DE4408826C1 - Exhaust gas system with heat exchanger - Google Patents
Exhaust gas system with heat exchangerInfo
- Publication number
- DE4408826C1 DE4408826C1 DE4408826A DE4408826A DE4408826C1 DE 4408826 C1 DE4408826 C1 DE 4408826C1 DE 4408826 A DE4408826 A DE 4408826A DE 4408826 A DE4408826 A DE 4408826A DE 4408826 C1 DE4408826 C1 DE 4408826C1
- Authority
- DE
- Germany
- Prior art keywords
- line
- exhaust
- exhaust gas
- heat exchanger
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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
- 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 ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
-
- 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
-
- 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
- F01N3/0205—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using heat exchangers
-
- 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
-
- 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
- F01N3/025—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 fuel burner or by adding fuel to exhaust
-
- 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 ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
-
- 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 ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
- G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
-
- 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
- F01N2240/02—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 heat exchanger
-
- 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
- F01N2240/10—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 heat accumulator
-
- 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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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
Die Erfindung betrifft eine Abgasanlage mit Wärmetauscher für Motorprüf stände gemäß dem Oberbegriff des ersten Anspruchs.The invention relates to an exhaust system with a heat exchanger for engine testing stands according to the preamble of the first claim.
Aus der Offenlegungsschrift DE 39 09 932 A1 ist ein Verfahren zur Re generation eines in einer Abgasleitung einer aufgeladenen Brenn kraftmaschine stromab von deren Abgasturbolader angeordneten Rußparti kelfilters mittels Abgastemperaturerhöhung bekannt. Ein Abgashaupt strom wird in einem unteren bis mittleren Lastbereich der Brennkraft maschine am Abgasturbolader vorbeigeführt und vom mittleren Lastbe reich bis zu einer Vollast ein betriebspunktabhängig bemessener Ab gasteilstrom an dem Abgasturbolader vorbeigeführt. Die Verbrennungs prozeßtemperatur der Brennkraftmaschine kann mittels Ansaugluftvorwär mung durch einen Wärmetauscher am Abgashauptstrom angehoben werden, so daß eine für eine Regeneration des Rußpartikelfilters ausreichend hohe Temperatur des in den Rußpartikelfilter gelangenden Abgasstroms er reicht wird. Dieses bekannte Verfahren ist nicht geeignet für das Rei nigen von Rußpartikelfiltern in der Abgasleitung von Motorprüfständen, die Abgas mit niederer Temperatur emittieren, und dieses bekannte Ver fahren führt beim Betrieb der Brennkraftmaschine zu erhöhten Verbren nungsprozeßtemperaturen, die zu erhöhtem Verschleiß und zu erhöhten Anteilen einiger Schadstoffe im Abgas der Brennkraftmaschine führen. Einen Hinweis auf einen Katalysator ist diesem Stand der Technik nicht zu entnehmen.From the published patent application DE 39 09 932 A1 a method for re generation of one in an exhaust pipe of a charged burner Engine arranged soot downstream of their exhaust gas turbocharger kelfilters known by increasing the exhaust gas temperature. An exhaust head current is in a lower to medium load range of the internal combustion engine machine led past the exhaust gas turbocharger and from the medium load range up to a full load depending on the operating point partial gas flow past the exhaust gas turbocharger. The combustion process temperature of the internal combustion engine can by means of intake air preheat tion can be raised by a heat exchanger on the main exhaust gas flow that a sufficiently high for a regeneration of the soot particle filter Temperature of the exhaust gas flow entering the soot particle filter is enough. This known method is not suitable for the Rei of soot particle filters in the exhaust pipe of engine test benches, emit the low temperature exhaust gas, and this known ver driving leads to increased combustion when operating the internal combustion engine process temperatures that lead to increased wear and increased Share some pollutants in the exhaust gas of the internal combustion engine. This state of the art is not an indication of a catalyst refer to.
Aus der DE 38 03 100 A1 ist zwar ein Verfahren und eine Vorrichtung zum Regenerieren von Rußfiltern bekannt, bei dem der Abgasstrom in Teilströme aufgeteilt wird und aufgrund der gesteuerten Aufteilung die Wärmeverluste gering gehalten werden. Der mit der erfindungsgemäßen Vorrichtung erzielbare, obengenannte Vorteil, insbesondere der geringe Energieaufwand, ist mit der vorbenannten Einrichtung aber nicht erreichbar.DE 38 03 100 A1 describes a method and a device for regeneration known from soot filters, in which the exhaust gas flow is divided into partial flows and due to the controlled distribution, the heat losses are kept low. The one with the above-mentioned advantage of the device according to the invention, in particular the low energy consumption, but cannot be achieved with the aforementioned device.
Aus der DE 38 21 138 A1 ist ein Heizsystem für Fahrzeuge bekannt, bei dem unter anderem auch ein Partikelfilter für das Abgas vorgesehen ist. Bei dem bekannten Heizsystem wird den heißen Brenngasen in Wärmetauschern Wärme entzogen. Schließlich wird in der nicht vorveröffentlichten DE 43 03 626 A1 ein Verfahren zur Steuerung von Partikelfiltersystemen vorgeschlagen, bei dem der Mengenstrom von über die Partikelfilter geführten Abgasen von Dieselbrennkraftmaschinen regelbar ist. Auf die erfindungsgemäße Ausgestaltung finden sich jedoch auch in dieser Druckschrift keine Hinweise.From DE 38 21 138 A1 a heating system for vehicles is known, in which under a particle filter for the exhaust gas is also provided. With the well-known The heating system extracts heat from the hot fuel gases in heat exchangers. Finally, in DE 43 03 626 A1, which has not been previously published, describes a method for controlling particle filter systems proposed, in which the mass flow of exhaust gases passed through the particle filter of Diesel internal combustion engines is adjustable. Find on the design according to the invention However, there are no indications in this publication either.
Aufgabe der Erfindung ist es, eine Abgasanlage mit Wärmetauscher für Motorprüfstände zu schaffen, die eine zur Regeneration ausreichend hohe Temperatur des in einen Partikelfilter der Abgasanlage gelang enden Abgasstroms gewährleistet, ohne die Temperatur im Motorprüf stand zu erhöhen.The object of the invention is to provide an exhaust system with a heat exchanger To create engine test benches that are sufficient for regeneration high temperature in a particulate filter of the exhaust system guaranteed exhaust gas flow without the temperature in the engine test stand to increase.
Die Lösung der Aufgabe erfolgt erfindungsgemäß mit einer Abgasanlage mit Wärmetauscher für Motorprüfstände mit den Merkmalen des Anspruchs 1. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprü chen dargestellt.The object is achieved according to the invention with an exhaust system with heat exchanger for engine test benches with the features of the claim 1. Advantageous embodiments of the invention are in the dependent claims Chen shown.
Die erfindungsgemäße Abgasanlage mit Wärmetauscher für Motorprüfstände führt Abgase mit niederer Temperatur, z. B. einer Abgastemperatur von 55°C, durch eine Abgasleitung gereinigt der Umgebung zu. Die Tempera tur der Abgase in der Abgasleitung wird mit einem Brenner auf Be triebstemperaturen von z. B. 450°C erhöht und ein Teil der erhitzten Abgase dem Partikelfilter und dem Katalysator zugeführt. Die Abgas leitung weist mehrere Leitungsabschnitte auf. Ein erster Leitungsab schnitt führt Abgase vom Motorprüfstand einem Wärmetauscher, ein zwei ter Leitungsabschnitt die im Wärmetauscher erhitzten Abgase einem Brenner, und ein dritter Leitungsabschnitt die im Brenner erhitzten Abgase wiederum dem Wärmetauscher zu. Die Abgase, die in den Partikel filter und einen Reaktor mit den Katalysatoren gelangen, werden ge reinigt, wobei die hohe Abgastemperatur die Selbstregeneration des Partikelfilters unterstützt und der Reaktor rasch auf Betriebstempera tur gebracht oder auf Betriebstemperatur gehalten wird. Die erfindungs gemäße Anordnung des Wärmetauschers in der Abgasleitung reduziert die erforderliche Energie, um den Partikelfilter zu regenerieren und den Reaktor auf Betriebstemperatur zu bringen oder zu halten, und führt daher zu kostengünstigem Betrieb der Abgasanlage bei reduziertem Wartungsaufwand.The exhaust system according to the invention with a heat exchanger for engine test benches leads exhaust gases with low temperature, e.g. B. an exhaust gas temperature of 55 ° C, cleaned by an exhaust pipe to the environment. The tempera The flue gas in the flue pipe is set to a burner with operating temperatures of z. B. 450 ° C and part of the heated Exhaust gases are fed to the particle filter and the catalyst. The exhaust Line has several line sections. A first line of management Cut leads exhaust gases from the engine test bench to a heat exchanger, one two ter line section the exhaust gases heated in the heat exchanger Burner, and a third line section that heated in the burner Exhaust gases in turn to the heat exchanger. The exhaust gases that are in the particles filter and get a reactor with the catalysts are ge cleans, the high exhaust gas temperature the self-regeneration of the Particle filter supports and the reactor quickly to operating temperature brought or kept at operating temperature. The fiction appropriate arrangement of the heat exchanger in the exhaust pipe reduced the energy required to regenerate the particle filter and bring or maintain the reactor at operating temperature, and therefore leads to low-cost operation of the exhaust system with reduced Maintenance effort.
Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist zwischen Partikelfilter und Reaktor ein Wärmespeicher und eine Ammoniakzufuhr angeordnet. Der Wärmespeicher hält die Abgase innerhalb eines Tempera turbereichs, in dem das zugeführte Ammoniak im selektiv wirkenden Ka talysator, der im Reaktor untergebracht ist, einen Teil der Schad stoffe im Abgas deutlich reduziert. Vorzugsweise werden weitere Schad stoffe im Abgas durch einen ebenfalls im Reaktor enthaltenen Oxida tionskatalysator deutlich vermindert.According to an advantageous embodiment of the invention, between Particulate filter and reactor, a heat accumulator and an ammonia supply arranged. The heat storage keeps the exhaust gases within a tempera ture range in which the ammonia supplied in the selective Ka Talysator, which is housed in the reactor, part of the damage substances in the exhaust gas significantly reduced. Preferably further harm substances in the exhaust gas through an oxide also contained in the reactor tion catalyst significantly reduced.
Zur Optimierung des Volumens der Abgase, die durch die Leitung mit dem Partikelfilter und den Reaktor fließen, ist gemäß der Erfindung die Abgasleitung mit Drosseln, die vorzugsweise verstellbar sind, und die Leitung mit dem Partikelfilter und dem Reaktor mit einem Um wälzventilator versehen.To optimize the volume of the exhaust gases through the line with the Particulate filter and the reactor flow is the according to the invention Exhaust line with throttles, which are preferably adjustable, and Line with the particle filter and the reactor with a Um Rolling fan provided.
Die Erfindung wird im folgenden anhand eines Ausführungsbeispiels dar gestellt. Es zeigt:The invention is illustrated below using an exemplary embodiment posed. It shows:
Fig. 1 einen Schaltplan der Anlage mit Wärmetauscher. Fig. 1 is a circuit diagram of the system with a heat exchanger.
Fig. 1: Ein Motorprüfstand 1, insbesondere ein Prüfstand für Diesel motoren, ist an einen ersten Leitungsabschnitt 2 einer Abgasleitung angeschlossen. Der erste Leitungsabschnitt 2 der Abgasleitung führt vom Motorprüfstand 1 zu einem Wärmetauscher 3. Ein zweiter Leitungsab schnitt 2b der Abgasleitung führt die Abgase vom Wärmetauscher 3 über verstellbaren Drosseln 4, 5 zu einem Brenner 6. Ein dritter Leitungs abschnitt 2a der Abgasleitung führt die Abgase vom Brenner 6 wiederum zu dem Wärmetauscher 3 bevor das Abgas durch einen Auslaß 13 der Umge bung zugeführt wird. Fig. 1: An engine test bench 1 , in particular a test bench for diesel engines, is connected to a first line section 2 of an exhaust pipe. The first line section 2 of the exhaust line leads from the engine test bench 1 to a heat exchanger 3 . A second line section 2 b of the exhaust line leads the exhaust gases from the heat exchanger 3 via adjustable throttles 4 , 5 to a burner 6 . A third line section 2 a of the exhaust line leads the exhaust gases from the burner 6 in turn to the heat exchanger 3 before the exhaust gas is supplied to the environment through an outlet 13 .
Eine Leitung 7 zweigt von dem dritten Leitungsabschnit 2a der Abgas leitung ab und mündet in einen Dieselpartikelfilter 8. In der Leitung 7 sind nach dem Dieselpartikelfilter 8 ein Wärmespeicher 9, ein Um wälzventilator 10 eine Düse 11 für die Zufuhr von Ammoniak, und ein Reaktor 12 mit Katalysatoren in der Leitung hintereinander angeordnet. Die Leitung 7 mündet zwischen der Drossel 4 und der Drossel 5 in den zweiten Leitungsabschnitt 2b der Abgasleitung.A line 7 branches off from the third line section 2 a of the exhaust gas line and opens into a diesel particle filter 8 . In the line 7 after the diesel particulate filter 8, a heat accumulator 9 , a circulation fan 10, a nozzle 11 for the supply of ammonia, and a reactor 12 with catalysts in the line are arranged one behind the other. The line 7 opens between the throttle 4 and the throttle 5 in the second line section 2 b of the exhaust pipe.
Ein Auslaß 13 führt die Abgase vom Wärmetauscher 3 ab. An outlet 13 leads the exhaust gases from the heat exchanger 3 .
Der Betrieb der Abgasanlage wird nachfolgend beschrieben. Abgas von Motoren vermischt mit Luft wird aus dem Motorprüfstand 1, mit einer Temperatur von beispielsweise ca. 55° dem ersten Leitungsab schnitt 2 der Abgasleitung zugeführt. Das Abgas wird durch den Wärme tauscher 3 geleitet und mit erhöhter Temperatur durch den zweiten Lei tungsabschnitt 2b der Abgasleitung über die verstellbaren, Drosseln 4, 5 in den Brenner 6 geleitet. Im Brenner 6 wird die Temperatur des Ab gases auf ca. 450°C erhöht.The operation of the exhaust system is described below. Exhaust gas from engines mixed with air is fed from the engine test bench 1 , with a temperature of, for example, approximately 55 ° to the first line section 2 of the exhaust line. The exhaust gas is passed through the heat exchanger 3 and passed at an elevated temperature through the second line section 2 b of the exhaust line via the adjustable throttles 4 , 5 into the burner 6 . In the burner 6 , the temperature of the gas is increased from about 450 ° C.
Das erhitzte Abgas strömt vom dritten Leitungsabschnitt 2a der Abgas leitung entweder in die Leitung 7 oder wiederum zum Wärmetauscher 3. Im Wärmetauscher 3 gibt das erhitzte Abgas Wärme an das Abgas im er sten Leitungsabschnitt 2 der Abgasleitung ab, so daß, wie oben gesagt, die Temperatur des Abgases im zweiten Leitungsabschnitt 2b der Abgas leitung erhöht wird.The heated exhaust gas flows from the third line section 2 a of the exhaust gas line either into line 7 or again to heat exchanger 3 . In the heat exchanger 3 , the heated exhaust gas gives off heat to the exhaust gas in the first line section 2 of the exhaust line, so that, as stated above, the temperature of the exhaust gas in the second line section 2 b of the exhaust line is increased.
Die Stellung der Drosseln 4, 5 steuert das Abgasvolumen, das durch die
Leitung 7 fließt. Der Dieselpartikelfilter 8 in der Leitung 7 wird von
den Abgasen mit der Temperatur von 450°C beaufschlagt, so daß er sich
im Betrieb regeneriert. Der Wärmespeicher 9 stromabwärts des Diesel
partikelfilters 8 hält das Abgas in der Leitung 7 in einem engen
Temperaturbereich, in dem das Abgas im selektiv wirkenden Katalysa
tor mit Ammoniak reagieren kann. Der Umwalzventilator 10 steuert das
Abgasvolumen in der Leitung 7. Die Düse 11 führt dem Abgas in der Lei
tung 7 Ammoniak zu, das im selektiv wirkenden Katalysator mit Schad
stoffanteilen im Abgas reagiert und einen Teil der Schadstoffe im Ab-
gas reduziert. Die an der Düse 11 mit Ammoniak angereicherten Abgase
münden in den Reaktor mit Katalysatoren 12, der das Abgas katalytisch reduziert
und oxidiert. Die Abgase mit der Temperatur von ca. 450°C bringen
oder halten den Reaktor mit Katalysatoren 12 auf Betriebstemperatur. Die Leitung 7
mündet nach dem Reaktor mit Katalysatoren 12 und zwischen den Drosseln 4 und 5 in den
zweiten Leitungsabschnitt 2b der Abgasleitung und das gereinigte
Abgas aus Leitung 7 wird über Brenner 6 und dritten Leitungsabschnitt 2a der
Abgasleitung dem Wärmetauscher 3 zugeführt.
The position of the throttles 4 , 5 controls the volume of exhaust gas flowing through the line 7 . The diesel particulate filter 8 in line 7 is subjected to a temperature of 450 ° C. by the exhaust gases, so that it regenerates during operation. The heat accumulator 9 downstream of the diesel particulate filter 8 keeps the exhaust gas in line 7 in a narrow temperature range in which the exhaust gas can react with ammonia in the selectively acting catalyst. The circulating fan 10 controls the exhaust gas volume in the line 7 . The nozzle 11 feeds the exhaust gas in the line 7 to ammonia, which reacts in the selective catalyst with pollutant components in the exhaust gas and some of the pollutants in the exhaust gas.
gas reduced. The exhaust gases enriched with ammonia at the nozzle 11 open into the reactor with catalysts 12 , which catalytically reduces and oxidizes the exhaust gas. The exhaust gases with the temperature of about 450 ° C bring or keep the reactor with catalysts 12 to operating temperature. The line 7 opens after the reactor with catalysts 12 and between the throttles 4 and 5 in the second line section 2 b of the exhaust line and the cleaned exhaust gas from line 7 is fed to the heat exchanger 3 via burner 6 and third line section 2 a of the exhaust line.
Das im Wärmetauscher 3 auf ca. 55°C abgekühlte Abgas der Abgasleitung wird über einen Auslaß 13 der Umgebung zugeführt.The exhaust gas of the exhaust pipe, which has cooled to about 55 ° C. in the heat exchanger 3 , is supplied to the environment via an outlet 13 .
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4408826A DE4408826C1 (en) | 1994-03-16 | 1994-03-16 | Exhaust gas system with heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4408826A DE4408826C1 (en) | 1994-03-16 | 1994-03-16 | Exhaust gas system with heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE4408826C1 true DE4408826C1 (en) | 1995-05-24 |
Family
ID=6512881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE4408826A Expired - Fee Related DE4408826C1 (en) | 1994-03-16 | 1994-03-16 | Exhaust gas system with heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE4408826C1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1469173A1 (en) * | 2003-04-16 | 2004-10-20 | Arvin Technologies, Inc. | An exhaust emission reduction system |
| WO2004111399A1 (en) * | 2003-06-18 | 2004-12-23 | Volvo Lastvagnar Ab | Apparatus for adjusting the temperature of exhaust gases |
| FR2948410A3 (en) * | 2009-07-27 | 2011-01-28 | Renault Sa | Particle filter regeneration device for test bench to test operation of components of internal combustion engine, has injection device injecting air toward upstream of filter to regenerate filter irrespective of operating point of engine |
| WO2012024211A1 (en) * | 2010-08-19 | 2012-02-23 | Dow Global Technologies Llc. | Method and devices for heating urea-containing materials in vehicle emission control system |
| US20180142595A1 (en) * | 2016-11-21 | 2018-05-24 | Clean Train Propulsion | Internal Combustion Engine Aftertreatment Heating Loop |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3821138A1 (en) * | 1987-09-03 | 1989-03-16 | Man Technologie Gmbh | Heating system for vehicles |
| DE3803100A1 (en) * | 1988-02-03 | 1989-08-17 | Gillet Heinrich Gmbh | Method and device for the regeneration of soot filters |
| DE3909932A1 (en) * | 1989-03-25 | 1990-09-27 | Daimler Benz Ag | METHOD FOR REGENERATING A PARTICLE FILTER ARRANGED IN THE EXHAUST PIPE OF A CHARGED COMBUSTION ENGINE |
| DE4303626A1 (en) * | 1993-02-09 | 1994-08-11 | Kloeckner Humboldt Deutz Ag | Method for the control of particle filter systems |
-
1994
- 1994-03-16 DE DE4408826A patent/DE4408826C1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3821138A1 (en) * | 1987-09-03 | 1989-03-16 | Man Technologie Gmbh | Heating system for vehicles |
| DE3803100A1 (en) * | 1988-02-03 | 1989-08-17 | Gillet Heinrich Gmbh | Method and device for the regeneration of soot filters |
| DE3909932A1 (en) * | 1989-03-25 | 1990-09-27 | Daimler Benz Ag | METHOD FOR REGENERATING A PARTICLE FILTER ARRANGED IN THE EXHAUST PIPE OF A CHARGED COMBUSTION ENGINE |
| DE4303626A1 (en) * | 1993-02-09 | 1994-08-11 | Kloeckner Humboldt Deutz Ag | Method for the control of particle filter systems |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1469173A1 (en) * | 2003-04-16 | 2004-10-20 | Arvin Technologies, Inc. | An exhaust emission reduction system |
| US6871489B2 (en) | 2003-04-16 | 2005-03-29 | Arvin Technologies, Inc. | Thermal management of exhaust systems |
| WO2004111399A1 (en) * | 2003-06-18 | 2004-12-23 | Volvo Lastvagnar Ab | Apparatus for adjusting the temperature of exhaust gases |
| FR2948410A3 (en) * | 2009-07-27 | 2011-01-28 | Renault Sa | Particle filter regeneration device for test bench to test operation of components of internal combustion engine, has injection device injecting air toward upstream of filter to regenerate filter irrespective of operating point of engine |
| WO2012024211A1 (en) * | 2010-08-19 | 2012-02-23 | Dow Global Technologies Llc. | Method and devices for heating urea-containing materials in vehicle emission control system |
| US20180142595A1 (en) * | 2016-11-21 | 2018-05-24 | Clean Train Propulsion | Internal Combustion Engine Aftertreatment Heating Loop |
| CN110268144A (en) * | 2016-11-21 | 2019-09-20 | 清洁列车推进公司 | Internal combustion engine post-processes heating circuit |
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