Page 59 - Plant design and economics for chemical engineers

42 PLANT DESIGN AND ECONOMICS FOR CHEMICAL ENGINEERS

SIEVE-TRAY COLUMN
Identification: Item Date
Item No.
No. required B Y

Function:
Operation:

Materirk handled: Feed Overhead RepU.X Bottoms
Quantity
Composition
Temperature

Design data: No. of trays Reflux ratio
Pressure Tray spacing
Functional height Skirt height
Material of construction
Diameter: Liquid density lb/h3 (-kg/m’)
Vapor density lb/R’ (-kg/m’)
Maximum allowable vapor velocity (superficial) ~ft/s (- m/s)
Maximum vapor flow rate ft’/s (- m’/s)
Recommended inside diameter
Hole size and arrangement
Tray thickness

Utilities:
Controls:
Imul8tion:
Tderances:
Comments and draw@:

FIGURE 2-7
Specification sheet for sieve-tray distillation column.

to extend the specifications to include additional details of the mechanical
design. Locations and sizes of outlets, supports, and other essential fabrication
information can be presented with the specifications in the form of comments or
drawings.

MATERIALS OF CONSTRUCTION

The effects of corrosion and erosion must be considered in the design of
chemical plants and equipment. Chemical resistance and physical properties of
constructional materials, therefore, are important factors in the choice and
design of equipment. The materials of construction may be resistant to the