Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
CEMENT FIRING DEVICE AND CEMENT KILN EXHAUST GAS DENITRIFICATION METHOD
[Problem] To reduce the NOx concentration in cement kiln exhaust gas. [Solution] A cement firing device 1 is equipped with a plurality of denitrification burners 14 (14A to 14D) which are provided atthe kiln inlet 4 of a cement kiln 5 and inject, into the kiln inlet, combustion air and a fuel F3 in an overall amount of between 50% and 100% of the fuel F2 being burned in a precalcination oven 3 installed on the cement kiln. Increasing the fuel injected into the kiln inlet increases the amount of reducing agent, while causing the influence from the kiln inlet O2 to be mostly lost, allowing theNOx concentration in the kiln exhaust gas to be reduced further. The provision of a plurality of denitrification burners allows for a reduction in the injection amount per denitrification burner, theprevention of coating adhesion and fuel-to-fuel collision, and a higher probability of the injected fuel mixing with the kiln exhaust gas flowing in the kiln inlet and colliding with the NOx in the kiln exhaust gas. Providing the plurality of denitrification burners in the same horizontal plane further increases the probability of colliding with the NOx in the kiln exhaust gas.
本发明的课题在于减少水泥窑排气中的NOx浓度。水泥烧成装置1，其具备：在水泥窑5的窑尾4设置多个、向窑尾内以全体计吹入在附设于水泥窑的预烧炉3中燃烧的燃料F2的50％以上且100％以下的量的燃料F3和燃烧用空气的脱硝用燃烧器14(14A～14D)。通过增加吹入窑尾的燃料，从而还原剂量增多，同时几乎不再受窑尾O2的影响，能够进一步减小窑排气中的NOx浓度。通过设置多个脱硝用燃烧器，从而能够减少每一个脱硝用燃烧器的吹入量，防止涂层的附着、燃料之间的碰撞，同时能够提高吹入的燃料与在窑尾流动的窑排气的混合和与窑排气中的NOx的碰撞概率。通过将多个脱硝用燃烧器设置在同一水平面上，从而与窑排气中的NOx的碰撞概率进一步提高。
CEMENT FIRING DEVICE AND CEMENT KILN EXHAUST GAS DENITRIFICATION METHOD
[Problem] To reduce the NOx concentration in cement kiln exhaust gas. [Solution] A cement firing device 1 is equipped with a plurality of denitrification burners 14 (14A to 14D) which are provided atthe kiln inlet 4 of a cement kiln 5 and inject, into the kiln inlet, combustion air and a fuel F3 in an overall amount of between 50% and 100% of the fuel F2 being burned in a precalcination oven 3 installed on the cement kiln. Increasing the fuel injected into the kiln inlet increases the amount of reducing agent, while causing the influence from the kiln inlet O2 to be mostly lost, allowing theNOx concentration in the kiln exhaust gas to be reduced further. The provision of a plurality of denitrification burners allows for a reduction in the injection amount per denitrification burner, theprevention of coating adhesion and fuel-to-fuel collision, and a higher probability of the injected fuel mixing with the kiln exhaust gas flowing in the kiln inlet and colliding with the NOx in the kiln exhaust gas. Providing the plurality of denitrification burners in the same horizontal plane further increases the probability of colliding with the NOx in the kiln exhaust gas.
本发明的课题在于减少水泥窑排气中的NOx浓度。水泥烧成装置1，其具备：在水泥窑5的窑尾4设置多个、向窑尾内以全体计吹入在附设于水泥窑的预烧炉3中燃烧的燃料F2的50％以上且100％以下的量的燃料F3和燃烧用空气的脱硝用燃烧器14(14A～14D)。通过增加吹入窑尾的燃料，从而还原剂量增多，同时几乎不再受窑尾O2的影响，能够进一步减小窑排气中的NOx浓度。通过设置多个脱硝用燃烧器，从而能够减少每一个脱硝用燃烧器的吹入量，防止涂层的附着、燃料之间的碰撞，同时能够提高吹入的燃料与在窑尾流动的窑排气的混合和与窑排气中的NOx的碰撞概率。通过将多个脱硝用燃烧器设置在同一水平面上，从而与窑排气中的NOx的碰撞概率进一步提高。
CEMENT FIRING DEVICE AND CEMENT KILN EXHAUST GAS DENITRIFICATION METHOD
水泥烧成装置和水泥窑排气的脱硝方法
YAMAMOTO YASUSHI (Autor:in) / HIROSE TOSHIAKI (Autor:in)
02.04.2021
Patent
Elektronische Ressource
Chinesisch
CEMENT FIRING DEVICE AND CEMENT KILN EXHAUST GAS DENITRIFICATION METHOD
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