JP5754000B2 - 脱硝触媒の劣化予測方法、劣化対策方法、劣化対策システム及び排ガス処理システムの設計方法 - Google Patents
脱硝触媒の劣化予測方法、劣化対策方法、劣化対策システム及び排ガス処理システムの設計方法 Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims description 187
- 230000006866 deterioration Effects 0.000 title claims description 101
- 238000000034 method Methods 0.000 title claims description 65
- 238000013461 design Methods 0.000 title claims description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 206
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 188
- 239000007789 gas Substances 0.000 claims description 178
- 229910021529 ammonia Inorganic materials 0.000 claims description 66
- 238000002485 combustion reaction Methods 0.000 claims description 53
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 claims description 36
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 claims description 35
- 230000000694 effects Effects 0.000 claims description 33
- 230000003647 oxidation Effects 0.000 claims description 32
- 238000007254 oxidation reaction Methods 0.000 claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 27
- 230000015556 catabolic process Effects 0.000 claims description 26
- 238000006731 degradation reaction Methods 0.000 claims description 26
- 239000000126 substance Substances 0.000 claims description 18
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 claims description 17
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 15
- 229910052717 sulfur Inorganic materials 0.000 claims description 15
- 239000011593 sulfur Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 238000001556 precipitation Methods 0.000 claims description 14
- 230000007423 decrease Effects 0.000 claims description 13
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 12
- 229910052720 vanadium Inorganic materials 0.000 claims description 11
- 230000001186 cumulative effect Effects 0.000 claims description 7
- 238000000354 decomposition reaction Methods 0.000 claims description 5
- 239000002244 precipitate Substances 0.000 claims description 5
- 229910052815 sulfur oxide Inorganic materials 0.000 claims description 4
- 230000008021 deposition Effects 0.000 claims description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 176
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 74
- 238000006243 chemical reaction Methods 0.000 description 55
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 37
- 230000008569 process Effects 0.000 description 31
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 30
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 30
- 235000011130 ammonium sulphate Nutrition 0.000 description 30
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 29
- 239000004202 carbamide Substances 0.000 description 29
- 238000002347 injection Methods 0.000 description 22
- 239000007924 injection Substances 0.000 description 22
- 239000003638 chemical reducing agent Substances 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 238000003303 reheating Methods 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- 230000006698 induction Effects 0.000 description 4
- NVSDADJBGGUCLP-UHFFFAOYSA-N trisulfur Chemical compound S=S=S NVSDADJBGGUCLP-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 2
- 230000010718 Oxidation Activity Effects 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- NHYGBRXGGQOOBI-UHFFFAOYSA-N [W+4].[V+5] Chemical compound [W+4].[V+5] NHYGBRXGGQOOBI-UHFFFAOYSA-N 0.000 description 2
- 238000012870 ammonium sulfate precipitation Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- -1 SO 2 Chemical class 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000004255 ion exchange chromatography Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000001745 non-dispersive infrared spectroscopy Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
Claims (8)
- 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前記排ガスの温度が400℃を超えない温度範囲で行う排ガス処理において、硫黄酸化物による前記脱硝触媒の劣化を少なくとも前記排ガスの温度と硫黄酸化物の酸化率との関係として、前記脱硝触媒としてバナジウム系脱硝触媒を適用し、前記アンモニア系物質として尿素水を適用して求めた温度が上がるほどSO2酸化率が下がる関係から推定した硫黄析出物の析出累積値に基づいて予測することを特徴とする脱硝触媒の劣化予測方法。
- 前記脱硝触媒の劣化の予測値が予め定められた閾値を超えるときに前記排ガスの温度を上げることを特徴とする請求項1記載の脱硝触媒の劣化予測方法を用いた脱硝触媒の劣化対策方法。
- 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通路と、
前記排ガス通路に設けられた脱硝触媒と、
前記排ガス通路における前記脱硝触媒と前記燃焼機器との間に設けられ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、
前記排ガスの温度が400℃を超えない温度範囲で前記燃焼機器からの前記排ガスに前記アンモニア系物質を添加して前記脱硝触媒で窒素酸化物の分解を行う際に、硫黄酸化物による前記脱硝触媒の劣化を少なくとも前記排ガスの温度と硫黄酸化物の酸化率との関係として、前記脱硝触媒としてバナジウム系脱硝触媒を適用し、前記アンモニア系物質として尿素水を適用して求めた温度が上がるほどSO2酸化率が下がる関係から推定した硫黄析出物の析出累積値に基づいて予測結果を導出する劣化予測手段と、
を備えること特徴とする脱硝触媒の劣化対策システム。 - 前記劣化予測手段は、前記予測結果として前記脱硝触媒の下限活性にまで至る予測時間を導出することを特徴とする請求項3記載の脱硝触媒の劣化対策システム。
- 前記劣化予測手段は、前記予測結果が予め定められた閾値を超えるときに警告を行う警告手段をさらに備えることを特徴とする請求項3又は請求項4記載の脱硝触媒の劣化対策システム。
- 前記排ガスの温度を上昇させる排ガス加熱手段をさらに備え、
前記劣化予測手段による前記予測結果が予め定められた閾値を超えるときに、前記排ガス加熱手段を作動させて前記排ガスの温度を上昇させることを特徴とする請求項3から5のいずれか1項記載の脱硝触媒の劣化対策システム。 - 前記排ガス加熱手段は、前記燃焼機器の負荷を変更する負荷調節手段であることを特徴とする請求項6記載の脱硝触媒の劣化対策システム。
- 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前記排ガスの温度が400℃を超えない温度範囲で行う排ガス処理において、少なくとも前記排ガスの温度と硫黄酸化物の酸化率との関係として、前記脱硝触媒としてバナジウム系脱硝触媒を適用し、前記アンモニア系物質として尿素水を適用して求めた温度が上がるほどSO2酸化率が下がる関係から推定した硫黄析出物の析出累積値に基づいて硫黄酸化物による劣化を予測して、その予測結果に基づいて前記脱硝触媒を含む排ガス処理システムの設計を行う排ガス処理システムの設計方法。
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JP6164718B2 (ja) * | 2011-06-30 | 2017-07-19 | 国立研究開発法人 海上・港湾・航空技術研究所 | 脱硝触媒の劣化関数の算出方法 |
EP2644263A1 (de) | 2012-03-28 | 2013-10-02 | Aurotec GmbH | Druckgeregelter Reaktor |
JP6108847B2 (ja) * | 2013-01-28 | 2017-04-05 | ヤンマー株式会社 | 発電システム |
DE102013017230B4 (de) * | 2013-10-17 | 2021-12-23 | Man Energy Solutions Se | Verfahren zur Desulfatierung eines Abgasnachbehandlungssystem einer Brennkraftmaschine |
WO2017198292A1 (en) * | 2016-05-18 | 2017-11-23 | Volvo Truck Corporation | An exhaust gas treatment system with inductive heating |
CN114460221A (zh) * | 2022-03-17 | 2022-05-10 | 触媒净化技术(南京)有限公司 | 一种脱硝工艺管控方法和系统 |
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JPH08117607A (ja) * | 1994-10-26 | 1996-05-14 | Babcock Hitachi Kk | 排ガス脱硝用板状触媒およびその製造方法 |
JP3376932B2 (ja) * | 1998-12-15 | 2003-02-17 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
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JP3956738B2 (ja) * | 2002-03-27 | 2007-08-08 | 三菱ふそうトラック・バス株式会社 | 内燃機関のNOx浄化装置 |
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