JPH02310386A - Method for recovering hydrochloric acid in steel material pickling device - Google Patents
Method for recovering hydrochloric acid in steel material pickling deviceInfo
- Publication number
- JPH02310386A JPH02310386A JP13035089A JP13035089A JPH02310386A JP H02310386 A JPH02310386 A JP H02310386A JP 13035089 A JP13035089 A JP 13035089A JP 13035089 A JP13035089 A JP 13035089A JP H02310386 A JPH02310386 A JP H02310386A
- Authority
- JP
- Japan
- Prior art keywords
- hydrochloric acid
- tank
- water
- pickling
- exhaust
- 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.)
- Granted
Links
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 238000005554 pickling Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 11
- 239000010959 steel Substances 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000011084 recovery Methods 0.000 claims abstract description 27
- 239000002699 waste material Substances 0.000 claims abstract description 24
- 239000003595 mist Substances 0.000 claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims abstract description 19
- 238000010521 absorption reaction Methods 0.000 claims abstract description 17
- 238000012856 packing Methods 0.000 claims abstract description 6
- 239000000567 combustion gas Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 19
- 239000002253 acid Substances 0.000 claims description 12
- 239000000945 filler Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 10
- 239000007921 spray Substances 0.000 abstract description 9
- 238000012546 transfer Methods 0.000 abstract description 3
- 239000012141 concentrate Substances 0.000 abstract description 2
- 239000008400 supply water Substances 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method 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
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/36—Regeneration of waste pickling liquors
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)
Abstract
Description
【発明の詳細な説明】 Ａ、産業上の利用分野 本発明は、鋼材酸洗装置の塩酸回収方法に関する。[Detailed description of the invention] A. Industrial application field The present invention relates to a method for recovering hydrochloric acid from a steel pickling device.
Ｂ、従来の技術
塩酸を用いて酸洗する普通鋼、特殊鋼等の酸洗ラインに
おいてはヒユーム（塩酸ミスト含有ガス）を吸引し、水
洗浄して無害化する排気洗浄装置が設置される。この排
気洗浄装置がら発生する排出液中の塩酸濃度は通常１０
ｙ／１以下であり、薄いため利用されず、苛性ソーダや
水酸化力ルシュウム等で中和処分されるのが一般的であ
った。他方、塩酸廃液に対しては塩酸回収設備が併設さ
れ、廃液を燃焼し、そのガスを吸収塔で水洗して塩酸分
を回収していた。B. Conventional technology In the pickling line for ordinary steel, special steel, etc., which is pickled using hydrochloric acid, an exhaust cleaning device is installed to suck in fume (gas containing hydrochloric acid mist) and wash it with water to make it harmless. The concentration of hydrochloric acid in the effluent generated from this exhaust cleaning equipment is usually 10
Y/1 or less, and because it is thin, it is not used and is generally disposed of by neutralizing it with caustic soda, lucium hydroxide, etc. On the other hand, for hydrochloric acid waste liquid, a hydrochloric acid recovery facility was installed, the waste liquid was burned, and the gas was washed with water in an absorption tower to recover the hydrochloric acid content.
Ｃ９発明が解決しようとする課題
しかしながら、前記ヒユーム分は回収されず損失となっ
ていた。C9 Problems to be Solved by the Invention However, the hume portion was not recovered and resulted in a loss.
本発明は排気洗浄により廃棄されている塩酸の回収およ
び吸収塔での上部シャワーの補給水の節減をはかること
を目的とする。The purpose of the present invention is to recover discarded hydrochloric acid by exhaust gas cleaning and to save makeup water for the upper shower in an absorption tower.
０１課題を解決するための手段
この目的を達成するため、本発明の構成は次のとおりと
する。即ち、酸洗槽からの排気を排気ダクトおよび排気
ファンを介して排気洗浄装置に導入し、充填物を介して
水と接触させ、洗浄された排気を排気し、洗浄塔下部に
溜まった混合水に水を補給して循環ポンプで前記充填物
の上方に循環散布し、下部より希薄酸を取り出し、前記
酸洗槽の廃液を焙焼炉に導いて燃焼し、その燃焼ガスを
吸収塔内の下部充填物の下方に導入し、上部充填物の上
方に給水タンクからの補給水を散布し、前記吸収塔の下
部に溜まった混合水を回収タンクに導出し、該回収タン
クの混合水を循環ポンプを介して前記上部・下部充填物
の中間に散布して濃縮する鋼材酸洗装置の塩酸回収方法
において、前記排気ダクトの途中にミストセパレータを
設け、塩酸分を分離してミストタンクに溜め、該ミスト
タンクの濃厚回収酸を前記廃液塩酸回収装置の回収タン
クに導いて前記循環ポンプで循環させて濃縮し、前記排
気洗浄装置からの希薄酸を前記廃液塩酸回収装置の給水
タンクに導いて前記上部充填物の上方に散布することで
ある。01 Means for Solving the Problems In order to achieve this object, the configuration of the present invention is as follows. That is, the exhaust gas from the pickling tank is introduced into the exhaust cleaning device through the exhaust duct and the exhaust fan, is brought into contact with water through the filling, and the cleaned exhaust gas is exhausted, and the mixed water collected at the bottom of the cleaning tower is removed. water is replenished and distributed above the packing using a circulation pump, the dilute acid is taken out from the bottom, the waste liquid from the pickling tank is led to the roasting furnace, where it is combusted, and the combustion gas is transferred to the absorption tower. The water is introduced below the lower packing, the make-up water from the water tank is sprayed above the upper packing, the mixed water collected at the bottom of the absorption tower is led to a recovery tank, and the mixed water in the recovery tank is circulated. In a method for recovering hydrochloric acid for a steel material pickling device in which the hydrochloric acid is distributed and concentrated between the upper and lower fillers via a pump, a mist separator is provided in the middle of the exhaust duct to separate and store hydrochloric acid in a mist tank; The concentrated recovered acid in the mist tank is led to the recovery tank of the waste hydrochloric acid recovery device and circulated by the circulation pump to be concentrated, and the dilute acid from the exhaust cleaning device is led to the water supply tank of the waste hydrochloric acid recovery device and concentrated. Spray above the top filling.
Ｅ０作用
酸洗槽からの排気はミストセパレータによりミストを除
去されて排気洗浄塔に送られ、その底部に塩酸の希薄液
が溜まる。また、ミストセパレータからの濃廃液は回収
タンクへ投入され、循環ポンプにより吸収塔内を循環す
ることにより、塩酸濃度を規定の濃度まで高める。一方
、前記希薄廃液は不足分の補給水が加えられた後、吸収
塔の頂部から散布され循環ポンプにより吸収塔内を循環
し、所定の塩酸濃度の回収酸として回収される。The exhaust gas from the E0 action pickling tank has its mist removed by a mist separator and is sent to the exhaust cleaning tower, where a dilute solution of hydrochloric acid is collected at the bottom. In addition, the concentrated waste liquid from the mist separator is put into a recovery tank and circulated through the absorption tower by a circulation pump to increase the concentration of hydrochloric acid to a specified concentration. On the other hand, after supplementary water is added to the diluted waste liquid, it is sprayed from the top of the absorption tower, circulated through the absorption tower by a circulation pump, and recovered as recovered acid having a predetermined hydrochloric acid concentration.
Ｆ、実施例
以下、本発明の実施態様を図面に示す一実施例にもとづ
き説明する。F. Example Hereinafter, embodiments of the present invention will be explained based on an example shown in the drawings.
酸洗槽１ａからの排気を排気ダクトＤおよび排気ファン
Ｆを介して排気洗浄装置１０に導入する。Exhaust air from the pickling tank 1a is introduced into the exhaust cleaning device 10 via an exhaust duct D and an exhaust fan F.
ここで充填物１１ｂを介して水と接触させ、洗浄された
排気を上方に排気し、洗浄塔１１の下部に溜まった混合
水は補給水管１４から補給される水と共に、循環ポンプ
１２で前記充填物の上方にスプレー管１１ｃで循環散布
して、排ガス中の塩酸分を吸収し、希薄酸となり、前記
混合水を回収タンク１３に導出する。Here, the water is brought into contact with water through the filling material 11b, and the cleaned exhaust gas is exhausted upward, and the mixed water accumulated at the bottom of the cleaning tower 11 is filled with water by the circulation pump 12 together with the water replenished from the makeup water pipe 14. It is circulated and sprayed above the object using a spray pipe 11c, absorbs hydrochloric acid in the exhaust gas, becomes a diluted acid, and leads out the mixed water to the recovery tank 13.
また、前記酸洗槽１ａの廃液を廃液タンク２１を経て、
焙焼炉２２に導いて燃焼し、その燃焼ガスを吸収塔２３
内の下部充填物２３ｄの下方に導入する。ここで上部充
填物２３ｂの上方に給水タンク２４からの水をポンプ６
を介して上部スプレー管２３ｃで散布し、前記吸収塔の
下部に溜まった混合水を回収タンク２５に導出し、該回
収タンクの混合水を循環ポンプ２６を介して前記上部・
下部充填物２３ｂ、２３ｄの中間に下部スプレー管２３
ｅで散布して濃縮する。Further, the waste liquid from the pickling tank 1a is passed through the waste liquid tank 21,
The combustion gas is led to a roasting furnace 22 and burned, and the combustion gas is transferred to an absorption tower 23.
It is introduced below the lower filling 23d in the interior. Here, the pump 6 pumps water from the water tank 24 above the upper filling 23b.
The mixed water accumulated in the lower part of the absorption tower is led out to the recovery tank 25, and the mixed water in the recovery tank is sent to the upper part through the circulation pump 26.
A lower spray pipe 23 is installed between the lower fillers 23b and 23d.
Scatter and concentrate with e.
さてここで、前記排気ダクトＤの途中にミストセパレー
タ２を設けて塩酸分を分離し、これをミストタンク３に
溜める。そして、ミス１へタンクの濃厚回収酸を廃液塩
酸回収装置の回収タンク２５に導いて循環ポンプ２６で
循環させて濃縮する。Now, a mist separator 2 is provided in the middle of the exhaust duct D to separate hydrochloric acid and store it in a mist tank 3. Then, the concentrated recovered acid in the tank for Miss 1 is introduced into the recovery tank 25 of the waste liquid hydrochloric acid recovery device, and is circulated by the circulation pump 26 to be concentrated.
また、排気洗浄装置の回収タンク１３の希薄酸を廃液塩
酸回収装置の給水タンク２４に導いて上部充填物２３ｂ
の上方に散布する。In addition, the dilute acid in the recovery tank 13 of the exhaust cleaning device is led to the water supply tank 24 of the waste liquid hydrochloric acid recovery device to fill the upper filling 23b.
Spread above.
このように本発明は排気洗浄装置１０および塩酸回収装
置２０を持った系において、より多くの塩酸を回収する
方法をテストを重ね見いだしたものである。As described above, the present invention was developed through repeated tests to find a method for recovering more hydrochloric acid in a system having the exhaust gas cleaning device 10 and the hydrochloric acid recovery device 20.
次に作用について説明する。排気ダクトＤの中において
温度降下があることから、ヒユームの一部は液体および
ミストとなる。これをミストセパレータ２で分離・薬液
する。実施例では１００〜１５０ｇ／ｉ！の塩酸濃度の
濃廃液を２０〜３０ｉ／ｈ得ることができた。このよう
にあらかじめミストセパレータ２によりミストを除去す
ると、排気洗浄塔１１から出る希薄液の塩酸濃度は若干
下がるが、実施例では３〜６．５ｇ／ｌ、３５００１／
ｈであった、濃廃液は回収タンク２５へ投入され、循環
ポンプ２６により吸収塔内を循環することにより、塩酸
濃度を規定の濃度まで高める。この濃廃液は量的に少な
いため回収系の液量バランスを崩すことはない、一方、
希薄廃液は前述のように不足分の補給水が加えられた後
、吸収塔２３の頂部から散布され循環ポンプ２６により
吸収塔内を循環し、所定の塩酸濃度の回収酸しとて回収
される。Next, the effect will be explained. Due to the temperature drop in the exhaust duct D, part of the fume becomes liquid and mist. The mist separator 2 separates this into a chemical solution. In the example, 100 to 150 g/i! It was possible to obtain 20 to 30 i/h of concentrated waste liquid with a hydrochloric acid concentration of . If the mist is removed in advance by the mist separator 2 in this way, the concentration of hydrochloric acid in the diluted liquid discharged from the exhaust cleaning tower 11 will decrease slightly, but in the example it is 3 to 6.5 g/l, 35001/l.
The concentrated waste liquid, which was 1 h, is put into the recovery tank 25 and circulated through the absorption tower by the circulation pump 26, thereby increasing the hydrochloric acid concentration to a specified concentration. Since this concentrated waste liquid is small in quantity, it will not disrupt the liquid volume balance of the recovery system.
After supplementary water is added to the diluted waste liquid as described above, it is sprayed from the top of the absorption tower 23, circulated within the absorption tower by the circulation pump 26, and recovered as recovered acid with a predetermined hydrochloric acid concentration. .
本発明は前記した実施例や実施態様に限定されず、特許
請求の範囲の精神および範囲を逸脱せずに種々の変形を
含む。The present invention is not limited to the embodiments and embodiments described above, but includes various modifications without departing from the spirit and scope of the claims.
Ｇ１発明の効果
本発明の構成により、酸洗槽からのヒユームの塩酸分が
回収されて有効に再利用できることとなっ−た。G1 Effects of the Invention According to the structure of the present invention, the hydrochloric acid content of the hume from the pickling tank can be recovered and effectively reused.
図は本発明方法の実施に使用される装置の系統図である
。
１ａ・・・酸洗槽、
Ｄ・・・排気ダクト、Ｆ・・・排気ファン、２・・・ミ
ストセパレータ、３・・・ミストタンク、４・・・移送
ポンプ、５・・・補給水管、６・・・移送ポンプ１０・
・・排気洗浄装置
１１・・・洗浄塔
１１ａ・・・本体
１１ｂ・・・充填物
１１ｃ・・・スプレー管
１２・・・循環ポンプ
１３・・・回収タンク
１４・・・補給水管
２０・・・廃液塩酸回収装置
２１・・・廃液タンク
２２・・・焙焼炉
２３・・・吸収塔
２３ａ・・・本体
２３ｂ・・・上部充填物
２３ｃ・・・上部スプレー管
２３ｄ・・・下部充填物
２３ｅ・・・下部スプレー管
２４・・・給水タンク
２５・・・回収タンク
２６・・・循環ポンプThe figure is a system diagram of the apparatus used to carry out the method of the invention. 1a... Pickling tank, D... Exhaust duct, F... Exhaust fan, 2... Mist separator, 3... Mist tank, 4... Transfer pump, 5... Supply water pipe, 6... Transfer pump 10.
...Exhaust cleaning device 11...Cleaning tower 11a...Main body 11b...Filling material 11c...Spray pipe 12...Circulation pump 13...Recovery tank 14...Makeup water pipe 20... Waste liquid hydrochloric acid recovery device 21... waste liquid tank 22... roasting furnace 23... absorption tower 23a... main body 23b... upper filling 23c... upper spray pipe 23d... lower filling 23e ... Lower spray pipe 24 ... Water supply tank 25 ... Recovery tank 26 ... Circulation pump
Claims (1)
て排気洗浄装置に導入し、充填物を介して水と接触させ
、洗浄された排気を排気し、洗浄塔下部に溜まった混合
水に水を補給して循環ポンプで前記充填物の上方に循環
散布し、下部より希薄酸を取り出し、前記酸洗槽の廃液
を焙焼炉に導いて燃焼し、その燃焼ガスを吸収塔内の下
部充填物の下方に導入し、上部充填物の上方に給水タン
クからの補給水を散布し、前記吸収塔の下部に溜まった
混合水を回収タンクに導出し、該回収タンクの混合水を
循環ポンプを介して前記上部・下部充填物の中間に散布
して濃縮する鋼材酸洗装置の塩酸回収方法において、前
記排気ダクトの途中にミストセパレータを設け、塩酸分
を分離してミストタンクに溜め、該ミストタンクの濃厚
回収酸を前記廃液塩酸回収装置の回収タンクに導いて前
記循環ポンプで循環させて濃縮し、前記排気洗浄装置か
らの希薄酸を前記廃液塩酸回収装置の給水タンクに導い
て前記上部充填物の上方に散布することを特徴とする鋼
材酸洗装置の塩酸回収方法。The exhaust air from the pickling tank is introduced into the exhaust cleaning equipment through the exhaust duct and the exhaust fan, is brought into contact with water through the filling, and the cleaned exhaust air is exhausted, and the water is added to the mixed water collected at the bottom of the cleaning tower. The diluted acid is replenished and distributed above the packing using a circulation pump, the dilute acid is taken out from the bottom, the waste liquid from the pickling tank is led to the roasting furnace and burned, and the combustion gas is sent to the bottom filling in the absorption tower. Make-up water from the water tank is sprayed above the upper filling, the mixed water collected at the bottom of the absorption tower is led to a recovery tank, and the mixed water in the recovery tank is passed through a circulation pump. In a method for recovering hydrochloric acid for a steel material pickling device, in which the hydrochloric acid is dispersed between the upper and lower fillers through a filter and concentrated, a mist separator is provided in the middle of the exhaust duct, the hydrochloric acid is separated and stored in a mist tank, and the mist is The concentrated recovered acid in the tank is led to the recovery tank of the waste hydrochloric acid recovery device and circulated by the circulation pump to be concentrated, and the dilute acid from the exhaust cleaning device is led to the water supply tank of the waste hydrochloric acid recovery device to fill the upper part. A method for recovering hydrochloric acid from a steel pickling device, which is characterized by spraying it above the object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1130350A JP2596830B2 (en) | 1989-05-23 | 1989-05-23 | Hydrochloric acid recovery method of steel pickling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1130350A JP2596830B2 (en) | 1989-05-23 | 1989-05-23 | Hydrochloric acid recovery method of steel pickling equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02310386A true JPH02310386A (en) | 1990-12-26 |
| JP2596830B2 JP2596830B2 (en) | 1997-04-02 |
Family
ID=15032292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1130350A Expired - Lifetime JP2596830B2 (en) | 1989-05-23 | 1989-05-23 | Hydrochloric acid recovery method of steel pickling equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2596830B2 (en) |
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|---|---|---|---|---|
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| CN110304777A (en) * | 2019-07-08 | 2019-10-08 | 苏州艾吉克膜科技有限公司 | A kind of waste acidity recovery processing unit and recovery and treatment method |
| CN110922327A (en) * | 2019-12-09 | 2020-03-27 | 邱洪 | Gallic acid acidizing device |
| CN113042481A (en) * | 2021-03-03 | 2021-06-29 | 广西柳州钢铁集团有限公司 | Method for on-line cleaning regular packing of absorption tower by hydrochloric acid regeneration system |
| KR20210084245A (en) * | 2019-12-27 | 2021-07-07 | 박찬의 | Pickling Treatment Apparatus |
| WO2024045614A1 (en) * | 2022-08-31 | 2024-03-07 | 中冶南方工程技术有限公司 | Recycling treatment system and method for acid pickling waste liquid |
-
1989
- 1989-05-23 JP JP1130350A patent/JP2596830B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015124418A (en) * | 2013-12-26 | 2015-07-06 | 住友金属鉱山株式会社 | Surface treatment method, and manufacturing method of metalized resin film using the same |
| CN110304777A (en) * | 2019-07-08 | 2019-10-08 | 苏州艾吉克膜科技有限公司 | A kind of waste acidity recovery processing unit and recovery and treatment method |
| CN110922327A (en) * | 2019-12-09 | 2020-03-27 | 邱洪 | Gallic acid acidizing device |
| KR20210084245A (en) * | 2019-12-27 | 2021-07-07 | 박찬의 | Pickling Treatment Apparatus |
| CN113042481A (en) * | 2021-03-03 | 2021-06-29 | 广西柳州钢铁集团有限公司 | Method for on-line cleaning regular packing of absorption tower by hydrochloric acid regeneration system |
| WO2024045614A1 (en) * | 2022-08-31 | 2024-03-07 | 中冶南方工程技术有限公司 | Recycling treatment system and method for acid pickling waste liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2596830B2 (en) | 1997-04-02 |
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