SU392972A1 - BIPOLAR ELECTROLISER OF FILTRESS TYPE - Google Patents

Description

one

The invention relates to electrolytic cells used to carry out electrochemical redox processes in the production of acid or fraction from salt solutions and in the removal of excess acidity and alkalinity.

Limes are a bipolar filterpress-type electrolyzer containing frames with bipolar and external perforations electrodes, ion exchange membranes separating the electrolyzer into electrode chambers, anode and cathode, and collectors for feeding and withdrawing electrolyte.

The disadvantages of the design are the impossibility of ensuring the optimal hydrodynamic regime in the electrode chambers and the impossibility of controlling the level of electrolyte in them.

In order to create an optimal hydrodynamic mode in the electrode chambers when carrying out redox processes and removing excess acidity or alkalinity from solutions in the proposed electrolyzer, the electrode chambers are made with flow cells for electrolyte formed by flattened baffles with holes in the upper and lower parts and fixed on both sides of the bipolar electrodes. On the vertical sections of the collectors, solution level regulators are installed for the withdrawal of electrolyte.

FIG. 1 shows the proposed electrolyzer, front view; in fig. 2 - the same, side view; in fig. 3 - electrolysis frame; pas figs. 4 shows a section along LL in FIG. 3; in fig. 5 is a section along BB in FIG. four.

The electrolyzer consists of electrode frames / and ionite membranes 2 mounted on a common frame 5 and clamped with a clamp clip 4. The tightness of the apparatus and the electrical insulation of the electrode frames / provided by 1 spacers 5 installed along the perimeter of the electrode frames 1.

The electrolyte is introduced into the electrolyzer through the collector 6, and output through the collector 7. In the vertical section of the collector 7, devices are installed to control the level of the solution in the cells of the electrolyzer, consisting of a hollow sleeve 8 with notches 9, which are installed without a gap inside the collector 7. the sleeve 8 is closed with a fixed plug 10 with a drain outlet I. Nola the sleeve and can be moved inside the fixed sleeve 10 by means of a nut / 2.

The electrode frame / is made of metal or metal with a flat metal bipolar electrode 13.

On the electrode 13 installed optic partitions 14, forming a flow canap

for the solution fed into the electrode chamber through the fittings 15 and discharged through the fitting 16. In the upper and lower parts of the baffles 14 there are openings 17 for the passage of the solution and gases. Partitions 14 are made of external perforated electrodes 18. Gas outflow from the electrode chambers is carried out through fittings 19 and 20. Fittings 15 are connected to solution inlet manifolds 6, and fittings 16 to outlet manifolds 7.

Works electrolyzer as follows.

The original solutions through the collectors 6 and the fittings 15 are supplied to the electrode spaces of the electrode frames /. The leakage through the flow channels formed by the barriers 14 is subjected to electrochemical treatment. At the same time, the number of partitions 14 and their location is chosen in such a way as to ensure the required optimum hydrodynamic mode of solution movement relative to the surfaces of the electrodes 13 towards the membranes 2.

The solution after electrochemical treatment through fittings 16 and collectors 7 is removed from the apparatus.

In the course of the operation of the electrolyzer, gases are released from the solutions, which are discharged through fittings 19 and 20. The gases emitted may cause undesirable changes in the level of the solution inside the electrode chambers.

To maintain the optimum level of the solution, the movable floor of the sleeve 5 is set ino to the height in the desired position.

Subject invention

1. Bipolar filterpress type electrolyzer containing bipolar frames

and REMOTE perforated electrodes, ion-exchange membranes separating the electrolyzer into electrode chambers, and collectors for electrolyte supply and discharge, which means that in order to create an optimal hydrodynamic mode in the electrode chambers when carrying out redox processes and removing excess acidity or alkalinity

From solutions, electrode chambers are made with electrolyte flow channels formed by solid partitions with openings in the upper and lower parts and fixed in frames on both sides of the bipolar electrodes.

2. An electrolyzer according to claim 1, characterized in that solution level regulators are installed on the vertical sections of the collectors for withdrawal of electrolyte.

St 0i / s 2.

77

74

75

FIG

/ V

5-5