NOVELTY - The method comprises converting a biomass with water and catalyst into substances such as carbon, oil and/or like substances of related type in a pressure vessel (2) by temperature and/or pressure elevation, and disorganizing the biomass by ultrasound or microwave irradiation before and/or during the conversion. The biomass is conveyed against ultrasound ends arranged in a pipeline by using a pump (11) such as screw pump or piston membrane pump. The conveying speed and/or conveying capacity of the pump, capacity of the ultrasound ends and/or conveying pressure are controllable by a regulator.    USE - Method for hydrothermal carbonization of biomass to produce pure carbon, which is useful as a basic product for chemical industry, as fertilizer or as substance directly applicable or useable for combustion processes, where the biomass comprises all living, dead and/or decomposed organisms, plants such as waste wood and/or residual wood, straw, grass, dung, leaves, sewage sludge and/or organic domestic refuse.    ADVANTAGE - The method ensures rapid, economical, automatic, efficient and continuous hydrothermal carbonization of the biomass with different compositions, qualities and sizes and less technical effort.    DETAILED DESCRIPTION - The method comprises converting a biomass with water and catalyst into substances such as carbon, oil and/or like substances of related type in a pressure vessel (2) by temperature and/or pressure elevation, and disorganizing the biomass by ultrasound or microwave irradiation before and/or during the conversion. The biomass is conveyed against ultrasound ends arranged in a pipeline by using a pump (11) such as a screw pump or a piston membrane pump. The conveying speed and/or conveying capacity of the pump, the capacity of the ultrasound ends and/or the conveying pressure are controllable by a regulator. The biomass is supplied by a microwave discharge reactor having a reaction chamber and is heated at 150-250 degrees C for 3-20 minutes. A pressure in the reaction chamber of the microwave discharge reactor is 15-30 bars. The disorganization is carried by decompression. The pressurized biomass relaxes in a container with low atmospheric pressure. The pressure vessel is formed as pipeline with a controllable inlet opening and a controllable outlet opening. The biomass, water and/or the catalyst are supplied over the controllable inlet opening. The temperature ratio and/or the pressure ratio are controlled, so that a filling product (1) from biomass, water and/or the catalyst supplied to the pressure vessel is transported through the pipeline in a defined manner. The biomass, water and/or the catalyst reacts with one another. A reaction product (10) of the filling product is obtained over the controllable outlet opening. A continuous supply of the biomass, water and/or the catalyst is carried out over a lock chamber having a controllable inlet opening and a controllable outlet opening, a piston press device, and an eccentric screw pump with pressure regulation. The lock chamber, piston press device and the eccentric screw pump are arranged above the controllable inlet opening of the pressure vessel. The lock chamber is connectable from the controllable inlet opening with a supply reservoir of biomass, water and/or the catalyst and from the controllable outlet opening with the controllable inlet opening of the pressure vessel. The piston press device has a chamber with an inlet opening, a controllable outlet opening and a piston movable in the chamber for pressing the product present in the chamber. The transportation of biomass, water and/or the catalyst from the lock chamber into the pressure vessel is carried out by pressurization using the piston. The transportation of the filling product present in the pressure vessel is supported by a conveyor arranged in the pipeline of the pressure vessel in the form of a controllable conveying screw. The conveying volumes of the conveyor are controlled by the regulator. The conveying screw extends itself over the total length of the pipeline of the pressure vessel and is concisely adjusted to the interior cross section of the pipeline of the pressure vessel. The temperature ratio and/or the pressure ratio in the pressure vessel are controlled over the inlet opening and the outlet opening by the regulator. The pressure vessel is heated and is partially arranged in a container fillable with a heat transmitting medium such as oil. The heating of the pressure vessel is controlled over the temperature of the heat transmitting medium in the container. Corn starch such as grain starch and/or potato starch is used as filling products. The withdrawal of the reaction product of the filling product is carried out by a filter arranged above the outlet opening of the pressure vessel. The reaction product is pressed before and/or after the withdrawal. The supply of biomass, water and/or catalyst, the temperature and/or pressure ratios in the pressure vessel, the transportation of the filling products through the pressure vessel and/or the withdrawal of the reaction product of the filling products from the pressure vessel are carried out by the regulator. The temperature in the pressure vessel is constantly kept at 18000-2000 degrees C over the time period of the transportation of the filling products through the pressure vessel. An INDEPENDENT CLAIM is included for a device for hydrothermal carbonization of biomass.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a device for hydrothermal carbonization of biomass in a discontinuous operation.    Filling product (1)    Pressure vessel (2)    Inlet valve (3)    Reaction product (10)    Pump. (11)