SU1006385A2 - Method of deferrization of water - Google Patents

Abstract

METHOD FOR DESIGNING WATER according to auth. N 709551. This is due to the fact that, for the purpose of increasing the degree of purification, an alternating current is imposed on the direct current. current at a density of 0.05-0.2.

Description

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about

The invention relates to a water treatment and purification technique for the removal of iron and copper from natural and waste waters. According to the main auth. No. 709551, a method for removing iron from water by electrolysis using insoluble electrodes at cathodic current density is known. 0.05-0 "3 A / d and anodic current density of 0.1-0, 2 A / d; in this case, graphite electrodes tl 3 are used as insoluble electrodes. However, electrolysis using direct current does not allow for a high degree of deironing , because even at low cathode current densities at the cathode, there is a side effect of the discharge of hydrogen ions, which reduces the current efficiency of the main reaction of the electrochemical reduction of iron. In addition, the possibility of using a number of metals as anodes, in particular titanium j, is limited instead of using graphite, which loses mechanical and electrical properties during electrolysis due to swelling and detachment of particles of a substance. The aim of the invention is to increase the degree of purification. The goal is achieved by agreeing to the method of removing iron without electrolysis using insoluble electrodes at a cathode current density of 0, O5-0.3 A / d and anodic density of 0.1-0.2 A / dm, imposing an alternating current at an alternating current density of 0.05-0.2 A / dm. : An increase in the purity of the proposed method is illustrated by examples. Stainless steel was used as cathodes, graphite and titanium were used as anodes. The electrical treatment time in all cases was 30 minutes. Example. The choice of the optimal density range of the variable-current (frequency 50 Hz). Anode - robbing. A conventional circuit with a coupling capacitor and a choke was used to apply alternating current to a constant current. AC density is taken over the cathode. Plant capacity 5 l / h. Data on the deferrization of water are given in table.1. As can be seen from the data of Table 1, in the range of superimposed densities of the foam current of 0.05–0.2 A / dm, there is a significant increase in the effectiveness of iron removal. Data on the deferrization of water with increasing productivity, are presented in table 2. The processing conditions are the same as in the example. As can be seen from the results given in Table 2, an increase in the production of T | I and the installation of 2 or more times has a much less effect on the degree of purification when applying alternating current to a constant than using a single direct current. The application of the proposed method of deferrization under the conditions of industrial application in comparison with the known method allows to increase the degree of purification while reducing energy consumption, as well as the ability to use more technological electrodes, such as titanium. Table 1

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0.03 0.1 0.1

0.6

Continuation of ta6l.1

table 2

Continuation of table 2

Claims (1)

METHOD OF WATER DECONGELIZATION by ed. No. 709551. about t l and that, with the aim. increase the degree of purification, · on pos. thawed current impose alternating. current at a density of 0.05-0.2 A / d ^. 1 10063B5 2