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Lime kiln system for independent circulation of carbon-rich flue gas
The invention discloses a lime kiln system for independent circulation of carbon-rich flue gas, which is characterized in that an indirect heat exchange mechanism of heat storage cold flue gas and cooling air is arranged between vertical hearths of a double-hearth lime kiln, so that the cooling air from a cooling section and calcining flue gas from a calcining section are separated from a connecting channel; on one hand, cooling airflow can be prevented from converging into calcining flue gas to dilute the concentration of carbon dioxide in the flue gas, on the other hand, high-temperature cooling air is subjected to waste heat absorption through heat storage cold flue gas and then returns to a combustion chamber for recycling, and cyclic enrichment of carbon dioxide and cyclic utilization of cooling waste heat can be achieved while the product quality is not affected; the device has the advantages of good production continuity, high production efficiency, strong system stability, high concentration of carbon dioxide in flue gas, easiness in trapping, low equipment maintenance cost and the like.
本发明公开了一种富碳烟气独立循环的石灰窑系统，该系统通过在双膛石灰窑的竖膛之间设置蓄热冷烟气与冷却空气的间接换热机制，将来自冷却段的冷却空气与来自煅烧段的煅烧烟气从连接通道处分离，一方面可以避免冷却气流汇入煅烧烟气中稀释烟气中二氧化碳浓度，另一方面通过蓄热冷烟气对高温冷却空气进行余热吸收后返回至燃烧膛循环使用，可在不影响产品质量的同时实现二氧化碳的循环富集以及冷却余热的循环利用，具有生产连续性好、生产效率高、系统稳定强、烟气二氧化碳浓度高易捕集以及设备维护成本低等优点。
Lime kiln system for independent circulation of carbon-rich flue gas
The invention discloses a lime kiln system for independent circulation of carbon-rich flue gas, which is characterized in that an indirect heat exchange mechanism of heat storage cold flue gas and cooling air is arranged between vertical hearths of a double-hearth lime kiln, so that the cooling air from a cooling section and calcining flue gas from a calcining section are separated from a connecting channel; on one hand, cooling airflow can be prevented from converging into calcining flue gas to dilute the concentration of carbon dioxide in the flue gas, on the other hand, high-temperature cooling air is subjected to waste heat absorption through heat storage cold flue gas and then returns to a combustion chamber for recycling, and cyclic enrichment of carbon dioxide and cyclic utilization of cooling waste heat can be achieved while the product quality is not affected; the device has the advantages of good production continuity, high production efficiency, strong system stability, high concentration of carbon dioxide in flue gas, easiness in trapping, low equipment maintenance cost and the like.
本发明公开了一种富碳烟气独立循环的石灰窑系统，该系统通过在双膛石灰窑的竖膛之间设置蓄热冷烟气与冷却空气的间接换热机制，将来自冷却段的冷却空气与来自煅烧段的煅烧烟气从连接通道处分离，一方面可以避免冷却气流汇入煅烧烟气中稀释烟气中二氧化碳浓度，另一方面通过蓄热冷烟气对高温冷却空气进行余热吸收后返回至燃烧膛循环使用，可在不影响产品质量的同时实现二氧化碳的循环富集以及冷却余热的循环利用，具有生产连续性好、生产效率高、系统稳定强、烟气二氧化碳浓度高易捕集以及设备维护成本低等优点。
Lime kiln system for independent circulation of carbon-rich flue gas
一种富碳烟气独立循环的石灰窑系统
ZHU RONGJIA (author) / LI QIAN (author) / ZHOU HAOYU (author) / WEI JINCHAO (author)
2024-12-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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