ELECTROSTATIC SEPARATION METHOD AND ELECTROSTATIC SEPARATOR

• Main Authors: MAYUMI, YASUHIRO, FUKUMOTO, KOUJI, MASHIO, KEIICHI, TAKIKAWA, NOBORU, MASAMOTO, MANABU
• Format: Patent
• Language: English; French; German
• Published: 27.04.2011
• Subjects: DISPOSAL OF SOLID WASTE; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROMSOLID MATERIALS OR FLUIDS; PERFORMING OPERATIONS; RECLAMATION OF CONTAMINED SOIL SOIL; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; TRANSPORTING

[Object] The present invention provides an electrostatic separation method and an electrostatic separation device each of which, even in a case where the concentration of unburned components of coal ash produced by a boiler of a coal-fired power plant is as high as 15% to 30%, can stably separate the ash (into high unburned component ash and low unburned component ash) without generating spark, reuse the high unburned component ash as fuel, and reuse the low unburned component ash as, for example, an auxiliary material of concrete. [Means to Achieve the Object] The electrostatic separation method and the electrostatic separation device each of which separates unburned carbon ash contained in the coal ash by an electrostatic force, wherein: a substantially flat plate lower side electrode and an upper side electrode disposed above the lower side electrode and including a high dielectric resin element are disposed; a separation zone formed by an electrostatic force is formed by generating a DC electric field between the lower side electrode and the upper side electrode where one of the lower side electrode and the upper side electrode is a positive polarity, and another electrode is a negative polarity; and the unburned carbon ash in the coal ash supplied to the separation zone is separated.