TW201434728A - Corrosion control method for heat exchanger and corrosion control structure for heat exchanger - Google Patents

Corrosion control method for heat exchanger and corrosion control structure for heat exchanger Download PDF

Info

Publication number
TW201434728A
TW201434728A TW103104704A TW103104704A TW201434728A TW 201434728 A TW201434728 A TW 201434728A TW 103104704 A TW103104704 A TW 103104704A TW 103104704 A TW103104704 A TW 103104704A TW 201434728 A TW201434728 A TW 201434728A
Authority
TW
Taiwan
Prior art keywords
heat transfer
transfer tube
sleeve
corrosion
fixing member
Prior art date
Application number
TW103104704A
Other languages
Chinese (zh)
Other versions
TWI520894B (en
Inventor
Nobutaka FUKAMI
Mobutaka Fujii
Shuji Takada
Original Assignee
Sumitomo Heavy Industries
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 Sumitomo Heavy Industries filed Critical Sumitomo Heavy Industries
Publication of TW201434728A publication Critical patent/TW201434728A/en
Application granted granted Critical
Publication of TWI520894B publication Critical patent/TWI520894B/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
    • F28F21/083—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys from stainless steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • 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
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • 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
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F28F9/185—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding with additional preformed parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/14—Heat exchangers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys

Landscapes

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

Abstract

A corrosion control method for a heat exchanger equipped with heat transfer pipes which exchange heat with a gas flowing in a flow path on the inside of heat transfer pipe securing members, wherein a configuration is adopted whereby the heat transfer pipes are equipped with cylindrical sleeves inserted or fitted around the outside of the heat transfer pipes, and the heat transfer pipes and/or the sleeves are moved relative to the heat transfer pipe securing members.

Description

熱交換器的防腐方法及熱交換器的防腐構造 Anticorrosion method of heat exchanger and anticorrosive structure of heat exchanger

本發明係有關一種熱交換器的防腐方法以及熱交換器的防腐構造。 The present invention relates to a method of preserving a heat exchanger and a corrosion protection structure of the heat exchanger.

例如鍋爐等中附設有用於回收在火爐產生之燃燒廢氣的熱量之熱交換器。該熱交換器中，藉由相對向配置平板狀管板而在管板彼此間形成燃燒廢氣的流路，配置複數個傳熱管以和流過該些管板彼此間之燃燒廢氣的流動正交，並且如以下專利文獻1所記載，廣泛已知有使該等傳熱管的兩側貫穿於與該傳熱管正交之上述兩管板，並藉由焊接固定管板與傳熱管之構成。 For example, a heat exchanger for recovering heat of combustion exhaust gas generated in a furnace is attached to a boiler or the like. In the heat exchanger, a plurality of heat transfer tubes are arranged to flow the combustion exhaust gas flowing between the tube sheets by forming a flow path for burning exhaust gas between the tube sheets in a direction in which the flat tube sheets are arranged. In addition, as described in the following Patent Document 1, it is widely known that both sides of the heat transfer tubes are inserted through the two tube sheets orthogonal to the heat transfer tubes, and the tube sheets and the heat transfer tubes are fixed by welding. The composition.

在此，以下非專利文獻1中記載有：在與燃燒廢氣進行熱交換而預熱空氣之氣體式空氣預熱器(Gas Air Heater)中，若燃燒廢氣中含有SOX、HCl，則在傳熱管的尤其在空氣(預熱空氣)入口側的位置，由於因硫酸露點、鹽酸露點引起的結露而產生低溫腐蝕即硫酸露點腐蝕、鹽酸露點腐蝕。 In the following description, in the gas air preheater (Gas Air Heater) that performs heat exchange with the combustion exhaust gas and preheats the air, if the combustion exhaust gas contains SO X or HCl, it is transmitted. The position of the heat pipe, especially at the inlet side of the air (preheated air), is low temperature corrosion due to dew condensation caused by sulfuric acid dew point and hydrochloric acid dew point, that is, sulfuric acid dew point corrosion, hydrochloric acid dew point corrosion.

若上述在傳熱管上產生酸露點腐蝕而管壁變薄時，則 最壞會導致開孔，因此需要在此之前更換傳熱管。此時，一般藉由例如研磨機等去除接合管板與傳熱管的焊接部，並與新的傳熱管進行更換。 If the above-mentioned acid dew corrosion occurs on the heat transfer tube and the tube wall becomes thin, then The worst result is the opening, so the heat transfer tube needs to be replaced before then. At this time, the welded portion of the joint tube sheet and the heat transfer tube is generally removed by, for example, a grinder or the like, and replaced with a new heat transfer tube.

又，以下非專利文獻2中記載有：在例如與燃燒廢氣進行熱交換而預熱空氣之氣體式空氣預熱器(Gas Air Heater)中，若燃燒廢氣中含有SOX、HCl，則在傳熱管上，由於硫酸露點、鹽酸露點引起的結露而產生低溫腐蝕即硫酸露點腐蝕、鹽酸露點腐蝕，但藉由將新S-TEN1鋼管(登錄商標)使用於傳熱管，能夠防止上述酸露點腐蝕。 Further, in the following Non-Patent Document 2, in a gas air heater in which a heat is exchanged with a combustion exhaust gas to preheat the air, if the combustion exhaust gas contains SO X or HCl, it is transmitted. On the heat pipe, low temperature corrosion, ie, sulfuric acid dew point corrosion and hydrochloric acid dew point corrosion, due to dew condensation caused by sulfuric acid dew point and hydrochloric acid dew point, but the above acid dew point can be prevented by using a new S-TEN1 steel pipe (registered trademark) in the heat transfer tube. corrosion.

(先前技術文獻) (previous technical literature) (專利文獻) (Patent Literature)

專利文獻1：日本特開2007-296552號公報 Patent Document 1: Japanese Laid-Open Patent Publication No. 2007-296552

(非專利文獻) (Non-patent literature)

非專利文獻1：“因鍋爐燃燒廢氣產生之高溫腐蝕事例及其對策”2012年8月11日，TECHNO SYSTEMS,Inc.發行，第4章第1節7.氣體空氣加熱管的腐蝕P.281~282 Non-Patent Document 1: "Case of High-Temperature Corrosion Due to Boiler Exhaust Gas and Its Countermeasures", August 11, 2012, issued by TECHNO SYSTEMS, Inc., Chapter 4, Section 1. Corrosion of gas-air heating pipes P.281 ~282

非專利文獻2：“新日鐵技報第380號厚板/鋼管特集”2004年6月發行，18.新S-TEN1鋼管-耐硫酸露點腐蝕鋼S-TEN1更新-P.86~90 Non-Patent Document 2: "Nippon Steel Technical Bulletin No. 380 Thick Plate / Steel Pipe Special" was issued in June 2004, 18. New S-TEN1 Steel Pipe - Sulfuric Acid Dew Point Corrosive Steel S-TEN1 Update - P.86~90

在此，為了更換傳熱管，去除管板與傳熱管之間的焊 接時，會導致損傷管板，因此需要改善。又，為了盡可能不損傷管板而格外注意，所以因勞力和時間引起的工期和費用方面存在問題。 Here, in order to replace the heat transfer tube, the welding between the tube sheet and the heat transfer tube is removed. When it is connected, it will cause damage to the tube sheet and therefore needs to be improved. Moreover, in order to avoid the damage of the tube sheet as much as possible, there are problems in terms of time and cost due to labor and time.

又，將新S-TEN1鋼管用於傳熱管時，由於新S-TEN1鋼管價格高而傳熱管需要複數個，因此期望不使用該種高價的傳熱管而實現長壽命化。 Further, when a new S-TEN1 steel pipe is used for the heat transfer pipe, since the price of the new S-TEN1 steel pipe is high and the heat transfer pipe is required to be plural, it is desirable to achieve long life without using such a high-priced heat transfer pipe.

總之，期望可解決如上述的問題之較佳的腐蝕對策。 In summary, it is desirable to solve the preferred corrosion countermeasures as described above.

本發明係為了解決上述課題而提出者，其目的為提供一種較佳的熱交換器的防腐方法以及熱交換器的防腐構造。 The present invention has been made to solve the above problems, and an object thereof is to provide a preferred method for preventing corrosion of a heat exchanger and a corrosion preventing structure for a heat exchanger.

本發明的一形態之熱交換器的防腐方法為具備與流過比傳熱管固定構件更內側的流路之氣體進行熱交換之傳熱管的熱交換器的防腐方法，其中，採用具備外插或內插於傳熱管之筒狀套管之構成，使傳熱管以及套管的至少一方相對於傳熱管固定構件移動。 An anticorrosion method of a heat exchanger according to one aspect of the present invention is a method of preserving a heat exchanger including a heat transfer tube that exchanges heat with a gas flowing through a flow path inside a heat transfer tube fixing member, wherein The cylindrical sleeve inserted or inserted into the heat transfer tube is configured to move at least one of the heat transfer tube and the sleeve relative to the heat transfer tube fixing member.

依該種熱交換器的防腐方法，若傳熱管以及套管的至少一方腐蝕，則對應該腐蝕使傳熱管以及套管的至少一方相對於傳熱管固定構件移動，因此，例如能夠使腐蝕沿軸線方向移動，不使用高價的傳熱管而能夠以低成本因應腐蝕並實現長壽命化，又，例如能夠在維持將套管固定於傳熱管固定構件的狀態下，使內插於套管並經由該套管固定於傳熱管固定構件之傳熱管沿軸線方向移動並更換，能夠 不損傷傳熱管固定構件而容易地更換已腐蝕之傳熱管。藉此，能夠實現各種較佳的腐蝕對策。 According to the anticorrosion method of the heat exchanger, if at least one of the heat transfer tube and the sleeve is corroded, at least one of the heat transfer tube and the sleeve is moved against the heat transfer tube fixing member in response to corrosion, and therefore, for example, The corrosion moves in the axial direction, and the corrosion can be achieved at a low cost without using an expensive heat transfer tube, and the life can be extended. For example, it can be inserted in a state in which the sleeve is fixed to the heat transfer tube fixing member. The sleeve and the heat transfer tube fixed to the heat transfer tube fixing member via the sleeve are moved and replaced in the axial direction, The corroded heat transfer tube can be easily replaced without damaging the heat transfer tube fixing member. Thereby, various preferred corrosion countermeasures can be achieved.

在此，作為熱交換器的防腐方法可採用以下方法，即採用具備貫穿於傳熱管固定構件並固定於該傳熱管固定構件之套管，以及貫穿於套管內並固定於該套管之傳熱管之構成，對應傳熱管的腐蝕，解除傳熱管與套管的固定，在維持將套管固定於傳熱管固定構件的狀態下，使傳熱管移動並更換之方法。 Here, as the anticorrosion method of the heat exchanger, a method may be employed in which a sleeve having a heat transfer tube fixing member and fixed to the heat transfer tube fixing member is used, and is inserted into the sleeve and fixed to the sleeve The heat transfer tube is configured to remove the heat transfer tube and to fix the heat transfer tube and the sleeve, and to move and replace the heat transfer tube while maintaining the sleeve fixed to the heat transfer tube fixing member.

依該種熱交換器的防腐方法，採用藉由對固定於傳熱管固定構件之套管與傳熱管進行固定，使傳熱管經由套管相對於傳熱管固定構件固定之構成，若傳熱管腐蝕，則對應該腐蝕，解除傳熱管與套管的固定，在維持套管固定於傳熱管固定構件的狀態下，移動並更換傳熱管。因此，不損傷傳熱管固定構件就能夠容易地更換已腐蝕之傳熱管。 According to the anticorrosion method of the heat exchanger, the heat transfer tube is fixed to the heat transfer tube fixing member via a sleeve by fixing the sleeve fixed to the heat transfer tube fixing member and the heat transfer tube. When the heat transfer tube is corroded, it is corroded, the heat transfer tube and the sleeve are fixed, and the heat transfer tube is moved and replaced while the sleeve is fixed to the heat transfer tube fixing member. Therefore, the corroded heat transfer tube can be easily replaced without damaging the heat transfer tube fixing member.

又，作為熱交換器的防腐方法可採用以下方法，即採用具備貫穿於傳熱管固定構件並固定於該傳熱管固定構件之套管，以及貫穿於套管內並固定於該套管之傳熱管之構成，對應傳熱管以及套管的至少一方的腐蝕，解除套管與傳熱管固定構件的固定，或解除傳熱管與套管的固定，使已解除固定之套管或傳熱管沿軸線方向移動，將移動後之套管或傳熱管固定於在固定解除前被固定之對象側構件上之方法。 Moreover, as a method of preserving the heat exchanger, a method may be employed in which a sleeve having a heat transfer tube fixing member and fixed to the heat transfer tube fixing member is inserted, and is inserted into the sleeve and fixed to the sleeve. The heat transfer tube is configured to cancel the fixing of the sleeve and the heat transfer tube fixing member according to the corrosion of at least one of the heat transfer tube and the sleeve, or to fix the heat transfer tube and the sleeve to fix the sleeve or The heat transfer tube is moved in the axial direction, and the moved sleeve or the heat transfer tube is fixed to the object side member fixed before the fixing is released.

依該種熱交換器的防腐方法，採用傳熱管經由套管相對於傳熱管固定構件固定之構成，若傳熱管以及套管的至 少一方腐蝕，則根據該腐蝕，在一方法中，解除套管與傳熱管固定構件的固定，在維持傳熱管固定於套管的狀態下，使傳熱管以及套管沿軸線方向移動，之後使套管固定於傳熱管固定構件。又，在另一方法中，解除傳熱管與套管的固定，在維持套管固定於傳熱管固定構件的狀態下，使傳熱管沿軸線方向移動，之後使傳熱管固定於套管。總之，能夠使腐蝕沿軸線方向移動，並且能夠使未腐蝕的部份向形成有腐蝕之軸線方向位置移動。其結果，不使用高價的傳熱管而能夠以低成本因應腐蝕並實現長壽命化。 According to the anticorrosion method of the heat exchanger, the heat transfer tube is fixed with respect to the heat transfer tube fixing member via the sleeve, and if the heat transfer tube and the sleeve are If there is less corrosion, according to the corrosion, in one method, the fixing of the sleeve and the heat transfer tube fixing member is released, and the heat transfer tube and the sleeve are moved in the axial direction while maintaining the heat transfer tube fixed to the sleeve. Then, the sleeve is fixed to the heat transfer tube fixing member. Further, in another method, the fixing of the heat transfer tube and the sleeve is released, and the heat transfer tube is moved in the axial direction while the sleeve is fixed to the heat transfer tube fixing member, and then the heat transfer tube is fixed to the sleeve. tube. In short, the corrosion can be moved in the axial direction, and the uncorroded portion can be moved to the position in the direction in which the corrosion is formed. As a result, it is possible to achieve corrosion resistance at a low cost without using an expensive heat transfer tube and to achieve a long life.

又，作為熱交換器的防腐方法，可採用在傳熱管的套管側的外周面配置耐腐蝕材之方法。 Moreover, as a method of preserving the heat exchanger, a method of arranging a corrosion-resistant material on the outer peripheral surface of the sleeve side of the heat transfer tube can be employed.

依該種熱交換器的防腐方法，藉由配置於傳熱管的套管側外周面的耐腐蝕材，不使用高價的傳熱管而能夠以低成本防止傳熱管的腐蝕並實現長壽命化。 According to the anticorrosive method of the heat exchanger, the corrosion-resistant material disposed on the outer peripheral surface of the sleeve side of the heat transfer tube can prevent corrosion of the heat transfer tube and achieve long life at low cost without using an expensive heat transfer tube. Chemical.

又，作為熱交換器的防腐方法可採用以下方法，即採用具備貫穿於傳熱管固定構件並固定於該傳熱管固定構件之套管，以及貫穿於套管內並固定於該套管之傳熱管之構成，耐腐蝕材包覆於傳熱管的套管側的外周面，其軸線方向外側的端部位於套管內，並且其軸線方向內側的端部比套管的軸線方向內側的端部更靠軸線方向內側延伸並露出之方法。 Moreover, as a method of preserving the heat exchanger, a method may be employed in which a sleeve having a heat transfer tube fixing member and fixed to the heat transfer tube fixing member is inserted, and is inserted into the sleeve and fixed to the sleeve. The heat transfer tube is configured such that the corrosion-resistant material is coated on the outer peripheral surface of the sleeve side of the heat transfer tube, and the axially outer end portion is located inside the sleeve, and the axially inner end portion is larger than the axial direction of the sleeve. The end portion of the end portion extends further inward in the axial direction and is exposed.

依該種熱交換器的防腐方法，傳熱管經由套管相對於傳熱管固定構件固定，並且在傳熱管的套管側的外周面包覆有耐腐蝕材。該耐腐蝕材的軸線方向內側的端部沿著比 套管的軸線方向內側的端部更靠軸線方向內側延伸並露出，因此，可藉該耐腐蝕材防止傳熱管的腐蝕，並且耐腐蝕材的軸線方向外側的端部位於套管內，所以可無阻礙地固定套管與傳熱管。其結果，不使用高價的傳熱管而能夠以低成本防止傳熱管的腐蝕並實現長壽命化。 According to the anticorrosive method of the heat exchanger, the heat transfer tube is fixed to the heat transfer tube fixing member via the sleeve, and the outer peripheral surface of the sleeve side of the heat transfer tube is coated with the corrosion resistant material. The end portion of the corrosion-resistant material on the inner side in the axial direction The end portion in the axial direction of the sleeve extends further inward in the axial direction and is exposed. Therefore, corrosion resistance of the heat transfer tube can be prevented by the corrosion-resistant material, and the end portion of the corrosion-resistant material in the axial direction is located in the sleeve, so The sleeve and the heat transfer tube can be fixed without hindrance. As a result, corrosion of the heat transfer tube can be prevented at a low cost without using an expensive heat transfer tube, and the life can be extended.

又，作為熱交換器的防腐方法可採用以下方法，即採用具備貫穿於傳熱管固定構件並固定於該傳熱管固定構件之傳熱管，以及貫穿於傳熱管內並被支撐且與氣體進行熱交換之流體流過內部之套管之構成，因應傳熱管的腐蝕，使套管移動之方法。 Moreover, as a method of preserving the heat exchanger, a heat transfer tube having a heat transfer tube fixing member and fixed to the heat transfer tube fixing member, and a heat transfer tube penetrating through the heat transfer tube and supported by the heat transfer tube may be employed. A method in which a gas for heat exchange of a gas flows through an inner sleeve, and the sleeve is moved in response to corrosion of the heat transfer tube.

依該種熱交換器的防腐方法，採用套管經由傳熱管相對於傳熱管固定構件卡合之構成，若傳熱管腐蝕，則對應該腐蝕，在維持傳熱管固定於傳熱管固定構件的狀態下，使傳熱管內的套管沿軸線方向移動，在一方法中，能夠使成為流過套管內之流體的出口之套管出口的位置相對於傳熱管沿著軸線方向移動，且能夠使產生於套管出口附近並導致傳熱管的腐蝕之低溫區域沿軸線方向移動。又，在另一方法中，藉由套管沿軸線方向移動並更換為另一例如長度不同之套管，能夠使導致傳熱管的腐蝕之套管出口的位置相對於更換前的套管出口的位置沿著軸線方向移動。總之，能夠使套管出口的位置沿著軸線方向移動，能夠沿軸線方向改變所導致之傳熱管的腐蝕位置。其結果，不使用高價的傳熱管而能夠以低成本應對腐蝕並實現長壽命化。 According to the anticorrosion method of the heat exchanger, the sleeve is configured to be engaged with the heat transfer tube fixing member via the heat transfer tube, and if the heat transfer tube is corroded, it is corroded, and the heat transfer tube is fixed to the heat transfer tube. In the state of the fixing member, the sleeve in the heat transfer tube is moved in the axial direction. In one method, the position of the sleeve outlet which is the outlet of the fluid flowing through the sleeve can be made along the axis of the heat transfer tube. The direction is moved, and the low temperature region generated near the outlet of the sleeve and causing corrosion of the heat transfer tube can be moved in the axial direction. Further, in another method, by moving the sleeve in the axial direction and replacing it with another sleeve of different lengths, for example, the position of the sleeve outlet causing corrosion of the heat transfer tube can be made relative to the sleeve outlet before replacement. The position moves along the axis. In summary, the position of the sleeve outlet can be moved in the axial direction, and the corrosion position of the heat transfer tube caused by the axial direction can be changed. As a result, it is possible to cope with corrosion at a low cost without using an expensive heat transfer tube and to achieve a long life.

在此，在傳熱管的套管側的外周面配置耐腐蝕材即 可。依此，藉由配置於傳熱管的套管側的外周面之耐腐蝕材，不使用高價的傳熱管而能夠以低成本防止傳熱管的腐蝕並實現長壽命化。 Here, the corrosion-resistant material is disposed on the outer peripheral surface of the sleeve side of the heat transfer tube. can. According to this, the corrosion-resistant material disposed on the outer peripheral surface of the sleeve side of the heat transfer tube can prevent corrosion of the heat transfer tube at a low cost without using an expensive heat transfer tube, thereby achieving a long life.

本發明的一形態之熱交換器的防腐構造，具備傳熱管固定構件；與流過比該傳熱管固定構件更內側的流路之氣體進行熱交換之傳熱管；以及外插或內插於傳熱管之筒狀套管，並以能夠使傳熱管以及套管的至少一方相對於傳熱管固定構件移動地支撐。 The anticorrosive structure of the heat exchanger according to the aspect of the present invention includes a heat transfer tube fixing member, a heat transfer tube that exchanges heat with a gas flowing through a flow path inside the heat transfer tube fixing member, and an external or internal heat exchange tube The cylindrical sleeve inserted into the heat transfer tube is supported so that at least one of the heat transfer tube and the sleeve can be moved relative to the heat transfer tube fixing member.

依該種熱交換器的防腐構造，能夠發揮與上述熱交換器的防腐方法相同的作用和效果。 According to the anticorrosive structure of the heat exchanger, the same action and effect as the anticorrosion method of the heat exchanger described above can be exhibited.

依本發明，可提供一種能夠實現較佳的腐蝕對策之熱交換器的防腐方法以及熱交換器的防腐構造。 According to the present invention, it is possible to provide an anticorrosive method of a heat exchanger capable of achieving a preferable corrosion countermeasure and an anticorrosive structure of the heat exchanger.

7‧‧‧管板(傳熱管固定構件) 7‧‧‧ tube plate (heat transfer tube fixing member)

8、18‧‧‧傳熱管 8, 18‧‧‧ heat transfer tube

9、19‧‧‧套管 9, 19‧‧ ‧ casing

10、20‧‧‧第1焊接部 10, 20‧‧‧1st welding department

11、21‧‧‧第2焊接部 11, 21‧‧‧ second welding department

12‧‧‧耐腐蝕材料 12‧‧‧Corrosion resistant materials

200、300、400‧‧‧熱交換器的防腐結構 200, 300, 400‧‧‧ anti-corrosion structure of heat exchanger

C‧‧‧腐蝕 C‧‧‧Corrosion

第1圖係運用本發明的熱交換器的防腐方法之循環流化床鍋爐之概略構成圖。 Fig. 1 is a schematic view showing the configuration of a circulating fluidized bed boiler using the anticorrosion method of the heat exchanger of the present invention.

第2圖係表示運用本發明第1實施形態之熱交換器的防腐方法之傳熱管的固定構造之縱剖面圖。 Fig. 2 is a vertical cross-sectional view showing a fixing structure of a heat transfer tube to which an anticorrosive method of a heat exchanger according to a first embodiment of the present invention is applied.

第3圖係表示本發明第1實施形態之熱交換器的防腐方法的順序之說明圖。 Fig. 3 is an explanatory view showing the procedure of the anticorrosion method of the heat exchanger according to the first embodiment of the present invention.

第4圖係接著第3圖之說明圖。 Fig. 4 is an explanatory view subsequent to Fig. 3.

第5圖係表示本發明第2實施形態之熱交換器的防腐 方法的順序之說明圖。 Figure 5 is a view showing the corrosion protection of the heat exchanger according to the second embodiment of the present invention. An illustration of the order of the methods.

第6圖係接著第5圖之說明圖。 Fig. 6 is an explanatory view subsequent to Fig. 5.

第7圖係接著第6圖之說明圖。 Fig. 7 is an explanatory view subsequent to Fig. 6.

第8圖係表示運用本發明第3實施形態之熱交換器的防腐方法之傳熱管的固定構造之縱剖面圖。 Fig. 8 is a vertical cross-sectional view showing a fixing structure of a heat transfer tube to which an anticorrosive method of a heat exchanger according to a third embodiment of the present invention is applied.

第9圖係表示運用本發明第4實施形態之熱交換器的防腐方法之傳熱管的固定構造之縱剖面圖。 Fig. 9 is a vertical cross-sectional view showing a fixing structure of a heat transfer tube to which an anticorrosive method of a heat exchanger according to a fourth embodiment of the present invention is applied.

以下，參閱第1圖至第9圖對本發明之熱交換器的防腐方法的較佳實施形態進行說明。第1圖至第4圖係表示本發明的第1實施形態，第5圖至第7圖係表示本發明的第2實施形態，第8圖係表示本發明的第3實施形態，第9圖係表示本發明的第4實施形態，各圖中，對相同元件賦予相同的符號，並省略重複之說明。 Hereinafter, preferred embodiments of the anticorrosive method of the heat exchanger of the present invention will be described with reference to Figs. 1 to 9 . 1 to 4 show a first embodiment of the present invention, and Figs. 5 to 7 show a second embodiment of the present invention, and Fig. 8 shows a third embodiment of the present invention, and Fig. 9 In the fourth embodiment of the present invention, the same components are denoted by the same reference numerals, and the description thereof will not be repeated.

首先，對第1圖至第4圖所示之第1實施形態進行說明。第1圖係運用本發明的熱交換器的防腐方法之循環流化床鍋爐之概略構成圖，第2圖係表示運用本發明的第1實施形態之熱交換器的防腐方法之傳熱管的固定構造之縱剖面圖，第3圖係表示本發明的第1實施形態之熱交換器的防腐方法的順序之說明圖，第4圖係接著第3圖之說明圖。 First, the first embodiment shown in Figs. 1 to 4 will be described. 1 is a schematic configuration diagram of a circulating fluidized bed boiler to which an anticorrosion method of a heat exchanger according to the present invention is applied, and FIG. 2 is a view showing a heat transfer tube to which an anticorrosive method of a heat exchanger according to a first embodiment of the present invention is applied. FIG. 3 is an explanatory view showing a procedure of a method for preventing corrosion of a heat exchanger according to a first embodiment of the present invention, and FIG. 4 is an explanatory view subsequent to FIG.

如第1圖所示，循環流化床鍋爐100大致具備成為燃燒爐之火爐1，從該火爐1生成之燃燒廢氣分離固體顆粒 之旋風器2，以及與來自旋風器2的燃燒廢氣進行熱交換並回收廢熱之熱交換部3。 As shown in Fig. 1, the circulating fluidized bed boiler 100 is roughly provided with a furnace 1 which is a combustion furnace, and solid waste particles are separated from the combustion exhaust gas generated from the furnace 1. The cyclone 2 and the heat exchange unit 3 that exchanges heat with the combustion exhaust gas from the cyclone 2 and recovers waste heat.

火爐1係如下，亦即爐壁內成為燃燒室，在該燃燒室內收容例如矽砂等的流動材，並且導入成為燃燒對象之例如生物量或煤炭等燃料，或導入廢輪胎、垃圾等焚燒目的之廢棄物等原料，藉由後述燃燒用空氣一邊使該等流動一邊形成流化床並燃燒原料。 The furnace 1 is a combustion chamber in which the inside of the furnace wall is a combustion chamber, and a fluid material such as ceramsite is contained in the combustion chamber, and a fuel such as biomass or coal to be burned is introduced, or waste tires, garbage, and the like are introduced for incineration. The raw materials such as waste are formed into a fluidized bed while burning the air by the combustion air described later, and the raw materials are burned.

旋風器2係將來自火爐1之燃燒廢氣中所伴隨之流動材、燃燒灰、未燃燒灰等固體顆粒分離並使其返回到火爐1內的流化床。 The cyclone 2 separates and returns the solid particles such as the flowing material, the combustion ash, and the unburned ash accompanying the combustion exhaust gas from the furnace 1 to the fluidized bed in the furnace 1.

熱交換部3在比旋風器2更下游側的燃燒廢氣的流路中，自上游側向下游側依序具備過熱器4、省煤器5以及空氣預熱器6。 The heat exchange unit 3 is provided with a superheater 4, an economizer 5, and an air preheater 6 in order from the upstream side to the downstream side in the flow path of the combustion exhaust gas on the downstream side of the cyclone 2.

省煤器5係藉由將燃燒廢氣的熱量經由傳熱管傳熱至鍋爐供水來對鍋爐供水進行預熱。被該省煤器5預熱之鍋爐供水在蒸氣鼓中成為蒸氣，將該蒸氣供給到過熱器4。 The economizer 5 preheats the boiler water supply by transferring heat of the combustion exhaust gas to the boiler water supply via the heat transfer tube. The boiler water supplied by the economizer 5 is steamed in the steam drum, and the steam is supplied to the superheater 4.

過熱器4係藉由將燃燒廢氣的熱量經由傳熱管傳熱到來自蒸氣鼓的蒸氣使其成為過熱蒸氣。被該過熱器4過熱之過熱蒸氣用於發電渦輪等中。 The superheater 4 transfers heat of the combustion exhaust gas to the steam from the steam drum through the heat transfer tube to become superheated steam. The superheated steam superheated by the superheater 4 is used in a power generation turbine or the like.

空氣預熱器6係藉由將燃燒廢氣的熱量經由傳熱管傳熱至空氣來對空氣進行預熱。被該空氣預熱器6預熱之空氣作為燃燒用空氣供給到火爐1中。 The air preheater 6 preheats the air by transferring heat of the combustion exhaust gas to the air via the heat transfer tubes. The air preheated by the air preheater 6 is supplied to the furnace 1 as combustion air.

如第2圖所示，該空氣預熱器6中，燃燒廢氣的流路形成於相對向配置之平板狀管板(傳熱管固定構件)7、7 彼此間，傳熱管8是以和流過比管板7更內側(圖示左側)的流路之燃燒廢氣的流動(圖示上下方向)正交地配置複數個。另外，圖中僅顯示空氣入口側的1片管板7，以及僅1根傳熱管8。 As shown in Fig. 2, in the air preheater 6, the flow path of the combustion exhaust gas is formed in the oppositely disposed flat tube sheets (heat transfer tube fixing members) 7, 7 The heat transfer tubes 8 are arranged in a plurality of orthogonal to the flow of the combustion exhaust gas (the vertical direction in the drawing) flowing through the flow path on the inner side (the left side in the drawing) of the tube sheet 7 . In addition, only one tube sheet 7 on the air inlet side and only one heat transfer tube 8 are shown in the drawing.

在此，本實施形態中，傳熱管8經由筒狀套管9固定於管板7。具體而言，套管9貫穿於管板7並藉由與該管板7焊接而固定，傳熱管8貫穿於套管9內並藉由與該套管9焊接而固定。 Here, in the present embodiment, the heat transfer tube 8 is fixed to the tube sheet 7 via the tubular sleeve 9. Specifically, the sleeve 9 is inserted through the tube sheet 7 and fixed by welding to the tube sheet 7, and the heat transfer tube 8 is inserted into the sleeve 9 and fixed by welding to the sleeve 9.

更具體而言，套管9的外周面與管板7的外側(圖示右側)的端面例如經由角焊形成之第1焊接部10接合，傳熱管8的外周面與被外插之套管9的外側的端面例如經由角焊形成之第2焊接部11接合。另外，管板7與套管9的接合，以及套管9與傳熱管8的接合可不以焊接，而是以壓接、機械安裝等。又，傳熱管8、套管9以及管板7雖由鋼構成，但即使是S-TEN1(登錄商標)、SUS等材質也遲早會腐蝕，因此亦可使用S-TEN1(登錄商標)、SUS等材質。 More specifically, the outer peripheral surface of the sleeve 9 is joined to the outer surface (the right side of the drawing) of the tube sheet 7 by, for example, the first welded portion 10 formed by fillet welding, and the outer peripheral surface of the heat transfer tube 8 and the outer sleeve are inserted. The outer end surface of the tube 9 is joined by, for example, the second welded portion 11 formed by fillet welding. Further, the engagement of the tube sheet 7 with the sleeve 9, and the engagement of the sleeve 9 with the heat transfer tube 8 may not be welded, but may be crimped, mechanically mounted, or the like. In addition, although the heat transfer tube 8, the sleeve 9, and the tube sheet 7 are made of steel, even if the materials such as S-TEN1 (registered trademark) and SUS are corroded sooner or later, S-TEN1 (registered trademark) can be used. SUS and other materials.

在此，作為裝配順序，可以使套管9貫穿管板7並焊接管板7與套管9，之後，使傳熱管8貫穿於固定在管板7之套管9並焊接套管9與傳熱管8之順序，亦可以使傳熱管8貫穿套管9並焊接套管9與傳熱管8，之後，使固定著傳熱管8之套管9貫穿管板7並焊接套管9與管板7之順序。 Here, as an assembly sequence, the sleeve 9 can be passed through the tube sheet 7 and the tube sheet 7 and the sleeve 9 can be welded. Thereafter, the heat transfer tube 8 is inserted through the sleeve 9 fixed to the tube sheet 7 and welded to the sleeve 9 and The order of the heat transfer tubes 8 can also make the heat transfer tubes 8 pass through the sleeve 9 and weld the sleeve 9 and the heat transfer tubes 8, after which the sleeve 9 holding the heat transfer tubes 8 is inserted through the tube sheets 7 and welded to the sleeves. 9 and the order of the tube sheet 7.

而且，管板7與套管9的固定，以及套管9與傳熱管 8的固定藉由焊接進行，所以可確實封閉比管板7更內側的流路確保氣密性。另外，在此，焊接部10、11雖是藉角焊形成，但當然亦可藉由坡口焊形成。 Moreover, the tube plate 7 is fixed to the sleeve 9, and the sleeve 9 and the heat transfer tube Since the fixing of 8 is performed by welding, it is possible to surely close the flow path inside the tube sheet 7 to ensure airtightness. Here, although the welded portions 10 and 11 are formed by fillet welding, of course, they may be formed by groove welding.

依具有該種構成之循環流化床鍋爐100，從火爐1排出且固定顆粒藉由旋風器2被固體-氣體分離之燃燒廢氣藉由通過過熱器4、省煤器5以及空氣預熱器6來與各自的傳熱管進行熱交換並回收廢熱。 According to the circulating fluidized bed boiler 100 having such a configuration, the combustion exhaust gas discharged from the furnace 1 and fixed by the cyclone 2 by the solid-gas separation is passed through the superheater 4, the economizer 5, and the air preheater 6 To exchange heat with the respective heat transfer tubes and recover waste heat.

在此，空氣預熱器6位於燃燒廢氣流過之流路的最下游側，燃燒廢氣的廢熱被比空氣預熱器6更上游側的過熱器4、省煤器5回收，因此與空氣預熱器6進行熱交換之燃燒廢氣的溫度變低。尤其，空氣預熱器6的傳熱管8的空氣入口側(管板7附近)的溫度變低，若傳熱管8和套管9的表面成為約120~140℃以下，則易產生硫酸露點腐蝕，而若成為60~80℃以下，則易產生鹽酸露點腐蝕。 Here, the air preheater 6 is located on the most downstream side of the flow path through which the combustion exhaust gas flows, and the waste heat of the combustion exhaust gas is recovered by the superheater 4 and the economizer 5 on the upstream side of the air preheater 6, and thus the air preheating The temperature of the combustion exhaust gas in which the heat exchanger 6 performs heat exchange becomes low. In particular, the temperature of the air inlet side (near the tube sheet 7) of the heat transfer tube 8 of the air preheater 6 becomes low, and if the surfaces of the heat transfer tubes 8 and the sleeve 9 become about 120 to 140 ° C or lower, sulfuric acid is easily generated. Dew point corrosion, if it is below 60 ~ 80 ° C, it is easy to produce hydrochloric acid dew point corrosion.

而且，如第2圖所示，傳熱管8上產生酸露點腐蝕C時，在本實施形態中，根據腐蝕C的程度(在開孔之前)更換傳熱管8。另外，第2圖中雖表示腐蝕C產生於傳熱管8的外周側之例子，但亦有在內周側產生腐蝕C的情況。在第3圖之後的圖中亦相同。又，關於後述的第5圖等，雖也表示腐蝕C產生於套管9的外周側之例子，但亦有在內周側產生腐蝕C的情況。 Further, as shown in Fig. 2, when acid dew corrosion C is generated in the heat transfer tube 8, in the present embodiment, the heat transfer tube 8 is replaced in accordance with the degree of corrosion C (before opening). In addition, although the case where the corrosion C is generated on the outer peripheral side of the heat transfer tube 8 is shown in FIG. 2, there is a case where the corrosion C is generated on the inner peripheral side. The same is true in the figure after the third figure. In addition, although the case where the corrosion C is generated on the outer peripheral side of the sleeve 9 is shown in the fifth figure and the like which will be described later, there is a case where the corrosion C is generated on the inner peripheral side.

具體而言，將接合套管9與傳熱管8之第2焊接部11例如藉研磨機等如第3圖所示地去除，在維持將套管9 固定於管板7的狀態下，沿圖示箭頭方向移動並拔出傳熱管8，接著，如第4圖所示，更換為新傳熱管18。經由例如由角焊形成之第2焊接部21接合傳熱管18的外周面與套管9的外側的端面。 Specifically, the second welded portion 11 of the joint sleeve 9 and the heat transfer tube 8 is removed by, for example, a grinding machine or the like as shown in Fig. 3, and the sleeve 9 is maintained. In the state of being fixed to the tube sheet 7, the heat transfer tube 8 is moved in the direction of the arrow shown in the figure, and then, as shown in Fig. 4, the new heat transfer tube 18 is replaced. The outer peripheral surface of the heat transfer tube 18 and the outer end surface of the sleeve 9 are joined via the second welded portion 21 formed by, for example, fillet welding.

另外，在此，雖以肉眼識別傳熱管8的腐蝕C，並根據該腐蝕C的程度更換傳熱管8，但例如亦可利用感測器和照像機等自動識別腐蝕C的程度，並藉由電腦自動決定更換時期。 Here, although the corrosion C of the heat transfer tube 8 is visually recognized, and the heat transfer tube 8 is replaced according to the degree of the corrosion C, for example, the degree of corrosion C can be automatically recognized by a sensor, a camera, or the like. And the computer automatically determines the replacement period.

如上述，依本實施形態的防腐方法，採用具備貫穿管板7並固定於該管板7之筒狀套管9，以及貫穿套管9內並固定於該套管9之傳熱管8之構成，若傳熱管8腐蝕，則對應該腐蝕C，解除傳熱管8與套管9的固定，在維持將套管9固定於管板7的狀態下，使傳熱管8移動並更換，因此不損傷管板7就能夠容易地更換已腐蝕之傳熱管8。 As described above, according to the anticorrosion method of the present embodiment, the tubular sleeve 9 having the through-tube sheet 7 and fixed to the tube sheet 7 and the heat transfer tube 8 penetrating the sleeve 9 and fixed to the sleeve 9 are used. In the configuration, if the heat transfer tube 8 is corroded, the C is corroded, the heat transfer tube 8 and the sleeve 9 are released, and the heat transfer tube 8 is moved and replaced while the sleeve 9 is fixed to the tube sheet 7. Therefore, the corroded heat transfer tube 8 can be easily replaced without damaging the tube sheet 7.

另外，因傳熱管的反覆更換而使套管9的外側的端部變形時，切除該套管9的外側的端部而繼續使用即可。 Further, when the outer end portion of the sleeve 9 is deformed by the reverse replacement of the heat transfer tube, the outer end portion of the sleeve 9 may be cut and used.

第5圖係表示本發明的第2實施形態之防腐方法的順序之說明圖，第6圖係接著第5圖之說明圖，第7圖係接著第6圖之說明圖。 Fig. 5 is an explanatory view showing the procedure of the anticorrosion method according to the second embodiment of the present invention, and Fig. 6 is an explanatory view subsequent to Fig. 5, and Fig. 7 is an explanatory view subsequent to Fig. 6.

運用該第2實施形態之防腐方法之傳熱管的固定構造與第1實施形態的第2圖所示者相同。 The fixing structure of the heat transfer tube using the anticorrosion method of the second embodiment is the same as that shown in Fig. 2 of the first embodiment.

而且，該第2實施形態中，在套管9或傳熱管8產生酸露點腐蝕C時(第5圖中在套管9上產生腐蝕C)，對 應腐蝕C的程度(例如在傳熱管8開孔之前)沿著軸線方向移動傳熱管8以及套管9。 Further, in the second embodiment, when the acid dew point C is generated in the sleeve 9 or the heat transfer tube 8, (corrosion C is generated in the sleeve 9 in Fig. 5), The heat transfer tube 8 and the sleeve 9 are moved in the axial direction to the extent that the C is to be etched (for example, before the heat transfer tube 8 is opened).

具體而言，將接合有管板7與套管9之第1焊接部10(參閱第2圖)例如藉研磨機等如第5圖所示地去除，在維持將傳熱管8固定於套管9的狀態下，如第6圖中箭頭所示，使傳熱管8以及套管9沿軸線方向移動。在此，使傳熱管8以及套管9向內側(圖示左側)移動。 Specifically, the first welded portion 10 (see FIG. 2) to which the tube sheet 7 and the sleeve 9 are joined is removed by, for example, a polishing machine as shown in FIG. 5, and the heat transfer tube 8 is fixed to the sleeve. In the state of the tube 9, as shown by the arrow in Fig. 6, the heat transfer tube 8 and the sleeve 9 are moved in the axial direction. Here, the heat transfer tube 8 and the sleeve 9 are moved inward (left side in the drawing).

而且，移動傳熱管8以及套管9之後，則如第7圖所示，例如經由角焊形成之第1焊接部20接合套管9的外周面與管板7的外側(圖示右側)的端面。 Further, after the heat transfer tube 8 and the sleeve 9 are moved, as shown in Fig. 7, for example, the first welded portion 20 formed by fillet welding joins the outer peripheral surface of the sleeve 9 and the outer side of the tube sheet 7 (right side in the drawing) End face.

另外，在此，以肉眼識別腐蝕C，並對應該腐蝕C的程度，使傳熱管8以及套管9沿軸線方向移動，但例如亦可利用感測器和照像機等自動識別腐蝕C的程度，並藉由電腦自動決定移動時期。 Further, here, the corrosion C is visually recognized, and the heat transfer tube 8 and the sleeve 9 are moved in the axial direction to the extent that the C should be corroded. However, for example, the corrosion can be automatically recognized by a sensor, a camera, or the like. The extent of the mobile period is automatically determined by the computer.

又，套管9以及傳熱管8的移動可以在套管9產生酸露點腐蝕C之情況，在傳熱管8產生酸露點腐蝕C之情況，或在套管9以及傳熱管8的雙方產生酸露點腐蝕C之情況下實施，亦即，只要在傳熱管8以及套管9的至少一方產生酸露點腐蝕C之情況下實施即可。 Further, the movement of the sleeve 9 and the heat transfer tube 8 may be such that acid dew corrosion C is generated in the sleeve 9, acid dew corrosion C is generated in the heat transfer tube 8, or both the sleeve 9 and the heat transfer tube 8 are present. When acid dew corrosion C is generated, it may be carried out in the case where at least one of the heat transfer tube 8 and the sleeve 9 generates acid dew point corrosion C.

如上述，依第2實施形態的防腐方法，採用具備貫穿管板7並固定於該管板7之筒狀套管9，以及貫穿套管9內並固定於該套管9之傳熱管8之構成，若傳熱管8以及套管9的至少一方腐蝕，則對應該腐蝕C，解除套管9與管板7的固定，在維持將傳熱管8固定於套管9的狀態 下，使傳熱管8以及套管9沿著軸線方向移動，之後，將套管9固定於管板7，因此能夠沿軸線方向移動腐蝕C，並且能夠使未腐蝕的部份向形成有腐蝕C之軸線方向位置移動。其結果，不使用高價的傳熱管而能夠以低成本因應腐蝕並實現長壽命化。 As described above, according to the anticorrosion method of the second embodiment, the cylindrical sleeve 9 having the through-tube sheet 7 and fixed to the tube sheet 7 and the heat transfer tube 8 penetrating the sleeve 9 and fixed to the sleeve 9 are used. In the configuration, when at least one of the heat transfer tube 8 and the sleeve 9 is corroded, the C is corroded, the fixing of the sleeve 9 and the tube sheet 7 is released, and the state in which the heat transfer tube 8 is fixed to the sleeve 9 is maintained. Next, the heat transfer tube 8 and the sleeve 9 are moved in the axial direction, and then the sleeve 9 is fixed to the tube sheet 7, so that the corrosion C can be moved in the axial direction, and the uncorroded portion can be formed to be corroded. The position of the axis of C moves. As a result, it is possible to achieve corrosion resistance at a low cost without using an expensive heat transfer tube and to achieve a long life.

另外，如第5圖所示，當套管9腐蝕時，由於可爭取腐蝕C到達傳熱管8為止的時間，因此能夠進一步提高壽命。 Further, as shown in Fig. 5, when the sleeve 9 is corroded, since the time until the corrosion C reaches the heat transfer tube 8 can be obtained, the life can be further improved.

又，套管9未腐蝕而只有傳熱管8腐蝕時，作為與上述一方法不同之另一方法，解除傳熱管8與套管9的固定，在維持將套管9固定於管板7的狀態下，使傳熱管8沿軸線方向移動，之後，將傳熱管8固定於套管9即可。該情況下，亦能夠使腐蝕C沿軸線方向移動，並且能夠使未腐蝕的部份向形成有腐蝕C之軸線方向位置移動。其結果，不使用高價的傳熱管而能夠以低成本因應腐蝕並實現長壽命化。 Further, when the sleeve 9 is not corroded and only the heat transfer tube 8 is corroded, as another method different from the above method, the fixing of the heat transfer tube 8 and the sleeve 9 is released, and the sleeve 9 is fixed to the tube sheet 7 while maintaining. In the state of the heat transfer tube 8, the heat transfer tube 8 is moved in the axial direction, and then the heat transfer tube 8 is fixed to the sleeve 9. In this case as well, the corrosion C can be moved in the axial direction, and the uncorroded portion can be moved to the position in the direction in which the corrosion C is formed. As a result, it is possible to achieve corrosion resistance at a low cost without using an expensive heat transfer tube and to achieve a long life.

如以上，第2圖所示之固定構造發揮熱交換器的防腐構造200的功能。防腐構造200中具備作為傳熱管固定構件的管板7，與流過比該管板7更內側的流路之氣體進行熱交換之傳熱管8，以及外插於傳熱管8之筒狀套管9，並支撐傳熱管8以及套管9的至少一方可相對於管板7移動。熱交換器的防腐結構200，藉由管板7支撐套管9以及傳熱管8。如第3圖所示，傳熱管8藉由去除傳熱管8與套管9之間的第2焊接部11能夠相對於管板7(以及 套管9)移動。另外，在能夠以去除的第2焊接部11暫時限制傳熱管8移動之狀態係藉由去除第2焊接部11而容許傳熱管8移動之狀態，因此相當於支撐傳熱管8能夠相對於管板7移動之狀態。如第5圖所示，傳熱管8以及套管9藉由去除管板7與套管9之間的第1焊接部10能夠相對於管板7移動。另外，在以能夠去除的第1焊接部10暫時限制傳熱管8以及套管9的移動之狀態係藉由去除第1焊接部10而容許傳熱管8以及套管9移動之狀態，因此相當於支撐傳熱管8以及套管9能夠相對於管板7移動之狀態。 As described above, the fixed structure shown in FIG. 2 functions as the anticorrosion structure 200 of the heat exchanger. The anti-corrosion structure 200 includes a tube sheet 7 as a heat transfer tube fixing member, a heat transfer tube 8 that exchanges heat with a gas flowing through a flow path inside the tube sheet 7, and a tube that is externally inserted into the heat transfer tube 8 The sleeve 9 and at least one of the support heat transfer tubes 8 and the sleeve 9 are movable relative to the tube sheet 7. The anticorrosive structure 200 of the heat exchanger supports the sleeve 9 and the heat transfer tube 8 by the tube sheet 7. As shown in FIG. 3, the heat transfer tube 8 can be opposed to the tube sheet 7 by removing the second welded portion 11 between the heat transfer tube 8 and the sleeve 9. The sleeve 9) moves. In addition, in a state where the second welded portion 11 can be temporarily removed, the heat transfer tube 8 can be temporarily moved, and the second welded portion 11 is removed to allow the heat transfer tube 8 to move. Therefore, the support heat transfer tube 8 can be relatively The state in which the tube sheet 7 is moved. As shown in Fig. 5, the heat transfer tube 8 and the sleeve 9 are movable relative to the tube sheet 7 by removing the first welded portion 10 between the tube sheet 7 and the sleeve 9. In addition, in a state where the movement of the heat transfer tube 8 and the sleeve 9 is temporarily restricted by the first welded portion 10 that can be removed, the heat transfer tube 8 and the sleeve 9 are allowed to move by removing the first welded portion 10, so that the heat transfer tube 8 and the sleeve 9 are allowed to move. This corresponds to a state in which the heat transfer tube 8 and the sleeve 9 can be moved relative to the tube sheet 7.

第8圖係表示運用本發明的第3實施形態之防腐方法之傳熱管的固定構造之縱剖面圖。 Fig. 8 is a longitudinal sectional view showing a fixing structure of a heat transfer tube to which the anticorrosion method according to the third embodiment of the present invention is applied.

該第3實施形態的傳熱管的固定構造與第2圖所示之第1、第2實施形態的傳熱管的固定構造不同之點係在傳熱管8的套管9側的外周面配置耐腐蝕材12之點。另外，如第8圖所示之固定構造發揮防腐構造300的功能，該防腐構造發揮與第2圖所示之熱交換器的防腐構造200相同主旨的作用和效果。 The fixing structure of the heat transfer tube according to the third embodiment is different from the fixing structure of the heat transfer tube according to the first and second embodiments shown in Fig. 2 on the outer peripheral surface of the heat transfer tube 8 on the side of the sleeve 9 The point of the corrosion-resistant material 12 is configured. Further, the fixed structure shown in Fig. 8 functions as the anticorrosive structure 300, and the anticorrosive structure exhibits the same functions and effects as those of the anticorrosion structure 200 of the heat exchanger shown in Fig. 2 .

具體而言，耐腐蝕材12設置為包覆於傳熱管8的套管9側的外周面，並進入到套管9的內周面之間的間隙13中。該耐腐蝕材12中，其軸線方向外側的端部位於套管9內，並且其軸線方向內側的端部以沿比套管9的軸線方向內側的端部更靠軸線方向內側延伸並露出地包覆於傳熱管8。 Specifically, the corrosion-resistant material 12 is provided so as to cover the outer peripheral surface of the heat transfer tube 8 on the side of the sleeve 9 and enter the gap 13 between the inner peripheral faces of the sleeve 9. In the corrosion-resistant material 12, the end portion on the outer side in the axial direction is located in the sleeve 9, and the end portion on the inner side in the axial direction extends inward in the axial direction along the end portion on the inner side in the axial direction of the sleeve 9, and is exposed. Covered by the heat transfer tube 8.

在此，耐腐蝕材12係施加於傳熱管8的外周面之耐腐蝕性之塗層，具體而言，可舉出基於噴鍍、塗裝、鍍覆等者。又，例如將耐腐蝕材即玻璃管***傳熱管8與套管9之間的間隙13中，並將玻璃管包覆於傳熱管8之構成亦可。另外，耐腐蝕材12除耐腐蝕性之外還具有耐磨損性則更佳。 Here, the corrosion-resistant material 12 is a coating for corrosion resistance applied to the outer peripheral surface of the heat transfer tube 8, and specific examples thereof include sputtering, coating, plating, and the like. Further, for example, a glass tube which is a corrosion-resistant material may be inserted into the gap 13 between the heat transfer tube 8 and the sleeve 9, and the glass tube may be coated on the heat transfer tube 8. Further, the corrosion-resistant material 12 is more excellent in abrasion resistance in addition to corrosion resistance.

在此，作為裝配順序，可以使套管9貫穿管板7並焊接管板7與套管9，之後，使包覆有耐腐蝕材12之傳熱管8貫穿固定在管板7之套管9，並焊接套管9與傳熱管8之順序，亦可以使包覆有耐腐蝕材12之傳熱管8貫穿套管9並焊接套管9與傳熱管8，之後，使固定傳熱管8之套管9貫穿管板7並焊接套管9與管板7之順序。 Here, as an assembly sequence, the sleeve 9 can be passed through the tube sheet 7 and the tube sheet 7 and the sleeve 9 can be welded. Thereafter, the heat transfer tube 8 coated with the corrosion-resistant material 12 is inserted through the sleeve of the tube sheet 7. 9. The order of welding the sleeve 9 and the heat transfer tube 8 may also allow the heat transfer tube 8 coated with the corrosion-resistant material 12 to pass through the sleeve 9 and weld the sleeve 9 and the heat transfer tube 8, and then fix the transmission. The casing 9 of the heat pipe 8 penetrates the tube sheet 7 and the order of the sleeve 9 and the tube sheet 7 is welded.

而且，該第3實施形態中，針對具有上述耐腐蝕材12之傳熱管8，可運用前述之第1、第2實施形態的防腐方法。 Further, in the third embodiment, the anticorrosion method of the first and second embodiments described above can be applied to the heat transfer tube 8 having the corrosion-resistant material 12.

因此，依第3實施形態，除第1、第2實施形態的作用、效果之外，還可以藉配置於傳熱管8的套管9側的外周面之耐腐蝕材12，不使用高價的傳熱管而能夠以低成本防止傳熱管8的腐蝕並實現長壽命化。 Therefore, according to the third embodiment, in addition to the actions and effects of the first and second embodiments, the corrosion-resistant material 12 disposed on the outer peripheral surface of the heat transfer tube 8 on the side of the sleeve 9 can be used without expensive. The heat transfer tube can prevent corrosion of the heat transfer tube 8 at a low cost and achieve a long life.

又，依該第3實施形態，採用具備貫穿管板7並固定於該管板7之套管9，以及貫穿套管9內並固定於該套管9之傳熱管8之構成，在傳熱管8的套管9側的外周面包覆耐腐蝕材12，使該耐腐蝕材12的軸線方向內側的端部比套管9的軸線方向內側的端部更靠軸線方向內側延伸並 露出，因此藉由該耐腐蝕材12能夠防止傳熱管8的腐蝕，並且使耐腐蝕材12的軸線方向外側的端部位於套管9內，因此能夠藉由第2焊接部11無阻礙地焊接套管9的軸線方向外側的端部與傳熱管8的外周面。並非焊接時，可無阻礙地固定套管9與傳熱管8。亦即，除第1、第2實施形態的作用、效果之外，還可藉由耐腐蝕材12，不使用高價的傳熱管而能夠以低成本防止傳熱管8的腐蝕並實現長壽命化。 Further, according to the third embodiment, the sleeve 9 having the through-tube sheet 7 and fixed to the tube sheet 7 and the heat transfer tube 8 penetrating the sleeve 9 and fixed to the sleeve 9 are used. The outer peripheral surface of the heat pipe 8 on the side of the sleeve 9 is covered with the corrosion-resistant material 12, and the end portion of the corrosion-resistant material 12 on the inner side in the axial direction extends inward in the axial direction from the end portion on the inner side in the axial direction of the sleeve 9. Since the corrosion-resistant material 12 can prevent corrosion of the heat transfer tube 8 and the end portion of the corrosion-resistant material 12 on the outer side in the axial direction is located in the sleeve 9, the second welded portion 11 can be unobstructed. An end portion of the welded sleeve 9 on the outer side in the axial direction and an outer peripheral surface of the heat transfer tube 8 are formed. When not welding, the sleeve 9 and the heat transfer tube 8 can be fixed without hindrance. In other words, in addition to the actions and effects of the first and second embodiments, the corrosion-resistant material 12 can prevent corrosion of the heat transfer tube 8 and achieve long life at low cost without using an expensive heat transfer tube. Chemical.

另外，在整個傳熱管8的外周面包覆耐腐蝕材12之構成會導致熱交換效率下降，故不採用。 Further, the configuration in which the entire outer peripheral surface of the heat transfer tube 8 is coated with the corrosion-resistant material 12 causes a decrease in heat exchange efficiency, and thus it is not used.

第9圖係表示運用本發明的第4實施形態之防腐方法之傳熱管的固定構造之縱剖面圖。 Fig. 9 is a vertical cross-sectional view showing a fixing structure of a heat transfer tube to which the anticorrosion method according to the fourth embodiment of the present invention is applied.

該第4實施形態中，傳熱管8貫穿管板7並例如藉由焊接等固定於該管板7，套管19內插於傳熱管8而成為支撐於該傳熱管8之內套管。 In the fourth embodiment, the heat transfer tube 8 is inserted into the tube sheet 7 and fixed to the tube sheet 7 by welding or the like, and the sleeve 19 is inserted into the heat transfer tube 8 to be supported by the inner tube of the heat transfer tube 8. tube.

具體而言，套管19配置成內插於傳熱管8，其軸線方向內側的端部向比空氣入口側的管板7更內側成短條狀延伸出。在該套管19的外周面與傳熱管8的內周面之間，沿軸線方向分開配設一對O形環30、31。該O形環30、31隔著管板7位於兩側，藉由該O形環30、31，相對於傳熱管8定中心支撐套管19。又，該O形環30、31密封套管19與傳熱管8之間，且防止與燃燒廢氣進行熱交換之空氣(流體)從套管19與傳熱管8之間漏出。 Specifically, the sleeve 19 is disposed so as to be inserted into the heat transfer tube 8, and the end portion on the inner side in the axial direction extends in a short strip shape toward the inner side of the tube sheet 7 on the air inlet side. A pair of O-rings 30, 31 are disposed between the outer circumferential surface of the sleeve 19 and the inner circumferential surface of the heat transfer tube 8 in the axial direction. The O-rings 30, 31 are located on both sides across the tubesheet 7, and the O-rings 30, 31 center the support sleeve 19 with respect to the heat transfer tubes 8. Further, the O-rings 30, 31 seal between the sleeve 19 and the heat transfer tube 8, and prevent air (fluid) which exchanges heat with the combustion exhaust gas from leaking between the sleeve 19 and the heat transfer tube 8.

在該種第4實施形態的傳熱管的固定構造中，用於進 行熱交換之空氣以套管19的軸線方向外側的端部作為入口而流入，並流過套管19內，並以套管19的軸線方向內側的端部作為出口而流出，藉由在傳熱管8內朝下游側流動來與燃燒廢氣進行熱交換。 In the fixing structure of the heat transfer tube according to the fourth embodiment, The heat exchanged air flows in as an inlet at the outer end portion of the sleeve 19 in the axial direction, flows through the sleeve 19, and flows out at the inner end portion of the sleeve 19 in the axial direction as an outlet. The inside of the heat pipe 8 flows toward the downstream side to exchange heat with the combustion exhaust gas.

在此，用於進行熱交換之低溫空氣從套管19的出口流出，因此傳熱管8中的套管19的出口附近成為最低溫區域，在此會導致酸露點腐蝕C。 Here, the low-temperature air for performing heat exchange flows out from the outlet of the sleeve 19, so that the vicinity of the outlet of the sleeve 19 in the heat transfer tube 8 becomes the lowest temperature region, which causes acid dew corrosion C.

因此，該第4實施形態中，在傳熱管8上產生酸露點腐蝕C時，對應腐蝕C的程度(例如在傳熱管8開孔之前)，使套管19沿軸線方向移動。 Therefore, in the fourth embodiment, when the acid dew point C is generated in the heat transfer tube 8, the sleeve 19 is moved in the axial direction in accordance with the degree of corrosion C (for example, before the heat transfer tube 8 is opened).

具體而言，在維持將傳熱管8固定於管板7的狀態下，如第9圖中箭頭所示，使套管19沿軸線方向移動。在此，使套管19向內側(圖示左側)移動。此時，套管19經由O形環30、31支撐於傳熱管8，因此能夠容易沿著軸線方向移動。 Specifically, in a state where the heat transfer tube 8 is fixed to the tube sheet 7, the sleeve 19 is moved in the axial direction as indicated by an arrow in Fig. 9. Here, the sleeve 19 is moved inward (left side of the drawing). At this time, the sleeve 19 is supported by the heat transfer tube 8 via the O-rings 30 and 31, and thus can be easily moved in the axial direction.

而且，藉由以上套管19的移動，套管19的出口相對於傳熱管8沿著軸線方向移動，因此能夠使導致腐蝕之傳熱管8的低溫區域沿著軸線方向移動。 Further, by the movement of the above sleeve 19, the outlet of the sleeve 19 is moved in the axial direction with respect to the heat transfer tube 8, so that the low temperature region of the heat transfer tube 8 causing corrosion can be moved in the axial direction.

另外，在此，以肉眼識別傳熱管8的腐蝕C，並對應該腐蝕C的程度，使套管19沿著軸線方向移動，但例如亦可利用感測器和照像機等自動識別傳熱管8的腐蝕C的程度，並藉電腦自動決定移動時期。 Further, here, the corrosion C of the heat transfer tube 8 is visually recognized, and the sleeve 19 is moved in the axial direction to the extent that the C should be corroded, but for example, it can be automatically recognized by a sensor, a camera, or the like. The degree of corrosion C of the heat pipe 8 is automatically determined by the computer.

依該種第4實施形態，採用套管19經由傳熱管8相對於管板7卡合之構成，若傳熱管8腐蝕，則對應該腐蝕 C，在維持將傳熱管8固定於管板7的狀態下，使傳熱管8內的套管19沿軸線方向移動，因此，能夠使成為流過套管19內之空氣的出口之套管19的出口位置相對於傳熱管8沿著軸線方向移動，且能夠使產生於套管19的出口附近並導致傳熱管8腐蝕之低溫區域沿著軸線方向移動。亦即，藉由使套管19的出口位置沿軸線方向的移動，能夠沿著軸線方向改變所導致之傳熱管8的腐蝕位置。其結果，不使用高價的傳熱管而能夠以低成本因應腐蝕並實現長壽命化。 According to the fourth embodiment, the sleeve 19 is engaged with the tube sheet 7 via the heat transfer tube 8, and if the heat transfer tube 8 is corroded, it is corroded. C, in a state in which the heat transfer tube 8 is fixed to the tube sheet 7, the sleeve 19 in the heat transfer tube 8 is moved in the axial direction, so that the sleeve which is the outlet of the air flowing through the sleeve 19 can be made. The outlet position of the tube 19 is moved in the axial direction with respect to the heat transfer tube 8, and the low temperature region generated near the outlet of the sleeve 19 and causing corrosion of the heat transfer tube 8 can be moved in the axial direction. That is, by moving the outlet position of the sleeve 19 in the axial direction, the corrosion position of the heat transfer tube 8 caused by the axial direction can be changed. As a result, it is possible to achieve corrosion resistance at a low cost without using an expensive heat transfer tube and to achieve a long life.

又，作為與上述一方法不同之另一方法，可使套管19沿著軸線方向移動並更換為另一例如長度不同之套管。該情況下，亦能夠使導致傳熱管8腐蝕之套管19的出口位置相對於更換前的套管19的出口位置沿著軸線方向移動。亦即，藉由使套管19的出口位置沿軸線方向的移動，能夠沿軸線方向改變所導致之傳熱管8的腐蝕位置。其結果，不使用高價的傳熱管而能夠以低成本因應腐蝕並實現長壽命化。 Further, as another method different from the above method, the sleeve 19 can be moved in the axial direction and replaced with another sleeve having a different length, for example. In this case as well, the exit position of the sleeve 19 causing corrosion of the heat transfer tube 8 can be moved in the axial direction with respect to the exit position of the sleeve 19 before replacement. That is, by moving the outlet position of the sleeve 19 in the axial direction, the corrosion position of the heat transfer tube 8 caused by the axial direction can be changed. As a result, it is possible to achieve corrosion resistance at a low cost without using an expensive heat transfer tube and to achieve a long life.

另外，在傳熱管8的套管19側(導致腐蝕之位置)的外周面配置第3實施形態說明之耐腐蝕材為佳。依此，藉由耐腐蝕材，不使用高價的傳熱管而能夠以低成本防止傳熱管8的腐蝕並實現長壽命化。 Moreover, it is preferable to arrange the corrosion-resistant material described in the third embodiment on the outer circumferential surface of the heat transfer tube 8 on the side of the sleeve 19 (the position where corrosion occurs). According to this, it is possible to prevent corrosion of the heat transfer tube 8 at a low cost and to achieve a long life by using a corrosion-resistant material without using an expensive heat transfer tube.

如以上，第9圖所示之固定構造發揮熱交換器的防腐構造400的功能。防腐構造400具備作為傳熱管固定構件的管板7，與流過比該管板7更內側的流路之氣體進行熱 交換之傳熱管8，以及內插於傳熱管8之筒狀套管19，並支撐使傳熱管8以及套管19的至少一方能夠相對於管板7移動。熱交換器的防腐構造400，藉由管板7支撐套管19以及傳熱管8。如第9圖所示，套管19能夠在支撐於O形環30、31之狀態下相對於管板7(以及傳熱管8)移動。 As described above, the fixed structure shown in FIG. 9 functions as the anticorrosion structure 400 of the heat exchanger. The anti-corrosion structure 400 includes a tube sheet 7 as a heat transfer tube fixing member, and heats the gas flowing through a flow path inside the tube sheet 7 The exchange heat transfer tube 8 and the cylindrical sleeve 19 interposed in the heat transfer tube 8 are supported to move at least one of the heat transfer tube 8 and the sleeve 19 relative to the tube sheet 7. The anticorrosion structure 400 of the heat exchanger supports the sleeve 19 and the heat transfer tube 8 by the tube sheet 7. As shown in Fig. 9, the sleeve 19 is movable relative to the tube sheet 7 (and the heat transfer tube 8) while being supported by the O-rings 30, 31.

以上，對本發明依其實施形態具體進行了說明，但本發明並不限於上述實施形態，例如，在上述實施形態中，對循環流化床鍋爐100的燃燒廢氣中之運用進行了說明，但亦能夠運用於其他鍋爐的燃燒廢氣、焚化爐、熔煉爐等燃燒廢氣的進行，又，還能夠運用於氣化爐的熱解氣體(可燃性氣體)等的進行。 As described above, the present invention has been specifically described with reference to the embodiments. However, the present invention is not limited to the above-described embodiments. For example, in the above embodiment, the operation of the combustion exhaust gas of the circulating fluidized bed boiler 100 has been described, but It can be used in the combustion of exhaust gas, incinerators, and smelting furnaces in other boilers, and can also be applied to pyrolysis gases (flammable gases) in gasification furnaces.

又，上述實施形態中，尤其作為較佳者，雖然對空氣預熱器6的傳熱管8的運用進行了說明，但不只是對成為低溫腐蝕之酸露點腐蝕加以運用，還能夠對成為高溫腐蝕之熔融鹽腐蝕所產生之例如過熱器的傳熱管等加以運用，亦即，能夠對與氣體進行熱交換之熱交換器的傳熱管中腐蝕的產生或可能產生腐蝕之傳熱管加以運用。 Further, in the above-described embodiment, particularly, the operation of the heat transfer tube 8 of the air preheater 6 has been described. However, it is not only used for the acid dew point corrosion which is caused by low temperature corrosion, but also can be used for high temperature. A heat transfer tube such as a superheater produced by corrosion of a molten salt of corrosion is used, that is, a heat transfer tube capable of causing corrosion or possibly causing corrosion in a heat transfer tube of a heat exchanger that exchanges heat with a gas use.

7‧‧‧管板(傳熱管固定構件) 7‧‧‧ tube plate (heat transfer tube fixing member)

8‧‧‧傳熱管 8‧‧‧ heat transfer tube

9‧‧‧套管 9‧‧‧ casing

10‧‧‧第1焊接部 10‧‧‧1st welding department

11‧‧‧第2焊接部 11‧‧‧2nd Welding Department

200‧‧‧熱交換器的防腐結構 200‧‧‧Anti-corrosion structure of heat exchanger

C‧‧‧腐蝕 C‧‧‧Corrosion

Claims (8)

一種熱交換器的防腐方法，該熱交換器具備與流過比傳熱管固定構件更內側的流路之氣體進行熱交換之傳熱管，其特徵為：採用具備外插或內插於前述傳熱管之筒狀套管之構成，使前述傳熱管以及前述套管的至少一方相對於前述傳熱管固定構件移動。 An anticorrosion method for a heat exchanger, wherein the heat exchanger has a heat transfer tube that exchanges heat with a gas flowing through a flow path that is further inside the heat transfer tube fixing member, and is characterized in that it is externally inserted or interpolated in the foregoing The tubular sleeve of the heat transfer tube is configured to move at least one of the heat transfer tube and the sleeve relative to the heat transfer tube fixing member. 如申請專利範圍第1項記載之熱交換器的防腐方法，其中，採用具備貫穿前述傳熱管固定構件並固定於該傳熱管固定構件之前述套管，以及貫穿前述套管內並固定於該套管之前述傳熱管之構成，對應前述傳熱管的腐蝕，解除前述傳熱管與前述套管的固定，在維持將前述套管固定於前述傳熱管固定構件的狀態下，移動並更換前述傳熱管。 The method for preserving a heat exchanger according to claim 1, wherein the sleeve having the heat transfer tube fixing member and fixed to the heat transfer tube fixing member is inserted through the sleeve and fixed to the sleeve The heat transfer tube of the sleeve is configured to release the heat transfer tube from the ferrule in response to corrosion of the heat transfer tube, and move while maintaining the sleeve fixed to the heat transfer tube fixing member. And replace the aforementioned heat transfer tube. 如申請專利範圍第1項記載之熱交換器的防腐方法，其中，採用具備貫穿前述傳熱管固定構件並固定於該傳熱管固定構件之前述套管，以及貫穿前述套管內並固定於該套管之前述傳熱管之構成，對應前述傳熱管以及前述套管的至少一方的腐蝕，解除前述套管與前述傳熱管固定構件的固定，或前述傳熱管 與前述套管的固定，使已解除固定之前述套管或前述傳熱管沿著軸線方向移動，將移動後之前述套管或前述傳熱管固定於固定解除前被固定的對象側構件上。 The method for preserving a heat exchanger according to claim 1, wherein the sleeve having the heat transfer tube fixing member and fixed to the heat transfer tube fixing member is inserted through the sleeve and fixed to the sleeve The heat transfer tube of the sleeve is configured to cancel the fixation of the sleeve and the heat transfer tube fixing member, or the heat transfer tube, according to corrosion of at least one of the heat transfer tube and the sleeve. Fixing with the sleeve, moving the unfixed sleeve or the heat transfer tube in the axial direction, and fixing the moved sleeve or the heat transfer tube to the object side member fixed before the fixing is released . 如申請專利範圍第1至3項中任一項記載之熱交換器的防腐方法，其中，在前述傳熱管的前述套管側的外周面配置耐腐蝕材。 The anticorrosive method of the heat exchanger according to any one of the first to third aspects of the present invention, wherein a corrosion-resistant material is disposed on an outer circumferential surface of the heat transfer tube on the sleeve side. 如申請專利範圍第4項記載之熱交換器的防腐方法，其中，採用具備貫穿前述傳熱管固定構件並固定於該傳熱管固定構件之前述套管，以及貫穿前述套管內並固定於該套管之前述傳熱管之構成，前述耐腐蝕材包覆於前述傳熱管的前述套管側的外周面，其軸線方向外側的端部位於前述套管內，並且其軸線方向內側的端部比前述套管的軸線方向內側的端部更靠軸線方向內側延伸並露出。 The anticorrosion method of the heat exchanger according to claim 4, wherein the sleeve having the heat transfer tube fixing member and fixed to the heat transfer tube fixing member is inserted through the sleeve and fixed to the sleeve In the heat transfer tube of the sleeve, the corrosion-resistant material is coated on the outer peripheral surface of the sleeve side of the heat transfer tube, and an end portion in the axial direction outer side is located in the sleeve and is axially inside. The end portion extends inward in the axial direction from the end portion on the inner side in the axial direction of the sleeve and is exposed. 如申請專利範圍第1項記載之熱交換器的防腐方法，其中，採用具備貫穿前述傳熱管固定構件並固定於該傳熱管固定構件之前述傳熱管，以及貫穿前述傳熱管內並被支撐且與前述氣體進行熱交換之流體流過內部之套管之構成，對應前述傳熱管的腐蝕，使前述套管移動。 The anticorrosion method of the heat exchanger according to claim 1, wherein the heat transfer tube having the heat transfer tube fixing member and fixed to the heat transfer tube fixing member is inserted through the heat transfer tube The fluid supported and exchanged with the gas flows through the inner sleeve, and the sleeve is moved in response to corrosion of the heat transfer tube. 如申請專利範圍第6項記載之熱交換器的防腐方法，其中， 在前述傳熱管的前述套管側的外周面配置耐腐蝕材。 The anticorrosion method of the heat exchanger according to Item 6 of the patent application, wherein A corrosion-resistant material is disposed on the outer circumferential surface of the heat transfer tube on the sleeve side. 一種熱交換器的防腐構造，其特徵為：具備傳熱管固定構件、與流過比該傳熱管固定構件更內側的流路之氣體進行熱交換之傳熱管，以及外插或內插於前述傳熱管之筒狀套管，支撐前述傳熱管以及前述套管的至少一方可相對於前述傳熱管固定構件移動。 A corrosion protection structure for a heat exchanger, comprising: a heat transfer tube fixing member; a heat transfer tube that exchanges heat with a gas flowing through a flow path inside the heat transfer tube fixing member; and an extrapolation or interpolation At least one of the heat transfer tube and the sleeve supported by the cylindrical sleeve of the heat transfer tube is movable relative to the heat transfer tube fixing member.
TW103104704A 2013-03-08 2014-02-13 Anticorrosion method of heat exchanger and anticorrosive structure of heat exchanger TWI520894B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2013046962 2013-03-08
JP2013046963 2013-03-08
JP2013046961 2013-03-08
JP2013095529 2013-04-30

Publications (2)

Publication Number Publication Date
TW201434728A true TW201434728A (en) 2014-09-16
TWI520894B TWI520894B (en) 2016-02-11

Family

ID=51491052

Family Applications (1)

Application Number Title Priority Date Filing Date
TW103104704A TWI520894B (en) 2013-03-08 2014-02-13 Anticorrosion method of heat exchanger and anticorrosive structure of heat exchanger

Country Status (5)

Country Link
JP (1) JP6320992B2 (en)
MY (1) MY177269A (en)
PH (1) PH12015501977A1 (en)
TW (1) TWI520894B (en)
WO (1) WO2014136527A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102415825B1 (en) * 2020-06-30 2022-07-01 비에이치아이(주) Structure and method for intalling reheater for cfbc boiler
JPWO2022265118A1 (en) * 2021-06-18 2022-12-22

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5599587A (en) * 1979-01-25 1980-07-29 Gadelius Kk Rotary type heat exchanger with heat pipe
JPS5761389U (en) * 1980-09-27 1982-04-12
JPS60193288U (en) * 1984-06-04 1985-12-23 福山共同機工株式会社 Pipe inner surface cleaning device
JP2002062081A (en) * 2000-08-10 2002-02-28 Ishikawajima Harima Heavy Ind Co Ltd Multi-tubular heat exchanger
JP4865256B2 (en) * 2005-06-06 2012-02-01 三菱重工業株式会社 HEAT EXCHANGER AND HEAT EXCHANGER MANUFACTURING METHOD
JP2010191494A (en) * 2009-02-16 2010-09-02 Mitsubishi Heavy Ind Ltd System and method for diagnosing remaining life of high temperature plant equipment
JP4959756B2 (en) * 2009-07-22 2012-06-27 中国電力株式会社 Heat exchanger repair method
JP3180377U (en) * 2012-10-04 2012-12-13 三菱重工環境・化学エンジニアリング株式会社 Heat exchanger

Also Published As

Publication number Publication date
JPWO2014136527A1 (en) 2017-02-09
PH12015501977B1 (en) 2016-01-18
PH12015501977A1 (en) 2016-01-18
MY177269A (en) 2020-09-10
TWI520894B (en) 2016-02-11
JP6320992B2 (en) 2018-05-09
WO2014136527A1 (en) 2014-09-12

Similar Documents

Publication Publication Date Title
KR101732782B1 (en) Heat exchanger having enhanced corrosion resistance
US20230258326A1 (en) Systems and methods for utilizing flue gas
Kawahara Application of high temperature corrosion-resistant materials and coatings under severe corrosive environment in waste-to-energy boilers
US10309731B2 (en) Compliant heating system comprising a compressive seal expansion joint
CA2218042A1 (en) Ceramic heat exchanger system
US20210293411A1 (en) Corrosion Resistant Air Preheater with Lined Tubes
TWI520894B (en) Anticorrosion method of heat exchanger and anticorrosive structure of heat exchanger
DK1831604T3 (en) PROCEDURE FOR REDUCING GOVERNMENT CORRUSION
EP3124862B1 (en) Heat transfer tube for fluidized-bed boiler
JP6876087B2 (en) Protector and boiler device
EP3273162B1 (en) Thermal device, its use, and method for heating a heat transfer medium
JP2018162917A (en) Method for operating gas preheating device
JP2002317903A (en) Boiler equipped with corrosion resistant heat transfer pipe for heat exchange
CN207584803U (en) The protector of heat-transfer pipe, the heat exchanger and boiler for having the protector
JP2005069575A (en) Heat exchanger
JP2020101320A (en) Seal structure of boiler, boiler, and method for operating boiler
JP5366851B2 (en) Heat exchanger
CN211902819U (en) Boiler with reheating municipal refuse and sludge for combustion
JP7130569B2 (en) HEAT EXCHANGER, BOILER, AND METHOD FOR ADJUSTING HEAT EXCHANGER
JP7237653B2 (en) Boiler heat transfer tube support device, boiler, boiler heat transfer tube support method, boiler heat transfer tube replacement method, and boiler heat transfer tube support device replacement method
JP4052467B2 (en) Fluidized bed heat exchanger and boiler equipment
JP2004163062A (en) Heat transfer tube for boiler
JP2006162103A (en) Heat exchanger
JPH0682005A (en) Boiler equipped with refuse incinerator
JP2007147159A (en) Membrane wall for boiler, and boiler device using it

Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees