SU1480847A1 - Apparatus for jointly preparing water and oil - Google Patents

Abstract

The invention can be used to separate two immiscible liquids of different densities, in particular, for preliminary dehydration of oil. The purpose of the invention is to improve the quality of wastewater treatment by preventing the structural formations of the transition layer from escaping with oil and water. The device is a horizontal tank 1 with fittings for entering the emulsion 2, withdrawing the main amount of pre-dried oil 3 and part of the oil released during processing of the transition layer 4 and waste water 5. In the settling zone 8, the device is equipped with a hydrocyclone 9, the feed pipe 10 of which is located at the interface of the oil-water phase and consists of a suction 11 and a mixing 12 chambers. At the entrance to the suction chamber 11 of the supply pipe 10 is installed nozzles 13 of the pipeline 14 of the working fluid. 1 hp f-ly, 1 ill.

Description

The invention relates to apparatus for preliminary dehydration of oil with obtaining high-quality waste water in satellite fields,

The purpose of the invention is improving the quality of wastewater.

The drawing shows the apparatus, General view. 10

The device is a horizontal tank 1 with fittings for the input of the emulsion 2, the output of the main quantity is pre-dehydrated. oil 3, withdrawal of a part of the oil extracted during processing of the transitional layer 4, and waste water 5. The tank '1 is equipped with a transverse partition 6, dividing it into the receiving 7 and settling zone 8. In the sedimentation zone 8 of apparatus 20, a watercraft 9 is installed, the supply pipe 10 of which is located at the oil-water interface and consists of a suction 11 and a mixing chamber 12. At the entrance to the suction chamber 11 of the supply pipe 10, nozzles 13 of the pipeline 14 of the working fluid are installed.

A hydrocyclone 9 with a supply pipe 10 is mounted in an inclined shelf 30 15, is open at the top and is equipped with a drain pipe 16 and a discharge nozzle 17. The inclined shelf 15 covers the space between the side walls of the tank 1 with a hydrocyclone 9 35 and its supply pipe 10.

The apparatus. Works as follows.

A highly watered emulsion through 40 nozzle 2 is fed to the receiving zone 7 of the tank 1 and then to the settling zone 8, where the emulsion is gravitationally separated into oil and water. Oil through the nozzle 3 is removed from the apparatus. 45 As the device accumulates at the oil-water interface at the interface, the transition layer is received in the suction chamber 11 of the supply pipe 10. Under the influence of a stream of a working fluid stream (pre-dehydrated oil or heated wastewater), the transition layer is sucked into the watercraft 9, where by the action of centrifugal forces, it is destroyed and divided into three streams: a central stream containing a light liquid - dehydrated oil, a peripheral stream containing an intermediate product of the operation of a hydrocyclone partially dehydrated oil, and discharge stream containing waste water. The Central stream through the drain pipe 16, connected to the fitting 4, is removed from the apparatus. The swirling peripheral flow, rising between the inner wall of the hydrocyclone 9 and the outer wall of the drain pipe 16 into the oil zone of the apparatus, overflows over the top of the hydrocyclone, enters the inclined shelf 15 and flows along it to the level of the oil-water interface at the inlet of the supply pipe 10. Occurs returning a portion of the raw transition layer for reprocessing. The waste water released as a result of the hydrocyclone 9 is discharged to the bottom of the apparatus through the discharge nozzle 17. All waste water separated from the oil is collected in the lower part of the apparatus and through the nozzle 5 is discharged into the sewage water conduit (not shown).

The number of hydrocyclones with supply nozzles at the level of the oil - water interface installed in the apparatus depends on its size and performance, as well as on the physicochemical properties of the dehydrated emulsions, which determine the intensity of the formation of the transition layer,

The proposed design of the apparatus improves the quality of water purification due to the prevention of the removal of structural formations of the transition layer with water flows, which is ensured by the operation of the hydrocyclone with the placement of its feed pipe at the oil-water interface, which allows the newly formed, still unstable transition layer to be destroyed in the centrifugal force field , increases the efficiency of dehydration of highly watered oils, which is achieved by increasing the productivity of the apparatus by increasing its stability bility to fluctuations in loading caused by forcibly removing the transition layer to the interface between the phases and active treatment.

Claims (2)

Claim 1. The apparatus for the joint preparation of oil and water, containing a transverse partition dividing the capacity of the apparatus into the receiving and settling zones with the oil and water phases, characterized in that, in order to improve the quality of wastewater, it is equipped with settling zone with one or more hydrocyclones with a supply pipe located at the phase boundary and jq including a suction and mixing chamber, a working fluid pipe with a nozzle installed at the inlet to the suction chamber of the supply pipe, and a device your return of the peripheral flow of the hydrocyclone to the intake pipe, placed on the hydrocyclone. 2. The apparatus according to claim 1, characterized in that the peripheral flow return device is made in the form of an inclined shelf overlapping the space between the side walls of the tank, the hydrocyclone and its supply pipe.