EP3828464A1 - Wärmerückgewinnungskessel und anlage mit diesem wärmerückgewinnungskessel - Google Patents

Wärmerückgewinnungskessel und anlage mit diesem wärmerückgewinnungskessel Download PDF

Info

Publication number: EP3828464A1
Authority: EP; European Patent Office
Prior art keywords: bulge; flue; gases; inlet; boiler according
Prior art date: 2019-11-28
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

EP20210469.1A

Other languages

English (en)

French (fr)

Other versions

EP3828464C0 (de

EP3828464B1 (de

Inventor

Vincenzo PANEBIANCO

Ruggiero DADDUZIO

Daniele CROCIATI

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.)

AC Boilers SpA

Original Assignee

AC Boilers SpA

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.)

2019-11-28

Filing date

2020-11-27

Publication date

2021-06-02

2020-11-27 Application filed by AC Boilers SpA filed Critical AC Boilers SpA

2021-06-02 Publication of EP3828464A1 publication Critical patent/EP3828464A1/de

2024-02-14 Application granted granted Critical

2024-02-14 Publication of EP3828464C0 publication Critical patent/EP3828464C0/de

2024-02-14 Publication of EP3828464B1 publication Critical patent/EP3828464B1/de

Status Active legal-status Critical Current

2040-11-27 Anticipated expiration legal-status Critical

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Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/40—Arrangements of partition walls in flues of steam boilers, e.g. built-up from baffles

Definitions

the present invention relates to a heat recovery boiler and a plant comprising said heat recovery boiler.
the present invention relates to a heat recovery boiler configured to produce steam by using the heat lost by gas turbines and/or industrial processes.
the present invention also relates to a steam generation thermal plant comprising said heat recovery boiler.
Steam generation thermal plants normally comprise a heat recovery boiler, which is connected to a source of hot flue gases.
the source of hot flue gases may be a gas turbine or an industrial plant.
geometric-structural constraints prevent the connection between the heat recovery boiler and the hot flue-gases source from being substantially linear. In other words, it may happen that the hot flue-gases source is not aligned with the inlet of the heat recovery boiler.
Misalignment between the hot flue-gases source and the inlet of the heat recovery boiler causes non-homogeneity, in terms of temperature and speed, of the flue gases circulating in the boiler, with the creation of "hot” zones having a high concentration of hot flue gases and "cold” zones, where the concentration of hot flue gases is much lower.
the present invention relates to a heat recovery boiler comprising:
the presence of the bulge in the inlet diffuser allows the creation therein of at least one mixing zone capable of making the flow of flue gases flowing in the inlet diffuser uniform, in terms of speed and temperature. This brings about a significant reduction in the risk of cracks and an increase in boiler efficiency, especially when the boiler and the flue-gases source are not aligned.
the presence of the bulge allows the flue-gases source and the boiler inlet diffuser to be coupled in any way without affecting the reliability and efficiency of the boiler.
a further object of the present invention is to provide a steam generation plant as claimed in claim 15.
reference number 1 indicates a combined cycle plant for the production of energy.
the plant 1 is preferably only configured to produce electrical energy.
a variant not shown provides that the plant 1 is configured for the production of thermal energy useful, for example, in district heating applications.
the plant 1 comprises a gas turbine unit 2, a steam turbine unit 3, a boiler 4, and a tank 5.
the gas turbine unit 2 is the first engine of the combined cycle plant 1 and can be supplied with any fuel.
the gas turbine unit 2 is connected to a generator (not shown) and comprises a compressor 7, a combustion chamber 8, and a gas turbine 9.
the steam turbine unit 3 is coupled to a respective generator (not shown in the attached figures) and comprises a high-pressure steam turbine, a medium-pressure steam turbine, and a low-pressure steam turbine (not shown in the attached figures).
the boiler 4 recovers the residual heat of the combustion fumes generated by the gas turbine unit 2 and produces steam to be fed to the steam turbine unit 3.
the boiler 4 comprises a flue-gases flowing chamber 11, an inlet diffuser 12, and a steam circuit 14 and a chimney 15.
the flue-gases flowing chamber 11 extends along a longitudinal axis A and is provided with an inlet 16 and an outlet 17.
the flue-gases flowing chamber extends along an axis A which is arranged, in use, substantially horizontal.
the flue-gases flowing chamber can extend along an axis which is arranged, in use, substantially vertical.
the inlet diffuser 12 is connected to the inlet 16 of the flue-gases flowing chamber 11 and is fed with the flue gases from the gas turbine 9.
the flue gases flow into the inlet diffuser 12 and into the flue-gases flowing chamber 11 substantially in one advancing direction D.
the outlet 17 of the flue-gases flowing chamber 11 is connected to the chimney 15, through which the flue gases are discharged into the atmosphere.
the steam circuit 14 is schematically represented in Figure 1 . Basically, the steam circuit 14 is fed with water, preferably coming from the tank 5, and extends at least in part inside the flue-gases flowing chamber 11 so as to exploit the heat of the flue gases to generate steam.
the water in the tank 5 is preferably demineralized and is mostly water coming from a condenser (not shown) connected to the steam turbine unit 3.
the inlet diffuser 12 is provided with a bottom wall 19, a top wall 20, two side walls 22, a flue-gases inlet 23, and a flue-gases outlet 24.
bottom wall 19 and the top wall 20 can be inverted in configurations of the boiler 4 different from that of the non-limiting example described and illustrated herein (for example, with a vertical flue-gases flowing chamber).
the bottom wall 19 and the top wall 20 diverge from each other along the advancing direction D. In other words, the distance between the bottom wall 19 and the top wall 20 increases along the advancing direction D and towards the inlet 16 of the flue-gases flowing chamber 11.
the side walls 22 also diverge from each other along the advancing direction D.
the divergence between the bottom wall 19 and the top wall 20 is greater than the divergence between the side walls 22.
the inlet diffuser 12 comprises a first portion 25 comprising the flue-gases inlet 23, in which the top wall 20 has a first inclination with respect to a direction parallel to the axis A, a second portion 26 in which the top wall 20 has a second inclination with respect to a direction parallel to the axis A, which is greater than the first inclination, and a third portion 27 comprising the flue-gases outlet 24, in which the top wall 20 has a third inclination with respect to a direction parallel to the axis A, which is greater than the second inclination.
the second portion 26 is arranged between the first portion 25 and the third portion 27.
the third portion 27 is coupled to the inlet 16 of the flue-gases flowing chamber 11.
the bottom wall 19 preferably has a constant inclination with respect to a direction parallel to the axis A in the first portion 25, in the second portion 26 and in the third portion 27.
At least one of the side walls 22, the bottom wall 19 and the top wall 20 of the inlet diffuser 12 is provided with a bulge 30.
“Bulge” 30 herein and hereinafter is intended to mean a protrusion of the wall on which the bulge 30 is arranged towards the outside of the inlet diffuser 12.
the bulge 30 involves an increase in the passage section of the inlet diffuser 12 and a decrease in the passage section of the inlet diffuser 12.
the section decrease is arranged downstream of the section increase along the advancing direction D.
the bulge 30 defines a widening and a subsequent narrowing of the passage channel defined by the inlet diffuser 12.
the inlet diffuser 12 is provided with two bulges 30.
the first bulge 30 and the second bulge 30 face each other.
the first bulge 30 and the second bulge 30 are substantially identical.
the bulge 30 is provided with a diverging portion 32 and with a converging portion 33 placed downstream of the converging portion 32 along direction D.
an intermediate portion 34 is arranged between the diverging portion 32 and the converging portion 33 and does not cause a variation in the passage section.
the bulge 30 is prismatic.
the bulge is cylindrical and has a curvilinear plan outline.
the bulge 30 extends along the entire height of the side wall 22 on which it is placed.
"Height of the side wall 22" is intended to mean the distance between the bottom wall 19 and the top wall 20.
the bulge 30 is arranged near the flue-gases inlet 23 of the inlet diffuser 12.
the bulge 30 is arranged in the first portion 25 of the inlet diffuser 12.
the size of the bulge 30 depends on the passage section of the inlet diffuser 12 in the area where the bulge 30 is arranged.
Figure 3 shows a variant of the present invention wherein the inlet diffuser 12 is provided with at least one perforated plate 35.
the perforated plate 35 is arranged transverse to the advancing direction D.
the inlet diffuser 12 is provided with a first perforated plate 35 arranged downstream of the bulge 30 and with a second perforated plate 35 arranged at the bulge 30.
the second perforated plate 35 is arranged between the diverging portion 32 and the converging portion 33 of the bulge 30.
the second perforated plate 35 is arranged in the intermediate portion 34, preferably at the boundary between the intermediate portion 34 and the converging portion 33.
the inlet diffuser 12 can also comprise only one of the perforated plates 35 shown in Figure 3 .
the inlet diffuser 12 also comprises a plurality of fins 37 arranged downstream of the bulge 30.
the fins 37 are arranged between the bulge 30 and the first perforated plate 35.
the fins 37 are substantially uniformly distributed between the bottom wall 19 and the top wall 20.
the fins 37 are arranged on respective planes transverse to a direction H.
Direction H is intended to mean a direction which is substantially orthogonal to direction D and intersects the bottom wall 19 and the top wall 20.
the fins 37 are inclined with respect to direction D.
the fin 37a proximal to the bottom wall 19 is arranged parallel to the bottom wall 19, whereas the fin 37b proximal to the top wall 20 is parallel to the top wall 20.
the fins 37 comprised between the fin 37a and the fin 37b have inclinations comprised between the inclination of the fin 37a and the inclination of the fin 37b.
some or all of the fins 37 are parallel to each other.
the inlet diffuser 12 is further provided with an auxiliary burner 38, supplied with fuel by means of a dedicated supply duct 39 (see Figure 1 ).
the auxiliary burner 38 is arranged downstream of the bulge 30.
the auxiliary burner 38 is arranged downstream of the fins 37.
the bulge 30 causes the flow to mix, thus allowing the velocities and temperatures of the flow of flue gases flowing in the inlet diffuser 12 to become uniform.
the succession of an increase and a decrease in the passage section of the inlet diffuser 12 causes the generation of swirling zones, which optimally mix the flow.
pressure drops due to the presence of one or more bulges are limited.
the present invention makes it possible to avoid the use of complex and expensive homogenization systems.

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Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Thermal Sciences (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

EP20210469.1A 2019-11-28 2020-11-27 Wärmerückgewinnungskessel und anlage mit diesem wärmerückgewinnungskessel Active EP3828464B1 (de)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
IT102019000022395A IT201900022395A1 (it)	2019-11-28	2019-11-28	Caldaia a recupero e impianto comprendente detta caldaia a recupero

Publications (3)

Publication Number	Publication Date
EP3828464A1 true EP3828464A1 (de)	2021-06-02
EP3828464C0 EP3828464C0 (de)	2024-02-14
EP3828464B1 EP3828464B1 (de)	2024-02-14

Family

ID=70009130

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP20210469.1A Active EP3828464B1 (de)	2019-11-28	2020-11-27	Wärmerückgewinnungskessel und anlage mit diesem wärmerückgewinnungskessel

Country Status (2)

Country	Link
EP (1)	EP3828464B1 (de)
IT (1)	IT201900022395A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP4321801A1 (de) *	2022-08-12	2024-02-14	Doosan Enerbility Co., Ltd.	Abgasflussregler und wärmerückgewinnungsdampfgenerator damit

Citations (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3978822A (en) *	1975-08-04	1976-09-07	The Babcock & Wilcox Company	Vapor generator
EP0227928A2 (de) *	1985-12-04	1987-07-08	L. & C. Steinmüller GmbH	Abhitzekessel für staubbeladene Gase
US5339891A (en) *	1993-07-15	1994-08-23	The Babcock & Wilcox Company	Modular arrangement for heat exchanger units
US5461853A (en) *	1994-11-30	1995-10-31	The Babcock & Wilcox Company	HRSG boiler design with air staging and gas reburn
US20020078677A1 (en) *	2000-12-26	2002-06-27	Tomoaki Kamatani	Gas turbine installation
US20030061796A1 (en) *	2001-09-28	2003-04-03	Kazuyoshi Kaijima	Power generating plant
US20070119388A1 (en) *	2003-07-30	2007-05-31	Babcock-Hitachi Kabushiki Kaisha	Heat exchanger tube panel module, and method of constructing exhaust heat recovery boiler using the same
US20110139426A1 (en) *	2009-03-18	2011-06-16	Mitsubishi Heavy Industries, Ltd.	Heat exchanger

2019
- 2019-11-28 IT IT102019000022395A patent/IT201900022395A1/it unknown
2020
- 2020-11-27 EP EP20210469.1A patent/EP3828464B1/de active Active

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3978822A (en) *	1975-08-04	1976-09-07	The Babcock & Wilcox Company	Vapor generator
EP0227928A2 (de) *	1985-12-04	1987-07-08	L. & C. Steinmüller GmbH	Abhitzekessel für staubbeladene Gase
US5339891A (en) *	1993-07-15	1994-08-23	The Babcock & Wilcox Company	Modular arrangement for heat exchanger units
US5461853A (en) *	1994-11-30	1995-10-31	The Babcock & Wilcox Company	HRSG boiler design with air staging and gas reburn
US20020078677A1 (en) *	2000-12-26	2002-06-27	Tomoaki Kamatani	Gas turbine installation
US20030061796A1 (en) *	2001-09-28	2003-04-03	Kazuyoshi Kaijima	Power generating plant
US20070119388A1 (en) *	2003-07-30	2007-05-31	Babcock-Hitachi Kabushiki Kaisha	Heat exchanger tube panel module, and method of constructing exhaust heat recovery boiler using the same
US20110139426A1 (en) *	2009-03-18	2011-06-16	Mitsubishi Heavy Industries, Ltd.	Heat exchanger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP4321801A1 (de) *	2022-08-12	2024-02-14	Doosan Enerbility Co., Ltd.	Abgasflussregler und wärmerückgewinnungsdampfgenerator damit
US12098659B2 (en)	2022-08-12	2024-09-24	Doosan Enerbility Co., Ltd.	Exhaust gas flow regulator and heat recovery steam generator having same

Also Published As

Publication number	Publication date
IT201900022395A1 (it)	2021-05-28
EP3828464C0 (de)	2024-02-14
EP3828464B1 (de)	2024-02-14

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