INTRODUCTION

Ultrafiltration equipment is an important membrane separation water treatment equipment that is widely used in numerous fields. It mainly consists of ultrafiltration membrane modules, pumps, valves, pipelines, and control systems.

The ultrafiltration membrane module is the core component. Common ultrafiltration membranes come in various forms such as hollow fiber membranes and flat sheet membranes. Hollow fiber ultrafiltration membranes are like numerous extremely thin hollow fiber bundles integrated together, and the walls of each fiber possess a sieving function. Flat sheet membranes have a flat sheet structure. These ultrafiltration membranes are mostly made of high-molecular materials such as polysulfone and polyacrylonitrile, which have good chemical stability and mechanical strength and can adapt to different water quality environments.

Ultrafiltration equipment has a rich variety of specifications and can be flexibly selected according to the water treatment capacity and water quality requirements. It can play an excellent role with appropriate equipment configurations, whether it is for purifying the daily drinking water of households or dealing with large-scale industrial wastewater treatment or the in-depth purification of municipal water supply. Its overall appearance has a reasonable layout and a compact structure. Moreover, with the integration of automation technology, its operation has become more and more convenient, enabling precise control of operating parameters and ensuring a stable and efficient water treatment process.

WORKING PRINCIPLE

The working principle of ultrafiltration equipment is based on the sieving effect of the ultrafiltration membrane. When the water to be treated enters the ultrafiltration equipment under the pressure drive of the pump, the water flow will come into contact with the surface of the ultrafiltration membrane.

Since the ultrafiltration membrane has a specific pore size range, usually between 0.001 and 0.1 micrometers, water and small-molecule substances smaller than the membrane pore size, such as inorganic salts and small-molecular organic substances, can smoothly pass through the membrane pores under the driving force of the pressure difference and reach the other side of the membrane to form the product water. While substances larger than the membrane pore size, such as colloids, bacteria, macromolecular organic substances, and suspended solids, will be retained on the influent side of the membrane and discharged from the equipment along with the concentrated water, thus realizing the filtration and separation of the raw water and achieving the purpose of purifying the water quality. It's just like a fine sieve that effectively distinguishes and separates substances of different sizes in water.

MAIN PERFORMANCE AND CHARACTERISTICS

l High-Precision Filtration Effect: Thanks to the precise pore size setting, ultrafiltration equipment has a strong ability to retain impurities in water. For example, the removal rate of common bacteria and viruses in water can reach over 99%, and colloids and suspended solids can also be removed in large quantities, significantly improving the clarity and purity of water quality and ensuring that the treated water meets the basic hygiene requirements of various water use scenarios.

l Good Flux Performance: Under a reasonable operating pressure, ultrafiltration equipment has a considerable water flux and can handle a relatively large amount of water within a unit time. It can well meet both the continuous water supply requirements for industrial production and the intermittent water demand of households, ensuring the timeliness and adequacy of water use.

l Anti-pollution and Easy to Clean: The surface properties of the ultrafiltration membrane have been optimized and are relatively less likely to adsorb pollutants in water. Moreover, once pollution occurs, through conventional means such as backwashing and chemical cleaning, the flux and performance of the membrane can be well restored, extending the service life of the membrane, reducing the maintenance cost and usage cost of the equipment.

l Strong Chemical Stability: Due to the use of high-quality high-molecular materials, ultrafiltration equipment can operate stably within a certain range of acid-base environments and has good adaptability to different water qualities. It can be applied to handle various complex water qualities such as acidic industrial wastewater and alkaline printing and dyeing wastewater, broadening its application range.

l Low Operating Pressure and Energy Saving: Compared with some other membrane separation technologies such as reverse osmosis, ultrafiltration equipment usually only requires a relatively low operating pressure, generally between 0.1 and 0.5 MPa. This not only reduces the requirements for supporting power equipment such as pumps but also can save a large amount of energy during long-term operation, which is in line with the current trend of energy conservation and consumption reduction.

APPLICATION FIELDS AND INDUSTRIES

l Drinking Water Treatment:In the municipal water supply system, ultrafiltration equipment can be used as the key equipment in the advanced purification process to further filter the water that has undergone conventional treatment, remove residual tiny impurities such as bacteria and colloids, and improve the quality of drinking water, enabling residents to drink healthier and safer water. Meanwhile, it is also widely used in household water purifiers to provide families with high-quality direct drinking water and meet people's pursuit of high-quality domestic water.

l Industrial Field: The electronics industry has extremely high requirements for the quality of production water. Ultrafiltration equipment can remove impurities in water that may affect the performance of electronic components, ensuring the smooth progress of the pre-treatment process for the preparation of ultrapure water and helping to produce high-quality electronic products. The food and beverage industry uses it to filter the raw water and the water used in the production process to ensure the hygienic quality and taste of products. For example, in beverage production, it can remove microorganisms and impurities in water to make the quality of beverages more stable. The pharmaceutical industry relies on ultrafiltration equipment to conduct pre-treatment of pharmaceutical water, intercept bacteria, macromolecular impurities, etc., laying the foundation for subsequent more refined water treatment processes and ensuring the safety and effectiveness of drug production.

l Wastewater Treatment and Reuse: For industrial wastewater, ultrafiltration equipment can be used as a pretreatment method to retain macromolecular organic substances and suspended solids in wastewater, reducing the burden on subsequent treatment processes, improving the efficiency of the entire wastewater treatment system, making the treated wastewater easier to meet the discharge standards or be recycled, realizing the recycling of water resources, alleviating the shortage of water resources, reducing the water consumption cost of enterprises and the pollution to the environment. In urban sewage treatment, it can also play an important role, filtering out impurities in sewage and facilitating the reuse of sewage, turning urban sewage into a valuable resource.

l Agricultural Irrigation Field: The quality of agricultural irrigation water has a certain impact on the growth of crops. Ultrafiltration equipment can filter irrigation water sources such as surface water and groundwater, remove impurities such as sediment, colloids, and harmful microorganisms, improve the quality of irrigation water, provide a relatively clean and suitable growth environment for crops, help to improve the quality and yield of crops, and promote the sustainable development of agriculture.

SUMMARY

Ultrafiltration equipment, with its unique working principle and excellent performance characteristics, has shown great application value in many fields such as drinking water treatment, industrial production, wastewater treatment and reuse, and agricultural irrigation. It is like an efficient filtration expert for water resource purification, constantly helping to ensure people's water use safety, improving the utilization efficiency of water resources, and providing a powerful water quality guarantee for the development of various industries. With the continuous progress of science and technology, ultrafiltration equipment is expected to make more breakthroughs in performance improvement, cost reduction, and application expansion, further contributing to the protection, utilization, and sustainable development of global water resources and will surely occupy a more important position in the future water treatment field.