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A platform for research: civil engineering, architecture and urbanism
Method for recovering carbon dioxide through oxygen-enriched combustion-supporting limestone calcination
The invention discloses a method for recovering carbon dioxide through oxygen-enriched combustion-supporting limestone calcination. Limestone is crushed, screened and then fed into a calcining furnace to be calcined so as to generate quick lime, and the quick lime is crushed to prepare a quick lime product. After being gasified, LNG is mixed with an oxygen-enriched air pipeline and fed into the calcining furnace to be combusted. Gas exhausted by the calcining furnace is subjected to heat exchange of a heat exchanger, preliminary dust removal and cooling of a spray tower and water vapor adsorption of a packed tower in sequence, then the obtained gas is subjected to heat exchange and cooling of low-temperature heat exchanger, dust removal of a bag-type dust remover and multi-stage compression of a compressor in sequence, liquid carbon dioxide is generated, and finally gas-liquid separation is conducted to obtain the liquid carbon dioxide with the purity being 98% or above. According to the method, high-quality quick lime and liquid carbon dioxide with the purity reaching 98% or above can be produced at the same time, carbon dioxide gas and other gas generated by limestone calcination are liquefied and separated at the normal temperature, and the system is simple in structure, continuous, convenient to operate, capable of saving energy consumption and suitable for large-scale continuous production.
本发明公开了一种富氧助燃煅烧石灰石回收二氧化碳的方法。石灰石经过破碎筛分后送入煅烧炉中煅烧，生成生石灰，生石灰经过粉碎制成生石灰产品。LNG经过气化后，与富氧空气管道混合送入煅烧炉中燃烧。煅烧炉排出的气体依次经过换热器换热、喷淋塔初步除尘降温、填料塔吸附水蒸汽，然后所得气体再依次经过低温换热器换热降温、布袋除尘器除尘和压缩机多级压缩，生成液态二氧化碳，最后进行气液分离得到纯度98％以上的液态二氧化碳。本发明方法能同时生产高品质生石灰和纯度达98％以上的液态二氧化碳，实现常温液化分离煅烧石灰石产生的二氧化碳气体及其它气体，系统结构简单、连续，操作方便，节约能耗，适合规模连续性生产。
Method for recovering carbon dioxide through oxygen-enriched combustion-supporting limestone calcination
The invention discloses a method for recovering carbon dioxide through oxygen-enriched combustion-supporting limestone calcination. Limestone is crushed, screened and then fed into a calcining furnace to be calcined so as to generate quick lime, and the quick lime is crushed to prepare a quick lime product. After being gasified, LNG is mixed with an oxygen-enriched air pipeline and fed into the calcining furnace to be combusted. Gas exhausted by the calcining furnace is subjected to heat exchange of a heat exchanger, preliminary dust removal and cooling of a spray tower and water vapor adsorption of a packed tower in sequence, then the obtained gas is subjected to heat exchange and cooling of low-temperature heat exchanger, dust removal of a bag-type dust remover and multi-stage compression of a compressor in sequence, liquid carbon dioxide is generated, and finally gas-liquid separation is conducted to obtain the liquid carbon dioxide with the purity being 98% or above. According to the method, high-quality quick lime and liquid carbon dioxide with the purity reaching 98% or above can be produced at the same time, carbon dioxide gas and other gas generated by limestone calcination are liquefied and separated at the normal temperature, and the system is simple in structure, continuous, convenient to operate, capable of saving energy consumption and suitable for large-scale continuous production.
本发明公开了一种富氧助燃煅烧石灰石回收二氧化碳的方法。石灰石经过破碎筛分后送入煅烧炉中煅烧，生成生石灰，生石灰经过粉碎制成生石灰产品。LNG经过气化后，与富氧空气管道混合送入煅烧炉中燃烧。煅烧炉排出的气体依次经过换热器换热、喷淋塔初步除尘降温、填料塔吸附水蒸汽，然后所得气体再依次经过低温换热器换热降温、布袋除尘器除尘和压缩机多级压缩，生成液态二氧化碳，最后进行气液分离得到纯度98％以上的液态二氧化碳。本发明方法能同时生产高品质生石灰和纯度达98％以上的液态二氧化碳，实现常温液化分离煅烧石灰石产生的二氧化碳气体及其它气体，系统结构简单、连续，操作方便，节约能耗，适合规模连续性生产。
Method for recovering carbon dioxide through oxygen-enriched combustion-supporting limestone calcination
一种富氧助燃煅烧石灰石回收二氧化碳的方法
DOU MINGYUAN (author) / YANG JING (author) / ZOU SHUAI (author) / LI HAOMING (author) / DENG FUKANG (author) / LI KANGCHUN (author) / HUANG FUCHUAN (author)
2021-06-08
Patent
Electronic Resource
Chinese
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