Antimony smelting flue gas waste heat recovery and production linkage control method

Abstract

The application provides a Sb smelting flue gas waste heat recovery and production linkage control method, and belongs to the linkage control technical field, which calculates the waste heat production capacity and the equipment recovery capacity in real time, dynamically matches the production load and the heat exchange working condition, completely eliminates the waste heat supply and demand mismatch problem, maximizes the production load and the heat exchange efficiency during the high waste heat output period, fully captures the high temperature and high flow flue gas waste heat, accurately adjusts the equipment operation load during the low waste heat period, avoids the invalid energy consumption and waste heat waste, and improves the comprehensive utilization rate of the flue gas waste heat of Sb smelting, especially the medium and low temperature waste heat recovery utilization rate, completely breaks the technical defect that the low temperature waste heat cannot be efficiently recovered in the industry, realizes the step-by-step, efficient and accurate recovery and utilization of the flue gas waste heat, and realizes the dynamic optimization and fine regulation and control of the production scheduling by taking the real-time waste heat output capacity as an important constraint condition and by accurately quantifying the load matching threshold and the adjustment range.

Description

Technical Field

[0001] This invention belongs to the field of linkage control technology, specifically relating to a linkage control method for waste heat recovery and production scheduling of antimony smelting flue gas. Background Technology

[0002] Antimony smelting mainly adopts key processes such as oxygen-enriched volatilization roasting and reduction smelting. The entire production process continuously generates a large amount of high-temperature, high-dust, and highly corrosive industrial flue gas. The high temperature of the flue gas makes it the main waste heat carrier of the smelting production line. Flue gas waste heat accounts for a high proportion of the total waste heat resources of the antimony smelting system. However, the current mainstream waste heat recovery technology in the industry causes a large amount of medium and low temperature waste heat to be directly discharged into the air with the tail gas. The waste heat recovery system and the smelting production scheduling system operate independently without any linkage or coupling mechanism.

[0003] Specifically, existing technologies for waste heat recovery from antimony smelting flue gas mostly employ fixed-condition heat exchange and constant-parameter steam generation modes using waste heat boilers. Equipment operating parameters, heat exchange intensity, and steam generation load are all set constant according to rated production conditions, which cannot match the dynamic fluctuations in smelting production. Real-time fluctuations in antimony ore grade, feed rate, oxygen concentration, and roasting temperature directly lead to continuous changes in flue gas temperature, flow rate, dust content, and waste heat grade. Fixed-mode waste heat recovery systems are prone to insufficient recovery of high-grade waste heat, excessive heat exchange of low-grade waste heat, and equipment ash accumulation. Problems such as accelerated corrosion and excessive heat exchange losses exist. At the same time, smelting production plans are mostly based on market orders, equipment capacity, and manual experience, completely ignoring the dynamic characteristics of flue gas waste heat output. This leads to a mismatch between production scheduling and waste heat output. Specifically, during periods of high waste heat output, the production load is too low, resulting in a large amount of waste heat being idle and wasted. During periods of low waste heat output, the production is at full capacity, causing the waste heat recovery system to be overloaded and the heat exchange efficiency to drop sharply. This not only further reduces energy utilization but also leads to pressure fluctuations in the waste heat boiler and frequent start-ups and shutdowns of heat exchange equipment, significantly increasing equipment failure rates and maintenance costs.

[0004] In summary, existing technologies suffer from technical defects such as process fragmentation, poor dynamic matching, low waste heat utilization, insufficient production scheduling rationality, and low control precision. There is an urgent need for a flue gas waste heat recovery and production scheduling linkage control method specifically for antimony smelting conditions to solve the defects of existing technologies in the industry. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this section, the abstract and title of the invention. Such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] In view of the aforementioned existing problems, the present invention is proposed.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: This invention provides a method for the coordinated control of waste heat recovery and production scheduling in antimony smelting flue gas, comprising: Real-time synchronous acquisition of all operating parameters for waste heat recovery and production scheduling in antimony smelting flue gas; After real-time synchronous acquisition of all operating parameters, the PLC calculates key waste heat indicators in real time. The optimal production load and adjustment amount are dynamically calculated based on key waste heat indicators calculated in real time. Dynamic optimization of production scheduling is performed based on the dynamic adjustment range of production scheduling. After dynamic optimization of production scheduling, adaptive reverse adjustment of waste heat recovery conditions is carried out.

[0008] Furthermore, the method for real-time synchronous acquisition of parameters for waste heat recovery and production scheduling of antimony smelting flue gas under all operating conditions specifically includes: The system uses various preset sensors to collect basic parameters for waste heat recovery and production scheduling of antimony smelting flue gas in real time at a set sampling frequency, and then transmits these basic parameters to the PLC in real time.

[0009] Furthermore, the basic parameters specifically include: Instantaneous volumetric flow rate of flue gas It uses an ultrasonic flow meter installed on the main flue gas duct to collect and transmit data to the PLC; Instantaneous average temperature of flue gas It is the arithmetic mean of the temperature values ​​collected in real time by temperature sensor 1, temperature sensor 2 and temperature sensor 3 and sent to the PLC. Temperature sensor 1, temperature sensor 2 and temperature sensor 3 are respectively arranged at the boiler inlet, heat exchanger and boiler outlet of the waste heat boiler. Standard constant pressure specific heat capacity of flue gas It uses a flue gas analyzer to collect the volume percentage of SO2, O2, N2 and dust in the flue gas in real time and transmits it to the PLC. The PLC then uses this data to calculate the standard constant pressure volumetric specific heat capacity of the flue gas in real time. The flue gas analyzer is installed in the main flue gas pipeline. Instantaneous feed rate of the production line It is an electronic belt scale installed on the feed belt of antimony ore raw material that collects the amount of antimony ore conveyed on the feed belt in real time and transmits it to the PLC. Effective smelting calorific value of raw materials The calorific value analyzer collects the calorific value of the antimony ore raw material in real time and transmits it to the PLC. The calorific value analyzer is set between the end of the feed belt of the antimony ore raw material and the front end of the feed inlet of the roasting furnace. Instantaneous heat exchange temperature difference of waste heat boiler It uses temperature sensors four and five to collect the flue gas inlet temperature and heat pipe outlet temperature of the heat exchanger in real time and transmits them to the PLC. The PLC uses the difference between the flue gas inlet temperature and the heat pipe outlet temperature as the instantaneous heat exchange temperature difference of the waste heat boiler. Temperature sensor four and temperature sensor five are respectively installed at the flue gas inlet of the heat exchanger and the outlet of the heat pipe; Ambient reference temperature of flue gas The temperature sensor, which is installed in the workshop where antimony smelting and flue gas waste heat recovery are located, collects the temperature value in real time and transmits it to the PLC. Instantaneous medium flow rate of waste heat boiler It is an electromagnetic flow meter that collects the instantaneous volumetric flow rate of the heat transfer medium in real time and transmits it to the PLC. The electromagnetic flow meter is installed on the pipeline with a flow valve that connects the heat pipe and the working medium storage tank.

[0010] Furthermore, the PLC stores the rated heat exchange area of ​​the waste heat boiler. ; The PLC also stores the density of the heat transfer medium. Rated design load of the production line The cross-sectional area of ​​the heat pipes in the heat exchanger .

[0011] Furthermore, the method for real-time calculation of key waste heat indicators using PLC specifically includes: The PLC uses formulas (1) and (2) to calculate the instantaneous total waste heat capacity of the flue gas in real time. and the instantaneous effective recovery capacity of waste heat boilers .

[0012] Furthermore, formula (1) is shown below: ; In formula (1), The instantaneous total waste heat capacity of the flue gas; This refers to the instantaneous volumetric flow rate of the flue gas. The standard isobaric volumetric specific heat capacity of flue gas; The instantaneous average temperature of the flue gas; The ambient reference temperature of the flue gas;

[0013] Formula (2) is shown below: ; In formula (2), This refers to the instantaneous and effective recovery capacity of waste heat boilers; This refers to the rated heat exchange area of ​​the waste heat boiler. This refers to the instantaneous heat exchange temperature difference in the waste heat boiler. This refers to the instantaneous medium flow rate of the waste heat boiler. The density of the heat transfer medium; The specific heat capacity at constant pressure of the heat transfer medium; This refers to the cross-sectional area of ​​the heat pipes in the heat exchanger.

[0014] Furthermore, a method for dynamically calculating optimal production load and adjustment based on real-time calculated key waste heat indicators specifically includes: Based on the real-time calculation of key waste heat indicators, formula (3) is used to calculate the waste heat matching threshold of the production load corresponding to the current waste heat operating condition. Then, the dynamic adjustment range of production scheduling is calculated using formula (4). .

[0015] Furthermore, formula (3) is shown below: ; In formula (3), The threshold for matching waste heat to production load; This refers to the instantaneous and effective recovery capacity of waste heat boilers; The instantaneous total waste heat capacity of the flue gas; This is the rated design load of the production line; Formula (4) is shown below: ; In formula (4), The dynamic adjustment range for production scheduling; The threshold for matching waste heat to production load; This refers to the instantaneous feed rate of the production line.

[0016] Furthermore, the method for dynamically optimizing production scheduling based on the dynamic adjustment range of production scheduling specifically includes: When the instantaneous feed rate of the production line Waste heat exceeding the production load matching threshold At that time, the PLC automatically reduces the instantaneous feed rate of the production line. Lowered to the waste heat matching threshold of production load That is, the PLC's adaptive PID controller will dynamically adjust the production scheduling range. As a downward adjustment, the adaptive PID controller automatically calculates a control command based on this adjustment and converts it into a standard industrial signal to send to the frequency converter. Upon receiving this industrial signal, the frequency converter adjusts its output frequency accordingly to control the motor's rotation speed and thus the instantaneous feed rate of the production line. Lowered to the waste heat matching threshold of production load When the instantaneous feed rate of the production line Waste heat less than the production load matching threshold At that time, the control system PLC automatically increases the instantaneous feed rate of the production line. Adjusted to the waste heat matching threshold of production load That is, the PLC's adaptive PID controller will dynamically adjust the production scheduling range. As the adjustment amount, the adaptive PID controller automatically calculates a control command based on this adjustment amount and converts it into a standard industrial signal to send to the frequency converter. After receiving the industrial signal, the frequency converter adjusts its output frequency accordingly to control the motor's rotation speed and increase the instantaneous feed rate of the production line. Adjusted to the waste heat matching threshold of production load .

[0017] Furthermore, the method for adaptive reverse adjustment of waste heat recovery operation includes: After completing the dynamic optimization of production scheduling, the control system calls formula (5) to calculate the dynamic adjustment range of the waste heat recovery medium flow rate. The instantaneous flow rate of the waste heat boiler is dynamically adjusted according to the dynamic adjustment range of the waste heat recovery medium flow rate, which includes: when > At that time, the PLC controls the flow valve to increase the instantaneous medium flow rate of the waste heat boiler to [a certain value]. ;when < At that time, the PLC controls the flow valve to reduce the instantaneous medium flow rate of the waste heat boiler to [a certain value]. ; Formula (5) is shown below: ; In formula (5), The dynamic adjustment range of the waste heat recovery medium flow rate; The instantaneous total waste heat capacity of the flue gas; This refers to the instantaneous and effective recovery capacity of waste heat boilers; This refers to the instantaneous medium flow rate of the waste heat boiler.

[0018] The beneficial effects of the present invention are as follows, compared with the prior art: This invention, through corresponding formulas, real-time acquisition of all parameters, and bidirectional linkage control, fundamentally solves the technical problems of existing antimony smelting processes, such as the disconnect between waste heat recovery and production scheduling, poor dynamic matching, low waste heat utilization rate, high energy consumption, and poor equipment stability. Compared with existing technologies, it has multi-dimensional technical, economic, and environmental benefits, as detailed below: This invention, by real-time calculation of waste heat production capacity and equipment recovery capacity, dynamically matches production load and heat exchange conditions, completely eliminating the problem of waste heat supply and demand mismatch. During periods of high waste heat output, it maximizes production load and heat exchange efficiency, fully capturing waste heat from high-temperature and high-flow-rate flue gas. During periods of low waste heat output, it accurately reduces equipment operating load, avoiding ineffective energy consumption and waste heat. This invention can improve the comprehensive utilization rate of waste heat from antimony smelting flue gas, with a particularly significant improvement in the recovery and utilization rate of medium- and low-temperature waste heat. It completely overcomes the technical deficiency in the industry of inefficiently recovering low-temperature waste heat, achieving tiered, efficient, and accurate recovery and utilization of flue gas waste heat. This invention prioritizes real-time waste heat production capacity. By accurately quantifying load matching thresholds and adjustment ranges, this invention achieves dynamic optimization and refined control of production scheduling, automatically identifying optimal production conditions. It maximizes production capacity when waste heat resources are abundant and appropriately optimizes loads and avoids inefficient production when waste heat resources are scarce. This completely solves the mismatch problem of high waste heat and low capacity versus low waste heat and high capacity. After applying this invention, the effective capacity utilization rate of the production line is improved, the fluctuation range of production load is reduced, and production conditions are more stable. It eliminates unreasonable production states such as overload and low-load idling, significantly improving the scientific and rational nature of production scheduling. This invention utilizes bidirectional linkage control. This invention maximizes the recovery of waste heat from flue gas and reuses it in production processes, replacing traditional consumption of purchased steam and electricity. It also significantly reduces the ineffective energy consumption of heat exchange equipment and production equipment. After applying this technology, the overall energy consumption per unit product in antimony smelting can be reduced, and the overall energy consumption also decreases. The ineffective energy consumption of the waste heat recovery system is also reduced, avoiding additional energy consumption caused by frequent equipment start-ups and overload operation. Simultaneously, stable production conditions significantly reduce raw material loss and defect rates, further reducing overall production costs and creating significant economic benefits for the enterprise. This invention, through adaptive operating condition adjustment, ensures that the waste heat recovery equipment and production equipment always operate at an optimal matching level. Furthermore, the heat exchange temperature difference, medium flow rate, and production load are smoothly regulated, with no sudden changes in operating conditions or overload idling, significantly reducing equipment stress loss, corrosion rate, and the probability of ash accumulation and blockage. After applying this technology, the average fault-free operation time of the waste heat recovery equipment is increased, the frequency of equipment operation and maintenance and maintenance costs are reduced, and the service life of the equipment is significantly extended. It effectively solves the defects of severe equipment wear and high operation and maintenance costs caused by the complex flue gas conditions in antimony smelting. This invention achieves accurate reduction of carbon emissions by improving the waste heat recovery utilization rate, reducing fossil energy consumption, and reducing the overall energy consumption of production, reducing thermal pollution caused by flue gas waste heat discharge, and reducing the intensity of pollutant emissions from the smelting process.This invention's complete technical solution requires no modification to existing smelting equipment and waste heat recovery equipment. The upgrade can be implemented simply by adding high-precision sensing devices and a linkage control algorithm. The upgrade is low-cost, has a short construction period, and is compatible with all mainstream antimony smelting production lines. All corresponding formulas are applicable to antimony smelting enterprises with different raw material grades, production scales, and operating conditions. It boasts strong versatility, stability, and reliability, possessing high value for industry-wide application. Simultaneously, the automated control mode significantly reduces reliance on manual operation, minimizes human error, and enhances the intelligence and digital management level of the production line, driving the transformation and upgrading of the antimony smelting industry from traditional experience-based production to accurate, energy-saving, and intelligent green production. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is an overall flowchart of the antimony smelting flue gas waste heat recovery and production scheduling linkage control method described in this invention. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort should fall within the scope of protection of this invention.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0023] According to an embodiment of the present invention, in combination Figure 1 The flowchart shown illustrates a method for linking waste heat recovery and production scheduling in antimony smelting flue gas, as described in this invention. The method includes: This invention is based on the dynamic physical characteristics of waste heat generation from antimony smelting flue gas. It uses high-precision sensing equipment to collect basic operating parameters of the entire smelting production process in real time. Relying on corresponding formulas, it accurately quantifies four key indicators: instantaneous waste heat capacity, effectively recoverable waste heat, production load matching threshold, and optimal production scheduling adjustment range. This breaks down the process barriers between waste heat recovery and production scheduling. Using the real-time waste heat generation capacity of the flue gas as a constraint, it dynamically corrects the feed load, shift scheduling, and equipment operating parameters of the smelting production line. Simultaneously, it adaptively adjusts the heat exchange intensity, steam generation load, and flue gas treatment volume of the waste heat recovery system based on the real-time production load. This achieves dynamic matching, closed-loop linkage, and optimal coupling among waste heat generation, production scheduling, and waste heat recovery. The entire technical system is built entirely based on measured parameters, matching the fluctuations of the entire antimony smelting production process. The specific method of this invention is as follows: S1. Real-time synchronous acquisition of all operating parameters for waste heat recovery and production scheduling in antimony smelting flue gas. Note that the following points should be noted in this step: In a preferred embodiment, the method for real-time synchronous acquisition of parameters for waste heat recovery and production scheduling of antimony smelting flue gas under all operating conditions specifically includes: By using various preset industrial sensors, the basic parameters for waste heat recovery and production scheduling of antimony smelting flue gas are collected in real time at a set sampling frequency, and the basic parameters are transmitted to the PLC in real time to complete the initial input of the basic parameters.

[0024] For example, the sampling frequency can be set to 10Hz.

[0025] It should be noted that the PLC is connected to various preset industrial sensors. Antimony smelting flue gas waste heat recovery and production scheduling includes antimony smelting, flue gas waste heat recovery, and production scheduling. Antimony smelting involves smelting antimony ore using a roasting furnace. The roasting furnace is connected to the boiler inlet of the waste heat boiler via the main flue gas pipeline. Flue gas waste heat recovery involves transferring the high-temperature flue gas generated during the smelting process in the roasting furnace to the waste heat boiler via the main flue gas pipeline for waste heat recovery. Production scheduling refers to the planning of antimony ore smelting production, such as the feed rate of the production line. The waste heat boiler includes a boiler inlet, a heat exchanger, and a boiler outlet. The heat exchanger includes a flue gas inlet, heat pipes, and a flue gas outlet. The flue gas inlet is connected to the boiler inlet of the waste heat boiler, and the flue gas outlet is also connected to both the flue gas inlet and the boiler outlet. The inlet of the heat pipe is connected to a working fluid storage tank via a pipeline equipped with a flow valve. The working fluid storage tank stores... The heat transfer medium can be water or heat transfer oil. The flow valve is connected to the PLC. The feed belt for antimony ore consists of a belt body with the two ends wound around the drive pulley and the driven pulley respectively. One end of the drive pulley is connected to the output end of the motor. The motor is connected to the frequency converter, which is connected to the PLC. The discharge end of the feed belt for antimony ore is usually installed above the feed inlet of the roasting furnace. The PLC controls the frequency converter to make the motor rotate and drive the feed belt for antimony ore to feed the antimony ore into the feed inlet of the roasting furnace for smelting. The high-temperature flue gas generated during the smelting process is transferred to the waste heat boiler through the main flue gas pipeline. The high-temperature flue gas enters the heat exchanger through the flue gas inlet and exchanges heat with the heat transfer medium in the heat pipe. Then it is discharged from the flue gas outlet. During the heat exchange, the PLC can adjust the flow rate of the heat transfer medium by adjusting the flow valve. The PLC contains an adaptive PID controller. The heat pipe can be a single heat pipe.

[0026] Furthermore, the PLC can transmit basic parameters to the connected display screen in real time, thereby achieving real-time monitoring.

[0027] In a preferred embodiment, the basic parameters specifically include: Instantaneous volumetric flow rate of flue gas It uses an ultrasonic flow meter installed on the main flue gas pipeline to collect and transmit the data to the PLC, thereby collecting the instantaneous volumetric flow rate of the smelting flue gas in real time. Instantaneous average temperature of flue gas It is the arithmetic mean of the temperature values ​​collected in real time by temperature sensor 1, temperature sensor 2 and temperature sensor 3 and sent to the PLC. Temperature sensor 1, temperature sensor 2 and temperature sensor 3 are respectively arranged at the boiler inlet, heat exchanger and boiler outlet of the waste heat boiler. The arithmetic mean matches the full temperature range of the flue gas in antimony smelting. Standard constant pressure specific heat capacity of flue gas It uses a flue gas analyzer to collect the volume percentage of SO2, O2, N2 and dust in the flue gas in real time and transmits it to the PLC. The PLC then uses this data to calculate the standard constant pressure volumetric specific heat capacity of the flue gas in real time. The flue gas analyzer is installed in the main flue gas pipeline. Instantaneous feed rate of the production line It is an electronic belt scale installed on the feed belt of antimony ore raw material that collects the amount of antimony ore raw material conveyed on the feed belt in real time and transmits it to the PLC, which accurately reflects the real-time production load of the production line. Effective smelting calorific value of raw materials The calorific value analyzer collects the calorific value of the antimony ore raw material entering the furnace in real time and transmits it to the PLC. The calorific value analyzer is set between the end of the feed belt of the antimony ore raw material (that is, the discharge end) and the front end of the feed inlet of the roasting furnace. The calorific value of the antimony ore raw material corresponds to the effective heat release per unit mass during the roasting and reduction process of the raw material, and is directly related to the basic capacity of flue gas waste heat production. Instantaneous heat exchange temperature difference of waste heat boiler It uses temperature sensors four and five to collect the flue gas inlet temperature and the heat pipe outlet temperature (which is the outlet of the heat transfer medium in the heat exchanger) in real time and transmits the data to the PLC. The PLC uses the difference between the flue gas inlet temperature and the heat pipe outlet temperature as the instantaneous heat exchange temperature difference of the waste heat boiler. Temperature sensor four and temperature sensor five are respectively installed at the flue gas inlet and the heat pipe outlet of the heat exchanger, and they directly reflect the instantaneous heat exchange power of the heat exchanger. Ambient reference temperature of flue gas It consists of six temperature sensors installed in the workshops where antimony smelting and flue gas waste heat recovery are located. These sensors collect temperature values ​​in real time and transmit them to the PLC. The ambient reference temperature of the flue gas is also included. As a reference temperature parameter for the effective work done by waste heat; Instantaneous medium flow rate of waste heat boiler The electromagnetic flowmeter collects the instantaneous volumetric flow rate of the heat transfer medium in real time and transmits it to the PLC. The electromagnetic flowmeter is installed on the pipeline with a flow valve connecting the heat pipe and the working medium storage tank. The instantaneous medium flow rate of the waste heat boiler... It reflects the heat exchange and transport capacity of the heat transfer medium used for waste heat recovery.

[0028] In a preferred embodiment, the PLC stores the rated heat exchange area of ​​the waste heat boiler. The effective heat exchange area indicated on the nameplate, accompanying technical documents, or product certificate of the waste heat boiler can be used as the rated heat exchange area of ​​the waste heat boiler. ; The PLC also stores the density of the heat transfer medium. Rated design load of the production line The cross-sectional area of ​​the heat pipes in the heat exchanger The rated design load of the production line The amount of antimony ore feed material conveyed on the feed belt during the preset full-load production of an antimony smelting production line represents the full-load production capacity of the production line.

[0029] It should be noted that the industrial sensors include ultrasonic flow meters, temperature sensor 1, temperature sensor 2, temperature sensor 3, flue gas analyzers, calorific value analyzers, electronic belt scales, temperature sensor 4, temperature sensor 5, temperature sensor 6, and electromagnetic flow meters; the sampling start time and sampling frequency of ultrasonic flow meters, temperature sensor 1, temperature sensor 2, temperature sensor 3, flue gas analyzers, calorific value analyzers, electronic belt scales, temperature sensor 4, temperature sensor 5, temperature sensor 6, and electromagnetic flow meters are all the same.

[0030] Furthermore, a method is used whereby the volume percentages of SO2, O2, N2, and dust in the flue gas are collected in real time by a flue gas analyzer and transmitted to a PLC. The PLC then uses this data to calculate the standard constant-pressure volumetric specific heat capacity of the flue gas in real time. This method includes: Calculation formula The standard isobaric volumetric specific heat capacity of the flue gas is obtained ,in For the first The volume percentage of each component gas; the types of component gases include SO2, O2, N2, and dust in the flue gas. For the first under actual conditions The isobaric volumetric specific heat capacity of the component gases, in practice, is the temperature of the flue gas at its instantaneous average temperature. Furthermore, the actual pressure is obtained by a pressure transmitter installed on the main flue gas pipeline and transmitted to the PLC connected to it. The starting time and sampling frequency of the pressure transmitter and the basic parameters are the same.

[0031] S2. After real-time synchronous acquisition of all operating parameters, the PLC calculates key waste heat indicators in real time. It should be noted that the following points apply to this step: In a preferred embodiment, the method for real-time calculation of key waste heat indicators by PLC specifically includes: The PLC uses formulas (1) and (2) to calculate the instantaneous total waste heat capacity of the flue gas in real time. and the instantaneous effective recovery capacity of waste heat boilers By accurately grasping the upper limit of waste heat output and equipment recovery under the current production conditions, basic data on energy supply and demand can be constructed.

[0032] It should be noted that the instantaneous total waste heat capacity of the flue gas and the instantaneous effective recovery capacity of waste heat boilers This forms the key indicator of waste heat.

[0033] In a preferred embodiment, formula (1) is as follows: ; In formula (1), The instantaneous total waste heat capacity of the flue gas; This refers to the instantaneous volumetric flow rate of the flue gas. The standard isobaric volumetric specific heat capacity of flue gas; The instantaneous average temperature of the flue gas; The ambient reference temperature of the flue gas; It should be noted that Formula (1) is based on the basic principle of sensible heat transfer in thermodynamics, abandoning the fixed calorific value estimation model used in existing technologies. The key work capacity of flue gas waste heat is the sensible heat difference of flue gas relative to the environmental benchmark. The waste heat energy per unit volume of flue gas is determined by the specific heat capacity and temperature difference. The total waste heat production capacity is the product of the waste heat energy per unit volume and the instantaneous volumetric flow rate of flue gas. Formula (1) accurately conforms to the physical nature of waste heat production from flue gas in antimony smelting. It only calculates the effective usable sensible heat production capacity of flue gas, which fully matches the dynamic fluctuations in flue gas temperature and flow rate in antimony smelting. There is no estimation error problem as in existing general formulas.

[0034] Furthermore, Formula (1) differs from the existing fixed waste heat calculation formula in the smelting industry. It is specifically matched to the characteristics of flue gas with high dust content and stable composition in antimony smelting, and the calculation accuracy has been improved. The result of Formula (1) is completely determined by the actual working conditions, and its objectivity and versatility are extremely strong.

[0035] Formula (2) is shown below: ; In formula (2), This refers to the instantaneous and effective recovery capacity of waste heat boilers; This refers to the rated heat exchange area of ​​the waste heat boiler. This refers to the instantaneous heat exchange temperature difference in the waste heat boiler. This refers to the instantaneous medium flow rate of the waste heat boiler. The density of the heat transfer medium; The specific heat capacity at constant pressure of the heat transfer medium; This refers to the cross-sectional area of ​​the heat pipes in the heat exchanger.

[0036] It should be noted that the isobaric specific heat capacity of the heat transfer medium is the isobaric specific heat capacity of the heat transfer medium under corresponding conditions. The corresponding conditions are the actual pressure and average temperature of the heat transfer medium. The actual pressure of the heat transfer medium is the pressure value collected by the pressure transmitter installed on the pipeline equipped with the flow valve and transmitted to the PLC connected to it. The average temperature of the heat transfer medium is the arithmetic mean of the temperature values ​​collected in real time by temperature sensor seven and temperature sensor five and sent to the PLC connected to them. Temperature sensor seven and temperature sensor five are respectively installed at the inlet and outlet of the heat pipe to collect the inlet temperature and outlet temperature in real time. The sampling start time and sampling frequency of the pressure transmitter, temperature sensor seven and temperature sensor five installed on the pipeline equipped with the flow valve are the same.

[0037] Furthermore, formula (2) is constructed based on the thermodynamic principle of convective heat transfer and the coupling characteristics of the heat exchanger structure, accurately quantifying the maximum effective waste heat recovery limit of the waste heat boiler under the current operating conditions. The effective recovery capacity of the heat exchanger is jointly determined by the structural characteristics of the heat exchanger, the dynamic temperature difference of heat transfer, the medium transport flow rate, and the thermal properties of the medium, among which the area-to-section ratio is... As an important structural feature parameter of the heat exchanger, it represents the matching relationship between the overall heat exchange area of ​​the heat exchanger and the actual flow section of the medium. It can accurately correct the operating condition deviation caused by simply using the total heat exchange area for modeling, and truly reflect the constraint effect of the heat exchanger structure on the convective heat transfer efficiency. The instantaneous heat exchange temperature difference of the waste heat boiler is the key driving force for heat exchange, the medium flow rate is the heat energy transport carrier, and the density and specific heat capacity of the medium are the inherent thermal properties of the medium. The calculation result is the maximum waste heat energy that can be stably recovered per unit time, which accurately reflects the upper limit of the real-time operating load of the equipment. Formula (2) truly restores the working characteristics of the medium flow heat exchange of the waste heat boiler, solves the problem of large calculation deviation and poor model matching caused by only using the total heat exchange area for modeling and ignoring the actual flow conditions of the medium in the existing technology, and greatly improves the modeling accuracy and operating condition matching.

[0038] Furthermore, formula (2) breaks through the limitation of the existing technology that only calculates waste heat based on flue gas parameters in a single dimension. It combines the two-way calculation of equipment heat exchange capacity and medium transport characteristics, which is in line with the actual industrial heat exchange scenario. It can output the limit recovery load of the equipment in real time, providing accurate waste heat equipment constraints for production scheduling and avoiding waste heat recovery overload or idleness problems. It matches the dynamic fluctuations of the flow rate and temperature difference of the heat transfer medium, and can accurately match the production mode with changing working conditions.

[0039] S3. Dynamically calculate the optimal production load and adjustment amount based on real-time calculated key waste heat indicators. Note that the following points should be noted in this step: In a preferred embodiment, the method for dynamically calculating the optimal production load and adjustment amount based on real-time calculated key waste heat indicators specifically includes: Based on the key waste heat indicators calculated in real time by S2, formula (3) is used to calculate the waste heat matching threshold of the current waste heat condition corresponding to the optimal production load. Then, the dynamic adjustment range of production scheduling as the adjustment quantity is calculated using formula (4). This is to clarify the optimal adjustment direction and accurate adjustment value of the current production load.

[0040] In a preferred embodiment, formula (3) is as follows: ; In formula (3), The threshold for matching waste heat to production load; This refers to the instantaneous and effective recovery capacity of waste heat boilers; The instantaneous total waste heat capacity of the flue gas; For the rated design load of the production line, formula (3) takes the matching load under the waste heat condition. The minimum of the rated design load and the production line's rated load is used to ensure that the controlled load matches the current waste heat recovery capacity without exceeding the equipment hardware limit of the production line. It should be noted that formula (3) is the key coupling formula for the linkage between waste heat and production scheduling. It constructs a dynamic constraint matching relationship between waste heat recovery capacity, waste heat production capacity and production load. Based on the principle of energy supply and demand balance, the theoretical production load that can be matched under the current waste heat conditions is obtained by converting the ratio of the instantaneous effective recovery capacity of the waste heat boiler to the instantaneous total waste heat production capacity. At the same time, a minimum constraint is introduced, based on the rated design load of the production line. As a hardware upper limit protection, when the theoretical load matched by the waste heat working condition is less than the rated load, the waste heat matching load is used as the control benchmark to avoid mismatch between waste heat supply and demand and energy waste; when the waste heat is extremely abundant and the theoretical matching load exceeds the rated capacity of the equipment, the rated load is forcibly locked to prevent the production line from operating under overload and the equipment from failing due to overload; at the same time, thermal working condition constraints and equipment safety constraints are taken into account, and the working condition matching and industrial safety are greatly improved.

[0041] Furthermore, it pioneered a dynamic matching model for waste heat and load with equipment upper limit protection, balancing thermal optimization and equipment safety, and matching all operating conditions, especially those with extreme surplus waste heat. It relies entirely on the laws of energy balance and the inherent parameters of the equipment for calculation, resulting in accurate, reliable, and highly objective results. It completely solves the problem of artificially high theoretical loads under high waste heat conditions, maximizing the utilization of waste heat resources while avoiding the risks of equipment failure and operational instability caused by overload production. The control logic is more in line with the actual industrial site conditions.

[0042] Formula (4) is shown below: ; In formula (4), The dynamic adjustment range for production scheduling; The threshold for matching waste heat to production load; This refers to the instantaneous feed rate of the production line.

[0043] It should be noted that Formula (4) is constructed based on the principle of working condition deviation correction. It is used to quantify the deviation between the current production load and the optimal waste heat matching load, and to provide accurate quantitative basis for production scheduling adjustment. The current instantaneous feed rate is the actual production load, and the matching threshold is the optimal load allowed by the waste heat working condition. The absolute value of the difference between the two is the load range that needs to be adjusted. The physical logic of Formula (4) is intuitive and clear. The deviation value directly reflects the degree of mismatch between production scheduling and waste heat working condition. There is no calculation deviation. Formula (4) abandons the existing fuzzy interval adjustment and experience adjustment mode, realizes accurate quantification of production scheduling adjustment amount, and provides key data support for automation control.

[0044] Furthermore, formula (4) has high quantification accuracy, can accurately locate the magnitude of load deviation, realize refined production scheduling adjustment, and avoid the problems of over-adjustment and under-adjustment; it has fast response speed, matching the high-speed computing requirements of industrial real-time control; it is fully based on the working condition deviation for automatic calculation, with a high degree of automation; it matches the fluctuation of the entire working condition, and can accurately output the adjustment range and correct the production working condition whether the load is too high or too low.

[0045] S4. Dynamically optimize production scheduling based on the dynamic adjustment range of production scheduling. Note that the following points should be noted in this step: In a preferred embodiment, the method for dynamically optimizing production scheduling based on the dynamic adjustment range of production scheduling specifically includes: The PLC dynamically adjusts the production schedule. Performing accurate production scheduling adjustments includes: adjusting the instantaneous feed rate of the production line. Waste heat exceeding the production load matching threshold If this occurs, it indicates that the current production load is too high, the waste heat boiler cannot handle all the waste heat, resulting in waste heat being discharged and wasted. The PLC will then automatically reduce the instantaneous feed rate of the production line. Lowered to the waste heat matching threshold of production load That is, the PLC's adaptive PID controller will dynamically adjust the production scheduling range. As a downward adjustment, the adaptive PID controller automatically calculates a control command based on this adjustment and converts it into a standard industrial signal (such as a 4-20mA current signal) to send to the frequency converter. Upon receiving this industrial signal, the frequency converter adjusts its output frequency accordingly to control the motor's rotation speed and thus the instantaneous feed rate of the production line. Lowered to the waste heat matching threshold of production load When the instantaneous feed rate of the production line Waste heat less than the production load matching threshold This indicates that the current waste heat production capacity is sufficient and the equipment recovery capacity is excessive. The control system PLC automatically increases the instantaneous feed rate of the production line. Adjusted to the waste heat matching threshold of production load That is, the PLC's adaptive PID controller will dynamically adjust the production scheduling range. As the adjustment amount, the adaptive PID controller automatically calculates a control command based on this adjustment amount and converts it into a standard industrial signal (such as a 4-20mA current signal) to send to the frequency converter. After receiving the industrial signal, the frequency converter adjusts its output frequency accordingly to control the motor's rotation speed and increase the instantaneous feed rate of the production line. Adjusted to the waste heat matching threshold of production load This automatically increases production load, maximizes the utilization of waste heat resources, and achieves the optimal match between production capacity and waste heat. The PLC dynamically adjusts daily and shift production schedules based on real-time load fluctuations, regulates process production rhythms, and avoids inefficient production during periods of waste heat mismatch.

[0046] S5. After dynamically optimizing the production scheduling, adaptive reverse adjustment of the waste heat recovery operating conditions is performed. It should be noted that the following points apply to this step: In a preferred embodiment, the method for adaptive reverse adjustment of waste heat recovery operation specifically includes: After completing the dynamic optimization of production scheduling, the control system calls formula (5) to calculate the dynamic adjustment range of the waste heat recovery medium flow rate. The instantaneous flow rate of the waste heat boiler is dynamically adjusted according to the dynamic adjustment range of the waste heat recovery medium flow rate, which includes: when > At that time, the PLC controls the flow valve to increase the instantaneous medium flow rate of the waste heat boiler to [a certain value]. This enhances the heat exchange capacity of the waste heat boiler and fully utilizes high-grade waste heat; when < At that time, the PLC controls the flow valve to reduce the instantaneous medium flow rate of the waste heat boiler to [a certain value]. This reduces the ineffective energy consumption of the waste heat boiler and avoids the heat exchanger running at low loads. It also enables accurate matching between the waste heat boiler and dynamic production scheduling, achieving bidirectional linkage control.

[0047] In a preferred embodiment, formula (5) is as follows: ; In formula (5), The dynamic adjustment range of the waste heat recovery medium flow rate; The instantaneous total waste heat capacity of the flue gas; This refers to the instantaneous and effective recovery capacity of waste heat boilers; This refers to the instantaneous medium flow rate of the waste heat boiler.

[0048] It should be noted that formula (5) is an important formula for reverse linkage control, which realizes the adaptive adjustment of the waste heat recovery working condition under the fluctuation of production load. When there is a deviation between the total waste heat production capacity of flue gas and the effective recovery capacity of the equipment, it means that the current medium flow rate cannot match the waste heat output working condition: if the waste heat production capacity is greater than the recovery capacity, it means that the medium flow rate is insufficient and the waste heat recovery is inadequate; if the waste heat production capacity is less than the recovery capacity, it means that the medium flow rate is excessive and the equipment's ineffective energy consumption is increased. Formula (5) calculates the flow rate adjustment range of the medium through the energy deviation ratio, accurately reflects the working condition matching requirements of the waste heat boiler, and realizes the dynamic fluctuation of the waste heat boiler's reverse matching production schedule.

[0049] Furthermore, formula (5) constructs a two-way linkage closed loop, which not only realizes the matching of production scheduling with waste heat, but also realizes the matching of waste heat recovery with production, solving the defects of unidirectional control and mismatch of operating conditions in the existing technology; the proportional adjustment mode is smooth, stable and without sudden change, which can effectively protect the heat exchanger and reduce the start-up and shutdown losses of the equipment; accurately eliminate the deviation of waste heat supply and demand, maximize the utilization rate of waste heat recovery, and reduce the ineffective energy consumption of waste heat boiler.

[0050] Furthermore, the antimony smelting flue gas waste heat recovery and production scheduling linkage control method of the present invention also includes: Full-condition steady-state monitoring and iterative optimization means that the PLC continuously and in real time executes the above steps, monitors waste heat utilization rate, production energy consumption and equipment operating parameters throughout the process, corrects linkage control parameters in real time, maintains the dynamic optimal coupling state of waste heat output, production load and waste heat recovery, and achieves long-term stable and efficient energy-saving automated production management and control.

[0051] This invention pioneers a two-way linkage control system for flue gas waste heat recovery and production scheduling specifically for antimony smelting, breaking through the technical barriers of traditional independent process operation and constructing a dynamic coupled control mode. The corresponding control formula of this invention differs from existing general estimation models, significantly improving calculation and control accuracy. It achieves two-way dynamic adjustment of production scheduling to positively match waste heat output and waste heat recovery conditions to negatively match production load, abandoning the traditional fixed parameter and manual experience-based control mode, and greatly improving the level of automation and refined control. It matches the fluctuations of raw materials, flue gas parameters, and production load in antimony smelting under all operating conditions, solving the defects of poor operating condition matching, waste heat waste, and high equipment wear in existing technologies.

[0052] This invention aims to overcome the technical shortcomings of existing antimony smelting production, such as independent operation of waste heat recovery systems and production scheduling systems, poor dynamic matching, low waste heat utilization rate, high production energy consumption, and poor equipment operational stability. It provides a method for the coordinated control of waste heat recovery and production scheduling in antimony smelting flue gas. This invention establishes a real-time parameter acquisition system covering all operating conditions, constructs corresponding coordinated control formulas, and establishes a two-way linkage mechanism between the dynamic output characteristics of flue gas waste heat and the smelting production load and waste heat recovery conditions. This achieves dynamic optimization of production scheduling based on waste heat output and accurate matching of waste heat recovery conditions with production load, maximizing the utilization rate of waste heat recovery from flue gas, stabilizing production conditions, reducing equipment wear, and decreasing overall smelting energy consumption and carbon emissions. It also solves the defects of traditional technologies, such as process fragmentation, fixed parameters, and poor matching.

[0053] It should be recognized that embodiments of the present invention may be implemented or carried out by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer-readable storage medium.

[0054] The method can be implemented using standard programming techniques, including a non-transitory computer-readable storage medium configured with a computer program in the computer program, wherein the storage medium is configured such that the computer operates in a specific and predefined manner.

[0055] Each program can be implemented in a high-level procedural or object-oriented programming language to communicate with the computer system; however, if necessary, the program can be implemented in assembly or machine language.

[0056] In any case, the language can be either compiled or interpreted.

[0057] Furthermore, for this purpose, the program can run on a programmed application-specific integrated circuit.

[0058] The processes described herein (or variations and / or combinations thereof) can be executed under the control of one or more computer systems configured with executable instructions, and can be implemented by hardware or a combination thereof as code (e.g., executable instructions, one or more computer programs, or one or more applications) that commonly executes on one or more processors. The computer program includes a plurality of instructions executable by one or more processors.

[0059] Furthermore, the method can be implemented in any suitable computing platform, including but not limited to personal computers, minicomputers, mainframes, workstations, networked or distributed computing environments, standalone or integrated computer platforms, or in communication with charged particle tools or other imaging devices.

[0060] Various aspects of the present invention can be implemented in machine-readable code stored on a non-transitory storage medium or device, whether portable or integrated into a computing platform, such as a hard disk, optical read and / or write storage medium, RAM, ROM, etc., such that it can be read by a programmable computer, and when the storage medium or device is read by the computer, it can be used to configure and operate the computer to perform the processes described herein.

[0061] Furthermore, machine-readable code, or parts thereof, can be transmitted via wired or wireless networks.

[0062] When such media includes instructions or programs that combine with a microprocessor or other data processor to implement the steps described above, the invention described herein includes these and other different types of non-transitory computer-readable storage media.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for linking waste heat recovery and production scheduling control of antimony smelting flue gas, characterized in that, include: Real-time synchronous acquisition of all operating parameters for waste heat recovery and production scheduling in antimony smelting flue gas; After real-time synchronous acquisition of all operating parameters, the PLC calculates key waste heat indicators in real time. The optimal production load and adjustment amount are dynamically calculated based on key waste heat indicators calculated in real time. Dynamic optimization of production scheduling is performed based on the dynamic adjustment range of production scheduling. After dynamic optimization of production scheduling, adaptive reverse adjustment of waste heat recovery conditions is carried out.

2. The method for linking waste heat recovery and production scheduling in antimony smelting flue gas according to claim 1, characterized in that, A method for real-time synchronous acquisition of parameters for waste heat recovery and production scheduling in antimony smelting flue gas under all operating conditions specifically includes: The system uses various preset sensors to collect basic parameters for waste heat recovery and production scheduling of antimony smelting flue gas in real time at a set sampling frequency, and then transmits these basic parameters to the PLC in real time.

3. The method for linking waste heat recovery and production scheduling in antimony smelting flue gas according to claim 2, characterized in that, The basic parameters specifically include: Instantaneous volumetric flow rate of flue gas It uses an ultrasonic flow meter installed on the main flue gas duct to collect and transmit data to the PLC; Instantaneous average temperature of flue gas It is the arithmetic mean of the temperature values ​​collected in real time by temperature sensor 1, temperature sensor 2 and temperature sensor 3 and sent to the PLC. Temperature sensor 1, temperature sensor 2 and temperature sensor 3 are respectively arranged at the boiler inlet, heat exchanger and boiler outlet of the waste heat boiler. Standard constant pressure specific heat capacity of flue gas It uses a flue gas analyzer to collect the volume percentage of SO2, O2, N2 and dust in the flue gas in real time and transmits it to the PLC. The PLC then uses this data to calculate the standard constant pressure volumetric specific heat capacity of the flue gas in real time. The flue gas analyzer is installed in the main flue gas pipeline. Instantaneous feed rate of the production line It is an electronic belt scale installed on the feed belt of antimony ore raw material that collects the amount of antimony ore conveyed on the feed belt in real time and transmits it to the PLC. Effective smelting calorific value of raw materials The calorific value analyzer collects the calorific value of the antimony ore raw material in real time and transmits it to the PLC. The calorific value analyzer is set between the end of the feed belt of the antimony ore raw material and the front end of the feed inlet of the roasting furnace. Instantaneous heat exchange temperature difference of waste heat boiler It uses temperature sensors four and five to collect the flue gas inlet temperature and heat pipe outlet temperature of the heat exchanger in real time and transmits them to the PLC. The PLC uses the difference between the flue gas inlet temperature and the heat pipe outlet temperature as the instantaneous heat exchange temperature difference of the waste heat boiler. Temperature sensor four and temperature sensor five are respectively installed at the flue gas inlet of the heat exchanger and the outlet of the heat pipe; Ambient reference temperature of flue gas The temperature sensor, which is installed in the workshop where antimony smelting and flue gas waste heat recovery are located, collects the temperature value in real time and transmits it to the PLC. Instantaneous medium flow rate of waste heat boiler It is an electromagnetic flow meter that collects the instantaneous volumetric flow rate of the heat transfer medium in real time and transmits it to the PLC. The electromagnetic flow meter is installed on the pipeline with a flow valve that connects the heat pipe and the working medium storage tank.

4. The method for linking waste heat recovery and production scheduling in antimony smelting flue gas according to claim 3, characterized in that, The PLC stores the rated heat exchange area of ​​the waste heat boiler. ; The PLC also stores the density of the heat transfer medium. Rated design load of the production line The cross-sectional area of ​​the heat pipes in the heat exchanger .

5. The method for linking waste heat recovery and production scheduling in antimony smelting flue gas according to claim 4, characterized in that, Methods for real-time calculation of key waste heat indicators using PLCs include: The PLC uses formulas (1) and (2) to calculate the instantaneous total waste heat capacity of the flue gas in real time. and the instantaneous effective recovery capacity of waste heat boilers .

6. The method for linking waste heat recovery and production scheduling in antimony smelting flue gas according to claim 5, characterized in that, Formula (1) is shown below: ； In formula (1), The instantaneous total waste heat capacity of the flue gas; This refers to the instantaneous volumetric flow rate of the flue gas. The standard isobaric volumetric specific heat capacity of flue gas; The instantaneous average temperature of the flue gas; The ambient reference temperature of the flue gas; Formula (2) is shown below: ； In formula (2), This refers to the instantaneous and effective recovery capacity of waste heat boilers; This refers to the rated heat exchange area of ​​the waste heat boiler. This refers to the instantaneous heat exchange temperature difference in the waste heat boiler. This refers to the instantaneous medium flow rate of the waste heat boiler. The density of the heat transfer medium; The specific heat capacity at constant pressure of the heat transfer medium; This refers to the cross-sectional area of ​​the heat pipes in the heat exchanger.

7. The method for linking waste heat recovery and production scheduling in antimony smelting flue gas according to claim 6, characterized in that, The method for dynamically calculating optimal production load and adjustment based on real-time calculated key waste heat indicators specifically includes: Based on the real-time calculation of key waste heat indicators, formula (3) is used to calculate the waste heat matching threshold of the production load corresponding to the current waste heat operating condition. Then, the dynamic adjustment range of production scheduling is calculated using formula (4). .

8. The method for linking waste heat recovery and production scheduling in antimony smelting flue gas according to claim 7, characterized in that, Formula (3) is shown below: ； In formula (3), The threshold for matching waste heat to production load; This refers to the instantaneous and effective recovery capacity of waste heat boilers; The instantaneous total waste heat capacity of the flue gas; This is the rated design load of the production line; Formula (4) is shown below: ； In formula (4), The dynamic adjustment range for production scheduling; The threshold for matching waste heat to production load; This refers to the instantaneous feed rate of the production line.

9. The method for linking waste heat recovery and production scheduling in antimony smelting flue gas according to claim 8, characterized in that, The method for dynamically optimizing production scheduling based on the dynamic adjustment range of production scheduling specifically includes: When the instantaneous feed rate of the production line Waste heat exceeding the production load matching threshold At that time, the PLC automatically reduces the instantaneous feed rate of the production line. Lowered to the waste heat matching threshold of production load That is, the PLC's adaptive PID controller will dynamically adjust the production scheduling range. As a downward adjustment, the adaptive PID controller automatically calculates a control command based on this adjustment and converts it into a standard industrial signal to send to the frequency converter. Upon receiving this industrial signal, the frequency converter adjusts its output frequency accordingly to control the motor's rotation speed and thus the instantaneous feed rate of the production line. Lowered to the waste heat matching threshold of production load When the instantaneous feed rate of the production line Waste heat less than the production load matching threshold At that time, the control system PLC automatically increases the instantaneous feed rate of the production line. Adjusted to the waste heat matching threshold of production load That is, the PLC's adaptive PID controller will dynamically adjust the production scheduling range. As the adjustment amount, the adaptive PID controller automatically calculates a control command based on this adjustment amount and converts it into a standard industrial signal to send to the frequency converter. After receiving the industrial signal, the frequency converter adjusts its output frequency accordingly to control the motor's rotation speed and increase the instantaneous feed rate of the production line. Adjusted to the waste heat matching threshold of production load .

10. The method for linking waste heat recovery and production scheduling in antimony smelting flue gas according to claim 9, characterized in that, The method for adaptive reverse adjustment of waste heat recovery operation includes: After completing the dynamic optimization of production scheduling, the control system calls formula (5) to calculate the dynamic adjustment range of the waste heat recovery medium flow rate. The instantaneous flow rate of the waste heat boiler is dynamically adjusted according to the dynamic adjustment range of the waste heat recovery medium flow rate, which includes: when > At that time, the PLC controls the flow valve to increase the instantaneous medium flow rate of the waste heat boiler to [a certain value]. ;when < At that time, the PLC controls the flow valve to reduce the instantaneous medium flow rate of the waste heat boiler to [a certain value]. ; Formula (5) is shown below: ； In formula (5), The dynamic adjustment range of the waste heat recovery medium flow rate; The instantaneous total waste heat capacity of the flue gas; This refers to the instantaneous and effective recovery capacity of waste heat boilers; This refers to the instantaneous medium flow rate of the waste heat boiler.

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