EP1332316A1 - Verfahren zum befeuern eines für die öl- oder gasfeuerung ausgelegten kessels mit einem staubförmigen brennstoff - Google Patents
Verfahren zum befeuern eines für die öl- oder gasfeuerung ausgelegten kessels mit einem staubförmigen brennstoffInfo
- Publication number
- EP1332316A1 EP1332316A1 EP01993794A EP01993794A EP1332316A1 EP 1332316 A1 EP1332316 A1 EP 1332316A1 EP 01993794 A EP01993794 A EP 01993794A EP 01993794 A EP01993794 A EP 01993794A EP 1332316 A1 EP1332316 A1 EP 1332316A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- boiler
- firing
- combustion chamber
- fuel
- oil
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
- F23C1/10—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air liquid and pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
- F23C1/12—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air gaseous and pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
- F23C5/24—Disposition of burners to obtain a loop flame
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/003—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for pulverulent fuel
Definitions
- the invention relates to a method for firing a boiler designed for oil or gas firing with a dust-like fuel fluidized with the aid of air.
- Oil or gas fired water tube boilers for generating z. B. of steam are so constructed today that
- the combustion chamber is sufficient to burn out the oil or gas flame
- the temperature of the flue gases in the area of the combustion chamber outlet / superheater inlet (also called corner temperature t E ) is usually between 1,050 and 1,150 ° C.
- the dust flame requires 2 to 3 times the burnout volume compared to an oil or gas flame. If the combustion chamber volume is dimensioned for gas or oil firing, it is therefore not sufficient for the burnout of dust. With the same firing capacity as with oil or gas, the burnout of the dust would extend far into the downstream units, such as the superheater, and cause severe slagging and corrosion there.
- So the first problem is to accelerate the burnout of the dust by 100 or 200%.
- the second problem is to take measures that lower the corner temperature from 1,050 to 1,150 ° C to approx. 900 ° C.
- the invention has for its object to provide a method of the type mentioned that can be carried out without changing the existing boiler dimensions.
- the invention solves the complex task consisting of three individual problems by a single measure. This consists of replacing the previous oil or gas burners, which are positioned horizontally at the bottom of the combustion chamber, with combustors, which are arranged in the area of the combustion chamber cover or on them and fire as far down as possible so that the flame jet has the largest possible expansion volume in the combustion chamber and slag formation on combustion chamber walls is avoided.
- Combustors are to be understood as small, very heavy-duty special combustion chambers in which at least 30%, preferably 60%, of the fuel heat is converted, and which end in a flame acceleration nozzle, which generate a flame jet of at least 40 m / s, preferably 120 m / s speed , The rest of the fuel burns out in the flame jet.
- the flame jet of a combustor has such a high speed that the flue gases in the combustion chamber are set in motion by the flame jet, which in addition to the heat transfer from the flame to the combustion chamber walls by radiation also generates heat transfer by convection and thus leads to a lowering of the corner temperature ,
- the drawing shows a combustion chamber 1 delimited by water pipes O with a superheater 2 and a flue gas outlet 3. Downstream of this there are secondary heating surfaces 4. All water pipes O and heating surfaces are connected at the top to a boiler drum 5 and at the bottom to a water collector 6. In the lower area, dashed line 7 indicates where an oil or gas burner was previously flanged.
- corner temperature t E of the flue gases prevails in the area of exit from combustion chamber 1 / entry into superheater 2 and is between 1,050 and 1,150 ° C. in modern boilers.
- a combustor 8 is arranged which fires downwards from above.
- a combustor 8 consists of an arbitrarily designed combustion chamber 9, in which at least 30% of the fuel heat is converted, and a flame acceleration nozzle 10 adjoining the combustion chamber 9, which generates a flame jet 11 which has a speed of approximately 100 m / s.
- the water pipes O are heated by the flame jet 11 and the flue gases generated by the combustion.
- the combustor 8 is designed in the present case so that about 50% of the fuel heat is converted in it. The remaining 50% burn in the flame jet.
- the combustor 8 is attached to the boiler in such a way that the flame jet blown into the combustion chamber generates the fastest possible circulation of the flue gases.
- the dust-like fuel for example coal dust
- the dust-like fuel is fed to the combustor 8 in a fluidized state. It burns at least 30%, preferably 50% of the fuel at a pressure which is at least 200 Pa, preferably 1,000 Pa higher than the pressure in the combustion chamber 1.
- the burning air / fuel mixture is in the flame acceleration nozzle 10 to at least 40 m / s, preferably 100 m / s accelerated flame jet speed.
- the one from the flame beam the buoyant forces of the hot flue gases are negligible. Only the flame jet 11 determines the flow pattern in the combustion chamber 1.
- the smoke gas content of combustion chamber 1 is approx. 28 kg.
- the combustor has an impulse or jet thrust of approx. 1.66 kN, or 170 kg.
- the pulse of 170 kg is large compared to the amount of flue gas of 28 kg and thus determines the speed of the flue gases in the combustion chamber 1.
- the upward speed on the rear wall 12 of the combustion chamber is approximately 50 m / s.
- the flue gases circulate several times in the combustion chamber 1 before they leave it through the superheater 2 and the outlet 3. In this way, in addition to flame and gas radiation, heat transfer by convection is generated, the corner temperature t E of z. B. lowers 1,100 ° C to 900 ° C.
- the flue gas speed is still 30 to 40 m / s.
- the flow is thus very turbulent, whereas previously the rising flame gases only reached the superheater 2 at 6 to 10 m / s in the oil or gas burners 7.
- the air is supplied to the combustor 8 at a pressure which is above the pressure in the combustion chamber 1, at least 200 Pa, preferably 1,000 Pa above the pressure in the combustion chamber;
- the pressure drop from the combustion chamber 9 to the combustion chamber 1 is converted into speed.
- this work appears as an increase in energy, i.e. Acceleration of the flame beam. Its energy comes mainly from the combustion and only has to be applied to a small extent by the blower with which the fluidized fuel is introduced into the combustor 8. The power requirement of this air blower is hardly greater than that of a conventional oil burner.
- the combustor can fire in any direction depending on the boiler design, i.e. downwards, upwards, across or at an angle. This depends on practical considerations such as B. the achievement of the fastest possible circulation of the flue gases in the combustion chamber or the blowing out of impurities. It is important that the flame jet emerging from it has a sufficient free volume into which it can spread without hitting the boiler walls and producing an ash deposit which leads to slagging.
- the combustor is horizontal when the boiler is lying, i.e. attached essentially horizontally.
- the combustor 8 is arranged eccentrically, because this gives the greatest flue gas circulation speeds under the conditions of the example. If other conditions require, the combustor can also be arranged symmetrically to the firebox, whereby the circulation speeds become somewhat lower.
- combustors of larger dimensions perpendicular to the plane of the drawing several combustors can be arranged side by side as a battery.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10055507 | 2000-11-09 | ||
DE10055507A DE10055507A1 (de) | 2000-11-09 | 2000-11-09 | Verfahren zum Befeuern eines für die Öl- oder Gasfeuerung ausgelegten Kessels mit einem staubförmigen Brennstoff |
PCT/EP2001/012943 WO2002039018A1 (de) | 2000-11-09 | 2001-11-08 | Verfahren zum befeuern eines für die öl- oder gasfeuerung ausgelegten kessels mit einem staubförmigen brennstoff |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1332316A1 true EP1332316A1 (de) | 2003-08-06 |
EP1332316B1 EP1332316B1 (de) | 2005-03-02 |
Family
ID=7662675
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01993794A Expired - Lifetime EP1332316B1 (de) | 2000-11-09 | 2001-11-08 | Verfahren zum befeuern eines für die öl- oder gasfeuerung ausgelegten kessels mit einem staubförmigen brennstoff |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1332316B1 (de) |
DE (2) | DE10055507A1 (de) |
WO (1) | WO2002039018A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107036084A (zh) * | 2017-05-12 | 2017-08-11 | 海湾环境科技(北京)股份有限公司 | 燃气锅炉 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10232373B4 (de) | 2002-07-17 | 2009-04-02 | Schoppe, Fritz, Dr.-Ing. | Verfahren zur Erhöhung der Flammstabilität bei Kohlenstaubfeuerungen und Vorrichtung zur Ausführung des Verfahrens |
DE10301857A1 (de) | 2003-01-17 | 2004-07-29 | Schoppe, Fritz, Dr.-Ing. | Verfahren zum Befeuern eines Flammrohrkessels mit einem staubförmigen Brennstoff sowie staubgefeuerter Flammrohrkessel |
PL2202474T3 (pl) | 2008-12-23 | 2012-01-31 | SWISS KRONO Tec AG | Urządzenie do suszenia produktu z rozdrabniania drewna |
JP5986895B2 (ja) * | 2012-11-12 | 2016-09-06 | 三菱重工業株式会社 | ボイラ |
JP6995609B2 (ja) * | 2017-12-22 | 2022-01-14 | 三菱重工マリンマシナリ株式会社 | ボイラ |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL83411C (de) * | ||||
FR511506A (fr) * | 1920-03-12 | 1920-12-28 | Utilisation Des Combustibles P | Chambre de combustion pour combustibles pulvérisés sans matières volatiles |
GB993157A (en) * | 1961-03-25 | 1965-05-26 | Steinmueller Gmbh L & C | Improvements in pulverised fuel fired, slag tap furnaces |
DE2527618C2 (de) * | 1975-06-20 | 1985-09-26 | Fritz Dr.-Ing. 8026 Ebenhausen Schoppe | Verfahren und Vorrichtung zur Verbrennung von Kohlenstaub |
JPS6071812A (ja) * | 1983-09-27 | 1985-04-23 | Kawasaki Heavy Ind Ltd | 微粉燃焼用バ−ナ装置 |
US4566393A (en) * | 1984-02-15 | 1986-01-28 | Connell Ralph M | Wood-waste burner system |
-
2000
- 2000-11-09 DE DE10055507A patent/DE10055507A1/de not_active Withdrawn
-
2001
- 2001-11-08 WO PCT/EP2001/012943 patent/WO2002039018A1/de active IP Right Grant
- 2001-11-08 EP EP01993794A patent/EP1332316B1/de not_active Expired - Lifetime
- 2001-11-08 DE DE50105484T patent/DE50105484D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0239018A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107036084A (zh) * | 2017-05-12 | 2017-08-11 | 海湾环境科技(北京)股份有限公司 | 燃气锅炉 |
CN107036084B (zh) * | 2017-05-12 | 2023-07-21 | 海湾环境科技(北京)股份有限公司 | 燃气锅炉 |
Also Published As
Publication number | Publication date |
---|---|
EP1332316B1 (de) | 2005-03-02 |
DE50105484D1 (de) | 2005-04-07 |
DE10055507A1 (de) | 2002-05-23 |
WO2002039018A1 (de) | 2002-05-16 |
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