CN216617490U - A multi-stage overflow gas-liquid cyclone separation device - Google Patents

Abstract

The utility model relates to a multistage overflow gas-liquid cyclone separation device which comprises an overflow outlet, a mixed phase liquid inlet, a columnar cyclone cavity, a first-stage outflow pipe, a second-stage outflow pipe, a first-stage overflow pipe, a spiral flow channel and a second-stage overflow pipe. The welding of overflow exit end face has the ring flange, overflow export and one-level overflow pipe coaxial coupling, and the one-level overflow pipe is connected with column whirl chamber coaxial coupling, and spiral runner welded mounting is on the one-level overflow pipe, the embedded second grade overflow pipe of one-level overflow pipe, and the column whirl chamber links to each other with the second grade overflow pipe is coaxial, and the second grade overflow pipe adopts the ring flange to be connected with the second grade outflow pipe. The utility model is provided with a primary overflow to enable the gas phase to overflow for the first time, the gas phase is subjected to secondary overflow by utilizing the combined action of the lifting cone and the secondary overflow pipe, and the liquid accumulation at the bottom of the cavity body caused by the bottom of the columnar vortex cavity is prevented by utilizing the streamline outflow hole. The device has simple structure, convenient installation and small occupied area, and can improve the separation efficiency.

Description

A multi-stage overflow gas-liquid cyclone separation device

technical field

The utility model relates to a separation device used in the fields of petroleum, chemical industry and environmental protection, in particular to a multi-stage overflow novel gas-liquid cyclone separation device.

Background technique

With the development of my country's oilfields entering the middle and late stages, the formation energy has dropped significantly. Besides crude oil, the produced fluids in oilfields also carry a large amount of impurities, such as gas, water and silt. The existence of the associated gas in the produced fluid not only reduces the recovery rate of oil production at the wellhead, but also has a negative impact on the oil-water separation effect. The existence of the gas will also reduce the production efficiency of the pump. If it is mixed with flammable gas, it will pose a major safety hazard to production. In order to meet the production measurement of oil wells, separators, as essential equipment, are required to have the characteristics of simple structure, compactness, easy installation, low energy consumption and high separation efficiency. Common gas-liquid separation methods include gravity sedimentation, filtration separation, and inertial separation. Among them, cyclone separation has the advantages of high efficiency and short residence time, and is widely used in downhole gas-liquid separation and offshore natural gas gas-liquid separation. Separation efficiency is an important indicator to measure the performance of a separator. To develop a gas-liquid separator with high separation efficiency, a reasonable structural design is crucial. Some of the existing oil fields have adopted gas flooding technologies such as carbon dioxide to increase the recovery rate. At this time, the gas-liquid ratio of the oil well will be higher. If effective degassing and gas prevention measures are not taken, the production of the oil well will be affected. increasingly visible impact. Therefore, the effective separation of the associated gas in the produced liquid is an urgent problem to be solved at present. Therefore, the utility model designs a new gas-liquid cyclone separation device for secondary overflow of gas, which greatly reduces the gas A series of effects have greatly improved the separation efficiency.

Utility model content

The purpose of the utility model is to overcome the inability of the traditional cyclone separation device to effectively discharge the gas, thereby reducing the pump efficiency and a series of influences caused by the gas, and to avoid the bottom of the columnar cyclone separation cavity causing liquid accumulation at the bottom of the cavity.

The technical scheme of the utility model is to provide a multi-stage overflow gas-liquid cyclone separation device, which includes an overflow outlet, a mixed-phase liquid inlet, a columnar cyclone cavity, a primary outlet pipe, a secondary outlet pipe, a primary outlet The overflow pipe, the spiral flow channel and the secondary overflow pipe are characterized by:

There is an overflow outlet at the top of the axial direction, and a flange plate is welded at the top of the overflow outlet; the overflow outlet and the first-level overflow pipe are connected with each other by a flange plate, the overflow outlet is connected with the first-level overflow pipe, and the spiral flow channel is welded and installed. On the primary overflow pipe, the secondary overflow pipe is embedded in the primary overflow pipe, and the secondary overflow pipe is communicated with the outlet of the overflow pipe. It is embedded in the columnar swirl chamber and is closely connected with the inner wall of the columnar swirl chamber.

The liquid inlet of the mixing item is installed with a swirl separation device inclined 30° relative to the axial direction. The end face of the liquid inlet of the mixing item is welded with a flange plate. The blue plate is connected with the secondary outflow branch pipe. The columnar cyclone separation chamber and the secondary overflow pipe are connected to each other through a flange plate, and a streamlined outflow is arranged on the connected flange plate to communicate the columnar cyclone separation chamber with the secondary overflow pipe, and the secondary overflow The pipe and the secondary outflow pipe are connected to each other through the flange plate.

Further, the columnar swirl chamber includes a spiral flow channel, a primary overflow pipe and a secondary overflow pipe, and the secondary overflow pipe is connected to the columnar cyclone separation chamber through a flange plate, and is connected to the end face of the flange plate. There is a streamline outflow hole;

The secondary overflow pipe is provided with a conical sieve pipe and a long conduit, and the long conduit communicates with the large cylindrical overflow hole.

Further, the end face of the flange plate of the secondary outflow pipe is provided with a lifting cone and an outflow hole; one end of the outflow hole is communicated with the secondary outflow pipe, and the other end is communicated with the secondary overflow pipe; The outflow branch pipe and the primary outflow pipe are connected to each other through the flange plate.

Further, one end of the outflow hole of the streamline is communicated with the bottom of the columnar swirl chamber, and the other end is communicated with the secondary overflow pipe.

Further, the lifting cone is composed of long cone ends, the lower part is welded and installed on the flange end face of the secondary outlet pipe, and the upper cone tip is flush with the conical screen hole pipe in the secondary overflow pipe.

Further, the primary overflow pipe is provided with an overflow circular hole and an overflow groove; the overflow outlet is welded with a flange, the mixed-phase liquid inlet is welded with a flange, and the secondary outlet pipe is welded with a flange. plate.

Further, both the small cylindrical overflow hole and the large cylindrical overflow hole communicate with the overflow outlet.

The present invention has the following beneficial effects:

(1) The utility model is equipped with the gas-liquid cyclone separation device, which can discharge the gas phase to the greatest extent, reduce or even eliminate the negative impact of the gas phase, and further improve the separation efficiency. The device has the advantages of simple structure, high separation efficiency, strong practicability, and high feasibility.

(2) The utility model is innovative in the structure of the cyclone. By adding a secondary overflow device to the cyclone separation device, the gas phase is fully discharged to reduce the possible influence of the gas phase. The flange plate of the flow pipe is provided with a flow line outflow hole to prevent the liquid phase from causing the cavity to accumulate liquid at the bottom of the columnar cyclone separation cavity, so as to achieve the purpose of improving the separation efficiency. The device has a simple structure, a compact interior and is easy to manufacture. .

(3) Judging from the separation situation of the traditional cyclone in the past, the method of improving the separation efficiency of the cyclone has a multi-stage series connection method. In the process of actual use, it is necessary to connect the overflow port with other post-processing equipment to re-purify the overflow medium, but the final effect is also unsatisfactory, and the cost is increased. However, the utility model can greatly By improving the separation efficiency to a certain extent, more gas-phase media can be separated, thereby saving a lot of manpower and material resources, and it is very practical.

(4) The liquid inlet, overflow port and underflow port of this scheme are all provided with flanges, which are convenient for connection with other equipment. Moreover, the overflow outlet, the columnar swirl chamber, the primary overflow pipe, the secondary overflow pipe and the secondary outflow pipe are all provided with flanges, and these five parts are also connected by the flanges. In addition, the design of the lifting cone also plays a positive role in the cyclone separation to a certain extent, and the design of the flow line outflow hole prevents the cavity from accumulating at the bottom of the columnar cyclone separation cavity.

Description of drawings:

Fig. 1 is the overall appearance diagram of the multi-stage overflow new gas-liquid cyclone separation device;

Figure 2 is an axial cross-sectional view of a multi-stage overflow new gas-liquid cyclone separation device;

Figure 3 is the overall exploded view of the multi-stage overflow new gas-liquid cyclone separation device;

4 is a cross-sectional view of the overflow outlet of the multi-stage overflow new gas-liquid cyclone separation device;

5 is a cross-sectional view of a columnar cyclone chamber of a multi-stage overflow novel gas-liquid cyclone separation device;

6 is a cross-sectional view of a cyclone separation field of a multi-stage overflow novel gas-liquid cyclone separation device;

Figure 7 is an axial cross-sectional view of the secondary overflow pipe of the multi-stage overflow novel gas-liquid cyclone separation device;

Figure 8 is a cross-sectional view of the outlet pipe of the multi-stage overflow novel gas-liquid cyclone separation device.

Among them: 1- overflow outlet, 2- mixed phase liquid inlet, 3- columnar swirl chamber, 4- primary outflow pipe, 5- secondary outflow pipe, 6- primary overflow pipe, 7- spiral Runner, 8-secondary overflow pipe, 9-small cylindrical overflow hole, 10-large cylindrical overflow hole, 11-streamline outlet hole, 12-lifting cone, 13-secondary outlet branch pipe, 14 - Outflow holes.

Detailed ways

The present utility model will be further described below in conjunction with accompanying drawings 1-8.

As shown in Figures 1-8, this embodiment provides a multi-stage overflow gas-liquid cyclone separation device, including an overflow outlet 1, a mixed-phase liquid inlet 2, a columnar cyclone cavity 3, and a first-stage outflow pipe 4 , secondary outlet pipe 5, primary overflow pipe 6, spiral flow channel 7 and secondary overflow pipe 8. There is an overflow outlet 1 at the top of the axial direction, and the top of the overflow outlet 1 is welded with a flange, which can be used to connect other equipment. The overflow outlet 1 and the first-stage overflow pipe 6 are connected to each other by a flange plate, the overflow outlet 1 and the first-stage overflow pipe 6 are connected with a small cylindrical overflow hole 9, and the spiral flow channel 7 is welded and installed on the first-stage overflow pipe. 6, the secondary overflow pipe 8 is embedded in the primary overflow pipe 6, the secondary overflow pipe 8 communicates with the overflow pipe outlet 1 through the large cylindrical overflow hole 10, and the primary overflow pipe 6 is connected to the spiral flow. The swirl field formed by the channel 7 is embedded in the columnar swirl cavity 3 and is closely connected with the inner wall of the columnar swirl cavity 3 .

The cylindrical cyclone chamber 3 includes a spiral flow channel 7, a primary overflow pipe 6 and a secondary overflow pipe 8, and the secondary overflow pipe 8 is connected to the columnar cyclone separation chamber 3 through a flange plate, and is The end face of the blue plate is provided with a streamline outflow hole 11;

The secondary overflow pipe 8 is provided with a conical screen hole pipe and a long conduit, and the long conduit communicates with the large cylindrical overflow hole 10 .

The end face of the flange plate of the secondary outlet pipe 5 is provided with a lifting cone 12 and an outlet hole 14; one end of the outlet hole 14 is communicated with the secondary outlet pipe 5, and the other end is communicated with the secondary overflow pipe 8 ; The secondary outflow branch pipe 13 and the primary outflow pipe 4 are connected to each other through the flange plate.

One end of the streamline outflow hole 11 communicates with the bottom of the columnar swirl chamber 3 , and the other end communicates with the secondary overflow pipe 8 .

The lifting cone 12 is composed of a long cone end, the lower part is welded and installed on the flange end face of the secondary outlet pipe 5 , and the upper cone tip is flush with the conical screen hole pipe in the secondary overflow pipe 8 .

The liquid inlet 2 of the mixing item is installed with a swirl separation device inclined 30° relative to the axial direction. The end face of the liquid inlet 2 of the mixing item is welded with a flange plate, which can be easily connected with other devices. The first-stage outlet pipe 4 is installed radially At the bottom of the columnar cyclone separation chamber 3 , the external flange is connected with the secondary outflow branch pipe 13 . The columnar cyclone separation chamber 3 and the secondary overflow pipe 8 are connected to each other through a flange, and a streamlined outflow 11 is arranged on the connected flange to communicate the columnar cyclone separation chamber 3 with the secondary overflow pipe 8 , the secondary overflow pipe 8 and the secondary outflow pipe 5 are connected to each other through the flange. The gas-liquid cyclone separator is provided with an overflow circular hole and an overflow groove on the primary overflow pipe 6, so that the gas phase separated by cyclone flow passes through the interior of the primary overflow pipe 6 and passes through the small cylindrical overflow hole 9. The first overflow is carried out, and when there is residual gas phase, the second overflow is carried out through the conical sieve hole on the secondary overflow pipe 8 using the lifting cone 12 to pass the gas phase through the large cylindrical overflow hole 10 . A primary outflow pipe 4 and a secondary outflow branch pipe 13 are arranged at the lower end of the columnar cyclone separation chamber 3 for the first outflow of the liquid phase, and a streamline outflow hole 11 is arranged at the bottom of the columnar cyclone separation chamber 3 to pass through The secondary outflow pipe 5 performs the second outflow to avoid the accumulation of residual liquid phase at the bottom of the columnar swirl chamber 3 . After the secondary overflow is added, the efficiency of the cyclone separation device can reach more than 90%, and it can be further improved.

The composition and working principle of the cyclone separation device are described below:

Figure 2 shows an axial cross-sectional view of a multi-stage overflow gas-liquid cyclone separation device. The internal structure and components of a multi-stage overflow gas-liquid cyclone separation device mainly include a primary overflow pipe 6, a spiral flow channel 7, a secondary overflow Overflow pipe 8 , small cylindrical overflow hole 9 , large cylindrical overflow hole 10 , streamline outlet hole 11 and lift cone 12 . The gas-liquid mixed-phase medium enters the swirl chamber from the liquid inlet 2, and the mixed phase rotates rapidly in the swirl chamber. Under the action of centrifugal force, centripetal buoyancy and fluid drag, the liquid phase adheres to the inner wall of the swirl chamber, and the gas phase gathers. In the axial middle part of the cyclone, the liquid phase is discharged through the secondary outflow pipe 5 , and the gas phase is discharged through the overflow outlet 1 .

Figure 3 is an overall exploded view of a multi-stage overflow gas-liquid cyclone separation device. All parts of the device can be seen from the picture. The overflow outlet 1 is welded with a flange, the mixed phase liquid inlet 2 is welded with a flange, and the secondary outflow pipe 5 is also welded with a flange, in order to facilitate connection with other devices.

4 is a cross-sectional view of the overflow port of a multi-stage overflow gas-liquid cyclone separation device. Both the small cylindrical overflow hole 9 and the large cylindrical overflow hole 10 communicate with the overflow outlet 1 .

Figure 5, Figure 6 and Figure 7 are cross-sectional views of a multi-stage overflow gas-liquid cyclone separation device. These three parts serve as the main body of the cyclone separator and are connected to each other through flanges. The mixed phase enters the swirl field composed of the spiral flow channel 7 and the first-stage overflow pipe 6 through the liquid inlet 2 of the mixing item for cyclonic separation, and the gas phase passes through the overflow hole and the overflow groove on the first-stage overflow pipe 6 and passes through a small space. The cylindrical hole 9 carries out the first overflow, and part of the gas phase passes through the conical screen hole pipe on the secondary overflow pipe 8 to carry out the second overflow through the large cylindrical overflow pipe 10 . The flow line outflow hole 11 communicates the columnar cyclone separation chamber 3 with the secondary overflow pipe 8, and the primary outflow pipe 4 is provided with a flange plate.

8 is a cross-sectional view of the outlet of a multi-stage overflow gas-liquid cyclone separation device. The internal structure and components of a multi-stage overflow gas-liquid cyclone separation device mainly include a lifting cone 12, an outlet hole 14 and a secondary outlet. Flow tube 5. The function of the lifting cone 12 is to give a lifting force to the gas phase. The liquid phase is discharged through the outflow hole 14 and the secondary outflow pipe 5 .

The following describes the operation process of the device:

Referring to Figures 1 to 8, the cyclone uses the principle of centrifugal sedimentation to separate multiphase substances in the flow field. The gas-liquid mixed phase enters the columnar swirl chamber 3 through the mixed phase liquid inlet 2 at a certain speed for rotational flow, and then the mixed phase rotates rapidly in the swirl chamber 3 to form a double-layer fast rotational flow. The outer layer is Swirl downward, inner layer swirl upward.

Due to the different densities between the media, the centrifugal force, centripetal buoyancy and fluid drag force are different in magnitude, forming a strong vortex, which is divided into two parts: underflow and overflow. The underflow is the liquid part, and the overflow is the gas phase. The gas phase overflows for the first time through the small cylindrical overflow hole 9 through the interior of the primary overflow pipe 6, and when there is residual gas phase, the gas phase is passed through the conical sieve hole on the secondary overflow pipe 8 by the lifting cone 12. The cylindrical overflow hole 10 performs the second overflow. The liquid phase is provided with a primary outflow pipe 4 and a secondary outflow branch pipe 13 at the lower end of the columnar cyclone separation chamber 3 for the first outflow of the liquid phase, and a streamline outflow hole is arranged at the bottom of the columnar cyclone separation chamber 3 11 The second outflow is carried out through the secondary outflow pipe 5 .

A multi-stage overflow gas-liquid cyclone separation device proposed by the utility model: the gas phase can be well overflowed by using the secondary overflow, and the liquid phase can be quickly discharged by using the primary outflow pipe and the secondary outflow pipe. , the use of streamline outflow holes can prevent residual liquid phase from accumulating in the cavity, so as to achieve the purpose of improving separation efficiency. The device has the advantages of simple and compact structure, high separation efficiency, strong practicability, and high feasibility.

Although the principle of the present utility has been described in detail above in conjunction with the preferred embodiments of the present utility, those skilled in the art should understand that the above-mentioned embodiments are merely illustrative of the implementation manner of the present utility, and are not intended to limit the scope of the present utility. The details in the embodiments do not constitute a limitation to the scope of the present utility. Without departing from the spirit and scope of the present utility, any obvious changes such as equivalent transformations and simple replacements based on the technical solutions of the present utility will fall within the scope of the present utility model. within the scope of protection.

Claims (7)

1. A multi-stage overflow gas-liquid cyclone separation device, comprising an overflow outlet (1), a mixed-phase liquid inlet (2), a columnar cyclone cavity (3), a primary outlet pipe (4), a secondary The outflow pipe (5), the primary overflow pipe (6), the spiral flow channel (7) and the secondary overflow pipe (8) are characterized in that: There is an overflow outlet (1) at the axial top end, and a flange plate is welded at the top of the overflow outlet (1); the overflow outlet (1) and the first-stage overflow pipe (6) are connected with each other by a flange plate, and the overflow outlet (1) ) is communicated with the primary overflow pipe (6), the spiral flow channel (7) is welded and installed on the primary overflow pipe (6), and the secondary overflow pipe (8) is embedded in the primary overflow pipe (6). ), the secondary overflow pipe (8) communicates with the overflow outlet (1), and the swirl field composed of the primary overflow pipe (6) and the spiral flow channel (7) is embedded in the cylindrical swirl cavity (3) inside, and is closely connected with the inner wall of the columnar swirl chamber (3); The liquid inlet (2) of the mixing item is installed with a swirl separation device inclined 30 ^° relative to the axial direction. The end face of the liquid inlet (2) of the mixing item is welded with a flange plate, and the first-stage outflow pipe (4) is radially installed in the cylindrical shape. At the bottom of the swirl chamber (3), the external flange is connected with the secondary outflow branch pipe (13); the columnar swirl chamber (3) and the secondary overflow pipe (8) are connected to each other through the flange, and are connected to each other through the flange. The connected flange plate is provided with a streamline outflow hole (11) to communicate the columnar swirl chamber (3) with the secondary overflow pipe (8), the secondary overflow pipe (8) and the secondary outflow pipe (8). 5) Connected to each other through flanges. 2. multistage overflow gas-liquid cyclone separation device according to claim 1, is characterized in that: The cylindrical swirl chamber (3) includes a spiral flow channel (7), a primary overflow pipe (6) and a secondary overflow pipe (8), and the secondary overflow pipe (8) is connected to the cylindrical swirl through a flange. The flow chambers (3) are connected with each other, and a flow line outflow hole (11) is opened on the end face of the flange; The secondary overflow pipe (8) is provided with a conical screen hole pipe and a long conduit, and the long conduit communicates with the large cylindrical overflow hole (10). 3. multistage overflow gas-liquid cyclone separation device according to claim 1, is characterized in that: A lift cone (12) and an outflow hole (14) are provided on the end face of the flange plate of the secondary outflow pipe (5); one end of the outflow hole (14) is communicated with the secondary outflow pipe (5), The other end is communicated with the secondary overflow pipe (8); the secondary outlet branch pipe (13) and the primary outlet pipe (4) are connected to each other through a flange plate. 4. multistage overflow gas-liquid cyclone separation device according to claim 2, is characterized in that: One end of the flow line outflow hole (11) is communicated with the bottom of the columnar swirl chamber (3), and the other end is communicated with the secondary overflow pipe (8). 5. multistage overflow gas-liquid cyclone separation device according to claim 3, is characterized in that: The lifting cone (12) is composed of a long cone end, the lower part is welded and installed on the flange end face of the secondary outlet pipe (5), and the upper cone tip is connected with the cone in the secondary overflow pipe (8). The sieve tube is flush. 6. multistage overflow gas-liquid cyclone separation device according to claim 1, is characterized in that: The primary overflow pipe (6) is provided with an overflow circular hole and an overflow groove; the overflow outlet (1) is welded with a flange, the mixed-phase liquid inlet (2) is welded with a flange, and the secondary outlet (1) is welded with a flange. The flow pipe (5) is welded with a flange. 7. multistage overflow gas-liquid cyclone separation device according to claim 1, is characterized in that: Both the small cylindrical overflow hole (9) and the large cylindrical overflow hole (10) communicate with the overflow outlet (1).

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