SU929772A1 - Rack floatator for purifying waste water - Google Patents

Description

(3) HALF FLOTATOR FOR WASTEWATER TREATMENT

I

The invention is intended for sewage treatment by flotation and will find application in the pulp and paper and other industries.

A well-known multi-floater is known, comprising a housing in which inclined shelves are installed, between which purified water is supplied to the upper part of the inter-lane space. The clarified water is discharged at the bottom of each inter-shelf space. A scopa from each inter-shelf space is taken into the chamber above the shelves, where it is compacted and retracted from. flotation machine using a scraper conveyor l.

However, the presence of a special mechanism for transporting the osprey, the conveyor belt, complicates the design of the flotation cell. In addition, it is possible that the osprey is contaminated with oils to lubricate individual conveyor mechanisms, which makes it difficult to dispose of the osprey.

Also known is a shelf flotation machine for wastewater treatment, a housing with shelves inclined in it, a receiving chamber for collecting an osprey, a piping system for supplying treated water to the inter-shelf spaces, draining clarified water and an osprey 2.

However, the construction of the camera for collecting the osprey does not allow compaction., The latter due to its small volume and, consequently, the short residence time of the osprey in it.

In addition, the presence of a special pump for retracting an ospus complicates the design and increases energy costs.

The purpose of the invention is to increase the efficiency of the elution process by increasing the concentration of the osprey.

Claims (1)

This goal is achieved by the fact that a shelf flotation device for wastewater treatment, comprising a housing with shelf 392 inclined in it, a receiving chamber for collecting the osprey, a pipeline system for supplying the cleaned water to the inter-shelf space, draining the clarified water and the osprey, has preventing the osprey from sticking to the walls of the receiving chamber, made in the form of an apron of elastic material fixed along the perimeter of the side walls of the chamber, the osprey-air separation chamber installed on the pipeline for The osprey water, and an ejector mounted on the pipeline for supplying purified water in the lower part of the receiving chamber and connected to the osprey separation chamber from the air, the side walls of the receiving chamber being inclined. The drawing shows the flotation cell, a general view. . . . The flotation machine includes a housing 1, shelves 2 installed in it, receiving chamber 3 for collecting an osprey, pipeline system C for supplying the cleaned water to the inter-shelf spaces in the form of pipes with nozzles, draining clarified water in the form of longitudinal guides 5, installed along the inter-shelf space. Receiving chamber 3 for collecting an osprey has sloping side walls | and 5 to the top of which an apron 7 of elastic material is attached along the entire perimeter of the Chamber. The piping system for removal of compacted osprey is made in the form of pipes, one of which is connected to the float 8 located in chamber 3, and the others to the lower part of this chamber. On the latter, an ejector 9 is installed. In the system for removal of the osprey, there is a chamber 10 for separating the osprey from the air and a hydraulic shutter 11 interconnected by a tube 12. The chamber 10 is connected to the ejector 9 by a tube 13. A tube 1 leading to the float 8 10. The flotation cell works as follows. Purified water saturated with air in (individual cases and additives coagulant) is supplied by the nozzles to each inter-shelf space, and part of the water to the ejector 9- The flotation process takes place with the release of air bubbles. The latter bind suspended particles (fiber, filler, etc.). In the form of foam (cKonai) they float and enter chamber 3 through the upper part of the inter-shelf space. Water, as a more difficult medium, goes down the shelf and is discharged along guides 5 out. inter-shelf space. The scopes entering chamber 3 are settled and divided by. the clarified part. (decontat) and the suspension that floats to the surface of the camera. Air and water between suspended particles are displaced by surface tension forces. The compacted osprey is retracted through the osprey retraction pipe 14, which is under vacuum due to the ejector 9) which also creates a vacuum in pipe 13 in chamber 10 vi pipe I. In chamber 10, the osprey is separated from air. The air is sucked off by the ejector 9, and the scop enters through the pipe 12 into the hydraulic gate 11, from which it is disposed of for recycling. To eliminate adhesion of the osprey to the walls, which could lead to destruction of the osprey and contamination of the clarified water, these walls are made inclined. The latter ensures the collection of air in the pocket between the apron 7 and the walls 6, the oscillation of the apron 7 and thus prevents the osprey from sticking to the walls 6. In addition, this design provides a constant oscillation of the osprey surface and transporting the latter to the float 8 and the pipe I. Float 8 provides continuous removal of the osprey with fluctuations in the level of the osprey caused by an unspecified amount of water entering the purification system. Claims of the invention: Shelf flotation machine for wastewater treatment, comprising a housing with -i shelves inclined in it, a receiving chamber for collecting an osprey, a piping system for supplying treated water to the inter-shelf spaces, draining clarified water and an osprey characterized in that cleaning process by increasing the concentration of the osprey, it has a means to prevent the osprey from sticking to the walls of the receiving chamber, made in the form of an apron from elastic