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KR102166529B1 - Bundle Header for Gas Preheater - Google Patents

Bundle Header for Gas Preheater Download PDF

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Publication number
KR102166529B1
KR102166529B1 KR1020190005094A KR20190005094A KR102166529B1 KR 102166529 B1 KR102166529 B1 KR 102166529B1 KR 1020190005094 A KR1020190005094 A KR 1020190005094A KR 20190005094 A KR20190005094 A KR 20190005094A KR 102166529 B1 KR102166529 B1 KR 102166529B1
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header
tube
bundle
nozzle
flange
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KR20200088610A (en
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우종인
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비에이치아이 주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0256—Arrangements for coupling connectors with flow lines
    • 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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0024—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for combustion apparatus, e.g. for boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2230/00—Sealing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding

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  • Engineering & Computer Science (AREA)
  • 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)

Abstract

본 발명은 보일러 가스예열기의 상부 헤더와 튜브 상단의 결합구조 개선으로 문제가 발생한 튜브에 대한 정비작업의 신속성 추구 및 가스 예열기의 가동중지 시간단축에 따른 가동 효율성의 증진, 하부 헤더측 헤더 노즐의 실링구조 개선으로 열팽창으로 인한 응력의 영향이 헤더 노즐의 변형방지와 밀봉 안정성을 강화할 수 있는 가스 예열기용 번들을 제공하려는 것으로서, 튜브 상단이 용접된 튜브 시트를 케이싱의 천장에 형성된 케이싱 플랜지에 얹고, 상기 튜브 시트 위에 상부 헤더의 중공형 헤더 플랜지를 중첩시킨 다음에 케이싱 플랜지와 튜브 시트 및 헤더 플랜지의 체결공을 일치시키고 보울트로 체결한 상부 헤더 - 튜브 시트 탈착형으로 이루어 지고, 하부 헤더의 번들 노즐은 상판에 노즐공이 뚫린 슬리브의 노즐공에 하향 관통시켜 용접하며, 실링 본체 내에 형성된 환상 패킹좌에 그랜드 링패킹을 삽입하고 푸시 플레이트가 그랜드 링패킹을 강화하면서 튜브의 팽창 및 수축시의 변형압력이 번들 노즐의 승강으로 소산되도록 한 가스 예열기용 번들 헤더를 특징으로 한다.The present invention seeks to expedite maintenance work for the tube in question by improving the coupling structure between the upper header of the boiler gas preheater and the upper end of the tube, and improves operation efficiency by reducing the shutdown time of the gas preheater, and sealing the header nozzle on the lower header side. It is intended to provide a bundle for a gas preheater that can prevent deformation of the header nozzle and enhance sealing stability due to structural improvement due to the effect of stress due to thermal expansion.The tube sheet with the top of the tube welded is placed on the casing flange formed on the ceiling of the casing, and the After overlapping the hollow header flange of the upper header on the tube sheet, the upper header that matches the fastening holes of the casing flange, the tube sheet, and the header flange, and fastened with a bowl-consists of a tube sheet detachable type, and the bundle nozzle of the lower header is It is welded by penetrating downward into the nozzle hole of the sleeve with the nozzle hole drilled on the top plate, and the grand ring packing is inserted into the annular packing seat formed in the sealing body, and the push plate reinforces the grand ring packing, and the deformation pressure during expansion and contraction of the tube is bundled. It features a bundle header for a gas preheater to be dissipated by raising and lowering the nozzle.

Description

가스 예열기용 번들 헤더{Bundle Header for Gas Preheater}Bundle Header for Gas Preheater {Bundle Header for Gas Preheater}

본 발명은 발전보일러용 가스예열기의 상부 헤더 구조를 개선하여 제작과 수압시험, 설비 운전 중에 튜브에 균열이 발생했을 때 그 수정 작업시간의 단축과 작업의 효율성을 증대시키고, 하부 헤더의 구조 개선과 번들 노즐용 밀폐수단의 개선으로 튜브의 팽창 및 수축압력을 번들 노즐이 소산시켜 튜브와 번들 노즐의 변형을 방지할 수 있게 한 가스 예열기용 번들 헤더에 관한 것이다.The present invention improves the structure of the upper header of the gas preheater for power generation boilers to shorten the correction work time and increase the efficiency of work when a crack occurs in the tube during manufacturing, hydraulic test, and equipment operation, and improve the structure of the lower header. The present invention relates to a bundle header for a gas preheater capable of preventing deformation of the tube and the bundle nozzle by dissipating the expansion and contraction pressure of the tube by improving the sealing means for the bundle nozzle.

가스 예열기는, 도 1에서 보듯이, 발전보일러의 연료인 부생가스(BFG, FOG)를 응축기로 응축시켜 발생하는 응축수를 증발기로 통과하는 연소가스의 열로 승온시켜 증기화함으로써 발전효율을 향상시키는 장비로서, 튜브와 헤더로 열교환하는 번들과 연료 및 배가스가 통과하는 케이싱으로 구성되며, 배가스 및 연료와 증기 그리고 응축수를 각각 분리 운전하는 밀폐형 자연 순환열교환기이다.As shown in Fig. 1, the gas preheater is an equipment that improves power generation efficiency by evaporating the condensed water generated by condensing by-product gas (BFG, FOG), which is the fuel of a power generation boiler with a condenser, to heat of combustion gas passing through the evaporator. It is a closed type natural circulation heat exchanger that is composed of a bundle that exchanges heat between a tube and a header and a casing through which fuel and exhaust gas passes, and separates the exhaust gas, fuel, steam, and condensate.

도 2, 도 3, 도 4는 기존 가스 예열기의 구조에서 번들 튜브의 상, 하부 헤더의 구조를 일부 발췌 도시한 것이다.2, 3, and 4 are partial excerpts of the structure of the upper and lower headers of the bundle tube from the structure of the conventional gas preheater.

도 2에서 보듯이, 가스 예열기는 배가스가 통과하는 케이싱(1)과 그 내부에 설치된 튜브 번들(2)을 나타낸 것으로, 상부 번들(3)에 설치된 번들 노즐(4)로 증기가 공급되고, 그 증기의 현열은 튜브(5)의 전열면을 통하여 케이싱(1) 내에서 배가스와 열교환되어 배가스를 승온시키며, 열교환된 증기는 응축수로 응집되어 하부 번들(6)을 통해서 배출된다.As shown in Fig. 2, the gas preheater shows the casing 1 through which exhaust gas passes and the tube bundle 2 installed therein, and steam is supplied to the bundle nozzle 4 installed in the upper bundle 3, and The sensible heat of the steam is heat-exchanged with the exhaust gas in the casing 1 through the heat transfer surface of the tube 5 to raise the temperature of the exhaust gas, and the heat-exchanged steam is condensed into condensed water and discharged through the lower bundle 6.

도 3에서와 같이, 종래의 상부 헤더(8)는 그 하단에 부착된 번들 플랜지(13)에 튜브(5)의 상단을 용접하고, 케이싱(1)의 천장에 마련된 케이싱 플렌지(11)의 상단에 번들 플랜지(13)를 얹은 다음에 보울트로 체결하였다.As shown in FIG. 3, in the conventional upper header 8, the upper end of the tube 5 is welded to the bundle flange 13 attached to the lower end thereof, and the upper end of the casing flange 11 provided on the ceiling of the casing 1 The bundle flange 13 was mounted on and then fastened with a bowl.

발전보일러 운전 중에 알 수 없는 원인으로 튜브가 파공되는 등의 문제가 발생한 경우에는 가스 예열기의 가동을 일시 중지하고 헤더를 분리하여 튜브를 수정해야 하는데, 그러려면 번들 플랜지(13)와 튜브(5)의 상단을 접합한 용접부를 절단하는 작업이 선행되어야 했다. In the event of a problem such as a tube breakage due to an unknown cause during operation of the power generation boiler, the operation of the gas preheater must be temporarily stopped and the header removed to modify the tube. To do this, the bundle flange (13) and tube (5) The work of cutting the weld that joined the upper end had to be preceded.

상기 종래 구조에서의 문제점은 용접부를 절단하는 데 걸리는 시간이 길어 튜브를 수정하는 작업이 매우 더디고, 가스 예열기의 가동중지시간도 길어 가동효율이 저하된다는 점이다.The problem with the conventional structure is that the operation of modifying the tube is very slow because it takes a long time to cut the welding part, and the operation efficiency is lowered due to the long downtime of the gas preheater.

또, 도 4에서 보듯이, 종래의 하부 헤더(9)에는 번들 노즐(12)이 설치되어 있다. 가스 예열기 운전 중에 튜브가 열팽창되면 하부 헤더(9)에 좋지 못한 영향을 끼친다. 열응력으로 인하여 튜브(5)가 팽창 및 수축될 때 그 변형압력이 번들 노즐(12)에 전달되지만 번들 노즐(12)이 케이싱(1)의 바닥에 용접되어 구속되어있기 때문에 이들 간의 연결부 및 여타 용접부에 좋지 못한 영향을 끼치기도 한다.In addition, as shown in Fig. 4, a bundle nozzle 12 is installed in the conventional lower header 9. If the tube is thermally expanded during operation of the gas preheater, it adversely affects the lower header 9. When the tube 5 expands and contracts due to thermal stress, the deformation pressure is transmitted to the bundle nozzle 12, but since the bundle nozzle 12 is welded and constrained to the bottom of the casing 1, the connection between them and other It can also adversely affect the weld.

등록실용신안 제20-0486194호Registered Utility Model No. 20-0486194

본 발명은 상부 헤더와 튜브 상단의 결합구조 개선으로 문제가 발생한 튜브에 대한 정비작업의 신속성 추구 및 가스 예열기의 가동중지 시간단축에 따른 가동 효율성의 증진, 그리고 하부 헤더측 번들 노즐의 실링구조 개선으로 번들 노즐의 승강압력을 슬리브의 승강 작동으로 소산시켜 튜브와 번들 노즐의 변형을 방지하고, 그러면서도 번들 노즐측의 밀봉성이 유지될 수 있는 가스 예열기용 번들을 제공하는 것을 목적으로 한다.The present invention improves the coupling structure between the upper header and the top of the tube, pursuing quick maintenance work for the tube in question, and improving the operation efficiency by reducing the shutdown time of the gas preheater, and improving the sealing structure of the bundle nozzle on the lower header side. An object of the present invention is to provide a bundle for a gas preheater capable of preventing deformation of the tube and the bundle nozzle by dissipating the lifting pressure of the bundle nozzle by the lifting operation of the sleeve, and maintaining the sealing property of the bundle nozzle side.

상기 목적을 달성하기 위해서 본 발명은, 튜브 상단이 용접된 튜브 시트를 케이싱의 상단에 부착된 플랜지에 얹고, 상기 튜브 시트 위에 하부 헤더의 헤더 플랜지를 중첩시킨 다음에 케이싱측 플랜지와 튜브 시트 및 헤더 플랜지의 체결공을 일치시켜 보울트로 체결한 하부 헤더로부터 튜브 시트가 분리되는 탈착형으로 하며, 케이싱 바닥의 노즐공을 관통한 하부 헤더의 번들 노즐은 상판에 노즐공이 뚫린 슬리브의 노즐공에 하향 관통시켜 용접하고, 실링 본체의 내주면에 형성된 환상 패킹좌에 그랜드 링패킹을 삽입하여 푸시 플레이트로 그랜드 링패킹의 밑을 강하게 압박하도록 실링 본체에 체결하여 번들 노즐의 밀폐성을 강화하고 그랜드 링패킹 내에서 번들 노즐이 승강할 수 있게 한 가스 예열기용 번들 헤더로 구성한 것을 특징으로 한 것이다.In order to achieve the above object, the present invention is to mount a tube sheet with a tube top welded on a flange attached to the top of the casing, and overlap the header flange of the lower header on the tube sheet, and then the casing side flange, the tube sheet, and the header. It is a detachable type in which the tube sheet is separated from the lower header fastened with a bowl by matching the fastening holes of the flange, and the bundle nozzle of the lower header penetrating through the nozzle hole at the bottom of the casing penetrates downward through the nozzle hole of the sleeve with the nozzle hole drilled in the upper plate. It is welded, and the gland ring packing is inserted into the annular packing seat formed on the inner circumferential surface of the sealing body, and fastened to the sealing body to strongly press the bottom of the gland ring packing with a push plate to strengthen the sealing of the bundle nozzle and bundle it within the gland ring packing. It is characterized by consisting of a bundle header for a gas preheater that allows the nozzle to move up and down.

본 발명에 의하면, 하부 헤더에서 보울트를 풀면 헤더 플랜지와 튜브 시트가 케이싱의 플랜지에서 분리되고, 이렇게 분리한 후에 가스 예열기 운전 중에 하자가 발견된 튜브에 대한 정비작업에 즉각 임할 수 있으므로 종래의 용접형 하부 헤더와 튜브 시트의 용접부를 절단하고 문제가 발생한 튜브를 정비하던 것에 비해서 튜브 정비작업이 매우 신속하고 간편하며, 가스 예열기의 가동 중지 시간이 짧아지느니만치 가스 예열기의 가동효율도 높다.
또, 케이싱의 바닥에 하부 헤더의 번들 노즐을 용접했던 종래와는 달리, 케이싱의 바닥 저면에 부착된 실링장치, 즉 실링 본체 내에 삽입된 그랜드 링패킹을 푸시 플레이트로 압박해 번들 노즐의 외주면에 대한 밀봉기능을 발휘하도록 체결한 비용접식 탈착형 실링장치는 튜브가 열팽창되거나 냉각 수축될 때 그 변화량에 영향을 받을 수밖에 없는 하부 헤더측 번들 노즐의 승강압력을 그랜드 링패킹 내에서 슬리브가 승강되면서 소산시킨다. 즉, 열 응력에 따라 튜브가 신축될 때 그 신축력은 번들 노즐에 전가되어 승강되려는 힘으로 작용하고, 그 승강력은 슬리브가 그랜드 링패킹 내에서 오르내림(상하 슬라이딩)으로 튜브, 나아가서는 번들 노즐에 가해지는 변형압력을 소산시킨다. 그 결과, 번들 노즐이 열팽창으로 인해 늘어나거나 수축되는 변형이 일어나지 않는다. 튜브도 마찬가지다.
그러한 슬리브의 승강에도 실링장치에 의한 밀폐성은 변함이 없어 번들 노즐과 케이싱 바닥의 노즐공을 통한 가스누출현상도 철저히 방지된다.According to the present invention, when the bolt is released from the lower header, the header flange and the tube sheet are separated from the flange of the casing, and after this separation, it is possible to immediately perform maintenance work on the tube found to be defective during operation of the gas preheater. Compared with cutting the welded part of the lower header and the tube sheet to repair the tube in question, the tube maintenance work is very quick and simple, and the gas preheater's operation efficiency is high as the downtime of the gas preheater is shortened.
In addition, unlike the prior art in which the bundle nozzle of the lower header was welded to the bottom of the casing, the sealing device attached to the bottom of the casing, that is, the gland ring packing inserted in the sealing body, is pressed with a push plate to the outer circumferential surface of the bundle nozzle. The non-contact detachable sealing device fastened to exhibit the sealing function dissipates the lifting pressure of the bundle nozzle on the lower header side, which is inevitably affected by the change when the tube is thermally expanded or cooled and contracted, as the sleeve is raised and lowered within the grand ring packing. . That is, when the tube is stretched and contracted according to thermal stress, the stretching force is transferred to the bundle nozzle and acts as a force to be raised and lowered, and the lifting force is applied to the tube as the sleeve moves up and down (up and down sliding) within the grand ring packing. Dissipates the applied deformation pressure. As a result, deformation in which the bundle nozzle is stretched or contracted due to thermal expansion does not occur. The same goes for the tube.
Even when the sleeve is raised and lowered, the sealing property by the sealing device is not changed, so that gas leakage through the nozzle hole in the bundle nozzle and the casing bottom is also thoroughly prevented.

삭제delete

삭제delete

도 1은 가스 예열기의 개념도
도 2는 종래 가스 예열기의 발췌도
도 3은 종래 가스 예열기의 상부 헤더 상세도
도 4는 종래 가스 예열기의 하부 헤더 상세도
도 5는 본 발명에 의한 가스 예열기의 상부 헤더 상세도
도 6은 본 발명에 의한 가스 예열기의 하부 헤더 상세도
도 7은 하부 헤더용 노즐 밀봉장치의 분해도1 is a conceptual diagram of a gas preheater
2 is an excerpt of a conventional gas preheater
3 is a detailed view of an upper header of a conventional gas preheater
4 is a detailed view of a lower header of a conventional gas preheater
5 is a detailed view of the upper header of the gas preheater according to the present invention
6 is a detailed view of the lower header of the gas preheater according to the present invention
7 is an exploded view of a nozzle sealing device for a lower header

본 발명의 바람직한 실시예를 토대로 작성한 도 5 이하의 도면을 참조하여 본 발명을 구체적으로 설명한다.The present invention will be described in detail with reference to the drawings below in FIG. 5 made based on a preferred embodiment of the present invention.

우선, 본 발명은 195℃에 달하는 보일러의 배가스를 가스 예열기의 증발기로 통과시켜 회수되는 현열로 증기를 발생시켜 응축기에 공급함으로써 부생가스를 30℃에서 100℃ 수준으로 상승시켜 보일러의 효율을 높이고, 발전에너지도 절감하는 데 적합한 가스 예열기용 번들 헤더에 초점을 맞춘다.First, the present invention increases the efficiency of the boiler by raising the by-product gas from 30°C to 100°C level by generating steam with sensible heat recovered by passing the exhaust gas of the boiler reaching 195°C to the evaporator of the gas preheater and supplying it to the condenser, It focuses on bundle headers for gas preheaters, which are also suitable for saving power generation energy.

도 5는 본 발명의 상부 헤더(8)를 구체적으로 설명하기 위한 확대도이다.5 is an enlarged view for specifically explaining the upper header 8 of the present invention.

본 발명은 도 5에서와 같이 상부 헤더(8)의 하단에는 번들 플랜지(13)를 부착하고, 튜브(2)의 상단이 관통하도록 지지된 튜브 시트(10)를 케이싱 플랜지(11)에 얹은 다음에 상기 케이싱 플랜지(11) 위에 상기 번들 플랜지(13)를 얹고 보울트로 체결한다.In the present invention, as shown in Fig. 5, a bundle flange 13 is attached to the lower end of the upper header 8, and the tube sheet 10 supported so that the upper end of the tube 2 passes through is placed on the casing flange 11 The bundle flange 13 is placed on the casing flange 11 and fastened with a bowl.

가스 예열기 가동 중에 튜브 파공 등의 문제가 발생한 경우에는 보울트를 풀어 케이싱 플랜지(11)에서 번들 플랜지(13)와 번들 노즐(4)이 딸린 상부 헤더(8)를 분리하고, 문제가 발생한 튜브를 정비한다.If a problem such as tube puncture occurs while the gas preheater is running, unscrew the bolt and remove the bundle flange 13 and the upper header 8 with the bundle nozzle 4 from the casing flange 11, and repair the tube with the problem. do.

이를 케이싱 플랜지와 튜브 시트를 직결하던 종래의 가스 예열기용 번들 헤더에 비하면 본 발명은 상부 헤더(8)에서 튜브(5)의 상단을 절단하지 않고도 신속 간편하게 튜브 정비작업을 수행할 수 있다.Compared to the bundle header for a conventional gas preheater that directly connects the casing flange and the tube sheet, the present invention can quickly and conveniently perform the tube maintenance work without cutting the upper end of the tube 5 in the upper header 8.

도 6 및 도 7은 본 발명의 하부 헤더(9)를 구체적으로 설명하기 위한 확대도와 분해도이다.6 and 7 are enlarged and exploded views for specifically explaining the lower header 9 of the present invention.

본 발명은 도 6과 같이, 배가스가 통과하는 케이싱(1)은 밀폐되어야 하므로 중앙에 노즐공이 천공된 평판에 부착된 슬리브(15)의 노즐공에 외부 배관이 연결되는 하부 헤더(9)에 딸린 번들 노즐(12)을 내리 끼우고 용접하여 밀봉한다.In the present invention, as shown in FIG. 6, the casing 1 through which the exhaust gas passes must be sealed, so the outer pipe is attached to the lower header 9 connected to the nozzle hole of the sleeve 15 attached to the flat plate with the nozzle hole perforated in the center. The bundle nozzle 12 is put down and sealed by welding.

그리고 상기 슬리브(15)에 실링 본체(14)를 씌우고, 상기 슬리브(15)와 실링 본체(14)의 내주면에 형성된 환상 패킹좌(18)에 그랜드 링패킹(16)을 삽입한다.Then, the sealing body 14 is covered with the sleeve 15, and the ground ring packing 16 is inserted into the sleeve 15 and the annular packing seat 18 formed on the inner circumferential surface of the sealing body 14.

상기 그랜드 링패킹(16)의 내주면은 상기 슬리브(15)의 외주면에 밀착될 수 있는 내경을 갖는다.The inner circumferential surface of the grand ring packing 16 has an inner diameter capable of being in close contact with the outer circumferential surface of the sleeve 15.

그리고, 상기 그랜드 링패킹(16)을 실링 본체(14)의 패킹좌(18)에 삽입하고, 실링 본체(14)의 저면에 푸시 플레이트(17)의 상단을 밀착시킨 다음에 실링 본체(14)의 플랜지와 푸시 플레이트(17) 하단의 외향 플랜지에 천공된 체결공을 일치시킨 후 보울트(20)로 체결하여 푸시 플레이트(17)로 하여금 그랜드 링패킹(16)을 강하게 압박하게 함으로써 실링 본체(14)와 상기 슬리브(15)간을 빈틈없이 틀어막아 번들 노즐의 밀폐성을 강화한다.Then, the ground ring packing 16 is inserted into the packing seat 18 of the sealing body 14, and the upper end of the push plate 17 is in close contact with the bottom surface of the sealing body 14, and then the sealing body 14 The sealing body 14 is fastened with a bolt 20 to force the push plate 17 to strongly press the ground ring packing 16 after matching the fastening hole drilled in the outer flange of the bottom of the push plate 17 and the flange of the push plate 17. ) And the sleeve 15 to enhance the sealing of the bundle nozzle.

튜브(5)가 열응력에 의해 신축될 때 그 신축력은 번들 노즐(12)에 곧장 전달되고, 슬리브(15)에도 그대로 전가된다. 이는 실링 본체(14)내에서 슬리브(15)의 승강력(상하 슬라이딩)으로 작용하여 튜브(5)와 번들 노즐(12)에 가해지는 변형압력이 소산되어진다.When the tube 5 is stretched and contracted by the thermal stress, the stretching force is transferred directly to the bundle nozzle 12 and is transferred to the sleeve 15 as it is. This acts as an elevating force (up and down sliding) of the sleeve 15 in the sealing body 14 to dissipate the deformation pressure applied to the tube 5 and the bundle nozzle 12.

그 결과 튜브(5)와 번들 노즐(12)이 열팽창으로 인해 늘어나려거나 수축되려는 변형압력이 해소되어 안전해지고, 그러면서도 슬리브(15)에 대한 그랜드 링패킹(16)의 밀봉기능은 변함없이 발휘되어 케이싱 내의 배가스가 번들 노즐(12)쪽으로 누설되지 못하게 방지된다.As a result, the deformation pressure of the tube 5 and the bundle nozzle 12 to be stretched or contracted due to thermal expansion is relieved, making it safe, while the sealing function of the gland ring packing 16 to the sleeve 15 is unchanged, and the casing The exhaust gas inside is prevented from leaking toward the bundle nozzle 12.

1: 케이싱
2: 튜브 번들
3: 상부 번들
4: (상부 헤더용) 번들 노즐
6: 하부 번들
8: 상부 헤더
9: 하부 헤더
10: 튜브 시트
11: 케이싱 플랜지
12: (하부 헤더용) 번들 노즐
13: 번들 플랜지
14: 실링 본체
15: 슬리브
16: 그랜드 링패킹
17: 푸시 플레이트
18: 패킹좌1: casing
2: tube bundle
3: upper bundle
4: (for upper header) bundle nozzle
6: lower bundle
8: upper header
9: lower header
10: tube sheet
11: casing flange
12: (for lower header) bundle nozzle
13: bundle flange
14: sealing body
15: sleeve
16: Grand ring packing
17: push plate
18: packing seat

Claims (1)

튜브의 상단이 용접된 튜브 시트를 케이싱의 플랜지 밑에 밀착시켜 보울트로 체결하고, 상기 튜브 시트 위에 하부 헤더의 플랜지를 중첩시키고 케이싱의 플랜지와 튜브 시트 및 하부 헤더의 플랜지측 체결공을 일치시켜 보울트로 체결하는 하부 헤더와 튜브 시트가 탈착형으로 이루어지고, 하부 헤더의 번들 노즐은 케이싱의 바닥을 하향 관통시킨 후 상판에 노즐공이 뚫린 슬리브의 노즐공으로 하향 관통시켜 용접하며, 실링 본체에 형성된 환상 패킹좌에 그랜드 링패킹을 삽입하고, 푸시 플레이트는 그랜드 링패킹의 밑을 압박하도록 실링 본체에 체결하여 하부 헤더의 번들 노즐의 밀폐성을 강화하는 동시에 튜브의 팽창 및 수축 시의 압력이 상부 헤더의 번들 노즐의 승강에 의해 소산되도록 한 것을 특징으로 하는 가스 예열기용 번들 헤더.The tube sheet to which the top of the tube is welded is closely attached to the bottom of the flange of the casing and fastened with a bowl, and the flange of the lower header is overlaid on the tube sheet, and the flange of the casing matches the flange-side fastening hole of the tube sheet and the lower header into a bowl. The lower header and the tube sheet to be fastened are detachable, and the bundle nozzle of the lower header penetrates downward through the nozzle hole of the sleeve with the nozzle hole drilled in the upper plate after passing downward through the bottom of the casing, and is welded to the annular packing seat formed in the sealing body. The gland ring packing is inserted into the gland ring packing, and the push plate is fastened to the sealing body to press the bottom of the gland ring packing to reinforce the airtightness of the bundle nozzle of the lower header. At the same time, the pressure during expansion and contraction of the tube is reduced from the bundle nozzle of the upper header. Bundle header for a gas preheater, characterized in that dissipated by lifting and lowering.
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JP2001031982A (en) 1999-07-19 2001-02-06 Japan Gas Association Heat exchanger and coal gasifier using the heat exchanger
JP2016061542A (en) 2014-09-22 2016-04-25 ニッシンコーポレーション株式会社 Exhaust gas heat exchanger

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DE60324626D1 (en) * 2002-04-23 2008-12-24 Exxonmobil Res & Eng Co Heat exchanger with floating end box
ITMI20031268A1 (en) * 2003-06-24 2004-12-25 Italprotec S A S Di Cotogni Carla E C TUBE BAND HEAT EXCHANGER.
KR200486194Y1 (en) 2016-12-29 2018-04-12 한국남동발전 주식회사 Valve system to isolate each tube of non-leakage gas-gas heater for desulfurizer in a power plant

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Publication number Priority date Publication date Assignee Title
JP2001031982A (en) 1999-07-19 2001-02-06 Japan Gas Association Heat exchanger and coal gasifier using the heat exchanger
JP2016061542A (en) 2014-09-22 2016-04-25 ニッシンコーポレーション株式会社 Exhaust gas heat exchanger

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