CN1903747A - Corrosion real time on line monitoring control device and method - Google Patents
Corrosion real time on line monitoring control device and method Download PDFInfo
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- CN1903747A CN1903747A CN 200510028160 CN200510028160A CN1903747A CN 1903747 A CN1903747 A CN 1903747A CN 200510028160 CN200510028160 CN 200510028160 CN 200510028160 A CN200510028160 A CN 200510028160A CN 1903747 A CN1903747 A CN 1903747A
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- corrosion
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Abstract
The present invention discloses corrosion real-time on-line monitoring control equipment. It includes a corrosion signal collecting component, a programmable controller and a chemicals-adding component. Said corrosion signal collecting component can be used for collecting corrosion signal and transferring it to said programmable controller, and said programmable controller can be used for controlling the operation of said chemicals-adding component according to the corrosion signal. Said invention also provides a method for utilizing the above-mentioned equipment to make corrosion real-time on-line monitoring control.
Description
Technical field
The present invention relates to the apparatus and method in a kind of industrial cycle water treatment, particularly a kind of corrosion real time on line monitoring control device and method that realizes on-line monitoring and control dosing.
Background technology
In industrial circulating cooling water system, water coolant constantly recycles in system, because the comprehensive action of the concentrated and multiple factors such as device structure and material of various mineral ions and organic substance in the rising of the temperature of water, the water, equipment can produce corrosion, threatens and destroy factory's long period ground safety in production.The field monitoring of corrosion situation is a Control Circulation cooling water system corrosion important evidence.Corrosion monitoring process commonly used in the cooling water system has: test piece method, bypass developmental tube method, linear polarization method and monitoring heat exchanger method.These field monitoring methods all can only realize can not realizing controlling medicine machine automatically by the corrosion situation to the monitoring of system's corrosion situation, thereby guarantee the stable of water quality, effectively reduce erosion rate.
Summary of the invention
The purpose of this invention is to provide a kind of corrosion real time on line monitoring control device and the method that when corrosion condition is monitored, can also control medicine machine.
The objective of the invention is to be achieved through the following technical solutions:
A kind of corrosion real time on line monitoring control device, comprise corrosion signals collecting assembly, programmable logic controller, dosing assembly, this corrosion signals collecting assembly collection corrosion signal passes to this programmable logic controller, and this programmable logic controller is according to this dosing assembly running of this corrosion signal control.
Wherein, this corrosion signals collecting assembly comprises a four-way electrode, a corrosion instrument that links to each other with this four-way electrode, an expansion module that links to each other with this corrosion instrument, and this expansion module links to each other with this programmable logic controller.
Wherein, this programmable logic controller comprises: a calculating device, and it goes out a plurality of erosion rate values according to the calculated signals that transmits from this expansion module, calculates the mean value of these erosion rate values then; A control device, its mean value according to above-mentioned erosion rate value is controlled this dosing assembly operating.
Wherein, this dosing assembly comprises: a rly. that links to each other with this programmable logic controller, a dosing pump that links to each other with this rly..
Wherein, this calculating device calculates five erosion rate values.
Wherein, this control device also is sent to display equipment with the mean value of this erosion rate value, and preserves this mean value.
Technical scheme of the present invention also comprises a kind of corrosion real time on-line monitoring control method of using above-mentioned corrosion real time on line monitoring control device, comprises the steps:
Step 1 is utilized described corrosion signals collecting assembly collection site data;
Step 2 uses described calculating device to calculate the erosion rate value according to the field data of gathering;
Step 3 has judged whether as calculated the erosion rate value of predetermined number, if carry out step 4, otherwise carries out step 1 and step 2;
Step 4 is utilized described calculating device that gained erosion rate value is removed extreme value and is tried to achieve mean value;
Step 5 utilizes described control device to judge that described mean value whether greater than the upper limit of setting, if then carry out step 7, otherwise carries out step 6;
Step 6 utilizes described control device to judge that whether described mean value is less than the lower limit of setting, if then carry out step 8;
Step 7 utilizes described control device to open this dosing pump by described rly.;
Step 8 utilizes described control device by this dosing pump of this cut-off;
Wherein, in step 3, calculate five erosion rate values.
This method also comprises send demonstration with this mean value, and preserves the step of this mean value, and this step is that fictitious time carries out at the Rule of judgment of step 6, perhaps carries out after step 7 or step 8 are finished.
Positive progressive effect of the present invention is: can carry out the on-line implement monitoring to the corrosive pipeline in the recirculating cooling water system, and can regulate dosing pump according to erosion rate and open, add inhibiter, thereby suppress erosion rate.
Description of drawings
Fig. 1 is the structural representation of first embodiment of the invention.
Fig. 2 is the workflow diagram of second embodiment of the invention.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
First embodiment
As shown in Figure 1, a kind of corrosion real time on line monitoring control device, comprise: corrosion signals collecting assembly 1, programmable logic controller 2, dosing assembly 3, this corrosion signals collecting assembly 1 is gathered the corrosion signal and is passed to this programmable logic controller 2, and this programmable logic controller 2 is according to these dosing assembly 3 runnings of this corrosion signal control.
Wherein, corrosion signals collecting assembly 1 comprises a four-way electrode 11, corrosion instrument that links to each other with this four-way electrode 11 12, an expansion module 13 that links to each other with this corrosion instrument 12.This four-way electrode 11 can be made metal probe according to the unlike material in the system, measure the erosion rate of unlike material in this system, this four-way electrode 11 is installed in the circulating water system 4, to obtain electrode signal, electrode channel of each box indicating among Fig. 1, the signal output part of this four-way motor 11 connects corrosion instrument 12 signal input parts, corrosion instrument 12 is converted into current signal with electrode signal, its output termination expansion module 13 signal input parts, expansion module 13 is converted into numerary signal with current signal, and its signal output part connects this programmable logic controller 2 signal input parts.
This programmable logic controller 2 comprises a calculating device 21 and a control device 22, this calculating device 21 goes out five erosion rate values according to the calculated signals that transmits from this expansion module 13, calculate the mean value of these erosion rate values then, this control device 22 is controlled this dosing assembly 3 operations according to the mean value of above-mentioned erosion rate value, and the mean value of this erosion rate value is sent to demonstration on the existing computer 5, this computer 5 can cover original numerical value by the up-to-date mean value of utilization, and preserves this mean value.
This dosing assembly 3 comprises a rly. 31 that links to each other with this programmable logic controller 2 and a dosing pump 32 that links to each other with this rly. 31, this rly. 31 is converted to 220VAC voltage make-and-break signal with numerary signal, these relay signal 31 these dosing pump 32 signal input parts of output termination are controlled its switching.
In the signal output part of this programmable logic controller 2, one connects existing computer 5 serial line interfaces by serial communication protocol, succeeds electrical equipment 31 signal incoming ends for one.
The four-way electrode can be the probe made from the interchanger material, the corrosion instrument can be selected commercially available FSY-A type intelligence corrosion tester for use, computer is an industrial computer, programmable logic controller can be selected the FXZN of Mitsubishi series for use, expansion module can be selected the FXZN-4AD of Mitsubishi series for use, pulse pump can be selected Milton-Roy P036 for use, and the rly. model can be selected OMRON MY4 for use, the optional CY-09 that uses of serial ports line model.
Second embodiment
As shown in Figure 2, a kind of method of utilizing said apparatus to corrode real time on-line monitoring control:
This calculating device 21 obtains the data (step 10) of being obtained by corrosion signals collecting assembly, according to the data computation erosion rate value of obtaining in the step 10 (step 20), five erosion rate values (step 30) have been judged whether as calculated, if then calculate according to the erosion rate value that obtains, remove extreme value average (step 40), if not, then forwarding step 10 to continues to obtain data and carries out step 20 calculating erosion rate value, control device 22 judges whether the mean value of being tried to achieve surpasses the higher limit (step 50) that is provided with, if surpass, then start this dosing pump (step 55), if do not surpass higher limit, then judge whether to be lower than the lower value (step 60) of setting, if be lower than lower value, then close dosing pump (step 65), this mean value of trying to achieve is passed to described computer 5 show (step 70), preserve this mean value (step 80).
After finishing said process, this programmable logic controller 2 is written into initialization data again, repeats above-mentioned steps then, proceeds monitoring.
In the various embodiments described above, the method for calculation of erosion rate value are prior aries, can adopt linear polarization method to calculate, and process is as follows:
Metal electrode (probe made from the interchanger material) is from spontaneous potential E
CorrThe ratio of potential variation Δ E (being generally 5-10mv) during to polarized polarized potential E and outside current density Δ I by this electrode is called polarization resistance R
p:
R
p＝(ΔE/Δi)
ΔE-0
Be in the metal electrode that is corroding under the spontaneous potential for one,, can release such Stern-Geary relational expression according to mixed potential theory:
R
p＝(ΔE/Δi)
ΔE-0＝B/i
corr
Wherein
Be called the polarization resistance constant, can measure by the technician in advance and calculate the back setting.
B wherein
aAnd b
c---the Tafel slope of anodic polarization curves and cathodic polarization curve
By R
pCan obtain i
CorrThereby, can be by following formula i
CorrBe converted into the metallic corrosion speed that depth of corrosion is represented
Corrosion speed=K[A/ (n * ρ)] * i
Corr
Wherein: A-metal relative atomic mass
i
Corr-corrosion electric current density, uA/cm
2
The variation of metallic valence before and after the n-corrosion
The density of ρ-metal, g/cm
3
The K-conversion constant, it is relevant with the unit of selected corrosion speed, for the mpy of unit, um/a, mm/a.The k value is respectively 0.129,3.27, and 0.00327
Claims (9)
1, a kind of corrosion real time on line monitoring control device, it is characterized in that, this device comprises corrosion signals collecting assembly, programmable logic controller, dosing assembly, this corrosion signals collecting assembly collection corrosion signal passes to this programmable logic controller, and this programmable logic controller is according to this dosing assembly running of this corrosion signal control.
2, corrosion real time on line monitoring control device according to claim 1, it is characterized in that, this corrosion signals collecting assembly comprises a four-way electrode, a corrosion instrument that links to each other with this four-way electrode, an expansion module that links to each other with this corrosion instrument, and this expansion module links to each other with this programmable logic controller.
3, corrosion real time on line monitoring control device according to claim 2, it is characterized in that, this programmable logic controller comprises: a calculating device, and it goes out a plurality of erosion rate values according to the calculated signals that transmits from this expansion module, calculates the mean value of these erosion rate values then; A control device, its mean value according to above-mentioned erosion rate value is controlled this dosing assembly operating.
4, corrosion real time on line monitoring control device according to claim 3 is characterized in that, this dosing assembly comprises: a rly. that links to each other with this programmable logic controller, a dosing pump that links to each other with this rly..
5, corrosion real time on line monitoring control device according to claim 4 is characterized in that, this calculating device calculates five erosion rate values.
6, corrosion real time on line monitoring control device according to claim 5 is characterized in that, this control device also is sent to display equipment with the mean value of this erosion rate value, and preserves this mean value.
7, a kind of use corrosion real time on-line monitoring control method of corrosion real time on line monitoring control device according to claim 1 comprises the steps:
Step 1 is utilized described corrosion signals collecting assembly collection site data;
Step 2 uses described calculating device to calculate the erosion rate value according to the field data of gathering;
Step 3 has judged whether as calculated the erosion rate value of predetermined number, if carry out step 4, otherwise carries out step 1 and step 2;
Step 4 is utilized described calculating device that gained erosion rate value is removed extreme value and is tried to achieve mean value;
Step 5 utilizes described control device to judge that described mean value whether greater than the upper limit of setting, if then carry out step 7, otherwise carries out step 6;
Step 6 utilizes described control device to judge that whether described mean value is less than the lower limit of setting, if then carry out step 8;
Step 7 utilizes described control device to open this dosing pump by described rly.;
Step 8 utilizes described control device by this dosing pump of this cut-off.
8, corrosion real time on-line monitoring control method according to claim 7 is characterized in that, calculates five erosion rate values in step 3.
9, corrosion real time on-line monitoring control method according to claim 8, it is characterized in that it also comprises and send demonstration with this mean value, and preserves the step of this mean value, this step is that fictitious time carries out at the Rule of judgment of step 6, perhaps carries out after step 7 or step 8 are finished.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510028160 CN1903747A (en) | 2005-07-27 | 2005-07-27 | Corrosion real time on line monitoring control device and method |
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| CN 200510028160 CN1903747A (en) | 2005-07-27 | 2005-07-27 | Corrosion real time on line monitoring control device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102282411A (en) * | 2009-01-19 | 2011-12-14 | Bp北美公司 | Method and system for predicting corrosion rates using mechanistic models |
| CN102507430A (en) * | 2011-11-11 | 2012-06-20 | 天津亿利科能源科技发展股份有限公司 | Online monitoring device for corrosion in pipeline |
| CN111579642A (en) * | 2020-05-28 | 2020-08-25 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Circulating cooling water pipeline corrosion damage inhibition device and inhibition method |
-
2005
- 2005-07-27 CN CN 200510028160 patent/CN1903747A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102282411A (en) * | 2009-01-19 | 2011-12-14 | Bp北美公司 | Method and system for predicting corrosion rates using mechanistic models |
| US8447529B2 (en) | 2009-01-19 | 2013-05-21 | Bp Corporation North America Inc. | Method and system for predicting corrosion rates using mechanistic models |
| CN102282411B (en) * | 2009-01-19 | 2013-11-13 | Bp北美公司 | Method and system for predicting corrosion rates using mechanistic models |
| CN102507430A (en) * | 2011-11-11 | 2012-06-20 | 天津亿利科能源科技发展股份有限公司 | Online monitoring device for corrosion in pipeline |
| CN111579642A (en) * | 2020-05-28 | 2020-08-25 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Circulating cooling water pipeline corrosion damage inhibition device and inhibition method |
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