range This standard specifies the classification, technical requirements, inspection rules, marking, packaging, transportation and storage of urban water supply and drainage ultraviolet disinfection equipment. This standard is applicable to ultraviolet disinfection equipment for drinking water, drinking water, urban sewage treatment plant water, urban sewage recycling water, and industrial wastewater treatment station. skills requirement 1 UV lamp life, ageing coefficient 1. The continuous operation or cumulative operating life of low-voltage lamps and low-voltage high-intensity lamps in UV disinfection equipment shall not be less than 12000h; the continuous operation or cumulative operating life of medium-pressure lamps shall not be less than 3000h. 2. After the UV lamp aging factor has been verified by a qualified third party, the UV-effective dose of the device can be calculated using the aging factor passed. If the aging factor of the UV lamp is not verified by a qualified third party, the UV effective dose should be calculated using the default value of 0.5 as the UV lamp aging factor. 2 UV lamp cleaning 1. Cleaning methods include manual cleaning, online mechanical cleaning, online mechanical plus chemical cleaning. In sewage treatment applications, on-line mechanical and chemical cleaning should be used. 2. The cleaning frequency is between 1/500 h and 1/h. 3. The life of the cleaning head wiper should be more than 3 years. 3 ultraviolet transmittance (UVT) and fouling coefficient 1. The UV lamp is mounted in a quartz sleeve and separated from the water body. The UVT of the clean quartz sleeve at a wavelength of 253.7 nm should not be less than 90%. 2. During use, the UV lamp quartz sleeve is in contact with the water body, and the contact surface will foul. The UV lamp casing fouling factor must be considered in the calculation of the UV effective dose of the device. The UV lamp casing fouling factor can be verified by a qualified third party and the UV effective dose of the device can be calculated using the scale factor passed. If the UV lamp casing fouling factor is not verified by a qualified third party, the default value of 0.8 should be used as the UV lamp casing fouling factor to calculate the UV effective dose of the device. 4 equipment UV effective agent f index Sewage disinfection In order to ensure that the secondary standard of the hygiene indicators required by GB 18918 and the B standard of the primary standard are met, SS (suspension in water) should not exceed 20 mg/L, and ultraviolet disinfection equipment should be at the peak flow rate and the end of the operating life of the ultraviolet lamp. The effective dose of ultraviolet light that can be achieved after considering the influence of the fouling of the UV lamp casing should not be less than 15 mJ/cm2. In order to ensure that the A standard of the first-grade standard of the hygiene index required by GB 18918 is met, when the SS does not exceed 10 mg/L, the ultraviolet disinfection equipment considers the fouling of the ultraviolet lamp casing at the peak flow rate and the end of the operating life of the ultraviolet lamp. The effective dose of ultraviolet light that can be achieved after the influence should not be lower than 20 mJ/cm2. Prior to engineering design and application, UV disinfection equipment should provide qualified third party inspection reports of similar equipment in similar water quality. Disinfection of drinking water or drinking water When ultraviolet disinfection is used as the main disinfection means for drinking water, the ultraviolet disinfection equipment should reach the end point of the peak flow and the end of the operating life of the ultraviolet lamp. The effective dose of ultraviolet light that can be achieved after considering the influence of the fouling of the ultraviolet lamp casing should not be lower than 40mJ/cm2. The disinfection equipment shall be provided with a qualified third party inspection report of the ultraviolet effective dose in similar water quality with similar equipment. Municipal wastewater recycling and disinfection UV disinfection as the main disinfection means for urban miscellaneous water, ultraviolet disinfection equipment at the peak flow rate and the end of the operating life of the UV lamp, the effective dose of ultraviolet light that can be achieved after considering the influence of UV lamp fouling should not be lower than 80mJ/cm2, UV disinfection equipment A qualified third party shall be provided with an inspection report of the UV effective dose in a similar water quality using similar equipment. 5 disinfection indicators 1. When UV disinfection equipment is applied to drinking water, urban sewage, urban miscellaneous water, and landscape environmental water, it should meet the hygiene requirements of GB 5749, GB 18918, GB/T 18920, and GB/T 50335, respectively. 2. When the UV disinfection equipment is used for drinking clean water, the drinking water should meet the hygiene requirements of the relevant standards. Wenzhou Gaoya Light Industry Machinery Co.,ltd. , https://www.hongyafitting.com
