산업 생산, 수처리, 생체의학 등 수많은 산업 분야에서, 핵심 요소인 한외여과막을 갖춘 한외여과 장치는 압력 구동형 분리 도구로서의 역할을 수행합니다. 이 장치는 고분자 및 콜로이드 입자를 정밀하게 포집하는 동시에 소분자와 용매는 원활하게 통과시킴으로써, 생산 정제 및 수처리 등의 공정에 있어 효율적이고 친환경적인 솔루션을 제공합니다.
How does an ultrafiltration unit work?
Ultrafiltration machine utilizes an ultrafiltration membrane as the primary separation medium. Under external pressure, the material to be treated flows through the surface of the ultrafiltration membrane. The membrane retains large molecules with diameters exceeding its pore size—such as proteins, polysaccharides, colloidal particles, and suspended solids—on its surface, forming a concentrate. Small molecules, such as water molecules and inorganic salts, can pass through the membrane’s micropores, forming the permeate, thus achieving material separation and purification.
Compared to traditional filtration technologies, ultrafiltration unit operates at a more moderate pressure, typically between 0.1 and 0.5 MPa, eliminating the need for extreme conditions such as high temperature and high pressure. This not only prevents the target substance from altering its properties due to extreme environments. But also reduce the equipment’s energy consumption.
What is an ultrafiltration membrane?
Ultrafiltration membranes are pressure-driven membrane separation materials with a uniform and controllable microporous structure. They not only retain large molecules in water or materials but also allow small organic molecules to pass through.
The asymmetric structural design of ultrafiltration membranes ensures separation efficiency while reducing the accumulation of contaminants on the membrane surface, thereby extending the membrane’s lifespan.
What are the components of an ultrafiltration unit?
완전한 ultrafiltration device consists of multiple key components working together, and its core components mainly include the following categories:
Ultrafiltration Membrane Modules:
Based on their structure, they can be divided into four types: hollow fiber, spiral wound, tubular, and plate. Enterprises often use hollow fiber ultrafiltration membrane modules in large – scale water treatment and industrial separation applications, as these modules boast advantages like large membrane area per unit volume, compact structure, and low cost.
Pressure and Delivery System:
주로 가압 펌프, 배관 및 밸브로 구성된 이 시스템은 물질의 흐름과 막 분리 공정에 필요한 안정적인 압력을 공급하는 역할을 담당합니다. 가압 펌프를 선정할 때는 장비의 처리량과 막 모듈의 압력 요구 사항을 기준으로 삼아야 하며, 이를 통해 물질이 한외여과막을 안정적인 유량으로 통과하도록 보장하고 분리 효율에 악영향을 미칠 수 있는 압력 변동을 방지해야 합니다.
Cleaning and Regeneration System:
After prolonged operation, contaminants accumulate on the membrane surface, leading to a decrease in membrane flux. The cleaning system removes contaminants from the membrane surface and restores the membrane’s separation performance through a combination of chemical cleaning (such as acid and alkali solutions, oxidants, etc.) and physical cleaning (such as backwashing, air washing).
Control System:
Modern ultrafiltration unit is generally equipped with an automated control system. These systems utilize sensors to monitor key parameters such as feed flow, pressure, and temperature in real time, and automatically adjust the equipment’s operating status.
For example, when the membrane flux drops to a preset critical value, the system automatically triggers a cleaning procedure. If the sensor of the equipment detects abnormal pressure, the equipment will issue an alarm and stop operating, ensuring the safety and stability of the device.
Ultrafiltration unit is widely used in the following fields
Water Treatment:
- In drinking water purification, ultrafiltration unit effectively removes bacteria, viruses, algae, and suspended solids from water. And it replaces traditional sedimentation tanks and sand filters, and eliminating the need for disinfectants.
- In industrial wastewater treatment, it can pre-treat and deeply treat wastewater from industries. Such as printing and dyeing, chemicals, and electroplating, retaining large molecular pollutants and heavy metals.
Food and Beverage Industry:
- In dairy processing, ultrafiltration eunit separates casein and whey protein from milk, improving the purity and value of dairy products.
- In fruit juice production, it removes impurities such as pectin and cellulose. Thus it will improve the clarity and stability of the juice while retaining nutrients and flavor components.
- In the brewing industry, breweries use an ultrafiltration system for the clarification filtration of wine and beer. Then it reduces sedimentation and extending the product’s shelf life.
Biomedical Field:
- Ultrafiltration machine is suitable for the separation and purification of biological products such as antibiotics, vaccines, and proteins. For example, in protein purification, ultrafiltration can remove small molecule impurities and salts from the solution. Therefore achieve protein concentration and purification while preserving the function of bioactive substances.
Other fields:
- In the electronics industry, manufacturers use ultrafiltration machines to produce ultrapure water, supplying a high-purity water source for semiconductor chip manufacturing.
- In the textile industry, ultrafiltration system can recycle and treat dyeing wastewater, enabling the recycling and reuse of dyes and water, thus reducing the industry’s environmental burden.
요약
Ultrafiltration unit can precisely separate substances of different molecular weights, achieving separation results far superior to traditional filtration technologies. Its operation is environmentally friendly, requiring no large amounts of chemical reagents, thus reducing secondary pollution. In the future, ultrafiltration membranes will become more precise, more resistant to fouling, and have a longer lifespan. The combined application of ultrafiltration technology with other separation technologies. For example, reverse osmosis and nanofiltration will become more mature, meeting more complex separation needs.
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