JPH0468202A - Method of removing dissolved oxygen in supplied water for boiler - Google Patents
Method of removing dissolved oxygen in supplied water for boilerInfo
- Publication number
- JPH0468202A JPH0468202A JP18009390A JP18009390A JPH0468202A JP H0468202 A JPH0468202 A JP H0468202A JP 18009390 A JP18009390 A JP 18009390A JP 18009390 A JP18009390 A JP 18009390A JP H0468202 A JPH0468202 A JP H0468202A
- Authority
- JP
- Japan
- Prior art keywords
- boiler
- water
- closed container
- supplied
- dissolved oxygen
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 63
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000001301 oxygen Substances 0.000 title claims abstract description 27
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002918 waste heat Substances 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims abstract 2
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000053 physical method Methods 0.000 description 4
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 229940123973 Oxygen scavenger Drugs 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- -1 @soda Substances 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Landscapes
- Physical Water Treatments (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はボイラその他の炉から排出される排熱を利用し
て、ボイラ給水を高温水とガし該高温水を密閉容器中に
フラッシングさせることによって、各種ボイラ給水中に
含まれる溶存酸素を簡単な装置によって給水中から除去
するボイラ供給水の溶存酸素除去方法に罠するものであ
〔従来の技術〕
従来一般に給水中に含まれる溶存酸素はボイラを構成す
る鋼板の腐食の原因とカシ、その除去方法としては物理
的方法と化学的方法とがある。[Detailed Description of the Invention] [Industrial Application Field] The present invention utilizes waste heat discharged from boilers and other furnaces to pump boiler feed water with high-temperature water and flush the high-temperature water into a closed container. This is a problem with methods for removing dissolved oxygen from boiler feed water, which remove dissolved oxygen contained in feed water to various boilers using a simple device. Oak is the cause of corrosion of the steel plates that make up the boiler, and there are physical methods and chemical methods for removing it.
物理的方法としては脱気器と称されるものがその代表的
表もので、ボイラ供給水を耐圧容器内に加圧スプレーし
、ボイラよシ発生する蒸気やその他の蒸気を利用して、
これらと熱交換することによって給水温度を上げ、酸素
の水に対する溶解度の変化によシ容器外へ抽気放出する
方法でＩＣ５その他として、真空脱気法による減圧下で
脱気する方法がおる。A typical physical method is what is called a deaerator, in which boiler supply water is sprayed under pressure into a pressure-resistant container, and steam generated by the boiler or other steam is used.
There is a method in which the temperature of the feed water is raised by exchanging heat with these, and the change in the solubility of oxygen in water causes the water to be extracted and released to the outside of the container.In addition to IC5, there is a method in which the water is degassed under reduced pressure using a vacuum deaeration method.
又一方化学的方法としては脱酸素剤をボイラ供給水中に
投入し、該供給水中の溶存酸素と反応させて、酸化物と
して鋼との反トを停止させるという方法である。On the other hand, as a chemical method, an oxygen scavenger is introduced into the water supplied to the boiler, and reacts with dissolved oxygen in the water to form an oxide that stops the reaction with steel.
従来の上記したボイラ給水からその溶存酸素の除去に対
する作用効果については既に認められているが、近時上
記従来の方法について経済的な面及び使用薬品中に含１
れる有害物質の面から改善要求が望まれている。Although the effectiveness of the conventional method for removing dissolved oxygen from boiler feed water has already been recognized, recent studies have focused on the economic aspects and the concentration of oxygen contained in the chemicals used in the conventional method.
Requests for improvement are desired from the perspective of harmful substances.
先づ前者の物理的方法はボイラと一体化された簡易型と
全く別に設置された定量型との三方式に分けられるが、
簡易型の場合については予熱さレタ給水は自刃（ヘッド
）でボイラ側へ供給されるため、脱気器をボイラの上部
に設置して、ヘッドを持たせることが必要となり、据付
は上高さが要求され、また容器も重量面からその応用に
制約がでてくること、及び給水の予熱としてボイラの発
生蒸気が使用されるため容器としてはボイラの最高使用
圧力相当とせねばならず、材料、製作工数などが高価に
なる問題点があった。The former physical method can be divided into three types: a simple type that is integrated with the boiler, and a quantitative type that is installed completely separately.
In the case of the simple type, preheated water is supplied to the boiler side using a self-cutting blade (head), so it is necessary to install the deaerator at the top of the boiler and hold the head, and installation is required at the top height. In addition, there are restrictions on the application of the container due to its weight, and since the steam generated by the boiler is used to preheat the feed water, the container must be designed to correspond to the maximum working pressure of the boiler, and the material, There was a problem that manufacturing man-hours were expensive.
定量型の場合については、上記簡易型の欠点は緩和され
ているもののボイラと同圧でない場合は蒸気ラインに減
圧弁を設ける必要があること、高圧の蒸気配管を施さね
ばならず、その付帯工事とともに非常に高価につく問題
点がある。In the case of fixed-rate type, although the drawbacks of the above-mentioned simple type are alleviated, it is necessary to install a pressure reducing valve in the steam line if the pressure is not the same as that of the boiler, high-pressure steam piping must be installed, and additional work is required. There is also the problem that it is very expensive.
何れにせよこれらの物理的方法はボイラで発生した蒸気
の一部を使用して給水を加熱且つその一部を大気に放出
するためボイラ自身の熱損失を生じることになる。In any case, these physical methods use part of the steam generated in the boiler to heat the feed water and release part of it to the atmosphere, resulting in heat loss in the boiler itself.
つぎに後者の化学的方法は給水中に脱酸素剤として例え
ばヒドラジン、亜Ｗ、＠ソーダ、デキストリン等の糖類
等が使用されるが、その蒸気が成分によって有害なもの
があシ、有害成分でなくてもその管理を少しでも間違え
ると、逆に腐食を促進させるものに変化したシ、また高
価につくなど使用上程々な問題点があや、上記のような
種々な意味から改善策が要望されていた。Next, in the latter chemical method, sugars such as hydrazine, nitrous oxide, @soda, and dextrin are used as oxygen scavengers in the water supply, but the vapor may be harmful depending on the component. Even if there is no such thing, if there is even a slight mistake in its management, it can turn into something that accelerates corrosion, and it can also cause problems in use, such as being expensive. was.
本発明はボイラ及びその他の炉等より排出される排熱を
利用することによって、前記の種々な問題点を解決して
ボイラ輸水中の溶存酸素を除去することを目的とするも
のである。The object of the present invention is to solve the various problems mentioned above and remove dissolved oxygen in boiler infusion water by utilizing waste heat discharged from boilers and other furnaces.
本発明は上記の目的を達成するために、各種ボイラに供
給される給水に前処理としてボイラ及びその他の炉等よ
り排出される排熱を利・用して、該給水を１００℃以上
の高温水とし、該高温水を横型もしくは縦型の密閉容器
中ヘフラッシングさせて、ボイラに供給すべき給水中に
溶存した酸素を該密閉容器内で分離し、密閉容器外へ放
出することを特徴とする各種ボイラ用給水中の溶存酸素
除去方法を提供するものである。In order to achieve the above object, the present invention utilizes waste heat discharged from boilers and other furnaces as a pretreatment for the feed water supplied to various boilers, and heats the feed water to a high temperature of 100°C or more. water, the high-temperature water is flushed into a horizontal or vertical closed container, the oxygen dissolved in the feed water to be supplied to the boiler is separated in the closed container, and the oxygen is released outside the closed container. The present invention provides a method for removing dissolved oxygen from feed water for various boilers.
本発明に使用の溶存酸素除去装置としては給水を１００
℃以上の高温に予熱する給水予熱器（エコノマイザ−）
と予熱された給水を減圧フラッシングさせるための密閉
容器とから構成される。The dissolved oxygen removal device used in the present invention uses a water supply of 100%
Water supply preheater (economizer) that preheats to a high temperature above ℃
and a closed container for flushing the preheated water supply under reduced pressure.
即ち一般的には各種排熱と熱交換させた給水とを後段に
設置された密閉容器より取シ出す温度よりも高くし、そ
の温度差でもって密閉容器内でフラッシングさせる。そ
の際、給水中に含まれた溶存酸素はその温度に相当する
溶解度まで低下するため、給水中から脱気され、系外へ
排出されることによってボイラへ供給される給水中の溶
存酸素は減少する。That is, generally, the temperature of the supplied water that has undergone heat exchange with various types of waste heat is set higher than the temperature at which it is taken out from a closed container installed at a later stage, and the temperature difference is used to flush the water inside the closed container. At that time, the dissolved oxygen contained in the feed water decreases to the solubility corresponding to its temperature, so the dissolved oxygen in the feed water supplied to the boiler decreases as the feed water is degassed and discharged to the outside of the system. do.
次に本発明の一冥施例を示す。 Next, a further example of the present invention will be shown.
第１図に示す密閉容器（２）を使用して、給水加熱装置
より溶存酸素ｓ、ｚｐｐｍを含有する１１５℃に昇温し
た加熱水を５ｚｓｏｔｆ／ｈの割合でボイラ供給水が収
容された密閉容器中にフラッシングさせる。その際ボイ
ラ供給水の溶存酸素は蒸気とともに蒸気排出口（６）よ
シ排出される。然るときは密閉容器中よシボイラへの供
給水の温度は１１０℃であった。密閉容器中のボイラ供
給水は８１７２Ｊ Ｋｙ７ｈの割合でボイラ給水ポンプ
よりボイラに供給され、該ボイラ供給水中の溶存酸素の
量は０．１ ｐｐｍに低下し、ボイラ供給水としては好
適な溶存酸素の値に低下してボイラに供給された。Using the sealed container (2) shown in Figure 1, heated water heated to 115°C containing dissolved oxygen s, z ppm from the feed water heating device is heated to a sealed container containing boiler feed water at a rate of 5 z sotf/h. Flush into container. At this time, dissolved oxygen in the boiler feed water is discharged together with steam through the steam outlet (6). At that time, the temperature of the water supplied to the boiler in the closed container was 110°C. The boiler feed water in the sealed container is fed to the boiler from the boiler feed water pump at a rate of 8172J Ky7h, and the amount of dissolved oxygen in the boiler feed water is reduced to 0.1 ppm, which is suitable for boiler feed water. The value dropped and was fed to the boiler.
本発明の効果を纒めると下記の通やである。 The effects of the present invention can be summarized as follows.
イ ボイラその他の炉よシ排熱をボイラ給水の溶存酸素
の除去に使用することによって、従来ややもすると捨て
られている熱の回収が可能となシ、更にボイラから系外
へ放出さｎる蒸気は低温の排熱であるが故にボイラ側の
熱損失はなく、その経済的効果は著しく大であ幹） 本
発明のような簡単な方法によって、ボイラ給水中の溶存
酸素が減少し、その実用的効果は多大である。(b) By using waste heat from boilers and other furnaces to remove dissolved oxygen from boiler feed water, it is possible to recover heat that would otherwise have been wasted in the past. Since steam is low-temperature waste heat, there is no heat loss on the boiler side, and the economic effect is extremely large.) By the simple method of the present invention, dissolved oxygen in boiler feed water is reduced, and its The practical effects are enormous.
（ハ）本発明の装置によってその制御される温度レベル
が圧力で考えてみると” Ｋちｉｇ程度の比較的低圧で
もって処置できるため、密閉容器が安価であること及び
ボイラへの給水ポンプの耐圧設計もそれほど要求されな
いため、従来品より経済的に有利である。(c) Considering the temperature level controlled by the device of the present invention in terms of pressure, it can be treated with a relatively low pressure of about 1000 yen, so the closed container is inexpensive and the water supply pump to the boiler is Since pressure-resistant design is not required as much, it is more economically advantageous than conventional products.
第１図は本発明に使用される溶存酸素除去装置の横型密
閉容器を使用した一実施例、第２図は縦型密閉容器を使
用した場合の他の一実施例を示す。FIG. 1 shows an embodiment of the dissolved oxygen removal apparatus used in the present invention using a horizontal sealed container, and FIG. 2 shows another embodiment using a vertical sealed container.
Claims (1)
ラ及びその他の炉より排出される排熱を利用して、該給
水を１００℃以上の高温水とし、該高温水を横型もしく
は縦型の密閉容器中へフラツシングさせ、ボイラに供給
すべき給水中に溶存した酸素を該密閉容器内で分離し、
密閉容器外へ放出することを特徴とする各種ボイラ用給
水中の溶存酸素除去方法。1. As a pre-treatment for the feed water supplied to various boilers, the waste heat discharged from the boiler and other furnaces is used to make the feed water a high temperature water of 100℃ or more, and the high temperature water is heated to a horizontal or vertical type. Flushing into a closed container and separating dissolved oxygen in the feed water to be supplied to the boiler in the closed container,
A method for removing dissolved oxygen in feed water for various boilers, which is characterized by discharging it outside of a closed container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18009390A JPH0468202A (en) | 1990-07-06 | 1990-07-06 | Method of removing dissolved oxygen in supplied water for boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18009390A JPH0468202A (en) | 1990-07-06 | 1990-07-06 | Method of removing dissolved oxygen in supplied water for boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0468202A true JPH0468202A (en) | 1992-03-04 |
Family
ID=16077318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18009390A Pending JPH0468202A (en) | 1990-07-06 | 1990-07-06 | Method of removing dissolved oxygen in supplied water for boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0468202A (en) |
-
1990
- 1990-07-06 JP JP18009390A patent/JPH0468202A/en active Pending
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