CN203790817U - Device for processing test tail gas of hydrogen fluoride standard gas of SF6 decomposition product - Google Patents
Device for processing test tail gas of hydrogen fluoride standard gas of SF6 decomposition product Download PDFInfo
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- CN203790817U CN203790817U CN201420138676.2U CN201420138676U CN203790817U CN 203790817 U CN203790817 U CN 203790817U CN 201420138676 U CN201420138676 U CN 201420138676U CN 203790817 U CN203790817 U CN 203790817U
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- Prior art keywords
- inlet pipe
- pipe
- gas
- air inlet
- iii
- Prior art date
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- 239000007789 gas Substances 0.000 title claims abstract description 60
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910000040 hydrogen fluoride Inorganic materials 0.000 title claims abstract description 31
- 238000000354 decomposition reaction Methods 0.000 title abstract description 3
- 238000010521 absorption reaction Methods 0.000 claims abstract description 47
- 239000003513 alkali Substances 0.000 claims abstract description 22
- 229920001971 elastomer Polymers 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 4
- 239000007799 cork Substances 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 34
- 229910018503 SF6 Inorganic materials 0.000 description 7
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229960000909 sulfur hexafluoride Drugs 0.000 description 2
- 206010001029 Acute pulmonary oedema Diseases 0.000 description 1
- 206010011224 Cough Diseases 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- 206010062717 Increased upper airway secretion Diseases 0.000 description 1
- 206010035664 Pneumonia Diseases 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical class [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 208000026435 phlegm Diseases 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model discloses a device for processing test tail gas of hydrogen fluoride standard gas of an SF6 decomposition product. The device comprises a buffer bottle, a first-stage absorption bottle and a second-stage absorption bottle, which are respectively used for containing alkali liquor, wherein a gas inlet pipe I and a gas outlet pipe I are arranged on a cap of the buffer bottle; a gas inlet pipe II and a gas outlet pipe II are arranged on a cap of the first-stage absorption bottle; a gas inlet pipe III and a gas outlet pipe III are arranged on a cap of the second-stage absorption bottle; the gas inlet pipe I is communicated with a gas exhaust pipe of a chromatographic instrument; the gas outlet pipe I is communicated with the gas inlet pipe II; the gas outlet pipe II is communicated with the gas inlet pipe III; both the gas inlet pipe II and the gas inlet pipe III are guided into the alkali liquor; openings of the gas inlet pipe I and the gas outlet pipes I, II and III are higher than the liquor level. By virtue of the device, the alkali liquor can be prevented from being sucked back to a pipeline of the chromatographic instrument after an experiment is finished, the alkali liquor absorption time can be increased so as to guarantee hydrogen fluoride to be absorbed to the maximum, and alkali liquor moisture can be prevented from entering the pipeline of the chromatographic instrument so as not to influence normal use of the chromatographic instrument.
Description
Technical field
The utility model relates to a kind of test exhaust gas processing device, especially for the chromatography experiment exhaust gas processing device of the hydrogen fluoride calibrating gas in SF6 catabolite.
Background technology
Hydrogen fluoride has extremely strong corrosiveness to all biological tissues.OSHA(U.S. Occupational Safety and Health Administration) regulation, it is 3ppm(volume fraction that 8 hours weighted averages of hydrogen fluoride (take F) allow contact limiting values (TWA-PEL)).Sucking hydrogen fluoride gas can overstimulation lung, causes acute pneumonia and pulmonary edema, and symptom comprises cough, sheds tears, expiratory dyspnea, chest compressing, salivary secretion increase, more than phlegm etc.In the catabolite of sulfur hexafluoride, just contain hydrogen fluoride gas, by gas chromatography, to hydrofluoric analysis in sulfur hexafluoride decomposition product, need to use corresponding hydrogen fluoride calibrating gas.It is background gas that hydrogen fluoride calibrating gas adopts helium (He), and certain density hydrogen fluoride is standard substance.After hydrogen fluoride gas is through chromatographic column and detector, hydrogen fluoride can be discharged to air from chromatographic blast pipe.The concentration of general hydrogen fluoride calibrating gas is 10ppm-500ppm, such concentration is stipulated TWA-PEL(3ppm considerably beyond OSHA), can cause larger injury to laboratory worker, therefore chromatographic blast pipe must be connected to corresponding exhaust gas processing device hydrogen fluoride is absorbed.
Hydrogen fluoride be a kind of very easily with the gas of alkaline reaction, conventional tail gas absorption method is the method that adopts alkali liquor absorption acid tail gas at present, absorption plant is illustrated in fig. 1 shown below: the air inlet of chromatograph blast pipe access Fig. 1, tail gas is being discharged from gas outlet after by alkali liquor absorption.This device has several problems: first, hydrogen fluoride is soluble in water, be easier to alkali lye generation neutralization reaction, if Fig. 1 device is directly connected into instrument, when air inlet has pressure, can not locate to form negative pressure because of the consumption of the moment of tail gas, once can stop experiment or close carrier gas, will form negative pressure because of the moment consumption of tail gas and will cause alkali lye refluence to enter chromatograph, change chromatograph pipe-line system and column system, when serious, even security incident may occur; Second, the gas that enters absorption bottle from air inlet is that carrier gas (He) is with hydrogen fluoride gas, there is higher pressure, the speed that hydrogen fluoride and NaOH (potassium) react is swift in response not as highly basic strong acid, an absorption bottle absorption the reaction time is shorter, can not guarantee that hydrogen fluoride gas is completely absorbed, once unabsorbed hydrogen fluoride gas surpasses 3ppm, will damage staff; The 3rd, if Fig. 1 device is connected with chromatograph gas exhaust piping for a long time, can cause alkali lye moisture to enter chromatograph pipe-line system, affect chromatograph pipe-line system Acidity of Aikalinity, instrument stability in use and security.
Utility model
The problem existing in order to solve prior art, the utility model specifically discloses a kind of test exhaust gas processing device of SF6 catabolite hydrogen fluoride gas.
The technical solution adopted in the utility model is as follows:
A kind of test exhaust gas processing device of SF6 catabolite hydrogen fluoride gas, comprise the surge flask of splendid attire alkali lye respectively, one-level absorption bottle and secondary absorption bottle, the bottle cap of described surge flask is provided with air inlet pipe I, escape pipe I, on the bottle cap of one-level absorption bottle, be provided with air inlet pipe II and escape pipe II, on the bottle cap of secondary absorption bottle, be provided with air inlet pipe III and escape pipe III, described air inlet pipe I is communicated with chromatograph blast pipe, described escape pipe I is communicated with by rubber tube with air inlet pipe II, described escape pipe II is communicated with by rubber tube with air inlet pipe III, and air inlet pipe II, air inlet pipe III is all incorporated in alkali lye, air inlet pipe I, escape pipe I, II, the mouth of pipe of III is all higher than liquid level, in the connecting pipe of described air inlet pipe I and chromatograph blast pipe, be provided with stop valve.
The bottleneck of described surge flask, one-level absorption bottle and secondary absorption bottle is all by cork or rubber stopper seal.
Alkali lye in described surge flask in lye ratio one-level absorption bottle, secondary absorption bottle is few, and in it, solution has 50mL.
The beneficial effects of the utility model are: the utility model connects a surge flask before the absorption bottle of Fig. 1, is provided with stop valve before surge flask, access at least one alkali liquor absorption bottle thereafter.Can prevent that alkali lye suck-back, to chromatograph pipeline, can increase the alkali liquor absorption time again after experiment stops, guaranteeing that hydrogen fluoride is absorbed to greatest extent, can also prevent moisture intrusion chromatograph pipe-line system.
The NaOH saturated solution of 50mL left and right is arranged at surge flask bottom, and the hydrogen fluoride gas of staying after whole experiment finishes in surge flask can be absorbed gradually, causes hydrogen fluoride to be revealed while having prevented post-processed absorption plant.
Stop valve can prevent that the moisture in surge flask from corroding chromatograph pipe-line system, and in process of the test, stop valve is in open mode, and off-test stop valve is in closed condition.
Accompanying drawing explanation
The experimental rig that Fig. 1 is original;
Fig. 2 device of the present utility model;
In figure: 1. air inlet pipe I, 2. escape pipe I, 3. air inlet pipe II, 4. escape pipe II, 5. air inlet pipe III, 6. escape pipe III, 7. secondary absorption bottle, 8. saturated sodium hydroxide solution, 9. surge flask, 10. glass tube, 11. corks or rubber stopper, 12. one-level absorption bottles, 13. stop valves.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
In Fig. 2, the test exhaust gas processing device of SF6 catabolite hydrogen fluoride gas, comprise the surge flask 9 of splendid attire alkali lye respectively, one-level absorption bottle 12 and secondary absorption bottle 7, the bottle cap of described surge flask 9 is provided with air inlet pipe I1, escape pipe I2, on the bottle cap of one-level absorption bottle, be provided with air inlet pipe II3 and escape pipe II4, on the bottle cap of secondary absorption bottle, be provided with air inlet pipe III5 and escape pipe III6, described air inlet pipe I1 is communicated with chromatograph blast pipe, described escape pipe I2 is communicated with air inlet pipe II3, described escape pipe II4 is communicated with air inlet pipe III5, and air inlet pipe II3, air inlet pipe III5 is all incorporated in alkali lye, air inlet pipe I, escape pipe I, II, the mouth of pipe of III is all higher than liquid level, in the connecting pipe of described air inlet pipe I and chromatograph blast pipe, be provided with stop valve 13.
Between each pipe, rubber tube connects.By all vials, all with cork or rubber stopper 11, seal, the chromatography test tail gas of hydrogen fluoride calibrating gas enters surge flask middle part from the air inlet pipe I1 of surge flask, in surge flask more than the liquid level of solution, from the escape pipe I2 of surge flask, by glass tube 10, enter one-level absorption cell, the air inlet of one-level absorption cell is in the bottom of saturated sodium hydroxide solution, escape pipe II4 is at the top of one-level absorption cell, hydrogen fluoride tail gas is entering secondary absorption cell by glass tube 10 after one-level absorption cell, air inlet pipe III5 is in the bottom of secondary absorption cell, escape pipe III6 is at the top of secondary absorption cell, after secondary absorption cell, remaining helium (He) only in test tail gas, directly discharged to atmosphere.
It is pointed out that the chemical equation of this device in absorption process is as follows:
HF+NaOH(is excessive)---→ NaF+H
2o
The alkali lye using in the utility model is saturated sodium hydroxide solution 8 or saturated potassium hydroxide solution.
Claims (3)
1. the test exhaust gas processing device of a SF6 catabolite hydrogen fluoride gas, it is characterized in that: comprise the surge flask of splendid attire alkali lye respectively, one-level absorption bottle and secondary absorption bottle, the bottle cap of described surge flask is provided with air inlet pipe I, escape pipe I, on the bottle cap of one-level absorption bottle, be provided with air inlet pipe II and escape pipe II, on the bottle cap of secondary absorption bottle, be provided with air inlet pipe III and escape pipe III, described air inlet pipe I is communicated with chromatograph blast pipe, described escape pipe I is communicated with air inlet pipe II, described escape pipe II is communicated with air inlet pipe III, and air inlet pipe II, air inlet pipe III is all incorporated in alkali lye, air inlet pipe I, escape pipe I, II, the mouth of pipe of III is all higher than liquid level, in the connecting pipe of described air inlet pipe I and chromatograph blast pipe, be provided with stop valve.
2. test exhaust gas processing device as claimed in claim 1, is characterized in that: the bottleneck of described surge flask, one-level absorption bottle and secondary absorption bottle is all by cork or rubber stopper seal.
3. test exhaust gas processing device as claimed in claim 1, is characterized in that: the alkali lye in described surge flask in lye ratio one-level absorption bottle, secondary absorption bottle is few, and in it, solution has 50mL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420138676.2U CN203790817U (en) | 2014-03-25 | 2014-03-25 | Device for processing test tail gas of hydrogen fluoride standard gas of SF6 decomposition product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420138676.2U CN203790817U (en) | 2014-03-25 | 2014-03-25 | Device for processing test tail gas of hydrogen fluoride standard gas of SF6 decomposition product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203790817U true CN203790817U (en) | 2014-08-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420138676.2U Expired - Fee Related CN203790817U (en) | 2014-03-25 | 2014-03-25 | Device for processing test tail gas of hydrogen fluoride standard gas of SF6 decomposition product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203790817U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111729494A (en) * | 2020-06-08 | 2020-10-02 | 江西渠成氟化学有限公司 | Hydrogen fluoride tail gas treatment method |
| CN112707891A (en) * | 2020-12-29 | 2021-04-27 | 华南理工大学 | Method and device for inert gas assisted purification of OLED material or intermediate thereof |
-
2014
- 2014-03-25 CN CN201420138676.2U patent/CN203790817U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111729494A (en) * | 2020-06-08 | 2020-10-02 | 江西渠成氟化学有限公司 | Hydrogen fluoride tail gas treatment method |
| CN112707891A (en) * | 2020-12-29 | 2021-04-27 | 华南理工大学 | Method and device for inert gas assisted purification of OLED material or intermediate thereof |
| CN112707891B (en) * | 2020-12-29 | 2021-11-23 | 华南理工大学 | Method and device for inert gas assisted purification of OLED material or intermediate thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20190325 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |