Product Drying System Upgrade

In some specialty glass manufacturing plants, molten glass is cooled by quenching in a water bath. In such applications, water must then be removed, which is normally done by several annealing ovens. Better drying devices using a combination of gravity, filtration and forced air evaporation can reduce the drying time, decrease fuel use and increase production capacity .

A US based plant is reported to have reduced the drying times from 56 to 72 hours down to 11 hours by re-designing the water quenching baths. While also providing significant energy savings, this transformation helped reduce operation and maintenance costs (Worrell et al., 2008. p.72-73).

Development Status Products
Commercial

Product Drying System UpgradeCosts & Benefits

Parent Process: Finishing
Energy Savings Potential

In a US based plant, by reduced the drying time from 58 to 72 hours to only 11 hours per batch energy savings were 179,200 kWh/year obtained (Worrell et al., 2008. p.73)..

CO2 Emission Reduction Potential
Costs

Non-energy benefits, including reduced operation and maintenance costs of reduced drying times in the US based plant were $14,637 per year. Costs for the project were $43,630. With energy costs of 5 cents/kWh, this would yield a payback of less than 2 years (Worrell et al., 2008. p.73).

Product Drying System Upgrade Publications

Page Number: 

72-73