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2000 Hook-up Book - Spirax Sarco

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Figure II-82<br />

Recovery of Flash Steam and Pump Power Steam on Preheater (Steam in the Shell)<br />

To<br />

Vent<br />

Pilot<br />

Operated<br />

Back<br />

Pressure<br />

Valve<br />

Strainer<br />

Flash<br />

Recovery<br />

Vessel<br />

Safety<br />

Valve<br />

To<br />

Vent<br />

Drip<br />

Pan<br />

Elbow<br />

Pre-Heater<br />

Condensate from the main heat<br />

exchanger flows to a flash Steam<br />

Recovery Vessel. The flash steam is<br />

separated and led to the Preheater<br />

where it is condensed as it preheats<br />

the incoming cool water or other liquid.<br />

Any incondensibles are<br />

discharged to atmosphere through<br />

the thermostatic air vent.<br />

Air<br />

Vent<br />

Check<br />

Valve<br />

Pipe to<br />

Safe<br />

Place<br />

Sensor<br />

Pressure<br />

Powered<br />

Pump<br />

Heated<br />

Outlet<br />

Cool<br />

Return<br />

Strainer<br />

Thermo-Dynamic<br />

Steam Trap<br />

Motive Steam S<strong>up</strong>ply<br />

Check<br />

Valve<br />

Vacuum<br />

Breaker<br />

Temperature<br />

Control<br />

Valve<br />

Float &<br />

Thermostatic<br />

Steam Trap<br />

Strainer<br />

Residual condensate from the flash<br />

vessel, with that from the preheater,<br />

falls to the inlet of the Pressure<br />

Powered Pump. Pump exhaust steam<br />

is taken to the Flash Steam line and<br />

its heat content recovered in the preheater.<br />

Air<br />

Vent<br />

Heat Exchanger<br />

Check<br />

Valve<br />

Pipe to<br />

Safe<br />

Place<br />

Float &<br />

Thermostatic<br />

Steam Trap<br />

Moisture<br />

Separator Strainer<br />

To<br />

Condensate<br />

Return<br />

A Packaged Pump Unit with ASME<br />

coded receiver can be used in place<br />

of the component flash vessels and<br />

Pressure Powered Pump.<br />

Steam<br />

S<strong>up</strong>ply<br />

HOOK-UP DIAGRAMS<br />

125

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