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Are you familiar with flow-through UV sterilizers?

2022-11-25

Are you familiar with flow-through UV sterilizers?

　　 Flow-through ultraviolet sterilizer The working principle is as follows: Wastewater treated by the sewage treatment system flows through a flow-through ultraviolet sterilizer installed in an open-channel ditch. The ultraviolet lamp on the flow-through sterilizer emits short-wave ultraviolet light with a central wavelength of 253.7 nm, which effectively disinfects the water flowing through the ditch, thereby addressing the issue of excessive bacterial levels in the treated wastewater and ensuring that the discharged water meets and even exceeds the requirements of relevant national discharge standards and water quality standards.

　　The flow-through ultraviolet sterilizer includes a power circuit and its operation, a dedicated UV electronic ballast, and mechanical equipment control system software. Some operations are controlled by a PLC, which manages the timed execution, operation, and shutdown of the mechanical equipment. The control module operates independently and can display operational information for each UV lamp.

　　The flow-through ultraviolet sterilizer includes a dedicated UV ballast and an equipment control circuit system that are matched with the electrical circuit and control system. In the control section, we use PLCs from brands such as Omron and Siemens to manage the device’s timing, operation, and shutdown. This module is independently controlled and can display the operational status of each UV lamp as well as other relevant functions. The electronic control box is made of stainless steel.

　　Features of flow-through UV sterilizers:

　　1. Single-lamp power: 400W–10KW.

　　2. Energy Efficiency: With a broad-spectrum germicidal capability, it delivers multi-stage continuous UV output (100–400 nm), whereas other low-pressure systems emit only at 253.7 nm, achieving a 99.9% sterilization rate. It operates under a high pressure of 16 kg and is resistant to temperatures up to 100°C.

　　3. Degradation of organic matter in water: The 185nm short-wave ultraviolet output from medium-pressure UV lamps effectively degrades TOC in water, with a transmittance exceeding 97%.

　　4. Wider wavelength range: It can separately output at 245nm, 297nm, and 340nm to degrade harmful byproducts such as monochloramine, dichloramine, and trichloramine. This reduces the pungent odor in swimming pools and improves the pool environment.

　　5. Compact and lightweight, with a length not exceeding 70 millimeters.

　　6. Reduce the number of UV lamps and the reactor volume—(with a flow rate of 969 tons/hour, only four lamps are needed, resulting in a small reactor volume).

　　7. Biological effects: No chemical agents are added, and there is no secondary pollution.

　　Flow-through UV sterilizers feature high power and large processing capacity, making them ideal for disinfecting and sterilizing high-flow water sources such as swimming pool water and aquaculture water. At the 2012 London Olympics, the swimming venue adopted medium-pressure UV sterilization; thus, the use of flow-through UV sterilizers in swimming pools has become an emerging trend. The UV sterilizer controls all parameters—including disinfection equipment settings, fault diagnostics, lamp operating hours, UV lamp status, and parameter configurations. Through a human-machine interface, operators can easily monitor the operation of the UV disinfection system and ensure that the disinfection process delivers an effective sterilization dose.


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On the Installation and Function of Flow-Through Ultraviolet Sterilizers

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Maintenance Methods for Secondary Water Disinfection Equipment