WO1994014002A1 - Chaudiere de combustion a impulsions - Google Patents

Chaudiere de combustion a impulsions Download PDF

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Publication number
WO1994014002A1
WO1994014002A1 PCT/FI1993/000513 FI9300513W WO9414002A1 WO 1994014002 A1 WO1994014002 A1 WO 1994014002A1 FI 9300513 W FI9300513 W FI 9300513W WO 9414002 A1 WO9414002 A1 WO 9414002A1
Authority
WO
WIPO (PCT)
Prior art keywords
boiler
accordance
separator
pulse combustion
combustion boiler
Prior art date
Application number
PCT/FI1993/000513
Other languages
English (en)
Inventor
Veli-Pekka Heiskanen
Markku Orjala
João Andrade DE CARVALHO, Jr.
Marco Aurélio FERREIRA
Claudio Bressan
Original Assignee
Valtion Teknillinen Tutkimuskeskus
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 Valtion Teknillinen Tutkimuskeskus filed Critical Valtion Teknillinen Tutkimuskeskus
Priority to BR9307583-9A priority Critical patent/BR9307583A/pt
Priority to EP94900845A priority patent/EP0670984A1/fr
Publication of WO1994014002A1 publication Critical patent/WO1994014002A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B1/00—Combustion apparatus using only lump fuel
    • F23B1/30—Combustion apparatus using only lump fuel characterised by the form of combustion chamber
    • F23B1/36—Combustion apparatus using only lump fuel characterised by the form of combustion chamber shaft-type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B5/00—Combustion apparatus with arrangements for burning uncombusted material from primary combustion
    • F23B5/02—Combustion apparatus with arrangements for burning uncombusted material from primary combustion in main combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B7/00—Combustion techniques; Other solid-fuel combustion apparatus

Definitions

  • the object of the invention is a pulse combustion boiler, which includes an essentially vertical combustion tube, a compensation chamber at its lower end, a grate in the lower part of the combustion tube, fuel feed devices for feeding fuel to the grate, combustion air feed devices, and one or more heat ex ⁇ change surfaces for recovering the head produced by the boiler.
  • a pulse combustion boiler of the type referred to in the intro ⁇ duction is presented in the congress publication ENCIT 90 VOL II, Itapema 10. - 12.12.1990, pp. 761 - 766; Ferreira et al..
  • Advantages of a pulse combustion boiler that can be mentioned are a very high grate loading (4,2 - 5,1 M /m 2 ) and a small excess amount of air, both of which advantages are principally due to acoustic vibration material and heat transfer, as well as to the improved gas mixing effect.
  • This type of boiler is especially suitable for solid fuels.
  • the intention of this invention is to improve the efficiency of present pulse combustion boilers.
  • the characteristics of a boiler in accordance with the invention are presented in the accompanying Patent Claims.
  • the invention is, to a great extent, based on the observation that it is also possible to arrange a compensation chamber with possible heat surfaces at the upper end of the combustion tube, from which the flue gases are directed to a separator in order to remove unburnt particles and return them along a suitable return line to the combustion tube.
  • the pressure los caused by this arrangement has not been shown to disturb the pulsing of the combustion.
  • the efficiency of the boiler can be made very high and is required normal ash can be separated by means of a flue gas cleaner, e.g. a multicyclone, connected to the flue gas line after a separate rotation sepa ⁇ rator, especially to separate fly ash.
  • the pulse combustion boiler includes first of all a combustion tube 1, a compensation chamber at the foot of this, fuel feed devices 12, 13, and 14, a grate, and air feed devices 21 and 25.
  • the boiler includes an upper compensation chamber 3, a separator 15 in the form of a cyclone connected to this by channel 24, and a return line 19 from this leading the unburnt particles back to the combustion tube.
  • combustion tube 1 is covered with a water jacket 4, which includes water inlet and outlet connections 5 and 6.
  • a water jacket 4 which includes water inlet and outlet connections 5 and 6.
  • Fuel is poured into silo 11, which leads to tube 12, from which feed device 13 regulates the fuel to be led through pipe 14 to the combustion tube above grate 7.
  • Grate 7 is formed by a perforated surface and above it additional mixing wings 8 are used, which are rotated by motor 9 located in compensation chamber 2.
  • Cone 10 is used as protection for the motor. Naturally, it is possible to locate the motor elsewhere as well.
  • the fan 25 pushes air through channel 21 to the compen- sation chamber 2, through which the air is led to the combustion tube 1.
  • Channel 24 leads from the compensation chamber 3 and forms a small pressure loss in order to stabilize conditions in the system formed by compensation chambers 2 and 3 and combustion tube 1, as well as to increase the velocity of flow when par ⁇ ticles are led to cyclone 15.
  • a conventional flue gas cleaner e.g. a multicylone or any suitable separator whatever for fly ash and other emissions, can be connected to flue gas connection 17.
  • Return line 19 is connected to the solid particle outlet connec ⁇ tion 16.
  • the return channel includes a sampling and rotating mass removal device 20, which in normal operation is switched off and permits a free flow of particles along the return line 19 to the combustion tube 1.
  • a sampling and rotating mass removal device 20 which in normal operation is switched off and permits a free flow of particles along the return line 19 to the combustion tube 1.
  • air blowing with the aid of blow tube 18, which by means of an ejector effect creates the necessary pressure in the return line 19 in relation to combustion tube 1.
  • a shut-off feed of this kind is shown schematically in Figure 1 by the reference number 29.
  • the upper compensation chamber is equipped with heat exchange surfaces.
  • the operation is more stable when separate intermediate chambers are used, in which the heat exchange surfaces are installed.

Abstract

Chaudière de combustion à impulsions comprenant un tube de combustion essentiellement vertical (1), une chambre de compensation (2) au niveau de son extrémité inférieure, une grille (7) dans la partie inférieure du tube de combustion, des dispositifs (12, 13, 14) d'alimentation de la grille (7) en combustible, des dispositifs (21, 25) d'alimentation en air de combustion, et une ou plusieurs surfaces d'échange thermique (23) servant à récupérer la chaleur produite par la chaudière. La chaudière comprend une chambre supérieure de compensation (1) au niveau de son extrémité supérieur, et un séparateur (15) monté en aval de cette chambre et destiné à séparer les particules non brûlées. Un raccord (16) de sortie de particules solides est relié par l'intermédiaire d'un conduit de retour (19) à la zone située au-dessus de la grille (7) du tube de combustion (1) afin de brûler les résidus non brûlés et de réduire ainsi les pertes.
PCT/FI1993/000513 1992-12-04 1993-12-01 Chaudiere de combustion a impulsions WO1994014002A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BR9307583-9A BR9307583A (pt) 1992-12-04 1993-12-01 Uma caldeira de combustão a pulsos
EP94900845A EP0670984A1 (fr) 1992-12-04 1993-12-01 Chaudiere de combustion a impulsions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI925507A FI91558C (fi) 1992-12-04 1992-12-04 Pulssipolttokattila
FI925507 1992-12-04

Publications (1)

Publication Number Publication Date
WO1994014002A1 true WO1994014002A1 (fr) 1994-06-23

Family

ID=8536332

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1993/000513 WO1994014002A1 (fr) 1992-12-04 1993-12-01 Chaudiere de combustion a impulsions

Country Status (4)

Country Link
EP (1) EP0670984A1 (fr)
BR (1) BR9307583A (fr)
FI (1) FI91558C (fr)
WO (1) WO1994014002A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2452895C2 (ru) * 2009-11-19 2012-06-10 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Казанский (Приволжский) Федеральный Университет" (ФГАОУ ВПО "КФУ") Устройство для сжигания кускового твердого топлива в пульсирующем потоке
CN102679541A (zh) * 2012-06-05 2012-09-19 农业部规划设计研究院 一种生物质燃料脉动燃烧式热风加热装置及其使用方法
CN104949122A (zh) * 2015-06-12 2015-09-30 贵州盘江煤层气开发利用有限责任公司 一种富氧瓦斯气体脉动燃烧装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4592292A (en) * 1983-12-02 1986-06-03 Asea Stal Ab Method and apparatus for activating large particles
EP0294024A1 (fr) * 1987-05-15 1988-12-07 Foster Wheeler Energy Corporation Procédé d'élimination des oxydes d'azote d'un gaz
DE3839861A1 (de) * 1988-11-25 1990-05-31 Rudi Pedersen Heizanlage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4592292A (en) * 1983-12-02 1986-06-03 Asea Stal Ab Method and apparatus for activating large particles
EP0294024A1 (fr) * 1987-05-15 1988-12-07 Foster Wheeler Energy Corporation Procédé d'élimination des oxydes d'azote d'un gaz
DE3839861A1 (de) * 1988-11-25 1990-05-31 Rudi Pedersen Heizanlage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DERWENT'S ABSTRACT, No. L1655 D/43, week 8143; & SU,A,800485 (KAZAN LENIN UNIV), 10 February 1981 (10.02.81). *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2452895C2 (ru) * 2009-11-19 2012-06-10 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Казанский (Приволжский) Федеральный Университет" (ФГАОУ ВПО "КФУ") Устройство для сжигания кускового твердого топлива в пульсирующем потоке
CN102679541A (zh) * 2012-06-05 2012-09-19 农业部规划设计研究院 一种生物质燃料脉动燃烧式热风加热装置及其使用方法
CN104949122A (zh) * 2015-06-12 2015-09-30 贵州盘江煤层气开发利用有限责任公司 一种富氧瓦斯气体脉动燃烧装置

Also Published As

Publication number Publication date
FI925507A0 (fi) 1992-12-04
EP0670984A1 (fr) 1995-09-13
FI91558C (fi) 1994-07-11
BR9307583A (pt) 1999-08-31
FI91558B (fi) 1994-03-31

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