CN102492954A - Damage monitoring method for pickling line graphite heat exchanger - Google Patents
Damage monitoring method for pickling line graphite heat exchanger Download PDFInfo
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- CN102492954A CN102492954A CN2011104105742A CN201110410574A CN102492954A CN 102492954 A CN102492954 A CN 102492954A CN 2011104105742 A CN2011104105742 A CN 2011104105742A CN 201110410574 A CN201110410574 A CN 201110410574A CN 102492954 A CN102492954 A CN 102492954A
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Abstract
The invention provides a damage monitoring method for a graphite heat exchanger used on a strip steel pickling line. A conductivity meter 5 is arranged at the position of a condensation water returning pipe 4 of the graphite heat exchanger 1 and used for directly measuring the conductivity of condensation water. Whether the graphite heat exchanger is damaged and whether acid is leaked can be judged according to change of the conductivity. The conductivity meter is connected with an alarm device, real-time monitoring can be obtained by a programmable logic controller which is used for inputting analog quantity to an operation table 6, and conductivity values can be read from a dial of the conductivity meter or the operation table. The damage monitoring method can monitor running situation of the graphite heat exchanger in real time, the heat exchanger can be replaced timely, heating and concentration of acid liquor are guaranteed, the condensation water can be effectively recycled, water resource is saved, and quality of pickling is guaranteed.
Description
Technical field
The present invention relates to the graphite heat exchanger damage monitoring method on a kind of metal plate and belt pickling line.
Background technology
At present, in the metal plate and belt cold-rolled process and on metal plate and belt plating and the galvanization production line, all need metal plate and belt is carried out pickling.The pickling line in past all adopts steam directly to feed the heating means of acid solution, but this method can produce a large amount of acid mists, has strengthened the load of air draft exhaust steam system; Cover under the poorly sealed situation at groove, acid mist escapes environment and place is caused serious corrosive nature, and uses the steam heating water of condensation; Constantly diluting soln reduces acid concentration fast, thereby makes the pickling effect variation; Occur metal plate and belt cleaning dirty, owe defective such as pickling, and the spent acid amount increases, and will cause the recovery system imbalance; The part of draining spent acid increases the acid consumption, causes production cost higher.For overcoming above drawback, acid solution is added thermal recovery graphite heat exchanger indirect heating replace steam direct heating of the prior art, can avoid steam directly to contact with acid solution, reduce the volatilization of acid mist, prevent the acid solution waste, environmental pollution.
Steam-heated form is adopted in the graphite heat exchanger heat exchange of adopting at present, and steam forms water of condensation through behind the graphite heat exchanger, and for the conserve water resource, the water of condensation of general interchanger is recyclable as the rinse water that clean section.But owing to adopt the mode of inside and outside convection current between the graphite block, under the effect of high temperature and acid solution impact load, the time one is long; The mechanical seal of sealing, sour pump, ball valve etc. are prone to corrosion damage between graphite block; Leak easily, cause the return water pipe of acid solution inflow heat exchanger, badly damaged interchanger; Influence the metal plate and belt pickling quality, and pollute the water of condensation water tank.If adopted the water after the pollution to carry out rinsing acid solution will be remained on the metal plate and belt, and cause metal plate and belt cleaning dirty, influence the surface quality of metal plate and belt.
Summary of the invention
Whether the present invention is directed to the deficiency of above technical scheme, proposed a kind of pickling line graphite heat exchanger damage monitoring way, in time monitoring graphite heat exchanger has damage and sour seepage takes place.
The technical scheme that the present invention adopted is:
Conductivity meter is installed at condensate ruturn pipe place at graphite heat exchanger; Directly measure the condensation electrical conductivity of water; Judge according to the variation of specific conductivity whether graphite heat exchanger has damage and sour seepage takes place, and conductivity meter is connected with warning device, and the programmable logic controller that is input to operator's console through analog quantity is monitored in real time; Electric conductivity value can be read in the dial plate by conductivity meter, also can on operator's console, read.
When the graphite heat exchanger works better, the water of condensation specific conductivity that records is definite value A, can be used as the rinse water of rinsing section; When the water of condensation specific conductivity that records increases suddenly; Compare with definite value A, when differing big, alarm equipment alarm; Think that then graphite heat exchanger has damaged and sour seepage takes place; When equipment is out of service, graphite heat exchanger is overhauled or changes, the water of condensation in the condensation water pot is handled accordingly and is drained after up to standard, no longer is used for doing cleaning section rinse water.
The invention has the beneficial effects as follows: adopt the present invention to monitor the running condition of graphite heat exchanger in real time, when interchanger was damaged, the liquid conduction rate in the interchanger increased; Send the signal emergency alarm; In time change the graphite heat exchanger that damages, reclaim water of condensation and effectively utilize the conserve water resource; Guarantee the quality of pickling, prevent contaminate environment.
Description of drawings
Fig. 1 is a pickling line graphite heat exchanger damage monitoring way structure principle chart of the present invention
Among Fig. 1: graphite heat exchanger 1, condensation water pot 2, vapour pipe 3, condensate ruturn pipe 4, conductivity meter 5, operator's console 6
Embodiment
In order to be illustrated more clearly in the technical scheme among the present invention, in detail, intactly narrate pickling line graphite heat exchanger damage monitoring way of the present invention below in conjunction with accompanying drawing.
As shown in the figure, acid solution is extracted out from acid tank through sour pump and is sent into graphite heat exchanger 1, and the top from graphite heat exchanger after graphite heat exchanger 1 heating flows back to acid tank, like the pipeline flow direction that does not mark among the figure.Graphite heat exchanger 1 send acid solution to send into steam through vapour pipe 3 after 2 minutes, and the steam of sending into forms water of condensation through graphite heat exchanger 1 back, and water of condensation is sent into condensation water pot 2 through TFL 4.4 places are equipped with conductivity meter 5 at return water pipe; Can directly measure the condensation electrical conductivity of water, judge that according to the variation of specific conductivity whether graphite heat exchanger 1 has damage and sour seepage takes place, and is connected with warning device with conductivity meter 5; Conductivity meter 5 records electric conductivity value is input to operator's console 6 through analog quantity programmable logic controller; Electric conductivity value can be read in the dial plate by conductivity meter 5, also can in operator's console 6, read, and accomplishes the real-time monitoring to graphite heat exchanger 1 running condition thus.
When graphite heat exchanger 1 works better, the water of condensation specific conductivity that records is about definite value A, proves not have sour seepage, and the water of condensation reuse can be used as the rinse water of rinsing section; When the water of condensation conductivity value that records increases suddenly; Greater than definite value A, alarm equipment alarm thinks that then graphite heat exchanger has damaged and sour seepage takes place; Because the damage of graphite heat exchanger is little to the pickling quality influence in the short period of time; So when equipment is out of service, can overhauls or change graphite heat exchanger, the water of condensation in the condensation water pot be handled accordingly and is drained after up to standard, no longer is used for doing cleaning section rinse water.After treating that maintenance is good or changing graphite heat exchanger, carry out pickling again, treat that the water of condensation specific conductivity in the condensation water pot returns to electrical conductivity of water value definite value A; Can be as the rinse water that clean section; The graphite heat exchanger works better continues the acid solution that gets into acid tank is heated system's works better.
Claims (4)
1. pickling line graphite heat exchanger damage monitoring method; It mainly is to locate to install conductivity meter (5) at the condensate ruturn pipe of graphite heat exchanger (1) (4); Directly measure the condensation electrical conductivity of water, judge according to the variation of specific conductivity whether graphite heat exchanger has damage and sour seepage takes place.
2. pickling line graphite heat exchanger damage monitoring method according to claim 1 is characterized by, and when the graphite heat exchanger works better, the water of condensation specific conductivity that records is about definite value A, and the water of condensing surface can be used as the rinse water recycle of making the rinsing section.
3. pickling line graphite heat exchanger damage monitoring method according to claim 1 is characterized by, when the water of condensation specific conductivity that records increases suddenly; Greater than definite value A; Alarm equipment alarm thinks that then graphite heat exchanger has damaged and sour seepage takes place, and overhauls or changes graphite heat exchanger when equipment is out of service; Water of condensation in the condensation water pot (2) is handled accordingly and is drained after up to standard, no longer is used for doing cleaning section rinse water.
4. a kind of pickling line graphite heat exchanger damage monitoring method one of said according to claim 1-3; It is characterized in that: conductivity meter (5) is connected with warning device; The programmable logic controller that is input to operator's console (6) through analog quantity is monitored in real time; Electric conductivity value can be read in the dial plate by conductivity meter, also can on operator's console, read.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104105742A CN102492954A (en) | 2011-12-12 | 2011-12-12 | Damage monitoring method for pickling line graphite heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104105742A CN102492954A (en) | 2011-12-12 | 2011-12-12 | Damage monitoring method for pickling line graphite heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN102492954A true CN102492954A (en) | 2012-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2011104105742A Pending CN102492954A (en) | 2011-12-12 | 2011-12-12 | Damage monitoring method for pickling line graphite heat exchanger |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535274A (en) * | 2014-12-25 | 2015-04-22 | 瓮福（集团）有限责任公司 | Method for rapidly judging leakage of heater |
| CN108910985A (en) * | 2018-08-10 | 2018-11-30 | 中化蓝天霍尼韦尔新材料有限公司 | A kind of lime set processing system and processing method |
| CN116097077A (en) * | 2022-06-17 | 2023-05-09 | 株式会社荏原制作所 | Leakage determination method and plating apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5800694A (en) * | 1995-02-15 | 1998-09-01 | Andritz-Patentverwaltungs-Gesellschaft M.B.H. | Process and plant for pickling materials made of steel, in particular stainless steel |
| CN2561099Y (en) * | 2002-08-05 | 2003-07-16 | 广州市高澜水技术有限公司 | Closed circulating water cooling apparatus |
| CN201364231Y (en) * | 2008-12-30 | 2009-12-16 | 上海电气电站设备有限公司 | Water leakage detector for vapour-cooled generators |
| CN201788060U (en) * | 2010-09-10 | 2011-04-06 | 苏州市中新动力设备辅机有限公司 | Condensed water sampling and leakage detection device for steam condenser |
-
2011
- 2011-12-12 CN CN2011104105742A patent/CN102492954A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5800694A (en) * | 1995-02-15 | 1998-09-01 | Andritz-Patentverwaltungs-Gesellschaft M.B.H. | Process and plant for pickling materials made of steel, in particular stainless steel |
| CN2561099Y (en) * | 2002-08-05 | 2003-07-16 | 广州市高澜水技术有限公司 | Closed circulating water cooling apparatus |
| CN201364231Y (en) * | 2008-12-30 | 2009-12-16 | 上海电气电站设备有限公司 | Water leakage detector for vapour-cooled generators |
| CN201788060U (en) * | 2010-09-10 | 2011-04-06 | 苏州市中新动力设备辅机有限公司 | Condensed water sampling and leakage detection device for steam condenser |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535274A (en) * | 2014-12-25 | 2015-04-22 | 瓮福（集团）有限责任公司 | Method for rapidly judging leakage of heater |
| CN108910985A (en) * | 2018-08-10 | 2018-11-30 | 中化蓝天霍尼韦尔新材料有限公司 | A kind of lime set processing system and processing method |
| CN116097077A (en) * | 2022-06-17 | 2023-05-09 | 株式会社荏原制作所 | Leakage determination method and plating apparatus |
| CN116097077B (en) * | 2022-06-17 | 2024-02-27 | 株式会社荏原制作所 | Leakage determination method and plating apparatus |
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Application publication date: 20120613 |