RU2236379C2 - Sewage water purification apparatus - Google Patents

Abstract

FIELD: equipment for purification of industrial sewage water, may be used in enterprises of mining, metallurgical, chemical and other branches of industry.

SUBSTANCE: apparatus has vessel containing electroplating pair and provided with branch pipes for supplying of sewage water and discharge of used water; branch pipes for feeding of electroplating pair and removal of sludge, vibration exciter, restricting collapsible grids, dispersed air supplying chamber and flexible vibration-isolating members made in the form of cylindrical coiled springs. Vessel is made in the form of cylindrical vertical column. Movable and vibrating bar with fixed perforated basket and brushes are placed inside column. Basket contains electroplating pair. Pins of rhombic section are inserted into basket to depth making 3/4 of thickness of electroplating pair and arranged in helical line at pitch equal to half the height of electroplating pair. Apparatus may be used for purification of chromium-containing sewage water in recycled water management, for purifying of rinse water of electroplating production from heavy metals and number of organic substances, purification of oil-scale containing sewage water, of arsenic-containing solutions, as well as of sewage water of mentioned branches of industry.

EFFECT: reduced operation costs and increased efficiency in purifying of sewage water from heavy metal cations and anions.

5 cl, 3 dwg

Description

The invention relates to the field of wastewater treatment and can be used for purification of chromium-containing wastewater in the organization of recycled water supply, for the treatment of washing water from galvanic plants from heavy metals and a number of organic substances, for the treatment of scale oil containing wastewater, arsenic-containing solutions, for the treatment of wastewater from mining enterprises , metallurgical, chemical and other industries [1].

A known apparatus for wastewater treatment, containing a cylindrical body with a bottom with electrode material placed therein, a chamber for collecting purified water, a device for mixing and nozzles for the input and output of water. The housing is made with the possibility of reciprocating and oscillatory movements, while its inner surface is equipped with a shelf placed along a helix, the mixing device is made in the form of an electromagnetic device mounted on the housing, and the electrode material is made in the form of metal chips and small coke [2 ]. The device has a complex structure, since the functioning of the vibratory tank or vibratory feeder is carried out.

Known galvanic coagulator, which contains a cylindrical shell mounted with the possibility of rotation around a longitudinal axis [3]. The galvanocoagulator contains a barbator located inside the shell, made along a helical line. The barbator creates a helical motion of the purified water.

A device for treating industrial wastewater is known, including a vertically arranged cylindrical body with a galvanic pair placed in it in the form of a mixture of crushed graphite or coke with iron chips, a support grid and nozzles for the input and output of the processed liquid and air [4]. The galvanocoagulator case is rigidly fixed to a platform mounted on supports with the possibility of oscillatory movements. The platform is equipped with an electric motor with the ability to move it relative to the galvanic coagulator body, a rod with a load placed on it is rigidly fixed to the shaft of the electric motor perpendicular to its axis. The disadvantages of the known device are the ability to perform oscillatory and vibrational movements of the entire housing of the galvanic coagulator, and not its galvanic couple, necessary directly for the wastewater treatment process, the presence of a support grill does not lead to sufficient dispersion of air (carbon dioxide) and, therefore, to unsatisfactory aeration conditions in the working area , galvanic pair removal is possible due to the absence of a restrictive lattice, insufficient opening of the galvanic couple at low frequencies e of the order of 22 Hz (1320 rpm) due to the difficulty of creating platform vibration with a large and adjustable amplitude.

The device [4] is the closest to the claimed in the aggregate of essential features and is adopted as a prototype of the claimed device. The technical result of the invention is to reduce costs and increase the efficiency of wastewater treatment from heavy metal cations and anions.

The invention is characterized by a device representing a container in the form of a cylindrical vertical column, a moving and vibrating rod with a fixed perforated basket with electroplating and brushes is placed inside the column, pins of a rhombic section to a depth of 3/4 of the thickness of the galvanic couple are placed in the basket with the galvanic couple and placed along a helical line with a step equal to half the height of the galvanic couple, with vibration exciter, limiting collapsible gratings, dispersed air supply chambers and elastically antivibration elements as cylindrical coil springs; To move and vibrate the perforated basket with the galvanic pair, an electric motor is used with a crankshaft fixed to it with an eccentrically fixed finger, the rod moving frequency is changed by the number of revolutions of the electric motor shaft, and the oscillation amplitude is changed by the eccentricity and finger weight, the water being cleaned is sent to the holes of the perforated tube, which can to be driven in a rotational motion or to be motionless, treated water is discharged through an airlift. The combination of these features provides a technical result in all cases to which the requested object of legal protection applies.

In the device in the form of a tank, a cylindrical vertical column (1 and 2) 1, nozzles for supplying wastewater 2 and outlet 3 for treated water, a nozzle for supplying air 4, galvanic couple 5 containing coke (graphite) and iron scrap bounding collapsible gratings 6 An electromechanical connecting rod-crank drive located above or below, based on a platform with springs 7, of elastic vibration-isolating elements 8, is used to move and oscillate the galvanic couple in a vertical column. The rod moving frequency is changed by the number of revolutions of the electric motor shaft, and the oscillation amplitude is changed by the eccentricity value and finger weight. The drive includes an engine 9, a gearbox 10, a crankshaft 11 with an eccentric pin (not shown), a forked tip of the rod 12 and the rod 13, on which a perforated basket 14 with an galvanic pair is fixed, and brushes 15 for manual cleaning of the grilles. The drive is mounted on a metal structure, which is rigidly fixed on the cover of a cylindrical vertical column of the device or on building structures with high performance of the device. For the convenience of unloading the galvanic couple, in the middle of the column there is a support 16 and a rod connector 17, which when turning is a hinge and a lever for rotating the brushes.

The flow of the liquid being cleaned through the holes in the perforated tubes 18 (FIGS. 2, 2a) is divided into many jets. The perforated tubes can be fixed, encircled the basket with the galvanic couple in several rows along the height of the basket (Fig. 2a) or can be rotationally driven from the motor 19 through the sleeve 20, which rests on the support 21 for alignment. The rhombic section pins 22 are placed in the basket with the galvanic couple to a depth of 3/4 of the thickness of the galvanic couple, which are placed along a helical line with a step equal to half the height of the galvanic couple. Brushes (not shown) are fixed to the perforated tubes. The breaking of a liquid saturated with air into separate jets helps to increase the surface of the liquid being treated, improve their contact with the galvanic couple, intensify the interaction of the stream of jets with the galvanic couple and increase the efficiency of wastewater treatment.

The inventive device (Fig.1, 2, 2a) works as follows. Waste water to be cleaned from a receiving tank by a water pump (not shown) through a pipe 2 or a perforated pipe 18 is fed into a cylindrical vertical column of the device, where it interacts with a galvanic couple 5. Through the pipe 4 of the dispersed air supply chamber or injector 4, air is supplied in an amount 0.03 l / l. When the shaft of the electric motor 9 is mounted with the crankshaft 11 fixed to it with an eccentrically fixed finger, a galvanic pair is given a reciprocating and oscillatory movement along the rod, capacity, cylindrical vertical column. Vibrations create active mixing in the vertical direction without the formation of a funnel on the surface of the liquid. The surface of the mixed liquid, even at large amplitudes of oscillations, remains calm and even. The jets of the liquid to be cleaned flow through the galvanic couple 5. As a result of the operation of the galvanic couple, the iron - coke iron is anodically polarized and passes into the solution in the form of ferric hydroxide in the presence of oxygen. The oscillations of the basket or cylindrical vertical columns are transmitted to the elements of the galvanic couple 5, due to which there is a continuous update of the diffusion boundary layer on the surface of the elements of the galvanic couple and the efficiency of mass transfer processes between solid and liquid phases increases, which leads to an increase in the overall efficiency of wastewater treatment. By changing the magnitude of the eccentricity and the weight of the finger (load), optimal parameters are selected for the formation of fluidization conditions for the galvanic couple. The liquid purified from contaminants is discharged from a cylindrical vertical column through a pipe, airlift 3. Ease of disposal of solid-phase waste generated is ensured.

The proposed solution meets the criteria of industrial applicability, novelty and inventive step.

Sources of information

1. O.P. Chernova, G.M. Kurdyumov. Galvanic wastewater treatment of metallurgical industries. MISiS Scientific School is 75 years old. Formation and development. - M .: MISS, 1997, p. 291-295.

2. RF patent 2002704 C1, 5 C 02 F 1/46, publ. 11/15/93, Bull. No. 41-43.

3. RF patent 2113412 C1, 6 C 02 F 1/463, publ. 06/20/98, Bull. Number 17.

4. RF patent 2130433 C1, 6 C 02 F 9/00, 1/46, publ. 05/20/99, Bull. No. 14 (prototype).

Claims (5)

1. A device for treating wastewater, including a container filled with a galvanic couple, with pipes for supplying wastewater and discharging treated water, supplying a galvanic couple and removing sludge, characterized in that the tank is presented in the form of a cylindrical vertical column, a moving and vibrating rod with fixed perforated basket with galvanic pair and brushes, in the basket with galvanic pair pins of rhombic section are placed to a depth of 3/4 of the thickness of the galvanic pair and placed along a helical line with a step equal to th galvanic half height, oscillation exciter limiting collapsible bars dispersed air supply chamber and antivibration elastic elements in the form of a cylindrical coil springs. 2. The device according to claim 1, characterized in that for the movement and vibration of the perforated basket with the galvanic couple, an electric motor is used, with a crankshaft mounted on it with an eccentrically fixed finger. 3. The device according to claim 1, characterized in that the frequency of movement of the rod varies by the number of revolutions of the shaft of the electric motor, and the amplitude of the oscillations - the magnitude of the eccentricity and weight of the finger. 4. The device according to claim 1, characterized in that the water to be purified is directed into the holes of the perforated tube, which can be rotationally motionless or stationary. 5. The device according to claim 1, characterized in that the purified water is unloaded through the airlift.

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