SU1680252A1 - Settling tank for cleaning oil-containing water - Google Patents

Description

The invention can be used in the oil, oil refining industry and other sectors of the national economy, the wastewater of which is polluted with oil and oil products. Goal iso2

Breaching is an increase in the efficiency of purification of oily water. The sump includes a container 1, in the upper part of which is placed a layer of contact mass of oil 2, and cylindrical chambers 3 are immersed in it, the shells of which are made perforated. Each chamber is equipped with two stream-forming nozzles 4 and 5, one of which is installed in the upper bottom and the other in the lower one, and they are installed with an offset from the axis of the chamber in opposite directions. The sump has piping for the supply of source water and with the withdrawal of phases, the interface level controller. ~ 1il | C

1680252 A1

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1680252

The invention relates to water purification neftesoderzhzschih and can be used in the petroleum, petrochemical industry and other branches of the economy _g, waste water contaminated with oil and oil products.

The purpose of the invention is to increase the efficiency of water purification.

The drawing shows a sump, a longitudinal section with the scheme of circulating currents in the chambers.

The sump comprises a container 1 with a contact mass 2 from the oil and sunk into the layer of oil perforated chamber 3, in which the bottoms of the upper jet forming nozzle set 4 and the lower bottoms - additional jet forming nozzles 5. The nozzles 4 and 5 via a water-supply port 6 in communication with conduits ¹ 7 for the supply of source water. The tank 1 is equipped with a pipeline 8 for draining purified water and a device for oil evacuation 9, including an interphase level sensor and an actuator.

The sump works as follows.

The tank 1 is filled with water and a calculated amount of oil, and then the source water through pipelines 7, nozzles 6 and nozzles 4 and 5 are fed into perforated chambers 3. Nozzles 4 and 5 inside chambers 3 form water jets that form inside the cavity of the chambers 3 circulation currents ( see drawing). At the same time, in the zone of entry of the jets into chambers 3, a vacuum is formed and oil is sucked through the holes located in the immediate vicinity of nozzles 4 and 5. The oil involved in chambers 3 mixes with the source water, circulates repeatedly in the cavities of chambers 3 and through holes in the opposite nozzles 4 and 5 in the zone of chambers 3 enters the layer 2 of oil in the form of streams, i.e. the mixture of oil and water is squeezed into the layer of contact mass 2.

In the process of circulation, the source water is enriched with oil, comes into tight contact with it, in which the droplets and particles of oil present in the water are absorbed by the layer of contact mass 2. Next, the water in the form of droplets is deposited in the layer 2 of oil, and then

It is discharged through pipeline 8. In the process of sedimentation in oil, additional contact purification of water occurs. Caught oil from tank 1 is retracted using device 9, which includes an actuator and an interphase level sensor.

Due to the fact that the jet-forming nozzles 4 and 5 are installed alternately ΐ the upper and lower bottoms of chambers 3 in the oil layer 2 complex fluid circulation currents are formed, resulting in a decrease in the volume of stagnant zones in the contact mass layer 2, and therefore the utilization rate of the contact mass increases. masses, i.e. cleaning efficiency of oily water.

The use of the invention allows to increase the efficiency of purification of oily water due to the fact that in the perforated chambers powerful circulating currents are created, the volume of chambers is used most fully. The supply of water jets from above and below along the side walls of the chambers virtually eliminates countercurrent movements of circulating currents inside the chambers, since the jet from the nozzles contributes to the intensification of circulating currents due to the ⁷ appearance of the effect of pushing the fluid in the direction of circulation. Consequently, an increase in the power and intensity of circulating currents makes it possible to increase the survivability of the currents and the contact time of the water and oil being purified, as a result of which the quality of water purification is improved.

Claims (1)

Claim A sump for cleaning oil-containing water, including a container with a layer of contact mass of oil, perforated chambers with jet-forming nozzles, a pipeline with water supply pipes connected to the nozzles, a pipeline for draining purified water and an oil removal device, characterized in that, in order to increase efficiency water purification, each perforated chamber is equipped with an additional jet-forming nozzle connected to the water inlet pipe, 'one of the nozzles is located in the upper bottom, and ugoy - in the bottom, the nozzle mounted offset from the axis of the chamber in opposite directions.