CN112358891B

CN112358891B - Double-layer cavity full-gravity-balance oil-gas-water treatment integrated device

Info

Publication number: CN112358891B
Application number: CN202110033218.7A
Authority: CN
Inventors: 裴红; 王田田; 赵玉红; 魏光辉; 刘俊敏; 李雪艳; 何国霞; 张晓云; 于晶
Original assignee: Suno Technology Co ltd
Current assignee: Suno Technology Co ltd
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2021-04-13
Anticipated expiration: 2041-01-12
Also published as: CN112358891A

Abstract

The invention discloses a double-layer cavity full-gravity-balance oil-gas-water treatment integrated device, and relates to the field of oil-gas-water treatment equipment. Comprises an inclined pipe, an upper tank and a lower tank. The upper tank comprises an oil-water mixing cavity, an emulsified oil cavity and a water collecting cavity; the lower layer tank comprises a sedimentation water purification cavity, a sedimentation water purification cavity and an electric dehydration cavity; the upper tank is located above the lower tank, the inclined tube is located above the upper tank, and the full gravity balance oil-gas-water treatment is realized through the communication flow relation of each cavity between the upper tank and the lower tank in a reasonable layout. Compared with the prior art, the invention has the beneficial effects that: the system has the characteristics of low energy consumption, miniaturization, intellectualization and refinement, can realize that high water-bearing oil can be directly discharged to purify crude oil by a skid, replaces 7 independent processes of pre-water separation, heating, lifting, large tank sedimentation, medicine adding, back flushing and the like in the current combined station, greatly shortens the station flow, reduces the energy consumption of a gathering and transportation system, and provides powerful support for realizing a short flow mode for old oil fields.

Description

Double-layer cavity full-gravity-balance oil-gas-water treatment integrated device

Technical Field

The invention relates to the field of oil-gas-water treatment equipment, in particular to a double-layer cavity full-gravity-balance oil-gas-water treatment integrated device.

Background

With the continuous development of old oil fields, most of the old oil fields enter a high water content development stage, the water content of produced liquid of an oil well is continuously increased, and the water content of part of the oil well reaches more than 95 percent, so that huge pressure is brought to established gathering and transportation systems and equipment, and serious energy consumption is brought. Aiming at the problems of insufficient treatment capacity, high energy consumption for conveying and treating crude oil with high water content and the like of an existing oil and gas gathering and transferring system in an old oil field, a small-sized, intelligent and refined oil and gas water centralized purification treatment sledge is explored, and the key for solving the problems is to realize the on-site water diversion, on-site treatment, on-site external selling of crude oil and on-site reinjection of produced water of a high water content produced liquid in a well site or a metering station.

Disclosure of Invention

The invention provides a double-layer cavity full-gravity balance oil-gas-water treatment integrated device which is characterized by having the characteristics of low energy consumption, miniaturization, intellectualization and refinement, being capable of realizing the direct purification of crude oil from high-water-content oil by a skid, replacing 7 independent processes of pre-water separation, heating, lifting, large tank sedimentation, medicine adding, back flushing and the like in the existing combined station, greatly shortening the station flow, reducing the energy consumption of a gathering and transportation system, and providing powerful support for realizing a short flow mode for old oil fields.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a double-deck chamber full gravity balance oil gas water treatment integrated device which characterized in that: comprises an upper tank and a lower tank; the upper layer tank is positioned above the lower layer tank.

A barrier weir plate is arranged on the upper tank; a separating weir plate is arranged on the blocking weir plate; a liquid inlet cavity is formed between the front end of the upper tank and the barrier weir plate; a flow guide channel is formed among the barrier weir plate, the partition weir plate and the inner wall of the upper tank; and an overflow weir plate and an overflow preventing plate are sequentially arranged in the flow guide channel.

An oil-water mixing cavity is formed between the flow guide channel and the overflow weir plate.

An emulsion oil cavity is formed between the overflow weir plate and the overflow prevention plate.

And a water collecting cavity is formed between the blocking weir plate and the anti-overflow plate.

And gas phase channels are arranged between the upper ends of the overflow weir plate and the overflow prevention plate and the inner wall of the upper end of the upper tank.

The height of the overflow preventing plate is greater than that of the overflow weir plate; the lower ends of the oil-water mixing cavity and the water collecting cavity are communicated through a water collecting pipe.

And a sedimentation water purification cavity, a sedimentation oil purification cavity and an electric dehydration cavity are respectively arranged in the lower tank.

The water collecting cavity is communicated with the sedimentation water purifying cavity through a sedimentation water purifying pipe.

The emulsification oil cavity and the sedimentation oil purification cavity are communicated through a sedimentation oil purification pipe.

And a circulating pipeline is arranged between the sedimentation oil purification cavity and the electric dehydration cavity.

An electric dehydration device is arranged in the electric dehydration cavity.

As optimization, an inclined tube is also arranged; the inclined pipe is of an inclined structure, and an oil-gas-water inlet is formed in the inclined end of the inclined pipe; the upper end of the inclined pipe is communicated with the gas phase inlet above the liquid inlet cavity, and the lower end of the inclined pipe is communicated with the liquid inlet pipe on one side of the liquid inlet cavity.

Preferably, the inclined pipe is positioned above the upper-layer tank.

Preferably, the liquid inlet pipe extends to the lower part of the liquid inlet cavity and is provided with an oil-water distributor.

As optimization, gas phase channels are arranged between the upper ends of the barrier weir plate and the partition weir plate and the inner wall of the upper end of the upper tank; a cyclone separator is arranged above the oil-water mixing cavity; a gas phase outlet is arranged on the upper tank; the inlet of the cyclone separator is communicated with the gas phase outlet, and the outlet of the cyclone separator is communicated with the oil-water mixing cavity.

As optimization, the upper ends of the barrier weir plate and the partition weir plate are in sealed connection with the inner wall of the upper end of the upper-layer tank; a cyclone separator and a gas phase outlet are arranged above the oil-water mixing cavity; the inlet of the cyclone separator is communicated with the gas phase outlet, and the outlet of the cyclone separator is communicated with the oil-water mixing cavity.

As optimization, the inclined pipe comprises an upper straight pipe, a middle inclined pipe and a lower straight pipe which are sequentially connected from top to bottom; the middle inclined tube is of an inclined structure; the upper straight pipe and the lower straight pipe are in vertical structures; the oil-gas water inlet is positioned on one side of the middle inclined pipe; a gas-liquid separation plate is arranged between the upper straight pipe and the middle inclined pipe; and a connecting pipe is arranged between the lower part of the gas-liquid separation plate and the lower straight pipe.

Preferably, the connecting pipe is of a bent structure, the upward folding part of the connecting pipe is of a vertical structure, and the downward folding part of the connecting pipe is parallel to the middle inclined pipe.

As optimization, a first circulation interface and a second circulation interface are arranged above the flow guide channel; a first circulating water pipe and a second circulating water pipe are respectively arranged below the sedimentation oil purification cavity and the electric dehydration cavity; the first circulation interface and the second circulation interface are respectively communicated with the first circulation water pipe and the second circulation water pipe.

Preferably, the sedimentation water purification pipe and/or the sedimentation oil purification pipe are/is provided with a gas-solution device.

Preferably, the gas-liquid dissolving device comprises a gas-liquid dissolving outer pipe and a gas-liquid dissolving inner pipe; the gas-dissolved liquid outer pipe and the gas-dissolved liquid inner pipe are both in annular structures, and the gas-dissolved liquid inner pipe is embedded in the gas-dissolved liquid outer pipe; a plurality of capillary connecting pipes are uniformly distributed between the gas-dissolved liquid outer pipe and the gas-dissolved liquid inner pipe; and the gas-dissolved liquid outer pipe is provided with an injection hole.

Preferably, a corrugated pipe compensator is arranged above the gas-dissolving liquid device.

As optimization, a heating cover is arranged at the upper part in the settling oil purification cavity; one side of the heating cover is provided with a plurality of heating inlets, and the other side of the heating cover is in a reducing structure and communicated with the circulating pipeline.

Preferably, the flow pipeline is positioned between the settling clean oil cavity and the interior of the electric dehydration cavity.

As optimization, a sedimentation oil purification cavity circulation inlet and a sedimentation oil purification cavity circulation outlet are arranged above the sedimentation oil purification cavity; an oil collecting distributor and an electric dehydration cavity circulating inlet are arranged above the electric dehydration cavity; an oil outlet pipeline is connected outside the oil collecting distributor; an external circulation heating pipeline is arranged on the oil outlet pipeline; the external circulation heating pipeline is communicated with a circulation inlet of the sedimentation oil purification cavity; the settling oil purification cavity circulation outlet is communicated with the electric dehydration cavity circulation inlet; the external circulation heating pipeline is provided with a hot oil circulation pump and an oil temperature regulator; the circulating inlet of the electric dehydration cavity is communicated with a circulating pipeline.

Compared with the prior art, the invention has the following beneficial effects: in order to realize in-situ water diversion and in-situ treatment of the produced liquid of the well mouth of the old oil field, in-situ external selling of crude oil and in-situ reinjection of the produced water and reduce the ineffective circulating energy consumption of the produced water of the oil field from the well mouth to a combined station and then to the well mouth, the invention researches a double-layer cavity full-gravity balance oil-gas-water treatment integrated device, and realizes the centralized purification treatment of oil-gas-water by reasonably arranging the functions and the structures of all cavities of the device. The liquid produced by the well mouth passes through the device, the upper layer structure can carry out quick separation of oil, gas and water, and the lower layer can process the emulsified oil into qualified purified oil which is directly sold outside on site; the produced water can be further purified through the device, so that the oil content in the water is reduced, and the subsequent water treatment pressure is relieved; the natural gas is subjected to cyclone separation and purification through the device and is connected to a nearby natural gas system. The device divides water at the front end, has shortened oil gas gathering and transportation flow, has solved the not enough problem of follow-up united station, the station ability that connects, has practiced thrift gathering and transportation system energy consumption simultaneously, reduces gathering and transportation cost, and the produced water also further subsides simultaneously and purifies, improves the entry quality of water that gets into the produced water treatment, helps shortening follow-up produced water treatment flow, alleviates water treatment pressure, reduces water treatment energy consumption.

The utility model provides a double-deck chamber full gravity balance oil gas water treatment integrated device has ten big technical characteristics, specifically as follows:

(1) the integrated treatment efficiency is high, and the gas-liquid separation, the oil-water separation, the buffering and the thermochemical pressure sedimentation, the alternating current and direct current dehydration, the self-flushing sand, the medicament filling and the improvement of the oil-containing indexes of the sewage are all solved by a sledge.

(2) The full gravity flow is realized, the internal structure of the system is ingenious, the flow treatment can be fully carried out according to the rule of gravity flow under lower pressure, and the energy consumption is low.

(3) And the whole system runs in a unified pressure system, and the pressure loss of the system is extremely small.

(4) The long flow passage technology for oil-water separation prolongs the oil-water separation flow passage and increases the separation time by optimizing the structural design, and in addition, the application of the upper layer cavity technology and the lower layer cavity technology enables the emulsion to be further settled and separated.

(5) The operation is simple, all links of the equipment are mostly controlled by reliable mechanical actuating mechanisms, and the process operation is simple, reliable and easy to maintain.

(6) The function combination is flexible, and the system can be as follows: can produce qualified purified oil products and also can produce emulsified oil semi-finished products; the oily sewage can be separated conventionally, and can be treated according to the standard of improving the oil content of the sewage; the medicine can be added by injecting the medicine according to the general entrance, and the medicine can be injected according to each key link; not only can adopt warm water on the station to wash sand, but also can utilize self-produced sewage to wash sand and other flexible and various operations.

(7) The energy-saving measures are perfect, and due to the high integration degree of the system, the energy loss of pressure, temperature and the like between equipment caused by non-integration is avoided. Meanwhile, the local stepless temperature control treatment is carried out according to the fluid temperature required by the electric dehydration.

(8) The reliability is high, and the design of the full gravity and the full balance of the system effectively avoids the tripping outage or explosion risk caused by the easy gas separation at the top in the electric dehydration cavity.

(9) The system self-cleans and desands, and the system can utilize the sewage separated by the system to carry out sand washing operation on the sand-containing parts at the bottom of each cavity.

(10) The system effluent quality is guaranteed, and unqualified purified oil and emulsified oil accumulated in the upper-layer water cavity and the lower-layer water cavity for a long time can be pumped to the main inlet of the system for retreatment by using a circulating pump in equipment debugging or normal operation at the initial stage of system operation.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a top view of the upper tank of the present invention.

Fig. 3 is a schematic structural view of the upper tank of the present invention after the weir plate is partitioned.

Fig. 4 is a schematic structural diagram of embodiment 2 of the present invention.

FIG. 5 is a schematic structural view of the down tube of the present invention.

FIG. 6 is a schematic structural view of the gas dissolving and dispensing device of the present invention.

Fig. 7 is a top view of the apparatus for dissolving liquid and gas in accordance with the present invention.

Wherein, the upper layer tank 1, the lower layer tank 2, the barrier weir plate 3, the separation weir plate 4, the overflow weir plate 5, the overflow prevention plate 6, the liquid inlet cavity 7, the diversion channel 8, the oil-water mixing cavity 9, the emulsification oil cavity 10, the water collecting cavity 11, the water collecting pipe 12, the liquid inlet pipe 13, the oil-water distributor 14, the gas phase channel 15, the sedimentation water purifying pipe 16, the sedimentation water purifying pipe 17, the sedimentation water purifying cavity 18, the sedimentation water purifying cavity 19, the electric dehydration cavity 20, the first circulating water pipe 21, the second circulating water pipe 22, the first circulating interface 23, the second circulating interface 24, the heating mantle 25, the heating inlet 26, the heater 27, the circulating pipeline 28, the electric dehydration device 29, the inclined pipe 30, the gas phase inlet 31, the gas phase outlet 32, the cyclone separator 33, the middle inclined pipe 34, the upper straight pipe 35, the lower straight pipe 36, the connecting pipe 37, the gas-liquid separation plate 38, the liquid phase guide plate 39, the oil collection distributor 40, the oil outlet, The device comprises a hot oil circulating pump 43, an oil temperature regulator 44, a settling clean oil cavity circulating inlet 45, a settling clean oil cavity circulating outlet 46, an electric dehydration cavity circulating inlet 47, a gas-liquid dissolved outer pipe 48, a gas-liquid dissolved inner pipe 49, a capillary connecting pipe 50, an injection hole 51 and a corrugated pipe compensator 52.

Detailed Description

Example 1

A double-layer cavity full-gravity balance oil-gas-water treatment integrated device comprises an upper layer tank 1 and a lower layer tank 2; the upper layer tank 1 is positioned above the lower layer tank 2.

A barrier weir plate 3 is arranged on the upper tank 1; the barrier weir plate 3 is provided with a partition weir plate 4; a liquid inlet cavity 7 is formed between the front end of the upper tank 1 and the barrier weir plate 3; a flow guide channel 8 is formed between the barrier weir plate 3, the partition weir plate 4 and the inner wall of the upper tank 1; and an overflow weir plate 5 and an overflow prevention plate 6 are sequentially arranged in the flow guide channel 8.

An oil-water mixing cavity 9 is formed between the flow guide channel 8 and the overflow weir plate 5.

An emulsion oil cavity 10 is formed between the overflow weir plate 5 and the overflow prevention plate 6.

A water collecting cavity 11 is formed between the blocking weir plate 3 and the anti-overflow plate 6.

And gas phase channels 15 are arranged between the upper ends of the overflow weir plate 5 and the overflow prevention plate 6 and the inner wall of the upper end of the upper tank 1.

The height of the overflow preventing plate 6 is greater than that of the overflow weir plate 5; the lower ends of the oil-water mixing cavity 9 and the water collecting cavity 11 are communicated through a water collecting pipe 12.

And a sedimentation water purification cavity 18, a sedimentation water purification cavity 19 and an electric dehydration cavity 20 are respectively arranged in the lower-layer tank 2.

The water collecting cavity 11 is communicated with the sedimentation water purifying cavity 18 through a sedimentation water purifying pipe 16.

The emulsified oil chamber 10 is communicated with the sedimentation oil purification chamber 19 through a sedimentation oil purification pipe 17.

A circulating pipeline 28 is arranged between the sedimentation clean oil chamber 19 and the electric dehydration chamber 20.

An electric dehydration device 29 is arranged in the electric dehydration cavity 20.

An inclined tube 30 is also arranged; the inclined pipe 30 is of an inclined structure, and an oil-gas-water inlet is formed in the inclined end of the inclined pipe; the upper end of the inclined tube 30 is communicated with a gas phase inlet 31 above the liquid inlet cavity 7, and the lower end of the inclined tube 30 is communicated with a liquid inlet tube 13 at one side of the liquid inlet cavity 7.

The inclined tube 30 is located above the upper tank 1.

The liquid inlet pipe 13 extends to the lower part of the liquid inlet chamber 7 and is provided with an oil-water distributor 14.

Gas phase channels 15 are arranged between the upper ends of the barrier weir plates 3 and the separating weir plates 4 and the inner wall of the upper end of the upper tank 1; a cyclone separator 33 is arranged above the oil-water mixing cavity 9; the upper layer tank 1 is provided with a gas phase outlet 32; the inlet of the cyclone separator 33 is communicated with the gas phase outlet 32, and the outlet of the cyclone separator 33 is communicated with the oil-water mixing chamber 9.

The inclined tube 30 comprises an upper straight tube 35, a middle inclined tube 34 and a lower straight tube 36 which are sequentially connected from top to bottom; the middle inclined tube 34 is of an inclined structure; the upper straight pipe 35 and the lower straight pipe 36 are vertical structures; the oil-gas-water inlet is positioned on one side of the middle inclined pipe 34; a gas-liquid separation plate 38 is arranged between the upper straight pipe 35 and the middle inclined pipe 34; a connecting pipe 37 is provided between the lower portion of the gas-liquid separation plate 38 and the lower straight pipe 36.

The connecting tube 37 is of a bent structure, the folded part of the connecting tube 37 is of a vertical structure, and the folded part of the connecting tube 37 is parallel to the middle inclined tube 34.

A liquid phase guide plate 39 is arranged at the joint of the upper end of the connecting pipe 37 and the middle inclined pipe 34.

A first circulation interface 23 and a second circulation interface 24 are arranged above the flow guide channel 8; a first circulating water pipe 21 and a second circulating water pipe 22 are respectively arranged below the sedimentation oil purification chamber 19 and the electric dehydration chamber 20; the first circulation connector 23 and the second circulation connector 24 are respectively communicated with the first circulation water pipe 21 and the second circulation water pipe 22.

And a solution-gas liquid device is arranged on the sedimentation water purification pipe 16 and/or the sedimentation oil purification pipe 17.

The gas-liquid dissolving device comprises a gas-liquid dissolving outer pipe 48 and a gas-liquid dissolving inner pipe 49; the gas-dissolved liquid outer pipe 48 and the gas-dissolved liquid inner pipe 49 are both in an annular structure, and the gas-dissolved liquid inner pipe 49 is embedded in the gas-dissolved liquid outer pipe 48; a plurality of capillary connecting pipes 50 are uniformly distributed between the gas-dissolved liquid outer pipe 48 and the gas-dissolved liquid inner pipe 49; the gas-dissolved liquid outer pipe 48 is provided with an injection hole 51.

A bellows compensator 52 is arranged above the gas-liquid dissolving device.

A heating cover 25 is arranged at the upper part in the settling oil purification chamber 19; a plurality of heaters 27 are arranged in the heating cover 25; one side of the heating cover 25 is provided with a plurality of heating inlets 26, and the other side of the heating cover 25 is in a reducing structure and communicated with a circulating pipeline 28.

The flow conduit 28 is located between the settling clean oil chamber 19 and the interior of the electro-dewatering chamber 20.

The working principle is as follows:

as shown in figure 1, oil gas liquid produced in the wellhead enters the inclined pipe 30 through the middle inclined pipe 34, and through the inclined design, the oil gas liquid separation area is increased, the fluctuation is reduced, and the separation efficiency is improved. The gas obtains primary filtration through the isolation of gas-liquid separation board 38, and inside the gas phase import 31 gets into upper tank 1, through blockking that the gas phase passageway 15 of weir plate 3, partition weir plate 4, overflow weir plate 5 and anti-overflow board 6 top flows to gas phase export 32 department, through the flow in upper tank 1 for the liquid that contains in the gas condenses the nature and drips, with the liquid content in the reduction gas. The gas is discharged through the gas phase outlet 32, enters the cyclone 33, and is further subjected to gas-liquid separation by the cyclone 33. The liquid falls back into the oil-water mixing chamber 9 below the cyclone 33.

As shown in FIG. 5, the liquid in the inclined tube 30 enters the liquid inlet tube 13 through the lower straight tube 36 and is uniformly distributed in the liquid inlet chamber 7 through the oil-water distributor 14. In this case, the liquid separated by the gas-liquid separation plate 38 is returned to the lower straight pipe 36 through the connection pipe 37.

As shown in figure 2, liquid enters the liquid inlet cavity 7 through the isolation diversion of the blocking weir plate 3 and the separating weir plate 4, enters the oil-water mixing cavity 9 through the diversion channel 8, the separating weir plate 4 separates the diversion channel 8 into a U-shaped structure, the oil-water treatment flow is increased, and the multi-stage coalescence plates can be arranged in the diversion channel 8 according to actual conditions, so that the oil-water separation effect is further improved. Because the density of oil meets the end, consequently can float in the surface of water top, the oil reservoir passes through overflow weir plate 5 and gets into in the emulsification oil chamber 10, because oil-water mixing chamber 9 and the 11 lower extreme of collecting chamber pass through collector pipe 12 and connect, consequently both are the design of U-shaped tubular structure, consequently, the water in the oil-water mixing chamber 9 can flow to collecting chamber 11 in, the liquid level of oil-water mixing chamber 9 and collecting chamber 11 can keep unanimous simultaneously, because the oil reservoir floats in the water layer top, consequently, consider the tension effect of liquid level, the liquid level of oil-water mixing chamber 9 can be a little higher than the liquid level of collecting chamber 11, consequently, in order to avoid the water overflow in the collecting chamber 11 to the emulsification oil chamber 10 in, consequently in actual, the height of anti-overflow board 6 will be higher than overflow weir plate 5's.

The oil layer is discharged into the sedimentation oil purification cavity 19 through the sedimentation oil purification pipe 17, a gas dissolving and dissolving device is arranged on the sedimentation oil purification pipe 17, and the oil-water separation effect is further improved through injecting a bubble-shaped demulsifier.

The liquid in the settling oil purification chamber 19 is further separated by settling, so that the upper layer floating oil in the settling oil purification chamber 19 enters the heating cover 25 under the effect of gravity pushing, the oil-water separation of the next flow is improved by heating, the heated oil layer is guided to the bottom of the electric dehydration chamber 20 under the action of the circulating pipeline 28, and the oil-water separation is further realized through the electric dehydration device 29. The purified oil formed after the separation is conducted away via an oil collector 40.

In the process, the water separated from the settling clean oil chamber 19 and the electric dehydration chamber 20 is injected back into the diversion channel 8 through the first circulation interface 23 and the second circulation interface 24 for next circulation separation and filtration.

Finally, the collected water is collected by the water collecting cavity 11 and is guided into the sedimentation water purifying cavity 18 through the sedimentation water purifying pipe 16, and a solution gas-liquid device can be arranged on the sedimentation water purifying pipe 16 in the process to ensure the water purifying effect after being discharged.

In the process, all power is derived from the pressure of the wellhead and the gravity of the liquid, so that the circulating oil-water separation is realized. The internal circulation heating is adopted between the sedimentation oil purification cavity 19 and the electric dehydration cavity 20, so that the energy consumption is reduced, and meanwhile, only the upper layer of floating oil is heated, so that the problem of overhigh energy consumption caused by heating the whole cavity is avoided.

Example 2

Example 2 differs from example 1 specifically in that:

the upper ends of the barrier weir plate 3 and the partition weir plate 4 are hermetically connected with the inner wall of the upper end of the upper tank 1; a cyclone separator 33 and a gas phase outlet 32 are arranged above the oil-water mixing cavity 9; the inlet of the cyclone separator 33 is communicated with the gas phase outlet 32, and the outlet of the cyclone separator 33 is communicated with the oil-water mixing chamber 9.

Through this design for the circulation passageway of gaseous phase passes through water conservancy diversion passageway 8, and reentrant cyclone 33 is in, has prevented that the liquid that contains in the gas from dripping into in emulsion oil pocket 10 and the water collecting cavity 11.

Meanwhile, the internal circulation heating originally adopted by the sedimentation oil purification cavity 19 and the electric dehydration cavity 20 is changed into external circulation heating, and the maintenance is more convenient and simpler by adopting the external circulation heating. Specifically, a sedimentation clean oil cavity circulation inlet 45 and a sedimentation clean oil cavity circulation outlet 46 are arranged above the sedimentation clean oil cavity 19; an oil collecting distributor 40 and an electric dehydration cavity circulating inlet 47 are arranged above the electric dehydration cavity 20; an oil outlet pipeline 41 is connected outside the oil collecting distributor 40; an external circulation heating pipeline 42 is arranged on the oil outlet pipeline 41; the external circulation heating pipeline 42 is communicated with a circulation inlet 45 of the sedimentation oil purification cavity; the settling oil purification cavity circulating outlet 46 is communicated with an electric dehydration cavity circulating inlet 47; the external circulation heating pipeline 42 is provided with a hot oil circulation pump 43 and an oil temperature regulator 44; the circulation inlet 47 of the electric dehydration cavity is communicated with the circulation pipeline 28.

In the above structural design, the internal circulation heating and the external circulation heating of the settling clean oil chamber 19 and the electric dehydration chamber 20 can be simultaneously reserved.

Claims

1. The utility model provides a double-deck chamber full gravity balance oil gas water treatment integrated device which characterized in that: comprises an upper layer tank (1) and a lower layer tank (2); the upper layer tank (1) is positioned above the lower layer tank (2);

a barrier weir plate (3) is arranged on the upper tank (1); a separating weir plate (4) is arranged on the barrier weir plate (3); a liquid inlet cavity (7) is formed between the front end of the upper tank (1) and the barrier weir plate (3); a flow guide channel (8) is formed between the barrier weir plate (3), the partition weir plate (4) and the inner wall of the upper tank (1); an overflow weir plate (5) and an overflow prevention plate (6) are sequentially arranged in the flow guide channel (8);

an oil-water mixing cavity (9) is formed between the flow guide channel (8) and the overflow weir plate (5);

an emulsion oil cavity (10) is formed between the overflow weir plate (5) and the overflow preventing plate (6);

a water collecting cavity (11) is formed between the blocking weir plate (3) and the anti-overflow plate (6);

gas phase channels (15) are arranged between the upper ends of the overflow weir plate (5) and the overflow prevention plate (6) and the inner wall of the upper end of the upper tank (1);

the height of the overflow preventing plate (6) is greater than that of the overflow weir plate (5); the lower ends of the oil-water mixing cavity (9) and the water collecting cavity (11) are communicated through a water collecting pipe (12);

a sedimentation water purification cavity (18), a sedimentation water purification cavity (19) and an electric dehydration cavity (20) are respectively arranged in the lower layer tank (2);

the water collecting cavity (11) is communicated with the sedimentation water purifying cavity (18) through a sedimentation water purifying pipe (16);

the emulsified oil cavity (10) is communicated with the sedimentation oil purification cavity (19) through a sedimentation oil purification pipe (17);

a circulating pipeline (28) is arranged between the sedimentation oil purification chamber (19) and the electric dehydration chamber (20);

an electric dehydration device (29) is arranged in the electric dehydration cavity (20).

2. The integrated device for double-layer cavity full-gravity balance oil-gas-water treatment according to claim 1, which is characterized in that: an inclined tube (30) is also arranged; the inclined pipe (30) is of an inclined structure, and an oil-gas-water inlet is formed in the inclined end of the inclined pipe; the upper end of the inclined pipe (30) is communicated with a gas phase inlet (31) above the liquid inlet cavity (7), and the lower end of the inclined pipe (30) is communicated with a liquid inlet pipe (13) on one side of the liquid inlet cavity (7).

3. The integrated device for double-layer cavity full-gravity balance oil-gas-water treatment according to claim 2, characterized in that: the inclined pipe (30) is positioned above the upper-layer tank (1).

4. The integrated device for double-layer cavity full-gravity balance oil-gas-water treatment according to claim 2, characterized in that: the liquid inlet pipe (13) extends to the lower part of the liquid inlet cavity (7) and is provided with an oil-water distributor (14).

5. The integrated device for double-layer cavity full-gravity balance oil-gas-water treatment according to claim 2, characterized in that: gas phase channels (15) are arranged between the upper ends of the barrier weir plates (3) and the partition weir plates (4) and the inner wall of the upper end of the upper tank (1); a cyclone separator (33) is arranged above the oil-water mixing cavity (9); a gas phase outlet (32) is arranged on the upper layer tank (1); the inlet of the cyclone separator (33) is communicated with the gas phase outlet (32), and the outlet of the cyclone separator (33) is communicated with the oil-water mixing cavity (9).

6. The integrated device for double-layer cavity full-gravity balance oil-gas-water treatment according to claim 2, characterized in that: the upper ends of the barrier weir plate (3) and the partition weir plate (4) are hermetically connected with the inner wall of the upper end of the upper tank (1); a cyclone separator (33) and a gas phase outlet (32) are arranged above the oil-water mixing cavity (9); the inlet of the cyclone separator (33) is communicated with the gas phase outlet (32), and the outlet of the cyclone separator (33) is communicated with the oil-water mixing cavity (9).

7. The integrated device for double-layer cavity full-gravity balance oil-gas-water treatment according to claim 2, characterized in that: the inclined tube (30) comprises an upper straight tube (35), a middle inclined tube (34) and a lower straight tube (36) which are sequentially connected from top to bottom; the middle inclined tube (34) is of an inclined structure; the upper straight pipe (35) and the lower straight pipe (36) are of a vertical structure; the oil-gas water inlet is positioned on one side of the middle inclined pipe (34); a gas-liquid separation plate (38) is arranged between the upper straight pipe (35) and the middle inclined pipe (34); and a connecting pipe (37) is arranged between the lower part of the gas-liquid separation plate (38) and the lower straight pipe (36).

8. The integrated device for double-layer cavity full-gravity balance oil-gas-water treatment according to claim 7, characterized in that: the connecting pipe (37) is of a bent structure, the upper folding part of the connecting pipe (37) is of a vertical structure, and the lower folding part of the connecting pipe (37) is parallel to the middle inclined pipe (34).

9. The integrated device for double-layer cavity full-gravity balance oil-gas-water treatment according to claim 1, which is characterized in that: a first circulation interface (23) and a second circulation interface (24) are arranged above the flow guide channel (8); a first circulating water pipe (21) and a second circulating water pipe (22) are respectively arranged below the sedimentation oil purification chamber (19) and the electric dehydration chamber (20); the first circulation connector (23) and the second circulation connector (24) are respectively communicated with the first circulation water pipe (21) and the second circulation water pipe (22).

10. The integrated device for double-layer cavity full-gravity balance oil-gas-water treatment according to claim 1, which is characterized in that: and the settling water purification pipe (16) and/or the settling oil purification pipe (17) are/is provided with a gas-liquid dissolving device.

11. The integrated double-cavity full-gravity-balance oil-gas-water treatment device according to claim 10, which is characterized in that: the gas-liquid dissolving device comprises a gas-liquid dissolving outer pipe (48) and a gas-liquid dissolving inner pipe (49); the gas-dissolved liquid outer pipe (48) and the gas-dissolved liquid inner pipe (49) are both in annular structures, and the gas-dissolved liquid inner pipe (49) is embedded in the gas-dissolved liquid outer pipe (48); a plurality of capillary connecting pipes (50) are uniformly distributed between the gas-dissolved liquid outer pipe (48) and the gas-dissolved liquid inner pipe (49); and an injection hole (51) is formed in the gas-dissolved liquid outer pipe (48).

12. The integrated double-cavity full-gravity-balance oil-gas-water treatment device according to claim 10, which is characterized in that: a corrugated pipe compensator (52) is arranged above the gas-liquid dissolving device.

13. The integrated device for double-layer cavity full-gravity balance oil-gas-water treatment according to claim 1, which is characterized in that: a heating cover (25) is arranged at the upper part in the sedimentation oil purification chamber (19); one side of the heating cover (25) is provided with a plurality of heating inlets (26), and the other side of the heating cover (25) is in a reducing structure and is communicated with a circulating pipeline (28).

14. The integrated double-cavity full-gravity-balance oil-gas-water treatment device according to claim 1 or 13, which is characterized in that: a sedimentation clean oil cavity circulating inlet (45) and a sedimentation clean oil cavity circulating outlet (46) are arranged above the sedimentation clean oil cavity (19); an oil collecting distributor (40) and an electric dehydration cavity circulating inlet (47) are arranged above the electric dehydration cavity (20); an oil outlet pipeline (41) is connected outside the oil collecting distributor (40); an external circulation heating pipeline (42) is arranged on the oil outlet pipeline (41); the external circulation heating pipeline (42) is communicated with a sedimentation clean oil cavity circulation inlet (45); the sedimentation clean oil cavity circulating outlet (46) is communicated with the electric dehydration cavity circulating inlet (47); the external circulation heating pipeline (42) is provided with a hot oil circulation pump (43) and an oil temperature regulator (44); the circulation inlet (47) of the electric dehydration cavity is communicated with a circulation pipeline (28).