4.2.5 Backflow preventer (optional)
The backflow preventer (63) consists of a non-return valve and a
water trap with level monitoring. Water flowing back from the point
of injection is collected in the water trap and detected by the elec‐
tronic level switch. This switches off the ozone system to avoid
serious damage to the system. Before recommissioning the ozone
system, the water trap needs to be drained and the system’s gas
system dried, if necessary.
4.2.6 Static helical mixer (optional or accessory)
The ozone gas mixture is fed to the process water flow via the non-
return valve (33) fitted directly at the inlet of the static helical mixer
(31). The non-return valve (33) prevents the backflow of the water
in the pipe between the ozone outlet of the OZONFILT
®
OZVb and
the inlet of the non-return valve (33).
The static helical mixer (31) accommodates individual mixing ele‐
ments for mixing the ozone into the process water. The mixing
equipment has to be appropriately configured to the process water
throughput for optimum incorporation of the ozone into the process
water. There cannot be optimum mixing if the throughput is too
low.
4.2.7 Cooling water system
The cooling water has the task of absorbing and dissipating the
heat produced during ozone generation in the chamber of the
ozone generator (2). This heat dissipation is important to keep the
ozoniferous gas at a low temperature to maintain the excellent
ozone output and protect the internal components of the ozone
generator.
The cooling water travels from the cooling water inlet to the angle
valve (24), at which the flow can be regulated. From there the
cooling water enters the ozone generator (2).
A flow sensor (9) downstream of the cooling water outlet of the
ozone generator switches off the system if the flow falls below the
requisite minimum coolant flow rate.
The cooling water temperature is also measured by a temperature
sensor (42) and the system is switched off with a corresponding
fault alert, should the maximum temperature be exceeded.
Detailed information on water quality, temperature and flow rates
can be found in the "Technical data” chapter.
4.2.8 Electrical system components
4.2.8.1 Control
The system is fully controlled and monitored by a control (70). The
control
n
controls the electronic power unit (20) for high voltage genera‐
tion,
n
measures and monitors the supply voltage to the system,
n
measures and monitors the primary voltage of the HV trans‐
former (21),
n
measures and monitors the primary current of the HV trans‐
former (21),
Components of the system and their function
20