CN202913112U - Carbon fiber pre-oxidation furnace - Google Patents
Carbon fiber pre-oxidation furnace Download PDFInfo
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- CN202913112U CN202913112U CN 201220296687 CN201220296687U CN202913112U CN 202913112 U CN202913112 U CN 202913112U CN 201220296687 CN201220296687 CN 201220296687 CN 201220296687 U CN201220296687 U CN 201220296687U CN 202913112 U CN202913112 U CN 202913112U
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Abstract
The utility model discloses a carbon fiber pre-oxidation furnace, which is specially designed to be applied to the heat treatment of a high-performance carbon fiber material under 350 DEG C. A furnace body is designed into a modular construction to be conveniently assembled and disassembled. The design of the furnace fully considers and understands the preparation process requirement of the high-performance carbon fiber material and meets the key special requirement as far as possible. According to the preparation process requirement of the material, the pre-oxidation furnace adopts a circulating hot air heating mode, and a circulating wind blowing mode is that wind is blown from the middle of a furnace body to two ends. Several heat treatment cavities are connected in series and in parallel to form a system with a certain temperature gradient. The entire internal furnace adopts an anti-corrosion stainless steel structure, and a thermal insulation material adopts a full-fiber ultra-light material for thermal insulation. Temperature control adopts a PLC (Programmable Logic Controller) temperature control module, and the furnace has the characteristics of high temperature control precision, high temperature stability and the like. The furnace solves the problems that the heat treatment efficiency is low in the pre-oxidation process, the temperature control is not accurate, the temperature uniformity in the heat treatment cavities is not ideal, the precursor burning cannot be prevented, the oxygen content in the furnace is not fully replenished, and the waste gas is not reasonably emitted. The overall energy consumption is lower, and the whole furnace is durable.
Description
Technical field:
The utility model relates to the chemical production equipment field, relates in particular to a kind of carbon fiber pre-oxidation furnace.
Background technology:
Pre-oxidation furnace is for precursor is carried out the heat-treatment furnace that oxidizing thermal treatment prepares oxidized fibre.Pre-oxidation furnace is outside equipped with some guide rollers for the precursor guiding.The basic oxidizing process of precursor is as follows: with the oxidized fibre precursor that the preparation carbon fiber is used, for example, polyacrylonitrile (PAN) base continuous fibers makes them under a lot of guide roller guide effects, passes through hot processing chamber along the operation of Z-shaped path.Precursor can be by pre-oxidation treatment progressively by hot processing chamber the time.In the whole technological process of preparation high-performance carbon fibre, the pre-oxidation operation is very important and crucial step, is the bridge of (carbon fiber) after brought forward (precursor) opens.As the equipment of pre-oxidation operation, the assurance of its properties is development pre-oxidation furnace basis, and its efficient is one of the main factor in production control high-performance carbon fibre cycle, also is the key point that directly affects high performance carbon carbon fiber quality.Pre-oxidation furnace has following four main performance indications: 1. heat treatment efficiency; 2. the temperature homogeneity in the hot processing chamber; 3. the reasonable discharging of the adequacy of burner hearth oxygen content and waste gas, 4. prevention precursor burning in the preoxidation process.
For above performance indications, just there is following point in the pre-oxidation furnace that generally uses at present.
At first, for the temperature homogeneity in heat treatment efficiency and the hot processing chamber.A kind of Stacked outer-heating pre-oxidation oven is arranged, it is provided with a body of heater, be provided with a monofilament burner hearth in the bottom of body of heater, the upper parallel of monofilament burner hearth be provided with 1-5 mariages burner hearth, the upper lower wall of burner hearth is provided with heater, be provided with heat-insulation layer between the adjacent burner hearth, both sides in described burner hearth are respectively equipped with the hot blast jet pipe, the hot blast jet pipe of both sides in opposite directions have a fumarole, hot blast jet pipe in each burner hearth joins with the heating plant of peripheral hardware respectively, is provided with the tow gateway at the two-port place of burner hearth, all is provided with godet roller over against the burner hearth port, godet roller is contained on the two ends sidewall of body of heater, is provided with the waste discharge gas port above the body of heater both sides.The monofilament burner hearth is for passing row's silk in burner hearth, the mariages burner hearth then is the two-way two row's tow that penetrate in burner hearth.Can adopt separate unit independence or two in parallel uses, tow adopts the stacked method of operation in stove.In this technology, the stub area of tow gateway non-uniform temperature is quite large, effective heated length is shortened greatly, reduced heat treatment efficiency, this both sides mode is blown and can be formed disorderly air-flow simultaneously, provide inhomogeneous temperature field to fibre bundle, make the temperature homogeneity in the hot processing chamber not high.
Next is for the reasonable discharging of waste gas, there is a kind of pre-oxidation furnace to be the steel plate framework Welding Structure, be divided into three layers, hot blast enters burner hearth from the top, and the orifice plate by the upper strata body of heater is installed forms certain thermograde, evenly pass tow, make tow generation pre-oxidation, after passing through to filter and heat again from the circulated air outlet of lower floor, enter from the top circulation.Enter the quantity of hot air of burner hearth inside for control, the top body of heater is provided with the solution pressure gate, and pressure was separated pressure gate and automatically opened off-load to when setting value.Because body of heater is tall and big, walks on stage therefore inside is provided with.The middle part oven body part be provided with moving door at fore side, but the moving door forward shift out, moving door is provided with the transparent observing window, is convenient to observe tow pre-oxidation situation.Since this kind form the pre-oxidation furnace hot blast enter burner hearth from the top, by orifice plate, pass tow, during batch production, the tow number of plies is more, it is large that hot blast enters the stove comparison of resistance, is unfavorable for the reasonable discharging of waste gas.
Therefore imagination provides a kind of carbon fiber pre-oxidation furnace equipment to solve the problems referred to above.
The utility model content:
The purpose of this utility model just provides a kind of carbon fiber pre-oxidation furnace, heat treatment efficiency is low in the solution pre-oxidation process process, temperature controlled inaccuracy, temperature homogeneity in the hot processing chamber is undesirable, the problem of the reasonable discharging of the fully additional and waste gas of the burning of prevention precursor, burner hearth oxygen content.
The technical solution adopted in the utility model is:
A kind of carbon fiber pre-oxidation furnace: have some heat-treatment furnaces, body of heater is formed by the heat-treatment furnace Juxtaposition and Superimposition; Each heat-treatment furnace all has left heat treatment cavity, right heat treatment cavity and middle heating cavity, its left hot processing chamber body and right heat treatment cavity are symmetrical structure, be bolted connection between each cavity, left heat treatment cavity and the external end of right hot processing chamber are provided with the multi-layer fiber tow and import and export, and every layer of fibre bundle Import ﹠ Export Department is provided with waste gas transition chamber and cavity sealing regulating; Be provided with hot air circulating system in each heat-treatment furnace, circulated air is in fashion mode by blowing to two ends in the middle of the body of heater, described hot air circulating system comprises the wind path distributor that is installed in the middle heating cavity, the gas that the wind path distributor connects respectively left heat treatment cavity and right heat treatment cavity the inner enters the chamber fairing, the external port place of left heat treatment cavity and right heat treatment cavity is connected with respectively gas and goes out the chamber reflux, each gas goes out chamber reflux outlet and is divided into three the tunnel, the first via is divided into two-way and is connected to return air channel after return valve is regulated, the second the tunnel is directly connected to return air channel, Third Road is connected to the waste gas transition chamber, the waste gas transition chamber is connected to the toxic emission passage by the drainage blower fan, return air channel is provided with new wind and replenishes mouth, by being connected to circulating fan behind filter and the heater, circulating fan was connected to the wind path distributor after the return air channel of left heat treatment cavity and right heat treatment cavity merged; Each heat-treatment furnace has temperature control system alone, and described temperature control system comprises temperature controller, power control component, temperature-measuring element and circuit protection system; Each heat-treatment furnace has alone fire-fighting system, and described fire-fighting system comprises the temperature anomaly detecting element, and the temperature anomaly analysis meter also has pipeline and shower nozzle and the discharge of wastewater pipeline of carrying out water spray; Each heat-treatment furnace all has five access doors and an access hole.
All heat treatment cavity inside in the described heat-treatment furnace all adopt stainless steel or carbon steel tube material to be welded, and comprise the air channel in the heat treatment cavity, air-duct adjusting device etc.; The framework of each cavity mainly adopts carbon steel material, and square tube and angle steel welding are assembled, and antirust processing is all taked on the surface.
Described cavity sealing regulating is shutter, can up-down adjustment, and an expansible when wearing thread is conveniently worn silk; And cavity sealing regulating and the face that tow might contact, all polish to surface roughness be Ra=0.8 μ m, guarantee that tow can not produce to hang a silk phenomenon in heat treatment process; The cavity sealing regulating can be closed into a determining deviation when equipment normally moved, and fibre bundle reduces thermal runaway as far as possible and external air enters in the situation that do not touch, and promoted hot processing chamber to work under slight positive pressure state.
The thermodynamic material of each heat-treatment furnace is all selected fibrous material, and the thermal conductivity factor that it is extremely low and unit weight have reduced weight and the energy consumption of equipment, reduce the equipment surface temperature, volatilize without any pernicious gas simultaneously; Fibrous material is successively laid with the top in inner each process chamber bottom, and every layer gap staggers, and is routed to certain altitude, is compacted to desired height with interior thorax plate again, and make being compressed to of the thickness of anti-the material original 80%; Each process chamber side refractory material then adopts modularization assemble, the method that dislocation is laid, each fibre module has carried out compression to be processed, and makes its filling be full of reality, after completing also with interior thorax plate compression; Fitting surface at left process chamber and heating chamber, be filled with the one layer of heat preservation cotton, make being partially embedded in the cleaved facet of its adjacent inwall and housing, the centre bloats a little, then the two sides combines compression, the anti-material that guarantees fitting surface is filled and is full of reality, avoids the loss of heat, has also guaranteed the global consistency of heating chamber in the body of heater.
In the described hot air circulating system, the wind path distributor is a pair of deep bead that forms an angle with the heating chamber axis, make circulating fan blow into the wind that comes and be divided into uniformly two parts, enter respectively left and right heat treatment cavity, it can be assigned to wind in the left and right heat treatment cavity, and the change wind direction is blown into its level.
In the described hot air circulating system, it is six rib pipe airstream deflectors that gas enters the chamber fairing, and this device is comprised of two parts, and a part is air uniform plate, has uniform small pores, makes the hot blast of coming from the wind path distributor, is equally distributed in the disconnected cross section of heat treatment cavity; Another part is six rib conduits, and the even hot blast of coming from air uniform plate is carried out guide effect, makes the hot processing chamber that is blown into of hot blast level; Have slot in the design of six rib rear end of conduit, air uniform plate is inserted in the slot, becomes Demountable, and cleaning, the replacing be convenient in the future are convenient; The Main Function that gas enters the chamber fairing is the left and right hot processing chamber that blows into that makes the even level of stratification of wind that is blown into, realizes shunting and rectification to hot-air.
In the described hot air circulating system, it is that one group of uncovered can of seven rectangles one side forms that gas goes out the chamber reflux, single gas goes out the chamber reflux and is comprised of two parts, a part is homogenating plate, near heat treatment cavity one side, have non-homogeneous aperture, mesh vertically evenly distributes, cross direction profiles is by dredging to close, the return air plate hole is dredged the close return air channel of an end, and the end of Kong Mi is away from return air channel, and another part is the uncovered can of one side, open face is connected with return air channel, the hot blast of coming from the heat treatment cavity imports return air channel after flowing into can according to certain rule, and this design is in order to guarantee that hot blast can stablize the return air channel that enters smoothly, ensure wind speed stability and the uniformity of cavity, realized good temperature homogeneity.
In the described hot air circulating system, return valve is installed in the return air channel of side, two return valves control respectively three layers of return air and in three layers of return air, bottom return air directly enters the uneasy dress of return air channel control valve; The purpose of two return valves of design be to control in the hot processing chamber upper three layers with in three layers return air amount, the difference of return air amount must cause the up and down difference of temperature, and the return valve of being controlled by system is the inhomogeneity key that guarantees whole heat treatment cavity temperature.
In the described hot air circulating system, filter is formed by the anticorrosion stainless steel cloth processing and fabricating of twice, and dredge in the anterior layer hole, rear layer Kong Mi; Its major function is that the fracture of wire in the circulated air is filtered, and can regularly change online.
In the described hot air circulating system, return air channel is designed with in addition new wind and replenishes mouthful, and new wind replenishes mouthful the manual adjustments valve, can carry out the adjusting of new wind magnitude of recruitment, with the oxygen that is consumed during filament pre-oxidation in the supplementary furnace.
In the described hot air circulating system, the external end of left and right hot processing chamber is designed with the waste gas transition chamber, be equipped with the toxic emission passage on the left and right heat treatment cavity, manual modulation valve is housed on the passage, the waste gas that discharges in the preoxidation process can be discharged in the pipeline of exhaust-gas treatment by this passage.
In the described temperature control system, temperature control instrument is selected the PLC temperature control module, has pid parameter from adjusting and artificial revision function, have simultaneously overtemperature, owe temperature, the power alarm defencive function such as disconnected idol, overtemperature alarm is in case produce, system can cut off electrical source of power immediately, product burning when preventing that temperature control system lost efficacy; Executive component replaces traditional A.C. contactor control with advanced person's SCR phase shift technology, realizes soft contact control, accurate, reliable, long service life; Because voltage is linear output continuously, thereby it is level and smooth stable to heat up, improved the over control that causes because of PID, improved the stability of warm temperature, overcome the problems such as power stage fluctuation that the zero passage mode causes, in case every group of heater arranges the burning of 3 surface loading temperature monitoring thermocouple heaters and cut off immediately heating power supply; The furnace chamber temperature element adopts J calibration temperature-measuring heat couple and temperature-controlling thermal couple, and K calibration thermocouple is adopted in the heter temperature monitoring, and whole system consists of a supervisory system of closed, thereby realizes the in good time closed-loop control of temperature and supervision; In order to detect the uniformity of adjusting temperature, the magnitude settings such as each hot processing chamber temperature controlling point, point for measuring temperature, control point, alarm point are as follows: temperature temperature controlling point: 1, temperature homogeneity point for measuring temperature: 4,8 of warm area monitoring points, exhaust outlet point for measuring temperature: 2, the circulating fan control point: 1, heating element heater control point: 6; Temperature controlling point is as closed-loop control usefulness, and the temperature homogeneity point for measuring temperature is as regulating temperature homogeneity adjusting usefulness in the hot processing chamber; Other control points detect as status of equipment and use.
The temperature anomaly detecting element adopts 8 J type thermocouples in the described fire-fighting system, the temperature anomaly analysis meter is selected the PLC temperature detecting module, executive component adopts electrically operated valve, and the pipeline of execution water spray and shower nozzle and discharge of wastewater pipeline all adopt stainless steel tube.
Compared with prior art, the beneficial effects of the utility model are:
The utility model specialized designs is applied to the high-performance carbon fibre material in the usefulness of heat-treating below 350 ℃.Proper Design becomes modular construction, is convenient to assembly unit and dismounting.Kiln design takes into full account and understands high-performance carbon fibre material preparation technological requirement, its emphasis specific (special) requirements of As soon as possible Promising Policy.According to the material preparation technological requirement, pre-oxidation furnace adopts the recirculated hot air mode of heating, and circulated air is in fashion mode and blows to two ends by in the middle of the body of heater, is formed the system of uniform temperature gradient by several hot processing chamber connection in series-parallel.Internal furnace all adopts anticorrosion stainless steel structure; Insulation material adopts full fiber Ultra-Light Material heat-insulation and heat-preservation; The PLC temperature control module is adopted in temperature control, has temperature-controlled precision, temperature stability high; Heat treatment efficiency is low in the equipment solution pre-oxidation process process, temperature controlled inaccuracy, and the temperature homogeneity in the hot processing chamber is undesirable, the problem of the reasonable discharging of the fully additional and waste gas of the burning of prevention precursor, burner hearth oxygen content.Whole energy consumption is lower, and complete machine is durable in use.
Description of drawings:
Accompanying drawing 1 is the utility model structural representation top view;
Accompanying drawing 2 is the utility model structural representation cutaway view;
Accompanying drawing 3 is the utility model structural representation side view;
Accompanying drawing 4 is the utility model cavity sealing regulating part schematic diagram;
Accompanying drawing 5 is the utility model access door and access hole position view;
Accompanying drawing 6 is the utility model hot air circulating system operation principle schematic diagram;
Accompanying drawing 7 is each parts installation site schematic diagram top view of the utility model hot air circulating system;
Accompanying drawing 8 is each parts installation site schematic diagram cutaway view of the utility model hot air circulating system;
Accompanying drawing 9 is each parts installation site schematic diagram side view of the utility model hot air circulating system.
The specific embodiment:
Below in conjunction with accompanying drawing, by embodiment the utility model is described in further detail:
A kind of carbon fiber pre-oxidation furnace: have some heat-treatment furnaces 1, body of heater is formed by the heat-treatment furnace Juxtaposition and Superimposition; Each heat-treatment furnace 1 all has left heat treatment cavity 2, right heat treatment cavity 3 and middle heating cavity 4, its left hot processing chamber body 2 is symmetrical structure with right heat treatment cavity 3, be bolted connection between each cavity, left heat treatment cavity 2 is provided with the multi-layer fiber tow with right heat treatment cavity 3 outer ends and imports and exports, and every layer of fibre bundle Import ﹠ Export Department is provided with waste gas transition chamber 11 and cavity sealing regulating 5; Be provided with hot air circulating system in each heat-treatment furnace, described hot air circulating system comprises the wind path distributor 6 that is installed in the middle heating cavity, the gas that wind path distributor 6 connects respectively left heat treatment cavity and right heat treatment cavity the inner enters chamber fairing 7, the external port place of left heat treatment cavity and right heat treatment cavity is connected with respectively gas and goes out chamber reflux 8, each gas goes out 8 outlets of chamber reflux and is divided into three the tunnel, the first via is divided into two-way and is connected to return air channel 10 after return valve 9 is regulated, the second the tunnel is directly connected to return air channel 10, Third Road is connected to waste gas transition chamber 11, waste gas transition chamber 11 is connected to the toxic emission passage by the drainage blower fan, return air channel 10 is provided with new wind and replenishes mouth, by being connected to circulating fan 14 behind filter 12 and the heater 13, circulating fan 14 was connected to wind path distributor 6 after the return air channel 10 of left heat treatment cavity and right heat treatment cavity merged; Temperature control system is alone arranged in each heat-treatment furnace, and temperature control system comprises temperature controller, power control component, temperature-measuring element and circuit protection system; Each heat-treatment furnace has alone fire-fighting system, and described fire-fighting system comprises the temperature anomaly detecting element, and the temperature anomaly analysis meter also has pipeline and shower nozzle and the discharge of wastewater pipeline of carrying out water spray; Each heat-treatment furnace all has five access doors 15 and an access hole 16.All heat treatment cavity inside in the heat-treatment furnace all adopt stainless steel or carbon steel tube material to be welded, and comprise the air channel in the heat treatment cavity, air-duct adjusting device etc.; The framework of each cavity mainly adopts carbon steel material, and square tube and angle steel welding are assembled, and antirust processing is all taked on the surface.The cavity sealing regulating is shutter, can up-down adjustment, and an expansible when wearing thread is conveniently worn silk; And cavity sealing regulating and the face that tow might contact, all polish to surface roughness be Ra=0.8 μ m, guarantee that tow can not produce to hang a silk phenomenon in heat treatment process; The cavity sealing regulating can be closed into a determining deviation when equipment normally moved, and fibre bundle reduces thermal runaway as far as possible and external air enters in the situation that do not touch, and promoted hot processing chamber to work under slight positive pressure state.The thermodynamic material of each heat-treatment furnace is all selected fibrous material, and the thermal conductivity factor that it is extremely low and unit weight have reduced weight and the energy consumption of equipment, reduce the equipment surface temperature, volatilize without any pernicious gas simultaneously; Fibrous material is successively laid with the top in inner each process chamber bottom, and every layer gap staggers, and is routed to certain altitude, is compacted to desired height with interior thorax plate again, and make being compressed to of the thickness of anti-the material original 80%; Each process chamber side refractory material then adopts modularization assemble, the method that dislocation is laid, each fibre module has carried out compression to be processed, and makes its filling be full of reality, after completing also with interior thorax plate compression; Fitting surface at left process chamber and heating chamber, be filled with the one layer of heat preservation cotton, make being partially embedded in the cleaved facet of its adjacent inwall and housing, the centre bloats a little, then the two sides combines compression, the anti-material that guarantees fitting surface is filled and is full of reality, avoids the loss of heat, has also guaranteed the global consistency of heating chamber in the body of heater.The wind path distributor is a pair of deep bead that forms an angle with the heating chamber axis, make circulating fan blow into the wind that comes and be divided into uniformly two parts, enter respectively left and right heat treatment cavity, it can be assigned to wind in the left and right heat treatment cavity, and the change wind direction is blown into its level.It is six rib pipe airstream deflectors that gas enters the chamber fairing, and this device is comprised of two parts, and a part is air uniform plate, has uniform small pores, makes the hot blast of coming from the wind path distributor, is equally distributed in the disconnected cross section of heat treatment cavity; Another part is six rib conduits, and the even hot blast of coming from air uniform plate is carried out guide effect, makes the hot processing chamber that is blown into of hot blast level; Have slot in the design of six rib rear end of conduit, air uniform plate is inserted in the slot, becomes Demountable, and cleaning, the replacing be convenient in the future are convenient; The Main Function that gas enters the chamber fairing is the left and right hot processing chamber that blows into that makes the even level of stratification of wind that is blown into, realizes shunting and rectification to hot-air.It is that one group of uncovered can of seven rectangles one side forms that gas goes out the chamber reflux, single gas goes out the chamber reflux and is comprised of two parts, a part is homogenating plate, near heat treatment cavity one side, have non-homogeneous aperture, mesh vertically evenly distributes, cross direction profiles is by dredging to close, the return air plate hole is dredged the close return air channel of an end, the end of Kong Mi is away from return air channel, another part is the uncovered can of one side, and open face is connected with return air channel, the hot blast of coming from the heat treatment cavity, according to importing return air channel behind certain rule inflow can, this design is in order to guarantee that hot blast can stablize the return air channel that enters smoothly, to have ensured wind speed stability and the uniformity of cavity, realizing good temperature homogeneity.Return valve is installed in the return air channel of side, two return valves control respectively three layers of return air and in three layers of return air, bottom return air directly enters the uneasy dress of return air channel control valve; The purpose of two return valves of design be to control in the hot processing chamber upper three layers with in three layers return air amount, the difference of return air amount must cause the up and down difference of temperature, and the return valve of being controlled by system is the inhomogeneity key that guarantees whole heat treatment cavity temperature.Filter is formed by the anticorrosion stainless steel cloth processing and fabricating of twice, and dredge in the anterior layer hole, rear layer Kong Mi; Its major function is that the fracture of wire in the circulated air is filtered, and can regularly change online.Return air channel is designed with in addition new wind and replenishes mouthful, and new wind replenishes mouthful the manual adjustments valve, can carry out the adjusting of new wind magnitude of recruitment, with the oxygen that is consumed during filament pre-oxidation in the supplementary furnace.The external end of left and right hot processing chamber is designed with the waste gas transition chamber, is equipped with the toxic emission passage on the left and right heat treatment cavity, and manual modulation valve is housed on the passage, and the waste gas that discharges in the preoxidation process can be discharged in the pipeline of exhaust-gas treatment by this passage.In the temperature control system, temperature control instrument is selected the PLC temperature control module, has pid parameter from adjusting and artificial revision function, have simultaneously overtemperature, owe temperature, the power alarm defencive function such as disconnected idol, overtemperature alarm is in case produce, system can cut off electrical source of power immediately, product burning when preventing that temperature control system lost efficacy; Executive component replaces traditional A.C. contactor control with advanced person's SCR phase shift technology, realizes soft contact control, accurate, reliable, long service life; Because voltage is linear output continuously, thereby it is level and smooth stable to heat up, improved the over control that causes because of PID, improved the uniformity of warm temperature, overcome the problems such as power stage fluctuation that the zero passage mode causes, in case every group of heater arranges the burning of 3 surface loading temperature monitoring thermocouple heaters and cut off immediately heating power supply; The furnace chamber temperature element adopts J calibration temperature-measuring heat couple and temperature-controlling thermal couple, and K calibration thermocouple is adopted in the heter temperature monitoring, and whole system consists of a supervisory system of closed, thereby realizes the in good time closed-loop control of temperature and supervision; In order to detect the uniformity of adjusting temperature, the magnitude settings such as each hot processing chamber temperature controlling point, point for measuring temperature, control point, alarm point are as follows: temperature temperature controlling point: 1, temperature homogeneity point for measuring temperature: 4,8 of warm area monitoring points, exhaust outlet point for measuring temperature: 2, the circulating fan control point: 1, heating element heater control point: 6; Temperature controlling point is as closed-loop control usefulness, and the temperature homogeneity point for measuring temperature is as regulating temperature homogeneity adjusting usefulness in the hot processing chamber; Other control points detect as status of equipment and use.The temperature anomaly detecting element adopts 8 J type thermocouples in the fire-fighting system, and the temperature anomaly analysis meter is selected the PLC temperature detecting module, and executive component adopts electrically operated valve, and the pipeline of execution water spray and shower nozzle and discharge of wastewater pipeline all adopt stainless steel tube.
The utility model device combination layout is to be made of two heat-treatment furnaces, and each heat-treatment furnace can satisfy six layers of filament and move back and forth, and two are stacked, and single group hot processing chamber always is about: 10 meters; Height is approximately: 2.3 meters, approximately wide: 3.2 meters.
Single heat-treatment furnace technical indicator:
1, device name: pre-oxidation furnace; Specifications and models: RTXW-400
2, the quantity of warm area and mounting means: 2 warm areas, upper and lower stack is installed (complete machine)
3, circulated air is in fashion mode: by blowing to two ends in the middle of the body of heater
4, design maximum temperature: 350 ℃
5, typical serviceability temperature: 220 ~ 300 ℃
6, mode of heating: electrical heating
7, effective warm area length: 8000mm; Body of heater entire length: 10m
8, the temperature homogeneity in effective warm area: ± 1.5 ℃
9, heating rate: 2～3 ℃/min under empty fire bars spare
10, circulation wind speed: 3-4.5m/s in effective warm area
11, fresh air inlet quantity and position
12, exhaust outlet quantity and position
13, bundle channel effective width: 400mm
14, bundle channel interlamellar spacing: 200mm
15, bundle channel quantity: 6 of each warm areas
16, body of heater filament mouth height adjustment range: 0-50mm
17, filter
18, fire-fighting system
Type of drive: electronic;
19, surface temperature rise: with respect to indoor temperature, its surface temperature rise is less than 25 ℃; The sealing surface place surface temperature that door, access door, tow import and export are installed should be lower than 80 ℃, and is provided with the high temperature alarming sign.
20, single hot processing chamber installed power: 220KW
During hot air circulating system work, circulated air is sent into the wind path distributor by circulating fan, and the gas that enters respectively left and right hot processing chamber after the shunting enters the chamber fairing, finishes separately cyclic process; Circulated air is behind over commutation, and layering enters half side hot processing chamber; And to the both sides level run and after adding thermal fiber, after the hot processing chamber port enters gas and goes out the chamber reflux, have two road gases after return valve is regulated, to enter return air channel, there is one road gas directly to enter return air channel.Also have gas seldom to enter the waste gas transition chamber, drain in the toxic emission passage by the drainage blower fan; Demarcate new wind and follow circulated air to mix with another half side circulated air together by after the filter filtration by the additional mouth of new wind, enter again circulating fan after the heater via heating; Send into again the wind path distributor by centrifugal blower, finish a periodic duty.
Above-described embodiment only is better embodiment of the present utility model, and in addition, the utility model can also have other implementations.Need to prove, under the prerequisite that does not break away from the utility model design, any apparent improvement and modification all should fall within the protection domain of the present utility model.
Claims (13)
1. carbon fiber pre-oxidation furnace, it is characterized in that: have heat-treatment furnace, body of heater is formed by the heat-treatment furnace Juxtaposition and Superimposition; Each heat-treatment furnace all has left heat treatment cavity, right heat treatment cavity and middle heating cavity, its left hot processing chamber body and right heat treatment cavity are symmetrical structure, be bolted connection between each cavity, left heat treatment cavity and the external end of right hot processing chamber are provided with the multi-layer fiber tow and import and export, and every layer of fibre bundle Import ﹠ Export Department is provided with waste gas transition chamber and cavity sealing regulating; Be provided with hot air circulating system in each heat-treatment furnace, described hot air circulating system circulated air is in fashion mode by blowing to two ends in the middle of the body of heater, described hot air circulating system comprises the wind path distributor that is installed in the middle heating cavity, the gas that the wind path distributor connects respectively left heat treatment cavity and right heat treatment cavity the inner enters the chamber fairing, the external port place of left heat treatment cavity and right heat treatment cavity is connected with respectively gas and goes out the chamber reflux, each gas goes out chamber reflux outlet and is divided into three the tunnel, the first via is divided into two-way and is connected to return air channel after return valve is regulated, the second the tunnel is directly connected to return air channel, Third Road is connected to the waste gas transition chamber, the waste gas transition chamber is connected to the toxic emission passage by the drainage blower fan, return air channel is provided with new wind and replenishes mouth, by being connected to circulating fan behind filter and the heater, circulating fan was connected to the wind path distributor after the return air channel of left heat treatment cavity and right heat treatment cavity merged; Each heat-treatment furnace has temperature control system alone, and described temperature control system comprises temperature controller, power control component, temperature-measuring element and circuit protection system; Each heat-treatment furnace has alone fire-fighting system, and described fire-fighting system comprises the temperature anomaly detecting element, and the temperature anomaly analysis meter also has pipeline and shower nozzle and the discharge of wastewater pipeline of carrying out water spray; Each heat-treatment furnace all has five access doors and an access hole.
2. carbon fiber pre-oxidation furnace according to claim 1 is characterized in that: all the heat treatment cavity inside in the described heat-treatment furnace all adopt stainless steel or carbon steel tube material to be welded, and comprise the air channel in the heat treatment cavity, air-duct adjusting device; The framework of each cavity mainly adopts carbon steel material, and square tube and angle steel welding are assembled, and antirust processing is all taked on the surface.
3. carbon fiber pre-oxidation furnace according to claim 1, it is characterized in that: described cavity sealing regulating is shutter, can up-down adjustment, an expansible when wearing thread is conveniently worn silk; And cavity sealing regulating and the face that tow might contact, all polish to surface roughness be Ra=0.8 μ m, guarantee that tow can not produce to hang a silk phenomenon in heat treatment process; The cavity sealing regulating can be closed when equipment normally moved, and fibre bundle reduces thermal runaway as far as possible and external air enters in the situation that do not touch, and promotes hot processing chamber to work under slight positive pressure state.
4. carbon fiber pre-oxidation furnace according to claim 1, it is characterized in that: the thermodynamic material of each heat-treatment furnace is all selected fibrous material, and the thermal conductivity factor that it is extremely low and unit weight have reduced weight and the energy consumption of equipment, reduce the equipment surface temperature, simultaneously without any pernicious gas volatilization; Fibrous material is successively laid with the top in inner each process chamber bottom, and every layer gap staggers, and is routed to certain altitude, is compacted to desired height with interior thorax plate again, and make being compressed to of the thickness of anti-the material original 80%; Each process chamber side refractory material then adopts modularization assemble, the method that dislocation is laid, each fibre module has carried out compression to be processed, and makes its filling be full of reality, after completing also with interior thorax plate compression; Fitting surface at left process chamber and heating chamber, be filled with the one layer of heat preservation cotton, make being partially embedded in the cleaved facet of its adjacent inwall and housing, the centre bloats, then the two sides combines compression, the anti-material that guarantees fitting surface is filled and is full of reality, avoids the loss of heat, has also guaranteed the global consistency of heating chamber in the body of heater.
5. carbon fiber pre-oxidation furnace according to claim 1, it is characterized in that: in the described hot air circulating system, circulated air is in fashion mode by blowing to two ends in the middle of the body of heater, the wind path distributor is a pair of deep bead that becomes angle with the heating chamber axis, make circulating fan blow into the wind that comes and be divided into uniformly two parts, enter respectively left and right heat treatment cavity, it can be assigned to wind in the left and right heat treatment cavity, and the change wind direction is blown into its level.
6. carbon fiber pre-oxidation furnace according to claim 1, it is characterized in that: in the described hot air circulating system, it is six rib pipe airstream deflectors that gas enters the chamber fairing, this device is comprised of two parts, a part is air uniform plate, having uniform small pores, make the hot blast of coming from the wind path distributor, is equally distributed in the disconnected cross section of heat treatment cavity; Another part is six rib conduits, and the even hot blast of coming from air uniform plate is carried out guide effect, makes the hot processing chamber that is blown into of hot blast level; Have slot in the design of six rib rear end of conduit, air uniform plate is inserted in the slot, becomes Demountable, and cleaning, the replacing be convenient in the future are convenient; The Main Function that gas enters the chamber fairing is the left and right hot processing chamber that blows into that makes the even level of stratification of wind that is blown into, realizes shunting and rectification to hot-air.
7. carbon fiber pre-oxidation furnace according to claim 1, it is characterized in that: in the described hot air circulating system, it is that one group of uncovered can of seven rectangles one side forms that gas goes out the chamber reflux, single gas goes out the chamber reflux and is comprised of two parts, a part is homogenating plate, near heat treatment cavity one side, have non-homogeneous aperture, mesh vertically evenly distributes, and cross direction profiles is by dredging to close, and the return air plate hole is dredged the close return air channel of an end, the end of Kong Mi is away from return air channel, another part is the uncovered can of one side, and open face is connected with return air channel, the hot blast of coming from the heat treatment cavity, according to importing return air channel behind the rule inflow can, this design is in order to guarantee that hot blast can stablize the return air channel that enters smoothly, to have ensured wind speed stability and the uniformity of cavity, realizing good temperature homogeneity.
8. carbon fiber pre-oxidation furnace according to claim 1, it is characterized in that: in the described hot air circulating system, return valve is installed in the return air channel of side, two return valves control respectively three layers of return air and in three layers of return air, bottom return air directly enters the uneasy dress of return air channel control valve; The purpose of two return valves of design be to control in the hot processing chamber upper three layers with in three layers return air amount, the difference of return air amount must cause the up and down difference of temperature, and the return valve of being controlled by system is the inhomogeneity key that guarantees whole heat treatment cavity temperature.
9. carbon fiber pre-oxidation furnace according to claim 1, it is characterized in that: in the described hot air circulating system, filter is formed by the anticorrosion stainless steel cloth processing and fabricating of twice, and dredge in the anterior layer hole, rear layer Kong Mi; Its major function is that the fracture of wire in the circulated air is filtered, and can regularly change online.
10. carbon fiber pre-oxidation furnace according to claim 1, it is characterized in that: in the described hot air circulating system, return air channel is designed with in addition new wind and replenishes mouth, new wind replenishes on the mouth the manual adjustments valve, can carry out the adjusting of new wind magnitude of recruitment, with the oxygen that is consumed during filament pre-oxidation in the supplementary furnace.
11. carbon fiber pre-oxidation furnace according to claim 1, it is characterized in that: in the described hot air circulating system, the external end of left and right hot processing chamber is designed with the waste gas transition chamber, be equipped with the toxic emission passage on the left and right heat treatment cavity, control valve is housed on the passage, and the waste gas that discharges in the preoxidation process can be discharged in the pipeline of exhaust-gas treatment by this passage.
12. carbon fiber pre-oxidation furnace according to claim 1, it is characterized in that: in the described temperature control system, temperature control instrument is selected the PLC temperature control module, has pid parameter from adjusting and artificial revision function, have simultaneously overtemperature, owe warm, disconnected even power alarm defencive function, overtemperature alarm is in case produce, and system can cut off electrical source of power immediately, product burning when preventing that temperature control system lost efficacy; Executive component replaces traditional A.C. contactor control with advanced person's SCR phase shift technology, realizes soft contact control, accurate, reliable, long service life; Because voltage is linear output continuously, thereby it is level and smooth stable to heat up, improved the over control that causes because of PID, improved the control stability of temperature, overcome the power stage fluctuation problem that the zero passage mode causes, cut off immediately heating power supply in case every group of heater arranges the burning of 3 surface loading temperature monitoring thermocouple heaters; The furnace chamber temperature element adopts J calibration temperature-measuring heat couple and temperature-controlling thermal couple, and K calibration thermocouple is adopted in the heter temperature monitoring, and whole system consists of a supervisory system of closed, thereby realizes the in good time closed-loop control of temperature and supervision; In order to detect the uniformity of adjusting temperature, each hot processing chamber temperature controlling point, point for measuring temperature, control point, alarm point magnitude setting are as follows: temperature temperature controlling point: 1, temperature homogeneity point for measuring temperature: 4,8 of warm area monitoring points, exhaust outlet point for measuring temperature: 2, the circulating fan control point: 1, heating element heater control point: 6; Temperature controlling point is as closed-loop control usefulness, and the temperature homogeneity point for measuring temperature is as regulating temperature homogeneity adjusting usefulness in the hot processing chamber; Other control points detect as status of equipment and use.
13. carbon fiber pre-oxidation furnace according to claim 1, it is characterized in that: the temperature anomaly detecting element adopts 8 J type thermocouples in the described fire-fighting system, the temperature anomaly analysis meter is selected the PLC temperature detecting module, executive component adopts electrically operated valve, and the pipeline of execution water spray and shower nozzle and discharge of wastewater pipeline all adopt stainless steel tube.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220296687 CN202913112U (en) | 2012-06-21 | 2012-06-21 | Carbon fiber pre-oxidation furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220296687 CN202913112U (en) | 2012-06-21 | 2012-06-21 | Carbon fiber pre-oxidation furnace |
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| CN202913112U true CN202913112U (en) | 2013-05-01 |
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| CN 201220296687 Withdrawn - After Issue CN202913112U (en) | 2012-06-21 | 2012-06-21 | Carbon fiber pre-oxidation furnace |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758270A (en) * | 2012-06-21 | 2012-10-31 | 合肥日新高温技术有限公司 | High-performance carbon fiber pre-oxidation furnace |
| CN109285921A (en) * | 2018-12-03 | 2019-01-29 | 乐山新天源太阳能科技有限公司 | Gas mixing homogenizer for the anti-PID equipment of solar battery |
| CN110578186A (en) * | 2019-09-18 | 2019-12-17 | 浙江精功科技股份有限公司 | Pre-oxidation furnace with end-to-end blowing structure |
| CN110578189A (en) * | 2019-09-18 | 2019-12-17 | 浙江精功科技股份有限公司 | Air return box for pre-oxidation furnace and pre-oxidation furnace |
| CN110670172A (en) * | 2019-09-19 | 2020-01-10 | 大同新成新材料股份有限公司 | Carbon fiber pre-oxidation processing device and method |
| CN114517343A (en) * | 2022-03-11 | 2022-05-20 | 新创碳谷控股有限公司 | Carbon fiber pre-oxidation furnace with uniform temperature field |
| CN117822149A (en) * | 2024-03-06 | 2024-04-05 | 建中商云(上海)碳素工程有限公司 | Carbon fiber preoxidation equipment |
-
2012
- 2012-06-21 CN CN 201220296687 patent/CN202913112U/en not_active Withdrawn - After Issue
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758270A (en) * | 2012-06-21 | 2012-10-31 | 合肥日新高温技术有限公司 | High-performance carbon fiber pre-oxidation furnace |
| CN102758270B (en) * | 2012-06-21 | 2014-05-21 | 合肥日新高温技术有限公司 | High-performance carbon fiber pre-oxidation furnace |
| CN109285921A (en) * | 2018-12-03 | 2019-01-29 | 乐山新天源太阳能科技有限公司 | Gas mixing homogenizer for the anti-PID equipment of solar battery |
| CN109285921B (en) * | 2018-12-03 | 2024-01-26 | 乐山新天源太阳能科技有限公司 | Gas mixing and homogenizing device for PID (potential induced degradation) resistant equipment of solar cell |
| CN110578186A (en) * | 2019-09-18 | 2019-12-17 | 浙江精功科技股份有限公司 | Pre-oxidation furnace with end-to-end blowing structure |
| CN110578189A (en) * | 2019-09-18 | 2019-12-17 | 浙江精功科技股份有限公司 | Air return box for pre-oxidation furnace and pre-oxidation furnace |
| CN110578189B (en) * | 2019-09-18 | 2024-03-15 | 浙江精工集成科技股份有限公司 | Return air case and pre-oxidation stove for pre-oxidation stove |
| CN110578186B (en) * | 2019-09-18 | 2024-03-15 | 浙江精工集成科技股份有限公司 | Pre-oxidation furnace with end-to-end blowing structure |
| CN110670172A (en) * | 2019-09-19 | 2020-01-10 | 大同新成新材料股份有限公司 | Carbon fiber pre-oxidation processing device and method |
| CN110670172B (en) * | 2019-09-19 | 2022-06-07 | 大同新成新材料股份有限公司 | Carbon fiber pre-oxidation processing device and method |
| CN114517343A (en) * | 2022-03-11 | 2022-05-20 | 新创碳谷控股有限公司 | Carbon fiber pre-oxidation furnace with uniform temperature field |
| CN117822149A (en) * | 2024-03-06 | 2024-04-05 | 建中商云(上海)碳素工程有限公司 | Carbon fiber preoxidation equipment |
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