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Patent Searching and Data


Title:
APPARATUS FOR BURNING CEMENT CLINKER
Document Type and Number:
Japanese Patent JP3250758
Kind Code:
B2
Abstract:

PURPOSE: To enhance denitration effect in an apparatus for burning a cement clinker.
CONSTITUTION: Cement raw material powder is preheated by a preheater 10 and granulated by a spouted bed layer or a fluid bed layer granulating furnace 21, burned by a fluidized bed layer burning furnace 22 and cooled by a fluidized bed layer cooler 23 and a packing layer cooler 24 to form a cement clinker. A calcining furnace 15 is included in the preheater 10. A discharge gas 40 from the spouted bed layer or fluidized bed layer granulating furnace 21 is fed from the bottom of the calcining furnace 15. A partial discharge gas 41 is blown from nozzles 43 and 44 so as to form swirl flow. A discharge gas blown from the lower part of a throttle 45 is mixed with a fuel from a burner 42 and raw material powder from a fuel feeding chute 46 and endothermic decomposition reaction of the raw material is promoted by combustion. Since this endothermic decomposition reaction is carried out at 850-900°C and the burning is carried out in reducing atmosphere, high denitration effect is attained. The remaining fuel is subjected to secondary burning by discharge gas from the nozzle 44 on the upper part of the throttle 45.


Inventors:
Satou, Nichitaka
Mukai, Katsuharu
Ishibachi, Toshiyuki
Hashimoto, Isao
Murao, Mikio
Kanamori, Shozo
Application Number:
JP1993000073882
Publication Date:
January 28, 2002
Filing Date:
March 31, 1993
Export Citation:
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Assignee:
SUMITOMO CEMENT CO LTD
KAWASAKI HEAVY IND LTD
International Classes:
C04B7/44; C04B7/45; F27B15/00; (IPC1-7): C04B7/45; F27B15/00
Attorney, Agent or Firm:
西教 圭一郎 (外2名)