Waste gas treatment system of carbon fiber production line and control device of waste gas treatment system

Abstract

The invention discloses a waste gas treatment system of a carbon fiber production line and a control device.The waste gas treatment system comprises a pre-oxidation furnace, a waste gas pipeline and an RTO, and waste gas generated in the carbon fiber production process enters the RTO through the waste gas pipeline to be incinerated; the RTO comprises a common RTO and a standby RTO; the heat exchange assembly is used for carrying out heat exchange treatment on tail gas exhausted after RTO incineration is completed; the heat exchange assembly comprises a first heat exchange assembly and a second heat exchange assembly which are in one-to-one correspondence with the common RTO and the standby RTO; and the cold air assembly controllably communicates with the first heat exchange assembly or the second heat exchange assembly, and cold air is introduced into the heat exchange assemblies and exchanges heat with the tail gas. According to the waste gas treatment system and the control device of the waste gas treatment system, the continuity and stability of a carbon fiber production line can be guaranteed, and the oxidation effect of carbon fibers can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste gas treatment, and specifically relates to a waste gas treatment system for a carbon fiber production line and its control device. Background Art

[0002] Carbon fiber is a high-strength and high-modulus fiber with a carbon content of more than 90%. It has the best performance among mass-produced fiber materials, is the material with the highest strength that can be widely applied in engineering at present, has excellent physical and chemical properties, and has extensive applications in both military and civilian fields, and is known as the "black gold" of the 21st century.

[0003] However, a large amount of waste gas is generated during the production process of carbon fiber, including combustibles, toxic gases (hydrogen cyanide), and volatile organic compounds. Among them, volatile organic compounds (VOCs) are important precursors for the formation of secondary pollutants such as fine particulate matter (PM2.5) and ozone (O3), which in turn trigger atmospheric environmental problems such as haze and photochemical smog. Therefore, it must be treated before being discharged.

[0004] Traditional catalytic combustion is usually limited to treatment objects with large air volume, low content, and low concentration. However, high temperature and VOCs waste gas (volatile organic compounds) will damage the internal space of the equipment and pipelines, and there are high requirements for the equipment structure configuration and installation materials, etc.; and the caking of the flame arrester will affect the entire reaction process, and at the same time, it will also affect the alarm system and intelligent judgment and other adverse factors.

[0005] In view of this, the present invention is specifically proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a waste gas treatment system for a carbon fiber production line and its control device, which can treat the waste gas generated during the carbon fiber oxidation process, perform heat exchange treatment on the treated tail gas, and then discharge it, and control the waste gas treatment process to effectively reduce the combustible components in the tail gas, making it safer and more environmentally friendly.

[0007] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] In a first aspect of the present invention, a waste gas treatment system for a carbon fiber production line is provided, including: a pre-oxidation furnace, a waste gas pipeline, and an RTO. The waste gas generated during the carbon fiber production process enters the RTO through the waste gas pipeline for incineration treatment; the RTO includes a common RTO and a standby RTO.

[0009] Advantageously, setting a common RTO and a standby RTO can promptly switch to the standby RTO when the common RTO fails, ensuring the continuity and stability of the carbon fiber production line.

[0010] Further, the waste gas treatment system further includes: a heat exchange component for heat-exchanging the tail gas discharged after RTO incineration is completed;

[0011] The heat exchange component includes a first heat exchange component and a second heat exchange component corresponding one-to-one to the common RTO and the standby RTO;

[0012] A cold air component, the cold air component is controllably connected to the first heat exchange component or the second heat exchange component to introduce cold air into the heat exchange component for heat-exchanging with the tail gas.

[0013] Further, both the first heat exchange component and the second heat exchange component are provided with a primary heat exchange part, the cold air component includes a gas collection hood waste gas pipeline, and the gas collection hood waste gas pipeline is controllably connected to the primary heat exchange part of the first heat exchange component or the primary heat exchange part of the second heat exchange component to introduce the gas collection hood waste gas into the primary heat exchange part for primary heat-exchanging with the tail gas.

[0014] Further, both the first heat exchange component and the second heat exchange component are provided with a secondary heat exchange part, the cold air component includes a fresh air pipeline, and the fresh air pipeline is controllably connected to the secondary heat exchange part of the first heat exchange component or the secondary heat exchange part of the second heat exchange component to introduce fresh air into the secondary heat exchange part for secondary heat-exchanging with the tail gas.

[0015] Advantageously, the tail gas after RTO incineration is heat-exchanged twice through the heat exchange component, the temperature in the tail gas can be reduced to the lowest, and at the same time, the heat in the tail gas is reused.

[0016] Further, the waste gas treatment system further includes: an exhaust pipeline, the exhaust pipeline is controllably connected to the first heat exchange component and the second heat exchange component, and the heat-exchanged tail gas is discharged through the exhaust pipeline.

[0017] Further, the waste gas treatment system further includes: a hot fresh air pipeline, the hot fresh air pipeline is controllably connected to the first heat exchange component and the second heat exchange component, and the fresh air participating in the tail gas heat exchange is introduced into the pre-oxidation furnace through the hot fresh air pipeline.

[0018] Advantageously, the fresh air introduced into the heat exchange component through the fresh air pipeline becomes hot fresh air after heat exchange and returns to the pre-oxidation furnace through the hot fresh air pipeline, so that the heat in the tail gas can be reused again.

[0019] In the second aspect of the present invention, there is provided a control device for a waste gas treatment system of a carbon fiber production line, including:

[0020] A monitoring module for monitoring the pressure and / or the concentration of combustible gas in the waste gas treatment system and transmitting the monitored pressure and / or combustible gas concentration parameters to the analysis module;

[0021] The analysis module receives the pressure and / or combustible gas concentration parameters monitored and transmitted by the monitoring module, analyzes the obtained pressure and / or combustible gas concentration parameters, and transmits the analysis results to the adjustment module;

[0022] The adjustment module receives the analysis results of the analysis module and controls and adjusts the opening degree of the valve body on the corresponding pipeline and / or the air volume of the fan according to the analysis results.

[0023] Further, the monitoring module includes a first monitoring module, which is arranged on the exhaust gas pipeline in the exhaust gas treatment system and is used to monitor the concentration of combustible gas in the exhaust gas pipeline, and transmits the monitored combustible gas concentration parameters to the analysis module;

[0024] The analysis module receives the concentration parameters of the combustible gas monitored by the first monitoring module, compares them with the preset value, and transmits the comparison result to the adjustment module;

[0025] The adjustment module receives the comparison result of the analysis module and adjusts the frequency of the fan on the combustion-supporting air pipeline and / or the opening degree of the valve body on the natural gas pipeline according to the comparison result.

[0026] Further, the analysis module obtains the concentration parameters of the combustible gas monitored by the first monitoring module and transmits the concentration parameters to the judgment module set in the analysis module;

[0027] The judgment module receives the concentration parameters transmitted by the analysis module, judges that the concentration of the combustible gas monitored by the first monitoring module is lower than the preset value, and transmits the judgment result to the adjustment module;

[0028] The adjustment module receives the judgment result of the judgment module and controls and adjusts to reduce the frequency of the fan on the combustion-supporting air pipeline and / or reduce the opening degree of the valve body on the natural gas pipeline according to the judgment result.

[0029] Advantageously, by monitoring the concentration of combustible gas in the exhaust gas, the amounts of combustion-supporting air and natural gas in the exhaust gas treatment system can be appropriately adjusted, the incineration efficiency of the exhaust gas can be improved, and the exhaust gas can be incinerated more fully.

[0030] Further, the monitoring module includes a second monitoring module, which is arranged on the exhaust gas pipeline in the exhaust gas treatment system and is used to monitor the pressure in the exhaust gas pipeline, and transmits the monitored pressure parameters to the analysis module;

[0031] The analysis module receives the pressure parameters in the exhaust gas pipeline monitored by the second monitoring module, compares them with the preset pressure value, and transmits the comparison result to the adjustment module;

[0032] The adjustment module receives the comparison result transmitted by the analysis module and adjusts the opening degree of the valve body on the exhaust gas pipeline or the air volume of the fan according to the comparison result.

[0033] Further, the analysis module obtains the pressure parameters in the exhaust gas pipeline monitored by the second monitoring module and transmits the pressure parameters to the judgment module set in the analysis module;

[0034] The judgment module receives the pressure parameters transmitted by the analysis module, judges that the pressure value monitored by the second monitoring module is higher than the preset pressure value, and transmits the judgment result to the adjustment module;

[0035] The adjustment module receives the judgment result of the judgment module and increases the opening degree of the valve body on the exhaust gas pipeline according to the judgment result;

[0036] Alternatively, the judgment module receives the pressure parameters transmitted by the analysis module, judges that the pressure value monitored by the second monitoring module is lower than the preset pressure value, and transmits the judgment result to the adjustment module;

[0037] The adjustment module receives the judgment result of the judgment module and increases the air volume of the fan on the exhaust gas pipeline according to the judgment result.

[0038] Advantageously, through the monitoring of the monitoring device and the regulation of the regulation module, the stability and reliability of the carbon fiber waste gas treatment system can be ensured.

[0039] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0040] 1. The present invention is provided with a common RTO and a standby RTO. When the common RTO fails, it can be switched to the standby RTO. The switching and use of the common RTO and the standby RTO can ensure the continuity and stability of the carbon fiber production line.

[0041] 2. The heat exchange components of the present invention match the number of RTOs and are connected to the heat exchange components through a single pipeline for separate control, which not only ensures the stable operation of the system but also reduces the pipeline setting.

[0042] 3. The first monitoring module provided by the present invention monitors the concentration of combustible gas in the exhaust gas introduced into the RTO. The amount of combustion-supporting air and natural gas introduced into the RTO can be adjusted according to the monitoring result of the combustible gas concentration, improving the incineration efficiency of the exhaust gas and making the exhaust gas incineration more complete.

[0043] 4. Through the monitoring of the first monitoring module and the second monitoring module and the regulation of the regulation module, the carbon fiber production line of the present invention can be made more stable and reliable.

[0044] 5. The tail gas generated after the waste gas treatment system of the present invention is incinerated by the RTO enters the heat exchange component for heat exchange, which can reuse the heat in the tail gas and reduce the production cost.

[0045] The following further describes in detail the specific implementation manners of the present invention with reference to the accompanying drawings. Brief Description of the Drawings

[0046] The drawings, as part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not unduly limit the present invention. Obviously, the drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0047] Figure 1 is a schematic diagram of the working process of the heat exchange component of the present invention;

[0048] Figure 2 is a schematic diagram of the pipeline of the RTO of the waste gas treatment system of the present invention;

[0049] Figure 3 is a schematic diagram of the signal transmission process of the control device of the waste gas treatment system of the present invention.

[0050] In the figure: 100, incinerator; 200, regenerator; 300, heat exchange component; 301, first heat exchange component; 302, second heat exchange component; 400, reverse blower; 500, waste gas pipeline; 600, tail gas discharge pipeline; 700, combustion support pipeline; 800, reverse blow pipeline; 900, fresh air pipeline; 90, waste gas pipeline of the air collecting hood.

[0051] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0052] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but do not limit the scope of the present invention.

[0053] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0054] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] As Figures 1 to 2 shown, in a first aspect of the present invention, there is provided an exhaust gas treatment system for a carbon fiber production line, including: a pre-oxidation furnace, an exhaust gas pipeline, and an RTO. The exhaust gas generated during the carbon fiber production process enters the RTO through the exhaust gas pipeline for incineration treatment; the RTO includes: a common RTO and a standby RTO.

[0056] In this embodiment, the carbon fiber exhaust gas treatment system includes a common RTO and a standby RTO, and the exhaust gas pipeline 500 is provided with a main pipeline and a bypass pipeline. The bypass pipeline is communicated with the main pipeline through a valve body. The main pipeline of the exhaust gas pipeline 500 is connected to the common RTO, and the bypass pipeline is connected to the standby RTO. When an abnormality occurs in the common RTO, it can be switched to the bypass pipeline of the exhaust gas pipeline 500 through the valve body, and the exhaust gas is introduced into the standby RTO to realize the switching between the common RTO and the standby RTO.

[0057] In this embodiment, the RTO includes an incinerator 100 and five regenerators 200. The exhaust gas generated during the carbon fiber production process is absorbed into the regenerator 200 through the operation of the main fan on the exhaust gas pipeline 500, and then enters the incinerator 100 for incineration. During the carbon fiber exhaust gas treatment process, in the five regenerators 200, two are used as channels for the exhaust gas to enter the incinerator 100, two are used as channels for the tail gas to discharge from the incinerator 100, and the remaining one is used as a backflush channel, and they are alternately used in a certain order. The alternating use of the five regenerators 200 can ensure smooth gas flow in the incinerator 100 and can reduce the consumption of natural gas, achieving the effect of energy conservation and consumption reduction.

[0058] In this embodiment, a plurality of exhaust gas branch pipelines are provided on the exhaust gas pipeline 500 and are correspondingly connected to the regenerators 200 one by one. Each branch pipeline is provided with a valve body to cooperate with the switching of the regenerators 200. When the regenerator 200 is selected as the channel for the exhaust gas to enter the incinerator 100, the valve body on the corresponding exhaust gas branch pipeline is opened correspondingly to ensure that the exhaust gas enters the incinerator 100 through the corresponding branch pipeline and the regenerator 200 for exhaust gas incineration treatment.

[0059] More specifically, a plurality of exhaust gas branch pipelines are provided on the main pipeline of the exhaust gas pipeline 500, which are in one-to-one correspondence and communication with a plurality of regenerators 200 of a common RTO, guiding the exhaust gas into the regenerator 200 and then entering the incinerator 100 for incineration; a plurality of exhaust gas branch pipelines are also provided on the bypass pipeline of the exhaust gas pipeline 500, which are in one-to-one correspondence and communication with a plurality of regenerators 200 of a standby RTO, guiding the exhaust gas into the regenerator 200 and then entering the incinerator 100 for incineration; valve bodies are provided on the exhaust gas branch pipelines of the main pipeline of the exhaust gas pipeline 500 and the exhaust gas branch pipelines of the bypass pipeline of the exhaust gas pipeline 500 to cooperate with the switching sequence of the regenerator 200 to connect the exhaust gas branch pipeline and the regenerator 200 in a connected manner, ensuring that the exhaust gas can smoothly enter the incinerator 100 for incineration. The exhaust gas treatment system is further provided with: a combustion-supporting pipeline 700 and a natural gas pipeline, which are used to introduce combustion-supporting gas and natural gas into the incinerator 100 of the RTO to incinerate the exhaust gas.

[0060] A backflush pipeline 800, the backflush pipeline 800 is provided with a plurality of backflush branches, which are in one-to-one correspondence and communication with a plurality of regenerators 200, and a backflush blower 400 is provided at the end of the backflush pipeline 800.

[0061] In this embodiment, the exhaust gas treatment system is further provided with: a backflush pipeline 800, and a backflush blower 400 is provided on the backflush pipeline 800. When the exhaust gas incineration is completed and discharged, the backflush blower 400 operates, using the tail gas in the incinerator 100 as the backflush gas to purge the incinerator 100 and the regenerator 200, so as to achieve the effect of cleaning the regenerator 200 and the incinerator 100. The backflush pipeline 800 is provided with a plurality of backflush branches, and a valve body is provided on each backflush branch for realizing the on-off of the corresponding backflush branch. Corresponding to connect different regenerators 200, and according to the production needs, connect the corresponding regenerator 200 to introduce the backflush gas to clean the regenerator 200 and the incinerator 100.

[0062] In this embodiment, the exhaust gas treatment system is further provided with: a tail gas discharge pipeline 600, the tail gas discharge pipeline 600 is provided with a plurality of discharge branch pipelines, which are in one-to-one correspondence and communication with a plurality of regenerators 200, and a valve body is provided on each branch pipeline. Valve bodies are provided on the discharge branch pipelines provided on the tail gas discharge pipeline 600, and which branch pipeline can be connected can be selected through the control of the valve body. When a regenerator 200 is selected as the tail gas discharge channel, the valve body on the corresponding discharge branch pipeline is opened, and the tail gas generated in the incinerator 100 is discharged to the discharge branch pipeline through the corresponding regenerator 200 and then discharged through the tail gas discharge pipeline 600.

[0063] Furthermore, the exhaust gas treatment system further includes: a heat exchange component 300, which performs heat exchange treatment on the tail gas discharged after the RTO incineration is completed;

[0064] The heat exchange component 300 includes a first heat exchange component 301 and a second heat exchange component 302 corresponding to the normal RTO and the standby RTO respectively;

[0065] A cold air component, which is controllably connected to the first heat exchange component 301 or the second heat exchange component 302 to introduce cold air into the heat exchange component 300 for heat exchange with the tail gas.

[0066] In this embodiment, the tail gas of the incinerator 100 enters the heat exchange component 300 through the tail gas discharge pipeline 600. At the same time, cold air is introduced into the heat exchange component 300 through the cold air component for heat exchange with the tail gas. In this embodiment, the RTO is provided with a normal RTO and a standby RTO. Correspondingly, a first heat exchange component 301 and a second heat exchange component 302 are provided. When the RTO is switched, the heat exchange component 300 is switched simultaneously to ensure the continuous operation of the entire waste gas treatment system.

[0067] Further, both the first heat exchange component 301 and the second heat exchange component 302 are provided with a primary heat exchange part. The cold air component includes a gas collection hood waste gas pipeline 90, which is controllably connected to the primary heat exchange part of the first heat exchange component 301 or the primary heat exchange part of the second heat exchange component 302 to introduce the gas collection hood waste gas into the primary heat exchange part for primary heat exchange with the tail gas.

[0068] Further, both the first heat exchange component 301 and the second heat exchange component 302 are provided with a secondary heat exchange part. The cold air component includes a fresh air pipeline 900, which is controllably connected to the secondary heat exchange part of the first heat exchange component 301 or the secondary heat exchange part of the second heat exchange component 302 to introduce fresh air into the secondary heat exchange part for secondary heat exchange with the tail gas.

[0069] In this embodiment, the tail gas discharge pipeline 600 of the normal RTO is connected to the first heat exchange component 301. The tail gas generated by the incineration waste gas enters the first heat exchange component 301 through the tail gas discharge pipeline 600. At the same time, the gas collection hood waste gas pipeline 90 is connected to the primary heat exchange part of the first heat exchange component 301 through the control of the control valve to introduce the gas collection hood waste gas into the primary heat exchange part of the first heat exchange component 301 for primary heat exchange with the tail gas discharged from the RTO incineration; the fresh air pipeline 900 is connected to the secondary heat exchange part of the first heat exchange component 301 through the control of the control valve to introduce fresh air into the secondary heat exchange part of the first heat exchange component 301 for secondary heat exchange with the tail gas discharged after the primary heat exchange. The tail gas and fresh air after heat exchange enter the next process.

[0070] In another embodiment, the tail gas discharge pipeline 600 of the standby RTO is connected to the second heat exchange component 302. The tail gas generated by the incineration waste gas enters the second heat exchange component 302 through the tail gas discharge pipeline 600. At the same time, the waste gas pipeline 90 of the gas collecting hood is connected to the primary heat exchange part of the second heat exchange component 302 through the control of the control valve, and the waste gas of the gas collecting hood is introduced into the primary heat exchange part of the second heat exchange component 302 to perform primary heat exchange with the tail gas discharged from the RTO incineration. The fresh air pipeline 900 is connected to the secondary heat exchange part of the second heat exchange component 302 through the control of the control valve, and fresh air is introduced into the secondary heat exchange part of the second heat exchange component 302 to perform secondary heat exchange with the tail gas discharged after the heat exchange in the primary heat exchange part. The tail gas and fresh air after the heat exchange enter the next process.

[0071] In this embodiment, when the waste gas treatment system uses the common RTO, the first heat exchange component 301 is used at the same time. If the common RTO fails, the standby RTO is started, and at the same time, the heat exchange component 300 is replaced with the second heat exchange component 302, which can ensure that the waste gas treatment system does not stop working, and at the same time, the maintenance and cleaning of the RTO or the heat exchange component 300 can be realized.

[0072] Furthermore, the waste gas treatment system further includes: a discharge pipeline, which is controllably connected to the first heat exchange component 301 and the second heat exchange component 302, and the heat-exchanged tail gas is discharged through the discharge pipeline.

[0073] Furthermore, the waste gas treatment system further includes: a hot fresh air pipeline, which is controllably connected to the first heat exchange component 301 and the second heat exchange component 302, and the fresh air participating in the tail gas heat exchange is introduced into the pre-oxidation furnace through the hot fresh air pipeline.

[0074] In this embodiment, when the common RTO is used to incinerate waste gas, the first heat exchange component 301 performs heat exchange treatment on the tail gas discharged from the RTO. At this time, the waste gas pipeline 90 of the gas collecting hood and the fresh air pipeline 900 are connected to the first heat exchange component 301 through the control of the control valve, and the waste gas of the gas collecting hood is introduced into the primary heat exchange part of the first heat exchange component 301 and fresh air is introduced into the secondary heat exchange part respectively. The discharge pipeline and the hot fresh air pipeline are connected to the first heat exchange component 301 through the control of the control valve, and the heat-exchanged tail gas of the first heat exchange component 301 is discharged respectively and the hot fresh air after the heat exchange is introduced into the pre-oxidation furnace.

[0075] In another embodiment, when the standby RTO is used to incinerate waste gas, the second heat exchange component 302 performs heat exchange on the tail gas discharged from the RTO. At this time, the exhaust gas pipeline 90 of the air collecting hood and the fresh air pipeline 900 are communicated with the second heat exchange component 302 through the control of the control valve, and the exhaust gas of the air collecting hood and fresh air are respectively introduced into the primary heat exchange part and the secondary heat exchange part of the second heat exchange component 302; the discharge pipeline and the hot fresh air pipeline are communicated with the second heat exchange component 302 through the control of the control valve, and the tail gas after heat exchange of the second heat exchange component 302 is discharged respectively, and the hot fresh air after heat exchange is introduced into the pre-oxidation furnace.

[0076] As Figure 3 shown, in the second aspect of the present invention, a control device for an exhaust gas treatment system of a carbon fiber production line is provided, including:

[0077] A monitoring module, configured to monitor the pressure and / or the concentration of combustible gas in the exhaust gas treatment system, and transmit the monitored pressure and / or the concentration parameter of the combustible gas to the analysis module;

[0078] An analysis module, which receives the pressure and / or the concentration parameter of the combustible gas transmitted by the monitoring module, analyzes the obtained pressure and / or the concentration parameter of the combustible gas, and transmits the analysis result to the adjustment module;

[0079] An adjustment module, which receives the analysis result of the analysis module, and controls and adjusts the opening degree of the valve body on the corresponding pipeline and / or the air volume of the fan according to the analysis result.

[0080] Further, the monitoring module includes a first monitoring module, which is arranged on the exhaust gas pipeline in the exhaust gas treatment system, and is used to monitor the concentration of combustible gas in the exhaust gas pipeline, and transmit the monitored concentration parameter of the combustible gas to the analysis module;

[0081] The analysis module receives the concentration parameter of the combustible gas monitored by the first monitoring module, compares it with a preset value, and transmits the comparison result to the adjustment module;

[0082] The adjustment module receives the comparison result of the analysis module, and adjusts the frequency of the fan on the combustion-supporting air pipeline and / or the opening degree of the valve body on the natural gas pipeline according to the comparison result.

[0083] Further, the analysis module obtains the concentration parameter of the combustible gas monitored by the first monitoring module, and transmits the concentration parameter to the judgment module set in the analysis module;

[0084] The judgment module receives the concentration parameter transmitted by the analysis module, judges that the concentration of the combustible gas monitored by the first monitoring module is lower than the preset value, and transmits the judgment result to the adjustment module;

[0085] The adjustment module receives the judgment result of the judgment module, and controls the adjustment to reduce the frequency of the fan on the combustion-supporting air pipeline and / or reduce the opening degree of the valve body on the natural gas pipeline according to the judgment result.

[0086] In this embodiment, the first monitoring module is used to monitor the concentration of combustible gas in the waste gas in the waste gas pipeline. Here, the first monitoring module is an LEL sensor. The LEL sensor transmits the concentration result of the combustible gas in the monitored waste gas to the analysis module. The analysis module analyzes the received result and compares it with a preset value. Here, the preset value is the lower limit value of the explosive gas. If the concentration of the combustible gas is lower than the preset value, the analysis module transmits the passing signal of the analysis result to the adjustment module. The adjustment module controls the adjustment to reduce the frequency of the fan on the combustion-supporting air pipeline and / or reduce the opening degree of the valve body on the natural gas pipeline according to the received result signal.

[0087] Further, the monitoring module includes a second monitoring module, which is arranged on the waste gas pipeline in the waste gas treatment system and is used to monitor the pressure in the waste gas pipeline and transmit the monitored pressure parameter to the analysis module.

[0088] The analysis module receives the pressure parameter of the waste gas pipeline monitored by the second monitoring module, compares it with the preset pressure value, and transmits the comparison result to the adjustment module.

[0089] The adjustment module receives the comparison result transmitted by the analysis module and adjusts the opening degree of the valve body or the air volume of the fan on the waste gas pipeline according to the comparison result.

[0090] Further, the analysis module obtains the pressure parameter of the waste gas pipeline monitored by the second monitoring module and transmits the pressure parameter to the judgment module set in the analysis module.

[0091] The judgment module receives the pressure parameter transmitted by the analysis module, judges that the pressure value monitored by the second monitoring module is higher than the preset pressure value, and transmits the judgment result to the adjustment module.

[0092] The adjustment module receives the judgment result of the judgment module and increases the opening degree of the valve body on the waste gas pipeline according to the judgment result.

[0093] Alternatively, the judgment module receives the pressure parameter transmitted by the analysis module, judges that the pressure value monitored by the second monitoring module is lower than the preset pressure value, and transmits the judgment result to the adjustment module.

[0094] The adjustment module receives the judgment result of the judgment module and increases the air volume of the fan on the waste gas pipeline according to the judgment result.

[0095] In this embodiment, the second monitoring module is set to monitor the pressure in the exhaust gas pipeline. Here, the second monitoring module is a pressure transmitter, and it sends the monitoring result to the analysis module. The analysis module analyzes the result monitored by the pressure transmitter. If the analysis module analyzes that the pressure value in the exhaust gas pipeline is higher than the preset pressure value, the adjustment module adjusts the opening degree of the valve body on the exhaust gas pipeline to increase; if the analysis module analyzes that the pressure value in the exhaust gas pipeline is lower than the preset pressure value, the adjustment module adjusts the air volume of the fan on the exhaust gas pipeline to increase.

[0096] The present invention sets a common RTO and a standby RTO and corresponding first heat exchange component 301 and second heat exchange component 302, ensuring the continuity and stability of carbon fiber production; at the same time, through the monitoring and regulation of the control device, the stability and reliability of carbon fiber production are further ensured.

[0097] The above are only the preferred embodiments of the present invention, and there is no any form of limitation to the present invention. Although the present invention has been disclosed as above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent can make some changes or modifications to the equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention by using the technical content prompted above. The implementation schemes in the above embodiments can also be further combined or replaced. However, as long as it does not deviate from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. An exhaust gas treatment system for a carbon fiber production line, comprising: Pre-oxidation furnace, exhaust gas pipeline and RTO. The exhaust gas generated during the carbon fiber production process enters the RTO through the exhaust gas pipeline for incineration treatment; The RTO includes a common RTO and a standby RTO; it is characterized in that, It further includes: a heat exchange component for heat exchange treatment of the tail gas discharged after the RTO incineration is completed; The heat exchange component includes a first heat exchange component and a second heat exchange component corresponding to the common RTO and the standby RTO one by one; A cold air component, the cold air component is controllably connected to the first heat exchange component or the second heat exchange component, and cold air is introduced into the heat exchange component to exchange heat with the tail gas.

2. The exhaust gas treatment system of the carbon fiber production line according to claim 1, characterized in that, Both the first heat exchange component and the second heat exchange component are provided with a primary heat exchange part. The cold air component includes a collecting hood exhaust gas pipeline, and the collecting hood exhaust gas pipeline is controllably connected to the primary heat exchange part of the first heat exchange component or the primary heat exchange part of the second heat exchange component, and the collecting hood exhaust gas is introduced into the primary heat exchange part to perform primary heat exchange with the tail gas.

3. The exhaust gas treatment system of the carbon fiber production line according to claim 2, characterized in that, Both the first heat exchange component and the second heat exchange component are provided with a secondary heat exchange part. The cold air component includes a fresh air pipeline, and the fresh air pipeline is controllably connected to the secondary heat exchange part of the first heat exchange component or the secondary heat exchange part of the second heat exchange component, and fresh air is introduced into the secondary heat exchange part to perform secondary heat exchange with the tail gas.

4. The exhaust gas treatment system of the carbon fiber production line according to claim 1, characterized in that, It further includes: a discharge pipeline, the discharge pipeline is controllably connected to the first heat exchange component and the second heat exchange component, and the heat-exchanged tail gas is discharged through the discharge pipeline.

5. The exhaust gas treatment system of the carbon fiber production line according to claim 4, characterized in that, It further includes: A hot fresh air pipeline, the hot fresh air pipeline is controllably connected to the first heat exchange component and the second heat exchange component, and the fresh air participating in the tail gas heat exchange is introduced into the pre-oxidation furnace through the hot fresh air pipeline.

6. A control device for an exhaust gas treatment system of a carbon fiber production line as described in any one of claims 1-5, characterized in that, It includes: A monitoring module for monitoring the pressure and / or the concentration of combustible gas in the exhaust gas treatment system, and transmitting the monitored pressure and / or combustible gas concentration parameters to the analysis module; An analysis module, receiving the pressure and / or combustible gas concentration parameters transmitted by the monitoring module, analyzing the obtained pressure and / or combustible gas concentration parameters, and transmitting the analysis result to the adjustment module; An adjustment module, receiving the analysis result of the analysis module, and controlling and adjusting the opening of the valve body on the corresponding pipeline and / or the air volume of the fan according to the analysis result.

7. The control device according to claim 6, characterized in that, The monitoring module includes a first monitoring module, which is arranged on the exhaust gas pipeline in the exhaust gas treatment system, for monitoring the concentration of combustible gas in the exhaust gas pipeline, and transmitting the monitored combustible gas concentration parameters to the analysis module; The analysis module, receiving the concentration parameters of the combustible gas monitored by the first monitoring module, comparing them with the preset value, and transmitting the comparison result to the adjustment module; The adjustment module, receiving the comparison result of the analysis module, and adjusting the frequency of the fan on the combustion-supporting air pipeline and / or the opening of the valve body on the natural gas pipeline according to the comparison result.

8. The control device according to claim 7, wherein: The analysis module obtains the concentration parameter of the combustible gas monitored by the first monitoring module, and transmits the concentration parameter to the judgment module set in the analysis module; The judgment module receives the concentration parameter transmitted by the analysis module, judges that the concentration of the combustible gas monitored by the first monitoring module is lower than the preset value, and transmits the judgment result to the adjustment module; The adjustment module receives the judgment result of the judgment module, and controls and adjusts to reduce the frequency of the fan on the combustion-supporting air duct and / or reduce the opening degree of the valve body on the natural gas pipeline according to the judgment result.

9. The control device according to claim 6, wherein: The monitoring module includes a second monitoring module, which is arranged on the exhaust gas pipeline in the exhaust gas treatment system and is used for monitoring the pressure in the exhaust gas pipeline and transmitting the monitored pressure parameter to the analysis module; The analysis module receives the pressure parameter of the exhaust gas pipeline monitored by the second monitoring module, compares it with the preset pressure value, and transmits the comparison result to the adjustment module; The adjustment module receives the comparison result transmitted by the analysis module, and adjusts the opening degree of the valve body or the air volume of the fan on the exhaust gas pipeline according to the comparison result.

10. The control device according to claim 9, wherein: The analysis module obtains the pressure parameter of the exhaust gas pipeline monitored by the second monitoring module, and transmits the pressure parameter to the judgment module set in the analysis module; The judgment module receives the pressure parameter transmitted by the analysis module, judges that the pressure value monitored by the second monitoring module is higher than the preset pressure value, and transmits the judgment result to the adjustment module; The adjustment module receives the judgment result of the judgment module, and adjusts the opening degree of the valve body on the exhaust gas pipeline to increase according to the judgment result; Alternatively, the judgment module receives the pressure parameter transmitted by the analysis module, judges that the pressure value monitored by the second monitoring module is lower than the preset pressure value, and transmits the judgment result to the adjustment module; The adjustment module receives the judgment result of the judgment module, and adjusts the air volume of the fan on the exhaust gas pipeline to increase according to the judgment result.

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