Advanced High-Efficiency and Low-Emission Gas-Fired Drum-Drying Technology
Drying is one of the most energy intensive industrial processes. Papermaking, drying of food, textile and pharmaceutical products require a significant amount of energy to evaporate the excess water from the product slurry. The most popular drying method is drum drying which traditionally uses condensing steam for drum surface heating. The use of steam requires the drums to meet the ASME codes for pressure vessels, which limits the steam pressure and consequently the shell temperature, reducing the drying capacity. In most cases drying is also the temperature-critical aspect of product processsing. Gas Technology Institute (GTI) together with its industrial partners has developed an advanced high efficiency gas-fired drum dryer concept based on a combination of a low-NOx ribbon flame and an advanced heat transfer enhancement technique (US Patent 6,877,979). The new approach allows a significant increase in the surface temperature of the drum dryer, thereby increasing the drying rate. The pilot-scale unit was designed, fabricated, and successfully tested for the papermaking application.
KeywordsCombustion Vortex Steam Aqua Cond
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