EP0077434B1 - Procédé pour mélanger des courants de gaz brûlés - Google Patents

Procédé pour mélanger des courants de gaz brûlés Download PDF

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Publication number
EP0077434B1
EP0077434B1 EP82105748A EP82105748A EP0077434B1 EP 0077434 B1 EP0077434 B1 EP 0077434B1 EP 82105748 A EP82105748 A EP 82105748A EP 82105748 A EP82105748 A EP 82105748A EP 0077434 B1 EP0077434 B1 EP 0077434B1
Authority
EP
European Patent Office
Prior art keywords
flue gas
chimney
fact
flue
pipe
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
Application number
EP82105748A
Other languages
German (de)
English (en)
Other versions
EP0077434A1 (fr
Inventor
Friedhelm Henseler
Viktor Engel
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.)
Deutsche Babcock Bau GmbH
Original Assignee
Deutsche Babcock Bau 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6144353&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0077434(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Deutsche Babcock Bau GmbH filed Critical Deutsche Babcock Bau GmbH
Priority to AT82105748T priority Critical patent/ATE13465T1/de
Publication of EP0077434A1 publication Critical patent/EP0077434A1/fr
Application granted granted Critical
Publication of EP0077434B1 publication Critical patent/EP0077434B1/fr
Expired 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 
    • F23J11/00—Devices for conducting smoke or fumes, e.g. flues 
    • F23J11/02—Devices for conducting smoke or fumes, e.g. flues  for conducting smoke or fumes originating from various locations to the outside, e.g. in locomotive sheds, in garages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/10—Mixing gases with gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • 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
    • F23J15/08—Arrangements of devices for treating smoke or fumes of heaters

Definitions

  • the invention relates to a method for mixing flue gas flows of different temperatures and compositions in a chimney.
  • the process can be used in connection with a plant for wet desulfurization of flue gases.
  • Such wet desulfurization plants provide a flue gas with relatively low temperatures of about 50 to 80 ° C and a moisture enrichment close to the degree of saturation. These flue gases must be reheated before they are released into the environment in order to largely avoid premature condensation of the flue gases on cold contact surfaces.
  • a chimney is known from DE-C No. 428649, in the foot of which several flue gas ducts open tangentially.
  • the flue gas streams meet helical guiding surfaces in one plane, which forces them to move upwards while rotating.
  • DE-A1 No. 2504436 describes a chimney into which an exhaust gas flow is introduced through an intake pipe surrounded by a jacket.
  • air is supplied via an air line arranged perpendicular to the axis of the intake pipe. The air is deflected in channels in the annular space in an axial direction before, after heat exchange with the hot exhaust gas, it enters a mixing tube without turbulence through an annular gap and comes into contact with the exhaust gas there.
  • the invention has for its object to improve the method mentioned in such a way that effective mixing of the flue gas streams is achieved with simple means and at the same time it is ensured that the full, hot flue gas volume is introduced directly and easily into the chimney when the cold flue gas source is switched off can.
  • a first flue gas flow is introduced centrally into the chimney and in that one or more flue gas flows are introduced with a flow direction along a tangent or secant perpendicular to the flow direction of the first flue gas flow.
  • the flue gas stream with the lower temperature is preferably introduced centrally.
  • a vortex is generated in the chimney by the tangent or secant injection of the warmer flue gas stream.
  • the central blowing in of the colder flue gas stream causes swirling and intensive mixing of the different flue gas flows.
  • the warmer flue gas flow in the endangered lower area of the chimney flows along the so-called lining surfaces of the flue and thus keeps these lining surfaces warm. This is advantageous in relation to the inflowing colder flue gases, since these would otherwise condense on cold feed surfaces.
  • the direct blowing in of the full, hot flue gas flow to the preheated feed areas is harmless.
  • the chimney rests on a shelf on a shelf. It consists of an outer shaft 1, which surrounds a smoke tube 2.
  • the smoke pipe 2 is constructed from one or more pipe sections, which are supported on stages 3, which are supported on the inner wall of the shaft 1.
  • the shaft 1 and the flue pipe 2 can consist of concrete, steel or masonry.
  • the flue gases are supplied through the chimney base 4.
  • a flue gas supply pipe 5 is guided laterally into the chimney base 4 and bent at right angles so that its outlet opening 6 lies in the longitudinal axis of the chimney.
  • the outlet opening 6 is formed by a short tube section 7.
  • the diameter of the pipe section 7 is less than the inside diameter of the flue pipe 2 at this point of the chimney.
  • the pipe section 7 is surrounded at a distance by a ring 8 made of a heat-resistant material.
  • the outlet opening 6 of the flue gas supply pipe 5 has been moved higher into the chimney.
  • the flue gas supply pipe 5 is extended in the direction of the longitudinal axis of the chimney by a guide pipe 9 running concentrically to the flue pipe 2.
  • the length of the guide tube 9 in the vertical direction corresponds to up to five times its diameter.
  • a flue gas duct 10 continues into the chimney base 4.
  • the longitudinal axis 11 of the flue gas duct 10 is aligned with the chimney in such a way that it runs parallel to a tangent to the circumference of the flue pipe 2 or the guide pipe 9.
  • the longitudinal axis 11 of the flue gas duct 10 can also be aligned with a secant to the circumference of the flue pipe 2.
  • a plurality of flue gas ducts which are arranged in the manner described can also open into the interior of the flue pipe 2. These flue gas ducts can be arranged both on the same level and at different heights.
  • Throttle valves 12 can be provided in the flue gas supply pipe 5 and the flue gas duct 10. Depending on the position of these throttle valves 12, the speed of the flowing flue gas is increased or decreased. This enables controlled acceleration of the smoke gases to be introduced.
  • vortex internals can be provided in the flue gas feed pipe 5 or also in the flue gas duct 10 in the outlet area thereof.
  • These vortex internals consist either of cylindrical flow bodies 13 or of preferably A-shaped installation surfaces 14.
  • the vortexes which form behind the vortex internals ensure that the incoming flue gases are vortexed.
  • Another flue gas duct 15 branches off from the flue gas duct 10. This further flue gas duct 15 is directed obliquely upwards and opens into the flue pipe 2 above the flue gas duct 10. Before entering the chimney 15 shut-off valves 16 are arranged in the further flue gas duct, through which the flue gas introduction into the chimney can be shut off. The further flue gas duct 15 is used when the flue gas supply pipe 5 is not acted on.
  • the chimney described is used to carry out a method for mixing flue gas streams of different temperatures and compositions. This method will be explained using the example of heating flue gas cleaned in a wet desulfurization plant. It is assumed that only part of the flue gas generated in a steam generator has passed through the wet desulfurization plant.
  • the desulfurized flue gas leaves the wet desulfurization plant with a temperature of around 50 to 80 ° C and a moisture concentration close to the degree of saturation.
  • This flue gas is introduced into the chimney through the flue gas supply pipe 5 and enters the flue pipe 2 of the chimney centrally as the central flue gas flow I. Dust-free, but not desulfurized, flue gas with a temperature of approximately 130 ° C.
  • the chimney can be used without further measures if the wet desulfurization system is out of operation and the cold gas source is thus switched off.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chimneys And Flues (AREA)
  • Treating Waste Gases (AREA)

Claims (8)

1. Procédé pour le mélange de courants de fumée de températures et de compositions différentes dans une cheminée, caractérisé en ce qu'un premier courant de fumée est introduit centralement dans la cheminée et en ce qu'un ou plusieurs autres courants de fumée sont introduits dans la cheminée suivant la direction d'une tangente ou d'une sécante à angle droit à la direction d'écoulement du premier courant de fumée.
2. Procédé suivant la revendication 1, caractérisé en ce que les autres courants de fumée sont introduits dans la cheminée à la même hauteur.
3. Procédé suivant la revendication 1 ou les revendications 1 et 2, caractérisé en ce que les autres courants de fumée sont introduits dans la cheminée à différentes hauteurs.
4. Procédé suivant l'une ou plusieurs des revendications 1 à 3, caractérisé en ce que le courant de fumée avec la température plus basse est introduit centralement dans la cheminée.
5. Procédé suivant l'une ou plusieurs des revendications 1 à 4, caractérisé en ce que le premier courant de fumée est introduit dans la cheminée en plusieurs courants partiels parallèles.
6. Procédé suivant l'une ou plusieurs des revendications 1 à 5, caractérisé en ce que seul le courant de fumée plus chaud est mené le long de la paroi intérieure du tube de fumée.
7. Procédé suivant l'une ou plusieurs des revendications 1 à 6, caractérisé en ce que les courants de fumée sont mis en tourbillonnement, avant leur entrée dans la cheminée.
8. Procédé suivant l'une ou plusieurs des revendications 1 à 7, caractérisé en ce que la vitesse des courants de fumée est modifiée.
EP82105748A 1981-10-17 1982-06-29 Procédé pour mélanger des courants de gaz brûlés Expired EP0077434B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82105748T ATE13465T1 (de) 1981-10-17 1982-06-29 Verfahren zum mischen von rauchgasstroemen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813141337 DE3141337A1 (de) 1981-10-17 1981-10-17 Verfahren und vorrichtung zum mischen von rauchgasstroemen
DE3141337 1981-10-17

Publications (2)

Publication Number Publication Date
EP0077434A1 EP0077434A1 (fr) 1983-04-27
EP0077434B1 true EP0077434B1 (fr) 1985-05-22

Family

ID=6144353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82105748A Expired EP0077434B1 (fr) 1981-10-17 1982-06-29 Procédé pour mélanger des courants de gaz brûlés

Country Status (3)

Country Link
EP (1) EP0077434B1 (fr)
AT (1) ATE13465T1 (fr)
DE (2) DE3141337A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8304273D0 (sv) * 1983-08-04 1983-08-04 Skf Steel Eng Ab Sett och anordning for upphettning av en gas med en annan gas
CN2853894Y (zh) * 2005-09-19 2007-01-03 孙国亮 可排放市区污染空气的管筒式直立线杆结构

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE428649C (de) * 1924-09-02 1926-05-10 August Holtzheuer Schornstein fuer industrielle Anlagen
RO66562A2 (fr) * 1974-05-23 1978-12-15 Inst Pentru Creatie Stintific Procede et dispositif pour l'extraction des gaz a les installations thermique

Also Published As

Publication number Publication date
ATE13465T1 (de) 1985-06-15
EP0077434A1 (fr) 1983-04-27
DE3141337A1 (de) 1983-05-05
DE3263736D1 (en) 1985-06-27

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