Method for separating a krypton-xenon concentrate and a device for carrying out said method

A device for separating a krypton-xenon concentrate purified with respect to hydrocarbons, comprising:

• a preliminary rectifying column comprising a contact section and a concentration section with an anticipatory assay nipple, the preliminary rectifying column being fed in by a krypton-xenon concentrate line and fed out by a xenon-fraction line and a krypton-fraction line;
• a production-xenon column comprising an evaporating condenser, a thermal converter, and a concentration section with an anticipatory assay nipple, the production-xenon column being fed in by a purified xenon-fraction line and fed out by a xenon-column blowing gases line, wherein the thermal converter is mounted more than the distance between 0.4H and 0.8H above the feed point of the purified xenon-fraction line, wherein H is the height of the concentration section;
• a production-krypton column comprising an evaporating condenser, a thermal converter, and a concentration section with an anticipatory assay nipple, the production-krypton column being fed in by a purified krypton-fraction line and fed out by a krypton-column blowing gases line, the thermal converter being mounted more than the distance between 0.4H and 0.8H above the feed point of the purified krypton-fraction line, wherein H is the height of the concentration section;
• an additional xenon column comprising a xenon concentration unit and a concentration section with an anticipatory assay nipple, an upper zone of the xenon concentration unit being coupled to a purified xenon-fraction-outlet branch pipe, the purified xenon-fraction-outlet branch pipe being coupled to the purified xenon-fraction line, the additional xenon column being fed in by the xenon-fraction line and fed out by the purified xenon-fraction line and a high-boiling-temperature-admixtures line;
• an additional krypton column comprising a concentration section with an anticipatory assay nipple, the additional krypton column being fed in by the krypton-fraction line and fed out by the purified krypton-fraction line and an intermediate admixtures line;
• a krypton recovery column comprising a concentration section with an anticipatory assay nipple, the krypton recovery column being fed in by the krypton-column blowing gases line and fed out by a recovered krypton line and a low-boiling-temperature-admixtures line;
• a purge collection unit, the purge collection unit being coupled to the xenon-column blowing gases line, the high-boiling-temperature-admixtures line, the intermediate admixtures line, the low-boiling-temperature-admixtures line and the recovered krypton line;
• and
• pressure increasing units, wherein the xenon-column blowing gases line, the high-boiling-temperature-admixtures line, the intermediate admixtures line, the low-boiling-temperature-admixtures line and the recovered krypton line are coupled, via the pressure increasing units, to the contact section of the preliminary rectifying column.