CN217540379U

CN217540379U - Slug flow catcher

Info

Publication number: CN217540379U
Application number: CN202220865214.5U
Authority: CN
Inventors: 文晓龙; 冯森森; 邹建东; 何义明; 谢腾腾; 李吉萍; 旬娇; 王丽娟; 李轩昂; 武艳波
Original assignee: Shanghai Lanbin Petrochemical Equipment Co Ltd; Lanpec Technologies Ltd
Current assignee: Shanghai Lanbin Petrochemical Equipment Co Ltd; Lanpec Technologies Ltd
Priority date: 2022-04-15
Filing date: 2022-04-15
Publication date: 2022-10-04
Anticipated expiration: 2032-04-15

Abstract

A slug flow catcher comprises a tank body, a gas phase outlet and a liquid phase outlet which are arranged on the tank body, and a liquid stable deflection component and a gas mist catcher which are arranged in the tank body, wherein the slug flow catcher is of a horizontal structure, namely the tank body is transversely arranged; a slug liquid inlet is penetratingly arranged on the end socket at one side of the tank body, an energy dissipation pipe is penetratingly arranged on the same central line of the slug liquid inlet and the tank body, and an outlet at the tail end of the energy dissipation pipe extends to the inner wall of the end socket at the other side of the tank body; the energy dissipation pipe is formed by sequentially detachably connecting a primary expanded pipe at the starting part, a secondary expanded pipe at the middle and rear part and a tail end half pipe pipeline at the tail end part end to end; the first stage expander expands to 1.25 times the diameter of the slug liquid inlet. The utility model discloses simple structure, the gas-liquid separation space is abundant, and it is stable to have inside gas-liquid flow field, can effectively promote gas-liquid separation and section plug flow entrapment, has solved the influence of mixing transportation pipeline section plug flow to low reaches facility, has guaranteed the steady and the safety of production operation.

Description

Slug flow catcher

Technical Field

The utility model relates to a processing equipment of oil gas mixture transportation pipeline section plug flow is applicable to the entrapment and the elimination of defeated section plug flow of oil gas field ground collection.

Background

With the development of ocean, land oil and gas fields and large condensate gas fields, multiphase flow commingling and transportation technology is continuously developed. In the multiphase flow mixing transportation process, slug flow is usually generated by long-distance transportation and pipeline turning shearing; in the development of oil and gas fields, slug flow may also occur due to well operation and maintenance. The severe slug flow causes a series of problems of hydraulic shock, liquid level fluctuation, blockage and the like to oil-gas separation equipment at the tail end of the pipeline and subsequent process facilities, so that the downstream process facilities are difficult to normally operate.

Chinese patent 201710543940.9 discloses a finger-shaped slug flow dissipation separation device, which continuously reduces the speed and momentum of fluid and dissipates the energy of slug at the same time by arranging a shunt pipe and a finger-shaped branch pipe, and finally sends the separated gas-liquid two phases to downstream facilities through a gas collection pipe and a liquid collection pipe respectively. The device is large in footprint and lacks structural components to effectively handle slug flow.

Chinese patent 201620777487.9 discloses a cyclone slug flow catcher, which is designed for tangential feeding, a cyclone cylinder is installed in a vertical structure, and a TP assembly with a radial channel is installed in the upper space. The gas-liquid separation space inside the equipment is limited, and the processing capacity and the final gas-liquid separation effect are limited.

The Chinese patent ZL.201810786014.9 is a slug flow catcher developed according to a slug flow mechanism and characteristics, and the slug flow catcher mainly has the functions of absorbing energy and catching a liquid plug. However, the spiral distributor in the slug flow catcher has the problems of serious overflow and uneven liquid flow distribution of the gas-liquid coalescence internal parts.

SUMMERY OF THE UTILITY MODEL

The utility model provides a slug flow catcher has that inside gas-liquid flow field is stable, can effectively promote gas-liquid separation and slug flow entrapment, has solved the influence of mixing transportation pipeline section plug flow to low reaches facility, has guaranteed the steady and the safety of production operation.

In order to realize the purpose, the utility model discloses a technical scheme is:

a slug flow catcher comprises a tank body, a gas phase outlet and a liquid phase outlet which are arranged on the tank body, and a liquid stable flow baffle component and a gas mist catcher which are arranged in the tank body, wherein the slug flow catcher is of a horizontal structure, namely the tank body is transversely arranged; a slug liquid inlet is arranged on a seal head at one side of the tank body in a penetrating way, an energy dissipation pipe is arranged in the tank body in a penetrating way on the same central line with the slug liquid inlet, and an outlet at the tail end of the energy dissipation pipe extends to the inner wall of the seal head at the other side of the tank body; the energy dissipation pipe is formed by sequentially connecting a primary expanded pipe at the starting part, a secondary expanded pipe at the middle and rear part and a tail end half pipe pipeline at the tail end part in a detachable way; the primary pipe expansion is expanded to 1.25 times of the diameter of the slug liquid inlet, and the length of the pipeline of the primary pipe expansion is 2/3 of the length of the tank body; the pipe length of the secondary expander 10 is 1/3 of the tank length.

The primary expansion pipe is a primary eccentric expansion pipe consisting of a primary eccentric reducer and a primary expansion pipe pipeline; the first-stage pipe expanding pipeline is internally provided with a curved surface energy dissipater, and the first curved surface energy dissipater is arranged at 1/3 of the first-stage pipe expanding pipeline; the second curved surface energy dissipater is positioned at 4/5 of the first-stage pipe expanding pipeline; the curved surface energy dissipater is a spiral curved surface plate, and the spiral length is 0.5 to 1 screw pitch.

The curved surface of the first curved surface energy dissipator is a clockwise curved surface, and the curved surface of the second curved surface energy dissipator is an anticlockwise curved surface.

The second-stage expanding pipe is a second-stage eccentric expanding pipe consisting of a second-stage eccentric reducer and a second-stage expanding pipe pipeline; the diameter of the second-stage pipe expanding pipeline is 1.25 times that of the first-stage pipe expanding pipeline; and a steady flow energy dissipater is arranged on the pipeline of the secondary pipe expanding pipeline and is positioned at 1/3 of the secondary pipe expanding pipeline.

The flow stabilizing energy dissipater is formed by rotating a plurality of blades around the central point of the secondary pipe expanding pipeline, and the blades are arranged at an angle of 30-45 degrees along the axis of the secondary pipe expanding pipeline.

The tail end half pipe pipeline of the energy dissipation pipe starts from a 2/3 position of the secondary pipe expansion pipeline to the tail end of the energy dissipation pipe; the tail end half-pipe pipeline is terminated at the position which is 100mm away from the inner wall of the seal head.

And an anti-impact baffle is arranged on the wall of the tank body end socket opposite to the pipeline fluid outlet of the tail end half-pipe pipeline of the energy dissipation pipe.

The energy dissipation pipe at the front end of the beginning of the tail end semi-pipe pipeline is provided with a liquid guide plate, the upper edge of the liquid guide plate is flush with the horizontal central line of the energy dissipation pipe, the lower edge of the liquid guide plate is flush with the low liquid level in the tank body, and two sides of the liquid guide plate are fixedly connected with the inner wall of the tank body.

The liquid stabilizing and baffling component comprises a liquid stabilizing plate and a liquid baffling plate which are sequentially arranged along the flowing direction of the fluid; the upper edge of the liquid flow stabilizing plate is level with the center line of the energy dissipation pipe in the vertical direction, and a liquid channel is formed between the bottom edge of the liquid flow stabilizing plate and the tank body; the upper edge of the liquid baffle plate is positioned between the upper edge and the bottom edge of the liquid stabilizing plate in the vertical direction, and the bottom of the liquid baffle plate is connected with the bottom of the tank body.

The gas mist catcher is arranged in a gas phase space in the equipment and is close to the gas phase outlet; the gas phase outlet and the liquid phase outlet are respectively arranged at the upper part and the lower part of the tank body close to the slug liquid inlet end; the gas outlet is provided with a gas guide plate, and the liquid outlet is provided with a liquid vortex breaker.

The utility model discloses in, slug liquid gets into the energy dissipation pipe in the slug flow catcher through slug liquid entry, slows down the velocity of flow in the one-level expander pipe way of energy dissipation pipe, uses eccentric expander pipe, and the gaseous phase in the pipeline overflows from the liquid phase, and the slug liquid in the pipeline does not change the flow direction steady flow gradually and tends to the continuous phase. The slug liquid passes through a first curved surface energy dissipater in the energy dissipation pipe to dissipate energy, and the flowing state of the fluid is changed from axial flowing to clockwise spiral flowing; the fluid passes through the second curved surface energy dissipater, and the original clockwise axial flow energy dissipation of the fluid is changed into anticlockwise axial flow energy dissipation. The fluid direction change is an energy dissipation process. The fluid after energy dissipation enters a secondary eccentric pipe expanding pipeline in the energy dissipation pipe to continuously slow down the flow speed, the eccentric pipe expanding is used again, so that the gas phase in the pipeline continuously overflows from the liquid phase, and the slug liquid in the pipeline does not change the flow direction, is gradually stable and tends to a continuous phase. And performing micro-rotation energy dissipation through a steady flow energy dissipater, and performing gas-liquid primary separation after entering a tail end half-pipe pipeline. The separated gas overflows into the gas phase space and is discharged from the gas phase outlet through the gas mist catcher. The liquid obtained by gas-liquid separation is guided to the tank bottom by the liquid, passes through the space between the liquid stabilizing plate and the tank body, and then passes through the liquid baffle plate to complete baffling, and the liquid level of the liquid is finally discharged from the liquid phase outlet after being stabilized.

The utility model discloses simple structure, the gas-liquid separation space is abundant, and it is stable to have inside gas-liquid flow field, can effectively promote gas-liquid separation and slug flow entrapment, has solved the influence of defeated pipeline section plug flow in mixture to low reaches facility, has guaranteed the steady and the safety of production operation.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of FIG. 1;

FIG. 3 is a schematic structural view of the clockwise curved surface energy dissipater of the present invention;

FIG. 4 is a schematic structural view of the counterclockwise curved surface energy dissipater of the present invention;

FIG. 5 is a schematic perspective view of the steady flow energy dissipater of the present invention;

FIG. 6 is a schematic front view of the structure of FIG. 5;

FIG. 7 is a schematic structural view of the eccentric reducer of the present invention;

in the figure: 1-slug liquid inlet; 2-gas phase outlet; 3-liquid phase outlet; 4, a demister; 5-first-stage pipe expanding 5-1 first-stage eccentric reducer; 5-2-first-stage pipe expanding pipeline 6-first curved surface energy dissipater; 7-a second curved surface energy dissipator; 8, an energy dissipation pipe; 9-a tank body; 10-two-stage pipe expanding; 10-1-two-stage eccentric reducer; 10-2-second stage pipe expanding pipeline; 11-steady flow energy dissipater; 12-terminal half-pipe; 13-a liquid deflector; 14-impingement baffles; 15-liquid flow stabilizer; 16-liquid baffle; 17-gas deflector 18-liquid vortex breaker.

Detailed Description

Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 1 and 2, a slug flow catcher comprises a tank 9, a gas phase outlet 2 and a liquid phase outlet 3 which are arranged on the tank, a liquid stable flow baffle assembly and a gas mist catcher which are arranged in the tank, wherein the slug flow catcher is of a horizontal structure, namely the tank 9 is transversely arranged; a slug liquid inlet 1 is penetratingly arranged on a seal head at one side of the tank body 9, an energy dissipation pipe 8 is penetratingly arranged in the tank body 9 and on the same horizontal line with the slug liquid inlet 1, and an outlet at the tail end of the energy dissipation pipe 8 (the energy dissipation pipe 8 is supported by a pipe support arranged on the inner wall of the tank body) extends to the inner wall of the seal head at the other side of the tank body 9; the energy dissipation pipe 8 is formed by sequentially connecting a primary expanding pipe 5 at the starting part, a secondary expanding pipe 10 at the middle and rear part and a tail end half pipe pipeline 12 at the tail end part end to end by bolts; the primary expanding pipe 5 is expanded to be 1.25 times of the diameter of the slug liquid inlet, and the length of the pipeline of the primary expanding pipe 5 is 2/3 of the length of the tank body; the pipe length of the secondary expansion pipe 10 is 1/3 of the tank length.

In the above, the radial position of the nozzle of the slug liquid inlet 1 should ensure that the bottommost part of the nozzle is flush with the high operating liquid level in the device.

As shown in fig. 7, the primary expanding pipe 5 is a primary eccentric expanding pipe composed of a primary eccentric reducer 5-1 and a primary expanding pipe 5-2; a curved surface energy dissipater is arranged in the first-stage pipe expanding pipeline 5-2, and a first curved surface energy dissipater is arranged at 1/3 part of the first-stage pipe expanding pipeline; the second curved surface energy dissipater is positioned at 4/5 of the first-stage pipe expanding pipeline; the curved surface energy dissipater is a spiral curved surface plate, and the spiral length is 0.5 to 1 screw pitch.

The use of the first-stage eccentric expanding pipe is beneficial to the overflow of gas phase in liquid in the pipeline, so that the slug liquid in the pipeline does not change the flowing direction, is gradually stabilized and tends to continuous phase.

As shown in fig. 3 and 4, the curved surface of the first curved surface energy dissipator 6 is a clockwise curved surface, and the curved surface of the second curved surface energy dissipator 7 is a counterclockwise curved surface.

The slug liquid passes through a first curved surface energy dissipater 6 in the energy dissipation pipe to dissipate energy, and the flowing state of the fluid is changed from axial flowing to clockwise spiral flowing; the fluid passes through the second curved surface energy dissipater 7, and the original clockwise axial flow energy dissipation of the fluid is changed into anticlockwise axial flow energy dissipation. The fluid direction change is an energy dissipation process.

As shown in fig. 7, the second-stage expanding pipe 10 is a second-stage eccentric expanding pipe composed of a second-stage eccentric reducer 10-1 and a second-stage expanding pipe 10-2. The diameter of the second-stage pipe expanding pipeline 10-2 is 1.25 times that of the first-stage pipe expanding pipeline 5-2; and a steady flow energy dissipater is arranged on the pipeline of the secondary pipe expanding pipeline 10-2 and is positioned at 1/3 of the secondary pipe expanding pipeline 10-2.

As shown in fig. 5 and 6, the steady flow energy dissipater is formed by rotating a plurality of blades around the central point of the secondary pipe expansion pipeline 10-2, and the blades are arranged at an angle of 30 to 45 degrees along the axis of the secondary pipe expansion pipeline 10-2, so that the energy dissipation can be performed on fluid to avoid increasing pressure drop, and meanwhile, the rotating blades have the functions of shunting and stabilizing flow.

The fluid energy-dissipated by the first-stage eccentric pipe expansion and the curved surface effect device enters a second-stage eccentric pipe expansion pipeline in the energy dissipation pipe to continuously slow down the flow speed, the second-stage eccentric pipe expansion is used, so that the gas phase in the pipeline continuously overflows from the liquid phase, and the slug liquid in the pipeline gradually stabilizes the flow and tends to a continuous phase without changing the flow direction. And performing micro-rotation energy dissipation through a steady flow energy dissipater.

The end half pipe 12 of the energy dissipation pipe 8 starts at 2/3 of the second-stage expanded pipe 10-2 until the end of the energy dissipation pipe 8. The terminal half-pipe pipeline ends at a distance of about 100mm from the tank head.

And allowing the slug liquid to enter a tail end half pipe pipeline for gas-liquid primary separation. The separated gas overflows into the gas phase space and is discharged from the gas phase outlet through the gas mist catcher. The liquid obtained by gas-liquid separation is guided to the tank bottom by the liquid, passes through the space between the liquid stabilizing plate and the tank body, and then passes through the liquid baffle plate to complete baffling, and the liquid level of the liquid is finally discharged from the liquid phase outlet after being stabilized.

And an anti-impact baffle plate 14 is arranged on the wall of the tank body end socket opposite to the pipeline fluid outlet of the tail end half-pipe pipeline 12 of the energy dissipation pipe. The anti-impact baffle 14 reduces the fluid carrying momentum on the one hand and prevents the gas and liquid from eroding the shell head on the other hand.

The front end energy dissipation pipe at the beginning of the tail end half pipe pipeline 12 is provided with a liquid guide plate 13, the upper edge of the liquid guide plate 13 is flush with the horizontal central line of the energy dissipation pipe, the lower edge of the liquid guide plate 13 is flush with the low liquid level in the tank body, and two sides of the liquid guide plate 13 are fixedly connected with the inner wall of the tank body 9. The liquid guide plate 13 can play a role in supporting the energy dissipation pipe while guiding liquid.

The liquid stabilizing and baffling component comprises a liquid stabilizing plate 15 and a liquid baffling plate 16 which are sequentially arranged along the flowing direction of the fluid; the upper edge of the liquid flow stabilizing plate 15 is level with the central line of the energy dissipation pipe in the vertical direction, and a liquid channel is formed between the bottom edge of the liquid flow stabilizing plate 15 and the tank body; the upper edge of the liquid baffle plate 16 is positioned between the upper edge and the bottom edge of the liquid stabilizing plate 15 in the vertical direction, and the bottom of the liquid baffle plate 16 is connected with the bottom of the tank body. The liquid steady deflection component reduces the kinetic energy carried by the liquid, and the liquid stably flows after turning over the deflection plate.

The gas mist catcher 4 is arranged in the gas phase space in the equipment and close to the gas phase outlet 2; the gas phase outlet 2 and the liquid phase outlet 3 are respectively arranged at the upper part and the lower part of the tank body close to the slug liquid inlet end; the gas outlet 2 is provided with a gas guide plate 17, and the liquid outlet 3 is provided with a liquid vortex breaker 18 to prevent the gas outlet and the liquid outlet from forming vortex. The gas mist catcher 4 and the liquid vortex breaker 18 are both made of products which are conventionally used by children.

In the present invention, the term "downstream" refers to the relative arrangement of the components with respect to the material flow direction, and the meaning of the term is known to those skilled in the art.

The utility model discloses a slug flow catcher, slug liquid get into the energy dissipation pipe in the slug flow catcher through slug liquid entry, slow down the velocity of flow in the one-level expand tube pipe way of energy dissipation pipe, use eccentric expand tube, gaseous phase in the pipeline overflows from the liquid phase, and the slug liquid in the pipeline does not change the flow direction steady flow gradually and tends to the continuous phase. The slug liquid passes through a first curved surface energy dissipater in the energy dissipation pipe to dissipate energy, and the flowing state of the fluid is changed from axial flowing to clockwise spiral flowing; the fluid passes through the second curved surface energy dissipater, and the original clockwise axial flow energy dissipation of the fluid is changed into anticlockwise axial flow energy dissipation. The fluid direction change is an energy dissipation process. The fluid after energy dissipation enters a secondary pipe expanding pipeline in the energy dissipation pipe to continuously slow down the flow speed, an eccentric pipe expanding is used, the gas phase in the pipeline continuously overflows from the liquid phase, and the slug liquid in the pipeline does not change the flow direction, is gradually stable and tends to a continuous phase. And performing micro-rotation energy dissipation through a steady flow energy dissipater, and performing gas-liquid primary separation after entering a tail end half pipe pipeline. The separated gas overflows into the gas phase space and is discharged from the gas phase outlet through the gas mist catcher. The liquid obtained by gas-liquid separation is guided to the tank bottom by the liquid, passes through the space between the liquid stabilizing plate and the tank body, and then passes through the liquid baffle plate to complete baffling, and the liquid level of the liquid is finally discharged from the liquid phase outlet after being stabilized.

The utility model discloses simple structure, the gas-liquid separation space is abundant, and inside gas-liquid flow field is stable, can effectively promote gas-liquid separation and slug flow entrapment, has solved the influence of defeated pipeline segment plug flow in mixture to low reaches facility, has guaranteed the steady and the safety of production operation.

Claims

1. A slug flow catcher comprises a tank body, a gas phase outlet and a liquid phase outlet which are arranged on the tank body, and a liquid stable flow baffle component and a gas mist catcher which are arranged in the tank body, and is characterized in that the slug flow catcher is of a horizontal structure, namely the tank body (9) is transversely arranged; a slug liquid inlet (1) is arranged on a seal head at one side of the tank body (9) in a penetrating way, an energy dissipation pipe (8) is arranged in the tank body (9) in a penetrating way on the same central line with the slug liquid inlet (1), and an outlet at the tail end of the energy dissipation pipe (8) extends to the inner wall of the seal head at the other side of the tank body (9); the energy dissipation pipe (8) is formed by sequentially detachably connecting a primary expanded pipe (5) at the starting part, a secondary expanded pipe (10) at the middle and rear part and a tail end half pipe pipeline (12) at the tail end part end to end; the primary pipe expansion is expanded to 1.25 times of the diameter of the slug liquid inlet, and the length of the pipeline of the primary pipe expansion (5) is 2/3 of the length of the tank body; the pipeline length of the secondary expanding pipe (10) is 1/3 of the length of the tank body.

2. The slug flow catcher according to claim 1, characterized in that said primary expanded pipe (5) is a primary eccentric expanded pipe consisting of a primary eccentric reducer (5-1) and a primary expanded pipe (5-2); the first-stage pipe expanding pipeline (5-2) is internally provided with a curved surface energy dissipater, and the first curved surface energy dissipater (6) is arranged at 1/3 part of the first-stage pipe expanding pipeline; the second curved surface energy dissipater (7) is positioned at 4/5 of the first-stage pipe expanding pipeline; the curved surface energy dissipater is a spiral curved surface plate, and the spiral length is 0.5 to 1 screw pitch.

3. A slug flow catcher according to claim 2, wherein the curved surface of said first curved surface dissipator is clockwise curved and the curved surface of said second curved surface dissipator is counter-clockwise curved.

4. The slug flow catcher as claimed in claim 1, characterized in that said secondary expansion pipe (10) is a secondary eccentric expansion pipe consisting of a secondary eccentric reducer (10-1) and a secondary expansion pipe (10-2); the diameter of the secondary pipe expanding pipeline (10-2) is 1.25 times that of the primary pipe expanding pipeline (5-2); and a steady flow energy dissipater is arranged on the pipeline of the secondary pipe expanding pipeline (10-2) and is positioned at 1/3 of the secondary pipe expanding pipeline (10-2).

5. The slug flow catcher according to claim 4, characterized in that the steady flow energy dissipater is composed of a plurality of blades rotating around the center point of the secondary expanded pipe (10-2), and the blades are arranged at an angle of 30-45 ° with the axis of the secondary expanded pipe (10-2).

6. A slug flow trap according to claim 1 characterized in that the terminal half pipe (12) of the energy dissipating pipe (8) starts at 2/3 of the secondary pipe expanding pipe (10-2) up to the terminal end of the energy dissipating pipe (8); the tail end half-pipe pipeline is terminated at the position which is 100mm away from the inner wall of the seal head.

7. The slug flow catcher as claimed in claim 6, characterized in that the tank closure wall facing the pipe fluid outlet of the terminal half pipe (12) of the energy dissipating pipe is provided with an impact damper (14).

8. A slug flow catcher according to any of claims 1-7, characterized in that the front energy dissipating pipe where the end half pipe (12) starts is provided with a liquid guiding plate (13), the upper edge of the liquid guiding plate (13) is level with the horizontal center line of the energy dissipating pipe (8), the lower edge of the liquid guiding plate (13) is level with the low liquid level in the tank, and both sides of the liquid guiding plate (13) are fixed to the inner wall of the tank (9).

9. The slug flow trap according to claim 8 wherein the liquid stabilizing baffle assembly comprises a liquid stabilizing plate (15) and a liquid baffle plate (16) arranged in series along the direction of fluid flow; the upper edge of the liquid flow stabilizing plate (15) is level with the central line of the energy dissipation pipe in the vertical direction, and a liquid channel is formed between the bottom edge of the liquid flow stabilizing plate (15) and the tank body; the upper edge of the liquid baffle plate (16) is positioned between the upper edge and the bottom edge of the liquid flow stabilizing plate (15) in the vertical direction, and the bottom of the liquid baffle plate (16) is connected with the bottom of the tank body.

10. The slug flow trap according to claim 9 wherein the gas mist trap (4) is arranged in the gas phase space inside the device near the gas phase outlet (2); the gas phase outlet (2) and the liquid phase outlet (3) are respectively arranged at the upper part and the lower part of the tank body close to the slug liquid inlet end; a gas guide plate (17) is arranged at the gas phase outlet (2), and a liquid vortex breaker (18) is arranged at the liquid phase outlet (3).