Purification of condenser water in thermal power station by superconducting magnetic separation
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS(2011)
Abstract
Thermal power station is made up of a steam turbine and a steam condenser which need a lot of water. The water of steam condenser should be replaced, since scales consisting of iron oxide mainly are accumulated on the surface of condenser pipes as it goes. Superconducting high gradient magnetic separation (HGMS) system has merits to remove paramagnetic substance like iron oxides because it can generate higher magnetic field strength than electromagnet or permanent magnet. In this paper, cryo-cooled Nb-Ti superconducting magnet that can generate up to 6T was used for HGMS systems. Magnetic filters were designed by the analysis of magnetic field distribution at superconducting magnets. The result of X-ray analysis showed contaminants were mostly alpha-Fe(2)O(3) (hematite) and gamma-Fe(2)O(3) (maghemite). The higher magnetic field was applied up to 6 T, the more iron oxides were removed. As the wire diameter of magnetic filter decreased, the turbidity removal of the sample was enhanced. (C) 2011 Elsevier B.V. All rights reserved.
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Key words
Superconducting magnetic separation,Steam condenser,HGMS
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