Shanghai UV disinfection

Shijiazhuang Environmental Protection Equipment Co. 15511632289/13363862379 QQ1955260019 Ling Zhao Shanghai UV disinfection, ultraviolet disinfection, water tank self-cleaning disinfection Shanghai ultraviolet disinfection effect: UV disinfection price calculated by fecal coliform kill rate in most living drinking water systems, ultraviolet disinfection sterilization targets in addition to fecal coliforms and many other organisms. Choose fecal coliform as an ultraviolet disinfection sterilization target is mainly due to: 1, which is the most common research goal ultraviolet sterilization of bacteria; 2, it has a reliable standard measurement method; 3, fecal coliform water purification target organisms systems; 4. Select fecal coliform as an ultraviolet disinfection sterilization objective findings can provide a reference for comparison with other methods of sterilization of microorganisms. 254 nm UV transmittance, turbidity, total suspended solids (TSS) concentration, an important factor in these parameters also affect UV disinfection sterilization effect. At the same time we calculate fecal coliform kill rate can be calculated UV disinfection power and the calculated power UV disinfection UV disinfection can determine the basic price of. Shanghai UV disinfection Principle: Ultraviolet germicidal effect of fecal coliform very effective. In most cases, 25 W of UV disinfection disinfection device capable of 31.5 min (1895 s) within the 340 L water in about 99% of fecal coliform kill. Similarly, in the 40W UV through fecal coliform removal after 5 cycles of 99%. The results show that the input power units UV water bodies, water sterilization by UV light traffic and 254 nm UV transmittance of ultraviolet disinfection effect affecting three important factors. UV water input unit greater the power, the better sterilization; greater flow of water in the ultraviolet light disinfection reactor residence time is short, a single reduced by the amount of ultraviolet disinfection sterilization, but due to increased water cycles, total bactericidal effect increased; 254 nm UV transmission rate is higher, sterilization better, but because the transmission rate is dependent on the water quality of water to be treated, the actual operation is not easy to change. In order to improve the treatment effect, ultraviolet disinfection equipment yangzhi in the circulating water system should maintain a high transmission rate and output power, and control the flow of good water to ensure a longer exposure time sterilization. Shanghai UV disinfection in practical applications, a UV disinfection UV power output with the UV lamp life will change. Currently, the useful life of the domestic UV lamp is generally 8000 ~ 12000h, the useful life of imported low-voltage lamps up to 8000 ~ 12000h. UV disinfection manufacturers Shijiazhuang Environmental Protection Equipment Co., Ltd. Ling are used in well-known brands of high-strength low-pressure UV lamp. UV disinfection power design, the EPA recommended that the power efficiency of each UV disinfection equipment is 0.7. This can guarantee UV disinfection power under the premise, to precisely calculate the price of UV disinfection. Relationship between ultraviolet transmittance: When the transmission rate of less than 20% / cm, day sterilization factor will reduce the transmittance with significantly decreased. When the transmittance of greater than 20% / cm, multiple daily sterilization increases the transmittance rises slowly, especially at lower cycle rates, ri sterilization multiples rise more slowly. Therefore, in order to get a better effect of ultraviolet disinfection sterilization, water 254 nm UV transmittance preferably kept 20% / cm or more. UV on aquatic yangzhi circulating water sterilization effect 261 constant k = 0.0062 m 2 / J obtained under. However, there is a sewage system in a variety of micro-organisms, and different types of bacteria survival in different ultraviolet disinfection sterilization process, leading to inactivation of their different rate constants. Shanghai UV disinfection inactivation rate constants for the smaller species, by increasing the daily cycles of little use to enhance the sterilization effect. In this case, UV disinfection UV disinfection efficiency with increasing power will be significantly improved. Smaller species deactivation rate increases with UV germicidal power increases the Uniform increasing trend, but for the deactivation rate greater strains, the bactericidal rate of UV power is less than 9W / m 3 (E. coli) and 18W / m 3 (fecal coliform), the increase in power can significantly increase UV sterilization factor, and with the power to further increase the UV sterilization is not a multiple increase. Shanghai UV disinfection Introduction: Shanghai UV disinfection and other reactor tube spacing should be in accordance with the desired dose fushe lamp power and maintenance requirements identified. Lamp spacing should not be too close, to avoid the ambient temperature is too high and affect luminous efficiency. At the same time, the lamp spacing should not be too far away, to ensure that the irradiation intensity of UV disinfection. During the actual treatment, the water flow is constantly changing. Should therefore be based on the range of possible changes in flow, the use of automatic control device fushe processing power flow is controlled according to the size of the flow. Avoid ultraviolet disinfection produces disinfection fushe insufficient or due to lack of traffic leaving the lamp overheating. If no further dosing of disinfectants, UV disinfection were sterilized water residence time in the pipeline should not exceed 3 ~ 5h. Water distribution system should be designed to ensure that the appropriate data or consider cycling measures. From the perspective of the water treatment process to consider the general aspects of UV disinfection disinfection are mostly located in the final stages of the purification process. To avoid microbial fushe ultraviolet light after the reactivation and proliferation produce, after ultraviolet disinfection device from water point to water pipes should be opaque material. UV disinfection system before initial operation and after long outage restart, should the use of chemical disinfectants on equipment and piping systems thorough disinfection. Ultraviolet disinfection system powered devices to consider all fushe unit module supply data show, shigubaojing, work accumulated time display and control switch, just the power supply voltage fluctuation range of more than 5%, could be considered the regulator or regulator device. Unstable voltage will affect lamp life, low voltage will affect the luminous power, influence bactericidal effect (usually low pressure lamps supply voltage fluctuations up and down at 10 percent, sterilization capability of the lamp is between about 15% to 20% change ). The lamp power supply security considerations usually associated with standard power supply system the same standard, ultraviolet disinfection to consider backup power and leakage, electric shock protection devices. For ultraviolet disinfection water treatment device smaller terminal disinfection, consider using water start automatic power hoist system to save energy, but to consider the impact of power frequently start working life of the lamp. Often before the actual ultraviolet disinfection reactor pressure set to adapt to the band limiting device, and install UV probes to detect fushe intensity, when devices are more inconvenient and reactor management, according to the signal should be configured to automatically shut off the flow of manipulation institutions in order to ensure water safety. Conditional project should be realized ultraviolet disinfection device automated operation. Another important application of Shanghai UV disinfection disinfection technology is regeneration disinfection, also had the most stringent sterilization standard process flow for a class. Drinking water, high-rise buildings, yiyuan, storage tank factory; production of water food and beverage industry, as well as rivers, lakes and underground for the water supply system, are required to install the Shanghai UV disinfection process