Oxygen capture dynamic DO aeration control method and equipment

Abstract

The embodiment of the invention provides an oxygen capture dynamic DO aeration control method and equipment. The oxygen capture dynamic DO aeration control method comprises the following steps: determining an initial mapping relation between blast parameters and oxygen transfer efficiency; obtaining the current oxygen transfer efficiency in the water body; and determining a first target blast parameter of the blower based on the current oxygen transfer efficiency and the initial mapping relation. The oxygen capture dynamic DO aeration control equipment comprises a control cabinet, an aeration pipeline, an air blower and an oxygen transfer efficiency analyzer, the control cabinet and / or the oxygen transfer efficiency analyzer comprises one or more processors; the one or more processors comprise a mapping relation determination module, an oxygen transfer efficiency acquisition module and a blast parameter determination module and are used for executing the oxygen capture dynamic DO aeration control method.

Description

Description of the case

[0001] This application is a divisional application filed for a Chinese application with a filing date of January 19, 2023, an application number of 202310070428.2, and an invention name of “A method and equipment for dynamic DO aeration control for oxygen capture”. Technical Field

[0002] The present invention relates to the field of sewage treatment, and in particular to an oxygen capture dynamic DO aeration control method and equipment. Background Art

[0003] The energy consumption of my country's sewage treatment plants is mainly electricity consumption. Municipal sewage treatment plants consume about 0.3 kWh of electricity per ton of sewage treated, and industrial sewage treatment plants consume >1 kWh of electricity per ton of sewage treated. Electricity costs account for about 50%-70% of the total sewage treatment cost.

[0004] For aeration control of aerobic tanks in sewage treatment plants, the mainstream technology on the market is a control strategy that relies on dissolved oxygen. This method requires setting a target DO (dissolved oxygen) value, adjusting the blower air volume according to the actual DO value in the aerobic tank, and maintaining the actual DO value in the aerobic tank consistent with the set target value. Compared with the traditional manual extensive blower control, although it has achieved certain results, its technical principle is mainly a control method that uses a fixed DO value; at the same time, it is overly dependent on instruments, and the maintenance is large when used in a corrosive environment, resulting in poor stability of the control equipment, and a single DO value cannot accurately reflect the activity state of microorganisms in the mixed liquid and the water quality, and its function is limited to aeration control. Therefore, it is necessary to propose an aeration control method and equipment that can more accurately reflect the activity state of microorganisms in the water body and the water quality. Summary of the invention

[0005] One of the embodiments of this specification provides an oxygen capture dynamic DO aeration control method. The aeration control method includes: determining an initial mapping relationship between a blast parameter and an oxygen transfer efficiency; obtaining a current oxygen transfer efficiency in a water body; and determining a first target blast parameter of a blower based on the current oxygen transfer efficiency and the initial mapping relationship.

[0006] In some embodiments, determining the initial mapping relationship between aeration parameters and oxygen transfer efficiency includes: obtaining a plurality of calibrated oxygen transfer efficiencies after the water body is continuously aerated for a first preset period of time under a plurality of preset aeration parameters; and determining the initial mapping relationship based on the plurality of preset aeration parameters and the plurality of calibrated oxygen transfer efficiencies.

[0007] In some embodiments, the aeration control method further includes: continuously aerating the water body for a second preset time period based on the first target blowing parameter; obtaining an actual oxygen transfer efficiency of the water body after aeration; and determining a second target blowing parameter of the blower based on the actual oxygen transfer efficiency and the initial mapping relationship.

[0008] In some embodiments, the aeration control method further includes: updating the initial mapping relationship based on the actual oxygen transfer efficiency.

[0009] In some embodiments, updating the initial mapping relationship based on the actual oxygen transfer efficiency includes: updating the oxygen transfer efficiency mapping value of the first target air blowing parameter to the actual oxygen transfer efficiency.

[0010] In some embodiments, the aeration control method further includes: aerating the water body based on the first target aeration parameter; monitoring the dissolved oxygen value of the water body during aeration; and performing a warning operation in response to the dissolved oxygen value being lower than a first preset threshold or higher than a second preset threshold.

[0011] One of the embodiments of this specification provides an oxygen capture dynamic DO aeration control equipment. The aeration control equipment includes: a control cabinet, an aeration pipeline, a blower and an oxygen transfer efficiency analyzer; the control cabinet and / or the oxygen transfer efficiency analyzer include one or more processors; the one or more processors include: a mapping relationship determination module for determining an initial mapping relationship between a blast parameter and oxygen transfer efficiency; an oxygen transfer efficiency acquisition module for acquiring the current oxygen transfer efficiency in a water body; a blast parameter determination module for determining a first target blast parameter of the blower based on the current oxygen transfer efficiency and the initial mapping relationship.

[0012] One of the embodiments of the present specification provides another oxygen capture dynamic DO aeration control method. The aeration control method includes: determining a target mapping relationship between aeration parameters and oxygen transfer efficiency; obtaining the current oxygen transfer efficiency in the water body; and determining a target aeration parameter of a blower based on the current oxygen transfer efficiency and the target mapping relationship.

[0013] In some embodiments, determining the target mapping relationship between the blast parameter and the oxygen transfer efficiency includes: acquiring an initial mapping relationship between the blast parameter and the oxygen transfer efficiency; and performing iterative updating based on the initial mapping relationship to determine the target mapping relationship.

[0014] In some embodiments, obtaining the initial mapping relationship between aeration parameters and oxygen transfer efficiency includes: obtaining a plurality of calibrated oxygen transfer efficiencies after the water body is continuously aerated for a first preset period of time under a plurality of preset aeration parameters; and determining the initial mapping relationship based on the plurality of preset aeration parameters and the plurality of calibrated oxygen transfer efficiencies.

[0015] In some embodiments, the iterative update includes: obtaining a first oxygen transfer efficiency in the water body in the current iteration round; determining a first blowing parameter of the blower based on the first oxygen transfer efficiency and the current mapping relationship of the current iteration round, wherein the first oxygen transfer efficiency is a mapping value of the first blowing parameter in the current mapping relationship; obtaining a second oxygen transfer efficiency after the water body is continuously aerated for a second preset time period under the first blowing parameter; determining a second blowing parameter of the blower based on the second oxygen transfer efficiency and the current mapping relationship, wherein the second oxygen transfer efficiency is a mapping value of the second blowing parameter in the current mapping relationship; redetermining the mapping value of the first blowing parameter as the second oxygen transfer efficiency to update the current mapping relationship; and obtaining a third oxygen transfer efficiency after the water body is continuously aerated for a second preset time period under the second blowing parameter, and using the third oxygen transfer efficiency as the first oxygen transfer efficiency for the next iteration round.

[0016] In some embodiments, the aeration control method further includes: aerating the water body based on the target aeration parameters; monitoring the dissolved oxygen value of the water body during aeration; and performing a warning operation in response to the dissolved oxygen value being lower than a first preset threshold or higher than a second preset threshold.

[0017] One of the embodiments of this specification provides another oxygen capture dynamic DO aeration control equipment. The aeration control equipment includes: a control cabinet, an aeration pipeline, a blower and an oxygen transfer efficiency analyzer; the control cabinet and / or the oxygen transfer efficiency analyzer include one or more processors; the one or more processors include: a mapping relationship determination module, used to determine the initial mapping relationship and / or target mapping relationship between the blowing parameter and the oxygen transfer efficiency; an oxygen transfer efficiency acquisition module, used to obtain the current oxygen transfer efficiency in the water body; a blowing parameter determination module, used to determine the target blowing parameter of the blower based on the current oxygen transfer efficiency and the target mapping relationship. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0019] Figure 1 is a schematic diagram of the structure of an aeration control device according to some embodiments of this specification;

[0020] Figure 2 is a module diagram of a processor of an aeration control device according to some embodiments of the present specification;

[0021] Figure 3is an exemplary flow chart of an aeration control method according to some embodiments of the present specification;

[0022] Figure 4 is an exemplary flow chart of a method for determining an initial mapping relationship in an aeration control method according to some embodiments of this specification;

[0023] Figure 5 is another exemplary flow chart of the aeration control method according to some embodiments of this specification;

[0024] Figure 6 is a schematic diagram of an initial mapping relationship (fitting curve) in an aeration control method according to some embodiments of this specification;

[0025] Figure 7 is an exemplary flow chart of an aeration control method according to other embodiments of this specification;

[0026] Figure 8 is an exemplary flow chart of a method for iteratively updating a target mapping relationship of an aeration control method according to other embodiments of this specification;

[0027] In the figure: 100, aeration control equipment; 1, control cabinet; 2, aeration pipeline; 3, aerobic tank; 4, blower; 5, oxygen transfer efficiency analyzer. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the technical solutions of the embodiments of this specification, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of this specification. For ordinary technicians in this field, this specification can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0029] It should be understood that the "equipment", "unit" and / or "module" used herein is a method for distinguishing different components, elements, parts, parts or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0030] As shown in this specification and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0031] Flowcharts are used in this specification to illustrate the operations performed by the equipment according to the embodiments of this specification. It should be understood that the preceding or following operations are not necessarily performed precisely in order. On the contrary, the various steps may be processed in reverse order or simultaneously. At the same time, other operations may also be added to these processes, or one or more operations may be removed from these processes.

[0032] Determining the value of oxygen transfer efficiency is of great significance for evaluating the efficiency of sewage aeration on site. Under the condition of meeting the effluent standards, an aeration control equipment in good operating condition can have an aeration efficiency of >25%, while an aeration control equipment in poor operating condition can have an aeration efficiency of <15%. At present, the mainstream aeration control method on the market mainly adopts the method of controlling the dissolved oxygen value in the water body at a constant value. The dissolved oxygen value refers to the remaining dissolved oxygen in the aerobic pool 3. Only part of the oxygen entering the aerobic pool 3 is consumed by microorganisms, and the remaining oxygen is converted into residual dissolved oxygen and becomes tail gas escape. Simply focusing on the dissolved oxygen value is far from enough to fully grasp the efficiency of aeration control equipment, changes in water pollutant concentrations, microbial activity and water toxicity. For example, when all the microorganisms in the aerobic pool 3 are dead, there is no microorganism consuming oxygen at this time, and the value of the remaining dissolved oxygen will rise very high, so the traditional "controlling the remaining dissolved oxygen in the aerobic pool at a constant value" is not effective and there are safety risks. Therefore, this specification proposes an oxygen capture dynamic DO aeration control method and equipment that can more accurately reflect the activity state of microorganisms in water bodies and water quality conditions. This specification proposes an oxygen capture dynamic DO aeration control method based on the principle that if the concentration of pollutants in the water body increases, the oxygen mass transfer resistance in the water body increases, resulting in oxygen not being fully absorbed by the water body. At this time, the oxygen transfer efficiency decreases, which means that the ability of the water body to absorb oxygen decreases. At this time, the blower needs to operate at a large air volume to ensure that enough oxygen enters the water body; if the concentration of pollutants decreases, the oxygen mass transfer resistance in the water body decreases, oxygen is more easily absorbed by the water body, and the oxygen transfer efficiency increases, which means that the ability of the water body to absorb oxygen increases. At this time, the blower does not need to operate at a large air volume, and low air volume operation can ensure that enough oxygen enters the water body.

[0033] The oxygen capture dynamic DO aeration control method provided in some embodiments of this specification establishes a correlation between the blast parameters of the blower and the oxygen transfer efficiency in the water body, and thereby controls the aeration amount in the water body. Specifically, the method can first determine the mapping relationship between the blast parameters and the oxygen transfer efficiency, then obtain the current oxygen transfer efficiency in the water body, and then determine the blast parameters when aerating the water body based on the current oxygen transfer efficiency and the mapping relationship, and control the blower aeration. In some embodiments, the mapping relationship between the blast parameters and the oxygen transfer efficiency may include an initial mapping relationship. In some embodiments, the mapping relationship between the blast parameters and the oxygen transfer efficiency may also include a target mapping relationship. In some embodiments, the mapping relationship between the blast parameters and the oxygen transfer efficiency may also include a current mapping relationship. For a more detailed description of the initial mapping relationship, the target mapping relationship, the current mapping relationship, and their applications, please refer to the description elsewhere in this specification.

[0034] Figure 1 It is a schematic diagram of the structure of the aeration control equipment shown in some embodiments of this specification.

[0035] like Figure 1 As shown, the aeration control equipment 100 may include a control cabinet 1, an aeration pipeline 2, an aerobic tank 3, a blower 4 and an oxygen transfer efficiency analyzer 5. The oxygen transfer efficiency analyzer 5 is electrically connected to the control cabinet 1, and the control cabinet 1 is electrically connected to the blower 4. The oxygen transfer efficiency analyzer 5 is provided in the aerobic tank 3. The aeration mode of the aerobic tank 3 may be bottom aeration, and the aeration pipeline 2 is connected to the blower 4, and the oxygen transfer efficiency in the aerobic tank 3 is detected by the oxygen transfer efficiency analyzer 5 to control the blowing parameters of the blower 4. In some embodiments, the aeration control equipment 100 can be applied to industrial and municipal fields where sewage treatment is required.

[0036] In some embodiments, the various components of the aeration control equipment 100 may be connected to each other via a data connection line or a network. For example, the oxygen transfer efficiency analyzer 5 and the control cabinet 1 may be connected or communicated via a network.

[0037] The network may include any suitable network capable of facilitating information and / or data exchange of the aeration control equipment 100. In some embodiments, at least one component of the aeration control equipment 100 (e.g., the control cabinet 1, the aeration pipeline 2, the aerobic tank 3, the blower 4, and the oxygen transfer efficiency analyzer 5) may exchange information and / or data with at least one other component of the aeration control equipment 100 through the network. For example, the control cabinet 1 may obtain the oxygen transfer efficiency detected by the oxygen transfer efficiency analyzer 5 from the oxygen transfer efficiency analyzer 5 through the network. In some embodiments, the network may include at least one network access point. For example, the network may include a wired and / or wireless network access point (e.g., a base station and / or an Internet exchange point), and at least one component of the aeration control equipment 100 may be connected to the network through the access point to exchange data and / or information.

[0038] The control cabinet 1 can be used to control other devices in the aeration control equipment 100. For example, the control cabinet 1 can control the blower 4. For another example, the control cabinet 1 can control the oxygen transfer efficiency analyzer 5. The control cabinet 1 may include at least one processor. In some embodiments, the processor may process data and / or information obtained from the blower 4 or the oxygen transfer efficiency analyzer 5. In some embodiments, the processor may process instructions obtained from the network to control other devices (such as the blower 4) in the aeration control equipment 100. In some embodiments, the processor may obtain the current oxygen transfer efficiency from the oxygen transfer efficiency analyzer 5 for further calculation and determination of the blowing parameters of the blower 4 at the next moment. For another example, the processor may obtain the initial mapping relationship of the aeration control equipment 100 from the storage device, which is used as an initial reference when the aeration control equipment 100 is officially running. In some embodiments, the processor may be a single server or a server group. The server group may be centralized or distributed. In some embodiments, the processor may be local or remote.

[0039] In some embodiments, the control cabinet 1 may further include a storage device. The storage device may store data, instructions and / or any other information. In some embodiments, the storage device may store data and / or instructions used by the control cabinet 1 to execute or use to complete the exemplary method described in this specification. In some embodiments, the storage device may store an initial mapping relationship between blast parameters and oxygen transfer efficiency. In some embodiments, the storage device may include a large-capacity memory, a removable memory, a volatile read-write memory, a read-only memory (ROM), etc. or any combination thereof. In some embodiments, the storage device may be implemented on a cloud platform.

[0040] In some embodiments, the control cabinet 1 may further include an input device. In some embodiments, the input device may be disposed on the control cabinet 1. In some embodiments, the input device may also be external, for example, the input device may communicate and / or connect with the control cabinet 1, the blower 4, and the oxygen transfer efficiency analyzer 5. In some embodiments, the input device may include a mobile device, a tablet computer, a laptop computer, or the like, or any combination thereof. For example, the mobile device may include a mobile control handle, a personal digital assistant (PDA), a smart phone, or the like, or any combination thereof. The input device may be selected from keyboard input, touch screen (e.g., with tactile or tactile feedback) input, voice input, eye tracking input, gesture tracking input, image input, video input, or any other similar input mechanism. The input information received by the input device may be transmitted to the control cabinet 1 via a bus, for example, for further processing. Other types of input devices may include a cursor control device, for example, a mouse, a trackball, or a cursor direction key, etc. In some embodiments, a user may input a remote control signal via an input device. In some embodiments, a user may input a remote control signal (e.g., a blast parameter) via an input device.

[0041] In some embodiments, the control cabinet 1 may further include an output device. The output device may include a display, a speaker, a printer, etc., or any combination thereof. The output device may be used to output parameters related to the aeration control equipment 100. For example, the display may be used to display relevant information or images during the sewage treatment process in the aerobic tank 3, such as the current blast parameters of the blower 4, the current oxygen transfer efficiency detected by the oxygen transfer efficiency analyzer 5, or an image used to represent the mapping relationship between the blast parameters and the oxygen transfer efficiency.

[0042] It should be noted that the above description is provided for illustrative purposes only and is not intended to limit the scope of this specification. For those of ordinary skill in the art, various changes and modifications can be made under the guidance of the contents of this specification. The features, structures, methods and other features of the exemplary embodiments described in this specification can be combined in various ways to obtain additional and / or alternative exemplary embodiments. For example, the storage device can be a data storage device including a cloud computing platform, such as a public cloud, a private cloud, a community and a hybrid cloud. However, these changes and modifications will not deviate from the scope of this specification.

[0043] The aeration pipeline 2 is used to connect the blower 4 and the aerobic pool 3, and has the functions of aeration and oxygenation. One end of the aeration pipeline 2 is connected to the air outlet of the blower 4, and the other end is connected to the aeration device arranged at the bottom of the aerobic pool 3. The aeration pipeline 2 uses the blower 4 to transport air to the aeration device arranged at the bottom of the aerobic pool 3, and the air is dispersed and escaped in the form of bubbles, and the oxygen in the air is dissolved into the water body at the gas-liquid interface. In some embodiments, the aeration pipeline 2 can be connected to multiple aeration heads of the aeration device, and the distribution and number of the aeration heads can be set according to the oxygen demand of the aerobic pool 3 and the microbial community in the water body.

[0044] The aerobic pool 3 is a pool that maintains water parameters suitable for the growth and reproduction of aerobic microorganisms through aeration and other measures, thereby treating pollutants in the water. In some embodiments, different oxygen environments in the aerobic pool 3 are adapted to different microbial groups, and the microorganisms will also change their behavior when the environment changes, thereby achieving the purpose of removing different pollutants.

[0045] The blower 4 is used to supply oxygen and aeration to the aerobic pool 3 , and can increase oxygen for the microorganisms in the aerobic pool 3 .

[0046] In some embodiments, the blower 4 may be a variable frequency blower. In some embodiments, the blower 4 may be a magnetic suspension blower, an air suspension blower, a Roots blower with a frequency converter, a centrifugal blower with a frequency converter, or other types of blowers with a frequency converter. The specific model of the blower 4 can be selected by calculating the air volume and pressure according to the air-water ratio, water depth, pipeline load, etc., and then determining which blower to use, as well as the specific model and motor power.

[0047] The oxygen transfer efficiency analyzer 5 is installed floatingly on the liquid surface of the aerobic pool 3, and can collect the value of the oxygen transfer efficiency in the aerobic pool 3 in real time. The bottom of the oxygen transfer efficiency analyzer 5 is a gas collecting hood, which can collect the exhaust gas escaping from the surface of the aerobic pool 3, and then calculate the value of the oxygen transfer efficiency according to the temperature of the exhaust gas, the flow rate, pressure, water temperature, dissolved oxygen value in the water body in the aerobic pool 3, and the pool depth of the aerobic pool 3. If the pollutant concentration in the aerobic pool 3 increases, the oxygen mass transfer resistance in the water body increases, resulting in the inability of the water body to fully absorb oxygen. At this time, the oxygen transfer efficiency decreases, which means that the ability of the water body to absorb oxygen decreases. At this time, the blower 4 needs to increase the air volume to ensure that enough air enters the water body in the aerobic pool 3; if the pollutant concentration in the aerobic pool 3 decreases, the oxygen mass transfer resistance in the water body decreases, and oxygen is more easily absorbed by the water body. At this time, the oxygen transfer efficiency increases, which means that the ability of the water body to absorb oxygen increases. At this time, the blower 4 does not need to operate with a large air volume. Low air volume operation can ensure that enough oxygen enters the water body, so the air volume of the blower 4 can be adjusted to a lower level.

[0048] Oxygen transfer efficiency (OTE) refers to the percentage of oxygen transferred to the water in the aerobic pool 3 in the total oxygen supply, and is one of the important parameters for examining aeration efficiency. The value of oxygen transfer efficiency is affected by many factors, including the blowing parameters of the blower 4, the depth of the aerobic pool 3, the water temperature in the aerobic pool 3, the distribution of aeration heads in the aeration pipeline 2, the number of aeration heads, the state of aeration heads, the activity state of microorganisms in the water in the aerobic pool 3, the types of water pollutants, etc.

[0049] The control cabinet 1, aeration pipeline 2, aerobic tank 3, blower 4 and oxygen transfer efficiency analyzer 5 described in this specification are all well-known hardware to those skilled in the art, and there is no special restriction on their sources in this application.

[0050] It should be noted that the above description is provided for illustrative purposes only and is not intended to limit the scope of the present application. For those of ordinary skill in the art, under the guidance of the content of the present application, various changes and modifications can be made. The features, structures, methods and other features of the exemplary embodiments described in the present application can be combined in various ways to obtain additional and / or alternative exemplary embodiments.

[0051] Figure 2 is a module diagram of a processor of an aeration control device according to some embodiments of the present specification.

[0052] In some embodiments, the control cabinet 1 and / or the oxygen transfer efficiency analyzer 5 may include one or more processors. Figure 2 As shown, the one or more processors 200 include: a mapping relationship determination module 210, an oxygen transfer efficiency acquisition module 220, and a blast parameter determination module 230. In some embodiments, the mapping relationship determination module 210, the oxygen transfer efficiency acquisition module 220, and the blast parameter determination module 230 can be implemented by a processor (e.g., a processor in the control cabinet 1 and / or the oxygen transfer efficiency analyzer 5). In other embodiments, the mapping relationship determination module 210 and the blast parameter determination module 230 can also be set on the processor of the control cabinet 1, and the oxygen transfer efficiency acquisition module 220 can be set on the processor of the oxygen transfer efficiency analyzer 5.

[0053] In some embodiments, the mapping relationship determination module 210 may be used to determine an initial mapping relationship between air blast parameters and oxygen transfer efficiency. In some embodiments, the mapping relationship determination module 210 may also be used to update the initial mapping relationship based on the actual oxygen transfer efficiency. In other embodiments, the mapping relationship determination module 210 may also be used to determine a target mapping relationship between air blast parameters and oxygen transfer efficiency. In other embodiments, the mapping relationship determination module 210 may also be used to iterate the target mapping relationship between air blast parameters and oxygen transfer efficiency.

[0054] In some embodiments, the oxygen transfer efficiency acquisition module 220 may be used to acquire the current oxygen transfer efficiency in the water body. In some embodiments, the oxygen transfer efficiency acquisition module 220 may be used to acquire data collected by the oxygen transfer efficiency analyzer 5 .

[0055] In some embodiments, the air parameter determination module 230 may be used to determine the first target air parameter of the blower 4 based on the current oxygen transfer efficiency and the initial mapping relationship. In other embodiments, the air parameter determination module 230 may be used to determine the target air parameter of the blower 4 based on the current oxygen transfer efficiency and the target mapping relationship.

[0056] In some embodiments, the processor 200 may further include an alarm module 240. The alarm module 240 may be used to monitor the dissolved oxygen value of the water body during aeration, and execute an alarm operation in response to the dissolved oxygen value being lower than a first preset threshold or higher than a second preset threshold.

[0057] Figure 3 is an exemplary flow chart of an aeration control method according to some embodiments of the present specification.

[0058] like Figure 3 As shown, some embodiments of the present specification provide an oxygen capture dynamic DO aeration control method, and the process 300 of the aeration control method may include the following steps. In some embodiments, the process 300 can be executed by a processor (e.g., a processor of the control cabinet 1). For example, the process 300 can be implemented as an instruction set (e.g., an application) stored in a storage device such as the control cabinet 1, a memory outside the aeration control equipment 100 and accessible by the aeration control equipment 100. The processor can execute the instruction set, and when executing the instructions, it can be configured to execute the process 300. The operational diagram of the process 300 presented below is illustrative. In some embodiments, the process can be completed using one or more additional operations not described and / or one or more operations not discussed. In addition, Figure 3 The order in which the operations of flow 300 are illustrated and described below is not intended to be limiting.

[0059] Step 310 , determining an initial mapping relationship between the blast parameters and the oxygen transfer efficiency. In some embodiments, step 310 may be performed by the mapping relationship determination module 210 .

[0060] The initial mapping relationship between the blast parameters and the oxygen transfer efficiency refers to the mapping relationship between the blast parameters and the oxygen transfer efficiency obtained by the pre-operation debugging of the aeration control device 100 before the formal use. Figure 4 The initial mapping relationship between the air blast parameter and the oxygen transfer efficiency is determined by the process. The mapping relationship may be a one-to-one mapping relationship (i.e., there is a one-to-one correspondence between the air blast parameter and the oxygen transfer efficiency), and the mapping relationship may be represented by a curve, a function, a table, etc. In some embodiments, the initial mapping relationship between the air blast parameter and the oxygen transfer efficiency may be represented by a fitting curve, such as Figure 6 As shown, the blast parameter is used as the ordinate and the oxygen transfer efficiency is used as the abscissa, and the curve represents the initial mapping relationship, and each point on the curve is a set of mutually mapped blast parameters and oxygen transfer efficiencies. In some embodiments, the initial mapping relationship between the blast parameter and the oxygen transfer efficiency can be represented by a fitting function, and the function represents a one-to-one mapping between two sets of numbers (blast parameter and oxygen transfer efficiency). In some embodiments, the initial mapping relationship between the blast parameter and the oxygen transfer efficiency can be represented by making a table, for example, the first column in the table is the blast parameter, and the second column is the oxygen transfer efficiency, and the blast parameter and oxygen transfer efficiency on the same row are the mutual mapping values.

[0061] Step 320 , obtaining the current oxygen transfer efficiency in the water body. In some embodiments, step 320 may be performed by the oxygen transfer efficiency obtaining module 220 .

[0062] The water body may be a water body that has not been aerated (i.e., the water body before sewage treatment begins), the water body may be a water body at any time during the trial operation, and the water body may be a water body at any time during the formal operation.

[0063] In some embodiments, the current oxygen transfer efficiency may be the oxygen transfer efficiency of the aeration control equipment 100 at the beginning of the formal operation. In some embodiments, the current oxygen transfer efficiency may also be the oxygen transfer efficiency of the aeration control equipment 100 at a certain time point during the formal operation, and may be the value of the oxygen transfer efficiency actually collected by the oxygen transfer efficiency analyzer 5. In some embodiments, the current oxygen transfer efficiency may also be a representative value of the oxygen transfer efficiency of the aeration control equipment 100 during a certain preset time period (for example, within a second preset time length) during the formal operation, wherein the calculation method of the representative value is as follows. In some embodiments, the current oxygen transfer efficiency may also be a specific value in the oxygen transfer efficiency of the water body that is continuously obtained. For example, when the oxygen transfer efficiency changes significantly, the water body may be continuously aerated, and the representative value may be obtained after the oxygen transfer efficiency is relatively stable. For another example, after the aeration of the water body is completed, the oxygen transfer efficiency analyzer 5 may continuously monitor the oxygen transfer efficiency of the water body, and when the oxygen transfer efficiency in the water body changes beyond the preset monitoring range, the oxygen transfer efficiency at this time is used as the current oxygen transfer efficiency.

[0064] Step 330 : determining a first target blowing parameter of the blower 4 based on the current oxygen transfer efficiency and the initial mapping relationship. In some embodiments, step 330 may be performed by the blowing parameter determination module 230 .

[0065] The first target blast parameter refers to the mapping value of the current oxygen transfer efficiency on the initial mapping relationship. After the first target blast parameter is determined by the blast parameter determination module 230, the blast parameter of the blower 4 is adjusted to the first target blast parameter, so that the blower 4 aerates the aerobic pool 3 with the first target blast parameter.

[0066] In some embodiments, when the initial mapping relationship between the blast parameter and the oxygen transfer efficiency is expressed in the form of a fitting curve, the first target blast parameter can be obtained by picking points on the fitting curve; in some embodiments, when the initial mapping relationship between the blast parameter and the oxygen transfer efficiency is expressed in the form of a fitting function, the first target blast parameter can be obtained by calculating the fitting function; in some embodiments, when the initial mapping relationship between the blast parameter and the oxygen transfer efficiency is expressed in the form of a table, the first target blast parameter can be obtained by looking up a table. In some embodiments, the first target blast parameter can be obtained by removing points from the fitting curve, for example, Figure 6 In the figure, the initial mapping relationship between the blast parameters and the oxygen transfer efficiency is expressed as a fitting curve. When the current oxygen transfer efficiency is 20%, the mapping value on the initial mapping relationship is 300m 3 / min, that is, the first target blast parameter corresponding to the current oxygen transfer efficiency of 20% is 300m 3 / min.

[0067] The aeration control method can quickly respond to changes in microorganisms and water quality in the water body, and adjust the first target blowing parameter of the blower 4 based on the initial mapping relationship according to changes in the current oxygen transfer efficiency in the water body to ensure that an appropriate amount of oxygen enters the water body.

[0068] In some embodiments, after the blower 4 continuously delivers air to the aerobic pool 3 at the first target blowing parameters for a certain period of time (for example, a second preset time length), the current oxygen transfer efficiency in the water body can be obtained again (for example, step 320 is executed again), and then a new first target blowing parameter is determined based on the newly acquired current oxygen transfer efficiency and the initial mapping relationship (for example, step 330 is executed again), and then the blower 4 is adjusted again to continuously deliver air to the aerobic pool 3 at the new first target blowing parameter, and this cycle is repeated to ensure that the amount of oxygen delivered to the water body by the blower 4 is suitable for the oxygen demand of the water body.

[0069] In some embodiments, during the continuous aeration process of the blower 4 to the water body based on the first target blast parameter, the dissolved oxygen value of the water body during the aeration process can be monitored by the processor. A preset threshold value of the dissolved oxygen value is input into the storage device, and when the dissolved oxygen value in the water body is detected to be lower than the first preset threshold value or higher than the second preset threshold value, an alarm operation is performed. The dissolved oxygen value refers to molecular oxygen dissolved in water. The dissolved oxygen value is a basis for studying the self-purification ability of the water body, and can reflect the survival of microorganisms in the water body to a certain extent. If the dissolved oxygen in the water body is too low, it means that the water body is seriously polluted, the self-purification ability is weak, or even loses the self-purification ability. Therefore, the first preset threshold value of dissolved oxygen is preset in this embodiment. When the dissolved oxygen value in the water body is detected to be lower than the first preset threshold value, it indicates that the self-purification ability in the water body is too low. In some embodiments, during the operation of the aeration control equipment 100, the dissolved oxygen value in the water body can be monitored in real time by the alarm module 240, and a first preset threshold value is input in advance in the alarm module 240. When the dissolved oxygen value in the water body is detected to be lower than the first preset threshold value, the alarm module 240 performs an alarm operation so that the operator can intervene as soon as possible. In some embodiments, if the dissolved oxygen in the water body is too high, it means that the current self-purification capacity of the water body is strong and the dissolved oxygen demand is small. Therefore, the second preset threshold value of dissolved oxygen is preset in this embodiment. When the dissolved oxygen value in the water body is detected to be higher than the second preset threshold value, it means that the dissolved oxygen in the water body is too high. In some embodiments, during the operation of the aeration control equipment 100, the dissolved oxygen value in the water body can be monitored in real time by the warning module 240, and a second preset threshold value is input in advance in the warning module 240. When the dissolved oxygen value in the water body is detected to be higher than the second preset threshold value, the warning module 240 performs a warning operation. In some embodiments, the warning operation can include issuing a voice alarm, sending an alarm electronic message, automatically increasing the aeration amount of the blower 4, automatically reducing the aeration amount of the blower 4, etc.

[0070] In some embodiments, when the warning module 240 monitors in real time that the dissolved oxygen value in the water body is lower than the first preset threshold or higher than the second preset threshold, the warning module 240 sends a remote control signal to the blower 4. The blower 4 receives the signal to increase the blowing volume and supply a larger amount of air to the water body to ensure that the dissolved oxygen value increases and remains above the first preset threshold, or the blower 4 receives the signal to reduce the blowing volume and supply a smaller amount of air to the water body to ensure that the dissolved oxygen value decreases and remains below the second preset threshold. Then, the aeration control equipment 100 can continue to operate.

[0071] In some embodiments, the alarm module 240 monitors the dissolved oxygen value in the water body in real time to ensure on-site production safety, and the aeration control equipment 100 can respond quickly to various emergencies on site, such as a sudden increase in water volume, an instantaneous decrease in water volume, oil pollution interference, changes in sludge concentration caused by sludge discharge, etc.

[0072] Figure 4 It is an exemplary flow chart of a method for determining an initial mapping relationship in an aeration control method according to some embodiments of this specification.

[0073] In some embodiments, Figure 4 As shown, determining the initial mapping relationship between the blast parameters and the oxygen transfer efficiency (i.e., step 310) may include the following steps:

[0074] Step 311, obtain multiple calibrated oxygen transfer efficiencies after the water body is continuously aerated for a first preset time under multiple preset blast parameters. In some embodiments, the aeration control equipment 100 needs to be debugged before operation after installation, and multiple preset blast parameters are input to the blower 4, so that the aeration control equipment 100 aerates the water body, and records the value of the calibrated oxygen transfer efficiency corresponding to each preset blast parameter. In some embodiments, when the blower 4 is adjusted to a preset blast parameter, the water body is continuously aerated for a first preset time under the preset blast parameter, and the value of the calibrated oxygen transfer efficiency corresponding to the preset blast parameter is obtained. In some embodiments, the value of the calibrated oxygen transfer efficiency can be a representative value of the oxygen transfer efficiency within its aeration cycle. The aeration cycle here refers to the time period of the first preset time period during which the blower 4 continuously aerates the water body based on a preset blast parameter. In some embodiments, the representative value of the oxygen transfer efficiency refers to a more reasonable value (for example, an average value, a median, etc.) that can represent a certain aeration cycle. In some embodiments, the representative value of the oxygen transfer efficiency may be the median of multiple oxygen transfer efficiencies obtained in a certain aeration cycle. For each control cycle, the median of the values ​​of the oxygen transfer efficiency in the control cycle is taken as the final calibrated oxygen transfer efficiency. In some embodiments, the value of the calibrated oxygen transfer efficiency may also be the value of the oxygen transfer efficiency at the end of the aeration cycle.

[0075] In some embodiments, the blowing parameters may include blower air volume, blower frequency or blower power, and other parameters for controlling the operating state of the blower 4. The type of blowing parameters can be set according to the specific model of the blower 4 on site. For example, the blowing parameter may be the blower frequency, and the interval range between every two adjacent preset blowing parameters is ≥5Hz. For another example, the blowing parameter may be the blower power, and the interval range between every two adjacent preset blowing parameters is ≥10Kw. For another example, the blowing parameter may be the blower air volume, and the interval range between every two adjacent preset blowing parameters is ≥10m 3 In some embodiments, the interval range between every two adjacent blast parameters may be equal. In some embodiments, the interval range between every two adjacent blast parameters may be unequal (for example, a plurality of preset blast parameters are randomly set).

[0076] In some embodiments, the number of preset air blowing parameters can be set according to the specific model of the on-site air blower 4, the concentration of water pollutants, the activity of microorganisms, etc. The more the number of preset air blowing parameters is, the more calibrated oxygen transfer efficiencies can be obtained, and the higher the accuracy of the curve, function or table representing the initial mapping relationship that can be fitted, the more sufficient the reference data is when the aeration control device 100 is officially operated. In some embodiments, the number of preset air blowing parameters is at least 2. In some embodiments, the number of preset air blowing parameters can be greater than 10.

[0077] In some embodiments, the first preset duration can be set according to the specific model of the blower 4 on site, the concentration of water pollutants, the activity of microorganisms, etc. In some embodiments, the first preset duration can be 5 to 15 minutes. In some embodiments, the first preset duration can be 5 minutes, 8 minutes, 10 minutes or 15 minutes. In some embodiments, the first preset duration can also be other durations manually set according to site needs, such as 30 minutes, 60 minutes, 70 minutes or 80 minutes, etc.

[0078] In some embodiments, the calibrated oxygen transfer efficiency refers to a reference value of oxygen transfer efficiency in water obtained through debugging before the aeration control device 100 is officially put into operation. Through debugging, each preset aeration parameter obtains a corresponding calibrated oxygen transfer efficiency.

[0079] Step 312, determining an initial mapping relationship based on a plurality of preset air blast parameters and a plurality of calibrated oxygen transfer efficiencies. In some embodiments, during the debugging process of the aeration control device 100, the value of the calibrated oxygen transfer efficiency corresponding to each preset air blast parameter is recorded, and the initial mapping relationship between the air blast parameter and the oxygen transfer efficiency can be represented by curve fitting, function fitting or table making. In some embodiments, Figure 6As shown, the initial mapping relationship between the air blast parameter and the oxygen transfer efficiency can be represented by a fitting curve, wherein the ordinate represents the air blast parameter and the abscissa represents the oxygen transfer efficiency. After the initial mapping relationship between the air blast parameter and the oxygen transfer efficiency is determined, it can be input into a control module of the processor (e.g., a mapping relationship determination module 210), or stored in a storage device for the control module of the processor to retrieve.

[0080] It should be noted that the above description of process 300 is only for example and illustration, and does not limit the scope of application of this specification. For those skilled in the art, various modifications and changes can be made to process 300 under the guidance of this specification. However, these modifications and changes are still within the scope of this specification.

[0081] Figure 5 is another exemplary flow chart of the aeration control method according to some embodiments of the present specification.

[0082] In some embodiments, in order to continuously regulate the oxygen transfer efficiency in the water body, the present specification also provides a process 400 of an aeration control method. Figure 5 , the aeration control method process 400 may further include the following steps:

[0083] Step 410 , determining an initial mapping relationship between the blast parameters and the oxygen transfer efficiency. In some embodiments, step 410 may be performed by a processor or a mapping relationship determination module 210 .

[0084] Step 420 , obtaining the current oxygen transfer efficiency in the water body. In some embodiments, step 420 may be performed by the oxygen transfer efficiency obtaining module 220 .

[0085] Step 430 : determining a first target blowing parameter of the blower 4 based on the current oxygen transfer efficiency and the initial mapping relationship. In some embodiments, step 430 may be performed by the blowing parameter determination module 230 .

[0086] The above steps 410-430 are the same as the above steps 310-330, please see above for details and will not be repeated here.

[0087] Step 440: Continue to aerate the water body for a second preset time period based on the first target air blowing parameter.

[0088] In some embodiments, the second preset duration can be set according to the specific model of the on-site blower 4, the concentration of water pollutants, the activity of microorganisms, etc. In some embodiments, the second preset duration can be greater than or equal to 5 minutes. In some embodiments, the second preset duration can be 5 minutes, 8 minutes, 10 minutes, 15 minutes, 60 minutes, 80 minutes or 100 minutes, etc. In some embodiments, the second preset duration can be equal to the first preset duration. For example, the second preset duration and the first preset duration can be set to 10 minutes.

[0089] In some embodiments, the second preset time duration can be manually adjusted according to the progress of sewage treatment, for example, the parameters of the second preset time duration can be adjusted by a processor.

[0090] Step 450 , obtaining the actual oxygen transfer efficiency of the aerated water body. In some embodiments, step 450 may be performed by the oxygen transfer efficiency obtaining module 220 .

[0091] In some embodiments, the actual oxygen transfer efficiency refers to the oxygen transfer efficiency at a certain time point during the actual use of the aeration control equipment 100 on site, or a representative value of the oxygen transfer efficiency within a certain aeration cycle. The aeration cycle here refers to the time period of the second preset time length during which the blower 4 continuously aerates the water body based on the first target blowing parameter. The method for obtaining the actual oxygen transfer efficiency refers to the method for obtaining the calibrated oxygen transfer efficiency described above.

[0092] In some embodiments, the actual oxygen transfer efficiency and the oxygen transfer efficiency mapped by the first target blast parameter in the initial mapping relationship may be different, and therefore the following steps 460 to 470 are required to update the initial mapping relationship to adapt to changes in the water body.

[0093] Step 460 : determining a second target blowing parameter of the blower 4 based on the actual oxygen transfer efficiency and the initial mapping relationship. In some embodiments, step 460 may be performed by the blowing parameter determination module 230 .

[0094] In some embodiments, the second target blowing parameter refers to the mapping value of the actual oxygen transfer efficiency in the initial mapping relationship. The processor can input the obtained second target blowing parameter into the blower 4 as a subsequent control parameter of the blower 4, so that the blower 4 continues to aerate the water body with the second target blowing parameter for a second preset time to readjust the oxygen transfer efficiency in the water body. For example, in step 450, the actual oxygen transfer efficiency in the water body after aeration is obtained to be 18%; in step 460, based on the actual oxygen transfer efficiency of 18% and Figure 2 The initial mapping relationship shown determines that the second target blowing parameter of the blower 4 is 330m 3 / min. At this time, the second target blast parameter 330m 3 / min is used as a subsequent control parameter of the blower 4 to control the blower 4 to continuously aerate the water body for a second preset time period to obtain a new round of actual oxygen transfer efficiency, and this cycle is repeated to always determine the first target blowing parameter of the next round of the blower 4 based on the newly obtained actual oxygen transfer efficiency and the initial mapping relationship (if the initial mapping relationship has been updated, it is the updated initial mapping relationship).

[0095] Step 470 : updating the initial mapping relationship based on the actual oxygen transfer efficiency. In some embodiments, step 470 may be performed by the mapping relationship determination module 210 .

[0096] When the aeration control device 100 is officially in operation, the water body (microorganism status) in the aerobic pool 3 will constantly change due to environmental influences, such as rain, temperature changes, air pressure changes, and the state of the aeration head. The initial mapping relationship may not be suitable for the current water body. To solve this problem, during the official operation of the aeration control device 100, the initial mapping relationship is updated according to the actual oxygen transfer efficiency of the water body in the aerobic pool 3, so that the mapping relationship between the blast parameters and the oxygen transfer efficiency in the aeration control device 100 is more in line with the actual situation of the water body.

[0097] In some embodiments, updating the initial mapping relationship based on the actual oxygen transfer efficiency includes: updating the oxygen transfer efficiency mapping value of the first target blast parameter to the actual oxygen transfer efficiency. For example, in the above embodiment, step 440, based on the first target blast parameter being 300m 3 / min, continuously aerating the water body for a second preset time (e.g., 10 minutes); Step 450, obtaining an actual oxygen transfer efficiency of 18% in the water body after aeration; Step 460, based on the actual oxygen transfer efficiency of 18% and Figure 3 The initial mapping relationship shown determines the second target blowing parameter 330m of the blower 4 3 / min; Step 470, set the first target blast parameter to 300m 3 / min mapped oxygen transfer efficiency is updated to the actual oxygen transfer efficiency of 18%, which can be understood as Figure 6 The curve representing the mapping relationship is updated, and the updated mapping relationship is used as the initial mapping relationship of the next cycle to continue running, and this cycle is repeated. In some embodiments, step 460 is performed while step 470 is performed. In other embodiments, step 460 and step 470 can be performed sequentially.

[0098] It should be noted that the above description of process 400 is only for example and explanation, and does not limit the scope of application of this specification. For those skilled in the art, various modifications and changes can be made to process 400 under the guidance of this specification. However, these modifications and changes are still within the scope of this specification.

[0099] Figure 7 is an exemplary flow chart of an aeration control method according to other embodiments of the present specification.

[0100] like Figure 7 As shown, some other embodiments of the present specification provide an aeration control method, and the process 500 of the aeration control method may include the following steps. In some embodiments, the process 500 may be executed by a processor of the control cabinet 1 .

[0101] Step 510 , determining a target mapping relationship between the blast parameters and the oxygen transfer efficiency. In some embodiments, step 510 may be performed by the mapping relationship determination module 210 .

[0102] In some embodiments, the target mapping relationship refers to a steady-state correspondence between oxygen transfer efficiency and aeration parameters in the current water body.

[0103] In some embodiments, the mapping relationship determination module 210 may first obtain an initial mapping relationship between the blast parameter and the oxygen transfer efficiency, and then iteratively update the initial mapping relationship to determine a target mapping relationship.

[0104] For the method of obtaining the initial mapping relationship, please refer to the corresponding description above and will not be repeated here.

[0105] In some embodiments, the target mapping relationship is obtained by iteratively updating the initial mapping relationship. Iterative updating is a process of approximating the desired steady-state correspondence relationship through a feedback process. In iterative updating, the initial mapping relationship obtained during the trial run is used as the first iteration round, and the target mapping relationship obtained in each subsequent iteration round is used as the initial mapping relationship for the next iteration round. The specific method of iterative updating is described below. Figure 8 Description section.

[0106] Step 520, obtaining the current oxygen transfer efficiency in the water body. In some embodiments, step 520 may be performed by the oxygen transfer efficiency obtaining module 220. The current oxygen transfer efficiency is obtained in the manner described in the above step 450 for obtaining the actual oxygen transfer efficiency.

[0107] Step 530 : determining a target blowing parameter of the blower 4 based on the current oxygen transfer efficiency and the target mapping relationship. In some embodiments, step 530 may be performed by the blowing parameter determination module 230 .

[0108] The target blast parameter refers to the corresponding value of the current oxygen transfer efficiency in the target mapping relationship. After determining the target blast parameter of the blower 4, the processor of the control cabinet 1 can control the blower 4 to continuously aerate the water body based on the target blast parameter (for example, continuously aerate for a second preset time period) to maintain the oxygen transfer efficiency in the water body at the current oxygen transfer efficiency.

[0109] In some embodiments, the process 500 of the aeration control method may further include detection and warning of the dissolved oxygen value of the water body during the aeration process, for details, refer to the relevant description in the above process 300.

[0110] It should be noted that the above description of process 500 is only for example and explanation, and does not limit the scope of application of this specification. For those skilled in the art, various modifications and changes can be made to process 500 under the guidance of this specification. However, these modifications and changes are still within the scope of this specification.

[0111] Figure 8 It is an exemplary flow chart of iterative update of the aeration control method according to other embodiments of the present specification.

[0112] In some embodiments, iterative updating may refer to a process of repeatedly updating a mapping relationship through multiple rounds and finally determining a target mapping relationship. The iterative updating process 600 may include the following steps:

[0113] Step 610, obtaining the first oxygen transfer efficiency in the water body in the current iteration round.

[0114] In some embodiments, in each iteration round of mapping relationship update, the mapping relationship corresponding to the current iteration round can be referred to as the current mapping relationship. In some embodiments, the current mapping relationship is the mapping relationship to be updated in the current iteration round. In some embodiments, in the first round of iteration, the current mapping relationship can be the initial mapping relationship. In subsequent rounds of iterative updates, the current mapping relationship can be an updated mapping relationship obtained based on the previous round of iterations. The current iteration round can be understood as the first iteration round, and can also be understood as taking any iteration round as the current iteration round.

[0115] In some embodiments, the processor may obtain a first oxygen transfer efficiency in the water body in the current iteration round. The first oxygen transfer efficiency may be an oxygen transfer efficiency in the current iteration round when the air blowing parameters are not set, and the water body may not be in an aerated state at this time, or the water body may be in an aerated state set in the previous iteration round (i.e., a state of aeration based on the air blowing parameters set in the previous iteration round).

[0116] Step 620 : determining a first blowing parameter of the blower 4 based on the first oxygen transfer efficiency and the current mapping relationship of the current iteration round.

[0117] In some embodiments, in the current mapping relationship, the first oxygen transfer efficiency and the first blast parameter are mapped values ​​to each other, and the unique corresponding first blast parameter can be found from the current mapping relationship based on the first oxygen transfer efficiency.

[0118] Step 630, obtaining a second oxygen transfer efficiency after the water body is continuously aerated for a second preset time period under the first aeration parameters.

[0119] After determining the first blast parameter, the processor of the control cabinet 1 can control the blower 4 to aerate the water body based on the first blast parameter, and obtain the second oxygen transfer efficiency through the oxygen transfer efficiency acquisition module when the aeration continues for a second preset time.

[0120] Step 640: Determine a second blowing parameter of the blower 4 based on the second oxygen transfer efficiency and the current mapping relationship, wherein the second oxygen transfer efficiency is a mapping value of the second blowing parameter in the current mapping relationship.

[0121] Step 650, re-determine the mapping value of the first blast parameter as the second oxygen transfer efficiency to update the current mapping relationship. Through step 650, an update of the current mapping relationship in the current iteration round can be achieved. The updated mapping relationship is used as the current mapping relationship in step 620 of the next iteration round.

[0122] Step 660: Obtain a third oxygen transfer efficiency after the water body is continuously aerated for a second preset time period under the second aeration parameters, and use the third oxygen transfer efficiency as the first oxygen transfer efficiency for the next iteration round.

[0123] In this way, steps 610 to 660 are looped to obtain the steady-state correspondence required for approximation through continuous iterative updating to determine the target mapping relationship. In some embodiments, the iterative updating can be terminated based on the number of iterations reaching a preset number, and the current mapping relationship at the time of iteration termination is determined as the target mapping relationship. In some embodiments, the iterative updating can also be terminated based on the difference between the current mapping relationships in adjacent iterations being less than a preset threshold, and the current mapping relationship at the time of iteration termination is determined as the target mapping relationship.

[0124] In some embodiments, the oxygen capture dynamic DO aeration control method described in this specification can be executed locally, remotely, or in combination with local and remote execution.

[0125] It should be noted that the above description of the aeration control equipment and its equipment / modules is only for the convenience of description and does not limit the present application to the scope of the embodiments cited. It is understandable that for those skilled in the art, after understanding the principle of the equipment, it is possible to arbitrarily combine the various devices / modules, or constitute sub-equipment to connect with other devices / modules without deviating from this principle. For example, in some embodiments, the mapping relationship determination module 210 and the blast parameter determination module 230 can be different modules in a processor (for example, the processor of the control cabinet 1), or a module can implement the functions of the above two or more modules. For another example, each module can have its own storage module. For another example, each module can share a storage module. Variations such as these are all within the scope of protection of the present application.

[0126] The beneficial effects that may be brought about by the embodiments of this specification include but are not limited to: (1) Both aeration control methods proposed in this specification use the value of oxygen transfer efficiency for aeration control. This parameter can intuitively reflect the microorganisms and water quality status in the water body of the aerobic pool, and the aeration control effect is better and the energy saving effect is better; (2) By determining the initial mapping relationship between the blowing parameter and the oxygen transfer efficiency during the debugging stage, the blowing parameter can be directly determined according to the actual oxygen transfer efficiency based on the initial mapping relationship during the formal operation to control and adjust the blower; (3) During the formal operation, the blowing parameter and the corresponding oxygen transfer efficiency can be recorded in real time, and the mapping relationship between the blowing parameter and the oxygen transfer efficiency can be corrected (including step 470 and process 600 in this specification); (4) The dissolved oxygen value in the water body is monitored in real time by the warning module to ensure on-site production safety, and the aeration control equipment can respond quickly to various emergencies on site.

[0127] It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects that may be produced may be any one or a combination of the above, or any other beneficial effects that may be obtained.

[0128] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of this specification. Although not explicitly stated here, those skilled in the art may make various modifications, improvements and corrections to this specification. Such modifications, improvements and corrections are suggested in this specification, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of this specification.

[0129] At the same time, this specification uses specific words to describe the embodiments of this specification. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of this specification. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures or characteristics in one or more embodiments of this specification can be appropriately combined.

[0130] Similarly, it should be noted that in order to simplify the description disclosed in this specification and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this specification, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the subject matter of this specification are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0131] In some embodiments, the numerical parameters used in the specification and claims are approximate values, which may vary according to the characteristics required by individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining the digits. Although the numerical domains and parameters used to confirm the breadth of the range in some embodiments of this specification are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0132] Finally, it should be understood that the embodiments described in this specification are only used to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, as an example and not a limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly introduced and described in this specification.

Claims

1. An oxygen capture dynamic DO aeration control method, characterized in that: The aeration control method comprises: Determine an initial mapping relationship between air blast parameters and oxygen transfer efficiency, wherein the initial mapping relationship is a mapping relationship between the air blast parameters and the oxygen transfer efficiency obtained through pre-operation debugging before formal use; Get the current oxygen transfer efficiency in the water column; A first target blowing parameter of the blower is determined based on the current oxygen transfer efficiency and the initial mapping relationship.

2. The aeration control method according to claim 1, characterized in that: The determining of the initial mapping relationship between the blast parameters and the oxygen transfer efficiency comprises: Acquire a plurality of calibrated oxygen transfer efficiencies of the water body after continuous aeration for a first preset time period under a plurality of preset aeration parameters; The initial mapping relationship is determined based on the plurality of preset blast parameters and the plurality of calibrated oxygen transfer efficiencies.

3. The aeration control method according to claim 1, characterized in that: The aeration control method further comprises: continuously aerating the water body for a second preset time period based on the first target aeration parameter; Obtaining the actual oxygen transfer efficiency of the water body after aeration; A second target blowing parameter of the blower is determined based on the actual oxygen transfer efficiency and the initial mapping relationship.

4. The aeration control method according to claim 3, characterized in that: The aeration control method further comprises: The initial mapping relationship is updated based on the actual oxygen transfer efficiency.

5. The aeration control method according to claim 4, characterized in that: Updating the initial mapping relationship based on the actual oxygen transfer efficiency includes: The oxygen transfer efficiency mapping value of the first target blast parameter is updated to the actual oxygen transfer efficiency.

6. The aeration control method according to claim 1, characterized in that: The aeration control method further comprises: aerating the water body based on the first target aeration parameter; Monitoring dissolved oxygen values ​​in the water during aeration; In response to the dissolved oxygen value being lower than a first preset threshold or higher than a second preset threshold, a warning operation is performed.

7. The aeration control method according to claim 1, characterized in that: The determining of the first target blowing parameter of the blower based on the current oxygen transfer efficiency and the initial mapping relationship comprises: or When the initial mapping relationship between the air blast parameter and the oxygen transfer efficiency is expressed in a fitting curve, the first target air blast parameter is obtained by taking points on the fitting curve; or When the initial mapping relationship between the air blast parameter and the oxygen transfer efficiency is expressed in a fitting function, the first target air blast parameter is obtained by calculating the fitting function; or When the initial mapping relationship between the air blowing parameter and the oxygen transfer efficiency is expressed in a table, the first target air blowing parameter is obtained by using a table lookup method.

8. The aeration control method according to claim 2, characterized in that: The first preset time duration is set based on the specific model of the blower, the concentration of water pollutants, and the activity of microorganisms.

9. An oxygen capture dynamic DO aeration control equipment, characterized in that: It includes a control cabinet, an aeration pipeline, a blower and an oxygen transfer efficiency analyzer; the control cabinet and / or the oxygen transfer efficiency analyzer include one or more processors; the one or more processors include: A mapping relationship determination module, used to determine an initial mapping relationship between a blast parameter and an oxygen transfer efficiency, wherein the initial mapping relationship is a mapping relationship between the blast parameter and the oxygen transfer efficiency obtained through pre-operation debugging before formal use; An oxygen transfer efficiency acquisition module is used to acquire the current oxygen transfer efficiency in the water body; The blowing parameter determination module is used to determine a first target blowing parameter of the blower based on the current oxygen transfer efficiency and the initial mapping relationship.

10. The oxygen capture dynamic DO aeration control equipment according to claim 9, characterized in that: Also includes: The warning module is used to monitor the dissolved oxygen value of the water body during the aeration process, and execute a warning operation in response to when the dissolved oxygen value is lower than a first preset threshold or higher than a second preset threshold.

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