Page 47 - Chemical Process Equipment - Selection and Design

22 FLOWSHEETS

TABLE Z.Z-(continued)
Mass Transfer Vessels

MASS TRANSFER VESSELS

Drum or tank
0

Drum or tank

Tray Packed Storage tank
column column

Open tank

Gas holder

Jacketed vessel with
Multistage spray agitator
stirred column column Extract
&.j-u?J (r.l
- transfer coil
Process

Vessel with heat

Raffinate I 0
Bin for solids
Mixer-settler extraction battery

letter-number designation consists of a letter or combination to enthalpy, heat transfer rate, and also stream numbers are identified
designate the class of the equipment and a number to distinguish it with symbols called flags, of which Table 2.3 is a commonly used
from others of the same class, as two heat exchangers by E-112 and set. Particular units are identified on each flowsheet, as in Figure
E-215. Table 2.4 is a typical set of letter designations. 2.3.
Operating conditions such as flow rate, temperature, pressure, Letter designations and symbols for instrumentation have been