Two-stage ejector

Figures 6-5 and 6-6 illustrate two-stage ejector installations with barometric and surface t) pe inter-after condensers respectively. The discharge of the steam non-condensables from the second stage jet of Figure 6-5 is exhausted to the atmosphere, while in Figure 6-6 the steam is condensed in the aftercondenser and, essentially, only non-condensables leave the ent of the aftercondenser. Figure 6-7A indicates a diagram of a three-stage barometric type installation.

Figure 6-5. Two-stage ejector using barometric type intercondenser. By permission, Eiilott Co.

Figure 6-6. Two-stage ejector employing surface type inter-and-after-condenser. By permission, Eiiiott Co.

Figures 6-28 A, B, C, D and E give representative estimating data for two stage ejectors with barometric intercondenser.

Example 6-11 Size Selection and Utilities For Two-Stage Ejector With Barometric Intercondenser... 

Two-stage ejector with condenser A — First stage. B — Second stage. D — Water spray... 

Figure 7.30. Arrangements of two-stage ejectors with condensers, (a) Identification of the parts of a two-stage ejector (Croll-Reynolds Co.). (b) A two-stage ejector with interstage barometric condenser (Elliot Co.), (c) A two-stage ejector with surface condensers interstage and terminal (Elliot Co.).

Figure 23-6 Two stage ejector with jet interoondenser serving a low level jet condenser.

Examination of Figure 23-9 will show how the pressure of water vapor in the load to the second stage will reduced the maximum dry air capacity of the two-stage ejector. 

FIGURE 2.39 Two-Stage ejector with decentralized mounting for the subdivision of stroke movements... 

For these individual strokes, normalized two-stage ejectors (Figure 2.39) are used that can automatically divide the ejection movement of the machine into two individual strokes. 

On the vapor outlet of steam turbine surface condensers, there is a two-stage ejector system and a two-stage condenser. Referring to Fig. 25.5, this two-stage condenser is actually a small condenser divided into two portions on the shell side by a partition baffle. 

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