METHOD AND DEVICE FOR CONTINUOUS THERMAL HYDROLYSIS WITH RECOVERED STEAM RECIRCULATION Russian patent published in 2018 - IPC C02F11/18 C02F11/12 

FIELD: chemistry.

SUBSTANCE: group of inventions refers to the continuous thermal hydrolysis of slurries and can be used in power engineering, processing technologies and slurry utilization. Method for the continuous thermal hydrolysis of a slurry containing an organic substance includes the steps of: dewatering and homogenizing the slurry, simultaneously inject the recovered water vapour into the slurry and mix, a primary homogeneous mixture is obtained, a primary homogeneous mixture is simultaneously fed and fresh water vapour is injected, stirring, a secondary homogeneous mixture is obtained, a secondary homogeneous mixture is fed under pressure and provide a substantially piston flow regime for a time and at a temperature sufficient for thermal hydrolysis of the organic material, recovered water vapour is obtained, the secondary homogeneous mixture is cooled to a temperature allowing subsequent decomposition of the hydrolysed organic matter contained therein. Device comprises at least one primary dynamic mixer injector 5, means for feeding slurry 4 and recovered water vapour 10, at least one secondary dynamic mixer injector 12, means for supplying a primary homogeneous mixture 11 and fresh water vapour 100, a tubular reactor 14 for thermal hydrolysis, means for producing recovered water vapour 1000, means for cooling the secondary homogeneous mixture. Each primary 5 and secondary 12 dynamic mixer injectors contain a chamber and a rotor with blades.

EFFECT: inventions make it possible to treat slurries with an increased content of solids without reducing their decomposition rates, to obtain uniform temperatures in the mixture from slurry and steam, provide high rates of thermal hydrolysis, eliminate mechanical stresses, reduce energy consumption and steam flow, use smaller reactors, ensure optimal condensation of water vapour in the sludge, and also - hygienisation of the sludge.

22 cl, 19 dwg