CN112832733B - Nested gas-liquid-solid cyclone separation device - Google Patents

Abstract

A nested gas-liquid-solid cyclone separation device. It is characterized in that: the outer sleeve contains a gas phase separation module, a liquid phase separation module and a solid phase separation module, and the gas-liquid-solid three-phase mixed liquid enters the cyclone separation device from the liquid inlet of the outer sleeve, and passes through the gas-phase separation module. The nested outer spiral flow channel and inner spiral flow channel allow the gas phase to be discharged preferentially, while the separated liquid phase passes through the spiral flow channel and the backflow control unit in turn, and then flows back into the outer sleeve, and then passes through the liquid phase separation module. Then, the lighter density overflow in the three-phase mixed liquid is discharged, and the sand phase surrounds the inner wall of the outer sleeve and finally passes through the solid phase separation module to separate the sand phase, and the underflow liquid flows out through the inner casing. The cyclone separation device can process the three-phase mixed liquid and realize the single-phase separation of gas phase, solid phase, overflow liquid and underflow liquid.

Description

A nested gas-liquid-solid cyclone separation device

technical field

The invention relates to a gas-liquid-solid three-phase cyclone separation device applied in the fields of petrochemical industry and water treatment.

Background technique

With the continuous exploitation of the oilfield, the problem of sand and gas in the oilfield produced fluid is becoming more and more serious. The gas contained in the produced fluid will not only increase the cost of artificial lift, but also cause the accompanying gas if not properly treated. It has an impact on the environment, and more importantly, it will seriously affect the efficiency of injection-production cyclone separation in the same well of high water-cut oilfields. If the gas contained in the mixed liquid can be collected and recycled, inefficient cyclone separation will be avoided, and at the same time, it will be reduced. On the other hand, the problem of sand content should not be underestimated. A certain amount of sand content will affect the efficiency of separation, and a large amount of sand content will cause siltation and blockage. Therefore, it is necessary to develop gas-liquid-solid three-phase Separation device, usually gas-liquid-solid three-phase separation cyclone uses the density difference between the phases for cyclone separation, such as three-phase separation cyclone, patent number: 2015108694142, the device designed by this invention patent can realize gas-liquid-solid separation The separation of three-phase, but there are still many deficiencies, first of all, the device realizes the helical structure of solid-phase separation is complicated and difficult to realize, and more importantly, the device cannot realize the separation between the underflow and the overflow that are both liquid phases. , which requires the development of a multi-functional cyclone separation device that can not only remove sand, exhaust, separate underflow, and separate overflow.

SUMMARY OF THE INVENTION

The invention provides a nested gas-liquid-solid cyclone separation device. The exhaust mechanism of the device is composed of inner and outer nested spiral flow channels, which realizes precise degassing and returns the overflow liquid through the gradient spiral flow channel. The overflow liquid is discharged, and finally the heavy sand phase is separated according to the principle of density difference separation, which has a strong ability to separate the media of each phase.

The technical scheme of the present invention is that the nested gas-liquid-solid cyclone separator has an outer sleeve, a gas phase separation module, a liquid phase separation module and a solid phase separation module.

The outer sleeve is a cylindrical shape with different outer diameters at both ends and a variable diameter in the middle. The inner walls of both ends are threaded. The liquid inlet and the sand discharge port are distributed at both ends of the outer sleeve and the directions of the openings are opposite. The overflow hole at the middle end is in the same direction as the inlet port;

The gas phase separation module includes an external spiral flow channel, a built-in spiral flow channel, a stepped sealing plate, an exhaust pipe, an outer end sealing plate, a built-in spiral flow channel positioning unit and a backflow control unit; the main structure of the external spiral flow channel There are inner gas core hole, inner ring cylinder, deliquoring hole, positioning hole, reinjection hole, steady flow tube, protective cover, built-in spiral flow channel is placed in the inner ring cylinder, a total of 3 rows of deliquoring holes are distributed on the surface of the inner ring cylinder And there are 4 deliquification holes in each row. The positioning holes cooperate with the dome positioning pin holes to realize the positioning of the built-in spiral flow channel, and the reinjection hole is threadedly connected with the shrinking through column; Conical thread connection, three through holes are distributed around the inner wall of the central hole, the stepped sealing disc is threadedly connected with the external spiral flow channel, and the central circular hole of the stepped sealing disc is threadedly connected to the exhaust pipe; one end of the exhaust pipe is connected to the exhaust pipe. The stepped sealing disc is threadedly connected, and the other end is threadedly connected with the outer end sealing disc; the outer end sealing disc is threadedly connected with the outer sleeve, and a through hole is opened in the center to be threadedly connected with the exhaust pipe, and the built-in spiral flow channel The positioning unit includes a dome positioning pin and a positioning shunt cone, the dome positioning pin slides in the built-in helical flow through hole; the positioning shunt cone is threadedly connected with the built-in helical flow channel; the backflow control unit includes a shrinkage through column, The choke cover, the impact cone and the tightening ring, one end of the shrinking through column is threadedly connected with the reinjection hole in the external spiral flow channel, and the other end face has 4 through holes equally spaced around the circumference; the main structure of the choke cover has the main The sliding rod, the auxiliary sliding rod, the inner end faces of the 4 secondary sliding rods are distributed around the circumference and are matched with the matching holes of the tightening ring on the end face of the shrinking through-column; The fastening ring is a cylinder with a hole at one end, the inner hole wall is threaded and connected with the auxiliary sliding rod of the choke cover;

The liquid phase separation module includes a gradient spiral flow channel and an overflow pipe. The two sections of the gradient spiral channel have different inclination angles, and an axial hole is opened on its axis and a vertical hole is opened in the vertical axis direction. The overflow pipe is threaded into the vertical hole of the gradient spiral flow channel;

The solid phase separation module includes an inner casing and a threaded bottom cone. The main structure of the inner casing includes a sand separator, an underflow tube and a petal turning handle. The interior is a transparent cavity, and the opposite end face of the sand separator is provided with a bottom cone. The matching hole is threaded on its inner wall, and the outer surface of the inner sleeve is provided with a thread and is threadedly connected with the outer sleeve. It is a concave ball, and the threaded bottom cone is threadedly connected to the inner casing;

The gas phase separation module is threadedly connected with a section of the exhaust pipe, the other end of the exhaust pipe is threadedly connected with the outer end sealing disk, and the outer end sealing disk is threadedly connected to the outer sleeve; the vertical hole in the gradient spiral flow channel is threaded with the overflow pipe thread The overflow pipe is threadedly connected to the overflow hole on the outer sleeve; the inner sleeve is threadedly connected to the outer sleeve, and the threaded bottom cone is threadedly connected to the inner sleeve.

The invention has the following beneficial effects: the device utilizes the density difference between the phases to carry out cyclone separation, which can realize the separation of gas phase, sand phase, overflow and underflow, and the gas-liquid-solid three-phase mixed liquid flows through the external spiral flow channel to produce strong The swirling flow makes the light gas phase and part of the overflow flow into the gas phase separation module. The gas phase separation module is mainly composed of inner and outer spiral flow channels. The cam mechanism is used as the actuator of the built-in spiral flow channel positioning unit. The flow is discharged through the exhaust pipe, and the rest of the overflow flows from the deliquoring hole into the inner cavity of the external spiral flow channel and then flows into the outer sleeve through the reflux control unit. The reflux control unit effectively controls the liquid reflux according to the fluid pressure, and discharges the solid-liquid after the gas phase The mixed phase passes through the liquid phase separation module to generate a strong swirling flow, so that the overflow is completely discharged through the gradient spiral flow channel, and the sand phase of the heavy phase surrounds the inner wall of the outer sleeve. The casing realizes its linear movement, and the size of the inlet passage (sand phase inlet) in the middle section of the inner casing and the outer casing is adjusted, so that the sand phase flows into the annular cavity of the inner casing and the outer casing and is discharged through the sand discharge port of the outer casing, and the underflow liquid is discharged. After passing through the inner cavity of the inner sleeve, it flows out from the underflow tube.

The details are as follows:

First of all, the nested gas-liquid-solid cyclone separator has a beautiful appearance and structure, and is innovative in terms of functional versatility. The process still maintains efficient separation of overflow liquid and underflow liquid.

Secondly, the backflow control unit of the nested gas-liquid-solid cyclone has a simple structure, but it can achieve powerful functions. It cleverly uses the pressure difference between the liquids so that the liquid flowing out of the deliquoring hole can flow into the backflow control unit through the backflow control unit. inside the outer sleeve to avoid reverse inflow of liquid in the outer sleeve.

Thirdly, the device uses the secondary swirling flow generated by the inner and outer nested spiral flow channels to discharge the gas for the first time, and minimizes the liquid content in the exhaust gas. It plays an important role in stabilizing the backflow control unit.

Then, the gradient spiral flow channel and the built-in spiral flow channel of the nested gas-liquid-solid cyclone separation device adopt a new type of variable cone angle flow channel, and the effective flow area of the liquid at the end of the flow channel is much smaller than the initial end area. , so the liquid flows faster at the end of the unit time, which will generate strong spin force, which is beneficial to the separation of each phase. In addition, the cam mechanism is innovatively applied to realize the positioning of the built-in helical flow channel.

Finally, the nested gas-liquid-solid cyclone separator can adjust the sand removal ratio according to actual needs, and adjust the effective length of the inner casing in the outer casing by rotating the inner casing, thereby indirectly controlling the sand separator and the middle section of the outer casing The size of the flow area of the annular inlet (that is, the sand phase inlet) can adjust the length of the inner casing according to the actual sand removal requirements. When the effective length of the inner casing in the outer casing is the shortest, the sand cannot be removed, which avoids the underflow liquid under the condition of no sand. And the threaded bottom cone can also adjust its length in the inner casing to adjust the effective length of the overflow core at the axis.

To sum up, the nested gas-liquid-solid cyclone separation device proposed by the present invention can realize the separation of each phase of the gas-liquid-solid three-phase mixed liquid, and can also carry out the separation of overflow and underflow at the same time, which is innovative. The built-in spiral flow channel is placed inside the external spiral flow channel to form a nested combination, and the liquid contained in the gas is fully separated and refluxed, so that the amount of liquid attached to the exhaust gas is greatly reduced, and the refluxed liquid flows into the outer sleeve through the reflux control unit. After passing through the gradient spiral flow channel, the gradual reduction of the effective flow area of the gradient spiral flow channel will generate strong swirling flow and make all the overflow flow out of the overflow pipe, and the inner casing can be dynamically adjusted according to the actual sand content. The inner length of the cylinder indirectly changes the flow area of the sand phase inlet. When the inner casing is in the outer sleeve with the smallest length, it is a gas-liquid cyclone separator, which has strong practical applicability and cannot be realized by the previous gas-liquid-solid separation devices. The separation of overflow and underflow is fixed and the structure is fixed, but the present invention can realize all separation of gas phase, sand phase, overflow and underflow, and the inner casing can be rotated when sand removal is not required.

Description of drawings:

Figure 1 shows the overall appearance of the nested gas-liquid-solid cyclone separator.

Figure 2 is an exploded view of the nested gas-liquid-solid cyclone separator.

3 is a cross-sectional view of a nested gas-liquid-solid cyclone separator.

Figure 4 is a structural diagram of the outer sleeve.

Fig. 5 is an external view of the gas phase separation module assembly.

Figure 6 is an exploded view of the gas phase separation module assembly.

7 is a cross-sectional view of a gas phase separation module assembly.

8 is a cross-sectional view of an external spiral flow channel.

FIG. 9 is an end sectional view of an external spiral flow channel.

Figure 10 is a structural diagram of a built-in spiral flow channel.

Figure 11 is a structural diagram of the positioning diverter cone.

FIG. 12 is a schematic diagram of the positioning completion of the built-in spiral flow channel positioning unit.

Figure 13 is a schematic diagram of the positioning cancellation of the built-in spiral flow channel positioning unit.

FIG. 14 is a structural diagram of a stepped sealing disc.

FIG. 15 is a structural diagram of an exhaust pipe.

Figure 16 is a structural diagram of the outer end sealing disc.

Figure 17 is an overall assembly view of the backflow control unit.

Figure 18 is an exploded view of the backflow control unit.

FIG. 19 is an overall cross-sectional view of the backflow control unit.

FIG. 20 is a structural diagram of a shrink-through column.

FIG. 21 is a structural diagram of a spoiler cover.

Figure 22 is a cross-sectional view of the interior of the impact cone.

Figure 23 is a structural diagram of a gradient spiral flow channel.

FIG. 24 is a cross-sectional view of a gradual spiral flow channel.

Figure 25 is a structural diagram of an overflow pipe.

Figure 26 is a structural diagram of the inner sleeve.

Figure 27 is a structural diagram of a threaded bottom cone.

Figure 28 is a schematic diagram of the separation of the solid phase separation module when a small amount of sand phase is contained.

Figure 29 is a schematic diagram of the separation of the solid phase separation module when a large amount of sand phase is contained.

Figure 30 is a schematic diagram of the separation of the solid phase separation module when there is no sand phase.

In the figure 1-outer sleeve, 2-gas phase separation module, 3-liquid phase separation module, 4-solid phase separation module, 5-external spiral flow channel, 6-internal spiral flow channel, 7-step sealing plate, 8- Exhaust pipe, 9-outer end sealing disc, 11-return control unit, 12-dome positioning pin, 13-positioning diverter cone, 14-shrinking through column, 15-blocking cover, 16-impact cone, 17-tightening Fixed ring, 18-gradient spiral flow channel, 19-overflow pipe, 20-inner casing, 21-thread bottom cone, 22-liquid inlet, 23-sand outlet, 24-overflow hole, 25-inner gas Nuclear hole, 26-inner ring cylinder, 27-dehydration hole, 28-positioning hole, 29-reinjection hole, 30-steady flow pipe, 31-protective cover, 32-exhaust pipe matching hole, 33-through long hole , 34- Fastening ring matching hole, 35- Main sliding rod, 36- Secondary sliding rod, 37- Axial hole, 38- Vertical hole, 39- Sand separator, 40- Bottom flow pipe, 41- Bottom cone matching hole , 42-petal stalk, 43-concave ball.

Detailed ways:

The present invention will be further described below in conjunction with the accompanying drawings:

The overall appearance of this nested gas-liquid-solid cyclone separator is shown in Figure 1. The gas-liquid-solid three-phase mixed liquid enters the outer sleeve 1 from the liquid inlet 22 for separation, and the gas phase is discharged through the exhaust pipe 8. The phase is discharged from the sand discharge port 23 , the overflow liquid is discharged through the overflow pipe 19 , and the underflow liquid is discharged through the underflow pipe 40 . The exploded diagram of the nested gas-liquid-solid cyclone separator is shown in Figure 2. It is mainly composed of an outer sleeve 1, a gas-phase separation module 2, an exhaust pipe 8, an outer end sealing disc 9, a gradient spiral flow channel 18, and an overflow pipe. 19. The inner sleeve 20 and the threaded bottom cone 21 are composed. 3 is a cross-sectional view of the nested gas-liquid-solid cyclone separator. The gas-liquid-solid three-phase mixed liquid enters from the liquid inlet 22 and then passes through the gas-phase separation module 2 in turn, so that the gas is discharged from the exhaust pipe 8 and passes through the liquid-phase separation module. 3. The overflow is discharged through the overflow pipe 19, and the solid phase is discharged from the sand discharge port 23 through the solid phase separation module 4. 4 is a structural diagram of the outer sleeve 1, one end face of the liquid inlet 22 is threadedly connected to the outer end sealing disc 9, and the overflow hole 24 at the middle end of the outer sleeve 1 cooperates with the overflow pipe 19 to locate the liquid phase separation module 3 .

FIG. 5 is an external view of the assembly of the gas phase separation module 2 . The exploded view of the assembly of the gas phase separation module 2 is shown in Figure 6, which mainly consists of an external spiral flow channel 5, a built-in spiral flow channel 6, a stepped sealing plate 7, an exhaust pipe 8, a return control unit 11, a dome positioning pin 12, The positioning shunt cone 13 is composed. The cross-sectional view of the assembly of the gas phase separation module 2 is shown in Figure 7. The backflow control unit 11 is threadedly connected to the external spiral flow channel 5, the built-in spiral flow channel 6 is assembled inside the external spiral flow channel 5, and the positioning split cone 13 controls the built-in spiral flow channel. For the positioning of the flow channel 6 , the stepped sealing plate 7 is threadedly connected with the external spiral flow channel 5 to seal the interior of the external spiral flow channel 5 , and the exhaust pipe 8 is threadedly connected with the stepped sealing plate 7 so that the gas phase is discharged through the exhaust pipe 8 . 8 is a sectional view of the external spiral flow channel 5. The gas and partial overflow of the light phase enter the inner ring cylinder 26 of the external spiral flow channel 5 through the inner gas core hole, and the built-in spiral flow channel 6 is assembled into the inner ring tube 26 so that The entering gas-liquid mixed phase is swirled twice, so the liquid content of the separated gas phase is greatly reduced and discharged through the exhaust pipe 8, and the remaining liquid phase is swirled to the inner wall of the inner ring cylinder 26 and flows into the reflux through the deliquoring hole 27. The control unit 11 is returned to the inside of the outer sleeve 1. The steady flow tube 30 can stabilize the pressure of the flow field near the backflow control unit 11 and reduce the liquid backflow resistance. The convection pressure on the unit 11 weakens the frontal impact force on the backflow control unit 11 , and the dome positioning pin 12 cooperates with the positioning hole 28 to realize the positioning of the built-in spiral flow channel 6 . FIG. 9 is a cross-sectional view of the end surface of the external spiral flow channel 5. The reinjection holes 29 and the steady flow tube 30 are both four and are circumferentially distributed on the same end surface of the external spiral flow channel. The structure diagram of the built-in spiral flow channel 6 is shown in Figure 10. The end face is provided with a central hole and is threadedly connected to the positioning tap 13. The inner wall of the circular hole is distributed with three transparent long holes 33 for the positioning of the dome positioning pin 12. slide. Figure 11 is a structural diagram of the positioning shunt cone 13, the end of which is threadedly connected to the built-in spiral flow channel 6, the cam structure at the bottom is used to control the positioning of the built-in spiral flow channel 6, and the groove at the top is used as the focus point of the rotational drive. The initial installation schematic diagram and positioning schematic diagram of the built-in spiral flow channel positioning unit are shown in Figures 12 and 13. The dome positioning pin 12 is located in the transparent long hole 33 in the built-in spiral flow channel 6, so that the dome positioning pin 12 can realize reciprocating expansion and contraction, After aligning the relative concave part of the cam at the bottom of the positioning shunt cone 13 with the dome of the dome positioning pin 12 on the same horizontal line, rotate the positioning shunt cone 13 half a circle clockwise to make the convex end of the cam contact the dome of the dome positioning pin 12. This process The positioning pin 12 of the dome is lifted to fit into the positioning hole 28 of the external spiral flow channel 5 , so that the positioning of the built-in spiral flow channel can be realized. 14 is a structural diagram of the stepped sealing disc 7 . The stepped sealing disc 7 is threadedly connected with the external spiral flow channel 5 to realize the sealing of the external spiral flow channel 5 , and the central circular hole of the stepped sealing plate 7 is threadedly connected with the exhaust pipe 8 . 15 is a structural diagram of the exhaust pipe 8 , the threaded end of the exhaust pipe 8 is screwed with the stepped sealing disc 7 , and the other end is screwed with the outer end sealing disc 9 . 16 is a structural diagram of the outer end sealing disc 9. The outer end sealing disc 9 is threadedly connected to the outer sleeve 1 to seal the outer sleeve 1, and the axial exhaust pipe fitting hole 32 is threadedly connected to the exhaust pipe 8 to separate the gas phase module. 2 is fixed with the outer sleeve 1.

FIG. 17 is an overall assembly view of the backflow control unit 11 . The backflow control unit 11 is screwed into the refill hole 29 of the external spiral flow channel 5 . FIG. 18 is an exploded view of the backflow control unit 11 , which is mainly composed of a shrinking through-column 14 , a spoiler cover 15 , an impact cone 16 , and a fastening ring 17 . 19 is an overall cross-sectional view of the backflow control unit 11. The backflow liquid phase passes through the shrinking through-column 14, and then hits the choke cover 15 under the action of the liquid pressure, so that the auxiliary sliding rod 36 slides in the fitting hole 34 of the fastening ring, so that the flow resistance is blocked. The gap between the cover 15 and the shrinking through-column 14 becomes larger to discharge the liquid phase that needs to be returned. The tightening ring 17 is used to prevent the auxiliary sliding rod 36 from disengaging from the matching hole 34 of the tightening ring during the sliding process. If the external flow field pressure of the return control unit 11 When the pressure is greater than the internal pressure, the external liquid phase flows into the choke cover 15 through the gap between the choke cover 15 and the shrinking column 14, and then the liquid phase will exert pressure on the bottom end face of the impact cone 16, at this time the impact cone 16 drives the main sliding rod 35 slides in the reverse direction, so that the gap between the choke cover 15 and the shrinkage column 14 becomes smaller, effectively isolating the external liquid from entering the backflow control unit 11, until the liquid reflux pressure is greater than the external liquid phase pressure to restore the choke cover 15 and the shrinkage column 14 normal clearance. FIG. 20 is a structural diagram of the shrinking through-column 14 . The shrinking through-column 14 is threadedly connected to the return injection hole 29 to fix the backflow control unit 11 and the external spiral flow channel 5 . 21 is a structural diagram of the spoiler hood 15 . The inner end surfaces of the four auxiliary sliding rods 36 are circumferentially distributed and fit with the fastening ring fitting holes 34 on the end face of the shrinking column 14 . The main sliding rod 35 is threadedly connected to the impact cone 16 . Figure 22 is a cross-sectional view of the interior of the impact cone 16. The bottom end face of the choke cover 15 can dynamically adjust the gap between the choke cover 15 and the shrinking column 14 according to the actual pressure inside and outside the backflow control unit 11. The interior of the impact cone 16 is a cavity so that its own weight does not Affects the sliding adjustment process of the impact cone 16 .

The structure diagram of the gradient spiral flow channel 18 is shown in Figure 23. The gradient spiral cone channel can make the mixed liquid generate greater spin force. 24 is a cross-sectional view of the gradient spiral flow channel 18. The overflow pipe 19 is threadedly connected to the vertical hole 38 of the gradient spiral channel 18, and the overflow liquid is discharged through the axial hole 37 and the vertical hole 38 in turn. FIG. 25 is a structural diagram of the overflow pipe 19 , which is threadedly connected to the vertical hole 38 in the gradual spiral flow channel 18 , and the other section is threadedly connected to the overflow hole 24 of the outer sleeve 1 to locate the liquid phase separation module 3 . 26 is a structural diagram of the inner casing 20. The sand separator 39 plays the role of separating the sand phases and liquid phases of different densities in the mixed liquid. The relatively light phase underflow liquid enters the inner cavity of the inner casing 20 and passes through the underflow pipe. 40 is discharged, the inner casing 20 is threadedly connected with the outer casing 1, and the linear movement of the inner casing 20 is realized by rotating the petal handle 42 to change the size of the passage between the sand separator 39 and the outer casing 1 (sand phase inlet), To achieve precise control of different sand content treatment, the bottom cone matching hole and the threaded bottom cone 21 are threadedly connected. 27 is a structural diagram of the threaded bottom cone 21, the threaded bottom cone 21 is threadedly connected to the inner sleeve 20, and the effective length of the threaded bottom cone 21 inside the inner sleeve 20 is adjusted by rotating the concave ball 43, which improves the separation efficiency. The schematic diagram of the separation of the solid phase separation module 4 when there is a small amount of sand phase is shown in Figure 28. The heavy sand phase adheres to the inner wall of the outer casing 1 under the action of the rotational force, and then enters the annular cavity between the outer casing 1 and the inner casing 20. It is discharged through the sand discharge port 23, and the relatively light underflow liquid is screwed into the inner casing 20 and discharged through the underflow pipe 40. Both the inner casing 20 and the threaded bottom cone 21 can be independently adjusted freely, and the isolation of the inner casing 20 is guaranteed. The sand removal function can be realized when the sand disc 39 is in the variable diameter section of the middle section of the outer sleeve 1. The effective length of the inner sleeve 20 inside the outer sleeve 1 can be changed by rotating the petal handle 42, and the threaded bottom cone can be changed by rotating the concave ball 43. 21 is the effective length inside the inner sleeve 20 . Figure 29 is a schematic diagram of the separation of the solid phase separation module 4 when a large amount of sand is contained. At this time, the effective length of the rotating inner casing 20 inside the outer casing 1 is the largest. It can be seen from the comparison that the inner casing 20 has a sand barrier 39 and the outer casing. The gap between 1 (sand phase inlet) becomes significantly larger, so more sand phase is separated. Figure 30 is a schematic diagram of the separation of the solid phase separation module 4 when there is no sand phase. When the rotating inner casing 20 is at the minimum effective length inside the outer casing 1, the sand separating disc 39 is screwed into the cylindrical part at the bottom end of the outer casing 1, and the outer The diameter of the end is the same as the diameter of the bottom end of the outer sleeve 1 . At this time, the sand phase inlet is closed, and all the underflow liquid is discharged from the underflow pipe 40 through the inner cavity of the inner sleeve 20 .

The nested gas-liquid-solid multiphase integrated cyclone separation device proposed by the present invention can perform gas-liquid-solid three-phase separation under complex flow field conditions and still achieve effective separation between underflow liquid and overflow liquid Separation, compared with the conventional degassing device, the innovative use of inner and outer nested variable cone section flow channels greatly reduces the liquid content in the discharged gas phase. The cam mechanism is used as the control mechanism of the built-in spiral flow channel positioning unit, which is easy to operate and accurate. , the backflow control unit can effectively control the liquid backflow according to the internal and external hydraulic pressure, and the solid phase separation module can also be dynamically adjusted according to the actual sand content to minimize the separated solid and liquid content, and can be turned off under the condition of no sand phase. The solid phase separation module enables the entire device to only separate between gas and liquid phases, which greatly improves the actual separation efficiency and avoids the ineffective discharge of the underflow liquid.

Claims (1)

1. A nested gas-liquid-solid cyclone separation device, comprising an outer sleeve (1), characterized in that: The device further comprises a gas phase separation module (2), a liquid phase separation module (3) and a solid phase separation module (4); The outer sleeve (1) is cylindrical with different diameters at both ends and a variable diameter in the middle, the inner walls of both ends are threaded, and the liquid inlet (22) and the sand discharge port (23) are distributed in the outer sleeve (1) The two ends and the direction of the port are opposite, and the overflow hole (24) at the middle end of the outer sleeve (1) is in the same direction as the port of the liquid inlet; The gas phase separation module (2) comprises an external spiral flow channel (5), a built-in spiral flow channel (6), a stepped sealing disc (7), an exhaust pipe (8), an outer end sealing disc (9), a built-in spiral A flow channel positioning unit and a backflow control unit (11); the external spiral flow channel (5) has an inner gas core hole (25), an inner ring cylinder (26), a deliquoring hole (27), and a positioning hole (28) , reinjection hole (29), steady flow pipe (30) and protective cover (31); a built-in spiral flow channel (6) is placed in the inner ring cylinder (26), a total of 3 rows of deliquoring holes are distributed on the surface of the inner ring cylinder and There are 4 deliquoring holes in each row, the positioning holes (28) cooperate with the holes of the dome positioning pin (12) to realize the positioning of the built-in spiral flow channel (6), and the re-injection hole (29) is threadedly connected with the shrinking through column (14); The end face of the built-in helical flow channel (6) is provided with a central hole and is threadedly connected to the positioning tap (13). The inner wall of the central hole has three transparent long holes distributed around the circumference. The stepped sealing disc (7) is connected to the external spiral The flow channel (5) is threadedly connected, and the central circular hole of the stepped sealing plate (7) is threadedly connected to the exhaust pipe (8); one end of the exhaust pipe (8) is threadedly connected to the stepped sealing plate (7), and the other end is The end sealing disc (9) is threadedly connected; the outer end sealing disc (9) is threadedly connected with the outer sleeve (1), and the axial exhaust pipe fitting hole (32) is threadedly connected with the exhaust pipe (8) ; the built-in spiral flow channel positioning unit comprises a dome positioning pin (12) and a positioning diverter cone (13), the dome positioning pin (12) is in the built-in spiral flow channel (6) through the long hole (33) sliding; the positioning diverter cone (13) is threadedly connected with the built-in helical flow channel (6); the backflow control unit (11) includes a shrinking through-column (14), a spoiler cover (15), an impact cone (16) and A tightening ring (17), one end of the shrinking through-column (14) is threadedly connected to the inner reinjection hole (29) of the external spiral flow channel (5), and four tightening ring matching holes ( 34); the spoiler cover (15) has a main sliding rod (35) and an auxiliary sliding rod (36), and the inner end faces of the four auxiliary sliding rods (36) are circumferentially distributed and fastened to the end face of the shrinking through-column (14). The ring matching hole (34) is matched; the center hole of the bottom end face of the impact cone (16) is threadedly connected with the main sliding rod (35) in the spoiler cover (15); the fastening ring (17) is a cylinder with an opening at one end body, the inner hole wall is threaded and connected with the auxiliary sliding rod (36) of the spoiler cover (15) by thread; The liquid phase separation module (3) includes a gradient spiral flow channel (18) and an overflow pipe (19). an axial hole (37), and a vertical hole (38) opened in the vertical axis direction; The solid phase separation module (4) includes an inner casing (20) and a threaded bottom cone (21), and the inner casing (20) is provided with a sand separator (39), an underflow pipe (40), and a bottom cone matching hole (41) and the petal turning handle (42), the interior is a transparent cavity, the opposite end face of the sand separator (39) is provided with a bottom cone matching hole (41) and is threaded on its inner wall, the outer surface of the inner sleeve (20) A section of thread is opened and connected with the outer sleeve (1) threadedly, the front end of the threaded bottom cone (21) is a cone, the middle end is cylindrical, a section of thread is formed on the surface, and the rear end is a concave ball (43). The bottom cone (21) is screwed together with the inner sleeve (20); The gas phase separation module (2) is threadedly connected to the exhaust pipe (8), and the other end of the exhaust pipe (8) is threadedly connected to the outer end sealing disk (9), and the outer end sealing disk (9) is threadedly connected to the outer end sealing disk (9). Sleeve (1); the vertical hole (38) in the gradient spiral flow channel (18) is threadedly connected to the overflow pipe (19), and the overflow pipe (19) is threadedly connected to the overflow hole on the outer sleeve (1) (24); the inner sleeve (20) is threadedly connected to the outer sleeve (1), and the threaded bottom cone (21) is threadedly connected to the inner sleeve (20).

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