A composite oilfield sewage treatment device

Abstract

The utility model relates to oilfield sewage treatment device technical field, specifically disclose a composite oilfield sewage treatment device, including support and collection jar, the upper end of support is passed through and is fixedly connected with the pretreatment jar, the below of pretreatment jar is provided with double centrifugal separation mechanism, double centrifugal separation mechanism includes the below of pretreatment jar outer wall and is communicated with two left and right distribution's shunt pipe, two the outer wall of shunt pipe all rotatively connects with internal thread frame, two internal thread frame's inside all are screw -threaded and are connected with the outer thread frame body in the inside of collection jar, the outer wall of outer thread frame body and bottom end all are passed through and are provided with a plurality of evenly distributed mesh, through the mechanical stirring demulsification of pretreatment jar and the coupling action of double centrifugal separation mechanism, realize solid -liquid material's separation, improve suspended solid removal efficiency, have somewhat improved compared with traditional single -stage centrifugal system efficiency, and can reduce the frequency of cleaning filter screen.

Description

Technical Field

[0001] This utility model relates to the technical field of oilfield wastewater treatment devices, and specifically discloses a composite oilfield wastewater treatment device. Background Technology

[0002] With the expansion of oilfield development and increasingly stringent environmental protection requirements, oilfield wastewater treatment technology has become a crucial aspect of the sustainable development of the petroleum industry. Oilfield produced water contains large amounts of suspended solids, emulsified oil, solid particles, and chemical additives, among other pollutants. Improper treatment can lead to problems such as pipeline corrosion, formation blockage, and ecological damage.

[0003] Existing treatment methods mostly employ processes such as gravity sedimentation, centrifugation, and filtration, but they still have significant drawbacks in practical applications: Single centrifugal separators have low processing efficiency and are difficult to handle high solids content and complex emulsion systems; the filter device is easily clogged by fine particles, requiring frequent cleaning or replacement of filter media, resulting in high maintenance costs; moreover, most existing centrifugal separators use welded filter screen structures, and replacement requires disassembling the entire machine flange, making each maintenance relatively time-consuming. Therefore, a composite oilfield wastewater treatment device is needed to solve the above problems. Utility Model Content

[0004] This invention proposes a composite oilfield wastewater treatment device. The bending distance can be adjusted as needed by adjusting the distance between two positioning plates, eliminating the need for frequent mold changes, reducing time consumption, and increasing efficiency.

[0005] This utility model is implemented as follows: a composite oilfield wastewater treatment device includes a support frame and a collection tank. The upper end of the support frame is connected to a pretreatment tank through and fixedly connected to it. A double centrifugal separation mechanism is provided below the pretreatment tank. The dual centrifugal separation mechanism includes two left-right distributed diversion pipes connected to the lower part of the outer wall of the pretreatment tank. The outer walls of the two diversion pipes are rotatably connected to internal threaded frames. The interior of the two internal threaded frames is threadedly connected to an external threaded frame located inside the collection tank. The outer wall and bottom end of the external threaded frame are provided with multiple evenly distributed mesh holes. The bottom end of the pretreatment tank is equipped with a first motor. The output end of the first motor is fixedly connected to a gear. The outer walls of the two internal threaded frames are fixedly connected to gear rings that mesh with the gear. The outer wall of the collection tank is fixedly connected to two symmetrically distributed support plates. The lower ends of the two support plates are equipped with electric actuators, and the output ends of the two electric actuators pass through the support plates and are fixedly connected to the bracket. The pretreatment tank is equipped with a stirring mechanism inside.

[0006] As a preferred embodiment of the composite oilfield wastewater treatment device of this utility model, the stirring mechanism includes a second motor installed above the pretreatment tank, the output end of the second motor passing through the pretreatment tank and fixedly connected to a stirring paddle.

[0007] In a preferred embodiment of the composite oilfield wastewater treatment device of this utility model, the lower ends of the two internal threaded frames are fixedly connected with sealing gaskets, and the two sealing gaskets are respectively tightly fitted to the two external threaded frames.

[0008] As a preferred embodiment of the composite oilfield wastewater treatment device of this utility model, both of the two diversion pipes are equipped with shut-off valves on their outer walls.

[0009] In a preferred embodiment of the composite oilfield wastewater treatment device of this utility model, a first reinforcing rod is fixedly connected between the pretreatment tank and the two diversion pipes, and a second reinforcing rod is fixedly connected between the two diversion pipes and the support.

[0010] In a preferred embodiment of this utility model, the two diversion pipes are connected to the two internal threaded frames via bearings.

[0011] As a preferred embodiment of the composite oilfield wastewater treatment device of this utility model, a controller is installed on the outer wall of the support plate.

[0012] The beneficial effects of this utility model are: (1) By coupling the mechanical stirring and demulsification of the pretreatment tank with the dual centrifugal separation mechanism, the solid and liquid substances are separated, the suspended solids removal efficiency is improved, the efficiency is higher than that of the traditional single-stage centrifugal system, and the frequency of cleaning the filter screen can be reduced.

[0013] (2) The threaded connection structure between the external threaded frame and the internal threaded bracket, combined with the lifting and adjustment function driven by the electric push rod, allows for quick disassembly and replacement of the filter module, resulting in shorter maintenance time and reduced maintenance costs. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 This is an overall structural diagram of a composite oilfield wastewater treatment device according to the present invention.

[0016] Figure 2 This is a disassembled structural diagram of the internal threaded bracket and the external threaded frame of this utility model.

[0017] Figure 3 This is a partial structural diagram of the present invention; Figure 4 This is a partial structural diagram of the present invention.

[0018] The markings in the diagram are: 1. Pretreatment tank; 2. Support; 3. Diverter pipe; 4. Internal threaded frame; 5. External threaded frame; 6. First motor; 7. Gear; 8. Gear ring; 9. Collection tank; 10. Support plate; 11. Electric actuator; 12. Second motor; 13. Agitator; 14. First reinforcing rod; 15. Second reinforcing rod. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0020] Please see Figure 1-4 A composite oilfield wastewater treatment device includes a support 2 and a collection tank 9. The upper end of the support 2 is connected to a pretreatment tank 1, and a double centrifugal separation mechanism is provided below the pretreatment tank 1. The dual centrifugal separation mechanism includes two left and right distributed diversion pipes 3 connected to the lower part of the outer wall of the pretreatment tank 1. The outer walls of the two diversion pipes 3 are rotatably connected to internal threaded frames 4. The interior of the two internal threaded frames 4 is threadedly connected to an external threaded frame 5 located inside the collection tank 9. The outer wall and bottom of the external threaded frame 5 are provided with multiple evenly distributed mesh holes. The bottom of the pretreatment tank 1 is equipped with a first motor 6. The output end of the first motor 6 is fixedly connected to a gear 7. The outer walls of the two internal threaded frames 4 are fixedly connected to a gear ring 8 that meshes with the gear 7. The outer wall of the collection tank 9 is fixedly connected to two symmetrically distributed support plates 10. Electric actuators 11 are installed at the lower ends of the two support plates 10. The output ends of the two electric actuators 11 pass through the support plates 10 and are fixedly connected to the bracket 2. The pretreatment tank 1 is equipped with a stirring mechanism.

[0021] In this embodiment: after the oily wastewater is injected into the pretreatment tank 1 through the inlet, the wastewater and demulsifier are thoroughly mixed by the stirring mechanism to break the emulsion state of the oil-water-solid three phases and promote subsequent separation. The pretreated mixture enters the bottom of the pretreatment tank 1 under the action of gravity. The first motor 6 drives the gear 7 to rotate, which in turn drives the two internal threaded frames 4 to rotate in opposite directions through the gear ring 8. The mixture enters the inner cavity of the high-speed rotating external threaded frame 5 tangentially through the diversion pipe 3. Under the action of centrifugal force, the suspended particles are deposited on the surface of the mesh at the bottom of the external threaded frame 5 to form a filter cake layer. When the mesh of the external threaded frame 5 is blocked, the shut-off valve of the corresponding diversion pipe 3 can be closed. The relative height between the bracket 2 and the collection tank 9 can be adjusted by the electric push rod 11, so that the external threaded frame 5 is moved above the collection tank 9. By rotating the external threaded frame 5 in the opposite direction, the external threaded frame 5 can be disassembled from the internal threaded frame 4 and then the external threaded frame 5 can be removed for cleaning.

[0022] As a technical optimization of this utility model, the stirring mechanism includes a second motor 12 installed above the pretreatment tank 1, and the output end of the second motor 12 passes through the pretreatment tank 1 and is fixedly connected to a stirring paddle 13.

[0023] In this embodiment: the second motor 12 is started to drive the stirring paddle 13 to rotate, so that the sewage and the demulsifier are fully mixed.

[0024] As a technical optimization of this utility model, the lower ends of the two internal threaded frames 4 are fixedly connected with sealing gaskets, and the two sealing gaskets are tightly fitted to the two external threaded frames 5 respectively.

[0025] In this embodiment, the connection between the internal threaded frame 4 and the external threaded frame 5 can be sealed by a sealing gasket.

[0026] As a technical optimization of this utility model, shut-off valves are installed on the outer walls of both diversion pipes 3.

[0027] In this embodiment, the opening and closing state of the diversion pipe 3 can be controlled by the shut-off valve.

[0028] As a technical optimization of this utility model, a first reinforcing rod 14 is fixedly connected between the pretreatment tank 1 and the two diversion pipes 3, and a second reinforcing rod 15 is fixedly connected between the two diversion pipes 3 and the support 2.

[0029] In this embodiment, the support strength of the two diversion pipes 3 can be increased by the cooperation of the first reinforcing rod 14 and the second reinforcing rod 15.

[0030] As a technical optimization of this utility model, the connection between the two diversion pipes 3 and the two internal threaded brackets 4 is rotatably connected by bearings.

[0031] In this embodiment, the internal threaded bracket 4 is allowed to rotate freely around the axis of the shunt tube 3 via the bearing.

[0032] As a technical optimization of this utility model, a controller is installed on the outer wall of the support plate 10.

[0033] In this embodiment, the first motor 6, the second motor 12, and the two electric actuators 11 are all electrically connected to the controller, and the first motor 6, the second motor 12, and the two electric actuators 11 can be controlled by the controller.

[0034] The working principle and usage process of this utility model are as follows: During use, oily wastewater is injected into the pretreatment tank 1 through the inlet. Then, the second motor 12 is started, driving the stirring paddle 13 to rotate, ensuring thorough mixing of the wastewater and demulsifier, breaking the emulsion state of the oil-water-solid three phases, and promoting subsequent separation. The pretreated mixture enters the bottom of the pretreatment tank 1 under gravity. The first motor 6 drives the gear 7 to rotate, which in turn drives the two internal threaded frames 4 to rotate in opposite directions via the gear ring 8. The mixture enters tangentially into the inner cavity of the high-speed rotating external threaded frame 5 through the diversion pipe 3. Under centrifugal force, suspended particles are deposited on the surface of the mesh at the bottom of the external threaded frame 5, forming a filter cake layer. When the mesh of the external threaded frame 5 is blocked, the shut-off valve of the corresponding diversion pipe 3 can be closed. The relative height between the bracket 2 and the collection tank 9 can be adjusted by the electric push rod 11, so that the external threaded frame 5 is moved above the collection tank 9. By rotating the external threaded frame 5 in the opposite direction, the external threaded frame 5 can be disassembled from the internal threaded frame 4 and then the external threaded frame 5 can be removed for cleaning.

[0035] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A composite oilfield wastewater treatment device, comprising a support frame (2) and a collection tank (9), characterized in that: The upper end of the support (2) is connected to the pretreatment tank (1), and a double centrifugal separation mechanism is provided below the pretreatment tank (1). The dual centrifugal separation mechanism includes two left-right distributed diversion pipes (3) connected to the lower part of the outer wall of the pretreatment tank (1). The outer walls of the two diversion pipes (3) are rotatably connected to internal threaded frames (4). The interior of the two internal threaded frames (4) is threadedly connected to an external threaded frame (5) located inside the collection tank (9). The outer wall and bottom of the external threaded frame (5) are provided with multiple evenly distributed mesh holes. The bottom of the pretreatment tank (1) is equipped with a first motor (6). The output end of the first motor (6) is fixedly connected to a gear (7). The outer walls of the two internal threaded frames (4) are fixedly connected to a gear ring (8) that meshes with the gear (7). The outer wall of the collection tank (9) is fixedly connected to two symmetrically distributed support plates (10). The lower ends of the two support plates (10) are equipped with electric push rods (11). The output ends of the two electric push rods (11) pass through the support plates (10) and are fixedly connected to the bracket (2). The pretreatment tank (1) is equipped with a stirring mechanism inside.

2. The composite oilfield wastewater treatment device according to claim 1, characterized in that: The stirring mechanism includes a second motor (12) installed above the pretreatment tank (1), and the output end of the second motor (12) passes through the pretreatment tank (1) and is fixedly connected to a stirring paddle (13).

3. The composite oilfield wastewater treatment device according to claim 1, characterized in that: The lower ends of the two internal threaded frames (4) are fixedly connected with sealing gaskets, and the two sealing gaskets are respectively tightly fitted to the two external threaded frames (5).

4. The composite oilfield wastewater treatment device according to claim 1, characterized in that: Both of the two diversion pipes (3) are equipped with shut-off valves on their outer walls.

5. A composite oilfield wastewater treatment device according to claim 1, characterized in that: The pretreatment tank (1) is fixedly connected to the two diversion pipes (3) with a first reinforcing rod (14), and the two diversion pipes (3) are fixedly connected to the support (2) with a second reinforcing rod (15).

6. A composite oilfield wastewater treatment device according to claim 1, characterized in that: The two diverter pipes (3) are connected to the two internal threaded brackets (4) by bearing rotation.

7. A composite oilfield wastewater treatment device according to claim 1, characterized in that: A controller is installed on the outer wall of the support plate (10).

Images