Multi-channel cyclone separator gas phase velocity fitting method and device and electronic equipment

Abstract

The invention discloses a multi-channel cyclone separator gas phase velocity fitting method and device and a storage medium, and the method comprises the steps: building a geometric model of a multi-channel cyclone separator, carrying out the numerical simulation of the gas phase velocity at a channel inlet of the geometric model, constructing an outer contour function, carrying out the outer contour function fitting, and obtaining an outer contour fitting curve; and constructing an environmental influence factor function and performing environmental influence factor function fitting to obtain an environmental influence factor fitting curve, and constructing a total gas velocity function based on the outer contour function and the environmental influence factor function and performing total gas velocity function fitting to obtain a total gas velocity fitting curve. According to the method, the influence of a separator baffle on gas flow velocity fitting is considered, and an outer contour fitting function and an environmental influence factor fitting function are adopted to carry out quadratic function fitting and superposition on the gas flow velocity, so that a total gas velocity fitting curve is obtained; the fitting result obtained by adopting the high-precision gas phase velocity fitting function provided by the invention is more consistent with the reality.

Description

Technical Field

[0001] This invention belongs to the field of gas-liquid separation technology, and particularly relates to a method, device and electronic equipment for gas phase velocity fitting of a multi-channel cyclone separator. Background Technology

[0002] Reciprocating compressors are key equipment in the energy sector. They use the reciprocating motion of a piston within a cylinder to periodically change the cylinder volume, thereby pressurizing and transporting gas. During operation, if liquid-laden gas enters the compressor, the liquid will occupy the compressor's clearance space, resulting in liquid slugging. To meet the liquid content requirements of the inlet gas in reciprocating compressors, a high-efficiency gas-liquid separation device is needed. Multi-channel cyclone separators are an ideal choice due to their simple structure, large gas throughput, and high separation efficiency. Based on the tangential cyclone separator structure, the gas flow enters the separator through a tangential inlet and then enters a multi-channel space composed of arc-shaped baffles. Separation efficiency is a key performance parameter of multi-channel cyclone separators. The magnitude and distribution of gas phase velocity directly affect the droplet trajectory and separation effect. The construction of the separation efficiency model and accurate prediction of efficiency depend on the velocity function within the multi-channel cyclone separator. Therefore, an accurate description of the velocity function is crucial for predicting separation efficiency. Current research on multi-channel cyclone separators mainly focuses on internal structural improvements and droplet behavior studies. Velocity studies often employ traditional methods, such as fitting the inlet gas velocity of a multi-stage demister using quadratic polynomials and simulating the velocity field within the separator. Another example is the study of the critical particle size in multi-channel cyclone separators, which assumes a uniform gas velocity distribution and calculates the critical particle size and designs the number of channels based on this assumption. While both methods can fit the gas velocity within the multi-channel cyclone separator to some extent, the presence of baffles makes it difficult to reflect the flow field near the baffles and the internal flow field inhomogeneity, thus failing to accurately reflect the internal gas velocity. Furthermore, in multi-channel cyclone separators, the gas flow primarily exhibits a spiral upward pattern, resulting in multi-layered gas swirls. During this process, gas diffusion between layers and friction between the gas and the wall cause the gas to attenuate during the movement of the multi-channel cyclone separator. This process was not considered in the establishment of the velocity field, which in turn affects the accuracy of velocity prediction. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a gas phase velocity fitting method, apparatus, and storage medium for a multi-channel cyclone separator. This solves the problem that traditional gas velocity fitting methods for multi-channel cyclone separators are insufficient to reflect the flow field conditions near the baffles and the internal flow field inhomogeneity, thus failing to accurately reflect the gas velocity inside the multi-channel cyclone separator and consequently affecting the accuracy of velocity prediction.

[0004] A method for fitting the gas phase velocity of a multi-channel cyclone separator includes:

[0005] Establish a geometric model of a multi-channel cyclone separator;

[0006] Numerical simulation of the gas phase velocity at the channel inlet in the geometric model was performed to obtain the gas velocity distribution map;

[0007] Based on the air velocity distribution map, an outer contour function is constructed and fitted to the outer contour function to obtain the outer contour fitting curve;

[0008] Based on the air velocity distribution map, an environmental impact factor function is constructed and fitted to the environmental impact factor function to obtain the environmental impact factor fitting curve.

[0009] The total gas velocity function is constructed based on the outer contour function and the environmental influencing factor function, and the total gas velocity function is fitted to obtain the total gas velocity fitting curve.

[0010] According to a specific embodiment of the present invention, establishing the geometric model of a multi-channel cyclone separator includes:

[0011] A geometric model of the multi-channel cyclone separator is established based on its structural characteristics and dimensions.

[0012] According to a specific embodiment of the present invention, a numerical simulation of the gas phase velocity at the channel inlet in the geometric model is performed to obtain a gas velocity distribution map, including:

[0013] The gas phase velocity at the inlet section of the separator channel was numerically simulated using turbulence model, discrete phase model, Euler wall liquid film model and related parameters, and multiple gas velocity distribution data were obtained.

[0014] A gas velocity distribution map is generated based on multiple gas velocity distribution data.

[0015] According to a specific embodiment of the present invention, the turbulence model selected is the RNG k-ε model.

[0016] The transport equation for the RNG k-ε model is:

[0017]

[0018] Where ρ is the fluid density, t is time, k is turbulent kinetic energy, and u i uj Let x be the velocity components in the i and j directions. i x j The positions in the i and j directions are respectively, α k and α ε These are the reciprocals of the effective Prandtl numbers for k and ε, respectively, and μ eff For effective speed, G k This represents the turbulent kinetic energy generation term due to the average velocity gradient. and C 2ε It is a constant.

[0019] According to a specific embodiment of the present invention, the discrete phase model is selected as the DPM model.

[0020] The particle motion equations in the DPM model are:

[0021]

[0022] In the formula, u is the air velocity, u p Let F be the velocity of the droplet. D F is the drag force on the droplet. G For the gravity acting on the droplet, F x The relevant forces acting on the droplet;

[0023] The droplet is subjected to drag force F D Represented as:

[0024]

[0025] In the formula, ρ is the gas density, and C D Where A is the drag coefficient and A is the droplet's frontal area.

[0026] Drag coefficient C D Represented as:

[0027]

[0028] In the formula, Re p is the Reynolds number of the droplet.

[0029] According to a specific embodiment of the present invention, the Euler wall liquid film model uses the Euler description method of continuous distribution of fluid in space to calculate the behavior of droplets or liquid films on the wall surface.

[0030] According to a specific embodiment of the present invention, an outer contour function is constructed based on the gas velocity distribution map and the outer contour function is fitted to obtain an outer contour fitting curve, including:

[0031] Based on the characteristics of the gas velocity distribution data in the gas velocity distribution map, select a single quadratic function or multiple quadratic functions to construct the outer contour function;

[0032] The outer contour function is fitted to obtain the outer contour fitting curve.

[0033] According to a specific embodiment of the present invention, selecting a single quadratic function or multiple quadratic functions based on the gas velocity distribution data characteristics in the gas velocity distribution map to construct the outer contour function further includes:

[0034] Determine whether the gas velocity distribution data in the gas velocity distribution map meets the preset error range. If it does, select a single quadratic function to construct the outer contour fitting function v. t Otherwise, select multiple quadratic functions to construct the outer contour fitting function y. o ;

[0035] Outer contour fitting function v t for:

[0036] v t =(a—bx—cx) 2 )υ in

[0037]

[0038] Among them, v t Let v be the gas phase velocity at each location. in Let x be the gas phase velocity at the tangential inlet, x be the axial position, D be the cylinder diameter, and d be the gas phase velocity. c Let n be the core diameter, n be the number of channels, and a, b, and c be the correlation coefficients between the cylinder diameter, core diameter, and number of channels, respectively.

[0039] Outer contour fitting function y o for:

[0040] y o =max{y1,y2}

[0041] y1=(a1-b1x-c1x 2 )v in

[0042] y2=(a2-b2x-c2x 2 )v in

[0043] Among them, y i Let be the gas phase velocity at each location, and let 'a' be the coefficient. i b i c i These represent the cylinder diameter D and the core cylinder diameter d, respectively. c The correlation coefficient between the number of channels n, i = 1, 2.

[0044] According to a specific embodiment of the present invention, an environmental impact factor function is constructed based on the air velocity distribution map, and the environmental impact factor function is fitted to obtain the environmental impact factor fitting curve, including:

[0045] Construct an environmental influencing factor function based on the characteristics of air velocity distribution data in the air velocity distribution map;

[0046] Based on the environmental impact factor function, the environmental impact factor function is fitted to obtain the environmental impact factor fitting curve;

[0047] The environmental impact factor function is expressed as follows:

[0048]

[0049] In the formula, y p For the fitting function of environmental impact factors, l i To fit a quadratic function of the baffle effect, n is the number of channels.

[0050] According to a specific embodiment of the present invention, a total gas velocity function is constructed based on the outer contour function and the environmental influencing factor function, and the total gas velocity function is fitted to obtain a total gas velocity fitting curve, including:

[0051] The outer contour function is superimposed with the environmental influencing factor function to obtain the total air velocity function, and the total air velocity function is fitted based on the total air velocity function to obtain the total air velocity fitting curve.

[0052] The total air velocity fitting function is expressed as:

[0053] y = y o +y p

[0054] In the formula, y represents the total air velocity fitting function, y o Represents the outer contour function, y p This represents a function representing environmental impact factors.

[0055] A multi-channel cyclone separator gas phase velocity fitting device, comprising:

[0056] Modeling unit, used to build the geometric model of a multi-channel cyclone separator;

[0057] The numerical simulation unit is used to numerically simulate the gas phase velocity at the channel inlet in the geometric model and obtain the gas velocity distribution map.

[0058] The outer contour function fitting unit is used to construct an outer contour function based on the air velocity distribution map and perform outer contour function fitting to obtain the outer contour fitting curve.

[0059] The environmental impact factor function fitting unit is used to construct environmental impact factor functions based on the air velocity distribution map and perform environmental impact factor function fitting to obtain environmental impact factor fitting curves.

[0060] The total gas velocity function fitting unit is used to construct the total gas velocity function based on the outer contour function and the environmental influence factor function, and to fit the total gas velocity function to obtain the total gas velocity fitting curve.

[0061] An electronic device includes at least one processor, and at least one memory and bus connected to the processor; wherein the processor and memory communicate with each other through the bus; the processor is used to call program instructions in the memory to execute the above-described method for fitting the gas phase velocity of a multi-channel cyclone separator.

[0062] A computer storage medium for storing a computer program, wherein the computer program, when running, controls the device where the storage medium is located to execute the aforementioned method for fitting the gas phase velocity of a multi-channel cyclone separator.

[0063] Compared with the prior art, the present invention has the following advantages:

[0064] This invention provides a gas phase velocity fitting method for a multi-channel cyclone separator. Considering the influence of the baffles inside the separator on the gas velocity fitting, after numerically simulating the gas phase velocity, a quadratic function fitting is performed using an outer contour fitting function and an environmental influence factor fitting function, respectively. The fitting results of the two are then superimposed to obtain the total gas velocity fitting curve. Compared with traditional fitting methods, the fitting results obtained using the high-precision gas phase velocity fitting function provided by this invention are more consistent with reality. Attached Figure Description

[0065] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0066] Figure 1 This is a flowchart of a gas phase velocity fitting method for a multi-channel cyclone separator according to an embodiment of the present invention.

[0067] Figure 2 This is a flowchart of a method for numerically simulating the gas phase velocity at the inlet of a channel in a geometric model, according to an embodiment of the present invention.

[0068] Figure 3 This is a flowchart of a method for constructing an outer contour function and fitting the outer contour function according to an embodiment of the present invention.

[0069] Figure 4 This is a flowchart of a method for constructing and fitting environmental impact factor functions according to an embodiment of the present invention.

[0070] Figure 5 This is a gas phase velocity distribution diagram at the inlet of the baffle of a multi-channel cyclone separator provided according to an embodiment of the present invention.

[0071] Figure 6 This is a quadratic function fitting graph of the gas phase velocity at the baffle inlet using a conventional method, according to an embodiment of the present invention.

[0072] Figure 7 This is a fitting graph of the outer contour function provided according to an embodiment of the present invention.

[0073] Figure 8 This is a fitting graph of environmental impact factor functions provided according to an embodiment of the present invention.

[0074] Figure 9 This is a fitting graph of the total gas phase velocity function provided according to an embodiment of the present invention.

[0075] Figure 10 This is a structural block diagram of a multi-channel cyclone separator gas phase velocity fitting device according to an embodiment of the present invention.

[0076] Figure 11 This is a schematic diagram of an electronic device structure according to an embodiment of the present invention. Detailed Implementation

[0077] To enable those skilled in the art to more clearly understand the concepts and ideas of the present invention, the present invention is described in detail below with reference to specific embodiments. It should be understood that the embodiments given herein are only a part of all possible embodiments of the present invention. Those skilled in the art, after reading this specification, are capable of making improvements, modifications, or substitutions to parts or the entirety of the following embodiments, and such improvements, modifications, or substitutions are also included within the scope of protection claimed by the present invention.

[0078] In this document, the terms "first," "second," and other similar words are not intended to imply any order, quantity, or importance, but are merely used to distinguish different elements. The terms "one," "a," and other similar words are not intended to indicate the existence of only one thing, but rather that the description pertains to only one of the things, which may have one or more. The terms "contains," "includes," and other similar words are intended to indicate a logical relationship, not a spatial one. For example, "A includes B" means that logically B belongs to A, not that spatially B is located inside A. Furthermore, the meanings of the terms "contains," "includes," and other similar words should be considered open-ended, not closed. For example, "A includes B" means that B belongs to A, but B does not necessarily constitute all of A; A may also include other elements such as C, D, and E.

[0079] In this document, the terms "embodiment," "this embodiment," "an embodiment," and "one embodiment" do not imply that the description applies only to one specific embodiment, but rather that such description may also be applicable to one or more other embodiments. Those skilled in the art will understand that any description made herein with respect to one embodiment can be substituted, combined, or otherwise combined with the descriptions in one or more other embodiments. New embodiments resulting from such substitutions, combinations, or other combinations are readily conceived by those skilled in the art and fall within the scope of protection of this invention.

[0080] Example 1

[0081] Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of the invention. Figures 1-4 This invention provides a method for fitting the gas phase velocity of a multi-channel cyclone separator, comprising:

[0082] S1: Establish the geometric model of the multi-channel cyclone separator.

[0083] S2: Perform numerical simulation of the gas phase velocity at the channel inlet in the geometric model to obtain the gas velocity distribution map.

[0084] S3: Construct an outer contour function based on the air velocity distribution map and fit the outer contour function to obtain the outer contour fitting curve.

[0085] S4: Construct an environmental impact factor function based on the air velocity distribution map and fit the environmental impact factor function to obtain the environmental impact factor fitting curve.

[0086] S5: Construct the total gas velocity function based on the outer contour function and the environmental influencing factor function, and fit the total gas velocity function to obtain the total gas velocity fitting curve.

[0087] Specifically, step S1, establishing the geometric model of the multi-channel cyclone separator, includes:

[0088] A geometric model of the multi-channel cyclone separator is established based on its structural characteristics and dimensions.

[0089] In a specific embodiment of the present invention, the multi-channel cyclone separator mainly consists of a cylindrical body, a core cylinder, a baffle, a baffle inlet, a liquid collecting cone, an upper cone, and an exhaust pipe. The design parameters of the multi-channel cyclone separator are determined according to the structural characteristics of the separator and relevant design specifications, including the size of the separator, the number of channels, etc. Then, a three-dimensional geometric model of the multi-channel cyclone separator is created using computer-aided design software. This model includes details and parameter settings of each component of the separator.

[0090] Specifically, step S2 performs a numerical simulation of the gas phase velocity at the channel inlet in the geometric model, obtaining a gas velocity distribution map including:

[0091] S21: The gas phase velocity at the inlet section of the separator channel was numerically simulated using turbulence model, discrete phase model, Euler wall liquid film model and related parameters, and multiple gas velocity distribution data were obtained.

[0092] S22: Generate a gas velocity distribution map based on multiple gas velocity distribution data.

[0093] In a specific embodiment of the present invention, a suitable mathematical model is first selected to model the gas inside the multi-channel cyclone separator, used to numerically simulate the gas phase velocity inside the separator, obtaining multiple gas velocity distribution data inside the separator. Then, these multiple gas velocity distribution data are merged to generate a gas velocity distribution map. Taking a four-channel cyclone separator as an example, the gas velocity at its channel inlet is 20 m / s. After simulating the flow field at the baffle inlet, its inlet gas velocity distribution map can be obtained, such as... Figure 5 As shown, the horizontal axis represents the location coordinates of the gas velocity distribution data, and the vertical axis represents the gas phase velocity. By performing numerical simulations on each gas velocity distribution data, a gas phase velocity curve is finally generated to reflect the gas velocity distribution.

[0094] In the mathematical modeling process, this embodiment of the invention selects a turbulence model, a discrete phase model, and an Eulerian wall liquid film model to model the gas within the separator. The turbulence model is a mathematical model related to vortex structures and flow characteristics in fluid dynamics. The discrete phase model is used to simulate and analyze fluid dynamics models containing discrete particles or droplets. The discrete phase model can track the trajectories, velocities, temperatures, and mass transfer characteristics of these discrete elements in the continuous phase, and can be used to handle multiphase flow problems such as gas-liquid and liquid-solid flows. The Eulerian wall liquid film model is a computational fluid dynamics model used to simulate the flow and distribution of liquid films on solid walls, suitable for handling phenomena such as the formation, flow, evaporation, and condensation of liquid films.

[0095] (1) Turbulence Model

[0096] The gas flow within a multi-channel cyclone separator conforms to the continuity and momentum conservation equations in fluid mechanics. The expressions for the mass and momentum conservation equations are as follows:

[0097] mass conservation equation:

[0098]

[0099] Momentum conservation equation:

[0100]

[0101] Where ρ is the fluid density, t is time, and u i u j Let x be the velocity components in the i and j directions. i x j Let i and j be the positions in the i and j directions, respectively, p be the fluid pressure, and μ be the fluid viscosity.

[0102] The RNG k-ε model is derived by incorporating renormalization group theory into the standard k-ε model. In this embodiment of the invention, the RNG k-ε model is selected as the turbulence model for the gas phase flow field.

[0103] The transport equation for the RNG k-ε model is:

[0104]

[0105] Where ρ is the fluid density, t is time, k is turbulent kinetic energy, and u i u j Let x be the velocity components in the i and j directions. i x j The positions in the i and j directions are respectively, α k and α ε These are the reciprocals of the effective Prandtl numbers for k and ε, respectively, and μ effFor effective speed, G k This represents the turbulent kinetic energy generation term due to the average velocity gradient. and C 2ε It is a constant.

[0106] (2) Discrete Phase Model

[0107] In this embodiment of the invention, the Eulerian-Lagrange-based DPM (Discrete Phase Model 1) model is selected as the discrete phase model.

[0108] The particle motion equations in the DPM model are:

[0109]

[0110] In the formula, u is the air velocity, u p Let F be the velocity of the droplet. D F is the drag force on the droplet. G For the gravity acting on the droplet, F x The forces acting on the droplets are actually much smaller than the density of the droplets inside the separator. The droplets are mainly subjected to drag force during their movement, and other forces can be ignored.

[0111] The droplet is subjected to drag force F D Represented as:

[0112]

[0113] In the formula, ρ is the fluid density, and C D Where A is the drag coefficient and A is the droplet's frontal area.

[0114] Drag coefficient C D Represented as:

[0115]

[0116] In the formula, Re p is the Reynolds number of the droplet.

[0117] (3) Euler wall liquid film model

[0118] The Euler wall liquid film model uses the Euler description of continuous fluid distribution in space to calculate the behavior of droplets or liquid films on a wall surface. In the Euler wall liquid film model, the liquid film follows the continuity equation and the momentum conservation equation.

[0119] The equation for the conservation of liquid film mass is:

[0120]

[0121] In the formula, ρ p Let h be the liquid density and h be the liquid film thickness. For surface gradient operators, The average velocity of the liquid film. The droplets collected per unit wall surface are caused by phenomena such as liquid film rupture, splashing, and phase change.

[0122] The momentum conservation equation is:

[0123]

[0124] In the formula, P is the differential advection term calculated based on the secondary liquid film velocity profile. L The pressure between the gas phase and the liquid film. This represents the component of gravity parallel to the membrane flow direction. Let μ be the viscous shear force at the boundary between the airflow and the liquid film, and μ1 be the viscous force of the liquid film itself. For the collection and breakup of droplets during the separation process, This is the force generated by the contact between the liquid film and the solid wall.

[0125] In a specific embodiment of the present invention, the Euler wall liquid film model is coupled with the DPM model to characterize the thickness and distribution of the liquid film on the separator wall.

[0126] Specifically, step S3 involves constructing an outer contour function based on the gas velocity distribution map and fitting the outer contour function to obtain the outer contour fitting curve, including:

[0127] S31: Based on the characteristics of the gas velocity distribution data in the gas velocity distribution map, select a single quadratic function or multiple quadratic functions to construct the outer contour function, specifically including:

[0128] Determine whether the gas velocity distribution data in the gas velocity distribution map meets the preset error range. If it does, select a single quadratic function to construct the outer contour fitting function v. t Otherwise, select multiple quadratic functions to construct the outer contour fitting function y. o ,in,

[0129] The outer contour fitting function v is constructed using a single quadratic function. t Represented as:

[0130] v t =(a-bx-cx) 2 )υ in (10)

[0131]

[0132] Among them, v t Let v be the gas phase velocity at each location. in Let x be the gas phase velocity at the tangential inlet, x be the axial position, D be the cylinder diameter, and d be the gas phase velocity. cLet n be the core diameter, n be the number of channels, and a, b, and c be the correlation coefficients between the cylinder diameter, core diameter, and number of channels, respectively.

[0133] The outer contour fitting function y is constructed using multiple quadratic functions. o Represented as:

[0134] y o =max{y1,y2} (12)

[0135] y1=(a1-b1x-c1x 2 )v in (13)

[0136] y2=(a2-b2x-c2x 2 )v in (14)

[0137] Among them, y o To find the maximum value of the two segments of the function, y i Let be the gas phase velocity at each location, and let 'a' be the coefficient. i b i c i These represent the cylinder diameter D and the core cylinder diameter d, respectively. c The correlation coefficient between the number of channels n, i = 1, 2.

[0138] S32: Fit the outer contour function based on the outer contour function to obtain the outer contour fitting curve.

[0139] This invention, through the construction of an outer contour function and the fitting of the outer contour function, can accurately capture the contour shape characteristics of the gas phase velocity in the gas velocity distribution map without considering the influence of the baffle. The fitted outer contour curve is used to characterize the overall trend of the gas phase velocity without the influence of the baffle.

[0140] Specifically, step S4 involves constructing an environmental impact factor function based on the air velocity distribution map and fitting the environmental impact factor function to obtain the environmental impact factor fitting curve, including:

[0141] S41: Construct an environmental influencing factor function based on the characteristics of air velocity distribution data in the air velocity distribution map.

[0142] S42: Fit the environmental impact factor function based on the environmental impact factor function to obtain the environmental impact factor fitting curve.

[0143] In this embodiment of the invention, the environmental impact factor function fitting method adopts the form of an impulse function. This function can solve the problem of the influence of the baffle on the gas phase velocity at both the near and far ends. The environmental impact factor function is expressed as follows:

[0144]

[0145] In the formula, y p For the fitting function of environmental impact factors, l i To fit a quadratic function of the baffle effect, n is the number of channels.

[0146] If the conventional method is used Figure 5 By performing a second-order fitting on the gas velocity distribution map, we can obtain... Figure 6 The quadratic function fitting graph shown is from... Figure 6 It can be seen that the baffles inside the separator have a significant impact on the fitting of the gas velocity curve. Without considering the influence of the baffles, the fitted curve cannot accurately reflect the gas velocity inside the multi-channel cyclone separator under this condition.

[0147] This invention, through the construction of an environmental impact factor function and its fitting, can accurately capture the contour shape characteristics of the gas phase velocity in the gas velocity distribution map under the influence of the baffle. The fitted curve of the environmental impact factor is used to characterize the overall trend of the gas phase velocity affected by the baffle.

[0148] Specifically, step S5 constructs the total gas velocity function based on the outer contour function and the environmental influencing factor function, and then fits the total gas velocity function to obtain the total gas velocity fitting curve, including:

[0149] The outer contour function is superimposed with the environmental influencing factor function to obtain the total air velocity function, and the total air velocity function is fitted based on the total air velocity function to obtain the total air velocity fitting curve.

[0150] The total air velocity fitting function is expressed as:

[0151] y = y o +y p (16)

[0152] In the formula, y represents the total air velocity fitting function, y o Represents the outer contour function, y p This represents a function representing environmental impact factors.

[0153] In this embodiment of the invention, a total gas velocity function is constructed by combining a contour fitting function and an environmental influencing factor function. The total gas velocity function is then fitted to obtain a complete gas phase velocity fitting curve, which is used to characterize the overall trend of the total gas phase velocity affected by the baffle.

[0154] Example 2

[0155] Combination Figures 5-9This invention provides a specific example of a gas phase velocity fitting method for a multi-channel cyclone separator. Taking a four-channel cyclone separator as an example, the separator has a tangential inlet, three baffles, and is made of acrylic. A gas-liquid two-phase flow is introduced, with a gas phase velocity of 20 m / s. The data acquisition surface is the cross-section at the channel inlet. After collecting the gas phase velocity at the channel inlet, numerical simulation is performed on the collected gas phase velocity to obtain the following results: Figure 5 The gas velocity distribution diagram shown is from... Figure 5 As can be seen, the gas phase velocity reaches an inflection point at an axial position of 0.2m, and the data after the inflection point is relatively flat. Therefore, in this embodiment of the invention, two functions are selected for its outer contour fitting, that is, the outer contour fitting function formulas (12)-(14) are selected for outer contour fitting. The fitting results are as follows: Figure 7 As shown, environmental impact factor function fitting is performed simultaneously. In this embodiment of the invention, the four-channel cyclone separator has three baffles. Therefore, this embodiment of the invention uses the environmental impact factor function formula (15) to fit the curves at the three baffles. i This is to simulate the effect of the baffle. The fitting results of the environmental impact factor function are as follows: Figure 8 As shown, from Figure 8 It can be seen that considering the influence of the baffle inside the separator, which causes a decrease in velocity near the baffle, after completing the fitting of the outer contour and the fitting of environmental factors, the total gas velocity fitting function is superimposed on the outer contour fitting function and the fitting function of environmental factors to obtain the fitting of the total gas velocity function. The fitting result is as follows. Figure 9 As shown, from Figure 9 It can be seen that the fitting method proposed in this application matches the actual value.

[0156] Example 3

[0157] Based on the above method, embodiments of the present invention also provide a gas phase velocity fitting device for a multi-channel cyclone separator corresponding to the above method. Figure 10 A block diagram of a multi-channel cyclone separator gas phase velocity fitting device according to an embodiment of the present invention is shown, as follows: Figure 10 As shown in the figure, an embodiment of the present invention provides a multi-channel cyclone separator gas phase velocity fitting device, comprising:

[0158] Modeling Unit 1 is used to establish the geometric model of the multi-channel cyclone separator.

[0159] Numerical simulation unit 2 is used to perform numerical simulation of the gas phase velocity at the channel inlet in the geometric model to obtain the gas velocity distribution map.

[0160] The outer contour function fitting unit 3 is used to construct the outer contour function based on the air velocity distribution map and perform outer contour function fitting to obtain the outer contour fitting curve.

[0161] Environmental impact factor function fitting unit 4 is used to construct environmental impact factor functions based on the air velocity distribution map and to fit the environmental impact factor functions to obtain the environmental impact factor fitting curve.

[0162] The total gas velocity function fitting unit 5 is used to construct the total gas velocity function based on the outer contour function and the environmental influence factor function, and to fit the total gas velocity function to obtain the total gas velocity fitting curve.

[0163] It should be noted that the electrical connections between the various units mentioned above do not necessarily represent the connections between lines. Indirect connections are acceptable as long as they achieve the purpose of this invention and can be applied to the embodiments disclosed herein.

[0164] Example 4

[0165] Based on the same inventive concept disclosed above, the present invention also provides an electronic device. For example... Figure 11 As shown, the electronic device of this embodiment includes at least one processor, and at least one memory and bus connected to the processor, wherein the processor and memory communicate with each other through the bus; the processor is used to call program instructions in the memory to execute the above-described method for fitting the gas phase velocity of a multi-channel cyclone separator.

[0166] Example 5

[0167] Based on the same inventive concept, the present invention also provides a computer storage medium for storing a computer program, wherein the computer program, when running, controls the device where the storage medium is located to execute the above-described method for fitting the gas phase velocity of a multi-channel cyclone separator.

[0168] In summary, the gas phase velocity fitting method, apparatus, and storage medium for a multi-channel cyclone separator described in this invention have the following advantages:

[0169] This invention provides a gas phase velocity fitting method for a multi-channel cyclone separator. Considering the influence of the baffles inside the separator on the gas velocity fitting, after numerically simulating the gas phase velocity, a quadratic function fitting is performed using an outer contour fitting function and an environmental influence factor fitting function, respectively. The fitting results of the two are then superimposed to obtain the total gas velocity fitting curve. Compared with traditional fitting methods, the fitting results obtained using the high-precision gas phase velocity fitting function provided by this invention are more consistent with reality.

[0170] The concepts, principles, and ideas of the present invention have been described in detail above with reference to specific embodiments (including examples and instances). Those skilled in the art should understand that the embodiments of the present invention are not limited to those given above. After reading this application, those skilled in the art can make any possible improvements, substitutions, and equivalents to the steps, methods, systems, and components in the above embodiments. These improvements, substitutions, and equivalents should be considered to fall within the scope of the present invention, and the scope of protection of the present invention is limited to the claims.

Claims

1. A method for fitting the gas phase velocity of a multi-channel cyclone separator, characterized in that, include: Establish a geometric model of a multi-channel cyclone separator; Numerical simulation was performed on the gas phase velocity at the channel inlet in the geometric model to obtain a gas velocity distribution map; Based on the gas velocity distribution map, an outer contour function is constructed and fitted to obtain the outer contour fitting curve. Based on the gas velocity distribution map, an environmental impact factor function is constructed and fitted to obtain the environmental impact factor fitting curve. Based on the outer contour function and the environmental influencing factor function, a total air velocity function is constructed and fitted to obtain a total air velocity fitting curve.

2. The gas phase velocity fitting method for a multi-channel cyclone separator according to claim 1, characterized in that, The geometric model for establishing the multi-channel cyclone separator includes: A geometric model of the multi-channel cyclone separator is established based on its structural characteristics and dimensions.

3. The gas phase velocity fitting method for a multi-channel cyclone separator according to claim 1, characterized in that, The numerical simulation of the gas phase velocity at the channel inlet in the geometric model to obtain the gas velocity distribution map includes: The gas phase velocity at the inlet section of the separator channel was numerically simulated using turbulence model, discrete phase model, Euler wall liquid film model and related parameters, and multiple gas velocity distribution data were obtained. A gas velocity distribution map is generated based on multiple gas velocity distribution data.

4. The gas phase velocity fitting method for a multi-channel cyclone separator according to claim 3, characterized in that, The turbulence model selected is the RNG k-ε model. The transport equation of the RNG k-ε model is: Where ρ is the fluid density, t is time, k is turbulent kinetic energy, and u i u j These are the velocity components in the i and j directions, respectively, x i x j The positions in the i and j directions are respectively, α k and α ε These are the reciprocals of the effective Prandtl numbers of K and ε, respectively, and μ eff For effective speed, G k This represents the turbulent kinetic energy generation term due to the average velocity gradient. and C 2ε It is a constant.

5. The gas phase velocity fitting method for a multi-channel cyclone separator according to claim 3, characterized in that, The discrete phase model selected is the DPM model. The particle motion equations of the DPM model are as follows: In the formula, u is the air velocity, u p Let F be the velocity of the droplet. D F is the drag force on the droplet. G For the gravity acting on the droplet, F x The relevant forces acting on the droplet; The droplet is subjected to drag force F D Represented as: In the formula, ρ is the fluid density, and C D Where A is the drag coefficient and A is the droplet's frontal area. Drag coefficient C D Represented as: In the formula, Re p is the Reynolds number of the droplet.

6. The gas phase velocity fitting method for a multi-channel cyclone separator according to claim 3, characterized in that, The Euler wall liquid film model uses the Euler description of continuous fluid distribution in space to calculate the behavior of droplets or liquid films on the wall surface.

7. The gas phase velocity fitting method for a multi-channel cyclone separator according to claim 1, characterized in that, The process of constructing an outer contour function based on the gas velocity distribution map and fitting the outer contour function to obtain the outer contour fitting curve includes: Based on the characteristics of the gas velocity distribution data in the gas velocity distribution map, select a single quadratic function or multiple quadratic functions to construct the outer contour function; The outer contour function is fitted to obtain the outer contour fitting curve.

8. The gas phase velocity fitting method for a multi-channel cyclone separator according to claim 7, characterized in that, The step of selecting a single quadratic function or multiple quadratic functions based on the gas velocity distribution data features in the gas velocity distribution map to construct the outer contour function further includes: Determine whether the gas velocity distribution data in the gas velocity distribution map meets the preset error range. If it does, then select a single quadratic function to construct the outer contour fitting function v. t Otherwise, select multiple quadratic functions to construct the outer contour fitting function y. o ; The outer contour fitting function v t for: in t =(a-bx-cx 2 )v in Among them, v t Let v be the gas phase velocity at each location. in Let x be the gas phase velocity at the tangential inlet, x be the axial position, D be the cylinder diameter, and d be the gas phase velocity. c Let n be the core diameter, n be the number of channels, and a, b, and c be the correlation coefficients between the cylinder diameter, core diameter, and number of channels, respectively. The outer contour fitting function y o for: y o =max{y1,y2} y1=(a1-b1x-c1x 2 )v in y2=(a2-b2x-c2x 2 v in Among them, y i Let be the gas phase velocity at each location, and let 'a' be the coefficient. i b i c i These represent the cylinder diameter D and the core cylinder diameter d, respectively. c The correlation coefficient between the number of channels n, i = 1, 2.

9. The gas phase velocity fitting method for a multi-channel cyclone separator according to claim 1, characterized in that, The process of constructing an environmental impact factor function based on the gas velocity distribution map and fitting the environmental impact factor function to obtain the environmental impact factor fitting curve includes: An environmental influencing factor function is constructed based on the characteristics of the air velocity distribution data in the air velocity distribution map. Based on the environmental impact factor function, the environmental impact factor function is fitted to obtain the environmental impact factor fitting curve; The environmental impact factor function is expressed as follows: In the formula, y p For the fitting function of environmental impact factors, l i To fit a quadratic function of the baffle effect, n is the number of channels.

10. The gas phase velocity fitting method for a multi-channel cyclone separator according to claim 1, characterized in that, The process of constructing a total air velocity function based on the outer contour function and the environmental influencing factor function, and then fitting the total air velocity function to obtain the total air velocity fitting curve includes: The outer contour function is superimposed with the environmental influencing factor function to obtain the total air velocity function, and the total air velocity function is fitted based on the total air velocity function to obtain the total air velocity fitting curve. The total air velocity fitting function is expressed as: y=y o +and p In the formula, y represents the total air velocity fitting function, y o Represents the outer contour function, y p This represents a function representing environmental impact factors.

11. A multi-channel cyclone separator gas phase velocity fitting device, characterized in that, include: Modeling unit, used to build the geometric model of a multi-channel cyclone separator; The numerical simulation unit is used to perform numerical simulation of the gas phase velocity at the channel inlet in the geometric model to obtain a gas velocity distribution map. The outer contour function fitting unit is used to construct an outer contour function based on the air velocity distribution map and perform outer contour function fitting to obtain an outer contour fitting curve. The environmental impact factor function fitting unit is used to construct an environmental impact factor function based on the air velocity distribution map and perform environmental impact factor function fitting to obtain an environmental impact factor fitting curve. The total gas velocity function fitting unit is used to construct the total gas velocity function based on the outer contour function and the environmental influencing factor function, and to fit the total gas velocity function to obtain the total gas velocity fitting curve.

12. An electronic device, characterized in that, The device includes at least one processor, and at least one memory and bus connected to the processor; wherein the processor and the memory communicate with each other through the bus; the processor is used to call program instructions in the memory to execute the method as described in any one of claims 1-10.

13. A computer storage medium, characterized in that, The storage medium is used to store a computer program, wherein the computer program, when running, controls the device where the storage medium is located to execute the method described in any one of claims 1-10.

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