Horizontal settling tank for separating oil-water emulsions

 

The invention relates to the oil industry, in particular to a device for outputting an intermediate layer of horizontal pressure tanks at the oil treatment plants. The device contains a horizontal settling tank, the input and output connections, the output device is an intermediate layer in the form of solid metal camera, fitted with a circulation holes that overlap the spring-loaded valves. The pistons of the pneumatic cylinders are installed perpendicular to the holes inside the chamber and rigidly fixed racks to its walls. The pistons are driven by air pressure from the compressor. The technical result consists in simplifying the design and improving reliability. 1 Il.

The invention relates to the oil industry, in particular to a device for outputting an intermediate layer of horizontal pressure tanks at the oil treatment plants.

There are various types of horizontal tanks (see kN. Loutskina, S. "the Collection and preparation of oil, gas and water transport". M., Nedra, 1972, S. 195). The use of known horizontal clarifiers allows mainly to solve the problem Podgainy device to output the intermediate layer.

To maintain the normal process mode of operation for the preparation of oil usually persistent intermediate layers of these tanks periodically or continuously discharged into the oil trap or specially allocated for this purpose the vessel where they are stored for a long time and which, after additional processing of the demulsifier back in the "head" of the technological process of oil treatment. And this in turn leads to periodic deterioration of the quality of produced oil.

The presence in the oil emulsion iron sulfide and other solids, and nedorazvdannoe fine part of the emulsion leads to the formation and accumulation in the sump intermediate interfacial layer, representing a stable and complex dispersed system, which prevents the separation of produced water and oil. The presence in the composition of the oil emulsion iron sulfide not only complicates the process of demulsification, but also causes increased corrosion horizontal clarifiers and communications, as well as increases the amount of oil waste oil treatment plants. All of this requires additional material costs as the evil in the result to the present invention is a horizontal settling tank (see patent RU 1820840, 01 D 17/04 "Apparatus for joint training of oil and water", publ. B 21, 1993), containing a capacitor, the input and output connections, the output device is an intermediate layer, and a device for outputting the intermediate layer consists of two partitions, attached obliquely to the walls of the vessel with the formation of a camera and made of sections located at a distance from one another, each section is equipped with the axis of the counterweight and flap, made with the possibility of overlap of the distance between the partition walls. The sump is equipped with a hydraulic support-lift mounted for movement from horizontal to inclined and provided with a blowing device located between the partitions.

The known device for the preparation of oil provides for the conclusion of the intermediate layer from the settling tank at its inclined position by blowing, for example, oil and gas.

A disadvantage of the known device is that the tank must be permanently fixed water level. The change in water level will lead to the displacement of the intermediate layer, which cannot be captured by the device to output the intermediate layer.

Nedostupnogo when lifting the tank, as the sump requires a lifting device for blowing the intermediate layer when its tilted position.

In addition, to raise the sump (oil treatment plants are used in most large tanks with a volume of 200 m3in the downward position the need for special lifting devices, which are complex and expensive, requiring special maintenance.

The aim of the invention is the reduction of material costs, how to prepare the oil, and technological processes associated with the output of the intermediate layer from the settling tank for separating oil-water emulsions by simplifying the design of the sump and improve reliability.

This goal is achieved by the described horizontal settling tank for separating oil-water emulsions, comprising a housing, input and output connections, as well as a device for outputting an intermediate layer.

What's new is that the output device is an intermediate layer made of solid metal camera, rigidly fixed to the horizontal walls of the tank and located along the inner generatrix, outside of the zone of turbulent flow, when eaname when forward movement of the pistons of pneumatic cylinders installed perpendicular to the circulation holes inside the metal chamber and rigidly fixed racks to its walls, and pistons are driven by the air pumped by the compressor.

From available sources, the patent and scientific literature we are not aware of the claimed set of distinctive features. Therefore, the proposed device meets the criterion of "significant differences".

The drawing shows a schematic section of a horizontal tank with a device to output an intermediate layer.

The device contains a horizontal settling tank 1 for separating oil-water emulsions, input 2 and output 3, 4, 5 nozzles, a device 6 for outputting the intermediate layer 7 made in the form of solid metal camera, rigidly fixed to the horizontal walls of the tank 1 and is located along the inner generatrix, outside of the zone of turbulent flow, with a solid metal chamber 6 from the bottom and the top is fitted with a circulation hole 8, which overlap the spring-loaded valve 9 when the translational movement of the pistons 10 of the pneumatic cylinder 11, installed perpendicular to the circulation holes 8 within the e by air pressure, pumped by the compressor 13.

The principle of operation of the device combined with the way of specific performance.

For example, water-oil emulsion density 940 kg/m3and a temperature of 10oWith and entered into the reagent-demulsifier is fed through pipe 2 into the lower portion of the horizontal sedimentation tank 1 under layer separated produced water 14. Oil under gravity passes through the lower and upper circulation hole 8 in the upper part of the horizontal sedimentation tank 1 and is derived from it through pipe 3, and the separated produced water 14 is accumulated in the lower part of the horizontal sedimentation tank 1 and is continuously discharged through the pipe 4. The level of separated water is controlled by means of automation and rests on the bottom plane of the device 6 for outputting the intermediate layer 7.

Over time, accumulating the intermediate layer 7 reduces the efficiency of horizontal settling tank 1. To output the intermediate layer 7 first overlap circulation hole 8 spring-loaded valve 9 by supplying air pressure through air line 15 with the aid of the compressor 13. Upon completion overlapping circulation hole 8 opens the check valve 16, and isntalling sedimentation tank 1 compressor 13 is turned off and closes the check valve 16, preventing the escape of exhaust fluid in the compressor 13, and the stretching of a spring (not shown) that are installed inside the pneumatic cylinder 11 as a mechanism of reverse action, open, returning the valve 9 to its original position, while the circulation hole 8 is opened and restored normal operation horizontal sedimentation tank 1.

Technical and economic efficiency of the proposed horizontal settling tank for separating oil-water emulsion is formed by simplifying its structure, as well as improve the reliability of its operation and continuity of the technological process of separating oil-water emulsions, i.e., the proposed design of the sump is relatively simple, reliable and convenient in operation. This significantly reduces the time of process operation and reduced labor intensity when conducting this process, and improves the safety of personnel and reduced material costs of producing oil.

Due to the design of horizontal settling tank for separating oil-water emulsions the possibility of the intermediate layer in the product oil is excluded.

 

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