RU20309U1 - FLOTATION MACHINE FOR SEWAGE TREATMENT - Google Patents

Abstract

A flotation machine for wastewater treatment, including a casing, divided internally along the flow of water into flotation chambers with aerators inside them and a tertiary treatment chamber with a thin-layer clarification unit and a coalescence filter, with water inlet and outlet pipes and a foam gutter located on the outside of the casing, characterized in that for the destruction and transportation of the foam product, an ejection device is installed on the side of the foam trough, and the aerators are made of porous material, the upper part being Part of the surface of the aerators has holes with a diameter of 2-3 times smaller than the holes located in the lower part of the surface of the aerator.

Description

Authors: Xenophon B.C.

2001109858

Utility model - flotation machine for wastewater treatment

(MPKb with 02 F 1/24)

The proposed utility model relates to processes and apparatus for wastewater treatment.

Known methods and devices for wastewater treatment in most cases are quite complex and not always effective enough.

Known flotation machine for wastewater treatment, including a housing divided along the direction of water flow in the flotation chambers E 1, inside which aerators are installed, and after-treatment chambers with thin-layer clarification units and co-percent filters 1.

The specified flotation map has a significant drawback, consisting in the absence of a device for the destruction and transportation of foam.

To eliminate this drawback, a useful model of a new flotation machine is proposed.

The proposed flotation machine for wastewater treatment includes a housing divided internally along the flow of water into flotation chambers with aerators inside them and a after-treatment chamber with a thin-layer clarification unit and a coalescent () filter, and the inlet and outlet water pipes and foam are located on the outside of the casing the chute, while a distinctive feature of the flotation machine is that for the destruction and transportation of the foam product on the side of the foam chute, ejection devices are installed And diffusers made from porous material, wherein the upper portion has a surface aerators

Moskalev S.V.

Doole and L.A.

holes with a diameter of 2-3 times smaller than holes located in the lower part of the surface of the aerator.

The proposed flotation machine consists of a housing 1, on the upper side of which there is an inlet 2 and a cover 3, and inside a perforated pipe 4, located above the aerators 5, which are placed in 3 chambers 6 sequentially located along the direction of the water, separated by partitions 7, block thin-layer clarification 8, coalescence filter 9, level control device 10, and at the same time, an outlet pipe 11 is installed on the end surface of the housing, and a foam collecting chute 12 with an ejection device 13 is installed on the side (Fig. 1). The ejection device 13 includes an outlet part 14, a neck 15 with a suction hole 16 and an inlet pipe 17 (Fig. 2).

The proposed flotation machine operates as follows. The source wastewater enters through a hollow pipe 2 through a perforated pipe 4 into the first chamber 6, in which contamination, for example, surfactants, is flotated by air bubbles generated when compressed air leaves the openings of porous aerators 5. Use of porous aerators with small openings at the top and large below, it is possible to obtain small and large bubbles, which ultimately leads to coalescence of the bubbles1 and to an acceleration of the flotation process by about 1.5 times in comparison with the same process om a certain maschine. The resulting complexes "air bubbles - surfactants rise into the upper liquid layer with the formation of a foam layer. Next, the wastewater enters the 2nd and 3rd chambers 6, where the process of flotation of contaminants as in the 1st chamber. The pre-purified water from the chambers 6 is subjected to post-treatment in the thin-layer clarification unit 8 and the coalescent filter 9. At this stage, microbubbles of air are collected that carry contaminants adhering to them. Next, the clarified water is discharged from the floatation machine through the device for maintaining the water level 10 and the outlet pipe I 1.

Swallowed contaminants, such as surfactants, form a foam layer in the upper part of the housing 1, which is sucked in by the ejection device 13. The ejection process is as follows. Compressed air is supplied to the inlet pipe 17 from the compressor (not shown in Fig. 1-2), which, passing through the neck 15, sharply accelerates movements, which creates suction of the foam product through the hole 16. The foam captured by the air stream is also destroyed as a mixture of liquid and stream air is ejected from the outlet part 14 of the ejection device 13. The use of the ejection device allows for a short time interval to reduce the volume of the foam product by 5-10 times.

The advantage of the proposed flotation machine over analogues is the higher efficiency of wastewater treatment mainly from surfactants with the destruction of a stable foam layer of surfactants by ejection with a stream of compressed air.

Claims (1)

A flotation machine for wastewater treatment, including a casing, divided internally along the flow of water into flotation chambers with aerators inside them and a tertiary treatment chamber with a thin-layer clarification unit and a coalescence filter, with water inlet and outlet pipes and a foam gutter located on the outside of the casing, characterized in that for the destruction and transportation of the foam product, an ejection device is installed on the side of the foam trough, and the aerators are made of porous material, the upper part being Part of the surface of the aerators has holes with a diameter of 2-3 times smaller than the holes located in the lower part of the surface of the aerator.