Why do some manufacturers refer to “cold exchange” as “external heat exchange”?”
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This post was last edited by in the blink of an eye on 2017-10-21 at 21:13. In recent years, in the blink of an eye has visited many factories, some of which still refer to the conversion process involving cold-heat exchangers as “external heat exchange”. Recently, I casually read the book on sulfuric acid, which allowed me to review old knowledge and gain new insights; gradually, I understood the origin of the term \"external heat interaction\". In the history of the sulfuric acid industry, there was a period during which internal heat exchangers were used in the converters; generally, the heat-to-heat heat exchanger was placed inside the converter while the cold-to-heat heat exchanger was located outside, which led to the terms “internal heat exchange” and “external heat exchange”.
This post was last edited by zdl1966 on 2017-10-21 at 21:28. Different industries have their own terms, some of which have been passed down from the past. Just like we have two processes: transesterification and direct esterification. However, in the direct esterification process, employees still * habit to call it transesterification.
It’s better to standardize it; otherwise, it will cause confusion
So this name actually has a rather interesting origin
When the unit is small, there are internal heat exchangers between stage 1 and stage 2, as well as between stage 2 and stage 3; these are generally referred to as heat exchanger 1 and heat exchanger 2, and are commonly known as internal heat exchangers. The heat exchangers for stage 3 and stage 4 are external, and are commonly known as external heat exchangers. Now that the units are larger, internal heat exchangers have been basically eliminated and replaced with external ones, so they have all become external heat exchangers.