Apparatus for reactivation of active carbon and the like
AssigneeAccord Mech. Kabushiki Kaisha
InventorKazusa Hirakawa
Life of this patent
Estimating the term…
Abstract
The rotary drum of reactivation apparatus has spaced-apart helical electrodes disposed in mutually interposed helical state and fixed to the inner wall surface of the drum, these electrodes functioning upon rotation of the drum to propel by screw action active carbon from an inlet end to the other outlet end of the drum as electric power is supplied to the electrodes to cause electric discharge therebetween and conduction through the carbon, which is thereby subjected sequentially to drying, firing, and reactivation as a result of electric discharge effect and the resulting joule heat. Flow of excessive current between the electrodes is prevented by a constant-current circuit in the electric power supply system. Steam can be additionally injected against the carbon to promote the reactivation thereof.
Claims8
Apparatus for reactivation of a material, comprising:
- a hollow cylindrical drum made of heat-resistant material and supported rotatably about the centerline axis thereof, said drum having an inlet at one end thereof for feeding said material thereinto and an outlet at the other end thereof for discharging said material after reactivation therefrom;
- motive power means for driving the drum in rotation about said axis;
- helical electrodes of mutually different polarity disposed in mutually interposed helical state with a constant spacing therebetween around and along substantially the entire inner wall surface of the drum and fixed to said surface, said electrodes functioning upon rotation of the drum to propel by screw action the material from said inlet to said outlet;
- and means for supplying electric power to said electodes for causing electric discharge therebetween and conduction through the material being thus propelled thereby to subject the material sequentially to drying, firing, and reactivation as a result of electric discharge effect and the resulting joule heat.
Dependencies are inferred from the claim text.