A device for the separation of emulsions

 

(57) Abstract:

The invention relates to techniques for the separation of immiscible liquids, in particular to devices for separating and deep dehydration emulsified hydrocarbon media with a different type of emulsions in a wide range of water content, and can be used for deep dehydration of crude oil and petroleum products in the oil and gas and petrochemical industries. The device includes a horizontal cylindrical body, vlagootvedeniya package, composed of a composition oleophilic and hydrophilic porous-cellular polymeric materials with a fixed porous cellular structure, laid transverse layers in the form of discs with a diameter greater than the internal diameter of the cylindrical body, overlying the working section of the device and located above the phase boundary, at an angle to the horizontal of not less than angle ettekanne fluid in the direction of a flowing stream. The technical result consists in increasing the efficiency demulsification. 1 Il.

The invention relates to techniques for the separation of immiscible liquids, in particular to a device for the separation and glodane, and can be used for deep dehydration of crude oil and petroleum products in the oil and gas and petrochemical industries.

A device for dewatering of crude oil and petroleum products, containing a filter element mounted in the housing at an angle of 30 - 60odepending on the viscosity of hydrocarbons, providing effective runoff water drops (Patent RU 2120323, class B 01 D 17/00).

The filter element rests on a blank wall, blocking thus all the free section of the apparatus, and includes at least three parallel inclined installed the filter layer. The first and last filter layers are formed of plates of porous foamed metal or alloy with a hydrophobic (oleophilic) properties, and the intermediate material, characterized by a hydrophilic properties, which is used as the porous-porous metal or alloy surface modified, three-dimensional grid of celluloid, tapes with glass beads or glass.

However, the described device is simple of construction, recommended for deep dehydration in varying degrees watered environments (newusa disadvantages.

Using the average (provided for coalescence of fine moisture held in the direction of flow through the fine-mesh metal material of the first layer) of the filter layer materials with hydrophilic underdeveloped surface, compared with the porous metal mesh, would contribute to a significant accumulation of moisture in this layer, because of the structure of the above hydrophilic materials rapid evacuation, it is difficult. The last filter layer with a hydrophobic surface will be similar to the first, which is delayed coarse moisture. In continuous mode of operation accumulated on the surface of the hydrophilic layer and held in place due to the forces of adhesion of the moisture is the easiest way should be evacuated in the settling zone of the apparatus through the open bottom of the middle filtering layer. The presence of an open surface in this part of the middle filtering layer, besides flooded to a certain depth in the water layer is settling zone, eliminates high-performance filter package in unstable state a clear separation of the phases (oil and water) in the settling zone of the device.

Presents the layout of Phil the STI, because this requires the ability to vary aceitoso and porosity of filtering and cholesterolic materials to the smallest limits. This deprived the porous cellular structure of the hard metal materials that do not have well-developed porosity, and to develop maximally effective surface due to the minimum size of the cells is difficult due to the peculiarities of the technology of production of this material.

Industrial practice the use of technology for dehydration is similar to filtering and cholesterolic devices shows that for high efficiency dewatering of crude oil and petroleum products under conditions of continuous supply of raw materials to high performance, this filter element does not match its purpose.

The closest in technical essence and the achieved result is a device for the separation of emulsions, comprising a cylindrical casing in which is placed vlagootvedeniya of the elastic porous foamed cellular polymeric material with a diameter greater than the inner diameter of the cylindrical housing (Patent RU 2056071, class B 01 D 17/04). The device is mounted to the base stand at an angle to moreprevious the phase boundary. The device provides deep dehydration of finely dispersed emulsions under conditions of continuous flow of dewatering environments, with large capacity, however, its use of hydrocarbon streams with a high content of water is limited by the performance of the device. The device is highly effective only in the mode of treatment, due to the fact that by tilting the device area collection kolestiramina moisture is concentrated in front of the package. In the dehydration of fuel flow with a large amount of water, including water-cut oil raw material, a significant number of detained package moisture with the rapid accumulation before her service to the level of drainage will prevent stabilization of the mode of receipt of the hydrocarbon phase to the package without mixing with drainage layer in violation of a clear phase boundary.

The present invention is intended to improve the efficiency and intensification of the process of demulsification watered hydrocarbon products and crude oil in its deep dehydration and desalting in the technology of oil as oil refineries and oil fields.

Specified technical RRA and the flow of hydrocarbon products, in a wide range of water cut, with large capacity continuous flow, the proposed device comprises a horizontal housing, which houses vlagootvedeniya package of elastic porous foamed cellular polymeric material laid transverse layers in the form of discs with a diameter greater than the internal diameter of the cylindrical body, while providing a location vlagotrebovatelnogo package above the phase boundary, and vlagootvedeniya package composed of a composition oleophilic and hydrophilic porous cellular materials with a fixed porous cellular structure, stacked layers, overlying the working section at an angle to the horizontal of not less than the angle of fluid in the direction of moving the thread:< / BR>
The drawing shows the device, General view, longitudinal section,

The proposed device comprises a cylindrical casing 1, connections: input emulsified flooded stream 2 via the distribution device 3, the output dehydrated product 4, the output of the aqueous phase 5, 6; vlagootvedeniya package 7, the drainage pockets 8, 9 and device for the automated removal of the aqueous phase 10, 11.

Mlagoo the different polymeric materials, the components of the optimal composition of materials with oleophilic and hydrophilic surface properties.

The disk diameter (filter layer) to eliminate gaps and parietal effects exceeds the internal diameter of the cylindrical body. The number of filter layers (disks), the total packet length, composition of materials with optimal characteristics of the main indicators of quality and surface properties are chosen according to the nature of the emulsified environment and the required depth of dehydration in terms of technology industries.

Disks of materials fit tightly without gaps between them. The first and last drives of the package is limited to metal bars. Pack evenly tightened with bolts and maintaining a porous cellular structure of the material, i.e., allowing deformation of the discs across the working section of the device in order to avoid channel flow of product.

If replacement is necessary, the package can be easily dismantled and re-assembled, and if necessary, regeneration, easily washed, blown air.

The choice of material, preferably porous-cellular foamed elastic polymers preimum composition of the package, due to the fact that these materials are highly effective coalescers the surface highly developed porous cellular structure and the presence of free volume within 92-95%. Production technology allows to form the desired aseistant and porosity to ensure effective destruction of hydrocarbon emulsions with any degree of water content in the prevalence of both hydrocarbon and water phases. The optimal selection of materials in the composition provides a minor hydraulic resistance when the package is in continuous mode cholesterola filtering on large capacity of threads in different modes according to the water resistant and fine emulsions of hydrocarbon environments.

The device operates as follows.

Flooded water-oil emulsion with different degree of dispersion and stability of the aqueous phase is fed through pipe input 2 and the distribution unit 3. When the volume filling device through olabilirim the surface properties of materials, evenly smachivayas hydrocarbon environment, filled the entire volume of the package 7, and displaces air from the dense porous cellular structure.

The main the tee to the bottom of the apparatus, the aqueous phase is accumulated in the catchment of the pocket 8, the interface which is regulated by the automated device 10 in height, providing the location vlagotrebovatelnogo package (for high efficiency demulsification) only in the carbon environment. Conclusion the aqueous phase is carried out through pipe 5.

Droplets of emulsified water, comparable in magnitude with the size of the mesh and then pass into the package structure, where the mutual collision and contact with highly developed surface of the material and the porous-cellular space is the coalescence of small and tiny drops of water.

On the hydrophobic surface of the material coalescence of the droplets occurs due to collisions within the porous-cellular space; droplets collide, wcreplays, and move along the stream.

When the contact layers of material with a hydrophilic surface, drops of water running across her thin film and wcreplays, roll down and move along the stream.

The output from the package selection of the material conditions of withdrawal of the material structure kolestiramina aqueous phase thin film, which slope downward descent and accumulate in the in the and phases is maintained lower riser package.

At the optimum layout of the composition materials of the package eliminates the gap drops and removing them from the flow deeply dehydrated fuel or raw oil in the settling zone of the apparatus. Vidalias package mainly in film mode, the water even with small areas of sediment in the apparatus is made with dehydrated fuel through the pipes o commercial product 4. In this mode of operation, the package offers a high performance of the device for variations of the water content of the emulsions in a wide range; no additional sludge, because the moisture has time to retire from service in the area of sludge, without disturbing the output mode of the dry product.

The location and the package only in emulsified (hydrocarbon) layer (i.e. above interface) allows you to provide stable and high-efficiency and high-performance operation devices in large-scale technologies, such as during dehydration and desalting where most of the processed medium is subject to change by the nature of the emulsion, depending on the properties of oils.

When testing the device in the technology of oil during its dehydration and desalination at the refinery for one level deep PR of 18% vol. to 0,03-0,05%, that was consistent with the standards for salinity. This is a very high efficiency demulsification, which is not allowed in the prototype. Expanded the limits of use of the device at high flows while facilitating the operation of the apparatus, due to the improvement of the drainage of the aqueous phase from the drainage pockets.

Thus, the proposed device with vlagootvedeniem service from the composite set of oleophilic and hydrophilic porous-cellular polymeric materials provides high efficiency demulsification process without additional sludge with deep dehydration high-performance continuous hydrocarbon product streams and crude oil. The unit is easy to service, if included in the technological scheme of plants provides a compact, reduces the cost of bulky equipment, energy and reagent reduces the level of corrosion activity of the processed media.

A device for the separation of emulsions, comprising a cylindrical casing in which is placed vlagootvedeniya package of elastic porous foamed cellular polymeric material, ologen and providing location vlagotrebovatelnogo package level, above the phase boundary, characterized in that the casing is installed horizontally, vlagootvedeniya package composed of a composition oleophilic and hydrophilic porous-cellular polymeric materials with a fixed porous cellular structure, stacked layers, overlying the working section at an angle to the horizontal of not less than angle ettekanne fluid in the direction of a flowing stream.

 

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4 ex

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