WO2017039268A1 - 배기가스 정화 시스템 및 이의 모니터링 방법 - Google Patents
배기가스 정화 시스템 및 이의 모니터링 방법 Download PDFInfo
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- WO2017039268A1 WO2017039268A1 PCT/KR2016/009610 KR2016009610W WO2017039268A1 WO 2017039268 A1 WO2017039268 A1 WO 2017039268A1 KR 2016009610 W KR2016009610 W KR 2016009610W WO 2017039268 A1 WO2017039268 A1 WO 2017039268A1
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- Prior art keywords
- reduction catalyst
- selective reduction
- catalyst device
- exhaust gas
- pressure
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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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
- F01N3/2066—Selective catalytic reduction [SCR]
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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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent
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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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
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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
- 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
- F01N2240/20—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 flow director or deflector
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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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/38—Honeycomb supports characterised by their structural details flow channels with means to enhance flow mixing,(e.g. protrusions or projections)
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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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/02—Catalytic activity of catalytic converters
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/12—Other sensor principles, e.g. using electro conductivity of substrate or radio frequency
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
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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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
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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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
- F01N2900/1402—Exhaust gas composition
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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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
- F01N2900/1406—Exhaust gas pressure
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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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
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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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1621—Catalyst conversion efficiency
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- 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
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- 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
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to an exhaust gas purification system and a monitoring method thereof. More particularly, the present invention relates to an exhaust gas purification system having a selective reduction catalyst device and a monitoring method thereof.
- the urea water injected from the reducing agent injection module may be attached to the inner wall of the selective reduction catalyst device and crystallized.
- urea water may be combined with soot or the like to block the inlet of the selective reduction catalyst device.
- the performance of the selective reduction catalyst device may be lowered, and the exhaust gas pressure of the engine may be increased to lower the performance of the engine.
- One object of the present invention is to provide an exhaust gas purification system.
- Another object of the present invention is to provide a method for monitoring the performance of an exhaust gas purification system.
- an exhaust gas purification system is installed in a housing that can be mounted to an exhaust pipe from which an exhaust gas is discharged from an engine and injects a reducing agent into the housing.
- a selective reduction catalyst device for reducing the nitrogen oxides by catalytically reacting a nitrogen oxide in the exhaust gas with a reducing agent injected from the reducing agent injection module and installed at a rear of the reducing agent injection module in the housing;
- a differential pressure sensor for measuring a pressure difference between a pressure in front of the device and a pressure behind the selective reduction catalyst device, and receiving pressure information from the differential pressure sensor and outputting a first warning signal when the received pressure is below a preset pressure It includes a control device for.
- the exhaust gas purification system may further include an air volume sensor for measuring an amount of air sucked into the engine, and the control device receives information about the intake air amount from the air volume sensor. By controlling the reducing agent injection amount of the reducing agent injection module.
- the air mass sensor may be a Manifold Absolute Pressure (MAP) sensor.
- control device may receive concentration information of nitrogen oxide from the first and second concentration sensors, and from the received concentration information, nitrogen oxide conversion efficiency of the selective reduction catalyst device. May be calculated, and when the calculated switching efficiency is less than or equal to a preset switching efficiency, a second warning signal different from the first signal may be output.
- control device outputs a third warning signal different from the first and second warning signals when the switching efficiency is greater than or equal to a preset switching efficiency and the received pressure is greater than or equal to a preset pressure. can do.
- the exhaust gas purification system may further include a display device configured to notify the driver of the first to third warning signals, wherein the display device is less than or equal to a preset conversion efficiency.
- the display device may include a first display unit that operates, and a second display unit that operates when the received pressure is greater than or equal to a preset pressure.
- the exhaust gas purification system may further include a display device to notify the driver of the first warning signal.
- the exhaust gas purification system may be installed between the reducing agent injection module and the selective reduction catalyst device, and may further include a mixing device for uniformly mixing the reducing agent with the exhaust gas.
- the differential pressure sensor may be connected to a first pressure line connected to the front of the selective reduction catalyst device and a second pressure line connected to the rear of the selective reduction catalyst device.
- the housing may be connected to the carrier front housing and the housing in which the carrier is installed, and the first pressure line may be disposed between the mixing device and the carrier installed inside the selective reduction catalyst device. Can be connected to.
- the monitoring method of the exhaust gas purification system is the pressure difference of the exhaust gas before and after the selective reduction catalyst device and nitrogen contained in the exhaust gas
- the concentration of the oxide is detected.
- the nitrogen oxide conversion efficiency of the selective reduction catalyst device is calculated from the detected concentration information. From the calculated conversion efficiency and the detected pressure difference, it is determined whether the selective reduction catalyst device is abnormal. If it is determined that there is an error in the selective reduction catalyst device, a warning signal is output.
- the determining of whether the selective reduction catalyst device is abnormal may include: when the calculated conversion efficiency is less than or equal to a preset conversion efficiency or when the measured pressure difference is greater than or equal to a preset pressure. It may include determining that there is an error.
- the determining whether the selective reduction catalyst device is abnormal may include determining that a part of the selective reduction catalyst device is blocked when the measured pressure difference is greater than or equal to a preset pressure. Inducing cleaning.
- FIG. 1 is a perspective view illustrating an exhaust gas purification system according to exemplary embodiments.
- FIG. 3 is a flowchart illustrating a method for monitoring performance of an exhaust gas purification system according to exemplary embodiments.
- first, second, etc. are used herein to describe various members, parts, regions, and / or parts, it is obvious that these members, parts, regions, and / or parts should not be limited by these terms. Do. These terms are only used to distinguish one member, part, region or part from another region or part. Thus, the first member, part, region, or portion, which will be described below, may refer to the second member, component, region, or portion without departing from the teachings of the present invention.
- FIG. 1 is a perspective view illustrating an exhaust gas purification system according to exemplary embodiments.
- FIG. 2 is a cross-sectional view illustrating the exhaust gas purification system of FIG. 1.
- the control device 140, and the warning signal may comprise a display device 180 to inform the operator.
- the position "front” indicates that the engine is relatively closer to the engine based on the flow F of the exhaust gas discharged from the engine, and the position "rear” indicates the exhaust gas emitted from the engine. Relative farther from the engine relative to the flow (F).
- the engine may be a mechanical engine.
- the mechanical engine may be an engine of a mechanical method, for example, a method of manually adjusting the condition of the engine by a driver's pedal or throttle lever operation.
- the electronic engine may be an engine in which the condition of the engine is automatically adjusted by an electronic control unit (ECU). That is, unlike the electronic engine in which the electronic control unit (ECU) automatically controls the fuel injection amount, the intake air amount, the reducing agent injection amount, and the like, the mechanical engine allows the driver to manually adjust the fuel injection amount using a pedal or a lever. Can be controlled.
- the control device 140 to be described later may automatically control the reducing agent injection amount of the reducing agent injection module 130 using the intake air amount information of the engine received from the air volume sensor 170.
- Exhaust gas discharged from the engine may be introduced into the housing 110 through the exhaust pipe.
- the exhaust gas may be mixed with the reducing agent by the reducing agent injection module 130 in the housing 110, and the nitrogen oxide NO x may be removed by the selective reduction catalyst device 120 and discharged to the outside.
- first and second concentration sensors 150 and 152 and first and second pressure lines 162 and 164 may be installed at one side wall of the housing 110.
- the reducing agent injection module 130 is installed in front of the selective reduction catalyst device 120 and injects a reducing agent such as urea into the housing 110 to reduce nitrogen oxides contained in the exhaust gas discharged from the engine. can do.
- the reducing agent injection module 130 may inject the reducing agent at an injection amount corresponding to a change in the amount of air flowing into the engine, a change in the concentration of nitrogen oxides in the exhaust gas, or a combination thereof.
- Control of the reducing agent injection amount may be controlled through a separate control device provided in the control device 140 or the reducing agent injection module 130 to be described later.
- the engine intake air amount change may be detected by the air amount sensor 170 to be described later or calculated based on a pedal or lever manipulation amount of a driver.
- the concentration change of the nitrogen oxide may be detected through the first concentration sensor 150 described later.
- the reducing agent injection amount may be corrected by receiving feedback of the detection amount of the nitric oxide of the second concentration sensor 152 which will be described later.
- the reducing agent injection module 130 may be connected to the reducing agent storage tank 132 through the reducing agent supply line 134 to inject the reducing agent into the housing 110. Since the temperature of the exhaust gas discharged from the engine is a high temperature of several hundred °C, the reducing agent injected in the housing 110 can be vaporized immediately. The vaporized reducing agent may be mixed with the exhaust gas, and the nitrogen oxide may be catalytically reacted with the reducing agent in the selective reduction catalyst device 120 to be reduced to nitrogen gas and water.
- the selective reduction catalyst device 120 is installed at the rear of the reducing agent injection module 130 inside the housing 110, and converts nitrogen oxides into harmless nitrogen (N 2 ) by reducing nitrogen oxides by the following reaction schemes 1 to 3. You can.
- Urea (NH 2 ) 2 CO supplied through the reducing agent injection module 130 may generate ammonia (NH 3 ) by hydrolysis.
- the ammonia thus produced can be converted to nitrogen (N 2 ), which is harmless to the human body by reducing NO and NO 2 .
- the selective reduction catalyst device 120 may include a carrier 122 having a plurality of passages 124.
- the carrier 122 can increase the contact area between the selective reduction catalyst device 120 and the exhaust gas by having a plurality of passages 124 extending in the axial direction.
- the exhaust gas purification system may further include an ammonia slip catalyst device (not shown) installed behind the selective reduction catalyst device 120 to remove ammonia in the exhaust gas.
- an ammonia slip catalyst device (not shown) installed behind the selective reduction catalyst device 120 to remove ammonia in the exhaust gas.
- Ammonia generated by the reducing agent injected from the reducing agent injection module 130 may reduce nitrogen oxides in the exhaust gas.
- ammonia may be supplied in a larger amount than the stoichiometric amount.
- ammonia slip may prevent the ammonia slip phenomenon by removing ammonia not consumed in the selective reduction catalyst device 120.
- the first concentration sensor 150 is installed on one side wall of the housing 110 in front of the selective reduction catalyst device 120, and the second concentration sensor 152 is located behind the housing 110 of the selective reduction catalyst device 122. It may be installed on one side wall.
- the first and second concentration sensors 150 and 152 may measure the concentration of nitrogen oxide (NO X ) contained in the exhaust gas inside the housing 110. That is, the first concentration sensor 150 may measure the nitrogen oxide concentration in the exhaust gas flowing into the selective reduction catalyst device 120, and the second concentration sensor 152 may be discharged from the selective reduction catalyst device 120.
- the concentration of nitrogen oxides in the exhaust gas can be measured.
- the measured concentration information may be input to the control device 140.
- the differential pressure sensor 160 may include a first pressure line 162 and a second pressure line 164 extending from the interior of the housing 110 to the exterior of the housing 110. .
- One end of the first pressure line 162 may contact the exhaust gas through one side wall of the housing 110 in front of the selective reduction catalyst device 120, and the other end may be connected to the differential pressure sensor 160.
- One end of the second pressure line 164 penetrates through one side wall of the housing 110 behind the selective reduction catalyst device 120 and contacts the exhaust gas, and the other end may be connected to the differential pressure sensor 160.
- the first and second pressure lines may be hoses connecting the differential pressure sensor and the inside of the housing. The first and second pressure lines described above may be connected to the exhaust pipe instead of the housing.
- the first pressure line may be connected to the inside of the housing between the mixing device 190 and the carrier 122. In this case, whether or not masking caused by accumulation of foreign matter on the inlet side of the carrier 122 may be confirmed through pressure measurement. In addition, as described above, when the housing is separated, difficulty in disassembly and assembly by the first pressure line 162 may be prevented.
- a separate pressure sensor may be installed separately from the first and second pressure lines described above in front of the mixing device 190. In this case, clogging phenomena in each of the mixing apparatus 190 and the carrier 122 can be detected separately from each other.
- the differential pressure sensor 160 is connected to the first pressure line 162 and the second pressure line 164, and measures the difference between the pressure inside the first pressure line 162 and the pressure inside the second pressure line 164. can do.
- the pressure inside the first pressure line 162 may be the same as the pressure inside the housing 110 in front of the selective reduction catalyst device 120
- the pressure inside the second pressure line 164 may be a selective reduction.
- the pressure inside the housing 110 behind the catalytic device 120 may be the same. That is, the differential pressure sensor 160 may detect a pressure difference in the housing 110 in front of and behind the selective reduction catalyst device 120. The detected pressure information may be input to the control device 140.
- the exhaust gas purification system 100 may further include an air mass sensor 170 for determining the amount of air flowing into the engine.
- the air mass sensor 170 is connected to the intake manifold of the engine and may measure the amount of air flowing into the engine.
- the measured air amount information is input to the control device 140, and the control device 140 may determine the reducing agent injection amount in the reducing agent injection module 130 using the input air amount information and the nitrogen oxide concentration information in the exhaust gas. have.
- the air mass sensor 170 may be a Manifold Absolute Pressure (MAP) sensor.
- MAP Manifold Absolute Pressure
- the Marp sensor may be installed at the intake manifold or may be installed at one side of the housing 110 to be connected to the intake manifold.
- the Marp sensor can indirectly detect the amount of air entering it from the engine by measuring the absolute pressure in the intake manifold.
- the detected intake air amount information may be input to the control device 140.
- the control device 140 may be mounted on one side of the housing 110 or may be mounted separately from the housing 110 in a vehicle.
- the control device 140 may receive information from the sensors 150, 152, 160 and 170, control the reducing agent injection module 130 using the received information, or output a warning signal to the driver.
- the information detected from the sensors 150, 152, 160, 170 may be controlled via wireless communication, for example, a controller area network (CAN), a local interconnect network (LIN), a FlexRay, or the like. May be sent to the device 140.
- CAN controller area network
- LIN local interconnect network
- FlexRay FlexRay
- the sensors 150, 152, 160, 170 may be directly connected to the control device 140 through a wire.
- the control device 140 may determine whether the selective reduction catalyst device 120 is abnormal and output a warning signal to the driver.
- the control device 140 may receive information on the concentration of nitrogen oxide in the housing 110 from the first and second concentration sensors 150 and 152. Specifically, the nitrogen oxide concentration information received in front of the selective reduction catalyst device 120 from the first concentration sensor 150, and the nitrogen oxide concentration behind the selective reduction catalyst device 120 from the second concentration sensor 152. Information can be received.
- the control device 120 may calculate the nitrogen oxide conversion efficiency of the selective reduction catalyst device 120 using the received concentration information, and compare the calculated conversion efficiency with a preset efficiency (hereinafter referred to as 'setting efficiency'). By doing so, it may be determined whether the selective reduction catalyst device 120 is abnormal. That is, when the calculated conversion efficiency is greater than or equal to the set efficiency, it may be determined that the performance of the selective reduction catalyst device 120 is normal.
- the selective reduction catalyst device 120 may deteriorate and may need to be replaced.
- the control device 120 may output a warning signal to replace the selective reduction catalyst device 120 with the display device 180.
- the driver may solve the problem by replacing the selective reduction catalyst device 120 with a new one.
- control device 140 is a pressure difference between the pressure inside the housing 110 in front of the selective reduction catalyst device 120 and the pressure inside the housing 110 behind the selective reduction catalyst device 120 from the differential pressure sensor 160. Information can be received.
- the control device 140 may determine whether the selective reduction catalyst device 120 is abnormal by comparing the received pressure difference with a preset pressure (hereinafter, referred to as 'setting pressure').
- the selective reduction catalyst 120 when the received pressure difference is less than or equal to the set pressure, it may be determined that the selective reduction catalyst 120 operates normally, and when the received pressure difference exceeds the set pressure, the selective reduction catalyst device 120 It can be judged that there is an error in.
- the exhaust gas when a low quality fuel is used, the exhaust gas may contain a large amount of impurities such as soot, and the impurities may be combined with a reducing agent to prevent the front end of the selective reduction catalyst device 120. In this case, the pressure difference between the front and rear of the selective reduction catalyst device 120 may be large.
- the control device 140 may output a warning signal to clean the selective reduction catalyst device 120 to the display device 180.
- the cleaning may allow the driver to increase the fuel injection amount to increase the temperature of the exhaust gas so that impurities coupled to the selective reduction catalyst device 120 may be removed.
- the cleaning operation may be performed by a driver or an operator by manually removing the housing. Such manual cleaning may be performed when an abnormality occurs in the pressure even after the cleaning is performed by increasing the exhaust gas temperature.
- the display device 180 may receive a warning signal from the control device 140 and provide it to the driver.
- the display device may be a buzzer, a speaker, a lamp, a display device, or the like.
- the display device 180 may include a plurality of display units operated as shown in Table 1 below according to the type of warning signal received from the control device 140.
- the first display unit may operate to warn the driver.
- the cleaning warning signal is received from the control unit 180
- the second display unit may operate to drive the driver. You can warn them.
- the display device 180 may include only one display unit, and may combine warning signs to be displayed through the first and second display units instead of the warning signals through the first display unit and the second display unit. Other first, second and third warnings may be displayed. In this case, the replacement warning signal and the cleaning warning signal may be classified and transmitted to the driver using a plurality of colors or sounds that can be distinguished from each other.
- the exhaust gas purification system 100 may be mounted on an exhaust pipe connected to an engine to purify the exhaust gas discharged from the engine.
- the control device 140 can automatically control the reducing agent injection amount in the reducing agent injection module 130, it can be applied to a mechanical engine that does not include an electronic control unit (ECU).
- ECU electronice control unit
- FIG. 3 is a flowchart illustrating a method for monitoring performance of an exhaust gas purification system according to exemplary embodiments.
- the concentration of nitrogen oxides in the exhaust gas is measured by using the first concentration sensor 150 and the second concentration sensor 152 installed at the front and the rear of the selective reduction catalyst device 120, respectively.
- Measure The control device 140 may receive the measured concentration information, and calculate the nitrogen oxide conversion efficiency of the selective reduction catalyst device 120 using the measured concentration information.
- the selective reduction catalyst device is abnormal by using the nitrogen oxide conversion efficiency and the differential pressure information.
- the calculated NOx conversion efficiency is compared with a predetermined efficiency (hereinafter referred to as 'setting efficiency') (S110), and the measured differential pressure is compared with a preset pressure (hereinafter referred to as 'setting pressure'). (S120, S122).
- a first warning signal is output (S130).
- the selective reduction catalyst device 120 is deteriorated to not properly perform a reducing action on nitrogen oxides.
- the driver can solve the problem by replacing the selective reduction catalyst device 120 with a new one.
- the cleaning operation may be performed by a driver by operating a pedal or a lever to increase the fuel injection amount to increase the temperature of the exhaust gas, thereby removing the impurities coupled to the selective reduction catalyst device 120 or separating the housing 110 to remove the impurities.
- the blocked portion of 120 may be cleaned, for example, mixing device 120 and carrier 122.
- cleaning of the mixing apparatus and the carrier is not shown, first, an attempt is made to remove the exhaust gas by raising the temperature, but it may be performed when it is not solved or it is not easy to raise the temperature of the exhaust gas. If the cleaning result does not change, the driver may need to inspect the exhaust gas purification system 100 such as replacing the selective reduction catalyst device 120 with a new one.
- the calculated switching efficiency is greater than the set efficiency, but when the measured differential pressure is greater than or equal to the set pressure, a third warning signal different from the first and second warning signals is output (S134).
- a third warning signal different from the first and second warning signals is output (S134).
- the driver may remove the impurities bound to the selective reduction catalyst device 120 by increasing the fuel injection amount to increase the temperature of the exhaust gas.
- the driver may also detach the housing 110 to clean the blocked portion of the selective reduction catalyst device 120, for example, the mixing device 120 and the carrier 122. Direct cleaning of the mixing device and the carrier may be performed if not shown but first attempting to remove the exhaust gas by raising the temperature, but if not resolved or raising the temperature of the exhaust gas is not acceptable.
- the warning signal may not be output.
- exhaust gas purification system 110 housing
- passage 130 reducing agent injection module
- reducing agent storage tank 134 reducing agent supply line
- control device 150 first concentration sensor
- first pressure line 164 second pressure line
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Abstract
Description
Claims (13)
- 엔진으로부터 배기가스가 배출되는 배기 파이프에 장착 가능한 하우징에 설치되고, 상기 하우징 내부로 환원제를 분사하는 환원제 분사 모듈;상기 환원제 분사 모듈 후방에 설치되고, 상기 배기가스에 포함된 질소산화물을 상기 환원제 분사 모듈에서 분사된 환원제와 촉매 반응시킴으로써 질소산화물을 환원시키기 위한 선택적 환원 촉매 장치;상기 선택적 환원 촉매 장치 전방의 압력 및 상기 선택적 환원 촉매 장치 후방의 압력 사이의 압력차를 측정하기 위한 차압 센서; 및상기 차압 센서로부터 압력 정보를 수신하고, 상기 수신된 압력이 기 설정된 압력 이하인 경우 제1 경고 신호를 출력하기 위한 제어 장치를 포함하는 배기가스 정화 시스템.
- 제 1 항에 있어서, 상기 엔진은 기계식 엔진이고, 상기 환원제 분사 모듈은 상기 엔진으로 유입되는 공기량 변화 및 배기가스의 질소산화물의 농도 변화 중 적어도 하나에 대응하는 양을 기반으로 상기 환원제의 분사량을 조절하는 것을 특징으로 하는 배기가스 정화 시스템.
- 제 1 항에 있어서, 상기 엔진으로 흡입되는 공기의 양을 측정하기 위한 공기량 센서를 더 포함하고,상기 제어 장치는 상기 공기량 센서로부터 흡입 공기량에 대한 정보를 수신하여 상기 환원제 분사 모듈의 환원제 분사량을 제어하는 것을 특징으로 하는 배기가스 정화 시스템.
- 제 1 항에 있어서, 상기 선택적 환원 촉매 장치 전방 및 후방의 상기 하우징 일측벽에 각각 설치되며, 상기 하우징 내부의 질소산화물의 농도를 측정하기 위한 제1 농도 센서 및 제2 농도 센서를 더 포함하고,상기 제어 장치는 상기 제1 및 제2 농도 센서들로부터 질소산화물의 농도 정보들을 수신하고, 상기 수신된 농도 정보들로부터 상기 선택적 환원 촉매 장치의 질소산화물 전환 효율을 계산하고, 상기 계산된 전환 효율이 기 설정된 전환 효율 이하인 경우 상기 제1 신호와 다른 제2 경고 신호를 출력하는 것을 특징으로 하는 배기가스 정화 시스템.
- 제 4 항에 있어서,상기 제어 장치는 상기 전환 효율이 기 설정된 전환 효율 이상이고, 상기 수신된 압력이 기 설정된 압력 이상인 경우 상기 제1 및 제2 경고 신호들과 다른 제3 경고 신호를 출력하는 것을 특징으로 하는 배기가스 정화 시스템.
- 제 5 항에 있어서, 상기 제1 내지 제3 경고 신호들을 운전자에게 알리기 위한 표시 장치를 더 포함하고,상기 표시 장치는,상기 전환 효율이 기 설정된 전환 효율 이하일 경우 작동하는 제1 표시부; 및상기 수신된 압력이 기 설정된 압력 이상인 경우 작동하는 제2 표시부를 포함하는 것을 특징으로 하는 배기가스 정화 시스템.
- 제 1 항에 있어서, 상기 제1 경고 신호를 운전자에게 알리기 위한 표시 장치를 더 포함하는 것을 특징으로 하는 배기가스 정화 시스템.
- 제 1 항에 있어서, 상기 환원제 분사 모듈 및 상기 선택적 환원 촉매 장치 사이에 설치되며, 상기 환원제를 배기가스와 균일하게 혼합시키기 위한 믹싱 장치를 더 포함하고,상기 차압 센서는,상기 선택적 환원 촉매 장치 전방과 연결된 제1 압력 라인 및 상기 선택적 환원 촉매 장치 후방에 연결된 제2 압력 라인과 연결되는 것을 특징으로 하는 배기가스 정화 시스템.
- 제 8 항에 있어서,상기 하우징은 상기 담체 전방측 하우징과 상기 담체가 설치된 하우징이 상호 분리 가능하게 연결되고,상기 제1 압력 라인은 상기 믹싱 장치와 상기 선택적 환원 촉매 장치 내부에 설치된 담체 사이에 연결되는 것을 특징으로 하는 배기가스 정화 시스템.
- 선택적 환원 촉매 장치 전후에서의 배기가스의 압력차 및 상기 배기가스에 포함된 질소산화물의 농도를 검출하는 단계;상기 검출된 농도 정보들로부터 상기 선택적 환원 촉매 장치의 질소산화물 전환 효율을 계산하는 단계;상기 계산된 전환 효율 및 상기 검출된 압력차로부터 상기 선택적 환원 촉매 장치의 이상 여부를 판단하는 단계; 및상기 선택적 환원 촉매 장치에 이상이 있다고 판단되면 경고신호를 출력하는 단계를 포함하는 배기가스 정화 시스템의 모니터링 방법.
- 제 10 항에 있어서, 상기 선택적 환원 촉매 장치의 이상 여부를 판단하는 단계는, 상기 계산된 전환 효율이 기 설정된 전환 효율 이하인 경우 또는 상기 측정된 압력차가 기 설정된 압력 이상인 경우 상기 선택적 환원 촉매 장치에 이상이 있는 것으로 판단하는 단계를 포함하는 것을 특징으로 하는 배기가스 정화 시스템의 모니터링 방법.
- 제 11 항에 있어서, 상기 선택적 환원 촉매 장치의 이상 여부를 판단하는 단계는, 상기 계산된 전환 효율이 기 설정된 전환 효율 이상이고 상기 측정된 압력차가 기 설정된 압력 이상인 경우 상기 선택적 환원 촉매 장치에 이상이 있는 것으로 판단하는 단계를 포함하는 것을 특징으로 하는 배기가스 정화 시스템의 모니터링 방법.
- 제 11 항에 있어서, 상기 선택적 환원 촉매 장치의 이상 여부를 판단하는 단계는, 상기 측정된 압력차가 기 설정된 압력 이상인 경우 상기 선택적 환원 촉매 장치의 일부가 막힌 것으로 판단하여 상기 선택적 환원 촉매 장치의 클리닝을 유도하는 단계를 포함하는 것을 특징으로 하는 배기가스 정화 시스템의 모니터링 방법.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201680050446.2A CN107923291B (zh) | 2015-08-28 | 2016-08-29 | 废气净化系统及其监测方法 |
| EP16842234.3A EP3339592B1 (en) | 2015-08-28 | 2016-08-29 | Exhaust gas purifying system and method for monitoring same |
| KR1020187005868A KR102002468B1 (ko) | 2015-08-28 | 2016-08-29 | 배기가스 정화 시스템 및 이의 모니터링 방법 |
| US15/756,448 US10392992B2 (en) | 2015-08-28 | 2016-08-29 | Exhaust gas cleaning system and monitoring method of the same |
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| Application Number | Priority Date | Filing Date | Title |
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| KR10-2015-0121671 | 2015-08-28 | ||
| KR20150121671 | 2015-08-28 |
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| EP (1) | EP3339592B1 (ko) |
| KR (1) | KR102002468B1 (ko) |
| CN (1) | CN107923291B (ko) |
| WO (1) | WO2017039268A1 (ko) |
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| DE112019004719T5 (de) | 2018-09-21 | 2021-06-02 | Cummins Emission Solutions Inc. | Optische Erfassung von NOx und Ammoniak in Nachbehandlungssystemen |
| CN109707489A (zh) * | 2018-12-27 | 2019-05-03 | 凯龙高科技股份有限公司 | 一种船用scr控制系统 |
| CN110052127A (zh) * | 2019-05-21 | 2019-07-26 | 陕西青朗万城环保科技有限公司 | 一种废气处理设备在线检测和节能控制的系统及方法 |
| CN110905637A (zh) * | 2019-11-28 | 2020-03-24 | 上海星融汽车科技有限公司 | Scr系统催化器工作效率实时检测提醒方法 |
| CN113447189A (zh) * | 2021-06-18 | 2021-09-28 | 中自环保科技股份有限公司 | 一种汽车尾气后处理催化单元背压测试装置和测试方法 |
| KR102585185B1 (ko) * | 2021-09-16 | 2023-10-04 | 한국중부발전(주) | 화력발전소 탈질설비의 우레아기화기 막힘 조기 감지 시스템 |
| CN115791911A (zh) * | 2022-11-28 | 2023-03-14 | 徐州芯源诚达传感科技有限公司 | 一种专用于柴油车国六尾气处理系统的双通道氮氧传感器 |
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| KR102835711B1 (ko) * | 2024-11-04 | 2025-07-25 | (주)유로사이언스 | 소성로(소각로) 연소 상태 모니터링 시스템 |
| KR102835714B1 (ko) * | 2024-11-04 | 2025-07-24 | (주)유로사이언스 | 소성로(소각로) 연소 상태 통합 관리 시스템 |
| KR102835713B1 (ko) * | 2024-11-04 | 2025-07-25 | (주)유로사이언스 | 소성로(소각로) 연소 상태 제어 시스템 |
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| CN104314652A (zh) * | 2014-08-15 | 2015-01-28 | 潍柴动力股份有限公司 | 一种scr箱损坏的检测方法和检测装置 |
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2016
- 2016-08-29 WO PCT/KR2016/009610 patent/WO2017039268A1/ko not_active Ceased
- 2016-08-29 CN CN201680050446.2A patent/CN107923291B/zh active Active
- 2016-08-29 EP EP16842234.3A patent/EP3339592B1/en active Active
- 2016-08-29 KR KR1020187005868A patent/KR102002468B1/ko active Active
- 2016-08-29 US US15/756,448 patent/US10392992B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| KR102002468B1 (ko) | 2019-07-23 |
| EP3339592B1 (en) | 2020-08-05 |
| CN107923291A (zh) | 2018-04-17 |
| KR20180029077A (ko) | 2018-03-19 |
| US10392992B2 (en) | 2019-08-27 |
| CN107923291B (zh) | 2021-05-11 |
| EP3339592A4 (en) | 2019-01-23 |
| EP3339592A1 (en) | 2018-06-27 |
| US20180266293A1 (en) | 2018-09-20 |
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