Ultrafiltration of Water Purification Equipment for Industrial Water Solutions

Ultrafiltration of Water Purification Equipment for Industrial Water Solutions

Ultrafiltration of water purification equipment is a mature membrane separation device that removes suspended pollutants to purify raw water for industrial production and municipal water supply scenarios. As a stable, high-efficiency industrial liquid filter relying on physical sieving effect, this water purification system can be matched with large-scale modular Industrial Skid Mounted Ultrafiltration Equipment, anti-fouling core Tubular Ultrafiltration Membrane, plug-and-play finished Integrated Ultrafiltration Water Purification Equipment and replaceable consumable Ultrafiltration Membrane Filter to build customized water treatment schemes for diverse water quality and water yield demands. This paper systematically analyzes structural composition, pressure-driven separation principle, unified technical indicators, strict factory quality management system and multi-industry practical application scenarios of ultrafiltration water purification equipment, helping global buyers select appropriate ultrafiltration purification products to optimize factory water supply stability and reduce wastewater discharge costs.

1. Product Introduction

Ultrafiltration of water purification equipment takes ultrafiltration membrane components as the core functional medium, integrating feed pumps, backwash pipeline assemblies, chemical CIP cleaning units, pressure monitoring gauges and PLC intelligent control cabinet on an integral stainless steel skid frame, completing the whole process of raw water purification through physical interception without adding excessive chemical agents. Different from traditional sedimentation and activated carbon filtration processes, ultrafiltration water purification equipment forms an absolute physical barrier to intercept colloids, bacteria, suspended solids and macromolecular organics, while retaining beneficial mineral ions inside water bodies, which is the mainstream pretreatment equipment for modern pure water preparation and industrial wastewater recycling.

LEFILIER’s serial ultrafiltration water purification products cover multiple mature models displayed on the official website to meet differentiated project requirements. For large industrial parks, centralized sewage treatment stations and high-flow continuous water purification projects, users can choose the parallel combined Industrial Skid Mounted Ultrafiltration Equipment to realize expandable water production capacity and long-term stable large-volume water supply. For medium and small factories with limited installation space and tight project construction cycles, the factory pre-assembled and debugged Integrated Ultrafiltration Water Purification Equipment realizes one-step field installation only by connecting pipelines and power supply, greatly saving civil engineering and construction costs. When processing oily wastewater, electroplating wastewater, coating wastewater and high-solids waste liquid prone to serious membrane fouling, we adopt open runner anti-blocking Tubular Ultrafiltration Membrane as the core filter material inside the purification equipment to strengthen the system’s tolerance to high-concentration pollutants. The basic filtering core of all ultrafiltration water purification equipment adopts universal standard Ultrafiltration Membrane Filter, realizing unified spare parts specifications and lowering the later maintenance threshold for enterprise users.

The frame body of all ultrafiltration water purification equipment is welded with 304 stainless steel as standard configuration, featuring rust resistance and structural stability, adapting to indoor workshops, outdoor sewage stations and semi-open water treatment areas. Modified PVDF is selected as the mainstream membrane material, with excellent acid-base resistance, oxidation resistance and mechanical tensile strength. The built-in PLC system supports dual-trigger automatic backwashing of timing + pressure difference, automatically flushing pollutants attached to the membrane surface; a reserved chemical cleaning interface can remove inorganic scale and organic biofilm regularly to restore the initial water production flux of membrane elements.

In actual water treatment technological layout, ultrafiltration water purification equipment is mostly arranged at the front end of reverse osmosis systems, stably controlling the SDI value of influent water below 3 to prevent RO membrane contamination and clogging, and has been widely recognized by customers in food, pharmaceutical, chemical, printing and dyeing industries worldwide.

2. Working Principle

The core operating logic of ultrafiltration of water purification equipment is pressure-driven cross-flow physical sieving separation. After raw water is pressurized by the built-in feed pump to a stable operating pressure of 1.0 bar ~ 4.0 bar, water fluid flows tangentially along the surface or inner wall of the internal ultrafiltration membrane filter elements at a fixed flow velocity.

Water molecules and dissolved low-molecular inorganic salts pass through the micropores on the membrane selective layer under pressure to form qualified clean permeate water, which is collected and delivered to the clean water storage tank via the water production pipeline. Pollutants including suspended particles, colloidal flocs, microbial colonies and organic macromolecules larger than the membrane molecular weight cutoff are trapped on the membrane surface. The high-speed tangential cross-flow continuously scours the membrane surface, carrying most intercepted pollutants out of the equipment along with concentrated drainage, slowing down the deposition rate of dirt and maintaining stable water production efficiency for a long time.

Two sets of automatic maintenance mechanisms are solidified in the control program of ultrafiltration water purification equipment to guarantee long-term stable operation. First is regular automatic backwashing: the equipment uses self-produced clean water to reversely permeate the membrane layer and peel off loose surface dirt, running fully automatically without manual daily supervision. Second is periodic CIP chemical cleaning: acid detergent removes inorganic scale sediments, while alkaline liquid decomposes organic pollutants and biological film when backwashing cannot restore the rated water yield of the equipment. If the purification equipment is equipped with tubular membrane components, online sponge ball physical cleaning can be added as an auxiliary cleaning method to cope with harsh high-fouling wastewater working conditions.

3. Technical Parameters

3.1 Core Ultrafiltration Membrane Matching Parameters

Standard membrane material: Modified industrial PVDF; food-grade PES is optional for pharmaceutical and beverage sanitary scenarios

Optional MWCO grades: 30 kDa, 50 kDa, 100 kDa

Effective membrane pore diameter range: 0.01 μm ~ 0.1 μm

Allowable continuous operating temperature: 5℃ ~ 45℃

pH adaptability range: Continuous operation pH 2–11; short-term cleaning tolerance pH 1–13

Standard design flux range: 20 ~ 85 LMH (adjusted according to raw water pollution load)

3.2 Overall Operating Indicators of Ultrafiltration Water Purification Equipment

Optimal stable working pressure: 1.5 bar ~ 3.0 bar

Comprehensive water recovery rate of the whole system: 82% ~ 93%

Effluent turbidity index: Permanently lower than 0.1 NTU

Bacteria and coliform interception efficiency: ≥99.99%

Outlet water SDI value: ≤3, fully meets the inlet water standard of reverse osmosis equipment

3.3 Equipment Hardware Configuration Parameters

Frame material: 304 stainless steel integrated skid support frame

Control system: PLC + touch screen intelligent 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 determined by actual inlet water pollution level

Customizable water production tonnage: 1T/h, 5T/h, 15T/h, 50T/h, 100T/h mainstream standard models

4. Product Quality & Manufacturing Standards

Every set of ultrafiltration water purification equipment manufactured by LEFILIER implements full-process closed-loop quality inspection from raw material incoming inspection to finished product delivery. Before membrane assembly, each batch of hollow fiber and tubular membrane elements must pass 100% bubble point integrity testing to screen out defective products such as fiber fracture and membrane pore leakage, ensuring stable pollutant interception performance of core filter materials.

Stainless steel frame welding and internal pipeline connection adopt professional argon arc welding technology; all water-wetted contact components adopt anti-corrosion harmless materials to avoid secondary pollution to purified water quality. After overall assembly is completed, each finished equipment must pass FAT factory acceptance testing before delivery: simulate real water inlet working conditions to test water yield stability, pressure difference fluctuation, valve action response and automatic program execution logic, and deliver goods only after all test indicators are fully qualified.

Our ultrafiltration water purification equipment series has obtained ISO9001 quality management system certification, CE EU safety certification and NSF61 drinking water material safety certification. Under standardized operation and regular cleaning maintenance, the service life of built-in PVDF hollow fiber membrane is 5–8 years, and tubular membrane can reach 6–8 years, effectively reducing long-term spare parts replacement and equipment maintenance costs for enterprise users. Each finished product is equipped with a complete operation manual and quality inspection report for production batch traceability and global after-sales technical support.

5. Application Fields

Benefiting from integrated installation, unattended automatic operation and stable effluent quality, ultrafiltration water purification equipment is widely applied in multiple industrial and municipal water treatment fields:

Factory pure water pretreatment: Remove colloids and microorganisms in raw water to protect downstream reverse osmosis membrane elements and extend 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, lake water and reservoir water to prepare factory self-supplied production water and domestic domestic water

Food and beverage processing water purification: Purify brewing, dairy and fruit juice production 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 system

Electroplating, printing and dyeing, petrochemical wastewater treatment: Cooperate with tubular ultrafiltration membrane to separate oily pollutants and suspended solids to realize wastewater standard discharge and water resource reuse

FAQ 

Q1: What is the essential difference between hollow fiber and tubular ultrafiltration water purification equipment?

A: Hollow fiber ultrafiltration equipment has large membrane area per unit volume and low overall cost, suitable for clean raw water and general low-pollution conventional sewage treatment; tubular ultrafiltration equipment has open flow channels, strong anti-blocking performance and supports physical sponge ball cleaning, specially applied for oily wastewater and high suspended solids industrial wastewater treatment.

Q2: Can ultrafiltration water purification equipment remove dissolved salt substances and reduce the TDS value of water?

A: Ultrafiltration only intercepts particulate pollutants and microorganisms, dissolved salt ions can freely pass through membrane micropores. If desalination treatment is required, this purification equipment must be used as pretreatment matched with reverse osmosis membrane system.

Q3: How often does ultrafiltration water purification equipment need chemical cleaning during normal operation?

A: Automatic backwash runs every 15–60 minutes daily without adding chemical agents; regular CIP chemical cleaning is carried out every 2–6 months according to inlet water pollution degree to eliminate organic biofilm and inorganic scale attached to the membrane surface.

Q4: What improper operations will cause irreversible damage to the internal membrane of ultrafiltration purification equipment?

A: Long-term neglect of membrane cleaning, excessive operating pressure, over-temperature inlet water and direct contact of membrane materials with high-concentration strong acid and alkali will cause permanent membrane fouling or material damage, seriously shortening the service life of membrane elements.

Q5: Can existing ordinary ultrafiltration equipment be directly refitted into tubular membrane type purification equipment?

A: Direct replacement and refitting are not recommended. Tubular membrane needs supporting circulating pipelines and special sponge ball cleaning components. It is more reliable to purchase matched complete purification equipment according to actual water volume and water quality parameters.

Q6: Why is modified PVDF the most mainstream membrane material for ultrafiltration water purification equipment?

A: PVDF material has outstanding acid and alkali resistance, oxidation resistance, mechanical tensile strength and anti-fouling performance. It can maintain stable filtering performance after repeated chemical cleaning, and its adaptability to complex industrial water environments is far superior to PP and PES materials.

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