Principle, characteristics and precautions of UV disinfection

First, the principle of ultraviolet disinfection disinfection According to the difference of its biological effects, ultraviolet light can be divided into UV-A (320-400nm), UV-B (275-320nm), UV-C (200-275nm) and vacuum ultraviolet . In the water treatment, the UV-C portion of the ultraviolet ray is actually used, and in this band, ultraviolet rays having the highest sterilizing efficiency have been confirmed in the vicinity of 260 nm.
Ultraviolet sterilizers integrate comprehensive sciences such as optics, microbiology, mechanics, chemistry, electronics, and fluid mechanics. The high-level secondary water supply uses a high-intensity UV-C light generated by a specially designed high-efficiency, high-intensity and long-life ultraviolet UV-C light generating device to illuminate the flowing water. When irradiated bacteria in the water being subjected to a dose of ultraviolet UV-C light (wavelength 253.7nm). DNA and the cell structure is damaged, the cell can not be regenerated, so as to achieve water disinfection and purification. The wavelength line of 185 nm can also decompose organic molecules in water, generate hydrogen radicals and oxidize organic molecules in water to carbon dioxide to achieve the purpose of removing TOC.
Second, the ultraviolet sterilizer has the following advantages: 1, high efficiency sterilization: UV sterilization of bacteria, viruses, generally in one to two seconds can reach 99% -99.9% of the sterilization rate.
2, efficient sterilization broad spectrum: the broad spectrum of UV disinfection is the highest, its almost all bacteria, viruses can efficiently kill.
3, no secondary pollution: UV sterilization does not add any chemicals, so it will not cause secondary pollution of the water and the surrounding environment, does not change any components in the water.
4, the operation is safe and reliable: the traditional disinfection technology such as the use of chloride or ozone, the disinfectant itself is a highly toxic, flammable substance, and the UV disinfection system does not have such a safety hazard.
5, operation and maintenance costs of the low: a small area of ultraviolet disinfection equipment, structures requiring a simple and therefore less total investment, low running costs, the amount in tonnes of water level, its cost is only chlorinated 1 /2.
Third, UV sterilizer disinfection characteristics 1, UV sterilizer using high efficiency UV-C (LL or LH) UV lamp using the world's leading low-pressure high-intensity UV lamp, lamp life is guaranteed to be more than 8000-10000 hours.
2, ultraviolet disinfection high transparency, high purity quartz tube, ensuring more than 90% of ultraviolet rays through.
3, ultraviolet disinfection constant advanced, high-intensity UV special ballast, to ensure the normal operation of the entire system in a complex case.
4. The ultraviolet sterilizer is made of high-quality stainless steel as the reactor (304 or 316) and the inner wall of the reactor is specially polished to improve the sterilization effect.
Fourth, the installation of ultraviolet sterilizer notes:
1. The ultraviolet sterilizer should be installed horizontally. 2. The lamp tube and casing inside the ultraviolet sterilizer are fragile. During the installation process, gently handle it to avoid the impact of external force. 3. The ultraviolet sterilizer should be installed in a suitable place. Avoid installation in damp, water-prone areas to avoid the life of the nutrition equipment.
4. When the UV sterilizer is installed, it is necessary to leave a space for each device at both ends of the device, leaving room for future replacement of lamps and other components.
5, UV sterilizer regardless of the choice of one or more drinking water ancient ultraviolet disinfection in parallel, should be installed bypass piping and shut-off valve for easy maintenance.
6. When installing, select the power socket, wire or terminal block according to the voltage and power on the label of the UV sterilizer device.