CN112516746A - C4F7N/CO2Mixed gas recovery and purification device - Google Patents
C4F7N/CO2Mixed gas recovery and purification device Download PDFInfo
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- CN112516746A CN112516746A CN202011417288.4A CN202011417288A CN112516746A CN 112516746 A CN112516746 A CN 112516746A CN 202011417288 A CN202011417288 A CN 202011417288A CN 112516746 A CN112516746 A CN 112516746A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0454—Controlling adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Abstract
C4F7N/CO2混合气体回收净化装置，包括回收净化气路和罐充气路；回收净化气路的进气端设有进气接口，出气端连接罐充气路的进气端，从进气端到出气端还依次设有第一压力传感器、第一电磁阀、吸附模块；罐充气路的出气端设有出气接口，罐充气路上从进气端到出气端依次设有第一减压稳压阀、压缩机、单向阀和第二压力传感器，单向阀的出气口连接出气接口。还包括尾气回收支路、在线取样支路、混气浓度修正气路，尾气回收支路把连接管路里面留存的高压气体释放到内置的存储罐中，在线取样支路和混气浓度修正气路配合，修正混合气体浓度，使之能循环利用。
The C 4 F 7 N/CO 2 mixed gas recovery and purification device includes a recovery and purification gas circuit and a tank charging circuit; the intake end of the recovery and purification gas circuit is provided with an intake port, and the gas outlet end is connected to the intake end of the tank charging circuit. A first pressure sensor, a first solenoid valve, and an adsorption module are also arranged in sequence from the air inlet end to the air outlet end; the air outlet end of the tank gas filling circuit is provided with an air outlet interface, and the tank gas charging circuit is sequentially provided with a first reducer from the gas inlet end to the gas outlet end. A pressure regulator valve, a compressor, a one-way valve and a second pressure sensor are provided, and the air outlet of the one-way valve is connected to the air outlet. It also includes a tail gas recovery branch, an online sampling branch, and a gas mixture concentration correction gas circuit. The tail gas recovery branch releases the high-pressure gas retained in the connecting pipeline into the built-in storage tank. Correct the gas path coordination, correct the mixed gas concentration, so that it can be recycled.
Description
Technical Field
The invention belongs to the technical field of recovery and purification of insulating gas, and particularly relates to a C4F7N/CO2A mixed gas recovery and purification device.
Background
Perfluoroisobutyronitrile (formula C)4F7N, hereinafter referred to as C4 gas) is a novel insulating gas, and the insulating property is superior to that of sulfur hexafluoride (SF)6) Gas, C4F7N dielectric strength SF at the same pressure6Nearly 2 times of that of the general formula (I), and the greenhouse effect of C4F7N is higher than that of SF6Much smaller gas than SF in natural state6The gas is easily decomposed.
But C is4F7The liquefaction temperature of N is high, the liquefaction temperature under normal pressure is-4.7 ℃, the N can not be used independently, and gases (such as CO) are required to be diluted2、N2Or air) may be used in combination. By inquiring relevant documents, the power industry generally adopts C as the mixed insulating gas4F7N and CO2Mixed use, C in mixed gas4The concentration of F7N is generally around 10%.
In the type test and maintenance of the electrical equipment, mixed gas (hereinafter referred to as mixed gas) needs to be recovered, the recovered mixed gas can be recycled after being purified by purification equipment, and the purification equipment needs to purify micro water, solid particles and decomposition products generated by discharge in the mixed gas. Before recycling, the concentration of the mixed gas needs to be adjusted to meet the requirement of recycling the gas.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a C4F7N/CO2A mixed gas recovery and purification device.
In order to solve the technical problems, the invention adopts the following technical scheme: c4F7N/CO2The mixed gas recovery and purification device comprises a recovery and purification gas path and a tank gas filling path;
the gas inlet end of the recycling and purifying gas circuit is provided with a gas inlet interface, the gas outlet end of the recycling and purifying gas circuit is connected with the gas inlet end of the tank gas charging circuit, and a first pressure sensor, a first electromagnetic valve and an adsorption module are sequentially arranged on the recycling and purifying gas circuit from the gas inlet end to the gas outlet end;
the air outlet end of the tank air charging path is provided with an air outlet interface, a first pressure reducing and stabilizing valve, a compressor, a one-way valve and a second pressure sensor are sequentially arranged on the tank air charging path from the air inlet end to the air outlet end, and the air outlet of the one-way valve is connected with the air outlet interface.
The online sampling branch is also included, the air inlet end of the online sampling branch is also connected with the air outlet end of the recovery and purification air path, the air outlet end is connected with the online sampling interface, and the online sampling branch is also provided with a second electromagnetic valve and a second pressure reducing and stabilizing valve.
The tail gas recovery branch is connected to the gas inlet end of a first pressure reducing and stabilizing valve on the tank gas charging path, the gas inlet end of the tail gas recovery branch is connected to the tank gas charging path between the one-way valve and the gas outlet port, the tail gas recovery branch is sequentially connected with a fourth electromagnetic valve, a second manual valve, a storage tank, a first manual valve and a third electromagnetic valve in series from the gas inlet end to the gas outlet end, and a third pressure sensor is arranged on the storage tank.
The gas mixing concentration correcting gas circuit is characterized by further comprising a gas mixing concentration correcting gas circuit, wherein the gas outlet end of the gas mixing concentration correcting gas circuit is arranged on a tank gas charging circuit between the one-way valve and the gas outlet connector, the gas inlet end of the gas mixing concentration correcting gas circuit is connected with a sample gas storage bottle, and a third pressure reducing and stabilizing valve, an ITV electric proportional valve, a ball valve and a fifth electromagnetic valve are sequentially connected in series from the gas inlet end to the gas outlet end of the gas mixing concentration correcting gas circuit.
The range of the first pressure sensor is-0.1-1.6 MPa; the range of the second pressure sensor is 0-5 MPa.
The ITV electric proportional valve is ITV 2020.
The adsorption module 9 is filled with 4A molecular sieve.
The working principle is as follows:
the mixed gas recovery and tank charging process, the first electromagnetic valve is opened,and closing the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve, connecting the air inlet interface with the electrical equipment to be recovered through a pipeline, and connecting the air outlet interface with an external air storage tank through a pipeline. The recovery process is started, the mixed gas flows through the first electromagnetic valve, enters the adsorption module, and then is compressed to the external gas storage tank through the first pressure reducing and stabilizing valve and the compressor. The adsorption module is filled with 4A molecular sieve, and can adsorb micro water, solid particles, decomposition products generated by discharge and part of CO in the mixed gas2Gas, and not C4 gas. And after the mixed gas is completely recovered, closing the external valve of the electrical equipment to be recovered, and closing the external gas storage tank valve.
And (5) tail gas recovery. And opening the fourth electromagnetic valve to release the high-pressure gas retained in the connecting pipeline into the built-in storage tank. The second pressure sensor may monitor the charge pressure. The pipeline of release pressure is more easily dismantled, also reduces the gas and arranges outward. When the gas recovery device is used next time, the third electromagnetic valve and the compressor are opened, the fourth electromagnetic valve and the fifth electromagnetic valve are closed, gas in the built-in storage tank can be recovered firstly, and then gas to be recovered in the electrical equipment is recovered.
Before recycling, the concentration of the mixed gas needs to be adjusted to meet the requirement of recycling the gas. The principle of concentration correction is a partial pressure law, the concentration of mixed gas can be measured through an online sampling interface, the pressure of the mixed gas can be measured through a second pressure sensor, the corrected concentration, namely the final preparation concentration, can be known, and the dilution gas A, namely CO, which needs to be supplemented can be calculated2The partial pressure of the gas can be controlled by an ITV electric proportional valve to control the partial pressure of the sample gas A, so as to achieve the purpose of diluting the concentration of the gas. The modified mixed gas can be directly used next time.
By adopting the technical scheme, the invention not only can realize C4F7N/CO2The mixed gas is recycled and purified, and the concentration of the mixed gas can be adjusted to meet the requirement of recycling.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
As shown in fig. 1, the present inventionInvention C4F7N/CO2The mixed gas recovery and purification device comprises a recovery and purification gas circuit (1) and a tank gas charging circuit (2);
the gas inlet end of the recovery purification gas circuit (1) is provided with a gas inlet connector (6), the gas outlet end is connected with the gas inlet end of the tank gas charging circuit, and the recovery purification gas circuit (1) is sequentially provided with a first pressure sensor (7), a first electromagnetic valve (8) and an adsorption module (9) from the gas inlet end to the gas outlet end;
the air outlet end of the tank air charging path (2) is provided with an air outlet interface (14), a first pressure reducing and stabilizing valve (10), a compressor (11), a one-way valve (12) and a second pressure sensor (13) are sequentially arranged on the tank air charging path from the air inlet end to the air outlet end, and the air outlet of the one-way valve (12) is connected with the air outlet interface (14).
The device is characterized by further comprising an online sampling branch (3), wherein the air inlet end of the online sampling branch (3) is also connected with the air outlet end of the recovery and purification air circuit (1), the air outlet end is connected with an online sampling interface (17), and a second electromagnetic valve (15) and a second pressure reducing and stabilizing valve (16) are further arranged on the online sampling branch (3).
Still retrieve branch road (4) including the tail gas, the end of giving vent to anger of tail gas recovery branch road (4) is connected to the inlet end of jar gas charging circuit (2) first decompression surge damping valve (10), the inlet end of tail gas recovery branch road (4) is connected to on jar gas charging circuit (2) between check valve (12) and interface (14) of giving vent to anger, fourth solenoid valve (22), second manual valve (20), storage jar (18), first manual valve (19), third solenoid valve (21) concatenate in proper order from the inlet end to the end of giving vent to anger on tail gas recovery branch road (4), be equipped with third pressure sensor (23) on storage jar (18).
The gas mixing concentration correction device is characterized by further comprising a gas mixing concentration correction gas circuit (5), wherein the gas outlet end of the gas mixing concentration correction gas circuit (5) is arranged on the tank gas filling circuit (2) between the one-way valve (12) and the gas outlet connector (14), the gas inlet end of the gas mixing concentration correction gas circuit (5) is connected with a sample gas storage bottle (24), and the gas mixing concentration correction gas circuit (5) is sequentially connected with a third pressure reducing and stabilizing valve (25), an ITV electric proportional valve (26), a ball valve (27) and a fifth electromagnetic valve (28) in series from the gas inlet end to the gas outlet end.
The range of the first pressure sensor (7) is-0.1-1.6 MPa; the range of the second pressure sensor (13) is 0-5 MPa.
The ITV electric proportional valve (26) adopts ITV 2020.
The adsorption module (9) is filled with 4A molecular sieve.
The working principle is as follows:
mixed gas recovery and tank charging process. The first electromagnetic valve 8 is opened, the second electromagnetic valve 15, the third electromagnetic valve 21, the fourth electromagnetic valve 22 and the fifth electromagnetic valve 28 are closed, the air inlet interface 6 is connected with the electrical equipment to be recovered through a pipeline, and the air outlet interface 14 is connected with the external air storage tank through a pipeline. The recovery process is started, the mixed gas flows through the first electromagnetic valve 8, enters the adsorption module 9, and then is compressed to the external gas storage tank through the first pressure reducing and stabilizing valve 10 and the compressor 11. The adsorption module 9 is filled with 4A molecular sieve, and can adsorb micro water, solid particles, decomposition products generated by discharge and part of CO in the mixed gas2Gas, and not C4 gas. And after the mixed gas is completely recovered, closing the external valve of the electrical equipment to be recovered, and closing the external gas storage tank valve.
And (5) tail gas recovery. The fourth solenoid valve 22 is opened to release the high-pressure gas remaining in the connecting line into the built-in storage tank 18. The second pressure sensor may monitor the charge pressure. The pipeline of release pressure is more easily dismantled, also reduces the gas and arranges outward. When the gas recovery device is used next time, the third electromagnetic valve 21 and the compressor 11 are opened, and the fourth electromagnetic valve 22 is closed, so that the gas in the built-in storage tank 18 can be recovered first, and then the gas to be recovered in the electrical equipment can be recovered.
Before recycling, the concentration of the mixed gas needs to be adjusted to meet the requirement of recycling the gas. The principle of concentration correction is a partial pressure law, the concentration of mixed gas can be measured through the online sampling interface 17, the pressure of the mixed gas can be measured through the second pressure sensor 13, the corrected concentration, namely the final preparation concentration, can be known, and the dilution gas A, namely CO, which needs to be supplemented can be calculated2The partial pressure of the gas can be controlled by an ITV electric proportional valve to control the partial pressure of the sample gas A, so as to achieve the purpose of diluting the concentration of the gas. The modified mixed gas can be directly used next time。
By adopting the technical scheme, the invention not only can realize C4F7N/CO2The mixed gas is recycled and purified, and the concentration of the mixed gas can be adjusted to meet the requirement of recycling.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (8)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113294969A (en) * | 2021-05-27 | 2021-08-24 | 国网浙江省电力有限公司电力科学研究院 | Device and method for separating mixed gas of perfluoroisobutyronitrile and carbon dioxide |
| CN113842744A (en) * | 2021-09-06 | 2021-12-28 | 化学与精细化工广东省实验室 | Adsorption purification recycling method for recovering insulating gas from perfluoroisobutyronitrile/carbon dioxide |
| CN113893642A (en) * | 2021-10-19 | 2022-01-07 | 国网安徽省电力有限公司电力科学研究院 | A kind of ring main unit C4F7N/CO2 mixed gas on-site recovery device and method |
| CN113952823A (en) * | 2021-10-19 | 2022-01-21 | 国网安徽省电力有限公司电力科学研究院 | Recovered C4F7N/CO2Device and method for separating and purifying mixed gas |
| CN114950100A (en) * | 2022-05-31 | 2022-08-30 | 珠海经济特区恒迪科技有限公司 | A kind of environmentally friendly alternative mixed gas purification treatment equipment and method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113294969A (en) * | 2021-05-27 | 2021-08-24 | 国网浙江省电力有限公司电力科学研究院 | Device and method for separating mixed gas of perfluoroisobutyronitrile and carbon dioxide |
| CN113294969B (en) * | 2021-05-27 | 2022-04-01 | 国网浙江省电力有限公司电力科学研究院 | Device and method for separating mixed gas of perfluoroisobutyronitrile and carbon dioxide |
| CN113842744A (en) * | 2021-09-06 | 2021-12-28 | 化学与精细化工广东省实验室 | Adsorption purification recycling method for recovering insulating gas from perfluoroisobutyronitrile/carbon dioxide |
| CN113842744B (en) * | 2021-09-06 | 2023-11-17 | 化学与精细化工广东省实验室 | Adsorption purification recycling method for perfluoro-isobutyronitrile/carbon dioxide recovered insulating gas |
| CN113893642A (en) * | 2021-10-19 | 2022-01-07 | 国网安徽省电力有限公司电力科学研究院 | A kind of ring main unit C4F7N/CO2 mixed gas on-site recovery device and method |
| CN113952823A (en) * | 2021-10-19 | 2022-01-21 | 国网安徽省电力有限公司电力科学研究院 | Recovered C4F7N/CO2Device and method for separating and purifying mixed gas |
| CN113893642B (en) * | 2021-10-19 | 2023-09-12 | 国网安徽省电力有限公司电力科学研究院 | A ring main unit C4F7N/CO2 mixed gas on-site recovery device and method |
| CN113952823B (en) * | 2021-10-19 | 2024-03-12 | 国网安徽省电力有限公司电力科学研究院 | C after recovery 4 F 7 N/CO 2 Device and method for separating and purifying mixed gas |
| CN114950100A (en) * | 2022-05-31 | 2022-08-30 | 珠海经济特区恒迪科技有限公司 | A kind of environmentally friendly alternative mixed gas purification treatment equipment and method |
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