METHOD FOR MONITORING AND CONTROL OF TORREFACTION TEMPERATURE

摘要

The invention relates to to a method and an arrangement for precise monitoring and control of torrefaction temperature, which enables accurate control of the quality and properties of the torrefied material. The method includes determining the surface temperature of the biomass in the torrefaction arrangement is using an IR-thermometer and hot nitrogen gas a purge gas.

主权项

1. A method for monitoring a process of torrefaction of a biomass, characterized in that the surface temperature of the biomass in the torrefaction arrangement is determined using an IR-thermometer and wherein a stream of inert non infrared active gas is supplied in the space between a lens of the IR-thermometer and the biomass and wherein the temperature of the inert non infrared active gas at a purge gas outlet is above 150° C., such as above 200° C., such as above 250° C. such as above 300° C., such as above 350° C., such as above 400° C., such as above 450° C.