Intelligent agent adding and rapid mixing device for oil field water treatment

Abstract

The utility model discloses an oil field water treatment intelligent agent adding rapid mixing device which comprises a straight pipe, a water inlet pipe and a water outlet pipe are arranged at the two ends of the straight pipe respectively, and a metering type agent adding assembly and an inclined frequency conversion stirring assembly are installed at the top of the pipe wall of the straight pipe. The inclined variable-frequency stirring assembly is positioned between the metering type dosing assembly and the water outlet pipe; a turbulent flow partition plate is arranged on the inner wall of the straight pipe. According to the utility model, pipeline spoiler mixed flow and mechanical high-speed stirring and mixing are adopted, so that the added medicament can be fully mixed within the shortest time, and good conditions are created for next flocculation and purification, thereby improving the water quality. The device is simple in structure, easy to maintain and repair and suitable for being popularized and used in oil fields.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield water treatment, in particular to an intelligent agent dosing and rapid mixing device for oilfield water treatment. Background Art

[0002] Oilfield water treatment refers to the technology of treating water for complex impurities before and after water is injected into oil and gas fields. These impurities include solid impurities, liquid impurities, dissolved gases and dissolved salts. The purpose of oilfield wastewater treatment is mainly to remove harmful substances in wastewater or reduce them to a standard level so that wastewater can be used. In the process of treatment, an intelligent agent dosing and rapid mixing device for oilfield water treatment is provided.

[0003] In the production process of oilfield produced water treatment and daily water purification plant sewage treatment plant, multiple chemicals need to be added in the water treatment process to achieve the purpose of water purification. The main process is coagulant addition-mixing-flocculation-precipitation purification. Among them, the mixing process is very important. If the mixing process is not good, it will lead to waste of chemicals and poor flocculation effect, thus affecting water quality safety. However, the existing mixing efficiency is low, and it is easy to cause uneven mixing of chemicals and water, which affects the treatment of oilfield water.

[0004] Publication (Announcement) No.: CN219942571U discloses an oilfield wastewater treatment device, which is provided with a driving mechanism, a shaft and a stirring rod, and the driving mechanism drives the stirring barrel, the shaft and the stirring rod to rotate simultaneously to mix the wastewater with the wastewater treatment agent.

[0005] The existing technology can enhance the mixing effect by rotating the mixing barrel, shaft and mixing rod at the same time, but the mixing barrel is large in size, and a large amount of energy is consumed to drive the mixing barrel to rotate. In addition, the mixing barrel has low efficiency in driving the internal liquid, and the existing technology consumes too much energy.

[0006] Publication (Announcement) No.: CN219449334U, discloses an oilfield produced water treatment equipment, wherein a stirring mechanism is provided with a plurality of stirring rods, a driving device is provided with a plurality of gears, the plurality of gears rotate following the scraper plates connected thereto, the plurality of gears can rotate on their own under the meshing of the gear rings, the plurality of gears respectively drive a plurality of transmission shafts to rotate, and the transmission shafts drive the stirring rods to rotate, thereby further improving the mixing efficiency of produced water and reagents.

[0007] The prior art is provided with a plurality of stirring rods, which makes the size of the whole device larger, and the plurality of stirring rods and the accessory parts driving them are numerous, which are not easy to maintain and overhaul.

[0008] Publication (announcement) number: CN115403193A, discloses a high-efficiency oilfield wastewater treatment device, which quickly realizes wastewater coagulation and sedimentation treatment through a plurality of staggered upper baffles and lower baffles.

[0009] This prior art only sets up partition plates and there is no energy supply in the device, resulting in low mixing efficiency.

[0010] In summary, the technical solutions, the technical problems to be solved and the beneficial effects of the above-disclosed technologies are all different from those of the present utility model. For more technical features, technical problems to be solved and beneficial effects of the present utility model, there is no technical inspiration in the above-disclosed technical documents. Content of the Utility Model

[0011] In view of the above-mentioned defects existing in the prior art, the purpose of the present utility model is to provide an intelligent chemical dosing and rapid mixing device for oilfield water treatment, which adopts pipe turbulence baffles for mixing and mechanical high-speed stirring for mixing, realizes full mixing of chemicals in a short time, and has a simple structure and is easy to maintain and overhaul.

[0012] In order to achieve the above purpose, the present utility model adopts the following technical solutions:

[0013] An intelligent chemical dosing and rapid mixing device for oilfield water treatment includes a straight pipe. Water inlet pipes and outlet pipes are respectively arranged at both ends of the straight pipe. A metering chemical dosing component and an inclined variable-frequency stirring component are installed on the top of the pipe wall of the straight pipe. The inclined variable-frequency stirring component is located between the metering chemical dosing component and the outlet pipe. Turbulence baffles are arranged on the inner wall of the straight pipe.

[0014] Further, the metering chemical dosing component includes a chemical liquid inlet pipe, on which a chemical dosing flowmeter is installed. The chemical liquid inlet pipe is arranged on the top of the straight pipe and inserted into the straight pipe.

[0015] Further, the inclined variable-frequency stirring component includes an inclined pipe, a rod body, a variable-frequency motor and a controller;

[0016] Specifically, the inclined pipe is connected to the top of the straight pipe. The rod body penetrates through the inclined pipe and is rotatably arranged inside the inclined pipe. The end of the rod body penetrating into the straight pipe is fixedly connected with a stirring rod. The end of the rod body protruding from the upper end of the inclined pipe is connected to the variable-frequency motor. The variable-frequency motor is electrically connected to the controller.

[0017] Further, the turbulence baffles include a first baffle, a second baffle and a third baffle. The first baffle and the third baffle are arranged at the bottom of the inner wall of the straight pipe, and the second baffle is arranged at the top of the inner wall of the straight pipe;

[0018] Specifically, the first baffle is located between the chemical liquid inlet pipe and the inclined pipe;

[0019] Specifically, the second baffle is located between the first baffle and the inclined pipe;

[0020] Specifically, the third baffle is located between the stirring rod and the outlet pipe.

[0021] Further, the end position of the liquid medicine inlet pipe inside the straight pipe is lower than the first partition board, the position of the stirring rod is lower than the second partition board, and the water inlet pipe and the water outlet pipe are tangent to the bottom inner wall of the straight pipe.

[0022] Further, a liquid inlet flowmeter is installed on the water inlet pipe;

[0023] Specifically, the controller is electrically connected to the chemical dosing flowmeter and the liquid inlet flowmeter respectively. The controller is a programmable variable-frequency motor driver, and the controller adjusts the rotation speed of the variable-frequency motor according to the data of the chemical dosing flowmeter and the liquid inlet flowmeter and its own preset program.

[0024] Further, the back surface of the variable-frequency motor is fixedly connected to the back surface of the inclined pipe through a bracket.

[0025] Further, a block is fixedly connected to the inner side of the inclined pipe. The inner side of the block is rotationally connected to the outer side of the rod body through a sealed bearing. The block is in interference fit with the sealed bearing, and the rod body is in clearance fit with the upper end of the inclined pipe, leaving a rotating space.

[0026] Further, the sealed bearing is a deep groove ball bearing with a sealing ring.

[0027] Further, the first partition board, the second partition board, and the third partition board are all semi-circular.

[0028] The utility model has the following beneficial effects compared with the prior art:

[0029] The utility model adopts pipeline spoiler mixing + mechanical high-speed stirring mixing, which can make the added medicine fully mixed in the shortest time, create good conditions for the next flocculation and purification, and thus improve the water quality.

[0030] The structure of the utility model is simple and easy to maintain and overhaul, and it is suitable for popularization and use in oil fields. Description of the Drawings

[0031] Figure 1 is the external structure schematic diagram of an intelligent chemical dosing and rapid mixing device for oil field water treatment of the utility model;

[0032] Figure 2 is the internal structure schematic diagram of an intelligent chemical dosing and rapid mixing device for oil field water treatment of the utility model;

[0033] Figure 3 is the cross-sectional view of the first partition board in the utility model;

[0034] Figure 4 is the cross-sectional view of the third partition board in the utility model.

[0035] In the figure: 1. Straight pipe, 2. Third partition board, 3. First partition board, 4. Cover body, 5. Liquid medicine inlet pipe, 6. Water inlet pipe, 7. Water outlet pipe, 8. Second partition board, 9. Rod body, 10. Block, 11. Sealed bearing, 12. Inclined pipe, 13. Variable-frequency motor, 14. Chemical dosing flowmeter, 15. Bracket, 16. Stirring rod, 17. Liquid inlet flowmeter, 18. Controller. Specific implementation mode

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1:

[0038] Please refer to Figures 1 to 4 , an intelligent chemical dosing and rapid mixing device for oilfield water treatment provided by the present invention, includes a straight pipe 1. The two ends of the straight pipe 1 are respectively provided with a water inlet pipe 6 and a water outlet pipe 7. A metering chemical dosing assembly is installed on the top of the pipe wall of the straight pipe 1. An inclined variable-frequency stirring assembly is installed on the top of the pipe wall of the straight pipe 1. The inclined variable-frequency stirring assembly is located between the metering chemical dosing assembly and the water outlet pipe 7. A flow disturbance partition board is arranged on the inner wall of the straight pipe 1 to play a role in mixing the produced liquid and the liquid medicine when they pass through.

[0039] Among them, the water inlet pipe 6 and the water outlet pipe 7 are used as the inlet and outlet of the solution, and a liquid inlet flowmeter 17 is installed on the water inlet pipe 6.

[0040] Further, the metering chemical dosing assembly includes a liquid medicine inlet pipe 5. A chemical dosing flowmeter 14 is installed on the liquid medicine inlet pipe 5. The liquid medicine inlet pipe 5 is arranged on the top of the straight pipe 1 and inserted into the straight pipe 1, and a seal is set at the insertion opening.

[0041] Among them, the specific model of the chemical dosing flowmeter 14 is not limited, as long as it can know the medicine inlet flow rate and meet the use requirements.

[0042] Further, the inclined variable-frequency stirring assembly includes an inclined pipe 12, a rod body 9, a variable-frequency motor 13, and a controller 18. The inclined pipe 12 is threadedly connected to the top of the straight pipe 1. The rod body 9 penetrates through the inclined pipe 12 and is rotatably arranged in the inclined pipe 12. The end of the rod body 9 penetrating into the straight pipe 1 is fixedly connected with a stirring rod 16. The end of the rod body 9 penetrating out of the upper end of the inclined pipe 12 is connected to the variable-frequency motor 13, and the variable-frequency motor 13 is electrically connected to the controller 18.

[0043] Among them, the inclined tube 12 increases the projected area of the stirring rod 16 in the axial direction of the straight tube 1, making it easier to mix the produced liquid and the liquid medicine.

[0044] Among them, the controller 18 is electrically connected to the chemical dosing flowmeter 14 and the inlet liquid flowmeter 17 respectively. The controller is a PLC controller or other programmable variable-frequency motor driver. Under the control of the controller 18, the variable-frequency motor 13 adjusts the rotation speed of the variable-frequency motor 13 according to the chemical dosing flow and the liquid flow through the parameter calculation of its own internal program, and then adjusts the rotation speeds of the rod body 9 and the stirring rod 16 to achieve the purpose of optimal mixing.

[0045] Among them, the back of the variable-frequency motor 13 is fixedly connected to the back of the inclined tube 12 through the bracket 15.

[0046] Among them, a block 10 is fixedly connected to the inner side of the inclined tube 12, such as by welding or threaded connection. The inner side of the block 10 is rotatably connected to the outer side of the rod body 9 through a sealed bearing 11. The block 10 and the sealed bearing 11 are in interference fit, and the rod body 9 and the inclined tube 12 are in clearance fit, leaving a rotating space.

[0047] Among them, the sealed bearing 11 is a deep groove ball bearing with a sealing ring, and the sealed bearing 11 can prevent water from entering the inclined tube 12.

[0048] Furthermore, the flow disturbance partition plates include a first partition plate 3, a second partition plate 8, and a third partition plate 2. The first partition plate 3 and the third partition plate 2 are arranged at the bottom of the inner wall of the straight tube 1, and the second partition plate 8 is arranged at the top of the inner wall of the straight tube 1. The first partition plate 3 is located between the liquid medicine inlet pipe 5 and the inclined tube 12, the second partition plate 8 is located between the first partition plate 3 and the inclined tube 12, and the third partition plate 2 is located between the stirring rod 16 and the water outlet pipe 7.

[0049] Furthermore, the end position of the liquid medicine inlet pipe 5 inside the straight tube 1 is lower than the first partition plate 3, the position of the stirring rod 16 is lower than the second partition plate 8, and the water inlet pipe 6 and the water outlet pipe 7 are tangent to the bottom of the inner wall of the straight tube 1.

[0050] During maintenance and cleaning, the metering chemical dosing assembly, the variable-frequency stirring assembly, the water pipe 6, and the water outlet pipe 7 can be removed, and the first partition plate 3, the second partition plate 8, the third partition plate 2, and the included angle between them and the straight tube 1 can be cleaned from the installation holes of the variable-frequency stirring assembly, the water inlet pipe 6 holes, and the water outlet pipe 7 holes.

[0051] Among them, the first partition plate 3, the second partition plate 8, and the third partition plate 2 are all designed as semi-circles, which play a role in mixing the flow when the liquid passes through, improving the stirring effect.

[0052] Among them, the straight pipe 1 is divided into three short sections with the pipe segments between the first partition plate 3, the third partition plate 2, and the second partition plate 8 in pairs as nodes. Each short section only has one partition plate, and the short sections are connected by threads. The first partition plate 3, the second partition plate 8, and the third partition plate 2 are arranged on each short section by welding. Such an arrangement can make it possible to remove the stirring rod 16 first when connecting the inclined pipe 12, preventing the stirring rod 16 from interfering with the inner wall of the straight pipe 1 when screwing on at a large slope, and such an arrangement is also more convenient for cleaning and maintaining the inside of the straight pipe 1.

[0053] Embodiment 2:

[0054] On the basis of Embodiment 1, when using an intelligent chemical dosing and rapid mixing device for oilfield water treatment, the produced liquid and the chemical liquid enter the straight pipe 1 and are blocked by the first partition plate 3 together, flowing upward and mixing, flowing downward under the block of the third partition plate 2, and being fully mixed under the stirring of the stirring rod 16, and finally flowing out around the second partition plate 8. It combines the pipe turbulator mixing technology and the mechanical high-speed stirring and mixing technology.

[0055] During the mixing period, the chemical dosing flowmeter 14 on the one hand transmits the incoming chemical flow information to the controller 18, and on the other hand facilitates the controller 18 to control the incoming chemical flow, matching the incoming amount of the produced liquid recorded by the incoming liquid flowmeter 17; through the incoming liquid flowmeter 17 and the chemical dosing flowmeter 14, the incoming speed of the produced liquid and the incoming speed of the chemical liquid can be known respectively, and signals are transmitted to the controller 18, and the controller 18 drives the variable frequency motor 13 to adjust the rotation speed, so as to better match the actual working conditions.

[0056] The rotation speed of the variable frequency motor 13 can reach up to 5000 revolutions per minute at most, and under the control of the controller 18, it maintains the best mixing rotation speed, making the dosed chemicals fully mixed in the shortest time, creating good conditions for the next flocculation and purification, and thus improving the water quality.

[0057] In this application, all the components themselves that are not elaborated and the connection methods of the components in this application belong to the well-known technologies in this technical field. They can be directly applied and will not be elaborated further.

[0058] In the present utility model, the term "a plurality of" means two or more unless otherwise clearly defined. Terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0059] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. These terms are only used for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0060] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An intelligent reagent dosing and rapid mixing device for oilfield water treatment, comprising a straight pipe, wherein the two ends of the straight pipe are respectively provided with an inlet pipe and an outlet pipe, characterized in that: A metering dosing component and an oblique frequency conversion stirring component are installed on the top of the straight tube wall; The oblique variable frequency stirring assembly is located between the metering dosing assembly and the water outlet pipe; The inner wall of the straight pipe is provided with a spoiler baffle.

2. The intelligent reagent dosing and rapid mixing device for oilfield water treatment according to claim 1 is characterized in that: The metering dosing component comprises a liquid medicine inlet pipe, a dosing flow meter is installed on the liquid medicine inlet pipe, and the liquid medicine inlet pipe is arranged on the top of the straight pipe and inserted into the straight pipe.

3. The intelligent reagent dosing and rapid mixing device for oilfield water treatment according to claim 2 is characterized in that: The oblique variable frequency stirring assembly comprises an oblique tube, a rod body, a variable frequency motor, and a controller; The inclined tube is connected to the top of the straight tube, the rod body passes through the inclined tube and is rotatably arranged in the inclined tube, the end of the rod body passing through the straight tube is fixedly connected with a stirring rod, the end of the rod body passing through the upper end of the inclined tube is connected to a variable frequency motor, and the variable frequency motor is electrically connected to a controller.

4. The intelligent reagent dosing and rapid mixing device for oilfield water treatment according to claim 3 is characterized in that: The spoiler baffle comprises a first baffle, a second baffle and a third baffle, wherein the first baffle and the third baffle are arranged at the bottom of the inner wall of the straight tube, and the second baffle is arranged at the top of the inner wall of the straight tube; The first partition is located between the liquid medicine inlet pipe and the inclined pipe; The second baffle is located between the first baffle and the inclined tube; The third partition is located between the stirring rod and the water outlet pipe.

5. The intelligent reagent dosing and rapid mixing device for oilfield water treatment according to claim 4 is characterized in that: The position of the end of the medicine inlet pipe in the straight pipe is lower than the first partition, the position of the stirring rod is lower than the second partition, and the water inlet pipe and the water outlet pipe are tangent to the bottom of the inner wall of the straight pipe.

6. The intelligent reagent dosing and rapid mixing device for oilfield water treatment according to claim 3 is characterized in that: A liquid inlet flow meter is installed on the water inlet pipe; The controller is electrically connected to the dosing flow meter and the liquid inlet flow meter respectively. The controller is a programmable variable frequency motor driver. The controller adjusts the speed of the variable frequency motor according to the data of the dosing flow meter and the liquid inlet flow meter and its own preset program.

7. The intelligent reagent dosing and rapid mixing device for oilfield water treatment according to claim 3 is characterized in that: The back side of the variable frequency motor is fixedly connected to the back side of the inclined tube through a bracket.

8. The intelligent reagent dosing and rapid mixing device for oilfield water treatment according to claim 3 is characterized in that: A block is fixedly connected to the inner side of the inclined tube, and the inner side of the block is rotatably connected to the outer side of the rod through a sealed bearing. The block and the sealed bearing are interference fit, and the rod and the upper end of the inclined tube are clearance fit, leaving rotation space.

9. The intelligent reagent dosing and rapid mixing device for oilfield water treatment according to claim 8, characterized in that: Sealed bearings are deep groove ball bearings with sealing rings.

10. The intelligent reagent dosing and rapid mixing device for oilfield water treatment according to claim 4, characterized in that: The first partition plate, the second partition plate and the third partition plate are all semicircular.

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