CN108396326A - A kind of reclamation set and reuse method of acid-washing waste acid - Google Patents
A kind of reclamation set and reuse method of acid-washing waste acid Download PDFInfo
- Publication number
- CN108396326A CN108396326A CN201810185079.8A CN201810185079A CN108396326A CN 108396326 A CN108396326 A CN 108396326A CN 201810185079 A CN201810185079 A CN 201810185079A CN 108396326 A CN108396326 A CN 108396326A
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- CN
- China
- Prior art keywords
- acid
- tank
- freezing
- crystallizing kettle
- sour
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Classifications
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- 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
-
- 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
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/081—Iron or steel solutions containing H2SO4
Abstract
The invention discloses a kind of reclamation set of acid-washing waste acid and reuse methods, reclamation set includes spent acid sedimentation basin, first sour tank, freezing and crystallizing kettle, filtering tank and the second sour tank, spent acid sedimentation basin is for collecting waste acid liquor caused by sulfuric acid washing steel, first sour tank is for containing the concentrated sulfuric acid, the outlet end of spent acid sedimentation basin and the first sour tank is connected with the arrival end of freezing and crystallizing kettle respectively, freezing and crystallizing kettle is connect with a cooling mechanism, cooling mechanism is for realizing the refrigeration to freezing and crystallizing kettle, the outlet end of freezing and crystallizing kettle is connected with the arrival end of filtering tank, one vacuum pump of outlet end of filtering tank is connected with the arrival end of the second sour tank, second sour tank is used to provide spent pickling acid to Pickling-shop.The deficiency discharged after can only being handled the present invention overcomes traditional spent acid processing method; spent acid is fully considered treated availability requirement; recycling for acid-washing waste acid is realized, production cost and waste discharge can be greatly reduced, is conducive to resource-effective and environmental protection.
Description
Technical field
The invention belongs to waste acid recycling technical fields, and in particular to a kind of reclamation set of acid-washing waste acid and reuse side
Method relates generally to the reuse of acid-washing waste acid caused by sulfuric acid washing steel.
Background technology
Currently, for steel products such as steel pipes, sulfuric acid treatment steel pipe is often used in the pickling process in production.Sulfuric acid
It will produce a large amount of waste in acid cleaning process, and to avoid causing environmental pollution, the sulfuric acid after flushing is unable to direct emission, lead to
It is handled frequently with traditional method：After the spent acid of collection is removed larger impurity and particulate matter and floating material through precipitation,
It is introduced into acid-base neutralization kettle and carries out acid-base neutralization reaction（Reaction equation is：2NaOH+H2SO4→Na2SO4+2H2O）, using filtering
Pond layered filtration discharges after up to standard.This traditional treatment method not only results in the waste of a large amount of manpower and materials, and Yi Yincao
Make the negligence of personnel and causes environmental pollution.
Invention content
The technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide a kind of suitable for sulfuric acid washing
The reclamation set and reuse method of acid-washing waste acid caused by steel, which overcome traditional spent acid processing methods can only handle heel row
The deficiency put has fully considered spent acid treated availability requirement, realized recycling for acid-washing waste acid, can be greatly reduced
Production cost and waste discharge are conducive to resource-effective and environmental protection.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of reclamation set of acid-washing waste acid, including
Spent acid sedimentation basin, the first sour tank, freezing and crystallizing kettle, filtering tank and the second sour tank, the spent acid sedimentation basin is for collecting sulfuric acid
Waste acid liquor caused by pickling steel, the described first sour tank is for containing the concentrated sulfuric acid, the spent acid sedimentation basin and described
The outlet end of the first sour tank be connected respectively with the arrival end of the freezing and crystallizing kettle, the freezing and crystallizing kettle and a cooling
Mechanism connects, and the cooling mechanism goes out for realizing the refrigeration to the freezing and crystallizing kettle, the freezing and crystallizing kettle
Mouth end is connected with the arrival end of the filtering tank, one vacuum pump of outlet end of the filtering tank and the described second sour tank
Arrival end be connected, the described second sour tank is used to provide spent pickling acid to Pickling-shop.
Preferably, the cooling mechanism includes refrigerator and cooling water tank, is equipped with and changes in the freezing and crystallizing kettle
The outlet end of heat pipeline, the refrigerator is connected through the cooling water tank with the arrival end of the heat exchange pipeline, described
The outlet end of heat exchange pipeline be connected with the arrival end of the refrigerator through the cooling water tank.
Preferably, the filtering tank includes tank body and filter bag, and the filter bag is removably mounted on described
The inner cavity of tank body.The setting of filter bag is easy to implement the packaging to ferrous sulfate hydrate, improves waste acidity recovery treatment effeciency.
Preferably, the outlet end of the second sour tank is connected with the arrival end of a still preheater, the described second sour tank warp
The still preheater provides spent pickling acid to Pickling-shop.The setting of still preheater, the cycle for being conducive to optimize spent acid is for technique.
Using the reuse method of above-mentioned reclamation set reuse acid-washing waste acid, include the following steps：
（1）Waste acid liquor caused by sulfuric acid washing steel is injected into freezing and crystallizing kettle from spent acid sedimentation basin, then through the first acid
Tank injects the concentrated sulfuric acid into freezing and crystallizing kettle, and the weight ratio of the waste acid liquor and the concentrated sulfuric acid of injection is（2~
2.2）:（0.4~0.5）, react 6~8 hours, obtain mixed liquor；
（2）After reaction, it opens cooling mechanism to freeze to freezing and crystallizing kettle, the temperature in freezing and crystallizing kettle is made to reach -1~3
DEG C, mixed liquor in freezing and crystallizing kettle is cooled down, ferrous sulfate is constantly precipitated from mixed liquor in cooling procedure, cooling procedure
Middle timing detects mixed liquor ferrous ions concentration, when mixed liquor ferrous ions concentration is less than 60 grams per liter, by the sulphur of precipitation
Sour ferrous iron, which is concomitantly introduced into together with mixed liquor in filtering tank, to be filtered, and ferrous sulfate hydrate and sulfuric acid solution are obtained；
（3）The sulfuric acid solution in filtering tank is pumped into the second sour tank by vacuum pump, waits for Pickling-shop reuse, and will be in filtering tank
Remaining ferrous sulfate hydrate is packaged pack, that is, completes the reuse to acid-washing waste acid.
Compared with prior art, the invention has the advantages that：The reclamation set of acid-washing waste acid of the present invention is simple in structure, at
This put into it is low, it can be achieved that the spent acid as workshop byproduct comprehensive reutilization.The present invention uses the side of physical separation first
Method precipitation isolates the sundries being mingled in spent acid, then by spent acid and concentrated sulfuric acid hybrid reaction, through cooling, the water that filters and will obtain
It closes ferrous sulfate to detach with sulfuric acid, you can realize the processing to spent acid, sulfuric acid can for Pickling-shop pickling, ferrous sulfate hydrate
The raw material for being provided as the various related industries products such as molysite, pigment uses.The present invention overcomes traditional spent acid processing methods can only
The deficiency discharged after processing has fully considered spent acid treated availability requirement, realized recycling for acid-washing waste acid, can
Production cost and waste discharge is greatly reduced, is conducive to resource-effective and environmental protection.
Description of the drawings
Fig. 1 is the structure connection diagram of the reclamation set of acid-washing waste acid in embodiment.
Specific implementation mode
Below in conjunction with attached drawing embodiment, present invention is further described in detail.
Embodiment 1：A kind of reclamation set of acid-washing waste acid, as shown in Figure 1, including the sour tank 2 of spent acid sedimentation basin 1, first, cold
Freeze crystallization kettle 3, filtering tank 4 and the second sour tank 5, spent acid sedimentation basin 1 to be used to collect waste acid liquor caused by sulfuric acid washing steel,
First sour tank 2 is for containing the concentrated sulfuric acid, the outlet end of spent acid sedimentation basin 1 and the first sour tank 2 entrance with freezing and crystallizing kettle 3 respectively
End is connected, and freezing and crystallizing kettle 3 is connect with a cooling mechanism, and cooling mechanism is for realizing the refrigeration to freezing and crystallizing kettle 3, freezing knot
The outlet end of brilliant kettle 3 is connected with the arrival end of filtering tank 4, and one vacuum pump 6 of outlet end of filtering tank 4 enters with the second sour tank 5
Mouthful end is connected, and the outlet end of the second sour tank 5 is connected with the arrival end of a still preheater 7, and the second acid 5 preheated kettle 7 of tank is to pickling vehicle
Between spent pickling acid is provided.Arrow show liquid flow path direction in Fig. 1.
In embodiment 1, cooling mechanism includes refrigerator 8 and cooling water tank 9, and heat exchange pipeline is equipped in freezing and crystallizing kettle 3
（It is not shown in figure）, the outlet end of refrigerator 8 is connected through cooling water tank 9 with the arrival end of heat exchange pipeline, the outlet of heat exchange pipeline
End is connected through cooling water tank 9 with the arrival end of refrigerator 8.
In embodiment 1, filtering tank 4 may include tank body and filter bag（It is not shown in figure）, filter bag passes through dismountable
Mode is mounted on the inner cavity of tank body.
Embodiment 2：Using the reuse method of the reclamation set reuse acid-washing waste acid of embodiment 1, include the following steps：
（1）Waste acid liquor caused by 2 tons of sulfuric acid washing steel is injected into freezing and crystallizing kettle 3 from spent acid sedimentation basin 1, then through
One sour tank 2 injects 0.5 ton of concentrated sulfuric acid into freezing and crystallizing kettle 3, reacts 8 hours, obtains mixed liquor；
（2）After reaction, cooling mechanism is opened to freeze to freezing and crystallizing kettle 3, make the temperature in freezing and crystallizing kettle 3 reach -1~
3 DEG C, mixed liquor in freezing and crystallizing kettle 3 is cooled down, ferrous sulfate is constantly precipitated from mixed liquor in cooling procedure, cooled
Mixed liquor ferrous ions concentration is periodically detected in journey, when mixed liquor ferrous ions concentration is less than 60 grams per liter, by precipitation
Ferrous sulfate is concomitantly introduced into filtering tank 4 together with mixed liquor and filters, and obtains ferrous sulfate hydrate and sulfuric acid solution；
（3）The sulfuric acid solution in filtering tank 4 is pumped into the second sour tank 5 by vacuum pump 6, waits for Pickling-shop reuse, and will filtering
Remaining ferrous sulfate hydrate is packaged pack in tank 4, and ferrous sulfate hydrate can be provided as the various related industries productions such as molysite, pigment
The raw material of product uses.
Claims (5)
1. a kind of reclamation set of acid-washing waste acid, it is characterised in that including spent acid sedimentation basin, the first sour tank, freezing and crystallizing kettle, mistake
Filter tank and the second sour tank, the spent acid sedimentation basin is for collecting waste acid liquor caused by sulfuric acid washing steel, and described the
One sour tank for containing the concentrated sulfuric acid, the outlet end of the spent acid sedimentation basin and the described first sour tank respectively with the freezing
The arrival end of crystallization kettle is connected, and the freezing and crystallizing kettle is connect with a cooling mechanism, and the cooling mechanism is for realizing right
The outlet end of the refrigeration of the freezing and crystallizing kettle, the freezing and crystallizing kettle is connected with the arrival end of the filtering tank, institute
One vacuum pump of outlet end for the filtering tank stated is connected with the arrival end of the described second sour tank, the described second sour tank for
Pickling-shop provides spent pickling acid.
2. a kind of reclamation set of acid-washing waste acid according to claim 1, it is characterised in that the cooling mechanism includes
Refrigerator and cooling water tank, are equipped with heat exchange pipeline in the freezing and crystallizing kettle, described in the outlet end warp of the refrigerator
Cooling water tank be connected with the arrival end of the heat exchange pipeline, the outlet end of the heat exchange pipeline is through the cooling water tank
It is connected with the arrival end of the refrigerator.
3. a kind of reclamation set of acid-washing waste acid according to claim 1, it is characterised in that the filtering tank includes tank
Body and filter bag, the filter bag are removably mounted on the inner cavity of the tank body.
4. a kind of reclamation set of acid-washing waste acid according to claim 1, it is characterised in that the sour tank of described second goes out
Mouth end is connected with the arrival end of a still preheater, and the described second sour tank provides pickling to Pickling-shop through the still preheater and uses
Acid.
5. utilizing the reuse method of the reclamation set reuse acid-washing waste acid described in any one of claim 1-4, it is characterised in that
Include the following steps：
（1）Waste acid liquor caused by sulfuric acid washing steel is injected into freezing and crystallizing kettle from spent acid sedimentation basin, then through the first acid
Tank injects the concentrated sulfuric acid into freezing and crystallizing kettle, and the weight ratio of the waste acid liquor and the concentrated sulfuric acid of injection is（2~
2.2）:（0.4~0.5）, react 6~8 hours, obtain mixed liquor；
（2）After reaction, it opens cooling mechanism to freeze to freezing and crystallizing kettle, the temperature in freezing and crystallizing kettle is made to reach -1~3
DEG C, mixed liquor in freezing and crystallizing kettle is cooled down, ferrous sulfate is constantly precipitated from mixed liquor in cooling procedure, cooling procedure
Middle timing detects mixed liquor ferrous ions concentration, when mixed liquor ferrous ions concentration is less than 60 grams per liter, by the sulphur of precipitation
Sour ferrous iron, which is concomitantly introduced into together with mixed liquor in filtering tank, to be filtered, and ferrous sulfate hydrate and sulfuric acid solution are obtained；
（3）The sulfuric acid solution in filtering tank is pumped into the second sour tank by vacuum pump, waits for Pickling-shop reuse, and will be in filtering tank
Remaining ferrous sulfate hydrate is packaged pack, that is, completes the reuse to acid-washing waste acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810185079.8A CN108396326A (en) | 2018-03-07 | 2018-03-07 | A kind of reclamation set and reuse method of acid-washing waste acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810185079.8A CN108396326A (en) | 2018-03-07 | 2018-03-07 | A kind of reclamation set and reuse method of acid-washing waste acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108396326A true CN108396326A (en) | 2018-08-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810185079.8A Pending CN108396326A (en) | 2018-03-07 | 2018-03-07 | A kind of reclamation set and reuse method of acid-washing waste acid |
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| CN (1) | CN108396326A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110846669A (en) * | 2019-11-26 | 2020-02-28 | 鹤山恒基钢丝制品有限公司 | Waste sulfuric acid refrigeration iron removal recycling system and process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1164579A (en) * | 1996-05-05 | 1997-11-12 | 大连市金州区环境监测站 | Process for treatment of sulfuric acid pickling waste liquor for pickling steel |
| CN101294286A (en) * | 2008-05-30 | 2008-10-29 | 陈跃星 | Processing and recycling method and equipment for acid pickle of acid washing rolled steel |
| CN101691663A (en) * | 2009-09-11 | 2010-04-07 | 同济大学 | Method and device for on-line regeneration of sulfuric acid pickling waste liquid |
| CN105671572A (en) * | 2016-03-03 | 2016-06-15 | 浙江大学 | Steel pickling solution recycling device and process based on Fenton oxidization |
| CN205838787U (en) * | 2015-05-13 | 2016-12-28 | 宁波绿矾环保科技有限公司 | A kind of processing system of pickling waste waters |
-
2018
- 2018-03-07 CN CN201810185079.8A patent/CN108396326A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1164579A (en) * | 1996-05-05 | 1997-11-12 | 大连市金州区环境监测站 | Process for treatment of sulfuric acid pickling waste liquor for pickling steel |
| CN101294286A (en) * | 2008-05-30 | 2008-10-29 | 陈跃星 | Processing and recycling method and equipment for acid pickle of acid washing rolled steel |
| CN101691663A (en) * | 2009-09-11 | 2010-04-07 | 同济大学 | Method and device for on-line regeneration of sulfuric acid pickling waste liquid |
| CN205838787U (en) * | 2015-05-13 | 2016-12-28 | 宁波绿矾环保科技有限公司 | A kind of processing system of pickling waste waters |
| CN105671572A (en) * | 2016-03-03 | 2016-06-15 | 浙江大学 | Steel pickling solution recycling device and process based on Fenton oxidization |
Non-Patent Citations (2)
| Title |
|---|
| 熊道陵等: "《电镀污泥中有价金属提取技术》", 31 October 2013, 北京：冶金工业出版社 * |
| 马建立等: "《绿色冶金与清洁生产》", 30 June 2007, 北京：冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110846669A (en) * | 2019-11-26 | 2020-02-28 | 鹤山恒基钢丝制品有限公司 | Waste sulfuric acid refrigeration iron removal recycling system and process |
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| PB01 | Publication | ||
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Application publication date: 20180814 |