EP0870985A2 - Procédé d'incinération des déchets dans un lit fluidisé circulant - Google Patents

Procédé d'incinération des déchets dans un lit fluidisé circulant Download PDF

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Publication number
EP0870985A2
EP0870985A2 EP98101663A EP98101663A EP0870985A2 EP 0870985 A2 EP0870985 A2 EP 0870985A2 EP 98101663 A EP98101663 A EP 98101663A EP 98101663 A EP98101663 A EP 98101663A EP 0870985 A2 EP0870985 A2 EP 0870985A2
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
mixer
waste
solids
gas
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Withdrawn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
EP98101663A
Other languages
German (de)
English (en)
Other versions
EP0870985A3 (fr
Inventor
Johannes Dr. Loeffler
Jochim Eschenburg
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.)
GEA Group AG
Original Assignee
Metallgesellschaft 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
Application filed by Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of EP0870985A2 publication Critical patent/EP0870985A2/fr
Publication of EP0870985A3 publication Critical patent/EP0870985A3/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Withdrawn legal-status Critical Current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
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
    • 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
    • F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
    • F23G5/0276—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage using direct heating
    • 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 
    • F23C2206/00—Fluidised bed combustion
    • F23C2206/10—Circulating fluidised bed
    • F23C2206/103—Cooling recirculating particles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/30—Pyrolysing
    • F23G2201/302—Treating pyrosolids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/30—Pyrolysing
    • F23G2201/303—Burning pyrogases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/30—Pyrolysing
    • F23G2201/304—Burning pyrosolids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2203/00—Furnace arrangements
    • F23G2203/50—Fluidised bed furnace
    • F23G2203/501—Fluidised bed furnace with external recirculation of entrained bed material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/10—Liquid waste
    • F23G2209/102—Waste oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/12—Sludge, slurries or mixtures of liquids

Definitions

  • the invention relates to a method for burning Waste materials in the circulating fluidized bed.
  • waste materials it can z. B. such municipal or of industrial origin, can also be liquid Waste, e.g. B. waste oil or sludge, e.g. B. sewage sludge, are processed.
  • liquid Waste e.g. B. waste oil or sludge, e.g. B. sewage sludge
  • US Pat. No. 5,425,317 describes the gasification of waste materials in the circulating fluidized bed, producing a gas containing combustible constituents which is combusted together with ash.
  • the combustion of coal in the circulating fluidized bed is known from US Pat. No. 5,159,886.
  • the hot ash formed is mixed with a portion of the granular coal to produce carbonization gas.
  • the carbonization gas is mixed with the flue gas from the coal combustion, whereby the temperature of the flue gas is increased in order to destroy N 2 O.
  • the invention is based, at the beginning mentioned processes also waste materials with a relatively large To be able to process piece size. At the same time, it should be possible be, formed or released pollutants in a gas stream to be enriched separately. According to the invention the task is thereby solved that you have a vortex combustion chamber containing oxygen Fluidizing gas feeds from the top of the Vortex combustion chamber using a hot gas-solid mixture Subtracts temperatures in the range of 800 to 1400 ° C and one The separator feeds that the mixture is called hot in the separator Solids separated and at least a part of the separated Solids in an outside of the vortex combustion chamber Mixer feeds that waste materials are fed to the mixer and they are mixed with the hot solids fed, whereby a solid mixture and pyrolysis gas are formed, and that at least a part of the solid mixture in the Vortex combustion chamber conducts and draws off the pyrolysis gas.
  • All the waste materials can be fed to the mixer, it is but also possible to give only a part of it to the mixer and Z. B. directly up to 50 wt .-% of the total waste direct the vortex combustion chamber.
  • they are Waste by mixing with the hot solid heated and thereby swollen.
  • the emerging smoldering or Pyrolysis gases are mixed gases and vapors, in this Pyrolysis gas pollutants are enriched. In this way can be ensured that at least part of the Pollutants do not get into the vortex combustion chamber, where they otherwise could cause corrosion.
  • the mixer can be designed in various ways, z. B. a drum mixer, one Rotary tube mixer, a deck oven, a screw mixer or trade a paddle mixer, you can also hot and cold here Solid streams trickling down and penetrating mix.
  • the temperatures of the formed in the mixer Solid mixtures are usually in the range of 150 to 650 ° C.
  • the pyrolysis gas to burn at least partially. Especially if that Pyrolysis gas is low in pollutants, you can at least partly lead into the vortex combustion chamber.
  • the mixer makes it possible to make it relatively coarse Add waste materials that are used for direct feeding into the Vortex combustion chambers are not suitable. Due to the smoldering in Mixer also creates a crushing effect, that's why can at least the waste materials fed to the mixer 1% by weight of waste materials with piece sizes of at least 20 mm consist. A higher proportion of this relatively coarse waste is easily possible.
  • the solid mixture formed in the mixer is a proportion of contains relatively coarse solids, which is used for feeding in the vortex combustion chamber is less suitable, it is recommended these coarse solids e.g. B. separated by sieving. A such a separation can also be useful if you have one Part of the incombustible components of the solid mixture want to remove the task into the vortex combustion chamber. Alternatively or in addition it is possible to coarse solids with the Remove bottom ash from the vortex combustion chamber.
  • the vortex combustion chamber (1) of FIG. 1 has a grate (2) in the lower area and a gas distribution chamber (3) underneath.
  • Oxygen-containing fluidizing gas is passed to the chamber (3) z. B. in the form of air or O 2 -enriched air through line (4). Ash can be drawn down through the channel (5).
  • the combustion in the fluidized bed takes place in the fluidized bed combustion chamber at temperatures in the range of 800 to 1400 ° C.
  • the too Processing waste materials are in the line (7) introduced and first in the mixer (8) with hot solids mixed, which are introduced in line (9a).
  • a solid mixture is formed, which with Temperatures in the range of 150 to 650 ° C and preferably at least 200 ° C through the line (10) into the combustion chamber (1) is fed.
  • By combustion in the chamber (1) creates a hot gas-solid mixture, which by the Channel (12) gets into the separator (13).
  • a first part of the Solids get back into the line (9b) Vortex combustion chamber (1), passing through line (9c) beforehand can still remove part of the process.
  • the remaining Solids are removed through line (9a), as already explained, abandoned the mixer (8).
  • the pyrolysis gas formed in the mixer (8) by the smoldering of the waste materials is drawn off in the line (15) and enters a combustion chamber (16), which is supplied with an oxygen-containing gas (air, air enriched with O 2 or through the line (17) technically pure oxygen).
  • a combustion gas with temperatures of 800 to 1500 ° C leaves the combustion chamber (16) through line (18) and is mixed with the hot gas, which leaves the separator (13) in line (14).
  • the further treatment of the gases is first carried out in a waste heat boiler (19), with flying dust being separated, which is drawn off in the line (19a). Chilled gases are fed through line (20) to gas cleaning (30).
  • the combustion gas of line (18) can be passed through a separate waste heat boiler, which is not shown in the drawing.
  • FIG. 1 It is possible to all of the arrangement of FIG. 1 processing waste through line (7) into the mixer (8) feed. Part of the waste to be processed can also be drawn directly through the dashed line Line (7a) in the vortex combustion chamber (1) are given. If one through the line (7a) together with waste or without this ground limestone or cement clinker Combustion chamber (1) supplies, you can generate an ash that for further processing in the building materials or cement industry suitable is.
  • FIG. 1 2 are the same reference numerals for those parts of the plant chosen, their meaning already together is explained with Fig. 1.
  • 2 one gives a part of the are called solids coming from line (9) through the Line (9d) on a known vortex cooler (21).
  • Vortex air is fed through line (22) and fed heated air through the line (22 a) into the combustion chamber (1) a.
  • cooling elements (23) are produced in through indirect heat exchange water vapor. Chilled solids get through the line (9b) at least partially into the Chamber (1).
  • the vortex cooler (21) is not only used for production of water vapor, rather the temperature can also be the chamber (1) are regulated. If necessary, e.g. B. the Walls of the vortex chamber (1) be provided with cooling elements, what but not in the drawing for better clarity is shown. If necessary, secondary air can be passed through the Feed line (4a).
  • the mixer (8) of FIG. 2 is fed through line (7) processing waste, which is called by mixing with Solids from the line (9a) are swelled.
  • educationed Pyrolysis gas can, if it is relatively low in pollutants, by Line (15a) are passed into the chamber (1). That in the Line (10) withdrawn from the mixer (8) solid mixture first reaches a sieve (25), whereby a coarse Fraction obtained, which is withdrawn through line (26). Of the Fine part of the solids is through the line (27) of the chamber (1) abandoned.
  • the Solid fraction of the line (26) z. B. by magnetic separation divided into a combustible and a non-combustible part the combustible substances into the chamber (1) or returns the mixer (8).
  • the process variant of FIG. 1 can also be modified so that one part or all of it Pyrolysis gas from the line (15) directly into the chamber (1) directs.
  • the method of FIG. 2 can also be modified in such a way that that the pyrolysis gas formed in the mixer (8) according to FIG. 1 treated further.
  • pre-sorted municipal residual waste which is fed into the line (7) at a rate of 10 t / h, is turned into a rotating drum ( 8) abandoned with a capacity of 19 m 3 .
  • the residual waste has a lower calorific value of 10.5 MJ / kg and an ash content of 22% by weight.
  • the drum (8) rotates at 4 revolutions / min.
  • the combustion chamber (1) has a volume of 240 m 3 , the solid mixture in line (10) is fed directly to it.
  • the gas flows in different lines are: management 4th 4a 15 a 22 a 12th 20th Quantity (Nm 3 / h) 12,000 20000 6,600 3000 43000 43000 Temperature (° C) 100 100 480 650 900 200
  • the dust accumulating in the line (19a) and in a downstream electrostatic filter is returned to the combustion chamber (1).
  • the gas in line (20) has a NO x content of only 180 mg / m 3 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Incineration Of Waste (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
EP98101663A 1997-04-09 1998-01-31 Procédé d'incinération des déchets dans un lit fluidisé circulant Withdrawn EP0870985A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997114593 DE19714593A1 (de) 1997-04-09 1997-04-09 Verfahren zum Verbrennen von Abfallstoffen in einer zirkulierenden Wirbelschicht
DE19714593 1997-04-09

Publications (2)

Publication Number Publication Date
EP0870985A2 true EP0870985A2 (fr) 1998-10-14
EP0870985A3 EP0870985A3 (fr) 1999-07-21

Family

ID=7825872

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98101663A Withdrawn EP0870985A3 (fr) 1997-04-09 1998-01-31 Procédé d'incinération des déchets dans un lit fluidisé circulant

Country Status (3)

Country Link
EP (1) EP0870985A3 (fr)
JP (1) JPH1114026A (fr)
DE (1) DE19714593A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003025094A1 (fr) * 2001-09-19 2003-03-27 Herhof Umwelttechnik Gmbh Procede de reduction des matieres organiques d'une fraction minerale de dechets
FR2845982A1 (fr) * 2002-10-16 2004-04-23 Thel Etb -incinerateur de boues a lit fluidise circulant-sechage regule des boues dans une partie descendante du lit- -introduction pneumatique boues sechees et masse circulante en base incinerateur
CN105778942A (zh) * 2016-04-19 2016-07-20 华能国际电力股份有限公司 煤低温热解-燃烧一体化制取煤气焦油半焦系统及方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19937524A1 (de) 1999-08-03 2001-02-15 Harald Martin Verfahren und Vorrichtung zum Beseitigen von Abprodukten und Abfallstoffen
DE19937521A1 (de) 1999-08-03 2001-02-15 Harald Martin Verfahren und Vorrichtung zum Trocknen, Trennen, Klassieren und Zersetzen von Abprodukten
DE102005005796A1 (de) * 2005-02-09 2006-08-17 Applikations- Und Technikzentrum Für Energieverfahrens-, Umwelt- Und Strömungstechnik (Atz-Evus) Verfahren und Vorrichtung zur thermochemischen Umsetzung eines Brennstoffs
DE102005061298B4 (de) * 2005-12-21 2010-04-22 Mitsubishi Heavy Industries, Ltd. Fließbettofen
JP2017161084A (ja) * 2016-03-07 2017-09-14 太平洋セメント株式会社 燃料の燃焼方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5159886A (en) 1991-02-01 1992-11-03 Metallgesellschaft Aktiengesellschaft Process of combusting coal in a circulating fluidized bed
US5425317A (en) 1992-10-21 1995-06-20 Metallgesellschaft Aktiengesellschaft Process for gasifying waste materials which contain combustible constituents

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1561237A (en) * 1976-09-22 1980-02-13 Ahlstroem Oy Method of treating materials in a fluidized bed reactor
DE3811820A1 (de) * 1987-08-03 1989-02-16 Siemens Ag Verfahren und anlage zur thermischen abfallentsorgung
FI89742C (fi) * 1991-11-27 1993-11-10 Imatran Voima Oy Foerfarande och anordning foer torkning av braensle i en virvelbaeddspanna
US5345883A (en) * 1992-12-31 1994-09-13 Combustion Engineering, Inc. Reactivation of sorbent in a fluid bed boiler
IL114750A0 (en) * 1994-07-28 1995-11-27 Ormat Ind Ltd Method of and apparatus for efficiently combusting low grade solid fuel
JP3442521B2 (ja) * 1995-02-15 2003-09-02 株式会社タクマ 複合式流動層廃棄物燃焼ボイラ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5159886A (en) 1991-02-01 1992-11-03 Metallgesellschaft Aktiengesellschaft Process of combusting coal in a circulating fluidized bed
US5425317A (en) 1992-10-21 1995-06-20 Metallgesellschaft Aktiengesellschaft Process for gasifying waste materials which contain combustible constituents

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003025094A1 (fr) * 2001-09-19 2003-03-27 Herhof Umwelttechnik Gmbh Procede de reduction des matieres organiques d'une fraction minerale de dechets
FR2845982A1 (fr) * 2002-10-16 2004-04-23 Thel Etb -incinerateur de boues a lit fluidise circulant-sechage regule des boues dans une partie descendante du lit- -introduction pneumatique boues sechees et masse circulante en base incinerateur
CN105778942A (zh) * 2016-04-19 2016-07-20 华能国际电力股份有限公司 煤低温热解-燃烧一体化制取煤气焦油半焦系统及方法
CN105778942B (zh) * 2016-04-19 2019-03-26 华能国际电力股份有限公司 煤低温热解-燃烧一体化制取煤气焦油半焦系统及方法

Also Published As

Publication number Publication date
JPH1114026A (ja) 1999-01-22
EP0870985A3 (fr) 1999-07-21
DE19714593A1 (de) 1998-10-15

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