Case study analysis of flue gas-air heat exchangers: recovering waste heat from exhaust gases to generate hot air for drying
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Example of heat reuse from curing furnace exhaust gases for drying: Foshan Sanshui Zhongxing Long. This factory uses the heat generated by its ceiling-based drying lines for heating; previously, electric heating was used, and two such lines consumed over 20,000 kWh of electricity per month. For ceiling drying lines, the process temperature requirement is 90–100°C. Additionally, the exhaust gas from the curing oven next to the production line is at 110°C and holds significant value for recycling; yet it is discharged directly, resulting in a waste of thermal energy and environmental pollution.
【HuanNeng Technology】After conducting data analysis, the engineers recommend using a \"flue gas-air heat exchanger\" to capture the waste heat from exhaust gases and generate hot air for drying, as an alternative to electric heating.
Renovation of 2 drying lines, saving approximately 180,000 yuan per year； By upgrading the 4 lines as planned, more than 1 million yuan can be saved each year.
Isn’t it just a heat pipe heat exchanger? It sounds so sophisticated