METHOD FOR OPERATING ASH MELTING FURNACE

PROBLEM TO BE SOLVED: To lengthen a lifetime by preventing a corrosion of a wall of an ash melting furnace. SOLUTION: The method for operating a DC electric resistance type ash melting furnace 1 for melting an ash by an electric resistance heat, by supplying a current between a furnace bottom electr...

Full description

Saved in:
Bibliographic Details
Main Authors YOSHINARI NAOTO, TAWARA KENICHI, UMEDA JUJIRO, NISHINO JUNYA, MATSUZAWA KATSUAKI
Format Patent
LanguageEnglish
Published 14.09.1999
Edition6
Subjects
BLASTING
COMBUSTION APPARATUS
COMBUSTION PROCESSES
DISPOSAL OF SOLID WASTE
FLUES
HEATING
LIGHTING
MECHANICAL ENGINEERING
PERFORMING OPERATIONS
RECLAMATION OF CONTAMINED SOIL SOIL
REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTIONRESIDUES
TRANSPORTING
WEAPONS
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To lengthen a lifetime by preventing a corrosion of a wall of an ash melting furnace. SOLUTION: The method for operating a DC electric resistance type ash melting furnace 1 for melting an ash by an electric resistance heat, by supplying a current between a furnace bottom electrode 2 provided at a furnace bottom and an upper electrode 3 inserted from a furnace cover, comprises the steps of regulating a basisity of the ash 7 supplied to the furnace 1 to a range of 0.9 to 1.1; sequentially forming from below to above a molten metal layer 9, a molten slag layer 10, a molten transfer layer 11 in which the molten slag and solid ash coexist, and an ash solid layer 12 in the furnace 11; and controlling current and voltage values, so that a current density per sectional area of the furnace becomes 0.1 to 5 A/cm and a power consumption amount per weight of the ash to be treated is 500 to 1,000 kwH/t.
Bibliography:Application Number: JP19980049372