EP0549951B1 - Cheminée - Google Patents

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Publication number
EP0549951B1
EP0549951B1 EP92121368A EP92121368A EP0549951B1 EP 0549951 B1 EP0549951 B1 EP 0549951B1 EP 92121368 A EP92121368 A EP 92121368A EP 92121368 A EP92121368 A EP 92121368A EP 0549951 B1 EP0549951 B1 EP 0549951B1
Authority
EP
European Patent Office
Prior art keywords
chimney
rotor
flue gas
housing
rotor drive
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.)
Expired - Lifetime
Application number
EP92121368A
Other languages
German (de)
English (en)
Other versions
EP0549951A2 (fr
EP0549951A3 (en
Inventor
Wilhelm Dipl.-Ing. Kläfker
Ottmar Dipl.-Ing. Bacharach
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.)
Gebr Pfeiffer AG
Original Assignee
Gebr Pfeiffer 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 Gebr Pfeiffer AG filed Critical Gebr Pfeiffer AG
Publication of EP0549951A2 publication Critical patent/EP0549951A2/fr
Publication of EP0549951A3 publication Critical patent/EP0549951A3/de
Application granted granted Critical
Publication of EP0549951B1 publication Critical patent/EP0549951B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow

Definitions

  • the invention relates to flue gas fireplaces according to the preamble of claim 1 as they are used to derive the harmful smoke and exhaust gases at heights in commercial combustion plants, in particular power plants, which guarantee sufficient mixing with atmospheric air and thus guarantee a dilution when the gases are precipitated that is no longer harmful to humans as well as the flora and fauna.
  • Flue gas chimneys in modern power plants are typically 200 to 300 m high and dimensioned for flue gas quantities of, for example, 2.5 million m 3 / h and more.
  • the quantities of the gases to be discharged which can be calculated in the case of combustion plants based on the type and the quantity of fuels burned every hour, and the draft of the fireplace, which depends on the height of the fireplace, the temperature of the exhaust gases, are decisive Temperature of the outside air at the location of the fireplace and the additional fans.
  • the chimney draft is the negative pressure that prevails at the mouth of the flue gas duct or at the foot of the chimney. It represents the weight difference between the amount of warm exhaust gas inside the chimney and the same amount of cold outside air. From this theoretically effective tensile strength, the resistances have to be subtracted, which the gases have to overcome on their way from the fresh air entering the fireplace to the chimney outlet .
  • the following may be considered: the resistance of the fresh air in the grate and when penetrating the fuel layer, the resistance of the Combustion gases in the area of the boiler, in the steam superheater, in the fly ash trap, in the flue gas preheater, in the required filter, denitrification and desulfurization systems, along the flue gas duct and finally in the chimney pipe itself.
  • the dynamic classifiers according to US Pat. No. 3,486,314 are just as old as the static classifiers. Compared to the static classifiers, the dynamic classifiers have a better separation rate, a lower pressure loss and a lower dependence on the amount of gases flowing through due to their construction.
  • Dynamic classifiers are already used in coal-fired power plants to separate the coal ground in a mill into a coarse and a fine fraction. They process classifying air with a relatively high proportion of classifying material. Particles whose grain is larger than the separation limit are collected in a semolina cone at the bottom of the housing, while the so-called fine material leaves the housing with the classifying air. The fine material is separated from the visible air in downstream cyclones.
  • Electrostatic filters have separation rates of over 99%. The filtered flue gases are then desulphurized, denitrified and washed for reasons of air pollution control. Nevertheless, it is found that many particulate pollutants are still emitted at the chimney mouth. In coal or oil-fired power plants, these particles contain iron, sulfur dioxide and sulfuric acid, which means that they cause increased rust damage.
  • the present invention is therefore based on the object of specifying a flue gas fireplace which, under the given conditions, enables the residual fractions of solid particles still present after filtering, desulfurization, denitrification and washing of the flue gases to be eliminated to a very large extent without impermissibly increasing the flow resistances of the flue gases.
  • the housing of the particle separator stands on the foundation of the fireplace or on a foundation separate from the foundation of the fireplace.
  • the latter variant has the advantage that vibrations from the rotor do not affect the chimney.
  • the rotor drive i. H. the drive motor and the reduction gear are also positioned directly on the foundations.
  • the rotor drive can also hang under a separate intermediate floor in the classifier housing.
  • the average specialist will select the respective position based on the local conditions.
  • the shaft should be mounted on the drive shaft of the rotor drive or of the reduction gear in an angularly movable manner, preferably by means of a tooth coupling. This makes it easier to absorb vibrations and vibrations, which due to their extreme dimensions can never be completely avoided.
  • All figures show the base of a flue gas chimney 1, built on a foundation 8, with a side opening 2 for a flue gas duct 3.
  • the chimney 1 has a height of 270 m, for example, and is for a flue gas quantity of 2.8 million m 3 / h dimensioned.
  • the flue gas duct 3 then has a height of 10 m.
  • the 1 shows an upper intermediate floor 4 and a lower intermediate floor 5 inside the chimney 1, which is additionally supported by supports 7.
  • the bottom 6 of a dynamic classifier 10 is attached to the lower intermediate floor 5.
  • the classifier 10 has a housing 11, in the center of which a rotor 14 with vanes is fastened on a rotor shaft 13.
  • the rotor shaft 13 is driven with the aid of a speed-controllable rotor drive 15, which is under the intermediate floor 5 or the sifter floor 6 hangs on a special shaft bearing 16.
  • Radial struts 17 support the rotor shaft 13 below the rotor 14 against the housing 11.
  • the smoke gases arriving in the flue gas duct 3 go directly into the classifier housing 11, are freed of the particles still contained therein with the aid of the rotor 14 and leave the classifier 10 through a flue gas outlet 12 in the ceiling of the classifier housing 11.
  • the separated particles fall to the bottom 6 of the sifter 10, where they are removed mechanically.
  • FIG. 2 shows a variant of the embodiment shown in FIG. 1.
  • This variant relates to the additional support of the standing rotor shaft 13.
  • the support struts 18 are directed conically, so that they not only do not increase the flow resistance of the flue gases, but under certain circumstances even lower them, since they deflect the flue gases from the horizontal flow direction in the flue gas duct 3 in favor the vertical flow direction in the chimney 1.
  • FIG 3 shows an embodiment in which the classifier housing 11 does not stand on an intermediate floor of the chimney 1, but rather directly on a foundation 9 separate from the chimney foundation 8.
  • vibrations generated by the rotating classifier parts - rotor 14, rotor shaft 13 and rotor drive 15 - are directed not into the chimney 1 but into the foundation 9, thereby effectively preventing structural damage.
  • FIG. 3 shows an intermediate floor 19 in the classifier housing 11, on which the conically oriented support struts 18 of the standing rotor shaft 13 are supported.
  • the support struts 18 are preferred as closed support cone designed to support the aforementioned deflection of the flue gas flow from the horizontal in the flue gas duct 3 into the vertical in the chimney 1.
  • a conical annular space is formed between the classifier housing 11 and the supporting cone 18, in which the separated particles collect and from which they are drawn off with the aid of locks 20.
  • FIG. 4 finally shows an embodiment in which not only the classifier housing 11 but also the rotor drive, consisting of drive motor 24 and reduction gear 23, are on the base 8 of the chimney 1.
  • a tooth coupling 25 is provided between the drive shaft of the reduction gear 23 and the rotor shaft 13, which allows angular movements of the rotor shaft 13.
  • the rotor shaft 13 itself is supported by means of radial struts 22 above the rotor 14 against the housing 11.
  • An intermediate floor in the housing 11 is designed as a semolina cone 21, from which the separated particles are drawn off with the aid of the lock 20.

Claims (6)

  1. Cheminée pour fumées (1) d'installations de chauffe industrielles, avec une ouverture (2) pour un conduit de fumée (3), un séparateur de particules (10) monté dans la cheminée (1), la sortie (12) du séparateur de particules (10) pour les gaz épurés débouchant dans la cheminée (1) et une sortie étant prévue pour les particules séparées, caractérisée en ce que le séparateur de particules (10) présente un boîtier (11), en ce que le conduit de fumée (3) débouche dans le boîtier (11), en ce que le boîtier (11) possède dans la zone inférieure au moins un sas (20) pour les particules séparées et en ce que le séparateur de particules (10) est un séparateur à air dynamique qui présente un rotor (14) avec des ailettes, des lamelles ou des baguettes.
  2. Cheminée pour fumées selon la revendication 1, caractérisée en ce que le boîtier (11) du séparateur de particules (10) se trouve sur la fondation (8) de la cheminée (1) ou une fondation (9) séparée de celle-ci.
  3. Cheminée pour fumées selon la revendication 1 ou 2, caractérisée en ce que le rotor (14) se trouve sur son arbre (13), et l'arbre sur le moteur du rotor (15 ; 23, 24).
  4. Cheminée pour fumées selon la revendication 1 ou 3, caractérisée en ce que le moteur du rotor (15) est accroché sous un fond intermédiaire (5, 6) situé dans la cheminée (1) ou sous un fond intermédiaire (19) situé dans le boîtier (11) du séparateur de particules (10).
  5. Cheminée pour fumées selon l'une quelconque des revendications 1 à 4, caractérisée en ce que le moteur du rotor (23, 24) se trouve directement sur la fondation (8, 9).
  6. Cheminée pour fumées selon l'une quelconque des revendications 1 à 5, caractérisée en ce que l'arbre (13) est monté sur l'arbre de sortie du réducteur (23) de façon à permettre un mouvement angulaire, de préférence au moyen d'un accouplement à denture.
EP92121368A 1991-12-28 1992-12-16 Cheminée Expired - Lifetime EP0549951B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9116111U DE9116111U1 (fr) 1991-12-28 1991-12-28
DE9116111U 1991-12-28

Publications (3)

Publication Number Publication Date
EP0549951A2 EP0549951A2 (fr) 1993-07-07
EP0549951A3 EP0549951A3 (en) 1993-10-20
EP0549951B1 true EP0549951B1 (fr) 1996-09-11

Family

ID=6874661

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92121368A Expired - Lifetime EP0549951B1 (fr) 1991-12-28 1992-12-16 Cheminée

Country Status (4)

Country Link
EP (1) EP0549951B1 (fr)
AT (1) ATE142765T1 (fr)
DE (2) DE9116111U1 (fr)
DK (1) DK0549951T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114534377B (zh) * 2022-02-14 2023-05-16 山东莱钢永锋钢铁有限公司 一种减少湿法脱硫直排烟囱水滴携带的装置及施工方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765979A (en) * 1941-06-21 1956-10-09 Svenska Rotor Maskiner Ab Centrifuges for separating particles from gases
DE919965C (de) * 1950-02-01 1954-11-08 Bernhard Telgmann Flugstaubabscheider fuer Schornsteine
US3486314A (en) * 1967-02-15 1969-12-30 Sanford W Herrington Separator

Also Published As

Publication number Publication date
DE9116111U1 (fr) 1992-03-26
DE59207128D1 (de) 1996-10-17
EP0549951A2 (fr) 1993-07-07
DK0549951T3 (fr) 1997-02-17
EP0549951A3 (en) 1993-10-20
ATE142765T1 (de) 1996-09-15

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