RU2113412C1 - Galvanocoagulator for purification of industrial sewage - Google Patents

Abstract

FIELD: effluent purification facilities. SUBSTANCE: this relates to purification of industrial sewage from ions of heavy metals, arsenic, chromium, fluorine, organic floatation reagents, petroleum products. Galvanocoagulator for purification of industrial sewage has cylindrical shell installed for possible rotation around its longitudinal axis, funnel which is located at one of end faces of shell with clearance relative to shell. Positioned inside shell of galvanocoagulator is bubbler which is made in the form of two pipes which are crossing and connected to each other. Each of pipes has holes made according to spiral line. Pitch of spiral is equal to double-length of pipe. One of bubbler ends is rigidly secured in funnel, and other end is connected to compressed air delivery system. EFFECT: higher efficiency. 1 dwg

Description

 The invention relates to the field of industrial wastewater treatment, in particular, to the design of a galvanic coagulator for wastewater treatment from heavy ferrous and non-ferrous metal ions, including iron, zinc, copper, arsenic, chromium, fluorine, organic flotation reagents, oil products, etc. .

 It is known to use an electrolyzer for wastewater treatment, comprising a cylindrical housing connected to the negative pole of the current source, a cylindrical housing located in the housing and connected to the positive pole of the current source. On the surface of the casing is a diaphragm made of dielectric material, and inside the casing is filled with conductive material. The casing is freely located in the housing and rotates around its longitudinal axis of symmetry, which is parallel to the longitudinal axis of symmetry of the housing. Tubes for supplying and discharging water [1] are built into the casing.

 A disadvantage of the known device is the use of electricity for the implementation of physico-chemical processes for the extraction of heavy metal ions.

 It is known to use a galvanic coagulator for wastewater treatment in the galvanic couple mode without applying current from an external current source.

 The galvanic coagulator contains a cylindrical shell mounted rotatably around a longitudinal axis, a funnel located at one of the ends of the shell with a gap relative to it, and a compressed air supply system. Inside the shell is a galvanic graphite-iron pair [2].

 A disadvantage of the known device is that it works without supplying air to the purified water, which leads to a deterioration in the treatment of wastewater from ions.

 The purpose of the invention is to intensify the formation of coagulants and improve wastewater treatment from heavy metal ions, oil products.

 This goal is achieved in that the galvanic coagulator containing a cylindrical shell mounted for rotation around a longitudinal axis, a funnel located at one of the ends of the shell with a gap relative to it, and a compressed air supply system equipped with a barbator located inside the shell, made in the form of two intersecting and interconnected tubes, each of which has openings made along a helix, the pitch of which is equal to two lengths of the tube. One of the ends of the barbator is rigidly fixed to the funnel, and the other is connected to the compressed air supply system.

 The presence of a barbator in the galvanic coagulator and its execution in the form of two intersecting and interconnected tubes, in each of which holes are made, located along a helix having a step equal to two lengths of the tube, makes it possible to create an additional rotational movement of the liquid (purified water), which leads to an increase in the rate of formation of coagulants.

 The implementation of the bubbler in the form of crossed tubes makes it possible to create a helical supply of compressed air, under the influence of which the liquid (purified water) is given the same movement, which leads to an increase in the rate of contact of the liquid with microgalvanic vapors, and this, in turn, intensifies the formation of coagulants.

 The design of the galvanocoagulator is illustrated in the drawing.

 The galvanic coagulator for wastewater treatment contains a shell 1 mounted rotatably around a longitudinal axis, a funnel 2 located at one of the ends of the shell 1 with a gap relative to it. The funnel 2 is stationary during the rotation of the shell 1. Inside the shell 1 there is a bubbler 3, which is made in the form of two tubes 4 and 5. These tubes 4 and 5 intersect and are interconnected. The tubes 4 and 5 are connected to each other using tubes 6 and 7. The ends of the tubes 4 and 5 of the bubbler 3 are connected to the tube 7, which, in turn, is fixed in the funnel 2, the other ends of the tubes 4 and 5 are connected to the tube 6, which, in turn, it is connected to the compressed air supply system through the nozzle 8. A nozzle 9 is mounted in the casing 1 for supplying purified water.

 Galvanocoagulator for wastewater treatment works as follows.

 Through the funnel 2, 4: 1 iron shavings and coke are loaded into the casing 1, the barbator 3 is connected through the pipe 8 to the compressed air supply system, and the purified water is supplied through the pipe 9 to the casing. Then, with the help of an electric drive, the shell 1 is brought into rotation and at the same time compressed air is passed into the barbator 3. The iron shavings and coke located in the shell 1 form many microvoltaic pairs, where the cathode is coke particles (carbon) and the anode is iron shavings. During the operation of the galvanocoagulator, iron is oxidized, forming iron hydroxides, which become coagulants and capture metal and non-metal ions. The result is precipitation in the form of ferromagnetic compounds.

 When compressed air is supplied to the barbator 3, it exits from the openings of the crossed tubes 4, 5 and creates a helical motion of the purified water. The air passing through the tubes 4 and 5 of the bubbler 3 is a kind of catalyst that increases the rate of formation of coagulants, and thereby contributes to the intensification of the formation of ferromagnetic compounds during the interaction of coagulants with metal and non-metal ions. Thus, water purification from pollution is accelerated.

 The design of the galvanocoagulator according to the invention allows to intensify the process of formation of coagulants and receipt of precipitation in the form of ferromagnetic compounds and thereby improve the treatment of wastewater from ions of heavy ferrous and non-ferrous metals, as well as from petroleum products and fats.

 The proposed design of the galvanocoagulator provides high performance in the process of removing contaminants from industrial wastewater. Wastewater from ions of heavy ferrous and non-ferrous metals, arsenic, chromium, fluorine, organic flotation reagents, oil products and other impurities is purified in a galvanic coagulator according to the invention by microferritization using magnetite obtained directly in this device without limiting pH values and concentrations of removed ingredients, without the cost of electricity.

 The proposed galvanocoagulator provides high efficiency and a significant depth of industrial wastewater treatment from various impurities.

Claims (1)

 A galvanocoagulator for wastewater treatment, comprising a cylindrical shell mounted rotatably around a longitudinal axis, a funnel located at one of the ends of the shell with a gap relative to it, and a compressed air supply system, characterized in that it is provided with a barbator inside the shell, made in the form two intersecting and interconnected tubes, each of which has holes made along a helix, the step of which is equal to two lengths of the tube, one of the ends of the barbator is rigidly fixed to the raven e, and the other is connected to a compressed air supply system.