SU1000061A1 - Thin layer settler - Google Patents

Description

(54) THIN LAYER DRAWER

one

The invention relates to wastewater treatment devices and can be used in the iron and steel industry and other industries.

A radial sump is known, consisting of a cylindrical body, devices for supplying and discharging water and sediment and having a centrally driven farm for moving the sediment to the center of the sump 11.

The closest to the proposed technical essence and the achieved result is a thin layer sump, consisting of a body, devices for supplying contaminated water and draining clarified water, thin layer modules 2.

The disadvantage of this sedimentation tank is that thin-layer modules having a rectangular shape in plan cannot sufficiently tightly fill the cross-section of the settler, which has the form of a ring formed by the settler body and the central flocculation chamber. At the same time, it is necessary to take measures so that all the clarified water passes through thin-layer modules.

The purpose of the invention is to increase the efficiency of clarification and the capacity of the settler.

For this purpose, in a thin lagoon containing a housing, devices for supplying water of polluted water and removal of clarified water and thin layer modules located in the upper part, the upper part of the body is made rectangular and connected to the lower part by four conical surfaces; inclined pipes installed along the central generator of each conical surface with fan-shaped nozzles directed tangentially to the conical surface.

15

FIG. 1 shows a sump, incision; in fig. 2 is the same, section A-A in FIG. one; in fig. 3 - section B - B in FIG. 2; in fig. 4 is the same, section BB in FIG. one; in fig. 5 - pipe fragment with fan-shaped nozzles; in fig. 6 - sump housing in isometric.

Claims (2)

The sump consists of a housing 1, a pipe 2 for supplying contaminated water and a pipe 3 for draining clarified water. In the lower part of the housing there is a pipe 4 for removing the sediment. The upper part of the body is rectangular in plan, while the lower part is cylindrical. The upper and lower parts of the body are mated with four conical surfaces 5. The top of each such surface is located in one of the lower corners of the rectangular part of the settler, and the guide is an arc of the upper level of the cylindrical part. Inside the sump there is a vertical shaft 6 which drives the paddle truss 7. In the upper, rectangular part of the sump there are thin-layer modules 8 consisting of inclined channels. Modules can also be made from pipes or inclined plates. The modules are supported by supports 9. For installation of pipe 2 and shaft 6 in the layer of modules 8 there is an opening defined by shield 10. A flush pipe 11 is provided obliquely along the central generatrix of each of the conical surfaces 5 and is equipped with fan-shaped nozzles 12. The nozzles are mounted tangentially to the conical surface. The sump works as follows. The water in the housing 1 enters through the pipe 2 through the opening, fenced with a shield 10, large suspension falls to the bottom of the sump. Water with a smaller suspension suspended in it passes through the channels of the thin-layer modules 8. At the same time, suspended particles fall to the bottom of the channels, become larger, slide towards the flow of water, and ultimately settle to the bottom of the settler. The clarified water is discharged through the discharge pipe 3. During operation, some of the solid sediment can settle on conical surfaces 5. To flush the sediment, water is constantly or periodically supplied through the flush pipes 11. Due to the fan-shaped nozzles 12, the water stream is directed tangentially to the conical surface 5, washing a significant part of its area and washing away the accumulated sediment. The precipitate deposited on the bottom of the settling tank, by means of a truss, which is driven in rotation by the shaft 6, is moved to the sludge nozzle 4, from where it is removed. Making the sump body rectangular at the top and cylindrical at the bottom allows for the most dense filling of the cross section with thin-layer modules to ensure continuous removal of precipitate, which contributes to improving the efficiency of clarification. In this case, the total surface area of the precipitation and, consequently. the sump capacity can be increased by 1.5 times. The presence of flush pipes with fan-shaped nozzles helps to prevent accumulation of sediment in places of interface between circular and rectangular sections and to ensure the continued operation of the structure without reducing the efficiency of water clarification. Claims of the invention: A thin layer settler containing a cylindrical body, devices for supplying contaminated water and draining clarified water and thin layer modules located in the upper part, characterized in that, in order to increase the clarification efficiency and the capacity of the settler, the upper part of the body is rectangular and connected to the lower part of the intermediary. m of four conical surfaces, while the sump is equipped with inclined, installed along the central generatrix of each conical surface and pipes with fan-shaped nozzles directed tangentially to the conical surface. Sources of information taken into account during the examination 1. Yakovlev S. V., Karelin Ya. A., Laskov Yu. M. and Voronov Yu. V. Treatment of industrial wastewater, M., Gosstroyizdat, 1979, p. 63. 2. US patent No. 3615025, cl. 210-521,1971.  ar /} // with // 0 2 Soda / I / P FIG. I ff-s d-8 fug. four 1 ELU77 / 7L54: jy / fff ffjf fig-3 Fe / g