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A platform for research: civil engineering, architecture and urbanism
Improved method for controlling reducing atmosphere in rotary kiln
The invention relates to the technical field of cement manufacturing, and provides an improved method for controlling a reducing atmosphere in a rotary kiln. The sparks of the five-stage discharging pipe are checked through the first spark observation opening, so that the spark condition appearing in the first spark observation opening is eliminated; after it is confirmed that no spark exists in the fifth-stage discharging pipe through a first spark observation opening, the state of the spark at the tail of the kiln is checked through a throat of the smoke chamber at the tail of the kiln; detecting the content of Fe < 2 + > in the clinker discharged from the rotary kiln so as to determine the reducing atmosphere state in the rotary kiln; according to the determined state of the reducing atmosphere in the rotary kiln, outer axial flow air and/or inner rotational flow air are/is adjusted, so that the burn-off rate of pulverized coal is increased by reducing the length of a black fire head of flame, and the purpose of improving the reducing atmosphere in the rotary kiln is achieved. The invention provides an efficient reducing atmosphere detection mode, so that the reducing atmosphere control in the whole cement manufacturing process can be repeatedly operated, and the state can be accurately verified.
本发明涉及水泥制作技术领域，提供了一种改善后的旋窑内还原气氛控制方法。通过所述第一火星观察口，对五级下料管火星进行检查，来消除第一火星观察口中出现的火星情况；在通过第一火星观察口确认五级下料管无火星存在后，通过窑尾烟室缩口检查窑尾火星状态；检测从旋窑出来的熟料中Fe2+含量高低从而确定旋窑内还原气氛状态；据确定出的旋窑内的还原气氛状态，来调整外轴流风和/或内旋流风，以便借助火焰黑火头长度减小来提升煤粉燃尽率，从而达到旋窑内的还原气氛改善目的。本发明提出了一种高效的还原气氛检测方式，使得整个水泥制作过程中的还原气氛控制达到可重复操作，且能精准验证的状态。
Improved method for controlling reducing atmosphere in rotary kiln
The invention relates to the technical field of cement manufacturing, and provides an improved method for controlling a reducing atmosphere in a rotary kiln. The sparks of the five-stage discharging pipe are checked through the first spark observation opening, so that the spark condition appearing in the first spark observation opening is eliminated; after it is confirmed that no spark exists in the fifth-stage discharging pipe through a first spark observation opening, the state of the spark at the tail of the kiln is checked through a throat of the smoke chamber at the tail of the kiln; detecting the content of Fe < 2 + > in the clinker discharged from the rotary kiln so as to determine the reducing atmosphere state in the rotary kiln; according to the determined state of the reducing atmosphere in the rotary kiln, outer axial flow air and/or inner rotational flow air are/is adjusted, so that the burn-off rate of pulverized coal is increased by reducing the length of a black fire head of flame, and the purpose of improving the reducing atmosphere in the rotary kiln is achieved. The invention provides an efficient reducing atmosphere detection mode, so that the reducing atmosphere control in the whole cement manufacturing process can be repeatedly operated, and the state can be accurately verified.
本发明涉及水泥制作技术领域，提供了一种改善后的旋窑内还原气氛控制方法。通过所述第一火星观察口，对五级下料管火星进行检查，来消除第一火星观察口中出现的火星情况；在通过第一火星观察口确认五级下料管无火星存在后，通过窑尾烟室缩口检查窑尾火星状态；检测从旋窑出来的熟料中Fe2+含量高低从而确定旋窑内还原气氛状态；据确定出的旋窑内的还原气氛状态，来调整外轴流风和/或内旋流风，以便借助火焰黑火头长度减小来提升煤粉燃尽率，从而达到旋窑内的还原气氛改善目的。本发明提出了一种高效的还原气氛检测方式，使得整个水泥制作过程中的还原气氛控制达到可重复操作，且能精准验证的状态。
Improved method for controlling reducing atmosphere in rotary kiln
一种改善后的旋窑内还原气氛控制方法
2023-07-04
Patent
Electronic Resource
Chinese
IPC:
F27B
Industrieöfen, Schachtöfen, Brennöfen, Retorten allgemein
,
FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL
/
C04B
Kalk
,
LIME
/
F23N
Regelung oder Steuerung der Verbrennung
,
REGULATING OR CONTROLLING COMBUSTION
/
F27D
Einzelheiten oder Zubehör für Industrieöfen, Schachtöfen, Brennöfen oder Retorten, soweit sie nicht auf eine Ofenart eingeschränkt sind
,
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
Rotary cement kiln control for reducing NOx emissions to atmosphere
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