"Weifang Evening News" Reporter Li Nan/Time: 2015-05-13 10:20:11

According to Weifang News Network, May 3, 2015, anyone who has been a crew knows that the most precious thing on a ship is fresh water. If there is a shortage of fresh water, the crew will not only be unable to bathe, but also have problems with normal drinking. Now, however, this problem is expected to be solved. On April 30, the reporter went to Shandong Tianwei Membrane Technology Co., Ltd. located in the coastal area and learned that a magical "membrane" can turn seawater into fresh water for direct drinking.
It is inconvenient for the crew to use water.
Hope to produce fresh water on board

Liu Yujun, 27, from Wangshe Village, Banjielou, Yeyuan Town, Linqu County, has been working as a seaman for four years. For four years, he spent most of his time at sea. Liu Yujun said that the days of being a crew member are bitter and happy, and the hardest thing is to encounter the shortage of fresh water resources, and it is very inconvenient to drink water and take a bath.
Liu Yujun said that there are 23 crew members on his ship. The crew needs an average of about 15 tons of fresh water per day for water and machinery. On average, the ship will go to the port to supply fresh water in one month, carrying nearly 500 tons of fresh water at one time, occupying a lot of space and wasting manpower and material resources. "If only we could produce our own fresh water on board, we could bathe open." Liu Yujun said.
Liu Yujun's dream is now coming true. On April 30, the reporter came to Shandong Tianwei Membrane Technology Co., Ltd. in Binhai District and saw that in the 3500-square-meter workshop, the staff were busy in an orderly manner. Lian Wenyu, a senior engineer at the Shandong Institute of Marine Chemical Science, said that the homogeneous membrane electrodialyzer produced by the company can effectively solve the problem of seawater desalination. "As long as you bring this machine, you can turn sea water into fresh water on the ship." Lian Wenyu pointed to a boxy machine said.
Separated fresh water for drinking
Brine as chemical raw material

Lian Wenyu said that by placing the homogeneous membrane electrodialyzer on a ship, connecting one end of the machine to the sea and pumping inexhaustible seawater into the machine, the machine can effectively separate fresh water from salt water. The secret is something called a homo-ion exchange membrane.
Homogeneous ion exchange membrane is a typical marine new material, the introduction of marine element bromine, by controlling the reaction conditions, can achieve the precise control of bromination position and degree of bromination. "There are multiple membranes in the machine, which isolate the machine into small rooms. Some rooms will produce fresh water and some rooms will flow out of salt water." Lian Wenyu said that this magical "membrane" separates sodium ions from chloride ions in seawater, and finally achieves the purpose of seawater desalination. For the output of fresh water, can be directly for human drinking or machine use, for the output of concentrated seawater, can be used as raw materials to supply chlor-alkali plant or soda ash plant, so as to realize the process transformation of the marine chemical industry. "It can also directly sun salt, saving a lot of sun salt land, shortening the production cycle and reducing labor intensity." Lian Wenyu said that the fresh water and salt water produced by this method can be effectively used.

Compared with the traditional seawater desalination process, homogeneous membrane electrodialyzer has incomparable advantages of low energy consumption, low operating pressure, simple pretreatment and long membrane life.

Will break the foreign blockade

Fill the gaps in this area

In addition to homogeneous membrane electrodialyzer, the company also produces acid separation diffusion dialyzer, alkali separation diffusion dialyzer, bipolar membrane electrodialyzer, etc. Among them, the acid separation diffusion dialyzer can effectively separate the acid and water in the enterprise wastewater, so as to achieve the purpose of energy saving and environmental protection.

Lian Wenyu said that the homogeneous membrane electrodialyzer is currently in the production stage and will soon be put into use; acid separation diffusion dialyzer, alkali separation diffusion dialyzer, bipolar membrane electrodialyzer and other machines have already had many customers all over the country.

After the completion of the company's "high performance series of charged membrane materials and their application key technology development" project, it will effectively promote the technological progress of relevant industries in China, break the foreign blockade of relevant technologies in China, form a unique research, development and production center of charged membrane materials, and fill the gap of related charged membrane industrialization in China.

The project of "high performance series of charged membrane materials and their application key technology development" was proposed by Shandong Tianwei Membrane Technology Co., Ltd. and Shandong Ocean Chemical Research Institute, mainly for the preparation of homogeneous series of charged membrane materials and their application technology development. The project was registered on August 15, 2013 and is expected to be completed in 2018. The project has a research and development team of 21 people, including 5 doctors and 7 senior technicians.