CN105854601A - Integrated device for conducting desulfurization and denitrification on marine diesel engine tail gas - Google Patents
Integrated device for conducting desulfurization and denitrification on marine diesel engine tail gas Download PDFInfo
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- CN105854601A CN105854601A CN201610293190.XA CN201610293190A CN105854601A CN 105854601 A CN105854601 A CN 105854601A CN 201610293190 A CN201610293190 A CN 201610293190A CN 105854601 A CN105854601 A CN 105854601A
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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
- 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
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
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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
- B01D2259/122—Gaseous reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4566—Gas separation or purification devices adapted for specific applications for use in transportation means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/818—Employing electrical discharges or the generation of a plasma
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- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
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- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention aims at providing an integrated device for conducting desulfurization and denitrification on marine diesel engine tail gas. The device comprises a plasma generator, a power supplying device, a high voltage electricity generator, a dry type dust collector, granulation equipment and ammonia supplying equipment, the plasma generator is provided with a tail gas inlet, a tail gas outlet and an ammonia inlet, an exhaust pipe of a marine diesel engine is connected with the tail gas inlet, the tail gas outlet is connected with the dry type dust collector, the dry type dust collector is connected with the granulation equipment and the atmosphere, the power supplying device is connected with the high voltage electricity generator, and the high voltage electricity generator is connected with the plasma generator. By means of the desulfurization and denitrification integrated device, the occupied land area is reduced, efficiency of a discharging power source is improved, the plasma generation area is increased, the acting time of tail gas and plasmas is prolonged, treatment efficiency is improved, and meanwhile the flow velocity and temperature of the tail gas are also controlled to a certain extent.
Description
Technical field
The present invention relates to the exhaust gas processing device of a kind of boat diesel engine, specifically boat diesel engine.
Background technology
The fuel oil of heavy is the popular fuel of marine diesel, and in its tail gas, main pernicious gas composition is NOx
(predominantly NO) and SOx (predominantly SO2), easily cause acid rain and photochemical fog, be detrimental to health
And environment.To this end, International Maritime Organization has formulated a series of anti-pollution convention, it is harmful in ship tail gas
Discharge is divided strictly to limit.Meanwhile, various countries are also in active development ship tail gas processing means, in tail gas
NOx and SOx process.
Current ship tail gas single treatment method existence is as big in initial investment, floor space is big, system administration is multiple
Miscellaneous, the problem such as equipment is perishable, catalyst leakage and marine site Effects of Salinity.Therefore, exploitation is applicable to ship
Vessel exhaust desulfurization and denitrification integral technology becomes the focus of Recent study.At existing desulfurization and denitrification integral
In method, plasma technique is a kind of tail gas clean-up technology with researching value.
Patent " the method for plasma integration desulfurization denitration dedusting in Application No. 201310472661.X
And device " in propose a kind of can the integral treatment method of simultaneous SO_2 and NO removal dedusting.The method utilizes
Plasma method carries out oxidation processes to NO and SO2 in boiler smoke, generates HNO3 and H2SO4, with
After be passed through ammonia generate recyclable ammonium salt.Wherein plasma generator internal electrode uses netted chi structure,
Owing to the exhaust gas component of marine diesel is complicated, the also material such as NOx, SOx and greasy dirt, this structure for
For the marine diesel oil tail gas of complicated component, treatment effect is the best, can shorten electrode life.Deng from
It is little that daughter produces space, and density is relatively low, is not sufficiently stable.Meanwhile, the plasma generator of through type
Being not suitable for processing flow velocity tail gas faster, tail gas so can be made to reduce with the action of plasma time, effect is not
Fully.Additionally, the plasma produced in this structure is affected by othermohygrometer, it is unsuitable for the complexity of boats and ships
Operating mode.
Application No. 201020551859.9 patent " a kind of marine vessel exhaust integration desulfurization denitration
Device " and the patent of Application No. 201010299518.1 " a kind of for marine vessel exhaust integrated desulfurization
The method of denitration " the middle one that proposes is by plasma generator, and seawer washing tower is that the desulfurization of key facility takes off
Nitre integral method and device.The method added tail gas before tail gas enters low-temperature plasma generator
Heat sink, adds energy consumption, makes equipment investment increase.Should prevent according to IMO regulation washings processing system
Only the discharge of nitrate exceedes in scavenging the nitrate amount corresponding to 12%NOx or 60mg/L, and discharge is washed
Wash the pH value of water not less than 6.5.The method utilizes seawer washing tower to remove the nitric acid and sulfuric acid generated, and is formed
Nitrate and the in line sea of sulfate pollute, containing the nitric acid thoroughly do not removed in the cleaning solution of eliminating
Solution is made to be that acidity pollutes too with sulfuric acid.Additionally, seawer washing absorbs the discharge of NOx and SOx
By temperature limiting, being difficult in adapt to for the complex working condition in ship running, treatment effect is limited.
In sum, the method for current existing process ship tail gas also exists various deficiency,
Develop a kind of economical and effective and be suitable for the method simultaneously processing the harmful substances such as NOx and SOx under any operating mode
And device, it is the important research direction of ship tail gas Treatment process.
Summary of the invention
It is an object of the invention to provide can process simultaneously NOx and SOx a kind of marine diesel tail gas take off
Sulphur denitrification integrated device.
The object of the present invention is achieved like this:
One boat diesel engine tail gas desulfurization denitrification integrated device of the present invention, is characterized in that: include plasma
Body generator, electric supply installation, high-tension electricity maker, dry dust collector, Granulation Equipments, ammonia supply equipment, etc.
Gas inlet, offgas outlet and ammonia entrance, the blast pipe of boat diesel engine are set on plasma generator
Connecting gas inlet, offgas outlet connects dry dust collector, and dry dust collector connects Granulation Equipments respectively with big
Gas, electric supply installation connects high-tension electricity maker, and high-tension electricity maker connects plasma generator.
The present invention can also include
1, described plasma generator includes external electrode, dielectric layer, internal high pressure electrode, described Jie
Matter layer is the U-shaped tubular structure of hollow, and internal high pressure electrode is arranged on inside dielectric layer, internal high pressure electrode
Being fixed by stabilization ring with dielectric layer, external electrode is wrapped on dielectric layer outer wall, and gas inlet is arranged on Jie
One end of matter layer, offgas outlet is arranged on another end of dielectric layer, and ammonia entrance is arranged on medium
The turning of the U-shaped tubular structure of layer, external electrode and internal high pressure electrode connect high-tension electricity maker respectively.
2, described plasma generator is that coaxial clyinder tubular structure, i.e. external electrode and inside are high
Piezoelectricity pole is the U-shape structure consistent with dielectric layer shape, and the two is coaxial with dielectric layer.
Present invention have an advantage that
1, the present invention uses the device of a kind of plasma tail gas desulfurization denitrification integral to marine diesel tail gas
Directly process.Produce large area plasma by dielectric barrier discharge technology SO2 and NO is entered simultaneously
Row processes.Institute of the present invention using plasma generation technique have be suitable to chemical reaction, discharge process be prone to control
System, capacity usage ratio are high, can be applied to ship tail gas under atmospheric low-temperature environment and other complex working conditions processes
Etc. advantage and good for simultaneous SO_2 and NO removal treatment effect.
2, plasma generator indoor design used in the present invention is different from traditional design, utilizes shell and tube to join
Logical arrangement mode, this patent the most two is classified as example and is introduced.It is raw that this layout type improves plasma
Becoming area and generate quantity, making the time lengthening of NO and SO2 in action of plasma flue gas, active area adds
Greatly, control tail gas flow velocity simultaneously.
3, the present invention is at tail gas after plasma treatment, is passed through ammonia, and end product is ammonium salt,
Can serve as chemical fertilizer, it is to avoid secondary pollution, the added value of product ammonia fertilizer is high, has an obvious economic benefit,
Consumed energy needed for consumed energy is less than other equipment such as seawer washing equipment needed for ammonia supply equipment, meets IMO
Middle regulation.
4, while the present invention can remove NOx and SOx in ship tail gas at the same time, to consolidating in tail gas
Body particle (such as PM) also has certain treatment effect.
5, the present invention is without adding the equipment such as tail gas cooling, humidification, therefore invest little, floor space is little.Oxygen
The features such as nitric acid and sulfuric acid treatment after change are effective, technological process is simple, save boats and ships space.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 a is the plasma generator structure schematic diagram of the present invention, and Fig. 2 b is the sectional view of Fig. 2 a.
Detailed description of the invention
Illustrate below in conjunction with the accompanying drawings and the present invention be described in more detail:
In conjunction with Fig. 1～2, the present invention utilizes ship power supply device to provide the electric energy for producing plasma, changes
Become the layout type of original plasma generator, use coaxial clyinder shell and tube dielectric barrier discharge etc. from
Daughter generator generates plasma.Dielectric barrier discharge just can produce large space under normal pressure and lower temperature
Highdensity plasma, it is adaptable to the complex working conditions such as ship's navigation.Plasma the most of the present invention occurs
Device internal electrode uses shell and tube arrangement mode, increases machining area and plasma generating space, increases
Active group quantity, extends and tail gas action time, makes NO and SO2 oxidation in tail gas abundant.Lead to subsequently
Enter ammonia, react the available ammonium salt of generation with HNO3 and H2SO4 generated, it is to avoid produce vent gas treatment refuse,
Cause secondary pollution, reach to remove the purpose of NOx and SOx in marine diesel tail gas simultaneously.
The present invention provides the technical scheme of NOx and SOx in removal ship tail gas as follows:
(1) tail gas produced by boat diesel engine passes through plasma generator so that produces in tail gas and includes
High energy electron, charged ion, neutral particle and the plasma of free radical isoreactivity particle.
The layout type of plasma generator is the arrangement of coaxial clyinder shell and tube, and this patent two is classified as example,
Plasma generator structure includes high-field electrode, dielectric layer and the outer electrode of centre, overall outer layer
Coated insulation dielectric layer.Electric supply installation provides AC power, produces high-tension electricity after high-voltage generator transformation.
Plasma generator high-field electrode, extraneous electrode are connected with high-voltage generator and constitute complete plasma and tie
Structure.
(2) O2, H2O molecular action in plasma and tail gas, generate have the H of strong oxidizing property, O,
OH, O3 active particle, there is oxidation reaction in SO2 and NO2 in tail gas under the effect of active particle, raw
Become HNO3 and H2SO4 of high price.
(3) being passed through ammonia to plasma generator, ammonia reacts with high price HNO3 and H2SO4 in flue gas
Generate charged ammonium salt particle.
(4) charged ammonium salt particle is collected by dry dust collector, and the tail gas after purification is discharged by pipeline.
(5) the ammonium salt particle adsorbed forms ammonium salt reclamation by Granulation Equipments and utilizes.
(1) the applying voltage in makes supply voltage raise after being processed by high-voltage generator by electric supply installation,
Meet and produce isoionic voltage requirements.
(3) in, the intake of ammonia is: Q1=(2C1 η 1+C2 η 2) Q2 wherein Q1 and Q2 is respectively
NH3 and the intake of flue gas, η 1 and η 2 is respectively SO2 removal efficiency and NO removal efficiency, C1 and C2
Represent the volumetric concentration of SO2 and NO in flue gas respectively.
The chemical reaction process of the present invention is as follows:
1, flue gas desulfurization course
OH+SO2→HSO3
OH+HSO3→H2SO4
O+SO2→SO3
SO3+H2O→H2SO4
2, denitrating flue gas process
OH+NO→HNO2
O+HNO2→HNO3
O+NO→NO2
OH+NO2→HNO3
3, accessory substance ammonium salt generates
NH3+HNO3→NH4NO3
NH3+H2SO4→(NH4)2SO4
In main pernicious gas composition in marine diesel tail gas, NO and SO2 accounts for main body, so master of the present invention
SO2 and NO in flue gas to be processed.
Fig. 1 is the ship tail gas plasma desulfuration denitrification integral schematic diagram of the present invention.Ship Power Equipment
I.e. boat diesel engine 1 produces waste gas and is entered in plasma generator 4 by gas inlet 9 via pipeline.
Electric supply installation 2 produces the electric energy required for plasma generator.Alternating voltage is through high-tension electricity maker 3
Produce high voltage and current, act on the high-field electrode 8 within plasma generator 4 and external electrode 11,
Low temperature plasma is generated in region of discharge 16.
After low temperature plasma generates in region of discharge 16, give off O2, H2O in tail gas with diesel engine 1
Molecular action, generates H, O, OH, O3 isoreactivity particle with strong oxidizing property, NO and SO2 in tail gas
HNO3 and H2SO4 is generated with the reaction of these active particles.By ammonia supply equipment 5 to plasma generator
Internal input ammonia, ammonia is entered in plasma generator 4 by entrance 10, in region of discharge 16 with
HNO3 and H2SO4 generates NH4NO3 and (NH4) 2SO4.Subsequently, reaction product matter is by offgas outlet 14
It is discharged in dry dust collector 6.Two kinds of ammonium salts are absorbed into Granulation Equipments 7 life via dry dust collector 6
Becoming recoverable ammonia fertilizer, after process, tail gas is discharged with pipeline.
Ammonia intake of the present invention is: Q1=(2C1 η 1+C2 η 2) Q2 wherein Q1 and Q2 is respectively NH3
With the intake of flue gas, η 1 and η 2 is respectively SO2 removal efficiency and NO removal efficiency, C1 and C2 divides
Biao Shi the volumetric concentration of SO2 and NO in flue gas.
The flue gas that boat diesel engine is discharged when using heavy oil, mainly becomes SO2 and NO and fraction solids
Grains etc., by plasma generator, the plasma body weight of generation contains substantial amounts of high energy electron, and these are high
The oxidisability active particles such as a large amount of H, O, OH, O3 can be produced by electronic action in O2 and H2O.SO2 and NO
Effect at these oxidisability active particles issues biochemical reaction, generates oxysulfide and the nitrogen oxygen of high-valence state
Compound.Meanwhile, be combined with the ammonia being passed through, generate corresponding ammonium salt, set through retracting device and granulation
Standby being recycled into can the ammonium salt that utilizes of secondary, it is achieved the purpose of boat diesel engine tail gas desulfurization denitrification integral.This
Invention uses desulfurization and denitrification integral technology to save equipment investment, reduces floor space, less power supply
Quantity, the discharge power supply efficiency of raising, reduce energy consumption.Meanwhile, in plasma generator of the present invention
Portion is designed with coaxial clyinder shell and tube arrangement mode (as a example by two column), improves plasma and generates
Area, adds the action time of tail gas and plasma, to tail gas flow velocity while improving treatment effeciency
And temperature also has certain control.
The present invention utilizes lower temperature plasma technology to process marine diesel tail gas.Marine diesel tail
Gas is after plasma generator processes, and in tail gas, NO and SO2 is oxidized to high-valence state HNO3 and H2SO4,
The corresponding recyclable ammonium salt of generation is reacted subsequently with the ammonia being passed through.Reach the NO in marine diesel tail gas
Carry out the purpose that processes with SO2 simultaneously.
Plasma generator uses coaxial clyinder dielectric barrier discharge plasma generator.Plasma
Generator be shell and tube arrangement, improve plasma generate area and generate quantity, add tail gas with etc.
The action time of gas ions, while improving treatment effeciency, tail gas flow velocity and temperature also there is certain control.
Meanwhile, the method is applicable to the complex working condition such as normal pressure, humidity.
While the present invention can remove NOx and SOx in ship tail gas at the same time, to the solid in tail gas
Particle (such as PM) also has certain treatment effect.
Ammonia reacts, through dry dust collector with HNO3 and H2SO4 generated through plasma generator oxidation
Form ammonia fertilizer with Granulation Equipments, can recycle, it is to avoid secondary pollution.
The features such as present device investment is little, floor space is little, high treating effect, technological process are simple, joint
Save boats and ships space.
Claims (3)
1. a boat diesel engine tail gas desulfurization denitrification integrated device, is characterized in that: include that plasma is sent out
Raw device, electric supply installation, high-tension electricity maker, dry dust collector, Granulation Equipments, ammonia supply equipment, plasma
Arranging gas inlet, offgas outlet and ammonia entrance on body generator, the blast pipe of boat diesel engine connects
Gas inlet, offgas outlet connects dry dust collector, and dry dust collector connects Granulation Equipments and air respectively,
Electric supply installation connects high-tension electricity maker, and high-tension electricity maker connects plasma generator.
A kind of boat diesel engine tail gas desulfurization denitrification integrated device the most according to claim 1, it is special
Levy and be: described plasma generator includes external electrode, dielectric layer, internal high pressure electrode, described Jie
Matter layer is the U-shaped tubular structure of hollow, and internal high pressure electrode is arranged on inside dielectric layer, internal high pressure electrode
Being fixed by stabilization ring with dielectric layer, external electrode is wrapped on dielectric layer outer wall, and gas inlet is arranged on Jie
One end of matter layer, offgas outlet is arranged on another end of dielectric layer, and ammonia entrance is arranged on medium
The turning of the U-shaped tubular structure of layer, external electrode and internal high pressure electrode connect high-tension electricity maker respectively.
A kind of boat diesel engine tail gas desulfurization denitrification integrated device the most according to claim 2, it is special
Levy and be: described plasma generator is that coaxial clyinder tubular structure, i.e. external electrode and inside are high
Piezoelectricity pole is the U-shape structure consistent with dielectric layer shape, and the two is coaxial with dielectric layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610293190.XA CN105854601B (en) | 2016-05-05 | 2016-05-05 | A kind of boat diesel engine tail gas desulfurization denitrification integrated device |
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| CN201610293190.XA CN105854601B (en) | 2016-05-05 | 2016-05-05 | A kind of boat diesel engine tail gas desulfurization denitrification integrated device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621730A (en) * | 2016-12-19 | 2017-05-10 | 上海环境集团有限公司 | Low-temperature flue gas purifying method |
| CN107138045A (en) * | 2017-06-12 | 2017-09-08 | 青岛双瑞海洋环境工程股份有限公司 | Marine exhaust processing unit for removing sulfur and nitrogen oxides simultaneously |
| CN107433132A (en) * | 2017-09-06 | 2017-12-05 | 哈尔滨工程大学 | A kind of boat diesel engine tail gas nitrogen oxide removing means and removal methods |
| CN109603448A (en) * | 2018-11-13 | 2019-04-12 | 上海离原环境科技有限公司 | A kind of ship tail gas plasma desulfuration denitrating system and system |
| CN110115916A (en) * | 2019-01-30 | 2019-08-13 | 浙江大维高新技术股份有限公司 | The tapping equipment and technique of gas boiler flue gas |
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| CN105050304A (en) * | 2015-08-14 | 2015-11-11 | 山东电力工程咨询院有限公司 | U-shaped plate type dielectric-barrier-discharge-based low-temperature plasma reactor and reactive system |
| CN205700153U (en) * | 2016-05-05 | 2016-11-23 | 哈尔滨工程大学 | A kind of boat diesel engine tail gas desulfurization denitrification integrated device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106621730A (en) * | 2016-12-19 | 2017-05-10 | 上海环境集团有限公司 | Low-temperature flue gas purifying method |
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| CN110115916A (en) * | 2019-01-30 | 2019-08-13 | 浙江大维高新技术股份有限公司 | The tapping equipment and technique of gas boiler flue gas |
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| Publication number | Publication date |
|---|---|
| CN105854601B (en) | 2019-08-06 |
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