A method of oxygen level regulation control and related apparatus

Abstract

The application discloses an oxygen amount adjusting control method and related device, comprising: obtaining oxygen amount concentration information and flow information in a pipeline; calculating according to the oxygen amount concentration information, the flow information and preset concentration information in the pipeline, according to a preset PID control strategy, to obtain the opening of an oxygen amount adjusting valve, and controlling the oxygen amount adjusting valve according to the opening of the oxygen amount adjusting valve, so that the method and the related device can realize accurate control of water oxygenation.

Description

Technical Field

[0001] This invention belongs to the field of DC evaporator nuclear power units and relates to an oxygen regulation and control method and related devices. Background Technology

[0002] High-temperature gas-cooled reactors, sodium-cooled fast reactors, and small modular reactors (SMRs) are all direct-flow steam generator nuclear power units. Oxygenation of feedwater can inhibit flow-accelerated corrosion in the feedwater system. The main oxygenation methods are gaseous oxygenation, liquid oxygenation, and demineralized water oxygenation. Demineralized water oxygenation is more suitable for direct-flow steam generator nuclear power units. Demineralized water oxygenation utilizes the fact that demineralized water at standard atmospheric pressure contains saturated oxygen, with a content of about 8000 μg / L. Adding demineralized water with saturated dissolved oxygen to the system requires certain algorithms and logic control to ensure that the oxygen content at the deaerator inlet and evaporator inlet is within the acceptable range.

[0003] The existing demineralized water oxygenation control technology for direct-flow evaporator nuclear power units (such as high-temperature gas-cooled reactors, sodium-cooled fast reactors, and small modular reactors) has the following defects and shortcomings, which need to be addressed: The problem of delayed response to flow fluctuations: Existing technologies mostly use PID closed-loop control alone. When the flow of condensate or feedwater fluctuates, PID control needs to rely on the logic of "deviation feedback - step-by-step correction". The response delay is long, which can easily cause the oxygen concentration at the deaerator inlet or evaporator inlet to exceed the qualified range in a short period of time, increasing the risk of accelerated corrosion in the feedwater system.

[0004] Lack of coordinated control between the two oxygenation points: The condensate oxygenation point (condensate pump inlet) and the feedwater oxygenation point (deaerator downcomer) of the unit are responsible for the oxygen concentration regulation of different links, but the existing method has not established a coordinated control logic between the two, which is prone to contradictions such as "excessive oxygenation of condensate + insufficient oxygenation of feedwater" or vice versa, resulting in poor overall oxygen concentration stability of the system.

[0005] The oxygen regulating valve has insufficient adjustment accuracy: the existing control method does not combine historical concentration data (previous moment, previous moment) for differential correction, and only adjusts the valve opening based on the current concentration deviation, which is prone to "overshooting". In addition, there is no flow feedforward compensation, and the valve opening does not match the actual required demineralized water flow.

[0006] Considering the above issues, accurate control of water oxygenation is not yet possible. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide an oxygen regulation and control method and related device, which can achieve accurate control of water oxygenation.

[0008] To achieve the above objectives, the present invention discloses an oxygen regulation and control method, comprising: Obtain oxygen concentration and flow rate information within the pipeline; Based on the oxygen concentration information, flow information, and preset concentration information in the pipeline, the opening degree of the oxygen regulating valve is calculated according to the preset PID control strategy, and the oxygen regulating valve is controlled according to the opening degree of the oxygen regulating valve.

[0009] Furthermore, the process of calculating the opening degree of the oxygen regulating valve based on the oxygen concentration information, flow rate information, and preset concentration information in the pipeline, according to a preset PID control strategy, is as follows: The oxygen concentration difference is calculated based on the oxygen concentration information and the preset oxygen concentration information. The increase in the opening of the oxygen regulating valve is obtained by performing PID+feedforward calculation based on the oxygen concentration difference and the main pipe flow rate. Calculate the opening degree of the oxygen regulating valve at the next moment based on the increase in the opening degree of the oxygen regulating valve and the current valve opening degree.

[0010] Furthermore, the process of obtaining the increase in the opening of the oxygen regulating valve by performing PID+feedforward calculation based on the oxygen concentration difference and the main pipe flow rate is as follows: Multiply the current oxygen concentration difference by a preset proportional parameter to obtain the calculated proportional value; Multiply the current oxygen concentration difference by the preset integration parameter to obtain the integral value; Subtract three times the oxygen concentration difference of the previous moment from the current oxygen concentration difference, add the current oxygen concentration difference, and then multiply by the preset differential parameter to obtain the differential calculation value. The current main pipe flow rate is used to calculate the current oxygen regulating valve user main pipe flow rate feedforward calculation value by performing a function calculation on the current main pipe flow rate value. The proportional, integral, and differential calculation values, along with the user's main pipe flow feedforward calculation value, are added together to obtain the oxygen control valve opening increment.

[0011] Furthermore, the opening degree of the oxygen regulating valve is increased. for:

[0012] in, This represents the difference in oxygen concentration at the current moment. This represents the difference in oxygen concentration between the previous and next time steps. This represents the difference in oxygen concentration between the previous and next moments. This is a preset proportional parameter; Preset differential parameters; This is the feedforward function for user bus flow.

[0013] Furthermore, the pipeline is a condensate main pipe or a water supply main pipe.

[0014] Furthermore, it also includes: The pipeline flow is continuously sampled by a flow transmitter. When the flow fluctuation exceeds 20% within three consecutive sampling periods, the system automatically switches to feedforward control mode to prioritize suppressing the impact of flow disturbances on oxygen concentration.

[0015] This invention discloses an oxygen regulation and control system, comprising: The acquisition module is used to acquire oxygen concentration and flow information within the pipeline. The control module is used to calculate the opening degree of the oxygen regulating valve according to the oxygen concentration information, flow information and preset concentration information in the pipeline and according to the preset PID control strategy, and control the oxygen regulating valve according to the opening degree of the oxygen regulating valve.

[0016] Furthermore, the control module includes: The first calculation unit is used to calculate the oxygen concentration difference based on the oxygen concentration information and the preset oxygen concentration information. The second calculation unit is used to perform PID+feedforward calculations based on the oxygen concentration difference and the main pipe flow rate to obtain the increase in the opening of the oxygen regulating valve. The third calculation unit is used to calculate the opening of the oxygen regulating valve at the next moment based on the increase in the opening of the oxygen regulating valve and the current valve opening.

[0017] The present invention discloses a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the oxygen regulation and control method.

[0018] The present invention discloses a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the oxygen regulation and control method.

[0019] The present invention has the following beneficial effects: In practical operation, the oxygen regulation and control method and related device described in this invention control the opening degree of the oxygen regulating valve based on oxygen concentration information, flow rate information, preset concentration information and PID control strategy, thereby achieving accurate control of water oxygenation. The operation is simple and highly practical. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart of the method of the present invention; Figure 2 This is a flowchart for step 2); Figure 3 The flowchart for step 22); Figure 4 This is a schematic diagram of the system structure and process; Figure 5 A flowchart of the oxygen regulating valve control method; Figure 6 This is a flowchart of the recirculation control valve control method. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0024] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0025] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this invention generally indicates that the preceding and following objects have an "or" relationship.

[0026] It should be understood that although terms such as first, second, third, etc., may be used in the embodiments of the present invention to describe the preset range, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from one another. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0027] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0030] Example 1 refer to Figure 1 The oxygen regulation and control method of the present invention includes the following steps: 1) Obtain the oxygen concentration information detected by the oxygen concentration transmitter on the user's pipeline.

[0031] 2) Control the opening degree of the oxygen regulating valve based on oxygen concentration information, flow rate information, preset concentration information and PID control strategy.

[0032] According to the oxygen control method provided in the embodiments of the present invention, oxygen concentration is controlled by controlling an oxygen regulating valve in the system pipeline, and an oxygen concentration sensor is set to measure the oxygen concentration information of the user system pipeline. Based on the measured oxygen concentration information and preset oxygen concentration information, the calculated value of the valve opening of the oxygen regulating valve is obtained according to a preset PID control strategy, thereby adjusting the output oxygen-enriched solution flow rate, which can quickly and effectively stabilize the oxygen content of the user pipeline within a preset range.

[0033] refer to Figure 2 In this embodiment, step 2) is specifically performed as follows: 21) Calculate the oxygen concentration difference based on the oxygen concentration information and the preset oxygen concentration information; 22) Perform PID+feedforward calculations based on the oxygen concentration difference and the main pipe flow rate to obtain the increase in the opening of the oxygen regulating valve; 23) Calculate the opening of the oxygen regulating valve at the next moment based on the increase in the opening of the oxygen regulating valve and the current valve opening.

[0034] In this embodiment, the oxygen concentration difference is calculated based on the measured oxygen concentration information and the preset oxygen concentration information. Then, proportional, differential, and integral calculations are performed based on the oxygen concentration difference to obtain the valve opening increment of the oxygen regulating valve. The valve opening at the next moment is determined by combining the current valve opening of the oxygen regulating valve. This makes the adjustment of the oxygen regulating valve opening more accurate and in line with the changes in oxygen concentration, and can effectively control the oxygen concentration in the user's pipeline.

[0035] Reference Figure 3 In this embodiment, the oxygen concentration information includes the oxygen concentration information at the current moment, the oxygen concentration information at the previous moment, and the oxygen concentration information at the moment before that; the oxygen concentration difference includes the oxygen concentration difference at the current moment, the oxygen concentration difference at the previous moment, and the oxygen concentration difference at the moment before that; the oxygen concentration difference at the current moment is obtained by subtracting the preset oxygen concentration information from the oxygen concentration information at the current moment, the oxygen concentration difference at the previous moment is obtained by subtracting the preset oxygen concentration information from the oxygen concentration information at the previous moment, and the oxygen concentration difference at the moment before that is obtained by subtracting the preset oxygen concentration information from the oxygen concentration information at the moment before that; The process of obtaining the increase in the control valve opening by performing PID+feedforward calculation based on the oxygen concentration difference and the main pipe flow rate is as follows: 221) Multiply the current oxygen concentration difference by a preset proportional parameter to obtain the calculated proportional value; when the oxygen concentration deviation... e [ n ]>3 μg / L When, proportional parameter KAutomatically switches to version 1.0 to speed up deviation correction.

[0036] 222) Multiply the difference in oxygen concentration at the current moment by the preset integration parameter to obtain the calculated value of the integral; 223) Subtract three times the oxygen concentration difference from the previous moment from the current oxygen concentration difference, add the current oxygen concentration difference, and then multiply by the preset differential parameter to obtain the differential value; if e [ n 1] or e [ n 2] If missing (e.g., during system startup), then use e [ n [Replacement] to avoid computational interruption.

[0037] 224) Calculate the feedforward increment of the control valve opening at the current moment by performing a function on the current main pipe flow rate value; 225) Add the proportional calculation value, integral calculation value, differential calculation value and user main pipe flow feedforward calculation value to obtain the opening increment of the control valve. If the calculation result exceeds the full stroke of the control valve (<0% or >100%), the automatic limit is set to 0% or 100% to protect the valve mechanism.

[0038] In this embodiment, the proportional value is calculated by multiplying the current oxygen concentration difference by a preset proportional parameter; the integral value is calculated by multiplying the current oxygen concentration difference by a preset integral parameter; the differential value is calculated by subtracting three times the oxygen concentration difference from the previous time and adding the previous time's oxygen concentration difference, then multiplying by a preset differential parameter; the current user main pipe flow rate is used to perform a function calculation to obtain the current valve opening feedforward increment; finally, the proportional value, integral value, differential value, and user main pipe flow feedforward value are added to the valve opening increment, thus achieving precise control of the oxygen concentration in the user pipeline using a PID algorithm plus a flow feedforward algorithm. Specifically, the valve opening increment... for:

[0039] in, The difference in oxygen concentration at the current moment is obtained by subtracting the preset oxygen concentration from the current oxygen concentration information. The difference in oxygen concentration from the previous moment is obtained by subtracting the preset oxygen concentration from the oxygen concentration information at the previous moment. This is the difference in oxygen concentration from the previous moment, obtained by subtracting the preset oxygen concentration from the oxygen concentration information at the previous moment. For preset ratio parameters, Preset integration parameters, Preset differential parameters; This is the feedforward function for user bus flow.

[0040] Example 2 The oxygen regulation and control method of the present invention includes the following steps: 1) Construct the oxygenation control logic and calculation model; In this embodiment, the oxygen supply control adopts a composite control strategy of "feedforward control priority triggering + PID closed-loop regulation for precise correction", which aims to solve the problems of lag and insufficient accuracy in oxygen concentration regulation under flow fluctuations. The specific implementation logic is as follows: The feedforward control trigger condition is as follows: the flow rate of condensate / feed water header is continuously sampled by the flow transmitter (the sampling period is set to 1 second to avoid false triggering caused by instantaneous interference). When the flow fluctuation exceeds 20% within 3 consecutive sampling periods, the system automatically switches to feedforward control mode to prioritize the suppression of the impact of flow disturbance on oxygen concentration.

[0041] 2) Demineralized water flow rate calculation principle and model: Based on the "law of conservation of mass", utilizing the stable oxygen content of demineralized water (saturated dissolved oxygen content of 8000 μg / L under standard atmospheric pressure, with an error ≤ ±50 μg / L), combined with the current actual flow rate of the condensate system and the target oxygen concentration, the required demineralized water injection flow rate q1 at the condensate oxygenation point is calculated to ensure that after adding demineralized water, the oxygen concentration of the condensate system accurately approaches the set value. The required demineralized water injection flow rate q1 at the condensate oxygenation point is:

[0042] in, Q 1 represents the actual flow rate of the condensate tap; C Set the oxygen concentration for the condensate system.

[0043] Correlation control of regulating valve opening and flow rate: Through offline calibration experiments, the mapping relationship between the "opening degree and flow rate" of the condensate oxygenation regulating valve was established. The specific process is as follows: within the full stroke of the regulating valve (0-100% opening degree), the valve is gradually adjusted in 5% opening degree intervals, and the actual demineralized water flow rate at each opening degree is recorded. The linear function is obtained by fitting using the least squares method. q 1= k × θ + b ,in, θ To adjust the valve opening; k The flow coefficient, after calibration k =0.025; b For correction factor, b=0.05), the system calculates based on q 1. Substitute the values ​​into the function to calculate the opening degree of the control valve. θ = kq 1 b It controls the regulating valve to move to the target opening in one go (action response time ≤ 1.5 seconds) to avoid lag caused by step adjustment.

[0044] 2) Feedforward control method for water supply oxygenation points; The oxygenation control logic at the feedwater oxygenation point (deaerator downcomer) is the same as that at the condensate oxygenation point, also employing a "feedforward + PID" composite strategy. For the high-pressure condition of the feedwater system (deaerator rated pressure 1.2 MPa), it is optimized as follows: Booster pump parameter matching: The demineralized water booster pump at the water supply oxygenation point adopts a variable frequency booster pump. Its rated head is set to 1.5 times the rated pressure of the deaerator (i.e., 1.8MPa), and the rated flow rate is 1.2 times the maximum water demand of the four-way deaerator downcomer (to ensure redundancy). The frequency range is 20-50Hz, and the speed can be dynamically adjusted according to the actual injection flow rate to avoid energy waste caused by "large flow rate and small opening".

[0045] Calculation of demineralized water flow rate: Based on the feedwater header flow rate and the set oxygen concentration, the total demineralized water injection flow rate q2 of the four oxygen concentration regulating valves is calculated as follows:

[0046] in, Q 2 represents the actual flow rate of the main water supply pipe; C Set the oxygen concentration at the deaerator inlet.

[0047] Uniform distribution control of the four oxygen concentration regulating valves: q2 is distributed to each oxygen concentration regulating valve according to the flow ratio of the four deaerator downcomers (usually 1:1:1:1 depending on the unit design), meaning the target flow rate for each oxygen concentration regulating valve is... q Each of the four demineralized water injection points is controlled independently using an "opening degree - flow rate" calibration function to ensure uniform injection volume and avoid local oxygen concentration deviations within the deaerator.

[0048] System structure such as Figure 4As shown, the demineralized water from the high-concentration oxygen-enriched demineralized water tank 1 is pumped by booster pump 2 and then sent to four oxygen concentration regulating valves. After exiting each oxygen concentration regulating valve, the water flows into the user pipeline, thus regulating the oxygen concentration in the user pipeline. Each oxygen concentration regulating valve adjusts the oxygen concentration based on the flow rate in the user pipeline, ensuring that the oxygen concentration in each user pipeline is normal and reasonable. The function of booster pump 2 is to provide a high pressure so that the high-concentration oxygen-enriched demineralized water can be properly integrated into the user pipeline. The function of recirculation pressure regulating valve 4 is to stabilize the pressure at the outlet of booster pump and avoid large fluctuations in the outlet pressure. The function of condensate pipeline regulating valve 3 is to automatically adjust the oxygen concentration in the condensate pipeline according to the flow rate in the condensate header. The purpose of the recirculation regulating valve is to control the pressure in the header of the variable frequency pump outlet, ensuring that the pressure of the blending solution is always greater than the pressure in the user pipeline, thus ensuring the blending effect of the solvent; at the same time, it provides sufficient flow for the demineralized water blending, ensuring that the oxygen regulating valve has sufficient regulating flow.

[0049] This invention has the following characteristics: When the flow rate of condensate or feedwater fluctuates by more than 20%, the oxygenation control adopts feedforward control, which can shorten the response time to 5-10 seconds (more than 60% shorter than the existing single PID regulation), quickly suppress disturbances, and avoid oxygen concentration exceeding the range.

[0050] After the feedforward adjustment is completed, the system switches to PID adjustment (combined with the differential correction of historical concentration data), which can achieve a positive and negative deviation of less than 3 μg / L between the set oxygen concentration value and the detected value, which is a significant improvement in accuracy compared with the existing technology (deviation of 5-8 μg / L).

[0051] By coordinating the pressure control of the recirculation regulating valve and the variable frequency booster pump, the pressure fluctuation range of the booster pump outlet can be controlled within ±0.1MPa, avoiding interruption of demineralized water injection or unstable flow caused by pressure fluctuations. At the same time, it reduces the loss of pump body due to frequent start-stop, extends equipment service life, and reduces system energy consumption.

[0052] Coordinated control of dual oxygenation points reduces the overall system corrosion rate. A coordinated control logic is established between the condensate oxygenation point (condensate pump inlet) and the feedwater oxygenation point (deaerator downcomer): Priority setting: The oxygenation point of condensate should be adjusted first to ensure that the oxygen concentration of low-pressure equipment such as condensate pumps and condensate pipelines meets the standard (15-20μg / L) and inhibit flow-accelerated corrosion.

[0053] Linkage mechanism: When the oxygen concentration in the condensate system is stable within ±1 μg / L of the set value for 5 consecutive sampling cycles, the PID regulation of the feedwater oxygenation point is activated to control the oxygen concentration at the deaerator inlet at 20-25 μg / L, ensuring that the oxygen concentration at the evaporator inlet is qualified.

[0054] Example 3 The oxygen regulation and control system of the present invention includes: The acquisition module is used to acquire oxygen concentration and flow information within the pipeline. The control module is used to calculate the opening degree of the oxygen regulating valve according to the oxygen concentration information, flow information and preset concentration information in the pipeline and a preset PID control strategy, and control the oxygen regulating valve according to the opening degree of the oxygen regulating valve.

[0055] Furthermore, the control module includes: The first calculation unit is used to calculate the oxygen concentration difference based on the oxygen concentration information and the preset oxygen concentration information. The second calculation unit is used to perform PID+feedforward calculations based on the oxygen concentration difference and the main pipe flow rate to obtain the increase in the opening of the oxygen regulating valve. The third calculation unit is used to calculate the opening of the oxygen regulating valve at the next moment based on the increase in the opening of the oxygen regulating valve and the current valve opening.

[0056] The module division in this embodiment is illustrative and represents only one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in each embodiment of this application can be integrated into a single processor, exist as separate physical entities, or be integrated into a single module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0057] Example 4 A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the oxygen regulation control method, for example, including: acquiring oxygen concentration information and flow rate information within a pipeline; calculating the opening degree of an oxygen regulating valve according to a preset PID control strategy based on the oxygen concentration information, flow rate information, and preset concentration information within the pipeline; and controlling the oxygen regulating valve according to the opening degree of the oxygen regulating valve. The memory may include main memory, such as high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device. The processor, network interface, and memory are interconnected via an internal bus, which may be an industry standard architecture bus, a peripheral component interconnection standard bus, an extended industry standard architecture bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory stores the program; specifically, the program may include program code, which includes computer operation instructions. The memory may include main memory and non-volatile memory, and provides instructions and data to the processor.

[0058] Example 5 A computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the oxygen regulation control method. For example, the method includes: acquiring oxygen concentration information and flow rate information within a pipeline; calculating the opening degree of an oxygen regulating valve according to a preset PID control strategy based on the oxygen concentration information, flow rate information, and preset concentration information within the pipeline; and controlling the oxygen regulating valve according to the opening degree of the oxygen regulating valve. Specifically, the computer-readable storage medium includes, but is not limited to, volatile memory and / or non-volatile memory. The volatile memory may include random access memory (RAM) and / or cache memory, etc. The non-volatile memory may include read-only memory (ROM), hard disk, flash memory, optical disk, magnetic disk, etc.

[0059] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0060] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0061] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0062] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0063] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0064] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0065] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for regulating and controlling oxygen levels, characterized in that, include: Obtain oxygen concentration and flow rate information within the pipeline; Based on the oxygen concentration information, flow information, and preset concentration information in the pipeline, the opening degree of the oxygen regulating valve is calculated according to the preset PID control strategy, and the oxygen regulating valve is controlled according to the opening degree of the oxygen regulating valve.

2. The oxygen regulation and control method according to claim 1, characterized in that, The process of calculating the opening degree of the oxygen regulating valve based on the oxygen concentration information, flow information, and preset concentration information in the pipeline, according to a preset PID control strategy, is as follows: The oxygen concentration difference is calculated based on the oxygen concentration information and the preset oxygen concentration information. The increase in the opening of the oxygen regulating valve is obtained by performing PID+feedforward calculation based on the oxygen concentration difference and the main pipe flow rate. Calculate the opening degree of the oxygen regulating valve at the next moment based on the increase in the opening degree of the oxygen regulating valve and the current valve opening degree.

3. The oxygen regulation and control method according to claim 2, characterized in that, The process of obtaining the increase in the opening of the oxygen regulating valve by performing PID+feedforward calculation based on the oxygen concentration difference and the main pipe flow rate is as follows: Multiply the current oxygen concentration difference by a preset proportional parameter to obtain the calculated proportional value; Multiply the current oxygen concentration difference by the preset integration parameter to obtain the integral value; Subtract three times the oxygen concentration difference of the previous moment from the current oxygen concentration difference, add the current oxygen concentration difference, and then multiply by the preset differential parameter to obtain the differential calculation value. The current main pipe flow rate is used to calculate the current oxygen regulating valve user main pipe flow rate feedforward calculation value by performing a function calculation on the current main pipe flow rate value. The proportional, integral, and differential calculation values, along with the user's main pipe flow feedforward calculation value, are added together to obtain the oxygen control valve opening increment.

4. The oxygen regulation and control method according to claim 1, characterized in that, Increase in the opening degree of the oxygen regulating valve for: in, This represents the difference in oxygen concentration at the current moment. This represents the difference in oxygen concentration between the previous and next time steps. This represents the difference in oxygen concentration between the previous and next moments. This is a preset proportional parameter; Preset differential parameters; This is the feedforward function for user bus flow.

5. The oxygen regulation and control method according to claim 1, characterized in that, The pipeline is a condensate main pipe or a water supply main pipe.

6. The oxygen regulation and control method according to claim 1, characterized in that, Also includes: The pipeline flow is continuously sampled by a flow transmitter. When the flow fluctuation exceeds 20% within three consecutive sampling periods, the system automatically switches to feedforward control mode to prioritize suppressing the impact of flow disturbances on oxygen concentration.

7. A method for regulating and controlling oxygen levels, characterized in that, include: The acquisition module is used to acquire oxygen concentration and flow information within the pipeline. The control module is used to calculate the opening degree of the oxygen regulating valve according to the oxygen concentration information, flow information and preset concentration information in the pipeline and according to the preset PID control strategy, and control the oxygen regulating valve according to the opening degree of the oxygen regulating valve.

8. The oxygen regulation and control system according to claim 7, characterized in that, The control module includes: The first calculation unit is used to calculate the oxygen concentration difference based on the oxygen concentration information and the preset oxygen concentration information. The second calculation unit is used to perform PID+feedforward calculations based on the oxygen concentration difference and the main pipe flow rate to obtain the increase in the opening of the oxygen regulating valve. The third calculation unit is used to calculate the opening of the oxygen regulating valve at the next moment based on the increase in the opening of the oxygen regulating valve and the current valve opening.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the oxygen regulation and control method as described in any one of claims 1-6.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the oxygen regulation and control method as described in any one of claims 1-6.

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