Common intermediate storage

The third philosophy that makes use of intermediate storage is common intermediate storage (CIS) operational philosophy, shown in Fig. 1.6. CIS philosophy involves the sharing of storage by various tasks within the batch plant. Needless... 

Common Intermediate Storage (CIS) the material is stable and may be stored in one or more vessels that may be shared by other materials although not simultaneously. 

In the analysis, synthesis and optimization of batch plants complexity arises from the various operational philosophies that are inherent in time dependent processes. In a situation where the intermediate is allowed to wait in the same unit from which it is produced until the next unit is available, the operational philosophy is commonly known as no intermediate storage (NIS) operational philosophy. This philosophy is depicted in Fig. 1.3. NIS operational philosophy is usually adopted if operational space is of essence, since intermediate storage tanks can occupy considerable area. 

As shown in Figure 2, flue gas from the boiler at about 300°F passes through a 95 efficient ESP to remove most of the fly ash before the flue gas enters the FGD system. The collected fly ash is removed from the ESP hopper, transferred to intermediate storage silos, and trucked to an onsite ash landfill situated one mile from the power unit. The flue gas from the ESP passes through the boiler ID fan, a common plenum feeding the multiple trains of spray dryers, and the ductwork feeding the spray dryer. 

Alexandrite, the common name for Cr-doped chrysoberyl, is a laser material capable of continuously tunable laser output in the 700-800 nm region. It was established that alexandrite is an intermediate crystal field matrix, thus the non-phonon emitting state is coupled to the 72 relaxed state and behaves as a storage level for the latter. The laser-emitted light is strongly polarized due to its biaxial structure and is characterized by a decay time of 260 ps (Fabeni et al. 1991 Schepler 1984 Suchoki et al. 2002). Two pairs of sharp i -lines are detected connected with Cr " in two different structural positions the first near 680 nm with a decay time of approximately 330 ps is connected with mirror site fluorescence and the second at 690 nm with a much longer decay of approximately 44 ms is connected with inversion symmetry sites (Powell et al. 1985). The group of narrow lines between 640 and 660 nm was connected with an anti-Stokes vibronic sideband of the mirror site fluorescence. 

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