EP1921380A1 - Procédé et dispositif pour diminuer la teneur en NOx dans les fumées issues d'incinérateurs à lit fluidisé - Google Patents

Procédé et dispositif pour diminuer la teneur en NOx dans les fumées issues d'incinérateurs à lit fluidisé Download PDF

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Publication number
EP1921380A1
EP1921380A1 EP06023402A EP06023402A EP1921380A1 EP 1921380 A1 EP1921380 A1 EP 1921380A1 EP 06023402 A EP06023402 A EP 06023402A EP 06023402 A EP06023402 A EP 06023402A EP 1921380 A1 EP1921380 A1 EP 1921380A1
Authority
EP
European Patent Office
Prior art keywords
fluidized bed
waste
temperature
adding water
water
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.)
Withdrawn
Application number
EP06023402A
Other languages
German (de)
English (en)
Inventor
Axel Hellwig
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.)
Doosan Lentjes GmbH
Original Assignee
Lentjes GmbH
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 Lentjes GmbH filed Critical Lentjes GmbH
Priority to EP06023402A priority Critical patent/EP1921380A1/fr
Priority to CNA2007100858953A priority patent/CN101178180A/zh
Publication of EP1921380A1 publication Critical patent/EP1921380A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/50—Control or safety arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
    • F23L7/002—Supplying water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2207/00—Control
    • F23G2207/10—Arrangement of sensing devices
    • F23G2207/101—Arrangement of sensing devices for temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2207/00—Control
    • F23G2207/50—Cooling fluid supply

Definitions

  • the present invention relates to a method and a device for reducing the NO x content in combustion exhaust gases from waste incineration plants with fluidized bed combustion.
  • Nitrogen oxides are environmental toxins whose formation must be avoided at all costs or at least greatly reduced.
  • nitrogen oxides contribute to the formation of photochemical smog in a complex manner, whereby in a main reaction NO 2 is photolytically cleaved into NO and O radicals.
  • Nitric oxide (NO) in turn reacts with ozone to form NO 2 and O 2 .
  • the ozone concentration is reduced and the ozone layer, which serves as a UV filter in the atmosphere, damaged.
  • atmospheric NO x released with water to form nitric acid react, which can then reach the soil with precipitation and lead to acidification.
  • the legislator has therefore set limit values for the NO x values released during the thermal treatment or incineration of waste.
  • the half-hour mean NO x in flue gas must not exceed 400 mg / Nm 3 tr .
  • the total daily mean value may not exceed 200 mg / Nm 3 tr .
  • the object is achieved as regards the method by a method for reducing the NO x content in flue gases from waste incineration plants with fluidized bed, which is characterized in that the waste to be incinerated in dependence of the temperature in the fluidized layer of water is added.
  • the fluidized bed combustion in general is divided into the three zones fluidized bed, combustion zone and post-combustion zone.
  • the combustion process can take place predominantly in the region of the fluidized bed or in the region of the afterburning zone in accordance with the waste composition and the calorific value.
  • the combustion process is largely or predominantly in the area of the stationary fluidized bed, the temperature rises in the fluidized bed and the fluidized bed overheats. In this case, there is an excessive NO x emission and the resulting flue gases must be de-embroidered by means of suitable denitrification.
  • the start-up of a fluidized bed furnace is generally carried out with so-called start-up burners, which heat the air blown in to fluidize the fluidized bed.
  • the start-up burner is started up with a temperature ramp until an oven temperature of approx. 750 ° C is reached.
  • a lance burner installed in the fluidized bed area supports the starting process until a temperature> 850 ° C. is reached in the afterburning zone.
  • waste can be given up for incineration in the waste incineration plant.
  • the NO x value immediately increases to values of generally more than 800 mg / Nm 3 tr and then decreases as the bed temperature decreases.
  • the decrease to a value below the half-hour mean of 400 mg / Nm 3 tr can be up to two hours depending on the fluidized bed furnace and the abandoned waste.
  • the flue gases released during this time must be de-embroidered.
  • temperatures of up to 850 ° C. may occur in the fluidized bed.
  • the achievement of such temperatures in the fluidized bed leads to a significantly increased NO x release.
  • the addition of the water takes place at least as a function of the temperature in the fluidized bed.
  • the addition of water to the waste can be done depending on the amount of waste added.
  • existing fluidized bed ovens can also be retrofitted with the method according to the invention.
  • the invention provides an apparatus for carrying out the method according to the invention.
  • the device according to the invention comprises a device for determining the temperature in the fluidized bed, a device for adding water to the waste to be incinerated and a control device, wherein the control device is connected to the device for determining the temperature in the fluidized bed and the means for adding water so that the control device can control the device for adding water as a function of the temperature determined in the fluidized bed.
  • the device according to the invention can have a device connected to the control device for determining the amount of waste introduced into the fluidized bed, wherein the control device can control the device for adding water depending on the temperature determined in the fluidized bed and the amount of waste introduced into the fluidized bed.
  • the inventive device can be easily and inexpensively integrate into existing fluidized bed ovens.
  • Fig. 1 shows a fluidized bed furnace 1 for the combustion of waste.
  • the fluidized bed furnace 1 has a fluidized bed 2, a combustion zone 3 and a post-combustion zone 4.
  • the starting burner 5 By means of the starting burner 5, the fluidized bed can be heated during the starting process as described above.
  • the lance burner 6 serves for further temperature control of the fluidized bed and the post-combustion zone.
  • the control unit 7 is connected to the temperature sensor 8 and the waste amount determining means 10 so as to be able to control the water addition means 11 as a function of the temperature in the fluidized bed measured at the temperature sensor 8 and the amount of waste determined by means 10, that the temperature of the fluidized bed is kept below a limit temperature of 780 ° C.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Treating Waste Gases (AREA)
  • Incineration Of Waste (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
EP06023402A 2006-11-10 2006-11-10 Procédé et dispositif pour diminuer la teneur en NOx dans les fumées issues d'incinérateurs à lit fluidisé Withdrawn EP1921380A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06023402A EP1921380A1 (fr) 2006-11-10 2006-11-10 Procédé et dispositif pour diminuer la teneur en NOx dans les fumées issues d'incinérateurs à lit fluidisé
CNA2007100858953A CN101178180A (zh) 2006-11-10 2007-03-09 用于减少流化床加热中燃烧废气的NOx含量的方法及装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06023402A EP1921380A1 (fr) 2006-11-10 2006-11-10 Procédé et dispositif pour diminuer la teneur en NOx dans les fumées issues d'incinérateurs à lit fluidisé

Publications (1)

Publication Number Publication Date
EP1921380A1 true EP1921380A1 (fr) 2008-05-14

Family

ID=37908269

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06023402A Withdrawn EP1921380A1 (fr) 2006-11-10 2006-11-10 Procédé et dispositif pour diminuer la teneur en NOx dans les fumées issues d'incinérateurs à lit fluidisé

Country Status (2)

Country Link
EP (1) EP1921380A1 (fr)
CN (1) CN101178180A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6761706B2 (ja) * 2016-09-05 2020-09-30 月島機械株式会社 流動炉及びその冷却方法
JP7027498B2 (ja) * 2020-09-07 2022-03-01 月島機械株式会社 流動炉及びその冷却方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1526060A1 (de) * 1965-06-16 1970-03-19 Charbonnages De France Verfahren und Vorrichtung zur thermischen Behandlung von teilweise brennbaren Materialien
DE2121259A1 (de) * 1970-05-05 1971-11-18 Fuller Company, Catasauqua, Pa. (V.StA.) Verfahren und Reaktor zur Wärmebehandlung von Stoffen
DE3139209A1 (de) * 1980-10-15 1982-06-09 Stal-Laval Turbin AB, Finspång "verfahren zum betrieb einer kombinierten gas-dampf-turbinenanlage und anlage zur durchfuehrung des verfahrens
EP0235531A1 (fr) * 1986-01-21 1987-09-09 Ishikawajima-Harima Heavy Industries Co., Ltd. Procédé de combustion stable pour un incinérateur à lit fluidisé

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1526060A1 (de) * 1965-06-16 1970-03-19 Charbonnages De France Verfahren und Vorrichtung zur thermischen Behandlung von teilweise brennbaren Materialien
DE2121259A1 (de) * 1970-05-05 1971-11-18 Fuller Company, Catasauqua, Pa. (V.StA.) Verfahren und Reaktor zur Wärmebehandlung von Stoffen
DE3139209A1 (de) * 1980-10-15 1982-06-09 Stal-Laval Turbin AB, Finspång "verfahren zum betrieb einer kombinierten gas-dampf-turbinenanlage und anlage zur durchfuehrung des verfahrens
EP0235531A1 (fr) * 1986-01-21 1987-09-09 Ishikawajima-Harima Heavy Industries Co., Ltd. Procédé de combustion stable pour un incinérateur à lit fluidisé

Also Published As

Publication number Publication date
CN101178180A (zh) 2008-05-14

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