JP3107979B2 - Defoaming equipment for steel strip cleaning equipment - Google Patents
Defoaming equipment for steel strip cleaning equipmentInfo
- Publication number
- JP3107979B2 JP3107979B2 JP06232439A JP23243994A JP3107979B2 JP 3107979 B2 JP3107979 B2 JP 3107979B2 JP 06232439 A JP06232439 A JP 06232439A JP 23243994 A JP23243994 A JP 23243994A JP 3107979 B2 JP3107979 B2 JP 3107979B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- foam
- steel strip
- gas
- defoaming
- 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
- 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
- Degasification And Air Bubble Elimination (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋼帯の洗浄工程で発生
する泡沫を消泡する装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing foam generated in a steel strip washing process.
【０００２】[0002]
【従来の技術】冷間圧延後の鋼帯の表面には、圧延油及
び圧延油に混ざった鉄粉等のゴミが付着しており、この
鋼帯をそのまま焼鈍或いはメッキ工程に通すと、スケー
ル残りや不メッキ等の表面品質欠陥を生じる。このため
通常、焼鈍やメッキ工程の前に、鋼帯洗浄工程で圧延油
やゴミを除去する処理を施している。2. Description of the Related Art Rolling oil and dust such as iron powder mixed with the rolling oil adhere to the surface of a steel strip after cold rolling. If the steel strip is passed through an annealing or plating process as it is, a scale is produced. Surface quality defects such as residue and non-plating occur. Therefore, before the annealing and plating steps, a treatment for removing rolling oil and dust is usually performed in a steel strip cleaning step.
【０００３】鋼帯洗浄設備では苛性ソーダやオルソ珪酸
ソーダ等のアルカリ溶液に鋼帯を浸漬し、鋼帯に付着し
た油分とアルカリが化学反応（ケン化反応）する事によ
り圧延油を除去する。In the steel strip cleaning equipment, the steel strip is immersed in an alkaline solution such as caustic soda or sodium orthosilicate, and the rolling oil is removed by a chemical reaction (saponification reaction) between the oil adhering to the steel strip and the alkali.
【０００４】この時石鹸の生成に伴い、液の界面張力が
低下するため発泡が起こり、泡が洗浄液槽より溢れ出し
て周辺部を汚染し、槽周辺の作業環境を悪化させる問題
があった。[0004] At this time, foaming occurs due to a decrease in the interfacial tension of the liquid accompanying the generation of the soap, and the foam overflows from the cleaning liquid tank to contaminate the peripheral area, thereby deteriorating the working environment around the tank.
【０００５】この発泡に対し、従来以下の対策が提案さ
れている。 （１）洗浄液槽の密閉化。 槽外への泡の漏出を防ぐために洗浄液槽を完全密閉化す
る方法。 （２）オーバーフロー管（以下ＯＦ管と称す。）の設
置。 発生した泡を排出するために洗浄液槽上部にＯＦ管を設
置する方法。 （３）加熱式消泡装置の設置。（特開昭５１−１０３６
５９号公報） 泡加熱装置により泡内部の気体を熱膨張させ破泡せしめ
る方法。Conventionally, the following measures have been proposed for this foaming. (1) Sealing of the cleaning liquid tank. A method that completely seals the cleaning liquid tank to prevent bubbles from leaking out of the tank. (2) Installation of an overflow pipe (hereinafter referred to as an OF pipe). A method of installing an OF pipe on the upper part of the cleaning liquid tank to discharge generated foam. (3) Installation of a heating type defoaming device. (JP-A-51-1036
No. 59) A method in which a gas inside a foam is thermally expanded and broken by a foam heating device.
【０００６】（４）実公平３−４３１２号公報に示され
る装置による方法。 空気あるいは他の気体、または気−液混合体若しくは液
体を駆動力としたエジェクターにより、液面上の泡沫を
吸引し、吸引した泡をエジェクター内部に生ずる減圧効
果によって破泡して液状化する。加えて液状化した泡沫
が液面上の泡沫に対して斜め上方より噴射されるよう、
前記エジェクターの吐出口を開口せしめ、２重の消泡作
用を行う方法。(4) A method using an apparatus disclosed in Japanese Utility Model Publication No. 3-4312. Foam on the liquid surface is sucked by an ejector driven by air or another gas, or a gas-liquid mixture or liquid, and the sucked foam is broken and liquefied by a decompression effect generated inside the ejector. In addition, so that the liquefied foam is sprayed diagonally from above the foam on the liquid level,
A method in which a discharge port of the ejector is opened to perform a double defoaming action.
【０００７】[0007]
【発明が解決しようとする課題】前記の技術には次のよ
うな問題点がある。 （１）洗浄液槽の密閉化。 洗浄液槽を完全に密閉化するためには、鋼帯が洗浄液槽
に入る箇所をも密閉化しなくてはならず、このためのシ
ール部が必要となる。しかるにシール部が存在すると、
鋼帯洗浄設備の工程能力の低下や整備コストがかさむと
いう問題がある。The above technique has the following problems. (1) Sealing of the cleaning liquid tank. In order to completely seal the cleaning liquid tank, the place where the steel strip enters the cleaning liquid tank must also be sealed, and a seal portion is required for this. However, if there is a seal part,
There is a problem that the process capability of the steel strip cleaning equipment is reduced and the maintenance cost is increased.
【０００８】（２）ＯＦ管の設置。 ＯＦ管によって泡を排出する場合洗浄液を捨てる事にな
るため、洗浄液コストが悪化したり、廃液処理コストが
かかるという問題がある。(2) Installation of an OF pipe. When the bubbles are discharged by the OF pipe, the cleaning liquid is discarded, so that there is a problem that the cleaning liquid cost is deteriorated and the waste liquid processing cost is increased.
【０００９】（３）加熱式消泡装置。 多量の泡沫を消泡する場合加熱設備が大規模になり設備
コストが大きくなる他、泡沫加熱のためのエネルギーコ
ストがかかったり、加熱時の安全性の問題がある。(3) A heating type defoaming device. When a large amount of foam is to be defoamed, the heating equipment becomes large-scale and the equipment cost increases. In addition, energy costs for heating the foam are required, and there is a problem of safety during heating.
【００１０】（４）実公平３−４３１２号公報に示され
る装置。 〈1〉エジェクター駆動力として用いる流体が高速で液
面を叩くため液面に乱れを生じ、新たな発泡が起こる。
又、流体が液面上の泡沫を吹き飛ばし、泡沫がエジェク
ターに吸引されず槽外へ泡沫が流出するため、十分な消
泡効果が得られない。(4) Apparatus disclosed in Japanese Utility Model Publication No. 3-4312. <1> Since the fluid used as the ejector driving force hits the liquid surface at a high speed, the liquid surface is disturbed, and new foaming occurs.
Further, since the fluid blows off the foam on the liquid surface and the foam flows out of the tank without being sucked by the ejector, a sufficient defoaming effect cannot be obtained.
【００１１】〈2〉消泡された泡沫の液滴が、エジェク
ター駆動力として用いる流体によって加速され、高速で
液面に衝突するために再度発泡が起こる。<2> The defoamed foam droplets are accelerated by the fluid used as the ejector driving force, and collide with the liquid surface at high speed, so that foaming occurs again.
【００１２】[0012]
【課題を解決するための手段】本発明は上記問題点に鑑
みてなされたもので、以下に述べる構造の消泡装置であ
る。即ち本発明は図１に示すように、鋼帯洗浄設備（図
示せず）の洗浄槽２の側面上部に一端を連通させて設け
たＯＦ管３が下降し始める水平断面４でのＯＦ管径をｄ
として、該水平断面４より上に２ｄ、下にｄの高さ範囲
に先端が位置し、ＯＦ管内を下向きにガスを吹き込むノ
ズル６を有し（図１中ではノズル先端５を上にｄの位置
に設置した場合を示してある）、且つ、ＯＦ管の下端７
を該洗浄液槽下部に連通させ、更にＯＦ管の途中、該水
平断面４より３ｄ以上下方にＯＦ管３との連通部上端が
位置するガス抜き管８を有する（図１中では３ｄの位置
の場合が示してある。）ことを特徴とする鋼帯洗浄設備
の消泡装置である。なお、図中１３は洗浄液を表す。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and is an antifoaming device having the following structure. That is, according to the present invention, as shown in FIG. 1, an OF pipe 3 provided with one end communicating with an upper side of a cleaning tank 2 of a steel strip cleaning equipment (not shown) has an OF pipe diameter in a horizontal cross section 4 at which the OF pipe 3 starts to descend. To d
As shown in FIG. 1, the tip is located in a height range of 2d above the horizontal section 4 and d below the horizontal section, and has a nozzle 6 for blowing gas downward in the OF pipe (in FIG. Position is shown) and the lower end 7 of the OF pipe
And a gas vent pipe 8 at the upper end of the communicating part with the OF pipe 3 at a position 3 d or more below the horizontal cross section 4 in the middle of the OF pipe (see the position of 3 d in FIG. 1). This is a defoaming device for a steel strip cleaning facility. In the figure, reference numeral 13 denotes a cleaning liquid.
【００１３】[0013]
【作用】以下に本発明の作用を図面を参照しながら説明
する。図２においてガス吹き込みノズル６より気体１４
を噴出させると、エジェクター効果により洗浄液槽２内
に生成した泡沫１は吸引され、ＯＦ管３内へと導入され
る。The operation of the present invention will be described below with reference to the drawings. In FIG. 2, the gas 14 is supplied from the gas injection nozzle 6.
Is ejected, the foam 1 generated in the cleaning liquid tank 2 by the ejector effect is sucked and introduced into the OF pipe 3.
【００１４】エジェクター効果を効率的に得るために
は、図１に示すようにＯＦ管３が下降しはじめる水平断
面４を中心に、水平断面でのＯＦ管径をｄとして該水平
断面より上に２ｄ、下にｄの高さ範囲に先端５が位置す
るようにガス吹き込みノズル６を設置する必要がある。In order to efficiently obtain the ejector effect, as shown in FIG. 1, centering on the horizontal cross section 4 where the OF pipe 3 starts to descend, the diameter of the OF pipe in the horizontal cross section is defined as d and above the horizontal cross section. It is necessary to install the gas blowing nozzle 6 so that the tip 5 is located in the height range of 2d and d below.
【００１５】図３にガス吹き込みノズルの設置位置と、
ＯＦ管降下開始水平断面４にノズル先端がある場合の吸
引力を１とした時の相対エジェクター吸引力の関係を示
す。吸引された泡沫１は図２のように、ノズル６からの
噴流の拡がり９によりＯＦ管３の内壁へ押しつけられ、
破泡・液化する。FIG. 3 shows the installation position of the gas injection nozzle,
The relationship of the relative ejector suction force when the suction force when the nozzle tip is located at the horizontal section 4 at the start of the OF pipe descent is 1 is shown. The sucked foam 1 is pressed against the inner wall of the OF pipe 3 by the spread 9 of the jet from the nozzle 6 as shown in FIG.
Breaks and liquefies.
【００１６】液化泡沫１０はＯＦ管内壁面に沿って流下
するが、ＯＦ管３の下端７は洗浄液槽２の下部に連通さ
せてあるため、ＯＦ管内には洗浄液槽２の洗浄液１３と
同じ高さに液面１５が形成されており、流下してきた液
化泡沫１０はこの液面に吸収される。この吸収は液化泡
沫１０が壁面を伝って穏やかに行われるため、液と液の
衝突時に起こる発泡を避けることができる。Although the liquefied foam 10 flows down along the inner wall surface of the OF pipe, the lower end 7 of the OF pipe 3 is communicated with the lower part of the cleaning liquid tank 2 so that the OF pipe 3 has the same height as the cleaning liquid 13 in the cleaning liquid tank 2. The liquid surface 15 is formed on the liquid surface, and the liquefied foam 10 flowing down is absorbed by the liquid surface. Since this absorption is performed gently along the wall surface of the liquefied foam 10, foaming that occurs at the time of collision between liquids can be avoided.
【００１７】吸収後の泡沫はＯＦ管の下端７を経て洗浄
液槽２に回収される。消泡後の気体はガス抜き管８を通
じて排出されるが、気体がＯＦ管内の液面１５に衝突し
ないため発泡が起こらない。The foam after absorption is collected in the washing liquid tank 2 via the lower end 7 of the OF pipe. The gas after defoaming is discharged through the degassing pipe 8, but no foaming occurs because the gas does not collide with the liquid surface 15 in the OF pipe.
【００１８】消泡能力を効率的に得るために、ＯＦ管３
とガス抜き管８の連通部分上端の位置は該ＯＦ管降下開
始水平断面４より３ｄ以上下方に設置する必要がある。
図４にガス抜き管８の位置と消泡能力の関係を示す。In order to obtain the defoaming ability efficiently, the OF pipe 3
The position of the upper end of the communicating portion between the gas pipe 8 and the gas vent pipe 8 needs to be located at least 3d below the horizontal cross section 4 where the OF pipe starts to descend.
FIG. 4 shows the relationship between the position of the degassing pipe 8 and the defoaming ability.
【００１９】全体としては気体の流れが洗浄液槽外のＯ
Ｆ管内にて形成されるため、洗浄液槽２内の泡を吹き飛
ばして槽外へ泡を流出させたり泡吸引口から泡を遠ざけ
ることがなく、効果的に泡の吸引・消泡を行うことがで
きる。As a whole, the flow of gas is O
Since it is formed in the F tube, it is possible to effectively suck and defoam the bubbles without blowing out the bubbles in the cleaning liquid tank 2 and flowing the bubbles out of the tank or keeping the bubbles away from the bubble suction port. it can.
【００２０】[0020]
【実施例】鋼帯洗浄設備の洗浄液槽２内に発生した泡沫
１の消泡を、常温の空気を用い、図５に示されるよう
に、ＯＦ管降下開始水平断面４でのＯＦ管径ｄを１５０
ｍｍ，ガス吹き込みノズル６の口径ｅを３２ｍｍとし、
ノズル先端５の位置をＯＦ管降下開始水平断面４の上方
の高さｆを１５０ｍｍ，ＯＦ管３とガス抜き管８の連通
部分上端の位置を水平断面４の下方の高さｇを１０００
ｍｍとした装置によって行った。EXAMPLE As shown in FIG. 5, the defoaming of foam 1 generated in a cleaning liquid tank 2 of a steel strip cleaning equipment was performed by using air at room temperature, as shown in FIG. To 150
mm, the diameter e of the gas injection nozzle 6 is 32 mm,
The position of the nozzle tip 5 is set to a height f above the horizontal section 4 of the OF pipe descending start of 150 mm, and the upper end of the communicating portion between the OF pipe 3 and the vent pipe 8 is set to a height g below the horizontal section 4 of 1000.
mm.
【００２１】その結果、４３００Ｎリットル／ｍｉｎの
常温空気を圧入することにより、洗浄液槽２内に発生し
た泡沫１を５０リットル／ｍｉｎの速度で吸引・消泡す
ることができ、この結果従来泡沫の溢れだし等に伴って
捨てていた洗浄液１３を１００％回収し、作業環境の大
幅な改善を図ることができた。一般にはＯＦ管の径、ガ
ス吹き込み開口面積は、吹き込み気体の供給源の能力
（圧力、流量）、発泡速度、泡沫性状（泡沫の表面張
力）等によって決定される。As a result, the foam 1 generated in the cleaning liquid tank 2 can be sucked and defoamed at a rate of 50 liter / min by injecting a normal temperature air of 4300 N liter / min. The cleaning liquid 13 discarded due to overflow or the like was recovered 100%, and the working environment was significantly improved. In general, the diameter of the OF pipe and the area of the gas blowing opening are determined by the capacity (pressure and flow rate) of the supply source of the blowing gas, foaming speed, foam properties (surface tension of foam), and the like.
【００２２】ガスの噴き出し口形状は、図５中では単管
をそのまま用いた単孔型であるが、ノズル先端部５に図
６に示すようなノズルチップ１２を設けて、ガスの噴き
出し口形状を変更しても良い。図６中（ａ）は５孔シャ
ワー状，（ｂ）は多孔シャワー状，（ｃ）は環状多孔シ
ャワー状に、それぞれガス吹出を行う場合のノズルチッ
プを示している。なお、図６中１１はノズル開口部を示
している。The gas ejection port is a single hole type using a single tube as it is in FIG. 5, but the nozzle tip 12 as shown in FIG. May be changed. In FIG. 6, (a) shows a five-hole shower shape, (b) shows a perforated shower shape, and (c) shows an annular perforated shower shape. In FIG. 6, reference numeral 11 denotes a nozzle opening.
【００２３】ガス吹き込みノズル６より噴出させる気体
は、常温の空気を用いても良いが、泡沫内の気体の膨張
による破泡効率の向上を狙って高温（３００℃以下）の
気体を用いてもよい。The gas blown out from the gas injection nozzle 6 may be air at room temperature, or may be a high temperature gas (300 ° C. or lower) for the purpose of improving bubble breaking efficiency due to expansion of gas in the foam. Good.
【００２４】消泡後のガス中には破泡の際生じた微細な
液滴が混在するが、これを回収するにはガス抜き管８を
図１のように、ＯＦ管からの分岐後一旦上方に持ち上げ
てから降下させると良い。この場合、気体中の液滴の一
部はガス抜き管８の内壁に付着し、これが内壁伝いに降
下して回収される。又ＯＦ管からの分岐点にサイクロン
を設置して気液分離を行っても良い。The gas after defoaming contains fine droplets generated at the time of foam breakage. To collect the fine droplets, the gas venting pipe 8 is connected once after branching from the OF pipe as shown in FIG. It is better to lift up and then lower. In this case, a part of the liquid droplets in the gas adheres to the inner wall of the degassing pipe 8, and this drops down along the inner wall and is collected. Further, a gas-liquid separation may be performed by installing a cyclone at a branch point from the OF pipe.
【００２５】[0025]
【発明の効果】本発明によれば、簡単な構造によって効
果的に消泡することができる。According to the present invention, defoaming can be effectively performed with a simple structure.
【図１】本発明を例示する断面図である。FIG. 1 is a cross-sectional view illustrating the present invention.
【図２】消泡・回収機構を説明する断面図である。FIG. 2 is a cross-sectional view illustrating a defoaming / collecting mechanism.
【図３】ガス吹き込みノズル先端部位置とエジェクター
吸引力の関係を示すグラフである。FIG. 3 is a graph showing the relationship between the position of the tip of a gas blowing nozzle and the suction force of an ejector.
【図４】ガス抜き管位置と消泡能力の関係を示すグラフ
である。FIG. 4 is a graph showing the relationship between the position of a degassing pipe and the defoaming ability.
【図５】本発明の実施例を示す要部断面図である。FIG. 5 is a sectional view of a main part showing an embodiment of the present invention.
【図６】ガス吹き込みノズル形状の例を示した底面図
で、（ａ）は５孔型、（ｂ）は多孔型、（ｃ）は環状多
孔型である。FIGS. 6A and 6B are bottom views showing examples of the shape of a gas injection nozzle, wherein FIG. 6A is a five-hole type, FIG. 6B is a porous type, and FIG.
１ 泡沫 ２ 洗浄液槽 ３ ＯＦ管 ４ ＯＦ管降下開始水平断面 ５ ガス吹き込みノズル先端 ６ ガス吹き込みノズル ７ ＯＦ管下端 ８ ガス抜き配管 ９ ノズル噴流拡がり １０ 液化泡沫 １１ ノズル開口部 １２ ノズルチップ １３ 洗浄液 １４ 吹き込み気体 DESCRIPTION OF SYMBOLS 1 Foam 2 Cleaning liquid tank 3 OF pipe 4 OF pipe Start of descent horizontal cross section 5 Gas injection nozzle tip 6 Gas injection nozzle 7 OF pipe lower end 8 Gas vent pipe 9 Nozzle jet expansion 10 Liquefied foam 11 Nozzle opening 12 Nozzle tip 13 Cleaning liquid 14 Injection gas
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 19/02 B21B 45/02 C23G 1/36 C23G 3/02 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) B01D 19/02 B21B 45/02 C23G 1/36 C23G 3/02
Claims (1)
けたオーバーフロー管の下端を洗浄液槽下部に連通させ
た消泡装置において、該洗浄液槽の側面上部に設けたオ
ーバーフロー管が下降しはじめる水平断面を中心に、該
水平断面でのオーバーフロー管径をｄとして該水平断面
より上に２ｄ、下にｄの高さ範囲に先端が位置する、オ
ーバーフロー管内を下向きにガスを吹き込むノズルを有
し、且つ、オーバーフロー管の途中、該水平断面より３
ｄ以上下方にガス抜き管を有することを特徴とする鋼帯
洗浄設備の消泡装置。1. A cleaning liquid tank installed in a steel strip cleaning equipment at an upper part of a side surface thereof.
The lower end of the overflow pipe is connected to the lower part of the washing tank.
In the defoaming device, the overflow pipe provided at the upper part of the side surface of the cleaning liquid tank starts to descend, and the overflow pipe diameter at the horizontal section is d, 2d above the horizontal section, and d below the horizontal section. It has a nozzle that blows gas downward in the overflow pipe, the tip of which is located in the height range.
A defoaming device for a steel strip cleaning facility, characterized by having a degassing pipe below d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06232439A JP3107979B2 (en) | 1994-09-02 | 1994-09-02 | Defoaming equipment for steel strip cleaning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06232439A JP3107979B2 (en) | 1994-09-02 | 1994-09-02 | Defoaming equipment for steel strip cleaning equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0871305A JPH0871305A (en) | 1996-03-19 |
| JP3107979B2 true JP3107979B2 (en) | 2000-11-13 |
Family
ID=16939289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06232439A Expired - Lifetime JP3107979B2 (en) | 1994-09-02 | 1994-09-02 | Defoaming equipment for steel strip cleaning equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3107979B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100792751B1 (en) * | 2001-10-31 | 2008-01-11 | 주식회사 포스코 | Dust remove system of rod wire rolling mill |
| KR200487444Y1 (en) * | 2013-12-23 | 2018-09-17 | 주식회사 케이씨텍 | Bubble removal device for chamical tank |
| EP3463608B1 (en) * | 2016-05-24 | 2021-09-22 | Glencore Technology Pty Ltd. | Method for the de-aeration of froths and foams |
| CN107201528A (en) * | 2017-06-20 | 2017-09-26 | 邯钢集团邯宝钢铁有限公司 | A kind of cold rolling cleaning section alkali lye defoamer loading system and charging method |
| CN110075676A (en) * | 2019-05-27 | 2019-08-02 | 国电科学技术研究院有限公司 | A kind of foam collection crushing device of coal fired power plant wet method fume desulfurizing system |
-
1994
- 1994-09-02 JP JP06232439A patent/JP3107979B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0871305A (en) | 1996-03-19 |
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