Method and plant for cleaning dryer exhaust gases during the drying of wood chips, wood fiber of the like
AssigneesBison-Werke Baehre, Greten GmbH & Co. KG
InventorsWerner Bartling, Fritz H. Jagode
Life of this patent
Estimating the term…
Abstract
A method of cleaning dryer exhaust gases during the drying of wood chips, wood fibers and the like is described in which at least one part of the dryer exhaust gases is filtered at a temperature lying above its dew point. At least one part of the particles which are filtered out in this way is conveyed, together with flushing air which likewise has a temperature above the dew point, substantially continuously into a combustion chamber and is burned there for hot gas generation.
Claims15
A method of cleaning dryer exhaust gases during drying of wood chips, wood fibers or the like by means of hot gases generated in a combustion chamber, wherein the dried material is separated from the dryer exhaust gases and provision is made for the filtering of the dryer exhaust gases, characterised in that at least a part of the dryer exhaust gases is filtered at a temperature above its dew point in filter hoses, filter sacks or the like;
- and in that at least a part of the particles which are filtered out thereby are conveyed, together with flushing air which serves to clean the filter hoses, sacks or the like and which has a temperature above the dew point, substantially continuously into a combustion chamber for the generation of hot gases and is burned.
A plant for cleaning dryer exhaust gases comprising a combustion chamber, a dryer connected with the combustion chamber via a hot gas duct and provided at its input side with a supply unit, a transport duct connected with the dryer outlet and provided with a conveyor fan, and a separating apparatus with a transport duct which opens into a filter apparatus, characterised in that the transport duct (13) which connects the separator apparatus (11) and the filter apparatus (16) is arranged to receive dryer exhaust gases lying above the dew point;
- in that the filter apparatus (16) is insulated against environmental temperature effects;
- and in that between the filter apparatus (16) and the combustion chamber (1) there is arranged a transport duct (31) for the filtered out particles for conveying them to in the combustion chamber (1) for combustion therein, the transport duct including a fan (30) for the filter flushing air.
Dependencies are inferred from the claim text.