Blending device

Abstract

The utility model discloses a mixing device and relates to the technical field of oilfield ternary injection. A water passing weir with a horizontal edge is arranged on the upper portion of a tank body of the mixing tank, an installation flange is arranged on the lower portion of the mixing tank, a circle of L-shaped water inlet cofferdam is welded on the outer side of the water passing weir of the mixing tank, the water inlet cofferdam is higher than the water passing weir, a water inlet pipe is arranged on one side of the water inlet cofferdam, and a scattering mechanism is installed in the mixing tank and located in the center of the mixing tank. And the scattering mechanism is fixed on the inner wall of the mixing tank through a supporting piece. The polymer particle mixing device has the beneficial effects that the water curtain which continuously flows downwards is arranged in the mixing tank, the jet device which rotates at a high speed sprays out polymer particles, and due to the fact that the jet device rotates at a high speed, the sprayed polymer particles are in a scattering state and are mixed with the water curtain, the possibility that the polymer particles meet with one another is greatly reduced, and the mixing quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of ternary injection technology in oil fields, and in particular to a mixing device. Background Technology

[0002] Chemical flooding has become one of the important means of stabilizing production in the tertiary recovery stage of oilfields. The polymer dispersion unit is a device that prepares the polymer particles used for oil displacement into a standard solution. When preparing the polymer mother liquor, the polymer particles are usually put into water. When the polymer particles come into contact with water, they will expand in volume. Some polymer particles that are not dispersed will stick together to form sticky clumps, commonly known as fish eyes, as they expand in the process of water exposure. These viscous clumps do not mature in water and will flow around with the water flow in the mixing tank, causing blockage of the outlet pipe and adhering to the inside of the mixing tank and the mixing blade. Utility Model Content

[0003] To address the problem of uneven polymer dispersion, this invention provides a mixing device.

[0004] The technical solution provided by this utility model is: a mixing device, including a mixing tank, the upper part of the mixing tank has a horizontal edge water weir, the lower part of the mixing tank has an installation flange, an L-shaped water inlet weir is welded around the outside of the water weir, the height of the water inlet weir is higher than the water weir, a water inlet pipe is provided on one side of the water inlet weir, a scattering mechanism is installed inside the mixing tank, the scattering mechanism is located in the center of the mixing tank, and the scattering mechanism is fixed to the inner wall of the mixing tank by a support member;

[0005] The scattering mechanism includes an ejector, with the nozzle and discharge pipe of the ejector arranged horizontally. The suction pipe of the ejector extends upward and is rotatably connected to a hopper. The hopper is fixed to the inlet weir by a support arm. The lower part of the ejector is fixedly connected to a support shaft. The support shaft is connected to the support sleeve by a bearing assembly, a spacer, and a shaft retaining ring. The support shaft and the support sleeve are rotatably connected and axially limited. Gear A is welded on the support shaft. Gear A meshes with gear B. Gear B is connected to the output shaft of the motor by a flat key. The motor and the support sleeve are fixedly connected to the support component.

[0006] The nozzle of the jet injector is connected to the air passage, which extends to the center of the lower end of the support shaft. The lower end of the support shaft is connected to the air connector via a mechanical seal at the air passage location. The lower part of the air connector has a threaded interface, through which compressed air is connected. The air connector is fixedly connected to the support sleeve via the support arm.

[0007] The hopper is rotatably connected to the suction pipe via a bearing. A baffle pipe extends from the lower part of the hopper into the inner hole of the suction pipe. The outer diameter of the baffle pipe is smaller than the inner hole of the suction pipe.

[0008] The beneficial effects of this utility model are as follows: by setting a continuously downward flowing water curtain in the mixing tank, and spraying polymer particles out by a high-speed rotating jet nozzle, the polymer particles sprayed out are in a scattered state and mixed with the water curtain due to the high-speed rotation of the jet nozzle, which greatly reduces the possibility of polymer particles meeting each other and improves the mixing quality. Attached Figure Description

[0009] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Appendix Figure 2 This is a schematic diagram of the scattering mechanism in this utility model;

[0011] Appendix Figure 3 It is attached Figure 2 Enlarged view of point A;

[0012] Appendix Figure 4 It is attached Figure 2 Enlarged view of point B.

[0013] In the diagram, 1-mixing tank, 2-inlet weir, 3-inlet pipe, 4-scattering mechanism, 5-support component, 6-support arm, 7-water weir, 8-ejector, 9-hopper, 10-suction pipe, 11-nozzle, 12-ejection pipe, 13-support shaft, 14-support sleeve, 15-gear A, 16-gear B, 17-motor, 18-spacer, 19-mechanical seal, 20-air connector, 21-support arm, 22-baffle pipe, 23-air passage, 24-threaded interface. Detailed Implementation

[0014] like Figures 1-4 As shown, a mixing device includes a mixing tank 1. The upper part of the mixing tank 1 has a horizontal water weir 7, and the lower part of the mixing tank 1 has a mounting flange. An L-shaped water inlet weir 2 is welded around the outside of the water weir 7. The height of the water inlet weir 2 is higher than that of the water weir 7. A water inlet pipe 3 is provided on one side of the water inlet weir 2. A scattering mechanism 4 is installed inside the mixing tank 1. The scattering mechanism 4 is located at the center of the mixing tank 1 and is fixed to the inner wall of the mixing tank 1 by a support member 5.

[0015] The scattering mechanism 4 includes an ejector 8, with nozzle 11 and ejection pipe 12 arranged horizontally. The suction pipe 10 of the ejector 8 extends upward and is rotatably connected to a hopper 9. The hopper 9 is fixed to the inlet weir 2 by a support arm 6. The lower part of the ejector 8 is fixedly connected to a support shaft 13. The support shaft 13 is connected to a support sleeve 14 through a bearing assembly, a spacer 18, and a shaft retaining ring. The support shaft 13 and the support sleeve 14 are rotatably connected. The support shaft 13 and the support sleeve 14 are axially limited. A gear A15 is welded on the support shaft 13. The gear A15 meshes with a gear B16. The gear B16 is connected to the output shaft of the motor 17 by a flat key. The motor 17 and the support sleeve 14 are fixedly connected to a support member 5.

[0016] The nozzle 11 of the jet injector 8 is connected to the air passage 23, which extends to the center of the lower end of the support shaft 13. The lower end of the support shaft 13 is connected to the air connector 20 through the mechanical seal 19 at the position of the air passage 23. The air connector 20 and the rotating support shaft 13 are rotated and sealed by the mechanical seal 19. The lower part of the air connector 20 is machined with a threaded interface 24, which is connected to compressed air through the threaded interface 24. The air connector 20 is fixedly connected to the support sleeve 14 through the support arm 21.

[0017] The mixing tank 1 is installed above the polymer mother liquor preparation tank. When in use, polymer particles are filled into the hopper 9 and the suction pipe 10, and clean water is introduced into the water inlet pipe 3. The clean water overflows from the water overflow weir 7 at the water inlet weir 2 and flows down the inner wall of the mixing tank 1, forming a water curtain on the inner wall of the mixing tank 1. The motor 17 is turned on, and the gear B16 drives the gear A15, the support column 13 and the ejector 8 to rotate at high speed together, and compressed air is introduced into the air connector 20. The compressed air enters the nozzle 11 through the air channel 23. The compressed air flows out of the nozzle 11 to form a negative pressure, which sucks in the polymer particles in the suction pipe 10 and sprays them out from the spray pipe 12. When the high-speed rotating and sprayed polymer particles encounter the flowing water curtain, they mix with the water.

[0018] A continuously flowing water curtain is set in the mixing tank 1, and a high-speed rotating jet nozzle 8 sprays out polymer particles. Due to the high-speed rotation of the jet nozzle 8, the sprayed polymer particles are scattered and mixed with the water curtain, which greatly reduces the possibility of polymer particles meeting each other and improves the mixing quality.

[0019] The hopper 9 is rotatably connected to the suction pipe 10 via a bearing. A baffle pipe 22 extends from the lower part of the hopper 9 into the inner hole of the suction pipe 10. The outer diameter of the baffle pipe 22 is smaller than the inner hole of the suction pipe 10. The baffle pipe 22 can prevent polymer particles from getting stuck at the connection between the suction pipe 10 and the hopper 9.

Claims

1. A compounding device comprising a compounding tank (1), characterized in that: The water weir (7) with horizontal edge is arranged on the upper part of the tank body of the mixing tank (1), the mixing tank (1) is provided with a mounting flange at the lower part, a L-shaped water inlet cofferdam (2) is welded outside the water weir (7) of the mixing tank (1), the height of the water inlet cofferdam (2) is higher than that of the water weir (7), a water inlet pipe (3) is arranged on one side of the water inlet cofferdam (2), and a scattering mechanism (4) is arranged in the mixing tank (1) and located at the central part of the mixing tank (1), and the scattering mechanism (4) is fixed to the inner wall of the mixing tank (1) through a support (5); The scattering mechanism (4) comprises a fluidic device (8), the nozzle (11) and the ejection pipe (12) of the fluidic device (8) are arranged horizontally, the suction pipe (10) of the fluidic device (8) extends upward and is rotatably connected to a hopper (9), the hopper (9) is fixed to the water inlet cofferdam (2) through a support arm (6), the lower part of the fluidic device (8) is fixedly connected to a support shaft (13), the support shaft (13) is connected to a support sleeve (14) through a bearing set, a spacer (18) and a shaft retaining ring, the support shaft (13) and the support sleeve (14) are rotatably connected, the support shaft (13) and the support sleeve (14) are axially limited, a gear A (15) is welded on the support shaft (13), the gear A (15) is meshingly connected to a gear B (16), the gear B (16) is connected to the output shaft of a motor (17) through a flat key, and the motor (17) and the support sleeve (14) are fixedly connected to the support (5); The nozzle (11) of the fluidic device (8) is connected to an air channel (23), the air channel (23) extends to the central position of the lower end of the support shaft (13), the lower end of the support shaft (13) is connected to an air connector (20) through a mechanical seal (19) at the position of the air channel (23), a threaded interface (24) is formed on the lower part of the air connector (20), the air connector (20) is connected to compressed air through the threaded interface (24), and the air connector (20) is fixedly connected to the support sleeve (14) through a support arm (21).

2. A compounding device according to claim 1, characterized in that: The hopper (9) is rotatably connected to the suction pipe (10) through a bearing, the hopper (9) extends a blocking pipe (22) into the inner hole of the suction pipe (10) at the lower part, and the outer circle of the blocking pipe (22) is smaller than the inner hole of the suction pipe (10).

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