CN213895275U - Self-gas circulation air-flotation solid-liquid separation device for oil field produced water treatment - Google Patents
Self-gas circulation air-flotation solid-liquid separation device for oil field produced water treatment Download PDFInfo
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Abstract
The utility model discloses a self-gas circulation air-flotation solid-liquid separation device for oil field produced water treatment, which relates to the technical field of oil field produced water treatment and specifically comprises an air-flotation separation tank, a dissolved air pump, a dissolved air tank and a recovery tank; and the air floatation separation tank is respectively provided with a liquid inlet pipeline, a water outlet pipeline and an exhaust pipeline. The air floatation separation tank is communicated with the recovery tank through an exhaust pipeline. The dissolved air pump is communicated with the water outlet pipeline through a circulating water pipeline. The dissolved air pump is communicated with the dissolved air tank through a circulating dissolved air water pipeline. The dissolved air tank is communicated with the liquid inlet pipeline through a dissolved air liquid pipeline. The recycling tank is communicated with the circulating water pipeline through a circulating gas pipeline. And the outside of the recovery tank is communicated with an air supplementing system. Compared with the prior art, the beneficial effects of the utility model are that: not only realizes the air floatation separation treatment of the produced water in the oil field, but also makes full use of the gas carried in the produced water and avoids the discharge of VOCs and harmful gas.
Description
Technical Field
The utility model relates to an oil field extraction water treatment technical field, concretely relates to oil field extraction water treatment is from gas circulation air supporting solid-liquid, liquid-liquid separation equipment.
Background
The air flotation process is an important process for treating oilfield produced water and is generally used as pretreatment of advanced treatment such as subsequent treatment of gravity settling or resource treatment. The air floatation process is to accelerate the floating speed under the action of buoyancy by the adhesion of micro bubbles and oil droplets formed in the produced water, so as to achieve the purposes of oil-water separation and water purification.
Most of the traditional air floatation processes adopt an air compressor or a fan to provide an air source, and are usually normal-pressure open containers, bubbles float to the liquid level and disappear after being treated in air floatation, and the air floatation processes have large gas loss and high energy consumption. The gases carry a small amount of pollutants into the atmosphere, and the generated VOCs gases cause secondary pollution to the surrounding environment. Hydrogen sulfide and flammable and explosive gases contained in the produced water of the oil field are emitted to the surrounding environment, and the danger of poisoning and fire is increased.
SUMMERY OF THE UTILITY MODEL
The utility model provides an oil field extraction water treatment is from gas circulation air supporting solid-liquid, liquid-liquid separation equipment, its characteristics are and have both realized oil field extraction water air supporting separation treatment, and the emission of VOCs and harmful gas has been avoided to the gas that carries in make full use of extraction aquatic again.
In order to achieve the above object, the utility model provides a following technical scheme: an oil field produced water treatment self-gas circulation air-flotation solid-liquid separation device comprises an air-flotation separation tank, a dissolved air pump, a dissolved air tank and a recovery tank; and the air floatation separation tank is respectively provided with a liquid inlet pipeline, a water outlet pipeline and an exhaust pipeline.
The air floatation separation tank is communicated with the recovery tank through an exhaust pipeline.
The dissolved air pump is communicated with the water outlet pipeline through a circulating water pipeline.
The dissolved air pump is communicated with the dissolved air tank through a circulating dissolved air water pipeline.
The dissolved air tank is communicated with the liquid inlet pipeline through a dissolved air liquid pipeline.
The recycling tank is communicated with the circulating water pipeline through a circulating gas pipeline.
And the outside of the recovery tank is communicated with an air supplementing system.
As optimization, a gas pressure regulating device is arranged on the recovery tank; one end of the circulating gas pipeline is communicated with the gas pressure regulating and controlling device, and the other end of the circulating gas pipeline is communicated with the circulating water pipeline.
And as optimization, the water outlet pipeline, the circulating water pipeline, the circulating gas pipeline, the exhaust pipeline, the circulating dissolved gas water pipeline and the dissolved gas liquid pipeline are all provided with switch valves.
And as optimization, the water outlet pipeline, the circulating water pipeline, the circulating gas pipeline, the exhaust pipeline, the circulating dissolved gas water pipeline and the dissolved gas liquid pipeline are respectively provided with a flowmeter and a pressure gauge.
As optimization, an automatic control system is also arranged; and the automatic control system is connected with the air supplementing system, the switch valve, the flowmeter and the pressure gauge.
Preferably, the gas supplementing system is a nitrogen making device.
Preferably, a medicament adding pipeline is arranged on the liquid inlet pipeline.
And optimally, a mixer is arranged on a liquid inlet pipeline between the medicament adding pipeline and the air flotation separation tank.
As optimization, the water outlet pipeline is positioned at the lower side of the air floatation separation tank; the horizontal height of the port of the water outlet pipeline on the air floatation separation tank is lower than that of the port of the liquid inlet pipeline on the air floatation separation tank.
Preferably, the gas pressure regulating device is positioned at the top of the recovery tank.
Compared with the prior art, the beneficial effects of the utility model are as follows: aiming at the defects that the energy loss caused by the gas released in the separation process of the traditional air floatation device and the pollution to the surrounding environment caused by the generation of VOCs and harmful gas and the like, an air floatation solid-liquid separation and liquid-liquid separation device which is applied to the treatment of oilfield produced water and is recycled by gas is developed. The device I can fully recycle gas carried in produced water and redundant gas generated by air floatation separation, has good treatment efficiency and low energy consumption, avoids the discharge of VOCs and harmful gas, and has no secondary pollution; secondly, negative pressure air suction is adopted, so that the air dissolving effect is stable, and the separation effect is good; thirdly, nitrogen is adopted for supplementing gas, so that the safety and stability are high, and energy conservation and consumption reduction can be realized; and fourthly, automatic control is adopted, operation management is facilitated, and unattended operation can be realized.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The system comprises an air flotation separation tank 1, a dissolved air pump 2, a dissolved air tank 3, a recovery tank 4, a gas pressure regulating device 5, an air supplementing system 6, a liquid inlet pipeline 7, a water outlet pipeline 8, a circulating water pipeline 9, a circulating gas pipeline 10, an exhaust pipeline 11, a circulating dissolved gas water pipeline 12 and a dissolved gas liquid pipeline 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
An oil field produced water treatment self-gas circulation air-float solid-liquid separation device comprises an air-float separation tank 1, a dissolved air pump 2, a dissolved air tank 3 and a recovery tank 4; the air floatation separation tank 1 is respectively provided with a liquid inlet pipeline 7, a water outlet pipeline 8 and an exhaust pipeline 11.
The air flotation separation tank 1 is communicated with the recovery tank 4 through an exhaust pipeline 11.
The dissolved air pump 2 is communicated with the water outlet pipeline 8 through a circulating water pipeline 9.
The dissolved air pump 2 is communicated with the dissolved air tank 3 through a circulating dissolved air water pipeline 12.
The dissolved air tank 3 is communicated with the liquid inlet pipeline 7 through a dissolved air liquid pipeline 13.
The recovery tank 4 is communicated with the circulating water pipeline 9 through a circulating gas pipeline 10.
And an air supplementing system 6 is communicated outside the recovery tank 4. The gas supplementing system 6 is a nitrogen making device.
The recovery tank 4 is provided with a gas pressure regulating device 5; the gas pressure regulating device 5 is located at the top of the recovery tank 4. One end of the circulating gas pipeline 10 is communicated with the gas pressure regulating device 5, and the other end of the circulating gas pipeline 10 is communicated with the circulating water pipeline 9.
And the water outlet pipeline 8, the circulating water pipeline 9, the circulating gas pipeline 10, the gas exhaust pipeline 11, the circulating gas-dissolved water pipeline 12 and the gas-dissolved liquid pipeline 13 are all provided with a switch valve, a flowmeter and a pressure gauge.
An automatic control system is also arranged; and the automatic control system is connected with the air supplementing system 6, the switch valve, the flowmeter and the pressure gauge.
And a medicament adding pipeline is arranged on the liquid inlet pipeline 7. A mixer is arranged on the liquid inlet pipeline 7 between the medicament adding pipeline and the air flotation separation tank 1.
The water outlet pipeline 8 is positioned at the lower side of the air floatation separation tank 1; the horizontal height of the port of the water outlet pipeline 8 on the air floatation separation tank 1 is lower than the horizontal height of the port of the liquid inlet pipeline 7 on the air floatation separation tank 1.
The working principle is as follows:
the oil field produced water, the reverse-phase demulsifier (which can not be added) and the backflow dissolved gas water respectively enter the air floatation separation tank 1 through the liquid inlet pipeline 7, the medicament adding pipeline (not shown in the figure) and the dissolved gas liquid pipeline 13 after being mixed in the mixer (not shown in the figure), the backflow dissolved gas water releases micro bubbles, the micro bubbles are combined with oil drops and the reverse-phase demulsifier to form an air floating body with the density far less than that of water, the air floating body quickly floats upwards and is converged to the top of the air floatation separation tank 1, and the gas carried in the oil field produced water and the redundant gas generated by air floatation separation enter the recovery tank 4 through the exhaust pipeline 11. The recovery tank 4 is provided with a gas pressure regulating device 5, gas is used as a gas source of the backflow gas-dissolved water, gas suction and water suction are carried out simultaneously through a circulating gas pipeline 10 and a circulating water pipeline 9 under the action of a gas-dissolved pump 2, gas-liquid mixing is realized through pressurization of the gas-dissolved pump 2 to form backflow gas-dissolved water, and the backflow gas-dissolved water enters a gas-dissolved tank 3 and is conveyed to the gas-flotation separation tank 1 through a gas-dissolved liquid pipeline 13 for utilization; the missing gas is controlled and supplemented by the nitrogen making device through an automatic control system, the interlocking regulation and control of the nitrogen supplementing quantity and the air suction pressure are realized, and the pressure in the recovery tank 4 is kept constant and adjustable.
Wherein, the automatic control system adopts full-automatic operation; the automatic oil collection and automatic exhaust can be realized; the dissolved gas water amount can be interlocked with the device operation flow or pressure for automatic adjustment, so that the optimal treatment effect is ensured; the online detection and real-time remote transmission of production data such as water quantity, pressure, operation state and the like can be realized, a data report and an operation curve are automatically generated, and an alarm is automatically given when the data are abnormal; and the running state of the equipment is detected on line, and the fault automatic alarm is given. The device can also be matched with video monitoring facilities and can remotely transmit video signals in real time. The whole set of automatic control system can be connected with a computer through a network and also can be connected with a mobile phone, and an operation manager can realize real-time mastering of operation data and remote regulation and control of the device through the computer or the mobile phone.
Furthermore, the backflow dissolved air water formed by negative pressure suction of the dissolved air pump 2 is milk-white, the disappearance time of bubbles in a 1000mL measuring cylinder is more than 4min, the backflow dissolved air water enters the air floatation separation tank 1 to dissolve air stably, and the air floatation treatment effect is good.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. An oil field produced water treatment self-gas circulation air-float solid-liquid separation device comprises an air-float separation tank (1); the method is characterized in that: a dissolved air pump (2), a dissolved air tank (3) and a recovery tank (4) are also arranged; the air floatation separation tank (1) is respectively provided with a liquid inlet pipeline (7), a water outlet pipeline (8) and an exhaust pipeline (11);
the air floatation separation tank (1) is communicated with the recovery tank (4) through an exhaust pipeline (11);
the dissolved air pump (2) is communicated with the water outlet pipeline (8) through a circulating water pipeline (9);
the dissolved air pump (2) is communicated with the dissolved air tank (3) through a circulating dissolved air water pipeline (12);
the dissolved air tank (3) is communicated with the liquid inlet pipeline (7) through a dissolved air liquid pipeline (13);
the recovery tank (4) is communicated with the circulating water pipeline (9) through a circulating gas pipeline (10);
and the recovery tank (4) is externally communicated with an air supply system (6).
2. The oilfield produced water treatment self-gas circulation air-flotation solid-liquid separation device according to claim 1, characterized in that: a gas pressure regulating device (5) is arranged on the recovery tank (4); one end of the circulating gas pipeline (10) is communicated with the gas pressure regulating device (5), and the other end of the circulating gas pipeline (10) is communicated with the circulating water pipeline (9).
3. The oilfield produced water treatment self-gas circulation air-flotation solid-liquid separation device according to claim 1, characterized in that: and the water outlet pipeline (8), the circulating water pipeline (9), the circulating gas pipeline (10), the exhaust pipeline (11), the circulating dissolved gas water pipeline (12) and the dissolved gas liquid pipeline (13) are all provided with switch valves.
4. The oilfield produced water treatment self-gas circulation air-flotation solid-liquid separation device according to claim 2, characterized in that: and the water outlet pipeline (8), the circulating water pipeline (9), the circulating gas pipeline (10), the exhaust pipeline (11), the circulating dissolved gas water pipeline (12) and the dissolved gas liquid pipeline (13) are respectively provided with a flowmeter and a pressure gauge.
5. The oilfield produced water treatment self-gas circulation air-flotation solid-liquid separation device according to claim 3, characterized in that: an automatic control system is also arranged; the automatic control system is connected with the air supplementing system (6), the switch valve, the flowmeter and the pressure gauge.
6. The oilfield produced water treatment self-gas circulation air-flotation solid-liquid separation device according to claim 1, characterized in that: the gas supplementing system (6) is a nitrogen making device.
7. The oilfield produced water treatment self-gas circulation air-flotation solid-liquid separation device according to claim 1, characterized in that: and a medicament adding pipeline is arranged on the liquid inlet pipeline (7).
8. The oilfield produced water treatment self-gas circulation air-flotation solid-liquid separation device according to claim 7, characterized in that: a mixer is arranged on a liquid inlet pipeline (7) between the medicament adding pipeline and the air flotation separation tank (1).
9. The oilfield produced water treatment self-gas circulation air-flotation solid-liquid separation device according to claim 1, characterized in that: the water outlet pipeline (8) is positioned at the lower side of the air floatation separation tank (1); the horizontal height of the port of the water outlet pipeline (8) on the air flotation separation tank (1) is lower than that of the port of the liquid inlet pipeline (7) on the air flotation separation tank (1).
10. The oilfield produced water treatment self-gas circulation air-flotation solid-liquid separation device according to claim 2, characterized in that: the gas pressure regulating device (5) is positioned at the top of the recovery tank (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121539908.1U CN213895275U (en) | 2021-07-08 | 2021-07-08 | Self-gas circulation air-flotation solid-liquid separation device for oil field produced water treatment |
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| CN202121539908.1U CN213895275U (en) | 2021-07-08 | 2021-07-08 | Self-gas circulation air-flotation solid-liquid separation device for oil field produced water treatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114105243A (en) * | 2022-01-24 | 2022-03-01 | 智慧猫(东营)智能科技有限公司 | Totally-enclosed internal circulation micro-positive pressure air floatation system |
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2021
- 2021-07-08 CN CN202121539908.1U patent/CN213895275U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114105243A (en) * | 2022-01-24 | 2022-03-01 | 智慧猫(东营)智能科技有限公司 | Totally-enclosed internal circulation micro-positive pressure air floatation system |
| CN114105243B (en) * | 2022-01-24 | 2022-04-15 | 智慧猫(东营)智能科技有限公司 | Totally-enclosed internal circulation micro-positive pressure air floatation system |
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