Find a good method for heat exchange to cool hot gas from 800 degrees to 300 degrees
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I need an effective method for heat exchange to reduce the temperature of hot gas from 800 degrees to 300 degrees. If both substances are gases, what impact does the thickness of the layer involved in heat exchange have? Are there any relevant formulas for this?
In gas-liquid heat exchange, the temperature difference is quite large. What impact does the wall thickness of the tube have on heat transfer? Are there any theoretical formulas or empirical equations for this?
Yes, what form of heat exchange is used?
Shell-and-tube types will do, as well as some fire-tube boilers. The main things to pay attention to here are material selection, thermal stress on the tube sheet, and so on
Fire-tube boilers can be used, as well as heat-pipe exchangers for gas-to-gas heat exchange; heat-pipe evaporators can also be used for gas-to-vapor heat exchange.
This post was last edited by hotteen2008 on 2018-4-26 00:32. If it is a chlorine-containing gas, attention should be paid to the issue of dioxin reformation at low temperatures； For dust-containing gases, it is recommended to use a fire-tube boiler for ash removal, as mentioned above, as this is a simpler approach!!
Direct gas-to-gas heat exchange; choose good materials, and it’s difficult to make a choice without any pressure
Could you please explain in detail what requirements exist regarding material selection for this type of preheater?