Three-phase separator with excellent sand discharging effect

Abstract

The utility model discloses a three-phase separator with a better sand discharge effect, which relates to the field of three-phase separator structures and comprises a barrel with a sand deposition cavity, a material inlet is arranged at the top of the sand deposition cavity, a sand washing pipe is arranged in the sand deposition cavity, a pipe inlet of the sand washing pipe is positioned outside the barrel, and a material outlet of the sand washing pipe is positioned outside the barrel. A plurality of sand washing nozzles are arranged on the sand washing pipe part positioned in the cylinder body; a sand storage chamber is arranged at the bottom of the sand deposition cavity, a sand storage space of the sand storage chamber is lower than the bottom of the sand deposition cavity, and a sand discharging opening is formed in the bottom of the sand storage chamber. Sand deposited in the three-phase separator can be effectively discharged, and the service life and the processing capacity of the three-phase separator are guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of three-phase separator structures, in particular to a three-phase separator with better sand discharge effect. Background Art

[0002] With the advancement of natural gas extraction, especially the large-scale extraction of shale gas, the water content and sand content of the extracted natural gas have gradually increased, resulting in a continuous increase in the processing load of the ground gathering and transportation process and an increase in management and operation costs.

[0003] At present, domestic and foreign oil and gas fields mainly use ordinary three-phase separators to separate gas, liquid and oil for oil-water pretreatment of wellhead produced fluid. The sand discharge of ordinary three-phase separators is intermittent, that is, it takes a period of time after the last sand discharge to discharge sand again; as the amount of sand increases, the sand in the three-phase separator is prone to compaction, and the compacted sand is not easy to discharge, resulting in difficulty in sand discharge, and it is often necessary to manually enter the separator to remove the compacted sand; of course, there are also three-phase separators with continuous sand discharge in this field, and the sand compaction is less common in three-phase separators with continuous sand discharge, but there are still sand particles attached to the inner wall of the cylinder (the reason is that the water flow intensity is insufficient during sand discharge, and the sand particles cannot flow out of the three-phase separator).

[0004] Therefore, a three-phase separator with better sand removal effect is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a three-phase separator with better sand discharge effect in view of the above-mentioned problems, which can effectively discharge the sand deposited in the three-phase separator and ensure the service life and processing capacity of the three-phase separator.

[0006] The technical solution adopted by the utility model is as follows: a three-phase separator with better sand discharge effect, comprising a cylinder with a sand deposition chamber, a material inlet is opened at the top of the sand deposition chamber, a sand flushing pipe is arranged in the sand deposition chamber, the pipe inlet of the sand flushing pipe is located outside the cylinder, and a plurality of sand flushing nozzles are arranged on the part of the sand flushing pipe located inside the cylinder; a sand storage chamber is arranged at the bottom of the sand deposition chamber, the sand storage space of the sand storage chamber is lower than the bottom of the sand deposition chamber, and a sand discharge port is arranged at the bottom of the sand storage chamber.

[0007] Further, the sand flushing nozzle is installed in a posture facing the sand deposition chamber.

[0008] Furthermore, the sand flushing pipe surrounds the inner wall of the sand deposition chamber in the same horizontal section.

[0009] Furthermore, the plurality of sand flushing nozzles are evenly arranged along the axis of the sand flushing pipe.

[0010] Furthermore, the sand flushing nozzle is tangentially attached to the inner wall of the cylinder.

[0011] Furthermore, the structure of the sand storage chamber includes a straight cylinder and a spherical head, the spherical head seals one end of the straight cylinder, and the other end of the straight cylinder is fixedly connected to the cylinder body as a sand inlet, and the diameter of the sand inlet is smaller than the bottom size of the sand deposition chamber.

[0012] Furthermore, the sand discharge port is provided with a sand discharge valve.

[0013] Furthermore, a distributor is provided at the material inlet, and the distributor is communicated with the material inlet and is located downstream of the material inlet.

[0014] Furthermore, the outlet of the distributor is attached to the inner wall of the cylinder and is not perpendicular to the surface where the inner wall of the cylinder is located.

[0015] Furthermore, a wave-proof baffle is arranged between the sand deposition chamber and other spaces inside the cylinder, and a sand-blocking portion is provided on the wave-proof baffle, and a side surface of the sand-blocking portion is in contact with the bottom of the cylinder.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0017] 1. The sand flushing pipe provided in the utility model can flush the sand deposited in the sand deposition chamber, so that the sand particles attached to the inner wall of the cylinder can be effectively discharged, and the sand particles are promoted to be discharged through the sand discharge port;

[0018] 2. The utility model is provided with a sand storage chamber to temporarily store the sand deposited in the sand deposition chamber, thereby increasing the interval time of sand discharge, and does not require the operator to frequently open the sand discharge valve; and the damage of the sand to the inner wall of the cylinder is converted into damage to the inner wall of the sand storage chamber. During maintenance, only the sand storage chamber needs to be repaired, thereby reducing the maintenance cost;

[0019] 3. The sand storage chamber provided in the utility model is lower than the bottom of the cylinder. The existence of the sand storage chamber deepens the depth. When the sand is flushed by the sand flushing pipe, it is easier to form a vortex and flow to the sand storage chamber. The vortex can increase the amount of sand carried when the sand is discharged, so that the sand can be flushed quickly and more easily, especially for the hardened sand. It can also be effectively flushed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0021] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model in a top view;

[0023] Figure 3 Schematic diagram of the relative position of the sand blasting nozzle and the inner wall of the cylinder.

[0024] Markings in the figure: 1-cylinder; 11-sand deposition chamber; 12-distributor; 13-sand flushing pipe; 14-sand flushing nozzle; 15-sand storage chamber; 16-sand discharge port; 17-material inlet; 2-wave baffle; 21-sand retaining part. DETAILED DESCRIPTION

[0025] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0026] Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0027] Example 1

[0028] like Figure 1-Figure 3 As shown, a three-phase separator with better sand discharge effect includes a cylinder 1 with a sand deposition chamber 11, the cylinder 1 is horizontal, and the sand deposition chamber 11 is located at the end of the cylinder 1; a material inlet 17 is opened at the top of the sand deposition chamber 11, and the fluid enters the cylinder 1 from the material inlet 17; a sand flushing pipe 13 is arranged in the sand deposition chamber 11, and the pipe inlet of the sand flushing pipe 13 is located outside the cylinder 1, and the pipe inlet can be connected to an external water source, and the part of the sand flushing pipe 13 located in the cylinder 1 is provided with a plurality of sand flushing Nozzle 14, the water for sand flushing enters the sand flushing pipe 13 and is sprayed out from the sand flushing nozzle 14, flushing the sand particles attached to the inner wall of the sand deposition chamber 11, so as to achieve a cleaning effect and reduce the sand corrosion to the inner wall of the cylinder 1; a sand storage chamber 15 is arranged at the bottom of the sand deposition chamber 11, and the sand storage space of the sand storage chamber 15 is lower than the bottom of the sand deposition chamber 11, and a sand discharge port 16 is arranged at the bottom of the sand storage chamber 15; the flushed sand enters the sand storage chamber 15, and the sand in the sand storage chamber 15 is discharged through the sand discharge port 16.

[0029] In the present embodiment, the sand storage chamber 15 can temporarily store the sand deposited in the sand deposition chamber 11, thereby increasing the interval time of sand discharge, and the operator does not need to frequently open the sand discharge valve; and the damage caused by the sand to the inner wall of the cylinder 1 is converted into damage to the inner wall of the sand storage chamber 15. During maintenance, only the sand storage chamber 15 needs to be repaired, thereby reducing the maintenance cost; the sand storage chamber 15 is lower than the bottom of the cylinder 1, and the existence of the sand storage chamber 15 deepens the depth. When the sand is flushed by the sand flushing pipe 13, it is easier to form a vortex and flow to the sand storage chamber 15. The vortex can increase the amount of sand carried during sand discharge, so that the sand can be quickly and easily flushed, especially for the hardened sand.

[0030] Example 2

[0031] Based on Example 1, a specific implementation method that can be implemented is further proposed.

[0032] A feasible implementation manner is that the sand flushing nozzle 14 is installed in a posture facing the sand deposition chamber 11, so that the sand is directly subjected to the flushing force of the sand flushing nozzle 14 toward the bottom of the sand deposition chamber 11, promoting the sand attached to the inner wall of the cylinder 1 to flow to the bottom of the sand deposition chamber 11; compared with the sand flushing nozzle 14 facing the top of the sand deposition chamber 11, the influence of the sand flushing water on the liquid phase located in the sand deposition chamber 11 is reduced.

[0033] A feasible implementation manner, as shown in the figure, the sand flushing pipe 13 surrounds the inner wall of the sand deposition chamber 11 in the same horizontal section, and flushes the sand in the sand deposition chamber 11 in all directions along the ring, thereby improving the comprehensiveness of the flushed sand.

[0034] In a feasible implementation manner, a plurality of sand flushing nozzles 14 are evenly arranged along the axis of the sand flushing tube 13 to improve uniformity and ensure that the sand attached to each position on the inner wall of the cylinder 1 is subjected to the same flushing force.

[0035] In a feasible implementation manner, as shown in the figure, the sand flushing nozzle 14 is tangentially attached to the inner wall of the cylinder 1, so as to further improve the comprehensiveness of the sand flushing and reduce the generation of dead corners.

[0036] A feasible implementation manner, as shown in the figure, the structure of the sand storage chamber 15 includes a straight cylinder and a spherical head, the spherical head closes one end of the straight cylinder, and the other end of the straight cylinder is fixedly connected to the cylinder body 1 as a sand inlet, and the diameter of the sand inlet is smaller than the bottom size of the sand deposition chamber 11; the shape design and position design of the sand storage chamber 15, so that the sand is constrained by the inner wall of the sand storage chamber 15, and the sand that has been deposited is reduced to be entrained and rolled up again when the liquid phase flows in the sand deposition chamber 11; in addition, the sand in the sand storage chamber 15 is discharged first when the sand is discharged, and the specific design of the sand storage chamber 15 has less impact on the liquid phase flow during sand discharge, reduces the impact on the work of the three-phase separator during sand discharge, and allows the sand discharge work and the separation work of the three-phase separator to be carried out simultaneously for a short time, that is, there is no need to shut down the three-phase separator when the sand is discharged quickly.

[0037] It should be noted that the sand storage chamber 15 of the spherical head has a stronger pressure bearing capacity and a larger sand storage capacity than other shapes.

[0038] In a feasible implementation manner, the sand discharge port 16 is provided with a sand discharge valve, which controls the opening and closing of the sand discharge port 16. When discharging sand, the sand discharge valve is opened, and the sand in the sand storage chamber 15 can be discharged from the cylinder 1 through the sand discharge port 16 and the sand discharge valve.

[0039] Example 3

[0040] On the basis of any one of the implementation methods described in Examples 1-2, a specific implementation method that can be implemented is further proposed.

[0041] A feasible implementation manner is that a distributor 12 is provided at the material inlet 17. The distributor 12 is actually a blade uniform distributor. The specific structure of the distributor 12 is known to those skilled in the art and will not be described in detail in this specification. The distributor 12 is usually used in a packed tower, and its function in the packed tower is to evenly distribute the liquid in the cross section of the tower. In the present utility model, the distributor 12 is connected to the material inlet 17 and is located downstream of the material inlet 17. After the fluid passes through the material inlet 17, it passes through the distributor 12. While the fluid is evenly distributed, the flow rate of the fluid is reduced. On the one hand, it effectively avoids the excessive flow rate of the fluid, which causes the liquid phase to be impacted into smaller droplets, thereby promoting subsequent oil-water separation. On the other hand, the distributor 12 reduces the flow rate of the fluid, and can also reduce the kinetic energy impact of the fluid when it enters the sand deposition chamber 11 and mixes with the liquid phase in the sand deposition chamber 11, thereby reducing the energy and height of the waves in the sand deposition chamber 11, reducing the fluctuation of the liquid phase in the sand deposition chamber 11, and facilitating the deposition of sand. Furthermore, the reduction in flow rate increases the residence time of the fluid in the sand deposition chamber 11, so that the sand has enough time to complete the deposition.

[0042] A feasible implementation manner is that the outlet of the distributor 12 is close to the inner wall of the cylinder 1 and is not perpendicular to the surface of the inner wall of the cylinder 1, so as to prevent the fluid from vertically impacting the inner wall of the cylinder 1. On the one hand, it is effective to prevent the liquid phase from being impacted into smaller droplets due to excessive fluid flow rate, thereby promoting subsequent oil-water separation; preferably, the outlet of the distributor 12 is tangential to the inner wall of the cylinder 1, so that the fluid can flow downstream along the inner wall of the cylinder 1, reducing the impact on the liquid phase in the sand deposition chamber 11, and consuming the kinetic energy of the fluid through friction.

[0043] In a feasible implementation manner, the distributor 12 is oriented as far as possible toward a side away from other spaces of the cylinder 1, thereby increasing the flow path of the fluid in the sand deposition chamber 11, thereby increasing the time the fluid stays in the sand deposition chamber 11, so that the carried sand particles are deposited in the sand deposition chamber 11 as completely as possible.

[0044] A feasible implementation manner is that a wave-proof baffle 2 is arranged between the sand deposition chamber 11 and other spaces inside the cylinder 1, and the wave-proof baffle 2 is preferably connected to the cylinder 1 in a detachable manner to facilitate maintenance and inspection; the main purpose of the wave-proof baffle 2 is to block the spray generated when the fluid enters the sand deposition chamber 11, and reduce the influence of waves on the stratification of the liquid phase and the liquid level in other spaces; in addition, the wave-proof baffle 2 can actually be a baffle for the liquid phase to pass through, and specifically, a number of fine holes are arranged on the baffle, which can allow the liquid phase to pass through and block sand particles; there is a sand blocking portion 21 on the wave-proof baffle 2, and the side of the sand blocking portion 21 is in contact with the bottom of the cylinder 1, and the sand blocking portion 21 blocks the sand particles deposited at the bottom of the sand deposition chamber 11 from entering other spaces.

[0045] It should be noted that the sand retaining portion 21 is a complete plate, and the liquid phase cannot enter other spaces of the cylinder 1 through the sand retaining portion 21, that is, there must be some liquid phase in the sand deposition chamber 11, and the liquid phase can effectively improve the fluidity of the sand and promote the discharge of sand particles through the sand discharge port 16.

[0046] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A three-phase separator with better sand removal effect, characterized in that: The invention comprises a cylinder (1) having a sand deposition chamber (11), wherein a material inlet (17) is provided at the top of the sand deposition chamber (11), a sand flushing pipe (13) is provided in the sand deposition chamber (11), the pipe inlet of the sand flushing pipe (13) is located outside the cylinder (1), and a plurality of sand flushing nozzles (14) are provided in the part of the sand flushing pipe (13) located in the cylinder (1); a sand storage chamber (15) is provided at the bottom of the sand deposition chamber (11), the sand storage space of the sand storage chamber (15) is lower than the bottom of the sand deposition chamber (11), and a sand discharge port (16) is provided at the bottom of the sand storage chamber (15).

2. The three-phase separator according to claim 1, characterized in that: The sand flushing nozzle (14) is installed in a posture facing the sand deposition chamber (11).

3. The three-phase separator according to claim 1, characterized in that: The sand flushing pipe (13) surrounds the inner wall of the sand deposition chamber (11) in the same horizontal cross section.

4. The three-phase separator according to claim 1, characterized in that: A plurality of sand flushing nozzles (14) are evenly arranged along the axis of the sand flushing pipe (13).

5. The three-phase separator according to claim 1, characterized in that: The sand flushing nozzle (14) is tangentially attached to the inner wall of the cylinder (1).

6. The three-phase separator according to claim 1, characterized in that: The structure of the sand storage chamber (15) comprises a straight cylinder and a spherical sealing head, wherein the spherical sealing head seals one end of the straight cylinder, and the other end of the straight cylinder is fixedly connected to the cylinder body (1) as a sand inlet, and the diameter of the sand inlet is smaller than the bottom size of the sand deposition chamber (11).

7. The three-phase separator according to claim 1, characterized in that: The sand discharge port (16) is provided with a sand discharge valve.

8. The three-phase separator according to any one of claims 1 to 7, characterized in that: A distributor (12) is provided at the material inlet (17), and the distributor (12) is communicated with the material inlet (17) and is located downstream of the material inlet (17).

9. The three-phase separator according to claim 8, characterized in that: The outlet of the distributor (12) is attached to the inner wall of the cylinder (1) and is not perpendicular to the surface where the inner wall of the cylinder (1) is located.

10. The three-phase separator according to any one of claims 1 to 7, characterized in that: A wave-proof baffle (2) is arranged between the sand deposition chamber (11) and other spaces inside the cylinder (1), and a sand-blocking portion (21) is provided on the wave-proof baffle (2), and the side surface of the sand-blocking portion (21) is in contact with the bottom of the cylinder (1).

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