Page 241 - Petroleum and Gas Field Processing

Figure 4 Oil droplets rise between two consecutive plates in the PPI.

Figure 5 The corrugated plate interceptor.

Both PPI and CPI are normally used for water treatment under
atmospheric conditions. The 45 inclination of the plates may present a

problem when produced water contains appreciable amounts of sediments
or sand, particularly oil-wet sand. The solids have the tendency to adhere
to the surface of the plates at such an angle of inclination, which may
cause clogging of the plates. To avoid such a problem and to enable
treatment at pressures higher than atmospheric, modified CPI equipment
known as cross-flow devices have been developed. In such equipment, the

angle of inclination of the plates is made steeper than 45 (normally 60 to

Copyright 2003 by Marcel Dekker, Inc. All Rights Reserved.