CN109668378A - A kind of high-tension switch gear gas tank drying method - Google Patents
A kind of high-tension switch gear gas tank drying method Download PDFInfo
- Publication number
- CN109668378A CN109668378A CN201811536403.2A CN201811536403A CN109668378A CN 109668378 A CN109668378 A CN 109668378A CN 201811536403 A CN201811536403 A CN 201811536403A CN 109668378 A CN109668378 A CN 109668378A
- Authority
- CN
- China
- Prior art keywords
- gas tank
- switch gear
- tension switch
- drying method
- fully welded
- Prior art date
- 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.)
- Pending
Links
- 238000001035 drying Methods 0.000 title claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 116
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 21
- 238000006073 displacement reaction Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000002808 molecular sieve Substances 0.000 claims description 17
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000001307 helium Substances 0.000 claims description 5
- 229910052734 helium Inorganic materials 0.000 claims description 5
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 5
- 229910052681 coesite Inorganic materials 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- 229910052906 cristobalite Inorganic materials 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 229910052682 stishovite Inorganic materials 0.000 claims description 4
- 229910052905 tridymite Inorganic materials 0.000 claims description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 229910018503 SF6 Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 2
- 229960000909 sulfur hexafluoride Drugs 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000011549 displacement method Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229940063781 nitrogen 99 % Drugs 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools, brushes, or analogous members
-
- B08B1/143—
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B7/00—Drying solid materials or objects by processes using a combination of processes not covered by a single one of groups F26B3/00 and F26B5/00
Abstract
The invention discloses a kind of high-tension switch gear gas tank drying methods, after gas tank is fully welded, carry out nitrogen displacement operation more than once to gas tank to remove steam.High-tension switch gear gas tank drying method of the invention has many advantages, such as that high-efficient and drying effect is good.
Description
Technical field
The invention mainly relates to high-tension apparatus technical fields, refer in particular to a kind of high-tension switch gear gas tank drying method.
Background technique
Micro-water content in inflatable high-voltage switchgear gas tank is distinctly claimed in national standard, it is desirable that is not greater than
150PPM, once it not only will affect the insulating capacity of the dielectric inside gas tank, but also dielectric because water content is high
It is possible that and water molecule reaction, especially with the switchgear of sulfur hexafluoride gas-insulating, sulfur hexafluoride gas meeting and hydrone
Chemical reaction occurs and generates deleterious acidic substance, the components inside switching devices have corrosiveness, therefore control height and press off
The micro-water content closed in equipment gas tank is very necessary.The method master for removing steam in degasification tank now in industry generally used is handle
It is that the gas tank not being fully welded is placed in drying shed 12~24 hours, moisture content is removed by dehumidifier, to which time is up later in gas
Be fully welded after suitable desiccant is placed in case, insulating gas directly just filled to gas tank pumping later, this method time-consuming compared with
More, efficiency is very low, and because the validity period of common dessicant is very short and poor ability of adsorbed water molecule, to insulating gas
Interior moisture content poor adsorption causes to be difficult to protect the micro-water content in high-tension switch gear gas tank to be less than 150PPM.Solve high pressure
Micro-water content in switchgear gas tank is the technical standard requirement of power switchgear, efficiently, reliably realizes high-voltage switch gear
Humble water content requires to be one of current technologic problem in equipment gas tank.
Summary of the invention
The technical problem to be solved in the present invention is that, for technical problem of the existing technology, the present invention provides one
The good high-tension switch gear gas tank drying method of the high-efficient and drying effect of kind.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A kind of high-tension switch gear gas tank drying method carries out more than once gas tank after gas tank is fully welded
Nitrogen displacement operation is to remove steam.
Preferably, the detailed process of the nitrogen displacement operation are as follows:
Nitrogen is filled in the gas tank of vacuum, and guarantees that pressure is 0.8 × 10 in gas tank5Pa~1.2 × 105Between Pa, then
Parked preset time；
By the gas extraction in gas tank, the vacuum degree in gas tank is made to reach 1.0 × 10-3Mpa or more.
Preferably, for the purity of the nitrogen 99% or more, micro-water content is less than 10PPM.
Preferably, before gas tank is fully welded, molecular sieve is placed in gas tank, for adsorbing steam.
Preferably, the molecular sieve uses 4A molecular sieve, SiO2/Al2O3Between 1~3, effective aperture is
Preferably, before gas tank is fully welded, in chronological sequence sequence successively carries out the cleaning of gas tank, dry roasting and drying.
Preferably, the cleaning operation of the gas tank specifically: with absolute alcohol to gas tank and loaded on zero inside gas tank
Part surface wipes and cleans.
Preferably, the dry roasting operation of the gas tank specifically: be placed in gas tank in the container that temperature is 60~80 DEG C, baking
Time 1~2 hour, and container top is constantly in exhaust condition.
Preferably, the drying operation of the gas tank specifically: gas tank is placed in the container of constant temperature and humidity, temperature 10
~30 DEG C, humidity is less than 30%.
Preferably, it is fully welded between nitrogen displacement operation, gas tank is vacuumized and helium leak test operation in gas tank.
Compared with the prior art, the advantages of the present invention are as follows:
High-tension switch gear gas tank drying method of the invention removes steam using the method for nitrogen displacement, than normal
Going steam method (such as dehumidifier) for rule, more efficient, removal steam is more thoroughly, it can be achieved that micro-water content in high-voltage switch gear gas tank
Less than 50PPM, guarantee the electrical safety of high-tension switch gear.
High-tension switch gear gas tank drying method of the invention places molecule before gas tank is fully welded in gas tank
Sieve, for adsorbing steam.It is more preferable to the suction-operated of steam due to replacing common dessicant using molecular sieve, and duration
It is long.
High-tension switch gear gas tank drying method of the invention, what is be easier in the case where not increasing too many cost incites somebody to action
The micro-water content of gas tank inner components removes, and makes to meet the code requirement that micro-water content is less than 150PPM inside gas tank.
Detailed description of the invention
Fig. 1 is flow chart of the method for the present invention.
Specific embodiment
Below in conjunction with Figure of description and specific embodiment, the invention will be further described.
As shown in Figure 1, the high-tension switch gear gas tank drying method of the present embodiment, after gas tank is fully welded, to gas
Case carries out nitrogen displacement operation more than once；Specifically, the detailed process of single nitrogen displacement operation are as follows: be filled with nitrogen very
In empty gas tank, and guarantee that pressure is 0.8 × 10 in gas tank5Pa~1.2 × 105Between Pa, then parked preset time；By gas tank
Interior gas extraction, makes the vacuum degree in gas tank reach 1.0 × 10-3Mpa or more.The number of nitrogen displacement operation can be according to reality
Situation is selected, and is preferably 1~2 time.High-tension switch gear gas tank drying method of the invention, using nitrogen displacement
Method removes steam, goes steam method (such as dehumidifier) than conventional, more efficient, and removal steam is more thoroughly, it can be achieved that high pressure
It switchs micro-water content in gas tank and is less than 50PPM, fully ensure that the electrical safety of high-tension switch gear.
In the present embodiment, before gas tank is fully welded, molecular sieve is placed in gas tank, for adsorbing steam.Divide due to using
Son sieve replaces common dessicant, more preferable to the suction-operated of steam, and duration is long.Specifically, molecular sieve selects 4A molecule
Sieve, silica alumina ratio SiO2/Al2O3≈ 2, effective aperture is aboutIn addition, it is 1 that molecular sieve, which places quantity and the PRESSURE-VOLUME RELATION of gas tank,
Cubic meter puts 1 kilogram of molecular sieve, proportional placement.
In the present embodiment, before gas tank is fully welded, in chronological sequence sequence successively carries out the cleaning of gas tank, dry roasting and drying
Deng.
It elaborates below with reference to a complete specific embodiment to method of the invention:
As shown in Figure 1, cleaning: being wiped and cleaned with absolute alcohol to gas tank and loaded on internal component surface；
Assembly: each components are installed in gas tank, and gas tank is assembled；
It is dry roasting: gas tank to be placed in the baking oven that temperature is 60~80 DEG C, baking time 1~2 hour, need to set at the top of baking oven
Have exhaust fan continuous work (temperature must not the too high components that can make inside gas tank deform, temperature is too low, and aqueous vapor can not toasted
Come)；
It is dry: gas tank being placed in drying shed, constant temperature and humidity must be kept in drying shed, temperature control is for 20 DEG C (10
Selected between~30 DEG C), humid control is less than 30%, further goes to institute of each component of degasification tank (including inner components) itself
The steam contained；
Place molecular sieve: molecular sieve selects 4A molecular sieve, silica alumina ratio SiO2/Al2O3≈ 2, effective aperture is aboutMolecule
Sieve placement quantity and the PRESSURE-VOLUME RELATION of gas tank are 1 cubic metre and put 1 kilogram of molecular sieve, proportional placement；
It is fully welded: gas tank being carried out to be fully welded operation, and is completed placing in 4 hours after molecular sieve, to avoid molecular sieve suction
Receive extraneous steam；
Vacuumize and helium leak check operation: gas tank vacuumized and helium leak check operation (such as helium leak check system is examined
Leakage)；
Nitrogen displacement: by 99% or more purity requirement, nitrogen of the micro-water content less than 10PPM is filled with gas tank, displacement time
Number 1~2 time, specific movement is that first the raw-gas of gas tank lining is extracted out by vacuum pump, guarantees that the vacuum degree of gas tank reaches
1.0×10-3Mpa or more is filled with above-mentioned nitrogen in gas tank by equipment later, guarantees pressure 1.0 × 105Pa or so stops
Set 3~nitrogen is extracted out by vacuum pump after five minutes, guarantee that the vacuum degree of gas tank reaches 1.0 × 10-3Mpa or more；
It fills insulating gas: after nitrogen displacement, insulating gas (such as SF is filled with into gas tank6), the entire processing of gas tank
Process is completed；Wherein insulating gas micro-water content requires to be less than 10PPM, and institute's pressurising power is depending on technical requirements.
High-tension switch gear gas tank drying method of the invention, what is be easier in the case where not increasing too many cost incites somebody to action
The micro-water content of gas tank inner components removes, and makes to meet the code requirement that micro-water content is less than 150PPM inside gas tank.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention should be regarded as protection of the invention
Range.
Claims (10)
1. a kind of high-tension switch gear gas tank drying method, which is characterized in that after gas tank is fully welded, carry out one to gas tank
The secondary above nitrogen displacement operation is to remove steam.
2. high-tension switch gear gas tank drying method according to claim 1, which is characterized in that the nitrogen displacement
The detailed process of operation are as follows:
Nitrogen is filled in the gas tank of vacuum, and guarantees that pressure is 0.8 × 10 in gas tank5Pa~1.2 × 105Between Pa, then it is parked
Preset time；
By the gas extraction in gas tank, the vacuum degree in gas tank is made to reach 1.0 × 10-3Mpa or more.
3. high-tension switch gear gas tank drying method according to claim 2, which is characterized in that the nitrogen it is pure
For degree 99% or more, micro-water content is less than 10PPM.
4. high-tension switch gear gas tank drying method according to claim 1 or 2 or 3, which is characterized in that in gas tank
Before being fully welded, molecular sieve is placed in gas tank, for adsorbing steam.
5. high-tension switch gear gas tank drying method according to claim 4, which is characterized in that the molecular sieve is adopted
With 4A molecular sieve, SiO2/Al2O3Between 1~3, effective aperture is
6. high-tension switch gear gas tank drying method according to claim 1 or 2 or 3, which is characterized in that in gas tank
Before being fully welded, in chronological sequence sequence successively carries out the cleaning of gas tank, dry roasting and drying.
7. high-tension switch gear gas tank drying method according to claim 6, which is characterized in that the gas tank it is clear
Clean operation specifically: wiped and cleaned with absolute alcohol to gas tank and loaded on the component surface inside gas tank.
8. high-tension switch gear gas tank drying method according to claim 6, which is characterized in that the gas tank it is dry
Roasting operation specifically: be placed in gas tank in the container that temperature is 60~80 DEG C, baking time 1~2 hour, and container top is always
In exhaust condition.
9. high-tension switch gear gas tank drying method according to claim 6, which is characterized in that the gas tank is done
Dry operation specifically: gas tank is placed in the container of constant temperature and humidity, temperature is 10~30 DEG C, and humidity is less than 30%.
10. high-tension switch gear gas tank drying method according to claim 1, which is characterized in that be fully welded in gas tank
Between nitrogen displacement operation, gas tank is vacuumized and helium leak test operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811536403.2A CN109668378A (en) | 2018-12-14 | 2018-12-14 | A kind of high-tension switch gear gas tank drying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811536403.2A CN109668378A (en) | 2018-12-14 | 2018-12-14 | A kind of high-tension switch gear gas tank drying method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109668378A true CN109668378A (en) | 2019-04-23 |
Family
ID=66144850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811536403.2A Pending CN109668378A (en) | 2018-12-14 | 2018-12-14 | A kind of high-tension switch gear gas tank drying method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072616A (en) * | 2011-02-15 | 2011-05-25 | 江苏南大光电材料股份有限公司 | Device for drying clean vessel |
| CN203116443U (en) * | 2013-02-07 | 2013-08-07 | 深圳市沃特玛电池有限公司 | Drying device for lithium iron battery cell |
| CN203642611U (en) * | 2013-11-07 | 2014-06-11 | 东莞市创明电池技术有限公司 | Lithium-ion battery drying oven |
| CN104048481A (en) * | 2014-06-16 | 2014-09-17 | 广东电网公司电力科学研究院 | Vacuum drying method of electrical equipment |
| CN206420262U (en) * | 2017-01-03 | 2017-08-18 | 潍坊天泽新能源有限公司 | A kind of lithium battery electric core drying box |
-
2018
- 2018-12-14 CN CN201811536403.2A patent/CN109668378A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072616A (en) * | 2011-02-15 | 2011-05-25 | 江苏南大光电材料股份有限公司 | Device for drying clean vessel |
| CN203116443U (en) * | 2013-02-07 | 2013-08-07 | 深圳市沃特玛电池有限公司 | Drying device for lithium iron battery cell |
| CN203642611U (en) * | 2013-11-07 | 2014-06-11 | 东莞市创明电池技术有限公司 | Lithium-ion battery drying oven |
| CN104048481A (en) * | 2014-06-16 | 2014-09-17 | 广东电网公司电力科学研究院 | Vacuum drying method of electrical equipment |
| CN206420262U (en) * | 2017-01-03 | 2017-08-18 | 潍坊天泽新能源有限公司 | A kind of lithium battery electric core drying box |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190423 |
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| RJ01 | Rejection of invention patent application after publication |