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CHLORINE BYPASS SYSTEM AND METHOD FOR TREATING CEMENT KILN EXTRACTION GAS
PROBLEM TO BE SOLVED: To secure a desired chlorine removal rate in a chlorine bypass system where an extracted cement kiln exhaust gas is cooled over two stages.SOLUTION: Provided is a chlorine bypass system 1 comprising: a probe 2 where, while, from a kiln exhaust gas flow passage from the tail part of a cement kiln to the lowermost cyclone of a preheater, a part G1 of a combustion exhaust gas is exhausted, it is subjected to primary cooling at 400 to 600°C; the first cooler 3 where the exhaust gas G2 subjected to extraction and cooling with the probe is subjected to secondary cooling at 300 to 400°C; a classifier 4 where the exhaust gas subjected to the secondary cooling with the first cooler is classified into coarse powder D1 and fine powder D2, and the coarse powder is returned to the cement kiln system; the second cooler 5 where the fine powder-containing exhaust gas G4 classified with a classifier is subjected to final cooling at 100 to 200°C; and a dust collector 6 where the fine powder D4 is recovered from the exhaust gas G5 cooled with the second cooler, and the second cooling in the first cooler is performed within 0.15 s from the start of the primary cooling in the probe.SELECTED DRAWING: Figure 1
【課題】抽気したセメントキルン排ガスを二段階にわたって冷却する塩素バイパスシステムにおいて、所望の塩素除去率を確保する。【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を抽気しながら４００℃以上６００℃以下に一次冷却するプローブ２と、プローブで抽気し冷却された排ガスＧ２を３００℃以上４００℃以下に二次冷却する第１の冷却器３と、第１の冷却器で二次冷却された排ガスを粗粉Ｄ１と微粉Ｄ２とに分級して粗粉をセメントキルン系へ戻す分級機４と、分級機で分級された微粉を含む排ガスＧ４を１００℃以上２００℃以下に最終冷却する第２の冷却器５と、第２の冷却器で冷却された排ガスＧ５から微粉Ｄ４を回収する集塵機６とを備え、第１の冷却器における二次冷却を、プローブにおける一次冷却の開始から０．１５秒以内に行う塩素バイパスシステム１。【選択図】図１
CHLORINE BYPASS SYSTEM AND METHOD FOR TREATING CEMENT KILN EXTRACTION GAS
PROBLEM TO BE SOLVED: To secure a desired chlorine removal rate in a chlorine bypass system where an extracted cement kiln exhaust gas is cooled over two stages.SOLUTION: Provided is a chlorine bypass system 1 comprising: a probe 2 where, while, from a kiln exhaust gas flow passage from the tail part of a cement kiln to the lowermost cyclone of a preheater, a part G1 of a combustion exhaust gas is exhausted, it is subjected to primary cooling at 400 to 600°C; the first cooler 3 where the exhaust gas G2 subjected to extraction and cooling with the probe is subjected to secondary cooling at 300 to 400°C; a classifier 4 where the exhaust gas subjected to the secondary cooling with the first cooler is classified into coarse powder D1 and fine powder D2, and the coarse powder is returned to the cement kiln system; the second cooler 5 where the fine powder-containing exhaust gas G4 classified with a classifier is subjected to final cooling at 100 to 200°C; and a dust collector 6 where the fine powder D4 is recovered from the exhaust gas G5 cooled with the second cooler, and the second cooling in the first cooler is performed within 0.15 s from the start of the primary cooling in the probe.SELECTED DRAWING: Figure 1
【課題】抽気したセメントキルン排ガスを二段階にわたって冷却する塩素バイパスシステムにおいて、所望の塩素除去率を確保する。【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を抽気しながら４００℃以上６００℃以下に一次冷却するプローブ２と、プローブで抽気し冷却された排ガスＧ２を３００℃以上４００℃以下に二次冷却する第１の冷却器３と、第１の冷却器で二次冷却された排ガスを粗粉Ｄ１と微粉Ｄ２とに分級して粗粉をセメントキルン系へ戻す分級機４と、分級機で分級された微粉を含む排ガスＧ４を１００℃以上２００℃以下に最終冷却する第２の冷却器５と、第２の冷却器で冷却された排ガスＧ５から微粉Ｄ４を回収する集塵機６とを備え、第１の冷却器における二次冷却を、プローブにおける一次冷却の開始から０．１５秒以内に行う塩素バイパスシステム１。【選択図】図１
CHLORINE BYPASS SYSTEM AND METHOD FOR TREATING CEMENT KILN EXTRACTION GAS
塩素バイパスシステム及びセメントキルン抽気ガスの処理方法
WADA HAJIME (author)
2017-03-16
Patent
Electronic Resource
Japanese
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