EP0134040A1 - Verfahren zum Zuführen von pulverförmigem Material in einem Kesselfeuerraum und Vorrichtung zum Durchführen dieses Verfahrens - Google Patents
Verfahren zum Zuführen von pulverförmigem Material in einem Kesselfeuerraum und Vorrichtung zum Durchführen dieses Verfahrens Download PDFInfo
- Publication number
- EP0134040A1 EP0134040A1 EP84110063A EP84110063A EP0134040A1 EP 0134040 A1 EP0134040 A1 EP 0134040A1 EP 84110063 A EP84110063 A EP 84110063A EP 84110063 A EP84110063 A EP 84110063A EP 0134040 A1 EP0134040 A1 EP 0134040A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- hearth
- pulverulent material
- hot
- suspending
- 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
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J7/00—Arrangement of devices for supplying chemicals to fire
Definitions
- the present invention relates to a method for injecting a pulverulent material into a furnace of a fossil solid fuel boiler, in which the pulverulent material is suspended in a gas and then introduced into the furnace. It also extends to a device for implementing this method.
- the object of the present invention is to provide a method of injecting a pulverulent material into a boiler hearth which ensures better contact between the grains of pulverulent material and the combustion gases, and consequently improves the efficiency of the injection of pulverulent material, and in particular the percentage reduction in the sulfur dioxide and sulfuric anhydride contents in the flue gases at the outlet of the boiler in the case where the pulverulent material is an oxide or an alkaline earth or alkali metal salt capable of fixing these anhydrides to form a sulfate. It also aims to allow the injection of large quantities of pulverulent material and to ensure good dispersion of the latter in the hearth without significantly disturbing the operation of the boiler.
- the method according to the invention is characterized in that the pulverulent material is suspended in a low flow of gas, which is introduced into the hearth at low speed, and in that it is introduced into the hearth around or slightly below the suspending gas a much higher flow rate of hot air or auxiliary hot gas at higher speed.
- the injection points in the hearth are chosen so that the residence time of the pulverulent material in the hearth between its injection level and the level where the temperature of the fumes is reduced to 800 ° C. is sufficient for the pulverulent material react chemically.
- the invention further extends to a device for injecting pulverulent material into a hearth of a solid fuel boiler.
- fossil characterized in that it comprises at least one nozzle for injecting into the hearth of pulverulent material suspended in a low flow of gas, and at least one nozzle for injecting a higher flow of hot air or hot gas around or a little below the nozzle for injecting the carrier gas of the pulverulent material, at a higher flow rate than this carrier gas.
- the invention applies to boilers with solid fossil fuel, coal or lignite, whether these are introduced into the boiler in the pulverized state, in the granular state, on a grid or possibly using projectors, or are suspended there in a fluid bed.
- the pulverulent material can be an alkaline earth or alkaline oxide, or an alkaline earth or alkali metal salt, for example quicklime or slaked lime, limestone, magnesia, dolomite, its effect then being to react on sulfurous and sulfuric anhydrides formed during the combustion of solid fuel by forming a solid sulfate, and thereby reducing the content of the fumes in these anhydrides.
- an alkaline earth or alkaline oxide or an alkaline earth or alkali metal salt, for example quicklime or slaked lime, limestone, magnesia, dolomite, its effect then being to react on sulfurous and sulfuric anhydrides formed during the combustion of solid fuel by forming a solid sulfate, and thereby reducing the content of the fumes in these anhydrides.
- it can also be a material intended to modify the fusibility of the ashes, or more generally to influence the chemical reactions occurring in the hearth.
- Figure 1 shows in vertical section an injection nozzle for cold air charged with lime surrounded by an annular nozzle for injecting hot air.
- FIG. 2 schematically represents in vertical section the levels of injection of cold air charged with lime, hot air for keeping the lime in suspension and combustion air in the furnace of the boiler.
- FIG. 3 shows in horizontal section a possible arrangement of the nozzles for injecting cold air loaded with lime into the boiler.
- the cold air charged with lime in a metering device arrives via the nozzle 1 which opens into the wall 2 of the fireplace 3. This air could be replaced by hot air or by recycled smoke.
- the nozzle 1 is surrounded by the annular nozzle 4 of hot air, at a temperature of 250 ° to 320 ° C, taken from the combustion air circuit, the flow of which is adjustable by the flap 5.
- the annular vein d hot air surrounding the cold air stream loaded with lime ensures a distribution of lime throughout the cross section of the hearth, and in particular prevents the grains of lime from going down the hearth along its wall.
- the level 11 of the lime injectors in the cold air corresponds to a maximum smoke temperature of 1350 ° C.
- the height H separating this level from that of the steam superheaters 6, where the maximum temperature of the fumes is approximately 800 ° C., is such that the residence time of the lime particles in the boiler between these two levels is approximately 2 seconds, which allows them to react to a large extent with sulfurous and sulfuric anhydrides, without however being brought to a too high temperature which would cause their surface fusion and a decrease in their reactivity.
- the hot air to keep the lime in suspension enters the pipe at level 15, a little below the lime injection level.
- the pulverized charcoal burners are located at levels 12, 13 and 14, notably below the lime and hot air injectors.
- Figure 3 shows the arrangement of the lime injectors 11A, 11B, 11C, 11D in horizontal cross section, in the corners of the hearth.
- the injectors could be arranged on two opposite faces of the hearth (for example front face and rear face) in the case of a hearth with frontal heating.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Glass Compositions (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84110063T ATE34210T1 (de) | 1983-08-26 | 1984-08-23 | Verfahren zum zufuehren von pulverfoermigem material in einem kesselfeuerraum und vorrichtung zum durchfuehren dieses verfahrens. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8313779A FR2551184B1 (fr) | 1983-08-26 | 1983-08-26 | Procede d'injection d'un materiau pulverulent dans un foyer de chaudiere, et dispositif de mise en oeuvre de ce procede |
FR8313779 | 1983-08-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0134040A1 true EP0134040A1 (de) | 1985-03-13 |
EP0134040B1 EP0134040B1 (de) | 1988-05-11 |
Family
ID=9291833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84110063A Expired EP0134040B1 (de) | 1983-08-26 | 1984-08-23 | Verfahren zum Zuführen von pulverförmigem Material in einem Kesselfeuerraum und Vorrichtung zum Durchführen dieses Verfahrens |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0134040B1 (de) |
AT (1) | ATE34210T1 (de) |
DE (1) | DE3471151D1 (de) |
FR (1) | FR2551184B1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2583305A1 (fr) * | 1985-06-18 | 1986-12-19 | Fives Cail Babcock | Procede de desulfuration des gaz provenant du foyer d'une chaudiere et installation pour la mise en oeuvre de ce procede. |
FR2583304A1 (fr) * | 1985-06-18 | 1986-12-19 | Fives Cail Babcock | Installation pour la desulfuration des gaz provenant du foyer d'une chaudiere. |
EP0253324A2 (de) * | 1986-07-14 | 1988-01-20 | Inland Steel Company | Verfahren und Vorrichtung, um Schwefeldioxyd in Rauchgasen zu reduzieren |
US5027723A (en) * | 1986-07-14 | 1991-07-02 | Inland Steel Company | Method and apparatus for reducing sulfur dioxide content in flue gases |
US5048431A (en) * | 1986-07-14 | 1991-09-17 | Inland Steel Company | Method and apparatus for reducing sulfur dioxide content in flue gases |
US5246364A (en) * | 1986-07-14 | 1993-09-21 | Inland Steel Company | Method and apparatus for reducing sulfur dioxide content in flue gases |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
HU200361B (en) * | 1987-12-28 | 1990-05-28 | Gyoergy Vamos | Composition and process for reducing slagging of boiler furnaces and sulfur emission |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1601959A1 (de) * | 1968-03-09 | 1970-08-27 | Hugo Senft | Vorrichtung zur Zugabe von rauchseitig Korrosionen verhindernden Staeuben zu Feuerungen |
US3746498A (en) * | 1972-01-24 | 1973-07-17 | Combustion Eng | Reducing no{11 {11 emissions by additive injection |
FR2349368A1 (fr) * | 1976-04-26 | 1977-11-25 | Charbonnages De France | Procede et dispositif d'introduction et de dispersion d'une matiere boueuse dans une enceinte |
DE3133321A1 (de) * | 1980-09-05 | 1982-04-08 | Österreichische Draukraftwerke AG, 9020 Klagenfurt | "verfahren zur entschwefelung von kohlegefeuerten kraftwerken" |
-
1983
- 1983-08-26 FR FR8313779A patent/FR2551184B1/fr not_active Expired
-
1984
- 1984-08-23 DE DE8484110063T patent/DE3471151D1/de not_active Expired
- 1984-08-23 AT AT84110063T patent/ATE34210T1/de not_active IP Right Cessation
- 1984-08-23 EP EP84110063A patent/EP0134040B1/de not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1601959A1 (de) * | 1968-03-09 | 1970-08-27 | Hugo Senft | Vorrichtung zur Zugabe von rauchseitig Korrosionen verhindernden Staeuben zu Feuerungen |
US3746498A (en) * | 1972-01-24 | 1973-07-17 | Combustion Eng | Reducing no{11 {11 emissions by additive injection |
FR2349368A1 (fr) * | 1976-04-26 | 1977-11-25 | Charbonnages De France | Procede et dispositif d'introduction et de dispersion d'une matiere boueuse dans une enceinte |
DE3133321A1 (de) * | 1980-09-05 | 1982-04-08 | Österreichische Draukraftwerke AG, 9020 Klagenfurt | "verfahren zur entschwefelung von kohlegefeuerten kraftwerken" |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2583305A1 (fr) * | 1985-06-18 | 1986-12-19 | Fives Cail Babcock | Procede de desulfuration des gaz provenant du foyer d'une chaudiere et installation pour la mise en oeuvre de ce procede. |
FR2583304A1 (fr) * | 1985-06-18 | 1986-12-19 | Fives Cail Babcock | Installation pour la desulfuration des gaz provenant du foyer d'une chaudiere. |
EP0253324A2 (de) * | 1986-07-14 | 1988-01-20 | Inland Steel Company | Verfahren und Vorrichtung, um Schwefeldioxyd in Rauchgasen zu reduzieren |
EP0253324A3 (en) * | 1986-07-14 | 1988-05-18 | Inland Steel Company | Method and apparatus for reducing sulphur dioxide content in flue gases |
AU603366B2 (en) * | 1986-07-14 | 1990-11-15 | Inland Steel Company | Method and apparatus for reducing sulfur dioxide content in flue gases |
US5027723A (en) * | 1986-07-14 | 1991-07-02 | Inland Steel Company | Method and apparatus for reducing sulfur dioxide content in flue gases |
US5048431A (en) * | 1986-07-14 | 1991-09-17 | Inland Steel Company | Method and apparatus for reducing sulfur dioxide content in flue gases |
EP0461678A1 (de) * | 1986-07-14 | 1991-12-18 | Inland Steel Company | Verfahren und Vorrichtung um Schwefeldioxid auf Rauchgas zu reduzieren |
US5246364A (en) * | 1986-07-14 | 1993-09-21 | Inland Steel Company | Method and apparatus for reducing sulfur dioxide content in flue gases |
Also Published As
Publication number | Publication date |
---|---|
FR2551184B1 (fr) | 1985-10-11 |
ATE34210T1 (de) | 1988-05-15 |
EP0134040B1 (de) | 1988-05-11 |
DE3471151D1 (en) | 1988-06-16 |
FR2551184A1 (fr) | 1985-03-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2001265303B2 (en) | Low nitrogen oxides emissions using three stages of fuel oxidation and in-situ furnace flue gas recirculation | |
JP2967394B2 (ja) | 炭素質燃料の脱硫 | |
FR2551532A1 (fr) | Procede pour reduire les emissions de nox lors de la combustion de combustibles contenant de l'azote | |
EP0134040B1 (de) | Verfahren zum Zuführen von pulverförmigem Material in einem Kesselfeuerraum und Vorrichtung zum Durchführen dieses Verfahrens | |
US20060150677A1 (en) | Reducing corrosion and particulate emission in glassmelting furnaces | |
RU2379237C1 (ru) | Сжигание твердого топлива для промышленного плавления со шлакообразующей топкой | |
FR2566098A1 (fr) | Appareil de combustion a scories fondues | |
US4232615A (en) | Coal burning method to reduce particulate and sulfur emissions | |
SU1342431A3 (ru) | Горелка дл сжигани гранулированного топлива | |
US1061469A (en) | Method of treating pulverulent substances. | |
CN206768041U (zh) | 一种节能型生物质固体燃料燃气发生炉装置 | |
US2881719A (en) | Cyclone furnace | |
JPH01195225A (ja) | 製鉄原料の溶解方法 | |
KR930005289B1 (ko) | 재가 클링커의 형태로 집괴되면서 연소가 이루어지는 화실로부터 나오는 가스의 탈황방법 및 장치. | |
CA2036642C (en) | Method of retaining sulfur in ash during coal combustion | |
US2883972A (en) | Furnace construction | |
WO1984004577A1 (fr) | Procede et foyer de chaudiere pour desulfurer les gaz combustibles | |
SU958773A1 (ru) | Способ сжигани бурых углей умеренной влажности в топках с твердым шлакоудалением | |
EP0073793A1 (de) | Einblasen von sehr heissen reduktionsgasen in einen hochofen | |
RU2147103C1 (ru) | Способ ступенчатой газификации и сжигания твердого топлива в аэрошлаковом расплаве | |
SU511359A1 (ru) | Плавильно-электоротехнологический агрегат дл фьюминговани шлаков | |
SU1333954A1 (ru) | Топка котла | |
SU1408175A1 (ru) | Отражательна печь дл плавки лома и отходов цветных металлов | |
RU2100696C1 (ru) | Низкоэмиссионная топка | |
CN2595809Y (zh) | 燃煤气化炉 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI NL SE |
|
17P | Request for examination filed |
Effective date: 19850827 |
|
17Q | First examination report despatched |
Effective date: 19860404 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE FR GB IT LI NL SE |
|
REF | Corresponds to: |
Ref document number: 34210 Country of ref document: AT Date of ref document: 19880515 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 3471151 Country of ref document: DE Date of ref document: 19880616 |
|
ITF | It: translation for a ep patent filed |
Owner name: JACOBACCI & PERANI S.P.A. |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
26 | Opposition filed |
Opponent name: DEUTSCHE BABCOCK AKTIENGESELLSCHAFT Effective date: 19890210 |
|
NLR1 | Nl: opposition has been filed with the epo |
Opponent name: DEUTSCHE BABCOCK AG |
|
PLBN | Opposition rejected |
Free format text: ORIGINAL CODE: 0009273 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: OPPOSITION REJECTED |
|
27O | Opposition rejected |
Effective date: 19900317 |
|
NLR2 | Nl: decision of opposition | ||
ITTA | It: last paid annual fee | ||
EAL | Se: european patent in force in sweden |
Ref document number: 84110063.9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19990713 Year of fee payment: 16 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19990719 Year of fee payment: 16 Ref country code: CH Payment date: 19990719 Year of fee payment: 16 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 19990720 Year of fee payment: 16 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19990722 Year of fee payment: 16 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19990723 Year of fee payment: 16 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19990818 Year of fee payment: 16 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20000801 Year of fee payment: 17 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000823 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000823 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000824 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000831 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000831 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000831 |
|
BERE | Be: lapsed |
Owner name: HOUILLERES DE BASSIN DU CENTRE ET DU MIDI ETABLIS Effective date: 20000831 Owner name: STEIN INDUSTRIE Effective date: 20000831 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010301 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20000823 |
|
EUG | Se: european patent has lapsed |
Ref document number: 84110063.9 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20010301 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010501 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020430 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |