Title:
セメント焼成装置及びセメントキルン排ガスの脱硝方法
Document Type and Number:
Japanese Patent JP7212582
Kind Code:
B2
Abstract:
To reduce efficiently a NOX concentration in a cement kiln exhaust gas while maintaining a good calcination state regardless of type of a preliminary calcination furnace.SOLUTION: A cement calcination apparatus 1 includes a first denitration burner 14 that is provided in a kiln butt 4 of a cement kiln 5 and blows fuel F3 and combustion air into the kiln butt to burn the fuel, and a second denitration burner 15 that blows fuel F4 and combustion air into a duct 16 between the kiln butt and a preliminary calcination furnace 3 attached to the cement kiln. The second denitration burner can be provided with swirling means for swirling a mixed flow of the fuel and the combustion air. An amount of the fuel supplied into the kiln butt of the cement kiln by the first denitration burner can be 20% or more and 50% or less of an amount of the fuel supplied to the preliminary calcination furnace, and an amount of the fuel supplied into the duct by the second denitration burner can be 20% or more and 80% or less of the amount of the fuel supplied to the preliminary calcination furnace.SELECTED DRAWING: Figure 1
Inventors:
Suzuki Hideto
Application Number:
JP2019098379A
Publication Date:
January 25, 2023
Filing Date:
May 27, 2019
Export Citation:
Assignee:
Suzuki Hideto
International Classes:
C04B7/36; B01D53/56; B01D53/76; C04B7/44; F23C99/00
Domestic Patent References:
| JP5722147A |
Attorney, Agent or Firm:
Nakai Jun