A method for recovering waste heat, recycling steam and closed-loop control in a distillery

Abstract

The application discloses a kind of distillery's waste heat recovery, steam recycling and closed-loop control method, comprising the following steps: step one, working condition baseline data acquisition, step two, waste heat recovery system modularization adaptation design, step three, steam circulation path optimization construction, step four, closed-loop control logic parameter setting, step five, system linkage debugging and calibration, step six, real-time working condition monitoring and data acquisition, step seven, dynamic optimization adjustment mechanism operation, step eight, system maintenance and efficiency review;The application integrates flue gas waste heat recovery, condensate water waste heat recovery and steam cascade utilization technology, builds a modular, hierarchical energy utilization system, realizes the maximization of waste heat recovery and steam recycling, breaks the limitation of traditional single recovery mode, improves the comprehensiveness and pertinence of energy utilization.

Description

Technical Field

[0001] This invention relates to the field of energy-saving technology in distilled spirits brewing, specifically to a method for waste heat recovery, steam recycling, and closed-loop control in the grain steaming and distillation processes of baijiu, rice wine, and distilled spirits factories, belonging to the interdisciplinary field of industrial waste heat utilization and intelligent control. Background Technology

[0002] In the process of distilling spirits, the steaming of grains and the extraction of spirits require a large amount of steam and generate high-temperature flue gas, process condensate and other media containing residual heat. Traditional treatment methods mostly involve direct discharge, resulting in serious energy waste. At the same time, the existing steam supply mostly adopts an open single-process mode, with large fluctuations in steam parameters, which not only affects the stability of spirit quality, but also has problems such as high energy consumption and great environmental pressure.

[0003] Currently, some wineries are attempting to use single waste heat recovery devices or simple steam recovery pipelines, but these methods have the following drawbacks: First, waste heat recovery lacks specificity, failing to design recovery paths that take into account the differentiated heat requirements of the grain steaming and brewing processes, resulting in low recovery efficiency; second, the steam circulation path is fixed, and no adjustment mechanism has been established to dynamically match the production conditions, making it difficult to accurately control parameters such as steam dryness and pressure; third, there is a lack of a systematic closed-loop control system, making it impossible to provide real-time feedback on the waste heat recovery effect and steam utilization status, leading to poor system stability and difficulty in maintaining energy-saving effects in the long term. Summary of the Invention

[0004] The purpose of this invention is to provide a method for waste heat recovery, steam recycling, and closed-loop control in a winery, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for waste heat recovery, steam recycling, and closed-loop control in a winery, comprising the following steps:

[0006] Step 1: Baseline Data Acquisition: Collect equipment parameters, energy consumption data, and process requirements for the grain steaming and distillation processes, and establish a baseline database of operating conditions;

[0007] Step 2: Modular adaptation design of waste heat recovery system: Design flue gas waste heat recovery module, condensate waste heat recovery module and waste heat storage module, and match waste heat transmission pipeline;

[0008] Step 3: Steam Circulation Path Optimization and Construction: Construct the main circulation path, branch circulation paths, and supplementary paths to achieve cascade utilization of steam;

[0009] Step 4: Setting closed-loop control logic parameters: Set the control thresholds and adjustment rules for temperature, pressure, and waste heat utilization efficiency;

[0010] Step 5: System linkage debugging and calibration: Debugging and calibration of control parameters are carried out in stages of no-load, load, and fault simulation.

[0011] Step Six: Real-time Operating Condition Monitoring and Data Acquisition: Collect system operating data and generate an operating status report;

[0012] Step 7: Dynamic optimization and adjustment mechanism operation: Adjust system parameters based on monitoring data and changes in operating conditions;

[0013] Step 8: System Maintenance and Performance Review: Perform regular equipment maintenance and a performance review every six months.

[0014] Furthermore, the baseline operating data for step one includes the steam demand, steam temperature range, and flue gas temperature for the grain steaming process; the steam temperature at the top of the distillation tower, the condensate discharge volume and temperature, the equipment operating period, and the range of production capacity fluctuations for the distillation process.

[0015] Furthermore, the flue gas waste heat recovery module in step two adopts a shell-and-tube heat exchanger made of corrosion-resistant stainless steel, with an anti-dust coating on the inner wall of the pipe and a dust filter with a filtration accuracy of 5 microns at the outlet; the heat storage medium of the condensate waste heat recovery module is heat transfer oil, and the insulation layer is made of aluminum silicate material with a thickness of not less than 50 mm; the waste heat transmission pipeline adopts seamless steel pipe, wrapped with a polyurethane insulation layer, and the connection adopts a flange sealing structure.

[0016] Furthermore, in step three, the steam temperature for steaming grain generated in the main circulation path is 120-130℃ and the pressure is 0.6-0.8MPa; the steam temperature for extracting wine in the branch circulation path is 90-100℃, and the steam purification device adopts a multi-layer stainless steel filter structure; the volume of the steam buffer tank in the supplementary path is 15% of the maximum steam consumption.

[0017] Furthermore, in the temperature control logic of step four, the steam temperature of the grain steamer is 125±5℃, and the steam temperature at the top of the distillation tower is 95±3℃; in the pressure control logic, the pressure of the main steam pipeline is 0.7±0.05MPa.

[0018] Furthermore, the load debugging in step five is carried out in stages according to 50%, 80%, and 100% of the normal production capacity, and the fault simulation debugging includes scenarios such as heat exchanger blockage and sudden drop in steam pressure.

[0019] Furthermore, the monitoring data in step six includes steam temperature, pressure, flow rate, waste heat medium temperature, flow rate, and heat exchanger efficiency.

[0020] Furthermore, the maintenance plan in step eight includes cleaning the heat exchanger surface weekly, replacing the steam purification device filter monthly, testing the heat storage medium quarterly, and conducting a system performance review every six months.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] This invention integrates flue gas waste heat recovery, condensate waste heat recovery, and steam cascade utilization technologies to construct a modular and graded energy utilization system. This system maximizes waste heat recovery and steam recycling, breaking the limitations of traditional single-recovery models and improving the comprehensiveness and specificity of energy utilization. Through baseline data acquisition and modular design, the waste heat recovery system is precisely matched to the winery's production equipment and capacity requirements, avoiding the compatibility issues of general-purpose systems and ensuring the synergy between system operation and production processes. A closed-loop control logic and dynamic optimization mechanism centered on temperature, pressure, and efficiency are established, enabling real-time response to changes in production conditions, timely adjustment of system parameters, and ensuring the stability of steam parameters, thereby improving the consistency of wine quality. Attached Figure Description

[0023] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1 This invention provides a method for waste heat recovery, steam recycling, and closed-loop control in a winery, comprising the following steps:

[0026] Step 1: Baseline Data Acquisition

[0027] The operating parameters of core equipment such as the grain steaming pot and distillation tower in the winery were comprehensively collected. The steam demand, steam temperature range, and flue gas temperature of the grain steaming process were clearly defined, as well as the steam temperature at the top of the distillation tower, the amount and temperature of condensate discharge, and other production information such as equipment operating time and capacity fluctuation range were recorded. During the collection process, abnormal fluctuation data were removed, and a baseline database of operating conditions containing equipment parameters, energy consumption data, and process requirements was established to provide a basis for subsequent system design.

[0028] Step 2: Modular Adaptation Design of Waste Heat Recovery System

[0029] Based on baseline operating data, a modular waste heat recovery system is designed, including a flue gas waste heat recovery module, a condensate waste heat recovery module, and a waste heat storage module.

[0030] Flue gas waste heat recovery module: A shell-and-tube heat exchanger is connected in series in the flue gas duct of the grain steaming pot and distillation tower. The heat exchange area of ​​the heat exchanger is determined according to the flue gas flow rate and temperature difference. The heat exchanger is made of corrosion-resistant stainless steel. The inner wall of the pipe is treated with an anti-dust coating. A dust filter device is installed at the outlet of the heat exchanger with a filtration accuracy of 5 microns.

[0031] Condensate waste heat recovery module: A heat-insulating heat storage tank is connected to the grain steaming condensate discharge port and the wine extraction condensate collection tank. The heat storage tank is filled with heat transfer oil as the heat storage medium. The outer layer of the heat storage tank is wrapped with aluminum silicate insulation material with a thickness of not less than 50 mm. A drain port is set at the bottom of the heat storage tank and a pressure safety valve is set at the top.

[0032] Waste heat transfer pipeline: Seamless steel pipes are used as waste heat transfer pipelines. The pipe diameter is determined according to the waste heat medium flow rate. The outer layer of the pipe is wrapped with a polyurethane insulation layer. The pipeline connection adopts a flange sealing structure. Stop valves and check valves are set at key nodes to prevent medium backflow.

[0033] Step 3: Optimization and Construction of Steam Circulation Path

[0034] Based on the steam parameter requirements of the grain steaming and distillation processes, a graded steam circulation path is constructed:

[0035] Main circulation path: The cold water heated by the flue gas waste heat exchanger is sent to the steam generator, where it is mixed with the preheated hot water output from the condensate waste heat recovery module to generate high-temperature and high-pressure steam (temperature 120-130℃, pressure 0.6-0.8MPa) that meets the requirements for steaming grain, and then sent to the grain steaming pot through the main steam pipeline.

[0036] Branch circulation path: The low-temperature steam (90-100℃) discharged from the grain steaming pot is processed by the steam purification device to remove moisture and impurities from the steam. The purification device adopts a multi-layer stainless steel filter structure and is then transported to the distillation tower for the liquor extraction process, forming a "grain steaming-liquor extraction" steam cascade utilization.

[0037] Supplementary path: A steam buffer tank is set at the intersection of the main circulation path and the branch circulation path. The volume of the buffer tank is determined according to 15% of the maximum steam consumption. It is used to balance the steam pressure fluctuation. When the steam pressure is lower than the set value, the standby steam generator is started to supplement the steam.

[0038] Step 4: Setting Closed-Loop Control Logic Parameters

[0039] Establish a closed-loop control logic centered on process parameters, and set control parameter thresholds and adjustment rules:

[0040] Temperature control logic: The steam temperature of the grain steamer is set to 125±5℃. When the temperature is lower than the lower limit, the flow rate of the heat exchange medium in the flue gas heat exchanger is increased, and the heating power of the steam generator is increased. When the temperature is higher than the upper limit, the flow rate of the heat exchange medium is reduced, and the steam pressure relief valve is opened. The steam temperature at the top of the distillation tower in the wine extraction process is set to 95±3℃. Temperature control is achieved by adjusting the steam flow rate of the branch circulation path.

[0041] Pressure control logic: The pressure of the main steam pipeline is set to 0.7±0.05MPa. When the pressure is higher than the upper limit, the pressure relief valve of the buffer tank is opened. When the pressure is lower than the lower limit, the backup steam supply device is activated.

[0042] Waste heat utilization efficiency control logic: Set a benchmark value for waste heat recovery efficiency. When the actual recovery efficiency is lower than the benchmark value, adjust the flow rate of the heat exchange medium in the heat exchanger and clean the ash accumulated on the surface of the heat exchanger.

[0043] Step 5: System Integration Debugging and Calibration

[0044] The waste heat recovery module, steam circulation path, and closed-loop control system were integrated and tested together.

[0045] No-load commissioning: Start the waste heat recovery system and steam circulation pipeline without introducing production medium, check the pipeline sealing, valve opening and closing flexibility and heat exchanger operating status to ensure there are no leaks or jams;

[0046] Load commissioning: Conduct load tests in stages according to 50%, 80%, and 100% of normal production capacity, record the waste heat recovery efficiency, steam temperature and pressure fluctuations at each stage, calibrate the parameter thresholds of closed-loop control, and ensure that the steam parameters meet the process requirements.

[0047] Fault simulation debugging: Simulate fault scenarios such as heat exchanger blockage and sudden drop in steam pressure to test the emergency response capability of the closed-loop control system and ensure that the system can automatically switch to standby mode when a fault occurs, without affecting production operation.

[0048] Step Six: Real-time Operating Condition Monitoring and Data Acquisition

[0049] Monitoring points are set up at key nodes in the steam circulation path and at the inlet and outlet of the waste heat recovery module to collect data such as steam temperature, pressure, flow rate, waste heat medium temperature and flow rate, and heat exchanger efficiency. The data is collected via wired transmission and sent to the control center for storage and analysis, generating a real-time system operation status report that includes waste heat recovery, steam consumption, and parameter fluctuations.

[0050] Step 7: Operation of the dynamic optimization and adjustment mechanism

[0051] Based on real-time monitoring data and changes in production conditions, dynamic optimization and adjustments are initiated:

[0052] When the winery's production capacity increases, the flow rate of the heat exchange medium in the waste heat recovery module is increased, the conveying capacity of the steam circulation path is expanded, and the parameter thresholds of the closed-loop control are adjusted simultaneously to adapt to the changing production capacity requirements.

[0053] When the ambient temperature drops, the insulation effect of the waste heat storage module is enhanced, and the heating power of the steam generator is increased to compensate for heat loss.

[0054] When the waste heat recovery efficiency remains below the baseline value, an equipment maintenance warning is issued, prompting the user to clean the heat exchanger or replace the filter to ensure the system continues to operate efficiently.

[0055] Step 8: System Maintenance and Performance Review

[0056] Establish a regular maintenance plan: clean the surface of the heat exchanger of the waste heat recovery module weekly, replace the filter of the steam purification device monthly, test the heat storage medium quarterly, and replenish or replace deteriorated heat transfer oil; conduct a system performance review every six months, compare the baseline data with the actual operating data, evaluate the maintenance of waste heat recovery efficiency and steam utilization rate, and adjust system parameters according to the review results to ensure long-term operational stability.

[0057] Example:

[0058] Step 1: Baseline Data Acquisition

[0059] A liquor distillery was selected as the implementation subject. This distillery has 3 grain steaming pots and 2 sets of distillation towers, mainly producing strong-aroma liquor. The steam requirement for the grain steaming process is 5 tons per hour, with a required steam temperature of 125℃ and an exhaust gas temperature of 220℃. The steam temperature at the top of the distillation towers in the liquor extraction process is 98℃, with a condensate discharge rate of 3 tons per hour and a condensate temperature of 85℃. The equipment operates daily from 8:00 AM to 8:00 PM, with production capacity fluctuating between 70% and 110% of the designed capacity. Data showing sudden increases in exhaust gas temperature due to equipment malfunctions during the data collection process were excluded, and a baseline database of operating conditions was established.

[0060] Step 2: Modular Adaptation Design of Waste Heat Recovery System

[0061] Flue gas waste heat recovery module: One shell-and-tube heat exchanger is connected in series at the exhaust ducts of each of the three grain steaming pots, with a heat exchange area of ​​20m². 2 The material is 304 stainless steel, the inner wall of the pipe is coated with polytetrafluoroethylene anti-dust coating, and a metal filter with a filtration accuracy of 5 microns is installed at the outlet of the heat exchanger.

[0062] Condensate waste heat recovery module: Connect one 10m³ volume unit to the condensate drain outlet of the grain steaming pot and the condensate collection tank at the wine extraction point. 3 The insulated thermal storage tank is filled with No. 320 heat transfer oil and wrapped with 50 mm thick aluminum silicate insulation material. The bottom of the thermal storage tank is equipped with a DN50 drain port and the top is equipped with a safety valve with a pressure of 1.0 MPa.

[0063] Waste heat transfer pipeline: DN100 seamless steel pipe is used as the transfer pipeline. The outer layer of the pipeline is wrapped with a 30 mm thick polyurethane insulation layer. The pipeline connection adopts a PN1.6MPa flange sealing structure. Shut-off valves and check valves are installed at key nodes such as heat exchanger outlet and heat storage tank inlet.

[0064] Step 3: Optimization and Construction of Steam Circulation Path

[0065] Main circulation path: The cold water (temperature 60-70℃) heated by the flue gas heat exchanger is sent to the steam generator, where it is mixed with the preheated hot water (temperature 80-90℃) output from the condensate waste heat storage tank. The mixture is then heated by the steam generator to generate high-temperature and high-pressure steam at 125℃ and 0.7MPa, which is then sent to the three grain steaming pots via the DN150 main steam pipeline.

[0066] Branch circulation path: The 95℃ low-temperature steam discharged from the grain steamer is treated by a steam purification device with a multi-layer stainless steel filter structure, and then transported to two sets of distillation towers through DN80 branch pipelines for distillation operations in the wine extraction process.

[0067] Supplementary path: A steam buffer tank with a volume of 0.75m³ is installed at the junction of the main steam pipeline and the branch pipeline. A pressure relief valve is installed on the top of the buffer tank. When the steam pressure exceeds 0.75MPa, it will automatically release pressure. When the pressure is lower than 0.65MPa, the standby steam generator will be started to supplement steam.

[0068] Step 4: Setting Closed-Loop Control Logic Parameters

[0069] Temperature control: The steam temperature of the grain steamer is set to 125±5℃. When the temperature is below 120℃, the flow rate of the heat transfer oil in the flue gas heat exchanger is increased to improve the heating power of the steam generator. When the temperature is above 130℃, the flow rate of the heat transfer oil is reduced and the steam pressure relief valve is opened. The steam temperature at the top of the distillation tower is set to 95±3℃. Temperature control is achieved by adjusting the opening of the steam flow valve in the branch pipe.

[0070] Pressure control: The main steam pipeline pressure is set to 0.7±0.05MPa. When the pressure is higher than 0.75MPa, the buffer tank pressure relief valve opens; when the pressure is lower than 0.65MPa, the standby steam generator starts.

[0071] Efficiency control: Set a baseline value for waste heat recovery efficiency. When the actual recovery efficiency is lower than the baseline value, adjust the flow rate of the heat transfer oil in the heat exchanger and start the heat exchanger surface cleaning program.

[0072] Step 5: System Integration Debugging and Calibration

[0073] No-load commissioning: Start the waste heat recovery system and steam circulation pipeline, shut off the production medium input, check that there are no leaks at each connection point of the pipeline, that the valves open and close flexibly, that the heat exchanger operates without abnormal noise, and that the filter device is securely installed.

[0074] Load commissioning: Test in stages according to 50% capacity (2.5 tons of steam per hour), 80% capacity (4 tons of steam per hour), and 100% capacity (5 tons of steam per hour). Record the steam temperature fluctuation range of the grain steamer as 123-127℃, the steam temperature fluctuation range of the top of the distillation tower as 93-97℃, and the pressure fluctuation as 0.68-0.72MPa. Calibrate the control parameter thresholds to ensure compliance with process requirements.

[0075] Fault simulation debugging: Simulate heat exchanger blockage scenario. After the system detects a decrease in heat exchange efficiency, it automatically adjusts the flow rate of heat transfer oil and issues a maintenance warning at the same time; simulate steam pressure drop scenario. The backup steam generator starts within 10 seconds to maintain stable steam pressure.

[0076] Step Six: Real-time Operating Condition Monitoring and Data Acquisition

[0077] Monitoring points are set up at key nodes such as the main steam pipeline, branch steam pipelines, heat exchanger inlet and outlet, and heat storage tank to collect data such as steam temperature, pressure, flow rate, heat transfer oil temperature, flow rate, and heat exchanger efficiency in real time. The data is transmitted to the control center via wired transmission, and a system operation status report is generated every hour, recording the amount of waste heat recovery, steam consumption, and parameter fluctuations.

[0078] Step 7: Operation of the dynamic optimization and adjustment mechanism

[0079] When the winery's production capacity increases to 110% of its designed capacity (5.5 tons of steam per hour), the system automatically increases the flow rate of the heat transfer oil in the flue gas heat exchanger, expands the steam output of the steam buffer tank, and adjusts the steam temperature threshold of the grain steamer to 124-126℃ to ensure that the steam supply meets the production capacity requirements. When the ambient temperature drops below 5℃, the system strengthens the insulation measures of the heat storage tank, increases the initial heating temperature of the steam generator, and compensates for the environmental heat loss. When the waste heat recovery efficiency is detected to be lower than the benchmark value, the system adjusts the flow rate of the heat transfer oil in the heat exchanger and prompts the staff to clean the ash accumulated on the surface of the heat exchanger.

[0080] Step 8: System Maintenance and Performance Review

[0081] According to the maintenance plan, staff will clean the ash on the surface of the heat exchanger every week, replace the stainless steel filter screen of the steam purification device every month, test the quality of the heat transfer oil in the heat storage tank every quarter, and replenish the deteriorated heat transfer oil. The system performance will be reviewed every six months, comparing the baseline data of the operating conditions with the actual operating data to evaluate the waste heat recovery effect and the stability of steam utilization. The control parameter thresholds will be adjusted according to the review results to ensure the long-term efficient operation of the system.

[0082] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for waste heat recovery, steam recycling, and closed-loop control in a winery, characterized in that: Includes the following steps: Step 1: Baseline Data Acquisition: Collect equipment parameters, energy consumption data, and process requirements for the grain steaming and distillation processes, and establish a baseline database of operating conditions; Step 2: Modular adaptation design of waste heat recovery system: Design flue gas waste heat recovery module, condensate waste heat recovery module and waste heat storage module, and match waste heat transmission pipeline; Step 3: Steam Circulation Path Optimization and Construction: Construct the main circulation path, branch circulation paths, and supplementary paths to achieve cascade utilization of steam; Step 4: Setting closed-loop control logic parameters: Set the control thresholds and adjustment rules for temperature, pressure, and waste heat utilization efficiency; Step 5: System linkage debugging and calibration: Debugging and calibration of control parameters are carried out in stages of no-load, load, and fault simulation. Step Six: Real-time Operating Condition Monitoring and Data Acquisition: Collect system operating data and generate an operating status report; Step 7: Dynamic optimization and adjustment mechanism operation: Adjust system parameters based on monitoring data and changes in operating conditions; Step 8: System Maintenance and Performance Review: Perform regular equipment maintenance and a performance review every six months.

2. The method for waste heat recovery, steam recycling, and closed-loop control in a winery according to claim 1, characterized in that: The baseline operating data for step one includes the steam demand, steam temperature range, and flue gas temperature for the grain steaming process; the steam temperature at the top of the distillation tower, the condensate discharge volume and temperature, the equipment operating time, and the range of production capacity fluctuations for the distillation process.

3. The method for waste heat recovery, steam recycling, and closed-loop control in a winery according to claim 1, characterized in that: The flue gas waste heat recovery module in step two uses a shell-and-tube heat exchanger made of corrosion-resistant stainless steel. The inner wall of the pipe is coated with an anti-dust coating, and the outlet is equipped with a dust filter with a filtration accuracy of 5 microns. The heat storage medium of the condensate waste heat recovery module is heat transfer oil, and the insulation layer is made of aluminum silicate material with a thickness of not less than 50 mm. The waste heat transmission pipeline uses seamless steel pipe, wrapped with a polyurethane insulation layer, and the connection adopts a flange sealing structure.

4. The method for waste heat recovery, steam recycling, and closed-loop control in a winery according to claim 1, characterized in that: The steam temperature for steaming grains generated in the main circulation path of step three is 120-130℃, and the pressure is 0.6-0.8MPa; the steam temperature for extracting wine in the branch circulation path is 90-100℃, and the steam purification device adopts a multi-layer stainless steel filter structure; the volume of the steam buffer tank in the supplementary path is 15% of the maximum steam consumption.

5. The method for waste heat recovery, steam recycling, and closed-loop control in a winery according to claim 1, characterized in that: In the temperature control logic of step four, the steam temperature of the grain steamer is 125±5℃, and the steam temperature at the top of the distillation tower is 95±3℃; in the pressure control logic, the pressure of the main steam pipeline is 0.7±0.05MPa.

6. The method for waste heat recovery, steam recycling, and closed-loop control in a winery according to claim 1, characterized in that: The load commissioning in step five is carried out in stages according to 50%, 80%, and 100% of the normal production capacity. The fault simulation commissioning includes scenarios such as heat exchanger blockage and sudden drop in steam pressure.

7. The method for waste heat recovery, steam recycling, and closed-loop control in a winery according to claim 1, characterized in that: The monitoring data in step six includes steam temperature, pressure, flow rate, waste heat medium temperature, flow rate, and heat exchanger efficiency.

8. The method for waste heat recovery, steam recycling, and closed-loop control in a winery according to claim 1, characterized in that: The maintenance plan in step eight includes cleaning the heat exchanger surface weekly, replacing the steam purification device filter monthly, testing the heat storage medium quarterly, and reviewing the system performance every six months.

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