EP0692679A2 - Procédé et schéma d'installation pour le séchage et l'incinération de boues d'égout - Google Patents

Procédé et schéma d'installation pour le séchage et l'incinération de boues d'égout Download PDF

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Publication number
EP0692679A2
EP0692679A2 EP95109883A EP95109883A EP0692679A2 EP 0692679 A2 EP0692679 A2 EP 0692679A2 EP 95109883 A EP95109883 A EP 95109883A EP 95109883 A EP95109883 A EP 95109883A EP 0692679 A2 EP0692679 A2 EP 0692679A2
Authority
EP
European Patent Office
Prior art keywords
drying
sludge
combustion
cyclone separator
sewage sludge
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Withdrawn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
EP95109883A
Other languages
German (de)
English (en)
Other versions
EP0692679A3 (fr
Inventor
Klaus Hobusch
Wolfgang Epper
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.)
Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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
Priority claimed from DE19944431564 external-priority patent/DE4431564A1/de
Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0692679A2 publication Critical patent/EP0692679A2/fr
Publication of EP0692679A3 publication Critical patent/EP0692679A3/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Withdrawn legal-status Critical Current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
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/10—Drying by heat
    • F23G2201/101—Drying by heat using indirect heat transfer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/20—Dewatering by mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00—Combustion
    • F23G2202/40—Combustion in a pulsed combustion chamber

Definitions

  • the invention relates to a method and the associated technical circuit for drying and burning sewage sludge, the sewage sludge being dewatered and dried.
  • Landfilling will become more difficult for the future for two reasons. Firstly, the creation of sufficient landfill space is becoming increasingly problematic and secondly, the deposition of organic substances is being increasingly restricted after the introduction of TA municipal waste.
  • a method for drying and subsequent burning of sludge which is characterized in that the water of the sludge evaporates completely in direct or indirect use of the flue gas heat in front of the incineration point and the resulting heated dry portion of the sludge simultaneously has a fineness of dust is crushed that the dust-like dry material of the sludge is then separated from the vapors, fed to the combustion site by means of part of the combustion air and burned there with the supply of the remaining part of the combustion air, and that part of the vapors which have been freed from the dust-like dry material of the combustion point for cooling the flue gases or is supplied as combustion air.
  • the associated device is characterized in that a combined sludge drying and crushing apparatus is followed by a vapor deduster and a dust burner connected to it via a vapor branch line.
  • the dust burner is connected to the sludge drying and shredding apparatus via a flue gas line with a downstream flue gas cleaner.
  • the object of the invention is to develop a method and the associated system circuit for drying and combustion of sludge, in particular sewage sludge, in which a complete combustion of the organic with little expenditure on equipment and with reduction of energy costs and without additional pollution of the environment Harmful and odorous substances occur when the dryer circuit is separated from the combustion heating circuit.
  • the thin sludge which has been mechanically dewatered and dried mechanically in a process step known per se by means of a centrifugal dryer is metered in without pulsing a pulsating combustion
  • the organic pollutants and odorous substances of the dried sludge are almost completely burnt off at temperatures of over 850 ° C with a dwell time in the range of seconds.
  • the heat energy of the exhaust gases of the pulsating combustion produced during the combustion is supplied as indirect energy by the combined dewatering and drying stage as drying energy, while part of the drying gases is supplied to the pulsation reactor as combustion air after separation of the amount of water absorbed.
  • the advantages of the method and the device according to the invention are that complex drying and combustion of thin sludge, in particular sewage sludge, can be carried out with little expenditure on equipment. It has surprisingly been found that the material dewatered and dried in a centrifugal dryer can be fed to pulsating combustion without additional preparation. The ashes and flue gases produced during combustion meet the requirements of environmental protection, so that environmental hazards are avoided. Due to the high temperatures in the pulsation reactor, there is a complete combustion of the organic pollutants and odors with little ash that can be deposited without any problems. Heavy metals are immobilized in the ashes.
  • Another advantage of the invention is that no additional units for processing the dried sludge for subsequent combustion are required. As a result, the cost of the plant is reduced.
  • the air-technical separation of the dryer circuit from the heating circuit for the combustion of the dry material has the advantage that contamination of the steam circuit with the exhaust gases from the combustion is avoided when using the thermal energy of the pulsating combustion for drying.
  • the sewage sludge to be dried and incinerated is fed as thin sludge to a centrifugal dryer 1 known per se, in which a combined mechanical dewatering and drying of the thin sludge takes place.
  • the hot gas stream supplied via the circulating air line 15 dries the sludge to a dry matter content of approximately 60%, the dried sludge having a fine-grained structure with an average granule diameter of 1.5 mm.
  • the dried fine-grained material is discharged with the drying gases via a line 2 from the centrifugal dryer and fed to a cyclone separator 3.
  • the dry goods are separated from the vapors.
  • the dry material is metered into a pulsation reactor 13 for combustion without additional intermediate comminution via a material line 4 and a silo 10.
  • the pulsation reactor 13 consists of a conical combustion chamber with a subsequent resonance tube emerging axially from the combustion chamber.
  • the combustion chamber On the entry side, the combustion chamber is equipped with aerodynamic valves that allow the combustion air to enter periodically.
  • the incoming material-air mixture is ignited and burns explosively, whereby the pressure wave can only propagate in the direction of the resonance tube due to the inlet end.
  • the accelerating discharge of the combustion gases from the combustion chamber due to its inertia a negative pressure, so that the new mixture can occur in this period.
  • This ignites explosively by compression, flows into the resonance tube at high speed and creates a high turbulence factor in the gas flow.
  • the dry material is pulsed.
  • the organic pollutants and odors in the dried sewage sludge are almost completely burned.
  • the heavy metals in the dried sewage sludge are immobilized in the ashes.
  • the ashes produced during the pulsation combustion are separated from the hot exhaust gases.
  • the separated ash is fed via a material line 12 to an ash loading station and the hot exhaust gases to a heat exchanger 6.
  • the heat exchanger 6 there is an indirect heat exchange between the hot exhaust gases from the combustion with a part of the drying gases separated in the cyclone separator 3. These are then, as described above, fed to the centrifugal dryer 1 via the circulating air line 15. The combustion gases cooled in the heat exchanger 6 pass through an exhaust pipe 14 to the exhaust gas cleaner 8, where they are cleaned of the pollutants.
  • the other part of the drying gases separated in the cyclone separator 3 is fed to a condenser 7, in which the amount of water absorbed by the drying gases is separated from the vapors.
  • a part of the drying air freed from the condensate is fed to the pulsation reactor 13 as combustion air via the partial gas line 9.
  • the other part is given to the exhaust gas cleaner 8.
  • fresh air 16 can also be supplied to the pulsation reactor 13.
  • the fuel energy required for the combustion of the dried sludge is partly or completely supplied by the sewage sludge itself.
EP95109883A 1994-07-13 1995-06-24 Procédé et schéma d'installation pour le séchage et l'incinération de boues d'égout Withdrawn EP0692679A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4424653 1994-07-13
DE4424653 1994-07-13
DE19944431564 DE4431564A1 (de) 1994-07-13 1994-09-05 Verfahren und anlagentechnische Schaltung zur Trocknung und Verbrennung von Klärschlamm
DE4431564 1994-09-05

Publications (2)

Publication Number Publication Date
EP0692679A2 true EP0692679A2 (fr) 1996-01-17
EP0692679A3 EP0692679A3 (fr) 1997-01-02

Family

ID=25938284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95109883A Withdrawn EP0692679A3 (fr) 1994-07-13 1995-06-24 Procédé et schéma d'installation pour le séchage et l'incinération de boues d'égout

Country Status (1)

Country Link
EP (1) EP0692679A3 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1248041A2 (fr) 2001-04-04 2002-10-09 Adolfo Fernandez Mesa Procédé de destruction thermique
EP1406044A1 (fr) * 2002-10-02 2004-04-07 Norsk Inova AS Procédé et dispositif pour le traitement de déchets
EP1533279A1 (fr) * 2003-11-19 2005-05-25 Biosolidair Dispositif pour le traitement de biomasse et procédé correspondant
AT413602B (de) * 2003-08-26 2006-04-15 Andritz Ag Maschf Vorrichtung und verfahren zum trocknen einer substanz, insbesondere klärschlamm
NL1035274C2 (nl) * 2008-04-09 2009-10-12 Internationaal Projectbureau H Werkwijze alsmede inrichting voor het verwerken van organisch materiaal omvattend slib.
ITMO20090208A1 (it) * 2009-08-07 2011-02-08 Daniele Barbieri Impianto per lo smaltimento di fanghi organici e simili e relativo procedimento.
CN103982897A (zh) * 2014-03-19 2014-08-13 上海欣鼎钢结构件有限公司 一种焚烧炉系统
CN111744307A (zh) * 2019-03-27 2020-10-09 四川文德忠瑞环保科技有限公司 一种浮选钛精矿干燥烟气异味净化处理工艺
IT202100009617A1 (it) * 2021-04-16 2022-10-16 Vomm Impianti E Processi S P A Procedimento per il trattamento di fanghi contenenti sostanze chimiche inquinanti

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2330127A1 (de) 1972-07-31 1974-06-12 Von Roll Ag Verfahren zum trocknen und anschliessenden verbrennen von schlamm, sowie anlage zur ausfuehrung des verfahrens
WO1993000562A1 (fr) 1991-06-25 1993-01-07 Baumann-Schilp, Lucia Procede et dispositif de deshydratation de boues de curage
DE4217729A1 (de) 1992-05-29 1993-12-02 Dessau Zement Maschbau Gmbh Verfahren und anlagentechnische Schaltung zur Trocknung und Verbrennung von Abfallstoffen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940010659B1 (ko) * 1989-03-30 1994-10-24 켄 미야기 고함수 연소성 고체의 건조 및 연소장치
DE3928325A1 (de) * 1989-08-26 1991-02-28 Pleq Plant & Equipment Enginee Verfahren zum trocknen und/oder verbrennen von klaerschlamm

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2330127A1 (de) 1972-07-31 1974-06-12 Von Roll Ag Verfahren zum trocknen und anschliessenden verbrennen von schlamm, sowie anlage zur ausfuehrung des verfahrens
WO1993000562A1 (fr) 1991-06-25 1993-01-07 Baumann-Schilp, Lucia Procede et dispositif de deshydratation de boues de curage
DE4217729A1 (de) 1992-05-29 1993-12-02 Dessau Zement Maschbau Gmbh Verfahren und anlagentechnische Schaltung zur Trocknung und Verbrennung von Abfallstoffen

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1248041A2 (fr) 2001-04-04 2002-10-09 Adolfo Fernandez Mesa Procédé de destruction thermique
EP1406044A1 (fr) * 2002-10-02 2004-04-07 Norsk Inova AS Procédé et dispositif pour le traitement de déchets
AT413602B (de) * 2003-08-26 2006-04-15 Andritz Ag Maschf Vorrichtung und verfahren zum trocknen einer substanz, insbesondere klärschlamm
EP1533279A1 (fr) * 2003-11-19 2005-05-25 Biosolidair Dispositif pour le traitement de biomasse et procédé correspondant
BE1015743A3 (nl) * 2003-11-19 2005-08-02 Biosolidair Nv Inrichting voor het verwerken van biomassa en werkwijze daarbij toegepast.
NL1035274C2 (nl) * 2008-04-09 2009-10-12 Internationaal Projectbureau H Werkwijze alsmede inrichting voor het verwerken van organisch materiaal omvattend slib.
ITMO20090208A1 (it) * 2009-08-07 2011-02-08 Daniele Barbieri Impianto per lo smaltimento di fanghi organici e simili e relativo procedimento.
CN103982897A (zh) * 2014-03-19 2014-08-13 上海欣鼎钢结构件有限公司 一种焚烧炉系统
CN111744307A (zh) * 2019-03-27 2020-10-09 四川文德忠瑞环保科技有限公司 一种浮选钛精矿干燥烟气异味净化处理工艺
IT202100009617A1 (it) * 2021-04-16 2022-10-16 Vomm Impianti E Processi S P A Procedimento per il trattamento di fanghi contenenti sostanze chimiche inquinanti
WO2022219136A1 (fr) 2021-04-16 2022-10-20 Vomm Impianti E Processi S.P.A. Procédé et installation de traitement de boues contenant des substances chimiques polluantes

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Publication number Publication date
EP0692679A3 (fr) 1997-01-02

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