Efficient design for agglomeration in spray dryer
Title:
Efficient Design and Control of Agglomeration in Spray Drying Machines - EDECAD -
Head:
Prof. Dr.-Ing. M. Sommerfeld
Realizer:
Keywords:
spray drying, agglomeration, sticky particles, collision model
Description:
In the frame of the Euler/Lagrange approach an existing stochastic inter-particle collision model will be extended to the interaction of droplets and particles relevant for spray drying processes. The following situations will be considered:
- collision between droplets with consideration of droplet coalescence,
- collision between droplets and solid particles by accounting for agglomeration,
- collision and agglomeration of dried (sticky) particles.
The resulting collision models will be implemented in a subroutine and provided to the partners of the project-consortia for implementation into existing CFD-codes. The droplet collision model will be based on the data obtained from UMIST, Manchester.
For the analysis of sticky particle collisions and collisions between particles and droplets detailed experiments will be performed at a laboratory-scale test facility. The interaction of particle-loaden jets will be studied by visualisation techniques and the particle streakline method. For this purpose a pulsed Na-Yag laser and high resolution CCD-camers combined with a macrolens will be used. The signal processing software will be further extended and refined to allow for a detailed analysis of the processes.
Milk powder agglomerate