Analysis of intensification methods of heat and mass transfer in the drying process and dewatering features of thermolabile organic materials

Abstract

The traditional ways of intensification of heat and mass transfer in drying materials are analyzed in the article.

Part of the above methods of intensification is implemented in the cameras of compatible processes.

Construction analysis of compatible processes showed that in order to implement active hydrodynamic regime in the chamber during processing high-wet thermally labile materials such as chicken manure, sludge after fermentation process and so on is most advisable to use a mechanical rotor rotating along the axis of the camera. This results in generation of a weighted layer material, separation of large pieces, swirl of the gas flow, reducing adhesion to surfaces of working chamber, constant updating of heat transfer surface.

The author has experimentally proved that you can get these orders of magnitude using a method of compatible drying and dispersion processes by mechanical rotor drying thermally labile high-wet materials:

- heat-transfer coefficient within 900-1200 W/(m²·deg.);

- initial coolant temperature within 600-800 ºC;

- number of heat for evaporation within 3500-4000 kJ/kg of evaporated water;

- average camera strain on evaporated moisture 350-400 kg/(m³·h).