Modular system and process of drying solids and liquid-solid mixtures

A modular system for drying solid materials and liquid-solid mixtures, comprising:

• a drier housing (100) having a material inlet (101), a material outlet (104), one or more drying gas inlets (106), a drying gas outlet (105) and at least one drying chamber (108′, 108″),
• a particle separator positioned downstream of the at least one drying chamber (108′, 108″),
• a fan (203) configured to blow drying air into the drier housing (100), and
• a heater (206) for heating drying air prior to entering the drier housing (100), wherein the system further comprises
• a closed loop gas duct (200) connecting the drying gas inlet (106) and drying gas outlet (105),
• a condenser (300) positioned in the gas duct (200),
• a bypass duct (201) with a bypass valve (202) connected to the gas duct (200) upstream and downstream of the condenser (300) to optionally allow flow through the gas duct (200) to bypass of the condenser (300),
• a time- or electric-magnetic-controlled relief valve bleeder (204) positioned in gas duct (200) to remove vapor and non-condensable gases from the drying loop, wherein
• the at least one drying chamber (108′, 108″) further comprises a rotary impeller and dis-integrator (102) proximate the bottom of the drier housing (100), and the one or more drying gas inlets (106′, 106″) in the side wall proximate the bottom of the at least one drying chamber (108′, 108″) configured to inject drying gas in a substantially horizontal direction into the at least one drying chamber (108′, 108″).