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Correct use of ultraviolet disinfection lamps

2023/04/01

Ultraviolet radiation is a low-energy electromagnetic radiation with poor penetrating power. Ultraviolet rays can be divided into long-wave (320-400nm), medium-wave (275-320 nm), and short-wave (180-275 nm). nm) three groups, the ultraviolet sterilizing power of 240-280 nm wavelength in the short wave band is relatively strong, and 253.7nm is generally used as the representative of germicidal ultraviolet wavelength. 1. How to use: 1. Disinfection on the surface of objects: portable ultraviolet sterilizers can be used for short-distance mobile irradiation, and ultraviolet light lamps can also be used for short-distance irradiation. Small items can be irradiated and sterilized in an ultraviolet disinfection box.

2. Disinfection of indoor air: ⑴Indirect irradiation method: high-intensity ultraviolet air sterilizer is the first choice, not only the disinfection effect is reliable, but also can be used when there are people in the room. Generally, the disinfection can be achieved within 30 minutes after starting the disinfection. ⑵Direct irradiation method: Under the condition of no one in the room, direct irradiation with suspended or mobile ultraviolet lamps can be adopted. When using indoor suspended ultraviolet disinfection, the number of ultraviolet disinfection lamps installed indoors is not less than 1.5W per cubic meter on average, and the irradiation time is not less than 30 minutes.

2. Issues that should be paid attention to when using ultraviolet light disinfection: 1. The surface of the lamp tube should be wiped frequently (once every two weeks) with 75% alcohol cotton balls to remove the dust and grease on it, so as to reduce the impact on the penetration of ultraviolet rays. 2. Ultraviolet rays are invisible to the naked eye. The blue light emitted by the lamp tube does not represent the intensity of ultraviolet rays. The irradiance value of the lamp tube should be checked regularly. The ultraviolet illuminance meter within the validity period of the calibration or the special indicator card for measuring the ultraviolet intensity can be used to judge the ultraviolet rays. Whether the lamp has reached the end of its service life. Those whose irradiation intensity is lower than 70μW/cm2 should be replaced in time.

3. During disinfection, the room should be kept clean and dry to reduce dust and water mist in the air. 4. The suitable temperature range for ultraviolet disinfection is 20°C-40°C. If the temperature is too high or too low, it will affect the disinfection effect. The disinfection time can be extended appropriately. When the relative humidity is greater than 80%, the irradiation time can also be extended appropriately. 5. Only the side directly irradiated by ultraviolet rays can achieve the purpose of disinfection.

6. Do not look directly at the ultraviolet light source. When working under ultraviolet rays, personal protection should be strengthened and protective glasses should be worn. 7. When purchasing ultraviolet disinfection lamps, the supplier should be required to provide the relevant manufacturer's hygiene license and product qualification certificate.

The service life of the ultraviolet disinfection lamp is generally about 8000 hours. If the lamp tube becomes unstable after being turned on or the diode of the lamp tube turns black, it should be replaced in time. It is recommended to use a dedicated ultraviolet intensity indicator card for daily monitoring to ensure the effectiveness of ultraviolet light disinfection. In water treatment, ultraviolet sterilizers need to choose different intensities of ultraviolet lamps according to different water quality. In wastewater treatment, it is necessary to use high-intensity ultraviolet lamps.

Because if a large number of ultraviolet lamps are used, the number of ballasts is also large, the circuit is more complicated, and the control part is also more complicated. Often, if one lamp is broken, it must be shut down for replacement and maintenance. And the more lamps and ballasts are used, the greater the probability of one being broken. Poolking is the best swimming pool equipment manufacturer and supplier in China. Poolking exists to provide the highest quality swimming pool equipment while offering competitive pricing..

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