Large scale ultrafiltration water purification equipment is customized high-flow membrane separation system designed for industrial parks, municipal water plants and centralized large-scale sewage treatment stations. As a heavy-duty industrial liquid filter with modular expandable framework and stable long-period operation performance, this large-scale device can be combined with modular assembled Industrial Skid Mounted Ultrafiltration Equipment, anti-fouling special Tubular Ultrafiltration Membrane, standard medium-sized Integrated Ultrafiltration Water Purification Equipment and universal Ultrafiltration Membrane Filter to form hierarchical water treatment schemes matching different enterprise water consumption gradients. This paper comprehensively analyzes structural layout, cross-flow separation working mechanism, unified industrial-grade technical indicators, strict factory quality supervision system and large-scale industrial application scenarios of large scale ultrafiltration water purification equipment, helping global large industrial purchasers solve stable water supply and wastewater recycling problems of high-volume water demand systems.
Large Scale Ultrafiltration Water Purification Equipment for Factory Water Projects
Large scale ultrafiltration water purification equipment is customized high-flow membrane separation system designed for industrial parks, municipal water plants and centralized large-scale sewage treatment stations. As a heavy-duty industrial liquid filter with modular expandable framework and stable long-period operation performance, this large-scale device can be combined with modular assembled Industrial Skid Mounted Ultrafiltration Equipment, anti-fouling special Tubular Ultrafiltration Membrane, standard medium-sized Integrated Ultrafiltration Water Purification Equipment and universal Ultrafiltration Membrane Filter to form hierarchical water treatment schemes matching different enterprise water consumption gradients. This paper comprehensively analyzes structural layout, cross-flow separation working mechanism, unified industrial-grade technical indicators, strict factory quality supervision system and large-scale industrial application scenarios of large scale ultrafiltration water purification equipment, helping global large industrial purchasers solve stable water supply and wastewater recycling problems of high-volume water demand systems.
Large scale ultrafiltration water purification equipment takes multi-group parallel ultrafiltration membrane modules as the core filtering unit, and integrates large-caliber pipeline system, high-power feeding pump group, centralized backwash system, unified chemical dosing cleaning station and central PLC centralized control cabinet on a whole steel platform skid. Different from small and medium-sized integrated ultrafiltration equipment, large-scale ultrafiltration purification equipment adopts distributed module layout, which can increase or decrease the number of membrane groups according to the actual water demand of the project to realize flexible capacity expansion without overall equipment replacement.
In LEFILIER’s product system, large scale ultrafiltration water purification equipment is mainly derived from the combined assembly of Industrial Skid Mounted Ultrafiltration Equipment. Multiple sets of single skid-mounted ultrafiltration units are connected through main pipes to form a large-scale centralized water treatment station. When the raw water of large projects contains a large amount of oil sludge, suspended sediment and high-concentration organic pollutants, we arrange open-channel Tubular Ultrafiltration Membrane in the front filtration section of large-scale equipment. The open runner structure is not easy to be blocked by large particles, and it supports automatic sponge ball online cleaning to reduce the overall pollution load of the whole large system. For branch water supply points inside the factory area that need medium water volume, users can configure matched independent Integrated Ultrafiltration Water Purification Equipment as branch processing equipment, forming a large main station + small branch station overall water treatment network. All membrane components used in large-scale ultrafiltration equipment adopt industrial universal Ultrafiltration Membrane Filter, unified specification is convenient for centralized bulk procurement of spare parts and unified maintenance management of the whole factory water system.
The main frame of large-scale ultrafiltration equipment is made of carbon steel with anti-corrosion coating or 304 stainless steel thick plate welding, which has strong structural stability to adapt to long-term 24-hour continuous operation in outdoor open sewage stations. Modified industrial PVDF membrane material is used in a large amount, with excellent chemical tolerance to adapt to complex raw water quality such as factory biochemical tail water and reservoir high-turbidity raw water. The central PLC control system can realize unified parameter setting, centralized backwash control, group fault monitoring and remote data uploading of all membrane modules, greatly reducing the number of on-site management personnel required for large water stations.
In practical industrial layout, large scale ultrafiltration water purification equipment is mostly used as the core pretreatment front end of large RO ultra-pure water systems and factory zero-discharge wastewater treatment systems, stably controlling the SDI of inlet water below 2.5, effectively avoiding overall pollution of large reverse osmosis membrane groups and reducing the overall operation cost of enterprise water treatment facilities.
The basic physical interception principle of large scale ultrafiltration water purification equipment is pressure-driven cross-flow sieving separation, and the biggest difference from small equipment lies in the balanced water distribution design of multi-module parallel operation. After the raw water is pressurized by the high-power pump group to the system design pressure of 1.0 ~ 4.0 bar, the raw water is evenly distributed to each parallel membrane module through the large-caliber main pipe and flow equalizing pipeline.
Large particle suspended matter, large colloidal aggregates and most organic pollutants are intercepted on the surface of the membrane filaments. Under the continuous scouring of cross-flow water flow, most pollutants are discharged out of the system through the concentrated water main pipe. The preliminarily purified water converges to the produced water main pipe after passing through the membrane pore channel to form qualified clear water, which is transported to the clean water tank for unified scheduling and use by each production workshop.
Two sets of group automatic maintenance programs are embedded in the central control system of large-scale ultrafiltration equipment. First is differential pressure linkage automatic backwashing: the system collects the pressure difference data of each membrane group in real time, automatically starts the unified backwash pump set to clean the membrane surface dirt when the set threshold is reached, and each membrane group can also set independent backwash time according to the actual pollution degree. Second is regular centralized CIP chemical cleaning: the acid-base agent is transported to each membrane module through the centralized dosing system to remove inorganic scale and organic biological film when the overall system flux decays obviously. If the front end is equipped with tubular membrane components, the automatic sponge ball cleaning system can be operated synchronously to strengthen the cleaning effect of high-pollution raw water.
Membrane material: Industrial modified PVDF; food-grade PES is optional for food & pharmaceutical large water plants
Optional MWCO: 30 kDa, 50 kDa, 100 kDa
Effective membrane pore size: 0.01 μm ~ 0.1 μm
Long-term allowable operating temperature: 5 ~ 45 ℃
pH application range: Continuous operation pH 2–11; cleaning pH 1–13 short-time tolerance
Design flux: 20 ~ 75 LMH (lower flux design for large equipment to extend membrane service life)
Optimal system operating pressure: 1.6 ~ 3.2 bar
Comprehensive water recovery rate of the whole system: 80% ~ 90%
Effluent turbidity: Stably lower than 0.05 NTU
Total bacteria interception rate ≥99.99%
Produced water SDI ≤2.5, meeting the high-standard pretreatment requirements of large RO systems
Frame material: Carbon steel anti-corrosion coating / 304 thick stainless steel plate
Control mode: Central PLC + touch screen + remote cloud data monitoring
Backwash mode: Timing + differential pressure dual trigger, group unified control
Chemical cleaning cycle: 1.5 ~ 5 months adjustable
Customizable single set water production: 50T/h ~ 1000T/h large tonnage specifications
All large scale ultrafiltration water purification equipment produced by LEFILIER adopts full-process quality tracking from membrane incoming inspection, steel structure processing, pipeline prefabrication to overall assembly and factory water passing test. Each batch of membrane elements used for large equipment must pass 100% bubble point integrity test to eliminate leakage and damage defects, ensuring the overall water outlet uniformity of multi-group parallel modules. The main pipeline welding adopts professional seamless pipe welding process, and the whole system is subjected to 1.5 times the working pressure hydraulic pressure test before leaving the factory to eliminate hidden dangers of pipeline leakage during long-term continuous operation.
Each finished large-scale ultrafiltration equipment must complete FAT factory acceptance test with simulated full-load water flow before delivery, verify the stability of overall water output, the synchronization of each group of backwash actions and the accuracy of central control data feedback, and deliver the equipment together with complete piping layout drawings, electrical control drawings and quality inspection reports after passing all items.
Our large-scale ultrafiltration products have obtained ISO9001, CE, NSF61 relevant certifications. Under standardized operation and regular group maintenance, the service life of hollow fiber PVDF membrane is 5–7 years, and tubular membrane can reach 6–8 years. We provide global on-site installation guidance and long-term bulk supply of spare parts for large engineering projects to solve the after-sales service problems of large water station operation and maintenance for customers.
With the characteristics of large processing capacity, stable long-term operation and expandable modular design, large scale ultrafiltration water purification equipment is widely used in large industrial scenarios:
Large chemical park centralized water supply & wastewater recycling: Realize unified purification and reuse of park production wastewater
Municipal waterworks raw water pretreatment: Purify river/lake raw water to meet municipal water supply preliminary treatment standards
Large pharmaceutical & beverage group centralized water preparation: Provide stable high-quality raw water for multiple production workshops
Thermal power plant circulating water treatment: Remove suspended impurities to reduce pipeline scaling and equipment corrosion
Large printing and dyeing industrial zone wastewater advanced treatment: Realize wastewater reduction and resource reuse
Large mine mining wastewater purification: Treat mine turbid wastewater for production reuse and standard discharge
Q1: What core advantages of large scale ultrafiltration water purification equipment compared with multiple small ultrafiltration machines?
A: Large-scale equipment adopts centralized unified control, centralized cleaning and centralized pipeline layout, lower overall civil construction cost and lower daily operation and management labor cost; modular design supports step-by-step capacity expansion according to enterprise water demand growth, with better overall system stability.
Q2: Can large scale ultrafiltration equipment remove salt ions and reduce the overall TDS value of water?
A: Ultrafiltration only intercepts particles, colloids and microorganisms, salt ions can freely pass through membrane pores. If overall desalination is required, large-scale ultrafiltration must be matched with large reverse osmosis system as front-end pretreatment.
Q3: Does the maintenance cycle of each group of membranes in large-scale ultrafiltration equipment need to be unified?
A: It can be set separately. The central control system can set independent backwash and cleaning cycles for each parallel membrane group according to the actual pollution data fed back by pressure difference, realizing targeted maintenance.
Q4: Can the water production of existing large ultrafiltration equipment be expanded later without replacing the main frame?
A: Yes, our large-scale equipment adopts modular reserved interface design. Users can directly add membrane module groups on the original skid frame and modify the control program parameters to realize capacity expansion without overall equipment reconstruction.
Q5: Is professional engineering construction team required for the installation of large scale ultrafiltration water purification equipment?
A: We provide complete installation layout drawings and detailed construction specifications, and support remote video guidance for customer construction teams; for super large tonnage equipment, we can arrange engineers for on-site guidance.
Q6: What problems will long-term unattended operation bring to large-scale ultrafiltration equipment?
A: If the automatic cleaning program fails or the membrane is severely fouled without alarm processing, the overall system water output will drop sharply, and long-term fouling will cause irreversible damage to a large number of membrane elements, increasing high replacement costs.
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