US20120325165A1 - Dual path parallel superheater - Google Patents

Dual path parallel superheater Download PDF

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Publication number
US20120325165A1
US20120325165A1 US13/528,208 US201213528208A US2012325165A1 US 20120325165 A1 US20120325165 A1 US 20120325165A1 US 201213528208 A US201213528208 A US 201213528208A US 2012325165 A1 US2012325165 A1 US 2012325165A1
Authority
US
United States
Prior art keywords
steam
path
drum
receiving apparatus
delivering
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.)
Abandoned
Application number
US13/528,208
Other languages
English (en)
Inventor
Timothy E. Hicks
Jeffrey J. Gries
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.)
Babcock and Wilcox Power Generation Group Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US13/528,208 priority Critical patent/US20120325165A1/en
Assigned to BABCOCK & WILCOX POWER GENERATION GROUP, INC. reassignment BABCOCK & WILCOX POWER GENERATION GROUP, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GRIES, JEFFREY J., HICKS, TIMOTHY E.
Priority to ARP120102228A priority patent/AR087939A1/es
Priority to AU2012381775A priority patent/AU2012381775B2/en
Priority to CN201280028529.3A priority patent/CN103748415A/zh
Priority to BR112013032674A priority patent/BR112013032674A2/pt
Priority to TW101122210A priority patent/TWI588412B/zh
Priority to JP2014527145A priority patent/JP5989118B2/ja
Priority to CA2840766A priority patent/CA2840766A1/en
Priority to NZ620193A priority patent/NZ620193B2/en
Assigned to BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT reassignment BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT NOTICE OF GRANT OF SECURITY INTEREST IN PATENTS Assignors: BABCOCK & WILCOX POWER GENERATION GROUP, INC.
Publication of US20120325165A1 publication Critical patent/US20120325165A1/en
Priority to ZA2013/09040A priority patent/ZA201309040B/en
Assigned to BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT reassignment BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BABCOCK & WILCOX POWER GENERATION GROUP, INC. (TO BE RENAMED THE BABCOCK AND WILCOX COMPANY)
Assigned to DIAMOND POWER INTERNATIONAL, LLC (F/K/A DIAMOND POWER INTERNATIONAL, INC.), MEGTEC TURBOSONIC TECHNOLOGIES, INC., SOFCO-EFS HOLDINGS LLC, Babcock & Wilcox SPIG, Inc., THE BABCOCK & WILCOX COMPANY (F/K/A BABCOCK & WILCOX POWER GENERATION GROUP, INC.), BABCOCK & WILCOX TECHNOLOGY, LLC (F/K/A MCDERMOTT TECHNOLOGY, INC.), BABCOCK & WILCOX MEGTEC, LLC reassignment DIAMOND POWER INTERNATIONAL, LLC (F/K/A DIAMOND POWER INTERNATIONAL, INC.) RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BANK OF AMERICA, N.A.
Abandoned 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
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G5/00—Controlling superheat temperature
    • F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G5/00—Controlling superheat temperature
    • F22G5/20—Controlling superheat temperature by combined controlling procedures

Definitions

  • the present invention relates generally to methods and devices for effectively increasing the delivery of steam in a controlled and efficient manner.
  • FIG. 1 hereof shows a typical prior art arrangement 10 for a single-path series superheater, in a new surface 12 is added to an existing surface 14 to process the increased capacity.
  • Table 1 predicted steam temperatures and pressures at the locations as defined by FIG. 1 .
  • Desired outlet pressure is 1300 psig and desired outlet temperature is 900° F.
  • the present invention is drawn to a dual-path parallel superheater includes a drum for delivering steam, a steam receiving apparatus opposite the drum for receiving steam, a first surface and a second which receive steam from the drum to provide first and second paths for superheating the steam before delivering it to the steam receiving apparatus. There are also spray attemperators along the first and second paths.
  • the present invention is a system and method in which steam is divided into two paths at the drum outlet.
  • One path is defined by existing superheater surface and the other by new surface overhanging the furnace.
  • Each path is independently controlled with spray attemperation and independently achieves full steam temperature.
  • the streams are re-combined to a single path at the superheater outlet.
  • the present dual-path parallel superheater (“DPPS”) allows for an increased steaming rate without requiring the replacement of the existing superheater.
  • FIG. 1 is a schematic view of a prior art single path series superheater
  • FIG. 2 is a schematic view of the present dual path parallel superheater.
  • FIG. 2 shows the dual path parallel superheater (“DPPS”) according to the present invention, the superheater arranged such that there are two parallel paths by which steam becomes superheated.
  • FIG. 2 shows the DPPS arrangement, in which a new surface 22 is added to the original surface 24 to process increased capacity.
  • a drum 30 for delivering steam to surfaces 22 and 24 and a steam receiving apparatus 32 such as a turbine for ultimately receiving steam from surfaces 22 and 24 .
  • Table 2 below shows predicted steam temperatures and pressures at the locations A1-A4 and B1-B4, defined in FIG. 2 .
  • Desired outlet pressure is 1300 psig and desired outlet temperature is 900° F.
  • FIG. 2 reflects two paths: Path A, marked by locations A1-A4, and Path B, marked by locations B1-B4. To control steam temperature, each path has a spray attemperator 26 , 28 at one interstage location.
  • Path A including locations A1-A4, is arranged in a side by side orientation in order to utilize interstage spray 26 while only requiring that one new bank be installed.
  • the interstage spray attemperator 26 is located between positions A2 and A3. The attemperator 26 controls steam temperature and combats high metal temperatures inherent to low steam flow.
  • the tubes in the Path A bank may be made of a steel compound such as SA213-T22, a plurality of rows of stainless steel tubes may be employed in the outlet legs. Additionally, the side by side design of the present invention minimizes the amount of new heating surface required because hot steam is reintroduced to the front of the furnace, where the flue gas is hottest.
  • Path B including locations B1-B4, reuses the unit's existing superheater surface and existing interstage spray 28 location between positions B2 and B3.
  • the interstage spray 28 controls steam temperature and combats high metal temperatures inherent to low steam flow.
  • metals in the Path B banks may be made of materials well-known to those of skill in the art. The exception is the outlet rows of the Path B primary superheater: These rows generally require replacement with stainless steel tubes.
  • Path A and Path B achieve full steam temperature independently.
  • Path A has 41° F. of spray margin and Path B has a 61° F. of spray margin.
  • steam from Path A and Path B recombine to form a single outlet.
  • the parallel paths A and B are designed for the same pressure drop. This can be accomplished initially by under drilling headers in the new surface or installing orificed Dutchman in the existing surface. Under drilling headers and the installation of orificed Dutchmen are techniques known to those of skill in the art. However, as the unit becomes dirty, and spray flow changes, the pressure loss in each line may change. As a means of control, a trim valve may be installed in at least one of the lines. With the ability to dynamically adjust pressure drop, steam flow is enabled to remain as designed in each path. Thereby, steam temperature and pressure can also be maintained as designed.
  • the present invention offers numerous advantages.
  • the present invention is for industrial boilers undergoing capacity increases.
  • steaming rate increases the amount of pressure drop between the drum and superheater outlet increases. If the newly-desired steaming rate is high enough, a new superheater with additional flow paths is required to maintain outlet pressure. A new surface is required regardless of the existing superheater condition. As a result, operators are often forced to scrap tubes before they reach end-of-life, or, abandon their projects all together due to high project costs.
  • the present DPPS allows for increased steam flow without replacing existing surface.
  • the present invention provides cost savings to operators through the re-use of the existing surface.
  • the present invention allows satisfaction of an increased steam demand at a lower cost than traditional solutions.
  • the present invention may be applied to many surface different arrangements, offering flexibility in its application.
  • the present DPPS arrangement may be applied to several boiler types, including but not limited to, process recovery in the paper industry, stirling power boilers, waste-to-energy applications, and biomass combustion technologies.
  • the DPPS design provides ability to re-use existing superheater surface without lowering outlet pressure; ability to reach full steam temperature with less heating surface than prior art designs; and ability to control pressure drop across each steam path.
  • Alternative methods for processing an increased flow condition include allowing outlet pressure to decrease and removing the existing superheater (tubes, headers, roof seals, etc.) and installing new surface with additional parallel flow paths.
  • all or a portion of capacity increases may be derived from increases in operating temperature.
  • the method described herein may further be used to maintain a desired pressure drop while maintaining a desired superheater outlet temperature. While specific embodiments and/or details of the invention have been shown and described above to illustrate the application of the principles of the invention, it is understood that this invention may be embodied as more fully described in the claims, or as otherwise known by those skilled in the art, including any and all equivalents, without departing from such principles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Control Of Turbines (AREA)
US13/528,208 2011-06-21 2012-06-20 Dual path parallel superheater Abandoned US20120325165A1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US13/528,208 US20120325165A1 (en) 2011-06-21 2012-06-20 Dual path parallel superheater
NZ620193A NZ620193B2 (en) 2011-06-21 2012-06-21 Dual path parallel superheater
TW101122210A TWI588412B (zh) 2011-06-21 2012-06-21 雙路徑平行過熱器
CA2840766A CA2840766A1 (en) 2011-06-21 2012-06-21 Dual path paralell superheater
AU2012381775A AU2012381775B2 (en) 2011-06-21 2012-06-21 Dual path parallel superheater
CN201280028529.3A CN103748415A (zh) 2011-06-21 2012-06-21 双通路平行过热器
BR112013032674A BR112013032674A2 (pt) 2011-06-21 2012-06-21 superaquecimento paralelo de duplo percurso
ARP120102228A AR087939A1 (es) 2011-06-21 2012-06-21 Recalentador paralelo de dos vias
JP2014527145A JP5989118B2 (ja) 2011-06-21 2012-06-21 二重経路型の平行過熱器
ZA2013/09040A ZA201309040B (en) 2011-06-21 2013-12-02 Dual path paralell superheater

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161499253P 2011-06-21 2011-06-21
US13/528,208 US20120325165A1 (en) 2011-06-21 2012-06-20 Dual path parallel superheater

Publications (1)

Publication Number Publication Date
US20120325165A1 true US20120325165A1 (en) 2012-12-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
US13/528,208 Abandoned US20120325165A1 (en) 2011-06-21 2012-06-20 Dual path parallel superheater

Country Status (15)

Country Link
US (1) US20120325165A1 (ja)
EP (1) EP2734786A4 (ja)
JP (1) JP5989118B2 (ja)
KR (1) KR20140096998A (ja)
CN (1) CN103748415A (ja)
AR (1) AR087939A1 (ja)
AU (1) AU2012381775B2 (ja)
BR (1) BR112013032674A2 (ja)
CA (1) CA2840766A1 (ja)
CL (1) CL2013003631A1 (ja)
MX (1) MX2013014909A (ja)
RU (1) RU2013154306A (ja)
TW (1) TWI588412B (ja)
WO (1) WO2014018000A1 (ja)
ZA (1) ZA201309040B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150059732A1 (en) * 2011-11-10 2015-03-05 A.O. Smith Corporation Thermostatic condensing gas water heater and control method therefor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120325165A1 (en) * 2011-06-21 2012-12-27 Hicks Timothy E Dual path parallel superheater

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2669977A (en) * 1951-08-21 1954-02-23 Bailey Meter Co Vapor generator operation
US3139869A (en) * 1961-08-25 1964-07-07 Babcock & Wilcox Co Method of regulating vapor temperature
US4485803A (en) * 1982-10-14 1984-12-04 The Babcock & Wilcox Company Solar receiver with interspersed panels
US4887431A (en) * 1989-04-05 1989-12-19 The Babcock & Wilcox Company Superheater outlet steam temperature control
US5065815A (en) * 1989-10-27 1991-11-19 Man Gutehoffnungshutte Aktiengesellschaft Force free suspension of heat exchange bundles with high temperature admission flow
DE4117796A1 (de) * 1991-05-30 1993-01-21 Ver Energiewerke Ag Verfahren zur dampftemperaturregelung an ueberhitzern von dampfanlagen
US5632143A (en) * 1994-06-14 1997-05-27 Ormat Industries Ltd. Gas turbine system and method using temperature control of the exhaust gas entering the heat recovery cycle by mixing with ambient air
US20080060795A1 (en) * 2004-09-15 2008-03-13 Nomura Reinetsu Yugengaisha Heat Exchanging Apparatus and Superheated Steam Generating Apparatus Using the Same

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US2985153A (en) * 1951-12-07 1961-05-23 Bailey Meter Co Vapor generation and superheating
US3139068A (en) * 1960-11-21 1964-06-30 Combustion Eng High temperature high pressure steam generator
US3205870A (en) * 1964-03-17 1965-09-14 Babcock & Wilcox Co Control system for steam generators
DE3509637A1 (de) * 1985-03-16 1986-09-18 Kraftwerk Union AG, 4330 Mülheim Dampferzeuger mit einem temperaturgeregelten parallelrohrsystem
JPH0718525B2 (ja) * 1987-05-06 1995-03-06 株式会社日立製作所 排ガスボイラ
DE4025527C1 (en) * 1990-08-11 1992-01-16 Deutsche Babcock Energie- Und Umwelttechnik Ag, 4200 Oberhausen, De Steam boiler with economiser - incorporates combustion chamber with recirculation circuit
JPH05280705A (ja) * 1992-03-31 1993-10-26 Mitsubishi Materials Corp 銅製錬炉における排熱回収装置
JP3190939B2 (ja) * 1992-11-16 2001-07-23 バブコック日立株式会社 蒸気発生装置
JP3758213B2 (ja) * 1995-08-29 2006-03-22 石川島播磨重工業株式会社 ボイラ吊下形放射過熱器の管寄構造
US7387090B2 (en) * 2005-12-23 2008-06-17 Russoniello Fabio M Method for control of steam quality on multipath steam generator
DE102007052234A1 (de) * 2007-10-22 2009-04-23 Deutsches Zentrum für Luft- und Raumfahrt e.V. Verfahren zum Betreiben eines solarthermischen Kraftwerks und solarthermisches Kraftwerk
US8904972B2 (en) * 2008-09-29 2014-12-09 General Electric Company Inter-stage attemperation system and method
US20120325165A1 (en) * 2011-06-21 2012-12-27 Hicks Timothy E Dual path parallel superheater

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2669977A (en) * 1951-08-21 1954-02-23 Bailey Meter Co Vapor generator operation
US3139869A (en) * 1961-08-25 1964-07-07 Babcock & Wilcox Co Method of regulating vapor temperature
US4485803A (en) * 1982-10-14 1984-12-04 The Babcock & Wilcox Company Solar receiver with interspersed panels
US4887431A (en) * 1989-04-05 1989-12-19 The Babcock & Wilcox Company Superheater outlet steam temperature control
US5065815A (en) * 1989-10-27 1991-11-19 Man Gutehoffnungshutte Aktiengesellschaft Force free suspension of heat exchange bundles with high temperature admission flow
DE4117796A1 (de) * 1991-05-30 1993-01-21 Ver Energiewerke Ag Verfahren zur dampftemperaturregelung an ueberhitzern von dampfanlagen
US5632143A (en) * 1994-06-14 1997-05-27 Ormat Industries Ltd. Gas turbine system and method using temperature control of the exhaust gas entering the heat recovery cycle by mixing with ambient air
US20080060795A1 (en) * 2004-09-15 2008-03-13 Nomura Reinetsu Yugengaisha Heat Exchanging Apparatus and Superheated Steam Generating Apparatus Using the Same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150059732A1 (en) * 2011-11-10 2015-03-05 A.O. Smith Corporation Thermostatic condensing gas water heater and control method therefor
US9939172B2 (en) * 2011-11-10 2018-04-10 A. O. Smith Corporation Thermostatic condensing gas water heater and control method therefor

Also Published As

Publication number Publication date
RU2013154306A (ru) 2015-06-20
CA2840766A1 (en) 2012-12-21
EP2734786A4 (en) 2015-03-18
ZA201309040B (en) 2014-08-27
EP2734786A1 (en) 2014-05-28
MX2013014909A (es) 2014-10-02
NZ620193A (en) 2015-10-30
KR20140096998A (ko) 2014-08-06
TWI588412B (zh) 2017-06-21
JP5989118B2 (ja) 2016-09-07
AR087939A1 (es) 2014-04-30
AU2012381775B2 (en) 2017-03-02
TW201319468A (zh) 2013-05-16
CL2013003631A1 (es) 2014-08-08
BR112013032674A2 (pt) 2020-01-14
AU2012381775A1 (en) 2014-02-20
CN103748415A (zh) 2014-04-23
WO2014018000A1 (en) 2014-01-30
JP2014527152A (ja) 2014-10-09

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