Pipeline type reclaimed water neutralization control method and system

Abstract

The invention discloses a pipeline type reclaimed water neutralization control method and system, which are applied to an intelligent environmental protection technology, and the method comprises the following steps: obtaining the water inflow of to-be-treated water of a pipeline type reclaimed water neutralization device as the total flow; distributing water to be treated to the first aeration loop and the second aeration loop according to a first efficiency function of the first aeration loop and a second efficiency function of the second aeration loop; and after the pipeline type reclaimed water neutralization device runs for a preset time length, recalibrating and updating the first efficiency function, and recalibrating and updating the second efficiency function. According to the invention, water to be treated can be effectively distributed into different aeration loops in the pipeline type reclaimed water neutralization device, so that the water to be treated in the aeration loops can be efficiently treated, and meanwhile, the accuracy of the distribution process can be ensured by recalibration of the aeration loops.

Description

Technical Field

[0001] The present invention relates to intelligent environmental protection technology, and particularly to a pipeline-type reclaimed water neutralization control method and system. Background Art

[0002] Wastewater generated by construction activities cannot be directly discharged into rivers or the ocean because it contains materials such as concrete, oil, and sand, so as not to pollute the ecological environment, such as water pollution and damage to the water ecosystem. Construction wastewater needs to be treated through special treatment facilities to meet the specified discharge standards before being discharged or reused. Currently, an important part of the treatment of this wastewater is to neutralize alkaline wastewater into neutral water, and neutralization with relatively inexpensive carbon dioxide has become a development trend in construction wastewater treatment technology. However, carbon dioxide is a greenhouse gas. When neutralizing construction wastewater with carbon dioxide, the aeration neutralization process usually needs to be carried out in a relatively closed environment for the recovery of carbon dioxide. At this time, the aeration neutralization efficiency has become the key point worthy of attention. Summary of the Invention

[0003] In order to at least overcome the above deficiencies in the prior art, the purpose of this application is to provide a pipeline-type reclaimed water neutralization control method and system.

[0004] In a first aspect, an embodiment of this application provides a pipeline-type reclaimed water neutralization control method, including:

[0005] Obtaining the inflow rate of the water to be treated by the pipeline-type reclaimed water neutralization device as the total flow rate; the pipeline-type reclaimed water neutralization device includes a first aeration circuit and a second aeration circuit;

[0006] Allocating the water to be treated to the first aeration circuit and the second aeration circuit according to a first efficiency function of the first aeration circuit and a second efficiency function of the second aeration circuit, and injecting a neutralization gas into the first aeration circuit according to the neutralization gas flow rate corresponding to the first efficiency function, and injecting a neutralization gas into the second aeration circuit according to the neutralization gas flow rate corresponding to the second efficiency function;

[0007] When the pipeline-type reclaimed water neutralization device runs for a preset duration, recalibrating and updating the first efficiency function, and recalibrating and updating the second efficiency function.

[0008] When the embodiment of this application is implemented, the pipeline-type reclaimed water neutralization device targeted is as Figure 1As shown in the figure, the in-line reclaimed water neutralization device includes a first aeration circuit, a second aeration circuit, a first inlet valve, a second inlet valve, a first inlet gas valve, a second inlet gas valve, a first outlet valve, and a second outlet valve; the water to be treated enters the first aeration circuit through the first inlet valve and enters the second aeration circuit through the second inlet valve; the neutralization gas enters the first aeration circuit through the first inlet gas valve and enters the second aeration circuit through the second inlet gas valve; the reclaimed water aerated and neutralized in the first aeration circuit is discharged through the first outlet valve, and the reclaimed water aerated and neutralized in the second aeration circuit is discharged through the second outlet valve. At this time, the water volume can be distributed to the two aeration circuits to achieve high-efficiency treatment of the water to be treated.

[0009] In the embodiment of the present application, the structures of the first aeration circuit and the second aeration circuit are as Figure 2 shown. It can adopt this setting method of curved pipes or other methods, and the embodiments of the present application do not make specific limitations. Since the first aeration circuit and the second aeration circuit are exactly the same even when leaving the factory, their aeration-related properties will change after being used for a period of time. Therefore, it is necessary to characterize the aeration efficiency of the first aeration circuit through a first efficiency function, and characterize the aeration efficiency of the second aeration circuit through a second efficiency function, which can be obtained through calibration. Based on the first efficiency function and the second efficiency function, an optimal distribution scheme can be calculated, so as to distribute the water to be treated to the first aeration circuit and the second aeration circuit for efficient treatment. At the same time, corresponding neutralization gas needs to be configured for different flow rates to achieve high-efficiency aeration treatment. In the embodiment of the present application, after the first aeration circuit and the second aeration circuit are used for a certain period of time, re-calibration is required to obtain new first and second efficiency functions to ensure the actual use efficiency. Through the above technical solutions, the embodiment of the present application can effectively distribute the water to be treated to different aeration circuits in the in-line reclaimed water neutralization device to achieve efficient treatment of the water to be treated in the aeration circuit, and the re-calibration of the aeration circuit can ensure the accuracy of the distribution process.

[0010] In a possible implementation manner, the calibration of the efficiency function includes:

[0011] Inject test water into the aeration circuit at the calibrated flow rate, inject neutralization gas into the aeration circuit, and record the pH value of the water flowing out of the aeration circuit;

[0012] When the pH value of the water flowing out of the aeration circuit reaches the lowest by adjusting the neutralization gas flow rate, record the current neutralization gas flow rate as the optimal gas flow rate corresponding to the current calibrated flow rate, record the current pH value and convert it into the dissolved amount of the neutralization gas to form the optimal dissolved amount corresponding to the current calibrated flow rate;

[0013] Obtain the optimal dissolution amounts of the multiple calibrated flows, and perform polynomial fitting on the calibrated flows and the corresponding optimal dissolution amounts to form an efficiency function; the input value of the efficiency function is the calibrated flow, and the output value of the efficiency function is the optimal dissolution amount.

[0014] In a possible implementation manner, allocating the water to be treated to the first aeration circuit and the second aeration circuit according to the first efficiency function of the first aeration circuit and the second efficiency function of the second aeration circuit includes:

[0015] Take the flow rate of the water to be treated allocated to the first aeration circuit as the first sub-flow rate, and take the flow rate of the water to be treated allocated to the second aeration circuit as the second sub-flow rate; the sum of the first flow rate and the second flow rate is the total flow rate;

[0016] Substitute the first sub-flow rate into the first efficiency function to form a first optimal dissolution amount, and substitute the second sub-flow rate into the second efficiency function to form a second optimal dissolution amount;

[0017] Multiply the first flow rate weight by the first optimal dissolution amount to form a first weighted dissolution amount, multiply the second flow rate weight by the second optimal dissolution amount to form a second weighted dissolution amount, and calculate the sum of the first weighted dissolution amount and the second weighted dissolution amount to form a total weighted dissolution amount; the first flow rate weight is the first sub-flow rate divided by the total flow rate; the second flow rate weight is the second sub-flow rate divided by the total flow rate;

[0018] Take the first sub-flow rate and the second sub-flow rate as unknowns, and solve for the first sub-flow rate and the second sub-flow rate with the maximum total weighted dissolution amount as the constraint;

[0019] Allocate the water to be treated with the solved first sub-flow rate to the first aeration circuit, and allocate the water to be treated with the solved second sub-flow rate to the second aeration circuit.

[0020] In a possible implementation manner, injecting neutralizing gas into the first aeration circuit according to the neutralizing gas flow rate corresponding to the first efficiency function, and injecting neutralizing gas into the second aeration circuit according to the neutralizing gas flow rate corresponding to the second efficiency function includes:

[0021] Inject the neutralizing gas with the optimal gas flow rate corresponding to the first sub-flow rate into the first aeration circuit, and inject the neutralizing gas with the optimal gas flow rate corresponding to the second sub-flow rate into the second aeration circuit.

[0022] In a possible implementation manner, the first efficiency function adopts the following formula:

[0023]

[0024] The second efficiency function is expressed by the following formula:

[0025]

[0026] Wherein, U1 is the first optimal dissolution amount, U2 is the second optimal dissolution amount, x1 is the first split flow rate, x2 is the second split flow rate, a i and b i are fitting coefficients, and i = 1, 2, 3, 4;

[0027] The total weighted dissolution amount is calculated by the following formula:

[0028]

[0029] Wherein, U max is the total weighted dissolution amount.

[0030] A pipeline-type reclaimed water neutralization control system includes:

[0031] An acquisition unit configured to acquire the water inflow of the water to be treated of a pipeline-type reclaimed water neutralization device as the total flow rate; the pipeline-type reclaimed water neutralization device includes a first aeration circuit and a second aeration circuit;

[0032] A calculation unit configured to distribute the water to be treated to the first aeration circuit and the second aeration circuit according to the first efficiency function of the first aeration circuit and the second efficiency function of the second aeration circuit, and inject neutralizing gas into the first aeration circuit according to the neutralizing gas flow rate corresponding to the first efficiency function, and inject neutralizing gas into the second aeration circuit according to the neutralizing gas flow rate corresponding to the second efficiency function;

[0033] A calibration unit configured to, when the pipeline-type reclaimed water neutralization device operates for a preset duration, recalibrate and update the first efficiency function and recalibrate and update the second efficiency function.

[0034] In a possible implementation manner, the calibration unit is further configured to:

[0035] Inject test water into the aeration circuit at a calibration flow rate, inject neutralizing gas into the aeration circuit, and record the pH value of the water flowing out of the aeration circuit;

[0036] When the pH value of the water flowing out of the aeration circuit reaches the lowest after adjusting the neutralizing gas flow rate, record the current neutralizing gas flow rate as the optimal gas flow rate corresponding to the current calibration flow rate, record the current pH value and convert it into the dissolution amount of the neutralizing gas to form the optimal dissolution amount corresponding to the current calibration flow rate;

[0037] Obtain the optimal dissolution amounts of the multiple calibrated flows, and perform polynomial fitting on the calibrated flow and the corresponding optimal dissolution amount to form an efficiency function; the input value of the efficiency function is the calibrated flow, and the output value of the efficiency function is the optimal dissolution amount.

[0038] In a possible implementation, the calculation unit is further configured to:

[0039] Take the flow rate of the water to be treated allocated to the first aeration circuit as the first sub-flow rate, and take the flow rate of the water to be treated allocated to the second aeration circuit as the second sub-flow rate; the sum of the first flow rate and the second flow rate is the total flow rate;

[0040] Substitute the first sub-flow rate into the first efficiency function to form a first optimal dissolution amount, and substitute the second sub-flow rate into the second efficiency function to form a second optimal dissolution amount;

[0041] Multiply the first flow rate weight by the first optimal dissolution amount to form a first weighted dissolution amount, multiply the second flow rate weight by the second optimal dissolution amount to form a second weighted dissolution amount, and calculate the sum of the first weighted dissolution amount and the second weighted dissolution amount to form a total weighted dissolution amount; the first flow rate weight is the first sub-flow rate divided by the total flow rate; the second flow rate weight is the second sub-flow rate divided by the total flow rate;

[0042] Take the first sub-flow rate and the second sub-flow rate as unknowns, and solve for the first sub-flow rate and the second sub-flow rate with the maximum total weighted dissolution amount as the constraint;

[0043] Allocate the water to be treated with the solved first sub-flow rate to the first aeration circuit, and allocate the water to be treated with the solved second sub-flow rate to the second aeration circuit.

[0044] In a possible implementation, the calculation unit is further configured to:

[0045] Inject the neutralizing gas with the optimal gas flow rate corresponding to the first sub-flow rate into the first aeration circuit, and inject the neutralizing gas with the optimal gas flow rate corresponding to the second sub-flow rate into the second aeration circuit.

[0046] In a possible implementation, the first efficiency function adopts the following formula:

[0047]

[0048] The second efficiency function adopts the following formula:

[0049]

[0050] Wherein, U1 is the first optimal dissolution amount, U2 is the second optimal dissolution amount, x1 is the first flow rate, x2 is the second flow rate, a i and b i are fitting coefficients, and i = 1, 2, 3, 4;

[0051] The total weighted dissolution amount is calculated by the following formula:

[0052]

[0053] Wherein, U max is the total weighted dissolution amount.

[0054] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0055] A pipeline-type reclaimed water neutralization control method and system of the present invention can effectively distribute the water to be treated into different aeration circuits in a pipeline-type reclaimed water neutralization device to achieve efficient treatment of the water to be treated in the aeration circuit. At the same time, recalibration of the aeration circuit can ensure the accuracy of the distribution process. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0057] Figure 1 is a schematic structural diagram of a pipeline-type reclaimed water neutralization device according to an embodiment of this application;

[0058] Figure 2 is a schematic structural diagram of a first aeration circuit and a second aeration circuit according to an embodiment of this application;

[0059] Figure 3 is a schematic diagram of method steps according to an embodiment of this application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0060] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. It should be understood that the accompanying drawings in this application are only for the purpose of illustration and description, and are not used to limit the protection scope of this application. In addition, it should be understood that the schematic drawings are not drawn to actual scale. The flowcharts used in this application illustrate the operations implemented according to some embodiments of the embodiments of this application. It should be understood that the operations in the flowchart may not be implemented in sequence, and steps without logical context may be reversed or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart or remove one or more operations from the flowchart under the guidance of the content of this application.

[0061] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all embodiments. The components of the embodiments of the present application generally described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0062] Please refer to Figure 3 , which is a schematic flow chart of a pipeline-type reclaimed water neutralization control method provided by an embodiment of the present invention. Further, the pipeline-type reclaimed water neutralization control method specifically may include the content described in the following steps S1 to S3.

[0063] S1: Obtain the inflow rate of the water to be treated of the pipeline-type reclaimed water neutralization device as the total flow rate; the pipeline-type reclaimed water neutralization device includes a first aeration circuit and a second aeration circuit;

[0064] S2: Distribute the water to be treated to the first aeration circuit and the second aeration circuit according to the first efficiency function of the first aeration circuit and the second efficiency function of the second aeration circuit, and inject neutralizing gas into the first aeration circuit according to the neutralizing gas flow rate corresponding to the first efficiency function, and inject neutralizing gas into the second aeration circuit according to the neutralizing gas flow rate corresponding to the second efficiency function;

[0065] S3: When the operation of the pipeline-type reclaimed water neutralization device reaches a preset duration, recalibrate and update the first efficiency function, and recalibrate and update the second efficiency function.

[0066] When the embodiments of the present application are implemented, the pipeline-type reclaimed water neutralization device targeted is as Figure 1 shown, wherein the pipeline-type reclaimed water neutralization device includes a first aeration circuit, a second aeration circuit, a first inlet valve, a second inlet valve, a first inlet gas valve, a second inlet gas valve, a first outlet valve, and a second outlet valve; the water to be treated enters the first aeration circuit through the first inlet valve and enters the second aeration circuit through the second inlet valve; the neutralizing gas enters the first aeration circuit through the first inlet gas valve and enters the second aeration circuit through the second inlet gas valve; the reclaimed water aerated and neutralized by the first aeration circuit is discharged through the first outlet valve, and the reclaimed water aerated and neutralized by the second aeration circuit is discharged through the second outlet valve. At this time, the water volume distribution of the two aeration circuits can be carried out to achieve high-efficiency treatment of the water to be treated.

[0067] In the embodiment of the present application, the structures of the first aeration circuit and the second aeration circuit are as Figure 2 shown. This can adopt the setting method of such bent pipelines, or other methods, which are not limited in detail in the embodiment of the present application. Since the first aeration circuit and the second aeration circuit are completely the same even when leaving the factory, their aeration-related properties will change after being used for a period of time. Therefore, it is necessary to characterize the aeration efficiency of the first aeration circuit through a first efficiency function, and characterize the aeration efficiency of the second aeration circuit through a second efficiency function, which can be obtained through calibration. Based on the first efficiency function and the second efficiency function, an optimal distribution scheme can be calculated, so as to distribute the water to be treated to the first aeration circuit and the second aeration circuit to achieve efficient treatment. At the same time, corresponding neutralizing gases need to be configured for different flow rates to achieve high-efficiency aeration treatment. In the embodiment of the present application, after the first aeration circuit and the second aeration circuit are used for a certain period of time, recalibration is required to obtain new first and second efficiency functions to ensure the actual use efficiency. Through the above technical solutions, the embodiment of the present application can effectively distribute the water to be treated to different aeration circuits in the pipeline-type reclaimed water neutralization device to achieve efficient treatment of the water to be treated in the aeration circuit, and the recalibration of the aeration circuit can ensure the accuracy of the distribution process.

[0068] In a possible implementation manner, the calibration of the efficiency function includes:

[0069] Inject test water into the aeration circuit at a calibrated flow rate, inject neutralizing gas into the aeration circuit, and record the pH value of the water flowing out of the aeration circuit;

[0070] When the pH value of the water flowing out of the aeration circuit reaches the lowest by adjusting the flow rate of the neutralizing gas, record the current flow rate of the neutralizing gas as the optimal gas flow rate corresponding to the current calibrated flow rate, record the current pH value and convert it into the dissolved amount of the neutralizing gas to form the optimal dissolved amount corresponding to the current calibrated flow rate;

[0071] Obtain the optimal dissolved amounts of multiple calibrated flow rates, and perform polynomial fitting on the calibrated flow rates and the corresponding optimal dissolved amounts to form an efficiency function; the input value of the efficiency function is the calibrated flow rate, and the output value of the efficiency function is the optimal dissolved amount.

[0072] When the embodiment of the present application is implemented, a specific method for calibrating the efficiency function is provided. The efficiency function herein refers to the first efficiency function or the second efficiency function, and the aeration circuit is the first aeration circuit or the second aeration circuit. During calibration, it is necessary to inject test water into the corresponding aeration circuit. The test water is generally preferably neutral pure water. The purpose of calibration is to ensure that as much neutralizing gas as possible is dissolved in the water. The neutralizing gas is generally preferably carbon dioxide. During the calibration process, while injecting the test water at the calibration flow rate, the neutralizing gas flow rate is adjusted until the pH value of the water flowing out of the aeration circuit reaches the lowest, indicating that the best efficiency is achieved at this time. The optimal gas flow rate is recorded, and at the same time, the calibration flow rate and the corresponding optimal dissolved amount are formed into a data pair. Generally speaking, the larger the calibration flow rate, the larger the corresponding optimal gas flow rate, and when the calibration flow rate reaches a certain level, the optimal dissolved amount will start to decrease, that is, the saturated dissolution of the neutralizing gas cannot be achieved. After testing multiple calibration flow rates, multiple data pairs can be obtained, and then a polynomial fitting is performed to form an efficiency function. Generally, a cubic fitting function or a logarithmic fitting function is preferably used to characterize the relationship between the increase in the calibration flow rate and the decrease in the optimal dissolved amount. The input value of the fitted efficiency function is the calibration flow rate, and the output value is the optimal dissolved amount.

[0073] In a possible implementation manner, distributing the water to be treated to the first aeration circuit and the second aeration circuit according to the first efficiency function of the first aeration circuit and the second efficiency function of the second aeration circuit includes:

[0074] Taking the flow rate of the water to be treated distributed to the first aeration circuit as the first sub-flow rate, and taking the flow rate of the water to be treated distributed to the second aeration circuit as the second sub-flow rate; the sum of the first flow rate and the second flow rate is the total flow rate;

[0075] Substituting the first sub-flow rate into the first efficiency function to form the first optimal dissolved amount, and substituting the second sub-flow rate into the second efficiency function to form the second optimal dissolved amount;

[0076] Multiplying the first flow rate weight by the first optimal dissolved amount to form the first weighted dissolved amount, multiplying the second flow rate weight by the second optimal dissolved amount to form the second weighted dissolved amount, and calculating the sum of the first weighted dissolved amount and the second weighted dissolved amount to form the total weighted dissolved amount; the first flow rate weight is the first sub-flow rate divided by the total flow rate; the second flow rate weight is the second sub-flow rate divided by the total flow rate;

[0077] Taking the first sub-flow rate and the second sub-flow rate as unknowns, and solving the first sub-flow rate and the second sub-flow rate with the maximum total weighted dissolved amount as the constraint;

[0078] Distribute the water to be treated with the obtained first flow rate to the first aeration circuit, and distribute the water to be treated with the obtained second flow rate to the second aeration circuit.

[0079] When the embodiment of the present application is implemented, when distributing the water to be treated, the first flow rate and the second flow rate need to be used as unknowns, and the sum of the first flow rate and the second flow rate is the total flow rate. At the same time, the ratio of the first flow rate to the total flow rate is used as the first flow rate weight, and the ratio of the second flow rate to the total flow rate is used as the second flow rate weight. In the calculation, it is necessary to calculate the first weighted dissolution amount and the second weighted dissolution amount. It should be understood that the first weighted dissolution amount is a function with the first flow rate as the unknown, and the second weighted dissolution amount is a function with the second flow rate as the unknown. By maximizing the total weighted dissolution amount, the first flow rate and the second flow rate can be calculated. At this time, the water to be treated with the first flow rate can be distributed to the first aeration circuit, and the water to be treated with the second flow rate can be distributed to the second aeration circuit to optimize the efficiency.

[0080] In a possible implementation manner, injecting neutralizing gas into the first aeration circuit according to the neutralizing gas flow rate corresponding to the first efficiency function, and injecting neutralizing gas into the second aeration circuit according to the neutralizing gas flow rate corresponding to the second efficiency function includes:

[0081] Inject the neutralizing gas with the optimal gas flow rate corresponding to the first flow rate into the first aeration circuit, and inject the neutralizing gas with the optimal gas flow rate corresponding to the second flow rate into the second aeration circuit.

[0082] When the embodiment of the present application is implemented, during the calibration process, each calibration flow rate will correspond to an optimal gas flow rate. At this time, for the first flow rate, the optimal gas flow rate that best matches it can be found. That is, if there is a calibration flow rate equal to the first flow rate, inject the optimal gas flow rate corresponding to this calibration flow rate into the first aeration circuit. If there is no calibration flow rate equal to the first flow rate, then use the optimal gas flow rate that is greater than this first flow rate and closest to this first flow rate as the selected optimal gas flow rate and inject it into the first aeration circuit. If there is a calibration flow rate equal to the second flow rate, inject the optimal gas flow rate corresponding to this calibration flow rate into the second aeration circuit. If there is no calibration flow rate equal to the second flow rate, then use the optimal gas flow rate that is greater than this second flow rate and closest to this second flow rate as the selected optimal gas flow rate and inject it into the second aeration circuit to maximize the efficiency.

[0083] In a possible implementation manner, the first efficiency function adopts the following formula:

[0084]

[0085] The second efficiency function adopts the following formula:

[0086]

[0087] In the formula, U1 is the first optimal dissolution amount, U2 is the second optimal dissolution amount, x1 is the first flow rate, x2 is the second flow rate, a i and b i are fitting coefficients, and i = 1, 2, 3, 4;

[0088] The total weighted dissolution amount is calculated by the following formula:

[0089]

[0090] In the formula, U max is the total weighted dissolution amount.

[0091] When the embodiment of the present application is implemented, a specific efficiency function and total weighted dissolution amount are provided. In the total weighted dissolution amount, x1 + x2 is the total flow rate. At the same time, the first flow rate can be expressed as the total flow rate minus the second flow rate, or the second flow rate can be expressed as the total flow rate minus the first flow rate to form a quartic function of one variable, and then the maximum value is solved.

[0092] A pipeline-type reclaimed water neutralization control system includes:

[0093] An acquisition unit configured to acquire the water inflow of the water to be treated by the pipeline-type reclaimed water neutralization device as the total flow rate; the pipeline-type reclaimed water neutralization device includes a first aeration circuit and a second aeration circuit;

[0094] A calculation unit configured to distribute the water to be treated to the first aeration circuit and the second aeration circuit according to the first efficiency function of the first aeration circuit and the second efficiency function of the second aeration circuit, and inject neutralizing gas into the first aeration circuit according to the neutralizing gas flow rate corresponding to the first efficiency function, and inject neutralizing gas into the second aeration circuit according to the neutralizing gas flow rate corresponding to the second efficiency function;

[0095] A calibration unit configured to, when the pipeline-type reclaimed water neutralization device operates for a preset duration, recalibrate and update the first efficiency function and recalibrate and update the second efficiency function.

[0096] In a possible implementation manner, the calibration unit is further configured to:

[0097] Inject test water into the aeration circuit at a calibrated flow rate, inject neutralizing gas into the aeration circuit, and record the pH value of the water flowing out of the aeration circuit;

[0098] Adjust the neutralizing gas flow rate until the pH value of the water flowing out of the aeration circuit reaches the lowest. Record the current neutralizing gas flow rate as the optimal gas flow rate corresponding to the current calibration flow rate, record the current pH value, and convert it into the dissolved amount of the neutralizing gas to form the optimal dissolved amount corresponding to the current calibration flow rate.

[0099] Obtain the optimal dissolved amounts for multiple calibration flow rates, and perform polynomial fitting on the calibration flow rates and the corresponding optimal dissolved amounts to form an efficiency function; the input value of the efficiency function is the calibration flow rate, and the output value of the efficiency function is the optimal dissolved amount.

[0100] In a possible implementation, the calculation unit is further configured to:

[0101] Take the flow rate of the water to be treated allocated to the first aeration circuit as the first sub-flow rate, and take the flow rate of the water to be treated allocated to the second aeration circuit as the second sub-flow rate; the sum of the first flow rate and the second flow rate is the total flow rate.

[0102] Substitute the first sub-flow rate into the first efficiency function to form the first optimal dissolved amount, and substitute the second sub-flow rate into the second efficiency function to form the second optimal dissolved amount.

[0103] Multiply the first flow rate weight by the first optimal dissolved amount to form the first weighted dissolved amount, multiply the second flow rate weight by the second optimal dissolved amount to form the second weighted dissolved amount, and calculate the sum of the first weighted dissolved amount and the second weighted dissolved amount to form the total weighted dissolved amount; the first flow rate weight is the first sub-flow rate divided by the total flow rate; the second flow rate weight is the second sub-flow rate divided by the total flow rate.

[0104] Take the first sub-flow rate and the second sub-flow rate as unknowns, and solve for the first sub-flow rate and the second sub-flow rate with the maximum total weighted dissolved amount as the constraint.

[0105] Allocate the water to be treated with the solved first sub-flow rate to the first aeration circuit, and allocate the water to be treated with the solved second sub-flow rate to the second aeration circuit.

[0106] In a possible implementation, the calculation unit is further configured to:

[0107] Inject the neutralizing gas with the optimal gas flow rate corresponding to the first sub-flow rate into the first aeration circuit, and inject the neutralizing gas with the optimal gas flow rate corresponding to the second sub-flow rate into the second aeration circuit.

[0108] In a possible implementation, the first efficiency function is expressed by the following formula:

[0109]

[0110] The second efficiency function adopts the following formula:

[0111]

[0112] In the formula, U1 is the first optimal dissolution amount, U2 is the second optimal dissolution amount, x1 is the first flow rate, x2 is the second flow rate, a i and b i are fitting coefficients, and i = 1, 2, 3, 4;

[0113] The total weighted dissolution amount is calculated by the following formula:

[0114]

[0115] In the formula, U max is the total weighted dissolution amount.

[0116] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0117] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed couplings or direct couplings or communication connections to each other can be indirect couplings or communication connections through some interfaces, devices or units, and can also be electrical, mechanical or other forms of connection.

[0118] The unit described as a separating component may or may not be physically separated. Obviously, those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this article can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0119] In addition, the functional units in each embodiment of the present invention can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0120] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a grid device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0121] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pipeline reclaimed water neutralization control method, characterized in that: include: The inflow of the water to be treated in the pipeline type reclaimed water neutralization device is obtained as the total flow rate; the pipeline type reclaimed water neutralization device comprises a first aeration circuit and a second aeration circuit; Distributing the water to be treated to the first aeration circuit and the second aeration circuit according to a first efficiency function of the first aeration circuit and a second efficiency function of the second aeration circuit, injecting neutralizing gas into the first aeration circuit according to a neutralizing gas flow rate corresponding to the first efficiency function, and injecting neutralizing gas into the second aeration circuit according to a neutralizing gas flow rate corresponding to the second efficiency function; When the pipeline-type regenerated water neutralization device has been running for a preset time, the first efficiency function is recalibrated and updated, and the second efficiency function is recalibrated and updated.

2. A pipeline reclaimed water neutralization control method according to claim 1, characterized in that: The calibration of the efficiency function includes: Inject test water into the aeration loop at a calibrated flow rate, inject neutralizing gas into the aeration loop, and record the pH value of the water flowing out of the aeration loop; Adjust the neutralizing gas flow rate until the pH value of the water flowing out of the aeration loop reaches the lowest, record the current neutralizing gas flow rate as the optimal gas flow rate corresponding to the current calibration flow rate, record the current pH value and convert it into the dissolved amount of the neutralizing gas to form the optimal dissolved amount corresponding to the current calibration flow rate; The optimal dissolution amount of multiple calibrated flow rates is obtained, and the calibrated flow rate and the corresponding optimal dissolution amount are subjected to polynomial fitting to form an efficiency function; the input value of the efficiency function is the calibrated flow rate, and the output value of the efficiency function is the optimal dissolution amount.

3. A pipeline reclaimed water neutralization control method according to claim 2, characterized in that: Distributing the water to be treated to the first aeration circuit and the second aeration circuit according to the first efficiency function of the first aeration circuit and the second efficiency function of the second aeration circuit comprises: The flow rate of the water to be treated distributed to the first aeration circuit is used as a first sub-flow rate, and the flow rate of the water to be treated distributed to the second aeration circuit is used as a second sub-flow rate; the sum of the first flow rate and the second flow rate is the total flow rate; Substituting the first sub-flow rate into the first efficiency function to form a first optimal dissolution amount, and substituting the second sub-flow rate into the second efficiency function to form a second optimal dissolution amount; The first flow weight is multiplied by the first optimal dissolution amount to form a first weighted dissolution amount, the second flow weight is multiplied by the second optimal dissolution amount to form a second weighted dissolution amount, and the sum of the first weighted dissolution amount and the second weighted dissolution amount is calculated to form a total weighted dissolution amount; the first flow weight is the first sub-flow divided by the total flow; the second flow weight is the second sub-flow divided by the total flow; The first sub-flow rate and the second sub-flow rate are taken as unknowns, and the maximum total weighted dissolved amount is used as a constraint to solve the first sub-flow rate and the second sub-flow rate; The first sub-flow rate of the water to be treated obtained by solving the problem is distributed to the first aeration circuit, and the second sub-flow rate of the water to be treated obtained by solving the problem is distributed to the second aeration circuit.

4. A pipeline reclaimed water neutralization control method according to claim 3, characterized in that: Injecting neutralizing gas into the first aeration loop according to the neutralizing gas flow rate corresponding to the first efficiency function, and injecting neutralizing gas into the second aeration loop according to the neutralizing gas flow rate corresponding to the second efficiency function comprises: The neutralizing gas of the optimal gas flow rate corresponding to the first sub-flow rate is injected into the first aeration circuit, and the neutralizing gas of the optimal gas flow rate corresponding to the second sub-flow rate is injected into the second aeration circuit.

5. A pipeline reclaimed water neutralization control method according to claim 3, characterized in that: The first efficiency function adopts the following formula: The second efficiency function adopts the following formula: Wherein, U1 is the first optimal dissolution amount, U2 is the second optimal dissolution amount, x1 is the first sub-flow rate, x2 is the second sub-flow rate, a i and b i is the fitting coefficient, i=1,2,3,4; The total weighted dissolved amount is calculated using the following formula: Where U max is the total weighted dissolved amount.

6. A pipeline reclaimed water neutralization control system, characterized in that: include: An acquisition unit is configured to acquire the inflow of the water to be treated of the pipeline-type reclaimed water neutralization device as a total flow rate; The pipeline type regenerated water neutralization device comprises a first aeration loop and a second aeration loop; a calculation unit configured to distribute the water to be treated to the first aeration circuit and the second aeration circuit according to a first efficiency function of the first aeration circuit and a second efficiency function of the second aeration circuit, and to inject neutralizing gas into the first aeration circuit according to a neutralizing gas flow rate corresponding to the first efficiency function, and to inject neutralizing gas into the second aeration circuit according to a neutralizing gas flow rate corresponding to the second efficiency function; The calibration unit is configured to recalibrate and update the first efficiency function and recalibrate and update the second efficiency function after the pipeline-type regenerated water neutralization device has been running for a preset time.

7. A pipeline reclaimed water neutralization control system according to claim 6, characterized in that: The calibration unit is further configured to: Inject test water into the aeration loop at a calibrated flow rate, inject neutralizing gas into the aeration loop, and record the pH value of the water flowing out of the aeration loop; Adjust the neutralizing gas flow rate until the pH value of the water flowing out of the aeration loop reaches the lowest, record the current neutralizing gas flow rate as the optimal gas flow rate corresponding to the current calibration flow rate, record the current pH value and convert it into the dissolved amount of the neutralizing gas to form the optimal dissolved amount corresponding to the current calibration flow rate; The optimal dissolution amount of multiple calibrated flow rates is obtained, and the calibrated flow rate and the corresponding optimal dissolution amount are subjected to polynomial fitting to form an efficiency function; the input value of the efficiency function is the calibrated flow rate, and the output value of the efficiency function is the optimal dissolution amount.

8. A pipeline reclaimed water neutralization control system according to claim 6, characterized in that: The computing unit is further configured to: The flow rate of the water to be treated distributed to the first aeration circuit is used as a first sub-flow rate, and the flow rate of the water to be treated distributed to the second aeration circuit is used as a second sub-flow rate; the sum of the first flow rate and the second flow rate is the total flow rate; Substituting the first sub-flow rate into the first efficiency function to form a first optimal dissolution amount, and substituting the second sub-flow rate into the second efficiency function to form a second optimal dissolution amount; The first flow weight is multiplied by the first optimal dissolution amount to form a first weighted dissolution amount, the second flow weight is multiplied by the second optimal dissolution amount to form a second weighted dissolution amount, and the sum of the first weighted dissolution amount and the second weighted dissolution amount is calculated to form a total weighted dissolution amount; the first flow weight is the first sub-flow divided by the total flow; the second flow weight is the second sub-flow divided by the total flow; The first sub-flow rate and the second sub-flow rate are taken as unknowns, and the maximum total weighted dissolved amount is used as a constraint to solve the first sub-flow rate and the second sub-flow rate; The first sub-flow rate of the water to be treated obtained by solving the problem is distributed to the first aeration circuit, and the second sub-flow rate of the water to be treated obtained by solving the problem is distributed to the second aeration circuit.

9. A pipeline reclaimed water neutralization control system according to claim 8, characterized in that: The computing unit is further configured to: The neutralizing gas of the optimal gas flow rate corresponding to the first sub-flow rate is injected into the first aeration circuit, and the neutralizing gas of the optimal gas flow rate corresponding to the second sub-flow rate is injected into the second aeration circuit.

10. The pipeline reclaimed water neutralization control system according to claim 8, characterized in that: The first efficiency function adopts the following formula: The second efficiency function adopts the following formula: Wherein, U1 is the first optimal dissolution amount, U2 is the second optimal dissolution amount, x1 is the first sub-flow rate, x2 is the second sub-flow rate, a i and b i is the fitting coefficient, i=1,2,3,4; The total weighted dissolved amount is calculated using the following formula: Where U max is the total weighted dissolved amount.

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