A dynamic evaluation device and method for a fully automatic converter valve cooling system

Abstract

This invention discloses a dynamic evaluation device and method for a fully automatic converter valve cooling system, relating to the technical field of ultra-high voltage DC valve cooling systems in the power industry. It includes: a mechanical ventilation tower unit for energy exchange with water samples; a tower pool unit for carrying and managing intermediate water samples; a purified fresh air unit for identifying and separating external interference factors to purify the air entering the mechanical ventilation tower; a flow calculation unit for real-time monitoring of water sample flow changes and analyzing the flow data; and a raw water control unit for inputting water samples, performing parameter analysis on the added water samples, and adjusting and controlling the water samples based on the analysis results and simulation requirements. This invention can simulate the actual on-site operating state of the external cooling water system of an ultra-high voltage converter station and accurately and comprehensively predict and evaluate phenomena such as corrosion and scaling, providing technical support for the safe and stable operation of the converter valve.

Description

Technical Field

[0001] This invention relates to the field of ultra-high voltage DC valve cooling system technology in the power industry, and in particular to a dynamic evaluation device and method for a fully automatic converter valve cooling system. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] With the rapid development of ultra-high voltage technology, the reliability of many power electronic components has become a key condition for system development. The flexible application of artificial intelligence knowledge also puts forward better requirements for traditional technologies. The sensitivity of sensors, the efficiency of thermal components, the intervention of technical forces, and the controllable prediction of future development trends have become major problems that urgently need to be solved in this era.

[0004] During converter station operation, energy is consumed, and this lost energy is converted into heat, causing the temperature of converter valve components to rise. Appropriate cooling methods and effective cooling media are needed to remove this heat and ensure the safe and stable operation of the converter valves. Water has a high specific heat capacity, excellent heat dissipation performance, and low viscosity, allowing it to pass through small and complex interfaces. Water is chemically stable, non-flammable, and inexpensive, offering many advantages over air. Therefore, water is a good choice for heat exchange. However, as a naturally occurring substance, water is greatly affected by the natural environment. Air quality, human environment, geographical features, and habitat all significantly impact water quality. The converter station valve cooling system mainly borrows the closed-loop cooling principle of generator sets, achieving tiered isolation of water quality. While they share commonalities in terms of water source, they differ fundamentally in terms of water quality improvement. As the primary cooling water system that comes into contact with the power electronic heat exchange elements, the internal cooling water system has high requirements for water quality in terms of turbidity, conductivity, dissolved oxygen, and other indicators. The system also has a separate and unique water treatment device to purify the water. To prevent the influence of the external environment, the system adopts a completely closed cooling system. The heat generated by the system will achieve imperceptible contact with the external cooling water system, thus only exchanging heat parameters.

[0005] However, the external cooling water system, referencing the petrochemical and generator cooling tower fields, uses spray cooling to ultimately achieve heat output via forced fans. While this design considers the advantages and disadvantages of water itself, the influence of external factors on water quality remains. The converter station undergoes routine maintenance annually, but due to comprehensive considerations of the large power grid and the practical promotion of lean maintenance, high demands are placed on personnel skills and project progress during maintenance. Improving maintenance quality has become a major challenge for operation and maintenance personnel. During maintenance, problems such as reduced water treatment capacity due to reverse osmosis fouling and corrosion and deposition of cooling grids and coolers caused by sludge in the cooling tower pool can only be addressed during the annual maintenance period. Furthermore, the occurrence of these problems is unpredictable, and maintenance plans may lack a basis. Based on this situation, simulation technology for fully automatic converter valve cooling systems has received considerable attention due to its ability to simulate system operation at low cost, providing a basis for maintenance work.

[0006] Currently, there are still some unresolved issues in the simulation research of fully automatic converter valve cooling systems. Most existing simulation devices rely on purely mathematical models, which often overlook the complex physicochemical processes involved in actual operation, leading to significant discrepancies between simulation results and reality. Furthermore, the simulation scope of some devices is limited, failing to comprehensively cover the operating conditions of the converter valve cooling system under different operating conditions. For example, existing simulation devices struggle to accurately predict common and critical phenomena such as scaling and corrosion, making it impossible to take effective preventative measures in practice, thus increasing the risk of equipment operation and maintenance costs. Therefore, there is an urgent need to develop a more comprehensive and accurate simulation device to improve the reliability and stability of converter valve cooling systems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the purpose of this invention is to provide a dynamic evaluation device and method for a fully automatic converter valve cooling system. This device considers the dynamic changes in the system from full load to low load, and can simulate the actual on-site operating conditions of the external cooling water system of an ultra-high voltage converter station. It also provides accurate and comprehensive prediction and evaluation of phenomena such as corrosion and scaling, thus providing technical support for the safe and stable operation of the converter valve.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solution: The first aspect of this invention provides a dynamic evaluation device for a fully automatic converter valve cooling system, comprising: Mechanical ventilation tower unit, used for energy exchange of water samples; The tower pool unit is used to hold and manage intermediate water samples through the tower pool; The fresh air purification unit is used to purify the air entering the mechanical ventilation tower by identifying and separating external interference factors; The flow calculation unit is used to monitor the flow rate changes of water samples in real time and analyze the flow rate data. The raw water control unit is used to input water samples, perform parameter analysis on the added water samples, and adjust and control the water samples according to the analysis results and simulation requirements.

[0009] Furthermore, it also includes a heating unit for staged heating of the water sample, including a primary heating unit and a secondary heating unit connected in series.

[0010] Furthermore, it also includes a forced ventilation unit, which uses mechanical force to forcibly control airflow, thereby achieving ventilation.

[0011] Furthermore, the raw water control unit includes a control and regulation unit, a liquid replenishment unit, a drive unit, and a chemical dosing unit. The control and regulation unit is used to analyze and control the water sample parameters, the liquid replenishment unit is used to replenish water and add chemicals, the drive unit is used to drive the added water sample into the circulation of the device, and the chemical dosing unit is used to add stabilizers as needed and add weak acids as needed according to the alkalinity of the water.

[0012] Furthermore, the drive unit includes a first water sample drive pump, a water sample filter, and a raw water sample tank. After the water sample is added to the raw water sample tank for storage, it is filtered by the water sample filter and then enters the raw water control unit through the drive action of the first water sample drive pump. The raw water control unit controls and adjusts the water sample according to the simulation requirements, and then inputs the water sample into the circulating water circuit.

[0013] Furthermore, it also includes a sewage purification unit for regularly purifying the tower pool and raw water control unit.

[0014] Furthermore, it also includes a sampling unit for sampling and testing, including a manual sampling gate and an automatic sampling gate.

[0015] Furthermore, the raw water control unit drives the water sample to the tower pool for water sample circulation and transportation. The circulation path includes a tower pool unit, a mechanical ventilation tower unit, a heating unit, and a flow calculation unit connected in series. The other end of the flow calculation unit is connected to the tower pool unit.

[0016] Furthermore, the fresh air purification unit includes a polarization unit and a purification unit. The polarization unit ionizes external interference factors and assigns positive or negative charges according to the different properties of particulate matter. The purification unit identifies and separates external interference factors with charges through the action of a magnetic field.

[0017] A second aspect of the present invention provides a dynamic evaluation method for the dynamic evaluation device of the fully automatic converter valve cooling system described in the first aspect, comprising the following steps: The raw water control unit is used to filter and adjust the parameters of the added water sample; The adjusted water sample is input into the tower pool, and the circulation simulation of the fully automatic converter valve cooling system is carried out with the tower pool as the source. The water sample in the circulation process is heated and energy exchanged according to the simulation requirements; Real-time monitoring of water sample parameters is used to evaluate the status of the fully automatic converter valve cooling system.

[0018] The above one or more technical solutions have the following beneficial effects: This invention discloses a dynamic evaluation device and method for a fully automatic converter valve cooling system. By establishing a cyclic simulation architecture for the fully automatic converter valve cooling system, dynamic simulation tests are conducted on the operation of specific makeup water and chemicals. This enables a comprehensive evaluation of the operation technology of the UHVDC valve cooling system, allowing for early prediction of system corrosion and scaling. The invention achieves a scaled-down version of the operating status and component settings. Based on the original equipment, the fresh air system, liquid replenishment unit, and sewage system have been upgraded and modified. By combining system design, water source, converter valve operation mode and output, water treatment device efficiency, air quality, maintenance personnel strength, stability of the chemical dosing unit, and troubleshooting difficulties, a comprehensive dynamic simulation evaluation is achieved. Technicians can explore basic parameters based on the evaluation indicators and propose precise operation control for subsequent thermal equipment. In the future, this technology will be organically integrated with digital converter stations, applying intelligent operation and maintenance to actual safe production.

[0019] The instrument designed in this invention can perform linear calibration periodically, thereby ensuring the accuracy of the instrument itself. At the same time, the test results are kept as consistent as possible with the actual operating effect. It can also serve as a basis for the operation of valve cooling equipment in the later stage. The dynamic evaluation method of this invention is simple and effective, which greatly improves the safety and stability of thermal equipment, thereby further improving the operation and corresponding supervision level of DC system, and laying a theoretical foundation for the later improvement of ultra-high voltage technology.

[0020] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1This is a framework diagram of the dynamic evaluation device for the fully automatic converter valve cooling system in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the purification and fresh air unit in Embodiment 1 of the present invention; The components include: 1. Flow calculation unit; 2. Primary heating unit; 3. Secondary heating unit; 4. Flow valve; 5. Mechanical ventilation tower; 6. Purified fresh air unit; 6-1. Polarization unit; 6-2. Purification unit; 7. Forced ventilation unit; 8. Liquid replenishment unit; 9. First water sample drive pump; 10. Water sample filter; 11. Raw water sample tank; 12. Control and adjustment unit; 13. Chemical dosing unit; 14. Raw water sewage discharge and cleaning unit; 15. Conductivity meter; 16. pH meter; 17. Temperature controller; 18. Manual sampling door; 19. Automatic sewage discharge door; 20. Automatic sampling door; 21. First tower pool purification unit; 22. Second tower pool purification unit; 23. Tower pool; 24. Tower pool outlet valve; 25. Second water sample drive pump. Detailed Implementation

[0023] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] Example 1: Embodiment 1 of this invention provides a dynamic evaluation device for a fully automatic converter valve cooling system. Centered on the tower pool, it achieves comprehensive water sample flow, maximally mimicking the actual operating conditions of the fully automatic converter valve cooling system in the field. This allows for advance prediction of the corrosion and scaling status of the valve cooling system through signal sensing, and enables comprehensive evaluation of the operating process and reagent usage in advance. For example... Figure 1 As shown, it includes: Mechanical ventilation tower unit, used for energy exchange of water samples.

[0026] In one specific implementation, the mechanical ventilation tower unit includes a mechanical ventilation tower 5. As the core component of the evaluation device, the mechanical ventilation tower 5 maximizes the replication of the external cooling system, and its internal structure can comprehensively realize energy exchange. Specifically, the high-temperature water sample arrives at the mechanical ventilation tower after passing through the heating unit. The heat from the heating unit can be exchanged here, transferring heat from water to air. The purified air from the fresh air purification unit rises together with the steam generated in the water, and finally, the heat is carried away and discharged outside the tower by the forced ventilation unit 7. During this process, the evaporation of water inevitably causes the circulating water to concentrate, and the concentrated circulating water will move downwards due to gravity. The mechanical ventilation tower also undertakes the function of water purification. Through internal filtration and biological treatment processes, it effectively removes impurities and harmful substances from the water sample, further improving the purity and quality of the water sample.

[0027] To maximize the contact area, the mechanical ventilation tower is equipped with a polygonal packing structure. This allows the falling water droplets to be cut to the maximum extent, effectively turning large water droplets into smaller ones. This not only increases the contact area between the water droplets and the packing, but also improves the residence time and mixing efficiency of the water droplets inside the tower.

[0028] Existing simulation devices only use fans to control air volume, but cannot reduce water temperature. Therefore, they cannot fully simulate the working environment of external cooling valves. In this embodiment, the entire dynamic evaluation device provides sufficient airflow to the mechanical ventilation tower 5 through the purification fresh air unit, which accelerates heat loss and moisture evaporation, thereby achieving efficient and comprehensive energy exchange.

[0029] The tower pool unit is used to carry and schedule intermediate water samples. The tower pool unit includes a tower pool, parameter sensors, conductivity meter 15, pH meter 16, temperature controller 17, tower pool outlet valve 24, and a second water sample drive pump 25.

[0030] In this embodiment, the parameter sensors are mainly divided into two categories: thermal and chemical parameters. They primarily monitor parameters such as temperature, flow rate, pressure, conductivity, pH, acidity / alkalinity, and the content of other ions in the device in real time. The sensors transmit water signals to secondary instruments, which then perform comprehensive calculations to generate computer language that is ultimately transmitted to the control and regulation unit of the dynamic evaluation device. This signal becomes the source signal for commands issued by the DCS system, such as fan operation, pump start / stop, and even water shortage protection. The conductivity meter 15 and pH meter 16 are used to display real-time conductivity and pH, respectively.

[0031] Tower pool 23 is the core component of the dynamic evaluation device, playing a pivotal role in the entire system. Located below the mechanical ventilation tower, this pool receives low-temperature water samples flowing from the tower. It serves as a collection system for the circulating water cooling end samples and is also the source for the next stage of circulating water. Water samples flow from the pool through outlet valve 24 and are then pumped by the second water sample drive pump 25 into the flow calculation unit 1 and heating unit. The replenishment unit adds water to the pool to balance the total salinity of the water. When the salinity is too high, the pool purification unit automatically activates. Conductivity meters, pH meters, and temperature sensors are also located within the pool to record and transmit various parameters of the cooling water.

[0032] The conductivity meter 15, pH meter 16, and temperature controller 17 are the display and control components for the water parameters of the evaluation device. When the conductivity index shows a significant upward trend during the test, purification can be achieved by opening the automatic drain door 19. The discharged wastewater can be reused by passing through the first tower purification unit 21 or the second tower purification unit. When the pH index of the water sample changes during the test, comprehensive control can be achieved by adjusting the amount of acid added. The temperature controller 17 provides parameters for the water sample temperature of the evaluation device, ultimately achieving comprehensive temperature stability.

[0033] The purified fresh air unit 6 is used to purify the air entering the mechanical ventilation tower by identifying and separating external interference factors. The purified fresh air unit 6 is installed on the mechanical ventilation tower 5. Figure 2 As shown, the fresh air purification unit includes a polarization unit 6-1 and a purification unit 6-2. The polarization unit 6-1 ionizes external interference factors and assigns positive or negative charges according to the different properties of particulate matter. The purification unit 6-2 identifies and separates external interference factors with charges through the action of a magnetic field, ensuring that the air entering the mechanical ventilation tower is clean and fresh [1][A2][3]. The fresh air purification unit is also equipped with corresponding sound absorption and noise reduction devices, which reduce the noise level to below 85dB and reduce environmental pollution.

[0034] In this embodiment, the purified fresh air unit 6 is a core component of the dynamic evaluation device. It can simulate different seasons of the external natural environment and purify the incoming air through the action of a magnetic field. It can effectively isolate external interference factors, especially particulate matter mixed in the air. Specifically, a magnetic stirring system is added to the path of the air, allowing the components of the air to be charged. The entire charging process is completed during the journey. The next step is to use the positive and negative electromagnetic interaction to achieve the directional ionization of the air components, especially the internal impurities. Positive charges will ionize to the negative pole, and negative charges will ionize to the positive pole. The air is basically purified before entering the mechanical ventilation tower. The air journey is the opposite of the spray water journey, so heat exchange is achieved during the contact process, thereby minimizing the interference of the external environment on the circulating water.

[0035] The flow calculation unit 1 is used to monitor the flow rate changes of the water sample in real time and analyze the flow data. One end of the flow calculation unit 1 is connected to the tower pool 23, and the other end is connected to the primary heating unit 2. The flow calculation unit 1 mainly performs flow calculation, further quantifying the water sample transmission. It achieves comprehensive flow control through optical sensing technology. This calculation is the indirect source of heat exchange; the flow rate determines the system's heat exchange capacity, ultimately promoting energy exchange within the mechanical ventilation tower. It can also provide accurate data on flow rate changes. The flow calculation unit 1 provides quantitative data support for the pump start-up and frequency changes in the system. Its integrated linkage mechanism with the water sample drive pump ensures the continuity and stability of the water sample during sampling, avoiding the impact of flow fluctuations on the test results. Simultaneously, it provides interlocking protection information for the dynamic evaluation device, especially information on water shortage protection. Specifically, when the flow rate of the circulating water circuit exceeds the upper limit, the flow calculation unit can provide power reduction information to the drive pump device; conversely, it provides power increase information. This flexible control method not only improves the accuracy and reliability of the experiment, but also provides strong data support for the comprehensive evaluation of subsequent operating processes and reagent use.

[0036] The flow calculation unit 1 includes a flow sensor and a flow valve 4. The high-precision flow sensor can monitor the flow rate changes of the water sample in real time, ensuring data accuracy. The application of optical sensing technology not only achieves non-contact flow measurement but also greatly improves the stability and reliability of the measurement. The flow valve 4 is installed on the pipelines connecting both ends of the flow calculation unit. A second water sample drive pump 25 is also connected to the pipeline connecting the flow calculation unit and the tower pool. The flow valve 4 can control the flow rate of the water sample driven from the tower pool 23 by the second water sample drive pump 25. The flow valve 4 is also installed on the pipeline connecting the primary heating unit and the secondary heating unit, enabling precise control of the flow rate from 0 to 300 ml / min. This allows for comprehensive matching before and after the device operation, ensuring that the expected water sample flow rate is met at different experimental stages. This valve is precisely designed and uses advanced flow control technology, enabling accurate adjustment over a wide flow range. This not only improves the flexibility and controllability of the experiment but also effectively ensures the accuracy and stability of the experimental results. Furthermore, it possesses excellent sealing performance and corrosion resistance, adapting to various complex water quality conditions and ensuring long-term stable operation of the experiment.

[0037] The raw water control unit is used to input water samples, perform parameter analysis on the added water samples, and adjust and control the water samples according to the analysis results and simulation requirements.

[0038] The raw water control unit includes a control and regulation unit, a replenishment unit, a drive unit, and a dosing unit. The control and regulation unit is used to analyze and control the water sample parameters. The replenishment unit is used to replenish water and add chemicals. The drive unit is used to drive the added water sample into the circulation of the device. The dosing unit is used to add stabilizers as needed and add weak acids as needed according to the alkalinity of the water.

[0039] The replenishment unit 8 primarily utilizes a replenishment pump to perform its replenishment function. It connects to the control and regulation unit 12 and the tower pool 23. A chemical dosing unit 13 is also installed on the pipeline connecting the replenishment unit 8 and the control and regulation unit 12. This essentially completes the water replenishment process for the entire system. The liquid replenished by the replenishment unit 8 contains not only water but also some chemicals. The addition of these chemicals needs to perfectly match the dosing schedule. Due to the corrosive nature of the chemicals, the system must consider corrosion prevention requirements. Unlike the chemical dosing unit, in the replenishment unit, water and chemicals are added simultaneously. The appropriate chemicals are mixed according to the initial requirements of the water sample. However, as the actual operation progresses, the demand for chemicals gradually changes. Therefore, the chemical dosing unit needs to replenish chemicals based on the operating conditions of the unit. The start-up and shutdown of the replenishment unit are coordinated with the evaluation device via DCS control. The replenishment unit 8 and the dosing unit 13 are integrated and linked. When the flow rate increases, the dosing unit will also increase its frequency. This coordination is a response to the dosing scheme. For example, if the dosing scheme is designed for 100 mg / L, and the replenishment unit is designed for 1000 ml / min, the dosing unit must be designed for 100 mg / min to achieve a good mixing ratio. In actual operation, the parameters of dosing, liquid level, and pump frequency need to be comprehensively coordinated to further achieve a balance between the evaporated water volume and the replenished water volume.

[0040] The control and regulation unit 12 is used to adjust and control the water quality parameters of the water sample entering the dynamic evaluation device (generally, tap water is used in converter stations) to ensure the stable operation of subsequent treatment processes. The control and regulation unit is the "first line of defense" in the dynamic evaluation device, and its stable operation directly affects the effectiveness of subsequent processes. The control and regulation unit needs to be comprehensively adjusted based on the existing experimental evaluation plan and the raw water quality, which must be obtained through laboratory testing. The control and regulation unit 12 is connected to the original sample tank 11, and the water sample in the original sample tank is driven to the control and regulation unit 12 by the first water sample drive pump.

[0041] The dosing unit 13 is an automated device for precise dosing of chemical agents. Its core function is to add stabilizers quantitatively as needed. In valve external cooling systems, the scale inhibitors and corrosion inhibitors generally added have certain special characteristics in their makeup water quality due to the special geographical location. If the alkalinity index of the water is too high, a weak acid needs to be added to inhibit scale formation. This system is the "chemical adjustment center" in the water treatment process. Its core value lies in the precise, stable, and automated dosing of agents. When selecting a system, the focus should be on agent compatibility, control accuracy, and system scalability. The operating status of the makeup water unit should also be considered during operation.

[0042] The drive unit includes a first water sample drive pump 9, a water sample filter 10, and a raw water sample tank 11. After the water sample is added to the raw water sample tank 11, it is stored. After being filtered by the water sample filter 10, it enters the control and adjustment unit 12 of the raw water control unit through the drive action of the first water sample drive pump 9. The raw water control unit performs water sample control and adjustment according to the simulation requirements, and then inputs the water sample into the circulating water circuit.

[0043] The first water sample drive pump 9 is the source of water replenishment. Its start-up mainly depends on the liquid level in the control and regulation unit 12. When the liquid level is lower than the design value, the sampling pump will start automatically. The water sample in the raw water sample tank reaches the control and regulation unit 12 through the water sample filter 10. The acidity and alkalinity of the water sample are adjusted in the control and regulation unit. The raw water sewage cleaning unit 14 can periodically clean the replenishment unit. Finally, the comprehensive utilization of wastewater resources is achieved through the water treatment system.

[0044] A water sample filter 10 is a device used to separate particulate matter, microorganisms, or other impurities from a water sample. Its core function is to purify the water sample through physical interception (sieving, adsorption, etc.) or chemical action (such as activated carbon adsorption) to meet experimental requirements. Its selection requires comprehensive consideration of factors such as filtration precision, sample properties, and analytical objectives. Correct use can significantly improve data accuracy and extend the device's lifespan.

[0045] The heating unit, used for staged heating of the water sample, includes a primary heating unit 2 and a secondary heating unit 3 connected in series. This heating unit is the power unit of the evaluation device, acting as the heat source in the entire evaluation method. It comprehensively simulates the heating units and internal cooling water system of the converter station, heating the test water sample during the experiment. This heating unit can mimic the heat rise state of the valve-cooled system under different seasons and different DC work capacities. The evaluation system software has a large database of data from different converter stations already in operation, recording this data. The heating unit selects different work modes according to different conditions. Simultaneously, to protect the evaluation device, this heating unit is also linked to the flow rate of the former.

[0046] The primary heating unit 2 and the secondary heating unit 3 are connected in series. The other end of the primary heating unit 2 is connected to the flow calculation unit 1, and the other end of the secondary heating unit is connected to the mechanical ventilation tower 5. To successfully simulate the efficiency of the valve-cooled system's working unit, a load heating loop is adopted to complete the water sample heating process under a constant flow rate. In actual operation, this is similar to the function of the converter valve itself. At the same time, the temperature can be comprehensively adjusted within a large range according to different seasons. To further simulate the on-site conditions and for comprehensive safety considerations, the primary heating unit 2 and the secondary heating unit 3 are also equipped with flow protection devices. When a system fault occurs, the unit will automatically cut off the power to reduce the threat to life and health caused by fire. The primary heating unit 2 and the secondary heating unit 3 are connected in series, simulating the controllability of both the sending and receiving ends of the converter station.

[0047] Forced ventilation unit 7 is used to forcefully control airflow using mechanical force, thereby achieving ventilation.

[0048] Forced ventilation unit 7 is the heat outlet of this dynamic evaluation device, connected to the mechanical ventilation tower 5. It is primarily designed for integrated use with the mechanical ventilation tower to ensure efficient operation of the entire system. Latent heat of vaporization is the main component of this heat. Heat from the exchange valve is removed by the forced ventilation unit through different transfer methods. The forced axial flow fan is the main carrier of forced ventilation unit 7. The forced axial flow fan receives temperature signals from the DCS system to further control its frequency. The operation of the forced axial flow fan needs to coordinate with the air intake to achieve a dynamic balance between the airflow pressure inside the mechanical ventilation tower and the external environment. The forced ventilation unit can be automatically activated, ensuring automation of the entire process. When the water sample temperature exceeds the designed high value, the fan in the system will automatically start, effectively removing more heat to maintain normal system operation. Conversely, when the water sample temperature falls below the designed low value, the fan will automatically stop, saving energy and avoiding unnecessary energy consumption.

[0049] The wastewater purification unit is used to periodically purify the tower pool and raw water control unit. The wastewater purification unit includes a first tower pool purification unit 21, a second tower pool purification unit 22, and a raw water wastewater cleaning unit 14.

[0050] The raw water discharge and cleaning unit 14 is a self-cleaning system for the dynamic evaluation device, connected to the control and adjustment unit 12. It mainly performs a full-process cleaning function for the replenishment unit. Specifically, it eliminates the differences in each evaluation, especially the interference of external factors on the experiment, and performs discharge and cleaning to reduce the contamination of the previous experiment on the next experiment. The raw water discharge and cleaning unit can be operated in two modes: periodic operation and manual operation. The wastewater generated during cleaning is purified by the water treatment system to achieve comprehensive utilization. The design of the raw water discharge and cleaning unit is mainly for the protection of downstream devices. At present, due to the scarcity of natural resources, the quality of water resources is not guaranteed. The installation of the shelf water treatment system is an important prerequisite for ensuring the stable operation of high-precision instruments.

[0051] The first and second tower pool purification units 21 and 22 are important components of the previous in-depth upgrade. They are the main components for cleaning and treatment in the dynamic evaluation device, and the purification devices are also the main source of wastewater discharge for the entire system. This achieves water treatment technology with the same efficiency as the generator set, enabling comprehensive resource utilization. To obtain more evaluation test data, technicians designed a corresponding sampling structure, namely an automatic discharge gate, which is used for both periodic and irregular sampling. The evaluation device uses 24 hours as the overall "1" in the pie chart, and samples are taken quantitatively over specific time periods. To prevent interference from the external environment, the system adopts appropriate isolation measures. Volume and time parameters are recorded in the system's DCS system. Technicians regularly analyze and test the water samples, ultimately providing data support for the evaluation tests. The first tower pool purification unit 21 is connected to the tower pool 23 via the automatic discharge gate 19, through which wastewater in the tower pool is discharged for sampling. The second tower pool purification unit 22 is connected to the tower pool 23 via both manual and automatic sampling gates. The pipelines containing the manual and automatic sampling gates are connected in parallel, ensuring that the two sampling methods are independent.

[0052] The sampling unit, used for sampling and testing, includes a manual sampling gate and an automatic sampling gate. Both the manual sampling gate 18 and the automatic sampling gate 20 can perform sampling functions. Technicians can use constant analysis of water samples to test and control conductivity, pH, hardness, calcium ions, magnesium ions, and aluminum ions, providing theoretical data support for evaluating the corrosion and scaling of the system.

[0053] The raw water control unit drives the water sample to the tower pool for water sample circulation and transportation. The circulation path includes a tower pool unit, a mechanical ventilation tower unit, a heating unit, and a flow calculation unit connected in series. The other end of the flow calculation unit is connected to the tower pool unit.

[0054] In this embodiment, the pipeline and related drive device form the framework of the dynamic evaluation device. It connects equipment such as the tower pool, mechanical ventilation tower, and heating unit. The drive device enables the water sample to flow comprehensively and is also the main control force for flow rate changes. The pipeline and drive unit of this device are all designed to be corrosion-resistant products, and the system is relatively closed. Its stability plays a crucial role in the accuracy of the test.

[0055] Example 2: Embodiment 2 of the present invention provides a dynamic evaluation method for the dynamic evaluation device of the fully automatic converter valve cooling system described in Embodiment 1, comprising the following steps: The raw water control unit is used to filter and adjust the parameters of the added water sample; The adjusted water sample is input into the tower pool, and the circulation simulation of the fully automatic converter valve cooling system is carried out with the tower pool as the source. The water sample in the circulation process is heated and energy exchanged according to the simulation requirements; Real-time monitoring of water sample parameters is used to evaluate the status of the fully automatic converter valve cooling system.

[0056] The steps involved in the above embodiment two correspond to those in embodiment one. For specific implementation details, please refer to the relevant description section of embodiment one.

[0057] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed in this application can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application. The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A dynamic evaluation device for a fully automatic cooling system of a converter valve, characterized in that include: Mechanical ventilation tower unit, used for energy exchange of water samples; The tower pool unit is used to hold and manage intermediate water samples through the tower pool; The fresh air purification unit is used to purify the air entering the mechanical ventilation tower by identifying and separating external interference factors; The fresh air purification unit includes a polarization unit and a purification unit. The polarization unit ionizes external interference factors and assigns positive or negative charges according to the different properties of particulate matter. The purification unit identifies and separates external interference factors with charges through the action of a magnetic field. The flow calculation unit is used to monitor the flow rate changes of water samples in real time and analyze the flow rate data. The raw water control unit is used to input water samples, perform parameter analysis on the added water samples, and adjust and control the water samples according to the analysis results and simulation requirements. The raw water control unit includes a control and regulation unit, a liquid replenishment unit, a drive unit, and a chemical dosing unit. The control and regulation unit is used to analyze and control the water sample parameters. The liquid replenishment unit is used to replenish water and add chemicals. The drive unit is used to drive the added water sample into the circulation of the device. The chemical dosing unit is used to add stabilizers as needed and add weak acids as needed according to the alkalinity of the water. It also includes a heating unit for staged heating of water samples, including a primary heating unit and a secondary heating unit connected in series; The raw water control unit drives the water sample to the tower pool for water sample circulation and transportation. The circulation path includes a tower pool unit, a mechanical ventilation tower unit, a heating unit, and a flow calculation unit connected in series. The other end of the flow calculation unit is connected to the tower pool unit.

2. The dynamic evaluation device for the fully automatic converter valve cooling system as described in claim 1, characterized in that, It also includes a forced ventilation unit, which uses mechanical force to forcibly control airflow, thereby achieving ventilation.

3. The dynamic evaluation device for the fully automatic converter valve cooling system as described in claim 1, characterized in that, The drive unit includes a first water sample drive pump, a water sample filter, and a raw water sample tank. After the water sample is added to the raw water sample tank, it is stored. After being filtered by the water sample filter, it enters the raw water control unit through the drive action of the first water sample drive pump. The raw water control unit controls and adjusts the water sample according to the simulation requirements, and then inputs the water sample into the circulating water circuit.

4. The dynamic evaluation device for the fully automatic converter valve cooling system as described in claim 1, characterized in that, It also includes a sewage purification unit for regularly purifying the tower pool and raw water control unit.

5. The dynamic evaluation device for the fully automatic converter valve cooling system as described in claim 1, characterized in that, It also includes a sampling unit for sampling and testing, including a manual sampling gate and an automatic sampling gate.

6. A dynamic evaluation method for a dynamic evaluation device of a fully automatic converter valve cooling system according to any one of claims 1-5, characterized in that, Includes the following steps: The raw water control unit is used to filter and adjust the parameters of the added water sample; The adjusted water sample is input into the tower pool, and the circulation simulation of the fully automatic converter valve cooling system is carried out with the tower pool as the source. The water sample in the circulation process is heated and energy exchanged according to the simulation requirements; Real-time monitoring of water sample parameters is used to evaluate the status of the fully automatic converter valve cooling system.

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