GB2192141A - Combustion of solid fuels - Google Patents

Combustion of solid fuels Download PDF

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Publication number
GB2192141A
GB2192141A GB08712015A GB8712015A GB2192141A GB 2192141 A GB2192141 A GB 2192141A GB 08712015 A GB08712015 A GB 08712015A GB 8712015 A GB8712015 A GB 8712015A GB 2192141 A GB2192141 A GB 2192141A
Authority
GB
United Kingdom
Prior art keywords
combustion
pulverized
fuel
fluidized
zone
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
Application number
GB08712015A
Other versions
GB8712015D0 (en
GB2192141B (en
Inventor
Jerzy Tomeczek
Henryk Palugniok
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Politechnika Slaska im Wincentego Pstrowskiego
Original Assignee
Politechnika Slaska im Wincentego Pstrowskiego
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Politechnika Slaska im Wincentego Pstrowskiego filed Critical Politechnika Slaska im Wincentego Pstrowskiego
Publication of GB8712015D0 publication Critical patent/GB8712015D0/en
Publication of GB2192141A publication Critical patent/GB2192141A/en
Application granted granted Critical
Publication of GB2192141B publication Critical patent/GB2192141B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/002—Fluidised bed combustion apparatus for pulverulent solid 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 
    • 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
    • F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
    • F23C6/047—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure with fuel supply in stages
    • 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 
    • F23C2201/00—Staged combustion
    • F23C2201/30—Staged fuel supply
    • F23C2201/301—Staged fuel supply with different fuels in stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)

Description

1 1313 2 192 141 A 1 SPECIFICATION represented in the accompanying
drawing, in which the sole Figure shows schematically a Method for combustion of solid fuels, particularly fluidized-pulverized- fuel furnace.
char Coarse-grain fuel is delivered tothefluiclized bed 70 zone by means of afeeder4.
The present invention relatesto a method of Fine-grain fuel isfedthrough jet pulverized-fuel combustion of solid fuels. The invention is burners 1 into the space above the fluidized bed particularly suitable forthe combustion of char. zone.
Pulverized -fuel fired furnaces and fluidized bed The pulverized-fuel flame is located in a zone 3 ata furnaces for solid fuel combustion are already 75 small distance abovethe fluidized bed zone 2, so that known. Pulverized-fuel fired furnaces are used for it has a stabilizing effect on combustion of the the combustion of grains sized up to 100 - 200 lLm. pulverized-fuel.
Fluidized bed furnaces are used for combustion of Airfor combustion is delivered through an air larger grains. In the case of combustion of a wide distributor unit 5 and through air nozzles in the variety of grain sizes in a fluidized furnace, there is a 80 pulverized- fuel burners 1.
necessity for recycling the entrained undersize

Claims (5)

  1. particle fines. This has driven the Lurgi Co. to design CLAIMS a recycling
    fluidized bed furnace forsolid fuels.
    A basic problem occurring in the coal processing 1. A method of combustion of solid fuels technology is the combustion of the char produced 85 comprising a coarse fraction and a fine fraction, in devolatizing reactors. The obtained char has a wherein the coarse fraction is burnt in a fluidized wide spectrum of grain sizes and, during the process zone and thefine fraction is burnt in a pulverized-fuel of coal devolatizing, grains below 100 pm are flame zone located a small distance above said separated from larger grains. The fine-grain fraction fluidized zone, and wherein the two combustion is suitable for combustion in pulverized-fuel fired 90 zones interact thermally with one another.
    furnaces and coarse-grain fraction for combustion in
  2. 2. A method according to claim 1, wherein the fluidized bed furnaces. thermal interaction between the combustion zones Combustion of the coarse-g rain fraction in flu idized is such that the fluidized bed combustion zone acts bed furnaces does not cause any problems. as a stabil izer for the pu Iverized fuel f lame.
    However, combustion of the fine-grain fraction in 95
  3. 3. A method according to claim 1 or 2, wherein pulverized-fuel fired furnaces causes difficulties due combustion air is introduced both through a to a small content of volatile parts in 4% char. distributor into the fluidized zone and through Moreover,the construction of two separate units pulverized fuel burners opening into the pulverized increases the investment and exploitation costs of fuel combustion zone.
    coal processing. 100
  4. 4. A method according to anyone of the It is an aim of the invention to burn both fractions preceding claims wherein the solid fuel is char.
    in one fluidized-pulverized-fuel furnace.
  5. 5. A method of combustion of solid fuels Accordingly the present invention provides a substantially as hereinbefore described with method of combustion of solid fuels comprising a reference to the accompanying drawing.
    coarse fraction and a fine fraction, wherein the coarse fraction is burnt in a fluidized zone and the finefraction is burnt in a pulverized-fuel flame zone located a small distance above said fluidized zone, Printed for Her Majesty's Stationery Office by Croydon Printing Company (UK) Ltd, 11/87, D8991685.
    and wherein the two combustion zones interact Published byThe Patent Office, 25 Southampton Buildings, London,WC2A 1AY, thermally with one another. from which copies maybe obtained.
    The high temperature (850C) fluidized zone acts as a stabilizer to the fine fraction flame. This method of combustion ensures burning out of volatile parts more completely than in fluidized furnaces and results in a lower content of CO in the flue gas, due to the presence ofthe flame zone over the high temperature zone. At the same time the flame has a lower temperature than in atraditional pulverized fuel furnace, causing a loweremission ofnitric oxides.
    In the method ofthe invention, two methods of combustion have been connected in one fluidized-pulverized furnace in such a waythatthe lowerfluidized bed furnace forthe coarsefraction has a thermal effect on the pulverized-fuel flame zone. In the fluidized-pulverized-fuel furnace the air needed for combustion is delivered through a distributor below the fluidized zone and also through jet pulverized-fuel burners.
    One embodiment ofthe present invention is
GB8712015A 1986-07-04 1987-05-21 Method for combustion of solid fuels, particularly char Expired - Fee Related GB2192141B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL26049986 1986-07-04

Publications (3)

Publication Number Publication Date
GB8712015D0 GB8712015D0 (en) 1987-06-24
GB2192141A true GB2192141A (en) 1988-01-06
GB2192141B GB2192141B (en) 1990-03-28

Family

ID=20031864

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8712015A Expired - Fee Related GB2192141B (en) 1986-07-04 1987-05-21 Method for combustion of solid fuels, particularly char

Country Status (2)

Country Link
DE (1) DE3716990A1 (en)
GB (1) GB2192141B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0363812A2 (en) * 1988-10-10 1990-04-18 Hannover-Braunschweigische Strom-Versorgungs-Aktiengesellschaft Method and installation for generating steam, especially in heat power plants
US5014651A (en) * 1988-08-25 1991-05-14 D.U.T. Pty. Ltd. Method and apparatus for improving utilization of fuel values of as-mined coal in pulverized fuel-fired boilers
GR900100878A (en) * 1990-01-08 1992-06-25 Evt En Und Verfahrens Gmbh Method for reducing nitrogen oxides in carbon powder combustion places
WO2002093074A1 (en) * 2001-05-11 2002-11-21 Kvaerner Power Oy Combined fluidized bed and pulverized coal combustion method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014651A (en) * 1988-08-25 1991-05-14 D.U.T. Pty. Ltd. Method and apparatus for improving utilization of fuel values of as-mined coal in pulverized fuel-fired boilers
EP0363812A2 (en) * 1988-10-10 1990-04-18 Hannover-Braunschweigische Strom-Versorgungs-Aktiengesellschaft Method and installation for generating steam, especially in heat power plants
EP0363812A3 (en) * 1988-10-10 1991-02-27 Hannover-Braunschweigische Strom-Versorgungs-Aktiengesellschaft Method and installation for generating steam, especially in heat power plants
GR900100878A (en) * 1990-01-08 1992-06-25 Evt En Und Verfahrens Gmbh Method for reducing nitrogen oxides in carbon powder combustion places
WO2002093074A1 (en) * 2001-05-11 2002-11-21 Kvaerner Power Oy Combined fluidized bed and pulverized coal combustion method
US7004089B2 (en) 2001-05-11 2006-02-28 Kvaerner Power Oy Combined fluidized bed and pulverized coal combustion method

Also Published As

Publication number Publication date
GB8712015D0 (en) 1987-06-24
DE3716990A1 (en) 1988-01-14
GB2192141B (en) 1990-03-28

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920521