CN106093293B - A kind of detection method of sulfur hexafluoride gas decomposition in acid thing concentration - Google Patents
A kind of detection method of sulfur hexafluoride gas decomposition in acid thing concentration Download PDFInfo
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- CN106093293B CN106093293B CN201610670427.1A CN201610670427A CN106093293B CN 106093293 B CN106093293 B CN 106093293B CN 201610670427 A CN201610670427 A CN 201610670427A CN 106093293 B CN106093293 B CN 106093293B
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- Prior art keywords
- sulfur hexafluoride
- decomposition
- hexafluoride gas
- gas
- acid thing
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- 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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- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 89
- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 88
- 239000002253 acid Substances 0.000 title claims abstract description 68
- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 64
- 238000001514 detection method Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000012491 analyte Substances 0.000 claims abstract description 20
- 230000003647 oxidation Effects 0.000 claims abstract description 14
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 14
- 230000002378 acidificating effect Effects 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000004448 titration Methods 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 15
- 239000005864 Sulphur Substances 0.000 claims description 13
- 239000003513 alkali Substances 0.000 claims description 8
- 239000002585 base Substances 0.000 claims description 8
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 150000002500 ions Chemical class 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 125000004434 sulfur atom Chemical group 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000010612 desalination reaction Methods 0.000 claims description 2
- 230000003862 health status Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 4
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 description 3
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
Abstract
A kind of detection method of sulfur hexafluoride gas decomposition in acid thing concentration, including fill the electrical equipment of sulfur hexafluoride gas（1）, GSV（2）, uncontrollable gas flowmeter（3）, sulfur hexafluoride gas analyte oxidation unit（4）, sealing conical flask（5）, base buret（6）, buret fixed support（7）.The detection method is that sulfur hexafluoride decomposition gas is dissolved in the acidic liquid after demineralized water, and sulfur hexafluoride gas decomposition in acid thing concentration is obtained after being converted by standard alkali-titration, is different from conventional chemical sensor, colorimetric cylinder detection.The detection method of this patent can be used for calculating the mass concentration of decomposition in acid thing in sulfur hexafluoride electrical equipment, in equipment decomposition in acid thing total amount.The health status in sulfur hexafluoride electrical equipment can be analyzed with the detection method of the patent, so as to judge whether equipment can continue to run with, ensure that power grid security.
Description
Technical field
Patent of the present invention is related to a kind of detection method of sulfur hexafluoride gas decomposition in acid thing concentration, category transformer station detection skill
Art field.
Technical background
With Cubicle Gas-Insulated Switchgear（GIS）, sulfur hexafluoride breaker increasing, sulfur hexafluoride gas
The dosage of body is also increasing.Sulfur hexafluoride gas can produce analyte in the case of apparatus overheat, electric discharge, electric arc, decompose
One of the common approach of analyte detection as health status during gas insulated high voltage electric equipment operation, sulfur hexafluoride decompose production
Thing can not only influence the dielectric strength of equipment, cause unplanned power failure, and larger pollution will be also produced to atmospheric environment, threaten fortune
The safety of dimension personnel.Therefore, sulfur hexafluoride gas decomposition product detection work is extremely important.
Power industry is directed to the sulfur hexafluoride gas power equipment in transformer station, and early stage mainly uses colorimetric cylinder detection side
Method, it is compared by the solution colour after chemical reaction with the color of standard liquid, so as to obtain sulfur hexafluoride gas substantially
Body decomposition in acid thing concentration, the sensor method for being developed and being formed using sulfur hexafluoride gas electrochemical properties in recent years are being set
Under standby powered, power-off condition, the detection of gaseous acidic analyte concentration can be carried out to sulfur hexafluoride equipment, detection is easier,
But analyte is unstable, cause accuracy also less high.Current detection method is all difficult the gas to sulfur hexafluoride electrical equipment
Body decomposition in acid thing concentration is accurately quantitative determined.
Based on above-mentioned condition, a kind of detection method of sulfur hexafluoride gas decomposition in acid thing concentration can solve this well
Problem, the acidic liquid that can be dissolved in sulfur hexafluoride decomposition gas by the detection method after demineralized water, passes through standard alkali lye
Sulfur hexafluoride gas decomposition in acid thing concentration is obtained after titration conversion, is different from conventional chemical sensor, colorimetric cylinder detection.
The content of the invention
The object of the present invention is in order to calculate the mass concentration of the decomposition in acid thing in sulfur hexafluoride electrical equipment and total
Amount, so that it is determined that whether equipment can safe operation.The present invention discloses a kind of detection of sulfur hexafluoride gas decomposition in acid thing concentration
Method.
The technical scheme is that a kind of detection method of sulfur hexafluoride gas decomposition in acid thing concentration, needed for detection
Instrument and equipment include filling the electrical equipment of sulfur hexafluoride gas, GSV, uncontrollable gas flowmeter, lithium
Sulphur gas analyte oxidation unit, conical flask, base buret, buret fixed support and the split-second timer of sealing.Fill hexafluoro
The electrical equipment for changing sulphur gas connects uncontrollable gas flowmeter by GSV；Gas flowmeter connection is lithium
Sulphur gas analyte oxidation unit；The conical flask that sulfur hexafluoride gas analyte oxidation unit passes through sealing for tubing joints；Alkali formula
Buret is arranged on buret fixed support, and base buret stretches into the conical flask of sealing.
Sulfur hexafluoride decomposition gas is dissolved in the acidic liquid after demineralized water by the detection method, passes through standard alkali-titration
Sulfur hexafluoride gas decomposition in acid thing concentration is obtained after conversion.This method is different from conventional chemical sensor method, colorimetric cylinder
Detection method.
The electrical equipment for filling sulfur hexafluoride gas, made absolutely using sulfur hexafluoride gas in described detection method
Edge and arc-extinguishing medium, GSV are non-return valve, prevent gas backflow from returning in equipment, sulfur hexafluoride gas analyte oxidation dress
Protosulphide can be oxidized to hydrolyzable stable sulfide by putting（And sulfur hexafluoride gas itself is not oxidized, and do not dissolve in
Water）, the desalination water volume in gas flow, conical flask is all fixed.
Described detection method, available for the mass concentration for calculating the decomposition in acid thing in sulfur hexafluoride electrical equipment and always
Amount, so that it is determined that whether equipment can safe operation.
When the detection method of sulfur hexafluoride gas decomposition in acid thing concentration is used for live, if sulfur hexafluoride gas is electrically set
It is standby interior when apparatus overheat, electric discharge, electric arc be present, analyte can be produced.At this moment sample cock and flowmeter can be opened, and by dividing
The oxidation unit of solution thing aoxidizes analyte（And sulfur hexafluoride gas itself is not oxidized, and it is not soluble in water）, it is then dissolved in removing
Salt solution, completed finally by standard alkali lye to titrate.
A kind of detection conversion method of sulfur hexafluoride gas decomposition in acid thing concentration is carried out according to the following steps：
（1）Sulfur hexafluoride gas decomposition in acid thing is dissolved in the H after demineralized water+The calculating of molal quantity：
Acidity is presented after being dissolved in demineralized water in sulfur hexafluoride gas decomposition in acid thing, it is assumed that for titrating the alkali lye of acid solution
Consumption volume is V1, OH-Ion molar concentration is ρ1, then sulfur hexafluoride gas decomposition in acid thing be dissolved in the H after demineralized water+Mole
Number n1For:
n1=ρ1V1…………………………………………………(1)
（2）The calculating of decomposition in acid thing total amount in sulfur hexafluoride gas decomposition in acid amount of substance concentration, equipment：Due to this hair
It is bright to be provided with special oxidation unit, the decomposition in acid thing of low price sulphur has been oxidized to hydrolyzable high sulphide, and it is lithium
Sulphur gas itself is not oxidized and not soluble in water；High sulphide is dissolved in the acidic materials H generated after water2SO4In H+Ion
With S+6Ion ratio is 2：1, and not oxidized remaining H2H in S+Ion and S-2Ion ratio is also
2：1, i.e. S atom molal quantity:
n=n1/2………………………………………………(2)
Assuming that it is Q that sulfur hexafluoride gas decomposition in acid thing, which takes throughput, a length of T when taking gas, then sulfur hexafluoride gas is acid
Analyte takes gas accumulated amount：
V2=QT………………………………………………(3)
Because if sulfur hexafluoride gas decomposition in acid owner is with the compound presence of low price sulphur, wherein having a small amount of HF
Acid, but the material is extremely unstable, and content is seldom, then can obtain the mass concentration c of decomposition in acid thing represented with element sulphur:
c=32n/V2... ... (4),
Wherein, 32 be sulphur atom molal weight；C is with S element representations；N is S atom molal quantity；V sets for sulfur hexafluoride
Standby interior filled volume.
（3）By formula (1),（2）、（3）Substitute into（4）The just mass concentration of the available decomposition in acid thing represented with element sulphur
c:
c=16ρ1V1/(QT) …………………………………………(5)
Wherein, c is with S element representations；ρ1For OH-Ion molar concentration；V1For the alkali lye consumption for titrating acid solution
Volume；Q is that sulfur hexafluoride gas decomposition in acid thing takes throughput；T is to take gas duration.
Assuming that the filled volume in sulfur hexafluoride equipment is V, then decomposition in acid thing is total in the equipment that is represented with element sulphur
Measure and be：
M=cV=16Vρ1V1/(QT) ……………………………………(6)
Wherein, M is with S element representations；C is the mass concentration of decomposition in acid thing.
According to formula（5）、（6）Can calculates the mass concentration of the decomposition in acid thing in sulfur hexafluoride electrical equipment, set
The total amount of standby interior decomposition in acid thing.
The beneficial effect of patent of the present invention is that patent of the present invention is used for the detection of sulfur hexafluoride gas decomposition in acid thing concentration
Method, the sulfur hexafluoride gas decomposition in acid thing in equipment can be had a power failure, live detection, it is electric sulfur hexafluoride can be analyzed
Health status in equipment, so as to judge whether equipment can continue to run with, it ensure that power grid security.
Patent of the present invention is applied to that, using sulfur hexafluoride as insulation and the electrical equipment of arc-extinguishing medium, sulfur hexafluoride electricity can be calculated
The total amount of decomposition in acid thing in the mass concentration of decomposition in acid thing in gas equipment, equipment.
Brief description of the drawings
Fig. 1 is the system schematic of patent of the present invention；
In figure：1 be fill the electrical equipment of sulfur hexafluoride gas, 2 be GSV, 3 be uncontrollable gas flow
Meter, 4 be sulfur hexafluoride gas analyte oxidation unit, 5 be the conical flask of sealing, 6 be base buret, 7 be that buret is fixed
Support.
Embodiment
With reference to embodiments and compare accompanying drawing the present invention is described in detail.
As shown in figure 1, a kind of detection method of sulfur hexafluoride gas decomposition in acid thing concentration of the present embodiment, including fill hexafluoro
Change the electrical equipment of sulphur gas（1）, GSV（2）, uncontrollable gas flowmeter（3）, sulfur hexafluoride gas decompose
Thing oxidation unit（4）, sealing conical flask（5）, base buret（6）, buret fixed support（7）.
By sulfur hexafluoride gas sampling valve（2）Mounted in the electrical equipment for filling sulfur hexafluoride gas（1）Gas density relay
At device, GSV（2）A uncontrollable gas flowmeter is mounted with afterwards（3）, sulfur hexafluoride decomposition in acid gas
By sulfur hexafluoride gas analyte oxidation unit（4）Hydrolyzable high price acid is oxidized to afterwards（And sulfur hexafluoride gas sheet
Body is not oxidized, and not soluble in water）, in the conical flask of sealing（5）The acidic liquid being inside dissolved in after demineralized water, is consolidated by buret
Fixed rack（7）Fixed base buret（6）And pipe built with standard alkali lye titrated, titration conversion after obtain it is lithium
The total amount of decomposition in acid thing in sulphur gaseous acidic analyte mass concentration, equipment.
Claims (4)
1. a kind of detection method of sulfur hexafluoride gas decomposition in acid thing concentration, it is characterised in that the detection method is by six
Sulfur fluoride decomposition gas is dissolved in the acidic liquid after demineralized water, and sulfur hexafluoride gas acid is obtained after being converted by standard alkali-titration
Property analyte concentration；
The titration conversion is carried out according to the following steps：
(1) sulfur hexafluoride gas decomposition in acid thing is dissolved in the H after demineralized water+The calculating of molal quantity：
Acidity is presented after being dissolved in demineralized water in sulfur hexafluoride gas decomposition in acid thing, it is assumed that for titrating the alkali lye consumption of acid solution
Volume is V1, OH-Ion molar concentration is ρ1, then sulfur hexafluoride gas decomposition in acid thing be dissolved in the H after demineralized water+Molal quantity n1
For:
n1=ρ1V1
(2) sulfur hexafluoride gas decomposition in acid amount of substance concentration, in equipment decomposition in acid thing total amount calculating：Filled by aoxidizing
Put, the decomposition in acid thing of low price sulphur has been oxidized to hydrolyzable high sulphide, and sulfur hexafluoride gas itself is not oxidized,
It is and not soluble in water；High sulphide is dissolved in the acidic materials H generated after water2SO4In H+Ion and S+6Ion ratio is
2：1, and not oxidized remaining H2H in S+Ion and S-2Ion ratio is also 2：1, i.e. S atom molal quantity:
N=n1/2
Assuming that it is Q that sulfur hexafluoride gas decomposition in acid thing, which takes throughput, a length of T when taking gas, then sulfur hexafluoride gas decomposition in acid
Thing takes gas accumulated amount
V2=QT
Because if sulfur hexafluoride gas decomposition in acid owner is with the compound presence of low price sulphur, wherein a small amount of HF acid is had,
But the material is extremely unstable, and content is seldom, then the mass concentration c of decomposition in acid thing represented with element sulphur can be obtained:
C=32n/V2
Wherein, 32 be sulphur atom molal weight；C is with S element representations；N is S atom molal quantity；
(3) by n1、n、V2Substitute into c=32n/V2The mass concentration c of the available decomposition in acid thing represented with element sulphur:
C=16 ρ1V1/(QT)；
Wherein, c is with S element representations；ρ1For OH-Ion molar concentration；V1For the alkali lye consumption volume for titrating acid solution；Q
Throughput is taken for sulfur hexafluoride gas decomposition in acid thing；T is to take gas duration；
(4) using the total amount of decomposition in acid thing in the equipment that element sulphur represents as：
M=cV=16V ρ1V1/(QT)
Wherein, M is with S element representations；C is the mass concentration of decomposition in acid thing；V is the filled volume in sulfur hexafluoride equipment.
A kind of 2. detection method of sulfur hexafluoride gas decomposition in acid thing concentration according to claim 1, it is characterised in that
The instrument and equipment that the detection method uses includes filling the electrical equipment of sulfur hexafluoride gas, GSV, uncontrollable
Gas flowmeter, sulfur hexafluoride gas analyte oxidation unit, the conical flask and demineralized water of sealing, base buret and buret
Fixed support；The electrical equipment for filling sulfur hexafluoride gas connects uncontrollable gas flowmeter by GSV；Gas
Flowmeter connects sulfur hexafluoride gas analyte oxidation unit；Sulfur hexafluoride gas analyte oxidation unit is connected close by pipeline
The conical flask of envelope；Base buret is arranged on buret fixed support, and base buret stretches into the conical flask of sealing.
A kind of 3. detection method of sulfur hexafluoride gas decomposition in acid thing concentration according to claim 2, it is characterised in that institute
The electrical equipment for filling sulfur hexafluoride gas is stated, is to be insulated using sulfur hexafluoride gas and arc-extinguishing medium, GSV is inverse
Only valve, prevent gas backflow from returning in equipment, protosulphide can be oxidized to hydrolyzable by sulfur hexafluoride gas analyte oxidation unit
Stable sulfide, the desalination water volume in gas flow, conical flask is all fixed.
A kind of 4. detection method of sulfur hexafluoride gas decomposition in acid thing concentration according to claim 1, it is characterised in that
The detection method can be used for the mass concentration and total amount for calculating the decomposition in acid thing in sulfur hexafluoride electrical equipment, so that it is determined that
Whether equipment can safe operation.
Priority Applications (1)
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| CN107561209A (en) * | 2017-08-03 | 2018-01-09 | 国网安徽省电力公司电力科学研究院 | Sulfur hexafluoride gas acidity detection method and device |
| CN107576755A (en) * | 2017-08-03 | 2018-01-12 | 国网安徽省电力公司电力科学研究院 | Sulfur hexafluoride gas acidity detection method |
| CN111123044A (en) * | 2019-11-25 | 2020-05-08 | 国网江西省电力有限公司电力科学研究院 | SF (sulfur hexafluoride)6Method and device for judging GIS release amount by concentration of acidic decomposition product |
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| CA2504092A1 (en) * | 2004-04-14 | 2005-10-14 | Powertech Labs Inc. | Method and device for the detection of sf6 decomposition products |
| CN102967685A (en) * | 2012-11-09 | 2013-03-13 | 青海电力科学试验研究院 | Method for judging titration end point in acidity test of sulfur hexafluoride (SF6) gas |
| CN104792365B (en) * | 2015-04-21 | 2017-03-08 | 国家电网公司 | The detecting device integrated and method in sulfur hexafluoride gas quality scene |
| CN104807963B (en) * | 2015-04-21 | 2016-08-17 | 国家电网公司 | A kind of sulfur hexafluoride gas acidity detection device and method |
| CN104792939B (en) * | 2015-04-21 | 2016-07-06 | 国家电网公司 | Sulfur hexafluoride gas acidity and hydrolyzable content of fluoride integrated detection method |
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