CN103472180B - Sampling and component-analyzing system of natural gas dewatered by molecular sieve - Google Patents
Sampling and component-analyzing system of natural gas dewatered by molecular sieve Download PDFInfo
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- CN103472180B CN103472180B CN201310456027.7A CN201310456027A CN103472180B CN 103472180 B CN103472180 B CN 103472180B CN 201310456027 A CN201310456027 A CN 201310456027A CN 103472180 B CN103472180 B CN 103472180B
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Abstract
The invention discloses a sampling and component-analyzing system of natural gas dewatered by a molecular sieve. In the system, a sampling probe is arranged at one end of a sampling pipeline and is connected with a natural gas pipeline, and the another end of the sampling pipeline is connected with a preceding stage processing device. Dewatered natural gas samples are conveyed into the preceding stage processing device for heat preservation and pressure reduction. A tracing pipe is connected between the preceding stage processing device and a pre-processing device. The dewatered natural gas samples going through heat insulation and pressure production in the preceding stage processing device are conveyed into the pre-processing device for pre-treatment. The dewatered natural gas samples going through the pre-treatment enter a first gas chromatograph used for measuring N2, C6+ components and a second gas chromatograph used for measuring components containing low-range S compounds and low-range CO2 components for analysis, and the content of all the components in the dewatered natural gas samples is further obtained.
Description
Technical field
The present invention relates to area of natural gas liquefaction, in particular to the rock gas sampling after a kind of molecular sieve dehydration and component analysis system.
Background technology
In present world energy sources production, rock gas accounts for 1/3, and likely progressively instantly very popular oil and coal is extruded into back burner in the near future.Before the year two thousand twenty, the ratio of rock gas in world's energy demand will reach 45%-50%.
Liquefied natural gas (LNG) (Liquefied Natural Gas, LNG) be natural gas via compression, be cooled to its boiling point (-161.5 degrees Celsius) temperature after the liquid that becomes, its principal ingredient is methane, being recognized is the energy the cleanest on the earth, colourless, tasteless, nontoxic and non-corrosiveness, its volume is about with amount gaseous natural gas volume 1/600, and the weight of liquefied natural gas (LNG) is only about 45% of consubstantiality ponding.The manufacture process of liquefied natural gas (LNG) is first by the natural gas purification processing that gas field produces, and obtains through a succession of ultralow temperature post liquefaction.
Current, middle-size and small-size natural gas liquefaction device, if scale is 200 × 10
4nm
3/ d(normal cubic metre/sky) natural gas liquefaction device, still belong to pioneering at home, in the process of natural gas liquefaction, if the component concentration of rock gas in liquefaction each stage can be obtained in real time, measure is targetedly taked to provide foundation the purification to follow-up phase, liquefaction process, but the how component in centering small-scaled natural gas liquification device gas deliquescence process each stage, as the content of component each in the rock gas after molecular sieve dehydration, carry out real-time analysis, obtain the content of each component accurately in raw natural gas, be still a problem.
Summary of the invention
The invention provides the sampling of the rock gas after a kind of molecular sieve dehydration and component analysis system, in order to analyze the content of each component in the rock gas sample after the dehydration of gas deliquescence process Middle molecule sieve.
For achieving the above object, the invention provides the sampling of the rock gas after a kind of molecular sieve dehydration and component analysis system, this system comprises: gas pipeline, sampling line, prime treating apparatus, trace pipe, pretreatment unit, the first gas chromatograph, the second gas chromatograph, instrument wind apparatus, carrier gas device, FID/FPD chromatograph device of air and retracting device, wherein:
One end of described sampling line is provided with sample probe, and described sample probe is connected with described gas pipeline, obtains the rock gas sample after the dehydration in described gas pipeline;
The other end of described sampling line is connected with described prime treating apparatus, rock gas sample after obtained dehydration is sent into described prime treating apparatus be incubated, decompression, wherein said prime treating apparatus comprises prime process casing, prime process pipeline, filtrator, electricity chuck variable valve and the first electric heater, described prime process pipeline is arranged in described prime process casing, one end of described prime process pipeline is connected with described sampling line, described filtrator and described electric chuck variable valve are successively set on described prime process pipeline, rock gas sample after dehydration is incubated through described electric chuck variable valve after described metre filter, decompression, the first electric heater is provided with in described prime process casing, heating and thermal insulation is carried out to described prime process casing,
Between the other end that described trace pipe is connected to described prime process pipeline and described pretreatment unit, will through described prime treating apparatus insulation, rock gas sample after post-decompression dehydration is sent into described pretreatment unit and is carried out pre-service, wherein said pretreatment unit comprises pre-service casing, pre-service pipeline, coalescer, decompression valve, liquid knockout, safety line, three-way switch valve, detailed catalogue filtrator, first bypass flow meter and the second electric heater, described pre-service pipeline is arranged in described pre-service casing, one end of described pre-service pipeline is connected with described trace pipe, described coalescer, described decompression valve, described liquid knockout, described three-way switch valve, described detailed catalogue filtrator and described first bypass flow meter are successively set on described pre-service pipeline, enter the rock gas sample after the dehydration of described pre-service pipeline after described coalescer filters out impurities, to enter described decompression valve reduce pressure, rock gas sample after post-decompression dehydration enters described detailed catalogue filtrator by described three-way switch valve and filters, the other end of described pre-service pipeline respectively with the first sample gas air inlet pipeline of described first gas chromatograph, second sample gas air inlet pipeline of described second gas chromatograph is connected, described first sample gas air inlet pipeline, described second sample gas air inlet pipeline is disposed with respectively sampling switch valve and sampling switch valve, described first bypass flow meter is arranged on the end of described pre-service pipeline, the rock gas sample controlled after dehydration enters to measure N
2, C6+ component described first gas chromatograph and in order to measure containing lower range S compound, lower range CO
2flow when described second gas chromatograph of component is analyzed, described second electric heater is arranged in described pre-service casing, heats described pre-service casing,
The bottom of described coalescer is connected with return pipeline, and the rock gas sample after dehydration unnecessary in described coalescer is back to process fuel system by described return pipeline, described return pipeline is disposed with the second bypass flow meter and non-return valve;
Described safety line is connected between the downstream of described non-return valve on the upstream of described three-way switch valve on described pre-service pipeline and described return pipeline, described safety line is provided with safety valve, when exceeding setting value in order to the pressure in the described pre-service pipeline before described three-way switch valve, the pressure in described pre-service pipeline is passed by described safety line and rushes down in described return pipeline;
The bottom of described liquid knockout is connected with the first discharging tube road, and described first discharging tube road is provided with controlled valve;
The first end of described three-way switch valve is connected with described liquid knockout, second end of described three-way switch valve is connected with described detailed catalogue filtrator, filtered by detailed catalogue filtrator described in rock gas Sample introduction after the dehydration of removing after liquid through described liquid knockout, the 3rd end of described three-way switch valve is connected with calibrating gas pipeline;
Described retracting device comprises discharge manifold, first blowdown piping, second blowdown piping, second discharging tube road and the 3rd discharging tube road, described first blowdown piping, described second blowdown piping is connected to the drain of described first gas chromatograph, between the drain of described second gas chromatograph and described discharge manifold, described second discharging tube road, described 3rd discharging tube road respectively with described first gas chromatograph, the drain of described second gas chromatograph is connected, described discharge manifold is provided with and reclaims gas interface and drain, controlled valve is respectively arranged with before wherein said recovery gas interface and described drain,
Described instrument wind apparatus comprises instrument wind house steward, instrument wind interface, the first transfer tube, the second transfer tube, wherein, described instrument wind interface is arranged on one end of described instrument wind house steward, be provided with controlled valve before described instrument wind interface, described first transfer tube, described second transfer tube are connected between described instrument wind house steward and described first gas chromatograph, described second gas chromatograph;
Described carrier gas device comprises the first carrier gas tank, the second carrier gas tank, the first carrier gas transfer pipe and the second carrier gas transfer pipe, wherein, described first carrier gas transfer pipe, described second carrier gas transfer pipe are connected to described first gas chromatograph and described first carrier gas tank, between described second gas chromatograph and described second carrier gas tank, described first carrier gas transfer pipe and described second carrier gas transfer pipe are respectively arranged with controlled valve;
Described FID/FPD chromatograph device of air comprises a FID/FPD chromatograph gas tank, 2nd FID/FPD chromatograph gas tank, one FID/FPD chromatograph use gas transfer tube and the 2nd FID/FPD chromatograph gas transfer tube, wherein, a described FID/FPD chromatograph gas transfer tube, described 2nd FID/FPD chromatograph gas transfer tube is connected to described first gas chromatograph and a described FID/FPD chromatograph gas tank, between described second gas chromatograph and described 2nd FID/FPD chromatograph gas tank, a described FID/FPD chromatograph gas transfer tube and described 2nd FID/FPD chromatograph gas transfer tube are respectively arranged with controlled valve.
Optionally, described first transfer tube, described second transfer tube are respectively arranged with air purifier.
Optionally, the described pre-service pipeline between described three-way switch valve and described detailed catalogue filtrator is connected with the arm of sample tap, described arm is provided with controlled valve.
Optionally, the described pre-service pipeline between described coalescer and described liquid knockout is provided with pressure indication valve door.
Optionally, the inlet end of described prime process pipeline is provided with controlled valve.
Optionally, the inlet end of described pre-service pipeline is disposed with controlled valve and pressure indicating instrument.
Optionally, described first carrier gas tank, described second carrier gas tank are respectively 2, each described first carrier gas tank, described second carrier gas tank are respectively arranged with two pressure indicator and valve.
Optionally, a described FID/FPD chromatograph gas tank, described 2nd FID/FPD chromatograph gas tank are respectively 2, each described FID/FPD chromatograph gas tank, described 2nd FID/FPD chromatograph gas tank are respectively arranged with two pressure indicator and valve.
Optionally, described first transfer tube, described second transfer tube are respectively 1 ＂ pipe.
In the above-described embodiments, the rock gas sample after the dehydration that the gas pipeline after molecular sieve dehydration samples out delivers to prime treating apparatus via sampling line, through insulation in prime treating apparatus, after decompression, by Pressure Drop in pipe to 3.0Kg/cm
2afterwards from prime treating apparatus out, through trace pipe road by dehydration after rock gas sample delivery to pretreatment unit, after entering pretreatment unit, rock gas sample after dehydration filters out impurity through coalescer and delivers to second depressurized variable valve, is decompressed to the inlet pressure requirements (about 1.0 ~ 3.0Kg/cm of gas chromatograph
2), in addition unnecessary sample gas is back in process fuel system through return pipeline, simultaneously by being provided with the safety line of safety valve in case hypertonia.Rock gas sample after the dehydration of second depressurized enters liquid knockout, liquid in gas is removed, again the rock gas sample after the dehydration after removing liquid is delivered to three-way switch valve, a wherein road access gas pipeline of three-way switch valve, rock gas sample after dehydration is directed at detailed catalogue filtrator and filters by another road, rock gas sample after dehydration after filtering is again through the first bypass flow meter, enter the first gas chromatograph, second gas chromatograph carries out component analysis, obtain the content of each component in the rock gas sample after dewatering, thus be the purification of raw natural gas follow-up phase, liquefaction process takes measure targetedly to provide foundation.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is that the rock gas after the molecular sieve dehydration of one embodiment of the invention samples and component analysis system structural drawing.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not paying the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is that the rock gas after the molecular sieve dehydration of one embodiment of the invention samples and component analysis system structural drawing.As shown in the figure, this system comprises: gas pipeline 1, sampling line 2, prime treating apparatus 3, trace pipe, pretreatment unit 20, first gas chromatograph 36, second gas chromatograph 37, instrument wind apparatus, carrier gas device, FID/FPD chromatograph device of air and retracting device, wherein:
One end of sampling line 2 is provided with sample probe, and sample probe is connected with gas pipeline 1, obtains the rock gas sample after the dehydration in gas pipeline 1;
The other end of sampling line 2 is connected with prime treating apparatus 3, rock gas sample after obtained dehydration is sent into prime treating apparatus 3 be incubated, decompression, wherein prime treating apparatus 3 comprises prime process casing, prime process pipeline, filtrator 4, electricity chuck variable valve 5 and the first electric heater 6, prime process pipeline is arranged in prime process casing, one end of prime process pipeline is connected with sampling line 2, filtrator 4 and electric chuck variable valve 5 are successively set on prime process pipeline, rock gas sample after dehydration is incubated through electric chuck variable valve 5 after filtrator 4 filters, decompression (is generally down to 3.0Kg/cm
2), be provided with the first electric heater 6 in prime process casing, heating and thermal insulation is carried out to prime process casing,
Between the other end that trace pipe is connected to prime process pipeline and pretreatment unit 20, will be incubated through prime treating apparatus 3, rock gas sample after post-decompression dehydration is sent into pretreatment unit 20 and is carried out pre-service, and wherein pretreatment unit 20 comprises pre-service casing, pre-service pipeline, coalescer 10, decompression valve, liquid knockout 12, safety line, three-way switch valve 14, detailed catalogue filtrator 17, first bypass flow meter 18 and the second electric heater 16, pre-service pipeline is arranged in pre-service casing, and one end of pre-service pipeline is connected with trace pipe, coalescer 10, decompression valve, liquid knockout 12, three-way switch valve 14, detailed catalogue filtrator 17 and the first bypass flow meter 18 are successively set on pre-service pipeline, enter the rock gas sample after the dehydration of pre-service pipeline and after coalescer 10 filters out impurities, enter decompression valve carry out second depressurized and (reduce to and can meet the first gas chromatograph 36, the inlet pressure requirements of the second gas chromatograph 37, about 1.0 ~ 3.0Kg/cm
2), rock gas sample after post-decompression dehydration enters detailed catalogue filtrator 17 by three-way switch valve 14 and filters, the other end of pre-service pipeline respectively with the first sample gas air inlet pipeline of the first gas chromatograph 36, second sample gas air inlet pipeline (not shown) of the second gas chromatograph 37 is connected, first sample gas air inlet pipeline is disposed with the first sampling switch valve 22 and first and samples switch valve 23(in a preferred embodiment, first sampling switch valve 23 also can connect other pipeline 24 for sampling, and the sample gas in the pipeline that will analyze is selected by the sampling switch valve on each pipeline), second sample gas air inlet pipeline is disposed with the second sampling switch valve and the second sampling switch valve (not shown), first bypass flow meter 18 is arranged on the end of pre-service pipeline, the rock gas sample controlled after dehydration enters to measure N
2, C6+ component the first gas chromatograph 36 and in order to measure containing lower range S compound, lower range CO
2flow when second gas chromatograph 37 of component is analyzed, the second electric heater 16 is arranged in pre-service casing, heats pre-service casing,
The bottom of coalescer 10 is connected with return pipeline, rock gas sample after dehydration unnecessary in coalescer 10 is back to process fuel system (in figure, 7 is the interface of the process fuel pipe of return pipeline and process fuel system) by return pipeline, return pipeline is disposed with the second bypass flow meter 9 and non-return valve 8, is convenient to pipeline and controls;
Safety line is connected between the upstream of three-way switch valve 14 on pre-service pipeline and the downstream of return pipeline upper check valve 8, safety line is provided with safety valve 11, when exceeding setting value in order to the pressure in the pre-service pipeline before three-way switch valve 14, the pressure in pre-service pipeline is passed by safety line and rushes down in return pipeline;
The bottom of liquid knockout 12 and the first discharging tube road (in figure, 13 is the drain on the first discharging tube road) are connected, and the first discharging tube road is provided with controlled valve;
The first end of three-way switch valve 14 is connected with liquid knockout 12, second end of three-way switch valve 14 is connected with detailed catalogue filtrator 17, filter removing the rock gas Sample introduction detailed catalogue filtrator 17 after the dehydration after liquid through liquid knockout 12,3rd end of three-way switch valve 14 is connected with calibrating gas pipeline, in figure, 19 is the gas tank be connected with calibrating gas pipeline, gas tank 19 is provided with two pressure indicator and valve, in addition, calibrating gas pipeline also can be provided with controlled valve;
Retracting device comprises discharge manifold 25, first blowdown piping 30, second blowdown piping (not shown), second discharging tube road 31 and the 3rd discharging tube road (not shown), first blowdown piping 30, second blowdown piping is connected to the drain of the first gas chromatograph 36, between the drain of the second gas chromatograph 37 and discharge manifold 25, second discharging tube road 31, 3rd discharging tube road respectively with the first gas chromatograph 36, the drain of the second gas chromatograph 37 is connected, discharge manifold 25 is provided with and reclaims gas interface 21 and drain 26, controlled valve is respectively arranged with before wherein reclaiming gas interface 21 and drain 26, can be controlled through the first gas chromatograph 36 by controlled valve, the recovery of the rock gas sample after the analysis of the second gas chromatograph 37 measures or emptying,
Instrument wind apparatus comprises instrument wind house steward 28, instrument wind interface 29, first transfer tube 27, second transfer tube (not shown), wherein, instrument wind interface 29 is arranged on one end of instrument wind house steward 28, be disposed with controlled valve and pressure-regulating valve before instrument wind interface 29, the first transfer tube 27, second transfer tube is connected between instrument wind house steward 28 and the first gas chromatograph 36, second gas chromatograph 37;
Carrier gas device comprises the first carrier gas tank 35, second carrier gas tank (not shown), first carrier gas transfer pipe and the second carrier gas transfer pipe (not shown), wherein, first carrier gas transfer pipe, second carrier gas transfer pipe is connected to the first gas chromatograph 36 and the first carrier gas tank 35, between second gas chromatograph 37 and the second carrier gas tank, first carrier gas transfer pipe and the second carrier gas transfer pipe are respectively arranged with controlled valve, in addition, first transfer tube 27, second transfer tube also can be respectively arranged with the first air purifier 33 and the second air purifier (not shown), in order to purify the instrument wind be blown into, first transfer tube 27, second transfer tube can be 1 ＂ pipe respectively,
FID/FPD chromatograph device of air comprises a FID/FPD chromatograph gas tank 34, 2nd FID/FPD chromatograph gas tank (not shown), one FID/FPD chromatograph use gas transfer tube and the 2nd FID/FPD chromatograph use gas transfer tube (not shown), wherein, one FID/FPD chromatograph gas transfer tube, 2nd FID/FPD chromatograph gas transfer tube is connected to the first gas chromatograph 36 and a FID/FPD chromatograph gas tank 34, between second gas chromatograph 37 and the 2nd FID/FPD chromatograph gas tank, one FID/FPD chromatograph gas transfer tube and the 2nd FID/FPD chromatograph gas transfer tube are respectively arranged with controlled valve.
Such as, the pre-service pipeline between three-way switch valve 14 and detailed catalogue filtrator 17 is also connected with the arm of sample tap 15, arm is provided with controlled valve, to carry out sample analysis to the rock gas sample after dehydration from pre-service pipeline.
Such as, the pre-service pipeline between coalescer 10 and liquid knockout 12 can be provided with pressure indication valve door, be convenient to the pressure in real time inspection this section of pre-service pipeline.
Such as, the inlet end of prime process pipeline also can be provided with controlled valve, thus can control the sampling of sampling line flexibly.
Such as, the inlet end of pre-service pipeline also can be disposed with controlled valve and pressure indicating instrument, thus can regulate controlled valve by the pressure indicated by pressure indicating instrument.
Such as, the first carrier gas tank, the second carrier gas tank can also be respectively arranged with 2, each first carrier gas tank, the second carrier gas tank are provided with two pressure indicator and valve, are convenient to user and regulate according to the flow velocity of pressure to carrier gas of instruction.
Such as, one FID/FPD chromatograph gas tank, the 2nd FID/FPD chromatograph gas tank also can be respectively arranged with 2, each FID/FPD chromatograph gas tank, the 2nd FID/FPD chromatograph gas tank are provided with two pressure indicator and valve, are convenient to user and regulate according to the flow velocity of pressure to FID/FPD chromatograph gas of instruction.
In the above-described embodiments, the rock gas sample after the dehydration that the gas pipeline after molecular sieve dehydration samples out delivers to prime treating apparatus via sampling line, through insulation in prime treating apparatus, after decompression, by Pressure Drop in pipe to 3.0Kg/cm
2afterwards from prime treating apparatus out, through trace pipe road by dehydration after rock gas sample delivery to pretreatment unit, after entering pretreatment unit, rock gas sample after dehydration filters out impurity through coalescer and delivers to second depressurized variable valve, is decompressed to the inlet pressure requirements (about 1.0 ~ 3.0Kg/cm of gas chromatograph
2), in addition unnecessary sample gas is back in process fuel system through return pipeline, simultaneously by being provided with the safety line of safety valve in case hypertonia.Rock gas sample after the dehydration of second depressurized enters liquid knockout, liquid in gas is removed, again the rock gas sample after the dehydration after removing liquid is delivered to three-way switch valve, a wherein road access gas pipeline of three-way switch valve, rock gas sample after dehydration is directed at detailed catalogue filtrator and filters by another road, rock gas sample after dehydration after filtering is again through the first bypass flow meter, enter the first gas chromatograph, second gas chromatograph carries out component analysis, obtain the content of each component in the rock gas sample after dewatering, thus be the purification of raw natural gas follow-up phase, liquefaction process takes measure targetedly to provide foundation.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
One of ordinary skill in the art will appreciate that: the module in the device in embodiment can describe according to embodiment and be distributed in the device of embodiment, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in previous embodiment, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of embodiment of the present invention technical scheme.
Claims (9)
1. the rock gas sampling after a molecular sieve dehydration and component analysis system, it is characterized in that, comprise: gas pipeline, sampling line, prime treating apparatus, trace pipe, pretreatment unit, the first gas chromatograph, the second gas chromatograph, instrument wind apparatus, carrier gas device, FID/FPD chromatograph device of air and retracting device, wherein:
One end of described sampling line is provided with sample probe, and described sample probe is connected with described gas pipeline, obtains the rock gas sample after the dehydration in described gas pipeline;
The other end of described sampling line is connected with described prime treating apparatus, rock gas sample after obtained dehydration is sent into described prime treating apparatus be incubated, decompression, wherein said prime treating apparatus comprises prime process casing, prime process pipeline, filtrator, electricity chuck variable valve and the first electric heater, described prime process pipeline is arranged in described prime process casing, one end of described prime process pipeline is connected with described sampling line, described filtrator and described electric chuck variable valve are successively set on described prime process pipeline, rock gas sample after dehydration is incubated through described electric chuck variable valve after described metre filter, decompression, the first electric heater is provided with in described prime process casing, heating and thermal insulation is carried out to described prime process casing,
Between the other end that described trace pipe is connected to described prime process pipeline and described pretreatment unit, will through described prime treating apparatus insulation, rock gas sample after post-decompression dehydration is sent into described pretreatment unit and is carried out pre-service, wherein said pretreatment unit comprises pre-service casing, pre-service pipeline, coalescer, decompression valve, liquid knockout, safety line, three-way switch valve, detailed catalogue filtrator, first bypass flow meter and the second electric heater, described pre-service pipeline is arranged in described pre-service casing, one end of described pre-service pipeline is connected with described trace pipe, described coalescer, described decompression valve, described liquid knockout, described three-way switch valve, described detailed catalogue filtrator and described first bypass flow meter are successively set on described pre-service pipeline, enter the rock gas sample after the dehydration of described pre-service pipeline after described coalescer filters out impurities, to enter described decompression valve reduce pressure, rock gas sample after post-decompression dehydration enters described detailed catalogue filtrator by described three-way switch valve and filters, the other end of described pre-service pipeline respectively with the first sample gas air inlet pipeline of described first gas chromatograph, second sample gas air inlet pipeline of described second gas chromatograph is connected, described first sample gas air inlet pipeline, described second sample gas air inlet pipeline is disposed with respectively sampling switch valve and sampling switch valve, described first bypass flow meter is arranged on the end of described pre-service pipeline, the rock gas sample controlled after dehydration enters to measure N
2, C6+ component described first gas chromatograph and in order to measure containing lower range S compound, lower range CO
2flow when described second gas chromatograph of component is analyzed, described second electric heater is arranged in described pre-service casing, heats described pre-service casing,
The bottom of described coalescer is connected with return pipeline, and the rock gas sample after dehydration unnecessary in described coalescer is back to process fuel system by described return pipeline, described return pipeline is disposed with the second bypass flow meter and non-return valve;
Described safety line is connected between the downstream of described non-return valve on the upstream of described three-way switch valve on described pre-service pipeline and described return pipeline, described safety line is provided with safety valve, when exceeding setting value in order to the pressure in the described pre-service pipeline before described three-way switch valve, the pressure in described pre-service pipeline is passed by described safety line and rushes down in described return pipeline;
The bottom of described liquid knockout is connected with the first discharging tube road, and described first discharging tube road is provided with controlled valve;
The first end of described three-way switch valve is connected with described liquid knockout, second end of described three-way switch valve is connected with described detailed catalogue filtrator, filtered by detailed catalogue filtrator described in rock gas Sample introduction after the dehydration of removing after liquid through described liquid knockout, the 3rd end of described three-way switch valve is connected with calibrating gas pipeline;
Described retracting device comprises discharge manifold, first blowdown piping, second blowdown piping, second discharging tube road and the 3rd discharging tube road, described first blowdown piping, described second blowdown piping is connected to the drain of described first gas chromatograph, between the drain of described second gas chromatograph and described discharge manifold, described second discharging tube road, described 3rd discharging tube road respectively with described first gas chromatograph, the drain of described second gas chromatograph is connected, described discharge manifold is provided with and reclaims gas interface and drain, controlled valve is respectively arranged with before wherein said recovery gas interface and described drain,
Described instrument wind apparatus comprises instrument wind house steward, instrument wind interface, the first transfer tube, the second transfer tube, wherein, described instrument wind interface is arranged on one end of described instrument wind house steward, be provided with controlled valve before described instrument wind interface, described first transfer tube, described second transfer tube are connected between described instrument wind house steward and described first gas chromatograph, described second gas chromatograph;
Described carrier gas device comprises the first carrier gas tank, the second carrier gas tank, the first carrier gas transfer pipe and the second carrier gas transfer pipe, wherein, described first carrier gas transfer pipe, described second carrier gas transfer pipe are connected to described first gas chromatograph and described first carrier gas tank, between described second gas chromatograph and described second carrier gas tank, described first carrier gas transfer pipe and described second carrier gas transfer pipe are respectively arranged with controlled valve;
Described FID/FPD chromatograph device of air comprises a FID/FPD chromatograph gas tank, 2nd FID/FPD chromatograph gas tank, one FID/FPD chromatograph use gas transfer tube and the 2nd FID/FPD chromatograph gas transfer tube, wherein, a described FID/FPD chromatograph gas transfer tube, described 2nd FID/FPD chromatograph gas transfer tube is connected to described first gas chromatograph and a described FID/FPD chromatograph gas tank, between described second gas chromatograph and described 2nd FID/FPD chromatograph gas tank, a described FID/FPD chromatograph gas transfer tube and described 2nd FID/FPD chromatograph gas transfer tube are respectively arranged with controlled valve.
2. system according to claim 1, is characterized in that, described first transfer tube, described second transfer tube are respectively arranged with air purifier.
3. system according to claim 1, is characterized in that, the described pre-service pipeline between described three-way switch valve and described detailed catalogue filtrator is connected with the arm of sample tap, described arm is provided with controlled valve.
4. system according to claim 1, is characterized in that, the described pre-service pipeline between described coalescer and described liquid knockout is provided with pressure indication valve door.
5. system according to claim 1, is characterized in that, the inlet end of described prime process pipeline is provided with controlled valve.
6. system according to claim 1, is characterized in that, the inlet end of described pre-service pipeline is disposed with controlled valve and pressure indicating instrument.
7. system according to claim 1, is characterized in that, described first carrier gas tank, described second carrier gas tank are respectively 2, each described first carrier gas tank, described second carrier gas tank is respectively arranged with two pressure indicator and valve.
8. system according to claim 1, it is characterized in that, a described FID/FPD chromatograph gas tank, described 2nd FID/FPD chromatograph gas tank are respectively 2, each described FID/FPD chromatograph gas tank, described 2nd FID/FPD chromatograph gas tank are respectively arranged with two pressure indicator and valve.
9. system according to claim 1, is characterized in that, described first transfer tube, described second transfer tube are respectively 1 ＂ pipe.
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