the same volume, which allows the propane gas to transfer greater momentum when colliding with the surface of an object. Molecules with larger mass have greater momentum at the same speed, so they will generate greater driving force. In this way, when the incompletely dehydrogenated propane gas flows through, it will lift up the first trigger block, and through a series of chain reactions, it will drive the cover plate to rotate and open, blocking the channel, forcing the gas to flow back to the first catalytic structure area for secondary reaction.

[0018] As the degree of carbonization of the catalyst increases, the catalytic effect gradually weakens. At this time, the liquefaction box and the second detection structure come into play. After the propane gas is cooled to the boiling point through the liquefaction box, it liquefies into a liquid state and flows between the second guide plates. As the catalytic effect deteriorates, the amount of propylene gas produced decreases, resulting in a decrease in the flow of propylene entering the liquefaction box, and the liquefied water flow is also reduced. When the flow is not enough to lift the second trigger block, the second trigger block moves downward under the action of gravity and breaks away from contact with the travel switch. The travel switch immediately sends a signal to the PLC control board, which then issues a command to the solenoid valve to start another tank body to work. At the same time, the propane gas that has not been fully reacted in the previous tank body is transported to the new tank body through the transfer structure to continue the reaction, effectively avoiding the waste of resources.

[0019] In addition, when the water in the water tank cools the liquefaction box, the heat absorbed causes water vapor to be generated inside. This water vapor is introduced into the upper tank through the steam three-way pipe to reduce and regenerate the catalyst, thereby restoring its catalytic activity and ensuring the continuous and efficient operation of the entire dehydrogenation unit. The design concept of this system not only improves the efficiency of propane dehydrogenation, but also realizes real-time monitoring and maintenance of the catalyst status through intelligent detection and control mechanisms, ensuring the continuity and economy of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the front cross-sectional structure of the present invention; Figure 2 It is a front view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the mesh frame of the present invention; Figure 4 For the present invention Figure 1 The enlarged structural diagram at A in the middle; Figure 5 For the present invention Figure 1 The enlarged structural diagram at B in the middle; Figure 6 It is a schematic diagram of the cross-sectional structure of the liquefaction box of the present invention from top view.

[0021] In the figure: 1, tank body; 101, first tank body; 102, second tank body; 2, feed pipe; 3, T-plate; 4, catalytic structure; 401, mesh frame; 402, mesh partition; 403, oscillating ball; 404, first guide plate; 5, horizontal plate; 6, first detection structure; 601, first trigger block; 602, cavity; 603, gear shaft; 604, transmission chain; 605, collection roller shaft; 606, chain lock; 607, cover plate; 608, port; 7, three-way feed pipe; 8, Liquefaction box; 801, diaphragm; 802, second guide plate; 803, heat dissipation fin; 9, second detection structure; 901, second trigger block; 902, pressure spring; 903, fixing bracket; 904, travel switch; 10, connecting pipe; 11, water tank; 12, heat exchanger; 13, steam three-way pipe; 14, transfer structure; 1401, transfer pipeline; 1402, box body; 1403, baffle; 1404, memory alloy spring; 15, auxiliary feed pipe; 16, distillation mechanism. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-6The present invention provides a technical solution: a large-scale propane dehydrogenation device, comprising a tank body 1, a first tank body 101, a second tank body 102, a feed pipe 2, a T-shaped plate 3, a catalytic structure 4, a mesh frame 401, a mesh partition 402, an oscillating ball 403, a first guide plate 404, a horizontal plate 5, a first detection structure 6, a first trigger block 601, a cavity 602, a gear shaft 603, a transmission chain 604, a collection roller shaft 605, a chain lock 606, a cover plate 607, a through port 608, a three-branch feed pipe 7, a liquefaction box 8, and a horizontal partition Plate 801, second guide plate 802, heat dissipation fins 803, second detection structure 9, second trigger block 901, pressure spring 902, fixing frame 903, travel switch 904, connecting pipe 10, water tank 11, heat exchanger 12, steam three-way pipe 13, transfer structure 14, transfer pipeline 1401, box body 1402, baffle 1403, memory alloy spring 1404, auxiliary feed pipe 15, distillation mechanism 16, the outer wall of tank body 1 is connected with feed pipe 2, and feed pipe 2 is connected with feed pump, and tank body 1 is connected with A T-shaped plate 3 is provided, and a group of catalytic structures 4 for catalyzing propylene reaction are installed on both sides of the T-shaped plate 3, and an opening for easy circulation is opened at the lower end of the T-shaped plate 3, a horizontal plate 5 is connected to the top of the tank body 1, and a first detection structure 6 is provided between the horizontal plate 5 and the T-shaped plate 3, and a three-way feed pipe 7 is connected to the outer wall of the tank body 1 between the T-shaped plate 3 and the horizontal plate 5, and a three-way solenoid valve is installed in the three-way area of ​​the three-way feed pipe 7, and a liquefaction box 8 is connected to the end of the three-way feed pipe 7, and a second detection structure 9 is provided on the liquefaction box 8, and one side of the liquefaction box 8 is connected to A connecting pipe 10 is provided, and the connecting pipe 10 is connected to a water tank 11, a heat exchanger 12 is installed on the water tank 11, and the heat exchanger 12 is connected to the other side of the liquefaction box 8 through another connecting pipe 10, a coil is provided in the water tank 11 for heat conduction to heat the water in the water tank 11 to water vapor, and a steam three-way pipe 13 is connected to the water tank 11, and a three-way solenoid valve is installed in the three-way area of ​​the steam three-way pipe 13, a transfer structure 14 is installed on the tank body 1, an auxiliary feed pipe 15 is connected to the liquefaction box 8, and the auxiliary feed pipe 15 is connected to a distillation mechanism 16.

[0024] The tank body 1 includes a first tank body 101 and a second tank body 102 , and a group of transfer structures 14 are connected between the first tank body 101 and the second tank body 102 .

[0025] The catalytic structure 4 includes a mesh frame 401, a mesh partition 402, an oscillation ball 403, and a first guide plate 404. A group of mesh frames 401 are installed on each side of the T-shaped plate 3, and a plurality of guide plates 404 are arranged on the outer wall of each group of mesh frames 401. A group of mesh partitions 402 are arranged in each mesh frame 401, and a plurality of oscillation balls 403 are arranged in each compartment in the middle area of ​​the mesh partition 402, and catalysts are filled between each compartment on both sides of the mesh partition 402.

[0026] The mesh partition 402 is arranged in a "well"-shaped structure, and mesh holes for gas to pass through are evenly arranged on the mesh partition 402 and the mesh frame 401, and the guide plate 404 is distributed in an inclined and zigzag shape on the outer wall of the mesh frame 401.

[0027] The first detection structure 6 includes a first trigger block 601, a cavity 602, a gear shaft 603, a transmission chain 604, a collection roller shaft 605, a chain lock 606, a cover plate 607, and a through port 608. The first trigger block 601 is slidably connected to the horizontal plate 5, and a cavity 602 is provided in the horizontal plate 5. One side of the cavity 602 is rotatably connected to the gear shaft 603, and the gear side of the gear shaft 603 is meshed and connected to the outer wall of the first trigger block 601. The shaft 603 is connected to the transmission chain 604 through a sprocket, and the transmission chain 604 is connected to the collection roller 605 through a sprocket. The collection roller 605 is rotatably connected to the other side of the inner wall of the cavity 602, and the outer wall of the collection roller 605 is connected to the chain lock 606 through the winding of the working line wheel, the chain lock 606 is connected to the cover plate 607, and the cover plate 607 is rotatably connected to the through port 608. The through port 608 is opened at the top of the T-shaped plate 3 close to the connection side of the feed pipe 2.

[0028] The lower end of the first trigger block 601 is arranged at a side away from the through opening 608 as an inclined structure, and a gear block is arranged at the contact area between the outer wall of the first trigger block 601 and the gear shaft 603 .

[0029] The liquefaction box 8 includes a transverse partition 801, a second guide plate 802, and heat dissipation fins 803. The transverse partition 801 is connected inside the liquefaction box 8, and a plurality of second guide plates 802 are alternately and zigzagly distributed on the top of the transverse partition 801. A plurality of heat dissipation fins 803 are installed on the transverse partition 801 between the second guide plates 802 at equal intervals and pass through the upper and lower end surfaces thereof. The outer wall of the liquefaction box 8 is located below the transverse partition 801 and is connected to connecting pipes 10 on both sides. The outer wall of the liquefaction box 8 is located above the transverse partition 801 and is respectively connected to a three-way feed pipe 7 and an auxiliary feed pipe 15 on both sides.

[0030] The second detection structure 9 includes a second trigger block 901, a pressure spring 902, a fixing frame 903, and a travel switch 904. The second trigger block 901 is provided on the top of the liquefaction box 8, and the lower end of the second trigger block 901 is located between the second guide plates 802. The outer wall of the second trigger block 901 is connected to the pressure spring 902, and the upper end of the pressure spring 902 is connected to the fixing frame 903, and the fixing frame 903 is installed on the top of the liquefaction box 8. The travel switch 904 is installed on the top of the fixing frame 903, and the travel switch 904 and the solenoid valve are electrically connected to the PLC control board.

[0031] The transfer structure 14 includes a transfer pipe 1401, a box body 1402, a baffle 1403, and a memory alloy spring 1404. The transfer pipe 1401 is connected between the first tank body 101 and the second tank body 102, and the box body 1402 is provided on the transfer pipe 1401, and a solenoid valve and a one-way valve are respectively installed on both sides of the box body 1402 on the transfer pipe 1401, a baffle 1403 is rotatably connected in the box body 1402, and a memory alloy spring 1404 is connected between the baffle 1403 and the inner wall of the box body 1402.

[0032] Working principle: First, the propane gas is transported into the tank body 1 through the feed pipe 2. Through the arrangement of the T-shaped plate and the catalytic structure, the propane gas raw material, under the action of the first guide plate 404, continuously shuttles through the mesh frame 401 filled with the catalyst in a zigzag "Z" shape, thereby enhancing the dehydrogenation reaction of the propane gas and the catalyst at high temperature. In addition, in the process of the propane gas passing through the mesh frame 401, it will drive the oscillating ball 403 to shake and collide in the mesh partition 402, generating vibrations acting on the mesh partition 402 and the mesh frame 401, so that the catalyst particles filled in the mesh frame 401 move or rotate under the vibration, thereby enhancing the contact between the catalyst particles and the propane gas, thereby enhancing the reaction effect. In addition, under the separation of the T-shaped plate, the propane gas raw material will undergo two such catalytic reactions, making the dehydrogenation reaction more efficient. However, as the catalyst continues to participate in the reaction, the surface of the catalyst will undergo a carbonization reaction. Therefore, through the arrangement of the structures such as the horizontal plate 5 and the first detection structure 6, after the propane gas dehydrogenation reaction, when passing between the horizontal plate 5 and the top of the T-shaped plate 3, since the density of the propane gas is greater than that of the propylene gas, the gas with a larger density contains more molecules in the same volume, so it can transfer a larger momentum when colliding with the surface of the object, and the mass of the gas molecules will also affect the effect of the collision. Molecules with a larger mass have a larger momentum at the same speed and will produce a larger driving force, so when the propylene gas passes through the first trigger block, it will not push up the first trigger block 601 to move upward, and pass normally into the three-way feed pipe, and when the catalytic effect deteriorates, the propane gas that is not completely dehydrogenated will push up the first trigger block 601 to move upward when passing through, and through a chain reaction such as a chain, the chain lock 606 is driven to pull the cover plate 607 to rotate and open, and the channel between the horizontal plate 5 and the top of the T-shaped plate 3 is blocked, so that this propane gas flows back from the port 608 to the first catalytic structure area again, and participates in the catalytic reaction again.

[0033] However, as the catalyst is continuously carbonized, the catalytic effect becomes poor. Through the arrangement of the liquefaction box 8 and the second detection structure 9, after being cooled down to the boiling point by the liquefaction box 8, the catalyst is liquefied into a liquid and flows between the second guide plates 802. Since the catalytic effect of the catalyst in the tank body 1 becomes poor, it reflects that the propylene gas becomes less, so the propylene flow entering the liquefaction box 8 becomes smaller, and the liquefied water flow also becomes smaller. When passing through the second trigger block 901, the second trigger block 901 cannot be lifted up. The second trigger block 901 moves downward under the action of gravity and is out of contact with the travel switch 904. The travel switch 904 sends a signal to the PLC. The control board, the PLC control sends a command to the solenoid valve, so that the other tank body 1 works, and the propane gas that has not been completely reacted in the previous tank body is transported to the tank body for reaction through the transfer structure 14. The PLC board controls the solenoid valve on the transfer pipeline 1401 to open, and the propane gas in the previous tank body enters the transfer pipeline 1401, passes through the box body 1402 to act on the baffle 1403 and the memory alloy spring 1404. The memory alloy spring 1404 is heated and pushes the baffle 1403 to open, so that the propane gas passes through the one-way valve and enters the other tank body. This is the working principle of the large-scale propane dehydrogenation device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-scale propane dehydrogenation device, comprising a tank body (1), characterized in that: The outer wall of the tank body (1) is connected to a feed pipe (2), and the feed pipe (2) is connected to a feed pump. A T-shaped plate (3) is connected inside the tank body (1), and a group of catalytic structures (4) for catalyzing propylene reaction are installed on both sides of the T-shaped plate (3), and an opening for easy circulation is opened at the lower end of the T-shaped plate (3). A transverse plate (5) is connected to the top of the tank body (1), and a first detection structure (6) is provided between the transverse plate (5) and the T-shaped plate (3). A three-way feed pipe (7) is connected to the outer wall of the tank body (1) between the T-shaped plate (3) and the transverse plate (5), and a three-way solenoid valve is installed in the three-way region of the three-way feed pipe (7), and a liquefaction box (8) is connected to the end of the three-way feed pipe (7), and the liquefaction box (8) is provided with a first detection structure (6). A second detection structure (9), wherein one side of the liquefaction box (8) is connected to a connecting pipe (10), and the connecting pipe (10) is connected to a water tank (11), a heat exchanger (12) is installed on the water tank (11), and the heat exchanger (12) is connected to the other side of the liquefaction box (8) through another connecting pipe (10), a coil is provided in the water tank (11) for facilitating heat conduction to heat the water in the water tank (11) to water vapor, and the water tank (11) is connected to a steam three-way pipe (13), and a three-way solenoid valve is installed in the three-way region of the steam three-way pipe (13), a transfer structure (14) is installed on the tank body (1), and an auxiliary material delivery pipe (15) is connected to the liquefaction box (8), and the auxiliary material delivery pipe (15) is connected to a distillation mechanism (16).

2. A large-scale propane dehydrogenation device according to claim 1, characterized in that: The tank body (1) comprises a first tank body (101) and a second tank body (102), wherein a set of transfer structures (14) are respectively connected between the first tank body (101) and the second tank body (102).

3. A large-scale propane dehydrogenation device according to claim 1, characterized in that: The catalytic structure (4) comprises a mesh frame (401), a mesh partition (402), an oscillating ball (403), and a first guide plate (404). A group of mesh frames (401) are installed on both sides of the T-shaped plate (3), and the outer wall of each group of mesh frames (401) is provided with a plurality of guide plates (404). A group of mesh partitions (402) are provided inside each mesh frame (401), and each compartment in the middle area of ​​the mesh partition (402) is provided with a plurality of oscillating balls (403), and each compartment in the area on both sides of the mesh partition (402) is filled with a catalyst.

4. A large-scale propane dehydrogenation device according to claim 3, characterized in that: The mesh partition (402) is arranged in a "well"-shaped structure, and mesh holes that facilitate gas to pass through are evenly arranged on the mesh partition (402) and the mesh frame (401), and the guide plates (404) are distributed in an inclined and zigzag shape on the outer wall of the mesh frame (401).

5. A large-scale propane dehydrogenation device according to claim 1, characterized in that: The first detection structure (6) comprises a first trigger block (601), a cavity (602), a gear shaft (603), a transmission chain (604), a collection roller shaft (605), a chain lock (606), a cover plate (607), and a through hole (608); the first trigger block (601) is slidably connected to the transverse plate (5), and a cavity (602) is provided in the transverse plate (5); a gear shaft (603) is rotatably connected to one side of the cavity (602), and a gear side on the gear shaft (603) is meshingly connected to an outer wall of the first trigger block (601); The gear shaft (603) is connected to a transmission chain (604) via a sprocket, and the transmission chain (604) is connected to a collection roller (605) via a sprocket. The collection roller (605) is rotatably connected to the other side of the inner wall of the cavity (602), and the outer wall of the collection roller (605) is connected to a chain lock (606) by winding with a work line wheel. The chain lock (606) is connected to a cover plate (607), and the cover plate (607) is rotatably connected to a through opening (608). The through opening (608) is opened at the top of the T-shaped plate (3) near the side connected to the feed pipe (2).

6. A large-scale propane dehydrogenation device according to claim 5, characterized in that: The side of the lower end of the first trigger block (601) away from the through opening (608) is arranged as an inclined structure, and a gear block is arranged in the contact area between the outer wall of the first trigger block (601) and the gear shaft (603).

7. A large-scale propane dehydrogenation device according to claim 1, characterized in that: The liquefaction box (8) comprises a transverse partition (801), a second guide plate (802), and heat dissipation fins (803); the transverse partition (801) is connected inside the liquefaction box (8), and a plurality of second guide plates (802) are alternately and zigzag-distributed on the top of the transverse partition (801); a plurality of heat dissipation fins (803) are installed on the transverse partition (801) between the second guide plates (802) at equal intervals and penetrate the upper and lower end surfaces thereof; the outer wall of the liquefaction box (8) is located below the transverse partition (801) and is connected to connecting pipes (10) on both sides; and the outer wall of the liquefaction box (8) is located above the transverse partition (801) and is respectively connected to a three-branch feed pipe (7) and an auxiliary feed pipe (15) on both sides.

8. A large-scale propane dehydrogenation device according to claim 1, characterized in that: The second detection structure (9) comprises a second trigger block (901), a pressure spring (902), a fixing frame (903), and a travel switch (904); the second trigger block (901) is arranged on the top of the liquefaction box (8), and the lower end of the second trigger block (901) is located between the second guide plates (802); the outer wall of the second trigger block (901) is connected to a pressure spring (902), and the upper end of the pressure spring (902) is connected to the fixing frame (903); the fixing frame (903) is installed on the top of the liquefaction box (8); the travel switch (904) is installed on the top of the fixing frame (903), and the travel switch (904) and the solenoid valve are both electrically connected to the PLC control board.

9. A large-scale propane dehydrogenation device according to claim 1, characterized in that: The transfer structure (14) comprises a transfer pipeline (1401), a box (1402), a baffle (1403), and a memory alloy spring (1404); the transfer pipeline (1401) is connected between the first tank (101) and the second tank (102); the box (1402) is provided on the transfer pipeline (1401); a solenoid valve and a one-way valve are respectively installed on both sides of the box (1402) on the transfer pipeline (1401); the baffle (1403) is rotatably connected inside the box (1402); and the memory alloy spring (1404) is connected between the baffle (1403) and the inner wall of the box (1402).

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