Stirring device for sludge concentration in oilfield produced water treatment

Abstract

The utility model relates to the technical field of oilfield produced water treatment, in particular to a stirring device for oilfield produced water treatment and sludge concentration, which comprises a conductor wheel, a permanent magnet wheel, a stirring shaft and a flat-bottom frame type impeller, the top of the conductor wheel is fixedly connected with a motor shaft of the three-phase asynchronous motor; one side of the sliding block is fixedly connected with the side face of the three-phase asynchronous motor, and the other side is connected with the electric sliding rail through a spiral rack; the permanent magnet wheel is positioned inside the conductor wheel; the top of the stirring shaft is welded with the bottom of the permanent magnet wheel; the stirring shaft is mounted on the mounting base through a mechanical rotary sealing device and can rotate relative to the mounting base; the flat-bottom frame type impeller is arranged on the stirring shaft, and a plurality of medicament spray heads are arranged on the flat-bottom frame type impeller. According to the utility model, the non-rigid coupling is adopted, the structure is simple, the overload of the motor can be avoided, the rotating speed can be adjusted by adjusting the meshing area between the conductor wheel and the permanent magnet wheel, the energy efficiency is improved, and the problems that the existing sludge stirrer is easy to damage and low in energy efficiency are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield produced water treatment, and particularly relates to a stirring device for sludge concentration in oilfield produced water treatment. Background Art

[0002] The oilfield produced water treatment system mainly treats the oily produced water separated by the crude oil treatment station. During the operation of the produced water treatment system, the oil removal facilities and coagulation sedimentation facilities need to discharge sludge regularly to maintain continuous operation. The sludge discharged from the facilities is mainly high-moisture-content sludge, and the moisture content is generally about 99%. In order to meet the requirements of the downstream filter press for the moisture content of the incoming sludge and improve the filtering effect of the filter press, it is necessary to concentrate the high-moisture-content sludge.

[0003] In actual production, generally, a sludge concentration agent is added to the high-moisture sludge buffer tank, and a sludge stirrer is arranged at the top for sludge concentration treatment. The sludge stirrer generally adopts a stirring shaft with a rigid coupling. During operation, the vibration is large, and it is easy for the torque of the stirring shaft to be too large, resulting in overload, damage of the motor of the sludge stirrer or damage of the coupling. In addition, the sludge stirrer generally uses a frequency conversion controller to adjust the stirring speed, and the energy efficiency is low. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the defects existing in the prior art and propose to design a stirring device for sludge concentration in oilfield produced water treatment to solve the problems of easy damage and low energy efficiency existing in the existing sludge stirrers.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A stirring device for sludge concentration in oilfield produced water treatment, comprising:

[0007] A conductor wheel, the top of which is fixedly connected to the motor shaft of a three-phase asynchronous motor;

[0008] A slider, one side of which is fixedly connected to the side of the three-phase asynchronous motor, and the other side of which is connected to a vertically arranged electric slide rail by a spiral rack, and the electric slide rail can drive the slider to move up and down;

[0009] A permanent magnet wheel, located inside the conductor wheel, having no rigid coupling, with a simple structure, capable of avoiding motor overload, and capable of adjusting the rotation speed by adjusting the meshing area between the conductor wheel and the permanent magnet wheel to improve energy efficiency;

[0010] A stirring shaft, the top of which is welded to the bottom of the permanent magnet wheel. A mechanical rotary seal device is connected to the stirring shaft by mechanical rotary seal. The mechanical rotary seal device is fixed on the mounting base, and the stirring shaft is installed on the mounting base through the mechanical rotary seal device and can rotate relative to the mounting base;

[0011] The flat-bottomed frame impeller is arranged on the stirring shaft, and several chemical agent spray nozzles are arranged on the flat-bottomed frame impeller.

[0012] Furthermore, both the stirring shaft and the flat-bottomed frame impeller are of a hollow type and are interconnected for adding chemical agents, enabling the simultaneous progress of the chemical agent dosing and stirring processes, and improving the sludge thickening efficiency.

[0013] Furthermore, a chemical agent main pipe is arranged inside the stirring shaft, a chemical agent branch pipe communicating with the chemical agent main pipe is arranged inside the flat-bottomed frame impeller, and the chemical agent branch pipe is communicated with the chemical agent spray nozzles.

[0014] Furthermore, one side of the chemical agent main pipe is communicated with the chemical agent dosing pipeline.

[0015] Furthermore, the conductor wheel is welded to the motor shaft of the three-phase asynchronous motor.

[0016] Furthermore, the three-phase asynchronous motor is welded to the slider.

[0017] Furthermore, the electric slide rail is fastened to the installation base by bolts.

[0018] Furthermore, the flat-bottomed frame impeller and the stirring shaft are connected by welding.

[0019] Furthermore, the stirring device for sludge thickening in oilfield produced water treatment further includes a control console for automatically controlling the stirring device.

[0020] The technical effects of the present utility model:

[0021] Compared with the prior art, the present utility model uses a vertically movable conductor wheel and a fixed rotatable permanent magnet wheel to replace the traditional rigid coupling and frequency conversion controller. By moving and adjusting the meshing area between the conductor wheel and the permanent magnet wheel, the rotational speed is adjusted. The larger the meshing area, the higher the load rotational speed, and the smaller the meshing area, the lower the load rotational speed. It can achieve true no-load starting, and at the same time, without a rigid coupling, the structure is simple, making equipment maintenance, disassembly and assembly simpler and more convenient, and there will be no motor overload situation. In addition, both the stirring shaft and the flat-bottomed frame impeller of the present utility model are of a hollow structure, and chemical agent spray nozzles are evenly arranged inside and outside the flat-bottomed frame impeller, enabling the direct dosing of sludge thickening chemical agents through the stirring device, making the chemical agent dosing and stirring processes proceed simultaneously. The sludge thickening chemical agents are mixed with the high-water-content sludge more evenly and rapidly, greatly improving the sludge thickening efficiency, reducing the sludge thickening time, and can greatly reduce the volume of the sludge buffer tank and lower the project cost. Description of the Drawings

[0022] Figure 1 It is a schematic structural principle diagram of the stirring device for sludge thickening in oilfield produced water treatment of the present utility model.

[0023] In the figure, 1 is a conductor wheel; 2 is a permanent magnet wheel; 3 is a three-phase asynchronous motor; 4 is a slider; 5 is an electric slide rail; 6 is a mechanical rotary seal device; 7 is a mounting base; 8 is a stirring shaft; 9 is a chemical feeding main pipe; 10 is a flat-bottom frame-type impeller; 11 is a chemical feeding branch pipe; 12 is a chemical agent spray head; 13 is a chemical agent feeding pipeline. Specific embodiments

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the specification.

[0025] Embodiment 1:

[0026] As Figure 1 shown, a stirring device for sludge thickening in oilfield produced water treatment involved in this embodiment includes a conductor wheel 1, a permanent magnet wheel 2, a three-phase asynchronous motor 3, a slider 4, an electric slide rail 5, a mechanical rotary seal device 6, a mounting base 7, a stirring shaft 8, a flat-bottom frame-type impeller 10, a chemical agent spray head 12, and a control console for automatically controlling the stirring device.

[0027] The conductor wheel 1 is welded to the motor shaft of the three-phase asynchronous motor 3 located above it. The three-phase asynchronous motor 3 is welded to the slider 4 located on one side of it. The slider 4 and the electric slide rail 5 are connected by a spiral rack.

[0028] The permanent magnet wheel 2 is located below the conductor wheel 1, and the bottom of the permanent magnet wheel 2 is welded to the top of the hollow stirring shaft 8; the mechanical rotary seal device 6 is connected to the stirring shaft 8 by a mechanical rotary seal; the mechanical rotary seal device 6 and the mounting base 7 are fastened together by bolts. The electric slide rail 5 is vertically arranged and is fastened to the mounting base 7 by bolts at the bottom. The stirring shaft 8 is welded to the hollow flat-bottom frame-type impeller 10 and is in communication with the hollow flat-bottom frame-type impeller 10. The chemical agent spray heads 12 are evenly arranged on the inner and outer braces of the flat-bottom frame-type impeller 10, and the chemical agent spray heads 12 are threadedly connected to the flat-bottom frame-type impeller 10. A chemical feeding main pipe 9 is arranged inside the stirring shaft 8, a chemical feeding branch pipe 11 communicating with the chemical feeding main pipe 9 is arranged inside the flat-bottom frame-type impeller 10, and the chemical feeding branch pipe 11 is in communication with the chemical agent spray heads 12. One side of the stirring shaft 8 is in communication with the chemical agent feeding pipeline 13.

[0029] Working principle:

[0030] When this embodiment operates normally, the three-phase asynchronous motor 3, the slider 4, and the electric slide rail 5 are in a fixed state; the three-phase asynchronous motor 3 drives the conductor wheel 1 to rotate; the rotating conductor wheel 1 drives the permanent magnet wheel 2 and the stirring shaft 8 and the flat-bottomed frame impeller 10 connected thereto to perform a rotating stirring motion under the action of magnetic force; during the stirring process, the sludge thickening agent is conveyed to the stirring shaft 8 through the chemical dosing pipeline 13, and then the sludge thickening agent is evenly distributed in the flat-bottomed frame impeller 10 through the chemical dosing main pipe 9 and the chemical dosing branch pipe 11, and finally is added into the high-water-content sludge through the chemical dosing nozzle 12; the chemical dosing and the stirring process are carried out simultaneously, so that the sludge thickening agent and the high-water-content sludge are mixed more evenly and quickly, greatly improving the sludge thickening efficiency and reducing the sludge thickening time; in addition, the conductor wheel 1 and the permanent magnet wheel 2 are in non-contact connection, avoiding the situation that the three-phase asynchronous motor 3 is overloaded and damaged due to excessive torque of the stirring shaft 8.

[0031] When the rotation speed of this embodiment is adjusted, the electric slide rail 5 is adjusted to drive the slider 4, the three-phase asynchronous motor 3, and the conductor wheel 1 to move vertically, and the meshing area between the conductor wheel 1 and the permanent magnet wheel 2 is adjusted to achieve the purpose of automatic speed regulation.

[0032] The above specific implementation manners are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the above specific implementation manners. Any appropriate changes or modifications made by any person skilled in the art who meets the claims of the present invention shall fall within the patent protection scope of the present invention.

Claims

1. A stirring device for concentrating sludge from oilfield produced water treatment, characterized in that: include: A conductor wheel (1), the top of which is fixedly connected to the motor shaft of a three-phase asynchronous motor (3); A slider (4) having one side fixedly connected to the side of the three-phase asynchronous motor (3) and the other side connected to a vertically arranged electric slide rail (5) by means of a spiral rack, wherein the electric slide rail (5) can drive the slider (4) to move up and down; A permanent magnet wheel (2) located inside the conductor wheel (1); The top of the stirring shaft (8) is welded to the bottom of the permanent magnet wheel (2); the stirring shaft (8) is connected to a mechanical rotating sealing device (6) by a mechanical rotating sealing device; the mechanical rotating sealing device (6) is fixed to the mounting base (7); the stirring shaft (8) is mounted on the mounting base (7) through the mechanical rotating sealing device (6) and is rotatable relative to the mounting base (7); The flat-bottom frame-type impeller (10) is arranged on the stirring shaft (8), and a plurality of medicine spray heads (12) are arranged on the flat-bottom frame-type impeller (10).

2. The stirring device for concentrating sludge from oilfield produced water treatment according to claim 1, characterized in that: The stirring shaft (8) and the flat-bottom frame impeller (10) are both hollow and interconnected.

3. The stirring device for concentrating sludge from oilfield produced water treatment according to claim 2, characterized in that: A dosing main pipe (9) is arranged inside the stirring shaft (8), and a dosing branch pipe (11) connected to the dosing main pipe (9) is arranged inside the flat-bottom frame impeller (10), and the dosing branch pipe (11) is connected to the medicine spray head (12).

4. The stirring device for concentrating sludge from oilfield produced water treatment according to claim 3, characterized in that: One side of the drug adding main pipe (9) is connected to the drug adding pipeline (13).

5. The stirring device for concentrating sludge from oilfield produced water treatment according to claim 1, characterized in that: The conductor wheel (1) is welded to the motor shaft of the three-phase asynchronous motor (3).

6. The stirring device for concentrating sludge from oilfield produced water treatment according to claim 1, characterized in that: The three-phase asynchronous motor (3) is welded to the slider (4).

7. The stirring device for concentrating sludge from oilfield produced water treatment according to claim 1, characterized in that: The electric slide rail (5) is fastened to the mounting base (7) by means of bolts.

8. The stirring device for concentrating sludge from oilfield produced water treatment according to claim 1, characterized in that: The flat-bottom frame-type impeller (10) and the stirring shaft (8) are connected by welding.

9. The stirring device for concentrating sludge from oilfield produced water treatment according to any one of claims 1 to 8, characterized in that: The stirring device for concentrating oilfield produced water treatment sludge also includes a control console for automatically controlling the stirring device.

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