CN105498535A - Method and device for removing nitrogen oxide in waste gas of marine diesel engine by use of sodium chlorite seawater solution - Google Patents
Method and device for removing nitrogen oxide in waste gas of marine diesel engine by use of sodium chlorite seawater solution Download PDFInfo
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- CN105498535A CN105498535A CN201510864357.9A CN201510864357A CN105498535A CN 105498535 A CN105498535 A CN 105498535A CN 201510864357 A CN201510864357 A CN 201510864357A CN 105498535 A CN105498535 A CN 105498535A
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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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
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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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
- B01D2259/124—Liquid reactants
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- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a method for removing nitrogen oxide in waste gas of a marine diesel engine by use of a sodium chlorite seawater solution. The method comprises steps as follows: 1, desulfuration and dust removal treatment; 2, denitration treatment; 3, waste liquid treatment: a waste liquid obtained after desulfuration and dust removal treatment is subjected to solid-liquid separation treatment, the obtained waste liquid and the waste liquid obtained after the denitration treatment are mixed for a reaction, the pH value of the mixed liquid is larger than 6.5, and the mixed liquid is discharged into the sea when the content of NO3<2-> meets the discharge requirements. The invention further discloses a device for removing nitrogen oxide in the waste gas of the marine diesel engine by use of the sodium chlorite seawater solution. The device comprises a sodium chlorite solution water tank, a denitration spraying tower, a desulfuration spraying tower, a separation device, a mixed water tank and a seawater inlet pipe. The denitration effect achieved by use of the sodium chlorite seawater solution is better and can meet the related discharge requirements, the waste liquid after the denitration treatment doesn't pollute the seawater, the equipment cost and the chemical cost are reduced, besides, flexible arrangement of equipment is facilitated, and the operation is convenient.
Description
Technical field
The present invention relates to Air Pollution Control and ship tail gas emission control field, particularly relate to a kind of use sodium chlorite sea water solution to remove boat diesel engine nitrogen oxides of exhaust gas method and device.
Background technology
Along with the development of international trade, the economy of Shipping is obvious all the more, causes increasing goods to select to adopt Shipping.But numerous boats and ships use poor quality fuel oil as fuel, and boat diesel engine waste gas is more and more serious for the pollution of environment.The data provided to International Maritime Organization according to Norway shows, the particulate pollutant total amount of annual global marine ships discharge is equivalent to the half of Global Auto institute pm emission pollutant, the nitrogen oxide total amount of boats and ships discharge accounts for 30% of Global emissions nitrogen oxide total amount, and the sulphur oxide gas total amount of boats and ships discharge accounts for 4% of world's total emission volumn.Marine exhaust can not be ignored the pollution that air causes, particularly in port city and region, intensive navigation channel.International community more and more pays close attention to the problem of environmental pollution that boats and ships cause.
IMO MEPC the 40th session have passed MARPOL73/781997 protocol (comprise supplemental provisions VI-prevent boats and ships from causing atmosphere pollution rule) and 8 draft resolutions in September, 1997.China's " discharge standard of air pollutants " also came into effect in 1997.In October, 2008 MEPC the 58th session have passed the protocol annex amendments in 1997 (revised MAPOL73/78 supplemental provisions VI) of MEPC.176 (58) number resolution-revision " the < MARPOL > in 1973 through protocol revision in 1978 ", this amendment was considered as being accepted on January 1st, 2010, gives tacit consent to come into force on July 1st, 2010.For the requirement of nitrogen oxide, except emergency set, on on January 1st, 2000 or the later boats and ships built, each power output is more than the marine diesel of 130kW, the discharge capacity of nitrogen oxide should in following limits value: (1) the Ith grade, on January 1st, 2000 or the boats and ships later built to 1 day January in 2011: 1. 17.0g/ (kWh), as n < 130r/min; 2. 45.0 × n
(-0.2)g/ (kWh), as 130r/min≤n < 2000r/min; 3. 9.8g/ (kWh), as n>=2000r/min.Wherein n is diesel engine rated speed.(2) the IIth grades, on January 1st, 2011 or the boats and ships later built: 1. 14.4g/ (kWh), as n < 130r/min; 2. 44.0 × n
(-0.2)g/ (kWh), as 130r/min≤n < 2000r/min; 3. 7.7g/ (kWh), as n>=2000r/min.(3) the IIIth grades, on January 1st, 2016 or the boats and ships later built: 1. 3.4g/ (kWh), as n < 130r/min; 2. 9.0 × n
(-0.2)g/ (kWh), as 130r/min≤n < 2000r/min; 3. 2.0g/ (kWh), as n>=2000r/min.For the requirement of oxysulfide, any fuel oil that ship uses, its sulfur content must not exceed following restriction: before on January 1st, (1) 2012,4.5%m/m; On January 1st, (2) 2012 and after, 3.5%m/m; (3) the year two thousand twenty January 1 and after, 0.5%m/m.When boats and ships are operated in sulphur emissions control area (SECA), on ship, the sulfur content of fuel oil used must not exceed following restriction: before on July 1st, (1) 2012,1.5%m/m; On July 1st, (2) 2012 and after, 1.0%m/m; On January 1st, (3) 2015 and after, 0.1%m/m.Emission control district comprises other region that region, Baltic Sea, region, the North Sea and MEPC delimit, and comprises port area.For the requirement that marine exhaust discharge is more and more stricter, new solution is all being sought by national governments and shipping company.
In recent years, domestic and international Ge great shipborne equipment company and scientific research institutions all increase the investment to marine exhaust denitration and desulfur technology.Emerge many patents about exhaust gas denitration technology, as in patent " a kind of method of denitrating flue gas and device " (patent No. CN104258701A), use oxidant that NO is oxidized to NO
2, re-use alkaline absorbent and water absorption NO
2, complete denitrification process.Use the method for oxidant and absorbent can increase equipment initial outlay expense respectively, drug expenditure also can increase thereupon, and economy reduces, and adopts two cover reaction units to increase occupation area of equipment, is unfavorable for flexible arrangement.In patent " a kind of seawater that utilizes carries out the devices and methods therefor of desulfurization and dedusting to ship exhaust fume " (patent No. CN102274682A), direct discharge into sea after solution after desulfurization and sea water mixing, the pH value of solution is difficult to meet the emission request being greater than 6.5.Meanwhile, containing a large amount of SO in the solution after desulfurization
3 2-, directly enter in seawater and again can be decomposed into SO
2, cause secondary pollution.
Summary of the invention
According to the technical problem of above-mentioned proposition, and provide a kind of use sodium chlorite sea water solution to remove boat diesel engine nitrogen oxides of exhaust gas method and device.
The technological means that the present invention adopts is as follows:
Use sodium chlorite sea water solution to remove a method for boat diesel engine nitrogen oxides of exhaust gas, there are following steps:
S1, desulfurization and dedusting process: seawater is pumped in desulfuration spray tower, and desulfurization and dedusting process is carried out to the waste gas from diesel engine;
S2, denitration process: the sodium chlorite aqueous solution and the sea water mixing that by Solute mass fraction are 10%-40%, obtain sodium chlorite sea water solution, afterwards, by the waste gas hybrid reaction obtained after the sodium chlorite sea water solution obtained and desulfurization and dedusting process, NO in the waste gas obtained
xcontent is discharged lower than time 2.0g/ (kWh);
S3, liquid waste processing: the waste liquid obtained after desulfurization and dedusting process is through Separation of Solid and Liquid process, and the impurity such as particle are separated, the waste liquid hybrid reaction obtained after the waste liquid obtained and denitration process, SO
3 2-be oxidized to SO
4 2-, improve pH value, the pH value of the mixing material obtained is greater than 6.5 and NO simultaneously
3 2-content when meeting emission request, directly enter marine.
NO in the waste gas obtained after denitration process
xcontent is monitored by gas controlling device, addition when being sodium chlorite aqueous solution and the sea water mixing of 10%-40% according to monitoring result control Solute mass fraction, and whether the waste gas obtained after controlling denitration process discharges.
The pH value of mixing material and NO in described step S3
3 2-content by liquid monitoring device monitoring, the mixing ratio of the waste liquid obtained after the waste liquid obtained after controlling Separation of Solid and Liquid process according to monitoring result and denitration process, and control described mixing material and whether directly enter marine.
The NO of emission request is met in described step S3
3 2-content for being less than 60mg/L.
The invention also discloses a kind of device using sodium chlorite sea water solution to remove boat diesel engine nitrogen oxides of exhaust gas, comprise sodium chlorite solution's water tank, denitration spray column, desulfuration spray tower, separator, mixing water tank, sludge tank, seawater water inlet pipe and seawater drainpipe
Described seawater water inlet pipe is communicated with the spray equipment of sea water pump I with described denitration spray column by filter successively,
Described seawater water inlet pipe is communicated with the spray equipment of sea water pump II with described desulfuration spray tower by described filter successively,
Be provided with dosing pump between described sea water pump I and described denitration spray column, described dosing pump is communicated with described sodium chlorite solution's water tank,
The top of described denitration spray column is provided with waste gas outlet, described waste gas outlet is provided with gas controlling device, the bottom of described denitration spray column is communicated with described mixing water tank, the sidewall bottom of described denitration spray column is communicated with the top of described desulfuration spray tower, the sidewall bottom of described desulfuration spray tower is provided with exhaust gas inlet, the bottom of described desulfuration spray tower is communicated with described separator, described separator is communicated with described sludge tank with described mixing water tank respectively, agitating device and liquid monitoring device is provided with in described mixing water tank, described mixing water tank is communicated with described seawater drainpipe by sea water pump III.
Described sea water pump I, described sea water pump II and described sea water pump III are centrifugal pump.
Described dosing pump is liquid feeding measuring pump.
The spray equipment of described denitration spray column has one or more levels spraying layer; The spray equipment of described desulfuration spray tower has one or more levels spraying layer.
Described separator is hydrocyclone.
Described a kind of operation principle using sodium chlorite sea water solution to remove the device of boat diesel engine nitrogen oxides of exhaust gas enters in described desulfuration spray tower by described filter and described sea water pump II for seawater, and with the waste gas hybrid reaction from diesel engine, the waste gas obtained enters in described denitration spray column, the waste liquid obtained enters described separator
Sodium chlorite solution in described sodium chlorite solution's water tank is by described dosing pump and the sea water mixing pumped into by described filter and described sea water pump I, and enter in described denitration spray column and the waste gas hybrid reaction entered in described denitration spray column, NO in the waste gas obtained
xcontent is monitored by gas controlling device, and according to addition when monitoring result control sodium chlorite aqueous solution and sea water mixing, and whether the waste gas controlling to obtain discharges, and the waste liquid obtained enters into described mixing water tank.
Waste liquid in described separator is through Separation of Solid and Liquid process, the impurity such as the particle obtained enter described sludge tank, the waste liquid obtained enters in described mixing water tank, and with in described denitration spray column, enter the described waste liquid mixed in water tank mixed by described agitating device, the pH value of the mixing material obtained and NO
3 2-content by liquid monitoring device monitoring, according to the waste liquid obtained and the mixing ratio entering the described waste liquid mixed in water tank in described denitration spray column after the process of monitoring result control Separation of Solid and Liquid, and control described sea water pump III, thus control described mixing material and whether directly enter marine.
The present invention has the following advantages:
1) utilize sodium chlorite sea water solution denitration effect better, can meet associated emission requirement, and boats and ships obtain seawater comparatively easily, the waste liquid after denitration process does not pollute seawater;
2) oxidation of NO and NO
xabsorption all come by sodium chlorite seawer washing liquid, be conducive to reducing cost of equipment and drug expenditure, be convenient to the flexible arrangement of equipment simultaneously;
3) waste liquid obtained after desulfurization and dedusting process is through Separation of Solid and Liquid process, and the waste liquid hybrid reaction obtained after the waste liquid obtained and denitration process, can utilize unspent sodium chlorite to be oxidized SO in mixed solution
3 2-, replace aeration process, prevent the SO after discharging
3 2-effusion SO
2and cause secondary pollution, the pH value of the waste liquid obtained after simultaneously contributing to improving Separation of Solid and Liquid process, simplify experimental provision and process, realize simultaneous SO_2 and NO removal efficiently;
4) addition when can be sodium chlorite aqueous solution and the sea water mixing of 10%-40% according to the monitoring result control Solute mass fraction of gas controlling device, and whether the waste gas obtained after controlling denitration process discharges;
The mixing ratio of the waste liquid obtained after the waste liquid obtained after can controlling Separation of Solid and Liquid process according to the monitoring result of liquid monitoring device and denitration process, and control described mixing material and whether directly enter marine;
5) use spray mode, have reaction speed fast, gas-liquid contact face is large, is conducive to NO
xand SO
2absorption and reaction, simultaneously velocity of flue gas is high, and resistance is little, and the sectional area of spray scrubber is little, it is little to take up room;
6) equipment of the method is simple, easy to operate, can be widely used.
The present invention extensively can promote in fields such as Air Pollution Control and ship tail gas emission controls for the foregoing reasons.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is a kind of structural representation using sodium chlorite sea water solution to remove the device of boat diesel engine nitrogen oxides of exhaust gas in the specific embodiment of the present invention.
Wherein, the direction of arrow in Fig. 1 is media flow direction.
Detailed description of the invention
Embodiment 1
Use sodium chlorite sea water solution to remove a method for boat diesel engine nitrogen oxides of exhaust gas, there are following steps:
S1, desulfurization and dedusting process: seawater is pumped in desulfuration spray tower, and desulfurization and dedusting process is carried out to the waste gas from diesel engine;
S2, denitration process: the sodium chlorite aqueous solution and the sea water mixing that by Solute mass fraction are 10%-40%, obtain sodium chlorite sea water solution, afterwards, by the waste gas hybrid reaction obtained after the sodium chlorite sea water solution obtained and desulfurization and dedusting process, NO in the waste gas obtained
xcontent is discharged lower than time 2.0g/ (kWh);
S3, liquid waste processing: the waste liquid obtained after desulfurization and dedusting process is through Separation of Solid and Liquid process, and the waste liquid hybrid reaction obtained after the waste liquid obtained and denitration process, the pH value of the mixing material obtained is greater than 6.5 and NO
3 2-content when meeting emission request, directly enter marine.
NO in the waste gas obtained after denitration process
xcontent is monitored by gas controlling device, addition when being sodium chlorite aqueous solution and the sea water mixing of 10%-40% according to monitoring result control Solute mass fraction, and whether the waste gas obtained after controlling denitration process discharges.
The pH value of mixing material and NO in described step S3
3 2-content by liquid monitoring device monitoring, the mixing ratio of the waste liquid obtained after the waste liquid obtained after controlling Separation of Solid and Liquid process according to monitoring result and denitration process, and control described mixing material and whether directly enter marine.
The NO of emission request is met in described step S3
3 2-content for being less than 60mg/L.
Embodiment 2
As shown in Figure 1, a kind of device using sodium chlorite sea water solution to remove boat diesel engine nitrogen oxides of exhaust gas, comprise sodium chlorite solution's water tank 1, denitration spray column 2, desulfuration spray tower 3, hydrocyclone 4, mixing water tank 5, sludge tank 6, seawater water inlet pipe 7 and seawater drainpipe 8, described seawater water inlet pipe 7 is communicated with the spray equipment of sea water pump I 10 with described denitration spray column 2 by filter 9 successively, described seawater water inlet pipe 7 is communicated with the spray equipment of sea water pump II 11 with described desulfuration spray tower 3 by described filter 9 successively, liquid feeding measuring pump 12 is provided with between described sea water pump I 10 and described denitration spray column 2, described liquid feeding measuring pump 12 is communicated with described sodium chlorite solution's water tank 1, the top of described denitration spray column 2 is provided with waste gas outlet 13, described waste gas outlet 13 is provided with gas controlling device 14, the bottom of described denitration spray column 2 is communicated with described mixing water tank 5, the sidewall bottom of described denitration spray column 2 is communicated with the top of described desulfuration spray tower 3, the sidewall bottom of described desulfuration spray tower 3 is provided with exhaust gas inlet 15, the bottom of described desulfuration spray tower 3 is communicated with described hydrocyclone 4, described hydrocyclone 4 is communicated with described sludge tank 6 with described mixing water tank 5 respectively, agitating device 16 and liquid monitoring device 17 is provided with in described mixing water tank 5, described mixing water tank 5 is communicated with described seawater drainpipe 8 by sea water pump III 18.
Described sea water pump I 10, described sea water pump II 11 and described sea water pump III 18 are centrifugal pump.
The spray equipment of described denitration spray column 2 has secondary spraying layer; The spray equipment of described desulfuration spray tower 3 has secondary spraying layer.
The above; be only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (9)
1. use sodium chlorite sea water solution to remove a method for boat diesel engine nitrogen oxides of exhaust gas, it is characterized in that there are following steps:
S1, desulfurization and dedusting process: seawater is pumped in desulfuration spray tower, and desulfurization and dedusting process is carried out to the waste gas from diesel engine;
S2, denitration process: the sodium chlorite aqueous solution and the sea water mixing that by Solute mass fraction are 10%-40%, obtain sodium chlorite sea water solution, afterwards, by the waste gas hybrid reaction obtained after the sodium chlorite sea water solution obtained and desulfurization and dedusting process, NO in the waste gas obtained
xcontent is discharged lower than time 2.0g/ (kWh);
S3, liquid waste processing: the waste liquid obtained after desulfurization and dedusting process is through Separation of Solid and Liquid process, and the waste liquid hybrid reaction obtained after the waste liquid obtained and denitration process, the pH value of the mixing material obtained is greater than 6.5 and NO
3 2-content when meeting emission request, directly enter marine.
2. method according to claim 1, is characterized in that: NO in the waste gas obtained after denitration process
xcontent is monitored by gas controlling device, addition when being sodium chlorite aqueous solution and the sea water mixing of 10%-40% according to monitoring result control Solute mass fraction, and whether the waste gas obtained after controlling denitration process discharges.
3. method according to claim 1, is characterized in that: the pH value of mixing material and NO in described step S3
3 2-content monitored by gas controlling device, the mixing ratio of the waste liquid obtained after the waste liquid obtained after controlling Separation of Solid and Liquid process according to monitoring result and denitration process, and control described mixing material and whether directly enter marine.
4. method according to claim 1, is characterized in that: the NO meeting emission request in described step S3
3 2-content for being less than 60mg/L.
5. the device using sodium chlorite sea water solution to remove boat diesel engine nitrogen oxides of exhaust gas, it is characterized in that: comprise sodium chlorite solution's water tank, denitration spray column, desulfuration spray tower, separator, mixing water tank, sludge tank, seawater water inlet pipe and seawater drainpipe
Described seawater water inlet pipe is communicated with the spray equipment of sea water pump I with described denitration spray column by filter successively,
Described seawater water inlet pipe is communicated with the spray equipment of sea water pump II with described desulfuration spray tower by described filter successively,
Be provided with dosing pump between described sea water pump I and described denitration spray column, described dosing pump is communicated with described sodium chlorite solution's water tank,
The top of described denitration spray column is provided with waste gas outlet, described waste gas outlet is provided with gas controlling device, the bottom of described denitration spray column is communicated with described mixing water tank, the sidewall bottom of described denitration spray column is communicated with the top of described desulfuration spray tower, the sidewall bottom of described desulfuration spray tower is provided with exhaust gas inlet, the bottom of described desulfuration spray tower is communicated with described separator, described separator is communicated with described sludge tank with described mixing water tank respectively, agitating device and liquid monitoring device is provided with in described mixing water tank, described mixing water tank is communicated with described seawater drainpipe by sea water pump III.
6. device according to claim 5, is characterized in that: described sea water pump I, described sea water pump II and described sea water pump III are centrifugal pump.
7. device according to claim 5, is characterized in that: described dosing pump is liquid feeding measuring pump.
8. device according to claim 5, is characterized in that: the spray equipment of described denitration spray column has one or more levels spraying layer; The spray equipment of described desulfuration spray tower has one or more levels spraying layer.
9. device according to claim 5, is characterized in that: described separator is hydrocyclone.
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Cited By (8)
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| CN106178891A (en) * | 2016-08-11 | 2016-12-07 | 大连海事大学 | A kind of flue gas wet denitration method and device |
| CN106178886A (en) * | 2016-07-13 | 2016-12-07 | 大连海事大学 | Waste gas total system based on wet scrubbing |
| CN106345250A (en) * | 2016-08-29 | 2017-01-25 | 中石化炼化工程（集团）股份有限公司 | Ultralow emission process for catalytic cracking smoke |
| CN106984161A (en) * | 2017-06-07 | 2017-07-28 | 大连海事大学 | A kind of marine exhaust pollutant and ballast water integrated conduct method and device |
| CN107875855A (en) * | 2017-11-14 | 2018-04-06 | 大连海事大学 | A kind of boat diesel engine exhaust emission integrated conduct method and device |
| EP3398673A1 (en) * | 2017-02-07 | 2018-11-07 | Instytut Chemii i Techniki Jadrowej | A method of reducing high concentrations of nitrogen oxides in the exhaust gases from diesel engines using electron beam radiation and wet scrubbing |
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| CN114517723A (en) * | 2022-03-03 | 2022-05-20 | 威海市正大环保设备股份有限公司 | Marine desulfurization, denitrification and dedusting integrated device and method |
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