CN207111206U - NOX SNCR device in a kind of engine of boat and ship exhaust contaminant - Google Patents
NOX SNCR device in a kind of engine of boat and ship exhaust contaminant Download PDFInfo
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- CN207111206U CN207111206U CN201721040625.6U CN201721040625U CN207111206U CN 207111206 U CN207111206 U CN 207111206U CN 201721040625 U CN201721040625 U CN 201721040625U CN 207111206 U CN207111206 U CN 207111206U
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Abstract
The utility model discloses the SNCR device of NOX in engine of boat and ship exhaust contaminant a kind of, including particulate matter filter device, SNCR reactors, secondary reactor, sprayer, NOX sensor, ECU, multistage reactor and catalysis oxidation/reduction apparatus, gas heater, gas pressure buffer unit and bromine cooling machine, the particulate matter filter device is fixedly mounted on the end of tail gas discharging pipe, multistage reactor is sealingly mounted at the outlet side of pellet thing filter, multistage reactor is made up of SNCR reactors and secondary reactor, the device structure is simple, small volume, it is in light weight, more for practicality, and energy-saving and emission-reduction can be realized, avoid environmental pollution and the unnecessary waste of the energy.
Description
Technical field
Vent gas treatment field is the utility model is related to, more particularly, to NOX in a kind of engine of boat and ship exhaust contaminant
SNCR device.
Background technology
Shipping industrial development is rapid, turns into the main force of logistics, cargo handling capacity 107.8 is completed at national harbour within 2015
Hundred million tons, wherein foreign trade handling capacity is 38 and 51 times in 1978 respectively, the traffic of a port keeps generation for years up to 30.6 hundred million tons
Boundary first.
But marine diesel exhaust emissions：Emission harm is big, discharge capacity is big, seriously polluted.Contain in the exhaust of ship machine
The exhaust contaminants such as carbon monoxide, hydrocarbon, oxynitrides, sulfur dioxide, particulate matter.American National Environmental Protection Agency is by bavin
40 multiple compounds of oil machine discharge have been included in " Hazardous Air Polluant inventory "（HAPs）, such as：Formaldehyde, acetaldehyde, 1,3- fourths
The compound of the metal such as diene, benzene, multiring aromatic hydrocarbon and arsenic, lead, mercury, manganese.
In relevant laws and regulations, for environmental requirement, state's laws, regulation improve emission request.Such as atmosphere pollution is prevented
Therapy》Formally implement etc. a series of relevant laws and regulations, Environmental Protection Department is formally issued《Engine of boat and ship tailpipe emission
Limit value and measuring method（Chinese first and second stage）》（GB15097-2016）.
But ship tail gas Study on treatment technology present situation：Foreign countries' monopolization, domestic blank.The mark administered by domestic ship tail gas
It is accurate and backward in technique, to be compared with developed country, GB15097-2016 first stage is suitable with the standard that current Europe is implemented,
The standard that second stage and U.S.'s phase III implement is suitable.
Diesel oil used in diesel engine contains the oily substance of a large amount of high-flashes, causes it to be burnt in cylinder of diesel engine far
Be far from light oil thoroughly, this result in containing a large amount of poisonous and harmful substances in tail gas, include carbon monoxide, sulfur dioxide, nitrogen oxygen
Compound, hydrocarbon, or even also have the material of still unburned microlayer model oils and class pitch.These materials enter rear class
SNCR devices in, the blocking of the ceramic catalyst in SNCR devices can be caused, substantially reduce its service life, make price high
Ceramic catalyst failure scrap.In addition, carrying out reaction with nitrogen oxides using ammonia in SNCR devices removes denitrification, but
It is unstability of the ammonia due to its own, causes potential safety hazard be present during use.
Utility model content
The utility model is to overcome the above situation insufficient, it is desirable to provide a kind of technical scheme that can be solved the above problems.
NOX SNCR device in a kind of engine of boat and ship exhaust contaminant, including particulate matter filtering dress
Put, SNCR reactors, secondary reactor, sprayer, NOX sensor, ECU, multistage reactor and catalysis oxidation/reduction
Device, gas heater, gas pressure buffer unit and bromine cooling machine, the particulate matter filter device are fixedly mounted on exhaust emissions
The end of pipe, multistage reactor are sealingly mounted at the outlet side of pellet thing filter, multistage reactor by SNCR reactors and
Secondary reactor is formed, and catalysis oxidation/reduction apparatus is made up of SNCR reactors, sprayer, NOX sensor and ECU,
The gas outlet of particulate matter filter device is connected with the air inlet of gas heater, the gas outlet of gas heater by pipeline with
Gas pressure buffer unit is connected, and gas pressure buffer unit is connected with multistage reactor, the end of multistage reactor with
Bromine cooling machine connects.
As further program of the utility model：The first thermometer, gas pressure are fixedly mounted on the gas heater
Second temperature meter and pressure gauge are fixedly mounted on power buffer unit.
As the utility model further scheme：Pipeline, one end connection of pipeline are provided with the SNCR reactors
In the container equipped with urea liquid, the other end of pipeline is connected through SNCR reactors and with the water inlet of sprayer, sprays
Day with fog uses material metering sprayer.
As the utility model further scheme：The NOX sensor is fixedly mounted on the air inlet of SNCR reactors
End is internal.
As the utility model further scheme：SNCR reactors are provided with mounting groove, the fixed peace of ECU ()
In the mounting groove of SNCR reactors, and ECU is electrically connected with NOX sensor, sprayer.
As the utility model further scheme：The secondary reactor is sealingly mounted at the outlet of SNCR reactors
At mouthful.
As the utility model further scheme：Sealing company is carried out by ring flange between the multistage reactor
Connect.
As the utility model further scheme：The particulate matter filter device be for remove PM. levels and more than
The grain bed of particulate matter.
Compared with prior art, the beneficial effects of the utility model are：
NOX SNCR device in a kind of engine of boat and ship exhaust contaminant of the embodiment of the present invention, will
Urea liquid is directly through in the SNCR reactors in pipelined to catalysis oxidation/reduction apparatus so that urea liquid and high temperature
Tail gas is sufficiently mixed, and so as to produce gaseous ammonia and biuret, thus generates dress without the gaseous ammonia that prior art is commonly used
Put, instead of in selective catalytic reduction and be made up of huge equipment such as ammonia evaporator, ammonia surge tank, gas flow valves
Gaseous ammonia generating means, this is sayed for most of for mobile pollution source diesel engine, tail gas clean-up system provided by the present invention
The structure of system is simple, small volume, in light weight, more for practicality.In addition, also add secondary reactor, to carbon monoxide with
Hydro carbons carries out effective catalysis reduction, reaches the purpose reliably purified.
Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description
In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, before creative labor is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the SNCR device of NOX in engine of boat and ship exhaust contaminant.
In figure：It is particulate matter filter device 1, SNCR reactors 2, secondary reactor 3, sprayer 4, NOX sensor 5, automatically controlled
Unit 6, multistage reactor 7 and catalysis oxidation/reduction apparatus 8, gas heater 9, gas pressure buffer unit 10, bromine cooling machine
11st, the first thermometer 12, second temperature meter 13 and pressure gauge 14.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Referring to Fig. 1, in the utility model embodiment, NOX selectivity is non-in a kind of engine of boat and ship exhaust contaminant
Catalytic reduction device, referring to Fig. 1, in a kind of engine of boat and ship exhaust contaminant NOX SNCR device, bag
It is anti-to include particulate matter filter device 1, SNCR reactors 2, secondary reactor 3, sprayer 4, NOX sensor 5, ECU 6, multistage
Answer device 7 and catalysis oxidation/reduction apparatus 8, gas heater 9, gas pressure buffer unit 10, bromine cooling machine 11, the first thermometer
12nd, second temperature meter 13 and pressure gauge 14, the particulate matter filter device 1 are fixedly mounted on the end of tail gas discharging pipe, multistage
Reactor 7 is sealingly mounted at the outlet side of pellet thing filter 1, and multistage reactor 7 is by SNCR reactors 2 and secondary reactor
3 compositions, catalysis oxidation/reduction apparatus 8 are made up of SNCR reactors 2, sprayer 4, NOX sensor 5 and ECU 6, particle
The gas outlet of thing filter 1 is connected with the air inlet of gas heater 9, the gas outlet of gas heater 9 by pipeline with
Gas pressure buffer unit 10 is connected, and gas pressure buffer unit 10 is connected with multistage reactor 7, multistage reactor 7
End is connected with bromine cooling machine 11.
The first thermometer 12 is fixedly mounted on the gas heater 9, is fixedly mounted on gas pressure buffer unit 10
Two thermometers 13 and pressure gauge 14.
The particulate matter filter device 1 is grain bed, for removing the particulate matter of PM2.5 levels and the above；The catalysis oxygen
Change/reduction apparatus 8 is multistage reactor 7, for removing denitrification, carbon monoxide and hydro carbons.
Preferably, the non-catalytic oxidation/reduction apparatus includes the SNCR reactors 2 for removing denitrification, the SNCR
Converter and sprayer 4 are provided with reactor 2, the sprayer 4 is used to spray urea liquid into the SNCR reactors 2.
Pipeline is provided with the SNCR reactors 2, by the urea liquid through pipelined to sprayer 4, so as to enter
Enter the inside of the SNCR reactors 2, urea liquid is changed into by microlayer model state and abundant with high-temperature tail gas by air-stream spraying
Mixing, the urea in urea liquid in the presence of high-temperature tail gas are heated to rapidly more than 160 DEG C and then decomposed, and produce gaseous state
Ammonia（NH3）And biuret（CONH）, wherein gaseous ammonia（NH3）By under the high temperature conditions with the nitrogen oxides in tail gas（Including NO
And NO2）Chemically react：This method is that the reducing agent containing NHx bases is sprayed into the area that fire box temperature is 850 DEG C ~ 1100 DEG C
Behind domain, rapid thermal decomposition carries out SNCR reactions with the NOx in flue gas and generates N2 into NH3 and other accessory substances, subsequent NH3.
4NH3+4NO+O2→4N2+6H2O
4NH3+2NO+2O2→3N2+6H2O
8NH3+6NO2→7N2+12H2O
And use urea as reducing agent reduction NOx main chemical reactions for:
(NH2)2CO→2NH2+CO
NH2+NO→N2+H2O
CO+NO→N2+CO2
SNCR reduction NO reaction is very sensitive for temperature conditionss, the selection of SNCR reaction gas temperature, that is, so-called
Temperature window selection, be SNCR reduction NO efficiencies key.It is generally acknowledged that preferably temperature range be 850 DEG C ~
1100 DEG C, and it is different with the change of type of reactor.When reaction temperature is less than temperature window, due to the residence time
Limitation, often carry out chemical reaction not abundant enough, so as to cause NO percent reduction relatively low, while the NH3 for having neither part nor lot in reaction increases
Add the escape that will also result in ammonia, run into SO2 meeting NH4HSO4 and (NH4) 2SO4, easily cause air preheater blocking, and have corruption
The danger of erosion.And when reaction temperature is higher than temperature window, NH3 oxidation reaction starts to play a leading role:
4NH3+5O2→4NO+6H2O
So as to which NH3 effect, which turns into, aoxidizes and generate NO, rather than reduction NO is N2.How suitable temperature strip is chosen
Part takes into account the key for reducing the leakage of reducing agent as SNCR technologies successful application simultaneously.
While above-mentioned denitration process, under high temperature and catalytic condition, carbon monoxide and nitrogen oxygen in tail gas gaseous mixture
Compound（Including NO and NO2）The following chemical reaction of generation：
2CO+2NO+O2=2CO2 + N2
4CO+2NO2=4CO2 + N2
The catalysis reduction for so realizing nitrogen oxides removes, while also removes substantial amounts of carbon monoxide, tail gas clean-up
Positive effect.
It is understood that the content into the nitrogen oxides in reactor is the moment in change, because diesel engine
Operation conditions is different, and caused nitrogen oxides is also inevitable different, then purifies these major pollutants i.e. nitrogen oxygen
It is gaseous ammonia and different needed for compound.For this case, inventor the SNCR reactors 2 inlet end also
It is that the place that tail gas is discharged into is provided with NOX sensor 5, it is described for the content of NOX in detecting into the tail gas of SNCR reactors 2
The aperture of sprayer 4 is adjusted according to the detection signal of NOX sensor 5.
, just must be according to diesel engine condition in order to avoid urea liquid emitted dose deficiency or urea liquid overspray（Turn
Speed and the difference of load cause the nitrous oxides concentration difference contained in the flow difference of tail gas, its tail gas）Change, change immediately
Become the urea liquid overspray into exhaust gas cleaner, because injection rate of the gaseous ammonia in tail gas depends entirely on urea
The concentration and injection rate of solution, and urea concentration controls very well, as long as urea liquid emitted dose can be adjusted accurately.
Further, the sprayer 4 is used into material metering sprayer 4, with reference to urea concentration, by the SNCR reactors 2
ECU 6 carries out automatically controlled spraying.After the detection signal of the NOX sensor 5 delivers to ECU 6, information processing is carried out,
Then the ECU 6 sends control signal again, the urea liquid amount for controlling the material metering sprayer 4 to be sprayed.
A certain amount of carbon monoxide has above been eliminated in SNCR reactors 2, but may also have residual, therefore can
The secondary reactor 3 for removing carbon monoxide and hydro carbons, the secondary reaction are set again in the non-catalytic oxidation/reduction apparatus
The inlet end of device 3 is connected with the outlet side of the SNCR reactors 2, that is, is arranged on the rear end of SNCR reactors 2
Operation principle of the present utility model is：
High-temperature gas in blast pipe enters in particulate matter filter device 1, makes the PM2.5 and above particulate matter mistake in tail gas
Filter, the gas after filtering by conduit and are entered in gas heater 9, and tail gas carries out being heated to closing in gas heater 9
Thermophilic degree, after tail gas is heated, due to constancy of volume, therefore tail gas pressure increases, if the gas of very big pressure is passed directly into
Service life of equipment is easily reduced into multistage reactor 7, therefore, HTHP tail gas enters by gas pressure buffer unit 10
Row buffering, tail gas are entered in multistage reactor 7 by buffering and reacted with urea liquid under catalytic temperature, so as to
Enough effective nitrogen oxides removed in tail gas, last treated tail gas are discharged into air after the cooling of bromine cooling machine 11.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation
Involved claim.
Claims (8)
1. NOX SNCR device in a kind of engine of boat and ship exhaust contaminant, including particulate matter filter device
(1), SNCR reactors (2), secondary reactor (3), sprayer (4), NOX sensor (5), ECU (6), multistage reactor
(7) and catalysis oxidation/reduction apparatus (8), gas heater (9), gas pressure buffer unit (10) and bromine cooling machine (11), it is special
Sign is that the particulate matter filter device (1) is fixedly mounted on the end of tail gas discharging pipe, multistage reactor (7) sealing installation
In the outlet side of pellet thing filter (1), multistage reactor (7) is made up of SNCR reactors (2) and secondary reactor (3),
Catalysis oxidation/reduction apparatus (8) is made up of SNCR reactors (2), sprayer (4), NOX sensor (5) and ECU (6),
The gas outlet of particulate matter filter device (1) is connected with the air inlet of gas heater (9), the gas outlet of gas heater (9)
It is connected by pipeline with gas pressure buffer unit (10), gas pressure buffer unit (10) is connected with multistage reactor (7)
Connect, the end of multistage reactor (7) is connected with bromine cooling machine (11).
2. NOX SNCR device in engine of boat and ship exhaust contaminant according to claim 1, it is special
Sign is, the first thermometer (12) is fixedly mounted on the gas heater (9), peace is fixed on gas pressure buffer unit (10)
Fill second temperature meter (13) and pressure gauge (14).
3. NOX SNCR device in engine of boat and ship exhaust contaminant according to claim 1, it is special
Sign is, is provided with pipeline in the SNCR reactors (2), one end of pipeline is connected in the container equipped with urea liquid, pipeline
The other end through SNCR reactors (2) and being connected with the water inlet of sprayer (4), sprayer (4) uses material metering sprayer.
4. NOX SNCR device in engine of boat and ship exhaust contaminant according to claim 1, it is special
Sign is that the NOX sensor (5) is fixedly mounted on inside the inlet end of SNCR reactors (2).
5. NOX SNCR device in the engine of boat and ship exhaust contaminant according to claim 1 or 3,
Characterized in that, SNCR reactors (2) are provided with mounting groove, ECU (6) is fixedly mounted on the installation of SNCR reactors (2)
In groove, and ECU (6) is electrically connected with NOX sensor (5), sprayer (4).
6. NOX SNCR device in engine of boat and ship exhaust contaminant according to claim 1, it is special
Sign is that the secondary reactor (3) is sealingly mounted at the gas outlet of SNCR reactors (2).
7. NOX SNCR device in engine of boat and ship exhaust contaminant according to claim 1, it is special
Sign is, is connected and sealed between the multistage reactor (7) by ring flange.
8. NOX SNCR device in engine of boat and ship exhaust contaminant according to claim 1, it is special
Sign is that the particulate matter filter device (1) is the grain bed for removing PM2.5 levels and above particulate matter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721040625.6U CN207111206U (en) | 2017-08-19 | 2017-08-19 | NOX SNCR device in a kind of engine of boat and ship exhaust contaminant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721040625.6U CN207111206U (en) | 2017-08-19 | 2017-08-19 | NOX SNCR device in a kind of engine of boat and ship exhaust contaminant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207111206U true CN207111206U (en) | 2018-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721040625.6U Active CN207111206U (en) | 2017-08-19 | 2017-08-19 | NOX SNCR device in a kind of engine of boat and ship exhaust contaminant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207111206U (en) |
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2017
- 2017-08-19 CN CN201721040625.6U patent/CN207111206U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230727 Address after: A701, Jieshun Technology Center, No. 5, Guansheng Second Road, Luhu Community, Guanhu Street, Longhua District, Shenzhen, Guangdong 518000 Patentee after: SHENZHEN CITY EMPAER TECHNOLOGY CO.,LTD. Address before: 215400 Shuimukang Bridge, Main Building, No. 6, Beijing West Road, Taicang Science and Technology Pioneer Park, Chengxiang Town, Taicang City, Suzhou City, Jiangsu Province Patentee before: SUZHOU SHUIMU KANGQIAO ENVIRONMENT ENGINEERING TECHNOLOGY CO.,LTD. |
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| TR01 | Transfer of patent right |