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A platform for research: civil engineering, architecture and urbanism
TREATMENT DEVICE AND METHOD OF CEMENT KILN EXHAUST GAS
PROBLEM TO BE SOLVED: To efficiently remove mercury at low cost from flue gas to be emitted from cement kiln.SOLUTION: A treatment device 1 of cement kiln exhaust gas comprises: a dust collector 2 which collects dust contained in exhaust gas of cement kiln; a dust feeder 11 which supplies the dust to a gas duct on an upstream side of a solid-gas separation device 7 which collects fine powder D2 in a chlorine bypass attached to a cement firing facility in order to directly heat the dust collected by the dust collector; and a mercury recovery device 19 which recovers mercury vaporized by heating. Since temperature of extraction gas flowing in the gas duct on the upstream side of the solid-gas separation device is higher than that of chlorine bypass exhaust gas, mercury recovery ratio can be raised by more certainly vaporizing the mercury in the collected dust. A chlorine gas injection device 13 which injects chlorine gas or a hydrogen chloride injection device which injects hydrogen chloride to the gas duct on the upstream side of the solid-gas separation device may be provided, and conversion of metal mercury in the dust into mercury chloride can be promoted.
【課題】セメントキルンから排出される燃焼排ガスから水銀を低コストで効率よく除去する。【解決手段】セメントキルンの排ガスに含まれるダストを集塵する集塵装置２と、集塵装置で集塵されたダストを直接加熱するために、該ダストを、セメント焼成設備に付設された塩素バイパスにおける微粉Ｄ２を集塵する固気分離装置７の上流側のガスダクトに供給するダスト供給装置１１と、加熱によって揮発した水銀を回収する水銀回収装置１９とを備えるセメントキルン排ガスの処理装置１。固気分離装置の上流側のガスダクトを流れる抽気ガスの温度は、塩素バイパス排ガスよりも高いため、集塵ダスト中の水銀をより確実に揮発させて水銀回収率を向上させることができる。固気分離装置の上流側のガスダクトに塩素ガスを注入する塩素ガス注入装置１３又は塩化水素を注入する塩化水素注入装置を設けてもよく、ダスト中の金属水銀の塩化水銀への転化を促進させることができる。【選択図】図１
TREATMENT DEVICE AND METHOD OF CEMENT KILN EXHAUST GAS
PROBLEM TO BE SOLVED: To efficiently remove mercury at low cost from flue gas to be emitted from cement kiln.SOLUTION: A treatment device 1 of cement kiln exhaust gas comprises: a dust collector 2 which collects dust contained in exhaust gas of cement kiln; a dust feeder 11 which supplies the dust to a gas duct on an upstream side of a solid-gas separation device 7 which collects fine powder D2 in a chlorine bypass attached to a cement firing facility in order to directly heat the dust collected by the dust collector; and a mercury recovery device 19 which recovers mercury vaporized by heating. Since temperature of extraction gas flowing in the gas duct on the upstream side of the solid-gas separation device is higher than that of chlorine bypass exhaust gas, mercury recovery ratio can be raised by more certainly vaporizing the mercury in the collected dust. A chlorine gas injection device 13 which injects chlorine gas or a hydrogen chloride injection device which injects hydrogen chloride to the gas duct on the upstream side of the solid-gas separation device may be provided, and conversion of metal mercury in the dust into mercury chloride can be promoted.
【課題】セメントキルンから排出される燃焼排ガスから水銀を低コストで効率よく除去する。【解決手段】セメントキルンの排ガスに含まれるダストを集塵する集塵装置２と、集塵装置で集塵されたダストを直接加熱するために、該ダストを、セメント焼成設備に付設された塩素バイパスにおける微粉Ｄ２を集塵する固気分離装置７の上流側のガスダクトに供給するダスト供給装置１１と、加熱によって揮発した水銀を回収する水銀回収装置１９とを備えるセメントキルン排ガスの処理装置１。固気分離装置の上流側のガスダクトを流れる抽気ガスの温度は、塩素バイパス排ガスよりも高いため、集塵ダスト中の水銀をより確実に揮発させて水銀回収率を向上させることができる。固気分離装置の上流側のガスダクトに塩素ガスを注入する塩素ガス注入装置１３又は塩化水素を注入する塩化水素注入装置を設けてもよく、ダスト中の金属水銀の塩化水銀への転化を促進させることができる。【選択図】図１
TREATMENT DEVICE AND METHOD OF CEMENT KILN EXHAUST GAS
セメントキルン排ガスの処理装置及び処理方法
WADACHI HITOSHI (author) / YOSHIKAWA TOMOHISA (author) / SUGAYA HIDEYUKI (author)
2015-12-03
Patent
Electronic Resource
Japanese
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