CN106823871B - Gas separation recovery system and gas circuit for mixed gas experiment - Google Patents
Gas separation recovery system and gas circuit for mixed gas experiment Download PDFInfo
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- CN106823871B CN106823871B CN201710074424.6A CN201710074424A CN106823871B CN 106823871 B CN106823871 B CN 106823871B CN 201710074424 A CN201710074424 A CN 201710074424A CN 106823871 B CN106823871 B CN 106823871B
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- 238000000926 separation method Methods 0.000 title claims abstract description 90
- 238000002474 experimental method Methods 0.000 title claims abstract description 40
- 238000011084 recovery Methods 0.000 title claims abstract description 25
- 238000002156 mixing Methods 0.000 claims abstract description 35
- 238000011144 upstream manufacturing Methods 0.000 claims description 16
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 claims description 15
- 229910018503 SF6 Inorganic materials 0.000 claims description 14
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 14
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 398
- 239000003595 mist Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
- B01F23/19—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/80—After-treatment of the mixture
- B01F23/806—Evaporating a carrier, e.g. liquid carbon dioxide used to dissolve, disperse, emulsify or other components that are difficult to be mixed; Evaporating liquid components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/80—After-treatment of the mixture
- B01F23/807—Extracting components from the mixture, e.g. by adsorption, absorption or distillation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/80—After-treatment of the mixture
- B01F23/808—Filtering the mixture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2113—Pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
- B01F35/883—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using flow rate controls for feeding the substances
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/90—Heating or cooling systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/2204—Mixing chemical components in generals in order to improve chemical treatment or reactions, independently from the specific application
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a gas separation and recovery system and a gas path for mixed gas experiments, the gas separation and recovery system comprises a gas separation pipeline, a gas separation device arranged on the gas separation pipeline and separated gas storage tanks for storing each separated gas, each separated gas storage tank is provided with a gas storage tank inlet pipeline for communicating with a gas storage tank of a gas supply system or each separated gas storage tank is communicated with a gas mixing tank together, the gas mixing tank is provided with a mixed gas experimental facility communication pipeline for communicating with mixed gas experimental facilities, when the experiment needs mixed gas with different proportions, the mixed gas is separated and purified by a gas separation and recovery system and is respectively stored in corresponding separated gas storage tanks, the gas source can be used as the gas source of each pure gas for the next mixed gas experiment, so that the experiment cost is greatly reduced, and the environment is not polluted.
Description
Technical Field
The invention relates to a gas separation and recovery system and a gas circuit for mixed gas experiments.
Background
In the mixed gas circuit breaker, the performance of the mixed gas has a crucial influence on the circuit breaker, so experimental research on the performance of the mixed gas is focused. In the mixed gas experimental research, mixed gases with different mixing ratios need to be prepared, the currently commonly used gas path for mixed gas experiments mostly adopts a means of combining a main gas flow path and an additional gas flow path, the additional gas is added into the main gas, and the mixed gas is generated by mixing the main gas and the additional gas, but the subsequent mixed gas recovery treatment is lacked, particularly for some special gases, such as sulfur hexafluoride gas, the greenhouse effect is serious, the Global Warming Potential (GWP) of the sulfur hexafluoride gas is 23900 times of that of the CO2 gas, and when the abating gases with different ratios need to be replaced, the mixed gas is discharged into the atmosphere, so that the serious greenhouse effect is caused. Chinese patent application with application publication No. CN 105699366A describes a plasma spectrum measurement device and method for SF6 mixed gas, comprising a gas supply system with a gas storage tank, wherein the gas supply system comprises an SF6 gas cylinder, another gas cylinder and a gas circuit for connecting the gas cylinders and the gas storage tank, the gas storage tank is provided with a gas outlet and a gas return opening, the gas return opening is communicated with mixed gas experimental equipment through a recovery pipeline, the gas outlet is communicated with the mixed gas experimental equipment through a gas inlet pipeline, the recovery pipeline and the gas inlet pipeline share one end of a compression pipeline, a compressor is arranged on the compression pipeline, the gas storage tank is used for fully mixing the gas before the experiment and storing the mixed gas after the experiment, when the mixed gas with different proportions needs to be replaced, the gas recovered in the gas storage tank needs to be emptied and mixed again according to the required proportions by the gas in the two gas cylinders, the mixed gas after the experiment is finished can not be recycled, so that the waste of the experimental gas is caused, and the experiment cost is improved.
Disclosure of Invention
The invention aims to provide a gas circuit for mixed gas experiments, which aims to solve the problems that in the prior art, when mixed gas with different proportions is needed, the mixed gas after the previous experiment cannot be recycled, so that gas is wasted and the cost is high; meanwhile, the invention also aims to provide a gas separation and recovery system used by the gas circuit for the mixed gas experiment.
In order to achieve the purpose, the technical scheme of the gas separation and recovery system is as follows: the utility model provides a gas separation recovery system, includes the gas separation pipeline, sets up the gas separation device on the gas separation pipeline and is used for depositing the gaseous separation gas storage tank of each gas after the separation, and each separation gas is equipped with the gas holder air inlet pipeline that is used for with gas supply system's gas holder intercommunication or each separation gas storage tank and communicates jointly has the gas mixing tank, is equipped with the mixed gas experimental facilities intercommunication pipeline that is used for with mixed gas experimental facilities intercommunication on the gas mixing tank.
The gas separation device is a cryogenic rectification device.
And a gas collecting tank for collecting the mixed gas in the mixed gas experimental device and/or the gas storage tank before separation is arranged at the upstream of the gas separation device on the gas separation pipeline.
And a mixing pipeline with two ends communicated with the gas mixing tank is arranged on the gas mixing tank, and a gas mixing compressor is arranged on the mixing pipeline.
The technical scheme of the gas circuit for the mixed gas experiment is as follows: the utility model provides a gas circuit for gas mixture experiment, including the gas supply system who has the gas holder, still include gas separation recovery system, gas separation recovery system includes the gas separation pipeline, set up the gas separation device on the gas separation pipeline and be used for depositing the separation gas storage tank of each gas after the separation, be equipped with on each separation gas storage tank with the gas holder air inlet pipe way of gas supply system's gas holder intercommunication or each separation gas storage tank common intercommunication have the gas mixing tank, be equipped with on the gas mixing tank be used for with the mixed gas experimental facilities intercommunication pipeline of mixed gas experimental facilities intercommunication.
The gas separation device is a cryogenic rectification device.
The gas supply system further comprises at least two gas cylinders for storing different gases, each gas cylinder is communicated with a corresponding gas storage tank gas inlet pipeline through a three-way joint, a gas cylinder switch valve is arranged at an outlet of each gas cylinder, and switch valves are arranged at the other two ends of the three-way joint on the gas storage tank gas inlet pipeline.
And a gas collecting tank for collecting the mixed gas in the mixed gas experimental device and/or the gas storage tank before separation is arranged at the upstream of the gas separation device on the gas separation pipeline.
And a gas separation compressor is arranged between each separated gas storage tank and the gas separation device.
And a mixing pipeline is arranged on the gas storage tank, both ends of the mixing pipeline are communicated with the gas storage tank, and the mixing pipeline is used for fully mixing the mixed gas in the gas storage tank and is provided with a gas mixing compressor.
The invention has the beneficial effects that: when the experiment needs the mist of different proportions, separate the purification with the mist through gas separation recovery system to leave respectively in the separation gas that corresponds deposits the gas pitcher, each separation gas deposits the gas pitcher and passes through gas pitcher and mist experimental apparatus intercommunication or each separation gas deposits the gas pitcher and gas supply system's gas holder intercommunication, can regard as the gas supply use of pure gas separately for the experiment of next mist, greatly reduced the experiment cost, and can not the polluted environment.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a gas circuit for a mixed gas experiment according to the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. The specific embodiment of the gas circuit for mixed gas experiments, which is disclosed by the invention, takes sulfur hexafluoride gas and carbon tetrafluoride gas as examples, and comprises a gas supply system and a gas separation and recovery system, wherein the gas supply system comprises a gas storage tank 1, a gas supply pipeline, a first gas bottle 17 for containing sulfur hexafluoride gas, a second gas bottle 16 for containing carbon tetrafluoride gas, gas inlet pipelines (14, 15) of the gas storage tank, a gas return pipeline and a mixing pipeline 5, as shown in fig. 1. Gas holder 1 has return air port 3, gas outlet 2 and two air inlets, gas supply line one end communicates with 2 of the gas outlet of gas holder 1, one end and mixed gas experimental facilities 9 intercommunication, be equipped with first compressor 6 and condenser 7 on the gas supply line, the gas supply line is in the low reaches of condenser 7 and 3 intercommunications of return air port of gas holder 1, the gas in the gas holder 1 can come out by 2 of the gas outlet of gas holder 1 this moment and get back to in the gas holder 1 by return air port 3 through compressor 6 and condenser 7, the bottom of gas holder 1 is located to gas outlet 2, return air port 3 locates the top of gas holder 1, can make not have intensive mixing in the gas holder 1 like this and be located the heavier gas remix of gas holder lower part, guarantee the abundant flash mixed of carbon tetrafluoride and. A first switch valve 8 is arranged on the downstream of the gas outlet 2 of the gas storage tank 1 on the gas supply pipeline, a second switch valve 4 is arranged on the upstream of the gas return port 3 on the gas supply pipeline, the first switch valve 8, the second switch valve 4, the first compressor 6, the condenser 7 and gas channels between the first compressor 6 and the condenser form a mixing pipeline, and at the moment, the first compressor 6 is also a gas mixing compressor.
The mixed gas experimental equipment 9 is connected with the gas circuit for the mixed gas experiment through a pipeline joint 10, one end of the gas return pipeline is communicated with the gas supply pipeline, the other end of the gas return pipeline is communicated with the gas return port 3 of the gas storage tank 1, the gas return pipeline and the mixed pipeline share a compression pipeline formed by the first compressor 6 and the condenser 7, the gas return pipeline is provided with a third switch valve 12 and a gas return filtering device 13, and the gas supply pipeline is provided with a fourth switch valve 11 between the pipeline joint 10 and the third switch valve 12. An intermediate pipeline is arranged between the air supply pipeline and the air return pipeline, one end of the intermediate pipeline is communicated with the air supply pipeline, the other end of the intermediate pipeline is communicated with the upstream of the first compressor 6, and a fifth switch valve 40 is arranged on the intermediate pipeline. The function of the intermediate pipeline is to discharge a small amount of the mixed gas into the intermediate pipeline when the gas in the gas supply pipeline is slightly excessive.
The gas separation and recovery system comprises a gas separation pipeline 18, a gas separation device arranged on the gas separation pipeline 15 and a separated gas storage tank for storing each separated gas. One end of the gas separation pipeline 18 is communicated with a gas supply pipeline, the gas supply pipeline is provided with a connection part A connected with gas separation management, a sixth switch valve 42 is arranged on the upstream of the connection part A on the gas supply pipeline, and a seventh switch valve 41 is arranged between the upstream of the middle pipeline and the downstream of the connection part A on the gas supply pipeline. The air supply pipeline is provided with a first measuring pipeline, and the first measuring pipeline is provided with a thermocouple vacuum gauge 38 and a thermocouple vacuum gauge switch valve 39.
The gas separation device is a cryogenic rectification device 19, the separated gas storage tank comprises a first gas storage tank 33 and a second gas storage tank 26, a first gas separation compressor 32 and an eighth switch valve 31 are arranged between the first gas storage tank 33 and the cryogenic rectification device 19, the first gas separation compressor 32, the eighth switch valve 31 and corresponding pipelines form a first separation branch, a second gas separation compressor 25 and a ninth switch valve 24 are arranged between the second gas storage tank 26 and the cryogenic rectification device 19, and the second gas separation compressor 25, the ninth switch valve 24 and corresponding pipelines form a second separation branch. A mixed gas filtering device 46 is arranged on the gas separation pipeline 18 at the upstream of the cryogenic rectification device 19, a gas collecting tank 23 is arranged on the gas separation pipeline 18 at the upstream of the mixed gas filtering device 46, a tenth switch valve 21 is arranged on the gas separation pipeline 18 between the gas collecting tank 23 and the mixed gas filtering device 46, and an eleventh switch valve 45 and a twelfth switch valve 43 are arranged on the gas separation pipeline 18 at the upstream of the gas collecting tank 23. The first gas storage tank 33 is communicated with the gas storage tank 1 through the first gas storage tank inlet pipeline 14, the second gas storage tank 26 is communicated with the gas storage tank 1 through the second gas storage tank inlet pipeline 15, the first gas bottle 17 is communicated with the first gas storage tank inlet pipeline 14, the outlet of the first gas bottle 17 is provided with a first gas bottle switch valve 37, the first gas storage tank inlet pipeline 14 is provided with a thirteenth switch valve 36 and a fourteenth switch valve 35 at two sides of the first gas bottle 17, the first gas storage tank inlet pipeline 14 is provided with a first flow meter 34 at the downstream of the first gas bottle switch valve 37 and the thirteenth switch valve 36 and at the upstream of the fourteenth switch valve 35, the second gas bottle 16 is communicated with the second gas storage tank pipeline 15, the outlet of the second gas bottle 16 is provided with a second gas bottle switch valve 30, the second gas storage tank inlet pipeline 15 is provided with a fifteenth switch valve 28 and a sixteenth switch valve 29 at two sides of the second gas bottle 16, the second gas storage tank inlet pipeline 15 is provided with the downstream of the second gas bottle switch valve 30 and the fifteenth switch valve 28 and at the downstream of Upstream of the sixteen switching valves 29, a second flow meter 27 is provided. The gas storage tank 1 is provided with a gas storage tank pressure gauge.
The other end of the gas separation pipeline 18 is provided with a vacuum pump 22, a vacuum pump switch valve 48 and a vacuumizing filter device 47 are arranged on the gas separation pipeline 18 at the upstream of the vacuum pump 22, a vacuum gauge 20 is further arranged on the gas separation pipeline 18, and a gas separation pipeline pressure gauge 44 is arranged on the gas separation pipeline 18 between an eleventh switch valve 45 and a twelfth switch valve 43. The gas separation line 18, which is now provided with a vacuum pump 22, simultaneously forms a vacuum line.
The experimental gas circuit has the following working processes and functions:
(1) and vacuumizing an experimental gas circuit. Opening a vacuum pump 22, a vacuum pump switch valve 48, an eleventh switch valve 45, a tenth switch valve 21, a twelfth switch valve 43, a sixth switch valve 42, a second switch valve 4 and a fifth switch valve 40, closing the pipeline interface 10 on the experimental equipment pipeline, opening a thermocouple vacuum gauge switch valve 39 when the pressure measured by the vacuum gauge 20 is zero, detecting the vacuum degree by using a thermocouple vacuum gauge 38, closing the thermocouple vacuum gauge switch valve 39 after the pointer of the thermocouple vacuum gauge 38 is stabilized, and closing the sixth switch valve 42, the twelfth switch valve 43, the second switch valve 4, the eleventh switch valve 45, the tenth switch valve 21, the fifth switch valve 40, the vacuum pump switch valve 48 and a vacuum pump B3. Because the vacuum pump B3 can not completely pump out the other gases in the gas storage tank 1 and each pipeline, the replacement of the gases is required, the second gas cylinder switch valve 30 and the sixteenth switch valve 29 are opened, the second gas cylinder 16 fills the carbon tetrafluoride gas into the gas storage tank 1 for gas replacement, and the above vacuumizing step is repeated, the carbon tetrafluoride gas is absorbed by the vacuumizing filter device 47 when passing through the outlet of the vacuumizing discharge pipeline, so that after twice ventilation, the gas storage tank 1 and each pipeline are vacuumized again, at this time, other gases are completely removed except a little residual carbon tetrafluoride gas in the gas storage tank 1 and each pipeline, and the influence on the experimental result is very small.
(2) And vacuumizing the gas separation and recovery system. The vacuum pump 22, the vacuum pump switching valve 48, the eighth switching valve 31, and the ninth switching valve 24 are turned on, and when the pressure measured by the vacuum gauge 20 shows zero, gas replacement is performed. And opening a thirteenth switch valve 36, a first gas cylinder switch valve 37, a fifteenth switch valve 28 and a second gas cylinder switch valve 30 on the first gas cylinder to perform gas replacement on the gas extraction separation pipeline, repeating the above vacuumizing steps, absorbing sulfur hexafluoride gas and carbon tetrafluoride gas by a vacuumizing filter device 47 when the sulfur hexafluoride gas and the carbon tetrafluoride gas pass through an outlet of a vacuumizing discharge pipeline, repeatedly ventilating twice, vacuumizing the first gas storage tank 33, the second gas storage tank 26 and each pipeline again, and leaving little sulfur hexafluoride gas and carbon tetrafluoride gas in the first gas storage tank 33 and the second gas storage tank 26 respectively at the moment, so that the experimental result is not influenced.
(3) And (4) mixing the gases. And opening the first gas cylinder switch valve 37, the second gas cylinder switch valve 30, the fourteenth switch valve 35 and the sixteenth switch valve 29, filling the mixed gas into the gas storage tank 1, controlling the mixing proportion of the mixed gas through the first flow meter 34 and the second flow meter 27, and when the pressure gauge of the gas storage tank reaches a set value, namely the gas quantity in the gas storage tank 1 reaches the requirement. The fourteenth on-off valve 35, the sixteenth on-off valve 29, the first cylinder on-off valve 37, and the second cylinder on-off valve 30 are closed. Open first ooff valve 8, second ooff valve 4, start the gas mixture compressor, the gas outlet 2 of the heavier composition of gas mixture by gas holder 1 below flows through the gas mixture compressor in 1, gets back to 1 by 1 top gas return port 3 of gas holder in, realizes gaseous flash mixed, mixes the back, closes the gas mixture compressor to close first ooff valve 8, second ooff valve 4, gas mixing accomplishes.
(4) And vacuumizing the mixed gas experimental equipment. And opening the fourth switch valve 11, the seventh switch valve 41, the eleventh switch valve 45, the tenth switch valve 21, the twelfth switch valve 43, the vacuum pump switch valve 48 and the vacuum pump 22, connecting the pipeline joint 10, opening the thermocouple vacuum gauge switch valve 39 when the vacuum gauge 20 points to-0.1, observing the indication number of the thermocouple vacuum gauge 38, and closing the fourth switch valve 11, the seventh switch valve 41, the eleventh switch valve 45, the tenth switch valve 21, the twelfth switch valve 43, the vacuum pump switch valve 48 and the vacuum pump 22 after the thermocouple vacuum gauge 38 is stabilized below 20Pa to finish the vacuumizing of the mixed gas experimental equipment.
(5) And pressurizing and inflating the mixed gas experimental equipment. And opening the first switch valve 8, the sixth switch valve 42, the seventh switch valve 41, the twelfth switch valve 43, the fourth switch valve 11 and the mixed gas compressor, filling the mixed gas in the gas storage tank 1 into the mixed gas experiment equipment 9, and closing the first switch valve 8, the sixth switch valve 42, the seventh switch valve 41, the twelfth switch valve 43, the fourth switch valve 11 and the mixed gas compressor when the indication of the gas separation pipeline pressure gauge 44 reaches a set value, wherein redundant gas is still stored in the gas storage tank 1. If the gas storage tank 1 discharges a little more gas into the gas supply pipeline, the fifth switch valve 40 can be opened at this time, the little more gas mixture is let into the gas return intermediate pipeline, and then the fifth switch valve 40 is closed.
(6) And recovering the mixed gas in the mixed gas experimental equipment. After the experiment is completed, the fourth switch valve 11, the third switch valve 12, the second switch valve 4 and the mixed gas compressor are sequentially opened, the mixed gas after the experiment in the mixed gas experiment equipment is recycled into the gas storage tank 1 by the mixed gas compressor, then the fourth switch valve 11, the third switch valve 12, the second switch valve 4 and the mixed gas compressor are closed, the gas recycling process is completed, and the mixed gas is used for the next experiment. The mixed gas is fully mixed by the mixed gas compressor before entering the mixed gas experimental equipment in the next use, so that the problem of inaccurate experimental result caused by layering due to the fact that the mixed gas is statically placed in the mixed gas experimental equipment for a long time is solved. In the mixed gas recovery process, the return gas filtering device 13 may filter and absorb other toxic gases or impurities except sulfur hexafluoride gas and carbon tetrafluoride gas.
(7) And purifying and separating the mixed gas. And after the experiment is finished, when the proportion of the mixed gas needs to be changed or the impurity components in the mixed gas are more, purifying and separating the mixed gas. Opening a fourth switch valve 11, a fifth switch valve 40, a sixth switch valve 42, a mixed gas compressor, a twelfth switch valve 43 and an eleventh switch valve 45, recycling the mixed gas after the experiment in the mixed gas experiment equipment into the gas collection tank 23 by using the mixed gas compressor, and then closing the fourth switch valve 11, the fifth switch valve 40, the sixth switch valve 42, the mixed gas compressor, the twelfth switch valve 43 and the eleventh switch valve 45 to finish the gas collection and storage of the gas; and opening the tenth switch valve 21, enabling the cryogenic rectification device 19 to work, opening the ninth switch valve 24 and the second gas separation compressor 25, completing cryogenic rectification of the carbon tetrafluoride gas by adopting a high-pressure oil-free direct liquefaction principle, realizing separation and recovery of the carbon tetrafluoride gas, and closing the ninth switch valve 24 and the second gas separation compressor after the carbon tetrafluoride gas is completely recovered. And opening the eighth switch valve 31 and the first gas separation compressor 32, and completing the low-temperature rectification of the sulfur hexafluoride gas by adopting a high-pressure oil-free direct liquefaction principle to realize the separation and recovery of the sulfur hexafluoride gas. The impurities in the mixed gas are filtered and absorbed by the mixed gas filtering device 46. In the next experiment, the mixing of the sulfur hexafluoride gas and the carbon tetrafluoride gas can be realized by opening the thirteenth switch valve 36, the fourteenth switch valve 35, the sixteenth switch valve 29 and the fifteenth switch valve 28.
In other embodiments of the present invention, the gas separation and recovery system may also include a gas mixing tank, where the first gas storage tank and the second gas storage tank are communicated with the gas mixing tank, the gas mixing tank is communicated with the mixed gas experimental facility through a mixed gas experimental facility communication pipeline, and the gas mixing tank may be provided with a mixed pipeline, both ends of which are communicated with the gas mixing tank, and the mixed pipeline is provided with a mixed gas compressor; the gas separation pipeline can be directly communicated with the gas storage tank; the cryogenic rectification plant can also be replaced by an extraction plant; the gas collecting tank is not needed; the mixing pipeline can also be independently arranged as long as the two ends of the mixing pipeline are communicated with the gas storage tank.
An embodiment of a gas separation and recovery system is the same as the embodiments of the gas separation and recovery systems in the embodiments of the gas circuit for mixed gas experiments, and details are not repeated here.
Claims (5)
1. The utility model provides a gas circuit for gas mixture experiments, includes the gas supply system who has the gas holder, its characterized in that: the gas separation and recovery system comprises a gas separation pipeline, a gas separation device arranged on the gas separation pipeline and separated gas storage tanks used for storing each separated gas, wherein each separated gas storage tank is provided with a gas storage tank air inlet pipeline communicated with a gas storage tank of the gas supply system; the gas supply system comprises a gas storage tank, a gas supply pipeline, a first gas cylinder for containing sulfur hexafluoride gas, a second gas cylinder for containing carbon tetrafluoride gas, a gas inlet pipeline of the gas storage tank, a gas return pipeline and a mixing pipeline, wherein the gas storage tank is provided with a gas return port, a gas outlet and two gas inlets; the mixed gas experiment equipment is connected with a gas path for mixed gas experiments through a pipeline joint, one end of a gas return pipeline is communicated with a gas supply pipeline, the other end of the gas return pipeline is communicated with a gas return port of a gas storage tank, the gas return pipeline and the mixed pipeline share a compression pipeline formed by a first compressor and a condenser, a third switch valve and a gas return filtering device are arranged on the gas return pipeline, a fourth switch valve is arranged between the pipeline joint and the third switch valve on the gas supply pipeline, an intermediate pipeline is arranged between the gas supply pipeline and the gas return pipeline, one end of the intermediate pipeline is communicated with the gas supply pipeline, the other end of the intermediate pipeline is communicated with the upstream of the first compressor, and a fifth switch valve is arranged on the intermediate pipeline; one end of the gas separation pipeline is communicated with the gas supply pipeline, the gas supply pipeline is provided with a joint connected with the gas separation pipeline, a sixth switch valve is arranged on the upstream of the joint on the gas supply pipeline, and a seventh switch valve is arranged between the upstream of the middle pipeline and the downstream of the joint on the gas supply pipeline.
2. The gas circuit for mixed gas experiments as claimed in claim 1, wherein: the gas separation device is a cryogenic rectification device.
3. The gas circuit for mixed gas experiments as claimed in claim 1, wherein: the first gas cylinder and the second gas cylinder are communicated with corresponding gas storage tank gas inlet pipelines through three-way connectors, gas cylinder switch valves are arranged at outlets of the gas cylinders, and switch valves are arranged at the other two ends of the three-way connectors on the gas storage tank gas inlet pipelines.
4. The gas circuit for mixed gas experiments as claimed in claim 1, wherein: and a gas collecting tank for collecting the mixed gas in the mixed gas experimental device and/or the gas storage tank before separation is arranged on the gas separation pipeline at the upstream of the gas separation device.
5. The gas circuit for mixed gas experiments as claimed in claim 1, wherein: and a gas separation compressor is arranged between each separated gas storage tank and the gas separation device.
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| CN201710074424.6A CN106823871B (en) | 2017-02-10 | 2017-02-10 | Gas separation recovery system and gas circuit for mixed gas experiment |
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| CN201710074424.6A CN106823871B (en) | 2017-02-10 | 2017-02-10 | Gas separation recovery system and gas circuit for mixed gas experiment |
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| CN106823871B true CN106823871B (en) | 2020-03-13 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104150449A (en) * | 2014-08-18 | 2014-11-19 | 国家电网公司 | Method for purifying mixed insulation gas in electric apparatus |
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| JP2005188717A (en) * | 2003-12-26 | 2005-07-14 | Daido Air Products Electronics Kk | Method of recovering gas and gas recovery device and gas recovery system |
| CN103649661B (en) * | 2011-04-21 | 2016-02-17 | Abb技术有限公司 | A kind of apparatus and method reclaiming the sulfur hexafluoride Gong reusing |
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| CN104150449A (en) * | 2014-08-18 | 2014-11-19 | 国家电网公司 | Method for purifying mixed insulation gas in electric apparatus |
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