JPS6321755B2 - - Google Patents
Info
- Publication number
- JPS6321755B2 JPS6321755B2 JP58029094A JP2909483A JPS6321755B2 JP S6321755 B2 JPS6321755 B2 JP S6321755B2 JP 58029094 A JP58029094 A JP 58029094A JP 2909483 A JP2909483 A JP 2909483A JP S6321755 B2 JPS6321755 B2 JP S6321755B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- pretreatment
- wash water
- washing
- chemical
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 83
- 239000000126 substance Substances 0.000 claims description 60
- 238000005406 washing Methods 0.000 claims description 40
- 238000004140 cleaning Methods 0.000 claims description 21
- 239000003599 detergent Substances 0.000 description 29
- 239000000243 solution Substances 0.000 description 25
- 238000005238 degreasing Methods 0.000 description 22
- 239000007788 liquid Substances 0.000 description 17
- 238000011282 treatment Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 239000004094 surface-active agent Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 7
- 238000003860 storage Methods 0.000 description 7
- 238000002203 pretreatment Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- -1 alkalis Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Chemical Treatment Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
【発明の詳細な説明】
本発明は前処理装置に係り、特にバツチ式の前
処理のための薬液及び前処理完了後の洗浄のため
の洗浄水をそれぞれ循環供給すべく構成された前
処理装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pretreatment device, and particularly to a pretreatment device configured to circulate and supply a chemical solution for batch-type pretreatment and washing water for cleaning after completion of pretreatment. Regarding.
金属製品等の表面に塗装或いはメツキ処理など
を施す際には、通常被処理面の清浄化及び素地調
整の目的で酸、アルカリ洗い、脱脂或いは化成膜
形成などの前処理が施され、次いで前処理に用い
た薬液が水洗によつて除去される。 When painting or plating the surface of metal products, etc., pretreatments such as acid or alkaline washing, degreasing, or chemical film formation are usually performed for the purpose of cleaning and preparing the surface. The chemical solution used for pretreatment is removed by washing with water.
このような前処理は、敷地面積に制約がある場
合にはバツチ方式で行われることが多く、同一の
前処理室内で各バツチ処理毎に薬液による前処理
及び洗浄水による水洗が反復される。 Such pretreatment is often carried out in batches when site area is limited, and pretreatment with a chemical solution and washing with washing water are repeated for each batch treatment in the same pretreatment room.
前処理に用いられる酸，アルカリ，界面活性剤
及び化成液等の薬液は、薬液タンクから循環的に
供給され、また前処理後、製品に付着した楽液を
次工程に持ち越させぬよう洗浄するためにもちい
られる洗浄水も公害防止の目的から専用のタンク
から循環的に供給されて所定の期間に亘つて反復
使用される。 Chemical solutions such as acids, alkalis, surfactants, and chemical liquids used for pretreatment are supplied cyclically from a chemical tank, and after pretreatment, products are washed to prevent any adhering solutions from carrying over to the next process. The cleaning water used for this purpose is also cyclically supplied from a dedicated tank and used repeatedly over a predetermined period of time for the purpose of pollution prevention.
したがつて、各バツチ処理での薬液処理完了直
後の洗浄に用いられた水は比較的高濃度の薬液を
含んでおり、反復使用するにつれて洗浄水タンク
内の水が次第に薬液によつて汚染され充分な洗浄
効果が得られらくなつてしまう。 Therefore, the water used for cleaning immediately after the completion of chemical treatment in each batch treatment contains a relatively high concentration of chemical, and as it is repeatedly used, the water in the cleaning water tank becomes gradually contaminated with the chemical. It becomes difficult to obtain a sufficient cleaning effect.
このため、大容量の洗浄水タンクの水を比較的
短期間で交換しなければならず、これは水資源の
利用上及び廃水処理設備の負担増大の点から好ま
しくない。 Therefore, the water in the large-capacity wash water tank must be replaced in a relatively short period of time, which is undesirable from the standpoint of using water resources and increasing the burden on wastewater treatment equipment.
そこで本発明は、このような従来装置の欠点に
着目し、前処理薬液の混入による洗浄水の汚染を
極力低下させることのできる前処理装置を提供す
ることを目的とするものであり、そのためにバツ
チ式前処理室に対して前処理のための薬液を循環
供給する薬液タンクと、前処理完了後の洗浄のた
めに洗浄水を循環供給する洗浄水タンクとを配設
した前処理装置において、前記前処理室から前記
洗浄水タンクに戻る洗浄水の循環帰路の一部に洗
浄初期の所要時間に亘つて洗浄水の流路を装置の
排水系側に切り換える流路切換機構が介装された
ことを特徴とする。 SUMMARY OF THE INVENTION The present invention focuses on the drawbacks of conventional devices, and aims to provide a pretreatment device that can minimize contamination of washing water due to contamination with pretreatment chemicals. In a pretreatment device that is equipped with a chemical solution tank that circulates and supplies a chemical solution for pretreatment to a batch-type pretreatment chamber, and a wash water tank that circulates and supplies cleaning water for cleaning after completion of the pretreatment, A flow path switching mechanism for switching the flow path of the wash water to the drainage system side of the apparatus is interposed in a part of the wash water circulation path returning from the pre-treatment chamber to the wash water tank for a required period of time in the initial stage of washing. It is characterized by
以下、本発明を図面に示す実施例に基づいて説
明する。 Hereinafter, the present invention will be explained based on embodiments shown in the drawings.
第１図は、本発明を金属製品の塗装の前処理の
一工程を成す脱脂処理に適用した場合の前処理装
置の一例概要を示す工程図である。 FIG. 1 is a process diagram showing an example of a pretreatment apparatus in which the present invention is applied to degreasing treatment, which is a step of pretreatment for painting metal products.
バツチ式の前処理室１は金属製品をコンベア等
の適宜な搬送手段によつて図中矢印Ａ方向に沿つ
て搬入し、前処理室１内において脱脂処理を施し
た後、矢印Ｂ方向に沿つて次工程（図示はしない
が、本例ではリン酸塩化成処理工程）に搬出する
ように成されている。 In the batch-type pretreatment chamber 1, metal products are carried in along the direction of arrow A in the figure by a suitable conveyor such as a conveyor, and after being degreased in the pretreatment chamber 1, metal products are carried in along the direction of arrow B in the pretreatment chamber 1. It is then transported to the next process (not shown, but in this example, a phosphate chemical treatment process).
前処理室１には、前処理のため脱脂薬液として
の界面活性剤（例えばアルカリ性洗剤）を循環供
給するための薬液タンク２と、脱脂処理完了後に
金属制品及び前処理室１の内部に残存するアルカ
リ性洗剤を洗浄するための洗浄水を循環供給する
ための一段目の洗浄水タンク３及び二段目の洗浄
水タンク４とがそれぞれ配設されている。 The pretreatment chamber 1 includes a chemical tank 2 for circulating and supplying a surfactant (e.g., an alkaline detergent) as a degreasing chemical for pretreatment, and a chemical tank 2 for circulating and supplying a surfactant (for example, an alkaline detergent) as a degreasing chemical for pretreatment, and a chemical solution tank 2 for circulating and supplying a surfactant (for example, an alkaline detergent) as a degreasing chemical solution, and a chemical solution tank 2 for circulating and supplying a surfactant (for example, an alkaline detergent) as a degreasing chemical solution, and a chemical solution tank 2 for circulating and supplying a surfactant (for example, an alkaline detergent) as a degreasing chemical solution, and a chemical solution tank 2 for circulating and supplying a surfactant (for example, an alkaline detergent) as a degreasing chemical solution, and a chemical solution tank 2 for circulating and supplying a surfactant (for example, an alkaline detergent) as a degreasing chemical solution, and a chemical solution tank 2 for circulating and supplying a surfactant (for example, an alkaline detergent) as a degreasing chemical solution. A first-stage wash water tank 3 and a second-stage wash water tank 4 are provided, respectively, for circulating and supplying wash water for washing the alkaline detergent.
薬液タンク２からの供給口は給液ポンプＰ１及
び開閉バルブＶ１を有する循環往路ａによつて前
処理室１の噴出ノズル５に接続され、また前処理
室１の排出口６は開閉バルブＶ２を有する循環帰
路ｂを介して薬液タンク２の戻り口に接続されて
いる。 The supply port from the chemical tank 2 is connected to the ejection nozzle 5 of the pretreatment chamber 1 by a circulation path a having a supply pump P1 and an on-off valve V1, and the outlet 6 of the pre-treatment chamber 1 is connected to an on-off valve V2. It is connected to the return port of the chemical solution tank 2 via a circulation return path b.
図中、７はボイラ（図示せず）からの温水によ
つて薬液タンク２内のアルカリ性洗剤を加温する
ステンレス鋼製のヒータ管であり、また８は溶剤
温度を検出する温度センサ、９は溶剤の液位を検
出する液面計であつて、これらの検出出力信号は
適宜な制御装置（図示せず）に接続されている。 In the figure, 7 is a stainless steel heater tube that heats the alkaline detergent in the chemical tank 2 with hot water from a boiler (not shown), 8 is a temperature sensor that detects the solvent temperature, and 9 is a The liquid level gauge detects the liquid level of the solvent, and these detection output signals are connected to an appropriate control device (not shown).
なお、薬液タンク２の底部排出口は定期的な薬
液交換のために開閉バルブを介して排水溝１０に
接続されている。 The bottom outlet of the chemical liquid tank 2 is connected to a drain 10 via an on-off valve for periodic chemical liquid exchange.
第一段目の洗浄水タンク３からの出口はポンプ
Ｐ２及び開閉バルブＶ３を有する循環往路ｃによ
つて前処理室１の噴出ノズル５に接続され、また
前処理室１の排出口６は開閉バルブＶ４を有する
循環帰路ｄを介して第一段目の洗浄水タンク３の
戻り口に接続されている。そして、この洗浄水タ
ンク３の底部排出口もまた開閉バルブを介して排
水溝１０に接続されている。 The outlet from the first-stage wash water tank 3 is connected to the jet nozzle 5 of the pretreatment chamber 1 by a circulation path c having a pump P2 and an on-off valve V3, and the outlet 6 of the pretreatment chamber 1 is opened and closed. It is connected to the return port of the first-stage wash water tank 3 via a circulation return path d having a valve V4. The bottom outlet of the wash water tank 3 is also connected to the drain 10 via an on-off valve.
第二段目の洗浄水タンク４は洗浄に際して前記
第一段目の洗浄水タンク３による一次水洗に引き
続く二次水洗を行うためのタンクであり、ポンプ
Ｐ３及び開閉バルブＶ５を含む循環往路ｅ並びに
開閉バルブＶ６を含む循環帰路ｆを介して前処理
室１に接続されており、その態様は第一段目の洗
浄水タンク３の場合と同様である。 The second-stage wash water tank 4 is a tank for performing secondary washing following the primary washing by the first-stage wash water tank 3 during washing, and includes a circulation path e including a pump P3 and an on-off valve V5, and It is connected to the pretreatment chamber 1 via a circulation return path f including an on-off valve V6, and its mode is similar to that of the first-stage wash water tank 3.
ここで本実施例においては、前処理室１の排出
口６から洗浄水タンク３の戻り口に至る循環帰路
ｄの途中、即ち開閉バルブＶ４の接続点に排水溝
１０に連通する開閉バルブVsが並設されており、
これら開閉バルブＶ４及びVsはいずれも制御装
置（図示せず）から送られてくるプロセス信号に
よつて限時動作するそれぞれのスイツチLsによつ
て交互に開閉制御されるべく成されている。 In this embodiment, an on-off valve V s communicating with the drain 10 is placed in the middle of the circulation return path d from the discharge port 6 of the pre-treatment chamber 1 to the return port of the wash water tank 3, that is, at the connection point of the on-off valve V4 . are installed in parallel,
These opening/closing valves V4 and Vs are alternately controlled to open and close by respective switches Ls that operate for a limited time in response to process signals sent from a control device (not shown).
即ち、排水溝１０に連通する管路側の開閉バル
ブVsはアルカリ性洗剤による脱脂工程が完了し
て前処理室１の排出口６から薬液タンク２に至る
循環帰路ｂの開閉バルブＶ２が閉じられてから後
の所要時間に亘つてのみ開放されるように制御さ
れており、一方洗浄水タンク３に連通する側の循
環帰路ｄの開閉バルブＶ４は開閉バルブVsの所
定の開放時間の終了後より洗浄処理のための所要
時間に亘つてのみ開放されるように制御されてい
る。 That is, the on-off valve V s on the pipe side communicating with the drain 10 is closed when the degreasing process using the alkaline detergent is completed and the on-off valve V 2 on the circulation return path b from the outlet 6 of the pretreatment chamber 1 to the chemical tank 2 is closed. On the other hand, the on-off valve V4 of the circulation return path d on the side communicating with the wash water tank 3 is controlled to be opened only for the required time after the end of the predetermined opening time of the on-off valve Vs. It is controlled to be opened only for the time required for the cleaning process.
したがつて、これら開閉バルブＶ４及びVsは
前処理室１から第一段目の洗浄水タンク３への循
環帰路ｄの間に接続されて該循環帰路ｄを洗浄の
初期の所要時間中は排水溝１０側の管路に、そし
てその後の洗浄期間中は洗浄タンク３側の管路で
ある循環帰路ｄにそれぞれ切換接続する流路切換
機構を構成する。 Therefore, these on-off valves V4 and Vs are connected between the circulation return path d from the pretreatment chamber 1 to the first-stage wash water tank 3, and the circulation return path d is closed during the initial period of washing. A flow path switching mechanism is configured to switch and connect to the pipe on the drainage ditch 10 side and, during the subsequent cleaning period, to the circulation return path d, which is the pipe on the cleaning tank 3 side.
なお、この流路切換機構としては二つの開閉バ
ルブＶ４及びVsの代わりに排水溝１０及び洗浄
水タンク３側のそれぞれの管路の分岐点にブレー
ドを回動可能に配設し、それによつて各管路を交
互に開閉するようにした所謂ハツチ機構を採用し
ても良く、この場合には排水溝１０側の開放状態
において残存していた混合液が洗浄水タンク３側
の開放時に一部流入するという欠点はあるものの
構造的には切換機構を或程度簡略化し得るという
利点がある。 In addition, as for this flow path switching mechanism, instead of the two on-off valves V4 and Vs , blades are rotatably disposed at the branch points of the respective pipes on the drain 10 and wash water tank 3 sides. A so-called hatch mechanism may be adopted in which each pipe is opened and closed alternately, and in this case, the mixed liquid remaining when the drain groove 10 side is open is completely removed when the wash water tank 3 side is opened. Although there is a disadvantage that a portion of the liquid flows in, there is an advantage in terms of structure that the switching mechanism can be simplified to some extent.
また、本実施例における前記以外の開閉バルブ
Ｖ１，Ｖ２，Ｖ３，Ｖ４，Ｖ５及びＶ６の開閉制
御も、前記と同様にして制御装置からのプロセス
信号によつてこれを行うことができる。 Further, the opening/closing control of the opening/closing valves V1, V2, V3, V4, V5, and V6 other than those described above in this embodiment can be performed in the same manner as described above using process signals from the control device.
更に、これら各開閉バルブの制御はシーケンス
制御とすることもできる。 Furthermore, the control of each of these opening/closing valves can also be sequence control.
以上が本発明の一実施例の構成であり、次にそ
の動作について説明すると、薬液タンク２内にア
ルカリ性洗剤等の脱脂薬液がボイラ等の加熱源か
らヒータ管７に送給される約70℃の温水によつて
所定温度に加温され、ポンプＰ１によつて開閉バ
ルブＶ１を介して前処理室１内の噴出ノズル５か
ら噴出される。このようにして前処理室１に搬入
された金属製品の脱脂に供されたアルカリ性洗剤
等の薬液は排出口６から排出され、開閉バルブＶ
２を通つて薬液タンク２に戻される。そして、所
要時間に亘つてアルカリ性洗剤等の薬液を前処理
室１中に循環させて脱脂が完了すると、開閉バル
ブＶ１及びＶ２が閉じられポンプＰ１も停止す
る。 The above is the configuration of one embodiment of the present invention. Next, the operation will be explained. A degreasing chemical solution such as an alkaline detergent is fed into the chemical tank 2 from a heat source such as a boiler to the heater pipe 7 at a temperature of about 70° C. The hot water is heated to a predetermined temperature by the hot water, and is ejected from the ejection nozzle 5 in the pretreatment chamber 1 via the on-off valve V1 by the pump P1. The chemical liquid such as alkaline detergent used for degreasing the metal products carried into the pretreatment chamber 1 in this way is discharged from the discharge port 6, and the on-off valve V
2 and is returned to the chemical solution tank 2. Then, when degreasing is completed by circulating a chemical solution such as an alkaline detergent into the pretreatment chamber 1 for a required period of time, the on-off valves V1 and V2 are closed and the pump P1 is also stopped.
次いで、第一段目の洗浄水タンク３からの洗浄
水がポンプＰ２により開閉バルブＶ３を介して前
処理室１の噴出ノズル５に圧注されて水洗処理が
開始される。 Next, the washing water from the first-stage washing water tank 3 is injected into the jet nozzle 5 of the pretreatment chamber 1 by the pump P2 via the on-off valve V3, and the washing process is started.
水洗処理の初期には、前処理室１及び金属製品
表面に残留するアルカリ性洗剤や溶質が洗浄水中
に相当高濃度で含有され、これが排出口６から第
一段目の洗浄水タンク３への循環帰路ｄ側に流出
される。 At the beginning of the washing process, alkaline detergents and solutes remaining in the pretreatment chamber 1 and on the surface of the metal products are contained in the washing water at a considerably high concentration, and this is circulated from the discharge port 6 to the first stage washing water tank 3. It flows out to the return path d side.
ここで、従来では前述の通りこのような洗浄水
とアルカリ性洗剤との混合液をそのまま洗浄水タ
ンク３に戻していたので該洗浄水タンク３内の洗
浄水が次第にアルカリ性洗剤等により汚染されて
しまうこととなるが、本発明では洗浄水中のトリ
クレン等の薬液濃度が比較的高い水洗初期時に洗
浄水タンク３側の管路タンク３側の管路に連なる
開閉バルブＶ４を閉じて汚染された洗浄水タンク
３に戻らないようにしておくと共に、排水溝１０
側の管路に連なる開閉バルブVsだけを開放して
汚染された洗浄水を直接排水溝１０に放出させ
る。 Here, in the past, as described above, such a mixture of wash water and alkaline detergent was directly returned to the wash water tank 3, so the wash water in the wash water tank 3 gradually became contaminated with the alkaline detergent, etc. However, in the present invention, the on-off valve V4 connected to the pipe line on the side of the washing water tank 3 is closed at the beginning of washing when the concentration of chemicals such as trichlene in the washing water is relatively high, and the contaminated washing water is removed. Make sure that it does not return to the tank 3, and drain the drain 10.
Only the on-off valve Vs connected to the side pipe is opened to discharge contaminated wash water directly into the drain 10.
次いで、所要時間が経過して前処理室１内に殆
どアルカリ性洗剤が残存しなくなつてから開閉バ
ルブVsを閉じ、代わつて開閉バルブＶ４を開放
して汚れの少なくなつた洗浄水を洗浄水タンク３
側に戻すようにし、この状態で所要時間に亘つて
一次水洗を施す。その後、第一段目の洗浄水タン
ク３の循環往路ｃ及び循環帰路ｄのポンプＰ２を
停止すると共に各開閉バルブＶ３及びＶ４を閉
じ、代わりに第二段目の洗浄水タンク４の循環往
路ｅ及び循環帰路ｆの各開閉バルブＶ５及びＶ６
を開放すると共にポンプＰ３を作動させてより清
浄且つ新鮮な洗浄水による二次水洗を所要時間に
亘つて施す。 Next, after the required time has elapsed and almost no alkaline detergent remains in the pretreatment chamber 1, the on-off valve Vs is closed, and the on-off valve V4 is opened instead, so that the washing water with less dirt is transferred to the washing water. tank 3
Put it back on the side, and perform the primary washing with water for the required time in this state. Thereafter, the pump P2 of the circulation outward path c and the circulation return path d of the first-stage cleaning water tank 3 is stopped, and each of the on-off valves V3 and V4 is closed, and the circulation path e of the second-stage cleaning water tank 4 is replaced instead. and each opening/closing valve V5 and V6 of the circulation return path f.
At the same time, the pump P3 is operated to perform secondary washing using cleaner and fresher washing water for a required period of time.
これにより脱脂処理が完了し、ポンプＰ３を停
止して開閉バルブＶ５及びＶ６を閉じると共に、
金属製品を前処理室１から矢印Ｂ方向に沿つて次
工程の化成処理へと移行させる。 This completes the degreasing process, stops pump P3, closes on-off valves V5 and V6, and
The metal products are transferred from the pretreatment chamber 1 along the direction of arrow B to the next step of chemical conversion treatment.
以上のように、本実施例においては前処理室１
に対して脱脂のためのアルカリ性洗剤を循環供給
する薬液タンク２と、脱脂後の水洗のための洗浄
水を循環供給するための洗浄水タンク３とをそれ
ぞれ設けた前処理装置において、前処理室１の排
出口６から洗浄水タンク３に向かう循環帰路ｄの
途中に流路切換機構としての開閉バルブＶ４及び
Vsを設け、水洗処理の初期には排水溝１０に連
なる開閉バルブVsが又その後の水洗処理の間に
おいては洗浄水タンク３に連なる開閉バルブＶ４
がそれぞれ開放するように交互に開閉制御してあ
るので、水洗初期の比較的アルカリ性洗剤濃度の
高い排出口６からの洗浄水は排出溝１０に排出さ
れて洗浄水タンク３に戻されない。 As described above, in this embodiment, the pretreatment chamber 1
In a pretreatment device, a pretreatment chamber is provided with a chemical tank 2 for circulating and supplying an alkaline detergent for degreasing, and a wash water tank 3 for circulating and supplying wash water for washing after degreasing. An on-off valve V4 as a flow path switching mechanism is installed in the middle of the circulation return path d from the discharge port 6 of No. 1 to the cleaning water tank 3.
V s is provided, and an on-off valve V s connected to the drain groove 10 is provided at the beginning of the washing process, and an on-off valve V 4 connected to the wash water tank 3 during the subsequent washing process.
Since these are controlled to open and close alternately so that they are respectively opened, the wash water from the outlet 6, which has a relatively high concentration of alkaline detergent in the early stage of washing, is discharged to the drain groove 10 and is not returned to the wash water tank 3.
したがつて、第一段目の洗浄水タンク３の水質
を従来装置に比較してはるかに長時間に亘つて極
めて良好に維持し効果的な水洗を行うことができ
ると同時に、その結果として比較的大容量の洗浄
水タンク３の水を頻繁に交換する必要がなくな
り、水資源の有効な利用を可能にすると共に廃水
処理の負担を軽減し得るという効果がある。 Therefore, it is possible to maintain the water quality of the first-stage washing water tank 3 in an extremely good condition for a much longer period of time compared to conventional equipment, and to perform effective water washing. This eliminates the need to frequently replace the water in the large-capacity wash water tank 3, making effective use of water resources possible and reducing the burden of wastewater treatment.
ところで、前述の水洗処理初期時に開閉バルブ
Vsから排水溝１０に放出されるアルカリ性洗剤
と水との混合液の量はさほど多くないので廃水処
理上殆ど問題とはならないが、できれば省資源の
目的から高濃度のアルカタ性洗剤についてはこれ
を直接排水溝１０に放出せずに回収して再利用を
図ることが望ましい。 By the way, at the beginning of the water washing process mentioned above, the on-off valve
The amount of the mixed solution of alkaline detergent and water discharged from the V s into the drain 10 is not so large that it poses almost no problem in wastewater treatment. It is desirable to collect and reuse the waste without directly discharging it into the drainage ditch 10.
第２図はそのための装置の一例を示し、この具
体的な構成及び動作は基本的には第１図で説明し
た装置と略同様であり、したがつてその詳細説明
は省略して一次水洗処理の初期に排出される高ア
ルカリ性洗剤を含有した洗浄水の利用に関する要
部のみについて説明する。 Fig. 2 shows an example of a device for this purpose, and its specific configuration and operation are basically similar to the device explained in Fig. 1, so detailed explanation thereof will be omitted. Only the main parts related to the use of wash water containing highly alkaline detergent discharged at the beginning of the process will be explained.
前述第１図に示す前処理室１の排出口６から洗
浄水タンク３に向かう循環帰路ｄの途中に開閉バ
ルブＶ４と共に並設された開閉バルブVsは、本
例では直接排水溝１０には接続されず、一時貯留
タンク１１の注入口に接続されている。 In this example, the on-off valve Vs , which is installed in parallel with the on-off valve V4 on the circulation return path d from the outlet 6 of the pretreatment chamber 1 to the wash water tank 3 shown in FIG. It is not connected, but is connected to the inlet of the temporary storage tank 11.
一時貯留タンク１１の排出口１２はポンプＰ４
を介して薬液タンク２に接続され、また一時貯留
タンク１１のオーバフローを排水する溢流管１３
が排水溝１０側に接続されている。 The discharge port 12 of the temporary storage tank 11 is the pump P4.
An overflow pipe 13 is connected to the chemical tank 2 via the tank 2 and drains overflow from the temporary storage tank 11.
is connected to the drainage ditch 10 side.
本実施例においては、各バツチ処理毎の一次水
洗の初期時に開閉バルブVsを介して流出される
アルカリ性洗剤濃度の高い洗浄水は一時貯留タン
ク１１に貯留される。一方、薬液タンク２中のア
ルカリ性洗剤は、前処理室１内での脱脂に用いら
れたアルカリ水洗剤が循環回収しきれずに一部は
前記の如く水洗処理の際に洗浄水中に採り込ま
れ、また一部はそのまま次工程に持ち越され、且
つ薬液タンク２自体中でも加温により絶えず蒸発
するため、その量が次第に減少する。 In this embodiment, the wash water having a high concentration of alkaline detergent, which flows out through the on-off valve Vs at the initial stage of the primary washing for each batch process, is temporarily stored in the storage tank 11. On the other hand, as for the alkaline detergent in the chemical solution tank 2, the alkaline water detergent used for degreasing in the pretreatment chamber 1 cannot be recycled and recovered, and a part of it is taken into the washing water during the water washing process as described above. Further, a portion is carried over to the next step as it is, and is constantly evaporated in the chemical liquid tank 2 itself due to heating, so that the amount thereof gradually decreases.
このため、従来はその補給のために定期的（一
般に日に数回程度）に水及び薬品を薬液タンク２
に注入していた。 For this reason, in the past, water and chemicals were periodically (generally several times a day) added to the chemical tank to replenish them.
was injected into.
これに対し、本実施例において薬液タンク２内
の液位が所定のレベルより低下して液面計９がこ
れを検知した際に、一時貯留タンク１１のポンプ
Ｐ４が作動せられ、アルカリ性洗剤と水との混合
液が一時貯留タンク１１から薬液タンク２にその
液位が所定値になるまで自動的に供給される。 On the other hand, in this embodiment, when the liquid level in the chemical liquid tank 2 falls below a predetermined level and the liquid level gauge 9 detects this, the pump P4 of the temporary storage tank 11 is activated to remove the alkaline detergent. The liquid mixture with water is automatically supplied from the temporary storage tank 11 to the chemical liquid tank 2 until the liquid level reaches a predetermined value.
したがつて、一次洗浄の際にそのまま排出され
ていたアルカリ性洗剤を含む廃水の処理負担が軽
減されると共に、単に水及び薬品を薬液タンクに
補給する場合に比較して薬液中のアルカリ性洗剤
濃度をより高く維持して脱脂効果の低下を防止す
ることができ、無駄に廃棄されていた溶剤の有効
利用を図ることができるという効果がある。 Therefore, the burden of processing wastewater containing alkaline detergent that is discharged as is during primary cleaning is reduced, and the concentration of alkaline detergent in the chemical solution can be reduced compared to simply replenishing water and chemicals to the chemical tank. It is possible to maintain the degreasing effect at a higher level to prevent deterioration of the degreasing effect, and it is possible to effectively utilize the solvent that would have been wasted.
以上、本実施例ではアルカリ性洗剤洗浄による
脱脂処理について説明したが、処理薬剤としては
場合に応じてその他の有機溶剤や界面活性剤等を
用いることもでき、更に脱脂処理に限らず酸、ア
ルカリ洗い或いは化成処理など薬液処理と水洗処
理とが組合せて施される一般の前処理にも広く適
用することができる。 In this example, degreasing treatment using alkaline detergent cleaning has been explained, but other organic solvents, surfactants, etc. can be used as the treatment agent depending on the case, and the treatment is not limited to degreasing treatment, but also acid and alkaline cleaning. Alternatively, it can be widely applied to general pretreatments such as chemical conversion treatments in which a chemical treatment and a water washing treatment are performed in combination.
以上述べたように、本発明装置によれば前処理
に際して薬液処理完了後の水洗処理を何等支障な
く効果的に行うことができる。 As described above, according to the apparatus of the present invention, the water washing process after the completion of the chemical liquid treatment can be effectively performed without any problems during the pretreatment.
第１図は本発明の一実施例の概要を示すブロツ
ク図、第２図は本発明の他の実施例の概要を示す
ブロツク図である。
符号の説明、１…前処理室、２…薬液タンク、
３…第一段目の洗浄水タンク、４…第二段目の洗
浄水タンク、５…噴出ノズル、６…排出口、７…
ヒータ管、８…温度センサ、９…液面計、１０…
排水溝、１１…一時貯留タンク。
FIG. 1 is a block diagram showing an outline of one embodiment of the present invention, and FIG. 2 is a block diagram showing an outline of another embodiment of the invention. Explanation of symbols, 1... Pretreatment chamber, 2... Chemical tank,
3... First stage cleaning water tank, 4... Second stage cleaning water tank, 5... Spout nozzle, 6... Outlet, 7...
Heater tube, 8...Temperature sensor, 9...Liquid level gauge, 10...
Drainage ditch, 11...Temporary storage tank.
Claims (1)
液を循環供給する薬液タンクと、前処理完了後の
洗浄のために洗浄水を循環供給する洗浄水タンク
とを配設した前処理装置において、前記前処理室
から前記洗浄水タンクに戻る洗浄水の循環帰路の
一部に洗浄初期の所要時間に亘つて洗浄水の流路
を装置の排水系側に切り換える流路切換機構が介
装されたことを特徴とする前処理装置。1. In a pretreatment device equipped with a chemical solution tank that circulates and supplies a chemical solution for pretreatment to a batch-type pretreatment chamber, and a wash water tank that circulates and supplies cleaning water for cleaning after completion of pretreatment. , a flow path switching mechanism is interposed in a part of the circulation return path of the wash water returning from the pretreatment chamber to the wash water tank to switch the flow path of the wash water to the drainage system side of the apparatus for a period of time required in the initial stage of washing. A pretreatment device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2909483A JPS59153887A (en) | 1983-02-22 | 1983-02-22 | Pretreating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2909483A JPS59153887A (en) | 1983-02-22 | 1983-02-22 | Pretreating apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59153887A JPS59153887A (en) | 1984-09-01 |
| JPS6321755B2 true JPS6321755B2 (en) | 1988-05-09 |
Family
ID=12266762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2909483A Granted JPS59153887A (en) | 1983-02-22 | 1983-02-22 | Pretreating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59153887A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008135464A (en) * | 2006-11-27 | 2008-06-12 | Matsushita Electric Works Ltd | Processing apparatus for wiring board and processing method employing it |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6292100U (en) * | 1985-11-29 | 1987-06-12 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5576092A (en) * | 1978-11-25 | 1980-06-07 | Agfa Gevaert Ag | Anodized aluminium roller having improved electric conductivity and production |
-
1983
- 1983-02-22 JP JP2909483A patent/JPS59153887A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5576092A (en) * | 1978-11-25 | 1980-06-07 | Agfa Gevaert Ag | Anodized aluminium roller having improved electric conductivity and production |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008135464A (en) * | 2006-11-27 | 2008-06-12 | Matsushita Electric Works Ltd | Processing apparatus for wiring board and processing method employing it |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59153887A (en) | 1984-09-01 |
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