SU552305A1 - Device for treating wastewater containing petroleum products, fats, and slurry - Google Patents

Description

(54) DEVICE FOR CLEANING WASTE WATER CONTAINING PETROLEUM PRODUCTS, FATS AND WEIGHTS

The known device has the following disadvantages.

Perforated pipes for entering the air-water mixture are unreliable in operation due to clogging of the filter charge layer during the washing of the filter.

The pipes do not provide good air dispersion and its uniform distribution over the flotation cell area, which reduces the effect of cleaning with pneumatic flotation.

During operation, the uniformity of the distribution of the water-air mixture or air is further deteriorated due to clogging and corrosion of the perforated pipes under the action of the source water.

Uneven distribution of wastewater by flotation cell area. These disadvantages reduce the effectiveness of wastewater treatment.

In addition, the presence in the known structure of the additional chamber of the initial flotation reduces the number of the entire plant, and with a high diversion of wash water that takes place in the device, it is inevitable that the load in this chamber will be removed during the washing of the filter.

The purpose of the invention is to increase the efficiency of the cleaning process.

This is achieved by the fact that the perforated pipes for introducing the air / water mixture are placed above the wash water drainage system. It is advisable to perforated pipes to cover the elastic porous shell. In addition, the source waste supply unit must be made in the form of a tray with an inclined force-stabilizing wall.

Due to the specified placement of the perforated pipes for the introduction of the water-air mixture, the impact of their expansion during the washing of the filtering layer and the washing of the water is eliminated. The elastic shell of a corrosion-resistant material protects perforated pipes from corrosion and clogging, efficient air dispersion during pneumatic flotation, and contributes to the uniform distribution of the airborne mixture throughout the flotation cell area.

During pressure flotation, due to the presence of an inclined jetting wall, the initial effluents entering the tray change the flow direction and are evenly distributed over the entire cross section of the flotation cell, moving a thin layer in the horizontal direction.

FIG. 1 shows the device, a general view; in fig. 2 - perforated pipes for the introduction of the water-air mixture; in fig. 3 - feed unit for initial wastewaters.

The wastewater treatment device comprises a housing 1, a flotation cell 2, a fast filter 3 with a granular feed, a pipeline 4 for supplying the initial effluent, an assembly

supplying initial wastewaters 5, consisting of a tray 6 and an inclined jetting wall 7, a pipeline 8 for supplying a water-air mixture, perforated pipes 9 for introducing water into the pre-air mixture into a flotation cell, having round or slit openings I; a supply and drainage system for washing water, including a supply pipe 12, a drainage 13, a sand-chute 14, a pocket 15 for collecting washing water with a shortened separating wall 16 and a pipeline 17 for washing away water; filtrate drain pipe 18, foam tray 19

15 and a conduit 20 discharging it outside the structure.

The device works as follows. Wastewater is supplied through conduit 4 to tray 6, the inclined jetting wall 7 changes the direction of flow and a thin layer directs the wastewater to the flotation cell 2 to evenly distribute them over the entire area.

5 In the flotation cell, the wastewater is moved from top to bottom, subjected to flotation by the action of dispersed air coming in to meet and air-water mixture supplied through conduit 8 by means of perforated pipes 9. The air-circulating mixture or air is dispersed and evenly distributed on the area of the flotation cell porous elastic

5 by the shell I. Pass the flotation cell, the preliminarily treated wastewater is filtered through the loading of the fast filter 3 and removed through line 18 from the structure.

0 Pop-up contaminants accumulating on the surface of the flotation cell are diverted to tray 19 to collect foam and then removed through pipe 20 to the outside of the structure.

Wash water, and when necessary, compressed air is supplied to the loading of the fast filter by pipe 12 and distributed over its area by drainage 13. Waste

0, the wash water is removed from the structure through the wash water collection pocket 15 and the pipeline 17. The load carried out during the washings is delayed by a sand-chute 14 mounted on the separation

5 wall 16, and return back to the filter. Thus, the proposed device can be used in the reconstruction of existing high-speed filters in order to increase the efficiency of wastewater treatment and increase the duration of the filter cycle.

Using the device instead of the usual

three-stage wastewater treatment system

waters will achieve significant savings

operating costs and capital costs.

Claims (3)

1. Device for purification of waste water containing petroleum products, fats and slurry, including a quick filter placed one above the other in one root, a flotation cell equipped with non-perforated pipes for introducing a water-air mixture, an initial waste iodine unit, a system removal of wash water, characterized in that, in order to increase the efficiency of the cleaning process, perforated pipes are placed above the wash water removal system. 2. A device according to claim 1, characterized in that the perforated pipes are covered with an elastic porous shell. 3. A device according to claim 1, characterized in that the node of the source of wastewater is made in the form of a tray with an inclined alignment wall. Sources of information taken into account during the examination: 1. Wastewater treatment of a thermal power plant from petroleum products. Novokreshchenkov B. A., et al. - “Electric stations, 1973, d (L 9 2. US patent No. 343359, cl. 210-199, published 1968. Ml m im im t Yu G23 SJ // srig2  Uh / -one sixteen .f (Riga.Z