Dedusting pipe network flow prediction method and device based on one-dimensional simulation model

Abstract

The invention belongs to the technical field of dust removal pipe networks, and discloses a dust removal pipe network flow prediction method and device based on a one-dimensional simulation model, and the method comprises the steps: obtaining a design drawing and parameter information of a dust removal pipe network system of which the flow is to be predicted; splitting a layout map of each branch pipeline included in the design drawing, and establishing a one-dimensional simulation model of the dust removal pipe network system based on a splitting result; setting signal element information for a target pipe fitting model of the one-dimensional simulation model, and setting geometric boundary parameters for the pipe fitting model; performing simulation calculation on the flow of each branch pipeline model of the one-dimensional simulation model, and determining a total residual value in the simulation calculation process; under the condition that the total residual value is smaller than a preset residual value, the flow of each branch pipeline model is extracted from the simulation result of the one-dimensional simulation model, and the flow of each branch pipeline is obtained. According to the method, the one-dimensional simulation model is constructed on the one-dimensional simulation software, so that the flow of each branch pipeline of the dust removal pipe network system can be efficiently and accurately predicted.

Description

Technical Field

[0001] The present invention belongs to the technical field of dust removal pipe networks, and in particular relates to a method and device for predicting the flow rate of a dust removal pipe network based on a one-dimensional simulation model. Background Art

[0002] In the production process of metallurgy, cement and other industries, there are processes or procedures that emit dust into the environment. In order to prevent industrial dust from polluting the environment and ensure fresh air at the workstation, dust hoods are installed at the workstation where dust is emitted, and then the dust is transported to the dust removal equipment for centralized treatment through the dust removal pipe network system.

[0003] Usually, the dust collection pipe network system is connected to dozens or even hundreds of dust collection hoods running in parallel. The dust collection pipe network system has multiple branch pipes, and each branch pipe includes multiple pipe fittings, such as straight pipes, elbows, etc. In order to ensure that the air volume extracted by each dust collection hood meets the designed air volume, it is necessary to predict the flow rate of each branch pipe in the dust collection pipe network system.

[0004] In the related art, the method for predicting the flow of each branch pipe in the dust removal pipe network system is usually to obtain the flow of each branch pipe through a series of theoretical formulas and empirical formulas according to professional design manuals. This method of predicting the flow of each branch pipe has the problem of large amount of calculation and low accuracy of the calculated branch pipe flow. Summary of the invention

[0005] The purpose of the present invention is to efficiently and accurately predict the flow rates of each branch pipeline of a dust removal pipe network system.

[0006] In a first aspect, an embodiment of the present invention provides a method for predicting flow rate of a dust removal pipe network based on a one-dimensional simulation model, the method comprising:

[0007] Obtaining the design drawings and parameter information of the dust removal pipe network system for which the flow is to be predicted; the design drawings include the layout diagram of each branch pipe of the dust removal pipe network system; the parameter information includes the fluid parameter information, fan parameter information and valve parameter information of the dust removal pipe network system;

[0008] The layout diagrams of the branch pipes included in the design drawings are split to obtain split results; and a one-dimensional simulation model of the dust removal pipe network system is established based on the split results; the branch pipe models in the one-dimensional simulation model correspond one-to-one to the branch pipes in the design drawings, and the branch pipe models with corresponding relationships are the same as the layout diagrams of the branch pipes;

[0009] Based on the fan parameter information and the valve parameter information, signal element information is set for the target pipe fitting model of the one-dimensional simulation model, and geometric boundary parameters are set for the corresponding pipe fitting model based on the structural parameters of each pipe fitting in the design drawing; the target pipe fitting model includes a fan model and a valve model;

[0010] Based on the fluid parameter information, the signal element information and the geometric boundary parameters of the pipe model, simulate and calculate the flow of each branch pipeline model of the one-dimensional simulation model, and determine the total residual value of the simulation calculation process;

[0011] When the total residual value is less than the preset residual value, the flow of each branch pipeline model is extracted from the simulation result of the one-dimensional simulation model, and based on the correspondence between the branch pipeline model and the branch pipeline, the flow of each branch pipeline model is determined as the flow of the corresponding branch pipeline.

[0012] Optionally, the splitting of the layout diagrams of the branch pipes included in the design drawings to obtain splitting results; and establishing a one-dimensional simulation model of the dust removal pipe network system based on the splitting results, including:

[0013] Splitting the layout diagram of each branch pipeline included in the design drawing to obtain pipe fittings included in each branch pipeline;

[0014] For each branch pipeline, a pipe fitting model having the same number and structure as the pipe fittings included in the branch pipeline is established in a one-dimensional simulation software;

[0015] For each branch pipeline, according to the layout diagram of the branch pipeline, the pipe fitting model corresponding to the branch pipeline is connected through a transmission line to obtain the branch pipeline model corresponding to the branch pipeline; the transmission line is used to transmit the physical quantity of the previous pipe fitting model adjacent to the next pipe fitting model according to the fluid flow direction; the physical quantity includes fluid flow, temperature, pressure and heat flux;

[0016] The obtained multiple branch pipeline models are combined into a one-dimensional simulation model of the dust removal pipe network system.

[0017] Optionally, the pipe fittings obtained by splitting the layout diagram of each branch pipeline include basic pipe fittings, and the basic pipe fittings include straight pipe fittings, curved pipe fittings, reducer and reducer pipe fittings, tee pipe fittings and valve pipe fittings;

[0018] For each branch pipeline, a pipe fitting model having the same number and structure as the pipe fittings included in the branch pipeline is established in the one-dimensional simulation software, including:

[0019] For a target branch pipeline, directly establish a basic pipe fitting model corresponding to each basic pipe fitting included in the target branch pipeline; the target branch pipeline is any branch pipeline among the branch pipelines;

[0020] For the non-basic pipe fittings included in the target branch pipeline, multiple basic pipe fittings that can constitute the non-basic pipe fittings are determined, basic pipe fitting models of the multiple basic pipe fittings are established, and non-basic pipe fitting models corresponding to the non-basic pipe fittings are obtained by combining the multiple basic pipe fitting models.

[0021] Optionally, the simulating calculation of the flow of each branch pipeline model of the one-dimensional simulation model based on the fluid parameter information, the signal element information and the geometric boundary parameters of the pipe model includes:

[0022] For each branch pipeline model, based on the fluid parameter information corresponding to the branch pipeline model and the geometric boundary parameters of the inlet pipe model of the branch pipeline model, the mass flow rate, heat flux density and pipe resistance of the inlet pipe model are calculated;

[0023] The mass flow rate, heat flux density and pipe resistance of the inlet pipe fitting model are transmitted to the next pipe fitting model of the inlet pipe fitting model through a transmission line; wherein, when calculating the mass flow rate, heat flux density and pipe resistance of the pipe fitting model, if the pipe fitting model is a valve model, the calculation parameters also include signal element information of the valve model;

[0024] Calculate the mass flow rate, heat flux density and pipe resistance of the next pipe fitting model based on the fluid parameter information corresponding to the next pipe fitting model, the geometric boundary parameters of the pipe fitting model, and the mass flow rate, heat flux density and pipe resistance of the inlet pipe fitting model;

[0025] The mass flow rate, heat flux density and pipe resistance of the next pipe fitting model are transmitted to the next pipe fitting model adjacent thereto through the transmission line, and the mass flow rate, heat flux density and pipe resistance of the next pipe fitting model adjacent thereto are calculated until the mass flow rate, heat flux density and pipe resistance of the outlet pipe fitting model in the branch pipeline model are calculated;

[0026] The flow rate of the branch pipeline model is calculated based on the mass flow rate, heat flux density and pipe resistance of the outlet pipe model.

[0027] Optionally, before calculating the mass flow rate, heat flux density and pipe resistance of the inlet pipe fitting model based on the fluid parameter information corresponding to the branch pipe model and the geometric boundary parameters of the inlet pipe fitting model of the branch pipe model, the method further includes:

[0028] Get the start time, end time of the simulation calculation and the time interval for saving simulation data;

[0029] Starting from the start time, the step of calculating the mass flow rate, heat flux density and pipe resistance of the inlet pipe model based on the fluid parameter information corresponding to the branch pipe model and the geometric boundary parameters of the inlet pipe model of the branch pipe model is started;

[0030] After calculating the flow rate of the branch pipeline model, returning to the step of calculating the mass flow rate, heat flux density and pipe resistance of the inlet pipe fitting model based on the fluid parameter information corresponding to the branch pipeline model and the geometric boundary parameters of the inlet pipe fitting model of the branch pipeline model; and stopping the simulation calculation process when the time consumed by the simulation calculation process reaches the end time;

[0031] The flow rate of the branch pipeline model is saved at each time interval.

[0032] Optionally, when the total residual is greater than or equal to a preset residual value, the method further includes:

[0033] Stop the simulation calculation process and output simulation calculation error information; the simulation calculation error information includes the erroneous geometric boundary parameters of the target pipe fitting model; the target pipe fitting model is the pipe fitting model that causes the simulation calculation process error;

[0034] Acquire correct geometric boundary parameters of the target pipe fitting model;

[0035] The method of performing simulation calculation on the flow of each branch pipeline model of the one-dimensional simulation model based on the fluid parameter information, the signal element information and the geometric boundary parameters of the pipe model includes:

[0036] Based on the fluid parameter information, the signal element information and the correct geometric boundary parameters of the pipe model, the flow rates of the branch pipeline models of the one-dimensional simulation model are simulated and calculated.

[0037] In a second aspect, an embodiment of the present invention provides a dust removal pipe network flow prediction device based on a one-dimensional simulation model, the device comprising:

[0038] An information acquisition module, used to acquire design drawings and parameter information of the dust removal pipe network system for which the flow is to be predicted; the design drawings include the layout diagram of each branch pipe of the dust removal pipe network system; the parameter information includes fluid parameter information, fan parameter information and valve parameter information of the dust removal pipe network system;

[0039] A simulation model building module, used to split the layout diagrams of each branch pipeline included in the design drawing to obtain a split result; and to establish a one-dimensional simulation model of the dust removal pipe network system based on the split result; the branch pipeline models in the one-dimensional simulation model correspond one-to-one to the branch pipelines in the design drawing, and the branch pipeline models with corresponding relationships are the same as the layout diagrams of the branch pipelines;

[0040] A parameter setting module, configured to set signal element information for a target pipe fitting model of the one-dimensional simulation model based on the fan parameter information and the valve parameter information, and to set geometric boundary parameters for the corresponding pipe fitting model based on the structural parameters of each pipe fitting in the design drawing; the target pipe fitting model includes a fan model and a valve model;

[0041] A simulation calculation module, used to perform simulation calculation on the flow of each branch pipeline model of the one-dimensional simulation model based on the fluid parameter information, the signal element information and the geometric boundary parameters of the pipe model, and determine the total residual value of the simulation calculation process;

[0042] The flow acquisition module is used to extract the flow of each branch pipeline model from the simulation result of the one-dimensional simulation model when the total residual value is less than the preset residual value, and determine the flow of each branch pipeline model as the flow of the branch pipeline corresponding thereto based on the corresponding relationship between the branch pipeline model and the branch pipeline.

[0043] In a third aspect, an embodiment of the present invention provides an electronic device, including:

[0044] at least one processor;

[0045] a memory for storing the at least one processor-executable instruction;

[0046] The at least one processor is configured to execute the instructions to implement the method described in the first aspect.

[0047] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium. When instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the method described in the first aspect.

[0048] In a fifth aspect, an embodiment of the present invention provides a computer program product, including a computer program, and when the computer program is executed by a processor, the method described in the first aspect is implemented.

[0049] The technical solution provided by the embodiment of the present invention obtains the design drawings and parameter information of the dust removal pipe network system, and splits the layout diagram of each branch pipeline included in the design drawings to obtain various types of pipe fittings included in the dust removal pipe network system; based on the various types of pipe fittings obtained by splitting and the layout diagram of the design drawings, a one-dimensional simulation model of the dust removal pipe network system is established; signal element information is set for the fan model and valve model in the one-dimensional simulation model, and geometric boundary parameters are set for each pipe fitting model; then, the one-dimensional simulation software simulates and calculates each branch pipe model of the one-dimensional simulation model through fluid parameter information, signal element information and geometric boundary parameters of each pipe fitting model; when the total residual value of the simulation calculation process is less than the preset residual value, the simulation calculation converges, and the flow of each branch pipe model is extracted from the simulation result. Since the branch pipe model corresponds to the branch pipe of the dust removal pipe network system one-to-one, the flow of each branch pipe of the dust removal pipe network system is obtained. It can be seen that the present invention can achieve the purpose of efficiently and accurately predicting the flow of each branch pipe of the dust removal pipe network system by constructing a one-dimensional simulation model in the one-dimensional simulation software. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A schematic diagram of a dust removal pipe network flow prediction method based on a one-dimensional simulation model provided by the present invention;

[0051] Figure 2 Design drawings of the dust removal pipe network system for which the flow rate is to be predicted provided by the present invention;

[0052] Figure 3 A schematic diagram of the structure of the straight pipe provided by the present invention;

[0053] Figure 4 A schematic diagram of the structure of the bent pipe member provided by the present invention;

[0054] Figure 5 A schematic diagram of the structure of the reducer and reducer pipe fittings provided by the present invention;

[0055] FIG6(a) and FIG6(b) are schematic structural diagrams of a three-way pipe fitting provided by the present invention;

[0056] Figure 7 A schematic diagram of the structure of the valve pipe fitting provided by the present invention;

[0057] Figure 8 A schematic diagram of the structure of the throttling pipe provided by the present invention;

[0058] Fig. 9 for Figure 2 The one-dimensional simulation model corresponding to the design drawing shown;

[0059] Fig.10A flow chart of a dust removal pipe network flow prediction method based on a one-dimensional simulation model provided by an embodiment of the present invention;

[0060] Fig.11 for Fig.10 A flowchart of a specific implementation method of S1020;

[0061] Fig.12 for Fig.10 A flowchart of a specific implementation method of S1040;

[0062] Fig.13 A schematic structural diagram of a dust removal pipe network flow prediction device based on a one-dimensional simulation model provided by an embodiment of the present invention;

[0063] Fig.14 A schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0064] The present invention will be described in detail below through examples.

[0065] In the production process of metallurgy, cement and other industries, there are processes or procedures that emit dust into the environment. In order to prevent industrial dust from polluting the environment and ensure fresh air at the workstation, dust hoods are installed at the workstation where dust is emitted, and then the dust is transported to the dust removal equipment for centralized treatment through the dust removal pipe network system.

[0066] Usually, the dust collection pipe network system is connected to dozens or even hundreds of dust collection hoods running in parallel. The dust collection pipe network system has multiple branch pipes, and each branch pipe includes multiple pipe fittings, such as straight pipes, elbows, etc. In order to ensure that the air volume extracted by each dust collection hood meets the designed air volume, it is necessary to optimize the design of each pipe fitting that constitutes the pipe network system. For example, straight pipes, tees, elbows, valves, and resistance balancers can be optimized to balance the resistance of each branch pipe in the dust collection pipe network system. This requires predicting the flow of each branch pipe in the dust collection pipe network system. However, in a sense, the dust collection pipe network system can be regarded as a complex "black box" model. At present, it is still a difficult problem to accurately predict the flow of each branch pipe in the dust collection pipe network system. At present, there are mainly three methods for predicting the flow of dust collection pipe network: the first method is to obtain the flow of each branch pipe of the dust collection pipe network system through a series of theoretical formulas and empirical formulas according to the professional design manual. This method of predicting the flow of each branch pipe of the dust collection pipe network system has the problem of large calculation amount and low accuracy of the calculated branch pipe flow. The second method is to use computational fluid dynamics software to simulate and calculate the flow rate of each branch pipe of the dust removal pipe network system. The method of computational fluid dynamics software can be used to obtain the airflow state inside the dust removal pipe network system, but there are technical problems such as the large workload required for modeling, high requirements for hardware configuration, and long working cycle. The third method is to use historical operation data to train the prediction model, and use the trained prediction model to predict the flow rate of each branch pipe of the dust removal pipe network system. However, this method requires a large amount of historical operation data support to ensure the accuracy of the prediction. On the one hand, most projects do not have online detection devices designed. On the other hand, the prediction model is not suitable for newly built dust removal pipe network systems. This method is mostly used for the operation control optimization of the dust removal pipe network system after completion.

[0067] To this end, the present invention provides a method for predicting the flow rate of a dust removal pipe network based on a one-dimensional simulation model, by obtaining the design drawings of the dust removal pipe network system, performing key decomposition on the design drawings, and constructing pipe fitting models of various types of pipe fittings on a one-dimensional simulation software, obtaining a one-dimensional simulation model of the dust removal pipe network system, and performing simulation calculation on the flow rate of each branch pipe model of the one-dimensional simulation model, so as to quickly and accurately predict the flow rate of each branch pipe of the dust removal pipe network system, and then quickly and accurately predict the air volume extracted by each dust collecting hood connected to the dust removal pipe network. At the same time, the scheme provided by the embodiment of the present invention is simple to adjust the pipe fitting parameters, supports rapid adjustment calculation of multiple schemes and multiple working conditions, and has the advantages of high design work efficiency and high prediction accuracy.

[0068] like Figure 1 As shown, it is a schematic diagram of a dust removal pipe network flow prediction method based on a one-dimensional simulation model provided by the present invention, and its workflow is mainly divided into three stages: data digestion, simulation process and result analysis.

[0069] The first stage is the data digestion stage. Specifically, the data digestion stage mainly collects the design drawings and parameter information of the dust collection pipe network system for the flow to be predicted. The design drawings include the pipeline layout diagram from the dust collection hood of each station to the dust collector. Since there are usually multiple dust collection hoods and multiple branch pipes of the dust collection pipe network system, the design drawings include the layout diagram of each branch pipe of the dust collection pipe network system. For example, Figure 2 As shown in the figure, it is a design drawing of the dust removal pipe network system for which the flow is to be predicted. It can be seen from the design drawing that the dust removal pipe network system includes 7 branch pipes, namely branch pipe 1 (referred to as branch pipe 1), branch pipe 2 (referred to as branch pipe 2), branch pipe 3 (referred to as branch pipe 3), branch pipe 4 (referred to as branch pipe 4), branch pipe 5 (referred to as branch pipe 5), branch pipe 6 (referred to as branch pipe 6) and branch pipe 7 (referred to as branch pipe 7). Among them, Figure 2 The number 1 in the figure indicates a straight pipe fitting, the number 2 indicates a valve pipe fitting, the number 3 indicates a bent pipe fitting, the number 4 indicates a three-way pipe fitting, and the number 5 indicates a throttling pipe fitting. In other words, the dust removal pipe network system is composed of multiple straight pipe fittings, multiple valve pipe fittings, multiple bent pipe fittings, multiple three-way pipe fittings, and multiple throttling pipe fittings.

[0070] The parameter information of the dust removal pipe network system mainly includes fluid parameter information, fan parameter information and valve parameter information. The fluid parameter information includes the physical properties of the fluid such as density, specific heat capacity, viscosity, thermal conductivity, temperature, pressure, etc. The fluid can be air or flue gas; the fan parameter information mainly includes the change relationship between the fan pressure and time; the valve parameter information mainly includes the type and opening of the valve. Figure 1 As shown, parameter information of fluid, fan, valve, etc. can be used to set boundary conditions in the simulation stage, that is, parameter information is part of the input of the simulation process.

[0071] The second stage is the simulation process stage. Figure 1 As shown in the figure, the simulation process includes five steps: disassembling into various types of pipe fittings, establishing a one-dimensional simulation model, setting boundary conditions, setting solution parameters, and iterative calculation convergence. The details are as follows:

[0072] (1) Disassemble into various types of pipe fittings. Specifically, according to the design drawings of the dust removal pipe network system, the pipe fittings included in each branch pipeline of the dust removal pipe network system are disassembled into straight pipe fittings, bent pipe fittings, reducer and reducer pipe fittings, tee pipe fittings, valve pipe fittings, etc. Figures 3 to 7 As shown, Figure 3 It is the structural diagram of the straight pipe. Figure 3 D h is the hydraulic diameter of the straight pipe, l is the flow section length of the straight pipe, inlet represents the inlet of the straight pipe, and outlet represents the outlet of the straight pipe. Figure 4The diagram shows the structure of the bent pipe. h is the hydraulic diameter of the elbow, r c is the radius of curvature of the curved pipe, δ is the central angle of the curved pipe, inlet represents the inlet of the straight pipe, and outlet represents the outlet of the straight pipe. Figure 5 The figure shows the schematic diagram of the structure of the reducer and reducer pipe fittings, D1 is the narrow diameter of the reducer and reducer pipe fittings, D2 is the flared diameter of the reducer and reducer pipe fittings, α is the total aperture angle, inlet represents the inlet of the straight pipe fitting, and outlet represents the outlet of the straight pipe fitting. As shown in Figure 6(a) and Figure 6(b), the schematic diagram of the structure of the three-way pipe fittings, D c is the diameter of the main pipe, D1 is the diameter of branch pipe 1, D2 is the diameter of branch pipe 2, α is the angle between the main pipe and the branch pipe, inlet represents the inlet of the tee pipe fitting, outlet represents the outlet of the tee pipe fitting, v c is the fluid velocity in the main pipeline. Figure 7 The diagram shows the structure of valve fittings. vavle is the valve diameter and D of the valve fitting sharft is the butterfly valve shaft diameter, is the opening and closing angle of the butterfly valve, inlet represents the inlet of the valve fitting, and outlet represents the outlet of the valve fitting. Figures 3 to 7 The following are the basic pipes included in the dust removal pipe network system. For more complex super pipes, such as Figure 8 The throttling pipe fitting shown in the figure can be composed of two reducer pipe fittings and a straight pipe fitting. Figure 8 Straight and expanding tubes are shown in Figure .

[0073] (2) Establish a one-dimensional simulation model. According to the design drawings of the dust removal pipe network system, after disassembling various types of pipe fittings, a pipe fitting model with the same number and structure as the dust removal pipe network system can be established in the one-dimensional simulation software. According to the connection method of the pipe fittings in the design drawings, each pipe fitting model can be connected by constructing a transmission line to form a one-dimensional simulation model with the same layout as the design drawings of the dust removal pipe network system, such as Fig. 9 Shown Figure 2The one-dimensional simulation model corresponding to the design drawing shown. The transmission line can be constructed to transmit the physical quantities such as mass flow, temperature, pressure, heat flux, heat flux density and pipe resistance between adjacent pipes, satisfying the laws of conservation of mass, momentum and energy. That is to say, each pipe model is equivalent to a calculation unit. First, the unit calculation is performed. For a pipe model, after the mass flow, heat flux, temperature, heat flux density and pipe resistance of the pipe model are calculated, these physical quantities are transmitted to the next pipe model through the transmission line. After the next pipe model absorbs these physical quantities, the mass flow, heat flux, temperature, heat flux density and pipe resistance of the next pipe model are calculated, and the mass flow, heat flux, temperature, heat flux density and pipe resistance of the next pipe model are transmitted to the next pipe model adjacent to it through the transmission line until the physical quantities of the outlet pipe model of the dust removal pipe network system are calculated, and the flow of each branch pipe of the dust removal pipe network system is calculated based on the physical quantities of the outlet pipe model.

[0074] (3) Set boundary conditions. After establishing the one-dimensional simulation model, signal element information can be set on the fan and valve fittings. Signal element information implements linear and nonlinear input settings according to changes in a certain parameter. It can be a constant value, function value, periodic value, table value, etc. It is a dimensionless value and can be compatible with all physical units. Specifically, for fan pressure, in actual working conditions, if the fan pressure is a variable frequency signal, then the function signal can be set; if the fan pressure is not a variable frequency signal, then the constant signal can be set. For valve opening, in actual applications, if it is not a special working condition, a constant value can be set, for example, 90 degrees. If it is a special working condition, then a signal element can be set to change the valve opening. For example, the valve opening can change over time.

[0075] For each type of pipe fittings in the one-dimensional simulation model, it is necessary to set boundary physical quantities. In addition to the initially set fluid parameter information, these boundary physical quantities also require the setting of geometric boundary parameters. In addition, during the simulation calculation process, the fluid parameter information, signal element information and geometric boundary parameters are used to calculate the mass flow rate, heat flux density and pipe fitting resistance. The following is a detailed description of the geometric boundary parameters of different types of pipe fittings and the main formulas for calculating the mass flow rate, heat flux density and pipe fitting resistance.

[0076] ①Straight pipe fittings

[0077] The geometric shape of the straight pipe can be round or square. If the straight pipe is a round pipe, the geometric boundary parameters include the inner diameter D of the pipe. h and the pipe length l; if the straight pipe is a square pipe, the geometric boundary parameters include the width w and height h of the pipe.

[0078] The formula for calculating mass flow rate m is:

[0079]

[0080] Where A is the flow area in m 2 , C q is the flow coefficient, which is a dimensionless coefficient; P up is the upstream pressure, in Pa; T up is the upstream temperature; C m is the mass flow parameter, the unit is (kg.K / J) 1 / 2 .

[0081] The main formula for calculating heat flux h is:

[0082] h=k·A ext ·(T ext -T)

[0083] Where k is the heat exchange coefficient, the unit is J / (s·m 2 ·K); A ext is the heat exchange area, in m 2 ; T ext is the external temperature, in K; T is the fluid temperature, in K.

[0084] The main formula for calculating the pipe resistance Δp is:

[0085]

[0086] Where λ is the friction coefficient, dimensionless; D h is the hydraulic diameter of the straight pipe, in m; l is the flow section length of the straight pipe, in m; ρ is the fluid density, in kg / m 3 ; Q is the volume flow rate, unit is m 3 / s; A min is the minimum cross-sectional area in m 2 .

[0087] ②Bending pipe fittings

[0088] The geometric shape of the bent pipe can be a round pipe or a square pipe; the geometric boundary parameters include: the curvature radius r of the bent pipe c , the central angle δ, and the hydraulic diameter D h .

[0089] For curved pipes, the main formulas for calculating mass flow, heat flux and pipe resistance in one-dimensional simulation software are basically the same as those for straight pipes. However, the resistance coefficient of curved pipes is not the friction resistance coefficient λ, but the local resistance coefficient ζ.

[0090]

[0091] Among them, A1 is the geometric parameter function of the bending center angle δ; B1 is the relative radius of curvature r crel The geometric parameter function of the circular cross section r crel =r c / D0, rectangular cross section r crel =r c / b0; C1 is the geometric parameter function of the ratio of the height to the width of the curved section a0 / b0. For a circular section, C1 = 1. k Re is a function that depends on the Reynolds number and the relative radius of curvature r crel δ is converted from degrees to radians by the factor 180 / π. λ is the conventional friction factor obtained from the relative roughness (rr), Nikuradse's lemma and the cross-sectional geometry.

[0092] ③Size and size pipe fittings

[0093] The geometric boundary parameters include: total aperture angle α, expansion diameter D2 and contraction diameter D1.

[0094] Among them, for the large and small pipe fittings, the main formulas for calculating mass flow, heat flux and pipe resistance in the one-dimensional simulation software are basically the same as those for calculating mass flow, heat flux and pipe resistance in straight pipe fittings. However, the pipe resistance coefficient is not the friction resistance coefficient λ, but the local resistance coefficient ζ fr .

[0095] Where D2 is the flared diameter in mm, D1 is the narrow diameter in mm, α is the total aperture angle in degrees, and λ is the conventional friction factor obtained from the relative roughness (rr), Nikuradse's lemma and cross-sectional geometry.

[0096] ④Tee pipe fittings

[0097] The geometric boundary parameters are: main pipe diameter D c , the diameter D1 of branch pipe 1, the diameter D2 of branch pipe 2, and the angle α between the main pipe and the branch pipe.

[0098] For three-way pipe fittings, the main formulas for calculating mass flow, heat flux and pipe resistance in one-dimensional simulation software are basically the same as those for calculating mass flow, heat flux and pipe resistance in straight pipe fittings. However, the pipe resistance coefficient is not the friction resistance coefficient λ, but the local resistance coefficients ζ1 and ζ2. Among them, the one-dimensional simulation software can obtain the local resistance coefficients ζ1 and ζ2 through the pre-built-in parameter table by interpolation method.

[0099]

[0100] Among them, Δp1 and Δp2 are the resistances of the two branch pipes, in Pa; v c is the fluid velocity of the main pipeline, in m / s; ζ1 and ζ2 are the resistance coefficients of the two branch pipelines, respectively, and are dimensionless.

[0101] ⑤Valve fittings

[0102] Geometric boundary parameters include: valve diameter D vavle And butterfly valve shaft diameter D sharft And the opening and closing angle of the butterfly valve

[0103] For valves, the main formulas for calculating mass flow, heat flux and pipe resistance in one-dimensional simulation software are basically the same as those for calculating mass flow, heat flux and pipe resistance in straight pipes. However, they should also satisfy the following equations:

[0104]

[0105] Among them, C q and C m is the control coefficient calculated by the one-dimensional simulation software through the above two formulas; γ=C p / C v is the specific heat ratio, C p is the reference specific heat at constant pressure, C v is the specific heat at constant volume; P cr is the critical pressure ratio; p up is the total upstream pressure, in Pa; p dn is the total downstream pressure, in Pa.

[0106] ⑥Super pipe fittings

[0107] For more complex super pipe fittings, when setting their geometric boundary parameters, it is necessary to set the geometric boundary parameters of multiple basic pipe fittings that make up the super pipe fitting, and calculate the mass flow, heat flux density and pipe resistance of the super pipe fitting through the calculation formula corresponding to the basic pipe fitting.

[0108] It should be noted that those skilled in the art should be able to understand that the parameters included in the above formula can be directly or indirectly obtained by one-dimensional simulation software through fluid parameter information, signal element information and geometric boundary parameters, and will not be repeated here.

[0109] (4) Setting the solution control parameters. Specifically, after obtaining the one-dimensional simulation model of the dust removal pipe network system and setting the fluid parameter information, fan parameter information and valve parameter information, as well as the geometric boundary parameters of each pipe model, the simulation calculation process of the one-dimensional simulation model can be started. Before performing the simulation calculation, the solution control parameters can be set. The solution control parameters may include the start time of the simulation calculation, the end time of the simulation calculation, and the time interval for saving the simulation data. For example, the start time of the simulation calculation is set to 0s, the end time of the simulation calculation is set to 200s, and the time interval for saving the simulation data is set to 0.01s. After setting the solution control parameters, the simulation calculation process can be started, that is, the flow of each branch pipe model of the dust removal pipe network system can be simulated and calculated.

[0110] (5) Iterative calculation converges. Specifically, a preset residual value can be set in advance. For example, the preset residual value can be 1×10 -7 . The one-dimensional simulation software will calculate a total residual value each time it performs a flow simulation calculation on the one-dimensional simulation model. After obtaining the total residual value, the total residual value can be compared with the preset residual value. If the total residual value is less than the preset residual value, it means that the iterative calculation has reached convergence. If the total residual value is greater than or equal to the preset residual value, it means that the iterative calculation has not reached convergence. At this time, the one-dimensional simulation software will report a program error. It is necessary to detect whether the geometric boundary parameters of the pipe fitting model are set incorrectly, and adjust the geometric boundary parameters of the pipe fitting model with incorrect settings, and then restart the simulation calculation process.

[0111] The above-mentioned total residual value is a key process control parameter in the integral calculation of the simulation process. It is caused by the error generated by using approximate methods instead of precise analytical expressions in implicit calculations. In order to ensure the accuracy of the simulation results, the residual value is preset to prevent excessive error accumulation from adversely affecting the simulation accuracy.

[0112] 3. Result analysis stage. After the simulation calculation process of the one-dimensional simulation software converges iteratively, the simulation results are determined and analyzed. The result analysis stage is to extract the flow of each branch pipe model from the simulation results. Since each branch pipe model corresponds to a branch pipe of the dust removal pipe network system, the flow of each branch pipe of the dust removal pipe network system can be obtained. In addition, from the simulation results, the operating status information of each pipe fitting, such as wind speed, inlet and outlet pressure, and inlet and outlet temperature, can also be extracted.

[0113] The technical solution provided by the embodiment of the present invention obtains the design drawings and parameter information of the dust removal pipe network system, and splits the layout diagram of each branch pipeline included in the design drawings to obtain various types of pipe fittings included in the dust removal pipe network system; based on the various types of pipe fittings obtained by splitting and the layout diagram of the design drawings, a one-dimensional simulation model of the dust removal pipe network system is established; signal element information is set for the fan model and valve model in the one-dimensional simulation model, and geometric boundary parameters are set for each pipe fitting model; then, the one-dimensional simulation software simulates and calculates each branch pipe model of the one-dimensional simulation model through fluid parameter information, signal element information and geometric boundary parameters of each pipe fitting model; when the total residual value of the simulation calculation process is less than the preset residual value, the simulation calculation converges, and the flow of each branch pipe model is extracted from the simulation result. Since the branch pipe model corresponds to the branch pipe of the dust removal pipe network system one-to-one, the flow of each branch pipe of the dust removal pipe network system is obtained. It can be seen that the present invention can achieve the purpose of efficiently and accurately predicting the flow of each branch pipe of the dust removal pipe network system by constructing a one-dimensional simulation model in the one-dimensional simulation software.

[0114] like Fig.10 As shown, a dust removal pipe network flow prediction method based on a one-dimensional simulation model is provided in an embodiment of the present invention. The dust removal pipe network flow prediction method based on a one-dimensional simulation model can be applied to an electronic device installed with a one-dimensional simulation software, and specifically may include the following steps:

[0115] S1010, obtaining design drawings and parameter information of the dust removal pipe network system for which the flow rate is to be predicted.

[0116] The design drawings include the layout of each branch pipeline of the dust removal pipe network system, and the parameter information includes the fluid parameter information, fan parameter information and valve parameter information of the dust removal pipe network system.

[0117] Specifically, since there are usually multiple dust hoods and multiple branch pipes of the dust removal pipe network system, the design drawings include the layout diagrams of the various branch pipes of the dust removal pipe network system. The parameter information of the dust removal pipe network system mainly includes fluid parameter information, fan parameter information and valve parameter information, wherein the fluid parameter information includes the density, specific heat capacity, viscosity, thermal conductivity, temperature, pressure and other physical properties of the fluid, wherein the fluid can be air or flue gas; the fan parameter information mainly includes the change relationship between the fan pressure and time; the valve parameter information mainly includes the type and opening of the valve.

[0118] S1020, splitting the layout diagram of each branch pipeline included in the design drawing to obtain a split result, and establishing a one-dimensional simulation model of the dust removal pipe network system based on the split result.

[0119] The branch pipeline model in the one-dimensional simulation model corresponds one-to-one to the branch pipeline in the design drawing, and the branch pipeline model having the corresponding relationship is the same as the layout drawing of the branch pipeline.

[0120] Specifically, according to the design drawings of the dust removal pipe network system, the pipe fittings included in each branch pipe of the dust removal pipe network system are disassembled into basic pipe fittings such as straight pipe fittings, bent pipe fittings, reducer and reducer pipe fittings, tee pipe fittings, valve fittings, etc.; for complex super pipe fittings, they can be obtained by combining basic pipe fittings.

[0121] After splitting to obtain multiple pipe fittings, for each pipe fitting, a corresponding pipe fitting model can be established. That is to say, if the pipe fitting is a straight pipe fitting, then a straight pipe fitting model is established; if the pipe fitting is a curved pipe fitting, then a curved pipe fitting model is established. In short, corresponding models need to be established for all the pipe fittings obtained by splitting. Since the design drawing has multiple branch pipes, multiple branch pipe models need to be established. For example, if the design drawing includes 7 branch pipes, 7 branch pipe models need to be established, and the branch pipe models in the one-dimensional simulation model correspond one-to-one to the branch pipes in the design drawing, and the branch pipe models with corresponding relationships are the same as the layout diagram of the branch pipes. Finally, a one-dimensional simulation model that is exactly the same as the design drawing layout of the dust removal pipe network system is formed. In order to describe the scheme clearly, the specific implementation method of S1020 will be described in detail in the following embodiments.

[0122] S1030, based on the fan parameter information and the valve parameter information, signal element information is set for the target pipe fitting model of the one-dimensional simulation model, and geometric boundary parameters are set for the corresponding pipe fitting model based on the structural parameters of each pipe fitting in the design drawing. The target pipe fitting model includes a fan model and a valve model.

[0123] After establishing the one-dimensional simulation model, it is necessary to set boundary conditions, which are the parameter inputs of the one-dimensional simulation software. Boundary conditions can be roughly divided into two categories: the first category is signal component information, and the second category is geometric boundary parameters.

[0124] Specifically, signal element information can be set on fans and valve fittings. Signal element information implements linear and nonlinear input settings according to changes in a certain parameter, which can be constant values, function values, periodic values, table values, etc. It is a dimensionless value and can be compatible with all physical units. Specifically, for fan pressure, in actual working conditions, if the fan pressure is a variable frequency signal, then the function signal can be set; if the fan pressure is not a variable frequency signal, then the constant signal can be set. For valve opening, in actual applications, if it is not a special working condition, a constant value can be set, for example, 90 degrees. If it is a special working condition, then a signal element can be set to change the valve opening. For example, the valve opening can change over time.

[0125] For each type of pipe fitting model in the one-dimensional simulation model, it is necessary to set geometric boundary parameters. Among them, the geometric boundary parameters of the pipe fitting models corresponding to straight pipe fittings, bent pipe fittings, reducer and reducer pipe fittings, tee pipe fittings, valve pipe fittings and super pipe fittings have been explained in detail in the above embodiments and will not be repeated here.

[0126] S1040, based on the fluid parameter information, the signal element information and the geometric boundary parameters of the pipe model, simulate and calculate the flow of each branch pipeline model of the one-dimensional simulation model, and determine the total residual value of the simulation calculation process.

[0127] Specifically, the one-dimensional simulation software takes the fluid parameter information, signal element information and the geometric boundary parameters of each pipe model as input, and automatically executes the flow simulation calculation process for each branch pipeline model of the one-dimensional simulation model. In practical applications, the start time and end time of the simulation calculation process can be set, and multiple rounds of simulation calculations can be performed within the time interval between the start time and the end time. Each simulation calculation will correspond to a total residual value, so that in subsequent steps, the total residual value can be compared with the preset residual value to determine whether the simulation calculation has reached convergence. In order to clearly describe the scheme, the specific implementation method of step S1040 will be described in detail in the following embodiments.

[0128] S1050, when the total residual value is less than the preset residual value, extract the flow of each branch pipeline model from the simulation result of the one-dimensional simulation model, and based on the correspondence between the branch pipeline model and the branch pipeline, determine the flow of each branch pipeline model as the flow of the branch pipeline corresponding thereto.

[0129] Specifically, a preset residual value may be preset, for example, the preset residual value may be 1×10 -7 . Each time the one-dimensional simulation software performs a flow simulation calculation on the one-dimensional simulation model, a total residual value will be calculated. After obtaining the total residual value, the total residual value can be compared with the preset residual value. If the total residual value is less than the preset residual value, it means that the iterative calculation has reached convergence, and the flow accuracy of each branch pipeline model of the dust removal pipe network system saved in the simulation results is relatively high. Therefore, the flow of each branch pipeline model can be extracted from the simulation results. Moreover, each branch pipeline model corresponds to a branch pipeline, that is, the flow of each branch pipeline of the dust removal pipe network system can be obtained. For example, the design drawing includes 7 branch pipelines, then the one-dimensional simulation model includes 7 branch pipeline models. After accurately obtaining the flow of the 7 branch pipeline models, the flow of the 7 branch pipelines can be accurately obtained.

[0130] In one embodiment, when the total residual is greater than a preset residual value, the dust removal pipe network flow prediction method based on the one-dimensional simulation model may further include the following steps, namely, step 1 to step 2:

[0131] Step 1: Stop the simulation process and output the simulation error information.

[0132] The simulation calculation error information includes the erroneous geometric boundary parameters of the target pipe fitting model. The target pipe fitting model is the pipe fitting model that causes the simulation calculation process to report an error.

[0133] Step 2: Obtain the correct geometric boundary parameters of the target pipe model.

[0134] At this time, S1040, based on the fluid parameter information, the signal element information and the geometric boundary parameters of the pipe model, the flow of each branch pipe model of the one-dimensional simulation model is simulated and calculated, including:

[0135] Based on the fluid parameter information, signal element information and the correct geometric boundary parameters of the pipe model, the flow of each branch pipeline model of the one-dimensional simulation model is simulated and calculated.

[0136] If the total residual value is greater than or equal to the preset residual value, it means that the iterative calculation has not reached convergence, and the one-dimensional simulation software reports a program error and outputs an error message, which may include the wrong geometric boundary parameters of the target pipe model. The target pipe model is the pipe model that causes the simulation calculation process to report an error. The geometric boundary parameters of the pipe model with the wrong setting are adjusted, and then the simulation calculation process is restarted.

[0137] The technical solution provided by the embodiment of the present invention obtains the design drawings and parameter information of the dust removal pipe network system, and splits the layout diagram of each branch pipeline included in the design drawings to obtain various types of pipe fittings included in the dust removal pipe network system; based on the various types of pipe fittings obtained by splitting and the layout diagram of the design drawings, a one-dimensional simulation model of the dust removal pipe network system is established; signal element information is set for the fan model and valve model in the one-dimensional simulation model, and geometric boundary parameters are set for each pipe fitting model; then, the one-dimensional simulation software simulates and calculates each branch pipe model of the one-dimensional simulation model through fluid parameter information, signal element information and geometric boundary parameters of each pipe fitting model; when the total residual value of the simulation calculation process is less than the preset residual value, the simulation calculation converges, and the flow of each branch pipe model is extracted from the simulation result. Since the branch pipe model corresponds to the branch pipe of the dust removal pipe network system one-to-one, the flow of each branch pipe of the dust removal pipe network system is obtained. It can be seen that the present invention can achieve the purpose of efficiently and accurately predicting the flow of each branch pipe of the dust removal pipe network system by constructing a one-dimensional simulation model in the one-dimensional simulation software.

[0138] In one embodiment, Fig.11 As shown, S1020, splitting the layout diagram of each branch pipeline included in the design drawing to obtain a split result; and establishing a one-dimensional simulation model of the dust removal pipe network system based on the split result, which may include the following steps:

[0139] S1021, splitting the layout diagram of each branch pipeline included in the design drawing to obtain pipe fittings included in each branch pipeline.

[0140] Specifically, after obtaining the design drawings of the dust removal pipe network system, which usually involve layout drawings of multiple branch pipes, the layout drawings of the multiple branch pipes can be split to obtain the pipe fittings included in each branch pipe. Figure 2 The design drawing shown includes 7 branch pipes, so the layout drawings of the 7 branch pipes can be split.

[0141] S1022: For each branch pipeline, a pipe fitting model having the same number and structure as the pipe fittings included in the branch pipeline is established in a one-dimensional simulation software.

[0142] Specifically, according to the design drawings of the dust removal pipe network system, after disassembling various types of pipe fittings, a pipe fitting model with the same number and structure as the dust removal pipe network system can be established in one-dimensional simulation software.

[0143] As an implementation method of the embodiment of the present disclosure, the pipe fittings obtained by splitting the layout diagram of each branch pipeline include basic pipe fittings, and the basic pipe fittings include straight pipe fittings, curved pipe fittings, reducer pipe fittings, tee pipe fittings and valve pipe fittings. At this time, S1022, for each branch pipeline, a pipe fitting model with the same number and structure as the pipe fittings included in the branch pipeline is established in a one-dimensional simulation software, which may include the following steps, namely step a1 and step a2:

[0144] Step a1: directly establish a basic pipe fitting model corresponding to each basic pipe fitting included in the target branch pipe for the target branch pipe. The target branch pipe is any branch pipe among the branch pipes.

[0145] Step a2, for the non-basic pipe fittings included in the target branch pipeline, determine multiple basic pipe fittings that can constitute the non-basic pipe fittings, establish basic pipe fitting models of the multiple basic pipe fittings, and obtain the non-basic pipe fitting model corresponding to the non-basic pipe fitting by combining the multiple basic pipe fitting models.

[0146] Specifically, for basic pipe fittings such as straight pipe fittings, bent pipe fittings, reducer pipe fittings, tee pipe fittings and valve pipe fittings, the one-dimensional simulation software can respectively establish straight pipe fitting models, bent pipe fitting models, reducer pipe fitting models, tee pipe fitting models and valve pipe fitting models. For other relatively complex non-basic pipe fittings other than basic pipe fittings, we can first determine the multiple basic pipe fittings that make up the non-basic pipe fittings, establish the basic pipe fitting models of the multiple basic pipe fittings, and obtain the non-basic pipe fitting models corresponding to the non-basic pipe fittings by combining the multiple basic pipe fitting models. This achieves the purpose of simple design and rapid construction of a one-dimensional simulation model.

[0147] S1023, for each branch pipeline, according to the layout diagram of the branch pipeline, connect the pipe fitting model corresponding to the branch pipeline through the transmission line to obtain the branch pipeline model corresponding to the branch pipeline.

[0148] S1024, combining the obtained multiple branch pipeline models into a one-dimensional simulation model of the dust removal pipe network system.

[0149] The transmission line is used to transmit the physical quantity of the previous pipe model adjacent to the next pipe model according to the fluid flow direction. The physical quantity includes fluid flow, temperature, pressure and heat flux.

[0150] Specifically, after establishing pipe models with the same number and structure as the dust removal pipe network system in the one-dimensional simulation software, the various pipe models can be connected by constructing transmission lines according to the connection method of the pipes in the design drawings to form a one-dimensional simulation model that is exactly the same as the design drawing layout of the dust removal pipe network system. The constructed transmission line can transmit physical quantities such as mass flow, temperature, pressure, heat flux, heat flux density and pipe resistance between adjacent pipe fittings, satisfying the laws of conservation of mass, momentum and energy. That is to say, each pipe fitting model is equivalent to a calculation unit. First, the unit calculation is performed. For a pipe fitting model, after the physical quantities such as mass flow, heat flux, temperature, heat flux density and pipe resistance of the pipe fitting model are calculated, these physical quantities are transmitted to the next pipe fitting model through the transmission line. After the next pipe fitting model absorbs these physical quantities, the physical quantities such as mass flow, heat flux, temperature, heat flux density and pipe resistance of the next pipe fitting model are calculated, and the physical quantities such as mass flow, heat flux, temperature, heat flux density and pipe resistance of the next pipe fitting model are transmitted to the next pipe fitting model adjacent to it through the transmission line until the physical quantities of the outlet pipe fitting model of the dust removal pipe network system are calculated, and the flow of each branch pipeline of the dust removal pipe network system is calculated based on the physical quantities of the outlet pipe fitting model.

[0151] It can be seen that this embodiment obtains the splitting result by splitting the layout diagram of each branch pipeline included in the design drawing; and based on the splitting result, a one-dimensional simulation model that is exactly the same as the design drawing layout of the dust removal pipe network system is established, which can accurately predict the flow of each branch pipeline of the dust removal pipe network.

[0152] As an implementation method of the embodiment of the present invention, S1040, based on the fluid parameter information, the signal element information and the geometric boundary parameters of the pipe model, the flow of each branch pipe model of the one-dimensional simulation model is simulated and calculated, such as Fig.12 As shown, the following steps may be included:

[0153] S1041, for each branch pipeline model, based on the fluid parameter information corresponding to the branch pipeline model and the geometric boundary parameters of the inlet pipe model of the branch pipeline model, calculate the mass flow rate, heat flux density and pipe resistance of the inlet pipe model.

[0154] Specifically, in Figure 1 In the illustrated embodiment, the formulas for calculating mass flow rate, heat flux density and pipe resistance using one-dimensional simulation software have been described in detail for five basic pipe fittings, namely, straight pipe fittings, bent pipe fittings, reducer and reducer pipe fittings, tee pipe fittings and valve pipe fittings, and will not be repeated here.

[0155] S1042, transmitting the mass flow, heat flux density and pipe resistance of the inlet pipe model to the next pipe model of the inlet pipe model through the transmission line. When calculating the mass flow, heat flux density and pipe resistance of the pipe model, if the pipe model is a valve model, the calculation parameters also include signal element information of the valve model.

[0156] S1043, based on the fluid parameter information corresponding to the next pipe model, the geometric boundary parameters of the pipe model, and the mass flow rate, heat flux density and pipe resistance of the inlet pipe model, calculate the mass flow rate, heat flux density and pipe resistance of the next pipe model.

[0157] S1044, the mass flow rate, heat flux density and pipe resistance of the next pipe fitting model are transmitted to the next pipe fitting model adjacent thereto through the transmission line, and the mass flow rate, heat flux density and pipe resistance of the next pipe fitting model adjacent thereto are calculated until the mass flow rate, heat flux density and pipe resistance of the outlet pipe fitting model in the branch pipeline model are calculated.

[0158] S1045, based on the mass flow rate, heat flux density and pipe resistance of the outlet pipe model, calculate the flow rate of the branch pipe model.

[0159] Specifically, the constructed transmission line can transmit physical quantities such as mass flow, temperature, pressure, heat flux, heat flux density and pipe resistance between adjacent pipe fittings, satisfying the laws of conservation of mass, momentum and energy. That is to say, each pipe fitting model is equivalent to a calculation unit. First, the unit calculation is performed. For a pipe fitting model, after the physical quantities such as mass flow, heat flux, temperature, heat flux density and pipe resistance of the pipe fitting model are calculated, these physical quantities are transmitted to the next pipe fitting model through the transmission line. After the next pipe fitting model absorbs these physical quantities, the physical quantities such as mass flow, heat flux, temperature, heat flux density and pipe resistance of the next pipe fitting model are calculated, and the physical quantities such as mass flow, heat flux, temperature, heat flux density and pipe resistance of the next pipe fitting model are transmitted to the next adjacent pipe fitting model through the transmission line until the physical quantities of the outlet pipe fitting model of the dust removal pipe network system are calculated, and the flow of each branch pipe of the dust removal pipe network system is calculated based on the physical quantities of the outlet pipe fitting model.

[0160] As an implementation of the embodiment of the present disclosure, before calculating the mass flow rate, heat flux density and pipe resistance of the inlet pipe model based on the fluid parameter information corresponding to the branch pipe model and the geometric boundary parameters of the inlet pipe model of the branch pipe model, the dust removal pipe network flow prediction method based on the one-dimensional simulation model may also include the following steps, namely, steps b1 to b4:

[0161] Step b1, obtaining the start time, end time and time interval for saving simulation data of the simulation calculation.

[0162] Step b2, starting from the start time, starts to execute the step of calculating the mass flow, heat flux density and pipe resistance of the inlet pipe model based on the fluid parameter information corresponding to the branch pipe model and the geometric boundary parameters of the inlet pipe model of the branch pipe model.

[0163] Step b3, after calculating the flow of the branch pipeline model, return to the step of calculating the mass flow, heat flux density and pipe resistance of the inlet pipe model based on the fluid parameter information corresponding to the branch pipeline model and the geometric boundary parameters of the inlet pipe model of the branch pipeline model. When the time consumed by the simulation calculation process reaches the end time, stop executing the simulation calculation process.

[0164] Step b4, saving the flow of the branch pipeline model at every time interval.

[0165] Specifically, after obtaining the one-dimensional simulation model of the pipe network system and setting the fluid parameter information, fan parameter information, valve parameter information, and geometric boundary parameters of each pipe model, the simulation calculation process of the one-dimensional simulation model can be started. Before performing the simulation calculation, the solution control parameters can be set, and the solution control parameters can include the start time of the simulation calculation, the end time of the simulation calculation, and the time interval for saving the simulation data.

[0166] For example, the start time of the simulation calculation can be set to 0s, the end time of the simulation calculation can be set to 200s, and the time interval for saving the simulation data can be set to 0.01s. After setting the solution control parameters, the simulation calculation process can be started, that is, the flow of each branch pipeline model of the dust removal pipe network system can be simulated. In practical applications, the time required for a single simulation calculation is very short. Therefore, multiple simulation calculations can be performed within 200 seconds to achieve the purpose of efficiently and accurately predicting the flow of each branch of the dust removal pipe network system, and the simulation calculation process can be stopped after the end time is reached. In addition, the simulation data can be saved every 0.01 seconds, so that the flow of each branch of the dust removal pipe network system can be directly obtained from the simulation results. In practical applications, the operating status information of each pipe fitting, such as wind speed, inlet and outlet pressure, and inlet and outlet temperature, can also be extracted from the simulation results.

[0167] In order to describe the solution clearly, a dust removal pipe network flow prediction method based on a one-dimensional simulation model provided by an embodiment of the present invention will be described below in conjunction with a specific example.

[0168] Still Figure 2 Take the design drawing of the dust removal pipe network system as an example. Figure 2As shown, it includes 7 branch pipes (called branch pipes in the above embodiment), the induced draft fan is used as the power source, and the fluid medium is air at normal temperature.

[0169] According to the drawings of the dust removal pipe network system, 25 straight pipes, 6 elbow pipes, 6 reducer pipes, 6 tee pipes, 7 valves, and 4 throttling pipes can be disassembled. A one-dimensional simulation model consistent with the design drawings is established on the one-dimensional simulation software, such as Fig. 9 As shown, this is a one-dimensional simulation model that is consistent with the design drawing. Fig. 9 As shown, signal element information is set for the fan model and valve model. At the same time, the geometric boundary parameters of each pipe model are set. According to the experimental operating conditions and test data, the signal elements of all valve models are set to fully open, that is, the valve opening is 100%; the fan pressure is -421.7Pa; the fluid medium is set to air, and the density is 1.18kg / m 3 , viscosity is 0.018Pa·s, and the initial temperature of the fluid is 293.15K. Set the work start time to 0s, the work end time to 200s, the simulation data save time interval to 0.01s, and the calculation residual to 10 -7 .

[0170] The flow rate of each branch pipe obtained by iterative calculation of the embodiment and the experimental test results are shown in Table 1. Table 1 is a comparison of the simulation results of the embodiment and the experimental test results (air volume, unit is m 3 / h) comparison shows that the relative deviation between the two is less than 10%, indicating that the dust removal pipe network flow prediction method based on the one-dimensional simulation model proposed in the present invention has high accuracy and high reliability.

[0171] Branch No. 1 2 3 4 5 6 7 Experimental value 1090 1433 1684 1999 2476 1906 1653 Simulation value 1179 1375 1735 1985 2330 1927 1681 Relative deviation 8.20％ -4.04％ 2.99％ -0.69％ -5.90％ 1.12％ 1.68％

[0172] In addition, this solution is easy to adjust the pipe fitting parameters and supports fast adjustment calculations for multiple schemes and multiple working conditions. For example, if you need to predict the flow of each branch pipe under other valve opening conditions, you only need to adjust the signal element; for another example, the curvature radius r of a certain curved pipe fitting c If there is a change, only the geometric boundary parameters of the corresponding pipe need to be adjusted.

[0173] It can be seen that the dust removal pipe network flow prediction method based on the one-dimensional simulation model proposed in the embodiment of the present invention, by constructing one-dimensional simulation models of various types of pipe fittings, can quickly and accurately predict the flow of each branch pipe of the dust removal pipe network system, that is, predict the amount of air extracted from each dust hood. At the same time, it is easy to adjust the parameters of the pipe fittings, and supports rapid adjustment and calculation of multiple schemes and multiple working conditions. It has the advantages of high design work efficiency and high prediction accuracy, thereby providing strong technical support for the design of the dust removal pipe network system.

[0174] In a second aspect, an embodiment of the present invention provides a dust removal pipe network flow prediction device based on a one-dimensional simulation model, such as Fig.13 As shown, the device comprises:

[0175] The information acquisition module 1310 is used to obtain the design drawings and parameter information of the dust removal pipe network system of the flow to be predicted; the design drawings include the layout diagram of each branch pipe of the dust removal pipe network system; the parameter information includes the fluid parameter information, fan parameter information and valve parameter information of the dust removal pipe network system;

[0176] The simulation model building module 1320 is used to split the layout diagrams of the branch pipes included in the design drawings to obtain split results; and to establish a one-dimensional simulation model of the dust removal pipe network system based on the split results; the branch pipe models in the one-dimensional simulation model correspond one-to-one to the branch pipes in the design drawings, and the branch pipe models with corresponding relationships are the same as the layout diagrams of the branch pipes;

[0177] A parameter setting module 1330 is used to set signal element information for a target pipe fitting model of the one-dimensional simulation model based on the fan parameter information and the valve parameter information, and to set geometric boundary parameters for the corresponding pipe fitting model based on the structural parameters of each pipe fitting in the design drawing; the target pipe fitting model includes a fan model and a valve model;

[0178] A simulation calculation module 1340 is used to perform simulation calculation on the flow of each branch pipeline model of the one-dimensional simulation model based on the fluid parameter information, the signal element information and the geometric boundary parameters of the pipe model, and determine the total residual value of the simulation calculation process;

[0179] The flow acquisition module 1350 is used to extract the flow of each branch pipeline model from the simulation results of the one-dimensional simulation model when the total residual value is less than the preset residual value, and based on the correspondence between the branch pipeline model and the branch pipeline, determine the flow of each branch pipeline model as the flow of the corresponding branch pipeline.

[0180] The simulation model building module is specifically used to: split the layout diagram of each branch pipeline included in the design drawing to obtain the pipe fittings included in each branch pipeline;

[0181] For each branch pipeline, a pipe fitting model having the same number and structure as the pipe fittings included in the branch pipeline is established in a one-dimensional simulation software;

[0182] For each branch pipeline, according to the layout diagram of the branch pipeline, the pipe fitting model corresponding to the branch pipeline is connected through a transmission line to obtain the branch pipeline model corresponding to the branch pipeline; the transmission line is used to transmit the physical quantity of the previous pipe fitting model adjacent to the next pipe fitting model according to the fluid flow direction; the physical quantity includes fluid flow, temperature, pressure and heat flux;

[0183] The obtained multiple branch pipeline models are combined into a one-dimensional simulation model of the dust removal pipe network system.

[0184] In one embodiment, the pipe fittings obtained by splitting the layout diagram of each branch pipeline include basic pipe fittings, and the basic pipe fittings include straight pipe fittings, curved pipe fittings, reducer pipe fittings, tee pipe fittings and valve pipe fittings; the simulation model building module is specifically used to: for a target branch pipeline, directly establish a basic pipe fitting model corresponding to each basic pipe fitting included in the target branch pipeline; the target branch pipeline is any branch pipeline among the various branch pipelines;

[0185] For the non-basic pipe fittings included in the target branch pipeline, multiple basic pipe fittings that can constitute the non-basic pipe fittings are determined, multiple basic pipe fitting models corresponding to the multiple basic pipe fittings are established, and the non-basic pipe fitting models corresponding to the non-basic pipe fittings are obtained by combining the multiple basic pipe fitting models.

[0186] In one implementation, the simulation calculation module is specifically used to:

[0187] For each branch pipeline model, based on the fluid parameter information corresponding to the branch pipeline model and the geometric boundary parameters of the inlet pipe model of the branch pipeline model, the mass flow rate, heat flux density and pipe resistance of the inlet pipe model are calculated;

[0188] The mass flow rate, heat flux density and pipe resistance of the inlet pipe fitting model are transmitted to the next pipe fitting model of the inlet pipe fitting model through a transmission line; wherein, when calculating the mass flow rate, heat flux density and pipe resistance of the pipe fitting model, if the pipe fitting model is a valve model, the calculation parameters also include signal element information of the valve model;

[0189] Calculate the mass flow rate, heat flux density and pipe resistance of the next pipe fitting model based on the fluid parameter information corresponding to the next pipe fitting model, the geometric boundary parameters of the pipe fitting model, and the mass flow rate, heat flux density and pipe resistance of the inlet pipe fitting model;

[0190] The mass flow rate, heat flux density and pipe resistance of the next pipe fitting model are transmitted to the next pipe fitting model adjacent thereto through the transmission line, and the mass flow rate, heat flux density and pipe resistance of the next pipe fitting model adjacent thereto are calculated until the mass flow rate, heat flux density and pipe resistance of the outlet pipe fitting model in the branch pipeline model are calculated;

[0191] The flow rate of the branch pipeline model is calculated based on the mass flow rate, heat flux density and pipe resistance of the outlet pipe model.

[0192] In one embodiment, the device further comprises:

[0193] A time data acquisition module, used for obtaining the start time, end time of simulation calculation and the time interval for saving simulation data before calculating the mass flow rate, heat flux density and pipe resistance of the inlet pipe model based on the fluid parameter information corresponding to the branch pipe model and the geometric boundary parameters of the inlet pipe model of the branch pipe model;

[0194] Starting from the starting time, the simulation calculation module is started to execute the step of calculating the mass flow rate, heat flux density and pipe resistance of the inlet pipe fitting model based on the fluid parameter information corresponding to the branch pipe model and the geometric boundary parameters of the inlet pipe fitting model of the branch pipe model;

[0195] After the flow rate of the branch pipeline model is calculated, the simulation calculation module is triggered to return to the step of calculating the mass flow rate, heat flux density and pipe resistance of the inlet pipe fitting model based on the fluid parameter information corresponding to the branch pipeline model and the geometric boundary parameters of the inlet pipe fitting model of the branch pipeline model; and when the time consumed by the simulation calculation process reaches the end time, the simulation calculation process is stopped;

[0196] The data saving module is used to save the flow of the branch pipeline model at each time interval.

[0197] In one embodiment, the device further comprises:

[0198] An information output module is used to stop the simulation calculation process and output simulation calculation error information when the total residual value is greater than or equal to a preset residual value; the simulation calculation error information includes the erroneous geometric boundary parameters of the target pipe fitting model; the target pipe fitting model is the pipe fitting model that causes the simulation calculation process error;

[0199] The information acquisition module is used to obtain the correct geometric boundary parameters of the target pipe model;

[0200] The simulation calculation module is specifically used to simulate and calculate the flow of each branch pipeline model of the one-dimensional simulation model based on the fluid parameter information, the signal element information and the correct geometric boundary parameters of the pipe model.

[0201] In a third aspect, an embodiment of the present invention provides an electronic device 1400, such as Fig.14 As shown, including:

[0202] at least one processor 1401;

[0203] a memory 1402 for storing the at least one processor executable instruction;

[0204] Wherein, the at least one processor is configured to execute the instructions to implement a dust removal pipe network flow prediction method based on a one-dimensional simulation model.

[0205] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium. When instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute a dust removal pipe network flow prediction method based on a one-dimensional simulation model.

[0206] An embodiment of the present invention further provides a computer program product, including a computer program, which, when executed by a processor, implements a dust removal pipe network flow prediction method based on a one-dimensional simulation model.

[0207] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A dust removal pipe network flow prediction method based on a one-dimensional simulation model, characterized in that: The method comprises: Obtaining the design drawings and parameter information of the dust removal pipe network system for which the flow is to be predicted; the design drawings include the layout diagram of each branch pipe of the dust removal pipe network system; the parameter information includes the fluid parameter information, fan parameter information and valve parameter information of the dust removal pipe network system; The layout diagrams of the branch pipes included in the design drawings are split to obtain split results; and a one-dimensional simulation model of the dust removal pipe network system is established based on the split results; the branch pipe models in the one-dimensional simulation model correspond one-to-one to the branch pipes in the design drawings, and the branch pipe models with corresponding relationships are the same as the layout diagrams of the branch pipes; Based on the fan parameter information and the valve parameter information, signal element information is set for the target pipe fitting model of the one-dimensional simulation model, and geometric boundary parameters are set for the corresponding pipe fitting model based on the structural parameters of each pipe fitting in the design drawing; the target pipe fitting model includes a fan model and a valve model; Based on the fluid parameter information, the signal element information and the geometric boundary parameters of the pipe model, simulate and calculate the flow of each branch pipeline model of the one-dimensional simulation model, and determine the total residual value of the simulation calculation process; When the total residual value is less than the preset residual value, the flow of each branch pipeline model is extracted from the simulation result of the one-dimensional simulation model, and based on the correspondence between the branch pipeline model and the branch pipeline, the flow of each branch pipeline model is determined as the flow of the corresponding branch pipeline.

2. The method according to claim 1, characterized in that The splitting of the layout diagram of each branch pipeline included in the design drawing to obtain a split result; and establishing a one-dimensional simulation model of the dust removal pipe network system based on the split result, including: Splitting the layout diagram of each branch pipeline included in the design drawing to obtain pipe fittings included in each branch pipeline; For each branch pipeline, a pipe fitting model having the same number and structure as the pipe fittings included in the branch pipeline is established in a one-dimensional simulation software; For each branch pipeline, according to the layout diagram of the branch pipeline, the pipe fitting model corresponding to the branch pipeline is connected through a transmission line to obtain the branch pipeline model corresponding to the branch pipeline; the transmission line is used to transmit the physical quantity of the previous pipe fitting model adjacent to the next pipe fitting model according to the fluid flow direction; the physical quantity includes fluid flow, temperature, pressure and heat flux; The obtained multiple branch pipeline models are combined into a one-dimensional simulation model of the dust removal pipe network system.

3. The method according to claim 2, characterized in that The pipe fittings obtained by splitting the layout diagram of each branch pipeline include basic pipe fittings, and the basic pipe fittings include straight pipe fittings, curved pipe fittings, reducer and reducer pipe fittings, tee pipe fittings and valve pipe fittings; For each branch pipeline, a pipe fitting model having the same number and structure as the pipe fittings included in the branch pipeline is established in the one-dimensional simulation software, including: For a target branch pipeline, directly establish a basic pipe fitting model corresponding to each basic pipe fitting included in the target branch pipeline; the target branch pipeline is any branch pipeline among the branch pipelines; For the non-basic pipe fittings included in the target branch pipeline, multiple basic pipe fittings that can constitute the non-basic pipe fittings are determined, multiple basic pipe fitting models corresponding to the multiple basic pipe fittings are established, and the non-basic pipe fitting models corresponding to the non-basic pipe fittings are obtained by combining the multiple basic pipe fitting models.

4. The method according to claim 1, characterized in that: The method of performing simulation calculation on the flow of each branch pipeline model of the one-dimensional simulation model based on the fluid parameter information, the signal element information and the geometric boundary parameters of the pipe model includes: For each branch pipeline model, based on the fluid parameter information corresponding to the branch pipeline model and the geometric boundary parameters of the inlet pipe model of the branch pipeline model, the mass flow rate, heat flux density and pipe resistance of the inlet pipe model are calculated; The mass flow rate, heat flux density and pipe resistance of the inlet pipe fitting model are transmitted to the next pipe fitting model of the inlet pipe fitting model through a transmission line; wherein, when calculating the mass flow rate, heat flux density and pipe resistance of the pipe fitting model, if the pipe fitting model is a valve model, the calculation parameters also include signal element information of the valve model; Calculate the mass flow rate, heat flux density and pipe resistance of the next pipe fitting model based on the fluid parameter information corresponding to the next pipe fitting model, the geometric boundary parameters of the pipe fitting model, and the mass flow rate, heat flux density and pipe resistance of the inlet pipe fitting model; The mass flow rate, heat flux density and pipe resistance of the next pipe fitting model are transmitted to the next pipe fitting model adjacent thereto through the transmission line, and the mass flow rate, heat flux density and pipe resistance of the next pipe fitting model adjacent thereto are calculated until the mass flow rate, heat flux density and pipe resistance of the outlet pipe fitting model in the branch pipeline model are calculated; The flow rate of the branch pipeline model is calculated based on the mass flow rate, heat flux density and pipe resistance of the outlet pipe model.

5. The method according to claim 4, characterized in that Before calculating the mass flow, heat flux and pipe resistance of the inlet pipe model based on the fluid parameter information corresponding to the branch pipe model and the geometric boundary parameters of the inlet pipe model of the branch pipe model, the method further includes: Get the start time, end time of the simulation calculation and the time interval for saving simulation data; Starting from the start time, the step of calculating the mass flow rate, heat flux density and pipe resistance of the inlet pipe model based on the fluid parameter information corresponding to the branch pipe model and the geometric boundary parameters of the inlet pipe model of the branch pipe model is started; After calculating the flow rate of the branch pipeline model, returning to the step of calculating the mass flow rate, heat flux density and pipe resistance of the inlet pipe fitting model based on the fluid parameter information corresponding to the branch pipeline model and the geometric boundary parameters of the inlet pipe fitting model of the branch pipeline model; and stopping the simulation calculation process when the time consumed by the simulation calculation process reaches the end time; The flow rate of the branch pipeline model is saved at each time interval.

6. The method according to any one of claims 1 to 5, characterized in that: When the total residual value is greater than or equal to a preset residual value, the method further includes: Stop the simulation calculation process and output simulation calculation error information; the simulation calculation error information includes the erroneous geometric boundary parameters of the target pipe fitting model; the target pipe fitting model is the pipe fitting model that causes the simulation calculation process error; Acquiring correct geometric boundary parameters of the target pipe fitting model; The method of performing simulation calculation on the flow of each branch pipeline model of the one-dimensional simulation model based on the fluid parameter information, the signal element information and the geometric boundary parameters of the pipe model includes: Based on the fluid parameter information, the signal element information and the correct geometric boundary parameters of the pipe model, the flow rates of the branch pipeline models of the one-dimensional simulation model are simulated and calculated.

7. A dust removal pipe network flow prediction device based on a one-dimensional simulation model, characterized in that: The device comprises: An information acquisition module, used to acquire design drawings and parameter information of the dust removal pipe network system for which the flow is to be predicted; the design drawings include the layout diagram of each branch pipe of the dust removal pipe network system; the parameter information includes fluid parameter information, fan parameter information and valve parameter information of the dust removal pipe network system; A simulation model building module, used to split the layout diagrams of each branch pipeline included in the design drawing to obtain a split result; and to establish a one-dimensional simulation model of the dust removal pipe network system based on the split result; the branch pipeline models in the one-dimensional simulation model correspond one-to-one to the branch pipelines in the design drawing, and the branch pipeline models with corresponding relationships are the same as the layout diagrams of the branch pipelines; A parameter setting module, configured to set signal element information for a target pipe fitting model of the one-dimensional simulation model based on the fan parameter information and the valve parameter information, and to set geometric boundary parameters for the corresponding pipe fitting model based on the structural parameters of each pipe fitting in the design drawing; the target pipe fitting model includes a fan model and a valve model; A simulation calculation module, used to perform simulation calculation on the flow of each branch pipeline model of the one-dimensional simulation model based on the fluid parameter information, the signal element information and the geometric boundary parameters of the pipe model, and determine the total residual value of the simulation calculation process; The flow acquisition module is used to extract the flow of each branch pipeline model from the simulation result of the one-dimensional simulation model when the total residual value is less than the preset residual value, and determine the flow of each branch pipeline model as the flow of the branch pipeline corresponding thereto based on the corresponding relationship between the branch pipeline model and the branch pipeline.

8. An electronic device, characterized in that: include: at least one processor; a memory for storing the at least one processor-executable instruction; The at least one processor is configured to execute the instructions to implement the method according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that: When the instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the method according to any one of claims 1 to 6.

10. A computer program product, characterized in that The method comprises a computer program, which implements the method according to any one of claims 1 to 6 when being executed by a processor.

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