WO 2022/130730 A1

Cement clinker production system and cement clinker production

(22) 29.09.2021

(43) 23.06.2022

(57) Provided is a cement clinker manufacturing system with which it is possible to increase the carbon dioxide gas concentration of some exhaust gas and to obtain a gas containing high-concentration carbon dioxide gas. A cement clinker manufacturing system 1 including: a combustion-supporting gas supply apparatus including a cyclone-type preheating device 2 for preheating a cement clinker raw material, a rotary kiln 3 for firing the preheated cement clinker raw material and obtaining cement clinker, a calcination furnace 4 for promoting decarboxylation of the cement clinker raw material, a clinker cooler 5 for cooling the cement clinker, and kiln exhaust gas discharge paths 6a-6e for discharging an exhaust gas produced in the rotary kiln 3, the combustion-supporting gas supply apparatus supplying a combustion-supporting gas in which the oxygen concentration is made higher than that of air; a combustion-supporting gas supply path 8 for guiding the combustion-supporting gas to the calcination furnace; and a calcination furnace exhaust gas discharge path 9 (limited to a configuration different from the kiln exhaust gas discharge paths 6) for discharging the exhaust gas produced in the calcination furnace 4.

(71) Taiheiyo Cement Corporation, Tokyo (JP)

(84)  ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)

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