CN115010203A - Oil-containing sewage gas flotation and extraction treatment system and method in oil-gas-water separation equipment based on partial gasification of low-boiling-point liquid - Google Patents
Oil-containing sewage gas flotation and extraction treatment system and method in oil-gas-water separation equipment based on partial gasification of low-boiling-point liquid Download PDFInfo
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- CN115010203A CN115010203A CN202210767828.4A CN202210767828A CN115010203A CN 115010203 A CN115010203 A CN 115010203A CN 202210767828 A CN202210767828 A CN 202210767828A CN 115010203 A CN115010203 A CN 115010203A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/26—Treatment of water, waste water, or sewage by extraction
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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Abstract
The invention belongs to the technical field of oily sewage treatment, and provides an oily sewage gas flotation and extraction treatment system and method in oil-gas-water separation equipment based on partial gasification of low-boiling-point liquid, aiming at solving the problems that the oil concentration of a water outlet in the existing oil-gas-water separation equipment is too high, and the traditional sewage treatment method cannot treat dissolved hydrocarbons in water. The method comprises the steps of shearing and mixing water and a proper amount of low-boiling-point liquid at high strength to form micron-sized emulsified liquid drops, then utilizing micro bubbles generated by partial gasification of the low-boiling-point liquid to realize air floatation of oily sewage in a water layer in a three-phase separator, so that dissolved organic matters in the sewage are more easily extracted by the micro drops prepared by the low-boiling-point liquid, and utilizing the micro bubbles prepared by partial gasification of the low-boiling-point liquid to perform air floatation of the oily sewage, thereby thoroughly solving the problems of high energy consumption and low treatment capacity caused by high reflux ratio of the traditional air floatation sewage treatment equipment.
Description
Technical Field
The invention relates to the technical field of oily sewage treatment, in particular to a method for treating oil-containing sewage by gas flotation and extraction of dissolved oil in oil-containing sewage based on partial gasification of low-boiling-point liquid.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Produced water is a major byproduct of the crude oil and natural gas production process. The comprehensive water content in the oil field produced liquid is more than 90% along with the oil field entering the later development stage, and the produced water amount needing to be treated is increased continuously. The oil in the oily sewage exists in the form of suspension oil, dispersed oil, emulsified oil, dissolved oil, and dissolved or undissolved organic substances, such as organic acids, polycyclic aromatic hydrocarbons, phenols, petroleum hydrocarbons, etc. The traditional oil-water separation and sewage treatment method is effective in treating suspended oil, dispersed oil and emulsified oil, but has no effect on treating dissolved oil, and the treatment effect on highly emulsified oil is also deteriorated.
The air flotation is to capture fine oil drops in the produced water through micro bubbles to improve the sewage treatment effect. The basic principle of the technology is that tiny oil drops in water are adhered to micro bubbles to form oil drops with small density and large volume-bubble aggregates, so that the floating is easier and the sewage treatment effect is improved. The common air flotation equipment comprises a flotation tank, a flotation column, a flotation machine, a rotational flow air flotation device and the like, and the technical core is how to generate fine and dense micro bubbles, and the energy consumption for generating the bubbles is low. The common microbubble generating methods at present comprise a pressurized dissolved air floatation method and a dissolved air pump dissolved air floatation method, wherein the pressurized dissolved air floatation method and the dissolved air pump dissolved air floatation method both need to dissolve air in partial sewage or all sewage, and the energy consumption in the air dissolving process is huge.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a method for treating oily sewage in oil-gas-water separation equipment based on partial gasification of low-boiling-point liquid, which utilizes extraction and flotation to treat dissolved and dispersed hydrocarbons in produced water in a separator and reduce the oil concentration of a water outlet of the separator.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect of the present invention, there is provided an oil-containing sewage gas flotation and extraction treatment system in an oil-gas-water separation device based on partial gasification of low boiling point liquid, comprising: a three-phase separator 2, a low boiling point liquid storage tank 4 and a venturi tube 5; the top of the three-phase separator 2 is provided with an exhaust port 23, the upper part is provided with an inlet 24, and the bottom is provided with a bottom inlet 26, a water outlet 21 and an oil outlet 22; the production well come the liquid pipeline with the entry 24 of three-phase separator links to each other, the outlet conduit of three-phase separator 2 and low boiling point liquid storage tank 4 joins at venturi 5, be provided with valve 10 on the venturi 5 outlet conduit to join with the liquid pipeline that comes of production well, venturi 5 outlet conduit still links to each other with three-phase separator bottom entry 26.
The invention utilizes the micro bubbles prepared by gasifying the low-boiling-point liquid part to carry out the flotation of the oily sewage gas, and the unevaporated liquid drops extract the dissolved organic matters in the sewage, thereby thoroughly solving the problems that the traditional air flotation system has high energy consumption for dissolving the gas and can not treat the dissolved oil in the sewage and having wide application prospect.
The invention discloses an oil-containing sewage gas flotation and extraction treatment method in oil-gas-water separation equipment based on partial gasification of low-boiling-point liquid, which comprises the following steps:
part of the treated water in the water outlet 21 of the three-phase separator enters the Venturi tube 9 through pressurization, negative pressure is formed at the throat of the Venturi tube 9, and low-boiling-point liquid is sucked into the Venturi tube 9 and then mixed with the treated water to form highly dispersed low-boiling-point liquid-water emulsion;
the highly dispersed low boiling point liquid-water emulsion is throttled and depressurized, mixed with the incoming flow of the production well, and enters the three-phase separator 2 from the inlet 24 of the three-phase separator;
or, the highly dispersed low boiling point liquid-water emulsion is throttled and depressurized and then injected into the water layer at the bottom of the three-phase separator 2 through the bottom inlet 26 of the three-phase separator;
the low boiling point liquid drops injected into the three-phase separator 2 are partially gasified to generate micro bubbles; the unevaporated low boiling point liquid drops adsorb dissolved hydrocarbons in the sewage;
the micro bubbles rise to a gas-liquid interface, enter a gas-phase space in the three-phase separator 2, are converged with the separated associated gas, and are discharged from the gas outlet 23; the liquid drops with low boiling point which are not gasified enter the oil layer of the three-phase separator and are discharged from the oil outlet 22; the treated sewage is discharged from the drain port 21.
The invention adopts the basic principle that the air flotation of the oily sewage in the water layer in the three-phase separator is realized by utilizing micro-bubbles generated by partial gasification of the low-boiling-point liquid. By utilizing the principle of similarity and intermiscibility of the homologues, the liquid drops of the hydrocarbon homologues extract tiny oil drops in the sewage to form large flocs to absorb dissolved hydrocarbons in the water; the formation of large flocs greatly increases the collision probability of bubbles and flocs, so that the flotation effect is obviously improved.
The invention has the advantages of
(1) The invention has simple flow and compact structure, realizes the air flotation and the recovery of the flotation gas in the three-phase separator, prevents the volatile organic compounds from escaping, and has high popularization and application values.
(2) According to the invention, oil drops and air bubbles are prepared in the three-phase separation by using part of plans of low-boiling-point condensate liquid, and emulsified oil drops and dissolved hydrocarbon are extracted and floated in the three-phase separator by using the similarity intermiscibility principle of condensate liquid drops and oil drops in oil-containing sewage and the Stokes' law principle of flotation, so that the integrated treatment device not only saves the floor area of equipment and greatly improves the oil-water separation efficiency of the three-phase separator, but also can be directly recovered at an air outlet of the three-phase separation after the low-boiling-point condensate liquid is vaporized, and the loss is avoided. If the current flotation tank does not have the function of recovering the volatile organic compounds.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a flow chart of the dispersion and emulsification process using Venturi tube according to the present invention, wherein the process principle is to mix a certain proportion of treated water as a power fluid with a low boiling point liquid, and to disperse and emulsify the low boiling point liquid by the jet shearing action of Venturi tube. The device comprises a valve a, a valve 2, an oil-gas-water three-phase separator 21, a three-phase separator water outlet 22, a three-phase separator oil outlet 23, a three-phase separator exhaust port 24, a three-phase separator inlet 25, an oil separation plate 26, a three-phase separator bottom inlet 3, a valve b, a valve 4, a valve c, a valve d, a valve 6, a low boiling point liquid storage tank 7, a valve e, a valve 8, a treated water reflux pump 9, a venturi tube 10, a valve f, a valve 11 and a valve g.
FIG. 2 is a flow chart of the dispersion and emulsification process in a low boiling point liquid tank, the process principle is that in the low boiling point liquid tank, a certain proportion of water and low boiling point liquid are stirred and sheared at high speed to prepare low boiling point liquid drops, and the low boiling point liquid drops are decompressed and released by a decompression valve after being pressurized by a pump to realize the partial gasification of the low boiling point liquid drops. Wherein. The device comprises a valve a, a valve 2, an oil-gas-water three-phase separator 21, a three-phase separator water outlet 22, a three-phase separator oil outlet 23, a three-phase separator exhaust port 24, a three-phase separator inlet 25, an oil separation plate 26, a three-phase separator bottom inlet 3, a valve b, a valve 4, a valve c, a valve d, a valve 6, a low boiling point liquid storage tank 7, a high-speed stirrer 8, a pump 9, a valve e, a valve 10, a valve f, a valve 11 and a valve g.
FIG. 3 is a flow chart of the dispersion and emulsification process using an atomizing nozzle, and the process principle is to realize dispersion and emulsification of low-boiling-point liquid by using the atomizing function of the atomizing nozzle. Wherein. The device comprises a valve a, a valve 2, an oil-gas-water three-phase separator 21, a three-phase separator water discharge port 22, a three-phase separator oil discharge port 23, a three-phase separator exhaust port 24, a three-phase separator inlet 25, an oil separation plate 26, a three-phase separator bottom inlet 3, a valve b, a valve 4, a valve c, a valve d, a valve 6, a low boiling point liquid storage tank 7, a valve e, a valve 8, a pump 9, an atomizing nozzle a, a valve 10, a valve f, a valve 11, a valve g, a valve 12 and an atomizing nozzle b.
FIG. 4 is a phase diagram of the components of a low boiling liquid. In the oily sewage treatment process technology, the operation working condition of the three-phase separator is in a gas-liquid two-phase region in a low-boiling-point liquid phase diagram, so that partial gasification of low-boiling-point liquid is facilitated, low-boiling-point liquid drops and micro-bubbles are prepared, and the stability of the bubbles and the liquid drops is kept.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
A method for treating the oily sewage in oil-gas-water separator based on the partial gasification of low-boiling-point liquid features that the extraction and floatation are used to treat the dissolved and dispersed hydrocarbons in the water extracted from separator and reduce the oil concentration in water outlet. As shown in fig. 1, part of the treated water in the water outlet 21 of the three-phase separator is pressurized by a pump 8 and enters a venturi tube 9, negative pressure is formed at the throat of the venturi tube 9, low boiling point liquid in a storage tank 6 is sucked and then mixed with the treated water to form highly dispersed low boiling point liquid-water emulsion, the highly dispersed low boiling point liquid-water emulsion enters an inlet pipeline of the three-phase separator 2 through a valve 10, is mixed with production well incoming liquid, and enters the three-phase separator 2 from an inlet 24 of the three-phase separator; or from the lower inlet 26 of the three-phase separator through valve 11 into the bottom aqueous layer of the three-phase separator. The gasification of the low-boiling-point liquid part is realized through jet mixing and pressure reduction, micro-droplets and micro-bubbles are generated, the flotation of dispersed oil droplet gas and the extraction of dissolved oil in the separator are completed, and oil gas and water in the separator enter a downstream treatment process through a water outlet 21, an oil outlet 22 and an exhaust port 23 respectively.
There are three methods for dispersing and emulsifying the low boiling point liquid. As shown in figure 1, the low boiling point liquid is pumped by the speed and pressure increase of the throat of the Venturi tube 9 and is mixed, sheared and emulsified by the Venturi tube; as shown in fig. 2, a storage tank 6 is filled with a low boiling point liquid and a certain proportion of treated water, and is subjected to high-speed shearing, mixing and emulsification by a stirrer 7; as shown in fig. 3, the low boiling point liquid in the tank 6 is pressurized by a pump 8 or enters into an atomizing nozzle 12 in an inlet pipeline of the three-phase separator 2 through a valve 10 for jet mixing and emulsification; or the mixture enters into an atomizing nozzle 9 in the bottom water layer of the three-phase separator 2 through a valve 11 to be mixed and emulsified.
The highly dispersed low-boiling-point liquid-water emulsion enters the three-phase separator 2 through the inlet 24 or enters the water layer at the bottom of the three-phase separator 2 through the inlet 26, and is partially gasified after pressure reduction and temperature rise to generate micro-droplets and micro-bubbles, so that the extraction of dissolved oil and the air flotation of dispersed oil in sewage are realized. The buoyancy rising bubbles enter the gas phase space of the three-phase separator 2, join with the separated associated gas, enter the downstream associated gas treatment process through the exhaust port 23, and avoid the volatilization and the dissipation of organic matters to the environment.
The component proportion of the low boiling point liquid ensures that the operation temperature and the pressure of the three-phase separator are positioned in a gas-liquid two-phase area in a low boiling point liquid phase diagram. The liquid generally comprises the following components in percentage by weight: c2 (30-45%), C3 (30-45%), C4 (5-20%), C5 (5-15%) and C6+ (< 5%).
In some embodiments, the low boiling point liquid is a natural gas condensate (low boiling point condensate).
There are two ways in which the low boiling droplets and bubbles enter the three-phase separator 2. As shown in fig. 1 to 3, the prepared low-boiling-point liquid drops are mixed with the well incoming liquid and enter from an inlet 24 of the three-phase separator; entering through the bottom inlet 26 of the three-phase separator.
The invention specifically comprises the following steps:
Step 2, after the highly dispersed low-boiling-point liquid-water emulsion from the Venturi tube 9 is throttled and depressurized by a valve 10, the highly dispersed low-boiling-point liquid-water emulsion is mixed with the incoming flow of a production well and enters the three-phase separator 2 from an inlet 24 of the three-phase separator; or after throttling and pressure reduction through the valve 11, the liquid drops prepared in the Venturi tube 9 are injected into the water layer at the bottom of the three-phase separator 2 through the bottom inlet 26 of the three-phase separator.
Step 3, gasifying the low-boiling-point liquid drops injected into the three-phase separator 2 to generate micro bubbles, and increasing the oil-water density difference through bubble-oil drop adhesion; the unevaporated low boiling point droplets cause the fine oil droplets in the wastewater to coalesce and adsorb dissolved hydrocarbons in the wastewater by extraction.
And 5, pressurizing part of the treated water discharged from the water outlet 21 of the three-phase separator by using a pump 8 to be used as power fluid of the venturi tube 9, so that recycling is realized and no external addition is needed.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
Example 1
Referring to the attached figure 1, a method for treating oily sewage by air flotation and extraction in oil-gas-water separation equipment based on partial gasification of low-boiling-point liquid. The device is characterized by comprising a three-phase separator 2, a low boiling point liquid storage tank 4 and a Venturi tube 9. Wherein the upper end of the three-phase separator 2 is provided with an exhaust port 21, and the lower end is provided with a water outlet 22 and an oil outlet 23. The reflux treated water and the low boiling point liquid are mixed, and generate low boiling point liquid-treated water emulsion through the jet shearing action of the Venturi tube 9, and the low boiling point liquid drops are mixed with the well incoming liquid and enter the three-phase separator 2 from the inlet 24 of the three-phase separator or enter the water layer at the bottom of the three-phase separator 2 from the inlet 26 at the bottom of the three-phase separator.
The treated water discharged by the pump 8 is accelerated and depressurized at the throat of the Venturi tube, so that the negative pressure suction of low-boiling-point liquid is realized.
The venturi tube 9 mixes the incoming water with the low boiling point liquid, and after throttling and shearing by the valve 10, a large amount of low boiling point liquid drops and micro-bubbles are obtained and mixed with the well incoming liquid to enter the three-phase separator 2. The unevaporated low-boiling-point liquid drops extract fine oil drops in the sewage to form large flocs, and the large flocs absorb dissolved hydrocarbons in the sewage and float upwards quickly in a three-phase separator to realize the efficient separation of oil and water.
The preparation method of the low-boiling-point liquid drop has three methods. As shown in figure 1, liquid is sucked in by using negative pressure at the throat of a venturi tube 9, and low-boiling-point liquid drops are prepared through jet shearing; as shown in fig. 2, fine emulsified liquid is formed in the liquid storage tank 6 through high-speed shearing by the stirrer 7, and after the emulsified liquid is pressurized by the pump 8, pressure is released by the pressure reducing valve 9, so that partial gasification of low-boiling-point liquid drops is realized; as shown in fig. 3, the low boiling point liquid is pressurized by a pump 8 into an atomizing nozzle 9 or 12 to prepare a large amount of low boiling point liquid droplets.
The low boiling point liquid drops enter the three-phase separator in two ways, as shown in fig. 1, fig. 2 and fig. 3, the liquid drops and the gas bubbles are mixed with the incoming liquid of the production well through a valve f10 and enter from an inlet 24 of the three-phase separator; liquid droplets and gas bubbles enter from inlet 26 at the bottom of the three-phase separator through valve f 11.
The method for flotation and extraction treatment of oily sewage in the oil-gas-water separation equipment based on partial gasification of low-boiling-point liquid comprises the following steps:
Step 2, after the highly dispersed low-boiling-point liquid-water emulsion from the Venturi tube 9 is throttled and depressurized by a valve 10, the highly dispersed low-boiling-point liquid-water emulsion is mixed with the incoming flow of a production well and enters the three-phase separator 2 from an inlet 24 of the three-phase separator; or after throttling and pressure reduction through the valve 11, the liquid drops prepared in the Venturi tube 9 are injected into the water layer at the bottom of the three-phase separator 2 through the bottom inlet 26 of the three-phase separator.
Step 3, gasifying the low-boiling-point liquid drops injected into the three-phase separator 2 to generate micro bubbles, and increasing the oil-water density difference through bubble-oil drop adhesion; the unevaporated low boiling point droplets cause the fine oil droplets in the wastewater to coalesce and adsorb dissolved hydrocarbons in the wastewater by extraction.
And 5, pressurizing part of the treated water discharged from the water outlet 21 of the three-phase separator by using a pump 8 to be used as power fluid of the venturi tube 9, so that recycling is realized and no external addition is needed.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an oily sewage gas flotation and extraction processing system in oil gas water separation equipment based on gasification of low boiling liquid part which characterized in that includes: a three-phase separator (2), a low boiling point liquid storage tank (4) and a venturi tube (5); the top of the three-phase separator (2) is provided with an exhaust port (23), the upper part is provided with an inlet (24), and the bottom is provided with a bottom inlet (26), a water outlet (21) and an oil outlet (22); the production well come the liquid pipeline with the entry (24) of three-phase separator link to each other, the outlet conduit of the drainage pipe of three-phase separator (2) and low boiling liquid storage tank (4) joins in venturi (5), be provided with valve (10) on venturi (5) outlet conduit to join with the liquid pipeline that comes of production well, venturi (5) outlet conduit still links to each other with three-phase separator bottom entry (26).
2. The oil-containing sewage gas flotation and extraction treatment system in an oil-gas-water separation plant based on the partial gasification of low-boiling-point liquid according to claim 1, wherein an agitator is provided in the low-boiling-point liquid storage tank (6).
3. The oil-containing sewage gas flotation and extraction treatment system in an oil-gas-water separation plant based on the partial gasification of low-boiling-point liquid according to claim 1, characterized in that an atomizing nozzle (12) is arranged on the water outlet pipeline of the low-boiling-point liquid storage tank (4) at the junction of the water inlet pipeline of a production well.
4. The oil-containing sewage gas flotation and extraction treatment system in an oil-gas-water separation plant based on the partial gasification of low boiling point liquid according to claim 1, characterized in that the bottom inlet (26) of the three-phase separator is provided with an atomizing nozzle (9).
5. The oil-containing sewage gas flotation and extraction treatment system in an oil-gas-water separation plant based on the partial gasification of low-boiling-point liquid according to claim 1, characterized in that a booster pump (8) is provided on the water outlet pipe of the low-boiling-point liquid storage tank (4).
6. The oil-containing sewage gas flotation and extraction treatment system in an oil-gas-water separation plant based on the partial gasification of low boiling point liquid according to claim 1, characterized in that a booster pump (8) is provided on the water discharge pipeline of the three-phase separator (2).
7. The oily sewage gas flotation and extraction treatment system in an oil-gas-water separation plant based on the partial gasification of low-boiling-point liquid according to claim 1, characterized in that a valve (11) is arranged on the pipeline of the bottom inlet (26) of the three-phase separator.
8. A method for flotation and extraction treatment of oily sewage in oil-gas-water separation equipment based on partial gasification of low-boiling-point liquid is characterized by comprising the following steps:
part of the treated water in the water outlet (21) of the three-phase separator enters a Venturi tube (9) through pressurization, negative pressure is formed at the throat of the Venturi tube (9), and low-boiling-point liquid is sucked into the Venturi tube (9) and then mixed with the treated water to form highly dispersed low-boiling-point liquid-water emulsion;
the highly dispersed low-boiling-point liquid-water emulsion is throttled and depressurized, mixed with the incoming flow of a production well and enters the three-phase separator (2) from the inlet (24) of the three-phase separator;
or the highly dispersed low-boiling-point liquid-water emulsion is throttled and depressurized and then is injected into a water layer at the bottom of the three-phase separator (2) through a bottom inlet (26) of the three-phase separator;
the low boiling point liquid drops injected into the three-phase separator (2) are partially gasified to generate micro-bubbles; the unevaporated low boiling point liquid drops adsorb dissolved hydrocarbons in the sewage;
the micro bubbles rise to a gas-liquid interface in a floating way, enter a gas-phase space in the three-phase separator (2), are converged with the separated associated gas and are discharged from the gas outlet (23); the liquid drops with low boiling point which are not gasified enter the oil layer of the three-phase separator and are discharged from an oil discharge port (22); the treated sewage is discharged from the water outlet (21).
9. The method for the air flotation and extraction treatment of oily sewage in the oil-gas-water separation equipment based on the partial gasification of low-boiling-point liquid according to claim 8, wherein the operating temperature and pressure of the three-phase separator are in a gas-liquid two-phase region in a low-boiling-point liquid phase diagram.
10. The oil-containing sewage gas flotation and extraction treatment method in the oil-gas-water separation equipment based on the partial gasification of the low-boiling-point liquid as claimed in claim 8, wherein the component of the low-boiling-point liquid is C2-C5, preferably, the ratio is as follows: c230-45%, C330-45%, C45-20%, C55-15%, and C6 and above < 5%.
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| CN117298657A (en) * | 2023-11-30 | 2023-12-29 | 中国石油大学(华东) | Oil-gas-water separation system and method for high-water-content produced liquid of ocean platform |
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| US20210122985A1 (en) * | 2019-10-28 | 2021-04-29 | Saudi Arabian Oil Company | Upgrading and extraction of heavy oil by supercritical water |
| CN113830913A (en) * | 2021-10-29 | 2021-12-24 | 山东华伊环境技术有限公司 | Micro-power flotation separation equipment |
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| CN117298657A (en) * | 2023-11-30 | 2023-12-29 | 中国石油大学(华东) | Oil-gas-water separation system and method for high-water-content produced liquid of ocean platform |
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