The system described is a continuous spray drying plant, where a suspension is processed into a powder. The aqueous feed stream is atomized using a nozzle, and the droplets are dried into powder upon contact with the drying air. Here is the diagram:

The variables are: F=feed stream, Y_f watercontent in the feed, Y_p watercontent in the powder and T is temperature in C.

The system can be described via. these differential equations :

How can i prove, that the process can be illustrated as the following block diagram?:

Suspension ind F (kg trstof/min.) Yf (kg vand/kg trstof) Spraykammer Pulver ud Yp (kg vand/kg trstof) T (Celsius) dtdT(t)=0,2T(t)10Yf(t)50F(t)dtdYp(t)=0,2Yp(t)+0,012Yf(t)+0,08F(t)