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Special safeties are used when distilling solvents containing
nitro-cellulose (nitrocellulose). Many waste solvents from the furniture industry
contain nitro-cellulose.
AFN1 = This device is composed of a temperature detector inside the
boiler which opens a water jet if the temperature reaches the previously
set value. Normally the working thermostat is set at 100°C. Inside the
electrical box there is another thermostat, normally set at 115°C, with
the sensor placed in the inner neck of the boiler. If this temperature is
reached, the solenoid valve opens the water shower for a previously set
time.
AFN2 = Extinguishing group with photocell which notices the formation
of smoke inside the boiler and the condensation unit, opening immediately
a water jet inside the boiler, for a previously set time.
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