Evaporation of waters - Import export

Various heater types available, eciency and robustness characterise directly heated drum dryers by Büttner. They are used for drying wood particles, strands, sugar beet pulp and all free-owing types of wood, biomasses and bulk solids Features Water evaporation capacity of up to 80 t/h depending on the product Direct heating system with multi-fuel burners in combustion chambers Direct heating system using ue gases from energy plants Direct heating system using waste gases from turbines or engines All combinations of these types of heaters are possible. A ash tube may be used for pre-drying and oversize separation of material that is quite moist. Material separation via cyclones or drop boxes Function The material to be dried is admitted through an air-tight rotary air lock into a rotating single-pass drum dryer. The dryer drum can be tted with specic internal ights to suit the material to be dried. This results in an increase in surface area and thus an increase in eciency

Büttner's fash-tube dryers are most versatile and extremely ecient. The dryer systems are used for drying material having high levels of surface moisture or a specic surface area. They are, for example, used to pre-dry wood akes before they are conveyed into drum dryers. Flash tube dryers are also used as the principal dryers for drying bres to be used in MDF production. For many years Büttner's ash tube dryers have been in operation successfully in many dierent industrial sectors all over the world Features Water evaporation of up to more than 70 t/h per unit depending on the product Drying within just a few seconds, the material is then already mechanically separated and conveyed to the downstream drum dryer. Flash tube dryers may be heated in many dierent ways, for example: Flue gas from grate ring Büttner gas line burners Hot gas from gas turbines or gas motors Indirectly by heat exchangers for steam or thermal oil Any combination of the heating methods mentioned above