A method of pest controlling tobaccos and a system for carrying out said method.

摘要

In order to pest control tobacco there is provided in a gas tight tobacco storage room an inert O2 lacking atmosphere with O<Sub>2</Sub> between 0 and 5%, CO<Sub>2</Sub> between 1 and 20% and the balance N<Sub>2</Sub>. This atmosphere is maintained until mortality of the pest. The system for providing this atmosphere includes essentially a generator, which can be a combustion chamber (1) associated to a catalytic chamber (2) (in the case of an open circuit system in which air is drawn from the atmosphere) or a catalytic chamber alone (in the case of a closed circuit system in which air is drawn from the tobacco storage room itself) and a cooling tower (3).

The system is generally provided also with an evaporator (5) and a condenser (6) to control the humidity of the inert atmosphere, and a heat exchanger (7) in which the combustion heat is utilized to heat the inert atmosphere at a temperature which speeds up the mortality of the pest.