CN105202522B - A kind of diagnostic method of direct current cooker corrosion and scaling risk - Google Patents
A kind of diagnostic method of direct current cooker corrosion and scaling risk Download PDFInfo
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- CN105202522B CN105202522B CN201510644870.7A CN201510644870A CN105202522B CN 105202522 B CN105202522 B CN 105202522B CN 201510644870 A CN201510644870 A CN 201510644870A CN 105202522 B CN105202522 B CN 105202522B
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- 238000005260 corrosion Methods 0.000 title claims abstract description 76
- 230000007797 corrosion Effects 0.000 title claims abstract description 75
- 238000002405 diagnostic procedure Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- 238000000034 method Methods 0.000 claims abstract description 30
- 239000003814 drug Substances 0.000 claims abstract description 28
- 238000012544 monitoring process Methods 0.000 claims abstract description 26
- 239000000126 substance Substances 0.000 claims abstract description 23
- 238000011010 flushing procedure Methods 0.000 claims abstract description 14
- 238000003745 diagnosis Methods 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 36
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 34
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 21
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 21
- 229910052802 copper Inorganic materials 0.000 claims description 21
- 239000010949 copper Substances 0.000 claims description 21
- 239000001257 hydrogen Substances 0.000 claims description 21
- 229910052739 hydrogen Inorganic materials 0.000 claims description 21
- 239000000377 silicon dioxide Substances 0.000 claims description 20
- 239000011734 sodium Substances 0.000 claims description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 18
- 239000001301 oxygen Substances 0.000 claims description 18
- 229910052760 oxygen Inorganic materials 0.000 claims description 18
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 16
- 229910052708 sodium Inorganic materials 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 15
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 238000000746 purification Methods 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 230000005856 abnormality Effects 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 150000001450 anions Chemical class 0.000 claims description 4
- 230000015271 coagulation Effects 0.000 claims description 4
- 238000005345 coagulation Methods 0.000 claims description 4
- 229910052681 coesite Inorganic materials 0.000 claims description 4
- 238000012790 confirmation Methods 0.000 claims description 4
- 229910052906 cristobalite Inorganic materials 0.000 claims description 4
- 238000010612 desalination reaction Methods 0.000 claims description 4
- 230000003628 erosive effect Effects 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 claims description 4
- 238000009533 lab test Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- 238000003672 processing method Methods 0.000 claims description 4
- 238000012797 qualification Methods 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 229910052682 stishovite Inorganic materials 0.000 claims description 4
- 229910052905 tridymite Inorganic materials 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 3
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- 238000001514 detection method Methods 0.000 claims 1
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000001996 bearing alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 carbon ion Chemical class 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses one kind to have assessment and diagnosis direct current cooker corrosion, the method of fouling risk, whether mainly including 9 risk factors direct current cookers operations, whether there is or not reasonable protection of boiler during shutdown period measures, whether reasonable water flushing is carried out, direct current cooker water supply system whether cupric, whether reasonable water process mode is used, whether chemical instruments are complete, medicine machine reliabilty and availability whether with higher, whether monitoring data are qualified, whether handled in time by tertiary treatment principle, the diagnostic method step by step of system is consequently formed, corrosion is obtained to judge, fouling tendency is serious or without heavy corrosion, the conclusion of fouling tendency.The method of the present invention can understand in advance the factor of boiler corrosion, fouling, so that the corrosion rate of boiler plant be effectively reduced, reduce boiler tube deposit and amount of scale buildup, improve steam quality, guarantee the safe and economic operation of unit.
Description
Technical field
The present invention relates to a kind of methods that boiler corrosion, fouling risk diagnose, and in particular in a kind of diagnosis direct current cooker
Heat power equipment occur corrosion and fouling risk method.
Background technique
Electric power is the important foundation industry of national economy and social development, the safety in production of electric power enterprise be related to country and
People life property safety is related to national economy sound development, is related to the popular feeling and social stability.Statistics shows: because
Malicious event caused by boiler corrosion, fouling accounts for the overwhelming majority of power generation accident, and the China Jin20Nian Zhong has recorded 40533 altogether
Secondary generator tube damage accident, wherein 80% boiler-tube failure causes the accidental shutdown of power plant.Therrmodynamic system water is vouched at present
Vapour quality is to diagnose the main method of boiler steam system corrosion, fouling risk, according to the analysis test result of carbonated drink index, really
Determine the water-chemical regime of heat power equipment, the problems such as decision-making system is with the presence or absence of heat power equipment fouling, corrosion.But direct current cooker is one
A huge, complicated system, can cause the factor of boiler system corrosion and scaling very much, only by analyzing steam index
Therefore, it is determined that the corrosion and scaling risk of system has certain limitation.Therefore, a kind of direct current cooker more rationally, scientific is found
Corrosion and scaling diagnosis of risk method is very necessary to the safety of unit and economical operation and is of great significance.
Summary of the invention
To solve the above problems, the present invention provides a kind of pair of direct current cooker corrosion and scaling risks to examine
Disconnected method can understand in advance the factor of boiler corrosion, fouling by this method, so that the corrosion of boiler plant be effectively reduced
Rate reduces boiler tube deposit and amount of scale buildup, improves steam quality, guarantees the safe and economic operation of unit.
In order to achieve the above objectives, the method for the present invention pass through first analysis determined influence direct current cooker corrosion and scaling risk
Several important risk factors, specifically include that direct current cooker operation whether, whether there is or not reasonable protection of boiler during shutdown period measures, if into
The reasonable water of row rinses, direct current cooker water supply system whether cupric, if use reasonable water process mode, chemical instruments are whether
Complete, medicine machine reliabilty and availability whether with higher, whether monitoring data qualified, if presses tertiary treatment principle
Processing in time.Then these risk factors are investigated step by step, form the diagnostic process of system, finally obtain boiler corrosion,
Fouling tendency is serious or the conclusion without heavy corrosion, fouling tendency.
The purpose of the present invention is to provide a kind of diagnostic methods of direct current cooker corrosion and scaling risk.
The technical solution used in the present invention is:
A kind of diagnostic method of direct current cooker corrosion and scaling risk, comprising the following steps:
When direct current cooker is operating status, diagnostic method are as follows:
1) investigate direct current cooker water supply system whether cupric, except condenser；If water supply system not cupric, direct current cooker
The Water purification mode of use should be all-volatile treatment mode；If water supply system cupric, the Water purification side of direct current cooker use
Formula should be reproducibility all-volatile treatment mode；This requirement is not met, then is determined as that boiler corrosion, fouling tendency are serious；
2) above-mentioned water process mode meets the requirements, then enters and diagnose in next step；Whether neat investigate direct current cooker chemical instruments
Entirely, if chemical instruments are not complete, it is determined as that boiler corrosion, fouling tendency are serious；
3) above-mentioned chemical instruments are complete, then enter and diagnose in next step；It investigates direct current cooker medicine machine and whether instrument has
There is reliabilty and availability, if medicine machine and instrument do not have reliabilty and availability, is determined as that boiler corrosion, fouling incline
To serious；
4) above-mentioned direct current cooker medicine machine and instrument meet the requirements, then enter and diagnose in next step；Investigating monitoring data is
The no regulation for meeting 12145 exposure draft of GB/T that 2015 announce then is determined as such as monitoring data qualification without serious rotten
Lose fouling tendency；
If 5) above-mentioned monitoring data are undesirable, enter and diagnose in next step；Investigate whether by tertiary treatment principle and
When handle, do not handled in time according to tertiary treatment principle such as, be then determined as that corrosion and scaling tendency is serious；Since then, direct current cooker is transported
Corrosion and scaling diagnosis of risk in row situation terminates；
When direct current cooker is stoppage in transit state, diagnostic method are as follows:
A) it whether first investigates using reasonable furnace stopping maintenance measure, i.e., when boiler down time is no more than seven days, use is wet
Protection Code；Down time is more than seven days using dry Protection Code；If protection of boiler during shutdown period measure is undesirable, it is determined as burn into knot
Dirt tendency is serious；
Whether b) above-mentioned protection of boiler during shutdown period measure meets the requirements, then enters and diagnose in next step, closed before investigating boiler operatiopn
The water of reason rinses, if not carrying out reasonable water rinses just operation boiler, is determined as that corrosion and scaling tendency is serious；
C) above-mentioned water flushing meets the requirements, then boiler can operate normally, and is operation shape hence into above-mentioned direct current cooker
Diagnosis process when state.
Further, all-volatile treatment described in step 1) includes reproducibility all-volatile treatment, oxidisability all-volatile treatment
And oxygenated treatment.
Further, chemical instruments described in step 2) include that hand surveys instrument and in-line meter.
Further, chemical instruments described in step 2) include conductivity meter, pH meter, atomic absorption instrument, silicon table, sodium table,
Oxygen table, ion chromatograph, phosphate radical table, TOC instrument and highly sensitive hydrogen detector.
Further, the step 3) medicine machine and the reliabilty and availability of instrument refer to: medicine machine and instrument
It is able to satisfy manual, the automatic running demand of power plant, medicine machine can accurately control dosage, and instrument can accurately reflect water quality
Truth, measurement error are small.
Further, the step 4) monitoring data are the monitoring data of therrmodynamic system water and steam quality.
Further, the monitoring data of above-mentioned therrmodynamic system water and steam quality include quality of steam, boiler feedwater quality, condensation
Water quality, boiler feedwater quality, generator cooling-water quality.
Further, above-mentioned quality of steam index includes Na content, hydrogen conductivity, dioxide-containing silica, iron content and copper
Content；
Further, above-mentioned boiler feedwater quality index includes that the hardness of water supply, dissolved oxygen, iron content, copper content, sodium contain
Amount, dioxide-containing silica, hydrogen conductivity, pH value, hydrazine content, corrosivity anion and total content of organic carbon；
Further, above-mentioned condensed water quality index includes hardness, sodium content, dissolved oxygen content, hydrogen conductivity；And warp
Dioxide-containing silica, sodium content, iron content, corrosivity anion-content, copper content and hydrogen conductivity in water after precision processing desalination；
Above-mentioned boiler feedwater quality index includes that dioxide-containing silica, sweet-water tank water inlet conductivity, sweet-water tank go out
Water conductivity, TOCi content；And pH, conductivity, copper content and the dissolved oxygen of generator cooling-water.
Further, step 5) the tertiary treatment principle are as follows: when Water Vapor Quality deterioration, the representative of rapid censored sample
Property, result of laboratory test accuracy, and in overall analysis system water, vapour quality variation, confirmation judge it is errorless after, by following three-level
Treatment principle executes:
Coagulation: caused by having because of impurity a possibility that corrosion and scaling, salification, should restore in 72h to corresponding standard
Value；
Two stage treatment: caused by having certainly because of impurity a possibility that corrosion and scaling, salification, should restore interior for 24 hours to corresponding
Standard value；
Tertiary treatment: occurring fast erosion, fouling, salification, if water quality does not improve in 4h, answers blowing out；
In every level-one of abnormality processing, if cannot still restore normal before the deadline, it should use higher by one
The processing method of grade.
Further, step b) the reasonable water rinses are as follows: cold conditions flushing is carried out to boiler first, then to boiler into
The hot flushing of row；Simultaneously, it is ensured that water quality reaches standard requirements, especially iron concentration, wants when boiler water quality reaches following
When asking, it can terminate to rinse: Fe < 100ppb；DO < 10ppb；SiO20.5 μ S/cm of < 30ppb, conductivity <.
The beneficial effects of the present invention are:
The present invention is compared with traditional boiler corrosion, fouling risk evaluation method, not merely using Steam-water Quality as diagnosis
Unique foundation of boiler steam system corrosion, fouling risk, while also having investigated and whether having used reasonable protection of boiler during shutdown period measure, being
It is no to carry out whether complete reasonable water flushing, chemical instruments, medicine machine and instrument reliability whether with higher and available
Property etc. risk factors, be consequently formed the diagnostic method step by step of system, this method for direct current cooker corrosion and scaling diagnosis of risk more
It is scientific, reasonable.
The method of the present invention can understand in advance the factor of boiler corrosion, fouling, so that the corrosion of boiler plant be effectively reduced
Rate reduces boiler tube deposit and amount of scale buildup, improves steam quality, guarantees the safe and economic operation of unit.
Detailed description of the invention
Fig. 1 is diagnostic flow chart of the invention, and (1)~(9) are the several important of influence direct current cooker corrosion and scaling risk
Risk factors, it is each to indicate are as follows: (1) that whether direct current cooker runs；(2) once-through boiler whether cupric；(3) whether using conjunction
The water process mode of reason；(4) whether chemical instruments are complete；(5) medicine machine and instrument reliability whether with higher and can
The property used；(6) whether monitoring data are qualified；(7) whether handled in time by tertiary treatment principle；(8) whether reasonable blowing out is used
Safeguard measure；(9) reasonable water flushing whether is carried out.
Specific embodiment
A kind of diagnostic method of direct current cooker corrosion and scaling risk, comprising the following steps:
When direct current cooker is operating status, diagnostic method are as follows:
1) investigate direct current cooker water supply system whether cupric, except condenser；If water supply system not cupric, direct current cooker
The Water purification mode of use should be all-volatile treatment mode；If water supply system cupric, the Water purification side of direct current cooker use
Formula should be reproducibility all-volatile treatment mode；This requirement is not met, then is determined as that boiler corrosion, fouling tendency are serious；
2) above-mentioned water process mode meets the requirements, then enters and diagnose in next step；Whether neat investigate direct current cooker chemical instruments
Entirely, if chemical instruments are not complete, it is determined as that boiler corrosion, fouling tendency are serious；
3) above-mentioned chemical instruments are complete, then enter and diagnose in next step；It investigates direct current cooker medicine machine and whether instrument has
There is reliabilty and availability, if medicine machine and instrument do not have reliabilty and availability, is determined as that boiler corrosion, fouling incline
To serious；
4) above-mentioned direct current cooker medicine machine and instrument meet the requirements, then enter and diagnose in next step；Investigating monitoring data is
The no regulation for meeting 12145 exposure draft of GB/T that 2015 announce then is determined as such as monitoring data qualification without serious rotten
Lose fouling tendency；
If 5) above-mentioned monitoring data are undesirable, enter and diagnose in next step；Investigate whether by tertiary treatment principle and
When handle, do not handled in time according to tertiary treatment principle such as, be then determined as that corrosion and scaling tendency is serious；Since then, direct current cooker is transported
Corrosion and scaling diagnosis of risk in row situation terminates；
When direct current cooker is stoppage in transit state, diagnostic method are as follows:
A) it whether first investigates using reasonable furnace stopping maintenance measure, i.e., when boiler down time is no more than seven days, use is wet
Protection Code；Down time is more than seven days using dry Protection Code；If protection of boiler during shutdown period measure is undesirable, it is determined as burn into knot
Dirt tendency is serious；
Whether b) above-mentioned protection of boiler during shutdown period measure meets the requirements, then enters and diagnose in next step, closed before investigating boiler operatiopn
The water of reason rinses, if not carrying out reasonable water rinses just operation boiler, is determined as that corrosion and scaling tendency is serious；
C) above-mentioned water flushing meets the requirements, then boiler can operate normally, and is operation shape hence into above-mentioned direct current cooker
Diagnosis process when state.
Preferably, all-volatile treatment described in step 1) include reproducibility all-volatile treatment, oxidisability all-volatile treatment and
Oxygenated treatment.
Preferably, chemical instruments described in step 2) include that hand surveys instrument and in-line meter.
Preferably, chemical instruments described in step 2) include conductivity meter, pH meter, atomic absorption instrument, silicon table, sodium table, oxygen
Table, ion chromatograph, phosphate radical table, TOC instrument and highly sensitive hydrogen detector.
Preferably, the step 3) medicine machine and the reliabilty and availability of instrument refer to: medicine machine and instrument energy
Meet manual, the automatic running demand of power plant, medicine machine can accurately control dosage, and instrument can accurately reflect the true of water quality
Truth condition, measurement error are small.
Preferably, the step 4) monitoring data are the monitoring data of therrmodynamic system water and steam quality.
Preferably, the monitoring data of above-mentioned therrmodynamic system water and steam quality include quality of steam, boiler feedwater quality, condensed water
Quality, boiler feedwater quality, generator cooling-water quality.
Preferably, above-mentioned quality of steam index includes that Na content, hydrogen conductivity, dioxide-containing silica, iron content and copper contain
Amount；
Preferably, above-mentioned boiler feedwater quality index includes that the hardness of water supply, dissolved oxygen, iron content, copper content, sodium contain
Amount, dioxide-containing silica, hydrogen conductivity, pH value, hydrazine content, corrosivity anion and total content of organic carbon；
Preferably, above-mentioned condensed water quality index includes hardness, sodium content, dissolved oxygen content, hydrogen conductivity；And through essence
Handle after desalination dioxide-containing silica, sodium content, iron content, corrosivity anion-content, copper content and hydrogen conductivity in water；
Preferably, above-mentioned corrosivity anion is Cl-And SO4 2-；
Above-mentioned boiler feedwater quality index includes that dioxide-containing silica, sweet-water tank water inlet conductivity, sweet-water tank go out
Water conductivity, TOCi content；And pH, conductivity, copper content and the dissolved oxygen of generator cooling-water.
Preferably, step 5) the tertiary treatment principle are as follows: when Water Vapor Quality deterioration, the representative of rapid censored sample
Property, result of laboratory test accuracy, and in overall analysis system water, vapour quality variation, confirmation judge it is errorless after, by following three-level
Treatment principle executes:
Coagulation: caused by having because of impurity a possibility that corrosion and scaling, salification, should restore in 72h to corresponding standard
Value；
Two stage treatment: caused by having certainly because of impurity a possibility that corrosion and scaling, salification, should restore interior for 24 hours to corresponding
Standard value；
Tertiary treatment: occurring fast erosion, fouling, salification, if water quality does not improve in 4h, answers blowing out；
In every level-one of abnormality processing, if cannot still restore normal before the deadline, it should use higher by one
The processing method of grade.
Preferably, step b) the reasonable water rinses are as follows: carries out cold conditions flushing to boiler first, then carries out to boiler
Hot flushing；Simultaneously, it is ensured that water quality reaches standard requirements, especially iron concentration, when boiler water quality reaches claimed below
When, it can terminate to rinse: Fe < 100ppb；DO < 10ppb；SiO20.5 μ S/cm of < 30ppb, conductivity <.
The method of the present invention is described in further detail below with reference to Fig. 1 and specific embodiment.
A kind of diagnostic method of the direct current cooker corrosion and scaling risk of embodiment 1
Flow chart as shown in connection with fig. 1 is described in detail the method for the present invention, diagnostic method of the present invention investigate the
Whether one risk factors is whether (1) direct current cooker runs, run according to direct current cooker, determine boiler corrosion, fouling tendency
Judge route.
Direct current cooker is operating status
Under operation such as boiler, then investigate risk factors (2) direct current cooker water supply system whether copper-bearing alloy component
Thus water supply system has been divided into copper system system and united without copper system, for different water supply systems, investigated by (not including condenser)
Risk factors (3) whether use reasonable water process mode, the Water purification mode that no copper direct current cooker uses for full volatilization at
Reason, including reproducibility all-volatile treatment [AVT (R)], oxidisability all-volatile treatment [AVT (O)] and oxygenated treatment [OT]；If having
Copper system system, then water supply system cannot (including AVT (O) and OT) if not meeting this regulation, sentences using oxidisability Water purification
It is serious to be set to boiler corrosion, fouling tendency.
Water process mode is reasonable, then enters and diagnose in next step；Whether complete investigate risk factors (4) chemical instruments, chemistry
Instrument includes that hand surveys instrument and in-line meter, mainly have (hydrogen) conductivity meter, pH meter, atomic absorption instrument, silicon table, sodium table, oxygen table,
Ion chromatograph, phosphate radical table, TOC instrument, highly sensitive hydrogen detector etc..If chemical instruments are not complete enough, it cannot reflect boiler
The overall condition of water quality is then determined as that boiler corrosion, fouling tendency are serious.
Chemical instruments are complete, then enter and diagnose in next step.Whether investigation risk factors (5) medicine machine and instrument have can
By property and availability, (medicine machine and instrument are able to satisfy manual, the automatic running demand of power plant, and medicine machine can be controlled accurately
Dosage, instrument can accurately reflect the truth of water quality, and measurement error is small), if medicine machine and instrument do not have reliability
And availability, it cannot really reflect boiler water quality situation, medicine machine reliability and availability are low, and boiler water quality can be caused different
Often, then it is determined as that boiler corrosion, fouling tendency are serious.
Such as medicine machine and instrument reliability with higher and availability, then enters and diagnose in next step.Investigate risk because
Whether plain (6) monitoring data are qualified, and therrmodynamic system water and steam quality is the principal element for influencing boiler corrosion, fouling risk, steam
The supervision of quality includes quality of steam (Na, hydrogen conductivity, silica, iron, copper), and boiler feedwater quality is (hardness of water supply, molten
Solve oxygen, iron, copper, sodium, the content of silica and hydrogen conductivity, pH value, hydrazine, dissolved oxygen and total organic carbon (TOC)), condensation
Water quality (hardness, sodium and dissolved oxygen, hydrogen conductivity, silica, sodium, iron, the content of copper and hydrogen in water after precision processing desalination
Conductivity), (silica, sweet-water tank water inlet conductivity, sweet-water tank water outlet conductivity, TOCi are (total for boiler feedwater quality
Organic carbon ion)), generator cooling-water quality (pH, conductivity, copper content, dissolved oxygen).Above-mentioned monitoring data have to comply with
The relevant regulations of 12145 exposure draft of GB/T announced in 2015 are then determined as no heavy corrosion such as monitoring data qualification
Fouling tendency.
If monitoring data are unqualified, i.e., monitoring data are exceeded, then enter and diagnose in next step.Whether investigate risk factors (7)
It is handled in time by tertiary treatment principle.When Water Vapor Quality deterioration, answer the representativeness of rapid censored sample, result of laboratory test it is accurate
Property, and in overall analysis system water, vapour quality variation, confirmation judge it is errorless after, by following tertiary treatment principle execution:
Coagulation: caused by having because of impurity a possibility that corrosion and scaling, salification, should restore in 72h to corresponding standard
Value.
Two stage treatment: caused by having certainly because of impurity a possibility that corrosion and scaling, salification, should restore interior for 24 hours to corresponding
Standard value.
Tertiary treatment: occurring fast erosion, fouling, salification, if water quality does not improve in 4h, answers blowing out.
In every level-one of abnormality processing, if cannot still restore normal before the deadline, it should use higher by one
The processing method of grade.It such as handles, then determines without heavy corrosion, fouling tendency, such as not according to three-level in time by tertiary treatment principle
Treatment principle is handled in time, then is determined as that corrosion and scaling tendency is serious.Since then, the corrosion and scaling under direct current cooker operating condition
Diagnosis of risk terminates.
Direct current cooker is stoppage in transit state
If direct current cooker is in stoppage in transit state, first investigate whether risk factors (8) use reasonable furnace stopping maintenance measure.Stop
Furnace safeguard measure mainly has wet Protection Code and dry Protection Code, and wet Protection Code is that will have protective water full of pot during blowing out
Furnace, to prevent air from entering boiler internal, when boiler down time is no more than seven days, using wet Protection Code than advantageous；It is dry
Protection Code is that the metal surface of boiler is made to keep drying, and to prevent boiler corrosion, the dry Protection Code generallyd use has oven drying method, does
Drying prescription method and nitrogen charging method, hot-water boiler down time are more than seven days with dry Protection Code (such as Desicdant method).Due to the work of oxygen corrosion
With in the equally long time, deactivated boiler is much more serious than damage caused by the boiler corrosion under operating status, institute
With, it is necessary to anti-corrosion measure appropriate is taken to deactivated boiler according to furnace outage time length, with the service life of prolonged boiler.If not yet
Have using reasonable protection of boiler during shutdown period measure, is then determined as that corrosion and scaling tendency is serious.
Reasonable protection of boiler during shutdown period measure is such as used, then enters and diagnoses in next step, investigates whether risk factors (9) are closed
The water of reason, which rinses, (to carry out cold conditions flushing to boiler first, then carries out hot flushing to boiler；Simultaneously, it is ensured that water quality reaches
Standard requirements, especially iron concentration, when boiler water quality reaches it is claimed below when, can terminate to rinse: Fe < 100ppb；DO
< 10ppb；SiO20.5 μ S/cm of < 30ppb, conductivity <.), it is subsequent as reasonable without carrying out especially with wet Protection Code
Water rinse just operation boiler, will greatly affect water and steam quality, be then determined as that corrosion and scaling tendency is serious, such as carried out rationally
Water rinse, then boiler can operate normally, according to boiler operatiopn diagnosis route carry out corrosion and scaling tendency judgement.
Claims (10)
1. a kind of diagnostic method of direct current cooker corrosion and scaling risk, it is characterised in that: the following steps are included:
When direct current cooker is operating status, diagnostic method are as follows:
1) investigate direct current cooker water supply system whether cupric, except condenser；If cupric, direct current cooker do not use water supply system
Water purification mode should be all-volatile treatment mode；If water supply system cupric, the Water purification mode that direct current cooker uses is answered
For reproducibility all-volatile treatment mode；This requirement is not met, then is determined as that boiler corrosion, fouling tendency are serious；
2) above-mentioned water process mode meets the requirements, then enters and diagnose in next step；Whether complete investigate direct current cooker chemical instruments, if
Chemical instruments are not complete, then are determined as that boiler corrosion, fouling tendency are serious；
3) above-mentioned chemical instruments are complete, then enter and diagnose in next step；Whether investigation direct current cooker medicine machine and instrument have can
By property and availability, if medicine machine and instrument do not have reliabilty and availability, it is determined as that boiler corrosion, fouling tendency are tight
Weight；
4) above-mentioned direct current cooker medicine machine and instrument meet the requirements, then enter and diagnose in next step；Investigate whether monitoring data accord with
The regulation for closing 12145 exposure draft of GB/T that 2015 announce then is determined as no heavy corrosion knot such as monitoring data qualification
Dirt tendency；
If 5) above-mentioned monitoring data are undesirable, enter and diagnose in next step；It investigates and whether locates in time by tertiary treatment principle
Reason is not handled according to tertiary treatment principle such as in time, then is determined as that corrosion and scaling tendency is serious；Since then, direct current cooker runs feelings
Corrosion and scaling diagnosis of risk under condition terminates；
When direct current cooker is stoppage in transit state, diagnostic method are as follows:
A) it first investigates whether using reasonable furnace stopping maintenance measure, i.e., when boiler down time is no more than seven days, using wet protection
Method；Down time is more than seven days using dry Protection Code；If protection of boiler during shutdown period measure is undesirable, it is determined as that corrosion and scaling inclines
To serious；
Whether b) above-mentioned protection of boiler during shutdown period measure meets the requirements, then enters and diagnose in next step, carry out reasonably before investigating boiler operatiopn
Water rinses, if not carrying out reasonable water rinses just operation boiler, is determined as that corrosion and scaling tendency is serious；
C) above-mentioned water flushing meets the requirements, then boiler can operate normally, when hence into above-mentioned direct current cooker being operating status
Diagnosis process.
2. diagnostic method according to claim 1, it is characterised in that: all-volatile treatment described in step 1) includes reproducibility
All-volatile treatment, oxidisability all-volatile treatment and oxygenated treatment.
3. diagnostic method according to claim 1, it is characterised in that: chemical instruments described in step 2) include that hand surveys instrument
And in-line meter.
4. diagnostic method according to claim 1, it is characterised in that: chemical instruments described in step 2) include conductivity
Instrument, pH meter, atomic absorption instrument, silicon table, sodium table, oxygen table, ion chromatograph, phosphate radical table, TOC instrument and highly sensitive hydrogen detection
Device.
5. diagnostic method according to claim 1, it is characterised in that: the reliability of step 3) medicine machine and instrument
Refer to availability: medicine machine and instrument are able to satisfy manual, the automatic running demand of power plant, and medicine machine can be controlled accurately
Dosage, instrument can accurately reflect the truth of water quality, and measurement error is small.
6. diagnostic method according to claim 1, it is characterised in that: the step 4) monitoring data are therrmodynamic system steam
The monitoring data of quality.
7. diagnostic method according to claim 5, it is characterised in that: the monitoring data packet of the therrmodynamic system water and steam quality
Include quality of steam, boiler feedwater quality, condensation water quality, boiler feedwater quality, generator cooling-water quality.
8. diagnostic method according to claim 7, it is characterised in that: the quality of steam index includes Na content, hydrogen electricity
Conductance, dioxide-containing silica, iron content and copper content；
The boiler feedwater quality index includes that the hardness of water supply, dissolved oxygen, iron content, copper content, sodium content, silica contain
Amount, hydrogen conductivity, pH value, hydrazine content, corrosivity anion and total content of organic carbon；
The condensed water quality index includes hardness, sodium content, dissolved oxygen content, hydrogen conductivity；And after precision processing desalination
Dioxide-containing silica, sodium content, iron content, corrosivity anion-content, copper content and hydrogen conductivity in water；
The boiler feedwater quality index includes that dioxide-containing silica, sweet-water tank water inlet conductivity, sweet-water tank go out water power
Conductance, TOCi content；And pH, conductivity, copper content and the dissolved oxygen of generator cooling-water.
9. diagnostic method according to claim 1, it is characterised in that: step 5) the tertiary treatment principle are as follows: work as steam
When quality deteriorates, representativeness, the accuracy of result of laboratory test of rapid censored sample, and water in overall analysis system, vapour quality
Variation, confirmation judge it is errorless after, by following tertiary treatment principle execution:
Coagulation: caused by having because of impurity a possibility that corrosion and scaling, salification, should restore in 72h to corresponding standard value；
Two stage treatment: caused by having certainly because of impurity a possibility that corrosion and scaling, salification, should restore interior for 24 hours to corresponding standard
Value；
Tertiary treatment: occurring fast erosion, fouling, salification, if water quality does not improve in 4h, answers blowing out；
In every level-one of abnormality processing, if cannot still restore normal before the deadline, it should use more higher leveled
Processing method.
10. diagnostic method according to claim 1, it is characterised in that: step b) the reasonable water rinses are as follows: right first
Boiler carries out cold conditions flushing, then carries out hot flushing to boiler；Simultaneously, it is ensured that water quality reaches standard requirements, works as boiler water
When matter reaches claimed below, it can terminate to rinse: Fe < 100ppb；DO < 10ppb；SiO20.5 μ S/ of < 30ppb, conductivity <
cm。
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| CN106653114B (en) * | 2016-12-08 | 2018-04-20 | 核动力运行研究所 | Nuclear power plant's foul drainage system pH value Indexes Abnormality diagnostic device and method |
| CN112598300A (en) * | 2020-12-25 | 2021-04-02 | 润电能源科学技术有限公司 | Method, device and system for determining salt deposition rate of steam turbine and storage medium |
| CN114527247B (en) * | 2021-12-20 | 2023-12-22 | 广州迪森数字能源科技有限公司 | Comprehensive boiler water quality monitoring method, system and equipment based on Internet of things |
| CN114660159B (en) * | 2022-03-21 | 2024-04-05 | 中国石油化工股份有限公司 | Method for slowing down corrosion of rectification system of vinyl acetate device |
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Effective date of registration: 20240604 Address after: 510663 No.9, Keke Road, Huangpu District, Guangzhou City, Guangdong Province Patentee after: Guangzhou Special Equipment Testing and Research Institute (Guangzhou Special Equipment Accident Investigation Technology Center Guangzhou Elevator Safety Operation Monitoring Center) Country or region after: China Address before: 510663 No.9, Keke Road, Science City, Huangpu District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU SPECIAL PRESSURE EQUIPMENT INSPECTION AND Research Institute Country or region before: China |