EP1077077A2 - Procédé de traitement thermique de matières solides - Google Patents

Procédé de traitement thermique de matières solides Download PDF

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Publication number
EP1077077A2
EP1077077A2 EP00810565A EP00810565A EP1077077A2 EP 1077077 A2 EP1077077 A2 EP 1077077A2 EP 00810565 A EP00810565 A EP 00810565A EP 00810565 A EP00810565 A EP 00810565A EP 1077077 A2 EP1077077 A2 EP 1077077A2
Authority
EP
European Patent Office
Prior art keywords
reducing agent
stage
amount
secondary air
regulated
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Withdrawn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
EP00810565A
Other languages
German (de)
English (en)
Other versions
EP1077077A3 (fr
Inventor
Hans Rüegg
Beat Stoffel
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.)
Martin GmbH fuer Umwelt und Energietechnik
Original Assignee
ABB Schweiz AG
Alstom SA
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 ABB Schweiz AG, Alstom SA filed Critical ABB Schweiz AG
Publication of EP1077077A2 publication Critical patent/EP1077077A2/fr
Publication of EP1077077A3 publication Critical patent/EP1077077A3/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Withdrawn legal-status Critical Current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
    • F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2207/00—Control
    • F23G2207/30—Oxidant supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2207/00—Control
    • F23G2207/60—Additives supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2219/00—Treatment devices
    • F23J2219/20—Non-catalytic reduction devices

Definitions

  • the invention relates to a method for the thermal treatment of solids, especially waste where the solids burned in a first stage and the first stage flue gases in an afterburner mixed with secondary air and burned with complete burnout, and the SNCR process (Selective Noncatalytic Reduction) is used, in which a reducing agent in the flue gas is injected in order to reduce nitrogen oxide contained in the flue gas.
  • SNCR process Selective Noncatalytic Reduction
  • the smoke gases generated during combustion in and above the bed show a strongly fluctuating composition and temperature in terms of location and time on.
  • the flue gases are therefore made up of secondary air or a mixture Secondary air and recirculated flue gas mixed.
  • Oxygen ensures the burnout of the gases and the escaping gases are cooled.
  • the reducing agent is injected into the combustion chamber Incinerator. There it reacts with the previously educated Nitrogen oxides to nitrogen and water vapor. This reaction is ongoing Temperature range from 700 to 1100 ° C, when using ammonia as Reducing agent preferably between 850 and 1000 ° C, being at 920 ° C Optimal lies. When using urea as a reducing agent Temperature range shifted by approximately 50 ° C to higher temperatures.
  • the reaction medium is usually distributed in the combustion chamber by means of Two-substance nozzles that are attached to the outside of the combustion chamber and Use either compressed air or water vapor as the atomizing medium.
  • the invention tries to avoid all of these disadvantages.
  • You have the task based on a process for the denitrification of the flue gases from Incinerators using the SNCR process, using a reducing agent injected into the flue gas by means of a conveying medium via an injection point will indicate which is inexpensive and with which without large procedural and apparatus expenditure a lower ammonia slip and at the same time enables lower NOx clean gas concentrations become.
  • this is the case with a method according to the preamble of Claim 1 achieved in that emerging from the first stage Flue gases first in a second stage with a gaseous one oxygen-free or low-oxygen mixture medium, preferably recirculated flue gas or water vapor, are mixed, this mixture lingered in a persistence zone for at least 0.3 s and then for complete burnout in a third stage with the secondary air is mixed, the secondary air being the reducing agent is added.
  • a gaseous one oxygen-free or low-oxygen mixture medium preferably recirculated flue gas or water vapor
  • the advantages of the invention are that on the one hand the method is very is inexpensive because there is no additional transport and injection medium for the Reducing agent is required and recirculated flue gas is almost free of charge can also be used in large quantities.
  • the reducing agent is with a large volume flow of secondary air mixed, whereby by the larger amount of gas the interference is improved. This improved Mixing leads to a significantly smaller ammonia slip. To this Low NOx pure gas concentrations are at the same time low Ammonia slip possible.
  • the amount of the reducing agent supplied depending on the flue gas temperature after the addition of the gaseous Mixing medium or after adding the secondary air to a specific Setpoint is regulated because the proportion of burnt reducing agent and the Ammonia slip depends on the reaction temperature.
  • an embodiment of the invention is based on a Waste incineration plant shown. It is only for understanding the Invention essential elements shown. For example, are not shown the kettle with funnels for dust removal and the washer in which the Flue gas desulfurization takes place. The direction of flow of the media is with Arrows.
  • the single figure schematically shows part of a waste incineration plant, in non-catalytic denitrification of the combustion gases takes place.
  • the System consists of a combustion grate 1 (first combustion stage), over which is a firebox 2 with an adjoining one persistence zone 3 according to the invention (second stage of combustion), to which an afterburning zone 4 (third stage of combustion) in which the flue gases burn out completely.
  • the solids 5 to be burned, waste in the present exemplary embodiment, are placed on the combustion grate 1 and with the supply of primary air 6 burned.
  • the amount of primary air 6 can be chosen so that the air is under or over stoichiometric, i.e. that the combustion under Oxygen deficiency or excess occurs. This creates smoke gases 7, which flow into the afterburning chamber 4. There they are with one oxygen-free or low-oxygen gaseous mixture medium 8 mixed.
  • the mixture medium 8 is a gas mixture with respect to the air reduced oxygen concentration, preferably recirculated flue gas.
  • superheated steam be used.
  • a reducing agent 11 e.g. B. ammonia
  • the reducing agent 11 there are several options for the supply of the reducing agent 11. Like in the Figure shown, it is possible for the reducing agent 11 to the secondary air flow 10 Add before dividing up into the individual nozzle positions. Another It is possible to add the reducing agent 11 to the secondary air flow 10 after the division into the individual injection positions. Of course, it is also possible to use the reducing agent 11 directly at the Add injection into the afterburner to the secondary air stream 10.
  • the reducing agent 11 in gaseous form, e.g. B. as gaseous ammonia, the secondary air 10th are added or it is in liquid form, e.g. B. as an aqueous urea or Ammonia solution, before and with a nozzle in the secondary air stream 10 atomized.
  • the reducing agent 11 can also be in solid form, for example as urea powder, and in fine particle form Secondary air 10 are metered.
  • the temperature of the flue gases 9 after the addition of the gaseous mixture medium 8 depending on the added amount of the gaseous mixture medium 8 to one certain setpoint can be regulated.
  • Another advantage is that the relatively small amount of reducing agent 11 with a large volume flow of secondary air 10 is mixed and so the Mixing this larger amount of gas into the flue gas is improved.
  • the combustion of the solids 5 can e.g. B. carried out in a fluidized bed instead of on a combustion grate 1 become.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)
  • Processing Of Solid Wastes (AREA)
  • Chimneys And Flues (AREA)
  • Incineration Of Waste (AREA)
EP00810565A 1999-08-12 2000-06-28 Procédé de traitement thermique de matières solides Withdrawn EP1077077A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19938269 1999-08-12
DE19938269A DE19938269A1 (de) 1999-08-12 1999-08-12 Verfahren zur thermischen Behandlung von Feststoffen

Publications (2)

Publication Number Publication Date
EP1077077A2 true EP1077077A2 (fr) 2001-02-21
EP1077077A3 EP1077077A3 (fr) 2001-08-29

Family

ID=7918201

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00810565A Withdrawn EP1077077A3 (fr) 1999-08-12 2000-06-28 Procédé de traitement thermique de matières solides

Country Status (6)

Country Link
EP (1) EP1077077A3 (fr)
JP (1) JP2001090920A (fr)
KR (1) KR20010021151A (fr)
DE (1) DE19938269A1 (fr)
NO (1) NO20003440L (fr)
TW (1) TW448273B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1312862A3 (fr) * 2001-11-16 2004-09-08 Ecomb Ab Optimisation de combustion
EP2505919A1 (fr) * 2011-03-29 2012-10-03 Hitachi Zosen Inova AG Procédé d'optimisation de la combustion des gaz d'échappement d'une installation de combustion par homogénéisation des gaz de fumée dessus du lit de combustion réalisée par injection des gaz de fumée
EP3193084A4 (fr) * 2014-09-12 2017-07-19 Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. Incinérateur du type à chargement mécanique
DE102024112352A1 (de) * 2024-04-10 2025-10-16 Mehldau & Steinfath Umwelttechnik Gmbh Verfahren und Vorrichtung zur Behandlung von Rauchgasen
WO2025219181A1 (fr) 2024-04-10 2025-10-23 Mehldau & Steinfath Umwelttechnik Gmbh Procédé et dispositif pour la dénitrification de gaz de fumée

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10339133B4 (de) * 2003-08-22 2005-05-12 Fisia Babcock Environment Gmbh Verfahren zur NOx-Minderung in Feuerräumen und Vorrichtung zur Durchführung des Verfahrens
US7975628B2 (en) * 2006-09-13 2011-07-12 Martin GmbH für Umwelt- und Energietechnik Method for supplying combustion gas in incineration systems
JP2013072571A (ja) * 2011-09-27 2013-04-22 Takuma Co Ltd 排ガス処理システム
JP5967809B2 (ja) * 2012-05-15 2016-08-10 株式会社タクマ 排ガス処理方法及び排ガス処理装置
JP6103957B2 (ja) * 2013-01-25 2017-03-29 日立造船株式会社 排ガス処理設備

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3943084A1 (de) * 1989-12-27 1991-07-04 Saarbergwerke Ag Verfahren zur verringerung der stickoxidemission bei der verfeuerung von festen brennstoffen
ATE133772T1 (de) * 1991-10-08 1996-02-15 Muellkraftwerk Schwandorf Betr Verfahren zur verbrennung von feststoffen
DE4237230C1 (de) * 1992-11-04 1994-03-03 Babcock Anlagen Gmbh Verfahren zum Reinigen eines Rauchgasstromes
DE4436389C2 (de) * 1994-10-12 1998-01-29 Saacke Gmbh & Co Kg Vorrichtung und Verfahren zur Reduzierung von NO¶x¶-Emissionen
DE19514135A1 (de) * 1995-04-20 1996-10-24 Babcock Babcock Lentjes Kraftw Mehrstufenverfahren zur abwasserfreien Verringerung von bei der Verbrennung fossiler schwefelhaltiger Brennstoffe gasförmig freigesetzten Luftschadstoffen
JP4087914B2 (ja) * 1996-07-25 2008-05-21 日本碍子株式会社 脱硝システム及び脱硝方法
EP0829684A1 (fr) * 1996-09-13 1998-03-18 FINMECCANICA S.p.A. AZIENDA ANSALDO Procédé et dispositif pour la réduction sélective non catalytique des émissions d'une chaufferie
KR100549654B1 (ko) * 1998-05-11 2006-02-08 마틴 게엠베하 퓌르 움벨트-운트 에네르기에테크닉 고형물을 열처리하는 방법
ES2206878T3 (es) * 1998-09-23 2004-05-16 Martin Gmbh Fur Umwelt- Und Energietechnik Procedimiento para la desnitracion de gases de la combustion.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1312862A3 (fr) * 2001-11-16 2004-09-08 Ecomb Ab Optimisation de combustion
EP2505919A1 (fr) * 2011-03-29 2012-10-03 Hitachi Zosen Inova AG Procédé d'optimisation de la combustion des gaz d'échappement d'une installation de combustion par homogénéisation des gaz de fumée dessus du lit de combustion réalisée par injection des gaz de fumée
WO2012130446A1 (fr) 2011-03-29 2012-10-04 Hitachi Zosen Inova Ag Procédé d'optimisation de la combustion totale des gaz d'échappement d'une installation de combustion
EP2691701B1 (fr) 2011-03-29 2017-08-23 Hitachi Zosen Inova AG Procédé d'optimisation de la combustion totale des gaz d'échappement d'une installation de combustion
EP2691701B2 (fr) † 2011-03-29 2024-03-20 Hitachi Zosen Inova AG Procédé d'optimisation de la combustion totale des gaz d'échappement d'une installation de combustion
EP3193084A4 (fr) * 2014-09-12 2017-07-19 Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. Incinérateur du type à chargement mécanique
US10386064B2 (en) 2014-09-12 2019-08-20 Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. Stoker-type incinerator
DE102024112352A1 (de) * 2024-04-10 2025-10-16 Mehldau & Steinfath Umwelttechnik Gmbh Verfahren und Vorrichtung zur Behandlung von Rauchgasen
WO2025219181A1 (fr) 2024-04-10 2025-10-23 Mehldau & Steinfath Umwelttechnik Gmbh Procédé et dispositif pour la dénitrification de gaz de fumée

Also Published As

Publication number Publication date
JP2001090920A (ja) 2001-04-03
NO20003440L (no) 2001-02-13
NO20003440D0 (no) 2000-07-03
EP1077077A3 (fr) 2001-08-29
DE19938269A1 (de) 2001-02-15
TW448273B (en) 2001-08-01
KR20010021151A (ko) 2001-03-15

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