Roller hearth type steel plate heat treatment furnace system and control method

Abstract

The invention provides a roller hearth type steel plate heat treatment furnace system and a control method. The roller hearth type steel plate heat treatment furnace system comprises a protective atmosphere roller hearth type heat treatment furnace, an open fire heating roller hearth type heat treatment furnace and a desulfurization and denitrification device. The protective atmosphere roller hearth type heat treatment furnace is provided with a combined heat supply structure of a radiant tube and a self-preheating burner, a nitrogen preheater and an air preheater are arranged in a smoke exhaust system of the protective atmosphere roller hearth type heat treatment furnace, and nitrogen and air are preheated through smoke waste heat and are conveyed back to a hearth and the burner respectively. The open fire heating roller hearth type heat treatment furnace is provided with a high-speed burner and a concentrated smoke exhaust system, an air heat exchanger and a fuel gas heat exchanger are arranged in the smoke exhaust system, and air and fuel gas are preheated through flue gas waste heat and conveyed back to the high-speed burner; and smoke exhaust systems of the protective atmosphere roller hearth type heat treatment furnace and the open fire heating roller hearth type heat treatment furnace gather the preheated smoke to the desulfurization and denitrification device for desulfurization and denitrification treatment, and then the smoke is exhausted.

Description

Technical Field

[0001] The present application relates to the field of smelting and processing, and in particular to a roller hearth steel plate heat treatment furnace system and a control method. Background Art

[0002] Steel plate heat treatment workshops are generally equipped with a protective atmosphere roller-hearth heat treatment furnace (quenching furnace or normalizing furnace) and an open flame heated roller-hearth tempering furnace according to process requirements. The protective atmosphere roller-hearth heat treatment furnace uses multiple sets of radiant tubes and self-preheating burners to provide the heat required for steel plate heat treatment. The furnace temperature is ~1000°C, and the flue gas is drawn out from the exhaust pipe of each set of burners, with a maximum temperature of ~600°C. To protect the exhaust fan, the exhaust pipe needs to be designed with an open bell-shaped mouth, drawing in cold air from the environment to reduce the flue gas temperature to ~300°C. The flue gas is finally discharged through the chimney by the exhaust fan, resulting in the flue gas's waste heat not being fully recovered and utilized. The protective gas is usually directly introduced into the furnace to ensure the furnace atmosphere required for steel plate heat treatment. Some roller-hearth tempering furnaces heated by open flames use self-preheating burners + dispersed smoke exhaust, with furnace temperatures up to 800°C. Similar to protective atmosphere roller-hearth heat treatment furnaces, they all require cold air to be drawn from the environment to reduce the flue gas temperature to protect the exhaust fan, resulting in energy waste. Others use high-speed burners + centralized exhaust, adding air to the centralized flue and recovering waste heat through a gas heat exchanger. The flue gas is eventually discharged through the chimney by the exhaust fan. During low-temperature tempering, the furnace temperature uniformity is poor and cannot meet process requirements. Among them, the high-speed burner has a combustion chamber of its own. After the fuel and air are mixed, they are basically completely burned (more than 85%) in the combustion chamber. The high-temperature gas is ejected from the convergent port at a high speed of 90-120m / s due to the gas combustion expansion pressure, and can reach up to 300m / s. The main fuels used by high-speed burners are gaseous and liquid fuels. There are cold and hot air burners. Hot air burners are divided into external heating type and self-preheating type. High-speed burners are mainly used in industrial furnaces. Compared with ordinary burners, they have a larger adjustment ratio, which can reach 1 to 50. The flue gas from heat treatment furnaces is usually discharged directly into the atmosphere without dust removal, desulfurization and denitrification, polluting the environment. Summary of the Invention

[0003] The purpose of this application is to provide a roller-hearth steel plate heat treatment furnace system and control method to solve the problems of waste of flue gas waste heat, high unit consumption and low thermal efficiency in protective atmosphere roller-hearth heat treatment furnaces and open flame heated roller-hearth heat treatment furnaces, as well as the problem of furnace temperature uniformity during low-temperature tempering of fire heated roller-hearth heat treatment furnaces and the problem of protective atmosphere roller-hearth heat treatment furnaces affecting furnace temperature uniformity due to the filling of protective atmosphere into the furnace.

[0004] To achieve the above-mentioned purpose, the roller-bottom steel plate heat treatment furnace system provided in the present application specifically includes a protective atmosphere roller-bottom heat treatment furnace, an open flame heating roller-bottom heat treatment furnace and a desulfurization and denitrification device; the protective atmosphere roller-bottom heat treatment furnace is provided with a combined heating structure of a radiation tube and a self-preheating burner, and a nitrogen preheater and an air preheater are provided in its exhaust system, and the nitrogen and air are preheated by the waste heat of the flue gas, and are respectively returned to the furnace and the burner; the open flame heating roller-bottom heat treatment furnace is provided with a high-speed burner and a centralized exhaust system, and an air heat exchanger and a gas heat exchanger are provided in its exhaust system, and the air and gas are preheated by the waste heat of the flue gas, and are returned to the high-speed burner; the exhaust systems of the protective atmosphere roller-bottom heat treatment furnace and the open flame heating roller-bottom heat treatment furnace collect the preheated flue gas to the desulfurization and denitrification device for desulfurization and denitrification treatment and then discharge it.

[0005] In the above-mentioned roller hearth steel plate heat treatment furnace system, optionally, the nitrogen preheater is arranged on the centralized flue, and is used to preheat the nitrogen to 300-400°C with the waste heat of the flue gas before passing it into the furnace; the air preheater is arranged downstream of the nitrogen preheater, and is used to preheat the air to 150-200°C with the waste heat of the flue gas before conveying it to the self-preheating burner.

[0006] In the above-mentioned roller hearth steel plate heat treatment furnace system, optionally, the air heat exchanger and the gas heat exchanger are arranged on a centralized flue; wherein, the air heat exchanger and the gas heat exchanger respectively preheat the air to 300-350°C by the waste heat of the flue gas, and preheat the gas to 150-180°C before transporting it to the high-speed burner.

[0007] In the above-mentioned roller hearth steel plate heat treatment furnace system, optionally, the open flame heated roller hearth heat treatment furnace includes a circulation fan, and the circulation fan is arranged on the top of the heat treatment furnace of the open flame heated roller hearth heat treatment furnace, and is used to force furnace gas circulation during low-temperature heat treatment.

[0008] In the above roller hearth steel plate heat treatment furnace system, optionally, the circulating fan forms forced convection in the furnace chamber, so that the furnace temperature uniformity during low-temperature heat treatment reaches ±5°C.

[0009] In the above-mentioned roller hearth steel plate heat treatment furnace system, optionally, the protective atmosphere roller hearth heat treatment furnace includes a nitrogen pipeline, which is distributed along both sides of the furnace body and connected to the furnace through a quick-cut valve; the nitrogen is heated by a nitrogen preheater and then injected into the furnace in a pulse-controlled manner to form a protective atmosphere.

[0010] In the above-mentioned roller hearth steel plate heat treatment furnace system, optionally, the open flame heated roller hearth heat treatment furnace includes a plurality of high-speed burners, the plurality of high-speed burners are arranged in parallel and are respectively connected to the gas heat exchanger and the air heat exchanger through the gas pipeline and the air pipeline, manual valves and quick-cut valves are provided on the gas pipeline and the air pipeline, and the combustion intensity is adjusted by the automation system.

[0011] In the above-mentioned roller-hearth steel plate heat treatment furnace system, optionally, the desulfurization and denitrification device includes a supplementary heat module and an ammonia injection module; the supplementary heat system controls the flue gas temperature to meet the denitrification reaction conditions by adjusting the opening of the flue dampers of the protective atmosphere roller-hearth heat treatment furnace and the open flame heating roller-hearth heat treatment furnace; the ammonia injection system injects a reducing agent into the flue gas and reduces the nitrogen oxide content in combination with the denitrification reactor.

[0012] In the above roller hearth steel plate heat treatment furnace system, optionally, a portion of the exhaust pipe of the self-preheating burner is a closed structure, and the flue gas is discharged through the radiation tube and then collected into a centralized flue.

[0013] The present application also provides a control method for the roller-bottom steel plate heat treatment furnace system, the method comprising: in a protective atmosphere roller-bottom heat treatment furnace, heating the steel plate by a combined heating structure of a radiation tube and a self-preheating burner, and utilizing the waste heat of the flue gas of its exhaust system to preheat nitrogen to 400°C and air to 200°C, introducing the preheated nitrogen into the furnace to form a protective atmosphere, and conveying the preheated air to the self-preheating burner to participate in combustion; in an open flame heating roller-bottom heat treatment furnace, heating the steel plate by a high-speed burner and a centralized exhaust system, and utilizing the waste heat of the flue gas of its exhaust system to preheat air to 350°C and gas to 180°C, and conveying the preheated air and gas to the high-speed burner to participate in combustion; and collecting the exhaust gases of the two heat treatment furnaces to a desulfurization and denitrification device, and discharging the flue gas after desulfurization and denitrification treatment.

[0014] The present application also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned method when executing the computer program.

[0015] The present application also provides a computer-readable storage medium, which stores a computer program for executing the above method.

[0016] The present application also provides a computer program product, comprising a computer program / instruction, which implements the steps of the above method when executed by a processor.

[0017] The beneficial technical effects of this application are as follows: a protective atmosphere roller-hearth heat treatment furnace is equipped with a nitrogen preheater and an air preheater on the centralized flue to recover flue gas waste heat. The preheated nitrogen is then introduced into the furnace to form a protective atmosphere, reducing the impact on furnace temperature uniformity. The preheated air is then introduced into each set of burners in the heat treatment furnace for combustion, providing the heat required for steel plate heat treatment. An open flame heated roller-hearth heat treatment furnace is equipped with an air and gas heat exchanger on the centralized flue to recover flue gas waste heat. The preheated air and gas are then introduced into each set of burners in the heat treatment furnace for combustion, providing the heat required for steel plate heat treatment. Furthermore, multiple sets of circulating fans are installed on the furnace roof, and a burner pulse combustion + forced flue gas circulation method is used during low-temperature heat treatment to improve furnace temperature uniformity. The flue gas from the protective atmosphere roller-hearth heat treatment furnace and the open flame heated roller-hearth heat treatment furnace, after heat exchange in the preheater, is then fed into a desulfurization and denitrification device for dust removal and reduction of harmful gas content, ensuring that the flue gas meets environmental emission requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application, constitute a part of the present application, and do not constitute a limitation of the present application. In the drawings:

[0019] Figure 1 A schematic structural diagram of a heat treatment furnace system provided in one embodiment of the present application;

[0020] Figure 2 A schematic structural diagram of a protective atmosphere heat treatment furnace provided in one embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of an open flame heating heat treatment furnace provided in one embodiment of the present application;

[0022] Figure 4 A schematic structural diagram of a protective atmosphere system provided in one embodiment of the present application;

[0023] Figure 5 This is a schematic structural diagram of a combustion system for an open flame heating heat treatment furnace provided in one embodiment of the present application;

[0024] Figure 6 A flow chart of a control method provided in one embodiment of the present application;

[0025] Figure 7 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0026] The following will describe in detail the implementation methods of this application in conjunction with the accompanying drawings and examples, so that the application can fully understand how technical means are used to solve technical problems and achieve technical effects, and implement them accordingly. It should be noted that as long as there is no conflict, the various embodiments and the various features in each embodiment of this application can be combined with each other, and the resulting technical solutions are all within the scope of protection of this application.

[0027] Additionally, the steps shown in the flowcharts of the accompanying drawings may be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown.

[0028] The roller-bottom steel plate heat treatment furnace system provided in the present application specifically includes a protective atmosphere roller-bottom heat treatment furnace, an open flame heating roller-bottom heat treatment furnace and a desulfurization and denitrification device; the protective atmosphere roller-bottom heat treatment furnace is provided with a combined heating structure of a radiation tube and a self-preheating burner, and a nitrogen preheater and an air preheater are provided in its exhaust system, and the nitrogen and air are preheated by the waste heat of the flue gas, and are respectively returned to the furnace and the burner; the open flame heating roller-bottom heat treatment furnace is provided with a high-speed burner and a centralized exhaust system, and an air heat exchanger and a gas heat exchanger are provided in its exhaust system, and the air and gas are preheated by the waste heat of the flue gas, and are returned to the high-speed burner; the exhaust systems of the protective atmosphere roller-bottom heat treatment furnace and the open flame heating roller-bottom heat treatment furnace collect the flue gas after preheating treatment to the desulfurization and denitrification device for desulfurization and denitrification treatment before being discharged.

[0029] In the above embodiment, the nitrogen preheater is arranged on the centralized flue, and is used to preheat the nitrogen to 300-400°C by using the waste heat of the flue gas before passing it into the furnace; the air preheater is arranged downstream of the nitrogen preheater, and is used to preheat the air to 150-200°C by using the waste heat of the flue gas before conveying it to the self-preheating burner; the air heat exchanger and the gas heat exchanger are arranged on the centralized flue; wherein, the air heat exchanger and the gas heat exchanger respectively preheat the air to 300-350°C by using the waste heat of the flue gas, and preheat the gas to 150-180°C before conveying it to the high-speed burner.

[0030] Please refer to Figure 1As shown in the figure, in practice, a protective atmosphere roller-hearth heat treatment furnace utilizes multiple sets of radiant tubes and self-preheating burners to provide the heat required for steel plate heat treatment. Some burner exhaust pipes are sealed, eliminating the need for cold air intake from the atmosphere. Nitrogen and air preheaters are installed in the centralized flue to fully utilize the flue gas heat to preheat nitrogen to ~400°C and air to ~200°C. The preheated nitrogen is injected into the furnace chamber, minimizing the impact on furnace temperature uniformity. The preheated air enters the burners and participates in combustion, raising the combustion temperature and reducing unit energy consumption. The flue gas temperature after the nitrogen preheater is ~300°C and is exhausted through the exhaust fan. Open-flame heated roller-hearth heat treatment furnaces utilize high-speed burners and centralized exhaust. An air and gas heat exchanger is installed in the centralized flue to fully utilize the flue gas heat to preheat the air to ~350°C and the gas to ~180°C. The preheated air and gas enter the high-speed burners for full combustion, providing the heat required for steel plate heat treatment. Both heat treatment furnaces preheat the furnace medium by recycling the flue gas heat, and finally return it to the furnace, which improves the thermal efficiency of the furnace and reduces the unit consumption. The hot-fired roller-hearth heat treatment furnace adopts the flue gas forced circulation method in the soaking section, which improves the temperature uniformity of the furnace during low-temperature heat treatment. The flue gas after heat exchange in the preheater of the two heat treatment furnaces is discharged by their respective exhaust fans and enters the desulfurization and denitrification device (including the supplementary heat system, ammonia injection system, desulfurization and denitrification reactor, exhaust fan, etc.) Figure 1 The flue gas that finally meets the environmental protection requirements is discharged into the atmosphere through the chimney.

[0031] In one embodiment of the present application, the exhaust pipe of the self-preheating burner is partially of a closed structure, and the smoke is discharged through the radiation tube and then collected in a centralized flue. The protective atmosphere roller-bottom heat treatment furnace includes a nitrogen pipeline, which is distributed along both sides of the furnace body and is connected to the furnace through a quick-cut valve; the nitrogen is heated by a nitrogen preheater and injected into the furnace in a pulse-controlled manner to form a protective atmosphere. The open flame heated roller-bottom heat treatment furnace includes a plurality of high-speed burners, which are arranged in parallel and are respectively connected to a gas heat exchanger and an air heat exchanger through a gas pipeline and an air pipeline. Manual valves and quick-cut valves are provided on the gas pipeline and the air pipeline, and the combustion intensity is adjusted by an automated system.

[0032] For details, please refer to Figure 2 As shown in the figure, in actual work, the protective atmosphere roller hearth heat treatment furnace consists of steel structure 1, furnace bottom roller 2, refractory material 3, combustion system, smoke exhaust system, protective atmosphere system (such as Figure 4 The combustion system includes a combustion-supporting fan, a radiation tube 4, a self-preheating burner 5, air and gas pipelines, manual valves on the pipelines, and a quick-cut valve 6. The smoke exhaust system includes a smoke exhaust fan, a smoke pipe, a nitrogen heat exchanger, an air heat exchanger (such as Figure 1 Protective atmosphere system (as shown). Figure 4The radiant tube 4 + self-preheating burner 5 + pipeline quick-cut valve 6 can realize pulse combustion of the burner through the automatic control system, making the furnace temperature uniform and meeting the temperature requirements of steel plate heat treatment. The flue gas generated by combustion first exchanges heat with the combustion air in the self-preheating burner. The air is preheated to 550℃. The flue gas is collected from the exhaust pipes of each burner to the centralized flue and then heated to the nitrogen heat exchanger (such as Figure 1 As shown) preheat nitrogen to 400℃, and nitrogen passes through the protective atmosphere system (as shown) Figure 4 The quick-cut valve on the pipeline (as shown) enters the furnace in a pulse-controlled manner to form a protective atmosphere in the furnace to prevent steel plate oxidation; an air heat exchanger is set after the nitrogen heat exchanger (as shown Figure 1 As shown), the flue gas waste heat is used to preheat the air to ~200℃, and the preheated air is sent to each preheating burner to mix with the gas and burn to provide the heat required for the heat treatment of the steel plate; the air preheater (as shown) Figure 1 The flue gas at (as shown) is discharged by the exhaust fan into the combined flue of the two heat treatment furnaces.

[0033] Please refer to Figure 3 As shown, the open flame heated roller hearth heat treatment furnace consists of a steel structure 7, furnace bottom rollers 8, refractory materials 9, a combustion system (such as Figure 5 As shown), circulating fan 10 and automatic control system. Combustion system (as shown Figure 5 As shown) includes a combustion-supporting fan, a high-speed burner 11, air and gas pipelines and manual valves on the pipelines and a quick-cut valve 12 flue and air preheater, gas preheater, exhaust fan (such as Figure 3 High-speed burners 11 and pipeline quick-cut valves 12 utilize an automated control system to achieve pulsed combustion, ensuring uniform furnace temperature and meeting the medium-to-high temperature requirements of steel plate heat treatment. The flue gas generated by high-speed burners 11 is drawn into a centralized flue, where it is preheated to 350°C in an air heat exchanger and to 180°C in a gas heat exchanger. The preheated air and gas are then delivered to each high-speed burner 11 for mixed combustion, providing the heat required for steel plate heat treatment. The flue gas exiting the gas preheater is discharged by the exhaust fan into the combined flue of the two heat treatment furnaces.

[0034] Furthermore, in the above embodiment, the open flame heated roller hearth heat treatment furnace includes a circulation fan, which is arranged on the furnace top of the open flame heated roller hearth heat treatment furnace and is used to force furnace gas circulation during low temperature heat treatment. The circulation fan forms forced convection in the furnace, so that the furnace temperature uniformity during low temperature heat treatment reaches ±5°C. Figure 3 As shown, the furnace top circulation fan 10 causes the furnace gas to circulate strongly in the furnace during low-temperature heat treatment, thereby enhancing heat transfer and making the furnace temperature uniform, thus meeting the low temperature requirements of steel plate heat treatment.

[0035] In one embodiment of the present application, the desulfurization and denitrification device includes a supplemental heat module and an ammonia injection module. The supplemental heat system controls the flue gas temperature to meet denitrification reaction conditions by adjusting the flue damper openings of the protective atmosphere roller-hearth heat treatment furnace and the open flame heated roller-hearth heat treatment furnace. The ammonia injection system injects a reducing agent into the flue gas, which, in conjunction with the denitrification reactor, reduces nitrogen oxide content. In addition to regulating the flue gas temperature by controlling the flue damper opening, the supplemental heat system also utilizes a built-in burner for temperature regulation. Given the widespread use of supplemental heat structures in the industry, they will not be described in detail here.

[0036] Please refer to Figure 1 As shown in the figure, in actual operation, the flue gas from the two heat treatment furnaces passes through the supplemental heat system, ammonia injection system, and desulfurization and denitrification reactors. The flue gas meets all environmental protection requirements and is then discharged into the atmosphere through the exhaust fan into the chimney. The flue gas temperature required by the desulfurization and denitrification reactors is achieved by controlling the flue damper opening of each heat treatment furnace, controlling the flue gas ratio of the two furnaces, and combining the supplemental heat system to achieve the required flue gas temperature.

[0037] Please refer to Figure 6 As shown, the present application also provides a control method applicable to the roller hearth steel plate heat treatment furnace system, the method comprising:

[0038] In the protective atmosphere roller hearth heat treatment furnace S601, the steel plate is heated by a combined heating structure of radiant tubes and self-preheating burners. The flue gas waste heat from the exhaust system is used to preheat nitrogen to 400°C and air to 200°C. The preheated nitrogen is introduced into the furnace to form a protective atmosphere, and the preheated air is transported to the self-preheating burners for combustion.

[0039] S602 is a roller-hearth heat treatment furnace heated by open flames. The steel plates are heated by high-speed burners and a centralized fume exhaust system. The exhaust system's flue gas waste heat is used to preheat the air to 350°C and the gas to 180°C. The preheated air and gas are then transported to the high-speed burners for combustion.

[0040] S603 collects the exhaust gases of the two heat treatment furnaces into a desulfurization and denitrification device, desulfurizes and denitrifies the flue gases, and then discharges the flue gases.

[0041] Since the principle of solving the problem by this method is similar to that of the aforementioned roller hearth steel plate heat treatment furnace system, the implementation of this method can refer to the implementation of the roller hearth steel plate heat treatment furnace system, and the repeated parts will not be repeated.

[0042] The beneficial technical effects of this application are as follows: a protective atmosphere roller-hearth heat treatment furnace is equipped with a nitrogen preheater and an air preheater on the centralized flue to recover flue gas waste heat. The preheated nitrogen is then introduced into the furnace to form a protective atmosphere, reducing the impact on furnace temperature uniformity. The preheated air is then introduced into each set of burners in the heat treatment furnace for combustion, providing the heat required for steel plate heat treatment. An open flame heated roller-hearth heat treatment furnace is equipped with an air and gas heat exchanger on the centralized flue to recover flue gas waste heat. The preheated air and gas are then introduced into each set of burners in the heat treatment furnace for combustion, providing the heat required for steel plate heat treatment. Furthermore, multiple sets of circulating fans are installed on the furnace roof, and a burner pulse combustion + forced flue gas circulation method is used during low-temperature heat treatment to improve furnace temperature uniformity. The flue gas from the protective atmosphere roller-hearth heat treatment furnace and the open flame heated roller-hearth heat treatment furnace, after heat exchange in the preheater, is then fed into a desulfurization and denitrification device for dust removal and reduction of harmful gas content, ensuring that the flue gas meets environmental emission requirements.

[0043] The present application also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned method when executing the computer program.

[0044] The present application also provides a computer-readable storage medium, which stores a computer program for executing the above method.

[0045] The present application also provides a computer program product, comprising a computer program / instruction, which implements the steps of the above method when executed by a processor.

[0046] like Figure 7 As shown, the electronic device 600 may further include: a communication module 110, an input unit 120, an audio processor 130, a display 160, and a power supply 170. It is worth noting that the electronic device 600 does not necessarily have to include Figure 7 In addition, the electronic device 600 may also include all components shown in Figure 7 For components not shown, reference may be made to the prior art.

[0047] like Figure 7 As shown, the central processing unit 100 is sometimes also referred to as a controller or an operation control unit, and may include a microprocessor or other processor device and / or logic device. The central processing unit 100 receives inputs and controls the operations of various components of the electronic device 600 .

[0048] Memory 140 may be, for example, one or more of a cache, flash memory, hard drive, removable media, volatile memory, non-volatile memory, or other suitable devices. It may store the aforementioned failure-related information and may also store programs that execute the relevant information. The CPU 100 may execute the programs stored in memory 140 to implement information storage or processing.

[0049] The input unit 120 provides input to the CPU 100. The input unit 120 may be, for example, a keypad or touch input device. The power supply 170 is used to provide power to the electronic device 600. The display 160 is used to display objects such as images and text. The display may be, for example, an LCD display, but is not limited thereto.

[0050] The memory 140 may be a solid-state memory, such as a read-only memory (ROM), a random access memory (RAM), or a SIM card. Alternatively, it may be a memory that retains information even when power is off, can be selectively erased, and is provided with more data. Examples of such memory are sometimes referred to as EPROMs. The memory 140 may also be some other type of device. The memory 140 includes a buffer memory 141 (sometimes referred to as a buffer). The memory 140 may include an application / function storage unit 142 for storing application programs and function programs or processes for executing the operations of the electronic device 600 via the central processing unit 100.

[0051] The memory 140 may also include a data storage unit (data 143) for storing data, such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage unit (driver 144) of the memory 140 may include various driver programs for communication functions of the electronic device and / or for executing other functions of the electronic device (such as messaging applications, address book applications, etc.).

[0052] The communication module 110 is a transmitter / receiver 110 that transmits and receives signals via an antenna 111. The communication module (transmitter / receiver) 110 is coupled to the central processor 100 to provide input signals and receive output signals, which may be the same as in a conventional mobile communication terminal.

[0053] Based on different communication technologies, multiple communication modules 110 may be provided in the same electronic device, such as a cellular network module, a Bluetooth module, and / or a wireless local area network module. The communication module (transmitter / receiver) 110 is also coupled to a speaker 131 and a microphone 132 via an audio processor 130 to provide audio output via the speaker 131 and receive audio input from the microphone 132, thereby implementing common telecommunication functions. The audio processor 130 may include any suitable buffer, decoder, amplifier, etc. Furthermore, the audio processor 130 is also coupled to the central processing unit 100, enabling local recording via the microphone 132 and playback of stored audio via the speaker 131.

[0054] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0055] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0056] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0057] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0058] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A roller hearth steel plate heat treatment furnace system, characterized in that: Including protective atmosphere roller hearth heat treatment furnace, open flame heating roller hearth heat treatment furnace and desulfurization and denitrification device; The protective atmosphere roller hearth heat treatment furnace is equipped with a combined heating structure of radiant tubes and self-preheating burners. A nitrogen preheater and an air preheater are provided in the exhaust system to preheat the nitrogen and air by the waste heat of the flue gas and return them to the furnace and burner respectively. The open flame heated roller hearth heat treatment furnace is equipped with a high-speed burner and a centralized smoke exhaust system. The smoke exhaust system is equipped with an air heat exchanger and a gas heat exchanger. The air and gas are preheated by the waste heat of the flue gas and then fed back to the high-speed burner. The exhaust systems of the protective atmosphere roller hearth heat treatment furnace and the open flame heating roller hearth heat treatment furnace collect the flue gas after preheating treatment to the desulfurization and denitrification device for desulfurization and denitrification treatment before discharge.

2. The roller hearth steel plate heat treatment furnace system according to claim 1, characterized in that: The nitrogen preheater is arranged on the centralized flue, and is used to preheat the nitrogen to 300-400°C with the waste heat of the flue gas before passing it into the furnace; the air preheater is arranged downstream of the nitrogen preheater, and is used to preheat the air to 150-200°C with the waste heat of the flue gas before conveying it to the self-preheating burner.

3. The roller hearth steel plate heat treatment furnace system according to claim 1, characterized in that: The air heat exchanger and the gas heat exchanger are arranged on the centralized flue; The air heat exchanger and the gas heat exchanger respectively preheat the air to 300-350°C and preheat the gas to 150-180°C by using the waste heat of the flue gas before transporting them to the high-speed burner.

4. The roller hearth steel plate heat treatment furnace system according to claim 1, characterized in that: The open flame heated roller hearth heat treatment furnace comprises a circulation fan, which is arranged on the furnace top of the open flame heated roller hearth heat treatment furnace and is used for forcing furnace gas circulation during low temperature heat treatment.

5. The roller hearth steel plate heat treatment furnace system according to claim 4, characterized in that: The circulating fan forms forced convection in the furnace, so that the furnace temperature uniformity reaches ±5°C during low-temperature heat treatment.

6. The roller hearth steel plate heat treatment furnace system according to claim 1, characterized in that: The protective atmosphere roller hearth heat treatment furnace includes nitrogen pipelines, which are distributed along both sides of the furnace body and connected to the furnace through quick-cut valves; the nitrogen is heated by a nitrogen preheater and then injected into the furnace in a pulse-controlled manner to form a protective atmosphere.

7. The roller hearth steel plate heat treatment furnace system according to claim 1, characterized in that: The open flame heated roller hearth heat treatment furnace comprises a plurality of high-speed burners, which are arranged in parallel and connected to a gas heat exchanger and an air heat exchanger respectively through a gas pipeline and an air pipeline. Manual valves and quick-cut valves are provided on the gas pipeline and the air pipeline, and the combustion intensity is adjusted by an automated system.

8. The roller hearth steel plate heat treatment furnace system according to claim 1, characterized in that: The desulfurization and denitrification device comprises a heat supplement module and an ammonia injection module; The supplementary heat system controls the flue gas temperature to meet the denitration reaction conditions by adjusting the opening of the flue dampers of the protective atmosphere roller hearth heat treatment furnace and the open flame heating roller hearth heat treatment furnace; The ammonia injection system injects a reducing agent into the flue gas and combines with the denitration reactor to reduce the nitrogen oxide content.

9. The roller hearth steel plate heat treatment furnace system according to claim 1, characterized in that: The exhaust pipe of the self-preheating burner is partially of a closed structure, and the smoke is discharged through the radiation tube and then collected into the centralized flue.

10. A control method for a roller hearth steel plate heat treatment furnace system according to any one of claims 1 to 9, characterized in that: The method comprises: In a protective atmosphere roller hearth heat treatment furnace, the steel plate is heated by a combined heating structure of radiant tubes and self-preheating burners. The flue gas waste heat from the exhaust system is used to preheat nitrogen to 400°C and air to 200°C. The preheated nitrogen is introduced into the furnace to form a protective atmosphere, and the preheated air is transported to the self-preheating burners for combustion. In an open flame heated roller hearth heat treatment furnace, the steel plate is heated by a high-speed burner and a centralized smoke exhaust system. The waste heat of the smoke from the smoke exhaust system is used to preheat the air to 350°C and the gas to 180°C. The preheated air and gas are then transported to the high-speed burner for combustion. The exhaust gases from the two heat treatment furnaces are collected and fed to a desulfurization and denitrification device, where the flue gases are desulfurized and denitrified before being discharged.

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