CN212018225U - Filtering air-floating type oil skimming type hydrocyclone - Google Patents

Abstract

The utility model discloses a filter air supporting formula oil skimming type hydrocyclone, including oil water separator, annotate vapour device and wash scale removal device, oil water separator includes interior casing, the shell body, overflow pipe and a feeding section of thick bamboo, interior casing has the interior chamber, the bottom is equipped with the outlet, the overflow pipe is located interior casing top, the feeding section of thick bamboo is located the shell body side, annotate vapour device and pass through pipeline and outlet connection, pour into the injected gas into oil field sewage in, wash scale removal device including washing the cavity, wash the baffle, wash water filling port and connecting hole, it is located between interior casing and the shell body to wash the cavity, the connecting hole is provided with a plurality ofly, the equipartition sets up in interior casing side, it is provided with a plurality ofly to wash the baffle, all articulate in the inside wall of interior casing, it sets up in the shell body bottom to wash the water filling, The air flotation separation phase combination technology solves the problems of internal descaling of the cyclone and blockage of the overflow pipe, and improves the separation efficiency of the cyclone.

Description

Filtering air-floating type oil skimming type hydrocyclone

Technical Field

The utility model relates to an oil-water separation technical field specifically is a filter air supporting formula oil skimming type hydrocyclone.

Background

As most oil fields in China enter the later stage of ultrahigh water content development, a plurality of new problems to be solved urgently appear in the field of oil field sewage treatment. The main expression is in four aspects: firstly, the treatment difficulty of the produced water of the oil field is increased, suspended particles in the water become thin, the content of SRB (sulfate reducing bacteria) exceeds the standard, the removal of oil and suspended matters in the polymer-containing sewage is more difficult, and the prior art has poor adaptability to the change, so that the qualification rate of the treated water is reduced; secondly, the water quality standard of the injected water is improved, and as the second and third encryption wells are built and put into production, the thin and poor oil layer is put into development, the proportion of the deeply treated water in the injected water of the oil field is increased, and higher requirements are provided for the water quality of the injected water of the oil field; thirdly, the sewage treatment cost is increased, the development benefit becomes worse in the later stage of the ultra-high water content of the old oil field, the sewage treatment process is required to be simplified, and the ground treatment cost is reduced so as to ensure the overall development benefit of the oil field; fourthly, environmental protection is increasingly paid attention, how to reasonably allocate water quantity, ensure the sampling and injection balance of sewage and avoid the problem that the discharge of the sewage becomes important at present.

The hydrocyclone is a common oil-water separation device, and utilizes the centrifugal force generated by the rapid rotation of fluid in a vortex cavity to enable a water phase with higher density to flow outwards, oil drops with lower density move to an inner ring and are gradually aggregated into oil drops with larger particle size through collision, and finally, the oil drops float upwards to realize separation. When the density difference of oil and water is small, the difference of centrifugal force generated by the oil phase and the water phase in the cyclone is not large, so that the oil and water are difficult to separate; further, as the amount of the treatment liquid increases, the shearing force generated by the rotation becomes too large, and the oil droplets are easily broken into smaller minute droplets, thereby decreasing the efficiency of oil-water separation. Therefore, in order to enable the produced water to reach the discharge standard, a more efficient and environment-friendly oil-water separation technology is urgently needed.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a filter air supporting formula oil skimming type hydrocyclone adopts centrifugal separation, air supporting separation to combine the technique, through the initial separation of big oil drop and aqueous phase, air supporting separation, simplifies sewage treatment process flow to obtain higher separation efficiency and effect, set up simultaneously in the swirler and wash the scale removal device and set up the bubble thorn in the overflow pipe, solved the problem and the overflow mouth jam problem of the inside scale removal of swirler.

The utility model discloses a filter air supporting formula oil skimming type hydrocyclone, including oil water separator, notes vapour device and washing scale removal device, oil water separator includes inner shell, shell body, overflow pipe and feed cylinder, the inner shell has the interior chamber, and the bottom is equipped with the outlet, is used for discharging the water of separating, the overflow pipe sets up in the inner shell top for discharge the light phase oil of separating, the feed cylinder sets up in the inner shell side, is used for inputing oil field sewage to the interior chamber in, outlet, overflow pipe and feed cylinder all extend to outside the shell body, the feed cylinder is equipped with the feed inlet that is used for being connected with the pipeline; the steam injection device is connected with the water outlet through a pipeline and is used for injecting injected gas into oilfield sewage in the inner cavity and accelerating oil-water separation in an air flotation mode; wash scale removal device including washing the cavity, washing the baffle, washing water filling port and connecting hole, it is located between interior casing and the shell body to wash the cavity, the connecting hole is provided with a plurality ofly, and the equipartition sets up in interior casing side for high-pressure clear water gets into interior cavity by washing the cavity when washing swirler, it is provided with a plurality ofly to wash the baffle, all articulates in the inside wall of interior casing for open or close the connecting hole, wash the water filling port and set up in the shell body bottom, inject high-pressure clear water to washing the cavity through washing the water filling port.

Furthermore, the area of the flushing baffle is larger than that of the connecting hole, so that the flushing baffle can be opened towards the inner cavity of the cyclone in a one-way mode when opened.

Further, the washing baffle is a light metal sheet, the number of the washing baffle is 12, and the maximum opening angle of the washing baffle is 45 degrees. The light metal sheet is adopted, in the separation process, liquid in the inner cavity of the cyclone generates pressure on the outer side surface of the flushing baffle plate, so that the flushing baffle plate is tightly attached to the inner wall of the inner cavity of the cyclone, the aim of sealing work is fulfilled, in the flushing and descaling process, high-pressure clean water generates pressure on the outer side surface of the flushing baffle plate, so that the flushing baffle plate is easily flushed by the high-pressure clean water, and dirt in the cyclone is conveniently cleaned.

Furthermore, the inner wall of the overflow pipe is also provided with bubble removing pricks which are vertically and uniformly distributed and used for pricking bubbles in liquid flow, so that the flowing space in the overflow pipe is enlarged, and liquid flow blockage is relieved.

Further, the bubble removing pricks are cones with the height of 1cm and the top angle of 60 degrees.

Further, the bottom of the inner shell and the bottom of the outer shell are flush, and the top of the inner shell is lower than the outer shell.

Furthermore, the oil-water separation device further comprises a liquid level automatic control system, wherein the liquid level control system is electrically connected with the liquid level control valve, and the liquid level control system controls the opening and closing of the liquid level control valve.

The utility model has the advantages that:

1. the utility model discloses use whirl water oil separating technique as the owner, assist the air supporting and select water oil separating technique, had both centrifugal separation, the advantage of air supporting separation, when through swirler separation oil, water, inject the bubble by the lower part outlet through annotating vapour device, the bubble combines together with oil drops, the ascending migration process of oil drops is accelerated, also can bring the oil drops that the particle size is small and difficult to separate into the core department simultaneously, realize the synergistic effect of air flotation and cyclone separation, thereby reach the high-quality high-efficient ground separation of profit;

2. aiming at the defects that the inside of the cyclone is easy to scale and difficult to descale, a mode of flushing and descaling is provided to change the defect, a flushing baffle is arranged on the inner wall of an inner chamber of the cyclone, a connecting hole for the inner chamber and a flushing chamber is formed in an inner shell, the flushing baffle is pushed open by utilizing high-pressure clean water injected into the flushing chamber, and the purpose of descaling the cyclone is achieved by utilizing the shaking of the flushing baffle and the impact of the high-pressure clean water;

3. bubble removing thorns are arranged on the inner wall of the overflow pipe, and the bubbles in liquid flow flowing out of the overflow pipe are removed by utilizing sharp needle thorns, so that the flow area in the pipe is increased, and the common blocking condition in the overflow port at the top is relieved;

4. the cyclone separator has the advantages of simple and reasonable structural design, convenience in operation, capabilities of containing technologies such as cyclone and air flotation, small occupied area and improvement on the separation efficiency of the original cyclone, and the combination is carried out according to different technical characteristics.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of the injection gas of the middle steam injection device of the present invention;

FIG. 3 is a schematic view of the present invention for removing blisters;

fig. 4 is a schematic view of the device for washing and descaling.

In the drawings: 1-inner shell, 101-inner chamber, 102-water outlet, 103-connecting hole, 2-outer shell, 3-overflow pipe, 301-removing foam thorn, 4-feeding cylinder, 401-feeding hole, 5-flushing chamber, 6-flushing baffle, 7-flushing water injection hole, and 8-injecting gas.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-4, a filtering air-floating skimming type hydrocyclone is a single-cone hydrocyclone, the inlet is a tapered curved double-inlet structure comprising an oil-water separation device, a steam injection device and a flushing descaling device, the oil-water separation device comprises an inner shell 1, an outer shell 2, an overflow pipe 3 and a feeding cylinder 4, the inner shell 1 has an inner chamber 101, the bottom is provided with a water outlet 102 for discharging separated water, the overflow pipe 3 is arranged at the top of the inner shell 1 for discharging separated light phase oil, the feeding cylinder 4 is arranged at the side of the inner shell 1 for inputting oilfield sewage into the inner chamber 101, the water outlet 102, the overflow pipe 3 and the feeding cylinder 4 all extend out of the outer shell 2, and the feeding cylinder 4 is provided with a feeding port 401 for connecting with a pipeline;

the steam injection device is connected with the water outlet 102 through a pipeline, the injected gas 8 is injected into the oilfield sewage in the inner cavity, the water outlet 102 is also a steam injection port of the injected gas, the injected gas is combined with oil drops and suspended matters by utilizing the floating force of the gas moving to the liquid surface, the oil drops and the suspended matters in the sewage are brought into the top overflow pipe 3, the purpose of separation is achieved, and the oil-water separation is accelerated through a gas flotation mode;

wash the scale removal device including washing cavity 5, washing baffle 6, washing water filling port 7 and connecting hole 103, wash cavity 5 and be located between interior casing 1 and the shell body 2, connecting hole 103 is provided with a plurality ofly, and the equipartition sets up in interior casing 1 side for high-pressure clear water gets into interior cavity 101 by washing cavity 5 when washing the swirler, it is provided with a plurality ofly to wash baffle 6, all articulates in interior casing 1's inside wall, is used for opening or closing connecting hole 103, and the quantity and the position of connecting hole correspond with washing baffle 6, wash water filling port 7 and set up in shell body 2 bottom, inject high-pressure clear water to washing cavity 5 through washing water filling port 7.

In the embodiment, in order to ensure that the connecting hole of the inner shell is shielded and sealed by the flushing baffle in the oil-water separation process of the cyclone, the flushing baffle is flushed and opened by high-pressure clean water in the flushing and descaling process, the area of the flushing baffle is larger than that of the connecting hole, so that the flushing baffle can only be opened towards the inner chamber of the cyclone in a one-way manner when being opened, the flushing baffle adopts light metal sheets, the number of the flushing baffle is 12, the flushing baffle is 3cm long, 3cm wide and 0.5mm thick, the maximum opening angle of the flushing baffle is designed to be 45 degrees, the light metal sheets are adopted, liquid in the inner chamber of the cyclone generates pressure on the outer side surface of the flushing baffle in the separation process, so that the flushing baffle is tightly attached to the inner wall of the inner chamber of the cyclone, the purposes of shielding the connecting hole and sealing work are achieved, and the high-pressure, the washing baffle is easily washed away by high-pressure clean water, dirt on the inner cavity of the hydrocyclone falls off due to the movement of the baffle and the impact of water in the opening process of the washing baffle, and water flows out of the water outlet 102 at the lower part of the inner shell after washing, so that the dirt in the hydrocyclone is conveniently removed.

As shown in fig. 3, the inner wall of the overflow pipe 3 is further provided with bubble removing pricks 301 which are vertically and uniformly distributed at intervals, the bubble removing pricks are cones with the height of 1cm and the vertex angle of 60 degrees, and the bubbles existing in the liquid flow are pricked by using sharp-pointed pricks, so that the flow space in the overflow pipe is enlarged, and the liquid flow blockage is relieved.

In this embodiment, the bottom parallel and level of interior casing 1 and shell body 2, be convenient for erection joint annotate the pipeline of vapour device and drainage, drainage pipe way directly meets with the outlet, annotate vapour device pipeline and connect in the inside vapour of annotating of drainage pipe way lateral wall through the check valve, interior casing 1 top is less than shell body 10cm, shell body 2 bottom is to the top height be 60 ~ 70cm, the internal diameter is 30 ~ 40cm, interior casing 1 height is 50 ~ 60cm, the internal diameter is 25 ~ 35cm, 3 internal diameters of overflow pipe are 6cm, the feed inlet diameter is 7cm, the outlet internal diameter is 10cm, the big cone angle of tapered swirler is 15 ~ 25.

In this embodiment, the oil-water separation device further includes a liquid level automatic control system, a liquid level control valve is installed at the feed port 401, the liquid level control system is electrically connected to the liquid level control valve, the liquid level control system controls the opening and closing of the liquid level control valve through the connection and disconnection of current, that is, when the water level accumulated in the cyclone reaches a set maximum liquid level height, the liquid level control system controls the control valve, the control valve is an electric valve, and if the water layer reaches the set maximum liquid level height, the liquid level control system connects current to keep the valve in a closed state.

The utility model discloses a working process:

1. the oil-water separation working process comprises the following steps: oily sewage enters the inner cavity 101 of the cyclone from the feeding hole 401, the oily sewage rotates along the inner wall in the inner cavity 101 by utilizing the self kinetic energy of the oily sewage, oil and water with different densities are separated by utilizing centrifugal force, water with higher density rotates along the inner wall and flows to the lower water outlet 102, and the oily sewage flows with the injected gas 8 at the water outlet, so that oil molecules with lower density move to the overflow pipe 3 along with the rising gas, the purpose of further separating the oil and the water is achieved, and the further separated sewage is discharged from the water outlet 102. The oil molecules rising with the gas converge at the central position of the inner chamber 101 and move towards the overflow pipe 3. When the overflow pipe 3 is reached, a large amount of bubbles are generated due to flow impact, and the bubbles are removed by the bubble removing thorns 301 on the inner wall of the overflow pipe 3, so that the aim of relieving blockage is fulfilled. The utility model discloses utilize the dual separation of profit and overflow pipe defoaming characteristics, make the separation efficiency of swirler obtain improving, the oil-water separation effect promotes.

2. Washing and descaling: because the sewage is provided with a large amount of elements such as mineral substances, a large amount of water scale can be accumulated on the surface of the inner wall of the inner shell 1 of the cyclone after the cyclone works for a long time, so that the separation efficiency of the cyclone is greatly reduced. The utility model discloses the utilization is washed cavity 5, connecting hole 103, wash baffle 6, wash water filling port 7 and constitute and wash scale removal device, at the scale removal in-process, utilize the high pressure clear water by washing the injection of 7 departments of water filling port, get into and wash in the cavity 5, the high pressure clear water will wash baffle 6 and open 45 to interior cavity 101 inboard through connecting hole 103, through the impact force of articulated fixing on interior cavity 101 inner wall wash baffle 6 and wash out and high pressure clear water, reach the purpose of cleaing away incrustation scale on the inner chamber inner wall. Meanwhile, the area of the flushing baffle 6 is larger than that of the connecting hole 103, so that the flushing baffle can only be opened towards the inside of the inner cavity 101, and liquid leakage into the flushing cavity 5 during oil-water separation is prevented.

The utility model discloses use whirl water oil separating technique as leading, assisted the air supporting and select water oil separating technique, had centrifugal separation, the advantage of air supporting separation concurrently, reached higher water oil separating effect, the utility model has the advantages of the scale removal is convenient, area is little, and the treatment effeciency is high, and reliable operation, operation maintenance is simple, effectively prevents stifled etc. has improved the separation effect of oil in the oil field sewage, has complied with the oil field sewage discharge standard that constantly improves, has important meaning to the processing of oil field sewage.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims (6)

1. A filter air-floating skimming type hydrocyclone is characterized in that: the oil-water separation device comprises an inner shell, an outer shell, an overflow pipe and a feeding cylinder, wherein the inner shell is provided with an inner cavity, the bottom of the inner shell is provided with a water outlet used for discharging separated water, the overflow pipe is arranged at the top of the inner shell and used for discharging separated light-phase oil, the feeding cylinder is arranged on the side surface of the inner shell and used for inputting oilfield sewage into the inner cavity, the water outlet, the overflow pipe and the feeding cylinder all extend out of the outer shell, and the feeding cylinder is provided with a feeding hole used for being connected with a pipeline; the steam injection device is connected with the water outlet through a pipeline and is used for injecting injected gas into oilfield sewage in the inner cavity and accelerating oil-water separation in an air flotation mode; wash scale removal device including washing the cavity, washing the baffle, washing water filling port and connecting hole, it is located between interior casing and the shell body to wash the cavity, the connecting hole is provided with a plurality ofly, and the equipartition sets up in interior casing side for high-pressure clear water gets into interior cavity by washing the cavity when washing swirler, it is provided with a plurality ofly to wash the baffle, all articulates in the inside wall of interior casing for open or close the connecting hole, wash the water filling port and set up in the shell body bottom, inject high-pressure clear water to washing the cavity through washing the water filling port.

2. The filtered air-floating skimmer hydrocyclone according to claim 1, wherein: the area of the flushing baffle is larger than that of the connecting hole, so that the flushing baffle can be opened towards the inner chamber of the cyclone in a one-way mode when opened.

3. A filtered air-floating skimmer hydrocyclone in accordance with claim 2, wherein: the washing baffle is a light metal sheet, the number of the washing baffle is 12, and the maximum opening angle of the washing baffle is 45 degrees.

4. The filtered air-floating skimmer hydrocyclone according to claim 1, wherein: the inner wall of the overflow pipe is also provided with bubble removing pricks which are vertically and uniformly distributed and used for pricking bubbles in liquid flow, so that the flowing space in the overflow pipe is enlarged, and liquid flow blockage is relieved.

5. The filtered air-floating skimmer hydrocyclone according to claim 4, wherein: the bubble removing pricks are cones with the height of 1cm and the top angle of 60 degrees.

6. The filtered air-floating skimmer hydrocyclone according to claim 1, wherein: the bottom of interior casing and shell body is the parallel and level, and interior casing top is less than the shell body.

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