An oil, gas, and water treatment system, separation apparatus, and method of use

Abstract

The application discloses a separation device of an oil-gas-water treatment system, which comprises a heating part, a negative pressure separation part located downstream of the heating part, a negative pressure separation chamber arranged in the negative pressure separation part, an oil-removing filter layer arranged in the negative pressure separation chamber and separating the negative pressure separation chamber into an upper chamber and a lower chamber arranged in a vertical mode, an outlet of the lower chamber for discharging a mixture of oil and small particles, an outlet of the upper chamber for discharging a mixture of gas and gaseous water in oil-gas-water, a filter part for filtering the small particles, an outlet of the filter part for discharging oil, and a water-gas separation part comprising a pressurizing part and a cooling part arranged in sequence, wherein the mixture of gas and gaseous water in the discharged oil-gas-water is separated after passing through the pressurizing part and the cooling part. The separation device has a relatively ideal separation effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas well produced water treatment, in particular to an oil and gas water treatment system, a separation device thereof and a use method. BACKGROUND

[0002] With the substantial increase in the exploitation of land and offshore oil and gas fields, and the continuation of the exploitation, the water content of oil wells is getting higher and higher, and is often accompanied by a large amount of gas, which brings great pressure to the existing oil and gas water separation technology and system, and makes the defects of traditional separation technology gradually appear, affecting the development of oil and gas exploitation technology.

[0003] Because the sewage or oil and gas water produced by oil and gas field exploitation usually contains a large amount of emulsified oil, it cannot be separated by standing or simple cyclone. Meanwhile, many small particles are wrapped in the emulsified oil during the formation process, which greatly affects the separation effect of oil and gas water. In the prior art, the separation and treatment of oil and gas water is usually realized by a three-phase separation device to separate the solid particles, gas and liquid in the oil and gas water, and then the liquid is subjected to demulsification and separation to realize water and oil separation. Although this separation effect is relatively fast, the small particles in the emulsified oil cannot be separated out, resulting in that the water and oil separated after demulsification both contain a large amount of small particles, which affects the use and discharge of water and oil, and the current water and oil separation after demulsification usually adopts a direct liquid filtration method, which has poor separation effect on small particles and is difficult to achieve good separation effect of water, gas and oil in one separation.

[0004] Therefore, how to provide a device with ideal separation effect has become a technical problem urgently to be solved by those skilled in the art. SUMMARY

[0005] The technical problem solved by the present application is to provide a separation device with ideal separation effect, which comprises:

[0006] A heating part, the heating part comprises a heating flow channel and a heating part inlet and a heating part outlet connected with both ends of the heating flow channel, the heating part inlet is connected with a channel, the channel transports oil and gas water filtered by a coarse filter device and then subjected to demulsification, the demulsified oil and gas water is oil and gas water whose emulsified oil is demulsified to realize oil and water separation, and the heating part further comprises a heat supply part for supplying heat to the heating flow channel;

[0007] a negative pressure separation part, which is located downstream of the heating part, a negative pressure separation chamber is arranged in the negative pressure separation part, the negative pressure separation chamber is provided with an oil-repellent filter layer to separate the negative pressure separation chamber into an upper chamber and a lower chamber arranged in a top-bottom manner, the negative pressure separation part comprises a negative pressure separation chamber inlet communicating with the lower chamber, the negative pressure separation chamber inlet communicates with the heating part outlet, the negative pressure separation part further comprises a lower chamber outlet communicating with the lower chamber and an upper chamber outlet communicating with the upper chamber, the lower chamber outlet discharges a mixture of oil and micro-particles, and the upper chamber outlet discharges a mixture of gas and gaseous water in the oil-gas-water;

[0008] a filter part comprising an inlet, an outlet and a filter layer arranged inside, the inlet communicates with the lower chamber outlet, the filter layer is used to filter out the micro-particles, and the outlet discharges oil;

[0009] a water-gas separation part comprising a pressurizing part and a cooling part arranged in sequence, the pressurizing part communicates with the upper chamber outlet, and the discharged mixture of gas and gaseous water in the oil-gas-water is separated after passing through the pressurizing part and the cooling part.

[0010] Preferably, the heating part comprises a heating shell and a heating pipeline arranged in the heating shell, a cavity for heating is arranged between the heating shell and the heating pipeline, and a heat supply part is arranged in the cavity.

[0011] Preferably, the heat supply part is an electric heating device or a fluid heating device, and when the heat supply part is a fluid heating device, the fluid heating device comprises hot water or hot air flowing in the cavity.

[0012] Preferably, a stirring fan is arranged in the heating flow channel.

[0013] Preferably, the oil-repellent filter layer is prepared from an oil-repellent sponge material, and the oil static contact angle of the oil-repellent sponge material is greater than or equal to 160°.

[0014] Preferably, the oil-repellent filter layer is a PFDMS-DA-TiO2 sponge material.

[0015] Preferably, the filter layer is prepared from an oil-repellent material.

[0016] The separation device has the following technical effects:

[0017] The separation device separates oil and small particles from oil-gas-water after coarse filtration and subsequent demulsification separation, and the demulsified oil-gas-water carries small particles, which are separated through the heating part and the negative pressure separation part, and the oil-water separation is separated by using the heating and negative pressure gasification separation mode, and is realized through the oleophobic filter layer setting, so that the preliminary separation of the mixture of oil and small particles, the gas in the oil-gas-water and the gaseous water is realized, the defect that the small particles are brought into the water gas in the separation process in the prior art is avoided, the secondary separation and purification of the water gas can be reduced, and through the subsequent filter part and the water-gas separation part, the efficient separation of water, gas and oil is realized.

[0018] As preferred, when the fluid heating device is used, the fluid heating device includes hot water or hot air flowing in the cavity, and the cost is low.

[0019] As preferred, the demulsification effect is improved by heating and crushing of the stirring fan, so that the oil-water separation effect is improved.

[0020] The application also provides a use method of the separation device of the oil-gas-water treatment system, which adopts the separation device of the oil-gas-water treatment system, and includes the following steps.

[0021] The oil-gas-water filtered by the coarse filtration device and then demulsified is introduced into the heating part and heated to 70-80 DEG C, and then enters the negative pressure separation part under the condition of-40 to-60 kPa negative pressure, the gas in the oil-gas-water and the water changed into gas pass through the oleophobic filter layer into the upper chamber, and are discharged from the upper chamber outlet, and the oil and small particles in the oil-gas-water gather on the lower surface of the oleophobic filter layer and fall back to the lower chamber and are discharged from the lower chamber outlet;

[0022] The mixture of oil and small particles discharged from the lower chamber outlet enters the filter part, and then the oil is separated;

[0023] The mixture of gas and gaseous water in the oil-gas-water discharged from the upper chamber outlet passes through the pressure increasing part and the temperature decreasing part in sequence, is first pressurized to atmospheric pressure, and then is cooled, so that water and gas are separated.

[0024] The method has the same technical effects as the separation device.

[0025] The application also provides an oil-gas-water treatment system, which includes:

[0026] The coarse filtration device is internally provided with a coarse filter layer for filtering solid particles;

[0027] The physical demulsification device is located downstream of the coarse filtration device and is communicated with the coarse filtration device, the physical demulsification device has an inlet communicated with the outlet of the coarse filtration device, an outlet communicated with the inlet of the heating part and a demulsification part for demulsifying the emulsified oil in the oil-gas-water to realize oil-water separation.

[0028] The separation device, the heating part is located downstream of the physical demulsification device and communicates with the physical demulsification device.

[0029] Preferably, the demulsification part comprises a demulsification tank and a plurality of parallel demulsification plates arranged in the demulsification tank in sequence along the length direction of the demulsification tank, and a plurality of micro-holes are arranged on each demulsification plate, and along the flow direction of the oil-gas-water, the front side and the rear side of each demulsification plate are high-pressure area and low-pressure area respectively, and the pressure difference of the high-pressure area and the low-pressure area is at least 2 times.

[0030] Preferably, the pore size of the micro-holes is 2-10 μm.

[0031] Preferably, the demulsification plates are arranged obliquely, and the demulsification plates form an angle of 30-60° with the direction of the liquid entering through the inlet of the physical demulsification device.

[0032] Preferably, the angle is 45-60°.

[0033] Preferably, the coarse filter layer is made of oil-repellent material.

[0034] Preferably, the coarse filter layer is a filter layer composed of quartz sand, anthracite, and macroporous silica particles modified by organic alcohol.

[0035] Preferably, the organic alcohol is polyvinyl alcohol and / or polyethylene glycol.

[0036] The oil-gas-water treatment system has the same technical effects as the above-mentioned separation device.

[0037] Preferably, during use, due to the different pressures on both sides of the demulsification plates, the emulsified oil particles in the oil-gas-water flow in the high-pressure area and enter the low-pressure area from the micro-holes under the action of pressure, and rapidly expand and break in the low-pressure environment, realizing demulsification; at the same time, due to the different pressures on both sides of the demulsification plates, the flow rates on both sides of the demulsification plates are also different, forming a flow rate conflict, further increasing the demulsification effect.

[0038] The application also provides a use method of an oil-gas-water treatment system, which adopts the above-mentioned oil-gas-water treatment system, comprising:

[0039] The oil-gas-water passing through the settling tank is introduced into the coarse filter device to obtain filtered oil-gas-water;

[0040] The filtered oil-gas-water is introduced into the physical demulsification device to demulsify the emulsified oil in the oil-containing sewage;

[0041] The demulsified oil, gas, and water are passed into the separation device and heated to 70-80°C. Then, the water is vaporized under a negative pressure of -40 to -60 kPa and separated into oil and fine particles, and gas and gaseous water in the oil, gas, and water mixture, through an oleophobic filter layer.

[0042] The mixture of oil and fine particles is passed into the filter section to separate the fine particles and oil;

[0043] The mixture of gas and gaseous water in the oil, gas and water is passed sequentially through the pressurization section and the cooling section. First, it is pressurized to atmospheric pressure and then cooled to achieve separation of water and gas.

[0044] This method achieves the same technical effect as the aforementioned processing system. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of a specific embodiment of the separation device for the oil, gas and water treatment system provided by the present invention.

[0046] Figure 2 This is a schematic diagram of a specific embodiment of the oil, gas and water treatment system provided by the present invention.

[0047] Figures 1-2 The labels in the attached figures are as follows:

[0048] 1. Heating shell, 2. Heating pipe, 3. Negative pressure separation chamber, 4. Oil-repellent filter layer, 5. Upper chamber, 6. Lower chamber, 7. Filter section, 8. Filter layer, 9. Pressurization section, 10. Cooling section, 11. Cavity, 12. Stirring fan, 13. Coarse filter device, 14. Coarse filter layer, 15. Demulsifier, 16. Demulsifier plate. Detailed Implementation

[0049] The specific embodiments of the present invention will be described in detail below with reference to the technical solutions and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] like Figures 1-2 As shown, Figure 1 This is a schematic diagram of a specific embodiment of the separation device for the oil, gas and water treatment system provided by the present invention.

[0051] Figure 2 This is a schematic diagram of a specific embodiment of the oil, gas and water treatment system provided by the present invention.

[0052] like Figure 1 As shown, a separation device for an oil, gas and water treatment system includes:

[0053] a heating section, the heating section comprising a heating flow channel and a heating section inlet and a heating section outlet connected to both ends of the heating flow channel, the heating section inlet being connected to a channel, the channel conveying oil gas water filtered by the coarse filter device 13 and then being demulsified, the demulsified oil gas water being oil gas water of which emulsified oil is demulsified to realize oil water separation, the heating section further comprising a heat supply section for supplying heat to the heating flow channel;

[0054] a negative pressure separation section located downstream of the heating section, the negative pressure separation section being provided with a negative pressure separation chamber 3, the negative pressure separation chamber 3 being provided with an oleophobic filter layer 4 to divide the negative pressure separation chamber into an upper chamber 5 and a lower chamber 6 arranged in a top-bottom manner, the negative pressure separation section comprising a negative pressure separation chamber inlet connected to the lower chamber 6, the negative pressure separation chamber inlet being connected to the heating section outlet, the negative pressure separation section further comprising a lower chamber outlet connected to the lower chamber 6 and an upper chamber outlet connected to the upper chamber 5, the lower chamber outlet discharging a mixture of oil and micro-particles, and the upper chamber outlet discharging a mixture of gas and gaseous water in the oil gas water;

[0055] a filter section 7 comprising an inlet, an outlet and a filter layer 8 arranged inside, the inlet being connected to the lower chamber outlet, the filter layer 8 being used to filter out the micro-particles, and the outlet discharging oil;

[0056] a water gas separation section comprising a pressurizing section 9 and a cooling section 10 arranged in sequence, the pressurizing section 9 being connected to the upper chamber outlet, and the mixture of gas and gaseous water in the discharged oil gas water being separated after passing through the pressurizing section 9 and the cooling section 10.

[0057] The separation device separates oil and micro-particles from oil gas water filtered by the coarse filter and then separated by demulsification, and the demulsified oil gas water contains micro-particles, which are separated by the heating section and the negative pressure separation section, and the oil water separation is separated by the heating and negative pressure gasification separation mode, and is arranged by the oleophobic filter layer 4, so as to realize the preliminary separation of the mixture of oil and micro-particles and the mixture of gas and gaseous water in the oil gas water, avoid the disadvantage that the micro-particles are brought into the water gas in the separation process in the prior art, reduce the secondary separation and purification of the water gas, and realize the efficient separation of water, gas and oil through the subsequent filter section 7 and water gas separation section.

[0058] As shown in Figure 1 the heating section comprises a heating shell 1 and a heating pipe 2 arranged in the heating shell 1, and the heating shell 1 and the heating pipe 2 have a cavity 11 for heating, and the cavity 11 is provided with a heat supply section.

[0059] The heating part is an electric heating device or a fluid heating device.

[0060] When the fluid heating device is used, the fluid heating device includes hot water or hot air flowing in the cavity 11, and the cost is low.

[0061] As shown in Figure 1 The heating flow channel is provided with a stirring fan 12. The breaking of the stirring fan 12 improves the demulsification effect, and facilitates the separation of oil and water.

[0062] The oil-repellent filter layer 4 is made of an oil-repellent sponge material, and the oil static contact angle is greater than or equal to 160°.

[0063] Further, the oil-repellent filter layer 4 is a PFDMS-DA-TiO2 sponge material.

[0064] Further, the filter layer 8 is made of an oil-repellent material.

[0065] The application also provides a use method of the separation device of the oil-gas-water treatment system, which adopts the separation device of the oil-gas-water treatment system.

[0066] The oil-gas-water filtered by the coarse filter device 13 and then demulsified is introduced into the heating part and heated to 70-80℃, and then introduced into the negative pressure separation part under the condition of negative pressure of-40 to-60 kPa. The gas in the oil-gas-water and the water in the gaseous state pass through the oil-repellent filter layer 4 into the upper chamber, and are discharged from the upper chamber outlet. The oil and the small particles in the oil-gas-water gather on the lower surface of the oil-repellent filter layer 4, and then fall back to the lower chamber 6 and are discharged from the lower chamber outlet.

[0067] The mixture of the oil and the small particles discharged from the lower chamber outlet enters the filter part, and the oil is separated.

[0068] The mixture of the gas and the water in the gaseous state in the oil-gas-water discharged from the upper chamber outlet passes through the pressure increasing part 9 and the temperature decreasing part 10 in sequence, is first pressurized to atmospheric pressure, and then is cooled, so that the water and the gas are separated.

[0069] The method has the same technical effects as the separation device.

[0070] As shown in Figure 2 The application also provides an oil-gas-water treatment system, which comprises:

[0071] The coarse filter device 13 is internally provided with a coarse filter layer 14 for filtering solid particles.

[0072] A physical demulsification device is located downstream of and in communication with the coarse filter device 13. The physical demulsification device has an inlet in communication with the outlet of the coarse filter device 13, an outlet in communication with the inlet of the heating device, and a demulsification device for demulsifying the emulsified oil in the oil-gas-water mixture to separate the oil and water.

[0073] The heating device is located downstream of and in communication with the physical demulsification device.

[0074] The oil-gas-water mixture is passed through the coarse filter device 13 to filter out solid particles, and then through the physical demulsification device to demulsify the emulsified oil, and then through the separation device to achieve the separation mentioned above.

[0075] As shown in Figure 2 The demulsification device includes a demulsification tank 15 and a plurality of demulsification plates 16 arranged in the demulsification tank 15 in sequence along the length direction of the demulsification tank 15. Each demulsification plate 16 is provided with a plurality of micro-holes. Along the flow direction of the oil-gas-water mixture, the front side and the back side of each demulsification plate 16 are high-pressure zones and low-pressure zones, respectively. The pressure difference between the high-pressure zone and the low-pressure zone is at least 2 times.

[0076] During use, the emulsified oil particles in the oil-gas-water mixture flow into the low-pressure zone from the micro-holes under the action of pressure when flowing in the high-pressure zone, and rapidly expand and break in the low-pressure environment, achieving demulsification. At the same time, the different pressures on both sides of the demulsification plate 16 also cause different flow rates on both sides of the demulsification plate 16, forming a flow rate conflict, further increasing the demulsification effect.

[0077] The diameter of the micro-holes is 2-10 μm.

[0078] Further, the demulsification plate 16 is arranged obliquely, and the demulsification plate 16 forms an angle of 30-60° with the direction of the liquid entering through the inlet of the physical demulsification device.

[0079] Further, the angle is 45-60°.

[0080] The coarse filter layer 14 is made of an oil-repellent material.

[0081] Further, the coarse filter layer 14 is a filter layer made of a mixture of quartz sand, anthracite, and macroporous silica particles modified by an organic alcohol.

[0082] Further, the organic alcohol is polyvinyl alcohol and / or polyethylene glycol.

[0083] The oil-gas-water treatment system has the same technical effects as the separation device described above.

[0084] The application further provides a method for using the oil-gas-water treatment system, which comprises the following steps:

[0085] The oil-gas-water passing through the settling tank is introduced into the rough filter device 13 to obtain filtered oil-gas-water;

[0086] The filtered oil-gas-water is introduced into the physical demulsification device to demulsify the emulsified oil in the oil-containing sewage;

[0087] The demulsified oil-gas-water is introduced into the separation device and heated to 70-80℃, then the water therein is gasified under the condition of negative pressure of-40 to-60 kPa, and passes through the oleophobic filter layer 4 to realize the separation of the mixture of oil and small particles, the mixture of gas and gaseous water in the oil-gas-water;

[0088] The mixture of oil and small particles is introduced into the filtering part 7 to separate the small particles and the oil;

[0089] The mixture of gas and gaseous water in the oil-gas-water is sequentially introduced into the pressurizing part 9 and the cooling part 10, first pressurized to atmospheric pressure, and then cooled to realize the separation of water and gas.

[0090] The method has the same technical effects as the treatment system.

[0091] The above embodiments are only exemplary embodiments of the application and are not used to limit the application, and the protection scope of the application is defined by the claims. Various modifications or equivalent replacements made by those skilled in the art to the application within the spirit and protection scope of the application also fall within the protection scope of the application.

Claims

1. A separation device for an oil, gas and water treatment system, characterized in that, The application relates to a device for separating oil, gas and water, comprising: a heating part, which comprises a heating flow channel and a heating part inlet and a heating part outlet connected with both ends of the heating flow channel, the heating part inlet is connected with a channel, the channel transports oil, gas and water filtered by a coarse filter device and then subjected to demulsification, the demulsified oil, gas and water is oil, gas and water of which emulsified oil is demulsified to realize oil-water separation, the heating part further comprises a heat supply part for supplying heat to the heating flow channel; a negative pressure separation part located downstream of the heating part, a negative pressure separation chamber is arranged in the negative pressure separation part, the negative pressure separation chamber is provided with an oil-repellent filter layer to separate the negative pressure separation chamber into an upper chamber and a lower chamber arranged in a top-bottom mode, the negative pressure separation part comprises a negative pressure separation chamber inlet connected with the lower chamber, the negative pressure separation chamber inlet is connected with the heating part outlet, the negative pressure separation part further comprises a lower chamber outlet connected with the lower chamber and an upper chamber outlet connected with the upper chamber, the lower chamber outlet discharges a mixture of oil and micro-particles, and the upper chamber outlet discharges a mixture of gas and gaseous water in the oil, gas and water; a filter part, which comprises an inlet, an outlet and a filter layer arranged in the filter part, the inlet is connected with the lower chamber outlet, the filter layer is used for filtering out the micro-particles, and the outlet discharges oil; a water-gas separation part, which comprises a pressurizing part and a cooling part arranged in sequence, the pressurizing part is connected with the upper chamber outlet, and the mixture of gas and gaseous water in the discharged oil, gas and water is separated after passing through the pressurizing part and the cooling part.

2. The separation device of an oil, gas and water treatment system according to claim 1, characterized in that The heating part comprises a heating shell and a heating pipeline arranged in the heating shell, a cavity for heating is arranged between the heating shell and the heating pipeline, and a heat supply part is arranged in the cavity.

3. The separation device of an oil, gas and water treatment system according to claim 2, characterized in that The heat supply part is an electric heating device or a fluid heating device, when the heat supply part is the fluid heating device, the fluid heating device comprises hot water or hot air flowing in the cavity.

4. The separation device of an oil, gas and water treatment system according to claim 1, characterized in that, A stirring fan is arranged in the heating flow channel.

5. The separation device of an oil, gas, and water treatment system of claim 1, wherein, The oil-repellent filter layer is prepared from an oil-repellent sponge material, and an oil static contact angle of the oil-repellent sponge material is greater than or equal to 160 degrees.

6. The separation device of an oil, gas and water treatment system according to claim 5, characterized in that The oil-repellent filter layer is a PFDMS-DA-TiO2 sponge material.

7. The separation device of an oil, gas and water treatment system according to claim 1, characterized in that The filter layer is prepared from an oil-repellent material.

8. A method of using a separation device of an oil, gas and water treatment system, using the separation device of an oil, gas and water treatment system according to any one of claims 1 to 7, characterized in that, The application further relates to a method for separating oil, gas and water, comprising the following steps: the oil, gas and water filtered by the coarse filter device and then subjected to demulsification is introduced into the heating part, heated to 70-80 DEG C, and then introduced into the negative pressure separation part under a negative pressure of-40 to-60 kPa, gas and water changed into a gaseous state in the oil, gas and water enter the upper chamber through the oil-repellent filter layer, and are discharged from the upper chamber outlet, oil and micro-particles in the oil, gas and water gather on the lower surface of the oil-repellent filter layer, and then fall back to the lower chamber and are discharged from the lower chamber outlet; the mixture of oil and micro-particles discharged from the lower chamber outlet enters the filter part, and then the oil is separated; the mixture of gas and gaseous water in the oil, gas and water discharged from the upper chamber outlet passes through the pressurizing part and the cooling part in sequence, is pressurized to atmospheric pressure first, and then cooled, so that water and gas are separated.

9. An oil, gas and water treatment system characterized by, The application further relates to a device for separating oil, gas and water, comprising: a coarse filter device, which is internally provided with a coarse filter layer for filtering out solid particles; A physical demulsification device is located downstream of the coarse filter device and is connected to the coarse filter device, and has an inlet connected to the outlet of the coarse filter device, an outlet connected to the inlet of the heating device, and a demulsification device for demulsifying the emulsified oil in the oil-gas-water mixture to separate the oil and water. The separation device of any one of claims 1-7, wherein the heating device is located downstream of the physical demulsification device and is connected to the physical demulsification device.

10. The oil, gas and water treatment system of claim 9, wherein, The demulsification device comprises a demulsification tank and a plurality of demulsification plates arranged in the demulsification tank in sequence along the length direction of the demulsification tank, each of the demulsification plates is provided with a plurality of micropores, and along the flow direction of the oil-gas-water mixture, the front side and the rear side of each of the demulsification plates are high-pressure area and low-pressure area respectively, and the pressure difference between the high-pressure area and the low-pressure area is at least 2 times.

11. The oil, gas and water treatment system of claim 10, wherein, The micropores have a pore size of 2-10 μm.

12. The oil, gas and water treatment system of claim 10, wherein, The demulsification plates are arranged obliquely, and the demulsification plates form an angle of 30-60° with the direction of the liquid entering through the inlet of the physical demulsification device.

13. The oil, gas and water treatment system of claim 12, wherein, The angle is 45-60°.

14. The oil, gas and water treatment system of claim 9, wherein, The coarse filter layer is made of oil-repellent material.

15. The oil, gas and water treatment system of claim 14, wherein, The coarse filter layer is a filter layer made of a mixture of quartz sand, anthracite, and macroporous silica particles modified by organic alcohol.

16. The oil, gas and water treatment system of claim 15, wherein, The organic alcohol is polyvinyl alcohol and / or polyethylene glycol.

17. A method of using an oil, gas and water treatment system according to any one of claims 9 to 16, wherein, The method comprises: feeding the oil-gas-water mixture through the settling tank into the coarse filter device to obtain filtered oil-gas-water mixture; feeding the filtered oil-gas-water mixture into the physical demulsification device to demulsify the emulsified oil in the oil-containing sewage; feeding the demulsified oil-gas-water mixture into the separation device, heating to 70-80°C, and then gasifying the water in the oil-gas-water mixture under a negative pressure of -40 to -60 kPa, and passing through the oil-repellent filter layer to separate the mixture of oil and fine particles, the mixture of gas and gaseous water in the oil-gas-water mixture; feeding the mixture of oil and fine particles into the filter device to separate the fine particles and the oil; feeding the mixture of gas and gaseous water in the oil-gas-water mixture into the pressurization device and the cooling device in sequence, first pressurizing to atmospheric pressure, and then cooling to separate the water and the gas.

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