CN109781573A - It is a kind of high containing CO2、H2The analogue measurement device and method of water content in the natural gas of S - Google Patents
It is a kind of high containing CO2、H2The analogue measurement device and method of water content in the natural gas of S Download PDFInfo
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- CN109781573A CN109781573A CN201910059904.4A CN201910059904A CN109781573A CN 109781573 A CN109781573 A CN 109781573A CN 201910059904 A CN201910059904 A CN 201910059904A CN 109781573 A CN109781573 A CN 109781573A
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Abstract
The invention discloses a kind of high containing CO2、H2The analogue measurement device and method of water content in the natural gas of S, the simulator includes gas cylinder, main vent, force (forcing) pump, the first drying tube, constant temperature saturation balance pond, demister, equilibrium flash separator, the second drying tube, gas flowmeter and gas chromatograph, main vent entrance is connect with gas cylinder, force (forcing) pump, the first drying tube, constant temperature saturation balance pond, demister, equilibrium flash separator, the second drying tube and gas flowmeter are successively installed on main vent along the direction of main vent entrance to outlet, and gas chromatograph is connect with gas flowmeter.The simulator structure is simple, easy to operate, is easy to make, low manufacture cost.The analogy method relies on above-mentioned apparatus, and simple easily operated, measurement accuracy is high.
Description
Technical field
The present invention relates to natural gas water content amount detection technique fields, and in particular to a kind of high containing CO2、H2Contain in the natural gas of S
The analogue measurement device and method of water.
Background technique
It is growing with natural gas consumption market, CO is contained to height2、H2The exploration and development in the gas field S is gradually brought into schedule.
For from mining site it is mined contain CO2、H2The natural gas of S, the presence of moisture will lead to the acid solution shape with strong corrosive
At causing the corrosion of pipeline, equipment, instrument, also will form Hydrate Plugging pipeline, equipment under certain condition, influence steady
Gas supply.Therefore, when designing oil and gas processing device and pipe-line system, need to know the water content in natural gas.
1987, Karl et al. based in gaseous sample water and karr take iodine in body reagent (pyrrole suddenly/carbinol mixture)
The principle to react with sulfur dioxide is determined natural gas saturation moisture content.
Berg has been put forward for the first time the computation model of quartz capillary flowmeter in 2005.Next year, his result to experiment
It is maked corrections, after 6 gas amendments, the uncertainty that capillary flowmeter measures viscosity is smaller for discovery.
2008, Rushing et al. carried out saturation moisture content experiment test, research in natural gas under high-temperature and high-pressure conditions
CO2Influence to saturation moisture content.Result of study shows with CO2The increase of molar fraction, maximum saturation water content by
It is cumulative to add.Particularly, work as CO2Molar fraction from 5% increase to 20% when, maximum saturation water content increases to 40% from 20%.
2008, Yang Fang et al. application Absorptiometry measured natural gas saturation moisture content, and the accuracy to this method
It is verified with repeatability, achieves more satisfied measurement result.
2010, Tabasinejad et al. surveyed water vapour in CH4、N2And CO2In solubility, but experimental temperature phase
To higher (> 423K).
2011, Seo et al. was surveyed by indirect method rich in CO2Saturation moisture content in gas phase, but experimentation is by low
The limitation of warm low pressure (< 294K, < 10.1MPa) condition.
2011, Zhang Longman et al. determined low-temp low-pressure (< 273K, < using Adjustable Diode Laser absorption spectroscopy
Saturation moisture content in natural gas under the conditions of 13.8MPa), but CO in natural gas2Content is relatively low (< 5%).
2012, Chapoy et al. carried out pure CO2The experiment of middle saturation moisture content, but the lower (< of experimental temperature pressure
278K) and pressure is only 13.8MPa.
2012, ten thousand sign equality people were measured natural gas saturation moisture content using electrolysis method, had formulated reasonable instrument
Device application plan is with the reasonable Instrumentation Operating Areas of determination.decagram
2013, Kim et al. determined rich CO using indirect experiment method2Saturation moisture content in phase, but by low temperature (283-
313K) and the limitation of mesolow (< 20MPa).decagram
Recently, Springer and Wang et al. determine rich CO using near-infrared light-splitting method2It is saturated aqueous in gas phase
Amount, and consider NaCl (or CaCl2) influence, but experimental pressure is fixed on 9MPa, temperature lower than 373K, and contains CO2Natural gas
Hiding thermodynamic fluid condition differs greatly.decagram
Summary of the invention
Based on the above-mentioned prior art, the present invention provides a kind of high containing CO2、H2The analogue measurement of water content in the natural gas of S
Device and method, the simulator structure is simple, easy to operate, is easy to make, low manufacture cost.
The analogy method is simple, easily operated, and measurement accuracy is high.
Realize technical solution used by above-mentioned purpose of the present invention are as follows:
It is a kind of high containing CO2、H2The analogue measurement device of water content in the natural gas of S, including gas cylinder, main vent, pressurization
Pump, the first drying tube, constant temperature saturation balance pond, demister, equilibrium flash separator, the second drying tube, gas flowmeter are gentle
Chromatography, main vent entrance are connect with gas cylinder, force (forcing) pump, the first drying tube, constant temperature saturation balance pond, demister, balance
Flash separator, the second drying tube and gas flowmeter are successively installed on main vent along the direction of main vent entrance to outlet
On, gas chromatograph is connect with gas flowmeter.
It further include pressure regulating device, pressure regulating device includes pressure regulation general pipeline, the first pressure regulation branch pipe, the second pressure regulation branch pipe, the first pressure
Draught control mechanism and second pressure adjuster, one end of pressure regulation general pipeline and main vent be located at constant temperature saturation balance pond and demister it
Between part connection, the other end of pressure regulation general pipeline connect with one end of the first pressure regulation branch pipe and the second pressure regulation branch pipe respectively, first
The other end of pressure regulation branch pipe is connect with first pressure adjuster, and the other end and second pressure adjuster of the second pressure regulation branch pipe connect
It connects.
It further include pressure regulation main valve, the first needle valve and the second needle valve, pressure regulation main valve is installed on pressure regulation general pipeline, the first needle
Type valve is installed on the first pressure regulation branch pipe, and the second needle valve is installed on the second pressure regulation branch pipe.
It further include preprocessor, preprocessor includes in coil pipe and the first constant temperature bath, and the first constant temperature bath is in seal shape, coil pipe
In the first constant temperature bath, the both ends of coil pipe are connect with main vent respectively.5, according to claim 4 high containing CO2、H2S
Natural gas in water content analogue measurement device, it is characterised in that: further include shut-off valve, the first valve, the second valve and
Three valves, shut-off valve are installed on main vent on the part between gas cylinder and booster pump, and it is dry that the first valve is installed on ventilation
It manages on the part between preprocessor and constant temperature saturation balance pond, the second valve is installed on main vent and is located at pressure regulation general pipeline
On part between demister, third valve is installed on main vent and is located at demister and balances the portion between flash separator
On point.
The constant temperature saturation balance pond includes the second constant temperature bath, into pipe, air collecting chamber and discharge pipe, the second water bath with thermostatic control
In seal shape, air collecting chamber is made of hemispherical porous plate and circular top cover, intensive and equally distributed gas collection on porous plate
Hole, the circular open direction of porous plate, for the top opening of porous plate by top seal, air collecting chamber is installed on the second constant temperature bath
In lower part, one end of air inlet pipe is connected to main vent, and the other end is located at the second water bath with thermostatic control bottom, and one end of discharge pipe passes through
Top cover center is located in air collecting chamber, and the other end is connected to main vent.
It further include gas absorbing mechanism, gas absorbing mechanism includes CO2Absorption bottle, H2S absorption bottle and absorption tracheae, ventilation
Main pipe outlet and CO2The connection of absorption bottle entrance, absorbs air pipe inlet and CO2Absorption bottle outlet connection absorbs tracheae outlet and H2S
The connection of absorption bottle entrance.
It is a kind of high containing CO2、H2The analog measurement method of water content, includes the following steps: in the natural gas of S
1, constant temperature saturation balance pond is opened, keeps the temperature in constant temperature saturation balance pond constant at -5-5 DEG C；
2, contain CO equipped with high in gas cylinder2、H2The natural gas of S opens gas cylinder, booster pump, demister, equilibrium flash separator
And gas chromatograph, increasing pump make the pressure P of natural gas；
3, natural gas successively passes through the first drying tube of preprocessor and constant temperature saturation balance pond, by the first drying tube into
Row drying carries out aqueous saturation by constant temperature saturation balance pond；
4, the natural gas after being saturated successively passes through demister, equilibrium flash separator and the second drying tube, first passes through demisting
The water droplet carried secretly in natural gas after device removal saturation, then carries out gas-liquid separation in equilibrium flash separator, condensed
Water droplet continues drying on the bottom of equilibrium flash separator, then through the second drying tube, and the natural gas after drying passes through gas
Quantifier, it is V that aerometer meter, which records its total volume,；
5, a part of natural gas enters gas chromatograph, by gas chromatograph measure each component in natural gas mole point
Number yi；
6, the quality of the bottom condensate water of weighing apparatus flash separator and the quality of drying tube, the bottom for the flash separator that weighs are weighed
The quality of condensed water is m1, the value added of drying tube quality is m2, to obtain the quality of the water in saturated natural gasFor
The sum of quality and the value added of drying tube quality of the bottom condensate water of weighing apparatus flash separator, i.e.,And then it obtains
The molal quantity n of waterw:
Wherein,It is the relative molecular mass of water；
7, in natural gas each component volume ViIt is calculated as follows and obtains:
Vi=Vyi(2)；
Wherein, V is volume of gas, unit cm3；
8, the molal volume vi of the volume of each component in natural gas is calculated using state equation:
α (T)=[1+m (1-Tr 0.5)]2(6)；
M=0.38+1.485 ω -0.16 ω2+0.017ω3(7)；
Wherein, P is system pressure, unit MPa；PcIt is the critical pressure of component, unit MPa；T is the temperature of system
Degree, is defaulted as room temperature, unit K；TcIt is the critical-temperature of component, unit K；TrFor the comparison temperature of component, i.e., current heating power
Learn the critical-temperature T of temperature and componentcRatio；R is universal gas constant, is 8.314MPacm3·mol-1·K-1；ω is
Deviation factors；A is intermolecular attraction coefficient；B is intermolecular repulsion coefficient；
9, the molal quantity n of the volume of each component in natural gas is calculatedi:
Vi=vini(8)；
10, the molal quantity n of natural gas is calculatedg:
ng=Σ ni(9)；
11, Gao Han CO2、H2Water content q in the natural gas of S are as follows:
Further, starting between step 1, with helium purge main vent.
Compared with prior art, advantages and advantages of the invention are:
1, the simulator structure is simple, easy to operate, is easy to make, low manufacture cost, and manufacture using Hastelloy
All appts make all pipelines using the steel of 316L, have outstanding anti-corrosion capability.
2, the analogy method is simple, and operating procedure is few, and operation difficulty is low, and repeatability is high, can be obtained by simply calculating
To the water content of natural gas, reference data dynamically can be provided for engineering.
3, analogy method measurement accuracy is high, can satisfy it is most of under the conditions of natural gas water content amount analogue measurement, energy
It is enough that CO is contained to height2、H2The exploration and development in the gas field S provides help.
Detailed description of the invention
Fig. 1 is high containing CO2、H2The structural schematic diagram of the analogue measurement device of water content in the natural gas of S.
Wherein, 1- gas cylinder；2- shut-off valve；3- force (forcing) pump；The first drying tube of 4-；5- preprocessor: the first constant temperature bath of 5.1-,
5.2- coil pipe；The first valve of 6-；7- constant temperature saturation balance pond: the second constant temperature bath of 7.1-, 7.2- enter pipe, 7.3- porous plate,
7.4- top cover, 7.5- discharge pipe；8- pressure regulation main valve；The first needle valve of 9-；The second needle valve of 10-；11- first pressure adjuster；
12- second pressure adjuster；The second valve of 13-；14- demister；15- third valve；16- equilibrium flash separator；17- second
Drying tube；18- gas flowmeter；19-CO2Absorption bottle；20-H2S absorption bottle；21- main vent；22- pressure regulation general pipeline；23- first
Pressure regulation branch pipe；24- the second pressure regulation branch pipe；25- absorbs tracheae.
Specific embodiment
CO is contained to height of the invention with reference to the accompanying drawing2、H2The analogue measurement device of water content carries out detailed in the natural gas of S
It describes in detail bright.
It is provided by the invention high containing CO2、H2Structural schematic diagram such as Fig. 1 of the analogue measurement device of water content in the natural gas of S
It is shown, including gas cylinder 1, main vent 21, force (forcing) pump 3, the first drying tube 4, preprocessor 5, constant temperature saturation balance pond 7, demisting
Device 14, equilibrium flash separator 16, the second drying tube 17, gas flowmeter 18, gas chromatograph, pressure regulating device, shut-off valve 2,
First valve 6, the second valve 13, third valve 15 and gas absorbing mechanism.21 entrance of main vent is connect with gas cylinder 1, cut-off
Valve 2, force (forcing) pump 3, the first drying tube 4, preprocessor 5, the first valve 6, constant temperature saturation balance pond 7, the second valve 13, demister
14, third valve 15, equilibrium flash separator 16, the second drying tube 17 and gas flowmeter 18 are along 21 entrance of main vent to out
The direction of mouth is successively installed on main vent 21.
Gas cylinder 1 is provided with high containing CO2、H2The natural gas of S.
3 model Victor GD-62B of increasing pump, is made of Hastelloy material.
First drying tube 4 and the second drying tube 17 are made by 316L steel, the first drying tube 4 and the second drying tube
Anhydrone is filled in 17.
Preprocessor 5 is made of 316L steel, and preprocessor includes in coil pipe and the first constant temperature bath, and the first constant temperature bath is in close
Shape is sealed, the first constant temperature bath is ethylene glycol-water-bath, and temperature is controlled in 273.15K ± 0.1K.Coil pipe is located in the first constant temperature bath,
The both ends of coil pipe are connect with main vent respectively.The effect of preprocessor is precooled to natural gas.
Constant temperature saturation balance pond includes the second constant temperature bath, into pipe, air collecting chamber and discharge pipe, is into pipe and discharge pipe
The double-deck superpower stainless steel tube of 347 types, the material of air collecting chamber are glass.Second water bath with thermostatic control is in seal shape, and the second constant temperature bath is second
Glycol-water-bath, temperature are controlled in 273.15K ± 0.1K.Air collecting chamber is made of hemispherical porous plate and circular top cover, more
Intensive and equally distributed gas collection hole on orifice plate, the aperture of gas collection hole are 14 microns, the circular open direction of porous plate, porous plate
Top opening by top seal, air collecting chamber is installed in the lower part of the second constant temperature bath.One end of air inlet pipe and main vent
Connection, the other end are located at the second water bath with thermostatic control bottom, and one end of discharge pipe passes through top cover center and is located in air collecting chamber, the other end and
Main vent connection.The natural gas of precooling is entered in the second constant temperature bath by air inlet pipe carries out aqueous saturation, after saturation
Natural gas enters air collecting chamber by gas collection hole, collects in air collecting chamber, then is entered in main vent by tap.
The model HGT21618-1998 of demister 14, volume 150cm3, and the bead of 5mm diameter is housed, with
Except the water droplet carried secretly in the air-flow after desaturation.
Equilibrium flash separator 16 model Ruska, maximum pressure 60MPa are made of Hastelloy material.
Gas flowmeter 17 is HS-6000 pipeline section type gas flowmeter, gas chromatograph model GC-8890A.Gas stream
Meter is connected with gas chromatograph, and equipped with computer system, by RS-232 interface by HP data acquisition unit
HP34970A is connected to personal computer to record the volume of dry gas.
Pressure regulating device include pressure regulation general pipeline 8, the first pressure regulation branch pipe 23, the second pressure regulation branch pipe 24, first pressure adjuster 11,
Second pressure adjuster 12, pressure regulation main valve 8, the first needle valve 9 and the second needle valve 10, one end of pressure regulation general pipeline 8 and ventilation are dry
Pipe 21 is located on the part between constant temperature saturation balance pond 7 and the second valve 13, and pressure regulation main valve 8 is installed on pressure regulation general pipeline 22.
The other end of pressure regulation general pipeline 22 is connect with one end of the first pressure regulation branch pipe 23 and the second pressure regulation branch pipe 24 respectively, the first pressure regulation branch pipe
23 other end is connect with first pressure adjuster 11, and the other end and second pressure adjuster 12 of the second pressure regulation branch pipe 24 connect
It connects, the first needle valve 9 is installed on the first pressure regulation branch pipe 23, and the second needle valve 10 is installed on the second pressure regulation branch pipe 24.
First pressure adjuster and second pressure adjuster are the Y-100BFZ stainless steel pressure regulator of resistance to vibration, scale model
Respectively 0~60MPa and 0~150MPa is enclosed, there is good Corrosion Protection, gas can be effectively resisted and quickly flow generation
Vibration.
Gas absorbing mechanism includes CO2Absorption bottle 19, H2S absorption bottle 20 and absorb tracheae 25, main vent 21 outlet with
CO2The connection of 19 entrance of absorption bottle, absorbs 25 entrance of tracheae and CO2The outlet of absorption bottle 19 connection absorbs the outlet of tracheae 25 and H2S inhales
Receive the connection of 20 entrance of bottle.
Main vent 21, pressure regulation general pipeline 8, the first pressure regulation branch pipe 23, the second pressure regulation branch pipe 24 and absorption tracheae 25 etc. are all
Pipeline using 316L steel make, have good anti-corrosion ability.
CO is contained to height of the invention below with reference to above-mentioned device2、H2The analog measurement method of water content in the natural gas of S
It is described in detail.
Embodiment 1
1, with standard helium purge pipeline 30 minutes；
2, preprocessor and constant temperature saturation balance pond are opened, keep the temperature in preprocessor and constant temperature saturation balance pond constant
0℃；
3, gas cylinder, shut-off valve, booster pump, the first valve, the second valve, third valve, pressure regulation main valve, the first needle-like are opened
Valve, the second needle valve, demister, equilibrium flash separator, gas flowmeter and gas chromatograph, increasing pump make the pressure of natural gas
Power is P, while being selected to open first pressure adjuster or second pressure adjuster according to the size of P；
4, natural gas passes sequentially through preprocessor, the first drying tube and constant temperature saturation balance pond, natural gas and passes through pretreatment
Device precools, dry (removal impurity) by the first drying tube, is saturated by constant temperature saturation balance pond, while passing through first
Pressure regulator or second pressure adjuster carry out the monitoring and control of pressure；
5, the natural gas after being saturated successively passes through demister, equilibrium flash separator and the second drying tube, first passes through demisting
The water droplet carried secretly in natural gas after device removal saturation, then carries out gas-liquid separation in equilibrium flash separator, condensed
Water droplet continues drying on the bottom of equilibrium flash separator, then through the second drying tube, and the natural gas after drying passes through gas
Quantifier, it is V that aerometer meter, which records its total volume,；
6, a part of natural gas enters gas chromatograph, by gas chromatograph measure each component in natural gas mole point
Number yi, another part natural gas passes sequentially through CO2Absorption bottle, H2S absorption bottle carries out absorption processing；
7, the quality of the bottom condensate water of weighing apparatus flash separator and the quality of drying tube, the bottom for the flash separator that weighs are weighed
The quality of condensed water is m1, the value added of drying tube quality is m2, to obtain the quality of the water in saturated natural gasFor
The sum of quality and the value added of drying tube quality of the bottom condensate water of weighing apparatus flash separator, i.e.,And then
The molal quantity n of water outletw:
Wherein,It is the relative molecular mass of water；
8, in natural gas each component volume ViIt is calculated as follows and obtains:
Vi=Vyi(2)；
Wherein, V is volume of gas, unit cm3；
9, the molal volume vi of the volume of each component in natural gas is calculated using state equation:
α (T)=[1+m (1-Tr 0.5)]2(6)；
M=0.38+1.485 ω -0.16 ω2+0.017ω3(7)；
Wherein, P is system pressure, unit MPa；PcIt is the critical pressure of component, unit MPa；T is the temperature of system
Degree, is generally defaulted as room temperature, unit K；TcIt is the critical-temperature of component, unit K；TrFor the comparison temperature of component, i.e., currently
The critical-temperature T of thermodynamic temperature and componentcRatio；R is universal gas constant, is 8.314MPacm3·mol-1·K-1；
ω is deviation factors；A is intermolecular attraction coefficient；B is intermolecular repulsion coefficient；
10, the molal quantity n of the volume of each component in natural gas is calculatedi:
Vi=vini(8)；
11, the molal quantity n of natural gas is calculatedg:
ng=∑ ni(9)；
12, Gao Han CO2、H2Water content in the natural gas of S are as follows:
Claims (9)
1. a kind of high containing CO2、H2The analogue measurement device of water content in the natural gas of S, it is characterised in that: dry including gas cylinder, ventilation
Pipe, force (forcing) pump, the first drying tube, constant temperature saturation balance pond, demister, equilibrium flash separator, the second drying tube, gas flow
Meter and gas chromatograph, main vent entrance are connect with gas cylinder, force (forcing) pump, the first drying tube, constant temperature saturation balance pond, demisting
Device, equilibrium flash separator, the second drying tube and gas flowmeter are successively installed on along the direction of main vent entrance to outlet
On main vent, gas chromatograph is connect with gas flowmeter.
2. according to claim 1 high containing CO2、H2The analogue measurement device of water content in the natural gas of S, it is characterised in that:
It further include pressure regulating device, pressure regulating device includes pressure regulation general pipeline, the first pressure regulation branch pipe, the second pressure regulation branch pipe, first pressure adjuster
With second pressure adjuster, the part of one end of pressure regulation general pipeline and main vent between constant temperature saturation balance pond and demister
Connection, the other end of pressure regulation general pipeline are connect with one end of the first pressure regulation branch pipe and the second pressure regulation branch pipe respectively, the first pressure regulation branch pipe
The other end connect with first pressure adjuster, the other end of the second pressure regulation branch pipe is connect with second pressure adjuster.
3. according to claim 1 high containing CO2、H2The analogue measurement device of water content in the natural gas of S, it is characterised in that:
It further include pressure regulation main valve, the first needle valve and the second needle valve, pressure regulation main valve is installed on pressure regulation general pipeline, the installation of the first needle valve
In on the first pressure regulation branch pipe, the second needle valve is installed on the second pressure regulation branch pipe.
4. according to claim 2 high containing CO2、H2The analogue measurement device of water content in the natural gas of S, it is characterised in that:
It further include preprocessor, preprocessor includes in coil pipe and the first constant temperature bath, and the first constant temperature bath is in seal shape, and coil pipe is located at first
In constant temperature bath, the both ends of coil pipe are connect with main vent respectively.
5. according to claim 4 high containing CO2、H2The analogue measurement device of water content in the natural gas of S, it is characterised in that:
It further include shut-off valve, the first valve, the second valve and third valve, shut-off valve is installed on main vent and is located at gas cylinder and booster pump
Between part on, the first valve is installed on the part that main vent is located between preprocessor and constant temperature saturation balance pond,
Second valve is installed on main vent on the part between pressure regulation general pipeline and demister, and third valve is installed on main vent
On part between demister and balance flash separator.
6. according to claim 1 high containing CO2、H2The analogue measurement device of water content in the natural gas of S, it is characterised in that:
The constant temperature saturation balance pond includes the second constant temperature bath, into pipe, air collecting chamber and discharge pipe, and the second water bath with thermostatic control is in sealing
Shape, air collecting chamber are made of hemispherical porous plate and circular top cover, and porous plate is equipped with intensive and equally distributed gas collection hole,
The circular open direction of porous plate, by top seal, air collecting chamber is installed under the second constant temperature bath the top opening of porous plate
In portion, one end of air inlet pipe is connected to main vent, and the other end is located at the second water bath with thermostatic control bottom, and one end of discharge pipe passes through top
Lid center is located in air collecting chamber, and the other end is connected to main vent.
7. according to claim 2 high containing CO2、H2The analogue measurement device of water content in the natural gas of S, it is characterised in that:
It further include gas absorbing mechanism, gas absorbing mechanism includes CO2Absorption bottle, H2S absorption bottle and absorption tracheae, main vent outlet
With CO2The connection of absorption bottle entrance, absorbs air pipe inlet and CO2Absorption bottle outlet connection absorbs tracheae outlet and H2S absorption bottle enters
Mouth connection.
8. a kind of high containing CO2、H2The analog measurement method of water content in the natural gas of S, it is characterised in that include the following steps:
8.1, constant temperature saturation balance pond is opened, keeps the temperature in constant temperature saturation balance pond constant at -5-5 DEG C；
8.2, contain CO equipped with high in gas cylinder2、H2The natural gas of S, open gas cylinder, booster pump, demister, equilibrium flash separator and
Gas chromatograph, increasing pump make the pressure P of natural gas；
8.3, natural gas successively passes through the first drying tube of preprocessor and constant temperature saturation balance pond, is done by the first drying tube
It is dry, aqueous saturation is carried out by constant temperature saturation balance pond；
8.4, the natural gas after being saturated successively passes through demister, equilibrium flash separator and the second drying tube, first passes through demister
The water droplet carried secretly in natural gas after removal saturation, then carries out gas-liquid separation, condensed water in equilibrium flash separator
Drop continues drying on the bottom of equilibrium flash separator, then through the second drying tube, and the natural gas after drying passes through aerometer
Meter, it is V that aerometer meter, which records its total volume,；
8.5, a part of natural gas enters gas chromatograph, and the molar fraction of each component in natural gas is measured by gas chromatograph
yi；
8.6, the quality of the bottom condensate water of weighing apparatus flash separator and the quality of drying tube are weighed, the bottom for the flash separator that weighs is cold
The quality of condensate is m1, the value added of drying tube quality is m2, to obtain the quality of the water in saturated natural gasFor weighing apparatus
The sum of quality and the value added of drying tube quality of the bottom condensate water of flash separator, i.e.,And then it must be discharged
Molal quantity nw:
Wherein,It is the relative molecular mass of water；
8.7, in natural gas each component volume ViIt is calculated as follows and obtains:
Vi=Vyi(2)；
Wherein, V is volume of gas, unit cm3；
8.8, the molal volume vi of the volume of each component in natural gas is calculated using state equation:
α (T)=[1+m (1-Tr 0.5)]2(6)；
M=0.38+1.485 ω -0.16 ω2+0.017ω3(7)；
Wherein, P is system pressure, unit MPa；PcIt is the critical pressure of component, unit MPa；T is the temperature of system, unit
For K；TcIt is the critical-temperature of component, unit K；TrFor the comparison temperature of component, i.e., current thermodynamic temperature and component it is critical
Temperature TcRatio；R is universal gas constant, is 8.314MPacm3·mol-1·K-1；ω is deviation factors；A is intermolecular
Gravitational coefficients；B is intermolecular repulsion coefficient；
8.9, the molal quantity n of the volume of each component in natural gas is calculatedi:
Vi=vini(8)；
8.10, the molal quantity n of natural gas is calculatedg:
ng=∑ ni(9)；
8.11, Gao Han CO2、H2Water content q in the natural gas of S are as follows:
。
9. according to claim 7 high containing CO2、H2The analog measurement method of water content in the natural gas of S, it is characterised in that:
Starting between step 8.1, with helium purge main vent.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110354651A (en) * | 2019-08-19 | 2019-10-22 | 杨威 | A kind of gas dry experimental provision and experimental method |
| CN113075110A (en) * | 2021-04-06 | 2021-07-06 | 西南石油大学 | Multifunctional accurate metering device for rock core displacement experiment |
| CN113324867A (en) * | 2021-06-04 | 2021-08-31 | 邓燕龙 | Natural gas moisture detection device |
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