How to remove moisture from the high-temperature gases in a drying furnace
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Dear experts, I have a question: The dried hot air coming out of the hot air furnace is blown into the rotary drying bed. The hot air exiting the drying bed after the drying of the material (which may be unsaturated with water vapor) is intended to be recycled back to the inlet of the hot air furnace. What is the best way to remove the moisture from this hot air at the exit of the drying process (at around 260°C)? :handshake
I’d like to improve myself; I hope friends in this forum can offer lots of advice :)
Pressure-driven dehumidification, heat air recycling； Alternatively, let this hot air preheat the cold air to make use of some of the heat.
Preheating cold air with hot air is an option; however, if pressure is applied, the additional investment in equipment might be greater than that required for adding a heat exchanger: lol
Do you have any idea how much energy can be recovered from preheating cold air? :handshake
About 40% can be recovered, and this needs to be determined using a heat exchanger. However, it is necessary to consider that the water in the hot air may already be saturated, resulting in a high dew point, and to take into account the possibility of corrosion. This hot air has a temperature of 260°C, and it can also be used to generate low-pressure steam at around 0.3 MPa.
The hot and humid air coming out of the drying oven is not at 260 degrees C; I’ll check that and come back to discuss it later. Thank you:handshake
Are there any latest developments in dehumidification and heat recovery?