CN-122021374-A - Gas phase speed fitting method and device for multichannel cyclone separator and electronic equipment

CN122021374ACN 122021374 ACN122021374 ACN 122021374ACN-122021374-A

Abstract

The invention discloses a gas phase speed fitting method, a device and a storage medium of a multichannel cyclone separator, which comprise the steps of establishing a geometric model of the multichannel cyclone separator, carrying out numerical simulation on gas phase speed at an inlet of a channel of the geometric model, constructing an outer contour function, carrying out outer contour function fitting to obtain an outer contour fitting curve, constructing an environment influence factor function, carrying out environment influence factor function fitting to obtain an environment influence factor fitting curve, constructing a total gas speed function based on the outer contour function and the environment influence factor function, and carrying out total gas speed function fitting to obtain a total gas speed fitting curve. According to the invention, the influence of the separator baffle on the gas flow rate fitting is considered, the gas flow rate is subjected to quadratic function fitting and superposition by adopting the outer contour fitting function and the environment influence factor fitting function, the total gas flow rate fitting curve is obtained, and the fitting result obtained by adopting the high-precision gas phase speed fitting function provided by the invention is more consistent with the reality.

Inventors

LIU WENCAI
KANG ZHIGANG
LIU JIE
YU GANG
ZHANG HAO
XU LI
CAI WEIJIANG
SU MOLIN

Assignees

中国石油天然气股份有限公司
中国石油集团安全环保技术研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20241112

Claims (13)

1. A method for fitting gas phase velocity of a multi-channel cyclone separator, comprising: establishing a geometric model of the multichannel cyclone separator; performing numerical simulation on the gas phase velocity at the inlet of the channel in the geometric model to obtain a gas velocity distribution diagram; constructing an outer contour function based on the air velocity distribution diagram, and fitting the outer contour function to obtain an outer contour fitting curve; constructing an environmental influence factor function based on the gas velocity distribution diagram, and performing environmental influence factor function fitting to obtain an environmental influence factor fitting curve; And constructing a total air speed function based on the outer contour function and the environment influence factor function, and performing total air speed function fitting to obtain a total air speed fitting curve.
2. The method of fitting a gas phase velocity of a multi-channel cyclone separator according to claim 1, wherein said establishing a geometric model of the multi-channel cyclone separator comprises: And establishing a geometric model of the multichannel cyclone separator according to the structural characteristics and the structural dimensions of the multichannel cyclone separator.
3. The method for fitting gas phase velocity of a multi-channel cyclone separator according to claim 1, wherein the performing numerical simulation on the gas phase velocity at the inlet of the channel in the geometric model to obtain a gas velocity distribution map comprises: adopting a turbulence model, a discrete phase model, an Euler wall surface liquid film model and related parameters to carry out numerical simulation on the gas phase velocity of the section at the inlet of the separator channel to obtain a plurality of gas velocity distribution data; generating a gas velocity distribution map based on a plurality of the gas velocity distribution data.
4. A method for fitting gas phase velocity of a multi-channel cyclone separator according to claim 3, wherein the turbulence model is RNG k- ε model, The transport equation of the RNG k-epsilon model is as follows: Where ρ is the fluid density, t is the time, K is the turbulent energy, u i 、u j is the velocity component in the i-direction, j-direction, x i 、x j is the i-direction and j-direction positions, α k and α ε are the inverse of the effective prandtl numbers of K and ε, μ eff is the effective velocity, G k represents the turbulent kinetic energy generation term due to the average velocity gradient, And C 2ε is a constant.
5. A method for fitting a gas phase velocity of a multi-channel cyclone separator according to claim 3, wherein the discrete phase model is a DPM model, The particle motion equation of the DPM model is as follows: Where u is the air velocity, u p is the drop movement velocity, F D is the drag force experienced by the drop, F G is the gravitational force experienced by the drop, and F x is the force associated with the drop; The drop drag force F D is expressed as: Wherein ρ is the fluid density, C D is the drag coefficient, A is the windward area of the droplet; drag coefficient C D is expressed as: Where Re p is the drop Reynolds number.
6. A gas phase velocity fitting method for a multi-channel cyclone separator according to claim 3, wherein the euler wall liquid film model calculates the behavior of liquid drops or liquid films on the wall surface by using a continuous distribution euler description method of fluid in space.
7. The method for fitting gas phase velocity of a multi-channel cyclone separator according to claim 1, wherein the constructing an outer contour function based on the gas velocity distribution map and fitting the outer contour function to obtain an outer contour fitting curve comprises: Selecting a single quadratic function or a plurality of quadratic functions to construct an outer contour function based on the gas velocity distribution data characteristics in the gas velocity distribution map; and carrying out outer contour function fitting based on the outer contour function to obtain an outer contour fitting curve.
8. The multi-channel cyclone gas phase velocity fitting method of claim 7, wherein the selecting a single quadratic function or a plurality of quadratic functions to construct an outer contour function based on the gas velocity profile data features in the gas velocity profile further comprises: Judging whether the gas velocity distribution data in the gas velocity distribution diagram meets a preset error range, if so, selecting a single quadratic function to construct an outer contour fitting function v t , otherwise, selecting a plurality of quadratic functions to construct an outer contour fitting function y o ; the outer contour fitting function v t is: v t ＝(a-bx-cx 2 )v in Wherein v t is the gas phase velocity at each position, v in is the gas phase velocity at the tangential inlet, x is the axial position, D is the cylinder diameter, D c is the core cylinder diameter, n is the number of channels, and a, b, c are the correlation coefficients of the cylinder diameter, the core cylinder diameter and the number of channels, respectively; the outer contour fitting function y o is: y o ＝max{y 1 ,y 2 } y 1 ＝(a 1 -b 1 x-c 1 x 2 )v in y 2 ＝(a 2 -b 2 x-c 2 x 2 )v in Where y i is the gas phase velocity at each position, and the coefficient a i 、b i 、c i represents the correlation coefficients of the cylinder diameter D, the core cylinder diameter D c , and the number of channels n, i=1, 2, respectively.
9. The method for fitting gas phase velocity of a multi-channel cyclone separator according to claim 1, wherein the constructing an environmental influence factor function based on the gas velocity distribution map and performing the environmental influence factor function fitting to obtain an environmental influence factor fitting curve comprises: Constructing an environmental impact factor function based on the gas velocity distribution data characteristics in the gas velocity distribution map; performing environmental influence factor function fitting based on the environmental influence factor function to obtain an environmental influence factor fitting curve; wherein the environmental impact function is expressed as: Where y p is the environmental impact factor fitting function, l i is the quadratic function of the fitting baffle impact, and n is the number of channels.
10. The method of claim 1, wherein constructing a total gas velocity function based on the outer contour function and the environmental impact factor function and performing a total gas velocity function fit to obtain a total gas velocity fit curve comprises: Superposing the outer contour function and the environmental influence factor function to obtain a total air speed function, and fitting the total air speed function based on the total air speed function to obtain a total air speed fitting curve; the total air velocity fitting function is expressed as: y=y o +y p Where y represents the total air velocity fitting function, y o represents the outer contour function, and y p represents the environmental impact factor function.
11. A multi-channel cyclone separator gas phase velocity fitting apparatus, comprising: the modeling unit is used for establishing a geometric model of the multichannel cyclone separator; The numerical simulation unit is used for performing numerical simulation on the gas phase velocity at the inlet of the channel in the geometric model to obtain a gas velocity distribution diagram; The outer contour function fitting unit is used for constructing an outer contour function based on the air velocity distribution diagram and fitting the outer contour function to obtain an outer contour fitting curve; the environment influence factor function fitting unit is used for constructing an environment influence factor function based on the gas velocity distribution diagram and fitting the environment influence factor function to obtain an environment influence factor fitting curve; And the total air speed function fitting unit is used for constructing a total air speed function based on the outer contour function and the environment influence factor function and performing total air speed function fitting to obtain a total air speed fitting curve.
12. An electronic device, characterized in that the device comprises at least one processor and at least one memory connected to the processor, a bus, wherein the processor and the memory are in communication with each other via the bus, and the processor is arranged to invoke program instructions in the memory for performing the method according to any of the claims 1-10.
13. A computer storage medium for storing a computer program, wherein the computer program when run controls a device in which the storage medium is located to perform the method of any one of claims 1-10.

Description

Gas phase speed fitting method and device for multichannel cyclone separator and electronic equipment Technical Field The invention belongs to the technical field of gas-liquid separation, and particularly relates to a gas phase speed fitting method and device of a multichannel cyclone separator and electronic equipment. Background The reciprocating compressor is a key device in the energy field, the volume of a cylinder body is periodically changed through the reciprocating motion of a piston in the cylinder, the pressurization and the transportation of gas are realized, and in the working process of the reciprocating compressor, if gas and liquid enter the compressor, the liquid occupies the clearance space of the compressor, and the liquid impact phenomenon occurs. In order to meet the requirement of the inlet gas liquid content of the reciprocating compressor, a high-efficiency gas-liquid separation device needs to be selected. The multichannel cyclone separator has the advantages of simple structure, large treatment gas amount and high separation efficiency, and becomes an ideal choice. The multi-channel cyclone separator is based on a cut-in cyclone separator structure, and airflow enters the separator from a tangential inlet and then enters a multi-channel space formed by arc-shaped baffles. The separation efficiency is a key performance parameter of the multi-channel cyclone separator, the size and the distribution of the gas phase speed directly influence the movement track and the separation effect of liquid drops, and the construction of a separation efficiency model and the accurate prediction of the efficiency depend on a speed function in the multi-channel cyclone separator. Thus, an accurate description of the velocity function is critical to predicting separation efficiency. The research of the multi-channel cyclone separator is focused on the research of internal structure improvement and liquid drop behavior, wherein the research of speed is mainly carried out by adopting a traditional method, such as fitting the inlet air speed of a multi-stage demister by adopting a quadratic polynomial mode, and carrying out simulation research on a speed field in the separator, and further, for example, in the research of the critical grain diameter of the multi-channel cyclone separator, the air speed is assumed to be uniformly distributed, and the calculation of the critical grain diameter and the design of the channel number are carried out based on the assumption. The method can fit the gas flow rate in the multichannel cyclone separator to a certain extent, but due to the baffle inside the multichannel cyclone separator, the problems of flow field conditions nearby the baffle, internal flow field non-uniformity and the like are difficult to reflect by adopting the method, and the gas flow rate inside the multichannel cyclone separator cannot be accurately reflected. In addition, in the multi-channel cyclone separator, the gas mainly takes on a spiral rising form in the inner flow form, and multi-layer gas cyclone can occur. In the process, gas diffusion and friction phenomenon between the layers can cause the gas to be attenuated in the motion of the multi-channel cyclone separator, and the process is not considered in the establishment of a speed field, so that the speed prediction accuracy is affected. Disclosure of Invention In order to solve the problems, the invention provides a gas phase speed fitting method, a gas phase speed fitting device and a storage medium of a multichannel cyclone separator, which are used for solving the problems that the condition of a flow field near a baffle and the non-uniformity of an internal flow field are difficult to reflect, the internal gas speed of the multichannel cyclone separator cannot be accurately reflected and the speed prediction accuracy is further affected in the traditional gas flow speed fitting method of the multichannel cyclone separator. A multi-channel cyclone separator gas phase velocity fitting method comprising: establishing a geometric model of the multichannel cyclone separator; performing numerical simulation on the gas phase velocity at the inlet of the channel in the geometric model to obtain a gas velocity distribution diagram; Constructing an outer contour function based on the air velocity distribution diagram, and fitting the outer contour function to obtain an outer contour fitting curve; constructing an environmental influence factor function based on the gas velocity distribution diagram, and performing environmental influence factor function fitting to obtain an environmental influence factor fitting curve; And constructing a total air speed function based on the outer contour function and the environmental impact factor function, and performing total air speed function fitting to obtain a total air speed fitting curve. According to an embodiment of the invention, establishing a geometric model of a multi-channel cyclone se