A Sodium Methyl Methoxide Conversion Heat Recovery Control System Based on Digital Twin Technology Heat Pump

Abstract

A sodium methoxide conversion heat recovery control system based on digital twin technology includes a superheated water tank, a solution reaction device, and a sodium methoxide conversion unit. The superheated water tank is equipped with hot water pipelines that flow sequentially through the solution reaction device and the sodium methoxide conversion unit before entering a high-temperature storage tank. The system also includes a high-temperature magnetic levitation heat pump unit with a high-temperature evaporator and a high-temperature condenser. A digital twin model is used to acquire and update real-time data during operation. Based on the currently input real-time data, the system simulates the operating status of the heat recovery control system in real time. This invention utilizes the digital twin model to predict when the heat recovery control system may experience abnormalities or deviate from its optimal operating state. Based on the prediction results, adjustment commands are issued in advance to automatically adjust the operating parameters of the magnetic levitation heat pump unit or the working status of the system equipment, ensuring that the system can efficiently respond to flow changes and maintain stable heat recovery efficiency.

Description

Technical Field

[0001] This invention relates to the field of sodium methoxide conversion heat recovery technology, and in particular to a sodium methoxide conversion heat recovery control system based on a digital twin technology heat pump. Background Technology

[0002] The conversion of sodium methoxide generates a large amount of methanol vapor. Recovering the heat energy from this methanol vapor and using it for heating other processes or equipment effectively reduces the demand for other energy sources (such as coal, natural gas, and electricity), thereby lowering energy consumption and production costs. For example, in chemical production, using the heat energy of methanol vapor to preheat raw material liquids can reduce the steam or electricity consumption required in subsequent heating processes.

[0003] In existing methanol vapor recovery schemes, the latent heat recovery process involves complex heat exchange and fluid flow. Traditional methods are insufficient to obtain system status information, and the operation of the heat recovery system requires continuous adjustment of control parameters based on actual operating conditions in order to achieve the best recovery effect. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a sodium methoxide conversion heat recovery control system based on digital twin technology for heat pumps, which solves the problems of traditional heat recovery systems having difficulty obtaining system status information and being unable to adjust control parameters according to actual operating conditions, resulting in low heat recovery efficiency.

[0005] To achieve the above objectives, the present invention employs the following technical solution: a sodium methoxide conversion heat recovery control system based on digital twin technology heat pump, comprising a superheated water tank, a solution reaction device, and a sodium methoxide conversion unit. The superheated water tank is equipped with a hot water pipeline, which flows sequentially through the solution reaction device and the sodium methoxide conversion unit before entering a high-temperature water storage tank. The system also includes:

[0006] The high-temperature magnetic levitation heat pump unit has a high-temperature evaporator and a high-temperature condenser. The high-temperature evaporator and the high-temperature water storage tank form a first circulation pipeline, and the high-temperature condenser and the superheated water tank form a second circulation pipeline.

[0007] The digital twin model is constructed based on the configuration of the heat recovery control system. The model is initialized and given initial operating parameters and performance indicators to initially simulate the system's operating state. During operation, real-time data is acquired and the digital twin model is updated. Based on the currently input real-time data, the operating state of the heat recovery control system is simulated in real time.

[0008] As a further improvement of the present invention, it also includes a low-temperature magnetic levitation heat pump unit, which has a low-temperature evaporator and a low-temperature condenser. The hot water pipeline enters the low-temperature condenser to absorb heat after passing through the sodium methoxide conversion unit. The energy absorbed comes from the heat exchange of the low-temperature evaporator and / or the work done by the low-temperature magnetic levitation heat pump unit. After absorbing heat and rising in temperature, the water flows to the high-temperature water storage tank.

[0009] As a further improvement of the present invention: the high-temperature water storage tank is provided with a water outlet pipe, and the water outlet pipe and the hot water pipe are mixed and enter the sodium methoxide conversion unit after passing through the solution reaction device.

[0010] As a further improvement of the present invention: the sodium methoxide conversion unit has a methanol vapor output pipeline, which is connected in sequence to an evaporative cooling unit, a gas-liquid separator, a vacuum pump and a cold water tank.

[0011] As a further improvement of the present invention: the low-temperature evaporator, the evaporative cooling unit, and the ambient temperature water storage tank constitute a third circulation pipeline. The ambient temperature water storage tank and the low-temperature evaporator are provided with a positional difference so that the water flowing out of the low-temperature evaporator flows naturally to the conventional water storage tank under the action of gravity. A pump set is provided between the conventional water storage tank and the evaporative cooling unit, and between the evaporative cooling unit and the low-temperature evaporator.

[0012] As a further improvement of the present invention: the digital twin model acquires the first real-time temperature T1 of the hot water pipeline at the inlet of the solution reaction device and updates it according to the real-time temperature. The updated digital twin model performs real-time simulation based on the current input real-time temperature and compares the deviation between the first real-time temperature T1 and the first operating temperature Q1 of the digital twin model before the update. The operating temperature refers to the simulated operating temperature in the digital twin model corresponding to the current real-time temperature acquisition position. It is determined whether the deviation exceeds the set threshold K1.

[0013] When the first real-time temperature T1 is lower than the first operating temperature Q1 of the digital twin model before the update, it is determined that Q1-T1>K1. If it is greater, an instruction to adjust the heat release work of the high-temperature condenser is output to raise the water temperature of the superheated water tank.

[0014] As a further improvement of the present invention: the digital twin model obtains the second real-time temperature T2 of the hot water pipeline at the outlet of the solution reaction device and updates it according to the real-time temperature. The updated digital twin model performs real-time simulation based on the current input real-time temperature and compares the deviation between the second real-time temperature T2 and the second operating temperature Q2 of the digital twin model before the update to determine whether the deviation exceeds the set threshold K2.

[0015] When the second real-time temperature T2 is lower than the second operating temperature Q2 of the digital twin model before the update, it is determined that Q2-T2>K2. If it is greater, an instruction to adjust the water supply from the hot water pipeline to the sodium methoxide converter is output, and an instruction to control the water supply from the outlet pipeline is also output, so that the water temperature after mixing in the outlet pipeline and the hot water pipeline reaches the temperature requirement of the sodium methoxide converter.

[0016] As a further improvement of the present invention: the digital twin model obtains the third real-time temperature T3 of the high-temperature water storage tank and updates it according to the real-time temperature. The updated digital twin model performs real-time simulation based on the current input real-time temperature and compares the deviation between the third real-time temperature T3 and the third operating temperature Q3 of the digital twin model before the update to determine whether the deviation exceeds the set threshold K3.

[0017] When the third real-time temperature T3 is lower than the third operating temperature Q3 of the digital twin model before the update, it is determined that Q3-T3>K3. If it is greater, an instruction to adjust the heat release work of the low-temperature condenser is output to raise the water temperature of the high-temperature water storage tank.

[0018] As a further improvement of the present invention: the digital twin model obtains the fourth real-time temperature T4 of the methanol vapor output pipeline and updates it according to the real-time temperature. The updated digital twin model performs real-time simulation based on the current input real-time temperature and compares the deviation between the fourth real-time temperature T4 and the fourth operating temperature Q4 of the digital twin model before the update to determine whether the deviation exceeds the set threshold K4.

[0019] When the fourth real-time temperature T4 is lower than the fourth operating temperature Q4 of the digital twin model before the update, it is determined that Q4-T4>K4. If it is greater, the fan of the evaporative cooling unit is adjusted to start so that the excessive heat in the methanol vapor output pipeline can be dissipated.

[0020] As a further improvement of the present invention: the digital twin model acquires and updates the operating information of the evaporative chiller. When the heat in the methanol vapor output pipeline is too high, the fan of the evaporative chiller starts to increase heat dissipation and outputs a command to control the third circulation pipeline to increase the flow rate in order to improve the heat exchange efficiency of the third circulation pipeline.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This invention utilizes a digital twin model to predict when the heat recovery control system may experience abnormalities or deviate from its optimal operating state. Based on the prediction results, it provides feedback and issues adjustment commands in advance to automatically adjust the operating parameters of the magnetic levitation heat pump unit or the working status of the system equipment, ensuring that the system can efficiently cope with changes in flow rate and maintain stable heat recovery efficiency. Attached Figure Description

[0023] To more clearly illustrate the technical solution, the accompanying drawings used in the embodiments will be briefly introduced below. 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.

[0024] Figure 1 This is a schematic diagram of the pipeline structure of the present invention.

[0025] In the diagram: 100: Superheated water tank, 200: Solution reaction device, 300: Sodium methoxide conversion unit, 400: High-temperature water storage tank, 500: High-temperature magnetic levitation heat pump unit, 510: High-temperature evaporator, 520: High-temperature condenser, 530: First pump group, 540: Second pump group, 600: Low-temperature magnetic levitation heat pump unit, 610: Low-temperature evaporator, 620: Low-temperature condenser, 630: Third pump group, 640: Fourth pump group, 650: Fifth pump group, 700: Evaporative cooling unit, 710: Gas-liquid separator, 720: Vacuum pump, 730: Cold water tank, 800: Normal temperature water storage tank. Detailed Implementation

[0026] In order to clearly and completely understand the technical solution, the present invention will be further described in conjunction with the embodiments and accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0028] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0029] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0030] Embodiments of the present invention provide a sodium methoxide conversion heat recovery control system based on digital twin technology heat pump, such as... Figure 1As shown, the system includes a superheated water tank 100, a solution reaction device 200, and a sodium methoxide conversion unit 300. The superheated water tank 100 is equipped with a hot water pipeline 110, through which hot water flows sequentially through the solution reaction device 200 and the sodium methoxide conversion unit 300 before entering a high-temperature water storage tank 400. The system also includes:

[0031] The high-temperature magnetic levitation heat pump unit 500 has a high-temperature evaporator 510 and a high-temperature condenser 520. The high-temperature evaporator 510 and the high-temperature water storage tank 400 form a first circulation pipeline, and the high-temperature condenser 520 and the superheated water tank 100 form a second circulation pipeline.

[0032] The digital twin model is constructed based on the configuration of the heat recovery control system. The model is initialized and given initial operating parameters and performance indicators to initially simulate the system's operating state. During operation, real-time data is acquired and the digital twin model is updated. Based on the currently input real-time data, the operating state of the heat recovery control system is simulated in real time.

[0033] In this embodiment, a first pump group 530 is provided between the high-temperature evaporator 610 and the high-temperature condenser 520, so that the hot water in the first circulation pipeline is circulated through the first pump group 530. A second pump group 540 is provided between the high-temperature condenser 520 and the superheated water tank 100, so that the hot water in the second circulation pipeline is circulated through the first pump group 540. The superheated water tank and the high-temperature water storage tank are respectively provided with water supply pipes.

[0034] With the above structure, the hot water pipeline of the superheated water tank supplies water to the solution reaction device to provide heat for the reaction. The hot water temperature from the superheated water tank is 120°C. After being heated by the solution reaction device, the hot water absorbs heat and its temperature drops to 85°C. Subsequently, the hot water pipeline flows to the sodium methoxide conversion unit. In this embodiment, there are multiple sodium methoxide conversion units. The hot water pipeline can supply heat to multiple sodium methoxide conversion units simultaneously, or it can supply liquid to a single sodium methoxide conversion unit. This can be achieved by setting a switch valve body for each sodium methoxide conversion unit. After the 85°C hot water enters the sodium methoxide conversion unit, it absorbs heat and its temperature drops to 76°C. The 76°C hot water flows to the high-temperature water storage tank, which is also equipped with a circulation pipeline connected to the outside.

[0035] It should be noted that the present invention does not impose any restrictions on the structure and operation of the solution reaction device and the sodium methoxide conversion unit. It is implemented using existing technology. In this embodiment, the hot water pipeline or other water pipeline enters the solution reaction device and the sodium methoxide conversion unit to provide heat energy.

[0036] In this invention, the real-time temperature of hot water in the hot water pipeline is obtained through a digital twin model. The real-time temperature is obtained by temperature sensors installed in the hot water pipeline, unit, or other corresponding locations. At the same time, other sensing elements can also be set at the corresponding locations of each component to obtain corresponding real-time data, such as flow rate and pressure. Technicians can set these according to actual usage needs. This invention does not impose any restrictions on the implementation method of obtaining sensing information or real-time data at the corresponding locations.

[0037] It should be noted that a digital twin model can digitally model the physical entity of a heat recovery control system, presenting the system's equipment structure, operating principles, thermodynamic characteristics, and other elements in the form of a digital model. This model can be continuously calibrated and optimized based on real-time monitoring data, accurately reflecting the system's true state and providing a reliable basis for prediction. Machine learning, artificial intelligence, and other algorithms can be used, combined with real-time monitoring data and historical data, to predict the system's future operating state. This invention does not limit the principles of building and designing the digital twin model; technicians can set it themselves according to actual usage needs, as long as existing technologies can be used to build the digital twin model of this embodiment according to the configuration of the heat recovery control system and achieve simulated real-time operation.

[0038] In this embodiment, the first real-time temperature T1 of the hot water pipeline at the inlet of the solution reaction device is obtained through the digital twin model and updated according to the real-time temperature. The updated digital twin model performs real-time simulation based on the current input real-time temperature and compares the deviation between the first real-time temperature T1 and the first operating temperature Q1 of the digital twin model before the update. The operating temperature refers to the simulated operating temperature in the digital twin model corresponding to the current real-time temperature acquisition position. It is determined whether the deviation exceeds the set threshold K1.

[0039] When the first real-time temperature T1 is lower than the first operating temperature Q1 of the digital twin model before the update, it is determined that Q1-T1 > K1. If it is greater, an instruction to adjust the heat release work of the high-temperature condenser is output to raise the water temperature of the superheated water tank. In this embodiment, adjusting the heat release work of the high-temperature condenser can be achieved by adjusting the work of the magnetic levitation heat pump unit or by increasing the heat absorption efficiency of the high-temperature evaporator. There are no restrictions on this, as long as the heat release efficiency of the high-temperature condenser is increased, thereby raising the water temperature of the superheated water tank.

[0040] Furthermore, the high-temperature evaporator 510 and the high-temperature water storage tank 400 form a first circulation pipeline. The 83°C hot water in the first circulation pipeline is drawn from the high-temperature water storage tank to the high-temperature evaporator by the first pump set 530 and absorbs heat. After the hot water temperature drops to 78°C, it flows back to the high-temperature water storage tank. The heat absorbed by the high-temperature evaporator, combined with the work done by the magnetic levitation heat pump unit, transfers energy to the high-temperature condenser and releases heat. The hot water coming out of the superheated water tank is drawn by the second pump set and passed into the high-temperature condenser to absorb heat. After the hot water temperature rises to 123°C, it flows back to the superheated water tank, raising the hot water temperature in the superheated water tank.

[0041] Those skilled in the art will understand that the high-temperature / low-temperature magnetic levitation heat pump unit of the present invention generally consists of a magnetic levitation centrifugal compressor, an evaporator, a condenser, a throttling device, and a control system. The operating principle is to compress the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas through the compressor, condense and release heat in the condenser, and then reduce the pressure through the throttling device, and absorb heat and evaporate in the evaporator to achieve heat transfer. The present invention will not be described in detail here.

[0042] In this invention, when the digital twin model predicts that the heat recovery control system may experience abnormalities or deviate from its optimal operating state, the prediction results are fed back and adjustment commands are issued in advance to automatically adjust the operating parameters of the magnetic levitation heat pump unit or the working status of the system equipment. For example, if it is predicted that the water temperature in the superheated water tank will soon fall below the 120°C temperature requirement of the solution reaction device, resulting in insufficient heating of the solution reaction device, or that the magnetic levitation heat pump unit is overloaded, the compressor speed and hot water flow rate can be adjusted in advance to ensure that the system can efficiently cope with flow rate changes and maintain stable heat recovery efficiency.

[0043] In an optional embodiment, the heat recovery control system further includes a low-temperature magnetic levitation heat pump unit 600, which has a low-temperature evaporator 610 and a low-temperature condenser 620. The hot water pipeline enters the low-temperature condenser to absorb heat after passing through the sodium methoxide conversion unit 300. A third pump group 630 is provided between the sodium methoxide conversion unit and the low-temperature condenser. The energy absorbed comes from the heat exchange of the low-temperature evaporator and / or the work done by the low-temperature magnetic levitation heat pump unit. After absorbing heat and rising in temperature, the water flows to the high-temperature water storage tank.

[0044] The high-temperature water storage tank is equipped with a water outlet pipe, which, together with the hot water pipe, enters the sodium methoxide conversion unit after passing through the solution reaction device.

[0045] With the above structure, 85°C hot water enters the sodium methoxide conversion unit and absorbs heat, causing the hot water temperature to drop to 76°C. The 76°C hot water first flows into the low-temperature condenser to absorb heat, and then rises to 85°C before entering the high-temperature water storage tank. The outlet pipe of the high-temperature water storage tank mixes the 85°C hot water with the hot water pipe before entering the sodium methoxide conversion unit.

[0046] The digital twin model acquires the second real-time temperature T2 at the outlet of the hot water pipeline in the solution reaction device and updates it according to the real-time temperature. The updated digital twin model performs real-time simulation based on the current input real-time temperature and compares the deviation between the second real-time temperature T2 and the second operating temperature Q2 of the digital twin model before the update to determine whether the deviation exceeds the set threshold K2.

[0047] When the second real-time temperature T2 is lower than the second operating temperature Q2 of the digital twin model before the update, it is determined that Q2-T2>K2. If it is greater, an instruction to adjust the water supply from the hot water pipeline to the sodium methoxide converter is output, and an instruction to control the water supply from the outlet pipeline is also output, so that the water temperature after mixing in the outlet pipeline and the hot water pipeline reaches the temperature requirement of the sodium methoxide converter.

[0048] In an optional embodiment, the sodium methoxide conversion unit 300 has a methanol vapor output pipeline, which is sequentially connected to an evaporative cooling unit 700, a gas-liquid separator 710, a vacuum pump 720, and a cold water tank 730. In this embodiment, high-temperature methanol vapor (gaseous, typically above its boiling point of 64.7°C, with pressure possibly at atmospheric or low pressure depending on system design) is cooled by the evaporative cooling unit through spray cooling water or air convection, allowing the methanol vapor to exchange heat with the cooling medium, releasing latent heat. The methanol vapor condenses into a liquid (liquid phase), possibly carrying a small amount of uncondensed gaseous methanol (forming a gas-liquid mixture), and enters the gas-liquid separator. Using gravity, centrifugal force, or packing separation principles, the liquid methanol is separated from the gaseous methanol. The liquid methanol (high purity) settles due to its higher density and is discharged from the bottom of the separator, while the uncondensed methanol vapor (containing trace amounts of impurities or low-boiling-point components) is discharged from the top and enters the subsequent vacuum pump. The vacuum pump extracts uncondensed methanol vapor from the gas-liquid separator and transports it to the cold water tank for condensation and recovery.

[0049] Furthermore, the low-temperature evaporator 610, the evaporative cooling unit 700, and the ambient temperature water storage tank 800 constitute a third circulation pipeline. A height difference is established between the ambient temperature water storage tank 800 and the low-temperature evaporator 610 so that the water flowing out of the low-temperature evaporator 610 naturally flows to the conventional water storage tank 800 under gravity. A fourth pump group 640 is provided between the evaporative cooling unit 700 and the low-temperature evaporator 610, and a fifth pump group 650 is provided between the conventional water storage tank 800 and the evaporative cooling unit 700. The water in the third circulation pipeline absorbs heat and rises to 37°C in the evaporative cooling unit before entering the low-temperature evaporator, where it absorbs heat again. After the water temperature drops to 28°C, it flows to the ambient temperature water storage tank.

[0050] In an optional embodiment, the digital twin model obtains the third real-time temperature T3 of the high-temperature water storage tank and updates it according to the real-time temperature. The updated digital twin model performs real-time simulation based on the current input real-time temperature and compares the deviation between the third real-time temperature T3 and the third operating temperature Q3 of the digital twin model before the update to determine whether the deviation exceeds the set threshold K3.

[0051] When the third real-time temperature T3 is lower than the third operating temperature Q3 of the digital twin model before the update, it is determined that Q3-T3>K3. If it is greater, an instruction to adjust the heat release work of the low-temperature condenser is output to raise the water temperature of the high-temperature water storage tank.

[0052] In an optional embodiment, the digital twin model obtains the fourth real-time temperature T4 of the methanol vapor output pipeline and updates it according to the real-time temperature. The updated digital twin model performs real-time simulation based on the current input real-time temperature and compares the deviation between the fourth real-time temperature T4 and the fourth operating temperature Q4 of the digital twin model before the update to determine whether the deviation exceeds the set threshold K4.

[0053] When the fourth real-time temperature T4 is lower than the fourth operating temperature Q4 of the digital twin model before the update, it is determined that Q4-T4>K4. If it is greater, the fan of the evaporative cooling unit is adjusted to start so that the excessive heat in the methanol vapor output pipeline can be dissipated.

[0054] In an optional embodiment, the digital twin model acquires and updates the operating information of the evaporative chiller. When the heat in the methanol vapor output pipeline is too high, the fan of the evaporative chiller starts to increase heat dissipation and outputs a command to control the flow rate of the third circulation pipeline to improve the heat exchange efficiency of the third circulation pipeline.

[0055] The above disclosures are merely one or more preferred embodiments of the present invention, intended to help understand the inventive concept of the technical solution, and are not intended to limit the present invention in any other way. Any other equivalent or conventional substitution schemes made by those skilled in the art based on the features defined by the present invention shall still fall within the scope of the present invention.

Claims

1. A methoxide-sodium conversion heat recovery control system based on digital twin technology heat pump, characterized in that, The system includes a superheated water tank, a solution reaction apparatus, and a sodium methoxide conversion unit. The superheated water tank is equipped with a hot water pipeline, through which hot water flows sequentially through the solution reaction apparatus and the sodium methoxide conversion unit before entering a high-temperature water storage tank. It also includes: The high-temperature magnetic levitation heat pump unit has a high-temperature evaporator and a high-temperature condenser. The high-temperature evaporator and the high-temperature water storage tank form a first circulation pipeline, and the high-temperature condenser and the superheated water tank form a second circulation pipeline. The digital twin model is constructed based on the configuration of the heat recovery control system. The model is initialized and given initial operating parameters and performance indicators to initially simulate the system's operating state. During the operation, real-time data is acquired and the digital twin model is updated. Based on the currently input real-time data, the operating state of the heat recovery control system is simulated in real time. The low-temperature magnetic levitation heat pump unit has a low-temperature evaporator and a low-temperature condenser. The hot water pipeline enters the low-temperature condenser after passing through the sodium methoxide conversion unit to absorb heat. The energy absorbed comes from the heat exchange of the low-temperature evaporator and / or the work done by the low-temperature magnetic levitation heat pump unit. After absorbing heat and rising in temperature, the water flows to the high-temperature water storage tank.

2. The sodium methoxide conversion heat recovery control system based on digital twin technology heat pump according to claim 1, characterized in that: The high-temperature water storage tank is equipped with a water outlet pipe, which, together with the hot water pipe, enters the sodium methoxide conversion unit after passing through the solution reaction device.

3. The sodium methoxide conversion heat recovery control system based on digital twin technology heat pump according to claim 1, characterized in that: The sodium methoxide conversion unit has a methanol vapor output pipeline, which is connected in sequence to an evaporative chiller, a gas-liquid separator, a vacuum pump, and a cold water tank.

4. The sodium methoxide conversion heat recovery control system based on digital twin technology heat pump according to claim 3, characterized in that: The low-temperature evaporator, the evaporative cooling unit, and the ambient temperature water tank form a third circulation pipeline. The ambient temperature water tank and the low-temperature evaporator are positioned with a height difference so that the water flowing out of the low-temperature evaporator flows naturally to the conventional water tank under the action of gravity. A pump set is provided between the conventional water tank and the evaporative cooling unit, and between the evaporative cooling unit and the low-temperature evaporator.

5. A sodium methoxide conversion heat recovery control system based on digital twin technology heat pump according to claim 1, characterized in that: The digital twin model acquires the first real-time temperature T1 at the inlet of the hot water pipeline in the solution reaction device and updates it according to the real-time temperature. The updated digital twin model performs real-time simulation based on the current input real-time temperature and compares the deviation between the first real-time temperature T1 and the first operating temperature Q1 of the digital twin model before the update. The operating temperature refers to the simulated operating temperature in the digital twin model corresponding to the current real-time temperature acquisition position. It is determined whether the deviation exceeds the set threshold K1. When the first real-time temperature T1 is lower than the first operating temperature Q1 of the digital twin model before the update, it is determined that Q1-T1>K1. If it is greater, an instruction to adjust the heat release work of the high-temperature condenser is output to raise the water temperature of the superheated water tank.

6. A sodium methoxide conversion heat recovery control system based on digital twin technology heat pump according to claim 5, characterized in that: The digital twin model acquires the second real-time temperature T2 at the outlet of the hot water pipeline in the solution reaction device and updates it according to the real-time temperature. The updated digital twin model performs real-time simulation based on the current input real-time temperature and compares the deviation between the second real-time temperature T2 and the second operating temperature Q2 of the digital twin model before the update to determine whether the deviation exceeds the set threshold K2. When the second real-time temperature T2 is lower than the second operating temperature Q2 of the digital twin model before the update, it is determined that Q2-T2>K2. If it is greater, an instruction to adjust the water supply from the hot water pipeline to the sodium methoxide converter is output, and an instruction to control the water supply from the outlet pipeline is also output, so that the water temperature after mixing in the outlet pipeline and the hot water pipeline reaches the temperature requirement of the sodium methoxide converter.

7. A sodium methoxide conversion heat recovery control system based on digital twin technology heat pump according to claim 5, characterized in that: The digital twin model obtains the third real-time temperature T3 of the high-temperature water storage tank and updates it according to the real-time temperature. The updated digital twin model performs real-time simulation based on the current input real-time temperature and compares the deviation between the third real-time temperature T3 and the third operating temperature Q3 of the digital twin model before the update to determine whether the deviation exceeds the set threshold K3. When the third real-time temperature T3 is lower than the third operating temperature Q3 of the digital twin model before the update, it is determined that Q3-T3>K3. If it is greater, an instruction to adjust the heat release work of the low-temperature condenser is output to raise the water temperature of the high-temperature water storage tank.

8. A sodium methoxide conversion heat recovery control system based on digital twin technology heat pump according to claim 5, characterized in that: The digital twin model obtains the fourth real-time temperature T4 of the methanol vapor output pipeline and updates it according to the real-time temperature. The updated digital twin model performs real-time simulation based on the current input real-time temperature and compares the deviation between the fourth real-time temperature T4 and the fourth operating temperature Q4 of the digital twin model before the update to determine whether the deviation exceeds the set threshold K4. When the fourth real-time temperature T4 is lower than the fourth operating temperature Q4 of the digital twin model before the update, it is determined that Q4-T4>K4. If it is greater, the fan of the evaporative cooling unit is adjusted to start so that the excessive heat in the methanol vapor output pipeline can be dissipated.

9. A sodium methoxide conversion heat recovery control system based on digital twin technology heat pump according to claim 8, characterized in that: The digital twin model acquires and updates the operating information of the evaporative chiller. When the heat in the methanol vapor output pipeline is too high, the fan of the evaporative chiller starts to increase heat dissipation and outputs a command to control the flow rate of the third circulation pipeline to improve the heat exchange efficiency of the third circulation pipeline.

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