Reverse osmosis system
AVRO 125 TS/TL
Order no. 185 752 945-inter Edited by: nkes-mrie :\BA-752945-INTER_185_AVRO_125.DOCX
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2 | Functional description
Via the 5 µm drinking water filter (filter element), the water is directed
to the inlet of the feed water section. The water flows to the high-
pressure pump via the inlet solenoid valve with a downstream
pressure switch for minimum pressure. By means of an adjusting
valve, the pressure generated by the pump is reduced to the required
operating pressure and the water is directed to the membrane.
The membrane separates the water into the partial flows permeate
and concentrate. A partial flow of the concentrate is returned to the
feed water via an orifice regulating independently of pressure and
thus ensures a steady flow over the reverse osmosis membrane and
increases the economic efficiency of the reverse osmosis system.
At the same time, the concentrate volume flow is run via an AVRO
treatment module. where seed crystals are formed at a cathode due
to the application of direct current. These seed crystals are then
washed out with the residual concentrate and thus the reverse
osmosis membrane is protected from clogging. Whenever the system
is switched off (tank full) or in case of disturbances, the substances
retained on the membrane are flushed off by means of the inlet
solenoid valve and a solenoid valve switched in parallel to the control
valve for concentrate.
The hydraulic set-up of the system is designed in a way that the
concentrate volume and the permeate volume are registered by
means of flow sensors and are displayed in the control unit.
The system recovery can also be called up in the control unit.
1)
The permeate produced is fed into a light-tight reservoir. A level
control with three switching contacts is integrated in the tank. In order
to supply the consumers with permeate, a centrifugal pump made of
high-performance plastics including pressure switch and diaphragm
expansion tank is integrated in the system as pressure booster
system.
1)
Only AVRO 125 TS