阅读说明：本技术 一种段塞流捕集器 (Slug flow catcher ) 是由 王亚彪 田野 张�成 袁毅夫 于 2018-07-17 设计创作，主要内容包括：本发明属于油气混输管道处理设备领域,涉及一种段塞流捕集器。包括：罐体；段塞液入口,所述段塞液入口设置于罐体一侧；气相出口,所述气相出口设置于罐体顶部；油相出口,所述油相出口设置于罐体底部；旋流板,所述旋流板设置于所述罐体内,所述旋流板的流体入口与段塞液入口连通；液体稳折流组件,所述液体稳折流组件设置于所述旋流板下游且位于罐体中下部；至少一组导气聚液组件,所述至少一组导气聚液组件沿罐体轴向依次设置于罐体上部。采用本发明的段塞流捕集器,可以捕集和消除段塞流,使流态趋于平稳,有利于后续工艺生产过程的安全稳定运行,同时可以快速高效地完成气液相分离。(The invention belongs to the field of oil-gas mixed transportation pipeline treatment equipment, and relates to a slug flow catcher. The method comprises the following steps: a tank body; a slug liquid inlet disposed at one side of the tank body; the gas phase outlet is arranged at the top of the tank body; the oil phase outlet is arranged at the bottom of the tank body; the swirl plate is arranged in the tank body, and a fluid inlet of the swirl plate is communicated with a slug liquid inlet; the liquid stable deflection component is arranged at the downstream of the rotational flow plate and is positioned at the middle lower part of the tank body; and the at least one group of gas guide liquid gathering components are sequentially arranged on the upper part of the tank body along the axial direction of the tank body. The slug flow catcher can catch and eliminate slug flow, so that the flow state tends to be stable, the safe and stable operation of the subsequent process production process is facilitated, and meanwhile, the gas-liquid phase separation can be quickly and efficiently completed.)

1. A slug flow trap characterized in that it comprises:

a tank body;

a slug liquid inlet disposed at one side of the tank body;

the gas phase outlet is arranged at the top of the tank body;

the oil phase outlet is arranged at the bottom of the tank body;

the swirl plate is arranged in the tank body, and a fluid inlet of the swirl plate is communicated with a slug liquid inlet;

the liquid stable deflection component is arranged at the downstream of the rotational flow plate and is positioned at the middle lower part of the tank body;

and the at least one group of gas guide liquid gathering components are sequentially arranged on the upper part of the tank body along the axial direction of the tank body.

2. The slug flow catcher according to claim 1, wherein the swirl plate is a tapered helicoid structure, fluid channels are formed between helicoids, and the swirl plate is overall in the shape of an inverted truncated cone with a spiral cross section; at least part of the periphery of the rotational flow plate is connected with the inner wall of the tank body, and the slug liquid inlet is tangent to the inner wall of the rotational flow plate; the width of the swirl plate fluid channel is greater than the diameter of the slug liquid inlet, and preferably, the width of the swirl plate fluid channel is 1.2-2 times of the diameter of the slug liquid inlet; preferably, the cone angle of the inverted cone is not less than 30 degrees.

3. The slug flow trap according to claim 1 wherein the vertical distance of the swirl plate top edge from the slug liquid inlet centerline is equal to 0.8-1.2 times the slug liquid inlet diameter and the vertical distance of the swirl plate bottom edge from the slug liquid inlet centerline is 1.2-1.8 times the slug liquid inlet diameter.

4. The slug flow catcher according to claim 1, wherein the liquid stabilizing flow assembly comprises a liquid stabilizing plate and a liquid baffle plate sequentially arranged along the fluid flow direction, the upper edge of the liquid stabilizing plate is higher than the bottom edge of the rotational flow plate in the vertical direction, a liquid channel is formed between the bottom edge of the liquid stabilizing plate and the tank body, the upper edge of the liquid baffle plate is located 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.

5. The slug flow trap according to claim 1 wherein the gas directing and liquid collecting assembly comprises a gas deflector and a liquid droplet coalescing plate arranged in series along the direction of fluid flow.

6. The slug flow trap according to claim 5,

the gas guide plate consists of an inclined plate and two arc plates, the two arc plates are respectively connected with the inclined plate in a tangential manner from head to tail, so that the longitudinal section of the gas guide plate is inclined in an S shape and is inclined towards the direction of the gas phase outlet, and the periphery of the side part of the gas guide plate is connected with the tank body;

the droplet coalescence plate is an arc-shaped plate, and the periphery of the upper part of the droplet coalescence plate is connected with the top of the tank body; preferably, the radian of the arc-shaped plate is not more than pi, the arc-shaped plate is bent towards the direction of the slug liquid inlet, and an included angle is formed between an arc chord line and the vertical direction.

7. The slug flow trap according to claim 5 wherein the arc of the gas baffle is no more than 0.5 pi.

8. The slug catcher as claimed in claim 5, wherein the droplet coalescer plate bottom edge is not lower than 1/2 of gas phase space height in vertical direction.

9. The slug catcher according to claim 5, wherein the width of the bottom edge of the droplet coalescer plate is equal to or greater than the width of the top edge of the gas deflector, which is vertically flush with or higher than the bottom edge of the droplet coalescer plate.

10. The slug flow catcher according to claim 1, wherein a water dividing bag is arranged at the bottom of the tank body of the slug flow catcher and close to the oil phase outlet, and a water phase outlet is arranged on the water dividing bag; an oil separation baffle is arranged between the water distribution bag and the oil phase outlet and close to one side of the water distribution bag.

Technical Field

The invention belongs to the field of oil-gas mixed transportation pipeline treatment equipment, and particularly relates to a slug flow catcher.

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 by arranging a shunt tube and a finger-shaped branch tube, 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 swirl slug catcher, which is designed for tangential feeding, a swirl tube is installed in a vertical structure, and a TP assembly with a radial channel is installed in the upper space. The structure of the cyclone cylinder and the TP assembly of the equipment is complex, the gas-liquid separation space in the equipment is limited, and the processing capacity and the final gas-liquid separation effect are limited.

Chinese patent application 200810232329.5 discloses a slug flow trapping system, which mainly comprises a cyclone device, a gas rectifying device, a vertical mist trapping and separating device and other key components. The system has high requirements on the design level of each component, the performance of the whole system is affected by the efficiency reduction of any component, and meanwhile, the system has more internal components and is complex in design. The Chinese patent application 200510096834.8 discloses a slug flow catcher for oil-gas mixed transportation segments, which is lack of a gas rectifying device compared with the Chinese patent application 200810232329.5, and is easy to generate vortex when the gas amount is large, thereby influencing the gas-liquid separation effect; the disclosed sand collecting hopper, sand washing pipe, sand discharging pipe and other facilities are complex in structure and are less used in practice.

Therefore, at present, no slug flow catcher which can effectively solve the problem of slug flow catching, has a simple structure and is practical is available.

Disclosure of Invention

The object of the present invention is to overcome the above mentioned drawbacks of the prior art and to provide a slug flow trap. The trap has the advantages of simple structure, sufficient gas-liquid separation space, capability of effectively promoting gas-liquid separation and slug flow trapping, capability of solving the influence of the slug flow of the mixed transportation pipeline segment on downstream facilities, and capability of ensuring the stability and safety of production and operation.

In order to achieve the above object, the present invention provides a slug catcher comprising:

a tank body;

a slug liquid inlet disposed at one side of the tank body; can be arranged on the upper part of the end socket at one side of the tank body;

the gas phase outlet is arranged at the top of the tank body; can be arranged on the top of the tank body far away from the slug liquid inlet;

the oil phase outlet is arranged at the bottom of the tank body; can be arranged at the bottom of the tank body far away from the slug liquid inlet;

the swirl plate is arranged in the tank body, and a fluid inlet of the swirl plate is communicated with a slug liquid inlet;

the liquid stable deflection component is arranged at the downstream of the rotational flow plate and is positioned at the middle lower part of the tank body;

and the at least one group of gas guide liquid gathering components are sequentially arranged on the upper part of the tank body along the axial direction of the tank body. The number of the gas guide liquid collecting assemblies can be determined according to the length of the catcher tank body and the requirements of a specific process.

In the invention, the slug flow catcher is of a horizontal structure.

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

In the invention, the rotational flow plate has the functions of dissipating energy of slug liquid and simultaneously performing gas-liquid separation in the rotational flow process. According to a preferred embodiment of the present invention, the swirl plate has a tapered spiral surface structure, a fluid channel is formed between the spiral surfaces, the swirl plate is integrally in an inverted truncated cone shape, the cross section of the swirl plate is in a spiral shape, and the number of turns of the spiral line can be one or more, generally two. At least part periphery of whirl board is connected with jar internal wall, connect and both included the lug connection, also include indirect connection, the lug connection for example for the welding, the slug liquid entry is preferred tangent with whirl board inner wall. The width of the swirl plate fluid channel is greater than the diameter of the slug liquid inlet, and preferably, the width of the swirl plate fluid channel is 1.2-2 times the diameter of the slug liquid inlet.

The cone angle of the inverted cone is related to the gas-liquid ratio of the slug liquid, the smaller the liquid load, the larger the cone angle, and preferably, the cone angle is not less than 30 degrees.

According to the invention, preferably, the vertical distance of the upper edge of the swirl plate from the centerline of the slug liquid inlet is equal to 0.8-1.2 times the diameter of the slug liquid inlet, and the vertical distance of the bottom edge of the swirl plate from the centerline of the slug liquid inlet is 1.2-1.8 times the diameter of the slug liquid inlet. The bottom edge of the cyclone plate is preferably higher than the normal liquid level, and can also be immersed in the liquid, but the whole slug liquid inlet nozzle is ensured to be above the highest liquid level.

According to the invention, preferably, the liquid stabilizing baffle assembly comprises a liquid stabilizing plate and a liquid baffle plate which are sequentially arranged along the fluid flow direction, the upper edge of the liquid stabilizing plate is higher than the bottom edge of the rotational flow plate in the vertical direction, a liquid channel is formed between the bottom edge of the liquid stabilizing plate and the tank body, the upper edge of the liquid baffle plate is located 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, wherein the connection is welded for example. Generally, the upper edge of the liquid stabilizer is above the highest liquid level and the upper edge of the liquid baffle is below the lowest liquid level. The distance between the bottom edge of the liquid flow stabilizing plate and the tank body can be designed according to needs, and the requirement of passing the maximum amount of liquid is preferably met. The distance between the liquid flow stabilizing plate and the liquid baffle plate can also be designed according to requirements, and the requirement of maximum liquid passing is preferably met.

According to the invention, preferably, the gas guide liquid trap assembly comprises a gas guide plate and a liquid drop coalescence plate which are arranged in sequence along the flow direction of the fluid.

The gas guide plate consists of an inclined plate and two arc plates, the two arc plates are respectively connected with the inclined plate in a tangential manner from head to tail, so that the longitudinal section of the gas guide plate is in an inclined S shape and inclines towards the direction of the gas phase outlet, the periphery of the side part of the gas guide plate is connected with the tank body, and the connection is, for example, welding; the radian of the arc-shaped plate of the gas guide plate is not more than 0.5 pi. The lower edge of the gas guide plate can be higher or lower than the normal liquid level, and the normal liquid level is generally preferred.

The droplet coalescence plate is an arc-shaped plate, the periphery of the upper part of the droplet coalescence plate is connected with the top of the tank body, and the connection is welding for example; preferably, the radian of the arc-shaped plate is not more than pi, the arc-shaped plate is bent towards the direction of a slug liquid inlet, an arc chord line forms an included angle with the vertical direction, and the bottom edge of the liquid drop coalescence plate is not lower than 1/2 of the height of a gas phase space in the vertical direction.

According to the invention, for better droplet coalescence, the width of the bottom edge of the droplet coalescence plate is preferably equal to or greater than the width of the upper edge of the gas baffle, which is vertically flush with or higher than the bottom edge of the droplet coalescence plate.

According to the invention, preferably, a water dividing bag is arranged at the bottom of the tank body of the slug flow catcher and on one side close to the oil phase outlet, and a water phase outlet is arranged on the water dividing bag; an oil separation baffle is arranged between the water distribution bag and the oil phase outlet and close to one side of the water distribution bag.

By adopting the slug flow catcher, slug liquid enters the catcher through the slug liquid inlet and rotates along with the inner wall of the rotational flow plate, the slug liquid dissipates energy, gas-liquid separation is completed in the rotating process, the separated gas is guided through the gas guide plate, small liquid drops are coalesced in the climbing process, the gas wraps the liquid drops and continues to move forwards, the liquid drops continue to be coalesced on the liquid drop coalescent plate, the small liquid drops are changed into large liquid drops, the large liquid drops are separated from the gas, and finally the gas is discharged from the gas phase outlet; the liquid obtained by gas-liquid separation is continuously dissipated energy between the liquid flow stabilizing plate and the slug liquid inlet end socket, the stabilized liquid passes through the space between the liquid flow stabilizing plate and the tank body and then is baffled by the liquid baffle plate, the liquid level of the liquid is stabilized, and finally the liquid is discharged from the oil phase outlet. When the catcher is further provided with a water dividing bag, a water phase outlet and an oil separation baffle, free water can be divided out from the bottom of the catcher, so that the water dividing load of subsequent facilities is effectively reduced.

The invention has the beneficial effects that: by adopting the catcher, slug flow can be caught and eliminated, so that the flow state tends to be stable, the safe and stable operation of the subsequent process production process is facilitated, and the gas-liquid phase separation can be rapidly and efficiently completed. Meanwhile, free water can be separated out from the bottom of the catcher, and the water separation load of subsequent facilities can be effectively reduced for the water-containing raw materials.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.

FIG. 1 shows an elevational view of an exemplary embodiment according to the present invention;

FIG. 2 shows a top view of an exemplary embodiment according to the present invention;

FIG. 3 shows an enlarged view of a swirl plate in elevation according to an exemplary embodiment of the invention;

FIG. 4 shows an enlarged view of a gas baffle elevation in accordance with an exemplary embodiment of the present invention;

fig. 5 shows an enlarged view of a droplet coalescing plate elevation in accordance with an exemplary embodiment of the present invention.

Description of reference numerals:

1-slug liquid inlet; 2-gas phase outlet; 3-oil phase outlet; 4-dividing into water bags; 5-a swirl plate; 6-gas guide plate; 7-droplet coalescence plate; 8, a tank body; 9-water phase outlet; 10-oil separation baffle; 11-liquid stabilizer; 12-liquid baffles; 13-slug liquid inlet centerline; 14-upper edge of the cyclone plate; 15-bottom edge of the cyclone plate; 16-an arc-shaped plate; 17-inclined plate.

L is the liquid level of the catcher; theta-angle.

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 limited by the embodiments set forth herein.