Multiphase flow mixed transmission control method and multiphase flow mixed transmission device

Abstract

The present application provides a control method for multiphase flow mixing, which is used in a multiphase flow mixing device. The multiphase flow mixing device has a first tank body, a second tank body, and a reversing mechanism. The method includes the following steps: driving the reversing mechanism to operate so that liquid circulates back and forth between the first tank body and the second tank body to form a vacuum suction chamber in one of the first tank body and a compression discharge chamber in the other tank body; filling the tank body forming the compression discharge chamber with liquid; obtaining the current flow direction of the liquid between the first tank body and the second tank body; if the preset reversing condition is met, controlling the reversing mechanism to reverse according to the current flow direction to switch the flow direction of the liquid between the first tank body and the second tank body. The present application effectively improves the suction efficiency by filling the tank body forming the compression discharge chamber with liquid to eliminate the air gap during the reversing process, thereby improving the transportation efficiency of the multiphase flow mixing.

Description

Technical Field

[0001] The present application relates to the field of fluid transportation technology, and in particular to a method for controlling multiphase flow mixing and a multiphase flow mixing device. Background Art

[0002] Crude oil output is primarily a multiphase mixture of oil, water, and gas, also containing a small amount of sediment. Traditional oil and gas extraction and transportation from oilfields involves separating the oil, gas, and water, then transporting them separately using oil pumps, water pumps, and compressors. This process is complex, requires high investment, and is difficult to operate and maintain.

[0003] Multiphase mixed flow technology is a highly efficient and economical pumping technology developed in recent years and represents a growing trend in oilfield production and transportation technology both domestically and internationally. Multiphase flow transportation places very high demands on equipment stability, requiring long-term stable operation. Chinese patent CN109114433A discloses a multiphase mixed flow device. However, when this device switches direction, if some gas remains within the tank forming the compression discharge chamber, the device must wait until the gas within the tank drops below the suction pressure before it can draw in the medium. This severely impacts the suction efficiency of the suction tank, and thus the device's delivery efficiency. Summary of the Invention

[0004] The present application provides a multiphase flow mixed transmission control method and a multiphase flow mixed transmission device, aiming to solve the technical problem of low transmission efficiency of the existing multiphase flow mixed transmission control method.

[0005] In one aspect, the present application provides a method for controlling multiphase flow mixing, which is used for a multiphase flow mixing device, wherein the multiphase flow mixing device has a first tank body, a second tank body, and a reversing mechanism, wherein the reversing mechanism is respectively connected to the first tank body and the second tank body, and the method comprises the following steps:

[0006] driving the reversing mechanism to operate so that the liquid circulates back and forth between the first tank body and the second tank body to form a vacuum suction chamber in one of the first tank body and a compression discharge chamber in the other tank body;

[0007] Filling the tank forming the compression discharge cavity with liquid;

[0008] Acquire a current flow direction of the liquid between the first tank body and the second tank body;

[0009] If the preset reversing condition is met, the reversing mechanism is controlled to perform reversal according to the current flow direction to switch the flow direction of the liquid between the first tank body and the second tank body.

[0010] In some embodiments of the present application, the step of filling the tank body forming the compression discharge cavity with liquid includes:

[0011] Obtaining the current volume of liquid in the first tank and the second tank;

[0012] Whether a preset fluid replenishment condition is met is determined based on the current liquid volume in the first tank body and the second tank body. If the preset fluid replenishment condition is met, liquid is replenished into the first tank body and / or the second tank body.

[0013] In some embodiments of the present application, the step of determining whether the preset fluid replenishment condition is met based on the current liquid volumes in the first tank and the second tank includes:

[0014] Obtaining the current gas volume in the tank forming the compression discharge cavity;

[0015] Obtaining the current volume of liquid in the tank forming the vacuum suction chamber and the volume of liquid discharged to be pumped to the tank forming the compression discharge chamber when the preset reversing condition is reached;

[0016] If the drain volume is not higher than the current gas volume, the preset fluid replenishment condition is met.

[0017] In some embodiments of the present application, the step of determining whether the preset fluid replenishment condition is met based on the current liquid volumes in the first tank and the second tank includes:

[0018] Obtaining the sum V1 of the current liquid volumes in the first tank and the second tank;

[0019] Obtaining the sum V2 of the volumes of the first tank body and the second tank body;

[0020] If the ratio of V1 to V2 is lower than 0.65, the preset fluid rehydration condition is met.

[0021] In some embodiments of the present application, the multiphase flow mixed delivery device further includes a third tank body, and the third tank body is connected to the reversing mechanism;

[0022] The step of adding liquid to the first tank and / or the second tank comprises:

[0023] The liquid in the third tank is pumped to the tank in which the compression discharge chamber is formed.

[0024] In some embodiments of the present application, the control method further includes determining whether a preset commutation condition is met, and the step of determining whether the preset commutation condition is met includes:

[0025] Obtaining a preset liquid level height in the tank forming the vacuum suction chamber;

[0026] Acquiring the current liquid level in the tank forming the vacuum suction chamber;

[0027] If the current liquid level height is equal to the preset liquid level line height, the preset reversing condition is met.

[0028] Another aspect of the present application provides a multiphase flow mixing device, comprising:

[0029] A mixed transport mechanism, comprising a first tank body, a second tank body and a reversing mechanism;

[0030] The reversing mechanism drives the liquid in the first tank body and the second tank body to circulate back and forth, so that the first tank body and the second tank body alternately form a vacuum suction chamber and / or a compression discharge chamber to achieve continuous transportation of liquid, gas or a gas-liquid mixture; wherein, the reversing mechanism switches the flow direction of the liquid between the first tank body and the second tank body when the first tank body or the second tank body with the compression discharge chamber is filled with liquid and meets the preset reversing conditions.

[0031] In some embodiments of the present application, the multiphase flow mixed delivery device further includes a fluid replenishing mechanism, and the fluid replenishing mechanism is connected to the first tank body and / or the second tank body.

[0032] In some embodiments of the present application, the fluid replenishing mechanism includes a third tank body, and the third tank body is connected to the reversing mechanism.

[0033] In some embodiments of the present application, the fluid replenishing mechanism also includes an inlet manifold and a control valve arranged on the inlet manifold, the reversing mechanism includes a first power pump, the inlet manifold connects the third tank body and the inlet of the first power pump, and the outlet of the first power pump is connected to the first tank body or the second tank body.

[0034] In some embodiments of the present application, the fluid replenishing mechanism also includes an inlet manifold, a second power pump and a control valve. The second power pump and the control valve are arranged on the inlet manifold, and the inlet manifold is connected to the third tank body, the second power pump and the reversing mechanism.

[0035] In some embodiments of the present application, the multiphase flow mixed delivery device further includes an outlet manifold; the outlet manifold is connected to the first tank body, the second tank body, and the third tank body;

[0036] The third tank receives the materials discharged from the first tank and the second tank, and discharges the materials under increased pressure.

[0037] In some embodiments of the present application, the first tank body and the second tank body are both provided with a fluid inlet, and the multiphase fluid mixing device further includes an input structure, the input structure including an inlet manifold, and the fluid inlets on the first tank body and the second tank body are respectively connected to the inlet manifold.

[0038] In some embodiments of the present application, the multiphase flow mixing device further includes the liquid level sensor, which is used to collect the liquid level heights in the first tank body and the second tank body.

[0039] In some embodiments of the present application, the multiphase flow mixed transmission device further includes a control system;

[0040] The control system is electrically connected to the liquid level sensor and the reversing mechanism respectively. The control system receives the liquid level heights in the first tank body and the second tank body, and controls the reversing mechanism to switch the flow direction of the liquid between the first tank body and the second tank body based on the liquid level heights.

[0041] The present application provides a control method for multiphase flow mixing, which is used for a multiphase flow mixing device, wherein the multiphase flow mixing device has a first tank body, a second tank body and a reversing mechanism, and the reversing mechanism is connected to the first tank body and the second tank body respectively. The method includes the following steps: driving the reversing mechanism to make the liquid circulate back and forth between the first tank body and the second tank body to form a vacuum suction chamber in one of the first tank body and the second tank body, and a compression discharge chamber in the other; filling the tank body forming the compression discharge chamber with liquid; obtaining the current flow direction of the liquid between the first tank body and the second tank body; if the preset reversing condition is met, controlling the reversing mechanism to reverse according to the current flow direction to switch the flow direction of the liquid between the first tank body and the second tank body. Compared with the existing control method of multiphase flow mixed transportation, the method fills the tank body forming the compression discharge chamber with liquid, so that there is no gas in the tank body forming the compression discharge chamber. The tank body that is a compression discharge chamber before reversing becomes a vacuum suction chamber after reversing, that is, there is no residual compressed gas in the tank body forming the vacuum suction chamber, so there is no need to wait for the gas in the tank body forming the vacuum suction chamber to depressurize, thereby improving the suction efficiency of the suction tank and thus improving the transportation efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 This is a schematic diagram of the steps of a method for controlling multiphase mixed transport provided by an embodiment of the present application;

[0044] Figure 2 This is a schematic diagram of some steps of a method for controlling multiphase mixed flow provided in an embodiment of the present application;

[0045] Figure 3 This is a schematic diagram of some steps of a method for controlling multiphase mixed flow provided in an embodiment of the present application;

[0046] Figure 4 1 is a schematic structural diagram of an embodiment of a multiphase flow mixing device provided in an embodiment of the present application;

[0047] Figure 5 It is a structural schematic diagram of another embodiment of a multiphase flow mixing device provided in the embodiments of the present application. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0050] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to make and use the invention. In the following description, details are listed for the purpose of explanation. It should be understood that one of ordinary skill in the art will recognize that the invention can be practiced without these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

[0051] The embodiments of the present application provide a method for controlling multiphase flow mixing and a multiphase flow mixing device, which are described in detail below.

[0052] First, see Figure 1 , Figure 1 A method for controlling multiphase mixed flow provided in an embodiment of the present application is shown, which is used for a multiphase mixed flow device. The multiphase mixed flow device has a first tank body, a second tank body, and a reversing mechanism. The reversing mechanism is respectively connected to the first tank body and the second tank body. The method includes the following steps:

[0053] S1 drives the reversing mechanism to operate, so that the liquid circulates back and forth between the first tank body and the second tank body to form a vacuum suction chamber in one of the first tank body and a compression discharge chamber in the other tank body;

[0054] S2: filling the tank forming the compression discharge cavity with liquid;

[0055] S3 obtains the current flow direction of the liquid between the first tank body and the second tank body;

[0056] S4: If the preset reversing condition is met, the reversing mechanism is controlled to perform reversal according to the current flow direction to switch the flow direction of the liquid between the first tank body and the second tank body.

[0057] The multiphase flow mixing device provided in the embodiment of the present application has a first tank body 1 and a second tank body 2 for storing liquid. A reversing mechanism is provided between the first tank body 1 and the second tank body 2 to connect the two tank bodies. The structure of the reversing mechanism is described in detail below. When the reversing mechanism is in operation, it can drive the liquid to circulate back and forth between the first tank body 1 and the second tank body 2 so that one of the first tank body 1 and the second tank body 2 forms a vacuum suction chamber and the other forms a compression discharge chamber. The liquid circulates back and forth between the first tank body 1 and the second tank body 2. During a certain period of time, the liquid in the first tank body 1 flows into the second tank body 2, and its current flow direction is from the first tank body 1 to the second tank body 2. At this time, a vacuum suction chamber is formed in the first tank body 1 and a compression discharge chamber is formed in the second tank body 2. During another period of time, the liquid in the second tank body 2 flows into the first tank body 1, and its current flow direction is from the second tank body 2 to the first tank body 1. At this time, a compression compression chamber is formed in the first tank body 1 and a vacuum suction chamber is formed in the second tank body 2.

[0058] The tank body forming the compression discharge cavity is filled with liquid. When the first tank body 1 forms the compression discharge cavity, the first tank body 1 is filled with liquid; when the second tank body 2 forms the compression discharge cavity, the second tank body 2 is filled with liquid.

[0059] The current flow direction of the liquid between the first tank body 1 and the second tank body 2 is obtained, that is, whether the liquid currently flows from the first tank body 1 to the second tank body 2 or from the second tank body 2 to the first tank body 1 is obtained.

[0060] If the preset reversing condition is met, the reversing mechanism is controlled to perform reversing according to the current flow direction to switch the flow direction of the liquid between the first tank body and the second tank body. The preset reversing condition is a pre-set reversing condition, which can be the liquid level height of the liquid in the first tank body 1 and the second tank body 2, or the pressure value in the first tank body 1 and the second tank body 2. Switching the flow direction of the liquid between the first tank body and the second tank body means that if the current flow direction is from the first tank body 1 to the second tank body 2, then the flow direction will be switched to flow from the second tank body 2 to the first tank body 1; if the current flow direction is from the second tank body 2 to the first tank body 1, then the flow direction will be switched to flow from the first tank body 1 to the second tank body 2.

[0061] The present application fills a tank body with a compression discharge chamber with liquid, and controls the reversing mechanism to perform reversal when the preset reversing conditions are met. Compared with the existing multiphase flow mixing device, the present application can ensure that there is no gas in the tank body forming the compression discharge chamber before reversing. Therefore, after reversing, the compression discharge chamber is transformed into a vacuum suction chamber, and there is no need to wait for the gas in the tank body to depressurize, thereby improving the suction efficiency of the suction tank and thus improving the transportation efficiency of the device.

[0062] In some embodiments of the present application, the multiphase flow mixing device further includes a control system 7, which can obtain the liquid flow direction of the liquid between the first tank body 1 and the second tank body 2 by obtaining the volume change or liquid level change of the liquid in the first tank body 1 and the second tank body 2. In other embodiments of the present application, the control system 7 can obtain the liquid flow direction of the liquid between the first tank body 1 and the second tank body 2 by obtaining the pressure values ​​in the first tank body 1 and the second tank body 2. In other embodiments of the present application, the control system 7 can also obtain the liquid flow direction of the liquid between the first tank body 1 and the second tank body 2 by obtaining the opening and closing states of different channels in the reversing mechanism.

[0063] Furthermore, the reversing mechanism is electrically connected to the control system 7. A preset reversing condition is set in the control system 7. When the control system 7 determines that the preset reversing condition is met, the control system 7 controls the opening and closing of the valves on the pipelines in the reversing mechanism, thereby closing the channel corresponding to the current liquid flow direction and opening the channel corresponding to the reversing liquid flow direction, thereby reversing the reversing mechanism.

[0064] Furthermore, determining whether the preset reversing condition is met can be achieved by detecting whether the fluid parameters in the first tank body 1 and the second tank body 2 reach preset values.

[0065] In some embodiments of the present application, the step of filling the tank body forming the compression discharge chamber with liquid includes obtaining current liquid volumes in the first tank body and the second tank body, determining whether preset liquid replenishment conditions are met based on the current liquid volumes in the first tank body and the second tank body, and replenishing liquid into the first tank body and / or the second tank body if the preset liquid replenishment conditions are met.

[0066] In some embodiments of the present application, the step of determining whether a preset fluid replenishment condition is met based on the current liquid volume in the first tank body 1 and the second tank body 2 includes: obtaining the current gas volume in the tank body forming the compression discharge chamber; obtaining the current liquid volume in the tank body forming the vacuum suction chamber and the volume of liquid that will be pumped into the tank body forming the compression discharge chamber when the preset reversing condition is met; if the liquid volume is not greater than the current gas volume, the preset fluid replenishment condition is met. The current gas volume is the volume occupied by gas in the tank body forming the compression discharge chamber, i.e., the difference between the volume of the tank body and the volume of liquid within the tank body. The liquid volume that will be pumped into the tank body forming the compression discharge chamber when the preset reversing condition is met refers to the volume of liquid that is discharged from the tank body forming the vacuum suction chamber into the tank body forming the compression discharge chamber during the period from the current moment to the moment when the preset reversing condition is met. In some embodiments, the liquid volume can be calculated based on the amount of liquid drawn into the tank body forming the vacuum suction chamber and the drop in the liquid level within the tank body when the preset reversing condition is met.

[0067] In some embodiments of the present application, the step of judging whether the preset fluid replenishment condition is met based on the current liquid volume in the first tank body and the second tank body includes: obtaining the sum V1 of the current liquid volume in the first tank body and the second tank body; obtaining the sum V2 of the volume of the first tank body and the second tank body; if the ratio of V1 to V2 is lower than 0.65, the preset fluid replenishment condition is met. Furthermore, when the ratio of V1 to V2 is higher than 0.75, the fluid replenishment into the first tank body and the second tank body is stopped. It can be understood that setting the ratio of V1 to V2 between 0.65 and 0.75 is conducive to improving the conveying efficiency of the multiphase flow, and at the same time can ensure that the tank body forming the compression discharge chamber before the reversing mechanism is reversed can always be filled with liquid, further improving the conveying efficiency of the multiphase flow.

[0068] Furthermore, in some embodiments of the present application, whether the preset refilling condition is met can also be determined by obtaining the liquid level heights of the first tank body and the second tank body. It is understandable that after obtaining the liquid level heights and cross-sectional area-related parameters of the first tank body and the second tank body, the corresponding volume can be calculated based on the liquid level heights and cross-sectional areas to determine whether the preset refilling condition is met. One possible approach is to set the volume of the first tank body and the second tank body to be the same, and the first tank body and the second tank body to have a fixed cross-sectional area. By detecting the liquid level height H1 in the first tank body and the liquid level height H2 in the second tank body, if the sum of the heights of H1 and H2 is less than 1.3 times the height of the first tank body, it is determined that the refilling condition is met. After a period of refilling, the liquid level height in the first tank body is H3 and the liquid level in the second tank body is H4. If the sum of the heights of H3 and H4 is greater than 1.4 times the height of the first tank body, refilling the first tank body and / or the second tank body is stopped.

[0069] It can be understood that since the liquid in the first tank body 1 and the second tank body 2 is always flowing, the multiphase flow mixing device continues to inhale and discharge materials. When the volume of the inhaled liquid is less than the volume of the discharged liquid, the total volume of the liquid in the first tank body 1 and the second tank body 2 will decrease. By replenishing liquid to the first tank body 1 and / or the second tank body 2, it is possible to effectively avoid the situation where the tank body with a vacuum suction chamber meets the preset reversing conditions but the compression discharge chamber is still not full of liquid, thereby improving the conveying efficiency.

[0070] Furthermore, the multiphase flow mixing device also includes a third tank body, which is connected to the reversing mechanism; the step of replenishing liquid to the first tank body and / or the second tank body includes: pumping the liquid in the third tank body to the tank body forming the compression discharge cavity.

[0071] Furthermore, the control method also includes determining whether a preset reversing condition is met, and the step of determining whether the preset reversing condition is met includes: obtaining a preset liquid level line height in the tank body forming the vacuum suction chamber; obtaining a current liquid level height in the tank body forming the vacuum suction chamber; if the current liquid level height is equal to the preset liquid level line height, the preset reversing condition is met.

[0072] See also Figure 4 , Figure 4 This is a schematic diagram of a multiphase flow mixing device 10 for achieving mixed transportation of a multiphase mixture provided by the present application. Figure 4Further explanation of this application. It should be noted that the multiphase flow mixing device 10 shown in this application is only used as a partial example to illustrate the multiphase flow mixing control method in this application. The multiphase flow mixing device used to implement the multiphase flow mixing control method in this application is not limited to the structure of the multiphase flow mixing device 10 provided in this application.

[0073] like Figure 4 As shown, the present application provides a multiphase flow mixing device, comprising: a mixing mechanism, the mixing mechanism comprising a first tank body 1, a second tank body 2 and a reversing mechanism; the reversing mechanism drives the liquid in the first tank body 1 and the second tank body 2 to circulate back and forth, so that the first tank body 1 and the second tank body 2 alternately form a vacuum suction chamber and / or a compression discharge chamber to achieve continuous transportation of liquid, gas or a gas-liquid mixture; wherein the reversing mechanism switches the flow direction of the liquid between the first tank body and the second tank body when the first tank body or the second tank body with the compression discharge chamber is filled with liquid and meets the preset reversing conditions.

[0074] It is understandable that when the first tank body 1 forms a compression discharge chamber, the first tank body 1 is filled with liquid; when the second tank body 2 forms a compression discharge chamber, the second tank body 2 is filled with liquid. The present application fills the tank body with a compression discharge chamber with liquid, and controls the reversing mechanism to perform reversal when the preset reversing condition is reached. Compared with the existing multiphase flow mixing device, the present application can ensure that there is no gas in the tank body forming the compression discharge chamber before reversing. The tank body that was a compression discharge chamber before reversing becomes a vacuum suction chamber after reversing, that is, there is no residual compressed gas in the tank body forming the vacuum suction chamber, so there is no need to wait for the gas in the tank body forming the vacuum suction chamber to depressurize, thereby improving the suction efficiency of the suction tank and thus improving the conveying efficiency of the device.

[0075] It can be understood that the first tank body 1 and the second tank body 2 are containers for storing multiphase fluids, wherein the multiphase fluid can refer to a mixture composed of oil, natural gas, water, etc. The first tank body 1 and the second tank body 2 are mainly used to alternately form a vacuum suction chamber and / or a compression discharge chamber when the liquid in the first tank body 1 and the second tank body 2 circulates back and forth. The tank body forming the vacuum suction chamber absorbs the multiphase fluid through negative pressure, and the tank body forming the true compression discharge chamber discharges the gas through high pressure. At the same time, as the liquid level rises, the liquid is discharged again, ultimately achieving continuous extraction and transportation of liquid, gas or gas-liquid mixture. For example, when the first tank body 1 transports liquid to the second tank body 2, the first tank body 1 absorbs the multiphase fluid through negative pressure due to the drop in liquid level and the pressure of the gas space decreases. The second tank body 2 absorbs the multiphase fluid through negative pressure due to the rise in liquid level and the pressure of the compressed gas space increases. The gas is discharged through high pressure. At the same time, as the liquid level rises, the liquid in the second tank body 2 overflows and is discharged.

[0076] The reversing mechanism is mainly used to drive the liquid in the first tank body 1 and the second tank body 2 to circulate back and forth, thereby causing the first tank body 1 and the second tank body 2 to alternately have a vacuum suction chamber and / or a compression discharge chamber, and to absorb the multiphase flow through the vacuum suction chamber, and to discharge the gas and liquid through the compression discharge chamber. Specifically, the reversing mechanism controls the liquid in the first tank body 1 to flow into the second tank body 2, and the volume of the liquid in the first tank body 1 decreases, thereby forming a vacuum suction chamber in the first tank body 1; at the same time, as the liquid in the first tank body 1 is transported to the second tank body 2, the volume of the liquid in the second tank body 2 increases accordingly, thereby forming a compression discharge chamber in the second tank body 2. Similarly, when the reversing mechanism controls the liquid in the second tank body 2 to flow into the first tank body 1, a vacuum suction chamber can be formed in the second tank body 2, and a compression discharge chamber can be formed in the first tank body 1, which will not be repeated here.

[0077] In some embodiments of the present application, the reversing mechanism includes a first power pump 8 and a pipeline group 14, and the pipeline group 14 is provided with a plurality of control valves 15. The pipeline group 14 connects the first power pump 8, the second tank body 2, and the first tank body 1. By controlling the opening and closing of the corresponding control valves 15, the pipeline group 14 forms a channel for liquid to flow from the first tank body 1 to the second tank body 2, or a channel for liquid to flow from the second tank body 2 to the first tank body 1. The first power pump 8 in the reversing mechanism can drive liquid to flow from the first tank body 1 to the second tank body 2, or drive liquid to flow from the second tank body 2 to the first tank body 1, so that one of the first tank body 1 and the second tank body 2 forms a vacuum suction chamber, and the other forms a compression discharge chamber.

[0078] In some embodiments of the present application, the multiphase flow mixing device further includes a control system 7, which is electrically connected to the reversing mechanism via a data line. The control system 7 can obtain the flow direction of the liquid between the first tank body 1 and the second tank body 2 through the electrical connection with the reversing mechanism. A preset reversing condition is set in the control system 7. If the liquid flows from the first tank body 1 to the second tank body 2, when the control system determines that the preset reversing condition has been reached, the control system 7 controls the reversing mechanism to reverse, close the channel for the liquid to flow from the first tank body 1 to the second tank body 2, and open the channel for the liquid to flow from the second tank body 2 to the first tank body 1. If the liquid flows from the second tank body 2 to the first tank body 1, when the control system determines that the preset reversing condition has been reached, the control system controls the reversing mechanism to reverse, open the channel for the liquid to flow from the first tank body 1 to the second tank body 2, and close the channel for the liquid to flow from the second tank body 2 to the first tank body 1.

[0079] In some embodiments of the present application, the multiphase flow mixing device further comprises a fluid replenishment mechanism, the fluid replenishment mechanism being in communication with the first tank body and / or the second tank body. If a preset fluid replenishment condition is met, the fluid replenishment mechanism provides circulating fluid to fill the first tank body 1 or the second tank body 2 with the compression discharge cavity after the compression discharge cavity is formed in the first tank body 1 or the second tank body 2.

[0080] In this embodiment of the present application, when the first tank body 1 forms a compression discharge chamber, the liquid in the liquid replenishing mechanism flows into the first tank body 1; when the second tank body 2 forms a compression discharge chamber, the liquid in the liquid replenishing mechanism flows into the second tank body 2. When the tank body with the compression discharge chamber is filled with liquid and the other tank body forms a vacuum suction chamber and its liquid level reaches the preset liquid level line, the reversing mechanism reverses direction.

[0081] When the liquid level in the second tank body 2 forming the vacuum suction chamber reaches a preset liquid level height, the reversing mechanism reverses, and the first tank body 1 is transformed from a compression discharge chamber to a vacuum suction chamber. The liquid in the first tank body 1 is discharged into the second tank body 2, the liquid level in the first tank body 1 drops, and the liquid level in the second tank body 2 rises. When the second tank body 2 forms a compression discharge chamber, the first control valve 9 is connected to the inlet manifold 6, and the liquid enters the second tank body 2 through the third tank body 3, the inlet manifold 6 and the first power pump 8, so that the second tank body 2 is filled with liquid, eliminating the compression clearance in the second tank body 2. After the compression clearance is eliminated, the direction is reversed, and the compression discharge chamber is transformed into a vacuum suction chamber. There is no need to wait for the gas in the tank body to depressurize, which improves the suction efficiency of the suction tank and thus improves the conveying efficiency of the device.

[0082] When the liquid level in the first tank body 1 forming the vacuum suction chamber reaches a preset liquid level height, the reversing mechanism reverses, and the second tank body 2 is transformed from a compression discharge chamber into a vacuum suction chamber. The liquid in the second tank body 2 is discharged into the first tank body 1, the liquid level in the second tank body 2 drops, and the liquid level in the first tank body 1 rises, and the above process is repeated.

[0083] The detection mechanism transmits the detection data to the control system 7, which sets a preset fluid replenishment condition in the control system 7. When the current liquid volume in the first tank 1 reaches the preset fluid replenishment condition, the fluid replenishment mechanism is controlled to replenish liquid into the first tank 1. When the current liquid volume in the second tank 2 reaches the preset fluid replenishment condition, the fluid replenishment mechanism is controlled to replenish liquid into the second tank 2.

[0084] Furthermore, the fluid replenishing mechanism includes a third tank body 3, and the third tank body 3 is communicated with the reversing mechanism.

[0085] Furthermore, the fluid replenishment mechanism includes an inlet manifold 6 and a first control valve 9 provided on the inlet manifold 6. The reversing mechanism includes a first power pump 8. The inlet manifold 6 connects the third tank body 3 with the inlet of the first power pump 8, and the outlet of the first power pump 8 connects with the first tank body 1 or the second tank body 2. The first control valve 9 is provided on the inlet manifold 6 and is used to control the conduction of the inlet manifold 6. By obtaining the current liquid volume in the first tank body 1 and the second tank body 2; judging whether the preset fluid replenishment condition is met based on the current liquid volume in the first tank body 1 and the second tank body 2, and controlling the fluid replenishment mechanism to replenish liquid to the first tank body 1 and / or the second tank body 2 that have met the preset fluid replenishment condition, it can be ensured that the tank body formed with the compression discharge chamber does not contain gas.

[0086] One possible implementation involves activating the first power pump 8 in the reversing mechanism, which connects the first tank 1 and the second tank 2 via a forward flow pipeline set and a reverse flow pipeline set. The reversing mechanism drives the liquid to circulate back and forth between the first tank 1 and the second tank 2, forming a vacuum suction chamber in one of the first tank 1 and the second tank 2 and a compression discharge chamber in the other, with the fluid flow direction constantly switching.

[0087] When the first tank body 1 forms a vacuum suction chamber and the second tank body 2 forms a compression discharge chamber, the forward flow pipeline group is in an open state and the reverse flow pipeline group is in a closed state, and the current liquid flow direction is from the first tank body 1 to the second tank body 2. Conversely, the current liquid flow direction is from the second tank body 2 to the first tank body 1. The multiple valves on the forward flow pipeline group and the reverse flow pipeline group are used to control the opening or closing of the forward flow pipeline group and the reverse flow pipeline group.

[0088] Furthermore, the multiphase flow mixing device further includes an outlet manifold 12, which connects the first tank 1, the second tank 2, and the third tank 3. The third tank 3 receives material discharged from the first tank 1 and the second tank 2 and discharges the material under pressure. The second control valve 11 is disposed on the outlet manifold 12 and is used to control the flow of the outlet manifold 12.

[0089] The control system 7 can detect the open and closed states of the forward flow pipeline group and the reverse flow pipeline group, and can determine the current flow direction of the liquid based on the open and closed states of the pipeline groups. The open and closed states of the forward flow pipeline group and the reverse flow pipeline group can be obtained by detecting the open and closed states of the valves installed on the different pipeline groups. If the forward flow pipeline group is currently in the open state and the reverse flow pipeline group is in the closed state, the current liquid flow direction is from the first tank body 1 to the second tank body 2; if the forward flow pipeline group is currently in the closed state and the reverse flow pipeline group is in the open state, the current liquid flow direction is from the second tank body 2 to the first tank body 1.

[0090] By detecting the open and closed states of the forward flow pipeline group and the reverse flow pipeline group, the flow direction of the liquid between the first tank body 1 and the second tank body 2 can be easily determined.

[0091] In some embodiments of the present application, the first tank body 1 forms a compression discharge chamber. If the refilling conditions are met, the control system 7 controls the opening of the first control valve 9, and the first power pump 8 pumps the liquid in the third tank body 3 into the first tank body 1 until the first tank body 1 is filled. At this time, there is no gas in the first tank body 1. After the reversing mechanism switches, the first tank body 1 is transformed from a compression discharge chamber into a vacuum suction chamber. This eliminates the need to wait for the gas in the tank body to expand and depressurize below the suction pressure, thereby improving the suction efficiency of the mechanism.

[0092] In some embodiments of the present application, a preset liquid level is set on the first tank body 1 and the second tank body 2. This level is the level at which the reversing mechanism switches direction when the liquid level reaches this level after one of the first tank body 1 or the second tank body 2 forms a compression discharge chamber and the other forms a vacuum suction chamber. Detection elements, such as liquid level gauges, provided on the first tank body 1 and the second tank body 2 detect the current liquid level in the tank body forming the vacuum suction chamber.

[0093] In some embodiments of the present application, a first circulating liquid inlet and a first circulating liquid outlet are provided on the side wall of the first tank body 1, and the height difference between the first circulating liquid inlet and the first circulating liquid outlet is greater than zero. That is, the first circulating liquid inlet is located above the first circulating liquid outlet, thereby reducing resistance during liquid inlet and facilitating liquid discharge. It is also understood that a second circulating liquid inlet and a second circulating liquid outlet are provided on the upper portion of the second tank body 2, and the height difference between the second circulating liquid inlet and the first circulating liquid outlet is greater than zero.

[0094] See also Figure 5In another embodiment of the present application, the fluid replenishing mechanism includes an inlet manifold 6, a third tank body 3, a first control valve 9 and a second power pump 13; the inlet manifold 6 connects the first tank body 1, the second tank body 2 and the third tank body 3; the second power pump 13 and the first control valve 9 are arranged on the inlet manifold 6, the first control valve 9 is used to control the conduction of the inlet manifold 6, and the second power pump 13 is used to drive the liquid from the third tank body 3 to flow into the first tank body 1 or from the third tank body 3 to flow into the second tank body 2.

[0095] Furthermore, the first control valve 9 is a two-way valve arranged on the inlet manifold 6; wherein, the two-way valve connects the inlet manifold 6 and the first power pump 8, and the first power pump 8 drives the liquid from the third tank body 3 to flow into the first tank body 1 or from the third tank body 3 to flow into the second tank body 2.

[0096] Specifically, when the first tank body 1 forms a compression discharge cavity, the first control valve 9 is connected to the inlet manifold 6, and the liquid enters the first tank body 1 through the third tank body 3, the inlet manifold 6 and the second power pump 13, so that the first tank body 1 is filled with liquid, eliminating the compression gap in the first tank body 1.

[0097] When the liquid level in the second tank body 2 forming the vacuum suction chamber reaches a preset liquid level height, the reversing mechanism reverses, and the first tank body 1 is transformed from a compression discharge chamber into a vacuum suction chamber. The liquid in the first tank body 1 is discharged into the second tank body 2, the liquid level in the first tank body 1 drops, and the liquid level in the second tank body 2 rises. When the second tank body 2 forms a compression discharge chamber, the first control valve 9 is connected to the inlet manifold 6, and the liquid enters the second tank body 2 through the third tank body 3, the inlet manifold 6 and the second power pump 13, so that the second tank body 2 is filled with liquid, eliminating the compression gap in the second tank body 2.

[0098] When the liquid level in the first tank body 1, which forms the vacuum suction chamber, reaches a preset level, the reversing mechanism reverses direction, transforming the second tank body 2 from a compression discharge chamber into a vacuum suction chamber. The liquid in the second tank body 2 is discharged into the first tank body 1, causing the liquid level in the second tank body 2 to drop while the liquid level in the first tank body 1 to rise. This process is repeated, achieving continuous multiphase flow conveying. After the compression clearance is eliminated, the reversal is performed, transforming the compression discharge chamber into a vacuum suction chamber. This eliminates the need to wait for the gas in the tank body to depressurize, improving the suction efficiency of the suction tank and, consequently, the conveying efficiency of the device.

[0099] Further, the first control valve 9 can be a three-way valve arranged on the second pipeline; wherein, the three-way valve connects the first tank body 1 and the second pipeline and closes the second tank body 2 and the second pipeline, and the second power pump 13 drives the liquid to flow along the third tank body 3 through the second pipeline, the second power pump 13 and the first pipeline in sequence into the first tank body 1; or, the three-way valve connects the second tank body 2 and the second pipeline and closes the first tank body 1 and the second pipeline, and the second power pump 13 drives the liquid to flow along the third tank body 3 through the second pipeline, the second power pump 13 and the first pipeline in sequence into the second tank body 2.

[0100] In some embodiments of the present application, the first control valve 9 can also be a pair of two-way valves arranged on the second pipeline; wherein, one of the two-way valves connects the first tank body 1 and the second pipeline and the other two-way valve closes the second tank body 2 and the second pipeline, and the second power pump 13 drives the liquid to flow along the third tank body 3 through the second pipeline, the second power pump 13 and the first pipeline in sequence into the first tank body 1; or, one of the two-way valves connects the second tank body 2 and the second pipeline and the other two-way valve closes the first tank body 1 and the second pipeline, and the second power pump 13 drives the liquid to flow along the third tank body 3 through the second pipeline, the second power pump 13 and the first pipeline in sequence into the second tank body 2.

[0101] In some embodiments of the present application, the fluid replenishment mechanism further includes an outlet manifold 12 and a second control valve 11; the outlet manifold 12 connects the first tank body 1, the second tank body 2, and the third tank body 3. The third tank body 3 receives the material discharged from the first tank body 1 and the second tank body 2, and discharges the material under increased pressure.

[0102] In some embodiments of the present application, the multiphase flow mixing device further comprises a liquid level sensor, which is used to collect the liquid level heights in the first tank body and the second tank body. Specifically, the first tank body 1 is provided with a first liquid level gauge 1-10, and the second tank body 2 is provided with a second liquid level gauge 2-10. The first liquid level gauge 1-10 and the second liquid level sensor collect the liquid level heights in the first tank body 1 and the second tank body 2. The control system 7 is respectively electrically connected to the liquid level sensor, the first liquid level gauge 2-10, and the reversing mechanism, and controls the reversing of the reversing mechanism.

[0103] It is understandable that providing the control system 7 and the first liquid level gauges 1-10 and the first liquid level gauges 2-10 in the multiphase flow mixing device is conducive to improving the degree of automation of the multiphase flow mixing device. Of course, in other embodiments of the present application, the multiphase flow mixing device may also include a pressure sensor (not shown in the figure), which collects the pressure values ​​in the first tank body 1 and the second tank body 2, which is conducive to improving the safety of the multiphase flow mixing device.

[0104] Specifically, the control system 7 is connected to the first power pump 8, the second power pump 13, the first control valve 9, and the second control valve 11 through control lines respectively, and controls the opening or closing of the first control valve 9 and the second control valve 11 to control the conduction or closing of the first tank body 1, the second tank body 2 and the third tank body 3. The liquid in the third tank body 3 is pumped into the first tank body 1 or the second tank body 2 by controlling the opening and closing of the first power pump 8 and the second power pump 13.

[0105] In some embodiments of the present application, a fluid inlet and a fluid outlet are provided on both the first tank body 1 and the second tank body 2. Furthermore, the multiphase fluid mixing device further comprises an input structure and an output structure, wherein the input structure comprises an input manifold 4, and the fluid inlets on the first tank body 1 and the second tank body 2 are connected to the input manifold 4 via a first inlet one-way valve and a second inlet one-way valve, respectively; the output structure comprises an output manifold 5, and the fluid outlets on the first tank body 1 and the second tank body 2 are connected to the output manifold 5 via a first outlet one-way valve and a second outlet one-way valve, respectively. Of course, in other embodiments of the present application, only one opening may be provided on the upper portion of the first tank body 1 and the upper portion of the second tank body 2 for fluid to flow into or out of the corresponding tank body, and these openings may be connected to the input structure and the output structure respectively via a two-way valve, which is not limited here.

[0106] The above is a detailed introduction to a multiphase flow mixing method and device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A method for controlling multiphase mixed flow, characterized in that: For a multiphase flow mixing device, the multiphase flow mixing device comprises a first tank body, a second tank body and a reversing mechanism, the reversing mechanism being connected to the first tank body and the second tank body respectively, the method comprising the following steps: driving the reversing mechanism to operate so that the liquid circulates back and forth between the first tank body and the second tank body to form a vacuum suction chamber in one of the first tank body and a compression discharge chamber in the other tank body; Filling the tank forming the compression discharge cavity with liquid; Acquire a current flow direction of the liquid between the first tank body and the second tank body; If a preset reversing condition is met, the reversing mechanism is controlled to perform reversal according to the current flow direction to switch the flow direction of the liquid between the first tank body and the second tank body; The step of filling the tank body forming the compression discharge cavity with liquid comprises: Obtaining the current volume of liquid in the first tank and the second tank; determining whether a preset fluid replenishment condition is met based on the current liquid volume in the first tank and the second tank, and replenishing liquid into the first tank and / or the second tank if the preset fluid replenishment condition is met; The step of determining whether the preset fluid replenishment conditions are met based on the current liquid volumes in the first tank and the second tank includes: Obtaining the sum V1 of the current liquid volumes in the first tank and the second tank; Obtaining the sum V2 of the volumes of the first tank body and the second tank body; If the ratio of V1 to V2 is lower than 0.65, the preset fluid infusion condition is met; when the ratio of V1 to V2 is higher than 0.75, the fluid infusion is stopped.

2. The control method according to claim 1, characterized in that: The multiphase flow mixed delivery device further includes a third tank body, and the third tank body is connected to the reversing mechanism; The step of adding liquid to the first tank and / or the second tank comprises: The liquid in the third tank is pumped to the tank in which the compression discharge chamber is formed.

3. The control method according to claim 1, characterized in that: The control method further includes determining whether a preset commutation condition is met, wherein the step of determining whether the preset commutation condition is met includes: Obtaining a preset liquid level height in the tank forming the vacuum suction chamber; Acquiring the current liquid level in the tank forming the vacuum suction chamber; If the current liquid level height is equal to the preset liquid level line height, the preset reversing condition is met.

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