Oil-gas field air floatation synergistic oil-water separation device

Abstract

The utility model relates to the technical field of oily sewage treatment, and discloses an oil and gas field air floatation synergistic oil and water separation device which comprises an oil and water separation tank, a reciprocating motion assembly used for driving a scraper blade to reciprocate is arranged on the outer wall of the oil and water separation tank, and a filter screen is fixedly connected to the inner wall of the oil and water separation tank. The outer wall of the filter screen is fixedly connected with a feeding pipe, the outer wall of the feeding pipe is fixedly connected with a primary filter, the inner wall of the primary filter is sleeved with a secondary filter, the outer wall of the feeding pipe is fixedly connected with a discharging box, the inner wall of the discharging box is fixedly connected with two inclined plates, and the bottom of the discharging box is provided with a drain outlet. According to the oil-water separation reaction device, large and small garbage or impurities in an oil-water mixture are filtered through multi-stage filtration before oil-water separation reaction, so that the efficiency of the oil-water mixture in the separation reaction is improved, the effect is better, and the working efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of oily wastewater treatment technology, and in particular to an oil and gas field flotation-enhanced oil-water separation device. Background Technology

[0002] Air flotation oil-water separators separate oil and water by injecting microbubbles into oily wastewater, causing oil droplets to adhere to them and float to the surface, thus achieving oil-water separation. The air flotation layer formed by the bubbles effectively increases the rising speed and aggregation effect of oil droplets. It is widely used in produced water treatment during oil and gas field development, effectively removing dispersed oil and emulsified oil from the water. It is also used in wastewater treatment systems at oil and gas field production sites to ensure that wastewater meets discharge standards or is reused. Its high efficiency and compact design play a crucial role in space-constrained areas such as offshore oil and gas platforms.

[0003] The air flotation oil-water separation device mainly consists of a dissolved air system, including a dissolved air tank and an air compressor, which is responsible for generating microbubbles, the foundation for air flotation. Next is the reaction zone, where wastewater and bubbles fully mix and react, allowing oil droplets to float better on the surface of the oil-water mixture. Then comes the air flotation separation zone, the main site where oil droplets rise and oil-water separation is achieved.

[0004] In existing technologies, some air flotation oil-water separation devices generally separate oil and water by directly adding the oil-water mixture to the reaction zone, lacking a multi-stage filtration step. This can significantly lead to impurities or waste in the oil-water separation process, affecting the purity of the oil-water separation or directly impacting its effectiveness. Therefore, an oil-water separation device for enhancing the efficiency of air flotation in oil and gas fields is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an oil-water separation device for enhancing the efficiency of air flotation in oil and gas fields. It aims to improve the problem that some existing air flotation oil-water separation devices generally separate oil and water by directly adding the oil-water mixture to the reaction zone of the oil-water separation, and lack a multi-stage filtration step.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An oil-water separation device for enhancing the efficiency of flotation in oil and gas fields includes an oil-water separation tank. The outer wall of the oil-water separation tank is provided with a reciprocating motion component for driving a scraper to reciprocate. A filter screen is fixedly connected to the inner wall of the oil-water separation tank. A feed pipe is fixedly connected to the outer wall of the filter screen. A primary filter is fixedly connected to the outer wall of the feed pipe. A secondary filter is sleeved on the inner wall of the primary filter. A discharge box is fixedly connected to the outer wall of the feed pipe. Two inclined plates are fixedly connected to the inner wall of the discharge box. A sewage outlet is provided at the bottom of the discharge box.

[0008] As a further description of the above technical solution:

[0009] The reciprocating motion assembly includes a fixed plate, which is fixedly connected to the outer wall of the oil-water separator. A motor is fixedly connected to the outer wall of the oil-water separator. A transmission gear is rotatably connected to the inner wall of the fixed plate. A control gear is rotatably connected to the inner wall of the fixed plate. A turntable is slidably connected to the inner wall of the fixed plate.

[0010] As a further description of the above technical solution:

[0011] A connecting rod is fixedly connected to the outer wall of the turntable, and a scraper is fixedly connected to the other end of the connecting rod. The other end of the primary filter is fixedly connected to the inner wall of the discharge box, and the other end of the secondary filter is fixedly connected to the inner wall of the discharge box. The outer wall of the turntable is fixedly connected to the outer wall of the transmission gear.

[0012] As a further description of the above technical solution:

[0013] An air pump is fixedly connected to the inner wall of the oil-water separator, and an energy generator is fixedly connected to the inner wall of the oil-water separator.

[0014] As a further description of the above technical solution:

[0015] A bubble generator is fixedly connected to the outer wall of the oil-water separator, and the outlet end of the bubble generator is fixedly connected to the inner wall of the efficiency unit.

[0016] As a further description of the above technical solution:

[0017] A feeder is fixedly connected to the top of the discharge box, and a feed inlet is fixedly connected to the outer wall of the feeder;

[0018] As a further description of the above technical solution:

[0019] A baffle is fixedly connected to the inner wall of the oil-water separator, an oil outlet is fixedly connected to the outer wall of the oil-water separator, and a water pump is installed on the inner wall of the feed pipe.

[0020] As a further description of the above technical solution:

[0021] The outer wall of the oil-water separator is fixedly connected to a water outlet, and the bottom of the discharge box is fixedly connected to multiple support frames. The outer teeth of the control gear and the outer teeth of the transmission gear are meshed with each other, and the outer wall of the control gear is fixedly connected to the drive end of the motor.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, when the oil-water mixture falls into the first-stage filter, the grooves on the surface of the first-stage filter will prevent larger impurities from being filtered out. The second-stage filter will filter out smaller impurities. The filter screen will further filter the impurities in the oil-water mixture. After sedimentation, the impurities will fall onto the surface of the inclined plate and can be discharged through the drain port. By adding a multi-stage filtration process, impurities can be removed from the oil-water mixture before processing, which can improve the purification efficiency and effect.

[0024] 2. In this utility model, the air pump starts and blows air to blow the surface bubbles into the oil storage chamber separated by the baffle. During this process, the motor drives the control gear to rotate, and the drive transmission gear of the control gear rotates. The rotation of the rotating gear drives the turntable to rotate. The rotation of the turntable drives the scraper to reciprocate through the connecting rod, scraping the oil-water mixture and the oil mixed with the bubbles into the interior of the oil storage chamber. The air pump and the reciprocating scraper allow the purified oil to enter the oil storage chamber for storage, which can collect the processed air flotation oil more effectively and quickly, greatly improving work efficiency. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of an oil-water separation device for enhancing the efficiency of air flotation in oil and gas fields, as proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the feeder of an oil-water separation device for enhancing the efficiency of air flotation in oil and gas fields, as proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the structure of the air pump of the oil-water separation device for enhancing the efficiency of air flotation in oil and gas fields proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the oil outlet of an oil flotation-enhanced oil-water separation device for oil and gas fields proposed in this utility model.

[0029] Legend:

[0030] 1. Oil-water separator; 2. Filter screen; 3. Feed pipe; 4. Primary filter; 5. Drain outlet; 6. Inclined plate; 7. Secondary filter; 8. Feeder; 9. Control gear; 10. Transmission gear; 11. Efficient device; 12. Connecting rod; 13. Scraper; 14. Fixing plate; 15. Motor; 16. Feed inlet; 17. Discharge box; 18. Support frame; 19. Water outlet; 20. Air pump; 21. Baffle; 22. Bubble generator; 23. Oil outlet; 24. Turntable; 25. Water pump. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 , Figure 2 and Figure 3 This utility model provides an embodiment of an oil-water separation device for enhancing the efficiency of flotation in oil and gas fields. It includes an oil-water separation tank 1, which provides a space for oil-water separation. The outer wall of the tank is equipped with a reciprocating motion assembly for driving a scraper 13 to reciprocate. The reciprocating motion of the scraper 13 effectively removes surface-floated oil. A filter screen 2 is fixedly connected to the inner wall of the tank, further filtering the already filtered oil-water mixture. An inlet pipe 3 is fixedly connected to the outer wall of the filter screen 2, controlling the oil-water mixture's entry into the outlet tank 17. A primary filter 4 is fixedly connected to the outer wall of the inlet pipe 3, filtering larger impurities and debris. A secondary filter 7 is fitted inside the primary filter 4, filtering smaller impurities and debris.

[0033] The other end of the primary filter 4 is fixedly connected to the inner wall of the discharge box 17, and the other end of the secondary filter 7 is fixedly connected to the inner wall of the discharge box 17. The outer wall of the feed pipe 3 is fixedly connected to the discharge box 17. The oil-water mixture filtered out by the discharge box 17 enters the interior of the oil-water separator 1. The inner wall of the discharge box 17 is fixedly connected to two inclined plates 6, which facilitate the discharge of impurities and garbage. The bottom of the discharge box 17 is provided with a drain port 5, which is used to discharge impurities and garbage. The top of the discharge box 17 is fixedly connected to a feeder 8, which is used to add the unseparated oil-water mixture. The outer wall of the feeder 8 is fixedly connected to a feed inlet 16. The inner wall of the oil-water separator 1 is fixedly connected to a baffle 21, which is used to separate the oil-water separation area from the oil storage area of ​​the purified oil.

[0034] An oil outlet 23 is fixedly connected to the outer wall of the oil-water separator 1 for discharging purified oil. A water pump 25 is installed on the inner wall of the feed pipe 3 for extracting the oil-water mixture. A water outlet 19 is fixedly connected to the outer wall of the oil-water separator 1 for discharging the water after oil-water separation. Multiple support frames 18 are fixedly connected to the bottom of the discharge box 17. The outer teeth of the control gear 9 are meshed with the outer teeth of the transmission gear 10. The outer wall of the control gear 9 is fixedly connected to the drive end of the motor 15 for driving the control gear 9 to rotate.

[0035] Reference Figure 1 , Figure 2 and Figure 4 The reciprocating motion assembly includes a fixed plate 14, which is used to fix the reciprocating motion assembly. The fixed plate 14 is fixedly connected to the outer wall of the oil-water separator 1. A motor 15 is fixedly connected to the outer wall of the oil-water separator 1. The motor 15 is used to drive the control gear 9 to rotate. A transmission gear 10 is rotatably connected to the inner wall of the fixed plate 14. The rotation of the control gear 9 is used to drive the transmission gear 10 to rotate. A turntable 24 is slidably connected to the inner wall of the fixed plate 14. The outer wall of the turntable 24 is fixedly connected to the outer wall of the transmission gear 10. The rotation of the transmission gear 10 drives the turntable 24 to rotate.

[0036] A connecting rod 12 is fixedly connected to the outer wall of the turntable 24, and a scraper 13 is fixedly connected to the other end of the connecting rod 12. The rotation of the turntable 24 drives the connecting rod 12 to rotate, and the rotation of the connecting rod 12 drives the scraper 13 to scrape back and forth. An air pump 20 is fixedly connected to the inner wall of the oil-water separator 1. The air pump 20 is used to blow out airflow to push the air-flotated oil to the oil storage chamber separated by the baffle 21. An energy generator 11 is fixedly connected to the inner wall of the oil-water separator 1. The energy generator 11 is used to enhance the air flotation effect. A bubble generator 22 is fixedly connected to the outer wall of the oil-water separator 1. The bubble generator 22 is used to produce bubbles. The oil adheres to the bubbles generated by the bubble generator. The outlet end of the bubble generator 22 is fixedly connected to the inner wall of the energy generator 11.

[0037] Working principle: When oil-water separation is required, the oil-water mixture inside the feeder 8 will fall into the discharge box 17. There may be some impurities of the same size in the oil-water mixture. If too many impurities enter the oil-water tank for oil-water separation, it may reduce the purity of the oil-water separation. When the oil-water mixture falls into the primary filter 4, the grooves on the surface of the primary filter 4 will prevent larger impurities from being filtered. The secondary filter 7 will filter smaller impurities. The filter screen 2 will further filter the impurities in the oil-water mixture. After the impurities settle, they will fall onto the surface of the inclined plate 6 and be discharged through the drain port 5. Then the water pump 25 will draw out the oil-water mixture from the feed box.

[0038] When the filtered oil-water mixture enters the oil-water separator 1, the bubble generator 22 is activated, dissolving air in the water under a certain pressure to form dissolved air water. When the pressure of the dissolved air water decreases, the supersaturated air in the water is released in the form of tiny bubbles. Then, the enhancer is activated to strengthen the flotation effect, making the bubbles more uniform, smaller, and more stable, thereby increasing the probability of contact between the bubbles and oil droplets. At this time, the oil in the oil-water mixture floats to the surface with the bubbles. The air pump 20 is activated to blow the surface bubbles into the oil storage chamber separated by the baffle 21. During this process, the motor 15 drives the control gear 9 to rotate, and the drive transmission gear 10 of the control gear 9 rotates. The rotation of the rotating gear drives the turntable 24 to rotate. The rotation of the turntable 24 drives the scraper 13 to reciprocate through the connecting rod 12 to scrape the oil-water mixture and the oil fused with the bubbles into the interior of the oil storage chamber.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An oil-water separation device for enhancing the efficiency of gas flotation in oil and gas fields, comprising an oil-water separation tank (1), characterized in that: The outer wall of the oil-water separator (1) is provided with a reciprocating motion assembly for driving the scraper (13) to reciprocate. The inner wall of the oil-water separator (1) is fixedly connected with a filter screen (2). The outer wall of the filter screen (2) is fixedly connected with a feed pipe (3). The outer wall of the feed pipe (3) is fixedly connected with a primary filter (4). The inner wall of the primary filter (4) is fitted with a secondary filter (7). The outer wall of the feed pipe (3) is fixedly connected with a discharge box (17). The inner wall of the discharge box (17) is fixedly connected with two inclined plates (6). The bottom of the discharge box (17) is provided with a drain outlet (5).

2. The oil-water separation device for enhancing efficiency through flotation in oil and gas fields according to claim 1, characterized in that: The reciprocating motion assembly includes a fixed plate (14), which is fixedly connected to the outer wall of the oil-water separator (1). A motor (15) is fixedly connected to the outer wall of the oil-water separator (1). A transmission gear (10) is rotatably connected to the inner wall of the fixed plate (14). A control gear (9) is rotatably connected to the inner wall of the fixed plate (14). A turntable (24) is slidably connected to the inner wall of the fixed plate (14).

3. The oil-water separation device for enhancing efficiency through flotation in oil and gas fields according to claim 2, characterized in that: A connecting rod (12) is fixedly connected to the outer wall of the turntable (24), and the outer wall of the turntable (24) is fixedly connected to the outer wall of the transmission gear (10). A scraper (13) is fixedly connected to the other end of the connecting rod (12). The other end of the primary filter (4) is fixedly connected to the inner wall of the discharge box (17), and the other end of the secondary filter (7) is fixedly connected to the inner wall of the discharge box (17).

4. The oil-water separation device for enhancing efficiency through flotation in oil and gas fields according to claim 1, characterized in that: An air pump (20) is fixedly connected to the inner wall of the oil-water separator (1), and an energy generator (11) is fixedly connected to the inner wall of the oil-water separator (1).

5. The oil-water separation device for enhancing the efficiency of gas flotation in oil and gas fields according to claim 4, characterized in that: A bubble generator (22) is fixedly connected to the outer wall of the oil-water separator (1), and the outlet end of the bubble generator (22) is fixedly connected to the inner wall of the power unit (11).

6. The oil-water separation device for enhancing efficiency through flotation in oil and gas fields according to claim 1, characterized in that: The top of the discharge box (17) is fixedly connected to a feeder (8), and the outer wall of the feeder (8) is fixedly connected to a feed inlet (16).

7. The oil-water separation device for enhancing efficiency through flotation in oil and gas fields according to claim 1, characterized in that: The inner wall of the oil-water separator (1) is fixedly connected to a baffle (21), the outer wall of the oil-water separator (1) is fixedly connected to an oil outlet (23), and the inner wall of the feed pipe (3) is equipped with a water pump (25).

8. The oil-water separation device for enhancing the efficiency of gas flotation in oil and gas fields according to claim 2, characterized in that: The outer wall of the oil-water separator (1) is fixedly connected to a water outlet (19), and the bottom of the discharge box (17) is fixedly connected to multiple support frames (18). The outer wall teeth of the control gear (9) and the outer wall teeth of the transmission gear (10) are meshed with each other. The outer wall of the control gear (9) is fixedly connected to the drive end of the motor (15).

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