JPH035874B

• Main Authors: ARITA TOKUJIRO, TAKATOMI HIROSHI, ITO SHINSUKE, YAMAUCHI SHINJI, OGAWA KOJI
• Format: Patent
• Language: English
• Published: 28.01.1991
• Subjects: CLEANING; CLEANING IN GENERAL; DISPOSAL OF SOLID WASTE; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; PERFORMING OPERATIONS; PREVENTION OF FOULING IN GENERAL; RECLAMATION OF CONTAMINED SOIL SOIL; SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; TRANSPORTING

PURPOSE:To prevent the discharge of hamful matter to the outside of the system, by applying cleaning, flocculation, adsorption, etc., to the fragments of spent fluorescent lamps to remove the mercury, fluorescent paint, etc., harmful to the human body, obtaining a reutilizable fluorescent lamp material, and circulating the cleaning soln. CONSTITUTION:The fragments 1 of fluorescent lamps are introduced into a rotary cleaning device 3 having a filtration part and an agitating impeller, and a cleaning soln. such as water is sprinkled while rotating the device 3 to isolate the mercury and fluorescent paint into the soln. The fragments separated and discharged from the device 3 are dried by a drier 29, screened by a screen 32, and taken out. The cleaning soln. contg. mercury and fluorescent paint is introduced into a reaction vessel 12, a flocculant is added to the soln. to flocculate the fluorescent paint, and the flocus are removed by filtration. The filtrate is passed through a chelating mercury adsorbent bed 22 to remove the mercury, and circulated and used as the cleaning soln. As a result, the mercury, fluorescent paint, etc., harmful to the human body are removed, a reutilizable fluorescent lamp material is obtained, and the harmful matter is not discharged to the outside of the system since the cleaning soln. is circulated.