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2000 Hook-up Book - Spirax Sarco

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Figure II-84<br />

Flash Steam Condensing by Spray<br />

H.P. Condensate<br />

Boiler<br />

Make<strong>up</strong><br />

Tank<br />

Vent<br />

Residual flash steam for which no<br />

use can found often causes a nuisance<br />

if vented to atmosphere, and of<br />

course carries its valuable heat content<br />

with it. This steam may be<br />

condensed by spraying in cold water,<br />

in a light gauge but corrosion resistant<br />

chamber fitted to the receiver<br />

Flash<br />

Condenser<br />

Condensate Receiver<br />

Centrifugal<br />

Pump<br />

Temperature<br />

Control Sensor<br />

Self Acting<br />

Temperature<br />

Control<br />

Strainer<br />

tank vent. If boiler feed quality water<br />

is used, the warmed water and condensed<br />

flash steam is added to the<br />

condensate in the receiver and<br />

reused. Condensing water which is<br />

not of feed water quality is kept separate<br />

from the condensate in the<br />

receiver as shown dotted.<br />

Overflow<br />

Cooling<br />

Water<br />

(Alternate)<br />

Waste<br />

A self-acting, normally closed temperature<br />

control with sensor in the<br />

vent line can control the coolant flow.<br />

This minimizes water usage, and<br />

where condensed flash steam is<br />

returned, avoids overcooling of the<br />

water in the receiver.<br />

HOOK-UP DIAGRAMS<br />

127

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