What Is a UV Germ Light?

Ultraviolet germicidal lamps are actually a low-pressure mercury lamp. The low-pressure mercury lamp emits ultraviolet light by using low-pressure mercury vapor (<10-2Pa) to be excited. There are two main spectral lines: one is the 253.7nm wavelength; the other is the 185nm wavelength, both of which are naked to the naked eye Invisible UV.

UV germicidal lamp

Because ultraviolet rays can penetrate cells and cause them to die,

Ultraviolet disinfection is widely used in hospitals, schools, nurseries, movie theaters, buses, offices, homes, etc. It can purify the air and eliminate moldy odors. In addition, it can generate a certain amount of negative oxygen ions. Especially fresh. In public

In bacteria

(1) Some domestic unqualified ultraviolet lamps cannot provide the remaining disinfection ability. After the treated water leaves the reactor, some microorganisms killed by ultraviolet rays will repair the damaged DNA molecules under the photo-resurrection mechanism and regenerate the bacteria. Therefore, the principles and conditions of photoresurrection should be further studied to determine the minimum ultraviolet irradiation intensity, time or dose to avoid photoresurrection.

(2) The cleaning of the outer wall of the quartz sleeve is the key to operation and maintenance. When sewage flows through

Ultraviolet sterilization and disinfection lamp tube measurement of ultraviolet rays should use a special instrument for measuring ultraviolet rays --- ultraviolet irradiance meter, the ultraviolet lamp is placed horizontally during the test, and the detector of the ultraviolet irradiance meter is placed at a vertical distance from the center of the lamp tube At one meter, shield stray light at the same time. The UV germicidal lamp needs to be turned on for a period of time, and the measured data after the light source is stable is more informative.

Generally, the ultraviolet radiometer is composed of a measurement display and a detector (ie, a probe). Considering that the detector needs to be placed 1m below the light source during measurement, the new LS126C ultraviolet radiometer has a small sensor inside it. The strong magnet of the block facilitates the fixing of the detector during the measurement process. As long as a metal object that can be attracted by the magnet is placed in the corresponding position, the detector can be firmly fixed, and then the test can be conveniently performed.

The ultraviolet light emitted by the ultraviolet germicidal lamp is an invisible light, and the wavelength of 253.7nm can play a good bactericidal effect. This is because the absorption spectrum of the light wave of the cell has a regularity, and the ultraviolet rays at 230 ~ 280nm have the largest Absorbed, the absorbed ultraviolet light actually acts on the cell's genetic material, that is, DNA, which plays a photochemical role.

Personal safety when using germicidal lamps: Since ultraviolet rays can kill cells, care must be taken not to directly irradiate the human skin to avoid injury during ultraviolet disinfection.

The UV sterilizer must be equipped with a time accumulation prompt function and an intensity alarm function to remind the user to replace the UV lamp in time.

UV has been used in water treatment for decades. However, due to its complicated technology and high cost, its application is limited. But nowadays, the ultraviolet technology abroad has been widely used, banning the traditional chlorination disinfection, and the price is lower than the traditional chlorination disinfection. In the 1970s, due to the intensification of water pollution and the improvement of public health awareness, people were forced to adopt new methods based on traditional water treatment processes to ensure that the quality of water supplied meets more safe drinking water standards. After nearly two decades of research and practice, the composite application technology mainly composed of ultraviolet rays has become the first choice for deep purification technology of water supply with its good treatment effect.

Sample pictures (10 photos)

(1) Ultraviolet light is used for disinfection of effluent from secondary treatment of urban sewage, which can meet the current domestic landscape and greening water requirements.

(2) This technology has the characteristics of no secondary pollution, and has broad application prospects.

(3) Low energy consumption and low operating costs; high degree of automation; easy maintenance.

In addition, UV-disinfected sewage can be reused in many areas to realize sewage recycling. It can be used to irrigate farmland, forest land and lawns to avoid damage to plants by chemical disinfectants; used for groundwater recharge can prevent the formation of microorganisms from adapting to chemical disinfectants and causing breeding again. With the in-depth study of UV disinfection mechanism, the continuous development of UV technology, and the continuous improvement of the design of disinfection devices, UV disinfection is expected to become one of the main methods to replace traditional chlorinated disinfection.