Dilution air flow rate calculation method, device and electronic equipment

Abstract

This invention provides a method, apparatus, and electronic device for calculating dilution airflow, belonging to the field of dilution airflow calculation. The method includes: obtaining the measured temperature and measured differential pressure of the dilution air; calculating the actual compensation value of the dilution airflow based on the measured temperature and a compensation function for the dilution airflow; and calculating the dilution airflow based on the actual compensation value and the measured differential pressure of the dilution air. This invention solves the problem of large errors in previous dilution airflow calculations; it significantly improves the accuracy of dilution airflow calculations not only during unit operation but also ensures accuracy of the dilution airflow calculated before unit startup and after unit shutdown.

Description

Technical Field

[0001] This invention relates to the field of dilution airflow calculation, and more specifically to a method for calculating dilution airflow, a device for calculating dilution airflow, an electronic device, and a computer-readable storage medium. Background Technology

[0002] Currently, in denitrification processes, dilution airflow calculations typically use a fixed constant as the compensation coefficient for the flow rate. This constant dilution airflow compensation value is only applicable to a small temperature range when the unit is at full load, ensuring the accuracy of the calculation results.

[0003] If the temperature of the dilution air during operation differs significantly from the temperature point of the compensation coefficient in the dilution air flow calculation formula, the calculation result of the dilution air flow will have a large error. Furthermore, during the fan commissioning phase before unit startup and when the dilution air temperature is still low shortly after unit startup, the error in the calculation result of the dilution air flow will be further increased. Summary of the Invention

[0004] The purpose of this invention is to provide a method, apparatus, and electronic device for calculating dilution airflow, thereby solving the problem of large errors in existing methods for calculating dilution airflow.

[0005] To achieve the above objectives, the present invention provides a method for calculating dilution airflow, the method comprising:

[0006] Obtain the measured temperature and differential pressure of the dilution air;

[0007] The actual compensation value of the dilution air is calculated based on the measured temperature of the dilution air and the compensation function of the dilution air.

[0008] The dilution air flow rate is calculated based on the actual compensation value of the dilution air and the measured differential pressure of the dilution air.

[0009] Preferably, the compensation function for the dilution airflow is constructed in the following manner:

[0010] Select temperature points at different operating stages of the unit;

[0011] Calculate the flow compensation value corresponding to each temperature point;

[0012] By fitting the flow compensation values ​​corresponding to all temperature points, a compensation function for the dilution airflow is obtained.

[0013] Preferably, the method further includes: preprocessing the traffic compensation value, the preprocessing including: data removal and / or data transformation.

[0014] Preferably, the operation phase includes: the unit full-load phase, the unit start-up phase, and the unit shutdown phase.

[0015] Preferably, the compensation function for the dilution airflow is a linear function or a piecewise function.

[0016] Preferably, the formula for calculating the dilution airflow is:

[0017]

[0018] In the formula, F is the dilution air flow rate, f(T) is the actual compensation value of the dilution air flow rate, T is the measured temperature of the dilution air, and ΔP is the measured differential pressure of the dilution air.

[0019] The present invention also provides a dilution airflow calculation device, the device being used to implement the above-described dilution airflow calculation method, the device comprising:

[0020] The acquisition module is used to acquire the measured temperature and measured differential pressure of the dilution air;

[0021] The first calculation module is used to calculate the actual compensation value of the dilution airflow based on the measured temperature of the dilution airflow and the compensation function of the dilution airflow.

[0022] The second calculation module is used to calculate the dilution airflow based on the actual compensation value of the dilution airflow and the measured differential pressure of the dilution airflow.

[0023] Preferably, the device further includes:

[0024] The selection unit is used to select temperature points during different operating phases of the unit;

[0025] The calculation unit is used to calculate the flow compensation value corresponding to each temperature point;

[0026] The fitting unit is used to fit the flow compensation value corresponding to all temperature points to obtain the compensation function for the dilution air flow.

[0027] The present invention also provides an electronic 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 above-described dilution airflow calculation method.

[0028] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described method for calculating dilution airflow.

[0029] Through the above technical solution, the present invention has at least the following technical effects:

[0030] The method of this invention can solve the problem of large calculation errors in dilution airflow in the past; not only is the calculation accuracy of dilution airflow greatly improved during unit operation, but the dilution airflow calculated according to this scheme before unit startup and after unit shutdown is also accurate.

[0031] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This is a flowchart of a method for calculating dilution airflow according to one embodiment of the present invention;

[0034] Figure 2 This is a flowchart of a compensation function for constructing dilution airflow provided in an optional embodiment of the present invention;

[0035] Figure 3 This is a block diagram of a dilution airflow calculation device provided in an optional embodiment of the present invention. Detailed Implementation

[0036] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0037] Figure 1 This is a flowchart of a dilution airflow calculation method provided in one embodiment of the present invention, as shown below. Figure 1 As shown, a method for calculating dilution airflow includes:

[0038] Step S101: Obtain the measured temperature and measured differential pressure of the dilution air;

[0039] In this embodiment, a thermometer and a differential pressure gauge can be used to detect the temperature and differential pressure of the dilution air, thereby obtaining the measured temperature and measured differential pressure of the dilution air.

[0040] Step S102: Calculate the actual compensation value of the dilution air flow rate based on the measured temperature of the dilution air and the compensation function of the dilution air flow rate; that is, substitute the measured temperature of the dilution air into the compensation function of the dilution air flow rate, and the calculated result is the actual compensation value.

[0041] As a further optimization of this embodiment, such as Figure 2 As shown, the compensation function for dilution airflow is constructed in the following way:

[0042] Step a01: Select temperature points at different operating stages of the unit;

[0043] In this embodiment, the operation phase includes: unit full load phase, unit start-up phase, and unit shutdown phase. In the above three phases, temperature points can be selected in two of the phases, or temperature points can be selected in each phase.

[0044] Step a02: Calculate the flow compensation value corresponding to each temperature point;

[0045] In this embodiment, the method further includes: preprocessing the traffic compensation value, the preprocessing including: data removal and / or data transformation; abnormal data in the traffic compensation value can be removed to ensure the accuracy of subsequent compensation function fitting.

[0046] Step a03: Fit the flow compensation value corresponding to all temperature points to obtain the compensation function for dilution air flow.

[0047] In this embodiment, the compensation function for the dilution airflow is a linear function or a piecewise function; a linear function can be directly fitted based on several flow compensation values; or a piecewise function can be formed by sequentially connecting all the flow compensation values.

[0048] Step S103: Calculate the dilution air flow rate based on the actual compensation value of the dilution air and the measured differential pressure of the dilution air.

[0049] Specifically, the formula for calculating the dilution airflow is:

[0050]

[0051] In the formula, F is the dilution air flow rate, f(T) is the actual compensation value of the dilution air flow rate, T is the measured temperature value of the dilution air, and ΔP is the measured differential pressure of the dilution air.

[0052] The method of this invention can solve the problem of large calculation errors in dilution airflow in the past; not only is the calculation accuracy of dilution airflow greatly improved during unit operation, but the dilution airflow calculated according to this scheme before unit startup and after unit shutdown is also accurate.

[0053] Figure 3 This is a block diagram of a dilution airflow calculation device provided in an optional embodiment of the present invention, as shown below. Figure 3 As shown, a dilution airflow calculation device is used to implement the above-described dilution airflow calculation method. The device includes:

[0054] The acquisition module is used to acquire the measured temperature and measured differential pressure of the dilution air;

[0055] The first calculation module is used to calculate the actual compensation value of the dilution air flow rate based on the measured temperature of the dilution air and the compensation function of the dilution air flow rate.

[0056] The second calculation module is used to calculate the dilution air flow rate based on the actual compensation value of the dilution air flow rate and the measured differential pressure of the dilution air.

[0057] As a further optimization of this embodiment, the device further includes:

[0058] The selection unit is used to select temperature points during different operating phases of the unit;

[0059] The calculation unit is used to calculate the flow compensation value corresponding to each temperature point;

[0060] The fitting unit is used to fit the flow compensation value corresponding to all temperature points to obtain the compensation function for the dilution air flow.

[0061] This invention can solve the problem of large calculation errors in dilution airflow in the past; it not only greatly improves the accuracy of dilution airflow calculation during unit operation, but also ensures that the dilution airflow calculated according to this solution is accurate before unit startup and after unit shutdown.

[0062] The dilution airflow calculation device includes a processor and a memory. The construction module, acquisition module, first calculation module, second calculation module, selection unit, calculation unit and fitting unit are all stored as program units in the memory. The processor executes the above program units stored in the memory to realize the corresponding functions.

[0063] The processor contains a kernel, which retrieves the corresponding program unit from memory. One or more kernels can be configured, and the airflow calculation method can be refined by adjusting the kernel parameters.

[0064] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0065] This invention provides an electronic device, including 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 aforementioned dilution airflow calculation method. The electronic device in this embodiment can be a server, PC, PAD, mobile phone, etc.

[0066] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described method for calculating dilution airflow.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0072] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0073] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0074] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0075] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method of calculating a dilution air flow rate, characterized by, The method includes: Obtain the measured temperature and differential pressure of the dilution air; The actual compensation value of the dilution air flow rate is calculated based on the measured temperature of the dilution air and the compensation function of the dilution air flow rate. The dilution air flow rate is calculated based on the actual compensation value of the dilution air and the measured differential pressure of the dilution air. The compensation function for the dilution airflow is constructed as follows: Select temperature points at different operating stages of the unit; Calculate the flow compensation value corresponding to each temperature point; The compensation function for dilution airflow is obtained by fitting the flow compensation values ​​corresponding to all temperature points. The formula for calculating the dilution airflow is as follows: ； wherein F is the dilution air flow rate, f ( T ) is the actual compensation value of the dilution air flow rate, T is the measured temperature of the dilution air, P is the measured differential pressure of the dilution air.

2. The method according to claim 1, characterized in that, Also includes: The traffic compensation value is preprocessed, and the preprocessing includes: data removal and / or data transformation.

3. The method according to claim 1, characterized in that, The operation phases include: the unit full-load phase, the unit start-up phase, and the unit shutdown phase.

4. The method according to claim 1, characterized in that, The compensation function for dilution airflow can be a linear function or a piecewise function.

5. A dilution airflow calculation device, the device being used to implement the dilution airflow calculation method according to any one of claims 1-4, the device comprising: The acquisition module is used to acquire the measured temperature and measured differential pressure of the dilution air; The first calculation module is used to calculate the actual compensation value of the dilution air flow rate based on the measured temperature of the dilution air and the compensation function of the dilution air flow rate. The second calculation module is used to calculate the dilution air flow rate based on the actual compensation value of the dilution air flow rate and the measured differential pressure of the dilution air. The device further includes: The selection unit is used to select temperature points during different operating phases of the unit; The calculation unit is used to calculate the flow compensation value corresponding to each temperature point; The fitting unit is used to fit the flow compensation value corresponding to all temperature points to obtain the compensation function for dilution air flow. The formula for calculating the dilution airflow is as follows: ； In the formula, F To dilute the airflow, f ( T This represents the actual compensation value for the dilution airflow. T To dilute the measured temperature of the wind, △ P The measured differential pressure of the dilution air.

6. An electronic 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 dilution airflow calculation method according to any one of claims 1-4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the dilution airflow calculation method as described in any one of claims 1-4.

Images