UVC 222nm lamp can kill almost all bacteria and viruses quickly and efficiently, and is harmless to the human body. It can also accurately control the sterilization process. It can be used in the whole process of people taking rail transit to achieve continuous and effective disinfection. Although the current cost of UVC 222nm is higher, the service life is several times that of mercury lamps, which saves the cost of procurement and installation to a certain extent. "Subway stations mainly include entrance and exit passages, security check ticket halls, elevators, boarding areas, toilets and other areas. According to the characteristics of the subway space, different types of ultraviolet lamps are controlled:

 

▲ Unified centralized control is adopted for large open spaces such as entrances and exits, security check ticket halls, and passenger areas

 

▲ Adopt automatic disinfection control for elevator hall

 

▲ Flexible disinfection control is adopted for toilets, and the disinfection time can be flexibly controlled locally and managed flexibly.

 

Disinfection of indoor air

(1) Indirect irradiation method: High-intensity ultraviolet air sterilizer is the first choice, which not only has a reliable disinfection effect, but also can be used when there are people moving indoors. Generally, it can be disinfected for 30 minutes after starting the disinfection.

(2) Direct irradiation method: Under the condition of no one indoors, the ultraviolet lamp can be directly irradiated by hanging type or mobile type.

When using indoor hanging UV disinfection, the number of indoor UV disinfection lamps (30W UV lamps, with an intensity of >70uW/cm2 at 1.0 meters) is not less than 1.5W per cubic meter on average and the irradiation time is not less than 30min.

1.4.3 The disinfection of water and other liquids can be carried out by water irradiation or water external irradiation. When using the water irradiation method, the ultraviolet light source should be equipped with a quartz glass protective cover. No matter which method is adopted, the thickness of the water layer should be less than 2cm, and determine the water flow speed according to the intensity of the UV light source. The water after disinfection must meet the national standard.