Matrix flue gas flow meter flow calculation method and device based on flow field simulation

Abstract

The present application proposes a flow calculation method for a matrix flue gas flowmeter based on flow field simulation, wherein the method includes: obtaining the design parameters of the actual flue; according to the design parameters, using simulation software to perform numerical simulation of the flow field of the actual flue to obtain a flue model; according to the flue model, designing the measuring point positions of the multi-point matrix flue gas flowmeter and marking them in the flue model, simulating multiple different flue gas flow rates in the flue model, and obtaining the flue gas flow rate at the measuring point positions under multiple different flue gas flow rates; according to the multiple different flue gas flow rates and the flue gas flow rate at the corresponding measuring point positions, using multiple linear regression to calculate the flow calculation coefficient; obtaining the actual flue gas flow rate in the actual flue, and calculating the flue gas flow rate in the actual flue based on the actual flue gas flow rate and the flow calculation coefficient. The present application uses multiple linear regression to calculate the velocity field coefficient of the flue gas flow at each measuring point, thereby obtaining a more accurate flue gas flow rate.

Description

Technical Field

[0001] The present application relates to the technical field of flue gas flow calculation, and in particular to a flow calculation method and device for a matrix flue gas flowmeter based on flow field simulation. Background Art

[0002] In order to monitor the NO emissions from flue gas of thermal power plants x To measure the presence of pollutants such as SO2, CO2, and others, a flue gas flow measurement device must be installed in the flue. Due to the large size of the flue, a multi-point matrix flue gas flowmeter with multiple measurement points can accurately and reliably measure the flue gas interface flow rate. However, due to the uneven distribution of the velocity field within the pipe, velocities vary significantly at different cross-sectional locations, making it difficult to obtain accurate velocity field coefficients. Summary of the Invention

[0003] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, the first purpose of this application is to propose a flow calculation method for a matrix flue gas flowmeter based on flow field simulation, which solves the technical problem that the existing methods are difficult to obtain accurate velocity field coefficients and accurate flue gas flow. The velocity field coefficients of the flue gas flow at each measuring point are calculated using multivariate linear regression, so that a more accurate flue gas flow can be obtained through a multi-point matrix flue gas flowmeter.

[0005] The second purpose of this application is to propose a flow calculation device for a matrix flue gas flow meter based on flow field simulation.

[0006] The third object of this application is to provide a computer device.

[0007] A fourth object of the present application is to provide a non-transitory computer-readable storage medium.

[0008] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a flow calculation method for a matrix flue gas flowmeter based on flow field simulation, including: obtaining the design parameters of the actual flue; according to the design parameters, using simulation software to perform numerical simulation of the flow field of the actual flue to obtain a flue model; according to the flue model, designing the measuring point positions of the multi-point matrix flue gas flowmeter and marking them in the flue model, simulating multiple different flue gas flow rates in the flue model, and obtaining the flue gas flow rate at the measuring point positions under multiple different flue gas flow rates; according to the multiple different flue gas flow rates and the flue gas flow rate at the corresponding measuring point positions, using multiple linear regression to calculate the flow calculation coefficient; obtaining the actual flue gas flow rate in the actual flue, and calculating the flue gas flow in the actual flue based on the actual flue flow rate and the flow calculation coefficient.

[0009] Optionally, in one embodiment of the present application, the measurement point positions of the multi-point matrix flue gas flow meter are designed according to the flue model, including:

[0010] If the flue model is a circular flue, the cross-section position is obtained according to the diameter and height of the circular flue, and multiple measuring points are designed at the cross-section position;

[0011] If the flue model is a rectangular flue, the equivalent diameter of the rectangular flue is obtained according to the length and width of the rectangular flue, and the cross-sectional position is obtained according to the equivalent diameter and the height of the rectangular flue, and multiple measuring points are designed at the cross-sectional position.

[0012] Optionally, in one embodiment of the present application, multiple different flue gas flow rates are simulated in the flue model to obtain flue gas flow velocities at measuring points under multiple different flue gas flow rates, including:

[0013] Obtain the actual flue gas parameters and simulate the flue gas in the flue model according to the flue gas parameters;

[0014] By changing the parameters of the simulated flue gas and giving a plurality of different flue gas flow rates, the flue gas flow velocities at the measuring point positions under a plurality of different flue gas flow rates can be obtained.

[0015] Optionally, in one embodiment of the present application, a flow calculation coefficient is obtained by using multiple linear regression calculation based on a plurality of different flue gas flow rates and the flue gas flow velocities at the corresponding measuring points, including:

[0016] For multiple different flue gas flow rates and their corresponding flue gas flow velocities at measuring points, the flue gas flow rate, flue gas flow rate and flow calculation coefficient are expanded into a matrix form. Based on the calculation relationship between flue gas flow rate and flue gas flow velocity, the flow calculation coefficient is obtained by using multiple linear regression calculation;

[0017] Among them, the calculation relationship between flue gas flow rate and flue gas flow velocity is expressed as:

[0018] Y=XW

[0019] Where Y represents the matrix form of flue gas flow rate, W represents the matrix form of flow calculation coefficient, and X represents the matrix form of flue gas flow rate at the measuring point.

[0020] The flow calculation coefficient calculation formula is expressed as:

[0021] W=(X T X) -1 X T Y

[0022] Among them, W represents the matrix form of the flow calculation coefficient, X represents the matrix form of the flue gas flow velocity at the measuring point, and X T represents the transposed matrix of the flue gas flow rate at the measuring point, and Y represents the matrix form of the flue gas flow rate;

[0023] The flow calculation coefficient is expressed as:

[0024]

[0025] Among them, β0, β1,…, β m Indicates the flow calculation coefficient.

[0026] Optionally, in one embodiment of the present application, the calculation formula of the actual flue gas flow rate is expressed as:

[0027] y=β0+β1x1+β2x2+...+β m x m

[0028] Among them, y represents the actual flue gas flow rate, x1, x2, ..., x m represents the flue gas velocity at m measuring points, β0, β1, β2, …, β m Indicates the flow calculation coefficient.

[0029] To achieve the above-mentioned purpose, the second embodiment of the present application proposes a flow calculation device for a matrix flue gas flow meter based on flow field simulation, comprising:

[0030] An acquisition module is used to obtain the design parameters of the actual flue;

[0031] The model simulation module is used to perform numerical simulation of the flow field of the actual flue using simulation software according to the design parameters to obtain the flue model;

[0032] The flue gas simulation module is used to design the measurement point locations of the multi-point matrix flue gas flowmeter according to the flue model and mark them in the flue model. It simulates multiple different flue gas flow rates in the flue model to obtain the flue gas flow rate at the measurement point locations under multiple different flue gas flow rates.

[0033] A coefficient calculation module is used to obtain a flow calculation coefficient by using multiple linear regression calculation based on multiple different flue gas flow rates and the flue gas flow velocities at the corresponding measuring point positions;

[0034] The flue gas flow calculation module is used to obtain the actual flue gas flow velocity in the actual flue, and calculate the actual flue gas flow in the flue according to the actual flue gas flow velocity and the flow calculation coefficient.

[0035] Optionally, in one embodiment of the present application, the smoke simulation module is specifically configured to:

[0036] If the flue model is a circular flue, the cross-section position is obtained according to the diameter and height of the circular flue, and multiple measuring points are designed at the cross-section position;

[0037] If the flue model is a rectangular flue, the equivalent diameter of the rectangular flue is obtained according to the length and width of the rectangular flue, and the cross-sectional position is obtained according to the equivalent diameter and the height of the rectangular flue, and multiple measuring points are designed at the cross-sectional position.

[0038] Optionally, in one embodiment of the present application, the smoke simulation module is further configured to:

[0039] Obtain the actual flue gas parameters and simulate the flue gas in the flue model according to the flue gas parameters;

[0040] By changing the parameters of the simulated flue gas and giving a plurality of different flue gas flow rates, the flue gas flow velocities at the measuring point positions under a plurality of different flue gas flow rates can be obtained.

[0041] To achieve the above-mentioned purpose, the third embodiment of the present application proposes a computer device, including a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the computer program, the flow calculation method of the matrix flue gas flow meter based on flow field simulation described in the above embodiment is implemented.

[0042] In order to achieve the above-mentioned objectives, the fourth embodiment of the present application proposes a non-temporary computer-readable storage medium. When the instructions in the storage medium are executed by a processor, a matrix flue gas flow meter flow calculation method based on flow field simulation can be executed.

[0043] The flow calculation method, device, computer equipment and non-temporary computer-readable storage medium of the matrix flue gas flowmeter based on flow field simulation in the embodiments of the present application solve the technical problem that the existing methods are difficult to obtain accurate velocity field coefficients and accurate flue gas flow. The velocity field coefficients of the flue gas flow at each measuring point are calculated by using multiple linear regression, so that a more accurate flue gas flow can be obtained through a multi-point matrix flue gas flowmeter.

[0044] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0046] Figure 1 This is a flow chart of a method for calculating flow rate of a matrix flue gas flow meter based on flow field simulation provided in Example 1 of the present application;

[0047] Figure 2 This is a structural schematic diagram of a flow calculation device of a matrix flue gas flow meter based on flow field simulation provided in Example 2 of the present application. DETAILED DESCRIPTION

[0048] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0049] Common flue gas flowmeters include differential pressure and thermal conductivity. Differential pressure flowmeters are based on Bernoulli's theorem and measure the flow rate by measuring the differential pressure across the throttle element. Thermal conductivity flowmeters use the principle of heat conduction, exploiting the heat exchange between the fluid and a heat source, to measure flow rate. Thermal conductivity flowmeters typically measure at a single point, making them inaccurate for large flue gas flow measurements. Differential pressure flowmeters generally come in three types: Annubar, Verabar, and Pitot tubes. They can measure pressure at either a single point or multiple points.

[0050] Due to the large cross-sectional dimensions of flue ducts, single-point measurement cannot accurately measure flue flow. Therefore, matrix flow meters with multi-point measurement are commonly used. However, due to the diverse flue duct types in thermal power plants, matrix flow meters have specific installation requirements, avoiding locations with bends and cross-sectional changes. However, this still cannot guarantee a uniform and stable flue gas flow field across the cross section. Current research has employed a simple averaging calculation of the flow velocities measured at multiple points to determine the cross-sectional average flue gas flow velocity. Other studies have used manual reference methods to calculate the velocity field coefficient for each measurement point. However, due to the uneven and unstable flow field distribution, the averaging calculation will introduce certain errors. The manual reference method is difficult to implement in actual measurements and still has certain errors, making it difficult to obtain an accurate cross-sectional average flow velocity. Existing methods use flow field simulation to determine the single-point measurement location, use a calibration system to measure the flue gas flow before desulfurization, and then use theoretical calculations to determine the correction coefficient between the flue gas flow rate and the single-point monitored flow velocity. However, the flue gas flow rate after desulfurization obtained through theoretical calculations has certain errors, resulting in errors in the correction coefficient.

[0051] In order to improve the accuracy of flue gas flow calculation, this application proposes a flow calculation method for a multi-point matrix flue gas flowmeter based on flow field simulation. By performing flow field simulation on the actual flue model and combining the layout plan of the flue gas flowmeter, the data correspondence between the cross-sectional flue gas flow rate and the flue gas flow velocity measured at multiple points is obtained. The velocity field coefficient of each measuring point is calculated using multivariate linear regression, and a more accurate flue gas flow rate can be obtained through the multi-point matrix flue gas flowmeter.

[0052] The following describes a flow calculation method and device for a matrix flue gas flow meter based on flow field simulation according to an embodiment of the present application with reference to the accompanying drawings.

[0053] Figure 1 This is a flow chart of a method for calculating flow rate of a matrix flue gas flow meter based on flow field simulation provided in Example 1 of the present application.

[0054] like Figure 1 As shown, the flow calculation method of the matrix flue gas flow meter based on flow field simulation includes the following steps:

[0055] Step 101, obtaining the design parameters of the actual flue;

[0056] Step 102: Based on the design parameters, a flow field numerical simulation is performed on the actual flue using simulation software to obtain a flue model;

[0057] Step 103: Designing measurement point locations of a multi-point matrix flue gas flowmeter based on the flue model and marking them in the flue model. Simulating multiple different flue gas flow rates in the flue model to obtain flue gas flow velocities at the measurement point locations under multiple different flue gas flow rates.

[0058] Step 104, using multiple linear regression to calculate the flow rate calculation coefficient based on multiple different flue gas flow rates and the flue gas flow velocities at the corresponding measuring points;

[0059] Step 105 : obtaining the actual flue gas flow velocity in the actual flue, and calculating the actual flue gas flow in the flue according to the actual flue gas flow velocity and the flow calculation coefficient.

[0060] The flow calculation method of the matrix flue gas flowmeter based on flow field simulation of the embodiment of the present application is as follows: by obtaining the design parameters of the actual flue; according to the design parameters, using simulation software to perform flow field numerical simulation on the actual flue to obtain a flue model; according to the flue model, designing the measuring point positions of the multi-point matrix flue gas flowmeter and marking them in the flue model, simulating multiple different flue gas flows in the flue model, and obtaining the flue gas flow rate at the measuring point position under multiple different flue gas flows; according to the flue gas flow rates at the multiple different flue gas flows and their corresponding measuring point positions, using multiple linear regression to calculate the flow calculation coefficient; obtaining the actual flue gas flow rate in the actual flue, and calculating the flue gas flow rate in the actual flue according to the actual flue gas flow rate and the flow calculation coefficient. Thus, it is possible to solve the technical problem that the existing method is difficult to obtain accurate velocity field coefficients and accurate flue gas flow, and use multiple linear regression to calculate the velocity field coefficients of the flue gas flow at each measuring point, so that a more accurate flue gas flow can be obtained through the multi-point matrix flue gas flowmeter.

[0061] This application proposes a multi-point matrix flue gas flow calculation method based on flow field simulation. The actual flue model and flow meter layout scheme are modeled using simulation software to obtain the correspondence between the cross-sectional flue gas flow and the flue gas flow at multiple measurement points. The velocity field coefficient of the flue gas flow at each measurement point is calculated using multiple linear regression, thereby obtaining the flow calculation model of the multi-point matrix flue gas flow meter.

[0062] This application obtains the design drawings and relevant model parameters of the actual flue, including the length, width, height, curved structure, internal structure, etc. of the flue, and uses CFD simulation software to perform numerical simulation of the flow field of the actual flue to obtain the flow field distribution inside the flue model.

[0063] Furthermore, in the embodiment of the present application, the measurement point positions of the multi-point matrix flue gas flow meter are designed according to the flue model, including:

[0064] If the flue model is a circular flue, the cross-section position is obtained according to the diameter and height of the circular flue, and multiple measuring points are designed at the cross-section position;

[0065] If the flue model is a rectangular flue, the equivalent diameter of the rectangular flue is obtained according to the length and width of the rectangular flue, and the cross-sectional position is obtained according to the equivalent diameter and the height of the rectangular flue, and multiple measuring points are designed at the cross-sectional position.

[0066] This application designs reasonable measuring point positions of a multi-point matrix flue gas flowmeter according to the flue model, wherein m measuring point positions can be designed and marked in the simulated flue model.

[0067] If the flue model is a circular flue, the distance between the section where the measuring point is located and the upstream elbow, valve, and reducer should be ≥4 times the flue diameter, and the distance from the downstream elbow, valve, and reducer should be ≥2 times the flue diameter.

[0068] If the flue model is a rectangular flue, use D=2AB / (A+B) to calculate its equivalent diameter, where A and B are the length and width of the flue. The distance between the section where the measuring point is located and the upstream elbow, valve, and reducer should be ≥4 times the equivalent diameter, and the distance from the downstream elbow, valve, and reducer should be ≥2 times the equivalent diameter.

[0069] Furthermore, in the embodiment of the present application, multiple different flue gas flow rates are simulated in the flue model to obtain the flue gas flow velocities at the measuring points under multiple different flue gas flow rates, including:

[0070] Obtain the actual flue gas parameters and simulate the flue gas in the flue model according to the flue gas parameters;

[0071] By changing the parameters of the simulated flue gas and giving a plurality of different flue gas flow rates, the flue gas flow velocities at the measuring point positions under a plurality of different flue gas flow rates can be obtained.

[0072] Obtain the actual flue gas parameters, including flue gas temperature, flow rate, pressure, humidity, gas composition (NO x , SO2, CO2, CO, etc.), the fluctuation range of solid dust particle content, etc.

[0073] By simulating flue gas under different conditions and changing the parameters of the simulated flue gas, n different flue gas flow rates are given, and n groups of flue gas flow rates and m flue gas flow rate data of the multi-point matrix flue gas flowmeter are obtained. The flue gas flow rate is represented by y, and the flue gas flow rates at multiple measuring points are represented by x1, x2, ..., x m express.

[0074] Furthermore, in the embodiment of the present application, the flow calculation coefficient is obtained by using multiple linear regression calculation based on multiple different flue gas flow rates and the flue gas flow velocities at the corresponding measuring points, including:

[0075] For multiple different flue gas flow rates and their corresponding flue gas flow velocities at measuring points, the flue gas flow rate, flue gas flow rate and flow calculation coefficient are expanded into a matrix form. Based on the calculation relationship between flue gas flow rate and flue gas flow velocity, the flow calculation coefficient is obtained by using multiple linear regression calculation;

[0076] Among them, the calculation relationship between flue gas flow rate and flue gas flow velocity is expressed as:

[0077] Y=XW

[0078] Where Y represents the matrix form of flue gas flow rate, W represents the matrix form of flow calculation coefficient, and X represents the matrix form of flue gas flow rate at the measuring point.

[0079] The flow calculation coefficient calculation formula is expressed as:

[0080] W=(X T X) -1 X T Y

[0081] Among them, W represents the matrix form of the flow calculation coefficient, X represents the matrix form of the flue gas flow velocity at the measuring point, and X T represents the transposed matrix of the flue gas flow rate at the measuring point, and Y represents the matrix form of the flue gas flow rate;

[0082] The flow calculation coefficient is expressed as:

[0083]

[0084] Among them, β0, β1,…, β m Indicates the flow calculation coefficient.

[0085] Using the multivariate linear regression method, calculate β0 and the velocity field coefficient β at each measuring point i ,i∈(1,2,...,m). The relationship between the flue gas flow rate and the m flue gas flow rates of the multi-point matrix flue gas flow meter is shown in the following formula:

[0086] y=β0+β1x1+β2x2+...+β m x m

[0087] Where y represents the flue gas flow rate, x1, x2, ..., x m represents the flue gas velocity at m measuring points, β0 represents the bias parameter, β1,…,β m Represents the velocity field coefficients at the locations of m measuring points.

[0088] For n sets of data, expand the above formula into matrix form:

[0089]

[0090]

[0091]

[0092]

[0093] min Loss = (Y - XW) 2

[0094] When Loss is minimum, the gradient of Loss with respect to W is 0:

[0095]

[0096] Solve to obtain β0 and velocity field coefficient β i :

[0097] W=(X T X) -1 X T Y

[0098] Among them, W represents the matrix form of the flow calculation coefficient, X represents the matrix form of the flue gas flow velocity at the measuring point, and X T It represents the transposed matrix of the flue gas flow rate at the measuring point, and Y represents the matrix form of the flue gas flow rate.

[0099] Furthermore, in the embodiment of the present application, the calculation formula of the actual flue gas flow rate is expressed as:

[0100] y=β0+β1x1+β2x2+...+β m x m

[0101] Among them, y represents the actual flue gas flow rate, x1, x2, ..., x m represents the flue gas velocity at m measuring points, β0, β1, β2, …, β m Indicates the flow calculation coefficient.

[0102] When the present invention uses a multi-point matrix flue gas flow meter to perform online flue gas monitoring, m flue gas flow rate data x1, x2, ..., x are measured. m , using β0 and velocity field coefficient β i Calculate the accurate flue gas flow.

[0103] Figure 2 This is a structural schematic diagram of a flow calculation device of a matrix flue gas flow meter based on flow field simulation provided in Example 2 of the present application.

[0104] like Figure 2 As shown, the flow calculation device of the matrix type flue gas flow meter based on flow field simulation includes:

[0105] An acquisition module 10 is used to obtain the design parameters of the actual flue;

[0106] The model simulation module 20 is used to perform flow field numerical simulation on the actual flue using simulation software according to the design parameters to obtain a flue model;

[0107] The flue gas simulation module 30 is used to design the measurement point locations of the multi-point matrix flue gas flowmeter according to the flue model and mark them in the flue model, simulate multiple different flue gas flow rates in the flue model, and obtain the flue gas flow velocities at the measurement point locations under multiple different flue gas flow rates;

[0108] The coefficient calculation module 40 is used to calculate the flow calculation coefficient by using multiple linear regression according to a plurality of different flue gas flow rates and the flue gas flow velocities at the corresponding measuring points;

[0109] The flue gas flow calculation module 50 is used to obtain the actual flue gas flow velocity in the actual flue, and calculate the actual flue gas flow in the flue according to the actual flue gas flow velocity and the flow calculation coefficient.

[0110] The flow calculation device of the matrix flue gas flow meter based on flow field simulation of the embodiment of the present application includes an acquisition module for obtaining the design parameters of the actual flue; a model simulation module for performing flow field numerical simulation of the actual flue using simulation software according to the design parameters to obtain the flue model; a flue gas simulation module for designing the measuring point positions of the multi-point matrix flue gas flow meter according to the flue model and marking them in the flue model, simulating multiple different flue gas flows in the flue model, and obtaining the flue gas flow rate at the measuring point position under multiple different flue gas flows; a coefficient calculation module for calculating the flow calculation coefficient using multiple linear regression according to the flue gas flow rates at the measuring point positions corresponding to multiple different flue gas flows; a flue gas flow calculation module for obtaining the actual flue gas flow rate in the actual flue, and calculating the flue gas flow rate in the actual flue according to the actual flue gas flow rate and the flow calculation coefficient. Thus, it is possible to solve the technical problem that the existing method is difficult to obtain accurate velocity field coefficients and accurate flue gas flow, and use multiple linear regression to calculate the velocity field coefficients of the flue gas flow at each measuring point, so that a more accurate flue gas flow can be obtained through the multi-point matrix flue gas flow meter.

[0111] Furthermore, in the embodiment of the present application, the smoke simulation module is specifically used to:

[0112] If the flue model is a circular flue, the cross-section position is obtained according to the diameter and height of the circular flue, and multiple measuring points are designed at the cross-section position;

[0113] If the flue model is a rectangular flue, the equivalent diameter of the rectangular flue is obtained according to the length and width of the rectangular flue, and the cross-sectional position is obtained according to the equivalent diameter and the height of the rectangular flue, and multiple measuring points are designed at the cross-sectional position.

[0114] Furthermore, in the embodiment of the present application, the smoke simulation module is also used to:

[0115] Obtain the actual flue gas parameters and simulate the flue gas in the flue model according to the flue gas parameters;

[0116] By changing the parameters of the simulated flue gas and giving a plurality of different flue gas flow rates, the flue gas flow velocities at the measuring point positions under a plurality of different flue gas flow rates can be obtained.

[0117] In order to implement the above embodiments, the present application also proposes a computer device, including a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the computer program, the flow calculation method of the matrix flue gas flow meter based on flow field simulation described in the above embodiments is implemented.

[0118] In order to implement the above embodiment, the present application also proposes a non-temporary computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the flow calculation method of the matrix flue gas flow meter based on flow field simulation of the above embodiment is implemented.

[0119] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0120] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0121] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0122] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0123] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0124] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0125] In addition, the functional units in the various embodiments of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0126] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A flow calculation method for a matrix flue gas flow meter based on flow field simulation, characterized in that: include: Obtain the design parameters of the actual flue; According to the design parameters, using simulation software to perform flow field numerical simulation on the actual flue to obtain a flue model; According to the flue model, measuring point positions of a multi-point matrix flue gas flowmeter are designed and marked in the flue model, and multiple different flue gas flow rates are simulated in the flue model to obtain flue gas flow velocities at the measuring point positions under the multiple different flue gas flow rates; According to the multiple different flue gas flow rates and the flue gas flow velocities at the corresponding measuring points, a flow calculation coefficient is obtained by using a multivariate linear regression calculation; Obtaining an actual flue gas flow rate in the actual flue, and calculating the actual flue gas flow rate in the flue according to the actual flue gas flow rate and the flow calculation coefficient; The flow calculation coefficient is obtained by using multiple linear regression calculation based on the multiple different flue gas flow rates and the flue gas flow velocities at the corresponding measuring points, including: For a plurality of different flue gas flow rates and the corresponding flue gas flow velocities at the measuring point positions, the flue gas flow rate, the flue gas flow rate and the flow calculation coefficient are expanded into a matrix form, and the flow calculation coefficient is obtained by using a multivariate linear regression calculation based on the calculation relationship between the flue gas flow rate and the flue gas flow velocity; The calculation relationship between the flue gas flow rate and the flue gas flow velocity is expressed as: Where Y represents the matrix form of flue gas flow rate, W represents the matrix form of flow calculation coefficient, and X represents the matrix form of flue gas flow rate at the measuring point. The flow calculation coefficient calculation formula is expressed as: Among them, W represents the matrix form of the flow calculation coefficient, X represents the matrix form of the flue gas flow velocity at the measuring point, and X T represents the transposed matrix of the flue gas flow rate at the measuring point, and Y represents the matrix form of the flue gas flow rate; The flow calculation coefficient is expressed as: in, Indicates the flow calculation coefficient.

2. The method according to claim 1, wherein The design of the measuring point positions of the multi-point matrix flue gas flowmeter according to the flue model includes: If the flue model is a circular flue, a cross-sectional position is obtained according to the diameter and height of the circular flue, and multiple measuring points are designed at the cross-sectional position; If the flue model is a rectangular flue, the equivalent diameter of the rectangular flue is obtained according to the length and width of the rectangular flue, the cross-sectional position is obtained according to the equivalent diameter and the height of the rectangular flue, and multiple measuring points are designed at the cross-sectional position.

3. The method according to claim 2, wherein The simulating a plurality of different flue gas flow rates in the flue model to obtain flue gas flow velocities at measuring points under the plurality of different flue gas flow rates includes: Acquiring actual flue gas parameters, and simulating flue gas in the flue model according to the flue gas parameters; By changing the parameters of the simulated flue gas, a plurality of different flue gas flow rates are given, thereby obtaining the flue gas flow velocities at the measuring point positions under the plurality of different flue gas flow rates.

4. The method according to claim 1, wherein The calculation formula of the flue gas flow rate in the actual flue is expressed as: Among them, y represents the actual flue gas flow rate, represents the flue gas velocity at m measuring points, Indicates the flow calculation coefficient.

5. A flow calculation device for a matrix flue gas flow meter based on flow field simulation, characterized in that: The device is used to implement the flow calculation method of the matrix flue gas flow meter based on flow field simulation as claimed in claim 1, and the device includes: An acquisition module is used to obtain the design parameters of the actual flue; A model simulation module is used to perform flow field numerical simulation on the actual flue using simulation software according to the design parameters to obtain a flue model; a flue gas simulation module, configured to design the measurement point locations of a multi-point matrix flue gas flowmeter according to the flue model and mark them in the flue model, simulate multiple different flue gas flow rates in the flue model, and obtain the flue gas flow velocities at the measurement point locations under the multiple different flue gas flow rates; A coefficient calculation module, configured to obtain a flow calculation coefficient by using multiple linear regression calculation based on the multiple different flue gas flow rates and the flue gas flow velocities at the corresponding measuring points; The flue gas flow calculation module is used to obtain the actual flue gas flow rate in the actual flue, and calculate the actual flue gas flow rate in the flue according to the actual flue gas flow rate and the flow calculation coefficient.

6. The device according to claim 5, characterized in that The flue gas simulation module is specifically used for: If the flue model is a circular flue, a cross-sectional position is obtained according to the diameter and height of the circular flue, and multiple measuring points are designed at the cross-sectional position; If the flue model is a rectangular flue, the equivalent diameter of the rectangular flue is obtained according to the length and width of the rectangular flue, the cross-sectional position is obtained according to the equivalent diameter and the height of the rectangular flue, and multiple measuring points are designed at the cross-sectional position.

7. The device according to claim 6, characterized in that The flue gas simulation module is also used to: Acquiring actual flue gas parameters, and simulating flue gas in the flue model according to the flue gas parameters; By changing the parameters of the simulated flue gas, a plurality of different flue gas flow rates are given, thereby obtaining the flue gas flow velocities at the measuring point positions under the plurality of different flue gas flow rates.

8. A computer device, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method according to any one of claims 1 to 4 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

Images