JPH081408Y2 - High dust exhaust gas waste heat recovery system - Google Patents
High dust exhaust gas waste heat recovery systemInfo
- Publication number
- JPH081408Y2 JPH081408Y2 JP1987187995U JP18799587U JPH081408Y2 JP H081408 Y2 JPH081408 Y2 JP H081408Y2 JP 1987187995 U JP1987187995 U JP 1987187995U JP 18799587 U JP18799587 U JP 18799587U JP H081408 Y2 JPH081408 Y2 JP H081408Y2
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- exhaust gas
- water
- liquid
- floating plate
- 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.)
- Expired - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Paper (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案は、高含じん排ガスから廃熱を回収して温水を
得るのに用いられる排ガス廃熱回収装置に関するもので
あり、特に、黒液回収設備のソーダ回収ボイラから排出
される高含じん排ガスから廃熱を回収し、清水を加熱し
て温水を得るための低コストで高効率な高含じん排ガス
廃熱回収装置に関するものである。TECHNICAL FIELD The present invention relates to an exhaust gas waste heat recovery device used for recovering waste heat from high dust content exhaust gas to obtain hot water, and in particular to a black liquor recovery facility. The present invention relates to a low-cost, high-efficiency high-dust-containing exhaust gas heat recovery device for recovering waste heat from high-dust-containing exhaust gas discharged from a soda recovery boiler and heating hot water to obtain hot water.
従来の技術 パルプ産業におけるパルプ工場の省エネルギー化を達
成するための一つの重要課題は、黒液回収ボイラーの廃
熱をいかに効率よく回収するかということである。2. Description of the Related Art One of the important issues to achieve energy saving of pulp mills in the pulp industry is how to efficiently recover the waste heat of the black liquor recovery boiler.
これまでに提案されている従来のソーダ回収ボイラ排
ガスの廃熱回収装置としては、実用新案公開昭和62年45
508号公報に示されるようなチューブ式の気−液熱交換
器を使用して、排ガスの廃熱によって清水を直接加熱し
て温水を得るよにしたものが多い。As a conventional waste heat recovery device for soda recovery boiler exhaust gas that has been proposed so far, a utility model was released in 1987 45
In many cases, a tube-type gas-liquid heat exchanger as shown in Japanese Patent No. 508 is used to obtain hot water by directly heating fresh water by waste heat of exhaust gas.
しかし、ソーダ回収ボイラの排ガス中には、HCl、S
OX、芒硝（Na2SO4）等が含まれているため、ソーダ回収
ボイラからの廃熱回収に上記のようなチューブ式の気−
液熱交換器を使用すると、廃熱回収の際に、熱交換器へ
のダスト付着が著しく、伝熱係数の低下が大きいため、
効率が悪くなる。However, in the exhaust gas of the soda recovery boiler, HCl, S
O X, mirabilite for (Na 2 SO 4) and the like are included, in the waste heat recovery from the soda recovery boiler tube type, such as the vapor -
When a liquid heat exchanger is used, dust is remarkably attached to the heat exchanger during waste heat recovery and the heat transfer coefficient is greatly reduced.
It becomes less efficient.
さらに、上記従来装置ではガス通路の閉塞や腐蝕によ
る伝熱板の損傷の問題が生じる上、腐蝕等により気−液
熱交換器がリークすると、清水が汚染されて温水として
利用できなくなり、さらには、この温水を利用している
他の設備にまで被害が及ぶ恐れがある。Furthermore, in the above-mentioned conventional device, there is a problem of damage of the heat transfer plate due to blockage of the gas passage or corrosion, and if the gas-liquid heat exchanger leaks due to corrosion or the like, fresh water is contaminated and cannot be used as hot water, and further. , Other facilities that use this hot water may be damaged.
さらに、この問題点を解決するために、気−液熱交換
器を耐蝕性のあるTi等の高価な材料で製作することは、
設備費を高くするので実用には向かなくなる。Further, in order to solve this problem, it is necessary to manufacture the gas-liquid heat exchanger with an expensive material such as Ti having corrosion resistance,
It is not suitable for practical use because it increases equipment costs.
考案が解決しようとする問題点 従って、本考案の目的は、上記のような従来の装置の
欠点のない高含じん排ガス廃熱回収装置を提供すること
にある。SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a high dust-containing exhaust gas waste heat recovery device which does not have the drawbacks of the conventional devices described above.
すなわち、本考案は高価な耐蝕性材料を用いない設備
費が安く、しかも、ダストの付着がなく且つ熱効率のよ
い非常に経済的且つ効率的な運転ができる高含じん排ガ
ス廃熱回収装置を提供する。That is, the present invention provides a high dust-containing exhaust gas waste heat recovery device that does not use expensive corrosion-resistant materials, has a low equipment cost, has no dust adhesion, and is highly economical and efficient with good thermal efficiency. To do.
さらに、本考案は耐蝕性が高く、得られた温水を使用
する他の機器への危険性が低い安全な高含じん排ガス廃
熱回収装置を提供する。Further, the present invention provides a safe high dust-containing exhaust gas waste heat recovery device having high corrosion resistance and low risk to other devices using the obtained hot water.
問題点を解決する手段 本考案の提供する高含じん排ガス廃熱回収装置は、高
含じん排ガスの煙道に設けられ、排ガスの廃熱を循環水
に回収する浮動プレート型熱交換器と、上記浮動プレー
ト型熱交換器で循環水に回収された廃熱により清水を加
熱する清水加熱用液−液熱交換器と、上記浮動プレート
型熱交換器と上記液−液熱交換器とを結び、両者の間に
上記浮動プレート型熱交換器で廃熱を回収し且つ回収し
た廃熱を上記清水加熱用液−液熱交換器へ運ぶ循環水を
循環させる循環管路と、上記清水加熱用液−液熱交換器
に冷清水を導入し、上記循環水との熱交換によって得ら
れた熱清水を取り出す給水管と、上記循環管路に設けら
れて循環水の流量を調節するための第１の流量調節手段
および／または上記給水管に設けられて上記冷清水の流
量を調節するための第２の流量調節手段とを備え、上記
第１および／または第２の流量調節手段により、上記浮
動プレート型熱交換器に入る上記循環水の入口温度を排
ガスの水露点以上に制御することを特徴としている。Means for Solving Problems A high dust-containing exhaust gas waste heat recovery device provided by the present invention is provided in a flue of a high dust containing exhaust gas, and a floating plate heat exchanger for recovering waste heat of exhaust gas into circulating water, A liquid-liquid heat exchanger for heating fresh water that heats fresh water by waste heat recovered in the circulating water by the floating plate heat exchanger, and connects the floating plate heat exchanger and the liquid-liquid heat exchanger. , A circulation pipe for collecting waste heat by the floating plate heat exchanger between the both, and circulating circulating water for carrying the collected waste heat to the fresh water heating liquid-liquid heat exchanger, and for the fresh water heating A liquid-liquid heat exchanger is provided with cold fresh water, a water supply pipe for taking out hot fresh water obtained by heat exchange with the circulating water, and a first pipe provided in the circulating pipe line for adjusting the flow rate of the circulating water. No. 1 flow control means and / or the above-mentioned water supply pipe is provided with the above-mentioned cold fresh water A second flow rate adjusting means for adjusting a flow rate, wherein the first and / or second flow rate adjusting means adjusts an inlet temperature of the circulating water entering the floating plate heat exchanger to a water dew point of exhaust gas. It is characterized in that it is controlled as described above.
循環媒体および冷清水の流量調節は、手動あるいは自
動制御で行うことができる。The flow rate of the circulating medium and the fresh water can be adjusted manually or automatically.
本考案は、上記の高含じん排ガスがソーダ回収ボイラ
から排出される高含じん排ガスである場合に特に好まし
く適用できるが、その他の排ガス、例えば、製鉄所等か
ら排出される排ガス等の全ての高含じん排ガスに適用す
ることができる。The present invention can be particularly preferably applied to the case where the above-mentioned high dust-containing exhaust gas is the high dust-containing exhaust gas discharged from the soda recovery boiler, but other exhaust gas, for example, all the exhaust gas discharged from steel mills, etc. It can be applied to high dust-containing exhaust gas.
上記の浮動プレート型熱交換器は、特許公表昭和59年
500580号公報あるいは実用新案公開昭和61年204189号明
細書等に記載された周知のものを利用することができ
る。この浮動プレート型熱交換器は、積層したプレート
間に流体の流路を形成しているもので、構造上、高濃度
のダストに対し、クリーニング性能がよい。The floating plate heat exchanger described above was patented in 1984.
It is possible to use a well-known one described in Japanese Patent No. 500580 or Utility Model Publication No. 204189, 1986. This floating plate heat exchanger has a fluid passage formed between the stacked plates, and has a good cleaning performance for high-density dust due to its structure.
上記浮動プレート型熱交換器の伝熱板すなわちプレー
トは、ほうろう引き鋼板であるのが好ましい。ほうろう
引き鋼板のプレートを用いることにより、耐蝕性、ダス
トの非付着性が極めて良好となる。また、ほうろう引き
鋼板は、従来のチューブ式気−液熱交換器に用いられて
いたTiあるいはNi基合金等の耐蝕性材料に比較して、は
るかに安価であり、低コストで長寿命の気−液熱交換器
を実現することができる。The heat transfer plate or plate of the floating plate heat exchanger is preferably an enameled steel plate. By using the plate made of enameled steel plate, the corrosion resistance and the non-adhesion property of dust become extremely good. In addition, enameled steel sheets are much cheaper than corrosion-resistant materials such as Ti or Ni-based alloys used in conventional tube-type gas-liquid heat exchangers, and are low cost and have a long life. A liquid heat exchanger can be realized.
また、上記浮動プレート型熱交換器に循環水を供給す
る際には、スプレーで供給することが好ましい。When supplying the circulating water to the floating plate heat exchanger, it is preferable to supply it by spraying.
作用 本考案の高含じん排ガス廃熱回収装置では、排ガスの
廃熱をまず循環水で回収し、この循環水を液−液熱交換
器に送り、この液−液熱交換器で清水を加熱して清浄な
工業用温水を得るようにしている。これは、以下の理由
からである。Function In the high-dust-containing exhaust gas waste heat recovery device of the present invention, the waste heat of exhaust gas is first recovered by circulating water, and this circulating water is sent to the liquid-liquid heat exchanger, where fresh water is heated by the liquid-liquid heat exchanger. To obtain clean industrial hot water. This is for the following reason.
まず第一に、浮動プレート型熱交換器を気−液熱交換
器に用いた場合には、ガスが液中に混入、溶け込みこと
が避け得られないため、工業用温水として不適当とな
る。本考案の装置では、循環水を浮動プレート型熱交換
器から液−液熱交換器に送り、この液−液熱交換器で清
水を加熱して清浄な工業用温水を得るようにしているの
で、万一浮動プレート型熱交換器がリークする事故が起
きた場合でも、循環水が汚染されるだけで済み、工業用
温水を供給している他の設備に直ちに影響が出ることが
ない。First of all, when a floating plate heat exchanger is used as a gas-liquid heat exchanger, it is unavoidable that gas is mixed in and dissolved in the liquid, which makes it unsuitable as hot water for industrial use. In the device of the present invention, circulating water is sent from the floating plate type heat exchanger to the liquid-liquid heat exchanger, and fresh water is heated by this liquid-liquid heat exchanger to obtain clean industrial hot water. In the unlikely event of a leak of the floating plate heat exchanger, the circulating water is only polluted and other facilities supplying industrial hot water are not affected immediately.
また、上記の液−液熱交換器は、循環水および清水が
流れるだけであるから、通常はそれほど腐蝕されず、従
来の装置に用いていた高価な耐蝕性材料を用いる必要も
ない。Further, since the liquid-liquid heat exchanger described above only circulates circulating water and fresh water, it is not usually corroded so much, and it is not necessary to use the expensive corrosion-resistant material used in the conventional apparatus.
本実施例では、排ガスと循環媒体との熱交換と循環媒
体と清水との熱交換との２つの熱交換を備え、さらに、
循環媒体および／または冷水の流量を調節するようにし
たため、浮動プレート型熱交換器の伝熱板温度を任意の
値、例えば、水露点以上に調節することが極めて容易且
つ正確にできる。In the present embodiment, two heat exchanges are provided, one for heat exchange between exhaust gas and the circulation medium and the other for heat exchange between the circulation medium and fresh water.
Since the flow rate of the circulating medium and / or the cold water is adjusted, it is extremely easy and accurate to adjust the heat transfer plate temperature of the floating plate heat exchanger to an arbitrary value, for example, the water dew point or higher.
すわなち、浮動プレート型熱交換器の伝熱板温度が水
露点以上であることが、ダストの付着防止に非常に有効
であり、伝熱板温度が水露点以上であるとダストの付着
は極めて減少する。そのために、熱交換器入口の水温を
水露点以上に保つ必要がある。電気集じん器の配置は、
浮動プレート型熱交換器の上流側に入れる場合と下流側
に入れる場合の両方があり、後者の場合は、浮動プレー
ト型熱交換器２の下流側に備えた電気集じん機（図示せ
ず）でのダスト回収効率に最適な排ガス温度にするのが
容易になる。一例として、浮動プレート型熱交換器２を
通過することにより排ガス温度を、200℃から150℃に低
下させることができ、排ガス流速も低下できるので、電
気集じん機（図示せず）でのダスト回収効率が向上す
る。That is, the fact that the temperature of the heat transfer plate of the floating plate heat exchanger is at or above the water dew point is very effective in preventing dust adhesion, and if the heat transfer plate temperature is at or above the water dew point, the adhesion of dust will occur. Extremely reduced. Therefore, it is necessary to keep the water temperature at the heat exchanger inlet above the water dew point. The arrangement of the electric dust collector is
There are both cases where the floating plate heat exchanger is placed upstream and downstream, and in the latter case, an electrostatic precipitator (not shown) provided downstream of the floating plate heat exchanger 2. It becomes easy to adjust the exhaust gas temperature to the optimum dust recovery efficiency. As an example, the exhaust gas temperature can be reduced from 200 ° C to 150 ° C by passing through the floating plate heat exchanger 2, and the exhaust gas flow velocity can also be reduced, so that dust in an electrostatic precipitator (not shown) can be reduced. Collection efficiency is improved.
また、前者の場合は浮動プレート型熱交換器に流入す
るダスト量が減少するため、ダスト除去が容易である特
徴を有する。Further, in the former case, since the amount of dust flowing into the floating plate heat exchanger is reduced, it is easy to remove dust.
一般的には、浮動プレート型熱交換器入り口の循環水
温度が水露点（約60℃）以上となるよう運転するのが好
ましい。この循環水温度の調節は、循環水および／また
は清水の流量を調節することにより制御することができ
る。Generally, it is preferable to operate so that the circulating water temperature at the inlet of the floating plate heat exchanger is at or above the water dew point (about 60 ° C). The adjustment of the circulating water temperature can be controlled by adjusting the flow rate of the circulating water and / or the fresh water.
以下、本考案を添付図面に示した実施例によりさらに
詳細に説明するが、以下の開示は本考案の一実施例にす
ぎず、本考案の技術的範囲を何等制限するものではな
い。Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the accompanying drawings, but the following disclosure is merely one embodiment of the present invention and does not limit the technical scope of the present invention.
実施例 第１図は、本考案を案高含じん排ガス廃熱回収装置に
適用した場合の一実施例におけるフローシートである。EXAMPLE FIG. 1 is a flow sheet of an example in which the present invention is applied to an exhaust gas waste heat recovery device of high dust content.
第１図に示す装置は、ソーダ回収用ボイラ煙道１中に
設けられた浮動プレート型熱交換器２を含んでいる。こ
の浮動プレート型熱交換器２はソーダ回収用ボイラ煙道
１中に導かれた排ガスと循環媒体、具体的には水等の液
体との間で熱交換を行う気−液の熱交換器である。この
浮動プレート型熱交換器２自体は周知のものであり、そ
の具体例は第２図を用いて後で説明する。The apparatus shown in FIG. 1 includes a floating plate heat exchanger 2 provided in a soda recovery boiler flue 1. This floating plate type heat exchanger 2 is a gas-liquid heat exchanger for exchanging heat between the exhaust gas introduced into the soda recovery boiler flue 1 and a circulating medium, specifically a liquid such as water. is there. The floating plate heat exchanger 2 itself is well known, and its specific example will be described later with reference to FIG.
上記排ガスと熱交換を行って昇温された循環媒体、例
えば水は上記浮動プレート型熱交換器２の下部に設けら
れた温水タンク５に回収された後、循環ポンプ７によっ
て循環管路６を介して清水との熱交換を行う清水加熱用
液−液熱交換器３に送られ、ここで熱を清水に与えて自
らは冷却される。冷却された循環媒体、例えば水は循環
管路６を介して上記浮動プレート型熱交換器２の上部に
設けられたスプレー給水装置４に再循環され、再び排ガ
スとの熱交換に用いられる。The circulating medium, which has been heated by exchanging heat with the exhaust gas, for example, water, is collected in the warm water tank 5 provided at the lower portion of the floating plate heat exchanger 2, and then the circulating pipe 6 is used to flow through the circulating pipe 6. It is sent to the liquid-liquid heat exchanger 3 for heating fresh water via which heat is exchanged with fresh water, where heat is given to the fresh water to cool itself. The cooled circulating medium, for example water, is recirculated to the spray water supply device 4 provided above the floating plate heat exchanger 2 via the circulation pipe 6 and used again for heat exchange with the exhaust gas.
第２図は、本実施例で使用したスプレー給水装置４お
よび温水タンク５を備えた浮動プレート型熱交換器２を
示している。この浮動プレート型熱交換器２は、細長い
ディンプルを有する複数の矩形プレートを積層し、被熱
交換流体を互いに直交する方向に流すことによって矩形
プレートを介して両被熱交換流体の間で熱交換を行うよ
うになっている。この構造の詳細は実用新案公開昭和61
年204189号明細書および特許公表昭和59年500580号公報
に詳細に示されているので、ここでは説明を省略する。FIG. 2 shows a floating plate heat exchanger 2 equipped with a spray water supply device 4 and a hot water tank 5 used in this embodiment. In this floating plate heat exchanger 2, a plurality of rectangular plates having elongated dimples are stacked, and the fluids to be heat exchanged are caused to flow in directions orthogonal to each other, whereby heat exchange is performed between the fluids to be heat exchanged via the rectangular plates. Is supposed to do. Details of this structure are published in Utility Model Showa 61
The detailed description is omitted here since it is described in detail in the specification of No. 204189 and the publication of patent No. 500580 of 1984.
いずれにせよ、この浮動プレート型熱交換器２では、
平板な矩形プレートすなわち伝熱板を積層することで流
体流路を形成し、しかも各伝熱板はいずれの流体の流れ
方向とも平行となっているので、排ガス中のダストが付
着し難い。In any case, in this floating plate heat exchanger 2,
Since fluid channels are formed by stacking flat rectangular plates, that is, heat transfer plates, and the heat transfer plates are parallel to the flow direction of any fluid, dust in the exhaust gas is unlikely to adhere.
本考案の好ましい実施例では、上記伝熱板にほうろう
引き鋼板が用いられる。このほうろう引き鋼板は、表面
が堅く、平滑で、はっ水性がよいのでダストが付着し難
く、また耐蝕性もよい。さらに、比較的安価であるので
本考案の装置に用いるのに特に適している。In a preferred embodiment of the present invention, an enameled steel plate is used as the heat transfer plate. This enameled steel plate has a hard surface, a smooth surface, and good water repellency, so that it is difficult for dust to adhere thereto, and has good corrosion resistance. Moreover, their relatively low cost makes them particularly suitable for use in the device of the present invention.
上記の循環媒体は一般に水が好ましいが、他の液体で
もよい。この循環水は、上記の浮動プレート型熱交換器
にスプレー給水をスプレー給水装置４によって給水する
のが好ましい。スプレー給水することにより、浮動プレ
ート型熱交換器内の温度むらが減少し、ダストの付着防
止に有効となるだけでなく、熱交換効率も向上する。Water is generally preferred as the circulating medium, but other liquids may be used. As for this circulating water, spray water is preferably supplied to the floating plate heat exchanger by the spray water supply device 4. By supplying water by spraying, temperature unevenness in the floating plate heat exchanger is reduced, which is effective not only for preventing dust from adhering but also for improving heat exchange efficiency.
上記循環管路６には循環水量を調節するための調節バ
ルブ８を設け、上記清水加熱用液−液熱交換器に冷水を
導入し、熱水を取り出す給水管９には清水給水ポンプ10
のほかに清水量調節バルブ11を設けるのが好ましい。こ
れらの循環水量調節バルブ８および／または清水量調整
バルブ11を制御することにより、循環水および清水の流
量を調整して、浮動プレート型熱交換器２の入り口での
循環水温度を所望の温度、例えば60℃以上にすることが
可能となる。これらのバルブ８、11は手動で制御しても
よいが、循環水と清水の温度、排ガスの温度と量とを検
出して、浮動プレート型熱交換器２の入り口での循環水
温度を自動的に最適値に制御するような自動制御機構に
よって制御してもよい。A control valve 8 for adjusting the amount of circulating water is provided in the circulation pipe 6, cold water is introduced into the fresh water heating liquid-liquid heat exchanger, and a fresh water feed pump 10 is provided in a water supply pipe 9 for taking out hot water.
In addition to the above, it is preferable to provide a fresh water amount control valve 11. By controlling the circulating water flow rate adjusting valve 8 and / or the fresh water flow rate adjusting valve 11, the flow rates of the circulating water and the fresh water are adjusted so that the circulating water temperature at the inlet of the floating plate heat exchanger 2 becomes a desired temperature. For example, it becomes possible to raise the temperature to 60 ° C. or higher. These valves 8 and 11 may be controlled manually, but the circulating water temperature at the inlet of the floating plate heat exchanger 2 is automatically detected by detecting the temperature of circulating water and fresh water and the temperature and amount of exhaust gas. It may be controlled by an automatic control mechanism that automatically controls to an optimum value.
以下、第１図に示す含じん排ガス廃熱回収装置の具体
的運転方法を説明する。Hereinafter, a specific operation method of the dust-containing exhaust gas waste heat recovery device shown in FIG. 1 will be described.
60℃以上の温度でスプレー給水装置４により浮動プレ
ート型熱交換器２に給水された循環水は、浮動プレート
型熱交換器２で約90℃まで加熱されて、温水タンク５で
回収される。その後、液−液熱交換器３で清水を加熱
し、循環管路６を経て、再び浮動プレート型熱交換器２
に再循環される。The circulating water supplied to the floating plate heat exchanger 2 by the spray water supply device 4 at a temperature of 60 ° C. or higher is heated to about 90 ° C. by the floating plate heat exchanger 2 and collected in the hot water tank 5. After that, fresh water is heated by the liquid-liquid heat exchanger 3, passes through the circulation pipe 6, and again the floating plate heat exchanger 2
Be recycled.
循環水量調節バルブ８および清水量調整バルブ11によ
り、循環水および清水の流量を調整し、浮動プレート型
熱交換器２入り口での循環水温度を60℃以上にする。一
方、排ガス温度は浮動プレート型熱交換器２を通過する
ことにより、200℃から150℃に低下し、排ガス流速も低
下する。The flow rates of the circulating water and the fresh water are adjusted by the circulating water amount adjusting valve 8 and the fresh water amount adjusting valve 11 so that the circulating water temperature at the inlet of the floating plate heat exchanger 2 is 60 ° C. or higher. On the other hand, the exhaust gas temperature decreases from 200 ° C. to 150 ° C. by passing through the floating plate heat exchanger 2, and the exhaust gas flow velocity also decreases.
考案の効果 以上説明したように、本考案の装置は、従来の装置と
異なり高価な耐蝕性材料を用いていないので、設備費が
低減される。また、本考案の上記運転方法によればダク
トの付着がなく且つ熱効率も高くなるので、ランニング
コストがさらに安くなり、非常に経済的且つ効率的な運
転ができる。Effect of the Invention As described above, the device of the present invention does not use an expensive corrosion-resistant material unlike the conventional device, so that the equipment cost is reduced. Further, according to the above operating method of the present invention, since the duct is not attached and the thermal efficiency is high, the running cost is further reduced and the operation can be very economical and efficient.
さらに、本考案によるほうろう引き鋼板を用いた浮動
プレート型熱交換器を用ることにより、耐蝕性が高く、
得られた温水を使用する他の機器への危険性が低く安全
な運転ができる。Furthermore, by using the floating plate type heat exchanger using the enameled steel plate according to the present invention, high corrosion resistance,
Safe operation is possible with less danger to other equipment using the obtained hot water.
第１図は、本考案による排ガス廃熱回収装置のフローシ
ートであり、第２図は、本考案の排ガス廃熱回収装置に
用いられる浮動プレート型熱交換器の一例を示す概念的
斜視図である。 〔主な参照番号〕 １……排ガス煙道、２……浮動プレート型熱交換器、３
……液−液熱交換器、４……スプレー給水装置、５……
温水タンク、６……循環管路、７……循環水ポンプ、８
……循環水量調節バルブ、９……清水給水管、10……清
水給水ポンプ、11……清水量調節バルブ、12……点検
口、13……補給水口FIG. 1 is a flow sheet of an exhaust gas waste heat recovery device according to the present invention, and FIG. 2 is a conceptual perspective view showing an example of a floating plate heat exchanger used in the exhaust gas waste heat recovery device of the present invention. is there. [Main reference numbers] 1 ... Exhaust gas flue, 2 ... Floating plate heat exchanger, 3
...... Liquid-liquid heat exchanger, 4 ...... Spray water supply device, 5 ......
Hot water tank, 6 ... Circulating pipeline, 7 ... Circulating water pump, 8
...... Circulating water volume control valve, 9 …… Clean water supply pipe, 10 …… Clean water supply pump, 11 …… Clean water volume control valve, 12 …… Inspection port, 13 …… Refill water port
───────────────────────────────────────────────────── フロントページの続き (72)考案者 佐藤 英男 岩手県北上市相去町字笹長音35番地 三菱 製紙株式会社北上工場内 (56)参考文献 特開 昭53−136743（ＪＰ，Ａ) 実開 昭61−204189（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideo Sato Inventor Hideo Sato 35 Sasa Nagane, Aizumi-cho, Kitakami City, Iwate Prefecture Kitakami Mill, Mitsubishi Paper Mills Co., Ltd. (56) Reference JP-A-53-136743 (JP, A) 61-204189 (JP, U)
Claims (3)
の廃熱を循環水に回収する浮動プレート型熱交換器と、 −上記浮動プレート型熱交換器で循環水に回収された廃
熱により清水を加熱する清水加熱用液−液熱交換器と、 −上記浮動プレート型熱交換器と上記液−液熱交換器と
を結び、両者の間に上記浮動プレート型熱交換器で廃熱
を回収し且つ回収した廃熱を上記清水加熱用液−液熱交
換器へ運ぶ循環水を循環させる循環管路と、 −上記清水加熱用液−液熱交換器に冷清水を導入し、上
記循環水との熱交換によって得られた熱清水を取り出す
給水管と、 −上記循環管路に設けられて循環水の流量を調節するた
めの第１の流量調節手段および／または上記給水管に設
けられて上記冷清水の流量を調節するための第２の流量
調節手段と を備え、上記第１および／または第２の流量調節手段に
より、上記浮動プレート型熱交換器に入る上記循環水の
入口温度を排ガスの水露点以上に制御することを特徴と
する高含じん排ガス廃熱回収装置。1. A floating plate type heat exchanger which is provided in a flue of a high-dust-containing exhaust gas and recovers waste heat of the exhaust gas into circulating water; and-waste recovered in the circulating water by the floating plate heat exchanger. A liquid-liquid heat exchanger for heating fresh water which heats fresh water by heat; -a floating plate type heat exchanger and a liquid-liquid heat exchanger, which are connected to each other by the floating plate type heat exchanger; A circulation pipe for circulating circulating water carrying heat to the fresh water heating liquid-liquid heat exchanger for recovering heat, and-introducing cold fresh water into the fresh water heating liquid-liquid heat exchanger, A water supply pipe for taking out hot and clean water obtained by heat exchange with the circulating water; and-a first flow rate adjusting means for adjusting the flow rate of the circulating water provided in the circulation pipe line and / or the water supply pipe. A second flow rate adjusting means provided to adjust the flow rate of the cold fresh water. The first and / or the second flow rate adjusting means controls the inlet temperature of the circulating water entering the floating plate heat exchanger to be equal to or higher than the water dew point of the exhaust gas. Heat recovery device.
ほうろう引き鋼板であることを特徴とする実用新案登録
請求の範囲第１項に記載の高含じん排ガス廃熱回収装
置。2. The heat transfer plate of the floating plate heat exchanger,
The high-dust-containing exhaust gas waste heat recovery device according to claim 1, characterized in that it is an enameled steel plate.
から排出される高含じん排ガスであることを特徴とする
実用新案登録請求の範囲第１項または第２項に記載の高
含じん排ガス廃熱回収装置。3. The high dust-containing exhaust gas according to claim 1 or 2, wherein the high dust-containing exhaust gas is a high dust-containing exhaust gas discharged from a soda recovery boiler. Waste heat recovery device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987187995U JPH081408Y2 (en) | 1987-12-10 | 1987-12-10 | High dust exhaust gas waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987187995U JPH081408Y2 (en) | 1987-12-10 | 1987-12-10 | High dust exhaust gas waste heat recovery system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0191840U JPH0191840U (en) | 1989-06-16 |
| JPH081408Y2 true JPH081408Y2 (en) | 1996-01-17 |
Family
ID=31479121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987187995U Expired - Lifetime JPH081408Y2 (en) | 1987-12-10 | 1987-12-10 | High dust exhaust gas waste heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH081408Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003048651A1 (en) * | 2001-12-03 | 2003-06-12 | The Tokyo Electric Power Company, Incorporated | Exhaust heat recovery system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53136743A (en) * | 1977-05-04 | 1978-11-29 | Nippon Kokan Kk <Nkk> | Heat collecting method of exhaust gas |
| JPS6044242B2 (en) * | 1982-04-27 | 1985-10-02 | 株式会社星子療科研究所 | How to generate oxygen in an emergency |
| JPS61204189U (en) * | 1985-06-10 | 1986-12-23 |
-
1987
- 1987-12-10 JP JP1987187995U patent/JPH081408Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003048651A1 (en) * | 2001-12-03 | 2003-06-12 | The Tokyo Electric Power Company, Incorporated | Exhaust heat recovery system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0191840U (en) | 1989-06-16 |
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