RO-EDI purified water equipment, pure water treatment machine equipment, soft water treatment equipment, RO reverse osmosis device. Membrane separation technology can be simply described as a filtration technology. It began with RO reverse osmosis membranes in seawater desalination equipment in the 1960s and is commonly referred to as one of the six new technological applications in the industrial production industry in the 21st century, along with nanotubes, fiber optic cables, carbon fiber materials, nanomaterials, etc. Then membrane separation technology has gained a very rapid development trend and is widely used in more and more industries. After desalination RO reverse osmosis, a series of looser infiltration membranes have been developed and designed, including nanofiltration membranes, ultrafiltration, and microfiltration.

The use of ultrafiltration technology as a process treatment for water plants has gradually become popular. In 1996, the total water output of the ultrafiltration water plant was 200000 m3/d, and in 2006, the water output was over 8 million m3/d. Currently, there are 250 ultrafiltration and microfiltration water plants in North America, with a total water output of 3 million m3/d; In the European region, there are 33 ultrafiltration water plants with a capacity of over 10000 m3/d, and more than 100 large city water plants in the United States, which can solve a water volume of 1.1 million m3/d; In the Asian region, Japan's membrane filtration plants have achieved a water production capacity of 4 million m3/d, while Malaysia has completed 275000 m3/d of ultrafiltration. In China, with the development trend of membrane industry production, the price challenge of blocking the use of ultrafiltration membranes will no longer be significant. At present, the price of hollow chemical fiber ultrafiltration membranes on the sales market is 150 yuan per square meter of total filtration area. Based on the calculation that 1.2 meters of ultrafiltration membrane filters 0.1 meters of water per hour, the price of 1 meter of 3/d ultrafiltration membrane is 60 yuan. According to the calculation of three years of application, the cost of dismantling and replacing the ultrafiltration membrane is only 0.057 yuan per cubic meter of water. Taking the 10000 m3/d ultrafiltration water treatment plant completed in Suzhou as an example, the basic construction cost is about 300 yuan/m3/d, and the operating cost is 0.078 yuan/m3, which is roughly the same as the original traditional handicraft of the water plant.

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