SU1301443A1 - Coalescensing filter for cleaning waste water from petroleum products - Google Patents

Abstract

The invention relates to the treatment of wastewater, namely the treatment of wastewater from petroleum products. The aim of the invention is to increase the degree of purification of waste water from petroleum products. The coalescing filter includes a housing, a coalescence chamber 2, an upper grid 3, a lower grid 4 between which coalescing material 5 is placed, a settling chamber 6 for collecting oil products, a pipe 7 for draining oil products, a pipe 8 for introducing source water, a glass for changing direction and flow rate, mounted on the lower grid 4 with a protruding edge above the upper grid 3, the pipe 10 for draining purified water, placed coaxially with the glass 9 and lowered into it. I il. With S (L her 4 4 WITH

Description

This invention relates to the field of wastewater treatment, namely the treatment of wastewater from petroleum products.

The purpose of the invention is to increase the degree of purification of waste water from petroleum products.

The drawing shows schematically a coalescing filter for treating waste water from oil products.

The filter includes a housing 1, a coaalescence chamber 2 with an upper 3 and a lower 4 grids and a coalescing material 5 placed between them, a defending chamber 6 for collecting oil products with a branch pipe 7 for withdrawing oil products, an adapter 8 for introducing source water, a cup 9 for changing direction and flow rate, mounted on the lower grid 4 with the edge 3 protruding 25–30 mm above the upper grid, branch pipe 10 for draining purified water placed coaxially with the cup 9 and lowered into it 30–40 mm.

The ratio of the diameter (dn) of the nozzle 10 to the diameter (Dc) of the cup 9 is

0.7 - 0.9.

DC

Coalescing filter works as follows.

The source water to be purified is fed into the housing 1 from the bottom up through the nozzle 8 at a speed of 20-25 m / h and enters the coalescence chamber 2.

Here, coaetescence of small oil particles occurs as a result of their contact with the coalescing material 5.

After that, the flow of water with enlarged particles of petroleum products at the outlet of chamber 2 of the coalescence “hangs, i.e. changes the direction and speed of movement due to the fact that the tank 9 is mounted coaxially with the filter housing, mounted on the lower grid 4 and extending above the upper grid 3 edge.

As a result of a change in the direction and speed of the flow, the separation of petroleum products from water occurs due to the difference in the specific gravities of petroleum products and

water. At the same time, oil products that are lighter than water float up and enter the settling chamber 6, from where they are periodically discharged as they accumulate for recycling through pipe 7. Purified water is discharged through pipe 10 placed coaxially with glass 9 and lowered into it.

The decrease in the ratio-p below 0.7 and 0.65 decreases the degree of purification, since the gap between the cup 9 and the nozzle 10 becomes so narrow that it causes an increase in the flow rate. As a result, the oil products do not have time to completely separate from the water and a significant part of them is carried through the pipe.

An increase in the ratio above 0.9 to 0.95 results in the fact that the velocity and direction of the flow remain almost unchanged. Therefore, the degree of purification is also reduced.

Using the proposed filter

allows to increase the degree of wastewater purification from petroleum products, reduce the metal cost due to the compactness of coalescence and settling zones, reduce the cost of cleaning and utilize oil products separated from water.

Claims (1)

Invention Formula thirty 35 A coalescing filter for the treatment of waste water from petroleum products, including a housing, a coalescence chamber with nets and a coalescing material placed between them, a settling chamber, nozzles for introducing raw water and removing floating oil products, a body outlet pipe that is different that, in order to increase the degree of purification, the filter is equipped with a cup coaxially mounted on the lower grid of the chamber, the upper edge of which is located above the upper grid of the chamber, 40 that the lower end of the nozzle discharge purified water into a glass omitted and pipe diameter ratio dn discharge of purified water to the diameter DC glass is 0.70 , 90. DC