SU977400A1 - Apparatus for flotation purification of effluents - Google Patents

Description

(54) DEVICE FOR FLOTATION CLEANING

soybean waters

The invention relates to flotation devices and can be used in agriculture for: wastewater treatment of livestock farms.

 A known device for flotation treatment in an ode comprising a rectangular case divided into communicating chambers by paired parallel partitions between which pipelines for supplying an air / water mixture, a device for recirculating purified water and saturating it are placed.

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In this device, a horizontal flotation cell determines the horizontal current to be cleaned: my liquid. In combination with the vertical movement of the bubbles of their bubbles, this installation is characterized by low specific productivity.

A known installation for flotation treatment of wastewater, including the site preparation of the water-air mixture and free-flow floater open type C2J.

For free-flow flotation installations, the formation of air bubbles of large diameter, whose size is an order of magnitude higher than that of the pressure structures, is characteristic, which determines the disadvantage of this installation, which consists in the low efficiency of the cleaning process.

The closest technical solution to the present invention is a flotation device.

10 wastewater, containing a housing or flotation cell, nozzles for supplying the source fluid, axially installed in the housing water intake pipe, scraper mechanism for removal of foam

15 to adjust the level of the liquid in the GZ flotation cell.

However, the mechanism for adjusting the level of liquid in the flotation cell does not allow its permissible

20 changes in level, due to the fact that an increase in the diameter of the intake device leads to a decrease in the flow rate of the fluid being cleaned, as a result of which siltation occurs

25 of the inner surface of the pipe, reducing its flow area. The fluctuation of the level of the liquid being cleaned with a fixed mechanism of foam removal leads to the fact that when

Claims (3)

The 30 level part of the foam is not removed by the mechanism, and as the level increases, the moisture of the removed sludge increases and, consequently, the quality of cleaning deteriorates. In addition, during operation of the rotary scraper mechanism for foam removal, the foam product is unwound, which results in partial mixing. This results in a return (Parts of the suspensions to the purified liquid, resulting in deterioration of the quality of purification. The invention is an improvement in the quality of purification. The goal is achieved by providing a device for flotation purification of sewage containing a housing supplying the fluid to be cleaned, an axially installed pipe in the housing for draining the cleaned liquid and foam removal means, made in the form of scrapers, are provided with cups with floats installed on the outside of the housing the volume in the lower part of the housing has connections to connect the cups to the housing and the scrapers are mounted on the floats.In addition, the device is equipped with a soothing grate located under the scrapers.Fig.1 shows a device for flotational wastewater treatment, seen from the side; Fig. 3 is a section A-A in Fig. 2. A device for flotation treatment of wastewater includes a flotation cell 1, in the lower part of which a pressure chamber 2 is located with the formers 3, the distribution pipe 4 and the intake device consisting of dozabornoy tube 5, nozzle 6 and the pocket 7 clarified liquid. In the upper part of the flotation cell 1, the grill 9 and the foam removal mechanism consisting of the actuator 10 and the two-armed foam removal scraper 11 are fixed on the floats 8. Vertical cups 13 are connected to the flotation chamber 1 through the holes 12, into which the floats 8 are placed. For collecting foam the flotation chamber 1 in the upper part is equipped with a chute 14, which connects with the defoaming tract 15, 1FLENING of the foam removal mechanism with floats 8 is equipped with adjusting devices 16. The device works as follows. A working fluid is supplied to the pressure chamber 2 under pressure, which is .cq, which is a preparatively prepared over-sprayed air solution in the fluid. Through the throttling orifices of the nozzles 3, the working fluid enters the hydraulic chamber 1, and the air is released from it in the form of microbubbles. Through the distribution pipe 4 into the flotation cell 1, the source effluent is fed. In the volume of the flotation cell 1, microblocks are fixed on the suspended particles and carried them to the surface, forming a foam. By the scraper 11 of the foam removal mechanism, the foam is transported from the center. to the periphery of the flotation chamber 1 and, is dumped into the chute 14, from where it flows by gravity into the foam discharge path 15 and is removed from the device. Since the foaming mechanism is installed on the floats 8 immersed in the liquid to be cleaned, which are located in the vertical cups 13 connected to the flotation chamber 1, fluctuations in the level of the liquid in the flotation chamber 1 do not affect that. 1 The foam layer to be removed. The grill 9, immersed in the surface layer of the fluid being cleaned, prevents circular movement under the action of the rotating scraper 11. The position of the scraper 11 relative to the surface of the fluid being cleaned is established by means of adjusting devices 16. Thus. The device allows you to maintain the desired humidity regardless of fluctuations in the level of the fluid being cleaned, in addition, prevents the foam layer from spinning up, preventing its mixing and returning a part of the suspensions to the purified liquid. The use of a device for the flotation treatment of wastewater allows, by reducing the volume of the compacted product obtained and reducing its moisture content and, consequently, the cost of its further processing, to obtain an annual economic effect per device in the amount of 900 rubles. Claim 1. Device for flotation sewage treatment, comprising a housing, installed in the lower part of the nozzle for supplying the cleaned fluid, axially installed in the housing a pipe for draining the cleaned fluid and foam removal means, made in the form of in order to improve the quality of cleaning, it is equipped with cups with floats installed on the outer side of the body, while in the lower part the body has nozzles connecting the tubes to the body, and the scrapers are installed on the floats. 2. The device according to claim 1 from whether it is provided with a soothing grate located under the scrapers. . Sources of information taken into account in the examination 1. Author's certificate of the USSR 785205, cl. C 02 F 1/24, 1978. 2. USSR author's certificate 789403, class C 02 F 1/38, 1978, 3. Kopylov In, And. Wastewater treatment pressure flotation. M., 1978, p.60. sixteen