Propylene oxidation reactor convenient for decoking

Abstract

The utility model relates to the technical field of chemical equipment, and discloses a propylene oxidation reactor convenient for decoking, which comprises a framework, the outer side of the framework is fixedly connected with a shell, the front end of the shell is fixedly connected with a cover door, and the rear end in the shell is fixedly connected with a slide rail I and a slide rail II. According to the propylene oxidation reactor convenient for decoking, during gas purging decoking operation, nitrogen or air is injected from the feeding pipe, a catalytic layer in the catalytic pipe is purged, coke is blown down from the catalytic layer, the coke is physically removed, and during high-temperature oxidation decoking, the heating pipe is started to heat the interior of the shell to 500-700 DEG C, the internal temperature is observed through the thermometer, and the temperature of the interior of the shell is detected. Sufficient air is injected from the feeding pipe, coke attached to the catalyst layer is converted into carbon dioxide and water vapor to be discharged, after a long-time reaction and when a catalyst seriously loses efficacy, the catalytic assembly can be controlled to stretch out of the shell to replace the catalyst, multiple decoking modes are achieved, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a propylene oxidation reactor which is convenient for decoking. Background Art

[0002] In laboratory environments, propylene oxidation reactors are mainly used for the catalytic oxidation of propylene to produce propylene oxide. However, during long-term operation, coke will gradually accumulate on the catalyst surface. This phenomenon will significantly reduce the activity of the catalyst and the reaction efficiency. For laboratories, propylene, as an indispensable substance, plays a vital role in various experimental studies.

[0003] China Utility Model Patent Publication No.: CN 214334816 U, discloses: a propylene oxidation reactor with a decoking function, the propylene oxidation reactor with a decoking function, by decoking the propylene oxidation reactor, the blockage coefficient and propylene unit consumption of the reactor are significantly reduced, the device production capacity is improved, and the effect is good. It can be seen that the decoking operation has high effectiveness and feasibility in extending the service life of the catalyst, ensuring the normal operation of the reactor, and reducing the propylene unit consumption. However, the catalyst inside the tube of the propylene oxidation reactor with a decoking function is easy to fail after long-term reaction use, and the tube is not easy to replace, which affects maintenance. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a propylene oxidation reactor which is convenient for decoking, and can effectively solve the problems in the prior art.

[0005] The technical scheme adopted by the utility model is: a propylene oxidation reactor convenient for decoking, comprising a skeleton, a shell is fixedly connected to the outside of the skeleton, a cover door is fixedly connected to the front end of the shell, a slide rail 1 and a slide rail 2 are fixedly connected to the rear end of the shell, a slide groove 1 is fixedly connected to the rear end of the shell, a bidirectional threaded screw is rotatably connected to the center of the slide groove 1, a motor 1 is fixedly connected to the left side of the shell, a bending pipe 1 and a bending pipe 2 are arranged inside the skeleton, a discharge pipe is fixedly connected to the left side of the bending pipe 1, a three-way solenoid valve 1 is arranged on the outside of the discharge pipe, and a coke removal device is fixedly connected to the front interface of the three-way solenoid valve 1. outlet pipe, a feed pipe is fixedly connected to the right side of the second curved pipe, a three-way solenoid valve is arranged on the outside of the feed pipe, a coke discharge inlet pipe is fixedly connected to the front interface of the second three-way solenoid valve, a catalytic component is fixedly connected between the outlet pipe and the feed pipe, a slide rail is fixedly connected to the bottom end of the skeleton, a slide groove is fixedly connected to the bottom end of the skeleton, a screw is rotatably connected to the center of the slide groove, a motor is fixedly connected to the rear end of the shell, a thermometer is fixedly connected to the front end of the shell, a heating pipe is fixedly connected to the rear end of the skeleton, a slider is fixedly connected to the rear end of the outlet pipe, and a slider is fixedly connected to the rear end of the feed pipe;

[0006] The second bending tube comprises a sealing plate, a slot, a bending tube body and a joint tube, the left side of the sealing plate is provided with a slot, the right side of the sealing plate is fixedly connected to the bending tube body, and the left side of the sealing plate is fixedly connected to the joint tube;

[0007] The catalytic assembly includes a square frame, a fixed plate, an insert ring, a catalytic tube, a limiting ring, a catalytic frame, a catalytic layer, and a slider three. Fixed plates are fixedly connected on both sides of the square frame, an insert ring is fixedly connected to the outer side of the fixed plate, a catalytic tube is fixedly connected to the center of the fixed plate, a limiting ring is fixedly connected to the inner wall of the catalytic tube, a catalytic frame is arranged inside the catalytic tube, a catalytic layer is fixedly connected to the outer wall of the catalytic frame, and a slider three is fixedly connected to the lower end of the square frame.

[0008] Preferably, the slide rail 1 is slidably connected to the slider 1, the slide rail 2 is slidably connected to the slider 2, the slider 1 and the slider 2 are both slidably connected to the slide groove 1, and the slider 1 and the slider 2 are both threadedly connected to the bidirectional threaded screw.

[0009] Through the above technical scheme, slide rail 1, slide rail 2, slide groove 1 and bidirectional threaded screw are arranged. When 1,3-propylene glycol is prepared using a propylene oxidation reactor, when the catalyst fails seriously after a long reaction, the catalyst needs to be replaced. The motor 1 is started to drive the bidirectional threaded screw to rotate, and the slider 2 connected by the thread is driven to move rightward along the slide groove 1 and the slide rail 2, and the slider 1 is driven to move leftward along the slide groove 1 and the slide rail 1, thereby driving the bending tube 1 and the bending tube 2 to move in the opposite direction until the joint tube is separated from the fixed plate, and the cover door is opened. The motor 2 is started to drive the screw to rotate, and the slider 3 connected by the thread is driven to move forward along the slide groove 2 and the slide rail 3, and the catalytic component is driven to extend out of the shell, so that the catalyst can be replaced.

[0010] Preferably, the slot is matched with the insert ring, and the outer diameter of the joint pipe is the same as the inner diameter of the catalytic tube.

[0011] Through the above technical scheme, slots, insert rings and joint pipes are set. After the catalyst is replaced, start motor 2 to drive the catalytic assembly to move backward to correspond to bent tube 1 and bent tube 2, start motor 1 to drive bent tube 1 and bent tube 2 to move toward each other. During this process, the joint pipe is inserted into the catalytic tube, and the insert ring is inserted into the slot until the sealing plate is in tight contact with the fixed plate, thereby completing the docking of bent tube 1, bent tube 2 and the catalytic assembly to form a tubular reactor.

[0012] Preferably, the structures of the bending tube 1 and the bending tube 2 are the same, the bending tube 1 and the bending tube 2 are centrally symmetrically distributed, and the three-way solenoid valve 1 and the three-way solenoid valve 2 are both "T"-shaped three-way valves.

[0013] Through the above technical scheme, three-way solenoid valve 1 and three-way solenoid valve 2 are set, and gas purging and high-temperature oxidation decoking can be carried out during decoking. The three-way solenoid valve 1 is switched to connect the coke discharge outlet pipe with the discharge pipe, and the three-way solenoid valve 2 is switched to connect the coke discharge inlet pipe with the feed pipe. During the gas purging decoking operation, nitrogen or air is injected from the feed pipe to purge the catalytic layer in the catalytic tube, blow the coke off the catalytic layer, and physically remove the coke. During high-temperature oxidation decoking, the heating tube is started to heat the inside of the outer shell to 500-700°C, and sufficient air is injected from the feed pipe to convert the coke attached to the catalytic layer into carbon dioxide and water vapor for discharge, thereby removing the coke.

[0014] Preferably, the ring width of the limiting ring is equal to the ring width of the catalyst rack, the catalyst rack is slidably connected to the catalyst tube, and the limiting ring is arranged on the left inside the catalyst tube.

[0015] Through the above technical scheme, a limiting ring is set. When the catalyst is replaced, the catalyst rack is pulled out from the right end of the catalytic tube. After the catalytic layer is replaced, the catalyst rack is slid and inserted into the catalytic tube again until the catalyst rack is in tight contact with the limiting ring. When the bent tube 2 is assembled with the catalytic assembly, the joint tube presses the catalyst rack against the right end of the limiting ring, and the fixing effect is good.

[0016] Preferably, the slider three is slidably connected to the slide rail three and the slide groove two, and the screw rod is threadedly connected to the slider three.

[0017] Through the above technical solution, slide groove 2 and screw are set, and motor 2 is started to drive the screw to rotate, thereby driving slider 3 to move along slide groove 2 until slider 3 reaches the maximum stroke. At this time, the catalytic tube extends out of the shell, which is convenient for catalyst replacement operation.

[0018] Preferably, the heating tube corresponds to the catalytic assembly, and the width of the catalytic assembly is smaller than the width of the cover door.

[0019] Through the above technical solution, the width of the catalytic component is smaller than the width of the cover door, which is convenient for replacement.

[0020] Compared with the prior art, the utility model provides a propylene oxidation reactor which is convenient for decoking and has the following beneficial effects:

[0021] 1. The propylene oxidation reactor convenient for decoking is provided with a slide rail 1, a slide rail 2, a slide groove 1 and a bidirectional threaded screw. When the propylene oxidation reactor is used to prepare 1,3-propylene glycol, after a long reaction, when the catalyst is seriously ineffective, the catalyst needs to be replaced. The motor 1 is started to drive the bidirectional threaded screw to rotate, drive the threaded slider 2 to move rightward along the slide groove 1 and the slide rail 2, drive the slider 1 to move leftward along the slide groove 1 and the slide rail 1, thereby driving the bending pipe 1 and the bending pipe 2 to move in the opposite direction until the joint pipe is separated from the fixed plate, open the cover door, start the motor 2 to drive the screw to rotate, drive the threaded slider 3 to move forward along the slide groove 2 and the slide rail 3, and drive The catalytic component extends out of the shell, and the catalyst can be replaced. When the catalyst is replaced, the catalytic rack is pulled out from the right end of the catalytic tube. After the catalytic layer is replaced, the catalytic rack is slid and inserted into the catalytic tube again until the catalytic rack contacts the limiting ring. After the catalyst is replaced, the second motor is started to drive the catalytic component to move backward to correspond to the first bending tube and the second bending tube. The first motor is started to drive the first bending tube and the second bending tube to move toward each other. During this process, the joint pipe is inserted into the catalytic tube, and the insert ring is inserted into the slot until the sealing plate is tightly in contact with the fixing plate, completing the docking of the first bending tube, the second bending tube and the catalytic component to form a tubular reactor. The joint pipe presses the catalytic rack tightly against the right end of the limiting ring, and the fixing effect is good.

[0022] 2. The propylene oxidation reactor convenient for decoking is provided with a three-way solenoid valve 1 and a three-way solenoid valve 2. Gas purging and high-temperature oxidation decoking can be performed during decoking. The three-way solenoid valve 1 is switched to connect the coke discharge outlet pipe with the discharge pipe, and the three-way solenoid valve 2 is switched to connect the coke discharge inlet pipe with the feed pipe. During the gas purging decoking operation, nitrogen or air is injected from the feed pipe to purge the catalytic layer in the catalytic tube, blow the coke off the catalytic layer, and physically remove the coke. During high-temperature oxidation decoking, the heating tube is started to heat the inside of the shell to 500-700°C, the internal temperature is observed by a thermometer, and sufficient air is injected from the feed pipe to convert the coke attached to the catalytic layer into carbon dioxide and water vapor for discharge, and the coke is removed. There are multiple decoking methods, the decoking process is convenient, the decoking effect is good, and it is beneficial to improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0024] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0025] Figure 3 This is a schematic diagram of the replacement structure of the catalytic component of the utility model;

[0026] Figure 4 This is a schematic diagram of the disassembled structure of the frame and shell of the utility model;

[0027] Figure 5 This is an enlarged structural diagram of the bending tube 1 and the catalytic component of the utility model;

[0028] Figure 6 This is a schematic diagram of the disassembled structure of the bending tube 1 and the catalytic component of the utility model;

[0029] Figure 7 This is a schematic diagram of the disassembled structure of the catalytic component of the utility model.

[0030] Among them: 1. frame; 2. shell; 3. cover door; 4. slide rail 1; 5. slide rail 2; 6. slide groove 1; 7. two-way threaded screw; 8. motor 1; 9. bending pipe 1; 10. discharge pipe; 11. three-way solenoid valve 1; 12. coke discharge pipe; 13. bending pipe 2; 1301. sealing plate; 1302. slot; 1303. bending pipe body; 1304. joint pipe; 14. feed pipe; 15. three-way solenoid valve 2; 16. Coke discharge inlet pipe; 17. Catalytic assembly; 1701. Square frame; 1702. Fixed plate; 1703. Insert ring; 1704. Catalytic tube; 1705. Limiting ring; 1706. Catalytic frame; 1707. Catalytic layer; 1708. Slider three; 18. Slide rail three; 19. Slide groove two; 20. Screw; 21. Motor two; 22. Thermometer; 23. Heating tube; 24. Slider one; 25. Slider two. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Embodiment 1: Figure 1-7 As shown, the utility model provides a propylene oxidation reactor for convenient decoking, comprising a skeleton 1, a shell 2 is fixedly connected to the outside of the skeleton 1, a cover door 3 is fixedly connected to the front end of the shell 2, a slide rail 4 and a slide rail 5 are fixedly connected to the rear end of the shell 2, a slide groove 6 is fixedly connected to the rear end of the shell 2, a bidirectional threaded screw 7 is rotatably connected to the center of the slide groove 6, a motor 8 is fixedly connected to the left side of the shell 2, a bending pipe 9 and a bending pipe 13 are arranged inside the skeleton 1, a discharge pipe 10 is fixedly connected to the left side of the bending pipe 9, a three-way solenoid valve 11 is arranged on the outside of the discharge pipe 10, a coke discharge pipe 12 is fixedly connected to the front interface of the three-way solenoid valve 11, and a bending pipe 12 is fixedly connected to the front interface of the bending pipe 12. A feed pipe 14 is fixedly connected to the right side of the frame 1, a three-way solenoid valve 2 15 is arranged outside the feed pipe 14, a coke discharge feed pipe 16 is fixedly connected to the front interface of the three-way solenoid valve 2 15, a catalytic component 17 is fixedly connected between the discharge pipe 10 and the feed pipe 14, a slide rail 3 18 is fixedly connected to the bottom end of the frame 1, a slide groove 2 19 is fixedly connected to the bottom end of the frame 1, a screw 20 is rotatably connected to the center of the slide groove 2 19, a motor 21 is fixedly connected to the rear end of the shell 2, a thermometer 22 is fixedly connected to the front end of the shell 2, a heating pipe 23 is fixedly connected to the rear end of the frame 1, a slider 1 24 is fixedly connected to the rear end of the discharge pipe 10, and a slider 2 25 is fixedly connected to the rear end of the feed pipe 14;

[0033] The bending tube 13 includes a sealing plate 1301, a slot 1302, a bending tube body 1303 and a joint tube 1304. The slot 1302 is provided on the left side of the sealing plate 1301, the bending tube body 1303 is fixedly connected to the right side of the sealing plate 1301, and the joint tube 1304 is fixedly connected to the left side of the sealing plate 1301.

[0034] The catalytic assembly 17 includes a square frame 1701, a fixed plate 1702, an insert ring 1703, a catalytic tube 1704, a limiting ring 1705, a catalytic rack 1706, a catalytic layer 1707, and a slider three 1708. The fixed plates 1702 are fixedly connected on both sides of the square frame 1701, the insert ring 1703 is fixedly connected on the outer side of the fixed plate 1702, the catalytic tube 1704 is fixedly connected to the center of the fixed plate 1702, the limiting ring 1705 is fixedly connected to the inner wall of the catalytic tube 1704, a catalytic rack 1706 is arranged inside the catalytic tube 1704, the catalytic layer 1707 is fixedly connected to the outer wall of the catalytic rack 1706, and the slider three 1708 is fixedly connected to the lower end of the square frame 1701.

[0035] Specifically, the slide rail 1 4 is slidably connected to the slider 1 24 , the slide rail 2 5 is slidably connected to the slider 2 25 , the slider 1 24 and the slider 2 25 are both slidably connected to the slide groove 1 6 , and the slider 1 24 and the slider 2 25 are both threadedly connected to the bidirectional threaded screw 7 . The advantage is that, by setting a slide rail 1 4, a slide rail 2 5, a slide groove 1 6 and a bidirectional threaded screw 7, when a propylene oxidation reactor is used to prepare 1,3-propylene glycol, after a long reaction, when the catalyst fails seriously, the catalyst needs to be replaced, and the motor 1 8 is started to drive the bidirectional threaded screw 7 to rotate, drive the threaded slider 2 25 to move right along the slide groove 1 6 and the slide rail 2 5, drive the slider 1 24 to move left along the slide groove 1 6 and the slide rail 1 4, thereby driving the bending tube 1 9 and the bending tube 2 13 to move in the opposite direction until the joint tube 1304 is separated from the fixed plate 1702, and the cover door 3 is opened, and the motor 2 21 is started to drive the screw 20 to rotate, drive the threaded slider 3 1708 to move forward along the slide groove 2 19 and the slide rail 3 18, and drive the catalytic component 17 to extend out of the housing 2, so that the catalyst can be replaced.

[0036] Specifically, the slot 1302 is matched with the insert ring 1703, and the outer diameter of the joint pipe 1304 is the same as the inner diameter of the catalyst tube 1704. The advantage is that the slot 1302, the insert ring 1703 and the joint pipe 1304 are provided, and after the catalyst is replaced, the starting motor 21 drives the catalyst assembly 17 to move backward to correspond to the curved tube 1 9 and the curved tube 2 13, and the starting motor 18 drives the curved tube 1 9 and the curved tube 2 13 to move toward each other. In this process, the joint pipe 1304 is inserted into the catalyst tube 1704, and the insert ring 1703 is inserted into the slot 1302 until the sealing plate 1301 is in close contact with the fixing plate 1702, and the docking of the curved tube 1 9, the curved tube 2 13 and the catalyst assembly 17 is completed to form a tubular reactor.

[0037] Specifically, the structures of the bending pipe 1 9 and the bending pipe 2 13 are the same, the bending pipe 1 9 and the bending pipe 2 13 are centrally symmetrically distributed, and the three-way solenoid valve 1 11 and the three-way solenoid valve 2 15 are both "T"-shaped three-way valves. The advantage is that a three-way solenoid valve 11 and a three-way solenoid valve 2 15 are provided, and gas purging and high-temperature oxidation decoking can be performed during decoking. The three-way solenoid valve 11 is switched to connect the coke discharge outlet pipe 12 to the discharge pipe 10, and the three-way solenoid valve 2 15 is switched to connect the coke discharge inlet pipe 16 to the feed pipe 14. During the gas purging decoking operation, nitrogen or air is injected from the feed pipe 14 to purge the catalytic layer 1707 in the catalytic tube 1704, blow the coke off the catalytic layer 1707, and physically remove the coke. During high-temperature oxidation decoking, the heating tube 23 is started to heat the inside of the outer shell 2 to 500-700°C, and sufficient air is injected from the feed pipe 14 to convert the coke attached to the catalytic layer 1707 into carbon dioxide and water vapor for discharge, thereby removing the coke.

[0038] Embodiment 2: Figure 2-7 As shown, as an improvement to the previous embodiment.

[0039] Specifically, the ring width of the limiting ring 1705 is equal to the ring width of the catalyst frame 1706, the catalyst frame 1706 is slidably connected to the catalyst tube 1704, and the limiting ring 1705 is arranged on the left inside the catalyst tube 1704. The advantage is that the limiting ring 1705 is arranged, when the catalyst is replaced, the catalyst frame 1706 is pulled out from the right end of the catalyst tube 1704, and after the catalyst layer 1707 is replaced, the catalyst frame 1706 is slid and inserted into the catalyst tube 1704 again until the catalyst frame 1706 is in tight contact with the limiting ring 1705, and when the bent tube 13 is assembled with the catalyst assembly 17, the joint tube 1304 presses the catalyst frame 1706 against the right end of the limiting ring 1705, and the fixing effect is good.

[0040] Specifically, the slider 3 1708 is slidably connected to the slide rail 3 18 and the slide groove 2 19, and the screw 20 is threadedly connected to the slider 3 1708. The advantage is that the slide groove 2 19 and the screw 20 are provided, and the motor 2 21 is started to drive the screw 20 to rotate, thereby driving the slider 3 1708 to move along the slide groove 2 19 until the slider 3 1708 reaches the maximum stroke, at which time the catalyst tube 1704 extends out of the housing 2, which is convenient for the catalyst replacement operation.

[0041] Specifically, the heating tube 23 corresponds to the catalytic assembly 17, and the width of the catalytic assembly 17 is smaller than the width of the cover door 3. The advantage is that the width of the catalytic assembly 17 is smaller than the width of the cover door 3, which is convenient for replacement.

[0042] Working principle: During use, in the propylene oxidation reaction, carbon deposits will be generated on the catalyst surface due to side reactions or incomplete reactions. These deposits accumulate on the surface or in the pores of the catalyst to form coke. During decoking, gas purging and high-temperature oxidation decoking can be performed. Switch the three-way solenoid valve 11 to the coke discharge outlet pipe 12 connected to the discharge pipe 10, and switch the three-way solenoid valve 2 15 to the coke discharge inlet pipe 16 connected to the feed pipe 14. During the gas purging decoking operation, nitrogen or air is injected from the feed pipe 14 to purge the catalytic layer 1707 in the catalytic tube 1704, blow the coke off the catalytic layer 1707, and physically remove the coke. During high-temperature oxidation decoking, start the heating tube 23 to heat the inside of the shell 2 to 50 0~700°C, observe the internal temperature through the thermometer 22, inject sufficient air from the feed pipe 14, convert the coke attached to the catalyst layer 1707 into carbon dioxide and water vapor to be discharged, remove the coke, multiple decoking methods, convenient decoking process, good decoking effect, after a long time of reaction, when the catalyst is seriously ineffective, the catalyst needs to be replaced, start the motor 8 to drive the bidirectional threaded screw 7 to rotate, drive the threaded slider 25 to move right along the slide groove 6 and the slide rail 25, drive the slider 24 to move left along the slide groove 6 and the slide rail 4, thereby driving the bending pipe 9 and the bending pipe 10 to rotate. The curved pipe 13 moves in the opposite direction until the joint pipe 1304 is separated from the fixed plate 1702, the cover door 3 is opened, the motor 21 is started to drive the screw 20 to rotate, and the threaded slider 3 1708 is driven to move forward along the slide groove 2 19 and the slide rail 3 18, and the catalyst assembly 17 is driven to extend out of the housing 2, so that the catalyst can be replaced. When the catalyst is replaced, the catalyst frame 1706 is pulled out from the right end of the catalyst tube 1704, and after replacing the catalyst layer 1707, the catalyst frame 1706 is slid and inserted into the catalyst tube 1704 again until the catalyst frame 1706 contacts the limit ring 1705, and the catalyst is replaced. After completion, start motor 21 to drive the catalytic component 17 to move backward to correspond to bending tube 1 9 and bending tube 2 13, start motor 18 to drive bending tube 1 9 and bending tube 2 13 to move toward each other, during this process, the connecting pipe 1304 is inserted into the catalytic tube 1704, and the plug ring 1703 is inserted into the slot 1302 until the sealing plate 1301 is in tight contact with the fixing plate 1702, completing the docking of bending tube 1 9, bending tube 2 13 and catalytic component 17 to form a tubular reactor, and the connecting pipe 1304 presses the catalytic frame 1706 against the right end of the limiting ring 1705, which has a good fixing effect and is convenient for replacement.

[0043] 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 propylene oxidation reactor for convenient decoking, comprising a skeleton (1), characterized in that: The outer side of the skeleton (1) is fixedly connected to a shell (2), the front end of the shell (2) is fixedly connected to a cover door (3), the rear end of the shell (2) is fixedly connected to a slide rail 1 (4) and a slide rail 2 (5), the rear end of the shell (2) is fixedly connected to a slide groove 1 (6), the center of the slide groove 1 (6) is rotatably connected to a bidirectional threaded screw rod (7), the left side of the shell (2) is fixedly connected to a motor 1 (8), the inside of the skeleton (1) is provided with a bending tube 1 (9) and a bending tube 2 (13), the left side of the bending tube 1 (9) is fixedly connected to a discharge pipe (10), the outer side of the discharge pipe (10) is provided with a three-way solenoid valve 1 (11), the front interface of the three-way solenoid valve 1 (11) is fixedly connected to a coke discharge pipe (12), the right side of the bending tube 2 (13) is fixedly connected to a feed pipe (14), A three-way solenoid valve 2 (15) is arranged outside the feed pipe (14), a front interface of the three-way solenoid valve 2 (15) is fixedly connected to a coke discharge feed pipe (16), a catalytic component (17) is fixedly connected between the discharge pipe (10) and the feed pipe (14), a slide rail 3 (18) is fixedly connected to the bottom end of the skeleton (1), a slide groove 2 (19) is fixedly connected to the bottom end of the skeleton (1), a screw rod (20) is rotatably connected to the center of the slide groove 2 (19), a motor 2 (21) is fixedly connected to the rear end of the shell (2), a thermometer (22) is fixedly connected to the front end of the shell (2), a heating pipe (23) is fixedly connected to the rear end of the skeleton (1), a slider 1 (24) is fixedly connected to the rear end of the discharge pipe (10), and a slider 2 (25) is fixedly connected to the rear end of the feed pipe (14); The second bending tube (13) comprises a sealing plate (1301), a slot (1302), a bending tube body (1303) and a joint tube (1304); the slot (1302) is provided on the left side of the sealing plate (1301); the bending tube body (1303) is fixedly connected to the right side of the sealing plate (1301); and the joint tube (1304) is fixedly connected to the left side of the sealing plate (1301); The catalytic assembly (17) comprises a square frame (1701), a fixed plate (1702), an insert ring (1703), a catalytic tube (1704), a limiting ring (1705), a catalytic frame (1706), a catalytic layer (1707), and a third slider (1708). The fixed plates (1702) are fixedly connected to both sides of the square frame (1701). The insert ring (1703) is fixedly connected to the outer side of the fixed plate (1702). The catalytic tube (1704) is fixedly connected to the center of the fixed plate (1702). The limiting ring (1705) is fixedly connected to the inner wall of the catalytic tube (1704). The catalytic frame (1706) is arranged inside the catalytic tube (1704). The catalytic layer (1707) is fixedly connected to the outer wall of the catalytic frame (1706). The lower end of the square frame (1701) is fixedly connected to the third slider (1708).

2. A propylene oxidation reactor for convenient decoking according to claim 1, characterized in that: The slide rail 1 (4) is slidably connected to the slider 1 (24), the slide rail 2 (5) is slidably connected to the slider 2 (25), the slider 1 (24) and the slider 2 (25) are both slidably connected to the slide groove 1 (6), and the slider 1 (24) and the slider 2 (25) are both threadedly connected to the bidirectional threaded screw (7).

3. A propylene oxidation reactor for convenient decoking according to claim 1, characterized in that: The slot (1302) is matched with the insert ring (1703), and the outer diameter of the joint tube (1304) is the same as the inner diameter of the catalytic tube (1704).

4. A propylene oxidation reactor for convenient decoking according to claim 1, characterized in that: The structures of the bending pipe 1 (9) and the bending pipe 2 (13) are the same. The bending pipe 1 (9) and the bending pipe 2 (13) are centrally symmetrically distributed. The three-way solenoid valve 1 (11) and the three-way solenoid valve 2 (15) are both "T"-shaped three-way valves.

5. A propylene oxidation reactor for convenient decoking according to claim 1, characterized in that: The ring width of the limiting ring (1705) is equal to the ring width of the catalyst frame (1706), the catalyst frame (1706) and the catalyst tube (1704) are slidably connected, and the limiting ring (1705) is arranged on the left inside the catalyst tube (1704).

6. A propylene oxidation reactor for convenient decoking according to claim 1, characterized in that: The slider three (1708) is slidably connected to the slide rail three (18) and the slide groove two (19), and the screw rod (20) is threadedly connected to the slider three (1708).

7. A propylene oxidation reactor for convenient decoking according to claim 1, characterized in that: The heating tube (23) corresponds to the catalytic component (17), and the width of the catalytic component (17) is smaller than the width of the cover door (3).

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