I am debottlenecking a continuous dryer which fouls at high production rates. What impact would adding a diamond like coating or nitriding or polishing the 316 stainless steel have on the heat and hydrodynamic transport?
Adhesion (cohesion) of the sodium organic salt to a mill finished stainless steel is very high at the operating temperature 300 F. It is highly agglomerating and forms crust if not mechanically disturbed.
The dryer is built as a heated horizontal cylinder, containing a center shaft with a spiral of short blades that intermesh with stationary hooks, to clean the heated blades (~ 3 mm clearence).
If I only modify the cylinder interior, I imagine sliding but the hooks would result in surface renewal. Is there a negative to not coating the hooks, shaft and blade? Lack of convective turnover? increased stress on the hooks?
If I modify all surfaces, can I be too slick?
Adhesion (cohesion) of the sodium organic salt to a mill finished stainless steel is very high at the operating temperature 300 F. It is highly agglomerating and forms crust if not mechanically disturbed.
The dryer is built as a heated horizontal cylinder, containing a center shaft with a spiral of short blades that intermesh with stationary hooks, to clean the heated blades (~ 3 mm clearence).
If I only modify the cylinder interior, I imagine sliding but the hooks would result in surface renewal. Is there a negative to not coating the hooks, shaft and blade? Lack of convective turnover? increased stress on the hooks?
If I modify all surfaces, can I be too slick?
