Jacket-and-coil

The correlations of Cummings and West [5, 29] for turbine mixers in vessels with Jackets and coils are ... 

Figure 10-94. Heat transfer coefficients for jackets and coils with fluid agitation. (Used by permission Engineering Manual Dowtherm " Heat Transfer Fluids, 1971. The Dow Chemical Co.)...

Figure 9.61. Reaction vessel with jacket and coil...

Cummings, G.H. and West, A.S. Ind. Eng. Chem. 42 (1950) 2303. Heat transfer data for kettles with jackets and coils. 

Heat transfer is usually effected by coils or jackets, but can also be achieved by the use of external loop heat exchangers and, in certain cases, by the vaporisation of volatile material from the reactor. The treatment, here mainly concerns Jackets and coils. Other instances of heat transfer are illustrated in the simulation examples of Chapter 5. 

As the feed material gets passed the temperature gradient, polymerisation occurs and the fully, polymerised material emerges from the base of the tower. The reaction process gets controlled by a complex array of heating and cooling jackets and coils. 

PE of 97-8% purity was fed continuously to the first nitrator from a hopper by means of a screw conveyer and, simultaneously, nitric acid, 98% strong, was introduced in quantity of 5-6 parts per part of PE, from a constant head tank thru a rotameter. The first nitrator was a cylindrical vessel provided with a stirrer, a jacket and coils carrying AN brine at -5° to - 11°. The temp in the nitrator was +15°... 

Figure 3.25 Comparison jacket and coil cooling 350 K +20% feed.

Clearly, a coil alone is also insufficient. Now, if we add the jacket and coil heat transfer rates,... 

In forced convection, the fluid is moved over the surface by a pump or blower neglecting natural convection are usually neglected. The study of forced convection is of great practical importance and vast amount of data have been amassed for streamline and turbulent flow in pipes, across and parallel to tubes, across plane surfaces, and in other important configurations such as jackets and coils. 

Jacket and Coil Type.—Figure 5 shows the construction of the first multiple-effect evaporator invented and patented by Pecqueur, and the heating surface consists simply of dished copper bottoms. The whole arrangement of the multiple effect is very simple, but naturally the capacity is small as such a construction is always limited in size. Figure 6 shows Howard s vacuum pan with jacket for the concentration of sugar juice. A similar pan was used by Roth for the same purpose. 

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