Summarize ultraviolet sterilization in a paragraph how
Ultraviolet germicidal some characteristics, advantages, parameters and principle: a, the characteristics of ultraviolet sterilization: ultraviolet sterilization effect is stronger, but for the objects of the penetration ability is very weak. It is suitable for the operating room, burn ward, infection wards and the space between the sterile disinfection and not heat-resistant items and mesa surface disinfection. It is ionization of electromagnetic radiation, ultraviolet radiation, penetration is about two powerful disinfection is impossible. Microbial contamination of water on the surface, can use ultraviolet disinfection air and kill bacteria. Second, ultraviolet air disinfector sterilization technology advantages: 1. High efficient sterilization, no resurrection; 2. Tube that is namely stop, without preheating; 3. 。 Coincidence of the elimination of halide reaction; 4. Do not contain mercury luminous technology, reduce environmental pollution; Instantaneous high-energy ultraviolet uv strong penetrating power, 6. Adopts pulse method, compared with the traditional mercury lamp energy saving 40% 60%; 7. Can change the energy distribution of light wavelength, wide application; 8. Generate heat is small, don't change the chemical composition of the product, taste, smell or PH value; 9. Thermal radiation reduced considerably, thoroughly eliminate the influence of thermal radiation to illuminate the product; 10. Modular design, easy to integrate into production equipment, perfect combination with production line step frequency pulse frequency; Three, ultraviolet air disinfector sterilization parameters: bacteria deoxyribonucleic acid ( DNA) And RNA ( RNA) And the strongest nucleoprotein uv absorption peak at 254 ~ 257 nm. Fine after absorbing uv, cause DNA chain rupture, nucleic acid and protein crosslinking broke down and kill the biological activity of nucleic acid, kill bacteria. Advantages: fast ultraviolet sterilization efficiency of common bacteria virus ( The intensity of radiation: 30000 & mu; W/cm2) Four, ultraviolet radiation sterilization principle: is the use of appropriate wavelength of ultraviolet air disinfector is able to destroy the microbial DNA in the body's cells ( Deoxyribonucleic acid) Or RNA ( Ribonucleic acid) The molecular structure of growing cell death and cause ( Or) Regenerative cell death, to achieve the effect of sterilization. After the test, uv sterilization effective wavelength range can be divided into four different sections: UVA ( 400 ~ 315海里) 、UVB( 315 ~ 280海里) 、UVC( 280 ~ 200海里) And vacuum ultraviolet ( 200 ~ 100海里) 。 Which can reach the surface of the earth through the protective ozone layer, and the clouds part only UVA and UVB rays. For sterilization speed, UV ultraviolet C in microbial absorption peak area, but by destroying microorganisms within 1 s DNA structure kill viruses and bacteria, and because UVA and UVB rays is outside the scope of microbial absorption peak, sterilization speed is slow, often take several hours to have antiseptic effect, in the practical engineering of several seconds irradiation hydraulic retention time, the part actually belongs to the invalid UV part. Vacuum ultraviolet penetration ability is very weak, tube and casing need to adopt high light transmittance of quartz, commonly used purification for degradation of TOC, is not used for sterilization. Therefore, UV disinfection is actually refers to UV ultraviolet disinfection C. UV disinfection technology is based on modern epidemic prevention, medical and optical dynamics, on the basis of using the special design of high efficiency, high strength and long service life of the UV ultraviolet C band ultraviolet irradiation in the air, the air in a variety of bacteria, viruses, parasites, and other pathogens directly kill, achieve the purpose of disinfection. Studies have shown that uv is mainly based on the microbial pathogens such as bacteria, virus, spores in radiation damage and damage the function of the nucleic acid kill microorganisms, and thus achieve the purpose of disinfection. Ultraviolet (uv) on the function of nucleic acids can lead to the key and chain rupture, crosslinking and photochemical products, etc. , between stocks which changed the biological activity of DNA, the microbe itself cannot be copied, this uv damage is also fatal injuries.