RU202424U1 - Galvanic coagulator for waste water treatment - Google Patents

Abstract

The utility model is intended for wastewater treatment. The technical result consists in increasing the efficiency of wastewater treatment and increasing the specific productivity of the apparatus. Due to the fact that the liquid rotates in a stationary apparatus, energy consumption is reduced when mixing the loading of a galvanic coagulator (copper and iron shavings). The device contains a galvanic coagulator body 1, a galvanic coagulator body cover 2, which includes a pipe for supplying treated water 3, as well as a pipe 4, intended for placing inside the galvanic coagulator loading (copper and iron shavings) and exhaust air removal. On the body of the galvanic coagulator at a distance of 1 / 3-1 / 2 from the height there is a branch pipe for draining the treated water 5. Inside the body there is a bubbler 6 made in the form of pipe combs. The pipe manifolds are connected to the compressed air supply system through the branch pipe 7. Along the axis of the galvanic coagulator housing there is a stirrer 8, which is driven by an electromechanical drive 9, and the stirrer is turned on only for the period of starting the galvanic coalescer, or at a high concentration of contaminants in the source water, or at a high particle size loading of galvanic couples.

Description

The utility model relates to the field of applied electrochemistry and can be used to clean surface, stratal and industrial waste water from ions of heavy metals, arsenic, chromium, fluorine, organic flotation reagents, and oil products.

Known "Galvanic coagulator for water purification" [RU No. 2006480 IPC C02F 1/46, publ. 01/30/94], containing a cylindrical body loaded with coke and iron or copper scrap, in which a shaft equipped with blades is installed along the body axis, and the blade height is 0.85-0.95 of the radius of the apparatus. The shaft with blades in this apparatus is used for mixing the processed aqueous solution and loading placed in the housing. The body is equipped with devices for water supply and drainage.

The disadvantage of this device is that mechanical stirring of the elements of the galvanic pair does not allow achieving a high rate and stable formation of insoluble compounds and, as a consequence, reduces the efficiency of purification of the treated aqueous solution. Also, when processing water with a high concentration of organic (pollutants) impurities, part of the shavings that are not affected by mechanical stirrers becomes overgrown with impurities, which leads to a deterioration in the cleaning efficiency of the treated aqueous solution, not providing intensive galvanocoagulation process and effective removal of impurities.

The closest is a galvanic coagulator for wastewater treatment, selected for the prototype [RU No. 2113412, IPC CO2R 1/463, publ. 20.06.1998] as the closest in the aggregate of essential features to the claimed utility model. The galvanic coagulator contains a cylindrical body mounted for rotation around a longitudinal axis, a funnel for loading particles of a galvanic pair, located at one of the ends of the body with a gap relative to it. The galvanic coagulator contains a bubbler located inside the cylindrical body, made in the form of two intersecting and interconnected tubes. Each of the tubes has holes made along a helical line, the pitch of which is equal to two tube lengths. One end of the bubbler is rigidly fixed in the funnel, and the other is connected to the compressed air supply system. A galvanic pair is located inside the housing.

The disadvantage of the prototype device is its high energy consumption due to the need to rotate the body of the galvanic coagulator, loading and purified water. The proposed design of the galvanic coagulator bubbler allows aeration only in the area of its location, without capturing the entire volume of the liquid to be purified.

The task of the utility model is to create an efficient and compact apparatus for purifying wastewater from ions of heavy metals, oil products and other impurities, including those of organic origin.

The technical result consists in increasing the efficiency of water purification from ions of heavy metals, impurities of organic origin by intensifying the formation of floccules of galvanic vapor-pollutant and in increasing the productivity of water purification by introducing a number of structural elements.

The specified technical result is achieved by the fact that the claimed utility model, like the prototype, contains a bubbler located inside a cylindrical body and connected to the compressed air supply system, a purified water supply and drain pipe.

In contrast to the prototype, the body of the galvanic coagulator is located vertically. The vertical position of the housing is a technological necessity to prevent the deposition of galvanic vapor particles and is most suitable for creating a vortex motion of a mixture of galvanic vapor particles using the air mixture flow.

The bubbler, made in the form of intersecting and interconnected pipe combs, allows compressed air to be supplied to the galvanic coagulator housing, thereby maintaining the galvanic loading in a suspended state, as well as oxidizing organic contaminants in the treated water.

A stirrer is installed along the axis of the galvanic coagulator housing.

The use of an agitator is necessary in the case of large particles of galvanic vapor (for example, copper and iron shavings) and the treatment of water with a high concentration of impurities. After starting and establishing stable mixing, the mixer is turned off, mixing is carried out exclusively by aeration.

The galvanic coagulator for wastewater treatment (Fig. 1) contains a housing 1, a cover of the housing of a galvanic coagulator 2, which includes a pipe for supplying treated water 3, as well as a pipe 4. Pipe 4 is intended, firstly, for galvanizing (a mixture of iron and copper shavings in a ratio of 1: 1), and, secondly, for the removal of exhaust air. On the body of the galvanic coagulator, at a distance of 1/3 - 1/2 from the top, there is a branch pipe for draining purified water 5. Inside the body there is a bubbler 6 made in the form of tubular combs. Tubular combs (Fig. 2) are connected to the compressed air supply system through a branch pipe 7. Along the axis of the galvanic coagulator housing there is a stirrer 8, which is driven by an electromechanical drive 9.

The galvanic load in the housing 1 in the form of iron and copper shavings forms a multitude of microgalvanic pairs, where copper particles are the cathode, and iron shavings are the anode. During the operation of the galvanic coagulator, iron is oxidized, forming iron hydroxides, which become coagulants and capture metal and non-metal ions. When compressed air is supplied to the bubbler 6, air comes out of the holes and creates a vortex movement of the water to be purified. When processing a highly contaminated aqueous solution or when using large particles of galvanic vapor, it is necessary to use a stirrer 8, which is driven by an electromechanical drive 9.

At the end of the cleaning, the aqueous solution is removed through the purified water outlet 5. The aqueous solution at the outlet should have a dark yellow tint (due to the presence of oxidized iron).

Thus, an increase in the efficiency of wastewater treatment and an increase in the specific productivity of the proposed device is achieved due to the fact that an air mixture is used for water purification and highly efficient mixing of the purified water and loading in a stationary apparatus (at high concentrations of contaminants in water or large particles of galvanic loading, an agitator is additionally switched on ).

Claims (1)

Galvanic coagulator for wastewater treatment, containing a housing, pipes for supplying and removing treated water, a bubbler made in the form of intersecting and interconnected pipe combs, connected to a compressed air supply system, characterized in that the bubbler is located in the lower part of the galvanic coagulator, on the body of the galvanic coagulator at a distance of 1 / 3-1 / 2 from the top there is a branch pipe for draining the purified water, the branch pipe for loading the galvanic coagulant and removing the exhaust air is located on the cover of the galvanic coagulator, along the axis in the housing there is a stirrer for the possibility of additional forced mixing of the processed aqueous solution.

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