RU152810U1 - SEWAGE TREATMENT DEVICE - Google Patents

Abstract

1. A device for wastewater treatment, comprising a cylindrical housing with front and rear bottoms, with granular filling, inside of which a shaft rotatably mounted coaxially mounted, contaminated inlet and purified water outlet pipes, characterized in that the shaft is from the front of the bottom the impeller is fixed, placed in a casing equipped with a tangential pipe for supplying wastewater for treatment, there is a screw inside the casing, the bottoms are perforated, a filling hopper is fixed in the upper part of the casing, and a drainage chamber is attached to the rear bottom, which in the upper part contains a defoaming conveyor, a foam collector, a pipe for draining purified water, while the upper part of the bottom adjacent to the conveyor zone forms an open segment for free passage of foam. 2. The device according to claim 1, characterized in that a reflector is installed in front of the purified water outlet pipe. 3. The device according to claim 1, characterized in that the backfill reaches the level of an open segment. The device according to claim 1, characterized in that in the lower part of the housing there is a flushing nozzle. 5. The device according to p. 1, characterized in that between the spirals of the screw are carbon graphite rods in several rows in diameter.

Description

The proposed utility model relates to devices for wastewater treatment from organic and inorganic pollutants by electrocoagulation and can be used in chemical and petrochemical industries, mechanical engineering, production of building materials and other industries.

Known devices for treating wastewater from pollutants by electrocoagulation. In the device (patent No. 201517, bull. No. 17, 09/15/94), in a rectangular casing there is a graphite anode in the bottom part, above which there is a backfill of metal material and lattice cathode electrodes. Wastewater moves between labyrinth partitions. The disadvantages of this device are that the lack of mixing of the anode filling can lead to caking of the granules and a decrease in the intensity of the electrochemical process. In addition, the removal of flotation foam from the surface of the liquid is not organized, and the foam enters the outlet pipe.

The use of anodically soluble backfill is implemented in galvanic coagulators, which are a flowing rotary drum (see in the book “Analysis, design of technologies and equipment for wastewater treatment” V.A. Kolesnikov, N.V. Menuputina, M. Delhi print. 2005 , 226 p., Fig. 2.15, p. 64). A mixture is formed in the drums, forming a galvanic pair. The disadvantage of such devices is the lack of removal of flotation foam from the treated water, and this requires an additional tank with a flotation system.

Known electrocoagulator according to the patent for utility model No. 58115 ("Electrocoagulator for wastewater treatment", Bull. No. 31, 10.11.2006 g), which contains a cylindrical body and two bottoms of dielectric material, a ring electrode, which is an anode, filled with anodo-soluble shavings, perforated diaphragms, a cathode in the form of fixed plates, each of which is located in a perforated dielectric casing. Mixing of the anode filling is carried out by a central shaft with blades rotating from an external drive.

This device is taken by us as a prototype. The disadvantages of the prototype are as follows: for the implementation of electrochemical dissolution, an external drive is required to rotate the central shaft and there are difficulties with current supply and safety, complete filling of the body with anodically soluble material leads to insufficiently effective treatment of wastewater and to the joint removal of wastewater together with flotation foam, which makes it necessary additional equipment for their separation.

The technical result, the achievement of which is directed by the proposed device is to increase the cleaning efficiency and reduce energy consumption. This is achieved by the fact that in the cylindrical body there is a coaxially rotating shaft with a mixing device in the form of a screw, between the spirals, which are carbon-graphite rods, inside the body there is an anodically soluble backfill, forming a galvanic pair with carbon-graphite rods, the front and rear bottoms are perforated, front front bottom the shaft contains an impeller placed in a casing equipped with a tangential nozzle, and a diverting chamber with a foam removal conveyor and foam collector is attached to the rear bottom th.

The essence of the claimed utility model is illustrated in FIG. 1 and FIG. 2.

FIG. 1. A device for wastewater treatment (cross section).

FIG. 2. View A.

Here:

1. Case

2. Casing

3. Impeller

4. Front rotation unit

5. Bunker (funnel)

6. Front perforated bottom

7. Filling from anodic soluble substance

8. Val

9. Auger

10. Rear perforated bottom

11. Conveyor

12. Foam container

13. Branch pipe of the cleared water

14. Reflector

15. By-pass chamber

16. Rear rotation unit

17. Flushing nozzle

18. Carbon graphite rods

19. Pipe for supplying contaminated water

The device is a cylindrical body 1, equipped on both sides with perforated bottoms 6 (front) and 10 (rear). Inside the housing 1, a shaft 8 is mounted with the possibility of rotation in nodes 4 (front) and 16 (rear). A casing 2 is fastened to the housing 1, in front of the front bottom 6, inside of which there is an impeller 3 mounted on the shaft 8. The casing 2 has a dirty water supply pipe 19 mounted tangentially to the casing 2. Inside the housing 1, on the shaft 8 there is a screw 9 between the front 6 and the back 10 bottoms, and on the body, in the area of the front bottom there is a funnel 5 for filling the granules 7. Between the spirals of the screw 9 are carbon graphite rods 18 in several rows in diameter, which are the cathode. An outlet chamber 15 is attached to the rear bottom 10, which in the upper part contains a conveyor 11, a foam collector 12, a purified water outlet pipe 13, in front of which there is a reflector 14. The housing 1 in front of the rear bottom 10 has a washing nozzle 17. The rear bottom 10 has perforation only up to heights of 0.6-0.75 D - the diameter of the housing, and the upper part of the rear bottom adjacent to the zone of the conveyor 11 forms an open segment for free passage of foam.

The device operates as follows: through a funnel 5, iron or aluminum shavings or granules are poured into the body cavity, forming galvanic couple with carbon graphite rods, to the level of perforation of the back plate 10 (0.6-0.75 D) and the source waste water begins to be supplied through the pipe 19 . The tangential fluid supply drives the impeller 3, which ensures rotation of the shaft 8 with the screw 9. The waste water enters through the perforated bottom 6 and passes through the backfill layer 7, in which the iron or aluminum fraction is the anode and dissolves with the formation of coagulant oxides in the form of flakes. . The rotation of the screw 9 contributes to the mixing of the galvanic components, the intensive release of oxygen at the anode and the hydrogen at the cathode, which ensures the flotation of pollutants and coagulant to the upper part of the space of the housing 1. The rotation of the screw 9 ensures the movement of the foam layer to the rear bottom 10 and it enters the blades the conveyor 11, which is driven from an external source (not shown) and enters the foam collector 12. The purified liquid through the perforation of the bottom 10 enters the outlet chamber 15 and drains through the pipe 13. The purified water outlet deflector 14 to the vent pipe 13 prevents the ingress into the discharge nozzle portion of a foam, has got into the discharge chamber and it rises up into the zone of action of the conveyor 11.

Thus, several factors act simultaneously in the proposed device — electrochemical dissolution of the anode material and the formation of a coagulant, sorption of pollutants on the flakes of the coagulant, which increases the cleaning efficiency and reduces energy consumption.

Claims (5)

1. A device for wastewater treatment, comprising a cylindrical housing with front and rear bottoms, with granular filling, inside of which a shaft rotatably mounted coaxially mounted, contaminated inlet and purified water outlet pipes, characterized in that the shaft is from the front of the bottom the impeller is fixed, placed in a casing equipped with a tangential pipe for supplying wastewater for treatment, there is a screw inside the casing, the bottoms are perforated, a filling hopper is fixed in the upper part of the casing, and a drainage chamber is attached to the rear bottom, which in the upper part contains a defoaming conveyor, a foam collector, a pipe for removing purified water, while the upper part of the bottom adjacent to the conveyor zone forms an open segment for free passage of foam. 2. The device according to p. 1, characterized in that a reflector is installed in front of the outlet for purified water. 3. The device according to claim 1, characterized in that the backfill reaches the level of an open segment. 4. The device according to claim 1, characterized in that in the lower part of the housing there is a flushing nozzle. 5. The device according to p. 1, characterized in that between the spirals of the screw are carbon graphite rods in several rows in diameter.

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