An aeration air volume coupling control method, device, medium and intelligent aeration system

Abstract

This application discloses an aeration airflow coupling control method, device, medium, and intelligent aeration system, relating to the field of wastewater treatment technology. The method includes: acquiring a total airflow feedback value and a total airflow setpoint; executing a total airflow control strategy based on the total airflow feedback value and the total airflow setpoint; the total airflow control strategy includes a total airflow increase control strategy or a total airflow decrease control strategy; the total airflow increase control strategy includes: global scheduling and control, determining whether to adjust the branch valves or the blower based on the total airflow increase value, valve opening, and blower total airflow efficiency, effectively avoiding repeated adjustments to the branch valves and blower, and improving the service life of the valves and blower; furthermore, when the current opening of the branch valve and the current total airflow efficiency of the blower are lower than their respective preset values, adjusting the branch valves can reduce the air resistance of the blower, prevent the blower from operating under pressure, and thus reduce the energy consumption of the blower.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and in particular to an aeration air volume coupling control method, device, medium and intelligent aeration system. Background Technology

[0002] In the biological treatment process, aeration is a crucial step in providing the oxygen needed for activated sludge. The aeration volume directly affects the dissolved oxygen concentration, which is a vital parameter determining the intensity of the biological reaction. Therefore, the matching of aeration volume and dissolved oxygen concentration directly impacts the effectiveness of the biological treatment. Traditionally, the aeration volume is controlled by manually adjusting the blower frequency and valve opening based on experience, while simultaneously monitoring dissolved oxygen levels and increasing the aeration volume if insufficient.

[0003] To achieve automation, a precision aeration system is currently used for control. This system calculates the required airflow for each biological treatment tank and sends it to the on-site control system for adjustment. The sum of the airflow for each biological treatment tank zone is used as the total airflow and is controlled by the blower control panel (MCP). The airflow for each zone is adjusted in real-time by the on-site distributed control system (DCS) manufacturer. Because the blower MCP and DCS systems are controlled independently, frequent adjustments are necessary to achieve their respective control targets. This can easily lead to frequent operation of the branch valves, affecting their lifespan. The total airflow is adjusted by the blower MCP. However, to ensure the required total airflow for the biological treatment system, the MCP's total airflow adjustment may result in excessively high mains pressure, causing blower pressure buildup. For example, when the branch valve opening increases, the main aeration pressure decreases without blower adjustment, inevitably leading to a blower total airflow feedback exceeding the required total airflow for the biological treatment system. In this case, the MCP must then implement blower airflow reduction control. Based on the above phenomena, long-term operation of the blower under pressure and frequent adjustments can easily cause blower failure and also lead to a corresponding increase in energy consumption.

[0004] Therefore, how to reduce the number of operations of branch valves to improve their service life, avoid blower pressure buildup and frequent adjustments, and thus improve blower service life and save energy are problems that need to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide an aeration air volume coupling control method, device, medium, and intelligent aeration system to solve the problems of the current blower MCP and DCS systems being controlled independently, which inevitably require frequent adjustments to achieve their respective control objectives. This can easily lead to frequent operation of branch pipe valves, affecting valve lifespan, and the blower's long-term pressure-locked operation and frequent adjustments can easily cause blower failures and increase energy consumption.

[0006] To solve the above-mentioned technical problems, this application provides an aeration air volume coupling control method, comprising:

[0007] Obtain the total air volume feedback value and the total air volume set value, and execute the total air volume control strategy based on the total air volume feedback value and the total air volume set value. The total air volume control strategy includes a total air volume increase control strategy or a total air volume decrease control strategy.

[0008] The total air volume increase control strategy includes:

[0009] Determine the current total air output efficiency of the blower, and determine the total air volume increase value based on the total air volume feedback value and the total air volume set value;

[0010] If the increase in total air volume belongs to the smallest interval in the preset range, the current opening degree of the branch valve corresponding to the biological tank is less than the first preset value, and the current total air output efficiency of the blower is lower than the second preset value, the branch valve is adjusted. If the current opening degree of the branch valve is greater than or equal to the first preset value, the total air output of the blower is increased by a preset increment.

[0011] When the increase in total air volume is outside the minimum range, the blower is adjusted to increase the total air volume of the blower.

[0012] Optionally, determining the current total air output efficiency of the blower includes:

[0013] Obtain the total flow rate, pressure, and total power consumption of the blower;

[0014] The total gas power is determined based on the total flow rate of the main pipe and the pressure of the main pipe, and the current total air output efficiency of the blower is determined based on the total gas power and the total power consumption of the blower.

[0015] Optionally, the step of executing the total air volume control strategy based on the total air volume feedback value and the total air volume setpoint includes:

[0016] If the total air volume setpoint is greater than the total air volume feedback value, and the absolute value of the difference between the total air volume setpoint and the total air volume feedback value is greater than the first setting error, the total air volume increase control strategy is executed.

[0017] If the total air volume setpoint is less than the total air volume feedback value, and the absolute value of the difference between the total air volume setpoint and the total air volume feedback value is greater than the first setting error, the total air volume reduction control strategy is executed.

[0018] Accordingly, determining the total air volume increase based on the total air volume feedback value and the total air volume setpoint includes:

[0019] The increase in total air volume is the total air volume setpoint minus the total air volume feedback value and the first setting error.

[0020] Optionally, adjusting the branch valve includes:

[0021] Obtain the zone airflow setpoint and zone airflow feedback value of the biochemical pool;

[0022] If the absolute value of the difference between the zone air volume setting value and the zone air volume feedback value is greater than the second setting error, the required air volume of the biological tank is determined according to the zone air volume setting value.

[0023] The target valve opening is determined based on the required air volume, and the branch valves of the biochemical tank are adjusted according to the target valve opening.

[0024] Optionally, determining the required air volume of the biological treatment tank based on the zoned air volume setting value includes:

[0025] If the zone airflow setting value is within the second preset range, the zone airflow setting value shall be used as the required airflow.

[0026] If the set value of the zone air volume is less than the lower limit of the second preset range, the lower limit value shall be used as the required air volume;

[0027] If the set value of the zone air volume is greater than the upper limit of the second preset range, the upper limit value shall be used as the required air volume.

[0028] Optionally, determining the target valve opening based on the required air volume includes:

[0029] The target valve opening corresponding to the required air volume is determined according to the first preset formula;

[0030] The first preset formula is: A = (Q1 / K*(P1-P2) / R)*100;

[0031] Where A is the target valve opening, Q1 is the required air volume, K is a constant, P1 is the main pipe pressure, P2 is the outlet pressure of the biochemical tank, and R is the air resistance.

[0032] Optionally, adjusting the branch valve of the biological treatment tank according to the target valve opening includes:

[0033] If the target valve opening is less than the minimum valve opening set by the system, the branch valve of the biochemical tank will be adjusted to the minimum valve opening.

[0034] If the target valve opening is greater than or equal to the minimum valve opening, the branch valve of the biochemical tank is adjusted to the target valve opening.

[0035] Optionally, adjusting the blower to increase the total air volume of the blower includes:

[0036] Determine the air volume difference between the total air volume of the blower when it is running at full load and the current total air volume of the blower.

[0037] If the air volume difference is greater than the total air volume increase, and the current number of blowers is one, determine the first target air volume of the current blower based on the total air volume increase, determine the first target frequency of the current blower based on the first target air volume, and adjust the frequency of the current blower to the first target frequency.

[0038] If the air volume difference is greater than the total air volume increase, and there are multiple blowers, determine the target blower to be adjusted and the second target air volume of the target blower based on the current air volume of each current blower and the total air volume increase. Determine the second target frequency of the target blower based on the second target air volume. Adjust the frequency of the target blower to the second target frequency so that the difference between the maximum operating frequency and the minimum operating frequency of the current blowers is less than a preset value.

[0039] If the air volume difference is less than the total air volume increase, the current blower is adjusted to full-load operation and the blower to be started is restarted.

[0040] If the air volume difference is equal to the total air volume increase, the current blower is adjusted to full load.

[0041] Optionally, restarting the blower to be started includes:

[0042] Update the total air volume increase value, determine the target output air volume of the blower to be started based on the updated total air volume increase value, and determine the target operating frequency based on the target output air volume;

[0043] Determine the minimum and maximum operating frequencies of the blower to be started;

[0044] If the target operating frequency is greater than or equal to the minimum operating frequency, and the target operating frequency is less than or equal to the maximum operating frequency, the frequency of the blower to be started is adjusted to the target operating frequency;

[0045] If the target operating frequency is greater than the maximum operating frequency, the frequency of the blower to be started is adjusted to the maximum operating frequency, the next blower to be started is turned on, and the step of updating the total air volume increase value is entered until the absolute value of the difference between the total air volume set value and the total air volume feedback value is less than the first set error.

[0046] If the target operating frequency is less than the minimum operating frequency, the frequency of the blower to be started is adjusted to the minimum operating frequency, and the frequency of the current blower is reduced, so that the absolute value of the difference between the total air volume set value and the total air volume feedback value is less than the first setting error.

[0047] Optionally, the target frequency of the blower can be determined based on the target air volume, including:

[0048] The target rotation speed corresponding to the target air volume is determined according to the second preset formula;

[0049] The second preset formula is: Q2 = r*v / t*k;

[0050] Where Q2 is the target air volume, r is the target rotational speed, v is the cylinder volume of the blower, t is the time required for each revolution of the blower, and k is a constant;

[0051] The target frequency corresponding to the target rotational speed is determined according to the third preset formula;

[0052] The third formula is r = f * 60 / number of pole pairs;

[0053] Where f is the target frequency, and the number of pole pairs is obtained from the rated speed and rated frequency of the blower.

[0054] Optionally, the current frequency of the blower can be adjusted to the target frequency, including:

[0055] If the increase in total air volume is within the maximum range of the preset range, determine the single adjustment range, adjust the frequency of the blower with the single adjustment range, and then adjust the frequency again with the set minimum interval time.

[0056] If the increase in total air volume is outside the maximum range, the interval for adjusting the blower frequency will increase sequentially within a preset time range.

[0057] Optionally, after obtaining the total air volume feedback value and the total air volume setpoint, the following may also be included:

[0058] If the total air volume setting value is within the first preset range, the total air volume setting value is determined to be valid;

[0059] If the total air volume setting value is less than the lower limit value of the first preset range, the lower limit value shall be used as the total air volume setting value;

[0060] If the total air volume setting value is greater than the upper limit value of the first preset range, the upper limit value is used as the total air volume setting value.

[0061] This application also provides an intelligent aeration system, including:

[0062] The total air volume acquisition module is used to acquire the total air volume feedback value and the total air volume set value, and execute the total air volume control strategy according to the total air volume feedback value and the total air volume set value. The total air volume control strategy includes a total air volume increase control strategy or a total air volume decrease control strategy.

[0063] The total air volume increase control strategy includes:

[0064] The first determining module is used to determine the current total air output efficiency of the blower and to determine the total air volume increase value based on the total air volume feedback value and the total air volume set value.

[0065] The first adjustment module is used to adjust the branch valve if the increase in total air volume belongs to the smallest interval in the preset interval, the current opening degree of the branch valve corresponding to the biochemical tank is less than the first preset value, and the current total air output efficiency of the blower is lower than the second preset value. If the current opening degree of the branch valve is greater than or equal to the first preset value, the total air output of the blower is increased by a preset increment.

[0066] The second adjustment module is used to adjust the blower to increase the total air volume when the increase in total air volume is outside the minimum range.

[0067] This application also provides an aeration air volume coupling control device, including a memory for storing computer programs;

[0068] A processor is used to implement the steps of the aeration air volume coupling control method when executing the computer program.

[0069] This application also provides a computer-readable storage medium storing a computer program, wherein the steps of the aeration air volume coupling control method are described when the computer program is executed by a processor.

[0070] This application provides an aeration airflow coupling control method, comprising: acquiring a total airflow feedback value and a total airflow setpoint; executing a total airflow control strategy based on the total airflow feedback value and the total airflow setpoint; the total airflow control strategy includes a total airflow increase control strategy or a total airflow decrease control strategy; the total airflow increase control strategy includes: determining the current total airflow efficiency of the blower; determining a total airflow increase value based on the total airflow feedback value and the total airflow setpoint; if the total airflow increase value belongs to the minimum range within a preset range, the current opening degree of the branch valve corresponding to the biological tank is less than a first preset value, and the current total airflow efficiency of the blower is lower than a second preset value, adjusting the branch valve; if the current opening degree of the branch valve is greater than or equal to the first preset value, increasing the total airflow of the blower by a preset increment; when the total airflow increase value is outside the minimum range, adjusting the blower to increase the total airflow of the blower. This application implements a global scheduling and control system. Based on the increase in total air volume, valve opening, and blower's total air output efficiency, it determines whether to adjust the branch valves or the blower, effectively avoiding repeated adjustments to the branch valves and blower, and extending their service life. Furthermore, when the current opening of the branch valve and the current total air output efficiency of the blower are lower than their respective preset values, adjusting the branch valves can reduce the blower's air resistance, prevent the blower from operating under pressure, and thus reduce the blower's energy consumption.

[0071] Furthermore, the total air volume reduction control strategy adjusts the blower based on the total air volume reduction value to lower the total blower output air volume, effectively preventing blower pressure buildup. When adjusting branch valves, the required air volume for the biological treatment tank is determined, and the target valve opening is determined based on the required air volume. The branch valve opening is then controlled according to the calculated target valve opening, eliminating the need for frequent valve control by the DCS system and further extending valve lifespan. When adjusting the blower, the range of the total air volume increase or decrease value is determined, along with the adjustment amplitude and time interval. This allows for stable tracking of zone air volume feedback values ​​and total air volume feedback values, reducing air volume fluctuations in the biological treatment zone and thus preventing large fluctuations in target dissolved oxygen and unstable effluent water quality.

[0072] The beneficial effects and methods of an aeration airflow coupling device, medium, and intelligent aeration system are as described above. The intelligent aeration system of this application directly replaces the function of the blower MCP, saving equipment costs. Attached Figure Description

[0073] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments 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.

[0074] Figure 1 A structural diagram of a conventional aeration air volume control system provided in this application embodiment;

[0075] Figure 2 A structural diagram of an aeration air volume control system provided in an embodiment of this application;

[0076] Figure 3 A flowchart of an aeration air volume coupling control method provided in an embodiment of this application;

[0077] Figure 4 A structural diagram of an intelligent aeration system provided in an embodiment of this application;

[0078] Figure 5 This is a structural diagram of an aeration air volume coupling control device provided in an embodiment of this application. Detailed Implementation

[0079] 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 protection scope of this application.

[0080] To facilitate understanding of this application, the existing aeration air volume control system will be introduced below. Figure 1 A structural diagram of a conventional aeration air volume control system provided in this application embodiment is shown below. Figure 1 As shown, the blower MCP adjusts the blower LCP (local control panel) based on the total air volume given by the aeration system, while the DCS system adjusts the air volume for each zone based on the zone air volume given by the aeration system. The total air volume is controlled by the blower MCP, while the zone air volume in the biological treatment tank is adjusted in real-time by the on-site DCS system. This control method suffers from the problem of independent control of the aeration system, blower control system, and DCS system, affecting air volume tracking effectiveness and consequently impacting the stable control of dissolved oxygen, the stability of effluent water quality, frequent equipment operation, and high energy consumption. Details are as follows:

[0081] 1. The total air volume is supplied to the blower's MCP (Multi-Pipe Control Center) for regulation. To ensure the required total air volume for the biological treatment system, the MCP's total air volume regulation may result in excessively high main pipe pressure, causing pressure buildup in the blower. When the branch pipe valve opening increases, the aeration main pipe pressure decreases without any adjustment, inevitably leading to a situation where the blower's total air volume feedback exceeds the biological treatment system's required total air volume. In this case, the MCP will again implement blower air volume reduction control. Based on the above phenomena, prolonged operation with pressure buildup and frequent adjustments can easily cause blower malfunctions and increase energy consumption.

[0082] 2. The air volume of the biological treatment tank is controlled by the on-site third-party control system (DCS system). Since the on-site third-party control system only focuses on the air volume adjustment of its own group of biological treatment tanks, there is a problem of interference in the air volume control of multiple groups of biological treatment tanks. For example, when adjusting the air volume of a certain group of biological treatment tanks, it will affect the air volume of other biological treatment tanks, and at the same time cause the branch pipe valves to operate frequently, affecting the service life of the valves.

[0083] 3. The air volume tracking of the biological treatment tank is unstable and fluctuates greatly, resulting in large fluctuations in the dissolved oxygen and unstable effluent quality.

[0084] 4. Manufacturers of precision aeration systems on the market typically require blowers to be equipped with MCP cabinets to adjust the blower airflow according to the given total aeration volume. Adding an additional MCP cabinet and its functionality inevitably increases the corresponding cost. Moreover, as an independent system, the MCP cabinet is difficult to control for multiple blowers.

[0085] The core of this application is to provide an aeration air volume coupling control method, device, medium, and intelligent aeration system, which reduces the number of actuation operations of branch valves to improve valve service life, avoids blower pressure buildup and frequent adjustments, thereby improving blower service life and saving energy.

[0086] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0087] Figure 2 A structural diagram of an aeration air volume control system provided in this application embodiment is shown below. Figure 2 As shown, Figure 2 As shown, 1 represents the intelligent aeration system, 2 the DCS system, 3 the blower LCP, 4 the biological treatment tank, 5 the main pipe, 6 the branch pipe, 7 the branch pipe valve, 8 the main pipe flow meter, 9 the main pipe pressure sensor, 10 the branch pipe flow meter, and 11 the branch pipe pressure sensor. The HZG-IAS intelligent aeration system collects relevant electrical data from the blower LCP and DCS system, including main pipe flow, main pipe pressure, valve opening, branch pipe flow, and branch pipe pressure. Based on the total air volume calculated by the system, it performs global linkage control and adjustment of the blower LCP, using the air flow feedback from the main pipe flow meter as feedback to ensure the required total air volume for the entire system. The zoned air volume of the biological treatment tank is calculated by the HZG-IAS intelligent aeration system based on the required air volume and the flow feedback from the branch pipe flow meters, determining the valve opening. The DCS system only needs to provide the valve opening value calculated by the HZG-IAS intelligent aeration system to the valve.

[0088] The intelligent aeration system acquires data on the voltage, current, frequency, speed, power, main pipe pressure, total main pipe flow, temperature, single run time, and cumulative run time of each blower via communication. It also acquires data on the branch pipe valve status, valve opening, flow rate (air volume), and pressure of the biological treatment tank. The acquired data is filtered, employing median-mean filtering and mean filtering methods based on actual conditions to resolve feedback data interference issues and provide smooth and stable data support for the control system.

[0089] Figure 3 A flowchart of an aeration airflow coupling control method provided in this application embodiment is shown below. Figure 3 As shown, the aeration air volume coupling control method includes:

[0090] S10: Obtain the total air volume feedback value and the total air volume setpoint, and execute the total air volume control strategy based on the total air volume feedback value and the total air volume setpoint. The total air volume control strategy includes a total air volume increase control strategy or a total air volume decrease control strategy.

[0091] S11: The total air volume increase control strategy includes: determining the current total air output efficiency of the blower, and determining the total air volume increase value based on the total air volume feedback value and the total air volume set value.

[0092] S12: If the increase in total air volume belongs to the smallest interval in the preset range, the current opening degree of the branch valve corresponding to the biological tank is less than the first preset value, and the current total air output efficiency of the blower is lower than the second preset value, the branch valve is adjusted. If the current opening degree of the branch valve is greater than or equal to the first preset value, the total air output of the blower is increased by the preset increment.

[0093] S13: When the increase in total air volume is outside the minimum range, adjust the blower to increase the total air volume of the blower.

[0094] In step S10, the intelligent aeration system calculates the required zone airflow for each biological tank according to a cycle, and the sum of all zone airflow setpoints is the total airflow setpoint. The total airflow setpoint is updated once according to the control cycle, which is determined by the intelligent aeration system based on on-site debugging, and is generally 10-30 minutes. The total airflow feedback value is the main airflow detected by the main flow meter 8. Regarding how to execute the total airflow control strategy based on the total airflow feedback value and the total airflow setpoint, this application embodiment does not specifically limit the implementation. It can be that if the total airflow setpoint is greater than the total airflow feedback value, a total airflow increase control strategy is executed; if the total airflow setpoint is less than the total airflow feedback value, a total airflow decrease control strategy is executed.

[0095] In step S11, the determination of the current total blower output efficiency involves: obtaining the total main pipe flow rate, main pipe pressure, and total blower power consumption; determining the total gas power based on the total main pipe flow rate and pressure; and determining the current total blower output efficiency based on the total gas power and total blower power consumption. The calculation formula is: Pa = Q3 * Pt / 1000, where Pa is the total gas power, Q3 is the total main pipe flow rate (measured by the main pipe flow meter 8), and the unit is converted to m³ / s. 3 / s; Pt is the main pipe pressure (measured by the main pipe pressure sensor), converted to Pa (N / ㎡). Then calculate the total power consumption of the blowers. The sum of the power of each blower is the total power consumption Pb of the blowers. The total air output efficiency of the current blowers is obtained by dividing the total gas power Pa by the total power consumption Pb of the blowers and multiplying it by 100%.

[0096] Regarding how to determine the increase in total air volume, this application does not impose specific limitations. The increase in total air volume can be the difference between the total air volume set value and the total air volume feedback value.

[0097] In step S12, for ease of understanding, the following example illustrates the process. The preset ranges, from smallest to largest, include: (1-50), (50-150), (150-300), and (above 300). The maximum value of each preset range is determined by the blower's performance and the maximum adjustment range for each step. The minimum range is (1-50), and the maximum range is (above 300). When the increase in total air volume falls within the minimum range, and the opening value of the branch valve corresponding to the biological tank is not 100% (current opening less than 90%), it indicates that the adjustment range for increasing the branch valve opening is greater than 10%, and the current total blower output efficiency is less than 60%. In this case, the branch valve is adjusted to reduce the blower's output resistance. If the current opening of the branch valve is greater than or equal to 90%, the blower is adjusted, specifically by adjusting the blower's frequency. Since the increase in total air volume is within the minimum range, only minor adjustments to the blower are needed. Generally, the total air volume of the blower is increased according to the preset increment. Specifically, the blower frequency is fine-tuned. The frequency value of the blower fine-tuning is determined through on-site experiments. Each time the blower frequency is adjusted, the system delays and waits to achieve the effect of increasing the total air volume.

[0098] In step S13, when the increase in total air volume is outside the minimum range, the blower is adjusted to increase the total air volume output of the blower. This adjustment may include adjusting the blower currently in operation, and / or restarting the blower to be started, depending on the specific circumstances.

[0099] This application provides an aeration airflow coupling control method, comprising: acquiring a total airflow feedback value and a total airflow setpoint; executing a total airflow control strategy based on the total airflow feedback value and the total airflow setpoint; the total airflow control strategy includes a total airflow increase control strategy or a total airflow decrease control strategy; the total airflow increase control strategy includes: determining the current total airflow efficiency of the blower; determining a total airflow increase value based on the total airflow feedback value and the total airflow setpoint; if the total airflow increase value belongs to the minimum range within a preset range, the current opening degree of the branch valve corresponding to the biological tank is less than a first preset value, and the current total airflow efficiency of the blower is lower than a second preset value, adjusting the branch valve; if the current opening degree of the branch valve is greater than or equal to the first preset value, increasing the total airflow of the blower by a preset increment; when the total airflow increase value is outside the minimum range, adjusting the blower to increase the total airflow of the blower. This application implements a global scheduling and control system. Based on the increase in total air volume, valve opening, and blower's total air output efficiency, it determines whether to adjust the branch valves or the blower, effectively avoiding repeated adjustments to the branch valves and blower, and extending their service life. Furthermore, when the current opening of the branch valve and the current total air output efficiency of the blower are lower than their respective preset values, adjusting the branch valves can reduce the blower's air resistance, prevent the blower from operating under pressure, and thus reduce the blower's energy consumption.

[0100] Based on the above embodiments, this application embodiment executes a total air volume control strategy according to the total air volume feedback value and the total air volume setpoint, including: if the total air volume setpoint is greater than the total air volume feedback value, and the absolute value of the difference between the total air volume setpoint and the total air volume feedback value is greater than a first setting error, a total air volume increase control strategy is executed; if the total air volume setpoint is less than the total air volume feedback value, and the absolute value of the difference between the total air volume setpoint and the total air volume feedback value is greater than the first setting error, a total air volume decrease control strategy is executed; correspondingly, determining the total air volume increase value according to the total air volume feedback value and the total air volume setpoint includes: the total air volume increase value is the total air volume setpoint minus the total air volume feedback value and the first setting error.

[0101] In this embodiment, the judgment is made as to whether the error between the total air volume feedback value and the total air volume setpoint is within a reasonable range, that is, allowing for a certain degree of error to avoid repeated adjustments. Accordingly, the total air volume increase value is the total air volume setpoint minus the total air volume feedback value and the first setting error. Compared to directly determining the total air volume increase value as the difference between the total air volume setpoint and the total air volume feedback value, this makes it less likely that the total air volume feedback value will be adjusted beyond the total air volume setpoint when adjusting the blower based on the total air volume increase value. The total air volume reduction control strategy can be: determining the total air volume reduction value based on the total air volume feedback value and the total air volume setpoint, and adjusting the blower based on the total air volume reduction value to reduce the total air volume output of the blower. Specifically, this will be further described below. The total air volume reduction value can be the total air volume feedback value minus the total air volume setpoint and the first setting error.

[0102] Based on the above embodiments, after obtaining the total air volume feedback value and the total air volume setting value, this application embodiment further includes: if the total air volume setting value is within a first preset range, determining that the total air volume setting value is valid; if the total air volume setting value is less than the lower limit of the first preset range, using the lower limit as the total air volume setting value; if the total air volume setting value is greater than the upper limit of the first preset range, using the upper limit as the total air volume setting value.

[0103] In this embodiment of the application, after obtaining the total air volume setpoint calculated by the system, the total air volume setpoint is also judged to prevent errors in the total air volume setpoint calculated by the system, which can further improve the reliability of aeration air volume control.

[0104] Based on the above embodiments, the present application embodiment adjusts the branch valve, including: obtaining the zone airflow setting value and the zone airflow feedback value of the biological treatment tank; if the absolute value of the difference between the zone airflow setting value and the zone airflow feedback value is greater than a second setting error, determining the required airflow of the biological treatment tank according to the zone airflow setting value; determining the target valve opening degree according to the required airflow, and adjusting the branch valve of the biological treatment tank according to the target valve opening degree; if the absolute value of the difference between the zone airflow setting value and the zone airflow feedback value is less than the second setting error, not adjusting the branch valve of the biological treatment tank.

[0105] This embodiment of the application determines the required air volume of the biological treatment tank based on the zone air volume setting value, specifically including: if the zone air volume setting value is within a second preset range, the zone air volume setting value is used as the required air volume; if the zone air volume setting value is less than the lower limit of the second preset range, the lower limit value is used as the required air volume; if the zone air volume setting value is greater than the upper limit of the second preset range, the upper limit value is used as the required air volume. In other words, this method judges the zone air volume setting value calculated by the system to determine whether it is within the process requirement range, thus avoiding calculation errors by the system.

[0106] Determining the target valve opening based on the required air volume specifically includes: determining the target valve opening corresponding to the required air volume according to a first preset formula; the first preset formula is: A = (Q 1 / K*(P1-P2) / R)*100; where A is the target valve opening, Q1 is the required air volume, K is a constant (K is a constant depending on the internal structure of the valve, and can be calculated and calibrated through experiments and actual installation of a thermal mass flow meter), P1 is the main pipe pressure (measured by the main pipe pressure sensor 9), P2 is the outlet pressure of the biological treatment tank, and R is the air resistance. The formula for calculating the air resistance R is R=ρ*L / d, where ρ is the air density, L is the length of the main pipe, and d is the diameter of the main pipe.

[0107] Adjusting the branch valves of the biological treatment tank according to the target valve opening specifically includes: if the target valve opening is less than the minimum valve opening set by the system, adjusting the branch valves of the biological treatment tank to the minimum valve opening; if the target valve opening is greater than or equal to the minimum valve opening, adjusting the branch valves of the biological treatment tank to the target valve opening. Setting the minimum valve opening of the branch valves of the biological treatment tank is to ensure the aeration intensity and effect of the biological treatment tank, prevent sludge settling, and also effectively avoid pressure buildup when the blower starts.

[0108] After the branch valve opening is adjusted to the target valve opening or the minimum valve opening, a delay is performed (delay time 10-60 seconds). The delay time is determined based on the on-site commissioning results and the allowable action interval of the branch valve. After the delay, if the absolute value of the difference between the zone air volume set value and the zone air volume feedback value is less than or equal to the second setting error, the adjustment is completed. If the absolute value of the difference is greater than the second setting error, the zone air volume feedback value is updated and the target valve opening is recalculated.

[0109] It should be noted that the first setting error in this application can be calculated by accumulating the second error based on the adjustment of the branch pipe valves, or it can be comprehensively determined based on the number of branch pipes, the normal air volume fluctuation range when the blower is running without system adjustment, and the 1%-5% range of the total air volume setting value. The total air volume control error (first setting error) is used to buffer the system air volume adjustment and can play a role in system stability control.

[0110] Based on the above embodiments, the adjustment of the blower to increase the total air volume of the blower in this application embodiment specifically includes: determining the air volume difference between the total air volume of the blower when it is running at full load and the current total air volume of the blower; if the air volume difference is greater than the increase in total air volume, and there is only one blower, determining a first target air volume of the blower based on the increase in total air volume, determining a first target frequency of the blower based on the first target air volume, and adjusting the frequency of the blower to the first target frequency; if the air volume difference is greater than the increase in total air volume, and there are multiple blowers... Based on the current air volume of each blower and the increase in total air volume, determine the target blower to be adjusted and the second target air volume of the target blower. Based on the second target air volume, determine the second target frequency of the target blower. Adjust the frequency of the target blower to the second target frequency so that the difference between the maximum and minimum operating frequencies of the current blowers is less than a preset value. If the air volume difference is less than the increase in total air volume, adjust the current blower to full-load operation and restart the blower to be started. If the air volume difference is equal to the increase in total air volume, adjust the current blower to full-load operation.

[0111] In this embodiment of the application, the total air volume of the blower when it is running at full load is the maximum total air volume that can be achieved. If the airflow difference is greater than the total airflow increase, it means that the required increase in airflow can be met by adjusting the frequency of the currently running blower. If there is only one blower, the frequency of the current blower can be directly adjusted to the calculated first target frequency. How to determine the first target frequency of the current blower based on the total airflow increase, and how to adjust the frequency of the current blower to the first target frequency, will be further introduced in the next embodiment. If there are multiple blowers, when adjusting the current blower, the premise is that the total airflow increase must be met, and the frequencies of the current blowers should be adjusted to be as close as possible. For ease of understanding, the following example illustrates that the target blower can be determined by taking the blower with the highest operating frequency and the blower with the lowest operating frequency as the target blowers. The frequency of the blower with the highest operating frequency can be reduced, and the frequency of the blower with the lowest operating frequency can be increased, but it is necessary to ensure that the airflow increases and meets the total airflow increase.

[0112] If the air volume difference is less than the total air volume increase, the current blower is adjusted to full-load operation, and then the blower to be started is restarted. This application embodiment does not specifically limit how to restart the blower; a specific solution will be further described below.

[0113] Based on the above embodiments, the present application embodiment restarts the blower to be started, including: updating the total air volume increase value; determining the target output air volume of the blower to be started based on the updated total air volume increase value; determining the target operating frequency based on the target output air volume; determining the minimum operating frequency and the maximum operating frequency of the blower to be started; if the target operating frequency is greater than or equal to the minimum operating frequency and less than or equal to the maximum operating frequency, adjusting the frequency of the blower to be started to the target operating frequency; if the target operating frequency is greater than the maximum operating frequency, adjusting the frequency of the blower to be started to the maximum operating frequency, starting the next blower to be started, and entering the step of updating the total air volume increase value, until the absolute value of the difference between the total air volume set value and the total air volume feedback value is less than the first setting error; if the target operating frequency is less than the minimum operating frequency, adjusting the frequency of the blower to be started to the minimum operating frequency and reducing the frequency of the current blower, so that the absolute value of the difference between the total air volume set value and the total air volume feedback value is less than the first setting error.

[0114] In this embodiment, the blowers to be started are turned on one by one, providing an update time for the total air volume feedback value after each adjustment. It is important to note that when the target operating frequency is lower than the minimum operating frequency of the blower, the frequency of the blower to be started is adjusted to the minimum operating frequency, and then the frequency of the current blower is reduced to ensure that the absolute value of the difference between the total air volume setpoint and the total air volume feedback value is less than the first set error. In other words, it is necessary to ensure that the blower's operating frequency does not fall below the minimum operating frequency to prevent wear and tear on the blower.

[0115] Based on the above embodiments, this application embodiment determines the target frequency of the blower according to the target air volume, including: determining the target speed corresponding to the target air volume according to a second preset formula; the second preset formula is: Q2=r*v / t*k; where Q2 is the target air volume, r is the target speed, v is the cylinder volume of the blower, t is the time required for each revolution of the blower, and k is a constant; determining the target frequency corresponding to the target speed according to a third preset formula; the third formula is r=f*60 / pole pair number; where f is the target frequency, and the pole pair number is obtained from the rated speed and rated frequency of the blower.

[0116] In this embodiment, after determining the target air volume of each blower based on the increase in total air volume, the target speed of each blower can be determined according to the second preset formula, and then the target frequency corresponding to the target speed can be calculated using the third preset formula. Here, Q2 is the target air volume, in meters per second (m³). 3 / s; r is the target rotational speed, in r / min. The system obtains the blower speed via communication, or obtains the current frequency of the blower via communication and converts it into the blower speed using the formula: r = f * 60 / number of pole pairs. The number of pole pairs can be calculated from the rated speed and rated frequency of the blower; v is the cylinder volume of the blower, in meters.3 The parameters are provided by the blower performance parameters or the blower manufacturer; t is the time required for each revolution of the blower, in seconds, and is calculated using the formula t = 60 / r; k is a constant that depends on the blower's structure, size, pressure, etc., and is obtained through experimental determination.

[0117] Based on the above embodiments, when adjusting the frequency of a running blower, this application does not adjust the current frequency to the target frequency all at once. Instead, it first determines the adjustment range and the adjustment time interval, gradually adjusting the current frequency to the target frequency. The purpose is to provide update time for the total air volume feedback value and reduce the number of adjustments. However, for a newly started blower awaiting startup, the frequency of the blower awaiting startup can be directly adjusted to the target frequency.

[0118] When adjusting a blower in operation, the following steps are also included: If the increase in total air volume falls within the maximum range of the preset interval (above 300), determine the single adjustment range, adjust the blower frequency according to this single adjustment range, and then perform the next frequency adjustment at the set minimum interval to improve adjustment efficiency. It is important to note that if the single adjustment range exceeds the blower's maximum allowable adjustment range, then adjust the blower according to its maximum allowable adjustment range to reduce damage to the blower. If the increase in total air volume falls outside the maximum range, the interval for blower frequency adjustment increases sequentially within a preset time range. The preset time range can be 10-30 seconds, and the specific interval should be determined based on the on-site commissioning results to ensure that the blower's output air volume can quickly reach the total air volume setpoint required by the aeration system.

[0119] Based on the above embodiments, the total air volume reduction control strategy in this application includes: obtaining a total air volume reduction value by subtracting the total air volume set value and the first set error from the total air volume feedback value, and adjusting the blower according to the total air volume reduction value to reduce the total air volume output of the blower.

[0120] Specifically, to reduce the frequency of the current blower, determine the number of blowers required to achieve the total airflow setpoint. If maintaining the current number of operating blowers, reduce their frequency. If there are multiple blowers, the frequency reduction adjustment should bring the frequencies of all blowers close to their operating frequencies. If one or more operating blowers can be paused, pause those blowers first, and then reduce the frequency of the remaining operating blowers. It's important to note that the blower adjustment range is generally 50%-100%, determined by the blower's performance.

[0121] Based on the above embodiments, in this application embodiment, when adjusting the blower and branch valves, the number of times the blower and branch valves are adjusted is accumulated within a preset time period (i.e., the update cycle of the total air volume setting value or the zone air volume setting value). If the number of adjustments exceeds the corresponding preset number, the system will issue a corresponding prompt. The preset number of adjustments for the blower is generally 1-3 times, and for the branch valves it is 1-10 times, depending on the actual on-site debugging.

[0122] In this embodiment of the application, when restarting a blower to be started, the blower with the shortest cumulative running time is given priority to be started. When pausing a blower that is in operation, the blower with the longest cumulative running time is also given priority to be paused.

[0123] In the above embodiments, the aeration air volume coupling control method has been described in detail. This application also provides embodiments corresponding to an intelligent aeration system. It should be noted that this application describes the embodiments of the device part from two perspectives: one is based on the functional module, and the other is based on the hardware.

[0124] Figure 4 A structural diagram of an intelligent aeration system provided in this application embodiment. The intelligent aeration system includes:

[0125] The total air volume acquisition module 20 is used to acquire the total air volume feedback value and the total air volume set value, and to execute the total air volume control strategy based on the total air volume feedback value and the total air volume set value. The total air volume control strategy includes a total air volume increase control strategy or a total air volume decrease control strategy.

[0126] The total air volume increase control strategies include:

[0127] The first determining module 21 is used to determine the current total air output efficiency of the blower and to determine the total air volume increase value based on the total air volume feedback value and the total air volume set value.

[0128] The first adjustment module 22 is used to adjust the branch valve if the increase in total air volume belongs to the smallest interval in the preset interval, the current opening degree of the branch valve corresponding to the biochemical tank is less than the first preset value, and the current total air output efficiency of the blower is lower than the second preset value. If the current opening degree of the branch valve is greater than or equal to the first preset value, the total air output of the blower is increased by a preset increment.

[0129] The second adjustment module 23 is used to adjust the blower to increase the total air volume when the increase in total air volume is outside the minimum range.

[0130] Based on the above embodiments, as an optional embodiment, the first determining module includes:

[0131] The first acquisition unit is used to acquire the total flow rate of the main pipe, the pressure of the main pipe, and the total power consumption of the blower.

[0132] The first determining unit is used to determine the total gas power based on the total flow rate and pressure of the main pipe, and to determine the current total air output efficiency of the blower based on the total gas power and the total power consumption of the blower.

[0133] Based on the above embodiments, as an optional embodiment, the total air volume acquisition module includes:

[0134] The first execution unit is used to execute a total air volume increase control strategy if the total air volume set value is greater than the total air volume feedback value and the absolute value of the difference between the total air volume set value and the total air volume feedback value is greater than the first setting error.

[0135] The second execution unit is used to execute a total air volume reduction control strategy if the total air volume setpoint is less than the total air volume feedback value and the absolute value of the difference between the total air volume setpoint and the total air volume feedback value is greater than the first setting error.

[0136] Accordingly, the first determining module includes:

[0137] The second determining unit is used to calculate the total air volume increase by subtracting the total air volume feedback value and the first setting error from the total air volume setpoint.

[0138] Based on the above embodiments, as an optional embodiment, the first adjustment module includes:

[0139] The second acquisition unit is used to acquire the zone airflow setpoint and zone airflow feedback value of the biochemical pool;

[0140] The third determining unit is used to determine the required air volume of the biological tank based on the zonal air volume setting value if the absolute value of the difference between the zonal air volume setting value and the zonal air volume feedback value is greater than the second setting error.

[0141] The fourth determining unit is used to determine the target valve opening based on the required air volume, and to adjust the branch valves of the biological treatment tank according to the target valve opening.

[0142] Based on the above embodiments, as an optional embodiment, the third determining unit includes:

[0143] The first determining subunit is used to take the zone air volume setting value as the required air volume if the zone air volume setting value is within the second preset range.

[0144] The second determining subunit is used to take the lower limit value as the required air volume if the zone air volume setting value is less than the lower limit value of the second preset range.

[0145] The third determining subunit is used to take the upper limit value as the required air volume if the zone air volume setting value is greater than the upper limit value of the second preset range.

[0146] Based on the above embodiments, as an optional embodiment, the fourth determining unit includes:

[0147] The fourth determining subunit is used to determine the target valve opening corresponding to the required air volume according to the first preset formula;

[0148] The first preset formula is: A=(Q1 / K*(P1-P2) / R)*100;

[0149] Where A is the target valve opening, Q1 is the required air volume, K is a constant, P1 is the main pipe pressure, P2 is the outlet pressure of the biochemical tank, and R is the air resistance.

[0150] Based on the above embodiments, as an optional embodiment, the fourth determining unit includes:

[0151] The first regulating subunit is used to adjust the branch valve of the biochemical tank to the minimum valve opening if the target valve opening is less than the minimum valve opening set by the system.

[0152] The second regulating subunit is used to adjust the branch valve of the biological tank to the target valve opening if the target valve opening is greater than or equal to the minimum valve opening.

[0153] Based on the above embodiments, as an optional embodiment, the second adjustment module includes:

[0154] The fifth determining unit is used to determine the air volume difference between the total air volume of the blower when it is running at full load and the current total air volume of the blower.

[0155] The first adjustment unit is used to determine the first target air volume of the current blower based on the total air volume increase value if the air volume difference is greater than the total air volume increase value and the current number of blowers is one, and to determine the first target frequency of the current blower based on the first target air volume, and to adjust the frequency of the current blower to the first target frequency.

[0156] The second adjustment unit is used to determine the target blower to be adjusted and the second target air volume of the target blower based on the current air volume of each current blower and the increase in the total air volume if the air volume difference is greater than the increase in the total air volume and there are multiple blowers. Based on the current air volume of each current blower and the increase in the total air volume, the second target frequency of the target blower is determined based on the second target air volume, and the frequency of the target blower is adjusted to the second target frequency so that the difference between the maximum operating frequency and the minimum operating frequency of the current blower is less than the preset value.

[0157] The third adjustment unit is used to adjust the current blower to full-load operation and restart the blower to be started if the air volume difference is less than the total air volume increase.

[0158] The fourth adjustment unit is used to adjust the current blower to full load if the air volume difference is equal to the total air volume increase.

[0159] Based on the above embodiments, as an optional embodiment, the third adjustment unit includes:

[0160] The fifth determination subunit is used to update the total air volume increase value, determine the target output air volume of the blower to be started based on the updated total air volume increase value, and determine the target operating frequency based on the target output air volume;

[0161] The sixth determining subunit is used to determine the minimum and maximum operating frequencies of the blower to be started;

[0162] The third adjustment subunit is used to adjust the frequency of the blower to be started to the target operating frequency if the target operating frequency is greater than or equal to the minimum operating frequency and the target operating frequency is less than or equal to the maximum operating frequency.

[0163] The fourth adjustment subunit is used to adjust the frequency of the blower to be started to the maximum operating frequency if the target operating frequency is greater than the maximum operating frequency, start the next blower to be started, and enter the step of updating the total air volume increase value until the absolute value of the difference between the total air volume set value and the total air volume feedback value is less than the first setting error.

[0164] The fifth adjustment subunit is used to adjust the frequency of the blower to be started to the minimum operating frequency if the target operating frequency is less than the minimum operating frequency, and to reduce the frequency of the current blower so that the absolute value of the difference between the total air volume set value and the total air volume feedback value is less than the first setting error.

[0165] Based on the above embodiments, as an optional embodiment, determining the target frequency of the blower according to the target air volume includes:

[0166] The second determining module is used to determine the target rotation speed corresponding to the target air volume according to the second preset formula;

[0167] The second preset formula is: Q2 = r*v / t*k;

[0168] Where Q2 is the target air volume, r is the target speed, v is the cylinder volume of the blower, t is the time required for each revolution of the blower, and k is a constant;

[0169] The third determining module is used to determine the target frequency corresponding to the target rotational speed according to the third preset formula;

[0170] The third formula is r = f * 60 / number of pole pairs;

[0171] Where f is the target frequency, and the number of pole pairs is obtained from the rated speed and rated frequency of the blower.

[0172] Based on the above embodiments, as an optional embodiment, adjusting the current frequency of the blower to the target frequency includes:

[0173] The third adjustment module is used to determine the single adjustment range if the increase in total air volume is within the maximum range of the preset range, and then adjust the frequency of the blower with the single adjustment range and then adjust the frequency again with the set minimum interval time.

[0174] The fourth adjustment module is used to adjust the frequency of the blower sequentially within a preset time range if the increase in total air volume is outside the maximum range.

[0175] Based on the above embodiments, as an optional embodiment, after obtaining the total air volume feedback value and the total air volume setpoint, the method further includes:

[0176] The fourth determining module is used to determine that the total air volume setting value is valid if the total air volume setting value is within the first preset range.

[0177] The fifth determining module is used to take the lower limit value as the total air volume setting value if the total air volume setting value is less than the lower limit value of the first preset range.

[0178] The sixth determining module is used to take the upper limit value as the total air volume setting value if the total air volume setting value is greater than the upper limit value of the first preset range.

[0179] Since the embodiments of the apparatus and the embodiments of the method correspond to each other, please refer to the description of the embodiments of the method for the embodiments of the apparatus, which will not be repeated here.

[0180] The intelligent aeration system provided in this application embodiment is used to obtain a total air volume feedback value and a total air volume setpoint, and to execute a total air volume control strategy based on the total air volume feedback value and the total air volume setpoint. The total air volume control strategy includes a total air volume increase control strategy or a total air volume decrease control strategy. The total air volume increase control strategy includes: determining the current total air output efficiency of the blower, determining the total air volume increase value based on the total air volume feedback value and the total air volume setpoint; if the total air volume increase value belongs to the minimum range in the preset range, the current opening degree of the branch valve corresponding to the biological tank is less than a first preset value, and the current total air output efficiency of the blower is lower than a second preset value, adjusting the branch valve; if the current opening degree of the branch valve is greater than or equal to the first preset value, increasing the total air output of the blower by a preset increment; when the total air volume increase value is outside the minimum range, adjusting the blower to increase the total air output of the blower. This application implements a global scheduling and control system. Based on the increase in total air volume, valve opening, and blower's total air output efficiency, it determines whether to adjust the branch valves or the blower, effectively avoiding repeated adjustments to the branch valves and blower, and extending their service life. Furthermore, when the current opening of the branch valve and the current total air output efficiency of the blower are lower than their respective preset values, adjusting the branch valves can reduce the blower's air resistance, prevent the blower from operating under pressure, and thus reduce the blower's energy consumption.

[0181] Figure 5 A structural diagram of an aeration airflow coupling control device provided in an embodiment of this application is shown below. Figure 5 As shown, the aeration air volume coupling control device includes: a memory 30 for storing computer programs;

[0182] The processor 31 is used to execute a computer program to implement the steps of the aeration air volume coupling control method as described in the above embodiments.

[0183] The aeration air volume coupling control device provided in this embodiment may include, but is not limited to, smartphones, tablets, laptops, or desktop computers.

[0184] The processor 31 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 31 may be implemented using at least one of the following hardware forms: Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 31 may also include a main processor and a coprocessor. The main processor, also known as the Central Processing Unit (CPU), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 31 may integrate a Graphics Processing Unit (GPU), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor 31 may also include an Artificial Intelligence (AI) processor, which is used to handle computational operations related to machine learning.

[0185] The memory 30 may include one or more computer-readable storage media, which may be non-transitory. The memory 30 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In this embodiment, the memory 30 is used to store at least the following computer program 301, which, after being loaded and executed by the processor 21, is capable of implementing the relevant steps of the aeration airflow coupling control method disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 30 may also include an operating system 202 and data 203, and the storage method may be temporary or permanent storage. The operating system 202 may include Windows, Unix, Linux, etc. The data 303 may include, but is not limited to, total airflow feedback values ​​and total airflow setpoints.

[0186] In some embodiments, the aeration air volume coupling control device may further include a display screen 32, an input / output interface 33, a communication interface 34, a power supply 35, and a communication bus 36.

[0187] Those skilled in the art will understand that Figure 5 The structure shown does not constitute a limitation on the aeration air volume coupling control device and may include more or fewer components than shown.

[0188] The aeration airflow coupling control device provided in this application includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the following method: obtain a total airflow feedback value and a total airflow setpoint; execute a total airflow control strategy based on the total airflow feedback value and the total airflow setpoint; the total airflow control strategy includes a total airflow increase control strategy or a total airflow decrease control strategy; wherein, the total airflow increase control strategy includes: determining the current total airflow efficiency of the blower; determining a total airflow increase value based on the total airflow feedback value and the total airflow setpoint; if the total airflow increase value belongs to the minimum range in the preset range, the current opening degree of the branch valve corresponding to the biological tank is less than a first preset value, and the current total airflow efficiency of the blower is lower than a second preset value, adjusting the branch valve; if the current opening degree of the branch valve is greater than or equal to the first preset value, increasing the total airflow of the blower by a preset increment; when the total airflow increase value is outside the minimum range, adjusting the blower to increase the total airflow of the blower.

[0189] Finally, this application also provides an embodiment corresponding to a computer-readable storage medium. The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps described in the aeration airflow coupling control method of the above-described method embodiment.

[0190] It is understood that if the methods in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and executes all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0191] The above provides a detailed description of an aeration airflow coupling control method, apparatus, medium, and intelligent aeration system provided in this application. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0192] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A method for coupled control of aeration air volume, characterized in that, include: Obtain the total air volume feedback value and the total air volume set value, and execute the total air volume control strategy based on the total air volume feedback value and the total air volume set value. The total air volume control strategy includes a total air volume increase control strategy or a total air volume decrease control strategy. The total air volume increase control strategy includes: Determine the current total air output efficiency of the blower, and determine the total air volume increase value based on the total air volume feedback value and the total air volume set value; If the increase in total air volume belongs to the smallest interval in the preset range, the current opening degree of the branch valve corresponding to the biological tank is less than the first preset value, and the current total air output efficiency of the blower is lower than the second preset value, the branch valve is adjusted. If the current opening degree of the branch valve is greater than or equal to the first preset value, the total air output of the blower is increased by a preset increment. When the increase in total air volume is outside the minimum range, the blower is adjusted to increase the total air volume of the blower.

2. The aeration air volume coupling control method according to claim 1, characterized in that, Determining the current total air output efficiency of the blower includes: Obtain the total flow rate, pressure, and total power consumption of the blower; The total gas power is determined based on the total flow rate of the main pipe and the pressure of the main pipe, and the current total air output efficiency of the blower is determined based on the total gas power and the total power consumption of the blower.

3. The aeration air volume coupling control method according to claim 1, characterized in that, The step of executing the total air volume control strategy based on the total air volume feedback value and the total air volume setpoint includes: If the total air volume setpoint is greater than the total air volume feedback value, and the absolute value of the difference between the total air volume setpoint and the total air volume feedback value is greater than the first setting error, the total air volume increase control strategy is executed. If the total air volume setpoint is less than the total air volume feedback value, and the absolute value of the difference between the total air volume setpoint and the total air volume feedback value is greater than the first setting error, the total air volume reduction control strategy is executed. Accordingly, determining the total air volume increase based on the total air volume feedback value and the total air volume setpoint includes: The increase in total air volume is the total air volume setpoint minus the total air volume feedback value and the first setting error.

4. The aeration air volume coupling control method according to claim 1, characterized in that, The adjustment of the branch valve includes: Obtain the zone airflow setpoint and zone airflow feedback value of the biochemical pool; If the absolute value of the difference between the zone air volume setting value and the zone air volume feedback value is greater than the second setting error, the required air volume of the biological tank is determined according to the zone air volume setting value. The target valve opening is determined based on the required air volume, and the branch valves of the biochemical tank are adjusted according to the target valve opening.

5. The aeration air volume coupling control method according to claim 4, characterized in that, Determining the required air volume for the biological treatment tank based on the zoned air volume setting value includes: If the zone airflow setting value is within the second preset range, the zone airflow setting value shall be used as the required airflow. If the set value of the zone air volume is less than the lower limit of the second preset range, the lower limit value shall be used as the required air volume; If the set value of the zone air volume is greater than the upper limit of the second preset range, the upper limit value shall be used as the required air volume.

6. The aeration air volume coupling control method according to claim 4, characterized in that, Determining the target valve opening based on the required air volume includes: The target valve opening corresponding to the required air volume is determined according to the first preset formula; The first preset formula is: A=(Q1 / K*(P1-P2) / R)*100; Where A is the target valve opening, Q1 is the required air volume, K is a constant, P1 is the main pipe pressure, P2 is the outlet pressure of the biochemical tank, and R is the air resistance.

7. The aeration air volume coupling control method according to claim 4, characterized in that, The adjustment of the branch valves of the biological treatment tank according to the target valve opening includes: If the target valve opening is less than the minimum valve opening set by the system, the branch valve of the biochemical tank will be adjusted to the minimum valve opening. If the target valve opening is greater than or equal to the minimum valve opening, the branch valve of the biochemical tank is adjusted to the target valve opening.

8. The aeration air volume coupling control method according to claim 3, characterized in that, The adjustment of the blower to increase the total air volume of the blower includes: Determine the air volume difference between the total air volume of the blower when it is running at full load and the current total air volume of the blower. If the air volume difference is greater than the total air volume increase, and the current number of blowers is one, determine the first target air volume of the current blower based on the total air volume increase, determine the first target frequency of the current blower based on the first target air volume, and adjust the frequency of the current blower to the first target frequency. If the air volume difference is greater than the total air volume increase, and there are multiple blowers, determine the target blower to be adjusted and the second target air volume of the target blower based on the current air volume of each current blower and the total air volume increase. Determine the second target frequency of the target blower based on the second target air volume. Adjust the frequency of the target blower to the second target frequency so that the difference between the maximum operating frequency and the minimum operating frequency of the current blowers is less than a preset value. If the air volume difference is less than the total air volume increase, the current blower is adjusted to full-load operation and the blower to be started is restarted. If the air volume difference is equal to the total air volume increase, the current blower is adjusted to full load.

9. The aeration air volume coupling control method according to claim 8, characterized in that, The process of restarting the blower to be started includes: Update the total air volume increase value, determine the target output air volume of the blower to be started based on the updated total air volume increase value, and determine the target operating frequency based on the target output air volume; Determine the minimum and maximum operating frequencies of the blower to be started; If the target operating frequency is greater than or equal to the minimum operating frequency, and the target operating frequency is less than or equal to the maximum operating frequency, the frequency of the blower to be started is adjusted to the target operating frequency; If the target operating frequency is greater than the maximum operating frequency, the frequency of the blower to be started is adjusted to the maximum operating frequency, the next blower to be started is turned on, and the step of updating the total air volume increase value is entered until the absolute value of the difference between the total air volume set value and the total air volume feedback value is less than the first set error. If the target operating frequency is less than the minimum operating frequency, the frequency of the blower to be started is adjusted to the minimum operating frequency, and the frequency of the current blower is reduced, so that the absolute value of the difference between the total air volume set value and the total air volume feedback value is less than the first setting error.

10. The aeration air volume coupling control method according to claim 8, characterized in that, Determine the target frequency of the blower based on the target air volume, including: The target rotation speed corresponding to the target air volume is determined according to the second preset formula; The second preset formula is: Q2 = r*v / t*k; Where Q2 is the target air volume, r is the target rotational speed, v is the cylinder volume of the blower, t is the time required for each revolution of the blower, and k is a constant; The target frequency corresponding to the target rotational speed is determined according to the third preset formula; The third preset formula is r = f * 60 / pole pair number; Where f is the target frequency, and the number of pole pairs is obtained from the rated speed and rated frequency of the blower.

11. The aeration air volume coupling control method according to claim 8, characterized in that, Adjusting the blower's current frequency to the target frequency includes: If the increase in total air volume is within the maximum range of the preset range, determine the single adjustment range, adjust the frequency of the blower with the single adjustment range, and then adjust the frequency again with the set minimum interval time. If the increase in total air volume is outside the maximum range, the interval for adjusting the blower frequency will increase sequentially within a preset time range.

12. The aeration air volume coupling control method according to claim 1, characterized in that, After obtaining the total air volume feedback value and the total air volume setpoint, the following is also included: If the total air volume setting value is within the first preset range, the total air volume setting value is determined to be valid; If the total air volume setting value is less than the lower limit value of the first preset range, the lower limit value shall be used as the total air volume setting value; If the total air volume setting value is greater than the upper limit value of the first preset range, the upper limit value is used as the total air volume setting value.

13. An intelligent aeration system, characterized in that, The aeration air volume coupling control method according to any one of claims 1 to 12 includes: The total air volume acquisition module is used to acquire the total air volume feedback value and the total air volume set value, and execute the total air volume control strategy according to the total air volume feedback value and the total air volume set value. The total air volume control strategy includes a total air volume increase control strategy or a total air volume decrease control strategy. The total air volume increase control strategy includes: The first determining module is used to determine the current total air output efficiency of the blower and to determine the total air volume increase value based on the total air volume feedback value and the total air volume set value. The first adjustment module is used to adjust the branch valve if the increase in total air volume belongs to the smallest interval in the preset interval, the current opening degree of the branch valve corresponding to the biochemical tank is less than the first preset value, and the current total air output efficiency of the blower is lower than the second preset value. If the current opening degree of the branch valve is greater than or equal to the first preset value, the total air output of the blower is increased by a preset increment. The second adjustment module is used to adjust the blower to increase the total air volume when the increase in total air volume is outside the minimum range.

14. An aeration airflow coupling control device, characterized in that, Includes memory used to store computer programs; A processor, configured to implement the steps of the aeration air volume coupling control method as described in any one of claims 1 to 12 when executing the computer program.

15. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the aeration airflow coupling control method as described in any one of claims 1 to 12.

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