EP0483678B1 - Chaudière à vapeur - Google Patents

Chaudière à vapeur Download PDF

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Publication number
EP0483678B1
EP0483678B1 EP19910118215 EP91118215A EP0483678B1 EP 0483678 B1 EP0483678 B1 EP 0483678B1 EP 19910118215 EP19910118215 EP 19910118215 EP 91118215 A EP91118215 A EP 91118215A EP 0483678 B1 EP0483678 B1 EP 0483678B1
Authority
EP
European Patent Office
Prior art keywords
steam boiler
fire
catalyst
boiler
accordance
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
EP19910118215
Other languages
German (de)
English (en)
Other versions
EP0483678A2 (fr
EP0483678A3 (en
Inventor
Otmar Dipl.-Ing. Bertsch
Konrad Dipl.-Ing. Schmidt
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.)
Josef Bertsch & Co GmbH
Original Assignee
Josef Bertsch & Co 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
Priority claimed from AT219790A external-priority patent/AT395470B/de
Application filed by Josef Bertsch & Co GmbH filed Critical Josef Bertsch & Co GmbH
Publication of EP0483678A2 publication Critical patent/EP0483678A2/fr
Publication of EP0483678A3 publication Critical patent/EP0483678A3/de
Application granted granted Critical
Publication of EP0483678B1 publication Critical patent/EP0483678B1/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/008—Adaptations for flue gas purification in steam generators

Definitions

  • the invention relates to a steam boiler with the features of the preamble of claim 1.
  • a steam boiler of this type is the subject of the document Patent Abstracts of Japan, vol 8, no 207 (M-327) (1644), September 21, 1984.
  • Such systems are indeed suitable for heating the flue gas entering the catalyst to the reaction temperature required here, but the associated outlay on equipment is extremely large and therefore expensive, so that such facilities are only suitable for large systems.
  • Such systems cannot be used with steam boilers for medium power, i.e. for power between 10 and 30 MW, because they are too complex and too expensive.
  • the cross section of the catalytic converter is therefore struck by a flue gas stream which has a very different temperature across its cross section, with relatively hot flue gas only flowing in laterally.
  • a flue gas stream which has a very different temperature across its cross section, with relatively hot flue gas only flowing in laterally.
  • the efficiency of the DeNO x system with a catalyst and an NH3 injector is the better, the more uniform the temperature of the flue gas is over the entire cross section of the flue; Flue gas of the same temperature flows over the entire cross section of the catalyst.
  • the boiler which is fired with oil via an oil burner 1, has a flame tube 2, which at the end merges into a first deflection cable 3 designed as a water tube cable.
  • a second train designed as a smoke pipe train 4, adjoins this deflection train 3, the pipes 5 of this train 4 running essentially parallel to the longitudinal axis of the flame pipe 2.
  • One of these flue pipes, namely the flue pipe 6, has a diameter which is a multiple, for example 6 times the diameter of the other flue pipes 5 of the flue pipe 4.
  • the flue pipe 4 opens into a chamber 7 arranged on the end of the steam boiler, which can be closed here with a boiler door 8.
  • the flue pipe 6 with the enlarged diameter lies in the middle region of the flue pipe 4.
  • the chamber-side end of the flue pipe 6 has an upward, pipe-like extension 25 (FIGS. 3 and 4), the mouth of which has openings 26 above the throttle valve 9.
  • a perforated plate 27 is arranged above the mouth opening of this pipe-like, upwardly directed extension 25 and at a distance therefrom, which extends over the entire cross section of the flue pipe 28.
  • the mouth opening of the pipe-like extension 25 lies in or above the plane of the uppermost pipes 5 of the smoke pipe train 4 (FIGS. 3 and 4).
  • throttle valves 30 are also pivotally mounted. These throttle valves are in the plane of the uppermost pipes 5 of the smoke pipe 4 or somewhat above the same.
  • the Partitions 29 are substantially parallel to the longitudinal center plane of the smoke pipe 6 having the pipe-like extension 25. They extend over the upper edge of the flue pipe 4.
  • the axes of all three throttle valves 9 and 30 are parallel to one another and are passed through the chamber door 8.
  • a single servomotor 10 is expediently provided for all throttle valves.
  • the chamber 7 merges into a first rising boiler section 11 and a subsequent falling boiler section 12, in which case an NH3 injector 13 is arranged in the falling boiler section 12 and at a distance below the actual catalyst 14, followed by the third boiler train 15, which in the chimney 16 opens.
  • the trains 4 and 15 connected upstream and downstream of the catalytic converter 14 are arranged horizontally and essentially parallel to one another.
  • a temperature sensor 17 is provided, which is operatively connected to the servomotor for the throttle valves 9 and 30 via a controller 18, which can be equipped with a temperature display device.
  • the flue gas leaving the flue pipe 4 and entering the chamber 7 has - viewed over the cross section of the chamber 7 - quite different temperatures. Thanks to the proposed device according to the invention, the flue gas located here and flowing through this section is thoroughly mixed so that a flue gas is present above the perforated plate 27, which has a uniform temperature over the entire cross section of the flue gas duct. If the steam boiler is driven to a higher load again, the throttles are actuated in the sense of a closing movement in section 12 via the temperature sensor 17, the controller 18 and the servomotor because of the consequent rise in the flue gas temperature.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chimneys And Flues (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Claims (9)

  1. Générateur de vapeur comportant plusieurs parcours (3, 4, 5) pour capacités moyennes ainsi qu'une installation de déNOx sous la forme d'un catalyseur (14) et un dispositif d'injection de NH₃ (13) pour réduire les fractions de NOx (dénitruration) dans les gaz de fumée, dans lequel le catalyseur (14), vu dans la direction d'écoulement des gaz de fumée, est agencé devant le dernier parcours (15) du générateur de vapeur dans une section (12) du générateur acheminant les gaz de fumée vers l'aval et la section du générateur disposée en amont de cette section (12) du générateur est réglable en terme de section transversale de passage en fonction de la température de la fumée régnant devant le catalyseur (14), et il est prévu, pour commander la section transversale de passage, un capteur de température (17) qui est situé de préférence entre le dispositif d'injection de NH₃ (13) et le catalyseur (14), cette section transversale de passage pouvant être agrandie en abaissant la température des gaz de fumée et la section de générateur disposée en amont du catalyseur (14) étant conformée en parcours (4) de tubes à fumée, caractérisé en ce qu'au moins un des tubes à fumée (6) formant ce parcours (4) de tubes à fumée présente un diamètre agrandi vis-à-vis des autres tubes à fumée (5) de ce parcours, la section transversale de passage de ce tube à fumée (6) est réglable via un clapet d'étranglement (9) et l'extrémité côté catalyseur du parcours (4) réglable en section transversale débouche dans une chambre (7) qui peut être fermée de préférence par une porte ou un clapet (8), L'extrémité côté catalyseur du tube à fumée (6) présentant le diamètre agrandi situé dans la chambre (7) se convertissant en un appendice (25) en forme de tuyau d'orgue dirigé vers le haut et un tôle perforée (27), disposée en substance horizontalement, étant prévue à distance de l'embouchure de cet appendice en forme de tuyau d'orgue (25).
  2. Générateur de vapeur selon la revendication 1, caractérisé en ce que la tôle perforée (27) s'étend sur toute la section transversale du parcours de tubes à fumée.
  3. Générateur de vapeur selon la revendication 1, caractérisé en ce qu'il est prévu dans l'appendice en forme de tuyau d'orgue (25) des découpes (26).
  4. Générateur de vapeur selon la revendication 1 ou 3, caractérisé en ce qu'il est prévu des tôles séparatrices (29) dressées verticalement des deux côtés de l'appendice en forme de tuyau d'orgue (25) et s'étendant sur la profondeur du parcours de tubes à fumée ou de la chambre (7), qui sont sensiblement parallèles au plan médian longitudinal du tube à fumée (6) présentant l'appendice en forme de tuyau d'orgue (25).
  5. Générateur de vapeur selon la revendication 4, caractérisé en ce que les tôles séparatrices (29) s'étendent jusqu'au bord supérieur du parcours de tubes à fumée (4).
  6. Générateur de vapeur selon la revendication 4 ou 5, caractérisé en ce qu'il est prévu dans les sections de chambre (7′) formées par les tôles séparatrices (29) des clapets d'étranglement qui influencent leurs sections transversales.
  7. Générateur de vapeur selon l'une quelconque des revendications 1 à 6, caractérisé en ce que les axes de tous les clapets d'étranglement (9, 30) sont parallèles l'un à l'autre.
  8. Générateur de vapeur selon la revendication 7, caractérisé en ce que tous les clapets d'étranglement (9, 30) présentent un entraînement commun.
  9. Générateur de vapeur selon la revendication 1, caractérisé en ce que le tube à fumée (6) présentant le diamètre agrandi se situe dans la zone centrale du parcours de tubes à fumée (4).
EP19910118215 1990-10-31 1991-10-25 Chaudière à vapeur Expired - Lifetime EP0483678B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT219790A AT395470B (de) 1989-10-19 1990-10-31 Dampfkessel
AT2197/90 1990-10-31

Publications (3)

Publication Number Publication Date
EP0483678A2 EP0483678A2 (fr) 1992-05-06
EP0483678A3 EP0483678A3 (en) 1992-11-19
EP0483678B1 true EP0483678B1 (fr) 1994-12-21

Family

ID=3529800

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910118215 Expired - Lifetime EP0483678B1 (fr) 1990-10-31 1991-10-25 Chaudière à vapeur

Country Status (2)

Country Link
EP (1) EP0483678B1 (fr)
DE (1) DE59103983D1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1092910A (fr) * 1976-07-27 1981-01-06 Ko'hei Hamabe Chaudiere avec dispositif de denitrification
JPS5995315A (ja) * 1982-11-22 1984-06-01 Haruo Matsumura 脱ｎｏｘボイラ−
DE3412499A1 (de) * 1984-04-03 1985-10-10 Balduin Dr. 8035 Gauting Pauli Rauchrohrausbildung, insbesondere fuer einen flammrohr-rauchrohrkessel sowie verfahren zum abscheiden von stickstoffoxiden aus dessen rauchgasen
DE3502788A1 (de) * 1985-01-28 1986-07-31 Saacke GmbH & Co KG, 2800 Bremen Verfahren und vorrichtung zum reduzieren der schadstoffemission von feuerungsanlagen
JPS61250405A (ja) * 1985-04-26 1986-11-07 三菱重工業株式会社 蒸気発生ボイラ

Also Published As

Publication number Publication date
DE59103983D1 (de) 1995-02-02
EP0483678A2 (fr) 1992-05-06
EP0483678A3 (en) 1992-11-19

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