JP2011236458A - Pickling facility - Google Patents
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Abstract
Description
本発明は、酸洗設備に関する。 The present invention relates to pickling equipment.
鋼帯の表面に形成されたスケールを除去する設備として、酸性薬液が貯留された連続酸洗設備が使用される。酸性薬液としては、例えば、塩酸や硫酸が使用され、酸性薬液はスケール除去に適した９０℃程度の高温となっている。 As equipment for removing scale formed on the surface of the steel strip, continuous pickling equipment in which an acidic chemical solution is stored is used. For example, hydrochloric acid or sulfuric acid is used as the acidic chemical solution, and the acidic chemical solution has a high temperature of about 90 ° C. suitable for scale removal.
酸性薬液を貯留する従来の酸洗槽は、酸洗槽の外形を形作る鉄皮タンクと、鉄皮タンクの内面を覆う耐熱性及び耐酸性を備えたライニング材と、ライニング材の内面に敷き詰められた耐熱性及び耐酸性を備えたレンガとで構成されている。ライニング材は、酸性薬液による鉄皮タンクの腐食を防止する。レンガは、酸性薬液からライニング材及び鉄皮タンクに伝わる熱を遮断して、熱によりライニング材及び鉄皮タンクが変形したり破損したりすることを防いでいる（例えば、特許文献１）。 Conventional pickling tanks that store acidic chemicals are laid on the inner surface of an iron skin tank that forms the outer shape of the pickling tank, a lining material with heat resistance and acid resistance that covers the inner surface of the iron tank, and the inner surface of the lining material. And bricks with heat resistance and acid resistance. The lining material prevents corrosion of the iron skin tank due to acidic chemicals. The brick blocks the heat transmitted from the acidic chemical to the lining material and the iron skin tank, and prevents the lining material and the iron tank from being deformed or damaged by the heat (for example, Patent Document 1).
酸洗槽に貯留された酸性薬液からは、塩化水素や硫化水素などの酸ヒュームが発生する。酸ヒュームが酸洗槽から漏れると周辺の設備を腐食するおそれが高い。また、高温の酸ヒュームが酸洗槽から大量に漏れると、酸洗槽付近での作業が困難となる。そのため、従来は、酸洗槽の隙間を可能な限り塞ぐことにより酸ヒュームを酸洗槽内に閉じ込めたり、連続酸洗設備と他の設備とを別の建屋に収容することにより酸ヒュームを他の設備に到達させないようにしたりしている。 Acid fume such as hydrogen chloride and hydrogen sulfide is generated from the acidic chemical stored in the pickling tank. If acid fume leaks from the pickling tank, there is a high risk of corroding surrounding equipment. In addition, if a large amount of hot fume leaks from the pickling tank, it becomes difficult to work near the pickling tank. Therefore, in the past, acid fume was confined in the pickling tank by closing the gap between the pickling tanks as much as possible, or the pickling fume was stored in another building by storing the continuous pickling equipment and other equipment in another building. I try not to reach the facilities.
しかしながら、定期的に点検または修理したり、緊急の際に不定期的に点検または修理したりする際には、作業員が酸洗槽の蓋部を開放する必要がある。従来の連続酸洗設備では、レンガ、ライニング材及び鉄皮タンクの層間等に酸性薬液が残るという構造的に不可避の問題があるため、酸ヒュームの発生源である酸性薬液を酸洗槽から完全に除去することは現実的に不可能なほど困難で時間がかかる。それ故、酸洗槽の蓋部が開放されたときには、酸ヒュームが少なからず拡散し、周辺の設備を腐食させてしまうだけでなく、酸洗槽付近での作業に困難を伴うといった問題がある。 However, when regularly inspecting or repairing or irregularly inspecting or repairing in an emergency, an operator needs to open the lid of the pickling tank. In conventional continuous pickling equipment, there is a structural unavoidable problem that the acidic chemical solution remains between the bricks, lining materials, and the iron skin tank, so the acidic chemical solution that is the source of acid fume is completely removed from the pickling tank. It is difficult and time consuming to remove it. Therefore, when the lid of the pickling tank is opened, there is a problem that not only the acid fume diffuses and corrodes surrounding equipment, but also the work near the pickling tank is difficult. .
本発明は、酸洗槽周辺設備の腐食及び酸洗槽付近での作業の困難性を軽減することが可能な酸洗設備を提供することを目的とする。 An object of this invention is to provide the pickling equipment which can reduce the corrosion of pickling tank periphery equipment, and the difficulty of the operation | work in the pickling tank vicinity.
本発明の第１の酸洗設備は、鋼帯を酸性薬液によって酸洗する酸洗設備であって、酸性薬液を貯留する耐酸性樹脂製の酸洗槽と、酸洗槽の内部に配設されて洗浄液を放出する洗浄ノズルと、酸洗槽を貫通して酸洗槽の外部から洗浄ノズルに洗浄液を供給する配管と、を備える。 The first pickling equipment of the present invention is a pickling equipment for pickling a steel strip with an acidic chemical solution, and is disposed in an acid-resistant resin pickling tank for storing the acidic chemical solution and inside the pickling tank. A cleaning nozzle that discharges the cleaning liquid and a pipe that passes through the pickling tank and supplies the cleaning liquid from the outside of the pickling tank to the cleaning nozzle.
本発明の第１の酸洗設備によれば、耐酸性樹脂製の酸洗槽を貫くように配設された配管から、酸洗槽内部に配設された洗浄ノズルに洗浄液を供給するように構成されているため、酸洗槽の蓋部が開放される前に、酸ヒュームを発生させる酸性薬液を洗い流すことが可能となる。これにより、酸洗槽の蓋部の開放による酸ヒュームの拡散を抑制することができ、酸洗槽周辺設備の腐食及び酸洗槽付近での作業の困難性が軽減される。 According to the first pickling facility of the present invention, the cleaning liquid is supplied to the cleaning nozzle disposed inside the pickling tank from the pipe disposed so as to penetrate the acid-resistant resin pickling tank. Since it is comprised, before the cover part of a pickling tank is opened, it becomes possible to wash away the acidic chemical | medical solution which generates an acid fume. Thereby, the diffusion of the acid fume due to the opening of the lid portion of the pickling tank can be suppressed, and the corrosion of the peripheral equipment of the pickling tank and the difficulty of work in the vicinity of the pickling tank are reduced.
また、従来のように酸洗槽内部にレンガを敷き詰めている場合には、酸洗工程においてレンガの気泡に酸性薬液がしみ込んでいる。更に、従来のようにライニング材及び鉄皮タンクなどを積層した構造を有している場合には、層間に酸性薬液が残る。つまり、従来の酸洗設備では、酸洗槽内を洗浄しても酸性薬液を除去することができなかったため、酸洗槽内を洗浄しても残存した酸性薬液からの酸ヒュームの発生を防ぐことができない。 In addition, when bricks are laid in the pickling tank as in the past, the acidic chemical solution has permeated into the bubbles of the bricks in the pickling process. Furthermore, when it has the structure which laminated | stacked the lining material and the iron-skin tank etc. conventionally, an acidic chemical | medical solution remains between layers. In other words, in the conventional pickling equipment, the acidic chemical liquid could not be removed even if the inside of the pickling tank was washed, so that the generation of acid fumes from the remaining acidic chemical liquid was prevented even if the inside of the pickling tank was washed. I can't.
この点、本発明の第１の酸洗設備によれば酸洗槽を耐酸性樹脂製とすることにより、単層で形成することができ、酸性薬液をほぼ残さずに洗浄することが可能となる。その結果、洗浄後に酸洗槽の蓋部が開放されたとしても、従来の酸洗槽のような酸ヒュームの発生を抑制することが可能となる。耐酸性樹脂製の酸洗槽としてはポリプロピレン製の酸洗槽が例示される。 In this regard, according to the first pickling facility of the present invention, the pickling tank is made of an acid-resistant resin, so that it can be formed as a single layer and can be cleaned without substantially leaving an acidic chemical solution. Become. As a result, even if the lid portion of the pickling tank is opened after cleaning, it is possible to suppress the generation of acid fumes as in the conventional pickling tank. An example of the acid-resistant resin pickling tank is a polypropylene pickling tank.
なお、酸洗槽内の底面に傾斜を設け、当該底面の位置レベルが最も低い部位に、洗浄により発生した廃液を酸洗槽の外部に排出する廃液口が備えられていることが好ましい。これにより、重力の作用によって酸洗槽内に廃液が残存することなく酸洗槽の外部に排出することができる。 In addition, it is preferable that the bottom surface in the pickling tank is inclined, and a waste liquid port for discharging the waste liquid generated by the cleaning to the outside of the pickling tank is provided in a portion where the position level of the bottom surface is the lowest. Accordingly, the waste liquid can be discharged outside the pickling tank without remaining in the pickling tank by the action of gravity.
また、従来のようなレンガを敷き詰めた酸洗槽や、レンガ以外の積層構造を有する酸洗槽では、酸洗槽を貫いて洗浄液用の配管を挿入すると、酸洗槽を構成するレンガ、ライニング材及び鉄皮タンクをすべて貫くように加工しなければならず、加工が困難である。更に、洗浄液用の配管を酸洗槽内のレンガ又はレンガ以外の積層部分に強固に据え付けることが容易でないため、使用時に洗浄液用の配管が破損するおそれがある。また、洗浄液用の配管を酸洗槽内のレンガ又はレンガ以外の積層構造に強固に据え付けることが容易でないため、最適な位置に洗浄液用の配管を固定することができず、洗浄性能が低くなる可能性がある。 In addition, in pickling tanks that have been laid with bricks as in the past and pickling tanks having a laminated structure other than bricks, if pipes for cleaning liquid are inserted through the pickling tank, the bricks and linings that constitute the pickling tank It must be processed so as to penetrate all the material and the iron skin tank, and the processing is difficult. Furthermore, since it is not easy to firmly install the pipe for the cleaning liquid on the brick in the pickling tank or a laminated portion other than the brick, the pipe for the cleaning liquid may be damaged during use. Also, since it is not easy to firmly install the pipe for the cleaning liquid on the brick in the pickling tank or a laminated structure other than the brick, the pipe for the cleaning liquid cannot be fixed at the optimum position, and the cleaning performance is lowered. there is a possibility.
この点、酸洗槽を例えばポリプロピレンのような耐酸性樹脂製とすることにより単層で形成することができ、従来よりも酸洗槽を加工することが容易となるため、酸洗槽を貫いて洗浄用の配管を挿入することが容易となる。またこれに加えて、洗浄用の配管を最適な位置に据え付けやすくなる。 In this respect, the pickling tank can be formed as a single layer by making it an acid-resistant resin such as polypropylene, for example, and since it becomes easier to process the pickling tank than before, it penetrates the pickling tank. Thus, it becomes easy to insert the piping for cleaning. In addition to this, it becomes easy to install the cleaning pipe at an optimum position.
本発明の第２の酸洗設備は、第１の酸洗設備において、酸洗槽から洗浄液と酸性薬液とを含む廃液を排出する廃液路と、廃液路に排出される廃液のｐｈ値を計測することにより酸洗槽に残された酸性薬液の量を間接的に検出する残量検出手段とを更に備える。 The second pickling facility of the present invention is the first pickling facility, which measures the ph value of the waste liquid discharged from the pickling tank, the waste liquid path discharging the waste liquid containing the cleaning liquid and the acidic chemical liquid, and the waste liquid path. And a remaining amount detecting means for indirectly detecting the amount of the acidic chemical liquid left in the pickling tank.
本発明の第２の酸洗設備によれば、酸洗槽内部を洗浄しながら酸洗槽内に残された酸性薬液の残量を検出することにより、酸洗槽の蓋部が開放される前に酸ヒュームの拡散量を予測することが可能となる。従って、酸洗槽内の酸性薬液が十分に洗い流されたことを確認してから酸洗槽の蓋部を開放することにより、酸ヒュームの拡散による周辺機器への影響を従来の酸洗設備より著しく減らすことが可能となる。 According to the second pickling facility of the present invention, the lid of the pickling tank is opened by detecting the remaining amount of the acidic chemical remaining in the pickling tank while cleaning the inside of the pickling tank. It is possible to predict the amount of acid fume diffusion before. Therefore, after confirming that the acidic chemical solution in the pickling tank has been sufficiently washed away, open the lid of the pickling tank, so that the influence on the peripheral equipment due to the diffusion of the acid fume is greater than the conventional pickling equipment. It can be significantly reduced.
本発明の酸洗設備によれば、酸洗槽周辺設備の腐食及び酸洗槽付近での作業の困難性を軽減することができる。 According to the pickling equipment of the present invention, it is possible to reduce the corrosion of the equipment around the pickling tank and the difficulty of work in the vicinity of the pickling tank.
図１は、一実施形態に係る連続酸洗設備１の概略構成図である。図１に示すように、連続酸洗設備１は、酸洗槽１０、廃液ダクト１１、廃液ピット１２、洗浄ユニット１３、残量検出ユニット１４、及び、操作室１５により構成されている。 Drawing 1 is a schematic structure figure of continuous pickling equipment 1 concerning one embodiment. As shown in FIG. 1, the continuous pickling facility 1 includes a pickling tank 10, a waste liquid duct 11, a waste liquid pit 12, a cleaning unit 13, a remaining amount detection unit 14, and an operation room 15.
本実施形態の酸洗槽１０は、ポリプロピレン（ＰＰ：ｐｏｌｙｐｒｏｐｙｌｅｎｅ）を材料として略直方体形状に形成されている。酸洗槽１０は、従来のようにレンガ、ライニング材及び鉄皮タンクを積層して形成されているのではなく、ポリプロピレンにより単層で形成されている。酸洗槽１０の略長方形板状の底部２０は水平面に対して若干傾斜するよう配設されている。酸洗槽１０の底部２０の４つの直線状の端縁部から略垂直に４つの壁部２１が立設されている。４つの壁部２１の全上端部により長方形状に囲われた酸洗槽１０上部の開口２２は、蓋部２３により開閉可能に覆われている。 The pickling tank 10 of this embodiment is formed in a substantially rectangular parallelepiped shape using polypropylene (PP) as a material. The pickling tank 10 is not formed by laminating bricks, lining materials, and iron skin tanks as in the prior art, but is formed by a single layer of polypropylene. The bottom portion 20 of the substantially rectangular plate shape of the pickling tank 10 is disposed so as to be slightly inclined with respect to the horizontal plane. Four wall portions 21 are erected substantially vertically from the four straight edge portions of the bottom portion 20 of the pickling tank 10. An opening 22 in the upper part of the pickling tank 10 surrounded by a rectangular shape by all upper ends of the four wall portions 21 is covered with a lid portion 23 so as to be opened and closed.
表面にスケールが形成された鋼帯は、表面に形成されたスケールを除去すべく、内部に酸性薬液が貯留された酸洗槽１０内を搬送される。酸性薬液としては、例えば、塩酸、硫酸、硝酸、フッ化水素酸（フッ酸）が使用され、酸性薬液はスケール除去に適した９０℃程度の高温となっている。 The steel strip with the scale formed on the surface is transported through the pickling tank 10 in which the acidic chemical solution is stored in order to remove the scale formed on the surface. For example, hydrochloric acid, sulfuric acid, nitric acid, hydrofluoric acid (hydrofluoric acid) is used as the acidic chemical solution, and the acidic chemical solution has a high temperature of about 90 ° C. suitable for scale removal.
酸洗槽１０の壁部２１の下部には廃液ダクト１１につながった廃液口２４が備えられている。酸洗槽１０の底部２０は上述したように傾斜しており、位置レベルの最も低い底部２０の面と廃液口２４の最下面とが面一、または、位置レベルの最も低い底部２０の面よりも廃液口２４の最下面の位置レベルの方が低くなるように、廃液口２４が備えられている。 A waste liquid port 24 connected to the waste liquid duct 11 is provided at a lower portion of the wall portion 21 of the pickling tank 10. The bottom portion 20 of the pickling tank 10 is inclined as described above, and the surface of the bottom portion 20 having the lowest position level is flush with the lowermost surface of the waste liquid port 24 or the surface of the bottom portion 20 having the lowest position level. Also, the waste liquid port 24 is provided so that the position level of the lowermost surface of the waste liquid port 24 is lower.
また、酸洗槽１０の底部２０及び壁部２１の各内面は、酸洗槽１０内の流体を重力によって自然に廃液口２４に誘導するように滑らかに形成されている。廃液ダクト１１は、流体を酸洗槽１０から廃液ピット１２に誘導するように配設されている。廃液口２４は開閉可能に構成されており、酸洗槽１０から酸性薬液を適宜抜き取ることができる。酸洗槽１０から酸性薬液を抜き取る工程は、定期的に実施されるとともに、製造ラインの緊急停止時などにおいて不定期的に実施される。 Moreover, each inner surface of the bottom part 20 and the wall part 21 of the pickling tank 10 is formed smoothly so that the fluid in the pickling tank 10 may be naturally guided to the waste liquid port 24 by gravity. The waste liquid duct 11 is disposed so as to guide the fluid from the pickling tank 10 to the waste liquid pit 12. The waste liquid port 24 is configured to be openable and closable, and the acidic chemical liquid can be appropriately removed from the pickling tank 10. The step of extracting the acidic chemical solution from the pickling tank 10 is performed regularly and irregularly at the time of an emergency stop of the production line.
図２の概略断面図に例示した従来の酸洗槽５０は、酸洗槽５０の外形を形作る鉄皮タンク５１と、鉄皮タンク５１の内面を覆う耐熱性及び耐酸性を備えたゴム製のライニング材５２と、ライニング材５２の内面に敷き詰められた耐熱性及び耐酸性を備えたレンガ５３と吸引ダクト５４とにより構成されている。このような従来の酸洗槽５０において、酸洗槽５０の内側で最も下に位置する底面５５付近に破線で示すような孔５６を形成する場合、レンガ５３、ライニング材５２及び鉄皮タンク５１の複数層を全て貫通するように孔５６を形成しなければならず、加工が困難である。更に、加工した孔５６周辺の強度が弱くなるおそれがあるため、孔５６を通すことは現実的ではない。そのため、従来は、酸洗槽５０の上部開口から酸洗槽５０の内部の底面５５まで、酸性薬液をポンプ等によって吸引するために吸引ダクト５４が配設されていた。しかし、従来のこのような構成によると、吸引ダクト５４の吸引口５７を酸洗槽５０の底面５５付近まで低く配置しても、底面５５と吸引口５７との間に酸性薬液が残ることを避けられない。 A conventional pickling tank 50 illustrated in the schematic cross-sectional view of FIG. 2 is an iron skin tank 51 that forms the outer shape of the pickling tank 50, and is made of rubber having heat resistance and acid resistance that covers the inner surface of the iron skin tank 51. The lining material 52 includes a heat-resistant and acid-resistant brick 53 spread on the inner surface of the lining material 52 and a suction duct 54. In such a conventional pickling tank 50, when the hole 56 as shown with a broken line is formed in the vicinity of the bottom face 55 located in the lowest position inside the pickling tank 50, the brick 53, the lining material 52, and the iron skin tank 51 are formed. The holes 56 must be formed so as to penetrate all of the plurality of layers, and processing is difficult. Furthermore, since the strength around the processed hole 56 may be weakened, it is not realistic to pass the hole 56. Therefore, conventionally, a suction duct 54 is provided from the upper opening of the pickling tank 50 to the bottom surface 55 inside the pickling tank 50 in order to suck the acidic chemical solution by a pump or the like. However, according to such a conventional configuration, even if the suction port 57 of the suction duct 54 is disposed low to the vicinity of the bottom surface 55 of the pickling tank 50, the acidic chemical solution remains between the bottom surface 55 and the suction port 57. Inevitable.
この点、本実施形態の連続酸洗設備１では、酸洗槽１０の底部２０が傾斜しているとともに、酸洗槽１０の壁部２１の下端に廃液口２４が備えられている（位置レベルの最も低い底部２０の面と廃液口２４の最下面とが面一、または、位置レベルの最も低い底部２０の面よりも廃液口２４の最下面の位置レベルの方が低くなるように廃液口２４が備えられている）。更に、酸洗槽１０の底部２０及び壁部２１の各内面が、酸洗槽１０内の流体を重力によって自然に廃液口２４に誘導するように滑らかに形成されているため、酸洗槽１０内面に付着した酸性薬液を従来よりも残りにくくすることができる。 In this regard, in the continuous pickling facility 1 of the present embodiment, the bottom 20 of the pickling tank 10 is inclined, and a waste liquid port 24 is provided at the lower end of the wall 21 of the pickling tank 10 (position level). The bottom surface of the bottom 20 and the bottom surface of the waste liquid port 24 are flush with each other, or the position of the bottom surface of the waste liquid port 24 is lower than the surface of the bottom 20 with the lowest position level. 24). Furthermore, since each inner surface of the bottom part 20 and the wall part 21 of the pickling tank 10 is formed smoothly so that the fluid in the pickling tank 10 is naturally guided to the waste liquid port 24 by gravity, the pickling tank 10 It is possible to make the acidic chemical solution attached to the inner surface less likely to remain than before.
ただし、重力によって酸性薬液を廃液口２４に導くだけでは、底部２０、壁部２１及び蓋部２３の各内面を含む酸洗槽１０の内面に酸性薬液が残る。本実施形態の連続酸洗設備１は、酸性薬液を抜き取った後に酸洗槽１０の内面及び鋼帯を洗浄するために、洗浄ユニット１３を備えている。 However, the acidic chemical solution remains on the inner surface of the pickling tank 10 including the inner surfaces of the bottom portion 20, the wall portion 21, and the lid portion 23 only by guiding the acidic chemical solution to the waste liquid port 24 by gravity. The continuous pickling equipment 1 of this embodiment includes a cleaning unit 13 for cleaning the inner surface of the pickling tank 10 and the steel strip after extracting the acidic chemical solution.
洗浄ユニット１３は、酸洗槽１０内部に配設された複数の洗浄ノズル３０と、酸洗槽１０の外部に配置されて洗浄液を送り出すポンプ３１と、ポンプ３１から送り出される洗浄液を洗浄ノズル３０に供給する複数の配管３２と、各配管３２の流量を調整するバルブ３３とにより構成されている。複数の洗浄ノズル３０は、底部２０、壁部２１及び蓋部２３の各内面に、できるだけ万遍なく洗浄液をかけることができるように適宜配設されている。ポンプ３１及びバルブ３３は、操作室１５から操作可能となっている。なお、洗浄液は、水であってもよいし、種々の薬品が含まれた流体であってもよい。 The cleaning unit 13 includes a plurality of cleaning nozzles 30 disposed inside the pickling tank 10, a pump 31 that is disposed outside the pickling tank 10 and sends out the cleaning liquid, and the cleaning liquid sent from the pump 31 to the cleaning nozzle 30. A plurality of pipes 32 to be supplied and a valve 33 for adjusting the flow rate of each pipe 32 are configured. The plurality of cleaning nozzles 30 are appropriately arranged so that the cleaning liquid can be applied as uniformly as possible to the inner surfaces of the bottom portion 20, the wall portion 21, and the lid portion 23. The pump 31 and the valve 33 can be operated from the operation chamber 15. The cleaning liquid may be water or a fluid containing various chemicals.
洗浄ノズル３０が酸洗槽１０の内部に配設されているのに対し、ポンプ３１は酸洗槽１０の外部に配設されている。そのため、配管３２は、酸洗槽１０の壁部２１を貫くように配設されている。酸洗槽１０に単に穴を開けるだけでは酸洗槽１０の内部から酸洗槽１０の外部に酸性薬液及び酸ヒュームが漏れるおそれがある。そのため、本実施形態の酸洗槽１０では、配管３２と壁部２１とを隙間が無いように結合している。配管３２と壁部２１との結合方法としては、配管３２と壁部２１とを溶着する方法、配管３２と壁部２１との間に他の部材を充てんする方法、配管３２と壁部２１とを隙間なく密着させる方法などが例示される。 While the cleaning nozzle 30 is disposed inside the pickling tank 10, the pump 31 is disposed outside the pickling tank 10. Therefore, the pipe 32 is disposed so as to penetrate the wall portion 21 of the pickling tank 10. If a hole is simply formed in the pickling tank 10, there is a possibility that the acidic chemical solution and the acid fume leak from the inside of the pickling tank 10 to the outside of the pickling tank 10. Therefore, in the pickling tank 10 of this embodiment, the piping 32 and the wall part 21 are couple | bonded so that there may be no clearance gap. As a method of coupling the pipe 32 and the wall portion 21, a method of welding the pipe 32 and the wall portion 21, a method of filling other members between the pipe 32 and the wall portion 21, a pipe 32 and the wall portion 21, Examples of the method include a method of closely adhering them without gaps.
洗浄工程において、酸洗槽１０の酸性薬液を抜き取った後、洗浄ノズル３０から洗浄液を放出させることによって、酸洗槽１０の内部に残った酸性薬液を洗い流す。洗浄液によって洗い流された酸性薬液と洗浄液とを混合した廃液は、廃液ダクト１１を通じて廃液ピット１２に排出される。 In the washing process, after the acidic chemical solution in the pickling tank 10 is extracted, the acidic chemical solution remaining inside the pickling tank 10 is washed away by discharging the cleaning liquid from the washing nozzle 30. The waste liquid obtained by mixing the acidic chemical liquid washed away by the cleaning liquid and the cleaning liquid is discharged to the waste liquid pit 12 through the waste liquid duct 11.
廃液ダクト１１の途中には、残量検出ユニット１４が配設されている。残量検出ユニット１４は、酸洗槽１０から廃液ピット１２に向かう廃液の一部を分流させる分岐管４０と、分岐管４０によって分流された廃液を一時的に貯留する計測槽４１と、計測槽４１に貯留された廃液のｐｈ値を測定するＰＨ計４２とにより構成されている。ＰＨ計４２で測定されたｐｈ値は、操作室１５に伝達される。計測槽４１に流れ込んだ流体は、最終的に廃液ピット１２に排出される。 A remaining amount detection unit 14 is disposed in the middle of the waste liquid duct 11. The remaining amount detection unit 14 includes a branch pipe 40 for diverting a part of waste liquid from the pickling tank 10 toward the waste liquid pit 12, a measurement tank 41 for temporarily storing the waste liquid diverted by the branch pipe 40, and a measurement tank. The PH meter 42 measures the ph value of the waste liquid stored in 41. The ph value measured by the PH meter 42 is transmitted to the operation room 15. The fluid that has flowed into the measurement tank 41 is finally discharged to the waste liquid pit 12.
滑らかに形成された酸洗槽１０の内面には、従来の酸洗槽の内面のように酸性薬液が残留する箇所がほとんど存在しないため、洗浄時間が増加すると、酸洗槽１０内に残留している酸性薬液が徐々に減少していく。酸洗槽１０内に残留している酸性薬液が減少すると、廃液に含まれる酸性薬液の量が減少する。廃液に含まれる酸性薬液の量が減少すると、廃液のｐｈ値が洗浄液のｐｈ値に近づく。すなわち、洗浄時間が増加すると、廃液のｐｈ値が酸性薬液のｐｈ値から徐々に洗浄液のｐｈ値に近づく。従って、残量検出ユニット１４において、廃液のｐｈ値を計測することにより酸洗槽１０内に残存する酸性薬液の残量を間接的に検出することができる。 On the inner surface of the pickling tank 10 formed smoothly, there is almost no portion where the acidic chemical solution remains unlike the inner surface of the conventional pickling tank. Therefore, if the cleaning time increases, it remains in the pickling tank 10. The acidic chemical solution that is being gradually decreased. When the acidic chemical solution remaining in the pickling tank 10 decreases, the amount of acidic chemical solution contained in the waste liquid decreases. When the amount of the acidic chemical liquid contained in the waste liquid decreases, the ph value of the waste liquid approaches the ph value of the cleaning liquid. That is, as the cleaning time increases, the ph value of the waste liquid gradually approaches the ph value of the cleaning liquid from the ph value of the acidic chemical liquid. Therefore, the remaining amount detection unit 14 can indirectly detect the remaining amount of the acidic chemical remaining in the pickling tank 10 by measuring the ph value of the waste liquid.
操作室１５では、ｐｈ値が所定範囲に入ったときに自動的に洗浄完了と判定し、ランプなどの報知装置によって蓋部２３を開放してもよいことを報知するようにしてもよい。あるいは、作業者がｐｈ値を確認して蓋部２３の開閉を許可するようにしてもよい。酸洗槽１０内の酸性薬液の残量とｐｈ値との関係は、シミュレーション、実験及び事前検証などに基づいて、操作室１５の記憶装置に予めデータとして記憶されている。洗浄完了と判断するｐｈ値は予め固定されていてもよく、適宜入力できるように形成されていてもよい。 The operation chamber 15 may automatically determine that the cleaning is completed when the ph value falls within a predetermined range, and notify that the lid 23 may be opened by a notification device such as a lamp. Alternatively, the operator may confirm the ph value and allow the lid portion 23 to be opened and closed. The relationship between the remaining amount of the acidic chemical solution in the pickling tank 10 and the ph value is stored in advance in the storage device of the operation room 15 as data based on simulation, experiment, prior verification, and the like. The ph value for determining the completion of cleaning may be fixed in advance, or may be formed so that it can be input as appropriate.
洗浄ユニット１３を使用して酸洗槽１０内を洗浄しながら、残量検出ユニット１４を使用して酸洗槽１０における酸性薬液の残量を把握することにより、酸洗槽１０を開ける前に酸ヒュームの拡散量を予測することが可能となる。従って、酸性薬液が十分に洗い流されたことを確認してから酸洗槽１０の蓋部２３を開放することが可能となり、更に、酸ヒュームの拡散による周辺機器への影響を従来の連続酸洗設備より著しく減らすことが可能となる。 Before opening the pickling tank 10 by cleaning the inside of the pickling tank 10 using the cleaning unit 13 and grasping the remaining amount of the acidic chemical in the pickling tank 10 using the remaining amount detection unit 14 It is possible to predict the amount of acid fume diffusion. Accordingly, it is possible to open the lid 23 of the pickling tank 10 after confirming that the acidic chemical solution has been sufficiently washed away, and further, the influence on the peripheral equipment due to the diffusion of the acid fume is compared with the conventional continuous pickling. It can be significantly reduced from the equipment.
更に、酸性薬液より低温の洗浄液によって酸洗槽１０を洗浄することにより、酸洗槽１０の温度を素早く下げることができるため、酸洗槽１０の内部での作業が比較的容易になる。しかも、ポリプロピレン製の酸洗槽１０は、従来の酸洗槽より柔軟に伸縮するため、急速に温度を低下させても従来よりも破損するおそれが少ない。 Furthermore, since the temperature of the pickling tank 10 can be quickly lowered by washing the pickling tank 10 with a washing liquid having a temperature lower than that of the acidic chemical solution, the work inside the pickling tank 10 becomes relatively easy. And since the pickling tank 10 made from polypropylene expands and contracts more flexibly than the conventional pickling tank, even if the temperature is rapidly lowered, there is less possibility of breakage than before.
本実施形態の連続酸洗設備１によれば、酸ヒュームによる酸洗槽周辺装置の腐食と酸洗槽付近での作業の困難性を軽減しながら迅速に酸洗槽１０を開放することが可能となる。 According to the continuous pickling facility 1 of this embodiment, it is possible to quickly open the pickling tank 10 while reducing the corrosion of the pickling tank peripheral device due to the acid fume and the difficulty of work in the vicinity of the pickling tank. It becomes.
本発明は、本発明の趣旨を逸脱しない範囲において種々の連続酸洗設備に適用することができる。 The present invention can be applied to various continuous pickling facilities without departing from the spirit of the present invention.
１ 連続酸洗設備
１０ 酸洗槽
１１ 廃液ダクト
１２ 廃液ピット
１３ 洗浄ユニット
１４ 残量検出ユニット
１５ 操作室
２０ 底部
２１ 壁部
２２ 開口
２３ 蓋部
２４ 廃液口
３０ 洗浄ノズル
３１ ポンプ
３２ 配管
３３ バルブ
４０ 分岐管
４１ 計測槽
４２ ＰＨ計
５０ 酸洗槽
５１ 鉄皮タンク
５２ ライニング材
５３ レンガ
５４ 吸引ダクト
５５ 底面
５６ 孔
５７ 吸引口
DESCRIPTION OF SYMBOLS 1 Continuous pickling equipment 10 Pickling tank 11 Waste liquid duct 12 Waste liquid pit 13 Cleaning unit 14 Residual amount detection unit 15 Operation room 20 Bottom part 21 Wall part 22 Opening 23 Lid part 24 Waste liquid port 30 Cleaning nozzle 31 Pump 32 Piping 33 Valve 40 Branch Pipe 41 Measuring tank 42 PH meter 50 Pickling tank 51 Iron skin tank 52 Lining material 53 Brick 54 Suction duct 55 Bottom face 56 Hole 57 Suction port
Claims (2)
前記酸性薬液を貯留する耐酸性樹脂製の酸洗槽と、
前記酸洗槽の内部に配設されて洗浄液を放出する洗浄ノズルと、
前記酸洗槽を貫通して前記酸洗槽の外部から前記洗浄ノズルに洗浄液を供給する配管と、を備える
ことを特徴とする酸洗設備。 Pickling equipment for pickling steel strips with acidic chemicals,
A pickling tank made of acid-resistant resin for storing the acidic chemical solution;
A cleaning nozzle that is disposed inside the pickling tank and discharges the cleaning liquid;
A pickling facility comprising: a pipe that passes through the pickling tank and supplies a cleaning liquid to the cleaning nozzle from the outside of the pickling tank.
前記廃液路に排出される前記廃液のｐｈ値を計測することにより前記酸洗槽に残された前記酸性薬液の量を間接的に検出する残量検出手段と、を更に備える、
請求項１に記載の酸洗設備。 A waste liquid path for discharging a waste liquid containing the cleaning liquid and the acidic chemical liquid from the pickling tank;
A remaining amount detecting means for indirectly detecting the amount of the acidic chemical liquid left in the pickling tank by measuring the ph value of the waste liquid discharged into the waste liquid path;
The pickling equipment according to claim 1.
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| JP2010107439A JP5778394B2 (en) | 2010-05-07 | 2010-05-07 | Pickling equipment and processing method when washing equipment is stopped |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160140641A (en) | 2014-03-28 | 2016-12-07 | 아사히 유키자이 가부시키가이샤 | Propylene resin composition, and product selected from tank and piping material molded from propylene resin composition |
| CN110158102A (en) * | 2019-06-06 | 2019-08-23 | 江苏沙钢集团有限公司 | A kind of quick acid discharge descaling bath and application method |
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| JPH10140375A (en) * | 1996-11-07 | 1998-05-26 | Mitsubishi Chem Corp | Device for continuously surface-treating aluminum strip and method for cleaning aluminum strip |
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2010
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61210195A (en) * | 1985-03-13 | 1986-09-18 | Ishikawajima Harima Heavy Ind Co Ltd | Pickling tank |
| JPH10140375A (en) * | 1996-11-07 | 1998-05-26 | Mitsubishi Chem Corp | Device for continuously surface-treating aluminum strip and method for cleaning aluminum strip |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160140641A (en) | 2014-03-28 | 2016-12-07 | 아사히 유키자이 가부시키가이샤 | Propylene resin composition, and product selected from tank and piping material molded from propylene resin composition |
| CN110158102A (en) * | 2019-06-06 | 2019-08-23 | 江苏沙钢集团有限公司 | A kind of quick acid discharge descaling bath and application method |
| CN110158102B (en) * | 2019-06-06 | 2023-09-19 | 江苏沙钢集团有限公司 | Quick acid discharge pickling tank and use method thereof |
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