DEVICE AND METHOD FOR GAS DRYING Russian patent published in 2014 - IPC B01D53/26 F25B49/02 

FIELD: process engineering.

SUBSTANCE: invention relates to cold cooling of gases. Proposed device comprises heat exchange with first part composed of cooling circuit evaporator. Second part serves to cool gas and to condense water vapours from said gas. Cooling circuit is filled with coolant and comprises compressor, condenser, first expander, bypass pipeline with second expander and control valve controlled by control unit in response to signals from instrumentation. One metre 15 measures the lowest temperature or dew point in heat exchanger second section. Extra metre 16 measure coolant temperature in evaporator. Control unit incorporates algorithm to define if this device operates at zero load or at full load in response to signal from metre 16. At zero load, control unit control the valve in response to signal from extra metre only. At full load, it controls the valve in response to signal from metre 15 only.

EFFECT: efficient gas drying.

17 cl, 2 dwg