Slug flow and pseudo-slug flow intelligent generation device and method

Abstract

The present invention relates to an intelligent generating device for slug flow and pseudo-slug flow, comprising a gas phase passage, a liquid phase passage and an intelligent controller. After the two fluids are mixed, they pass through an experimental section and then enter a gas-liquid separator. The gas phase passage comprises an air compressor, a buffer tank and a gas phase regulating valve. The air compressor provides a gas phase, which enters the buffer tank through a gas phase switch valve, enters the experimental section after passing through a temperature transmitter, a pressure transmitter, a gas phase standard meter, a gas phase regulating valve and a gas phase three-way valve, and the third port of the gas phase three-way valve is used for gas phase evacuation; the liquid phase passage comprises a liquid storage tank and a pump, the pump provides a liquid phase, which passes through a temperature transmitter, a pressure transmitter, a liquid phase standard meter, a liquid phase regulating valve and a liquid phase three-way valve in sequence and then enters the experimental section, and the third port of the liquid phase three-way valve is used for liquid phase reflux. The present invention also provides a generating method.

Description

Technical Field

[0001] The invention belongs to the field of gas-liquid two-phase flow pseudo-slug flow and flow characteristics of slug flow and gas-liquid two-phase flow measurement. Background Art

[0002] Gas-liquid two-phase flow is common in the chemical industry, oil and gas production, nuclear power and metallurgical industries. Affected by factors such as temperature, pressure, composition and pipe diameter, gas-liquid two-phase flow will form a variety of flow patterns in the pipeline, such as stratified flow, wavy flow, annular flow, mist flow, slug flow or pseudo-slug flow. Among them, the existence of pseudo-slug flow and slug flow poses a great challenge to the normal operation of production. For example, the existence of slug flow in oil and gas production will not only accelerate the corrosion of equipment, but also affect the metering accuracy of oil and gas. What's more, it will cause vibration of pipelines and equipment and cause serious safety hazards.

[0003] At present, some oil and gas companies and research institutions at home and abroad have conducted theoretical and experimental research on the flow measurement, capture and elimination of pseudo-slug flow and slug flow. In order to better simulate the pseudo-slug flow and slug flow that appear in the industrial field, the existing pseudo-slug flow and slug flow generating devices are mainly based on natural flow formation or simulated terrain liquid plug generation. The disadvantage is that the length of the pipeline is as long as tens to thousands of meters. Among them, the more representative ones are the French Petroleum Institute, whose pipeline is 50 meters long; China University of Petroleum, whose pipeline is 340 meters long; University of Tulsa in the United States, whose pipeline is 420 meters long; Imperial College London, whose loop is 36 meters long. Such a long-distance pipeline not only occupies a large area, but also consumes a lot of energy in operation, and the liquid plug formed has poor adjustability. According to the existing flow pattern diagram, the pseudo-slug flow and slug flow formed under a certain gas-liquid phase flow rate are certain, and the characteristics such as the liquid plug length and frequency cannot be adjusted. Summary of the invention

[0004] In view of the problems existing in the existing pseudo-slug flow and slug flow generating devices, the present invention proposes a pseudo-slug flow and slug flow intelligent device. In addition to its small footprint and simple operation, its most important feature is that it can intelligently generate liquid plug length and liquid plug strength, and realize efficient simulation of gas-liquid two-phase flow slug flow or pseudo-slug flow, so as to better serve scientific research and production. The technical solution is as follows:

[0005] A slug flow and pseudo-slug flow intelligent generating device, comprising a gas phase passage, a liquid phase passage and an intelligent controller. After the two fluids are mixed, they pass through an experimental section and then enter a gas-liquid separator. The gas phase passage comprises an air compressor, a buffer tank and a gas phase regulating valve. The air compressor provides a gas phase, which enters the buffer tank through a gas phase switch valve, and enters the experimental section after passing through a temperature transmitter, a pressure transmitter, a gas phase standard meter, a gas phase regulating valve and a gas phase three-way valve. The third port of the gas phase three-way valve is used for gas phase exhaust; the liquid phase passage comprises a liquid storage tank and a pump. The pump provides a liquid phase, which passes through a temperature transmitter, a pressure transmitter, a liquid phase standard meter, a liquid phase regulating valve and a liquid phase three-way valve in sequence and then enters the experimental section. The third port of the liquid phase three-way valve is used for liquid phase reflux;

[0006] The intelligent controller includes an electrical input interface, an industrial computer for signal processing, and an electrical output interface; the electrical input interface is used to collect output values ​​of various transmitters and standard meters; after the industrial computer processes the information collected by the electrical input interface, it sends corresponding instructions through the electrical output interface; the instructions sent by the electrical output interface are used to control the opening of the gas phase regulating valve, the action of the gas phase three-way valve, the opening of the liquid phase regulating valve, the action of the liquid phase regulating valve and the action of the liquid phase three-way valve; under the control of the intelligent controller, the gas phase and the liquid phase form slug flow and pseudo-slug flow in the experimental section.

[0007] The present invention also provides a method for generating slug flow and pseudo-slug flow by using the device, which is characterized in that, according to different settings of the liquid plug cycle, it is divided into two modes: periodicity and randomness, wherein the periodicity means that the duration of each liquid plug and the frequency of liquid plug occurrence, or the duration of gas plug and the frequency of gas plug occurrence are determined; while the randomness means that the duration of each liquid plug and the frequency of liquid plug occurrence, or the duration of gas plug and the frequency of gas plug occurrence are adjustable; according to different gas-liquid input modes, it is divided into three types: gas-liquid alternating input mode, gas-continuous liquid alternating input mode and liquid-continuous gas alternating input mode, wherein the gas-liquid alternating input mode means that when the gas phase flows through the experimental section, the liquid phase returns to the liquid storage tank by bypass; when the liquid phase flows through the experimental section, The gas phase is directly discharged by the bypass, and a slug flow is formed at this time; the gas-continuous-liquid alternating input mode means that the gas phase flows through the experimental section all the time without bypassing, while the liquid phase is alternately input to flow through the experimental section, and a pseudo-slug flow is formed at this time; the liquid-continuous-gas alternating input mode means that the liquid phase flows through the experimental section all the time without bypassing, while the gas phase is alternately input to flow through the experimental section, and a pseudo-slug flow is formed at this time; thus, there are six working modes, namely: "periodic slug flow gas-liquid alternating input mode", "periodic pseudo-slug flow gas-continuous liquid alternating input mode", "periodic pseudo-slug flow liquid-continuous gas alternating input mode", "random slug flow gas-liquid alternating input mode", "random pseudo-slug flow gas-continuous liquid alternating input mode", and "random pseudo-slug flow liquid-continuous gas alternating input mode". BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 Structural diagram of pseudo-slug flow and intelligent slug flow generating device

[0009] Figure 2 Periodic slug flow gas-liquid alternating input mode

[0010] Figure 3 Periodic pseudo-slug flow gas-continuous liquid alternating input mode

[0011] Figure 4 Periodic pseudo-slug flow liquid-continuous gas alternating input mode

[0012] Figure 5 Random slug flow gas-liquid alternating input mode

[0013] Figure 6 Random pseudo-slug flow gas-continuous liquid alternating input mode

[0014] Figure 7 Random pseudo-slug flow liquid-continuous gas alternating input mode

[0015] The accompanying drawings are as follows:

[0016] 1: Air compressor 2, 8, 14, 15: Switch valve 3: Safety valve 4: Buffer tank 5, 17: Temperature and pressure integrated transmitter 6: Gas phase standard table 7, 19: Control valve 9: Intelligent controller 10, 20: Three-way valve 11: Y-type connector 12: Experimental section 13: Gas-liquid separator 16: Pump 18: Liquid phase standard table 21: Liquid storage tank DETAILED DESCRIPTION

[0017] The content of the present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0018] The overall structure of the slug flow and pseudo-slug flow intelligent generating device of the present invention is shown in Figure 1 , mainly including air compressor 1, switch valves 2, 8, 14, 15, safety valve 3, buffer tank 4, temperature and pressure integrated transmitter 5, 17, gas phase standard meter 6, regulating valve 7, 19, intelligent controller 9, three-way valve 10, 20, Y-type connector 11, experimental section 12, gas-liquid separator 13, pump 16, liquid phase standard meter 18, liquid storage tank 21. The air compressor 1 provides gas phase, which enters the buffer tank 4 through the switch valve 2, and enters the experimental section 12 through the temperature and pressure integrated transmitter 5, gas phase standard meter 6, regulating valve 7, three-way valve 10 and Y-type connector 11 in turn. The pump 16 provides liquid phase, which enters the experimental section 12 through the temperature and pressure integrated transmitter 17, liquid phase standard meter 18, regulating valve 19, three-way valve 20 and Y-type connector 11 in turn.

[0019] The entire device can be operated by the intelligent controller 9. The operator sets the gas and liquid flow rate, the duration of the liquid plug, the frequency of the liquid plug, the duration of the gas plug, the frequency of the gas plug, and the gas-liquid input method when the liquid plug occurs through the intelligent controller 9. After the setting is completed, the intelligent controller 9 will form a pseudo-slug flow or slug flow that meets the requirements according to the preset program. Windows and other sensors can be installed at the experimental section 12 to study the characteristics of pseudo-slug flow or slug flow. The liquid phase returns to the liquid storage tank 21 after passing through the gas-liquid separator 13 to form a cycle, and the gas phase is directly discharged.

[0020] According to the different settings of the liquid plug cycle, it can be divided into two modes: periodicity and randomness. The periodicity means that the duration of each liquid plug and the frequency of liquid plug, or the duration of the gas plug and the frequency of gas plug are determined; while the randomness means that the duration of each liquid plug and the frequency of liquid plug or the duration of the gas plug and the frequency of gas plug are adjustable. According to the different gas-liquid input modes, it can be divided into three types: gas-liquid alternating input mode, gas-continuous liquid alternating input mode and liquid-continuous gas alternating input mode. The gas-liquid alternating input mode means that when the gas phase flows through the experimental section 12, the liquid phase returns to the liquid storage tank 21 by bypass; similarly, when the liquid phase flows through the experimental section 12, the gas phase is directly emptied by the bypass, and a slug flow is formed at this time. The gas-continuous liquid alternating input mode means that the gas phase flows through the experimental section 12 all the time without bypassing, while the liquid phase alternately flows through the experimental section 12, and a pseudo-slug flow is formed at this time. The liquid-continuous gas alternating input mode means that the liquid phase flows through the experimental section 12 all the time without bypassing, while the gas phase is alternately input and flows through the experimental section 12, and a pseudo-slug flow is formed at this time. In summary, the generator has six working modes, namely: "Periodic slug flow gas-liquid alternating input mode", "Periodic pseudo-slug flow gas-continuous liquid alternating input mode", "Periodic pseudo-slug flow liquid-continuous gas alternating input mode", "Random slug flow gas-liquid alternating input mode", "Random pseudo-slug flow gas-continuous liquid alternating input mode", "Random pseudo-slug flow liquid-continuous gas alternating input mode". Its specific implementation method is as follows:

[0021] (1) Periodic slug flow gas-liquid alternating input mode

[0022] First, the gas phase flow rate Q m is set by the intelligent controller 9 3 / h and liquid flow rate Wm 3 / h, then set the duration of the gas phase to t1, the duration of the liquid phase to t2, and select the periodic plug flow gas-liquid alternating input mode. After the start, the gas phase is switched to the experimental section 12 through the three-way valve 10, and the liquid phase is switched to the bypass through the three-way valve 20. At this time, the gas phase flows through the experimental section 12, and the liquid phase returns to the liquid storage tank 21 through the bypass, and the duration is t1; after the timing reaches t1, the gas phase is switched to the bypass through the three-way valve 10, and the liquid phase is switched to the experimental section 12 through the three-way valve 20. At this time, the gas phase is emptied through the bypass, and the liquid phase flows through the experimental section 12, and the duration is t2; after the timing reaches t2, the gas phase is switched to the experimental section 12 through the three-way valve 10, and the liquid phase is switched to the bypass through the three-way valve 20. At this time, the gas phase flows through the experimental section 12, and the liquid phase returns to the liquid storage tank 21 through the bypass, and the duration is t1. Repeating this cycle can obtain a periodic gas-liquid alternating input plug flow with a gas phase duration of t1 and a liquid phase duration of t2 at the experimental section 12, such as Figure 2 shown.

[0023] (2) Periodic pseudo-slug flow gas-continuous liquid alternating input mode

[0024] First, the gas phase flow rate Q m is set by the intelligent controller 9 3 / h and liquid flow rate Wm 3 / h, then set the liquid plug interval time to t1, the liquid phase duration time to t2, and select the periodic pseudo-slug flow gas-continuous liquid alternating input mode. After the start, the gas phase is switched to the experimental section 12 through the three-way valve 10, and the liquid phase is switched to the bypass through the three-way valve 20. At this time, the gas phase flows through the experimental section 12, and the liquid phase returns to the liquid storage tank 21 through the bypass, and the duration is t1; after the timing reaches t1, the gas phase is still switched to the experimental section 12 through the three-way valve 10, and the liquid phase is also switched to the experimental section 12 through the three-way valve 20. At this time, both the gas and liquid phases flow through the experimental section 12, and the duration is t2; after the timing reaches t2, the gas phase is still switched to the experimental section 12 through the three-way valve 10, and the liquid phase is switched to the bypass through the three-way valve 20. At this time, the gas phase flows through the experimental section 12, and the liquid phase returns to the liquid storage tank 21 through the bypass, and the duration is t1; such a cycle can be repeated to obtain a pseudo-slug flow with periodic gas-liquid alternating input with a liquid plug interval time of t1 and a liquid phase duration of t2 at the experimental section 12, such as Figure 3 shown.

[0025] (3) Periodic pseudo-slug flow liquid-continuous gas alternating input mode

[0026] First, the gas phase flow rate Q m is set by the intelligent controller 9 3 / h and liquid flow rate W m 3 / h, then set the time of the gas plug interval to t1, the gas phase duration to t2, and select the periodic pseudo-slug flow liquid-continuous gas alternating input mode. After the start, the liquid phase is switched to the experimental section 12 through the three-way valve 20, and the gas phase is switched to the bypass through the three-way valve 10. At this time, the liquid phase flows through the experimental section 12, and the gas phase is emptied through the bypass, and the duration is t1; after the timing reaches t1, the liquid phase is still switched to the experimental section 12 through the three-way valve 20, and the gas phase is also switched to the experimental section 12 through the three-way valve 10. At this time, both the gas and liquid phases flow through the experimental section 12, and the duration is t2; after the timing reaches t2, the liquid phase is still switched to the experimental section 12 through the three-way valve 20, and the gas phase is switched to the bypass through the three-way valve 10. At this time, the liquid phase flows through the experimental section 12, and the gas phase is emptied through the bypass, and the duration is t1; such a cycle can be repeated to obtain a periodic liquid-continuous gas alternating input pseudo-slug flow with a gas plug interval time of t1 and a gas phase duration of t2 at the experimental section 12, such as Figure 4 shown.

[0027] (4) Random slug flow gas-liquid alternating input mode

[0028] First, the gas phase flow rate Q m is set by the intelligent controller 9 3 / h and liquid flow rate Wm 3 / h, and then set the number of gas-liquid alternations, assuming it is 3 times. Then set the first duration of the gas phase t1, the first duration of the liquid phase t2, the second duration of the gas phase t3, the second duration of the liquid phase t4, the third duration of the gas phase t5, and the third duration of the liquid phase t6. The durations of each duration can be the same or different. Select the random slug flow gas-liquid alternation input mode. After the start, the gas phase is switched to the experimental section 12 through the three-way valve 10, and the liquid phase is switched to the bypass through the three-way valve 20. At this time, the gas phase flows through the experimental section 12, and the liquid phase returns to the liquid storage tank 21 through the bypass, and the duration is t1; after the timing reaches t1, the gas phase is switched to the bypass through the three-way valve 10, and the liquid phase is switched to the experimental section 12 through the three-way valve 20. At this time, the gas phase is emptied through the bypass, and the liquid phase flows through the experimental section 12, and the duration is t2; after the timing reaches t2, the gas phase is switched to the experimental section 12 through the three-way valve 10, and the liquid phase is switched to the bypass through the three-way valve 20. At this time, the gas phase flows through the experimental section 12, and the liquid phase returns to the liquid storage tank 21 through the bypass, and the duration is t3; After the timing reaches t3, the gas phase is switched to the bypass through the three-way valve 10, and the liquid phase is switched to the experimental section 12 through the three-way valve 20. At this time, the gas phase is emptied through the bypass, and the liquid phase flows through the experimental section 12, and the duration is t4; after the timing reaches t4, the gas phase is switched to the experimental section 12 through the three-way valve 10, and the liquid phase is switched to the bypass through the three-way valve 20. At this time, the gas phase flows through the experimental section 12, and the liquid phase returns to the liquid storage tank 21 through the bypass, and the duration is t5; after the timing reaches t5, the gas phase is switched to the bypass through the three-way valve 10, and the liquid phase is switched to the experimental section 12 through the three-way valve 20. At this time, the gas phase is emptied through the bypass, and the liquid phase flows through the experimental section 12, and the duration is t6. This cycle can be repeated to obtain three random gas-liquid alternating input slug flows at the experimental section 12, such as Figure 5 shown.

[0029] (5) Random pseudo-slug flow gas-continuous liquid alternating input mode

[0030] First, the gas phase flow rate Q m is set by the intelligent controller 9 3 / h and liquid flow rate Wm 3 / h, and then set the number of times the liquid plug comes, assuming it is 3 times. Then set the time t1 of the first interval of the liquid plug, the time t2 of the first duration of the liquid phase, the time t3 of the second interval of the liquid plug, the time t4 of the second duration of the liquid phase, the time t5 of the third interval of the liquid plug, and the time t6 of the third duration of the liquid phase. The duration and interval time of each time can be the same or different. Select the random pseudo-slug flow gas-continuous liquid alternating input mode. After the start, the gas phase is switched to the experimental section 12 through the three-way valve 10, and the liquid phase is switched to the bypass through the three-way valve 20. At this time, the gas phase flows through the experimental section, and the liquid phase returns to the liquid storage tank 21 through the bypass, and the duration is t1; after the timing reaches t1, the gas phase is still switched to the experimental section 12 through the three-way valve 10, and the liquid phase is also switched to the experimental section 12 through the three-way valve 20. At this time, both the gas and liquid phases flow through the experimental section 12, and the duration is t2; after the timing reaches t2, the gas phase is still switched to the experimental section 12 through the three-way valve 10, and the liquid phase is switched to the bypass through the three-way valve 20. At this time, the gas phase flows through the experimental section 12, and the liquid phase returns to the liquid storage tank 21 through the bypass, and the duration is t3; After the timing reaches t3, the gas phase is still switched to the experimental section 12 through the three-way valve 10, and the liquid phase is also switched to the experimental section 12 through the three-way valve 20. At this time, both the gas and liquid phases flow through the experimental section 12, and the duration is t4; after the timing reaches t4, the gas phase is still switched to the experimental section 12 through the three-way valve 10, and the liquid phase is switched to the bypass through the three-way valve 20. At this time, the gas phase flows through the experimental section 12, and the liquid phase returns to the liquid storage tank 21 through the bypass, and the duration is t5; after the timing reaches t5, the gas phase is still switched to the experimental section 12 through the three-way valve 10, and the liquid phase is also switched to the experimental section 12 through the three-way valve 20. At this time, both the gas and liquid phases flow through the experimental section 12, and the duration is t6. This cycle can be repeated to obtain three pseudo-segment plug flows with random gas-liquid alternating inputs at the experimental section 12, such as Figure 6 shown.

[0031] (6) Random pseudo-slug flow liquid-continuous gas alternating input mode

[0032] First, the gas phase flow rate Q m is set by the intelligent controller 9 3 / h and liquid flow rate Wm 3 / h, and then set the number of gas locks, assuming it is 3 times. Then set the time t1 of the first gas lock interval, t2 of the first gas phase duration, t3 of the second gas lock interval, t4 of the second gas phase duration, t5 of the third gas lock interval, and t6 of the third gas phase duration. The duration and interval time of each time can be the same or different. Select the random liquid-continuous gas alternating input mode. After the start, the liquid phase is switched to the experimental section 12 through the three-way valve 20, and the gas phase is switched to the bypass through the three-way valve 10. At this time, the liquid phase flows through the experimental section 12, and the gas phase is emptied through the bypass, and the duration is t1; after the timing reaches t1, the liquid phase is still switched to the experimental section 12 through the three-way valve 20, and the gas phase is also switched to the experimental section 12 through the three-way valve 10. At this time, both the gas and liquid phases flow through the experimental section 12, and the duration is t2; after the timing reaches t2, the liquid phase is still switched to the experimental section 12 through the three-way valve 20, and the gas phase is switched to the bypass through the three-way valve 10. At this time, the liquid phase flows through the experimental section 12, and the gas phase is emptied through the bypass, and the duration is t3; to be determined After time t3, the liquid phase is still switched to the experimental section 12 through the three-way valve, and the gas phase is also switched to the experimental section 12 through the three-way valve 10. At this time, both the gas and liquid phases flow through the experimental section 12, and the duration is t4; after the timer reaches t4, the liquid phase is still switched to the experimental section 12 through the three-way valve 20, and the gas phase is switched to the bypass through the three-way valve 10. At this time, the liquid phase flows through the experimental section 12, and the gas phase is emptied through the bypass, and the duration is t5; after the timer reaches t5, the liquid phase is still switched to the experimental section 12 through the three-way valve 20, and the gas phase is also switched to the experimental section 12 through the three-way valve 10. At this time, both the gas and liquid phases flow through the experimental section 12, and the duration is t6. This cycle can be repeated to obtain three pseudo-segment plug flows with random liquid-continuous gas alternating inputs at the experimental section 12, such as Figure 7 shown.

[0033] All operations can be set up through the intelligent controller 9. Once the experiment starts, the entire process can be completed without the intervention of operators.

Claims

1. A slug flow and pseudo-slug flow intelligent generating device, comprising a gas phase passage, a liquid phase passage and an intelligent controller, wherein the two fluids are mixed and then pass through an experimental section and then enter a gas-liquid separator, characterized in that: The gas phase passage comprises an air compressor, a buffer tank and a gas phase regulating valve. The air compressor provides the gas phase, which enters the buffer tank through the gas phase switch valve, enters the experimental section after passing through a temperature transmitter, a pressure transmitter, a gas phase standard meter, a gas phase regulating valve and a gas phase three-way valve (10), and the third port of the gas phase three-way valve (10) is used for gas phase exhaust; the liquid phase passage comprises a liquid storage tank and a pump, the pump provides the liquid phase, which enters the experimental section after passing through a temperature transmitter, a pressure transmitter, a liquid phase standard meter, a liquid phase regulating valve and a liquid phase three-way valve in sequence, and the third port of the liquid phase three-way valve is used for liquid phase reflux; The intelligent controller includes an electrical input interface, an industrial computer for signal processing, and an electrical output interface; the electrical input interface is used to collect output values ​​of various transmitters and standard meters; after the industrial computer processes the information collected by the electrical input interface, it issues corresponding instructions through the electrical output interface; The instructions sent by the electrical output interface are used to control the opening of the gas phase regulating valve, the action of the gas phase three-way valve (10), the opening of the liquid phase regulating valve, the action of the liquid phase regulating valve and the action of the liquid phase three-way valve; the gas phase and the liquid phase form a slug flow and a pseudo-slug flow in the experimental section under the control of the intelligent controller; According to the different settings of the liquid plug cycle, it is divided into two modes: periodicity and randomness. The periodicity means that the duration of each liquid plug and the frequency of liquid plug, or the duration of gas plug and the frequency of gas plug are determined; while the randomness means that the duration of each liquid plug and the frequency of liquid plug or the duration of gas plug and the frequency of gas plug are adjustable; according to the different gas-liquid input modes, it is divided into three types: gas-liquid alternating input mode, gas-continuous liquid alternating input mode and liquid-continuous gas alternating input mode. The gas-liquid alternating input mode means that when the gas phase flows through the experimental section, the liquid phase bypasses back to the liquid storage tank; When the liquid phase flows through the experimental section, the gas phase is directly discharged from the bypass, and a slug flow is formed at this time; the gas-continuous-liquid alternating input mode means that the gas phase flows through the experimental section all the time without bypassing, while the liquid phase is alternately input to flow through the experimental section, and a pseudo-slug flow is formed at this time; the liquid-continuous-gas alternating input mode means that the liquid phase flows through the experimental section all the time without bypassing, while the gas phase is alternately input to flow through the experimental section, and a pseudo-slug flow is formed at this time; thus, there are six working modes, namely: "periodic slug flow gas-liquid alternating input mode", "periodic pseudo-slug flow gas-continuous liquid alternating input mode", "periodic pseudo-slug flow liquid-continuous gas alternating input mode", "random slug flow gas-liquid alternating input mode", "random pseudo-slug flow gas-continuous liquid alternating input mode", and "random pseudo-slug flow liquid-continuous gas alternating input mode".

2. The slug flow and pseudo-slug flow intelligent generating device according to claim 1, characterized in that: The control methods of each mode are as follows: (1) Periodic slug flow gas-liquid alternating input mode The gas phase flow rate and the liquid phase flow rate are set by the intelligent controller, the duration of the gas phase is set to t1, the duration of the liquid phase is set to t2, and the periodic plug flow gas-liquid alternating input mode is selected; after the start, the gas phase is switched to the experimental section through the gas phase three-way valve (10), and the liquid phase is switched to the bypass through the liquid phase three-way valve (20). At this time, the gas phase flows through the experimental section, and the liquid phase returns to the liquid storage tank through the bypass, and the duration is t1; After the waiting time reaches t1, the gas phase is switched to the bypass through the gas phase three-way valve (10), and the liquid phase is switched to the experimental section through the liquid phase three-way valve (20). At this time, the gas phase is emptied through the bypass, and the liquid phase flows through the experimental section, and the duration is t2; after the waiting time reaches t2, the gas phase is switched to the experimental section through the gas phase three-way valve (10), and the liquid phase is switched to the bypass through the liquid phase three-way valve (20). At this time, the gas phase flows through the experimental section, and the liquid phase returns to the liquid storage tank through the bypass, and the duration is t1; In this way, a slug flow with periodic alternating gas and liquid input is obtained at the experimental section, with the gas phase duration being t1 and the liquid phase duration being t2. (2) Periodic pseudo-slug flow gas-continuous liquid alternating input mode The gas phase flow rate and the liquid phase flow rate are set by the intelligent controller, the liquid plug interval time is set to t1, the liquid phase duration time is set to t2, and the periodic pseudo-slug flow gas continuous liquid alternating input mode is selected; after starting, the gas phase is switched to the experimental section through the gas phase three-way valve (10), and the liquid phase is switched to the bypass through the liquid phase three-way valve (20). At this time, the gas phase flows through the experimental section, and the liquid phase returns to the liquid storage tank through the bypass, and the duration is t1; After the waiting time reaches t1, the gas phase is still switched to the experimental section through the gas phase three-way valve (10), and the liquid phase is also switched to the experimental section through the liquid phase three-way valve (20). At this time, both the gas and liquid phases flow through the experimental section for a duration of t2; after the waiting time reaches t2, the gas phase is still switched to the experimental section through the gas phase three-way valve (10), and the liquid phase is switched to the bypass through the liquid phase three-way valve (20). At this time, the gas phase flows through the experimental section, and the liquid phase returns to the liquid storage tank through the bypass for a duration of t1; In this way, a pseudo-slug flow with periodic gas-liquid alternating input is obtained at the reciprocating experimental section, with a liquid plug interval time of t1 and a liquid phase duration of t2; (3) Periodic pseudo-slug flow liquid-continuous gas alternating input mode The gas phase flow rate and liquid phase flow rate are set by the intelligent controller, the gas plug interval time is set to t1, the gas phase duration time is set to t2, and the periodic pseudo-slug flow liquid continuous gas alternating input mode is selected; after starting, the liquid phase is switched to the experimental section through the liquid phase three-way valve (20), and the gas phase is switched to the bypass through the gas phase three-way valve (10). At this time, the liquid phase flows through the experimental section, and the gas phase is emptied through the bypass, and the duration is t1; after the timer reaches t1, the liquid phase is still switched to the experimental section through the liquid phase three-way valve (20), and the gas phase is switched to the bypass through the gas phase three-way valve (10). The gas phase three-way valve (10) is also switched to the experimental section, at which time both the gas and liquid phases flow through the experimental section for a duration of t2; after the timer reaches t2, the liquid phase is still switched to the experimental section through the liquid phase three-way valve (20), and the gas phase is switched to the bypass through the gas phase three-way valve (10), at which time the liquid phase flows through the experimental section and the gas phase is emptied through the bypass for a duration of t1; this cycle is repeated to obtain a pseudo-slug flow with a periodic liquid-continuous gas alternating input with a gas plug interval of t1 and a gas phase duration of t2 at the experimental section; (4) Random slug flow gas-liquid alternating input mode The gas phase flow rate and liquid phase flow rate are set through the intelligent controller, and the number of gas-liquid alternations is set; Then set the first duration of the gas phase t1, the first duration of the liquid phase t2, the second duration of the gas phase t3, the second duration of the liquid phase t4, the third duration of the gas phase t5, and the third duration of the liquid phase t6. The durations of each duration can be the same or different. Select a random slug flow gas-liquid alternating input mode. After starting, the gas phase is switched to the experimental section through the gas phase three-way valve (10), and the liquid phase is switched to the bypass through the liquid phase three-way valve (20). At this time, the gas phase flows through the experimental section, and the liquid phase returns to the liquid storage tank through the bypass, and the duration is t1. After the waiting time reaches t1, the gas phase is switched to the bypass through the gas phase three-way valve (10), and the liquid phase is switched to the experimental section through the liquid phase three-way valve (20). At this time, the gas phase is emptied through the bypass, and the liquid phase flows through the experimental section, and the duration is t2; after the waiting time reaches t2, the gas phase is switched to the experimental section through the gas phase three-way valve (10), and the liquid phase is switched to the bypass through the liquid phase three-way valve (20). At this time, the gas phase flows through the experimental section, and the liquid phase returns to the liquid storage tank through the bypass, and the duration is t3; after the waiting time reaches t3, the gas phase is switched to the bypass through the gas phase three-way valve (10), and the liquid phase is switched to the bypass through the liquid phase three-way valve ( 20) switches to the experimental section, at which time the gas phase is emptied through the bypass, and the liquid phase flows through the experimental section, and the duration is t4; after the waiting time reaches t4, the gas phase is switched to the experimental section through the gas phase three-way valve (10), and the liquid phase is switched to the bypass through the liquid phase three-way valve (20). At this time, the gas phase flows through the experimental section, and the liquid phase returns to the liquid storage tank through the bypass, and the duration is t5; after the waiting time reaches t5, the gas phase is switched to the bypass through the gas phase three-way valve (10), and the liquid phase is switched to the experimental section through the liquid phase three-way valve (20). At this time, the gas phase is emptied through the bypass, and the liquid phase flows through the experimental section, and the duration is t6; This cycle is repeated to obtain three random gas-liquid alternating slug flows at the experimental section. (5) Random pseudo-slug flow gas-continuous liquid alternating input mode The gas phase flow rate and liquid phase flow rate are set by the intelligent controller, and the number of times the liquid plug comes is set; then the time t1 of the first interval of the liquid plug, the time t2 of the first duration of the liquid phase, the time t3 of the second interval of the liquid plug, the time t4 of the second duration of the liquid phase, the time t5 of the third interval of the liquid plug, and the time t6 of the third duration of the liquid phase are set. The duration and interval time of each duration can be the same or different; a random pseudo-segment flow gas continuous liquid alternating input mode is selected; after starting, the gas phase is switched to the experimental section through the gas phase three-way valve (10), and the liquid phase is switched to the bypass through the liquid phase three-way valve (20). At this time, the gas phase flows through the experimental section, and the liquid phase returns to the liquid storage tank through the bypass, and the duration is t1; After the timing reaches t1, the gas phase is still switched to the experimental section through the gas phase three-way valve (10), and the liquid phase is also switched to the experimental section through the liquid phase three-way valve (20). At this time, both the gas and liquid phases flow through the experimental section, and the duration is t2; after the timing reaches t2, the gas phase is still switched to the experimental section through the gas phase three-way valve (10), and the liquid phase is switched to the bypass through the liquid phase three-way valve (20). At this time, the gas phase flows through the experimental section, and the liquid phase returns to the liquid storage tank through the bypass, and the duration is t3; after the timing reaches t3, the gas phase is still switched to the experimental section through the gas phase three-way valve (10), and the liquid phase is also switched to the experimental section through the liquid phase three-way valve (20). At this time, The gas and liquid phases both flow through the experimental section for a duration of t4; after the timing reaches t4, the gas phase is still switched to the experimental section through the gas phase three-way valve (10), and the liquid phase is switched to the bypass through the liquid phase three-way valve (20). At this time, the gas phase flows through the experimental section, and the liquid phase returns to the liquid storage tank through the bypass, and the duration is t5; after the timing reaches t5, the gas phase is still switched to the experimental section through the gas phase three-way valve (10), and the liquid phase is also switched to the experimental section through the liquid phase three-way valve (20). At this time, the gas and liquid phases both flow through the experimental section for a duration of t6; this cycle is repeated to obtain three pseudo-slug flows with random gas-liquid alternating inputs at the experimental section; (6) Random pseudo-slug flow liquid-continuous gas alternating input mode The gas phase flow rate Q m is set by the intelligent controller 3 / h and liquid flow rate W m 3 / h, set the number of times the gas plug comes; then set the time t1 of the first gas plug interval, the time t2 of the first gas phase duration, the time t3 of the second gas plug interval, the time t4 of the second gas phase duration, the time t5 of the third gas plug interval, and the time t6 of the third gas phase duration. The durations and intervals can be the same or different; select the random liquid-continuous-gas alternating input mode; after starting, the liquid phase is switched to the experimental section through the liquid phase three-way valve (20), and the gas phase is switched to the bypass through the gas phase three-way valve (10). At this time, the liquid phase flows through the experimental section and the gas phase is emptied through the bypass, and the duration is t1; after the timing reaches t1, the liquid phase is still switched to the experimental section through the liquid phase three-way valve (20), and the gas phase is also switched to the experimental section through the gas phase three-way valve (10). At this time, both the gas and liquid phases flow through the experimental section, and the duration is t2; after the timing reaches t2, the liquid phase is still switched to the experimental section through the liquid phase three-way valve (20). When switching to the experimental section, the gas phase is switched to the bypass through the gas phase three-way valve (10). At this time, the liquid phase flows through the experimental section and the gas phase is emptied through the bypass, which lasts for t3; after the timing reaches t3, the liquid phase is still switched to the experimental section through the three-way valve, and the gas phase is also switched to the experimental section through the gas phase three-way valve (10). At this time, both the gas and liquid phases flow through the experimental section, which lasts for t4; after the timing reaches t4, the liquid phase is still switched to the experimental section through the liquid phase three-way valve (20), and the gas phase is switched to the bypass through the gas phase three-way valve (10). At this time, the liquid phase flows through the experimental section and the gas phase is emptied through the bypass, which lasts for t5; after the timing reaches t5, the liquid phase is still switched to the experimental section through the liquid phase three-way valve (20), and the gas phase is also switched to the experimental section through the gas phase three-way valve (10). At this time, both the gas and liquid phases flow through the experimental section, which lasts for t6; this cycle can be repeated to obtain three pseudo-segment plug flows with random liquid-continuous gas alternating inputs at the experimental section.

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