RU2814658C1 - Device for electrochemical water treatment - Google Patents

Abstract

FIELD: chemical industry.

SUBSTANCE: devices for electrochemical treatment of water used to obtain washing, disinfecting, sterilizing and medicinal solutions. The device contains an electrochemical reactor made in the form of one diaphragm flow-through electrochemical modular element with anode and cathode chambers having inputs in the lower and outputs in the upper parts, a current source connected to the corresponding electrodes of the reactor chambers, a jet, a two-position liquid flow switch, synchronously operating three-position liquid flow switches installed at the inlet and outlet of the reactor. A two-position fluid flow switch is installed on the input line. The first input of the switch is connected to the brine supply line. The second input of the two-position switch is connected to the output of the pump. The pump inlet is connected to a container for the washing solution. The first output of the two-position switch is connected to the first input of the first three-position switch and the jet.

EFFECT: eliminating the growth of cathode deposits on the cathode and diaphragm, increasing the reliability of the device.

1 cl, 1 dwg

Description

The invention relates to chemical technology, namely to devices for electrochemical treatment of water, in order to regulate its acid-base properties and catalytic activity, and can be used to obtain washing, disinfecting, sterilizing and medicinal solutions.

A device is known for producing washing and disinfecting solutions, containing at least one electrochemical cell made of vertical coaxial rod electrodes installed in dielectric bushings, and an ultrafiltration diaphragm coaxially installed in the bushings between the electrodes. The solution being processed is supplied to the chamber of the negative electrode, and from the chamber of the negative electrode the solution is supplied to the chamber of the positive electrode. The resulting anolyte solution has a pH = 8.0 - 8.5 (RU 2088539 C1, C02F 1/46, 05/31/95). The disadvantage of this device is the impossibility of obtaining anolyte with pH≤5.0 and the formation of cathode deposits on the cathode and diaphragm, which over time deteriorate the operation of the device and can lead to its failure.

A known device for electrochemical water treatment contains an electrochemical reactor with anode and cathode chambers having inlets in the lower and outlets in the upper parts, a source water supply line and the first and second water outlet lines, synchronously operating reactor water flow switches installed respectively at its inlet and output, the first and second synchronously operating water flow switches, the first and second purified water supply lines, connected respectively to the switch inputs (RU 2211806 C2, C02F 1/461, 07/02/2001). The disadvantage of this device is the impossibility of obtaining the anolyte “AN - neutral anolyte” and the formation of cathode deposits on the cathode and diaphragm, which over time deteriorate the operation of the device and can lead to its failure.

The closest in technical essence and achieved result, adopted as a prototype, is a device for electrochemical water treatment containing an electrochemical reactor with anode and cathode chambers, a current source, synchronously operating three-position switches installed at the input and output of the reactor, a jet and a two-position switch installed at the output reactor cathode chamber (RU 198096 U1, C02F 1/46, 06/19/2019). The disadvantage of this device is the formation of cathode deposits on the cathode and diaphragm, which over time deteriorate the operation of the device and can lead to its failure.

The objective of the invention is to extend the service life of an electrochemical reactor by eliminating the growth of cathode deposits on the cathode and diaphragm and increasing the reliability of the device.

The task is achieved by the fact that the device for producing washing and disinfecting solutions contains an electrochemical reactor made in the form of one diaphragm flow-through electrochemical modular element with anode and cathode chambers having inputs in the lower and outputs in the upper parts, a current source connected to the corresponding electrodes reactor chambers, according to the invention, a two-position switch is installed on the input water supply line to which a pump and a container for washing solution are connected; the washing solution passing through the reactor chambers prevents the growth of cathode deposits, which, in turn, extends the service life and increases the reliability of the device.

The device works as follows. Synchronously operating switches 12 and 15 are installed at the inlet and outlet of the reactor. In position I, nozzle 11 is connected to the cathode chamber 3 and neutral anolyte (AN) is supplied through line 16, and catholyte (K) is supplied through line 14. In position II, acidic anolyte (A) flows through line 16, and catholyte (K) through line 14. In position III, neutral cathode-activated anolyte (ANC) enters through line 16.

To prevent the build-up of cathode deposits in the chambers of the electrochemical reactor 1, a two-position liquid flow switch 10 is installed on the input line 5. The circuit operates as follows. The brine supply pump 6 from tank 7 is turned off. Synchronously operating three-position liquid flow switches 12 and 15 are moved to position III. The two-position fluid flow switch 13 is moved to position I. The two-position liquid flow switch 10 is moved to position II. Pump 8 from the container with the washing solution 9 supplies the washing solution through a two-position liquid flow switch 10 and a three-position liquid flow switch 12 into the cathode chamber 3 of the electrochemical reactor 1, from the output of the cathode chamber 3 through the liquid flow switch 15, the washing solution enters the input of the anode chamber 2 of the electrochemical reactor reactor 1 and from the output of the anode chamber, through line 16, it is supplied to the drain. The movement of the washing liquid through the chambers of the electrochemical reactor dissolves cathode deposits and eliminates the growth of cathode deposits on the diaphragm 4 and the chambers of the electrochemical reactor. Eliminating the build-up of cathode deposits extends the life of the electrochemical reactor and increases the reliability of the device.

The graphic image shows a drawing of the invention - a device for electrochemical water treatment.

Explanation of the elements indicated in the drawing:

1 - electrochemical reactor

2 - anode chamber

3 - cathode chamber

4 - diaphragm

5 - input line

6 - brine pump

7 - brine capacity

8 - pump for washing solution tank

9 - washing solution container

10 - two-position fluid flow switch

11 - jet

12 – switch, synchronous with 15

13 - two-position fluid flow switch

14 - catholyte line

15 – switch, synchronous with 12

16 - anolyte line.

Claims (1)

A device for electrochemical water treatment, containing an electrochemical reactor made in the form of one diaphragm flow-through electrochemical modular element with anode and cathode chambers having inputs in the lower and outputs in the upper parts, a current source connected to the corresponding electrodes of the reactor chambers, a jet, an on-off flow switch liquid at the outlet of the reactor, synchronously operating three-position liquid flow switches installed at the inlet and outlet of the reactor, a pump and a brine tank, characterized in that a two-position liquid flow switch is installed on the input line, the first input of the switch is connected to the brine supply line, the second input the two-position switch is connected to the pump output, and the pump input is connected to the flushing solution container, the first output of the two-position switch is connected to the first input of the first three-position switch and the nozzle.

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