RU227352U1 - Three-phase separator input device - Google Patents

Abstract

The inlet device of a three-phase separator relates to the oil industry, in particular to the field of separation of gas-liquid mixtures and can be used for preliminary oil preparation and purification of associated formation waters. The inlet device of the three-phase separator contains an inlet pipe for introducing the gas-oil mixture and a perforated tubular distributor for introducing the gas-oil mixture, upper and lower baffles. The inlet pipe for introducing the gas-oil mixture is made in the form of two elbows located above each other, connected by a pipe, the outlet of the lower elbow is connected to a tubular distributor equipped with longitudinal double-sided perforation and an end plug, on the upper part of the tubular distributor the inner surface of the upper bumper, made in the form of a longitudinally truncated pipes with a larger diameter than the tubular distributor. The upper bumper is equipped with longitudinal double-sided perforation and is installed with the open part downwards; a lower bumper is attached to the lower edges of the upper bumper, made in the form of a longitudinally truncated pipe, the diameter of which is larger than the diameter of the upper bumper, and the lower bumper is installed with the open part up. The elbows of the inlet pipe can be located in the same plane or rotated relative to each other. Double-sided perforation of the tubular distributor is made in the middle and lower part of the pipe. A flange is installed at the end of the upper bend. The inlet device of a three-phase separator provides a significant increase in separation efficiency, achieved by sequentially passing the gas-oil mixture through several successive stages with different effects on the flow and a stepwise reduction in pressure in the flow. 4 salary f-ly, 3 ill.

Description

The utility model relates to devices for separating gas-liquid mixtures and can be used, in particular, in the oil industry for preliminary oil preparation and treatment of reservoir wastewater.

Known three-phase separator TFS-1 (Internet, Triptonkosti.ru), in which the inlet device is made in the form of a horizontal oil emulsion inlet fitting equipped with longitudinal perforation.

The disadvantages of the TFS-1 three-phase separator include the low efficiency of separation of the gas-liquid mixture flow. The disadvantages of the inlet device of a three-phase separator in the form of an inlet fitting equipped with longitudinal perforation include the fact that it only performs the function of supplying the mixture to be separated into the media separation zone, and does not carry out the function of intensifying the separation of media, any actions on the gas liquid flow, which does not contribute intensification of media separation.

Thus, this technical solution of the input device only provides the supply of the mixture to be separated into the media separation zone, but does not intensify the separation of media in a wide range of regimes of the flow entering the separator.

A three-phase separator is known (RF Patent No. 204076 , IPC B01D 17/028, B01D 17/04, publ. 05/05/2021), in which the input device is made in the form of a gas-liquid mixture input fitting located in the lower end part of the housing, with on the outside of the housing, the fitting is connected to the gas-liquid mixture input pipeline; above the mixture input fitting in the vertical plane there is an additional gas input fitting connected on the outside of the housing to one end of the gas input pipeline, made in a vertical plane parallel to the gas-liquid mixture input pipeline, and the other end is connected with the gas-liquid mixture input pipeline, the gas-liquid mixture and gas input pipelines are connected by vertical pipe gas outlets, a flow straightener is additionally installed between the mixture input fitting and the first jumper on the mixture supply pipeline, inside the housing the gas-liquid mixture and gas input pipelines are placed parallel to each other in a vertical plane and are made on ends with horizontal holes located in the horizontal and vertical planes.

The disadvantages of the input device of the known three-phase separator include the low efficiency of separation of the gas-liquid mixture flow. Preliminary selection of free gas (released in the pipeline) reduces the energy of the liquid flow, so the liquid flow, together with the remaining dissolved gas, will exit predominantly from the perforations of the pipeline 10 in all directions, creating a seething in the GLS input area, which promotes the removal of water into the oil layer and the formation of an emulsion . It is assumed that after the flow straightener in the liquid inlet pipe, the flow will be divided into three phases - heavy, light and gas. Gas should exit predominantly through the upper perforation, the heavy fraction through the lower perforation. However, the flow straightener only evens out the flow of liquid; its separation in the pipe requires time and certain conditions. For example, gas is well separated from liquid in a turbulent flow, but in a laminar flow dissolved gas will be released with much less intensity. The separation of the emulsion into heavy and light fractions in a laminar flow occurs due to gravitational forces, however, without intensification devices (for example coalescers) it is a long process, and in pipe 10 separation most likely will not occur due to lack of time. The flow of liquid with residual dissolved gas, due to the force of inertia, will create increased pressure in the liquid inlet pipe, which will push the liquid in all directions of the perforation. As a result, the downward flow of liquid will displace the heavy fraction, which, together with the flows flowing to the sides, will rush into the zone of low pressure created near the pipe by the upward flow. This will create the effect of seething and the removal of the heavy fraction into the interphase layer and the layer of the light fraction.

The presented technical solution for the input device of a three-phase separator intensifies the separation of media in this device, but due to the intensive mixing that occurs at the output of the input device, the results of this separation are significantly leveled.

The closest to the claimed input device of a three-phase separator is the three-phase separator adopted as a prototype (RF patent No. 2033237, IPC D01D 17/00, publ. 04/20/1995), in which the inlet device is made in the form of a hydrocyclone that intensifies the separation of the mixture, connected in parallel and in series to the inlet pipe for introducing the gas-oil mixture into the separator by a perforated tubular distributor located in the emulsion layer.

The disadvantages of the prototype input device include the low efficiency of intensifying the separation of the liquid mixture into light and heavy phases when the productivity limits of the input flow entering the hydrocyclone are reduced or exceeded. As is known, hydrocyclones operate effectively within a narrow performance range. When the inlet flow performance is above or below the limit values, the efficiency of the hydrocyclone drops sharply, which leads to the need to replace it. A perforated tubular distributor placed in the emulsion layer performs only the function of supplying the mixture to be separated into the media separation zone; it does not carry out the function of intensifying the separation of media (no actions are performed on the gas liquid flow) and does not provide intensification of media separation.

The presented technical solution intensifies the separation of media (water and oil) not in a wide range of flow regimes entering the separator, but only in a narrow range of flow rates (which is not ensured during actual operation of separators).

The technical result to be achieved by the claimed utility model is to increase the efficiency of separation of the gas-liquid mixture flow by organizing a number of stages of influence on the input flow. At the same time, the design of the inlet device, due to different levels of pressure in the flow, centrifugal forces, friction forces, gravitational forces, and inertial forces at each stage, allows for higher intensity and efficiency of separation of the gas-oil mixture.

The specified technical result is achieved by that in the inlet device of a three-phase separator, containing an inlet pipe for introducing a gas-oil mixture and a perforated tubular distributor for introducing a gas-oil mixture, upper and lower bumpers are additionally installed, the inlet pipe for introducing a gas-oil mixture is made in the form of two elbows located one above the other, connected by a pipe, the outlet of the lower elbow is connected with a perforated tubular distributor equipped with an end cap; on the upper part of the perforated tubular distributor, the inner surface of the upper bumper is fixed, made in the form of a longitudinally truncated pipe of a larger diameter than the tubular distributor, while the upper bumper is equipped with longitudinal double-sided perforation and is installed with the open part downward, towards the lower Attached to the edges of the upper bumper is a lower bumper, made in the form of a longitudinally truncated pipe, the diameter of which is larger than the diameter of the upper bumper, and the lower bumper is installed with the open part up.

It is optimal to place the input pipe in the inlet device of a three-phase separator in the same plane.

It is preferable that in the inlet device of a three-phase separator, the inlet pipes are rotated relative to each other.

It is advisable to make the perforated tubular distributor with double-sided perforation in the middle and lower part of the pipe.

It is preferable to install a flange in the input device of the three-phase separator at the end of the upper elbow.

The essence of the utility model is illustrated by drawings, where

Figure 1 shows the input device of a three-phase separator in three projections - a), b) c);

in fig. 2 shows a 3D image of the input device;

in fig. Figure 3 schematically shows the location of the input device in a three-phase separator.

The inlet device of a three-phase separator contains (Fig. 1, 2) an inlet pipe for introducing a gas-oil mixture, made in the form of two elbows 10 located one above the other, upper and lower, connected by pipe 6. Elbows 10 can be placed in the same plane or rotated relative to each other, which ensures more intense gas separation and separation of water and oil droplets. A flange 11 is attached to the inlet of the upper elbow 10 for connection with the inlet pipe for supplying the gas-oil mixture (not shown in the drawings). The outlet of the lower elbow 10 is connected to the input of a perforated tubular distributor 7, equipped with an end cap 5 (Fig. 1 b) and double-sided longitudinal perforations 9, 8 (Fig. 2), made respectively in the middle and lower parts of the tubular distributor 7 (Fig. 2 ).

On the upper part of the perforated tubular distributor 7, with the help of gussets 4 (Fig. 1 b), the inner surface of the upper bumper 1, made in the form of a longitudinally truncated pipe of a larger diameter than the tubular distributor 7, is fixed.

The upper bumper 1 is equipped with longitudinal double-sided perforation 18 (Fig. 2) and is installed with the open part downwards; the lower bumper 2, made in the form of a longitudinally truncated pipe, the diameter of which is larger than the diameter of the upper bumper 1, is attached to the lower edges of the upper bumper 1 using gussets 3 , and the lower bumper 2 is installed with the open part up.

The inlet device of the three-phase separator is located in the lower part of the separator housing 12 (Fig. 3) coaxially with the housing 12. On the upper inner surface of the separator housing 12, a drop eliminator 13 is installed, connected through a valve 14 to the gas outlet pipe 15. To the lower surface of the separator housing 12 in front of the partition 21, a water outlet pipe is connected through pipe 20 and valve 19 (Fig. 3). An oil outlet pipe is connected to the lower surface of the separator body 12 behind the partition 21 through pipe 16 and valve 17 (Fig. 3).

The operation of the input device of a three-phase separator is carried out as follows.

The claimed technical result is achieved through the sequential passage of a gas-oil mixture through several units and elements with different effects on the flow and a gradual decrease in pressure in the flow:

- two elbows 10, changing the direction of flow for the first stage of separation (partial separation of gas and liquid by intensifying gas separation and coagulation of water and oil droplets due to inertial forces, centrifugal forces and friction in elbows 10 and pipe 6 with a gradual decrease in pressure along the flow relative to input stream;

- a perforated tubular distributor 7, plugged at the end with a plug 5, providing the next stage of separation at a pressure significantly lower than the pressure at the inlet to the device;

- upper baffle 1 for the next stage of internal separation (at even lower pressure) due to the forces of inertia, gravity and centrifugal forces and subsequent primary removal of the flow with a high gas content through the perforation in the upper part of the upper baffle 1;

- lower baffle 2, providing the last stage of separation at a pressure close to the pressure in the separator, due to counter-washing of flows in the bath formed by a longitudinally truncated pipe of larger diameter and due to the forces of inertia, gravity and centrifugal forces, and the subsequent output of the formed flows into the internal part of the separator body 12 (by overflowing part of the flow through the edges of the lower reflector 2 to the bottom of the separator of the mainly liquid component of the flow and by the ascent of the flow saturated with gas through the emulsion layer in the separator).

Each mentioned node separates part of the gas in the flow and directs it upward, and directs the rest of the liquid directly to the bottom of the vessel. In this case, the gas is evenly distributed in the upper part of the vessel, which contributes to the efficient functioning of other devices further along the technological chain.

The device is connected to an external pipeline via a flange 11. The inlet gas-liquid flow first passes through two elbows 10, connected in series by a pipe 6. In this case, the direction of the flow of the gas-liquid mixture changes several times and ensures that the main part of the inlet device is immersed in the middle layer of the gas-liquid mixture in the separator and the initial partial redistribution of liquid along the pipe wall 6 and elbows 10, and gas to the center of the pipe, where it is grouped into larger bubbles. Next, the flow enters the tubular distributor 7 with a plug 5 for the first removal of part of the flow with a predominance of gas in this flow through its perforation 9 in the middle level, which is then further separated, floating to the top of the baffle 1 with a part of the flow exiting through its upper perforation 8 with a predominant gas content, and the rest of the flow with a predominance of liquid, reflected from the upper baffle 1, goes down and mixes with the other part of the flow from the lower part of the tubular distributor 7 entering through the perforation 8. Two such mixed flows are formed in the lower parts of the upper baffle 1 (symmetrical with respect to the tubular distributor 7), are directed by the upper bumper 1 towards each other to enhance the release of gas from the flow. In this case, the liquid part of the flow is pressed against the wall of the lower bumper 2 by centrifugal forces and flows over the edges of this bumper directly into the lower part of the separator body 12, and the gas part of the flow is carried to the upper part of the separator and through valve 14 (Fig. 3) is supplied to the gas outlet pipe 15.

The water exits through pipe 20, valve 19 and the water outlet pipe (Fig. 3).

The oil exits through pipe 16, valve 17 (Fig. 3) and the oil exit pipe.

The design of the proposed input device of a three-phase separator is simple and technologically advanced due to the use of standard components and materials and means for their processing.

The inventive inlet device provides a significant increase in separation efficiency, achieved by sequentially passing the gas-oil mixture through several successive stages with different effects on the flow and a stepwise reduction in pressure in the flow.

The inventive input device of a three-phase separator can be repeatedly reproduced on modern industrial equipment, is planned for use in installations for separating gas-liquid mixtures and can be used, in particular, in the oil industry for the preliminary preparation of oil.

List and name of elements.

1. - Upper bump stop.

2. - Lower bump stop.

3. - Headscarf.

4. - Headscarf.

5. - Plug.

6. - Knee.

7. - Perforated tubular distributor.

8. - Perforation of the middle part of the tubular distributor.

9. - Perforation of the lower part of the tubular distributor.

10. - Knee.

11. - Flange.

12. - Separator housing.

13. - Drop eliminator.

14. - Valve.

15. - Gas outlet pipe.

16. - Pipe.

17. - Valve.

18. - Perforation.

19. - Valve.

20. - Pipe.

21. - Partition.

Claims (5)

1. An inlet device of a three-phase separator containing an inlet pipe for introducing a gas-oil mixture and a perforated tubular distributor for introducing a gas-oil mixture, characterized in that it additionally contains upper and lower baffles, and the inlet pipe for introducing a gas-oil mixture is made in the form of two elbows located one above the other, connected by a pipe, the outlet of the lower bend is connected to a perforated tubular distributor equipped end cap, on the upper part of the perforated tubular distributor, the inner surface of the upper bumper is fixed, made in the form of a longitudinally truncated pipe of a larger diameter than the perforated tubular distributor, while the upper bumper is equipped with longitudinal double-sided perforation and is installed with the open part downwards, the lower bumper is attached to the lower edges of the upper bumper a bumper made in the form of a longitudinally truncated pipe, the diameter of which is greater than the diameter of the upper bumper, and the lower bumper is installed with the open part up. 2. The input device of a three-phase separator according to claim 1, characterized in that the elbows of the input pipe are located in the same plane. 3. The input device of a three-phase separator according to claim 1, characterized in that the elbows of the input pipe are rotated relative to each other. 4. The inlet device of a three-phase separator according to claim 1, characterized in that the perforated tubular distributor is made with double-sided perforation in the middle and lower parts. 5. The input device of a three-phase separator according to claim 1, characterized in that a flange is installed at the end of the upper elbow.