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Pharmaceutical Manufacturing Handbook: Production and

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Drive nozzle<br />

face<br />

D<br />

FIGURE 4<br />

C<br />

E<br />

10˝<br />

B<br />

A<br />

18˝<br />

(4) 3/4˝ dia. holes<br />

equally spaced on<br />

a 10˝ BC<br />

F<br />

4 1/4˝<br />

12˝<br />

5˝<br />

13˝ 13 1/4˝<br />

(3˝ Nozs.) (4˝ Nozs.)<br />

1 1/2˝ agit.<br />

nozs.<br />

3˝<br />

(Offset)<br />

54˝ O.D.<br />

48˝ I.D.<br />

3˝ Legs (four)<br />

45˝ Leg circle<br />

6˝<br />

1/2˝ Cplg.<br />

3˝ Noz.<br />

SRW 3525 drive<br />

Lubricated dry<br />

mechanical seal<br />

1/2˝ Cplg. 14 1/4˝ (6˝ Noz.)<br />

2˝ Cplgs. (Two)<br />

Optional side<br />

supports<br />

Fin Battle w/RTD<br />

Temperature Sansor<br />

23˝ Span<br />

Cryo-Lock CBT<br />

1 1/2˝ Cplgs.<br />

Typical 300 - or 500 - gal jacketed vessel ( www.pfaudler.com ).<br />

<strong>and</strong> N is the agitator rotation rate. It should be noted that the fi lm heat transfer<br />

coeffi cient varies inversely with the viscosity, that is,<br />

h i<br />

1<br />

~ . μ<br />

Reactions where the viscosity increases substantially with conversion, such as some<br />

polymerization reactions, can be particularly diffi cult to control upon scale - up.<br />

Jacket - Side Coeffi cient Here the calculations are shown for a jacket equipped<br />

with agitation nozzles that greatly increase the jacket fl uid velocity. The jacket “ swirl<br />

velocity ” v j is calculated (iteratively) from the nonlinear algebraic relationship<br />

[17]<br />

̇m ( v v )<br />

n n j<br />

HEAT TRANSFER IN PROCESS VESSELS 149<br />

033<br />

i<br />

(29)<br />

2<br />

4fL<br />

vj<br />

⎞<br />

Af<br />

D ⎝<br />

⎜<br />

⎠<br />

⎟ ρ (30)<br />

2<br />

− =( ) ⎛<br />

e

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