CN111333482B - Continuous reforming device for refining dimethylbenzene - Google Patents

Abstract

A continuous reforming device for refining dimethylbenzene comprises a carclazyte tower, wherein the carclazyte tower comprises a tower body, a first ceramic ball layer, a quartz sand layer, a white soil layer and a second ceramic ball layer are sequentially arranged in the tower body from bottom to top, third ceramic ball layer, the quartz sand layer, the white soil layer, second ceramic ball layer, third ceramic ball layer comprises the several cylinder mould, the top central authorities of cylinder mould set up the recess, respectively set up a fixed plate on two long cell walls of recess, the centre of two fixed plates sets up the link, the one end both sides of link respectively with the one end fixed connection of a connecting rod, the shifting chute that the other end of connecting rod set up on passing the fixed plate is connected with the slider, the slider is located the spout that sets up in the fixed plate, the both sides opening setting of the top recess of cylinder mould, the open-top department of cylinder mould sets up the separation net of semicircle form, the top central point of tower body puts and sets up through the groove, the cylinder mould can pass through the groove. The invention realizes simple operation, convenient and fast use and effectively improves the filling and cleaning efficiency of the carclazyte tower.

Description

Continuous reforming device for refining dimethylbenzene

Technical Field

The invention belongs to the field of petrochemical industry, and particularly relates to a continuous reforming device for refining dimethylbenzene.

Background

The xylene can be used as a solvent in the industries of paint, resin, dye, ink and the like, can be used as a synthetic monomer or solvent in the industries of medicine, explosive, pesticide and the like, can also be used as a high-octane gasoline component, and is an important raw material of organic chemical industry. It can also be used for removing asphalt from vehicle body. The preparation is mainly used in the hospital pathology department. The method is mainly used for dehydration and dewaxing.

The patent numbers are: 201110312558.X, name: the utility model provides a refining plant and method of continuous reforming unit xylol, provides one kind and can adopt white clay tower rear mode to operate at the initial stage of operation, can conveniently change into white clay tower front mode and operate in the operation later stage, wherein the white clay tower is the device that uses most in the xylol is refined, but the filling of white clay tower and the clearance reload operation after the inefficacy are very loaded down with trivial details, and inefficiency to waste great manpower and material resources.

The existing filling operation of the clay tower is as follows:

1. confirming the isolation state of the clay tower and other equipment pipelines, and opening a top manhole and a bottom side manhole;

2. introducing air to purge the interior of the container, and closing the container and ensuring the circulation of the air in the container after ensuring the oxygen content and other gases to be qualified;

3. checking and confirming that the interior of the container is clean and dry;

4. installing and checking the outlet basket, determining that the outlet basket is correctly installed and the meshes are intact, and completing the installation of equipment and internal parts while installing;

5. the filling personnel wear the protective glasses and the mask, the clothes are fastened to prevent carclazyte from directly contacting skin and eyes, and the personnel entering the equipment are required to wear safety protection measures such as an air respirator, a safety goggles, a safety rope, an interphone and the like;

6. and (4) inspecting the quality of the ceramic balls, screening out and removing dust if the ceramic balls are broken, filling the ceramic balls and quartz sand to required positions, and leveling all layers. The personnel inside the leveling and filling process equipment should work on a suspended platform or plank to prevent the layers from becoming tangled. The ceramic balls and the quartz sand are large in quality and fragile, and are slowly conveyed to the bottom of the equipment from a manhole at the side surface, and the side surface population is normally sealed after the ceramic balls are filled;

7. the filling of the white soil layer is started, the top manhole is prevented from being greatly impacted to the bottom to cause disorder of each layer, and the white soil is slowly conveyed to the bottom to be filled with half a meter, and then the hopper and the canvas cylinder are used for filling. Personnel in the container can make the canvas bag rotate around the ring as much as possible, and ensure that the white soil layer is horizontally piled up, the distance between the opening of the canvas cylinder and the white soil layer is not more than one meter, fragments of the canvas cylinder are well stored and taken out of the equipment, and the fragments are paved once per meter in the filling process;

8. finishing filling the argil and the porcelain balls to a preset height;

9. the packaging report must be carefully filled out, including: the number of clay, quartz sand and porcelain balls, clay batch number;

10. after the carclazyte is filled, checking whether the length of fragments of the canvas cylinder, the number of template tools and the like are consistent with those before filling, preventing sundries such as tools from being left in the carclazyte tower, heating other sundries to damage the carclazyte, checking the distributor, confirming that the installation position is correct, and sealing a manhole;

11. and (4) removing the related blind plate, and closing the valves of the clay tower inlet and outlet. And performing nitrogen replacement in time.

The existing treatment method after the clay in the clay tower is invalid is as follows:

1. non-aromatic hydrocarbons from the top of the extraction tower are used through an oil removing flushing line, the aromatic hydrocarbons in the tower are changed into a separation tower through an oil discharging line for 32C-201 years, the aromatic hydrocarbon content is sampled and analyzed, and ammonia gas is used for blowing residual carbon-chlorine compounds to the separation tower for 32C-201 reforming after the aromatic hydrocarbons are qualified. The liquid flow rate can be confirmed by venting any remaining hydrocarbons through a sight glass on the line where the separation column is de-reformed. Checking and judging whether the culture is empty or not; 2. closing a valve for removing reforming, maintaining the micro-positive pressure of the clay tower by using ammonia gas, opening a valve to a torch, and blowing the clay tower by using steam; 3. periodically opening a hang-up valve to check whether steam or condensate is flowing from the column, and continuing the steam purge until there are no hydrocarbons; 4. stopping steam blowing when no hydrocarbon exists, cooling the clay bed layer in a nitrogen environment, and then unloading the soil; 5. and (4) completely adding blind plates to isolate pipelines connected with the clay tower and other systems, opening a manhole, discharging the clay through the manhole, and then filling.

And the filling process can be completed by manual operation and long time span, which requires several days, so that more attention is paid:

1. the clay filling must be carried out on a sunny day, the clay filling process is prevented from being affected with damp, the clay can be opened when being used, and the time of exposure in the air is shortest as much as possible;

2. the length of the canvas cylinder and the number of wood board tools and the like are carefully recorded before filling the argil.

3. The clay needs to be carefully prevented from being damaged in the process, the clay needs to be loaded and loaded by a canvas cylinder, the free falling height is small in the loading process, the maximum allowable free falling height is 1 m, internal personnel cannot directly walk on the clay, the clay needs to walk on a wood board with the minimum size of 550mm by 550mm, and the clay is uniformly distributed after being flatly paved every time when being loaded one meter.

4. If there is no corresponding protection in the rain or snow weather, the clay fill must be stopped immediately. When the filling process must be stopped due to rain, the manhole at the top of the clay tower is not covered by a sealing cover, and purified air is introduced into the clay tank, so that the clay tower is in a micro positive pressure state, and wet air is prevented from entering.

5. The clay filling quality is important, which not only affects the clay filling bulk density, but also more importantly, if the density is uneven in the filling process, the materials are easy to be short-circuited or the clay layer sinks, so that the phenomena of uneven material and temperature distribution in the clay tank and unequal contact time between the materials and the clay are caused, and the product quality and the clay service life are affected. If the granularity matching of the porcelain balls at the bottom is not proper and the height is not enough, the migration of the clay can be caused, and the clay or clay powder penetrates through the porcelain ball supporting layer, so that the pressure drop of the system is increased. Therefore, the catalyst must be loaded with high importance and loaded in a strictly predetermined size.

6. The operation in the tank needs to be monitored by people, and filling personnel cannot carry objects irrelevant to the work, so that foreign matters, particularly substances harmful to the white soil, are prevented from falling into the white soil layer.

From the above description can learn, all need the manual work to get into in the carclazyte tower through the manhole and operate in filling and the clearance process of carclazyte tower, and the operation requires highly, and the personnel that manual operation got into in the carclazyte tower are limited moreover, and inefficiency, and carry out its healthy of personnel who operate in the carclazyte tower for a long time and probably receive the influence, lack a completion carclazyte tower that can be convenient at present and fill and the device of clearance.

Disclosure of Invention

The invention provides a continuous reforming device for refining dimethylbenzene, which is used for overcoming the defects in the prior art.

The invention is realized by the following technical scheme:

the utility model provides a xylene is refined with continuous reforming unit, includes the carclazyte tower, the carclazyte tower include the tower body, the bottom and the import pipe intercommunication of tower body, the top of import pipe set up fine and close filter screen, the top and the outlet pipe intercommunication of tower body, tower body top set up top manhole, the lower part of tower body set up the side manhole, the tower body in from bottom to top in proper order be first ceramic ball layer, quartz sand layer, white soil layer, second ceramic ball layer, third ceramic ball layer constitute by several cylindric cylinder mould, constitute the cylinder mould of quartz sand layer pack quartz sand, the particle diameter of quartz sand be greater than the aperture of cylinder mould, constitute the cylinder mould of white soil layer pack carclazyte, the particle diameter of carclazyte be greater than the aperture of cylinder mould, the net cage forming the second ceramic ball layer and the third ceramic ball layer is filled with ceramic balls, the grain diameter of the ceramic balls is larger than the grain diameter of the net cage, the center of the top of the net cage is provided with a groove, the bottom of the groove is provided with a screen plate, the grain diameter of the screen plate is smaller than the grain diameter of quartz sand, the grain diameter of the screen plate is smaller than the grain diameter of argil, the grain diameter of the screen plate is smaller than the grain diameter of the ceramic balls, two long groove walls of the groove are respectively provided with a fixed plate, the fixed plates are fixedly connected with the grooves, a hanging ring is arranged between the two fixed plates, two sides of one end of each hanging ring are respectively fixedly connected with one end of a connecting rod, the other end of the connecting rod penetrates through a moving groove arranged on the fixed plate to be connected with a sliding block, the sliding block is cylindrical and is positioned in a sliding groove arranged in the fixed plates, the slider can't pass through the shifting chute, the both sides opening setting of top recess of cylinder mould, the top opening part of cylinder mould set up the separation net of semicircle form, the aperture that separates the net be less than the particle diameter of quartz sand, the aperture that separates the net be less than the particle diameter of carclazyte, the aperture that separates the net be less than the particle diameter of ceramic ball separation net and fixed plate between rotate through the pivot and be connected, the ability that separates the net pass through fixing device fixed connection with the cylinder mould, the top central point of tower body put and set up the groove of passing through, the cylinder mould can pass through the groove of passing through.

The continuous reforming device for refining the xylene comprises a fixing device and a blocking net, wherein the fixing device comprises a plurality of screws arranged in a cylinder mould, through holes are formed in the positions, corresponding to the screws, of the blocking net, the screws can penetrate through the through holes, and the blocking net is fixedly connected with the cylinder mould through the matching of the screws and nuts.

In the continuous reforming device for refining xylene, 1/4' inert ceramic balls are filled in the net cage of the first ceramic ball layer.

In the continuous reforming device for refining xylene, 3/4' inert ceramic balls are filled in the net cage of the second ceramic ball layer.

In the continuous reforming device for refining xylene, 3/4' inert ceramic balls are filled in the net cage of the third ceramic ball layer.

In the continuous reforming apparatus for xylene purification described above, the filter mesh provided at the tip of the inlet pipe has a smaller pore size than the diameter of the ceramic balls.

The continuous reforming device for refining the dimethylbenzene is characterized in that the first quartz sand layer, the second quartz sand layer, the third quartz sand layer and the fourth quartz sand layer are arranged below and above the quartz sand layer in sequence, and the mesh number of the first quartz sand layer, the mesh number of the second quartz sand layer, the mesh number of the third quartz sand layer and the mesh number of the fourth quartz sand layer are reduced from bottom to top in sequence.

The continuous reforming device for refining the dimethylbenzene is characterized in that the mesh number of the quartz sand of the first quartz sand layer is 1-5, the mesh number of the quartz sand of the second quartz sand layer is 5-10, the mesh number of the quartz sand of the third quartz sand layer is 10-20, and the mesh number of the quartz sand of the fourth quartz sand layer is 20-30.

In the continuous reforming apparatus for xylene purification as described above, the height of the mesh cage is 0.5m, and the width of the through groove is 2 m.

According to the continuous reforming device for refining the dimethylbenzene, the sealing rubber ring is arranged on the periphery of the net cage, the outer diameter of the sealing rubber ring is sequentially reduced from top to bottom, the outer diameter of the top of the sealing rubber ring is larger than the inner diameter of the tower body, and the outer diameter of the bottom of the sealing rubber ring is smaller than the inner diameter of the tower body.

The continuous reforming device for refining the dimethylbenzene is characterized in that the top of the mesh cage is provided with the buffer gasket.

The invention has the advantages that: when the clay tower is used, the corresponding material filling is firstly carried out on the net cage outside, the filling can be rapidly completed, the filling stacking density can be ensured, the external filling operation is simple, the probability of mixing sundries in the net cage is extremely low, the operation time is short, the normal operation can be completed in more than one day and is influenced by weather, the device can simultaneously fill a plurality of net cages together, then the net cages are conveyed into the tower body through the tower crane, if the clay tower is operated in sunny days, the filling of the clay tower can be completed in one day, the cleaning is more convenient, only the net cages are taken out one by one through the tower crane to replace the net cage fillers, the operation is simple, and the filling and cleaning efficiency of the clay tower is effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a first configuration of the present invention;

FIG. 2 is a second schematic structural view of the present invention;

FIG. 3 is a schematic view of a first configuration of the netpen of the invention;

fig. 4 is a second structural schematic of the netpen of the invention;

fig. 5 is an enlarged view of a cross-sectional view taken along line a-a of fig. 3.

Reference numerals: 1. a clay tower; 2. a tower body; 3. an inlet pipe; 4. an outlet pipe; 5. a top manhole; 6. a side manhole; 7. a first ceramic ball layer; 8. a quartz sand layer; 8-1, a first quartz sand layer; 8-2, a second quartz sand layer; 8-3, a third quartz sand layer; 8-4, a fourth quartz sand layer; 9. a white soil layer; 10. a second ceramic ball layer; 11. a third ceramic ball layer; 12. a cylinder mould; 13. a groove; 14. a screen plate; 15. a fixing plate; 16. hanging a ring; 17. a connecting rod; 18. a moving groove; 19. a slider; 20. a chute; 21. a barrier net; 22. a rotating shaft; 23. penetrating through the groove; 24. a screw; 25. a through hole; 26. a nut; 27. sealing the rubber ring; 28. a cushion washer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.

The utility model provides a xylene is refined with continuous reforming unit, includes carclazyte tower 1, carclazyte tower 1 include tower body 2, the bottom and the import pipe 3 intercommunication of tower body 2, the top of import pipe 3 set up fine and close filter screen, the top and the outlet pipe 4 intercommunication of tower body 2, 2 tops of tower body set up top manhole 5, the lower part of tower body 2 set up side manhole 6, tower body 2 in from bottom to top in proper order be first ceramic ball layer 7, quartz sand layer 8, white soil layer 9, second ceramic ball layer 10, third ceramic ball layer 11 constitute by the cylindric cylinder mould 12 of several in the cylinder mould 12 of quartz sand layer 8, the particle size of quartz sand be greater than the aperture of cylinder mould 12, constitute the cylinder mould 12 of white soil layer 9 pack argil, the particle size of the argil is larger than the pore size of the mesh cage 12, the mesh cage 12 forming the second ceramic ball layer 10 and the third ceramic ball layer 11 is filled with ceramic balls, the particle size of the ceramic balls is larger than the pore size of the mesh cage 12, the center of the top of the mesh cage 12 is provided with a groove 13, the bottom of the groove 13 is provided with a mesh plate 14, the pore size of the mesh plate 14 is smaller than the particle size of quartz sand, the pore size of the mesh plate 14 is smaller than the particle size of the argil, the pore size of the mesh plate 14 is smaller than the particle size of the ceramic balls, two long groove walls of the groove 13 are respectively provided with a fixed plate 15, the fixed plates 15 are fixedly connected with the groove 13, the middle of the two fixed plates 15 is provided with a hanging ring 16, two sides of one end of the hanging ring 16 are respectively fixedly connected with one end of a connecting rod 17, the other end of the connecting rod 17 passes through a moving groove 18 arranged on the fixed plate 15 to be connected with a sliding block 19, the slider 18 be cylindric, slider 19 be located the spout 20 of setting in fixed plate 15, slider 19 can't pass through shifting chute 18, the both sides opening setting of top recess 13 of cylinder mould 12, the top opening part of cylinder mould 12 set up semicircle-shaped separation net 21, the aperture of separation net 21 be less than the particle diameter of quartz sand, the aperture of separation net 21 be less than the particle diameter of carclazyte, the aperture of separation net 21 be less than the particle diameter of ceramic ball the separation net 21 and fixed plate 15 between rotate through pivot 22 and be connected, the ability of separation net 21 pass through fixing device fixed connection with cylinder mould 12, the top central point of tower body 2 put and set up through groove 23, cylinder mould 12 can pass through groove 23. The invention realizes the convenient filling and cleaning of other layers except the first ceramic ball layer 7 of the clay tower 1, especially the main clay layer 9, when the clay tower is used, the corresponding material filling is firstly carried out on the net cage 12 outside, the filling can be rapidly finished, the filling stacking density can be ensured, the filling operation outside the clay tower 1 is simple, the probability of mixing sundries in the net cage is extremely low, the operation time is short, the normal operation can be finished in more than 10 days, and the influence of weather is required, the device can simultaneously fill a plurality of net cages together, then the clay tower can be fed into the tower body 2 through a tower crane, if the clay tower is operated in sunny days, the filling of the clay tower can be finished in one day, the cleaning is more convenient, only the net cages 12 are taken out one by one tower crane to replace the net cage fillers, the operation is simple, and the filling and cleaning efficiency of the clay tower is effectively improved.

Preferably, the fixing device comprises a plurality of screws 24 arranged in the cylinder mould 12, through holes 25 are formed in the positions, corresponding to the screws 24, of the barrier net 21, the screws 24 can penetrate through the through holes 25, and the barrier net 21 is fixedly connected with the cylinder mould 12 through the cooperation of the screws 24 and nuts 26. The separation net is fixed by matching the screw rod 24 with the nut 26, the operation is simple, the stability is strong, and the use is convenient

Preferably, 3/4' inert ceramic balls are filled in the net cage 12 of the first ceramic ball layer 7.

Preferably, 1/4' inert ceramic balls are filled in the net cage 12 of the second ceramic ball layer 10.

Preferably, 3/4' inert ceramic balls are filled in the net cage 12 of the third ceramic ball layer 11.

In the continuous reforming apparatus for xylene purification as described above, the filter mesh provided at the tip of the inlet pipe 3 has a pore size smaller than the diameter of the ceramic balls.

Preferably, the lower part and the upper part of the quartz sand layer 8 are sequentially provided with a first quartz sand layer 8-1, a second quartz sand layer 8-2, a third quartz sand layer 8-3 and a fourth quartz sand layer 8-4, and the mesh number of the first quartz sand layer 8-1, the second quartz sand layer 8-2, the third quartz sand layer 8-3 and the fourth quartz sand layer 8-4 is sequentially reduced from bottom to top.

Preferably, the mesh number of the quartz sand of the first quartz sand layer 8-1 is 1-5, the mesh number of the quartz sand of the second quartz sand layer 8-2 is 5-10, the mesh number of the quartz sand of the third quartz sand layer 8-3 is 10-20, and the mesh number of the quartz sand of the fourth quartz sand layer 8-4 is 20-30.

Preferably, the height of the netpen 12 is 0.5m, and the width of the through groove 23 is 2 m. The width of the through slot 23 is much greater than the height of the netpen 12, facilitating passage of the netpen 12 through the through slot 23.

Preferably, because there may be the gap between cylinder mould 12 and the tower body 2 inner wall to lead to partial liquid to flow out from the gap between cylinder mould 12 and the tower body 2 inner wall, influence the purity of the xylene that finally obtains, in order to overcome above-mentioned problem, the periphery of cylinder mould 12 set up sealing rubber circle 27, sealing rubber circle 27's external diameter top-down reduce in proper order, sealing rubber circle 27's top external diameter be greater than the internal diameter of tower body 2, sealing rubber circle 27's bottom external diameter be less than in the internal diameter of tower body 2. Through the sealed effect of sealing rubber circle 27 can effectual separation, ensure that liquid all flows out from tower body 2 top behind the cylinder mould 12 in proper order, ensure the purity of xylol.

Preferably, a cushion washer 28 is provided on the top of the netpen 12. The cushion washer 28 can effectively reduce rigid touch between the two netpens 12 when the netpens 12 are lowered, thereby avoiding the phenomenon that the netpens 12 are damaged due to the rigid touch and ensuring the long-term complete and stable use of the netpens 12.

The invention is used for removing the first ceramic ball layer 7 with the bottom which is not replaced frequently and is removed in the invention, the traditional method is adopted for operation, the rest quartz sand layer 8, the white soil layer 9, the second ceramic ball layer 10 and the third ceramic ball layer 11 are all filled into the net cage 12 by filling the corresponding quartz sand, the white soil and the ceramic balls into the net cage 12 at the outside, and the net cages 12 are filled in each layer according to the preset thickness of each layer, the net cage 12 is lifted and sent into the tower body 2 through the through groove 23 by the hanging and matching of the hook of the tower crane and the hanging ring of the net cage 12, the hook 16 is movably arranged to facilitate the lifting and the putting in of the net cage 12, and the blocking net 21 is opened when the filling is finished, the blocking net 21 is fixed through a fixing device after the filling is finished, the filler in the net cage 12 is prevented from falling from the net cage 12 in the moving process, and the top manhole 5, the side manhole 6 and the through groove 23 are sealed by flanges after the filling is finished, so that the normal use of the carclazyte tower 1 is ensured.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (8)

1. A continuous reforming apparatus for xylene purification, characterized in that: comprises a clay tower (1), the clay tower (1) comprises a tower body (2), the bottom of the tower body (2) is communicated with an inlet pipe (3), the top of the tower body (2) is communicated with an outlet pipe (4), the top of the tower body (2) is provided with a top manhole (5), the lower part of the tower body (2) is provided with a side manhole (6), the tower body (2) is internally provided with a first ceramic ball layer (7), a quartz sand layer (8), a white soil layer (9), a second ceramic ball layer (10) and a third ceramic ball layer (11) from bottom to top in sequence, the quartz sand layer (8), the white soil layer (9), the second ceramic ball layer (10) and the third ceramic ball layer (11) are composed of a plurality of cylindrical net cages (12), the net cages (12) of the quartz sand layer (8) are filled with quartz sand, and the particle size of the quartz sand is larger than the pore size of the net cages (12), clay is filled in a net cage (12) forming the white soil layer (9), the particle size of the clay is larger than the pore size of the net cage (12), ceramic balls are filled in the net cage (12) forming the second ceramic ball layer (10) and the third ceramic ball layer (11), the particle size of the ceramic balls is larger than the pore size of the net cage (12), a groove (13) is arranged in the center of the top of the net cage (12), the bottom of the groove (13) is provided with a screen plate (14), the pore size of the screen plate (14) is smaller than that of quartz sand, the pore size of the screen plate (14) is smaller than that of the clay, the pore size of the screen plate (14) is smaller than that of the ceramic balls, two long groove walls of the groove (13) are respectively provided with a fixing plate (15), the fixing plates (15) are fixedly connected with the groove (13), a hanging ring (16) is arranged between the two fixing plates (15), the two sides of one end of the hanging ring (16) are respectively fixedly connected with one end of a connecting rod (17), the other end of the connecting rod (17) penetrates through a moving groove (18) formed in a fixing plate (15) and is connected with a sliding block (19), the sliding block (19) is cylindrical, the sliding block (19) is positioned in a sliding groove (20) formed in the fixing plate (15), the sliding block (19) cannot pass through the moving groove (18), openings on two sides of a top groove (13) of the net cage (12) are formed, a semicircular blocking net (21) is arranged at an opening on the top of the net cage (12), the aperture of the blocking net (21) is smaller than the particle size of quartz sand, the aperture of the blocking net (21) is smaller than the particle size of argil, the aperture of the blocking net (21) is smaller than the particle size of ceramic balls, and the blocking net (21) is rotatably connected with the fixing plate (15) through a rotating shaft (22), the separation net (21) can be fixedly connected with the net cage (12) through a fixing device, a through groove (23) is formed in the center of the top of the tower body (2), and the net cage (12) can pass through the through groove (23);

the fixing device comprises a plurality of screw rods (24) arranged in the net cage (12), through holes (25) are formed in the positions, corresponding to the screw rods (24), of the blocking net (21), the screw rods (24) can penetrate through the through holes (25), and the blocking net (21) is matched with the nut (26) through the screw rods (24) and is fixedly connected with the net cage (12);

the periphery of cylinder mould (12) set up sealing rubber circle (27), the external diameter top-down of sealing rubber circle (27) reduce in proper order, the top external diameter of sealing rubber circle (27) be greater than the internal diameter of tower body (2), the bottom external diameter of sealing rubber circle (27) be less than the internal diameter of tower body (2).

2. The continuous reforming apparatus for xylene purification according to claim 1, wherein: 3/4' inert ceramic balls are filled in the net cage (12) of the first ceramic ball layer (7).

3. The continuous reforming apparatus for xylene purification according to claim 1, wherein: 1/4' inert ceramic balls are filled in the net cage (12) of the second ceramic ball layer (10).

4. The continuous reforming apparatus for xylene purification according to claim 1, wherein: 3/4' inert ceramic balls are filled in the net cage (12) of the third ceramic ball layer (11).

5. The continuous reforming apparatus for xylene purification according to claim 1, wherein: the quartz sand layer (8) is sequentially provided with a first quartz sand layer (8-1), a second quartz sand layer (8-2), a third quartz sand layer (8-3) and a fourth quartz sand layer (8-4) from bottom to top, and the number of the first quartz sand layer (8-1), the second quartz sand layer (8-2), the third quartz sand layer (8-3) and the fourth quartz sand layer (8-4) is sequentially reduced from bottom to top.

6. The continuous reforming apparatus for xylene purification according to claim 5, wherein: the mesh number of the quartz sand of the first quartz sand layer (8-1) is 1-5, the mesh number of the quartz sand of the second quartz sand layer (8-2) is 5-10, the mesh number of the quartz sand of the third quartz sand layer (8-3) is 10-20, and the mesh number of the quartz sand of the fourth quartz sand layer (8-4) is 20-30.

7. The continuous reforming apparatus for xylene purification according to claim 1, wherein: the height of the net cage (12) is 0.5m, and the width of the through groove (23) is 2 m.

8. The continuous reforming apparatus for xylene purification according to claim 1, wherein: the top of the net cage (12) is provided with a buffer gasket (28).

Images