Frame style UV sterilizer design-Fornitore globale

No. 4, Hebei University of Technology Science and Technology Park, Economic and Technological Development Zone, Xingtai City, Hebei Province

Frame style UV sterilizer design

Design principles for wastewater ultraviolet disinfection equipment

The sterilization principle of ultraviolet light is to use the energy of ultraviolet light to destroy the DNA of various viruses, bacteria, and other pathogenic bodies in water. Ultraviolet light penetrates the cell membrane and nucleus of microorganisms, destroys the molecular bonds of nucleic acids, and causes them to lose their replication ability or activity and die. The ultraviolet sterilization band is between 200-300nm, with the 253.7nm band having the strongest ability.

UV disinfection technology has the advantages of safety, efficiency, low cost, and no by-products. After UV disinfection, there is no secondary pollution or by-products, and the effluent can be reused for irrigation in farmland, forest land, or underground water injection, achieving resource utilization.

Design Basis

2.1 Disinfection standard: The fecal coliforms in the effluent should not exceed 1 × 10³MPN/L (Grade A standard); The fecal coliforms in the effluent should not exceed 1 × 10⁴MPN/L (Grade I B standard) (30 day geometric mean).

2.2 UV dose: The effective UV dose that the system can achieve at the end of the lamp life when the peak flow rate and UV transmittance are 65%, that is, the biological verification dose of the sterilizer should not be less than Class A standard and should not be less than 20000 µ Ws/cm²The first level B standard cannot be lower than 16000 µ Ws/cm².

Composition of equipment

The sewage ultraviolet disinfection equipment system consists of four main parts: ultraviolet disinfection module, control system, effluent system, and cleaning system.

Each standardized ultraviolet disinfection module consists of a stainless steel lamp holder, ultraviolet lamp tube, quartz sleeve, and cleaning structure. The entire system is composed of several ultraviolet disinfection modules, which are easy to install, operate, and maintain.

uv lamp	quartz sleeve
1. Adopt imported low-voltage high-strength ultraviolet lamps; The effective working life of the lamp can reach 12000 hours; The aging coefficient of the lamp is not less than 80%, with good anti-aging performance; 3. The UV output intensity of a single lamp tube is ≥ 105W	1. International fused silica tube bushing standard shall be adopted; 2. Quartz tube UVC transmittance ≥ 90% 3. Excellent sealing performance, effectively preventing water from coming into contact with UV lamps 4. The lamp tube is double sealed to prevent the quartz sleeve from accidentally breaking and affecting other modules.
electronic ballast	control system
1. Introducing German technology with input instantaneous overvoltage protection; 2. Low peak coefficient, with a peak coefficient less than 1.7, effectively extending the lifespan of the lamp tube; 3. It has automatic sound and light alarm function and can be remotely operated and monitored; 4. Xinao ballasts can also control the UV output intensity of the lamp tube according to customer requirements; 5. Power factor above 0.95, with a service life of up to 5 years.	1. Control the start and stop of the disinfection system through PLC program; 2. The PLC system can be connected to the upper computer to achieve near ground and remote switching control; 3. Single lamp running time monitoring function in the disinfection system; 4. Real time monitoring and display of the operating status of all devices in the system; 5. Monitoring and display function of ultraviolet intensity; 6. Use Siemens electrical components to ensure the safety and stability of the control system.
Cleaning system	Water outlet system
1. Adopting a magnetic central drive and parallel cleaning structure, there is no compression on the quartz sleeve, making cleaning more stable; 2. The cleaning ring adopts EPDM rubber rings, and fluororubber has the advantages of corrosion resistance, acid and alkali resistance, and aging resistance; 3. The wear of the quartz sleeve is minimal, and long-term use can ensure that the transmittance of the quartz sleeve reaches 90%; 4. It has a scheduled cleaning function and can also be manually started.	There are two main ways to discharge water from the open channel ultraviolet disinfection system: 1. Characteristics of automatic door tapping: small footprint, no need for power, convenient control, suitable for continuous water discharge; 2. Characteristics of overflow weir: Accurate water level control, suitable for both continuous and intermittent discharge, with low head loss.