JP3335006B2 - Cleaning method of metal strip - Google Patents
Cleaning method of metal stripInfo
- Publication number
- JP3335006B2 JP3335006B2 JP18713994A JP18713994A JP3335006B2 JP 3335006 B2 JP3335006 B2 JP 3335006B2 JP 18713994 A JP18713994 A JP 18713994A JP 18713994 A JP18713994 A JP 18713994A JP 3335006 B2 JP3335006 B2 JP 3335006B2
- Authority
- JP
- Japan
- Prior art keywords
- cleaning
- chamber
- metal strip
- pressure
- drying
- 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 - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/023—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by spraying
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning By Liquid Or Steam (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、鉄鋼あるいは非鉄金属
の圧延された帯板材に付着する油分や異物の脱脂および
洗浄方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for degreasing and cleaning oil and foreign matter adhering to a rolled strip of steel or non-ferrous metal.
【0002】[0002]
【従来の技術】圧延して得た金属帯材を二次加工したり
或いはそのまま製品化する際には、圧延工程で付着した
油脂類等の汚れを除去する必要がある。こうした金属帯
材を洗浄する方法として、洗浄室と乾燥室が直列して配
置される洗浄装置に金属帯材を連続的に導入して該金属
帯材を洗浄及び乾燥する方法が行われている。即ち、こ
の方法によれば、洗浄室において金属帯材は洗浄液中に
浸漬されるか、または洗浄液噴射ノズルからその両面に
洗浄液が吹き付けられて、表面に付着した油脂類等の汚
れが除去される。また、洗浄された金属帯材は、続いて
該洗浄室と直列して設置される乾燥室に搬入され、この
乾燥室内を走行する間に、その両面に熱風噴射ヘッダー
から熱風が吹き付けられて付着した洗浄液が乾燥され
る。こうした洗浄方法に用いられる洗浄液としては、油
脂類等の溶解力の高さから、トリクロロエタン、パーク
ロルエチレン、メチレンクロライド等の塩素系溶剤やア
ルカリ系洗剤もしくは中性洗剤の水溶液が用いられてい
る。2. Description of the Related Art When a metal strip obtained by rolling is subjected to secondary processing or to be directly commercialized, it is necessary to remove stains such as oils and fats adhered in a rolling step. As a method of cleaning such a metal strip, a method of continuously introducing the metal strip into a cleaning apparatus in which a cleaning chamber and a drying chamber are arranged in series and cleaning and drying the metal strip is performed. . That is, according to this method, the metal strip is immersed in the cleaning liquid in the cleaning chamber, or the cleaning liquid is sprayed from both sides of the metal liquid from the cleaning liquid jet nozzle, thereby removing dirt such as oils and fats attached to the surface. . Further, the cleaned metal strip is subsequently carried into a drying chamber installed in series with the cleaning chamber, and while traveling in the drying chamber, hot air is blown from a hot air jet header onto both sides thereof to adhere thereto. The washing liquid thus dried is dried. As a cleaning liquid used in such a cleaning method, an aqueous solution of a chlorinated solvent such as trichloroethane, perchlorethylene, methylene chloride, an alkali-based detergent or a neutral detergent is used because of its high dissolving power of oils and fats.
【0003】[0003]
【発明が解決しようとする課題】以上のような金属帯材
の洗浄方法において、地球環境保護の面から前記した塩
素系有機溶剤の使用が次第に規制されつつあり、アルカ
リ系洗剤や中性洗剤の使用も大量に発生する排水処理が
問題となっている。そこでこれらに代えてナフテン系、
パラフィン系、芳香族系の炭化水素系溶剤が洗浄液とし
て使用され始めている。炭化水素系溶剤は可燃性である
ため、これを用いて洗浄を行うには、洗浄室内に洗浄液
の噴霧体や蒸気が充満し、これらが放電着火により爆発
する危険性を回避する必要がある。そのため、こうした
洗浄処理では、洗浄室内を不燃化雰囲気に保つために、
通常、該洗浄室内に不活性ガスを導入し、酸素濃度を爆
発限界濃度以下とする策が講じられている。In the above-mentioned method for cleaning metal strips, the use of the above-mentioned chlorinated organic solvents has been gradually regulated from the viewpoint of protection of the global environment. Wastewater treatment, which occurs in large quantities, has become a problem. So instead of these, naphthenic,
Paraffinic and aromatic hydrocarbon solvents have begun to be used as cleaning liquids. Since the hydrocarbon-based solvent is flammable, it is necessary to avoid the danger of explosion due to discharge ignition when the cleaning chamber is filled with sprays or vapors of the cleaning liquid in order to perform cleaning using the hydrocarbon-based solvent. Therefore, in such a cleaning process, in order to maintain a non-combustible atmosphere in the cleaning chamber,
Usually, measures have been taken to introduce an inert gas into the cleaning chamber to reduce the oxygen concentration below the explosive limit concentration.
【0004】しかし、本発明者らがこの方法を追試した
ところ、洗浄室内に隣接する乾燥室から熱風が流入し該
熱風は一般的に清浄空気等が用いられているため、洗浄
室内の酸素濃度が上昇し洗浄室内を不燃化雰囲気に保つ
ことが困難となることがわかった。また、洗浄室内に流
入した熱風は洗浄室内の温度を上昇させて洗浄液の蒸発
量を増大させ、さらには蒸発した洗浄液の蒸気を同伴し
て洗浄室入口から排気されるため、洗浄液の損失量の増
加や周囲の環境汚染の原因となることもわかった。[0004] However, when the present inventors retested this method, it was found that hot air flows from a drying chamber adjacent to the cleaning chamber, and the hot air generally uses clean air or the like. It was found that it became difficult to keep the cleaning chamber in a non-combustible atmosphere. In addition, the hot air flowing into the cleaning chamber raises the temperature of the cleaning chamber to increase the evaporation amount of the cleaning liquid, and is further exhausted from the inlet of the cleaning chamber accompanied by the vapor of the cleaning liquid. It was also found that it caused an increase and pollution of the surrounding environment.
【0005】そこで本発明の目的は、炭化水素系溶剤の
ような難揮発性且つ可燃性の洗浄液を用いた金属帯材の
洗浄において、安全操業を確保し、洗浄液の損失を減ら
し、周囲の環境汚染を防止することである。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to secure safe operation, reduce the loss of the cleaning liquid, and reduce the surrounding environment when cleaning metal strips using a non-volatile and flammable cleaning liquid such as a hydrocarbon solvent. To prevent contamination.
【0006】[0006]
【課題を解決するための手段】本発明者らは、上記の目
的の下に難揮発性且つ可燃性の洗浄液を用いて金属帯材
を洗浄する方法について種々検討を加えた結果、洗浄室
内に不活性ガスを供給し、洗浄室と乾燥室の圧力を外圧
よりも高く維持し、さらに洗浄室と乾燥室との間を可及
的に気密に保持することによって、上記の目的を達成す
ることに成功し、本発明を提案するに至った。Means for Solving the Problems The present inventors have conducted various studies on a method of cleaning a metal strip using a non-volatile and flammable cleaning liquid for the above purpose, and as a result, have found that a method for cleaning a metal strip in a cleaning chamber is described. To achieve the above object by supplying an inert gas, maintaining the pressure in the cleaning chamber and the drying chamber higher than the external pressure, and maintaining the airtightness between the cleaning chamber and the drying chamber as much as possible. And succeeded in proposing the present invention.
【0007】即ち、本発明は、洗浄室において難揮発性
且つ可燃性の洗浄液(以下、単に洗浄液ともいう。)で
金属帯材を洗浄し、次いで乾燥室において金属帯材の乾
燥を行う金属帯材の洗浄方法において、洗浄室内に不活
性ガスを供給し、洗浄室と乾燥室の圧力を外圧よりも高
く維持し、さらに、洗浄室と乾燥室との間を可及的に気
密に保持することを特徴とする金属帯材の洗浄方法であ
る。That is, according to the present invention, a metal strip is cleaned in a cleaning chamber with a hardly volatile and flammable cleaning liquid (hereinafter, also simply referred to as a cleaning liquid), and then dried in a drying chamber. In the method of cleaning materials, an inert gas is supplied into the cleaning chamber, the pressure in the cleaning chamber and the drying chamber is maintained higher than the external pressure, and the space between the cleaning chamber and the drying chamber is kept as airtight as possible. This is a method for cleaning a metal strip.
【0008】本発明において用いられる洗浄液は、難揮
発性且つ可燃性であれば、公知の洗浄液を何ら制限なく
用い得る。本発明の方法では洗浄室及び乾燥室の圧力は
外圧よりも高く維持されるため、洗浄室や乾燥室内の洗
浄液の蒸気圧が高い場合には洗浄液の蒸気が装置外へ漏
洩する。したがって、洗浄液の蒸気の装置外への漏洩を
低く抑えるためには洗浄液の揮発性の程度は、常温での
蒸気圧が50mmHg以下、さらには10mmHg以下
であることが好ましい。因みに本発明で使用される洗浄
液の代表的なものである炭化水素系溶剤の蒸気圧は、常
温では数mmHgであるのに対し、塩素系溶剤のメチレ
ンクロライドでは20℃で約340mmHg、トリクロ
ロエタンで約110mmHgである。As the cleaning liquid used in the present invention, any known cleaning liquid can be used without any limitation as long as it is hardly volatile and flammable. In the method of the present invention, since the pressure in the cleaning chamber and the drying chamber is maintained higher than the external pressure, when the vapor pressure of the cleaning liquid in the cleaning chamber or the drying chamber is high, the vapor of the cleaning liquid leaks out of the apparatus. Accordingly, in order to suppress the leakage of the cleaning liquid vapor out of the apparatus, the degree of volatility of the cleaning liquid is preferably such that the vapor pressure at normal temperature is 50 mmHg or less, and more preferably 10 mmHg or less. Incidentally, the vapor pressure of a hydrocarbon-based solvent, which is a typical cleaning liquid used in the present invention, is several mmHg at room temperature, while the chlorine-based solvent methylene chloride has a vapor pressure of about 340 mmHg at 20 ° C. and trichloroethane has a It is 110 mmHg.
【0009】本発明において好適に用いられる洗浄液を
具体的に例示すると、ケロシン、デカン、ウンデカン、
ドデカン等を挙げることができる。Specific examples of the washing solution suitably used in the present invention include kerosene, decane, undecane,
Dodecane and the like can be mentioned.
【0010】洗浄室においては、洗浄液で金属帯材の洗
浄が行われる。金属帯材の洗浄は、通常は、洗浄液中に
金属帯材を浸漬するか、または、金属帯材の上下に設け
たノズルから金属帯材に向けて洗浄液を吹き付けること
によって行われる。洗浄室の温度は、洗浄液の揮発によ
る装置外への漏出および洗浄液の損失を防ぐために、一
般には常温であることが好ましい。[0010] In the cleaning room, the metal strip is cleaned with the cleaning liquid. The cleaning of the metal strip is usually performed by immersing the metal strip in the cleaning liquid or by spraying the cleaning liquid toward the metal strip from nozzles provided above and below the metal strip. Generally, the temperature of the cleaning chamber is preferably room temperature in order to prevent the cleaning liquid from leaking out of the apparatus due to volatilization of the cleaning liquid and losing the cleaning liquid.
【0011】洗浄室において洗浄された金属帯材は、次
いで乾燥室に送られて乾燥される。金属帯材の乾燥は、
通常は熱風を金属帯材に吹き付けることによって行われ
る。The metal strip cleaned in the cleaning room is then sent to a drying room and dried. Drying of metal strip
Usually, it is performed by blowing hot air onto the metal strip.
【0012】本発明においては、洗浄室に不活性ガスを
供給し、且つ洗浄室と乾燥室の圧力を外圧よりも高く維
持する必要がある。塩素系有機溶剤を使用する洗浄方法
においては、洗浄液が易揮発性であるため、機側環境の
維持に重点を置いて装置内を負圧に保つことが提唱され
ている。この方法を可燃性の洗浄液を使用する洗浄方法
に適用すると装置内への空気の侵入により洗浄室を不燃
性雰囲気に維持できないので、操業上極めて危険であ
る。本発明で使用される洗浄液の蒸気圧は塩素系有機溶
剤のそれに比べて格段に低く難揮発性であることから、
装置内を大気圧よりやや高い圧力としても機側環境への
影響はない。In the present invention, it is necessary to supply an inert gas to the cleaning chamber and to maintain the pressure in the cleaning chamber and the drying chamber higher than the external pressure. In a cleaning method using a chlorine-based organic solvent, since the cleaning liquid is easily volatile, it has been proposed to maintain a negative pressure in the apparatus with an emphasis on maintaining the machine side environment. If this method is applied to a cleaning method using a flammable cleaning liquid, the cleaning chamber cannot be maintained in a nonflammable atmosphere due to the intrusion of air into the apparatus, which is extremely dangerous in operation. Since the vapor pressure of the cleaning liquid used in the present invention is remarkably low in volatility as compared with that of the chlorine-based organic solvent,
Even if the pressure in the apparatus is slightly higher than the atmospheric pressure, there is no effect on the machine side environment.
【0013】洗浄室と乾燥室の圧力は、外圧(装置外の
圧力)よりもわずかに高く維持するだけで、装置外の雰
囲気が装置内へ流れ込むことによる爆発の危険性を回避
することができる。これら各室の圧力は、一般には0m
mAqを超えて10mmAqの範囲に維持されておれば
良い。さらに洗浄室の圧力を乾燥室の圧力よりも高くす
れば乾燥室内の雰囲気が洗浄室へ流れ込むことを防止す
ることができる。従って、この方法は本発明において好
適な実施態様である。この場合、洗浄室の圧力は、0m
mAqを超えて10mmAqの範囲に、乾燥室の圧力
は、0mmAqを超えて5mmAqの範囲から選ぶこと
が好ましい。[0013] By maintaining the pressure in the washing chamber and the drying chamber slightly higher than the external pressure (pressure outside the apparatus), it is possible to avoid the danger of explosion due to the atmosphere outside the apparatus flowing into the apparatus. . The pressure in each of these chambers is generally 0 m
What is necessary is that it is maintained in the range of 10 mmAq exceeding mAq. Further, if the pressure in the cleaning chamber is higher than the pressure in the drying chamber, it is possible to prevent the atmosphere in the drying chamber from flowing into the cleaning chamber. Therefore, this method is a preferred embodiment in the present invention. In this case, the pressure in the cleaning chamber is 0 m
It is preferable that the pressure in the drying chamber is selected from a range of more than 0 mmAq and 5 mmAq in a range of more than mAq to 10 mmAq.
【0014】洗浄室の圧力を外圧よりも高く維持する方
法は、不活性ガスを洗浄室に供給することによって行わ
れる。洗浄室内は、洗浄液の蒸気が存在するために爆発
限界に達しないようにするために不活性ガスの供給が必
要である。不活性ガスとしては、窒素ガス、ヘリウムガ
ス、アルゴンガス、ネオンガス等が挙げられるが、一般
には窒素ガスが用いられる。The method of maintaining the pressure in the cleaning chamber higher than the external pressure is performed by supplying an inert gas to the cleaning chamber. In order to prevent the explosion limit from being reached in the cleaning chamber due to the presence of cleaning liquid vapor, a supply of an inert gas is required. Examples of the inert gas include a nitrogen gas, a helium gas, an argon gas, a neon gas, and the like, and a nitrogen gas is generally used.
【0015】乾燥室の圧力を外圧よりも高く維持する方
法は、乾燥室への熱風吹込ブロワーと乾燥室からの排気
ブロワーをそれぞれ設置し、吹込み風量と排気風量を調
節する方法が好適である。As a method for maintaining the pressure in the drying chamber higher than the external pressure, it is preferable to install a hot air blower into the drying chamber and an exhaust blower from the drying chamber, and adjust the blowing air volume and the exhaust air volume. .
【0016】本発明で使用される洗浄液は難揮発性であ
り、沸点も高く(150〜200℃前後)、熱風のもつ
熱エネルギーだけでは容易に乾燥しない。このため、通
常は吹付け熱風を高速(50〜120m/sec)と
し、熱風のもつ速度エネルギーで金属帯材表面の付着液
を払拭し、微細化することにより蒸発速度を早くして乾
燥させることになる。すなわち、塩素系有機溶剤を使用
する場合に比べ、格段に大きな速度エネルギーを吹付け
熱風に与えることが必要である。このことは、乾燥室内
の気流の乱れが強くなることを意味し、この影響が洗浄
室に及べば室内の不燃化雰囲気が維持できないばかりで
なく、洗浄室からの洗浄液の損失を増加させることにな
る。The cleaning liquid used in the present invention is hardly volatile, has a high boiling point (about 150 to 200 ° C.), and cannot be easily dried only by the heat energy of hot air. For this reason, usually, the blowing hot air is set to a high speed (50 to 120 m / sec), and the liquid energy on the surface of the metal strip is wiped off by the speed energy of the hot air, and the evaporation speed is increased by making the metal band finer to dry the metal strip. become. In other words, it is necessary to apply a much larger velocity energy to the hot air as compared with the case where a chlorine-based organic solvent is used. This means that the turbulence of the air flow in the drying chamber becomes stronger, and if this influence reaches the cleaning room, not only the non-flammable atmosphere in the room cannot be maintained, but also the loss of the cleaning liquid from the cleaning room increases. become.
【0017】これを防止するために、洗浄室と乾燥室と
の間を可及的に気密に保持する必要がある。洗浄室と乾
燥室には、連続した金属帯材が走行しているために、こ
れらの間で完全に気密を保持することはできない。した
がって、本発明においては、乾燥室の雰囲気が洗浄室に
流れ込まないように、これら両室の間でできるだけ気密
が保持できればよい。例えば、これらの両室の間に緩衝
室を設け、緩衝室に走行する金属帯材を両側からはさみ
込むシールロールを設けることによって気密に保つ方法
が、本発明において好適に採用できる。この緩衝室によ
り、乾燥室で金属帯材に吹き付けられた熱風の一部が帯
材の表面に沿って洗浄室に流入することを防止し、乾燥
室と洗浄室との間の温度差に起因する対流気流の影響が
洗浄室に波及することを防止できる。In order to prevent this, it is necessary to keep the space between the washing chamber and the drying chamber as airtight as possible. Since a continuous metal strip is running in the washing room and the drying room, it is not possible to maintain a complete airtightness between them. Therefore, in the present invention, it is sufficient that the airtightness between the two chambers can be maintained as much as possible so that the atmosphere in the drying chamber does not flow into the cleaning chamber. For example, a method of providing a buffer chamber between these two chambers and providing a seal roll that sandwiches a metal band running in the buffer chamber from both sides to maintain airtightness can be suitably employed in the present invention. This buffer chamber prevents a part of the hot air blown to the metal strip in the drying chamber from flowing into the cleaning chamber along the surface of the strip, and is caused by a temperature difference between the drying chamber and the cleaning chamber. The influence of the convection airflow on the cleaning room can be prevented.
【0018】以下、本発明における洗浄方法で採用され
る代表的なフローを図面に従って説明する。Hereinafter, a typical flow employed in the cleaning method of the present invention will be described with reference to the drawings.
【0019】図1は、本発明による洗浄方法の代表的な
フローを示す概略図である。ここでは、洗浄液の保有量
を少なくして、危険物取扱い設備としての危険性を軽減
し、油分以外の付着異物の除去効果に優れるスプレー洗
浄方式について説明する。FIG. 1 is a schematic diagram showing a typical flow of a cleaning method according to the present invention. Here, a description will be given of a spray cleaning method in which the holding amount of the cleaning liquid is reduced, the danger as equipment for handling dangerous substances is reduced, and the effect of removing adhered foreign substances other than oil is excellent.
【0020】走行する金属帯材1は脱脂洗浄室2におい
て付着している油分及び異物を除去され仕上洗浄室3に
入る。脱脂洗浄室2から持ち込まれる微量の油分や極微
小の異物は仕上洗浄室3で洗い流される。仕上洗浄を経
た金属帯材は緩衝室4を通過して乾燥室5に入り熱風に
より乾燥される。洗浄槽は脱脂槽16と仕上洗浄槽21
がカスケードに配置されており、補給洗浄液は送液管2
6を通して仕上洗浄槽21に供給され、溢流して脱脂槽
16に入る。脱脂槽16の油分濃度の上昇を防ぐため、
循環洗浄液の一部は抜き出されて蒸留再生装置41へ送
られる。ここで、油分と除去された異物がスラッジとし
て排除された蒸留液は、仕上洗浄槽21へ送られ、脱脂
洗浄室2から持ち込まれる微量の汚染液を希釈した後、
溢流管25を経て脱脂槽16に流入する。The traveling metal strip 1 enters the finish cleaning chamber 3 after removing the oil and foreign matter adhering in the degreasing cleaning chamber 2. A minute amount of oil and extra-fine foreign matter brought in from the degreasing cleaning chamber 2 is washed away in the finishing cleaning chamber 3. The metal strip that has undergone the finish cleaning passes through the buffer chamber 4 and enters the drying chamber 5 where it is dried by hot air. The cleaning tank includes a degreasing tank 16 and a finish cleaning tank 21.
Are arranged in a cascade.
6 and is supplied to the finish washing tank 21 and overflows into the degreasing tank 16. In order to prevent the oil concentration in the degreasing tank 16 from increasing,
A part of the circulating washing liquid is withdrawn and sent to the distillation regeneration device 41. Here, the distillate from which the oil and the removed foreign matter have been removed as sludge is sent to the finish washing tank 21 to dilute a small amount of contaminated liquid brought in from the degreasing washing chamber 2.
It flows into the degreasing tank 16 through the overflow pipe 25.
【0021】脱脂洗浄室2及び仕上洗浄室3には、金属
帯材1の両面が洗浄できるように、それぞれスプレーノ
ズル群6及び7が配置されている。これらのノズル群か
ら洗浄液が噴射されるとき、それぞれの洗浄室内は洗浄
液の噴霧体及び蒸気が生成され、空気と混合して爆発性
の雰囲気を形成する。したがって、これを防止するため
に洗浄室に不活性ガスが導入される。この場合には、窒
素ガス発生装置39で発生させた窒素ガスを導管38に
より洗浄室2及び3に送入している。In the degreasing cleaning chamber 2 and the finishing cleaning chamber 3, spray nozzle groups 6 and 7 are arranged so that both surfaces of the metal strip 1 can be cleaned. When the cleaning liquid is sprayed from these nozzle groups, sprays and vapor of the cleaning liquid are generated in the respective cleaning chambers and mixed with air to form an explosive atmosphere. Therefore, an inert gas is introduced into the cleaning chamber to prevent this. In this case, the nitrogen gas generated by the nitrogen gas generator 39 is sent into the cleaning chambers 2 and 3 through the conduit 38.
【0022】金属帯材1は、このようにして不燃化され
た洗浄室で洗浄されたあと、緩衝室4を経て乾燥室5に
入る。乾燥室5には金属帯材1の両面に熱風を吹き付け
るためのブローノズル群8が設けられている。ブロー用
の空気は、送気ブロワー28により昇圧され空気加熱器
29により所定の温度まで加温された後、送気ダクト3
0を通してブローノズル群8に供給される。金属帯材1
に吹付けられた熱風は、金属帯材表面に付着している洗
浄液をその速度エネルギーで払拭し、微細化されたもの
を熱エネルギーにより蒸発させ乾燥させる。乾燥作用を
おえた熱風は、乾燥効率をよくするため排気ブロワー3
5によってすみやかに排気される。こうした乾燥工程に
おいては、吹付ける熱風の速度エネルギーと熱エネルギ
ーが乾燥効果を左右する。難揮発性(沸点が高く、蒸気
圧が低い)で粘性のある洗浄液を用いる場合は、特にそ
の速度エネルギーを塩素系溶剤やアルカリ系洗剤、中性
洗剤を使用する場合に比べ格段に大きくしなければなら
ない。その結果として、金属帯材1の表面に衝突した熱
風の一部が洗浄室に流入する量が増加することになるた
め、洗浄室内の不燃化雰囲気が維持できなくなり、安全
運転が継続できない。After the metal strip 1 has been washed in the non-combustible washing chamber, it enters the drying chamber 5 through the buffer chamber 4. The drying chamber 5 is provided with a blow nozzle group 8 for blowing hot air to both sides of the metal strip 1. The air for blowing is pressurized by an air blower 28 and heated to a predetermined temperature by an air heater 29.
0 is supplied to the blow nozzle group 8. Metal strip 1
The hot air blows the cleaning liquid adhering to the surface of the metal strip with its velocity energy, and evaporates and dries the micronized material by the heat energy. Exhaust blower 3 is used to improve the drying efficiency.
5 quickly exhausts. In such a drying step, the speed energy and the heat energy of the hot air blown affect the drying effect. When using a viscous cleaning liquid that is hardly volatile (having a high boiling point and low vapor pressure), its velocity energy must be significantly higher than when using a chlorine-based solvent, an alkaline-based detergent, or a neutral detergent. Must. As a result, the amount of hot air that has collided with the surface of the metal strip 1 and flows into the cleaning chamber increases, so that the non-combustible atmosphere in the cleaning chamber cannot be maintained, and safe driving cannot be continued.
【0023】こうした問題点を解決するため、本発明に
おいては、乾燥室5および洗浄室2及び3の内圧を大気
圧より若干高くして運転する。さらに、洗浄室圧力を乾
燥室圧力よりもやや高くすることが望ましい。このよう
な圧力平衡は、乾燥室5に対しては送気ブロワー吸入ダ
ンパー27と乾燥室排気ダンパー31の調整によって行
われ、洗浄室2及び3に対しては窒素発生装置39によ
る窒素発生量の調整によって達成される。In order to solve these problems, in the present invention, the drying chamber 5 and the cleaning chambers 2 and 3 are operated with the internal pressure slightly higher than the atmospheric pressure. Further, it is desirable that the pressure in the cleaning chamber be slightly higher than the pressure in the drying chamber. Such pressure equilibrium is performed by adjusting the air blower suction damper 27 and the drying chamber exhaust damper 31 for the drying chamber 5, and the nitrogen generation amount of the nitrogen generator 39 for the cleaning chambers 2 and 3. Achieved by adjustment.
【0024】さらに、本発明においては、洗浄室と乾燥
室とが可及的に気密に保持される。その具体的な方法と
して、洗浄室と乾燥室との間に少なくとも一組のシール
ロール11をもつ緩衝室4を設ける。さらに、この緩衝
室4により、乾燥室5からの流入熱風の遮断効果を向上
させるため、隔壁13及び14には、それぞれ邪魔板1
2をシールロールの表面にシールロールの回転に影響が
ない程度に密接して設ける。また、緩衝室4への金属帯
材1の入口には、仕上洗浄室3での付着液の絞りと緩衝
室4のシールを兼用する絞りロール10が設置される。Further, in the present invention, the cleaning chamber and the drying chamber are kept as airtight as possible. As a specific method, a buffer chamber 4 having at least one set of seal rolls 11 is provided between the washing chamber and the drying chamber. Further, in order to improve the blocking effect of the hot air flowing in from the drying chamber 5 by the buffer chamber 4, the partition walls 13 and 14 are provided with baffle plates 1 respectively.
2 is provided on the surface of the seal roll so closely as not to affect the rotation of the seal roll. At the entrance of the metal strip 1 into the buffer chamber 4, a squeezing roll 10 is installed, which also serves to squeeze the adhered liquid in the finishing washing chamber 3 and seal the buffer chamber 4.
【0025】洗浄室の圧力と乾燥室の圧力を大気圧より
高くし、上記に述べた構造の緩衝室を洗浄室と乾燥室の
間に介在させることによって、不活性ガスの送入によっ
て得られた洗浄室の不燃性の雰囲気は、洗浄室周囲から
の漏れ込み空気や乾燥室からの流入熱風及び洗浄室と乾
燥室間の温度差にもとづく対流から遮断され、爆発限界
酸素濃度以下に維持されるため、安全な運転を継続する
ことができる。The pressure in the cleaning chamber and the pressure in the drying chamber are set to be higher than the atmospheric pressure, and the buffer chamber having the above-described structure is interposed between the cleaning chamber and the drying chamber. The non-combustible atmosphere in the cleaning room is shut off from the air leaking from around the cleaning room, the hot air flowing from the drying room, and the convection due to the temperature difference between the cleaning room and the drying room. Therefore, safe driving can be continued.
【0026】洗浄室に送入された窒素ガスは洗浄室入口
排気管32より、また、乾燥室からの流出熱風は乾燥室
出口排気管33より排気ブロワー35によって排気され
る。The nitrogen gas sent into the cleaning chamber is exhausted from an exhaust pipe 32 at the inlet of the cleaning chamber, and the hot air flowing out of the drying chamber is exhausted from an exhaust pipe 33 at the outlet of the drying chamber by an exhaust blower 35.
【0027】[0027]
【発明の効果】本発明によれば、洗浄室の不燃性雰囲気
が維持されるので、安全な洗浄処理運転を継続できる。
また、乾燥室から洗浄室への流入熱風を遮断することに
より、洗浄室における過剰の洗浄液の蒸発発生を防止
し、洗浄液が洗浄室の外へ余分に持ち出されることを防
ぐことができるため、洗浄液の消費量を低減できる。さ
らに本発明によれば、乾燥室における高速ブローが可能
なため、乾燥効果が高く乾燥に必要なスペースを節約で
きる。また、緩衝室を複数設置すれば金属帯材の高速洗
浄処理が可能となる。According to the present invention, the non-flammable atmosphere of the cleaning chamber is maintained, so that the safe cleaning operation can be continued.
Also, by shutting off the hot air flowing from the drying chamber to the cleaning chamber, it is possible to prevent evaporation of excessive cleaning liquid in the cleaning chamber and prevent the cleaning liquid from being taken out of the cleaning chamber excessively. Consumption can be reduced. Further, according to the present invention, since high-speed blowing in the drying chamber is possible, the drying effect is high and the space required for drying can be saved. In addition, if a plurality of buffer chambers are provided, high-speed cleaning of the metal strip can be performed.
【0028】[0028]
【実施例】以下に本発明を具体的に説明するために、実
施例を示すが、本発明はこれら実施例に制限されるもの
ではない。EXAMPLES The present invention will be described below in more detail with reference to examples, but the present invention is not limited to these examples.
【0029】実施例1 図1に示した洗浄装置を用いて巾200mm×厚0.0
5mmの銅合金圧延帯材の洗浄を行った。洗浄条件は下
記の通りとした。Example 1 Using the cleaning apparatus shown in FIG.
The 5 mm copper alloy rolled strip was washed. The washing conditions were as follows.
【0030】 ・銅合金圧延帯材の走行速度:60m/min ・洗浄液:炭化水素系溶剤(常温での蒸気圧:数mmH
g) ・洗浄液温:30℃ ・洗浄液のスプレー圧力:1.0kg/cm2 ・スプレー流量:50l/min ・乾燥用熱風温度:70℃ ・熱風噴射速度:80m/sec ・窒素ガス送入量:120l/min ・窒素ガス濃度:97% ・乾燥室長さ:1,000mm ・洗浄室長さ:1,500mm 洗浄室圧力を2mmAq、乾燥室圧力を1.5mmAq
に維持したとき、洗浄室酸素濃度は窒素ガス送入開始後
18分で10%となり、洗浄液の蒸気と酸素の組成を爆
発限界からはずすことができた。また、洗浄装置外への
洗浄液の漏洩はほとんどなかった。-Running speed of rolled copper alloy strip: 60 m / min-Cleaning liquid: hydrocarbon solvent (vapor pressure at normal temperature: several mmH)
g) ・ Cleaning liquid temperature: 30 ° C. ・ Spray pressure of the cleaning liquid: 1.0 kg / cm 2・ Spray flow rate: 50 l / min ・ Hot air temperature for drying: 70 ° C. ・ Hot air blowing speed: 80 m / sec ・ Nitrogen gas supply amount: 120 l / min ・ Nitrogen gas concentration: 97% ・ Drying chamber length: 1,000 mm ・ Washing chamber length: 1,500 mm Washing chamber pressure 2 mmAq, drying chamber pressure 1.5 mmAq
, The oxygen concentration in the cleaning chamber became 10% 18 minutes after the start of the supply of nitrogen gas, and the composition of the vapor and oxygen of the cleaning liquid could be removed from the explosion limit. Further, there was almost no leakage of the cleaning liquid outside the cleaning device.
【0031】比較として洗浄室圧力を−(2〜3)mm
Aq、乾燥室圧力を−5mmAqとした場合、洗浄室内
の酸素濃度は20%以下にはできなかった。For comparison, the pressure in the cleaning chamber was set to-(2-3) mm.
When Aq and the drying chamber pressure were set to -5 mmAq, the oxygen concentration in the cleaning chamber could not be reduced to 20% or less.
【図1】図1は、本発明の洗浄方法の代表的なフローを
示す概略図である。FIG. 1 is a schematic diagram showing a typical flow of a cleaning method of the present invention.
1 金属帯材 2 脱脂洗浄室 3 仕上洗浄室 4 緩衝室 5 乾燥室 16 脱脂槽 21 仕上洗浄槽 28 送気ブロワー 35 排気ブロワー 39 窒素発生装置 DESCRIPTION OF SYMBOLS 1 Metal strip 2 Degreasing washing room 3 Finish washing room 4 Buffer room 5 Drying room 16 Degreasing tank 21 Finish washing tank 28 Air supply blower 35 Exhaust blower 39 Nitrogen generator
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特公 昭60−40510(JP,B2) 特公 昭60−40511(JP,B2) 特公 昭58−28353(JP,B2) 特許3095592(JP,B2) 特許3218264(JP,B2) (58)調査した分野(Int.Cl.7,DB名) B08B 3/00 - 3/14 C23G 1/00 - 5/06 B21B 45/02 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-B-60-40510 (JP, B2) JP-B-60-40511 (JP, B2) JP-B-58-28353 (JP, B2) Patent 3095592 (JP, B2) B2) Patent 3218264 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) B08B 3/00-3/14 C23G 1/00-5/06 B21B 45/02
Claims (1)
液で金属帯材を洗浄し、次いで乾燥室において金属帯材
の乾燥を行う金属帯材の洗浄方法において、洗浄室内に
不活性ガスを供給し、洗浄室と乾燥室の圧力を外圧より
も高く維持し、さらに洗浄室と乾燥室との間を可及的に
気密に保持することを特徴とする金属帯材の洗浄方法。In a method for cleaning a metal strip in a cleaning chamber, the metal strip is cleaned with a non-volatile and flammable cleaning liquid, and then the metal strip is dried in a drying chamber. A method for cleaning a metal strip, comprising supplying, maintaining the pressure in a cleaning chamber and a drying chamber higher than an external pressure, and maintaining the airtightness between the cleaning chamber and the drying chamber as much as possible.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18713994A JP3335006B2 (en) | 1994-08-09 | 1994-08-09 | Cleaning method of metal strip |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18713994A JP3335006B2 (en) | 1994-08-09 | 1994-08-09 | Cleaning method of metal strip |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0853787A JPH0853787A (en) | 1996-02-27 |
JP3335006B2 true JP3335006B2 (en) | 2002-10-15 |
Family
ID=16200812
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18713994A Expired - Fee Related JP3335006B2 (en) | 1994-08-09 | 1994-08-09 | Cleaning method of metal strip |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3335006B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101374609A (en) * | 2006-03-20 | 2009-02-25 | 高桥金属株式会社 | Cleaning device using water-based cleaning liquid |
CN101914778B (en) * | 2010-08-11 | 2012-01-25 | 昆明理工大学 | Microwave heating device for heating cold-rolling pickling process medium |
CN101935845B (en) * | 2010-08-19 | 2012-07-11 | 昆明理工大学 | Method for heating titanium strip cleaning acid liquor by using microwave heater |
-
1994
- 1994-08-09 JP JP18713994A patent/JP3335006B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0853787A (en) | 1996-02-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH0969509A (en) | Cleaning/etching/drying system for semiconductor wafer and using method thereof | |
TWM564486U (en) | Supercritical-state cleaning system | |
JPH03140485A (en) | Method and device for degreasing and washing | |
GB2113719A (en) | Solvent recovery and regeneration in washing operation | |
JP3335006B2 (en) | Cleaning method of metal strip | |
JP3402790B2 (en) | Cleaning method of metal strip | |
EP0755567B1 (en) | Crt electron gun cleaning using carbon dioxide snow | |
JP2996236B1 (en) | Substrate processing equipment | |
JP3044381B2 (en) | Article cleaning method and apparatus | |
JPS6040510B2 (en) | Washing and drying method | |
JPH0655114A (en) | Cleaning apparatus and cleaning method | |
JPH03137977A (en) | Washing apparatus | |
JP3095592B2 (en) | Metal strip cleaning method | |
JP2000233216A (en) | Steel cleaning and drying method | |
JP3337565B2 (en) | Metal strip cleaning equipment | |
JP4167720B2 (en) | Solvent washer | |
JP2014133234A (en) | Method for removing deposit, and apparatus for removing deposit used therefor | |
KR20100103120A (en) | Treating apparatus using high-pressure treating device and recycle method for the high-pressure treating device | |
JP3256593B2 (en) | Continuous body degreasing equipment | |
JPS5828353B2 (en) | Metal strip cleaning method and device | |
JPH07113191A (en) | Washing device | |
JPH08283973A (en) | Cleaning method of traveling material to be cleaned | |
JPS6140038B2 (en) | ||
JPS6040511B2 (en) | Method for cleaning and drying metal strips | |
KR101189653B1 (en) | Apparatus and method by plasma for removing metal-processing oil |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090802 Year of fee payment: 7 |
|
LAPS | Cancellation because of no payment of annual fees |