CN100434570C - Chromium stainless steel pickling apparatus and its cooling method - Google Patents
Chromium stainless steel pickling apparatus and its cooling method Download PDFInfo
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- CN100434570C CN100434570C CNB2006100129501A CN200610012950A CN100434570C CN 100434570 C CN100434570 C CN 100434570C CN B2006100129501 A CNB2006100129501 A CN B2006100129501A CN 200610012950 A CN200610012950 A CN 200610012950A CN 100434570 C CN100434570 C CN 100434570C
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Abstract
The present invention is chromium stainless steel pickling apparatus and its cooling method. The chromium stainless steel pickling apparatus includes a pickling tank, a mixed acid circulating tank and a heater connected through pipeline, and features that it is also provided with acid cooler with cooling water inlet, cooling water outlet, control valve on the cooling water outlet, upper part connected to the mixed acid circulating tank, and lower part connected to cooling acid pump connected also to the mixed acid circulating tank. The cooling method is that after the acid feeding pipe has temperature over 40 deg.c, the control valve in the steam inlet of the heater is closed and the acid solution is led with the pump to the cooler for being cooled to below 40 deg.c. The present invention has raised stainless steel pickling quality, lowered nitric acid, hydrofluoric acid and water consumption and reduced pickling cost.
Description
Technical field
The present invention relates to a kind of Chromium Stainless Steel pickling method of cooling.
Background technology
When production SUS400 series is the Chromium Stainless Steel finished product acid-washing, must the strict temperature of controlling pickle solution.If the temperature of pickle solution surpasses 40 ℃ in acid cleaning process, yellow flower seal can appear at surface of steel plate, be called engraved by acid.Existing acid-washing stainless steel device comprises pickling tank, nitration mixture circulation tank, interchanger, the both sides of pickling tank all are installed with rubber roll, the acid mouth that moves back of pickling tank connects logical with moving back sour valve with the top of nitration mixture circulation tank, the acid inlet of pickling tank is used sour valve and is connected logical with the top of well heater, the top of nitration mixture circulation tank connects logical with the top of well heater with recycle valve, well heater has steam inlet and vapour outlet, is connecting control valve at steam inlet, during use, this control valve connects logical with vapour source.The bottom of well heater connects logical with main sour pump outlet, the import of main sour pump connects logical with suction valve with the acid mouth that goes out of nitration mixture circulation tank.A pickle solution having heaters does not have refrigerating unit.In case the heat that acid solution and steel band (mainly being the SUS400 series stainless steel) reaction produces is too much, the temperature of acid solution will raise, often above 40 ℃, and can't guarantee steel band pickled surface quality, yellow engraved by acid can occur on the stainless steel plate surface and reach 1%, thereby have a strong impact on stainless quality product, and acid medium consumption height, pickling stainless steel plate per ton consumes nitric acid and reaches 16kg/ ton steel, and hydrofluoric acid is 7kg/ ton steel, spent acid quantity discharged height.
Summary of the invention
In order to overcome the existing ropy deficiency of Chromium Stainless Steel pickling method of cooling stainless steel surface after pickling, the invention provides the measured Chromium Stainless Steel pickling of stainless steel surface matter method of cooling after a kind of pickling.The device that this Chromium Stainless Steel pickling method of cooling adopts comprises pickling tank, nitration mixture circulation tank, well heater, the both sides of pickling tank all are installed with rubber roll, the acid mouth that moves back of pickling tank connects logical with moving back sour valve with the top of nitration mixture circulation tank, the acid inlet of pickling tank is used sour valve and is connected logical with the top of well heater, the top of nitration mixture circulation tank connects logical with the top of well heater with recycle valve, well heater has steam inlet and vapour outlet, connecting control valve at steam inlet, during use, this control valve connects logical with vapour source.The bottom of well heater connects logical with a main acid mouthful pump outlet, the import of main sour pump connects logical with suction valve with the acid mouth that goes out of nitration mixture circulation tank, it is characterized in that: acid cooler also is being set, water cooler has cooling water outlet and entrance of cooling water, cooling water outlet is installed with another control valve, the top of water cooler connects logical with the top of nitration mixture circulation tank, the bottom of water cooler connects logical with the sour pump outlet of cooling, and the import of cooling off sour pump connects logical with the side of nitration mixture circulation tank with suction valve.
This Chromium Stainless Steel pickling method of cooling is when the temperature of last acid tube reaches more than 40 ℃, close the control valve of the steam inlet of well heater, well heater quits work, from the side of nitration mixture circulation tank acid solution being drawn the acid solution input water cooler of drawing with the sour pump handle of cooling is cooled to below 40 ℃, input nitration mixture circulation tank, Artificial Control is regulated the discharge of water cooler, and the temperature that makes the mixed acid liquid in the nitration mixture circulation tank is between 35 ℃ to 40 ℃.
But the control valve Artificial Control of the steam inlet of well heater, the Pt100 type control device that also available German kelon company produces cuts out the control valve of the steam inlet of well heater automatically, and well heater quits work.
This Chromium Stainless Steel pickling method of cooling, the mixed acid liquid temperature-stable is controlled between 35 ℃ to 40 ℃, obviously improved stainless surface quality, the engraved by acid of the stainless steel surface after the pickling drops to below 0.4%, nitric acid, hydrofluoric acid and service water have reduced by 20%, have reduced pickling starting material and pickling cost, and the acid consumption is reduced to nitric acid 12kg/ ton steel, hydrofluoric acid is 6kg/ ton steel, and the quantity discharged of spent acid and acid-bearing wastewater all reduces 20% simultaneously.
Description of drawings
Fig. 1 is the structure iron of the pickling refrigerating unit embodiment of this Chromium Stainless Steel pickling method of cooling employing.Among the above-mentioned figure:
1, rubber roll 2, steel band 3, pickling tank 4, move back acid mouth 5, acid inlet 6, last acid tube 7, rubber roll 8, acid inlet 9, recycle valve 10, circulation tube 11, go up sour valve 12, last acid tube 13, thermometer 14, go out acid mouth 15, suction valve 16, closed tube 17, well heater 18, steam inlet 19 control valves 20, vapour outlet 21, outlet 22, main sour pump 23, import 24, suction valve 25, closed tube 26, import 27, cool off sour pump 28, outlet 29, nitration mixture circulation tank 30, closed tube 31, entrance of cooling water 32, water cooler 33, cooling water outlet 34, control valve 35, closed tube 36, jar inlet 37, acid inlet 38, move back sour valve 39, move back acid tube
Embodiment
Below in conjunction with the embodiment of embodiment and this Chromium Stainless Steel of description of drawings pickling method of cooling thereof, but the embodiment of Chromium Stainless Steel pickling method of cooling of the present invention is not limited to following embodiment.
At first introduce the pickling refrigerating unit that present embodiment adopts.The Chromium Stainless Steel pickling refrigerating unit that Fig. 1 describes comprises pickling tank 3, nitration mixture circulation tank 29, well heater 17, the left side of pickling tank 3 and right side are installed with rubber roll 1 and rubber roll 7 respectively, acid mouthful 4 usefulness of moving back of pickling tank 3 are moved back sour valve 38 and are moved back acid tube 39 and the acid of nitration mixture circulation tank 29 and enter the mouth and 37 connect and lead to, the acid inlet 5 of pickling tank 3 is used acid tube 6, last acid tube 12 reaches upward, and sour valve 11 connects logical with the top of well heater 17, the top that thermometer 13 nitration mixture circulation tanks 29 are installed at last acid tube 12 connects logical with the top of well heater 17 with circulation tube 10 and recycle valve 9, well heater 17 has steam inlet 18 and vapour outlet 20, is connecting control valve 19 at steam inlet 18.The bottom of well heater 17 connects logical with pipeline with the outlet 21 of main sour pump 22, import 23 usefulness the closed tubes 16 of main sour pump 22 and suction valve 15 and nitration mixture circulation tank 29 be lateral to be gone out sour mouth 14 and connects and lead to, it is characterized in that: acid cooler 32 also is being set, there are cooling water outlet 33 and entrance of cooling water 31 in the side of water cooler 32, cooling water outlet 33 is installed with control valve 34, the top of water cooler 32 connects logical with the inlet 36 on nitration mixture circulation tank 29 tops with closed tube 35, the bottom of water cooler 32 connects logical with closed tube 30 with the outlet 28 of the sour pump 27 of cooling, cool off the import 26 usefulness closed tubes 25 of sour pump 27 and suction valve 24 connects with the import 23 of main sour pump 22 logical, thereby connect and lead to by the acid mouth 14 that goes out of closed tube 16 and suction valve 15 and nitration mixture circulation tank 29.
The working process and the acid-washing stainless steel temperature-controlled process of this chromium stainless steel pickling apparatus are described with the foregoing description.Under the normal pickling situation, pass through main sour pump 22 from the pickle solution of nitration mixture circulation tank 29 process suction valves 15, be heated to the technological temperature requirement through well heater 17, be generally between 40 ℃ to 60 ℃, enter pickling tank 3 interior sending out by last sour valve 11 and answer, thereby pickling is carried out on steel band 2 surfaces with steel band 2 generations.In order to detect the temperature of pickle solution, Pt100 type thermometer 13 is installed in last acid tube 12, when pickle solution temperature in the last acid tube 12 surpassed design temperature, closed control valve 19, steam no longer entered well heater 17 inside, and well heater 17 quits work.At this moment, the part acid solution enters the sour pump 27 of cooling by suction valve 24, cools off by 32 pairs of acid solutions of water cooler, cools off acid solution by the amount of control valve 34 controlled chilling water, makes acid liquor temperature reach technological temperature, generally is controlled between 35 ℃ to 40 ℃.
The water cooler 32 of present embodiment adopts the piece cellular type graphite teflon resin water cooler of standards, employing be the water cooler that river, Taiyuan emerging graphite heat exchanger equipment company limited produces, model is TXH-F4.
It is the impeller recycle pump of liner that the sour pump 27 of main sour pump 22 and cooling adopts PVDF, and used adapting pipe steel lining tetrafluoro pipe, all valves adopt lining F4 butterfly valve.
When pickling SUS400 series stainless steel, if the pickle solution temperature is above 40 ℃, steam off inlet by-pass valve control 19, make steam no longer enter well heater 17 inside, entrance of cooling water valve 34 is opened in operation then, according to the automatic regulating pondage size of temperature conditions, thereby control pickle solution temperature remains between 35 ℃ to 40 ℃.Also can operate steam off inlet by-pass valve control 19 by computer remote.
Claims (1)
1, a kind of Chromium Stainless Steel pickling method of cooling, it is to adopt following pickling refrigerating unit to carry out the pickling cooling, this pickler comprises pickling tank, the nitration mixture circulation tank, well heater, the both sides of pickling tank all are installed with rubber roll, the acid mouth that moves back of pickling tank connects logical with moving back sour valve with the top of nitration mixture circulation tank, the acid inlet of pickling tank is used sour valve and is connected logical with the top of well heater, the top of nitration mixture circulation tank connects logical with the top of well heater with recycle valve, well heater has steam inlet and vapour outlet, connecting control valve at steam inlet, the bottom of well heater connects logical with main sour pump outlet, the import of main sour pump connects logical with suction valve with the acid mouth that goes out of nitration mixture circulation tank, it is characterized in that: acid cooler also is being set, water cooler has cooling water outlet and entrance of cooling water, cooling water outlet is installed with another control valve, the top of water cooler connects logical with the top of nitration mixture circulation tank, the bottom of water cooler connects logical with the sour pump outlet of cooling, the import of cooling off sour pump connects logical with the side of nitration mixture circulation tank with suction valve; The pickling cooling step is when the temperature of last acid tube reaches more than 40 ℃, close the control valve of the steam inlet of well heater, well heater quits work, from the side of nitration mixture circulation tank acid solution being drawn the acid solution input water cooler of drawing with the sour pump handle of cooling is cooled to below 40 ℃, input nitration mixture circulation tank, regulate the discharge of water cooler, the temperature that makes the mixed acid liquid in the nitration mixture circulation tank is between 35 ℃ to 40 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100129501A CN100434570C (en) | 2006-07-13 | 2006-07-13 | Chromium stainless steel pickling apparatus and its cooling method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100129501A CN100434570C (en) | 2006-07-13 | 2006-07-13 | Chromium stainless steel pickling apparatus and its cooling method |
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| Publication Number | Publication Date |
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| CN1888140A CN1888140A (en) | 2007-01-03 |
| CN100434570C true CN100434570C (en) | 2008-11-19 |
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| CNB2006100129501A Active CN100434570C (en) | 2006-07-13 | 2006-07-13 | Chromium stainless steel pickling apparatus and its cooling method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877081A (en) * | 2012-09-26 | 2013-01-16 | 中冶南方工程技术有限公司 | Pre-pickling acid liquor circulation system and method for hot-rolled stainless steel strip steel |
| CN102877080A (en) * | 2012-09-26 | 2013-01-16 | 中冶南方工程技术有限公司 | Hot-rolled stainless steel strip steel mixed-acid pickling circulation system and method |
| CN104099627B (en) * | 2014-07-29 | 2016-06-08 | 安徽省宁国市东波紧固件有限公司 | A kind of descaling bath with acid recovery function |
| CN106521524A (en) * | 2016-11-28 | 2017-03-22 | 太原钢铁(集团)有限公司 | Method for enhancing acid pickling efficiency of stainless steel tubes |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2012162A1 (en) * | 1970-03-14 | 1971-09-23 | Schoeller & Co | Surface cleaning process whereby impuritiesa |
| CN2151986Y (en) * | 1993-03-26 | 1994-01-05 | 员云星 | Closed acid cleaning device |
| CN1088631A (en) * | 1992-12-03 | 1994-06-29 | Sms舒路曼-斯玛公司 | The method of pickling installation and its operation |
| CN1224776A (en) * | 1997-11-28 | 1999-08-04 | 安德里茨-专利管理有限公司 | Process and apparatus for improved guiding of strip |
| CN1256720A (en) * | 1998-03-11 | 2000-06-14 | 三菱重工业株式会社 | Pickling device |
| CN2918448Y (en) * | 2006-07-13 | 2007-07-04 | 太原钢铁(集团)有限公司 | Chromium stainless steel acid dip pickle |
-
2006
- 2006-07-13 CN CNB2006100129501A patent/CN100434570C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2012162A1 (en) * | 1970-03-14 | 1971-09-23 | Schoeller & Co | Surface cleaning process whereby impuritiesa |
| CN1088631A (en) * | 1992-12-03 | 1994-06-29 | Sms舒路曼-斯玛公司 | The method of pickling installation and its operation |
| CN2151986Y (en) * | 1993-03-26 | 1994-01-05 | 员云星 | Closed acid cleaning device |
| CN1224776A (en) * | 1997-11-28 | 1999-08-04 | 安德里茨-专利管理有限公司 | Process and apparatus for improved guiding of strip |
| CN1256720A (en) * | 1998-03-11 | 2000-06-14 | 三菱重工业株式会社 | Pickling device |
| CN2918448Y (en) * | 2006-07-13 | 2007-07-04 | 太原钢铁(集团)有限公司 | Chromium stainless steel acid dip pickle |
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| CN1888140A (en) | 2007-01-03 |
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| ASS | Succession or assignment of patent right |
Owner name: SHANXI TAIGANG STAINLESS STEEL CO., LTD. Free format text: FORMER OWNER: TAIYUAN IRON AND STEEL (GROUP) CO LTD Effective date: 20070629 |
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Effective date of registration: 20070629 Address after: 030003 No. 2 lawn street, Taiyuan, Shanxi Applicant after: Shanxi Taigang Stainless Steel Co., Ltd. Address before: 030003 No. 2, sharp lawn, Taiyuan City, Shanxi Province Applicant before: Taiyuan Iron & Steel (Group) Co., Ltd. |
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