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Sep
07

Superconducting high gradient magnetic separation: a new way of industrial wastewater treatment – In

Superconducting high gradient magnetic separation: a new way of industrial wastewater treatment – In

Article by jekky
























The morning of February 20 this year, as to the west of the urban water supply treatment plant, the more the water plant pollution by phenol compounds, Yancheng District, a major area without water, at least 20 million people living affected in varying degrees. 60 hours after the incident, Yancheng City water supply return to normal levels. 6, Yancheng City People’s Government held a news conference, announced that it will remove water to within one month all around for all chemical companies. original message 2 Application of a superconducting magnet technology that uses superconducting high gradient magnetic separation technique can be used in paper making, chemical industry, pharmaceutical industry wastewater purification separation. With the traditional separation of superconducting magnetic separation technology can only minerals, coal, kaolin in different magnetic impurities, the technology through pre-accession to the magnetic seed particles of modified materials, resulting in the separation of industrial wastewater in the non-magnetic organic, inorganic pollutants, to achieve industrial Sewage The discharge standards. The technology is thus Technical Institute of Physics, Chinese Academy of Li to the wind research team led by researchers with Northeastern University and Shenyang Water Group Co., Ltd. water industry R & D Center Cooperation Jointly completed the study published in the “Technology Review” magazine No. 3, 2009, entitled “Superconducting magnetic separation and purification of sewage in the application of paper mill research,” the study by the national “Eleventh Five-Year” 863 overseas Chinese Academy of Science Distinguished Scholar Program and Fund. Industrial wastewater discharge standards, such as not endanger a lot. However, the use of chemical and biochemical methods exist large investment and high operating costs, the reaction time is long, covers an area of low efficiency, high energy consumption many problems. For small enterprises that discharge wastewater treatment, these problems are even more prominent manufacturers Ruoyin build sewage treatment facilities investment is too high, most likely to take vertical or waste-water treatment, to Environment Causing more harm. Therefore, to make new, efficient, low-cost wastewater treatment technology research and more important and urgent.?? Technical analysis??? Ferromagnetic particles and pollutants Xu receivedIndustrial wastewater are generally organic and inorganic pollutants, as these pollutants itself is not magnetic, the magnetic field generated by the magnetic attraction can not be separated. The researchers designed and developed a refrigerator cooled superconducting magnet, the magnetic field up to 3.92T. Using the superconducting magnet of the paper mill waste water treatment magnetic separation. Experiment with pre-added to the waste water through surface modification of plasma polymerization of organic ferromagnetism magnetic particles and harmful substances and sewage Africa Xu received, through the strong magnetic field to achieve separation of water pollutants. Experimental results show that the treated wastewater by magnetic separation from the start of its COD value of 1780mg / L reduced to 147mg / L, clean effect is good.?? Technical background??? Development of magnetic separationMagnetic separation is a magnet provided by magnetic forces to achieve physical separation techniques, is the physical separation, is the early 70s of last century in the United States developed a magnetic separation technology, application of the law can quickly isolate mixture of magnetic impurities. However, as previously used for magnetic separation of the magnets are mostly ordinary electromagnet or permanent magnet, the magnetic field provided by the 1 Tesla (T) around magnetic separation was not obvious. Magnets, magnetic field strength affect the separation efficiency is an important parameter, along with the development of superconducting technology, using superconducting materials, superconducting magnet system, available around the high magnetic field, magnetic field strength of 3T is easy to reach even higher, and can provide a larger space within the strong magnetic field and high gradient magnetic field for magnetic separation can significantly increase the processing capacity. Application of superconducting magnetic separation Separation using superconducting magnets ore, coal, kaolin and other solid matter in the magnetic impurity has been widely used, such as mining of coal, the unavoidable presence of scrap iron, detonators and other magnetic impurities, application of superconducting magnetic separation technology well remove these impurities. Superconducting magnet separation, separation in water purification is still less used. In recent years, separated by superconducting magnetic separation purifying steel, aluminum and other metal impurities in wastewater magnetic particle separation effect is obvious, but limited to magnetic separation of metal pollutants in wastewater. For wastewater organic and inorganic pollutants, as these pollutants itself is not magnetic, the magnetic field generated by the magnetic attraction can not be separated; the use of a pre-added magnetic particles, the common electromagnet for magnetic field strength is too low, only 1T about separation is not obvious, and thus in the field of sewage treatment has not been applied. Glossary Tesla: magnetic induction unit magnetic field direction perpendicular to the 1-meter-long wire, a 1 ampere of current under magnetic field of 1 Newton force, the power wire location in the magnetic induction intensity is 1 Tesla. digital link 36.6% Seven major river systems in more than half of the rivers are polluted to varying degrees. 36.6% of river water quality is poor five or five, five of which 27.9% had complete loss of the inferior function directly. 524.5 According to 2005 statistics, wastewater discharge up to 52.45 billion tons, of which the industrial wastewater discharge to 24.31 billion tons, accounting for 46%. Total emission of chemical oxygen demand (COD) and total ammonia emissions were 14.142 million tons and 1.498 million tons. 20 This year on February 20 took place in Jiangsu Yancheng Water Pollution Event, was named Yancheng because “ten model enterprises” marked a new 30 tons of phenol waste-water treatment Chemical Co., Ltd. Potash wastewater, drinking water pollution caused 200,000 people to harm people’s lives and the environment.

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I am China Manufacturers writer, reports some information about rubber wood chips, rubberised.












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