Industry Applications
Matching Verification of Equipment and Working Conditions
Confirm that the rated flow and power of the disinfection system are consistent with the actual water supply/drainage flow on site to avoid energy waste caused by "oversized equipment with low flow" or insufficient irradiation dose due to "undersized equipment with high flow". Verify the matching of the equipment's rated voltage with the on-site power supply, and reserve an independent earth leakage protection switch to prevent voltage fluctuations caused by sharing the circuit with high-power water pumps.
Site and Pipeline Pre-Treatment
The installation location is preferably a dry, ventilated and light-shielded indoor area (e.g., pump room, equipment room) with the ambient temperature controlled at 5-40℃. Avoid direct sunlight, rain immersion, and high temperature and humidity that may cause malfunctions of electronic components. Clean up rust, sediment, welding slag and other impurities in the to-be-connected pipelines in advance, and conduct a pressure test on the pipelines before installation to prevent water leakage from contaminating the equipment circuit.
Complete Accessories in Advance
Prepare flange/quick-connect joints (304 stainless steel is recommended for corrosion resistance), sealing gaskets, supports, grounding devices matching the pipeline specifications, as well as valves and pressure gauges for flow regulation as needed. If the on-site water turbidity/SS is high, reserve the installation position for pretreatment equipment (filtration/sedimentation tank) in front of the disinfection system in advance.
Match Installation Direction with Water Flow
Install strictly in accordance with the water flow mark on the equipment body to ensure water flows in from the water inlet and out from the water outlet; reverse installation is prohibited. The disinfection system shall be installed horizontally (required by mainstream tubular equipment) to avoid water stratification and insufficient residence time of local water body caused by vertical installation. If vertical installation is required due to on-site space constraints, a special vertical UV disinfection system shall be selected.
Add a Flow Stabilization Section to Avoid Turbulence
Reserve a straight pipe section with a length of 5-10 times the pipe diameter in front of the water inlet of the disinfection system and a straight pipe section with a length of 3-5 times the pipe diameter behind the water outlet to reduce water flow turbulence caused by water pumps or elbows, ensure uniform water flow through the UV lamp tube area, and avoid insufficient irradiation dose due to excessively fast local water flow or scaling caused by excessively slow flow.
Reasonable Configuration of Valves and Meters
Install a gate valve/ball valve at the water inlet for water shutoff during equipment maintenance; install a pressure gauge at the water outlet to monitor the pipeline pressure in real time and prevent damage to equipment seals caused by excessive pressure.
If the on-site flow fluctuates greatly, add a flow control valve/frequency conversion device at the water inlet to ensure the actual flow does not exceed the rated flow of the equipment and the irradiation dose meets the standard.
It is strictly forbidden to install elbows, tees and reducing pipes immediately before and after the disinfection system to avoid water flow deflection impacting the lamp tube sleeves, causing sleeve damage or local sterilization blind zones.
Fix with Special Supports and Ensure Shockproof Performance
Fix the disinfection system on the ground/wall with stainless steel or carbon steel anti-corrosion supports, and add rubber shock-absorbing pads between the supports and the equipment to prevent vibration from water pump operation from being transmitted to the disinfection system, causing lamp tube loosening and sleeve rupture. Tighten the fixing bolts between the equipment and the supports evenly to prevent uneven water flow caused by equipment inclination.
Reserve Sufficient O&M Space
Reserve an operating space of ≥60cm on both sides of the equipment and a maintenance space of ≥the length of the lamp tube + 30cm at one end to facilitate later disassembly and cleaning of sleeves, replacement of lamp tubes and electronic ballasts. Reserve a space of ≥30cm at the top of the equipment for wiring and circuit maintenance, and avoid the equipment being close to walls/other equipment to prevent poor heat dissipation.
Independent Wiring and Reliable Grounding
The electronic ballast and control cabinet of the disinfection system shall be wired independently, and flame-retardant copper core wires with wire diameters matching the equipment power shall be used for power cords to avoid heating caused by excessively small wire diameters. The metal shell and control cabinet of the equipment must be reliably grounded (grounding resistance ≤4Ω) to prevent electric leakage and electric shock and ensure the safety of operators.
Seal Protection to Avoid Moisture
Seal the wiring ports of the junction box and control cabinet with waterproof sealing rubber rings and waterproof tape to prevent short circuit caused by water vapor entering. If installed in a humid environment (e.g., underground pump room), the control cabinet shall be equipped with a moisture-proof fan/dehumidifier, and equipment with a protection grade of IP54 or above shall be selected.
No Unauthorized Circuit Modification
Connect the power cord and control wire in strict accordance with the equipment manual, and it is forbidden to modify the matching wiring between the ballast and the lamp tube to avoid lamp tube burnout and ballast failure caused by inconsistent voltage. If additional functions such as online monitoring and automatic cleaning need to be added, wiring shall be done by professional electricians with clear line marks.
Quartz Sleeve Protection and Cleaning Device
Check whether the surface of the quartz sleeve is scratched or damaged before installation; replace the damaged sleeve immediately to prevent short circuit of the lamp tube caused by water leakage. Wipe the surface of the sleeve clean to avoid the impact of fingerprints and oil stains on UV transmittance. If the on-site water quality is prone to scaling (high content of calcium and magnesium ions), install a mechanical automatic cleaning device/chemical cleaning interface; the brush of the cleaning device shall be precisely matched with the sleeve to avoid scratching the sleeve.
Reflector and Light Shielding Device
For open disinfection equipment (e.g., tank submersible type), install a polished aluminum plate reflector around the lamp tube to improve UV utilization rate. If installed outdoors (special protective equipment), add a light shield to avoid the impact of direct sunlight on the accuracy of UV intensity monitoring and prevent rainwater from entering the equipment.
Calibration of Online Monitoring Equipment
If equipped with a UV intensity sensor and a turbidity sensor, fix the sensor in an area with uniform water flow (avoid dead water areas) during installation and complete the calibration in accordance with the manual to ensure accurate monitoring data and realize automatic equipment regulation.
The installation location is preferably between the water tank outlet and the pressurized water pump to prevent suspended solids in the water tank from entering the disinfection system. For a non-negative pressure water supply system, install it behind the steady flow tank to prevent impact on the equipment caused by negative pressure.
The equipment shall be close to the water supply pump to shorten the pipeline distance and reduce the risk of secondary pollution; it is strictly forbidden to install the disinfection system in the water tank for long-term immersion to avoid excessive scaling of the sleeve.
The channel type disinfection system shall ensure the water channel is horizontal and of uniform width. Adjust the height of the lamp tube during installation to make the water submerge the lamp tube sleeve by ≥5cm, avoiding sterilization blind zones caused by water flow exposing the sleeve; set up diversion at both ends of the water channel to prevent sediment from depositing under the lamp tube.
A precision filter (filtration accuracy ≤50μm) must be installed in front of the tubular disinfection system to remove suspended solids and fiber impurities in the sewage and prevent the sleeve from being scratched or wrapped.
Connect with the on-site pipeline by quick-connect joints, and check the sealing performance of the joints before installation to prevent water leakage. Ensure the equipment is placed horizontally during use to avoid dry burning of the lamp tube; drain the water in the equipment in time after use to prevent scaling of the sleeve and equipment corrosion.
Water Filling and Leak Detection
Slowly open the water inlet valve to fill the disinfection system with water, exhaust the air in the equipment, check for water leakage at flanges, joints and seals, handle water leakage points in a timely manner, and it is strictly forbidden to power on with water.
Power-On Test Run
After passing the leak detection, connect the power supply, start the equipment, and check whether the lamp tube lights up normally (blue-violet light under normal condition) and whether the ballast and control cabinet have no abnormal noise and overheating. After 30 minutes of operation, check whether the reading of the UV intensity sensor is within the standard range (≥70μW/cm²).
Flow and Dose Verification
Adjust the pipeline flow to the rated flow of the equipment, sample and test the effluent microbial indicators after 1 hour of operation to ensure the sterilization efficiency meets the standard. If the flow fluctuates, verify the operation stability of the equipment under the minimum/maximum flow without lamp tube flickering, alarm and other conditions.
Complete Installation Records
Record the equipment installation location, pipeline specifications, power supply parameters and commissioning data, and keep the installation drawings and acceptance report for later O&M and equipment upgrading.
It is forbidden to install the disinfection system directly without pretreatment; sewage/high turbidity water must be filtered first, otherwise the sleeve is prone to scaling, the lamp tube is easily damaged, and the sterilization efficiency is greatly reduced.
It is forbidden to install the UV disinfection system in a high-temperature, highly corrosive and strong vibration environment to avoid accelerated equipment aging and shortened service life.
Avoid collision and scratch of the quartz sleeve during installation, and tear off the protective film on the sleeve surface before water filling to prevent impact on UV transmittance.
Non-professionals are strictly forbidden to carry out circuit wiring and equipment commissioning to avoid safety accidents such as electric shock and equipment failure.
If the equipment needs to be out of service for a long time, drain the internal water, wipe the sleeve surface clean, cut off the power supply, and take dust and moisture protection measures.
