Dissolved oxygen concentration control method applied to aeration oxygenation system

Abstract

The invention relates to the technical field of sewage treatment and aquaculture, in particular to a dissolved oxygen concentration control method applied to an aeration oxygenation system.The method comprises the steps that dissolved oxygen data of a target area are periodically obtained, a first dissolved oxygen concentration difference is calculated, and when the first dissolved oxygen concentration difference is larger than or equal to a preset dissolved oxygen concentration difference threshold value, the first dissolved oxygen concentration difference is determined; starting an aeration control system, increasing the aeration amount to the target area, and setting a dissolved oxygen concentration standard value and a second dissolved oxygen concentration difference after a preset time to obtain an aeration standard amount; the aeration control system controls the output of the aeration equipment, performs aeration system detection once at a preset second time interval, and judges whether aeration is effective or not; and when the third dissolved oxygen concentration difference is smaller than a preset dissolved oxygen concentration difference threshold value, water temperature adjustment is executed, and the water body temperature of the target area is adjusted to the target temperature. According to the invention, the concentration of dissolved oxygen in the water body can be maintained in a set optimal range.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment and aquaculture, and more specifically to a dissolved oxygen concentration control method applied to an aeration and oxygenation system. Background Art

[0002] In the process of sewage treatment and aquaculture, dissolved oxygen (DO) is a key factor in maintaining biological activity, promoting the degradation of pollutants and supporting the growth of aquatic organisms, and has an important impact on the ecological environment and human health. Dissolved oxygen refers to the concentration of dissolved oxygen in water, usually expressed in milligrams per liter (mg / L). When the concentration of dissolved oxygen in water decreases, fish may be affected by stress and hypoxia, and show restlessness, agitation, abnormal swimming and other behaviors. Severe hypoxia may even lead to fish death, thus having a negative impact on water quality, ecological balance and human life. Therefore, how to control dissolved oxygen has become an urgent problem that needs to be solved.

[0003] In the prior art, aeration and oxygenation often rely on manual experience to adjust the aeration volume, which makes it difficult to achieve accurate control of dissolved oxygen concentration. Moreover, the specific requirements of dissolved oxygen concentration have not been fully considered, which may lead to excessive or insufficient aeration, resulting in energy waste and failure to achieve the expected dissolved oxygen control effect. Summary of the invention

[0004] The present invention provides a dissolved oxygen concentration control method applied to an aeration oxygenation system, aiming to ensure that the dissolved oxygen concentration in the water body is maintained within a set optimal range through real-time monitoring and intelligent regulation, thereby reducing energy consumption and operating costs.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides a method for controlling dissolved oxygen concentration in an aeration and oxygenation system, wherein a target area is set in a water body, and a dissolved oxygen monitoring device is installed in the target area, and the method is implemented by executing the following steps:

[0006] Step S1: The control unit periodically obtains the dissolved oxygen data of the target area from the dissolved oxygen monitoring device as first dissolved oxygen data based on a preset first time interval, wherein the first dissolved oxygen data includes dissolved oxygen concentration and water body temperature, calculates a first dissolved oxygen concentration difference based on the first dissolved oxygen data, and executes step S2 to start the aeration control system when the first dissolved oxygen concentration difference is greater than or equal to a preset dissolved oxygen concentration difference threshold;

[0007] Step S2: the aeration control system issues an aeration volume adjustment instruction to increase the aeration volume to the target area, and after a preset time, periodically obtains the dissolved oxygen data of the target area from the dissolved oxygen monitoring device again based on the preset first time interval as the second dissolved oxygen data, sets the dissolved oxygen concentration standard value based on the second dissolved oxygen data, calculates the second dissolved oxygen concentration difference based on the dissolved oxygen concentration standard value, and obtains the aeration standard volume, the aeration control system controls the aeration device to output aeration equal to the aeration standard volume, and performs an aeration system test once every preset second time interval to detect whether the aeration is effective;

[0008] Step S3: when testing the aeration system, a test is performed every time interval of the preset second time interval, and during the test, the dissolved oxygen data of the target area is periodically obtained from the dissolved oxygen monitoring device at the preset first time interval as the third dissolved oxygen data, and a third dissolved oxygen concentration difference is calculated based on the third dissolved oxygen data. When the third dissolved oxygen concentration difference is greater than or equal to the preset dissolved oxygen concentration difference threshold, the aeration is determined to be invalid, and the step S2 is executed. When the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, the aeration is determined to be valid, and the step S4 is executed, wherein the preset second time interval is greater than the preset first time interval;

[0009] Step S4: the control unit controls the water temperature to enter a self-regulating process, obtains the water temperature from the third dissolved oxygen data, and starts temperature adjustment measures, and when the aeration is effective and the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, adjusts the water temperature of the target area to the target temperature.

[0010] As a preferred technical solution of the present invention, the step S4 further includes:

[0011] Step S5: During the water temperature self-regulation process, if the water temperature of the target area is greater than or equal to the first temperature or less than the second temperature, and the dissolved oxygen concentration in the third dissolved oxygen data is decreasing, an early warning is issued. If the water temperature self-regulation is not performed or the water temperature self-regulation is invalid, the aeration volume of the aeration device is reduced to half of the most recent aeration volume. If the aeration volume at this time has been adjusted to the lowest value of the aeration device, an emergency instruction is issued, and a water change operation is performed on the target area at the same time. During the water change operation, the water change volume each time is less than or equal to N percent of the total water volume of the target area, and the dissolved oxygen concentration detection is continued after the water change operation. If the re-detected dissolved oxygen concentration still does not increase, an abnormal alarm is issued, and further detection is performed, where N represents a positive integer greater than or equal to 50 and less than 100.

[0012] As a preferred technical solution of the present invention, in step S1, calculating the first dissolved oxygen concentration difference includes:

[0013] The maximum value and the minimum value of the dissolved oxygen concentration are acquired from the first dissolved oxygen data, and the difference between the maximum value and the minimum value of the dissolved oxygen concentration is calculated as a first dissolved oxygen concentration difference.

[0014] As a preferred technical solution of the present invention, in step S2, setting the standard value of dissolved oxygen concentration includes:

[0015] The average value of all dissolved oxygen concentrations in the second dissolved oxygen data is calculated, and the difference between each dissolved oxygen concentration in the second dissolved oxygen data and the average value is calculated, and the dissolved oxygen concentration with the smallest difference from the average value is taken as the dissolved oxygen concentration standard value.

[0016] As a preferred technical solution of the present invention, in step S2, obtaining the aeration standard amount includes:

[0017] Calculate the difference between each dissolved oxygen concentration in the second dissolved oxygen data and the dissolved oxygen concentration standard value to obtain multiple second dissolved oxygen concentration differences. When any one of the multiple second dissolved oxygen concentration differences is less than the preset dissolved oxygen concentration difference threshold, use the aeration amount when obtaining the second dissolved oxygen data of the target area as the aeration standard amount.

[0018] As a preferred technical solution of the present invention, in step S4, starting the temperature adjustment measure includes:

[0019] When the water temperature is greater than or equal to the first temperature, cooling measures are initiated to adjust the water temperature of the target area to less than the first temperature. When the water temperature is less than the second temperature, insulation measures are initiated to adjust the water temperature of the target area to greater than or equal to the second temperature or increase the aeration amount.

[0020] As a preferred technical solution of the present invention, the water changing operation includes:

[0021] The temperature of the water body that is about to enter the target area is taken as the third temperature, and the temperature of the water body in the target area is taken as the fourth temperature, and the temperature difference between the third temperature and the fourth temperature is calculated. When the temperature difference is greater than or equal to the preset temperature difference, a cooling agent is added to the water body that is about to enter the target area. When the temperature difference is less than the preset temperature difference, a heating agent is added to the water body that is about to enter the target area.

[0022] As a preferred technical solution of the present invention, the aeration system detection further includes:

[0023] When the preset second time interval is reached, the dissolved oxygen data of the target area is obtained at the preset first time interval as the fourth dissolved oxygen data, the dissolved oxygen concentration is obtained from the fourth dissolved oxygen data, and the aeration amount of the aeration equipment is adjusted based on the comparison result between the dissolved oxygen concentration and the dissolved oxygen concentration standard value, and after adjusting the aeration amount, the aeration system detection continues to be started once every preset first time interval.

[0024] As a preferred technical solution of the present invention, adjusting the aeration amount of the aeration equipment includes:

[0025] When the dissolved oxygen concentration is less than or equal to the dissolved oxygen concentration standard value, the aeration standard amount is set equal to the current aeration amount of the aeration equipment.

[0026] As a preferred technical solution of the present invention, adjusting the aeration amount of the aeration equipment further comprises:

[0027] When the dissolved oxygen concentration is greater than the standard value of the dissolved oxygen concentration, the current aeration amount of the aeration equipment is set to be equal to the standard aeration amount.

[0028] Compared with the prior art, the beneficial effects of the present invention are at least as follows:

[0029] 1. The technical solution of the present invention periodically obtains the dissolved oxygen data of the target area from the dissolved oxygen monitoring device as the first dissolved oxygen data by presetting the first time interval. The first dissolved oxygen data includes the dissolved oxygen concentration and the water body temperature. The first dissolved oxygen concentration difference is calculated based on the first dissolved oxygen data, and when the first dissolved oxygen concentration difference is greater than or equal to the preset dissolved oxygen concentration difference threshold, the aeration control system is started, so as to ensure that timely measures are taken when the dissolved oxygen concentration is insufficient. The aeration control system issues an aeration volume adjustment instruction to increase the aeration volume to the target area, and after the preset time, periodically obtains the dissolved oxygen data of the target area from the dissolved oxygen monitoring device again based on the preset first time interval as the second dissolved oxygen data, sets the dissolved oxygen concentration standard value based on the second dissolved oxygen data, and calculates the second dissolved oxygen concentration difference based on the dissolved oxygen concentration standard value, and obtains the aeration standard volume. The aeration control system controls the aeration device to output aeration equal to the aeration standard volume, and performs an aeration system test at every preset second time interval to detect whether the aeration is effective; by accurately adjusting the aeration volume, ensure that the dissolved oxygen concentration reaches the preset standard.

[0030] 2. Perform an aeration test once at a preset second time interval, and during the test, periodically obtain the dissolved oxygen data of the target area from the dissolved oxygen monitoring equipment at a preset first time interval as the third dissolved oxygen data, calculate the third dissolved oxygen concentration difference based on the third dissolved oxygen data, and when the third dissolved oxygen concentration difference is greater than or equal to the preset dissolved oxygen concentration difference threshold, determine that the aeration is invalid, and increase the aeration amount again; when the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, determine that the aeration is effective, perform water temperature adjustment, and promptly discover and solve the problem of invalid aeration to avoid energy waste and environmental pollution caused by invalid aeration.

[0031] 3. The water temperature is also controlled to enter the self-regulation process, the water temperature is obtained from the third dissolved oxygen data, and the temperature adjustment measures are started. When aeration is effective and the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, the water temperature in the target area is adjusted to the target temperature to further improve the water quality and dissolved oxygen conditions, increase the biological activity of the water body, and promote the healthy development of the ecosystem. Through the mutual coordination between the above steps, the present invention can ensure that the dissolved oxygen concentration in the water body is maintained within the set optimal range, thereby reducing energy consumption and operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 The present invention is a flowchart of the steps of a method for controlling dissolved oxygen concentration in an aeration and oxygenation system. Figure 2 The figure is a schematic diagram of the working state of a dissolved oxygen monitoring device used in an aeration and oxygenation system in the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but unless otherwise specified, these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first xx script may be referred to as a second xx script, and similarly, a second xx script may be referred to as a first xx script.

[0036] Aeration often relies on manual experience to adjust the aeration volume, which makes it difficult to achieve precise control of dissolved oxygen concentration. Moreover, the specific needs of dissolved oxygen concentration have not been fully considered, which may lead to excessive or insufficient aeration, resulting in energy waste and failure to achieve the expected dissolved oxygen control effect.

[0037] In view of the above technical problems, the present invention proposes Figure 1 A method for controlling dissolved oxygen concentration in an aeration system is shown in FIG. Figure 2 As shown, a target area is set in the water body, and a dissolved oxygen monitoring device is installed in the target area, and the following steps are taken to achieve this:

[0038] Step S1: The control unit periodically obtains dissolved oxygen data of the target area from the dissolved oxygen monitoring device as first dissolved oxygen data based on a preset first time interval, wherein the first dissolved oxygen data includes dissolved oxygen concentration and water body temperature, calculates a first dissolved oxygen concentration difference based on the first dissolved oxygen data, and executes step S2 to start the aeration control system when the first dissolved oxygen concentration difference is greater than or equal to a preset dissolved oxygen concentration difference threshold;

[0039] Specifically, a fixed time interval (such as every 2 minutes) is set, and the dissolved oxygen concentration and water temperature data of the target area are automatically collected by the dissolved oxygen monitoring equipment, and these data are recorded as the first dissolved oxygen data. Subsequently, the control unit calculates the difference between the maximum and minimum dissolved oxygen concentrations collected this time, that is, the first dissolved oxygen concentration difference. If this difference is greater than or equal to the preset dissolved oxygen concentration difference threshold (for example, ±1 mg / L), it indicates that the dissolved oxygen concentration changes greatly and the aeration control system needs to be started. By real-time monitoring of the changes in dissolved oxygen concentration, timely measures can be taken when the dissolved oxygen concentration is insufficient. This collection refers to the continuous acquisition of data collected by multiple dissolved oxygen monitoring devices at fixed intervals. This collection includes one or more collection cycles.

[0040] Step S2: the aeration control system issues an aeration volume adjustment instruction to increase the aeration volume to the target area, and after a preset time, periodically obtains the dissolved oxygen data of the target area from the dissolved oxygen monitoring device again based on the preset first time interval as the second dissolved oxygen data, sets the dissolved oxygen concentration standard value based on the second dissolved oxygen data, calculates the second dissolved oxygen concentration difference based on the dissolved oxygen concentration standard value, and obtains the aeration standard volume, the aeration control system controls the aeration device to output aeration equal to the aeration standard volume, and performs an aeration system test at every preset second time interval to detect whether the aeration is effective;

[0041] Specifically, when step S1 determines that the aeration control system needs to be started, the system issues an instruction to increase the aeration volume of the target area. After a period of aeration, such as 20 minutes, the dissolved oxygen data is collected again and recorded as the second dissolved oxygen data. Based on these data, the system sets a standard value for dissolved oxygen concentration and calculates the difference between the current dissolved oxygen concentration and the standard value, i.e., the second dissolved oxygen concentration difference. At the same time, the aeration standard amount is calculated according to a preset algorithm or empirical formula. Afterwards, the aeration control system adjusts the output of the aeration equipment so that it is equal to the aeration standard amount, and performs an aeration effect test every certain period of time, such as 10 minutes. By accurately adjusting the aeration volume, ensure that the dissolved oxygen concentration reaches the preset standard.

[0042] Step S3: When testing the aeration system, a test is performed once at a preset second time interval. During the test, the dissolved oxygen data of the target area is periodically obtained from the dissolved oxygen monitoring equipment at a preset first time interval as the third dissolved oxygen data, and a third dissolved oxygen concentration difference is calculated based on the third dissolved oxygen data. When the third dissolved oxygen concentration difference is greater than or equal to a preset dissolved oxygen concentration difference threshold, aeration is determined to be invalid, and step S2 is executed. When the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, aeration is determined to be valid, and step S4 is executed, wherein the preset second time interval is greater than the preset first time interval.

[0043] Specifically, during the aeration system detection phase, the system detects once every 10 minutes, and collects dissolved oxygen data every 2 minutes, which is recorded as the third dissolved oxygen data. Based on these data, the third dissolved oxygen concentration difference is calculated and compared with the preset dissolved oxygen concentration difference threshold. If the difference is greater than or equal to the threshold, the aeration is determined to be invalid, and the above step S2 needs to be performed again. If the difference is less than the threshold, the aeration is determined to be effective, and the next step of water temperature adjustment is entered. Through regular detection, the problem of ineffective aeration can be discovered and solved in a timely manner to avoid energy waste and environmental pollution caused by ineffective aeration.

[0044] Step S4: The control unit controls the water temperature to enter a self-regulating process, obtains the water temperature from the third dissolved oxygen data, and starts temperature adjustment measures. When aeration is effective and the third dissolved oxygen concentration difference is less than a preset dissolved oxygen concentration difference threshold, the water temperature in the target area is adjusted to the target temperature.

[0045] Specifically, when aeration is effective and dissolved oxygen concentration is stable, the system enters the water temperature self-regulation process, extracts water temperature information from the third dissolved oxygen data, and initiates temperature adjustment measures (such as heating or cooling). The goal is to adjust the water temperature to the preset target temperature to further optimize the dissolved oxygen concentration and water quality. By adjusting the water temperature, the water quality and dissolved oxygen conditions are further improved, the biological activity of the water body is increased, and the healthy development of the ecosystem is promoted.

[0046] The data types included in the second dissolved oxygen data, the third dissolved oxygen data and the first dissolved oxygen data are consistent, and all include dissolved oxygen concentration and water body temperature.

[0047] Through the coordination of the above steps, the present invention can ensure that the dissolved oxygen concentration in the water body is maintained within a set optimal range, thereby reducing energy consumption and operating costs.

[0048] Furthermore, after the above step S4, the following steps are further included:

[0049] Step S5: During the water temperature self-regulation process, if the water temperature in the target area is greater than or equal to the first temperature or less than the second temperature, and the dissolved oxygen concentration in the third dissolved oxygen data is decreasing, an early warning is issued. If the water temperature self-regulation is not performed or the water temperature self-regulation is invalid, the aeration volume of the aeration equipment is reduced to half of the most recent aeration volume. If the aeration volume at this time has been adjusted to the minimum value of the aeration equipment, an emergency instruction is issued, and a water change operation is performed on the target area at the same time. During the water change operation, the water change volume each time is less than or equal to N percent of the total water volume in the target area, and the dissolved oxygen concentration is continued to be detected after the water change operation. If the re-detected dissolved oxygen concentration still does not increase, an abnormal alarm is issued and further detection is performed, where N represents a positive integer greater than or equal to 50 and less than 100.

[0050] Specifically, when the system detects the above abnormal situation, it will first issue an early warning to notify the operator to pay attention and prepare for emergency treatment. If the water temperature self-regulation is not performed at this time or the self-regulation is ineffective (that is, the temperature is still out of range and the dissolved oxygen concentration continues to decrease), the system will automatically adjust the aeration volume of the aeration equipment to reduce it to half of the aeration volume at the last adjustment. If the dissolved oxygen concentration has not improved after the aeration volume adjustment, and the aeration volume has been adjusted to the minimum value of the aeration equipment at this time, the system will issue an emergency instruction to prompt the operator to perform a water change operation. During the water change operation, the water change volume should be controlled within 80% of the total water volume in the target area each time to avoid excessive impact on the water quality during the water change process. After the water change operation is completed, the system will continue to detect the dissolved oxygen concentration. If the re-detected dissolved oxygen concentration still does not increase, the system will issue an abnormal alarm and recommend that the operator conduct further testing and analysis to determine the root cause of the problem. By real-time monitoring of changes in water temperature and dissolved oxygen concentration, abnormal conditions can be discovered and handled in a timely manner to prevent water quality deterioration. When the temperature is abnormal or the dissolved oxygen concentration drops, the aeration volume and water change operation can be adjusted to effectively improve the water quality. A reasonable water change volume and aeration volume adjustment range are also set to ensure the safety and effectiveness of the operation and avoid unnecessary interference with the water quality. Through the above steps, the entire dissolved oxygen concentration control method is more perfect, which can better respond to various emergencies and ensure the stability and compliance of water quality.

[0051] Furthermore, in the above step S1, calculating the first dissolved oxygen concentration difference includes:

[0052] The maximum value and the minimum value of the dissolved oxygen concentration are acquired from the first dissolved oxygen data, and the difference between the maximum value and the minimum value of the dissolved oxygen concentration is calculated as a first dissolved oxygen concentration difference.

[0053] Specifically, each acquisition includes one or more acquisition cycles, and all dissolved oxygen concentration values ​​within a time period can be obtained. The dissolved oxygen concentration during this period may be different. Among these different dissolved oxygen concentration values, find the maximum and minimum values, which represent the highest and lowest points of the dissolved oxygen concentration in the time period, respectively. Calculate the difference between the maximum and minimum values ​​of the dissolved oxygen concentration, and this difference is the first dissolved oxygen concentration difference. By calculating the difference between the maximum and minimum values ​​of the dissolved oxygen concentration, the fluctuation of the dissolved oxygen concentration within a time period can be intuitively reflected. If the first dissolved oxygen concentration difference is greater than or equal to the preset dissolved oxygen concentration difference threshold, it means that the fluctuation of the dissolved oxygen concentration is large, and it is necessary to start the aeration control system to adjust the dissolved oxygen concentration to ensure the stability of the water quality.

[0054] Furthermore, in the above step S2, setting the standard value of dissolved oxygen concentration includes:

[0055] The average value of all dissolved oxygen concentrations in the second dissolved oxygen data is calculated, and the difference between each dissolved oxygen concentration in the second dissolved oxygen data and the average value is calculated, and the dissolved oxygen concentration with the smallest difference from the average value is taken as the dissolved oxygen concentration standard value.

[0056] Specifically, a standard value of dissolved oxygen concentration is set to facilitate subsequent calculation of dissolved oxygen concentration difference and further adjustment of aeration volume. By calculating the average value of all dissolved oxygen concentrations in the second dissolved oxygen data and finding the dissolved oxygen concentration with the smallest difference from the average value as the standard value, it can be ensured that the standard value is representative and can reflect the overall dissolved oxygen concentration level after aeration adjustment. The subsequent calculation of dissolved oxygen concentration difference based on this standard value can more accurately evaluate the aeration effect and provide a basis for further aeration volume adjustment, thereby improving the accuracy and reliability of the entire control method.

[0057] Furthermore, in the above step S2, obtaining the aeration standard amount includes:

[0058] The difference between each dissolved oxygen concentration in the second dissolved oxygen data and the standard value of the dissolved oxygen concentration is calculated to obtain multiple second dissolved oxygen concentration differences. When any one of the multiple second dissolved oxygen concentration differences is less than a preset dissolved oxygen concentration difference threshold, the aeration amount when the second dissolved oxygen data of the target area is obtained is used as the aeration standard amount.

[0059] Specifically, by calculating the difference between each dissolved oxygen concentration and the standard value and checking whether these differences are less than a preset threshold, the effect of the current aeration amount can be accurately evaluated. If there is at least one difference less than the threshold, the aeration amount at this time is used as the standard amount, which can ensure that the aeration system operates at the optimal parameters, neither too much nor too little, thereby saving energy and maintaining good water quality.

[0060] Furthermore, in the above step S4, starting the temperature adjustment measure includes:

[0061] When the water temperature is greater than or equal to the first temperature, the cooling measures are started to adjust the water temperature in the target area to less than the first temperature. When the water temperature is less than the second temperature, the insulation measures are started to adjust the water temperature in the target area to greater than or equal to the second temperature or increase the aeration volume.

[0062] Specifically, by starting cooling or heat preservation measures in real time according to the water temperature, the system can ensure that the water temperature remains within an appropriate range, which is conducive to the maintenance of dissolved oxygen and biological activity. At the same time, adjusting the aeration volume as an auxiliary means can affect the water temperature to a certain extent, and at the same time adjust the dissolved oxygen concentration to achieve multiple control objectives. This refinement makes the self-regulation of water temperature more accurate and flexible, and improves the adaptability and effectiveness of the entire dissolved oxygen concentration and water quality control method. At the same time, it also reflects the advantages of this method in real-time monitoring, intelligent decision-making and multi-functional control.

[0063] Further, the water changing operation includes:

[0064] The temperature of the water body that is about to enter the target area is taken as the third temperature, and the temperature of the water body in the target area is taken as the fourth temperature. The temperature difference between the third temperature and the fourth temperature is calculated. When the temperature difference is greater than or equal to the preset temperature difference, a cooling agent is added to the water body that is about to enter the target area. When the temperature difference is less than the preset temperature difference, a heating agent is added to the water body that is about to enter the target area.

[0065] Specifically, by calculating the temperature difference and adding cooling or heating agents according to the above method, the temperature of the water newly entering the target area can be accurately controlled to avoid the adverse effects of sudden temperature changes on water quality and biological activities. This strategy improves the accuracy and flexibility of water exchange operations, ensures a smooth transition of water temperature, is conducive to maintaining good water quality and biological ecological balance, and improves the performance and effectiveness of the entire water quality management system.

[0066] Furthermore, the above-mentioned aeration system detection also includes:

[0067] When the second time interval is preset, the dissolved oxygen data of the target area is obtained at the preset first time interval as the fourth dissolved oxygen data, the dissolved oxygen concentration is obtained from the fourth dissolved oxygen data, and the aeration amount of the aeration equipment is adjusted based on the comparison result between the dissolved oxygen concentration and the standard value of the dissolved oxygen concentration, and after adjusting the aeration amount, the aeration system detection continues to be started once every preset first time interval.

[0068] Specifically, in the continuous monitoring and adjustment process of the aeration system, in order to ensure that the dissolved oxygen concentration is always maintained within the ideal range, the system can detect water quality changes in a timely manner and take corresponding adjustment measures by periodically obtaining dissolved oxygen data and comparing it with the standard value, which is beneficial to the survival of aquatic organisms and the stability of water quality. This detailed process makes the detection and adjustment process of the aeration system more scientific, accurate and efficient, and improves the response speed and stability of the entire water quality management system.

[0069] Further, adjusting the aeration amount of the aeration equipment includes:

[0070] When the dissolved oxygen concentration is less than or equal to the standard value of the dissolved oxygen concentration, the aeration standard amount is set equal to the current aeration amount of the aeration equipment.

[0071] Furthermore, adjusting the aeration amount of the aeration equipment also includes:

[0072] When the dissolved oxygen concentration is greater than the standard value of the dissolved oxygen concentration, the current aeration volume of the aeration equipment is set equal to the aeration standard volume.

[0073] Specifically, when adjusting the aeration volume of the aeration equipment, the system adopts the above strategy to ensure that the aeration volume can accurately meet the water quality requirements based on the comparison results of the dissolved oxygen concentration and the dissolved oxygen concentration standard value. By adjusting the aeration volume by comparing the dissolved oxygen concentration with the standard value, the system can ensure that the aeration volume is always kept within the appropriate range, neither too much nor too little. This strategy helps to improve the efficiency and accuracy of water quality regulation while reducing unnecessary energy consumption and negative impacts on the environment.

[0074] In summary, the present invention periodically obtains the dissolved oxygen data of the target area from the dissolved oxygen monitoring device as the first dissolved oxygen data by presetting the first time interval, the first dissolved oxygen data includes the dissolved oxygen concentration and the water body temperature, calculates the first dissolved oxygen concentration difference based on the first dissolved oxygen data, and starts the aeration control system when the first dissolved oxygen concentration difference is greater than or equal to the preset dissolved oxygen concentration difference threshold, so as to ensure that timely measures are taken when the dissolved oxygen concentration is insufficient. The aeration control system issues an aeration volume adjustment instruction to increase the aeration volume to the target area, and after a preset time, periodically obtains the dissolved oxygen data of the target area from the dissolved oxygen monitoring device again based on the preset first time interval as the second dissolved oxygen data, sets the dissolved oxygen concentration standard value based on the second dissolved oxygen data, calculates the second dissolved oxygen concentration difference based on the dissolved oxygen concentration standard value, and obtains the aeration standard volume, the aeration control system controls the aeration device to output aeration equal to the aeration standard volume, and performs an aeration system test every preset second time interval to detect whether the aeration is effective; by accurately adjusting the aeration volume, ensure that the dissolved oxygen concentration reaches the preset standard.

[0075] An aeration test is performed once at a preset second time interval, and during the test, the dissolved oxygen data of the target area is periodically obtained from the dissolved oxygen monitoring equipment at a preset first time interval as the third dissolved oxygen data, and a third dissolved oxygen concentration difference is calculated based on the third dissolved oxygen data. When the third dissolved oxygen concentration difference is greater than or equal to a preset dissolved oxygen concentration difference threshold, the aeration is determined to be invalid, and the aeration amount is increased again. When the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, the aeration is determined to be effective, and water temperature adjustment is performed, so as to promptly discover and solve the problem of invalid aeration, and avoid energy waste and environmental pollution caused by invalid aeration.

[0076] The water temperature is also controlled to enter a self-regulating process, the water temperature is obtained from the third dissolved oxygen data, and the temperature adjustment measures are started. When aeration is effective and the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, the water temperature in the target area is adjusted to the target temperature to further improve the water quality and dissolved oxygen conditions, increase the biological activity of the water body, and promote the healthy development of the ecosystem. Through the mutual coordination between the above steps, the present invention can ensure that the dissolved oxygen concentration in the water body is maintained within the set optimal range, thereby reducing energy consumption and operating costs.

[0077] It should be understood that, although the various steps in the flowchart of each embodiment of the present invention are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a portion of the steps in each embodiment may include a plurality of sub-steps or a plurality of stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these sub-steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0078] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the above-mentioned program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0079] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0081] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling dissolved oxygen concentration in an aeration and oxygenation system, wherein a target area is set in a water body and a dissolved oxygen monitoring device is installed in the target area, characterized in that: The method comprises the following steps: Step S1: The control unit periodically obtains the dissolved oxygen data of the target area from the dissolved oxygen monitoring device as first dissolved oxygen data based on a preset first time interval, wherein the first dissolved oxygen data includes dissolved oxygen concentration and water body temperature, calculates a first dissolved oxygen concentration difference based on the first dissolved oxygen data, and executes step S2 to start the aeration control system when the first dissolved oxygen concentration difference is greater than or equal to a preset dissolved oxygen concentration difference threshold; Step S2: the aeration control system issues an aeration volume adjustment instruction to increase the aeration volume to the target area, and after a preset time, periodically obtains the dissolved oxygen data of the target area from the dissolved oxygen monitoring device again based on the preset first time interval as the second dissolved oxygen data, sets the dissolved oxygen concentration standard value based on the second dissolved oxygen data, calculates the second dissolved oxygen concentration difference based on the dissolved oxygen concentration standard value, and obtains the aeration standard volume, the aeration control system controls the aeration device to output aeration equal to the aeration standard volume, and performs an aeration system test at every preset second time interval to detect whether the aeration is effective; Step S3: when testing the aeration system, a test is performed every time interval of the preset second time interval, and during the test, the dissolved oxygen data of the target area is periodically obtained from the dissolved oxygen monitoring device at the preset first time interval as the third dissolved oxygen data, and a third dissolved oxygen concentration difference is calculated based on the third dissolved oxygen data. When the third dissolved oxygen concentration difference is greater than or equal to the preset dissolved oxygen concentration difference threshold, the aeration is determined to be invalid, and the step S2 is executed. When the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, the aeration is determined to be valid, and the step S4 is executed, wherein the preset second time interval is greater than the preset first time interval; Step S4: the control unit controls the water temperature to enter a self-regulating process, obtains the water temperature from the third dissolved oxygen data, and starts temperature adjustment measures, and when the aeration is effective and the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, adjusts the water temperature of the target area to the target temperature.

2. The method according to claim 1, characterized in that After step S4, the following steps are also included: Step S5: During the water temperature self-regulation process, if the water temperature of the target area is greater than or equal to the first temperature or less than the second temperature, and the dissolved oxygen concentration in the third dissolved oxygen data is decreasing, an early warning is issued. If the water temperature self-regulation is not performed or the water temperature self-regulation is invalid, the aeration volume of the aeration device is reduced to half of the most recent aeration volume. If the aeration volume at this time has been adjusted to the lowest value of the aeration device, an emergency instruction is issued, and a water change operation is performed on the target area at the same time. During the water change operation, the water change volume each time is less than or equal to N percent of the total water volume of the target area, and the dissolved oxygen concentration detection is continued after the water change operation. If the re-detected dissolved oxygen concentration still does not increase, an abnormal alarm is issued, and further detection is performed, where N represents a positive integer greater than or equal to 50 and less than 100.

3. The method according to claim 1, characterized in that In the step S1, calculating the first dissolved oxygen concentration difference includes: The maximum value and the minimum value of the dissolved oxygen concentration are acquired from the first dissolved oxygen data, and the difference between the maximum value and the minimum value of the dissolved oxygen concentration is calculated as a first dissolved oxygen concentration difference.

4. The method according to claim 1, characterized in that: In step S2, setting the standard value of dissolved oxygen concentration includes: The average value of all dissolved oxygen concentrations in the second dissolved oxygen data is calculated, and the difference between each dissolved oxygen concentration in the second dissolved oxygen data and the average value is calculated, and the dissolved oxygen concentration with the smallest difference from the average value is taken as the dissolved oxygen concentration standard value.

5. The method according to claim 4, characterized in that In step S2, obtaining the aeration standard amount includes: Calculate the difference between each dissolved oxygen concentration in the second dissolved oxygen data and the dissolved oxygen concentration standard value to obtain multiple second dissolved oxygen concentration differences. When any one of the multiple second dissolved oxygen concentration differences is less than the preset dissolved oxygen concentration difference threshold, use the aeration amount when obtaining the second dissolved oxygen data of the target area as the aeration standard amount.

6. The method according to claim 2, characterized in that In step S4, starting the temperature adjustment measure includes: When the water temperature is greater than or equal to the first temperature, cooling measures are initiated to adjust the water temperature of the target area to less than the first temperature. When the water temperature is less than the second temperature, insulation measures are initiated to adjust the water temperature of the target area to greater than or equal to the second temperature or increase the aeration amount.

7. The method according to claim 2, characterized in that: Water change operations include: The temperature of the water body that is about to enter the target area is taken as the third temperature, and the temperature of the water body in the target area is taken as the fourth temperature, and the temperature difference between the third temperature and the fourth temperature is calculated. When the temperature difference is greater than or equal to the preset temperature difference, a cooling agent is added to the water body that is about to enter the target area. When the temperature difference is less than the preset temperature difference, a heating agent is added to the water body that is about to enter the target area.

8. The method according to claim 1, characterized in that Aeration system inspection also includes: When the preset second time interval is reached, the dissolved oxygen data of the target area is obtained at the preset first time interval as the fourth dissolved oxygen data, the dissolved oxygen concentration is obtained from the fourth dissolved oxygen data, and the aeration amount of the aeration equipment is adjusted based on the comparison result between the dissolved oxygen concentration and the dissolved oxygen concentration standard value, and after adjusting the aeration amount, the aeration system detection continues to be started once every preset first time interval.

9. The method according to claim 8, characterized in that Adjusting the aeration amount of the aeration device includes: When the dissolved oxygen concentration is less than or equal to the dissolved oxygen concentration standard value, the aeration standard amount is set equal to the current aeration amount of the aeration equipment.

10. The method according to claim 8, characterized in that Adjusting the aeration amount of the aeration device also includes: When the dissolved oxygen concentration is greater than the standard value of the dissolved oxygen concentration, the current aeration amount of the aeration equipment is set to be equal to the standard aeration amount.

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