US 2015/0027872 A1Published application

Modified coal production equipment

AssigneeMitsubishi Heavy Industries, Ltd.

InventorsHyota Abe, Keiichi Nakagawa, Setsuo Omoto

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Abstract

Modified coal production equipment comprising: first oxygen adsorption speed measuring means (141-144, 149a, 149b), 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, 149a, 149b) 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.

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.

11 more elements

Abstract

Claims6