Issue of water flow time in the inner coil during isothermal transformation
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What is the medium flowing through the inner coil in an isothermal transformation furnace when the catalyst is heated?
Well, it depends on what you use to raise the temperature – it can be steam or nitrogen
In an isothermal transformation furnace, no medium flows inside the heat exchange tubes when the catalyst is heated
When heating the catalyst for sulfidation, it is strictly prohibited to have water inside the tubes. During startup and heating, steam is generally introduced into the steam drum; subsequently, the water circuit is used for heating, while the process gas circuit works in conjunction with an electric furnace to raise the temperature. However, manufacturers of isothermal furnaces specify an upper limit on the rate of temperature increase per unit of time