Page 109 - Chemical Process Equipment - Selection and Design

5.3. MECHANICAL CONVEYORS AND ELEVATORS 81
TABLE 5.5. Belt Conveyor Dataa
(a) Capacity (tons/hr) at 100 ft/min, 100 Ib/cuR,
and indicated Slope Angle
45" Troughed Belt

Flat Belt

a Example 5.4 utilizes these data. Power = Phorironta, Pven,ca, +
~
~~
+
P,,, (HP), where Phorironte, (0.4+ ~/3OO)(W/1OOL PVemica,
=
=
O.OOl%, and P,,, obtained from part IC), with H=lift (ft),
L= horizontal travel &, and W= tons/hr.
(a) From Conveyor Equipment Manufacturers Association, 1979; (b)
from Stephens-Adamson Catalog 66, 1954; IC) from Hudson, 19541.
(b) Maximum Recommended Belt Speeds for Mondusting
Service
Belt Speed in Feet per Minute
nelt
12 250 300
18 300 350
350
400
24
Eel -~-
Figure 5.8. Flnght conveyors in which the material is scraped along, 30 400 450
36
500
450
and apron conveyors in which the material is carried along in a 42 500 550
closed path of interconnected pans. (a) Flight conveyor, in which
the material is scraped along a trough with flights attached to a
continuous chain. (b) Scraper-type of flight. (c) Roller flights. (d)
Apron conveyor, in which the material is carried along in moving,
overlapping pans. (e) Shallow and deep types of overlapping pans.