JP2020024056A - Waste heat recovery boiler - Google Patents

Waste heat recovery boiler Download PDF

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JP2020024056A
JP2020024056A JP2018147971A JP2018147971A JP2020024056A JP 2020024056 A JP2020024056 A JP 2020024056A JP 2018147971 A JP2018147971 A JP 2018147971A JP 2018147971 A JP2018147971 A JP 2018147971A JP 2020024056 A JP2020024056 A JP 2020024056A
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casing
heat recovery
exhaust gas
recovery boiler
blocks
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JP6665242B2 (en
Inventor
森川　昭二
Shoji Morikawa
昭二 森川
風間　健一
Kenichi Kazama
健一 風間
匡博 伊福
Kyohiro Ifuku
匡博 伊福
浩三 伊豆田
Kozo Izuta
浩三 伊豆田
石川　雅之
Masayuki Ishikawa
石川　　雅之
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Mitsubishi Power Ltd
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Mitsubishi Hitachi Power Systems Ltd
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Priority to JP2018147971A priority Critical patent/JP6665242B2/en
Priority to PCT/JP2019/029663 priority patent/WO2020031774A1/en
Priority to CN201980006179.2A priority patent/CN111433515B/en
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Publication of JP6665242B2 publication Critical patent/JP6665242B2/en
Priority to PH12020550601A priority patent/PH12020550601A1/en
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    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

To provide a waste heat recovery boiler capable of flattening by eliminating a step on an inner surface side of a casing.SOLUTION: A waste heat recovery boiler includes a casing 2 in which an exhaust gas 1 is guided from a gas turbine, a heat insulating material 13 for covering an inner surface side of the casing 2, and a heat exchanger arranged inside the casing. The casing 2 is divided into a plurality of blocks along the flow direction of the exhaust gas 1. The block forms a wall surface structure in which both end parts are surrounded by two channel steels 10, and webs of the channel steels 10 provided at adjacent blocks are connected so that inside flanges continue with each other by having a step. Also, by arranging the heat insulation material 13 whose thickness dimension varies stepwise in a gap generated by the step, the inner surface side of the heat insulation material 13 opposing to the heat exchanger in the casing 2 become flush.SELECTED DRAWING: Figure 2

Description

本発明は、ガスタービンから排出される排ガスをケーシング内に導入し、内部の熱交換器で排ガスの熱を吸収して蒸気を発生させる排熱回収ボイラに係り、特に、ケーシングが排ガスの流れ方向に沿って複数のブロックに分割されている排熱回収ボイラに関する。   The present invention relates to an exhaust heat recovery boiler that introduces exhaust gas discharged from a gas turbine into a casing and absorbs the heat of the exhaust gas with an internal heat exchanger to generate steam. The present invention relates to an exhaust heat recovery boiler divided into a plurality of blocks along.

高効率発電の一環として注目されている複合発電プラントは、まず、ガスタービンによる発電を行うと共に、ガスタービンから排出される排ガス中の熱を排熱回収ボイラ（ＨＲＳＧ）において回収し、この排熱回収ボイラで発生した蒸気によって蒸気タービンを駆動させて発電するものである。この複合発電プラントは、ガスタービンによる発電と蒸気タービンによる発電を同時に行うことができるため、発電効率が高い上にガスタービンは負荷応答性に優れており、急激な電力需要の上昇にも十分対応し得るという利点もある。   A combined cycle power plant, which is receiving attention as part of high-efficiency power generation, first generates power using a gas turbine, and recovers heat in exhaust gas discharged from the gas turbine in a waste heat recovery boiler (HRSG). The steam generated by the recovery boiler drives a steam turbine to generate power. This combined cycle power plant can perform both power generation using a gas turbine and power generation using a steam turbine at the same time, so the power generation efficiency is high and the gas turbine has excellent load responsiveness, which is enough to cope with a sudden increase in power demand. There is also the advantage that it can be done.

この種の複合発電プラントにおいて、一般的に、排熱回収ボイラのケーシング内には、ガスタービンの排ガスの熱を回収する過熱器、蒸発器、節炭器などの熱交換器が配置されていると共に、排ガスの脱硝を行うために脱硝装置が配置されている。ケーシングは左右両側面と上下壁面とで構成された筐体構造であり、排ガスはケーシング内で前記熱交換器と熱交換した後、ケーシングの出口に設けられた煙突から大気中に放散される。   In this type of combined cycle power plant, generally, a heat exchanger such as a superheater, an evaporator, and a economizer that collects heat of exhaust gas from a gas turbine is disposed in a casing of an exhaust heat recovery boiler. At the same time, a denitration device is disposed for denitration of exhaust gas. The casing has a housing structure composed of left and right side surfaces and upper and lower wall surfaces. After the exhaust gas exchanges heat with the heat exchanger in the casing, the exhaust gas is released into the atmosphere from a chimney provided at an outlet of the casing.

また、ケーシングは、重量物である様々な機器をサポートする必要があり、地震や暴風時などに作用する水平力に対して十分な強度がなければならないため、柱や梁などの強度部材が主体で構成されている。さらに、ケーシング内を流れる排ガスの温度が高温であるため、ケーシングの内部には保温材が内張りされている。なお、ケーシングは大型構造物であるため、通常、ケーシングは複数のブロックに分割した小モジュールで輸送し、この小モジュールを現地で組立てるようにしている。   In addition, the casing needs to support a variety of heavy equipment and must have sufficient strength against horizontal forces acting in the event of an earthquake or storm. It is composed of Furthermore, since the temperature of the exhaust gas flowing in the casing is high, a heat insulating material is lined inside the casing. Since the casing is a large-sized structure, the casing is usually transported in small modules divided into a plurality of blocks, and the small modules are assembled on site.

例えば、特許文献１に記載された排熱回収ボイラでは、ケーシングを柱の位置で複数のブロックに分割すると共に、各柱を断面コ字形の溝型鋼で形成することにより、両端部を２本の溝型鋼で囲んだ単位ブロックを構成し、このようにモジュール化したブロックで輸送して現地組立てを行うようにしている。その際、ブロック内の柱と柱間にはスチフナーとインナーケースが工場にて溶接されていると共に、インナーケースに所定厚の保温材が取り付けられている。そして、現地で隣り合うブロックの溝形鋼を背中合わせに接続し、これら溝形鋼のウェブどうしをボルトで締結するようにしている。   For example, in the exhaust heat recovery boiler described in Patent Document 1, the casing is divided into a plurality of blocks at the positions of the pillars, and each pillar is formed of a U-shaped channel steel so that both ends are formed of two pieces. Unit blocks surrounded by channel steel are constructed and transported by such modularized blocks for on-site assembly. At this time, a stiffener and an inner case are welded between columns in the block at a factory, and a heat insulating material having a predetermined thickness is attached to the inner case. Then, the channel steels of adjacent blocks on the site are connected back to back, and the webs of these channel steels are fastened with bolts.

図８は、このように複数のブロックに分割されたケーシングの壁面構造を示す横断面図である。図８に示すように、ケーシング１００は単位ブロックの溝型鋼１０１どうしを接続して構成されており、各ブロックの溝型鋼１０１間に溶接されたインナーケース１０２に所定厚の保温材１０３が取り付けられている。ここで、ケーシング１００の内部を流れる排ガスの温度は入口に近い上流側が高く、出口側に向かって次第に低温となるため、排ガスの上流側に設置されるブロックには厚みの厚い保温材１０３が取り付けられ、下流側に設置されるブロックには厚みの薄い保温材１０３が取り付けられている。   FIG. 8 is a cross-sectional view showing the wall surface structure of the casing divided into a plurality of blocks as described above. As shown in FIG. 8, the casing 100 is configured by connecting the channel steels 101 of the unit blocks, and a heat insulating material 103 having a predetermined thickness is attached to the inner case 102 welded between the channel steels 101 of the respective blocks. ing. Here, since the temperature of the exhaust gas flowing inside the casing 100 is high on the upstream side near the inlet and gradually lowers toward the outlet side, a thick heat insulating material 103 is attached to the block installed on the upstream side of the exhaust gas. A thin heat insulating material 103 is attached to a block installed on the downstream side.

特開昭６３−１８３３０２号公報JP-A-63-183302

図８に示すように、同一サイズの溝型鋼１０１どうしを背中合わせで接続してケーシング１００を構成する場合、各溝型鋼１０１の内側フランジは排ガスの流れ方向に沿って面一となるため、排ガスの上流側と下流側に配置される保温材１０３の厚みの違いにより、ケーシング１００の内側面と熱交換器の側面との間に凹凸状の段差ができてしまう。このため、従来は、段差によって生じた隙間を埋めるようにバッフルプレート（流れ防止板）１０４を配置する必要があり、かかるバッフルプレート１０４によって部品コストや組立コストが上昇するという問題があった。   As shown in FIG. 8, when the casing 100 is configured by connecting the channel steels 101 of the same size back to back, the inner flanges of the channel steels 101 are flush with each other in the flow direction of the exhaust gas. Due to the difference in the thickness of the heat insulating material 103 arranged on the upstream side and the downstream side, an uneven step is formed between the inner side surface of the casing 100 and the side surface of the heat exchanger. For this reason, conventionally, it is necessary to arrange the baffle plate (flow prevention plate) 104 so as to fill the gap created by the step, and there has been a problem that the cost of parts and assembly increases due to the baffle plate 104.

本発明は、このような従来技術の実情からなされたもので、その目的は、ケーシングの内面側の段差をなくしてフラット化することができる排熱回収ボイラを提供することにある。   The present invention has been made in view of such circumstances of the related art, and an object of the present invention is to provide an exhaust heat recovery boiler that can be flattened without a step on an inner surface side of a casing.

上記目的を達成するために、代表的な本発明は、ガスタービンからの排ガスが導かれるケーシングと、前記ケーシングの内面側を覆う保温材と、前記ケーシングの内部に配置された熱交換器とを備え、前記ケーシングが排ガスの流れ方向に沿って複数のブロックに分割されている排熱回収ボイラにおいて、前記ブロックを排ガスの流れ方向に沿う両端部が溝型鋼で囲まれた壁面構造となし、隣接する前記ブロックに備えられる前記溝型鋼のウェブどうしを、互いの内側フランジが段差を持って連続するように接続すると共に、厚み寸法が異なる前記保温材を前記段差によって生じた隙間に配置することにより、前記熱交換器に対向する前記保温材の内面側が面一となるように構成したことを特徴とする。   In order to achieve the above object, a typical present invention includes a casing through which exhaust gas from a gas turbine is guided, a heat insulating material covering an inner surface side of the casing, and a heat exchanger disposed inside the casing. In the exhaust heat recovery boiler, wherein the casing is divided into a plurality of blocks along the flow direction of the exhaust gas, the block has a wall structure in which both ends along the flow direction of the exhaust gas are surrounded by a grooved steel. By connecting the grooved steel webs provided in the block to each other so that the inner flanges thereof are continuous with a step, by disposing the heat insulating materials having different thickness dimensions in the gap generated by the step. The heat insulating material is configured so that the inner surface side thereof facing the heat exchanger is flush with the heat exchanger.

本発明の排熱回収ボイラによれば、ケーシングの内面側の段差をなくしてフラット化することができる。なお、上記した以外の課題、構成および効果は、以下の実施形態の説明により明らかにされる。   According to the exhaust heat recovery boiler of the present invention, the casing can be flattened without any step on the inner surface side. In addition, problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

実施の形態に係る排熱回収ボイラの内部構造を示す側面図である。It is a side view which shows the internal structure of the waste heat recovery boiler which concerns on embodiment. 図１の排熱回収ボイラに備えられるケーシングの壁面構造を示す横断面図である。It is a cross-sectional view which shows the wall surface structure of the casing provided in the exhaust heat recovery boiler of FIG. 図２のケーシングに適用される受圧部材の設置状態を示す平面図である。FIG. 3 is a plan view showing an installation state of a pressure receiving member applied to the casing of FIG. 2. 該受圧部材の設置状態を示す側面図である。It is a side view which shows the installation state of this pressure receiving member. 該受圧部材の設置状態を示す正面図である。It is a front view showing the installation state of the pressure receiving member. 該受圧部材の設置状態を示す斜視図である。It is a perspective view showing the installation state of the pressure receiving member. 変形例に係るケーシングの壁面構造を示す横断面図である。It is a cross-sectional view which shows the wall surface structure of the casing which concerns on a modification. 従来例に係るケーシングの壁面構造を示す横断面図である。It is a cross-sectional view which shows the wall surface structure of the casing which concerns on a prior art example.

以下、本発明の実施の形態を図１〜図７を参照しつつ説明する。   Hereinafter, embodiments of the present invention will be described with reference to FIGS.

図１は、実施の形態に係る排熱回収ボイラの内部構造を示す側面図である。図１に示すように、図示せぬガスタービンからの排ガス１は、排熱回収ボイラ（ＨＲＳＧ）のケーシング２に流入するようになっており、ケーシング２の内部には過熱器３、第１の蒸発器４、脱硝装置５、第２の蒸発器６、節炭器７が配置されている。ケーシング２内に流入した排ガス１は、過熱器３、第１の蒸発器４、第２の蒸発器６及び節炭器７の伝熱面を構成する熱交換器と接触して熱吸収された後、比較的低温になったガスがケーシング２の出口に設けられた煙突８から大気中に放散される。   FIG. 1 is a side view showing the internal structure of the exhaust heat recovery boiler according to the embodiment. As shown in FIG. 1, exhaust gas 1 from a gas turbine (not shown) flows into a casing 2 of an exhaust heat recovery boiler (HRSG), and a superheater 3 and a first The evaporator 4, the denitration device 5, the second evaporator 6, and the economizer 7 are arranged. Exhaust gas 1 flowing into the casing 2 comes into contact with the heat exchangers constituting the heat transfer surfaces of the superheater 3, the first evaporator 4, the second evaporator 6, and the economizer 7, and is heat-absorbed. Thereafter, the relatively low-temperature gas is released into the atmosphere from a chimney 8 provided at the outlet of the casing 2.

ケーシング２は、左右両側面と上下壁面とで構成された筐体構造であり、架構９を介して地面に支持されている。ここで、ケーシング２は、複数のブロックに分割した小モジュールで輸送され、この小モジュールを現地で組立て据え付けするようにしている。   The casing 2 has a housing structure including left and right side surfaces and upper and lower wall surfaces, and is supported on the ground via a frame 9. Here, the casing 2 is transported in small modules divided into a plurality of blocks, and the small modules are assembled and installed on site.

図２はケーシング２の壁面構造を示す横断面図であり、本例では、ケーシング２が５つのブロックａ，ｂ，ｃ，ｄ，ｅに分割されている。図２に示すように、ケーシング２は柱の位置で５つのブロックａ，ｂ，ｃ，ｄ，ｅに分割されており、これらブロックａ〜ｅの分割位置は過熱器３、第１の蒸発器４、脱硝装置５、第２の蒸発器６、節炭器７の設置位置に対応している。すなわち、ブロックａは過熱器３の外側に、ブロックｂは第１の蒸発器４の外側に、ブロックｃは脱硝装置５の外側に、ブロックｄは第２の蒸発器６の外側に、ブロックｅは節炭器７の外側にそれぞれ位置するようになっている。   FIG. 2 is a cross-sectional view showing the wall structure of the casing 2. In this example, the casing 2 is divided into five blocks a, b, c, d, and e. As shown in FIG. 2, the casing 2 is divided into five blocks a, b, c, d, and e at positions of columns, and the divided positions of these blocks a to e are the superheater 3 and the first evaporator. 4, corresponding to the installation positions of the denitration device 5, the second evaporator 6, and the economizer 7. That is, the block a is outside the superheater 3, the block b is outside the first evaporator 4, the block c is outside the denitration device 5, the block d is outside the second evaporator 6, and the block e is Are located outside the economizer 7 respectively.

ケーシング２の柱は断面コ字形の溝型鋼１０で形成されており、各ブロックａ〜ｅの両端部は２本の溝型鋼１０で囲まれている。ここで、各ブロックａ〜ｅは同一サイズの２本の溝型鋼１０で両端部を囲んでいるが、各ブロックａ〜ｅ毎に幅寸法の異なる溝型鋼１０が用いられている。具体的には、排ガス１の最も上流側に設置されるブロックａはウェブ高さを最小とする溝型鋼１０を用いており、ブロックａの下流側に隣接するブロックｂは、ブロックａの溝型鋼１０よりもウェブ高さが長い溝型鋼１０を用いている。また、ブロックｂの下流側に隣接するブロックｃとブロックｄは、ブロックｂの溝型鋼１０よりもさらにウェブ高さが長い溝型鋼１０を用いており、排ガス１の最も下流側に設置されるブロックｅはウェブ高さを最長とする溝型鋼１０を用いている。なお、ブロックｃとブロックｄで同一サイズの溝型鋼１０を用いているのは、ブロックｃの内側に配置される機器が脱硝装置５であり、当該部位では排ガス１の熱吸収が行われないからである。   The column of the casing 2 is formed of a channel steel 10 having a U-shaped cross section, and both ends of each of the blocks a to e are surrounded by two channel steels 10. Here, each block a to e surrounds both ends with two channel steels 10 of the same size, but channel steels 10 having different widths are used for each of the blocks a to e. Specifically, the block a installed at the most upstream side of the exhaust gas 1 uses the channel steel 10 having the minimum web height, and the block b adjacent to the downstream side of the block a is the channel steel of the block a. The channel steel 10 whose web height is longer than 10 is used. Further, the blocks c and d adjacent to the downstream side of the block b use the channel steel 10 whose web height is longer than the channel steel 10 of the block b, and the block installed at the most downstream side of the exhaust gas 1. For e, a channel steel 10 having the longest web height is used. The reason why the channel steel 10 having the same size is used for the block c and the block d is that the equipment disposed inside the block c is the denitration device 5 and the heat absorption of the exhaust gas 1 is not performed at the corresponding portion. It is.

隣り合う２つのブロックは、それぞれの溝型鋼１０のウェブが背中合わせに接続されるように図示せぬボルトで締結されている。その際、各ブロックａ〜ｅは全ての溝型鋼１０の外側フランジが面一となるように接続されるため、各ブロックａ〜ｅの内面側の接続部についてみると、ウェブ高さが異なる２つの溝型鋼１０の内側フランジ間に段差を生じることになる。   Two adjacent blocks are fastened with bolts (not shown) so that the webs of the respective channel steels 10 are connected back to back. At this time, since the blocks a to e are connected so that the outer flanges of all the channel steels 10 are flush with each other, the connection height on the inner surface side of each of the blocks a to e has a different web height 2. A step occurs between the inner flanges of the two channel steels 10.

各ブロックａ〜ｅの溝型鋼１０間にはスチフナー１１とインナーケース１２が設けられており、これらスチフナー１１とインナーケース１２は輸送前に工場にて溶接される。また、インナーケース１２には保温材１３が取り付けられており、この保温材１３の厚みはブロックａ，ｂ，ｃ，ｄ，ｅ毎に最適なものが用いられている。具体的には、排ガス１の温度が最も高温となるブロックａに厚い保温材１３が用いられ、以下、排ガス１の温度が次第に低くなるブロックｂ及びブロックｃ，ｄの順に保温材１３の厚みを薄くし、最も低温となるブロックｅに薄い保温材１３が用いられている。   A stiffener 11 and an inner case 12 are provided between the channel steels 10 of the blocks a to e. The stiffener 11 and the inner case 12 are welded at a factory before transportation. A heat insulating material 13 is attached to the inner case 12, and the thickness of the heat insulating material 13 is optimal for each of the blocks a, b, c, d, and e. Specifically, a thick heat insulating material 13 is used for the block a in which the temperature of the exhaust gas 1 is the highest, and the thickness of the heat insulating material 13 is reduced in the order of the block b and the blocks c and d in which the temperature of the exhaust gas 1 gradually decreases. A thin heat insulating material 13 is used for the block e which is thinned and has the lowest temperature.

ここで、前述した各ブロックａ〜ｅにおける接続部の段差の大きさは、各ブロックａ〜ｅに必要とされる保温材１３の厚みの違いを考慮して設定されており、それに基づいて各ブロックａ〜ｅに所定のウェブ高さを有する溝型鋼１０が用いられている。例えば、ブロックａに必要とされる保温材１３の厚みをｔ１、ブロックｂに必要とされる保温材１３の厚みをｔ２とすると、ブロックａとブロックｂ間の段差が（ｔ１−ｔ２）となるように、ブロックａよりもブロックｂの方がウェブ高さを（ｔ１−ｔ２）だけ長くした溝型鋼１０を用いるようにしている。   Here, the size of the step of the connecting portion in each of the blocks a to e described above is set in consideration of the difference in the thickness of the heat insulating material 13 required for each of the blocks a to e. A channel steel 10 having a predetermined web height is used for the blocks a to e. For example, assuming that the thickness of the heat insulator 13 required for the block a is t1 and the thickness of the heat insulator 13 required for the block b is t2, the step between the block a and the block b is (t1−t2). In this way, the channel steel 10 in which the web height of the block b is longer than that of the block a by (t1-t2) is used.

このように厚みの異なる保温材１３を各ブロックａ〜ｅの内面側に取り付けると、前述したブロック間の接続部に生じる段差が保温材１３の厚みの違いによって相殺されるため、ケーシング２内の熱交換器に対向する保温材１３の内面は段差のないフラットなものとなる。したがって、ケーシング２の内側面と熱交換器の側面との間に段差による隙間は発生せず、当該隙間を埋めるためのバッフルプレート（流れ防止板）が不要となるため、その分だけ部品コストや組立コストを削減することができる。   When the heat insulating materials 13 having different thicknesses are attached to the inner surfaces of the blocks a to e as described above, the step generated at the connecting portion between the blocks is offset by the difference in the thickness of the heat insulating materials 13. The inner surface of the heat insulating material 13 facing the heat exchanger is flat with no steps. Therefore, no gap is formed between the inner side surface of the casing 2 and the side surface of the heat exchanger due to a step, and a baffle plate (flow prevention plate) for filling the gap is not required. Assembly costs can be reduced.

図２に示すケーシング２において、隣接するブロック間の段差が大きい場合は、当該部位を受圧部材によって補強することが好ましい。図３はこのような受圧部材の設置状態を示す平面図、図４は該受圧部材の設置状態を示す側面図、図５は該受圧部材の設置状態を示す正面図、図６は該受圧部材の設置状態を示す斜視図である。   In the casing 2 shown in FIG. 2, when a step between adjacent blocks is large, it is preferable to reinforce the portion with a pressure receiving member. FIG. 3 is a plan view showing the installation state of such a pressure receiving member, FIG. 4 is a side view showing the installation state of the pressure receiving member, FIG. 5 is a front view showing the installation state of the pressure receiving member, and FIG. It is a perspective view which shows the installation state of.

図３〜図６に示すように、受圧部材１４はスチフナー１１と補強板１５を組み合わせて構成されており、この受圧部材１４は例えば段差の大きいブロックｂとブロックｃの接続部に配置されている。   As shown in FIGS. 3 to 6, the pressure receiving member 14 is configured by combining the stiffener 11 and the reinforcing plate 15, and the pressure receiving member 14 is disposed at, for example, a connection portion between a block b having a large step and a block c. .

説明の都合上、ブロックｂの溝型鋼に符号１０Ａを付し、ブロックｃの溝型鋼に符号１０Ｂを付すと、溝型鋼１０Ａのウェブ高さよりも溝型鋼１０Ｂのウェブ高さの方が長いため、前述したように、溝型鋼１０Ａと溝型鋼１０Ｂの接合部には段差Ｂが生じている。スチフナー１１はＨ型鋼からなり、このスチフナー１１はブロックｂの両端部の溝型鋼１０Ａを連結するように水平方向に延びている。補強板１５は５角形状の鋼材からなり、溝型鋼１０ＡのウェブとＨ型鋼（スチフナー）１１のウェブとの間に配置されている。補強板１５は、溝型鋼１０Ｂに背中合わせに接合された溝型鋼１０Ａの内側フランジの延長線上に位置しており、その一辺は中継板１６を介してＨ型鋼１１のウェブ面に当接している。   For convenience of explanation, when the reference numeral 10A is given to the channel steel of the block b and the reference numeral 10B is given to the channel steel of the block c, since the web height of the channel steel 10B is longer than the web height of the channel steel 10A, As described above, the step B occurs at the joint between the channel steel 10A and the channel steel 10B. The stiffener 11 is made of an H-shaped steel, and the stiffener 11 extends in the horizontal direction so as to connect the channel steels 10A at both ends of the block b. The reinforcing plate 15 is made of a pentagonal steel material, and is disposed between the web of the channel steel 10A and the web of the H-shaped steel (stiffener) 11. The reinforcing plate 15 is located on the extension of the inner flange of the channel steel 10A joined back-to-back with the channel steel 10B, and one side thereof is in contact with the web surface of the H-shaped steel 11 via the relay plate 16.

なお、受圧部材１４を構成する部材の組合せや形態は上述の例に限定されるものではない。補強板１５は、柱の上下方向に連続する部材としても良い。すなわち、ブロックｂの溝型鋼１０Ａの内側フランジと対称な部材をブロックｃの溝型鋼１０Ｂのウェブ面に当接させるようにしても良い。スチフナー１１と補強板１５の関係は、上述の例のほか、スチフナー１１のケーシングに接しない外側のフランジ部と補強板１５とを接合するようにしても良い。また、中継板１６を省略しても良い。   The combination and form of the members constituting the pressure receiving member 14 are not limited to the above examples. The reinforcing plate 15 may be a member that is continuous in the vertical direction of the pillar. That is, a member symmetrical to the inner flange of the channel steel 10A of the block b may be brought into contact with the web surface of the channel steel 10B of the block c. The relationship between the stiffener 11 and the reinforcing plate 15 may be such that the outer flange portion of the stiffener 11 not in contact with the casing and the reinforcing plate 15 are joined in addition to the above-described example. Further, the relay plate 16 may be omitted.

以上説明したように、段差を持って連続する２つのブロックの溝型鋼１０Ａ，１０Ｂうち、排ガス１の流れ方向の下流側に位置する溝型鋼１０Ｂとスチフナー１１との結合部に補強板１５を介設し、これらスチフナー１１と補強板１５とで構成される受圧部材１４を溝型鋼１０Ａの内側フランジの延長線上に位置させると、地震時にケーシング２に前後方向（排ガス１の流れ方向）に沿う水平力が作用したとしても、その水平力を受圧部材１４で受け止めて耐震性を高めることができる。   As described above, the reinforcing plate 15 is provided at the joint between the stiffener 11 and the channel steel 10B located downstream in the flow direction of the exhaust gas 1 among the channel steels 10A and 10B of the two blocks continuous with a step. When the pressure-receiving member 14 composed of the stiffener 11 and the reinforcing plate 15 is positioned on the extension of the inner flange of the channel steel 10A, the casing 2 can be moved horizontally along the front-rear direction (flow direction of the exhaust gas 1) during an earthquake. Even if a force acts, the horizontal force can be received by the pressure receiving member 14 and the earthquake resistance can be improved.

なお、本発明は上記した実施形態に限定されず、本発明の要旨を逸脱しない範囲で種々の変形が可能であり、特許請求の範囲に記載された技術思想に含まれる技術的事項の全てが本発明の対象となる。前記実施形態は、好適な例を示したものであるが、当業者ならば、本明細書に開示の内容から、各種の代替例、修正例、変形例あるいは改良例を実現することができ、これらは添付の特許請求の範囲に記載された技術的範囲に含まれる。   It should be noted that the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the gist of the present invention, and all of the technical matters included in the technical idea described in the claims are described. The subject of the present invention. Although the embodiment shows a preferred example, those skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed in this specification, These are included in the technical scope described in the appended claims.

例えば、上記の実施形態では、各ブロックａ〜ｅに備えられる全ての溝型鋼１０がケーシング２の外側で面一となるように構成されているが、図７に示す変形例のように、背中合わせで接合される溝型鋼１０の内側フランジどうしが段差を持って連続していれば、溝型鋼１０の外側フランジについては面一になっていなくても良い。その際、ブロックｃに備えられる溝型鋼１０のように、任意のブロックの両端部をウェブ高さが異なる２本の溝型鋼１０で囲むようにしても良い。なお、この変形例においても、隣接するブロックの接合部の段差が大きい場合は、当該部位を前述したような受圧部材１４によって補強することが好ましい。   For example, in the above embodiment, all the channel steels 10 provided in each of the blocks a to e are configured to be flush with the outside of the casing 2. However, as in a modification shown in FIG. If the inner flanges of the channel steels 10 to be joined together are continuous with a step, the outer flanges of the channel steels 10 need not be flush. At that time, like the channel steel 10 provided in the block c, both ends of an arbitrary block may be surrounded by two channel steels 10 having different web heights. Also in this modified example, when the step at the joint of the adjacent blocks is large, it is preferable to reinforce the portion with the pressure receiving member 14 as described above.

また、上記の実施形態では、ウェブ高さの異なる２つの溝型鋼１０を背中合わせに接続することにより、互いの内側フランジが段差を持って連続するように構成されているが、各ブロックａ〜ｅに備えられる溝型鋼１０として全て同じウェブ高さのものを使用し、これら溝型鋼１０のウェブどうしを左右方向にずらして接合するようにしても良い。   Further, in the above-described embodiment, the two channel steels 10 having different web heights are connected back-to-back, so that the inner flanges are configured to be continuous with a step, but each of the blocks a to e. May be used as the channel steels 10 provided in the same, and the webs of the channel steels 10 may be joined to each other while being shifted in the left-right direction.

また、上記の実施形態では、ケーシング２の内部に過熱器３、第１の蒸発器４、脱硝装置５、第２の蒸発器６、節炭器７を配置した場合について説明したが、ケーシング２内に配置される熱交換器の種類や数量はこれに限定されず、例えば、過熱器３の上流側にダクトバーナーを配置して熱交換器での熱回収量増大を図るようにしても良い。この場合、ダクトバーナーは排ガスを再加熱する加熱手段であるため、ダクトバーナーを包囲するブロックに必要とされる保温材１３の厚みは、その下流側の過熱器３を包囲するブロックに必要とされる保温材１３の厚みよりも薄くなる。   In the above embodiment, the case where the superheater 3, the first evaporator 4, the denitration device 5, the second evaporator 6, and the economizer 7 are arranged inside the casing 2 has been described. The type and number of heat exchangers disposed inside the heat exchanger are not limited to the above. For example, a duct burner may be disposed upstream of the superheater 3 to increase the amount of heat recovered in the heat exchanger. . In this case, since the duct burner is a heating means for reheating the exhaust gas, the thickness of the heat insulating material 13 required for the block surrounding the duct burner is required for the block surrounding the superheater 3 on the downstream side. The thickness of the heat insulating material 13 becomes thinner.

１ 排ガス
２ ケーシング
３ 過熱器（熱交換器）
４ 第１の蒸発器（熱交換器）
５ 脱硝装置
６ 第２の蒸発器（熱交換器）
７ 節炭器（熱交換器）
１０，１０Ａ，１０Ｂ 溝型鋼
１１ スチフナー
１２ インナーケース
１３ 保温材
１４ 受圧部材
１５ 補強板
１６ 中継板
ａ，ｂ，ｃ，ｄ，ｅ ブロック
Ｂ 段差 1 Exhaust gas 2 Casing 3 Superheater (heat exchanger)
4 First evaporator (heat exchanger)
5 Denitration device 6 Second evaporator (heat exchanger)
7 Economizer (heat exchanger)
10, 10A, 10B Channel steel 11 Stiffener 12 Inner case 13 Heat insulating material 14 Pressure receiving member 15 Reinforcement plate 16 Relay plate a, b, c, d, e Block B Step

Claims (4)

ガスタービンからの排ガスが導かれるケーシングと、前記ケーシングの内面側を覆う保温材と、前記ケーシングの内部に配置された熱交換器とを備え、前記ケーシングが排ガスの流れ方向に沿って複数のブロックに分割されている排熱回収ボイラにおいて、
前記ブロックを排ガスの流れ方向に沿う両端部が溝型鋼で囲まれた壁面構造となし、
隣接する前記ブロックに備えられる前記溝型鋼のウェブどうしを、互いの内側フランジが段差を持って連続するように接続すると共に、厚み寸法が異なる前記保温材を前記段差によって生じた隙間に配置することにより、前記熱交換器に対向する前記保温材の内面側が面一となるように構成したことを特徴とする排熱回収ボイラ。 A casing through which exhaust gas from the gas turbine is guided, a heat insulating material that covers an inner surface side of the casing, and a heat exchanger disposed inside the casing, wherein the casing includes a plurality of blocks along a flow direction of the exhaust gas. In the waste heat recovery boiler divided into
Both ends of the block along the flow direction of the exhaust gas have a wall structure surrounded by channel steel,
Connecting the grooved steel webs provided in the adjacent blocks so that their inner flanges are continuous with each other with a step, and disposing the heat insulating materials having different thickness dimensions in the gap generated by the step. The heat recovery material boiler is characterized in that the inner surface side of the heat insulator facing the heat exchanger is flush with the heat exchanger. 請求項１に記載の排熱回収ボイラにおいて、
ウェブの高さ寸法が異なる２種類の前記溝型鋼を用い、これら溝型鋼の外側フランジどうしが面一となるように隣接する前記ブロックを接続したことを特徴とする排熱回収ボイラ。 The exhaust heat recovery boiler according to claim 1,
An exhaust heat recovery boiler wherein two types of said channel steels having different web height dimensions are used, and said adjacent blocks are connected so that outer flanges of these channel steels are flush with each other. 請求項１または２に記載の排熱回収ボイラにおいて、
前記段差を介して接続された一対の前記ブロックのうち、排ガスの流れ方向の下流側に位置する前記ブロックは、相対向する前記溝型鋼のウェブ間を連結する受圧部材を備えており、
前記受圧部材が、排ガスの流れ方向の上流側に位置する前記ブロックに設けられた前記内側フランジの延長線上に配置されていることを特徴とする排熱回収ボイラ。 The exhaust heat recovery boiler according to claim 1 or 2,
Of the pair of blocks connected via the step, the block located on the downstream side in the flow direction of the exhaust gas includes a pressure receiving member that connects between the opposed webs of the channel steel,
The exhaust heat recovery boiler, wherein the pressure receiving member is disposed on an extension of the inner flange provided on the block located on the upstream side in the flow direction of the exhaust gas. 請求項３に記載の排熱回収ボイラにおいて、
前記受圧部材がＨ型鋼と補強板との組合体からなり、
前記Ｈ型鋼がフランジを排ガスの流れ方向に向けて配置されていると共に、前記補強板が前記溝型鋼のウェブと前記Ｈ型鋼のウェブとの間に配置されていることを特徴とする排熱回収ボイラ。 The exhaust heat recovery boiler according to claim 3,
The pressure receiving member is formed of a combination of an H-shaped steel and a reinforcing plate,
The exhaust heat recovery, wherein the H-shaped steel is disposed with the flange directed in the flow direction of the exhaust gas, and the reinforcing plate is disposed between the web of the channel steel and the web of the H-shaped steel. boiler.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63183302A (en) * 1987-01-27 1988-07-28 バブコツク日立株式会社 Waste heat boiler
JP2002168403A (en) * 2000-11-30 2002-06-14 Mitsubishi Heavy Ind Ltd Exhaust heat recovery steam generator
WO2005012791A1 (en) * 2003-07-30 2005-02-10 Babcock-Hitachi Kabushiki Kaisha Heat transfer tube panel module and method of constructing exhaust heat recovery boiler using the module

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3373771B2 (en) * 1997-10-08 2003-02-04 株式会社東芝 Waste heat recovery boiler
JP6267028B2 (en) * 2014-03-24 2018-01-24 三菱日立パワーシステムズ株式会社 Exhaust heat recovery device, gas turbine plant equipped with the same, and exhaust heat recovery method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63183302A (en) * 1987-01-27 1988-07-28 バブコツク日立株式会社 Waste heat boiler
JP2002168403A (en) * 2000-11-30 2002-06-14 Mitsubishi Heavy Ind Ltd Exhaust heat recovery steam generator
WO2005012791A1 (en) * 2003-07-30 2005-02-10 Babcock-Hitachi Kabushiki Kaisha Heat transfer tube panel module and method of constructing exhaust heat recovery boiler using the module

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