5
Operation of the OZONFILT
®
OZVb
The operation of the system can be understood with the aid of the
general layout drawings in
system and their function’ on page 13 and the following description
with block diagrams.
5.1 Electric power
The control (70) controls the power unit (20). The power unit feeds
signals to the HV transformer (21). The HV transformer (21) sup‐
plies high voltage for silent electrical discharge in the ozone gener‐
ator.
The other roles of the electronic control are as follows:
n
control of the solenoid valves
n
monitoring of the system
n
control of alarm equipment
The electronic control has appropriate connections to fulfil these
tasks.
5.2 Process gas flow
The pressure regulating valve (27) at the gas inlet of the system is
supplied with compressed gas containing oxygen. The system pri‐
ming pressure can be adjusted at the pressure regulating valve
(27) and read off from the pressure gauge. The pressure is moni‐
tored by the pressure sensor (43). The compressed gas then
passes the solenoid valve (23) and is conveyed to one of the
drying chambers (26). Residual moisture is drawn out of the gas in
the drying chamber. A partial flow of the dried gas is depressurised
to atmospheric pressure through the throttle valve (37) via the
other storage tank. This regenerates the drying agent in this
storage tank. Once the drying time has finished, the roles of the
storage tanks are swapped by the corresponding control of the sol‐
enoid valve block. The dry gas passes the non-return valves (38).
The pressure of the gas is measured by the pressure sensor (43)
and the value is displayed on the touch panel. The gas then
passes the throttle valve (4) and is conveyed to the gas flow meter
(11). The pressure sensor (6) measures the operating pressure of
the ozone generator, while the safety valve (8) limits it. The value
of the gas flow and the pressure is displayed on the touch panel.
The gas finally arrives in the ozone generator (2), in which ozone is
generated from a proportion of the oxygen by silent electrical dis‐
charge. The ozoniferous gas finally passes through the diaphragm
valve (5), through another non-return valve (33) to the static helical
mixer (31). There the ozoniferous gas is mixed with raw water. If
the system is idle and a fault or malfunction occurs, all the solenoid
valves at the system inlet and outlet are closed.
Functions within the system
OZONFILT OZVb 1-4 A
Operation of the OZONFILT
®
OZVb
24