METHOD FOR REDUCING WATER CONTENT IN SLUDGE

• Main Authors: SERIZAWA YASUBUMI, MASUKAWA MASANOBU, SUZUKI SHIGEYASU, YOSHIDA KAZUHIKO, FUKUSHIMA NOBUO
• Format: Patent
• Language: English
• Published: 09.03.1988
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; SEPARATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PURPOSE:To reduce the water content in sludge separated from gas treating water in a wet dust collector to increase the hydroxides and carbonates in the sludge, and controlling the pH of the gas treating water to 7.5-9.5. CONSTITUTION:The dust-contg. gas generated in a ferromanganese refining vertical furnace is passed through a dry dust collector 12, a cyclone 13, a submerged vessel 14, a submerged venturi scrubber 15, a submerged vessel 16, and an electrostatic precipitator 17, and purified. the submerged vessels 14 and 16, the venturi scrubber 15, and the electrostatic precipitator 17 constitute the wet dust collector 18 using gas treating water for purifying the gas. The gas is brought into contact with the gas treating water and agitated in one or >=2 devices constituting the wet dust collector 18 to increase the hydroxides and carbonates in sludge, and the pH of the gas treating water is controlled to 7.5-9.5.