O 3 Generator Operation; Principle Of Photolytic O; Generation; Figure 9-10. O 3 Generator Internal Pneumatics - Teledyne T750 User Manual

O G
9.7.
ENERATOR
3
P
RINCIPLE OF
Ozone is a naturally occurring substance made up of three atoms of oxygen (O
of its relatively short half-life, ozone cannot be bottled and stored for later use and therefore
must always be generated on-site by an ozone generator. The two main principles of ozone
generation are Ultraviolet (UV) light and corona discharge. While the corona-discharge
method is most common because of its ability to generate very high concentrations (up to
50%), the UV-light method is most feasible in calibration applications where low, accurate
concentrations of ozone are desired. The UV-light method mimics the radiation method
that occurs naturally from the sun in the upper atmosphere producing the ozone layer. A
UV lamp inside the generator emits a precise wavelength of UV light (185 nm). Ambient
air is passed over the UV lamp, which splits some of the molecular oxygen (O
into separate atoms which attach to other existing O
To GPT
Chamber
To O
3
Exhaust
170
O
PERATION
P O G
HOTOLYTIC
3
O Gen
3
6O + hv
2
Valve
O
3
Out
Flow
Control
Assembly
Figure 9-10. O Generator Internal Pneumatics
3
ENERATION
molecules, thus forming ozone (O
2
Inlet from
Diluent Source
Valve
O In
2
= 3O
3
185
). Because
3
) in the gas
2
).
3
083730750B DCN8606