CN102455294A - Detection device, and detection method for hydrogen sulfide in oil product - Google Patents
Detection device, and detection method for hydrogen sulfide in oil product Download PDFInfo
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- CN102455294A CN102455294A CN2010105195205A CN201010519520A CN102455294A CN 102455294 A CN102455294 A CN 102455294A CN 2010105195205 A CN2010105195205 A CN 2010105195205A CN 201010519520 A CN201010519520 A CN 201010519520A CN 102455294 A CN102455294 A CN 102455294A
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Abstract
The invention provides a detection device, and a detection method for hydrogen sulfide in an oil product. By the detection device and the detection method, the oil product can be sampled under the condition of isolating the air, so that the hydrogen sulfide can be prevented from escaping from the oil product to the air; furthermore, the hydrogen sulfide can be prevented from being oxidized by oxygen in the air; therefore, a small amount of hydrogen sulfide can be detected; and the detecting range of petroleum products is expanded.
Description
Technical field
The present invention relates to a kind of pick-up unit, and the detection method of sulfuretted hydrogen in a kind of oil product.
Background technology
Be present in the sulfuretted hydrogen in the petroleum products, cause that easily the corrosivity index (silver slice corrosion rank, copper corrosion rank) of oil product is defective, therefore be regarded as objectionable impurities.
Because sulfuretted hydrogen is unstable in oil product, both from oil, overflows easily, chemical reaction (as be dissolved in the oxygen institute's oxidation in the oil or receive the influence of illumination) very easily takes place again and change into other sulfur species, therefore, the detection of sulfuretted hydrogen is difficulty very.
At present, people adopt lead acetate method to come the sulfuretted hydrogen in the qualitative detection light-end products (like gasoline, jet fuel and diesel oil) usually.During detection; Wetting lead acetate paper is placed on detection bottle (pipe) mouth that the light-end products sample is housed; Detecting bottle (pipe) can heat with water-bath; Sulfuretted hydrogen is overflowed from the liquid oil phase, and makes it variable color with wetting lead acetate paper reaction, thereby confirms the existence of sulfuretted hydrogen in the liquid oils such as gasoline, jet fuel.But the problem that above-mentioned detection method exists is: can't detect by lower oil product the content of sulfuretted hydrogen, more can't carry out detection by quantitative to the lower sulfuretted hydrogen of content.
Simultaneously; Can also use qualitative detection sulfuretted hydrogen such as doctor test's method; Also can use the potentiometric titration (standard GB 1792, the minimum value of detecting are 3 μ g/g) of measuring mercaptan to come detection by quantitative sulfuretted hydrogen, yet; When hydrogen sulfide content lower (for example less than 3 μ g/g), this method still can't detect the existence of sulfuretted hydrogen.
The petroleum chemical industry standard SH/T0125 of country has stipulated the method that adopts lead acetate method to detect sulfuretted hydrogen in the liquefied petroleum gas (LPG) with a kind of; This method is with behind the gasifying liquefied petroleum gas; The petroleum gas that makes gasification is through wetting lead acetate paper; Sulfuretted hydrogen in the liquefied petroleum gas (LPG) and wetting lead acetate paper bar reaction, and make the test strips variable color, confirm existing of sulfuretted hydrogen with this.Though this method can detect the sulfuretted hydrogen that is present in lower content in the rock gas, can not the sulfuretted hydrogen in the liquid oil (like gasoline, jet fuel and diesel oil) be detected.
Summary of the invention
The objective of the invention is to overcome in the prior art defective that can't detect the lower sulfuretted hydrogen of content in the oil product, a kind of pick-up unit and detection method are provided, so that the lower sulfuretted hydrogen of content in the oil product is detected.
The invention provides a kind of pick-up unit; This device comprises first container and second container, and first container and second container are communicated with through conduit, and two ports of conduit lay respectively at the top of first container and the bottom of second container; Wherein, Said pick-up unit also comprises first pipeline, second pipeline and the 3rd pipeline, and an end of first pipeline is communicated with the bottom of first container, and the end to end that is communicated with from the bottom with first container of first pipeline is disposed with first T-valve and first stop valve; Be communicated with between first stop valve of second pipeline, one end and first pipeline and first T-valve; Second pipeline is provided with second stop valve, and an end of the 3rd pipeline is communicated with the top of second container, is provided with the detection test paper in second container.
The present invention also provides the detection method of sulfuretted hydrogen in a kind of oil product; This method comprises to be introduced the oil product that contains sulfuretted hydrogen in first container quantitatively; Make inert gas flow through the oil product that contains sulfuretted hydrogen in first container, the inert gas flow that carries sulfuretted hydrogen is contacted, wherein with detection test paper in second container; This method also comprise introduce the oil product that contains sulfuretted hydrogen in first container quantitatively before, with the air in inert gas replacement first container and second container.
Pick-up unit provided by the invention and detection method; Can guarantee under the condition of secluding air, to take a sample; Thereby avoided sulfuretted hydrogen from oil product, to escape in the air; Also avoided sulfuretted hydrogen by airborne dioxygen oxidation on the other hand, thereby caused and to detect the lower sulfuretted hydrogen of content.
Description of drawings
Fig. 1 is the structural representation that has shown the pick-up unit of one embodiment of the present invention;
Fig. 2 has shown the structural representation that is used as the orifice plate of gas distributor in the pick-up unit provided by the invention.
Fig. 3 is the structural representation that has shown the pick-up unit of a kind of preferred implementation of the present invention;
Fig. 4 is the structural representation that has shown the pick-up unit of another embodiment of the invention;
Fig. 5 is the structural representation that has shown the pick-up unit of another kind of preferred implementation of the present invention.
Embodiment
As shown in Figure 1, the present invention provides a kind of pick-up unit, and this device comprises first container 1 and second container 2; First container 1 and second container 2 are communicated with through conduit 3; And two ports of conduit 3 lay respectively at the top of first container 1 and the bottom of second container 2, and wherein, said pick-up unit also comprises first pipeline 4, second pipeline 5 and the 3rd pipeline 6; One end of first pipeline 4 is communicated with the bottom of first container 1; The end to end that is communicated with from the bottom with first container 1 of first pipeline 4 is disposed with between first stop valve 8 and first T-valve 7 of first T-valve 7 and first stop valve, 8, the second pipelines, 5 one ends and first pipeline 4 and is communicated with, and second pipeline 5 is provided with second stop valve 9; One end of the 3rd pipeline 6 is communicated with the top of second container 2, is provided with in second container 2 to detect test paper 15.
In a kind of preferred implementation shown in Fig. 3 or 5; Second pipeline 5 is provided with second T-valve 10; Be communicated with between first stop valve 8 of outlet of second pipeline, 5 one ends through second T-valve 10 and first pipeline 4 and first T-valve 7, and said pick-up unit also comprises the 4th pipeline 11; One end of the 4th pipeline 11 is communicated with another outlet of second T-valve 10, is communicated with between the two ends of the other end of the 4th pipeline 11 and the 3rd pipeline 6.In this preferred implementation; Because second pipeline 5 is provided with second T-valve 10 and second T-valve is communicated with the 4th pipeline 11, therefore, switching second T-valve 10 so that after first pipeline 4 and 5 disconnections of second pipeline; Second pipeline 5 is communicated with the 4th pipeline 11; Can finally discharge through the 4th pipeline 11 thereby make, and owing to be communicated with between the two ends of the other end of four pipelines 11 and the 3rd pipeline 6, this has just been avoided air from the 3rd pipeline 6 entering second container 2 from the inert gas of second pipeline 5; Thereby make second container 2 and air isolated, with of the influence of further reduction air to testing result.
Among the present invention, first container 1 has no particular limits, as long as can keep sealing and can holding the sample of being got, for example, and can be for having the stopple coupon of scale, the bottom of said stopple coupon is provided with gas distributor 12.Gas distributor can for various can make from the gas of first container, 1 bottom equably with first container 1 in the device that contacts of sampled sample; For example, gas distributor 12 can be orifice plate as shown in Figure 2, and said orifice plate is provided with a plurality of through holes 13; The size of through hole 13 can in very large range change; For example, the diameter of through hole 13 can be 0.2-2mm, is preferably 0.5-1mm; The total sectional area of a plurality of through holes 13 can be preferably 1-50% for the 1-75% of orifice plate single face area.
Said second container 2 has no particular limits, as long as can keep sealing and can hold and detect test paper 15, for example, can have the glass tube of plug for top and bottom.
Shown in Fig. 1 or 3, in one embodiment of the invention, the bottom of second container 2 is provided with the port top that second gas distributor, 14, the second gas distributors 14 are positioned at the conduit 3 of second container, 2 bottoms; Detect test paper 15 for by the lead acetate paper of the bar shaped of water-wet and be positioned at the top of second container 2.The kind of second gas distributor 14 has no particular limits, as long as the gas from first container 1 is contacted with detecting test paper 15 equably, for example, can be surface plate.
Shown in Fig. 4 or 5, in preferred implementation of the present invention, the bottom of second container 2 is provided with funnel, and detecting test paper 15 is that lead acetate paper and the inwall of being close to funnel are placed, and the lower port of funnel is communicated with conduit 3.
The present invention also provides the detection method of sulfuretted hydrogen in a kind of oil product; This method comprises to be introduced the oil product that contains sulfuretted hydrogen in first container quantitatively; Make inert gas flow through the oil product that contains sulfuretted hydrogen in first container, the inert gas flow that carries sulfuretted hydrogen is contacted, wherein with detection test paper in second container; This method also comprise introduce the oil product that contains sulfuretted hydrogen in first container quantitatively before, with the air in inert gas replacement first container and second container.
In one embodiment of the invention; The detection method of sulfuretted hydrogen has been used the pick-up unit shown in Fig. 1 or 4 in the said oil product, and this device comprises that first container 1 and second container, 2, the first containers 1 and second container 2 are communicated with through conduit 3; And two ports of conduit 3 lay respectively at the top of first container 1 and the bottom of second container 2; Wherein, said pick-up unit comprises that also an end of first pipeline 4, second pipeline 5 and the 3rd pipeline 6, the first pipelines 4 is communicated with the bottom of first container 1; The end to end that is communicated with from the bottom with first container 1 of first pipeline 4 is disposed with first T-valve 7 and first stop valve 8; Be communicated with between first stop valve 8 of second pipeline, 5 one ends and first pipeline 4 and first T-valve 7, the end that second pipeline 5 is provided with second stop valve, 9, the three pipelines 6 is communicated with the top of second container 2; Be provided with in second container 2 and detect test paper 15; This method comprises: first T-valve 7 is switched to the bottom of first container 1 be communicated with, open first stop valve 8 and second stop valve 9, inert gas source is communicated with second stop valve 9; Inert gas is flowed out through second pipeline 5, first pipeline 4, first container 1 and second container 2 and from the 3rd pipeline 6 successively; And inert gas is flowed out through second pipeline 5, first pipeline 4 and first stop valve 8 successively, and go out air wherein with inert gas replacement, close first stop valve 8 and second stop valve 9 successively; Open first stop valve 8, make the oil product that contains sulfuretted hydrogen flow into first container 1, reach scheduled volume until the oil product of first container 1 through first pipeline 4; Close first stop valve 8, open second stop valve 9 and make inert gas flow through the oil product that contains sulfuretted hydrogen in first container 1, the inert gas that carries sulfuretted hydrogen is contacted with detection test paper 15 in second container 2.
In above-mentioned detection method, a kind of embodiment of said pick-up unit is: the bottom of second container 2 is provided with the port top that second gas distributor, 14, the second gas distributors 14 are positioned at the conduit 3 of second container, 2 bottoms; Detect test paper 15 for by the lead acetate paper of the bar shaped of water-wet and be positioned at the top (like Fig. 1 or shown in Figure 3) of second container 2.
In above-mentioned detection method; The another kind of embodiment of said pick-up unit is: the bottom of second container 2 is provided with funnel; Detecting test paper 15 is that lead acetate paper and the inwall of being close to funnel are placed, and the lower port of funnel is communicated with (like Fig. 4 or shown in Figure 5) with conduit 3.
In a kind of preferred implementation, the detection method of sulfuretted hydrogen has been used the pick-up unit shown in Fig. 3 or 5 in the said oil product, and this device comprises first container 1 and second container 2; First container 1 and second container 2 are communicated with through conduit 3; And two ports of conduit 3 lay respectively at the top of first container 1 and the bottom of second container 2, and wherein, said pick-up unit also comprises first pipeline 4, second pipeline 5 and the 3rd pipeline 6; One end of first pipeline 4 is communicated with the bottom of first container 1; The end to end that is communicated with from the bottom with first container 1 of first pipeline 4 is disposed with between first stop valve 8 and first T-valve 7 of first T-valve 7 and first stop valve, 8, the second pipelines, 5 one ends and first pipeline 4 and is communicated with, and second pipeline 5 is provided with second stop valve 9; One end of the 3rd pipeline 6 is communicated with the top of second container 2; Be provided with in second container 2 and detect test paper 15, wherein, second pipeline 5 is provided with second T-valve 10; Be communicated with between first stop valve 8 of outlet of second pipeline, 5 one ends through second T-valve 10 and first pipeline 4 and first T-valve 7, this device also comprises the 4th pipeline 11; One end of the 4th pipeline 11 is communicated with another outlet of second T-valve 10; Be communicated with between the two ends of the other end of the 4th pipeline 11 and the 3rd pipeline 6; This method comprises: first T-valve 7 is switched to the bottom of first container 1 be communicated with, second T-valve 10 is switched to first pipeline 4 be communicated with, open first stop valve 8 and second stop valve 9; Inert gas source is communicated with second stop valve 9; Inert gas is flowed out through second pipeline 5, first pipeline 4, first container 1 and second container 2 and from the 3rd pipeline 6 successively, and inert gas is flowed out through second pipeline 5, first pipeline 4 and first stop valve 8 successively, go out air wherein with inert gas replacement; Close first stop valve 8, and second stop valve 9 switched to the 4th pipeline 11 be communicated with; Open first stop valve 8, make the oil product that contains sulfuretted hydrogen flow into first container 1, reach scheduled volume until the oil product of first container 1 through first pipeline 4; Close first stop valve 8, open second stop valve 9 and make inert gas flow through the oil product that contains sulfuretted hydrogen in first container 1, the inert gas that carries sulfuretted hydrogen is contacted with detection test paper 15 in second container 2.
In above-mentioned detection method, a kind of embodiment of said pick-up unit is: the bottom of second container 2 is provided with the port top that second gas distributor, 14, the second gas distributors 14 are positioned at the conduit 3 of second container, 2 bottoms; Detect test paper 15 for by the lead acetate paper of the bar shaped of water-wet and be positioned at the top (like Fig. 1 or shown in Figure 3) of second container 2.Can be the lead acetate paper of bar shaped is wetting through distilled water.
In above-mentioned detection method; The another kind of embodiment of said pick-up unit is: the bottom of second container 2 is provided with funnel; Detecting test paper 15 is that lead acetate paper and the inwall of being close to funnel are placed, and the lower port of funnel is communicated with (like Fig. 4 or shown in Figure 5) with conduit 3.
In a kind of more preferably embodiment; Detection method provided by the invention also comprises: the oil product that contains sulfuretted hydrogen is flowed into before first container 1; Switch first T-valve 7, first pipeline is communicated with another outlet of first T-valve 7, the oil product that part contains sulfuretted hydrogen is flowed out.The gas that possibly exist in emptying first pipeline 4 so better makes the result of detection more accurate.
Among the present invention, first container 1 has no particular limits, as long as can keep sealing and can holding the sample of being got, for example, and can be for having the stopple coupon of scale, the bottom of said stopple coupon is provided with gas distributor 12.Gas distributor can for various can make from the gas of first container, 1 bottom equably with first container 1 in the device that contacts of sampled sample; For example, gas distributor 12 can be orifice plate as shown in Figure 2, and said orifice plate is provided with a plurality of through holes 13; The size of through hole 13 can in very large range change; For example, the diameter of through hole 13 can be 0.2-2mm, is preferably 0.5-1mm; The total sectional area of a plurality of through holes 13 can be preferably 1-50% for the 1-75% of orifice plate single face area.
Said second container 2 has no particular limits, as long as can keep sealing and can hold and detect test paper 15, for example, can have the glass tube of plug for top and bottom.
Among the present invention, the sulfuretted hydrogen that gets into second container 2 contact with wetting lead acetate papers in second container 2, and the existence of indicating sulfuretted hydrogen according to the test paper change in color whether.
Inert gas described in the present invention can be various not with first container 1 in the gas of liquid (comprising sulfuretted hydrogen in oil product and the oil product) and the detection test paper in second container 2 reaction, for example can be in nitrogen, the periodic table of elements group 0 element gas one or more.
Method provided by the invention can detect the low sour product to 0.05 μ g/g of hydrogen sulfide content.
Through concrete instance pick-up unit of the present invention and detection method are carried out more detailed description below.
Getting 1L hydrocracking jet fuel (is provided by Maoming branch office of Sinopec joint-stock company; Mercaptan sulfur content (in sulphur) is not more than 1 μ g/g); With nitrogen that air displacement wherein is clean, and under nitrogen protection, in jet fuel, inject sulfuretted hydrogen (generating) by dilute sulfuric acid and calcium sulfide reaction.Record hydrogen sulfide content (in sulphur) 10 μ g/g through potentiometric titration.
Under nitrogen protection, the above-mentioned jet fuel that contains 10 μ g/g sulfuretted hydrogen is diluted 200 times to the about 0.05 μ g/g of hydrogen sulfide content (dilution is the above-mentioned hydrocracking jet fuel of having used the nitrogen replacement net air).The sample of preparing thus that contains 0.05 μ g/g sulfuretted hydrogen approximately is as testing sample of the present invention.
According to accompanying drawing 1 device is connected, the air displacement in will installing with high pure nitrogen is clean, and uses testing sample that preparation embodiment 1 makes as oil product, and concrete steps are following:
(1) first T-valve 7 is switched to the bottom of first container 1 is communicated with; Open first stop valve 8 and second stop valve 9; Inert gas source is communicated with second stop valve 9; Inert gas (nitrogen) is flowed out through second pipeline 5, first pipeline 4, first container 1 and second container 2 and from the 3rd pipeline 6 successively; And inert gas is flowed out through second pipeline 5, first pipeline 4 and first stop valve 8 successively, and go out air wherein with inert gas replacement, close first stop valve 8 and second stop valve 9 successively;
(2) open first stop valve 8, make the testing sample that embodiment 1 makes flow into first container 1, reach 500mL until the oil product of first container 1 through first pipeline 4;
(3) close first stop valve 8; Opening second stop valve 9 makes inert gas (nitrogen) flow through the testing sample (flow 100mL/min-300mL/min) in first container 1; The inert gas that carries sulfuretted hydrogen is contacted with wetting lead acetate paper bar in second container 2, and the feeding time of control inert gas is 1 hour.Observe the lead acetate paper bar and become little yellow, show to detect hydrogen sulfide gas.
Detect embodiment 2
According to accompanying drawing 3 device is connected, the air displacement in will installing with high pure nitrogen is clean, and uses testing sample that preparation embodiment 1 makes as oil product, and concrete steps are following:
(1) first T-valve 7 is switched to the bottom of first container 1 is communicated with; Second T-valve 10 switched to first pipeline 4 be communicated with; Open first stop valve 8 and second stop valve 9, inert gas source (nitrogen) is communicated with second stop valve 9, inert gas is flowed out through second pipeline 5, first pipeline 4, first container 1 and second container 2 and from the 3rd pipeline 6 successively; And inert gas is flowed out successively through second pipeline 5, first pipeline 4 and first stop valve 8; Go out air wherein with inert gas replacement, close first stop valve 8, and second stop valve 9 switched to the 4th pipeline 11 be communicated with;
(2) open first stop valve 8, make the testing sample that embodiment 1 makes flow into first container 1, reach 500mL until the oil product of first container 1 through first pipeline 4;
(3) close first stop valve 8; Opening second stop valve 9 makes inert gas (nitrogen) flow through the testing sample (flow 100mL/min-300mL/min) in first container 1; The inert gas that carries sulfuretted hydrogen is contacted with wetting lead acetate paper bar in second container 2, and the feeding time of control inert gas is 1 hour.Observe the lead acetate paper bar and become little yellow, show to detect hydrogen sulfide gas.
Detect embodiment 3
According to accompanying drawing 4 device is connected, the air displacement in will installing with high pure nitrogen is clean, and uses testing sample that preparation embodiment 1 makes as oil product, and concrete steps are following:
(1) first T-valve 7 is switched to the bottom of first container 1 is communicated with; Open first stop valve 8 and second stop valve 9; Inert gas source is communicated with second stop valve 9; Inert gas (nitrogen) is flowed out through second pipeline 5, first pipeline 4, first container 1 and second container 2 and from the 3rd pipeline 6 successively; And inert gas is flowed out through second pipeline 5, first pipeline 4 and first stop valve 8 successively, and go out air wherein with inert gas replacement, close first stop valve 8 and second stop valve 9 successively;
(2) open first stop valve 8, make the testing sample that embodiment 1 makes flow into first container 1, reach 500mL until the oil product of first container 1 through first pipeline 4;
(3) close first stop valve 8; Opening second stop valve 9 makes inert gas (nitrogen) flow through the testing sample (flow 100mL/min-300mL/min) in first container 1; The inert gas that carries sulfuretted hydrogen is contacted with wetting taper lead acetate paper (being close to the inwall setting of funnel) in second container 2, and the feeding time of control inert gas is 1 hour.The tapering of observing the lead acetate paper of taper in the funnel becomes little yellow, shows to detect hydrogen sulfide gas.
Detect embodiment 4
According to accompanying drawing 5 device is connected, the air displacement in will installing with high pure nitrogen is clean, and uses testing sample that preparation embodiment 1 makes as oil product, and concrete steps are following:
(1) first T-valve 7 is switched to the bottom of first container 1 is communicated with; Second T-valve 10 switched to first pipeline 4 be communicated with; Open first stop valve 8 and second stop valve 9, inert gas source (nitrogen) is communicated with second stop valve 9, inert gas is flowed out through second pipeline 5, first pipeline 4, first container 1 and second container 2 and from the 3rd pipeline 6 successively; And inert gas is flowed out successively through second pipeline 5, first pipeline 4 and first stop valve 8; Go out air wherein with inert gas replacement, close first stop valve 8, and second stop valve 9 switched to the 4th pipeline 11 be communicated with;
(2) open first stop valve 8, make the testing sample that embodiment 1 makes flow into first container 1, reach 500mL until the oil product of first container 1 through first pipeline 4;
(3) close first stop valve 8; Opening second stop valve 9 makes inert gas (nitrogen) flow through the testing sample (flow 100mL/min-300mL/min) in first container 1; The inert gas that carries sulfuretted hydrogen is contacted with wetting taper lead acetate paper (being close to the inwall setting of funnel) in second container 2, and the feeding time of control inert gas is 1 hour.The tapering of observing the lead acetate paper of taper in the funnel becomes little yellow, shows to detect hydrogen sulfide gas.
Can find out that through above embodiment pick-up unit provided by the invention and detection method can detect exist (the reaching 0.05 μ g/g) of the lower sulfuretted hydrogen of content, thereby have enlarged the sensing range to petroleum products.
Claims (18)
1. pick-up unit; This device comprises first container (1) and second container (2); First container (1) and second container (2) are communicated with through conduit (3); And two ports of conduit (3) lay respectively at the top of first container (1) and the bottom of second container (2), and wherein, said pick-up unit also comprises first pipeline (4), second pipeline (5) and the 3rd pipeline (6); One end of first pipeline (4) is communicated with the bottom of first container (1); The end to end that is communicated with from the bottom with first container (1) of first pipeline (4) is disposed with first T-valve (7) and first stop valve (8), is communicated with between first stop valve (8) of second pipeline (5) one ends and first pipeline (4) and first T-valve (7), and second pipeline (5) is provided with second stop valve (9); One end of the 3rd pipeline (6) is communicated with the top of second container (2), is provided with in second container (2) to detect test paper (15).
2. device according to claim 1, wherein, second pipeline (5) is provided with second T-valve (10), is communicated with between first stop valve (8) of outlet of second pipeline (5) one ends through second T-valve (10) and first pipeline (4) and first T-valve (7).
3. device according to claim 2, wherein, this device also comprises the 4th pipeline (11); One end of the 4th pipeline (11) is communicated with another outlet of second T-valve (10), is communicated with between the other end of the 4th pipeline (11) and the two ends of the 3rd pipeline (6).
4. device according to claim 1; Wherein, first container (1) is for having the stopple coupon of scale, and the bottom of stopple coupon is provided with first gas distributor (12); First gas distributor (12) is an orifice plate; Orifice plate is provided with a plurality of through holes (13), and through hole (13) diameter is 0.2-2mm, and the total sectional area of a plurality of through holes (13) is the 1-75% of orifice plate single face area.
5. device according to claim 4, wherein, through hole (13) diameter is 0.5-1mm, the total sectional area of a plurality of through holes (13) is the 1-50% of orifice plate single face area.
6. device according to claim 1, wherein, the bottom of second container (2) is provided with second gas distributor (14), and second gas distributor (14) is positioned at the port top of the conduit (3) of second container (2) bottom; Detect test paper (15) for by the lead acetate paper of the bar shaped of water-wet and be positioned at the top of second container (2).
7. device according to claim 6, wherein, second gas distributor (14) is a surface plate.
8. device according to claim 1, wherein, the bottom of second container (2) is provided with funnel, and detecting test paper (15) is that lead acetate paper and the inwall of being close to funnel are placed, and the lower port of funnel is communicated with conduit (3).
9. the detection method of sulfuretted hydrogen in the oil product; This method comprises to be introduced the oil product that contains sulfuretted hydrogen in first container quantitatively; Make inert gas flow through the oil product that contains sulfuretted hydrogen in first container, the inert gas flow that carries sulfuretted hydrogen is contacted, wherein with detection test paper in second container; This method also comprise introduce the oil product that contains sulfuretted hydrogen in first container quantitatively before, with the air in inert gas replacement first container and second container.
10. method according to claim 9, wherein, this method uses a kind of pick-up unit to carry out; This device comprises first container (1) and second container (2); First container (1) and second container (2) are communicated with through conduit (3), and two ports of conduit (3) lay respectively at the top of first container (1) and the bottom of second container (2), wherein; Said pick-up unit also comprises first pipeline (4), second pipeline (5) and the 3rd pipeline (6); One end of first pipeline (4) is communicated with the bottom of first container (1), and the end to end that is communicated with from the bottom with first container (1) of first pipeline (4) is disposed with first T-valve (7) and first stop valve (8), is communicated with between first stop valve (8) of second pipeline (5) one ends and first pipeline (4) and first T-valve (7); Second pipeline (5) is provided with second stop valve (9); One end of the 3rd pipeline (6) is communicated with the top of second container (2), is provided with in second container (2) to detect test paper (15), and this method comprises:
First T-valve (7) switched to the bottom of first container (1) be communicated with; Open first stop valve (8) and second stop valve (9); Inert gas source is communicated with second stop valve (9); Inert gas is flowed out through second pipeline (5), first pipeline (4), first container (1) and second container (2) and from the 3rd pipeline (6) successively; And inert gas is flowed out through second pipeline (5), first pipeline (4) and first stop valve (8) successively, and go out air wherein with inert gas replacement, close first stop valve (8) and second stop valve (9) successively;
Open first stop valve (8), make the oil product that contains sulfuretted hydrogen flow into first container (1), reach scheduled volume until the oil product of first container (1) through first pipeline (4); Close first stop valve (8), open second stop valve (9) and make inert gas flow through the oil product that contains sulfuretted hydrogen in first container (1), the inert gas that carries sulfuretted hydrogen is contacted with detection test paper (15) in second container (2).
11. method according to claim 9; Wherein, this method uses a kind of pick-up unit to carry out, and this device comprises first container (1) and second container (2); First container (1) and second container (2) are communicated with through conduit (3); And two ports of conduit (3) lay respectively at the top of first container (1) and the bottom of second container (2), and wherein, said pick-up unit also comprises first pipeline (4), second pipeline (5) and the 3rd pipeline (6); One end of first pipeline (4) is communicated with the bottom of first container (1); The end to end that is communicated with from the bottom with first container (1) of first pipeline (4) is disposed with first T-valve (7) and first stop valve (8), is communicated with between first stop valve (8) of second pipeline (5) one ends and first pipeline (4) and first T-valve (7), and second pipeline (5) is provided with second stop valve (9); One end of the 3rd pipeline (6) is communicated with the top of second container (2); Be provided with in second container (2) and detect test paper (15), wherein, second pipeline (5) is provided with second T-valve (10); Be communicated with between first stop valve (8) of outlet of second pipeline (5) one ends through second T-valve (10) and first pipeline (4) and first T-valve (7), this device also comprises the 4th pipeline (11); One end of the 4th pipeline (11) is communicated with another outlet of second T-valve (10), is communicated with between the other end of the 4th pipeline (11) and the two ends of the 3rd pipeline (6), and this method comprises:
First T-valve (7) switched to the bottom of first container (1) be communicated with; Second T-valve (10) switched to first pipeline (4) be communicated with; Open first stop valve (8) and second stop valve (9), inert gas source is communicated with second stop valve (9), inert gas is flowed out through second pipeline (5), first pipeline (4), first container (1) and second container (2) and from the 3rd pipeline (6) successively; And inert gas is flowed out successively through second pipeline (5), first pipeline (4) and first stop valve (8); Go out air wherein with inert gas replacement, close first stop valve (8), and second stop valve (9) switched to the 4th pipeline (11) be communicated with;
Open first stop valve (8), make the oil product that contains sulfuretted hydrogen flow into first container (1), reach scheduled volume until the oil product of first container (1) through first pipeline (4); Close first stop valve (8), open second stop valve (9) and make inert gas flow through the oil product that contains sulfuretted hydrogen in first container (1), the inert gas that carries sulfuretted hydrogen is contacted with detection test paper (15) in second container (2).
12. according to claim 10 or 11 described methods; Wherein, this method also comprises: make the oil product that contains sulfuretted hydrogen flow into first container (1) before, switch first T-valve (7); First pipeline is communicated with another outlet of first T-valve (7), the oil product that part contains sulfuretted hydrogen is flowed out.
13. according to claim 10 or 11 described methods, wherein, first holds (1) for having the stopple coupon of scale, the bottom of stopple coupon is provided with gas distributor.
14. according to claim 10 or 11 described methods, wherein, first gas distributor (12) is an orifice plate, orifice plate is provided with a plurality of through holes (13), and through hole (13) diameter is 0.2-2mm, and the total sectional area of a plurality of through holes (13) is the 1-75% of orifice plate single face area.
15. method according to claim 14, wherein, through hole (13) diameter is 0.5-1mm, and the total sectional area of a plurality of through holes (13) is the 1-50% of orifice plate single face area.
16. according to claim 10 or 11 described methods, wherein, the bottom of second container (2) is provided with second gas distributor (14), second gas distributor (14) is positioned at the port top of the conduit (3) of second container (2) bottom; Detect test paper (15) for by the lead acetate paper of the bar shaped of water-wet and be positioned at the top of second container (2).
17. method according to claim 16, wherein, second gas distributor (14) is a surface plate.
18. according to claim 10 or 11 described methods, wherein, the bottom of second container (2) is provided with funnel, detecting test paper (15) is that lead acetate paper and the inwall of being close to funnel are placed, and the lower port of funnel is communicated with conduit (3).
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| CN108318550A (en) * | 2017-12-27 | 2018-07-24 | 中华人民共和国大榭出入境检验检疫局 | The detection device and detection method of hydrogen sulfide in a kind of fluid oil |
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