| 摘要 |
FIELD: chemical industry; methods and devices for purification of the galvanic production waste waters containing the heavy metals. ^ SUBSTANCE: the invention may be used for purification of the galvanic production waste waters containing the heavy metals. The method of purification of the waste waters containing the heavy metals consists in the combination of the electrocoagulation and the ultrasonic treatment of the waste waters with the subsequent filtration. At that the ultrasonic treatment of the waste waters conduct in the range of the frequencies from 19 up to 22 kHz with the amplitude of the oscillations from 5 up to 15 microns and the oscillation intensity from 2 up to 4 W/cm2, and the electrocoagulation treatment conduct at the constant current density being within the range from 0.5 up to 4 mA/cm2. The device for purification of the waste waters containing heavy metals includes the reaction chamber made with the geometrical dimensions calculated for the conditions of its acoustic resonance on operational frequency of the acoustic oscillations introduced into the being purified water. The internal surface of the wall of the reaction chamber is one of the cathodes, the other cathode of which is the tube mounted along the center of the reaction chamber, and coaxially between the cathodes there is the fixed on the reaction chamber anode made in the form of the set of the cylindrical tubes made out of the metal dissolving in the course of the electrocoagulation. At that the bottom of soaking drum is made conical. The technical result is the rise of efficiency of the waste waters purification from the heavy metals at the simultaneous reduction of the power inputs, the treatment duration, the reactants consumption and the labor input of the method, and also the production areas occupied by the purification systems. ^ EFFECT: the invention ensures the increased efficiency of the waste waters purification from the heavy metals, the reduced power inputs, the treatment duration, the reactants consumption, the labor input and the production areas occupied by the purification systems. ^ 4 cl, 3 dwg, 10 tbl, 10 ex |
