CN106881018A - Removal of nitrogen oxide device and the method using its removing nitrogen oxides - Google Patents
Removal of nitrogen oxide device and the method using its removing nitrogen oxides Download PDFInfo
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- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
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- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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Abstract
The present invention provides a kind of removal of nitrogen oxide device and the method using its removing nitrogen oxides, gas combustion heaters ignition is passed through by by hydrogen and compressed air, oxides of nitrogen gas elimination reaction device is set to be warming up to 270 DEG C ~ 280 DEG C in advance, oxides of nitrogen gas removing filter is not passed sequentially through by the tail gas that nitric acid absorber absorbs during prepared by phosphatic hydroxylamine method into caprolactam technology again, gas heater, gas combustion heaters are passed through in oxides of nitrogen gas elimination reaction device, reacted under catalyst action with ammonia, form the discharge gas containing nitrogen and vapor, this process occurs without any time neutral, reduce the concentration of nitrogen oxides in discharge gas, so that nitrous oxides concentration ＜ 200mg/m in discharge gas3, discharge gas environment protection standard.
Description
Technical field
The present invention relates to chemical industry equipment, more particularly to removal of nitrogen oxide device and the method using its removing nitrogen oxides.
Background technology
NOxIt is one of air primary pollution source, NOxIncluding N2O、NO、NO2、 N2O4、N2O5、N2O8Deng.NOxGas can cause human body poisoning, plant damage, acid rain acid mist etc. essentially from the industrial waste gases such as fossil fuel, Coal Chemical Industry, nitric acid, plating and vehicle exhaust, and can form chemical fumes with hydrocarbon, cause depletion of the ozone layer.What China formulated《Discharge standard of air pollutants》（GB16297-1996）, to NOxDischarge capacity carried out strict limitation, it is 240mg/m that highest allows concentration of emission3。
Phosphatic hydroxylamine（HPO）Device absorbs in the reaction of operation generation nitrate because of ammoxidation, and nitrous acid gas can not be fully converted to HNO3, a large amount of unabsorbed nitrogen oxides are contained in tail gas（NOx）Gas.NOxGas through denitration reaction process it is up to standard after discharge, but traditional HPO methods prepare the NO of caprolactamxThere is unstable or driving and parking operation in removing means operation, can still result in exhaust emissions NOxIt is exceeded.
Denitration technology is broadly divided into wet method and the major class of dry method two.Commercial plant removes NOxMain technique generally use SNCR technology SNCR and SCR technology SCR.SNCR and SCR technology are mainly when not having or having catalyst, and NOx is optionally reduced into H2O and N2, SNCR removal efficiencies are that 50% ~ 60%, SCR removal efficiencies are 60% ~ 90%.Traditional HPO methods prepare the NO of caprolactamxRemoving means uses SCR technology.
However, traditional HPO methods prepare the NO of caprolactamxRemoving means is that burning gases heater is lighted a fire again, because of NO after ammoxidation drives to stablizexGas removal reactor can not be rapidly heated to reaction temperature, tail gas NOxCan not effectively remove, cause each device driving overhead emission NOxConcentration over-standard（NOxConcentration ＞ 200mg/m3）, atmospheric environment is heavily contaminated, is detrimental to health.Emission NOxConcentration over-standard turns into the problem of puzzlement plant running.
The content of the invention
Based on this, it is necessary to prepare the removal of nitrogen oxide device of caprolactam, exhaust emissions NO for traditional HPO methodsxA kind of exceeded problem, there is provided exhaust emissions NOxThe removal of nitrogen oxide device of environment protection standard.
Additionally, the present invention also provides a kind of method that nitrogen oxides is removed using above-mentioned removal of nitrogen oxide device.
A kind of removal of nitrogen oxide device, the nitrogen oxides produced in caprolactam technology is prepared for removing phosphatic hydroxylamine method, and the removal of nitrogen oxide device includes：
Oxides of nitrogen gas removes filter, for phosphatic hydroxylamine method to be prepared the tail gas cohesion not absorbed by nitric acid absorber in caprolactam technology, removes nitric acid fog, obtains filtering gas；
The gas heater connected with oxides of nitrogen gas removing filter, for high steam as thermal source, the filtering gas and high steam being exchanged heat, the tail gas after being heated；
The gas combustion heaters connected with the gas heater, for will continue to heat to the tail gas after the heating after hydrogen and compressed air ignition, obtain combustion tail gas；
The air line connected with the gas combustion heaters, for providing the compressed air；
The hydrogen gas lines connected with the gas combustion heaters, for providing the hydrogen；
The oxides of nitrogen gas elimination reaction device connected with the gas combustion heaters, for the combustion tail gas and ammonia to be reacted under catalyst action, form the discharge gas containing nitrogen and vapor, nitrous oxides concentration ＜ 200mg/m in the discharge gas3；
The ammonia pipeline connected with the oxides of nitrogen gas elimination reaction device, for providing the ammonia.
Wherein in one embodiment, the hydrogen gas lines include hydrogen exhaust pipe and auxiliary hydrogen gas lines, and the hydrogen exhaust pipe prepares the hydrogeneous tail-gas of azanol operation generation in caprolactam technology for providing phosphatic hydroxylamine method, the auxiliary hydrogen gas lines, for provided auxiliary hydrogen.
Wherein in one embodiment, the air line is provided with flow and indicates control valve, the hydrogen gas lines are provided with proportion adjustment control valve, the gas combustion heaters are provided with temperature and indicate control valve near one end of outlet, and the temperature indicates control valve, proportion adjustment control valve and flow to indicate interlocked control between control valve.
Wherein in one embodiment, the removal of nitrogen oxide device also includes the air compressor turbine connected with the oxides of nitrogen gas elimination reaction device, for will enter air after the discharge gas acting containing nitrogen and vapor.
A kind of method that nitrogen oxides is removed using above-mentioned removal of nitrogen oxide device, is comprised the following steps：
Hydrogen and compressed air are provided；
The hydrogen and compressed air are passed through the gas combustion heaters ignition, the oxides of nitrogen gas elimination reaction device is warming up to 270 DEG C ~ 280 DEG C in advance；
Phosphatic hydroxylamine method is provided and prepares the tail gas not absorbed by nitric acid absorber in caprolactam technology；
The tail gas is passed through the oxides of nitrogen gas removing filter, by cohesion, nitric acid fog is removed, obtains filtering gas；
The filtering gas is passed through the gas heater, with high steam as thermal source, the filtering gas and high steam is exchanged heat, the tail gas after being heated；
Tail gas after the heating is passed through the gas combustion heaters, the hydrogen continues to heat with compressed air ignition to the tail gas after the heating, obtains combustion tail gas；
Ammonia is provided；
The ammonia and combustion tail gas are passed through the oxides of nitrogen gas elimination reaction device for being warming up to 270 DEG C ~ 280 DEG C in advance, the ammonia and combustion tail gas react under catalyst action, form the discharge gas containing nitrogen and vapor, nitrous oxides concentration ＜ 200mg/m in the discharge gas3。
Wherein in one embodiment, the ammonia and combustion tail gas are passed through the oxides of nitrogen gas elimination reaction device for being warming up to 270 DEG C ~ 280 DEG C in advance, the ammonia and combustion tail gas react under catalyst action, form the discharge gas containing nitrogen and vapor, nitrous oxides concentration ＜ 200mg/m in the discharge gas3The step of after, it is further comprising the steps of：
Air is entered after the discharge gas containing nitrogen and vapor is passed through into the acting of air compressor turbine.
Wherein in one embodiment, it is described provide hydrogen and compressed air the step of in, the hydrogen source in phosphatic hydroxylamine method prepares caprolactam technology azanol operation produce hydrogeneous tail-gas.
Wherein in one embodiment, it is described provide hydrogen and compressed air the step of in, the hydrogen also from auxiliary hydrogen.
Above-mentioned removal of nitrogen oxide device and the method using its removing nitrogen oxides, gas combustion heaters ignition is passed through by by hydrogen and compressed air, oxides of nitrogen gas elimination reaction device is set to be warming up to 270 DEG C ~ 280 DEG C in advance, oxides of nitrogen gas removing filter is not passed sequentially through by the tail gas that nitric acid absorber absorbs during prepared by phosphatic hydroxylamine method into caprolactam technology again, gas heater, gas combustion heaters are passed through in oxides of nitrogen gas elimination reaction device, reacted under catalyst action with ammonia, form the discharge gas containing nitrogen and vapor, this process occurs without any time neutral, reduce the concentration of nitrogen oxides in discharge gas, so that nitrous oxides concentration ＜ 200mg/m in discharge gas3, discharge gas environment protection standard.
Brief description of the drawings
Fig. 1 is the structural representation of the removal of nitrogen oxide device of an implementation method.
Specific embodiment
To enable the above objects, features and advantages of the present invention more obvious understandable, specific embodiment of the invention is described in detail below in conjunction with the accompanying drawings.Elaborate many details in order to fully understand the present invention in the following description.But the present invention can be implemented with being much different from other manner described here, and those skilled in the art can do similar improvement in the case of without prejudice to intension of the present invention, therefore the present invention is not limited by following public specific implementation.
Refer to Fig. 1, the removal of nitrogen oxide device of one implementation method, the nitrogen oxides produced in caprolactam technology is prepared for removing phosphatic hydroxylamine method, the removal of nitrogen oxide device includes oxides of nitrogen gas removing filter 10, gas heater 20, gas combustion heaters 30, air line 40, hydrogen gas lines 50, oxides of nitrogen gas elimination reaction device 60 and ammonia pipeline 70.
Wherein, oxides of nitrogen gas removing filter 10 is used to prepare phosphatic hydroxylamine method the tail gas cohesion not absorbed by nitric acid absorber in caprolactam technology, removes nitric acid fog, obtains filtering gas.
Phosphatic hydroxylamine method is prepared in the technique of caprolactam, from nitric acid absorber top, out unabsorbed tail gas enters oxides of nitrogen gas removing filter 10, by condensing with the nitric acid fog except deentrainment, the liquid being agglomerated into then is discharged by the bottom of oxides of nitrogen gas removing filter 10 and reclaimed, and top of the filtering gas then from oxides of nitrogen gas removing filter 10 enters gas heater 20.
Gas heater 20 is connected with oxides of nitrogen gas removing filter 10.Gas heater 20 is used for high steam as thermal source, and filtering gas is exchanged heat with high steam, the tail gas after being heated.
In the present embodiment, gas heater 20 is tubular heat exchanger.Enter the shell side of gas heater 20 from the top of oxides of nitrogen gas removing filter 10 filtering gas out, heated from tube side with high steam, the tail gas after being heated, the tail gas after heating enters gas combustion heaters 30.
Gas combustion heaters 30 are connected with gas heater 20.Gas combustion heaters 30 are used to the tail gas after heating will be continued after hydrogen and compressed air ignition to heat, and obtain combustion tail gas.
Air line 40 is connected with gas combustion heaters 30, for providing compressed air.
Hydrogen gas lines 50 are connected with gas combustion heaters 30, for providing hydrogen.
In the present embodiment, hydrogen gas lines 50 include hydrogen exhaust pipe 52 and auxiliary hydrogen gas lines 54.
Wherein, hydrogen exhaust pipe 52 is used to provide the hydrogeneous tail-gas that phosphatic hydroxylamine method prepares azanol operation generation in caprolactam technology.Auxiliary hydrogen gas lines 54 are used for provided auxiliary hydrogen.
It is appreciated that during azanol operation is recrystallized, if extraneous raw hydrogen charging consumption adjustment is frequent, causing hydrogen dividing potential drop to be unable to stability contorting 30% ~ 35%, it is impossible to meet process control needs（The burning hydrogen usage about 80m of gas combustion heaters 303/hr）When, auxiliary hydrogen now being passed through by aiding in hydrogen gas lines 54, can be burnt with stability contorting gas combustion heaters 30.
For the fuel of stability contorting gas combustion heaters 30, air line 40 is provided with flow and indicates control valve 400, and hydrogen gas lines 50 are provided with proportion adjustment control valve 500, and gas combustion heaters 30 are provided with temperature and indicate control valve 300 near one end of outlet.Said temperature indicates control valve 300, proportion adjustment control valve 500 and flow to indicate interlocked control between control valve 400.
Oxides of nitrogen gas elimination reaction device 60 is connected with gas combustion heaters 30.Oxides of nitrogen gas elimination reaction device 60 is used to react combustion tail gas and ammonia under catalyst action, forms the discharge gas containing nitrogen and vapor, nitrous oxides concentration ＜ 200mg/m in the discharge gas3。
Ammonia pipeline 70 is connected with oxides of nitrogen gas elimination reaction device 60, for providing ammonia.
Because combustion tail gas and ammonia react under catalyst action, formation carries a large amount of heat energy in the discharge gas containing nitrogen and vapor, in order to make full use of this partial heat energy, above-mentioned removal of nitrogen oxide device also to include air compressor turbine 80.The air compressor turbine 80 is connected with oxides of nitrogen gas elimination reaction device 60, for entering air after the discharge gas acting by oil-containing nitrogen and vapor.
Above-mentioned removal of nitrogen oxide device, normally after operation, the exhaust emissions of hydrogen is stable after azanol operation recrystallization for air compressor（Reaction pressure is controlled in 2500kPa ~ 2550kPa, and hydrogen dividing potential drop is 30% ~ 35%）On the premise of, it is first 1 hour that ammoxidation nitric acid absorbs operation igniting driving（I.e. phosphatic hydroxylamine method prepares caprolactam and produces 1 hour before the tail gas not absorbed by nitric acid absorber）, hydrogen is led in the igniting of gas combustion heaters 30 and compressed air is burnt, and oxides of nitrogen gas elimination reaction device 60 is warming up to 270 DEG C ~ 280 DEG C in advance.20 minutes ~ 30 minutes after the logical ammonia reaction driving of ammoxidation operation, produce the tail gas not absorbed by absorption tower, this does not pass sequentially through oxides of nitrogen gas removing filter 10, gas heater 20, gas combustion heaters 30 and is passed through in oxides of nitrogen gas elimination reaction device 60 by the tail gas that nitric acid absorber absorbs, reacted under catalyst action with ammonia, form the discharge gas containing nitrogen and vapor, this process occurs without any time neutral, reduce the concentration of nitrogen oxides in discharge gas so that nitrous oxides concentration ＜ 200mg/m in discharge gas3, discharge gas environment protection standard.
A kind of method that nitrogen oxides is removed using above-mentioned removal of nitrogen oxide device, is comprised the following steps：
S110, offer hydrogen and compressed air.
Wherein, the hydrogen source hydrogeneous tail-gas that azanol operation is produced in phosphatic hydroxylamine method prepares caprolactam technology.
During azanol operation is recrystallized, if extraneous raw hydrogen charging consumption is frequently, hydrogen dividing potential drop is caused to be unable to stability contorting 30% ~ 35%, it is impossible to meet process control needs（The burning hydrogen usage about 80m of gas combustion heaters3/hr）When, auxiliary hydrogen of the hydrogen also in auxiliary hydrogen gas lines, the burning of stability contorting gas combustion heaters.
S120, hydrogen and compressed air are passed through gas combustion heaters ignition, oxides of nitrogen gas elimination reaction device is warming up to 270 DEG C ~ 280 DEG C in advance.
Specifically, after air compressor operation, the exhaust emissions stabilization of hydrogen after azanol operation recrystallization（In 2500kPa ~ 2550kPa, hydrogen dividing potential drop is 30% ~ 35% for reaction pressure control）On the premise of, hydrogen and compressed air are passed through gas combustion heaters ignition, oxides of nitrogen gas elimination reaction device is warming up to 270 DEG C ~ 280 DEG C in advance.
S130, offer phosphatic hydroxylamine method prepare the tail gas not absorbed by nitric acid absorber in caprolactam technology.
S140, above-mentioned tail gas is passed through oxides of nitrogen gas removing filter, by cohesion, remove nitric acid fog, obtain filter gas.
S150, above-mentioned filtering gas is passed through gas heater, with high steam as thermal source, filtering gas is exchanged heat with high steam, the tail gas after being heated.
S160, the tail gas after heating is passed through gas combustion heaters, hydrogen continues to heat with compressed air ignition to the tail gas after heating, obtains combustion tail gas.
S170, offer ammonia.
S180, ammonia and combustion tail gas are passed through the oxides of nitrogen gas elimination reaction device for being warming up to 270 DEG C ~ 280 DEG C in advance, ammonia and combustion tail gas react under catalyst action, form the discharge gas containing nitrogen and vapor, nitrous oxides concentration ＜ 200mg/m in the discharge gas3。
Wherein, catalyst is with BaSO4/TiO2It is carrier（VO）SO4Catalyst, reaction temperature is 280 DEG C ~ 300 DEG C.
Reactional equation is as follows in step S180：
6NO2+8NH3→7N2+12H2O+45
kJ/mo1
6NO+4NH3→5N2+6H2O+300
kJ/mo1
It is appreciated that combustion tail gas react with ammonia under catalyst action, formation carries a large amount of heat energy in the discharge gas containing nitrogen and vapor, and in order to make full use of this partial heat energy, the method for above-mentioned removing nitrogen oxides is further comprising the steps of：
S190, the discharge gas containing nitrogen and vapor is passed through air compressor turbine acting after enter air.
The method of above-mentioned removing nitrogen oxides, step S120 occurs to carry out for first 1 hour in step S130, i.e. phosphatic hydroxylamine method prepares caprolactam and produces 1 hour before the tail gas not absorbed by nitric acid absorber, the logical hydrogen of the igniting of gas combustion heaters 30 and compressed air burning, make oxides of nitrogen gas elimination reaction device 60 be warming up to 270 DEG C ~ 280 DEG C in advance.
20 minutes ~ 30 minutes after the logical ammonia reaction of ammoxidation operation is driven, produce the tail gas not absorbed by absorption tower, pass sequentially through after oxides of nitrogen gas removing filter, gas heater, gas combustion heaters be passed through oxides of nitrogen gas elimination reaction device, oxides of nitrogen gas elimination reaction device has reached reaction temperature, directly can just be reacted under catalyst action with ammonia, in the absence of any time neutral, reduce the concentration of nitrogen oxides in discharge gas so that nitrous oxides concentration ＜ 200mg/m in discharge gas3, discharge gas environment protection standard.
It is below specific embodiment.
Embodiment 1
Certain annual phosphatic hydroxylamine method prepares Caprolactam unit driving, performs the method that the removal of nitrogen oxide device in the application removes nitrogen oxides, and live exhaust emissions situation is shown in Table 1.
Table 1 certain annual phosphatic hydroxylamine method prepares Caprolactam unit driving tail gas nitrogen oxide concentration statistics
Comparative example 1
Certain annual phosphatic hydroxylamine method prepares Caprolactam unit driving, performs the method that traditional removal of nitrogen oxide device removes nitrogen oxides, and live exhaust emissions situation is shown in Table 2.
Table 2 certain annual phosphatic hydroxylamine method prepares Caprolactam unit driving tail gas nitrogen oxide concentration statistics
By Tables 1 and 2 as can be seen that removing nitrogen oxides using traditional removal of nitrogen oxide device, the equal ＞ 200mg/m of environmentally friendly measuring station statistics nitrous oxides concentration in 9 startup procedures3, discharge unqualified, and the method for using removal of nitrogen oxide device removing nitrogen oxides in the application, environmentally friendly measuring station statistics nitrous oxides concentration is respectively less than 200mg/m in 9 startup procedures3, discharge qualified up to standard.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but therefore can not be interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of removal of nitrogen oxide device, prepares the nitrogen oxides produced in caprolactam technology, it is characterised in that the removal of nitrogen oxide device includes for removing phosphatic hydroxylamine method：
Oxides of nitrogen gas removes filter, for phosphatic hydroxylamine method to be prepared the tail gas cohesion not absorbed by nitric acid absorber in caprolactam technology, removes nitric acid fog, obtains filtering gas；
The gas heater connected with oxides of nitrogen gas removing filter, for high steam as thermal source, the filtering gas and high steam being exchanged heat, the tail gas after being heated；
The gas combustion heaters connected with the gas heater, for will continue to heat to the tail gas after the heating after hydrogen and compressed air ignition, obtain combustion tail gas；
The air line connected with the gas combustion heaters, for providing the compressed air；
The hydrogen gas lines connected with the gas combustion heaters, for providing the hydrogen；
The oxides of nitrogen gas elimination reaction device connected with the gas combustion heaters, for the combustion tail gas and ammonia to be reacted under catalyst action, form the discharge gas containing nitrogen and vapor, nitrous oxides concentration ＜ 200mg/m in the discharge gas3；
The ammonia pipeline connected with the oxides of nitrogen gas elimination reaction device, for providing the ammonia.
2. removal of nitrogen oxide device according to claim 1, it is characterized in that, the hydrogen gas lines include hydrogen exhaust pipe and auxiliary hydrogen gas lines, the hydrogen exhaust pipe, the hydrogeneous tail-gas of azanol operation generation in caprolactam technology are prepared for providing phosphatic hydroxylamine method, the auxiliary hydrogen gas lines, for provided auxiliary hydrogen.
3. removal of nitrogen oxide device according to claim 1, it is characterized in that, the air line is provided with flow and indicates control valve, the hydrogen gas lines are provided with proportion adjustment control valve, the gas combustion heaters are provided with temperature and indicate control valve near one end of outlet, and the temperature indicates control valve, proportion adjustment control valve and flow to indicate interlocked control between control valve.
4. removal of nitrogen oxide device according to claim 1, it is characterized in that, the removal of nitrogen oxide device also includes the air compressor turbine connected with the oxides of nitrogen gas elimination reaction device, for will enter air after the discharge gas acting containing nitrogen and vapor.
5. the method that the removal of nitrogen oxide device described in a kind of utilization claim 1 removes nitrogen oxides, it is characterised in that comprise the following steps：
Hydrogen and compressed air are provided；
The hydrogen and compressed air are passed through the gas combustion heaters ignition, the oxides of nitrogen gas elimination reaction device is warming up to 270 DEG C ~ 280 DEG C in advance；
Phosphatic hydroxylamine method is provided and prepares the tail gas not absorbed by nitric acid absorber in caprolactam technology；
The tail gas is passed through the oxides of nitrogen gas removing filter, by cohesion, nitric acid fog is removed, obtains filtering gas；
The filtering gas is passed through the gas heater, with high steam as thermal source, the filtering gas and high steam is exchanged heat, the tail gas after being heated；
Tail gas after the heating is passed through the gas combustion heaters, the hydrogen continues to heat with compressed air ignition to the tail gas after the heating, obtains combustion tail gas；
Ammonia is provided；
The ammonia and combustion tail gas are passed through the oxides of nitrogen gas elimination reaction device for being warming up to 270 DEG C ~ 280 DEG C in advance, the ammonia and combustion tail gas react under catalyst action, form the discharge gas containing nitrogen and vapor, nitrous oxides concentration ＜ 200mg/m in the discharge gas3。
6. it is according to claim 5 removing nitrogen oxides method, it is characterized in that, the ammonia and combustion tail gas are passed through the oxides of nitrogen gas elimination reaction device for being warming up to 270 DEG C ~ 280 DEG C in advance, the ammonia and combustion tail gas react under catalyst action, form the discharge gas containing nitrogen and vapor, nitrous oxides concentration ＜ 200mg/m in the discharge gas3The step of after, it is further comprising the steps of：
Air is entered after the discharge gas containing nitrogen and vapor is passed through into the acting of air compressor turbine.
7. the method for removing nitrogen oxides according to claim 5, it is characterised in that in the step of the offer hydrogen and compressed air, the hydrogen source hydrogeneous tail-gas that azanol operation is produced in phosphatic hydroxylamine method prepares caprolactam technology.
8. the method for removing nitrogen oxides according to claim 7, it is characterised in that in the step of the offer hydrogen and compressed air, the hydrogen is also from auxiliary hydrogen.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111032195A (en) * | 2017-08-15 | 2020-04-17 | 康明斯排放处理公司 | Ammonia production from engine exhaust at ambient conditions using water gas shift catalyst and ammonia synthesis catalyst |
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| CN101439260A (en) * | 2008-12-04 | 2009-05-27 | 浙江大学 | System for removing nitrous oxides in low-temperature flue gas and technique thereof |
| CN102210969A (en) * | 2010-04-07 | 2011-10-12 | 太阳筑炉工业株式会社 | System used in cinerator for reducing NOx |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101439260A (en) * | 2008-12-04 | 2009-05-27 | 浙江大学 | System for removing nitrous oxides in low-temperature flue gas and technique thereof |
| CN102210969A (en) * | 2010-04-07 | 2011-10-12 | 太阳筑炉工业株式会社 | System used in cinerator for reducing NOx |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111032195A (en) * | 2017-08-15 | 2020-04-17 | 康明斯排放处理公司 | Ammonia production from engine exhaust at ambient conditions using water gas shift catalyst and ammonia synthesis catalyst |
| CN111032195B (en) * | 2017-08-15 | 2022-03-04 | 康明斯排放处理公司 | Method for treating exhaust gas in an aftertreatment system and exhaust aftertreatment system |
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Application publication date: 20170623 |