CN115975665A - System and method for catalytic cracking of anhydride - Google Patents

Abstract

The invention discloses a system and a method for catalytic cracking of anhydride, which relate to the field of catalytic cracking of anhydride and solve the problem that hydrocarbon gas contains trace toxic substances and is directly discharged out of a device, so that the atmospheric environment is polluted; through the stirring subassembly and the supplementary subassembly of stirring that sets up, avoided catalyst and hydrocarbon gas reaction back, go into gaseous water in the inside row of device, gaseous water is stayed on the catalyst, go into the film, make the space between the catalyst granule reduce, thereby make the area of contact of catalyst and hydrocarbon gas reduce, lead to catalyst and hydrocarbon gas's reaction incomplete, it can't react completely to remain some gas in the messenger hydrocarbon gas, the slave unit discharges, because contain trace toxic material in the hydrocarbon gas, direct eduction gear, can cause the problem of pollution to the atmospheric environment, atmospheric environment's protecting effect has been improved.

Description

System and method for catalytic cracking of anhydride

Technical Field

The invention relates to the technical field of anhydride catalytic cracking, in particular to a system and a method for anhydride catalytic cracking.

Background

Anhydrides (Anhydrides) are the remaining part of an oxyacid after removal of one or a few molecules of water; generally, an inorganic acid is a molecule of the acid, and the anhydride of the acid is formed by directly losing one molecule of water, wherein the valence of the elements determining the acidity is unchanged, while an organic acid is formed by two or more molecules of the acid through intermolecular dehydration reactions, and the anhydride is present only in the oxo acid, and the anhydride is absent in the oxo acid.

The catalytic cracking is a process of producing low-carbon olefins such as ethylene, propylene, butylene and the like by cracking petroleum hydrocarbons at high temperature in the presence of a catalyst and simultaneously producing light aromatic hydrocarbons; due to the existence of the catalyst, the catalytic cracking can reduce the reaction temperature, increase the yield of the low-carbon olefin and the yield of the light aromatic hydrocarbon, and improve the flexibility of the distribution of the cracking products.

The preparation of the acid anhydride generally adopts a cracking furnace, hydrocarbon gas is discharged into the cracking furnace to react with a catalyst at high temperature to generate the acid anhydride and water, gaseous water is formed in the device after the catalyst reacts with the hydrocarbon gas, the gaseous water is remained on the catalyst to form a film, and gaps among catalyst particles are reduced, so that the contact area between the catalyst and the hydrocarbon gas is reduced, the reaction between the catalyst and the hydrocarbon gas is incomplete, a part of residual gas in the hydrocarbon gas can not be completely reacted, and the residual gas is discharged from equipment.

Disclosure of Invention

The invention aims to provide a system and a method for catalytic cracking of anhydride, which can solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a system and a method for catalytic cracking of anhydride comprise a cracking device main body, a support frame, a separation part, a connecting pipe and an air outlet pipe, wherein the support frame is fixedly installed at the bottom end of the cracking device main body;

the air inlet assembly comprises an air inlet pipe arranged on one side of the bottom end of the cracking equipment main body, the top end of the air inlet pipe is embedded into the cracking equipment main body, air outlet holes are uniformly formed in the outer wall of the top end of the air inlet pipe, and a guide plate is fixedly mounted at the top end of the air inlet pipe;

the stirring assembly comprises a rotating shaft arranged in the catalyst box, the rotating shaft is embedded into the top end of the catalyst box and is connected with the top end of the catalyst box in a rotating mode, the bottom end of the rotating shaft is embedded into the inner wall of a first connecting rod, a moving assembly is arranged in the first connecting rod, a containing assembly is arranged at the bottom end of the first connecting rod, a second connecting rod is fixedly installed on the outer wall of the rotating shaft, the top end of the second connecting rod is attached to the inner wall of the catalyst box, a rotating assembly is arranged between the second connecting rod and the catalyst box, and an auxiliary stirring assembly is arranged at the bottom end of the second connecting rod.

Preferably, the moving assembly comprises a first conical gear arranged inside a first connecting rod, the first conical gear is fixedly installed at the bottom end of the rotating shaft, a second conical gear is arranged on one side of the first conical gear in a meshed mode, a first gear is fixedly connected to one side of the second conical gear through a connecting rod, a first rack plate is arranged on one side of the first gear in a meshed mode, the first rack plate is embedded inside the first connecting rod and is in sliding connection with the first conical gear, a third connecting rod is fixedly connected to the bottom end of the first rack plate and is arranged at the bottom end of the catalyst box, and a first restoring assembly is arranged between the first rack plate and the first connecting rod, so that the auxiliary stirring assembly can scatter catalyst particles inside the catalyst box in the rotating process of the second connecting rod, gaps between the catalyst and the catalyst are guaranteed, and the catalyst and hydrocarbon gas can be fully reacted.

Preferably, first recovery subassembly is including setting up the first fixed block between first rack board and the main part of the cracking equipment, first fixed block fixed mounting is in one side on first rack board top, the bottom of first fixed block is provided with first spring, first spring setting is in the inside of head rod, conveniently under the effect that holds the subassembly, makes it remove once more, makes to mix the subassembly and repeatedly rotates, guarantees to stir the scattered effect of catalyst granule.

Preferably, hold the subassembly including setting up the connecting block in the head rod bottom, connecting block fixed mounting is in the bottom of third connecting rod, the both sides of connecting block all are provided with flourishing connecting plate, two flourishing connecting plate symmetry sets up, two all rotate through first bull stick between flourishing connecting plate and the connecting block and be connected, the internally mounted of first bull stick has first torsion spring, and under the cooperation of first answer subassembly, flourishing connecting plate rebound to flourishing connecting plate rebound position under first torsion spring's effect, repeat above step, provide power for stirring the subassembly.

Preferably, the rotating assembly comprises an annular rack plate arranged between the second connecting rod and the catalyst box, the annular rack plate is fixedly installed on the inner wall of the catalyst box, a second gear is arranged at the bottom end of the annular rack plate in a meshed mode, the second gear is arranged inside the second connecting rod, a fourth connecting rod is fixedly connected to one side of the second gear, a third bevel gear is fixedly connected to one end, away from the second gear, of the fourth connecting rod, a fourth bevel gear is arranged at the top end of the third bevel gear in a meshed mode, a fifth connecting rod is fixedly connected to the bottom end of the fourth bevel gear, a fifth bevel gear is arranged at the bottom end of the third bevel gear in a meshed mode, a sixth connecting rod is fixedly connected to the bottom end of the fifth bevel gear in a sleeved mode, the sixth connecting rod is sleeved on the outer wall of the fifth connecting rod, connecting plates are sleeved on the outer walls of the fifth connecting rod and the sixth connecting rod, the fourth bevel gear and the fifth bevel gear are symmetrically arranged, the fourth bevel gear and the fifth bevel gear are opposite in rotating direction, the sixth connecting rod and the fifth connecting rod are opposite in rotating direction, and stirring effect on catalyst particles is improved.

Preferably, the annular rack plate is the annular setting, and uses the axle center of axis of rotation to evenly arrange for circular, can make the annular rack plate be the engaged state with the second gear all the time at stirring subassembly pivoted in-process, lets the second gear revolve to the supplementary subassembly rotation of stirring of drive.

Preferably, supplementary stirring subassembly is including setting up the second fixed block in second connecting rod bottom, the outer wall of fifth connecting rod and sixth connecting rod all fixed mounting have the second fixed block, the outer wall of second fixed block is provided with the stirring rod, be provided with the second between second fixed block and the stirring rod and reply the subassembly, the one end that the second fixed block was kept away from to the stirring rod is provided with the third and replies the subassembly, has gaseous water to produce after avoiding hydrocarbon gas and catalyst reaction, and the water film covers on the catalyst surface, influences the reaction area of contact of catalyst and hydrocarbon gas, has guaranteed the reaction of catalyst and hydrocarbon gas.

Preferably, the subassembly is replied including setting up the fixed plate between second fixed block and stirring rod to the second, the fixed plate is installed respectively in the both sides of stirring rod, and with second fixed block fixed connection, rotate through the second dwang between stirring rod and the fixed plate and be connected, the inner wall of second dwang is provided with second torque spring, and after the stirring rod rotates, under second torque spring's effect, the stirring rod turned back original position, made the stirring rod vibrate from top to bottom, improves the stirring effect to the catalyst granule.

Preferably, the third replies the subassembly including setting up the seventh connecting rod of keeping away from second fixed block one end at the stirring rod, seventh connecting rod fixed mounting is in the one end of stirring rod, one side of seventh connecting rod is provided with the stirring board, the stirring board is provided with two, and the symmetry sets up, two rotate through the third dwang between the stirring board and connect, the inner wall and the embedding at the eighth connecting rod of stirring board are passed at the both ends of third dwang, eighth connecting rod fixed mounting is in one side of seventh connecting rod, third torsion spring is installed to the inner wall of third dwang, gives the power of applying of two stirring boards through the catalyst, makes two stir the board and rotates, and two stir the board and take place to vibrate under third torsion spring's effect, have improved the effect of scattering to the catalyst granule.

A process for catalytic cracking of anhydrides:

s1: firstly, starting a device to discharge hydrocarbon gas to be reacted into the interior of a cracking equipment main body from a gas inlet pipe;

s2: after the hydrocarbon gas and the catalyst react at high temperature, acid anhydride and water are generated;

s3: the water drops in the containing plate, and when more and more water is contained in the containing plate, the containing plate moves downwards to drive the stirring component and the auxiliary stirring component to rotate so as to stir and disperse catalyst particles in the catalyst box;

s4: and discharging the acid anhydride and the water into the separation part through a connecting pipe, and separating the acid anhydride and the water to obtain a product.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, through the stirring assembly and the auxiliary stirring assembly, after the catalyst reacts with the hydrocarbon gas, the generated water falls into the containing assembly, the containing assembly is driven to move downwards by the gravity of the water, the stirring assembly is powered by the rotating assembly, so that the stirring assembly and the auxiliary stirring assembly rotate in the catalyst box, catalyst particles placed in the catalyst box are stirred and dispersed, gaseous water is formed in the device after the catalyst reacts with the hydrocarbon gas, the gaseous water is stopped on the catalyst and forms a film, gaps among the catalyst particles are reduced, the contact area between the catalyst and the hydrocarbon gas is reduced, the reaction between the catalyst and the hydrocarbon gas is incomplete, a part of gas remaining in the hydrocarbon gas cannot be completely reacted, the hydrocarbon gas is discharged from equipment, the hydrocarbon gas directly discharges the device due to the trace toxic substances, the problem of pollution to the atmospheric environment is caused, and the protection effect of the atmospheric environment is improved.

2. According to the invention, through the arranged moving assembly, the first rack plate can be driven to move downwards under the coordination of the containing assembly, the first rack plate is driven to rotate by the movement of the first rack plate, the second bevel gear and the first bevel gear are driven to rotate by the rotation of the first gear, so that the second connecting rod is driven to rotate, the top end of the second connecting rod is attached to the catalyst box, the membrane of the upward stroke of the inner wall of the catalyst box is broken by the rotation of the second connecting rod, the circulation of the cavity of the inner wall of the catalyst box is ensured, meanwhile, the auxiliary stirring assembly is driven to rotate by the rotation of the moving assembly, so that the auxiliary stirring assembly is used for scattering catalyst particles in the catalyst box in the rotating process of the second connecting rod, the gap between the catalyst and the catalyst is ensured, and the full reaction of the catalyst and hydrocarbon gas is ensured.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the overall structure of the present invention;

FIG. 3 is a schematic cross-sectional view of a catalyst cartridge according to the present invention;

FIG. 4 is a schematic cross-sectional view of a baffle according to the present invention;

FIG. 5 is a schematic view of the agitation assembly of the present invention;

FIG. 6 is a schematic view of the holding assembly of the present invention;

FIG. 7 is a schematic view of the rotating assembly of the present invention;

FIG. 8 is a schematic view of the auxiliary agitating assembly according to the present invention;

FIG. 9 is a schematic view of the moving assembly of the present invention;

FIG. 10 is a schematic view of the stirring rod of the present invention;

fig. 11 is a schematic structural diagram of a third restoring assembly according to the present invention.

In the figure: 1. a main body of the cracking apparatus; 2. a support frame; 3. a separation section; 4. a connecting pipe; 5. an air outlet pipe; 6. an air inlet pipe; 7. an air outlet; 8. a baffle; 9. a catalyst cartridge; 10. a rotating shaft; 11. a first connecting rod; 12. a second connecting rod; 13. a first bevel gear; 14. a second bevel gear; 15. a first gear; 16. a first rack plate; 17. a third connecting rod; 18. a first fixed block; 19. a first spring; 20. connecting blocks; 21. a receiving plate; 22. a first rotating lever; 23. a first torsion spring; 24. an annular rack plate; 25. a second gear; 26. a fourth connecting rod; 27. a third bevel gear; 28. a fourth bevel gear; 29. a fifth connecting rod; 30. a fifth bevel gear; 31. a sixth connecting rod; 32. a connecting plate; 33. a second fixed block; 34. a stirring rod; 35. a fixing plate; 36. a second rotating lever; 37. a second torsion spring; 38. a seventh connecting rod; 39. stirring the plate; 40. a third rotating rod; 41. an eighth connecting rod; 42. a third torsion spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-8, a system and a method for catalytic cracking of anhydride in the figures include a cracking device main body 1, a support frame 2, a separation part 3, a connecting pipe 4 and an air outlet pipe 5, wherein the support frame 2 is fixedly installed at the bottom end of the cracking device main body 1, an air inlet assembly is arranged at one side of the bottom end of the cracking device main body 1, the separation part 3 is arranged at one side of the cracking device main body 1, the cracking device main body 1 is connected with the separation part 3 through the connecting pipe 4, the air outlet pipe 5 is fixedly installed at the top end of the separation part 3, a catalyst box 9 is arranged inside the cracking device main body 1, and a stirring assembly is arranged inside the catalyst box 9;

the gas inlet assembly comprises a gas inlet pipe 6 arranged on one side of the bottom end of the cracking device main body 1, the top end of the gas inlet pipe 6 is embedded into the cracking device main body 1, gas outlet holes 7 are uniformly formed in the outer wall of the top end of the gas inlet pipe 6, and a guide plate 8 is fixedly mounted at the top end of the gas inlet pipe 6;

mix the subassembly including setting up axis of rotation 10 inside catalyst box 9, axis of rotation 10 imbeds on the top of catalyst box 9, and rotate and connect, the bottom embedding of axis of rotation 10 is at the inner wall of first connecting rod 11, the inside of first connecting rod 11 is provided with removes the subassembly, the bottom of first connecting rod 11 is provided with holds the subassembly, the outer wall fixed mounting of axis of rotation 10 has second connecting rod 12, the top of second connecting rod 12 and the laminating of the inner wall of catalyst box 9, be provided with rotating assembly between second connecting rod 12 and the catalyst box 9, the bottom of second connecting rod 12 is provided with supplementary stirring subassembly, stir subassembly and supplementary stirring subassembly through the setting, after catalyst and hydrocarbon gas reaction, the produced water drops to holding inside the subassembly, because the gravity drive of water holds the subassembly and moves down, for stirring the subassembly provides power through rotating the subassembly, make stirring subassembly and supplementary stirring subassembly rotate in the inside of catalyst box 9, stir the catalyst granule of placing inside catalyst box 9 and scatter, after having avoided catalyst and hydrocarbon gas reaction, form gaseous water inside the device, gaseous water stops on the catalyst, make the gaseous water, make the catalyst reduce the space between the catalyst and the gaseous hydrocarbon gas contact with the gaseous hydrocarbon gas and can's environment and can's the discharge the problem completely, thereby the gaseous pollutant discharge can not cause the gaseous pollutant discharge problem of the gas, the environment.

The moving component comprises a first conical gear 13 arranged inside a first connecting rod 11, the first conical gear 13 is fixedly arranged at the bottom end of a rotating shaft 10, one side of the first conical gear 13 is provided with a second conical gear 14 in a meshed manner, one side of the second conical gear 14 is fixedly connected with a first gear 15 through a connecting rod, one side of the first gear 15 is provided with a first rack plate 16 in a meshed manner, the first rack plate 16 is embedded inside the first connecting rod 11 and is in sliding connection, the bottom end of the first rack plate 16 is fixedly connected with a third connecting rod 17, the third connecting rod 17 is arranged at the bottom end of the catalyst box 9, a first recovery component is arranged between the first rack plate 16 and the first connecting rod 11, and under the matching of the containing component, the first rack plate 16 is driven to move downwards, the first gear 15 is driven to rotate by the movement of the first rack plate 16, the second bevel gear 14 and the first bevel gear 13 are driven to rotate by the rotation of the first gear 15, so that the second connecting rod 12 is driven to rotate, the top end of the second connecting rod 12 is attached to the catalyst box 9, the membrane on the upper stroke of the inner wall of the catalyst box 9 is broken by the rotation of the second connecting rod 12, the circulation of the cavity on the inner wall of the catalyst box 9 is ensured, meanwhile, the rotation of the moving component drives the auxiliary stirring component to rotate, so that the auxiliary stirring component breaks catalyst particles in the catalyst box 9 in the rotating process of the second connecting rod 12, gaps between the catalyst and the catalyst are ensured, and the full reaction of the catalyst and hydrocarbon gas is ensured.

The first recovery assembly comprises a first fixing block 18 arranged between a first rack plate 16 and the cracking equipment main body 1, the first fixing block 18 is fixedly installed on one side of the top end of the first rack plate 16, a first spring 19 is arranged at the bottom end of the first fixing block 18, the first spring 19 is arranged inside a first connecting rod 11, and through the first recovery assembly arranged, when the moving assembly moves downwards, the first fixing block 18 downwards extrudes the first spring 19 to slide in the inside of the first connecting rod 11, after the liquid in the moving assembly is poured, the first fixing block 18 drives the first rack plate 16 to move upwards under the action of the first spring 19, so that the moving assembly rotates again, the first rack plate 16 moves upwards in the inside of the first connecting rod 11 to recover to the original position, the moving assembly is convenient to move again under the action of the moving assembly, the stirring assembly rotates repeatedly, and the stirring effect on catalyst particles is guaranteed.

The containing components comprise connecting blocks 20 arranged at the bottom ends of the first connecting rods 11, the connecting blocks 20 are fixedly arranged at the bottom ends of the third connecting rods 17, containing plates 21 are arranged on two sides of each connecting block 20, the two containing plates 21 are symmetrically arranged, the two containing plates 21 and the connecting blocks 20 are rotatably connected through first rotating rods 22, first torsion springs 23 are arranged inside the first rotating rods 22, the containing plates 21 move upwards under the action of gravity after catalysts react with hydrocarbon gas to generate acid anhydride and water, power is provided for the moving components, when the objects contained inside the containing plates 21 reach a certain amount, the containing plates 21 rotate downwards, the reaction products inside the grooves of the containing plates 21 are poured out and flow to the bottom ends of the cracking equipment main bodies 1, the containing plates 21 move upwards through connecting pipes 4 at the bottom ends of the cracking equipment main bodies 1, the containing plates 21 move upwards under the cooperation of the first return components, the reaction products rotate upwards under the action of the first torsion springs 23, the stirring components are stirred to form a repeated step.

The rotating assembly comprises an annular rack plate 24 arranged between the second connecting rod 12 and the catalyst box 9, the annular rack plate 24 is fixedly arranged on the inner wall of the catalyst box 9, a second gear 25 is arranged at the bottom end of the annular rack plate 24 in a meshed manner, the second gear 25 is arranged inside the second connecting rod 12, a fourth connecting rod 26 is fixedly connected to one side of the second gear 25, a third bevel gear 27 is fixedly connected to one end, away from the second gear 25, of the fourth connecting rod 26, a fourth bevel gear 28 is arranged at the top end of the third bevel gear 27 in a meshed manner, a fifth connecting rod 29 is fixedly connected to the bottom end of the fourth bevel gear 28, a fifth bevel gear 30 is arranged at the bottom end of the third bevel gear 27 in a meshed manner, a sixth connecting rod 31 is fixedly connected to the bottom end of the fifth bevel gear 30, and the sixth connecting rod 31 is sleeved on the outer wall of the fifth connecting rod 29, the outer walls of the fifth connecting rod 29 and the sixth connecting rod 31 are sleeved with the connecting plates 32, through the arranged rotating assembly, in the rotating process of the stirring assembly, the second gear 25 and the annular rack plate 24 are meshed to rotate, the rotation of the second gear 25 drives the third bevel gear 27 to rotate, the rotation of the third bevel gear 27 drives the fourth bevel gear 28 and the fifth bevel gear 30 to rotate, the sixth connecting rod 31 and the fifth connecting rod 29 are made to rotate, the auxiliary stirring assembly is made to rotate, and due to the fact that the fourth bevel gear 28 and the fifth bevel gear 30 are symmetrically arranged, the rotating directions of the fourth bevel gear 28 and the fifth bevel gear 30 are opposite, the rotating directions of the sixth connecting rod 31 and the fifth connecting rod 29 are opposite, and the stirring effect on catalyst particles is improved.

The annular rack plate 24 is the annular setting, and uses the axle center of axis of rotation 10 to evenly arrange for circular, and the annular rack plate 24 through setting up is the ring form, can make the annular rack plate 24 be the engaged state with second gear 25 all the time at stirring subassembly pivoted in-process, lets second gear 25 rotate to it rotates to drive supplementary stirring subassembly.

A process for catalytic cracking of anhydrides:

s1: firstly, starting a device to discharge hydrocarbon gas to be reacted into the cracking equipment main body 1 from an air inlet pipe 6;

s2: after the hydrocarbon gas and the catalyst react at high temperature, acid anhydride and water are generated;

s3: water drops fall into the containing plate 21, and when more and more water is contained in the containing plate 21, the containing plate 21 moves downwards to drive the stirring component and the auxiliary stirring component to rotate, so that catalyst particles in the catalyst box 9 are stirred;

s4: the acid anhydride and water are discharged into the separation section 3 through the connection pipe 4, and the acid anhydride and water are separated to obtain a product.

Example 2

Referring to fig. 8-10, in this embodiment, as further described in embodiment 1, the auxiliary stirring assembly includes a second fixed block 33 disposed at the bottom end of the second connecting rod 12, the second fixed blocks 33 are fixedly mounted on the outer walls of the fifth connecting rod 29 and the sixth connecting rod 31, a stirring rod 34 is disposed on the outer wall of the second fixed block 33, a second restoring assembly is disposed between the second fixed block 33 and the stirring rod 34, and a third restoring assembly is disposed at an end of the stirring rod 34 away from the second fixed block 33.

The second replying component comprises a fixing plate 35 arranged between a second fixing block 33 and a stirring rod 34, the fixing plate 35 is respectively arranged at two sides of the stirring rod 34 and is fixedly connected with the second fixing block 33, the stirring rod 34 is rotatably connected with the fixing plate 35 through a second rotating rod 36, a second torsion spring 37 is arranged on the inner wall of the second rotating rod 36, through the arranged second replying component, in the rotating process of the auxiliary stirring component, the stirring rod 34 is inserted into catalyst particles, the stirring rod 34 is extruded to rotate under the pressure of the catalyst, after the stirring rod 34 rotates, under the action of the second torsion spring 37, the stirring rod 34 rotates to the original position, the stirring rod 34 vibrates up and down, and the stirring effect on the catalyst particles is improved.

Example 3

Referring to fig. 11, in this embodiment, for further explanation of other embodiments, in the illustration, the third restoring assembly includes a seventh connecting rod 38 disposed at an end of the stirring rod 34 away from the second fixed block 33, the seventh connecting rod 38 is fixedly mounted at an end of the stirring rod 34, an agitating plate 39 is disposed at one side of the seventh connecting rod 38, the agitating plates 39 are symmetrically disposed, the two agitating plates 39 are rotatably connected by a third rotating rod 40, two ends of the third rotating rod 40 penetrate through inner walls of the agitating plates 39 and are embedded in inner walls of an eighth connecting rod 41, the eighth connecting rod 41 is fixedly mounted at one side of the seventh connecting rod 38, a third torsion spring 42 is mounted on an inner wall of the third rotating rod 40, and by the third restoring assembly, the two agitating plates 39 are symmetrically disposed in a triangular shape, so that end portions of the two agitating plates are embedded in the catalyst during rotation to agitate the catalyst, and when the fifth connecting rod 29 or the sixth connecting rod 31 rotates, a force is applied to the two agitating plates 39 to rotate, and the two agitating plates 39 vibrate and disperse particles.

The working principle is that firstly, the device is started, hydrocarbon gas to be reacted is discharged into the cracking device main body 1 from the gas inlet pipe 6 and reacts with a catalyst at a high temperature, the hydrocarbon gas is anhydride and water after the reaction, the water drops into the containing plate 21, when the water contained in the containing plate 21 increases, the containing plate 21 moves downwards, the movement of the containing plate 21 drives the connecting block 20 to move, the movement of the connecting block 20 drives the third connecting rod 17 to move, the movement of the third connecting rod 17 drives the first rack plate 16 to slide downwards in the first connecting rod 11, the first connecting rod 11 slides downwards through the inner wall of the bottom end of the catalyst box 9 and continues to move downwards, the movement of the first rack plate 16 drives the first gear 15 to rotate, the rotation of the first bevel gear 14 drives the rotation of the second bevel gear 14, the rotation of the second bevel gear 14 drives the rotation of the first bevel gear 13, the rotation of the first bevel gear 13 drives the rotation of the rotation shaft 10, the rotation of the rotation shaft 10 drives the rotation of the second connecting rod 12, the rotation of the second connecting rod 12 drives the rotation of the second gear 25, the rotation of the second bevel gear 25, the fifth bevel gear 24 is meshed with the rotation of the third bevel gear 30, the fifth bevel gear 30, the rotation of the fifth bevel gear 30 is meshed with the fourth bevel gear 30, the third gear 30, the fifth bevel gear 30, the fourth bevel gear 30 and the fourth bevel gear 30, the fifth gear 30 are driven by the fifth gear box 30, the fifth gear box 30, the rotation of the fixed plate 35 drives the rotation of the stirring rod 34, the rotation of the stirring rod 34 drives the seventh connecting rod 38 to rotate, and the seventh connecting rod 38 drives the stirring plate 39 to rotate, so as to stir up the catalyst particles in the catalyst box 9.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process-method-article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process-method-article or apparatus.

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

Claims (10)

1. The utility model provides a be used for anhydride catalytic cracking system, includes cracking equipment main part (1), support frame (2), separation portion (3), connecting pipe (4) and outlet duct (5), the bottom fixed mounting of cracking equipment main part (1) has support frame (2), one side of cracking equipment main part (1) bottom is provided with the subassembly that admits air, one side of cracking equipment main part (1) is provided with separation portion (3), be connected through connecting pipe (4) between cracking equipment main part (1) and separation portion (3), the top fixed mounting of separation portion (3) has outlet duct (5), its characterized in that: a catalyst box (9) is arranged in the cracking equipment main body (1), and a stirring component is arranged in the catalyst box (9);

the gas inlet assembly comprises a gas inlet pipe (6) arranged on one side of the bottom end of the cracking device main body (1), the top end of the gas inlet pipe (6) is embedded into the cracking device main body (1), gas outlet holes (7) are uniformly formed in the outer wall of the top end of the gas inlet pipe (6), and a guide plate (8) is fixedly mounted at the top end of the gas inlet pipe (6);

the stirring component comprises a rotating shaft (10) arranged inside a catalyst box (9), the rotating shaft (10) is embedded into the top end of the catalyst box (9) and is connected in a rotating mode, the bottom end of the rotating shaft (10) is embedded into the inner wall of a first connecting rod (11), a moving component is arranged inside the first connecting rod (11), a containing component is arranged at the bottom end of the first connecting rod (11), a second connecting rod (12) is fixedly arranged on the outer wall of the rotating shaft (10), the top end of the second connecting rod (12) is attached to the inner wall of the catalyst box (9), a rotating component is arranged between the second connecting rod (12) and the catalyst box (9), and an auxiliary stirring component is arranged at the bottom end of the second connecting rod (12).

2. The system for catalytic cracking of acid anhydride according to claim 1, wherein: the movable assembly comprises a first conical gear (13) arranged inside a first connecting rod (11), the first conical gear (13) is fixedly installed at the bottom end of a rotating shaft (10), one side of the first conical gear (13) is meshed with a second conical gear (14), one side of the second conical gear (14) is fixedly connected with a first gear (15) through a connecting rod, one side of the first gear (15) is meshed with a first rack plate (16), the first rack plate (16) is embedded inside the first connecting rod (11) and is in sliding connection with the first conical gear, the bottom end of the first rack plate (16) is fixedly connected with a third connecting rod (17), the third connecting rod (17) is arranged at the bottom end of a catalyst box (9), and a first recovery assembly is arranged between the first rack plate (16) and the first connecting rod (11).

3. The system for catalytic cracking of acid anhydride according to claim 2, wherein: the first recovery assembly comprises a first fixing block (18) arranged between a first rack plate (16) and the main cracking device body (1), the first fixing block (18) is fixedly installed on one side of the top end of the first rack plate (16), a first spring (19) is arranged at the bottom end of the first fixing block (18), and the first spring (19) is arranged inside a first connecting rod (11).

4. The system for catalytic cracking of acid anhydride according to claim 1, wherein: hold the subassembly including setting up connecting block (20) in first connecting rod (11) bottom, connecting block (20) fixed mounting is in the bottom of third connecting rod (17), the both sides of connecting block (20) all are provided with receiving plate (21), two receiving plate (21) symmetry sets up, two between receiving plate (21) and connecting block (20) all rotate through first rotation pole (22) and be connected, the internally mounted of first rotation pole (22) has first torsion spring (23).

5. The system for catalytic cracking of acid anhydride according to claim 1, wherein: the rotating assembly comprises an annular rack plate (24) arranged between a second connecting rod (12) and a catalyst box (9), the annular rack plate (24) is fixedly arranged on the inner wall of the catalyst box (9), a second gear (25) is arranged at the bottom end of the annular rack plate (24) in a meshed mode, the second gear (25) is arranged inside the second connecting rod (12), a fourth connecting rod (26) is fixedly connected to one side of the second gear (25), a third bevel gear (27) is fixedly connected to one end, far away from the second gear (25), of the fourth connecting rod (26), a fourth bevel gear (28) is arranged at the top end of the third bevel gear (27) in a meshed mode, a fifth connecting rod (29) is fixedly connected to the bottom end of the fourth bevel gear (28), a fifth bevel gear (30) is arranged at the bottom end of the third bevel gear (27) in a meshed mode, a sixth connecting rod (31) is fixedly connected to the outer wall of the fifth connecting rod (29) in a sleeved mode, and the outer wall of the fifth connecting rod (29) and a connecting plate (32) are sleeved with the outer wall of the sixth connecting rod (31).

6. The system for catalytic cracking of acid anhydride according to claim 5, wherein: the annular rack plate (24) is arranged annularly and is uniformly distributed in a circular manner by taking the axis of the rotating shaft (10) as a center.

7. The system for catalytic cracking of acid anhydride according to claim 5, wherein: supplementary stirring subassembly is including setting up second fixed block (33) in second connecting rod (12) bottom, the outer wall of fifth connecting rod (29) and sixth connecting rod (31) is fixed mounting all has second fixed block (33), the outer wall of second fixed block (33) is provided with stirring rod (34), be provided with the second between second fixed block (33) and stirring rod (34) and reply the subassembly, the one end that second fixed block (33) were kept away from in stirring rod (34) is provided with the third and replies the subassembly.

8. The system for catalytic cracking of acid anhydride according to claim 7, wherein: the subassembly is replied including setting up fixed plate (35) between second fixed block (33) and stirring rod (34) to the second, the both sides at stirring rod (34) are installed respectively in fixed plate (35), and with second fixed block (33) fixed connection, rotate through second dwang (36) between stirring rod (34) and fixed plate (35) and be connected, the inner wall of second dwang (36) is provided with second torsion spring (37).

9. The system for catalytic cracking of acid anhydride according to claim 7, wherein: the third replies the subassembly including setting up seventh connecting rod (38) of keeping away from second fixed block (33) one end at stirring rod (34), seventh connecting rod (38) fixed mounting is in the one end of stirring rod (34), one side of seventh connecting rod (38) is provided with stirring board (39), stirring board (39) are provided with two, and the symmetry sets up, two rotate through third dwang (40) between stirring board (39) and connect, the inner wall of stirring board (39) and embedding are at the inner wall of eighth connecting rod (41) are passed at the both ends of third dwang (40), eighth connecting rod (41) fixed mounting is in one side of seventh connecting rod (38), third torsion spring (42) are installed to the inner wall of third dwang (40).

10. The catalytic cracking process for acid anhydride according to claim 1, wherein:

s1: firstly, starting a device to discharge hydrocarbon gas to be reacted into the cracking equipment main body (1) from an air inlet pipe (6);

s2: after the hydrocarbon gas and the catalyst react at high temperature, acid anhydride and water are generated;

s3: water drops in the containing plate (21), when more and more water is contained in the containing plate (21), the containing plate (21) moves downwards to drive the stirring assembly and the auxiliary stirring assembly to rotate, and catalyst particles in the catalyst box (9) are stirred;

s4: the acid anhydride and water are discharged into the separation part (3) through a connecting pipe (4), and the acid anhydride and the water are separated to obtain a product.

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