subject: Wood Drying Plant And A Method Of Purifying A Drying Gas From A Wood Drying Device [print this page] A wood drying plant comprising a wood drying equipment and a purifying device which is arranged to receive a drying gas from the wood drying device, the drying gas comprising water steam and volatilized organic components, wherein the purifying device comprises at least one condenser device which is arranged to separate relatively difficultly volatilized components and relatively easily volatilized components from the drying gas by condensing the relatively difficultly condensed components; a separating device which is arranged to separate said organic components and a rest material from the relatively difficultly volatilized components; and a transferring device which is arranged to transfer organic components present in the rest material from the rest material to the wood dry equipments.
During wood dry equipments, organic compounds, such as terpenes, are emitted from the wood material in addition to water. Drying gases containing these organic compounds have until approximately ten years ago been discharged directly to the surrounding environment. However, the terpenes there react with nitrogen monoxide and form ozone close to the ground, which has a negative effect upon the vegetation. Ozone close to the ground causes serious damage to woods and also in the long term leads to the death of forests. In recent years the problems with ozone have been noted and measures have been taken to develop plants and methods that contribute to avoiding the production of ozone close to the ground.
The present invention relates to a wood drying plant comprising a wood drying equipment and a purifying device which is arranged to receive a drying gas from the wood drying device, said drying gas comprising water steam, volatilized organic components such as terpenes, and possibly glue rests, such as formaldehyde, and a method of purifying a drying gas from a wood dry equipments, said drying gas comprising water steam, volatilized organic components such as terpenes and possibly glue rests such as formaldehyde.
