Abstract: On July 12, 2018, Professor Huang Xia, Chairman of the Membrane Technology Professional Committee of the International Water Association and Academic Committee of the Environmental College of Tsinghua University, visited Zhejiang Net Source Membrane Technology Co., Ltd. for guidance.

On July 12, 2018, Professor Huang Xia, Chairman of the Membrane Technology Professional Committee of the International Water Association and Academic Committee of the Environmental College of Tsinghua University, visited Zhejiang Jingyuan Membrane Technology Co., Ltd. for guidance.

▲ Professor Huang Xia visited the net source department to guide the exchange

Professor Huang Xia is mainly engaged in research in the fields of sewage resource utilization, membrane technology, bioelectrochemical technology, etc., winner of the National Outstanding Youth Fund, Distinguished Professor of the Ministry of Education, Jiang Scholars, Senior Fellow of the International Water Association and Chairman of the Membrane Technology Committee. He is currently the director of the State Key Laboratory of Environmental Simulation and Pollution Control, the director of the Academic Committee of the Environmental College of Tsinghua University, and the director of the Institute of Water Environment Protection of the School of Environment. He has won the second prize of National Science and Technology Progress Award, the first prize of 5 provincial and ministerial awards, and the TOP Award of ES&T Technical Paper.

▲ Professor Huang Xia visited the company workshop

Chen Hao, the vice chairman of Jingyuan Technology, and Wu Wuchao, general manager of the company, presented and introduced the nuclear product PTFE hollow fiber membrane and research and development process of Jingyuan Technology. The performance of the PTFE hollow fiber membrane, engineering application and membrane The technical development and industry situation were discussed in depth.

Professor Huang Xia said that Net Source Technology is at the forefront of international R&D, breaking international monopoly and filling domestic gaps. Through independent research and development, it has a full range of ultrafiltration membrane products such as PVDF and PTFE and its PTFE-free green manufacturing process. The industrial development of water treatment membranes is of great significance.

At the same time, she focused on the high anti-pollution, acid and alkali resistance, organic solvent resistance, temperature resistance, high membrane flux, high mechanical strength and high service life of PTFE hollow fiber membranes in engineering applications. Product performance advantages, and the "anchor-type cut-free" PTFE membrane packaging process unique to Net Source Technology has been fully affirmed.

In addition, the two sides have conducted in-depth discussions on the common problems in the current application of membrane products. They all believe that the current PVDF membrane products have limitations in the production process and application. These limitations are related to the national environmental protection requirements. And membrane separation technology has been constantly appearing in more in-depth applications in various industries, and has begun to plague the development of the industry.

"Netsource Technology's PTFE products not only break through the monopoly blockade of similar foreign products in terms of technology, but also through the upgrading of technology upgrades and preparation processes, so that their product performance is better than similar foreign products, more importantly, Net Source Technology It realizes the green manufacturing process of PTFE hollow fiber membrane without waste water discharge, and has completely independent intellectual property rights. Through mass production of products, the production cost is reduced, and the domestic PTFE membrane products are more competitive in price. This also makes PTFE Hollow fiber membrane products are no longer 'high on top', giving users who are attracted to the excellent performance of PTFE membrane products, but who are discouraged by their high price, have a new choice," said Wu Xiaochao, general manager.

▲ Professor Huang Xia visited the company showroom

▲ Professor Huang Xia visited the company workshop

In addition, Professor Huang Xia visited Wanhua Chemical (Ningbo) Co., Ltd., and conducted academic exchanges with Wanhua Chemical Joint Equipment Department. He also guided the work of Wanhua Chemical at the site of the company.

▲ Professor Huang Xia visited Wanhua Chemical Exhibition Hall

▲ Professor Huang Xia and Wanhua Chemical conduct academic exchanges

As the world's largest MDI manufacturing company, Wanhua Chemical is the only company in China that has independent intellectual property rights in MDI manufacturing technology. It has broken through the 40-year technical blockade of foreign companies by polycarbonate, HDI, HMDI and IPDI. Become the only two or three companies in the world that master this core technology. As a well-known domestic circular economy demonstration enterprise, Wanhua Chemical has rich experience in the field of chemical wastewater treatment and MBR process application.

The relevant person in charge of Wanhua Chemical Joint Equipment Department introduced the process design and operation of Wanhua Chemical in gasification wastewater, aniline and alcohol ammonia wastewater treatment system, and explained the process characteristics of the system in detail. Focus on the actual application of membrane products of various brands and materials in the application of Wanhua Chemical MBR process. Through the comparison of operational data, the performance difference of each brand membrane product in the process of use was analyzed in detail.

▲ Professor Huang Xia visited the Wanhua project site

▲ Professor Huang Xia visited the Wanhua project site

In March 2017, Netsource Technology cooperated with Wanhua Chemical and Institute of Process Engineering of Chinese Academy of Sciences to cooperate with the demonstration application project of PTFE hollow fiber membrane MBR process in typical chemical wastewater treatment. At present, the project has been installed and commissioned and put into use. Designed to compare the performance of PTFE hollow fiber membranes with imported PVDF hollow fiber membrane products under the same and enhanced operating conditions, according to the actual operational data, through the hollow fiber membrane MBR integration process of PTFE and PVDF in typical chemical industry. Data analysis and evaluation in wastewater treatment, establish efficient integrated configuration standards and operating procedures, and carry out demonstration promotion and application in the industry to create value for more industrial enterprises. This is also the net source technology following the PTFE ultrafiltration membrane technology in printing and dyeing wastewater (Qingmao printing and dyeing 5,000 tons / day project), steel wastewater (Ningbo Iron and Steel Plant 25,000 tons / day project), electroplating wastewater (Guangdong Jieyang Sino-German Metal Eco-city surface treatment Eco-industrial park 6500 tons / day project), landfill leachate (light large environmental protection Wuxi Xidong waste incineration power generation 900 tons / day project), meal waste biogas wastewater (kaicheng environmental project) and other high-difficult industry wastewater treatment field another major Successful application.

▲ Netsource Technology signed a strategic cooperation agreement with Wanhua Chemical and the Institute of Process Engineering of the Chinese Academy of Sciences

Through this inspection, Professor Huang Xia believes that Net Source Technology can realize the technological breakthrough and mass production of PTFE hollow fiber membrane preparation in just a few years, and has established a successful demonstration case of engineering application in many fields. Professor Huang Xia said that he will pay more attention to the application and evaluation of PTFE products of Netsource Technology in the follow-up research activities, and he hopes that the application of PTFE hollow fiber membranes in Wanhua Chemical will be high hope. The road to scientific research will continue to strengthen the academic exchanges within the industry, jointly promote the development of China's membrane industry, and make China's national independent brands to the forefront of the world.