Premium Ultrafiltration Device for All Industrial Water Treatment Needs-XINXIANG LIFEIERTE FILTER CORP. LTD

Premium Ultrafiltration Device for All Industrial Water Treatment Needs

Ultrafiltration device is a classic pressure-driven membrane separation device widely adopted for raw water purification, wastewater recycling and material separation across global industrial sectors. As a multi-specification configurable industrial liquid filter with diversified structural designs and interception precision grades, our product portfolio includes high-load pollutant treatment Concentrated Ultrafiltration Membrane Equipment, high-precision graded filtration Dual Stage Ultrafiltration Equipment, space-saving mini Compact Small Scale Ultrafiltration Membrane Equipment and factory pre-assembled integrated Complete Ultrafiltration Equipment to match different water quality conditions, water output demands and site layout limitations. This paper systematically elaborates the structural composition, cross-flow sieving working mechanism, unified industrial technical indicators, strict factory quality supervision system and cross-industry practical application scenarios of ultrafiltration devices, guiding global industrial users to grasp device performance and realize stable, low-cost water treatment operation.

1. Product Introduction of Ultrafiltration Device

An ultrafiltration device takes ultrafiltration membrane components as the core functional core, matched with feed pump set, backwash pipeline system, chemical online cleaning unit, pressure monitoring components and PLC intelligent control cabinet to form a complete physical impurity removal system. It relies on the micropore sieving effect of the membrane to intercept colloids, suspended solids, microorganisms and macromolecular organics in water while retaining beneficial mineral ions, which is the most mainstream pretreatment equipment for reverse osmosis ultrapure water preparation lines at present.

LEFILIER’s serial ultrafiltration devices realize full-scenario coverage through differentiated product design displayed on the official website. For projects involving wastewater concentration, useful component recovery and high organic sewage treatment, users can select Concentrated Ultrafiltration Membrane Equipment; this device optimizes the internal flow channel of the membrane element to enhance anti-fouling performance and adapt to long-term high-pollution operating environments. For pharmaceutical production water, electronic ultrapure water and high-grade beverage process water with strict outlet cleanliness requirements, Dual Stage Ultrafiltration Equipment adopts two-stage serial graded interception: the primary stage removes most large-particle pollutants, and the secondary stage performs deep fine filtration to effectively reduce the pollution burden of subsequent reverse osmosis membranes. For laboratory water supply, small food workshops and temporary mobile water treatment stations with low water consumption, the compact Compact Small Scale Ultrafiltration Membrane Equipment features small floor area and quick on-site installation and commissioning. For new construction and upgrading of factory overall water stations that pursue one-stop delivery, the fully assembled and tested Complete Ultrafiltration Equipment can effectively shorten project construction periods.

The frame of all ultrafiltration devices uses 304 stainless steel as the standard material, and modified PVDF is the mainstream membrane material with excellent acid-base resistance and oxidation resistance. The built-in PLC system supports timing + pressure difference dual-trigger automatic backwashing to automatically clean pollutants attached to the membrane surface; the reserved CIP cleaning interface can regularly eliminate inorganic scale and organic biofilm to restore the initial water production flux of membrane elements. In actual technological layout, ultrafiltration devices are mostly arranged at the front end of RO systems, stably controlling the SDI value of influent water below 3 to avoid frequent fouling and blockage of reverse osmosis membrane elements.

2. Working Principle of Ultrafiltration Device

The universal core working principle of all types of ultrafiltration devices is pressure-driven cross-flow physical sieving separation. After raw water is pressurized by the supporting feed pump to a stable operating pressure of 1.0 bar ~ 4.0 bar, the fluid flows tangentially along the surface of hollow fiber membrane filaments or spiral roll membrane sheets at a fixed flow velocity.

Under the pressure difference on both sides of the membrane layer, water molecules and dissolved small-molecule inorganic ions pass through the selective micropores of the membrane to form qualified clean permeate water, which is collected and transported to the clean water tank through the produced water pipeline. Substances with particle size or molecular weight larger than the membrane molecular weight cutoff (MWCO) are trapped on the membrane surface. High-speed cross-flow fluid continuously scours the membrane surface, carrying most intercepted pollutants out of the device with concentrated drainage, slowing down the deposition rate of dirt and preventing the formation of dense filter cake blocking membrane pores.

Two sets of automatic maintenance logic are embedded in the control program of each ultrafiltration device. The first is automatic backwashing, which uses self-produced clean water to reversely flush the membrane layer to peel off loose surface dirt and operates automatically without daily manual supervision. The second is periodic chemical cleaning: alkaline liquid decomposes organic biofouling, and acidic liquid removes inorganic scale when the overall flux of the system decays obviously. For concentrated ultrafiltration devices applied in severe pollution working conditions, enhanced circulating cleaning programs will be configured during production.

3. Technical Parameters (No hyperlinks inside this whole section)

3.1 Core Ultrafiltration Membrane Matching Parameters

Optional membrane materials: Modified industrial PVDF (universal industrial), food-grade PES (pharmacy & beverage sanitary level)
Common optional MWCO grades: 30 kDa, 50 kDa, 100 kDa
Effective membrane pore size range: 0.01 μm ~ 0.1 μm
Allowable continuous operating temperature: 5℃ ~ 45℃
pH tolerance range: Continuous operation pH 2–11; short cleaning tolerance pH 1–13
Design operating flux: 20 ~ 85 LMH (low flux design is adopted for high-turbidity raw water to extend membrane service life)

3.2 Overall Operating Indicators of Ultrafiltration Device

Optimal stable working pressure: 1.5 bar ~ 3.0 bar
Whole system water recovery rate: 82% ~ 93%
Effluent turbidity index: Permanently less than 0.1 NTU
Interception efficiency of bacteria and coliforms ≥99.99%
Outlet water SDI ≤3, fully meeting the inlet water standard of reverse osmosis equipment

3.3 Device Hardware Configuration Parameters

Frame material: Standard 304 stainless steel, 316L stainless steel customized for corrosive wastewater
Control system: PLC + touch screen automatic control, with fault alarm and operation data recording function
Adjustable automatic backwash cycle: 15 minutes ~ 60 minutes
Recommended chemical cleaning cycle: 2 ~ 6 months
Customizable water production tonnage: Full specifications from 0.3T/h to 200T/h

4. Product Quality & Manufacturing Standards

All ultrafiltration devices produced by LEFILIER implement full-process closed-loop quality control from raw material procurement, membrane production, component processing to finished machine assembly and factory delivery inspection. Each batch of membrane elements must pass a 100% bubble point integrity test to eliminate defective products such as fiber fracture and membrane leakage, ensuring stable pollutant interception performance of core filter materials. Stainless steel frame welding adopts precision argon arc welding technology, and all water-wetted accessories are harmless anti-corrosion materials to avoid secondary pollution to purified water quality.

Before delivery of each finished ultrafiltration device, a FAT factory acceptance test must be completed by simulating actual water inlet working conditions to detect water yield stability, pressure difference fluctuation, valve action response and automatic program execution logic. Products can only be delivered together with formal factory inspection reports after all test items are qualified.

Our ultrafiltration devices have obtained ISO9001 quality management system certification, CE EU safety certification and NSF61 drinking water material safety certification. Under standardized operation and regular maintenance, the service life of PVDF hollow fiber membrane is 5–8 years, and tubular membrane can reach 6–8 years. We provide long-term global supply of original spare parts and free remote video technical guidance for all customers purchasing our ultrafiltration devices.

5. Application Fields of Ultrafiltration Device

Relying on stable physical interception performance and low daily operating cost, ultrafiltration devices are widely applied in multiple industrial water treatment scenarios worldwide:

Factory pure water pretreatment: Remove colloids and microorganisms to protect downstream reverse osmosis membrane components and prolong RO service life
Industrial wastewater recycling: Tertiary advanced treatment of factory biochemical wastewater for workshop flushing, cooling water replenishment and green landscape irrigation
Municipal surface water purification: Treat river water and reservoir raw water to prepare factory self-supplied production water and domestic water
Food and beverage processing water purification: Purify brewing, dairy and fruit juice process water to remove microorganisms while retaining natural nutrients in water
Pharmaceutical purified water preparation: Remove pyrogen and endotoxin as the core filtering unit of pharmaceutical production water systems
Electroplating, printing and dyeing wastewater treatment: Cooperate with concentrated ultrafiltration devices to separate oily pollutants to realize standard wastewater discharge and water resource reuse

FAQ

Q1: What is the difference between ultrafiltration device and reverse osmosis device?

A: Ultrafiltration devices only intercept colloids, macromolecules and microorganisms and cannot remove dissolved salt ions; reverse osmosis membranes can intercept soluble salts to realize desalination. Ultrafiltration is mostly used for pretreatment, while RO is used for deep desalination and ultrapure water preparation.

Q2: Can ultrafiltration device reduce the TDS value of water body?

A: Ultrafiltration cannot trap dissolved salt ions, so the TDS value of water will not change obviously after treatment. If desalination is required, the ultrafiltration device must be matched with reverse osmosis equipment for combined use.

Q3: How long is the service life of the PVDF membrane inside the ultrafiltration device?

A: With regular automatic backwashing and periodic chemical cleaning maintenance, the service life of conventional PVDF hollow fiber ultrafiltration membrane is 5 to 8 years.

Q4: What failures will be caused by long-term failure to clean the ultrafiltration device?

A: Pollutants will continuously accumulate on the membrane surface to form a compact filter cake layer, leading to sharp attenuation of equipment water output flux. Long-term severe fouling will cause irreversible damage to the membrane and lead to membrane scrapping in advance.

Q5: Is the control program of dual-stage ultrafiltration device different from ordinary single-stage ultrafiltration equipment?

A: Yes. The primary membrane of the dual-stage device bears a higher pollution load with a shorter backwash cycle, while the secondary fine filtration membrane has a lower pollution load with a longer maintenance cycle, and the two groups of membranes operate with independent control logic.

Q6: What pretreatment equipment needs to be installed at the water inlet of the ultrafiltration device?

A: It is necessary to install multimedia filter + 5μm security filter at the front end to intercept large particle impurities such as silt and rust slag, preventing hard particles from scratching the membrane surface and causing filament breakage damage.

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