Application of large flow security filter in waterworks: Lifeldt technology innovation to help water quality safety Introduction: The core challenge of water quality treatment in waterworks - As the core hub of urban water supply system, waterworks bear the heavy responsibility of converting raw water into national drinking water standards. However, with the acceleration of industrialization and urbanization, the problem of water pollution is becoming more and more serious, and the removal of suspended matter, microorganisms, organic matter and small particles has become a key link in the water treatment process. Traditional filtration equipment generally has problems such as flow bottleneck, high maintenance cost, and insufficient filtration accuracy, which is difficult to meet the needs of modern waterworks for efficient, stable and low-energy treatment technology. 1. Product structure and material innovation Lifeldt large flow security filter adopts modular design concept, the core components include 304 stainless steel filter shell, wedge mesh filter element and automatic control system. The filter shell material is made of SUS304 stainless steel with a pressure resistance of 1.6MPa to ensure long-term stable operation of the equipment in a complex water quality environment. The filter design breaks through the traditional structure, using 6.5 inches (165mm) large diameter without skeleton design, fluid flows from outside to inside, the effective filter area is more than 3 times higher than the traditional filter, and the flow rate of a single filter can reach 30m³/h. In addition, the porosity of the wedge mesh filter element is precisely calculated, and the continuous filtration accuracy of 0.1-100μm can be adjusted to meet the needs of different water quality treatment stages. 2. Efficient filtration mechanism and automatic control The filter achieves deep purification of water quality through the three-stage filtration system: first-stage pre-filtration intercepts ≥50μm suspended particles, two-stage precision filtration removes 1-5μm impurities, and three-stage security filtration ensures that the turbidity of the effluent is less than 0.1NTU. The filter process adopts PLC intelligent control system, real-time monitoring of the inlet and outlet pressure difference, flow rate and filter element life, when the pressure difference exceeds the set threshold (such as 0.2MPa), the system automatically triggers the backwash procedure. Backwashing uses compressed air and water flow to reverse wash the filter element, and with the self-cleaning structure of the wedge mesh, a single backwashing time is only 30 seconds, and the flux recovery efficiency is more than 98%, significantly extending the filter replacement cycle to 6-12 months. 3. Compatibility and economic advantages Lifelter products are compatible with multi-media pretreatment systems and membrane filtration technologies (such as ultrafiltration, reverse osmosis), and can be used as a pre-protection unit for nanofiltration (NF) and reverse osmosis (RO) devices to effectively prevent membrane element clogging. Its high-flow design greatly reduces the number of filter elements and equipment volume, such as a single device can replace the traditional 10 filter elements, reducing the initial investment cost by 30%. In terms of operation energy consumption, the filter pressure loss is controlled within 0.05MPa, the annual power saving rate is 25%, and the comprehensive operating cost is reduced by 15%-20% compared with similar products.
1. Raw water pretreatment stage In the conventional treatment process of the waterworks, the Lifeldt high-flow security filter is usually arranged behind the coagulation sedimentation tank and sand filter. Its high-precision filtration capability removes residual fine suspended matter, algal debris and colloidal substances, providing high-quality influent for subsequent disinfection processes. For example, in the application case of a water plant treating 100,000 tons of water a day in the Yangtze River Basin, the device reduced the raw water turbidity from 15NTU to 0.3NTU, and the SDI value was stabilized below 3, significantly improving the treatment efficiency of subsequent ozone oxidation and biological activated carbon filters. 2. Advanced treatment process guarantee In the face of increasingly stringent drinking water standards (such as GB 5749-2022), membrane technology has become the core direction of waterworks upgrading. As the "guardian" of the membrane system, the Liefert security filter effectively prevents surface contamination and scratches by intercepting ≥5μm particles. After a water plant in North China installed the equipment in front of the ultrafiltration membrane, the membrane cleaning frequency was reduced from twice a week to once a month, the water recovery rate was increased to 95%, and the chemical consumption was reduced by 40%. 3. Emergency water supply scenario In the event of sudden water source pollution, the filter can be quickly deployed to form a mobile emergency treatment unit. Its modular combination design supports multiple parallel operation, and a single system can handle up to 5,000 tons per day. In 2024, when heavy rain in a southern city caused a sudden rise in water turbidity, Lifelt equipment completed emergency installation within 72 hours, and successfully treated raw water with excessive turbidity to meet the direct drinking standard by adjusting the filtration accuracy to 1μm, ensuring the water safety of 300,000 residents. Four, technical advantages and industry impact Lifelte large flow security filter with the following core advantages to reshape the water treatment plant water treatment technology pattern: ** Performance breakthrough ** : a single filter flow through the traditional limits, to achieve 30m³/h flux, the same treatment scale equipment footprint reduced by 50%** Intelligent operation and maintenance ** : Internet of Things monitoring system to achieve filter life prediction, remote fault diagnosis, operation and maintenance labor cost reduced by 70%** Environmental protection design ** : Filter adopts 100% recyclable PP material, backwash wastewater COD value is less than 50mg/L, in line with zero emission requirements ** Standardized compatibility ** : The interface meets the ISO 228-1 standard and seamlessly connects with mainstream water treatment system integrators. The application of this technology promotes the formation of a new standard of "large flow + high precision + low energy consumption" in the industry. According to the statistics of the "2024 Water Equipment White Paper", the market share of Lifelt products has reached 65% of domestic water works upgrading projects, driving the overall efficiency of the industry to increase by 18%. Conclusion: Technology iteration drives the revolution of water supply security Lifeldt large flow security filter provides an efficient and reliable water quality assurance scheme for waterworks through the deep integration of material innovation, structure optimization and intelligent control technology. In the context of the high-quality development strategy of the "14th Five-Year Plan" water, the technology not only solves the pain points of traditional filtration equipment, but also promotes the technological upgrading of the industry by reducing cost and increasing efficiency. In the future, with the continuous improvement of drinking water standards and the popularization of smart water systems, such equipment will play an increasingly important role in the urban water supply security system, laying a solid technical foundation for the construction of sustainable water supply networks
