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Cement production method for reducing carbon dioxide emission based on catalytic conversion utilization
The invention discloses a cement production method for reducing carbon dioxide emission based on catalytic conversion utilization, which specifically comprises the following steps: feeding a certain amount of methane gas into a preheating pipeline which is positioned above a rotary kiln and is a certain distance away from the upper surface of the rotary kiln, preheating to 200-260 DEG C, and returning the methane gas to the kiln tail from the kiln tail to the kiln head; the method comprises the following steps: after flue gas discharged from an outlet in the top of a preheater adopting an oxy-fuel combustion cement production process is subjected to desulfurization, denitration and preliminary dust removal, selecting 20-50% of gas and fully mixing the gas with preheated methane gas; introducing the mixed gas into a mixed gas pipeline positioned in the tertiary air pipe, and preheating the mixed gas to a reaction temperature from the kiln tail to the kiln head; and introducing into a catalytic reactor, carrying out methane steam reforming and methane carbon dioxide reforming reaction to generate H2 and CO, introducing part of H2 and CO into a decomposing furnace, and introducing part of H2 and CO into a kiln head combustor. The CO2 emission can be reduced by more than 30%, the energy consumption is low, a high-pressure environment is not needed, the technological process is simple, and the method is suitable for large-scale popularization.
本发明公开了一种基于催化转化利用降低二氧化碳排放的水泥生产方法，具体为：将一定量甲烷气体送入位于回转窑上方并距回转窑上表面一定距离的预热管路中，预热至200～260℃，甲烷气体从窑尾至窑头，再折返至窑尾；将采用全氧燃烧水泥生产工艺的预热器顶部出口排出的烟气经脱硫、脱硝和初步除尘后，选取20～50％的气体与预热后的甲烷气体充分混合之后；通入位于三次风管内的混合气体管道，混合气体从窑尾到窑头，预热至反应温度后；通入催化反应器内，发生甲烷水蒸气重整和甲烷二氧化碳重整反应，生成H2和CO，部分通入分解炉，部分通入窑头燃烧器。本发明可降低CO2排放量30％以上，能耗较低，无需高压环境，工艺过程简单，适合大规模推广。
Cement production method for reducing carbon dioxide emission based on catalytic conversion utilization
The invention discloses a cement production method for reducing carbon dioxide emission based on catalytic conversion utilization, which specifically comprises the following steps: feeding a certain amount of methane gas into a preheating pipeline which is positioned above a rotary kiln and is a certain distance away from the upper surface of the rotary kiln, preheating to 200-260 DEG C, and returning the methane gas to the kiln tail from the kiln tail to the kiln head; the method comprises the following steps: after flue gas discharged from an outlet in the top of a preheater adopting an oxy-fuel combustion cement production process is subjected to desulfurization, denitration and preliminary dust removal, selecting 20-50% of gas and fully mixing the gas with preheated methane gas; introducing the mixed gas into a mixed gas pipeline positioned in the tertiary air pipe, and preheating the mixed gas to a reaction temperature from the kiln tail to the kiln head; and introducing into a catalytic reactor, carrying out methane steam reforming and methane carbon dioxide reforming reaction to generate H2 and CO, introducing part of H2 and CO into a decomposing furnace, and introducing part of H2 and CO into a kiln head combustor. The CO2 emission can be reduced by more than 30%, the energy consumption is low, a high-pressure environment is not needed, the technological process is simple, and the method is suitable for large-scale popularization.
本发明公开了一种基于催化转化利用降低二氧化碳排放的水泥生产方法，具体为：将一定量甲烷气体送入位于回转窑上方并距回转窑上表面一定距离的预热管路中，预热至200～260℃，甲烷气体从窑尾至窑头，再折返至窑尾；将采用全氧燃烧水泥生产工艺的预热器顶部出口排出的烟气经脱硫、脱硝和初步除尘后，选取20～50％的气体与预热后的甲烷气体充分混合之后；通入位于三次风管内的混合气体管道，混合气体从窑尾到窑头，预热至反应温度后；通入催化反应器内，发生甲烷水蒸气重整和甲烷二氧化碳重整反应，生成H2和CO，部分通入分解炉，部分通入窑头燃烧器。本发明可降低CO2排放量30％以上，能耗较低，无需高压环境，工艺过程简单，适合大规模推广。
Cement production method for reducing carbon dioxide emission based on catalytic conversion utilization
一种基于催化转化利用降低二氧化碳排放的水泥生产方法
ZHAO LIN (author) / DAI ZHONGYUAN (author) / YANG HUANYING (author) / ZHOU WEI (author) / PENG XUEPING (author) / FAN YULIN (author)
2023-01-24
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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