UV water sterilizer
Potabilization of water Treatment
UV water sterilizer (Ultraviolet sterilizer) refers to a device that uses an ultraviolet mercury lamp as a light source and uses 253.7nm ultraviolet rays radiated by mercury vapor in the tube as the main spectral line to sterilize drinking water (abbreviated as sterilizer).
UV disinfection has no dead ends, good light emission conditions, low energy consumption, equipment installation and removal flexibility, no secondary pollution, UV disinfection is relatively chlorine sterilization, he has no need to add chemicals, no secondary pollution, no The mixing equipment greatly reduces the operating cost of the equipment. If it is drinking water, the ultraviolet sterilizer is safe and will not adversely affect the human body due to the excessive amount of medicine. Compared with the ozone sterilizer, the ultraviolet sterilizer has the advantages of low energy consumption, no large mixer, no fishy smell, etc., which not only has a good look and feel, but also reduces operating costs. There are also UV air purifiers.
The enclosed UV 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 barrel is usually made of stainless steel or aluminum alloy, and the inner wall is 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 water processed . Some sterilizers are equipped with spiral blades on the inner wall of the cylinder to change the motion state of the water flow and avoid stagnant water and pipeline blockage. The resulting turbulence and the sharp edges of the blades will break the suspended solids and fully expose the attached microorganisms. In the ultraviolet radiation, the disinfection efficiency is improved.
The closed type is also divided into open type and submerged type. The open-type sterilizer is suitable for the treatment of medium and large amounts of water, and is mostly used in sewage treatment plants. Closed sterilizers are generally suitable for the treatment of medium and small amounts of water or when pressure is necessary and 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, while the vertical system can make the water flow turbulent and improve the efficiency of disinfection.
Ultraviolet sterilizer is widely used
UV sterilizer has high value in water treatment. It destroys and changes the DNA structure of microorganisms through the irradiation of ultraviolet light, so that the bacteria die immediately or cannot reproduce their offspring to achieve the purpose of sterilization. It is ZXB ultraviolet that really has the bactericidal effect , because the C-band ultraviolet is easily absorbed by the organism’s DNA, especially the ultraviolet around 253.7nm. Ultraviolet sterilizer is a purely physical disinfection method. It has the advantages of simple and convenient, broad-spectrum and high-efficiency, no secondary pollution, easy management and automation. With the introduction of various new-designed ultraviolet lamps, the application range of ultraviolet sterilization has also continued Expanding.
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How does the UV sterilizer work?
1. Sterilized water
2. Pre-treated water
The water sterilized in the open UV sterilizer flows through the UV sterilizer under the action of gravity and inactivates microorganisms in the water. The open system can be divided into two types: submerged type and surface type. The immersion method is also called the underwater irradiation method. Place the UV lamp with concentric quartz sleeve into the water, and the water flows around the quartz sleeve. When the lamp (group) needs to be replaced, use a 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 method 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 disinfects the water body. This method is simpler than the submerged method, but has a greater energy waste and poor sterilization effect, and is rarely used in actual production.