Ultrafiltration desalination system is the vital pretreatment facility matched with reverse osmosis equipment in seawater and brackish water desalination engineering projects. Our factory supplies matched industrial liquid filter alongside a full lineup of supporting UF devices, including integrated packaged Ultrafiltration Integrated Water Purification Equipment, high-fouling-resistance Tube Type Ultrafiltration Membrane Equipment, intelligent unattended Fully Automatic Ultrafiltration Equipment for Industrial Water, brine wastewater recovery Wastewater Treatment Ultrafiltration Equipment, and customizable standardized Manufacturer of Ultrafiltration Membrane Water Purification. The ultrafiltration desalination system removes suspended solids, colloids, microorganisms and organic pollutants from raw saltwater, effectively protecting downstream reverse osmosis desalination membranes from contamination and scaling damage. This paper elaborates the structural composition, cross-flow filtration operating principle, unified technical indicators, strict whole-process quality control standards and practical desalination application scenarios of our ultrafiltration desalination system. Global desalination contractors, mining enterprises, island water supply projects and environmental traders can obtain spot supply, personalized structural reform and full-cycle after-sales technical service to stabilize the long-period efficient operation of the overall desalination unit and reduce system maintenance costs significantly.
High Efficiency Ultrafiltration Desalination System for Brackish and Seawater Treatment
Ultrafiltration desalination system is the vital pretreatment facility matched with reverse osmosis equipment in seawater and brackish water desalination engineering projects. Our factory supplies matched industrial liquid filter alongside a full lineup of supporting UF devices, including integrated packaged Ultrafiltration Integrated Water Purification Equipment, high-fouling-resistance Tube Type Ultrafiltration Membrane Equipment, intelligent unattended Fully Automatic Ultrafiltration Equipment for Industrial Water, brine wastewater recovery Wastewater Treatment Ultrafiltration Equipment, and customizable standardized Manufacturer of Ultrafiltration Membrane Water Purification. The ultrafiltration desalination system removes suspended solids, colloids, microorganisms and organic pollutants from raw saltwater, effectively protecting downstream reverse osmosis desalination membranes from contamination and scaling damage. This paper elaborates the structural composition, cross-flow filtration operating principle, unified technical indicators, strict whole-process quality control standards and practical desalination application scenarios of our ultrafiltration desalination system. Global desalination contractors, mining enterprises, island water supply projects and environmental traders can obtain spot supply, personalized structural reform and full-cycle after-sales technical service to stabilize the long-period efficient operation of the overall desalination unit and reduce system maintenance costs significantly.
Ultrafiltration desalination system acts as the front core pretreatment module before RO desalination host. Different from ordinary domestic water ultrafiltration devices, this system carries targeted structural and material optimization aiming at the characteristics of salt-containing raw water such as high turbidity, sediment enrichment, abundant biological impurities and soluble organic substances. The core filter element adopts salt-resistant, pollution-resistant modified PVDF hollow fiber or tubular ultrafiltration membrane with strong tolerance to brackish water and seawater environment. A complete set of ultrafiltration desalination system consists of ultrafiltration membrane component group, anti-corrosion stainless steel frame, salt-resistant raw water delivery pump, automatic backwash valve pipeline assembly, online acid-base chemical cleaning dosing unit, front security liquid filter and PLC centralized electrical control cabinet.
Raw seawater and underground brackish water will carry sediment, algae and biological mucus during collection and transportation. Direct access to reverse osmosis membrane will cause irreversible fouling, greatly shorten the service life of expensive RO membrane elements and increase frequent cleaning costs. After being treated by the ultrafiltration desalination system, the SDI value of produced water can be stably controlled below 5, meeting the strict water intake standard of desalination reverse osmosis system. All finished ultrafiltration desalination systems need to pass air tightness pressure test and 72-hour simulated salt water load operation aging test before leaving the factory to adapt to long-term continuous operation in coastal areas, inland saline-alkali land and other harsh environments.
We develop differentiated ultrafiltration products to match different desalination project scales and site conditions. Projects with narrow installation space adopt integrated skid-mounted Ultrafiltration Integrated Water Purification Equipment to save civil construction area. Brackish water with high sediment concentration selects wear-resistant and anti-blocking Tube Type Ultrafiltration Membrane Equipment to extend the cleaning cycle of membrane components. Large-scale centralized municipal desalination stations deploy intelligent Fully Automatic Ultrafiltration Equipment for Industrial Water to realize automatic backwashing and timing chemical cleaning without manual on-duty operation. The concentrated brine discharged during desalination operation can be recycled and treated by the supporting Wastewater Treatment Ultrafiltration Equipment. For customers with special water yield, salinity and layout requirements, we rely on the qualification of Manufacturer of Ultrafiltration Membrane Water Purification to complete personalized drawing design and customized production.
Frames and pipelines of standard ultrafiltration desalination system are made of SUS304 stainless steel; SUS316L stainless steel is selected for high-salinity seawater working conditions to resist electrochemical corrosion caused by salt ions. The control system supports local touch screen operation and optional remote cloud data monitoring. Our company provides standard spot inventory products, non-standard customized processing, OEM supporting production and complete CE certification documents to help overseas customers smoothly complete customs clearance and project acceptance work.
Ultrafiltration desalination system adopts pressure-driven cross-flow physical interception technology, and the built-in PLC program automatically switches three cyclic working modes: saltwater production filtration, automatic backwashing and regular chemical cleaning.
Original brackish water or seawater first removes large particle silt and impurities through the front security liquid filter, then is transported into the inner cavity of ultrafiltration membrane filaments by the anti-corrosion salt-resistant pump. Under the driving of operating pressure, water molecules and soluble salt ions pass through the membrane wall smoothly and flow into the intermediate water tank as qualified inlet water for the subsequent desalination RO system. Insoluble impurities such as silt, colloids, bacteria and algal microorganisms are intercepted on the inner surface of the membrane. The high-speed cross flow of raw salt water continuously scours the membrane surface to slow down the accumulation speed of pollutant filter cake and maintain stable permeation water flux in long-term operation.
As intercepted pollutants gradually accumulate, the pressure difference between the inlet and outlet of the membrane module rises continuously. Once the pressure difference reaches the preset alarm threshold, the system will automatically switch the pipeline electric valves. The clean produced water flows reversely into the membrane tube to wash away loose dirt attached to the membrane surface, and the dirt is discharged out of the system along with concentrated salt water. The whole backwashing process only lasts 3–8 minutes and will not cause long-term shutdown of the overall desalination production line.
A saltwater environment is easy to breed biological slime and form stubborn organic scale attached to the membrane surface. The supporting dosing system configures dilute acid and alkali cleaning solution for circulating soaking cleaning, which can thoroughly remove stubborn pollutants inside membrane pores, restore the original flux of ultrafiltration membrane components, and ensure the stable pretreatment capacity of the whole desalination system for a long time.
Membrane material: Salt-resistant anti-fouling modified PVDF hollow fiber / tubular membrane
Nominal membrane pore size: 0.01 ~ 0.1 μm
Interception rate of suspended solids, bacteria and colloids ≥99%
Treated produced water SDI value ≤5
Single set water processing capacity: 1m³/h ~ 200m³/h
Normal working pressure range: 0.10 MPa ~ 0.36 MPa
Applicable raw water temperature: 5℃ ~ 45℃
Adaptable raw water salinity: ≤35000 mg/L
Long-term stable operation pH range: 2 ~ 11; cleaning allowable pH range: 1 ~ 13
Overall system water recovery rate: 76% ~ 87%
Adjustable automatic backwash cycle: 10 ~ 60 min; chemical cleaning cycle: 1 ~ 3 months
Frame & pipeline material: SUS304 / SUS316L stainless steel (selected according to actual water salinity)
Control mode: PLC + touch screen full automatic control, remote monitoring function optional
Standard matching accessories: Salt-resistant feed pump, backwash pump, acid & alkali dosing tank, pressure transmitter, front-end security liquid filter
All ultrafiltration desalination systems are manufactured strictly in accordance with ISO9001 international quality management system standards, and export-oriented equipment is equipped with official CE certification to meet the market access standards of global desalination industries.
Incoming material inspection: Membrane filaments, corrosion-resistant steel structural parts, pumps, valves and electrical components are sampled and tested before warehousing to cut off unqualified raw materials at the source.
Production process inspection: Membrane module encapsulation, pipeline argon arc welding, internal circuit wiring and instrument calibration are inspected one by one by professional QC personnel, and complete traceable quality files are reserved for each production link.
Offline factory inspection: Each complete set of ultrafiltration desalination system must pass air tightness test and saltwater medium loading operation aging test before delivery to eliminate potential operation faults at the project site.
Export packaging & supply cycle: Sealed moisture-proof, shock-proof and rust-proof wooden case packaging is adopted for long-distance ocean transportation. Standard conventional models are in sufficient stock to respond to urgent project orders; customized equipment delivery period is controlled within 12–30 working days.
With standardized daily operation and maintenance management, the service life of PVDF ultrafiltration membrane elements can reach 5–8 years. We provide global spare parts supply service and lifelong free remote technical guidance for all cooperative project contractors and purchasers.
Coastal seawater desalination stations: Pretreatment supporting equipment for municipal island domestic water and factory production water desalination projects
Inland brackish water treatment: Underground saline groundwater improvement in northwest saline-alkali areas to reach domestic and industrial water standards
Mining & oil field water supply: On-site brackish water desalination pretreatment for field operation areas
Industrial high-salinity wastewater reuse: Desalination pretreatment for brine generated from chemical, electroplating and printing & dyeing industries
Offshore platform water preparation: Small and medium-sized ultrafiltration desalination pretreatment systems for marine working platforms
Q1: What core advantages does ultrafiltration desalination system have compared with traditional multi-media filtration pretreatment?
A: Ultrafiltration relies on physical membrane interception with stable outlet water quality and unaffected by raw water turbidity fluctuation; the occupied area is smaller, automatic operation reduces manual investment, and the maintenance workload is far lower than traditional sand filtration equipment.
Q2: Can we customize the water output, material grade and automatic control logic according to the actual salinity of on-site raw water?
A: Yes. Our technical team will match membrane type, pipeline material and pump power according to the customer’s raw water test report, and adjust the backwashing and chemical cleaning program to complete personalized non-standard design.
Q3: How long is the delivery period of standard spot ultrafiltration desalination system and customized modified equipment?
A: Conventional standard equipment corresponding to Fully Automatic Ultrafiltration Equipment for Industrial Water can be delivered within 3–7 working days; customized equipment with structure and parameter adjustment needs 12–30 working days according to the modification scope.
Q4: What pretreatment facilities need to be configured before the water inlet of ultrafiltration desalination system?
A: It is recommended to install coarse filter + multimedia sand filter + security liquid filter at the front end to intercept large particle silt, avoid physical scratch damage to membrane filaments, and reduce the pollution load of ultrafiltration components.
Q5: Which components of the ultrafiltration desalination system are covered by the factory official warranty scope?
A: Stainless steel frame, water pumps, valve bodies, PLC control cabinet and testing instruments enjoy a 1-year global factory warranty; ultrafiltration membrane elements belong to consumable parts and are not included in the warranty scope.
Q6: Can multiple sets of ultrafiltration desalination systems be operated in parallel to expand the overall water processing capacity of the desalination project?
A: Parallel operation is fully supported. Multiple ultrafiltration units are connected to the main water pipeline with unified central automatic control, which is convenient for customers to expand processing capacity in batches with the gradual expansion of project scale.
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