JP6140470B2 - 排ガス浄化システム - Google Patents
排ガス浄化システム Download PDFInfo
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- JP6140470B2 JP6140470B2 JP2013028082A JP2013028082A JP6140470B2 JP 6140470 B2 JP6140470 B2 JP 6140470B2 JP 2013028082 A JP2013028082 A JP 2013028082A JP 2013028082 A JP2013028082 A JP 2013028082A JP 6140470 B2 JP6140470 B2 JP 6140470B2
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- reducing agent
- exhaust gas
- storage tank
- liquid
- purification system
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- 238000000746 purification Methods 0.000 title claims description 54
- 239000003638 chemical reducing agent Substances 0.000 claims description 241
- 239000007789 gas Substances 0.000 claims description 165
- 239000007788 liquid Substances 0.000 claims description 160
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 101
- 239000003054 catalyst Substances 0.000 claims description 78
- 230000008016 vaporization Effects 0.000 claims description 40
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000009834 vaporization Methods 0.000 claims description 24
- 238000002485 combustion reaction Methods 0.000 claims description 19
- 238000011144 upstream manufacturing Methods 0.000 claims description 16
- 229930195733 hydrocarbon Natural products 0.000 claims description 11
- 150000002430 hydrocarbons Chemical class 0.000 claims description 11
- 238000009835 boiling Methods 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 150000002576 ketones Chemical class 0.000 claims description 4
- 150000002894 organic compounds Chemical class 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 150000001298 alcohols Chemical class 0.000 description 5
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 150000002170 ethers Chemical class 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical group O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 2
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 2
- -1 methyl ethyl ketone Chemical compound 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- MSSNHSVIGIHOJA-UHFFFAOYSA-N pentafluoropropane Chemical compound FC(F)CC(F)(F)F MSSNHSVIGIHOJA-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1808—Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1811—Temperature
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
液体還元剤貯留槽と、圧縮空気供給手段とを備えており、前記液体還元剤貯留槽内で気化した還元剤に対して前記圧縮空気供給手段から圧縮空気が供給されて、気化還元剤同伴空気が形成され、この気化還元剤同伴空気が前記還元剤供給手段に供給されることを特徴としている。
液体還元剤貯留槽と、還元剤気化用熱交換器とを備えており、液体還元剤貯留槽から導出された還元剤が熱交換器において加熱されて気化せしめられ、この気化還元剤が、前記還元剤供給手段に供給されることを特徴としている。
本発明の第1発明の第1実施形態のフローシートを示す図1に基づいて本発明の排ガス浄化システムを実施した。
なお、貯留槽5内の液体エタノールの温度を50℃に保持することにより、貯留槽5の上部空間内の気化還元剤の蒸気圧は一定に保持され、貯留槽5の上部空間内の気化還元剤の濃度が一定となった。このため、貯留槽5の上部空間内に供給する圧縮空気の流量および貯留槽内液体還元剤温度を制御することにより、圧縮空気に同伴される気化還元剤の量も制御され、この気化還元剤同伴空気を還元剤供給管3から排気通路2内の排ガスに添加することにより、排ガスへの気化還元剤の添加量を制御することができた。
上記第1実施例の場合と同様にして、本発明の排ガス浄化システムを実施するが、第1実施例の場合と異なる点は、本発明の第1発明の第2実施形態のフローシートを示す図2に基づいて排ガス浄化システムを実施した点にある。すなわち、液体還元剤貯留槽5の内部に加熱器(加熱手段)15が設けられ、この内部加熱器15によって貯留槽5内の液体還元剤の温度を調整した。具体的には、液体還元剤としてエタノールを使用し、脱硝触媒層4の下流側の排気通路2に設置された熱交換器9において、触媒層4から排出された浄化排ガスの排熱で循環水を、50℃に加温した後、温水循環管10によって貯留槽5の内部加熱器15に返送し、貯留槽5の温度を50℃に保持した。
上記第1実施例の場合と同様にして、本発明の排ガス浄化システムを実施するが、第1実施例の場合と異なる点は、本発明の第2発明の第1実施形態のフローシートを示す図3に基づいて排ガス浄化システムを実施した点にある。
比較のために、従来の排ガス浄化システムのフローシートを示す図4に基づいて排ガス浄化システムを実施した。
2:排気通路
3:還元剤供給用管(還元剤供給手段)
4:脱硝触媒層
5:液体還元剤貯留槽
6:コンプレッサー(圧縮空気供給手段)
7:導管
8:ジャケット式加熱器(加熱手段)
9:循環水加熱用熱交換器(循環熱媒体加熱用熱交換器)
10:温水循環管(熱媒体循環管)
11:ポンプ
12:液体還元剤保管槽
13:導管
14:ポンプ
15:内部加熱器(加熱手段)
16:還元剤気化用熱交換器
17:導管
18:ポンプ
Claims (6)
- 内燃機関の排気通路に、上流側から順に還元剤供給手段と脱硝触媒層が配置され、前記還元剤供給手段よりアルコール、エーテル、ケトン類、および炭化水素よりなる群の中から選ばれた少なくとも1つの有機化合物である還元剤が前記触媒層上流側の排ガスに添加され、排ガス中の窒素酸化物が還元されて、排ガスが浄化される排ガス浄化システムにおいて、
液体還元剤貯留槽と、圧縮空気供給手段とを備えており、前記液体還元剤貯留槽の液体還元剤の温度は沸点以下に保持され、前記液体還元剤貯留槽内で前記圧縮空気供給手段から圧縮空気が供給されて気化した還元剤に対して気化還元剤同伴空気が形成され、この気化還元剤同伴空気が前記還元剤供給手段に供給されることを特徴とする、排ガス浄化システム。 - 前記圧縮空気供給手段から液体還元剤貯留槽内に供給する圧縮空気の流量および貯留槽内液体還元剤温度を制御することにより、排ガスに添加する気化還元剤量を制御することを特徴とする、請求項1に記載の排ガス浄化システム。
- さらに液体還元剤保管槽を備えており、前記液体還元剤貯留槽には液面計が設置され、この液面計からの貯留槽内還元剤液上面のレベル検知信号に基づいて、前記液体還元剤保管槽から液体還元剤貯留槽に供給される還元剤の供給量が制御されることを特徴とする、請求項1または2に記載の排ガス浄化システム。
- 前記液体還元剤貯留槽に加熱手段が備えられ、この加熱手段によって貯留槽内の液体還元剤の温度が調整されることを特徴とする、請求項1〜3のうちのいずれか一項に記載の排ガス浄化システム。
- 脱硝触媒層の下流側の排気通路に循環熱媒体加熱用熱交換器が設置され、該熱交換器と前記加熱手段とは熱媒体循環管によって接続されており、該熱交換器において触媒層から排出された浄化排ガスの排熱で、液体還元剤貯留槽の加熱手段からの循環熱媒体が加温されることを特徴とする、請求項4に記載の排ガス浄化システム。
- 液体還元剤貯留槽の温度を一定に保つことを特徴とする、請求項1〜5のうちのいずれか一項に記載の排ガス浄化システム。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2013028082A JP6140470B2 (ja) | 2013-02-15 | 2013-02-15 | 排ガス浄化システム |
PCT/JP2014/053160 WO2014126090A1 (ja) | 2013-02-15 | 2014-02-12 | 排ガス浄化システム |
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JP2013028082A JP6140470B2 (ja) | 2013-02-15 | 2013-02-15 | 排ガス浄化システム |
Publications (3)
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JP2014156821A JP2014156821A (ja) | 2014-08-28 |
JP2014156821A5 JP2014156821A5 (ja) | 2016-03-03 |
JP6140470B2 true JP6140470B2 (ja) | 2017-05-31 |
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WO (1) | WO2014126090A1 (ja) |
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GB201421869D0 (en) * | 2014-12-09 | 2015-01-21 | Delphi International Operations Luxembourg S.�.R.L. | SCR dosing system |
CN112879126B (zh) * | 2021-01-21 | 2022-05-13 | 天津大学 | 一种无催化的双还原剂NOx脱除方法及其装置 |
US11649761B1 (en) | 2021-12-22 | 2023-05-16 | Caterpillar Inc. | Systems for methanol vaporization |
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JPH05272331A (ja) * | 1992-03-25 | 1993-10-19 | Hino Motors Ltd | 排ガス浄化装置およびその排ガス浄化装置に使用される還元剤供給方法および装置 |
JPH09267025A (ja) * | 1996-03-29 | 1997-10-14 | Kawasaki Heavy Ind Ltd | 排ガス脱硝用還元剤の供給方法 |
JP4917208B2 (ja) * | 2001-01-22 | 2012-04-18 | 川崎重工業株式会社 | 脱硝装置用液体還元剤の供給方法及び装置 |
JP4888480B2 (ja) * | 2008-12-15 | 2012-02-29 | 株式会社デンソー | 排気浄化システムの制御装置 |
WO2013114614A1 (ja) * | 2012-02-03 | 2013-08-08 | 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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WO2014126090A1 (ja) | 2014-08-21 |
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