Multistage system

Single-stage evaporators tend only to be used when the capacity needed is small. It is more usual to employ multistage systems which recover and reuse the latent heat of the vaporized material. Three... 

Multistage Systems The majority of steam-jet systems being currently instaUed are multistage. Up to five stage systems are in commercial operation. 

In Example 11.1, the water recovery (permeate flowrate/feed flowrate) was 0.41. It is desired to increase water recovery by designing a multistage system. Two additional RO stages are to be used to process the reject from the first stage. Figure 11.7 illustrates... 

Monticello, D. J., Multistage System for Deep Desulfurization of Fossil Fuels Patent No. WO9216602. 1992, Oct. 01. 

Also for these pumps, multistage systems (e.g. Varian TriScroll Pump) are used which allows for final pressure around 10 2torr and pumping speed of about 30m3/h (see Fig. 1.10). The typical application of scroll pumps systems is the backing for turbomolec-ular pumps (see Section 1.6.6). 

One drawback of the Pb-Pb system is that two-stage or three-stage evolution of the U-Pb isotopic system can produce linear arrays on a Pb-Pb isochron plot (Gale and Mussett, 1973). If these arrays are interpreted as single-stage isochrons, incorrect dates may be obtained. In some cases, measurements of the U/Pb ratio can help identify multistage samples. But if several events occurred sufficiently early in solar system history, even a concordia approach may not be able to identify a multistage system (Tera and Carlson,... 

Georgian gas mains are complex hydro-mechanical systems and their operation reliability depends on many factors. Complexity of gas mains caused by profile and long distances of transportation requires the creation of multistage systems with consecutive connections of compressor stations in pipeline segments, several take off points for various consumers and other armature for control and regulation of gas flow. 

Many chemical and biological systems include multistage processes rather than only continuous contact ones. The most common multistage systems are absorption and distillation columns. Most of these systems involve more than one phase and they therefore fall under the category of heterogeneous multistage systems. Multistage systems can be cocurrent or countercurrent. 

Gas solid catalytic systems are two-phase systems involving a solid catalyst with reactants and products that occur in the gas phase. Most gas-solid catalytic systems are continuous rather than multistage systems. 

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