CN114857492A - Sectional type pressurization and continuous storage SF 6 On-site gas recovery device - Google Patents
Sectional type pressurization and continuous storage SF 6 On-site gas recovery device Download PDFInfo
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- CN114857492A CN114857492A CN202210410059.2A CN202210410059A CN114857492A CN 114857492 A CN114857492 A CN 114857492A CN 202210410059 A CN202210410059 A CN 202210410059A CN 114857492 A CN114857492 A CN 114857492A
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- 238000011084 recovery Methods 0.000 title claims abstract description 104
- 238000003860 storage Methods 0.000 title claims abstract description 72
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 238000009413 insulation Methods 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims description 265
- 238000004140 cleaning Methods 0.000 claims description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000004064 recycling Methods 0.000 claims description 10
- 101100064324 Arabidopsis thaliana DTX48 gene Proteins 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 6
- 229910018503 SF6 Inorganic materials 0.000 claims description 5
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 5
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 5
- 239000000284 extract Substances 0.000 claims description 3
- 239000000110 cooling liquid Substances 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 193
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/065—Arrangements for producing propulsion of gases or vapours
- F17D1/07—Arrangements for producing propulsion of gases or vapours by compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/082—Pipe-line systems for liquids or viscous products for cold fluids, e.g. liquefied gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
- F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
- F17C2225/0107—Single phase
- F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0157—Compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0337—Heat exchange with the fluid by cooling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
Abstract
Sectional type pressurization and continuous storage SF 6 A gas on-site recovery device, belonging to the SF of transformer substation 6 The technical field of recovery, which solves the problem of low recovery efficiency of the existing device; synchronous recovery of multiple SF's using pre-stage converging line 6 SF in gas chamber of gas insulated apparatus 6 A gas; a graded pressurizing quick recovery pipeline is adopted according to the SF of the air chamber 6 Pressure differential of gas, staged SF against the chamber 6 Gas (es)The pressurized recovery is carried out, so that the recovery speed is improved; for residual SF in the pipeline after the operation is finished 6 The gas is recycled, so that the pollution to the environment is avoided; cooling the pressurized SF through a liquefaction line 6 The gas is liquefied by two-stage cooling to make SF 6 The gas is completely liquefied, so that the storage is convenient; liquid SF is subjected to liquid SF through a post-stage confluence storage pipeline 6 Continuous collection and storage are carried out, so that frequent starting and stopping of equipment are avoided; the invention greatly improves the SF in ultrahigh pressure and extra-high voltage 6 SF in projects of fault maintenance, extension and the like of gas insulation equipment and totally-enclosed combined electrical apparatus 6 Efficiency of gas recovery.
Description
Technical Field
The invention belongs to the field of transformer substation SF 6 The technical field of recovery relates to a sectional pressurized and continuously stored SF 6 A gas on-site recovery device.
Background
With the rapid development of the global energy Internet, a large amount of SF 6 The gas insulation equipment is generally used in ultrahigh voltage, extra-high voltage and fully-closed combined electrical appliances. SF 6 Obvious greenhouse effect, is one of six greenhouse gases clearly indicated in the Kyoto protocol of climate Change framework convention of United nations, so that the greenhouse effect is mainly applied to SF 6 The gas is recycled, treated and reused, and the environmental protection requirement is met.
The invention discloses a method and a system for recovering and purifying sulfur hexafluoride gas, and aims at solving the problems of low recovery rate and recovery purity and large liquid nitrogen consumption in the prior art in Chinese patent application with application publication number of CN113803960A and application publication date of 2021, 12 and 17.
At present, the number of the current day,in situ SF 6 In the process of recovery operation, in order to improve the recovery efficiency, a recovery device SF is added 6 The air displacement of the compressor is expensive, the whole volume is large, long-distance transportation is inconvenient and the operation is complicated on one hand, and on the other hand, the compressor is subjected to SF 6 The self-sealing joint of the insulating equipment and the longer conveying pipeline have certain acceleration effect at the initial stage of the recovery operation, but the effect played at the middle and later stages is not ideal.
For SF 6 In the field recovery operation, a transport vehicle is usually adopted to transport a recovery device and a storage container to an operation field for collection and storage, but the number of peripheral live devices of the operation field is large, the device and the storage container are difficult to hoist to the position near an air chamber to be recovered, meanwhile, half-pressure reduction treatment needs to be carried out on an adjacent air chamber during recovery of a certain air chamber, and conventionally used SF (sulfur hexafluoride) is used 6 The recovery method can not work simultaneously in a plurality of portable air chambers, seriously influences the timeliness of recovery work, and needs a large amount of gas recovery work for fault maintenance and extension projects of ultrahigh-voltage and extra-high-voltage electrical equipment and fully-closed combined electrical appliances, and the recovery progress relates to whether the project is completed on time, whether a power failure plan is changed and the like.
For ultra-high voltage and extra-high voltage SF 6 Gas insulation equipment and totally-enclosed combined electrical apparatus, in the projects of troubleshooting, extension and the like, because of their SF 6 The gas in the gas chamber is huge, the existing storage device cannot continuously and completely collect and store the gas at one time, and the recovery equipment needs to be started and stopped frequently during on-site recovery operation, so that SF (sulfur hexafluoride) is caused 6 The recovery work is extremely inconvenient, and the potential safety hazard is increased.
Disclosure of Invention
The invention aims to design SF with sectional pressurization and continuous storage 6 A gas on-site recovery device, which aims to solve the problem that the prior device can not synchronously and continuously recover a plurality of SF 6 SF in gas chamber of gas insulated apparatus 6 Gas, thereby causing a problem of low recovery efficiency.
The invention solves the technical problems through the following technical scheme:
in order to achieve the purpose, the invention adopts the technical scheme that:
sectional type pressurization and continuous storage SF 6 An on-site gas recovery device comprising: the system comprises a preceding-stage confluence pipeline, a staged pressurization quick recovery pipeline, a cooling liquefaction pipeline, a rear-stage confluence storage pipeline and a plurality of storage tanks; the input end of the preceding stage confluence pipeline and a plurality of SFs 6 The gas chamber of the gas insulation equipment is hermetically connected, the output end of the preceding-stage confluence pipeline is hermetically connected with the input end of the staged pressurization rapid recovery pipeline, the output end of the staged pressurization rapid recovery pipeline is hermetically connected with the input end of the cooling liquefaction pipeline, the output end of the cooling liquefaction pipeline is hermetically connected with the input end of the rear-stage confluence storage pipeline, and the output end of the rear-stage confluence storage pipeline is hermetically connected with the storage tanks; the preceding stage confluence pipeline is used for synchronously recycling multiple SF 6 SF in gas chamber of gas insulated apparatus 6 A gas; the graded pressurizing quick recovery pipeline is used for recovering the SF 6 SF of gas cell of gas insulation apparatus 6 Gas pressure differential, SF staging to chamber 6 Pressurizing and recovering the gas, and after the operation is finished, carrying out residual liquid and gaseous SF in the pipeline 6 Recovering; the cooling liquefaction pipeline is used for pressurizing SF 6 Carrying out two-stage cooling liquefaction on the gas; the post-stage confluence storage pipeline is used for liquid SF 6 To be collected and stored continuously.
SF according to the invention 6 Gas on-site recovery device for synchronously recovering multiple SF by adopting preceding-stage confluence pipeline 6 SF in gas chamber of gas insulated apparatus 6 Gas, realizing SF in a plurality of gas chambers 6 Synchronously recycling gas; by means of stepped pressurizing fast recovering pipeline according to SF 6 SF of gas cell of gas insulation apparatus 6 Pressure differential of gas, staged SF against the chamber 6 The gas is pressurized and recovered, so that the recovery speed is improved, the safety of equipment is guaranteed, and the electric energy is saved; after the operation is finished, the residual liquid and gas SF in the pipeline 6 The recovery is carried out, the pollution to the environment is avoided, and simultaneously, the residual liquid SF in the pipeline is prevented 6 Gasification, pressure damage to pipelines; by coolingBut the liquefied pipeline is used for liquefying the pressurized SF 6 The gas is liquefied by two-stage cooling to make SF 6 The gas is completely liquefied, so that the storage is convenient; liquid SF is subjected to liquid SF through a post-stage confluence storage pipeline 6 The continuous collection and storage of the SF data, avoids the frequent start-up and shutdown of the equipment during the on-site recovery operation, and greatly improves the SF data in ultrahigh voltage and extra-high voltage 6 SF in projects of fault maintenance, extension and the like of gas insulation equipment and totally-enclosed combined electrical apparatus 6 Efficiency of gas recovery.
Further, the foreline includes: a plurality of communicating pipes and a first confluence device HLQ1, wherein the first confluence device HLQ1 is a multi-input and single-output confluence device, and the input ends of the communicating pipes correspond to the SF pipes 6 The gas chambers of the gas insulation equipment are hermetically connected, and the output ends of a plurality of the communication pipelines are correspondingly hermetically connected with a plurality of input ends of the first confluence device HLQ 1; the output end of the first confluence device HLQ1 is hermetically connected with the input end of the staged pressurization quick recovery pipeline; each communicating pipeline is provided with a valve and a pressure sensor.
Further, the staged pressurization fast recovery pipeline comprises: a first self-sealing joint ZF1, a first manual valve S1, a fourth electromagnetic valve V4, a fourth pressure sensor P4, a pressure stabilizing filter GLQ, a first safety valve SV1, a sixth electromagnetic valve V6, an electromagnetic valve DV1, a vacuum compressor ZKJ, an electromagnetic valve DV2, a first SF 6 Gas compressor QTJ1, second SF 6 A gas compressor QTJ2, a fifth pressure sensor P5, a sixth pressure sensor P6, a ninth electromagnetic valve V9, a tenth electromagnetic valve V10, a second safety valve SV2, an eleventh electromagnetic valve V11, a twelfth electromagnetic valve V12, a second manual valve S2, a second self-sealing joint ZF2, a seventh pressure sensor P7, a residual gas collection tank SJG, a fifth electromagnetic valve V5, a seventh electromagnetic valve V7, a third self-sealing joint ZF3, and an eighth electromagnetic valve V8;
first self-sealing joint ZF1 and first manual valve S1 'S one end sealing connection, first manual valve S1' S the other end and the one end sealing connection of fourth solenoid valve V4, and the other end and the input sealing connection of steady voltage filter GLQ of fourth solenoid valve V4, steady voltage filterThe output end of the GLQ is hermetically connected with one end of a sixth electromagnetic valve V6, and the other end of the sixth electromagnetic valve V6 is connected with the first SF 6 Input end of gas compressor QTJ1 is hermetically connected, first SF 6 The output end of the gas compressor QTJ1 is hermetically connected with one end of a ninth electromagnetic valve V9, the other end of the ninth electromagnetic valve V9 is hermetically connected with one end of an eleventh electromagnetic valve V11, the other end of the eleventh electromagnetic valve V11 is hermetically connected with one end of a second manual valve S2, the other end of the second manual valve S2 is hermetically connected with a second self-sealing joint ZF2, one end of an electromagnetic valve DV1 is hermetically connected between a voltage stabilizing filter GLQ and a sixth electromagnetic valve V6, the other end of the electromagnetic valve DV1 is hermetically connected with the input end of a vacuum compressor ZKJ, the output end of the vacuum compressor ZKJ is hermetically connected with one end of an electromagnetic valve DV2, and the other end of the electromagnetic valve DV2 is hermetically connected with the sixth electromagnetic valve V6 and the first electromagnetic valve SF 6 6 On the conduit between the gas compressors QTJ 1; second SF 6 The input end of the gas compressor QTJ2 is hermetically connected with the sixth electromagnetic valve V6 and the first SF 6 On the line between the gas compressors QTJ1, second SF 6 The output end of the gas compressor QTJ2 is hermetically connected with one end of a tenth solenoid valve V10, the other end of the tenth solenoid valve V10 is hermetically connected to a pipeline between a ninth solenoid valve V9 and an eleventh solenoid valve V11, and a sixth pressure sensor P6 is hermetically installed on the second SF 6 On a pipeline between a gas compressor QTJ2 and a tenth electromagnetic valve V10, one end of a fifth electromagnetic valve V5 is hermetically connected between a first manual valve S1 and a fourth electromagnetic valve V4, the other end of the fifth electromagnetic valve V5 is hermetically connected with a third self-sealing joint ZF3, one end of a seventh electromagnetic valve V7 is hermetically connected on a pipeline between a fourth electromagnetic valve V4 and a pressure stabilizing filter GLQ, the other end of the seventh electromagnetic valve V7 is hermetically connected with an output end of a residual gas collection tank SJG, one end of a twelfth electromagnetic valve V12 is hermetically connected at an input end of a residual gas collection tank SJG, the other end of a twelfth electromagnetic valve V12 is hermetically connected on a pipeline between a ninth electromagnetic valve V9 and an eleventh electromagnetic valve V11, and a seventh pressure sensor P7 is hermetically installed at the top of the residual gas collection tank SJG; a fourth pressure sensor P4 is hermetically arranged on a pipeline between the fourth electromagnetic valve V4 and the pressure stabilizing filter GLQ, and a first safety valve SV1 is hermetically arranged on the pressure stabilizing filter GLQ and a sixth electromagnetic valveOn the pipe between the valves V6, a fifth pressure sensor P5 is sealingly mounted in the first SF 6 On the pipeline between the gas compressor QTJ1 and the ninth solenoid valve V9, a second safety valve SV2 is hermetically installed on the pipeline between the ninth solenoid valve V9 and the eleventh solenoid valve V11, one end of an eighth solenoid valve V8 is hermetically connected between the first manual valve S1 and the fourth solenoid valve V4, the other end of the eighth solenoid valve V8 is hermetically connected between the eleventh solenoid valve V11 and the second manual valve S2, and the output ends of the first self-sealing joint ZF1 and the first confluence device HLQ1 are hermetically connected by a high-pressure bellows.
Further, the cooling liquefaction pipeline comprises: an eleventh self-sealing joint ZF11, an air heat exchanger KQH, a plate heat exchanger BH and a twelfth self-sealing joint ZF 12; the latter stage confluence storage pipe comprises: a thirteenth self-sealing joint ZF13, a second confluence device HLQ2, a thirteenth solenoid valve V13, a fourteenth solenoid valve V14, a fifteenth solenoid valve V15, an eighth pressure sensor P8, a ninth pressure sensor P9, a tenth pressure sensor P10, a fourteenth self-sealing joint ZF14, a fifteenth self-sealing joint ZF15, a sixteenth self-sealing joint ZF 16; the eleventh self-sealing joint ZF11 and the second self-sealing joint ZF2 are in sealing connection through a high-pressure corrugated pipe, the eleventh self-sealing joint ZF11 is in sealing connection with the input end of the air heat exchanger KQH, the output end of the air heat exchanger KQH is in sealing connection with the input end of the plate heat exchanger BH, the output end of the plate heat exchanger BH is in sealing connection with the twelfth self-sealing joint ZF12, and the twelfth self-sealing joint ZF12 and the thirteenth self-sealing joint ZF13 are in sealing connection through a high-pressure corrugated pipe; a first output end of the second confluence device HLQ2 is in sealing connection with one end of a thirteenth solenoid valve V13, the other end of the thirteenth solenoid valve V13 is in sealing connection with a fourteenth self-sealing joint ZF14, the fourteenth self-sealing joint ZF14 is in sealing connection with a storage tank, and an eighth pressure sensor P8 is in sealing connection with a pipeline between the thirteenth solenoid valve V13 and the fourteenth self-sealing joint ZF 14; a second output end of the second confluence device HLQ2 is connected with one end of a fourteenth solenoid valve V14 in a sealing manner, the other end of the fourteenth solenoid valve V14 is connected with a fifteenth self-sealing joint ZF15 in a sealing manner, the fifteenth self-sealing joint ZF15 is connected with a storage tank in a sealing manner, and a ninth pressure sensor P9 is installed on a pipeline between the fourteenth solenoid valve V14 and the fifteenth self-sealing joint ZF15 in a sealing manner; the third output end of the second confluence device HLQ2 is connected with one end of a fifteenth electromagnetic valve V15 in a sealing manner, the other end of the fifteenth electromagnetic valve V15 is connected with a sixteenth self-sealing joint ZF16 in a sealing manner, the sixteenth self-sealing joint ZF16 is connected with a storage tank in a sealing manner, and a tenth pressure sensor P10 is installed on a pipeline between the fifteenth electromagnetic valve V15 and the sixteenth self-sealing joint ZF16 in a sealing manner.
Further, the storage tank includes: a seventeenth self-sealing joint ZF17, an eighteenth self-sealing joint ZF18, a sixth manual valve S6, an eleventh pressure sensor P11, a third safety valve SV3, a seventh manual valve S7, a tank body (10), a draft tube (11), a bracket (12), a sewage outlet (13), a weight sensor (14) and a flat car (15); the tank body (10) is arranged on the support (12), the tank body (10) and the support (12) are placed on the flat car (15), and the weight sensor (14) is arranged between the upper surface of the flat car (15) and the bottom of the support (12); the flow guide pipe (11) is vertically arranged inside the tank body (10), the input end of the flow guide pipe (11) is arranged at the top of the tank body (10) and is in sealed communication with the output end of the sixth manual valve S6 through a pipeline, the output end of the flow guide pipe extends to the bottom of the tank body (10), the input end of the sixth manual valve S6 is in sealed connection with a seventeenth self-sealing joint ZF17 through a pipeline, and the eleventh pressure sensor P11 is mounted on the pipeline of the output end of the sixth manual valve S6 in a sealed manner; a sewage draining outlet (13) is arranged at the bottom of the tank body (10); the third safety valve SV3 is hermetically arranged at the top of the tank body (10), the input end of a seventh manual valve S7 is hermetically connected with the top of the tank body (10) through a pipeline, and the output end of a seventh manual valve S7 is hermetically connected with an eighteenth self-sealing joint ZF18 through a pipeline; and the seventeenth self-sealing joint ZF17 is taken as the input end of the storage tank and is in sealing connection with the output end of the second confluence device HLQ 2.
Further, before the device is used, the pipeline is vacuumized and self-cleaned, and the method comprises the following steps:
1) pre-stage confluence pipeline vacuumizing self-cleaning
The fourth self-sealing joint ZF4 and the seventh self-sealing joint ZF7 are in sealing connection by adopting a high-pressure corrugated pipe, the fifth self-sealing joint ZF5 and the eighth self-sealing joint ZF8 are in sealing connection by adopting a high-pressure corrugated pipe, the sixth self-sealing joint ZF6 and the ninth self-sealing joint ZF9 are in sealing connection by adopting a high-pressure corrugated pipe, the tenth self-sealing joint ZF10 and the first self-sealing joint ZF1 are in sealing connection by adopting a high-pressure corrugated pipe, a vacuumizing device is hermetically connected at the third self-sealing joint ZF3, the first manual valve S1, the first electromagnetic valve V1, the second electromagnetic valve V2, the third electromagnetic valve V3 and the fifth electromagnetic valve V5 are opened, the vacuumizing device is started, vacuumizing the preceding-stage confluence pipeline, closing the vacuumizing device when the vacuum degree meets the requirement, closing a first manual valve S1, a first electromagnetic valve V1, a second electromagnetic valve V2, a third electromagnetic valve V3 and a fifth electromagnetic valve V5, and finishing vacuumizing and self-cleaning of the preceding-stage confluence pipeline;
2) vacuum pumping self-cleaning of graded pressurizing quick recovery pipeline
Connecting a vacuumizing device at a third self-sealing joint ZF3 in a sealing manner, opening a fourth electromagnetic valve V4, a fifth electromagnetic valve V5, a sixth electromagnetic valve V6, an eighth electromagnetic valve V8, a ninth electromagnetic valve V9, a tenth electromagnetic valve V10, an eleventh electromagnetic valve V11, a twelfth electromagnetic valve V12, an electromagnetic valve DV1 and an electromagnetic valve DV2, starting the vacuumizing device, vacuumizing the graded pressurization fast recovery pipeline, closing the vacuumizing device when the vacuum degree meets the requirement, closing a fourth electromagnetic valve V4, a fifth electromagnetic valve V5, a sixth electromagnetic valve V6, an eighth electromagnetic valve V8, a ninth electromagnetic valve V9, a tenth electromagnetic valve V10, an eleventh electromagnetic valve V11, a twelfth electromagnetic valve V12, an electromagnetic valve DV1 and an electromagnetic valve DV2, and finishing self-cleaning of the graded pressurization fast recovery pipeline;
3) vacuumizing self-cleaning device for cooling liquefaction pipeline and post-stage confluence storage pipeline
The twelfth self-sealing joint ZF12 and the thirteenth self-sealing joint ZF13 are in sealing connection through a high-pressure corrugated pipe, the second self-sealing joint ZF2 and the eleventh self-sealing joint ZF11 are in sealing connection through a high-pressure corrugated pipe, a vacuumizing device is in sealing connection with the third self-sealing joint ZF3, a second manual valve S2, a fifth electromagnetic valve V5 and an eighth electromagnetic valve V8 are opened, the vacuumizing device is started, a cooling liquefaction pipeline and a rear-stage confluence storage pipeline are vacuumized, when the vacuum degree meets the requirement, the vacuumizing device is closed, and the second manual valve S2, the fifth electromagnetic valve V5 and the eighth electromagnetic valve V8 are closed.
Further, said is according to SF 6 SF of gas cell of gas insulation apparatus 6 Pressure differential of gas, staged SF against the chamber 6 The flow of pressurizing and recovering the gas is as follows:
the first manual valve S1 and the fourth electromagnetic valve V4 are opened, and the fourth pressure sensor P4 is used for measuring the pressure at the output end of the foreline, and is divided into three operation modes according to the measured pressure level:
1) positive pressure high recovery mode: when P4 is greater than or equal to the first threshold, the first SF is started simultaneously 6 Gas compressor QTJ1, second SF 6 Gas compressor QTJ2 for co-pumping SF 6 SF in gas chamber of gas insulated apparatus 6 A gas;
2) positive pressure low recovery mode: when P4 is less than the first threshold and greater than or equal to the second threshold, only the first SF is started 6 Gas compressor QTJ1 or second SF 6 One of the gas compressors QTJ2 extracts SF 6 SF in gas chamber of gas insulated apparatus 6 A gas;
3) a negative pressure recovery mode: when P4 is less than the second threshold, the sixth manual valve S6 is closed, solenoid valves DV1 and DV2 are opened, vacuum compressor ZKJ is started, and first SF is started 6 Gas compressor QTJ1 or second SF 6 Gas compressor QTJ2 for SF 6 And vacuumizing the gas chamber of the gas insulation equipment.
Further, the residual liquid and gaseous SF in the pipeline after the operation is finished 6 The recovery procedure was as follows: SF 6 After all the collection and storage are finished, a first solenoid valve V1, a second solenoid valve V2, a third solenoid valve V3, a first manual valve S1, a fourth solenoid valve V4, a sixth solenoid valve V6, an eighth solenoid valve V8, a ninth solenoid valve V9, a twelfth solenoid valve V12 and a second manual valve S2 are opened, and the first SF valve is opened 6 A gas compressor QTJ1 for residual SF in each pipeline 6 Recovering gas and residual SF 6 The gas enters a residual gas collecting tank SJG for storage through a twelfth electromagnetic valve V12, and the residual SF is stored 6 Gas (es)After recovery, the first SF is shut down 6 A gas compressor QTJ1 and various valves; in the positive pressure low recovery mode, the seventh electromagnetic valve V7 is opened to realize the SF in the residual gas collecting tank SJG 6 And (4) recovering the gas.
Further, the pressurized SF is 6 The flow of the gas for two-stage temperature reduction and liquefaction is as follows: SF (sulfur hexafluoride) recycled by pressurizing in a graded pressurizing and rapid recycling pipeline 6 The gas is sent into a KQH of an air heat exchanger for first cooling, and then is cooled for the second time through a plate heat exchanger (11) to ensure that SF is cooled for the first time 6 The gas is completely liquefied.
Further, the liquid SF 6 The procedure of continuous collection and storage of (1) is as follows: cooling liquid SF output by liquefaction pipeline 6 The thirteenth electromagnetic valve V13 is opened by the input from the input terminal of the second confluence device HLQ2, and the liquid SF is input to the first tank 6 When the first tank is full, the fourteenth solenoid valve V14 is opened to supply liquid SF to the second tank 6 At this time, the first tank is replaced, and when the second tank is full, the fifteenth solenoid valve V15 is opened to supply liquid SF to the third tank 6 At the moment, the second storage tank is replaced, and the continuous cycle operation is carried out in sequence until all the liquid SF is collected 6 Until now.
The invention has the advantages that:
SF according to the invention 6 Gas on-site recovery device for synchronously recovering multiple SF by adopting preceding-stage confluence pipeline 6 SF in gas chamber of gas insulated apparatus 6 Gas, realizing SF in a plurality of gas chambers 6 Synchronously recycling gas; by means of stepped pressurizing fast recovering pipeline according to SF 6 SF of gas chamber of gas insulation apparatus 6 Pressure differential of gas, staged SF against the chamber 6 The gas is pressurized and recovered, so that the recovery speed is improved, the safety of equipment is guaranteed, and electric energy is saved; after the operation is finished, the residual liquid and gas SF in the pipeline 6 The recovery is carried out, the pollution to the environment is avoided, and simultaneously, the residual liquid SF in the pipeline is prevented 6 Gasification, pressure damage to pipelines; after pressurization by cooling the liquefaction lineSF 6 The gas is liquefied by two-stage cooling to make SF 6 The gas is completely liquefied, so that the storage is convenient; liquid SF is subjected to liquid SF through a post-stage confluence storage pipeline 6 The continuous collection and storage of the SF data, avoids the frequent start-up and shutdown of the equipment during the on-site recovery operation, and greatly improves the SF data in ultrahigh voltage and extra-high voltage 6 SF in projects of fault maintenance, extension and the like of gas insulation equipment and totally-enclosed combined electrical apparatus 6 Efficiency of gas recovery.
Drawings
FIG. 1 is a structural view of a foreline of a recovery apparatus according to a first embodiment of the present invention;
FIG. 2 is a structural diagram of a staged pressurization rapid recycling pipeline of the recycling apparatus according to the first embodiment of the present invention;
fig. 3 is a structural diagram of a cooling liquefaction pipeline and a post-stage confluence storage pipeline of a recovery device according to a first embodiment of the present invention;
fig. 4 is a structural view of a storage tank of the recovery apparatus according to the first embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme of the invention is further described by combining the drawings and the specific embodiments in the specification:
example one
As shown in fig. 1 to 4, a sectional pressurized, continuously stored SF 6 An on-site gas recovery device comprising: the system comprises a preceding-stage confluence pipeline, a staged pressurization quick recovery pipeline, a cooling liquefaction pipeline and a rear-stage confluence storage pipeline.
As shown in fig. 1, the foreline includes: first SF 6 Gas-insulated apparatus, secondSF 6 Gas-insulated apparatus, third SF 6 The gas insulation device comprises a gas insulation device, a third manual valve S3, a fourth manual valve S4, a fifth manual valve S5, a fourth self-sealing joint ZF4, a fifth self-sealing joint ZF5, a sixth self-sealing joint ZF6, a seventh self-sealing joint ZF7, an eighth self-sealing joint ZF8, a ninth self-sealing joint ZF9, a first pressure sensor P1, a second pressure sensor P2, a third pressure sensor P3, a first electromagnetic valve V1, a second electromagnetic valve V2, a third electromagnetic valve V3, a first confluence device HLQ1 and a tenth self-sealing joint ZF 10;
first SF 6 The output end of the gas insulation equipment is hermetically connected with one end of a third manual valve S3 through a pipeline, the other end of the third manual valve S3 is hermetically connected with a fourth self-sealing joint ZF4 through a pipeline, the fourth self-sealing joint ZF4 is hermetically connected with a seventh self-sealing joint ZF7 through a high-pressure corrugated pipe, one end of a first electromagnetic valve V1 is hermetically connected with the seventh self-sealing joint ZF7 through a pipeline, the other end of the first electromagnetic valve V1 is hermetically connected with a first input end of a first confluence device HLQ1, and a first pressure sensor P1 is hermetically installed on a pipeline between the first electromagnetic valve V1 and the seventh self-sealing joint ZF 7; second SF 6 The output end of the gas insulation equipment is connected with one end of a fourth manual valve S4 in a sealing mode through a pipeline, the other end of the fourth manual valve S4 is connected with a fifth self-sealing joint ZF5 in a sealing mode through a pipeline, the fifth self-sealing joint ZF5 is connected with an eighth self-sealing joint ZF8 in a sealing mode through a high-pressure corrugated pipe, one end of a second electromagnetic valve V2 is connected with the eighth self-sealing joint ZF8 in a sealing mode through a pipeline, the other end of the second electromagnetic valve V2 is connected with a second input end of a first confluence device HLQ1 in a sealing mode, and a second pressure sensor P2 is installed on the pipeline between the second electromagnetic valve V2 and the eighth self-sealing joint ZF8 in a sealing mode; third SF 6 The output end of the gas insulation equipment is connected with one end of a fifth manual valve S5 in a sealing mode through a pipeline, the other end of the fifth manual valve S5 is connected with a sixth self-sealing joint ZF6 in a sealing mode through a pipeline, the sixth self-sealing joint ZF6 is connected with a ninth self-sealing joint ZF9 in a sealing mode through a high-pressure corrugated pipe, one end of a third electromagnetic valve V3 is connected with the ninth self-sealing joint ZF9 in a sealing mode through a pipeline, the other end of the third electromagnetic valve V3 is connected with a third input end of a first confluence device HLQ1 in a sealing mode, and the third electromagnetic valve V3 is connected with a third input end of the first confluence device HLQ1 in a sealing modeThe pressure sensor P3 is hermetically mounted on the pipe between the third solenoid valve V3 and the ninth self-sealing junction ZF 9.
As shown in fig. 2, the staged pressurization fast recovery pipeline includes: a first self-sealing joint ZF1, a first manual valve S1, a fourth electromagnetic valve V4, a fourth pressure sensor P4, a pressure stabilizing filter GLQ, a first safety valve SV1, a sixth electromagnetic valve V6, an electromagnetic valve DV1, a vacuum compressor ZKJ, an electromagnetic valve DV2, a first SF 6 Gas compressor QTJ1, second SF 6 A gas compressor QTJ2, a fifth pressure sensor P5, a sixth pressure sensor P6, a ninth electromagnetic valve V9, a tenth electromagnetic valve V10, a second safety valve SV2, an eleventh electromagnetic valve V11, a twelfth electromagnetic valve V12, a second manual valve S2, a second self-sealing joint ZF2, a seventh pressure sensor P7, a residual gas collection tank SJG, a fifth electromagnetic valve V5, a seventh electromagnetic valve V7, a third self-sealing joint ZF3, and an eighth electromagnetic valve V8;
first self-sealing joint ZF1 passes through pipe seal connection with the one end of first manual valve S1, pipe seal connection is passed through with the one end of fourth solenoid valve V4 to the other end of first manual valve S1, pipe seal connection is passed through with the one end of fourth solenoid valve V4 to the other end of fourth solenoid valve V4, pipe seal connection is passed through with steady voltage filter GLQ 'S input to the other end of steady voltage filter GLQ, pipe seal connection is passed through with the one end of sixth solenoid valve V6 to steady voltage filter GLQ' S output, the other end and the first SF of sixth solenoid valve V6 are passed through to the other end of sixth solenoid valve V6 6 The input end of the gas compressor QTJ1 is hermetically connected by a pipe seal, the first SF 6 The output end of the gas compressor QTJ1 is hermetically connected with one end of a ninth electromagnetic valve V9 through a pipeline, the other end of the ninth electromagnetic valve V9 is hermetically connected with one end of an eleventh electromagnetic valve V11 through a pipeline, the other end of the eleventh electromagnetic valve V11 is hermetically connected with one end of a second manual valve S2 through a pipeline, the other end of the second manual valve S2 is hermetically connected with a second self-sealing joint ZF2 through a pipeline, one end of an electromagnetic valve DV1 is hermetically connected between a voltage stabilizing filter GLQ and a sixth electromagnetic valve V6 through a pipeline, the other end of the electromagnetic valve DV1 is hermetically connected with the input end of a vacuum compressor ZKJ through a pipeline, the output end of the vacuum compressor ZKJ is hermetically connected with one end of an electromagnetic valve DV2 through a pipeline, and the other end of an electromagnetic valve DV2 is hermetically connected with the sixth electromagnetic valve V6 and the first SF 6 6 Between the gas compressors QTJ1On the pipeline of (2); second SF 6 The input end of the gas compressor QTJ2 is hermetically connected with the sixth electromagnetic valve V6 and the first SF 6 On the line between the gas compressors QTJ1, second SF 6 The output end of the gas compressor QTJ2 is hermetically connected with one end of a tenth electromagnetic valve V10 through a pipeline, the other end of the tenth electromagnetic valve V10 is hermetically connected with a pipeline between a ninth electromagnetic valve V9 and an eleventh electromagnetic valve V11, and a sixth pressure sensor P6 is hermetically installed on the second SF 6 One end of a fifth electromagnetic valve V5 is hermetically connected between a first manual valve S1 and a fourth electromagnetic valve V4 through a pipeline, the other end of the fifth electromagnetic valve V5 is hermetically connected with a third self-sealing joint ZF3 through a pipeline, one end of a seventh electromagnetic valve V7 is hermetically connected with a pipeline between the fourth electromagnetic valve V4 and a pressure stabilizing filter GLQ through a pipeline, the other end of a seventh electromagnetic valve V7 is hermetically connected with the output end of a residual gas collecting tank SJG through a pipeline, one end of a twelfth electromagnetic valve V12 is hermetically connected with the input end of the residual gas collecting tank SJG through a pipeline, the other end of a twelfth electromagnetic valve V12 is hermetically connected with a pipeline between a ninth electromagnetic valve V9 and an eleventh electromagnetic valve V11, and a seventh pressure sensor P7 is hermetically installed at the top of the residual gas collecting tank SJG; a fourth pressure sensor P4 is sealingly mounted in the conduit between fourth solenoid valve V4 and surge tank GLQ, a first relief valve SV1 is sealingly mounted in the conduit between surge tank GLQ and sixth solenoid valve V6, and a fifth pressure sensor P5 is sealingly mounted in the conduit between first SF 6 On the pipeline between gas compressor QTJ1 and ninth solenoid valve V9, second relief valve SV2 is installed on the pipeline between ninth solenoid valve V9 and eleventh solenoid valve V11 in a sealing manner, one end of eighth solenoid valve V8 passes through pipeline sealing connection between first manual valve S1 and fourth solenoid valve V4, the other end of eighth solenoid valve V8 passes through pipeline sealing connection between eleventh solenoid valve V11 and second manual valve S2, adopt high-pressure bellows sealing connection between first self-sealing joint ZF1 and tenth self-sealing joint ZF 10.
As shown in fig. 3, the cooling liquefaction pipeline comprises: eleventh proclaim oneself and connect ZF11, air heat exchanger KQH, plate heat exchanger BH, twelfth proclaim oneself and connect ZF12, the storage tube way that converges of back stage include: a thirteenth self-sealing joint ZF13, a second confluence device HLQ2, a thirteenth solenoid valve V13, a fourteenth solenoid valve V14, a fifteenth solenoid valve V15, an eighth pressure sensor P8, a ninth pressure sensor P9, a tenth pressure sensor P10, a fourteenth self-sealing joint ZF14, a fifteenth self-sealing joint ZF15, a sixteenth self-sealing joint ZF 16;
the input end of the second confluence device HLQ2 is hermetically connected with a thirteenth self-sealing joint ZF13 through a pipeline, the first output end of the second confluence device HLQ2 is hermetically connected with one end of a thirteenth electromagnetic valve V13 through a pipeline, the other end of the thirteenth electromagnetic valve V13 is hermetically connected with a fourteenth self-sealing joint ZF14 through a pipeline, the fourteenth self-sealing joint ZF14 is hermetically connected with a storage tank, and an eighth pressure sensor P8 is hermetically mounted on a pipeline between the thirteenth electromagnetic valve V13 and the fourteenth self-sealing joint ZF 14; a second output end of the second confluence device HLQ2 is in sealed connection with one end of a fourteenth solenoid valve V14 through a pipeline, the other end of the fourteenth solenoid valve V14 is in sealed connection with a fifteenth self-sealing joint ZF15 through a pipeline, the fifteenth self-sealing joint ZF15 is in sealed connection with a storage tank, and a ninth pressure sensor P9 is mounted on the pipeline between the fourteenth solenoid valve V14 and the fifteenth self-sealing joint ZF15 in a sealed manner; a third output end of the second confluence device HLQ2 is in sealed connection with one end of a fifteenth electromagnetic valve V15 through a pipeline, the other end of the fifteenth electromagnetic valve V15 is in sealed connection with a sixteenth self-sealing joint ZF16 through a pipeline, the sixteenth self-sealing joint ZF16 is in sealed connection with a storage tank, and a tenth pressure sensor P10 is mounted on the pipeline between the fifteenth electromagnetic valve V15 and the sixteenth self-sealing joint ZF16 in a sealed manner; the eleventh self-sealing joint ZF11 is in sealing connection with the input end of the air heat exchanger KQH through a pipeline, the output end of the air heat exchanger KQH is in sealing connection with the input end of the plate heat exchanger BH through a pipeline, the output end of the plate heat exchanger BH is in sealing connection with the twelfth self-sealing joint ZF12 through a pipeline, and the twelfth self-sealing joint ZF12 is in sealing connection with the thirteenth self-sealing joint ZF13 through a high-pressure corrugated pipe; the second self-sealing joint ZF2 and the eleventh self-sealing joint ZF11 are in sealing connection by adopting a high-pressure corrugated pipe.
As shown in fig. 4, the storage tank includes: a seventeenth self-sealing joint ZF17, an eighteenth self-sealing joint ZF18, a sixth manual valve S6, an eleventh pressure sensor P11, a third safety valve SV3, a seventh manual valve S7, a tank body 10, a draft tube 11, a bracket 12, a sewage outlet 13, a weight sensor 14 and a flat car 15.
The tank body 10 is arranged on a support 12, the tank body 10 and the support 12 are placed on a flat car 15 together, and a weight sensor 14 is arranged between the upper surface of the flat car 15 and the bottom of the support 12; the flow guide pipe 11 is vertically arranged inside the tank body 10, the input end of the flow guide pipe 11 is arranged at the top of the tank body 10 and is in sealed communication with the output end of the sixth manual valve S6 through a pipeline, the output end of the flow guide pipe extends to the bottom of the tank body 10, the input end of the sixth manual valve S6 is in sealed connection with the seventeenth self-sealing joint ZF17 through a pipeline, and the eleventh pressure sensor P11 is mounted on the pipeline at the output end of the sixth manual valve S6 in a sealed manner; a sewage draining outlet 13 is arranged at the bottom of the tank body 10; the third safety valve SV3 is hermetically arranged at the top of the tank body 10, the input end of a seventh manual valve S7 is hermetically connected with the top of the tank body 10 through a pipeline, and the output end of a seventh manual valve S7 is hermetically connected with an eighteenth self-sealing joint ZF18 through a pipeline; the seventeenth self-sealing joint ZF17 is used as the input end of the storage tank and is connected with the output end of the second confluence device HLQ2 in a sealing mode.
Workflow process
1. Vacuum pumping self-cleaning pipeline
1) Pre-stage confluence pipeline vacuumizing self-cleaning
The fourth self-sealing joint ZF4 and the seventh self-sealing joint ZF7 are in sealing connection by adopting a high-pressure corrugated pipe, the fifth self-sealing joint ZF5 and the eighth self-sealing joint ZF8 are in sealing connection by adopting a high-pressure corrugated pipe, the sixth self-sealing joint ZF6 and the ninth self-sealing joint ZF9 are in sealing connection by adopting a high-pressure corrugated pipe, the tenth self-sealing joint ZF10 and the first self-sealing joint ZF1 are in sealing connection by adopting a high-pressure corrugated pipe, a vacuumizing device is hermetically connected at the third self-sealing joint ZF3, the first manual valve S1, the first electromagnetic valve V1, the second electromagnetic valve V2, the third electromagnetic valve V3 and the fifth electromagnetic valve V5 are opened, the vacuumizing device is started, and (3) vacuumizing the foreline confluence pipeline, closing the vacuumizing device when the vacuum degree meets the requirement, closing the first manual valve S1, the first electromagnetic valve V1, the second electromagnetic valve V2, the third electromagnetic valve V3 and the fifth electromagnetic valve V5, and finishing the vacuum-pumping self-cleaning of the foreline confluence pipeline.
2) Vacuum pumping self-cleaning of graded pressurizing quick recovery pipeline
And (3) a vacuumizing device is hermetically connected at a third self-sealing joint ZF3, a fourth electromagnetic valve V4, a fifth electromagnetic valve V5, a sixth electromagnetic valve V6, an eighth electromagnetic valve V8, a ninth electromagnetic valve V9, a tenth electromagnetic valve V10, an eleventh electromagnetic valve V11, a twelfth electromagnetic valve V12, an electromagnetic valve DV1 and an electromagnetic valve DV2 are opened, the vacuumizing device is started, the graded pressurization fast recovery pipeline is vacuumized, when the vacuum degree meets the requirement, the vacuumizing device is closed, a fourth electromagnetic valve V4, a fifth electromagnetic valve V5, a sixth electromagnetic valve V6, an eighth electromagnetic valve V8, a ninth electromagnetic valve V9, a tenth electromagnetic valve V10, an eleventh electromagnetic valve V11, a twelfth electromagnetic valve V12, an electromagnetic valve DV1 and an electromagnetic valve DV2 are closed, and the graded pressurization fast recovery pipeline is vacuumized and self-cleaned.
3) Vacuumizing self-cleaning device for cooling liquefaction pipeline and post-stage confluence storage pipeline
The twelfth self-sealing joint ZF12 and the thirteenth self-sealing joint ZF13 are in sealing connection through a high-pressure corrugated pipe, the second self-sealing joint ZF2 and the eleventh self-sealing joint ZF11 are in sealing connection through a high-pressure corrugated pipe, a vacuumizing device is in sealing connection with the third self-sealing joint ZF3, a second manual valve S2, a fifth electromagnetic valve V5 and an eighth electromagnetic valve V8 are opened, the vacuumizing device is started, a cooling liquefaction pipeline and a rear-stage confluence storage pipeline are vacuumized, when the vacuum degree meets the requirement, the vacuumizing device is closed, and the second manual valve S2, the fifth electromagnetic valve V5 and the eighth electromagnetic valve V8 are closed.
2. Staged pressurization quick recovery pipeline pair SF 6 SF in gas chamber of gas insulated apparatus 6 Is recycled
(1) For the first SF 6 Gas-insulated apparatus, third SF 6 SF in gas chamber of gas insulated apparatus 6 Gas half-pressure reduction recovery
Assuming the first SF 6 Gas-insulated apparatus, second SF 6 Gas-insulated apparatus, third SF 6 Gas insulationRated pressure values in the edge equipment gas chamber are all a, for the second SF 6 When the gas insulation equipment is vacuumized and overhauled, the first SF adjacent to the gas insulation equipment needs to be subjected to vacuum-pumping 6 Gas-insulated apparatus, third SF 6 SF in gas chamber of gas insulated apparatus 6 Gas half-pressure reduction recovery to prevent adjacent SF 6 The pressure difference in the gas chamber of the gas insulation equipment is too large, so that the safety accident of equipment damage is caused;
the process of half-pressure reduction and recovery comprises the following steps: the third manual valve S3 and the fifth manual valve S5 are opened, the first electromagnetic valve V1 and the third electromagnetic valve V3 are opened, the first manual valve S1, the fourth electromagnetic valve V4, the sixth electromagnetic valve V6, the eleventh electromagnetic valve V11 and the second manual valve S2 are opened, the ninth electromagnetic valve V9 and the tenth electromagnetic valve V10 are opened, and the first SF valve is opened 6 Gas compressor QTJ1, second SF 6 Gas compressor QTJ2 for extracting first SF 6 Gas-insulated apparatus, third SF 6 SF in gas chamber of gas insulated apparatus 6 Gas, when the value of the first pressure sensor P1 is decreased to a/2, the third manual valve S3 and the first solenoid valve V1 are closed, and the first SF is performed 6 The half pressure reduction of the gas chamber of the gas insulation equipment is finished, when the value of the third pressure sensor P3 is reduced to A/2, the fifth manual valve S5 and the third electromagnetic valve V3 are closed, and the third SF is performed 6 The gas chamber of the gas insulation equipment is reduced by half, and the first SF is closed at the moment 6 Gas compressor QTJ1, second SF 6 The gas compressor QTJ2 closes the first manual valve S1, and the half-reduced pressure recovery is completed.
(2) For the second SF 6 SF in gas chamber of gas insulated apparatus 6 Negative pressure recovery of gas
The first manual valve S1 and the fourth electromagnetic valve V4 are opened, the fourth pressure sensor P4 is used for measuring the pressure of the output end of the pre-stage confluence pipeline, and the staged pressurization rapid recovery pipeline is divided into three working modes according to different measured pressure grades;
1) positive pressure high recovery mode
When P4 is more than or equal to 0.3MPa, the second SF 6 SF in gas chamber of gas insulated apparatus 6 The amount of gas is large, and the first SF is started at the same time 6 Gas compressor QTJ1, second SF 6 Gas (es)Compressor QTJ2 for extracting the second SF 6 SF in gas chamber of gas insulated apparatus 6 Gas, two SF 6 The gas compressor works simultaneously, and the recovery speed is improved.
2) Positive pressure low recovery mode
When P4 is more than or equal to 0.08MPa and less than or equal to 0.3MPa, the second SF 6 SF in gas chamber of gas insulated apparatus 6 The gas quantity is reduced, only the first SF is started 6 Gas compressor QTJ1 or second SF 6 One of the gas compressors QTJ2 extracts the second SF 6 SF in gas chambers of gas-insulated apparatus 6 Gas, only one SF is turned on 6 The gas compressor meets the recycling requirement, ensures the safety of equipment and saves electric energy.
3) Negative pressure recovery mode
When P4 < 0.08MPa, the second SF 6 Also small amounts of SF are present in the gas chamber of the gas-insulated apparatus 6 Gas due to SF 6 The gas is greenhouse effect gas, and is required to be completely extracted, at this time, the sixth manual valve S6 is closed, the electromagnetic valve DV1 and the electromagnetic valve DV2 are opened, the vacuum compressor ZKJ is opened, and the first SF is opened 6 Gas compressor QTJ1 (or second SF) 6 Gas compressor QTJ2) for the second SF 6 Vacuumizing the gas chamber of the gas-insulated equipment, and turning off the vacuum compressor ZKJ and the first SF when P2 < -0.04MPa and P4 < -0.04MPa are detected 6 Gas compressor QTJ1 (or second SF) 6 Gas compressor QTJ2) and closes all valves.
At the first SF 6 Gas compressor QTJ1, second SF 6 The output of the gas compressor QTJ2 is provided with a fifth pressure sensor P5 and a sixth pressure sensor P6 for monitoring the first SF 6 Gas compressor QTJ1, second SF 6 Pressure at output of gas compressor QTJ2 when first SF 6 Gas compressor QTJ1, second SF 6 When the pressure at the output of the gas compressor QTJ2 exceeds the limit, even if the system is stopped to protect the first SF 6 Gas compressor QTJ1, second SF 6 A gas compressor QTJ 2.
3. Cooling liquefaction pipeline is quick to step pressure boostRecovering SF output by pipeline 6 Liquefaction of gas
SF to be recycled by grading pressurization quick recycling pipeline 6 The gas is sent into a KQH of an air heat exchanger for first cooling, and then is cooled for the second time through a plate heat exchanger (11) to ensure that SF is cooled for the first time 6 The gas is completely liquefied, and is convenient to store.
4. Continuous collection and storage of post-stage confluence storage pipeline
During storage, the liquid SF output by the liquefaction pipeline is cooled 6 The thirteenth electromagnetic valve V13 is opened by the input from the input terminal of the second confluence device HLQ2, and the liquid SF is input to the first tank 6 When the first tank is full, the fourteenth solenoid valve V14 is opened to supply liquid SF to the second tank 6 At this time, the first tank is replaced, and when the second tank is full, the fifteenth solenoid valve V15 is opened to supply liquid SF to the third tank 6 At the moment, the second storage tank is replaced, and the continuous cycle operation is carried out in sequence until all the liquid SF is collected 6 So far, the problem that the equipment is frequently started and stopped during the field recovery operation is solved, and the liquid SF is realized 6 To be collected and stored continuously.
5. Residual SF in the pipeline 6 Recovery of gases
SF 6 After all the collection and storage are finished, a first solenoid valve V1, a second solenoid valve V2, a third solenoid valve V3, a first manual valve S1, a fourth solenoid valve V4, a sixth solenoid valve V6, an eighth solenoid valve V8, a ninth solenoid valve V9, a twelfth solenoid valve V12 and a second manual valve S2 are opened, and the first SF valve is opened 6 A gas compressor QTJ1 for residual SF in each pipeline 6 Recovering gas and residual SF 6 Gas enters a residual gas collection tank SJG for storage through a twelfth electromagnetic valve V12, and after residual gas is completely recovered, the first SF is closed 6 A gas compressor QTJ1 and various valves; in the positive pressure low recovery mode, the seventh electromagnetic valve V7 is opened to realize the SF in the residual gas collecting tank SJG 6 And (4) recovering the gas.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. Sectional type pressurization and continuous storage SF 6 A gas field recovery device, comprising: the system comprises a preceding-stage confluence pipeline, a staged pressurization quick recovery pipeline, a cooling liquefaction pipeline, a rear-stage confluence storage pipeline and a plurality of storage tanks; the input end of the preceding stage confluence pipeline and a plurality of SFs 6 The gas chamber of the gas insulation equipment is hermetically connected, the output end of the preceding-stage confluence pipeline is hermetically connected with the input end of the staged pressurization rapid recovery pipeline, the output end of the staged pressurization rapid recovery pipeline is hermetically connected with the input end of the cooling liquefaction pipeline, the output end of the cooling liquefaction pipeline is hermetically connected with the input end of the subsequent-stage confluence storage pipeline, and the output end of the subsequent-stage confluence storage pipeline is hermetically connected with the plurality of storage tanks; the preceding stage confluence pipeline is used for synchronously recycling multiple SF 6 SF in gas chamber of gas insulated apparatus 6 A gas; the graded pressurizing quick recovery pipeline is used for recovering the SF 6 SF of gas cell of gas insulation apparatus 6 Gas pressure differential, SF staging to chamber 6 Pressurizing and recovering the gas, and after the operation is finished, carrying out residual liquid and gaseous SF in the pipeline 6 Recovering the gas; the cooling liquefaction pipeline is used for pressurizing SF 6 Carrying out two-stage cooling liquefaction on the gas; the post-stage confluence storage pipeline is used for liquid SF 6 To be collected and stored continuously.
2. Segmented charged, continuously stored SF according to claim 1 6 An in situ gas recovery device, said foreline comprising: a plurality of communicating pipelines and a first confluence device HLQ1, wherein the first confluence device HLQ1 is a multi-input and single-output confluence device, and a plurality of communication pipelines and a plurality of first confluence devices HLQ1 are arranged in the pipeline systemThe input end of the communicating pipeline corresponds to a plurality of SF 6 The gas chambers of the gas insulation equipment are hermetically connected, and the output ends of a plurality of the communication pipelines are correspondingly hermetically connected with a plurality of input ends of the first confluence device HLQ 1; the output end of the first confluence device HLQ1 is hermetically connected with the input end of the staged pressurization quick recovery pipeline; each communicating pipeline is provided with a valve and a pressure sensor.
3. The segmented charged, continuously stored SF according to claim 2 6 The gas on-site recovery device is characterized in that the staged pressurization quick recovery pipeline comprises: a first self-sealing joint ZF1, a first manual valve S1, a fourth electromagnetic valve V4, a fourth pressure sensor P4, a pressure stabilizing filter GLQ, a first safety valve SV1, a sixth electromagnetic valve V6, an electromagnetic valve DV1, a vacuum compressor ZKJ, an electromagnetic valve DV2, a first SF 6 Gas compressor QTJ1, second SF 6 A gas compressor QTJ2, a fifth pressure sensor P5, a sixth pressure sensor P6, a ninth electromagnetic valve V9, a tenth electromagnetic valve V10, a second safety valve SV2, an eleventh electromagnetic valve V11, a twelfth electromagnetic valve V12, a second manual valve S2, a second self-sealing joint ZF2, a seventh pressure sensor P7, a residual gas collection tank SJG, a fifth electromagnetic valve V5, a seventh electromagnetic valve V7, a third self-sealing joint ZF3, and an eighth electromagnetic valve V8;
the first self-sealing joint ZF1 is in sealing connection with one end of a first manual valve S1, the other end of the first manual valve S1 is in sealing connection with one end of a fourth electromagnetic valve V4, the other end of the fourth electromagnetic valve V4 is in sealing connection with the input end of a voltage stabilizing filter GLQ, the output end of the voltage stabilizing filter GLQ is in sealing connection with one end of a sixth electromagnetic valve V6, and the other end of the sixth electromagnetic valve V6 is in sealing connection with one end of a first SF 6 Input end of gas compressor QTJ1 is hermetically connected, first SF 6 The output end of the gas compressor QTJ1 is connected with one end of a ninth electromagnetic valve V9 in a sealing manner, the other end of the ninth electromagnetic valve V9 is connected with one end of an eleventh electromagnetic valve V11 in a sealing manner, the other end of the eleventh electromagnetic valve V11 is connected with one end of a second manual valve S2 in a sealing manner, the other end of the second manual valve S2 is connected with a second self-sealing joint ZF2 in a sealing manner, and one end of an electromagnetic valve DV1 is sealedThe sealing connection is between the GLQ and a sixth electromagnetic valve V6, the other end of the electromagnetic valve DV1 is in sealing connection with the input end of the vacuum compressor ZKJ, the output end of the vacuum compressor ZKJ is in sealing connection with one end of the electromagnetic valve DV2, and the other end of the electromagnetic valve DV2 is in sealing connection with the sixth electromagnetic valve V6 and the first SF 6 On the conduit between the gas compressors QTJ 1; second SF 6 The input end of the gas compressor QTJ2 is hermetically connected with the sixth electromagnetic valve V6 and the first SF 6 On the line between the gas compressors QTJ1, second SF 6 The output end of the gas compressor QTJ2 is hermetically connected with one end of a tenth solenoid valve V10, the other end of the tenth solenoid valve V10 is hermetically connected to a pipeline between a ninth solenoid valve V9 and an eleventh solenoid valve V11, and a sixth pressure sensor P6 is hermetically installed on the second SF 6 On a pipeline between a gas compressor QTJ2 and a tenth electromagnetic valve V10, one end of a fifth electromagnetic valve V5 is hermetically connected between a first manual valve S1 and a fourth electromagnetic valve V4, the other end of the fifth electromagnetic valve V5 is hermetically connected with a third self-sealing joint ZF3, one end of a seventh electromagnetic valve V7 is hermetically connected on a pipeline between a fourth electromagnetic valve V4 and a pressure stabilizing filter GLQ, the other end of the seventh electromagnetic valve V7 is hermetically connected with an output end of a residual gas collection tank SJG, one end of a twelfth electromagnetic valve V12 is hermetically connected at an input end of a residual gas collection tank SJG, the other end of a twelfth electromagnetic valve V12 is hermetically connected on a pipeline between a ninth electromagnetic valve V9 and an eleventh electromagnetic valve V11, and a seventh pressure sensor P7 is hermetically installed at the top of the residual gas collection tank SJG; a fourth pressure sensor P4 is sealingly mounted in the conduit between fourth solenoid valve V4 and surge tank GLQ, a first relief valve SV1 is sealingly mounted in the conduit between surge tank GLQ and sixth solenoid valve V6, and a fifth pressure sensor P5 is sealingly mounted in the conduit between first SF 6 A pipeline between the gas compressor QTJ1 and the ninth electromagnetic valve V9, a second safety valve SV2 is hermetically installed on the pipeline between the ninth electromagnetic valve V9 and the eleventh electromagnetic valve V11, one end of the eighth electromagnetic valve V8 is hermetically connected between the first manual valve S1 and the fourth electromagnetic valve V4, the other end of the eighth electromagnetic valve V8 is hermetically connected between the eleventh electromagnetic valve V11 and the second manual valve S2, and the output ends of the first self-sealing joint ZF1 and the first confluence device HLQ1 adopt high pressureThe corrugated pipe is connected in a sealing way.
4. Segmented charged, continuously stored SF according to claim 3 6 The on-site gas recovery device is characterized in that the cooling liquefaction pipeline comprises: an eleventh self-sealing joint ZF11, an air heat exchanger KQH, a plate heat exchanger BH and a twelfth self-sealing joint ZF 12; the latter stage confluence storage pipe comprises: a thirteenth self-sealing joint ZF13, a second confluence device HLQ2, a thirteenth solenoid valve V13, a fourteenth solenoid valve V14, a fifteenth solenoid valve V15, an eighth pressure sensor P8, a ninth pressure sensor P9, a tenth pressure sensor P10, a fourteenth self-sealing joint ZF14, a fifteenth self-sealing joint ZF15, a sixteenth self-sealing joint ZF 16; the eleventh self-sealing joint ZF11 and the second self-sealing joint ZF2 are in sealing connection through a high-pressure corrugated pipe, the eleventh self-sealing joint ZF11 is in sealing connection with the input end of the air heat exchanger KQH, the output end of the air heat exchanger KQH is in sealing connection with the input end of the plate heat exchanger BH, the output end of the plate heat exchanger BH is in sealing connection with the twelfth self-sealing joint ZF12, and the twelfth self-sealing joint ZF12 and the thirteenth self-sealing joint ZF13 are in sealing connection through a high-pressure corrugated pipe; a first output end of the second confluence device HLQ2 is in sealing connection with one end of a thirteenth solenoid valve V13, the other end of the thirteenth solenoid valve V13 is in sealing connection with a fourteenth self-sealing joint ZF14, the fourteenth self-sealing joint ZF14 is in sealing connection with a storage tank, and an eighth pressure sensor P8 is in sealing connection with a pipeline between the thirteenth solenoid valve V13 and the fourteenth self-sealing joint ZF 14; a second output end of the second confluence device HLQ2 is connected with one end of a fourteenth solenoid valve V14 in a sealing manner, the other end of the fourteenth solenoid valve V14 is connected with a fifteenth self-sealing joint ZF15 in a sealing manner, the fifteenth self-sealing joint ZF15 is connected with a storage tank in a sealing manner, and a ninth pressure sensor P9 is installed on a pipeline between the fourteenth solenoid valve V14 and the fifteenth self-sealing joint ZF15 in a sealing manner; a third output end of the second confluence device HLQ2 is in sealing connection with one end of a fifteenth electromagnetic valve V15, the other end of the fifteenth electromagnetic valve V15 is in sealing connection with a sixteenth self-sealing joint ZF16, the sixteenth self-sealing joint ZF16 is in sealing connection with a storage tank, and a tenth pressure sensor P10 is in sealing connection with the fifteenth electromagnetic valve V15 and a fifteenth electromagnetic valve V3538The sixteenth self-sealing joint ZF 16.
5. The segmented charged, continuously stored SF according to claim 4 6 A gas field recovery unit, said storage tank comprising: a seventeenth self-sealing joint ZF17, an eighteenth self-sealing joint ZF18, a sixth manual valve S6, an eleventh pressure sensor P11, a third safety valve SV3, a seventh manual valve S7, a tank body (10), a draft tube (11), a bracket (12), a sewage outlet (13), a weight sensor (14) and a flat car (15); the tank body (10) is arranged on the support (12), the tank body (10) and the support (12) are placed on the flat car (15), and the weight sensor (14) is arranged between the upper surface of the flat car (15) and the bottom of the support (12); the flow guide pipe (11) is vertically arranged inside the tank body (10), the input end of the flow guide pipe (11) is arranged at the top of the tank body (10) and is in sealed communication with the output end of the sixth manual valve S6 through a pipeline, the output end of the flow guide pipe extends to the bottom of the tank body (10), the input end of the sixth manual valve S6 is in sealed connection with a seventeenth self-sealing joint ZF17 through a pipeline, and the eleventh pressure sensor P11 is mounted on the pipeline of the output end of the sixth manual valve S6 in a sealed manner; a sewage draining outlet (13) is arranged at the bottom of the tank body (10); the third safety valve SV3 is hermetically arranged at the top of the tank body (10), the input end of a seventh manual valve S7 is hermetically connected with the top of the tank body (10) through a pipeline, and the output end of a seventh manual valve S7 is hermetically connected with an eighteenth self-sealing joint ZF18 through a pipeline; the seventeenth self-sealing joint ZF17 is used as the input end of the storage tank and is connected with the output end of the second confluence device HLQ2 in a sealing mode.
6. The segmented charged, continuously stored SF according to claim 4 6 The gas on-site recovery device is characterized in that a pipeline is vacuumized and self-cleaned before the device is used, and the method comprises the following steps:
1) pre-stage confluence pipeline vacuumizing self-cleaning
The fourth self-sealing joint ZF4 and the seventh self-sealing joint ZF7 are in sealing connection by adopting a high-pressure corrugated pipe, the fifth self-sealing joint ZF5 and the eighth self-sealing joint ZF8 are in sealing connection by adopting a high-pressure corrugated pipe, the sixth self-sealing joint ZF6 and the ninth self-sealing joint ZF9 are in sealing connection by adopting a high-pressure corrugated pipe, the tenth self-sealing joint ZF10 and the first self-sealing joint ZF1 are in sealing connection by adopting a high-pressure corrugated pipe, a vacuumizing device is hermetically connected at the third self-sealing joint ZF3, the first manual valve S1, the first electromagnetic valve V1, the second electromagnetic valve V2, the third electromagnetic valve V3 and the fifth electromagnetic valve V5 are opened, the vacuumizing device is started, vacuumizing the preceding-stage confluence pipeline, closing the vacuumizing device when the vacuum degree meets the requirement, closing a first manual valve S1, a first electromagnetic valve V1, a second electromagnetic valve V2, a third electromagnetic valve V3 and a fifth electromagnetic valve V5, and finishing vacuumizing and self-cleaning of the preceding-stage confluence pipeline;
2) vacuum pumping self-cleaning of graded pressurizing quick recovery pipeline
Connecting a vacuumizing device at a third self-sealing joint ZF3 in a sealing manner, opening a fourth electromagnetic valve V4, a fifth electromagnetic valve V5, a sixth electromagnetic valve V6, an eighth electromagnetic valve V8, a ninth electromagnetic valve V9, a tenth electromagnetic valve V10, an eleventh electromagnetic valve V11, a twelfth electromagnetic valve V12, an electromagnetic valve DV1 and an electromagnetic valve DV2, starting the vacuumizing device, vacuumizing the graded pressurization fast recovery pipeline, closing the vacuumizing device when the vacuum degree meets the requirement, closing a fourth electromagnetic valve V4, a fifth electromagnetic valve V5, a sixth electromagnetic valve V6, an eighth electromagnetic valve V8, a ninth electromagnetic valve V9, a tenth electromagnetic valve V10, an eleventh electromagnetic valve V11, a twelfth electromagnetic valve V12, an electromagnetic valve DV1 and an electromagnetic valve DV2, and finishing self-cleaning of the graded pressurization fast recovery pipeline;
3) vacuumizing self-cleaning device for cooling liquefaction pipeline and post-stage confluence storage pipeline
The twelfth self-sealing joint ZF12 and the thirteenth self-sealing joint ZF13 are in sealing connection through a high-pressure corrugated pipe, the second self-sealing joint ZF2 and the eleventh self-sealing joint ZF11 are in sealing connection through a high-pressure corrugated pipe, a vacuumizing device is in sealing connection with the third self-sealing joint ZF3, a second manual valve S2, a fifth electromagnetic valve V5 and an eighth electromagnetic valve V8 are opened, the vacuumizing device is started, a cooling liquefaction pipeline and a rear-stage confluence storage pipeline are vacuumized, when the vacuum degree meets the requirement, the vacuumizing device is closed, and the second manual valve S2, the fifth electromagnetic valve V5 and the eighth electromagnetic valve V8 are closed.
7. The segmented charged, continuously stored SF according to claim 4 6 Gas on-site recovery device, characterized in that said device according to SF 6 SF of gas cell of gas insulation apparatus 6 Pressure differential of gas, staged SF against the chamber 6 The flow of pressurizing and recovering the gas is as follows:
the first manual valve S1 and the fourth electromagnetic valve V4 are opened, and the fourth pressure sensor P4 is used for measuring the pressure at the output end of the foreline, and is divided into three operation modes according to the measured pressure level:
1) positive pressure high recovery mode: when P4 is greater than or equal to the first threshold, the first SF is started simultaneously 6 Gas compressor QTJ1, second SF 6 Gas compressor QTJ2 for co-pumping SF 6 SF in gas chamber of gas insulated apparatus 6 A gas;
2) positive pressure low recovery mode: when P4 is less than the first threshold and greater than or equal to the second threshold, only the first SF is started 6 Gas compressor QTJ1 or second SF 6 One of the gas compressors QTJ2 extracts SF 6 SF in gas chambers of gas-insulated apparatus 6 A gas;
3) a negative pressure recovery mode: when P4 is less than the second threshold, the sixth manual valve S6 is closed, solenoid valves DV1 and DV2 are opened, vacuum compressor ZKJ is started, and first SF is started 6 Gas compressor QTJ1 or second SF 6 Gas compressor QTJ2 for SF 6 And vacuumizing the gas chamber of the gas insulation equipment.
8. The segmented charged, continuously stored SF according to claim 4 6 Gas on-site recovery device, characterized in that said device is used for recovering residual liquid and gaseous SF in the pipeline after the operation is finished 6 The recovery procedure was as follows: SF 6 After all the collection and storage are completed, the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, the first manual valve S1, the fourth solenoid valve V4, the sixth solenoid valve V6, the eighth solenoid valve V8, the ninth solenoid valve V9, and the twelfth solenoid valve V9 are openedV12, second hand valve S2, first SF is opened 6 A gas compressor QTJ1 for residual SF in each pipeline 6 Recovering gas and residual SF 6 The gas enters a residual gas collecting tank SJG for storage through a twelfth electromagnetic valve V12, and the residual SF is stored 6 After the gas recovery is completed, the first SF is shut down 6 A gas compressor QTJ1 and various valves; in the positive pressure low recovery mode, the seventh electromagnetic valve V7 is opened to realize the SF in the residual gas collecting tank SJG 6 And (4) recovering the gas.
9. The segmented charged, continuously stored SF according to claim 4 6 The gas on-site recovery device is characterized in that the pressurized SF is 6 The flow of the gas for two-stage temperature reduction and liquefaction is as follows: SF (sulfur hexafluoride) recycled by pressurizing through graded pressurizing quick recycling pipeline 6 The gas is sent into a KQH of an air heat exchanger for first cooling, and then is cooled for the second time through a plate heat exchanger (11) to ensure that SF is cooled for the first time 6 The gas is completely liquefied.
10. The segmented charged, continuously stored SF according to claim 4 6 The gas on-site recovery device is characterized in that the liquid SF 6 The procedure of continuous collection and storage of (1) is as follows: cooling liquid SF output by liquefaction pipeline 6 The thirteenth electromagnetic valve V13 is opened by the input from the input terminal of the second confluence device HLQ2, and the liquid SF is input to the first tank 6 When the first tank is full, the fourteenth solenoid valve V14 is opened to supply liquid SF to the second tank 6 At this time, the first tank is replaced, and when the second tank is full, the fifteenth solenoid valve V15 is opened to supply liquid SF to the third tank 6 At the moment, the second storage tank is replaced, and the continuous cycle operation is carried out in sequence until all the liquid SF is collected 6 Until now.
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