SU430520A1 - DEVICE FOR HEATING CURRENT LIQUIDS - Google Patents

Description

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The invention relates to iK devices for direct heating of conductive liquids by passing an electric current through them.

Devices are known for electrically heating current-conducting liquids containing a metal electrode and a current lead used in electric steam boilers and boilers. The disadvantages of these devices are the Exposure to scale formation, on the surfaces of contact with liquid, corrosion of current-carrying parts, which leads to a reduction in the service life of the electric heating device and an increase in operating costs.

The aim of the invention is to eliminate the listed non-affluence.

For this purpose, in the proposed device, the electrode is covered with a layer of current-conducting non-metallic (Porous material, for example, a carbon-based compound with a cement bond.

This type of electrical heating device makes it possible to drastically slow down the process: to form, increase power, eliminate the metal parts of the heater, increase service life, and reliability of operation.

The proposed device is illustrated in a drawing.

The device consists of a metal electrode /, a current lead of 2 ways of connecting the electrode; to the power grid, a layer 3. Of a porous nonmetallic conductive material and a current lead 4.

During operation, the metal parts of the device are subjected to intense electrochemical corrosion and are coated with incrustation. In order to prevent scale formation: and corrosion on the trench of adhes, they are coated with an anti-corrosion compound, such as epoxy.

To evenly distribute the electric potential throughout the entire volume of the protective layer, the electrode is equipped with an additional current-diode 4, which is connected when working parallel to the main current lead 2. The electrode / layer 3 coating protects the electrode from corrosion and scale, since the convective sheath formed around the electrode 1 layer 3 of the liquid prevents the formation of scale growth points and its deposition on the electrode surface. The conductive conductive phase of the composition, distributed oo throughout its volume, forms multiple contact circuits ic with the heated medium, which increases the power of the electric heating device.

The manufacture of the device is carried out according to the technology mastered by the industry of building materials from widely available materials, which determines their low cost.

For the manufacture of a protective layer. Can be applied, on a gauge, ground coke from Portland cement with the addition of a pore-forming reagent, for example, alumina powder In a mixture with caustic sodium. The mixture is sealed in water, poured into molds and processed in a steam air bath.

Subject N obremen

A device for heating current conducting capacitances containing a metal electrode and a current under water, characterized in that, in order to increase reliability in operation, a (conductive, non-metallic layer (Porous material, carbon-based, with a cement bond) is applied to the electrode.

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