EP0199251B1 - Abhitzedampferzeuger - Google Patents

Abhitzedampferzeuger Download PDF

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Publication number
EP0199251B1
EP0199251B1 EP86105132A EP86105132A EP0199251B1 EP 0199251 B1 EP0199251 B1 EP 0199251B1 EP 86105132 A EP86105132 A EP 86105132A EP 86105132 A EP86105132 A EP 86105132A EP 0199251 B1 EP0199251 B1 EP 0199251B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
steam generator
generator according
waste heat
supply line
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
EP86105132A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0199251A1 (de
Inventor
Hermann Brückner
Winfried Dipl.-Ing. Ganzer
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.)
Siemens AG
Original Assignee
Siemens 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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0199251A1 publication Critical patent/EP0199251A1/de
Application granted granted Critical
Publication of EP0199251B1 publication Critical patent/EP0199251B1/de
Expired 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
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1838—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines the hot gas being under a high pressure, e.g. in chemical installations
    • F22B1/1846—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines the hot gas being under a high pressure, e.g. in chemical installations the hot gas being loaded with particles, e.g. waste heat boilers after a coal gasification plant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/02—Steam boilers of forced-flow type of forced-circulation type

Definitions

  • the invention relates to a heat recovery steam generator for hot, dust-laden, pressurized gases with a so-called heat exchanger space, which is arranged concentrically in a pressure vessel and is open at the lower end and carries the heat exchanger elements, with a gas supply line opening into the heat exchanger space, with a pressure vessel wall connected gas exhaust line and with heat exchanger elements through which a cooling medium flows
  • Heat recovery steam generators are known. They are used particularly in gas and steam turbine power plants. They serve to use the heat content of the hot exhaust gases of the gas turbine to generate additional live steam. They generally consist of a cylindrical or rectangular chimney-like structure in which the hot exhaust gases flow through the heat exchanger tubes of the convection heating surfaces of the final superheaters, reheaters, evaporators and economizers one after the other from bottom to top.
  • Such heat recovery steam generators are also used behind reduction systems and in chemical processes for heat recovery.
  • waste heat steam generators which are arranged behind combustion layers, it is also known to allow the combustion gases to flow into the waste heat boiler from top to bottom and to arrange the heat exchanger heating surfaces in reverse order (cf. fuel-thermal power 35, 1983, No. 11, pages 465 to 470, as well as issue No. 12, pages 499 to 504).
  • GB 653 540 discloses a heat exchanger in which the hot gas supply line opens into a heat exchanger space which is arranged concentrically in a pressure vessel and is open at the lower end and carries the heat exchanger elements, in which the gas discharge line is connected to the pressure vessel wall and with the space between the surrounding walls of the heat exchanger space and the pressure vessel is connected. But it is a peculiarity of this steam generator that it can only be used for dust-free gases, because otherwise the lower callot would clog and block the further gas flow. The necessary cooling of the gas supply line also leads to a reduction in the overall efficiency.
  • the invention has for its object to provide a waste heat steam generator for hot, dust-laden and at the same time pressurized gases, which works with the greatest possible efficiency, is inexpensive to manufacture and requires little space.
  • the full gas pressure can be absorbed by the cooler outer walls of the pressure vessel.
  • the peripheral walls of the heat exchanger space exposed to the hot gas flow need only absorb the pressure difference between the inflowing hot gas and the outflowing cooled gas.
  • This pressure difference is of the order of a few meters of water and is essentially determined by the flow resistance that the heat exchanger elements offer to the gas flow. For a given temperature resistance of the material of the pressure vessel wall, this measure allows the gas inlet temperature to be driven upward.
  • this structure also ensures that the outer wall of the pressure vessel of the heat recovery steam generator only must be insulated against a temperature that is approximately between 100 ° and 250 °. In this way, the cost of thermal insulation is also reduced and the heat loss can be significantly reduced.
  • the connection of the gas supply line at the upper end of a heat exchanger space which is open at the bottom results in less susceptibility to contamination by the dust particles carried along.
  • the thermally highly stressed gas supply line can be largely relieved of pressure loads and at the same time the heat loss can be reduced by the fact that the thermal insulation must be matched to the much lower temperature of the gas discharge line.
  • the stability of the surrounding walls as well as the gas supply line can be increased significantly if they carry the heat exchanger tubes in an advantageous development of the invention.
  • the figure shows the structure of the heat recovery steam generator 3 according to the invention connected between a coal gasifier 1 and a gas cleaning system 2.
  • the gas feed line 4 coming from the coal gasifier 1 leads centrally from top to bottom in a heat exchanger space 6 arranged in a pressure vessel 5.
  • This heat exchanger space is open at the bottom and opens there into the pressure vessel 5.
  • the space between the peripheral walls of the heat exchanger space 6 and the outer wall of the pressure vessel is in turn connected at the upper end of the pressure vessel to a pressure-proof gas discharge line 8 enclosing the gas supply line 4.
  • a branch 9, which leads to the gas cleaning system 2 is located on this gas exhaust line directly in front of the coal gasifier 1.
  • the bottom 10 of the pressure container 5 is funnel-shaped and carries an ash discharge device 11 at its lowest point. This device consists of an ash lock 12 with two valves 13, 14 connected in series.
  • the peripheral walls of the heat exchanger space 6 are designed as fin tube walls.
  • the superheater, evaporator and economiser heating surfaces are suspended in the heat exchanger space 6 on support tubes 19, 20 (only two shown) which are passed through the above-mentioned heat exchanger surfaces and through which the circulating water flows.
  • these support tubes 19, 20 are connected in parallel to the fin tubes of the surrounding walls 7 of the heat exchanger space 6.
  • the wall of the gas supply line 4 is also designed as a fin tube wall. Your fin tubes are connected in series with those of the surrounding walls 7.
  • the heat exchanger tubes of the economizer heating surfaces 18, the evaporator heating surfaces 17 and the fin tubes of the gas supply line 4 are connected on the output side to a common water-steam separation vessel 21.
  • the heated water is conveyed via a circulation pump 22 into two strands 25, 26 which can be acted upon independently by means of control valves 23, 24.
  • the water is conveyed into the evaporator heating surfaces 17 via one of these two strands 25 and into the fin tubes of the surrounding walls 7 of the heat exchanger space 6 and the support tubes 19, 20 connected in parallel via the other of these two strands 26.
  • the water of the circulation line 26 leaving the heat exchanger tubes of the surrounding walls 7 and the support tubes 19, 20 is passed into the heat exchanger tubes of the gas supply line 4.
  • the steam side of the water vapor separation vessel 21 is connected to the superheater heating surfaces 15, 16 which are connected in series with one another.
  • An injection cooler 28 for regulating the temperature of the live steam leaving the last superheater 15 via the live steam line 29 is installed in the steam line 27 connecting the two superheater heating surfaces.
  • a feed water line 30 coming from the condenser (not shown further here) is connected via a feed water pump 31 to the input of the economizer 18.
  • the hot, dust-containing raw gas generated there flows via the gas feed line 4 from above into the heat exchanger space 6 of the heat recovery steam generator 3.
  • This gas has a temperature of about 1000 to 1400 ° C and due to the charging of the coal gasifier 1 a pressure of 10 to 60 bar. It is heavily loaded with dust particles. It flows through the two superheater heating surfaces 15, 16 in the heat exchanger space 6, then the evaporator heating surfaces 17 and finally the economizer heating surfaces 18 in order to flow into the pressure vessel 5 at the lower open end of the heat exchanger space 6, largely cooled, and to be deflected there by 180 °. Outside the peripheral walls 7 of the heat exchanger space 6, but within the pressure vessel 5, the cooled raw gas flows upwards again.
  • the dust particles are thrown by the deflection by 180 ° as well as by gravity into the ash funnel in the bottom 10 of the pressure vessel.
  • the ash can be removed there via the ash discharge device 11.
  • the gas which has been largely freed of ash and cooled to 150 to 400 ° C., now flows upwards in the pressure vessel 5 and almost back to the coal gasifier 1 via the gas discharge line 8 surrounding the gas supply line 4. Via the branch 9 in the gas exhaust line 8, it flows to the gas cleaning system 2. On this way back, it also cools the gas supply line 4 and supports it with its pressure, so that the gas supply line 4 only the differential pressure between those flowing into the heat recovery steam generator 3 and those leaving it Gas flow must take up.
  • Fresh feed water is fed into the economizer heating surfaces 18 through the feed water line 30 via the feed water pump 31.
  • the heated feed water leaving the economizer heating surfaces 18 is partly fed into the evaporator heating surfaces 17 via the water-steam separating vessel 21, the circulating pump 22 and, from there, mixed with steam and conveyed back into the water vapor separating vessel 21.
  • Parallel to the evaporator heating surfaces 17, part of the heated feed water is also conveyed into the heat exchanger tubes of the surrounding walls 7 of the heat exchanger chamber 6 and the gas supply line 4.
  • the steamed feed water is also conveyed into the water-steam separation vessel 21. There, the feed water separated from the steam is fed back to the circulation pump 22.
  • the steam passes from the water vapor separation vessel 21 into the two superheater heating surfaces 15, 16 connected in series. From the second superheater heating surface 15, the steam flows directly via the live steam line 29 to the consumer.
  • the quality of the live steam can also be regulated by the injection cooler 28 connected between the two superheater heating surfaces in the steam line.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Chimneys And Flues (AREA)
EP86105132A 1985-04-26 1986-04-14 Abhitzedampferzeuger Expired EP0199251B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853515174 DE3515174A1 (de) 1985-04-26 1985-04-26 Abhitzedampferzeuger
DE3515174 1985-04-26

Publications (2)

Publication Number Publication Date
EP0199251A1 EP0199251A1 (de) 1986-10-29
EP0199251B1 true EP0199251B1 (de) 1988-06-29

Family

ID=6269241

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105132A Expired EP0199251B1 (de) 1985-04-26 1986-04-14 Abhitzedampferzeuger

Country Status (5)

Country Link
US (1) US4738224A (enrdf_load_stackoverflow)
EP (1) EP0199251B1 (enrdf_load_stackoverflow)
AU (1) AU583614B2 (enrdf_load_stackoverflow)
DE (2) DE3515174A1 (enrdf_load_stackoverflow)
IN (1) IN163199B (enrdf_load_stackoverflow)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1312292C (en) * 1987-04-06 1993-01-05 Daniel Dupuis Filtering bag and filter
JP2554101B2 (ja) * 1987-09-28 1996-11-13 三菱重工業株式会社 排ガスボイラ
US5311844A (en) * 1992-03-27 1994-05-17 Foster Wheeler Energy Corporation Internested superheater and reheater tube arrangement for heat recovery steam generator
JP3017623B2 (ja) * 1993-09-28 2000-03-13 株式会社日立製作所 石炭ガス化装置
US5921285A (en) * 1995-09-28 1999-07-13 Fiberspar Spoolable Products, Inc. Composite spoolable tube
DE19651678A1 (de) * 1996-12-12 1998-06-25 Siemens Ag Dampferzeuger
WO2001088435A1 (en) 2000-05-19 2001-11-22 Shell Internationale Research Maatschappij B.V. Process for heating steam
WO2002093073A2 (en) 2001-05-17 2002-11-21 Shell Internationale Research Maatschappij B.V. Apparatus and process for heating steam
US7878157B2 (en) * 2004-09-23 2011-02-01 Siemens Aktiengesellschaft Fossil-fuel heated continuous steam generator
CN101135432B (zh) * 2006-09-01 2013-04-24 巴布考克及威尔考克斯公司 用于容纳和冷却合成气体的蒸汽发生器
KR100860493B1 (ko) * 2008-06-09 2008-09-26 정재억 냉각 탈진 장치
DE102013212286B4 (de) * 2013-06-26 2015-07-02 Lambion Energy Solutions Gmbh Anlage zur Energierückgewinnung aus heißen Gasen
US9429339B2 (en) * 2014-09-25 2016-08-30 Miclau—S.R.I. Inc. Domestic gas-fired water heater condensing flue system
JP6621310B2 (ja) * 2015-11-18 2019-12-18 三菱日立パワーシステムズ株式会社 ガス化装置、制御装置、ガス化複合発電設備及び制御方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2020686A (en) * 1935-11-12 Waste heat economizer
GB349345A (en) * 1930-06-24 1931-05-28 Howard John Fountain Improvements in steam generators and water heaters
CH200146A (de) * 1938-02-04 1938-09-30 Buss Ag Dampfkesselanlage.
US2547589A (en) * 1947-07-02 1951-04-03 Comb Eng Superheater Inc Apparatus for extracting heat from gases under pressure
GB653540A (en) * 1947-07-02 1951-05-16 Comb Eng Superheater Inc Improvements in steam boilers and like heat exchangers
GB772991A (en) * 1955-09-07 1957-04-17 La Mont Int Ass Ltd Improvements in and relating to forced recirculation steam generators
US3754533A (en) * 1971-11-24 1973-08-28 Babcock & Wilcox Ltd Tube support system
US4286528A (en) * 1979-08-30 1981-09-01 Stephen Willard Exhaust filter system
CA1142911A (en) * 1980-01-23 1983-03-15 Andrew F. Kwasnik, Jr. Steam generating heat exchanger
CH653360A5 (de) * 1980-09-19 1985-12-31 Sulzer Ag Heissgaskuehler an einer kohlevergasungsanlage.
CH656637A5 (de) * 1981-10-26 1986-07-15 Sulzer Ag Gaskuehler-anordnung zu kohlevergasungsanlage.
GB2115129B (en) * 1982-02-15 1984-10-31 Shell Int Research Process for the cooling of small particles-containing gases
DE3206511C2 (de) * 1982-02-24 1985-09-12 L. & C. Steinmüller GmbH, 5270 Gummersbach Abhitzekessel
NL187177C (nl) * 1982-07-12 1991-06-17 Stork Ketel & App Vertikale stralingsketel.
DE3248096C2 (de) * 1982-12-24 1985-01-31 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 4200 Oberhausen Stehende Vorrichtung zum Kühlen von unter hohem Druck stehenden Gasen mit hohem Staubanteil

Also Published As

Publication number Publication date
AU583614B2 (en) 1989-05-04
IN163199B (enrdf_load_stackoverflow) 1988-08-20
EP0199251A1 (de) 1986-10-29
DE3515174A1 (de) 1986-11-06
US4738224A (en) 1988-04-19
DE3660357D1 (en) 1988-08-04
AU5659786A (en) 1986-10-30

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