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A platform for research: civil engineering, architecture and urbanism
Dry method cement kiln tail flue gas desulfurization method
The invention discloses a dry method cement kiln tail flue gas desulfurization method. A kiln tail bag type dust collector, a multi-stage preheater and a kiln tail smoke exhaust pipeline connected with the kiln tail bag type dust collector and the multi-stage preheater of an existing cement kiln are utilized. The filtering air speed of the kiln tail bag type dust collector is controlled to be lessthan 2.1 m/min, ammonia water or a urea solution is sprayed into the multi-stage preheater or the smoke exhaust pipeline, and an aqueous solution containing a transition metal compound is sprayed into the smoke exhaust pipeline, polar molecules in an ammonia water or urea solution are used as a precursor to quickly absorb SO2 and generate NH4HSO3, the sodium hydroxide and O2 are rapidly convertedinto NH4HSO4 under the action of an aqueous solution, the generated NH4HSO4 has viscosity, easily adsorbs CaCO3 and CaO dust and reacts, NH3 is replaced, the replaced NH3 continues to serve as the precursor to participate in the reaction, and the generated stable CaSO4 dust is collected in front of the bag type dust collector and enters a raw material silo together with raw materials. The methodhas the advantages of low cost, high reliability, high desulfurization efficiency and the like.
一种干法水泥窑窑尾烟气脱硫方法，利用现有水泥窑的窑尾袋式收尘器、多级预热器以及两者相连的窑尾烟气排烟管道，控制窑尾袋式收尘器过滤风速小于2.1m/min，向多级预热器或排烟管道中喷入氨水或尿素溶液，同时向排烟管道喷入含有过渡金属化合物的水剂，利用氨水或尿素溶液中极性分子作为前驱体快速吸收SO并生成NHHSO，在水剂作用下快速和O转化为NHHSO，生成的NHHSO具有粘性，容易吸附CaCO、CaO粉尘并发生反应，置换出NH，置换出的NH继续作为前驱体参与反应，而生成稳定的CaSO粉尘在袋式收尘器前收集并和生料一起进入生料库。本发明具有低成本、高可靠性、高脱硫效率等优点。
Dry method cement kiln tail flue gas desulfurization method
The invention discloses a dry method cement kiln tail flue gas desulfurization method. A kiln tail bag type dust collector, a multi-stage preheater and a kiln tail smoke exhaust pipeline connected with the kiln tail bag type dust collector and the multi-stage preheater of an existing cement kiln are utilized. The filtering air speed of the kiln tail bag type dust collector is controlled to be lessthan 2.1 m/min, ammonia water or a urea solution is sprayed into the multi-stage preheater or the smoke exhaust pipeline, and an aqueous solution containing a transition metal compound is sprayed into the smoke exhaust pipeline, polar molecules in an ammonia water or urea solution are used as a precursor to quickly absorb SO2 and generate NH4HSO3, the sodium hydroxide and O2 are rapidly convertedinto NH4HSO4 under the action of an aqueous solution, the generated NH4HSO4 has viscosity, easily adsorbs CaCO3 and CaO dust and reacts, NH3 is replaced, the replaced NH3 continues to serve as the precursor to participate in the reaction, and the generated stable CaSO4 dust is collected in front of the bag type dust collector and enters a raw material silo together with raw materials. The methodhas the advantages of low cost, high reliability, high desulfurization efficiency and the like.
一种干法水泥窑窑尾烟气脱硫方法，利用现有水泥窑的窑尾袋式收尘器、多级预热器以及两者相连的窑尾烟气排烟管道，控制窑尾袋式收尘器过滤风速小于2.1m/min，向多级预热器或排烟管道中喷入氨水或尿素溶液，同时向排烟管道喷入含有过渡金属化合物的水剂，利用氨水或尿素溶液中极性分子作为前驱体快速吸收SO并生成NHHSO，在水剂作用下快速和O转化为NHHSO，生成的NHHSO具有粘性，容易吸附CaCO、CaO粉尘并发生反应，置换出NH，置换出的NH继续作为前驱体参与反应，而生成稳定的CaSO粉尘在袋式收尘器前收集并和生料一起进入生料库。本发明具有低成本、高可靠性、高脱硫效率等优点。
Dry method cement kiln tail flue gas desulfurization method
一种干法水泥窑窑尾烟气脱硫方法
HAN JIANYING (author) / CHENG GONG (author) / HAN JIANPING (author) / LIU ENHUI (author) / SUN RUIXUE (author) / DING YANCHUN (author)
2020-07-10
Patent
Electronic Resource
Chinese
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