SU883192A1 - Filter-press type monopolar electrolyzer - Google Patents

Description

one

The invention relates to devices used in electrochemical propriety, specifically to electrolyzers for producing chlorine and caustic soda by electrolysis of sodium chloride solution.

A monopolar electrolyzer is known, comprising a cover, a housing-cathode and anodes attached to the bottom of the electrolyzer flj.

The disadvantage of this electrolyzer is its low unit power and significant power consumption.

The closest to the proposed technical essence and the achieved result is a monopolar filterpress type electrolyzer, including anodic frames with a titanium frame, current leads connected to one side of the frame, anodic elements made of a titanium mesh or perforated sheet with an active coating, welded in frames f2j.

The disadvantage of the known electrolyzer is a considerable power consumption.

The purpose of the invention is to reduce power consumption.

This goal is achieved by the fact that in a monopolar electrolyzer of filter press type, including anode frames with a titanium skeleton, anode elements made of titanium mesh or perforated sheet with an active coating fixed to the ramgos, and current leads connected respectively to

To one of the sides of the frame, at least two opposite sides of the frame, to one of which the current lead is attached, are provided with plates from metals selected from the row:

15 copper, aluminum, steel, located outside the frame and connected to it, and these sides of the frame are interconnected by copper rods with titanium shells, the copper rod being passed through the titanium frame and welded to the plates, and the titanium case of the rod is welded to the titanium frame.

Claims (2)

25 In FIG. 1 schematically shows an electrolytic cell / in FIG. 2 - anodna cell, side view; in fig. 3 is a section A-A in FIG. 2; in fig. 4a section bb in fig. 2, fig. 5 30 node T in FIG. 2. The electrolyzer consists of anode cells 1, cathode cells 2 and two end clamping plates 3. The anodic cell includes frame 4 with a frame 5 made of titanium, and electrode elements 6, which are perforated titanium sheet or mesh, on the surface of which is applied to the active coating. Two opposite sides of the frame 5 are provided with plates 7 of steel, located on the outer side of the frame and mechanically and electrically connected to the frame. The connection of steel with titanium can be carried out in various ways. In particular, ready-made bimetal billets - steel-titanium can be used. It is also possible to use the known steel compound with titanium through bimetallic lugs and other known compounds. The copper rods 8 go about the bottom side of the frame to the top, are passed through the titanium frame 5 and are attached to the steel plates 7. The copper rods 8 are equipped with a titanium housing 9 welded to the titanium frame 5. The electrode elements 6 are made of separate sections (p individual sheets) are provided with trough profiles 10, bolted 11 to protrusions 12, fastened to the lower and upper sides of the tan framework of the frame. Tokopodvod pr boiled to the steel plate 7 of the lower side of the frame. In another embodiment, the steel plates 7 may be located on all four sides of the ram, the protrusions 12 are welded to the sides of the frame. In another embodiment, the copper rods 8 with the casing 9 are rectangular in shape and the electrode elements 6 are attached to the frame 5 and the casing 9. When the anode cell is made in accordance with the invention, the current is evenly distributed over the surface of the electrode plates is minimal. At a current density of 5000 A / m and a height of 1200 mm of electrode elements, the voltage drop on titanic electrodes is 0.4–0.6 V less than the voltage drop in a known design. In addition, it is possible to reuse the electrode elements for applying an active coating, since the electrode elements can be easily detached from the frame. DETAILED DESCRIPTION OF THE INVENTION A monopolar filter-press type electrolyzer comprising anodic frames with a titanium skeleton, anodic elements made of a titanium mesh or perforated sheet with an active coating, mounted on the frames, and current leads attached respectively to one of the sides of the skeleton, characterized in that In order to reduce energy consumption, at least two opposite sides of the frame, to one of which a current lead is attached, are equipped with plates from metal parts selected from the series: copper, aluminum , steel, located outside the frame and mechanically and electrically connected to the frame, and these sides of the frame are connected by copper rods fitted with titanium housings, the copper rod being passed through the titanium frame and welded to the plates, and so on. The rod casing is welded to the titanium frame. Sources of information taken into account in the examination 1. Yakymenko LM Production of chlorine, caustic soda and inorganic bread products. M., Himi, 1974, p. 125-148. 2. Forward Germany No. 2059868, cl. 12 h 2, published on 24.06.71 (prototype). + PT h -f (+) Fig 1 I / l | .four. -f + 4 / Fig.b bb