Patent ID: 6035791
Filing Date: 2000-03-14
Classification: B27K,C10B,Y02E

Abstract:
A method for the recycling of treated wood that includes the steps of:grinding treated wood into wood chips;introducing said wood chips into an upper section of a vertically disposed reactor column in order to fill said reactor column,subjecting the chips in a lower section of the reactor column to hot gases having a low oxygen content in order to adiabatically heat the wood chips below the ignition point of the wood chips,moving the hot gases upward through said wood chips in the upper section of the reactor column to progressively cool the gases to a temperature below the condensation temperature of the gases and deposit condensed particulates in the form of heavy metals on said wood chips,evacuating gases free of heavy metals out of the reactor column, andrecovering wood charcoal from the reactor column.