Water treatment control method, device, equipment and medium

Abstract

The invention discloses a water treatment control method, device and equipment and a medium. The method comprises the following steps: collecting the turbidity and hardness of raw water, the inlet water temperature, the outlet water temperature, the inlet flow and the outlet flow of a heat exchanger, the real-time liquid level of a filtering water tank and the real-time output power of fluid supply equipment; the liquid level change rate, the heat exchange efficiency and the dynamic liquid level threshold value are calculated based on the collected data; working conditions are judged according to the relation between the real-time liquid level of the filtering pool and the dynamic liquid level threshold value; and outputting a control instruction to fluid supply equipment by combining the working condition result with the liquid level change rate and the heat exchange efficiency. By introducing the raw water quality parameters, the heat exchange efficiency and the liquid level change rate, the dynamic threshold value and the pre-judgment type control logic are constructed, fine control over fluid supply equipment is achieved, and the water quality stability and the energy utilization efficiency are further improved.

Description

Technical Field

[0001] This invention belongs to the field of water treatment technology and relates to a water treatment control method, device, equipment and medium. Background Technology

[0002] With semiconductor manufacturing reaching the nanometer level in chip manufacturing precision, high-purity water, as a key auxiliary medium in processes such as etching, cleaning, and thin film deposition, directly determines chip production yield due to its water quality stability. Even instantaneous fluctuations in water quality parameters can lead to problems such as circuit pattern defects and decreased film adhesion, causing significant production losses. In water treatment systems, the control precision and response speed of fluid supply equipment are crucial factors in ensuring the stability of high-purity water quality. Its operating status directly affects the temperature control effect of heat exchangers, thereby impacting the water production efficiency and water quality of subsequent pretreatment devices.

[0003] To address the slow response of traditional manually controlled fluid supply equipment, existing technologies have undergone targeted improvements. However, this type of dual-parameter-based switching control scheme still has significant technical limitations, making it difficult to meet the stringent requirements of semiconductor manufacturing for water quality stability. Specifically, these shortcomings are reflected in the following four aspects: Firstly, the limited number of parameters leads to low control precision. Existing technologies do not incorporate key indicators of raw water quality, and the turbidity of raw water directly affects the filtration speed of the pretreatment device. When the turbidity of the raw water is high, the filter media clogging rate accelerates, the pretreatment water production efficiency decreases significantly, and the replenishment speed of the filtration tank slows down. If the fluid supply equipment is still started at a fixed low liquid level threshold, it is easy to misjudge that "the liquid level has reached the start-up threshold but the pretreatment device has not yet produced qualified water," resulting in low-temperature water that has not been fully heat-exchanged by the heat exchanger directly entering the subsequent process, thus damaging the stability of water quality.

[0004] Secondly, the fixed threshold has poor adaptability. Existing technology cannot dynamically adjust according to the raw water quality conditions. For example, when the raw water hardness is low, the backwashing cycle of the multi-media filter in the pretreatment device is extended, the continuous water production efficiency is improved, and the liquid level in the filtration tank rises faster. At this time, the fixed low liquid level threshold will frequently trigger the start and stop of the fluid supply equipment, which not only increases the mechanical wear of the equipment, but also causes fluctuations in the supply of heat exchange fluid due to frequent start and stop, resulting in additional energy loss.

[0005] Third, it only controls the on / off state without power regulation. Current technology does not dynamically adjust the output power based on the real-time heat exchanger efficiency. In actual operation, heat exchangers are prone to scaling over long periods, leading to a decrease in heat exchange efficiency. If the fluid supply equipment continues to operate at a fixed power, either insufficient heat exchange will prevent the water temperature from meeting process requirements, affecting pretreatment results, or excessive power will be required to compensate for efficiency losses, resulting in unnecessary waste of electrical and thermal energy.

[0006] Fourth, it lacks predictive control logic. The control trigger relies entirely on real-time liquid level and water temperature data, without considering the dynamic parameter of the liquid level change rate. When a sudden increase in water consumption occurs in subsequent processes, the liquid level in the filtration tank will drop rapidly. However, the control mode based on real-time data will only activate the fluid supply equipment after the liquid level falls below the threshold, resulting in a significant response delay. During this delay, low-temperature water that has not undergone sufficient heat exchange will enter the pretreatment unit, leading to a decrease in the reaction efficiency of the pretreatment reagents and fluctuations in the adsorption performance of the filter media, ultimately affecting the quality of the high-purity water preparation.

[0007] In summary, while existing fluid supply equipment control schemes have solved the problem of slow response in traditional manual control, their shortcomings in control accuracy, adaptability to operating conditions, power regulation capability, and predictability still restrict the water quality stability and energy utilization efficiency of water treatment systems, making it difficult to meet the stringent requirements of semiconductor manufacturing processes for high-purity water. There is an urgent need to propose better control schemes to overcome the above-mentioned technical bottlenecks. Summary of the Invention

[0008] To address the problems existing in the background technology, this invention proposes a water treatment control method, device, equipment, and medium. It aims to improve water quality stability and energy utilization efficiency by introducing raw water quality parameters, heat exchange efficiency, and liquid level change rate to construct dynamic thresholds and predictive control logic.

[0009] The first aspect of this application provides a water treatment control method, comprising: Collect data on raw water turbidity and hardness, heat exchanger inlet water temperature, outlet water temperature, inlet flow rate, outlet flow rate, real-time liquid level in the filter tank, and real-time output power of the fluid supply equipment. The liquid level change rate, heat exchange efficiency, and dynamic liquid level threshold are calculated based on the collected data. The operating conditions are determined based on the relationship between the real-time liquid level and the dynamic liquid level threshold in the filtration tank. The system uses operating conditions, combined with the rate of liquid level change and heat exchange efficiency, to output control commands to the fluid supply equipment.

[0010] Optionally, the rate of change of liquid level is calculated, including: Obtain the filtered water tank in Real-time liquid level Real-time liquid level at time t2 ,in, > ; The formula for calculating the rate of change of liquid level is: ,in, The rate of change of liquid level; for The real-time liquid level of the filter tank is constantly monitored. for The real-time liquid level of the filter tank is constantly monitored. and All are time points.

[0011] Optionally, the heat exchange efficiency is calculated, including: Calculate the average flow rates at the inlet and outlet of the heat exchanger. Where F is the average flow rate at the inlet and outlet of the heat exchanger. This refers to the inlet flow rate of the heat exchanger. This refers to the heat exchanger outlet flow rate, expressed in cubic meters per hour. Calculate the actual heat exchanger capacity. Where, the actual heat exchange capacity of the heat exchanger is Q; C is the specific heat capacity of water; The density of water; This refers to the inlet water temperature of the heat exchanger. This refers to the outlet water temperature of the heat exchanger. Calculate the theoretical heat transfer capacity of the heat exchanger. ,in, P represents the theoretical heat exchange capacity of the heat exchanger, and P represents the real-time output power of the fluid supply equipment. Thermal efficiency of fluid supply equipment; heat exchange efficiency The calculation formula is .

[0012] Optionally, the calculation of the dynamic liquid level threshold includes calculating a dynamic low liquid level threshold and a dynamic high liquid level threshold, specifically: The formula for calculating the dynamic low liquid level threshold is: ,in, The dynamic low liquid level threshold; A fixed threshold for high liquid levels; is the correction factor for turbidity to the low liquid level threshold, where N is the raw water turbidity; Raw water turbidity reference value; is the correction factor for hardness on the low liquid level threshold; H is the raw water hardness; This is the baseline value for raw water hardness; The formula for calculating the dynamic high liquid level threshold is: ,in, For dynamic high liquid level threshold, To establish a fixed threshold for high liquid levels, This is the correction factor for turbidity on the high liquid level threshold; This is the correction factor for hardness on the high liquid level threshold.

[0013] Optionally, the operating conditions to be determined include low liquid level conditions, medium liquid level conditions, and high liquid level conditions; When the real-time liquid level in the filtration tank is less than or equal to the dynamic low liquid level threshold, it is determined to be a low liquid level condition. When the real-time liquid level of the filter tank is greater than the dynamic low liquid level threshold and the real-time liquid level of the filter tank is less than the dynamic high liquid level threshold, it is determined to be a medium liquid level condition. When the real-time liquid level in the filtration tank is greater than or equal to the dynamic high liquid level threshold, it is determined to be a high liquid level condition.

[0014] Optionally, the control command output method for low liquid level conditions is as follows: If the heat exchanger outlet water temperature is lower than the preset temperature threshold, then calculate the power adjustment coefficient. ,in, Power regulation coefficient, The preset temperature threshold; This refers to the outlet water temperature of the heat exchanger. This is the baseline value for heat exchange efficiency; For heat exchange efficiency; Calculate the target power based on the power regulation coefficient. P is the target power. Set the rated power of the fluid supply equipment; control the fluid supply equipment to operate at the target power. If the target power is less than or equal to 1.2 times the original target power, output an start command and a power adjustment command to the fluid supply equipment. If the heat exchanger outlet water temperature is greater than or equal to the preset temperature threshold, a shutdown command is sent to the fluid supply equipment, and the heat exchanger outlet water temperature is re-detected according to the preset time interval until the heat exchanger outlet water temperature is less than the preset temperature threshold, at which point the above power regulation is performed.

[0015] Optionally, the control command output method for the medium liquid level condition is as follows: If the rate of change of liquid level is greater than or equal to zero, the outlet water temperature of the heat exchanger is detected; if the outlet water temperature of the heat exchanger is less than the preset temperature threshold, the target power is calculated and an on command and a power adjustment command are output; if the outlet water temperature of the heat exchanger is greater than or equal to the preset temperature threshold, a off command is output; if the heat exchange efficiency is greater than the preset heat exchange efficiency threshold, a heat exchanger scaling warning is output, and the current target power is equal to 1.1 times the original target power, and a power adjustment command is output. If the rate of change of liquid level is less than zero, the outlet water temperature of the heat exchanger is detected; if the outlet water temperature of the heat exchanger is less than the preset temperature threshold, the target power is calculated, and when the current target power is equal to 1.05 times the original target power, the start command and power adjustment command are output; if the fluid supply equipment is already turned on, the target power is kept unchanged; if the fluid supply equipment is already turned off, the start command is output only when the outlet water temperature of the heat exchanger is less than the preset temperature threshold.

[0016] A second aspect of this application provides a water treatment control device, comprising: The data acquisition module is used to collect data on raw water turbidity and hardness, heat exchanger inlet water temperature, outlet water temperature, inlet flow rate, outlet flow rate, real-time liquid level in the filter tank, and real-time output power of the fluid supply equipment. The calculation module is used to calculate the liquid level change rate, heat exchange efficiency, and dynamic liquid level threshold based on the collected data; The judgment module is used to determine the operating conditions based on the relationship between the real-time liquid level and the dynamic liquid level threshold of the filtration tank. The output module is used to output control commands to the fluid supply equipment by combining the operating conditions with the liquid level change rate and heat exchange efficiency.

[0017] A third aspect of this application provides a computer device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described water treatment control method.

[0018] A fourth aspect of this application provides a computer-readable medium storing a computer program that, when executed by a processor, implements the above-described water treatment control method.

[0019] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a water treatment control method, apparatus, equipment, and medium. It collects data on raw water turbidity and hardness, heat exchanger inlet and outlet water temperatures, inlet and outlet flow rates, real-time liquid level in the filtration tank, and real-time output power of the fluid supply equipment. Based on the collected data, it calculates the liquid level change rate, heat exchange efficiency, and dynamic liquid level threshold. The operating conditions are determined according to the relationship between the real-time liquid level in the filtration tank and the dynamic liquid level threshold. Using the operating condition results combined with the liquid level change rate and heat exchange efficiency, control commands are output to the fluid supply equipment. This invention, by introducing raw water quality parameters, heat exchange efficiency, and liquid level change rate, constructs a dynamic threshold and predictive control logic to achieve refined control of the fluid supply equipment, further improving water quality stability and energy utilization efficiency. Attached Figure Description

[0020] Figure 1 This is a flowchart of a water treatment control method according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a water treatment control device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a computer device according to an embodiment of the present invention. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In one embodiment, such as Figure 1 As shown, a water treatment control method is provided, which is applied to... Figure 1 Taking China as an example, the following specific steps will be used: S10: Collects raw water turbidity and hardness, heat exchanger inlet water temperature, outlet water temperature, inlet flow rate, outlet flow rate, real-time liquid level in the filter tank, and real-time output power of the fluid supply equipment.

[0023] Specifically, raw water turbidity is collected using a turbidity sensor, which is installed at the inlet of the raw water entering the water treatment system. The sensor directly contacts the raw water to be treated to obtain turbidity data. This data is then transmitted to the control unit and used to calculate the dynamic low and high water level thresholds in the dynamic water level threshold calculation, in conjunction with the raw water hardness. This provides data support for adapting the dynamic water level threshold to different raw water qualities. Raw water hardness is collected using a hardness sensor, also installed at the inlet of the water treatment system, consistent with the turbidity sensor's location. The collected hardness and turbidity data work together as the basis for calculating the dynamic water level threshold, ensuring that the dynamic water level threshold can be adjusted according to changes in raw water hardness and avoiding the problem of fixed thresholds being unsuitable for raw water with different hardness levels.

[0024] The inlet water temperature of the heat exchanger is collected using a first temperature sensor, which is installed on the raw water inlet pipe of the heat exchanger. The sensor's probe is in direct contact with the raw water entering the heat exchanger. The collected inlet water temperature data is transmitted to the control terminal and used, along with the outlet water temperature, inlet flow rate, and outlet flow rate, to calculate the actual heat exchange capacity of the heat exchanger, thus providing necessary data for calculating the heat exchange efficiency. The outlet water temperature of the heat exchanger is collected using a second temperature sensor, which is installed on the raw water outlet pipe of the heat exchanger. The sensor's probe is in direct contact with the raw water flowing out of the heat exchanger after heat exchange. The collected data is used not only to calculate the actual heat exchange capacity but also to compare with a preset temperature threshold. This comparison serves as a key basis for determining whether to activate or adjust the power of the fluid supply equipment. When the outlet water temperature is lower than the preset temperature threshold, the power adjustment process of the fluid supply equipment needs to be activated. When the outlet water temperature is higher than or equal to the preset temperature threshold, it needs to be determined whether to shut down the fluid supply equipment.

[0025] The inlet flow rate of the heat exchanger is collected using a first flow sensor, which is installed on the raw water inlet pipe of the heat exchanger, adjacent to the first temperature sensor. This sensor collects the volume of raw water entering the heat exchanger per unit time. The collected inlet flow rate data is transmitted to the control terminal and used together with the outlet flow rate data to calculate the average inlet and outlet flow rate of the heat exchanger. This average inlet and outlet flow rate is one of the parameters used to calculate the actual heat exchange capacity of the heat exchanger. The outlet flow rate is collected using a second flow sensor, installed on the raw water outlet pipe of the heat exchanger, adjacent to the second temperature sensor. This sensor collects the volume of raw water flowing out of the heat exchanger per unit time. The average inlet and outlet flow rate calculated using the data collected by the second flow sensor, combined with the inlet flow rate data, directly affects the accuracy of the actual heat exchange capacity calculation, and consequently, the accuracy of the heat exchange efficiency determination.

[0026] Real-time liquid level data of the filtration tank needs to be collected through a third liquid level sensor. The third liquid level sensor is installed inside the filtration tank, and its detection range needs to cover the entire liquid level change range of the filtration tank to ensure that liquid level data at different heights in the filtration tank can be collected in real time and accurately. The collected real-time liquid level data of the filtration tank needs to be transmitted to the control terminal and compared with the dynamic low liquid level threshold and the dynamic high liquid level threshold to determine whether the water treatment system is currently in a low liquid level condition, a medium liquid level condition, or a high liquid level condition, providing a basis for determining the condition for subsequent output of control commands to the fluid supply equipment.

[0027] The real-time output power of the fluid supply equipment needs to be collected by establishing a data connection with the fluid supply equipment. During the collection process, the current power output value of the fluid supply equipment needs to be synchronized in real time. This value needs to be transmitted to the control terminal. On the one hand, it is used to calculate the theoretical heat exchange capacity of the heat exchanger and calculate the heat exchange efficiency in conjunction with the actual heat exchange capacity of the heat exchanger. On the other hand, it serves as the basis for adjusting the target power of the fluid supply equipment. When it is necessary to adjust the power of the fluid supply equipment, its real-time output power should be used as a reference, and the target power should be calculated in combination with the power adjustment coefficient to ensure that the power adjustment of the fluid supply equipment meets the heat exchange requirements and does not exceed the rated power range of the equipment.

[0028] S20: Calculates the liquid level change rate, heat exchange efficiency, and dynamic liquid level threshold based on the collected data.

[0029] Specifically, when calculating the rate of change of liquid level, the real-time liquid level of the filtration tank needs to be used as the basic data. First, the real-time liquid levels of the filtration tank at two different time points are obtained and denoted as follows: Real-time liquid level and Real-time liquid level And must meet > Due to time constraints, among which and All of these are specific time points. and All figures represent the water level in the filtration tank at the corresponding time points; then, according to the formula: rate of change of water level... The calculation yields the liquid level change rate, which directly reflects the trend of the liquid level in the filter tank. When the liquid level change rate is greater than zero, it indicates that the liquid level is rising; when the liquid level change rate is equal to zero, it indicates that the liquid level is stable; and when the liquid level change rate is less than zero, it indicates that the liquid level is falling. This provides liquid level trend reference data for the control logic after subsequent operating condition determination.

[0030] Calculating heat exchange efficiency requires the collection of data on the heat exchanger inlet water temperature, heat exchanger outlet water temperature, heat exchanger inlet flow rate, heat exchanger outlet flow rate, and the real-time output power of the fluid supply equipment. The calculation process consists of four steps: First, calculate the average inlet and outlet flow rates of the heat exchanger using the formula... Where F is the average flow rate at the inlet and outlet of the heat exchanger. This refers to the inlet flow rate of the heat exchanger. The first step is to calculate the outlet flow rate of the heat exchanger; the second step is to calculate the actual heat exchange capacity of the heat exchanger according to the formula. ", where C is the specific heat capacity of water, which is fixed at 4.2 kJ per kilogram of temperature in degrees Celsius. The density of water is fixed at 1000 kg per cubic meter. The collected inlet water temperature of the heat exchanger The third step is to collect the outlet water temperature of the heat exchanger; the third step is to calculate the theoretical heat transfer capacity of the heat exchanger according to the formula. , among which, among which, P represents the theoretical heat exchange capacity of the heat exchanger, and P represents the real-time output power of the fluid supply equipment. The fourth step is to calculate the heat exchange efficiency of the fluid supply equipment. According to the formula Heat exchange efficiency reflects the actual heat exchange performance of a heat exchanger and provides a basis for power regulation of fluid supply equipment and judgment of heat exchanger operating status.

[0031] When calculating the dynamic liquid level threshold, the collected raw water turbidity and hardness data must be used as the basis, and four fixed parameters must be preset: a fixed base threshold for low liquid level, a fixed base threshold for high liquid level, a raw water turbidity reference value, and a raw water hardness reference value. The dynamic low liquid level threshold is calculated using the following formula: ,in, This is the correction factor for turbidity on the low liquid level threshold. This is used to correlate raw water turbidity with a dynamic low-level threshold. By quantifying the impact of raw water turbidity changes on the water production efficiency of the pretreatment unit, the value of the dynamic low-level threshold is dynamically adjusted to ensure that it can adapt to the water production rhythm under different turbidity conditions. This avoids insufficient water level in the filtration tank or an imbalance in the water production rhythm due to fluctuations in raw water turbidity. N represents the collected raw water turbidity. This is the correction factor for hardness on the low liquid level threshold. By quantifying the impact of raw water hardness on the water production efficiency and backwash cycle of the pretreatment unit, the dynamic low-level threshold can be flexibly adjusted according to changes in raw water hardness. This ensures that the water level in the filtration tank remains stable within a reasonable range that matches the requirements of subsequent processes, while balancing the operating load and energy consumption cost of the pretreatment unit. H represents the collected raw water hardness, expressed in milligrams per liter. The dynamic high-level threshold is calculated using the following formula: ,in, This is the correction factor for turbidity to the high liquid level threshold, expressed in cubic meters per NTU. By quantifying the impact of raw water turbidity on the stability of pretreated water and the risk of liquid level fluctuations, a dynamic high liquid level threshold can be flexibly adjusted according to changes in raw water turbidity. This ensures that the filtration tank does not overflow due to excessively high liquid levels, while also preventing frequent start-ups and shutdowns of the pretreatment unit due to unreasonable thresholds, thus balancing liquid level safety and system operating efficiency. This is the correction factor for hardness on the high liquid level threshold. By quantifying the impact of raw water hardness on the stability of pretreated water, backwash frequency, and level fluctuation risk, a dynamic high-level threshold can be flexibly adjusted according to changes in raw water hardness. This ensures that the filtration tank does not overflow due to excessively high levels, while also preventing frequent start-ups and shutdowns of the pretreatment unit due to unreasonable thresholds, thus balancing level safety and system operating efficiency. Simultaneously, a calculated dynamic low-level threshold is established, with the constraint that it must be greater than or equal to a fixed low-level baseline threshold, which is the minimum allowable level in the filtration tank. Conversely, a calculated dynamic high-level threshold must be less than or equal to a fixed high-level baseline threshold, which is the maximum allowable level in the filtration tank. This ensures that the dynamic level thresholds remain within the safe operating range of the filtration tank, providing a precise threshold standard for determining operating conditions.

[0032] In this invention , , , The value should be determined based on the actual operating characteristics of the water treatment system, the water production performance of the pretreatment device, the fluctuation pattern of the raw water quality, and the safety operation requirements of the filtration tank, through experimental testing, historical operating data statistics, and process parameter calibration.

[0033] S30: Determine the operating condition based on the relationship between the real-time liquid level in the filtration tank and the dynamic liquid level threshold.

[0034] Specifically, when determining the operating condition of the water treatment system, the real-time liquid level of the filter tank collected by the third liquid level sensor in step S10 and the dynamic liquid level threshold calculated in step S20 are used as the basis for judgment. By comparing the numerical relationship between the real-time liquid level of the filter tank and the two dynamic liquid level thresholds, three different operating conditions are clearly distinguished, and the judgment criteria for each condition have a unique and clear numerical boundary. The specific judgment logic is as follows: When the real-time liquid level in the filtration tank is less than or equal to the dynamic low liquid level threshold, the system is determined to be in a low liquid level condition. Under this condition, the water volume in the filtration tank is insufficient to meet the needs of subsequent water treatment processes. The pretreatment unit needs to be started to produce water and replenish the water volume in the filtration tank. At this time, the control mode of the fluid supply equipment needs to be further determined based on the heat exchanger outlet water temperature to ensure that the replenished water meets the temperature requirements.

[0035] When the real-time liquid level in the filtration tank is greater than the dynamic low liquid level threshold but less than the dynamic high liquid level threshold, the system is considered to be in a medium liquid level operating condition. Under this condition, the water volume in the filtration tank is within the normal range, sufficient to balance the water produced by the pretreatment unit and the water demand of subsequent processes. There is no need to urgently start or stop the pretreatment unit. At this time, it is necessary to flexibly adjust the operating status of the fluid supply equipment by combining the liquid level change rate and heat exchange efficiency, balancing water quality compliance with energy conservation. The liquid level change rate reflects the future trend of liquid level changes, while the heat exchange efficiency reflects the heat exchanger's heat exchange performance.

[0036] When the real-time liquid level in the filtration tank is greater than or equal to the dynamic high liquid level threshold, the system is determined to be in a high liquid level condition. Under this condition, the water volume in the filtration tank has approached or reached its safe capacity limit. If water production continues, it may cause water overflow, posing a risk of equipment damage or process interruption. Therefore, the pretreatment unit must stop water production and immediately adjust the operating status of the fluid supply equipment to avoid unnecessary energy consumption. If the liquid level exceeds the safe range, alarms or drainage measures must also be activated.

[0037] S40: Utilizes operating conditions combined with the rate of liquid level change and heat exchange efficiency to output control commands to the fluid supply equipment.

[0038] Specifically, after determining whether the system is currently in a low, medium, or high liquid level condition, it is necessary to combine the liquid level change rate and heat exchange efficiency calculated in step S20, and output corresponding control commands to the fluid supply equipment according to the control logic of different conditions. The control commands specifically include start commands, stop commands, and power adjustment commands. The command output logic for each condition is as follows: If the system is determined to be in a low liquid level condition, the heat exchanger outlet water temperature collected by the second temperature sensor of the heat exchange module in step 1 should be referenced first. When the heat exchanger outlet water temperature is lower than the preset temperature threshold, the heat exchange efficiency calculated in step S20 should be used according to the formula. Calculate the power regulation coefficient, then use the formula Calculate the target power of the fluid supply equipment, ensuring that the target power does not exceed 1.2 times the rated power of the fluid supply equipment. Then, simultaneously output an start command and a power adjustment command to the fluid supply equipment, controlling it to operate at the target power. When the heat exchanger outlet water temperature is greater than or equal to a preset temperature threshold, output a stop command to the fluid supply equipment, and re-collect the heat exchanger outlet water temperature according to a preset time interval until the heat exchanger outlet water temperature is lower than the preset temperature threshold, then execute the above power calculation and command output operations again. Simultaneously, further predictive control is implemented based on the liquid level change rate: if the liquid level change rate is less than a preset threshold, calculate the predicted liquid level 5 minutes later using the formula: Predicted liquid level = Real-time liquid level in the filter tank + Liquid level change rate × 5. When the predicted liquid level is less than the dynamic low liquid level threshold minus 0.2 meters, output an start command to the fluid supply equipment 2 minutes in advance, controlling it to operate at 50% of the fluid supply equipment's rated power.

[0039] If the system is determined to be in a medium liquid level condition, the following steps need to be taken based on the numerical difference in the liquid level change rate: When the liquid level change rate is greater than or equal to zero, first check the heat exchanger outlet water temperature. If the heat exchanger outlet water temperature is less than the preset temperature threshold, calculate the target power according to the calculation method for the target power in the low liquid level condition, and output an opening command and a power adjustment command to the fluid supply equipment. If the heat exchanger outlet water temperature is greater than or equal to the preset temperature threshold, output a closing command to the fluid supply equipment. At the same time, the heat exchange efficiency needs to be considered. If the heat exchange efficiency is less than the preset heat exchange efficiency threshold, output a heat exchanger scaling warning, adjust the calculated target power to 1.1 times the original target power, and then output a power adjustment command. When the liquid level change rate is less than 0, the heat exchanger outlet water temperature is first detected. If the heat exchanger outlet water temperature is less than the preset temperature threshold, the original target power is calculated according to the target power calculation method under low liquid level conditions, and then adjusted to 1.05 times the original target power. Then, an opening command and a power adjustment command are sent to the fluid supply equipment. If the fluid supply equipment is already in the open state, the adjusted target power remains unchanged. If the fluid supply equipment is in the closed state, an opening command and an adjusted power adjustment command are only sent when the heat exchanger outlet water temperature is less than the preset temperature threshold minus 1 degree Celsius. The original target power mentioned in this invention refers to the target power of the fluid supply equipment calculated based on the heat exchanger outlet water temperature and heat exchange efficiency under specific operating conditions, before any additional power adjustment is made according to the liquid level change rate or heat exchange efficiency.

[0040] If the system is determined to be in a high liquid level condition, a shutdown command must be immediately sent to the fluid supply equipment to control it to stop within a preset time threshold. At the same time, a stop water production command should be sent to the preprocessing unit to prevent the real-time liquid level in the filtration tank from continuing to rise. In addition, the real-time liquid level in the filtration tank must be continuously monitored. When the real-time liquid level in the filtration tank is greater than the dynamic high liquid level threshold plus 0.3 meters, a high liquid level alarm for the filtration tank should be output, and the drain valve should be triggered to open to reduce the liquid level.

[0041] In one embodiment, such as Figure 2 As shown, a water treatment control device is provided, which corresponds one-to-one with the water treatment control method in the above embodiments. The water treatment control device includes: a data acquisition module, a calculation module, a judgment module, and a further detailed description of each functional module as follows: The data acquisition module is used to collect data on raw water turbidity and hardness, heat exchanger inlet water temperature, outlet water temperature, inlet flow rate, outlet flow rate, real-time liquid level in the filter tank, and real-time output power of the fluid supply equipment. The calculation module is used to calculate the liquid level change rate, heat exchange efficiency, and dynamic liquid level threshold based on the collected data; The judgment module is used to determine the operating conditions based on the relationship between the real-time liquid level and the dynamic liquid level threshold of the filtration tank. The judgment module is used to output control commands to the fluid supply equipment by combining the operating conditions with the liquid level change rate and heat exchange efficiency.

[0042] Specific limitations regarding the water treatment control device can be found in the limitations of the water treatment control method described above, and will not be repeated here. Each module in the aforementioned water treatment control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0043] In one embodiment, such as Figure 3 As shown, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements a water treatment control method.

[0044] For specific limitations on computer equipment, please refer to the limitations on water treatment control methods mentioned above, which will not be repeated here.

[0045] In one embodiment, a computer-readable medium is provided, the computer-readable medium storing a computer program, which, when executed by a processor, performs the following steps: Collect data on raw water turbidity and hardness, heat exchanger inlet water temperature, outlet water temperature, inlet flow rate, outlet flow rate, real-time liquid level in the filter tank, and real-time output power of the fluid supply equipment. The liquid level change rate, heat exchange efficiency, and dynamic liquid level threshold are calculated based on the collected data. The operating conditions are determined based on the relationship between the real-time liquid level and the dynamic liquid level threshold in the filtration tank. The system uses operating conditions, combined with the rate of liquid level change and heat exchange efficiency, to output control commands to the fluid supply equipment.

[0046] For specific limitations on computer-readable media, please refer to the limitations on water treatment control methods mentioned above, which will not be repeated here.

[0047] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0048] 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 water treatment control method, characterized in that, include: Collect data on raw water turbidity and hardness, heat exchanger inlet water temperature, outlet water temperature, inlet flow rate, outlet flow rate, real-time liquid level in the filter tank, and real-time output power of the fluid supply equipment. The liquid level change rate, heat exchange efficiency, and dynamic liquid level threshold are calculated based on the collected data. The operating conditions are determined based on the relationship between the real-time liquid level and the dynamic liquid level threshold in the filtration tank. The system uses operating conditions, combined with the rate of liquid level change and heat exchange efficiency, to output control commands to the fluid supply equipment.

2. The water treatment control method according to claim 1, characterized in that, Calculating the rate of change of liquid level includes: Obtain the filtered water tank in Real-time liquid level Real-time liquid level at time t2 ,in, Greater than ; The formula for calculating the rate of change of liquid level is: ,in, The rate of change of liquid level; for The real-time liquid level of the filter tank is constantly monitored. for The real-time liquid level of the filter tank is constantly monitored. and All are time points.

3. The water treatment control method according to claim 1, characterized in that, Calculating heat exchange efficiency includes: Calculate the average flow rates at the inlet and outlet of the heat exchanger. Where F is the average flow rate at the inlet and outlet of the heat exchanger. This refers to the inlet flow rate of the heat exchanger. This refers to the heat exchanger outlet flow rate; Calculate the actual heat exchanger capacity. Where, the actual heat exchange capacity of the heat exchanger is Q; C is the specific heat capacity of water; The density of water; This refers to the inlet water temperature of the heat exchanger. This refers to the outlet water temperature of the heat exchanger. Calculate the theoretical heat transfer capacity of the heat exchanger. ,in, P represents the theoretical heat exchange capacity of the heat exchanger, and P represents the real-time output power of the fluid supply equipment. Thermal efficiency of fluid supply equipment; heat exchange efficiency The calculation formula is .

4. The water treatment control method according to claim 1, characterized in that, The calculation of the dynamic liquid level threshold includes calculating the dynamic low liquid level threshold and the dynamic high liquid level threshold, specifically as follows: The formula for calculating the dynamic low liquid level threshold is: ,in, The dynamic low liquid level threshold; A fixed basic threshold is set for low liquid levels; is the correction factor for turbidity to the low liquid level threshold, where N is the raw water turbidity; Raw water turbidity reference value; is the correction factor for hardness on the low liquid level threshold; H is the raw water hardness; This is the baseline value for raw water hardness; The formula for calculating the dynamic high liquid level threshold is: ,in, For dynamic high liquid level threshold, For high liquid level fixed base threshold, This is the correction factor for turbidity on the high liquid level threshold; This is the correction factor for hardness on the high liquid level threshold.

5. The water treatment control method according to claim 1, characterized in that, The operating conditions to be determined include low liquid level, medium liquid level, and high liquid level conditions; When the real-time liquid level in the filtration tank is less than or equal to the dynamic low liquid level threshold, it is determined to be a low liquid level condition. When the real-time liquid level of the filter tank is greater than the dynamic low liquid level threshold and the real-time liquid level of the filter tank is less than the dynamic high liquid level threshold, it is determined to be a medium liquid level condition. When the real-time liquid level in the filtration tank is greater than or equal to the dynamic high liquid level threshold, it is determined to be a high liquid level condition.

6. The water treatment control method according to claim 5, characterized in that, The control command output method for low liquid level conditions is as follows: If the heat exchanger outlet water temperature is lower than the preset temperature threshold, then calculate the power adjustment coefficient. ,in, Power regulation coefficient, The preset temperature threshold; This refers to the outlet water temperature of the heat exchanger. This is the baseline value for heat exchange efficiency; For heat exchange efficiency; Calculate the target power based on the power regulation coefficient. P is the target power. Set the rated power of the fluid supply equipment; control the fluid supply equipment to operate at the target power. If the target power is less than or equal to 1.2 times the original target power, output an start command and a power adjustment command to the fluid supply equipment. If the heat exchanger outlet water temperature is greater than or equal to the preset temperature threshold, a shutdown command is sent to the fluid supply equipment, and the heat exchanger outlet water temperature is re-detected according to the preset time interval until the heat exchanger outlet water temperature is less than the preset temperature threshold, at which point the above power regulation is performed.

7. The water treatment control method according to claim 5, characterized in that, The control command output method for the medium liquid level condition is as follows: If the rate of change of liquid level is greater than or equal to zero, the outlet water temperature of the heat exchanger is detected; if the outlet water temperature of the heat exchanger is less than the preset temperature threshold, the target power is calculated and an on command and a power adjustment command are output; if the outlet water temperature of the heat exchanger is greater than or equal to the preset temperature threshold, a off command is output; if the heat exchange efficiency is less than the preset heat exchange efficiency threshold, a heat exchanger scaling warning is output, and the current target power is equal to 1.1 times the original target power, and a power adjustment command is output. If the rate of change of liquid level is less than zero, then the outlet water temperature of the heat exchanger is detected. If the outlet water temperature of the heat exchanger is lower than the preset temperature threshold, the target power is calculated, and the current target power is equal to 1.05 times the original target power before the start command and power adjustment command are output; if the fluid supply equipment is already turned on, the target power is kept unchanged. If the fluid supply equipment is shut down, the start command will only be output when the heat exchanger outlet water temperature is lower than the preset temperature threshold.

8. A water treatment control device, characterized in that, include: The data acquisition module is used to collect data on raw water turbidity and hardness, heat exchanger inlet water temperature, outlet water temperature, inlet flow rate, outlet flow rate, real-time liquid level in the filter tank, and real-time output power of the fluid supply equipment. The calculation module is used to calculate the liquid level change rate, heat exchange efficiency, and dynamic liquid level threshold based on the collected data; The judgment module is used to determine the operating conditions based on the relationship between the real-time liquid level and the dynamic liquid level threshold of the filtration tank. The judgment module is used to output control commands to the fluid supply equipment by combining the operating conditions with the liquid level change rate and heat exchange efficiency.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the water treatment control method according to any one of claims 1 to 7.

10. A computer-readable medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the water treatment control method according to any one of claims 1 to 7.

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