CN206887017U - Type ball pyrolysis oven - Google Patents

Abstract

The utility model discloses type ball pyrolysis oven.The type ball pyrolysis oven includes body of heater and radiant tube heater.The radiant tube heater includes：N radiant tube, each radiant tube are respectively provided with first port and second port, wherein, n >=2；Two burner assemblies, each burner assembly includes burner and (n 1) individual flow distribution plate, inlet channel is provided with each burner, (n 1) individual flow distribution plate is spaced to turn up the soil and is located in corresponding inlet channel and limits n separate subchannels jointly with the side wall of inlet channel, the inlet end of n subchannel limits the air inlet of inlet channel jointly, the first port of n radiant tube corresponds with n subchannel of one of burner assembly and connects setting, the second port of n radiant tube corresponds with n subchannel of another burner assembly and connects setting.According to type ball pyrolysis oven of the present utility model, reduce operating point and trouble point, radiant tube heater operation is more stable.

Description

Type ball pyrolysis oven

Technical field

Pyrolytic technique field is the utility model is related to, more particularly, to a kind of type ball pyrolysis oven.

Background technology

Heat accumulation type radiant tube heater is that advanced HTAC is applied on gas fired radiant tubes, burning production Thing does not contact with heating object, and by the setting of heat storage using the sensible heat of combustion inner pipe flue gas come warm-up combustion-supporting air or Combustion gas, it is many to have that combustion thermal efficiency is high, heating efficiency is strong, tube wall surface hot-fluid is uniform, stable, equipment dependability is high etc. Feature, various heat-treatment furnaces have been widely used in it.

The heat accumulation type radiant tube heater of type ball pyrolysis oven in correlation technique typically has a radiant tube, two accumulation of heats Formula burner, two small burners, two reversal valves, two regulating valves and other connected structures.When multiple heat accumulation type radiant tubes add Hot device is applied when on type ball pyrolysis oven, because the accessory kit of every set heat accumulation type radiant tube heater is too many, the space of occupancy Greatly, operating point is more, and trouble point is more, and mouth preceding pipeline is complicated, brings inconvenience to maintenance and operation, and limited by burner volume System, the clear spacing of the radiant tube of adjacent two heat accumulation type radiant tube heaters are larger.

Utility model content

The utility model is intended to one of technical problem at least solving in correlation technique to a certain extent.Therefore, this reality With a kind of type ball pyrolysis oven of new proposition, operating point is few, and trouble point is few, convenient maintenance and operation.

Formed according to the type ball pyrolysis oven of the utility model embodiment, including body of heater and radiant tube heater, the body of heater For annular shape, the radiant tube heater is located in the side wall of the body of heater, and the radiant tube heater includes n radiation Pipe, the n radiant tubes are intervally arranged into substantial arc shape in the circumferential direction of the body of heater, and each radiant tube is equal With first port and second port, wherein, n >=2；Two burner assemblies, each burner assembly include burner and (n-1) Individual flow distribution plate, each burner is interior to be provided with inlet channel, and (n-1) the individual flow distribution plate, which is spaced to turn up the soil, is located at corresponding institute State in inlet channel and limit n separate subchannels, the n subchannels jointly with the side wall of the inlet channel Inlet end limit the air inlet of the inlet channel jointly, the first port of the n radiant tubes with described in one of them The n of the burner assembly subchannels are corresponded and connection is set, the second port of the n radiant tubes with described in another The n subchannels of burner assembly correspond and connection is set.

According to the type ball pyrolysis oven of the utility model embodiment, by setting above-mentioned radiant tube heater, i.e., by setting N radiant tube and two burner assemblies are put, and each burner assembly is included burner and (n-1) individual flow distribution plate and in each burner Interior setting inlet channel, (n-1) individual flow distribution plate is spaced turn up the soil be located in corresponding inlet channel and with inlet channel Side wall limits n separate subchannels jointly, makes the first port of n radiant tube and the n of one of burner assembly Individual subchannel is corresponded and connection is set, and makes the second port of n radiant tube and the n subchannel one of another burner assembly One corresponding and connection setting, so that n radiant tube is corresponding with two burner assemblies and n radiant tube is connected into two burners Between component, thus, a radiant tube heater in the present embodiment can be equivalent to the n radiant tube heating in correlation technique Device, so as to reduce the quantity of the accessory kits such as burner, reversal valve, regulating valve, occupy little space, reduce operating point and failure Point, radiant tube heater operation is more stable, simplifies mouth preceding pipeline, so as to facilitate maintenance and operation, and each radiant tube Clear spacing between the adjacent radiant tube of heater can not be limited by burner volume；In addition, when radiant tube heater should When in the body of heater for being shaped as annular, be advantageous to radiant tube heater and of the circumferential direction of the body of heater of type ball pyrolysis oven Match somebody with somebody, consequently facilitating placing more radiant tube heaters in the body of heater of type ball pyrolysis oven.

According to some embodiments of the utility model, the area of passage of the inlet end of each subchannel is identical.

Alternatively, the flow distribution plate is steel part.

Alternatively, the thickness of the flow distribution plate is 2~6mm.

Alternatively, the radiant tube is U-tube or W type pipes.

Alternatively, the first port of each radiant tube and the line direction of second port and the axial direction side of the burner Angle between is α, and α meets：0 ° of 90 ° of ＜ α ＜.

According to some embodiments of the utility model, radiant tube heater also includes two inlet tubes, two imports Pipe is corresponded with two burner assemblies and set, and each inlet tube is connected with the air inlet of the inlet channel.

Alternatively, the radiant tube heater be located at interior ring-side wall and the outer shroud side wall of the body of heater it is at least one on.

Alternatively, multiple radiant tube heaters are respectively equipped with the interior ring-side wall and the outer shroud side wall, be located at Multiple radiant tube heaters on the interior ring-side wall the interior ring-side wall circumferentially-spaced arrangement, positioned at described outer The circumferentially-spaced arrangement of multiple radiant tube heaters on ring-side wall in the outer shroud side wall.

Brief description of the drawings

Fig. 1 is the schematic diagram according to the radiant tube heater of the utility model some embodiments；

Fig. 2 is the schematic diagram according to the other direction of the radiant tube heater of the utility model some embodiments；

Fig. 3 is the schematic diagram according to the another direction of the radiant tube heater of the utility model some embodiments；

Fig. 4 is the fragmentary sectional view according to the radiant tube heater of the utility model some embodiments；

Fig. 5 is the sectional view at the burner according to Fig. 4.

Fig. 6 is the fragmentary sectional view according to the type ball pyrolysis oven of the utility model some embodiments；

Fig. 7 is the cut-away view according to the body of heater of the utility model some embodiments；

Fig. 8 is the connection diagram of the radiant tube and burner assembly according to the utility model some embodiments；

Fig. 9 is the connection diagram of the radiant tube and burner assembly according to the utility model other embodiments.

Reference：

Type ball pyrolysis oven 1000；

Radiant tube heater 100；

Radiant tube 1；First port 11；Second port 12；

Burner assembly 2；Burner 21；Inlet channel 211；Air inlet 2112；Subchannel 2111；Flow distribution plate 2222；

Inlet tube 3；

Body of heater 200；Interior ring-side wall 201；Outer shroud side wall 202.

Embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings.Below by The embodiment being described with reference to the drawings is exemplary, it is intended to for explaining the utility model, and it is not intended that new to this practicality The limitation of type.

In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " axle To ", " radial direction ", the orientation of the instruction such as " circumference " or position relationship be based on orientation shown in the drawings or position relationship, be only for Be easy to describe the utility model and simplify to describe, rather than instruction or imply signified device or element must have it is specific Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.

In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include at least one this feature.In description of the present utility model, " multiple " are meant that at least two, such as two It is individual, three etc., unless otherwise specifically defined.

In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be Mechanically connect or electrically connect or can communicate each other；Can be joined directly together, the indirect phase of intermediary can also be passed through Even, can be two element internals connection or two elements interaction relationship, limited unless otherwise clear and definite.For this For the those of ordinary skill in field, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.

Type ball pyrolysis oven 1000 below with reference to Fig. 1-Fig. 9 descriptions according to the utility model embodiment.

As shown in fig. 6, according to the type ball pyrolysis oven 1000 of the utility model embodiment, including the He of radiant tube heater 100 Body of heater 200, wherein, radiant tube heater 100 is located in the side wall of body of heater 200.

As shown in Fig. 1-Fig. 3 and Fig. 8-Fig. 9, according to the radiant tube heater 100 of the utility model embodiment, it can wrap Include：N radiant tube 1 and two burner assemblies 2.

N radiant tube 1 is intervally arranged, wherein, n >=2, that is to say, that radiant tube heater 100 include two or two with On radiant tube 1, such as shown in Fig. 2 radiant tube heater 100 includes four radiant tubes 1 being intervally arranged.

Alternatively, radiant tube 1 is U-tube or W type pipes.Certainly, the utility model not limited to this, in other embodiments In, radiant tube 1 can also be I-tube.For example, each radiant tube 1 be U-tube, each U-shaped radiant tube 1 is towards same direction Plane spaced-apart where opening and each U-shaped radiant tube 1 is set.

Body of heater 200 can be annular shape, and n radiant tube 1 is arranged into substantial arc shape in the circumferential direction of body of heater 200 Shape.For example, as shown in Fig. 24 radiant tubes 1 are intervally arranged into substantially circle-arc profile in the circumferential direction of body of heater 200.By This, it is simple in construction, and be advantageous to radiant tube heater 100 and of the circumferential direction of the body of heater 200 of type ball pyrolysis oven 1000 Match somebody with somebody, consequently facilitating placing more radiant tube heaters 100 in type ball pyrolysis oven 1000, improve heating effect.Preferably, stove Body 200 is formed as annular shape.Certainly, in other optional embodiments, the annular shape in the side of may be formed as of body of heater 200 Shape.

Specifically, each radiant tube 1 is respectively provided with first port 11 and second port 12.For example, when radiant tube 1 is U-tube When, first port 11 and second port 12 are respectively adjacent to the unlimited place of the U-shaped shape.Or when radiant tube 1 is I-tube, the Single port 11 and second port 12 are located at the axial both ends of the radiant tube 1 respectively.

As shown in Figure 4 and Figure 5, each burner assembly 2 includes burner 21 and (n-1) individual flow distribution plate 22, in each burner 21 Provided with inlet channel 211, (n-1) individual flow distribution plate 22 is spaced to turn up the soil and is located in corresponding inlet channel 211 and leads to air inlet The side wall in road 211 limits n separate subchannels 2111 jointly, and the inlet end of n subchannel 2111 limits jointly The air inlet 2112 of inlet channel 211.

The n subchannel 2111 of the first port 11 of n radiant tube 1 and one of burner assembly 2 is corresponded and connected Logical to set, the second port 12 of n radiant tube 1 is corresponded and connected with the n subchannel 2111 of another burner assembly 2 and sets Put, thus, the first port 11 and second port 12 of each radiant tube 1 subchannel 2111 with corresponding two burners 21 respectively Connection.

It is understood that the inlet end of subchannel 2111 refers to one end of the remote radiant tube 1 of each subchannel 2111.

Specifically, when radiant tube heater 100 is applied in type ball pyrolysis oven 1000, air fuel can be from it In the air inlet 2112 of a burner assembly 2 enter in burner 21 and burnt in burner 21, the heat-carrying waste gas after burning can Each subchannel 2111 is had respectively entered, then into each radiant tube 1 corresponding with each subchannel 2111, body of heater 200 Interior material such as type ball can directly under fall on the upper surface of radiant tube 1 or touch and wash away radiant tube 1 and be heated to reaction temperature Degree, the reacted waste gas in subsequent multiple radiant tubes 1 can correspond to by another burner 21 multiple subchannels 2111 and from The air inlet 2112 of another burner 21 is discharged in external environment.Wherein it is understood that falling material is in freedom Can contact, can not also be contacted with the inwall of body of heater 200 of radiant tube 1 or type ball pyrolysis oven 1000 in dropping process, when material not Mainly conducted heat when being contacted with type ball pyrolysis oven 1000 or radiant tube 1 by heat radiation, when falling material touch the inwall of body of heater 200 or By heat transfer by heat conduction during radiant tube 1.

It will be appreciated by persons skilled in the art that radiant tube heater 100 also includes air four-way reversing valve, coal gas four The structures such as logical reversal valve, manual modulation valve and expander, on the other structures and operation principle of radiant tube heater 100, By as it is known to those skilled in the art that no longer describe in detail herein.

According to the type ball pyrolysis oven 1000 of the utility model embodiment, by setting above-mentioned radiant tube heater 100 i.e. By setting n radiant tube 1 and two burner assemblies 2, and each burner assembly 2 is set to include burner 21 and (n-1) individual flow distribution plate 22 and inlet channel 211 is set in each burner 21, (n-1) individual flow distribution plate 22 is spaced to turn up the soil is located at corresponding air inlet N separate subchannels 2111 are limited jointly in passage 211 and with the side wall of inlet channel 211, make n radiant tube 1 First port 11 corresponded with the n subchannel 2111 of one of burner assembly 2 and connect setting, make n radiant tube 1 Second port 12 corresponded with the n subchannel 2111 of another burner assembly 2 and connect setting so that n radiation Pipe 1 is corresponding with two burner assemblies 2 and between n radiant tube 1 is connected into two burner assemblies 2, thus, in the present embodiment One radiant tube heater 100 can be equivalent to n radiant tube heater in correlation technique, so as to reduce burner 21, commutation The quantity of the accessory kits such as valve, regulating valve, is occupied little space, and reduces operating point and trouble point, and radiant tube heater 100 is run It is more stable, mouth preceding pipeline is simplified, so as to facilitate maintenance and operation, and the adjacent spoke of each radiant tube heater 100 The clear spacing penetrated between pipe 1 can not be limited by the volume of burner 21；It is being shaped as in addition, being applied when radiant tube heater 100 When in the body of heater 200 of annular, be advantageous to radiant tube heater 1000 and the circumferential direction of the body of heater 200 of type ball pyrolysis oven 1000 Matching, consequently facilitating placing more radiant tube heaters 100 in the body of heater 200 of type ball pyrolysis oven 1000.

According to some embodiments of the utility model, the area of passage of the inlet end of each subchannel 2111 is identical.So as to Air flow direction in each subchannel 2111 is identical, may be such that the drag losses of each radiant tube 1 is consistent, is advantageous to improve radiation Heat transfer effect between pipe 1 and material.

Alternatively, flow distribution plate 22 is steel part.For example, flow distribution plate 22 forms for heat resisting steel is cast.Alternatively, flow distribution plate 22 Thickness be 2~6mm, thus, so as to be advantageous to improve flow distribution plate 22 intensity.

Alternatively, radiant tube 1 is steel part, for example, radiant tube 1 is that heat resisting steel is cast or be welded.

According to some embodiments of the utility model, as shown in figure 9, each radiant tube 1 is U-tube or W type pipes, each spoke The angle penetrated between the first port 11 of pipe 1 and the line direction of second port 12 and the axial direction of burner 21 is α, and α meets： 0 ° of 90 ° of ＜ α ＜.Thus, when radiant tube heater 100 is applied in type ball pyrolysis oven 1000, the inclination of radiant tube 1 is advantageous to Arrangement, the portions that the superposed portions of each radiant tube 1 can be avoided to be pointed to bottom have hot shadowing effect, from And in the heating process to type ball, being advantageous to different piece of the different type balls respectively with each radiant tube 1 fully contacts, and carries High heating effect, eliminate the influence of hot shadowing effect.Certainly, the utility model not limited to this, in further embodiments, such as scheme It is vertical between the first port 11 of each radiant tube 1 and the line direction of second port 12 and the axial direction of burner 21 shown in 8 Set.

Here, it is necessary to which explanation, the axial direction of burner 21 refer to the length direction of burner 21.

In some embodiments of the utility model, as shown in figure 4, radiant tube heater 100 also includes two inlet tubes 3, two inlet tubes 3 and two burner assemblies 2 are corresponded and set, the air inlet 2112 of each inlet tube 3 and inlet channel 211 It is connected, consequently facilitating the connection of burner 21 and other pipelines.

Specifically, in the circumference of body of heater 200, multiple spaced radiant tube heaters 100 can be provided with, multiple It is located at every the radiant tube heater 100 of setting in same level height, i.e., there was only one layer of radiant tube on the above-below direction of body of heater Heater 100, this layer of radiant tube heater 100 includes multiple radiant tube heaters 100 and multiple radiant tube heaters 100 are in stove It is intervally arranged in the circumferential direction of body 200.Certainly, multilayer radiant tube heater can also be set on the above-below direction of body of heater 200 100, every layer of radiant tube heater 100 includes multiple radiant tube heaters 100 and every layer of multiple radiant tube heaters 100 are in stove It is intervally arranged in the circumferential direction of body 200, every layer of radiant tube heater 100 is located in same level height.

Specifically, as shown in fig. 7, body of heater 200 includes interior ring-side wall 201 and outer shroud side wall 202, outer shroud side wall 202 is located at The outside of interior ring-side wall 201, radiant tube heater 100 be located at interior ring-side wall 201 and outer shroud side wall 202 it is at least one on.Example Such as, when multiple radiant tube heaters 100 are located at same level height, the width between interior ring-side wall 201 and outer shroud side wall 202 Spend in larger distance when for example the width is between 3.5~7.5m, can be set respectively on interior ring-side wall 201 and outer shroud side wall 202 Radiant tube heater 100；As the smaller such as width≤3.5m of the width distance between interior ring-side wall 201 and outer shroud side wall 202 When, radiant tube heater 100 can be set in one of them of interior ring-side wall 201 and outer shroud side wall 202.Herein it is appreciated that It, when multiple radiant tube heaters 100 are located at same level height, is specifically simultaneously in outer ring-side wall 202 and interior ring-side wall to be Radiant tube heater 100 is set on 201, or radiant tube is set in one of them of outer ring-side wall 202 and interior ring-side wall 201 Heater 100, the length of this width distance and radiant tube 1 between interior ring-side wall 201 and outer shroud side wall 202 are relevant.

Preferably, multiple radiant tube heaters 100 are respectively equipped with interior ring-side wall 201 and outer shroud side wall 202, positioned at inner ring Multiple radiant tube heaters 100 in side wall 201 interior ring-side wall 201 circumferentially-spaced arrangement, in outer shroud side wall 202 Multiple radiant tube heaters 100 outer ring-side wall 202 circumferentially-spaced arrangement.

Further, multiple radiant tube heaters 100 on interior ring-side wall 201 and in outer shroud side wall 202 Multiple radiant tube heaters 100 be located in same level height.Certainly, multiple radiant tubes on interior ring-side wall 201 add Hot device 100 and multiple radiant tube heaters 100 in outer shroud side wall 202 can not also be located in same level height.

The operation principle of pyrolytic process and type ball-type ball pyrolysis oven is illustrated below.

Pyrolytic process is：Processing is dried in carbon-based raw material first, lime stone carries out calcination processing, then crush respectively, Mixing and pressure ball processing, and pressure ball is pyrolyzed in type ball pyrolysis oven, obtain high-quality tar, high heating value gas and pyrolysis Solid product.Wherein, pyrolysis solid product contains quick lime and one kind in coke, semicoke and carbon black, will be pyrolyzed solid Product, into electric arc furnaces, carries out metallurgy, and obtain calcium carbide in not less than 450 DEG C inputs of temperature.

Type ball pyrolysis oven therein, is one of key equipment in whole technique, is that one kind uses rotary furnace bottom delivery pressure The pyrolysis special purpose device of ball, it uses the heat accumulation type radiant tube hot type ball in above-described embodiment, cold conditions type ball is pyrolyzed, So as to obtain high-quality tar, high heating value gas and pyrolysis solid product.

The technical process of type ball pyrolysis oven is：Type ball charging-heat temperature raising pyrolysis-pyrolysis discharge oil gas-remaining solid The hot discharging of thing.

Qualified pellet is sieved into type ball pyrolysis oven charging door top through pressure ball from what the conveying of raw material preparation system came Feed bin, by the batcher device being located under feed bin, it is fed into stove, the flow of material is automatically controlled according to furnace bottom velocity of rotation, Meet the requirement of continuous cloth.Type ball is thick in 60~120mm of charging tray upper berth.

The furnace bottom uniform rotation of type ball pyrolysis oven, carry type ball of the cloth on furnace bottom and pass through each section successively.Pass through tune Save furnace bottom velocity of rotation, thus it is possible to vary material block heats up time of pyrolysis in stove.Expect that heating pyrolysis time of the block in stove is general For 45~90 minutes.

Type ball pyrolysis oven is circular ring type burner hearth, is respectively divided into loading area, preheating zone, one area of reaction to reacting 5th area totally six Individual temperature-controlled area and discharge zone.Type ball is moved with furnace bottom, and pyrolytic process is completed after undergoing above-mentioned each area, is separated out oil gas and is sent to oil Gas collecting region carries out Oil-gas Separation, and remaining hot pelletizing (upgraded coal and quick lime), which discharges out of the furnace, to be heat-fed to furnace of calcium carbide.

In order to realize the complete pyrolysis of coal in pelletizing, each reaction zone must is fulfilled for pyrolysis temperature condition, and its highest furnace temperature can Up to 850 DEG C；It is high-temperature oil gas in burner hearth, containing a large amount of combustible components, to ensure that type ball pyrolysis oven uses radiant tube isolated completely Flue gas and oil gas, it is that burning is carried out in pipe the characteristics of radiant tube, flue gas completely cuts off completely with the atmosphere in burner hearth, it is ensured that is pyrolyzed Gas is not joined mixed by flue gas.

Hot pelletizing is continuously discharged by being arranged at the spiral discharging machine above furnace bottom, via the discharge valve of type ball pyrolysis oven And connected conduit, realize the output of hot material after pyrolysis.

In Lu Neige areas, the heat accumulation type radiant tube burning coal gas installed in burner hearth both sides, mild pyrolysis is risen for mixed type ball Heat is provided.Lu Neige areas temperature is controlled by the gas volume and air capacity for adjusting Regeneration type Radiant Tube Burner in each reaction zone, To reach optimal pyrolysis effect and drop temperature.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area Technical staff the different embodiments or example and the feature of different embodiments or example described in this specification can be entered Row combines and combination.

Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in the scope of the utility model It is interior above-described embodiment to be changed, changed, replaced and modification.

Claims (8)

1. A kind of 1. type ball pyrolysis oven, it is characterised in that including：

   Body of heater, the body of heater are formed as annular shape；

   Radiant tube heater, the radiant tube heater are located in the side wall of the body of heater, and the radiant tube heater includes：

   N radiant tube, the n radiant tubes are intervally arranged into substantial arc shape in the circumferential direction of the body of heater, each The radiant tube is respectively provided with first port and second port, wherein, n >=2；

   Two burner assemblies, each burner assembly include burner and (n-1) individual flow distribution plate, be provided with each burner into Gas passage, (n-1) the individual flow distribution plate be spaced turn up the soil be located in the corresponding inlet channel and with the inlet channel Side wall limit the separate subchannels of n jointly, the inlet end of the n subchannels limits the air inlet and led to jointly The air inlet in road, a pair of the first port of n radiant tubes and the n of one of them burner assembly subchannels 1 Should and connection set, a pair of the second port of n radiant tubes and the n of another burner assembly subchannels 1 It and should connect and set.
2. 2. type ball pyrolysis oven according to claim 1, it is characterised in that the flow-passing surface of the inlet end of each subchannel Product is identical.
3. 3. type ball pyrolysis oven according to claim 1, it is characterised in that the flow distribution plate is steel part.
4. 4. type ball pyrolysis oven according to claim 1, it is characterised in that each radiant tube is U-tube or W type pipes.
5. 5. type ball pyrolysis oven according to claim 4, it is characterised in that the first port and second of each radiant tube Angle between the line direction of port and the axial direction of the burner is α, and α meets：0 ° of 90 ° of ＜ α ＜.
6. 6. type ball pyrolysis oven according to claim 1, it is characterised in that the radiant tube heater also includes two imports Pipe, two inlet tubes and two burner assemblies are corresponded and set, each inlet tube and the inlet channel Air inlet be connected.
7. 7. the type ball pyrolysis oven according to any one of claim 1-6, it is characterised in that the radiant tube heater is located at Interior ring-side wall and the outer shroud side wall of the body of heater it is at least one on.
8. 8. type ball pyrolysis oven according to claim 7, it is characterised in that divide on the interior ring-side wall and the outer shroud side wall Not She You multiple radiant tube heaters, multiple radiant tube heaters on the interior ring-side wall are in the inner ring The circumferentially-spaced arrangement of side wall, multiple radiant tube heaters in the outer shroud side wall are in the outer shroud side wall Circumferentially-spaced arrangement.