JPH0749197A - Heat exchanger - Google Patents
Heat exchangerInfo
- Publication number
- JPH0749197A JPH0749197A JP14608293A JP14608293A JPH0749197A JP H0749197 A JPH0749197 A JP H0749197A JP 14608293 A JP14608293 A JP 14608293A JP 14608293 A JP14608293 A JP 14608293A JP H0749197 A JPH0749197 A JP H0749197A
- Authority
- JP
- Japan
- Prior art keywords
- heat transfer
- transfer tube
- heat exchanger
- heat
- corrosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はボイラ排ガス処理装置の
ように、粉塵を含む腐食性ガスを処理する熱交換器の改
良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a heat exchanger for treating corrosive gas containing dust, such as a boiler exhaust gas treatment device.
【０００２】[0002]
【従来の技術】ボイラ排ガスによる環境汚染対策などで
は脱硫装置がボイラ後流に設けられており、大形プラン
トでは特に湿式脱硫装置が採用される場合が多い。この
とき、湿式脱硫装置内で処理ガスが６０℃付近まで冷却
されるため、スタックから大気中に排出されたガスが高
く上空に昇って拡散し接地部の亜硫酸ガス濃度を低下さ
せるべく脱硫装置処理ガスを排出前に再加熱する方法が
最近では常用されている。これには蓄熱形回転式熱交換
器（ユングストローム型）や管式熱交換器が使用される
事が多い。2. Description of the Related Art A desulfurization device is provided downstream of a boiler in order to prevent environmental pollution due to boiler exhaust gas, and a large-scale plant often employs a wet desulfurization device. At this time, since the process gas is cooled to around 60 ° C. in the wet desulfurization device, the gas discharged from the stack into the atmosphere is high and rises to the sky and diffuses to reduce the sulfurous acid gas concentration in the grounding part to reduce the sulfur dioxide gas concentration. Recently, a method of reheating the gas before discharging it is commonly used. For this purpose, heat storage type rotary heat exchangers (Jungstrom type) and tube heat exchangers are often used.
【０００３】図５にこのようなシステムの概略を示して
いる。図５において、ボイラ１に空気予熱器２によって
加熱された空気が燃料と共に送入され燃焼する際、給水
を加熱して蒸気を発生させる。ボイラの燃焼ガスは空気
予熱器２で燃焼用空気を加熱した後、約１２０〜１５０
℃で電気集塵器３に送られガス中のダストが大部分分離
され除去される。更に脱塵ガスは熱回収用熱交換器４で
熱媒を加熱した後、湿式脱硫装置５で亜硫酸ガスを除去
される。FIG. 5 shows an outline of such a system. In FIG. 5, when the air heated by the air preheater 2 is fed into the boiler 1 together with the fuel and burns, the feed water is heated to generate steam. After the combustion gas is heated by the air preheater 2 in the boiler combustion gas, it is heated to about 120 to 150
Most of the dust in the gas sent to the electrostatic precipitator 3 at ℃ is separated and removed. Further, the dedusted gas is heated by the heat recovery heat exchanger 4 to heat the heating medium, and then the sulfur dioxide is removed by the wet desulfurization device 5.
【０００４】このとき、処理ガス温度は入口側で約１０
０℃前後、出口側で６０℃程度となるが、６０℃程度の
ガスは大気との比重差が小さく大気中で高空に上昇し拡
散する力が小さいので、熱回収用熱交換器４で加熱した
熱媒を再加熱用熱交換器６に送り脱硫装置排ガスと熱交
換させ排ガスを１００℃近辺まで加熱して拡散力を高め
スタック７から大気に放出する。At this time, the processing gas temperature is about 10 at the inlet side.
About 0 ° C, about 60 ° C at the outlet side, the gas at about 60 ° C has a small specific gravity difference with the atmosphere and has a small force to rise to the sky and diffuse in the atmosphere, so the gas is heated by the heat recovery heat exchanger 4. The heat medium is sent to the reheating heat exchanger 6 to exchange heat with the desulfurization device exhaust gas, and the exhaust gas is heated to around 100 ° C. to enhance the diffusion power and released from the stack 7 to the atmosphere.
【０００５】熱回収用熱交換器４と再加熱用熱交換器６
の熱交換を達成するために、蓄熱回転体を使うのがユン
グストローム式熱交換器であり、上記説明のように熱媒
を用い伝熱管内に熱媒、管外に処理ガスを流して熱交換
するのが管式熱交換器である。蓄熱方式は同一器内の回
転隔壁を持つ通路を脱硫前後のガスが同時に通過するた
め少量ではあるが両者の混合が生ずるため、高度脱硫は
難しい。一方、管式熱交換器の場合、両ガスは隔絶され
た流路を通り混合は皆無で高度脱硫に適し、厳しい環境
保善に適した方式となる。Heat recovery heat exchanger 4 and reheating heat exchanger 6
In order to achieve heat exchange, the Jungstrom type heat exchanger uses a heat storage rotating body.As described above, a heat medium is used to flow the heat medium into the heat transfer tube and the process gas to the outside to generate heat. It is a tube heat exchanger that is exchanged. In the heat storage method, advanced desulfurization is difficult because the gas before and after desulfurization simultaneously passes through a passage having a rotary partition wall in the same unit, but a small amount of the two mixes with each other. On the other hand, in the case of the tube heat exchanger, both gases pass through the separated flow paths and are not mixed and are suitable for advanced desulfurization, which is suitable for severe environmental protection.
【０００６】ボイラで燃料が燃焼する際には、燃料中の
硫黄分は硫黄酸化物となり大部分は亜硫酸ガス（Ｓ
Ｏ2 ）となるが、極く一部（ＳＯ2 の１〜２％）は３酸
化硫黄（ＳＯ3 ）ガスとなり燃焼ガス中に混在してお
り、空気予熱器や熱回収用熱交換器４などでガスが冷却
される時、硫酸の露点になるとガス中の水蒸気と反応し
て硫酸が生成し熱交換器材料の腐食をひき起こし、運転
トラブルの原因となる。When the fuel burns in the boiler, the sulfur content in the fuel becomes sulfur oxides, and most of the sulfurous acid gas (S
O 2) and becomes, 1-2% small portion (SO 2) is sulfur trioxide (SO 3) are mixed in the combustion gas becomes a gas, air preheater and heat recovery heat exchanger 4 When the gas is cooled by, for example, the dew point of sulfuric acid, the sulfuric acid reacts with the water vapor in the gas to form sulfuric acid, which causes corrosion of the heat exchanger material and causes operating troubles.
【０００７】蓄熱方式では熱交換エレメントのセラミッ
ク化等が対策されている。また管式熱交においてはプラ
スチック被覆熱交換器が小形装置では実用され始めてい
るが、定修時のメインテナンス作業等には伝熱管被覆に
損傷を与えないように厳重な取扱いを要求されている。
また運転中にダスト付着の恐れがある場合は、図６のよ
うに上部ガス室空間にスプレーノズル１４を持つ複数の
洗滌ノズル母管１５を設けたものが実用されているが、
実用上、ノズルの詰りや腐食の点検、ノズルの取換えな
どが運転中は不可能で連続運転はできず、必要時には全
プロセスの停止が必要になる。In the heat storage system, measures such as making the heat exchange element ceramic are taken. Further, in tube heat exchange, plastic-coated heat exchangers have begun to be put to practical use in small-sized equipment, but strict handling is required during maintenance work, etc. so as not to damage the heat transfer tube coating.
In addition, when there is a risk of dust adhesion during operation, it is practical to use a plurality of cleaning nozzle mother pipes 15 having spray nozzles 14 in the upper gas chamber space as shown in FIG.
In practice, it is impossible to check nozzles for clogging and corrosion, and replace nozzles during operation, and continuous operation cannot be performed. When necessary, it is necessary to stop all processes.
【０００８】エネルギ需要の拡大や立地条件の多様化が
進むに従い、燃料として、高硫黄含量の石炭や油が使用
されるようになってきたが、これらの燃料を焚くボイラ
の排ガスから熱回収しようとすると、熱交換部で冷やさ
れたボイラ排ガスは硫酸が露点となり熱濃硫酸が発生す
る。熱濃硫酸は腐食性が激しくハステロイなどの耐酸金
属も長期使用は不可能となり、ガラス、ホーローのよう
な無機材料や弗素樹脂のような限られた有機材料しか耐
用できないのが現状である。As the demand for energy and the diversification of location conditions have advanced, coal and oil with a high sulfur content have come to be used as fuel. Let's recover heat from the exhaust gas of a boiler burning these fuels. Then, in the boiler exhaust gas cooled in the heat exchange section, sulfuric acid becomes a dew point and hot concentrated sulfuric acid is generated. Hot concentrated sulfuric acid is highly corrosive, and acid-resistant metals such as Hastelloy cannot be used for a long period of time, and it is the current situation that only inorganic materials such as glass and enamel and limited organic materials such as fluororesins can be used.
【０００９】これらの材料は衝撃等で割れやすい、ある
いは傷がつきやすいなどの材料特性上の問題がある。一
般に伝熱管強度を保持させるため金属管にこれら耐食材
料を被覆するが、製作時やメインテナンス時には被覆に
損傷を与えないように留意が必須となる。特に有機材料
の場合、硬度が低く、擦過傷がつきやすく、装置内の堆
積煤塵（粉体）除去にスートブロワなどの高速流利用装
置は使用できず、何らかの対応策が必要となる。管群ク
リーニング方法として図６に示すような水洗方法が考え
られるが、水供給システムの簡便さや材料腐食やノズル
部の閉塞対策への簡便性・確実性が課題となる。These materials have problems in material properties such that they are easily cracked by impact or are easily scratched. In general, metal tubes are coated with these corrosion-resistant materials in order to maintain the strength of the heat transfer tube, but it is essential to take care not to damage the coating during production or maintenance. Particularly in the case of an organic material, the hardness is low and it is easily scratched, and a high-speed flow utilizing device such as a soot blower cannot be used for removing accumulated dust (powder) in the device, and some countermeasure is required. A water washing method as shown in FIG. 6 is conceivable as a tube group cleaning method, but the simplicity and reliability of the water supply system and measures against material corrosion and nozzle blockage pose problems.
【００１０】[0010]
【発明が解決しようとする課題】本発明は、従来の技術
にみられた前記問題点に鑑み、硫酸等が生成される腐食
性の雰囲気中で長期間耐用可能な熱交換器を提供するこ
とを課題としている。また、本発明は、運転中やメイン
テナンス中の損傷はもとより、製作中や輸送中の損傷な
ど腐食発生の原因となる耐食材被覆損傷を防ぐことので
きる熱交換器を提供することも課題としている。更にま
た、本発明は構造が簡単で点検等を容易に行える熱交換
器を提供することも課題としている。SUMMARY OF THE INVENTION In view of the above-mentioned problems in the prior art, the present invention provides a heat exchanger that can be used for a long period of time in a corrosive atmosphere where sulfuric acid or the like is generated. Is an issue. Another object of the present invention is to provide a heat exchanger capable of preventing not only damage during operation and maintenance, but also damage due to corrosion of the food material that causes corrosion such as damage during manufacture and transportation. . Still another object of the present invention is to provide a heat exchanger which has a simple structure and can be easily inspected.
【００１１】[0011]
【課題を解決するための手段】熱濃硫酸に対する耐食性
が十分で、かつ大形装置の製作が可能な材料として弗素
樹脂等の耐食材を被覆した被覆管を伝熱管として使用す
る。このとき、伝熱管群の製作上、傷がつきやすい伝熱
管群上層外殻には伝熱管群保護部材を一層以上配置し、
運転中でも抜き差しして取換え（さし換え）可能な構造
とする。この伝熱管群保護部材は棒でも筒状体でもよ
い。伝熱管群保護部材は伝熱管群の上層外殻に加え、伝
熱管群の最底層外殻にも配設し伝熱管群へ傷がつくのを
両方で防ぐようにしてもよい。As a heat transfer tube, a coated tube coated with a corrosion resistant material such as a fluororesin is used as a material having sufficient corrosion resistance to hot concentrated sulfuric acid and capable of manufacturing a large-sized apparatus. At this time, in manufacturing the heat transfer tube group, one or more heat transfer tube group protection members are arranged in the outer shell of the heat transfer tube group that is easily scratched,
The structure is such that it can be inserted and removed (replaced) even during operation. The heat transfer tube group protection member may be a rod or a tubular body. The heat transfer tube group protection member may be arranged not only on the upper shell of the heat transfer tube group but also on the outermost shell of the heat transfer tube group to prevent the heat transfer tube group from being damaged by both.
【００１２】上記伝熱管群上層に設ける伝熱管群保護部
材は定期的取換えを前提としたハステロイなどの高級耐
食材あるいは弗素樹脂等の耐食材被覆管等を用い、か
つ、その一部の保護部材は伝熱管群へ洗滌水を供給する
多孔ノズルを開口させた水洗用直管ノズルとして構成す
る。As the heat transfer tube group protection member provided in the upper layer of the heat transfer tube group, a high-grade food material such as Hastelloy or a food material-coated tube such as fluororesin, which is premised on periodical replacement, is used, and a part thereof is protected. The member is configured as a straight pipe nozzle for washing with an opening of a multi-hole nozzle for supplying washing water to the heat transfer tube group.
【００１３】使用燃料の種類によっては必要により、伝
熱管群内部にも、上記多孔ノズルを備えた管を配置して
も良い（この場合多孔ノズルを備えた管は、伝熱管群に
対する傷つき保護機能は期待しなくて良い）。Depending on the type of fuel used, if necessary, a tube provided with the above-mentioned multi-hole nozzle may be arranged inside the heat transfer tube group (in this case, the tube provided with the multi-hole nozzle has a function of protecting the heat transfer tube group from scratches). Do not have to expect).
【００１４】これら保護洗滌管は伝熱管群に対する洗滌
効果を上げるため、管軸を中心とし±９０°以内の回転
往復動（スイング）を与える場合もある。In order to improve the cleaning effect on the heat transfer tube group, these protective cleaning tubes may be given a rotational reciprocating motion (swing) within ± 90 ° about the tube axis.
【００１５】[0015]
【作用】本発明による伝熱管においては、打撃や擦過で
傷が入りやすい耐食材被覆伝熱管群の外層を囲う伝熱管
群保護部材を設けているので被覆伝熱管の耐食性が損わ
れない。また、その伝熱管群保護部材の一部は、運転中
でも交換可能な抜き差し可能でメインテナンスが容易で
ある。また、その伝熱管群保護部材の一部をノズル管と
して伝熱管群をクリーニングする洗滌水を供給できる構
造としたことにより器材が共用されて経済的である。In the heat transfer tube according to the present invention, since the heat transfer tube group protection member that surrounds the outer layer of the food material coated heat transfer tube group, which is likely to be damaged by hitting or rubbing, is provided, the corrosion resistance of the heat transfer tube is not impaired. Further, a part of the heat transfer tube group protection member can be exchanged even during operation and can be inserted / removed to facilitate maintenance. Further, since a part of the heat transfer tube group protecting member is used as a nozzle tube to supply the washing water for cleaning the heat transfer tube group, the equipment is shared and it is economical.
【００１６】また、本発明による熱交換器では、運転
中、抜き出し可能な水洗用直管ノズル構造を採用するこ
とで、構造材腐食状況のチェック可能化、ノズル部のク
リーニングなどのメインテナンス容易化を達成してい
る。本発明では水洗用直管ノズルを採用したことによ
り、ノズルの回転スイング機能を付加して伝熱管群に対
する内部洗滌能力を増加させることも可能である。Further, in the heat exchanger according to the present invention, by adopting a straight pipe nozzle structure for water washing that can be taken out during operation, it is possible to check the corrosion state of the structural material and facilitate maintenance such as cleaning of the nozzle portion. Has achieved. By adopting the straight pipe nozzle for washing in the present invention, it is possible to add a rotary swing function of the nozzle to increase the internal cleaning ability for the heat transfer tube group.
【００１７】[0017]
【実施例】以下、本発明による熱交換器を図１〜図３に
示した一実施例に基づいて具体的に説明する。図１は、
約３％以上の高い硫黄含有量を持つ石炭を常用燃料とす
る石炭だきボイラの熱回収用熱交換器として構成した本
発明の一実施例による熱交換器を示す。電気集塵器を通
ってこの熱交換器に入る排ガス温度は約１４０℃であ
り、熱交換器出口温度は約１０５℃である。このとき、
処理排ガス中のＳＯ3 濃度は約１５ＰＰＭであり、熱交
換器内での凝縮生成硫酸濃度は最高約７５％となる（図
４）。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A heat exchanger according to the present invention will be specifically described below with reference to an embodiment shown in FIGS. Figure 1
1 shows a heat exchanger according to an embodiment of the present invention configured as a heat recovery heat exchanger for a coal fired boiler using coal having a high sulfur content of about 3% or more as a regular fuel. The exhaust gas temperature entering the heat exchanger through the electrostatic precipitator is about 140 ° C and the heat exchanger outlet temperature is about 105 ° C. At this time,
The SO 3 concentration in the treated exhaust gas is about 15 PPM, and the concentration of sulfuric acid produced by condensation in the heat exchanger is about 75% at maximum (FIG. 4).
【００１８】熱交換器の構成は図１及び図２に示すよう
に伝熱管バンドル８内部に伝熱管ヘッダ１０ａ及び１０
ｂに接続した弗素樹脂すなわちテトラフルオロエチレン
を使用した耐食被覆管９を複数本設けて必要伝熱面積を
満たし、熱硫酸雰囲気での性能を確保している。ケーシ
ング部は伝熱管より腐食環境が厳しくないためハステロ
イを使用している。図２のとおり伝熱管９の上方には、
２段の保護棒（管）１１を千鳥に配置しその下段管の間
に規則的に図２、図３に示すような洗滌用直管ノズル１
２を配置した。実際的には直管ノズル１２の配置は燃料
の種類等の条件で変り、任意で良い。As shown in FIGS. 1 and 2, the heat exchanger has a heat transfer tube header 10a and 10 inside the heat transfer tube bundle 8 as shown in FIGS.
A plurality of corrosion-resistant coating pipes 9 using a fluororesin, that is, tetrafluoroethylene, connected to b are provided to fill the required heat transfer area and ensure the performance in a hot sulfuric acid atmosphere. Hastelloy is used in the casing because it is less corrosive than the heat transfer tubes. As shown in FIG. 2, above the heat transfer tube 9,
Two-stage protection rods (tubes) 11 are arranged in a staggered manner, and a straight pipe nozzle 1 for cleaning as shown in FIGS. 2 and 3 is regularly arranged between the lower pipes.
2 was placed. Practically, the arrangement of the straight pipe nozzle 12 may be arbitrarily changed depending on the conditions such as the type of fuel.
【００１９】保護棒（管）１１と洗滌用直管ノズル１２
はハステロイ材にテフロン被覆を施している。両者とも
熱交換器側壁の取付け穴から挿入して抜き差しできる直
管構造としており、運転中の点検あるいはメインテナン
スを可能にしている。洗滌管１２各々の作動時には、図
に示していない駆動装置により、管１２の鉛直線に対し
ノズル孔（即ち洗滌管の管軸）を±３０°スイング（往
復回転動）して伝熱管群８に対する洗滌範囲を拡大して
いる。Protective rod (tube) 11 and straight nozzle 12 for cleaning
Has a Teflon coating on Hastelloy. Both have a straight pipe structure that can be inserted and removed through the mounting holes on the side wall of the heat exchanger, allowing inspection during operation or maintenance. When each of the cleaning pipes 12 is operated, a driving device (not shown) swings the nozzle hole (that is, the pipe axis of the cleaning pipe) ± 30 ° with respect to the vertical line of the pipe 12 (reciprocating rotary motion) to transfer the heat transfer tube group 8 The scope of cleaning has been expanded.
【００２０】これらの洗滌管の使用については、熱交換
器の伝熱管の汚れ形態によって、洗滌水の導入、噴霧ス
ケジュールを決めてプログラムに従い作動させることが
できる。更に熱交換器に要求される条件によっては、熱
交換器のバンドル構成を細区分して、各区分伝熱管の出
口液体温度を検出し、基準数値との比較により洗滌必要
管群を決め、洗滌水導入を行う制御系とする場合もあ
る。Regarding the use of these washing pipes, introduction of washing water and a spraying schedule can be determined and operated according to a program depending on the form of contamination of the heat transfer pipes of the heat exchanger. Further, depending on the conditions required for the heat exchanger, the bundle configuration of the heat exchanger is subdivided, the outlet liquid temperature of each section heat transfer tube is detected, and the required cleaning tube group is determined by comparison with the reference value and the cleaning is performed. It may be used as a control system for introducing water.
【００２１】[0021]
【発明の効果】本発明によれば硫酸等の生成する腐食性
雰囲気で使用される熱交換器の長期耐用性が実現され、
かつ、運転の安定性、信頼性が保証できる。これは特に
事業用（発電用）石炭だきボイラにおいて高硫黄炭の使
用を可能とするものでメリットが大きい。即ち、弗素樹
脂等の被覆伝熱管を用いるため、高硫黄燃料を使用して
も燃焼ガスの冷却によって発生する硫酸により管材の腐
食トラブルが発生しない。According to the present invention, long-term durability of a heat exchanger used in a corrosive atmosphere in which sulfuric acid or the like is generated is realized,
In addition, the stability and reliability of operation can be guaranteed. This is particularly advantageous because it enables the use of high-sulfur coal in commercial (power generation) coal-fired boilers. That is, since a coated heat transfer tube made of fluorine resin or the like is used, even if a high sulfur fuel is used, corrosion problems of the pipe material do not occur due to sulfuric acid generated by cooling the combustion gas.
【００２２】しかも、本発明による熱交換器では伝熱管
群の外周（外殻）を保護部材で囲んであるため、製作及
び輸送中あるいは運転中やメインテナンス中での器物の
落下等で被覆伝熱管の被膜を傷つけ、損傷して伝熱管基
材を腐食させるトラブルが防止できる。Moreover, in the heat exchanger according to the present invention, since the outer periphery (outer shell) of the heat transfer tube group is surrounded by the protective member, the heat transfer tube is covered by a falling object during manufacture and transportation, during operation, or during maintenance. It is possible to prevent the trouble of damaging and damaging the coating of (1) and corroding the heat transfer tube base material.
【００２３】また、本発明による熱交換器では、伝熱管
保護部材の一部を活用して取換え（挿入）可能な洗滌用
の多孔直管ノズルを設けているため、熱交換器構造が単
純で簡易になり、かつ、運転中のノズル検査（腐食の進
行状況、ノズルの閉塞有無のチェック）が容易になり、
検査の結果で必要に応じてのクリーニングや交換も可能
となる。これにより長期連続運転が保証できる。更にま
た、本発明の熱交換器では採用している洗滌管が直管の
ため管の回転運動が可能で、回転往復動により伝熱管に
対する洗滌範囲の拡大、洗滌能力の増強が達成できる。Further, in the heat exchanger according to the present invention, since the perforated straight tube nozzle for cleaning which can be replaced (inserted) is provided by utilizing a part of the heat transfer tube protection member, the heat exchanger structure is simple. It becomes simpler, and the nozzle inspection during operation (checking the progress of corrosion and the presence or absence of nozzle blockage) becomes easier.
The inspection result also enables cleaning and replacement if necessary. This guarantees long-term continuous operation. Furthermore, since the cleaning pipe employed in the heat exchanger of the present invention is a straight pipe, the pipe can be rotated, and the reciprocating motion of rotation can expand the cleaning range for the heat transfer pipe and enhance the cleaning capability.
【図１】本発明の第１実施例による熱交換器における伝
熱管バンドルの斜視図、FIG. 1 is a perspective view of a heat transfer tube bundle in a heat exchanger according to a first embodiment of the present invention,
【図２】図１に示した伝熱管バンドルにおける伝熱管と
保護棒（管）及び洗滌用直管ノズルの配置状況を示す図
面、2 is a drawing showing the arrangement of heat transfer tubes, protective rods (tubes), and straight tube nozzles for cleaning in the heat transfer tube bundle shown in FIG.
【図３】洗滌ノズル管の構造例を示すし、（ａ）は一部
破断した側面図、（ｂ）は横断面図、FIG. 3 shows a structural example of a cleaning nozzle tube, (a) is a partially broken side view, (b) is a cross-sectional view,
【図４】燃焼排ガスの硫酸凝縮線を示すグラフ、FIG. 4 is a graph showing a sulfuric acid condensation line of combustion exhaust gas,
【図５】従来の発電用ボイラにおける排ガス処理系統を
示すシステム図、FIG. 5 is a system diagram showing an exhaust gas treatment system in a conventional power generation boiler;
【図６】従来の熱交換器における洗滌機構の例を示す側
面図。FIG. 6 is a side view showing an example of a cleaning mechanism in a conventional heat exchanger.
８ 伝熱管バンドル ９ 耐食被覆伝熱管 １０ａ 伝熱管ヘッダ（熱媒入口側） １０ｂ 伝熱管ヘッダ（熱媒出口側） １１ 保護棒（管） １２ 洗滌ノズル管 １３ ノズル孔 １４ スプレーノズル １５ 洗滌ノズル母管 8 Heat Transfer Tube Bundle 9 Corrosion Resistant Coating Heat Transfer Tube 10a Heat Transfer Tube Header (Heating Medium Inlet Side) 10b Heat Transfer Tube Header (Heating Medium Exit Side) 11 Protective Rod (Tube) 12 Cleaning Nozzle Tube 13 Nozzle Hole 14 Spray Nozzle 15 Cleaning Nozzle Mother Tube
Claims (1)
熱管群を備えた熱交換器において、前記伝熱管群の外側
に外部から抜き差し可能に設けられた伝熱管群保護部材
を有し、同伝熱管群保護部材の一部を前記伝熱管群に対
する水洗用直管ノズルとしたことを特徴とする熱交換
器。1. A heat exchanger having a heat transfer tube group composed of heat transfer tubes covered with a food-resistant material, the heat exchanger tube protection member being provided outside the heat transfer tube group so as to be removable from the outside. A heat exchanger characterized in that a part of the heat transfer tube group protecting member is a straight nozzle for washing the heat transfer tube group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14608293A JPH0749197A (en) | 1993-06-17 | 1993-06-17 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14608293A JPH0749197A (en) | 1993-06-17 | 1993-06-17 | Heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0749197A true JPH0749197A (en) | 1995-02-21 |
Family
ID=15399716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14608293A Withdrawn JPH0749197A (en) | 1993-06-17 | 1993-06-17 | Heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0749197A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010255925A (en) * | 2009-04-24 | 2010-11-11 | Mitsubishi Heavy Industries Mechatronics Systems Ltd | Cleaning device for exhaust gas heat recovery device |
-
1993
- 1993-06-17 JP JP14608293A patent/JPH0749197A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010255925A (en) * | 2009-04-24 | 2010-11-11 | Mitsubishi Heavy Industries Mechatronics Systems Ltd | Cleaning device for exhaust gas heat recovery device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000905 |