CN206121710U - Spill airflow distribution plate and reactor thereof - Google Patents

Abstract

The utility model provides a spill airflow distribution plate and reactor thereof is improved forming by plate shaped airflow distribution plate, spill airflow distribution plate includes the concave structures who follows its axis downwards concave and advance to and the structure of buckling that bending type becomes under all side direction of spill airflow distribution plate. The concave structures that this concave structures is that cone structure, spherical surface structure or symmetry set up protruding hyperboloid is constituteed in. This airflow distribution plate does benefit to the technology gas of coming in follow reactor bottom and passes through these air current orifice flow plays, it can balanced and abundant contact to make the material of following to get off on reactor upper portion and follow the following technology gas that rises, maintain relatively stable atmospheric pressure, and the air current harmony is compromise simultaneously to the distributing plate, granule product stream mobility and inner structure fatigue durability, combination simple structure, and both the installation and the maintenance are convenient, its supporter atress is more reasonable, high in stability, spatial layout is more safe and scientific, make the operating flexibility of reactor bigger, and can withdraw from reaction heat quicklyer, protection conch wall safety, prolonged service life.

Description

A kind of spill airflow-distribution board and its reactor

Technical field

The application is related to for each in petroleum refining and chemical industry, Coal Chemical Industry, chemical fertilizer industry and other various chemical equipments Plant large-scale high-grade reactor technology field, for example, gas fluidized bed reactor, the hydrogenation reaction reacted by catalyst Device or desulfurization reactor etc., more particularly to a kind of spill airflow-distribution board and its reactor.

Background technology

Chemical reactor, the end socket for including including cylinder, being arranged at cylinder two ends, the material for being arranged at end socket turnover Mouth, the airflow-distribution board being arranged in cylinder and the inner supporting structure for supporting airflow-distribution board, or catalyst in cylinder Supporting structure, have also include pressure vessel inside surfacing applied corrosion resistant lining.

Develop towards the direction of scale recently as petrochemical plant, it is increasing that the volume of reactor becomes, Not only floor space is big, and tall and big device structure brings a series of problem to design, manufacture, transportation, installation, maintenance. Another kind of problem is that course of reaction logistics capacity is big, gas velocity soon and easily causes vibration, difficult in maintenance.

Additionally, the demand with social economy to new grades reactor, using traditional reactor technique need can not have been met Ask.New technology is simple, operating condition is gentle, simplifies operation, therefore, yield is high, and raw material, energy expenditure are than low, fluidisation Bed reactor then represents one of development trend of state-of-the-art technology, the technique that it is critical only that inside reactor of its structure and technology Edema caused by disorder of QI fabric swatch.

In fluid bed production technology, gas distribution grid is to ensure gas-solid fluidized bed with good and stable fluidized state Important component, directly affect the endocorpuscular flow pattern of fluid bed and fluidization uniformity, be that fluidized bed reactor designs are musted The critical component that need to be considered.Gas distribution grid determines the generation frequency of bubble and the original state of gas-solid contact, internals Then directly affect whole fluidised form.

In prior art, the gas-solid fluidized bed distribution grid of inside reactor is to justify flat structure, circular platform type distribution grid With the structure such as funnelform turbination, more or less exist that anti-deposit is indifferent, stability is not high, easily by active substance The defects such as blocking, there is also original distributing plate structure the problems such as the function adaptability after reactor shell structure large-scale. Wherein the instability problem of fluidizing gas bed can be divided into the big class of primary unstability and secondary unstability etc. two.

Distribution grid is to justify flat structure and deposit subject matter both ways to be：One is that production capacity is restricted, be same Design two kinds of through holes on block flat board, the air-flow under flat board through through hole toward it is stable upper while, allow washer Through through hole swimmingly toward dirty, with the lifting of production capacity, can at random there is obstruction to granule product in the two passes of raising and lowering； Two be justify flat board lateral forces it is poor compared with cylinder, be easily deformed, structure and air-flow deviate original design.But plate distribution Plate is widely used due to its simple structure, easily manufactured.But the structure has one in fluid-bed granulation Fixed defect, on the basis of plate distribution grid deficiency is analyzed, circular platform type distribution grid and funnel conical structure are changed Enter.The outlet that product particle collects from funnel central bottom is sent, process gas air-flow then by being circumferentially open on distribution grid Flow out in hole.

Distribution grid is that funnelform turbination structure has three aspect subject matters：

One is the three-dimensional non-equilibrium of process gas fluid bed, and process gas form spiralling gas in distribution grid funnel Stream, eddy flow causes circumferential fluidised form and axial fluidised form all unbalanced in ascending motion because of energy dissipation so that from top to down Material progressively generates in the reaction granule, and the peritropous shell wall of thick particle stream, easily causes under the centrifugal action of eddy flow Radial direction fluidised form is unbalanced.Second, it is that the stream pressure regulation and control at distribution grid upper shed are difficult, this is due to funnelform inverted cone Shape structure causes distribution grid space below gradually to expand during rising, and the process gas below distribution grid are in rising During, gradually decrease the process gas total amount below distribution grid because part is flowed out from radial opening, so as to air pressure is obvious Reduce.3rd, it is that distribution grid funnel gos deep in low head being formed the nested relationship for overlapping, the process gas come in from end socket are because of space Strong erosion funnel bottom is limited, causes the strong variations of air flow press molding and the vibration of funnel, the structure pine that vibrating fatigue causes Dynamic or cracking produces some additional process gas runners again, upsets original design of Fluidized bed, follows into structure and technique are pernicious Ring.Additionally, also there are the other problemses that some are not easy to mounting and adjusting in original distribution grid.

The reason for analysis the problems referred to above, be that infundibulate is mainly highlighted in distributing plate structure design for collection product particle Function, and despised its impact to air-flow, have ignored the effect of process from the visual angle for emphasizing result.There is analysis to refer to Go out, due to being affected by wall effect, its fluidal texture has bigger difference to two dimensional fluidized bed with three-dimensional fluidized bed, and gas eddy is only Can develop in two-dimensional space, be easier the flat gas eddy of large scale occur in bed.Therefore, section is easily formed in two-dimensional bed to gush etc. no Stabilization fluid situation, and the overall circulation of similar three-dimensional bed can not be formed.Also have after comprehensive study analysis and point out, strengthen distribution The gas speed of plate central area is crucial.

In addition to distributing plate structure, the pore on distribution grid is also the key for affecting fluidized bed state.In each uneven cloth hole In fluid bed, big aperture is intervally arranged, and the interior gas eddy for producing of air distribution plate fluid bed is relatively small and dispersibility is preferable, gas phase velocity Vector distribution is relatively decentralized homogeneous, and fluid effect is best.

Therefore, for the problems referred to above defect, a kind of airflow-distribution board is researched and developed, process gas can be made in barrel type reactor Equiblibrium mass distribution is flowed up, while the grain products for making generation are collected from bottom discharge by distribution grid, moreover it is possible to resist logistics capacity Greatly, the vibrating fatigue that gas velocity causes soon, the anti-deposit distribution grid good by pressure drop stability and fluidization quality is met, application In petrochemical industry reactor, there is important engineering significance to steady production and economic benefit.

Utility model content

One of purpose of the application is to avoid weak point of the prior art and provide a kind of spill airflow-distribution board, Flow up can process gas equiblibrium mass distribution in reactor, while the material particles product for making generation passes through the spill air-flow Distribution grid collects from bottom discharges, moreover it is possible to resist the vibrating fatigue that logistics capacity is big, gas velocity fast and causes, and it is that to meet pressure drop steady The good anti-deposit distribution grid of qualitative and fluidization quality.

The two of the purpose of the application are to avoid weak point of the prior art and provide a kind of with above-mentioned spill gas The reactor of flow point fabric swatch, it can simultaneously have good air-flow harmony, grain products good fluidity and internal structure endurance concurrently Property is good.

One of purpose of the application is achieved through the following technical solutions：

There is provided a kind of spill airflow-distribution board, improved by plate shaped airflow-distribution board and formed, wherein, the spill air-flow Distribution grid is included along the axis of spill airflow-distribution board concave structure recessed down, and the spill air flow method The bending structure that the week side of boss of plate is bent to form downwards.

Wherein, the concave structure is rounding wimble structure.

Wherein, the concave structure is spherical structure.

Wherein, the concave structure is the concave structure of symmetrically arranged convex hyperboloid composition.

Wherein, the concave structure of spill airflow-distribution board height recessed down is more than the spill airflow-distribution board Bending structure bending downwards height.

Wherein, the bottom between the bending structure and cylinder inboard wall offers material guide hole.

Wherein, the concave structure is integrally formed setting or by several arc sheet splicing connect settings, the bending Structural integrity molding is arranged or by several arc sheet splicing connect settings.

Wherein, the concave structure is provided with the airflow hole circumferentially arranged, and the bending structure is provided with radially to be arranged The airflow hole of cloth.

Wherein, the interlaced setting of airflow hole on the bending structure and the concave structure opposed area.

The two of the purpose of the application are achieved through the following technical solutions：

Additionally provide a kind of reactor, including cylinder, be arranged at the end socket at cylinder two ends, be arranged at the material turnover of end socket Mouth, the airflow-distribution board being arranged in cylinder and the inner supporting structure for supporting airflow-distribution board, wherein, the air flow method Plate is a kind of spill airflow-distribution board described above, and the inner supporting structure includes the supporting of the inwall for being arranged at the cylinder Ring, the distribution of air flow pipe being arranged at below a kind of spill airflow-distribution board, process gas set along the horizontal tangential of the cylinder The process gas import put enters the distribution of air flow pipe, then is risen and be somebody's turn to do by a kind of airflow hole of spill airflow-distribution board The material that reactor top is got off is fully contacted.

The beneficial effect of the application：A kind of spill airflow-distribution board of the application and its reactor, by plate shaped air-flow point Fabric swatch improves to be formed, wherein, the spill airflow-distribution board includes recessed down along the axis of the spill airflow-distribution board Concave structure, and the bending structure that the week side of boss of the spill airflow-distribution board is bent to form downwards.Be conducive to from reactor The process gas that bottom is come in are flowed out by these airflow holes, make the material got off from reactor top and the technique risen from below Gas forms equilibrium and is fully contacted, and maintains metastable air pressure, spill airflow-distribution board to take into account air-flow harmony, granule simultaneously Product mobility and internal structure fatigue durability, with anti-deposit ability is strong, goods fluid fully, substantially without dead band, production The advantages of stable, flexible operation and long the production cycle, and combinative structure is simple, installs and easy to maintenance, its supporting member stress is more Rationally, stability is high, and space layout is more safe and scientific, and the operating flexibility of reactor is bigger, product particle size and into graded Matter is uniform, and can more promptly withdraw from reaction heat, protects shell wall safety, increases the service life.

Description of the drawings

The application is described further using accompanying drawing, but the embodiment in accompanying drawing does not constitute any limit to the application System, for one of ordinary skill in the art, on the premise of not paying creative work, can be being obtained according to the following drawings Other accompanying drawings.

Fig. 1 is a kind of one of which structural representation of spill airflow-distribution board of the application.

Fig. 2 is the structural representation at another visual angle of Fig. 1.

Fig. 3 is a kind of one of which structural representation of spill airflow-distribution board of the application.

Fig. 4 is a kind of one of which structural representation of spill airflow-distribution board of the application.

Fig. 5 is a kind of one of which structural representation of spill airflow-distribution board of the application.

Fig. 6 is a kind of one of which structural representation of reactor of the application.

Include in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6：

Cylinder 1, upper cover 2, spherical low head 3, upper shed 4, under shed 5, bearing 6, support ring 7, process gas import 8, Distribution of air flow pipe 9, spill airflow-distribution board 10, concave structure 11, bending structure 12, material guide hole 13, airflow hole 14, arc sheet connects Seam 15, spherical structure 16, the concave structure 17 of convex hyperboloid composition, oval low head 18, conical low head 19.

Specific embodiment

The application is described in further detail with the following Examples.

Embodiment 1

A kind of one of specific embodiment of spill airflow-distribution board of the application, with reference to shown in Fig. 1 and Fig. 2, it is by putting down Plate shape airflow-distribution board improves to be formed, and the innovation of the application is that the spill airflow-distribution board 10 is included along described recessed The axis of shape airflow-distribution board 10 concave structure 11 recessed down, and the week side of boss of the spill airflow-distribution board 10 is downward The bending structure 12 being bent to form.

Specifically, the concave structure 11 is rounding wimble structure.The spill airflow-distribution board 10 is by the spill positioned at middle part The airflow-distribution board of structure and the similar M shapes of the composition of bending structure 12 positioned at the week side of boss, research shows that similar M shape structures have Radial elastic, is adapted to the deformation displacement of reactor without being twisted deformation, therefore its periphery can be with reactor wall It is fixedly connected, is easy to sealing；The combinative structure of the M shape structures, by changing gas distribution grid shape gas distribution mode is improved, if Inner circle-outer shroud two-way various inlet mode of the same area is counted, simple big conical structure has been compared, whole height can have been downgraded, Both self-stability had been made it have, can have also expanded reaction zone space.

Specifically, the concave structure 11 of the spill airflow-distribution board 10 height recessed down is more than the spill air-flow The height of the bending structure 12 of distribution grid 10 bending downwards.

Specifically, the bottom between the bending structure 12 and the inwall of reactor shell offers material guide hole 13.Its work Be guiding granule under slip-stream go out from the mouthpiece of end socket bottom to reactor lower part.

Specifically, the concave structure 11 is integrally formed setting or by several arc sheet splicing connect settings, described Bending structure 12 is integrally formed setting or by several arc sheet splicing connect settings.Arc sheet seam 15 between arc sheet is It is seamlessly connected.Arc sheet facilitates grain products to flow to bottom under Gravitative Loads, also allows for grain products and gas distribution, specifically During installation, the arc sheet of fritter is fastened by bolts on beneath supporting structure.For ease of processing, according to the life for manufacturing factory Equipment capability is produced, spill airflow-distribution board 10 not only can be divided into several Circular Plates in radial direction, and each piece of Circular Plate is again Several arc sheets can be circumferentially divided into, flexibly arranged, ease of assembly and transport.

Separately, the part arc piece on the spill airflow-distribution board 10 can be with the stream of on-line tuning process gas by changing inclination angle State.Simultaneously the thickness of the arc piece on the spill airflow-distribution board 10 can have different excellent according to the place radial position of arc piece Change.The weight effect of the arc piece in the middle of reactor is born near the flanging arc piece of reactor shell wall, more product weights are also subjected to Amount is acted on, and needs higher thickness.

Specifically, the concave structure 11 is provided with the airflow hole 14 circumferentially arranged, and the bending structure 12 is provided with The airflow hole 14 radially arranged.Airflow hole 14 can be using cut or punching press pore-forming.From the technique that reactor bottom is come in Gas is flowed out by these airflow holes 14, make the material got off from reactor top and the process gas risen from below formed it is balanced and The fluid bed being fully contacted.

Separately, radial opening can include positive radial opening and negative radial opening, horizontal radial opening, updip radial opening and Have a down dip radial opening, or the combination of these openings.Circumferential openings are included along circumferential openings and inverse circumferential openings, the side of mutual cross-flow To the fraction active force that can cancel out each other in operation, the probability of vibration is substantially reduced.

Separately, on the arc piece of the spill airflow-distribution board 10 radial direction arrangement arrange airflow hole 14 opening size according to The place radial position of arc piece has different optimizations.Near the air pressure and close reactor in the radial air flow hole 14 of the shell wall of reactor The air pressure in middle radial direction pore hole slightly has difference, needs to adjust its air pressure and flow velocity by the size of opening size, makes point Fluid bed operating mode more than fabric swatch is balanced.

Separately, on the arc piece of the spill airflow-distribution board 10 radial direction arrangement arrange airflow hole 14 opening shape according to The place radial position of arc piece has different optimizations.Balanced also for the fluid bed operating mode for making more than distribution grid, opening shape can To be falcate, tongue shape, crack, circle, oblateness, triangle, strip, rectangle, also including the combination that these are open, etc. Deng.

Specifically, airflow hole 14 on the bending structure 12 and the opposed area of the concave structure 11 is interlaced to be set Put.Research shows that the vibration of spill distribution grid is relevant with the effect counter-force of air-flow.Due to being similar to the airflow-distribution board of M shapes by V Shape is constituted, and the airflow hole 14 in the arc plate face of inverted V-shaped both sides is if the direction of convection current of radially mutually staggering, process gas and thing Material makes material be fully contacted in constantly rolling under the dynamic action of thread mixing, meanwhile, can be mutual in operation Fraction active force is offset, the probability of structural vibration is substantially reduced.

Embodiment 2

The two of the specific embodiment of a kind of spill airflow-distribution board of the application, the main technical schemes of the present embodiment with Embodiment 1 is identical, in the present embodiment unaccounted feature, and using the explanation in embodiment 1, here is no longer repeated.Ginseng Examine shown in Fig. 3, the present embodiment is with the difference of embodiment 1, wherein, the concave structure 11 is spherical structure 16.Can make Process gas equiblibrium mass distribution in reactor is flowed up, while the material particles product for making generation passes through the spill airflow-distribution board Collect from bottom and discharge, moreover it is possible to resist the vibrating fatigue that logistics capacity is big, gas velocity fast and causes, its be meet pressure drop stability and The good anti-deposit distribution grid of fluidization quality.

Embodiment 3

The three of the specific embodiment of a kind of spill airflow-distribution board of the application, the main technical schemes of the present embodiment with Embodiment 1 is identical, in the present embodiment unaccounted feature, and using the explanation in embodiment 1, here is no longer repeated.Ginseng Examine shown in Fig. 4, the present embodiment is with the difference of embodiment 1, wherein, the concave structure 11 is symmetrically arranged convex hyperbolic The concave structure 17 of face composition.Flow up can process gas equiblibrium mass distribution in reactor, while making the material of generation Granule product is collected from bottom by the spill airflow-distribution board discharges, moreover it is possible to which that what is resisted that logistics capacity is big, gas velocity fast and cause shakes Dynamic fatigue, it is to meet the good anti-deposit distribution grid of pressure drop stability and fluidization quality.

Embodiment 4

A kind of one of specific embodiment of reactor of the application, with reference to shown in Fig. 6, including cylinder 1, is arranged at cylinder The upper cover 2 and spherical low head 3 at 1 two ends, it is arranged at the upper shed 4 of upper cover 2, is arranged at the under shed of spherical low head 3 5, upper shed 4 is material inlet, and under shed 5 is material outlet, the airflow-distribution board being arranged in cylinder 1 and for supporting air-flow The inner supporting structure of distribution grid, above-mentioned technical pattern feature is essentially identical with the structure of reactor of the prior art, and this Shen A kind of reactor please also possesses other basic structures of reactor of the prior art.

The innovation of the application is that the airflow-distribution board is a kind of spill air-flow point described in above-described embodiment 1 Fabric swatch 10, the inner supporting structure includes the support ring 7 of the inwall for being arranged at the cylinder, is arranged at a kind of spill air-flow The distribution of air flow pipe 9 of the lower section of distribution grid 10, process gas enter institute along the process gas import 8 that the horizontal tangential of the cylinder 1 is arranged Distribution of air flow pipe 9 is stated, then rises to get off with the reactor top by a kind of airflow hole 14 of spill airflow-distribution board 10 Material be fully contacted.The process gas come in from reactor bottom are entered after low head, still along distribution of air flow pipe 9 near recessed The bottom of shape airflow-distribution board 10 carries out relatively reasonable distribution, will not occur directly to wash away with the component in end socket.

Separately, the supporting structure of the airflow-distribution board can be with integrated setting with the distribution of air flow pipe 9 of bottom process gas.Root According to specific design, the distribution of air flow pipe 9 of grid frame supported or support shape can be specially set, two kinds of functions of a part, both Play the role of to support airflow-distribution board, also play the role of to distribute process gas, the process gas come in from reactor bottom enter lower envelope After head, relatively reasonable distribution is carried out near the bottom of spill distribution grid still along pipe network.To keep stable air pressure to provide Structure guarantee.

The building course of above-mentioned spill airflow-distribution board 10：(1) by the structural parameters and product particle size of reactor, The inclination angle of Preliminary design spill airflow-distribution board 10 and other size of main body, and according at the beginning of the size of spill airflow-distribution board 10 Step design supporting structure size；(2) process gas flow and its elastic range are determined according to the technological parameter and production capacity of reactor, is entered One step estimates distribution of the process gas flow along spill airflow-distribution board 10；(3) airflow hole on spill airflow-distribution board 10 is designed 14, carry out the numerical simulation analysis of fluidised form, and adjusting and optimizing structure；(4) size and number of material guide hole 13 is designed, if necessary One section of adapter can be welded in groups of openings, product particle is directed to outlet；(5) set according to the structure of spill airflow-distribution board 10 for determining Count its grid frame supported or itself and the distribution of air flow pipe 9 of bottom process gas unite two into one to form support shape distribution of air flow pipe 9；(6) The arc piece of punching press spill airflow-distribution board 10, pre-assembled detection its overall package detects the tightness of arc piece seam 15；(7) group Weld each component, it is to avoid excessive welding residual stress；(8) packaging is provided and description is transported, in prevention transhipment distribution grid is caused Loosen or deform；(11) instruction for mounting is provided, reactor feeds intake before running and pulls down for the erection bolt of packaging.

Separately, support ring 7 can be the domain, or segmentation, but the end of section and section not retention gap, typically Can be welded on the inwall of the cylinder of reactor；Spill airflow-distribution board 10 can be fastened and is placed in the support ring 7.

Separately, when reactor diameter is larger, the spherical low head 3 or oval low head 18 positioned at cylinder bottom can be adopted With conical low head 19（With reference to shown in Fig. 5）Structure, functionally, compared to the former, be conducive to product particle in spill The lower section aggregation of airflow-distribution board 10, is conducive to Simplified flowsheet technology in device fabrication.

Embodiment 5

The two of the specific embodiment of a kind of reactor of the application, the main technical schemes and embodiment 4 of the present embodiment It is identical, unaccounted feature in the present embodiment, using the explanation in embodiment 4, here is no longer repeated.The present embodiment with The difference of embodiment 4 is that the airflow-distribution board is a kind of spill airflow-distribution board 10 described in above-described embodiment 2.

Embodiment 6

The three of the specific embodiment of a kind of reactor of the application, the main technical schemes and embodiment 4 of the present embodiment It is identical, unaccounted feature in the present embodiment, using the explanation in embodiment 4, here is no longer repeated.The present embodiment with The difference of embodiment 4 is that the airflow-distribution board is a kind of spill airflow-distribution board 10 described in above-described embodiment 3.

Finally it should be noted that above example is only illustrating the technical scheme of the application, rather than the application is protected The restriction of shield scope, although having made to explain to the application with reference to preferred embodiment, one of ordinary skill in the art should Work as understanding, the technical scheme of the application can be modified or equivalent, without deviating from the reality of technical scheme Matter and scope.

Claims (10)

1. a kind of spill airflow-distribution board, is improved by plate shaped airflow-distribution board and is formed, it is characterised in that：The spill air-flow point Fabric swatch is included along the axis of spill airflow-distribution board concave structure recessed down, and the spill airflow-distribution board The bending structure that is bent to form downwards of the week side of boss.

2. a kind of spill airflow-distribution board according to claim 1, it is characterised in that：The concave structure is inverted cone knot Structure.

3. a kind of spill airflow-distribution board according to claim 1, it is characterised in that：The concave structure is sphere knot Structure.

4. a kind of spill airflow-distribution board according to claim 1, it is characterised in that：The concave structure is to be symmetrical arranged Convex hyperboloid composition concave structure.

5. a kind of spill airflow-distribution board according to any one of claim 1 to 4, it is characterised in that：The spill gas The height that the concave structure of flow point fabric swatch is recessed down is more than the height that the bending structure of the spill airflow-distribution board bends downwards Degree.

6. a kind of spill airflow-distribution board according to any one of claim 1 to 4, it is characterised in that：The bending knot Bottom between structure and cylinder inboard wall offers material guide hole.

7. a kind of spill airflow-distribution board according to any one of claim 1 to 4, it is characterised in that：The spill knot Structure is integrally formed setting or by several arc sheets splicing connect setting, if the bending structure be integrally formed setting or by Dry arc sheet splicing connect setting.

8. a kind of spill airflow-distribution board according to claim 7, it is characterised in that：The concave structure was provided with along week To the airflow hole of arrangement, the bending structure is provided with the airflow hole radially arranged.

9. a kind of spill airflow-distribution board according to claim 8, it is characterised in that：The bending structure and the spill The interlaced setting of airflow hole in structure opposed area.

10. a kind of reactor, including cylinder, the end socket for being arranged at cylinder two ends, the material import and export for being arranged at end socket, are arranged at Airflow-distribution board in cylinder and the inner supporting structure for supporting airflow-distribution board, it is characterised in that：The airflow-distribution board A kind of spill airflow-distribution board any one of the claims 1 to 9, the inner supporting structure includes being arranged at institute The support ring for stating the inwall of cylinder, the distribution of air flow pipe being arranged at below a kind of spill airflow-distribution board, process gas are along institute The process gas import for stating the horizontal tangential setting of cylinder enters the distribution of air flow pipe, then by a kind of spill air flow method The airflow hole of plate rises the material got off with the reactor top and is fully contacted.