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Deep self-denitration cement clinker calcining system with online reduction furnace and process
The invention discloses a deep self-denitration cement clinker calcining system and process with an online reduction furnace, the system comprises the online reduction furnace, the online reduction furnace is located between a kiln tail smoke chamber and a decomposing furnace, the online reduction furnace is provided with a raw material feeding point I and a fuel feeding point, the raw material feeding point I is located at the lower part of the online reduction furnace, and the fuel feeding point I is located at the lower part of the decomposing furnace; the fuel feeding point is positioned below the raw material feeding point I; the height of the online reduction furnace is greater than 10m; the tertiary air lower branch pipe is connected with the lower part of the online reduction furnace, the tertiary air upper branch pipe is connected with the lower part of the decomposition furnace, and a raw material feeding point II is arranged at an inlet of the tertiary air upper branch pipe; a bottom outlet of the penultimate-stage cyclone is respectively connected with a raw material feeding point I and a raw material feeding point II; and a combined gradient combustion environment of a strong oxygen-poor area and an oxygen-rich burnout area is formed in the online reduction furnace and the decomposing furnace. According to the invention, the height limit of a raw material feeding point is broken through, the denitration time of a strong oxygen-poor area is prolonged, the self-denitration efficiency is improved, and the raw material is fully decomposed.
本发明公开了一种带在线还原炉的深度自脱硝水泥熟料煅烧系统及工艺，该系统包括在线还原炉，在线还原炉位于窑尾烟室和分解炉之间，在线还原炉上设置有生料喂料点一和燃料喂料点，生料喂料点一位于在线还原炉下部，燃料喂料点位于生料喂料点一下方；在线还原炉高度大于10m；三次风下支管与在线还原炉下部连接，三次风上支管与分解炉下部连接，在三次风上支管入口处设置有生料喂料点二；次末级旋风筒的底部出口分别与生料喂料点一、生料喂料点二连接；使在线还原炉和分解炉内形成强贫氧区‑富氧燃烬区的组合梯度燃烧环境。本发明突破了生料喂料点高度限制，强贫氧区脱硝时间延长，实现自脱硝效率提升，同时实现生料充分分解。
Deep self-denitration cement clinker calcining system with online reduction furnace and process
The invention discloses a deep self-denitration cement clinker calcining system and process with an online reduction furnace, the system comprises the online reduction furnace, the online reduction furnace is located between a kiln tail smoke chamber and a decomposing furnace, the online reduction furnace is provided with a raw material feeding point I and a fuel feeding point, the raw material feeding point I is located at the lower part of the online reduction furnace, and the fuel feeding point I is located at the lower part of the decomposing furnace; the fuel feeding point is positioned below the raw material feeding point I; the height of the online reduction furnace is greater than 10m; the tertiary air lower branch pipe is connected with the lower part of the online reduction furnace, the tertiary air upper branch pipe is connected with the lower part of the decomposition furnace, and a raw material feeding point II is arranged at an inlet of the tertiary air upper branch pipe; a bottom outlet of the penultimate-stage cyclone is respectively connected with a raw material feeding point I and a raw material feeding point II; and a combined gradient combustion environment of a strong oxygen-poor area and an oxygen-rich burnout area is formed in the online reduction furnace and the decomposing furnace. According to the invention, the height limit of a raw material feeding point is broken through, the denitration time of a strong oxygen-poor area is prolonged, the self-denitration efficiency is improved, and the raw material is fully decomposed.
本发明公开了一种带在线还原炉的深度自脱硝水泥熟料煅烧系统及工艺，该系统包括在线还原炉，在线还原炉位于窑尾烟室和分解炉之间，在线还原炉上设置有生料喂料点一和燃料喂料点，生料喂料点一位于在线还原炉下部，燃料喂料点位于生料喂料点一下方；在线还原炉高度大于10m；三次风下支管与在线还原炉下部连接，三次风上支管与分解炉下部连接，在三次风上支管入口处设置有生料喂料点二；次末级旋风筒的底部出口分别与生料喂料点一、生料喂料点二连接；使在线还原炉和分解炉内形成强贫氧区‑富氧燃烬区的组合梯度燃烧环境。本发明突破了生料喂料点高度限制，强贫氧区脱硝时间延长，实现自脱硝效率提升，同时实现生料充分分解。
Deep self-denitration cement clinker calcining system with online reduction furnace and process
一种带在线还原炉的深度自脱硝水泥熟料煅烧系统及工艺
CHEN CHANGHUA (author) / LIN MINYAN (author) / PENG XUEPING (author) / YU WEIMIN (author)
2023-01-13
Patent
Electronic Resource
Chinese
IPC:
F27B
Industrieöfen, Schachtöfen, Brennöfen, Retorten allgemein
,
FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL
/
C04B
Kalk
,
LIME
/
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