Control device of TO furnace incineration system of carbon fiber production line

Abstract

The invention discloses a control device for a TO furnace incineration system of a carbon fiber production line, and the device comprises a monitoring module which is used for monitoring the pressure and / or temperature in the TO furnace incineration system, and transmitting the monitored and obtained pressure and / or temperature parameters to an analysis module; the analysis module is used for receiving the pressure and / or temperature parameters transmitted by the monitoring module, analyzing the obtained pressure and / or temperature parameters and then transmitting an analysis result to the adjusting module; and the adjusting module is used for receiving the analysis result transmitted by the analysis module and controlling and adjusting the opening degree of the valve body on the corresponding pipeline and / or the air volume of the fan according to the received analysis result. According to the control device of the TO furnace incineration system, the multiple monitoring devices are arranged in the TO furnace incineration system to monitor the temperature and / or pressure, the opening degree of the valve body on the corresponding pipeline and / or the air volume of the draught fan are / is adjusted according to the analysis result, all the incineration conditions in the TO furnace are monitored and adjusted in time, and the incineration efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste gas treatment, and more particularly, relates to a control device for a TO furnace incineration system in a carbon fiber production line. Background Art

[0002] Carbon fiber is made by pyrolytic carbonization of organic matrix fibers such as polyacrylonitrile (PAN) (or pitch, viscose) under an inert gas at a temperature above 1,000 degrees Celsius (the result is the removal of most elements other than carbon) to form a carbon main chain structure. It is an inorganic high molecular fiber with a carbon content of more than 90%.

[0003] In carbon fiber production, low-temperature carbonization and high-temperature carbonization are important technological processes, but a large amount of waste gas is generated during this process. Currently, carbon fiber production lines all use TO furnaces to treat the waste gas in the carbonization process. However, due to the structure and actual situation of the TO furnace, different effects will be produced on the feeding speed. Once the feeding rate is too high, the TO furnace will not be able to be fully preheated and burned, and the TO furnace waste gas treatment system will also break down; but if the speed is too slow, it will lead to uneven load in the TO furnace, unable to effectively adjust the load, and waste energy. If the internal balance of the TO furnace is insufficient and the combustion is asymmetric, it will lead to combustion deviation of the TO furnace, reducing its waste gas treatment effect and increasing the generation of pollutants.

[0004] During the combustion process of the TO furnace, due to uneven combustion, a large number of solid flue gas particles are often formed and enter the fan during the operation of the TO furnace. Under normal circumstances, the fan can effectively discharge them. However, if there are too many solid flue gas particles, the fan of the incinerator will be blocked. Seriously, it will cause the fan to stop running, making the incinerator completely lose its treatment capacity.

[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 control device for a TO furnace incineration system in a carbon fiber production line. By monitoring the pressure and temperature in the TO furnace incineration system through a monitoring module, analyzing the monitoring results through an analysis module, and controlling the valve body and the air volume of the fan according to the analysis results by an adjustment module, it is ensured that the flue gas in the TO furnace is fully burned, the incineration efficiency is improved, and the loss of equipment is reduced.

[0007] The basic concept of the technical solution adopted by the present invention to solve the above technical problem is as follows:

[0008] A control device for a TO furnace incineration system in a carbon fiber production line, comprising:

[0009] A monitoring module, configured to monitor the pressure and / or temperature in the TO furnace incineration system, and transmit the monitored pressure and / or temperature parameters to the analysis module;

[0010] An analysis module, which receives the pressure and / or temperature parameters transmitted by the monitoring module, analyzes the obtained pressure and / or temperature parameters, and transmits the analysis results to the adjustment module;

[0011] An adjustment module, which receives the analysis results transmitted by 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 received analysis results.

[0012] Further, the monitoring module includes: a first monitoring module and a second monitoring module, which are used to monitor the temperature in different areas of the TO furnace incineration system, and transmit the monitored temperature parameters to the analysis module;

[0013] The analysis module receives the first temperature monitored by the first monitoring module and the second temperature monitored by the second monitoring module, obtains the difference between the two, compares the difference with the preset temperature range value, and transmits the comparison result to the adjustment module;

[0014] The adjustment module receives the comparison result transmitted by the analysis module, and adjusts the opening degree of the valve body on the combustion-supporting air pipeline and / or the fresh air pipeline according to the comparison result.

[0015] Advantageously, multiple monitoring modules are set in different areas within the TO furnace incineration system to monitor the temperature of the TO furnace in a divided area, so as to timely understand the combustion conditions in each area of the TO furnace and make adjustments.

[0016] Further, the analysis module calculates the difference between the first temperature monitored by the first monitoring module and the second temperature monitored by the second monitoring module, and transmits the difference to the judgment module set in the analysis module;

[0017] The judgment module receives the difference transmitted by the analysis module, judges that the difference exceeds the preset range value, and transmits the judgment result to the adjustment module;

[0018] The adjustment module receives the judgment result of the judgment module, and according to the judgment result, increases the opening degree of the valve body on the combustion-supporting air pipeline and / or the fresh air pipeline, and introduces sufficient combustion-supporting air and / or fresh air into the TO furnace.

[0019] Further, the monitoring module includes: a third monitoring module, which is used to monitor the pressure in the combustion-supporting air pipeline of the TO furnace incineration system, and transmits the monitored pressure parameters to the analysis module;

[0020] The analysis module receives the pressure parameters in the combustion-supporting air pipeline monitored by the third monitoring module, compares them with the preset pressure value in the combustion-supporting air pipeline, and transmits the comparison result to the adjustment module;

[0021] The adjustment module receives the comparison result transmitted by the analysis module, and adjusts the opening degree of the valve body on the combustion-supporting air pipeline and / or the air volume of the fan according to the comparison result.

[0022] Furthermore, the analysis module obtains the pressure parameter in the combustion-supporting air pipeline monitored by the third monitoring module, and transmits the pressure parameter to the judgment module set in the analysis module;

[0023] The judgment module receives the pressure parameter transmitted by the analysis module, judges that the pressure in the combustion-supporting air pipeline monitored by the third monitoring module is higher than the preset pressure value in the combustion-supporting air pipeline, and transmits the judgment result to the adjustment module;

[0024] The adjustment module receives the judgment result of the judgment module, and controls the opening degree of the valve body on the combustion-supporting air pipeline to increase or the adjustment module controls the air volume of the fan on the combustion-supporting air pipeline to decrease according to the judgment result;

[0025] Or, the judgment module receives the pressure parameter transmitted by the analysis module, judges that the pressure in the combustion-supporting air pipeline monitored by the third monitoring module is lower than the preset pressure value in the combustion-supporting air pipeline, and transmits the judgment result to the adjustment module;

[0026] The adjustment module receives the judgment result of the judgment module, and controls the opening degree of the valve body on the combustion-supporting air pipeline to decrease or the adjustment module controls the air volume of the fan on the combustion-supporting air pipeline to increase according to the judgment result.

[0027] Furthermore, the monitoring module includes: a fourth monitoring module for monitoring the pressure in the exhaust gas pipeline of the TO furnace incineration system, and transmitting the monitored pressure parameter to the analysis module;

[0028] The analysis module receives the pressure parameter in the exhaust gas pipeline monitored by the fourth monitoring module, compares it with the preset pressure value in the exhaust gas pipeline, and transmits the comparison result to the adjustment module;

[0029] 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 and / or the air volume of the fan according to the comparison result.

[0030] Furthermore, the analysis module obtains the pressure parameter in the exhaust gas pipeline monitored by the fourth monitoring module, and transmits the pressure parameter to the judgment module set in the analysis module;

[0031] The judgment module receives the pressure parameter transmitted by the analysis module, judges that the pressure in the exhaust gas pipeline monitored by the fourth monitoring module is higher than the preset pressure value in the exhaust gas pipeline, and transmits the judgment result to the adjustment module;

[0032] The adjustment module receives the judgment result of the judgment module, and controls the opening degree of the valve body on the exhaust gas pipeline to increase or the adjustment module controls the air volume of the fan on the exhaust gas pipeline to decrease according to the judgment result;

[0033] Alternatively, the judgment module receives the pressure parameter transmitted by the analysis module, determines that the pressure in the exhaust pipe monitored by the fourth monitoring module is lower than the preset pressure value in the exhaust pipe, and transmits the judgment result to the adjustment module;

[0034] The regulating module receives the judgment result of the judging module, and controls the valve body on the exhaust pipe to reduce the opening according to the judgment result, or controls the fan on the exhaust pipe to increase the air volume.

[0035] Furthermore, the monitoring module includes: a fifth monitoring module for monitoring the temperature in the nitrogen pipeline in the TO furnace incineration system and transmitting the temperature parameters obtained by monitoring to the analysis module;

[0036] an analysis module, receiving the temperature parameter in the nitrogen pipeline monitored by the fifth monitoring module, comparing it with the temperature preset range value in the nitrogen pipeline, and transmitting the comparison result to the regulation module;

[0037] The regulating module receives the comparison result transmitted by the analyzing module and controls the opening and closing of the valve body on the nitrogen pipeline according to the comparison result.

[0038] Furthermore, the analysis module obtains the temperature parameter in the nitrogen pipeline monitored by the fifth monitoring module, and transmits the temperature parameter to the judgment module provided in the analysis module;

[0039] The judgment module receives the temperature parameter transmitted by the analysis module, judges that the temperature in the nitrogen pipeline monitored by the fifth monitoring module exceeds a preset temperature range value in the nitrogen pipeline, and transmits the judgment result to the adjustment module;

[0040] The regulating module receives the judgment result of the judging module and controls the valve body on the nitrogen pipeline to open according to the judgment result, so as to introduce nitrogen into the TO furnace.

[0041] Advantageously, by reasonably controlling the opening and closing of the valve body on the nitrogen pipeline, nitrogen can be introduced in time when the TO furnace tempers, thereby effectively preventing the danger of the TO furnace tempering.

[0042] Furthermore, the monitoring module includes: a sixth monitoring module for monitoring the temperature in the waste heat boiler in the TO furnace incineration system and transmitting the temperature parameters obtained by monitoring to the analysis module;

[0043] The analysis module receives the temperature parameters of the exhaust gas in the waste heat boiler before and after heat exchange monitored by the sixth monitoring module, calculates the temperature difference before and after heat exchange, and transmits the difference to the judgment module set in the analysis module;

[0044] The judgment module receives the temperature difference transmitted by the analysis module, judges that the difference is less than a preset value, and transmits the judgment result to the adjustment module;

[0045] The adjustment module receives the judgment result of the judgment module and controls the operation of the soot blower in the waste heat boiler according to the judgment result to clean the steam drum and / or economizer in the waste heat boiler.

[0046] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0047] 1. In the TO furnace incineration system of the present invention, a plurality of temperature monitoring devices are arranged in the TO furnace to monitor the temperature in the TO furnace in sections, so as to timely understand the combustion conditions in each area of the TO furnace, make timely adjustments, improve the incineration efficiency, and reduce the loss of equipment.

[0048] 2. By controlling the flow rates of the fresh air and the combustion-supporting air, the present invention makes the flue gas temperatures in each section of the TO furnace close to equilibrium, ensures the full combustion and oxidation of the waste gas in the furnace, improves the waste gas treatment efficiency, and reduces environmental pollution.

[0049] 3. The present invention inputs the waste gas of the TO furnace into the waste heat boiler, utilizes the waste heat of the waste gas, plays a role in assisting the subsequent process, saves energy and reduces consumption, and reduces the production cost.

[0050] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. Description of the Drawings

[0051] As a part of the present invention, the accompanying drawings 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 constitute an improper limitation to the present invention. Obviously, the accompanying 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:

[0052] Figure 1 is the signal transmission flow chart of the control device of the TO furnace incineration system of the present invention;

[0053] Figure 2 is the schematic flow chart of the TO furnace combustion pipeline of the present invention;

[0054] Figure 3 is the schematic flow chart of the waste heat boiler pipeline of the present invention.

[0055] In the figure: 10. TO furnace; 20. Waste gas pipeline; 30. Fresh air pipeline; 40. Nitrogen pipeline; 50. Combustion-supporting air pipeline; 51. Combustion-supporting fan; 60. Natural gas pipeline; 70. Waste heat boiler; 71. Steam drum; 72. Superheater; 73. Economizer; 74. Fresh water; 75. Blowdown flash tank; 76. Boiler feed water; 77. Soot blower.

[0056] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by reference to specific embodiments. Detailed Embodiments

[0057] 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 accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0058] In the description of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are 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 to the present invention.

[0059] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected 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.

[0060] As Figures 1 to 2 shown, the present invention provides a control device for the incineration system of the TO furnace 10 in a carbon fiber production line. The carbon fiber production line includes: a carbonization furnace, an exhaust gas pipeline 20, and a TO furnace 10. The carbonization furnace includes a low-temperature carbonization furnace and a high-temperature carbonization furnace, and correspondingly, a low-temperature exhaust gas pipeline and a high-temperature exhaust gas pipeline are provided. The low-temperature exhaust gas pipeline is connected to the low-temperature carbonization furnace, and the exhaust gas generated by the low-temperature carbonization furnace is transported to the TO furnace 10 for incineration in a negative pressure manner; the high-temperature exhaust gas pipeline is connected to the high-temperature carbonization furnace, and the exhaust gas generated by the high-temperature carbonization furnace is input into the TO furnace 10 for incineration in a negative pressure manner.

[0061] In this embodiment, the TO furnace 10 incineration system includes: a fresh air pipeline 30 that conveys fresh air to the TO furnace 10 in a negative pressure manner; a nitrogen pipeline 40 that is connected to the TO furnace 10 and is used to introduce nitrogen into the TO furnace 10; a combustion-supporting air pipeline 50, on which a combustion-supporting air blower 51 is provided, and the combustion-supporting air pipeline 50 conveys combustion-supporting air to the TO furnace 10 in a positive pressure manner; and a natural gas pipeline 60 that is used to convey natural gas into the TO furnace 10. Solenoid valves are provided on the exhaust gas pipeline 20, the fresh air pipeline 30, the nitrogen pipeline 40, and the combustion-supporting air pipeline 50 to control the on / off of the corresponding pipelines.

[0062] The tail gas discharge end of the TO furnace 10 is connected to a waste heat boiler 70, and the tail gas generated in the TO furnace 10 is input into the waste heat boiler 70 through a set tail gas pipeline for heat exchange treatment. A tail gas discharge pipeline is provided at the tail gas discharge end of the TO furnace 10, and the tail gas discharge pipeline is connected to the waste heat boiler 70 to introduce the tail gas into the waste heat boiler 70; a tail gas discharge fan is provided on the tail gas discharge pipeline coming out of the waste heat boiler 70, and the tail gas discharge fan conveys the tail gas to the chimney for discharge.

[0063] In the embodiment of the present invention, the control device of the TO furnace 10 incineration system of the carbon fiber production line includes:

[0064] A monitoring module that is used to monitor the pressure and / or temperature in the TO furnace 10 incineration system and transmit the monitored pressure and / or temperature parameters to the analysis module;

[0065] An analysis module that receives the pressure and / or temperature parameters transmitted by the monitoring module, analyzes the obtained pressure and / or temperature parameters, and transmits the analysis result to the adjustment module;

[0066] An adjustment module that receives the analysis result transmitted by the analysis module and controls and adjusts the valve body opening degree on the corresponding pipeline and / or the air volume of the blower according to the received analysis result.

[0067] Further, the monitoring module includes: a first monitoring module and a second monitoring module that are used to monitor the temperature in different areas of the TO furnace 10 incineration system and transmit the monitored temperature parameters to the analysis module;

[0068] The analysis module receives the first temperature monitored by the first monitoring module and the second temperature monitored by the second monitoring module, obtains the difference between the two, and compares the difference with a preset temperature range value to obtain a comparison result and transmit it to the adjustment module;

[0069] The adjustment module receives the comparison result transmitted by the analysis module and adjusts the opening degree of the valve body on the combustion-supporting air pipeline 50 and / or the fresh air pipeline 30 according to the comparison result.

[0070] Further, the analysis module calculates the difference between the first temperature monitored by the first monitoring module and the second temperature monitored by the second monitoring module, and transmits the difference to the judgment module set within the analysis module;

[0071] The judgment module receives the difference transmitted by the analysis module, judges that the difference exceeds the preset range value, and transmits the judgment result to the adjustment module;

[0072] The adjustment module receives the judgment result of the judgment module, and according to the judgment result, adjusts the opening degree of the valve body on the combustion-supporting air duct 50 and / or the fresh air duct 30 to increase, and introduces sufficient combustion-supporting air and / or fresh air into the TO furnace 10.

[0073] In the embodiment of the present invention, the TO furnace 10 is divided into at least two regions, and each region is provided with a temperature monitoring device. In this embodiment, the temperature monitoring device is a temperature transmitter, which is used to monitor the temperature change of each region. Through the monitoring of the temperature, it is ensured that the temperature of each region in the TO furnace 10 is close to equilibrium during the whole process, ensuring that the waste gas is fully combusted and oxidized in the furnace, improving the treatment efficiency, and reducing environmental pollution.

[0074] In the embodiment of the present invention, the fresh air duct 30 is connected to the TO furnace 10 in a negative pressure manner, and a solenoid valve is arranged on the duct. Here, the solenoid valve is a proportional valve. When the temperature in the TO furnace 10 exceeds the range, the proportion of the proportional valve can be adjusted to introduce fresh air into the TO furnace 10 to cool the temperature in the TO furnace 10 and prevent the furnace body from overheating. A combustion-supporting air fan 51 is arranged at the inlet of the combustion-supporting air duct 50, and the combustion-supporting air is transported into the TO furnace 10 in a positive pressure manner to incinerate the waste gas in the TO furnace 10.

[0075] Specifically, the TO furnace 10 is divided into at least two regions, and the first monitoring module and the second monitoring module are respectively set to monitor the temperature, and the monitored temperature results are transmitted to the analysis module. The analysis module obtains two temperature values, calculates the difference between the two temperature values, and then transmits the calculated difference to the judgment module. If the judgment module judges that the difference exceeds the temperature range value, the result is transmitted to the adjustment module. The adjustment module adjusts the opening degree of the valve body on the combustion-supporting air duct and / or the fresh air duct to increase according to the received result, and introduces sufficient combustion-supporting air and / or fresh air into the TO furnace 10.

[0076] Further, the monitoring module includes: a third monitoring module, which is used to monitor the pressure in the combustion-supporting air duct 50 of the TO furnace 10 incineration system, and transmits the monitored pressure parameter to the analysis module;

[0077] The analysis module receives the pressure parameter in the combustion-supporting air duct 50 monitored by the third monitoring module, compares it with the preset pressure value in the combustion-supporting air duct 50, and transmits the comparison result to the adjustment module;

[0078] The regulating module receives the comparison result transmitted by the analyzing module and regulates the opening of the valve body on the combustion-supporting air duct 50 and / or the air volume of the fan according to the comparison result.

[0079] Furthermore, the analysis module obtains the pressure parameters in the combustion-supporting air duct 50 monitored by the three monitoring modules, and transmits the pressure parameters to the judgment module provided in the analysis module;

[0080] The judgment module receives the pressure parameter transmitted by the analysis module, judges that the pressure in the combustion-supporting air duct 50 monitored by the third monitoring module is higher than the preset pressure value in the combustion-supporting air duct 50, and transmits the judgment result to the adjustment module;

[0081] The regulating module receives the judgment result of the judging module and controls the valve body on the combustion-supporting air duct 50 to increase the opening degree or controls the air volume of the fan on the combustion-supporting air duct 50 to decrease according to the judgment result;

[0082] Alternatively, the judgment module receives the pressure parameter transmitted by the analysis module, determines that the pressure in the combustion-supporting air duct 50 monitored by the third monitoring module is lower than the preset pressure value in the combustion-supporting air duct 50, and transmits the judgment result to the adjustment module;

[0083] The regulating module receives the judgment result of the judging module, and controls the valve body on the combustion-supporting air duct 50 to reduce the opening according to the judgment result, or controls the fan on the combustion-supporting air duct 50 to increase the air volume.

[0084] Specifically, a third monitoring device is provided on the combustion-supporting air duct 50. The third monitoring device here is a pressure transmitter, which is used to monitor the pressure in the combustion-supporting air duct 50. When the pressure in the duct is high, the pressure transmitter sends the monitoring result to the analysis module. After receiving the signal, the analysis module compares the pressure in the combustion-supporting air duct 50 monitored by the pressure transmitter with the preset pressure value in the combustion-supporting air duct 50. If the analysis shows that the pressure in the combustion-supporting air duct 50 monitored by the pressure transmitter is higher than the preset pressure value in the combustion-supporting air duct 50, the adjustment module controls the alarm and increases the pressure. The opening of the solenoid valve provided on the combustion-supporting air duct 50 or the regulating module controls the air volume of the fan on the combustion-supporting air duct 50 to decrease, so as to reduce the pressure in the combustion-supporting air duct 50 and drop it to a reasonable range; if the analysis shows that the pressure in the combustion-supporting air duct 50 monitored by the pressure transmitter is lower than the preset pressure value in the combustion-supporting air duct 50, the regulating module controls the alarm to be issued and reduces the opening of the solenoid valve provided on the combustion-supporting air duct 50 or the regulating module controls the air volume of the fan on the combustion-supporting air duct 50 to increase, so as to increase the pressure in the combustion-supporting air duct 50 and raise it to a reasonable range.

[0085] Further, the monitoring module includes: a fourth monitoring module for monitoring the pressure in the exhaust gas pipeline 20 of the TO furnace 10 incineration system and transmitting the monitored pressure parameters to the analysis module;

[0086] An analysis module that receives the pressure parameters in the exhaust gas pipeline 20 monitored by the fourth monitoring module, compares them with the preset pressure value in the exhaust gas pipeline 20, and transmits the comparison result to the adjustment module;

[0087] An adjustment module that receives the comparison result transmitted by the analysis module and adjusts the opening degree of the valve body on the exhaust gas pipeline 20 and / or the air volume of the fan according to the comparison result.

[0088] Further, the analysis module obtains the pressure parameters in the exhaust gas pipeline 20 monitored by the four monitoring modules and transmits the pressure parameters to the judgment module set in the analysis module;

[0089] The judgment module receives the pressure parameters transmitted by the analysis module, judges that the pressure in the exhaust gas pipeline 20 monitored by the fourth monitoring module is higher than the preset pressure value in the exhaust gas pipeline 20, and transmits the judgment result to the adjustment module;

[0090] The adjustment module receives the judgment result of the judgment module and controls the opening degree of the valve body on the exhaust gas pipeline 20 to increase or the adjustment module controls the air volume of the fan on the exhaust gas pipeline 20 to decrease according to the judgment result;

[0091] Alternatively, the judgment module receives the pressure parameters transmitted by the analysis module, judges that the pressure in the exhaust gas pipeline 20 monitored by the fourth monitoring module is lower than the preset pressure value in the exhaust gas pipeline 20, and transmits the judgment result to the adjustment module;

[0092] The adjustment module receives the judgment result of the judgment module and controls the opening degree of the valve body on the exhaust gas pipeline 20 to decrease or the adjustment module controls the air volume of the fan on the exhaust gas pipeline 20 to increase according to the judgment result.

[0093] Specifically, a fourth monitoring device is provided on the exhaust gas pipeline 20. The fourth monitoring device here is also a pressure transmitter for the user to monitor the pressure inside the exhaust gas pipeline 20. When the pressure transmitter monitors that the pressure inside the exhaust gas pipeline 20 is low, the pressure transmitter sends the monitored result to the analysis module. After receiving the signal, the analysis module compares the monitored pressure inside the exhaust gas pipeline 20 with the preset pressure value inside the exhaust gas pipeline 20. If the analysis module analyzes that the pressure inside the exhaust gas pipeline 20 monitored by the pressure transmitter is higher than the preset pressure value inside the exhaust gas pipeline 20, the adjustment module controls the opening degree of the valve body on the exhaust gas pipeline 20 to increase or the adjustment module controls the air volume of the fan on the exhaust gas pipeline 20 to decrease, so that the pressure inside the exhaust gas pipeline 20 drops to a reasonable range; if the analysis module analyzes that the pressure inside the exhaust gas pipeline 20 monitored by the pressure transmitter is lower than the preset pressure value inside the exhaust gas pipeline 20, the adjustment module controls the opening degree of the valve body on the exhaust gas pipeline 20 to decrease or the adjustment module controls the air volume of the fan on the exhaust gas pipeline 20 to increase, so that the pressure inside the exhaust gas pipeline 20 rises to a reasonable range.

[0094] Further, the monitoring module includes: a fifth monitoring module for monitoring the temperature inside the nitrogen pipeline 40 in the TO furnace 10 incineration system and transmitting the monitored temperature parameters to the analysis module;

[0095] The analysis module receives the temperature parameters inside the nitrogen pipeline 40 monitored by the fifth monitoring module, compares them with the preset temperature range value inside the nitrogen pipeline 40, and transmits the comparison result to the adjustment module;

[0096] The adjustment module receives the comparison result transmitted by the analysis module and controls the opening and closing of the valve body on the nitrogen pipeline 40 according to the comparison result.

[0097] Further, the analysis module obtains the temperature parameters inside the nitrogen pipeline 40 monitored by the fifth monitoring module and transmits the temperature parameters to the judgment module set inside the analysis module;

[0098] The judgment module receives the temperature parameters transmitted by the analysis module, judges that the temperature inside the nitrogen pipeline 40 monitored by the fifth monitoring module exceeds the preset temperature range value inside the nitrogen pipeline 40, and transmits the judgment result to the adjustment module;

[0099] The adjustment module receives the judgment result of the judgment module and controls the valve body on the nitrogen pipeline 40 to open according to the judgment result, and introduces nitrogen into the TO furnace 10.

[0100] Specifically, a fifth monitoring module is provided on the nitrogen pipeline 40. Here, the fifth monitoring module is a temperature transmitter. When backfire occurs in the TO furnace 10, the temperature monitoring device provided on the nitrogen pipeline 40 will monitor the temperature change and send the monitored result to the analysis module. The analysis module compares the temperature inside the nitrogen pipeline 40 received with the preset temperature range value inside the nitrogen pipeline 40. If the analysis shows that the temperature exceeds the preset temperature range value, the result will be fed back to the adjustment module, and the adjustment module controls the opening of the automatic valve on the nitrogen pipeline 40 to introduce nitrogen into the TO furnace 10 through the pipeline to prevent greater danger caused by the backfire of the TO furnace 10.

[0101] The incineration technology of the TO furnace 10 is specifically as follows: Fresh air is automatically supplemented into the furnace in a negative pressure manner through the fresh air pipeline. The combustion-supporting fan 51, the low-temperature furnace waste gas fan, and the high-temperature furnace waste gas fan operate. The combustion-supporting air, the low-temperature carbonization furnace waste gas, and the high-temperature carbonization furnace waste gas are respectively introduced into the TO furnace 10 through the combustion-supporting air pipeline 50, the low-temperature waste gas pipeline, and the high-temperature waste gas pipeline for combustion oxidation. At this time, if pipeline backfire occurs, the valve provided on the nitrogen pipeline 40 automatically drops to prevent backfire; through the temperature transmitters in two areas of the TO furnace 10, the temperatures and combustion conditions in the two areas of the TO furnace 10 are monitored. If the temperature difference is too large and the combustion is unbalanced, the control device controls the opening degrees of the valves of the combustion-supporting air pipeline 50 and the fresh air pipeline 30 to adjust the combustion conditions in each area of the TO furnace 10, so that the flue gas temperatures in each area are balanced and the combustion is uniform and sufficient. The whole process makes the flue gas temperatures in each section of the TO furnace 10 close to balance, ensures that the waste gas is fully combusted and oxidized in the furnace, improves the waste gas treatment efficiency, and reduces environmental pollution.

[0102] Further, the monitoring module includes: a sixth monitoring module for monitoring the temperature inside the waste heat boiler 70 in the incineration system of the TO furnace 10 and transmitting the monitored temperature parameters to the analysis module;

[0103] The analysis module receives the temperature parameters before and after the tail gas heat exchange inside the waste heat boiler 70 monitored by the sixth monitoring module, calculates the temperature difference before and after the heat exchange, and transmits the difference to the judgment module set inside the analysis module;

[0104] The judgment module receives the temperature difference transmitted by the analysis module, judges that the difference is less than the preset value, and transmits the judgment result to the adjustment module;

[0105] The adjustment module receives the judgment result of the judgment module and controls the operation of the soot blower 77 inside the waste heat boiler 70 according to the judgment result to clean the steam drum 71 and / or the economizer 73 inside the waste heat boiler 70.

[0106] Such as Figure 3As shown, in this embodiment, a steam drum 71 for storing water, a superheater 72, two economizers 73, a blowdown flash tank 75, soot blowers 77, a steam header, a steam drum waste discharge pipe, a steam drum exhaust gas pipe, a fresh water 74 supply pipe, and a boiler feed water 76 pipe are provided in the waste heat boiler 70.

[0107] Specifically, the waste heat boiler 70 is connected to the TO furnace 10 through an exhaust gas discharge pipe. The exhaust gas of the TO furnace 10 enters the waste heat boiler 70, and the heat of the exhaust gas is used to heat the water in the steam drum 71 to turn it into steam. The superheater 72 is connected to the steam drum 71, and the steam coming out of the steam drum 71 is reheated by the superheater 72. The steam header is communicated with the superheater 72. The steam reheated twice passes through the steam header for further separation and finally reaches subsequent processes such as hot rollers, heat setting, and vertical drying to supplement heat. A proportional valve is provided between the steam header and the superheater 72 to control the steam flow rate in the pipeline, and the remaining separated impurities flow to the drain. An evacuation device is provided at the outlet of the superheater 72 to prevent the gas pressure in the pipeline from being too high. The blowdown flash tank 75 is connected to the steam drum 71, and the first batch of waste generated by the steam drum 71 flows into the blowdown flash tank 75 through the steam drum waste discharge pipe. The steam drum exhaust gas pipe conveys the exhaust gas passing through the steam drum 71 to the superheater 72, and the heat of the exhaust gas is used to heat the passing steam. The fresh water 74 supply pipe is connected to the blowdown flash tank 75 and is used to supplement cold water into the blowdown flash tank 75 to reduce the temperature of the waste. The boiler feed water 76 pipe is used to supply water to the two economizers 73 to cool the temperature of the waste flowing through the economizers 73. Seven soot blowers 77 are provided at the steam drum 71, two soot blowers 77 are respectively provided in front of the two economizers 73, and one soot blower 77 is provided at the outlet of the economizer 73 leading to the chimney.

[0108] Specifically, a sixth monitoring module is provided in the waste heat boiler 70. Here, the sixth monitoring module is a temperature transmitter, which is used to monitor the temperature before and after the exhaust gas heat exchange. If the temperature difference of the heat exchanger is less than the preset temperature value, and the preset value here is 5 degrees, it means that the heat exchanger needs to be cleaned. At this time, the adjustment module controls the soot blower 77 to operate to clean the steam drum 71 or the economizer 73 in the waste heat boiler 70. After the cleaning is completed, the temperature is continuously monitored, and according to the temperature after heat exchange, the opening degree of the solenoid valve is controlled to adjust the heat exchange efficiency and the use efficiency of the subsequent process.

[0109] The heat exchange treatment of the tail gas by the waste heat boiler 70 is specifically as follows: The tail gas coming out of the TO furnace 10 passes through the steam drum 71 and the superheater 72, and uses the heat it carries to heat the stored water in the steam drum 71. After becoming steam, it flows to the superheater 72 for secondary heating. The remaining waste liquid in the steam drum 71 flows through the waste discharge pipeline to the blowdown flash tank 75, and is discharged after being cooled and neutralized by the fresh water 74. The steam with a certain amount of heat energy is separated by the manifold and finally reaches the heat rollers, heat setting, vertical drying and other links of the subsequent process to provide heat for them. The waste gas passing through the superheater 72 will also lead to the economizer 73, and the remaining heat is used to heat the boiler feed water 76. The boiler feed water 76 flows through the pipeline to the steam drum 71 to increase the heat of the stored water in the steam drum 71, making it easier to vaporize into steam. The above process makes multiple uses of the waste gas waste heat, plays a supporting role in the subsequent process, saves energy and reduces consumption, and reduces production costs.

[0110] When the steam drum 71 or the economizer 73 has a situation of poor flow or blockage, the adjustment module receives the corresponding signal and controls the operation of the soot blower 77. According to the situation, the number and position of the soot blowers 77 to be opened can be adjusted to make the furnace body or pipeline unblocked.

[0111] In the embodiment of the present invention, the specific operation of the incineration system of the TO furnace 10 in the carbon fiber production line is as follows: Start the combustion-supporting fan 51, so that the combustion-supporting air enters the TO furnace 10 from the combustion-supporting air pipeline 50. Set the combustion-supporting fan 51 to operate at a frequency of 45HZ and the main fan at a frequency of 13HZ to purge the TO furnace 10. When the purging time reaches 180S, start ignition. The control device controls the valve on the natural gas pipeline 60 to open and introduce natural gas into the TO furnace 10. As the temperature of the TO furnace 10 rises, the control device controls the opening degree of the valve on the natural gas pipeline 60 to gradually increase, so that the gas flow of natural gas is controlled between 20 - 40m 3 / h. The temperature monitoring device continuously monitors the temperature inside the TO furnace 10. When the temperature rises to the ignition temperature of the waste gas, the control device controls the valve of the waste gas pipeline 20 valve body to open, and the waste gas generated in the carbonization furnace enters the TO furnace 10 through the waste gas pipeline 20 for incineration.

[0112] During the incineration of the waste gas, the temperature of the TO furnace 10 continues to rise. Since the waste gas itself also has its own heat, at this time, the control device controls the opening degree of the valve of the natural gas pipeline 60 to decrease, and reduces the flow rate of natural gas to 7m 3 / h. At the same time, by controlling the air volume of the fan or the opening degree of the valve body, ensure that the temperature of the TO furnace 10 is controlled between 820 - 860 °C.

[0113] The temperature monitoring device continuously monitors the temperature inside the TO furnace 10. When the temperature inside the furnace is higher than 860 °C, the control device controls the fresh air pipeline valve to open and introduce fresh air into the TO furnace 10 to reduce the temperature inside the furnace. During the actual incineration process, when the TO furnace 10 is operating stably, the natural gas flow rate is not higher than 7m3 / h, far lower than the dosage during the heating-up process. Meanwhile, the temperature of the TO furnace 10 is controlled at 820 - 860 °C to ensure that the waste gas is fully combusted and oxidized in the furnace, improve the waste gas treatment efficiency, and reduce environmental pollution.

[0114] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, may make some changes or modifications using the technical content prompted above to form equivalent embodiments of equivalent changes. The implementation schemes in the above embodiments can also be further combined or replaced. However, as long as the content does not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. A control device for the TO furnace incineration system of a carbon fiber production line, characterized in that including: a monitoring module, configured to monitor the pressure and / or temperature in the TO furnace incineration system, and transmit the monitored pressure and / or temperature parameters to the analysis module; an analysis module, receiving the pressure and / or temperature parameters transmitted by the monitoring module, analyzing the obtained pressure and / or temperature parameters, and transmitting the analysis result to the adjustment module; an adjustment module, receiving the analysis result transmitted by the analysis module, and controlling and adjusting the opening degree of the valve body on the corresponding pipeline and / or the air volume of the fan according to the received analysis result.

2. The control device for the TO furnace incineration system of the carbon fiber production line according to claim 1, wherein the monitoring module includes: a first monitoring module and a second monitoring module, configured to monitor the temperature in different areas of the TO furnace incineration system, and transmit the monitored temperature parameters to the analysis module; the analysis module, receiving the first temperature monitored by the first monitoring module and the second temperature monitored by the second monitoring module, obtaining the difference between the two, comparing the difference with the preset temperature range value, and transmitting the comparison result to the adjustment module; the adjustment module, receiving the comparison result transmitted by the analysis module, and adjusting the opening degree of the valve body on the combustion-supporting air pipeline and / or the fresh air pipeline according to the comparison result.

3. The control device for the TO furnace incineration system of the carbon fiber production line according to claim 2, wherein the analysis module calculates the difference between the first temperature monitored by the first monitoring module and the second temperature monitored by the second monitoring module, and transmits the difference to the judgment module provided in the analysis module; the judgment module receives the difference transmitted by the analysis module, judges that the difference exceeds the preset range value, and transmits the judgment result to the adjustment module; the adjustment module receives the judgment result of the judgment module, and according to the judgment result, adjusts the opening degree of the valve body on the combustion-supporting air pipeline and / or the fresh air pipeline to increase, and introduce sufficient combustion-supporting air and / or fresh air into the TO furnace.

4. The control device for the TO furnace incineration system of the carbon fiber production line according to claim 2, wherein the monitoring module includes: a third monitoring module, configured to monitor the pressure in the combustion-supporting air pipeline of the TO furnace incineration system, and transmit the monitored pressure parameter to the analysis module; the analysis module, receiving the pressure parameter in the combustion-supporting air pipeline monitored by the third monitoring module, comparing it with the preset pressure value in the combustion-supporting air pipeline, and transmitting the comparison result to the adjustment module; the adjustment module, receiving the comparison result transmitted by the analysis module, and adjusting the opening degree of the valve body on the combustion-supporting air pipeline and / or the air volume of the fan according to the comparison result.

5. The control device for the TO furnace incineration system of the carbon fiber production line according to claim 4, wherein the analysis module obtains the pressure parameter in the combustion-supporting air pipeline monitored by the third monitoring module, and transmits the pressure parameter to the judgment module provided in the analysis module; the judgment module receives the pressure parameter transmitted by the analysis module, judges that the pressure in the combustion-supporting air pipeline monitored by the third monitoring module is higher than the preset pressure value in the combustion-supporting air pipeline, and transmits the judgment result to the adjustment module; the adjustment module receives the judgment result of the judgment module, and according to the judgment result, controls the opening degree of the valve body on the combustion-supporting air pipeline to increase or controls the air volume of the fan on the combustion-supporting air pipeline by the adjustment module to decrease; Alternatively, the judgment module receives the pressure parameter transmitted by the analysis module, determines that the pressure in the combustion-supporting air pipeline monitored by the third monitoring module is lower than the preset pressure value in the combustion-supporting air pipeline, and transmits the judgment result to the adjustment module; The adjustment module receives the judgment result of the judgment module, and controls the opening of the valve body on the combustion-supporting air pipeline to decrease or the adjustment module controls the air volume of the fan on the combustion-supporting air pipeline to increase according to the judgment result.

6. The control device of the TO furnace incineration system for a carbon fiber production line according to claim 4, wherein The monitoring module includes: a fourth monitoring module for monitoring the pressure in the waste gas pipeline of the TO furnace incineration system and transmitting the monitored pressure parameter to the analysis module; The analysis module receives the pressure parameter of the waste gas pipeline monitored by the fourth monitoring module, compares it with the preset pressure value in the waste gas pipeline, 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 of the valve body on the waste gas pipeline and / or the air volume of the fan according to the comparison result.

7. The control device of the TO furnace incineration system for a carbon fiber production line according to claim 6, wherein The analysis module obtains the pressure parameter of the waste gas pipeline monitored by the fourth 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, determines that the pressure in the waste gas pipeline monitored by the fourth monitoring module is higher than the preset pressure value in the waste gas pipeline, and transmits the judgment result to the adjustment module; The adjustment module receives the judgment result of the judgment module, and controls the opening of the valve body on the waste gas pipeline to increase or the adjustment module controls the air volume of the fan on the waste gas pipeline to decrease according to the judgment result; Alternatively, the judgment module receives the pressure parameter transmitted by the analysis module, determines that the pressure in the waste gas pipeline monitored by the fourth monitoring module is lower than the preset pressure value in the waste gas pipeline, and transmits the judgment result to the adjustment module; The adjustment module receives the judgment result of the judgment module, and controls the opening of the valve body on the waste gas pipeline to decrease or the adjustment module controls the air volume of the fan on the waste gas pipeline to increase according to the judgment result.

8. The control device of the TO furnace incineration system for a carbon fiber production line according to claim 6, wherein The monitoring module includes: a fifth monitoring module for monitoring the temperature in the nitrogen pipeline of the TO furnace incineration system and transmitting the monitored temperature parameter to the analysis module; The analysis module receives the temperature parameter of the nitrogen pipeline monitored by the fifth monitoring module, compares it with the preset temperature range value in the nitrogen pipeline, and transmits the comparison result to the adjustment module; The adjustment module receives the comparison result transmitted by the analysis module, and controls the opening and closing of the valve body on the nitrogen pipeline according to the comparison result.

9. The control device of the TO furnace incineration system for a carbon fiber production line according to claim 8, wherein The analysis module obtains the temperature parameter of the nitrogen pipeline monitored by the fifth monitoring module and transmits the temperature parameter to the judgment module set in the analysis module; The judgment module receives the temperature parameter transmitted by the analysis module, determines that the temperature in the nitrogen pipeline monitored by the fifth monitoring module exceeds the preset range value of the temperature in the nitrogen pipeline, and transmits the judgment result to the adjustment module; The adjustment module receives the judgment result of the judgment module and controls the opening of the valve body on the nitrogen pipeline according to the judgment result to introduce nitrogen into the TO furnace.

10. The control device of the TO furnace incineration system of the carbon fiber production line according to claim 8, characterized in that The monitoring module includes: a sixth monitoring module for monitoring the temperature in the waste heat boiler in the TO furnace incineration system and transmitting the monitored temperature parameter to the analysis module; The analysis module receives the temperature parameters before and after the tail gas heat exchange in the waste heat boiler monitored by the sixth monitoring module, calculates the difference in temperature before and after the heat exchange, and transmits the difference to the judgment module set in the analysis module; The judgment module receives the temperature difference transmitted by the analysis module, determines that the difference is less 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 the operation of the soot blower in the waste heat boiler according to the judgment result to clean the steam drum and / or economizer in the waste heat boiler.

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