1. A method of sterilizing a powder or grain, including:! application of heat and pressure, at which the powder or grain is fed into the pipeline with a stream of heated gas and maintained under conditions of application of heat and pressure, and the transportation of powder or grain, at which the powder or grain comes into direct contact with the heated condensing gas in the pipeline with heated gas within 0.008-2 s and! instant sterilization by depressurization, at which the heated condensing gas and powder or grain are instantly released into the space with a pressure lower than in the heated gas pipeline, while the water contained in the microorganisms on the powder or grain boils quickly, and the tissues of the microorganisms are destroyed. ! 2. The method according to claim 1, in which, when performing instantaneous sterilization by depressurization, the heated condensing gas and powder or grain pass through a pressure reducing device located downstream of the heated gas pipeline to reduce the pressure that occurs over a period of 0, 00001 to 0.1 s ! 3. The method according to claim 1 or 2, in which when performing instantaneous sterilization by depressurization, the heated condensing gas and powder or grain are fed into the space with a pressure of 0.05-0.7 MPa lower than the pressure applied at the application stage heat and pressure. ! 4. The method according to claim 1, further comprising:! cooling the heated condensing gas and powder or grain with non-condensable gas supplied from the cooling unit； and! separation of chilled powder or grain from heated condensing gas and non-condensing gas. !5. The method according to claim 4, in which! at1. Способ стерилизации порошка или зерна, включающий: ! приложение тепла и давления, при котором порошок или зерно подают в трубопровод с потоком нагретого газа и выдерживают в условиях приложения тепла и давления, и транспортирование порошка или зерна, при котором порошок или зерно вступает в непосредственный контакт с
