WO2012153705A1 - Dispositif de purification de gaz d'échappement par voie humide - Google Patents

Dispositif de purification de gaz d'échappement par voie humide Download PDF

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Publication number
WO2012153705A1
WO2012153705A1 PCT/JP2012/061668 JP2012061668W WO2012153705A1 WO 2012153705 A1 WO2012153705 A1 WO 2012153705A1 JP 2012061668 W JP2012061668 W JP 2012061668W WO 2012153705 A1 WO2012153705 A1 WO 2012153705A1
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WO
WIPO (PCT)
Prior art keywords
exhaust gas
liquid
demister
gas
cleaning
Prior art date
Application number
PCT/JP2012/061668
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English (en)
Japanese (ja)
Inventor
隆道 細野
克浩 吉澤
広崇 ▲高▼田
英和 岩▲崎▼
元彦 西村
正憲 東田
Original Assignee
川崎重工業株式会社
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Application filed by 川崎重工業株式会社 filed Critical 川崎重工業株式会社
Publication of WO2012153705A1 publication Critical patent/WO2012153705A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
    • 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
    • F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D2247/04—Regenerating the washing fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D2247/08—Means for controlling the separation process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D2247/10—Means for removing the washing fluid dispersed in the gas or vapours
    • B01D2247/107—Means for removing the washing fluid dispersed in the gas or vapours using an unstructured demister, e.g. a wire mesh demister
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/30—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for treatment of exhaust gases from IC Engines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a wet exhaust gas purification device, and more particularly to a wet exhaust gas purification device capable of removing dust such as unburned carbon components and unburned oil in exhaust gas discharged from a diesel engine.
  • a diesel engine such as a diesel engine is a combustion method in which liquid fuel such as light oil or A heavy oil is directly injected into a combustion chamber, and the evaporated fuel is burned while diffusing into the surrounding air. For this reason, mixing of fuel and air (oxygen) tends to be uneven, and particulate matter dust called particulate matter (hereinafter referred to as “PM”) is generated.
  • PM particulate matter dust
  • diesel engines tend to generate NOx (nitrogen oxides), but if the combustion temperature is lowered to a region where NOx is difficult to generate, the amount of PM emission further increases.
  • PM includes sulfur oxides produced by the reaction of sulfur in the fuel by combustion, soot produced from parts not in contact with the combustion air when the fuel burns, and fuel adhering to the walls of the combustion chamber, etc. And SOF (Soluble Organic Fraction: unburned portion of fuel and lubricant) etc. are included. These cause serious damage to the respiratory tract and are the most important substances to clean diesel exhaust.
  • dust contained in the gas to be treated is captured by bringing the gas to be treated introduced into the apparatus into contact with, for example, mist (mist) water sprayed from a spray nozzle.
  • mist mist
  • a wet exhaust gas purifier that passes a mixed atmosphere of gas and mist liquid through a demister to separate droplets and discharges the purified processing gas out of the system by a suction blower (for example, patents) (See Reference 2 and Patent Reference 3.)
  • the exhaust gas purification device disclosed in Patent Document 1 has a low collection efficiency of fine dust having a particle size of several ⁇ m or less, such as PM in exhaust gas discharged from a diesel engine, and a large amount of dust. In some cases, the filter is likely to be clogged.
  • the wet exhaust gas purification device disclosed in Patent Document 2 includes a demister and a filter that remove oil mist in the gas to be treated discharged from the kitchen space, and deposits adhered to the demister and the filter are heated by heating means. Wash with heated cleaning solution.
  • the wet exhaust gas purification device disclosed in Patent Document 3 cleans dust adhering to the scrubber with the cleaning water supplied from the water pump. Since the demister cleaning water uses the stored water in the apparatus, it is not necessary to supply the cleaning water from another system.
  • the conventional wet exhaust gas purifying apparatus sprays cleaning water from the top and bottom of the demister by means of a spray nozzle to clean and remove PM accumulated in the demister.
  • the PM deposit that closes the gap of the demister contains unburned fuel and lubricating oil, the deposit is very viscous and has low wettability with respect to the washing water. .
  • the present invention provides a wet exhaust gas purification device that can easily clean and remove PM deposited on a demister and that can use a demister with a high collection efficiency and a high exhaust gas purification efficiency. With the goal.
  • the wet exhaust gas purifying apparatus of the present invention is a dust containing liquid treatment means for storing a treatment liquid, a treatment liquid stored in the liquid storage means, and an exhaust gas discharged from a combustion apparatus in gas-liquid contact.
  • Gas-liquid contact means that absorbs and captures the liquid in the processing liquid
  • gas-liquid separation means that is disposed downstream of the gas-liquid contact means and separates the liquid from the exhaust gas after processing including the processing liquid that has captured dust.
  • It is a wet exhaust gas purification device.
  • This wet exhaust gas purification apparatus has a cleaning means for injecting a cleaning liquid to the gas-liquid separation means and removing dust adhering to the gas-liquid separation means, and a cleaning liquid heating means for heating the cleaning liquid.
  • PM deposited on the demister can be easily cleaned and removed. For this reason, it becomes possible to use the demister of the porosity with high collection efficiency, and can provide the wet exhaust gas purification apparatus with high purification efficiency of exhaust gas.
  • FIG. 1 is an overall configuration diagram showing an exhaust gas purification system according to an embodiment of the present invention. It is a schematic block diagram which shows the wet exhaust gas purification apparatus which concerns on embodiment of this invention. It is a schematic block diagram which shows the modification of the wet exhaust gas purification apparatus which concerns on embodiment of this invention.
  • a wet exhaust gas purification apparatus (hereinafter referred to as “scrubber”) according to an embodiment of the present invention will be described with reference to the accompanying drawings.
  • a scrubber suitable for removing dust in exhaust gas discharged from a combustion apparatus of a diesel engine mainly for ships, land-traveling vehicles, and stationary on land will be described.
  • the present invention can be similarly applied to a scrubber that removes dust in exhaust gas discharged from a combustion apparatus such as an industrial boiler or a gasification furnace.
  • liquid in the gas-liquid separation in the following embodiment means that the liquid is finally removed from the fluid in a liquid state, and is included in the fluid before removal. It is not always necessary to be in a “liquid” state.
  • Liquid in gas-liquid separation includes all particles that are suspended in the air but are not in the form of a single gas molecule.
  • the term “demister” is used to perform gas-liquid separation, but the concept of “demister” of the present invention includes what is called a “mist separator”.
  • reference numeral 1 denotes a diesel engine, and in this embodiment, a marine two-cycle diesel engine.
  • the diesel engine 1 has a water cooling jacket (not shown) in a cylinder head, a side wall portion, and the like, and the cooling water flows through the water cooling jacket to cool the portion to a predetermined temperature.
  • a first pipe 100 is connected to the exhaust pipe 10 of the diesel engine 1, and a second pipe 110 is connected to the intake pipe 11.
  • the diesel engine 1 is provided with a supercharger 2.
  • the supercharger 2 is configured by connecting a turbine rotor 20 and a compressor impeller 21 by a shaft body 22.
  • the turbine rotor 20 is connected to the first pipe line 100 (exhaust side), and the compressor impeller 21 is connected to the second pipe line 110 (intake side).
  • the heat energy of the exhaust gas is converted into rotational energy, and the compressor impeller 21 connected to the turbine rotor 20 rotates to air (fluid containing oxygen). From the atmosphere.
  • the air compressed by the compressor impeller 21 of the supercharger 2 is cooled by the air cooler 3 and then supplied to the combustion chamber of the diesel engine 1.
  • the filling rate of the combustion chamber of the diesel engine 1 is increased, and the output of the diesel engine 1 is increased.
  • exhaust gas recirculation for introducing a part of the combustion exhaust gas to the intake side is used.
  • the diesel engine 1 to which EGR is applied has a third pipeline 120 connected so as to bypass the first pipeline 100 and the second pipeline 110.
  • the scrubber 4 that captures PM contained in the exhaust gas of the diesel engine 1 in contact with the treated water in order from the upstream side of the gas flow, and the suction that sucks the treated gas purified by the scrubber 4
  • a blower 7 and a gas cooler 8 for cooling the processing gas are connected, and a part of the exhaust gas of the diesel engine 1 (for example, an exhaust gas amount corresponding to 30% of the total exhaust gas amount) is returned to the second pipe 110. And recirculated to the diesel engine 1.
  • the scrubber 4 can capture SOx (sulfur oxide) by bringing the exhaust gas into contact with the treated water.
  • the scrubber 4 is formed in a vertical cylindrical shape, and includes a lower casing 4a and an upper casing 4b provided on the upper portion of the lower casing 4a.
  • a liquid storage part 41 for storing the processed water (process liquid) 40 is formed.
  • the liquid storage unit 41 is provided with a heater 42 for heating the treated water 40 to a predetermined temperature, and the outside of the lower casing 4a is externally covered with a heat insulating material such as glass wool, so that the treated water 40 is heated to 60 ° C., for example. It is supposed to be retained.
  • treated gas introduction pipe 43 for introducing exhaust gas of the diesel engine 1 (hereinafter referred to as “treated gas”) into the scrubber 4.
  • treated gas exhaust gas of the diesel engine 1
  • a spray nozzle 44 as gas-liquid contact means for spraying mist-like treated water 40 downward with respect to the gas to be treated introduced into the scrubber 4 is disposed above the liquid reservoir 41.
  • a circulation pipe 451 having a circulation pump 45 for transferring the treated water 40 in the liquid reservoir 41 is connected to the spray nozzle 44.
  • the treated water 40 sprayed from the spray nozzle 44 is once collected in the liquid storage unit 41, transferred through a circulation pipe 451, and forms a circulation line for spraying from the spray nozzle 44 again.
  • impurities are removed from the treated water 40 transferred to the spray nozzle 44 by a filter 452.
  • the flow rate of the treated water 40 sprayed from the spray nozzle 44 can be changed as appropriate by adjusting the opening of the valve 453.
  • the mist-like treated water 40 sprayed from the spray nozzle 44 is brought into contact with the gas to be treated.
  • the treated water 40 in the liquid storage unit 41 is bubbled so that the gas and mist It is also possible to create a mixed atmosphere with the liquid and to bring it into contact with the gas to be processed.
  • a processing gas discharge pipe 46 for discharging the processing gas purified by the scrubber 4 is connected to the upper part of the upper casing 4b.
  • two demisters as gas-liquid separation means are arranged along the gas flow path 47.
  • the demisters are a demister 50 and a demister 51 from the gas flow upstream toward the gas flow downstream.
  • the demister 50 on the upstream side of the gas flow and the demister 51 on the downstream side of the gas flow are arranged with a predetermined distance.
  • the number of demisters can be changed as appropriate according to the amount of gas to be processed in the scrubber 4 and the properties of the gas to be processed.
  • the demisters 50 and 51 are structures in which flexible metal strands are entangled with each other to form a corrugated shape, and disk-like members are overlapped so that the corrugated shape is alternated.
  • the demisters 50 and 51 have a function of separating the liquid droplets by passing the mixed atmosphere of the gas sent from the lower casing 4 a and the mist-like liquid through the demisters 50 and 51.
  • the void ratio in the demister 50 and the void ratio in the demister 51 may be substantially the same. However, since the demister 50 on the upstream side of the gas flow may be easily clogged, the demister 50 on the upstream side of the gas flow may be clogged. It is preferable to set the porosity higher than the porosity of the demister 51 on the downstream side of the gas flow.
  • the “porosity” in the demister 50 (51) is, for example, the roughness of the lattice of a metal wire, and the coarser the mesh, the higher the porosity.
  • pressure gauges 520 and 521 are connected to the side wall of the upper casing 4b in order to check whether or not clogging has occurred inside the demisters 50 and 51.
  • the pressure gauges 520 and 521 measure the pressure difference (pressure loss) between the gas flow upstream side and the gas flow downstream side of each demister 50 and 51.
  • a cleaning spray nozzle for cleaning the demisters 50 and 51 is provided.
  • cleaning spray nozzles 53aa spraying cleaning water (cleaning liquid) upward from the vicinity of the gas flow toward the demister 50, and cleaning water spraying downward from the vicinity of the gas flow toward the demister 50.
  • cleaning spray nozzles 53ab are arranged.
  • the cleaning spray nozzles 53aa and 53ab and the cleaning spray nozzles 53ba and 53bb are connected to the branch pipe 54, respectively.
  • Each branch pipe 54 is connected to a branch pipe 55 having valves 550 and 551, and these are connected to a hot water heater 60 that is a cleaning liquid heating means via a hot water supply pipe 56.
  • a valve is provided in each branch pipe 54, and both of the spray nozzles 53aa and 53ab (53ba and 53bb) are used at the same time by independently controlling the opening and closing of these valves.
  • a configuration that can be used is also possible.
  • the water heater 60 is set so that the washing water becomes, for example, warm water of 60 ° C. Thereby, the washing water heated from the washing spray nozzles 53aa, 53ab, 53ba, 53bb is sprayed.
  • FIG. 3 is a modification of the scrubber 4 of the present embodiment.
  • two cleaning spray nozzles 53ba spraying upward cleaning water (cleaning liquid) from the vicinity of the gas flow upstream toward the central region 51a of the demister 51, and upward cleaning water toward the outer peripheral region 51b of the demister 51.
  • Two cleaning spray nozzles 53bb for spraying are disposed.
  • Two cleaning spray nozzles 53cb for spraying are disposed.
  • the branch pipe L1 connecting each of the cleaning spray nozzles 53ba and 53bb is provided with valves V1 and V2, and the opening and closing of these valves V1 and V2 are controlled independently to thereby control the spray nozzles 53ba and 53bb. Both can be used at the same time, or either one can be selected and used.
  • the branch pipe L1 connecting the cleaning spray nozzles 53ca and 53cb is also provided with valves V3 and V4.
  • both the spray nozzles 55ba and 55bb can be used at the same time, or one of them can be selected and used. . Thereby, even if the scrubber 4 is in operation, the demister 51 can be cleaned without sealing the demister 51 with cleaning water.
  • the number of spray nozzles can be changed as appropriate according to the amount of gas to be processed in the scrubber 4, the sizes of the scrubber 4 and the demisters 50 and 51, the desired cleaning range, and the like.
  • the heated washing water may be obtained by exchanging heat with another heat medium.
  • a heat exchanger 65 for recovering the sensible heat of exhaust gas from the diesel engine 1 is separately provided, and the normal temperature wash water supplied from the wash water supply source 70 is used as the heat exchanger.
  • the cleaning water heated to about 60 ° C. by supplying to 65 may be produced and supplied to the cleaning spray nozzles 53aa and 53ab and the cleaning spray nozzles 53ba and 53bb.
  • the heat exchanger 65 may recover the sensible heat of the cooling water (about 80 to 90 ° C.) of the diesel engine 1 instead of the one that recovers the exhaust gas sensible heat of the diesel engine 1.
  • a pipe 67 having a valve 671 is branched from the circulation pipe 451 and the pipe 67 is connected to the hot water supply pipe 56, and the treated water 40 at about 60 ° C. stored in the liquid storage section 41 is supplied.
  • the cleaning spray nozzles 53aa and 53ab and the cleaning spray nozzles 53ba and 53bb may be supplied.
  • the heat energy of the exhaust gas is converted into rotational energy, and the compressor impeller 21 connected to the turbine rotor 20 rotates to suck air (fluid containing oxygen) from the atmosphere.
  • the air compressed by the compressor impeller 21 of the supercharger 2 is cooled by the air cooler 3 and then supplied to the combustion chamber of the diesel engine 1.
  • the exhaust gas discharged from the supercharger 2 is diffused into the atmosphere through an exhaust silencer (not shown).
  • a part of the exhaust gas from the diesel engine 1 (for example, the exhaust gas amount corresponding to 30% of the total exhaust gas amount) is introduced into the scrubber 4 through the third pipe line 120 as the gas to be treated.
  • the scrubber 4 captures PM contained in the gas to be treated by bringing the water to be treated into contact with the gas to be treated.
  • the processing of the gas to be processed by the scrubber 4 will be described later with reference to FIG.
  • the processing gas purified by the scrubber 4 is discharged by the suction blower 7, cooled to a predetermined temperature by the gas cooler 8, and recirculated to the diesel engine 1 through the second pipe 110.
  • the gas to be treated introduced into the scrubber 4 is in countercurrent contact with the mist-like treated water 40 (about 60 ° C.) sprayed from the spray nozzle 44. Thereby, the PM contained in the gas to be treated is absorbed in the treated water 40 and captured. Thereafter, the mixed atmosphere of the gas and the mist-like liquid (treated water 40) is sent along the gas flow path 47 to demisters 50 and 51 as gas-liquid separation means in the upper casing 4b. The mixed atmosphere of the gas sent from the lower casing 4a and the mist-like liquid passes through the demisters 50 and 51, so that the liquid droplets are separated, and the liquid droplets are collected in the liquid storage part 41 in the lower casing 4a. Is done. On the other hand, the processing gas purified by passing through the demisters 50 and 51 is discharged by a suction blower (not shown).
  • the pressure difference (pressure loss) between the gas flow upstream side and the gas flow downstream side of each demister 50 and 51 is measured during the operation of the scrubber 4. It is preferable to monitor the indicated values of the pressure gauges 520 and 521 constantly or at regular intervals.
  • the demister 50 When the indicated value shows a predetermined value or more during operation, there is a high probability that the corresponding demister 50 (51) is clogged. In the description of this operation, it is assumed that the demister 50 is clogged. In this case, first, the water heater 60 is activated. Then, the valve 550 of the branch pipe 55 communicating with the cleaning spray nozzles 53aa and 53ab is opened, and the cleaning water heated to about 60 ° C. with respect to the demister 50 from the gas flow upstream side and the gas flow downstream side of the demister 50. Spray.
  • the spray of cleaning water on the demister 50 (51) may be continuous spraying. However, when the cleaning water is sprayed on the entire area of the demister 50 (51) as in the present embodiment, the water film of the cleaning water becomes the demister 50 (51). There is a possibility that the pressure difference (pressure loss) between the gas flow upstream side and the gas flow downstream side of the demister increases during cleaning. In such a case, as described in the modification of FIG. 3, each cleaning spray nozzle may be divided into partial regions, and a valve may be provided for each region so that the cleaning water is not sprayed on the entire surface of the demister.
  • the PM containing oil accumulated in the demister 50 comes into contact with the heated cleaning water, the PM deposit is warmed. As a result, the deposit containing oil begins to drip in the form of a heated low-viscosity liquid, and the PM deposit that has become liquid is easily washed away by the jet of cleaning water. In this case, since the PM containing oil accumulated in the demister 50 starts to drip in the form of a low-viscosity liquid by the heated washing water, the deposit is completely washed and removed. The cleaning time and cleaning water required are very small.
  • valve 550 of the branch pipe 55 is closed to stop the supply of the cleaning water to the cleaning spray nozzles 53aa and 53ab. It should be noted that the same procedure as described above is performed when the PM containing oil accumulated in the demister 51 is cleaned and removed.
  • the control means (not shown) of the scrubber 4 takes pressure measurement data and determines whether the demister 50 (51) is clogged, and then the heated cleaning water.
  • the spray control may be executed.
  • the spray of the cleaning water by the cleaning spray nozzles 53aa and 53ab may be sprayed simultaneously from the vertical direction to the demister 50 (51) as in the present embodiment.
  • the spray nozzle 53aa , 53ab (53ba, 53bb) may be added one by one, and either one of the upper direction and the lower direction may be selected and sprayed with cleaning water.
  • these spraying times may overlap each other or may not overlap each other.
  • the PM containing the oil accumulated in the demister 50 (51) is made into a low-viscosity liquid with the heated washing water, and then heated. Since the washed water is sprayed, the washing time and amount of washing water required for washing / removal are very small. After being cleaned and removed, the demister 50 (51) can be reused in a state almost similar to a new one.
  • the demister 50 (51) that has been cleaned and removed as described above can be reused in a state almost similar to a new one, a pressure difference (pressure) between the gas flow upstream side and the gas flow downstream side of the demister 50 (51). Loss), the power of the suction blower 7 due to an increase in pressure loss, and the problem that the suction blower 7 falls short of exhaust gas suction can be avoided. Further, even when a part of the exhaust gas of the diesel engine 1 (for example, the exhaust gas amount corresponding to 30% of the total exhaust gas amount) is recirculated to the diesel engine 1 as in the present embodiment, the exhaust gas recirculation is performed. There is no shortage of volume.
  • a demister with a low porosity (high collection efficiency) was clogged early and difficult to use, but in the present embodiment, it contains oil accumulated in the demister 50 (51). Since PM can be easily cleaned and removed, one having a low porosity (high collection efficiency) can be used. Thereby, the dust removal performance of the scrubber 4 is improved. Since the dust removal performance of the scrubber 4 is improved, the dust mixed in the suction blower 7, the gas cooler 8, and the diesel engine 1 connected thereto can be extremely reduced. As a result, the maintenance of those facilities becomes easy and the lifetime can be extended.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation Of Particles Using Liquids (AREA)
  • Separating Particles In Gases By Inertia (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Treating Waste Gases (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

L'invention fournit un dispositif de purification de gaz d'échappement par voie humide qui tout en permettant de nettoyer/récurer facilement des matières particulaires déposées sur des dévésiculeurs, permet la mise en œuvre de dévésiculeurs à rapport de vide de rapport de captation élevé, et qui présente une efficacité de purification de gaz d'échappement élevée. Le dispositif de purification de gaz d'échappement par voie humide de l'invention, après transformation sous forme d'un liquide de faible viscosité des matières particulaires contenant une huile qui se dépose sur la partie interne des dévésiculeurs (50) (51) à l'aide d'une eau de nettoyage chauffée, et comme l'eau de nettoyage ainsi chauffée est pulvérisée, réduit considérablement la durée de nettoyage et la quantité d'eau de nettoyage nécessaires au nettoyage/récurage. Les dévésiculeurs (50) (51) après avoir été nettoyés/récurés, peuvent être à nouveau mis en œuvre dans un état sensiblement similaire à celui d'un article neuf. Par conséquent, il est possible d'éviter des problèmes tels qu'une augmentation de perte de pression côtés amont et aval de l'écoulement de gaz dans les dévésiculeurs (50) (51), une augmentation de puissance d'un aspirateur-soufflante (7) due à une élévation de perte de pression, et une aspiration déficiente de gaz d'échappement par l'aspirateur-soufflante (7).
PCT/JP2012/061668 2011-05-11 2012-05-07 Dispositif de purification de gaz d'échappement par voie humide WO2012153705A1 (fr)

Applications Claiming Priority (2)

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JP2011-106545 2011-05-11
JP2011106545A JP2012237242A (ja) 2011-05-11 2011-05-11 湿式排ガス浄化装置

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CN104307279A (zh) * 2014-11-12 2015-01-28 广西天源生物之本环保科技有限公司 一种湿式除尘和余热回收装置
CN105771490A (zh) * 2016-02-03 2016-07-20 浙江湘牛环保科技发展有限公司 高湿度粉尘处理***
EP3085911A1 (fr) * 2015-04-22 2016-10-26 Wärtsilä Moss AS Épurateur en ligne à double système d'eau
CN106310843A (zh) * 2016-08-18 2017-01-11 无锡飞达纺织印染机械有限公司 一种工业废气过滤装置
CN108970299A (zh) * 2018-08-14 2018-12-11 广州市迪瑞喷雾机械有限公司 具有除尘除异味冷却功能的废气净化处理用喷淋***
CN109200697A (zh) * 2018-11-02 2019-01-15 合肥林夏智能科技有限公司 一种自动化除尘装置
WO2019071705A1 (fr) * 2017-10-13 2019-04-18 山东佩森环保科技股份有限公司 Tour de lavage pour gaz d'échappement d'un bateau
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CN112246018A (zh) * 2020-07-23 2021-01-22 彭志南 电瓶车尾气处理器
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