CN114857492B - Sectional type supercharged and continuously stored SF 6 Gas on-site recovery device - Google Patents
Sectional type supercharged and continuously stored SF 6 Gas on-site recovery device Download PDFInfo
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- CN114857492B CN114857492B CN202210410059.2A CN202210410059A CN114857492B CN 114857492 B CN114857492 B CN 114857492B CN 202210410059 A CN202210410059 A CN 202210410059A CN 114857492 B CN114857492 B CN 114857492B
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- 238000011084 recovery Methods 0.000 title claims abstract description 103
- 238000003860 storage Methods 0.000 claims abstract description 83
- 238000009413 insulation Methods 0.000 claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 32
- 238000004064 recycling Methods 0.000 claims abstract description 15
- 229910018503 SF6 Inorganic materials 0.000 claims abstract description 10
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229960000909 sulfur hexafluoride Drugs 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 379
- 239000007788 liquid Substances 0.000 claims description 34
- 230000000087 stabilizing effect Effects 0.000 claims description 21
- 238000004140 cleaning Methods 0.000 claims description 13
- 101100064324 Arabidopsis thaliana DTX48 gene Proteins 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000000284 extract Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 238000013024 troubleshooting Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 188
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000008859 change 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
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012423 maintenance Methods 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
- 239000010865 sewage Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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 supercharged and continuously stored SF 6 Gas on-site recovery device belongs to transformer substation SF 6 The recycling technology field solves the problem of low recycling efficiency of the existing device; synchronous recovery of multiple SF's using a pre-confluence pipeline 6 Gas-chamber SF of gas insulation equipment 6 A gas; adopts a graded pressurizing quick recovery pipeline and depends on SF of the air chamber 6 SF for gas chamber in stages with different pressure of gas 6 The gas is pressurized and recycled, so that the recycling speed is improved; residual SF in the pipeline after the end of the operation 6 The gas is recovered, so that the pollution to the environment is avoided; SF after pressurization through cooling liquefaction pipeline 6 The gas is subjected to two-stage cooling liquefaction to lead SF 6 The gas is completely liquefied, so that the storage is convenient; by passing throughLiquid SF (sulfur hexafluoride) is stored in a later-stage confluence pipeline pair 6 Continuous collection and storage are carried out, so that frequent startup and shutdown of the equipment are avoided; the invention greatly improves SF under ultra-high voltage and extra-high voltage 6 SF in the engineering of trouble shooting, extension and the like of gas insulation equipment and full-closed combined electrical appliance 6 Efficiency of gas recovery.
Description
Technical Field
The invention belongs to a transformer substation SF 6 The technical field of recovery relates to a sectional type supercharging and continuous storage SF 6 A gas on-site recovery device.
Background
With the high-speed development of the global energy Internet, a large amount of SF 6 The gas-insulated device is commonly used in ultra-high voltage, extra-high voltage and fully-enclosed combined electrical appliances. SF (sulfur hexafluoride) 6 The greenhouse effect is obvious, is one of six greenhouse gases which are clearly pointed out in the "Kyoto protocol of the United nations climate change framework convention", so SF is necessary to be paid 6 The gas is recovered, treated and reused, thereby meeting the environmental protection requirement.
The invention provides a method and a system for recovering and purifying sulfur hexafluoride gas, which aims at solving the problems of low recovery rate and recovery purity and high liquid nitrogen consumption in the prior art in China patent application No. CN113803960A and application publication No. 2021, 12 and 17.
At present, the current time of the process,site SF 6 In the recovery process, a recovery device SF is usually added to improve the recovery efficiency 6 The mode of compressor displacement, on one hand, the device is expensive, the whole volume is great and is inconvenient for long-distance transportation and complicated in operation, on the other hand, because of receiving SF 6 The insulating equipment self-sealing joint, the conveying pipeline are longer, and the like, so that a certain acceleration effect is achieved at the initial stage of recovery operation, but the effect of the insulating equipment self-sealing joint and the conveying pipeline is not ideal at the middle and later stages.
For SF 6 In-situ recovery operation, a recovery device and a storage container are usually transported to an operation site by a transport vehicle for collection and storage, but peripheral electrified equipment of the operation site is more, the device and the storage container are difficult to hoist to the vicinity of an air chamber to be recovered, and meanwhile, the recovery of a certain air chamber also needs to perform half-reduction treatment on an adjacent air chamber, so that a conventionally used SF (sulfur hexafluoride) is needed 6 The recovery method cannot operate the portable multi-air chamber at the same time, so that the timeliness of recovery operation is seriously affected, and for the fault overhaul and extension engineering of ultra-high voltage and ultra-high voltage electrical equipment and a fully-closed combined electrical appliance, a large amount of gas recovery work is needed, and the recovery progress is related to the problems of whether the engineering is completed on time, whether a power failure plan is changed and the like.
For ultrahigh voltage and extra-high voltage SF 6 Gas-insulated equipment and fully-enclosed combined electrical apparatus, in engineering such as fault maintenance and extension, due to SF thereof 6 The gas volume in the gas chamber is huge, the existing storage device can not continuously and completely collect and store the gas at one time, and the recovery equipment is required to be frequently started and stopped during on-site recovery operation, so that SF is caused 6 The recovery work is extremely inconvenient, and meanwhile, the potential safety hazard is increased.
Disclosure of Invention
The invention aims to design a sectional supercharging and continuous storage SF 6 The gas on-site recovery device solves the problem that the prior device can not synchronously and continuously recover a plurality of SF 6 SF in gas chamber of gas insulated equipment 6 Gas, and thus the recovery efficiency is low.
The invention solves the technical problems through the following technical scheme:
in order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
sectional type supercharged and continuously stored SF 6 A gas on-site recovery device comprising: a front-stage converging pipeline, a staged pressurizing quick recovery pipeline, a cooling liquefying pipeline, a rear-stage converging storage pipeline and a plurality of storage tanks; the input end of the front-stage converging pipeline and a plurality of SF 6 The gas chamber of the gas insulation device is in sealing connection, the output end of the front-stage converging pipeline is in sealing connection with the input end of the staged supercharging rapid recovery pipeline, the output end of the staged supercharging rapid recovery pipeline is in sealing connection with the input end of the cooling liquefaction pipeline, the output end of the cooling liquefaction pipeline is in sealing connection with the input end of the rear-stage converging storage pipeline, and the output end of the rear-stage converging storage pipeline is in sealing connection with a plurality of storage tanks; the front-stage confluence pipeline is used for synchronously recycling a plurality of SF 6 SF in gas chamber of gas insulated equipment 6 A gas; the grading pressurization quick recovery pipeline is used for carrying out SF (sulfur hexafluoride) treatment 6 SF of gas chamber of gas insulation equipment 6 SF for gas chamber in stages with different pressure of gas 6 The gas is pressurized and recovered, and residual liquid and gaseous SF in the pipeline is carried out after the operation is finished 6 Recycling; the cooling and liquefying pipeline is used for pressurizing SF 6 Two-stage cooling and liquefying of the gas; the rear-stage confluence storage pipeline is used for liquid SF 6 Is stored in a continuous collection.
SF of the present invention 6 Gas field recovery device for synchronously recovering multiple SF by adopting front-stage converging pipeline 6 SF in gas chamber of gas insulated equipment 6 Gas, SF in a plurality of gas chambers is realized 6 Synchronous gas recovery; adopts a graded pressurizing quick recovery pipeline, and according to SF 6 SF of gas chamber of gas insulation equipment 6 SF for gas chamber in stages with different pressure of gas 6 The gas is pressurized and recycled, so that the recycling speed is improved, the safety of equipment is ensured, and the electric energy is saved; residual liquid and gaseous SF in the pipeline after the operation is completed 6 Recovery is carried out, so that environmental pollution is avoided, and residual liquid SF in a pipeline is prevented 6 Gasifying and damaging the pressure of the pipeline; by cold SF after pressurization by a liquefied pipeline 6 The gas is subjected to two-stage cooling liquefaction to lead SF 6 The gas is completely liquefied, so that the storage is convenient; liquid SF is conducted through a rear-stage confluence storage pipeline 6 The continuous collection and storage of the equipment are avoided, the frequent startup and shutdown of the equipment during the on-site recovery operation are avoided, and the SF under ultra-high voltage and ultra-high voltage is greatly improved 6 SF in the engineering of trouble shooting, extension and the like of gas insulation equipment and full-closed combined electrical appliance 6 Efficiency of gas recovery.
Further, the foreline includes: a plurality of communication pipelines 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 communication pipelines correspond to a plurality of SF 6 The gas chambers of the gas insulation equipment are in sealed connection, and the output ends of the plurality of communication pipelines are in sealed connection with the first converging device HLQ1 correspondingly; the output end of the first converging device HLQ1 is in sealing connection with the input end of the graded supercharging quick recovery pipeline; and each communicating pipe is provided with a valve and a pressure sensor.
Further, the staged supercharging quick recovery pipeline comprises: the first self-sealing joint ZF1, the first manual valve S1, the fourth electromagnetic valve V4, the fourth pressure sensor P4, the pressure stabilizing filter GLQ, the first safety valve SV1, the sixth electromagnetic valve V6, the electromagnetic valve DV1, the vacuum compressor ZKJ, the electromagnetic valve DV2 and the first SF 6 Gas compressor QTJ, second SF 6 A gas compressor QTJ, a fifth pressure sensor P5, a sixth pressure sensor P6, a ninth solenoid valve V9, a tenth solenoid valve V10, a second safety valve SV2, an eleventh solenoid valve V11, a twelfth solenoid valve V12, a second manual valve S2, a second self-sealing joint ZF2, a seventh pressure sensor P7, a sweep gas collection tank SJG, a fifth solenoid valve V5, a seventh solenoid valve V7, a third self-sealing joint ZF3, an eighth solenoid 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 pressure stabilizing filter GLQ, and the pressure stabilizing filterThe output end of the 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 connected with the first SF 6 The input end of the gas compressor QTJ1 is connected in a sealing way, and the first SF is 6 The output end of the gas compressor QTJ1 is in sealing connection with one end of a ninth electromagnetic valve V9, the other end of the ninth electromagnetic valve V9 is in sealing connection with one end of an eleventh electromagnetic valve V11, the other end of the eleventh electromagnetic valve V11 is in sealing connection with one end of a second manual valve S2, the other end of the second manual valve S2 is in sealing connection with a second self-sealing joint ZF2, one end of the electromagnetic valve DV1 is in sealing connection between a pressure stabilizing filter GLQ and a sixth electromagnetic valve V6, the other end of the electromagnetic valve DV1 is in sealing connection with the input end of a 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 piping between the gas compressors QTJ 1; second SF 6 The input end of the gas compressor QTJ2 is connected with the sixth electromagnetic valve V6 and the first SF in a sealing way 6 On the pipeline between the gas compressors QTJ1, the second SF 6 The output end of the gas compressor QTJ2 is in sealing connection with one end of a tenth electromagnetic valve V10, the other end of the tenth electromagnetic valve V10 is in sealing connection with a pipeline between a ninth electromagnetic valve V9 and an eleventh electromagnetic valve V11, and a sixth pressure sensor P6 is in sealing connection with the second SF 6 One end of a fifth electromagnetic valve V5 is connected between the first manual valve S1 and the fourth electromagnetic valve V4 in a sealing way, the other end of the fifth electromagnetic valve V5 is connected with a third self-sealing joint ZF3 in a sealing way, one end of a seventh electromagnetic valve V7 is connected on the pipeline between the fourth electromagnetic valve V4 and a pressure stabilizing filter GLQ in a sealing way, the other end of the seventh electromagnetic valve V7 is connected with the output end of a residual gas collection tank SJG in a sealing way, one end of a twelfth electromagnetic valve V12 is connected on the input end of the residual gas collection tank SJG in a sealing way, the other end of the twelfth electromagnetic valve V12 is connected on the pipeline between a ninth electromagnetic valve V9 and an eleventh electromagnetic valve V11 in a sealing way, and a seventh pressure sensor P7 is arranged on the top of the residual gas collection tank SJG in a sealing way; the fourth pressure sensor P4 is arranged on a pipeline between the fourth electromagnetic valve V4 and the pressure stabilizing filter GLQ in a sealing way, and the first safety valve SV1 is arranged on the pressure stabilizing filter GLQ and the sixth electromagnetic valve in a sealing way On the pipe between the valves V6, a fifth pressure sensor P5 is sealingly mounted at the first SF 6 On the pipeline between the gas compressor QTJ and the ninth solenoid valve V9, a second safety valve SV2 is arranged on the pipeline between the ninth solenoid valve V9 and the eleventh solenoid valve V11 in a sealing mode, one end of the eighth solenoid valve V8 is connected between the first manual valve S1 and the fourth solenoid valve V4 in a sealing mode, the other end of the eighth solenoid valve V8 is connected between the eleventh solenoid valve V11 and the second manual valve S2 in a sealing mode, and the output end of the first self-sealing joint ZF1 and the output end of the first converging device HLQ1 are connected in a sealing mode through high-pressure bellows.
Further, the cooling and liquefying pipeline comprises: eleventh self-sealing joint ZF11, air heat exchanger KQH, plate heat exchanger BH, twelfth self-sealing joint ZF12; the rear-stage confluence storage pipeline comprises: thirteenth self-sealing joint ZF13, second confluence device HLQ2, thirteenth solenoid valve V13, fourteenth solenoid valve V14, fifteenth solenoid valve V15, eighth pressure sensor P8, ninth pressure sensor P9, tenth pressure sensor P10, fourteenth self-sealing joint ZF14, fifteenth self-sealing joint ZF15, sixteenth self-sealing joint ZF16; the eleventh self-sealing joint ZF11 is in sealing connection with the second self-sealing joint ZF2 by adopting 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 is in sealing connection with the thirteenth self-sealing joint ZF13 by adopting a high-pressure corrugated pipe; the first output end of the second confluence device HLQ2 is in sealing connection with one end of a thirteenth electromagnetic valve V13, the other end of the thirteenth electromagnetic 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 arranged on a pipeline between the thirteenth electromagnetic valve V13 and the fourteenth self-sealing joint ZF14 in a sealing manner; the second output end of the second converging device HLQ2 is in sealing connection with one end of a fourteenth electromagnetic valve V14, the other end of the fourteenth electromagnetic valve V14 is in sealing connection with a fifteenth self-sealing joint ZF15, the fifteenth self-sealing joint ZF15 is in sealing connection with a storage tank, and a ninth pressure sensor P9 is arranged on a pipeline between the fourteenth electromagnetic valve V14 and the fifteenth self-sealing joint ZF15 in a sealing manner; the third output end of the second converging 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 arranged 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: seventeenth self-sealing joint ZF17, eighteenth self-sealing joint ZF18, sixth manual valve S6, eleventh pressure sensor P11, third safety valve SV3, seventh manual valve S7, tank (10), draft tube (11), bracket (12), drain outlet (13), weight sensor (14), flatbed (15); the tank body (10) is arranged on the bracket (12), the tank body (10) and the bracket (12) are placed on the 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 bracket (12); the honeycomb duct (11) is vertically arranged in the tank body (10), the input end of the honeycomb duct (11) is arranged at the top of the tank body (10) and is communicated with the output end of the sixth manual valve S6 in a sealing way through a pipeline, the output end of the honeycomb duct extends to the bottom of the tank body (10), the input end of the sixth manual valve S6 is connected with the seventeenth self-sealing joint ZF17 in a sealing way through a pipeline, and the eleventh pressure sensor P11 is arranged on the pipeline of the output end of the sixth manual valve S6 in a sealing way; a drain outlet (13) is arranged at the bottom of the tank body (10); the third safety valve SV3 is arranged at the top of the tank body (10) in a sealing way, the input end of the seventh manual valve S7 is connected with the top of the tank body (10) in a sealing way through a pipeline, and the output end of the seventh manual valve S7 is connected with the eighteenth self-sealing joint ZF18 in a sealing way through a pipeline; the seventeenth self-sealing joint ZF17 is used as an input end of the storage tank and is connected with an output end of the second converging device HLQ2 in a sealing mode.
Further, the pipeline is vacuumized and self-cleaned before the device is used, and the method comprises the following steps:
1) Vacuum-pumping self-cleaning device for front-stage converging pipeline
The fourth self-sealing joint ZF4 and the seventh self-sealing joint ZF7 are in sealed connection by adopting a high-pressure corrugated pipe, the fifth self-sealing joint ZF5 and the eighth self-sealing joint ZF8 are in sealed connection by adopting a high-pressure corrugated pipe, the sixth self-sealing joint ZF6 and the ninth self-sealing joint ZF9 are in sealed connection by adopting a high-pressure corrugated pipe, the tenth self-sealing joint ZF10 and the first self-sealing joint ZF1 are in sealed connection by adopting a high-pressure corrugated pipe, a vacuumizing device is in sealed connection at the third self-sealing joint ZF3, 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 are opened, vacuumizing is started for a front-stage confluence pipeline, when the vacuum degree meets the requirement, the vacuumizing device is closed, 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 closed, and the front-stage confluence pipeline is vacuumized;
2) Vacuum pumping self-cleaning device for graded pressurizing quick recovery pipeline
The third self-sealing joint ZF3 is connected with a vacuumizing device in a sealing way, 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 to vacuumize the graded supercharging quick recovery pipeline, when the vacuum degree meets the requirement, the vacuumizing device is closed, the fourth electromagnetic valve V4, the fifth electromagnetic valve V5, the sixth electromagnetic valve V6, the eighth electromagnetic valve V8, the ninth electromagnetic valve V9, the tenth electromagnetic valve V10, the eleventh electromagnetic valve V11, the twelfth electromagnetic valve V12, the electromagnetic valves DV1 and DV2 are closed, and the graded supercharging quick recovery pipeline is vacuumized and self-cleaning is finished;
3) Vacuumizing self-cleaning device for cooling liquefying pipeline and post-stage converging 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, the third self-sealing joint ZF3 is in sealing connection with a vacuumizing device, the second manual valve S2, the fifth electromagnetic valve V5 and the eighth electromagnetic valve V8 are opened, the vacuumizing device is started, vacuumizing is carried out on the cooling liquefaction pipeline and the rear-stage confluence storage pipeline, and 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, according to SF 6 SF of gas chamber of gas insulation equipment 6 SF for gas chamber in stages with different pressure of gas 6 The flow of pressurizing and recycling the gas is as follows:
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 front-stage confluence pipeline, and the three working modes are divided according to different measured pressure levels:
1) Positive pressure high recovery mode: when P4 is greater than or equal to a first threshold value, simultaneously starting a first SF 6 Gas compressor QTJ, second SF 6 Gas compressor QTJ, co-pumping SF 6 SF in gas insulation equipment gas chamber 6 A gas;
2) Positive pressure low recovery mode: when P4 is smaller than the first threshold and larger than or equal to the second threshold, only the first SF is started 6 Gas compressor QTJ or second SF 6 One of the gas compressors QTJ2 extracts SF 6 SF in gas insulation equipment gas chamber 6 A gas;
3) Negative pressure recovery mode: when P4 is smaller than the second threshold, the sixth manual valve S6 is closed, the solenoid valves DV1 and DV2 are opened, the vacuum compressor ZKJ is opened, and the first SF is opened 6 Gas compressor QTJ or second SF 6 Gas compressor QTJ, 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 process is as follows: SF (sulfur hexafluoride) 6 After all the materials are collected and stored, the first electromagnetic valve V1, the second electromagnetic valve V2, the third electromagnetic valve V3, the first manual valve S1, the fourth electromagnetic valve V4, the sixth electromagnetic valve V6, the eighth electromagnetic valve V8, the ninth electromagnetic valve V9, the twelfth electromagnetic valve V12 and the second manual valve S2 are opened, and the first SF is opened 6 The gas compressor QTJ is used for the SF remained in each pipeline 6 Recovering the gas and residual SF 6 The gas enters a residual gas collection tank SJG through a twelfth electromagnetic valve V12 for storage, and residual SF is remained 6 Gas and its preparation methodAfter the recovery is finished, the first SF is closed 6 A gas compressor QTJ and respective valves; in the positive pressure low recovery mode, the seventh electromagnetic valve V7 is opened to realize SF in the residual gas collection tank SJG 6 And (5) recovering the gas.
Further, the SF after pressurization 6 The flow of two-stage cooling liquefaction of the gas is as follows: SF (sulfur hexafluoride) for recycling pressurization through graded pressurization quick recycling pipeline 6 The gas is sent into an air heat exchanger KQH to be cooled for the first time, and then is subjected to a plate heat exchanger (11) to be cooled for the second time, so that SF is achieved 6 The gas is completely liquefied.
Further, the liquid SF 6 The flow of the continuous collection and storage of the (c) is as follows: liquid SF output by cooling liquefaction pipeline 6 The liquid SF is input from the input end of the second confluence device HLQ2, the thirteenth electromagnetic valve V13 is opened, and the liquid SF is input to the first storage tank 6 When the first storage tank is full, the fourteenth electromagnetic valve V14 is opened, and the liquid SF is input into the second storage tank 6 The first storage tank is replaced at this time, when the second storage tank is full, the fifteenth electromagnetic valve V15 is opened, and the liquid SF is input into the third storage tank 6 At this time, the second storage tank is replaced, and the operation is continuously and circularly performed in sequence until all the liquid SF is collected 6 Until that point.
The invention has the advantages that:
SF of the present invention 6 Gas field recovery device for synchronously recovering multiple SF by adopting front-stage converging pipeline 6 SF in gas chamber of gas insulated equipment 6 Gas, SF in a plurality of gas chambers is realized 6 Synchronous gas recovery; adopts a graded pressurizing quick recovery pipeline, and according to SF 6 SF of gas chamber of gas insulation equipment 6 SF for gas chamber in stages with different pressure of gas 6 The gas is pressurized and recycled, so that the recycling speed is improved, the safety of equipment is ensured, and the electric energy is saved; residual liquid and gaseous SF in the pipeline after the operation is completed 6 Recovery is carried out, so that environmental pollution is avoided, and residual liquid SF in a pipeline is prevented 6 Gasifying and damaging the pressure of the pipeline; pressurizing by cooling the liquefied pipelineSF 6 The gas is subjected to two-stage cooling liquefaction to lead SF 6 The gas is completely liquefied, so that the storage is convenient; liquid SF is conducted through a rear-stage confluence storage pipeline 6 The continuous collection and storage of the equipment are avoided, the frequent startup and shutdown of the equipment during the on-site recovery operation are avoided, and the SF under ultra-high voltage and ultra-high voltage is greatly improved 6 SF in the engineering of trouble shooting, extension and the like of gas insulation equipment and full-closed combined electrical appliance 6 Efficiency of gas recovery.
Drawings
FIG. 1 is a block diagram of a foreline of a recovery device according to a first embodiment of the present invention;
FIG. 2 is a block diagram of a staged pressurized quick recovery circuit of a recovery device according to a first embodiment of the present invention;
FIG. 3 is a block diagram of a cooling liquefaction line and a post-confluence storage line of a recovery device according to a first embodiment of the present invention;
fig. 4 is a block diagram of a storage tank of the recovery device according to the first embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The technical scheme of the invention is further described below with reference to the attached drawings and specific embodiments:
example 1
As shown in fig. 1-4, a sectional-supercharging, continuously-stored SF 6 A gas on-site recovery device comprising: a front-stage converging pipeline, a staged pressurizing quick recovery pipeline, a cooling liquefying pipeline and a rear-stage converging storage pipeline.
As shown in fig. 1, the foreline includes: first SF 6 Gas-insulated apparatus, secondSF 6 Gas-insulated equipment, third SF 6 The gas insulation device, the third manual valve S3, the fourth manual valve S4, the fifth manual valve S5, the fourth self-sealing joint ZF4, the fifth self-sealing joint ZF5, the sixth self-sealing joint ZF6, the seventh self-sealing joint ZF7, the eighth self-sealing joint ZF8, the ninth self-sealing joint ZF9, the first pressure sensor P1, the second pressure sensor P2, the third pressure sensor P3, the first electromagnetic valve V1, the second electromagnetic valve V2, the third electromagnetic valve V3, the first convergence device HLQ1, the tenth self-sealing joint ZF10;
first SF 6 The output end of the gas insulation device is in sealing connection with one end of a third manual valve S3 through a pipeline, the other end of the third manual valve S3 is in sealing connection with a fourth self-sealing joint ZF4 through a pipeline, a high-pressure corrugated pipe is adopted to be in sealing connection between the fourth self-sealing joint ZF4 and a seventh self-sealing joint ZF7, one end of a first electromagnetic valve V1 is in sealing connection with the seventh self-sealing joint ZF7 through a pipeline, the other end of the first electromagnetic valve V1 is in sealing connection with the first input end of a first converging device HLQ1, and a first pressure sensor P1 is arranged on the pipeline between the first electromagnetic valve V1 and the seventh self-sealing joint ZF7 in a sealing manner; second SF 6 The output end of the gas insulation device is in sealing connection with one end of a fourth manual valve S4 through a pipeline, the other end of the fourth manual valve S4 is in sealing connection with a fifth self-sealing joint ZF5 through a pipeline, a high-pressure corrugated pipe is adopted to be in sealing connection between the fifth self-sealing joint ZF5 and an eighth self-sealing joint ZF8, one end of a second electromagnetic valve V2 is in sealing connection with the eighth self-sealing joint ZF8 through a pipeline, the other end of the second electromagnetic valve V2 is in sealing connection with the second input end of a first converging device HLQ1, and a second pressure sensor P2 is arranged on the pipeline between the second electromagnetic valve V2 and the eighth self-sealing joint ZF8 in a sealing manner; third SF 6 The output end of the gas insulation device is in sealing connection with one end of a fifth manual valve S5 through a pipeline, the other end of the fifth manual valve S5 is in sealing connection with a sixth self-sealing joint ZF6 through a pipeline, a high-pressure corrugated pipe is adopted between the sixth self-sealing joint ZF6 and a ninth self-sealing joint ZF9 in sealing connection, one end of a third electromagnetic valve V3 is in sealing connection with the ninth self-sealing joint ZF9 through a pipeline, the other end of the third electromagnetic valve V3 is in sealing connection with a third input end of a first converging device HLQ1, and the third electromagnetic valve V3 is in sealing connection with a third input end of a first converging device HLQ1The pressure sensor P3 is sealingly mounted on the conduit between the third solenoid valve V3 and the ninth self-sealing joint ZF 9.
As shown in fig. 2, the staged supercharging rapid recovery pipeline includes: the first self-sealing joint ZF1, the first manual valve S1, the fourth electromagnetic valve V4, the fourth pressure sensor P4, the pressure stabilizing filter GLQ, the first safety valve SV1, the sixth electromagnetic valve V6, the electromagnetic valve DV1, the vacuum compressor ZKJ, the electromagnetic valve DV2 and the first SF 6 Gas compressor QTJ, second SF 6 A gas compressor QTJ, a fifth pressure sensor P5, a sixth pressure sensor P6, a ninth solenoid valve V9, a tenth solenoid valve V10, a second safety valve SV2, an eleventh solenoid valve V11, a twelfth solenoid valve V12, a second manual valve S2, a second self-sealing joint ZF2, a seventh pressure sensor P7, a sweep gas collection tank SJG, a fifth solenoid valve V5, a seventh solenoid valve V7, a third self-sealing joint ZF3, an eighth solenoid valve V8;
the first self-sealing joint ZF1 is in pipeline sealing connection with one end of a first manual valve S1, the other end of the first manual valve S1 is in pipeline sealing connection with one end of a fourth electromagnetic valve V4, the other end of the fourth electromagnetic valve V4 is in pipeline sealing connection with the input end of a pressure stabilizing filter GLQ, the output end of the pressure stabilizing filter GLQ is in pipeline sealing connection with one end of a sixth electromagnetic valve V6, and the other end of the sixth electromagnetic valve V6 is in first SF 6 The input end of the gas compressor QTJ1 is connected by a pipeline seal, and the first SF 6 The output end of the gas compressor QTJ1 is in pipeline sealing connection with one end of a ninth electromagnetic valve V9, the other end of the ninth electromagnetic valve V9 is in pipeline sealing connection with one end of an eleventh electromagnetic valve V11, the other end of the eleventh electromagnetic valve V11 is in pipeline sealing connection with one end of a second manual valve S2, the other end of the second manual valve S2 is in pipeline sealing connection with a second self-sealing joint ZF2, one end of the electromagnetic valve DV1 is in pipeline sealing connection between a pressure stabilizing filter GLQ and a sixth electromagnetic valve V6, the other end of the electromagnetic valve DV1 is in pipeline sealing connection with the input end of a vacuum compressor ZKJ, the output end of the vacuum compressor ZKJ is in pipeline sealing connection with one end of the electromagnetic valve DV2, and the other end of the electromagnetic valve DV2 is in pipeline sealing connection with the sixth electromagnetic valve V6 and the first SF 6 Between the gas compressors QTJ1Is arranged on the pipeline of the pipeline; second SF 6 The input end of the gas compressor QTJ2 is connected with the sixth electromagnetic valve V6 and the first SF in a sealing way 6 On the pipeline between the gas compressors QTJ1, the second SF 6 The output end of the gas compressor QTJ2 is in sealing connection with one end of a tenth electromagnetic valve V10 through a pipeline, the other end of the tenth electromagnetic valve V10 is in sealing connection with a pipeline between a ninth electromagnetic valve V9 and an eleventh electromagnetic valve V11, and a sixth pressure sensor P6 is in sealing connection with the second SF 6 One end of a fifth electromagnetic valve V5 is connected between a first manual valve S1 and a fourth electromagnetic valve V4 in a sealing way through a pipeline, the other end of the fifth electromagnetic valve V5 is connected with a third self-sealing joint ZF3 in a sealing way through a pipeline, one end of a seventh electromagnetic valve V7 is connected on a pipeline between the fourth electromagnetic valve V4 and a pressure stabilizing filter GLQ in a sealing way through a pipeline, the other end of the seventh electromagnetic valve V7 is connected with the output end of a residual gas collecting tank SJG in a sealing way through a pipeline, one end of a twelfth electromagnetic valve V12 is connected on the input end of the residual gas collecting tank SJG in a sealing way through a pipeline, the other end of the twelfth electromagnetic valve V12 is connected on a pipeline between a ninth electromagnetic valve V9 and an eleventh electromagnetic valve V11 in a sealing way, and a seventh pressure sensor P7 is arranged on the top of the residual gas collecting tank SJG in a sealing way; the fourth pressure sensor P4 is arranged on the pipeline between the fourth electromagnetic valve V4 and the pressure stabilizing filter GLQ in a sealing way, the first safety valve SV1 is arranged on the pipeline between the pressure stabilizing filter GLQ and the sixth electromagnetic valve V6 in a sealing way, and the fifth pressure sensor P5 is arranged on the first SF in a sealing way 6 The gas compressor QTJ and the ninth electromagnetic valve V9 are arranged on a pipeline, the second safety valve SV2 is arranged on a pipeline between the ninth electromagnetic valve V9 and the eleventh electromagnetic valve V11 in a sealing mode, one end of the eighth electromagnetic valve V8 is connected between the first manual valve S1 and the fourth electromagnetic valve V4 in a sealing mode through the pipeline, the other end of the eighth electromagnetic valve V8 is connected between the eleventh electromagnetic valve V11 and the second manual valve S2 in a sealing mode through the pipeline, and the first self-sealing joint ZF1 and the tenth self-sealing joint ZF10 are connected in a sealing mode through a high-pressure corrugated pipe.
As shown in fig. 3, the cooling liquefaction line includes: eleventh self-sealing joint ZF11, air heat exchanger KQH, plate heat exchanger BH, twelfth self-sealing joint ZF12, the rear stage conflux storage pipeline include: thirteenth self-sealing joint ZF13, second confluence device HLQ2, thirteenth solenoid valve V13, fourteenth solenoid valve V14, fifteenth solenoid valve V15, eighth pressure sensor P8, ninth pressure sensor P9, tenth pressure sensor P10, fourteenth self-sealing joint ZF14, fifteenth self-sealing joint ZF15, sixteenth self-sealing joint ZF16;
the input end of the second converging device HLQ2 is in sealing connection with a thirteenth self-sealing joint ZF13 through a pipeline, the first output end of the second converging device HLQ2 is in sealing connection with one end of a thirteenth electromagnetic valve V13 through a pipeline, the other end of the thirteenth electromagnetic valve V13 is in sealing connection with a fourteenth self-sealing joint ZF14 through a pipeline, the fourteenth self-sealing joint ZF14 is in sealing connection with a storage tank, and an eighth pressure sensor P8 is arranged on the pipeline between the thirteenth electromagnetic valve V13 and the fourteenth self-sealing joint ZF14 in a sealing manner; the second output end of the second converging device HLQ2 is in sealing connection with one end of a fourteenth electromagnetic valve V14 through a pipeline, the other end of the fourteenth electromagnetic valve V14 is in sealing connection with a fifteenth self-sealing joint ZF15 through a pipeline, the fifteenth self-sealing joint ZF15 is in sealing connection with a storage tank, and a ninth pressure sensor P9 is arranged on the pipeline between the fourteenth electromagnetic valve V14 and the fifteenth self-sealing joint ZF15 in a sealing manner; the third output end of the second converging device HLQ2 is in sealing connection with one end of a fifteenth electromagnetic valve V15 through a pipeline, the other end of the fifteenth electromagnetic valve V15 is in sealing connection with a sixteenth self-sealing joint ZF16 through a pipeline, the sixteenth self-sealing joint ZF16 is in sealing connection with a storage tank, and a tenth pressure sensor P10 is arranged on the pipeline between the fifteenth electromagnetic valve V15 and the sixteenth self-sealing joint ZF16 in a sealing way; 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 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 by adopting a high-pressure corrugated pipe.
As shown in fig. 4, the storage tank includes: seventeenth self-sealing joint ZF17, eighteenth self-sealing joint ZF18, sixth manual valve S6, eleventh pressure sensor P11, third relief valve SV3, seventh manual valve S7, tank 10, draft tube 11, bracket 12, drain 13, weight sensor 14, and flatbed 15.
The tank body 10 is arranged on the bracket 12, the tank body 10 and the bracket 12 are placed on the 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 bracket 12; the guide pipe 11 is vertically arranged in the tank body 10, the input end of the guide pipe 11 is arranged at the top of the tank body 10 and is in sealing communication with the output end of the sixth manual valve S6 through a pipeline, the output end of the guide pipe extends to the bottom of the tank body 10, the input end of the sixth manual valve S6 is in sealing connection with the seventeenth self-sealing joint ZF17 through a pipeline, and the eleventh pressure sensor P11 is arranged on the pipeline of the output end of the sixth manual valve S6 in a sealing manner; the bottom of the tank body 10 is provided with a sewage outlet 13; the third safety valve SV3 is arranged at the top of the tank body 10 in a sealing way, the input end of the seventh manual valve S7 is connected with the top of the tank body 10 in a sealing way through a pipeline, and the output end of the seventh manual valve S7 is connected with the eighteenth self-sealing joint ZF18 in a sealing way through a pipeline; the seventeenth self-sealing joint ZF17 is used as an input end of the storage tank and is connected with an output end of the second converging device HLQ2 in a sealing mode.
Workflow process
1. Pipeline vacuumizing self-cleaning device
1) Vacuum-pumping self-cleaning device for front-stage converging pipeline
The fourth self-sealing joint ZF4 and the seventh self-sealing joint ZF7 are in sealed connection by adopting a high-pressure corrugated pipe, the fifth self-sealing joint ZF5 and the eighth self-sealing joint ZF8 are in sealed connection by adopting a high-pressure corrugated pipe, the sixth self-sealing joint ZF6 and the ninth self-sealing joint ZF9 are in sealed connection by adopting a high-pressure corrugated pipe, the tenth self-sealing joint ZF10 and the first self-sealing joint ZF1 are in sealed connection by adopting a high-pressure corrugated pipe, a vacuumizing device is in sealed connection 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, when the vacuum degree meets the requirement, the vacuumizing device is closed, 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 closed, and the vacuumizing of the front-stage confluence pipeline is finished.
2) Vacuum pumping self-cleaning device for graded pressurizing quick recovery pipeline
And the third self-sealing joint ZF3 is in sealing connection with a vacuumizing device, the fourth electromagnetic valve V4, the fifth electromagnetic valve V5, the sixth electromagnetic valve V6, the eighth electromagnetic valve V8, the ninth electromagnetic valve V9, the tenth electromagnetic valve V10, the eleventh electromagnetic valve V11, the twelfth electromagnetic valve V12, the electromagnetic valves DV1 and DV2 are opened, the vacuumizing device is started to vacuumize the graded supercharging quick recovery pipeline, when the vacuum degree meets the requirement, the vacuumizing device is closed, the fourth electromagnetic valve V4, the fifth electromagnetic valve V5, the sixth electromagnetic valve V6, the eighth electromagnetic valve V8, the ninth electromagnetic valve V9, the tenth electromagnetic valve V10, the eleventh electromagnetic valve V11, the twelfth electromagnetic valve V12, the electromagnetic valves DV1 and DV2 are closed, and the graded supercharging quick recovery pipeline is vacuumized and self-cleaning is finished.
3) Vacuumizing self-cleaning device for cooling liquefying pipeline and post-stage converging 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, the third self-sealing joint ZF3 is in sealing connection with a vacuumizing device, the second manual valve S2, the fifth electromagnetic valve V5 and the eighth electromagnetic valve V8 are opened, the vacuumizing device is started, vacuumizing is carried out on the cooling liquefaction pipeline and the rear-stage confluence storage pipeline, and 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. Graded supercharging quick recovery pipeline pair SF 6 SF in gas insulation equipment gas chamber 6 Recovery is carried out
(1) For the first SF 6 Gas-insulated equipment, third SF 6 SF in gas insulation equipment gas chamber 6 Gas half-pressure reduction recovery
Assume a first SF 6 Gas insulation device, second SF 6 Gas-insulated equipment, third SF 6 Gas insulationRated pressure value in the air chamber of the edge equipment is a, and for the second SF 6 When the gas-insulated equipment is vacuumized and overhauled, the first SF adjacent to the gas-insulated equipment needs to be overhauled 6 Gas-insulated equipment, third SF 6 SF in gas insulation equipment gas chamber 6 Gas half-pressure recovery to prevent adjacent SF 6 The pressure difference in the air chamber of the gas insulation equipment is too large, so that the safety accident of equipment damage is caused;
the half-pressure reduction recovery process 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 is opened simultaneously 6 Gas compressor QTJ, second SF 6 A gas compressor QTJ for extracting the first SF 6 Gas-insulated equipment, third SF 6 SF in gas insulation equipment gas chamber 6 When the value of the first pressure sensor P1 is reduced to a/2, the third manual valve S3 and the first electromagnetic valve V1 are closed, and the first SF is performed 6 When the gas chamber of the gas insulation equipment is half-pressure reduced, and 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 half-pressure reduction of the gas chamber of the gas insulation equipment is finished, and the first SF is closed at the moment 6 Gas compressor QTJ, second SF 6 The gas compressor QTJ2 closes the first manual valve S1 and the half-pressure reduction recovery is completed.
(2) For the second SF 6 SF in gas insulation equipment gas chamber 6 Gas negative pressure recovery
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 front-stage converging pipeline, and the grading pressurization quick 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 insulation equipment gas chamber 6 The amount of gas is large, and the first SF is started at the same time 6 Gas compressor QTJ, second SF 6 Gas and its preparation methodCompressor QTJ, co-pumping second SF 6 SF in gas insulation equipment gas chamber 6 Gas, two SF 6 The gas compressors work simultaneously, improving the recovery speed.
2) Positive pressure low recovery mode
When P4 is smaller than 0.3MPa and equal to or smaller than 0.08MPa, the second SF 6 SF in gas insulation equipment gas chamber 6 The gas quantity is reduced, and at the moment, only the first SF is started 6 Gas compressor QTJ or second SF 6 One of the gas compressors QTJ2 extracts the second SF 6 SF in gas insulation equipment gas chamber 6 Gas, only one SF is started 6 The gas compressor meets the recycling requirement, and simultaneously ensures the safety of equipment and saves electric energy.
3) Negative pressure recovery mode
When P4 is less than 0.08MPa, the second SF 6 Small amounts of SF also present in the gas chamber of a gas-insulated apparatus 6 Gas due to SF 6 The gas is greenhouse effect gas, all the gas needs to be extracted, at the moment, a sixth manual valve S6 is closed, an electromagnetic valve DV1 and an electromagnetic valve DV2 are opened, a vacuum compressor ZKJ is opened, and a first SF is opened 6 Gas compressor QTJ (or second SF) 6 Gas compressor QTJ 2), for a second SF 6 Vacuumizing the gas chamber of the gas insulation equipment, and closing the vacuum compressor ZKJ and the first SF when P2 < -0.04MPa and P4 < -0.04MPa are detected 6 Gas compressor QTJ (or second SF) 6 Gas compressor QTJ 2) and all valves are closed.
At the first SF 6 Gas compressor QTJ, second SF 6 The output end 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 QTJ, second SF 6 The pressure at the output of the gas compressor QTJ, when the first SF 6 Gas compressor QTJ, second SF 6 The output of the gas compressor QTJ2 is at an excessive pressure, even if the operation of the system is stopped, to protect the first SF 6 Gas compressor QTJ, second SF 6 A gas compressor QTJ.
3. The cooling liquefying pipeline is used for quickly pressurizing the stage by stageSF output by recovery pipeline 6 Liquefying the gas
SF to be recovered by graded supercharging quick recovery pipeline 6 The gas is sent into an air heat exchanger KQH to be cooled for the first time, and then is subjected to a plate heat exchanger (11) to be cooled for the second time, so that SF is achieved 6 The gas is completely liquefied and is convenient for storage.
4. Continuous collection and storage of post-stage confluence storage pipeline
During storage, liquid SF output by cooling liquefaction pipeline 6 The liquid SF is input from the input end of the second confluence device HLQ2, the thirteenth electromagnetic valve V13 is opened, and the liquid SF is input to the first storage tank 6 When the first storage tank is full, the fourteenth electromagnetic valve V14 is opened, and the liquid SF is input into the second storage tank 6 The first storage tank is replaced at this time, when the second storage tank is full, the fifteenth electromagnetic valve V15 is opened, and the liquid SF is input into the third storage tank 6 At this time, the second storage tank is replaced, and the operation is continuously and circularly performed in sequence until all the liquid SF is collected 6 So as to solve the problem of frequent startup and shutdown of equipment during the on-site recovery operation, and realize the liquid SF 6 Is stored in a continuous collection.
5. Residual SF in pipeline 6 Recovery of gases
SF 6 After all the materials are collected and stored, the first electromagnetic valve V1, the second electromagnetic valve V2, the third electromagnetic valve V3, the first manual valve S1, the fourth electromagnetic valve V4, the sixth electromagnetic valve V6, the eighth electromagnetic valve V8, the ninth electromagnetic valve V9, the twelfth electromagnetic valve V12 and the second manual valve S2 are opened, and the first SF is opened 6 The gas compressor QTJ is used for the SF remained in each pipeline 6 Recovering the gas and residual SF 6 The gas enters a residual gas collection tank SJG through a twelfth electromagnetic valve V12 for storage, and after the residual gas is recovered, the first SF is closed 6 A gas compressor QTJ and respective valves; in the positive pressure low recovery mode, the seventh electromagnetic valve V7 is opened to realize SF in the residual gas collection tank SJG 6 And (5) recovering the gas.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. Sectional type supercharged and continuously stored SF 6 A gas field recovery device, comprising: a front-stage converging pipeline, a staged pressurizing quick recovery pipeline, a cooling liquefying pipeline, a rear-stage converging storage pipeline and a plurality of storage tanks; the input end of the front-stage converging pipeline and a plurality of SF 6 The gas chamber of the gas insulation device is in sealing connection, the output end of the front-stage converging pipeline is in sealing connection with the input end of the staged supercharging rapid recovery pipeline, the output end of the staged supercharging rapid recovery pipeline is in sealing connection with the input end of the cooling liquefaction pipeline, the output end of the cooling liquefaction pipeline is in sealing connection with the input end of the rear-stage converging storage pipeline, and the output end of the rear-stage converging storage pipeline is in sealing connection with a plurality of storage tanks; the front-stage confluence pipeline is used for synchronously recycling a plurality of SF 6 SF in gas chamber of gas insulated equipment 6 A gas; the grading pressurization quick recovery pipeline is used for carrying out SF (sulfur hexafluoride) treatment 6 SF of gas chamber of gas insulation equipment 6 SF for gas chamber in stages with different pressure of gas 6 The gas is pressurized and recovered, and residual liquid and gaseous SF in the pipeline is carried out after the operation is finished 6 Recovering the gas; the cooling and liquefying pipeline is used for pressurizing SF 6 Two-stage cooling and liquefying of the gas; the rear-stage confluence storage pipeline is used for liquid SF 6 Is continuously collected and stored;
the preceding stage confluence pipeline include: a plurality of communication pipelines 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 communication pipelines correspond to a plurality of SF 6 The air chambers of the gas insulation equipment are connected in a sealing way, and the output ends of a plurality of communication pipelines are correspondingly connected with the first confluence device HLQ1The input ends are connected in a sealing way; the output end of the first converging device HLQ1 is in sealing connection with the input end of the graded supercharging quick recovery pipeline; each communicating pipe is provided with a valve and a pressure sensor;
the quick recovery pipeline of hierarchical pressure boost include: the first self-sealing joint ZF1, the first manual valve S1, the fourth electromagnetic valve V4, the fourth pressure sensor P4, the pressure stabilizing filter GLQ, the first safety valve SV1, the sixth electromagnetic valve V6, the electromagnetic valve DV1, the vacuum compressor ZKJ, the electromagnetic valve DV2 and the first SF 6 Gas compressor QTJ, second SF 6 A gas compressor QTJ, a fifth pressure sensor P5, a sixth pressure sensor P6, a ninth solenoid valve V9, a tenth solenoid valve V10, a second safety valve SV2, an eleventh solenoid valve V11, a twelfth solenoid valve V12, a second manual valve S2, a second self-sealing joint ZF2, a seventh pressure sensor P7, a sweep gas collection tank SJG, a fifth solenoid valve V5, a seventh solenoid valve V7, a third self-sealing joint ZF3, an eighth solenoid 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 pressure stabilizing filter GLQ, the output end of the pressure 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 a first SF 6 The input end of the gas compressor QTJ1 is connected in a sealing way, and the first SF is 6 The output end of the gas compressor QTJ1 is in sealing connection with one end of a ninth electromagnetic valve V9, the other end of the ninth electromagnetic valve V9 is in sealing connection with one end of an eleventh electromagnetic valve V11, the other end of the eleventh electromagnetic valve V11 is in sealing connection with one end of a second manual valve S2, the other end of the second manual valve S2 is in sealing connection with a second self-sealing joint ZF2, one end of the electromagnetic valve DV1 is in sealing connection between a pressure stabilizing filter GLQ and a sixth electromagnetic valve V6, the other end of the electromagnetic valve DV1 is in sealing connection with the input end of a 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 piping between the gas compressors QTJ 1; second SF 6 Gas pressureThe input end of the compressor QTJ is connected with the sixth electromagnetic valve V6 and the first SF in a sealing way 6 On the pipeline between the gas compressors QTJ1, the second SF 6 The output end of the gas compressor QTJ2 is in sealing connection with one end of a tenth electromagnetic valve V10, the other end of the tenth electromagnetic valve V10 is in sealing connection with a pipeline between a ninth electromagnetic valve V9 and an eleventh electromagnetic valve V11, and a sixth pressure sensor P6 is in sealing connection with the second SF 6 One end of a fifth electromagnetic valve V5 is connected between the first manual valve S1 and the fourth electromagnetic valve V4 in a sealing way, the other end of the fifth electromagnetic valve V5 is connected with a third self-sealing joint ZF3 in a sealing way, one end of a seventh electromagnetic valve V7 is connected on the pipeline between the fourth electromagnetic valve V4 and a pressure stabilizing filter GLQ in a sealing way, the other end of the seventh electromagnetic valve V7 is connected with the output end of a residual gas collection tank SJG in a sealing way, one end of a twelfth electromagnetic valve V12 is connected on the input end of the residual gas collection tank SJG in a sealing way, the other end of the twelfth electromagnetic valve V12 is connected on the pipeline between a ninth electromagnetic valve V9 and an eleventh electromagnetic valve V11 in a sealing way, and a seventh pressure sensor P7 is arranged on the top of the residual gas collection tank SJG in a sealing way; the fourth pressure sensor P4 is arranged on the pipeline between the fourth electromagnetic valve V4 and the pressure stabilizing filter GLQ in a sealing way, the first safety valve SV1 is arranged on the pipeline between the pressure stabilizing filter GLQ and the sixth electromagnetic valve V6 in a sealing way, and the fifth pressure sensor P5 is arranged on the first SF in a sealing way 6 The gas compressor QTJ is arranged on a pipeline between the gas compressor QTJ and the ninth electromagnetic valve V9, the second safety valve SV2 is arranged on a pipeline between the ninth electromagnetic valve V9 and the eleventh electromagnetic valve V11 in a sealing way, one end of the eighth electromagnetic valve V8 is connected between the first manual valve S1 and the fourth electromagnetic valve V4 in a sealing way, the other end of the eighth electromagnetic valve V8 is connected between the eleventh electromagnetic valve V11 and the second manual valve S2 in a sealing way, and the first self-sealing joint ZF1 is connected with the output end of the first converging device HLQ1 in a sealing way through a high-pressure bellows;
The cooling and liquefying pipeline comprises: eleventh self-sealing joint ZF11, air heat exchanger KQH, plate heat exchanger BH, twelfth self-sealing joint ZF12; the rear-stage confluence storage pipeline comprises: thirteenth self-sealing joint ZF13, second confluence device HLQ2, thirteenth solenoid valve V13, fourteenth solenoid valve V14, fifteenth solenoid valve V15, eighth pressure sensor P8, ninth pressure sensor P9, tenth pressure sensor P10, fourteenth self-sealing joint ZF14, fifteenth self-sealing joint ZF15, sixteenth self-sealing joint ZF16; the eleventh self-sealing joint ZF11 is in sealing connection with the second self-sealing joint ZF2 by adopting 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 is in sealing connection with the thirteenth self-sealing joint ZF13 by adopting a high-pressure corrugated pipe; the first output end of the second confluence device HLQ2 is in sealing connection with one end of a thirteenth electromagnetic valve V13, the other end of the thirteenth electromagnetic 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 arranged on a pipeline between the thirteenth electromagnetic valve V13 and the fourteenth self-sealing joint ZF14 in a sealing manner; the second output end of the second converging device HLQ2 is in sealing connection with one end of a fourteenth electromagnetic valve V14, the other end of the fourteenth electromagnetic valve V14 is in sealing connection with a fifteenth self-sealing joint ZF15, the fifteenth self-sealing joint ZF15 is in sealing connection with a storage tank, and a ninth pressure sensor P9 is arranged on a pipeline between the fourteenth electromagnetic valve V14 and the fifteenth self-sealing joint ZF15 in a sealing manner; the third output end of the second converging 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 arranged on a pipeline between the fifteenth electromagnetic valve V15 and the sixteenth self-sealing joint ZF16 in a sealing manner;
The storage tank includes: seventeenth self-sealing joint ZF17, eighteenth self-sealing joint ZF18, sixth manual valve S6, eleventh pressure sensor P11, third safety valve SV3, seventh manual valve S7, tank (10), draft tube (11), bracket (12), drain outlet (13), weight sensor (14), flatbed (15); the tank body (10) is arranged on the bracket (12), the tank body (10) and the bracket (12) are placed on the 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 bracket (12); the honeycomb duct (11) is vertically arranged in the tank body (10), the input end of the honeycomb duct (11) is arranged at the top of the tank body (10) and is communicated with the output end of the sixth manual valve S6 in a sealing way through a pipeline, the output end of the honeycomb duct extends to the bottom of the tank body (10), the input end of the sixth manual valve S6 is connected with the seventeenth self-sealing joint ZF17 in a sealing way through a pipeline, and the eleventh pressure sensor P11 is arranged on the pipeline of the output end of the sixth manual valve S6 in a sealing way; a drain outlet (13) is arranged at the bottom of the tank body (10); the third safety valve SV3 is arranged at the top of the tank body (10) in a sealing way, the input end of the seventh manual valve S7 is connected with the top of the tank body (10) in a sealing way through a pipeline, and the output end of the seventh manual valve S7 is connected with the eighteenth self-sealing joint ZF18 in a sealing way through a pipeline; the seventeenth self-sealing joint ZF17 is used as an input end of the storage tank and is connected with an output end of the second converging device HLQ2 in a sealing mode.
2. The staged supercharging of claim 1, continuously stored SF 6 The gas field recovery device is characterized in that the pipeline is vacuumized and self-cleaned before the device is used, and the method comprises the following steps:
1) Vacuum-pumping self-cleaning device for front-stage converging pipeline
The fourth self-sealing joint ZF4 and the seventh self-sealing joint ZF7 are in sealed connection by adopting a high-pressure corrugated pipe, the fifth self-sealing joint ZF5 and the eighth self-sealing joint ZF8 are in sealed connection by adopting a high-pressure corrugated pipe, the sixth self-sealing joint ZF6 and the ninth self-sealing joint ZF9 are in sealed connection by adopting a high-pressure corrugated pipe, the tenth self-sealing joint ZF10 and the first self-sealing joint ZF1 are in sealed connection by adopting a high-pressure corrugated pipe, a vacuumizing device is in sealed connection at the third self-sealing joint ZF3, 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 are opened, vacuumizing is started for a front-stage confluence pipeline, when the vacuum degree meets the requirement, the vacuumizing device is closed, 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 closed, and the front-stage confluence pipeline is vacuumized;
2) Vacuum pumping self-cleaning device for graded pressurizing quick recovery pipeline
The third self-sealing joint ZF3 is connected with a vacuumizing device in a sealing way, 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 to vacuumize the graded supercharging quick recovery pipeline, when the vacuum degree meets the requirement, the vacuumizing device is closed, the fourth electromagnetic valve V4, the fifth electromagnetic valve V5, the sixth electromagnetic valve V6, the eighth electromagnetic valve V8, the ninth electromagnetic valve V9, the tenth electromagnetic valve V10, the eleventh electromagnetic valve V11, the twelfth electromagnetic valve V12, the electromagnetic valves DV1 and DV2 are closed, and the graded supercharging quick recovery pipeline is vacuumized and self-cleaning is finished;
3) Vacuumizing self-cleaning device for cooling liquefying pipeline and post-stage converging 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, the third self-sealing joint ZF3 is in sealing connection with a vacuumizing device, the second manual valve S2, the fifth electromagnetic valve V5 and the eighth electromagnetic valve V8 are opened, the vacuumizing device is started, vacuumizing is carried out on the cooling liquefaction pipeline and the rear-stage confluence storage pipeline, and 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.
3. A staged supercharging according to claim 2, continuously stored SF 6 The gas field recovery device is characterized in that the device is based on SF 6 SF of gas chamber of gas insulation equipment 6 SF for gas chamber in stages with different pressure of gas 6 The flow of pressurizing and recycling the gas is as follows:
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 front-stage confluence pipeline, and the three working modes are divided according to different measured pressure levels:
1) Positive pressure high recovery mode: when P4 is greater than or equal to the first thresholdWhen the value is at the same time, the first SF is started 6 Gas compressor QTJ, second SF 6 Gas compressor QTJ, co-pumping SF 6 SF in gas insulation equipment gas chamber 6 A gas;
2) Positive pressure low recovery mode: when P4 is smaller than the first threshold and larger than or equal to the second threshold, only the first SF is started 6 Gas compressor QTJ or second SF 6 One of the gas compressors QTJ2 extracts SF 6 SF in gas insulation equipment gas chamber 6 A gas;
3) Negative pressure recovery mode: when P4 is smaller than the second threshold, the sixth manual valve S6 is closed, the solenoid valves DV1 and DV2 are opened, the vacuum compressor ZKJ is opened, and the first SF is opened 6 Gas compressor QTJ or second SF 6 Gas compressor QTJ, for SF 6 And vacuumizing the gas chamber of the gas insulation equipment.
4. A staged supercharging according to claim 3, continuously stored SF 6 The gas on-site recovery device is characterized in that the liquid SF and the gaseous SF remained in the pipeline after the operation is finished 6 The recovery process is as follows: SF (sulfur hexafluoride) 6 After all the materials are collected and stored, the first electromagnetic valve V1, the second electromagnetic valve V2, the third electromagnetic valve V3, the first manual valve S1, the fourth electromagnetic valve V4, the sixth electromagnetic valve V6, the eighth electromagnetic valve V8, the ninth electromagnetic valve V9, the twelfth electromagnetic valve V12 and the second manual valve S2 are opened, and the first SF is opened 6 The gas compressor QTJ is used for the SF remained in each pipeline 6 Recovering the gas and residual SF 6 The gas enters a residual gas collection tank SJG through a twelfth electromagnetic valve V12 for storage, and residual SF is remained 6 After the gas recovery is completed, the first SF is closed 6 A gas compressor QTJ and respective valves; in the positive pressure low recovery mode, the seventh electromagnetic valve V7 is opened to realize SF in the residual gas collection tank SJG 6 And (5) recovering the gas.
5. The staged supercharging of claim 4, continuously stored SF 6 The gas on-site recovery device is characterized in that SF 6 The flow of two-stage cooling liquefaction of the gas is as follows: SF (sulfur hexafluoride) for recycling pressurization through graded pressurization quick recycling pipeline 6 The gas is sent into an air heat exchanger KQH to be cooled for the first time, and then is subjected to a plate heat exchanger (11) to be cooled for the second time, so that SF is achieved 6 The gas is completely liquefied.
6. The staged supercharging of claim 5, continuously stored SF 6 The gas field recovery device is characterized in that the liquid SF 6 The flow of the continuous collection and storage of the (c) is as follows: liquid SF output by cooling liquefaction pipeline 6 The liquid SF is input from the input end of the second confluence device HLQ2, the thirteenth electromagnetic valve V13 is opened, and the liquid SF is input to the first storage tank 6 When the first storage tank is full, the fourteenth electromagnetic valve V14 is opened, and the liquid SF is input into the second storage tank 6 The first storage tank is replaced at this time, when the second storage tank is full, the fifteenth electromagnetic valve V15 is opened, and the liquid SF is input into the third storage tank 6 At this time, the second storage tank is replaced, and the operation is continuously and circularly performed in sequence until all the liquid SF is collected 6 Until that point.
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