SU426967A1 - METHOD OF REGULATING ELECTROLYSERATOR VOLTAGE WITH MERCURY CATHODE - Google Patents

Description

one

The invention relates to the production of chlorine and alkali by the method of electrolysis from a mercury cathode, in particular, to methods of controlling the voltage of the electrolysers.

There is a known method for adjusting the electrolyzer cell with a mercury cathode and hardened, and a-years by changing the interelectrode distance, according to which the voltage is controlled by the load current of the anodes, lowering each anode to a short circuit with a mercury cathode and then rising by the value of the minimum operating voltage. electrode distance.

The disadvantages of this method are in the duration of the regulation process and its Cv safety, due to the fact that during regulation, the value of the current in each anode depends on the position of the remaining anodes and changes in the regulation process, therefore the minimum voltage on the electrolyzer is established only after several successive approximations of the anode to the cathode. In addition, by lowering each anode to a short circuit with a mercury cathode, part of the mercury is lost due to sputtering in an electric arc and anodic dissolution.

The purpose of the invention is to reduce the duration of regulation and simplify the method.

This goal is achieved by the fact that

.Oz. Immediately as a control, set it at the minimum working electrode distance corresponding to a certain value of the current, after which the remaining anodes are alternately lowered until the value of the current is equal to the current in the test anode.

The reference anode, at this m, can be selected) ia for each cell lid or from a group of adjacent anodes. The position of the control anode, which corresponds to the minimum working interelectrode distance HOMv, can be determined by any known method. The magnitude of the current in the control anode is determined using a current-measuring device, and the second current device is used to measure the current values when the remaining anodes are lowered. In this case, the magnitude of the current, to which the descending of each anode proceeds 1T, is different for the current in the control anode and the current moment.

The proposed method makes it possible to speed up the adjustment of the cell voltage, at least twice as compared with the known method.

An example. On the R-300 electrolyzer, with a load of 275 ka, the voltage before adjustment is 4.9 volts. Number of employees

equal to 142 and the average load per anode is 1940 a.

First, one anode is lowered to the closure with the cathode and raised by 4 mm. At the same time, the current value in it, measured by DC current clamp V. V. Serkov, is equal to 275 a.

According to the current in this anode, selected as a control one, the remaining anodes are exposed using a second instance.

In the process of lowering the anodes, the current in the test anode increases to 1950 a.

Each enshd is lowered to a current value in it equal to the current value in the control

anode The voltage on the electrolyzer after adjustment was reduced to 4.6 volts.

Subject invention

5 The method of controlling the voltage of an electrolytic cell with a mercury cathode and solid anodes by changing the interelectrode distance, characterized in that, in order to reduce the duration of the adjustments to simplify the method, one of the anodes is chosen as the control, set it at the minimum working electrode distance corresponding to a certain value of the current, and then the remaining azodes are alternately lowered until the value of the current is equal to the current in the control anode at the moment.