CN202533285U - Sampling apparatus applying iodine-immersed silica gel to absorb mercury in natural gas - Google Patents
Sampling apparatus applying iodine-immersed silica gel to absorb mercury in natural gas Download PDFInfo
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- CN202533285U CN202533285U CN2012200871390U CN201220087139U CN202533285U CN 202533285 U CN202533285 U CN 202533285U CN 2012200871390 U CN2012200871390 U CN 2012200871390U CN 201220087139 U CN201220087139 U CN 201220087139U CN 202533285 U CN202533285 U CN 202533285U
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- silica gel
- iodine
- stopple coupon
- mercury
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Abstract
A sampling apparatus applying iodine-immersed silica gel to absorb mercury in natural gas is used for sampling micro mercury in the natural gas. A sealed cavity is formed in a high-pressure sampling hood; an air inlet is formed on a base, and the other end of the air inlet is located on the upper plane of a first lug boss of the base; a gasket ring and a first sampling tube are arranged on the first lug boss; the iodine-immersed silica gel is in the first sampling tube; the upper end of the first sampling tube is communicated with a second sampling tube via a silica gel tube, a flexible tube and a connecting hole, and the second sampling tube is fixed on the second lug boss of the base via a fixing and pressing cap; and the base is connected with an air outlet pipe, on which a needle-type valve and an air flow meter are fixed. The invention has the benefits that the sampling apparatus applies a quartz glasses sampling tube filled with the iodine-immersed silica gel to sample the mercury gathering in the natural gas under conditions of high pressure and heat insulation and prevents heavy hydrocarbon in the natural gas from condensing on the iodine-immersed silica gel, so as to avoid interference of the heavy hydrocarbon in the assaying of the mercury.
Description
Technical field
The utility model relates to the microcomponent analysis technical field of rock gas, particularly a kind of sampler that under high pressure and heat-retaining condition, soaks mercury in the silica gel adsorption rock gas with iodine.
Background technology
Contain the mercury of trace in the rock gas, the content of the common mercury of China's natural gas is 100～3000ng/m3.In combustion of natural gas and process, the mercury in the rock gas constantly is discharged in the air, and airborne mercury is converted into various forms of mercury compounds entering soil, water and animal and plant bodies etc. by all means.Like this, not only environment is polluted, also possibly constitute influence human health.
In the natural gas processing process, need sub zero treatment, the plate type finned heat exchanger that cryogenic heat exchanger often adopts aluminium alloy to make.If contain mercury in the rock gas,, can generate the very little amalgam of adhesion on its surface with reactive aluminum, and pellumina fine and close on the surface is come off although its content is atomic.Amalgam is claimed mercury alloy again, is mercury and the formed alloy of one or more other metals.Accumulate over a long period, finally cause the plate type finned heat exchanger corrosion leakage that aluminium alloy is processed, so very harmful.If moisture in the logistics, thus then water can be accelerated corrosion with amalgam generation chemical reaction, that is:
Al+Hg→AlHg
2AlHg+6H
2O→2Al(OH)
3+3H
2+2Hg
Therefore, for avoiding mercury in the rock gas, must need to analyze the mercury content in the rock gas to mercurous rock gas demercuration to the harm of environment and natural gas treatment plant.
Because mercury content in rock gas is extremely low, and the hydro carbons in the rock gas can produce test and disturb, and therefore generally takes the rock gas of certain volume through absorption or alternate manner to analyze the mercury enrichment then.International standard ISO 6978:2003 revises ISO 6978:1992, has stipulated the new method of the mensuration of mercury content in the rock gas: means of iodine chemical absorption method and gold/platinum absorption method.Standard GB/T16781.1-2008 " the mensuration first of rock gas mercury content: means of iodine chemical absorption sampling method " revises and adopts ISO 6978-1:2003, has stipulated to adopt iodine dipping silica gel chemisorption sampling method to measure the method for mercury content in the rock gas.
At present, commonly used under normal pressure the device of mercury content in the sampling and measuring rock gas because the retrograde fall out effect of rock gas possibly cause the heavy hydrocarbon condensation in the step-down process, be adsorbed on the mercury absorbent, the impact analysis instrument is to the analysis of mercury.
Domestic and foreign literature has been introduced and has been adopted iodo-active carbon adsorption pipe to collect the mercury in the natural gas line; Comprise iodine or sulphur impregnated carbon media, the media that media that noble metal such as yellow gold, silver or copper are formed or chemical treatment filtering material are formed is as mercury ST in the natural gas line of gatherer.
The utility model content
The purpose of the utility model is: a kind of sampler that soaks mercury in the silica gel adsorption rock gas with iodine is provided; Can under high pressure and insulation, soak the mercury in the silica gel adsorption rock gas with iodine; Make the mercury enrichment; Avoid the heavy hydrocarbon condensation in the rock gas simultaneously, the influence of avoiding heavy hydrocarbon that mercury is analyzed improves mercury content is analyzed in the rock gas accuracy and reliability.
The technical scheme that the utility model adopts is: soak the sampler of mercury in the silica gel adsorption rock gas with iodine, comprise that high-pressure sampling cover, first stopple coupon, iodine soak silica gel, fixedly pressure cap, sealing gasket, O-ring seal, air admission hole, needle valve, thermometer, tensimeter, gas meter, base, venthole, connecting hole, flexible pipe and second stopple coupon.Top seal at cylindrical shape high-pressure sampling cover is equipped with thermometer and tensimeter, the pressure and temperature of record sampling in sampling.On the high-pressure sampling cover outer wall, heat-insulation layer is arranged, the temperature during with the maintenance sampling.It is characterized in that: the lower end screw thread of high-pressure sampling cover is fixed on the base, between high-pressure sampling cover and base, O-ring seal is arranged.Form annular seal space in the high-pressure sampling cover, the upper surface of base is in the high-pressure sampling cover; Base two columniform protruding platforms are arranged, two columniform protruding platforms have external thread; Air admission hole is arranged on base, and an end of air admission hole is on the outer wall of base and connect draft tube, is fixed with needle valve on the draft tube; The other end of air admission hole is on plane on the first protruding platform of base; The sealing gasket and first stopple coupon that annular is arranged on the first protruding platform are fixed on first stopple coupon on the first protruding platform of base through fixing pressure cap; In first stopple coupon, there is iodine to soak silica gel; First stopple coupon upper end connects silicone tube, and the other end of silicone tube connects flexible pipe, and the other end of flexible pipe is connected the inlet end of connecting hole; Described connecting hole one end is on plane on the base, and the other end of connecting hole is on plane on the second protruding platform of base; The sealing gasket and second stopple coupon that annular is arranged on the second protruding platform are fixed on second stopple coupon on the second protruding platform of base through fixing pressure cap; In second stopple coupon, there is iodine to soak silica gel; There is opening second stopple coupon upper end; Venthole is arranged on the base, and an end of described venthole is on the outer wall of base and connect escape pipe, is fixed with needle valve and gas meter on the escape pipe; The other end of venthole is on plane on the second protruding platform of base.
Soak the course of work of the sampler of mercury in the silica gel adsorption rock gas with iodine.Consult Fig. 1.Before sampling, the initial reading of record gas meter 13 is slowly opened the needle valve 10 on the draft tube that air admission hole 9 connects, and rock gas gets into first stopple coupon 4 through stainless-steel tube.In first stopple coupon 4, fill iodine and soak silica gel 5 as adsorbent.Rock gas leads to silicone tube 2, flexible pipe 17 and connecting hole 16, gets into second stopple coupon 18.Process is filtered for the second time in second stopple coupon 18.After crossing the pressure equilibrium of the pressure treated in the high-pressure sampling cover 3 and rock gas, slowly open the needle valve and the adjustments of gas flow velocity of gas outlet connection again.Gas flow rate is by the pressure decision of rock gas, for the rock gas of pressure p＞6.0MPa, gas flow rate=6m
3/ h～8m
3/ h, for the rock gas of pressure p≤6.0MPa, the numerical value of gas flow rate=p, m
3/ h.When sampling finishes, should close needle valve 10 earlier, treat the gas emptying in the high-pressure sampling cover 3 after, the final reading of record gas meter 13 is opened the high-pressure sampling cover, and the iodine that takes out in the stopple coupon soaks silica gel 5.Should avoid iodine to soak silica gel 5 during sampling and bleach fully,, should resample as finding that iodine soaks silica gel 5 and bleaches fully.In the gas with element mercury or organomercury compound (like methyl mercury Hg (CH
3)
2Or ethyl mercury Hg (C
2H
5)
2) the form mercury and Iod R generation mercuric iodixde that exist.
Hg+I
2→HgI
2
Hg(CH
3)
2+I
2→HgI
2+2CH
3I
The beneficial effect of the utility model: the utility model soaks the sampler of mercury in the silica gel adsorption rock gas with iodine; The quartz glass stopple coupon sampling of can be under high pressure and heat-retaining condition soaking silica gel with filling iodine; Mercury in the enrichment rock gas; And prevent that the heavy hydrocarbon condensation is soaked on the silica gel at iodine in the rock gas, the interference of avoiding heavy hydrocarbon that mercury is analyzed.
Description of drawings
Fig. 1 is the utility model soaks mercury in the silica gel adsorption rock gas with iodine a sampler structural profile synoptic diagram.
Among the figure, 1-heat-insulation layer, 2-silicone tube, 3-high-pressure sampling cover, 4-first stopple coupon; 5-iodine soaks silica gel, and 6-is pressure cap fixedly, 7-sealing gasket, 8-O-ring seal, 9-air admission hole; The 10-needle valve, 11-thermometer, 12-tensimeter, 13-gas meter, 14-base; The 15-venthole, 16-connecting hole, 17-flexible pipe, 18-second stopple coupon.
Embodiment
Embodiment 1: be example with a sampler that uses iodine to soak mercury in the silica gel adsorption rock gas, the utility model is done further explain.
Consult Fig. 1.The utility model soaks the sampler of mercury in the silica gel adsorption rock gas with iodine, comprises that high-pressure sampling cover 3, first stopple coupon 4, iodine soak silica gel 5, fixedly pressure cap 6, sealing gasket 7, O-ring seal 8, air admission hole 9, needle valve 10, thermometer 11, tensimeter 12, gas meter 13, base 14, venthole 15, connecting hole 16, flexible pipe 17 and second stopple coupon 18.
High-pressure sampling cover 3 adopts the 316L stainless steel to process, and the internal diameter of high-pressure sampling cover 3 is 95mm, highly is 200mm.Working pressure 40MPa.Top seal at cylindrical shape high-pressure sampling cover 3 is equipped with thermometer 11 and tensimeter 12, tensimeter 12 measurement ranges 0～60Mpa, and accuracy class is 0.4 grade.Thermometer 11 adopts 0～100 ℃, and minimum scale is 0.5 ℃ a mercury thermometer.On high-pressure sampling cover 3 outer walls, heat-insulation layer 1 is arranged, 0～100 ℃ of working temperature.The lower end screw thread of high-pressure sampling cover 3 is fixed on the base 14, between high-pressure sampling cover 3 and base 14, O-ring seal 8 is arranged.Form annular seal space in the high-pressure sampling cover 3, the upper surface of base 14 is in high-pressure sampling cover 3.Base 14 two columniform protruding platforms are arranged, two columniform protruding platforms have external thread.
Air admission hole 9 is arranged on base 14, and an end of air admission hole 9 is on the outer wall of base 14 and connect a draft tube, is fixed with a needle valve 10 on the draft tube.The other end of air admission hole 9 is on plane on the first protruding platform of base 14.The sealing gasket 7 and first stopple coupon 4 of an annular are arranged on the first protruding platform, and the stopple coupon internal diameter is 8mm, wall thickness 0.8mm, and length is 8mm.Through fixing pressure cap 6 first stopple coupon 4 is fixed on the first protruding platform of base 14.In first stopple coupon 4, there is iodine to soak silica gel 5.First stopple coupon, 4 upper ends connect silicone tube 2, and the other end of silicone tube 2 connects flexible pipe 17, and the other end of flexible pipe 17 is connected the inlet end of connecting hole 16.
Described connecting hole 16 1 ends are on plane on the base 14, and the other end of connecting hole 16 is on plane on the second protruding platform of base 14.The sealing gasket 7 and second stopple coupon 18 that annular is arranged on the second protruding platform are fixed on second stopple coupon 4 on the second protruding platform of base 14 through fixing pressure cap 6; In second stopple coupon 4, there is iodine to soak silica gel 5; There is opening second stopple coupon, 4 upper ends.Venthole 15 is arranged on the base 14, and an end of described venthole 15 is on the outer wall of base 14 and connect escape pipe, is fixed with a needle valve 10 and a gas meter 13 on the escape pipe.The other end of venthole 15 is on plane on the second protruding platform of base 14.
Claims (1)
1. one kind is soaked the sampler of mercury in the silica gel adsorption rock gas with iodine, comprises that high-pressure sampling cover (3), first stopple coupon (4), iodine soak silica gel (5), fixedly pressure cap (6), sealing gasket (7), O-ring seal (8), air admission hole (9), needle valve (10), thermometer (11), tensimeter (12), gas meter (13), base (14), venthole (15), connecting hole (16), flexible pipe (17) and second stopple coupon (18); Top seal at cylindrical shape high-pressure sampling cover (3) is equipped with thermometer (11) and tensimeter (12); On high-pressure sampling cover (3) outer wall, heat-insulation layer (1) is arranged; It is characterized in that: the lower end screw thread of high-pressure sampling cover (3) is fixed on the base (14), between high-pressure sampling cover (3) and base (14), O-ring seal (8) is arranged; Form annular seal space in the high-pressure sampling cover (3), the upper surface of base (14) is in high-pressure sampling cover (3); Base (14) two columniform protruding platforms are arranged, two columniform protruding platforms have external thread; Air admission hole (9) is arranged on base (14), and an end of air admission hole (9) is on the outer wall of base (14) and connect draft tube, is fixed with needle valve (10) on the draft tube; The other end of air admission hole (9) is on plane on the first protruding platform of base (14); Sealing gasket (7) and first stopple coupon (4) that annular is arranged on the first protruding platform are fixed on first stopple coupon (4) on the first protruding platform of base (14) through fixing pressure cap (6); In first stopple coupon (4), there is iodine to soak silica gel (5); First stopple coupon (4) upper end connects silicone tube (2), and the other end of silicone tube (2) connects flexible pipe (17), and the other end of flexible pipe (17) is connected the inlet end of connecting hole (16); Described connecting hole (16) one ends are on the last plane of base (14), and the other end of connecting hole (16) is on plane on the second protruding platform of base (14); Sealing gasket (7) and second stopple coupon (18) that annular is arranged on the second protruding platform are fixed on second stopple coupon (4) on the second protruding platform of base (14) through fixing pressure cap (6); In second stopple coupon (4), there is iodine to soak silica gel (5); There is opening second stopple coupon (4) upper end; Venthole (15) is arranged on the base (14), and an end of described venthole (15) is on the outer wall of base (14) and connect escape pipe, is fixed with needle valve (10) and gas meter (13) on the escape pipe; The other end of venthole (15) is on plane on the second protruding platform of base (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200871390U CN202533285U (en) | 2012-03-09 | 2012-03-09 | Sampling apparatus applying iodine-immersed silica gel to absorb mercury in natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200871390U CN202533285U (en) | 2012-03-09 | 2012-03-09 | Sampling apparatus applying iodine-immersed silica gel to absorb mercury in natural gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202533285U true CN202533285U (en) | 2012-11-14 |
Family
ID=47134461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200871390U Expired - Fee Related CN202533285U (en) | 2012-03-09 | 2012-03-09 | Sampling apparatus applying iodine-immersed silica gel to absorb mercury in natural gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202533285U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991144A (en) * | 2017-11-30 | 2018-05-04 | 宁夏大学 | A kind of coal pyrolysis gas Elemental Mercury sampling system |
| US10816532B2 (en) | 2018-10-31 | 2020-10-27 | Petrochina Company Limited | Methods and devices for detecting mercury isotopes in crude oil |
| US11119085B2 (en) | 2018-10-31 | 2021-09-14 | Petrochina Company Limited | Methods and devices for detecting mercury isotopes in oil-gas sources |
| US11119084B2 (en) | 2018-10-31 | 2021-09-14 | Petrochina Company Limited | Methods and devices for detecting mercury isotopes in natural gas |
-
2012
- 2012-03-09 CN CN2012200871390U patent/CN202533285U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991144A (en) * | 2017-11-30 | 2018-05-04 | 宁夏大学 | A kind of coal pyrolysis gas Elemental Mercury sampling system |
| US10816532B2 (en) | 2018-10-31 | 2020-10-27 | Petrochina Company Limited | Methods and devices for detecting mercury isotopes in crude oil |
| US11119085B2 (en) | 2018-10-31 | 2021-09-14 | Petrochina Company Limited | Methods and devices for detecting mercury isotopes in oil-gas sources |
| US11119084B2 (en) | 2018-10-31 | 2021-09-14 | Petrochina Company Limited | Methods and devices for detecting mercury isotopes in natural gas |
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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: 20121114 Termination date: 20210309 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |