CN102168934B - Repairing method for heat exchanger - Google Patents
Repairing method for heat exchanger Download PDFInfo
- Publication number
- CN102168934B CN102168934B CN201110091075A CN201110091075A CN102168934B CN 102168934 B CN102168934 B CN 102168934B CN 201110091075 A CN201110091075 A CN 201110091075A CN 201110091075 A CN201110091075 A CN 201110091075A CN 102168934 B CN102168934 B CN 102168934B
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- seamless pipe
- manhole
- tube
- corroded
- 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.)
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000007797 corrosion Effects 0.000 claims abstract description 14
- 238000005260 corrosion Methods 0.000 claims abstract description 14
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 235000019353 potassium silicate Nutrition 0.000 claims description 10
- 241001234523 Velamen Species 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000002253 acid Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 239000004115 Sodium Silicate Substances 0.000 abstract 2
- -1 polytetrafluoroethylene Polymers 0.000 abstract 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract 2
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract 2
- 229910052911 sodium silicate Inorganic materials 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000007664 blowing Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009854 hydrometallurgy Methods 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a repairing method for a heat exchanger. A section of seamless tube with an outer diameter less than the inner diameter of a heat exchange tube is inserted into a corroded heat exchange tube; moreover, sodium silicate and a polytetrafluoroethylene rope are embedded between the upper edge and the lower edge of each corroded heat exchange tube and the newly inserted seamless tube to block and seal a gap; and the heat exchanger can be continuously used after the sodium silicate and the polytetrafluoroethylene rope are solidified. According to the repairing method, the cost can be saved, and the operation is simple and convenient; and the heat exchanger in case of serious partial corrosion or corrosion on any part can be repaired for use by the repairing method, and does not need to be replaced. The repairing method for the heat exchanger is used in a first-stage acid manufacture system, and has very good effect; the heat exchanger after being processed is used for more than 8 years, and smoky situation never occurs.
Description
Technical field
The present invention relates to the recovery technique field of heat exchanger in a kind of smelting industry, relate to a kind of restorative procedure of heat exchanger specifically.
Background technology
In Zinc Hydrometallurgy Technology; Heat exchanger in the acid making system can be because service life be long or be easy in heat exchanger, produce condensation acid corrosion heat exchanger tube because of the bad index of control; Cause the shell side smoke blowing of the heat exchanger tube and the outer cover of heat exchanger of heat exchanger; Influence the conversion ratio of flue gas, tail gas exceeds standard when seriously corroded, must stop to handle.The lower end of heat exchanger heat-exchanging tube is corroded easily generally speaking; Can handle through the way that in the shell side of outer cover of heat exchanger, pours into acid resistant adhesive mortar when not serious,, also reduce heat exchange area simultaneously though this method can stop smoke blowing; Influence the heat exchange efficiency of heat exchanger; And this method just can't implement when the heat exchanger tube seriously corroded of heat exchanger or when heat exchanger tube middle part and top seriously corroded, can only change whole heat exchanger, causes very big loss to the user.How to provide a kind of practice thrift cost, easy and simple to handle, under the situation of heat exchanger severe corrosion or the corrosion of any position, all can repair use, and more the restorative procedure of switching heat-exchanger becomes demand urgent in the zinc hydrometallurgy industry.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of restorative procedure of practicing thrift cost, heat exchanger easy and simple to handle is provided.
The objective of the invention is to realize through following scheme: a kind of restorative procedure of heat exchanger, said restorative procedure comprises the steps:
A. offer first manhole and second manhole respectively at the lower house of heat exchanger and the sidewall of upper shell;
B. open first manhole and second manhole of heat exchanger upper and lower casing, cut the position of changing the heat pipe seriously corroded, and, cross the corrosion section when being ready to intert and inject the seamless pipe more than 50 centimetres in the heat exchanger tube by housing observation;
C. the insertion end with seamless pipe cuts out the oblique angle, and the external diameter of said seamless pipe is less than the internal diameter of said heat exchanger tube;
D. in the heat exchanger tube of the heat exchanger that is corroded, insert said seamless pipe, the personnel that get into outwards intert from the lining one by one by lower house or upper shell, and spot welding is fixed, and near the seamless pipe of first manhole and second manhole is installed at last;
E. twine the tetrafluoro rope at the two ends of said seamless pipe, after the two ends of seamless pipe are coated with last layer waterglass, seamless pipe is interted in the heat exchanger tube that into is corroded again;
F. said seamless pipe lower end is reserved 5 centimetres outside heat exchanger tube sheet, the lower extreme point of seamless pipe is welded on the tube sheet;
Embedding waterglass and tetrafluoro rope are blocked the slit between two edges up and down of the heat exchanger tube of g. every velamen corrosion and the new said seamless pipe that inserts, and promptly salable after waiting to solidify, heat exchanger continues to use.
The wall thickness of said seamless pipe is 4 millimeters.
After finishing, reparation is used to the binder-treatment second time of guaranteeing that gap sealing is tight with waterglass and tetrafluoro rope exchange heat pipe again.
The invention has the advantages that: the present invention inserts the seamless pipe of one section external diameter less than the heat exchanger tube internal diameter in the heat exchanger tube of the heat exchanger that is corroded; And the heat exchanger tube of every root-rot erosion up and down between two edges and the new said seamless pipe that inserts the slit embed waterglass and tetrafluoro and restrict and block the slit; Seal, wait to solidify the back heat exchanger and can continue to use.The present invention is a kind of cost, restorative procedure easy and simple to handle practiced thrift, and the present invention can repair use, more switching heat-exchanger under the situation of heat exchanger severe corrosion or the corrosion of any position.The restorative procedure of heat exchanger of the present invention used in the first phase acid making system, and effect is very good, and heat exchanger has after treatment been used the time more than 8 years, did not also occur the smoke blowing situation till now.
Description of drawings
Fig. 1 is the heat exchanger cross-sectional view of the restorative procedure of use heat exchanger of the present invention;
Fig. 2 is the A portion partial enlarged drawing of the heat exchanger of the restorative procedure of use heat exchanger of the present invention;
Wherein: 1 heat exchanger, 2 upper shells, 3 lower houses, 4 heat exchanger tubes, 5 first manholes, 6 second manholes, 7 seamless pipes, 8 tetrafluoros rope, 9 tube sheets.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is further specified.
A kind of restorative procedure of heat exchanger, said restorative procedure comprise the steps: that a. offers first manhole 5 and second manhole 6 respectively at the lower house 3 of heat exchanger 1 and the sidewall of upper shell 2; B. open first manhole 5 and second manhole 6 of heat exchanger 1 upper and lower casing 3, cut the position of changing heat pipe 4 seriously corrodeds, and, cross the corrosion section when being ready to intert and inject heat exchanger tube 4 interior seamless pipes 7 more than 50 centimetres by housing observation; C. the insertion end with seamless pipe 7 cuts out the oblique angle, and the external diameter of said seamless pipe 7 is less than the internal diameter of said heat exchanger tube 4; D. in the heat exchanger tube 4 of the heat exchanger that is corroded 1, insert said seamless pipe 7, outwards interted one by one from the lining by lower house 3 or upper shell 2 entering personnel, spot welding is fixed, and near first manhole 5 seamless pipe 7 with second manhole 6 is installed at last; E. twine tetrafluoro rope 8 at the two ends of said seamless pipe 7, after the two ends of seamless pipe 7 are coated with last layer waterglass, seamless pipe 7 is interted in the heat exchanger tube 4 that into is corroded again; F. said seamless pipe 7 lower ends are reserved 5 centimetres outside heat exchanger 1 tube sheet 9, the lower extreme point of seamless pipe 7 is welded on the tube sheet 9; Embedding waterglass and tetrafluoro rope 8 are blocked the slit between two edges up and down of the heat exchanger tube 4 of g. every velamen corrosion and the new said seamless pipe 7 that inserts, and promptly salable after waiting to solidify, heat exchanger 1 continues to use.The wall thickness of said seamless pipe 7 is 4 millimeters.After finishing, reparation is used to the binder-treatment second time of guaranteeing that gap sealing is tight with waterglass and tetrafluoro rope 8 exchange heat pipes 4 again.
Should be noted that at last; Above content is only in order to explain technical scheme of the present invention; But not to the restriction of protection domain of the present invention; The simple modification that those of ordinary skill in the art carries out technical scheme of the present invention perhaps is equal to replacement, does not all break away from the essence and the scope of technical scheme of the present invention.
Claims (3)
1. the restorative procedure of a heat exchanger, it is characterized in that: said restorative procedure comprises the steps:
A. offer first manhole (5) and second manhole (6) respectively at the upper shell (2) of heat exchanger (1) and the sidewall of lower house (3);
B. open first manhole (5) and second manhole (6) of heat exchanger upper and lower casing, cut the position of changing heat pipe (4) seriously corroded, and, cross the corrosion section when being ready to intert and inject the interior seamless pipe (7) more than 50 centimetres of heat exchanger tube (4) by housing observation;
C. the insertion end with seamless pipe (7) cuts out the oblique angle, and the external diameter of said seamless pipe (7) is less than the internal diameter of said heat exchanger tube (4);
D. in the heat exchanger tube (4) of the heat exchanger that is corroded (1), insert said seamless pipe (7), outwards interted one by one from the lining by lower house (3) or upper shell (2) entering personnel, spot welding is fixed, and near the seamless pipe (7) of first manhole (5) and second manhole (6) is installed at last;
E. twine tetrafluoro rope (8) at the two ends of said seamless pipe (7), after the two ends of seamless pipe (7) are coated with last layer waterglass, seamless pipe (7) is interted in the heat exchanger tube (4) that into is corroded again;
F. said seamless pipe (7) lower end is reserved 5 centimetres outside heat exchanger (1) tube sheet (9), the lower extreme point of seamless pipe (7) is welded on the tube sheet (9);
Embedding waterglass and tetrafluoro rope (8) are blocked the slit between two edges up and down of the middle corrosion location of heat exchanger tube (4) of g. every velamen corrosion and the new said seamless pipe (7) that inserts, and be promptly salable after waiting to solidify, and heat exchanger (1) is all right to be continued use.
2. according to the restorative procedure of the described heat exchanger of claim 1, it is characterized in that: the wall thickness of said seamless pipe (7) is 4 millimeters.
3. according to the restorative procedure of the described heat exchanger of claim 1, it is characterized in that: repair after finishing again with waterglass and tetrafluoro restrict (8) exchange heat pipes (4) and be used to the binder-treatment second time of guaranteeing that gap sealing is tight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110091075A CN102168934B (en) | 2011-04-03 | 2011-04-03 | Repairing method for heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110091075A CN102168934B (en) | 2011-04-03 | 2011-04-03 | Repairing method for heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102168934A CN102168934A (en) | 2011-08-31 |
| CN102168934B true CN102168934B (en) | 2012-09-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110091075A Active CN102168934B (en) | 2011-04-03 | 2011-04-03 | Repairing method for heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102168934B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175655A (en) * | 2012-12-22 | 2013-06-26 | 山东博丰利众化工有限公司 | Methods for diagnosing and eliminating temperature anomaly of pyritic acid manufacturing converter |
| CN112570979B (en) * | 2020-12-28 | 2023-05-05 | 天脊煤化工集团股份有限公司 | Repairing method of fixed tube-plate type heat exchanger |
| CN113531144B (en) * | 2021-07-14 | 2023-08-08 | 永秀阀门有限公司 | Automatic clear ball valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4433501A1 (en) * | 1994-09-20 | 1996-03-21 | Siemens Ag | Repair sleeve and method for repairing a heat exchanger tube |
| JP2002168590A (en) * | 2000-12-01 | 2002-06-14 | Ishikawajima Harima Heavy Ind Co Ltd | Heat exchanger repair method |
| DE102004044528A1 (en) * | 2004-09-15 | 2006-03-30 | Heck & Becker Gmbh & Co. Kg | Repairing of cracked metal blocks used in die casting molds which have crack running through cooling channel comprises inserting tube which stretches across crack and sealing it to channel walls |
| WO2006121400A1 (en) * | 2005-05-10 | 2006-11-16 | Metso Power Ab | Insert tube and a system of insert tubes |
| CN101031355A (en) * | 2004-08-02 | 2007-09-05 | Ati资产公司 | Methods for replacing corroded fluid conducting parts in equipment via welding, and parts obtained thereby |
| CN101603795A (en) * | 2009-07-07 | 2009-12-16 | 甘肃中顺石化工程装备有限公司 | A kind of recovery repairing method of heat exchanger of sulphuric acid system |
| CN101949656A (en) * | 2010-09-10 | 2011-01-19 | 南通京通石墨设备有限公司 | Method for repairing shell and tube graphite heat exchanger |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60111895A (en) * | 1983-11-18 | 1985-06-18 | Mitsubishi Heavy Ind Ltd | Repair of pipe |
| BRPI0503134B1 (en) * | 2004-08-02 | 2018-03-20 | Rohm And Haas Company | Method of Forming a Laminated Tube Sheet |
-
2011
- 2011-04-03 CN CN201110091075A patent/CN102168934B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4433501A1 (en) * | 1994-09-20 | 1996-03-21 | Siemens Ag | Repair sleeve and method for repairing a heat exchanger tube |
| JP2002168590A (en) * | 2000-12-01 | 2002-06-14 | Ishikawajima Harima Heavy Ind Co Ltd | Heat exchanger repair method |
| CN101031355A (en) * | 2004-08-02 | 2007-09-05 | Ati资产公司 | Methods for replacing corroded fluid conducting parts in equipment via welding, and parts obtained thereby |
| DE102004044528A1 (en) * | 2004-09-15 | 2006-03-30 | Heck & Becker Gmbh & Co. Kg | Repairing of cracked metal blocks used in die casting molds which have crack running through cooling channel comprises inserting tube which stretches across crack and sealing it to channel walls |
| WO2006121400A1 (en) * | 2005-05-10 | 2006-11-16 | Metso Power Ab | Insert tube and a system of insert tubes |
| CN101603795A (en) * | 2009-07-07 | 2009-12-16 | 甘肃中顺石化工程装备有限公司 | A kind of recovery repairing method of heat exchanger of sulphuric acid system |
| CN101949656A (en) * | 2010-09-10 | 2011-01-19 | 南通京通石墨设备有限公司 | Method for repairing shell and tube graphite heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102168934A (en) | 2011-08-31 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170818 Address after: 024000, Hongshan District, the Inner Mongolia Autonomous Region Chifeng Dongcheng office, red flag Road neighborhood 10 Patentee after: Chifeng NFC Zinc Co., Ltd. Address before: 024000 the Inner Mongolia Autonomous Region Chifeng City Hongshan District, the eastern suburbs of Chifeng Zhongse Cooper Hong Ye zinc industry limited company Patentee before: CNKH |
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| TR01 | Transfer of patent right |