(I)Product Overview
Ultrafiltration (UF) equipment is a precision membrane separation device with ultrafiltration membrane as the core. It is driven by pressure and relies on the membrane pore size sieving effect to complete solid-liquid separation. The pore size range of ultrafiltration membrane is 0.01 0.1 μ m, which can effectively intercept colloids, suspended particles, sediment, rust, algae, bacteria, viruses, macromolecular organic matter, colloidal silica, and flocs in water. Water molecules and small molecule salt ions can freely pass through the membrane layer.
(II)Equipment features
1. High precision filtration and long-term protection of reverse osmosis membranes. Through fine physical screening, they accurately intercept impurities such as colloids, suspended solids, and bacteria in water that are prone to clogging, stabilize and reduce the SDI value of incoming water, completely solve the problem of RO membrane clogging and pollution, and build the first protective barrier for the back-end water purification system.
2. Anti pollution and durable, with a long-lasting and stable water flow rate. High quality PVDF hollow fiber membrane is used, which has a large water flow capacity and stable performance. It is also resistant to acid and alkali, oxidation, and oil pollution, and is not easily clogged in the face of complex water quality. After cleaning, the filtration performance can be quickly restored, and the equipment has extremely strong durability.
3. Intelligent automatic cleaning, no need for frequent manual maintenance. Equipped with a fully automatic air-water joint flushing function, it automatically flushes and removes pollutants from the film surface at regular intervals. The entire process is automated, eliminating the need for frequent manual cleaning and maintenance, greatly simplifying daily operation and maintenance work.
4. Modular and scalable, low voltage energy-saving and cost-effective standardized module design, flexible adjustment of water production, no need to replace the entire equipment for later expansion, simply add or remove membrane components; Low pressure operation has low energy consumption, concentrated water can be recycled and reused, with dual advantages of energy and water conservation, and high cost-effectiveness.
5. Clean and anti-corrosion materials, suitable for high-end water purification scenarios, with a full process of clean and anti-corrosion water wading materials. There is no rust or harmful substance precipitation, and it will not cause secondary pollution of water quality. It can meet the high standard clean water treatment needs of pure water, food, medicine, and other industries.
6. Multiple safety protections, equipped with intelligent interlocking protection for liquid level, pressure, and water quality for 24-hour unmanned operation, automatic alarm and shutdown protection for abnormal situations, safe and stable equipment operation, and the ability to achieve 24/7 unmanned continuous operation.
7. Reduce backend operation and maintenance pressure, save long-term expenses, stabilize and optimize inlet water quality, strictly control SDI indicators, significantly reduce the workload of reverse osmosis membranes, reduce membrane fouling, scaling and cleaning frequency, effectively extend the service life of backend equipment and membrane components, and save long-term operation and consumable costs.
(III)System composition
The entire ultrafiltration system is divided into six parts: raw water supply unit, ultrafiltration host membrane components, air-water flushing unit, chemical cleaning unit, automatic monitoring unit, and concentrated water collection unit
1. Raw water supply pretreatment unit
Raw water tank/intermediate water tank: Cache incoming water, balance water quantity and quality;
Boosting the booster pump: providing stable operating pressure for the ultrafiltration system;
Pre bag/precision filter: intercepts hair, large particles of sediment, and fibers to prevent scratching of ultrafiltration membrane fibers.
2. Core unit of ultrafiltration host
Ultrafiltration membrane module (hollow fiber PVDF membrane): core filtration element, divided into two streams: produced water and concentrated water;
Membrane shell and membrane frame: fixed membrane components, pressure sealed;
Main water production pipeline and concentrated water circulation pipeline: achieve cross flow filtration and concentrated water reflux circulation.
3. Gas water combined flushing unit (key to anti clogging)
Aeration fan/air pump: provides compressed air to clean the surface pollutants of membrane fibers;
Flush electric valves and backwash pipelines: achieve forward flushing and reverse water production flushing;
Cleaning water tank: Store produced water for automatic membrane flushing.
4. Chemical cleaning dosing unit (optional)
Two sets of medicine washing boxes: equipped with sodium hypochlorite (for sterilizing and removing organic matter) and acid-base cleaning solution (for removing inorganic colloidal scale) respectively;
Cleaning circulation pump: offline chemical circulation cleaning to restore membrane flux;
Measurement and dosing device: daily maintenance of adding small amounts of antibacterial agents to inhibit the growth of bacteria and algae on the membrane surface.
5. Online monitoring and self-control unit
Online turbidity meter and SDI detector: monitor the cleanliness of ultrafiltration produced water;
Pressure transmitter and flow sensor: monitor the pressure and flow of incoming water, produced water, and concentrated water;
PLC touch screen control cabinet: automatic operation, timed air/water washing, automatic drug washing program, fault sound and light alarm;
Electric switching valve: If the water quality does not meet the standard, it will automatically flow back to the front water tank for re filtration.
6. Water production and concentrated water collection unit
Ultrafiltration water tank: stores filtered clean water and supplies it to secondary RO/EDI;
Concentrated water reflux pipeline: Most of the concentrated water flows back to the original water tank for circulating filtration, with a small amount of discharge;
Transport pump: Transport the ultrafiltration produced water to the back-end reverse osmosis system.
