CN102549244B - Electric exhaust gas treating method and electric exhaust gas treating device - Google Patents
Electric exhaust gas treating method and electric exhaust gas treating device Download PDFInfo
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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
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/41—Ionising-electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
- B03C3/014—Addition of water; Heat exchange, e.g. by condensation
-
- 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
- F01N3/01—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust by means of electric or electrostatic separators
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
- F01N3/0275—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means using electric discharge means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/06—Ionising electrode being a needle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/30—Details of magnetic or electrostatic separation for use in or with vehicles
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/04—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric, e.g. electrostatic, device other than a heater
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/28—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a plasma reactor
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Electrostatic Separation (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Provided are an electric treatment method for diesel engine exhaust and a device using the method that resolve the problems with conventional diesel engine exhaust treatment technology using corona discharges, facilitating in particular the efficient removal of particulate matter (PM) and especially soluble organic fractions (SOF) from the exhaust of a diesel engine using low-quality fuel, the quality of which is less than or equal to that of fuel oil, as well as stable long-term performance. The electric treatment method for large-displacement diesel engine exhaust removes, with an electrical means, particulate matter mainly composed of insoluble organic fractions (IOF) and soluble organic fractions (SOF) from the exhaust of a diesel engine using low-quality fuel, the quality whereof being less than or equal to that of fuel oil. The particulate matter is removed with the electrical means after the temperature of the total exhaust containing the particulate matter is lowered by a gas cooling means to a temperature which is greater than or equal to 100 DEG C, preferably greater than or equal to 130 DEG C, and which is less than or equal to a temperature in which the ratio (R) of the exhaust temperature to the boiling point of fuel is 0.85.
Description
Technical field
The present invention relates to: remove, the carbon of usining containing in purification diesel engine exhaust is used as the particulate matter (Particulate Matter: hereinafter referred to as PM) of main body or the boats and ships of harmful gas, generating is used, industry is used etc., [heavy oil (Fuel OiL) is in boats and ships industrial quarters particularly to use heavy oil, be labeled as diesel oil (Diesel Oil:DO), diesel oil for boats and ships (Marine Diesel Fuel:MDF) or diesel oil (Marine Diesel Oil:MDD) for boats and ships, admiralty fuel oil (Marine Fuel Oil:MFO), heavy oil (Heavy Fuel Oil:HFD), residual fuel oil (Residual Fuel Oil:RFO), these marks of general name in this application, be called heavy oil (Fuel Oil)] the pump-down process technology of the large air displacement diesel engine of following low-grade fuel, in more detail, relate in discharging the large air displacement diesel engine of high-temperature exhaust air, utilize electrical processing method and the electric treatment device of the exhaust of coronal discharge.
background technique
Various boats and ships or generator and heavy construction machinery, especially various automobiles etc. are as the extensively scope employing of diesel engine of power source, but the PM containing the exhaust of discharging from this diesel engine, not only cause well-known pollution of atmosphere, and be to human body extremely hazardous substances, therefore very important to the purification of this exhaust.Therefore, the method for the electric processing of the improvement of diesel combustion mode or the employing of various discharge filters and employing coronal discharge etc., existing kinds of schemes, wherein a part has supplied practicality.
In this low-emission technology, utilize coronal discharge to carry out the method for electric processing, PM in exhaust is charged by the coronal discharge of sparking electrode, the PM that this is charged, adopt electrostatic force to trap, owing to this sparking electrode being applied to several ten thousand volt high voltage, in addition, be exposed to and have in corrosive exhaust, therefore wish to keep for a long time stable performance.In addition, it is also important charged PM more effectively being carried out to electrostatic precipitation.
Here, the composition of PM in the exhaust of diesel engine (particulate matter), can be divided into 2 parts: organic solvent soluble composition (being called SOF:Soluble Organic Fractions below) and organic solvent insoluble composition (being called ISF:Insoluble Organic Fractions below), wherein, SOF composition is usingd the not combustion composition of fuel or lubricant oil as main component, the harmful matters such as Ppolynuclear aromatic that contain carcinogenesis.On the other hand, ISF part, is to using the low carbon of specific resistance (coal ash) and sulphate (Sulfate: sulphate) composition is as main component, and this SOF composition and ISF composition, consider from its impact on human body, environment, wishes few exhaust.Particularly, the harmful effect degree of PM to organism, when its particle diameter reaches nm size, can be described as and have especially problem.
Here, the inventor etc., as the SOF composition in diesel exhaust gas and ISF composition, as the trapping of the PM of main component, remove means, first propose the static vortex type Exhaust gas purifying device (this Exhaust gas purifying device being called to DPF:Diesel Particulate Filter below) (with reference to patent documentation 1) of electrostatic precipitation machine and whirlwind dust collector combination.While having proposed a kind of this purification plant of employing, in electrostatic precipitation, even under the high voltage that can trap containing the DC50kV of the PM of low-resistivity carbon, carry out the structure that the insulating property of the sparking electrode of this coronal discharge still can keep for a long time.
, this purification plant, its structure as shown in Figure 6, its formation is: from the body wall 1-1 of device body, in body, give prominence to the exhaust induction pipe 7 arranging, run through the peripheral portion side wall in body wall 1-1 outside of this exhaust induction pipe 7 and intercalation, its front end reaches near the front end opening in exhaust induction pipe 7 and the sealing tracheae 5 arranging, by sealing tracheae 5, partly separate with exhaust passageway 1, the front end of its discharging electrode, front end opening from sealing tracheae 5, the outstanding electrode needle 4 configuring in downstream side to exhaust passageway 1, the entrapment plate 3 of the downstream side of exhaust passageway 1 configuration in this device body, with electrode needle 4 is applied to the high-voltage power apparatus 6 of high-voltage dc voltage, also arrange: by the coronal discharge of electrode needle 4, the 2-1 of coronal discharge portion of ejected electron 10, the electric discharge electro-mechanical part that carbon in exhaust G1 is formed with the corona electronics 10 of emitting as the charged electro-mechanical part 2-2 of the particulate matter S of main body, the entrapment plate 3 that traps charged particulate matter S is configured in the body wall 1-1 of device body and forms, because electrode needle 4 can trap the PM of the carbon that the specific resistance that contains in electrostatic precipitation is low, even if must form while applying the high voltage that reaches DC50kV, the insulating property of the electrode needle 4 of coronal discharge are retainable structure still, , as shown in Figure 7, formation is the peripheral part of electrode needle 4, by the 1st layer of insulator coating 4-a containing insulating material coating, the 2nd layer of insulator coating 4-b, the multi-layer coating that the 3rd layer of insulator coating 4-c forms carries out coating, and, front end 4-1 is from the structure of the outstanding certain length of opening end of sealing tracheae 5, the PM arresting efficiency that goes far towards diesel exhaust gas improves and maintenance persistency.Also have, 4-d is that ground wire, G2 are sealing gas.
On the other hand, as the method for the charged PM of electrostatic precipitation, known have a disclosed Exhaust gas purifying device of patent documentation 2.This Exhaust gas purifying device, SOF composition in exhaust is carried out cooling, condense and liquefy, formation has adhering mist, the SOF composition that this is vaporific, by " birdlime principle ", supply ultra micro small-particle, carry out the character of aggegation hypertrophy, and, because this static aggegation produces near acting on collecting electrode, as long as carry out cooling near this collecting electrode, can utilize the character that promotes static aggegation effect, only at the collecting electrode of charged PM aggegation (with reference to Fig. 1 of patent documentation 2, symbol 11a) wall is by cooling energetically, by the liquid SOF composition adhering on this collecting electrode wall is used as to tackiness agent, make electric trapping object component generation aggegation.
Prior art document
Patent documentation
Patent documentation 1 JP 2008-19849 communique
No. 4529013 communique of patent documentation 2 special permissions
summary of the invention
The problem that invention will solve
But, utilize coronal discharge etc. to carry out in the treatment of diesel exhaust technology of electric processing the PM in exhaust, produce the problem of the following stated.
, generating use or marine engines etc., the transportation diesel of the light oil few with using sulphur content is compared, there is especially large air displacement, and, to what use, it is the low-quality below heavy oil, containing a large amount of sulphur content, (the relative light oil of heavy oil is containing the sulphur content of 10～70 times of left and right, according to JIS K2204: light oil, K2205: the large air displacement diesel engine of fuel heavy oil), for example, while adopting the Exhaust gas purifying device of recording in existing patent documentation 1, sulphur content in low-grade fuel below heavy oil, not only in exhaust, as SOF, contain, and become sulphate, therefore must overcome launch device component parts, particularly to relating to the parts of exhaust, produce the problem of corrosion.
In addition, use the float tolerance diesel engine of the automobile installation of the poor high-grade fuel light oil of sulphur content to use the disclosed technology of patent documentation 2 to be, owing to producing static agglutination near dust collecting electrode, therefore needn't cooling all gas, as long as can promote static aggegation effect near cooling dust collecting electrode, therefore only one after the other carry out cooling near dust collecting electrode, make to condense, liquefaction becomes possibility, make its technology charged and trapping, but the oceangoing ship of the low-grade fuel below use heavy oil such as uses at the large air displacement, the diesel engine that flow velocity is fast and delivery temperature is high, or while adopting the many motor of PM discharge capacity, be cooled to the condense part of temperature of liquefaction of PM in high-temperature exhaust air, only be limited near the Local cooling of collecting electrode, therefore cooling capacity is not enough, coolingly become insufficient, when the supply of PM increases, do not increase PM when cooling, due to uncolled and temperature is high, therefore the exhaust containing PM is discharged from.In addition, near cooling collecting electrode only, flows through SOF composition or sulphate composition near the exhaust it, condensed liquefaction, trap, the part of leaving from collecting electrode, mobile exhaust is not almost cooled, therefore the SOF composition in this exhaust body, the liquefaction of not condensed.Therefore, the part of leaving from collecting electrode, the SOF composition collection at large in the exhaust of flowing and discharging.Therefore, use the large air displacement diesel engine of the low-grade fuel below above-mentioned heavy oil, while adopting the Exhaust gas purifying device of recording in the patent documentation 2 that uses the poor high-grade fuel light oil of sulphur content, the launch device that not only above-mentioned sulphate composition causes becomes component corrosion problem, and there is the PM in exhaust, particularly there is the problem of fully not carrying out of removing of SOF composition.
Here, the inventor etc. are in view of this problem, in order to solve the problems referred to above point of the existing diesel pump-down process technology of utilizing coronal discharge, a kind of large air displacement of particularly using the low-grade fuel below heavy oil is provided, PM at a high speed and/or in the diesel exhaust gas of high-flow air-exhaust, particularly can efficiently remove SOF composition or sulphate composition, bring into play electrical processing method and the device thereof of the diesel exhaust gas of long-term and stable performance simultaneously.
For solving the means of problem
The 1st invention of the present invention, it is to using SOF composition and the ISF composition particulate matter as main body by what contain in the exhaust of the diesel engine of the low-grade fuel below using heavy oil, the electric exhaust gas treatment method of the large air displacement diesel engine of removing by electric device, it is characterized in that, pass through gas quench system, whole delivery temperatures containing particulate matter are dropped to more than 100 ℃, preferably more than 130 ℃, after below the temperature being represented than R=0.85 by delivery temperature/fuel boiling temperature, by electric device, removing described particulate matter is characterized in that, use in the exhaust of diesel engine of the low-grade fuel below heavy oil, contain using composition and the composition particulate matter as main body.
The 2nd invention of the present invention, it is to using SOF composition and the ISF composition particulate matter as main body by what contain in the exhaust of the diesel engine of the low-grade fuel below using heavy oil, the electric exhaust gas treatment method of the large air displacement diesel engine of removing by electric device, it is characterized in that, the upstream portion configuration gas cooling portion of the exhaust passageway in electric exhaust gas treatment device, described gas cooling portion drops to the temperature of whole exhausts more than 100 ℃, preferably more than 130 ℃, below the temperature being represented than R=0.85 by delivery temperature/fuel boiling temperature, when by described gas cooling portion, the particulate matter containing in the exhaust that temperature has been declined, charged by electric device, trapping, remove thus.
The 3rd invention of the present invention, it is to using SOF composition and the ISF composition particulate matter as main body by what contain in the exhaust of the diesel engine of the low-grade fuel below using heavy oil, the electric exhaust gas treatment method of the large air displacement diesel engine of removing by electric device, it is characterized in that, the upstream portion configuration gas cooling portion of the exhaust passageway in electric exhaust gas treatment device, described gas cooling portion drops to the temperature of whole exhausts more than 100 ℃, preferably more than 130 ℃, below the temperature being represented than R=0.85 by delivery temperature/fuel boiling temperature, when by described gas cooling portion, the particulate matter containing in the exhaust that temperature has been declined, charged by adopting electronics that coronal discharge emits, trapping, remove thus.
The 4th invention of the present invention, it is to using SOF composition and the ISF composition particulate matter as main body by what contain in the exhaust of the diesel engine of the low-grade fuel below using heavy oil, the electric exhaust gas treatment method of the large air displacement diesel engine of removing by electric device, it is characterized in that, the upstream portion configuration gas cooling portion of the exhaust passageway in electric exhaust gas treatment device, described gas cooling portion drops to the temperature of whole exhausts more than 100 ℃, preferably more than 130 ℃, below the temperature being represented than R=0.85 by delivery temperature/fuel boiling temperature, when by described gas cooling portion, by the organic solvent soluble composition that forms particulate matter, it is the particulate matter of the supercooling gaseous state representing than R with delivery temperature/fuel boiling temperature below 0.85, the electronics of having emitted by coronal discharge and charged, trapping, remove thus.
As the 5th inventive point, in electric exhaust gas treatment method of the present invention, following scheme is preferred: in the downstream side of above-mentioned gas cooling part, by moisture trap, make separation from passed through the exhaust of gas cooling portion remove condensed water.
The 6th invention of the present invention, it is in order to using SOF composition and the ISF composition particulate matter as main body by what contain in the exhaust of the diesel engine of the low-grade fuel below using heavy oil, the electric exhaust gas treatment device of the large air displacement diesel engine of removing by electric device, it is characterized in that, form following formation: the upstream portion of the exhaust passageway in described treatment device possesses gas cooling portion, described gas cooling portion drops to the temperature of whole exhausts more than 100 ℃, preferably more than 130 ℃, below the temperature being represented than R=0.85 by delivery temperature/fuel boiling temperature, in the middle reaches of described exhaust passageway, portion has electric discharge electro-mechanical part, the coronal discharge portion that described electric discharge electro-mechanical part possesses by coronal discharge ejected electron makes the charged electro-mechanical part of particulate matter with the corona electronics of emitting, the downstream portion of exhaust passageway possess trapping charged the trap portion of particulate matter, when gas cooling portion is passed through in described exhaust, the organic solvent soluble composition of described particulate matter is become with the delivery temperature/fuel boiling temperature below 0.85 than the supercooling gaseous state of R Range Representation, send into described electric discharge electro-mechanical part, described particulate matter is removed by electric device.
The 7th invention of the present invention, it is in order to using SOF composition and the ISF composition particulate matter as main body by what contain in the exhaust of the diesel engine of the low-grade fuel below using heavy oil, the electric exhaust gas treatment device of the large air displacement diesel engine of removing by electric device, it is characterized in that, form following formation: the upstream portion of the exhaust passageway in described treatment device possesses gas cooling portion, described gas cooling portion drops to the temperature of whole exhausts more than 100 ℃, preferably more than 130 ℃, below the temperature being represented than R=0.85 by delivery temperature/fuel boiling temperature, in the middle reaches of exhaust passageway portion, configuration periphery is by the electrode needle of multi-layer structure tunicle coating, have and possess the electric discharge electro-mechanical part that the coronal discharge portion that adopts coronal discharge ejected electron by described electrode needle and the corona electronics of emitting make the charged electro-mechanical part of particulate matter, the trap portion at the downstream portion of exhaust passageway with the charged particulate matter of trapping, when gas cooling portion is passed through in exhaust, make the organic solvent soluble composition of described particulate matter become the supercooling gaseous state representing than R with the delivery temperature/fuel boiling temperature below 0.85, send into described electric discharge electro-mechanical part, described particulate matter is removed by electric device.
As the 8th invention, in electric exhaust gas treatment device of the present invention, following scheme is preferred: the downstream side at above-mentioned gas cooling part arranges moisture trap, and described moisture trap is removed condensed water by separation from passed through the exhaust of gas cooling portion.
Invention effect
The electrical processing method of diesel exhaust gas of the present invention and device, to be widely used as boats and ships, generator, means are processed in the exhaust gas purification of the diesel engine of heavy construction machinery and various car power sources, particularly to boats and ships, generating, industry machines etc. use the large air displacement containing the low-grade fuel below sulphur content heavy oil how, the diesel engine of high speed and/or discharge high-flow air-exhaust, or in the diesel exhaust gas of the low-grade fuel below the high use heavy oil of the delivery temperature of discharging, contain with carbon, the ISF composition of sulphate etc. and SOF composition are effectively removed as harmful particulate matter PM of main body, reach high-caliber exhaust gas purification rate.
In addition, use the removal of the PM containing in the diesel exhaust gas of the low-grade fuel below heavy oil, can be with high purification ratio in long-time, stable continuing carries out, for example, even in the diesel engine of such use, still can reach the excellent results of the freedom from repairs in fact that requires in automobile component etc. etc.
In addition, can significantly reduce the PM particle that organism is had to dysgenic nm size, go far towards the improvement of atmosphere environment.
Also have, the electrical processing method of exhaust of the present invention and treatment device, diesel engine not only, and also the various device of low-grade fuel below using the heavy oil many containing sulphur content is, also can effectively be used in the exhaust gas purification of device.
Accompanying drawing explanation
Fig. 1 is the figure of the delivery temperature of diesel engine and the relation of capture rate in expression the present invention.
Fig. 2 is for representing the boiling point diagram of the astatki that diesel engine uses.
The first embodiment's that the configuration of the electric exhaust gas treatment device that Fig. 3 is the diesel engine that represents the present invention relates to forms Block Diagram.
The second embodiment's that the configuration of the electric exhaust gas treatment device that Fig. 4 is the diesel engine that represents the present invention relates to forms Block Diagram.
The figure of Fig. 5 for representing that the particle diameter of PM particle in embodiments of the invention 1 distributes.
The broad cross-section map of one of the electrostatic precipitation portion that Fig. 6 is the electric exhaust gas treatment device of the existing diesel engine of expression example.
Fig. 7 is the sectional view that the corona discharge electrode portion of the electric exhaust gas treatment device shown in Fig. 6 amplifies.
Embodiment
The inventor etc., in order to be adapted to the strict regulations of exhaust, to the Diesel Engine Exhaust Pipe in the exhaust gas treatment device of diesel engine, adopt static whirlwind DPF device and the following exhaust cooling device of the present invention shown in Fig. 6, Fig. 7, the PM catching device in exhaust has been made to the exhaust gas purification situation of various improvement and investigated further.
Found that, by heat exchanger being set on exhaust pipe arrangement, cooling whole exhaust in advance, imports the delivery temperature of the static whirlwind DPF shown in Fig. 1 just, and PM capture rate is had a significant impact.Here, PM capture rate is defined as: capture rate=1-(the PM concentration after DPF processes)/(the PM concentration before DPF processes).In addition, PM concentration is measured according to the method for ISO/DIS8173-1 regulation.
Also have, so-called PM of the present invention, refers to the method that adopts above-mentioned ISO/DIS8173-1, the total material trapping on catcher/filter.
Whole capture rate of PM (SOF composition+ISF composition) in Fig. 1, with η PM represent, the capture rate of SOF composition with η SOF represent, the capture rate of ISF composition represents with η ISF.As can be seen from Figure 1, along with delivery temperature reduces, PM capture rate raises.That is, known: exhaust is more cooling, all the capture rate of PM (SOF composition+ISF composition) more rises, and its rising trend is ISF composition < PM < SOF composition.
Particularly being subject to the composition that delivery temperature has the greatest impact is SOF composition, and along with delivery temperature reduces, the capture rate of SOF composition (η SOF) significantly improves.That is, known: the state that delivery temperature is high, for example, when the delivery temperature that surpasses 300 ℃, SOF composition is difficult to reach high trapping.On the other hand, oneself knows the composition to ISF, and the temperature impact of exhaust is less.
Here, temperature tendency about the trapping of SOF composition, from reference, " Japanese マ リ Application エ Application ジ ニ ア リ Application グ learns to compile: put down into 17 annual boats and ships and discharge Air Pollutants reduction technical research investigation reports, Japan マ リ Application エ Application ジ ニ ア リ Application グ association, in March, 2006, p58-60. ", and reference " Japanese マ リ Application エ Application ジ ニ ア リ Application グ association compiles: the マ リ Application エ Application ジ ニ ア リ Application グ operator basic コ-ス that continues educating, Japan マ リ Application エ Application ジ ニ ア リ Application グ association, in July, 2009, p315-3170 " known, adopt the definite PM concentration determination method of JISZ8808, the filter of trapping use is inserted in outlet pipe, pumping exhaust, because this exhaust is directly passed through filter with high temperature former state, therefore adopt the method, can say ISF composition in the PM only trapping in exhaust, and can not trap SOF composition.
The reason that can not trap this SOF composition can think, high in the delivery temperature in the stage of discharging from diesel engine, and most of SOF composition is in gaseous state.As can be seen here, employing can trap solid or liquid particle, and JIS trapping that can not captured gas, with mechanical type filters such as filter or ceramic DPF, can not trap SOF composition.
Therefore, the self-temperature of exhaust is high, and large flow, flow velocity are fast, in addition, to being discharged to outside, the boats and ships that delivery temperature reduces the large air displacement diesel engine such as use with, generating with, industry machine, and when the Exhaust gas purifying device of the pump-down process related device of the use float tolerance diesel engines such as automobile before this, the delivery temperature before suction Exhaust gas purifying device is high, SOF composition in exhaust is in gaseous state, therefore can not fully remove SOF composition.
On the other hand, even the material that can trap in the occasion of electrostatic precipitation, the particle that can be solid or liquid by dry corona electronics is charged, can not make gas charged, therefore can not carry out Electrostatic.
Therefore, if trap SOF composition in electrostatic precipitation, the exhaust of just having discharged from motor, as the SOF composition of gas, by certain effect, from gaseous state, condense, liquefy, it is necessary for example, in electrostatic precipitation portion (, the charged discharge parts 2 shown in Fig. 6, particularly from electro-mechanical part 2-2 near region entrapment plate 3), existing.
In addition, can think along with Exhaust temperature rise, the gas componant composition in SOF composition increases, the capture rate of SOF composition, and the capture rate temperature tendency shown in the higher Fig. 1 more reducing of delivery temperature is understandable.
Below, the trapping mechanism of the SOF composition in electrostatic precipitation of the present invention, sulphate composition is described.
Fig. 2 is for representing the figure of the boiling point of the astatki as hydrocarbon that diesel engine uses, and transverse axis is carbon (C) number of hydrocarbon composition contained in fuel, the boiling point that the longitudinal axis is this composition.In Fig. 2, the boiling point of each composition links and represents with curve.The chemical general formula C of the hydrocarbon corresponding with the mark of the carbon number n of transverse axis
nh
min, m depends on the chemical structure of hydrocarbon, for example, paraffinic (chain type saturated hydrocarbon) in this way, chemical general formula is C
nh
2n+2, when being greater than 17 general astatki for carbon number n, higher hydrocarbon composition Ppolynuclear aromatic component content is more than light oil.Also have, the carbon number n of the light oil of standard is 14 < n < 20.
Here, the main component that composition generates of not firing from SOF composition as fuel or lubricant oil, considers to flow into the delivery temperature of DPF and the boiling point of fuel.
Be arranged on the DPF inlet side in the air outlet duct system of diesel engine, when the temperature of exhaust is higher than the boiling point of fuel, SOF composition majority exists with gaseous state, otherwise, when the temperature of exhaust is during lower than the boiling point of fuel, SOF composition in exhaust condenses, form liquid state, in fact, SOF composition is the gas former state of unsettled supercooling state, therefore only with mechanical catching devices such as the filter of trapping use or porcelain filters, can not trap the SOF composition of this gaseous state.
Also have, can think that sulphate composition is the main component that the sulphur content that contains in fuel is oxidized, produce, and at its condensation patterns, presents the form same with above-mentioned SOF composition.
Here, the discoveries such as the inventor, as shown in Figure 3, Figure 4, inlet side setting at electric exhaust gas treatment device makes the cooling cooling unit of whole air displacemenies, the whole delivery temperatures that import exhaust gas treatment device are carried out to the result that all changes test to be shown, as shown in Figure 1, by reducing delivery temperature, can improve the capture rate of PM.
; import the electric discharge electro-mechanical part of exhaust gas treatment device in exhaust before; the temperature of whole exhausts is reduced; strengthen the cooling degree (boiling point of this composition and the temperature difference of delivery temperature) of SOF composition; at this state; by coronal discharge during to exhaust electron radiation, the SOF composition of the gaseous state in supercooled state (gaseous state) or sulphate composition, by the stimulation of the electronics liquefaction of condensing.This phenomenon is similar with the phenomenon of understanding by Wilson's fog chamber.The SOF particle that this has liquefied, as by coronal discharge and charged, adopts electrostatic precipitation can trap SOF composition.In addition, can think that sulphate composition too.This is the mechanism that in the electrostatic precipitation of the inferences such as the inventor, SOF composition and sulfuric acid salinity are captured.
According to this mechanism, the cooling degree of SOF composition, sulphate composition is larger, and delivery temperature is lower, can promote condensing of SOF composition or sulphate composition, therefore can improve the capture rate of SOF composition and sulphate composition.
So, by reducing the temperature of exhaust, can improve the capture rate of SOF composition and sulphate composition.As the method that this delivery temperature is reduced, carrying out the device portal side of electrostatic precipitation, the heat-exchange devices such as heat exchanger that arranged before boats and ships arrange are as exhaust cooling device.In addition, as other exhaust cooling device, the spraying device of water or seawater etc. is set, and its water droplet is not by the evaporation completely of aggegation ground, now, from exhaust, draw heat of vaporization, the method that temperature is reduced also can adopt, and because water droplet does not evaporate and aggegation completely, in electrostatic dust-collecting device, accumulates to water droplet former state, become the corrosion of device, essential attention.Yet device materials has corrosion resistance, for example, (for example, Nippon Steel Manufacturing Corp manufactures, trade name: S-TEN1) etc., can be used as countermeasure to adopt stainless steel, corrosionproof steel against sulfuric acid at dew point.
In addition, never make water droplet aggegation and evaporate this some consideration, the spraying of hope employing high-temperature water or high temperature seawater completely.This high-temperature spray, as shown in reference JP 2001-132937 communique, paragraph 0007, the first, owing to being high-temperature water, water droplet particle does not form supersaturation vapor pressure, therefore, there is not aggegation in water droplet each other, and directly evaporation reduces, the cooling possibility that becomes rapidly of exhaust, the second, approximately 1/3 left and right due to the reduced viscosity of water during to normal temperature, water droplet particle is with very tiny state spraying.Here, spraying, the boats and ships for marine navigation, it is economical favourable using seawater.
In addition, the method as delivery temperature is declined, not only can adopt separately the spraying device of the heat-exchange devices such as above-mentioned heat exchanger, water or seawater, and these can be used in combination.
In the present invention, from gas cooling portion discharge, whole delivery temperatures of the electric discharge electro-mechanical part of inflow gas treatment device, be limited to 100 ℃ of above reasons and be, when lower than 100 ℃, moisture in exhaust etc., in collection face, condense in a large number, the PM particulate of piling up in collection face, adheres to by the moisture condensing, be difficult to peel off from collection face, in the gas flow of exhaust, the state that is difficult to disperse, dance in the air with the sudden and violent shape of sand or snow shape moves about downwards, and it is difficult that its reprocessing becomes.Also have, actual situation is that the temperature of whole exhausts that discharge from gas cooling portion, inflow gas treatment device electric discharge electro-mechanical part, as 130 ℃ of left and right, above-mentioned unfavorable condition occurs hardly, from the reprocessing of PM particulate, considers it is preferred.Therefore, in the present invention, the temperature of above-mentioned whole exhausts preferably reaches more than 130 ℃.
In addition, in the downstream side of gas cooling portion, the upstream side of electrostatic precipitation portion, by moisture trap is set, from passing through the exhaust of gas cooling portion, the condensed water that the water vapour that burning is generated, SOF composition, sulphate composition, carbon etc. suspend, separation is in advance removed, and also the temperature of whole exhausts can be cooled to 100 ℃ of left and right.
In the present invention, as representing the cooling level index of delivery temperature, can adopt the delivery temperature/fuel boiling temperature being defined by following formula 1 to compare R.
[formula 1]
Delivery temperature/fuel boiling temperature is than the boiling point of R=delivery temperature ÷ astatki
Also have, the boiling point of the various compositions that contain in the heavy oil of diesel fuel etc., certainly different, in the present invention, using the composition of carbon number lower limit of the heavy oil composition that uses as benchmark, adopt its boiling point, calculate delivery temperature/fuel boiling temperature and compare R.Its reason is, as usings the composition boiling point of carbon number lower limit as benchmark, determines " delivery temperature/fuel boiling temperature is than R ", carbon number composition the more, boiling point is higher, and in heavy oil, the average supercooling degree of contained whole compositions becomes larger, result shows to trap this point from PM, becomes favourable.
This delivery temperature/fuel boiling temperature, than the optimum value of R, adopts marine diesel engine, and fuel is used A heavy oil to test and obtains.The carbon number lower limit composition of the heavy oil composition using in test, adopts heptadecane C17H36 (C=17), adopts its boiling point (approximately 300 ℃), calculates delivery temperature/fuel boiling temperature and compares R.This result shows, while carrying out electrostatic precipitation, as the delivery temperature/fuel boiling temperature at electric discharge electro-mechanical part inlet side, than R preferable range, wishes below 0.85, more preferably below 0.70.Its reason is that, when delivery temperature/fuel boiling temperature surpasses 0.85 than R, almost all SOF composition, sulphate composition liquefy.; in passing through the exhaust of gas cooling portion; organic solvent soluble composition SOF composition and the sulphate composition of PM particle; hope be take and than R, sent into electric discharge electro-mechanical part as the supercooling gaseous state below 0.85 in delivery temperature/fuel boiling temperature; in this delivery temperature/fuel boiling temperature, than R, surpass 0.85 state; SOF composition and the sulphate composition of gaseous state are residual in a large number; SOF composition and the sulphate composition fully measured; the liquefaction of condensing of charged discharge parts below; do not form charged supercooling gaseous state, can not get satisfied purifying effect.
So, in the present invention, inlet side at exhaust gas treatment device, the temperature of whole exhausts that diesel engine is discharged is cooled to the suitable temperature of pump-down process, can effectively trap the PM in whole exhausts, particularly, when delivery temperature is during higher than the boiling point of the hydrocarbon composition of the fuel mix primary coil of using, this effect is brought into play more.Particularly, large-scale, large air displacement, high speed and/or the large flows such as boats and ships are used, generating is used, industry machine is used are discharged the diesel fuel of exhaust, during when using the C heavy oil that crude oil residue composition is many, the C heavy oil of heating or the fuel (many containing SOF composition or sulphate composition) mixing with the A heavy oil of heating, to the sulphur content of tar ingredients (pitch composition) hydrogenation fuel how etc., can obtain significant effect.
Also have, the formation of electric exhaust gas treatment device of the present invention, both can be the device only in time position of gas quench system with the electrostatic precipitation portion that electric discharge electro-mechanical part as shown in Figure 62 and entrapment plate 3 form, in addition, also can be electrostatic precipitation portion time position on there is the 2nd trap portion, for example, the device of whirlwind dust collecting section of patent documentation 1 etc.
Embodiment
Secondly, by embodiment, illustrate in greater detail the present invention.
In order to confirm effect of the present invention, adopt and to using A heavy oil as the marine diesel engine of fuel, adopt electric exhaust gas treatment device of the present invention to carry out following test.Also have, in following embodiment, according to [formula 1] delivery temperature/fuel boiling temperature, than the boiling point of the astatki in the calculating of R, adopt the boiling point (approximately 300 ℃) of heptadecane C17H36 (C=17).
In following embodiment, first, according to the method for above-mentioned ISO/DIS8173-1, carry out the measurement of PM capture rate.
Secondly, in order to investigate the trapping situation of nm size PM particle in exhaust, adopt measuring fine particles device (SMPS; Scanning moves particle size analyzer) particle number below particle diameter 500nm in unit of measurement's volume, PM particle number in the exhaust from diesel engine has just been discharged with adopt purification method of the present invention to process PM particle number in the exhaust after whole exhausts to compare.The unit of particle number, adopts individual/cm
3represent.
In addition, embodiment 1～5 as the first embodiment, the static whirlwind DPF device that employing has electrostatic precipitation portion and a whirlwind dust collecting section configures the device of formation as shown in Figure 3, as the second embodiment's embodiment 6～9, adopt the electrostatic precipitation portion possess electric discharge electro-mechanical part and trap portion to configure as shown in Figure 4 the device of formation.Also have, the exhaust cooling means in each embodiment, is used the exhaust cooling device consisting of known water-cooled multi tube heat exchanger.
Embodiment 1
The present embodiment as the first embodiment, use the device shown in Fig. 3, whole exhausts from motor, by gas quench system, undertaken cooling, the delivery temperature of DPF inlet side is decided to be 247 ℃, delivery temperature/fuel boiling temperature is set in 0.82 than R, measures SOF capture rate (η SOF), PM capture rate (η PM) and ISF capture rate (η ISF).The results are shown in table 1.
Also have, in table 1, the delivery temperature of DPF inlet side, represents that the cooling unit that adopts Fig. 3, Fig. 4 shown device to form carries out cooling delivery temperature.In addition, the evaluation of catching, PM capture rate more than 80%, SOF capture rate more than 70%, ISF capture rate more than 85% represent with ◎, PM capture rate more than 70%, SOF capture rate more than 60%, ISF capture rate more than 80% represent with zero, PM capture rate more than 60%, SOF capture rate 50%, ISF capture rate more than 70% represent with △, and PM capture rate is less than 60%, SOF capture rate is less than 50%, ISF capture rate is less than 80% use * expression.
In addition, in the present embodiment, measure the PM particle trapping situation of nm size.The results are shown in Fig. 5.From the result shown in Fig. 5, the particle number distribution situation (representing with dotted line) of the peak value of the PM particle just having contained in the exhaust from diesel engine is discharged, is 1.5 * 10
7individual/cm
3, and after cooling whole exhaust in advance, implement the PM particle number distribution situation (representing with solid line) after purified treatment, be 1.7 * 10
6individual/cm
3, the PM particle number of nm size reduces greatly.This is that the major part due to the PM particle of nm size is SOF composition and sulphate composition, and by reducing delivery temperature, SOF composition and sulphate composition condense, due to electrostatic precipitation portion is captured.
Embodiment 2
Delivery temperature except DPF inlet side in the present embodiment is decided to be 223 ℃, delivery temperature/fuel boiling temperature is decided to be beyond 0.74 than R, test similarly to Example 1, measure SOF capture rate (η SOF), PM capture rate (η PM) and ISF capture rate (η ISF).It the results are shown in table 1.
Embodiment 3
Delivery temperature except DPF inlet side in the present embodiment is decided to be 198 ℃, delivery temperature/fuel boiling temperature is decided to be beyond 0.66 than R, test similarly to Example 1, measure SOF capture rate (η SOF), PM capture rate (η PM) and ISF capture rate (η ISF).It the results are shown in table 1.
Embodiment 4
Delivery temperature except DPF inlet side in the present embodiment is decided to be 177 ℃, delivery temperature/fuel boiling temperature is decided to be beyond 0.59 than R, test similarly to Example 1, measure SOF capture rate (η SOF), PM capture rate (η PM) and ISF capture rate (η ISF).It the results are shown in table 1.
Embodiment 5
In the present embodiment, the delivery temperature of removing DPF inlet side is decided to be 155 ℃, delivery temperature/fuel boiling temperature is decided to be beyond 0.52 than R, tests similarly to Example 1, measures SOF capture rate (η SOF), PM capture rate (η PM) and ISF capture rate (η ISF).It the results are shown in table 1.
Embodiment 6
The present embodiment as the second embodiment, adopt the device shown in Fig. 4, the delivery temperature of DPF inlet side is decided to be 240 ℃, delivery temperature/fuel boiling temperature is decided to be beyond 0.80 than R, test similarly to Example 1, measure SOF capture rate (η SOF), PM capture rate (η PM) and ISF capture rate (η ISF).It the results are shown in table 1.
Embodiment 7
Delivery temperature except DPF inlet side in the present embodiment is decided to be 200 ℃, delivery temperature/fuel boiling temperature is decided to be beyond 0.67 than R, test similarly to Example 6, measure SOF capture rate (η SOF), PM capture rate (η PM) and ISF capture rate (η ISF).It the results are shown in table 1.
Embodiment 8
Delivery temperature except DPF inlet side in the present embodiment is decided to be 151 ℃, delivery temperature/fuel boiling temperature is decided to be beyond 0.50 than R, test similarly to Example 6, measure SOF capture rate (η SOF), PM capture rate (η PM) and ISF capture rate (η ISF).It the results are shown in table 1.
Embodiment 9
Delivery temperature except DPF inlet side in the present embodiment is decided to be 105 ℃, delivery temperature/fuel boiling temperature is decided to be beyond 0.35 than R, test similarly to Example 6, measure SOF capture rate (η SOF), PM capture rate (η PM) and ISF capture rate (η ISF).It the results are shown in table 1.
Comparative example 1
Delivery temperature except DPF inlet side in the present embodiment is decided to be 357 ℃, delivery temperature/fuel boiling temperature is decided to be beyond 1.19 than R, test similarly to Example 1, measure SOF capture rate (η SOF), PM capture rate (η PM) and ISF capture rate (η ISF).It the results are shown in table 1.It is uncolled and carry out the situation of electric purified treatment that this comparative example is equivalent in fact exhaust.
Comparative example 2
Delivery temperature except DPF inlet side in the present embodiment is decided to be 300 ℃, delivery temperature/fuel boiling temperature is decided to be beyond 1.00 than R, test similarly to Example 1, measure SOF capture rate (η SOF), PM capture rate (η PM) and ISF capture rate (η ISF).It the results are shown in table 1.
Comparative example 3
Delivery temperature except DPF inlet side in the present embodiment is decided to be 274 ℃, delivery temperature/fuel boiling temperature is decided to be beyond 0.91 than R, test similarly to Example 1, measure SOF capture rate (η SOF), PM capture rate (η PM) and ISF capture rate (η ISF).It the results are shown in table 1.
Table 1
As known from Table 1, as delivery temperature/fuel boiling temperature than R below 0.85, can obtain SOF capture rate (η SOF) more than 60%, PM capture rate (η PM) more than 75%, ISF capture rate (η ISF) is in more than 80% high capture rate.
On the other hand, the comparative example that delivery temperature is high, can not get essential satisfied result.
This result shows, the mean P M discharge rate of marine diesel engine, conventionally reach about 0.6g/kWh, the PM discharge rate of having equipped the boats and ships that PM capture rate (η PM) reaches the large air displacement use for diesel engine electric exhaust gas treatment device shown in more than 75% embodiment 0.6 * (1-0.75)=below 0.15g/kWh.
This value, 2012 year of the U.S. of significantly having discharged regulation lower than the PM that implements boats and ships specified value in the 3rd regulation case (with reference to reference, " Japanese マ リ Application エ Application シ ニ ア リ Application Network association compiles: put down into 19 annual boats and ships and discharge Air Pollutants and cut down technical research investigation reports; Japanese マ リ Application エ Application シ ニ ア リ Application Network association; in March, 2008; p90) 0.27g/kWh, met specified value completely.
Also have, the device as shown in Figure 3 using in embodiment 1～5, the PM aggegation ulking thickness of electrostatic precipitation portion trapping increases excessive, as PM aggegation piece, peels off.The PM aggegation piece that this has been peeled off, is trapped by the whirlwind dust collecting section of back segment, is recycled to dust collecting box and preserves.In addition, while using the device shown in Fig. 4 in embodiment 6～9, the PM being trapped by electrostatic precipitation portion, also can adopt mechanical vibration or scrape (scrubbing) device etc., is recycled to dust collecting box and preserves.
In addition, the present invention, in the device shown in Fig. 3, Fig. 4, arranges moisture trap by the downstream side at exhaust cooling device, can be from exhaust separated and/or remove condensed water.By removing in advance this condensed water, the resultant that carrys out bin cure containing in condensed water or from the resultant of nitrogen, in exhaust, reduce, carry out the resultant of bin cure or from the resultant of nitrogen, be adsorbed that to be attached to the ISF (coal ash) of the PM in condensed water upper and reduce, PM in exhaust (SOF, ISF) and reducing from the content of the resultant of nitrogen, the load of DPF is alleviated, and meanwhile, the impaired worry of the durability of motor associated components can further reduce.This effect is remarkable especially when the delivery temperature of discharging from exhaust cooling device reaches 100 ℃ of left and right.Also have, needn't use above-mentioned moisture trap, can remove condensed water completely, large particle is separated with baffle plate (separating plate) collision, fine liquid particle and solid particle, charged by the coronal discharge of back segment, by Coulomb force, be adsorbed on the control of dust that is captured on entrapment plate and remove.
[explanation of symbol]
Claims (14)
1. electric exhaust gas treatment method, it is to using organic solvent insoluble composition and the organic solvent soluble composition particulate matter as main body by what contain in the exhaust of the diesel engine of the low-grade fuel below using heavy oil, the electric exhaust gas treatment method of the large air displacement diesel engine of removing by electric device, it is characterized in that, by gas cooling portion, whole delivery temperatures containing described particulate matter are dropped to more than 100 ℃, after below the temperature being represented than R=0.85 by delivery temperature/fuel boiling temperature, in this delivery temperature, by electric device, remove described particulate matter.
2. electric exhaust gas treatment method, it is to using organic solvent insoluble composition and the organic solvent soluble composition particulate matter as main body by what contain in the exhaust of the diesel engine of the low-grade fuel below using heavy oil, the electric exhaust gas treatment method of the large air displacement diesel engine of removing by electric device, it is characterized in that, the upstream portion configuration gas cooling portion of the exhaust passageway in electric exhaust gas treatment device, described gas cooling portion drops to the temperature of whole exhausts more than 100 ℃, below the temperature being represented than R=0.85 by delivery temperature/fuel boiling temperature, when by described gas cooling portion, to drop in temperature above-mentioned more than 100 ℃, the particulate matter containing in exhaust below the temperature that R=0.85 represents, charged by electric device, trapping, remove thus.
3. electric exhaust gas treatment method, it is to using organic solvent insoluble composition and the organic solvent soluble composition particulate matter as main body by what contain in the exhaust of the diesel engine of the low-grade fuel below using heavy oil, the electric exhaust gas treatment method of the large air displacement diesel engine of removing by electric device, it is characterized in that, the upstream portion configuration gas cooling portion of the exhaust passageway in electric exhaust gas treatment device, described gas cooling portion drops to the temperature of whole exhausts more than 100 ℃, below the temperature being represented than R=0.85 by delivery temperature/fuel boiling temperature, when by described gas cooling portion, to drop in temperature above-mentioned more than 100 ℃, the particulate matter containing in exhaust below the temperature that R=0.85 represents, charged by adopting electronics that coronal discharge emits, trapping, remove thus.
4. electric exhaust gas treatment method, it is to using organic solvent insoluble composition and the organic solvent soluble composition particulate matter as main body by what contain in the exhaust of the diesel engine of the low-grade fuel below using heavy oil, the electric exhaust gas treatment method of the large air displacement diesel engine of removing by electric device, it is characterized in that, the upstream portion configuration gas cooling portion of the exhaust passageway in electric exhaust gas treatment device, described gas cooling portion drops to the temperature of whole exhausts more than 100 ℃, below the temperature being represented than R=0.85 by delivery temperature/fuel boiling temperature, when by described gas cooling portion, by the organic solvent soluble composition that forms particulate matter, it is the particulate matter of the supercooling gaseous state representing than R with delivery temperature/fuel boiling temperature below 0.85, the electronics of having emitted by coronal discharge and charged, trapping, remove thus.
5. electric exhaust gas treatment method claimed in claim 1, it is characterized in that, the upstream portion of the exhaust passageway in described electric exhaust gas treatment method drops to the temperature of whole exhausts below the temperature representing than R=0.85 more than 130 ℃, by delivery temperature/fuel boiling temperature.
6. electric exhaust gas treatment method claimed in claim 2, it is characterized in that, the upstream portion of the exhaust passageway in described electric exhaust gas treatment method drops to the temperature of whole exhausts below the temperature representing than R=0.85 more than 130 ℃, by delivery temperature/fuel boiling temperature.
7. electric exhaust gas treatment method claimed in claim 3, it is characterized in that, the upstream portion of the exhaust passageway in described electric exhaust gas treatment method drops to the temperature of whole exhausts below the temperature representing than R=0.85 more than 130 ℃, by delivery temperature/fuel boiling temperature.
8. electric exhaust gas treatment method claimed in claim 4, it is characterized in that, the upstream portion of the exhaust passageway in described electric exhaust gas treatment method drops to the temperature of whole exhausts below the temperature representing than R=0.85 more than 130 ℃, by delivery temperature/fuel boiling temperature.
9. according to the electric exhaust gas treatment method described in any one in claim 1 to 8, it is characterized in that the downstream side in described gas cooling portion, by moisture trap, makes separation from passed through the exhaust of gas cooling portion remove condensed water.
10. electric exhaust gas treatment device, it is in order to using organic solvent insoluble composition and the organic solvent soluble composition particulate matter as main body by what contain in the exhaust of the diesel engine of the low-grade fuel below using heavy oil, the electric exhaust gas treatment device of the large air displacement diesel engine of removing by electric device, it is characterized in that, form following formation: the upstream portion of the exhaust passageway in described treatment device possesses gas cooling portion, described gas cooling portion drops to the temperature of whole exhausts more than 100 ℃, below the temperature being represented than R=0.85 by delivery temperature/fuel boiling temperature, in the middle reaches of described exhaust passageway, portion has electric discharge electro-mechanical part, the coronal discharge portion that described electric discharge electro-mechanical part possesses by coronal discharge ejected electron makes the charged electro-mechanical part of described particulate matter with the corona electronics of emitting, the downstream portion of described exhaust passageway possess trapping charged the trap portion of described particulate matter, in described exhaust during by described gas cooling portion, the organic solvent soluble composition of described particulate matter is become with the delivery temperature/fuel boiling temperature below 0.85 than the supercooling gaseous state of R Range Representation, send into described electric discharge electro-mechanical part, described particulate matter is removed by electric device.
11. electric exhaust gas treatment devices, it is in order to using organic solvent insoluble composition and the organic solvent soluble composition particulate matter as main body by what contain in the exhaust of the diesel engine of the low-grade fuel below using heavy oil, the electric exhaust gas treatment device of the large air displacement diesel engine of removing by electric device, it is characterized in that, form following formation: the upstream portion of the exhaust passageway in described treatment device possesses gas cooling portion, described gas cooling portion drops to the temperature of whole exhausts more than 100 ℃, below the temperature being represented than R=0.85 by delivery temperature/fuel boiling temperature, in the middle reaches of described exhaust passageway portion, configuration periphery is by the electrode needle of multi-layer structure tunicle coating, have and possess the electric discharge electro-mechanical part that the coronal discharge portion that adopts coronal discharge ejected electron by described electrode needle and the corona electronics of emitting make the charged electro-mechanical part of described particulate matter, the trap portion at the downstream portion of described exhaust passageway with the charged described particulate matter of trapping, in described exhaust during by described gas cooling portion, make the organic solvent soluble composition of described particulate matter become the supercooling gaseous state representing than R with the delivery temperature/fuel boiling temperature below 0.85, send into described electric discharge electro-mechanical part, described particulate matter is removed by electric device.
12. electric exhaust gas treatment devices claimed in claim 10, it is characterized in that, form and to form below: the upstream portion of the exhaust passageway in described electric exhaust gas treatment device possesses gas cooling portion, described gas cooling portion by the temperature of whole exhausts drop to 130 ℃ above, below the temperature that represented than R=0.85 by delivery temperature/fuel boiling point.
Electric exhaust gas treatment device described in 13. claims 11, it is characterized in that, form and to form below: the upstream portion of the exhaust passageway in described electric exhaust gas treatment device possesses gas cooling portion, described gas cooling portion by the temperature of whole exhausts drop to 130 ℃ above, below the temperature that represented than R=0.85 by delivery temperature/fuel boiling point.
14. according to the electric exhaust gas treatment device described in any one in claim 10～13, it is characterized in that, downstream side in described gas cooling portion arranges moisture trap, and described moisture trap is removed condensed water by separation from passed through the exhaust of gas cooling portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-237745 | 2009-10-14 | ||
| JP2009237745 | 2009-10-14 | ||
| PCT/JP2010/068089 WO2011046187A1 (en) | 2009-10-14 | 2010-10-14 | Electric exhaust gas treating method and electric exhaust gas treating device |
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| Publication Number | Publication Date |
|---|---|
| CN102549244A CN102549244A (en) | 2012-07-04 |
| CN102549244B true CN102549244B (en) | 2014-09-24 |
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| CN201080046139.XA Expired - Fee Related CN102549244B (en) | 2009-10-14 | 2010-10-14 | Electric exhaust gas treating method and electric exhaust gas treating device |
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|---|---|
| EP (1) | EP2489843A4 (en) |
| JP (1) | JP5688806B2 (en) |
| KR (1) | KR101335891B1 (en) |
| CN (1) | CN102549244B (en) |
| WO (1) | WO2011046187A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6041418B2 (en) * | 2010-12-16 | 2016-12-07 | 臼井国際産業株式会社 | Exhaust gas purification system for large-displacement marine diesel engines using low quality fuels below heavy oil |
| JP6062660B2 (en) * | 2012-05-15 | 2017-01-18 | 臼井国際産業株式会社 | Large-displacement diesel engine exhaust gas treatment equipment that uses lower quality fuel than heavy oil |
| JP6319794B2 (en) * | 2013-04-26 | 2018-05-09 | 臼井国際産業株式会社 | Exhaust gas purification device for marine diesel engines using low quality fuel such as heavy oil containing sulfur component at high concentration |
| JP6172714B2 (en) * | 2013-05-09 | 2017-08-02 | 臼井国際産業株式会社 | Exhaust gas treatment equipment for marine diesel engines using heavy oil |
| JP6238823B2 (en) * | 2014-04-08 | 2017-11-29 | 臼井国際産業株式会社 | Exhaust gas treatment equipment for marine diesel engines using low quality fuel containing sulfur component at high concentration |
| CN105275545A (en) * | 2014-05-27 | 2016-01-27 | 苏州水兴绿源生物科技有限公司 | Water-proof vehicle exhaust purifier |
| EP3168450A1 (en) * | 2015-11-12 | 2017-05-17 | Winterthur Gas & Diesel Ltd. | Internal combustion engine, method for cleaning exhaust from an internal combustion engine and method for refitting an internal combustion engine |
| CN108049940B (en) * | 2017-09-07 | 2020-10-02 | 同济大学 | Separation recovery unit of water in internal-combustion engine tail gas |
| CN108561208A (en) * | 2018-04-28 | 2018-09-21 | 中国计量大学 | A kind of automobile exhaust gas purifying installation |
| JP2022508859A (en) * | 2018-10-22 | 2022-01-19 | 上海必修福企業管理有限公司 | Engine emission treatment system and method |
| US20220250087A1 (en) * | 2018-10-22 | 2022-08-11 | Shanghai Bixiufu Enterprise Management Co., Ltd. | Engine exhaust dust removing system and method |
| CN111577423B (en) * | 2020-04-01 | 2021-04-23 | 广州盛康动力设备有限公司 | High-energy emission-reduction diesel generator set |
| CN112547310B (en) * | 2020-12-18 | 2023-04-14 | 华能秦煤瑞金发电有限责任公司 | Efficient electrostatic dust collection device with direct-current superposed pulse power supply |
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- 2010-10-14 WO PCT/JP2010/068089 patent/WO2011046187A1/en active Application Filing
- 2010-10-14 CN CN201080046139.XA patent/CN102549244B/en not_active Expired - Fee Related
- 2010-10-14 JP JP2011536180A patent/JP5688806B2/en not_active Expired - Fee Related
- 2010-10-14 EP EP10823455.0A patent/EP2489843A4/en not_active Ceased
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2011046187A1 (en) | 2011-04-21 |
| JPWO2011046187A1 (en) | 2013-03-07 |
| KR101335891B1 (en) | 2013-12-02 |
| EP2489843A4 (en) | 2014-11-05 |
| CN102549244A (en) | 2012-07-04 |
| JP5688806B2 (en) | 2015-03-25 |
| EP2489843A1 (en) | 2012-08-22 |
| KR20120065438A (en) | 2012-06-20 |
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