SU1460805A1 - Installation for cleaning equipment from activated alkali metals - Google Patents

Description

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The invention relates to the cleaning of surfaces from activated contaminants such as alkali metals.

The aim of the invention is to improve the quality of cleaning and reduce the yield of active waste.

The drawing shows a schematic diagram of the installation.

The installation includes a chamber 1, a regeneration circuit for the washing solution, including eMKoctb for collecting washing liquid 2, and an electrolyzer 3, which consists of a housing, a non-electrode 4 cathode 5 and anode 6 chambers. The cathode chamber 5 is connected with a cooled buffer tank 7, and the anode chamber with a cooled tank 8. The cathode exchange membranes 9 and 10 are tightly pressed against the cathode 11 and the anode t2, respectively. Cathode 5 and Anodna 6 chambers are equipped with nozzy water supply nozzles 13 and 14 and output tubes of gaseous products 15–16.

The mouth works as follows.

. Launched equipment or disposable solid waste is placed in Eamfu points 1, creates a vacuum or vacuum in it and delivers a mild liquid, such as water. The solution obtained by the interaction of the chain metal with water enters the collection of washing liquid 2 from it — into the interelectrode chamber of 4 electrostere 3. Under the action of an electrical voltage applied to the porous cathode 11 and the anode 12, alkali metals and impurities are heated to the cathode 11 and passed through the cation membrane 9 to the ca- pane; water chamber 5, where the discharge of water ions occurs with the formation of alkali hydrogen. The alkali solution is subjected to continuous circulation in a closed circuit through a buffer tank 7 with cooling. Incorporated hydrogen is removed through nozzle 15.

Thus, an alkaline concentration contour, a metal a and a mixture, is created, from which the solution is withdrawn when the desired concentration is reached by alkali. The filling and feeding of the circuit is carried out with distilled water through the nozzle 13.

The anions migrating to the anode 12 meet on their way a cation-exchange membrane 10, through which they

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cannot pass, and remain in solution passing through the inter-electrode chamber 4. The cation-depleted solution from the interelectrode chamber A is fed to the cleaning chamber 1 for washing. The cycle of the cleaning circuit closes.

Since anions cannot reach the anode and become discharged, they remain in solution, and a number of water ions with oxygen are released at the anode. Water is fed through the pipe 14 into the anode chamber. Released oxygen is removed through the nozzle 16. The solution in the circuit is circulated through a buffer tank 8 with cooling. This solution, enriched with hydrogen ions, can be used to feed the working solution.

Thus, the electrode reactions proceed mainly in the pores of the electrodes, and the reaction products are diverted into the electrode chambers, do not create additional electrical: surveys in the interelectrode space and allow to reduce the interelectrode distance. The interelectrode chamber 4 can be made so as to increase the residence time of the race under the action of current, i.e. reduce; electrical costs and improve the quality of the treatment solution. Carbon-graphite materials with good electrical characteristics and low cost can be used as porous electrodes .;

In the installation, the washing liquid is not. is in contact with the electrodes and therefore i is not polluted by the products of destruction of the anode, and the gaseous products of electrolysis are easily removed in the native chambers without causing gas fields, and the solution in the inter electrode cavity. In addition, the washing fluid circulating through the interelectrode chamber is continuously acidified. In the anode chamber, the circulating fluid is not contaminated with radionuclides and can be used for cleaning instead of distilled water. V. all this has allowed; It improves the quality of cleaning and reduces the yield of active waste. F o rm u l a i b o te n i

1. Installation for cleaning equipment from activated alkali metals, containing a cleaning chamber, a circuit for regenerating the washing solution, including an intermediate tank for

31460805

collecting the washing liquid, connected to the c. interdelectrode chamber, while the inlet-cleaning chamber, and the means of the cleaning pipe of the means of cleaning the washing cleaning liquid from alkali metals liquid binds the inter-electrode with the inlet and outlet pipes, , tew, and the outlet of the means in order to improve the quality of cleaning the cleaning liquid binds and reduce the yield of active waste, the interelectrode part of the body with the chamber is equipped with two cooling drums, one Fern of buffer capacitances with vhodnmi and output-yuemkostey their associated spigots iymi nozzles, and means ochistkis cathode chamber, and the other is bonded noyutsey VIDES liquid formed in the anode chamber and the electrolysis cell has additionally comprising a housing, | The connecting tube for connecting the buffer is a porous anode and a cathode, and two cation-capacities with an outlet nozzle. (exchange membranes, moreover, the anode and the cleaning fluid cleaning fluid, the tube is placed in the housing with separation-2. The installation according to claim 1, from l and - its cavity into three parts: interfacial with the fact that The source, cathode and anode chambers, the cathode chambers are equipped with branch pipes A. Hatiomobmeknye membranes are tightly fed with distillation and pressed X to the anode and cathode from the water side.

Claims (2)

Claim 1. Installation for cleaning equipment from activated alkali metals, containing a cleaning chamber, a circuit for the regeneration of a washing solution, including an intermediate container for collecting washing liquid associated with. a cleaning chamber, and a means for cleaning the cleaning liquid from alkali metals with inlet and outlet pipes, characterized in that, in order to improve the quality of cleaning and reduce the yield of active waste, it is equipped with two cooled buffer tanks with inlet and outlet pipes, and a cleaning agent for the washing liquid made in the form of an electrolyzer, comprising a housing, a porous anode and cathode, and two cation-exchange membranes, the anode and cathode placed in the housing with the separation of its cavity into three parts: inter-electrode, cathode and anode y'kamera, a. cation exchange membranes are tightly pressed to the anode and cathode from the side; the interelectrode chamber, while the inlet pipe of the washing liquid purifier connects the interelectrode part of the casing with the intermediate tank, and the outlet pipe of the washing liquid purifier connects the interelectrode part of the casing with the cleaning chamber, with one ne buffer tanks connected to the cathode chamber and the other connected to the anode chamber and has an additional pipe for connecting the buffer tank with the output pipe medium. (for cleaning the washing liquid. 2. The apparatus according to claim 1, wherein the anode and cathode chambers are equipped with nozzles for supplying distilled water to them.