CS201681B3 - Connection of the final step of the ventilation system for exhausting detonating air from the area for liquidation of the sodium remainders - Google Patents

Description

The invention relates to the connection of an output stage of a ventilating system for discharging explosive air from a sodium residue disposal space and eliminates the risk of explosion of a hydrogen-air explosive mixture using an explosion hazardous exhaust air vent without special treatment for the transport of explosive air.

In a sodium component cleaning and disposal facility, organic liquids such as methanol, ethanol, Dowanol EB and the like, or more vigorous agents such as water in the form of steam, mist or directly in the liquid phase at the end of the purification process are used in the purification process. . Practically all reactions of the purification process produce not only substances harmful to human health, but also substances hazardous to explosion. The most dangerous of these is the explosive mixture of hydrogen and air. The air is used to remove gaseous products and aerosols from the disposal space that are generated by the reaction of sodium with the above reagents and especially water.

Invention for which it was granted MS. No. 170629 on the connection of equipment for cleaning machine parts from sodium and for the disposal of sodium residues, requires, for safety reasons, the use of a fan in a special design for the transport of explosive air. As is well known, there are only a few fan manufacturers in the world suitable for the transport of explosive air or for the environment containing them. Not only are such fans difficult to access, but their design is very complicated and production

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Since the fluidity of the process can be disrupted by the disposal of sodium, for example by a sudden increase in humidity, there will be a greater evolution of hydrogen and thus a disturbance of the set dilution rate by the suction air, or an increase in the hydrogen content in the disposal space. Passing through this hydrogen-rich mixture may cause an unexpected initiation of its explosion in the ventilator and should be avoided.

The connection of equipment for the cleaning of machinery parts from sodium and for the disposal of sodium residues according to the author's certificate No. 170629 does not prevent hydrogen from penetrating the cleaning process in the disposal area into the fan and the surrounding atmosphere.

The above drawbacks are overcome by connecting the final stage of the venting system for discharging the flue gas from the sodium disposal area of the invention, which involves the inclusion of a catalytic filter with a condensate drain in the end of the apparatus between the dry filter and the ventilator in an explosion hazardous environment. The catalyst filter bed is filled with, for example, platinum or palladium alumina tablets and heated by steam or electrically to remove moisture from the catalyst support *

The attached drawing is a block diagram of an end stage of a ventilation system for evacuating flue gas from the sodium disposal area. The catalytic filter 2, in whose bed there is a charge, for example platinum or palladium alumina heated by a steam or electric heater 5 and equipped with a condensate drain 3, is connected between a dry filter 1 of airborne reaction products 1 and a ventilator 4 explosion. In catalytic filter 2, it is advisable to heat the working space in order to maintain its good efficiency even with low hydrogen concentration in the explosive mixture, when the heat of reaction would not be sufficient to heat the working space. catalyst support capillaries.

Claims (1)

Connection of the exhaust stage of the ventilating system for evacuating air from the residual waste disposal area of machinery parts cleaning equipment, according to the author's certificate No. 170629, characterized in that a catalytic filter (2) is placed between the dry filter (1) and the fan (4). ), in whose bed there is a charge, for example platinum or palladium alumina, heated by a steam or electric heater (5) and the catalytic filter (2) is further provided with a condensate drain (3).