Modified coal production equipment

Abstract

Modified coal production equipment comprising: first oxygen adsorption speed measuring means ( 141 - 144, 149 a, 149 b ), etc., that sort dried coal ( 3 ) dried in a drying device ( 112 ), and find the oxygen adsorption speed (Vd) of the dried coal ( 3 ); second oxygen adsorption speed measuring means ( 145 - 148, 149 a, 149 b ) that sort modified coal ( 7 ) deactivated by an deactivation treatment device ( 130 ), and find the oxygen adsorption speed (Vr) of the modified coal ( 7 ); and an arithmetic control device ( 150 ) that calculates the oxygen adsorption speed ratio (N) from formula (Vr−Vd)/Vd=N, on the basis of Vd and Vr, and, if N>Ns (a standard value), reads from a map the increased oxygen concentration value (Oa) in a processing gas ( 106 ) corresponding to N, calculates a revised oxygen concentration value (Oc) on the basis of the current oxygen concentration value (Op) and Oa, and controls blowers ( 133, 135 ) so as to reach Oc.

1 . Upgraded coal production equipment including:
 drying means for producing dry coal by removing moisture from raw-material coal;   pyrolysis means for producing pyrolysis coal by performing pyrolysis on the dry coal; and   deactivation processing means for producing upgraded coal by deactivating the pyrolysis coal by heating with processing gas containing oxygen;   first oxygen adsorption rate measuring means for collecting part of the dry coal dried by the drying means and obtaining an oxygen adsorption rate Vd of the dry coal;   second oxygen adsorption rate measuring means for collecting part of the upgraded coal deactivated in the deactivation processing means and obtaining an oxygen adsorption rate Vr of the upgraded coal; and   main arithmetic control means for: calculating an oxygen adsorption rate ratio N from the following oxygen adsorption rate ratio calculation formula on the basis of the oxygen adsorption rates Vd, Vr; if the oxygen adsorption rate ratio N is within a range of a standard value Ns, controlling the deactivation processing means such that a deactivation processing condition is maintained; if the oxygen adsorption rate ratio N is beyond the range of the standard value Ns, reading, from a map, an additional oxygen concentration value Oa to be applied to the processing gas correspondingly to the oxygen adsorption rate ratio N, calculating a corrected oxygen concentration value Oc in the processing gas on the basis of the additional oxygen concentration value Oa and a present oxygen concentration value Op in the processing gas, and controlling the deactivation processing means such that the processing gas is set to the corrected oxygen concentration value Oc; if the oxygen adsorption rate ratio N is below the range of the standard value Ns, reading, from a map, a decrease oxygen concentration value Od to be applied to the processing gas correspondingly to the oxygen adsorption rate ratio N, calculating the corrected oxygen concentration value Oc in the processing gas on the basis of the decrease oxygen concentration value Od and the present oxygen concentration value Op in the processing gas, and controlling the deactivation processing means such that the processing gas is set to the corrected oxygen concentration value Oc,   where the oxygen adsorption rate ratio calculation formula is
     N =|( Vr−Vd )|/ Vd.    
   
     
     
         2 . The upgraded coal production equipment according to  claim 1 , wherein when the corrected oxygen concentration value Oc exceeds an upper limit value Ou, the main arithmetic control means reads, from a map, an additional temperature value Ta to be applied to the processing gas correspondingly to the oxygen adsorption rate ratio N, calculates a corrected temperature value Tc on the basis of the additional temperature value Ta and a present temperature value Tp in the processing gas, and controls the deactivation processing means such that the processing gas is set to the corrected temperature value Tc. 
     
     
         3 . The upgraded coal production equipment according to  claim 1 , wherein
 the second oxygen adsorption rate measuring means obtains a new oxygen adsorption rate Vr n  of the upgraded coal by collecting part of the upgraded coal deactivated in the deactivation processing means, and then, every time a specific time Ts elapses, collecting again part of the upgraded coal newly deactivated in the deactivation processing means, and   the main arithmetic control means: calculates a stability S from the following stability calculation formula on the basis of the current oxygen adsorption rate Vr n  newly obtained and the oxygen adsorption rate Vr n-1  obtained just before the current oxygen adsorption rate Vr n : if the stability S is within a range of a standard value Ss, recalculates the oxygen adsorption rate ratio N from the following oxygen adsorption rate ratio recalculation formula on the basis of the oxygen adsorption rates Vd, Vr n ; and compares the oxygen adsorption rate ratio N with the standard value Ns again,   where the stability calculation formula is
     S =|( Vr   n   −Vr   n-1 )|/ Vr   n , and 
   the oxygen adsorption rate ratio recalculation formula is
     N =|( Vr   n   −Vd )|/ Vd.    
   
     
     
         4 . The upgraded coal production equipment according to  claim 1 , wherein
 the first oxygen adsorption rate measuring means includes:
 first sampling means for collecting the part of the dry coal dried by the drying means as a sample; 
 first testing means for performing an oxygen adsorption test by exposing the sample collected by the first sampling means to oxygen containing gas at a test temperature for a test time Td; 
 first weighing means for measuring a weight Wd1 of the sample, collected by the first sampling means, before the oxygen adsorption test and a weight Wd2 of the sample after the oxygen adsorption test; and 
 first sub-arithmetic control means for calculating the oxygen adsorption rate Vd of the dry coal from the following dry coal oxygen adsorption rate calculation formula on the basis of the weights Wd1, Wd2 measured by the first weighing means, and 
   the second oxygen adsorption rate measuring means includes:
 second sampling means for collecting the part of the upgraded coal deactivated in the deactivation processing means as a sample; 
 second testing means for performing an oxygen adsorption test by exposing the sample collected by the second sampling means to oxygen containing gas at a test temperature for a test time Tr; 
 second weighing means for measuring a weight Wr1 of the sample, collected by the second sampling means, before the oxygen adsorption test and a weight Wr2 of the sample after the oxygen adsorption test; and 
 second sub-arithmetic control means for calculating the oxygen adsorption rate Vr of the upgraded coal from the following upgraded coal oxygen adsorption rate calculation formula on the basis of the weights Wr1, Wr2 measured by the second weighing means, 
   where the dry coal oxygen adsorption rate calculation formula is
     Vd =( Wd 2− Wd 1)/( Wd 1× Td )×100, and
 
   the upgraded coal oxygen adsorption rate calculation formula is
     Vr =( Wr 2− Wr 1)/( Wr 1× Tr )×100.
 
   
     
     
         5 . The upgraded coal production equipment according to  claim 1 , wherein
 the first oxygen adsorption rate measuring means includes:
 first sampling means for collecting the part of the dry coal dried by the drying means as a sample; 
 first weighing means for measuring a weight Wd1 of the sample collected by the first sampling means; 
 first testing means for performing an oxygen adsorption test by holding the sample collected by the first sampling means in an air tight manner for a test time Td in an inside of the first testing means filled with an oxygen containing atmosphere and maintained at a constant temperature; 
 first pressure measuring means for measuring a pressure inside the first testing means; and 
 first sub-arithmetic control means for calculating the oxygen adsorption rate Vd of the dry coal from the following dry coal oxygen adsorption rate calculation formula on the basis of the weight Wd1 measured by the first weighing means as well as an internal pressure Pd1 of the first testing means before the oxygen adsorption test and an internal pressure Pd2 of the first testing means just after the oxygen adsorption test which are measured by the first pressure measuring means with the inside of the first testing means held in the air tight manner while being filled with the oxygen containing atmosphere and maintained at the constant temperature, 
   the second oxygen adsorption rate measuring means includes:
 second sampling means for collecting the part of the upgraded coal deactivated in the deactivation processing means as a sample; 
 second weighing means for measuring a weight Wr1 of the sample collected by the second sampling means; 
 second testing means for performing the oxygen adsorption test by holding the sample collected by the second sampling means in an air tight manner for a test time Tr in an inside of the second testing means filled with an oxygen containing atmosphere and maintained at a constant temperature; 
 second pressure measuring means for measuring a pressure inside the second testing means; and 
 second sub-arithmetic control means for calculating the oxygen adsorption rate Vr of the upgraded coal from the following upgraded coal oxygen adsorption rate calculation formula on the basis of the weight Wr1 measured by the second weighing means as well as an internal pressure Pr1 of the second testing means before the oxygen adsorption test and an internal pressure Pr2 of the second testing means just after the oxygen adsorption test which are measured by the second pressure measuring means with the inside of the second testing means held in the air tight manner while being filled with the oxygen containing atmosphere and maintained at the constant temperature, 
   where the dry coal oxygen adsorption rate calculation formula is
     Vd=Qd /( Wd 1× Td )×100, and
 
   the upgraded coal oxygen adsorption rate calculation formula is
     Vr=Qr /( Wr 1× Tr )×100,
 
   where Qd represents an oxygen adsorption quantity of the dry coal and Qr represents an oxygen adsorption quantity of the upgraded coal, Qd and Qr being values obtained from the formulae shown below,
     Qd =[{( Pd 1− Pd 2)/1013}×{ Cd −( Wd 1/ D )}]/(22.4× Wd 1),
 
     Qr =[{( Pr 1 −Pr 2)/1013}×{ Cr −( Wr 1 /D )}]/(22.4 ×Wr 1),
 
   where Cd represents an internal capacity of the first testing means, Cr represents an internal capacity of the second testing means, and D represents a true density of the raw-material coal.   
     
     
         6 . The upgraded coal production equipment according to  claim 1 , wherein the raw-material coal is brown coal or subbituminous coal.