Coal pyrolysis device

Abstract

The purpose of the present invention is to enable low-cost acquisition of an inert gas (low-oxygen concentration gas) promoting the release of a pyrolyzed gas from coal. The invention is provided with: a coal pyrolysis device main body ( 110 ) utilizing the rotary kiln method; exhaust means ( 118, 118 a to 118 c, 130 ), connected to an outer cylinder ( 113 ) of the coal pyrolysis device main body ( 110 ), for exhausting an exhaust gas present inside the outer cylinder ( 113 ); gas extraction means ( 141, 141 a, 141 b, 143, 144, 144 a ) for extracting a portion of the exhaust gas exhausted by the exhaust means; and low-oxygen concentration gas supply means ( 141, 141 a, 141 b, 147, 142, 145, 145 a, 146 ) for delivering into the inner cylinder ( 112 ) the exhaust gas extracted by the gas extraction means so that the oxygen concentration of the exhaust gas is lowered.

1 . A coal pyrolysis device comprising:
 a rotary kiln type coal pyrolysis device main body that rotatably supports an inner cylinder inside an outer cylinder, the rotary kiln type coal pyrolysis device main body being configured to supply coal into the inner cylinder from a first end side of the inner cylinder as well as supplying heating gas into the outer cylinder and rotate the inner cylinder to heat and pyrolyze the coal while moving the coal from the first end side of the inner cylinder to a second end side and agitating the coal, and to output the pyrolyzed coal and pyrolyzed gas from the second end side of the inner cylinder;   exhaust means provided connected to the outer cylinder, the exhaust means being for exhausting the heating gas within the outer cylinder;   gas extraction means for extracting a portion of the heating gas exhausted by the exhaust gas means; and   low-oxygen concentration gas supply means for supplying the heating gas extracted by the gas extraction means into the inner cylinder so that a concentration of oxygen contained in the heating gas is reduced.   
     
     
         2 . The coal pyrolysis device according to  claim 1 , wherein
 the low-oxygen concentration gas supply means include deoxygenation means for removing the oxygen contained in the heating gas, and low-oxygen concentration gas delivery means for delivering the low-oxygen concentration gas obtained from the deoxygenation means into the inner cylinder.   
     
     
         3 . The coal pyrolysis device according to  claim 2 , wherein
 the deoxygenation means include fuel addition means for adding fuel to the heating gas, and a combustion catalyst provided so as to come into contact with the heating gas to which the fuel has been added.   
     
     
         4 . The coal pyrolysis device according to  claim 3 , further comprising
 heating means provided in the gas extraction means, the heating means being for heating the heating gas.   
     
     
         5 . The coal pyrolysis device according to  claim 3 , further comprising
 desulfurization means provided in the exhaust means, the desulfurization means being for removing sulfur oxide contained in the heating gas.   
     
     
         6 . The coal pyrolysis device according to  claim 4 , further comprising:
 oxygen concentration measuring means for measuring an oxygen concentration of the low-oxygen concentration gas delivered by the low-oxygen concentration gas delivery means; and   fuel addition quantity control means for controlling a quantity of the fuel added by the fuel addition means based on information obtained by the oxygen concentration measuring means so that the oxygen concentration of the low-oxygen concentration gas is 1.5% or less.   
     
     
         7 . The coal pyrolysis device according to  claim 2 , wherein
 the deoxygenation means include an alternating combustion device that includes a combustion chamber to which the heating gas is delivered, a burner provided within the combustion chamber, and an alternating type heat exchanger provided within the combustion chamber in a location to which the heating gas is delivered, and fuel addition means for adding fuel to the combustion chamber.   
     
     
         8 . The coal pyrolysis device according to  claim 7 , further comprising:
 oxygen concentration measuring means for measuring the concentration of oxygen contained in the heating gas delivered by the low-oxygen concentration gas delivery means; and   fuel addition quantity control means for controlling a quantity of the fuel added by the fuel addition means based on information obtained by the oxygen concentration measuring means so that the oxygen concentration of the low-oxygen concentration gas is 1.5% or less.   
     
     
         9 . The coal pyrolysis device according to  claim 1 , wherein
 the low-oxygen concentration gas supply means include heating gas delivery means for delivering the heating gas extracted by the gas extraction means into the inner cylinder, and fuel addition means for adding fuel to the heating gas delivered into the inner cylinder by the heating gas delivery means.   
     
     
         10 . The coal pyrolysis device according to  claim 9 , further comprising:
 heating gas flow rate measuring means for measuring a flow rate of the heating gas delivered by the heating gas delivery means;   oxygen concentration measuring means for measuring a concentration of oxygen contained in the heating gas delivered by the heating gas delivery means; and   fuel addition quantity control means for controlling a quantity of the fuel added by the fuel addition means based on information obtained by the heating gas flow rate measuring means and the oxygen concentration measuring means so that the oxygen concentration of the low-oxygen concentration gas is 1.5% or less.