RU133115U1 - FLOTATION CLEANING DEVICE - Google Patents

Abstract

1. A device for flotation wastewater treatment, comprising a cylindrical body with a nozzle for supplying a liquid to be cleaned, a central outlet pipe, an impeller, a foam collector, characterized in that the flotation agent supply device is located at the bottom of the body, above which is rotatable on a central outlet pipe blades are fixed around the vertical axis, while a holder with an annular collector equipped with a pipe for the foam and a foam mounted on it is fixed on the body a collector with floats that can reciprocate with respect to the central outlet pipe and rotate with it, and an impeller is fixed on the foam collector at its upper level, in addition, windows of the drainage of purified liquid are made in the central outlet pipe above the level of the annular collector, and the supply pipe the liquid being cleaned is located tangentially to the diametrical section of the body in the plane of the blades. 2. The device according to claim 1, characterized in that a reflector is mounted on the central outlet pipe located below the level of the annular collector. The device according to claim 1, characterized in that the bottom of the housing has a flushing nozzle.

Description

The utility model relates to devices for purifying industrial wastewater from suspended solids, oils, oil products, surfactants by flotation and can be used in the chemical, oil, oil refining industries.

Known devices for wastewater treatment by flotation, when flotation air is supplied by pressure to a special air distributor, and contaminating components in the form of foam are collected on the surface of the water and removed by a mechanism for raking foam (Engineering protection of surface water from industrial effluents. Textbook / D.A. Krivoshein, P.P. Kukin, V.L. Lapin et al. - M; Higher School. 2003-344 p. Fig. 6.12, p. 158) - [1]. Here, the supply of the flotation agent (water or air saturated with air) is carried out in the flotation chamber through special devices located at the bottom of the chamber. It can be nozzles, holes, porous plates, nozzles and other bubblers placed at the bottom of the chamber.

Known device copyright certificate No. 1361113. Flotator. Publ. bull. No. 47 dated 12/23/87 - [2] taken as a prototype. The flotator contains a sealed container with nozzles for supplying the initial mixture, discharge of clarified liquid, foam product and sludge, a vertical cylindrical partition installed coaxially above the bottom in the container, and a foam collector located below the upper end of the vertical cylindrical partition. A distribution device with perforations mounted in the lower part of the tank is connected to the pipe. An axial tube is placed in the tank, the lower end of which is attached to the pipe, and the upper is located inside the vertical cylindrical partition below its upper end. The foam collector is made in the form of a pocket, which is equipped with a vertical cylindrical partition on the outside around the perimeter, while the outer edge of the pocket is located at the level of the upper end of the axial pipe. A ring is installed on the axial pipe below the foam collector, the outer diameter of which is larger than the diameter of the vertical cylindrical partition. The foam collector is in communication with the nozzle by means of a pipe in which the impeller is rotatably mounted, and shaped blades rigidly connected by means of the rocker arm to the impeller are placed in the annular space between the foam collector and the vessel wall. The beam is mounted on bearings.

The disadvantage of the prototype: poor cleaning quality due to the lack of regulation of the scrapers in height depending on the liquid level and the level of thickness of the foam layer. As a result, the amount of foam removal will decrease, and with a significant thickness of the foam layer, it may fall into the drain pipe of purified water and the quality of cleaning will deteriorate.

The technical result, which is achieved by the claimed utility model, is to improve the quality of wastewater treatment by regulating the removal of foam from the surface of the water when the liquid level changes.

The technical result is achieved in that in a device for flotation wastewater treatment, containing a cylindrical body with a nozzle for supplying the liquid to be cleaned, a central outlet pipe, an impeller, a foam collector, new is that

at the bottom of the hull is a flotation agent switchgear,

above which on the Central outlet pipe, made with the possibility of rotation around a vertical axis, the blades are fixed,

at the same time, a holder is mounted on the body with an annular collector equipped with a foam outlet pipe and a foam collector mounted on it with floats that can reciprocate with respect to the central outlet pipe and rotate with it, and an impeller is fixed on the foam collector at its upper level, in addition, in the central outlet pipe above the level of the annular collector, windows for the removal of purified liquid are made, and the nozzle for supplying the liquid to be cleaned is located tangentially to the diametric th section of the body in the plane of the blades.

A reflector is mounted on the central outlet pipe, located below the level of the annular collector.

At the bottom of the housing there is a flushing nozzle.

The proposed utility model is presented in figure 1 - figure 3, where:

figure 1 - device for flotation cleaning (General view);

figure 2 - section A-A (view of the floats 10 and the impeller 8);

figure 3 - section B-B (view of the impeller 4, the distribution device of the flotation agent 3 and the tangential nozzle for supplying the cleaned liquid 14).

Here:

1 - housing

2 - pipe supply flotation agent,

3 - switchgear flotation agent,

4 - blades

5 - holders

6 - ring collector,

7 - foam collector,

8 - impeller,

9 - Central outlet pipe,

10 - floats,

11 - reflector

12 - drain pipe for foam,

13 - pipe outlet foam

14 - pipe for supplying cleaned liquid,

15 - nodes of rotation,

16 - flushing pipe

17 - window drainage of purified liquid.

A flotation cleaning device (flotator) is a cylindrical body 1 having a nozzle for supplying the liquid to be cleaned 14, located tangentially to the diametrical section of the body 1 in the plane of the blades 4. A central outlet pipe 9 with windows 17 is coaxially installed inside the body. The outlet pipe 9 is installed in nodes rotation 15 and has the ability to rotate from the incoming water flow through the nozzle 14 on the blades 4. On the Central outlet pipe 9 there is an annular reflector 11, which prevents bubbles from entering the window and 17 on the outlet pipe 9. In the lower part of the housing 1 there is a switchgear 3 with perforation and a pipe 2 for supplying the flotation agent (figure 3). At the bottom of the housing 1 there is a flushing nozzle 16. In the middle part of the housing 1 there are holders 5 to which an annular collector 6 for collecting foam is attached, connected to a pipe 12 with a nozzle for the removal of foam 13. A foam collector 7 is worn (installed) on the annular collector 6, having the possibility of vertical movement and circular rotation relative to the collector 6. The foam collector 7 is fixed with floats 10 located around the central outlet pipe 9 with the possibility of reciprocating movement along it, and has an impeller 8 at a level STORE (Figure 2).

The flotation cleaning device (flotator) works as follows.

The contaminated liquid to be cleaned is supplied through the nozzle 14 into the cavity of the housing 1. Due to the tangential location of the nozzle 14, the fluid flows onto the blades 4, and together with the central outlet pipe 9 they begin to rotate in the rotation nodes 15. Simultaneously with the liquid entering through the nozzle 2 flotation agent begins to be supplied to the distribution device 3. From the perforation openings of the device 3, gas bubbles begin to emerge and, emerging, capture the polluting components. During the lifting process, gas bubbles along with pollutants due to the action of centrifugal forces move to the wall of the housing 1. The presence of a reflector 11 eliminates the ingress of bubbles and pollutants into the drainage area of the cleaned liquid and window, and then purified water is discharged through the drain pipe 9. The foam product concentrated on the surface of the liquid is raked by the impeller blades 8 into the cavity of the foam collector 7, from where, through the annular collector 6 and through the pipe 12, it is removed through the nozzle 13. When the liquid level in the housing 1 changes, the movable floats 10, respectively, either rise or fall together with fluid level. Together with the movement of the floats 10, the vertical position of the foam collector 7 and the impeller 8 changes and automatic adjustment of the system for removing the foam layer of the product when the liquid level changes is ensured.

If necessary, as sludge accumulates in the bottom of the housing 1, the sludge is periodically removed and the housing is flushed through the pipe 16.

Thus, the proposed utility model provides regulation of the removal of foam from the surface of the water when the liquid level changes, which helps to improve the quality of wastewater treatment from pollutants.

Claims (3)

1. A device for flotation wastewater treatment, containing a cylindrical body with a nozzle for supplying a liquid to be cleaned, a central outlet pipe, an impeller, a foam collector, characterized in that in the lower part of the hull is a flotation agent supply switchgear above which on the Central outlet pipe, made with the possibility of rotation around a vertical axis, the blades are fixed, at the same time, a holder with an annular collector equipped with a pipe for foam removal is fixed to the housing, and a foam collector installed on it with floats having the possibility of reciprocating motion relative to the central outlet pipe and rotating with it, and on the foam collector at its upper level an impeller is fixed, in addition, in the central outlet pipe above the level of the annular collector, windows for the removal of purified liquid are made, and the nozzle for supplying the liquid being cleaned is located tangentially to the diametrical section of the body in the plane of the blades. 2. The device according to claim 1, characterized in that a reflector is mounted on the central outlet pipe located below the level of the annular collector. 3. The device according to claim 1, characterized in that the bottom of the housing has a flushing nozzle.

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