EP0502220B1 - Chaudière à tubes d'eau - Google Patents

Chaudière à tubes d'eau Download PDF

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Publication number
EP0502220B1
EP0502220B1 EP19910103143 EP91103143A EP0502220B1 EP 0502220 B1 EP0502220 B1 EP 0502220B1 EP 19910103143 EP19910103143 EP 19910103143 EP 91103143 A EP91103143 A EP 91103143A EP 0502220 B1 EP0502220 B1 EP 0502220B1
Authority
EP
European Patent Office
Prior art keywords
flue
smoke
catalyst
section
cross
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
EP19910103143
Other languages
German (de)
English (en)
Other versions
EP0502220A1 (fr
Inventor
Konrad Dipl.-Ing. Schmidt
Otmar Dipl.-Ing. Bertsch
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
Application filed by Josef Bertsch & Co GmbH filed Critical Josef Bertsch & Co GmbH
Priority to DE59101872T priority Critical patent/DE59101872D1/de
Priority to EP19910103143 priority patent/EP0502220B1/fr
Publication of EP0502220A1 publication Critical patent/EP0502220A1/fr
Application granted granted Critical
Publication of EP0502220B1 publication Critical patent/EP0502220B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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

Definitions

  • the invention relates to a steam boiler with several trains (3, 4, 15) for medium outputs and with a DeNO x system in the form of a catalyst and an NH 3 injection device for reducing the NO x components (denitrification) in the flue gas
  • the catalyst viewed in the direction of flow of the flue gases, is arranged in a boiler section leading down the flue gases before the last draft of the steam boiler and the boiler section upstream of this boiler section can be regulated in terms of its passage cross section depending on the flue gas temperature prevailing in front of the catalyst, and a temperature sensor for controlling the passage cross section is provided, which is preferably between the NH3-injection device and the catalyst, this passage cross section can be increased with decreasing flue gas temperature.
  • 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 invention is based on this state of the art and it aims to simplify the plant or device in terms of its structural complexity and to improve it in terms of its efficiency and, above all, to ensure that the catalyst crosses its entire cross-section Flue gas is flowed at a uniform temperature, which is achieved by the measures of the characterizing part of claim 1.
  • the throttle valve is arranged on the catalyst-side end of the flue pipe.
  • the throttle valve and the adjusting mechanism belonging to it lie in an area in which the hot flue gas has already cooled relatively far, which is particularly important for the selection of the materials of these components and their possible cooling.
  • the train upstream of the catalytic converter is designed as a flue pipe train with flue pipes of essentially the same diameter and several of these flue pipes have temperature-controlled closure members that narrow the passage cross section, for example throttle valves.
  • both the upstream and the downstream trains are arranged horizontally, the main flow direction of the flue gases in these trains runs essentially horizontally.
  • the catalyst-side end of the train which can be regulated in the passage cross-section opens into a chamber which can be closed by means of a door or flap, the chamber preferably being on the front side Boiler is provided.
  • FIG. 1 shows the end view of a steam boiler of medium power (15 MW) having three trains;
  • Figure 2 is a horizontal section along the line II - II in Fig. 1.
  • 3 shows the catalyst-side end of the flue pipe with the boiler door open on an enlarged scale compared to FIGS. 1 and 2;
  • Figure 4 is a section along the line IV - IV in Fig. 3.
  • Fig. 5 is an end view of a boiler with two flame tubes.
  • 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.
  • This flue pipe 4 opens into a chamber 7 arranged at the end of the steam boiler, which can be closed here with a boiler door 8.
  • a throttle valve 9 is rotatably mounted, which can be actuated via a servomotor 10 on the outside of the boiler.
  • the chamber 7 merges into a first rising boiler section 11 and an adjoining one falling boiler section 12, wherein in the falling boiler section 12 an NH3 injector is arranged and at a distance below the actual catalyst 14, followed by the third boiler train 15, which opens into the chimney 16.
  • 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 in operative connection with the servomotor 10 of the throttle valve 9 via a controller 18, which can be equipped with a temperature display device.
  • the throttle valve 9 By opening the throttle valve 9, the passage cross section of the Catalyst 14 upstream smoke tube train 4, which determines the flow resistance of this train, reduced so that the hot flue gas reaches the catalyst 14 more quickly and with less cooling, so that its operating temperature can be kept substantially constant. If the steam boiler is driven to a higher load again, the throttle is actuated in the sense of a closing movement in section 12 via the temperature sensor 17, the controller 18 and the servomotor 10 because of the resulting rise in the flue gas temperature.
  • the second flue pipe 4 upstream of the catalytic converter is equipped with a flue pipe with an enlarged diameter. It is within the scope of the invention to possibly provide several flue pipes with an enlarged diameter and to assign each of these flue pipes a temperature-controlled throttle valve, in which case these flue pipes fitted with these throttle valves can be switched on or off in stages.
  • a throttle valve 9 has been shown and described above as the control element, it is basically possible to use other control elements that change the passage cross section, for example in the form of iris diaphragms.
  • a further possibility for realizing the idea according to the invention is to provide several flue pipes with different diameters in the flue pipe 4 and to equip these flue pipes with closure elements to be operated depending on the temperature.
  • the dash-dotted line 19 means the heat insulation envelope surrounding the steam boiler.
  • Fig. 5 now illustrates the front view of a boiler with two flame tubes and two separate flue gas flues, each flue gas flue being designed in the manner as described and explained above in connection with FIGS. 1 to 4, for which reason the same parts here have been given the same reference numbers.
  • Each of the two catalysts 14 is assigned its own flue gas temperature control.

Landscapes

  • 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 (7)

  1. Chaudière de vapeur comportant plusieurs parcours (3, 4, 15) pour capacités moyennes et une installation de deNOx sous la forme d'un catalyseur (14) et d'un dispositif d'injection de NH₃ (13) pour réduire les fractions de NOx (dénitruration) des gaz de fumée, le catalyseur (14) étant agencé, en se référant au sens d'écoulement des gaz de fumée, devant le dernier parcours (15) de la chaudière de vapeur dans une section (12) de la chaudière guidant les gaz de fumée vers le bas et la section transversale de passage de la section de la chaudière installée en amont de cette section (12) de la chaudière étant réglable en fonction de la température des gaz de fumée régnant devant le catalyseur (14), et dans laquelle il est prévu, pour commander la section transversale de passage, un capteur de température (17) qui est agencé de préférence entre le dispositif d'injection de NH₃ et le catalyseur (14), cette section transversale de passage pouvant être augmentée lorsque la température des gaz de fumée décroît, caractérisée en ce que la section de la chaudière montée en amont du catalyseur (14) est conformée en parcours tubulaire de fumée et soit au moins un des tubes de fumée (6) formant ce parcours tubulaire présente un diamètre plus important par rapport aux autres tubes de fumée (5) et le diamètre de ce tube de fumée (6) est réglable via un clapet de réglage (9), soit elle est conformée en parcours tubulaire de fumée (4) avec des tubes de fumée de diamètre sensiblement égal et plusieurs de ces tubes de fumée présentent des éléments de fermeture rétrécissant la section transversale de passage, commandés par la température, par exemple des clapets de réglage (9).
  2. Chaudière de vapeur selon la revendication 1, caractérisée en ce que le clapet de réglage (9) est installé sur l'extrémité du tube de fumée (6) côté catalyseur.
  3. Chaudière de vapeur selon la revendication 1, caractérisée en ce que le diamètre du tube de fumée (6) de section transversale de passage réglable est de plusieurs fois, par exemple 3 à 6 fois le diamètre des autres tubes de fumée (5) du parcours tubulaire de fumée.
  4. Chaudière de vapeur selon la revendication 1, caractérisée en ce que les parcours (4, 15) agencés en amont du catalyseur (14) et en aval du catalyseur (14) sont tous deux installés horizontalement et la direction d'écoulement principale des gaz de fumée dans ces parcours (4, 15) est sensiblement horizontale.
  5. Chaudière de vapeur selon la revendication 4, caractérisée en ce que les deux parcours (4, 15) sont disposés sensiblement parallèlement l'un à l'autre et les directions d'écoulement principales des gaz de fumée dans ces parcours (4, 15) sont dans des directions opposées l'une à l'autre.
  6. Chaudière de vapeur selon la revendication 5, caractérisée en ce que l'extrémité du parcours (4) réglable en section transversale de passage côté catalyseur débouche dans une chambre (7) qui peut être obturée par une porte ou un clapet (8).
  7. Chaudière de vapeur selon la revendication 6, caractérisée en ce que la chambre (7) est agencée sur la partie frontale de la chaudière.
EP19910103143 1991-03-02 1991-03-02 Chaudière à tubes d'eau Expired - Lifetime EP0502220B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59101872T DE59101872D1 (de) 1991-03-02 1991-03-02 Wasserrohrkessel.
EP19910103143 EP0502220B1 (fr) 1991-03-02 1991-03-02 Chaudière à tubes d'eau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19910103143 EP0502220B1 (fr) 1991-03-02 1991-03-02 Chaudière à tubes d'eau

Publications (2)

Publication Number Publication Date
EP0502220A1 EP0502220A1 (fr) 1992-09-09
EP0502220B1 true EP0502220B1 (fr) 1994-06-08

Family

ID=8206473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910103143 Expired - Lifetime EP0502220B1 (fr) 1991-03-02 1991-03-02 Chaudière à tubes d'eau

Country Status (2)

Country Link
EP (1) EP0502220B1 (fr)
DE (1) DE59101872D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104110672A (zh) * 2013-04-19 2014-10-22 上海运能能源科技有限公司 燃油燃气蒸汽热水锅炉的外湿背装置及锅炉

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2596321Y2 (ja) * 1993-07-12 1999-06-14 三菱重工業株式会社 脱硝装置におけるガス整流器
DE19606135C2 (de) * 1996-02-20 1999-01-14 Erc Emissions Reduzierungs Con Katalysatoranordnung, insbesondere für einen Dreizugkessel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4572110A (en) * 1985-03-01 1986-02-25 Energy Services Inc. Combined heat recovery and emission control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104110672A (zh) * 2013-04-19 2014-10-22 上海运能能源科技有限公司 燃油燃气蒸汽热水锅炉的外湿背装置及锅炉
CN104110672B (zh) * 2013-04-19 2016-06-01 上海运能能源科技有限公司 燃油燃气蒸汽热水锅炉的外湿背装置及锅炉

Also Published As

Publication number Publication date
EP0502220A1 (fr) 1992-09-09
DE59101872D1 (de) 1994-07-14

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