CN106731831A - A kind of low temperature plasma pre-oxidizes joint SCR desulphurization denitration noise reduction dedusting set composites - Google Patents
A kind of low temperature plasma pre-oxidizes joint SCR desulphurization denitration noise reduction dedusting set composites Download PDFInfo
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- 230000009467 reduction Effects 0.000 title claims abstract description 23
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 42
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000004202 carbamide Substances 0.000 claims abstract description 35
- 230000003647 oxidation Effects 0.000 claims abstract description 32
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 32
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 239000007921 spray Substances 0.000 claims abstract description 7
- 239000000428 dust Substances 0.000 claims description 15
- 239000011358 absorbing material Substances 0.000 claims description 3
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000004071 soot Substances 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 46
- 210000002381 plasma Anatomy 0.000 description 45
- 238000006243 chemical reaction Methods 0.000 description 24
- 238000006722 reduction reaction Methods 0.000 description 15
- 150000003863 ammonium salts Chemical class 0.000 description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 10
- 239000000443 aerosol Substances 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 8
- 238000006477 desulfuration reaction Methods 0.000 description 7
- 230000023556 desulfurization Effects 0.000 description 7
- 230000005684 electric field Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 6
- 229910017604 nitric acid Inorganic materials 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 239000008187 granular material Substances 0.000 description 5
- RJIWZDNTCBHXAL-UHFFFAOYSA-N nitroxoline Chemical compound C1=CN=C2C(O)=CC=C([N+]([O-])=O)C2=C1 RJIWZDNTCBHXAL-UHFFFAOYSA-N 0.000 description 5
- 150000003254 radicals Chemical class 0.000 description 5
- 238000005201 scrubbing Methods 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 231100000572 poisoning Toxicity 0.000 description 3
- 230000000607 poisoning effect Effects 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000006213 oxygenation reaction Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009466 transformation Effects 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
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9431—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/02—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
- B01D53/323—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00 by electrostatic effects or by high-voltage electric fields
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Combustion & Propulsion (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
A kind of low temperature plasma pre-oxidizes joint SCR desulphurization denitration noise reduction dedusting set composites, including：Low temperature plasma pre-oxidation device, urea supply vaporising device and SCR device；Urea supply vaporising device includes urea flow container, urea pump, evaporator and spray ammonia nozzle, urea liquid flows through described urea pump and evaporator successively through pipeline from described urea flow container, after urea liquid decomposes generation ammonia in evaporator, unit feeding ammonia is pre-oxidized to low temperature plasma by the spray ammonia nozzle being arranged in expansion chambers.It is multi-functional that the present invention integrates desulphurization and denitration, noise reduction, dedusting, saves floor space and the investment of equipment, can not only be to NOxAnd SOxEffectively processed, and the soot in diesel engine vent gas, and the technical work moderate temperature (100~200 DEG C) can be removed, far below the exhaust temperature of diesel engine, diesel engine running parameter need not be adjusted, it is smaller to diesel engine work performance impact.
Description
Technical field
The present invention relates to a kind of diesel engine exhaust gas treatment device, and in particular to pre-oxidize joint using low temperature plasma
SCR carries out the set composite of desulphurization denitration noise reduction dedusting, belongs to ship tail gas emission control technique field.
Background technology
NOxAnd SOxIt is two big major pollutants of boat diesel engine exhaust emissions, its discharge is caused sternly to global environment
The influence of weight.Increasingly strict with Abgasgesetz, reducing boat diesel engine tail gas discharging pollutant simultaneously makes it meet exhaust method
The demand of rule becomes more and more important.At present to NOxAnd SOx(selective catalysis are also for SCR to carry out the maximally efficient method for the treatment of
It is former) and SOxScrubbing tower.However, with the raising of the boat diesel engine thermal efficiency, the EGT (100 DEG C~240 after its turbine
DEG C) be difficult to meet SCR catalyst (V2O5-WO3/TiO2) normal work temperature window (260 DEG C~500 DEG C).Marine diesel
SO containing higher concentration in tail gasxIf not carrying out desulfurization process, SCR catalyst long-term work is in low temperature and containing higher
Concentration SOxGas in, it may occur that sulfur poisoning phenomenon, reduce SCR catalyst working life.If SCR system is arranged in into SOx
After scrubbing tower, because exhaust temperature is substantially reduced after desulfurization, it is also difficult to meet the temperature window of SCR system normal work.Always
It, by SCR and SOxThe method of scrubbing tower series connection, no matter SCR is in SOxBefore scrubbing tower or in SOxAfter scrubbing tower, to ship
Oceangoing ship exhaust pollution of diesel engines thing is processed all there is a problem that larger.
Generally, the selective catalytic reduction reaction for occurring in commercial SCR catalyst has three below：
4NO+4NH3+O2→4N2+6H2O (1)
2NO+2NO2+4NH3→4N2+6H2O (2)
6NO2+8NH3→7N2+12H2O (3)
Reaction (1) is reacted for standard SCR, at 260 DEG C~500 DEG C with reaction rate higher, can make turning for NOx
Rate reaches more than 90%.However, when even lower when temperature is reduced to below 200 DEG C, the reaction rate of the reaction is significantly
Degree declines.Reaction (2) is quick SCR reactions, reason is the reaction still have in lower temperature (100~200 DEG C) it is very high
Reaction rate.When temperature is more than 200 DEG C, react the reachable reaction (1) of chemical reaction rate of (2) more than 10 times.Due to
NO accounts for NO in diesel engine vent gasxThe major part of content, if NO of the SCR system to be improved under worst cold casexConversion ratio, can be to NOx
In NO pre-oxidized, adjustment NO in NOxIn shared ratio, make NO and NO2Ratio be 1:1 even NO2Content exceed
The content (considering that reaction (3) also has reaction rate higher under worst cold case) of NO.
Can be to the NO and SO in tail gas using lower temperature plasma technology2Pre-oxidized, formed nitric acid and sulfuric acid, be passed through
Ammonium salt can be generated after the ammonia generated by aqueous solution of urea evaporation, decomposition, so as to reach the purpose of desulphurization denitration.Diesel engine vent gas
Middle NOxAnd SOxContent have larger difference, NOxConcentration substantially in the range of 1000ppm~1500ppm, and SOxConcentration is substantially
In the range of 20ppm~600ppm, it is contemplated that the SO in tail gas2Also can directly and NH3Reaction generation hydrogen sulfate ammonia, works as SOxPass through
When plasma reaction is all removed just, substantial amounts of NO may be still suffered from tail gasx；If plasma reaction makes in tail gas
Whole NO is aoxidized and is generated ammonium salt with ammonia reaction, then the volume and energy consumption of plasma producing apparatus are larger, if reduce etc.
The volume and energy consumption of gas ions generating means then cause NOxTreatment is incomplete.When having noise reduction demand to diesel engine vent gas noise,
Cause that investment and floor space increase in the separately installed silencer of tail gas pipeline, therefore, preferred plan is by diesel oil tail
The desulphurization and denitration of gas, noise reduction and dedusting this Four processes are considered as a whole, and exploitation has multi-functional set composite.
Patent " method and device (application number 201310472661.X) of plasma integration desulfurization denitration dedusting "
Plasma producing apparatus are ionized using the electrode pair flue gas of netted chi structure, and the configuration plasma produces space
Small, density is relatively low, and in air-flow velocity, action time of the environment tail gas under high voltage electric field is short faster, and ionization effect is not
It is good.
Patent " a kind of boat diesel engine tail gas desulfurization denitrification integrated device (application number 201610293190.X) " uses U
The plasma producing apparatus of type structure, if the whole NO oxidations in making tail gas, the volume and energy consumption of plasma producing apparatus
It is larger, cause NO if the volume and energy consumption of plasma producing apparatus is reducedxTreatment is incomplete.
Patent " low temperature plasma pre-oxidation auxiliary NH3System (the application number of-SCR purification diesel engines NOx
200810041928.9) diesel engine vent gas " are pre-oxidized using low temperature plasma, promotes the quick SCR of generation in SCR device anti-
Should, its plasma producing apparatus is coaxial-type dielectric barrier discharge reactor, does not possess decrease of noise functions.
In above-mentioned document, have no that using plasma pre-oxidation joint SCR has desulphurization and denitration, noise reduction, dedusting multi-functional
Set composite.
The content of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of low temperature plasma pre-oxidation joint
SCR desulphurization denitration noise reduction dedusting set composites, save floor space and the investment of equipment, solve to be used alone under worst cold case
The NO that SCR denitration is presentxLow and SCR catalyst sulfur poisoning the problem of transformation efficiency, reduces exhaust emissions of diesel engine, is provided simultaneously with
Noise reduction and dedusting function.
The present invention is achieved through the following technical solutions：
A kind of low temperature plasma pre-oxidizes joint SCR desulphurization denitration noise reduction dedusting set composites, including：Low-temperature plasma
Body pre-oxidation device, urea supply vaporising device and SCR device；
Described low temperature plasma pre-oxidation device is to be separated into multiple expansion chambers by multiple electrodes plate in tubular, cylinder,
It is applied with battery lead plate on High Level AC Voltage, and every electrode plate and is inserted with an inner connecting tube, after last expansion chambers
Dust arrester is connected with, dust arrester lower section is provided with ash bucket and reject chute；
Described urea supply vaporising device includes urea flow container, urea pump, evaporator and spray ammonia nozzle, urea liquid warp
Pipeline flows through described urea pump and evaporator successively from described urea flow container, treats that urea liquid decomposes generation in evaporator
After ammonia, unit feeding ammonia is pre-oxidized to low temperature plasma by the spray ammonia nozzle being arranged in expansion chambers.
Further, two to three battery lead plates are installed in described low temperature plasma pre-oxidation device, make adjacent electrode
One to two expansion chambers, the side of battery lead plate or bilateral parcel dielectric layer are formed between plate, an inner connecting tube are inserted with battery lead plate,
Inner connecting tube on adjacent battery lead plate is staggered in 180 °, and the distance between adjacent battery lead plate is L, the length that inner connecting tube one end is stretched out
It is L/2 to spend, and the length that the other end stretches out is L/4.
Further, described low temperature plasma pre-oxidation device cylinder inwall parcel high temperature resistant, fire-retardant sound-absorbing material.
Further, before the ammonia access point of described urea supply vaporising device is located at last battery lead plate.
The principle of the invention is as follows：
Desulphurization denitration noise reduction dedusting is carried out to diesel engine vent gas using low temperature plasma pre-oxidation joint SCR.This is combined
Device includes that low temperature plasma pre-oxidizes device, urea supply vaporising device, dust arrester and ash bucket, SCR device；In low temperature etc.
Apply high voltage power supply on the battery lead plate of gas ions pre-oxidation device, diesel engine vent gas enter expansion by the inner connecting tube on battery lead plate
Room simultaneously ionizes inside it, produces substantial amounts of strong oxidative free radical O, OH plasmas, by NO and SO in tail gas2Part oxygen
Turn to NO2And SO3, improve NO2In NOxIn shared ratio, quick SCR reactions are realized in SCR device, improve worst cold case
SCR denitration rate；The NO in the presence of having vapor2And SO3Nitric acid and sulfuric acid can be further formed, and it is water-soluble with urea
The ammonia reaction generation ammonium salt aerosol of liquid evaporation, decomposition generation, soot dust granule and ammonium salt aerosol lotus in the presence of electric field
Electricity, the dust arrester pre-oxidized after device by being connected on low temperature plasma is removed.
Apply high voltage power supply on the battery lead plate of low temperature plasma pre-oxidation device, diesel engine vent gas are by battery lead plate
Inner connecting tube enter and expansion chambers and ionized inside it, the substantial amounts of strong oxidative free radical O of generation, OH plasmas, by tail gas
In NO and SO2Partial oxidation is NO2And SO3, improve NO2In NOxIn shared ratio, realize that quick SCR is anti-in SCR device
Should, improve the SCR denitration rate of worst cold case；The NO in the presence of having vapor2And SO3Nitric acid and sulphur can further be formed
Acid, and the ammonia reaction generation ammonium salt aerosol generated with aqueous solution of urea evaporation, decomposition, soot dust granule exist with ammonium salt aerosol
It is charged in the presence of electric field, removed by dust arrester.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, integrate desulphurization and denitration, noise reduction, dedusting multi-functional, floor space and the investment of equipment can be saved, solve low
The NO of SCR denitration presence is used alone under warm operating modexLow and SCR catalyst sulfur poisoning the problem of transformation efficiency；
2nd, can not only be to NOxAnd SOxEffectively processed, and the soot in diesel engine vent gas can be removed, and should
Technical work moderate temperature (100~200 DEG C), far below the exhaust temperature of diesel engine, it is not necessary to adjust diesel engine running parameter,
It is smaller to diesel engine work performance impact；
3rd, ionize tail gas using low temperature plasma pre-oxidation device and produce high mars free radical to NO and SO2Carry out oxygen
Change, due to NO and SO2Oxygenation efficiency and input electrical power have direct relation, be easy to precise control NO and SO2Oxygenation efficiency；
4th, low temperature plasma pre-oxidation device is only pre-oxidized to NO, therefore low temperature plasma pre-oxidation device
Volume is lower compared with the small volume of traditional plasma combined desulfurization and denitration technology, energy consumption；
5th, low temperature plasma pre-oxidation device of the invention is designed as an impedance composite muffler, can be to diesel engine
Tail gas is in whole frequency range noise reduction.
Brief description of the drawings
Fig. 1 is that the structure of low temperature plasma pre-oxidation joint SCR desulphurization denitration noise reduction dedusting set composites of the present invention is shown
It is intended to.
Fig. 2 is the structural representation of low temperature plasma pre-oxidation device of the invention and urea supply vaporising device.
Specific embodiment
The present invention is described in more detail with citing below in conjunction with the accompanying drawings：
With reference to Fig. 1 and Fig. 2, low temperature plasma pre-oxidation device sends out the tail gas of diesel engine 1 using dielectric barrier discharge
Raw ionization.Three battery lead plates 7 are installed in low temperature plasma pre-oxidation device, make to form two expansions between adjacent electrode plates 7
Room 8.Because diesel engine vent gas noise reduction should be mainly for high-frequency noise, therefore expansion chambers 8 are difficult the excessive of setting, it is to avoid high frequency is made an uproar
The effect on driving birds is not good of acoustic amplitude reduction, expansion chambers 8 can be set one to two in practical application.The bilateral parcel dielectric layer of battery lead plate 7
9, High Level AC Voltage 2 is applied on battery lead plate 7, the tail gas between battery lead plate 7 is breakdown to be ionized, and dielectric barrier discharge can be
Worked under the air pressure of 0.1bar~10bar, it is adaptable to diesel engine vent gas.An inner connecting tube 12, adjacent electrode are inserted with battery lead plate 7
Inner connecting tube 11 on plate 7 is staggered in 180 °, to increase residence time of the tail gas in low temperature plasma pre-oxidation device,
Tail gas is set to be adequately ionized under high voltage electric field.Low temperature plasma pre-oxidation device is designed as an impedance composite muffler,
The distance between its inwall parcel high temperature resistant, fire-retardant sound-absorbing material 10, adjacent battery lead plate 7 are L, and the one end of inner connecting tube 12 is stretched out
Length be L/2, the length that the other end stretches out be L/4, can be to the tail gas of diesel engine 1 in whole frequency range noise reduction.
Tail gas is ionized in the presence of high voltage electric field, produces substantial amounts of strong oxidative free radical O, OH plasmas, by tail
NO and SO in gas2Partial oxidation is NO2And SO3, the NO in the presence of having vapor2And SO3Nitric acid can further be formed
And sulfuric acid.Aqueous solution of urea evaporation feedway includes urea flow container 6, urea pump 5, evaporator 4 and spray ammonia nozzle 3, urea water
Solution is generated ammonia in evaporator 4 by thermal evaporation decomposition, with nitric acid and sulfuric acid reaction generation ammonium salt in second expansion chambers 8
Aerosol.Soot dust granule is charged in the presence of electric field with ammonium salt aerosol, by being connected on low temperature plasma pre-oxidation device
Dust arrester 11 afterwards is trapped and fallen in the presence of deadweight and vibration in the ash bucket 13 of lower section, and periodically ash bucket 13 is carried out
Cleaning, the soot dust granule and ammonium salt of collection are released to reject chute 14.
Flow through the tail gas after dust arrester and still contain substantial amounts of NOx, device is pre-oxidized to tail by the plasma of upstream
Gas carries out desulfurization, reduces SO in tail gasxToxic action to SCR catalyst, and increased NO2In NOxIn shared ratio
Example, makes quick SCR reactions in SCR device 15, the SCR denitration rate of worst cold case is improve, finally under SCR device 15
The tail gas that trip is purified.
The results showed, there is ionization and produce substantial amounts of strong oxidative free radical in diesel engine vent gas, in expansion chambers by tail gas
In NO and SO2Partial oxidation, forms nitric acid and sulfuric acid, and divide with aqueous solution of urea evaporation in the presence of having vapor
Solve the ammonia reaction generation ammonium salt aerosol of generation.Soot dust granule is charged in the presence of electric field with ammonium salt aerosol, by string
It is associated in the dust arrester removing after low temperature plasma pre-oxidation device.Device is pre-oxidized to tail gas by the plasma of upstream
Desulfurization is carried out, SO in tail gas is reducedxToxic action to SCR catalyst, and increased NO2In NOxIn shared ratio,
Make quick SCR reactions in SCR device, improve the SCR denitration rate of worst cold case, finally obtained only in SCR device downstream
The tail gas of change.
Claims (5)
1. a kind of low temperature plasma pre-oxidizes joint SCR desulphurization denitration noise reduction dedusting set composites, it is characterised in that including：
Low temperature plasma pre-oxidation device, urea supply vaporising device and SCR device；
Described low temperature plasma pre-oxidation device is to be separated into multiple expansion chambers by multiple electrodes plate in tubular, cylinder, in electricity
It is applied with pole plate on High Level AC Voltage, and every electrode plate and is inserted with an inner connecting tube, is connected after last expansion chambers
There is dust arrester, dust arrester lower section is provided with ash bucket and reject chute；
Described urea supply vaporising device includes urea flow container, urea pump, evaporator and spray ammonia nozzle, and urea liquid is through pipeline
Described urea pump and evaporator is flowed through successively from described urea flow container, treats that urea liquid decomposes generation ammonia in evaporator
Afterwards, the spray ammonia nozzle by being arranged in expansion chambers pre-oxidizes unit feeding ammonia to low temperature plasma.
2. low temperature plasma according to claim 1 pre-oxidizes joint SCR desulphurization denitration noise reduction dedusting set composites, its
It is characterised by, two to three battery lead plates is installed in described low temperature plasma pre-oxidation device, makes shape between adjacent electrode plates
Into one to two expansion chambers, the side of battery lead plate or bilateral wrap up dielectric layer.
3. low temperature plasma pre-oxidation joint SCR desulphurization denitration noise reductions dedusting according to claim 1 and 2 is compound fills
Put, it is characterised in that the inner connecting tube on adjacent battery lead plate is staggered in 180 °, the distance between adjacent battery lead plate is L, is inside connect
The length that pipe one end is stretched out is L/2, and the length that the other end stretches out is L/4.
4. low temperature plasma according to claim 1 pre-oxidizes joint SCR desulphurization denitration noise reduction dedusting set composites, its
It is characterised by, the cylinder inwall is enclosed with sound-absorbing material.
5. low temperature plasma according to claim 1 pre-oxidizes joint SCR desulphurization denitration noise reduction dedusting set composites, its
It is characterised by, before the ammonia access point of described urea supply vaporising device is located at last battery lead plate.
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| CN201611256827.4A CN106731831A (en) | 2016-12-30 | 2016-12-30 | A kind of low temperature plasma pre-oxidizes joint SCR desulphurization denitration noise reduction dedusting set composites |
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| CN201611256827.4A CN106731831A (en) | 2016-12-30 | 2016-12-30 | A kind of low temperature plasma pre-oxidizes joint SCR desulphurization denitration noise reduction dedusting set composites |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107138045A (en) * | 2017-06-12 | 2017-09-08 | 青岛双瑞海洋环境工程股份有限公司 | Marine exhaust processing unit for removing sulfur and nitrogen oxides simultaneously |
| CN107185316A (en) * | 2017-07-13 | 2017-09-22 | 中国石油大学(北京) | A kind of denitrating flue gas dedusting treater and processing method |
| CN107441898A (en) * | 2017-09-25 | 2017-12-08 | 绵阳欣隆源环保科技有限公司 | A kind of impulse electric corona plasma flue gas desulfurization and denitrification integrated apparatus |
| CN108579409A (en) * | 2018-04-04 | 2018-09-28 | 江苏华本环境科技有限公司 | A kind of SCR denitration method for flue gas under hot conditions |
| CN108579408A (en) * | 2018-04-04 | 2018-09-28 | 江苏华本环境科技有限公司 | A kind of low-temperature catalyzed denitration method for flue gas |
| CN111389190A (en) * | 2020-04-17 | 2020-07-10 | 大唐环境产业集团股份有限公司 | Plasma-based ship tail gas desulfurization and denitrification system and method |
| CN112604696A (en) * | 2020-11-20 | 2021-04-06 | 沪东重机有限公司 | Denitration catalyst for purifying tail gas of marine diesel engine and preparation method thereof |
| CN114320539A (en) * | 2020-10-10 | 2022-04-12 | 长城汽车股份有限公司 | Automobile exhaust aftertreatment device and automobile |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2040162U (en) * | 1988-10-25 | 1989-06-28 | 国营昆山五金厂 | Preheater of an automobile energy-saving purifier |
| CN2165230Y (en) * | 1993-06-04 | 1994-05-18 | 许仁忠 | Exhaust catalytic purifying muffler |
| JP2007196100A (en) * | 2006-01-25 | 2007-08-09 | Toyo Electric Mfg Co Ltd | Plasma type gas treatment device |
| US20080102010A1 (en) * | 2005-06-03 | 2008-05-01 | Emitec Gesellschaft Fur Emissionstechnologie Mbh | Method and Device for Treating Exhaust Gases of Internal Combustion Engines |
| CN101344026A (en) * | 2008-08-21 | 2009-01-14 | 上海交通大学 | System for low temperature plasma pre-oxidizing NOx of auxiliary NH3-SCR fine purification diesel engine |
| CN103566722A (en) * | 2013-10-11 | 2014-02-12 | 北京睿昱达科技有限公司 | Method and device for integrally desulfurizing, denitrating and dust-removing by plasma |
| CN105526649A (en) * | 2016-01-11 | 2016-04-27 | 广州市科帮空气净化科技有限公司 | Purification system for working room of highway toll station |
| CN206778192U (en) * | 2016-12-30 | 2017-12-22 | 中船动力研究院有限公司 | Low temperature plasma pre-oxidizes joint SCR desulphurization denitration noise reduction dedusting set composites |
-
2016
- 2016-12-30 CN CN201611256827.4A patent/CN106731831A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2040162U (en) * | 1988-10-25 | 1989-06-28 | 国营昆山五金厂 | Preheater of an automobile energy-saving purifier |
| CN2165230Y (en) * | 1993-06-04 | 1994-05-18 | 许仁忠 | Exhaust catalytic purifying muffler |
| US20080102010A1 (en) * | 2005-06-03 | 2008-05-01 | Emitec Gesellschaft Fur Emissionstechnologie Mbh | Method and Device for Treating Exhaust Gases of Internal Combustion Engines |
| JP2007196100A (en) * | 2006-01-25 | 2007-08-09 | Toyo Electric Mfg Co Ltd | Plasma type gas treatment device |
| CN101344026A (en) * | 2008-08-21 | 2009-01-14 | 上海交通大学 | System for low temperature plasma pre-oxidizing NOx of auxiliary NH3-SCR fine purification diesel engine |
| CN103566722A (en) * | 2013-10-11 | 2014-02-12 | 北京睿昱达科技有限公司 | Method and device for integrally desulfurizing, denitrating and dust-removing by plasma |
| CN105526649A (en) * | 2016-01-11 | 2016-04-27 | 广州市科帮空气净化科技有限公司 | Purification system for working room of highway toll station |
| CN206778192U (en) * | 2016-12-30 | 2017-12-22 | 中船动力研究院有限公司 | Low temperature plasma pre-oxidizes joint SCR desulphurization denitration noise reduction dedusting set composites |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107138045A (en) * | 2017-06-12 | 2017-09-08 | 青岛双瑞海洋环境工程股份有限公司 | Marine exhaust processing unit for removing sulfur and nitrogen oxides simultaneously |
| CN107185316A (en) * | 2017-07-13 | 2017-09-22 | 中国石油大学(北京) | A kind of denitrating flue gas dedusting treater and processing method |
| CN107441898A (en) * | 2017-09-25 | 2017-12-08 | 绵阳欣隆源环保科技有限公司 | A kind of impulse electric corona plasma flue gas desulfurization and denitrification integrated apparatus |
| CN108579409A (en) * | 2018-04-04 | 2018-09-28 | 江苏华本环境科技有限公司 | A kind of SCR denitration method for flue gas under hot conditions |
| CN108579408A (en) * | 2018-04-04 | 2018-09-28 | 江苏华本环境科技有限公司 | A kind of low-temperature catalyzed denitration method for flue gas |
| CN111389190A (en) * | 2020-04-17 | 2020-07-10 | 大唐环境产业集团股份有限公司 | Plasma-based ship tail gas desulfurization and denitrification system and method |
| CN111389190B (en) * | 2020-04-17 | 2024-02-09 | 大唐环境产业集团股份有限公司 | Plasma-based ship tail gas desulfurization and denitrification system and method |
| CN114320539A (en) * | 2020-10-10 | 2022-04-12 | 长城汽车股份有限公司 | Automobile exhaust aftertreatment device and automobile |
| CN114320539B (en) * | 2020-10-10 | 2022-12-27 | 长城汽车股份有限公司 | Automobile exhaust aftertreatment device and automobile |
| CN112604696A (en) * | 2020-11-20 | 2021-04-06 | 沪东重机有限公司 | Denitration catalyst for purifying tail gas of marine diesel engine and preparation method thereof |
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