FILTER APPARATUS AND METHOD FOR PURIFYING A GAS FLOW

摘要

In a filter device for filtering a gas flow containing impurities there is provided an adsorption filter unit (34) which comprises a filter medium (40) and through which the gas flow can pass such that the gas flow comes into contact with the filter medium (40), wherein the filter medium (40) adsorbs impurities at an adsorption temperature in an adsorption temperature range, and desorbs the impurities again at a desorption temperature in a desorption temperature range. By means of at least one regeneration device (54), the filter medium (40) can be set to a desorption temperature such that the filter medium (40) is purged of previously adsorbed impurities. The adsorption filter unit (34) comprises at least one first filter module (88; 36) and one second filter module (88; 36) each with a separate module housing (38), in each of which a filter medium (40) is provided and through each of which the gas flow can pass. The regeneration device (54) is furthermore designed such that the first filter module (88; 36) can be regenerated independently of the second filter module (88; 36). Also specified is a method for purifying a gas flow conducted in a circuit, in which method the gas flow is conducted through at least one adsorption filter device (34) with a filter medium (40).