CN214327319U - Filter element and assembly for oil-water separation pretreatment and oil-water separation device - Google Patents
Filter element and assembly for oil-water separation pretreatment and oil-water separation device Download PDFInfo
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- CN214327319U CN214327319U CN202022632387.6U CN202022632387U CN214327319U CN 214327319 U CN214327319 U CN 214327319U CN 202022632387 U CN202022632387 U CN 202022632387U CN 214327319 U CN214327319 U CN 214327319U
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Abstract
The utility model discloses a subassembly and oil-water separator that is used for oil-water separation preliminary treatment's filter core and uses, this filter core include a filter element section of thick bamboo, and the upper cover at filter element section of thick bamboo top is detained to the lid to and the lower closing cap at filter element bobbin base portion is detained to the lid, a filter element section of thick bamboo from outer to inner includes in proper order: the device comprises a protective net outer cylinder, a hydrophilic oleophobic filter screen middle cylinder, a filling layer and an inner cylinder; the filling layer is formed by stacking hydrophilic oleophobic glass fiber filter wires and oleophilic hydrophobic glass fiber filter wires; a plurality of water through holes are formed on the inner cylinder; the lower sealing cover is provided with a liquid outlet. The utility model discloses a hydrophilic oleophobic glass fiber filter and oleophylic hydrophobic nature glass fiber filter pile up and form the filling layer as the filler, and hydrophilic oleophobic filter screen and protection network are dredged to the periphery parcel, and the filter core of obtaining and the subassembly and the oil water separator who use not only can effectively hold back particulate matter and the great oil drop in the oil field output liquid, can also get rid of the emulsified oil in the oil field output liquid, guarantee simultaneously that the filter core is difficult for being polluted, and long service life.
Description
Technical Field
The utility model relates to an oil field output liquid handles technical field, concretely relates to a subassembly and oil-water separator that is used for oil-water separation preliminary treatment's filter core and uses thereof.
Background
Offshore oil field exploitation has become an important measure for ensuring the stability of crude oil in China and reducing the dependence of petroleum import. However, offshore fields continue to increase in water content as the age of waterflooding increases. The daily oil field output liquid volume of the drilling platform reaches thousands of squares or even tens of thousands of squares, and serious negative effects are brought to economy and environment. At present, 70 percent of offshore oil fields in China enter a high water content stage, and oil field output liquid is generated daily to 10000m3And d, the stable yield of the extract is urgently needed by an oil-water separation technology.
The existing treatment process of the output liquid of the drilling platform oil field consists of an inclined plate oil separator, a compact type rotational flow air flotation, a pre-filtering water tank and a walnut shell filter, is a typical traditional three-stage water flow, and has the problems of high manufacturing cost, large occupied area, limited treatment capacity, high process maintenance cost, low treatment efficiency, high material cost, short service life, easy blockage of membrane holes, incapability of removing emulsified oil and the like.
At present, a more optimized oil-water separation filter element and a matched oil-water separation device thereof are urgently needed in the market to solve the problem that the produced liquid of an offshore oil field is too high in the daily period when the offshore oil field enters a high water content stage.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a subassembly and oil-water separator that is used for oil-water separation preliminary treatment's filter core and uses, this filter core, subassembly and oil-water separator not only can effectively hold back the particulate matter in the output liquid of oil field and great oil drip, can also remove the emulsified oil in the output liquid of oil field, guarantee simultaneously that the filter core is difficult for being contaminated, and long service life.
The specific technical scheme is as follows:
the utility model provides a filter core for water oil separating preliminary treatment, including a filter core section of thick bamboo, the upper cover at filter core section of thick bamboo top is detained to the lid to and the lower closing cap at filter core bobbin base portion is detained to the lid, a filter core section of thick bamboo is by outer to interior including in proper order: the device comprises a protective net outer cylinder, a hydrophilic oleophobic filter screen middle cylinder, a filling layer and an inner cylinder; the filling layer is formed by stacking hydrophilic oleophobic glass fiber filter wires and oleophilic hydrophobic glass fiber filter wires; a plurality of water through holes are formed in the inner cylinder; and a liquid outlet is arranged on the lower sealing cover.
In the utility model, the hydrophilic oleophobic filter screen removes the floating oil and larger oil drops (i.e. oil drops with diameter larger than 50 microns, excluding emulsified oil) and suspended solid in the oily wastewater (such as oil field output liquid) by the traditional separation principle; the filling layer is used for demulsifying and dredging the oily wastewater by using hydrophilic oleophobic glass fiber filter wires and oleophilic hydrophobic glass fiber filter wires to remove emulsified oil in the produced liquid of the oilfield, wherein the emulsified oil comprises two types of oil-in-water and water-in-oil (namely emulsified oil with the diameter of more than 20 microns); the emulsified oil passes through the glass fiber filter element and then is demulsified, separated and grown to become large oil drops which naturally float upwards, so as to be beneficial to the subsequent advanced treatment of further oil-water separation.
In the utility model, the upper sealing cover is closed, and the lower sealing cover is only provided with a liquid outlet; the hydrophilic oleophobic glass fiber filter wire and the oleophilic hydrophobic glass fiber filter wire are stacked around the inner cylinder. The hydrophilic oleophobic filter screen, the hydrophilic oleophobic glass fiber filter wire and the oleophilic hydrophobic glass fiber filter wire can be directly purchased from the market, and can also be obtained by carrying out hydrophilic oleophobic or oleophilic hydrophobic treatment on the filter screen and the glass fiber filter wire by the conventional technical means.
The mass ratio of the hydrophilic oleophobic glass fiber filter wire to the hydrophilic oleophilic hydrophobic glass fiber filter wire influences the demulsification and separation capacity of the fiber structure for emulsified oil. Preferably, the mass ratio of the hydrophilic oleophobic glass fiber filter wire to the hydrophilic oleophilic hydrophobic glass fiber filter wire is 1: 0.25-4; more preferably, the mass ratio of the hydrophilic oleophobic glass fiber filter to the hydrophilic hydrophobic glass fiber filter is 1: 1.
The radius difference between the outer cylinder and the inner cylinder of the protective net, namely the radial thickness of a bed layer, can influence the contact time between liquid in the filter element cylinder and the glass fiber filter wires, thereby influencing the filtering effect; preferably, the radius difference between the outer cylinder and the inner cylinder of the protective net is 20-80 mm; more preferably, the radius difference between the outer cylinder and the inner cylinder of the protective net is 30-40 mm.
Further, the hydrophilic oleophobic glass fiber filter wires are stacked to form a hydrophilic oleophobic glass fiber layer, and the oleophilic hydrophobic glass fiber filter wires are stacked to form an oleophilic hydrophobic glass fiber layer; the filling layer is formed by alternately stacking hydrophilic oleophobic glass fiber layers and hydrophilic oily hydrophobic glass fiber layers.
Preferably, in the alternately stacked filling layers, the thickness of each hydrophilic oleophobic glass fiber layer is 0.2-0.8 cm; the bulk density of each hydrophilic oleophobic glass fiber layer is 0.2-0.5 g/cm3(ii) a More preferably, the thickness of each hydrophilic oleophobic glass fiber layer is 0.5 cm; the bulk density of each hydrophilic oleophobic glass fiber layer is 0.35g/cm3。
Preferably, in the alternately stacked filling layers, the thickness of each oleophylic and hydrophobic glass fiber layer is 0.2-0.8 cm; the bulk density of each oleophylic and hydrophobic glass fiber layer is 0.2-0.5 g/cm3(ii) a More preferably, the thickness of each oleophylic and hydrophobic glass fiber layer is 0.5 cm; the bulk density of each oleophylic and hydrophobic glass fiber layer is 0.35g/cm3。
Preferably, the monofilament diameter of the hydrophilic and oleophobic glass fiber filter wire is 15-25 μm; the diameter of the single filament of the oleophylic and hydrophobic glass fiber filter wire is 15-25 μm.
Preferably, the outer cylinder of the protective net is made of stainless steel, meshes are rhombic, the thickness of the cylinder wall is 2-5 mm, and the aperture of each mesh is 1-2 cm.
Preferably, the middle cylinder of the hydrophilic oleophobic filter screen is made of stainless steel, and the aperture of the mesh is 30-50 meshes.
Further, a section of liquid outlet pipe extends outwards from the bottom of the lower sealing cover; preferably, the body of the liquid outlet pipe is provided with threads and a sealing ring. Furthermore, a connecting head extends outwards from the top of the upper sealing cover; preferably, the pipe body of the connector is provided with threads and a sealing ring.
The utility model also protects an oil-water separation subassembly, including a plurality of as above be used for oil-water separation preliminary treatment's filter core.
The utility model also protects an oil-water separation preprocessing device, including the casing with set up in a plurality of inside as above of casing a filter core for oil-water separation preprocessing.
The utility model also protects an oil-water separation preprocessing device, including the casing with set up in the casing inside as above the oil-water separation subassembly.
Furthermore, the utility model also provides a more concrete oil-water separation pretreatment filter element component, which comprises a plurality of filter elements, a bracket and a water collector;
the filter core includes a filter core section of thick bamboo, and the lid is buckled at the last closing cap at filter core section of thick bamboo top to and the lid is buckled at the lower closing cap of filter core bobbin base portion, a filter core section of thick bamboo is by outer to interior include in proper order: the device comprises a protective net outer cylinder, a hydrophilic oleophobic filter screen middle cylinder, a filling layer and an inner cylinder; the filling layer is formed by stacking hydrophilic oleophobic glass fiber filter wires and oleophilic hydrophobic glass fiber filter wires; a plurality of water through holes are formed in the inner cylinder; a liquid outlet is arranged on the lower sealing cover; the filter element is fixed on the support, and a liquid outlet of the filter element is communicated with an outlet of the water collector.
On the basis of the specific structure of the filter element assembly, the support is provided with a plurality of joints for fixing the filter element, and two ends of each joint are respectively communicated with a liquid outlet of the filter element and an inlet of the water collector.
Furthermore, a section of liquid outlet pipe extends outwards from the bottom of the lower sealing cover, and the liquid outlet pipe is inserted into the joint, so that the filter element is fixed on the bracket; the assembly and disassembly of the filter element are facilitated.
Furthermore, the water collector is positioned below the bracket and is provided with a plurality of water collecting branch pipes and a main water collecting pipe communicated with each branch pipe; each water collecting branch pipe is respectively communicated with the corresponding joint.
Further, the support is disc-shaped, and the joints are arranged annularly; one end of the joint is connected with the liquid outlet pipe of the filter element, and the other end of the joint is connected with the water collecting branch pipe of the water collector.
Based on the specific structure of the filter element component, the internal structure and material parameters of the filter element are further defined, namely: the mass ratio of the hydrophilic oleophobic glass fiber filter wire to the hydrophilic oleophobic glass fiber filter wire is 1: 0.25-1: 4; the radius difference between the outer cylinder and the inner cylinder of the protective net is 20-80 mm.
Further, the hydrophilic oleophobic glass fiber filter wires are stacked to form a hydrophilic oleophobic glass fiber layer, and the oleophilic hydrophobic glass fiber filter wires are stacked to form an oleophilic hydrophobic glass fiber layer; the filling layer is formed by alternately stacking hydrophilic oleophobic glass fiber layers and hydrophilic oily hydrophobic glass fiber layers.
Furthermore, the thickness of each hydrophilic and oleophobic glass fiber layer is 0.2-0.8 cm, and the bulk density is 0.2-0.5 g/cm3(ii) a Each oleophylic and hydrophobic glass fiber layer has the thickness of 0.2-0.8 cm and the bulk density of 0.2-0.5 g/cm3(ii) a The monofilament diameter of the hydrophilic and oleophobic glass fiber filter wire is 15-25 mu m; the diameter of the single filament of the oleophylic and hydrophobic glass fiber filter wire is 15-25 μm.
Based on the specific structure of the filter element assembly, the utility model also provides an oil-water separation pretreatment device, which comprises a shell, wherein the oil-water separation pretreatment filter element assembly is arranged in the shell, and the oil-water separation pretreatment filter element assembly is fixed on the inner wall of the shell through a bracket; the upper part of the shell is provided with a liquid inlet, the lower part of the shell is provided with a liquid outlet communicated with the outlet of the water collector, and the top of the shell is provided with an oil discharge port.
Furthermore, a backflow port is formed in the upper part of the shell; the oily liquid discharged in the subsequent oil-water separation process can be returned to the device through the return opening for secondary treatment.
Furthermore, an ultrasonic vibration plate is placed at the bottom of the shell and is located below the water collector.
Furthermore, the utility model also provides another more specific oil-water separation pretreatment device, which comprises a shell,
a filter element assembly is arranged in the shell and comprises a plurality of filter elements, a bracket and a water collector; the filter core includes a filter core section of thick bamboo, and the lid is buckled at the last closing cap at filter core section of thick bamboo top to and the lid is buckled at the lower closing cap of filter core bobbin base portion, a filter core section of thick bamboo is by outer to interior include in proper order: the device comprises a protective net outer cylinder, a hydrophilic oleophobic filter screen middle cylinder, a filling layer and an inner cylinder; the filling layer is formed by stacking hydrophilic oleophobic glass fiber filter wires and oleophilic hydrophobic glass fiber filter wires; a plurality of water through holes are formed in the inner cylinder; a liquid outlet is arranged on the lower sealing cover; the filter element is fixed on the bracket, and a liquid outlet of the filter element is communicated with an outlet of the water collector; the upper part of the shell is provided with a liquid inlet, the lower part of the shell is provided with a liquid outlet, and the top of the shell is provided with an oil outlet and an exhaust port.
Based on the specific structure of the device, a backflow port is further arranged at the upper part of the shell; an ultrasonic vibration plate is placed at the bottom of the shell and is located below the water collector.
Furthermore, a liquid level meter and a thermometer are installed on the upper portion of the shell, a pressure gauge is installed on the top of the shell, a discharge pipe is arranged at the bottom of the shell, and a hand hole is formed in the middle of the shell.
Furthermore, the support is fixed on the inner wall of the shell, a plurality of joints for fixing the filter element are arranged on the support, and two ends of each joint are respectively communicated with a liquid outlet of the filter element and an inlet of the water collector; the liquid outlet is communicated with the outlet of the water collector.
Furthermore, a section of liquid outlet pipe extends outwards from the bottom of the lower sealing cover, and the liquid outlet pipe is inserted into the joint, so that the filter element is fixed on the bracket; the water collector is positioned below the bracket and is provided with a plurality of water collecting branch pipes and a main water collecting pipe communicated with each branch pipe; each water collecting branch pipe is respectively communicated with the corresponding joint.
Further, the support is disc-shaped, and the joints are arranged annularly; one end of the joint is connected with the liquid outlet pipe of the filter element, and the other end of the joint is connected with the water collecting branch pipe of the water collector.
Based on the specific structure of the device, the internal structure and material parameters of the filter element are further defined, namely: the mass ratio of the hydrophilic oleophobic glass fiber filter wire to the hydrophilic oleophobic glass fiber filter wire is 1: 0.25-1: 4; the radius difference between the outer cylinder and the inner cylinder of the protective net is 20-80 mm.
Further, the hydrophilic oleophobic glass fiber filter wires are stacked to form a hydrophilic oleophobic glass fiber layer, and the oleophilic hydrophobic glass fiber filter wires are stacked to form an oleophilic hydrophobic glass fiber layer; the filling layer is formed by alternately stacking hydrophilic oleophobic glass fiber layers and hydrophilic oily hydrophobic glass fiber layers.
Furthermore, the thickness of each hydrophilic and oleophobic glass fiber layer is 0.2-0.8 cm, and the bulk density is 0.2-0.5 g/cm3(ii) a Each oleophylic and hydrophobic glass fiber layer has the thickness of 0.2-0.8 cm and the bulk density of 0.2-0.5 g/cm3(ii) a The monofilament diameter of the hydrophilic and oleophobic glass fiber filter wire is 15-25 mu m; the diameter of the single filament of the oleophylic and hydrophobic glass fiber filter wire is 15-25 μm.
The application also provides a pretreatment method of the oil field produced fluid, which comprises the following steps: and introducing the oil field output liquid into the oil-water separation pretreatment device from a liquid inlet, controlling the pressure and the liquid treatment amount of the incoming liquid, pretreating the oil field output liquid, obtaining the pretreated output liquid from a liquid outlet, and collecting oil drops from an oil discharge port.
Too much liquid throughput, i.e. too much oily waste water per unit time passing through the liquid, too short a residence time of the single emulsion in contact with the fibrous filter filaments in the filter element in the device, results in a decrease in the separation efficiency.
To ensure that the device can operate at the highest oil removal efficiency and has longer service life. In addition, the oil discharge frequency affects the oil removal efficiency, so the preferable pressure of the incoming liquid is 0.1-0.44 MPa, and the liquid treatment capacity is 1-4 m3H; the frequency of oil discharge is 0.5-1 min
And/20-30 minutes.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses a hydrophilic oleophobic glass fiber filter and oleophylic hydrophobic nature glass fiber filter pile up and form the filling layer as the filler, and hydrophilic oleophobic filter screen and protection network are dredged to periphery parcel, and the mode of advancing out in beyond the filter core that obtains carries out oil water separation, not only can effectively hold back particulate matter and the great oil drop in the oil field output liquid, can also get rid of the emulsified oil in the oil field output liquid, guarantees simultaneously that the filter core is difficult for being polluted, and long service life.
(2) The utility model discloses do not utilize traditional membrane separation principle, the principle is held back to aperture physics promptly, but adopts breakdown of emulsion mediation principle, has got rid of the emulsified oil that is difficult to detach in the oil field output liquid effectively, has effectively realized oil-water separation's preliminary treatment under the condition of great oil content, great throughput and short time at oil field output liquid to guarantee simultaneously that the filter core is difficult for being contaminated increase of service life.
Drawings
FIG. 1 is an external structural diagram of a filter element for oil-water separation pretreatment.
Fig. 2 is a schematic cross-sectional view taken along line a-a in fig. 1.
Fig. 3 is a schematic cross-sectional view at B-B in fig. 2.
FIG. 4 is an external structural diagram of a part of an inner cylinder structure in the filter element for oil-water separation pretreatment.
FIG. 5 is a schematic perspective view of the oil-water separation assembly.
FIG. 6 is a schematic bottom view of the oil-water separation assembly.
FIG. 7 is a schematic front view of the oil-water separation pretreatment apparatus.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments.
EXAMPLE 1 Filter element for oil-water separation pretreatment
The invention provides a filter element for oil-water separation pretreatment, which comprises a filter element cylinder 101, an upper sealing cover 102 and a lower sealing cover 103 as shown in figure 1. The upper sealing cover 102 covers the top of the filter element cylinder 101, the lower sealing cover 103 covers the bottom of the filter element cylinder 101, and the lower sealing cover 103 is provided with a liquid outlet 104. A section of threaded connector 105 extends outwards from the top of the upper cover 102, so as to be connected with other components conveniently; a section of liquid outlet pipe 106 also extends outwards from the bottom of the lower sealing cover 103, and an O-shaped rubber sealing ring 107 is sleeved on the pipe body of the liquid outlet pipe, so that the liquid outlet pipe is conveniently connected with other parts; the wall of the liquid outlet pipe can also be provided with threads.
As shown in fig. 2, the filter element cylinder 101 is composed of a protective net outer cylinder 201, a hydrophilic oleophobic filter screen middle cylinder 202, a filling layer 203 and an inner cylinder 204 in sequence from outside to inside. The filling layer 203 is formed by stacking hydrophilic oleophobic glass fiber filter wires and oleophilic hydrophobic glass fiber filter wires; as shown in fig. 3, the hydrophilic oleophobic glass fiber filter and the oleophilic hydrophobic glass fiber filter are stacked around the inner cylinder; the hydrophilic oleophobic glass fiber filter wires are stacked to form a hydrophilic oleophobic glass fiber layer 301, and the oleophilic hydrophobic glass fiber filter wires are stacked to form an oleophilic hydrophobic glass fiber layer 302; the filling layer is formed by alternately stacking a hydrophilic oleophobic glass fiber layer 301 and a hydrophilic oily hydrophobic glass fiber layer 302. Each hydrophilic oleophobic glass fiber layer has a thickness of 0.5cm and a bulk density of 0.35g/cm3(ii) a Each oleophylic and hydrophobic glass fiber layer has a thickness of 0.5cm and a bulk density of 0.35g/cm3. The average diameter of the monofilaments of the hydrophilic and oleophobic glass fiber filter and the hydrophilic and oleophobic glass fiber filter is 15 mu m. The mass ratio of the hydrophilic oleophobic glass fiber filter wire to the hydrophilic oleophilic hydrophobic glass fiber filter wire is 1: 1.
The protective net of the protective net outer cylinder 201 is made of stainless steel, meshes are rhombic, the thickness is 2-5 mm, and the aperture of each mesh is 1-2 cm; the hydrophilic oleophobic filter screen 202 is made of stainless steel, and the aperture of the mesh is 30-50 meshes. In the invention, the middle cylinder and the filling layer of the hydrophilic oleophobic filter screen have the function of blocking larger oil drops and solid suspended matters in the oil field output liquid. The upper sealing cover is closed, and the lower sealing cover is only provided with a liquid outlet; the hydrophilic oleophobic filter screen, the hydrophilic oleophobic glass fiber filter wire and the oleophilic hydrophobic glass fiber filter wire can be directly purchased from the market, and can also be obtained by carrying out hydrophilic oleophobic or oleophilic hydrophobic treatment on the filter screen and the glass fiber filter wire by the conventional technical means. In addition, as shown in fig. 4, the inner cylinder 204 is provided with a plurality of water holes 401 for liquid to flow into and flow out from the liquid outlet 104.
The use method and the principle of the filter element for oil-water separation pretreatment are as follows: firstly, oil field produced liquid sequentially passes through a protective screen outer cylinder and a hydrophilic oleophobic filter screen middle cylinder of a filter element from outside to inside, so that part of larger oil drops and solid suspended matters are blocked outside the filter element and collide, combined and grow up with each other, and finally naturally float up under the action of buoyancy, so that the oil field produced liquid is discharged; then, the rest liquid enters the filling layer, and the rest of the small emulsified oil in the oil field output liquid is primarily cut, crushed, coalesced and grown by using the hydrophilic oleophobic glass fiber filter wire and the oleophilic hydrophobic glass fiber filter wire accumulated in the filling layer to form large oil drops which enter the inner cylinder together with water, meanwhile, the small oil drops in the output liquid are expanded on the surface of the oleophilic hydrophobic fiber, and the processed output liquid flows out from the liquid outlet to other subsequent processes together so as to be convenient for subsequent further oil-water separation treatment.
Example 2 oil-water separation pretreatment Filter element Assembly
The invention also provides an oil-water separation pretreatment filter element assembly, as shown in fig. 5, the oil-water separation pretreatment filter element assembly comprises 9 oil-water separation filter elements 501, a bracket 502 and a water collector 503; wherein, 9 filter cores are arranged in a circular shape, and the bracket 502 is provided with 9 connectors 504 for inserting and fixing the oil-water supply and water-separation filter cores. As shown in fig. 5 and 6, the water collector 503 is located below the bracket 502, and is provided with 9 water collecting branch pipes 505 and a main water collecting pipe 506 communicated with each branch pipe; each water collecting branch pipe is respectively communicated with the liquid outlet pipe 106 of the corresponding filter element 501, and further communicated with the liquid outlet 104. The bracket 502 is disc-shaped, the connectors are arranged in a ring shape, internal threads are arranged inside the connectors 504, the liquid outlet pipe 106 is inserted into the connectors 504, and the filter element 501 is fixed on the bracket 502 in a threaded connection mode. One end of the joint 504 is communicated with the liquid outlet pipe 106, and the other end is communicated with the water collecting branch pipe 505.
As shown in fig. 1, the cartridge includes a cartridge body 101, an upper closure 102, and a lower closure 103. The upper sealing cover 102 covers and buckles the top of the filter element cylinder 101, the lower sealing cover 103 covers and buckles the bottom of the filter element cylinder 101, and the lower sealing cover 103 is provided with a liquid outlet 104. A section of threaded connector 105 extends outwards from the top of the upper cover 102, so as to be connected with other components conveniently; a section of liquid outlet pipe 106 also extends outwards from the bottom of the lower sealing cover 103, and an O-shaped rubber sealing ring 107 is sleeved on the pipe body of the liquid outlet pipe, so that the liquid outlet pipe is conveniently connected with other parts; the wall of the liquid outlet pipe can also be provided with threads.
As shown in fig. 2, the filter element cylinder 101 is composed of a protective net outer cylinder 201, a hydrophilic oleophobic filter screen middle cylinder 202, a filling layer 203 and an inner cylinder 204 in sequence from outside to inside. The filling layer 203 is formed by stacking hydrophilic oleophobic glass fiber filter wires and oleophilic hydrophobic glass fiber filter wires; as shown in fig. 3, the hydrophilic oleophobic glass fiber filter and the oleophilic hydrophobic glass fiber filter are stacked around the inner cylinder; the hydrophilic oleophobic glass fiber filter wires are stacked to form a hydrophilic oleophobic glass fiber layer 301, and the oleophilic hydrophobic glass fiber filter wires are stacked to form an oleophilic hydrophobic glass fiber layer 302; the filling layer is formed by alternately stacking a hydrophilic oleophobic glass fiber layer 301 and a hydrophilic oily hydrophobic glass fiber layer 302. Each hydrophilic oleophobic glass fiber layer has a thickness of 0.5cm and a bulk density of 0.35g/cm3(ii) a Each oleophylic and hydrophobic glass fiber layer has a thickness of 0.5cm and a bulk density of 0.35g/cm3. The average diameter of the monofilaments of the hydrophilic and oleophobic glass fiber filter and the hydrophilic and oleophilic hydrophobic glass fiber filter are both 20 μm. The mass ratio of the hydrophilic oleophobic glass fiber filter wire to the hydrophilic oleophilic hydrophobic glass fiber filter wire is 1: 1.
The protective net of the protective net outer cylinder 201 is made of stainless steel, meshes are rhombic, the thickness is 2-5 mm, and the aperture of each mesh is 1-2 cm; the hydrophilic oleophobic filter screen 202 is made of stainless steel, and the aperture of the mesh is 30-50 meshes. In the invention, the middle cylinder and the filling layer of the hydrophilic oleophobic filter screen have the function of blocking larger oil drops and solid suspended matters in the oil field output liquid. The upper sealing cover is closed, and the lower sealing cover is only provided with a liquid outlet; the hydrophilic oleophobic filter screen, the hydrophilic oleophobic glass fiber filter wire and the oleophilic hydrophobic glass fiber filter wire can be directly purchased from the market, and can also be obtained by carrying out hydrophilic oleophobic or oleophilic hydrophobic treatment on the filter screen and the glass fiber filter wire by the conventional technical means. In addition, as shown in fig. 4, the inner cylinder 204 is provided with a plurality of water holes 401 for liquid to flow into and flow out from the liquid outlet 104.
EXAMPLE 3 oil-Water separation pretreatment apparatus
The invention also provides an oil-water separation pretreatment device, as shown in fig. 7, the oil-water separation pretreatment device comprises a shell 601 (i.e. a kettle body), an oil discharge port 602 and an exhaust port 603 are formed in the top of the shell 601, a pressure gauge 604 is installed, and large oil drops and solid suspended matters blocked by the outer cylinder of the protective net and the middle cylinder of the hydrophilic and oleophobic filter screen are discharged from the oil discharge port. The upper part of the shell is provided with a liquid inlet 605 (tangential inlet) and a reflux port 606, and is provided with a liquid level meter 607 and a thermometer 613; the oil-containing liquid discharged in the subsequent oil-water separation process can be returned to the oil-water separation pretreatment device through the return opening for secondary treatment. The lower part of the shell is provided with a liquid outlet 609, two sides of the shell are respectively provided with a hand hole 608, and the bottom of the shell is provided with a discharge pipe 610 for discharging slag; the liquid outlet 609 is used to discharge the liquid in the inner barrel 204.
The inside of the housing 601 is provided with an oil-water separation pretreatment filter element assembly 611, and the oil-water separation pretreatment filter element assembly 611 is fixed on the inner wall of the housing through a bracket. As shown in fig. 5, the oil-water separation pretreatment filter element assembly comprises 9 oil-water separation filter elements 501, a bracket 502 and a water collector 503; wherein, 9 filter cores are arranged in a circular shape, and the bracket 502 is provided with 9 connectors 504 for inserting and fixing the oil-water supply and water-separation filter cores. As shown in fig. 5 and 6, the water collector 503 is located below the bracket 502, and is provided with 9 water collecting branch pipes 505 and a main water collecting pipe 506 communicated with each branch pipe; each water collecting branch pipe is respectively communicated with the liquid outlet pipe 106 of the corresponding filter element 501, and further communicated with the liquid outlet 104. The bracket 502 is disc-shaped, the connectors are arranged in a ring shape, internal threads are arranged inside the connectors 504, the liquid outlet pipe 106 is inserted into the connectors 504, and the filter element 501 is fixed on the bracket 502 in a threaded connection mode. One end of the joint 504 is communicated with the liquid outlet pipe 106, and the other end is communicated with the water collecting branch pipe 505.
As shown in fig. 1, the cartridge includes a cartridge body 101, an upper closure 102, and a lower closure 103. The upper sealing cover 102 covers and buckles the top of the filter element cylinder 101, the lower sealing cover 103 covers and buckles the bottom of the filter element cylinder 101, and the lower sealing cover 103 is provided with a liquid outlet 104. A section of threaded connector 105 extends outwards from the top of the upper cover 102, so as to be connected with other components conveniently; a section of liquid outlet pipe 106 also extends outwards from the bottom of the lower sealing cover 103, and an O-shaped rubber sealing ring 107 is sleeved on the pipe body of the liquid outlet pipe, so that the liquid outlet pipe is conveniently connected with other parts; the wall of the liquid outlet pipe can also be provided with threads.
As shown in fig. 2, the filter element cylinder 101 is composed of a protective net outer cylinder 201, a hydrophilic oleophobic filter screen middle cylinder 202, a filling layer 203 and an inner cylinder 204 in sequence from outside to inside. The filling layer 203 is formed by stacking hydrophilic oleophobic glass fiber filter wires and oleophilic hydrophobic glass fiber filter wires; as shown in fig. 3, the hydrophilic oleophobic glass fiber filter and the oleophilic hydrophobic glass fiber filter are stacked around the inner cylinder; the hydrophilic oleophobic glass fiber filter wires are stacked to form a hydrophilic oleophobic glass fiber layer 301, and the oleophilic hydrophobic glass fiber filter wires are stacked to form an oleophilic hydrophobic glass fiber layer 302; the filling layer is formed by alternately stacking a hydrophilic oleophobic glass fiber layer 301 and a hydrophilic oily hydrophobic glass fiber layer 302. Each hydrophilic oleophobic glass fiber layer has a thickness of 0.5cm and a bulk density of 0.35g/cm3(ii) a Each oleophylic and hydrophobic glass fiber layer has a thickness of 0.5cm and a bulk density of 0.35g/cm3. The average diameter of the monofilaments of the hydrophilic and oleophobic glass fiber filter and the hydrophilic and oleophobic glass fiber filter is 15 mu m. The mass ratio of the hydrophilic oleophobic glass fiber filter wire to the hydrophilic oleophilic hydrophobic glass fiber filter wire is 1: 1.
The protective net of the protective net outer cylinder 201 is made of stainless steel, meshes are rhombic, the thickness is 2-5 mm, and the aperture of each mesh is 1-2 cm; the hydrophilic oleophobic filter screen 202 is made of stainless steel, and the aperture of the mesh is 30-50 meshes. In the invention, the middle cylinder and the filling layer of the hydrophilic oleophobic filter screen have the function of blocking larger oil drops and solid suspended matters in the oil field output liquid. The upper sealing cover is closed, and the lower sealing cover is only provided with a liquid outlet; the hydrophilic oleophobic filter screen, the hydrophilic oleophobic glass fiber filter wire and the oleophilic hydrophobic glass fiber filter wire can be directly purchased from the market, and can also be obtained by carrying out hydrophilic oleophobic or oleophilic hydrophobic treatment on the filter screen and the glass fiber filter wire by the conventional technical means. In addition, as shown in fig. 4, the inner cylinder 204 is provided with a plurality of water holes 401 for liquid to flow into and flow out from the liquid outlet 104.
The water collector main water collecting pipe 506 in the oil-water separation pretreatment filter element assembly 611 is communicated with the liquid outlet 609, so that the liquid in the inner barrel 204 flows out of the shell 601. An ultrasonic oscillation plate 612 is arranged below the oil-water separation pretreatment filter core assembly 611. The ultrasonic oscillation plate 612 is flatly fixed at the bottom of the shell 601, and the electric wires are led out from the pipe wall and externally connected. The ultrasonic vibration function of the ultrasonic vibration plate 612 helps prevent particulate impurities from clogging the filter element. The microbubble aeration device can be arranged below the oil-water separation pretreatment filter element component 611, and the amount and the speed of floating oil drops in oil field produced liquid can be increased.
The operation flow of the oil-water separation pretreatment device in treating the output liquid of the oil field is as follows: the oil field output liquid enters the interior of a shell of the oil-water separation pretreatment device through a liquid inlet, along with the continuous increase of the volume of the output liquid, the oil field output liquid gradually immerses a filter element in the shell, the liquid sequentially penetrates through a protective net, a hydrophilic oleophobic filter screen and a filling layer of the filter element, and under the condition that larger oil drops and solid suspended matters are blocked outside the filter element, other smaller emulsified oil and fine dispersed oil drops are primarily cut, crushed, coalesced and grown to form larger oil drops which enter an inner cylinder together with water and flow into a water collector from a liquid outlet, and then the oil-water separation pretreatment device flows out; oil drops collide, gather and merge on the outer surface of the filter element, naturally float through buoyancy, reach the top end of oil-water separation, are gathered and are discharged through an oil discharge port.
Application example 1
The filter element and the oil-water separation pretreatment device are applied to the oil-water separation treatment of the oil field output liquid, and the specific content is as follows:
jinxian 1-1 oil field oil-bearing stratum in Dongying group and Shahejie street group of ancient system, crude oil density: 0.93 to 0.99g/cm3The comprehensive water content reaches 63.6 percent, and the oil field production enters the middle and later stages of water containing. The original platform production sewage treatment system of the oil field mainly receives production water generated by a primary production separator, a secondary production separator and an electric dehydrator.
The application example takes the effluent of the primary production separator as the oil field output liquid to be treated, and the oil content is 600-900 mg/l; introducing the oil field produced liquid into an oil-water separation pretreatment device for oil-water separation treatment, and controlling the incoming liquid pressure and treatment capacity of the oil-water separation pretreatment device and the oil discharge frequency; the oil content of the inlet water and the oil content of the outlet water of the oil-water separation pretreatment device at different time points and the oil content of the collected oil are monitored, and the results are shown in the following table.
TABLE 1 oil-water separation pretreatment device for water inlet oil content and water outlet oil content at different time points
The oil-water separation pretreatment device can achieve the oil removal rate of more than 90% under the conditions of higher incoming liquid pressure, higher treatment capacity and pressure difference, the effluent water color of the oil-water separation pretreatment device is good through detection, the content of suspended matters is low, the oil-water separation pretreatment device can directly reach most of water injection quality standards of an oil field, and after the oil-water separation pretreatment device operates for 1 month, a filter element is not obviously polluted, and the stable operation state is still kept.
Claims (9)
1. The utility model provides a filter core for water oil separating preliminary treatment, includes the filter core section of thick bamboo, and the upper cover at filter core section of thick bamboo top is detained to the lid to and the lower closing cap of cover knot in filter core bobbin base portion, its characterized in that, the filter core section of thick bamboo by outer to interior include in proper order: the device comprises a protective net outer cylinder, a hydrophilic oleophobic filter screen middle cylinder, a filling layer and an inner cylinder; the filling layer is formed by stacking hydrophilic oleophobic glass fiber filter wires and oleophilic hydrophobic glass fiber filter wires; a plurality of water through holes are formed in the inner cylinder; and a liquid outlet is arranged on the lower sealing cover.
2. The filter element for the oil-water separation pretreatment as recited in claim 1, wherein the radius difference between the outer cylinder and the inner cylinder of the protective net is 20-80 mm.
3. The filter element for the pretreatment of oil-water separation according to claim 1, wherein the hydrophilic and oleophobic glass fiber filter is stacked to form a hydrophilic and oleophobic glass fiber layer, and the oleophilic and hydrophobic glass fiber filter is stacked to form an oleophilic and hydrophobic glass fiber layer; the filling layer is formed by alternately stacking hydrophilic oleophobic glass fiber layers and hydrophilic oily hydrophobic glass fiber layers.
4. The filter element for the oil-water separation pretreatment of claim 3, wherein each hydrophilic and oleophobic glass fiber layer has a thickness of 0.2-0.8 cm and a bulk density of 0.2-0.5 g/cm3(ii) a Each oleophylic and hydrophobic glass fiber layer has the thickness of 0.2-0.8 cm and the bulk density of 0.2-0.5 g/cm3(ii) a The monofilament diameter of the hydrophilic and oleophobic glass fiber filter wire is 15-25 mu m; the diameter of the single filament of the oleophylic and hydrophobic glass fiber filter wire is 15-25 μm.
5. The filter element for the oil-water separation pretreatment as recited in claim 1, wherein the thickness of the protective net outer cylinder is 2 to 5mm, and the aperture is 1 to 2 cm; the aperture of the middle cylinder of the hydrophilic oleophobic filter screen is 30-50 meshes.
6. The filter element for the pretreatment of oil-water separation as recited in claim 1, wherein a drain pipe extends outwards from the bottom of the lower cover; and a sealing ring is sleeved on the body of the liquid outlet pipe.
7. An oil-water separation assembly, characterized by comprising a plurality of filter elements for oil-water separation pretreatment according to any one of claims 1 to 6.
8. An oil-water separation pretreatment device, which is characterized by comprising a shell and a plurality of filter elements which are arranged in the shell and used for oil-water separation pretreatment according to any one of claims 1 to 6.
9. An oil-water separation pretreatment device, characterized by comprising a housing and the oil-water separation assembly of claim 7 disposed inside the housing.
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| CN202022632387.6U CN214327319U (en) | 2020-11-13 | 2020-11-13 | Filter element and assembly for oil-water separation pretreatment and oil-water separation device |
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| CN202022632387.6U CN214327319U (en) | 2020-11-13 | 2020-11-13 | Filter element and assembly for oil-water separation pretreatment and oil-water separation device |
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