CN106093293A - A kind of detection method of sulfur hexafluoride gas acid decomposition substrate concentration - Google Patents
A kind of detection method of sulfur hexafluoride gas acid decomposition substrate concentration Download PDFInfo
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- CN106093293A CN106093293A CN201610670427.1A CN201610670427A CN106093293A CN 106093293 A CN106093293 A CN 106093293A CN 201610670427 A CN201610670427 A CN 201610670427A CN 106093293 A CN106093293 A CN 106093293A
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Abstract
The detection method of a kind of sulfur hexafluoride gas acid decomposition substrate concentration, including filling the electrical equipment (1) of sulfur hexafluoride gas, GSV (2), uncontrollable gas flowmeter (3), sulfur hexafluoride gas analyte oxidation unit (4), the conical flask (5) sealed, base buret (6), burette fixed support (7).Described detection method is the acidic liquid after sulfur hexafluoride decomposition gas is dissolved in demineralized water, obtains sulfur hexafluoride gas acid decomposition substrate concentration after being converted by standard alkali-titration, is different from the chemical sensor of routine, color comparison tube detection.The detection method of this patent can be used for the mass concentration of acid decomposition thing, the total amount of equipment inner acidic analyte calculating in sulfur hexafluoride electrical equipment.The health status in sulfur hexafluoride electrical equipment can be analyzed by the detection method of this patent, thus judge whether equipment can continue to run with, it is ensured that power grid security.
Description
Technical field
Patent of the present invention relates to the detection method of a kind of sulfur hexafluoride gas acid decomposition substrate concentration, belongs to transformer station's detection skill
Art field.
Technical background
Along with Cubicle Gas-Insulated Switchgear (GIS), sulfur hexafluoride breaker increasing, sulfur hexafluoride gas
The consumption of body is the most increasing.Sulfur hexafluoride gas can produce analyte in the case of apparatus overheat, electric discharge, electric arc, decomposes
Analyte detection decomposes product as one of common approach of health status during gas insulated high voltage electric equipment operation, sulfur hexafluoride
Thing not only can affect the dielectric strength of equipment, causes unplanned power failure, and atmospheric environment also will produce bigger pollution, threatens fortune
The safety of dimension personnel.Therefore, sulfur hexafluoride gas decomposition product detection work is extremely important.
Power industry, for the sulfur hexafluoride gas power equipment in transformer station, mainly uses color comparison tube detection side
Method, is compared by the color of the solution colour after chemical reaction with standard solution, thus obtains sulfur hexafluoride gas substantially
Body acid decomposition substrate concentration, utilized the development of sulfur hexafluoride gas electrochemical properties in recent years and the sensor method that formed is setting
Under standby charged, power-off condition, sulfur hexafluoride equipment can be carried out the detection of gaseous acidic analyte concentration, detect easier,
But analyte is unstable, cause degree of accuracy the highest.Current detection method is all difficult to the gas to sulfur hexafluoride electrical equipment
Body acid decomposition substrate concentration accurately quantitative determines.
Based on above-mentioned condition, the detection method of a kind of sulfur hexafluoride gas acid decomposition substrate concentration can solve this well
Problem, can be dissolved in the acidic liquid after demineralized water by this detection method, by standard alkali liquor by sulfur hexafluoride decomposition gas
Obtain sulfur hexafluoride gas acid decomposition substrate concentration after titration conversion, be different from the chemical sensor of routine, color comparison tube detection.
Summary of the invention
It is an object of the invention to, in order to calculate the mass concentration of the acid decomposition thing in sulfur hexafluoride electrical equipment and total
Amount, so that it is determined that whether equipment can safe operation.The present invention discloses the detection of a kind of sulfur hexafluoride gas acid decomposition substrate concentration
Method.
The technical scheme is that, the detection method of a kind of sulfur hexafluoride gas acid decomposition substrate concentration, detection is required
Instrument and equipment include filling the electrical equipment of sulfur hexafluoride gas, GSV, uncontrollable gas flowmeter, lithium
Sulfur gas analyte oxidation unit, the conical flask of sealing, base buret, burette fixed support and split-second timer.Fill hexafluoro
The electrical equipment changing sulfur gas connects uncontrollable gas flowmeter by GSV；Gas flowmeter connects lithium
Sulfur gas analyte oxidation unit；The sulfur hexafluoride gas analyte oxidation unit conical flask by sealing for tubing joints；Alkali formula
Burette is arranged on burette 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 described detection method, by standard alkali-titration
Sulfur hexafluoride gas acid decomposition substrate concentration is obtained after conversion.This method is different from the chemical sensor method of routine, color comparison tube
Detection method.
In described detection method, described in fill the electrical equipment of sulfur hexafluoride gas, be to use sulfur hexafluoride gas to make absolutely
Edge and arc-extinguishing medium, GSV is non-return valve, prevents gas backflow from returning in equipment, sulfur hexafluoride gas analyte oxidation dress
Put and protosulphide can be oxidized to hydrolyzable stable sulfide (and sulfur hexafluoride gas itself is not oxidized, and does not dissolves in
Water), the demineralized water volume in gas flow, conical flask is all fixing.
Described detection method, can be used for calculating the mass concentration of the acid decomposition thing in sulfur hexafluoride electrical equipment and total
Amount, so that it is determined that whether equipment can safe operation.
When the detection method of sulfur hexafluoride gas acid decomposition substrate concentration is when on-the-spot, if sulfur hexafluoride gas electrically sets
Standby interior when there is apparatus overheat, electric discharge, electric arc, analyte can be produced.At this moment sample cock and effusion meter can be opened, and by dividing
Analyte is aoxidized (and sulfur hexafluoride gas itself is not oxidized, and water insoluble) by the oxidation unit solving thing, is then dissolved in removing
Saline, has titrated finally by standard alkali liquor.
The detection conversion method of a kind of sulfur hexafluoride gas acid decomposition substrate concentration sequentially includes the following steps:
(1) H after sulfur hexafluoride gas acid decomposition thing is dissolved in demineralized water+The calculating of molal quantity:
Sulfur hexafluoride gas acid decomposition thing presents acidity after being dissolved in demineralized water, it is assumed that for titrating the alkali liquor consumption of acid solution
Volume is V1, OH-Ion molar concentration is ρ1, then H after sulfur hexafluoride gas acid decomposition thing is dissolved in demineralized water+Molal quantity n1
For:
n1=ρ1V1…………………………………………………(1)
(2) sulfur hexafluoride gas acid decomposition thing mass concentration, the calculating of equipment inner acidic analyte total amount: owing to the present invention sets
There is special oxidation unit, the acid decomposition thing of low price sulfur has been oxidized to hydrolyzable high sulphide, and sulfur hexafluoride gas
Body itself is not oxidized, and water insoluble；The acidic materials H that high sulphide generates after being dissolved in water2SO4In H+Ion and S+6
Ion 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 sulfur hexafluoride gas acid decomposition thing takes throughput is Q, takes a length of T, then sulfur hexafluoride gas acid decomposition during gas
Thing take gas accumulated amount:
V2=QT………………………………………………(3)
If owing to sulfur hexafluoride gas acid decomposition owner exists with the compound of low price sulfur, wherein have a small amount of HF acid,
But this matter-pole is unstable, and content is little, then can obtain mass concentration c of the acid decomposition thing represented with element sulphur:
c=32n/V2... ... (4),
Wherein, 32 is the molal weight of sulphur atom；C is with S element representation；N is S atom molal quantity；In V is sulfur hexafluoride equipment
Filled volume.
(3) formula (1), (2), (3) are substituted into (4) and just can get the mass concentration of the acid decomposition thing represented with element sulphur
c:
c=16ρ1V1/(QT) …………………………………………(5)
Wherein, c is with S element representation；ρ1For OH-Ion molar concentration；V1For the alkali liquor consumption volume for titrating acid solution；
Q is that sulfur hexafluoride gas acid decomposition thing takes throughput；T is for taking gas duration.
Assume that the filled volume in sulfur hexafluoride equipment is V, then the equipment inner acidic analyte represented total with element sulphur
Amount is:
M=cV=16Vρ1V1/(QT) ……………………………………(6)
Wherein, M is with S element representation；C is the mass concentration of acid decomposition thing.
Just can calculate the mass concentration of acid decomposition thing in sulfur hexafluoride electrical equipment according to formula (5), (6), set
The total amount of standby inner acidic analyte.
Patent of the present invention provides the benefit that, patent of the present invention is for the detection of sulfur hexafluoride gas acid decomposition substrate concentration
Method, can have a power failure to the sulfur hexafluoride gas acid decomposition thing in equipment, live detection, can analyze sulfur hexafluoride electric
Health status in equipment, thus judge whether equipment can continue to run with, it is ensured that power grid security.
Patent of the present invention is applicable to, with sulfur hexafluoride for insulation and the electrical equipment of arc-extinguishing medium, to calculate sulfur hexafluoride electricity
The mass concentration of acid decomposition thing in gas equipment, the total amount of equipment inner acidic analyte.
Accompanying drawing explanation
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 flowmeter, 4
Be sulfur hexafluoride gas analyte oxidation unit, 5 be seal conical flask, 6 be base buret, 7 be burette fixed support.
Detailed description of the invention
Below in conjunction with embodiment and compare accompanying drawing the present invention is described in detail.
As it is shown in figure 1, the detection method of the present embodiment a kind of sulfur hexafluoride gas acid decomposition substrate concentration, including filling hexafluoro
Change the electrical equipment (1) of sulfur gas, GSV (2), uncontrollable gas flowmeter (3), sulfur hexafluoride gas decomposition
Thing oxidation unit (4), the conical flask (5) sealed, base buret (6), burette fixed support (7).
Sulfur hexafluoride gas is sampled valve (2) and is contained in the gas density relay of the electrical equipment (1) filling sulfur hexafluoride gas
At device, after GSV (2), it is mounted with a uncontrollable gas flowmeter (3), sulfur hexafluoride acid decomposition gas
All be oxidized to after sulfur hexafluoride gas analyte oxidation unit (4) hydrolyzable high price acid (and sulfur hexafluoride gas this
Body is not oxidized, and water insoluble), the acidic liquid after being dissolved in demineralized water in the conical flask (5) sealed, solid by burette
Base buret (6) that fixed rack (7) is fixing and pipe built with standard alkali liquor titrate, obtain lithium after titration conversion
Sulfur gaseous acidic analyte mass concentration, the total amount of equipment inner acidic analyte.
Claims (4)
1. the detection method of a sulfur hexafluoride gas acid decomposition substrate concentration, it is characterised in that described detection method is by six
Sulfur fluoride decomposition gas is dissolved in the acidic liquid after demineralized water, obtains sulfur hexafluoride gas acid by standard alkali-titration after being converted
Property analyte concentration；
Described titration conversion sequentially includes the following steps:
(1) H after sulfur hexafluoride gas acid decomposition thing is dissolved in demineralized water+The calculating of molal quantity:
Sulfur hexafluoride gas acid decomposition thing presents acidity after being dissolved in demineralized water, it is assumed that for titrating the alkali liquor consumption of acid solution
Volume is V1, OH-Ion molar concentration is ρ1, then H after sulfur hexafluoride gas acid decomposition thing is dissolved in demineralized water+Molal quantity n1
For:
n1=ρ1V1
(2) sulfur hexafluoride gas acid decomposition thing mass concentration, the calculating of equipment inner acidic analyte total amount: owing to the present invention sets
There is special oxidation unit, the acid decomposition thing of low price sulfur has been oxidized to hydrolyzable high sulphide, and sulfur hexafluoride gas
Body itself is not oxidized, and water insoluble；The acidic materials H that high sulphide generates after being dissolved in water2SO4In H+Ion and S+6
Ion 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 sulfur hexafluoride gas acid decomposition thing takes throughput is Q, takes a length of T, then sulfur hexafluoride gas acid decomposition during gas
Thing take gas accumulated amount
V2=QT
If owing to sulfur hexafluoride gas acid decomposition owner exists with the compound of low price sulfur, wherein have a small amount of HF acid,
But this matter-pole is unstable, and content is little, then can obtain mass concentration c of the acid decomposition thing represented with element sulphur:
c=32n/V2
Wherein, 32 is the molal weight of sulphur atom；C is with S element representation；N is S atom molal quantity；In V is sulfur hexafluoride equipment
Filled volume;
(3) by n1, n, V substitute into c=32n/V2Mass concentration c of the available acid decomposition thing represented with element sulphur:
c=16ρ1V1/(QT)；
Wherein, c is with S element representation；ρ1For OH-Ion molar concentration；V1For the alkali liquor consumption volume for titrating acid solution；
Q is that sulfur hexafluoride gas acid decomposition thing takes throughput；T is for taking gas duration；
(4) total amount of the equipment inner acidic analyte represented with element sulphur is:
M=cV=16Vρ1V1/(QT)
Wherein, M is with S element representation；C is the mass concentration of acid decomposition thing.
2. according to the detection method of a kind of sulfur hexafluoride gas acid decomposition substrate concentration, it is characterised in that described detection method is adopted
Instrument and equipment include filling the electrical equipment of sulfur hexafluoride gas, GSV, uncontrollable gas flowmeter, hexafluoro
Change sulfur gas analyte oxidation unit, the conical flask of sealing and demineralized water, base buret and burette fixed support；Fill hexafluoro
The electrical equipment changing sulfur gas connects uncontrollable gas flowmeter by GSV；Gas flowmeter connects lithium
Sulfur gas analyte oxidation unit；The sulfur hexafluoride gas analyte oxidation unit conical flask by sealing for tubing joints；Alkali formula
Burette is arranged on burette fixed support, and base buret stretches into the conical flask of sealing.
The detection method of a kind of sulfur hexafluoride gas acid decomposition substrate concentration, it is characterised in that institute
Stating the electrical equipment filling sulfur hexafluoride gas, be to use sulfur hexafluoride gas to insulate and arc-extinguishing medium, GSV is inverse
Only valve, prevents gas backflow from returning in equipment, and protosulphide can be oxidized to hydrolyzable by sulfur hexafluoride gas analyte oxidation unit
Stable sulfide, the demineralized water volume in gas flow, conical flask is all fixing.
The detection method of a kind of sulfur hexafluoride gas acid decomposition substrate concentration the most according to claim 1, it is characterised in that
Described detection method can be used for calculating mass concentration and the total amount of the acid decomposition thing in sulfur hexafluoride electrical equipment, so that it is determined that
Whether equipment can safe operation.
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| 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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| 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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