摘要:
A process for treatment of wood susceptible to damage and having a length that is over the critical length with a fluid under high pressure is disclosed. The process is conducted in a way so that the fluid is not allowed to enter into the liquid form inside the wood. In one embodiment the process is performed in a way so the temperature during the pressurizing is not allowed to exceed the plastification temperature of the wood. In this embodiment the rate of damages of the wood is even further reduced.
摘要:
The present invention relates to a method of treating a material contained in a vessel. This method involves a fluid present in the vessel and comprises at least one pressurisation step in which the pressure in the vessel is increased and at least one depressurisation step in which the pressure in the vessel is decreased. The invention further relates to an apparatus for executing this method and the products obtained by this method.
摘要:
A process for treatment of wood susceptible to damage and having a length that is over the critical length with a fluid under high pressure is disclosed. The process is conducted in a way so that the fluid is not allowed to enter into the liquid form inside the wood. In one embodiment the process is performed in a way so the temperature during the pressurizing is not allowed to exceed the plastification temperature of the wood. In this embodiment the rate of damages of the wood is even further reduced.
摘要:
Steam is discharged onto a carcass surface from a plurality of steam discharge jets, and impurities, steam and condensate are drawn in from the surface through a plurality of suction nozzles adapted to following an uneven surface of the carcass. A cleaning device for cleaning the surface comprises steam discharge jets and suction nozzles adapted to following an uneven surface of the carcass. Jets and nozzles may be combined into nozzle arrangements adapted to deflect resiliently. Nozzle arrangements may be made from a hose having a central lumen and a number of narrow channels embedded into the hose wall. A cleaning machine may incorporate the cleaning device as well as automated machinery for sweeping it across the carcass surface.
摘要:
In impregnating or extracting treatments of resin-containing wood substrates using a resin-soluble supercritical fluid as delivering or extractive solvent medium problems due to exudation of resin from the wood substrate at pressure release necessary before the termination of the treatment are avoided or reduced by a controlled pulsating pressure release down to atmospheric pressure. Thereby the total process time can be substantially reduced.
摘要:
The impregnating or extracting treatments of resin-containing wood substrate using a resin-soluble supercritical fluid as delivering or extractive solvent medium problems due to exudation of resin from the wood substrate at pressure release necessary before the termination of the treatment are avoided or reduced by displacing at least partially the supercritical fluid by a fluid of relatively low solubility in the resin before pressure release down to atmospheric pressure is terminated, thereby the total process time can be substantially reduced.