SHELL-AND-TUBE JET-STREAM FERMENTER Russian patent published in 2007 - IPC A23L2/54 B01F5/04 

FIELD: microbiological and food-processing industry, in particular, equipment for aerobic cultivation of bakery yeast and other unicells.

SUBSTANCE: shell-and-tube jet stream fermenter has heat-exchanger-aerator, accumulating reservoir positioned under heat-exchanger-aerator, and circulation pump. Heat-exchanger-aerator has casing, vertical drop-type, lifting and drain pipes, and main nozzle positioned above drop-type pipe. Additional nozzle is positioned in axially aligned relation with and above drop-type pipe. Lower end of drain pipe extends beyond lower cover by distance making at least 0.5 the length of lifting pipe and is axially connected to upper art of accumulating reservoir. Diameter of additional nozzle opening is smaller than diameter of main nozzle opening by at least 1.2 times and no more than by 1.8 times, and ratio of length L_o of nozzles to their diameter d_o is at least 10. Outlet section of main nozzle is arranged at the level not below axis of gas supply branch pipe.

EFFECT: increased efficiency and enhanced reliability in operation.

2 dwg