Page 268 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

238 Applied Process Design for Chemical and Petrochemical Plants

Equivalent standard
Tyler screen mesh
Theoretical screen mesh I() o o I() o o N N v w N en r-- 10 I() I()
-�_.;..._.;..._:..c.._""'-----"--- C\I I() r,.. - CX> ID V I"> C\I - - I"'> '
0 0 0 r()N-- N
0 0 0 000 � 1ol()a,l() Ovo1 wvl
�
�
�
Q 0. � I() I()
0 N. C\I O r-- 0 0 ID v I"> C\l'T T I
C\IN--
7 '? C\I - I.D � I
.... j
102 --
- . ., ...-
/�
/ ; v. v.,.
/
/,, ,, �.,
/_.��
10
, ,
,,
I ,1
i, // / J � ....
I,
V/' J / I,., � '!
v
I � "'/JV i,/ . .. "
I,,
j ...... I; 1
, .,
I , � I I
/ v
J I I I/ ; " / J
I /J IJ ' / / / / 1,i'
II VJ I ��1VJ l/ 11�11 "/ I/"
o"'- o'
o· 1111 II th Q 1-n II J �
I
- --/, �� �� �� (()
-1
" LI\
I I
cfo
-e
-
.._ Al I/ J
vs
���
01,
··,:
O',:
t::J:.
Q �
0
:=:::- ·S' � rv � o, ::J ,.,,. l'\t !() ....._ •
°' I
..___ -� � ..... rv
t o,
,.._� q, '" I
� q7 "!)j "> (,j II I II J J II
�II cl'/ J I
1:1
I ,VJ LI I' I/ I
//, I /J �
3 'i 1 I/
I '
I
I I I I I
JJ IJ I Notes
I i I J I J I. Numbers on curves represe nt
If J J J II I ! II true ( not bulk or apporent )
Ill, LI// j specific gravity of particles
4// i I' referred to water at 4 ° C.
2. Stokes-Cunningham corr-
I
I J I J I ection factor is included for
I I fine porticles settling in air.
l J J J y � I/ I
'/1 3. Physical properties used
5 }1 Temp. Viscosity Density
u / Fluid � centipoise lb./cu. ft.
I I II Air 70 0.0181 0.0749
II I Water
I J 70 0.981 62.3
VIV l l I I I II 11 I I I I II Ill I l 11 1111
6V1 J,/ I Ill I 1111 I 111 Ill
10 100 1000 10,000
Particle diameter, 1.1-,n
Figure 4-9. Terminal velocities of spherical particles of different densities settling in air and water at 70°F under the action of gravity. To con-
vert feet per second to meters per second, multiply by 0.3048. (From Lapple, et. al., Fluid and Particle Mechanics, University of Delaware,
1951, p. 292. By permission, Perry, J. H. Chemical Engineers Handbook, 6th Ed., McGraw-Hill Book Co., Inc. 1984, p. 5-67.