Ultrafiltration Small Equipment for Small-Scale Industrial Water Treatment

Ultrafiltration Small Equipment for Small-Scale Industrial Water Treatment

Ultrafiltration small equipment is compact, skid-mounted water purification gear customized for small factories, laboratories and small-volume water treatment demands. As a space-saving modular liquid filter with simplified structure and stable filtering performance, this mini device can be matched with standardized Integrated Ultrafiltration Water Purification Equipment, mature Ultrafiltration Machine, core consumable Ultrafiltration Membrane Filter and large-scale Industrial Skid Mounted Ultrafiltration Equipment to form gradient water treatment solutions for different water production volumes. This paper comprehensively introduces structural composition, membrane separation operating theory, unified technical indicators, strict factory quality inspection standards and targeted application scenarios of ultrafiltration small equipment, guiding global small enterprise purchasers to select appropriate mini ultrafiltration devices according to on-site space and actual water consumption.

1. Product Introduction

Ultrafiltration small equipment belongs to the miniaturized branch of complete ultrafiltration water treatment systems, which condenses membrane modules, feed booster pumps, automatic backwash pipelines, simple chemical cleaning interfaces and mini PLC control box into a compact small stainless steel frame. Compared with large-sized industrial ultrafiltration systems, ultrafiltration small equipment features small floor area, plug-and-play installation, low operation difficulty and low overall investment cost, perfectly solving the water purification and wastewater recovery problems of small processing workshops, laboratory water supply, commercial water stations and individual production lines.

Our company’s small ultrafiltration equipment is designed based on the mature technology of large water treatment products. Users who need to expand water production capacity in the later stage can directly upgrade to standard Integrated Ultrafiltration Water Purification Equipment or complete Ultrafiltration Machine without changing the original water pipeline layout. The internal core filter medium of all small ultrafiltration devices adopts standard Ultrafiltration Membrane Filter with universal specifications; users can purchase replacement membrane elements conveniently through our supporting spare parts supply system. For enterprises with future large-scale transformation plans, the whole pipeline design of small ultrafiltration equipment is consistent with large Industrial Skid Mounted Ultrafiltration Equipment, realizing seamless system iteration and upgrade.

The frame of ultrafiltration small equipment adopts lightweight 304 stainless steel welding structure, which is rust-proof and easy to move. The internal default filter material is modified PVDF hollow fiber membrane filter element, which can effectively intercept suspended solids, colloids, bacteria and macromolecular organic impurities in raw water while retaining natural mineral substances in water. The control system adopts simplified intelligent PLC program, automatically completes regular backwashing to clean membrane surface dirt, and reserves manual chemical cleaning ports for periodic membrane maintenance. The overall pipeline layout is highly integrated, the number of external connecting pipes is reduced to the minimum, and non-professional operators can complete daily startup and shutdown operations simply according to the operation manual.

In actual industrial matching, ultrafiltration small equipment is mostly used as the pretreatment front end of small reverse osmosis pure water machines. It effectively reduces the SDI value of raw water, protects the subsequent RO membrane elements from contamination and clogging, and greatly reduces the maintenance frequency of small pure water preparation systems for small enterprises.

2. Working Principle

The filtration principle of ultrafiltration small equipment follows the pressure-driven cross-flow physical sieving mechanism same as large industrial ultrafiltration equipment. After raw water is pressurized by the built-in small feed pump to 1.0–3.5 bar working pressure, the water flows tangentially along the outer wall of the built-in hollow fiber membrane filter elements inside the small frame.

Water molecules and dissolved low-molecular inorganic salts pass through the micropores of the membrane wall smoothly to form clean permeate water and flow into the clean water tank. Pollutant particles, colloidal agglomerates, microbial colonies and organic macromolecules larger than the membrane molecular weight cutoff are intercepted on the outer surface of the membrane fibers. The tangential flow of raw water continuously scours the membrane surface, takes away most intercepted dirt with concentrated drainage, and avoids rapid membrane pore blockage caused by dirt accumulation.

Two maintenance modes are built into the control program of ultrafiltration small equipment to ensure long-term stable water output. First is automatic timing backwashing: the device uses self-produced clean water to reversely flush the membrane layer at a set frequency to peel off loose surface pollutants, and the whole process runs automatically without manual supervision. Second is manual periodic CIP chemical cleaning: when the water yield of the small equipment decreases obviously after long-term operation, users can inject dilute acid and alkali cleaning agents through the reserved cleaning interface to dissolve inorganic scale and organic biological film on the membrane surface, so as to restore the original design flux of the membrane filter element. Due to the low pollution load of the applicable working conditions of small ultrafiltration equipment, the cleaning cycle is longer than that of large industrial sewage treatment equipment, which further reduces the daily operation workload of users.

3. Technical Parameters (No hyperlinks in this entire paragraph)

3.1 Core Membrane Filter Parameters

1. Membrane material: Modified PVDF hollow fiber membrane (standard configuration)

2. Optional MWCO: 50 kDa / 100 kDa conventional specifications

3. Effective membrane pore size: 0.01 ~ 0.1 μm

4. Allowable operating temperature: 5℃ ~ 45℃ continuous operation

5. pH tolerance range: Continuous running pH 2–11; cleaning pH 1–13 short-term tolerance

6. Design flux range: 30 ~ 70 LMH

3.2 Whole Small Equipment Operating Parameters

1. Optimal working pressure: 1.2 ~ 2.5 bar

2. System water recovery rate: 83% ~ 92%

3. Effluent turbidity: Stably less than 0.1 NTU

4. Bacteria removal rate: ≥99.99%

5. Outlet water SDI ≤3, meeting the pretreatment standard of small reverse osmosis equipment

3.3 Equipment Hardware Configuration Parameters

1. Frame material: Lightweight 304 stainless steel integrated skid

2. Control mode: Mini PLC + simple button operation panel

3. Automatic backwash cycle: Adjustable from 20 min to 60 min

4. Suggested chemical cleaning cycle: 3 ~ 6 months

5. Conventional customized water yield: 0.5T/h, 1T/h, 2T/h, 3T/h mainstream small tonnage models

4. Product Quality & Manufacturing Standards

Every set of ultrafiltration small equipment produced by LEFILIER implements strict quality inspection during processing and assembly. Before membrane loading, each batch of Ultrafiltration Membrane Filter must pass bubble point leakage test one by one to eliminate defective products such as fiber fracture and membrane pore damage. All water-contacting pipelines and joints are made of food-grade anti-corrosion materials to prevent secondary pollution of effluent water quality.

After the overall assembly of ultrafiltration small equipment is completed, each unit will complete factory water passing test before delivery, simulate actual water intake conditions to verify water yield stability, pressure difference changes and automatic backwash action logic, and deliver the finished product together with quality inspection report only after all test items are qualified. Our small ultrafiltration equipment has passed ISO9001 quality system certification and CE safety certification, with stable product consistency. Under standardized operation and regular maintenance, the service life of built-in PVDF membrane elements can reach 5–7 years, effectively controlling the water treatment operation cost for small factories and individual workshops. All finished products are equipped with detailed operation manuals and after-sales service guarantee documents to solve users’ daily operation and maintenance problems in a timely manner.

5. Application Fields

Relying on small footprint, easy installation and low operation cost, ultrafiltration small equipment is widely used in scattered small-scale water treatment scenarios:

1. Small factory pure water pretreatment: Support small beverage workshops, cosmetic processing plants to purify raw water and protect small RO water making equipment

2. Laboratory water supply purification: Provide qualified clean water for chemical laboratories, biological laboratories and testing institutions

3. Small industrial wastewater recycling: Treat low-concentration cleaning wastewater of small workshops for equipment flushing and ground cleaning reuse

4. Small commercial water purification: On-site water filtration for small supermarkets, office buildings and small catering centralized water supply

5. Small farm & breeding water treatment: Purify well water and river water for livestock drinking water and breeding wastewater simple treatment

6. Mini printing and electroplating workshop wastewater pre-filtering: Remove suspended impurities to reduce the treatment pressure of subsequent simple sewage facilities

FAQ 

Q1: What is the biggest difference between ultrafiltration small equipment and large industrial ultrafiltration systems?

A: Small ultrafiltration equipment is small in size, low in water production, simple in operation and low in investment cost, suitable for small workshops and laboratories; large industrial equipment is high in water yield, complete in supporting functions, and used for centralized water treatment of large factories and industrial parks.

Q2: Can ultrafiltration small equipment remove salt ions and reduce the TDS value of water?

A: Small ultrafiltration equipment only intercepts particles, colloids and microorganisms, dissolved salt ions can freely pass through the membrane. If desalination is needed, it must be matched with small reverse osmosis equipment for combined use.

Q3: How long is the service life of the built-in membrane inside ultrafiltration small equipment?

A: With normal automatic backwashing and regular chemical cleaning, standard PVDF membrane can work stably for 5–7 years. Replace the membrane when the water volume cannot be restored after complete cleaning.

Q4: Is ultrafiltration small equipment movable and suitable for temporary water use scenarios?

A: The whole machine adopts an integrated small skid structure with light weight. Users can move the equipment freely according to the site layout, which is very suitable for temporary production water supply and mobile laboratory water preparation.

Q5: Does ultrafiltration small equipment need professional technicians for installation and debugging?

A: The factory completes pre-assembly and debugging. Users only need to connect water pipes and power supply on site according to the manual, and ordinary staff can complete the whole installation work without professional engineers.

Q6: What will happen if ultrafiltration small equipment is not cleaned for a long time?

A: Dirt and biofilm will accumulate on the membrane surface, resulting in reduced water output, increased operating pressure difference and deteriorated water quality. Serious long-term fouling will cause irreversible damage to the membrane filter element and require early replacement.

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