SU1551394A1 - Filter for purifying petroleum-containing water - Google Patents

Abstract

The invention relates to filters for the purification of water from petroleum products and makes it possible to improve the quality of cleaning. The filter consists of a housing 1 with inlet and outlet nozzles in which filter layers are laid, the upper of which is made of hydrophilic granules with a granule size D = 0.07-0.2 mm and thickness B = (300-600) D. 2 Il.

Description

1

The invention relates to a device for purifying water by filtration and can be used in any industry that requires water purification from oil.

The aim of the invention is to improve the quality of cleaning.

FIG. 1 shows a filter, a longitudinal section; in fig. 2 is a graph of oil content versus layer thickness of hydrophilic granules.

The filter consists of a housing 1, a pipe 2 for supplying oil-containing water, a pipe 3 for draining the filtrate, a pipe 4 for supplying wash water, a pipe 5

an increase in resistance is accompanied by a slight improvement in purification capacity. Considering that an increase in resistance leads to an increase in pressure and a decrease in filter capacity, it is impractical to use the ratio, since it does not provide a significant improvement in the cleaning capacity.

The filter works as follows. 10 The oil-containing water enters through the nozzle 2 into the filter and passes through a layer of filter material. Purified water is discharged through pipe 3 to the consumer. Small particles of oil defordl drainage of wash water, pipe 6 are reconciled in the upper layer 9, enlarged

for air supply. In the lower part of the housing 1 there is a false bottom 7, on which a layer 8 of granulated filtering material, for example quartz sand, with a granule size of more than 0.5 mm is located. Layer 9 has a layer of 9 hydrophilic granules, for example, a layer of sieved sulfone coal. It was established experimentally that layer 9 should be performed with a grain size of 0.07– to improve the quality of cleaning.

and in the form of a drop, they are pushed by water into layer 8.

Larger particles of petroleum products cannot penetrate into the vapor space of layer 9 and are retained on the surface in the form of a film. The film of petroleum products forming on the surface of layer 9 contributes to the enlargement of small droplets of petroleum products, which, having reached a certain size, are detached from

0.2 mm, with the ratio of the thickness of the layer to the middle of this film and float to the top

him the diameter of the granules b / d 300-600.

According to the results of the experiments, graphs were constructed (Fig. 2). Analysis of the graph shows that with an increase in the ratio, i.e. with an increase in the thickness of the layer of filter material consisting of granules with sizes from 0.07 to 0.02 mm, there is an intensive decrease in oil content in the b / d value range from 150 to 600. In the value range, the oil content decreases slightly. The highest oil content is observed in the ranges of values. Therefore, to determine the thickness of the upper hydrophilic layer, the most rational lower limit value of the ratio is 300. Further, it follows from the graph that with increasing layer thickness, i.e. b / d ratios, an intensive increase in resistance is observed when the filtering material is soiled in all intervals of values, and in the interval of

filter.

When the saturation limit is reached, the filter is rinsed with a back flow of wash water sufficient to expand the layer 9. During this washing process, the oil products are partially removed from layer 8. Periodically, after 20-30 hours, air is supplied through pipe 6 for 1-2 minutes which displaces petroleum products from layer 8.

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Claims (1)

Invention Formula A filter for purifying oil-containing water, comprising a body and layers of granular filter materials located therein, the upper of which is made of hydrophilic granules, characterized in that, in order to improve the quality of cleaning, the top layer is made with the ratio b / d 300-600, where b - layer thickness; d is the average size of hydrophilic granules, equal to 0.07–0.20 mm. an increase in resistance is accompanied by a slight improvement in purification capacity. Considering that an increase in resistance leads to an increase in pressure and a decrease in filter capacity, it is impractical to use the ratio, since it does not provide a significant improvement in the cleaning capacity. The filter works as follows. 0 Oil-containing water enters through the nozzle 2 into the filter and passes through a layer of filter material. Purified water is discharged through pipe 3 to the consumer. Small particles of oil are deformed in the upper layer 9, are enlarged. are matched in the upper layer 9, enlarged and in the form of a drop, they are pushed by water into layer 8. Larger particles of petroleum products cannot penetrate into the vapor space of layer 9 and are retained on the surface in the form of a film. The film of petroleum products forming on the surface of layer 9 contributes to the enlargement of small droplets of petroleum products, which, having reached a certain size, are detached from this film and float to the top this film and float to the top filter. When the saturation limit is reached, the filter is rinsed with a back flow of wash water sufficient to expand the layer 9. During this process, the oil products are partially removed from the layer 8. Periodically, after 20-30 hours, air is fed through pipe 6 for 1-2 minutes which displaces petroleum products from layer 8. Invention Formula A filter for purifying oil-containing water, comprising a body and layers of granular filter materials located therein, the upper of which is made of hydrophilic granules, characterized in that, in order to improve the quality of cleaning, the top layer is made with the ratio b / d 300-600, where b - layer thickness; d is the average size of hydrophilic granules, equal to 0.07–0.20 mm. 29 ЈL EJE: C2 Ј Ü: sl “1-COITJ J-gosm -“ hd