| 摘要 |
<p>It has now been discovered that a gas phase reaction for converting uranium hexafluoride into uranium oxide, in combination with dust collection using a filtration operation and a countercurrent pulsed scrubbing operation with a gas in order to blow the dust to separate it from the filters can be carried out in such a way that the filters are exposed to a very much lower operating temperature as a result of the operation which comprises introducing a sprayed fluid which has a high latent heat of evaporation into the gas containing oxygen which comprises the third gaseous reactive agent in such a way that the sprayed fluid is enveloped or surrounded by the third gaseous reactive agent. The sprayed fluid penetrates the reaction zone without coming into contact with the structure defining the reaction zone and in a location which has approximately the maximum temperature in the reaction zone. Substantially no condensation of the sprayed fluid occurs in the equipment defining the reaction zone and the equipment which defines the dust collection zone intended for the collection of material in the form of particles, and no dust accumulation or clogging of this equipment occurs. The sprayed fluid is preferably selected from fluids having a high latent heat of evaporation, a preferred fluid being water, in particular deionised water. This introduction of a sprayed fluid minimises wetting of the dust, thus preventing dust accumulation in the reaction zone or in the filtering zone.</p> |
