METHOD OF SENSING ABNORMAL CONDITION IN HEAT EXCHANGE PROCESS AND HEAT EXCHANGE APPARATUS

摘要

Provided is a method for detecting an abnormality that has occurred in a process of heat exchange between a heat carrier and a process fluid, by which it is possible to rapidly and easily detect a leak of the heat carrier into the process-fluid channel in the heat-exchange process. The method, which is for detecting an abnormality that has occurred in a process of heat exchange between a heat carrier and a process fluid, comprises a detection step in which a gas evolved by decomposition of the heat carrier and/or a gas evolved by contact between the heat carrier and the process fluid is detected in a gas-phase part within the channel for the process fluid. It is preferred to apply the method to the heat-exchange process in which the heat carrier is a molten salt comprising a nitric acid salt and/or a nitrous acid salt and the process fluid comprises a secondary alcohol or a product of dehydration thereof.