JP5697077B2 - 脱硝触媒の劣化再生方法及び劣化再生システム - Google Patents
脱硝触媒の劣化再生方法及び劣化再生システム Download PDFInfo
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- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Description
Claims (14)
- 燃焼機器からの排ガスにアンモニア系物質を添加して脱硝触媒で窒素酸化物の分解を行う排ガス処理において、
前記燃焼機器の運転停止時に送風手段による送風と加熱手段による加熱とによって前記脱硝触媒の硫黄酸化物による劣化に対する再生処理を行う際に、前記脱硝触媒に対する再生処理時間を設定し、前記再生処理時間に基づいて、前記送風による前記脱硝触媒の再生時空塔速度と、前記加熱による前記脱硝触媒の再生温度と、を決定するとともに、前記再生時空塔速度を1000〜5000h-1の範囲に設定して前記再生処理を制御することを特徴とする脱硝触媒の劣化再生方法。 - 前記再生処理時間を短くするように設定すると前記再生温度を高くなるように決定することを特徴とする請求項1記載の脱硝触媒の劣化再生方法。
- 前記再生温度は、300℃以上600℃以下の範囲であることを特徴とする請求項1又は請求項2に記載の脱硝触媒の劣化再生方法。
- 前記加熱手段は、60℃/hを超える昇温速度で前記脱硝触媒を加熱することを特徴とする請求項1から請求項3のうちの1項に記載の脱硝触媒の劣化再生方法。
- 前記脱硝触媒は、ニオブ(Nb)を含むことを特徴とする請求項1から請求項4のうちの1項に記載の脱硝触媒の劣化再生方法。
- 燃焼機器と、
前記燃焼機器からの排ガスを排出する排ガス経路と、
前記排ガス経路に設けた脱硝触媒と、
前記燃焼機器と前記脱硝触媒の間の前記排ガス経路に設けた前記排ガスにアンモニア系物質を添加するアンモニア系物質添加手段と、
前記脱硝触媒に送風を行う送風手段と、
前記脱硝触媒を加熱する加熱手段と、
前記脱硝触媒に対する再生処理時間を設定し、前記再生処理時間に基づいて、前記送風による前記脱硝触媒の再生時空塔速度と、前記加熱による前記脱硝触媒の再生温度と、を決定するとともに、前記再生時空塔速度を1000〜5000h-1の範囲に設定して前記燃焼機器の運転停止時における前記脱硝触媒に対する再生処理を制御する再生制御手段と、
を備えたこと特徴とする脱硝触媒の劣化再生システム。 - 前記再生時空塔速度は、前記燃焼機器の運転時の排ガスによる運転時空塔速度よりも小さいことを特徴とする請求項6に記載の脱硝触媒の劣化再生システム。
- 前記送風手段は、前記加熱手段の上部に前記脱硝触媒を配置して前記加熱手段による加熱により自然ドラフト力を発生させ送風をおこなうことを特徴とする請求項6又は請求項7に記載の脱硝触媒の劣化再生システム。
- 前記燃焼機器は、ディーゼル機関であることを特徴とする請求項6から請求項8のうちの1項に記載の脱硝触媒の劣化再生システム。
- 前記送風手段は、前記ディーゼル機関の始動に用いられる手段又は前記ディーゼル機関に装備された手段であることを特徴とする請求項9に記載の脱硝触媒の劣化再生システム。
- 前記脱硝触媒は、ニオブ(Nb)を含むことを特徴とする請求項6から請求項10のうちの1項に記載の脱硝触媒の劣化再生システム。
- 前記触媒の劣化予測手段をさらに備え、前記劣化予測手段の予測値に基づいて再生処理を実施することを特徴とする請求項6から請求項11のうちの1項に記載の脱硝触媒の劣化再生システム。
- 前記再生制御手段は、前記脱硝触媒の再生処理時間を複数設定可能であることを特徴とする請求項6から請求項12のうちの1項に記載の脱硝触媒の劣化再生システム。
- 前記燃焼機器の運転停止後、1時間以内に前記脱硝触媒の再生処理を開始することを特徴とする請求項6から請求項13のうちの1項に記載の脱硝触媒の劣化再生システム。
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CN104667746A (zh) * | 2015-01-14 | 2015-06-03 | 北京贞吉环保科技有限公司 | 一种低温循环再生脱硝催化装置 |
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JP6400379B2 (ja) * | 2014-08-08 | 2018-10-03 | 三菱日立パワーシステムズ株式会社 | 燃焼排ガスの脱硝方法 |
CN104801300A (zh) * | 2015-03-26 | 2015-07-29 | 宁波远翔节能环保技术有限公司 | MnOx-Ce02类氧化物催化剂与过滤器的制备方法以及尾气处理*** |
DK179038B1 (en) * | 2015-11-02 | 2017-09-11 | Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland | A two-stroke internal combustion engine with a SCR reactor located downstream of the exhaust gas receiver |
CN107649186A (zh) * | 2017-11-14 | 2018-02-02 | 上海泰欣环境工程股份有限公司 | 一种scr脱硝催化剂在线再生技术 |
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JPS52106362A (en) * | 1976-03-04 | 1977-09-06 | Hitachi Ltd | Decomposition of nitrogen oxides by catalytic reduction |
JPS5428789A (en) * | 1977-08-09 | 1979-03-03 | Jgc Corp | Process for reproducing low-temperature denitrating catalyst |
JPS5452692A (en) * | 1977-10-05 | 1979-04-25 | Nippon Steel Corp | Catalyst for removing nitrogen oxides in exhaust gas |
JPS54132467A (en) * | 1978-04-06 | 1979-10-15 | Jgc Corp | Automatically operating method for catalyst- regeneration process in exhaust gas denitration process |
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