NOVELTY - A device comprises a continuously operating moving bed reactor, like a double-walled screw reactor (11), in which wood is heated, dried and pyrolysed. The screw reactor has a front opening (15) in conveying direction (x) for removing charcoal, and another opening (14) for removing charcoal. The screw reactor is connected with an oven (18) for complete combustion of pyrolysis gas. The oven is provided with an exhaust gas-air-heat exchanger (20), where a device (T) subordinates the exhaust gas-air-heat exchanger for generation of electrical current.    USE - Device for thermochemical conversion of wood.    ADVANTAGE - The device provides complete and improved thermochemical conversion of wood in a cost-effective manner without wasting produced heat.    DETAILED DESCRIPTION - A device comprises a continuously operating moving bed reactor, like a double-walled screw reactor, in which wood is heated, dried and pyrolysed by air seal. The screw reactor has a front opening in conveying direction for removing charcoal, and another opening for removing charcoal. The screw reactor is connected with an oven for complete combustion of pyrolysis gas. The oven is provided with an exhaust gas-air-heat exchanger, where a device subordinates the exhaust gas-air-heat exchanger for generation of electrical current. The device comprises a hot air turbine for generation of electrical current. The exhaust gas-air-heat exchanger is connected with the hot air turbine to guide the exhaust-air-heat exchanger and to guide air to the hot air turbine. The hot air turbine is connected with an oven (19) to supply a part of exhaust air or the hot air turbine of a combustion chamber (17) of the oven. An INDEPENDENT CLAIM is also included for a method for thermochemical conversion of wood, which involves supplying air into the oven associated with exhaust gas-air-heat exchanger.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the device for thermochemical conversion of wood.    Double-walled screw reactor (11)    Openings (14,15)    Combustion chamber (17)    Ovens (18,19)    Exhaust gas-air-heat exchanger (20)    Device (T)    Conveying direction (x)