SU981241A1 - Electrical coagulation apparatus - Google Patents

Description

The invention relates to the purification of (waste water in electrocoagulators and can be used in devices for the purification of natural and waste waters, as well as in devices for the electrochemical processing of various substances ..

Electrocoagulant electrodes are known that are formed as a charge and include a framework made of steel or aluminum, and a soluble ground electrode material, chips. These charging electrodes make it possible to produce bivalent iron and aluminum (III) as coagulant.

However, a highly effective coagulant based on iron (III), which cannot be obtained on a known electrode, is effective. The closest to the proposed technical essence and the achieved result is an electr. Coagulant containing plate-like soluble and insoluble anodes.

() ELECTRIC COAGULATOR

The electrocoagulator contains a housing with soluble and insoluble anodes placed in it, inlet and outlet connections of the water to be purified. The anodes are made of plates, are not mechanically joined together, and the water being cleaned washes the outer surface of the 2J anodes.

The disadvantages of this electrocoagulant are low productivity, low coagulum output in the form of ferric salt.

The aim of the invention is to increase the productivity of the apparatus by increasing the yield of coagulant in

15 as ferric salt.

Claims (2)

The goal is achieved by c. an electro-coagulator containing a case with soluble and insoluble anodes placed in it, nozzles of inlet and outlet of purified water, the anodes are mechanically connected into one electrode made of layers of insoluble particles and soluble in soluble materials, and the ratio of layers across the thickness is 1: (C5-5), and installed so that the inlet pipe of the treated water is on the side of the insoluble electrode layer. A part (by volume) of the charged porous electrode is made of insoluble material, for example, crushed graphite, and the other part of the same electrode is made of soluble material, such as steel shavings. The insoluble and soluble suits of the electrode are interconnected mechanically and electrically, i.e. are integral, the electrode is made porous and the solution (purified water) passes through the electrode from the side of insoluble material. Such a technical solution makes it possible to obtain in the water purification process a coagulant in the form of a ferric salt, which is more effective coagulant than a ferrous salt. The ratio of the thicknesses of the soluble and insoluble parts of the electrode is determined by e / s with the yield of the desired product, i.e. parts (in%) of iron ions in the three valent state to all dissolved iron. The ratio of the soluble and insoluble parts of the electron in thickness is advisable to vary from 1: 1.5 to 1 :. The effect of the ratio of the soluble and insoluble parts of the electrode in thickness on the yield of trivalent gels, is as follows: Thickness ratio The yield of the three soluble and non-sticky soluble parts of the electrode blade From the data it follows that practically acceptable output of ferric iron (above -70%) mo “It can be obtained under the condition that the soluble part of the electrode is 1.5 times thicker than the soluble one. The drawing shows electrocoagulant, General view. 1 The electrocoagulant has a housing 1, nozzles of the inlet 2 and outlet 3 of the treated water and an electrode of insoluble and soluble 5 materials. For wastewater treatment (or natural), the electrode is connected to the positive pole of the current source, and to the negative pole is another electrons, a type (cathode made of a porous or compact metal). Then the electrodes are placed in the treated water and turn on the current. Sewage (or natural) water is passed through the electrode from the side of insoluble material. Comparative data were obtained using an electrocoagulant with an electrode when comparing the thicknesses of the soluble and insoluble parts 1: 3 and the prototype device with the anodes of steel and graphite. The experiments were carried out under the same conditions: temperature, pH 2.6, electrolyte -0.5 n. sodium chloride solution, size: At a current density of 500 A / m at an electrolyte consumption of 12. The overall dimensions of the soluble parts are the same. When using electrocoagulant, the output of ferric iron 76 ,, power consumption 2, C kWh / m. When using a prototype device, the output of ferric iron is 6.3, the power consumption is 10.7 kWW / m. The application of the invention makes it possible to obtain α-coagulant in the form of ferric iron, the fraction of dissolved iron in the form of trivalent increases from 6.3 to 65-92 , to stop the consumption of deficient rolled products for the manufacture of sheet electrodes, to dispose of production wastes, to increase the cleaning effect, to increase the productivity of treatment facilities. In addition, the use of porous electrodes reduces power consumption compared to the prototype by 3-6 times. Claim 1. An electro-coagulant for wastewater treatment, comprising a housing with soluble and insoluble 1m. Placed in it, nozzles of input and output of the water being purified, so that, in order to increase the productivity of the apparatus. The anodes are mechanically connected in one electrode, made of layers of particles of soluble and insoluble materials, the thickness ratio of the layers being 1: (1.5-5) and installed so that the inlet of the input water to be purified is from the insoluble electrode layer. 2. The electrocoagulator of claim 1, which is characterized by the fact that electrosine, 6th genus is made of layers of particles of iron and) ita. Sources of information taken into account in the examination 1. Granovsky M.N. and others. Electrical liquid. L., 1976, p. 36-37. 2. USSR author's certificate No. 565889, cl. C 02 F l / fG, (prototype). J.