CN110219724A - A kind of purification of ship tail gas and residual neat recovering system and method - Google Patents
A kind of purification of ship tail gas and residual neat recovering system and method Download PDFInfo
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- CN110219724A CN110219724A CN201910495839.XA CN201910495839A CN110219724A CN 110219724 A CN110219724 A CN 110219724A CN 201910495839 A CN201910495839 A CN 201910495839A CN 110219724 A CN110219724 A CN 110219724A
- Authority
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- China
- Prior art keywords
- tail gas
- exhaust
- gas purification
- recovering system
- waste heat
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- 238000000746 purification Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 70
- 239000002918 waste heat Substances 0.000 claims abstract description 35
- 238000010531 catalytic reduction reaction Methods 0.000 claims abstract description 25
- 238000010521 absorption reaction Methods 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 239000000498 cooling water Substances 0.000 claims abstract description 16
- 238000010612 desalination reaction Methods 0.000 claims abstract description 14
- 239000003463 adsorbent Substances 0.000 claims abstract description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 39
- 239000003054 catalyst Substances 0.000 claims description 35
- 239000004202 carbamide Substances 0.000 claims description 32
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 31
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 29
- 239000000919 ceramic Substances 0.000 claims description 29
- 239000003546 flue gas Substances 0.000 claims description 29
- 238000001914 filtration Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 229910021529 ammonia Inorganic materials 0.000 claims description 19
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 16
- 229910001868 water Inorganic materials 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 239000000470 constituent Substances 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 9
- 238000007254 oxidation reaction Methods 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 9
- 239000013535 sea water Substances 0.000 claims description 9
- 229910052878 cordierite Inorganic materials 0.000 claims description 8
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- 238000006722 reduction reaction Methods 0.000 claims description 6
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 5
- CMPGARWFYBADJI-UHFFFAOYSA-L tungstic acid Chemical compound O[W](O)(=O)=O CMPGARWFYBADJI-UHFFFAOYSA-L 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 238000006555 catalytic reaction Methods 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical class [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 3
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 235000010265 sodium sulphite Nutrition 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 235000013495 cobalt Nutrition 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 239000007864 aqueous solution Substances 0.000 description 27
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 description 24
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 16
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 16
- 239000000243 solution Substances 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 238000012545 processing Methods 0.000 description 11
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 238000007598 dipping method Methods 0.000 description 9
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 8
- 239000011609 ammonium molybdate Substances 0.000 description 8
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 8
- 229940010552 ammonium molybdate Drugs 0.000 description 8
- 235000018660 ammonium molybdate Nutrition 0.000 description 8
- 239000008367 deionised water Substances 0.000 description 8
- 229910021641 deionized water Inorganic materials 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- 239000011975 tartaric acid Substances 0.000 description 8
- 235000002906 tartaric acid Nutrition 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 241000196324 Embryophyta Species 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 239000002585 base Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 4
- 239000002156 adsorbate Substances 0.000 description 4
- 230000001413 cellular effect Effects 0.000 description 4
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(2+);cobalt(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 description 4
- 230000002860 competitive effect Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 229910002089 NOx Inorganic materials 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000013505 freshwater Substances 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 210000002700 urine Anatomy 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical group O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- 230000003519 ventilatory effect Effects 0.000 description 2
- PZZOEXPDTYIBPI-UHFFFAOYSA-N 2-[[2-(4-hydroxyphenyl)ethylamino]methyl]-3,4-dihydro-2H-naphthalen-1-one Chemical compound C1=CC(O)=CC=C1CCNCC1C(=O)C2=CC=CC=C2CC1 PZZOEXPDTYIBPI-UHFFFAOYSA-N 0.000 description 1
- 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 1
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical class ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003653 coastal water Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000002525 ultrasonication Methods 0.000 description 1
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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
-
- 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
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a kind of purification of ship tail gas and residual neat recovering system and methods, belong to technical field of energy saving and environmental protection, the ship tail gas purification and residual neat recovering system include exhaust gas purification system, tail gas waste heat recovering system and control system；The exhaust gas purification system includes the filter device group being sequentially communicated with the exhaust pipe of heat exchanger, mixing arrangement, catalytic reduction device and lye spray-absorption device；The tail gas waste heat recovering system includes the desalination plant for being sequentially connected the heat exchanger connect and adsorbent refrigerator with the exhaust main of diesel engine and being connected respectively with the jacket-cooling water pipe of the adsorbent refrigerator and the diesel engine, and the heat exchanger is also connected with the catalytic reduction device；The control system respectively with the exhaust gas purification system and the tail gas waste heat recovering system communication connection.The present invention efficiently uses the waste heat of diesel engine and carries out purified treatment, energy-saving and environmental protection to ship tail gas.
Description
Technical field
The invention belongs to technical field of energy saving and environmental protection, more particularly, to a kind of purification of ship tail gas and residual neat recovering system and
Method.
Background technique
In recent years, the exhaust emissions problem of boat diesel engine is increasingly prominent, its gross contamination emission in 2017 and automobile
Equal roads moving source is suitable, but whole emission level is not higher than state II standard, seriously affects navigation channel and port area air quality.
Currently, the emission reduction of China's prevention and control of air pollution forward direction and quality improve transformation of laying equal stress on, " winning 3 years action plans of blue sky defended war "
" implementing in full engine of boat and ship first stage discharge standard " is explicitly pointed out in file, " is covered in 2019 annual ship emission control areas
Cover rim sea emphasis harbour ", it is desirable that " reinforcing granular material discharged control ", and issue and " accelerate product oil quality upgrading programme of work " rule
Determine coastal waters and inland navigation craft fuel oil sulfur content is gradually down to 0.1% hereinafter, going deep into the emission reduction of the non-rice habitats moving source such as propelling ship.
International Maritime Organization has also issued Tier III stage code requirement, compared with Tier II standard, meets Tier III mark
The nitrogen oxide emission of quasi- engine must reduce nearly 80%, and then propose to the further development of ship tail gas control technology
It requires.
Application No. is the patents of CN2016413055.4 to propose a kind of derv fuel tail for diesel engine vent gas control
Gas processing system, including tail gas treating unit, the temperature for the control tail gas being able to ascend avoid DPF blocking, back pressure from quickly rising
It is high.However ship tail gas pollutant emission characteristic is far beyond diesel engine for automobile complexity: (1) boat diesel engine is mostly middle low speed machine, tail
(150-350 DEG C) of temperature degree is far below diesel engine for automobile exhaust temperature；(2) propellant composition complexity (sulfur content 0.035%-
3.5%), there are a large amount of NO in tail gasx、SOxAnd water vapour；(3) boat diesel engine type general labourer condition is more, contaminant component fluctuation
Greatly.Traditional SCR technology reducing agent urea under the conditions of this temperature can not be completely decomposed into NH3, CO and H2O etc..It does not decompose completely
Urea and the Main By products such as melamine, cyanuric acid be easily deposited in catalyst duct and downstream canal, occluding device
Pipeline influences system normal operation.
Application No. is 2015315791.1,2017551561.4,2017203599.2 and 201811606216.7 patents
Ship tail gas purification heat management system is disclosed, discloses and sprays into fuel oil or high-temperature gas into ship tail gas pipeline, it can be effective
Exhaust temperature is improved, promotes reducing agent urea to decompose and produces ammonia, thus realize the efficient control of pollutant NOx, however system controls
It is relatively complicated, and economy still needs to be promoted.
In general, boat diesel engine can generate a large amount of hot fume at work, and these hot fumes is direct external
Discharge has taken away a large amount of unused thermal energy again, this results in the incomplete utilization of energy when boat diesel engine works normally.This
Outside, it is the safe operation for guaranteeing cylinder of diesel engine, needs to cool down it with cooling water, jacket-cooling water also can be with walking system
Heat.For boat diesel engine, the energy conversion efficiency of fuel oil is very low, and only about 50% is transformed into the machine of diesel engine
Tool function, remaining 50% is waste heat.Wherein about 25% waste heat is taken away by exhaust gas, and about 20% waste heat is by jacket-cooling water
It takes away, the loss of other waste heats accounts for about 5%, therefore the efficiency of energy utilization of system is low.
It can be seen that how to make full use of this partial heat energy, it is ensured that the stable operation of environment friendly system has great importance.
Summary of the invention
To solve above-mentioned technological deficiency, the object of the present invention is to provide a kind of purification of ship tail gas and waste heat recycling
System, including exhaust gas purification system, tail gas waste heat recovering system and control system；
The exhaust gas purification system includes the filter device group being sequentially communicated with the exhaust pipe of the heat exchanger, mixes dress
It sets, catalytic reduction device and lye spray-absorption device；
The tail gas waste heat recovering system includes that the heat exchanger and absorption type connect is sequentially connected with the exhaust main of diesel engine
Refrigeration machine and the desalination plant being connected respectively with the jacket-cooling water pipe of the adsorbent refrigerator and diesel engine, institute
It states heat exchanger to be also connected with the catalytic reduction device, and the outlet pipe of the jacket-cooling water pipe, sea water desalination dress
It sets and forms the first circuit with the water inlet pipe of the jacket-cooling water pipe；The heat exchanger, the adsorbent refrigerator and the sea
Water desalination apparatus forms second servo loop；
The control system is logical with the diesel engine, the exhaust gas purification system and the tail gas waste heat recovering system respectively
News connection is used under conditions of different exhaust emissions amounts, exhaust temperature and component, controlling ozone the amount of injection and urea
Amount.
Heretofore described filter device group includes at least one set DPF ceramic filter body device, and the filter device divides
It is not connected with the exhaust pipe of the heat exchanger and the mixing arrangement.
Heretofore described mixing arrangement includes the mixer of external ozone generator outlet pipeline.
Further, atomizer is placed on the mixer.
Heretofore described catalytic reduction device includes SCR catalyst layer and the urine that is connected with the SCR catalyst layer
Plain decomposer.Wherein, SCR catalyst can be handled the NOx in flue gas, and have certain decompose to aoxidize work in urea
With.
Further, the SCR catalyst layer includes main active constituent, auxiliary active constituent and carrier, the main activity at
Divide includes manganese-base oxide or vanadium base oxide；The auxiliary active constituent includes tungstic acid, molybdenum trioxide, titanium dioxide, oxygen
Change one or more of aluminium, active carbon, ceria or cobaltosic oxide；The carrier is the porous pottery of honeycomb-like cordierite
Porcelain.
Further, urea decomposer includes sequentially connected fluid reservoir, metering pump and spray ammonia equipment, and the spray ammonia
Equipment is placed in the pipeline in catalytic reduction device import upstream and the mixing arrangement downstream.
Condenser, and the catalysis are provided between heretofore described catalytic reduction device and lye spray-absorption device
Reduction apparatus is connected with the bottom of the condenser, the side at the top of the condenser and the lye spray-absorption device
It is connected.
Heretofore described lye spray-absorption device includes spraying layer and spray head, and the spraying layer coverage rate is not less than
300%, the lye of the spray head injection is saturated calcium hydroxide and sodium sulfite complex liquid.
Compared with the prior art, exhaust gas purification system of the present invention will be discharged into atmosphere after the gas cleaning of discharge,
It avoids causing damages to air and environment, environmental protection；The tail gas waste heat recovering system simultaneously, is effectively utilized the remaining of diesel engine
A part of waste heat is used for sea water desalination, crewman and equipment is made to be protected with fresh water amount by heat, and another part waste heat is for improving
Exhaust temperature in catalytic reduction device promotes urea to decompose, and reduces deposit, and energy utilization rate is high, energy conservation, and passes through control system
System adjusts two-part tail gas flux, ozone the amount of injection and amount of urea, with co-ordination load.
Another object of the present invention is to provide a kind of purification of ship tail gas and exhaust heat recovering methods, for above-mentioned ship
Vessel exhaust purification and residual neat recovering system, include the following steps:
Step S1, waste heat recycling: using the jacket-cooling water of diesel engine as low-temperature heat source, the exhaust of the diesel engine is total
For the low-temperature water heating that the high-temperature flue gas of pipe discharge is formed after the recovery waste heat that exchanges heat as high temperature heat source, it is light that a part carries out seawater
Change, another part promotes urea to decompose for improving exhaust temperature in catalytic reduction device；
Waste heat purification: step S2 the high-temperature flue gas that the exhaust main of the diesel engine is discharged is exchanged heat after recovery waste heat
The flue gas of discharge is discharged into atmosphere after being purified, the process of the purification successively include filtering, ozone oxidation, catalyst also
Former and lye absorbs.
Heretofore described ship tail gas purification and exhaust heat recovering method and the ship tail gas purify and waste heat recycling is
The beneficial effect of system is identical, and details are not described herein.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of a kind of purification of ship tail gas and residual neat recovering system in the present invention；
Fig. 2 is the flow chart of a kind of purification of ship tail gas and exhaust heat recovering method in the present invention.
Description of symbols:
1- diesel engine；2- heat exchanger；3- mixing arrangement, 31- ozone generator；4- filter device group, 41- opening and closing valve,
42-DPF ceramic filtering body；5- catalytic reduction device, 51- urea decomposer, 52-SCR catalyst layer；6- lye spray-absorption
Device, 61- excretory duct, 62- air blower；7- adsorbent refrigerator；8- desalination plant；9- condenser.
Specific embodiment
Below in conjunction with attached drawing, detailed description of embodiments of the present invention, but the present invention can have the right to require limit
Fixed and covering multitude of different ways is implemented.
Such as attached drawing 1, the present invention provides a kind of purification of ship tail gas and residual neat recovering systems, including recovery system and purification
System, the purification system include the filter device group 4 being sequentially communicated with the exhaust pipe of the heat exchanger 2, mixing arrangement 3, urge
Change reduction apparatus 5 and lye spray-absorption device 6；Specially exhaust pipe is connected with filter device group 4, and filter device group 4 is again
With being connected for mixing arrangement 3, mixing arrangement 3 is connected with the top of catalytic reduction device 5, and the bottom of catalytic reduction device 5
Portion is connected with the side of lye spray-absorption device 6, finally, the top of lye spray-absorption device 6 with air blower 62 with
Atmosphere is connected.
The recovery system includes that the heat exchanger 2 and adsorbent refrigerator 7 connect is sequentially connected with the exhaust main of diesel engine 1
And the desalination plant 8 being connected respectively with the jacket-cooling water pipe of the adsorbent refrigerator 7 and diesel engine 1, it is described
Heat exchanger is also connected with the catalytic reduction device 5, and the outlet pipe of the jacket-cooling water pipe, the desalination plant
8 and the jacket-cooling water pipe water inlet pipe formed the first circuit；The heat exchanger 2, the adsorbent refrigerator 7 and the sea
Water desalination apparatus 8 forms second servo loop.Wherein jacket-cooling water is as low-temperature heat source, the high temperature of 1 discharge header of diesel engine discharge
Low-temperature water heating a part that flue gas is successively formed after heat exchanger 2 and adsorbent refrigerator 7 is as high temperature heat source, heating seawater
Desalting plant 8, preparing fresh, another part improve in catalytic reduction device 5 for the tail gas in heatable catalytic reduction apparatus 5
Exhaust temperature promotes urea to decompose, and reduces deposit, and adjust two-part tail gas flux, ozone injection by control system
Amount and amount of urea with co-ordination load in some embodiments, when needing to produce more fresh water, can pass through control
System increases exhaust main and is passed through the ventilatory capacity in desalination plant 8, while reducing exhaust main and being passed through the catalysis reduction
Ventilatory capacity in device 5, to guarantee the normal workload of system.
In the present invention filter device group 4 include an at least DPF ceramic filtering body 42, and the DPF ceramic filtering body 42 with
The mixing arrangement 3 is connected.And preferred DPF ceramic filtering body 42 is honeycomb-like cordierite porous ceramics, and DPF in the present invention
The quantity of ceramic filtering body 42 is two, and particular number can also have more actual conditions selection, every DPF ceramic filtering body 42
With opening and closing valve 41 on two lateral lines, this makes it possible to the switchings realized between two DPF ceramic filtering bodies 42, facilitate DPF
The maintenance of ceramic filtering body 42 and to activated carbon carry out desorption operations, facilitate total system and continuously operated.Meanwhile
The flue gas come out from mixing arrangement 3, by after DPF ceramic filtering body 42, solid particle in flue gas and most
Sulfur dioxide can be adsorbed substantially by activated carbon.
In order to guarantee that DPF ceramic filtering body 42 can be switched over successfully, avoid being adsorbed by DPF ceramic filtering body full
With the influence of problem.Vapor pipe, vapor pipe and heat exchanger is arranged in the top of each DPF ceramic filtering body 42 in the present invention
Cold fluid hose in 2 is connected, and vapor obtains after being directly heated by heat exchanger 2 at this time, to be conducive to improve heat
Utilization rate reduces energy loss；Waste collection pipe is arranged in the bottom of DPF ceramic filtering body 42, when a DPF ceramic filtering body
When active carbon adsorption in 42 is saturated, flue gas need to be only switched on another DPF ceramic filtering body 42 by staff.This
When, when the vapor being passed through flows through activated carbon from top to bottom, since vapor and flue gas before are reverse flows, it is easy
Desorb solid particle and sulfur trioxide and sulfur dioxide from activated carbon, and vapor is easy and two during this
Sulfur oxide and sulfur trioxide produce sulfurous acid, further increase the effect that sulfur dioxide and sulfur trioxide are desorbed from activated carbon
Rate.Waste collection pipe can collect solid particle, vapor and sulfurous acid, and be delivered to designated position and carry out centralization
Processing.
The two sides of DPF ceramic filtering body 42 also have dry gas inlet pipe and dry gas outlet pipe, when vapor is completed to DPF
After the desorption operations of ceramic filtering body 42, DPF ceramic filtering body 42 can be then dried by dry gas, to guarantee
DPF ceramic filtering body is subsequent still to have efficient adsorption efficiency.
Heretofore described mixing arrangement 3 includes the mixer of external 31 export pipeline of ozone generator, the mixer
On be placed with atomizer, the major function of ozone generator 31 is that sufficient ozone is provided for mixer, when flue gas enters
When in mixer, ozone is mixed with flue gas in a mixer by atomizer injection.And due to flue gas inherently band
There is certain heat, thus nitrogen oxides, sulfur dioxide can quickly be oxidized to nitrogen dioxide and sulfur trioxide.Meanwhile it is smelly
Oxygen is during antioxidant nitroxide and sulfur dioxide, as long as temperature control is at 20~60 DEG C, it will be able to realize 95% or more
Oxidation.But when the temperature of environment is more than 50 DEG C, the efficiency of ozone itself decomposed will be accelerated.Therefore it is being vented
Heat exchanger 2 is set on pipe, and the temperature that flue gas leaves heat exchanger 2 at this time is controlled at 40~80 DEG C.And the nitrogen oxidation in oxygen and flue gas
The ratio between mole of object and sulfur dioxide is 0.6, in this way when flue gas and ozone mix, enables to the temperature of mixed gas
Degree is maintained to 20~60 DEG C of ranges, advantageously ensures that the oxidation efficiency of ozone.
The catalytic reduction device 5 includes that SCR catalyst layer 52 and the urea being connected with SCR catalyst layer 52 decompose dress
Set 51.The SCR catalyst layer 52 includes main active constituent, auxiliary active constituent and carrier, and the main active constituent includes manganese base
Oxide or vanadium base oxide, the auxiliary active constituent include tungstic acid, molybdenum trioxide, titanium dioxide, aluminium oxide, activity
One or more of charcoal, ceria or cobaltosic oxide；The carrier is honeycomb-like cordierite porous ceramics.Wherein preferably
Main active constituent vanadium base oxide is vanadic anhydride, on the one hand can be catalyzed NO, NO2React with ammonia generate nitrogen and
Vapor, and NO, NO during this2Fast SCR system can be constituted with ammonia.And under this system status, NO and
NO2The rate for being converted to nitrogen and vapor than directly from conversion of nitrogen oxides at the rate of nitrogen and vapor faster,
Reaction rate can be improved 3 to 5 times.Wherein preferably auxiliary active constituent includes tungstic acid, molybdenum trioxide, and tungstic acid and three
The thermal stability of catalyst can be improved in molybdenum oxide, and can improve the activity, selectivity and mechanical strength of catalyst, and MoO3Also
The anti-As of catalyst can be enhanced2O3Poisoning capability.
The urea decomposer 51 includes sequentially connected fluid reservoir, metering pump and spray ammonia equipment, and the spray ammonia is set
Standby, the described metering pump and the fluid reservoir are sequentially connected with, and the spray ammonia equipment is placed in the mixing arrangement downstream line, and is set
Before 52 import of SCR catalyst layer, the form for aqueous solution of urea to be atomized, which is matched, to be mapped in exhaust pipe, the storage
Flow container is used for stored urea, and liquid level sensor is arranged in fluid reservoir, for monitoring the storage capacity of urine；The metering pump is being controlled
Under the control of device processed, for extracting urea out from fluid reservoir, and take urea to the spray ammonia equipment, control system is for acquiring
And the data in exhaust pipe are analyzed, Xiang Suoshu metering pump issues the control instruction of aqueous solution of urea flow.It is filled when urea decomposes
When setting 51 start-up operation, the control system issues urine for acquiring and analyzing the data in exhaust pipe, Xiang Suoshu metering pump
Urea is extracted out from fluid reservoir, and enters exhaust pipe through spraying ammonia equipment by the control instruction of the water-soluble flow quantity of element, the metering pump
In road, the aqueous solution of urea in exhaust pipe is mixed through pyrolysis decomposition at ammonia and water, and with exhaust, enters catalyst layer,
Under the effect of the catalyst, NO, NO2It reacts with ammonia and generates nitrogen and vapor, ammonia is participating in the same of denitration reaction
When, the decomposition of urea is accelerated, avoids the problem that excessively blocking pipeline due to urea.
The lye spray-absorption device 6 includes spraying layer and spray head, and the spraying layer coverage rate is not less than 300%,
The lye of the spray head injection is saturated calcium hydroxide and sodium sulfite complex liquid.In order to which the alkali of absorption is discharged in time
Liquid, the bottom of lye spray-absorption device 6 also has excretory duct 61 herein, which can carry out at specified collection waste material
Connection, so as to centralized processing.
Condenser 9, and the catalytic unit 5 are provided between the catalytic reduction device 5 and lye spray-absorption device 6
It is connected with the bottom of the condenser 9, the top of the condenser 9 is connected with the side of the lye spray-absorption device 6
It is logical.Since the main ingredient of the gas after catalytic reduction device 5 is nitrogen, water vapour, extra ammonia and a small amount of two
Sulfur oxide and sulfur trioxide gas.Herein, condenser can cool down to flue gas, so that water vapour is condensed into water, it is cold at this time
Condensate can absorb the ammonia in flue gas, to avoid leaking for ammonia.Meanwhile after cooling, sulfur dioxide and sulfur trioxide
It is more readily dissolved in lye, is absorbed to further realize Alkali absorption device to a small amount of sulfur dioxide and sulfur trioxide.
Therefore, exhaust gas purification system of the present invention will be discharged into atmosphere after the gas cleaning of discharge, avoid to air
And environment causes damages, environmental protection；The tail gas waste heat recovering system simultaneously, is effectively utilized the waste heat of diesel engine, will be a part of
Waste heat is used for sea water desalination, and crewman and equipment is made to be protected with fresh water amount, and another part waste heat is for mentioning high catalytic reduction dress
Exhaust temperature in 5 is set, urea is promoted to decompose, reduces deposit, energy utilization rate is high, energy conservation, and adjusts two by control system
Partial tail gas flux, ozone the amount of injection and amount of urea, with co-ordination load.
Such as attached drawing 2, the present invention also provides a kind of purification of ship tail gas and exhaust heat recovering methods, for above-mentioned ship tail
Gas purification and residual neat recovering system, include the following steps:
Step S1, waste heat recycling: using the jacket-cooling water of diesel engine 1 as low-temperature heat source, by the exhaust of the diesel engine
For the low-temperature water heating that the high-temperature flue gas of general pipeline discharge is formed after the recovery waste heat that exchanges heat as high temperature heat source, it is light that a part carries out seawater
Change, another part promotes urea to decompose for improving exhaust temperature in catalytic reduction device；
Waste heat purification: step S2 the high-temperature flue gas that the exhaust main of the diesel engine 1 is discharged is exchanged heat after recovery waste heat
The flue gas of discharge is discharged into atmosphere after being purified, the process of the purification successively include filtering, ozone oxidation, catalyst also
Former and lye absorbs.
Wherein step S2 is specifically included, and the high-temperature flue gas of the exhaust main discharge of diesel engine 1 is through the recovery waste heat heel row that exchanges heat
Flue gas out enters filter device group 4, by 42 suction-operated of DPF ceramic filtering body, can by flue gas solid particle and
The sulfur trioxide absorption that oxidation generates enters in catalytic reduction device 5 after entering back into mixer and ozone generation oxidation reaction,
NOXThe ammonia generated, which is decomposed, with urea generates N under the catalytic action of SCR catalyst2And H2O.And then flue gas can flow through condensation
Device 9, into lye spray-absorption device 6, improves solubility of the flue gas in lye, obtains flue gas after the cooling of condenser 9
It is discharged into atmosphere after sufficiently cleaned up by air blower 62, energy conservation and environmental protection.
In present embodiment SCR catalyst the preparation method is as follows:
Step 1: the preparation of ammonium metavanadate aqueous solution: ammonium metavanadate being dissolved in deionized water, tartaric acid is then added and makees
For competitive adsorbate, it is stirred continuously to being uniformly mixed, obtains ammonium metavanadate aqueous solution, the quality hundred of the ammonium metavanadate aqueous solution
Dividing specific concentration is 0.1~0.3%；The additional amount of tartaric acid is the 0.3~0.5% of ammonium metavanadate aqueous solution quality, and stirring continues
Time is 40~60min.
Step 2: honeycomb-like cordierite cellular ceramic substrate is dipped in ammonium metavanadate aqueous solution obtained in step 1,
And the solution is placed in supersonic generator and carries out ultrasonic wave dipping modification, ultrasonic frequency is set as 25~30kHz, and power is set
For 350~450W, the processing time is 1.5~2h, obtains catalyst A.Activity is increased using ultrasonic wave dipping active component solution
The dispersion degree of content, raising active component in the load capacity of component and hole, compared with conventional impregnation, activity component load quantity can be mentioned
Rise 1.25 times.Preferred ultrasonication parameter can be last conversion rate of NOx compared with other values and improve 5% or so.
Step 3: ammonium molybdate is dissolved in deionized water, is stirred continuously to being uniformly mixed, is obtained solution A；The mixing is molten
In liquid, the mass percent concentration of ammonium molybdate aqueous solution is 3~8%, and the stirring duration is 40~60min.
Step 4: the catalyst A that step 2 obtains is dipped in solution A, and the system is placed in supersonic generator
It carries out ultrasonic wave dipping to be modified, ultrasonic frequency is set as 25~30kHz, and power is set as 350~450W, and the processing time chooses 1.5
~2h obtains SCR catalyst.
Embodiment 1
In the present embodiment SCR catalyst the preparation method is as follows:
Step 1: the preparation of ammonium metavanadate aqueous solution: ammonium metavanadate being dissolved in deionized water, tartaric acid is then added and makees
For competitive adsorbate, it is stirred continuously to being uniformly mixed, obtains ammonium metavanadate aqueous solution, the quality hundred of the ammonium metavanadate aqueous solution
Dividing specific concentration is 0.1；The additional amount of tartaric acid is the 0.3 of ammonium metavanadate aqueous solution quality, and the stirring duration is 40min.
Step 2: honeycomb-like cordierite cellular ceramic substrate is dipped in ammonium metavanadate aqueous solution obtained in step 1,
And the solution is placed in supersonic generator and carries out ultrasonic wave dipping modification, ultrasonic frequency is set as 25, and power is set as 350,
The processing time is 1.5h, obtains catalyst A.
Step 3: ammonium molybdate is dissolved in deionized water, is stirred continuously to being uniformly mixed, is obtained solution A；The mixing is molten
In liquid, the mass percent concentration of ammonium molybdate aqueous solution is 3%, and the stirring duration is 40min.
Step 4: the catalyst A that step 2 obtains is dipped in solution A, and the system is placed in supersonic generator
It carries out ultrasonic wave dipping to be modified, ultrasonic frequency is set as 25kHz, and power is set as 35W, and the processing time chooses 1.5h, obtains SCR and urges
Agent.
Embodiment 2
In the present embodiment SCR catalyst the preparation method is as follows:
Step 1: the preparation of ammonium metavanadate aqueous solution: ammonium metavanadate being dissolved in deionized water, tartaric acid is then added and makees
For competitive adsorbate, it is stirred continuously to being uniformly mixed, obtains ammonium metavanadate aqueous solution, the quality hundred of the ammonium metavanadate aqueous solution
Dividing specific concentration is 0.3%；The additional amount of tartaric acid be ammonium metavanadate aqueous solution quality 0.5%, stirring the duration be
60min。
Step 2: honeycomb-like cordierite cellular ceramic substrate is dipped in ammonium metavanadate aqueous solution obtained in step 1,
And the solution is placed in supersonic generator and carries out ultrasonic wave dipping modification, ultrasonic frequency is set as 30kHz, and power is set as
450W, processing time are 2h, obtain catalyst A.
Step 3: ammonium molybdate is dissolved in deionized water, is stirred continuously to being uniformly mixed, is obtained solution A；The mixing is molten
In liquid, the mass percent concentration of ammonium molybdate aqueous solution is 3~8%, and the stirring duration is 40~60min.
Step 4: the catalyst A that step 2 obtains is dipped in solution A, and the system is placed in supersonic generator
It carries out ultrasonic wave dipping to be modified, ultrasonic frequency is set as 30kHz, and power is set as 450W, and the processing time chooses 2h, obtains SCR and urges
Agent.
Embodiment 3
Step 1: the preparation of ammonium metavanadate aqueous solution: ammonium metavanadate being dissolved in deionized water, tartaric acid is then added and makees
For competitive adsorbate, it is stirred continuously to being uniformly mixed, obtains ammonium metavanadate aqueous solution, the quality hundred of the ammonium metavanadate aqueous solution
Dividing specific concentration is 0.25%；The additional amount of tartaric acid be ammonium metavanadate aqueous solution quality 0.4%, stirring the duration be
45min。
Step 2: honeycomb-like cordierite cellular ceramic substrate is dipped in ammonium metavanadate aqueous solution obtained in step 1,
And the solution is placed in supersonic generator and carries out ultrasonic wave dipping modification, ultrasonic frequency is set as 25kHz, and power is set as
385W, processing time are 1.8h, obtain catalyst A.
Step 3: ammonium molybdate is dissolved in deionized water, is stirred continuously to being uniformly mixed, is obtained solution A；The mixing is molten
In liquid, the mass percent concentration of ammonium molybdate aqueous solution is 6%, and the stirring duration is 50min.
Step 4: the catalyst A that step 2 obtains is dipped in solution A, and the system is placed in supersonic generator
It carries out ultrasonic wave dipping to be modified, ultrasonic frequency is set as 28kHz, and power is set as 400W, and the processing time chooses 1.7h, obtains SCR
Catalyst.
The foregoing is merely presently preferred embodiments of the present invention, is merely illustrative for the purpose of the present invention, and not restrictive
's.Those skilled in the art understand that in the spirit and scope defined by the claims in the present invention many changes can be carried out to it,
It modifies or even equivalent, but falls in protection scope of the present invention.
Claims (10)
1. a kind of ship tail gas purification and residual neat recovering system, which is characterized in that recycled including exhaust gas purification system, waste heat from tail gas
System and control system；
The exhaust gas purification system includes the filter device group (4) being sequentially communicated with the exhaust pipe of heat exchanger (2), mixing arrangement
(3), catalytic reduction device (5) and lye spray-absorption device (6)；
The tail gas waste heat recovering system include be sequentially connected with the exhaust main of diesel engine (1) heat exchanger (2) connect and
Adsorbent refrigerator (7) and it is connected respectively with the jacket-cooling water pipe of the adsorbent refrigerator (7) and the diesel engine (1)
The desalination plant (8) connect, the heat exchanger (2) are also connected with the catalytic reduction device (5), and the cylinder sleeve is cooling
The water inlet pipe of the outlet pipe of water pipe, the desalination plant (8) and the jacket-cooling water pipe forms the first circuit；It is described to change
Hot device (2), the adsorbent refrigerator (7) and the desalination plant (8) form second servo loop；
The control system is logical with the diesel engine (1), the exhaust gas purification system and the tail gas waste heat recovering system respectively
News connection is used under conditions of different exhaust emissions amounts, exhaust temperature and component, controlling ozone the amount of injection and urea
Amount.
2. ship tail gas purification according to claim 1 and residual neat recovering system, which is characterized in that the filter device group
It (4) include at least one set DPF ceramic filter body device (42), and the filter device exhaust with the heat exchanger (2) respectively
Pipe is connected with the mixing arrangement (3).
3. ship tail gas purification according to claim 2 and residual neat recovering system, which is characterized in that the mixing arrangement
(3) include external ozone generator (31) export pipeline mixer.
4. ship tail gas purification according to claim 3 and residual neat recovering system, which is characterized in that arranged on the mixer
It is furnished with atomizer.
5. ship tail gas purification according to claim 1 and residual neat recovering system, which is characterized in that the catalysis is also original-pack
Setting (5) includes SCR catalyst layer (52) and the urea decomposer (51) being connected with the SCR catalyst layer (52).
6. ship tail gas purification according to claim 5 and residual neat recovering system, which is characterized in that the SCR catalyst
Layer (52) includes main active constituent, auxiliary active constituent and carrier, and the main active constituent includes manganese-base oxide or the oxidation of vanadium base
Object；The auxiliary active constituent includes tungstic acid, molybdenum trioxide, titanium dioxide, aluminium oxide, active carbon, ceria or four oxygen
Change one or more of three cobalts；The carrier is honeycomb-like cordierite porous ceramics.
7. ship tail gas purification according to claim 5 and residual neat recovering system, which is characterized in that the urea decomposes dress
Set (51) include sequentially connected fluid reservoir, metering pump and spray ammonia equipment, and the spray ammonia equipment be placed in it is described be catalyzed it is also original-pack
In the pipeline for setting import upstream and the mixing arrangement (3) downstream.
8. ship tail gas purification according to claim 1 and residual neat recovering system, which is characterized in that the catalysis is also original-pack
Set and be provided with condenser (9) between (5) and the lye spray-absorption device (6), and the catalytic reduction device (5) with it is described
The bottom of condenser (9) is connected, and the top of the condenser (9) is connected with the side of the lye spray-absorption device (6)
It is logical.
9. ship tail gas purification according to claim 8 and residual neat recovering system, which is characterized in that the lye spray is inhaled
Receiving apparatus (6) includes spraying layer and spray head, and the spraying layer coverage rate is not less than 300%, the lye of the spray head injection
For saturated calcium hydroxide and sodium sulfite complex liquid.
10. a kind of ship tail gas purification and exhaust heat recovering method, for the described in any item ship tail gas purifications of claim 1-9
And residual neat recovering system, which comprises the steps of:
Step S1, waste heat recycling: using the jacket-cooling water of diesel engine (1) as low-temperature heat source, by the exhaust of the diesel engine (1)
For the low-temperature water heating that the high-temperature flue gas of general pipeline discharge is formed after the recovery waste heat that exchanges heat as high temperature heat source, it is light that a part carries out seawater
Change, another part promotes urea to decompose for improving exhaust temperature in catalytic reduction device (5)；
Step S2, waste heat purification: the high-temperature flue gas that the exhaust main of the diesel engine (1) is discharged is through the recovery waste heat heel row that exchanges heat
Flue gas out is discharged into atmosphere after being purified, and the process of the purification successively includes filtering, ozone oxidation, catalyst reduction
It is absorbed with lye.
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| CN113958392A (en) * | 2021-11-02 | 2022-01-21 | 浙江海洋大学 | Exhaust purification integrated device for boats and ships |
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| CN110541747B (en) * | 2019-09-26 | 2024-06-04 | 浙江海洋大学 | Ship tail gas treatment system |
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| CN114849447A (en) * | 2022-04-25 | 2022-08-05 | 镇江海纳川生态环境科技有限公司 | Ship auxiliary engine fuel waste gas treatment device for ship shore power and treatment method thereof |
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Application publication date: 20190910 |