CN106480551B - Pre-oxidation furnace hot air circulating system - Google Patents
Pre-oxidation furnace hot air circulating system Download PDFInfo
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- CN106480551B CN106480551B CN201611192171.4A CN201611192171A CN106480551B CN 106480551 B CN106480551 B CN 106480551B CN 201611192171 A CN201611192171 A CN 201611192171A CN 106480551 B CN106480551 B CN 106480551B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
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Abstract
The present invention provides a kind of pre-oxidation furnace hot air circulating system, which includes furnace body, ventilation terminal and concentration air exhausting device；Circulation air path and wind-supplying mouth are equipped in furnace body；There is cavity, cavity is enclosed by all sides and both ends of the surface to be set inside ventilation terminal；End face is in outer gibbosity, and other end is recessed；Several pilot holes being connected to cavity are equipped on end face；Ventilation terminal is installed in circulation air path, and end face is windward；Integrated air exhaust device includes exhaust fan, supervisor and several branch pipes；Supervisor one end is connect with exhaust fan, and the other end is connected to air；Branch pipe one end is connected to circulation air path, and the other end is connected to supervisor；The intermediate position of branch pipe disconnects and has gap.This programme can solve the problems, such as temperature unevenness in circulation canal, and the even distributing wind inside circulation canal is realized through ventilation terminal, realize voltage stabilizing air draft through air exhausting device, and then realize the uniformity of internal temperature.
Description
Technical field
The present invention relates to technical field of carbon fiber preparation, more particularly, to a kind of pre-oxidation furnace hot air circulating system.
Background technology
Carbon fiber is in preparation process, it is necessary first to carry out pre-oxidation treatment to the felt of raw material establishment, this process is logical
Often need pre-oxidation kiln in carry out, while felt is moved with conveying equipment in burner hearth with burner hearth in predetermined temperature range
Hot-air in oxygen react, the hot blast temperature uniformity for pre-oxidizing kiln directly affects the pre-oxidation effect of product,
And the hot blast temperature uniformity of traditional hot air circulation structure is only ± 10 DEG C at present, also far from achieving the purpose that steady production.
Invention content
The present invention provides a kind of pre-oxidation furnace hot air circulating system, for overcoming the deficiencies of existing technologies, it is intended to improve heat
Hot blast temperature uniformity in air circulating system, and then improve the pre-oxidation quality of product.
To achieve the above object, the present invention provides a kind of pre-oxidation furnace hot air circulating system, including：
Furnace body is provided with circulation air path in the furnace body；
Ventilation terminal, inside have a cavity, the cavity enclosed by all sides and positioned at the end face at all side both ends set and
At；One of them described end face is in outer gibbosity, and another end face is recessed；Be both provided on the end face it is several with it is described
The pilot hole of cavity connection；The ventilation terminal is installed in the circulation air path, one of them described end face is arranged windward；
Integrated air exhaust device, including exhaust fan, supervisor and several branch pipes；Described supervisor one end and the exhaust fan
Suction opening connects, the other end and atmosphere；Described branch pipe one end is connected to the circulation air path, and the other end connects with the supervisor
It is logical；The middle part of the branch pipe disconnects and is formed with gap.
Further, the branch pipe of the integrated air exhaust device forms two ports in gap, wherein close to the supervisor
Port on be fixed with shroud far from the supervisor port fan housing, the fan housing and far from the supervisor port between have
There is gap.
Further, the circulation air path includes the air intake passage and return air channel of head and the tail connection；
The air intake passage is set in the furnace body side by side along its length with the return air channel；
The branch pipe of the integrated air exhaust device is communicated in the intersection of the air intake passage and return air channel, or is communicated in institute
State the position on return air channel and close to the air intake passage.
Further, circulating fan and heater are provided in the return air channel；Be provided on the return air channel to
The wind-supplying mouth of a few connection return air channel and air, the wind-supplying mouth are located at the concentration on air-flow direction and arrange
The rear of the branch pipe of wind apparatus.
Further, the return air channel includes return flow line and heating channel successively from import to outlet；The reflux
The cross sectional dimensions in channel is more than the cross sectional dimensions in the heating channel；The heater is located in the heating channel, institute
It states circulating fan and wind-supplying mouth is respectively positioned in the return flow line.
Further, the circulating fan close to the return flow line end and be installed on the side wall of the return flow line
On, the position that the return flow line is connected with the heating channel is provided with for the gas importing heating in return flow line is logical
Return air deflector in road.
Further, the return air deflector includes cambered plate and at least one along tangentially extending flat in the cambered plate end
Panel, the cambered plate are fixedly connected or are integrally formed with the surface plate.
Further, at least one air filter is provided in the return flow line, the air filter is located at institute
It states between wind-supplying mouth and the circulating fan.
Further, at least raw material conveying device is provided in the air intake passage；
The raw material conveying device includes driving part, driving shaft and the driven shaft parallel with the driving shaft；
The driving shaft at least both ends have the drive sprocket rotated together with the driving shaft, the driven shaft both ends tool
There is the driven sprocket rotated together with the driven shaft；
Drive sprocket and driven sprocket positioned at the driving shaft and driven shaft homonymy is respectively by being set around respective outer rim
On driving chain be sequentially connected；
The power output end of the driving part is sequentially connected with the driving shaft；
Several supporting rods are installed, the supporting rod is each parallel to the driving shaft or parallel between two driving chains
In the driven shaft.
Further, the pre-oxidation furnace hot air circulating system further includes extinguishing device, and the extinguishing device includes：
Air inlet pipe, inside are connected with inert gas, and end is connected to the air intake passage；
Valve is arranged in the air inlet pipe, and opens or closes the air inlet pipe under the action of controller；
Temperature sensor, induction end are located in the air intake passage, and signal output end connects the controller；
The controller, input terminal connect the temperature sensor, and output end connects the valve；It is received for basis
The value of temperature signal and the comparison result of threshold value control the action of the valve.
Pre-oxidation furnace hot air circulating system provided by the invention, during use, when raw material moves in circulation air path, heat
Wind after ventilation terminal by having achieved the effect that even distributing wind, the uniformly distributed high temperature air stream and the original in channel that are come out through ventilation terminal
Material carries out oxidation reaction, and the tail gas after reaction, through branch pipe, the outer row of supervisor, is drained through journey under the action of exhaust fan outside tail gas
In, there are pressure differences, air to enter circulation canal by wind-supplying mouth between air inside circulation air path, when main overpressure is relatively low
When, air can be sucked by the gap of branch pipe gap, to keep the pressure balance inside circulation air path, by ventilation terminal with
Integrated air exhaust device synergistic effect ensure that the temperature inside circulation air path is uniform, improve the uniformity of raw material internal temperature into
And improve the quality of carbon fiber product pre-oxidation treatment.
Description of the drawings
Fig. 1 is the longitudinal cross-section structural schematic diagram of pre-oxidation furnace hot air circulating system provided in an embodiment of the present invention；
Fig. 2 is the lateral cross section structural schematic diagram of pre-oxidation furnace hot air circulating system provided in an embodiment of the present invention；
Fig. 3 a are the dimensional structure diagram of the preferred embodiment one of ventilation terminal in Fig. 1；
Fig. 3 b are the dimensional structure diagram of the preferred embodiment two of ventilation terminal in Fig. 1；
Fig. 4 a are the front view of integrated air exhaust device preferred embodiment one in Fig. 1；
Fig. 4 b are the left view of Fig. 4 a；
Fig. 4 c are the structural schematic diagram of integrated air exhaust device preferred embodiment two in Fig. 1；
Fig. 5 a are the structural schematic diagram of raw material conveying device in Fig. 1；
Fig. 5 b are the left view of Fig. 5 a；
Fig. 6 is the structural schematic diagram of the extinguishing device in pre-oxidation furnace hot air circulating system provided in an embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, the every other reality that ordinary skill people is obtained without creative efforts
Example is applied, shall fall within the protection scope of the present invention.
Embodiment
As shown in figures 1-4, the present invention provides a kind of pre-oxidation furnace hot air circulating system, including furnace body 10, ventilation terminal 20,
Integrated air exhaust device 30；At least one wind-supplying mouth for being provided with circulation air path 11 in furnace body 10 and being connected to circulation air path 11
12；
The inside of ventilation terminal 20 has a cavity, and cavity is by all sides 23 and positioned at the first end face 21 at 23 both ends of all sides and the
Biend 22, which encloses, to be set；First end face 21 is in outer gibbosity, and second end face 22 is recessed；First end face 21 and second end face 22
On be both provided with several pilot holes 24 being connected to cavity；Ventilation terminal 20 is installed in circulation air path 11, first end face 21 or the
Biend 22 is arranged windward；
Integrated air exhaust device 30 includes exhaust fan 31, supervisor 32 and several branch pipes 33；It is responsible for 32 one end and exhaust fan
31 suction opening connection, the other end and atmosphere；33 one end of branch pipe is connected to circulation air path 11, and the other end connects with supervisor 32
It is logical；The intermediate position of branch pipe 33 disconnects and is formed upper port and lower port, has gap between upper port and lower port.Disconnecting unit
Branch pipe 33 is divided into two parts by position, wherein being the first branch pipe 331 below gap, it is second to be located above gap
Branch pipe 332.
Pre-oxidation furnace hot air circulating system provided by the invention, by 20 weeks sides of ventilation terminal close to 11 inner wall of circulation air path,
First end face 21 or second end face 22 are placed in face of air-flow source, and air-flow enters through first end face 21 in cavity in the present embodiment,
By 21 cloth wind of first end face, air-flow is further flowed out through second end face 22 out of cavity again after unprecedented internal reflux,
By 22 secondary wind distribution of second end face, while the cavity shape set is enclosed jointly using concavo-convex end face and all sides and weakens air flow source
Middle position air-flow is strong, the weak distribution form of marginal position air-flow, improves air-flow percent of pass, uniform wind resistance distribution.
During use, when raw material moves in circulation air path 11, after ensureing the hot wind for blowing to raw material by ventilation terminal 20
It is uniformly distributed, the uniform high temperature air stream come out through ventilation terminal 20 carries out oxidation reaction, the tail after reaction with the raw material in channel
Gas outer row under the positive action of integrated air exhaust device 30, during arranging outside, in order to ensure the air inside circulation air path 11
In there is enough oxygen to carry out oxidation reaction with original, need inwardly to fill into air, such integrated air exhaust device 30 just needs energy
The pressure balance inside circulation air path 11 is enough maintained, just can guarantee final hot wind uniformly across raw material, to ensure raw material
Temperature is uniform.
Hot wind outside branch pipe 33, supervisor 32 through arranging under the action of exhaust fan 31, during row outside tail gas, circulation air path
There are pressure differences, air to enter circulation canal by wind-supplying mouth 12 between internal and air, when pressure is relatively low in supervisor 32, passes through
The gap of 33 gap of branch pipe can suck air, to keep the pressure balance inside circulation air path 11, by ventilation terminal 20 with
The synergistic effect of integrated air exhaust device 30 ensures that the temperature inside circulation air path is uniform, the temperature during pre-oxidation treatment inside raw material
Reachable ± 1.2 DEG C of uniformity is spent, the quality of carbon fiber product pre-oxidation treatment is substantially increased.
First end face 21 and second end face 22 can be coniform, pyramid-shapeds or rotating curve is parabola, streamline etc.
The surface of revolution of curve；All sides 23 can be all sides of the geometries such as cylindrical surface, prism, can also be Irregular Boundary Surface
Or the combination of plane；It can be fixedly connected, can also be integrally formed between first end face 21 and second end face 22 and all sides 23.
Here pilot hole 24 can be provided in end face (first end face 21 and second end face 22) inside, pass through pilot hole 24 itself
Length direction realizes guide function, pipeline can also be arranged in end face (first end face 21 and second end face 22), by pipe
Realize guide function in the direction in road.The effect of pilot hole 24 is air-flow being oriented to the same direction, realization air-flow convergence.
20 two kinds of preferred embodiments of ventilation terminal are given below：
Preferred embodiment one：Referring to Fig. 3 a, first end face 21, second end face 22 are paraboloid, form the two of cavity
Paraboloid interlaced arrangement.Paraboloid interface parabolically shape, it is similar to wind load distribution curve, more it is distributed close to load
Face further decreases resistance, improves the efficiency that air-flow penetrates pilot hole 24.
Preferred embodiment two：Referring to Fig. 3 b, first end face 21, second end face 22 include L-shaped part, form the two of cavity
L-shaped part interlaced arrangement.The longitudinal section of L-shaped part is in horn shape, is formed by two faces, and wherein a side on two sides overlaps, another side
Extend respectively to the direction of diverging, forms ridge, two sides can be plane, can also be curved surface, and side overlapping position can be
Wedge angle can also be fillet；L-shaped part can air-flow middle position is strong, that marginal position is weak gather in one direction, pass through
The interlaced arrangement of L-shaped part is realized gathering on duct cross-section direction and is evenly distributed with, simple in structure, is easy to make, production cost is relatively low.
L-shaped part includes two surface plates, and the angle between two surface plates is between 30 °~150 °.It specifically can be according to different technique tune
It saves angle, while by arranging that ventilating duct not of uniform size adjusts the intake of working space, makes hot wind uniformly, evenly pass through
Working space improves temperature uniformity.
The L-shaped part that first end face 21 is constituted in the present embodiment includes first panel 211 and second panel 212, constitutes second
The L-shaped part of end face 22 includes third panel 221 and fourth face plate 222, and all sides 23 include the first side of side head and the tail connection
231, second side 232, third side 233 and the 4th side 234；(first side 231 and between two sides adjacent to each other
Between two side faces 232, between second side 232 and third side 233, between third side 233 and the 4th side 234 and
Between four sides 234 and first side 231) angle be 90 °；First side 231, second side 232,233 and of third side
4th side 234 be located therein one end (left end) end edge be sequentially connected with first panel 211 and second panel 212 inner side edge,
211 upper side edge of first panel, the outer side edges of first panel 211 and second panel 212,212 lower side of second panel；First side
231, second side 232, third side 233 and the 4th side 234 are located therein the end edge of the other end (right end) and are sequentially connected with
The inner side edge of three panels 221, the upper side edge of third panel 221 and fourth face plate 222, the outer side edges of fourth face plate 222, third face
The lower side of plate 221 and fourth face plate 222.Be easy to make, and with the structure matching of circulation air path 11, facilitate installation, be not easy
Wind can achieve the effect that even distributing wind.
Further, referring to Fig. 4 a, Fig. 4 b and Fig. 4 c, integrated air exhaust device 30 further includes holder 34, and supervisor 32 passes through more
A holder 34 is supported on furnace body 10, with the stability of air exhausting device in enhancing collection 30；In addition, to increase water conservancy diversion effect, upper
Port is fixed with the fan housing 35 for shrouding lower port, has gap between fan housing 35 and lower port.Fan housing 35 is to from the first branch pipe 331
The air-flow of extraction has reversed cushioning effect, to further decrease the pressure difference inside the second branch pipe 332 and the first branch pipe 331,
Keep circulation air path air pressure inside balance.
Fan housing 35 in an axial direction from close to the second branch pipe 332 one end to far from the second branch pipe 332 one end open size by
It is cumulative big.The size at 35 big opening end of fan housing is more than the opening size of the first branch pipe 331, in this way could cover the first branch pipe 331
Firmly.The shape of fan housing 35 is in horn-like, is buckled in 331 open top end of the first branch pipe, on the one hand plays guide functions, on the other hand
Be conducive to the reversed buffering of air-flow.
As the preferred embodiment one of fan housing 35, fan housing 35 is prism-frustum-shaped.When branch pipe 33 is using square tube, may be used
The shape of truncated rectangular pyramids improves water conservancy diversion effect, and in addition to this, when branch pipe 33 is using pipe, fan housing 35 can also be surface of revolution
Shape.
As the preferred embodiment two of fan housing 35, fan housing 35 is truncated cone-shaped.
As the preferred embodiment three of fan housing 35, the busbar for forming surface of revolution is camber line, and the camber line is relative to shape
It is in umbrella shape at boning out (axis) outside projection of surface of revolution.The water conservancy diversion effect of fan housing 35 is relatively notable.
As the preferred embodiment four of fan housing 35, the busbar that forms surface of revolution is camber line, the camber line be relative to
The boning out (axis) for forming surface of revolution is recessed inwardly.The reversed buffering effect of fan housing 35 is relatively notable.
On the basis of the above embodiments, in order to control exhaust air rate, can also check valve be set on the second branch pipe 332
Door；Further, since the length of supervisor 32 is longer, can be formed by connecting by more piece pipe, for example, passing through soft company between 2-section pipe road
Take over 36 (length compensator) connects, and 36 length of hose connector can change, when central axis is not between adjacent 2-section pipe road
It when coincidence, can also be docking together, installation accuracy and installation requirement be reduced, in addition, for by exhaust fan 31 or furnace body 10
The vibration of generation can also play cushioning effect.
Further, to make the tail gas after pre-oxidation treatment more as possible by being arranged outside integrated air exhaust device 30,
And pre-oxidation treatment efficiency is further increased, circulation air path 11 includes the air intake passage 111 and return air channel 112 of head and the tail connection；
Air intake passage 111 is set in furnace body 10 side by side along its length with return air channel 112；At least one is provided on return air channel 112
The wind-supplying mouth 12 of a connection return air channel 112 and air；To ensure that hot blast temperature is uniform, wind-supplying mouth 12 is on air-flow direction
Positioned at the rear of the branch pipe 33 of integrated air exhaust device；Branch pipe 33 is connected to the tail portion of furnace body 10 in the present embodiment, and be communicated in into
The intersection in wind channel 111 and return air channel 112.In addition, branch pipe 33 is communicated on return air channel 112 and close to air intake passage
111 position, branch pipe 33 are connected to the side wall of furnace body 10 and close to tail positions.
Further, at least one circulating fan 113, heater 114, air filter are provided in return air channel 112
115；Wind-supplying mouth 12 is connected to return air channel 112 and air.Cold wind passes through heater 114 through wind-supplying mouth 12 into return airway 112
Heating, is sent to air intake passage.
Further, return air channel 112 includes return flow line 112a and heating channel 112b successively from import to outlet；It returns
The cross sectional dimensions of circulation road is more than the cross sectional dimensions in heating channel；Heater 114 is located in heating channel, circulating fan
113 and wind-supplying mouth 12 be respectively positioned in the 112a of return flow line.The cross sectional dimensions of return flow line 112a is larger, is conducive to gas stream
It is dynamic, heat channel 112b cross sectional dimensions is smaller and the position of heater 114, be conducive to gas interior and carry out heat exchange,
The uniformity of temperature, the larger extraneous gas that is conducive to of the position pressure difference of wind-supplying mouth 12 is kept to enter return air channel 112.
Further, side wall of the circulating fan 113 close to the end of return flow line 112a and positioned at return flow line 112a returns
Circulation road 112a is provided with logical for the gas in the 112a of return flow line to be imported heating with the positions being connected heating channel 112b
Return air deflector 116 in road 112b.
Further, to improve water conservancy diversion effect, return air deflector 116 is cut including cambered plate and at least one along cambered plate end
To the surface plate of extension, cambered plate is fixedly connected or is integrally formed with surface plate.Air-flow is in flow process by return air deflector
The impact of 116 cambered plates, surface plate tangentially, which enters, upwards heats channel 112b.
Further, referring to Fig. 5 a, Fig. 5 b, raw material conveying device 40 is at least provided in air intake passage 111；Raw material is defeated
It includes driving part 41, driving shaft 42 and the driven shaft 43 parallel with driving shaft 42 to send device 40；At least both ends of driving shaft 42
With the drive sprocket 421 rotated together with driving shaft 42, driven shaft 43 at least both ends have to be rotated together with driven shaft 43
Driven sprocket 431.
Drive sprocket 421 and driven sprocket 431 positioned at driving shaft 42 and 43 homonymy of driven shaft is each by being set around respectively
It is sequentially connected from the driving chain 44 in outer rim；The power output end of driving part 41 is sequentially connected with driving shaft 42；Two transmissions
Several supporting rods 45 are installed, supporting rod 45 is each parallel to driving shaft 42 or is parallel to driven shaft 43 between chain 44.
The conveyer belt that several supporting rods 45 by two driving chains 44 and between two driving chains 44 are formed
Pre-oxidation felt is conveyed, on the one hand the flexibility with belt, can deform in corner；On the other hand metal etc. may be used
High temperature resistant material is made, and meets applied at elevated temperature environment, substantially prolongs the service life of conveying device, and reduces cost.
Further, to further increase the flatness and stability of transmission belt, steel wire can be installed on supporting rod 45
Net 46.Steel wire 46 can be fixed on by fastener etc. on supporting rod 45.
Further, it is not limited by plastic deformation can be generated, scope of selecting material is higher, in order to preferably adapt to hot environment
Use, and improve that intensity is high, prolong the service life length, supporting rod 45 may be used metal material and be made.
In the present embodiment, driving part 41 includes motor and speed reducer, is led between the output shaft and driving shaft 42 of speed reducer
Cross the drive connection of shaft coupling 47.Speed reducer can be directly connected to for reducing the output rotating speed of motor between motor and speed reducer,
Or coaxial arrangement, motor also specifically can be selected, the motive power outputting apparatus that speed reducer is integrated in one, shaft coupling 47 can reduce by two
Vibration between connector, and coaxial accuracy is higher after installation.
An at least redirection unit can be further added, the trend of driving chain 44 can be changed by redirection unit, pre-
The discharging section for aoxidizing felt forms a trough, and pre-oxidation felt rises to trough peak with it, then declining therewith, in decline
In the process, by the power along 44 moving direction of driving chain, to promote pre-oxidation felt and steel wire 46 or supporting rod 45
Separation, in an embodiment of the present invention, redirection unit include transmission shaft 48 and are at least set to 48 both ends of transmission shaft and with transmission
The changed course sprocket wheel 481 that axis 48 rotates；Two driving chains 44 correspondence is set around on changed course sprocket wheel 481；Transmission shaft 48 is located at drive chain
Between wheel 421 and driven sprocket 431, and for strutting driving chain 44 outward.It can also be changed by two redirection units
The moving direction for becoming driving chain 44, to improve the stability of conveying.
To increase the flexibility of conveying device, the diameter of changed course sprocket wheel 481 is less than the diameter of drive sprocket 421, and changes
It is less than the diameter of driven sprocket 431 to the diameter of sprocket wheel 481.
Further, referring to Fig. 6, pre-oxidation furnace hot air circulating system further includes extinguishing device 50, and extinguishing device 50 includes
Air inlet pipe 51, valve 52, temperature sensor (not shown) and controller (not shown)；It is connected with inert gas inside air inlet pipe 51,
End is connected to air intake passage 111；Valve 52 is arranged in air inlet pipe 51, and opens or closes air inlet under the action of controller
Pipe 51；Temperature sensor senses end is located in air intake passage 111, and signal output end connects controller；Controller input terminal connects
Temperature sensor, controller output end connecting valve 52, for the comparison knot according to the value and threshold value of temperature signal received
The action of fruit control valve 52.
Valve 52 is in normally off, and the threshold value of controller is preset, and threshold value can be according to the ignition point temperature of raw material
Angle value is set, can a little higher than ignition temperature, controller is by signal picker according to scheduled frequency continuous collecting temperature
The temperature signal of sensor is spent, and temperature signal is converted into Extracting temperature value, comparison temperature value and threshold value after digital signal, when
When temperature value is less than threshold value, it is believed that pre-oxidation treatment material does not catch fire, and valve 52 is closed, the inert gas quilt in air inlet pipe 51
It blocks outside channel, when temperature value reaches threshold value, it is believed that the pretreated feedstock in channel catches fire, and controller control valve door 52 is beaten
It opens, air inlet pipe 51 is in and gets through state, and inert gas enters in channel, starvation, prevents burning, puts out a fire rapidly and cool down.
Inert gas can be nitrogen, argon gas etc..
Controller judges that the rule caught fire can also be the difference of the temperature value and previous moment temperature value that judge later moment in time
Whether value is more than threshold value, then judges to catch fire if it is greater than threshold value, and control valve 52 is opened；If the temperature value of later moment in time is with before
The difference of one moment temperature value is less than threshold value, then it is assumed that does not catch fire, valve 52 remains turned-off.
When raw material inside furnace body 10 ignites, temperature drastically increases, and controller detects furnace body 10 by temperature sensor
Internal temperature, when it is more than the threshold value of controller setting, controller control valve door 52 is opened, by air inlet pipe 51 to furnace body
Channel in 10 sprays into inert gas, and inert gas enters in furnace body channel, the effect that starvation is put out a fire rapidly to arrival,
Prevent raw material from the stability of intermediate products is dissolved or reduced during pre-oxidation treatment, to improve the matter of carbon fiber product
Amount.
As a further improvement, air inlet pipe 51 includes main pipe 511 and several branched pipes 512,511 inside of main pipe is logical
There is inert gas；Several branched pipes 512 are arranged along the length direction of main pipe 511, and 512 one end of branched pipe is solid with main pipe 511
Fixed connection, 512 other end of branched pipe stretch into the channel where raw material, and the opening of branched pipe 512 is towards raw material.Branched pipe
512 can be controlled by same valve 52, can be passed through inert gas into air intake passage 111 from different places simultaneously, be put out a fire
It is more rapid.
It, can be on every branched pipe 512 in order to which the position that may be caught fire to each is quickly and accurately put out a fire
One valve 52 is set, and position corresponding with every branched pipe 512 is respectively provided with a temperature sensor.Electricity may be used in valve 52
2/2-way solenoid valve specifically can be used in magnet valve.If the felt somewhere (pretreated feedstock) in channel catches fire, temperature is fast at this
Speed rises, and controller acquires the temperature of each temperature sensor, and the temperature of the temperature sensor at this is more than the temperature threshold of setting
Value, the solenoid valve that controller just controls on the branched pipe 512 of the corresponding position are in opening, to place's spray nitrogen that catches fire, go out rapidly
Fire.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features；
And these modifications or replacements, various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of pre-oxidation furnace hot air circulating system, which is characterized in that including：
Furnace body is provided with circulation air path in the furnace body；
Ventilation terminal, inside have a cavity, and the cavity is by all sides and encloses and sets positioned at the end face at all side both ends；Its
In end face be in outer gibbosity, another end face is recessed；Several and cavity is both provided on the end face
The pilot hole of connection；The ventilation terminal is installed in the circulation air path, one of them described end face is arranged windward；
Integrated air exhaust device, including exhaust fan, supervisor and several branch pipes；The exhausting of described supervisor one end and the exhaust fan
Mouth connection, the other end and atmosphere；Described branch pipe one end is connected to the circulation air path, and the other end is connected to the supervisor；
The middle part of the branch pipe disconnects and is formed with gap.
2. pre-oxidation furnace hot air circulating system according to claim 1, which is characterized in that the branch of the integrated air exhaust device
Pipe forms two ports in gap, shrouds the port far from the supervisor wherein being fixed on the port of the supervisor
Fan housing has gap between the fan housing and the port of the separate supervisor.
3. pre-oxidation furnace hot air circulating system according to claim 2, which is characterized in that the circulation air path includes head and the tail
The air intake passage and return air channel of connection；
The air intake passage is set in the furnace body side by side along its length with the return air channel；
The branch pipe of the integrated air exhaust device is communicated in the intersection of the air intake passage and return air channel, or is communicated in described return
Position on wind channel and close to the air intake passage.
4. pre-oxidation furnace hot air circulating system according to claim 3, which is characterized in that be provided in the return air channel
Circulating fan and heater；The wind-supplying mouth of at least one the connection return air channel and air is provided on the return air channel,
The wind-supplying mouth is on air-flow direction positioned at the rear of the branch pipe of the integrated air exhaust device.
5. pre-oxidation furnace hot air circulating system according to claim 4, which is characterized in that the return air channel from import extremely
Outlet includes return flow line and heating channel successively；The cross sectional dimensions of the return flow line is more than the transversal of the heating channel
Face size；The heater is located in the heating channel, and the circulating fan and wind-supplying mouth are respectively positioned in the return flow line.
6. pre-oxidation furnace hot air circulating system according to claim 5, which is characterized in that the circulating fan is close to described
It the end of return flow line and is installed on the side wall of the return flow line, the position that the return flow line and the heating channel are connected
It installs and is equipped with for the gas in return flow line to be imported to the return air deflector in heating channel.
7. pre-oxidation furnace hot air circulating system according to claim 6, which is characterized in that the return air deflector includes arc
Panel and at least one along the tangentially extending surface plate in the cambered plate end, the cambered plate be fixedly connected with the surface plate or
It is integrally formed.
8. according to claim 5~7 any one of them pre-oxidation furnace hot air circulating system, which is characterized in that the reflux is logical
At least one air filter is provided in road, the air filter is between the wind-supplying mouth and the circulating fan.
9. according to claim 3~7 any one of them pre-oxidation furnace hot air circulating system, which is characterized in that at least described
Raw material conveying device is provided in air intake passage；
The raw material conveying device includes driving part, driving shaft and the driven shaft parallel with the driving shaft；
The driving shaft at least both ends have the drive sprocket that is rotated together with the driving shaft, the driven shaft both ends have with
The driven sprocket that the driven shaft rotates together；
Drive sprocket and driven sprocket positioned at the driving shaft and driven shaft homonymy is respectively by being set around in respective outer rim
Driving chain is sequentially connected；
The power output end of the driving part is sequentially connected with the driving shaft；
Several supporting rods are installed, the supporting rod is each parallel to the driving shaft or is parallel to institute between two driving chains
State driven shaft.
10. according to claim 3~7 any one of them pre-oxidation furnace hot air circulating system, which is characterized in that the pre-oxidation
Stove hot air circulating system further includes extinguishing device, and the extinguishing device includes：
Air inlet pipe, inside are connected with inert gas, and end is connected to the air intake passage；
Valve is arranged in the air inlet pipe, and opens or closes the air inlet pipe under the action of controller；
Temperature sensor, induction end are located in the air intake passage, and signal output end connects the controller；
The controller, input terminal connect the temperature sensor, and output end connects the valve；For according to the temperature received
The comparison result of the value and threshold value of spending signal controls the action of the valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611192171.4A CN106480551B (en) | 2016-12-21 | 2016-12-21 | Pre-oxidation furnace hot air circulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611192171.4A CN106480551B (en) | 2016-12-21 | 2016-12-21 | Pre-oxidation furnace hot air circulating system |
Publications (2)
| Publication Number | Publication Date |
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| CN106480551A CN106480551A (en) | 2017-03-08 |
| CN106480551B true CN106480551B (en) | 2018-08-28 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4009740B2 (en) * | 2002-09-02 | 2007-11-21 | 井関農機株式会社 | Grain dryer burner structure |
| CN103352268A (en) * | 2013-06-19 | 2013-10-16 | 合肥日新高温技术有限公司 | Air outlet collector for hearth of pre-oxidization furnace |
| CN103726132B (en) * | 2013-12-31 | 2016-02-10 | 湖南顶立科技有限公司 | A kind of heated air circulation type pre-oxidation furnace |
| CN203976996U (en) * | 2014-07-09 | 2014-12-03 | 四川创越炭材料有限公司 | A kind of charcoal fiber is melting furnace air inlet distribution apparatus not |
| CN206337340U (en) * | 2016-12-21 | 2017-07-18 | 湖南顶立科技有限公司 | Pre-oxidation furnace hot air circulating system |
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