Ultraviolet disinfection methods and precautions

Ultraviolet disinfection methods and precautions

Ultraviolet lamps are commonly used in medicine, drinking water and food, and are increasingly used in the home. The UV disinfection lamp radiates UV rays with a wavelength of 253.7nm. The ultraviolet band has the strongest sterilization ability, which can be used for disinfection and sterilization of water, air, clothing, etc. The commonly used UV disinfection lamps in pig farms have specifications of 15W, 20W, 30W and 40W, and the use voltage is 220V. They are mainly used for disinfection and sterilization of personnel, and are generally installed in disinfection dressing rooms, veterinary rooms and laboratories. The bacteria and viruses carried on clothes can be killed by exposure to ultraviolet disinfection lamp for about 5 minutes. It can also be used to disinfect the air of laboratories and operating rooms requiring clean air. The bacteria in the air can be killed by irradiation for about 30 minutes.

Uv disinfection lamp, mainly divided into: high pressure, medium pressure and low pressure. Disinfection application, mainly low pressure. The same UV disinfection power supply is also much in low power, high power UV disinfection power is often used for large area of venues disinfection.

Ultraviolet disinfection

Ultraviolet can kill bacteria, mold, viruses and monocytic algae, the use of ultraviolet lamp direct irradiation disinfection application power supply is 220V, in the process of use, should keep the surface of the ultraviolet lamp clean, generally wiped once a week with squeezed dry alcohol cotton ball, found that there is dust on the surface of the lamp, oil, should be wiped at any time.

When disinfecting indoor air with ultraviolet lamp, the room should be kept clean and dry, clean the dust before irradiation, close the doors and Windows during irradiation, stop people from moving around, extend the irradiation time properly when the temperature is below 20℃ or above 40℃, and the relative humidity is greater than 60%. One 30W UV lamp is installed every 10 square meters, the effective distance is not more than 2m, and the irradiation time is 30-60 minutes.

When disinfecting the surface of articles with ultraviolet light, if 30W ultraviolet light tube is used, the effective irradiation distance should be 25-1500px and the time should be 25-30 minutes (the articles should be spread out or hung to enlarge the irradiation surface).

Do not allow ultraviolet light source to shine on people, so as not to cause damage.

Uv intensity meter should be calibrated at least once a year.

The principle of ultraviolet disinfection: it mainly acts on the DNA of microorganisms, destroys the DNA structure, and makes it lose the function of reproduction and self-replication so as to achieve the purpose of sterilization and disinfection.