DISPOSAL DEVICE FOR RADIOACTIVE GASEOUS WASTE

摘要

PURPOSE:To enable a complete defrosting without any operation of a freezer unit by attaching to a dryer a heater activating itself according to a temperature change of a refrigerant return piping of the freezer unit. CONSTITUTION:A heater 50 is attached under a dryer 8 and a thermometer 51 is attached to an outlet side return piping 21 of a refrigerant. In case of a heat load adjustment, a temperature of the outlet side return piping 21 of a refrigerant of the dryer 8 is measured and thereby a necessary amount of a heat load is supplied or a capacity of the heater 50 is controlled through an automatic temperature controller. In case of defrosting, ON-OFF signals of a board 52 are generated. In this case, an offgas of an ordinary flow rate, say, 40Nm3/h, enters from an lower nozzle 33 of the dryer 8 and is heat- exchanged and is led to downstream equipments from an outlet nozzle 34 via a cooling part 20. On that case, a water content of 0.2kg/h is removed and sticks to the cooling part 20 and a demister 43 part. At the whole device is operated during about 15 hours, water of around 3kg sticks in a form of frost.