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Bipolar electrolysis unit for obtaining hydrogen and oxygen mixture

Bipolar electrolysis unit for obtaining hydrogen and oxygen mixture
IPC classes for russian patent Bipolar electrolysis unit for obtaining hydrogen and oxygen mixture (RU 2476623):
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FIELD: metallurgy.

SUBSTANCE: bipolar electrolysis unit includes a block of electrodes equally spaced from each other and provided with holes for passage of hydrogen-oxygen mixture and electrolyte. Block of electrodes is placed in a shell from dielectric material. Shell encloses the electrodes without any gaps. The shell is submerged into the housing of electrolysis unit with electrolyte. At the same time, the housing with electrolyte can contain at least one additional block of electrodes in shells. Blocks of electrodes are electrically connected to each other in parallel or in series.

EFFECT: improvement of an electrolysis unit.

2 cl, 3 dwg

 

The invention relates to a gas-flame processing of materials hydrogen-oxygen flame with obtaining a hydrogen-oxygen mixture by electrolysis of water directly at the welding place.

Famous bipolar electrolyzers have a filter pressnow or box design (Korzh, V., Dihno S.L. metal hydrogen-oxygen flame. Kyiv: Tekhnika, 1985 - 64 S.; Yakimenko L.M., Mogilevskaya I.A., Tkachuk Z.A. water Electrolysis - M.: Chemistry, 1970-263 C.). Gasket in the filter Presnya and housing box of pots made of dielectric (typically polymeric) materials. All such materials have low thermal conductivity. Therefore, to ensure adequate cooling of the electrolyte directly into the cell difficult. This disadvantage of all known filter Presnya and a box of cells leads to the fact that water electrolysis generators (the term "electrolysis water generator" - according to GOST 2601-84, term No. 160) or get overly bulky and heavy, or could not work without interruption - overheat.

An attempt to resolve this issue made in the invention by the patent RF №2065803 class. UK 5/00, taken as a prototype. It is proposed, in essence, box electrolysis, in which the body is a metal pipe, covered inside the dielectric layer, and a round flat electrodes of the divided one from another annular insulating spacers. With this design, the thickness of the dielectric coating of the pipe several times less than the wall thickness of the usual box of the cell, since the cover only provides isolation of the electrodes from a metal pipe, thermal conductivity of the material of which an order of magnitude greater than any of the dielectric. The role of the grooves of the flat top of a bipolar electrolyzer in this construction is played distances between the ring gaskets. But if the electrolyzer traditional box design is bound to have gaps between the electrodes and the walls of the grooves, the electrodes with collavini strips can be assembled without gaps. Due to this, the radial size of the pads can be greatly reduced in comparison with the depth of the grooves, thereby improving heat removal from the electrolyte. However, the intensity of heat removal from the electrolyte is still insufficient due to the low thermal conductivity of the material ring seals.

Features bipolar electrolytic cell in which the unit distanceremaining apart electrodes placed in the glass of the dielectric material and immersed in the electrolyte, in the case of the electrolyzer. Dielectric glass block covers without gaps electrodes on the perimeter. The glass can be made of fluoroplastic film or other chemically resistant dielectric. In the housing wall electrolysis is and has holes for the leads to the electrode Assembly, the output of the hydrogen-oxygen mixture and replenishment of the electrolyte body. Distancing electrodes provide three local dielectric inserts (for example, a polymeric rivet on the electrode), remote from its perimeter.

This design allows to make the dielectric glass fine because the pressure inside and outside of the block is almost the same. Consequently, thermal resistance of the shell so that the temperature difference between its surfaces does not exceed 10°C.

For explanations of the described invention figure 1 shows a diagram of the cell, figure 2 - diagram of the cell with the metal case figure 3 - diagram of the electrolytic cell connected in series with two blocks of electrodes in dielectric glasses.

As can be seen from figure 1, the electrolytic cell consists of a block distanceremaining apart electrodes 2 and covering a block of dielectric glass 3, is immersed in the electrolyte 4 in the housing 5. Current to terminal electrodes of the unit 2 summed isolated from the outside conductors 6, missing in the electrolyte 4 through the inputs 7. Through pipe 8 of the housing 5 out of hydrogen-oxygen mixture, and through the pipe 1 case replenish the electrolyte.

If the metal housing 5, as shown in figure 2, the unit 2 can be brought only the positive wire 6 from the power source, connecting the terminal electrode, closed Cup. While the negative lead from the power source attached to the housing 5 (if you change the polarity, i.e. the risk of anode corrosion damage to the shell of the cell).

In case 5 with the electrolyte can be placed two or more shells with blocks of electrodes at the same time, connecting them electrically in series or in parallel. Figure 3 shows a diagram of the electrolytic cell connected in series with two blocks of electrodes 2 in dielectric glasses 3.

In accordance with the suggested were manufactured several models of water electrolysis generators from 5 to 15 kV·a, which could operate continuously for several hours with a maximum for each generator capacity for gas (before refueling).

1. Bipolar electrolyzer to obtain a mixture of hydrogen and oxygen by electrolysis of water at a gas-flame processing of materials, comprising a housing with electrolyte, block distanceremaining apart electrodes with holes for the passage of hydrogen-oxygen mixture and the electrolyte, and conductors for supplying current to the electrodes, characterized in that the block of electrodes immersed in the electrolyte, is placed in the glass of the dielectric material covering the electrodes with no gaps and which is immersed in the body with the electrolyte, and guides the La supply voltage connected to terminal electrodes of the block.

2. The electrolyzer according to claim 1, characterized in that in the case with electrolyte immersed additionally, at least one dielectric glass electrode block, and the blocks of electrodes connected in parallel or sequentially.

 

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