Flue gas treatment system and its control method and control device

Abstract

This application discloses a flue gas treatment system and its control method and device, relating to the field of flue gas treatment technology for roasting furnaces. The flue gas treatment system includes: a waste heat recovery device connected to the roasting furnace, used to recover heat from the flue gas generated by the roasting furnace; and a carbon capture device connected to the waste heat recovery device, used to detect the flue gas output from the waste heat recovery device to determine the initial carbon content of the flue gas, and further used to adsorb carbonaceous substances in the flue gas based on the initial carbon content. This improves the flue gas treatment effect of the flue gas treatment system for roasting furnaces.

Description

Technical Field

[0001] This application relates to the field of flue gas treatment technology for roasting furnaces, and in particular to a flue gas treatment system and its control method and control device. Background Technology

[0002] Roasting furnaces are key thermal equipment in industries such as metallurgy and chemicals. Their exhaust gases are characterized by high temperature and large flow rates, containing a significant amount of recoverable waste heat. However, these gases are also a major source of carbon dioxide emissions. Realizing the recovery and utilization of waste heat from these flue gases and performing carbon capture is of great importance for industrial energy conservation and carbon reduction. However, existing flue gas treatment systems for roasting furnaces suffer from technical problems such as poor flue gas treatment efficiency. Summary of the Invention

[0003] This application provides a flue gas treatment system and its control method and control device to solve technical problems such as poor flue gas treatment effect in the prior art.

[0004] A first aspect of this application provides a flue gas treatment system for a roasting furnace, the flue gas treatment system comprising: Waste heat recovery device, which is connected to the roasting furnace, is used to recover the heat from the flue gas generated by the roasting furnace. A carbon capture device is connected to a waste heat recovery device. The carbon capture device is used to detect the flue gas output by the waste heat recovery device to determine the first carbon content of the flue gas. The carbon capture device is also used to adsorb carbonaceous substances in the flue gas based on the first carbon content.

[0005] The flue gas treatment system for the roasting furnace in this embodiment collects the flue gas generated by the roasting furnace through a waste heat recovery device and recovers the heat from the flue gas. This recovered heat is used to raise the temperature of materials during alumina production, reducing fuel consumption in the roasting furnace and thus lowering carbon emissions and harmful substance emissions. A carbon capture device detects the flue gas output from the waste heat recovery device to determine the initial carbon content of the flue gas. Based on this initial carbon content, carbonaceous substances in the flue gas are adsorbed, reducing the carbon content of the flue gas and consequently lowering the carbon emissions from the roasting furnace. With both the flue gas treatment system and the carbon capture device effectively reducing the carbon emissions from the roasting furnace, the flue gas treatment efficiency of the system is improved.

[0006] A second aspect of this application provides a control method for a flue gas treatment system. The flue gas treatment system is applied to a roasting furnace, and the flue gas treatment system is the flue gas treatment system for the roasting furnace as defined in the first aspect above. The method includes: When the roasting furnace produces flue gas, the waste heat recovery device in the flue gas treatment system is controlled to collect the flue gas produced by the roasting furnace and to recover the heat of the flue gas. After the waste heat recovery device recovers the heat of the flue gas, the carbon capture device in the control flue gas treatment system detects the flue gas output by the waste heat recovery device to determine the first carbon content of the flue gas. The carbon capture device is controlled to adsorb carbonaceous substances in flue gas based on the first carbon content.

[0007] A third aspect of this application provides a control device for a flue gas treatment system, including a processor and a memory. The memory stores a computer program, which, when executed by the processor, implements the steps of the control method for the flue gas treatment system as described in any of the above embodiments. Therefore, this control device for the flue gas treatment system possesses all the beneficial effects of the control method for the flue gas treatment system in any of the above embodiments, and will not be elaborated further here.

[0008] A fourth aspect of this application provides a readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the control method for the flue gas treatment system as described in any of the above embodiments. Therefore, this readable storage medium possesses all the beneficial effects of the control method for the flue gas treatment system in any of the above embodiments, which will not be elaborated further here. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 A schematic diagram of the flue gas treatment system for a calcining furnace provided in an embodiment of this application; Figure 2 A schematic diagram of the waste heat utilization device provided in the embodiments of this application; Figure 3 A schematic diagram of the carbon capture device provided in the embodiments of this application; Figure 4 A flowchart of the control method for the flue gas treatment system provided in the embodiments of this application; in, Figure 1 , Figure 2 and Figure 3 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100 Flue gas treatment system, 101 Waste heat recovery device, 102 Carbon capture device, 1011 Flue gas heat exchanger, 1012 Water replenishment device, 1013 Safety valve, 1014 Exhaust valve, 1021 First gas measuring device, 1022 Second gas measuring device, 1023 Adsorption tower, 1024 Programmable valve, 200 Roasting furnace. Detailed Implementation

[0011] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0012] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0013] In some embodiments, Figure 1 This is a schematic diagram of the flue gas treatment system 100 of the calcining furnace 1025 provided in the embodiments of this application, as shown below. Figure 1 As shown, an embodiment of this application provides a flue gas treatment system 100 for a calcining furnace 1025, comprising: Waste heat utilization device 101 is connected to roasting furnace 1025. Waste heat utilization device 101 is used to collect flue gas generated by roasting furnace 1025 and also to recover heat from flue gas. In this embodiment, the flue gas treatment system 100 of the roasting furnace 1025 includes a waste heat utilization device 101, which is connected to the roasting furnace 1025. The waste heat utilization device 101 is used to collect the flue gas generated by the roasting furnace 1025 and to recover the heat of the flue gas.

[0014] For example, the calcining furnace 1025 is an industrial device used for high-temperature material processing, which is widely used in chemical, metallurgical, and material preparation fields. It causes physical or chemical changes in raw materials through heating, such as dehydration, oxidation, and calcination.

[0015] For example, the flue gas produced by the roasting furnace 1025 mainly contains carbon monoxide and carbon dioxide, and also includes harmful substances such as sulfur dioxide, nitrogen oxides, and particulate matter. The specific composition varies depending on the raw materials and processes.

[0016] For example, in the production of carbon materials, the flue gas from the 1025 calcining furnace originates from the high-temperature decomposition of carbon-containing raw materials such as petroleum coke and asphalt. The flue gas not only contains high concentrations of sulfur dioxide and nitrogen oxides, but also carries a large amount of tar and the carcinogen benzo[a]pyrene.

[0017] In addition, the baking process of aluminum anodes also releases fluorides and asphalt volatiles, and gradually precipitates light oil, heavy oil and anthracene oil fractions between 170°C and 400°C. Finally, it cokes to form highly viscous smoke and dust, which can easily clog equipment and cause fire risks.

[0018] For example, a flue gas recovery pipe is provided inside the roasting furnace 1025, and the waste heat utilization device 101 is connected to the roasting furnace 1025 through the flue gas recovery pipe.

[0019] For example, during the production process of the roasting furnace 1025, the flue gas generated by the roasting furnace 1025 is input to the waste heat utilization device 101 through the flue gas recovery pipe.

[0020] For example, after recovering the heat from the flue gas, the waste heat recovery device 101 can input the recovered heat into the roasting furnace 1025, that is, provide heat for the production of the roasting furnace 1025, thereby reducing the fuel consumption of the roasting furnace 1025. In the case of reducing fuel consumption, the carbon emissions and harmful substance emissions of the roasting furnace 1025 can be reduced.

[0021] Carbon capture device 102 is connected to waste heat recovery device 101. Carbon capture device 102 is used to detect the flue gas output by waste heat recovery device 101 to determine the first carbon content of the flue gas. Carbon capture device 102 is also used to adsorb carbon substances in the flue gas according to the first carbon content.

[0022] The flue gas treatment system 100 of the roasting furnace 1025 also includes a carbon capture device 102, which is connected to the waste heat utilization device 101. The carbon capture device 102 is used to detect the flue gas output by the waste heat utilization device 101 to determine the first carbon content of the flue gas, wherein the first carbon content is the carbon content of the flue gas input to the carbon capture device 102.

[0023] For example, the first carbon content can be specifically 0 to 99%.

[0024] The carbon capture device 102 is also used to adsorb carbonaceous substances in the flue gas according to the first carbon content.

[0025] For example, carbonaceous matter can specifically be carbon monoxide and carbon dioxide in flue gas.

[0026] For example, when the first carbon content is greater than 50%, the carbon capture device 102 is controlled to adsorb carbon monoxide and carbon dioxide in the flue gas.

[0027] For example, the carbon capture device 102 is connected to the output port of the waste heat utilization device 101. After the waste heat utilization device 101 outputs the cooled flue gas, the carbon capture device 102 adsorbs the carbon substances in the cooled flue gas.

[0028] For example, the carbon capture device 102 can also adsorb substances such as carbon dioxide in flue gas.

[0029] For example, the carbon capture device 102 can reduce the carbon content of flue gas by adsorbing carbon substances in the flue gas, thereby reducing the carbon emissions of the roasting furnace 1025. Reducing carbon emissions can mitigate global warming, improve air quality, promote green economic development, and improve resource utilization efficiency.

[0030] In this embodiment, the flue gas treatment system 100 of the calcining furnace 1025 collects the flue gas generated by the calcining furnace 1025 through a waste heat utilization device 101 and recovers the heat from the flue gas. This recovered heat is used for material heating in alumina production, reducing fuel consumption of the calcining furnace 1025 and thus lowering carbon emissions and harmful substance emissions. A carbon capture device 102 detects the flue gas output from the waste heat utilization device 101 to determine the first carbon content of the flue gas. Based on this first carbon content, carbonaceous substances in the flue gas are adsorbed, reducing the carbon content of the flue gas and thus lowering carbon emissions from the calcining furnace 1025. With both the flue gas treatment system 100 and the carbon capture device 102 effectively reducing carbon emissions from the calcining furnace 1025, the flue gas treatment efficiency of the flue gas treatment system 100 is improved.

[0031] In some embodiments of this application, a flue gas treatment system 100 for a calcining furnace 1025 is provided, and a waste heat utilization device 101 includes a flue gas heat exchanger 1011 and a water replenishment device 1012. The first port of the flue gas heat exchanger 1011 is connected to the roasting furnace 1025, and the first port of the flue gas heat exchanger 1011 is used to collect the flue gas generated by the roasting furnace 1025. The second and third ports of the flue gas heat exchanger 1011 are connected to the water supply device 1012, which is used to supply water to the flue gas heat exchanger 1011 so that the flue gas heat exchanger 1011 can recover the heat of the flue gas. The fourth port of the flue gas heat exchanger 1011 is used to output the heat-exchanged flue gas.

[0032] In this embodiment, Figure 2A schematic diagram of the waste heat utilization device 101 provided in the embodiments of this application is shown below. Figure 2 As shown, the waste heat utilization device 101 includes a flue gas heat exchanger 1011 and a water replenishment device 1012.

[0033] Among them, the flue gas heat exchanger 1011 is a key device for recovering waste heat from industrial flue gas, while the water makeup device 1012 is an important component for maintaining water circulation in boilers or thermal systems. The two often work together in energy-saving systems to achieve efficient energy utilization.

[0034] For example, the flue gas heat exchanger 1011 achieves waste heat recovery by transferring heat from high-temperature flue gas to a low-temperature medium (such as hot coal water).

[0035] For example, the water replenishment device 1012 can be used to circulate hot coal water to the flue gas heat exchanger 1011.

[0036] The flue gas heat exchanger 1011 includes four ports: a first port, a second port, a third port, and a fourth port. The first port and the fourth port are connected, and the second port and the third port are connected.

[0037] The first port of the flue gas heat exchanger 1011 is connected to the roasting furnace 1025, and the flue gas heat exchanger 1011 collects the flue gas generated by the roasting furnace 1025 through the first port.

[0038] For example, the flue gas heat exchanger 1011 collects high-temperature flue gas at 180°C through a first port.

[0039] The second and third ports of the flue gas heat exchanger 1011 are connected to the water supply device 1012, which is used to supply water to the flue gas heat exchanger 1011 so that the flue gas heat exchanger 1011 can recover the heat of the flue gas.

[0040] After the flue gas heat exchanger 1011 recovers the heat from the flue gas, the flue gas heat exchanger 1011 outputs the heat-exchanged flue gas through the fourth port.

[0041] For example, the flue gas heat exchanger 1011 outputs low-temperature flue gas at 110°C through the fourth port.

[0042] For example, the water replenishment device 1012 can achieve precise replenishment of circulating heat transfer fluid. This water replenishment is an interlocking device; when the pressure drops below 0.27 MPa, the water replenishment pump and inlet valve automatically open, continuously replenishing water for 5 minutes. Once the pipeline pressure returns to the set value, the water replenishment system automatically stops operating.

[0043] In some embodiments of this application, a flue gas treatment system 100 for a roasting furnace 1025 is provided, and the waste heat utilization device 101 further includes a safety valve 1013 and an exhaust valve 1014. Safety valve 1013 and exhaust valve 1014 are installed in flue gas heat exchanger 1011. Safety valve 1013 and exhaust valve 1014 are used to adjust the pipeline pressure of flue gas heat exchanger 1011.

[0044] In this embodiment, the waste heat recovery device 101 further includes a safety valve 1013 and an exhaust valve 1014. The safety valve 1013 and the exhaust valve 1014 are disposed in the flue gas heat exchanger 1011 and are used to adjust the pipeline pressure of the flue gas heat exchanger 1011.

[0045] For example, safety valve 1013 and exhaust valve 1014 are respectively provided at both ends of flue gas heat exchanger 1011. The pipeline pressure of flue gas heat exchanger 1011 can be adjusted by adjusting the opening degree of safety valve 1013 and exhaust valve 1014.

[0046] For example, when the pipeline pressure reaches the set pressure of safety valve 1013 of 0.70MPa, the valve will open automatically immediately, and an emergency pressure relief operation will be achieved through the preset pressure relief channel.

[0047] In some embodiments, the present application provides a flue gas treatment system 100 for a roasting furnace 1025, wherein a carbon capture device 102 includes a first gas measuring device 1021, a second gas measuring device 1022, and an adsorption tower 1023. The adsorption tower 1023 is connected to the waste heat utilization device 101, the first gas measuring device 1021 is connected to the adsorption tower 1023, and the second gas measuring device is connected to the outlet of the adsorption tower 1023. The first gas measuring device 1021 is used to detect the flue gas input into the adsorption tower 1023 in order to determine the first carbon content of the flue gas; The second gas measuring device 1022 is used to detect the flue gas output from the adsorption tower 1023 in order to determine the second carbon content of the flue gas; The adsorption tower 1023 is used to adsorb carbonaceous substances in flue gas according to the first carbon content.

[0048] In this embodiment, Figure 3 This is a schematic diagram of the carbon capture device 102 provided in the embodiments of this application, as shown below. Figure 3 As shown, the carbon capture device 102 includes a first gas measuring device 1021, a second gas measuring device 1022, and an adsorption tower 1023. The adsorption tower 1023 is a device capable of adsorbing specific substances, and the first gas measuring device 1021 and the second gas measuring device 1022 are independent gas measuring devices.

[0049] For example, the first gas measuring device 1021 and the second gas measuring device 1022 are used to measure gas adsorption amount, specific surface area, pore size distribution, etc., and are important analytical tools in the fields of materials science, catalyst development, energy storage, etc.

[0050] For example, the adsorption tower 1023 uses solid adsorbents (such as activated carbon, molecular sieves, zeolites) to selectively adsorb specific components in the gas to achieve waste gas purification, gas purification or carbon capture.

[0051] The adsorption tower 1023 is connected to the waste heat utilization device 101, the first gas measuring device 1021 is connected to the adsorption tower 1023, and the second gas measuring device is connected to the outlet of the adsorption tower 1023.

[0052] The first gas measuring device 1021 is used to detect the flue gas input into the adsorption tower 1023 to determine the first carbon content of the flue gas.

[0053] The second gas measuring device 1022 is used to detect the flue gas output from the adsorption tower 1023 to determine the second carbon content of the flue gas.

[0054] For example, both the first gas measuring device 1021 and the second gas measuring device 1022 include a flow meter and a component analyzer.

[0055] For example, flow meters and component analyzers are installed in the raw gas delivery pipeline to collect raw gas data in real time. If fluctuations occur in the raw gas, the changes can be identified, and an intelligent adaptive optimization algorithm can be invoked to dynamically adjust the original control program.

[0056] The adsorption tower 1023 is used to adsorb carbonaceous substances in flue gas according to the first carbon content.

[0057] For example, the adsorption tower 1023 contains a special adsorbent to capture carbon dioxide gas in the flue gas, and the pressure operation curve of each adsorption tower 1023 is collected in real time. The intelligent adaptive optimization algorithm has a self-tuning function for the tower operating parameters, intelligently adjusting parameters such as the absorbent circulation rate and regeneration temperature to improve the capture efficiency.

[0058] In some embodiments, the present application provides a flue gas treatment system 100 for a roasting furnace 1025, and the carbon capture device 102 further includes a pressure monitoring device and a programmable valve 1024. A pressure monitoring device is installed in the adsorption tower 1023, and the pressure monitoring device is used to detect the pressure of the adsorption tower 1023. A programmable valve 1024 is installed at the outlet of the adsorption tower 1023 and is used to control the output of the adsorption tower 1023.

[0059] In this embodiment, the carbon capture device 102 further includes a pressure monitoring device and a programmable valve 1024, wherein the pressure monitoring device is a device for detecting the pressure of the adsorption tower 1023, and the programmable valve 1024 is an output control valve for the adsorption tower 1023.

[0060] A pressure monitoring device is installed in the adsorption tower 1023 to detect the pressure of the adsorption tower 1023.

[0061] For example, the pressure monitoring device detects the real-time pressure of the adsorption tower 1023. The intelligent adaptive optimization algorithm has a self-tuning function for the tower's operating parameters, intelligently adjusting parameters such as the absorbent circulation rate and regeneration temperature to improve collection efficiency.

[0062] A programmable valve 1024 is installed at the outlet of the adsorption tower 1023 and is used to control the output of the adsorption tower 1023.

[0063] For example, the programmable valve 1024 is a shut-off valve driven by pneumatic, hydraulic or other means. It can be connected to a control system to realize remote program control and is a key device in the fields of industrial automation and gas separation.

[0064] For example, the pressure swing adsorption process is achieved by controlling the valve opening and closing via a DCS (Distributed Control System) program. If the adsorption tower 1023 malfunctions, the DCS can isolate the tower and initiate an emergency reconfiguration procedure to ensure normal system operation.

[0065] For example, the waste heat utilization device 101 integrates intelligent safety control technology to achieve adaptive and precise control of the flow rate and pressure of the circulating medium, effectively avoiding safety hazards such as low flow interruption and overpressure leakage. The carbon capture device 102 is equipped with an adaptive optimization algorithm and a multi-tower intelligent switching system with built-in microcomputer self-control diagnosis. It can automatically optimize the operating program and adjust key parameters according to the dynamic changes in the flow rate and composition of the raw gas, ensuring the dynamic adaptability of the device to changes in operating conditions. At the same time, it supports the automatic isolation of the faulty adsorption tower 1023 and the intelligent reorganization of the remaining tower groups, realizing the uninterrupted delivery of qualified product gas to the downstream work area, significantly avoiding the risk of unplanned system downtime. The system constructs a full-process intelligent alarm monitoring system to provide comprehensive early warning protection for safe and stable operation. This invention comprehensively improves the safety, stability and intelligent operation level of the waste heat utilization and carbon capture process of the calcining furnace 1025.

[0066] In some embodiments, Figure 4 A flowchart of the control method for the flue gas treatment system provided in the embodiments of this application is shown below. Figure 4As shown, an embodiment of this application provides a control method for a flue gas treatment system. The flue gas treatment system is the flue gas treatment system for the roasting furnace in any of the above embodiments, comprising: Step S401: When the roasting furnace generates flue gas, control the waste heat utilization device in the flue gas treatment system to collect the flue gas generated by the roasting furnace and control the waste heat utilization device to recover the heat of the flue gas. Step S402: After the waste heat recovery device recovers the heat of the flue gas, the carbon capture device in the flue gas treatment system is controlled to detect the flue gas output by the waste heat recovery device in order to determine the first carbon content of the flue gas. Step S403: Control the carbon capture device to adsorb carbonaceous substances in the flue gas according to the first carbon content.

[0067] In this embodiment, the roasting furnace generates flue gas during the start-up process.

[0068] When the roasting furnace produces flue gas, the waste heat recovery device in the flue gas treatment system is controlled to collect the flue gas produced by the roasting furnace and to recover the heat of the flue gas.

[0069] After the waste heat recovery device recovers the heat from the flue gas, the carbon capture device in the control flue gas treatment system detects the flue gas output from the waste heat recovery device to determine the first carbon content of the flue gas.

[0070] The carbon capture device is controlled to adsorb carbonaceous substances in the flue gas based on the first carbon content, thereby reducing the carbon content in the flue gas.

[0071] The control method of the flue gas treatment system in this embodiment collects the flue gas generated by the roasting furnace through a waste heat recovery device and recovers the heat from the flue gas. By inputting the recovered heat back into the roasting furnace to provide heat for its production, the fuel consumption of the roasting furnace can be reduced, thereby lowering carbon emissions and harmful substance emissions. A carbon capture device detects the flue gas output from the waste heat recovery device to determine the initial carbon content of the flue gas. Based on this initial carbon content, carbonaceous substances in the flue gas are adsorbed, reducing the carbon content of the flue gas and thus lowering the carbon emissions from the roasting furnace. With both the flue gas treatment system and the carbon capture device reducing the carbon emissions from the roasting furnace, the flue gas treatment effect of the roasting furnace is improved.

[0072] In some embodiments, this application provides a control method for a flue gas treatment system. After controlling carbon capture to adsorb carbonaceous substances in the flue gas according to a first carbon content, the method further includes: The flue gas output from the carbon capture device is detected to determine the secondary carbon content of the flue gas; Under the condition that the second carbon content is less than the content threshold, the emission of flue gas from the carbon capture device is controlled.

[0073] In this embodiment, the flue gas output from the carbon capture device is detected to determine the second carbon content of the flue gas.

[0074] If the second carbon content is less than the content threshold, it means that the treated flue gas has met the standard, and the emission of flue gas from the carbon capture device can be controlled.

[0075] For example, if the second carbon content is greater than the content threshold, it means that the treated flue gas does not meet the standard, so the carbon capture device must not emit flue gas.

[0076] For example, when the second carbon content is greater than the content threshold, it is necessary to control the carbon capture device to reprocess the flue gas.

[0077] In some embodiments, this application provides a control method for a flue gas treatment system. After controlling carbon capture to adsorb carbonaceous substances in the flue gas according to a first carbon content, the method further includes: During the operation of the flue gas treatment system, the flow rate and pressure parameters of the flue gas in the system are monitored. When the flow rate is less than the flow rate threshold or the pressure parameter is greater than the pressure threshold, the flue gas treatment system will stop working.

[0078] In this embodiment, during the operation of the flue gas treatment system, the flow rate data and pressure parameters of the flue gas in the flue gas treatment system are detected, wherein the flow rate data represents the real-time flow rate of the flue gas, and the pressure parameters represent the real-time pressure of the flue gas.

[0079] If the flow rate is less than the flow rate threshold or the pressure parameter is greater than the pressure threshold, it indicates that the flue gas treatment system is malfunctioning and needs to be shut down.

[0080] For example, if the flow rate data is greater than the flow rate threshold, it indicates that the flue gas treatment system is operating normally.

[0081] For example, if the pressure parameter is less than the pressure threshold, it indicates that the flue gas treatment system is operating normally.

[0082] In some embodiments, a control device for a roasting furnace is provided. The control device includes a processor and a memory. The memory stores a computer program that, when executed by the processor 702, implements the steps of the control method for the flue gas treatment system as described in any of the above embodiments. Therefore, this control device for the roasting furnace possesses all the beneficial effects of the control method for the flue gas treatment system in any of the above embodiments, which will not be elaborated further here.

[0083] In some embodiments, a readable storage medium is provided having a program stored thereon, which, when executed by a processor, implements the steps of the control method of the flue gas treatment system as described in any of the above embodiments, and thus has all the beneficial technical effects of the control method of the flue gas treatment system as described in any of the above embodiments.

[0084] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0085] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-readable program code.

[0086] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0087] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0088] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1The steps of the function specified in one or more boxes.

[0089] This application also provides a computer program product, which includes computer software instructions that, when executed on a processing device, cause the processing device to execute a control method for a flue gas treatment system.

[0090] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0091] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0092] In the several embodiments provided in this application, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between devices or units, and may be electrical, mechanical, or other forms.

[0093] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0094] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0095] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0096] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0097] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0098] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A flue gas treatment system of a roaster, characterized by, The flue gas treatment system includes: Waste heat recovery device, which is connected to the roasting furnace, is used to recover the heat from the flue gas generated by the roasting furnace; A carbon capture device is connected to the waste heat recovery device. The carbon capture device is used to detect the flue gas output by the waste heat recovery device to determine the first carbon content of the flue gas. The carbon capture device is also used to adsorb carbonaceous substances in the flue gas according to the first carbon content.

2. The flue gas treatment system according to claim 1, characterized in that, The waste heat utilization device includes a flue gas heat exchanger and a water supply device; The first port of the flue gas heat exchanger is connected to the roasting furnace, and the first port of the flue gas heat exchanger is used to collect the flue gas generated by the roasting furnace. The second and third ports of the flue gas heat exchanger are connected to the water replenishment device, which is used to replenish water to the flue gas heat exchanger so that the flue gas heat exchanger can recover the heat of the flue gas. The fourth port of the flue gas heat exchanger is used to output the heat-exchanged flue gas.

3. The flue gas treatment system according to claim 2, characterized in that, The waste heat utilization device also includes a safety valve and an exhaust valve; The safety valve and the exhaust valve are installed in the flue gas heat exchanger, and the safety valve and the exhaust valve are used to adjust the pipeline pressure of the flue gas heat exchanger.

4. The flue gas treatment system according to any one of claims 1 to 3, characterized in that, The carbon capture device includes a first gas measuring device, a second gas measuring device, and an adsorption tower; The adsorption tower is connected to the waste heat utilization device, the first gas measuring device is connected to the adsorption tower, and the second gas measuring device is connected to the outlet of the adsorption tower. The first gas measuring device is used to detect the flue gas input into the adsorption tower in order to determine the first carbon content of the flue gas; The second gas measuring device is used to detect the flue gas output from the adsorption tower in order to determine the second carbon content of the flue gas; The adsorption tower is used to adsorb carbonaceous substances in the flue gas according to the first carbon content.

5. The flue gas treatment system according to claim 4, characterized in that, The carbon capture device also includes a pressure monitoring device and a programmable valve; The pressure monitoring device is installed in the adsorption tower and is used to detect the pressure of the adsorption tower. The programmable valve is located at the outlet of the adsorption tower and is used to control the output of the adsorption tower.

6. A control method of a flue gas treatment system, characterized by, The flue gas treatment system is applied to a roasting furnace, and the flue gas treatment system is the flue gas treatment system for the roasting furnace according to any one of claims 1 to 5, and the method includes: When the roasting furnace produces flue gas, the waste heat recovery device in the flue gas treatment system is controlled to collect the flue gas produced by the roasting furnace and to recover the heat of the flue gas. After the waste heat recovery device recovers the heat of the flue gas, the carbon capture device in the flue gas treatment system is controlled to detect the flue gas output by the waste heat recovery device in order to determine the first carbon content of the flue gas. The carbon capture device is controlled to adsorb carbonaceous substances in the flue gas according to the first carbon content.

7. The method of claim 6, wherein, After controlling the carbon capture to adsorb carbonaceous substances in the flue gas according to the first carbon content, the method further includes: The flue gas output from the carbon capture device is detected to determine the second carbon content of the flue gas; When the second carbon content is less than the content threshold, the carbon capture device is controlled to emit the flue gas.

8. The method according to claim 6 or 7, characterized in that, After controlling the carbon capture to adsorb carbonaceous substances in the flue gas according to the first carbon content, the method further includes: During the operation of the flue gas treatment system, the flow rate data and pressure parameters of the flue gas in the flue gas treatment system are detected; When the flow rate is less than the flow rate threshold or the pressure parameter is greater than the pressure threshold, the flue gas treatment system is controlled to stop working.

9. A control device of a flue gas treatment system, characterized by include: processor; A memory, which stores programs or instructions, wherein a processor, when executing the programs or instructions in the memory, implements the steps of the control method for the flue gas treatment system as described in any one of claims 6 to 8.

10. A readable storage medium, characterized by, A program or instructions are stored on a readable storage medium, which, when executed by a processor, implement the steps of the control method for the flue gas treatment system as described in any one of claims 6 to 8.

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