A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
MERCURY RECOVERY DEVICE AND RECOVERY METHOD
PROBLEM TO BE SOLVED: To efficiently recover mercury at low cost from cement kiln exhaust gas.SOLUTION: A mercury recovery device 1 comprises a chlorine bypass system having an extraction device 4 for extracting while cooling a part G1 of combustion exhaust gas from a kiln exhaust gas flow passage up to reaching the lowest stage cyclone of a preheater from a kiln tail of a cement kiln, a classifier 5 for separating extraction gas G3 by the extraction device into coarse powder D1, fine powder D2 and gas G4, a cooler 6 for cooling exhaust gas of the classifier and a dust collector 7 for recovering the fine powder D2 from exhaust gas G5 of the cooler and an introduction device 13 for introducing gas KG of including volatile mercury up to the upstream side of the dust collector from the extraction device of the chlorine bypass system. Gas of volatilizing mercury by heating dust removed from a cement kiln exhaust gas, can be introduced as the gas of including the volatile mercury.SELECTED DRAWING: Figure 1
【課題】セメントキルン排ガス等から低コストで効率よく水銀を回収する。【解決手段】セメントキルンの窯尻からプレヒータの最下段サイクロンに至るまでのキルン排ガス流路より燃焼排ガスの一部Ｇ１を冷却しながら抽気する抽気装置４と、抽気装置による抽気ガスＧ３を、粗粉Ｄ１と、微粉Ｄ２及びガスＧ４とに分離する分級機５と、分級機の排ガスを冷却する冷却器６と、冷却器の排ガスＧ５から微粉Ｄ２を回収する集塵機７とを備える塩素バイパスシステムと、塩素バイパスシステムの抽気装置から集塵機の上流側までの間に、揮発水銀を含むガスＫＧを導入する導入装置１３とを備える水銀回収装置１。揮発水銀を含むガスとして、セメントキルン排ガスから除塵したダストを加熱して水銀を揮発させたガスを導入することができる。【選択図】図１
MERCURY RECOVERY DEVICE AND RECOVERY METHOD
PROBLEM TO BE SOLVED: To efficiently recover mercury at low cost from cement kiln exhaust gas.SOLUTION: A mercury recovery device 1 comprises a chlorine bypass system having an extraction device 4 for extracting while cooling a part G1 of combustion exhaust gas from a kiln exhaust gas flow passage up to reaching the lowest stage cyclone of a preheater from a kiln tail of a cement kiln, a classifier 5 for separating extraction gas G3 by the extraction device into coarse powder D1, fine powder D2 and gas G4, a cooler 6 for cooling exhaust gas of the classifier and a dust collector 7 for recovering the fine powder D2 from exhaust gas G5 of the cooler and an introduction device 13 for introducing gas KG of including volatile mercury up to the upstream side of the dust collector from the extraction device of the chlorine bypass system. Gas of volatilizing mercury by heating dust removed from a cement kiln exhaust gas, can be introduced as the gas of including the volatile mercury.SELECTED DRAWING: Figure 1
【課題】セメントキルン排ガス等から低コストで効率よく水銀を回収する。【解決手段】セメントキルンの窯尻からプレヒータの最下段サイクロンに至るまでのキルン排ガス流路より燃焼排ガスの一部Ｇ１を冷却しながら抽気する抽気装置４と、抽気装置による抽気ガスＧ３を、粗粉Ｄ１と、微粉Ｄ２及びガスＧ４とに分離する分級機５と、分級機の排ガスを冷却する冷却器６と、冷却器の排ガスＧ５から微粉Ｄ２を回収する集塵機７とを備える塩素バイパスシステムと、塩素バイパスシステムの抽気装置から集塵機の上流側までの間に、揮発水銀を含むガスＫＧを導入する導入装置１３とを備える水銀回収装置１。揮発水銀を含むガスとして、セメントキルン排ガスから除塵したダストを加熱して水銀を揮発させたガスを導入することができる。【選択図】図１
MERCURY RECOVERY DEVICE AND RECOVERY METHOD
水銀回収装置及び回収方法
HAYASHI KOTARO (author) / WADACHI HITOSHI (author)
2017-04-06
Patent
Electronic Resource
Japanese