TM 10--3510--221--10
0004 00--3/4 blank
WATER RECYCLE SYSTEM THEORY
OF OPERATION -- Continued
0004 00
RINSE 2
TANK
160 GAL
DISTILLATE
PUMP
EVAPORATIVE
COOLER
CONDENSATE
FROM STILL
CONDENSER
SUBCOOLER
TE
202
LT
201
FV
200
M201
OVERFLOW
TEMPERATURE
SENSOR
LEVEL
SENSOR
STANDPIPE
COALESCER
SOLENOID
VALVE
1 OF 4
FV
202
HAND
VALVE
1 OF 8
DRAIN
HAND
VALVE
DRAIN
WASTE
DRAIN
FV
203
FV
201
HAND
VALVE
HAND
VALVE
COALESCER OPERATION
During the distilling processes some organic vapors such as light fractions of fuel or oil may codistill with the steam
exiting the top of the still. The coalescer contains a disposable element that separates the lighter organic
contamination from the heavier water. While the water recycle system is operating the coalescer drains the separated
fluid into a external waste container.
EVAPORATIVE COOLING
The evaporative cooler is used when low temperature rinse water is required during high ambient temperature
conditions. Under this condition the signal from temperature sensor (TE202), located at the rinse 2 tank, will prompt
the control system to close solenoid valve (FV202) and open solenoid valve (FV203). When these valves reposition,
water coming out of the coalescer enters the evaporative cooler. In the evaporative cooler the water is formed into
droplets. The water droplets flow through demister mesh which has ambient air passing though it. As the water flows
to the bottom of the mesh it is returned to the rinse 2 tank. When the temperature of the water returning to the rinse 2
tank is acceptable, solenoid valve (FV202) opens, and solenoid valve (FV203) closes, allowing water coming out of
the coalescer to bypass the evaporative cooler and flow directly into the rinse 2 tank.
