Apparatus for solvent recovery
AssigneePrinotech GmbH
InventorsRainer Haerle, Stephan Krauss
Life of this patent
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Abstract
An apparatus for solvent recovery from a solvent/gas mixture from the exhaust air of systems processing printing, painting or other solvents, wherein the solvent/gas mixture from at least one oil-containing solvent/gas mixture is cooled down to a temperature below the lower condensation temperature of the oil of the solvent mixture using a heat exchanger, wherein a further, second heat exchanger is connected upstream of the heat exchanger, said second heat exchanger cooling the solvent/gas mixture specifically to the condensation temperature of an oil present in the mixture and both heat exchangers produce a recovery unit.
Claims33
An apparatus for solvent recovery from a solvent-gas mixture from exhaust air emanating from a printing, varnishing, or other solvent-processing installation, the apparatus comprising:
- a first heat exchanger for cooling a solvent-gas mixture containing at least one oil down to a temperature below a lower condensation temperature of the oil in the solvent mixture;
- a second heat exchanger, connected upstream of said first heat exchanger, said second heat exchanger cooling down the solvent-gas mixture specifically to the condensation temperature of an oil contained in the mixture;
- and
- said first and second heat exchangers forming a recovery unit for solvent recovery.
A method of recovering at least one solvent from a solvent-gas mixture resulting from a drying process of a print shop machine, which method comprises:
- conducting a solvent-gas mixture originating from a dryer device to a recovery unit, the solvent-gas mixture containing at least two oils;
- conducting the solvent-gas mixture through a plurality of series-connected constituent parts of the recovery unit including:
- first and second heat exchangers;
- thereby guiding the solvent-gas mixture first through the second heat exchanger and then through the first heat exchanger;
- and
- thereby cooling the solvent-gas mixture in the second heat exchanger down specifically to a condensation temperature of an oil;
- and
- thereby cooling the solvent-gas mixture in the first heat exchanger down below the lowest condensation temperature of the solvent-gas mixture having the at least two oils;
- and
- collecting the oil separated out at least in the second heat exchanger.
Dependencies are inferred from the claim text.