Dual-chamber liquid reciprocating drive multiphase flow mixing transportation method and device thereof

Abstract

The present invention discloses a two-chamber liquid reciprocating drive multiphase flow mixing and transportation method and device. By using the vacuum suction chamber and compression discharge chamber formed alternately by two tanks as the suction chamber and discharge chamber of the multiphase flow mixing and transportation pump, after the gas in the liquid-gas mixture is separated in the tank, it is compressed by the liquid and discharged outside the tank. The power pump always operates under pure liquid conditions, eliminating the problem of the influence of high gas content on the pump. Using an ordinary water pump can achieve the mixed transportation of multiphase flow, and it can even operate continuously as a vacuum pump and compressor for pure gas, providing a new technical method and research and development direction for the field of multiphase flow mixing and transportation technology.

Description

Technical Field

[0001] The present invention belongs to the field of oil and gas mixed transportation and natural gas well boosting transportation devices in oilfield production, and particularly relates to a mixed transportation method and device for liquid, gas or liquid-gas multiphase flow in a mixed state. Background Art

[0002] The crude oil output is mainly a mixture of oil, water and gas, and also contains a small amount of sediment, which is a multiphase mixture. The traditional process of oil and gas production and transportation in oilfields is to separate oil, gas and water first, and then transport them separately by oil pumps, water pumps and compressors. This process has the disadvantages of complex technological process, large investment, difficult operation and maintenance, etc.

[0003] The multiphase flow mixed transportation technology is an efficient and economical pumping technology developed in recent years, and it is the development trend of oilfield production and transportation technology at home and abroad. It uses a multiphase flow mixed transportation pump to replace the liquid delivery pump and gas compressor, and simultaneously transports oil, gas and water containing sand through a pipeline. The multiphase flow mixed transportation pump is a device specifically used for transporting crude oil mixtures. Compared with the separation method, it does not require a special separation device, saves a pipeline process, and is especially suitable for long-distance transportation of crude oil mixtures. In the development of multiphase flow mixed transportation pump products in China, there are mainly mechanical rotary multiphase flow mixed transportation pumps such as screw pumps and sliding vane rotary pumps.

[0004] At present, the following technical problems generally exist in mechanical rotary multiphase flow mixed transportation pumps at home and abroad:

[0005] 1. Influence of high gas content on multiphase flow mixed transportation pumps:

[0006] Mechanical rotary multiphase flow mixed transportation pumps all belong to clearance seals. When transporting gas, some liquid is required to ensure the sealing, lubrication and cooling of the pump cavity. In the state of high gas content or slug flow, the multiphase flow mixed transportation pump will have a significant decrease in pump efficiency or even be unable to operate due to lack of liquid seal.

[0007] 2. Influence of high water content on multiphase flow mixed transportation pumps:

[0008] In multiphase flow, the mixing of oil, gas and water is not uniform. In the state of high water content, water will carry away the lubricating oil between the friction parts in the pump cavity, such as the parts between the rotor and the side plate, the screw and the nut, and the rotor bearing. Due to the lack of lubricating oil, the wear will be aggravated and sintering damage will occur in a short time.

[0009] 3. Dynamic sealing problem of multiphase flow mixed transportation pumps:

[0010] The biggest sealing problem of the multiphase flow mixed transportation pump lies in the dynamic seals for the shaft end and the shaft inside the pump chamber. It faces a multiphase sealing problem, not only the seals under pure liquid or pure gas conditions, but also the sealing problems under high-speed and variable-speed conditions. The sealing problem of the multiphase flow mixed transportation pump is an important issue in the design and research of multiphase flow mixed transportation pumps at home and abroad.

[0011] 4. Influence of load change on the multiphase flow mixed transportation pump:

[0012] The load and rotational speed of the mechanical rotary multiphase pump will change with the change of the medium flow pattern, and the high-speed rotating rotor exacerbates the gas-liquid separation, resulting in greater load changes, causing severe vibration and displacement of the transmission shaft, and even fracture. Summary of the Invention

[0013] The purpose of the present invention is to provide a dual-chamber liquid reciprocating drive multiphase flow mixed transportation method and device that drives the pump to always work under pure liquid conditions in view of the defects existing in the prior art, and realizes the transportation of liquid, gas or liquid-gas mixture.

[0014] The principle of the present invention is as follows: The power pump drives the liquid in the left tank and the right tank to reciprocate and circulate, so that the left tank and the right tank alternately form a vacuum suction chamber and a compression discharge chamber at the inlet and outlet ends of the power pump, realizing the continuous transportation of liquid, gas or liquid-gas mixture; the liquid level gauge transmits the liquid level signals of the left tank and the right tank to the data acquisition and control system; the data acquisition and control system controls the opening and closing of the solenoid valve group or the electromagnetic reversing valve according to the liquid level changes of the left tank and the right tank, and automatically switches the flow direction of the inlet and outlet of the power pump; the inlet check valves and outlet check valves on the left tank and the right tank are controlled by the pressure inside the left tank and the right tank, and automatically open and close to realize the continuous suction and discharge of the transported medium.

[0015] First of all, the present invention provides a technical solution for a dual-chamber liquid reciprocating drive multiphase flow mixed transportation device, which includes two forms: solenoid valve group commutation and electromagnetic reversing valve commutation, specifically as follows:

[0016] One is the technical solution of the dual-chamber liquid reciprocating drive multiphase flow mixed transportation device with solenoid valve group commutation as follows:

[0017] It includes a left tank, a right tank, a power pump, a data acquisition and control system, a solenoid valve group, a check valve group, and inlet and outlet manifolds; among them:

[0018] The upper parts of the left tank and the right tank are both provided with a medium inlet and a medium outlet, and the medium inlets are both connected to the inlet manifold through inlet check valves, and the medium outlets are both connected to the outlet manifold through outlet check valves;

[0019] The upper parts of the side walls of the left tank and the right tank are both provided with circulating liquid inlets, and the lower parts are both provided with circulating liquid outlets. An inlet solenoid valve is connected to each of the circulating liquid inlets, and an outlet solenoid valve is connected to each of the circulating liquid outlets. Branches are provided on the inlet pipeline of the power pump and are respectively connected to the outlet solenoid valves of the left tank and the right tank, and branches are provided on the outlet pipeline of the power pump and are respectively connected to the inlet solenoid valves of the left tank and the right tank.

[0020] Level gauges are installed on both the left tank and the right tank, and the level gauges are respectively connected to the data acquisition and control system through data lines. The data acquisition and control system is respectively connected to the inlet solenoid valve and the outlet solenoid valve through control lines.

[0021] Second, the technical solution of the double-chamber liquid reciprocating drive multiphase flow mixing and transportation device with electromagnetic directional valve commutation is as follows:

[0022] It includes a left tank, a right tank, a power pump, a data acquisition and control system, an electromagnetic directional valve, a check valve group, and inlet and outlet manifolds. Among them:

[0023] The upper parts of both the left tank and the right tank are provided with a medium inlet and a medium outlet. The medium inlets are respectively connected to the inlet manifold through inlet check valves, and the medium outlets are respectively connected to the outlet manifold through outlet check valves.

[0024] A circulating liquid inlet and outlet is provided on the side wall of each of the left tank and the right tank. The power pump is respectively connected to the circulating liquid inlet and outlet of the left tank and the right tank through the same electromagnetic directional valve.

[0025] Level gauges are installed on both the left tank and the right tank, and the level gauges are respectively connected to the data acquisition and control system through data lines. The data acquisition and control system is connected to the electromagnetic directional valve through a control line.

[0026] Further, in the electromagnetic directional valve commutation mode: the circulating liquid inlet and outlet of the left tank and the right tank are respectively connected to the A port and the B port of the electromagnetic directional valve, and the inlet and outlet of the power pump are respectively connected to the T port and the P port of the electromagnetic directional valve.

[0027] Further, in both the solenoid valve group commutation and the electromagnetic directional valve commutation modes:

[0028] Drain ports are provided at the bottoms of both the left tank and the right tank, and drain valves are installed on the drain ports.

[0029] The sensing ends of the level gauges are respectively connected to the liquid level detection ports at the lower parts of the left tank and the right tank, and the vent ends are respectively connected to the medium outlets at the upper parts of the left tank and the right tank.

[0030] Next, a method for transporting a liquid-gas mixed medium using the above-mentioned double-chamber liquid reciprocating drive multiphase flow mixing and transportation device is provided. Similarly, it also includes two forms: solenoid valve group commutation and electromagnetic directional valve commutation. Specifically as follows:

[0031] First, a method for transporting a liquid-gas mixed medium using a double-chamber liquid reciprocating drive multiphase flow mixing and transportation device with solenoid valve group commutation includes the following steps:

[0032] (1) Install the double-chamber liquid reciprocating drive multiphase flow mixing and transportation device in series on the fluid mixing and transportation pipeline through the inlet manifold and outlet manifold; the liquid-gas mixed medium flows into the left tank and right tank simultaneously through the inlet manifold, inlet check valve, and medium inlet in sequence; the gas in the left tank and right tank is discharged through the medium outlet, outlet check valve, and outlet manifold in sequence.

[0033] When the liquid levels in the left tank and right tank reach the preset upper dead point positions, the liquid level gauge transmits the liquid level signal to the data acquisition and control system. The data acquisition and control system issues a control command based on the liquid level signal: close the inlet solenoid valve on the left tank and the outlet solenoid valve on the right tank, and at the same time open the outlet solenoid valve on the left tank and the inlet solenoid valve on the right tank.

[0034] (3) Start the power pump. The liquid in the left tank is discharged into the right tank under the action of the power pump, and the entire mixing and transportation device is in the state of the left tank sucking and the right tank discharging.

[0035] Under the action of the negative pressure at the inlet of the power pump, the liquid level in the left tank begins to drop, a vacuum is formed in the upper part of the left tank, its inlet check valve opens and the outlet check valve closes, and the liquid-gas mixed medium is sucked into the left tank through the medium inlet. After the mixed medium enters the left tank, the liquid and gas are separated, the gas accumulates at the top of the left tank, and the liquid moves downward along with the liquid level. Under the action of the positive pressure at the outlet of the power pump, the liquid level in the right tank rises, its inlet check valve and outlet check valve open, and the liquid in the right tank is discharged into the outlet manifold through the medium outlet.

[0036] When the liquid level in the left tank drops to the preset lower dead point position, the liquid level gauge transmits the liquid level signal to the data acquisition and control system. The data acquisition and control system issues a control command based on the liquid level signal: close the outlet solenoid valve on the left tank and the inlet solenoid valve on the right tank, and at the same time open the inlet solenoid valve on the left tank and the outlet solenoid valve on the right tank.

[0037] (6) Under the action of the power pump, the liquid in the right tank is discharged into the left tank, and the entire mixing and transportation device is in the state of the left tank discharging and the right tank sucking.

[0038] (7) Under the action of the negative pressure at the inlet of the power pump, the liquid level in the right tank begins to drop, a vacuum is formed in the upper part of the right tank, its inlet check valve opens and the outlet check valve closes, and the liquid-gas mixed medium is sucked into the right tank through the medium inlet. After the mixed medium enters the right tank, the liquid and gas are separated, the gas accumulates at the top of the right tank, and the liquid moves downward along with the liquid level; under the action of the positive pressure at the outlet of the power pump, the liquid level in the left tank rises, its inlet check valve closes and the outlet check valve opens, and the gas and liquid in the left tank are discharged into the outlet header through the medium outlet.

[0039] (8) When the liquid level in the right tank drops to the preset lower stop position, the liquid level gauge transmits the liquid level signal to the data acquisition and control system. The data acquisition and control system issues a control instruction according to the liquid level signal: close the inlet solenoid valve on the left tank and the outlet solenoid valve on the right tank, and at the same time open the outlet solenoid valve on the left tank and the inlet solenoid valve on the right tank.

[0040] (9) Under the action of the power pump, the liquid in the left tank is discharged into the right tank; the entire multiphase flow mixing and transportation device is in the state of the left tank sucking and the right tank discharging again.

[0041] (10) Repeat the above actions, the liquid in the two tanks is reciprocally driven, the two tanks alternately suck and discharge, and the mixed transportation of liquid and gas is realized.

[0042] Second, a method for transporting a liquid-gas mixed medium by a double-chamber liquid reciprocating drive multiphase flow mixing and transportation device with electromagnetic directional valve commutation. The steps are the same as those of the electromagnetic valve group commutation method, and only the electromagnetic directional valve is used to replace the inlet solenoid valve and the outlet solenoid valve therein to realize the function of switching the flow direction of the inlet and outlet of the power pump.

[0043] Finally, a method for transporting a gas medium by using the above double-chamber liquid reciprocating drive multiphase flow mixing and transportation device is provided. Similarly, it also includes two forms: electromagnetic valve group commutation and electromagnetic directional valve commutation. The specific methods are as follows:

[0044] First, a method for transporting a gas medium by a double-chamber liquid reciprocating drive multiphase flow mixing and transportation device with electromagnetic valve group commutation includes the following steps:

[0045] (1) Install the inlet header and the outlet header of the double-chamber liquid reciprocating drive multiphase flow mixing and transportation device in series on the gas transportation pipeline. Pre-fill the left tank with circulating liquid and control the circulating liquid level in the right tank at the preset lower stop position.

[0046] (2) Issue a control instruction through the data acquisition and control system: close the inlet solenoid valve on the left tank and the outlet solenoid valve on the right tank, and at the same time open the outlet solenoid valve on the left tank and the inlet solenoid valve on the right tank.

[0047] (3) Start the power pump. Under the action of the power pump, the liquid in the left tank is discharged into the right tank, and the entire mixed transportation device is in a state of vacuum suction in the left tank and compression discharge in the right tank;

[0048] (4) Under the action of the negative pressure at the inlet of the power pump, the liquid level in the left tank begins to drop, a vacuum is formed in the upper part of the left tank, its inlet check valve opens and the outlet check valve closes, and the gas medium is sucked into the left tank through the medium inlet; Under the action of the positive pressure at the outlet of the power pump, the liquid level in the right tank rises, its inlet check valve closes and the outlet check valve opens, and the gas at the top of the right tank is compressed by the liquid level and discharged into the outlet header through the medium outlet;

[0049] (5) When the liquid level in the right tank reaches the preset upper dead point position, the gas at the top of the tank is compressed by the liquid level and completely discharged; At the same time, the liquid level in the left tank reaches the preset lower dead point position, and the top of the tank is filled with the sucked gas medium; The liquid level gauge transmits the liquid level signal to the data acquisition control system, and the data acquisition control system issues a control instruction according to the liquid level signal: close the outlet solenoid valve on the left tank and the inlet solenoid valve on the right tank, and at the same time open the inlet solenoid valve on the left tank and the outlet solenoid valve on the right tank;

[0050] (6) Under the action of the power pump, the liquid in the right tank is discharged into the left tank, and the entire mixed transportation device is in a state of compression discharge in the left tank and vacuum suction in the right tank;

[0051] (7) Under the action of the negative pressure at the inlet of the power pump, the liquid level in the right tank begins to drop, a vacuum is formed in the upper part of the right tank, its inlet check valve opens and the outlet check valve closes, and the gas medium is sucked into the right tank through the medium inlet and accumulates at the top of the right tank; Under the action of the positive pressure at the outlet of the power pump, the liquid level in the left tank rises, its inlet check valve closes and the outlet check valve opens, and the gas at the top of the left tank is compressed by the rising liquid and discharged into the outlet header through the medium outlet;

[0052] (8) When the liquid level in the left tank reaches the upper dead point position, the gas at the top of the tank is compressed by the liquid level and completely discharged; At the same time, the liquid level in the right tank reaches the lower dead point position, and the top of the tank is filled with the sucked gas medium. The liquid level gauge transmits the liquid level signal to the data acquisition control system, and the data acquisition control system issues a control instruction according to the liquid level signal: close the inlet solenoid valve on the left tank and the outlet solenoid valve on the right tank, and at the same time open the outlet solenoid valve on the left tank and the inlet solenoid valve on the right tank;

[0053] (9) The liquid in the left tank is discharged into the right tank under the action of the power pump, and the entire mixed transportation device is again in a state of vacuum suction in the left tank and compression discharge in the right tank;

[0054] (10) Repeat the above actions, the liquid in the two tanks is reciprocally driven, the two tanks are alternately in a state of vacuum suction and compression discharge, and the continuous transportation of the gas medium is realized.

[0055] Second, a method for transporting a gas medium by a dual-chamber liquid reciprocating drive multiphase flow mixing and transportation device with electromagnetic directional valves for commutation. The steps are the same as those of the method with solenoid valve groups for commutation, except that electromagnetic directional valves are used to replace the inlet solenoid valve and the outlet solenoid valve therein to achieve the function of switching the flow direction of the inlet and outlet of the power pump.

[0056] Compared with the prior art, the present invention has the following advantages:

[0057] (1) By utilizing the vacuum suction chamber and the compression discharge chamber alternately formed by two tanks as the suction chamber and the discharge chamber of the multiphase flow mixing and transportation pump, after the gas in the liquid-gas mixture is separated in the tank, it is compressed and discharged out of the tank by the liquid. The power pump always operates under a pure liquid condition, eliminating the problem of the influence of high gas content on the pump. An ordinary water pump can be used to achieve the mixed transportation of multiphase flow, and it can even operate continuously as a vacuum pump and a compressor for pure gas, providing a new technical method and research and development direction for the field of multiphase flow mixing and transportation technology.

[0058] (2) The structural principle is simple. The rising and falling liquid levels in the two tanks act as power pistons, there are no mechanical seal and lubrication problems, and an ordinary water pump can be used to drive the liquid level. There is no complex structure of a mechanical rotary multiphase flow mixing and transportation pump, solving the problem of the influence of high water content on the pump.

[0059] (3) The driving pump always operates under a pure liquid condition, and an ordinary mechanical seal can be used, solving the problem of multiphase sealing of the multiphase flow mixing and transportation pump.

[0060] (4) The driving pump always operates under a pure liquid condition, and there is no load change caused by the change of the medium flow state. Description of the Drawings

[0061] Figure 1 is a schematic structural diagram of the dual-chamber liquid reciprocating drive multiphase flow mixing and transportation device in Embodiment 1 of the present invention;

[0062] Figure 2 is a schematic structural diagram of the dual-chamber liquid reciprocating drive multiphase flow mixing and transportation device in Embodiment 2 of the present invention.

[0063] In the figure: 1. Left tank, 1-1 First circulating liquid inlet, 1-2 First circulating liquid outlet, 1-3 First medium inlet, 1-4 First medium outlet, 1-5 First liquid level detection port, 1-6 First sewage discharge port, 1-7 First inlet solenoid valve, 1-8 First outlet solenoid valve, 1-9 First inlet check valve, 1-10 First outlet check valve, 1-11 First sewage discharge valve, 1-12 First liquid level gauge, 1-13 First connecting pipe, 1-14 First circulating liquid inlet and outlet; 2. Right tank, 2-1 Second circulating liquid inlet, 2-2 Second circulating liquid outlet, 2-3 Second medium inlet, 2-4 Second medium outlet, 2-5 Second liquid level detection port, 2-6 Second sewage discharge port, 2-7 Second inlet solenoid valve, 2-8 Second outlet solenoid valve, 2-9 Second inlet check valve, 2-10 Second outlet check valve, 2-11 Second sewage discharge valve, 2-12 Second liquid level gauge, 2-13 Second connecting pipe, 2-14 Second circulating liquid inlet and outlet; 3. Power pump; 4. Data acquisition and control system; 5. Inlet manifold; 6. Outlet manifold; 7. Electromagnetic directional valve. Specific implementation method

[0064] Example 1

[0065] Refer to Figure 1 , a double-chamber liquid reciprocating drive multiphase flow mixing and transportation device, including a left tank 1, a right tank 2, a power pump 3, a data acquisition and control system 4, a solenoid valve group, a check valve group, and an inlet manifold 5 and an outlet manifold 6; among them:

[0066] The upper parts of the left tank 1 and the right tank 2 are both provided with a medium inlet and a medium outlet, namely the first medium inlet 1-3, the second medium inlet 2-3, the first medium outlet 1-4, and the second medium outlet 2-4; the first medium inlet 1-3 and the second medium inlet 2-3 are respectively connected to the inlet manifold 5 through the first inlet check valve 1-9 and the second inlet check valve 2-9; the first medium outlet 1-4 and the second medium outlet 2-4 are respectively connected to the outlet manifold 6 through the first outlet check valve 1-10 and the second outlet check valve 2-10.

[0067] The upper parts of the side walls of the left tank 1 and the right tank 2 are both provided with a circulating liquid inlet, and the lower parts are both provided with a circulating liquid outlet, namely the first circulating liquid inlet 1-1, the second circulating liquid inlet 2-1, the first circulating liquid outlet 1-2, and the second circulating liquid outlet 2-2; a first inlet solenoid valve 1-7 is connected to the first circulating liquid inlet 1-1, a first outlet solenoid valve 1-8 is connected to the first circulating liquid outlet 1-2, a second inlet solenoid valve 2-7 is connected to the second circulating liquid inlet 2-1, and a second outlet solenoid valve 2-8 is connected to the second circulating liquid outlet 2-2.

[0068] The inlet pipeline of the power pump 3 is provided with branches which are respectively connected to the first outlet solenoid valves 1-8 of the left tank 1 and the right tank 2, and the outlet pipeline of the power pump 3 is provided with branches which are respectively connected to the first inlet solenoid valves 1-7 and the second inlet solenoid valves 2-7 of the left tank 1 and the right tank 2.

[0069] A first liquid level gauge 1-12 and a second liquid level gauge 2-12 are respectively installed on the left tank and the right tank, and the first liquid level gauge 1-12 and the second liquid level gauge 2-12 are respectively connected to the data acquisition and control system 4 through two data lines; the data acquisition and control system is respectively connected to the first inlet solenoid valve 1-7, the second inlet solenoid valve 2-7, the first outlet solenoid valve 1-8 and the second outlet solenoid valve 2-8 through four control lines. That is, the data acquisition and control system controls the opening and closing of each solenoid valve through 4 control lines.

[0070] The above-mentioned double-chamber liquid reciprocating drive multiphase flow mixing and transportation device includes two working states, namely the multiphase flow mixing and transportation state of the liquid and gas mixed medium and the pure gas transportation state. The working processes are as follows:

[0071] 1. Multiphase flow mixing and transportation state of the liquid and gas mixed medium (function of the mixing and transportation pump):

[0072] See Figure 1 , the inlet header 5 and the outlet header 6 of the double-chamber liquid reciprocating drive multiphase flow mixing and transportation device are serially installed on the fluid mixing and transportation pipeline, and the liquid and gas mixed medium flows into the left tank 1 and the right tank 2 simultaneously through the inlet header 5, the inlet check valves (the first inlet check valve 1-9 and the second inlet check valve 2-9), and the medium inlets (the first medium inlet 1-3 and the second medium inlet 2-3). The gas in the left tank 1 and the right tank 2 is discharged through the medium outlets (the first medium outlet 1-4 and the second medium outlet 2-4), the outlet check valves (the first outlet check valve 1-10 and the second outlet check valve 2-10), and the outlet header 6.

[0073] When the liquid levels in the left tank 1 and the right tank 2 reach the top dead center position (the top of the tank body), the first liquid level gauge 1-12 and the second liquid level gauge 2-12 transmit the liquid level signals to the data acquisition and control system 4. Based on the liquid level signals, the data acquisition and control system 4 issues control instructions: the first outlet solenoid valve 1-8 and the second inlet solenoid valve 2-7 are opened, the first inlet solenoid valve 1-7 and the second outlet solenoid valve 2-8 are closed, and the power pump 3 is started. The liquid in the left tank 1 is discharged into the right tank 2 under the action of the power pump 3 through the first circulating liquid outlet 1-2, the first outlet solenoid valve 1-8, the power pump 3, the second inlet solenoid valve 2-7, and the second circulating liquid inlet 2-1. The double-chamber liquid reciprocating driving multiphase flow mixing and transportation device is in the state of sucking from the left tank 1 and discharging from the right tank 2. Under the action of the negative pressure at the inlet of the power pump 3, the liquid level in the left tank 1 begins to drop, a vacuum is formed in the upper part of the left tank 1, the first inlet check valve 1-9 is opened, the first outlet check valve 1-10 is closed, and the liquid-gas mixed medium is sucked into the left tank 1 through the first medium inlet 1-3. After the mixed medium enters the left tank 1, the liquid and gas are separated, the gas accumulates at the top of the left tank 1, and the liquid moves downward along with the liquid level. Under the action of the positive pressure at the outlet of the power pump 3, the liquid level in the right tank 2 rises, the second inlet check valve 2-9 is closed, the second outlet check valve 2-10 is opened, and the liquid in the right tank 2 is discharged into the outlet header 6 through the second medium outlet 2-4.

[0074] When the liquid level in the left tank 1 drops to the bottom dead center position (half of the tank body), the first liquid level gauge 1-12 transmits the liquid level signal to the data acquisition and control system 4. Based on the liquid level signal, the data acquisition and control system 4 issues control instructions: the first inlet solenoid valve 1-7 and the second outlet solenoid valve 2-8 are opened, the first outlet solenoid valve 1-8 and the second inlet solenoid valve 2-7 are closed. Under the action of the power pump 3, the liquid in the right tank 2 is discharged into the left tank 1 through the second circulating liquid outlet 2-2, the second outlet solenoid valve 2-8, the power pump 3, the first inlet solenoid valve 1-7, and the first circulating liquid inlet 1-1. The double-chamber liquid reciprocating driving multiphase flow mixing and transportation device is in the state of discharging from the left tank 1 and sucking from the right tank 2. Under the action of the negative pressure at the inlet of the power pump 3, the liquid level in the right tank 2 begins to drop, a vacuum is formed in the upper part of the right tank 2, the second inlet check valve 2-9 is opened, the second outlet check valve 2-10 is closed, and the liquid-gas mixed medium is sucked into the right tank 2 through the second medium inlet 2-3. After the mixed medium enters the right tank 2, the liquid and gas are separated, the gas accumulates at the top of the right tank 2, and the liquid moves downward along with the liquid level. Under the action of the positive pressure at the outlet of the power pump 3, the liquid level in the left tank 1 rises, the first inlet check valve 1-9 is closed, the first outlet check valve 1-10 is opened, and the gas and liquid in the left tank 1 are discharged into the outlet header 6 through the first medium outlet 1-4.

[0075] When the liquid level in the right tank 2 drops to the lower dead point position, the second liquid level gauge 2-12 transmits the liquid level signal to the data acquisition and control system 4. The data acquisition and control system 4 issues a control instruction based on the liquid level signal: the first outlet solenoid valve 1-8 and the second inlet solenoid valve 2-7 are opened, and the first inlet solenoid valve 1-7 and the second outlet solenoid valve 2-8 are closed. The liquid in the left tank 1 is discharged into the right tank 2 under the action of the power pump 3 through the first circulating liquid outlet 1-2, the first outlet solenoid valve 1-8, the power pump 3, the second inlet solenoid valve 2-7, and the second circulating liquid inlet 2-1. The double-chamber liquid reciprocating drive multiphase flow mixing and transportation device is in the state of the left tank 1 sucking and the right tank 2 discharging. By repeating the above actions, the liquid in the two tanks reciprocates, and the two tanks alternately suck and discharge, realizing the mixed transportation of liquid and gas.

[0076] 2. Pure gas transportation state: (functions of vacuum pump and compressor)

[0077] See Figure 1 , install the inlet manifold 5 and the outlet manifold 6 of the double-chamber liquid reciprocating drive multiphase flow mixing and transportation device in series on the gas transportation pipeline, and pre-fill the left tank 1 with circulating liquid, and the circulating liquid level in the right tank 2 is at the lower dead point.

[0078] Send a control instruction through the data acquisition and control system 4: open the first outlet solenoid valve 1-8 and the second inlet solenoid valve 2-7, and close the first inlet solenoid valve 1-7 and the second outlet solenoid valve 2-8, and start the power pump 3 to run. The liquid in the left tank 1 is discharged into the right tank 2 under the action of the power pump 3 through the first circulating liquid outlet 1-2, the first outlet solenoid valve 1-8, the power pump 3, the second inlet solenoid valve 2-7, and the second circulating liquid inlet 2-1. The double-chamber liquid reciprocating drive multiphase flow mixing and transportation device is in the state of the left tank 1 sucking in vacuum and the right tank 2 discharging under compression. Under the negative pressure at the inlet of the power pump 3, the liquid level in the left tank 1 begins to drop, a vacuum is formed in the upper part of the left tank 1, the first inlet check valve 1-9 opens, and the first outlet check valve 1-10 closes. The gas medium is sucked into the left tank 1 through the first medium inlet 1-3. Under the positive pressure at the outlet of the power pump 3, the liquid level in the right tank 2 rises, the second inlet check valve 2-9 closes, and the second outlet check valve 2-10 opens. The gas at the top of the right tank 2 is compressed by the liquid level and discharged into the outlet manifold 6 through the second medium outlet 2-4.

[0079] When the liquid level in the right tank 2 reaches the top dead center, the gas at the top of the tank is compressed by the liquid surface and completely discharged; the liquid level in the left tank 1 reaches the bottom dead center at the same time, and the top of the tank is filled with the sucked gas medium. The second liquid level gauge 2-12 transmits the liquid level signal to the data acquisition and control system 4. The data acquisition and control system 4 issues a control command according to the liquid level signal: the first inlet solenoid valve 1-7 and the second outlet solenoid valve 2-8 are opened, and the first outlet solenoid valve 1-8 and the second inlet solenoid valve 2-7 are closed. Under the action of the power pump 3, the liquid in the right tank 2 is discharged into the left tank 1 through the second circulating liquid outlet 2-2, the second outlet solenoid valve 2-8, the power pump 3, the first inlet solenoid valve 1-7, and the first circulating liquid inlet 1-1. The double-chamber liquid reciprocating drive multiphase flow mixing and transportation device is in the state of compression and discharge in the left tank 1 and vacuum suction in the right tank 2. Under the action of the negative pressure at the inlet of the power pump 3, the liquid level in the right tank 2 begins to drop, a vacuum is formed in the upper part of the right tank 2, the second inlet check valve 2-9 is opened, and the second outlet check valve 2-10 is closed. The gas medium is sucked into the right tank 2 through the second medium inlet 2-3 and accumulates at the top of the right tank 2; under the action of the positive pressure at the outlet of the power pump 3, the liquid level in the left tank 1 rises, the first inlet check valve 1-9 is closed, and the first outlet check valve 1-10 is opened. The gas at the top of the left tank 1 is compressed by the rising liquid and discharged into the outlet header 6 through the first medium outlet 1-4.

[0080] When the liquid level in the left tank 1 reaches the top dead center, the gas at the top of the tank is compressed by the liquid surface and completely discharged; the liquid level in the right tank 2 reaches the bottom dead center at the same time, and the top of the tank is filled with the sucked gas medium. The first liquid level gauge 1-12 transmits the liquid level signal to the data acquisition and control system 4. The data acquisition and control system 4 issues a control command according to the liquid level signal: the first outlet solenoid valve 1-8 and the second inlet solenoid valve 2-7 are opened, and the first inlet solenoid valve 1-7 and the second outlet solenoid valve 2-8 are closed. The liquid in the left tank 1 is discharged into the right tank 2 through the first circulating liquid outlet 1-2, the first outlet solenoid valve 1-8, the power pump 3, the second inlet solenoid valve 2-7, and the second circulating liquid inlet 2-1 under the action of the power pump 3. The double-chamber liquid reciprocating drive multiphase flow mixing and transportation device is in the state of vacuum suction in the left tank 1 and compression and discharge in the right tank 2. By repeating the above actions, the liquid in the two tanks reciprocates, and the two tanks alternately suck in vacuum and compress and discharge, realizing the continuous transportation of the gas medium.

[0081] Embodiment 2

[0082] Refer to Figure 2, a double-chamber liquid reciprocating drive multiphase flow mixing and transportation device. This device has basically the same structure as the mixing and transportation device in Embodiment 1, with the only difference being that the electromagnetic reversing valve 7 is used to replace the solenoid valve group in Embodiment 1, namely the first inlet solenoid valve 1-7, the first outlet solenoid valve 1-8, the second inlet solenoid valve 2-7, and the second outlet solenoid valve 2-8, to achieve the function of switching the inlet and outlet flow directions of the power pump 3. And because one electromagnetic reversing valve 7 is adopted, the first circulating liquid inlet 1-1, the first circulating liquid outlet 1-2, the second circulating liquid inlet 2-1, and the first circulating liquid outlet 1-2 on the left tank 1 and the right tank 2 are reduced from four ports to two ports, namely the first circulating liquid inlet and outlet 1-14 and the second circulating liquid inlet and outlet 2-14; among them, the first circulating liquid inlet and outlet 1-14 is connected to port A of the electromagnetic reversing valve 7; the second circulating liquid inlet and outlet 2-14 is connected to port B of the electromagnetic reversing valve 7; the inlet of the power pump 3 is connected to port T of the electromagnetic reversing valve 7, and the outlet of the power pump 3 is connected to port P of the electromagnetic reversing valve 7. The working state of the double-chamber liquid reciprocating drive multiphase flow mixing and transportation device in this embodiment is the same as that in Embodiment 1, with the only difference being the conversion of the commutation unit, that is, controlling the left and right commutation of the electromagnetic reversing valve 7 to automatically switch the inlet and outlet flow directions of the power pump 3; therefore, except for the change in the commutation method, the double-chamber liquid reciprocating drive multiphase flow mixing and transportation device and its operating state in this embodiment are the same as those in Embodiment 1, and will not be elaborated further.

[0083] As described above, these are only typical embodiments of the present invention. Those skilled in the art may all modify the present invention using the technical solutions described above or modify them into equivalent technical solutions. Therefore, any simple modification or equivalent replacement made according to the technical solutions of the present invention falls within the scope of protection required by the present invention.

Claims

1. A double-chamber liquid reciprocating drive multiphase flow mixing and transportation device, characterized in that, It includes a left tank, a right tank, a power pump, a data acquisition and control system, a solenoid valve group, a check valve group, an inlet manifold, and an outlet manifold. The inlet manifold and the outlet manifold are respectively installed in series on the fluid multiphase transportation pipeline. Among them: The upper parts of the left tank and the right tank are both provided with a medium inlet and a medium outlet. And the medium inlets are both connected to the inlet manifold through the inlet check valves of the check valve group, and the medium outlets are both connected to the outlet manifold through the outlet check valves of the check valve group. The upper parts of the side walls of the left tank and the right tank are both provided with a circulating liquid inlet, and the lower parts are both provided with a circulating liquid outlet. And the circulating liquid inlets are both connected with the inlet solenoid valves of the solenoid valve group, and the circulating liquid outlets are both connected with the outlet solenoid valves of the solenoid valve group. Branches are provided on the inlet pipeline of the power pump and are respectively connected to the outlet solenoid valves of the left tank and the right tank, and branches are provided on the outlet pipeline of the power pump and are respectively connected to the inlet solenoid valves of the left tank and the right tank. Level gauges are installed on both the left tank and the right tank, and the level gauges are respectively connected to the data acquisition and control system through data lines. The data acquisition and control system is respectively connected to the inlet solenoid valve and the outlet solenoid valve through control lines. The level gauges detect whether the liquid levels in the left tank and the right tank reach the upper dead point position and the lower dead point position respectively. The level gauges transmit the liquid level signals of the liquid levels in the left tank and the right tank reaching the upper dead point position and the lower dead point position to the data acquisition and control system. The data acquisition and control system issues control commands according to the liquid level signals to control the opening and closing of the solenoid valve group. Under the action of the power pump, the liquids in the left tank and the right tank are reciprocally driven between the left tank and the right tank through the circulating liquid inlet and the circulating liquid outlet. The left tank and the right tank alternately cycle for vacuum suction and compression discharge, realizing the multiphase flow transportation of the liquid and gas mixed medium.

2. Double-chamber liquid reciprocating drive multiphase flow mixing and transportation device, characterized in that, It includes a left tank, a right tank, a power pump, a data acquisition and control system, an electromagnetic directional valve, a check valve group, an inlet manifold, and an outlet manifold. The inlet manifold and the outlet manifold are respectively installed in series on the fluid multiphase transportation pipeline. Among them: The upper parts of the left tank and the right tank are both provided with a medium inlet and a medium outlet. And the medium inlets are both connected to the inlet manifold through the inlet check valves of the check valve group, and the medium outlets are both connected to the outlet manifold through the outlet check valves of the check valve group. One circulating liquid inlet and outlet is provided on the side wall of each of the left tank and the right tank. The power pump is respectively connected to the circulating liquid inlet and outlets of the left tank and the right tank through the same electromagnetic directional valve. Level gauges are installed on both the left tank and the right tank, and the level gauges are respectively connected to the data acquisition and control system through data lines; the data acquisition and control system is connected to the electromagnetic directional valve through a control line ； The level gauges detect whether the liquid levels in the left tank and the right tank reach the upper dead point position and the lower dead point position respectively. The level gauges transmit the liquid level signals of the liquid levels in the left tank and the right tank reaching the upper dead point position and the lower dead point position to the data acquisition and control system. The data acquisition and control system issues control instructions according to the liquid level signal to control the opening and closing of the electromagnetic directional valve. Under the action of the power pump, the liquids in the left tank and the right tank are reciprocally driven between the left tank and the right tank through the circulating liquid inlet and the circulating liquid outlet, and the left tank and the right tank alternately circulate for vacuum suction and compressed discharge, realizing the multiphase flow mixing and transportation of the liquid and gas mixed medium.

3. The dual-chamber liquid reciprocating drive multiphase flow mixing and transportation device according to claim 2, characterized in that, The circulating liquid inlets and outlets of the left tank and the right tank are respectively connected to the A port and the B port of the electromagnetic directional valve, and the inlet and outlet of the power pump are respectively connected to the T port and the P port of the electromagnetic directional valve.

4. The dual-chamber liquid reciprocating drive multiphase flow mixing and transportation device according to any one of claims 1-3, characterized in that, The bottoms of the left tank and the right tank are both provided with sewage outlets, and sewage valves are installed on the sewage outlets.

5. The dual-chamber liquid reciprocating drive multiphase flow mixing and transportation device according to any one of claims 1-3, characterized in that, The sensing ends of the liquid level gauges are respectively connected to the liquid level detection ports at the lower parts of the left tank and the right tank, and the ventilation ends are respectively connected to the medium outlets at the upper parts of the left tank and the right tank.

6. A method for transporting a liquid-gas mixed medium using the double-chamber liquid reciprocating drive multiphase flow mixing and transportation device according to claim 1, characterized in that, It includes the following steps: (1) Install the double-chamber liquid reciprocating drive multiphase flow mixing and transportation device in series on the fluid mixing and transportation pipeline through the inlet manifold and the outlet manifold; the liquid and gas mixed medium simultaneously flows into the left tank and the right tank through the inlet manifold, the inlet check valve and the medium inlet; the gases in the left tank and the right tank are discharged through the medium outlet, the outlet check valve and the outlet manifold in sequence. (2) When the liquid levels in the left tank and the right tank reach the preset upper dead point positions, the liquid level gauges transmit the liquid level signals to the data acquisition and control system, and the data acquisition and control system issues control instructions according to the liquid level signals: close the inlet electromagnetic valve on the left tank and the outlet electromagnetic valve on the right tank, and simultaneously open the outlet electromagnetic valve on the left tank and the inlet electromagnetic valve on the right tank. (3) Start the power pump, and the liquid in the left tank is discharged into the right tank under the action of the power pump, and the entire mixing and transportation device is in the state of the left tank sucking and the right tank discharging. (4) Under the action of the negative pressure at the inlet of the power pump, the liquid level in the left tank begins to drop, a vacuum is formed in the upper part of the left tank, the inlet check valve connected to the left tank opens, and the outlet check valve closes. The liquid and gas mixed medium is sucked into the left tank through the medium inlet of the left tank. After the liquid and gas mixed medium enters the left tank, the liquid and gas are separated. The gas accumulates at the top of the left tank, and the liquid moves downward along with the liquid level. Under the action of the positive pressure at the outlet of the power pump, the liquid level in the right tank rises, the inlet check valve and the outlet check valve connected to the right tank open, and the liquid in the right tank is discharged into the outlet manifold through the medium outlet of the right tank. (5) When the liquid level in the left tank drops to the preset lower dead point position, the liquid level gauges transmit the liquid level signals to the data acquisition and control system, and the data acquisition and control system issues control instructions according to the liquid level signals: close the outlet electromagnetic valve on the left tank and the inlet electromagnetic valve on the right tank, and simultaneously open the inlet electromagnetic valve on the left tank and the outlet electromagnetic valve on the right tank. (6) Under the action of the power pump, the liquid in the right tank is discharged into the left tank, and the entire mixing and transportation device is in the state of the left tank discharging and the right tank sucking. (7) Under the action of the negative pressure at the inlet of the power pump, the liquid level in the right tank begins to drop, a vacuum is formed in the upper part of the right tank, the inlet check valve connected to the right tank opens, and the outlet check valve closes. The liquid-gas mixed medium is sucked into the right tank through the medium inlet of the right tank. After the liquid-gas mixed medium enters the right tank, the liquid and gas are separated. The gas accumulates at the top of the right tank, and the liquid moves downward along with the liquid level. Under the action of the positive pressure at the outlet of the power pump, the liquid level in the left tank rises, the inlet check valve connected to the left tank closes, and the outlet check valve opens. The gas and liquid in the left tank are discharged into the outlet header through the medium outlet of the left tank. (8) When the liquid level in the right tank drops to the preset lower stop position, the liquid level gauge transmits the liquid level signal to the data acquisition and control system. The data acquisition and control system issues a control command according to the liquid level signal: close the inlet solenoid valve on the left tank and the outlet solenoid valve on the right tank, and at the same time open the outlet solenoid valve on the left tank and the inlet solenoid valve on the right tank. (9) Under the action of the power pump, the liquid in the left tank is discharged into the right tank; the entire mixed transportation device is in the state of the left tank sucking and the right tank discharging again. (10) Repeat the above steps, the liquid in the left and right tanks is reciprocally driven, the left and right tanks alternately suck and discharge, realizing the mixed transportation of liquid and gas.

7. A method for transporting a gas medium by using the double-chamber liquid reciprocating drive multiphase flow mixing and transporting device according to claim 1, characterized in that, It includes the following steps: (1) The inlet header and the outlet header of the double-chamber liquid reciprocating drive multiphase flow mixed transportation device are respectively connected in series to the gas transportation pipeline. The left tank is pre-filled with circulating liquid, and the circulating liquid level in the right tank is controlled to be at the preset lower stop position. (2) Issue a control command through the data acquisition and control system: close the inlet solenoid valve on the left tank and the outlet solenoid valve on the right tank, and at the same time open the outlet solenoid valve on the left tank and the inlet solenoid valve on the right tank. (3) Start the power pump. The liquid in the left tank is discharged into the right tank under the action of the power pump. The entire mixed transportation device is in the state of the left tank sucking in vacuum and the right tank discharging under compression. (4) Under the action of the negative pressure at the inlet of the power pump, the liquid level in the left tank begins to drop, a vacuum is formed in the upper part of the left tank, the inlet check valve connected to the left tank opens, and the outlet check valve closes. The gas medium is sucked into the left tank through the medium inlet of the left tank. Under the action of the positive pressure at the outlet of the power pump, the liquid level in the right tank rises, the inlet check valve connected to the right tank closes, and the outlet check valve opens. The gas at the top of the right tank is compressed by the liquid level and discharged into the outlet header through the medium outlet of the right tank. (5) When the liquid level in the right tank reaches the preset upper stop position, the gas at the top of the right tank is compressed by the liquid level and completely discharged; the liquid level in the left tank also reaches the preset lower stop position at the same time, and the top of the left tank is filled with the sucked gas medium. The liquid level gauge transmits the liquid level signal to the data acquisition and control system. The data acquisition and control system issues a control command according to the liquid level signal: close the outlet solenoid valve on the left tank and the inlet solenoid valve on the right tank, and at the same time open the inlet solenoid valve on the left tank and the outlet solenoid valve on the right tank. (6) Under the action of the power pump, the liquid in the right tank is discharged into the left tank, and the entire mixing and transportation device is in a state where the left tank is compressed and discharged, and the right tank is vacuum-sucked; (7) Under the action of the negative pressure at the inlet of the power pump, the liquid level in the right tank begins to drop, a vacuum is formed in the upper part of the right tank, the inlet check valve connected to the right tank opens, and the outlet check valve closes. The gas medium is sucked into the right tank through the medium inlet of the right tank and accumulates at the top of the right tank; under the action of the positive pressure at the outlet of the power pump, the liquid level in the left tank rises, the inlet check valve connected to the left tank closes, and the outlet check valve opens. The gas at the top of the left tank is compressed by the rising liquid and discharged into the outlet header through the medium outlet of the left tank. (8) When the liquid level in the left tank reaches the upper dead point position, the gas at the top of the left tank is compressed by the liquid surface and completely discharged; at the same time, the liquid level in the right tank reaches the lower dead point position, and the top of the right tank is filled with the sucked gas medium. The liquid level gauge transmits the liquid level signal to the data acquisition and control system. The data acquisition and control system issues a control instruction according to the liquid level signal: close the inlet solenoid valve on the left tank and the outlet solenoid valve on the right tank, and at the same time open the outlet solenoid valve on the left tank and the inlet solenoid valve on the right tank. (9) The liquid in the left tank is discharged into the right tank under the action of the power pump, and the entire mixing and transportation device is again in a state where the left tank is vacuum-sucked and the right tank is compressed and discharged. (10) Repeat the above steps, the liquid in the left tank and the right tank is reciprocally driven, the left tank and the right tank are alternately vacuum-sucked, compressed and discharged, realizing the continuous transportation of the gas medium.

8. A method for transporting a liquid-gas mixed medium using the double-chamber liquid reciprocating drive multiphase flow mixing and transportation device according to claim 2, characterized in that, The steps are the same as those in claim 6, only an electromagnetic reversing valve is used to replace the inlet solenoid valve and the outlet solenoid valve therein to realize the function of switching the flow direction of the inlet and outlet of the power pump.

9. A method for transporting a gas medium by using the double-chamber liquid reciprocating drive multiphase flow mixing and transporting device according to claim 2, characterized in that, The steps are the same as those in claim 7, only an electromagnetic reversing valve is used to replace the inlet solenoid valve and the outlet solenoid valve therein to realize the function of switching the flow direction of the inlet and outlet of the power pump.

10. A method for transporting a liquid and gas mixed medium by the double-chamber liquid reciprocating drive multiphase flow mixing and transporting device according to any one of claims 6 and 8, or a method for transporting a gas medium by the double-chamber liquid reciprocating drive multiphase flow mixing and transporting device according to any one of claims 7 and 9, characterized in that, The upper dead point position is located at the top of the tanks of the left tank and the right tank, and the lower dead point is located at half of the tanks of the left tank and the right tank.

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