JPH09166315A - Exhaust gas cooling and exhaust heat recovery system - Google Patents
Exhaust gas cooling and exhaust heat recovery systemInfo
- Publication number
- JPH09166315A JPH09166315A JP7347437A JP34743795A JPH09166315A JP H09166315 A JPH09166315 A JP H09166315A JP 7347437 A JP7347437 A JP 7347437A JP 34743795 A JP34743795 A JP 34743795A JP H09166315 A JPH09166315 A JP H09166315A
- Authority
- JP
- Japan
- Prior art keywords
- water
- exhaust gas
- flue
- temperature
- exhaust
- 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.)
- Pending
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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
- Separation Of Particles Using Liquids (AREA)
Abstract
(57)【要約】
【課題】 排ガス中の水分を霧状低温水の撒布により捕
捉し、排ガス温度を降下させることにより、排ガスの露
点を降下させて外気に放出せしめ、低煙突化又は煙突レ
ス化を図るとともに、撒布水の熱を有効に利用しうる排
煙の冷却，排熱回収システムを提供することにある。
【解決手段】 煙道（１）内を流れる排ガスに霧状低温
水をノズル（２ａ）〜（２ｄ）より撒布接触させ、排ガ
ス中に含まれる水分及びダストを捕捉して排ガス温度を
降下させることにより、排ガスの露点を降下させて外気
に放出せしめ、一方、捕捉されたダストを含む水分及び
撒布水を煙道（１）に設けた集水ピット（３ａ）〜（３
ｄ）に回収し、この集水ピット（３ａ）〜（３ｄ）内の
捕捉水の熱を適宜手段で回収しながらＰＨ調整タンク
（８）に導き、このＰＨ調整タンク（８）内の水を再び
煙道（１）内に循環撒布するとともに、余剰水の一部を
工水として回収又は放棄することを特徴とする。
(57) [Abstract] [PROBLEMS] Moisture in exhaust gas is captured by spraying mist-like low-temperature water, and the exhaust gas temperature is lowered to lower the dew point of the exhaust gas and release it to the outside air, thereby reducing the stack or stack. It is intended to provide a cooling system for exhaust gas and an exhaust heat recovery system that can effectively utilize the heat of the spray water. SOLUTION: Mist-like low-temperature water is sprinkled and contacted with exhaust gas flowing in a flue (1) through nozzles (2a) to (2d) to capture moisture and dust contained in the exhaust gas to lower the exhaust gas temperature. Thus, the dew point of the exhaust gas is lowered to be released to the outside air, while the moisture and the sprayed water containing the captured dust are provided in the flue (1) in the water collecting pits (3a) to (3).
d), and while guiding the heat of the captured water in the water collecting pits (3a) to (3d) by an appropriate means to the PH adjusting tank (8), the water in the PH adjusting tank (8) is collected. It is characterized in that it is sprayed again in the flue (1) and part of the surplus water is collected or discarded as industrial water.
Description
【０００１】[0001]
【発明の属する技術分野】 本発明は、排煙の冷却，排
熱回収システムの改善に関する。TECHNICAL FIELD The present invention relates to an improvement of a flue gas cooling and exhaust heat recovery system.
【０００２】[0002]
【従来技術とその課題】 例えば、発電所設備などのプ
ラントにおいて、石油，石炭，ＬＮＧなどを燃料とする
ボイラからの排ガスは、脱硝，脱硫，集塵を行って煙突
から排出する。その間排熱回収の手続として空気予熱器
などで排熱を回収するが、エネルギー利用効率の高い発
電所設備でさえも、煙突から排出される排ガス温度は９
５〜１２０℃と高温である。このように煙突から排出さ
れる高温排ガスは不飽和ながら水分を含んでおり、これ
が大気中に排出されると凝縮して多量の白煙の発生を来
す。この多量の白煙の発生現象は景観破壊など地元住民
の苦情の要因となることから、煙突を１５０〜２００ｍ
のように高くし、高温排ガスを高所に放出するようにし
ている。一方、煙突を高くすることは地域の景観を損な
うので、近年景観対策として意匠性の高い凝装構造物で
煙突を囲う例が多いが、何れもコスト高で余分な費用が
不必要に嵩むという設計的，経済的な不都合が認められ
る。2. Description of the Related Art For example, in a plant such as a power plant, exhaust gas from a boiler that uses petroleum, coal, LNG or the like as fuel is subjected to denitration, desulfurization and dust collection, and then discharged from a chimney. During that time, exhaust heat is recovered by an air preheater as a procedure for recovering exhaust heat, but even in power plant facilities with high energy utilization efficiency, the exhaust gas temperature emitted from the chimney is 9
It is a high temperature of 5 to 120 ° C. As described above, the high temperature exhaust gas discharged from the chimney contains water while being unsaturated, and when it is discharged into the atmosphere, it is condensed and a large amount of white smoke is generated. This large amount of white smoke is a cause of local residents' complaints such as landscape destruction.
The high temperature exhaust gas is emitted to a high place. On the other hand, increasing the height of the chimney impairs the landscape of the area, so in recent years there are many cases where the chimney is surrounded by a highly-constructed cohesive structure as a landscape measure, but in both cases, the cost is high and extra costs are unnecessarily increased. Design and financial inconveniences are recognized.
【０００３】前述のような課題の解消策として、例えば
特開昭５４−７６７１６号公報に示されるように排ガス
エネルギーの回収装置が提案されている。この装置は図
１１に示すように、ポンプ１１，ディーゼル機関１２の
排気管１３に設けた排ガスエネルギー回収の熱交換器１
４，熱エネルギー取出用の熱交換器１５などより構成さ
れる簡単な閉ループを設けて、排ガスからエネルギーを
除いて排ガスを冷却するようにしたものであるが、閉ル
ープの冷媒はこうした形態では常温以上の温度にならざ
るを得ず、従って排ガス温度は常温に対してかなり高
く、水分除去も十分でない。As a solution to the above-mentioned problem, for example, an exhaust gas energy recovery apparatus has been proposed as disclosed in Japanese Patent Application Laid-Open No. 54-76716. As shown in FIG. 11, a heat exchanger 1 for recovering exhaust gas energy provided in a pump 11 and an exhaust pipe 13 of a diesel engine 12 as shown in FIG.
4, a simple closed loop including a heat exchanger 15 for extracting thermal energy is provided to remove the energy from the exhaust gas and cool the exhaust gas. Therefore, the exhaust gas temperature is considerably higher than normal temperature, and the water removal is not sufficient.
【０００４】本発明の目的は、排ガス中の水分を霧状低
温水の撒布により捕捉し、排ガス温度を降下させ、併せ
て排ガス湿度を２０℃飽和蒸気以上に保持して放出せし
め、低煙突化又は煙突レス化を図るとともに、撒布水の
熱を有効に利用しうる排煙の冷却，排熱回収システムを
提供することにある。The object of the present invention is to capture water in exhaust gas by spraying mist-like low-temperature water, lower the temperature of exhaust gas, and at the same time, maintain exhaust gas humidity at 20 ° C. or higher saturated steam to release it, thereby reducing the stack. Another object of the present invention is to provide a flue gas cooling / exhaust heat recovery system that can effectively use the heat of the spray water while eliminating the chimney.
【０００５】[0005]
【課題を解決するための手段】 上記目的は、煙道内を
流れる排ガスに霧状低温水を撒布接触させ、排ガス中に
含まれる水分及びダストを捕捉して排ガス温度を降下さ
せることにより、排ガスの露点を降下させて外気に放出
せしめ、一方、捕捉されたダストを含む水分及び撒布水
を煙道に設けた集水ピットに回収し、この集水ピット内
の捕捉水の熱を適宜手段で回収しながらＰＨ調整タンク
に導き、このＰＨ調整タンク内の水を再び煙道内に循環
撒布するとともに、余剰水の一部を工水として回収又は
放棄することによって達成される。上記目的は、請求項
１において、煙道内に、排ガスの流れに沿って霧状低温
水の撒布手段を複数基段階的に配設し、この各撒布手段
に対応して複数の集水ピットを設け、排ガスの水分が温
度別に回収しうるようにしたことにより達成される。上
記目的は、請求項１又は２において、集水ピットとＰＨ
調整タンクとを結ぶ管路に、熱エネルギー回収のエコノ
マイザーを設けたことによって達成される。上記目的
は、請求項１，２又は３において、集水ピットとＰＨ調
整タンクとを結ぶ管路に、海水を利用した熱交換器を設
けたことによって達成される。上記目的は、煙道内に流
れる排ガスに、ＬＮＧなどの極低温液化ガスにて冷却さ
れるプロパノールなどの中間媒体による熱交換器にて低
温化された霧状の水を撒布させ、排ガス中に含まれる水
分及びダストを捕捉して排ガス温度を降下させることに
より、排ガスの露点を降下して外気に放出せしめ、一
方、捕捉されたダストを含む水分及び撒布水を煙道に設
けた集水ピットに回収し、この集水ピット内の捕捉水の
熱を適宜手段で回収しながら、ＰＨ調整タンクを介し、
前記中間媒体を用いた熱交換器にて再低温化して再び煙
道内に循環撒布するとともに、ＰＨ調整タンクから捕捉
水の一部を工水として回収又は放棄することによって達
成される。上記目的は、請求項５において、低温水の撒
布手段と中間媒体を用いた熱交換器を結ぶ管路に、撒布
水のプールタンクを設けたことによって達成される。上
記目的は、請求項５又は６において、煙道を流れる排ガ
スの流れに沿って霧状低温水の撒布手段を複数基段階的
に配設し、この各撒水手段に対応して複数の集水ピット
を設け、排ガス中の水分が温度別に回収しうるようにし
たことによって達成される。上記目的は、請求項５，
６，又は７において、集水ピットとＰＨ調整タンクを結
ぶ管路に、熱エネルギー回収のエコノマイザーを設けた
ことによって達成される。上記目的は、請求項５，６，
７又は８において、集水ピットとＰＨ調整タンクを結ぶ
管路に、海水を利用した熱交換器を設けたことによって
達成される。上記目的は、煙道内を流れる排ガスに霧状
海水を撒布接触させ、排ガス中に含まれる水分及びダス
トを捕捉して排ガス温度を降下させることにより、排ガ
スの露点を降下させて外気に放出せしめ、一方、捕捉さ
れたダストを含む水分及び撒布海水を煙道に設けた集水
ピットに回収し、この集水ピット内の捕捉水の適宜手段
で回収しながらＰＨ調整タンクに導き、このＰＨ調整タ
ンク内の水を海域に放棄することによって達成される。
上記目的は、請求項１０において、煙道内に、排ガスの
流れに沿って霧状海水の撒布手段を複数基段階的に配設
し、この撒布手段に対応して複数の集水ピットを設け、
排ガス中の水分が温度別に回収しうるようにしたことに
よって達成される。上記目的は、請求項１０又は１１に
おいて、集水ピットとＰＨ調整タンクを結ぶ管路に、熱
エネルギー回収のエコノマイザーを設けたことによって
達成される。Means for Solving the Problems The above-mentioned object is to spray mist low-temperature water on exhaust gas flowing in a flue to contact it, and to capture the moisture and dust contained in the exhaust gas to lower the exhaust gas temperature. The dew point is lowered to release it to the outside air, while the moisture and the sprayed water containing the captured dust are collected in the water collecting pit provided in the flue, and the heat of the water captured in this water collecting pit is collected by an appropriate means. However, it is achieved by guiding the water to the pH adjusting tank, circulating the water in the pH adjusting tank again in the flue, and collecting or discarding a part of the surplus water as industrial water. According to the first aspect of the present invention, a plurality of spraying means for spraying mist-like low-temperature water are provided stepwise in the flue along the flow of the exhaust gas, and a plurality of water collecting pits are provided corresponding to the spraying means. This is achieved by providing the exhaust gas so that the water content of the exhaust gas can be recovered for each temperature. The above-mentioned purpose is the water collecting pit and PH in claim 1 or 2.
This is achieved by providing an economizer for recovering heat energy in the pipe connecting the adjustment tank. The above object is achieved by providing a heat exchanger using seawater in a pipe line connecting the water collecting pit and the pH adjusting tank. The purpose of the above is to spray the exhaust gas flowing in the flue with mist-like water whose temperature has been lowered by a heat exchanger using an intermediate medium such as propanol cooled with a cryogenic liquefied gas such as LNG, and to include it in the exhaust gas. By capturing the moisture and dust captured and lowering the exhaust gas temperature, the dew point of the exhaust gas is lowered and released to the outside air, while the moisture and spray water containing the captured dust is collected in the water collecting pit provided in the flue. While collecting and collecting the heat of the captured water in this water collecting pit by an appropriate means, through the PH adjusting tank,
This is achieved by recooling the temperature in a heat exchanger using the intermediate medium, circulating and spraying it again in the flue, and collecting or discarding a part of the trapped water as industrial water from the PH adjustment tank. The above object is achieved by providing a pool tank for spray water in a pipe line connecting a spray means for low temperature water and a heat exchanger using an intermediate medium in claim 5. According to the fifth or sixth aspect, a plurality of spraying means for spraying atomized low-temperature water are arranged stepwise along the flow of the exhaust gas flowing through the flue, and a plurality of water collecting means are provided corresponding to each spraying means. This is achieved by providing a pit so that water in the exhaust gas can be recovered for each temperature. The above-mentioned object is claim 5,
In 6 or 7, it is achieved by providing a heat energy recovery economizer in the pipe line connecting the water collection pit and the PH adjustment tank. The above-mentioned object is to claim 5, 6,
In 7 or 8, it is achieved by providing a heat exchanger using seawater in the pipe line connecting the water collection pit and the PH adjustment tank. The above-mentioned purpose is to spray the atomized seawater to the exhaust gas flowing in the flue, and to capture the moisture and dust contained in the exhaust gas to lower the exhaust gas temperature, thereby lowering the dew point of the exhaust gas and releasing it to the outside air, On the other hand, the water containing the captured dust and the sprinkling seawater are collected in a water collecting pit provided in the flue, and the collected water in the water collecting pit is guided to a PH adjusting tank while being collected by an appropriate means. It is achieved by abandoning the water in the sea.
The above-mentioned object is, in claim 10, in the flue, a plurality of spraying means of mist-like seawater are arranged stepwise along the flow of the exhaust gas, and a plurality of water collecting pits are provided corresponding to the spraying means.
This is achieved by making it possible to recover the water content in the exhaust gas depending on the temperature. The above object is achieved by providing an economizer for recovering heat energy in a pipe line connecting the water collecting pit and the pH adjusting tank.
【０００６】[0006]
【発明の実施の形態】 図面について本発明実施例の詳
細を説明する。図１は本発明第１実施例の説明図、図２
は本発明第２実施例の説明図、図３は本発明第３実施例
の説明図である。Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view of the first embodiment of the present invention, FIG.
Is an illustration of the second embodiment of the present invention, and FIG. 3 is an illustration of the third embodiment of the present invention.
【０００７】従来の排ガス条件例として発電所の排ガス
を引用すると、ダクト又は配管などの煙道を通過し煙突
から大気中に放出される排ガスは、既に集塵，脱硝，脱
硫がなされており、クリーン度は高いが排ガス温度は９
５〜１２０℃といまだに高温であり、水蒸気量はかなり
高い。即ち、水蒸気は排ガス温度で相対湿度が高くはな
いにしても、４０℃，５０℃で飽和する程度であり、
夏，冬を問わず地上に１５０〜２００ｍの高さの煙突か
ら大気に放出すると、水蒸気は凝縮して大量の白煙をも
たらす。When the exhaust gas from a power plant is cited as an example of conventional exhaust gas conditions, the exhaust gas that passes through a flue such as a duct or a pipe and is discharged into the atmosphere from a chimney has already undergone dust collection, denitration, and desulfurization. Cleanliness is high, but exhaust gas temperature is 9
The temperature is still high at 5 to 120 ° C, and the amount of water vapor is quite high. That is, water vapor is saturated at 40 ° C. and 50 ° C. even if the relative humidity at exhaust gas temperature is not high,
When it is released into the atmosphere from a chimney with a height of 150 to 200 m above the ground regardless of summer or winter, the water vapor condenses and produces a large amount of white smoke.
【０００８】図１について本発明第１実施例を説明す
る。１は、既に集塵，脱硝，脱硫処理された９５〜１２
０℃といまだ高温の排ガスが流れる煙道で、該煙道１内
の上部には、排ガスの流れに沿って低温水を下向き，上
向き、又は横向きに噴霧するノズル２ａ〜２ｄが配設さ
れている。前記煙道１の下辺には、前記ノズル２ａ〜２
ｄに対応し、かつ煙道壁面を凹状とした集水ピット３ａ
〜３ｄを形成するとともに、この集水ピット３ａ〜３ｄ
の上辺に煙道１の通常壁面と一致する多孔板４を張設
し、排ガスの流れに乱れが生じないようにしてある。前
記各集水ピット３ａ〜３ｄに接続した各管路５ａ〜５ｄ
には、上流側から下流側に向けてポンプＰ1〜Ｐ4，バル
ブＶ1〜Ｖ4，熱エネルギー回収エコノマイザー６ａ〜６
ｃ及び／又は海水等の低温ヒートシンクへの放熱用熱交
換器７ａ〜７ｄを順に設けるとともに、各管路５ａ〜５
ｄの下流端を異物除去手段（図示略）を設けたＰＨ調整
タンク８に接続する。又ＰＨ調整タンク８の下部に接続
した循環管路９を、ポンプＰ5及び必要に応じ海水を用
いた熱交換器７ｅを介して前記各ノズル２ａ〜２ｄに接
続し、除塵しＰＨ調整された低温水が各ノズル２ａ〜２
ｄに供給されるようにしたものである。図中Ｖ5〜Ｖ8は
撒布水量調整用のバルブ、１０は、煙道１の上流側に必
要に応じて配設される排ガスのドラフト補助用のファ
ン、１１は水滴除去のデミスターである。前記ＰＨ調整
タンク８に水位検知手段１２を設け、この水位検知手段
１２のレベル検出信号により管路１３に設けたバルブＶ
9をオン・オフさせ、余剰水を回収又は放流する。又集
水ピット３ｂ，３ｃに接続せる管路５ｂ，５ｃの上流端
をポンプＰ6，Ｐ7を介して集水ピット３ａに接続し、集
水ピット３ｂ内の捕捉水を集水ピット３ａに送り、捕捉
水の温度が調整しうるようにしたものである。尚、前記
海水を利用した熱交換器７ａ〜７ｄの代わりにクーリン
グタワーを使用してもよい。A first embodiment of the present invention will be described with reference to FIG. No. 1 is 95 to 12 which has already been subjected to dust collection, denitration and desulfurization treatment.
It is a flue where the exhaust gas still at a high temperature of 0 ° C. flows, and nozzles 2a to 2d for spraying the low temperature water downward, upward or sideways along the flow of the exhaust gas are arranged in the upper part of the flue 1. There is. On the lower side of the flue 1, the nozzles 2a-2
Water collection pit 3a corresponding to d and with a concave flue wall surface
~ 3d are formed and the water collecting pits 3a to 3d are formed.
A perforated plate 4 which is aligned with the normal wall surface of the flue 1 is stretched on the upper side of the flue 1 so that turbulence does not occur in the flow of exhaust gas. Pipe lines 5a to 5d connected to the water collecting pits 3a to 3d
The pumps P 1 to P 4 , valves V 1 to V 4 , and thermal energy recovery economizers 6 a to 6 from the upstream side to the downstream side.
c and / or heat-dissipating heat exchangers 7a to 7d for low-temperature heat sinks such as seawater are provided in order, and the respective pipelines 5a to 5 are provided.
The downstream end of d is connected to the PH adjustment tank 8 provided with foreign matter removing means (not shown). Further, a circulation line 9 connected to the lower portion of the PH adjusting tank 8 was connected to each of the nozzles 2a to 2d via a pump P 5 and a heat exchanger 7e using seawater as needed, and dust was removed to adjust the pH. Low temperature water is used for each nozzle 2a-2
It is adapted to be supplied to d. In the figure, V 5 to V 8 are valves for adjusting the amount of sprayed water, 10 is a fan for draft assistance of exhaust gas, which is arranged as necessary on the upstream side of the flue 1, and 11 is a demister for removing water droplets. A water level detecting means 12 is provided in the pH adjusting tank 8, and a valve V provided in the pipe line 13 according to a level detection signal of the water level detecting means 12.
Turn 9 ON / OFF to collect or discharge excess water. In addition, the upstream ends of the pipes 5b and 5c that can be connected to the water collecting pits 3b and 3c are connected to the water collecting pit 3a via pumps P 6 and P 7 , and the water captured in the water collecting pit 3b is collected in the water collecting pit 3a. The temperature of the sent and captured water can be adjusted. A cooling tower may be used instead of the heat exchangers 7a to 7d using seawater.
【０００９】[0009]
【作用の説明】 上記第１実施例について、排ガスの冷
却，排熱回収作用を説明する。煙道１内を流れる排ガス
に各ノズル２ａ〜２ｄから噴霧される低温水を撒布接触
させ、この霧状低温水により排ガス中に含まれる水分及
びダストを捕捉するとともに、排ガス温度を降下させ
る。そして、排ガス湿度を例えば２５℃飽和蒸気にした
状態で煙突（図示略）より放出せしめる。一方、霧状低
温水の撒布により捕捉されたダストを含む水分は、多孔
板４を通して集水ピット３ａ〜３ｄ内に回収される。ち
なみに、集水ピット３ａに回収された撒布水の温度は例
えば、約８０℃であり、又集水ピット３ｂ内には約６０
℃、集水ピット３ｃ内には約４０℃、集水ピット３ｄ内
には約２５℃の撒布水が回収される。各集水ピット３ａ
〜３ｄ内に回収された撒布水の排熱は、管路５ａ〜５ｃ
に設けた熱エネルギー回収のエコノマイザー６ａ〜６ｃ
及び／又は管路５ａ〜５ｄに設けた海水を利用した熱交
換器７ａ〜７ｄにより回収されながらＰＨ調整タンク８
内に低温水として蓄えられる。該ＰＨ調整タンク８内に
導かれた低温水は異物除去手段（図示略）により除塵さ
れ、再びノズル２ａ〜２ｄに循環し撒布せしめられる。
そして、ＰＨ調整タンク８内の余剰水は前述のように工
水として回収又は放棄される。[Explanation of Action] Regarding the first embodiment, the action of cooling exhaust gas and recovering exhaust heat will be described. The exhaust gas flowing in the flue 1 is sprinkled with the low temperature water sprayed from the nozzles 2a to 2d, and the atomized low temperature water captures moisture and dust contained in the exhaust gas and lowers the exhaust gas temperature. Then, the exhaust gas is discharged from a chimney (not shown) in a state where the exhaust gas humidity is, for example, 25 ° C. saturated steam. On the other hand, the water content including dust captured by the spray of mist-type low temperature water is collected through the porous plate 4 into the water collecting pits 3a to 3d. By the way, the temperature of the spray water collected in the water collecting pit 3a is, for example, about 80 ° C., and the temperature of the spray water in the water collecting pit 3b is about 60 ° C.
Spray water of about 40 ° C. is collected in the water collecting pit 3 c and about 25 ° C. in the water collecting pit 3 d. Each water collecting pit 3a
Waste heat of the sprinkling water collected in ~ 3d, the pipe lines 5a ~ 5c
Energy recovery economizers 6a to 6c installed in
And / or the pH adjusting tank 8 while being recovered by the heat exchangers 7a to 7d using seawater provided in the pipelines 5a to 5d.
It is stored as low temperature water inside. The low-temperature water introduced into the pH adjusting tank 8 is dust-removed by a foreign matter removing means (not shown), and is circulated and sprayed again on the nozzles 2a to 2d.
Then, the surplus water in the pH adjusting tank 8 is collected or abandoned as industrial water as described above.
【００１０】図２について、本発明第２実施例の詳細を
説明する。２１は、既に集塵，脱硝，脱硫処理された９
５〜１２０℃といまだ高温の排ガスが流れる煙道で、該
煙道２１内の上部には、排ガスの流れに沿って複数基の
低温水を下向き，上向き又は横向きに噴霧するノズル２
２ａ〜２２ｃが配設されている。又前記煙道２１の下辺
には、前記ノズル２２ａ〜２２ｃに対応し、かつ煙道壁
面を凹状とした集水ピット２３ａ〜２３ｃを形成すると
ともに、この集水ピット２３ａ〜２３ｃの上辺に煙道２
１の通常壁面と一致する多孔板２４を張設し、排ガスの
流れに乱れが生じないように構成してある。前記各集水
ピット２３ａ〜２３ｃに接続した各管路２５ａ〜２５ｃ
には、上流側から下流側に向けてポンプＰ11〜Ｐ33，バ
ルブＶ11〜Ｖ33を設けるとともに、各管路２５ａ〜２５
ｃの下流端を異物除去手段（図示略）をもつＰＨ調整タ
ンク２６に接続する。又前記管路２５ａ，２５ｂには熱
エネルギー回収のエコノマイザー２７ａ，２７ｂ及び／
又は海水を利用した熱交換器２８ａ，２８ｂを設けると
ともに、前記管路２５ｃに前記同様の熱交換器２８ｃを
設ける。一方、約−１６２℃で凝固せず、約２０℃でガ
ス化しないプロパノールなどの中間媒体を容れたタンク
２９の一側に、ＬＮＧなどの極低温液化ガスの管路３０
を挿通するとともに、一端をプールタンク３１に接続し
た冷却水の管路３２を挿通し、ＬＮＧ→プロパノール→
水の順で冷却される熱交換器３３を設け、前記プールタ
ンク３１の下端部に接続された循環管路３４をポンプＰ
44を介して前記各ノズル２２ａ〜２２ｃに接続するとと
もに、前記ＰＨ調整タンク２６の下部と前記管路３２を
ポンプＰ55を介して接続し、集水ピット２３ａ〜２３ｃ
に回収された撒布水が、管路２５ａ〜２５ｃ→ＰＨ調整
タンク２６→熱交換器３３→０℃〜３０℃に冷却された
水のプールタンク３１→ノズル２２ａ〜２２ｃ→噴霧→
集水ピット２３ａ〜２３ｃのように循環されるようにし
たものである。図中Ｖ44〜Ｖ66は撒布水量調整用のバル
ブ、３５は、煙道２１の上流側に必要に応じて配設され
る排ガスのドラフト補助用のファン，３６は水滴除去の
デミスターである。前記プールタンク３１に水位検知手
段３７を設け、この水位検知手段３７のレベル検出信号
により管路３８に設けたバルブＶ77をオン・オフさせ、
余剰水を回収又は放流する。又前記集水ピット２３ｂに
接続せる管路２５ｂの上流端をポンプＰ66を介して集水
ピット２３ａに接続し、集水ピット２３ｂ内の捕捉水を
集水ピット２３ａに送り、捕捉水の温度が調整しうるよ
うにしたものである。尚、前記海水を利用した熱交換器
２８ａ〜２８ｃの代わりにクーリングタワーを使用して
もよい。The second embodiment of the present invention will be described in detail with reference to FIG. No. 21 has already been subjected to dust collection, denitration and desulfurization treatment 9
It is a flue channel through which exhaust gas having a still high temperature of 5 to 120 ° C. flows, and a nozzle 2 for spraying a plurality of low-temperature water downward, upward or sideways along the flow of the exhaust gas in the upper part of the flue 21.
2a to 22c are provided. Further, water collecting pits 23a to 23c corresponding to the nozzles 22a to 22c and having a concave flue wall surface are formed on the lower side of the flue 21, and the flue is formed on the upper side of the water collecting pits 23a to 23c. Two
A perforated plate 24 that matches the normal wall surface of No. 1 is stretched so that the flow of exhaust gas is not disturbed. Pipe lines 25a to 25c connected to the water collecting pits 23a to 23c
Is provided with pumps P 11 to P 33 and valves V 11 to V 33 from the upstream side to the downstream side, and each of the pipelines 25 a to 25
The downstream end of c is connected to a pH adjusting tank 26 having foreign matter removing means (not shown). Further, economizers 27a, 27b for collecting heat energy and / or the pipe lines 25a, 25b are provided.
Alternatively, the heat exchangers 28a and 28b using seawater are provided, and the pipe 25c is provided with the same heat exchanger 28c as described above. On the other hand, at one side of a tank 29 containing an intermediate medium such as propanol which does not solidify at about -162 ° C and does not gasify at about 20 ° C, a pipe line 30 for cryogenic liquefied gas such as LNG is provided.
And a pipe 32 for cooling water, one end of which is connected to the pool tank 31, and LNG → propanol →
A heat exchanger 33 for cooling water in order is provided, and a circulation pipe 34 connected to the lower end of the pool tank 31 is connected to a pump P.
44 is connected to each of the nozzles 22a to 22c via 44, and the lower portion of the pH adjusting tank 26 and the pipe 32 are connected via a pump P 55 to collect water from the water collecting pits 23a to 23c.
The sprinkling water collected in the pipe lines 25a to 25c → PH adjusting tank 26 → heat exchanger 33 → pool tank 31 of water cooled to 0 ° C to 30 ° C → nozzles 22a to 22c → spraying →
The water collecting pits 23a to 23c are circulated. In the figure, V 44 to V 66 are valves for adjusting the amount of sprayed water, 35 is a fan for draft assistance of exhaust gas, which is arranged as necessary on the upstream side of the flue 21, and 36 is a demister for removing water droplets. The pool tank 31 is provided with a water level detecting means 37, and a valve V 77 provided in the pipe 38 is turned on / off by a level detection signal of the water level detecting means 37,
Collect or discharge excess water. Further, the upstream end of the pipe line 25b which can be connected to the water collecting pit 23b is connected to the water collecting pit 23a via the pump P 66, and the trapped water in the water collecting pit 23b is sent to the water collecting pit 23a, so that the temperature of the trapped water is increased. Is adjustable. A cooling tower may be used instead of the heat exchangers 28a to 28c using seawater.
【００１１】[0011]
【作用の説明】 上記第２実施例について、排ガスの冷
却，水回収作用，排熱回収作用を説明する。煙道２１内
を流れる排ガスに、熱交換器３３にて０℃〜３０℃に冷
却された低温水を各ノズル２２ａ〜２２ｃから噴霧接触
させ、この霧状低温水により排ガス中に含まれる水分及
びダストを捕捉するとともに、排ガス温度を降下せし
め、排ガスの露点を降下させて外気に放出する。一方、
霧状低温水の撒布により捕捉されたダストを含む水分
は、多孔板２４を通じて集水ピット２３ａ〜２３ｃ内に
回収される。各集水ピット２３ａ〜２３ｂ内に回収され
た撒布水の排熱は、管路２５ａ，２５ｂに設けた熱エネ
ルギー回収のエコノマイザー２７ａ，２７ｂ及び／又は
各管路２５ａ〜２５ｃに設けた海水を利用した熱交換器
２８ａ〜２８ｃにより回収されながらＰＨ調整タンク２
６内に低温水として蓄えられる。このＰＨ調整タンク２
６内に導かれた低温水は異物除去手段により除塵され、
再び熱交換器３３で０℃〜３０℃に低温化されてノズル
２２ａ〜２２ｃに循環し撒布せしめられる。プールタン
ク３１内に回収された余剰水は、前述のように工水とし
て回収又は管路３８より放棄される。[Explanation of Action] Regarding the second embodiment, the action of cooling exhaust gas, recovering water, and recovering exhaust heat will be described. Low-temperature water cooled to 0 ° C. to 30 ° C. in the heat exchanger 33 is brought into spray contact with the exhaust gas flowing in the flue 21 from the nozzles 22a to 22c, and the water contained in the exhaust gas due to the atomized low-temperature water and While trapping dust, it lowers the temperature of the exhaust gas, lowers the dew point of the exhaust gas, and releases it to the atmosphere. on the other hand,
Moisture containing dust captured by the spray of mist-type low temperature water is collected through the perforated plate 24 into the water collecting pits 23a to 23c. The exhaust heat of the sprayed water collected in each of the water collecting pits 23a to 23b is the heat energy recovery economizers 27a and 27b provided in the pipelines 25a and 25b and / or the seawater provided in the pipelines 25a to 25c. The pH adjustment tank 2 while being recovered by the used heat exchangers 28a to 28c.
Stored in 6 as cold water. This PH adjustment tank 2
The low temperature water introduced into 6 is removed by the foreign matter removing means,
The temperature is again lowered to 0 ° C. to 30 ° C. by the heat exchanger 33 and circulated through the nozzles 22a to 22c and sprinkled. The surplus water collected in the pool tank 31 is collected as industrial water or abandoned from the pipeline 38 as described above.
【００１２】次に、図３について本発明第３実施例の詳
細を説明する。５１は、既に集塵，脱硝，脱硫処理され
た９５〜１２０℃といまだ高温の排ガスが流れる煙道
で、該煙道５１内の上部には、排ガスの流れに沿って複
数基の低温水を下向き，上向き、又は横向きに噴霧する
ノズル５２ａ〜５２ｃが配設されている。又前記煙道５
１の下辺には、前記ノズル５２ａ〜５２ｃに対応し、か
つ、煙道壁面を凹状とした集水ピット５３ａ〜５３ｃを
形成するとともに、この集水ピット５３ａ〜５３ｃの上
辺に煙道５１の通常壁面と一致する多孔板５４を張設
し、排ガスの流れに乱流が生じないようにしてある。前
記各集水ピット５３ａ〜５３ｂに接続した各管路５５ａ
〜５５ｃの上流側に夫々ポンプＰ111〜Ｐ333を設けると
ともに、各管路５５ａ〜５５ｃの下流端を異物除去手段
（図示略）をもつＰＨ調整タンク５６に接続する。又管
路５５ａと５５ｂには熱エネルギー回収のエコノマイザ
ー５７ａ，５７ｂを設け、更に前記ＰＨ調整タンク５６
内の回収水は、排水ポンプＰ444により海域５８中に放
棄されるよう構成されている。前記海域５８中に投入せ
る海水汲上げ用のポンプＰ555を管路５９を介して前記
ノズル５２ａ〜５２ｃに接続し、海水がノズル５２ａ〜
５２ｃより排ガス中に撒布されるようにしたものであ
る。図中Ｖ111〜Ｖ333は流量調整用のバルブ，６０は煙
道５１の上流側に必要に応じて配設される排ガスのドラ
フト補助用のファン，６１は水滴除去のデミスターであ
る。又前記集水ピット５３ｂに接続せる管路５５ｂの上
流端をポンプＰ666を介して集水ピット５３ａに接続
し、集水ピット５３ｂ内の捕捉水を集水ピット５３ａに
送り、捕捉水の温度が調整しうるようにしたものであ
る。Next, the third embodiment of the present invention will be described in detail with reference to FIG. Reference numeral 51 is a flue channel through which exhaust gas having a temperature as high as 95 to 120 ° C., which has already been subjected to dust collection, denitration, and desulfurization, flows, and a plurality of low-temperature waters are arranged along the exhaust gas flow in the upper portion of the flue 51. Nozzles 52a to 52c for spraying downward, upward, or sideways are provided. Also the flue 5
1, water collecting pits 53a to 53c corresponding to the nozzles 52a to 52c and having a concave flue wall surface are formed, and the normal side of the flue 51 is formed on the upper side of the water collecting pits 53a to 53c. A perforated plate 54 that matches the wall surface is stretched to prevent turbulence in the flow of exhaust gas. Each pipeline 55a connected to each of the water collection pits 53a to 53b
The pumps P 111 to P 333 are provided on the upstream sides of the to 55c, respectively, and the downstream ends of the respective pipelines 55a to 55c are connected to the PH adjusting tank 56 having foreign matter removing means (not shown). Further, economizers 57a and 57b for recovering heat energy are provided in the pipelines 55a and 55b, and the PH adjusting tank 56 is further provided.
The recovered water therein is configured to be abandoned into the sea area 58 by the drainage pump P 444 . A pump P 555 for pumping seawater to be introduced into the sea area 58 is connected to the nozzles 52a to 52c via a pipe 59, and seawater is supplied to the nozzles 52a to 52c.
52c is sprinkled in the exhaust gas. In the figure, V 111 to V 333 are valves for adjusting the flow rate, 60 is a fan for draft assistance of exhaust gas which is arranged as required on the upstream side of the flue 51, and 61 is a demister for removing water droplets. The upstream end of the conduit 55b to connect to the water collecting pit 53b via a pump P 666 connected to the water collection pits 53a, sends a capture water in the water collecting pit 53b in the water collecting pit 53a, the temperature of the trapped water Is adjustable.
【００１３】[0013]
【作用の説明】 上記第３実施例について、排ガスの冷
却，排熱回収作用を説明する。煙道５１内を流れる排ガ
スに各ノズル５２ａ〜５２ｃから噴霧される海水を撒布
接触させ、この霧状海水により排ガス中に含まれる水分
及びダストを捕捉するとともに、排ガス温度を降下させ
る。そして、排ガスの露点を降下させて外気に放出せし
める。一方、霧状海水の撒布により捕捉されたダストを
含む水分は、多孔板５４を通して集水ピット５３ａ〜５
３ｃ内に回収される。各集水ピット５３ａ〜５３ｃ内に
回収された撒布水の排熱は、管路５５ａ，５５ｂに設け
た熱エネルギー回収のエコノマイザー５７ａ，５７ｂに
より回収されながらＰＨ調整タンク５６内に低温水とし
て蓄えられるとともに、集水ピット５３ｃ内の回収水は
そのままＰＨ調整タンク５６に蓄えられ、このＰＨ調整
タンク５６内に導かれた低温水は異物除去手段（図示
略）により除塵される。そして、排ガスの排熱が回収さ
れ低温化された水は海域５８中に放棄される。[Explanation of Action] Regarding the third embodiment, the action of cooling exhaust gas and recovering exhaust heat will be described. Seawater sprayed from each of the nozzles 52a to 52c is sprinkled into contact with the exhaust gas flowing in the flue 51, and the atomized seawater captures moisture and dust contained in the exhaust gas and lowers the exhaust gas temperature. Then, the dew point of the exhaust gas is lowered and released to the outside air. On the other hand, the water content including dust captured by the spray of mist-like seawater passes through the perforated plate 54 and the water collecting pits 53a to 53a.
Recovered in 3c. The exhaust heat of the sprayed water collected in each of the water collecting pits 53a to 53c is stored as low-temperature water in the PH adjustment tank 56 while being collected by the economizers 57a and 57b for recovering heat energy provided in the pipelines 55a and 55b. At the same time, the collected water in the water collecting pit 53c is stored in the PH adjusting tank 56 as it is, and the low temperature water introduced into the PH adjusting tank 56 is dust-removed by a foreign matter removing means (not shown). Then, the water of which the exhaust heat of the exhaust gas is recovered and the temperature of which is lowered is abandoned in the sea area 58.
【００１４】[0014]
【発明の効果】 上述のように本発明の構成によれば、
次のような効果が得られる。 （ａ）集塵，脱硝，脱硫処理された高温の排ガスは、煙
道内に設けたノズルから霧状に撒布接触される低温水に
より捕捉され、排ガスの露点を降下させて外気より放出
されるため、煙突排気の白煙の発生が無くなり、煙突の
高さを低減化若しくは煙突レスとすることができる。 （ｂ）排ガスの排熱は熱エネルギー回収のエコノマイザ
ーにより回収され、排熱は有効に利用しうる。According to the configuration of the present invention as described above,
The following effects can be obtained. (A) The high temperature exhaust gas that has been subjected to dust collection, denitration and desulfurization is captured by the low temperature water that is spray-contacted from the nozzle provided in the flue in a mist state, and the dew point of the exhaust gas is lowered to be released from the outside air. The generation of white smoke in the chimney exhaust is eliminated, and the height of the chimney can be reduced or the chimney can be eliminated. (B) Exhaust heat of exhaust gas is recovered by a heat energy recovery economizer, and the exhaust heat can be effectively used.
【図１】 本発明第１実施例の説明図である。FIG. 1 is an explanatory diagram of a first embodiment of the present invention.
【図２】 本発明第２実施例の説明図である。FIG. 2 is an explanatory diagram of a second embodiment of the present invention.
【図３】 本発明第３実施例の説明図である。FIG. 3 is an explanatory diagram of a third embodiment of the present invention.
１ 煙道 ２ａ ノズル ２ｂ ノズル ２ｃ ノズル ２ｄ ノズル ３ 集水ピット ４ 多孔板 ５ａ 管路 ５ｂ 管路 ５ｃ 管路 ５ｄ 管路 ６ａ エコノマイザー ６ｂ エコノマイザー ６ｃ エコノマイザー ７ａ 熱交換器 ７ｂ 熱交換器 ７ｃ 熱交換器 ７ｄ 熱交換器 ７ｅ 熱交換器 ８ ＰＨ調整タンク ９ 循環管路 １０ ドラフト用のファン １１ デミスター １２ 水位検知手段 １３ 管路 ２１ 煙道 ２２ａ ノズル ２２ｂ ノズル ２２ｃ ノズル ２３ａ 集水ピット ２３ｂ 集水ピット ２３ｃ 集水ピット ２４ 多孔板 ２５ａ 管路 ２５ｂ 管路 ２５ｃ 管路 ２６ ＰＨ調整タンク ２７ａ エコノマイザー ２７ｂ エコノマイザー ２８ａ 熱交換器 ２８ｂ 熱交換器 ２８ｃ 熱交換器 ２９ タンク ３０ 管路 ３１ プールタンク ３２ 管路 ３３ 熱交換器 ３４ 循環管路 ３５ ドラフト補助用のファン ３６ デミスター ３７ 水位検知手段 ３８ 管路 ５１ 煙道 ５２ａ ノズル ５２ｂ ノズル ５２ｃ ノズル ５３ａ 集水ピット ５３ｂ 集水ピット ５３ｃ 集水ピット ５４ 多孔板 ５５ａ 管路 ５５ｂ 管路 ５５ｃ 管路 ５６ ＰＨ調整タンク ５７ａ エコノマイザー ５７ｂ エコノマイザー ５８ 海域 ５９ 管路 Ｐ ポンプ Ｖ バルブ 1 Flue 2a Nozzle 2b Nozzle 2c Nozzle 2d Nozzle 3 Water collecting pit 4 Perforated plate 5a Pipe 5b Pipe 5c Pipe 5d Pipe 6a Economizer 6b Economizer 6c Economizer 7a Heat exchanger 7b Heat exchanger 7c Heat exchanger 7c Container 7d Heat exchanger 7e Heat exchanger 8 PH adjustment tank 9 Circulation pipeline 10 Draft fan 11 Demister 12 Water level detection means 13 Pipeline 21 Flue 22a Nozzle 22b Nozzle 22c Nozzle 23a Water collection pit 23b Water collection pit 23c Collection Water pit 24 Perforated plate 25a Pipe line 25b Pipe line 25c Pipe line 26 PH adjusting tank 27a Economizer 27b Economizer 28a Heat exchanger 28b Heat exchanger 28c Heat exchanger 29 Tank 30 Pipe line 31 Pool tank 32 Pipe line 33 Heat exchange Device 34 circulation pipe 35 Raft assistance fan 36 Demister 37 Water level detection means 38 Pipeline 51 Flue 52a Nozzle 52b Nozzle 52c Nozzle 53a Water collecting pit 53b Water collecting pit 53c Water collecting pit 54 Perforated plate 55a Pipe 55b Pipe 55c Pipe 56 PH adjustment Tank 57a Economizer 57b Economizer 58 Sea area 59 Pipeline P Pump V Valve
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ２３Ｊ 15/06 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location F23J 15/06
Claims (12)
布接触させ、排ガス中に含まれる水分及びダストを捕捉
して排ガス温度を降下させることにより、排ガスの露点
を降下して外気に放出せしめ、一方、捕捉されたダスト
を含む水分及び撒布水を煙道に設けた集水ピットに回収
し、この集水ピット内の捕捉水の熱を適宜手段で回収し
ながらＰＨ調整タンクに導き、このＰＨ調整タンク内の
水を再び煙道内に循環撒布するとともに、余剰水の一部
を工水として回収又は放棄することを特徴とする排煙の
冷却，排熱回収システム。1. The dew point of the exhaust gas is lowered and released to the outside air by spraying the mist-like low-temperature water onto the exhaust gas flowing in the flue to contact it to capture the moisture and dust contained in the exhaust gas to lower the exhaust gas temperature. On the other hand, on the other hand, the moisture containing the captured dust and the sprayed water are recovered in the water collecting pit provided in the flue, and the heat of the captured water in this water collecting pit is guided to the pH adjusting tank while collecting by appropriate means, A flue gas cooling and exhaust heat recovery system characterized in that the water in the pH adjusting tank is circulated again in the flue and part of the surplus water is recovered or discarded as industrial water.
流れに沿って霧状低温水の撒布手段を複数基段階的に配
設し、この各撒布手段に対応して複数の集水ピットを設
け、排ガスの水分が温度別に回収しうるようにしたこと
を特徴とする排煙の冷却，排熱回収システム。2. The plurality of water collecting pits according to claim 1, wherein a plurality of spraying means for spraying mist-like low-temperature water are arranged in stages in the flue along the flow of the exhaust gas, and a plurality of water collecting pits are provided corresponding to the spraying means. The flue gas cooling and exhaust heat recovery system is characterized in that the water content of the exhaust gas can be recovered by temperature.
ＰＨ調整タンクとを結ぶ管路に、熱エネルギー回収のエ
コノマイザーを設けた排煙の冷却，排熱回収システム。3. The flue gas cooling / exhaust heat recovery system according to claim 1 or 2, wherein an economizer for recovering heat energy is provided in a pipe line connecting the water collecting pit and the pH adjusting tank.
トとＰＨ調整タンクとを結ぶ管路に、海水を利用した熱
交換器を設けたことを特徴とする排煙の冷却，排熱回収
システム。4. The cooling and exhaust heat of flue gas according to claim 1, 2 or 3, characterized in that a heat exchanger using seawater is provided in a pipe line connecting the water collecting pit and the pH adjusting tank. Recovery system.
極低温液化ガスにて冷却されるプロパノールなどの中間
媒体による熱交換器にて低温化された霧状の水を撒布さ
せ、排ガス中に含まれる水分及びダストを捕捉して排ガ
ス温度を降下させることにより、排ガスの露点を降下し
て外気に放出せしめ、一方、捕捉されたダストを含む水
分及び撒布水を煙道に設けた集水ピットに回収し、この
集水ピット内の捕捉水の熱を適宜手段で回収しながら、
ＰＨ調整タンクを介し、前記中間媒体を用いた熱交換器
にて再低温化して再び煙道内に循環撒布するとともに、
ＰＨ調整タンクから捕捉水の一部を工水として回収又は
放棄することを特徴とする排煙の冷却，排熱回収システ
ム。5. Mist-like water whose temperature is lowered by a heat exchanger using an intermediate medium such as propanol cooled by a cryogenic liquefied gas such as LNG is sprinkled on the exhaust gas flowing in the flue gas, and the exhaust gas is discharged into the exhaust gas. By collecting the moisture and dust contained in it and lowering the temperature of the exhaust gas, the dew point of the exhaust gas is lowered and released to the outside air, while the water and the spray water containing the captured dust are installed in the flue. While collecting the heat of the trapped water in this water collecting pit by an appropriate means,
Through the pH adjusting tank, the temperature is re-cooled by the heat exchanger using the intermediate medium, and is circulated and sprayed again in the flue.
A flue gas cooling and exhaust heat recovery system characterized by recovering or discarding part of the captured water from the pH adjustment tank as industrial water.
中間媒体を用いた熱交換器を結ぶ管路に、撒布水のプー
ルタンクを設けたことを特徴とする排煙の冷却，排熱回
収システム。6. The flue gas cooling and exhaust heat according to claim 5, wherein a spray water pool tank is provided in a pipe line connecting the low temperature water spraying means and the heat exchanger using the intermediate medium. Recovery system.
排ガスの流れに沿って霧状低温水の撒布手段を複数基段
階的に配設し、この各撒水手段に対応して複数の集水ピ
ットを設け、排ガス中の水分が温度別に回収しうるよう
にしたことを特徴とする排煙の冷却，排熱回収システ
ム。7. The spraying means according to claim 5 or 6, wherein a plurality of spraying means for atomized low-temperature water are arranged stepwise along the flow of the exhaust gas flowing through the flue, and a plurality of collecting means are provided corresponding to each spraying means. A flue gas cooling / exhaust heat recovery system that has a water pit so that water in exhaust gas can be recovered by temperature.
ットとＰＨ調整タンクを結ぶ管路に、熱エネルギー回収
のエコノマイザーを設けたことを特徴とする排煙の冷
却，排熱回収システム。8. The flue gas cooling and exhaust heat recovery according to claim 5, 6, or 7, characterized in that an economizer for recovering heat energy is provided in a pipe line connecting the water collecting pit and the pH adjusting tank. system.
ピットとＰＨ調整タンクを結ぶ管路に、海水を利用した
熱交換器を設けたことを特徴とする排煙の冷却，排熱回
収システム。9. The flue gas cooling and exhaust system according to claim 5, 6, 7 or 8, wherein a heat exchanger using seawater is provided in a pipe line connecting the water collecting pit and the pH adjusting tank. Heat recovery system.
布接触させ、排ガス中に含まれる水分及びダストを捕捉
して排ガス温度を降下させることにより、排ガスの露点
を降下して外気に放出せしめ、一方、捕捉されたダスト
を含む水分及び撒布海水を煙道に設けた集水ピットに回
収し、この集水ピット内の捕捉水の適宜手段で回収しな
がらＰＨ調整タンクに導き、このＰＨ調整タンク内の水
を海域に放棄するようにしたことを特徴とする排煙の冷
却，排熱回収システム。10. The exhaust gas flowing in the flue is spray-contacted with mist-like seawater to capture moisture and dust contained in the exhaust gas to lower the exhaust gas temperature, thereby lowering the dew point of the exhaust gas and releasing it to the outside air. On the other hand, the water containing the captured dust and the sprinkled seawater are collected in a water collecting pit provided in the flue, and the collected water in the water collecting pit is guided to a pH adjusting tank while being collected by an appropriate means, and the pH adjustment is performed. A flue gas cooling and exhaust heat recovery system characterized by abandoning the water in the tank to the sea area.
スの流れに沿って霧状海水の撒布手段を複数基段階的に
配設し、この撒布手段に対応して複数の集水ピットを設
け、排ガス中の水分が温度別に回収しうるようにしたこ
とを特徴とする排煙の冷却，排熱回収システム。11. The spraying means according to claim 10, wherein a plurality of spraying means of mist-like seawater are arranged stepwise along the flow of the exhaust gas, and a plurality of water collecting pits are provided corresponding to the spraying means. A flue gas cooling / exhaust heat recovery system characterized in that moisture in exhaust gas can be recovered according to temperature.
ットとＰＨ調整タンクを結ぶ管路に、熱エネルギー回収
のエコノマイザーを設けたことを特徴とする排煙の冷
却，排熱回収システム。12. The flue gas cooling / exhaust heat recovery system according to claim 10 or 11, wherein an economizer for recovering heat energy is provided in a pipe line connecting the water collecting pit and the pH adjusting tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7347437A JPH09166315A (en) | 1995-12-14 | 1995-12-14 | Exhaust gas cooling and exhaust heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7347437A JPH09166315A (en) | 1995-12-14 | 1995-12-14 | Exhaust gas cooling and exhaust heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09166315A true JPH09166315A (en) | 1997-06-24 |
Family
ID=18390233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7347437A Pending JPH09166315A (en) | 1995-12-14 | 1995-12-14 | Exhaust gas cooling and exhaust heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09166315A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293356C (en) * | 2003-09-02 | 2007-01-03 | 肖国雄 | Equipment for recovering multistaged waste heat of gas in flue |
| CN102588989A (en) * | 2012-02-24 | 2012-07-18 | 总装备部工程设计研究总院 | Smoke spraying and purifying heat recovery system of gas boiler as well as gas and fuel oil burning device |
| JP2014528827A (en) * | 2011-09-30 | 2014-10-30 | アルファ−ラヴァル・コーポレート・アーベー | Scrubber system and method |
| CN104764193A (en) * | 2015-04-20 | 2015-07-08 | 张建平 | Efficient smoke water washing heat recycling device |
| CN106765253A (en) * | 2016-12-23 | 2017-05-31 | 北京建筑大学 | A kind of Horizental showering formula fume afterheat gradient utilization system |
| CN108854455A (en) * | 2018-07-11 | 2018-11-23 | 苏州艾特斯环保设备有限公司 | A kind of high temperature and humidity flue gas wet process cooling humidity reduction method |
| CN109114583A (en) * | 2018-09-26 | 2019-01-01 | 西安交通大学 | A kind of coal fired power plant smoke waste heat utilization system and working method |
| CN109173563A (en) * | 2018-11-19 | 2019-01-11 | 福建南方路面机械有限公司 | A kind of exhaust treatment system of bituminous mixing plant |
| JPWO2021111957A1 (en) * | 2019-12-04 | 2021-06-10 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293356C (en) * | 2003-09-02 | 2007-01-03 | 肖国雄 | Equipment for recovering multistaged waste heat of gas in flue |
| JP2014528827A (en) * | 2011-09-30 | 2014-10-30 | アルファ−ラヴァル・コーポレート・アーベー | Scrubber system and method |
| CN102588989A (en) * | 2012-02-24 | 2012-07-18 | 总装备部工程设计研究总院 | Smoke spraying and purifying heat recovery system of gas boiler as well as gas and fuel oil burning device |
| CN104764193A (en) * | 2015-04-20 | 2015-07-08 | 张建平 | Efficient smoke water washing heat recycling device |
| CN104764193B (en) * | 2015-04-20 | 2017-09-29 | 张建平 | A kind of high effective flue gas washes heat reclamation device |
| CN106765253A (en) * | 2016-12-23 | 2017-05-31 | 北京建筑大学 | A kind of Horizental showering formula fume afterheat gradient utilization system |
| CN108854455A (en) * | 2018-07-11 | 2018-11-23 | 苏州艾特斯环保设备有限公司 | A kind of high temperature and humidity flue gas wet process cooling humidity reduction method |
| CN109114583A (en) * | 2018-09-26 | 2019-01-01 | 西安交通大学 | A kind of coal fired power plant smoke waste heat utilization system and working method |
| CN109114583B (en) * | 2018-09-26 | 2024-01-09 | 西安交通大学 | A coal-fired power station flue gas waste heat utilization system and working method |
| CN109173563A (en) * | 2018-11-19 | 2019-01-11 | 福建南方路面机械有限公司 | A kind of exhaust treatment system of bituminous mixing plant |
| CN109173563B (en) * | 2018-11-19 | 2024-03-19 | 福建南方路面机械股份有限公司 | Tail gas treatment system of asphalt mixing plant |
| JPWO2021111957A1 (en) * | 2019-12-04 | 2021-06-10 | ||
| WO2021111957A1 (en) * | 2019-12-04 | 2021-06-10 | 富士電機株式会社 | Exhaust gas processing device |
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