EP0324201A1 - Procédé pour régler la production de vapeur dans une installation à combustion - Google Patents

Procédé pour régler la production de vapeur dans une installation à combustion Download PDF

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Publication number
EP0324201A1
EP0324201A1 EP88202774A EP88202774A EP0324201A1 EP 0324201 A1 EP0324201 A1 EP 0324201A1 EP 88202774 A EP88202774 A EP 88202774A EP 88202774 A EP88202774 A EP 88202774A EP 0324201 A1 EP0324201 A1 EP 0324201A1
Authority
EP
European Patent Office
Prior art keywords
water vapor
combustion
combustion zone
heat exchanger
air
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.)
Granted
Application number
EP88202774A
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German (de)
English (en)
Other versions
EP0324201B1 (fr
Inventor
Alfred Dr. Karbach
Georg Dr. Schaub
Rolf Dr. Peters
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.)
GEA Group AG
Original Assignee
Metallgesellschaft 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6345257&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0324201(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Metallgesellschaft AG filed Critical Metallgesellschaft AG
Priority to AT88202774T priority Critical patent/ATE63626T1/de
Publication of EP0324201A1 publication Critical patent/EP0324201A1/fr
Application granted granted Critical
Publication of EP0324201B1 publication Critical patent/EP0324201B1/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
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
    • F22B31/0084—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed with recirculation of separated solids or with cooling of the bed particles outside the combustion bed

Definitions

  • the invention relates to a method for regulating the generation of water vapor in a plant for burning solid, fine-grained and dusty fuels with air in the combustion zone of a circulating fluidized bed, with a heat exchanger in the upper region of the combustion zone, with a water vapor accumulator connected to the heat exchanger and with one Steam feed line from the steam storage to a turbine.
  • the method is also suitable for an incinerator, which includes a fluidized bed cooling with several chambers, to which part of the combustion residue is added.
  • the amount of water vapor generated in the fluid bed cooling is added to the amount of water vapor generated in the combustion zone.
  • the pressure and temperature above and below the heat exchanger in the combustion zone and the temperature in the chambers belonging to the evaporators are expediently measured, the heat transfer coefficients (K values) of the evaporators in a control system are calculated taking these measurements into account, and the temperature in the water vapor storage is measured and calculates the associated heat flows and the total amount of water vapor currently generated, taking into account the K values for the evaporators.
  • This calculated total quantity is compared with the target value in at least one controller and the supply of fuel and combustion air is changed according to the difference.
  • the plant for generating the water vapor consists of a circulating fluidized bed (1) with a separating cyclone (2), fluid bed cooling (3), heat exchanger (4) and water vapor storage (5).
  • the heat exchanger (4) is located in the upper area of the combustion zone (7), e.g. from vertical, parallel tubes (4a).
  • the tubes are preferably arranged in a ring on the inside of the wall of the combustion zone.
  • the fine-grained and dust-like fuel in particular coal
  • Pre-heated primary air conveys the blower (13) into the lower end of the fluidized bed and secondary air is supplied through the blower (14).
  • Solids and gases leave combustion through the channel (15) and are separated in the cyclone (2), the gases in line (17) being drawn off and being fed to a gas cleaning device (not shown).
  • the separated solids are partly returned to the combustion zone (7) through lines (18) and (19), the remaining solids are fed through line (20) to the fluid bed cooling (3).
  • the fluid bed cooling (3) is divided by partition walls (8) into several, only partially closed chambers (3a, 3b, 3c). Solids and gases can pass from one chamber to the other.
  • a blower (22) feeds air to each chamber, which keeps the solids in a swirling motion.
  • Heat exchangers (6a, 6b, 6c) belong to each chamber. If you put water in these heat exchangers to evaporate it, they are called “evaporators”below; the heat exchanger (s) to which water vapor is added to overheat them are called “superheaters”.
  • the heated exhaust air from the fluidized bed cooling (3) is fed into the combustion zone (7) in line (23), and part of the cooled solids is also conducted back through line (24) into the combustion zone (7), excess solids are drawn off in line (25).
  • the evaporators in the fluid bed cooling (3) also contribute to the steam production, the temperature must be monitored in each chamber which contains an evaporator. Chambers with superheaters are not monitored.
  • the chamber (3a) has a heat exchanger (6a), which works as a superheater, whereas the heat exchangers (6b) and (6c) of the chambers (3b) and (3c) of the evaporation of water serve.
  • the chamber (3c) therefore has the temperature monitor TV (1) and the chamber (3b) contains the temperature monitor TV (2).
  • the number of chambers in the fluid bed cooling (3) can fluctuate, and one or more of these chambers can also contain evaporators.
  • FIG. 2 shows how the various measuring points shown in FIG. 1, namely T1, T2, T4, T5, p1, p2, TV (1) and TV (2), transmit their information via signal lines to a control system ( 40) feed.
  • This control system can be tailored to the calculations described below, but it can also be a computer.
  • the control system (40) continuously calculates the currently generated amount of water vapor in the system and gives this information as an actual value to the controllers (41) and (42).
  • the regulators are also given the setpoint m of the amount of water vapor required by the turbine (34) and brought up in the line (33).
  • the output of the controller (41) leads via the signal line (45) to the fuel supply device (10) and ensures that if the steam production is too low, more fuel is fed into the combustion (7).
  • the controller (42) controls the blower (13) via the signal line (46) and the blower (14) via the signal line (47). It ensures that when there is an increased fuel requirement in combustion (7), sufficient combustion air is introduced.
  • the following formulas are used, in which the temperature in ° C and the pressure in mbar are to be used:
  • K value: K a * (p2-p1) - b + c * (T1 + T2) + d * T4
  • a 4 to 6
  • b 75.9 to 121
  • c 0.082 to 0.123
  • d 0.104 to 0.157
  • the exact value of a coefficient is to be determined during the trial operation of the system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Incineration Of Waste (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
EP88202774A 1988-01-14 1988-12-05 Procédé pour régler la production de vapeur dans une installation à combustion Expired - Lifetime EP0324201B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88202774T ATE63626T1 (de) 1988-01-14 1988-12-05 Verfahren zum regeln der wasserdampferzeugung in einer verbrennungsanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3800863 1988-01-14
DE3800863A DE3800863A1 (de) 1988-01-14 1988-01-14 Verfahren zum regeln der wasserdampferzeugung in einer verbrennungsanlage

Publications (2)

Publication Number Publication Date
EP0324201A1 true EP0324201A1 (fr) 1989-07-19
EP0324201B1 EP0324201B1 (fr) 1991-05-15

Family

ID=6345257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88202774A Expired - Lifetime EP0324201B1 (fr) 1988-01-14 1988-12-05 Procédé pour régler la production de vapeur dans une installation à combustion

Country Status (9)

Country Link
US (1) US4884408A (fr)
EP (1) EP0324201B1 (fr)
JP (1) JPH01219401A (fr)
AT (1) ATE63626T1 (fr)
AU (1) AU608112B2 (fr)
CA (1) CA1326793C (fr)
DE (2) DE3800863A1 (fr)
ES (1) ES2022606B3 (fr)
ZA (1) ZA89225B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0444926A2 (fr) * 1990-03-01 1991-09-04 Foster Wheeler Energy Corporation Combustion à lit fluidisÀ© avec un échangeur de chaleur intégré de recirculation avec des chambres d'entrée et de sortie
WO1995000804A1 (fr) * 1993-06-24 1995-01-05 A. Ahlstrom Corporation Procede de traitement de matieres solides a des temperatures elevees

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4102959A1 (de) * 1991-02-01 1992-08-13 Metallgesellschaft Ag Verfahren zum verbrennen von kohle in der zirkulierenden wirbelschicht
DE19912035C2 (de) * 1998-03-27 2002-01-24 Harry Kraus Feuerungseinrichtung zur Dampferzeugung
JP2007271133A (ja) * 2006-03-30 2007-10-18 Osaka Gas Co Ltd 貫流ボイラーおよびアキュムレーターを備えた蒸気発生器
AU2007353757B2 (en) * 2007-05-17 2013-02-07 Enero Inventions Immediate response steam generating system and method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072130A (en) * 1976-12-01 1978-02-07 The Ducon Company, Inc. Apparatus and method for generating steam
US4136642A (en) * 1976-10-13 1979-01-30 Ckd Dukla, Narodni Podnik Method of and apparatus for regulating steam and hot water boilers employing fluidized fuel
EP0068301A1 (fr) * 1981-07-01 1983-01-05 Deutsche Babcock Anlagen Aktiengesellschaft Générateur de vapeur avec foyer à lit fluidisé circulant, à pression atmosphérique ou suralimenté
WO1983003294A1 (fr) * 1982-03-15 1983-09-29 STRÖMBERG, Lars, Ake Chaudiere rapide a lit fluidifie et procede de commande de la chaudiere
US4453495A (en) * 1983-03-23 1984-06-12 Electrodyne Research Corporation Integrated control for a steam generator circulating fluidized bed firing system
EP0156703A1 (fr) * 1984-03-08 1985-10-02 Framatome Procédé et appareillage de contrôle du transfert thermique réalisé dans un lit fluidisé

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906731A (en) * 1973-01-24 1975-09-23 Lear Motors Corp Control system for vapor engines
US4039846A (en) * 1975-08-18 1977-08-02 Allied Chemical Corporation Control of a steam-heating power plant
JPS5928163Y2 (ja) * 1975-11-04 1984-08-15 日産自動車株式会社 蒸気発生器の燃料制御装置
US4064699A (en) * 1976-09-03 1977-12-27 Westinghouse Electric Corporation Boiler control providing improved operation with fuels having variable heating values
JPH0633766B2 (ja) * 1984-01-13 1994-05-02 株式会社東芝 動力装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136642A (en) * 1976-10-13 1979-01-30 Ckd Dukla, Narodni Podnik Method of and apparatus for regulating steam and hot water boilers employing fluidized fuel
US4072130A (en) * 1976-12-01 1978-02-07 The Ducon Company, Inc. Apparatus and method for generating steam
EP0068301A1 (fr) * 1981-07-01 1983-01-05 Deutsche Babcock Anlagen Aktiengesellschaft Générateur de vapeur avec foyer à lit fluidisé circulant, à pression atmosphérique ou suralimenté
WO1983003294A1 (fr) * 1982-03-15 1983-09-29 STRÖMBERG, Lars, Ake Chaudiere rapide a lit fluidifie et procede de commande de la chaudiere
US4453495A (en) * 1983-03-23 1984-06-12 Electrodyne Research Corporation Integrated control for a steam generator circulating fluidized bed firing system
EP0156703A1 (fr) * 1984-03-08 1985-10-02 Framatome Procédé et appareillage de contrôle du transfert thermique réalisé dans un lit fluidisé

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0444926A2 (fr) * 1990-03-01 1991-09-04 Foster Wheeler Energy Corporation Combustion à lit fluidisÀ© avec un échangeur de chaleur intégré de recirculation avec des chambres d'entrée et de sortie
EP0444926A3 (en) * 1990-03-01 1992-06-03 Foster Wheeler Energy Corporation Fluidized bed combustion system and method having an integral recycle heat exchanger with inlet and outlet chambers
WO1995000804A1 (fr) * 1993-06-24 1995-01-05 A. Ahlstrom Corporation Procede de traitement de matieres solides a des temperatures elevees

Also Published As

Publication number Publication date
ATE63626T1 (de) 1991-06-15
ZA89225B (en) 1990-09-26
DE3862858D1 (de) 1991-06-20
US4884408A (en) 1989-12-05
JPH01219401A (ja) 1989-09-01
AU608112B2 (en) 1991-03-21
CA1326793C (fr) 1994-02-08
EP0324201B1 (fr) 1991-05-15
AU2847489A (en) 1989-07-20
DE3800863A1 (de) 1989-07-27
ES2022606B3 (es) 1991-12-01

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