NOVELTY - The method comprises feeding a finely divided lignocellulosic material with the aid of a compressing and air displacing feeding device (2) to a gastight jacketed drying device (3) and then into an oxygen free jacketed torrefication chamber (4). The main part of water contained in the material is evaporated and removed from the device as vapor caused by a temperature of 100 degrees C inside the drying device. The material present under the influence of a temperature within the interval of 270-300 degrees C, is converted into torreficated lignocellulosic material.    USE - The method is useful for manufacturing of torreficated lignocellulosic material.    ADVANTAGE - The method is capable of economically and easily manufacturing an elegant torreficated lignocellulosic material with high quality and without get affected by weather and wind or storage conditions, and minimizes the energy consumption and escape of organic gases from the lignocellulosic material.    DETAILED DESCRIPTION - The method comprises feeding a finely divided lignocellulosic material with the aid of a compressing and air displacing feeding device (2) to a gastight jacketed drying device (3) and then into an oxygen free jacketed torrefication chamber (4). The main part of water contained in the material is evaporated and removed from the device as vapor caused by a temperature of 100 degrees C inside the drying device. The material present under the influence of a temperature within the interval of 270-300 degrees C, is converted into torreficated lignocellulosic material under simultaneous escape of combustible organic gases. The torreficated lignocellulosic material at a treatment temperature and in the absence of penetrating gases, is fed to a cooling device (7). The temperature of the torreficated lignocellulosic material is reduced to 150 degrees C. The torreficated lignocellulosic material is exhausted from the cooling device in order to be recovered at atmospheric pressure and surrounding temperature. The escaped combustible organic gases are transported from inside the jacketed torrefication chamber to an oven, where the organic gases are combusted under generation of flue gases rich in energy. An external energy carrier used as steam at overpressure is introduced into the jacket of the torrefication chamber at a temperature exceeding the torrefication temperature and which is brought to pass through the jacket and to leave the jacketed torrefication chamber at a temperature below the torrefication temperature for further transport into the jacket of the drying device and passage through that jacket while emitting the necessary energy for evaporation of water from newly added lignocellulosic material thus leading to that the medium leaves the jacket of the drying device intact as steam of comparatively low temperature or leaves the jacket in condensed form as water having a temperature of 100 degrees C or slightly below. The steam at overpressure on its way from a steam boiler to the torrefication chamber is exposed to a temperature increasing indirect heat exchange. The vapor temperature exceeds to a value of 280-320 degrees C. The energy emitting medium is comprised of flue gases from the combustion oven leading to a steam temperature of exceeding 280-320 degrees C. The energy content of the flue gases are transferred indirectly through heat exchange, in a first step to the passing steam at overpressure, and to the circulating hot water such as district heating water, after which the flue gases are let out through a funnel. A part of the flue gases on their way to a first heat exchanger (9) are diverted around that and are introduced into the flue gas stream into a second heat exchanger. The gases such as water vapor evaporated from the lignocellulosic material during the drying process are fed to a condenser. The cooling medium is comprised of circulating hot water such as district heating water for the formation of condensate water at a temperature slightly exceeding the temperature of the circulating hot water, where the condensate water is transported to a collection place. The gases of organic origin, which do not condensate simultaneously with the water vapor, are fed from the condenser and are mixed with atmospheric air, which mixture with a principle content of atmospheric air after indirect heat exchange are transported to the oven for serving as combustion air. The cooling of the torreficated lignocellulosic material takes place in a device of the type jacketed cooling screw with compression. A cooling medium is transported counter currently to the advancing and in an increasing degree compressed torreficated lignocellulosic material through an outer jacket and/or through an inner jacket in the centre of the cooling screw. The cooling medium leaves the cooling screw, and is fed to a heat exchanger. The energy absorbed from the cooling medium is indirectly transferred to the combustion air, which is led to the oven. The cooling medium at its output temperature is returned and introduced into the cooling screw at the end. The cooled torreficated lignocellulosic material is fed out, and is exposed to cooling with atmospheric air through indirect heat exchange and in that the heated atmospheric air is mixed into the combustion air that is supplied to the oven. The cooling medium is comprised of heat resistant oil. The steam at overpressure leaving the jacket of the torrefication chamber is divided into two flows, where one of which is led to the drying device while the other is led to heat exchangers. The energy is transferred indirectly to the circulating hot water such as district heating water, which steam flow during/after emitting energy condenses to condensate water. The steam boiler is localized along a steam turbine part of a power/heating plant. An INDEPENDENT CLAIM is included for an apparatus for the manufacture of torreficated lignocellulosic material.    DESCRIPTION OF DRAWING(S) - The diagram shows a flow chart of a method for manufacturing a torreficated lignocellulosic material.    Air displacing feeding device (2)    Gastight jacketed drying device (3)    Torrefication chamber (4)    Cooling device (7)    Heat exchanger. (9)