Automatic Ultrafiltration Machine for Unattended Water Treatment Work

Automatic Ultrafiltration Machine for Unattended Water Treatment Work

Automatic ultrafiltration machine is intelligent membrane separation water treatment equipment with full automatic running logic for industrial water purification and wastewater recycling. As an intelligent controlled industrial liquid filter with automatic cleaning and fault alarm functions, this automatic unit can be matched with large-scale Industrial Skid Mounted Ultrafiltration Equipment, standard Integrated Ultrafiltration Water Purification Equipment, anti-fouling core Tubular Ultrafiltration Membrane and consumable Ultrafiltration Membrane Filter to build full-automatic water treatment systems for factories of different scales. This paper systematically elaborates the structural composition, automatic operation mechanism, standardized technical indicators, strict production quality management and multi-industry application scenarios of automatic ultrafiltration machine, helping global industrial buyers select intelligent ultrafiltration equipment to reduce manual operation costs and stabilize long-term water outlet quality.

1. Product Introduction

Automatic ultrafiltration machine is an upgraded intelligent version of traditional manual ultrafiltration devices. The whole machine integrates membrane components, water supply pumps, backwash pipelines, CIP chemical cleaning pipelines, solenoid valve groups and PLC+HMI automatic control system on an integral stainless steel skid frame. All actions such as water inlet, filtration, backwashing, chemical cleaning and drainage are executed automatically by preset programs without manual on-site operation for a long time, which greatly solves the problems of unstable water quality and membrane damage caused by human misoperation in traditional manual ultrafiltration equipment.

Our automatic ultrafiltration machine reserves unified docking interfaces to realize collaborative matching with multiple mainstream products on the official website. For large industrial park centralized sewage treatment projects, users can adopt combined Industrial Skid Mounted Ultrafiltration Equipment composed of multiple sets of automatic ultrafiltration machines to realize large-flow continuous water treatment. For conventional factory production water preparation and medium-volume sewage reuse projects, the integrated molded Integrated Ultrafiltration Water Purification Equipment with built-in automatic control program is the most mainstream matching choice. When the treatment medium is oily wastewater, electroplating wastewater and high-suspended solid waste liquid with serious fouling risks, we will equip anti-blocking Tubular Ultrafiltration Membrane as the core filter material inside the automatic machine to improve the system’s tolerance to complex pollutants. The basic filtering core of all automatic ultrafiltration machines adopts standard universal Ultrafiltration Membrane Filter, which is convenient for customers to purchase replacement filter elements in the later maintenance stage.

The frame body of the automatic ultrafiltration machine is made of 304 stainless steel integrated welding, with strong rust resistance and structural stability, suitable for indoor production workshops, outdoor sewage stations and semi-open water treatment areas. The default membrane material is modified PVDF hollow fiber membrane, which can efficiently intercept suspended solids, colloids, bacteria, viruses and macromolecular organic pollutants in water while retaining beneficial mineral substances in the water body. The built-in PLC intelligent system can automatically adjust backwash frequency according to real-time pressure difference data of the membrane system, send fault reminder alarms for abnormal pressure, flow rate and equipment operation, and record historical operation data for later equipment maintenance analysis.

In the actual water treatment process, automatic ultrafiltration machine is mostly arranged in the front section of reverse osmosis pure water equipment as pretreatment equipment. It stably controls the SDI value of influent water below 3, effectively prevents RO membrane pollution and blockage, reduces the manual maintenance workload of the whole pure water system, and has been widely favored by enterprises in food, pharmaceutical, chemical, printing and dyeing industries.

2. Working Principle

The basic physical separation principle of automatic ultrafiltration machine is pressure-driven cross-flow sieving, and the core difference from ordinary ultrafiltration equipment lies in the whole-process automatic program control of each working link. After raw water is pressurized by the feed pump to the rated working pressure of 1.0–4.0 bar, the fluid flows tangentially along the surface of the internal membrane filter elements at a fixed flow velocity. Water molecules and dissolved small-molecule salts pass through the membrane micropores to form qualified permeate clean water, while particulate pollutants and microorganisms larger than the membrane molecular weight cutoff are intercepted on the membrane surface, and most pollutants are discharged out of the machine with concentrated water under the scouring of cross-flow liquid.

The PLC control program solidifies two automatic maintenance cycles to ensure the long-term stable operation of the machine. First is timing differential pressure linkage automatic backwashing: the system collects the pressure difference data on both sides of the membrane in real time, automatically starts the backwash pump and reversely flushes the membrane surface dirt when the set time or pressure difference threshold is reached, and the whole process does not require human participation. Second is periodic automatic chemical cleaning: the system automatically reminds or automatically starts the CIP cleaning program according to the accumulated running time, uses acid solution to remove inorganic scale and alkaline solution to decompose organic biofilm, and automatically resets the program after the cleaning process is completed. If the machine is equipped with tubular membrane components, the program can also be matched with automatic sponge ball physical cleaning to strengthen the cleaning effect for high-pollution wastewater.

3. Technical Parameters 

3.1 Core Membrane Matching Parameters

1. Conventional membrane material: Modified industrial PVDF; PES membrane is optional for food and pharmaceutical sanitary working conditions

2. Optional MWCO specifications: 30 kDa, 50 kDa, 100 kDa

3. Design operating flux: 25 ~ 85 LMH (adjusted according to raw water pollutant concentration)

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

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

3.2 Overall Operating Parameters of Automatic Ultrafiltration Machine

1. Optimal stable working pressure: 1.5 bar ~ 3.0 bar

2. Comprehensive water recovery rate of the whole machine: 80% ~ 93%

3. Effluent turbidity index: Stably lower than 0.1 NTU

4. Bacteria interception efficiency: ≥99.99%

5. Outlet water SDI value: ≤3, fully meeting the influent standard of reverse osmosis equipment

3.3 Automatic Control & Hardware Configuration Parameters

1. Frame material: 304 stainless steel integrated skid support frame

2. Control system: PLC + touch screen intelligent automatic control, with data recording and fault alarm function

3. Automatic backwash mode: Dual trigger of timing + pressure difference linkage

4. Automatic backwash adjustable period: 15 minutes ~ 60 minutes

5. Recommended automatic chemical cleaning cycle: 2 ~ 6 months

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

4. Product Quality & Manufacturing Standard

Each automatic ultrafiltration machine produced by LEFILIER implements full-process closed-loop quality inspection from raw material incoming inspection to finished product delivery. Before membrane assembly, each batch of membrane filter elements must pass the bubble point integrity test one by one to eliminate defective products such as fiber fracture and membrane pore leakage, ensuring stable pollutant interception performance of the core filter material. Stainless steel frame welding and internal pipeline connection adopt argon arc welding technology, and all water-wetted parts are made of anti-corrosion materials to avoid secondary pollution of water quality.

After the overall assembly is completed, each machine must pass the FAT factory acceptance test: simulate the actual water inlet operating state to test the stability of water production, the response sensitivity of each automatic valve, the execution logic of backwashing and cleaning programs, and the normal triggering of fault alarm functions, and deliver the product only after all indicators are qualified. Our automatic ultrafiltration machine has passed ISO9001 quality system certification, CE safety certification and NSF61 drinking water material certification. Under standardized operation and automatic periodic maintenance, the service life of built-in PVDF membrane components can reach 5–8 years, effectively reducing the long-term manual management cost and membrane replacement cost for enterprises. Each finished machine is equipped with a complete operation manual and quality inspection report for after-sales service traceability.

5. Application Fields

Relying on unattended automatic operation, stable effluent quality and low later management cost, automatic ultrafiltration machine is widely used in various industrial and municipal water treatment scenarios:

1. Factory pure water pretreatment: Automatically remove colloids and microorganisms in raw water to protect downstream reverse osmosis membrane elements

2. Industrial wastewater recycling: Automatic tertiary treatment of factory biochemical wastewater for workshop flushing, cooling water replenishment and green irrigation

3. Municipal surface water purification: Automatic treatment of river water and lake water to prepare factory self-provided production and domestic water

4. Food and beverage production water purification: Automatic purification of dairy, fruit juice and brewing process water to remove microorganisms while retaining natural nutrients

5. Pharmaceutical purified water preparation: Automatic front-end filtration to remove pyrogen and endotoxin for pharmaceutical production water systems

6. Electroplating, printing and dyeing wastewater pretreatment: Match tubular membranes to automatically treat oily wastewater to realize pollutant separation and water reuse

FAQ

Q1: What are the core advantages of automatic ultrafiltration machine compared with ordinary manual ultrafiltration equipment?

A: Automatic ultrafiltration machine relies on PLC program to complete backwashing, cleaning and other work automatically, realizing unattended operation, reducing labor input and human operation errors, and keeping long-term stable effluent quality.

Q2: Can automatic ultrafiltration machine remove dissolved salt and reduce the TDS value of produced water?

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

Q3: How long is the service life of the built-in PVDF membrane in the automatic ultrafiltration machine?

A: With automatic backwashing and regular automatic chemical cleaning, standard PVDF membrane can run stably for 5–8 years. Replace the membrane when the water production flux cannot be restored after complete cleaning or the effluent turbidity rises abnormally.

Q4: Can the automatic program parameters of the automatic ultrafiltration machine be modified according to the actual water quality on site?

A: The touch screen operation interface supports manual modification of backwash time, pressure difference threshold and cleaning cycle parameters, and users can adjust the program logic according to the actual pollution degree of raw water.

Q5: Will the automatic ultrafiltration machine trigger an alarm when abnormal working conditions occur?

A: The system is equipped with multiple monitoring points such as pressure, flow and liquid level. When the equipment is abnormally shut down or the pressure exceeds the limit, the system will send sound and light alarms and record fault data for maintenance personnel to troubleshoot.

Q6: Is professional electrician required for the installation and commissioning of automatic ultrafiltration machine?

A: The factory completes program debugging and pipeline assembly. Customers only need to connect water pipes and power supply on site according to the manual, and ordinary maintenance personnel can complete the installation work without professional electrical engineers

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