Ultraviolet germicidal lamp
in practice is attributed to a low pressure mercury lamp.
The low pressure mercury lamp is to use the low pressure mercury vapor (
Be intensified and emit ultraviolet light, its hair spectral line mainly have two: one is 253.
7 nm wavelength;
Another is 185 nm wavelength, and the two are invisible to the naked eye of ultraviolet light.
Effect, resonance effect, and their common optical properties.
Can meet the UVC strength for the disinfection of engineering output only artificial mercury (
The light source.
Ultraviolet germicidal lamp tube is made of quartz glass tubes after mercury lamp according to light up the mercury vapor pressure difference and ultraviolet light output intensity is different, divided into three types: low pressure mercury lamp, medium voltage, low strength high strength mercury lamp and low pressure mercury lamp.
The sterilization effect is decided by microbial shine on the dose.
Together, also by uv output energy, and the type of lamp, light intensity and the use of time, follow light aging, it will lose 30%
The strength of 50%.
Ultraviolet light dose refers to achieve must be inactivated bacteria rate, demand for a particular wavelength uv: shine dose (
= shining moment (
X (UVC strength
Upon the dose, the greater the disinfecting power is higher, due to the equipment size requirements, generally shining moment there are only a few seconds, therefore, tubes of UVC output intensity is measured ultraviolet disinfection equipment function of the main parameters.
Shine in urban wastewater disinfection, general average dose in more than 300 J/m2.
Lower than this value, may appear light resurrection phenomenon, namely bacteria cannot be completely kill, comes out of the way when under visible light shines, resurrected, and reduces the sterilization effect.
Sterilizing the higher power requirements, the greater the dose required.
The microbial bearing meet the main factors of ultraviolet light shines dose is light transmittance (
When the UVC output intensity and shining moment will be punctual, light transmittance change will form microbial practice under dose of change.
Above is the bright moon to talk about uv germicidal lamp
is actually belongs to a kind of low pressure mercury lamp, everybody can understand and see, need consultation can contact our factory.
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