JP2000239731A - Treatment of cooling in vacuum degassing apparatus - Google Patents
Treatment of cooling in vacuum degassing apparatusInfo
- Publication number
- JP2000239731A JP2000239731A JP11037067A JP3706799A JP2000239731A JP 2000239731 A JP2000239731 A JP 2000239731A JP 11037067 A JP11037067 A JP 11037067A JP 3706799 A JP3706799 A JP 3706799A JP 2000239731 A JP2000239731 A JP 2000239731A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- cooling water
- thickener
- cooling drainage
- drainage
- 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.)
- Withdrawn
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、溶融金属の真空脱
ガス装置の冷却水処理方法に関し、特に、一定時間内に
おける所定値以上の温度変化が測定された時に、排水の
ダスト濃度が変化したものとして、水処理方法を切替る
ための新規な改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating cooling water in a vacuum degassing apparatus for molten metal, and more particularly, when a temperature change of a predetermined value or more within a certain time is measured, the dust concentration of waste water changes. As such, it relates to new improvements for switching water treatment methods.
【０００２】[0002]
【従来の技術】従来、真空脱ガス装置において操業時に
は、鍋中の溶融金属が真空槽内に吸上げられ、溶融金属
中のガスがエゼクターにて吹き込まれる蒸気と共に大気
放散される。そのときコンデンサで冷却水にこの蒸気が
凝縮されると同時に冷却水に飛散ダストも混入してい
た。第１従来例としては、この真空脱ガス装置の冷却水
のダスト量の推定は、真空脱ガス装置の蒸気の吹き込み
を示す信号によって推定していた。また、第２従来例の
特開平６−２２９６９８号公報においては、この脱ガス
処理開始直後５〜１０分間の排水の水温上昇を排水分別
のきっかけとしていた。また、第３従来例の真空脱ガス
装置においては、操業により発生した冷却水は冷却排水
ラインを通過し、冷却水のダスト量に関わらずシックナ
ーへ流れる。このシックナーにおいては、水とダストと
の比重の違いを利用しダストを沈降分離している。次に
シックナーをオーバーフローした冷却水は回収槽に集め
られ、冷却塔で冷却され再びコンデンサで冷却水として
使用される。さらに、第４従来例としては、真空脱ガス
装置の操業により変動する冷却水のダスト量に関わらず
常時シックナーへの薬剤注入を行っていた。2. Description of the Related Art Conventionally, during operation in a vacuum degassing apparatus, molten metal in a pan is sucked into a vacuum chamber, and gas in the molten metal is released to the atmosphere together with steam blown by an ejector. At that time, the vapor was condensed in the cooling water by the condenser and, at the same time, scattering dust was mixed in the cooling water. As a first conventional example, the estimation of the amount of dust in the cooling water of the vacuum degassing device is performed by a signal indicating the injection of steam from the vacuum degassing device. Further, in Japanese Patent Application Laid-Open No. 6-229698 of the second conventional example, a rise in the temperature of the wastewater for 5 to 10 minutes immediately after the start of the degassing treatment is used as a trigger for the separation of the wastewater. In the third prior art vacuum degassing apparatus, the cooling water generated by the operation passes through the cooling drainage line and flows to the thickener regardless of the amount of cooling water dust. In this thickener, dust is settled and separated using the difference in specific gravity between water and dust. Next, the cooling water overflowing the thickener is collected in a recovery tank, cooled in a cooling tower, and used again as cooling water in a condenser. Further, as a fourth conventional example, chemicals are constantly injected into the thickener regardless of the amount of cooling water dust that fluctuates due to the operation of the vacuum degassing device.
【０００３】[0003]
【発明が解決しようとする課題】従来の真空脱ガス装置
の冷却水処理方法は、以上のように構成されていたた
め、次のような課題が存在していた。前述の第１従来例
の場合、真空脱ガス装置の真空処理中に冷却排水のダス
ト量が多くこれを検知するにはエゼクター蒸気吹込の信
号から推測するため、検出精度が低くなっていた。また
水処理設備は工場内の真空脱ガス装置から離れた屋外へ
設置されるものであり、冷却排水中のダスト濃度を推定
し対応する為には、エゼクター蒸気吹込の信号を長距離
の配線を用いて送る必要があった。また、第２従来例の
場合、脱ガス処理開始直後の５〜１０分間の排水の水温
上昇を排水分別のきっかけとしていたため、開始直後の
みに限らず、その後の処理中の測定を行うことができな
かった。また、第３従来例においては、これまでの間欠
運転する溶融金属処理設備の真空脱ガス装置において、
操業状態によって変動する冷却排水中のダスト濃度に関
わらず一定の水処理を行っており、水処理効率が悪かっ
た。さらに、第４従来例においては、間欠運転する溶融
金属処理設備の真空脱ガス装置において、操業状態によ
って変動する冷却排水中のダスト濃度に関わらず一定量
の薬剤の注入を行っており薬剤使用に無駄があった。Since the conventional cooling water treatment method for the vacuum degassing apparatus is configured as described above, there are the following problems. In the case of the above-mentioned first conventional example, the amount of dust in the cooling wastewater is large during the vacuum processing of the vacuum degassing apparatus, and it is inferred from the signal of the ejector vapor injection to detect this, so that the detection accuracy is low. Water treatment equipment is installed outdoors away from the vacuum degassing equipment in the factory.To estimate and respond to dust concentration in cooling wastewater, the signal from the ejector steam injection must be sent over long distances. Had to be sent using. Further, in the case of the second conventional example, the rise in the temperature of the wastewater for 5 to 10 minutes immediately after the start of the degassing process was used as a trigger for the separation of the wastewater, so that the measurement during the subsequent process is not limited to just after the start. could not. Further, in the third conventional example, in the vacuum degassing apparatus of the molten metal processing equipment which is operated intermittently so far,
Constant water treatment was performed irrespective of the dust concentration in the cooling wastewater that fluctuated depending on the operating conditions, and the water treatment efficiency was poor. Furthermore, in the fourth conventional example, in the vacuum degassing device of the molten metal processing equipment that operates intermittently, a certain amount of the chemical is injected regardless of the dust concentration in the cooling wastewater that varies depending on the operation state, and the chemical is used. There was waste.
【０００４】本発明は、以上のような課題を解決するた
めになされたもので、特に、一定時間内における所定値
以上の温度変化が測定された時に、排水のダスト濃度が
変化したものとして、ダスト濃度に合わせた水処理方法
に切替える効率的な真空脱ガス装置の冷却水処理方法を
提供することを目的とする。The present invention has been made in order to solve the above-mentioned problems. In particular, when the temperature change of a predetermined value or more within a certain period of time is measured, it is considered that the dust concentration of the wastewater changes. It is an object of the present invention to provide an efficient cooling water treatment method for a vacuum degassing device that switches to a water treatment method that matches the dust concentration.
【０００５】[0005]
【課題を解決するための手段】本発明による真空脱ガス
装置の冷却水処理方法は、間欠運転する真空槽を含む真
空脱ガス装置の冷却水処理方法において、前記真空脱ガ
ス装置の冷却排水温度の一定時間内における所定値以上
の温度変化が測定された時、水処理排水経路をシックナ
ーと回収槽とで切替える方法であり、前記温度変化は、
前記真空脱ガス装置とシックナー間の経路に設けられた
温度計で測定する方法であり、前記一定時間内における
所定値以上の温度下降が測定された時、前記冷却水への
薬剤を注入を停止又は低減させる方法である。According to the present invention, there is provided a method for treating cooling water in a vacuum degassing apparatus, comprising the steps of: When a temperature change of a predetermined value or more within a predetermined time is measured, a method of switching a water treatment drainage path between a thickener and a collection tank, wherein the temperature change is:
This is a method of measuring with a thermometer provided in a path between the vacuum degassing device and the thickener, and when the temperature drop of a predetermined value or more within the predetermined time is measured, stopping the injection of the chemical into the cooling water. Alternatively, it is a method of reducing.
【０００６】[0006]
【発明の実施の形態】以下、図面と共に本発明による真
空脱ガス装置の冷却水処理方法の好適な実施の形態につ
いて説明する。図１は本発明方法に用いる真空脱ガス装
置の冷却水処理系を示すものである。図１において、符
号１で示されるものは鍋であり、この鍋１の上部には真
空槽２を有する真空脱ガス装置２Ａが配設されている。
この真空槽２には蒸気４が供給される構成の３連型のエ
ゼクター３を介して第１コンデンサ５が接続され、この
第１コンデンサ５には第２コンデンサ１８を介して放散
筒１２を有するアフターコンデンサ１９が直列接続さ
れ、各コンデンサ６，１８及び１９には冷却塔１１から
の冷却水６が第１ポンプＰ1により供給されるように配
管１１ａが構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a method for treating cooling water of a vacuum degassing apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 shows a cooling water treatment system of a vacuum degassing apparatus used in the method of the present invention. In FIG. 1, a pan indicated by reference numeral 1 is a pan, and a vacuum degassing device 2 </ b> A having a vacuum tank 2 is disposed above the pan 1.
A first condenser 5 is connected to the vacuum tank 2 via a triple ejector 3 configured to supply steam 4, and the first condenser 5 has a diffusion tube 12 via a second condenser 18. After the capacitor 19 are connected in series, the cooling water 6 from the cooling tower 11 to the condenser 6, 18 and 19 pipe 11a is configured to be supplied by the first pump P 1.
【０００７】前記各コンデンサ６，１８及び１９に共通
接続された管路３０に接続された冷却排水ライン７に
は、温度計１７が接続されていると共に、回収槽切替バ
ルブ１５を有する冷却排水／回収槽ライン８が回収槽１
０に接続され、シックナー切替バルブ１６を介してシッ
クナー９に接続されている。このシックナー９には、薬
剤注入装置１３がポンプＰ2及び薬剤注入切替バルブ１
４を介して接続されていると共に、このシックナー９が
前記回収槽１０に接続されている。さらに、この回収槽
１０は、ポンプＰ3を介して前記冷却塔１１へ接続され
ている。A cooling water drain line 7 connected to a pipe 30 commonly connected to the condensers 6, 18 and 19 is connected to a thermometer 17 and also has a cooling water drain / return valve 15 having a recovery tank switching valve 15. Collection tank line 8 is collection tank 1
0 and connected to the thickener 9 via the thickener switching valve 16. The thickener 9 includes a drug injection device 13 including a pump P 2 and a drug injection switching valve 1.
4 and the thickener 9 is connected to the collecting tank 10. Moreover, the recovery tank 10 is connected to the cooling tower 11 via a pump P 3.
【０００８】前記温度計１７は、図２のフローシートに
示すように前記温度計１７の現状の冷却排水水温の第１
測定値Ｔ１と５分前の冷却排水水温の第２測定値Ｔ０の
差を計算しこれが５℃以上の上昇・下降した場合を検知
し、上昇時には操業が開始し、冷却排水中のダスト量が
増加したことを、下降時には操業が終了し冷却排水中の
ダスト量が減少したことをそれぞれ検出するように構成
されている。本発明は以上の構成よりなっている。従っ
て、真空脱ガス装置２Ａの処理中は図３に示すように真
空度が下がるにつれて第１コンデンサ５、第２コンデン
サ１８、アフターコンデンサ１９からの排水水温は上昇
する。この冷却水温度の急激な上昇を温度計１７と図示
しない制御部によって検知する。次に真空処理中は溶融
金属の入った鍋１に接する真空槽２内のガスがエゼクタ
ー３にて吹き込まれ、蒸気４が放散筒１２から大気放散
される。そのとき第１コンデンサ５で冷却水６にて使用
蒸気４が凝縮されると同時に冷却水６に飛散ダストも混
入し、冷却排水水温と冷却排水ダスト量とは図４に示す
ような相関となる。従って、冷却水温度の急激な上昇に
より温度計１７と図２に示す検知システムによって真空
処理中で冷却排水中のダスト量が増加したことを認知す
ることができ、また冷却水温度の急激が下降も温度計１
７と図２に示す検知システムによって検知し、真空処理
後の冷却排水中のダスト量が減少したことを認知するこ
とができるように構成されている。[0008] As shown in the flow sheet of FIG.
The difference between the measured value T1 and the second measured value T0 of the cooling drainage water temperature 5 minutes ago is calculated, and when this rises or falls by 5 ° C. or more, the operation starts when the temperature rises, and the amount of dust in the cooling drainage is reduced. It is configured to detect that the increase has been detected, and that the operation has ended and the amount of dust in the cooling drainage has decreased when descending. The present invention has the above configuration. Therefore, during the processing of the vacuum degassing device 2A, as shown in FIG. 3, as the degree of vacuum decreases, the temperature of the water discharged from the first condenser 5, the second condenser 18, and the after condenser 19 rises. This rapid rise in the cooling water temperature is detected by the thermometer 17 and a control unit (not shown). Next, during the vacuum processing, the gas in the vacuum tank 2 in contact with the pot 1 containing the molten metal is blown by the ejector 3, and the vapor 4 is released from the diffusion tube 12 to the atmosphere. At this time, the used steam 4 is condensed by the cooling water 6 in the first condenser 5, and at the same time, scattered dust is mixed into the cooling water 6, and the temperature of the cooling water and the amount of the cooling water dust have a correlation as shown in FIG. . Accordingly, it is possible to recognize that the amount of dust in the cooling wastewater has increased during the vacuum processing by the thermometer 17 and the detection system shown in FIG. 2 due to the rapid rise of the cooling water temperature, and the rapid decrease of the cooling water temperature. Also thermometer 1
7 and the detection system shown in FIG. 2 so that it is possible to recognize that the amount of dust in the cooling water after the vacuum treatment has decreased.
【０００９】次に、本発明方法の動作について述べる。
まず、真空処理開始後、溶融金属処理設備の真空処理中
の冷却排水温度の急激な上昇は温度計１７と図２に示す
検知システムによって検知され、シックナー９経路へ冷
却排水が流れるようにシックナー切替バルブ１６の切替
を行う。また、真空処理後の冷却水温度の急激な下降も
温度計１７と図２に示す検知システムによって検知さ
れ、回収槽１０経路へ冷却排水が流れるように回収槽切
替バルブ１５の切替を行う。これにより冷却水ダスト量
が多いときは、シックナー９へ冷却水排水経路を切り替
え、冷却水ダスト量が少ないときは排水経路を回収槽１
０へ切り替える。従って、ダスト量の多い冷却水はダス
ト量の少ない冷却水がシックナー９を通過しない時間分
だけ長くシックナー９滞留時間を稼げる、この滞留時間
を長くすることによってより沈降速度の遅いダストまで
沈降分離を行うことが可能となり、ダスト量の多い冷却
水のダスト分離効率を高めることができる。Next, the operation of the method of the present invention will be described.
First, after the start of the vacuum processing, a rapid rise in the temperature of the cooling water during vacuum processing of the molten metal processing equipment is detected by the thermometer 17 and the detection system shown in FIG. The valve 16 is switched. In addition, a sharp drop in the cooling water temperature after the vacuum processing is also detected by the thermometer 17 and the detection system shown in FIG. 2, and the recovery tank switching valve 15 is switched so that the cooling drainage flows to the recovery tank 10 path. Thereby, when the amount of cooling water dust is large, the cooling water drainage path is switched to the thickener 9, and when the amount of cooling water dust is small, the drainage path is changed to the collection tank 1.
Switch to 0. Therefore, the cooling water having a large amount of dust can increase the residence time of the thickener 9 by the time during which the cooling water having a small amount of dust does not pass through the thickener 9. By increasing the residence time, the sedimentation and separation of the dust having a lower sedimentation speed can be performed. As a result, the dust separation efficiency of the cooling water having a large amount of dust can be increased.
【００１０】さらに、前記温度計１７による冷却排水の
温度測定は真空処理開始後から真空処理終了迄の間の任
意の５分間（５分に限ることはない）における所定値以
上の温度変化を検出するように構成されている。図２に
おいて、真空脱ガス処理開始から終了迄の任意の５分間
において、現状の冷却排水水温の第２測定値Ｔ１と５分
前の冷却排水水温の第１測定値Ｔ０とが検出され（第
１、第２ステップ１００、１０１）、各測定値Ｔ０とＴ
１が比較される（第３ステップ１０２）。△Ｔ＞５℃の
場合、真空処理開始（第４ステップ１０３）され、ダス
ト量が増加し（第５ステップ１０４）、冷却排水をシッ
クナー９へ排水し（第６ステップ１０５）、薬剤注入開
始（第７ステップ１０６）となる。また、５℃＞△Ｔ＞
−５℃の場合、現状維持（第８ステップ１０７）とな
る。また、−５℃＞△Ｔの場合、真空処理終了（第９ス
テップ１０８）となり、ダスト量が減り（第１０ステッ
プ１０９）、冷却排水が回収槽１０へ回収され（第１１
ステップ１１０）、薬剤の注入を終了する（第１２ステ
ップ１１１）。前述の形態では、真空処理開始時、途
中、真空処理終了時を測定した温度の測定値において検
出したが、真空処理開始直後だけではなく、処理開始後
の任意の時間経過時においてもこの間欠運転される真空
脱ガス装置のダスト量の状態を一定時間（例えば５分
間）内における所定値以上（例えば５℃）の温度上昇、
下降により、薬剤の注入と注入終了を行うことができ
る。Further, the temperature measurement of the cooling waste water by the thermometer 17 detects a temperature change of a predetermined value or more in an arbitrary five minutes (not limited to five minutes) from the start of the vacuum processing to the end of the vacuum processing. It is configured to be. In FIG. 2, during an arbitrary five minutes from the start to the end of the vacuum degassing process, a second measured value T1 of the current cooling drain water temperature and a first measured value T0 of the cooling drain water temperature five minutes before are detected (No. 1, second steps 100, 101), each measured value T0 and T
1 are compared (third step 102). If ΔT> 5 ° C., vacuum processing is started (fourth step 103), the amount of dust is increased (fifth step 104), cooling water is drained to the thickener 9 (sixth step 105), and chemical injection is started ( The seventh step 106) is performed. Also, 5 ° C> △ T>
In the case of −5 ° C., the current state is maintained (eighth step 107). If −5 ° C.> ΔT, the vacuum processing ends (ninth step 108), the amount of dust decreases (tenth step 109), and the cooling wastewater is collected in the collection tank 10 (eleventh step).
Step 110), the injection of the drug is terminated (twelfth step 111). In the above-described embodiment, the intermittent operation is detected not only immediately after the start of the vacuum processing but also at an arbitrary time after the start of the vacuum processing. The state of the amount of dust of the vacuum degassing device to be heated to a predetermined value (for example, 5 ° C.) or more within a predetermined time (for example, 5 minutes);
By descending, the injection of the medicine and the end of the injection can be performed.
【００１１】従って、本発明によれば、溶融金属処理設
備の真空処理中のダスト濃度に合わせた無駄のない薬剤
注入が行える。また、溶融金属処理設備の真空脱ガス処
理中の冷却排水温度の急激な上昇を温度計１７と図２に
示す検知システムによって検知し、薬剤注入切替バルブ
１４を開く。また真空脱ガス処理後の冷却排水温度の急
激な下降も温度計１７と図２に示す検知システムによっ
て検知し、薬剤注入切替バルブ１４を閉じる。これによ
り現状最もダスト量の多い状態に合わせて、薬剤注入量
を決定しているものが冷却排水ダスト量が多いときだけ
それにあった薬剤注入を行うので薬剤量の無駄を減らす
ことができる。Therefore, according to the present invention, it is possible to inject chemicals without waste according to the dust concentration during the vacuum processing of the molten metal processing equipment. Also, a rapid rise in the temperature of the cooling water during vacuum degassing of the molten metal processing equipment is detected by the thermometer 17 and the detection system shown in FIG. 2, and the chemical injection switching valve 14 is opened. Further, a rapid decrease in the temperature of the cooling waste water after the vacuum degassing process is also detected by the thermometer 17 and the detection system shown in FIG. In this way, according to the state in which the amount of dust is currently the largest, the one in which the amount of injected chemical is determined is injected only when the amount of cooling wastewater dust is large, so that waste of the amount of chemical can be reduced.
【００１２】[0012]
【発明の効果】本発明による真空脱ガス装置の冷却水処
理方法は、以上のように構成されているため、次のよう
な効果を得ることができる。すなわち、シックナー又は
回収槽への冷却排水の温度を直接検出しているため、水
処理設備の内部にて冷却排水中のダスト濃度を推定する
ことが可能となった。 本発明により従来と同じシック
ナーでより長いダスト沈降分離時間を得られる為、水処
理効率が上がり冷却塔内部の充填材の詰まりや配管の詰
まり、ポンプの摩耗の低下の効果が得られる。本発明に
より操業中の一定時間内に所定値以上の温度降下があっ
た場合に薬剤注入を停止させ、ダスト濃度に合わせて適
正な薬剤注入が行えるため、薬剤使用の無駄が減らせ
る。The method for treating the cooling water of the vacuum degassing apparatus according to the present invention is configured as described above, so that the following effects can be obtained. That is, since the temperature of the cooling wastewater to the thickener or the recovery tank is directly detected, it is possible to estimate the dust concentration in the cooling wastewater inside the water treatment facility. According to the present invention, a longer dust settling / separation time can be obtained with the same thickener as in the prior art, so that the water treatment efficiency is increased, and the effects of clogging of the filler inside the cooling tower, clogging of the pipes, and wear of the pump are reduced. According to the present invention, when the temperature drops by a predetermined value or more within a certain period of time during operation, the injection of the medicine is stopped, and the appropriate injection of the medicine can be performed in accordance with the dust concentration.
【図１】本発明による真空脱ガス装置の冷却水処理方法
を示す構成図である。FIG. 1 is a configuration diagram showing a method for treating cooling water of a vacuum degassing apparatus according to the present invention.
【図２】本発明における検知システムのフロー図であ
る。FIG. 2 is a flowchart of a detection system according to the present invention.
【図３】脱ガス設備操業における冷却水水温と操業時間
との関係を示す特性図である。FIG. 3 is a characteristic diagram showing a relationship between cooling water temperature and operation time in degassing equipment operation.
【図４】冷却排水中の水温と冷却排水中のダスト量の相
関特性図である。FIG. 4 is a correlation characteristic diagram of a water temperature in cooling water and a dust amount in cooling water.
２ 真空槽 ２Ａ 真空脱ガス装置 ３ エゼクタ ９ シックナー １７ 温度計 2 vacuum chamber 2A vacuum degassing device 3 ejector 9 thickener 17 thermometer
Claims (3)
(2)を含む真空脱ガス装置の冷却水処理方法において、
前記真空脱ガス装置(2)の冷却排水温度の一定時間内に
おける所定値以上の温度変化が測定された時、水処理排
水経路をシックナー(9)と回収槽(10)とで切替ることを
特徴とする真空排気装置の冷却水処理方法。1. A vacuum tank of a molten metal processing facility that operates intermittently.
In the cooling water treatment method of the vacuum degassing device including (2),
When a change in the temperature of the cooling water discharged from the vacuum degassing device (2) within a predetermined time period is measured over a predetermined value, the water treatment drainage path is switched between the thickener (9) and the recovery tank (10). A method for treating cooling water for a vacuum exhaust device.
(2)とシックナー(9)間の経路に設けられた温度計(17)で
測定することを特徴とする請求項１記載の真空脱ガス装
置の冷却水処理方法。2. The method according to claim 1, wherein the temperature change is performed by the vacuum degassing device.
The cooling water treatment method for a vacuum degassing apparatus according to claim 1, wherein the temperature is measured by a thermometer (17) provided in a path between (2) and the thickener (9).
度下降が測定された時、前記冷却水への薬剤の注入を停
止又は低減させることを特徴とする請求項１又は２記載
の真空脱ガス装置の冷却水処理方法。3. The vacuum degassing according to claim 1, wherein the injection of the chemical into the cooling water is stopped or reduced when a temperature drop of a predetermined value or more within the predetermined time is measured. Cooling water treatment method for equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11037067A JP2000239731A (en) | 1999-02-16 | 1999-02-16 | Treatment of cooling in vacuum degassing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11037067A JP2000239731A (en) | 1999-02-16 | 1999-02-16 | Treatment of cooling in vacuum degassing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000239731A true JP2000239731A (en) | 2000-09-05 |
Family
ID=12487216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11037067A Withdrawn JP2000239731A (en) | 1999-02-16 | 1999-02-16 | Treatment of cooling in vacuum degassing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000239731A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002310573A (en) * | 2001-04-11 | 2002-10-23 | Nippon Steel Corp | Apparatus and method for treating exhaust gas |
| CN114364640A (en) * | 2020-01-31 | 2022-04-15 | 栗田工业株式会社 | Method and apparatus for treating converter waste gas dust collecting water |
-
1999
- 1999-02-16 JP JP11037067A patent/JP2000239731A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002310573A (en) * | 2001-04-11 | 2002-10-23 | Nippon Steel Corp | Apparatus and method for treating exhaust gas |
| CN114364640A (en) * | 2020-01-31 | 2022-04-15 | 栗田工业株式会社 | Method and apparatus for treating converter waste gas dust collecting water |
| EP4098343A4 (en) * | 2020-01-31 | 2022-12-28 | Kurita Water Industries Ltd. | Method for treating dust-collected water for exhaust gas in converter, and device for treating dust-collected water for exhaust gas in converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20060509 |