WO2001055570A1 - Combustion method and combustion apparatus - Google Patents
Combustion method and combustion apparatus Download PDFInfo
- Publication number
- WO2001055570A1 WO2001055570A1 PCT/NL2001/000031 NL0100031W WO0155570A1 WO 2001055570 A1 WO2001055570 A1 WO 2001055570A1 NL 0100031 W NL0100031 W NL 0100031W WO 0155570 A1 WO0155570 A1 WO 0155570A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- combustion
- inlet
- fuel
- combustion gases
- combustion chamber
- 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.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
- F02B47/04—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being other than water or steam only
- F02B47/08—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being other than water or steam only the substances including exhaust gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
- F02B47/04—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being other than water or steam only
- F02B47/06—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being other than water or steam only the substances including non-airborne oxygen
-
- 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 invention relates to a combustion method wherein a fuel and atmospheric air are introduced into a combustion chamber, wherein said fuel is combusted in said combustion chamber,, wherein combustion gases that are released during combustion are discharged from the combustion chamber, and wherein part of the combustion gases is returned to the combustion chamber.
- Such a method is known. It is for example used in power stations, process furnaces, larger heating boilers, gas engines and in vehicles fitted with a combustion engine.
- the combustion gases are partly returned to the combustion chamber so as to prevent the production of nitrogen oxides (NO ) and to reduce the amount of harmful substances such as carbon monoxide (CO) and hydrocarbons (C ⁇ H ) by passing them through the combustion process once again. Said substances are thereby converted into less harmful substances.
- the percentage of combustion gases that can be returned is limited, however. When the oxygen content in the combustion chamber becomes too low, this will have an adverse effect on the process. Frequently additional measures are required in order to meet the requirements for reduction of harmful emissions, such as fitting filters, catalytic converters, injection of ammonia, etc .
- another oxygen- containing gas besides atmospheric air is introduced into the combustion chamber.
- said oxygen- containing contains at least 90% oxygen.
- the oxygen content of the oxygen-containing gas being carried to the combustion chamber and the combustion gases jointly is about 20% by volume, as in atmospheric air, or substantially equal to the percentage by volume of oxygen that is required for that process, the adverse effects of returning the combustion gases for the combustion process are limited, and a larger portion of the combustion gases can be returned.
- the invention is in particular suitable for combustion processes wherein the fuel comprises coal, brown coal, coke, fuel oil, natural gas, diesel oil, petrol and/or PG.
- the fuel comprises coal, brown coal, coke, fuel oil, natural gas, diesel oil, petrol and/or PG.
- the method is used in a power station, wherein electricity is generated by means of the combustion process.
- the method is used in a process furnace, wherein a material is heated or dried by means of the combustion process.
- the method is used is a gas engine .
- the method is used for driving a vehicle.
- the method is used in a heating boiler, wherein a space is heated by means of the combustion process.
- the invention furthermore relates to a combustion apparatus, such as a power station, a process furnace, a gas engine, a vehicle or a heating boiler, comprising a combustion chamber, to which a inlet for a fuel, an inlet for atmospheric air, an exhaust for combustion gases and an inlet for combustion gases are connected, wherein the exhaust for combustion gases is connected to the inlet for combustion gases, and wherein besides the inlet for atmospheric air another inlet for another oxygen-containing gas is connected to said combustion chamber.
- a combustion apparatus such as a power station, a process furnace, a gas engine, a vehicle or a heating boiler, comprising a combustion chamber, to which a inlet for a fuel, an inlet for atmospheric air, an exhaust for combustion gases and an inlet for combustion gases are connected, wherein the exhaust for combustion gases is connected to the inlet for combustion gases, and wherein besides the inlet for atmospheric air another inlet for another oxygen-containing gas is connected to said combustion chamber.
- Figure 1 schematically shows a combustion engine comprising a combustion gas return line and an oxygen supply line.
- Figure 2 schematically shows a combustion furnace comprising a combustion gas return line and an oxygen supply line.
- a fuel inlet 2 and an inlet 3 for oxygen-containing gas are connected to an internal combustion engine in a known manner, as well as an exhaust 4 for combustion gases being produced during the combustion process in said engine 1.
- Engine 1 which comprises one or more combustion chambers, for example in the form of cylinders, can be used for driving a vehicle, for example.
- part of the combustion gases is returned to inlet 3 via return line 5, and the remaining part of the combustion gases exits the system via exhaust 6.
- the amount of combustion gases being returned can be adjusted in order to have the engine operate as efficiently as possible.
- an inlet 7 for atmospheric air and an inlet 8 for oxygen are connected to inlet 3.
- Oxygen inlet 8 adds practically pure oxygen to the gas mixture consisting of atmospheric air and combustion gases, in such a manner that the oxygen content of the gas picture that is introduced into engine 1 through inlet 3 is sufficient to ensure adequate combustion of the f el.
- an inlet 10 for fuel and air is connected to the combustion chamber of a furnace 9, as is an exhaust 4 for the combustion gases being produced in furnace 9.
- part of the combustion gases is returned to the inlet 10 of the furnace via return line 5; the remaining part exits the system via chimney 11.
- a pump 12 is fitted in the return line 5 for regulating the amount of combustion gases to be returned.
- a pump 13 which pumps the combustion gases as well as atmospheric air to the inlet 10 of the furnace via inlet 7.
- a fuel inlet 2 and an inlet 8 for oxygen are connected to inlet 10, as a result of which an optimum mixture can be introduced into the furnace 9 in a similar manner as in Figure 1.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
A combustion method and combustion apparatus, for example a power station, a process furnace, a gas engine, a vehicle or a heating boiler, wherein a fuel and atmospheric air are introduced into a combustion chamber, wherein said fuel is combusted in said cc, wherein combustion gases that are released during combustion are discharged from the cc, and wherein part of the combustion gases is returned to the combustion chamber, and wherein another oxygen-containing gas besides atmospheric air is introduced into the combustion chamber.
Description
COMBUSTION METHOD AND COMBUSTION APPARATUS
The invention relates to a combustion method wherein a fuel and atmospheric air are introduced into a combustion chamber, wherein said fuel is combusted in said combustion chamber,, wherein combustion gases that are released during combustion are discharged from the combustion chamber, and wherein part of the combustion gases is returned to the combustion chamber.
Such a method is known. It is for example used in power stations, process furnaces, larger heating boilers, gas engines and in vehicles fitted with a combustion engine. The combustion gases are partly returned to the combustion chamber so as to prevent the production of nitrogen oxides (NO ) and to reduce the amount of harmful substances such as carbon monoxide (CO) and hydrocarbons (CχH ) by passing them through the combustion process once again. Said substances are thereby converted into less harmful substances. The percentage of combustion gases that can be returned is limited, however. When the oxygen content in the combustion chamber becomes too low, this will have an adverse effect on the process. Frequently additional measures are required in order to meet the requirements for reduction of harmful emissions, such as fitting filters, catalytic converters, injection of ammonia, etc .
It is an object of the invention to provide a combustion process wherein the emission of nitrogen oxides, carbon monoxide, hydrocarbons and other harmful substances is reduced in an efficient manner, wherein a larger percentage of the combustion gases can be returned to the combustion chamber. Another object is to reuse a larger part of the heat from the combustion gases in an efficient manner.
In order to accomplish that objective, another oxygen- containing gas besides atmospheric air is introduced into the combustion chamber. Preferably, said oxygen- containing contains at least 90% oxygen. If the oxygen content of the oxygen-containing gas being carried to the combustion chamber and the combustion gases jointly is about 20% by volume, as in atmospheric air, or substantially equal to the percentage by volume of oxygen that is required for that process, the adverse effects of returning the combustion gases for the combustion process are limited, and a larger portion of the combustion gases can be returned.
The invention is in particular suitable for combustion processes wherein the fuel comprises coal, brown coal, coke, fuel oil, natural gas, diesel oil, petrol and/or PG. Experiments have shown that an NO reduction of 40% is possible when 10% of the combustion gases are returned, whilst an NO reduction of 80% is possible when 25% of the combustion gases are returned.
In one preferred embodiment the method is used in a power station, wherein electricity is generated by means of the combustion process.
In another preferred embodiment the method is used in a process furnace, wherein a material is heated or dried by means of the combustion process.
In another preferred embodiment the method is used is a gas engine .
In yet another preferred embodiment the method is used for driving a vehicle.
In yet another preferred embodiment the method is used in a heating boiler, wherein a space is heated by means
of the combustion process.
The invention furthermore relates to a combustion apparatus, such as a power station, a process furnace, a gas engine, a vehicle or a heating boiler, comprising a combustion chamber, to which a inlet for a fuel, an inlet for atmospheric air, an exhaust for combustion gases and an inlet for combustion gases are connected, wherein the exhaust for combustion gases is connected to the inlet for combustion gases, and wherein besides the inlet for atmospheric air another inlet for another oxygen-containing gas is connected to said combustion chamber.
The invention will now be explained in more detail by means of an exemplary embodiment, with reference being made to the drawings, wherein like parts are numbered alike, and wherein:
Figure 1 schematically shows a combustion engine comprising a combustion gas return line and an oxygen supply line.
Figure 2 schematically shows a combustion furnace comprising a combustion gas return line and an oxygen supply line.
According to Figure 1, a fuel inlet 2 and an inlet 3 for oxygen-containing gas are connected to an internal combustion engine in a known manner, as well as an exhaust 4 for combustion gases being produced during the combustion process in said engine 1. Engine 1, which comprises one or more combustion chambers, for example in the form of cylinders, can be used for driving a vehicle, for example. In order to reduce the emission of harmful substances such as NOx, CO and CxHy and any-* dust particles, part of the combustion gases is returned to
inlet 3 via return line 5, and the remaining part of the combustion gases exits the system via exhaust 6. The amount of combustion gases being returned can be adjusted in order to have the engine operate as efficiently as possible. Furthermore, an inlet 7 for atmospheric air and an inlet 8 for oxygen are connected to inlet 3. Oxygen inlet 8 adds practically pure oxygen to the gas mixture consisting of atmospheric air and combustion gases, in such a manner that the oxygen content of the gas picture that is introduced into engine 1 through inlet 3 is sufficient to ensure adequate combustion of the f el.
In Figure 2, an inlet 10 for fuel and air is connected to the combustion chamber of a furnace 9, as is an exhaust 4 for the combustion gases being produced in furnace 9. Similarly to Figure 1, part of the combustion gases is returned to the inlet 10 of the furnace via return line 5; the remaining part exits the system via chimney 11. A pump 12 is fitted in the return line 5 for regulating the amount of combustion gases to be returned. Furthermore incorporated in the system is a pump 13, which pumps the combustion gases as well as atmospheric air to the inlet 10 of the furnace via inlet 7. Furthermore a fuel inlet 2 and an inlet 8 for oxygen are connected to inlet 10, as a result of which an optimum mixture can be introduced into the furnace 9 in a similar manner as in Figure 1.
Although only a few possible applications of the invention are described in the exemplary embodiments, the invention can be of benefit in a great many other combustion processes. Furthermore many variations to the above-described embodiments are possible.
Claims
1. A combustion method wherein a fuel and atmospheric air are introduced into a combustion chamber, wherein said fuel is combusted in said cc, wherein combustion gases that are released during combustion are discharged from the cc, and wherein part of the combustion gases is returned to the combustion chamber, characterized in that another oxygen-containing gas besides atmospheric air is introduced into the combustion chamber.
2. A method according to claim 1, characterized in that said oxygen-containing contains at least 90% oxygen.
3. - A method according to claim 1 or 2 , characterized in that said fuel comprises coal, brown coal, coke, fuel oil, natural gas, diesel oil, petrol and/or LPG.
4. A method according to claim 1, 2 or 3 , characterized in that electricity is generated by means of the combustion process.
A method according to claim 1, 2 or 3 , characterized in that a process furnace is heated by means of the combustion process for heating or drying a material .
A method according to claim 1, 2 or 3 , characterized in that a vehicle is driven by means of the combustion process.
7. A method according to claim 1, 2 or 3 , characterized in that a space is heated by means of the combustion process.
8. Combustion apparatus, such as a power station, a process furnace, a gas engine, a vehicle or a heating boiler, comprising a combustion chamber, to which a inlet for a fuel, an inlet for atmospheric air, an exhaust for combustion gases and an inlet for combustion gases are connected, wherein the exhaust for combustion gases is connected to the inlet for combustion gases, characterized in that besides the inlet for atmospheric air another inlet for another oxygen-containing gas is connected to said combustion chamber.
9. Apparatus according to claim 8, characterized in that said apparatus is a power station.
10. Apparatus according to claim 8, characterized in that said apparatus is a process f rnace.
11. Apparatus according to claim 8, characterized in that said apparatus is a gas engine.
12. Apparatus according to claim 8, characterized in that said apparatus is a vehicle.
13. Apparatus according to claim 8, characterized in that said apparatus is a heating boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2001234229A AU2001234229A1 (en) | 2000-01-27 | 2001-01-17 | Combustion method and combustion apparatus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1014198 | 2000-01-27 | ||
| NL1014198A NL1014198C2 (en) | 2000-01-27 | 2000-01-27 | Combustion process and combustion device. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001055570A1 true WO2001055570A1 (en) | 2001-08-02 |
Family
ID=19770675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/NL2001/000031 Ceased WO2001055570A1 (en) | 2000-01-27 | 2001-01-17 | Combustion method and combustion apparatus |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU2001234229A1 (en) |
| NL (1) | NL1014198C2 (en) |
| WO (1) | WO2001055570A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2383450A1 (en) * | 2010-04-29 | 2011-11-02 | Messer Group GmbH | Method for operating a combustion engine and combustion engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3851632A (en) * | 1972-09-11 | 1974-12-03 | Agency Ind Science Techn | Method for controlling noxious components of exhaust gas from diesel engine |
| US3980064A (en) * | 1972-04-03 | 1976-09-14 | Nissan Motor Co., Ltd. | Internal combustion engine |
| DE3007522A1 (en) * | 1980-02-28 | 1981-09-10 | Wolfgang 8900 Augsburg Ulmer | Combustion improvement for IC engine, gas turbine or firing system - has e.g. hydrogen peroxide injected into combustion air and/or chamber |
| GB2301865A (en) * | 1995-06-08 | 1996-12-18 | Cdss Ltd | Treatment of recirculated exhaust gases |
-
2000
- 2000-01-27 NL NL1014198A patent/NL1014198C2/en not_active IP Right Cessation
-
2001
- 2001-01-17 WO PCT/NL2001/000031 patent/WO2001055570A1/en not_active Ceased
- 2001-01-17 AU AU2001234229A patent/AU2001234229A1/en not_active Abandoned
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3980064A (en) * | 1972-04-03 | 1976-09-14 | Nissan Motor Co., Ltd. | Internal combustion engine |
| US3851632A (en) * | 1972-09-11 | 1974-12-03 | Agency Ind Science Techn | Method for controlling noxious components of exhaust gas from diesel engine |
| DE3007522A1 (en) * | 1980-02-28 | 1981-09-10 | Wolfgang 8900 Augsburg Ulmer | Combustion improvement for IC engine, gas turbine or firing system - has e.g. hydrogen peroxide injected into combustion air and/or chamber |
| GB2301865A (en) * | 1995-06-08 | 1996-12-18 | Cdss Ltd | Treatment of recirculated exhaust gases |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2383450A1 (en) * | 2010-04-29 | 2011-11-02 | Messer Group GmbH | Method for operating a combustion engine and combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| NL1014198C2 (en) | 2001-07-30 |
| AU2001234229A1 (en) | 2001-08-07 |
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