Process Equipment Update
of fractions, depending on the type of oil in question. The first by-products of thermal cracking are light ends (also called light distillates or low boilers). These fractions have a low boiling point and are highly volatile. The production of light ends is
inevitable, because it’s the chemical consequence of heating up thermal fluid. The quantity of light ends in the system has to be constantly monitored, because their presence lowers flashpoints and can create dangerous situations in the event of a loss of containment. DSEAR/ ATEX 137 law requires flash points to be managed by taking regular and representative samples, and submitting them for expert advice. This goes hand in hand with surveys that demonstrate a safe system and knowledgeable staff or operators. The flash point is the minimum temperature at which the vapour released from a liquid will ignite in the presence of an external ignition source and oxygen. Flash points vary depending on the type of thermal liquid used. Because of their volatility, light ends
have to be managed and removed, despite the fact that this causes thermal oil levels to shrink. There are several ways of managing and removing
Frankfurt am Main · 15 – 19 June 2015
“Thermal cracking is the process that takes place when heat is applied under pressure to the thermal liquid. It results in the breaking of the fluid’s molecules into smaller molecules.”
Andy Burns, Global Heat Transfer
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