FIELD: gas treatment.
SUBSTANCE: method for drying compressed gas using a drying device (1) having an inlet (7) for dried compressed gas and an outlet (8) for dried compressed gas, in which the drying device (1) contains at least two vessels (2) filled with regenerated dryer. The invention relates to a method for drying compressed gas. A method is proposed for drying compressed gas using a drying device having an inlet for the compressed gas to be dried and an outlet for the dried compressed gas. The drying device contains at least two vessels filled with a regenerated dryer and an adjustable valve system consisting of a first valve block and a second valve block that connects the above inlet and outlet to the above mentioned vessels. The variable valve system is controlled in such a way that at least one vessel will dry the compressed gas while the other vessel will be successively regenerated and cooled. By adjusting the valve system, the vessels will each in turn the compressed gas. The method includes calculating the period of time (tads) during which the vessel dries the compressed gas, based on the formula: tads=A×B; where: tads is the period of time during which the vessel (2) drains the compressed gas; A is the given adsorption time; B is the product of one or more of the following factors: CΔP is the correction factor for the average pressure drop (ΔPgem) in the dryer compared to the reference pressure drop (ΔPref) in the drying device; CP is the correction factor for the mean inlet pressure (Pgem) compared to the reference inlet pressure (Pref); CT is the correction factor for the mean inlet temperature (Tgem) compared to the reference inlet temperature (Tref); C is the fixed correction factor; where is the reference pressure drop (ΔPref), reference inlet pressure (Pref) and reference inlet temperature (Tref) are values measured or determined in the dryer operating at reference conditions, where B includes at least a CP factor, where for CP the following formula is used: CP = Pgem/Pref where Pref is the reference inlet pressure (Pref) and Pgem is the average inlet pressure (Pgem) measured over the drying cycle.
EFFECT: drying of compressed gas.
5 cl, 1 dwg
