An energy efficiency monitoring and collaborative control method and system for hot galvanizing production line flue gas waste heat cascade recovery and zinc dust capture
By simultaneously coupling the waste heat recovery and zinc dust collection of flue gas on the hot-dip galvanizing production line, and monitoring and dynamically adjusting the status in real time, the coupling interference problem between waste heat recovery and zinc dust collection is solved, achieving optimal synergy between system stability and energy efficiency, and improving energy utilization and environmental protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHEJIANG HANGFENG TITA CO LTD
- Filing Date
- 2026-04-20
- Publication Date
- 2026-07-21
AI Technical Summary
In existing technologies, waste heat recovery from flue gas and zinc dust collection in hot-dip galvanizing production lines are coupled and interfered with each other, resulting in insufficient system stability. The waste heat recovery efficiency and zinc dust collection effect cannot achieve optimal synergy, and the energy efficiency monitoring lacks real-time collaborative sensing capabilities, leading to energy waste and environmental pollution.
By synchronously coupling the waste heat recovery of flue gas and zinc dust collection, real-time status information is collected, and online monitoring is used to coordinate the monitoring of parameters across the entire chain. Interference is identified and the operating status is dynamically adjusted. The adjustment is optimized to achieve multi-objective coordinated balance. A deep coupling structure is used to avoid interference and continuous feedback is used for iterative optimization.
The system has achieved long-term stable operation, improved the waste heat recovery and utilization rate, reduced energy waste and zinc dust emissions, and met the requirements of green and low-carbon industrial development.
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Figure CN122429632A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of hot-dip galvanizing production technology, and in particular to an energy efficiency monitoring and synergistic control method and system for the cascade recovery of waste heat from flue gas and the capture of zinc dust in hot-dip galvanizing production lines. Background Technology
[0002] Hot-dip galvanizing is one of the core processes for corrosion protection of steel products. During its production, a large amount of high-temperature flue gas is generated. The flue gas not only contains a large amount of waste heat that can be recovered and reused, but also contains zinc dust pollutants such as submicron-sized zinc fumes and zinc powder. If it is directly emitted, it will not only cause serious waste of energy, but also pollute the environment, which does not meet the current dual requirements of industrial energy conservation and carbon reduction and environmental protection.
[0003] However, existing technologies still have many shortcomings in practical engineering applications, resulting in the inability to achieve optimal synergy between waste heat recovery efficiency, zinc dust collection effect, and system energy efficiency. Specifically, these shortcomings are as follows: waste heat recovery and zinc dust collection are prone to mutual interference during coupled operation, leading to insufficient system stability. Existing waste heat recovery components and zinc dust collection devices mostly adopt simple series or parallel connection methods. Zinc dust in hot-dip galvanizing flue gas has the characteristics of high viscosity and easy caking, which makes it very easy to deposit on the heat exchange surface of waste heat recovery components, resulting in a rapid decline in heat exchange efficiency and increased system energy consumption. When increasing the flue gas velocity or starting the dust removal device to ensure the zinc dust collection effect, it will disrupt the temperature field stability of the waste heat recovery system, causing fluctuations in waste heat recovery efficiency. Secondly, energy efficiency monitoring is mostly single-point and offline detection, lacking real-time collaborative sensing capabilities. Current energy efficiency monitoring technologies mostly focus on the independent detection of single parameters such as temperature, pressure, flow rate, and zinc dust concentration. The monitoring points are relatively scattered, and some parameters still rely on offline sampling and analysis. It is impossible to quantify the energy efficiency loss of each link in real time, and it is also difficult to accurately capture the correlation between waste heat recovery efficiency, zinc dust collection effect and main process energy consumption. Based on this, an energy efficiency monitoring and collaborative control method and system for the cascade recovery of waste heat and zinc dust collection of flue gas in hot-dip galvanizing production lines is proposed to solve the above problems. Summary of the Invention
[0004] The purpose of this invention is to solve the problems in the background art, and to propose an energy efficiency monitoring and synergistic control method and system for the cascade recovery of waste heat and zinc dust collection of flue gas in hot-dip galvanizing production lines.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: An energy efficiency monitoring and synergistic control method for waste heat recovery and zinc dust capture in flue gas from hot-dip galvanizing production lines includes the following steps: Step 1: Start the flue gas treatment process of the hot-dip galvanizing production line, and simultaneously carry out the coupled operation of flue gas waste heat recovery and zinc dust collection, and collect various status information during the operation of both in real time; wherein, the status information includes the heat exchange status of the waste heat recovery component, the collection status of the zinc dust collection device, and the flue gas flow status. Step 2: Conduct coordinated monitoring of the operating parameters of the entire process chain of waste heat recovery, zinc dust collection, and hot-dip galvanizing, and realize the synchronous acquisition and transmission of parameters of each link; wherein, the operating parameters of the entire chain include parameters related to waste heat recovery, parameters related to zinc dust collection, and parameters related to energy consumption of the hot-dip galvanizing main process, and each parameter is acquired through online monitoring. Step 3: Based on the collected status information and monitoring parameters, identify the mutual interference between the waste heat recovery and zinc dust collection during coupled operation, and dynamically adjust the operating status of the two to maintain system stability; the dynamic adjustment includes adjusting the operating status of the waste heat recovery component, adjusting the cleaning timing of the zinc dust collection device, and adjusting the flue gas flow rate to eliminate the coupling interference between the two. Step 4: Quantify the energy efficiency loss of each link based on the monitoring parameters, and optimize and adjust the waste heat recovery load and zinc dust collection operation status in combination with the main hot-dip galvanizing process requirements; among them, the optimization and adjustment process needs to take into account the waste heat recovery effect, the zinc dust collection effect and the system energy consumption to achieve a multi-objective coordinated balance. Step 5: Continuously provide feedback on the adjustment effect, iteratively optimize operating parameters, and achieve optimal synergy between waste heat recovery, zinc dust capture, and system energy efficiency; An energy efficiency monitoring and collaborative control system for waste heat recovery and zinc dust collection in flue gas of hot-dip galvanizing production line includes a waste heat recovery module, a zinc dust collection module, an energy efficiency monitoring module, a collaborative control module, and a data transmission module. The waste heat recovery module is used to perform cascade waste heat recovery treatment on the flue gas generated in the hot-dip galvanizing production line. The zinc dust collection module is used to capture zinc dust pollutants in flue gas, thereby reducing pollutant emissions. The energy efficiency monitoring module is used to monitor the operating parameters of the waste heat recovery module, zinc dust collection module and the hot-dip galvanizing main process in real time, and quantify the energy efficiency loss of each link. The energy efficiency monitoring module includes multiple distributed monitoring units, which correspond to each link of waste heat recovery, zinc dust collection and hot-dip galvanizing main process, respectively, to realize synchronous monitoring of parameters throughout the entire process. The data transmission module is used to transmit the monitoring data collected by the energy efficiency monitoring module to the collaborative control module; The collaborative control module is connected to the waste heat cascade recovery module, the zinc dust collection module, the energy efficiency monitoring module, and the data transmission module, respectively. It is used to dynamically adjust the operating status of each module according to the monitoring data to achieve collaborative optimization. The collaborative control module can receive the monitoring data transmitted by the data transmission module, dynamically adjust the heat exchange load of the waste heat cascade recovery module, and optimize the operating parameters of the zinc dust collection module according to the energy efficiency loss quantification results to ensure that the collection effect and system energy efficiency are optimally coordinated. The waste heat recovery module and the zinc dust collection module adopt a deeply coupled structure to avoid mutual interference during operation.
[0006] Compared with existing technologies, the advantages of this invention are: 1. This invention simultaneously performs cascaded waste heat recovery and zinc dust collection, coordinating their operation. It collects real-time data on the heat exchange status of the waste heat recovery components, the collection status of the zinc dust collection device, and the flue gas flow status. Based on the collected status information and monitoring parameters, it accurately identifies the mutual interference during the coupled operation of the two systems. It then dynamically adjusts the operating status of the waste heat recovery components, the cleaning timing of the zinc dust collection device, and the flue gas flow rate accordingly. This effectively avoids the heat exchange efficiency degradation caused by zinc dust deposition, while preventing the disruption of the waste heat recovery temperature field caused by cleaning and flue gas flow rate adjustment. This eliminates the coupling interference between the two systems, ensuring long-term stable operation, avoiding energy efficiency fluctuations, and improving the reliability and stability of the system.
[0007] 2. This invention achieves coordinated monitoring of operational parameters across the entire process of waste heat recovery, zinc dust collection, and hot-dip galvanizing by employing online monitoring to synchronously collect and transmit parameters from each stage. This covers parameters related to waste heat recovery, zinc dust collection, and energy consumption in the hot-dip galvanizing process, overcoming the limitations of single-point and offline monitoring and enabling coordinated perception of parameters across the entire process. Simultaneously, by quantifying energy efficiency losses at each stage based on monitoring parameters, it accurately captures the correlations between stages, solving the problems of existing monitoring technologies' inability to quantify energy efficiency losses in real time and insufficient data support. This provides reliable data support for subsequent dynamic adjustment and optimization control, ensuring the scientific validity and rationality of coordinated control commands.
[0008] 3. This invention optimizes and adjusts the waste heat recovery load and zinc dust collection operation status by combining the main process requirements of hot-dip galvanizing, taking into account the waste heat recovery effect, zinc dust collection effect and system energy consumption, and achieving a multi-objective synergistic balance. Then, through continuous feedback of the adjustment effect, the operating parameters are iteratively optimized and the adjustment deviation is constantly corrected, ultimately achieving the optimal synergy of waste heat recovery, zinc dust collection and system energy efficiency. Compared with the prior art, this invention not only effectively improves the recovery and utilization rate of flue gas waste heat and reduces energy waste, but also ensures the zinc dust collection effect, reduces pollutant emissions, and reduces the overall system energy consumption. It not only solves the core defects of the prior art, but also meets the requirements of green and low-carbon industrial development, and has significant practical value and promotion significance. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the method flow of the present invention; Figure 2 This is a block diagram of the overall system structure of the present invention. Detailed Implementation
[0010] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0011] Reference Figures 1-2 An energy efficiency monitoring and synergistic control method for waste heat recovery and zinc dust capture in flue gas from hot-dip galvanizing production lines includes the following steps: Step 1: Couple startup and status information acquisition: The flue gas treatment process of the hot-dip galvanizing production line is initiated, allowing the high-temperature flue gas generated by the hot-dip galvanizing production line to enter the preset treatment channel. Simultaneously, the waste heat recovery module and the zinc dust collection module are activated to achieve coupled operation of the two, ensuring that the flue gas completes zinc dust collection treatment while undergoing waste heat recovery, avoiding efficiency loss caused by independent operation of the two. During coupled operation, the heat exchange status of the waste heat recovery component, the collection status of the zinc dust collection device, and the flue gas flow status are collected in real time through preset acquisition units. Among them, the heat exchange status is used to reflect the operational effectiveness of the waste heat recovery component, the collection status is used to reflect the pollutant treatment effect of the zinc dust collection device, and the flue gas flow status is used to reflect the flow of flue gas in the treatment channel. The above status information is collected and temporarily stored in real time, providing basic data support for subsequent interference identification and dynamic adjustment. Step 2: Collaborative online monitoring of end-to-end operational parameters: Multiple distributed energy efficiency monitoring units are activated to collaboratively monitor the entire operational parameters of the waste heat recovery, zinc dust collection, and hot-dip galvanizing main process, enabling synchronous acquisition and transmission of parameters across all stages. These parameters include waste heat recovery, zinc dust collection, and hot-dip galvanizing main process energy consumption parameters. All parameters are acquired online, eliminating the need for offline sampling and analysis, thus ensuring real-time accuracy. During monitoring, parameters are collected synchronously and transmitted in real-time to the collaborative control module via a data transmission module. This collaborative sensing of waste heat recovery, zinc dust collection, and main process energy consumption parameters addresses the issues of scattered monitoring points and lack of coordination in existing technologies. Step 3: Coupling Interference Identification and Dynamic Adjustment The collaborative control module receives the status information collected in step one and the full-link operation parameters monitored in step two. Through preset identification logic, it analyzes and identifies the mutual interference generated during the coupled operation of waste heat recovery and zinc dust collection. For example, it identifies the deposition of zinc dust on the heat exchange surface of the waste heat recovery component and the impact of flue gas velocity changes on the waste heat recovery temperature field. For the identified coupling interference, the collaborative control module issues adjustment commands to dynamically adjust the operating status of the waste heat recovery component, the cleaning timing of the zinc dust collection device, and the flue gas velocity: when it detects that the heat exchange efficiency is reduced due to dust accumulation on the heat exchange surface, it reasonably adjusts the cleaning timing to avoid the cleaning process from causing a drastic impact on the waste heat recovery temperature field; when it detects that the flue gas velocity is abnormal and affects the collection effect or waste heat recovery efficiency, it adjusts the flue gas velocity to a reasonable range to eliminate the coupling interference between the two and maintain the overall stable operation of the system. Step 4: Quantification of Energy Efficiency Loss and Multi-Objective Optimization Adjustment: Based on the full-link operation parameters monitored in step two, the collaborative control module quantifies the energy efficiency loss of each link in the waste heat recovery, zinc dust collection, and hot-dip galvanizing main process through preset quantification logic, clarifying the energy waste in each link. Combined with the actual operation requirements of the hot-dip galvanizing main process, the module optimizes and adjusts the waste heat recovery load and zinc dust collection operation status. During the adjustment process, the module strictly considers the waste heat recovery effect, zinc dust collection effect, and overall system energy consumption, avoiding the pursuit of a single effect that leads to the deterioration of other indicators. This achieves a multi-objective collaborative balance among the three, improving the overall energy efficiency level of the system. Step 5: Feedback Iteration and Optimal Collaborative Implementation During system operation, the optimization and adjustment effects of step four are continuously fed back to the collaborative control module. Based on the feedback, the collaborative control module analyzes the rationality of the current operating parameters and iteratively optimizes operating parameters such as waste heat recovery load, zinc dust collection operation status, flue gas velocity, and dust removal timing, continuously correcting adjustment deviations. Through continuous feedback and iteration, the optimal synergy between waste heat recovery efficiency, zinc dust collection effect, and system energy efficiency is gradually achieved, ensuring long-term stable operation of the system and meeting the dual needs of industrial energy conservation and carbon reduction as well as environmental protection. An energy efficiency monitoring and collaborative control system for the cascade recovery of waste heat and zinc dust collection in flue gas from a hot-dip galvanizing production line, corresponding to the above-mentioned method implementation, includes a waste heat cascade recovery module, a zinc dust collection module, an energy efficiency monitoring module, a collaborative control module, and a data transmission module. The specific implementation structure and working process are as follows: Waste heat recovery module: It is arranged in the flow path of flue gas in the hot-dip galvanizing production line and is fixedly connected to the flue gas treatment channel. It is used to perform cascade waste heat recovery treatment on the high-temperature flue gas generated by the hot-dip galvanizing production line, and to utilize the waste heat in the flue gas in stages to provide heat support for hot-dip galvanizing production-related processes and improve energy utilization. Zinc dust collection module: It is arranged in a deeply coupled structure with the waste heat cascade recovery module and integrated in the flue gas treatment channel. It works in conjunction with the waste heat cascade recovery module to collect zinc dust pollutants in the flue gas, reduce the emission of zinc dust pollutants, and at the same time, the deep coupling structure avoids mutual interference between the two during operation, ensuring the stability of their respective operations. Energy efficiency monitoring module: It includes multiple distributed monitoring units, each corresponding to the waste heat recovery module, zinc dust collection module and key links of the hot-dip galvanizing main process. The units are fixedly arranged at key monitoring points in each link to realize synchronous monitoring of the operating parameters of the whole link. The module can quantify the energy efficiency loss of each link based on the monitored operating parameters, and provide data support for collaborative control. Data transmission module: Connected to the energy efficiency monitoring module and the collaborative control module respectively, using wired or wireless transmission methods, it is used to transmit the full-link operating parameters, energy efficiency loss quantification results and operating status information of each module collected by the energy efficiency monitoring module to the collaborative control module in real time, ensuring the real-time performance and reliability of data transmission; Collaborative control module: It is connected to the waste heat cascade recovery module, zinc dust collection module, energy efficiency monitoring module and data transmission module respectively. As the control core of the system, it can receive various monitoring data transmitted by the data transmission module, and dynamically adjust the operating status of each module according to the monitoring data to achieve collaborative optimization of each module. After the system starts up, the high-temperature flue gas generated by the hot-dip galvanizing production line enters the flue gas treatment channel. The waste heat recovery module and the zinc dust collection module start up simultaneously to achieve coupled operation. The distributed monitoring units of the energy efficiency monitoring module start up simultaneously to monitor the operating parameters of the entire chain in real time and quantify the energy efficiency loss of each link. The monitoring data and the energy efficiency loss quantification results are transmitted to the collaborative control module in real time through the data transmission module. After receiving the data, the collaborative control module analyzes and identifies the mutual interference between the waste heat cascade recovery module and the zinc dust collection module during coupled operation, issues adjustment commands to dynamically adjust the heat exchange load of the waste heat cascade recovery module, and optimizes the operating parameters of the zinc dust collection module based on the energy efficiency loss quantification results to ensure optimal synergy between zinc dust collection effect and system energy efficiency. During system operation, the collaborative control module continuously receives feedback information from each module, iteratively optimizes the operating parameters of each module, and effectively solves the technical defects in the existing technology through the collaborative cooperation of each module, achieving optimal synergy between waste heat recovery, zinc dust capture and system energy efficiency. It is suitable for flue gas treatment and energy-saving and carbon reduction scenarios in various hot-dip galvanizing production lines.
[0012] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A method for energy efficiency monitoring and coordinated control of waste heat recovery and zinc dust collection from flue gas in hot-dip galvanizing production lines, characterized in that, Includes the following steps: Step 1: Start the flue gas treatment process of the hot-dip galvanizing production line, and simultaneously carry out the coupled operation of flue gas waste heat recovery and zinc dust collection, and collect various status information of the two processes in real time; Step 2: Conduct coordinated monitoring of the operating parameters of the entire process chain of waste heat recovery, zinc dust collection and hot-dip galvanizing, and realize synchronous acquisition and transmission of parameters of each link; Step 3: Based on the collected status information and monitoring parameters, identify the mutual interference between the waste heat cascade recovery and zinc dust collection during coupled operation, and dynamically adjust the operating status of the two to maintain system stability; Step 4: Quantify the energy efficiency loss of each link based on the monitoring parameters, and optimize and adjust the waste heat recovery load and zinc dust collection operation status in combination with the main hot-dip galvanizing process requirements. Step 5: Continuously provide feedback on the adjustment effect, iteratively optimize operating parameters, and achieve optimal synergy between waste heat recovery, zinc dust capture, and system energy efficiency.
2. The energy efficiency monitoring and synergistic control method for waste heat recovery and zinc dust collection in hot-dip galvanizing production lines according to claim 1, characterized in that, In step one, the status information includes the heat exchange status of the waste heat recovery component, the collection status of the zinc dust collection device, and the flue gas flow status.
3. The energy efficiency monitoring and synergistic control method for waste heat recovery and zinc dust collection in hot-dip galvanizing production lines according to claim 1, characterized in that, In step two, the full-chain operation parameters include parameters related to waste heat recovery, parameters related to zinc dust collection, and parameters related to the energy consumption of the hot-dip galvanizing main process, and all parameters are obtained through online monitoring.
4. The energy efficiency monitoring and synergistic control method for waste heat recovery and zinc dust collection in hot-dip galvanizing production lines according to claim 1, characterized in that, In step three, dynamic adjustment includes adjusting the operating status of the waste heat recovery component, adjusting the cleaning timing of the zinc dust collection device, and adjusting the flue gas flow rate to eliminate the coupling interference between the two.
5. The energy efficiency monitoring and synergistic control method for waste heat recovery and zinc dust collection in hot-dip galvanizing production lines according to claim 1, characterized in that, In step four, the optimization and adjustment process needs to take into account the waste heat recovery effect, the zinc dust collection effect, and the system energy consumption to achieve a multi-objective coordinated balance.
6. An energy efficiency monitoring and coordinated control system for the cascade recovery of waste heat and zinc dust collection from flue gas in a hot-dip galvanizing production line, characterized in that, It includes a waste heat recovery module, a zinc dust collection module, an energy efficiency monitoring module, a collaborative control module, and a data transmission module; The waste heat recovery module is used to perform cascade waste heat recovery treatment on the flue gas generated in the hot-dip galvanizing production line. The zinc dust collection module is used to capture zinc dust pollutants in flue gas, thereby reducing pollutant emissions. The energy efficiency monitoring module is used to monitor the operating parameters of the waste heat recovery module, zinc dust collection module and the entire hot-dip galvanizing process in real time, and to quantify the energy efficiency loss of each link. The data transmission module is used to transmit the monitoring data collected by the energy efficiency monitoring module to the collaborative control module; The collaborative control module is connected to the waste heat cascade recovery module, zinc dust collection module, energy efficiency monitoring module, and data transmission module, respectively. It is used to dynamically adjust the operating status of each module according to the monitoring data to achieve collaborative optimization.
7. The energy efficiency monitoring and coordinated control system for waste heat recovery and zinc dust collection from flue gas in a hot-dip galvanizing production line according to claim 6, characterized in that, The waste heat recovery module and the zinc dust collection module adopt a deeply coupled structure to avoid mutual interference during their operation.
8. The energy efficiency monitoring and coordinated control system for waste heat recovery and zinc dust collection from flue gas in a hot-dip galvanizing production line according to claim 6, characterized in that, The energy efficiency monitoring module includes multiple distributed monitoring units, which correspond to each stage of the waste heat recovery, zinc dust collection and hot-dip galvanizing main process, respectively, to achieve synchronous monitoring of parameters across the entire process.
9. The energy efficiency monitoring and coordinated control system for waste heat recovery and zinc dust collection from flue gas in a hot-dip galvanizing production line according to claim 6, characterized in that, The collaborative control module can receive monitoring data transmitted by the data transmission module and dynamically adjust the heat exchange load of the waste heat cascade recovery module.
10. The energy efficiency monitoring and coordinated control system for waste heat recovery and zinc dust collection from flue gas in a hot-dip galvanizing production line according to claim 6, characterized in that, The collaborative control module optimizes and adjusts the operating parameters of the zinc dust collection module based on the quantification results of energy efficiency loss, ensuring optimal synergy between collection effect and system energy efficiency.