Gas-liquid separator regulation method based on dynamic parameters

Abstract

The present application relates to a kind of gas-liquid separator regulation and control method based on dynamic parameter, belong to mechanical design and fluid separation technical field.It includes: in combination with the dynamics analysis of liquid phase flow particle in gas-liquid separator, establishes the radial balance control equation and axial balance control control equation of liquid phase flow particle;Considering the motion characteristics of liquid phase flow particle in gas-liquid separator, simplify secondary factor, obtain the dynamic balance control equation of liquid phase flow particle;In the non-inertial system with liquid phase flow particle as reference system, in combination with the principle of non-inertial system, and utilize stokes law to construct the dynamic parameter differential control equation of liquid phase flow particle, the dynamic parameter control equation of liquid phase flow particle is obtained using integral solution method;Respectively establish the dynamic parameter control equation of liquid phase flow particle applicable to different inlet shape to regulate and control the structure or dynamic parameter of gas-liquid separator.The present application has low cost, optimization time is short, can realize dynamic parameter regulation and control and structure component adjustment complement.

Description

Technical Field

[0001] This invention belongs to the field of mechanical design and fluid separation technology, and relates to coal mine gas control and utilization, specifically to a gas-liquid separator control method based on dynamic parameters. Background Technology

[0002] Currently, the main methods to improve the gas-liquid separation efficiency of gas separators include four types: improving the inlet structure, adding internal components, adjusting the external dimensions of the separator, and improving the outlet structure.

[0003] The methods for improving the inlet structure include using a tangential inlet and optimizing the inlet angle. A tangential inlet means that the gas-liquid two-phase flow enters the separator along the tangential direction, and centrifugal force causes the liquid phase to move towards the inner wall of the separator and separate. Optimizing the inlet angle involves adjusting the angle between the inlet pipe and the separator axis to find the optimal angle, so that the gas-liquid two-phase flow can form a stable flow field after entering the separator. However, the optimal inlet angle needs to be determined through experiments or simulations based on actual operating conditions.

[0004] There are three methods for adding internal components: installing baffles, installing swirl vanes, and adding packing. Installing baffles involves placing zigzag baffles inside the separator, causing the gas-liquid two-phase flow to change direction multiple times. The liquid phase separates from the gas phase due to inertia. However, the shape, size, and arrangement of the baffles need continuous adjustment to achieve the desired gas-liquid separation effect. Installing swirl vanes involves placing guide vanes inside the separator, causing the gas-liquid two-phase flow to rotate at high speed as it passes through the vanes, thus enhancing centrifugal separation. However, parameters such as the angle, spacing, and height of the swirl vanes need continuous optimization to achieve the best gas-liquid separation effect. Adding packing involves filling the separator with suitable packing material. By increasing the gas-liquid contact area, the liquid phase flows more easily to adhere to the packing surface and coalesce, thus achieving gas-liquid separation. However, different types of packing are suitable for different operating conditions and must be selected based on the properties of the gas-liquid two-phase flow.

[0005] Adjusting the dimensions of a separator can be done in two ways: increasing its height and changing its diameter. Increasing the separator height extends the residence time of the gas-liquid two-phase flow within the separator, allowing the liquid phase more time to settle and separate. Changing the separator diameter alters the gas velocity and flow field distribution, but this requires optimization based on specific gas-liquid flow rates and separation requirements.

[0006] One way to improve the outlet structure is to optimize the outlet positions and shapes of the liquid and gas phase flows, thereby improving the gas-liquid separation efficiency.

[0007] It is evident that current methods for improving the gas-liquid separation efficiency of gas-liquid separators involve optimizing the separator's structural components. This component-based optimization approach relies on experience and conventional theoretical analysis to improve the overall structure or components of the separator, lacking a deep understanding of the microscopic motion characteristics within the gas-liquid two-phase flow, resulting in low accuracy. Furthermore, the operating conditions of gas-liquid separators often change with time and production conditions; once the structure is determined using component optimization, it becomes relatively fixed, exhibiting poor dynamic adaptability. Moreover, this component-based optimization method requires extensive testing and improvements, involving the replacement of different components and redesign and manufacturing, resulting in high costs and long processing times. Summary of the Invention

[0008] In view of this, the purpose of this invention is to provide a gas-liquid separator control method based on dynamic parameters, which solves the technical problems of low accuracy, poor dynamic adaptability, high investment cost and long optimization time of existing gas-liquid separator structural component optimization methods.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A method for controlling a gas-liquid separator based on dynamic parameters, characterized in that the method includes:

[0011] Based on the dynamic analysis of liquid flow particles in a gas-liquid separator, and using Newton's first law, radial and axial equilibrium control equations for liquid flow particles are established.

[0012] By simplifying the minor factors by considering the motion characteristics of liquid phase flow particles in the gas-liquid separator, the dynamic equilibrium control equation of liquid phase flow particles is obtained.

[0013] In a non-inertial frame with liquid flow particles as the reference frame, the dynamic parameter differential control equations of liquid flow particles are constructed by combining the principle of non-inertial frames and using Stokes' law, and the dynamic parameter control equations of liquid flow particles are obtained by using the integral solution method.

[0014] For different inlet structural shapes of gas-liquid separators, based on the obtained liquid phase flow particle dynamic parameter control equations, control equations for liquid phase flow particle dynamic parameters applicable to different inlet shapes are established to regulate the structural or dynamic parameters of the gas-liquid separator.

[0015] For a portion of the equations, establish the radial and axial equilibrium control equations for the liquid phase flow particles:

[0016] Along the radial direction of the gas-liquid separator, the liquid phase particles are subjected to centrifugal force, inertial force, radial friction force, radial pressure difference force, and radial buoyancy force. Based on the principle of force balance, the radial equilibrium control equation for the liquid phase particles is established as follows:

[0017] F c -F ir -F dr -F br -F Δpr =0

[0018] In the formula, F c For centrifugal force; F ir For radial inertial force; F dr Radial gas viscous resistance; F br Radial buoyancy; F Δpr This is the radial pressure difference force;

[0019] Along the axial direction of the gas-liquid separator, the liquid phase particles are subjected to gravity, axial friction, axial pressure difference, and axial buoyancy. Based on the principle of force balance, the axial equilibrium control equation for the liquid phase particles is established as follows:

[0020] F g -F dz -F iz -F bz -F Δpz =0

[0021] In the formula, F g For gravity; F dz For axial gas viscous resistance; F iz For axial inertial force; F bz For axial buoyancy; F Δpz This is the force exerted by the axial pressure difference.

[0022] Neglecting the buoyancy, gravity, and pressure difference forces acting on the liquid flow particles in the gas-liquid separator, the dynamic equilibrium control equations for the liquid flow particles are obtained:

[0023] F c -F d -F i =0

[0024] In the formula, F c For centrifugal force; F d For gas viscous resistance; F i It is an inertial force.

[0025] Furthermore, based on the circular motion of liquid phase particles in the gas-liquid separator, a centrifugal force equal in magnitude and opposite in direction to the centripetal force is introduced into a non-inertial frame with the liquid phase particles as the reference frame. Applying Newton's laws, the centrifugal force is expressed as:

[0026]

[0027] In the formula, m is the mass of the liquid phase particle; V t Let R be the average linear velocity of the liquid flow particles; R be the radius of rotation of the liquid flow particles; and according to the law of inertia, the inertial force acting on the liquid flow particles is determined as follows:

[0028]

[0029] In the formula, t is the residence time of liquid phase particles in the separator;

[0030] When liquid phase particles move in the separator, they are subjected to the viscous drag of gas. According to Stokes' law, the viscous drag of gas on the liquid phase particles is:

[0031] F d =6rπμV

[0032] In the formula, r is the radius of the liquid phase flow particles; μ is the viscosity coefficient of the gas; and V is the velocity of the liquid phase flow particles within the separator.

[0033] Based on the dynamic equilibrium control equations of liquid flow particles, the differential control equations for the dynamic parameters of liquid flow particles are established as follows:

[0034] The governing equations for the dynamic parameters of the liquid phase flow particles are obtained using an integral solution method: Ignoring the exponential terms, the dynamic parameter control equations for liquid phase particles within the separator are obtained as follows:

[0035] Furthermore, the gas-liquid separator includes circular, rectangular, and tapered inlet structural shapes.

[0036] Furthermore, for a gas-liquid separator with a circular inlet structure, based on the relationship between flow rate and velocity:

[0037] Q = AV i

[0038]

[0039] In the formula, Q is the inlet volumetric flow rate; V i d is the inlet velocity; A is the cross-sectional area of ​​the circular inlet of the gas-liquid separator; d is the diameter of the circular inlet.

[0040] Using the radius of the separator cylinder as the average radius of the liquid phase particle rotation and the inlet velocity of the separator as the average linear velocity of the particle rotation, a simplified model V is established. t With V iThe relationship is as follows:

[0041]

[0042] In the formula, R1 is the radius of the gas-liquid separator cylinder; substituting into the equation... In the process, the governing equations for the dynamic parameters of the liquid phase flow particles at the circular inlet are obtained as follows:

[0043] When the structure of the gas-liquid separator is fixed, the separation efficiency of the gas-liquid separator can be improved by adjusting the dynamic parameters V and Q in real time. When the structure of the separator is not fixed, the separation efficiency of the gas-liquid separator can be improved by adjusting the circular inlet diameter d and the cylinder radius R1 according to the target dynamic parameters V and Q.

[0044] Furthermore, for a gas-liquid separator with a rectangular inlet structure, based on the relationship between flow rate and velocity:

[0045] Q = AV i

[0046] A = wh

[0047]

[0048] In the formula, w is the width of the rectangular section; h is the height of the rectangular section;

[0049] Using the radius of the separator cylinder as the average radius of the liquid phase particle rotation and the inlet velocity of the separator as the average linear velocity of the particle rotation, a simplified model V is established. t With V i The relationship is as follows:

[0050]

[0051] In the formula, R1 is the radius of the gas-liquid separator cylinder; substituting into the equation... In the process, the governing equations for the dynamic parameters of the liquid phase flow particles at the rectangular inlet are obtained as follows:

[0052] When the structure of the gas-liquid separator is fixed, the separation efficiency of the gas-liquid separator can be improved by adjusting the dynamic parameters V and Q in real time. When the structure of the separator is not fixed, the cylinder radius R1, rectangular inlet height h and rectangular inlet width w of the gas-liquid separator can be adjusted according to the target dynamic parameters V and Q to achieve high-efficiency gas-liquid separation.

[0053] Furthermore, for a gas-liquid separator with a tapered inlet structure, considering the relationship between flow rate and velocity, according to the continuity equation:

[0054] Q1 = A1V1

[0055] Q2 = A2V2

[0056]

[0057] Q1 = Q2

[0058]

[0059] In the formula, Q1 is the volumetric flow rate at the large end inlet; Q2 is the volumetric flow rate at the small end inlet; A1 is the cross-sectional area at the large end inlet; A2 is the cross-sectional area at the small end inlet; V1 is the velocity at the large end inlet; V2 is the velocity at the small end inlet; d1 is the diameter at the large end inlet; d2 is the diameter at the small end inlet.

[0060] The governing equations for the dynamic parameters of the liquid phase flow particles at the tapered inlet are as follows: V i =V1.

[0061] When the structure of the gas-liquid separator is fixed, the dynamic parameters V and V1 are adjusted in real time to maintain the gas-liquid separator in a state of high-efficiency gas-liquid separation. When the separator structure is not fixed, the cylinder radius R1, the large end inlet diameter d1, and the small end inlet diameter d2 of the gas-liquid separator are adjusted according to the target dynamic parameters V and V1 to maintain the gas-liquid separator in a state of high-efficiency gas-liquid separation.

[0062] The beneficial effects of this invention are as follows:

[0063] (1) Higher precision: Traditional structural component optimization methods are based on experience and conventional theoretical analysis, improving the overall structure or components of the separator, but lack an understanding of the microscopic motion characteristics inside the gas-liquid two-phase flow. In contrast, the dynamic parameter-based control method takes liquid phase flow particles as the object and constructs dynamic parameter control equations between the liquid phase flow particle motion parameters and the gas-liquid separator structure. It can determine the velocity distribution of liquid phase flow particles in the separator through more accurate numerical calculations, and can more accurately find the key areas and existing problems in gas-liquid separation, achieving more precise separator structure adjustment, thus achieving higher precision.

[0064] (2) Enhanced Dynamic Adaptability: The operating conditions of gas-liquid separators often change with time and production conditions. Traditional structural component optimization methods, once the structure is determined, are relatively fixed and difficult to adapt to dynamic changes in operating conditions. However, the control method based on dynamic parameters can adjust dynamic parameters such as the velocity of liquid phase particles and the inlet volumetric flow rate in real time, and adjust the structure or operating parameters of the separator in a timely manner to maintain the efficient gas-liquid separation state of the gas-liquid separator in real time, thus exhibiting stronger dynamic adaptability.

[0065] (3) Lower cost and shorter optimization time: Traditional structural component optimization requires a lot of testing and improvement, involving the replacement of different components and redesign and manufacturing, which is costly and time-consuming. However, the dynamic parameter-based control method can improve the gas-liquid separation efficiency of the gas-liquid separator by measuring dynamic parameters such as liquid phase flow particle velocity, inlet volume flow rate, and large-end inlet velocity, without large-scale structural modifications, by fine-tuning or controlling the dynamic parameters of the existing structure. Therefore, it is cheaper and takes less time to optimize.

[0066] (4) Complementary dynamic parameter control and structural component adjustment: Based on the established dynamic parameter control equation of liquid phase flow particles, key dynamic parameters (liquid phase flow particle velocity, inlet volume flow rate, inlet velocity, etc.) can be determined, thereby adjusting the structural components of the gas-liquid separator (inlet structural size, shape, cylinder diameter, etc.); in addition, given a fixed structure of the gas-liquid separator, the gas-liquid separation efficiency of the gas-liquid separator can be improved by controlling the dynamic parameters. Therefore, the complementarity between dynamic parameter control and structural component adjustment can be achieved.

[0067] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0068] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0069] Figure 1 A schematic flowchart of a gas-liquid separator control method based on dynamic parameters provided in an embodiment of the present invention;

[0070] Figure 2 A schematic diagram of the dynamic parameter control process for a circular inlet gas-liquid separator.

[0071] Figure 3 A schematic diagram of the dynamic parameter control process for a rectangular inlet gas-liquid separator.

[0072] Figure 4 This is a schematic diagram of the dynamic parameter control process for a gas-liquid separator with a tapered inlet. Detailed Implementation

[0073] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0074] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0075] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0076] like Figure 1 The figure shows a method for controlling a gas-liquid separator based on dynamic parameters according to an embodiment of the present invention. The method includes:

[0077] I. Establishing the governing equations for the dynamic equilibrium of particles in liquid phase flow

[0078] Liquid flow particles are subjected to centrifugal force, gravity, inertial force, gas viscous resistance, buoyancy and pressure difference force while rotating at high speed in the separator. According to Newton's first law and the composition and decomposition of forces, radial balance control equations and axial balance control equations can be established.

[0079] (1) Establish the radial balance control equation

[0080] Along the radial direction of the gas-liquid separator, the liquid phase particles are subjected to centrifugal force, inertial force, radial friction force, radial pressure difference force, and radial buoyancy force. Based on the principle of force balance, the radial equilibrium control equation for the liquid phase particles can be established:

[0081] Fc -F ir -F dr -F br -F Δpr =0(1)

[0082] In the formula, F c F is centrifugal force, measured in N. ir F is the radial inertial force, measured in N. dr Radial gas viscous resistance, N; F br Radial buoyancy, N; F Δpr The radial pressure difference force is N.

[0083] (2) Establish the axial balance control equation

[0084] Along the axial direction of the gas-liquid separator, the liquid phase particles are subjected to gravity, axial friction, axial pressure difference, and axial buoyancy. Based on the force balance, the axial equilibrium control equation for the liquid phase particles can be established:

[0085] F g -F dz -F iz -F bz -F Δpz =0(2)

[0086] In the formula, F g For gravity, N; F dz For axial gas viscous resistance, N; F iz For axial inertial force, N; F bz For axial buoyancy, N; F Δpz The force is the axial pressure difference force, in N.

[0087] Considering that the density of water is 1000 kg / m³ 3 The density of methane is 0.716 kg / m³. 3 Since the density of water is much greater than that of gas, the buoyancy force on liquid flow particles in the separator can be ignored. Furthermore, when liquid flow particles rotate at high speed in the separator, the centrifugal force they experience is much greater than the forces of gravity and pressure difference; therefore, the forces of gravity and pressure difference can also be ignored. Based on this, the dynamic equilibrium control equations for liquid flow particles can be established:

[0088] F c -F d -F i =0 (3)

[0089] In the formula, F c Centrifugal force, N; F d For gas viscous resistance, N; F i The force is inertial, N.

[0090] II. Establishing the differential governing equations for the dynamic parameters of liquid phase flow particles

[0091] Liquid flow particles undergo approximately circular motion within the separator, and their motion requires centripetal force to maintain it. When the liquid flow particles are taken as the reference frame, this is a non-inertial frame. To apply Newton's laws in this non-inertial frame, a centrifugal force needs to be introduced. The centrifugal force is equal in magnitude and opposite in direction to the centripetal force. Therefore, the centrifugal force acting on the liquid flow particles can be determined as follows:

[0092]

[0093] In the formula, m is the mass of the liquid phase flow particles, kg; V t R is the average linear velocity of the liquid flow particles, in m / s; R is the radius of rotation of the liquid flow particles, in m.

[0094] When liquid-phase particles move in the separator, they are subjected to the viscous drag of gas. According to Stokes' law, the viscous drag of gas on the liquid-phase particles can be determined as follows:

[0095] F d =6rπμV (5)

[0096] In the formula, r is the particle radius of the liquid phase flow, in meters; μ is the viscosity coefficient of the gas, in N·m / s. 2 V represents the velocity of the liquid phase particles within the separator, in m / s.

[0097] In the non-inertial reference frame of the liquid flow particles, the inertial force acting on the liquid flow particles can be determined according to the law of inertia:

[0098]

[0099] In the formula, tt is the residence time of liquid phase particles in the separator, in seconds.

[0100] Based on the above analysis and combined with the dynamic equilibrium control equations for liquid-phase flow particles, the differential control equations for the dynamic parameters of liquid-phase flow particles can be established:

[0101]

[0102] III. Establishing the governing equations for the dynamic parameters of liquid phase flow particles

[0103] Based on the differential control equations for the dynamic parameters of particles in liquid flow, the control equations for the dynamic parameters of particles in liquid flow can be determined using the integral solution method:

[0104]

[0105] In the formula, let (Constant term) When the velocity of liquid phase flow particles in the separator is greater than 5τ, the velocity V of liquid phase flow particles has basically reached the final velocity. Based on this, the time for liquid phase flow particles of different sizes to reach the final velocity can be determined.

[0106] Based on fluid mechanics theory, assuming the liquid phase particles are incompressible spheres, the constant term τ can be determined:

[0107]

[0108] In the formula, r represents the radius of a water molecule (0.15 nm) and ρ represents the density of water (1000 kg / m³). 3 μ is taken as the viscosity coefficient of methane gas, which is 1.3 × 10⁻⁶. -5 From Pa·s, we can obtain τ≈0.004s, 5τ=0.02s. It is evident that the acceleration time of the liquid flow particles is very short compared to their residence time in the separator. Therefore, the exponential term in the dynamic parameter control equation for the liquid flow particles can be neglected, yielding the dynamic parameter control equation for the liquid flow particles within the separator:

[0109]

[0110] IV. Since different inlet structures of gas-liquid separators require different control equations for the dynamic parameters of liquid phase flow particles, control equations for the dynamic parameters of liquid phase flow particles applicable to different inlet shapes are established as follows:

[0111] (1) Establish the dynamic parameter control equations for the liquid phase flow particles at the circular inlet.

[0112] For a gas-liquid separator with a circular inlet, based on the relationship between flow rate and velocity, the following relationship can be obtained:

[0113] Q = AV i (11)

[0114]

[0115] In the formula, Q is the inlet volumetric flow rate, m 3 / h;V i The inlet velocity is denoted as ρ, m / s; A is the cross-sectional area of ​​the circular inlet of the gas-liquid separator, m². 2 d is the diameter of the circular inlet, in meters.

[0116] Due to the average linear velocity V of the liquid phase particles in the separator t Difficult to determine, a reasonable simplification is achieved by using the average substitution method, taking the radius of the separator cylinder as the average radius of the liquid phase particle rotation, and the separator inlet velocity as the average linear velocity of the particle rotation. This allows for the establishment of V... t With V i Relationship:

[0117]

[0118] In the formula, R1 is the radius of the gas-liquid separator cylinder, in meters.

[0119] By combining equations (9), (10), (13), and (14), the dynamic parameter control equations for liquid phase flow particles at a circular inlet can be established:

[0120]

[0121] (2) Establish the dynamic parameter control equations for the liquid phase flow particles at the rectangular inlet.

[0122] For a gas-liquid separator with a rectangular inlet, based on the relationship between flow rate and velocity, the following relationship can be obtained:

[0123] Q = AV i (16)

[0124] A = wh (17)

[0125]

[0126] In the formula, w is the width of the rectangular section, in meters; h is the height of the rectangular section, in meters.

[0127] By combining equations (9), (10), (14), and (18), the dynamic parameter control equations for liquid phase flow particles with a rectangular inlet can be established:

[0128]

[0129] (3) Establish the dynamic parameter control equations for the liquid phase flow particles at the tapered inlet.

[0130] Based on a gas-liquid separator with a tapered inlet, and considering the relationship between flow rate and velocity, the following relationship can be established according to the continuity equation:

[0131] Q1 = A1V1 (20)

[0132] Q2=A2V2 (21)

[0133]

[0134] Q1 = Q2 (24)

[0135]

[0136] In the formula, Q1 is the volumetric flow rate at the large inlet, in m³ / s. 3 / h; Q2 is the volumetric flow rate at the small-end inlet, m 3 / h; A1 is the cross-sectional area of ​​the large-end inlet, m²2 A2 is the cross-sectional area of ​​the small-end inlet, in meters. 2 V1 is the flow velocity at the large end inlet, m / s; V2 is the flow velocity at the small end inlet, m / s; d1 is the diameter of the large end inlet, m; d2 is the diameter of the small end inlet, m.

[0137] By combining equations (9), (10), (14), and (25), the dynamic parameter control equations for liquid phase flow particles with a tapered inlet can be established:

[0138]

[0139] Among them, let V i =V1.

[0140] V. Specific Control Methods for Gas-Liquid Separators Based on Dynamic Parameters

[0141] Control equations for particle dynamic parameters of liquid phase flow with circular inlet, liquid phase flow with rectangular inlet, and liquid phase flow with tapered inlet.

[0142] (1) Dynamic parameter control method for circular inlet gas-liquid separator

[0143] like Figure 2 As shown, based on the control equations for the dynamic parameters of the liquid phase flow particles at the circular inlet, the key dynamic parameters are determined: the liquid phase flow particle velocity V and the inlet volumetric flow rate Q of the gas-liquid two-phase flow. When the separator structure is fixed, the separation efficiency of the gas-liquid separator is improved by real-time adjustment of the dynamic parameters V and Q. When the separator structure is not fixed, the separation efficiency of the gas-liquid separator is improved by adjusting the circular inlet diameter d and the cylinder radius R1 according to the target dynamic parameters V and Q.

[0144] (2) Dynamic parameter control method for rectangular inlet gas-liquid separator

[0145] like Figure 3 As shown, based on the control equations for the dynamic parameters of the liquid phase flow particles at the rectangular inlet, the key dynamic parameters are determined: the liquid phase flow particle velocity V and the inlet volumetric flow rate Q of the gas-liquid two-phase flow. When the separator structure is fixed, the separation efficiency of the gas-liquid separator is improved by real-time adjustment of the dynamic parameters V and Q. When the separator structure is not fixed, the cylinder radius R1, the rectangular inlet height h, and the rectangular inlet width w of the gas-liquid separator are adjusted according to the target dynamic parameters V and Q. Through structural adjustment of the dynamic parameters and real-time control of the dynamic parameters of the fixed structure, the gas-liquid separator maintains high-efficiency gas-liquid separation.

[0146] (3) Dynamic parameter control method for gas-liquid separator with tapered inlet

[0147] like Figure 4 As shown, based on the control equations for the dynamic parameters of the liquid phase flow particles at the tapered inlet, two key dynamic parameters, V and V1, are determined. When the separator structure is fixed, the dynamic parameters V and V1 are adjusted in real time to maintain efficient gas-liquid separation. When the separator structure is not fixed, the cylinder radius R1, the large-end inlet diameter d1, and the small-end inlet diameter d2 of the gas-liquid separator are adjusted according to the target dynamic parameters V and V1. This achieves precise adjustment of the separator based on dynamic parameters and real-time control of dynamic parameters based on the fixed structure of the separator, thus achieving efficient gas-liquid separation.

[0148] In summary, this invention combines the dynamic analysis of liquid-phase flow particles in a gas-liquid separator. Based on Newton's first law, it establishes radial and axial equilibrium control equations for the liquid-phase flow particles. By simplifying minor factors, it establishes dynamic equilibrium control equations for the liquid-phase flow particles. Combining the concept of non-inertial frames and utilizing Stokes' law, it constructs differential control equations for the dynamic parameters of the liquid-phase flow particles. Based on the inlet structure shape of the gas-liquid separator, and using fluid mechanics theory and calculus methods, it establishes dynamic parameter control equations for circular inlet, rectangular inlet, and tapered inlet liquid-phase flow particles. These equations are used to adjust and regulate the structure and dynamic parameters of the gas-liquid separator, thereby improving the gas-liquid separation efficiency of the gas-liquid separator.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for controlling a gas-liquid separator based on dynamic parameters, characterized in that, The method includes: Based on the dynamic analysis of liquid-phase particles in a gas-liquid separator, and using Newton's first law, radial and axial equilibrium control equations for the liquid-phase particles are established. The radial equilibrium control equations are established because, along the radial direction of the gas-liquid separator, the liquid-phase particles are subjected to centrifugal force, inertial force, radial friction, radial pressure difference, and radial buoyancy. The radial equilibrium control equations are established based on the principle of force balance. Similarly, the axial equilibrium control equations are established because, along the axial direction of the gas-liquid separator, the liquid-phase particles are subjected to gravity, axial friction, axial pressure difference, and axial buoyancy. The axial equilibrium control equations are established based on the principle of force balance. By simplifying the secondary factors by considering the motion characteristics of liquid flow particles in the gas-liquid separator, ignoring the buoyancy, gravity and pressure difference forces acting on the liquid flow particles in the gas-liquid separator, and only considering the centrifugal force, gas viscous resistance and inertial force acting on the liquid flow particles, the dynamic equilibrium control equation of the liquid flow particles is obtained. In a non-inertial frame with the liquid flow particles as the reference frame, the quantitative expression of centrifugal force is determined based on the principle of non-inertial frames and Newton's laws. Based on the velocity of the liquid flow particles in the separator, the quantitative expression of inertial force is determined based on the law of inertia. Stokes' law is used to determine the quantitative expression of gas viscous resistance. Combining the quantitative expressions of centrifugal force, inertial force, and gas viscous resistance, the differential control equations of the dynamic parameters of the liquid flow particles are constructed, and the integral solution method is used to obtain the control equations of the dynamic parameters of the liquid flow particles. For different inlet structural shapes of gas-liquid separators, based on the obtained liquid phase flow particle dynamic parameter control equations, control equations for liquid phase flow particle dynamic parameters applicable to different inlet shapes are established to regulate the structural or dynamic parameters of the gas-liquid separator.

2. The method according to claim 1, characterized in that, Along the radial direction of the gas-liquid separator, the liquid phase particles are subjected to centrifugal force, inertial force, radial friction force, radial pressure difference force, and radial buoyancy force. Based on the principle of force balance, the radial equilibrium control equation for the liquid phase particles is established as follows: In the formula, It is centrifugal force; It is a radial inertial force; Radial gas viscous resistance; Radial buoyancy; This is the radial pressure difference force; Along the axial direction of the gas-liquid separator, the liquid phase particles are subjected to gravity, axial friction, axial pressure difference, and axial buoyancy. Based on the principle of force balance, the axial equilibrium control equation for the liquid phase particles is established as follows: In the formula, For gravity; For axial gas viscous resistance; It is an axial inertial force; This refers to axial buoyancy. This is the force exerted by the axial pressure difference.

3. The method according to claim 2, characterized in that, Neglecting the buoyancy, gravity, and pressure difference forces acting on the liquid flow particles in the gas-liquid separator, the dynamic equilibrium control equations for the liquid flow particles are obtained: In the formula, It is centrifugal force; For gas viscous resistance; It is an inertial force.

4. The method according to claim 3, characterized in that, Based on the circular motion of liquid flow particles in the gas-liquid separator, a centrifugal force equal in magnitude and opposite in direction to the centripetal force is introduced into a non-inertial frame of reference with the liquid flow particles as the reference frame. Applying Newton's laws, the centrifugal force is expressed as: In the formula, m For the mass of particles in the liquid phase flow; The average linear velocity of the rotating particles in the liquid phase flow; R Let be the radius of rotation of the liquid flow particles; simultaneously, according to the law of inertia, the inertial force acting on the liquid flow particles is determined as: In the formula, t The residence time of liquid phase particles in the separator; When liquid phase particles move in the separator, they are subjected to the viscous drag of gas. According to Stokes' law, the viscous drag of gas on the liquid phase particles is: In the formula, r Where the radius is the particle radius in the liquid phase flow; The viscosity coefficient of the gas; V The velocity of the liquid phase particles within the separator; Based on the dynamic equilibrium control equations of liquid flow particles, the differential control equations for the dynamic parameters of liquid flow particles are established as follows: ; The governing equations for the dynamic parameters of the liquid phase flow particles are obtained using an integral solution method: Ignoring the exponential terms, the dynamic parameter control equations for liquid phase particles within the separator are obtained as follows: .

5. The method according to claim 4, characterized in that, For a gas-liquid separator with a circular inlet structure, based on the relationship between flow rate and velocity: In the formula, Q The inlet volumetric flow rate; For the inlet velocity; A The cross-sectional area of ​​the circular inlet of the gas-liquid separator; d The diameter of the circular inlet; Using the radius of the separator cylinder as the average radius of the liquid phase particle rotation and the inlet velocity of the separator as the average linear velocity of the particle rotation, a simplified model is established. and The relationship is as follows: In the formula, Let the radius of the gas-liquid separator cylinder be ; Substitute into the equation In the process, the governing equations for the dynamic parameters of the liquid phase flow particles at the circular inlet are obtained as follows: .

6. The method according to claim 5, characterized in that, When the separator structure is fixed, dynamic parameters are adjusted in real time. V , Q To improve the separation efficiency of gas-liquid separators; When the separator structure is not fixed, it is based on the target dynamic parameters. V , Q Adjust the diameter of the circular inlet of the gas-liquid separator. d and cylinder radius This improves the separation efficiency of the gas-liquid separator.

7. The method according to claim 4, characterized in that, For a gas-liquid separator with a rectangular inlet structure, based on the relationship between flow rate and velocity: In the formula, w The width of the rectangular cross-section; h The height of the rectangular cross-section; Using the radius of the separator cylinder as the average radius of the liquid phase particle rotation and the inlet velocity of the separator as the average linear velocity of the particle rotation, a simplified model is established. and The relationship is as follows: In the formula, Let the radius of the gas-liquid separator cylinder be ; Substitute into the equation In the process, the governing equations for the dynamic parameters of the liquid phase flow particles at the rectangular inlet are obtained as follows: .

8. The method according to claim 7, characterized in that, When the separator structure is fixed, dynamic parameters are adjusted in real time. V , Q To improve the separation efficiency of gas-liquid separators; When the separator structure is not fixed, it is based on the target dynamic parameters. V , Q Adjust the cylinder radius of the gas-liquid separator Rectangular entrance height h and the width of the rectangular entrance w This ensures that the gas-liquid separator maintains high efficiency in gas-liquid separation.

9. The method according to claim 4, characterized in that, For a gas-liquid separator with a tapered inlet structure, considering the relationship between flow rate and velocity, according to the continuity equation: In the formula, The volumetric flow rate at the large-end inlet; The volumetric flow rate at the small-end inlet; The cross-sectional area of ​​the large-end inlet; The cross-sectional area of ​​the small-end inlet; For the large-end inlet velocity; The flow rate at the small-end inlet; The inlet diameter is the large end. The inlet diameter is at the small end. The governing equations for the dynamic parameters of the liquid phase flow particles at the tapered inlet are as follows: , .

10. The method according to claim 9, characterized in that, When the structure of the gas-liquid separator is fixed, dynamic parameters can be adjusted in real time. V , This ensures the gas-liquid separator maintains a highly efficient state of gas-liquid separation; when the separator structure is not fixed, the target dynamic parameters are used to achieve this. V , Adjust the cylinder radius of the gas-liquid separator Large end inlet diameter and the small-end inlet diameter This ensures that the gas-liquid separator maintains a state of high-efficiency gas-liquid separation.

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