RU58115U1 - ELECTROCOAGULATOR FOR SEWAGE TREATMENT - Google Patents

Abstract

The utility model relates to devices for electrochemical wastewater treatment using the electrocoagulation method for cleaning heavy metal ions, emulsions, oils, fats, oil products and can be used in the chemical, oil, food, pulp and paper industry. The electrocoagulator comprises a cylindrical body of insulating material 1, bounded on both sides by conical bottoms (front 4 and rear 5), in which there are nozzles for supplying and discharging liquid. Inside the housing 1, there is a cylindrical anode 2 and plate cathodes 3 placed in perforated dielectric housings 6 to prevent short circuits between the cathodes 3 and the anodically soluble bulk chips 15, which are inclined to the longitudinal axis of the housing at an angle (30-60) °. The space in the housing is filled with anodic soluble shavings 15, for filling which there is a hatch 9 with a cover 10, and to remove residual shavings and sludge particles there is another hatch 11 with a cover 12. The filling anodically soluble shavings 15 inside the housing 1 are limited by the front 13 and back 14 perforated partitions. Inside the housing passes a rotating shaft 7 through the nozzles for supplying and discharging water. On the shaft 7 there are blades 8 having an inclination to the axis of the shaft 7 in the same direction as the inclination of the plate cathodes 3, and made of dielectric material. During the operation of the electrocoagulator, the chips are mixed, which intensifies the mass transfer, promotes uniform distribution of the coagulant and eliminates the possibility of sludge pores of the perforated casings 6 and the formation of passive films in them, and the wastewater flowing through the electrocoagulator is intensively saturated with coagulants from the dissolving chips and sent for further cleaning cameras. Simultaneously with flowing water from the cavity of the coagulator

hydrogen released at the cathode is carried away and the possibility of accumulation of explosive mixtures inside the electrocoagulator is excluded.

1 n.p. and 3 z.p. f-ly, 3 ill.

Description

The utility model relates to devices for electrochemical wastewater treatment using the electrocoagulation method for cleaning heavy metal ions, emulsions, oils, fats, oil products and can be used in the chemical, oil, food, pulp and paper industry.

Electrocoagulation units are known in which electrodes made of aluminum or iron are used as the soluble anode (see the textbook “Engineering Ecology” edited by V.T. Medvedev and M. Gardariki’s textbook. 2002, pp. 619-620.)

The disadvantage of such devices is significant energy consumption and high consumption of anode metal (aluminum, iron).

Known electrocoagulator according to copyright certificate No. 1706967, C 02 F 1/46, Bull. No. 3 dated 01/23/92, adopted as a prototype, comprising a cylindrical housing mounted for rotation, connected to the positive pole of the current source and partially filled with anodically soluble shavings and a cathode separated from the charge by diaphragms and mounted at an angle of 25-90 ° to the axis of rotation of the housing , and a call pipe located above the surface of the chip.

The main disadvantage of this device is the rotation of the entire electrocoagulator, which causes the need for sliding current leads, causing sparking, which leads to increased explosion hazard.

The technical result to which the proposed utility model is aimed is to increase reliability and safety by eliminating sliding current leads and internal cavities that allow the accumulation of explosive hydrogen.

The technical result is achieved by the fact that in the electrocoagulator for wastewater treatment, containing a cylindrical body and two bottoms of

dielectric material, a ring electrode, which is an anode and filled with anodic soluble shavings, perforated diaphragms, a cathode, it is new that the cathode is made in the form of fixed plates, each of which is in a perforated dielectric casing. The cathodes are installed at an angle of (30-60) ° to the longitudinal axis of the housing. Inside the housing, a rotating shaft of dielectric material is coaxially located, on which blades are located, made also of dielectric material. The blades are mounted at an angle to the axis of the shaft in the direction of the angle of inclination of the cathodes.

The essence of the utility model is illustrated in figure 1 - figure 3, where:

Figure 1. - Electrocoagulator for wastewater treatment - The inventive utility model.

Figure 2. - Electrocoagulator for wastewater treatment - The inventive utility model - (section AA)

Figure 3 - Case with the location of the cathodes - scan

Here: 1 - a cylindrical body, 2 - a cylindrical anode, 3 - plate cathodes, 4 - a front conical bottom, 5 - a back conical bottom, 6 - a perforated dielectric casing, 7 - a shaft, 8 - blades, 9 - a hatch for backfilling anode-soluble chips with a lid 10, 11 - a hatch for removing residual shavings with a lid 12, 13 - a front perforated partition, 14 - a rear perforated partition, 15 - a charge anodo-soluble shavings.

The electrocoagulator comprises a cylindrical body of insulating material 1, bounded on both sides by conical bottoms (front 4 and rear 5), in which there are nozzles for supplying and discharging liquid. Inside the housing 1, there is a cylindrical anode 2 and plate cathodes 3 placed in perforated dielectric housings 6 to prevent short circuits between the cathodes 3 and the anodically soluble bulk chips 15, which are inclined to the longitudinal axis of the housing at an angle (30-60) °. Space in the building 1

filled with anodic soluble shavings 15, for filling which there is a hatch 9 with a cover 10, and to remove residual shavings and sludge particles there is another hatch 11 with a cover 12. The filling anodically soluble shavings 15 inside the housing 1 are limited by the front 13 and back 14 perforated partitions. Inside the housing passes a rotating shaft 7 through the nozzles for supplying and discharging water. On the shaft 7 are blades 8 having an inclination to the axis of the shaft 7 in the same direction as the inclination of the plate cathodes 3.

Electrocoagulator works as follows. Before starting the operation of the electrocoagulator, metal chips 15 are filled in through the open hatch 9, which, when the shaft 7 rotates with the blades 8, fills the entire cavity of the body 1 of the electrocoagulator. After that, the lid 10 closes, a working current is supplied to the electrodes (cathode 3 and anode 2), and wastewater is supplied to the electrocoagulator through the inlet of the front bottom 4. Under the influence of electric current, the anodopolarized chips dissolve with the formation of metal ions that form hydroxide compounds with water which are coagulants that are discharged through the outlet pipe of the rear bottom 5.

In the process of operation of the electrocoagulator from the external drive, the shaft 7 rotates and the blades 8 located on it mix the chips, which intensifies the mass transfer, promotes uniform distribution of the coagulant and eliminates the possibility of clogging the pores of the perforated casings 6 and the formation of passive films in them. Thus, the wastewater flowing through the electrocoagulator is intensively saturated with coagulants from the dissolving chips and is sent for further purification into the precipitation chambers. Simultaneously with the flowing water from the coagulator cavity, hydrogen released at the cathode is carried away and the possibility of accumulation of explosive mixtures inside the electrocoagulator is excluded.

Claims (4)

1. Electrocoagulator for wastewater treatment, containing a cylindrical body and two bottoms of dielectric material, a ring electrode, which is an anode, filled with anodically soluble shavings, perforated diaphragms, a cathode, characterized in that the cathode is made in the form of fixed plates, each of which is in a perforated dielectric casing. 2. The electrocoagulator according to claim 1, characterized in that the cathodes are installed at an angle of (30-60) ° to the longitudinal axis of the housing. 3. The electrocoagulator according to claim 1, characterized in that a rotating shaft with blades made of dielectric material is coaxially located inside the housing. 4. Electrocoagulator according to claim 3, characterized in that the blades are installed at an angle to the axis of the shaft in the direction of the angle of inclination of the cathodes.