CN110694500B - Pneumatic circulating oil-water two-phase flow equal-phase share flow distribution device - Google Patents

Abstract

The invention relates to a pneumatic circulating type oil-water two-phase flow equal-phase flow distribution device, which comprises an air inlet pipe, a water inlet pipe, an oil inlet pipe and a main circulating pipeline, wherein the air inlet pipe is connected with the water inlet pipe; the main circulating pipeline is of a structure like a Chinese character 'ri', the left side and the right side of the structure like the Chinese character 'ri' are respectively provided with a vertical ascending flow pipeline section and a vertical descending flow pipeline section, the middle part and the lower part are respectively provided with a gas-liquid stratified flow inclined descending pipeline section and an oil-water two-phase inclined return pipeline section, and the upper part is provided with a gas collecting pipe; the outlet end of the air inlet pipe is communicated with the middle lower part of the vertical ascending flow pipe section, the outlet ends of the water inlet pipe and the oil inlet pipe are connected to the air inlet pipe, the air collecting pipe is provided with an air outlet, the lowest end of the vertical ascending flow pipe section is connected with a liquid outlet, and the lower part of the vertical descending flow pipe section is provided with an oil-water two-phase flow distributor. The invention makes the oil-water two phases which are not mutually soluble circularly flow and fully mix in the main circulating pipeline, and distributes the circularly mixed oil-water two phases to each branch pipe of the pipe bundle according to the requirement of equal phase portion.

Description

Pneumatic circulating oil-water two-phase flow equal-phase share flow distribution device

technical field

The invention relates to a pneumatic circulating oil-water two-phase flow equal-phase share flow distribution device.

Background technique

The phase fraction of oil-water two-phase flow is one of the important parameters of oil-water two-phase flow. In some industries such as petrochemical industry and mechanical heavy industry, there are very high requirements for the distribution of the oil-water two-phase flow. The uniformity of the oil-water two-phase flow in different pipelines will affect the safety of downstream equipment operation. , efficiency, economy, etc. have a greater impact. In laboratory experiments involving oil-water two-phase flow in tube bundles or manifolds, a simple and reliable device is also required to ensure that the phase share of oil-water two-phase flow in each branch is equal.

SUMMARY OF THE INVENTION

In order to solve the problems existing in the above-mentioned background technology, the present invention proposes a pneumatic circulation type oil-water two-phase flow equal-phase flow distribution device, which uses the principle of pneumatic circulation to circulate the immiscible oil-water two-phase in the main circulation pipeline. Flow and mix thoroughly, and distribute the oil-water two phases after circulating mixing to each branch pipe of the tube bundle according to the requirement of equal phase proportion.

The technical scheme of the present invention to solve the above problem is: a pneumatic circulating oil-water two-phase flow equal-phase flow distribution device, and its special features are:

Including air inlet pipe, water inlet pipe, oil inlet pipe and main circulation pipe;

The main circulation pipeline is a "Sun"-shaped structure, the left and right sides of the "Sun"-shaped structure are respectively a vertical upward flow pipe section and a vertical descending flow pipe section, and the middle and lower parts of the "Sun"-shaped structure are gas-liquid respectively. The stratified flow inclined descending pipe section and the oil-water two-phase inclined return pipe section, the upper part of the "Sun"-shaped structure is the gas collecting pipe, and each inflection point in the main circulation pipe is connected;

The outlet end of the air inlet pipe is communicated with the middle and lower part of the vertical upward flow pipe section, the outlet ends of the water inlet pipe and the oil inlet pipe are all connected to the air inlet pipe, the air collecting pipe is provided with an exhaust port, and the lowermost end of the vertical upward flow pipe section is A liquid discharge port is connected, and an oil-water two-phase flow distributor is arranged at the lower part of the vertically descending flow pipe section;

The oil-water two-phase flow distributor is used to realize the equal-phase distribution output of the oil-water two-phase flow to the external tube bundle or the manifold;

There is a drain valve on the drain port.

Further, the above-mentioned intake pipe is horizontally connected to the middle and lower part of the vertical upward flow pipe section, the intake pipe is equipped with an intake regulating valve and an air flow single-phase valve, and the intake port of the intake pipe can be connected to an external high-pressure air source. Open the intake regulating valve, and the gas in the high-pressure gas source can enter the vertical upward flow pipe section of the main circulation pipeline through the intake pipe. The gas flow single-phase valve allows the gas to flow in only one direction, and also prevents the flow of oil and water to the gas source.

Further, the above-mentioned water inlet pipe is vertically connected to the air inlet pipe, the water inlet pipe is equipped with a water inlet regulating valve and a water flow single-phase valve, and the water inlet of the water inlet pipe can be connected with an external water pipe. Open the water inlet regulating valve, the water can first flow into the air inlet pipe through the water inlet pipe and then enter the vertical upward flow pipe section of the main circulation pipe. The water flow single-phase valve allows water to flow in only one direction in the water inlet pipe, and can also prevent oil and gas from flowing into the water inlet pipe.

Further, the above-mentioned oil inlet pipe is vertically connected to the air inlet pipe, the oil inlet pipe is equipped with an oil inlet regulating valve and an oil flow single-phase valve, and the oil inlet of the oil inlet pipe can be connected with an external oil pipe. Open the oil inlet regulating valve, the oil can first flow into the air inlet pipe through the oil inlet pipe and then enter the vertical upward flow pipe section of the main circulation pipe. The oil flow single-phase valve allows oil to flow in only one direction in the oil inlet pipe, and also prevents water and gas from flowing into the oil inlet pipe.

Further, the above-mentioned gas collecting pipe is equipped with a pressure setting device, which can adjust the pressure in the main circulation pipeline, and discharge the gas in the gas collecting pipe under a certain pressure through the exhaust port of the gas collecting pipe.

Further, a plurality of distribution holes are evenly distributed on the periphery of the above-mentioned oil-water two-phase flow distributor, and the distribution holes are used for connection with an external tube bundle or a manifold.

Advantages of the present invention:

The invention adopts the pneumatic method, the high-pressure gas drives the oil-water two-phase flow in the pipeline to circulate and fully mix, and provides pressure to make the oil-water two-phase flow pass through the distributor to the external tube bundle or manifold to distribute and output the oil-water two-phase flow, so that each The phase share of the oil-water two-phase flow in the branch pipe is equal; the principle of the invention is easy to understand, the structure is simple, and the operation is convenient, and the cost of the equal-phase share distribution of the oil-water two-phase flow can be greatly saved.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the implementation schematic diagram of the present invention;

3 is a schematic cross-sectional view of an oil-water two-phase flow distributor.

Among them, 1. Air inlet, 2. Exhaust port, 3. Liquid discharge port, 4. Water delivery port, 5. Oil delivery port, 6. Oil-water two-phase flow distributor, 7. Vertical rising flow pipe section, 8 , Gas-liquid stratified flow inclined descending pipe section, 9. Vertical descending flow pipe section, 10. Oil-water two-phase inclined return pipe section, 11. Gas collecting pipe, 12. Oil inlet pipe, 13. Water inlet pipe, 14. Intake regulating valve, 15 , Air flow check valve, 16, Liquid drain valve, 17, Pressure setter, 18, Oil inlet control valve, 19, Water inlet control valve, 20, Water flow check valve, 21, Oil flow check valve, 22, Air intake pipe; 61. Main structure; 62. Distribution hole.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1 and 2, a pneumatic circulating oil-water two-phase flow equal-phase flow distribution device includes an air inlet pipe 22, a water inlet pipe 13, an oil inlet pipe 12 and a main circulation pipe.

The main circulation pipeline is a "Sun"-shaped structure, and the left and right sides of the "Sun"-shaped structure are respectively a vertical rising flow pipe section 7 and a vertical descending flow pipe section 9, and the middle and the lower part of the "Sun"-shaped structure are respectively. The gas-liquid stratified flow inclined descending pipe section 8, the oil-water two-phase inclined return pipe section 10, the upper part of the "Sun"-shaped structure is the gas collecting pipe 11, and each inflection point in the main circulation pipe is connected.

The outlet end of the air inlet pipe 22 is communicated with the middle and lower part of the vertical upward flow pipe section 7, the outlet ends of the water inlet pipe 13 and the oil inlet pipe 12 are connected to the air inlet pipe 22, and the air collecting pipe 11 is provided with an exhaust port 2, which is vertically arranged. The lowermost end of the straight upward flow pipe section 7 is connected with the liquid discharge port 3, and the lower part of the vertical downward flow pipe section 9 is provided with an oil-water two-phase flow distributor 6; Realize the equal-phase distribution output of the oil-water two-phase flow;

Referring to FIG. 3 , the main structure 61 of the oil-water two-phase flow distribution 6 is a short cylinder, the upper and lower ends of which are concentrically connected to the vertically descending flow pipe section 9 . A plurality of distribution holes 62 are evenly distributed on the side wall of the short cylinder, and the distribution holes 62 are used for connection with external tube bundles or multiple pipes.

Preferably, the intake pipe 22 is horizontally connected to the middle and lower part of the vertical upward flow pipe section 7, the intake pipe 22 is provided with an intake regulating valve 14 and an airflow single-phase valve 15, and the intake port 1 of the intake pipe 22 can be connected to an external high-pressure air source. connect. Open the intake regulating valve 14, and the gas in the high-pressure gas source can enter the vertical upward flow pipe section 7 of the main circulation pipeline through the intake pipe 22. The gas flow single-phase valve 15 can only flow the gas in one direction, and can also prevent the flow of oil and water to the gas source.

Preferably, the water inlet pipe 13 is vertically connected to the air inlet pipe 22, the water inlet pipe 13 is provided with a water inlet regulating valve 19 and a water flow single-phase valve 20, and the water inlet 4 of the water inlet pipe 13 can be connected to an external water pipe. When the water inlet regulating valve 19 is opened, the water can first flow into the air inlet pipe 22 through the water inlet pipe 13 and then enter the vertical upward flow pipe section 7 of the main circulation pipe. The water flow single-phase valve 20 allows water to flow in only one direction in the water inlet pipe, and can also prevent oil and gas from flowing into the water inlet pipe.

Preferably, the oil inlet pipe 12 is vertically connected to the air inlet pipe 22, the oil inlet pipe 12 is provided with an oil inlet regulating valve 18 and an oil flow single-phase valve 21, and the oil inlet 5 of the oil inlet pipe 12 can be connected to an external oil pipe. When the oil inlet regulating valve 18 is opened, the oil can first flow into the air inlet pipe 22 through the oil inlet pipe 12 and then enter the vertical ascending flow pipe section 7 of the main circulation pipe. The oil flow single-phase valve 21 allows oil to flow in only one direction in the oil inlet pipe, and can also prevent water and gas from flowing into the oil inlet pipe.

Preferably, the gas collecting pipe 11 is vertically connected above the main circulation pipeline, and the pressure setting device 17 is installed on the gas collecting pipe 11, which can adjust the pressure in the main circulation pipe, and through the exhaust port 2 of the gas collecting pipe 11, the pressure setting device 17 is installed in the gas collecting pipe. The gas is discharged under a certain pressure.

In the present invention, the phase proportions of oil and water in the main circulation pipeline can be maintained at the required value by adjusting the flow of oil and water. After the three-phase oil, gas and water enter the main circulation pipeline through the air inlet pipe, the water inlet pipe and the oil inlet pipe respectively, the three-phase fluid presents an upward flow of oil, gas and water in the vertical upward flow pipe section of the main circulation pipe under the driving of the gas. At the interface between the vertical ascending flow pipe section 7 and the gas-liquid stratified flow inclined descending pipe section 8, part of the gas enters the gas collecting pipe 11 . The remaining gas is separated from the liquid in the gas-liquid stratified flow inclined descending pipe section 8, and enters the gas collector at the interface of the gas-liquid stratified flow inclined descending pipe section 8 and the vertical descending flow pipe section 9.

In the present invention, by adjusting the intake air flow rate, the return flow rate in the oil-water two-phase inclined return pipe section 10 can be made larger than the flow rate distributed and output by the oil-water two-phase flow distributor 6 to the external tube bundle or manifold, so as to ensure sufficient mixing of the oil-water two-phase. .

In the present invention, by adjusting the water inlet flow, oil inlet flow and the distribution output flow of the oil-water two-phase, the liquid level in the vertical descending flow pipe section 9 can be located in the oil-water two-phase flow distributor 6 and the gas-liquid stratified flow is inclined downward. Between the pipe sections 8, the reasonable operation of the pneumatic circulating oil-water two-phase flow equal-phase flow distribution device is ensured.

In the present invention, after the oil-water two-phase is fully circulated and mixed in the main circulation pipeline, the oil-water two-phase flow distributor 6 realizes the equal-phase distribution and output of the oil-water two-phase flow to the external tube bundle or manifold.

Embodiments of the present invention include the following steps:

1) First, open the oil inlet regulating valve 18, the water inlet regulating valve 19 and the pressure setting device 17, and respectively fill a certain amount of oil and water into the pipeline through the oil delivery port 5 and the water delivery port 4, so that the oil inlet pipe 12, The liquid level of the liquid in the water inlet pipe 13 and the vertical ascending flow pipe section 7 is close to the junction of the vertical ascending flow pipe section 7 and the gas-liquid stratified flow inclined descending pipe section 8 . Close the oil delivery valve 18, the water delivery valve 19 and the pressure setting device 17;

2) Then, open the intake regulating valve 14, and adjust the pressure setting device 17, so that the high-pressure gas enters the pipeline from the intake port 1, and forms a three-phase flow of oil, water and gas in the vertical upward flow pipe section 7, and drives the oil and water two. Phase flow circulates. Among them, the gas is separated from the three-phase flow at the junction of the vertical ascending flow pipe section 7, the gas-liquid stratified flow inclined descending pipe section 8 and the gas collecting pipe 11, and is separated from the three-phase flow into the gas collecting pipe 11, and finally discharged from the exhaust port 2;

3) After waiting for a period of time, after the oil-water two-phase flow is fully mixed, the oil-water two-phase flow distributor 6 can be opened. In the device, the high pressure controlled by the pressure setting device 17 drives the fully mixed oil-water two-phase flow into the oil-water two-phase flow distributor 6, and realizes the oil-water two-phase flow in each branch pipe connected with the oil-water two-phase flow distributor 6. Phase share allocation;

4) After the operation, close the intake regulating valve 14, the oil intake regulating valve 18 and the water intake regulating valve 19, and open the drain valve 16, at this time, the remaining liquid can be discharged from the liquid outlet 3. It is also possible to close the drain valve 16, open the oil inlet regulating valve 18 and the water inlet regulating valve 19, replenish the two phases of oil and water, repeat the above steps, and continue the operation.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Those skilled in the art can still adjust the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. . Therefore, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (4)

1. A pneumatic circulating type oil-water two-phase flow equal-phase flow distribution device is characterized in that:

comprises an air inlet pipe (22), a water inlet pipe (13), an oil inlet pipe (12) and a main circulating pipeline;

the main circulating pipeline is of a structure in a shape like a Chinese character 'ri', the left side and the right side of the structure in the shape like the Chinese character 'ri' are respectively provided with a vertical ascending flowing pipe section (7) and a vertical descending flowing pipe section (9), the middle part and the lower part of the structure in the shape like the Chinese character 'ri' are respectively provided with a gas-liquid layered flow inclined descending pipe section (8) and an oil-water two-phase inclined backflow pipe section (10), the upper part of the structure in the shape like the Chinese character 'ri' is provided with a gas collecting pipe (11), and;

the outlet end of the air inlet pipe (22) is communicated with the middle lower part of the vertical ascending flow pipe section (7), the outlet ends of the water inlet pipe (13) and the oil inlet pipe (12) are connected onto the air inlet pipe (22), the air collecting pipe (11) is provided with an air outlet (2), the lowest end of the vertical ascending flow pipe section (7) is connected with a liquid outlet (3), and the lower part of the vertical descending flow pipe section (9) is provided with an oil-water two-phase flow distributor (6);

the oil-water two-phase flow distributor (6) is used for realizing equal-phase share distribution output of oil-water two-phase flow to an external pipe bundle or a manifold;

a liquid dredging valve (16) is arranged on the liquid outlet (3);

the gas collecting pipe (11) is provided with a pressure valuator (17) for adjusting the pressure in the main circulation pipeline;

the oil-water two-phase flow distributor (6) comprises a main body structure (61), wherein the main body structure is a short cylinder, and the upper end and the lower end of the main body structure are concentrically connected with a vertical descending flow pipe section (9); a plurality of distribution holes (62) are uniformly distributed on the side wall of the short cylinder;

the inner diameter of the main structure is larger than that of the vertical descending flow pipe section (9).

2. The pneumatic circulating oil-water two-phase flow equal-phase-share flow distribution device as claimed in claim 1, wherein:

the air inlet pipe (22) is horizontally connected to the middle lower part of the vertical ascending flow pipe section (7), and an air inlet adjusting valve (14) and an air flow single-phase valve (15) are arranged on the air inlet pipe (22).

3. A pneumatic circulation type oil-water two-phase flow equal-phase-portion flow distribution device according to claim 2, characterized in that:

the water inlet pipe (13) is vertically connected to the air inlet pipe (22), and the water inlet adjusting valve (19) and the water flow single-phase valve (20) are installed on the water inlet pipe (13).

4. A pneumatic circulating oil-water two-phase flow equal-phase-share flow distribution device according to any one of claims 1 to 3, characterized in that:

the oil inlet pipe (12) is vertically connected to the air inlet pipe (22), and the oil inlet adjusting valve (18) and the oil flow single-phase valve (21) are arranged on the oil inlet pipe (12).

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