Activated carbon and production thereof
AssigneeThe Social Welfare Foundation Hokkaido Rehabily
InventorsTakeji Kobata, Yoshihiro Ikenaga
Life of this patent
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Abstract
A preparing process of activated carbon includes steps of: combusting scrap tires containing metal wire at 400.degree. C. to 900.degree. C. under the presence of oxygen, carbon dioxide and vapor; reheating the generated combustible gases up to 800.degree. C. to 900.degree. C. by adding a further fuel; causing the exhaust gas to heat-exchange with a water pipe boiler so that the temperature of the exhaust gas downs to 180.degree. C. to 250.degree. C.; and introducing the exhaust having a temperature of 180.degree. C. to 250.degree. C. into an electric dust collector so as to collect activated carbon. The particle size of the thus obtained distributed substantially in a range of 90 to 110 mesh and the CEC (cation exchange capacity) of the activated carbon falls within 30 to 40.
Claims1
An apparatus for burning scrap tires and for the production of activated carbon comprising:
- a boiler outer casing with a tire charging port;
- an upper water chamber;
- a lower combustion chamber;
- an ash collecting room;
- a lattice partition disposed between an upper part composed of said upper water chamber and said lower combustion chamber and a lower part composed of said ash collecting room;
- a lower water chamber communicating with said upper water chamber;
- an upper combustion chamber communicating with said lower combustion chamber;
- a number of inclined water pipes, disposed inside said lower combustion chamber and connected to said lower water chamber;
- a number of furnace tubes, disposed inside said upper water chamber and connected to said upper combustion chamber;
- said upper water chamber, said lower combustion chamber, said ash collecting room, said lower water chamber and said upper combustion chamber being disposed inside said boiler outer casing;
- an air jacket disposed on a side wall of said outer casing;
- a number of blast tubes for communicating said air jacket with said lower combustion chamber through said lower water chamber;
- a blower connected to said air jacket by a duct, said blower connected through a valve means with a tubular body for supplying a water spray;
- the walls of said ash collecting room being constructed of a porous castable structure;
- the apparatus further comprising an inertial separation type dust collector connected to an exhaust gas tube disposed in the rear portion of said furnace tubes;
- and
- an electric dust collector between said exhaust gas tube and a chimney.
Dependencies are inferred from the claim text.