WO2020184251A1 - Dispositif de chaudière - Google Patents

Dispositif de chaudière Download PDF

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Publication number
WO2020184251A1
WO2020184251A1 PCT/JP2020/008666 JP2020008666W WO2020184251A1 WO 2020184251 A1 WO2020184251 A1 WO 2020184251A1 JP 2020008666 W JP2020008666 W JP 2020008666W WO 2020184251 A1 WO2020184251 A1 WO 2020184251A1
Authority
WO
WIPO (PCT)
Prior art keywords
furnace
boiler
cage
cage portion
ties
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.)
Ceased
Application number
PCT/JP2020/008666
Other languages
English (en)
Japanese (ja)
Inventor
清 相田
東川　謙示
久典 重森
輝城 山本
翔 野ヶ峯
幸太郎 河村
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.)
Mitsubishi Power Ltd
Original Assignee
Mitsubishi Hitachi Power Systems Ltd
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 Mitsubishi Hitachi Power Systems Ltd filed Critical Mitsubishi Hitachi Power Systems Ltd
Priority to MX2021010901A priority Critical patent/MX2021010901A/es
Publication of WO2020184251A1 publication Critical patent/WO2020184251A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • F22B37/24—Supporting, suspending or setting arrangements, e.g. heat shielding

Definitions

  • the present invention relates to a boiler device, particularly to a support structure of a boiler body.
  • the boiler body is provided with a furnace and a cage portion, and the boiler body is suspended and supported by a steel beam via a suspension rod.
  • the steel column and the boiler body are connected via a sysmic tie.
  • Patent Document 1 describes a configuration in which the furnace of the boiler body and the cage portion are connected by a connecting device. This coupling device generates weak resistance against slow relative displacement due to heat between the furnace and the cage, or does not generate resistance and is large against sudden relative displacement in the event of an earthquake. It is configured to generate resistance.
  • the furnace is a hollow box-shaped structure surrounded by a water wall formed by connecting heat transfer tubes through which boiler water flows inside with a membrane bar, whereas the cage portion is the box-shaped structure.
  • a group of heat transfer tubes for convective heat transfer is installed inside. Therefore, there is a large difference between the mass per unit volume of the furnace (mass density) and the mass density of the cage portion. Specifically, the mass density of the furnace is very small compared to the mass density of the cage portion.
  • the furnace and the cage will vibrate in a unique cycle according to their respective rigidity and mass. Therefore, for example, the sub-side wall or nose provided between the furnace and the cage will be locally affected. Stress is applied and there is a risk of damage. In order to prevent this, it is preferable that the furnace and the cage portion vibrate in the same phase as possible, and the behavior of the furnace and the cage portion are integrated.
  • the connecting device exerts a binding force on the phase difference between the furnace and the cage at the time of an earthquake, so that the behavior of the furnace and the cage can be brought close to each other so as to be integrated. There is still room for improvement to further reduce the damage.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a boiler device capable of reducing damage to the boiler body in the event of an earthquake.
  • the present invention typically includes a boiler body having a cage portion at the rear of the furnace and the furnace, and a plurality of steel columns provided around the boiler body and supporting the boiler body.
  • a boiler device including, which connects the left and right water walls of the furnace and the left and right cage walls of the cage portion, respectively, and has a plurality of backstays extending in the horizontal direction, and the plurality of backstays. It is characterized by including a plurality of connecting members for connecting each of them and the plurality of steel columns provided on the left and right sides of the boiler main body.
  • the plurality of connecting members are all composed of a psychic tie, all of them are composed of dampers, or are composed of a combination of physics ties and dampers.
  • FIG. 6 is a vertical cross-sectional view showing a main part of the mounting mechanism shown in FIG.
  • FIG. 1 is a side view showing the overall configuration of the boiler device according to the present embodiment
  • FIG. 2 is a plan view of the boiler device shown in FIG. 1
  • FIG. 3 is a view showing the side surface of the boiler body and the arrangement of back stays shown in FIG. 4 is a perspective view of the back stay shown in FIG. 3
  • FIG. 5 is a sectional view taken along line VV of FIG. 3
  • FIG. 6 is a perspective view showing a main part of the back stay mounting mechanism
  • FIG. 7 is a mounting shown in FIG. It is a vertical sectional view which shows the main part of the mechanism.
  • the front-back, left-right, and up-down directions are defined as shown in FIGS. 1 and 2.
  • the boiler device includes a boiler main body 1 and a plurality of steel frame columns 12 provided so as to surround the boiler main body 1 and support the boiler main body 1.
  • the boiler main body 1 is suspended from a plurality of steel frame beams 11 spanning the upper portions of the plurality of steel frame columns 12 via a plurality of suspension rods 10.
  • the boiler main body 1 includes a furnace 2, a cage portion 3, and a sub-side wall 4 connecting the furnace 2 and the cage portion 3.
  • Reference numeral 5 is a nose.
  • the furnace 2 is surrounded by a water wall 2a (see FIGS. 6 and 7) formed by welding and fixing heat transfer tubes 7 through which boiler water flows to each other with a membrane bar 8.
  • the cage portion 3 is also surrounded by a cage wall 3a having the same structure as the water wall 2a.
  • the furnace 2 is composed of a hollow box-shaped structure, and the cage portion 3 is provided with a heat transfer tube group (not shown) for convective heat transfer in the hollow box-shaped structure. Therefore, the mass (mass density) per unit volume of the furnace 2 is considerably smaller than the mass density of the cage portion 3.
  • the furnace 2 is connected to a plurality of steel frame columns 12 provided in front of the furnace 2 via a plurality of psychic ties 13b (second physic ties). More specifically, the back stay 20 provided on the water wall 2a of the furnace 2 and the steel frame column 12 are connected by a sysmic tie 13b. Further, the cage portion 3 is connected to a plurality of steel frame columns 12 provided behind the cage portion 3 via a plurality of psychic ties 13c (third psychic ties). More specifically, the back stay 20 provided on the cage wall 3a and the steel frame column 12 are connected by a cysmic tie 13c.
  • left and right water walls 2a of the furnace 2 and the left and right cage walls 3a of the cage portion 3 are connected by a plurality of back stays 20 extending in the horizontal direction, and these back stays 20 and the left and right of the boiler main body 1 are connected.
  • a plurality of steel frame columns 12 provided in the above are connected to each other via a plurality of psychic ties 13a (first physic ties).
  • the sysmic tie 13a corresponds to the "connecting member" of the present invention.
  • the number of cysmic ties 13a, 13b, 13c may be appropriate.
  • a plurality of dampers 15 are provided between the furnace 2 and the cage portion 3 along the front-rear direction.
  • two dampers 15 are provided in the vertical direction (see FIG. 1) and two dampers 15 in the horizontal direction (see FIG. 2), but the number thereof does not matter.
  • One end of each damper 15 is fixed to the back stay 20 attached to the water wall 2a, and the other end is fixed to the back stay 20 attached to the cage wall 3a.
  • an oil damper or a viscoelastic damper can be used as the damper 15.
  • an oil damper or a viscoelastic damper it is possible to regulate a large displacement due to an earthquake while allowing a displacement due to thermal deformation between the furnace 2 and the cage portion 3.
  • it is more preferable to use a viscoelastic damper because it operates quickly in the event of an earthquake and the relative displacement between the furnace 2 and the cage portion 3 can be regulated.
  • the upper damper 15 is located at the bottom of the auxiliary side wall 4 below the portion connected to the furnace 2, and is at a height position (L2) near the bent portion of the nose 5. ) Is provided.
  • the lower damper 15 is below the upper damper 15 and is provided at a height position (L1) where the body portion of the furnace 2 and the body portion of the cage portion 3 can be connected.
  • the sysmic tie 13b between the furnace 2 and the steel frame column 12, the damper 15, and the sismic tie 13c between the cage portion 3 and the steel frame column 12 are arranged in the front-rear direction in a plan view. They are arranged on substantially the same straight lines M1 and M2 that extend (see FIG. 2). Therefore, the vibration of the boiler main body 1 in the front-rear direction at the time of an earthquake can be effectively suppressed.
  • the back stay 20 will be described.
  • the water wall 2a receives the internal pressure generated by the combustion air and the combustion gas inside the water wall 2a.
  • This pressure inside the furnace acts on the water wall 2a, the sub-side wall 4 and the cage wall 3a in a positive and negative manner, and the water wall 2a, the sub-wall 4 and the cage wall 3a exhibit swelling and deformation behavior. Therefore, in order to prevent excessive deformation of the water wall 2a, the auxiliary side wall 4 and the cage wall 3a, the back stay 20 is attached to the outer surface of the water wall 2a, the auxiliary side wall 4 and the cage wall 3a as shown in FIGS. That is, it is provided on the outer surface of the boiler body 1. For example, as shown in FIG. 5, deformation of the furnace 2 is prevented by surrounding the four sides of the furnace 2 with backstays 20.
  • the backstay 20 is made of H-shaped steel and is attached to the water wall 2a or the cage wall 3a via the attachment mechanism 30. Since the mounting mechanism 30 applied to the water wall 2a and the mounting mechanism 30 applied to the cage wall 3a are the same, the mounting mechanism 30 applied to the water wall 2a will be described here.
  • the mounting mechanism 30 has a pair of lugs 31 provided along the longitudinal direction of the heat transfer tube 7, a pin 32 inserted through the pair of lugs 31, and a plate shape mounted on the heat transfer tube 7 and fixed by the pin 32.
  • the tie bar 33, the vertical plate-shaped standoff 34 fixed to the tie bar 33, and the upper and lower ends of the standoff 34 are provided in pairs, and the back stay 20 can be slidably slid in the horizontal direction (arrow direction in FIG. 6). It is equipped with a support lug 35, which is held in. Since the back stay 20 slides in the horizontal direction, it is possible to prevent a large impact from being applied to the boiler body 1 even in the event of an earthquake.
  • the water wall 2a which is the left and right side walls of the furnace 2 and the cage wall 3a which is the left and right side walls of the cage portion 3 are connected by a back stay 20. Since the back stay 20 and the steel column 12 are connected by the psychic tie 13a (first physic tie), the furnace 2 and the cage portion 3 are integrated by the back stay 20, and the furnace 2 and the cage portion 3 are integrated. And vibrate in the left-right direction with the same behavior. In other words, the furnace 2 and the cage portion 3 do not vibrate in their own vibration cycles. As a result, it is possible to avoid stress concentration in the lower part of the connection portion between the furnace 2 and the sub-side wall 4 (part A in FIG. 1) and the lower part of the connection portion between the cage portion 3 and the sub-wall 4 (part B in FIG. 1). It is possible to prevent damage to the relevant part during an earthquake.
  • the dampers 15 between the furnace 2 and the cage portion 3 at the height positions L1 and L2 in FIG. 1 in two stages, the relative displacement between the two can be suppressed.
  • the vertical positions of the psychic ties 13b and 13c (second physic tie, third physic tie) and the damper 15 (second damper) are set to the same height positions L1 and L2, and the horizontal positions are also flat. By making them on the same straight line (M1, M2) visually, the relative deformation between the furnace 2 and the cage portion 3 can be effectively suppressed.
  • the damper 15 a viscoelastic damper, the responsiveness at the time of an earthquake is enhanced, so that the relative deformation between the furnace 2 and the cage portion 3 can be suppressed more effectively.
  • the seismic force component in the front-rear direction may be larger than that in the left-right direction.
  • the number of dampers 15 installed in the front-rear direction in FIG. 2 is increased or the dampers are increased.
  • the capacity of 15 may be increased.
  • FIG. 8 is a plan view of the boiler device according to the first modification.
  • the plurality of connecting members connecting the left and right back stays 20 and the steel frame columns 12 are a plurality of sismic ties 13a (first physic ties) and a plurality of dampers 15a (first dampers).
  • the damper 15a is an oil damper or a viscoelastic damper, like the damper 15.
  • the seismic force component in the left-right direction may be larger than that in the front-back direction.
  • a heavy object horizontal coil
  • the seismic force on the cage 3 side The relationship between the inertial force) and the seismic force (inertial force) on the furnace 2 side is that the seismic force on the cage portion 3 side (inertial force)> the seismic force on the furnace 2 side (inertial force).
  • the reaction force of the damper 15a viscoelastic damper
  • the configuration is suitable for receiving the seismic force component in the left-right direction.
  • one sysmic tie 13a is provided on each side of the front side of the furnace 2
  • one damper 15a is provided on each side of the rear side of the furnace 2
  • the cage portion 3 is provided.
  • Two dampers 15a are provided on each of the left and right sides.
  • all the psychic ties 13a can be replaced with the damper 15a. That is, the plurality of connecting members that connect the back stay 20 and the steel frame column 12 may all be configured by the damper 15a.
  • FIG. 9 is a plan view of the boiler device according to the second modification.
  • the back stays 20a provided on the left and right water walls 2a of the furnace 2 and the back stays 20b provided on the left and right cage walls 3a of the cage portion 3 are formed separately. It is different from the first modification. Even with such a configuration, damage to the boiler main body 1 can be reduced in the event of an earthquake.
  • the present invention may be applied to a drum type (superheater hanging type) boiler belonging to the natural circulation type shown in FIG. 10 or a Benson type boiler belonging to the once-through type shown in FIG.
  • the damper 15 is similarly provided at the height positions L1 and L2.
  • the back stay 20 the psychic ties 13b and 13c, and the steel frame column 12 shown in FIG. 1 are not shown.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Vibration Prevention Devices (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Abstract

La présente invention concerne un dispositif de chaudière capable de réduire les dommages causés à un corps de chaudière en cas de tremblement de terre. Un dispositif de chaudière comprend un corps de chaudière (1) ayant un foyer (2) et une cage (3) à la partie arrière du foyer, et une pluralité de colonnes d'acier (12) disposées autour du corps de chaudière et supportant le corps de chaudière, le dispositif de chaudière étant caractérisé en ce qu'il comprend une pluralité d'étais arrière s'étendant horizontalement (20) qui relient respectivement des murs d'eau gauche et droit (2a) de la chaudière et des parois de cage gauche et droite (3a) de la cage, et une pluralité d'éléments de liaison (13a, 15a) reliant chacun de la pluralité d'étais arrière à la pluralité de colonnes d'acier disposées sur la gauche et la droite du corps de chaudière.
PCT/JP2020/008666 2019-03-13 2020-03-02 Dispositif de chaudière Ceased WO2020184251A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
MX2021010901A MX2021010901A (es) 2019-03-13 2020-03-02 Dispositivo de caldera.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019046360A JP6766202B2 (ja) 2019-03-13 2019-03-13 ボイラ装置
JP2019-046360 2019-03-13

Publications (1)

Publication Number Publication Date
WO2020184251A1 true WO2020184251A1 (fr) 2020-09-17

Family

ID=72426415

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/008666 Ceased WO2020184251A1 (fr) 2019-03-13 2020-03-02 Dispositif de chaudière

Country Status (4)

Country Link
JP (1) JP6766202B2 (fr)
MX (1) MX2021010901A (fr)
TW (1) TWI744815B (fr)
WO (1) WO2020184251A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021124827A1 (fr) * 2019-12-20 2021-06-24 三菱パワー株式会社 Système de contrôle de séisme pour chauffe-eau, et dispositif de contrôle de séisme pour chauffe-eau

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS614102U (ja) * 1979-12-03 1986-01-11 フオスタ−・ホイ−ラ−・エナ−ジイ・コ−ポレイシヨン 蒸気発生装置を支持するための装置
JPS6380405U (fr) * 1986-11-12 1988-05-27
JPH05322103A (ja) * 1992-05-21 1993-12-07 Babcock Hitachi Kk ボイラの制震支持構造体
JP2014156964A (ja) * 2013-02-15 2014-08-28 Babcock-Hitachi Co Ltd ボイラ制振用の摩擦型サイスミックタイ

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202719590U (zh) * 2012-05-23 2013-02-06 中国电力工程顾问集团华东电力设计院 悬吊式锅炉装置
JP6809807B2 (ja) * 2016-04-12 2021-01-06 三菱パワー株式会社 配管構造、及びボイラシステム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS614102U (ja) * 1979-12-03 1986-01-11 フオスタ−・ホイ−ラ−・エナ−ジイ・コ−ポレイシヨン 蒸気発生装置を支持するための装置
JPS6380405U (fr) * 1986-11-12 1988-05-27
JPH05322103A (ja) * 1992-05-21 1993-12-07 Babcock Hitachi Kk ボイラの制震支持構造体
JP2014156964A (ja) * 2013-02-15 2014-08-28 Babcock-Hitachi Co Ltd ボイラ制振用の摩擦型サイスミックタイ

Also Published As

Publication number Publication date
JP6766202B2 (ja) 2020-10-07
JP2020148394A (ja) 2020-09-17
TW202100908A (zh) 2021-01-01
MX2021010901A (es) 2021-10-01
TWI744815B (zh) 2021-11-01

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