Production method of reformed coal

Abstract

The purpose of the present invention is to increase the calorific value, and to obtain coal having further reduced mercury content. A drying step (S 1 ) of drying low-rank coal ( 1 ) constituting coal to obtain dried coal ( 2 ), a dry deashing step of removing ash ( 6 ) from the dried coal ( 2 ) obtained in the drying step (S 1 ) by a dry deashing apparatus, and a pyrolyzing step (S 3 ) of pyrolyzing the deashed dried coal ( 3 ) obtained in the dry deashing step (S 2 ) to obtain deashed pyrolyzed coal ( 4 ) are performed.

1 . A production method of reformed coal, the method comprising:
 a drying step of drying coal to obtain dried coal;   a dry deashing step of removing ash from the dried coal obtained in the drying step to obtain deashed dried coal; and   a pyrolyzing step of pyrolyzing the deashed dried coal obtained in the dry deashing step to obtain deashed pyrolyzed coal.   
     
     
         2 . The production method of reformed coal according to  claim 1 , further comprising:
 a dividing step of dividing out a portion of the deashed dried coal obtained in the dry deashing step; and   a mixing step of mixing the deashed dried coal divided out in the dividing step with the deashed pyrolyzed coal obtained in the pyrolyzing step to obtain mixed coal.   
     
     
         3 . The production method of reformed coal according to  claim 1 , wherein
 the dry deashing step is performed using a pulverizer that pulverizes the dried coal and a magnetic separation apparatus that magnetically separates and removes the ash from the dried coal pulverized by the pulverizer.   
     
     
         4 - 5 . (canceled) 
     
     
         6 . The production method of reformed coal according to  claim 2 , wherein
 the dry deashing step is performed using a pulverizer that pulverizes the dried coal and a magnetic separation apparatus that magnetically separates and removes the ash from the dried coal pulverized by the pulverizer.   
     
     
         7 . The production method of reformed coal according to  claim 1 , wherein
 the dry deashing step is performed using an air stream separation apparatus that, with an air stream, separates and removes the ash from the dried coal.   
     
     
         8 . The production method of reformed coal according to  claim 2 , wherein
 the dry deashing step is performed using an air stream separation apparatus that, with an air stream, separates and removes the ash from the dried coal.   
     
     
         9 . The production method of reformed coal according to  claim 1 , wherein
 the coal is low-grade coal.   
     
     
         10 . The production method of reformed coal according to  claim 2 , wherein
 the coal is low-grade coal.   
     
     
         11 . The production method of reformed coal according to  claim 3 , wherein
 the coal is low-grade coal.   
     
     
         12 . The production method of reformed coal according to  claim 6 , wherein
 the coal is low-grade coal.   
     
     
         13 . The production method of reformed coal according to  claim 7 , wherein
 the coal is low-grade coal.   
     
     
         14 . The production method of reformed coal according to  claim 8 , wherein
 the coal is low-grade coal.