RU135525U1 - DEVICE FOR OIL SEPARATION WITH AN INCREASED CONTENT OF MECHANICAL IMPURITIES - Google Patents

Abstract

1. Device for the separation of oil with a high content of solids, including an inclined column, conventionally divided into an oil sludge and a water-sludge section, an oil supply pipeline consisting of an ascending pipeline, a stilling horizontal pipeline located above the upper point of the inclined column and equipped with a gas collector, a descending pipeline and a horizontal pipelines for introducing oil into an inclined column, as well as pipelines for the removal of gas, oil and water, and a pipe expander for gas sampling, located upstream relative to the inclined column, characterized in that along the lower generatrix of the inclined column in the water-proof section, a bubbler collector is installed on the supports, having perforated horseshoe bends and communicating through a connecting pipe with a pipe expander, the axial lines of the perforation holes of the horseshoe bends parallel to the axial line of the inclined column, and filters are installed on the water drain pipe. 2. A device for separating oil with a high content of mechanical impurities according to claim 1, characterized in that the water drainage pipe is connected to a drainage tank for draining water in case of stopping the operation of the device.

Description

The utility model relates to oil treatment facilities and can be used in systems for the collection and field preparation of oil well products.

A known method of transporting a gas-oil mixture, implemented using a device consisting of an end phase divider, divided by partitions into an oil and water section, bypass tubes and a tubular distributor for supplying gas released in the oil section of the device, under a layer of water, gas, oil and purified water and control valves [USSR Author's Certificate No. 1427146 cl. F17D 1/14, publ. 09/30/1988].

The disadvantages of this device include the fact that additional purification of water by bubbling is carried out only in part of the water section, also the known device is not intended for the preparation of oil with a high content of solids.

The closest analogue of the utility model adopted as a prototype is a separation unit containing an inclined column with a filter placed along its axis, divided into an oil-sludge and water-sludge section by a gas-liquid mixture supply pipeline, consisting of an ascending pipeline, a still horizontal pipeline located above the upper point of the inclined columns and equipped with a gas collector, a downward pipeline and a horizontal pipeline for introducing a gas-liquid mixture into an inclined Olona, gas discharge pipes, oil and water, and the pipe expander for pre-selection of gas located upstream of the oblique columns. To remove mechanical impurities, the inclined column, pipe expander and horizontal gas-liquid mixture inlet pipe are equipped with sand traps connected to a single prefabricated collector of mechanical impurities [RF Patent No. 2238783 cl. B01D 19/00, publ. 10/27/2004].

A disadvantage of the known device is the need to periodically stop the separation unit to clean the filter placed along the axis of the inclined column and remove deposits of mechanical impurities from the bottom of the inclined column. In addition, during operation of the installation, it is necessary to monitor the state of sand traps and to wash out mechanical impurities to prevent clogging.

The technical result of the claimed device is an increase in the efficiency of oil separation with a high content of mechanical impurities, an increase in the inter-cleaning period of the separation unit.

The specified technical result is achieved by the fact that in the known device for oil separation with a high content of mechanical impurities, including an inclined column, conventionally divided into oil sludge and water-sludge sections, an oil supply pipeline consisting of an ascending pipeline, a horizontal stilling pipe located above the upper point of the inclined column and equipped with a gas collector, a downward pipeline and a horizontal pipeline for introducing oil into an inclined column, as well as a pipe gas, oil and water pipelines and a gas expansion pipe extender located upstream of the inclined column, a feature is that along the lower generatrix of the inclined column in the water-separation section, a sparging manifold having perforated horseshoe-shaped branches and communicating through a connecting pipe is laid on the supports with a pipe expander, the axial lines of the perforations of the horseshoe bends parallel to the axial line of the inclined column, and on the pipeline water inlet filters installed. The drainage pipe is connected to a drainage tank to drain the water in case the device stops working.

The presence of a bubbler collector having perforated horseshoe-shaped bends and communicating through a connecting pipe with a pipe expander provides for bubbling of water, accompanied by a series of processes that increase the efficiency of oil separation with a high content of solids. When gas bubbles pass through a layer of water, they capture the oil particles contained in the water, with the formation of gas-oil spheres. The removal of gas and oil spheres into the oil sludge section of the device is accompanied by the transfer of captured oil particles and heavy hydrocarbon components contained in the gas into oil. Thus, during bubbling, there is a concurrent purification of the gas supplied to the bubbling from heavy hydrocarbon components.

Also, bubbling water prevents the formation of deposits of mechanical impurities on the walls of the inclined columns, due to the retention of mechanical impurities in the water in suspension, which allows to increase the inter-treatment period of the device. An additional result of bubbling water is the coagulation of suspended solids, which makes it possible to trap solids by a filter.

As a result of the above process, water containing a large amount of mechanical impurities, which are trapped outside the inclined column, is formed in the water-collecting section of the inclined column using filters installed on the water drain pipe, which simplifies the operation of the device. With a parallel arrangement of filters, they can be cleaned alternately, without stopping the operation of the device for oil separation.

The axial lines of the perforation openings of the horseshoe-shaped branches are parallel to the axial line of the inclined section, which helps to prevent them from becoming clogged by precipitated mechanical impurities in the event of a gas supply interruption for bubbling water.

The presence of communication between the bubbling manifold and the pipe expander through the connecting pipe ensures the necessary differential pressure of gas for sparging water, as a result of which the inventive device does not require the installation of additional equipment to create a gas pressure.

The presence of a drainage tank connected to the water drain pipe allows you to drain water containing a large amount of mechanical impurities in the event of a stop of the device, thus preventing clogging of the pipes of the inclined column and the formation of deposits.

The parameters of the bubbler collector are determined by calculation based on the conditions for uniform bubbling of the aqueous phase and retention of mechanical impurities in the aqueous phase in suspension while maintaining the separation efficiency of oil and water. The distance between the horseshoe-shaped bends is 20-30 cm, the diameter of the perforations is in the range of 0.5-3 mm, depending on the location on the bubble collector.

Figure 1 shows a schematic diagram of the inventive device, figure 2 is a cross section of an inclined column along aa.

The device contains an inclined column (1), conventionally divided into an oil sludge and a water-sludge section, an oil supply pipeline consisting of an upward pipeline (2), a horizontal soothing pipe (3) located above the upper point of the inclined column and equipped with a gas collector (4), a downward pipeline ( 5) and a horizontal pipeline (6) for introducing oil into the inclined column (1). Gas is sampled for sparging from a pipe expander (7), which communicates through a connecting pipe (8) with a sparger collector (9) laid on supports (10) in a water-proof section along the lower generatrix of the inclined column (1).

The bubbler manifold (9) has horseshoe-shaped bends (11) with perforations (12).

Discharge from the inclined column (1) of the separated flows is carried out respectively through the gas exhaust pipe (13), the oil drain pipe (14) and the water drain pipe (15). Filters (16) are installed on the water drain pipe (15). Also, the water drainage pipe is connected to a drainage tank (17) for draining water containing a large amount of mechanical impurities, in case the device stops working.

The device operates as follows.

Oil from the well with a high content of mechanical impurities enters the pipe expander 7, in which the pressure decreases to produce partially degassed oil and gas, part of which flows through the connecting pipe 8 to the bubbler manifold 9, and the other part is mixed with the gas released in the gas collector 4 soothing horizontal pipeline 3. Partially degassed oil after ascending pipeline 2, soothing horizontal pipeline 3 and descending pipeline ode 5 enters the horizontal conduit 6 in an inclined oil entering the column 1 where it is separated to gas, oil and water, with simultaneous deposition of mechanical impurity from petroleum.

Sparging of water is carried out by the flow of gas into the water through the perforations 12 of the horseshoe-shaped taps 11 of the bubbler collector 9.

Purified water from oil particles, containing a large amount of mechanical impurities, is discharged from the inclined column through the water discharge pipe 15, passes through filters 16, which are cleaned as a result of clogging, and sent for further preparation.

The oil separated from the mechanical impurities is discharged from the inclined column through the oil removal pipeline 14 and is sent for further preparation.

Gas purified from heavy hydrocarbon components is discharged from the inclined column through the gas exhaust pipe 13, is mixed with gas from the gas collector 4 and sent for further preparation.

In the case of stopping the operation of the device, water containing a large amount of mechanical impurities is discharged into the drainage tank 17 to prevent clogging of the pipes of the inclined column and the formation of deposits.

Claims (2)

1. Device for the separation of oil with a high content of solids, including an inclined column, conventionally divided into an oil sludge and a water-sludge section, an oil supply pipeline consisting of an ascending pipeline, a stilling horizontal pipeline located above the upper point of the inclined column and equipped with a gas collector, a descending pipeline and a horizontal pipelines for introducing oil into an inclined column, as well as pipelines for the removal of gas, oil and water, and a pipe expander for gas sampling, located upstream relative to the inclined column, characterized in that along the lower generatrix of the inclined column in the water-proof section, a bubbler collector is installed on the supports, having perforated horseshoe bends and communicating through a connecting pipe with a pipe expander, the axial lines of the perforation holes of the horseshoe bends parallel to the axial line of the inclined column, and filters are installed on the water drain pipe. 2. A device for the separation of oil with a high content of solids according to claim 1, characterized in that the drainage pipe is connected to a drainage tank to drain the water in case of stopping the operation of the device.

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