CN116592609B - Gas circulation control system and method for carbon fiber drying furnace - Google Patents
Gas circulation control system and method for carbon fiber drying furnace Download PDFInfo
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- CN116592609B CN116592609B CN202310885068.1A CN202310885068A CN116592609B CN 116592609 B CN116592609 B CN 116592609B CN 202310885068 A CN202310885068 A CN 202310885068A CN 116592609 B CN116592609 B CN 116592609B
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 45
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 45
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000001035 drying Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000009826 distribution Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 abstract description 14
- 238000007664 blowing Methods 0.000 abstract description 13
- 230000015572 biosynthetic process Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000009827 uniform distribution Methods 0.000 abstract description 2
- 238000004513 sizing Methods 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The utility model relates to the technical field of carbon fiber manufacturing, in particular to a gas circulation control system and method of a carbon fiber drying furnace, wherein the system comprises the following components: the furnace body is internally provided with a plurality of in-furnace heaters which are arranged along the length direction of the furnace body; the hot air circulation pipeline comprises a fan connected with the middle part of the furnace body in the length direction, a first pipeline and a second pipeline, wherein the first pipeline and the second pipeline are communicated with the fan; wherein, a plurality of temperature sensors in the furnace are arranged in the furnace body along the length direction of the furnace body, and the arrangement of the temperature sensors in the furnace corresponds to the heater so as to control the uniform distribution of heat in the furnace body. According to the utility model, the circulating hot air blows from the two ends towards the middle, so that the temperature difference between the two ends in the blowing direction is reduced, the influence of continuous blowing in one direction of wind force on the formation of the protective film can be reduced, and the uniformity of the formation of the protective film is improved.
Description
Technical Field
The utility model relates to the technical field of carbon fiber manufacturing, in particular to a gas circulation control system and method of a carbon fiber drying furnace.
Background
In the carbon fiber production process, in order to obtain better processability on the surface of the carbon fiber, the carbon fiber needs to be subjected to sizing drying treatment to form a layer of sizing agent protective film on the surface of the carbon fiber, however, how to ensure the quality control of the protective film in the drying process after the carbon fiber is sized becomes a problem to be solved urgently at present;
in the prior art, as disclosed in the chinese patent No. CN207313919U, 5/4/2018, a carbon fiber sizing and drying device is disclosed, wherein a furnace body is a sealed drying chamber formed by buckling a left side bin and a right side bin, a hot air inlet and a hot air outlet are respectively formed in the left side bin and the right side bin, the sized carbon fiber passing through the furnace body is dried by blowing hot air from the right side bin to the left side bin, and in order to reduce the temperature difference at two ends of the furnace body in the hot air blowing process, a plurality of radiation heaters are arranged in an aluminum ladder, and the temperature of the heaters is set in a gradient manner from low to high;
however, the inventors found that the blowing from one end of the furnace body to the other end affects the uniformity of the protective film, resulting in uneven thickness of the protective film.
Disclosure of Invention
In view of at least one of the above technical problems, the utility model provides a gas circulation control system and method for a carbon fiber drying furnace, which adopts the improvement of an air duct in a furnace body to improve the uniformity of a protective film after sizing and drying of carbon fibers.
According to a first aspect of the present utility model, there is provided a carbon fiber drying oven gas circulation control system comprising:
the furnace body is internally provided with a plurality of in-furnace heaters which are arranged along the length direction of the furnace body;
the hot air circulation pipeline comprises a fan connected with the middle part of the furnace body in the length direction, and a first pipeline and a second pipeline which are communicated with the fan, wherein the other end of the first pipeline is communicated with one end of the furnace body in the length direction, and the second pipeline is communicated with the other end of the furnace body in the length direction;
wherein, a plurality of temperature sensors in the furnace are arranged in the furnace body along the length direction, and the arrangement of the temperature sensors in the furnace corresponds to the heater so as to control the heat distribution in the furnace body to be uniform.
Further, the first pipeline and the second pipeline are provided with a pipeline heater and a pipeline temperature sensor, and the pipeline heater is configured to be opened when the difference between the temperature detected by the temperature sensor in the furnace and the set temperature in the furnace is smaller than zero and is closed when the difference is larger than or equal to zero.
Further, a pressure sensor is further arranged in the furnace body, when the pressure detected by the pressure sensor is larger than a safety value, the heater in the furnace and the pipeline heater stop heating, and the wind speed of the fan is increased.
Further, a filter is communicated with the fan.
Further, the filter further comprises a differential pressure sensor, and two ends of the differential pressure sensor are communicated with two end pipelines of the filter.
Further, an exhaust gas detector is further connected to the pipeline where the fan is located, and the exhaust gas detector is used for extracting and measuring the content of harmful substances in the gas in the pipeline where the fan is located.
Further, a waste discharge valve and a fresh air inlet valve are further arranged on the pipeline where the fan is located.
Further, the first pipeline and the second pipeline are internally provided with a humidity sensor and a dehumidifier.
Further, the first pipeline and the second pipeline are respectively provided with a flow valve and a flowmeter, and the flowmeters are respectively arranged at the outlets of the first pipeline and the second pipeline.
According to a second aspect of the present utility model, there is also provided a carbon fiber drying furnace gas circulation control method applied to the carbon fiber drying furnace gas circulation control system according to any one of the first aspects, comprising the steps of:
starting a fan, conveying gas in the furnace body from the first pipeline and the second pipeline to two ends of the furnace body, returning the gas from the middle of the furnace body, and forming circulating air flow from two ends to the middle in the furnace body;
and monitoring temperature values of all positions in the furnace body, wherein each temperature sensor in the furnace corresponds to a region in the furnace body with a set length, and when the temperature detected by the temperature sensor in the furnace is smaller than the set value, starting the heater in the furnace at the corresponding position, and otherwise, closing the heater.
The beneficial effects of the utility model are as follows: according to the utility model, through improving the circulating hot air passage in the furnace body, circulating hot air is blown from two ends to the middle, compared with the existing unidirectional hot air blowing, the temperature difference at two ends in the blowing direction is reduced, and when carbon fibers pass through the furnace body, the received wind direction is blown in one direction and then in the opposite direction, compared with the prior art, the influence of continuous unidirectional blowing of wind force on the formation of a protective film can be reduced, in addition, through the arrangement of a plurality of in-furnace heaters and a plurality of in-furnace temperature sensors, the local temperature control of different areas can be realized, compared with the prior art, the control of the temperature in the furnace body is more accurate, the uniformity of heat distribution in the furnace is further improved, and the uniformity of the formation of the protective film is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic diagram of a gas circulation control system of a carbon fiber drying oven according to an embodiment of the present utility model;
FIG. 2 is a schematic view of the flow direction of circulating hot air in a furnace body according to an embodiment of the present utility model;
FIG. 3 is a flow chart showing the steps of a method for controlling gas circulation in a carbon fiber drying furnace according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The gas circulation control system of the carbon fiber drying furnace shown in fig. 1 comprises a furnace body 1 and a hot air circulation pipeline 3, wherein:
the furnace body 1 is internally provided with a plurality of furnace heaters 2, and the furnace heaters 2 are arranged along the length direction of the furnace body 1; in the embodiment of the present utility model, two ends of the furnace body 1 in the length direction have gaps through which the sized carbon fibers pass, and of course, in order to prevent leakage of gas in the furnace body 1, in the embodiment of the present utility model, gas sealing devices may also be disposed at two ends of the furnace body 1 in the length direction, where the gas sealing devices are used to prevent leakage of gas, and the gas sealing devices are in the prior art and are not described herein;
the hot air circulation pipeline 3 comprises a fan 30 connected with the middle part of the furnace body 1 in the length direction, a first pipeline 31 and a second pipeline 32 which are communicated with the fan 30, the other end of the first pipeline 31 is communicated with one end of the furnace body 1 in the length direction, and the second pipeline 32 is communicated with the other end of the furnace body 1 in the length direction; it should be noted that, the first pipeline 31 and the second pipeline 32 may be directly connected to the furnace body 1 while avoiding the gaps between the two ends of the furnace body 1, or may be configured such that the side walls near the two ends of the furnace body 1 are in communication with the inside of the furnace body 1 as shown in fig. 2; referring to fig. 2, in the embodiment of the present utility model, the flow direction of the gas is blown from the fan 30 to the first pipeline 31 and the second pipeline 32, and then reaches the two end positions of the furnace body 1 through the first pipeline 31 and the second pipeline 32, and then the circulating air flow is collected from the two ends of the furnace body 1 towards the middle, and finally is extracted by the fan 30 and flows circularly towards the first pipeline 31 and the second pipeline 32;
referring to the schematic diagram in fig. 2, the two-dot chain line indicates carbon fibers, in one embodiment of the present utility model, the carbon fibers move from left to right, and in the moving process, hot air blowing towards the right side is received first, and because the moving direction of the carbon fibers is the same as the moving direction of left circulating hot air, the influence of wind force on the form of the sizing agent during curing can be reduced, and when the carbon fibers pass through half of the length direction of the furnace body 1, the curing of the sizing agent is completed, and reaches the right side of the furnace body 1, and the direction of the circulating hot air received at the moment is towards the left side, and because the opposite direction to the moving direction of the carbon fibers, the opposite speed difference is larger, and the larger wind force received on the carbon fibers can offset the uneven phenomenon caused by wind force received by the sizing agent during forming the protective film; by the circulating hot air mode from the two ends to the middle, the influence of wind power on the form of the sizing agent in the curing process of forming the protective film in the prior art is overcome, and meanwhile, the temperature and humidity difference caused by unidirectional blowing is reduced;
in addition, since the heat exchange causes a difference in temperature during the circulating wind flow, but such a difference in temperature may be different due to the wind force, the state of sizing agent on the carbon fiber, the heaters having different heating gradients provided in the prior art cannot satisfy various situations, and in the embodiment of the present utility model, a plurality of in-furnace temperature sensors 11 are arranged in the furnace body 1 along the length direction thereof, and the arrangement of the in-furnace temperature sensors 11 corresponds to the heaters to control the uniform heat distribution in the furnace body 1. In this way, the area control in the length direction in the furnace body 1 can be realized through the plurality of temperature sensors 11 in the furnace, and more accurate temperature control can be realized, so that the heat distribution of the temperature in the furnace is more uniform.
In the above embodiment, by improving the internal circulation hot air passage of the furnace body 1, the circulating hot air is blown from the two ends towards the middle, compared with the existing unidirectional hot air blowing, the temperature difference at the two ends of the blowing direction is reduced, and when the carbon fiber passes through the furnace body 1, the received wind direction is firstly directed towards one direction and then is blown towards the opposite direction, compared with the prior art, the influence of continuous unidirectional blowing of wind force on the formation of the protective film can be reduced, in addition, by the arrangement of a plurality of furnace heaters 2 and a plurality of furnace temperature sensors 11, the local temperature control of different areas can be realized, compared with the prior art, the control of the internal temperature of the furnace body 1 is more accurate, and the uniformity of the heat distribution in the furnace is further improved, thereby improving the uniformity of the formation of the protective film.
In order to further improve the accuracy of temperature control based on the above embodiment, please continue to refer to fig. 1, in the embodiment of the present utility model, the first pipeline 31 and the second pipeline 32 each have a pipeline heater 31a and a pipeline temperature sensor 31b, and the pipeline heater 31a is configured to be turned on when the difference between the temperature detected by the temperature sensor 11 in the furnace and the set temperature in the furnace is less than zero and is more than or equal to zero. By the arrangement, the temperature of the circulating hot air passing through the first pipeline 31 and the second pipeline 32 is also kept within a precise temperature range, so that the influence on the overall temperature in the furnace body 1 is further reduced; it is also noted here that in the embodiment of the present utility model, the in-furnace heater 2 and the line heater 31a may be plate heaters or heater wires or the like.
In the embodiment of the utility model, in order to ensure the safety in the furnace, a pressure sensor is further arranged in the furnace body 1, and when the pressure detected by the pressure sensor is greater than a safety value, the heater 2 in the furnace and the pipeline heater 31a stop heating, and the wind speed of the fan 30 is increased. Through pressure sensor's setting, can monitor the pressure in the furnace body 1 to when pressure sensor's measurement value is greater than the safe value, the system can start cooling pressure release function, through the heating of stopping the heater, and improve the wind speed, can realize the cooling to the stove in, reduce the emergence of incident.
In the embodiment of the present utility model, in order to collect waste materials such as particulate matters and the like generated during the drying process, as shown in fig. 1, a filter 33 is further connected to the fan 30. In some embodiments of the present utility model, the filter 33 is disposed at the front end of the blower 30, and thus, it can filter impurities in the circulated air and protect the blower 30. In addition, in order to replace the filter screen in the filter 33 in time, in the embodiment of the present utility model, a differential pressure sensor 33a is further included, and two ends of the differential pressure sensor 33a are in pipeline communication with two ends of the filter 33. In the embodiment of the present utility model, the differential pressure sensor 33a is used for detecting the air pressure at two sides of the filter screen of the filter 33, if the actual value is greater than the safety value, the filter screen of the filter 33 is blocked, the fan 30 needs to be closed to clean or replace the filter screen, and it should be noted that in the embodiment of the present utility model, the principle that the fan 30 is heated first and then the heater is stopped and the fan 30 stops to ensure safety is followed.
In the embodiment of the present utility model, in order to control the concentration of the exhaust gas in the drying furnace within a certain range, please continue to refer to fig. 1, an exhaust gas detector 34 is further connected to the pipeline where the blower 30 is located, for extracting and measuring the content of harmful substances in the gas in the pipeline where the blower 30 is located. In the embodiment of the present utility model, the exhaust gas extraction measurement is the prior art, and will not be described in detail herein, and the concentration of the harmful exhaust gas in the furnace body 1 is determined by extracting and detecting the harmful exhaust gas, so that the content of the exhaust gas can be detected; in the embodiment of the present utility model, in order to control the concentration of the exhaust gas, as shown in fig. 1, a waste valve 35 and a fresh air intake valve 36 are further disposed on the pipeline where the fan 30 is located. In the specific implementation, if the content of the exhaust gas detected by the exhaust gas detector 34 is greater than a set threshold value, the exhaust valve 35 is opened, so that part of the exhaust gas in the circulating pipeline is discharged from the exhaust valve 35 to the incinerator, and meanwhile, the fresh air introducing valve 36 is opened, so that the outside clean air enters the pipeline, and finally, the exhaust gas is discharged in the same amount as the fresh air, so that the concentration of the harmful gas in the furnace body 1 can be ensured to be kept in a safer level; in addition, it should be noted that in the embodiment of the present utility model, the introduced fresh air needs to be preheated, so that the temperature of the fresh air is close to the temperature in the pipeline, and the influence of the introduced fresh air on the temperature of the circulating hot air is reduced.
On the basis of the above embodiment, in the embodiment of the present utility model, since some moisture is generated in the curing process of the sizing agent after sizing, the moisture evaporation may cause the increase of the humidity in the pipeline, and in order to overcome the above problem, in the embodiment of the present utility model, both the first pipeline 31 and the second pipeline 32 are provided with the humidity sensor 37 and the dehumidifier 37a. In the embodiment of the utility model, a humidity sensor 37 arranged on a pipeline monitors the humidity H of circulating gas in real time, the actual detection value is H1, the set value is H2, a humidity difference value delta H=H2-H1, delta H > 0 starts a dehumidifier 37a, the output power C of the dehumidifier 37a is regulated according to the humidity difference value delta H until delta H is less than or equal to 0, and the heater is turned off; the heater output power F and the humidity difference delta H are in a functional relation with the change of time t, and the expression is as follows:
wherein K is P For system parameters, tt is the integration time constant of the integration control, obtained by system tuning. The formula is essentially PID control regulation, the first half part is proportional control, the magnitude of the dehumidifier power control quantity is controlled according to the error between the current actual humidity and the target setting, but when the actual humidity is close to the target setting, the smaller the difference between the actual value and the target value is, the dehumidifier power control quantity is also reduced, when the control quantity is smaller than a certain value, the dehumidifier power is insufficient to reduce the humidity change and only keep the existing humidity, the actual humidity can not reach the target setting value, the steady-state error occurs in the system, the error can not be eliminated by proportional control over time, so the integral control of the second half part is introduced, the integral control integrates the steady-state error and directly acts on the control quantity, thereby eliminating the steady-state error, tt in the formula is the integral time constant of the integral control, the greater Tt is mainly used for determining the intensity of the integral control effect, and the weaker the integral effect is, otherwise the stronger the constant is obtained through the actual system regulation.
In the embodiment of the present utility model, in order to further control the uniform distribution of the energy in the furnace body 1, the flow rate in the circulation line is also controlled, and as shown in fig. 1, the first line 31 and the second line 32 are each provided with a flow valve 38 and a flow meter 39, and the flow meters 39 are respectively disposed at the outlets of the first line 31 and the second line 32. In the specific implementation, it is determined whether the designed circulation airflow flow rate is reached or not based on the measurement of the flowmeter 39, and if the flow rate is small, the opening degree of the flow valve 38 is increased, and conversely, decreased.
In the embodiment of the utility model, a method for controlling gas circulation of a carbon fiber drying furnace is also provided, as shown in fig. 3, and the method is applied to the gas circulation control system of the carbon fiber drying furnace, and comprises the following steps:
s10: starting a fan 30, conveying gas in the furnace body 1 to two ends of the furnace body 1 from a first pipeline 31 and a second pipeline 32, returning the gas from the middle of the furnace body 1, and forming circulating air flow from two ends to the middle in the furnace body 1;
s20: and monitoring the temperature values of all the positions in the furnace body 1, wherein each temperature sensor 11 in the furnace corresponds to a region in the furnace body 1 with a set length, and when the temperature detected by the temperature sensor 11 in the furnace is smaller than the set value, the heater 2 in the furnace at the corresponding position is started, and otherwise, the heater is closed.
On the basis of the above embodiment, the pressure difference of the filter 33, the pressure in the furnace body 1, the concentration of the exhaust gas, the humidity in the circulating pipeline and the flow are monitored in the embodiment of the utility model, so that the uniform heat distribution in the furnace body 1 is finally achieved, the curing efficiency of the slurry attached to the surface of the carbon fiber is higher, and the forming effect of the protective film is better.
It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (10)
1. A carbon fiber drying oven gas circulation control system, comprising:
the furnace body is internally provided with a plurality of in-furnace heaters which are arranged along the length direction of the furnace body; the hot air circulation pipeline comprises a fan connected with the middle part of the furnace body in the length direction, a first pipeline and a second pipeline, wherein the first pipeline and the second pipeline are communicated with the fan;
wherein, a plurality of temperature sensors in the furnace are arranged in the furnace body along the length direction, and the arrangement of the temperature sensors in the furnace corresponds to the heater so as to control the heat distribution in the furnace body to be uniform.
2. The carbon fiber drying oven gas circulation control system of claim 1, wherein the first and second conduits each have a conduit heater and a conduit temperature sensor therein, the conduit heater being configured to be turned on when a difference between a temperature detected by the conduit temperature sensor and an in-oven set temperature is less than zero and turned off when the difference is greater than or equal to zero.
3. The carbon fiber drying oven gas circulation control system according to claim 2, wherein the oven body further has a pressure sensor therein, and when the pressure detected by the pressure sensor is greater than a safety value, the in-oven heater and the pipeline heater stop heating, and the fan wind speed increases.
4. The carbon fiber drying oven gas circulation control system of claim 1, wherein a filter is further connected to the blower.
5. The carbon fiber drying oven gas circulation control system of claim 4, further comprising a differential pressure sensor having two ends in line communication with the two ends of the filter.
6. The gas circulation control system of the carbon fiber drying furnace according to claim 1, wherein the pipeline where the fan is located is further connected with an exhaust gas detector for extracting and measuring the content of harmful substances in the gas in the pipeline where the fan is located.
7. The gas circulation control system of the carbon fiber drying furnace according to claim 6, wherein a waste valve and a fresh air inlet valve are further arranged on a pipeline where the fan is located.
8. The carbon fiber drying oven gas circulation control system of claim 1, wherein the first and second conduits each have a humidity sensor and a dehumidifier therein.
9. The carbon fiber drying oven gas circulation control system of claim 1, wherein the first and second conduits each have a flow valve and a flow meter disposed at the outlet of the first and second conduits, respectively.
10. A carbon fiber drying furnace gas circulation control method, characterized by being applied to the carbon fiber drying furnace gas circulation control system according to any one of claims 1 to 9, comprising the steps of:
starting a fan, conveying gas in the furnace body from the first pipeline and the second pipeline to two ends of the furnace body, returning the gas from the middle of the furnace body, and forming circulating air flow from two ends to the middle in the furnace body;
and monitoring temperature values of all positions in the furnace body, wherein each temperature sensor in the furnace corresponds to a region in the furnace body with a set length, and when the temperature detected by the temperature sensor in the furnace is smaller than the set value, starting the heater in the furnace at the corresponding position, and otherwise, closing the heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310885068.1A CN116592609B (en) | 2023-07-19 | 2023-07-19 | Gas circulation control system and method for carbon fiber drying furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310885068.1A CN116592609B (en) | 2023-07-19 | 2023-07-19 | Gas circulation control system and method for carbon fiber drying furnace |
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| CN116592609A CN116592609A (en) | 2023-08-15 |
| CN116592609B true CN116592609B (en) | 2024-01-30 |
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| CN206001898U (en) * | 2016-08-11 | 2017-03-08 | 江苏金色工业炉股份有限公司 | A kind of meshbeltfurnace heating system |
| CN207313919U (en) * | 2017-09-18 | 2018-05-04 | 中安信科技有限公司 | Carbon fiber starching drying device |
| CN214503752U (en) * | 2020-12-04 | 2021-10-26 | 浙江菲达环保科技股份有限公司 | Wide temperature range atmosphere adjustable dust specific resistance testing arrangement |
| CN114481371A (en) * | 2022-02-11 | 2022-05-13 | 新创碳谷控股有限公司 | Lateral blowing oxidation furnace device |
| CN116202307A (en) * | 2023-02-27 | 2023-06-02 | 山西钢科碳材料有限公司 | Drying device for carbon fiber after sizing and control method thereof |
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2023
- 2023-07-19 CN CN202310885068.1A patent/CN116592609B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206001898U (en) * | 2016-08-11 | 2017-03-08 | 江苏金色工业炉股份有限公司 | A kind of meshbeltfurnace heating system |
| CN207313919U (en) * | 2017-09-18 | 2018-05-04 | 中安信科技有限公司 | Carbon fiber starching drying device |
| CN214503752U (en) * | 2020-12-04 | 2021-10-26 | 浙江菲达环保科技股份有限公司 | Wide temperature range atmosphere adjustable dust specific resistance testing arrangement |
| CN114481371A (en) * | 2022-02-11 | 2022-05-13 | 新创碳谷控股有限公司 | Lateral blowing oxidation furnace device |
| CN116202307A (en) * | 2023-02-27 | 2023-06-02 | 山西钢科碳材料有限公司 | Drying device for carbon fiber after sizing and control method thereof |
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| CN116592609A (en) | 2023-08-15 |
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