CN108798842A - A kind of double fuel peculiar to vessel or natural gas engine escape methane processing unit and method - Google Patents
A kind of double fuel peculiar to vessel or natural gas engine escape methane processing unit and method Download PDFInfo
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- CN108798842A CN108798842A CN201810531103.9A CN201810531103A CN108798842A CN 108798842 A CN108798842 A CN 108798842A CN 201810531103 A CN201810531103 A CN 201810531103A CN 108798842 A CN108798842 A CN 108798842A
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- Prior art keywords
- vessel
- natural gas
- methane
- double fuel
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Classifications
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- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
A kind of double fuel peculiar to vessel of present invention offer or natural gas engine escape methane processing unit and method, including temperature sensor, plasma generator, electronic control unit and oxidation catalytic device；Double fuel or natural gas engine peculiar to vessel are connected by discharge duct with oxidation catalytic device, the plasma generator is mounted on discharge duct, and before oxidation catalytic device, the electronic control unit controls plasma generator according to the data of temperature sensor.Exhaust gas is discharged from double fuel peculiar to vessel or natural gas engine, and methane Primary Oxidation of escaping is obtained Primary Oxidation exhaust gas by plasma generator；Primary Oxidation exhaust gas enters back into oxidation catalytic device (6) and carries out secondary oxidative treatments, exhaust gas after secondary oxidative treatments, which is discharged into the air present invention, can be greatly lowered the discharge for a variety of environmental contaminants such as methane, HC, CO and volatile organic matter of escaping in ship double fuel peculiar to vessel or natural gas engine tail gas, and device volume is small and easy to maintain.
Description
Technical field
The present invention relates to a kind of double fuel peculiar to vessel or natural gas exhaust gas processing device and methods, more particularly to a kind of peculiar to vessel pair
Fuel or natural gas engine escape methane processing unit and method, belong to double fuel or natural gas engine exhaust-gas treatment peculiar to vessel
Technical field.
Background technology
As ship tail gas discharge endangers the increasingly strict of getting worse and IMO discharge standards to environment, the whole world is to clear
The demand of clean fuel is increasing.Natural gas, because is environmentally protective and cheap, starts to promote the use of on ship, double combustions peculiar to vessel
Material or natural gas engine have good development prospect.
The main component of natural gas is methane, has lower heat of combustion height, rich reserves, cheap, emission performance is good
Etc. advantages.As one of 21 century most important energy, it can guarantee that ship is reducing NOx and CO using natural gas as fuel2
While discharge, keep SOx discharges substantially zeroed.There is oxysulfide compared with low emission in double fuel peculiar to vessel or natural gas engine
Meanwhile methane of escaping in tail gas is urgently handled, in particular by the marine low-pressure double fuel or natural gas engine of Otto cycles.
Hydrocarbon (HC) is the predominant emissions of double fuel or natural gas engine, includes mainly methane and its derivative (formaldehyde
CH2O and methanol CH3OH) etc..
Methane in hydrocarbon is a kind of high calorific potential greenhouse gases, and warmization potentiality is bigger than carbon dioxide by 25
Times.The chemical bond that methane is stablized simultaneously needs very high activation energy to destroy C-H bond, so oxidizing of methylene molecule is required
Condition is very high, and temperature could effectively oxidation catalysis methane higher than 600 DEG C.Since double fuel peculiar to vessel or natural gas engine are discharged
Exhaust temperature it is relatively low, directly be difficult to remove escape methane therein using oxidation catalyzer.
There are problems that using traditional route for removing the methane in exhaust gas based on metallic catalyst oxidation catalysis:
(1) oxidizing temperature needed for it is higher, mostly at 500 DEG C or more；(2) water generated in oxidation process easily causes catalyst work
Property decline.These problems are still double fuel or natural gas engine peculiar to vessel and directly oxidation catalyst technologies are used to carry out tail gas at present
Problem in processing.
In the prior art, mainly have about the oxidation catalysis treatment technology of pollutant：
Patent " a kind of method of low-temperature plasma concerted catalysis oxidation various pollutants in fume " (CN106984148A),
It designs in the flue gas before solid catalysis oxidation catalyst and low temperature plasma is set, the flue gas after action of plasma is again
It is aoxidized by solid catalysis oxidation catalyst bed.But the system only relates to land power station coal pollutant process technology neck
Domain, device volume is excessive, can not be applied in the limited space of ship.Energy expenditure is big, land power station coal pollutant and ship
It is widely different with double fuel or natural gas engine exhaust gas component, so not being suitable for double fuel or natural gas engine tail peculiar to vessel
Gas disposal technical field, removal efficiency are limited.
Patent " a kind of double fuel/natural gas engine exhaust gas treating method and novel double fuel/natural gas engine "
(CN103696861 A) devises two branches：Turbine and exhaust gas oxidation catalyst device, exhaust gas oxidation catalyst are connected all the way
Processing unit is connected with exhaust pipe, and water temperature acquisition component, rotating speed acquisition component and throttle position are provided on diesel engine and is adopted
Collect component etc.；Another way connects cooler for recycled exhaust gas and valve.But the device is only applicable to stationary diesel engine and may not apply to peculiar to vessel low
Fast double fuel or natural gas engine, device are complicated.Oxidation catalytic device is directly installed additional, to marine low-speed double fuel or natural gas
The processing capacity of engine escape methane is limited, and is not easy to safeguard.
Difficult problem is handled simultaneously for double fuel peculiar to vessel or natural gas engine escape methane and multiple pollutant, this
A kind of method and device using low-temperature plasma synergistic oxidation catalyst technologies of disclosure of the invention, can with simultaneous oxidation methane,
A variety of environmental contaminants such as HC, CO and volatile organic matter (VOCs).Compared with traditional method, plasma body cooperative oxidation is urged
Change methane, reaction temperature is decreased obviously, the present invention can efficiently and stably be handled in a system methane, HC, CO and
A variety of environmental contaminants such as VOCs.
Invention content
A variety of environment such as methane, HC, CO and VOCs are efficiently and stably handled simultaneously the object of the present invention is to provide a kind of
The exhaust aftertreatment oxidation catalysis method and device of the double fuel or natural gas engine peculiar to vessel of pollutant.
The object of the present invention is achieved like this：
A kind of double fuel peculiar to vessel or natural gas engine are escaped methane processing unit, including temperature sensor 3, plasma hair
Raw device 4, electronic control unit 5 and oxidation catalytic device 6；Double fuel or natural gas engine 1 peculiar to vessel is urged by discharge duct 2 with oxidation
Makeup sets 6 and is connected, and the plasma generator 4 is mounted on discharge duct 2, and before oxidation catalytic device 6, described
Electronic control unit 5 controls plasma generator 4 according to the data of temperature sensor 3.
A kind of double fuel peculiar to vessel or natural gas engine are escaped methane processing method, are included the following steps：
a：Exhaust gas is discharged from double fuel peculiar to vessel or natural gas engine 1, by the oxidation and activation of plasma generator 4,
To escape methane Primary Oxidation, obtain Primary Oxidation exhaust gas；
b：Primary Oxidation exhaust gas enters back into oxidation catalytic device 6 and carries out secondary oxidative treatments, the reaction temperature for methane of escaping
Reduction is oxidized to CO2, the exhaust gas after secondary oxidative treatments is discharged into air.
The invention also includes some such features：
When the exhaust gas that double fuel peculiar to vessel or natural gas engine are discharged need not handle methane, control of electronic control unit 5 etc.
Ion generator 4 is closed, and low temperature plasma is not generated.
The reaction process of the present invention is as follows：
1, active constituent generates (R- hydrocarbon groups)
e+N2→e+N+N
e+O2→e+O+O
HC+O→RO+RO2+OH
O+O2→O3
2, escape methane subtractive process
Plasma+catalyst+CH4+O2→CO2+H2O
3, tail gas HC subtractive process
2HC+5O→2CO2+H2O
2HC+5/3O→2CO2+H2O
4, tail gas CO subtractive process
CO+O→CO2
CO+2OH→CO2+H2O
Compared with prior art, the beneficial effects of the invention are as follows：
(1) present invention can remove common oxidation using low-temperature plasma generator and the united method of oxidation catalyzer
The methane that catalyst converter cannot remove reduces double fuel or natural gas engine tail gas HC discharges peculiar to vessel and greenhouse gases row
It puts.
(2) using low-temperature plasma synergistic oxidation catalysis technique occurs for the present invention, can simultaneously efficient removal ship it is peculiar to vessel double
A variety of environmental contaminants such as methane in fuel or natural gas engine tail gas, HC, CO and volatile organic matter.
(3) plasma generator is located at except exhaust pipe of main engine of ship road, and package unit is small and easy to maintain, to ship
The influence very little of oceangoing ship host itself.
(4) methane need not be removed when double fuel peculiar to vessel or natural gas engine operate in fuel oil pattern or operating condition
When, plasma generator can be closed by electric control gear, can effectively reduce energy consumption, improve the economy that ship itself is runed.
Description of the drawings
Fig. 1 is the device of the invention system.
Specific implementation mode
Present invention is further described in detail with specific implementation mode below in conjunction with the accompanying drawings.
In conjunction with Fig. 1, wherein 1 is double fuel peculiar to vessel or natural gas engine, 2 be discharge duct, 3 be temperature sensor, 4 be
Plasma generator, 5 be electronic control unit, 6 be oxidation catalytic device.
The present invention provides a kind of double fuel peculiar to vessel that can remove a variety of environmental contaminants including methane or natural
The exhaust aftertreatment oxidation catalysis method and device of gas engine.The system is mutually tied by plasma generator with oxidation catalytic device
It closes, removes a variety of environmental contaminants including the inoxidizable methane of common oxidation catalyzer, to reduce ship tail gas dirt
Contaminate the discharge of object and greenhouse gases.
What the escape methane function of the present apparatus was realized in：Tail after the burning of double fuel or natural gas engine 1 peculiar to vessel
Gas initially enters in discharge duct 2, and plasma generator 4 is mounted on discharge duct 2, and before oxidation catalytic device 6.Electricity
It controls unit 5 and controls plasma generator 4 according to the data of the multiple sensors such as temperature sensor 3, according to the operation of marine engine
An appropriate number of plasma of operating mode generation, which enters in discharge duct 2, to react.Exhaust gas after the activation process for the first time of plasma,
The reaction temperature of escape methane can effectively be reduced.The tail gas activated for the first time enters oxidation catalytic device 6 and carries out secondary oxidation catalysis
Processing, can be greatly lowered a variety of environmental pollutions such as methane, HC, CO and VOCs in double fuel or natural gas engine tail gas peculiar to vessel
Object, the clean tail gas of final process discharge into air.
The present invention has following steps：
(1) plasma generator 4 is mounted on before oxidation catalytic device 6, and tail gas enters before oxidation catalytic device 6 first
The inoxidizable methane Primary Oxidation of common oxidation catalyzer is obtained into Primary Oxidation exhaust gas by plasma Primary Oxidation.
(2) Primary Oxidation exhaust gas exhaust gas enters back into oxidation catalysis dress after the processing of the Primary Oxidation of plasma generator 4
Set 6 carry out secondary oxidative treatments, can be greatly lowered simultaneously in this way methane in ship double fuel peculiar to vessel or natural gas engine tail gas,
A variety of environmental contaminants such as HC, CO and VOCs.
Double fuel or the natural gas engine exhaust gas peculiar to vessel is escaped after the processing of the primary activation of ion generator 4
The reaction temperature of methane of escaping reduces, in the case where the normal row of double fuel peculiar to vessel or natural gas engine is warm can by oxidation catalysis at
CO2, escape methane obtain secondary oxidative treatments.
For the primary purification exhaust gas after 6 secondary oxidation of oxidation catalytic device, methane, HC, CO and VOCs etc. are a variety of
Environmental contaminants can be cleaned processing, and the exhaust gas after secondary oxidation is discharged into air.
In conjunction with Fig. 1, when double fuel peculiar to vessel or natural gas engine operates in fuel oil pattern or engine operation condition is not required to
When handling methane, electronic control unit 5 controls plasma generator 4 and closes, and does not generate low temperature plasma, oxidation catalytic device 6
In tail gas that only double fuel or natural gas engine 1 peculiar to vessel generates flow through, oxidation CO, hydrocarbon can be completed at this time
(in addition to methane) and other pollutants, can effectively reduce energy consumption, improve the economy of operation of ship.
When double fuel peculiar to vessel or natural gas engine need to handle tail gas, electronic control unit 5 controls plasma generator 4 and beats
Open, generate low temperature plasma inject tail gas, 6 normal operation of oxidation catalytic device, can complete at this time methane, HC, CO and
The synergistic purification of a variety of environmental contaminants such as VOCs is handled, and the pollutant row of double fuel or natural gas engine peculiar to vessel is greatly reduced
It puts.
The present invention is illustrated by taking double fuel peculiar to vessel or natural gas engine escape methane processing as an example, actually of the invention
It is also applied for needing the other compositions of oxidation processes, patent claims equally applicable in ship tail gas.
Although having been combined embodiment herein, invention has been described, it is understood that, the present invention not office
Be limited to disclosed embodiment, but in the various combinations for equally covering its feature as defined in the appended claims or
Modification is already contained in some other applications in the scope of the present invention.
To sum up：Double fuel or natural gas engine peculiar to vessel escape first with plasma generator that the invention discloses a kind of
Alkane processing method and processing device, described device include double fuel or natural gas engine peculiar to vessel, discharge duct, temperature sensor, etc.
Ion generator, electronic control unit and oxidation catalytic device.Plasma generator is mounted on before exhaust pipe oxidation catalytic device, electricity
It controls unit and plasma generator is controlled according to the signal of the sensors such as temperature sensor, generate an appropriate number of plasma and enter
It reacts in exhaust gas.Exhaust gas enters oxidation catalytic device after the activation process of low-temperature plasma and carries out oxidation processes, real
The removing for methane of escaping in exhaust gas under lower temperature is showed.Ship double fuel peculiar to vessel or natural gas engine can be greatly lowered in the present invention
It escapes in tail gas the discharges of a variety of environmental contaminants such as methane, HC, CO and volatile organic matter, device volume is small and maintenance side
Just.
Claims (3)
- The methane processing unit 1. a kind of double fuel peculiar to vessel or natural gas engine are escaped, which is characterized in that including temperature sensor (3), plasma generator (4), electronic control unit (5) and oxidation catalytic device (6)；Double fuel or natural gas engine (1) peculiar to vessel It is connected with oxidation catalytic device (6) by discharge duct (2), the plasma generator (4) is mounted on discharge duct (2) And before oxidation catalytic device (6), the electronic control unit (5) controls plasma according to the data of temperature sensor (3) and sends out Raw device (4).
- The methane processing method 2. a kind of double fuel peculiar to vessel or natural gas engine are escaped, which is characterized in that include the following steps：a：Exhaust gas is discharged from double fuel peculiar to vessel or natural gas engine (1), by the oxidation and activation of plasma generator (4), To escape methane Primary Oxidation, obtain Primary Oxidation exhaust gas；b：Primary Oxidation exhaust gas enters back into oxidation catalytic device (6) and carries out secondary oxidative treatments, the reaction temperature drop for methane of escaping It is low to be oxidized to CO2, the exhaust gas after secondary oxidative treatments is discharged into air.
- The methane processing method 3. a kind of double fuel peculiar to vessel according to claim 2 or natural gas engine are escaped, feature Be, when the exhaust gas that double fuel peculiar to vessel or natural gas engine are discharged need not handle methane, electronic control unit (5) control etc. from Electronic generator (4) is closed, and low temperature plasma is not generated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810375540 | 2018-04-25 | ||
| CN2018103755406 | 2018-04-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108798842A true CN108798842A (en) | 2018-11-13 |
Family
ID=64090689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810531103.9A Pending CN108798842A (en) | 2018-04-25 | 2018-05-29 | A kind of double fuel peculiar to vessel or natural gas engine escape methane processing unit and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108798842A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282908A (en) * | 2020-10-28 | 2021-01-29 | 哈尔滨工程大学 | Aftertreatment system for controlling methane escape by marine low-pressure dual-fuel engine |
| CN115945066A (en) * | 2022-11-28 | 2023-04-11 | 中国船舶集团有限公司第七一一研究所 | Desulfurization and demethanization device and method for flue gas of double ship fuel machines |
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| CN2603211Y (en) * | 2002-12-20 | 2004-02-11 | 中国人民解放军军事交通学院 | Low temp plasma purifier for exhausted pollutant of diesel engine |
| WO2008071624A1 (en) * | 2006-12-12 | 2008-06-19 | Renault S.A.S. | Device for processing the methane contained in the exhaust gases of an internal combustion engine and related method |
| FR2918581A1 (en) * | 2007-07-09 | 2009-01-16 | Renault Sas | Methane treating device for diesel engine of vehicle, has catalytic unit mounted in manner such that catalytic unit is in contact with part of plasma produced by plasma reactor, and in contact with part of methane emitted by engine |
| CN104179552A (en) * | 2014-09-10 | 2014-12-03 | 中投仙能科技（苏州）有限公司 | Automobile tail gas treatment device and method based on low-temperature plasma |
| US20160175776A1 (en) * | 2014-12-19 | 2016-06-23 | Robert Bosch Gmbh | Method for operating an exhaust gas after-treatment system for an internal combustion engine |
-
2018
- 2018-05-29 CN CN201810531103.9A patent/CN108798842A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2603211Y (en) * | 2002-12-20 | 2004-02-11 | 中国人民解放军军事交通学院 | Low temp plasma purifier for exhausted pollutant of diesel engine |
| WO2008071624A1 (en) * | 2006-12-12 | 2008-06-19 | Renault S.A.S. | Device for processing the methane contained in the exhaust gases of an internal combustion engine and related method |
| FR2918581A1 (en) * | 2007-07-09 | 2009-01-16 | Renault Sas | Methane treating device for diesel engine of vehicle, has catalytic unit mounted in manner such that catalytic unit is in contact with part of plasma produced by plasma reactor, and in contact with part of methane emitted by engine |
| CN104179552A (en) * | 2014-09-10 | 2014-12-03 | 中投仙能科技（苏州）有限公司 | Automobile tail gas treatment device and method based on low-temperature plasma |
| US20160175776A1 (en) * | 2014-12-19 | 2016-06-23 | Robert Bosch Gmbh | Method for operating an exhaust gas after-treatment system for an internal combustion engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282908A (en) * | 2020-10-28 | 2021-01-29 | 哈尔滨工程大学 | Aftertreatment system for controlling methane escape by marine low-pressure dual-fuel engine |
| CN115945066A (en) * | 2022-11-28 | 2023-04-11 | 中国船舶集团有限公司第七一一研究所 | Desulfurization and demethanization device and method for flue gas of double ship fuel machines |
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Application publication date: 20181113 |
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