JPS6140038B2 - - Google Patents
Info
- Publication number
- JPS6140038B2 JPS6140038B2 JP1190281A JP1190281A JPS6140038B2 JP S6140038 B2 JPS6140038 B2 JP S6140038B2 JP 1190281 A JP1190281 A JP 1190281A JP 1190281 A JP1190281 A JP 1190281A JP S6140038 B2 JPS6140038 B2 JP S6140038B2
- Authority
- JP
- Japan
- Prior art keywords
- solvent
- metal strip
- cleaning
- cleaning chamber
- chamber
- 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
Links
- 239000002904 solvent Substances 0.000 claims description 99
- 229910052751 metal Inorganic materials 0.000 claims description 87
- 239000002184 metal Substances 0.000 claims description 87
- 238000004140 cleaning Methods 0.000 claims description 86
- 238000001035 drying Methods 0.000 claims description 46
- 239000007921 spray Substances 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 26
- 238000005238 degreasing Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 230000008929 regeneration Effects 0.000 claims description 14
- 238000011069 regeneration method Methods 0.000 claims description 14
- 238000004821 distillation Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000007602 hot air drying Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 77
- 239000000243 solution Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000011282 treatment Methods 0.000 description 6
- 230000001172 regenerating effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000935 solvent evaporation Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 235000014593 oils and fats Nutrition 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- MLPZIWQFKYETHE-UHFFFAOYSA-N chlorosyloxymethyl chlorite Chemical compound O=ClOCOCl=O MLPZIWQFKYETHE-UHFFFAOYSA-N 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229950011008 tetrachloroethylene Drugs 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
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 And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
【発明の詳細な説明】
この発明は圧延等の過程で金属帯材料に付着し
た油脂類を洗浄して除去するための金属帯の連続
脱脂方法及び同装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for continuous degreasing of a metal strip for cleaning and removing oils and fats adhering to the material of the metal strip during rolling or other processes.
従来よりいわゆる走行金属帯の油脂類の除去に
はアルカリ洗浄、溶剤洗浄等の脱脂処理が行わ
れ、スケールの除去には酸洗処理が行われてい
る。アルカリ洗浄はアルカリ希釈液で洗浄後水洗
浄あるいは中和処理して乾燥するが、高速で連続
的に脱脂処理を行う場合十分な脱脂処理が出来な
いため洗浄部を長くする必要があつた。また、ア
ルカリ洗浄では走行金属帯表面に疵が発生するば
かりでなく、スラツジが発生するためその処理設
備費もかかり、さらに高速洗浄の場合処理液の残
留などで被処理物の表面にスマツト等が付着し変
色するという不具合がある。 Conventionally, degreasing treatments such as alkali cleaning and solvent cleaning have been used to remove oils and fats from so-called running metal bands, and pickling treatments have been used to remove scale. In alkaline cleaning, after washing with a diluted alkali solution, the product is washed with water or neutralized and then dried, but when degreasing is performed continuously at high speed, sufficient degreasing cannot be achieved, so it is necessary to lengthen the cleaning section. In addition, alkaline cleaning not only causes scratches on the surface of the running metal strip, but also generates sludge, which increases the cost of processing equipment.Furthermore, in the case of high-speed cleaning, residual processing liquid causes smut etc. on the surface of the workpiece. There is a problem that it sticks and discolors.
さらに、溶剤による洗浄方法があるが、これは
加熱した溶剤の蒸気を冷却材で凝縮したものを走
行金属帯に吹き付けたり、洗浄室内の凝縮溶剤液
中に走行金属帯を連続的に浸漬する等により脱脂
処理して、表面に付着した溶剤を蒸発乾燥等によ
り除去するいわゆる溶剤蒸気法、溶剤スプレイ
法、溶剤浸漬法がある。この場合はアルカリ洗浄
の如く走行金属帯表面に疵やスラツジが発生した
り、スマツト等が付着して変色するという欠点は
ないが、やはり高速で金属帯を走行させると脱脂
洗浄が不十分となるため洗浄部を長くしなければ
ならず設備費が高くなる。 Furthermore, there are cleaning methods using solvents, such as spraying heated solvent vapor condensed with a coolant onto the running metal strip, or continuously immersing the running metal strip in a condensed solvent solution in a cleaning chamber. There are so-called solvent vapor methods, solvent spray methods, and solvent immersion methods in which the surface is degreased and the solvent adhering to the surface is removed by evaporation drying or the like. In this case, unlike alkaline cleaning, there are no drawbacks such as scratches or sludge on the surface of the running metal strip, or discoloration due to adhesion of smut, etc., but if the metal strip is run at high speed, degreasing and cleaning will be insufficient. Therefore, the cleaning section must be made longer, which increases equipment costs.
また、溶剤洗浄室から有害な溶剤ガスが漏洩す
るため特公昭40−9724号公報所載の如く溶剤ガス
を水冷噴射により液化して水分を分離して溶剤を
回収再生使用したり、実公昭55−24136号公報所
載の如く溶剤ガスを凝縮して蒸留分離した溶剤を
回収使用する等溶剤ガスの漏洩防止と回収対策が
必要となるが、洗浄室の金属帯出入口から溶剤ガ
スの漏洩や金属帯表面に付着した溶剤が室外に出
るもので完全に防ぐことは難かしく、たとえ洗浄
室に乾燥室を連設して金属帯に付着した溶剤を蒸
発乾燥することが行われても、乾燥室の金属帯出
口から溶剤ガスの漏洩は避けられず、特に金属帯
を高速により連続脱脂処理する場合その漏洩は著
しくなる。 In addition, since harmful solvent gas leaks from the solvent cleaning chamber, as described in Japanese Patent Publication No. 1972-9724, the solvent gas is liquefied by water-cooled injection, water is separated, and the solvent is recovered and reused. - As described in Publication No. 24136, it is necessary to take measures to prevent and recover solvent gas, such as collecting and using the solvent that has been condensed and separated by distillation. It is difficult to completely prevent the solvent adhering to the surface of the metal band from leaking outside, and even if a drying room is installed next to the cleaning room to evaporate and dry the solvent adhering to the metal band, the drying room Leakage of solvent gas from the outlet of the metal strip is unavoidable, and the leakage becomes particularly significant when the metal strip is continuously degreased at high speed.
一方、酸洗スケール除去処理後やアルカリ洗浄
脱脂処理後の水洗浄に既に適用されてにるカスケ
ード洗浄法を溶剤洗浄脱脂処理に適用した場合、
その洗浄効果はほぼ満足できるものの、溶剤ガス
の発生が激しくガス洩れを生じ金属帯に付着した
溶剤をリンガロール等で払拭してもなお残留する
ため洗浄室に連設した乾燥室で乾燥する必要があ
り、また蒸発した溶剤ガスは乾燥室の走行金属帯
出口から漏洩する。そのガス洩れ対策として、洗
浄室や乾燥室の金属帯出入口をフエルトを介する
などして密封することが考えられるが、その金属
帯出入口には何分にも金属帯を高速で走行させる
必要上十分な隙間が設けられており、確実にガス
洩れを防ぐことは極めて困難である。 On the other hand, if the cascade cleaning method, which has already been applied to water cleaning after pickling scale removal treatment or alkaline cleaning degreasing treatment, is applied to solvent cleaning degreasing treatment,
Although the cleaning effect is almost satisfactory, the generation of solvent gas causes gas leakage, and even if the solvent adhered to the metal strip is wiped off with a ring roll, etc., it still remains, so it is necessary to dry it in a drying room connected to the cleaning room. The evaporated solvent gas leaks from the outlet of the running metal strip in the drying chamber. As a countermeasure against gas leakage, it may be possible to seal the metal strip entrances and exits of the cleaning room and drying room with felt, but this is not enough since the metal strip entrances and exits need to be run at high speed for many minutes. There are large gaps, making it extremely difficult to reliably prevent gas leaks.
このように金属帯の溶剤による洗浄脱脂処理は
溶剤や溶剤ガスの漏洩が著しく、比較的高価な溶
剤のロスは経済的損失を招き、また有害物質であ
る溶剤の拡散は環境汚染という公害問題を惹起す
るという問題点を有している。 In this way, when cleaning and degreasing metal strips with solvents, there is a significant leakage of solvent and solvent gas, and the loss of relatively expensive solvents causes economic losses, and the diffusion of hazardous solvents causes environmental pollution. It has the problem of causing
この発明は上述の如き従来の走行金属帯の連続
脱脂装置の問題点を解消するためになされたもの
である。 This invention has been made in order to solve the problems of the conventional continuous degreasing apparatus for running metal strips as described above.
すなわち、金属帯を溶剤のスプレーまたはシヤ
ワー中で走行させて連続的に脱脂洗浄し、ついで
乾燥させるにあたり前記金属帯を少なくとも1個
の洗浄室を通して洗浄するとともに、付着した溶
剤を各洗浄室出側で拭取したのち熱風乾燥室に導
く一方、洗浄に使用後蒸留処理された溶剤の再生
液と補充溶剤の新液とを金属帯出側端の洗浄室か
ら供給して該洗浄室における金属帯の洗浄に供し
たのち金属帯入側に向けてカスケード流下させて
蒸留再生装置に導くとともに、前記金属帯出側端
の洗浄室を除く各洗浄室での洗浄にはカスケード
流下中の溶剤を使用し、また各洗浄室及び前記乾
燥室内に生じた溶剤ガスを回収液化して前記溶剤
の補充用剤の新液と共に使用するようにしたもの
である。 That is, the metal strip is continuously degreased and cleaned by running it in a solvent spray or shower, and then when it is dried, the metal strip is cleaned through at least one cleaning chamber, and the adhering solvent is removed from the outlet of each cleaning chamber. After wiping the metal strip, it is introduced into a hot air drying chamber, while a regenerated solution of the distilled solvent used for cleaning and a new solution of replenishment solvent are supplied from the cleaning chamber at the end of the metal strip outlet side to dry the metal strip in the cleaning chamber. After being subjected to cleaning, the solvent is allowed to flow down the cascade toward the metal strip input side and guided to the distillation regeneration device, and the solvent flowing down the cascade is used for cleaning in each cleaning chamber except the cleaning chamber at the end of the metal strip outlet side. Further, the solvent gas generated in each washing chamber and the drying chamber is recovered and liquefied and used together with the fresh solution of the solvent replenisher.
また、金属帯を溶剤のスプレーまたはシヤワー
中で走行させて連続的に脱脂洗浄し、ついで乾燥
させる装置において前記金属帯の走行方向に沿つ
て連設された複数の洗浄室と該洗浄室に連通した
乾燥室と、前記洗浄室内に設けられたスプレーま
たはシヤワーノズル及び各洗浄室出側に設けられ
たリンガーロールと、前記洗浄室の下部において
金属帯の走行方向と逆方向に向けて各洗浄室ごと
に設置されたカスケードタンクと、金属帯の入側
端洗浄室に対応する前記カスケードタンクより溶
剤蒸留再生装置を経て金属帯出側洗浄室内のスプ
レーまたはシヤワーノズルに連結された溶剤再生
液供給管と、該スプレーまたはシヤワーノズルに
連結された溶剤新液補充管と、金属帯出側端洗浄
室を除いた洗浄室におけるスプレーまたはシヤワ
ーノズルと前記カスケードタンクとを結ぶ溶剤循
環管と、前記洗浄室及び乾燥室より溶剤ガス液化
処理装置及び再生液貯蔵タンクを経て前記溶剤再
生液供給管に至る管路とからなるものである。 Further, in an apparatus for continuously degreasing and cleaning a metal strip by running it in a solvent spray or shower, and then drying the metal strip, the washing chamber is communicated with a plurality of washing chambers arranged in series along the running direction of the metal strip. a drying chamber, a spray or shower nozzle installed in the cleaning chamber, a ringer roll installed at the exit side of each cleaning chamber, and a drying chamber installed in the lower part of the cleaning chamber in the opposite direction to the running direction of the metal strip. a cascade tank installed at each side, and a solvent regeneration liquid supply pipe connected from the cascade tank corresponding to the metal strip inlet end cleaning chamber to a spray or shower nozzle in the metal strip outlet side cleaning chamber via a solvent distillation regeneration device. , a new solvent replenishment pipe connected to the spray or shower nozzle, a solvent circulation pipe connecting the spray or shower nozzle and the cascade tank in the cleaning chamber excluding the metal strip exit end cleaning chamber, and the cleaning chamber and drying It consists of a pipe line leading from the chamber, through the solvent gas liquefaction processing device and the regenerating liquid storage tank, to the solvent regenerating liquid supply pipe.
図面に基いてこの発明の実施態様を説明する。 Embodiments of the present invention will be described based on the drawings.
金属帯1の走行方向(矢印A)に沿つて複数の
洗浄室2a,2b,2c,2dが連設され、該洗
浄室2dに乾燥室3が連通して設けられている。 A plurality of cleaning chambers 2a, 2b, 2c, and 2d are arranged in series along the traveling direction (arrow A) of the metal strip 1, and a drying chamber 3 is provided in communication with the cleaning chamber 2d.
各洗浄室2a,2b,2c,2dの下部にはそ
れぞれカスケードタンク4が金属帯1の走行方向
と逆方向に向けて低下設置されている。 A cascade tank 4 is lowered in the lower part of each of the cleaning chambers 2a, 2b, 2c, and 2d in a direction opposite to the running direction of the metal strip 1.
各洗浄室内には走行する金属帯1の上下面それ
ぞれに向けて複数個の循環液用スプレーまたはシ
ヤワーノズル5が配設されると共に出側に金属帯
1を払拭するためのリンガーロール6が設けられ
ている。 In each cleaning chamber, a plurality of spray or shower nozzles 5 for circulating fluid are disposed toward the upper and lower surfaces of the running metal strip 1, respectively, and a ringer roll 6 for wiping off the metal strip 1 is provided on the exit side. It is being
また、各洗浄室には前記スプレーノズル5にカ
スケードタンク4からスプレーポンプ7を介して
導かれた溶剤循環管8が配設されている。 Further, in each cleaning chamber, a solvent circulation pipe 8 is provided which is led from the cascade tank 4 to the spray nozzle 5 via a spray pump 7.
金属帯1の入側端洗浄室2aに対応するカスケ
ードタンク4からは溶剤再生液供給管9が蒸留原
液ポンプ10を介し溶剤蒸留再生装置11等を経
て金属帯1の出側端洗浄室2dに設けられた再生
液新液用スプレーまたはシヤワーノズル12に導
かれるように配設されている。 From the cascade tank 4 corresponding to the inlet end cleaning chamber 2a of the metal strip 1, a solvent regeneration liquid supply pipe 9 is passed through a distillation stock pump 10, a solvent distillation regeneration device 11, etc., and then to the outlet end cleaning chamber 2d of the metal strip 1. The regenerating liquid is arranged so as to be guided to a new liquid spray or shower nozzle 12 provided therein.
上記溶剤蒸留再生装置11等は蒸留器13、冷
凍機14、蒸留器デカンタ15、廃液タンク16
及び再生液貯蔵タンク17より構成されている。
なお、18は廃液ポンプ、19は再生液ポンプ、
20はオーバーフロー配管である。 The solvent distillation regeneration device 11 and the like include a distiller 13, a refrigerator 14, a distiller decanter 15, and a waste liquid tank 16.
and a regeneration liquid storage tank 17.
In addition, 18 is a waste liquid pump, 19 is a regeneration liquid pump,
20 is an overflow pipe.
21は溶剤新液補充管で、受入タンク22から
補給ポンプ23を介して前記洗浄室2d内のスプ
レーまたはシヤワーノズル12まで導かれ、つま
り前記溶剤再生液供給管9に合流する如く配設さ
れている。 Reference numeral 21 denotes a new solvent replenishment pipe, which is led from the receiving tank 22 via the replenishment pump 23 to the spray or shower nozzle 12 in the cleaning chamber 2d, that is, arranged so as to join the solvent regeneration liquid supply pipe 9. There is.
24は溶剤ガス液化処理装置で、気密にされた
洗浄室2a,2b,2c,2d及び乾燥室3にそ
れぞれガス用管路25を回収ブロワ26を介して
配設すると共に一次クーラー27、二次クーラー
28、深冷クーラー29及び水分離槽30を設け
ている。 Reference numeral 24 denotes a solvent gas liquefaction processing apparatus, in which gas pipes 25 are arranged in the airtight cleaning chambers 2a, 2b, 2c, 2d and the drying chamber 3 via a recovery blower 26, and a primary cooler 27, a secondary A cooler 28, a deep cooling cooler 29, and a water separation tank 30 are provided.
乾燥室3には走行する金属帯1の上下面それぞ
れに向けて複数個のガスノズル31が配設される
と共に、該ガスノズルにガス還流管32がフアン
33及び加熱器34と共に接続されている。 A plurality of gas nozzles 31 are arranged in the drying chamber 3 so as to face each of the upper and lower surfaces of the running metal strip 1, and a gas reflux pipe 32 is connected to the gas nozzles together with a fan 33 and a heater 34.
金属帯1の入側端洗浄室2a及び出側端乾燥室
3にそれぞれ設けたガス遮断ボツクス35にガス
吸引管36が排気フアン37と共に接続されてい
る。 A gas suction pipe 36 and an exhaust fan 37 are connected to gas cutoff boxes 35 provided in the inlet end cleaning chamber 2a and the outlet end drying chamber 3 of the metal strip 1, respectively.
しかして、連続的に走行する金属帯1は各洗浄
室2a,2b,2c,2d内で循環液用スプレー
ノズル5から噴射れた溶剤により繰返し洗浄され
ると共にリンガーロール6により表面を払拭され
る。一方、各洗浄室2a,2b,2c,2dから
各カスケードタンク4に流入した溶剤はカスケー
ド流下して溶剤再生液供給管9により蒸留器1
3、蒸留器デカンタ15へ送られて再生液とな
る。 Thus, the continuously running metal strip 1 is repeatedly cleaned by the solvent sprayed from the circulating fluid spray nozzle 5 in each of the cleaning chambers 2a, 2b, 2c, and 2d, and its surface is wiped off by the ringer roll 6. . On the other hand, the solvent flowing into each cascade tank 4 from each cleaning chamber 2a, 2b, 2c, 2d flows down the cascade and is transferred to the distiller 1 by the solvent regeneration liquid supply pipe 9.
3. It is sent to the distiller decanter 15 and becomes a regenerated liquid.
再生液は別途溶剤新液補充管21により送られ
た補充用新液と共に貯蔵タンク17に貯えられた
後金属帯1の出側端洗浄室2dの再生液新液用ス
プレーノズル12から噴射されて金属帯1を洗浄
脱脂する。 The regenerating liquid is stored in a storage tank 17 together with a new replenishing liquid sent separately through a new solvent replenishment pipe 21, and then sprayed from a new regenerating liquid spray nozzle 12 in a cleaning chamber 2d at the outlet end of the metal strip 1. The metal band 1 is cleaned and degreased.
さらに、金属帯1は乾燥室3内で表面に残留付
着している溶剤をガスノズル31から吹付けられ
ら乾燥ガスによつて乾燥除去される。 Further, the metal strip 1 is dried and removed by a drying gas which is sprayed from a gas nozzle 31 to remove the solvent remaining on the surface of the metal strip 1 in the drying chamber 3.
このとき、各洗浄室及び乾燥室3内には有害な
溶剤ガスが発生するが、溶剤ガス液化処理装置2
4の働きで各室内は負圧に保持されると共に溶剤
ガスは室外に吸引され液化されて貯蔵タンク7内
に回収される。 At this time, harmful solvent gas is generated in each cleaning chamber and drying chamber 3, but the solvent gas liquefaction processing equipment 2
4 maintains a negative pressure inside each chamber, and the solvent gas is sucked outside, liquefied, and recovered in the storage tank 7.
また、乾燥室3内は多量の溶剤ガスが発生しか
つ高温のためガス圧力が高いので、洗浄室2dへ
ガスが流入するのを抑止するため両室間に仕切板
を設けることが望ましい。 Further, since a large amount of solvent gas is generated in the drying chamber 3 and the gas pressure is high due to the high temperature, it is desirable to provide a partition plate between the two chambers to prevent gas from flowing into the cleaning chamber 2d.
乾燥室3において金属帯1に付着した溶剤を蒸
発除去する方法として、(1)乾燥室3雰囲気の例え
ば高周波による直接加熱、(2)乾燥室3雰囲気の例
えば蒸気、燃焼ガスによる間接加熱、(3)不活性ガ
ス、窒素ガス等の加熱ガスを外部より乾燥室3に
送給する方法、(4)乾燥室3に内部ガスを還流加熱
して送給する方法等が考えられる。上述の(1)及び
(2)については加熱された雰囲気ガスが金属帯1の
表面に接触して溶剤を蒸発させるものであるか
ら、金属帯1の走行速度の上昇に追従した雰囲気
ガス温度の調節が困難となるし、加熱費用もかさ
むという問題がある。(3)については外部からガス
が余分に乾燥室3に入るため、送給されたガス量
だけ再び排出する必要がある。(1)〜(3)による方法
はいずれも雰囲気ガスの加熱効率、排出効率並び
に負圧保持、溶剤ガス洩れ防止等を考慮した結果
必ずしも十分ではなく、(4)による溶剤の蒸発除去
方法が望ましいと考えられる。この場合、前述の
如く乾燥室3の雰囲気ガスはガス還流管32を通
して取出されて加熱されると共にフアン33によ
りガスノズル31へ送られ、走行する金属帯1に
吹付けられる。 Methods for evaporating and removing the solvent adhering to the metal strip 1 in the drying chamber 3 include (1) direct heating of the atmosphere of the drying chamber 3, for example, by high frequency, (2) indirect heating of the atmosphere of the drying chamber 3, for example, using steam or combustion gas; 3) A method of supplying a heated gas such as an inert gas or nitrogen gas to the drying chamber 3 from the outside, and (4) a method of supplying internal gas to the drying chamber 3 after being refluxed and heated. (1) and above
Regarding (2), since the heated atmospheric gas contacts the surface of the metal strip 1 and evaporates the solvent, it becomes difficult to adjust the temperature of the atmospheric gas to follow the increase in the running speed of the metal strip 1. However, there is a problem in that heating costs are also high. Regarding (3), since excess gas enters the drying chamber 3 from the outside, it is necessary to exhaust the amount of gas that was supplied again. All of the methods (1) to (3) are not necessarily sufficient in consideration of heating efficiency of atmospheric gas, discharge efficiency, negative pressure maintenance, prevention of solvent gas leakage, etc., and method (4) for evaporating the solvent is preferable. it is conceivable that. In this case, as described above, the atmospheric gas in the drying chamber 3 is taken out through the gas reflux pipe 32, heated, and sent to the gas nozzle 31 by the fan 33, where it is sprayed onto the running metal strip 1.
このように乾燥ガスが噴射されるのは乾燥効率
が良い点もあるが、金属帯1の走行速度により噴
射圧力と噴射温度とを制御することが出来るから
である。ただし、噴射温度については噴射ガス中
に溶剤ガスが含まれているから少なくとも溶剤蒸
発温度以上となるように注意を要する。また、噴
射された1部のガスは再度取出されれ加熱供給さ
れるので、最低溶剤蒸発温度にプラス10℃以上と
なるように加熱されることが必要である。例えば
一般的に使用されている洗浄有機溶剤である。ト
リクロルエチレンの場合、乾燥ガス温度は最低約
100℃に加熱される必要がある。また、パークロ
ルエチレンであれば約130℃、メチレンクロライ
トであれば約50℃である。 The reason why the drying gas is injected in this way is that the drying efficiency is good, but also because the injection pressure and the injection temperature can be controlled by the traveling speed of the metal band 1. However, since the injection gas contains solvent gas, care must be taken to ensure that the injection temperature is at least equal to or higher than the solvent evaporation temperature. Further, since a part of the injected gas is taken out again and heated and supplied, it is necessary to heat it to a temperature of 10° C. or more above the minimum solvent evaporation temperature. For example, commonly used cleaning organic solvents. For trichlorethylene, the drying gas temperature should be at least approx.
Needs to be heated to 100℃. Furthermore, the temperature is approximately 130°C for perchlorethylene and approximately 50°C for methylene chlorite.
また、乾燥ガス温度を上昇することは溶剤の蒸
発を促進して乾燥速度をあげるため金属帯1の走
行速度を上昇させることが可能である。しかし、
この場合金属帯1に対する温度による悪影響が問
題となる。被処理金属の種類にもよるがアルミニ
ウム特にアルミニウム合金では約120℃以上で温
度の影響を受け、熱歪や機械的性質に変化を生じ
る。従つて、乾燥ガスの温度をあまり高くするこ
とはできない。使用する溶剤や被処理金属の種類
によるが乾燥ガス温度は実験によると、溶剤蒸発
温度に約60℃をプラスした温度を限度とするとよ
いことが判明した。それでも、乾燥温度は50℃の
温度範囲で溶剤蒸発乾燥を制御できるし、これに
ガス噴射圧の調整を加味すれば、金属帯1の走行
速度の広範囲にわたる乾燥をカバーできることに
なる。 Furthermore, since increasing the drying gas temperature promotes evaporation of the solvent and increases the drying speed, it is possible to increase the running speed of the metal strip 1. but,
In this case, the adverse effect of temperature on the metal band 1 becomes a problem. Although it depends on the type of metal to be treated, aluminum, especially aluminum alloys, is affected by temperature above about 120°C, causing thermal strain and changes in mechanical properties. Therefore, the temperature of the drying gas cannot be made too high. Although it depends on the solvent used and the type of metal to be treated, experiments have shown that it is best to limit the drying gas temperature to the solvent evaporation temperature plus approximately 60°C. Even so, solvent evaporation drying can be controlled within a drying temperature range of 50° C., and if the gas injection pressure is adjusted to this, drying over a wide range of running speeds of the metal strip 1 can be covered.
次に、洗浄室2a,2b,2c,2d及び乾燥
室3を負圧に保持するため前述の溶剤ガス液化処
理装置24により吸引ガス量を調整する場合、回
収ブロワ26の回転数やダンパーの開度の自動制
御により調整できる。吸引ガス量が増し室内圧が
下がり過ぎると外気の侵入が激しくなるばかりで
なく、原因は不明であるが実験によると室内ガス
が逆流して乾燥室3の金属帯1出口隙間から金属
帯1表面に付着追従して室外に溶剤ガスを含んだ
気体を搬出してしまう。このため室内圧は外圧に
対して約−50mmAq以下つまり−10mmAq前後の圧
力に保持されることが好ましい。 Next, in order to maintain the cleaning chambers 2a, 2b, 2c, 2d and the drying chamber 3 at negative pressure, the amount of suction gas is adjusted by the above-mentioned solvent gas liquefaction processing device 24. It can be adjusted by automatic control of the degree. When the amount of suction gas increases and the indoor pressure decreases too much, not only does the intrusion of outside air become more intense, but the cause is unknown, but experiments have shown that indoor gas flows backwards from the outlet gap of the metal strip 1 in the drying chamber 3 to the surface of the metal strip 1. The solvent adheres to the solvent and carries out the gas containing the solvent gas outside. For this reason, it is preferable that the indoor pressure be maintained at about -50 mmAq or less, that is, around -10 mmAq, with respect to the external pressure.
溶剤ガスが上述の如く金属帯1に付着して室外
に出るのを防ぐため、ガスノズル31を金属帯1
の走行方向と逆方向に向けて乾燥ガスを吹付けた
結果溶剤ガスの搬出量は幾分減少した。乾燥ガス
を金属帯1表面に吹付けて付着した溶剤を蒸発さ
せてもその溶剤ガスは金属帯1表面から直ちに遊
離せずにそのまま室外に搬出されるものとみら
れ、このことは金属帯1の走行速度をあげる程溶
剤ガスの搬出量が多くなる事実から推察すること
ができる。 In order to prevent the solvent gas from adhering to the metal strip 1 and going outside as described above, the gas nozzle 31 is connected to the metal strip 1.
As a result of spraying dry gas in the direction opposite to the direction of travel, the amount of solvent gas discharged was somewhat reduced. Even if dry gas is sprayed onto the surface of the metal strip 1 to evaporate the adhering solvent, it seems that the solvent gas is not immediately released from the surface of the metal strip 1 and is directly carried outside. This can be inferred from the fact that as the running speed increases, the amount of solvent gas discharged increases.
そこで、本発明者等は金属帯1表面に付着した
液状溶剤を表面から剥離すると同時に蒸発飛散さ
せようと考えた。 Therefore, the inventors of the present invention devised an idea to peel off the liquid solvent adhering to the surface of the metal strip 1 from the surface and at the same time evaporate and scatter it.
この場合、2個のガスノズル31を金属帯1の
走行方向に沿つて対向傾斜して配置し、乾燥ガス
を金属帯1表面上で交差するように噴射させると
効果的である。また、洗浄室2dに近い複数個の
ガスノズル31を金属帯1の走行方向に傾斜させ
ると共にこれらに対応して複数個のガスノズル3
1を逆走行方向に傾斜させた場合も同様の効果が
得られた。これはおそらく溶剤が液体の段階で金
属帯1表面から飛散されてガス化するため、金属
帯1による溶剤の搬出が殆んどなくなり、加えて
ガスノズル31の対向傾斜ガス噴射により室内ガ
スが大きく撹拌されて溶剤ガスの吸引効率が高ま
ることによるものと考えられる。 In this case, it is effective to arrange the two gas nozzles 31 so as to face each other along the running direction of the metal strip 1 so as to inject the dry gas so as to intersect with each other on the surface of the metal strip 1. Further, the plurality of gas nozzles 31 near the cleaning chamber 2d are tilted in the running direction of the metal strip 1, and the plurality of gas nozzles 3 are also
A similar effect was obtained when 1 was tilted in the opposite running direction. This is probably because the solvent is scattered from the surface of the metal strip 1 when it is in a liquid state and becomes gasified, so that almost no solvent is carried out by the metal strip 1, and in addition, the gas in the room is greatly stirred by the gas nozzle 31's opposing inclined gas jets. This is thought to be due to the increased suction efficiency of solvent gas.
さらに、実施の具体例を説明すると厚さ0.5
mm、幅900mmの金属帯1にアルミニウム或はアル
ミニウム合金帯を使用して100m/minの高速走行
を行いメタクレン液で連続的にカスケードスプレ
ー洗浄した場合、スプレーノズル5,12の角
度、スプレー量によつて多少異るが、スプレー圧
0.5Kg/cm2でほぼ完全に脱脂できた。ただし、この
場合各洗浄室ラインでスプレー洗浄を3回繰返し
行ない、最後に新液でスプレー洗浄している。ラ
インスピードをあげて約200m/minにした場合ス
プレー圧力約1Kg/cm2で、また速度を約500m/mi
nにした場合スプレー圧力約2Kg/cm2でそれぞれ
洗浄した結果、油脂、塵埃類の汚染物の残留は殆
んど認められなかつた。洗浄乾燥処理したアルミ
ニウムやアルミニウム合金の金属帯1表面の塗装
性も良好である。 Furthermore, to explain a specific example of implementation, the thickness is 0.5
When an aluminum or aluminum alloy strip is used as a metal strip 1 with a width of 900 mm and is run at a high speed of 100 m/min and is continuously cleaned with a cascade spray using a metacrene solution, the angle of the spray nozzles 5 and 12 and the amount of spray The spray pressure may vary slightly depending on the
Almost complete degreasing was achieved at 0.5Kg/cm 2 . However, in this case, spray cleaning is repeated three times in each cleaning chamber line, and the final spray cleaning is performed with a new solution. If the line speed is increased to approximately 200m/min, the spray pressure will be approximately 1Kg/cm 2 , and the speed will be increased to approximately 500m/min.
In the case of cleaning with a spray pressure of about 2 kg/cm 2 , almost no residual contaminants such as oil, fat, and dust were observed. The paintability of the surface of the washed and dried aluminum or aluminum alloy metal strip 1 is also good.
次に、溶剤のカスケード洗浄操業における作業
安全対策については、まず金属帯1入側洗浄室2
aのカスケードタンク4に連通するサブタンクを
設けると共にこのサブタンクに各洗浄室に滞留し
た溶剤を排出して貯えて、洗浄室2a内の点検作
業を安全にすることができる。 Next, regarding work safety measures in solvent cascade cleaning operations, we will first discuss the metal strip 1 entry side cleaning room 2.
A sub-tank communicating with the cascade tank 4 of a is provided, and the solvent accumulated in each cleaning chamber is discharged and stored in this sub-tank, thereby making inspection work inside the cleaning chamber 2a safe.
また、各洗浄室及び乾燥室3に洗浄後微量の溶
剤ガスが残留しているため室内の点検作業が危険
であるが室内ガスを換気フアン等で排出すること
ができる。 In addition, since a small amount of solvent gas remains in each cleaning chamber and drying chamber 3 after cleaning, inspection work inside the chamber is dangerous, but the indoor gas can be exhausted using a ventilation fan or the like.
上述した如く本発明によれば、走行する金属帯
を従来使用されなかつた溶剤を適用して高速連続
脱脂処理を確実且つ効率的に行い得ることが可能
となり、また処理済溶剤の再使用や溶剤ガスの回
収を図ることにより溶剤ロスを無くして経済性の
向上及び公害防止に大きく貢献し得るものであ
る。 As described above, according to the present invention, it is possible to perform high-speed continuous degreasing treatment reliably and efficiently by applying a solvent that has not been used conventionally to a moving metal strip, and it is also possible to reuse treated solvents and to By recovering the gas, solvent loss can be eliminated, which can greatly contribute to improving economic efficiency and preventing pollution.
図面はこの発明に係る金属帯の連続脱脂方法及
び同装置の流路図である。
1…金属帯、2a,2b,2c,2d…洗浄
室、3…乾燥室、4…カスケードタンク、5…ス
プレーノズル、6…リンガーロール、7…スプレ
ーポンプ、8…溶剤循環管、9…溶剤再生液供給
管、10…蒸留原液ポンプ、11…溶剤蒸留再生
装置、12…シヤワーノズル、13…蒸留器、1
4…冷凍機、15…蒸留器デカンタ、16…廃液
タンク、17…再生液貯蔵タンク、18…廃液ポ
ンプ、19…再生液ポンプ、20…オーバーフロ
ー配管、21…溶剤新液補充管、22…受入タン
ク、23…補給ポンプ、24…溶剤ガス液化処理
装置、25…ガス用管路、26…回収ブロワ、2
7…一次クーラー、28…二次クーラー、29…
深冷クーラー、30…水分離槽、31…ガスノズ
ル、32…ガス還流管、33…フアン、34…加
熱器、35…ガス遮断ボツクス、36…ガス吸引
管、37…排気フアン、A…矢印。
The drawings are flow diagrams of the continuous degreasing method for metal strips and the same apparatus according to the present invention. 1... Metal band, 2a, 2b, 2c, 2d... Washing room, 3... Drying room, 4... Cascade tank, 5... Spray nozzle, 6... Ringer roll, 7... Spray pump, 8... Solvent circulation pipe, 9... Solvent Regeneration liquid supply pipe, 10... Distillation liquid pump, 11... Solvent distillation regeneration device, 12... Shower nozzle, 13... Distiller, 1
4... Refrigerator, 15... Still decanter, 16... Waste liquid tank, 17... Regenerated liquid storage tank, 18... Waste liquid pump, 19... Regenerated liquid pump, 20... Overflow piping, 21... New solvent replenishment pipe, 22... Receiving Tank, 23...Supplementary pump, 24...Solvent gas liquefaction processing device, 25...Gas pipe line, 26...Recovery blower, 2
7...Primary cooler, 28...Secondary cooler, 29...
Deep cooling cooler, 30...Water separation tank, 31...Gas nozzle, 32...Gas recirculation pipe, 33...Fan, 34...Heater, 35...Gas cutoff box, 36...Gas suction pipe, 37...Exhaust fan, A...Arrow.
Claims (1)
走行させて連続的に脱脂洗浄し、ついで乾燥させ
るにあたり前記金属帯を少なくとも1個の洗浄室
を通して洗浄するとともに付着した溶剤を各洗浄
室出側で拭取したのち熱風乾燥室に導く一方、洗
浄に使用後蒸留処理された溶剤の再生液と補充溶
剤に新液とを金属帯出側端の洗浄室から供給して
該洗浄室における金属帯の洗浄に供したのち、金
属帯入側に向けてカスケード流下させて蒸留再生
装置に導くとともに、各洗浄室での洗浄にはカス
ケード流下中の溶剤を使用し、また各洗浄室及び
前記乾燥室内に生じた溶剤ガスを回収液化して前
記溶剤の補充用剤の新液と共に使用することを特
徴とする金属帯の連続脱脂方法。 2 金属帯を溶剤のスプレーまたはシヤワー中で
走行させて連続的に脱脂洗浄し、ついで乾燥させ
る装置において前記金属帯の走行方向に沿つて配
設された少くとも1個の洗浄室と、該洗浄室に連
通した乾燥室と、前記各洗浄室内に設けられたス
プレーまたはシヤワーノズル及び各洗浄室出側に
設けられたリンガーロールと、前記洗浄室の下部
において金属帯の走行方向と逆方向にけて各洗浄
室に対応して設置されたカスケードタンクと、金
属帯の入側端洗浄室に対応する前記カスケードタ
ンクより溶剤蒸留再生装置を経て金属帯出側端洗
浄室内のスプレーまたはシヤワーノズルに連結さ
れた溶剤再生液供給管と、該スプレーまたはシヤ
ワーノズルに連結された溶剤新液補充管と、前記
洗浄室のスプレーまたはシヤワーノズルと前記カ
スケードタンクとを結ぶ溶剤循環管と、前記洗浄
室及び乾燥室より溶剤ガス液化処理装置を経て再
生液貯蔵タンクに至る管路とからなることを特徴
とする金属帯の連続脱脂装置。[Scope of Claims] 1. A metal strip is continuously degreased and cleaned by running it in a solvent spray or shower, and then, during drying, the metal strip is washed through at least one cleaning chamber and the adhering solvent is removed from each of the metal strips. After wiping at the outlet side of the cleaning chamber, the metal strip is led to the hot air drying chamber, while a regenerated solution of the distilled solvent used for cleaning and a new solution for replenishment are supplied from the cleaning chamber at the end of the metal strip outlet side. After washing the metal strip in the cascade, the metal strip is flowed down to the inlet side of the cascade and led to the distillation regeneration equipment.The solvent flowing down the cascade is used for cleaning in each cleaning chamber, and A continuous degreasing method for metal strips, characterized in that the solvent gas generated in the drying chamber is recovered and liquefied and used together with a fresh solution of the solvent replenisher. 2. At least one cleaning chamber disposed along the running direction of the metal strip in an apparatus for continuously degreasing and cleaning the metal strip by running it in a solvent spray or shower, and then drying it, and the cleaning A drying chamber that communicates with the cleaning chamber, a spray or shower nozzle provided in each of the cleaning chambers, a ringer roll provided at the exit side of each cleaning chamber, and a drying chamber that is installed in the lower part of the cleaning chamber in the opposite direction to the running direction of the metal strip. A cascade tank is installed corresponding to each cleaning chamber, and the cascade tank corresponding to the inlet end cleaning chamber of the metal strip is connected to a spray or shower nozzle in the metal strip outlet end cleaning chamber via a solvent distillation regeneration device. a new solvent replenishment pipe connected to the spray or shower nozzle; a solvent circulation pipe connecting the spray or shower nozzle of the cleaning chamber to the cascade tank; and the cleaning chamber and drying chamber. 1. A continuous degreasing device for metal strips, characterized in that the device comprises a pipe line that passes through a solvent gas liquefaction processing device and reaches a regenerated liquid storage tank.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1190281A JPS57126978A (en) | 1981-01-29 | 1981-01-29 | Method and apparatus for continuously degreasing and washing metal strip |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1190281A JPS57126978A (en) | 1981-01-29 | 1981-01-29 | Method and apparatus for continuously degreasing and washing metal strip |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57126978A JPS57126978A (en) | 1982-08-06 |
JPS6140038B2 true JPS6140038B2 (en) | 1986-09-06 |
Family
ID=11790656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1190281A Granted JPS57126978A (en) | 1981-01-29 | 1981-01-29 | Method and apparatus for continuously degreasing and washing metal strip |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57126978A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0626730B2 (en) * | 1985-10-29 | 1994-04-13 | 新日本製鐵株式会社 | Metal strip pickling equipment |
DE4206058A1 (en) * | 1992-02-27 | 1993-09-02 | Kabelmetal Ag | METHOD FOR DEGREASING LONG-STRETCHED METAL ITEMS |
-
1981
- 1981-01-29 JP JP1190281A patent/JPS57126978A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS57126978A (en) | 1982-08-06 |
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