The ultraviolet(UV) disinfection technology used in the ultraviolet(UV) sterilizer has been widely used in many fields,not only in the disinfection of groundwater for domestic water,the water supply after disinfection of the urban secondary water supply tank, the disinfection of swimming pool circulating water, the algae elimination of landscape water,and the disinfection of hospital water.As well as hospital wastewater disinfection,it can also be used in the disinfection of circulating water.
UV sterilizer disinfection structure: according to the difference of the water flow boundary, it is divided into two systems: closed and open.
1. Closed system
The enclosed UV ultraviolet sterilizer is a pressure-bearing type, and the sterilized water is sealed with a metal cylinder and an ultraviolet lamp with a quartz sleeve.
The cylinder body is usually made of stainless steel, and the inner wall is mostly polished to improve the reflection ability of ultraviolet rays and enhance the radiation intensity. The number of ultraviolet lamps can also be adjusted according to the amount of treated water.
The closed type is also divided into open type and submerged type. Open sterilizers are suitable for medium and large water treatment, and are mostly used in sewage treatment plants. Closed sterilizers are generally suitable for medium and small water treatment or when it is necessary to apply pressure. The sterilizer cannot be used in open channels.
In various systems, the UV lamps with the outer cover sealed quartz sleeve can be arranged perpendicular or parallel to the direction of the water flow. The parallel system has small hydraulic loss and uniform water flow pattern, while the vertical system can make the water flow and improve the disinfection efficiency.
2. Open System
Water that is sterilized in an open UV sterilizer flows through the UV sterilizer by gravity and inactivates microorganisms in the water. The open system can be divided into submerged and surface type.
The immersion method is also known as the underwater irradiation method. Put the ultraviolet lamp with the concentric quartz sleeve into the water, and the water flows around the quartz sleeve. When the lamp (group) needs to be replaced, use the lifting device to lift it to the working surface for operation. The structure of this method is relatively complicated, but the utilization rate of ultraviolet radiation energy is high, the effect is good, and the maintenance is easy.
The water surface type is also called the water surface irradiation method, that is, the ultraviolet lamp is placed on the water surface, and the parallel ultraviolet light generated by the parallel electron tube is used to disinfect the water body. This method is simpler than the immersion type, but has a large energy waste and poor sterilization effect, and is rarely used in actual production.
