Integrated oil and gas field wastewater treatment plant

Abstract

The application relates to the technical field of sewage treatment, in particular to integrated oil and gas field sewage treatment equipment, which comprises a treatment box, a first partition plate and a second partition plate are fixed in the treatment box, the treatment box is divided into an electric flocculation reaction zone, an electrode reaction zone and a main reaction zone through the first partition plate and the second partition plate, a sewage pipe and a dosing pipe are communicated with the same end of the electric flocculation reaction zone, and sewage sequentially enters the electric flocculation reaction zone, the electrode reaction zone and the main reaction zone; a transverse partition plate and a cyclone device are arranged in the electric flocculation reaction zone, the transverse partition plate divides the electric flocculation reaction zone into an upper channel and a lower channel, one end of the upper channel and the lower channel is communicated, and the cyclone device is arranged in the upper channel and the lower channel and is used for deflecting the sewage and mixing the sewage with added reagents; after the sewage enters the treatment box, the sewage adopts a natural flowing mode to pass through various zones, and does not need to be pumped by additional equipment; and a motor and other equipment are not needed for stirring and mixing the sewage, so that the equipment cost and energy consumption are further reduced.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to integrated oil and gas field wastewater treatment equipment. Background Technology

[0002] Oil and gas field extraction generates a large amount of production wastewater. This type of wastewater is characterized by high levels of suspended solids, colloidal impurities, trace amounts of crude oil, complex water composition, and strong pollution. Direct discharge would severely pollute the soil and water environment. Therefore, it must undergo professional purification treatment before it can be discharged in compliance with standards or reinjected for reuse. At present, oil and gas field wastewater treatment mostly adopts segmented and graded treatment equipment, which achieves wastewater purification through multi-zone step-by-step reactions. This is the mainstream treatment method in the industry.

[0003] Currently, conventional oil and gas field wastewater treatment equipment relies mainly on external power equipment such as motors and stirring pumps to provide disturbance power during the pretreatment stage when wastewater enters the electrocoagulation reaction zone. This mechanical drive is used to mix the wastewater with flocculants and purification agents, thus completing the pretreatment work and providing basic water quality conditions for subsequent reactions.

[0004] However, this type of equipment relies on external power sources such as motors to drive the mixing process, requiring complete power transmission and control components. This results in a complex overall structure and a large footprint. In addition, continuous power consumption increases the energy consumption of the equipment and the cost of subsequent maintenance. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this invention is to provide an integrated oil and gas field wastewater treatment equipment, which solves the problems of the existing wastewater treatment equipment having a complicated overall structure, large footprint, high energy consumption during operation and high maintenance costs.

[0006] The technical solution adopted in this invention is as follows: an integrated oil and gas field wastewater treatment equipment, including a treatment tank, in which a first partition and a second partition are fixed, dividing the treatment tank into an electrocoagulation reaction zone, an electrode reaction zone, and a main reaction zone. A wastewater pipe and a dosing pipe are connected to the same end of the electrocoagulation reaction zone, and wastewater sequentially enters the electrocoagulation reaction zone, the electrode reaction zone, and the main reaction zone. The electrocoagulation reaction zone is equipped with a transverse partition and a swirling device. The transverse partition divides the electrocoagulation reaction zone into an upper channel and a lower channel, with one end of the upper channel and the lower channel connected. The swirling device is installed in the upper channel and the lower channel to deflect the wastewater and mix it with the added chemicals.

[0007] The principle of the technical solution: The treatment tank includes an electrocoagulation reaction zone, an electrode reaction zone, and a main reaction zone, which correspond to chemical dosing flocculation reaction, electrochemical reaction, and aeration mixing reaction, respectively. The sewage pipe is connected to the upstream process, and sewage is pumped into the treatment tank by equipment such as a water pump or centrifugal pump. The dosing pipe is connected to the dosing equipment to add flocculant. The flocculant is mixed into the sewage and flows with the sewage. The sewage flows from the upper channel to the lower channel. During the flow, it is obstructed by the vortex device, causing the sewage flow to repeatedly change direction and fully mix with the flocculant during the changing direction.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0009] 1. The present invention has a transverse partition in the electrocoagulation reaction zone, which divides the electrocoagulation reaction zone into an upper channel and a lower channel. One end of the upper channel and the lower channel are connected. This design can further extend the path and time of the flocculation reaction in a limited space. The swirl device in the upper channel and the lower channel can make the sewage and flocculant fully mixed, thereby improving the efficiency and effect of the flocculation reaction.

[0010] 2. In this application, the sewage flows naturally through each area after entering the treatment tank, without the need for additional pumping equipment. Moreover, the sewage mixing does not require motors or other equipment, further reducing equipment costs and energy consumption.

[0011] In a preferred embodiment of the present invention, the swirling device includes a plurality of baffles, which are arranged at an alternating angle and facing the direction of water flow.

[0012] Beneficial effects: The baffle plate is used to impede the flow of sewage and change its flow direction, so that the sewage and the agent are fully mixed during the baffle process; it is set to be inclined and facing the direction of water flow, which can also avoid the formation of sewage sedimentation zone between the sewage and the treatment tank while changing the sewage flow direction.

[0013] In a preferred embodiment of the present invention, the swirling device further includes a plurality of first rotating seats rotatably disposed in the transverse baffle, a plurality of swirling plates fixed on the first rotating seats, the swirling plates being arranged in a ring, and the first rotating seats being disposed near the water outlet of the baffle.

[0014] Beneficial effects: The first rotating seat is used to install the swirl plate, which is located at the water outlet of the baffle plate. Wastewater is guided by the baffle plate and flows out from the outlet (i.e., the gap between the baffle plate and the treatment tank). The amount of wastewater flowing out increases and the flow rate accelerates. The accelerated wastewater directly washes onto the swirl plate, causing it to rotate. The swirl plate further enhances the mixing effect of wastewater and chemicals.

[0015] In a preferred embodiment of the present invention, a large gear is fixedly connected to the first rotating seat, and the large gear is rotatably disposed in the transverse partition. The large gear meshes with a small gear, and the small gear is rotatably disposed in the transverse partition. A second rotating seat is fixedly connected to the small gear, and the second rotating seat extends out of the transverse partition and is fixedly connected to multiple baffles, which are arranged in a ring. The swirling plates and baffles in the same group, which are mutually driven by the large gear and the small gear, are respectively disposed on the upper and lower sides of the transverse partition. A sedimentation space is left between the baffles, the baffles and the bottom of the lower channel.

[0016] Beneficial effects: Since the swirl plate is located at the water outlet of the baffle plate, the addition of sewage will drive the swirl plate and the first rotating seat to rotate, which in turn drives the large gear and the small gear to rotate, transmitting power to the second rotating seat and the baffle plate, causing the baffle plate to rotate actively, further enhancing the mixing effect of sewage and chemicals; the baffle plate can be set in the slow-flow area outside the sewage flow path, which can improve the mixing effect and accelerate its flow velocity; the swirl plate and baffle plate in the same group are respectively set on the upper and lower sides of the transverse baffle plate; the kinetic energy of the sewage flow in the upper channel can be used to drive the lower channel. The baffles in the channel effectively stir the wastewater in the lower layer. When the treatment tank has a certain water level, the flow in the lower channel is slow, and the baffles can compensate for this by stirring, ensuring thorough mixing of the wastewater and the chemicals. Secondly, the swirl plates and baffles are separated by the transverse baffles and are set separately to prevent the wastewater swirls generated by the two from canceling each other out, thus reducing the flow velocity and weakening the mixing effect of the baffles. A sedimentation space is left between the baffles, baffles, and the bottom of the lower channel to allow the flocculation and sedimentation of the wastewater and chemicals after mixing. At the same time, the sedimentation space is staggered from the baffles to reduce the impact of the baffles on the sedimentation of the flocs.

[0017] In a preferred embodiment of the present invention, the upper surface of the transverse baffle is formed with a downward inclined surface along the water flow direction; the bottom of the lower channel is formed with a sedimentation inclined surface along the water flow direction, the inclination angle of the sedimentation inclined surface is 15°~20°, and the lower channel is provided with a filtrate discharge pipe with a valve near the lower end of the sedimentation inclined surface.

[0018] Beneficial effects: The upper surface of the diaphragm forms a downward inclined surface along the water flow direction, which makes the sewage and flocs more inclined to move downward, thus avoiding accumulation; the sedimentation slope is opposite to the water flow direction, and the inclination angle of the sedimentation slope is designed to be 15°~20°, which allows the flocs after the sewage reacts with the drug to gradually move to the lower side of the sedimentation slope under the action of gravity, and can be discharged and cleaned by opening the floc discharge pipe, reducing the amount of flocs entering the next reaction zone.

[0019] In a preferred embodiment of the present invention, the lower side of the first partition is provided with an opening that connects the electrocoagulation reaction zone and the electrode reaction zone; the electrode reaction zone is provided with a plurality of electrode plates, the electrode plates including positive electrode plates and negative electrode plates arranged opposite to each other, and drainage grooves are provided above both ends of the electrode reaction zone.

[0020] Beneficial effects: The opening is used to allow wastewater containing the mixed reagents to flow into the electrode reaction zone. Under the action of the electrode plate, the wastewater undergoes an electrolytic reaction and then flows out from the drainage trough at the top.

[0021] In a preferred embodiment of the present invention, the main reaction zone is provided with a mounting frame and a connecting pipe. The mounting frame is provided with multiple aeration discs. The connecting pipe is connected to the drainage trough and bends downward to connect with multiple branch pipes. The branch pipes are located above the mounting frame and are provided with multiple drainage nozzles, which correspond to multiple aeration discs.

[0022] Beneficial effects: The aeration disc sprays oxygen or air, which mixes directly with the sewage discharged from the branch pipe above, and the sewage is strongly blown by the gas to ensure thorough mixing; the discharge nozzle is trumpet-shaped to discharge sewage, and when the aeration is strong, the sewage is blown into an umbrella shape to improve the mixing effect.

[0023] In a preferred embodiment of the present invention, both the electrode reaction zone and the main reaction zone are provided with slag discharge bins, and a slag discharge pipe is connected below the slag discharge bins, which in turn connects to the sludge tank.

[0024] Beneficial effects: The slag discharge bin is used to collect and settle the solid waste residue and sludge after the reaction, and discharges them to the sludge tank through the slag discharge pipe. The slag discharge pipe can be equipped with a valve for control. When the sludge tank is installed, it is lower than the treatment box, so that the sludge and solid waste residue can be discharged directly by utilizing the height difference.

[0025] In a preferred embodiment of the present invention, a regulating box is provided on one side of the main reaction zone, and the regulating box is provided with a water outlet pipe and a regulating valve.

[0026] Beneficial effects: The regulating valve is used to open and close the outlet pipe, thereby regulating the water level in the main reaction zone by controlling the drainage.

[0027] In a preferred embodiment of the present invention, a box cover is fixedly connected to the upper end of the treatment box, and an exhaust pipe is connected to the upper end of the box cover, which is connected to the biological filter.

[0028] Beneficial effects: The cover is used to seal the treatment tank to prevent leakage of waste gas generated during the reaction, and the exhaust pipe concentrates the waste gas and transfers it to the biological filter for reaction and filtration. Attached Figure Description

[0029] Figure 1This is a schematic diagram of the integrated oil and gas field wastewater treatment equipment of the present invention.

[0030] Figure 2 This is a first-person perspective three-dimensional cross-sectional view of the integrated oil and gas field wastewater treatment equipment of the present invention.

[0031] Figure 3 This is a side view of the integrated oil and gas field wastewater treatment equipment of the present invention.

[0032] Figure 4 The integrated oil and gas field wastewater treatment equipment of this invention is based on Figure 3 A cross-sectional view of AA.

[0033] Figure 5 The integrated oil and gas field wastewater treatment equipment of this invention is based on Figure 3 A cross-sectional view of BB.

[0034] Figure 6 The integrated oil and gas field wastewater treatment equipment of this invention is based on Figure 3 Sectional view of CC.

[0035] Figure 7 This is another perspective sectional view of the integrated oil and gas field wastewater treatment equipment of the present invention.

[0036] The reference numerals in the accompanying drawings of the instruction manual include: 1. Treatment box; 2. First partition; 3. Second partition; 4. Electrocoagulation reaction zone; 5. Electrode reaction zone; 6. Main reaction zone; 7. Sewage pipe; 8. Dosing pipe; 9. Horizontal partition; 10. Upper channel; 11. Lower channel; 12. Baffle plate; 13. First rotating seat; 14. Swirl plate; 15. Large gear; 16. Small gear; 17. Second rotating seat; 18. Baffle plate; 19. Opening; 20. Electrode plate; 21. Drainage trough; 22. Mounting bracket; 23. Connecting pipe; 24. Aeration disc; 25. Branch pipe; 26. Drainage nozzle; 27. Slag discharge bin; 28. Slag discharge pipe; 29. ​​Regulating box; 30. Water outlet pipe; 31. Regulating valve; 32. Box cover; 33. Exhaust pipe; 34. Sedimentation slope; 35. Flocculation discharge pipe; 36. Cleaning scraper. Detailed Implementation

[0037] Typical embodiments embodying the features and advantages of the present invention will be specifically described in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0038] In the description of this application, the terms "first," "second," "side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure 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 application.

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] As attached Figure 1 and Figure 3 As shown, this invention provides an integrated oil and gas field wastewater treatment equipment, including a treatment tank 1. A first partition 2 and a second partition 3 are fixed inside the treatment tank 1, dividing it into an electrocoagulation reaction zone 4, an electrode reaction zone 5, and a main reaction zone 6. A wastewater pipe 7 and a dosing pipe 8 are connected to the same end of the electrocoagulation reaction zone 4. Wastewater sequentially enters the electrocoagulation reaction zone 4, the electrode reaction zone 5, and the main reaction zone 6. The electrocoagulation reaction zone 4, the electrode reaction zone 5, and the main reaction zone 6 correspond to the dosing flocculation reaction, the electrochemical reaction, and the aeration mixing reaction, respectively. The wastewater pipe 7 connects to the upstream process, and a water pump or centrifugal pump, etc., pumps the wastewater into the treatment tank 1. The dosing pipe 8 connects to a dosing device, adding flocculant. The flocculant mixes into the wastewater and flows with it.

[0041] The lower end of the dosing pipe 8 is closed, and multiple through holes are arranged vertically. This structure increases the vertical outflow position of the agent and expands the contact area with the sewage, thereby improving the sewage treatment effect. Specifically, the pipe of the dosing pipe 8 extending into the treatment tank 1 is configured as a rotating structure and is connected to the main dosing pipe through a rotary joint. The dosing pipe 8 can rotate freely, and the through holes are configured to form tangential outlets along the dosing pipe 8, with multiple through holes arranged in a downward spiral. When the agent flows out, the centrifugal force brought by the agent causes the dosing pipe 8 to rotate automatically, further improving the mixing effect with the sewage. In addition, the treatment tank 1 is equipped with a cleaning scraper 36, which is close to the surface of the dosing pipe 8. When the dosing pipe 8 rotates automatically or manually, the cleaning scraper 36 can be used to clean the flocculent material attached to its surface.

[0042] As attached Figure 2 As shown, in this embodiment, the electrocoagulation reaction zone 4 is provided with a transverse partition 9 and a swirling device. The transverse partition 9 divides the electrocoagulation reaction zone 4 into an upper channel 10 and a lower channel 11, with one end of the upper channel 10 and the lower channel 11 connected. The swirling device is installed in the upper channel 10 and the lower channel 11 to deflect the sewage and mix the sewage with the added agent. The sewage flows from the upper channel 10 to the lower channel 11, and during the flow, it is obstructed by the swirling device, causing the sewage flow to repeatedly deflect and fully mix with the flocculant during the deflection process.

[0043] As attached Figures 3-6As shown, in this embodiment, the swirling device includes multiple baffles 12 and multiple first rotating seats 13 rotatably disposed in the transverse partition 9. The baffles 12 are staggered and inclined, facing the direction of water flow. Multiple swirling plates 14 are fixed on the first rotating seats 13, and the swirling plates 14 are arranged in a ring. The first rotating seats 13 are located near the water flow outlet of the baffles 12. A large gear 15 is fixedly connected to the first rotating seats 13. The large gear 15 is rotatably disposed in the transverse partition 9, and the large gear 15 meshes with a small gear 16. Wheel 16 is rotatably mounted in the transverse partition 9; pinion 16 is fixedly connected to a second rotating seat 17, which extends out of the transverse partition 9 and is fixedly connected to multiple baffles 18, which are arranged in a ring; the swirling plates 14 and baffles 18 in the same group, which are mutually driven by the large gear 15 and the small gear 16, are respectively mounted on the upper and lower sides of the transverse partition 9; a sedimentation space is left between the baffles 12, the baffles 18 and the bottom of the lower channel 11, and the height of the sedimentation space is 1 / 3 to 1 / 2 of the height of the lower channel.

[0044] The baffle plate 12 is used to obstruct the flow of sewage and change its flow direction, so that the sewage and the agent are fully mixed during the baffle process. It is set to be inclined and facing the direction of water flow, so as to avoid the formation of sewage sedimentation zone with the treatment tank 1 while changing the sewage flow direction. The first rotating seat 13 is used to install the vortex plate 14. The vortex plate 14 is located at the water outlet of the baffle plate 12. The sewage is guided by the baffle plate 12 and flows out from the outlet (i.e., the gap between the baffle plate 12 and the treatment tank). The amount of sewage flowing out increases and the flow rate increases. The accelerated sewage directly washes onto the vortex plate 14, making it rotate. The vortex plate 14 is used to further enhance the mixing effect of sewage and agent.

[0045] In this embodiment, two sets of swirling plates 14 and baffles 18 are provided (the number and arrangement can be flexibly selected according to the size during specific processing). Since the swirling plates 14 are located at the water outlet of the baffle plate 12, the addition of sewage will drive the swirling plates 14 and the first rotating seat 13 to rotate, which in turn drives the large gear 15 and the small gear 16 to rotate, transmitting power to the second rotating seat 17 and the baffles 18, causing the baffles 18 to rotate actively, further enhancing the mixing effect of sewage and chemicals; the baffles 18 can be set in the slow-flow area outside the sewage flow path, which can improve the mixing effect. The flow rate can be accelerated. The swirl plate 14 and the baffle plate 18 in the same group are respectively set on the upper and lower sides of the transverse partition 9. The kinetic energy of the sewage flow in the upper channel 10 can be used to drive the baffle plate 18 in the lower channel 11 to achieve the effect of stirring the sewage in the lower layer. When the treatment tank 1 has a certain water level, the flow in the lower channel 11 is slow. The baffle plate 18 can be used to compensate for the stirring, so that the sewage and the agent are fully mixed. Secondly, the swirl plate 14 and the baffle plate 18 are separated by the transverse partition 9 and set separately, which can avoid the sewage swirl generated by the two from canceling each other out, thus reducing the flow rate and weakening the mixing effect of the baffle plate 12.

[0046] The upper surface of the diaphragm 9 forms a downward inclined surface along the water flow direction, which makes the sewage and flocs more inclined to move downward, thereby avoiding accumulation. The bottom of the lower channel 11 forms a sedimentation slope 34 that is inclined upward along the water flow direction. The inclination angle of the sedimentation slope 34 is 15°~20°. The lower channel 11 is provided with a floc discharge pipe 35 with a valve near the lower end of the sedimentation slope 34. The inclination angle of the sedimentation slope 34 is designed to be 15°~20°, which allows the flocs after the sewage reacts with the drug to gradually move to the lower side of the sedimentation slope 34 under the action of gravity. The flocs can be discharged and cleaned by opening the floc discharge pipe 35, reducing the amount of flocs entering the next reaction zone.

[0047] As attached Figure 7As shown, in this embodiment, the lower side of the first partition 2 is provided with an opening 19, which connects the electrocoagulation reaction zone 4 and the electrode reaction zone 5. The electrode reaction zone 5 is provided with multiple electrode plates 20, and drainage channels 21 are provided above both ends of the electrode reaction zone 5. The opening 19 is used to allow wastewater containing mixed reagents to flow into the electrode reaction zone 5. After the wastewater undergoes an electrolytic reaction under the action of the electrode plates 20, it flows out from the upper drainage channel 21. An adjustable plate that can slide up and down can be provided on the side of the drainage channel 21 near the electrode reaction zone 5. By sliding the adjustable plate up and down, the water level overflow in the electrode reaction zone 5 can be increased or decreased, thereby adjusting the degree to which the electrode plates 20 are submerged in the electrode reaction zone 5, thereby controlling energy consumption. For example, when the power consumption is low, the height of the adjustable plate can be lowered to allow the wastewater to flow out quickly, reducing the water level in the electrode reaction zone and reducing the contact area between the wastewater and the electrode plates, thereby achieving the effect of reducing energy consumption. When the load is high, the water level can be increased to increase the contact area and increase the wastewater treatment rate.

[0048] As attached Figure 3 and Figure 7 As shown, in this embodiment, the main reaction zone 6 is provided with a mounting frame 22 and a connecting pipe 23. The mounting frame 22 is provided with multiple aeration discs 24. The connecting pipe 23 is connected to the drainage trough 21 and bends downward to connect to multiple branch pipes 25. The branch pipes 25 are located above the mounting frame 22 and are provided with multiple drainage nozzles 26. The multiple drainage nozzles 26 correspond to the multiple aeration discs 24. The aeration discs 24 spray oxygen or air, and the gas is directly mixed with the sewage discharged from the branch pipes 25 above. The sewage is strongly blown by the gas to make the two fully mixed. The drainage nozzles 26 are trumpet-shaped and are used to discharge sewage. When the aeration is strongly blown, the sewage is blown into an umbrella shape to improve the mixing effect.

[0049] As attached Figure 1 and Figure 3As shown, in this embodiment, both the electrode reaction zone 5 and the main reaction zone 6 are equipped with slag discharge chambers 27. A slag discharge pipe 28 is connected below the slag discharge chamber 27, leading to a sludge tank. The slag discharge chamber 27 is used to collect and settle the solid waste residue and sludge after the reaction, and discharges them to the sludge tank through the slag discharge pipe 28. The slag discharge pipe 28 can be controlled by a valve. When installed, the sludge tank is lower than the treatment tank 1, allowing for direct discharge of sludge and solid waste residue using the elevation difference. An adjustment valve is provided on one side of the main reaction zone 6. The treatment tank 29 is equipped with an outlet pipe 30 and a regulating valve 31. The regulating valve 31 is used to open and close the outlet pipe 30 to regulate the water level in the treatment tank 1 by controlling the drainage. The upper end of the treatment tank 1 is fixedly connected to a tank cover 32, and the upper end of the tank cover 32 is connected to an exhaust pipe 33, which is connected to the biological filter. The tank cover 32 is used to seal the treatment tank 1 to prevent the leakage of waste gas generated by the reaction. The exhaust pipe 33 concentrates the waste gas and transfers it to the biological filter for reaction and filtration.

[0050] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An integrated oil and gas field wastewater treatment equipment, characterized in that: The system includes a treatment tank, inside which a first partition and a second partition are fixed, dividing the treatment tank into an electrocoagulation reaction zone, an electrode reaction zone, and a main reaction zone. A sewage pipe and a dosing pipe are connected to the same end of the electrocoagulation reaction zone, and sewage sequentially enters the electrocoagulation reaction zone, the electrode reaction zone, and the main reaction zone. The electrocoagulation reaction zone is equipped with a transverse partition and a swirling device. The transverse partition divides the electrocoagulation reaction zone into an upper channel and a lower channel, with one end of the upper channel and the lower channel connected. The swirling device is installed in the upper channel and the lower channel to deflect the sewage and mix it with the added chemicals.

2. The integrated oil and gas field wastewater treatment equipment according to claim 1, characterized in that: The swirling device includes multiple baffles that are staggered and inclined, and oriented towards the direction of water flow.

3. The integrated oil and gas field wastewater treatment equipment according to claim 2, characterized in that: The swirling device also includes multiple first rotating seats rotatably disposed in the transverse baffle. Multiple swirling plates are fixed on the first rotating seats and arranged in a ring. The first rotating seats are located near the water outlet of the baffle.

4. The integrated oil and gas field wastewater treatment equipment according to claim 3, characterized in that: The first rotating seat is fixedly connected to a large gear, which is rotatably disposed in the transverse partition. The large gear meshes with a small gear, which is rotatably disposed in the transverse partition. The small gear is fixedly connected to a second rotating seat, which extends out of the transverse partition and is fixedly connected to multiple baffles arranged in a ring. The swirling plates and baffles of the same group, which are mutually driven by the large gear and the small gear, are respectively disposed on the upper and lower sides of the transverse partition. A sedimentation space is left between the baffles, baffles and the bottom of the lower channel.

5. The integrated oil and gas field wastewater treatment equipment according to claim 1, characterized in that: The upper surface of the diaphragm forms a downward inclined surface along the direction of water flow; the bottom of the lower channel forms a sedimentation inclined surface that slopes upward along the direction of water flow, with an inclination angle of 15°~20°, and the lower channel is provided with a filtrate discharge pipe with a valve near the lower end of the sedimentation inclined surface.

6. The integrated oil and gas field wastewater treatment equipment according to claim 1, characterized in that: The first partition has an opening on its lower side, which connects the electrocoagulation reaction zone and the electrode reaction zone. The electrode reaction zone is provided with multiple electrode plates, including positive and negative electrode plates arranged opposite to each other. Drainage grooves are provided above both ends of the electrode reaction zone.

7. The integrated oil and gas field wastewater treatment equipment according to claim 1, characterized in that: The main reaction zone is equipped with an installation frame and connecting pipes. The installation frame is equipped with multiple aeration discs. The connecting pipes are connected to the drainage trough and bend downwards to connect to multiple branch pipes. The branch pipes are located above the installation frame and are equipped with multiple drainage nozzles, which correspond to multiple aeration discs.

8. The integrated oil and gas field wastewater treatment equipment according to claim 1, characterized in that: Both the electrode reaction zone and the main reaction zone are equipped with slag discharge bins, and slag discharge pipes are connected to the bottom of the slag discharge bins, which in turn connect to the sludge tank.

9. The integrated oil and gas field wastewater treatment equipment according to claim 1, characterized in that: A regulating box is provided on one side of the main reaction zone, and the regulating box contains a water outlet pipe and a regulating valve.

10. The integrated oil and gas field wastewater treatment equipment according to claim 1, characterized in that: The upper end of the treatment tank is fixedly connected to a tank cover, and the upper end of the tank cover is connected to an exhaust pipe, which is connected to the biological filter.

Images