Interlocks dryers

Rougher lactose particles with Ds = 2.064 (prepared by wet granulation) were found to have lower flowability and tapped density than the smooth ones with Ds = 2.036 (prepared by a fluidized bed dryer), indicating a higher void between the rougher particles with insignificant mechanical interlocking. 

Interlocks Interlocks are another important feature of a well-designed control and instrumentation system. Interlocks are intended to prevent damage to the dryer system or to personnel, especially during the critical periods of start-up and shutdown. The following are a few key interlocks to consider in a typical dryer system. 

Personnel injury This interlock is to prevent injury due to entering the dryer during operation, but more typically to prevent dryer start-up with personnel in the main chamber or inlet or exhaust air ductworK on large dryers. This typically involves microswitches on access doors coupled with proper door lock devices and tags. 

It is difficult to ensure even feeding of loose fibers to a dryer as combing and other prefeeding techniques are only partially effective in untangling fibers that have interlocked. The effect of such unevenness in mat thickness and/or openness has been investigated by Keey and Wu [78], who consider that an actual suction-drum dryer can conceptually be replaced by an equivalent unit consisting of a number of narrow dryers in... 

---