CN114278863A - Multiphase flow conveying device - Google Patents

Abstract

The application provides a multiphase flow conveying device, which comprises a first tank body; a second tank; the reversing mechanism is connected with the first tank body and the second tank body and is used for driving the liquid in the first tank body and the second tank body to circulate in a reciprocating manner, so that the first tank body and the second tank body alternately form a vacuum suction cavity and/or a compression discharge cavity, and the continuous mixing and conveying of the liquid, the gas or the gas-liquid mixture is realized; the output mechanism comprises a first pipeline for conveying gas, a second pipeline for conveying liquid and a control valve for controlling the first pipeline and the second pipeline to be communicated and closed. The liquid in the first tank body and the liquid in the second tank body are driven to circulate in a reciprocating mode through the reversing mechanism, so that the first tank body and the second tank body alternately form a vacuum suction cavity and/or a compression discharge cavity, the tank body in the compression discharge cavity discharges gas into a first pipeline firstly, and when liquid is filled, the gas overflows and is discharged into a second pipeline, and separation and conveying of multiphase flow are achieved.

Description

Multiphase flow conveying device

Technical Field

The application relates to the technical field of fluid conveying, in particular to a multiphase flow conveying device.

Background

At present, oil and gas mainly produced in an oil field comprise multiphase flows of oil, natural gas, water, silt and the like mixed in liquid, and the produced multiphase mixture needs to be conveyed to a gas-liquid separator to be separated and then conveyed by a pump or a compressor.

However, in the process of separating the multiphase mixture, the gas will carry part of liquid molecules into the compressor, the compressor is easily damaged by liquid impact after the liquid molecules are accumulated, and meanwhile, due to the incompressibility of the liquid, the compressor cannot fully exert benefits due to the occupied space, and further the efficiency of the compressor is reduced. Therefore, how to avoid the compressor damage phenomenon in the multi-phase flow separation process becomes the direction of effort for those skilled in the art.

Disclosure of Invention

The application provides a multiphase flow conveying device, and aims to solve the technical problem that a compressor is damaged in the existing multiphase mixture separation process.

In a first aspect, the present application provides a multiphase flow delivery device comprising:

a first tank;

a second tank;

the reversing mechanism is connected with the first tank body and the second tank body and is used for driving the liquid in the first tank body and the second tank body to circulate in a reciprocating manner, so that the first tank body and the second tank body alternately form a vacuum suction cavity and/or a compression discharge cavity, and the continuous mixing and conveying of the liquid, the gas or the gas-liquid mixture is realized;

the output mechanism comprises a first pipeline for conveying gas, a second pipeline for conveying liquid and a control valve for controlling the first pipeline and the second pipeline to be communicated and closed;

when the control valve is used for conveying gas, the first pipeline is communicated and the second pipeline is closed, and the first pipeline is communicated with the first tank body and the second tank body; the control valve conducts the second pipeline and closes the first pipeline when conveying liquid, and the second pipeline is communicated with the first tank body and the second tank body.

In some embodiments, the first line is provided with a first inlet communicating with the first and second tanks, respectively, and a first outlet remote from the first inlet and adjacent to the control valve;

preferably, the second line is provided with a second inlet communicating with the first and second tanks, respectively, and a second outlet remote from the second inlet and adjacent to the control valve.

In some embodiments, a first line connects the first tank and the second tank, and a second line connects the first line to form a bypass passage.

In some embodiments, the control valve includes a three-way valve disposed at a junction of the second line and the first line, and two-way valves disposed at junctions of the first line and the first tank and the second tank, respectively.

In some embodiments, the control valve comprises four two-way valves, two of which are disposed at the junction of the first line and the first and second tanks, respectively, and two of which are disposed at the first and second outlets, respectively.

In some embodiments, the first line is connected to the first tank and the second tank, and the second line is connected to the first tank and the second tank.

In some embodiments, the control valve comprises four two-way valves, two of which are disposed at the junction of the first pipeline and the first tank and the second tank, respectively, and two of which are disposed at the junction of the second pipeline and the first tank and the second tank, respectively.

In some embodiments, the output mechanism further comprises a detector for feeding back information on the state of the fluid flowing through the output mechanism.

In some embodiments, the detector comprises a first liquid level meter disposed at the first tank for detecting a height of liquid in the first tank, and a second liquid level meter disposed at the second tank for detecting a height of liquid in the second tank.

In some embodiments, the device further comprises an input mechanism, wherein the input mechanism comprises a third pipeline and a second control valve, the third pipeline is communicated with the first tank body and the second tank body, and the second control valve is used for controlling the conduction or the closing of the first tank body and the second tank body of the third pipeline.

In a second aspect, the present application provides a multiphase flow delivery system, which includes a controller, a bus, and the multiphase flow delivery device described in the first aspect, wherein the controller is connected to the multiphase flow delivery device through the bus.

The liquid in the first tank body and the liquid in the second tank body are driven to circulate in a reciprocating mode through the reversing mechanism, the first tank body and the second tank body are enabled to alternately form a vacuum suction cavity and/or a compression discharge cavity, the tank body in the vacuum suction cavity sucks multiphase mixture, the tank body in the compression discharge cavity discharges gas into a first pipeline, the gas overflows into a second pipeline when the liquid is full, separation and conveying of multiphase flow are achieved, only the multiphase flow is driven to be separated through exchange of the liquid in the whole separation and conveying process, and the gas and the liquid are not required to be separated and extracted independently through a compressor or a pump, so that the phenomenon that the gas carries partial liquid molecules into the compressor to be damaged is avoided, and meanwhile the efficiency of the compressor is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a multiphase flow delivery device provided in an embodiment of the present application;

FIG. 2 is another schematic view of a reversing mechanism provided in an embodiment of the present application;

FIG. 3 is another schematic view of a reversing mechanism provided in an embodiment of the present application;

FIG. 4 is a schematic view of an output mechanism provided in embodiments of the present application;

FIG. 5 is another schematic view of an output mechanism provided in an embodiment of the present application;

FIG. 6 is another schematic view of an output mechanism provided in an embodiment of the present application;

FIG. 7 is another schematic view of an output mechanism provided in an embodiment of the present application;

FIG. 8 is another schematic view of an output mechanism provided in an embodiment of the present application;

fig. 9 is a schematic view of another structure of the multiphase flow transportation device provided in the embodiment of the present application.

The system comprises a first tank body 10, a second tank body 20, a reversing mechanism 30, a connecting pipeline 31, a first sub-pipeline 311, a second sub-pipeline 312, a third sub-pipeline 313, a power pump 32, an output mechanism 40, a first pipeline 41, a first inlet 411, a first outlet 412, a second pipeline 42, a second inlet 421, a second outlet 422, a control valve 43, an input mechanism 50, a third pipeline 51 and a second control valve 52.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the invention. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and processes are not shown in detail to avoid obscuring the description of the invention with unnecessary detail. Thus, 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.

The embodiments of the present application provide a multiphase flow delivery device and system, which are described in detail below.

First, referring to fig. 1, fig. 1 shows a schematic structural diagram of a multiphase flow transportation device provided by an embodiment of the present application, where the multiphase flow transportation device includes:

a first tank 10 and a second tank 20;

the reversing mechanism 30 is connected with the first tank body 10 and the second tank body 20, and is used for driving the liquid in the first tank body 10 and the liquid in the second tank body 20 to circulate in a reciprocating manner, so that the first tank body 10 and the second tank body 20 alternately form a vacuum suction cavity and/or a compression discharge cavity, and continuous mixing and conveying of liquid, gas or a gas-liquid mixture are realized;

an output mechanism 40, the output mechanism 40 comprising a first pipeline 41 for conveying gas, a second pipeline 42 for conveying liquid, and a control valve 43 for controlling the first pipeline 41 and the second pipeline 42 to be opened and closed;

wherein, the control valve 43 conducts the first pipeline 41 and closes the second pipeline 42 when delivering gas, and the first pipeline 41 is communicated with the first tank 10 and the second tank 20; the control valve 43 opens the second line 42 and closes the first line 41 when the liquid is transferred, and the second line 42 connects the first tank 10 and the second tank 20.

The first and second tanks 10 and 20 refer to containers for storing multiphase mixtures, wherein the multiphase mixtures may refer to mixtures including oil, natural gas, water, and the like. The first tank 10 and the second tank 20 are mainly used for alternately forming a vacuum suction cavity and/or a compression discharge cavity when liquid in the first tank 10 and the second tank 20 circulates in a reciprocating manner, the tank forming the vacuum suction cavity sucks a multiphase mixture through a negative pressure effect, the tank forming the vacuum compression discharge cavity discharges gas through a high pressure effect, and simultaneously discharges the liquid along with the rise of the liquid level, so that the continuous mixing, extraction, separation and conveying of the liquid, the gas or the gas-liquid mixture are finally realized. Illustratively, when the first tank 10 delivers liquid to the second tank 20, the first tank 10 will lower the gas space expansion pressure due to the liquid level drop, drawing the multiphase mixture by negative pressure, the second tank 20 will raise the compressed gas space pressure due to the liquid level rise, venting the gas by high pressure, and simultaneously venting the liquid overflow of the second tank 20 as the liquid level rises.

The reversing mechanism 30 is mainly used for driving the liquid in the first tank body 10 and the second tank body 20 to circulate back and forth, so that the first tank body 10 and the second tank body 20 alternately have a vacuum suction cavity and/or a compression discharge cavity, multiphase flow is sucked through the vacuum suction cavity, and gas and liquid are discharged through the compression discharge cavity. Specifically, the reversing mechanism 30 may include a power pump 32 and a connecting line 31, wherein the power pump 32 serves as a power source for driving the liquid in the first tank 10 and the second tank 20 to circulate back and forth, and the connecting line 31 serves as a passage for the liquid in the first tank 10 and the second tank 20 to circulate back and forth, and generally, the connecting line 31 may be connected to the bottoms of the first tank 10 and the second tank 20 so as to pump the liquid at the bottoms of the first tank 10 and the second tank 20 through the power pump 32, and it is understood that the connecting line 31 may also be connected to other positions of the first tank 10 and the second tank 20.

The output mechanism 40 is used for dividing the gas discharged from the first tank 10 and the second tank 20 and the liquid at the overflow, and specifically, the output mechanism 40 comprises a first pipeline 41 for conveying the gas, a second pipeline 42 for conveying the liquid and a control valve 43 for controlling the first pipeline 41 and the second pipeline 42 to be opened and closed, wherein the first pipeline 41 is communicated with the first tank 10 and the second tank 20, the second pipeline 42 is communicated with the first tank 10 and the second tank 20, when delivering gas, the control valve 43 opens the first pipeline 41 and closes the second pipeline 42, when delivering liquid, the control valve 43 opens the second pipeline 42 and closes the first pipeline 41 when delivering liquid, the gas and the liquid discharged from the first tank 10 and the second tank 20 are divided by the gas supplied through the first pipeline 41 and the liquid supplied through the second pipeline 42, thereby achieving the purpose of gas-liquid separation and transportation of the multiphase mixture.

When the device works, the reversing mechanism 30 drives the liquid in the first tank body 10 and the liquid in the second tank body 20 to circulate back and forth, so that the first tank body 10 and the second tank body 20 alternately form a vacuum suction cavity and/or a compression discharge cavity, wherein the tank body in the vacuum suction cavity sucks in a multiphase mixture, the tank body in the compression discharge cavity discharges gas firstly, the control valve 43 conducts the first pipeline 41 and closes the second pipeline 42 at the moment, and the tank body in the compression discharge cavity discharges the gas into the first pipeline 41; when the liquid in the tank body of the compression discharge cavity is filled and overflows, the control valve 43 conducts the second pipeline 42 and closes the first pipeline 41 at the moment, and the overflowing liquid is discharged into the second pipeline 42, so that the aim of separating and conveying multiphase flow is fulfilled.

In an actual scene, a crude oil product contains multiphase mixtures such as oil, water, natural gas and silt, and in the process of multiphase flow mixing and transportation of the crude oil product, the inventor finds that devices such as a tank, a valve and a pipeline for transporting the multiphase mixtures frequently rattle in the operation process, and in some cases, sticky objects containing solids are occasionally found in the pipeline during maintenance, and system operation parameters (such as flow and pressure) often fluctuate greatly, so that devices such as the valve, a liquid level meter, a pressure meter and a flow meter need to be maintained and replaced frequently, and the service life of the devices is far from normal.

However, although the above-mentioned phenomena causing system instability have been improved a lot by the inventor, such as increasing the diameter of the pipeline, controlling the flow rate and pressure, the system operation parameters (such as flow rate and pressure) often fluctuate greatly, and the service life of the valves, level meters, flow meters, pressure meters and other devices is not prolonged significantly. In an accidental attempt, crude oil products need to be separated into gas and liquid and conveyed to different places, the inventor finds that the operation parameters of the system in the gas-liquid separation conveying process have small fluctuation, but the fluctuation is not obvious, in a liquid conveying pipeline, a tank body, a valve, a pipeline and other equipment do not have obvious influence in the operation process, and the whole operation condition of the system is good, wherein one possible explanation is that influence factors which are not beneficial to the flow of a multiphase mixture are generated in the conveying process of the multiphase mixture.

In the embodiment of the application, the reversing mechanism 30 drives the liquid in the first tank 10 and the second tank 20 to circulate back and forth, so that the first tank 10 and the second tank 20 alternately form a vacuum suction cavity and/or a compression discharge cavity, the tank in the vacuum suction cavity sucks in a multiphase mixture, the tank in the compression discharge cavity discharges gas into the first pipeline 41, when the liquid is full, the switching control valve 43 closes the first pipeline 41 and opens the second pipeline 42, so that the overflowed liquid is discharged into the second pipeline 42, the purpose that the first pipeline 41 conveys gas and the second pipeline 42 conveys liquid is realized, the first pipeline 41, the second pipeline 42 and the subsequent gas-liquid receiving equipment have no obvious abnormal noise in the whole gas-liquid separation conveying process, and the subsequent system operation parameters (such as flow and pressure) also keep stable and have no large fluctuation, and the service life of the devices such as the valve, the liquid level meter, the pressure meter and the like is obviously prolonged, and the stability of the production system is improved. One possible explanation for this effect is that, due to the gas-liquid separation and transportation, the influence factors which are not beneficial to the flow of the fluid are avoided in the transportation process, so that the fluctuation of the flow and pressure of the system and the abnormal noise are avoided, and the stability of the production system is further improved.

After the inventor has found that the stability of the production system can be improved by separating and conveying crude oil products, the inventor has made an intensive study on the mechanism of influence factors which are unfavorable for fluid flow in multiphase flow mixed conveying, and found that during the conveying process of crude oil products, silt, light components in water and natural gas and heavy components in oil form sticky objects containing solids under some conditions (such as winter) to block pipelines, so that the phenomena of unstable system operation parameters (such as flow and pressure) and abnormal system noise are caused. On the other hand, the inventor also found that the gas passing through the gaps of the plug during the transportation of the crude oil product generates a slug phenomenon, which in turn further causes the system flow rate and pressure fluctuation. Thus far, the inventors have discovered that multiphase mixture transport of crude oil production is a significant factor that can contribute to unstable operation of the system.

In some embodiments of the present application, the upper portions of the first tank 10 and the second tank 20 may be provided with a feeding port and a discharging port, so that the multiphase mixture is sucked from the feeding port and discharged through the discharging port, it is understood that the feeding port and the discharging port may be disposed at other positions. In some embodiments, the first and second tanks 10, 20 may be polyethylene tanks, polypropylene tanks, glass reinforced plastic tanks, ceramic tanks, rubber tanks, stainless steel tanks, or the like. In some embodiments of the present application, in order to facilitate emptying of the contents of the first and second tanks 10, 20, an evacuation valve may be provided at the bottom of the first and second tanks 10, 20, and the evacuation valve may be opened to evacuate the contents of the first tank 10 when the first tank 10 is serviced. It should be noted that the first tank 10 can also refer to other containers capable of storing multiphase mixtures, such as a tank.

Further, in order to facilitate the detection of the medium state inside the first tank 10 and the second tank 20, the first tank 10 and the second tank 20 may be further provided with a detection device, such as one or more of a temperature detector, a liquid level detector, or a pressure detector. For example, the temperature detector may be a bimetal thermometer, a thermocouple thermometer, a thermal resistance thermometer, or a radiation thermometer; the liquid level detection meter can be a tuning fork vibration type liquid level meter, a magnetic suspension type liquid level meter, a pressure type liquid level meter, an ultrasonic liquid level meter, a sonar wave liquid level meter, a magnetic turning plate liquid level meter or a radar liquid level meter; the pressure detector may be a liquid column type pressure gauge, an elastic type pressure gauge, a load type pressure gauge, an electrical type pressure gauge, or the like.

In some embodiments of the present application, as shown in fig. 1, the power pump 32 in the reversing mechanism 30 may be a single pumping device, the connecting line 31 for the first tank 10 and the second tank 20 to circulate the liquid back and forth may also be a single line, the single line connects the first tank 10 and the second tank 20, the single power pump 32 is disposed on the single line, when the power pump 32 rotates forward, the liquid in the first tank 10 is pumped to the second tank 20, and when the power pump 32 rotates backward, the liquid in the second tank 20 is pumped to the first tank 10, that is, the flowing direction of the liquid between the first tank 10 and the second tank 20 is controlled by controlling the forward rotation and the backward rotation of the power pump 32.

In some embodiments of the present application, the pipeline through which the first tank 10 and the second tank 20 circulate back and forth may also be multiple pipelines, as shown in fig. 2, fig. 2 shows another schematic diagram of the reversing mechanism 30 provided in the embodiments of the present application, wherein the connecting pipeline 31 through which the first tank 10 and the second tank 20 circulate back and forth includes a first sub-pipeline 311, a second sub-pipeline 312, and a third sub-pipeline 313, the first sub-pipeline 311 and the second sub-pipeline 312 are both connected to the first tank 10 and the second tank 20, valves are disposed at four connection ports of the first sub-pipeline 311, the second sub-pipeline 312 to the first tank 10 and the second tank 20, and one end of the third sub-pipeline 313 is connected to the first sub-pipeline 311 and the other end is connected to the second sub-pipeline 312, the power pump 32 is disposed on the third sub-pipeline 313, when the first tank 10 is required to deliver liquid to the second tank 20, the valve of the connection port of the first sub-pipeline 311 and the first tank 10 is opened, the valve of the connection port of the second sub-pipeline 312 and the second tank 20 is opened, the other two valves are closed, and the power pump 32 works to convey liquid from the first tank 10 to the second tank 20; when the second tank 20 is required to convey liquid to the first tank 10, the valve of the connection port of the second sub-pipeline 312 and the first tank 10 is opened, the valve of the connection port of the first sub-pipeline 311 and the second tank 20 is opened, and the other two valves are closed, so that the power pump 32 works to convey liquid from the first tank 10 to the second tank 20, and in the process that the first tank 10 conveys liquid to the second tank 20 and the second tank 20 conveys liquid to the first tank 10, the power pump 32 always conveys liquid in one direction, namely the power pump 32 does not need to rotate in the forward direction and the reverse direction, and the flow direction of the liquid is controlled by controlling the opening and closing of the valves on the first sub-pipeline 311 and the second sub-pipeline 312, so that the situation that the power pump 32 is damaged due to the rotation in the forward direction and the reverse direction is avoided.

In some embodiments of the present application, as shown in fig. 3, fig. 3 shows another schematic diagram of the reversing mechanism 30 in the embodiment of the present application, the reversing mechanism 30 may further include a three-position four-way valve, the power pump 32 and the pipeline are connected by the three-position four-way valve, that is, the first tank 10 and the second tank 20 are connected by the pipeline to the port P and the port T of the three-position four-way valve, the outlet and the inlet of the power pump 32 are connected by the port a and the port B, when the first intermediate tank is required to deliver liquid to the second intermediate tank, the valve core of the three-position four-way valve is in the right position, that is, the port P is communicated with the port B, the port a is communicated with the port T, the circulating pump pumps liquid in the first intermediate tank and delivers the liquid to the second intermediate tank through the port a, the port T, the port P, and the port B, whereas, when the second intermediate tank is required to deliver liquid to the first intermediate tank, the valve core of the three-position, that is, that the port P is communicated with the port a, the port B is communicated with the port T, the circulating pump pumps the liquid in the second intermediate tank and sends the liquid into the first intermediate tank through the port B, the port T, the port P and the port A, and in the process, the communication of the port P, the port T, the port A and the port B is controlled by controlling the position of a valve core in the three-position four-way valve, so that the flow direction of the liquid between the first tank 10 and the second tank 20 is controlled under the condition that the power pump 32 does not need to rotate positively and negatively, and the number of valves is reduced.

In some embodiments of the present application, as shown in fig. 1, the first pipeline 41 is provided with a first inlet 411 connecting the first tank 10 and the second tank 20, respectively, and a first outlet 412 remote from the first inlet 411; the second line 42 is provided with a second inlet 421 connecting the first and second tanks 10 and 20, respectively, and a second outlet 422 distant from the second inlet 421. When the gas is discharged from the first tank 10 or the second tank 20, the gas flows through the first inlet 411 and is finally discharged through the first outlet 412. When the liquid is discharged from the first tank 10 or the second tank 20, the gas flows through the second inlet 421 and is finally discharged through the second outlet 422.

In some embodiments of the present application, as shown in fig. 1, to achieve the communication of the first line 41 with the first tank 10 and the second tank 20, the first line 41 may be directly connected with the first tank 10 and the second tank 20, that is, when gas is discharged from the first tank 10 or the second tank 20, the first line 41 may be directly entered from the first inlet 411, wherein the first line 41 may be connected at a discharge port at the top of the first tank 10 and the second tank 20. Further, to achieve the communication between the second pipeline 42 and the first and second tanks 10 and 20, the second pipeline 42 may be connected to the first pipeline 41 in a bypass manner, that is, the second pipeline 42 is connected to the first and second tanks 10 and 20 through the first pipeline 41, when the gas is discharged from the first or second tank 10 or 20, the gas flows out through the first outlet 412 of the first pipeline 41, and when the liquid is discharged from the first or second tank 10 or 20, the liquid flows through the first pipeline 41, then flows into the second pipeline 42 connected in a bypass manner, and finally is discharged out through the second outlet 422. It is understood that the first and second lines 41 and 42 may be connected to the first and second tanks 10 and 20 through other lines to communicate the first and second lines 41 and 42 with the first and second tanks 10 and 20.

Further, to realize that the control valve 43 controls the closing or opening of the first pipeline 41 and the second pipeline 42, as shown in fig. 1, the control valve 43 may be four two-way valves, two of which are respectively disposed at the first inlet 412 where the first pipeline 41 is connected to the first tank 10 and the second tank 20, and are used for controlling whether the first tank 10 and the second tank 20 are opened or closed, in the process of delivering the liquid from the first tank 10 to the second tank 20, the valve at the connection between the first tank 10 and the first pipeline 41 is closed, and the valve at the connection between the second tank 20 and the second pipeline 42 is opened, so as to prevent the fluid pressed into the first tank 10 by the second tank 20 from flowing back to the first tank 10. Two other second valves are respectively arranged at the first outlet 412 and the second outlet 422 of the first pipeline 41 and the second pipeline 42, when the first tank 10 or the second tank 20 presses gas into the first pipeline 41, the valve at the first outlet 412 on the first pipeline 41 can be opened, and the valve at the second outlet 422 on the second pipeline 42 can be closed, so that the gas exhausted from the first tank 10 or the second tank 20 is exhausted through the first outlet 412 of the first pipeline 41; when the first tank 10 or the second tank 20 presses the liquid into the first pipeline 41, the valve at the first outlet 412 on the first pipeline 41 may be closed, and the valve at the second outlet 422 on the second pipeline 42 may be opened, so that the liquid discharged from the first tank 10 or the second tank 20 is discharged through the second outlet 422 of the second pipeline 42.

In some embodiments of the present application, the control valve 43 may include a three-way valve and two-way valves, for example, as shown in fig. 4, fig. 4 shows a schematic diagram of an output structure in the embodiment of the present application, wherein the three-way valve is disposed at a connection point of the second pipeline 42 and the first pipeline 41, the two-way valves are respectively disposed at a first inlet 411 of the first pipeline 41 connected with the first tank 10 and the second tank 20, and the two-way valves control opening or closing of the first tank 10 and the second tank 20. When the first tank 10 or the second tank 20 discharges gas, the three-way valve conducts the first outlet 412 of the first pipeline 41 and closes the second outlet 412 of the second pipeline 42, and when the first tank 10 or the second tank 20 discharges liquid, the three-way valve controls the second outlet 422 of the second pipeline 42 to conduct and the first outlet 412 of the first pipeline 41 to close, namely, the three-way valve controls the liquid or gas to flow out through the first pipeline 41 or the second pipeline 42, thereby reducing the number of control valves 43 and the control complexity.

As another example, as shown in fig. 5, fig. 5 shows another schematic diagram of the output structure in the embodiment of the present application, the control valve 43 may include a three-way valve and two-way valves, wherein the three-way valve is disposed at a branch point where the first pipeline 41 is connected to the first tank 10 and the second tank 20, the two-way valves are respectively disposed at the first outlet 412 and the second outlet 422 of the first pipeline 41 and the second pipeline 42, i.e., the opening or closing of the fluid inlet and outlet of the first tank 10 and the second tank 20 is controlled by the three-way valve, and the two-way valves respectively control the opening or closing of the first outlet 412 of the first pipeline 41 and the second outlet 422 of the second pipeline 42.

As still another example, as shown in fig. 6, fig. 6 shows another schematic diagram of the output structure in the embodiment of the present application, wherein the control valve may include two three-way valves, one three-way valve is disposed at the branch of the first pipeline 41 connected to the first tank 10 and the second tank 20, the other three-way valve is disposed at the connection of the first pipeline 41 and the second pipeline 42, i.e., the opening or closing of the fluid inlet and outlet of the first tank 10 and the second tank 20 is controlled by one three-way valve, and the other three-way valve controls the opening or closing of the first outlet 412 of the first pipeline 41 and the second outlet 422 of the second pipeline 42.

As still another example, as shown in fig. 7, fig. 7 shows another schematic diagram of the output structure in the embodiment of the present application, the control valve 43 may be only a four-way valve, wherein the second line 42 is connected to a branch connection of the first line 41 and the first and second tanks 10 and 20, and the four-way valve is disposed at the branch connection, and controls the opening and closing of the first and second tanks 10 and 20 and controls the conduction or closing of the first and second lines 41 and 42 through a single four-way valve.

In still other embodiments of the present application, as shown in fig. 8, fig. 8 shows a schematic mechanism diagram of an output structure in the embodiments of the present application, the second line 42 and the first line 41 may be separate lines, wherein the first line 41 is connected to the first tank 10 and the second tank 20, the second line 42 is connected to the first tank 10 and the second tank 20, since the first line 41 and the second line 42 are both connected to the first tank 10 and the second tank 20 at the same time, when the first tank 10 or the second tank 20 discharges gas, the first line 41 communicates with the first tank 10 or the second tank 20, and the gas enters the first line 41 from the first inlet 411 and then is discharged from the first outlet 412; when the first tank 10 or the second tank 20 discharges liquid, the second pipeline 42 is communicated with the first tank 10 or the second tank 20, and the liquid enters the second pipeline 42 from the second inlet 421 and then is discharged from the second outlet 422, so that the purpose of separating and conveying the gas and the liquid of the first tank 10 and the second tank 20 is realized.

In some of the above embodiments, for example, in the embodiment where the first pipeline 41 and the second pipeline 42 are both connected to the first tank 10 and the second tank 20 at the same time, as shown in fig. 8, the control valve 43 may include four two-way valves, two of which are respectively disposed at the first inlet 411 where the first pipeline 41 is connected to the first tank 10 and the second tank 20, and the other two of which are respectively disposed at the second inlet 421 where the second pipeline 42 is connected to the first tank 10 and the second tank 20, that is, the flow direction of the gas and the liquid is determined directly by whether the first tank 10 and the second tank 20 are opened or not relative to the first pipeline 41 and the second pipeline 42. It should be noted that for the embodiment where the first pipeline 41 and the second pipeline 42 are both connected to the first tank 10 and the second tank 20, the control valve 43 may be arranged in other manners, for example, the control valve 43 may further include two three-way valves, the two three-way valves controlling the connection between the first pipeline 41 and the second pipeline 42, and for example, the control valve 43 may further include two-way valves and one three-way valve. In some embodiments, the control valve 43 may be a powered valve, such as a solenoid valve, a mechanically driven valve, or the like.

In some embodiments of the present application, in order to facilitate the multiphase flow entering the first tank 10 and the second tank 20, and to realize the multiphase flow extraction and separation transportation process, as shown in fig. 9, fig. 9 shows a schematic diagram of another mechanism of the multiphase flow transportation device of the present application, wherein the multiphase flow transportation device may further include an input mechanism 50, the input mechanism 50 includes a third line 51 and a second control valve 52, the third line 51 is communicated with the first tank 10 and the second tank 20, the second control valve 52 is used for controlling the communication or closing of the third line 51 with the first tank 10 and the second tank 20, and the third line 51 may be connected with the feeding ports at the top of the first tank 10 and the second tank 20. The multiphase mixture flows through the third pipeline 51, and when the reversing mechanism 30 pumps the liquid in the first tank 10 and sends the liquid into the second tank 20, so that the first tank 10 forms a vacuum suction cavity and the second tank 20 forms a compression discharge cavity, the second control valve 52 controls the third pipeline 51 to be communicated with the first tank 10 and closes the passage between the second tank 20 and the third pipeline 51, so that the multiphase mixture is pumped by the first tank 10; on the contrary, when the first tank 10 forms a compression discharge chamber and the second tank 20 forms a vacuum suction chamber, the second control valve 52 controls the third pipeline 51 to communicate with the second tank 20 and closes the passage between the first tank 10 and the third pipeline 51, so as to realize the extraction of the multiphase mixture by the second tank 20. For example, the third control valve 43 may be a single three-way valve, or may be two-way valves respectively disposed at the connection of the third pipeline 51 and the first and second tanks 10 and 20. It should be noted that the input mechanism 50 may also be two pipelines respectively connected to the first tank 10 and the second tank 20, and corresponding valves are disposed on the two pipelines so as to control the communication between the two pipelines and the first tank 10 and the second tank 20.

In some embodiments of the present application, in order to determine the timing when the control valve 43 opens the first pipeline 41 and the second pipeline 42 to deliver the liquid and the gas, respectively, the output mechanism 40 may further include a detector for feeding back the physical state information of the fluid flowing through the output mechanism 40, and when the detector detects that the fluid flowing through the output mechanism 40 is the gas, the control valve 43 controls the first pipeline 41 to be conducted and closes the second pipeline 42; when the detector detects that the output mechanism 40 is liquid, the control valve 43 controls the second pipeline 42 to be conducted and closes the first pipeline 41, so that the time for the control valve 43 to open the first pipeline 41 and the time for the second pipeline 42 to convey liquid and gas respectively can be accurately determined. For example, the detector may include a first liquid level meter disposed at the first tank 10 and a second liquid level meter disposed at the second tank 20, when the first liquid level meter detects that the liquid level of the first tank 10 reaches the top of the tank, indicating that the gas in the upper part of the first tank 10 is completely discharged and the liquid is to be discharged, the first tank 10 and the second pipeline 42 are conducted under the control of the control valve 43; similarly, when the second liquid level meter detects that the liquid level in the second tank 20 reaches the top of the tank, which indicates that the gas in the upper part of the second tank 20 is completely discharged, the liquid is to be discharged, and the control valve 43 controls the conduction of the second tank 20 and the second pipeline 42. As another example, the detector may be a flow meter, such as a liquid flow meter or a gas flow meter, which is disposed in the first pipeline 41 or the second pipeline 42, and determines the start timing of the control valve 43 by determining whether the flow rate is 0 or not.

It should be noted that the above-mentioned multiphase flow conveying device is particularly suitable for conveying multiphase flow mixtures containing both gas and liquid, and can also be used for conveying single-phase liquid or gas, and can also be used for conveying materials or other fluids containing solid, gaseous and liquid materials.

In order to better implement the multiphase flow transportation device in the embodiment of the present application, on the basis of the multiphase flow transportation device, there is also provided a multiphase flow transportation system in the embodiment of the present application, the multiphase flow transportation system includes a controller, a bus, and the multiphase flow transportation device in any of the above embodiments, wherein:

the controller is a control center of the multiphase flow conveying system, various interfaces and lines are used for connecting all parts of the whole system, and various functions of the device are executed by running or executing stored programs, so that the system is controlled integrally. Optionally, the controller may include one or more processing cores; the controller may be a Central Processing Unit (CPU), other general purpose controller, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, a Programmable logic controller (PLC controller), etc.

A bus is a communication network of the multiphase flow delivery system that allows communication between various parts of the system to facilitate the transfer of information and/or data. Optionally, the industrial communication network may include wired communication, such as a field bus, an industrial ethernet, an industrial Internet (TSN), and the like, and may also include wireless communication, such as a Narrow Band Internet of Things (NB-IoT), and the like.

The multiphase flow transportation device is a device for performing multiphase flow separation transportation, and specifically, the multiphase flow transportation device is connected to the controller through a bus, for example, the control valve 43 may be connected to the controller through a bus, the power pump 32 may be connected to the controller through a bus, and a liquid level meter, a temperature meter, a pressure meter, and the like may be connected to the controller through a bus.

It should be noted that the above description of the multiphase flow delivery system is only for the purpose of clearly explaining the verification process of the present application, and those skilled in the art can make equivalent modifications to the above system under the guidance of the present application, for example, the multiphase flow delivery system may further include a display for displaying parameters (e.g., pressure, temperature) in the multiphase flow delivery device.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed descriptions of other embodiments, and are not described herein again.

Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing detailed disclosure is to be considered merely illustrative and not restrictive of the broad application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.

Also, this application uses specific language to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

It should be noted that in the foregoing description of embodiments of the present application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.

The multiphase flow conveying device and the multiphase flow conveying system provided by the embodiments of the present application are described in detail above, and the principle and the implementation of the present invention are explained in this document by applying specific examples, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A multiphase flow delivery device, comprising:

a first tank;

a second tank;

the reversing mechanism is connected with the first tank body and the second tank body and is used for driving the liquid in the first tank body and the liquid in the second tank body to circulate in a reciprocating manner, so that the first tank body and the second tank body alternately form a vacuum suction cavity and/or a compression discharge cavity, and the continuous mixing and conveying of liquid, gas or a gas-liquid mixture is realized;

the output mechanism comprises a first pipeline for conveying gas, a second pipeline for conveying the liquid and a control valve for controlling the first pipeline and the second pipeline to be switched on and off;

when the control valve is used for conveying gas, the first pipeline is communicated with the first tank body and the second tank body, and the second pipeline is closed; the control valve conducts a second pipeline and closes the first pipeline when conveying liquid, and the second pipeline is communicated with the first tank body and the second tank body.

2. A multiphase flow transportation device as claimed in claim 1, wherein the first pipeline is provided with a first inlet communicating with the first tank and the second tank, respectively, and a first outlet remote from the first inlet and adjacent to the control valve;

preferably, the second line is provided with a second inlet communicating with the first tank and the second tank, respectively, and a second outlet remote from the second inlet and adjacent to the control valve.

3. A multiphase flow transportation device as defined in claim 2, wherein the first line is connected to the first tank and the second tank, and the second line is connected to the first line to form a bypass passage.

4. A multiphase flow transportation device as defined in claim 3,

the control valve comprises a three-way valve and two-way valves, the three-way valve is arranged at the joint of the second pipeline and the first pipeline, and the two-way valves are respectively arranged at the joint of the first pipeline and the first tank body and the second tank body.

5. A multiphase flow transportation device as defined in claim 3,

the control valve comprises four two-way valves, wherein two of the two-way valves are respectively arranged at the joint of the first pipeline and the first tank body and the second tank body, and the other two of the two-way valves are respectively arranged at the first outlet and the second outlet.

6. A multiphase flow delivery device as defined in claim 2, wherein the first line is connected to the first and second tanks and the second line is connected to the first and second tanks.

7. A multiphase flow transportation device as defined in claim 6,

the control valve comprises four two-way valves, wherein two of the two-way valves are respectively arranged at the joints of the first pipeline and the first tank body and the second tank body, and the other two of the two-way valves are respectively arranged at the joints of the second pipeline and the first tank body and the second tank body.

8. A multiphase flow transportation device as claimed in claim 1, wherein the output mechanism further comprises a detector for feeding back the physical state information of the fluid flowing through the output mechanism.

9. A multiphase flow transportation device as recited in claim 8 wherein the detector comprises a first liquid level meter disposed at the first tank for detecting the level of liquid in the first tank and a second liquid level meter disposed at the second tank for detecting the level of liquid in the second tank.

10. A multiphase flow transportation device as claimed in any one of claims 1 to 9 further comprising an input mechanism, the input mechanism comprising a third line and a second control valve, the third line being in communication with the first tank and the second tank, the second control valve being configured to control the third line to conduct or close the first tank and the second tank.

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