RU2056364C1 - Installation for electrochemical treatment of water - Google Patents

Abstract

FIELD: sterilization of medical tools. SUBSTANCE: installation comprises two electrochemical cells, each divided by a diaphragm into an anodic chamber and a cathodic chamber, connected in succession along the flow of treated water by unlike electrode chambers. The feedwater inlet pipe is connected to anodic chamber and, via an adjusting valve, with the cathodic chamber of the first cell. The spent water outlet pipe is disposed in the cathodic chamber of the second cell. The gas separator and a container with dechlorinating catalyst are positioned in succession after the water outlet pipe from the anodic chamber of the first cell on the cathode chamber water supply line and, through the adjusting valve, into the anode chamber of the second cell. The additional container with catalyst is disposed on the anodic chamber water outlet line of the second cell. The additional container is connected at the inlet with the gas separator gas outlet and with the water outlet pipe from the cathodic chamber of the first cell. Catalyst in the dechlorination container consists of carbon-oxide-manganese. EFFECT: improved design. 2 cl, 1 dwg

Description

 The invention relates to chemical technology and can be used in processes associated with the electrochemical regulation of acid-base, redox properties and catalytic activity of water, in particular when washing pharmaceutical dishes electrochemically treated with water.

In applied electrochemistry, various types of plants are used that provide water treatment. A device for water treatment containing a container with a cathode and anodes separated by a diaphragm, water inlet pipes to the anode chamber, overflow from the anode chamber to the cathode and the outlet of purified water from the cathode chamber [1]
The known device does not provide for the possibility of lowering the salinity of the treated water. In addition, due to the flow of water sequentially through the electrode chambers of the same electrolyzer due to migration through the diaphragm and neutralization of the products of electrode reactions, the degree of current use is small.

A technical solution is known that is used for water treatment and consists in sequentially passing the treated water through two diaphragm electrolysers connected in series. Water enters first into the cathode chamber of the first electrolyzer, and then into the anode chamber of the second of which it is supplied to the consumer [2]
The disadvantages of the known technical solutions are significant energy consumption, a sequence of operations that does not allow the use of ongoing processes to obtain solutions of various characteristics.

 The purpose of the invention is the reduction of energy consumption during the processing, increasing the degree of purification and providing the possibility of simultaneous production of an acid solution, which can be used for prophylactic cleaning of electrolyzers and other purposes.

 This goal is achieved through the use of an installation containing two electrochemical cells separated by diaphragms into cathode and anode chambers and connected in series along the treated water by unlike electrode chambers, pipes for supplying and discharging treated water, and an overflow pipe. The input pipe of the treated water is connected to the anode chamber of the first electrochemical cell and through a control valve with the cathode chamber of the same cell. The overflow pipe from the anode chamber of the first cell to the cathode chamber of the second cell through a control valve is also connected to the anode chamber of the second cell and further comprises a gas separator and a container with a carbon-oxide-manganese catalyst arranged in series behind the anode chamber. The installation further comprises a second container with a catalyst connected to the outlet pipes from the anode chamber of the second cell. Before entering the chamber with the catalyst, the nozzle is connected to the outlet of the gas separator and the outlet nozzle from the cathode chamber of the first cell. The outlet pipe of the treated water is installed in the cathode chamber of the second cell.

 The drawing shows a device for electrochemical water treatment.

 The device contains a source 1 of treated water, flow controllers 2 and 3 installed on the water supply lines to the cathode chamber of the first electrochemical cell 4 and the anode chamber of the second electrochemical cell 5. A gas separator 6 is installed on the water outlet line that has been processed in the anode chamber of the first electrochemical cell 4 There are tanks 7 and 8 with catalysts, as well as the outlet pipe 9.

 The device operates as follows.

The treated water from the source 1 is fed into the anode and cathode chambers of the first electrochemical cell 4. By means of the water flow controller 2, a part of the total outflow of the treated water is supplied to the cathode chamber of this electrochemical cell. When passing through the anode chamber, ions Na ⁺ , K ⁺ , Ca ²⁺ , Mo ² +, Fe ²⁺ , F ³⁺ and other cations pass into the cathode chamber. Chlorine formed in the anode chamber of the electrochemical cell 4 is separated from the treated water stream in the gas separator 6. The active chlorine compounds formed during electrolysis are destroyed in the tank 7. Upon passage through the catalyst, additional oxidation of organic substances occurs. After the passage of the container 7 with the catalyst, the main water stream is supplied to the anode chamber of the second electrochemical cell 5, where additional water treatment occurs due to the transition of the second electrochemical cell 5 of the SO anions to the cathode chamber $\genfrac{}{}{0ex}{}{\text{2-}}{\text{4}}$ , Cl ^- , CO $\genfrac{}{}{0ex}{}{\text{2-}}{\text{3}}$ HCO $\genfrac{}{}{0ex}{}{\text{-}}{\text{3}}$ . A portion of the total flow of treated water is also supplied to the cathode chamber through the regulator 3 of the water flow. Treated water at the outlet pipe 9 is supplied to the consumer. Water treated in the cathode chamber of the first electrochemical cell 4 and in the anode chamber of the second cell 5, as well as the gas separated in the gas separator 6, is sold in a container 8 with a catalyst, where hydrochloric acid is formed, which can be used when washing the electrochemical cells, as well as be used for any other purpose.

 The proposed device eliminates the stage of mechanical removal of contaminants, reduces the consumption of synthetic detergents, and reduces the processing time for dishes from all types of contaminants.

Claims (2)

 1. INSTALLATION FOR ELECTROCHEMICAL WATER TREATMENT, containing two electrochemical cells, each of which is divided by a diaphragm into the anode and cathode chambers, connected in series along the treated water by unlike electrode chambers, water supply pipes, water inlet and outlet pipes from the anode and cathode chambers, the outlet pipe of the treated water, the water supply line, characterized in that the source pipe of the input water is connected to the anode chamber and through a control valve to the cathode chamber of the first cell and The tank contains a gas separator and a container with a dechlorination catalyst, sequentially located behind the water outlet pipe from the anode chamber of the first cell on the water supply line to the cathode chamber and through a control valve into the anode chamber of the second cell, as well as an additional container with a catalyst placed on the water outlet line from the anode chamber of the second cell, the additional capacity at the inlet connected to the gas outlet of the gas separator and the outlet pipe of water from the cathode chamber of the first cell, and the outlet pipe is processed water is located in the cathode chamber of the second cell.  2. Installation according to claim 1, characterized in that it contains a carbon-oxide-manganese catalyst as a catalyst in the dechlorination tank.

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