Method for disposing of organic waste of high water content and disposal apparatus therefor

Abstract

A method for disposing of an organic waste of high water content according to the present invention, includes: a step in which by means of a heat exchanger ( 22 ), a heat exchange is carried out between superheated steam and exhaust gas extracted by a cyclone ( 2 b ) of a suspension preheater ( 2 ), the high temperature superheated steam that was subjected to the heat exchange is introduced to a dryer ( 23 ), thereby drying any organic sludge into a dried organic waste, and by means of the heat exchanger ( 22 ), the superheated steam used for the drying is subjected to another heat exchange, thereby recycling the superheated steam in the drying of the organic sludge; and a step in which the resulting dried organic sludge is supplied to a precalcining furnace ( 3 ) as fuel and combusted.

1 . A method for disposing of an organic waste of high water content, which uses a cement burning facility to convert the organic waste of high water content into fuel and to subject the resultant to a combustion treatment, the method comprising:
 a drying step in which the organic waste of high water content is dried to produce a dried organic waste through the use of a heating medium that was subjected to a heat exchange with a high temperature gas extracted from the cement burning facility, and in which the heating medium used for the drying is subjected to another heat exchange with the high temperature gas, thereby recycling the heating medium for drying the organic waste of high water content; and   a combustion step in which the dried organic waste is supplied to the cement burning facility or a combustion apparatus and combusted.   
     
     
         2 . The method for disposing of an organic waste of high water content according to  claim 1 , wherein
 the combustion step is a step in which the dried organic waste is supplied to at least one of a rotary kiln, a precalcining furnace, and a suspension preheater in the cement burning facility, and combusted.   
     
     
         3 . The method for disposing of an organic waste of high water content according to  claim 2 , wherein
 the high temperature gas is a gas extracted from at least one of cyclone gas outlet sections on the respective stages of the suspension preheater in the cement burning facility, and   the heating medium used for the drying is superheated steam generated due to the drying of the organic waste of high water content.   
     
     
         4 . The method for disposing of an organic waste of high water content according to  claim 2 , wherein
 the high temperature gas is any one or both of an exhaust gas discharged from the suspension preheater in the cement burning facility, and an extraction gas extracted from a clinker cooler in the cement burning facility, and   the heating medium used for the drying is superheated steam generated due to the drying of the organic waste of high water content.   
     
     
         5 . The method for disposing of an organic waste of high water content according to  claim 3 , wherein
 a portion of the superheated steam is extracted and subjected to a deodorization treatment, and thereafter, introduced to the cement burning facility.   
     
     
         6 . The method for disposing of an organic waste of high water content according to  claim 3 , wherein a portion of the superheated steam is directly introduced to a section having a temperature of 800° C. or more in the cement burning facility. 
     
     
         7 . An apparatus for disposing of an organic waste of high water content, which uses a cement burning facility to convert the organic waste of high water content into fuel and to subject the resultant to a combustion treatment, the apparatus comprising:
 a heat exchange unit that carries out a heat exchange between a heating medium and a high temperature gas extracted from the cement burning facility;   a drying treatment unit that dries the organic waste of high water content to produce a dried organic waste through the use of the heating medium that was subjected to the heat exchange;   a circulation line that circulates the heating medium used for the drying between the heat exchange unit and the drying treatment unit; and   a supply line that supplies the dried organic waste to the cement burning facility or a combustion apparatus.   
     
     
         8 . The apparatus for disposing of an organic waste of high water content according to  claim 7 , further comprising:
 a deodorization treatment unit that extracts a portion of superheated steam generated in the drying treatment unit and subjects the extracted superheated steam to a deodorization treatment.   
     
     
         9 . The apparatus for disposing of an organic waste of high water content according to  claim 7 , further comprising:
 a deodorization treatment line that extracts a portion of superheated steam generated in the drying treatment unit, introduces the extracted superheated steam directly to a section having a temperature of 800° C. or more in the cement burning facility, and carries out a deodorization treatment.   
     
     
         10 . The apparatus for disposing of an organic waste of high water content according to  claim 7 , further comprising:
 a line that introduces a extraction gas, which is extracted from at least one of cyclone gas outlet sections on the respective stages of a suspension preheater in the cement burning facility, to the heat exchange unit as a high temperature gas.   
     
     
         11 . The apparatus for disposing of an organic waste of high water content according to  claim 7 , further comprising:
 any one or both of a line that introduces an exhaust gas from a suspension preheater in the cement burning facility to the heat exchange unit as a high temperature gas, and a line that introduces a extraction gas, which is extracted from a clinker cooler in the cement burning facility, to the heat exchange unit as a high temperature gas.