SU1674896A1 - Separator for cleaning oil-containing water - Google Patents

Abstract

The invention relates to the purification of oil-containing water and can be used to clean oil-containing water on ships of drilling platforms of the oil-producing and oil-refining industry and other objects where waste water containing oil products is formed. The aim of the invention is to increase the separator cleaning capacity and increase life of the filter element The separator includes a housing, the filter element in the internal cavity of which is placed a continuous conical hydrocyclone, pipe inlet and the mixture being cleaned, tangentially located in the cavity of the liquid being cleaned, the outlet pipe of oil-containing products placed in the inner cavity of the hydrocyclone equipped with a metal mesh cone and installed with the possibility of axial movement. The inner cavity of the filter element is additionally connected with the recirculation cavity 2 2 or ё

Description

The invention relates to the purification of oily water and can be used for the purification of oily water on ships as well as in sewage treatment on drilling platforms of oil producing and refining industries and other objects where waste water containing petroleum products is formed.

The aim of the invention is to increase the cleaning capacity of the separator and increase the service life of the filter element

FIG. 1 shows a separator for cleaning oily water; a longitudinal section in FIG. 2, section A-A in FIG. 1

The separator has a filter element case 1 and a hydrocyclone 3. A conical hydrocyclone is placed inside the filter element 2 with a gap. The hydrocyclone case is a truncated cone with a small base facing upwards and installed with a radial gap between the inner surface of the filter element and the outer surface of the cone.

The separator has an inlet guide vane 4 with a pipe 5 for tangentially introducing an oil-containing mixture and a sludge trap 6 with a pipe 7, into which mechanical impurities enter. The pipe 8 for taking oil products, equipped with a receiving cone 9 from a metal mesh, is passed through the filter element,

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isolated from the cavity of purified water and has the possibility of axial movement of the internal cavity 10 of the filter element has in the upper part a pipe 11 for outputting a concentrated oil product, and in the lower part communicates with a cavity 12 of recirculation.

The recirculation cavity 12 in the housing 1 is separated by partitions 13 and 14 from the cavity of purified water and the cavity 15 of the mixture being cleaned and connected to the cavity 15 of the mixture being cleaned by the recirculation pipe 16.

The cavity 17 of the purified water is provided with a nozzle 18 for diverting water from the separator

Mechanical impurities are lowered into the sludge trap 6 through the holes 19.

The separator works as follows.

Water contaminated with oil products and mechanical impurities is tangentially supplied through pipe 5 into cavity 15 of the mixture being cleaned and then into guide device 4. placed in this cavity and representing a tangential injection device (mixture is twisted). Due to centrifugal forces, mechanical impurities are discarded. to the periphery, are concentrated at the side walls of the cavity of the mixture being cleaned and, under the action of gravitational forces, are lowered into the sludge collector 6 through the openings 19 provided for this in the wall area Partitioning areas From the sludge collector 6, mechanical impurities are discharged through pipe 7 to the outside of the separator. The swirling flow of the mixture being cleaned, partially freed from mechanical impurities, enters the hydrocyclone body 3, where as a result of centrifugal forces in the center of the flow lighter oil products are collected. Drops of petroleum products fall on the metal grid of the cone 9 are coalesced on it and entrained in the nozzle 8 of the outlet of oil products. Water containing fine petroleum product leaves the hydro cyclone 3 into the internal cavity of the filter element 2

The minimum clearance between the hydrocyclone body 3 and the surface of the filter element 2 is selected based on the condition that the flow rate is sufficient to flush the surface of the filter element of contaminants (taking into account the flow rate through the filter element and swelling of the filter element during operation). This gap is assumed to be 0.22-0.13 of the diameter of the inner cavity of the filter element 2. Larger droplets of oil product coalesce on the surface of the filter element and are carried away by the flow. By turning the flow

at the exit of the liquid from the hydrocyclone 3 into the internal cavity of the filter element, the largest drops of oil product are separated, collected in the upper part

filter element from where it is discharged through pipe 11 of oil product withdrawal Smaller drops of oil product are adsorbed by the pores of filter element 2 Purified water is forced through filter element

2, enters the cavity 17 of the purified water and is discharged through the pipe 18 beyond the separator Blend not passing through the filter element 2, together with the washed away from the inner surface of the filter element

by mechanical impurities is sent from the internal cavity of the filter element to the recirculation cavity 12 and further through the recirculation pipe 16 to the cavity of the mixture being cleaned. The advantages of the proposed separator as compared to the known one is that, due to the use of a hydrocyclone, the mixture is cleaned from the main part of petroleum products and solids thanks to flush

a significant amount of oil particles from the surface of the filter element is more slowly saturating it with oil, due to the suction of oil from the upper part of the internal cavity of the filter element, the saturation of the filter element with oil products slows down

Claims (1)

Invention Formula 1 Separator for cleaning oil containing water. comprising a housing divided by a partition on the cavities of the mixture being cleaned and purified water, a coalescing filter element placed in the cavity of the purified water and an internal cavity connected to the cavity of the mixture being cleaned, the inlet pipes of the mixture being cleaned, the output of the oil product and purified water characterized in that increase the life of the filter element. it is equipped with a straight conical hydro cyclone mounted inside the filter element and a horizontal partition installed above the cavity 0 of the mixture with the formation of a recirculation cavity, which communicates with the internal cavity of the filter element and through the pipe with the cavity-cleaned mixture while tangentially entering the mixture to be cleaned 5 is located in the cavity of the mixture being cleaned and the oil outlet pipe is placed in the inner cavity of a hydrocyclone 2 Separator pop1 characterized by the fact that the outlet of petroleum products it is provided with a cone of metal mesh and is mounted with the possibility of axial movement. 3 Separator pop 1. distinguished by. that it is equipped with a sludge tank. placed in the bottom of the case. eleven eight ten Fi, 1 FIG 2