EcoWater CHC, Инструкция по установке и обслуживанию

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differential pressure between Inlet and Outlet increases causing the PLC to initiate a back wash of the
filter. When a back wash is initiated, water is driven into the rinse piston at the end of the filter. The
rinse piston opens the back wash drain valve, and as water passes out of the drain it crease a Venturi
effect that is used to suck off any debris from the filter’s screen. Once the back wash is complete, the
controller will cease all water flow to the rinse piston and the filter will return to a home position. At the
end of the filtration back wash cycle, the PLC verifies filter cleanliness, and if the filter did not clean it’s
screen appropriately, a second back wash may begin. The filter’s back wash cycle is also controlled by a
timer, the timer has been set to automatically clean the filter at least once every 6 hours of operation. All
operational failures are shown within the Control Station’s Filter Alert Area.
Tower Suction
Manifold
Combo Skid (1 pump)
Tower Sweeper
Nozzles
Drain
Tower CHC
Discharge
CHC Chamber
Assembly
Auto Filter
Assembly
Centrifugal
Separator
FP
Torroidal
Conductivity
Probe
1
2
3
4
5
Toroidal Conductivity-
EcoWater has chosen to utilize a Toroidal Conductivity Sensor. Conductivity is a measurement of the
dissolved solids within water. This sensor is utilized to help control the overall maximum conductivity of
the system water.
The advantage of this technology is measurement without any electrical contact between the electrode and
the process fluid. The probe uses two toroidal transformers which are inductively coupled side by side
and encased in a plastic sheath. The controller supplies a high frequency reference voltage to the first
toroid or drive coil which generates a strong magnetic field. As the liquid containing conductive ions
passes thru the hole of the sensor, it acts as a one turn secondary winding. The passage of this fluid then
induces a current proportional to the voltage induced by the magnetic field. The conductance of the one
turn winding is measured according to Ohm's law. The conductance is proportional to the specific
conductivity of the fluid and a constant factor determined by the geometry and installation of the
sensor. The second toroid or receiving coil also is affected by the passage of the fluid in a similar
fashion. The liquid passing thru the second toroid also acts as a liquid turn or primary winding in the
second toroidal transformer. The current generated by the fluid creates a magnetic field in the second
toroid. The induced current from the receiving coil is measured as an output to the instrument. The
controller converts the signal from the sensor to specific conductivity of the process liquid. Although the
toroidal probe is less subject to calibration errors or buildups on the sensor, it is still important that the