START-UP METHOD OF DIRECT HEATING SYSTEM (VERSIONS), START-UP METHOD OF DIRECT HEATING DEVICE (VERSIONS) Russian patent published in 2010 - IPC F23C99/00 F23D14/12 F23D14/62 

FIELD: heating.

SUBSTANCE: start-up method of direct heating system includes fuel introduction zone, combustion zone and process zone which exchanges heat with the above combustion zone, at which there passed is hot fluid medium of oxidiser through the above combustion zone for the period of heating, which is enough to increase temperature of the above direct heating system to required temperature, steam passes through the above process zone during the second time period which is enough to control the temperature of the above direct heating system to the second required temperature, and fuel fluid medium containing fuel passes through the above fuel introduction zone after the above required temperature and the above second required temperature is reached.

EFFECT: invention allows bringing into the operation the direct heating device after some outage time or from cold start-up.

18 cl, 4 dwg