GB2296964A - Steam generator - Google Patents

Steam generator Download PDF

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Publication number
GB2296964A
GB2296964A GB9500658A GB9500658A GB2296964A GB 2296964 A GB2296964 A GB 2296964A GB 9500658 A GB9500658 A GB 9500658A GB 9500658 A GB9500658 A GB 9500658A GB 2296964 A GB2296964 A GB 2296964A
Authority
GB
United Kingdom
Prior art keywords
evaporator
installation
unit
evaporator unit
conduit
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
GB9500658A
Other versions
GB2296964B (en
GB9500658D0 (en
GB2296964A8 (en
GB2296964A9 (en
Inventor
Manen Antonie Van
Hubert Francesco Ratering
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.)
Stork Ketels BV
Original Assignee
Stork Ketels BV
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 Stork Ketels BV filed Critical Stork Ketels BV
Priority to GB9500658A priority Critical patent/GB2296964B/en
Publication of GB9500658D0 publication Critical patent/GB9500658D0/en
Publication of GB2296964A publication Critical patent/GB2296964A/en
Publication of GB2296964A8 publication Critical patent/GB2296964A8/en
Publication of GB2296964A9 publication Critical patent/GB2296964A9/en
Application granted granted Critical
Publication of GB2296964B publication Critical patent/GB2296964B/en
Priority to HK98115861A priority patent/HK1014572A1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • F22B1/1807—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 using the exhaust gases of combustion engines
    • F22B1/1815—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 using the exhaust gases of combustion engines using the exhaust gases of gas-turbines

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Abstract

A steam generator for example using waste heat from a gas turbine exhaust 2, has an upright evaporator boiler 4 with evaporator tubes 19 having substantial horizontal portions. In order to ensure correct circulation on start-up, without the need for a pump, at least one evaporator tube 19 has upright riser portions each of which extends over 1/15 to 1/3 of the height of the evaporator. The upright portions may lie outside the boiler.

Description

1 INSTALLATION FOR GENERATING STEAM 2296964 The present invention relates
to an installation for generating steam, comprising a standing evaporator boiler with an evaporator unit provided with substantially horizontal evaporator conduits, which evaporator unit is connected to a tank for separating steam and water and forms with the tank a water circuit.
such an installation is used for instance for generating steam, by heat extracted from exhaust gases from a gas turbine.
Such an installation requires the use of means for initiating the water circulation in the evaporator unit during start-up ef the steam generating process, particularly with a cold start. If the water circulation is not initiated adequately, problems can occur as a result of the occurrence of a steam bubble in the lower part of the evaporator unit.
- The European patent application EP-A-357 590 describes a number of rrovisi.ons which are included in the water-steam circuit between evaporator unit and separation tank in order to avoid the firing problems. These provisions comprise inter alia liquid injectors in the descending or ascending portion of the water part of the water-steam circuit and/or circulation pumps.
The present invention has for its object to provide an installation of the type stated in the preamble wherein firing problems are avoided as far as possible, while the above mentioned provisions for initiating the water circulation can be dispensed with.
This is ac-ieved according to the invention in that the evaporator unit comprises at least one evaporator conduit, whereof a standitna,i.e. rising, e.g. substantially vertical, evaporator conduit part extends over a considerable part of the height of the evaporator unit.
By making.:se of at least one evaporator conduit with a standing evaporatsr conduit part extending over a 2 considerable part of the height of the evaporator unit the steam entering therein will rise and thereby initiate the circulation.
An evaporator conduit part extends according to the inv_enLion over a considerable part of the evaporator unit when this height is equal to at least two, -preferably three or more, such as five pitch distances, of pipes which run meandering upward through the evaporator boiler in the direction of the heating medium.
10--- when the standing evaporator conduit part extends over the whole height of the evaporator unit the effect of the forming steam in initiating the water circulation will be maximalized.
If in further preference the standing evaporator conduit part connects directly onto an outlet of the evaporator unit the initiating of the circulatibn will be maximal because the circulation initiated in that part of the evaporator conduit leaves the evaporator unit immediately in the direction of the separating tank.
The standing evaporator conduit part can be located not only in the heating exhaust gases flow but also inside the evaporator boiler outside the exhaust gases flow. In order to achieve the effect according to the invention it is also possible for the standing evaporator conduit part to be located partially or wholly outside the evaporator boiler. To achieve the effect according to the invention it is in any case only necessary for steam bubbles to reach the standing evaporator conduit part, so that the circulation is initiated as a result of the positive hydrostatic pressure difference between the supply conduits to the evaporator unit and the standing evaporator conduit part. According to another embodiment the fraction lies between 1/3 and 1/15.
In order to avoid initiation of the water circulation taking place in a jerky manner it is recommended that a fraction of tAe evaporator conduits is provided with the evaporator conduit part extending over a considerable part of the height of the evaporator unit. The circulation will thus be initiated in cne or in a limited number of the evaporator conduits.
3 The fraction lies for insLance between 1/3 and 1/15.
Another aspect of the present invention relates to an evaporator unit provided with at least one evaporator conduit with an evaporator conduit part extending over a considerable 5 part of the height of the evaporator unit.
Mentioned and other features of Lhe installation for generating steam according to the invention will be further elucidated hereinafter on the basis of a number of embodiments which are only given by wa y of example without the invention being deemed as limited thereto, while reference is made to the annexed drawing.
In the drawing:
figure I is a schematic broken away perspective view of an installation according to the invenLion for generating steam; figures 2 and 3 each show another configuration of an evaporator unit according to the invention; and figure 4 is a perspective view of another evaporator unit.
Figure 1 shows an installation 1 according to the invention for generating steam from exhaust gas coming from a gas turbine (not shown) which enters via an inlet 2 and exits via an outlet 3. The installation 1 comprises a vertical evaporator boiler 4, in which the gas flow is oriented in substantially upright (vertical) direction, and comprises an evaporator unit 5 according to the invenLion.
The evaporator unit 5 comprises an inlet 7 and an outlet 8 which form a water circuit together with a tank 9 for separating water 10 and steam.
A feed water line 12 provided with a pump 11 is connected onto the tank 9. on the water side the tank 9 is connected via a conduit 13 to inlet 7 and on the steam side is connected via the conduit 14 and/or 15 to outlet 8.
The evaporator unit 5 comprises a number of evaporator canduits 19 which are connected to a feed conduit 18 and which are each provided with an evaporator conduit part 20, 21 extending over a considerable part of the height of evaporator unit 55 - 4 At start-up of installation 5 when exhaust gas is supplied via inlet 2, steam generated in the parts 20 and 21 will initiate the circulation in the circuit between the evaporator unit 5 and the tank 9 via the conduits 13 and 8.
Figure 2 shows another embodiment of the evaporator 5 of figure 1. In this case the evaporator unit 22 comprises a number of conduits 23-26 which extend over increasingly larger parts of the height of the evaporator unit.
Particularly in the parts 27, 28 and 29 of conduits 24, 25 and 26 respectively the circul-ation of the steam present therein will be initiated increasingly better.
Figure 3 shows an evaporator unit 30 according to the invention which comprises two evaporator conduits 31 and 32 having parts 33 and 34 respectively which extend practically over the whole height of the evaporator unit 30 and which connect directly onto the outlet 8 of evaporator unit 30 and are located wholly outside the evaporator boiler 4.
Figure 4 shows an evaporator boiler 4 with an evaporator unit 35 comprising a number of evaporator conduits 36, 37 which are bent in conventional manner and which extend between the feed conduit 18 and the outlet 8.
The evaporator unit 35 further comprises an evaporator conduit 38 which is provided with a part 39 extending practically over the whole height of the evaporator unit 35.
It will be apparent that this conduit part 39 can assume a sloping or standing position but also a practically or wholly vertical position. All that is important is that the evaporator conduit 39 rises to the level of the outlet 8.
Finally, this evaporator conduit part 39 can be located wholly or partially inside or outside the evaporator boiler 4.
In the evaporator unit 22 of figure 2 the fraction of the evaporator c=duits with a part of the evaporator conduits extending over a considerable part of the height amounts to about -/3. In the evaporator unit 30 according figure 3 such a fraction amounts to about 2/11.
Ir

Claims (9)

Claims
1. Installation for generating steam, comprising a standing evaporator boiler with an evaporator unit provided with substantially horizontal evaporator conduits, which evaporator unit is connected to a tank for separating steam and water and forms with the tank a water circuit, characterized in that the evaporator unit comprises at least one evaporator conduit, whereof a rising evaporator conduit part extends over a considerable part of the height of the evaporator unit.
2. Installation as claimed in claim 1, wherein the rising evaporator conduit part extends over the whole height of the evaporator unit.
3. Installation as claimed in claim 1 or 2, wherein the rising evaporator conduit part connects directly onto an outlet of the evaporator unit.
4. Installation as claimed in any of claims 1 to 3, wherein at least a portion of the rising evaporator conduit part is located outside the evaporator boiler.
5. Installation as claimed in claim 4, wherein the rising evaporator conduit part is located wholly outside the evaporator boiler.
6. Installation as claimed in any of claims 1 to 5, wherein a fraction of the evaporator conduits is provided with the evaporator conduit part extending over a considerable part of the height of the evaporator unit.
7. Installaticn as claimed in claim 6, wherein the fraction lies between 1/3 and 1/15.
8. Evaporator unit for an installation as claimed in any of claims 1 to 7, provided with at least one evaporator conduit with an evaporator conduit part extending over a considerable part of the height of the evaporator unit.
6
9. Installation for generating steam substantially as described with reference to any of the figures of the drawings.
GB9500658A 1995-01-13 1995-01-13 Installation for generating steam Expired - Fee Related GB2296964B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9500658A GB2296964B (en) 1995-01-13 1995-01-13 Installation for generating steam
HK98115861A HK1014572A1 (en) 1995-01-13 1998-12-28 Installation for generating steam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9500658A GB2296964B (en) 1995-01-13 1995-01-13 Installation for generating steam

Publications (5)

Publication Number Publication Date
GB9500658D0 GB9500658D0 (en) 1995-03-08
GB2296964A true GB2296964A (en) 1996-07-17
GB2296964A8 GB2296964A8 (en) 1996-07-21
GB2296964A9 GB2296964A9 (en) 1996-07-21
GB2296964B GB2296964B (en) 1998-12-16

Family

ID=10767986

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9500658A Expired - Fee Related GB2296964B (en) 1995-01-13 1995-01-13 Installation for generating steam

Country Status (2)

Country Link
GB (1) GB2296964B (en)
HK (1) HK1014572A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0764813A1 (en) * 1995-09-20 1997-03-26 Nem B.V. Waste heat boiler, particularly for use after a gas turbine
ES2122842A1 (en) * 1995-01-19 1998-12-16 Stork Ketels Bv Installation for generating steam (vapour)
AU2002300240B2 (en) * 2002-01-16 2005-06-30 Johann Granitzer Furnace Configurations
AU2006200739B2 (en) * 2002-07-22 2011-03-03 Johann Granitzer Furnace arrangements
ITMI20110244A1 (en) * 2011-02-18 2012-08-19 Exergy Orc S R L PLANT AND PROCESS FOR ENERGY PRODUCTION THROUGH ORGANIC CYCLE RANKINE
EP2944873A4 (en) * 2013-01-10 2016-01-20 Panasonic Ip Man Co Ltd Rankine cycle device and cogeneration system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB913010A (en) * 1958-10-14 1962-12-12 Heinrich Vorkauf Improvements in and relating to heat exchangers
GB1141466A (en) * 1965-02-25 1969-01-29 Yarrow & Company Ltd Steam generator
GB1448652A (en) * 1974-01-15 1976-09-08 Sulzer Ag Combined gas turbine and steam power plants
GB1471155A (en) * 1973-10-24 1977-04-21 Foster Wheeler Power Prod Heat exchangers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB600793A (en) * 1945-08-17 1948-04-19 Karl Folke Nordlund Steam generator
GB813243A (en) * 1954-12-17 1959-05-13 Foster Wheeler Ltd Improvements in and relating to heat exchangers
GB347547A (en) * 1930-07-08 1931-04-30 Schmidt Sche Heissdampf Improvements in steam generators
GB396342A (en) * 1932-04-13 1933-08-03 Babcock & Wilcox Ltd Improvements in water-tube steam boilers
GB495114A (en) * 1936-05-28 1938-11-08 Babcock & Wilcox Ltd Improvements in water tube steam boilers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB913010A (en) * 1958-10-14 1962-12-12 Heinrich Vorkauf Improvements in and relating to heat exchangers
GB1141466A (en) * 1965-02-25 1969-01-29 Yarrow & Company Ltd Steam generator
GB1471155A (en) * 1973-10-24 1977-04-21 Foster Wheeler Power Prod Heat exchangers
GB1448652A (en) * 1974-01-15 1976-09-08 Sulzer Ag Combined gas turbine and steam power plants

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2122842A1 (en) * 1995-01-19 1998-12-16 Stork Ketels Bv Installation for generating steam (vapour)
EP0764813A1 (en) * 1995-09-20 1997-03-26 Nem B.V. Waste heat boiler, particularly for use after a gas turbine
AU2002300240B2 (en) * 2002-01-16 2005-06-30 Johann Granitzer Furnace Configurations
AU2006200739B2 (en) * 2002-07-22 2011-03-03 Johann Granitzer Furnace arrangements
AU2006200739B8 (en) * 2002-07-22 2011-04-07 Johann Granitzer Furnace arrangements
ITMI20110244A1 (en) * 2011-02-18 2012-08-19 Exergy Orc S R L PLANT AND PROCESS FOR ENERGY PRODUCTION THROUGH ORGANIC CYCLE RANKINE
WO2012110905A1 (en) * 2011-02-18 2012-08-23 Exergy Orc S.R.L. Apparatus and process for generation of energy by organic rankine cycle
EP2944873A4 (en) * 2013-01-10 2016-01-20 Panasonic Ip Man Co Ltd Rankine cycle device and cogeneration system
US9638066B2 (en) 2013-01-10 2017-05-02 Panasonic Intellectual Property Management Co., Ltd. Rankine cycle apparatus and combined heat and power system

Also Published As

Publication number Publication date
GB2296964B (en) 1998-12-16
HK1014572A1 (en) 1999-09-30
GB9500658D0 (en) 1995-03-08
GB2296964A8 (en) 1996-07-21
GB2296964A9 (en) 1996-07-21

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020113