CN110467950A - A kind of Gas Dehydration System and its dry gas water dew point test method - Google Patents
A kind of Gas Dehydration System and its dry gas water dew point test method Download PDFInfo
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- CN110467950A CN110467950A CN201910765423.5A CN201910765423A CN110467950A CN 110467950 A CN110467950 A CN 110467950A CN 201910765423 A CN201910765423 A CN 201910765423A CN 110467950 A CN110467950 A CN 110467950A
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- triethylene glycol
- dew point
- storage element
- gas
- glycol
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 230000018044 dehydration Effects 0.000 title claims abstract description 36
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 36
- 238000010998 test method Methods 0.000 title claims abstract description 14
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 claims abstract description 183
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 76
- 230000001172 regenerating effect Effects 0.000 claims abstract description 41
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 109
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 52
- 238000005070 sampling Methods 0.000 claims description 40
- 239000003345 natural gas Substances 0.000 claims description 26
- 238000001914 filtration Methods 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000012937 correction Methods 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 4
- 239000013535 sea water Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 235000009508 confectionery Nutrition 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 208000037805 labour Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/106—Removal of contaminants of water
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
- G01N25/66—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention relates to a kind of Gas Dehydration System and its dry gas water dew point test methods, comprising: moisture inlet, primary filter and triethylene glycol contact tower, poor glycol/residue gas heat exchanger, triethylene glycol regenerating unit, triethylene glycol sampler and temperature-detecting device；The air inlet of triethylene glycol contact tower connects primary filter, and the gas outlet of triethylene glycol contact tower connects the first input end of poor glycol/residue gas heat exchanger, and the first output end of poor glycol/residue gas heat exchanger exports dry gas；The liquid outlet C2 of triethylene glycol contact tower is sequentially connected the second input terminal of triethylene glycol regenerating unit Yu poor glycol/residue gas heat exchanger, the inlet C3 of the second output terminal connection triethylene glycol contact tower of poor glycol/residue gas heat exchanger；The air inlet of temperature-detecting device connection triethylene glycol contact tower；Triethylene glycol sampler is arranged close to the second input terminal of poor glycol/residue gas heat exchanger and connects triethylene glycol regenerating unit.It is at low cost and applied widely to implement the present invention.
Description
Technical field
The present invention relates to the natural gas dehydration technique fields in the treatment facility of offshore natural gas field, and especially triethylene glycol is de-
Water technical field, more specifically to a kind of Gas Dehydration System and its dry gas water dew point test method.
Background technique
Gas dehydration is step required in gas exploitation course, and treatment process is to aqueous more wet natural
Gas is dehydrated to obtain the dry gas met the requirements.Wherein the parameter index of dry gas can be indicated by dry gas water dew point, i.e.,
Dry gas water content is characterized by dry gas water dew point how much, specifically refer to dry gas and drip corresponding temperature by condensation first
Degree.Dry gas water dew point is technical indicator the most key in the natural gas processing of gas field.If the excessively high expression dry gas of dry gas water dew point
Middle water content is high, accelerates downstream line and equipment corrosion rate, or even gas hydrates are formed in multi-purpose station pipeline, reduces pipe
Road transfer efficiency seriously then blocks pipeline formation and builds the pressure, causes the serious consequence of pipeline breaking.If dry gas water dew point is too low,
Then show that natural gas processing process operation economy is insufficient, cost increase.
Dry gas water dew point needs real-time perfoming to monitor as key parameter, gas field, the dew point hygrometer that current gas field generallys use into
The monitoring of row water dew point.Dew point hygrometer mostly uses integrated equipment to realize measurement by complicated technologies such as optical energy detections.Dew point hygrometer
Use condition is harsh, and have to pass through can after the modes such as decompression and heating reach dew point hygrometer testing conditions for dry gas after system processing
Detection, there are any small deviations all will lead to measurement result inaccuracy for the adjusting of dry gas pressure.Secondly dew point hygrometer use condition by
Environment influences greatly, and deviation often occurs in dew point hygrometer detection under the adverse circumstances such as rainy day.Again due to dew point hygrometer equipment is accurate, phase
It is harsh to close component use condition, water dew point monitoring can not be carried out in time by equipment fault often occur in operation.In addition, dew point hygrometer is adopted
Purchase installation and maintenance cost are high, and maintenance cycle is longer, are unable to satisfy the demand of gas field long-time service.Natural gas field is urgent
Need a kind of simple and effective and steady in a long-term dry gas water dew point measuring system and method.
Summary of the invention
The technical problem to be solved in the present invention is that providing a kind of day for the above-mentioned prior art defect of the prior art
Right qi exhaustion water system and its dry gas water dew point test method.
The technical solution adopted by the present invention to solve the technical problems is: a kind of Gas Dehydration System is constructed,
It include: sweet for inputting moisture inlet to be drained off, the primary filter of the connection moisture inlet and three
Alcohol contact tower, poor glycol/residue gas heat exchanger, triethylene glycol regenerating unit, triethylene glycol sampler and temperature-detecting device；
The air inlet of the triethylene glycol contact tower connects the primary filter, the gas outlet of the triethylene glycol contact tower
The first input end of poor glycol/residue gas heat exchanger is connected, and exports and does through the first output end of the poor glycol/residue gas heat exchanger
Gas；
The liquid outlet C2 connection triethylene glycol regenerating unit of the triethylene glycol contact tower, and successively through the triethylene glycol again
Generating apparatus is connected with the second input terminal of the poor glycol/residue gas heat exchanger, and the second of the poor glycol/residue gas heat exchanger is defeated
Outlet connects the inlet C3 of the triethylene glycol contact tower；
The temperature-detecting device connects the air inlet of the triethylene glycol contact tower, for detecting the moisture to be drained off
Temperature；
The triethylene glycol sampler is arranged close to the second input terminal of the poor glycol/residue gas heat exchanger and connects described
Triethylene glycol regenerating unit is sampled for the poor triethylene glycol of the output end of the triethylene glycol regenerating unit to obtain its triethylene glycol
Concentration.
Preferably, the triethylene glycol sampler include: connect the triethylene glycol regenerating unit the first sampling slip and
The sample storage element of first sampling slip is connected, first sampling slip is equipped with the first isolating valve, the sample
Storage element include can external liquid storage container sample storage element first end and sample storage element for pressure releasing
Two ends, the sample storage element first end are equipped with the second isolating valve, and the sample storage element second end is isolated equipped with third
Valve.
Preferably, the sample storage element is 1/2 " gauge pipe, and the instrument length of tube is greater than or equal to 200mm.
Preferably, the sample storage element is obliquely installed so that the sample storage element first end horizontal position is lower than
The sample storage element second end horizontal position.
Preferably, the sample storage element tilt angle is not less than 10 degree.
Preferably, the sample storage element second end is equipped with elbow, and the elbow is upward；And/or the sample
Storage element first end is equipped with hose coupling.
Preferably, the sample storage element first end is additionally provided with the plug for connecting the hose coupling.
Preferably, the triethylene glycol sampler further includes the second sampling slip for connecting the triethylene glycol regenerating unit,
Second sampling slip connects the sample storage element at the sample storage element second end, and described second takes
Sample branch road is equipped with the 4th isolating valve.
Preferably, first isolating valve, second isolating valve, the third isolating valve and/or the 4th isolation
Valve is double isolation needle-valves.
Preferably, the primary filter includes natural Gas Cooler and ingress filtering separator；
First input port of the natural Gas Cooler connects the moisture inlet, and the first of the natural Gas Cooler is defeated
Outlet connects the input terminal of the ingress filtering separator, and the output end of the ingress filtering separator connects the triethylene glycol and connects
Touch the air inlet of tower；
The second output terminal of second input terminal of the natural Gas Cooler and the natural Gas Cooler is led with seawater
It is logical.
Preferably, the triethylene glycol regenerating unit includes triethylene glycol circulating pump, the outlet connection of the triethylene glycol circulating pump
Second input terminal of the poor glycol/residue gas heat exchanger, the triethylene glycol sampler go out close to the triethylene glycol circulating pump
Mouth setting.
Preferably, triethylene glycol contact tower (40) pressure is between 3~20MPa, the triethylene glycol contact tower (40) into
The temperature of port is between 27~43 DEG C.
In addition, the present invention constructs a kind of Gas Dehydration System dry gas water dew point test method, it is applied to any of the above one
The Gas Dehydration System, comprising:
S1, the real-time intake air temperature for obtaining triethylene glycol contact tower；
S2, the poor triethylene glycol in triethylene glycol regenerating unit is sampled by triethylene glycol sampler, and obtains sampling
Real-time triethylene glycol concentration in sample；
S3, default intake air temperature, default triethylene glycol concentration and the preset relation for balancing water dew point are obtained；And according to the reality
When intake air temperature, the real-time triethylene glycol concentration and the preset relation obtain corresponding balance water dew point to correspond to dehydration and be
The dry gas water dew point of system.
Preferably, in the step S3, described to obtain default intake air temperature, default triethylene glycol concentration and balance water dew point
Preset relation；Further include:
Deviation is obtained, to be corrected to the preset relation, to obtain the preset relation after correction；Or
In the step S3, according to the real-time intake air temperature, the real-time triethylene glycol concentration and the default pass
System obtains corresponding balance water dew point to correspond to the dry gas water dew point of dewatering system, comprising:
The deviation is obtained, according to the real-time intake air temperature, the real-time triethylene glycol concentration and the default pass
System obtains corresponding balance water dew point, and is modified according to the deviation to obtain corresponding revised balance water dew point
Correspond to the dry gas water dew point of dewatering system.
Preferably, the deviation value is generally 5~11 DEG C, and/or
It is described to be corrected to the preset relation, including preset relation forward direction compensated into the deviation；
Or
It is described to be modified according to the deviation to obtain corresponding revised balance water dew point, including, it will be described
It balances water dew point and carries out the positive revised balance water dew point for compensating the deviation to obtain.
Implement a kind of Gas Dehydration System of the invention and its dry gas water dew point test method, has below beneficial to effect
Fruit: having saved the high expense of dew point hygrometer buying, installation and maintenance, has prevented dew point hygrometer measuring condition harshness and has been unable to satisfy situation
The lower a wide range of deviation of bring, it is applied widely.Energy save the cost, economical and efficient simultaneously, and execute-in-place can be saved
A large amount of labours, effectively promotion operating efficiency.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is a kind of structural schematic diagram of Gas Dehydration System of the present invention；
Fig. 2 is a kind of partial structural diagram of one embodiment of Gas Dehydration System of the present invention；
Fig. 3 is the program flow diagram of an embodiment of Gas Dehydration System dry gas water dew point test method of the present invention；
Fig. 4 is intake air temperature, triethylene glycol concentration in a kind of Gas Dehydration System dry gas water dew point test method of the present invention
With the preset relation schematic diagram of balance water dew point.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
A specific embodiment of the invention.
As shown in Figure 1, in one embodiment of a kind of Gas Dehydration System of the invention, comprising: to be drained off for inputting
Moisture inlet 10, connect moisture inlet 10 primary filter 20 and triethylene glycol contact tower 40, poor glycol/dry gas change
Hot device 50, triethylene glycol regenerating unit 70, triethylene glycol sampler 60 and temperature-detecting device 30；The air inlet of triethylene glycol contact tower 40
Mouth C1 connection primary filter 20, the gas outlet C4 of triethylene glycol contact tower 40 connects the first of poor glycol/residue gas heat exchanger 50
Input terminal B1, and the first output end B3 through poor glycol/residue gas heat exchanger 50 exports dry gas；The liquid outlet of triethylene glycol contact tower 40
C2 connection triethylene glycol regenerating unit 70, and it is successively second through triethylene glycol regenerating unit 70 and poor glycol/residue gas heat exchanger 50 defeated
Enter B4 is held to be connected, the inlet C3 of the second output terminal B2 connection triethylene glycol contact tower 40 of poor glycol/residue gas heat exchanger 50；Temperature
It spends detection device 30 and connects the air inlet of triethylene glycol contact tower 40, the temperature for detecting moisture to be drained off；Triethylene glycol sampling dress
It sets 60 and is arranged and connects triethylene glycol regenerating unit 70 close to the second input terminal B4 of poor glycol/residue gas heat exchanger 50, for three sweet
The poor triethylene glycol of the output end of alcohol regenerating unit 70 is sampled to obtain thirdly glycol concentration.Specifically, aqueous more wet
Natural gas, that is, moisture to be drained off carries out preliminary treatment into primary filter 20 through moisture inlet 10, then filters out natural gas
In free water and solid impurity, only exist saturated water in natural gas at this time, so enter triethylene glycol contact tower 40 with from upper and
The lower poor triethylene glycol (aqueous seldom triethylene glycol) contacted into triethylene glycol carries out reverse contact deep dehydration, after dehydration is qualified
Natural gas carries out outer defeated.Poor triethylene glycol becomes rich triethylene glycol after absorbing moisture, is regenerated into triethylene glycol regenerating unit 70.Three
Glycol reclamation device 70 generates poor triethylene glycol after being dehydrated the rich triethylene glycol of entrance, then changes through poor glycol/residue gas heat exchanger 50
Enter triethylene glycol contact tower 40 after heat, the purpose that poor glycol/residue gas heat exchanger 50 exchanges heat here make from triethylene glycol contact tower 40 into
The temperature for the poor triethylene glycol that liquid mouth C3 enters reduces.In order to detect whether the dry gas water dew point obtained after dehydration meets the requirements,
Temperature-detecting device 30 is set by the air inlet in triethylene glycol contact tower 40, detection enters the moisture of triethylene glycol contact tower 40
Moisture temperature, and by triethylene glycol regenerating unit 70 export the exit of poor triethylene glycol i.e. triethylene glycol regenerating unit 70 with it is poor sweet
Triethylene glycol sampler 60 is set between second input terminal B4 of alcohol/residue gas heat exchanger 50, triethylene glycol regenerating unit 70 is exported
The triethylene glycol concentration of poor triethylene glycol be sampled chemical examination, then by triethylene glycol contact tower 40, preset intake air temperature, three
The preset relation of glycol concentration and balance water dew point, further according to the actual moisture temperature got, poor triethylene glycol concentration is obtained
Corresponding balance water dew point is taken, which is the dry gas water dew point of the output dry gas of the dewatering system.
Further, as shown in Figure 2, in an example, triethylene glycol sampler 60 includes: connection triethylene glycol regenerating unit
The sample storage element 63 of 70 the first sampling slip 61 of the first sampling slip 61 and connection, the first sampling slip 61 are equipped with the
One isolating valve 611, sample storage element 63 include can external liquid storage container 63 first end of sample storage element and be used for pressure
63 second end of sample storage element released, 63 first end of sample storage element are equipped with the second isolating valve 633, sample storage element
63 second ends are equipped with third isolating valve 634.Specifically, by the first sampling slip 61 of connection triethylene glycol regenerating unit 70, from
The poor triethylene glycol sample obtained after treatment is obtained in triethylene glycol regenerating unit 70, the detailed process of the sampling is first to open
First isolating valve 611 makes poor triethylene glycol sample enter sample storage element 63 via the first sampling slip 61, stores in sample single
After member 63 gets a certain amount of sample, the first isolating valve 611 is turned off, it is certain due to existing in triethylene glycol regenerating unit 70 at this time
Pressure, there is also bigger pressure for the sample of acquisition, can open at this time the third of 63 second end of sample storage element every
From valve 634, pressure release is exhausted by 63 second end of sample storage element, in pressure reduction to when meeting the requirements, then can be beaten
The second isolating valve 633 for opening 63 first end of sample storage element is connected 63 first end of sample storage element, can pass through at this time
Transfer or test of the external liquid storage container to the sampling sample, to obtain the triethylene glycol concentration of sampling sample.It is appreciated that In
After the completion of sample is taken, need the second isolating valve 633 and third isolating valve 634 being disposed as off state.
Optionally, sample storage element 63 is 1/2 " gauge pipe, and instrument length of tube is greater than or equal to 200mm.Specifically, being
Guarantee the volume capacity that sample is taken, it can be using the gauge pipe passed through to the setting of sample storage element 63.
Optionally, sample storage element 63 is obliquely installed so that sample storage element first end horizontal position is stored up lower than sample
Memory cell second end horizontal position.Specifically, during in order to guarantee that sample is taken, sampling sample can be relatively easy to by
Sample storage element first end is input to external liquid storage container, can be obliquely installed with sample storage element 63, so that sample
Storage element first end horizontal position is lower than sample storage element second end horizontal position, so that sampling sample can rely on gravity
Effect flow into liquid storage container from sample storage element 63.
Further, 63 tilt angle of sample storage element is not less than 10 degree.Specifically, in order to guarantee gravitational effects, it is right
The inclined tilt angle of sample storage element 63 is set as not less than 10 degree.
Further, sample storage element second end is bend design, and elbow 632 is upward；And/or sample storage
Unit first end is equipped with hose coupling.Specifically, preventing its internal sampling when in order to make to carry out pressure release to sample storage element 63
Sample is excessive, sample storage element second end can be designed as to elbow 632, elbow 632 is upward.In addition, in order to which aspect is fast
Sampling sample in sample storage element 63 is transferred to external liquid storage container, the setting of sample storage element first end by prompt realization
For hose coupling, in the transfer process to sampling sample, it is only necessary to it is required that liquid storage container connects the hose coupling.
Further, sample storage element first end is additionally provided with the plug 631 of connection hose coupling.Specifically, in order to keep away
Exempting from maloperation causes sampling sample excessive, and the plug 631 for connecting the hose coupling is additionally provided in sample storage element first end,
When needing external liquid storage container, the movement for removing the plug 631 is carried out.
Optionally, triethylene glycol sampler 60 further includes the second sampling slip 62 for connecting triethylene glycol regenerating unit 70, the
Two sampling slips 62 connect sample storage element 63 at sample storage element second end, and the second sampling slip 62 is equipped with
4th isolating valve 621.Specifically, the sampling effect in order to guarantee sampling sample, is also provided with connection triethylene glycol regenerating unit
70 the second sampling slip 62, the second sampling slip 62 are arranged at 63 second end of sample storage element, its working principle is that,
In sampling process, the first isolating valve 611 and the 4th isolating valve 621 are first opened, makes the first sampling slip 61, sample storage element
63 and second sampling slip 62 with triethylene glycol regenerating unit 70 form closed circuit, after certain time, shutdown the 4th every
From valve 621, then sample process as described above is carried out, can effectively avoid in this way can in raw sample storage element 63
The sample of leaving in last sampling process can be left, and is contaminated this sub-sampling sample, influences its test accuracy.
Optionally, the first isolating valve 611, the second isolating valve 633, third isolating valve 634 and/or the 4th isolating valve 621 are
Double isolation needle-valves.Specifically, the first isolating valve 611, the second isolating valve 633, third isolation in the triethylene glycol sampler 60
One or more in valve 634 and the 4th isolating valve 621 can be using double isolation needle-valves, to improve its isolation effect.
Optionally, primary filter 20 includes natural Gas Cooler 21 and ingress filtering separator 22；Natural air cooling
First input port A1 connection moisture inlet 10 of device 21, the first output terminals A 3 connection ingress filtering separation of natural Gas Cooler 21
The input terminal of device 22, the air inlet C1 of the output end connection triethylene glycol contact tower 40 of ingress filtering separator 22；Natural air cooling
Second input terminal A2 of device 21 and the second output terminal A4 of natural Gas Cooler 21 are connected with seawater.Specifically, wet gas
Enter primary filter 20 through moisture inlet 10, the cooling heat transferring of natural Gas Cooler 21 progress and seawater can be first passed through,
It reduces its temperature and reduces the saturated aqueous of natural gas, then separate free water and solid therein by ingress filtering separator 22
Granule foreign, the air inlet through triethylene glycol contact tower 40 enter triethylene glycol contact tower 40.
Optionally, triethylene glycol regenerating unit 70 includes triethylene glycol circulating pump 77, and the outlet connection of triethylene glycol circulating pump 77 is poor
Second input terminal of glycol/residue gas heat exchanger 50, triethylene glycol sampler 60 are arranged close to the outlet of triethylene glycol circulating pump 77.Tool
Body, triethylene glycol regenerating unit 70 includes flash tank 75, triethylene glycol filter 741,742, reboiler 71, rectifying column 711, reflux
Condensation column 712, stripping columns 72, lean/rich glycol heat exchanger 73, surge tank 76, triethylene glycol circulating pump 77 etc..Specific regeneration technology
For, rich glycol enters the abjection light hydrocarbon component of flash tank 75 after entering the heating of reflux condensation mode column after the water suction of triethylene glycol contact tower 40,
Filter out the solid impurity and heavy hydrocarbon in triethylene glycol. solution respectively subsequently into particulate filter 742 and active carbon filter 741
Deng after the heating of lean/rich glycol heat exchanger 73, carrying out heat temperature raising into reboiler 71, triethylene glycol and water boiling point are not
Together, moisture evaporates after rich triethylene glycol heats in triethylene glycol reboiler 71, and rich triethylene glycol becomes poor triethylene glycol, and poor triethylene glycol continues
Into stripping columns 72 to by be further dehydrated with dry gas mass transfer reach purity requirement after enter triethylene glycol surge tank 76 store.So
The poor triethylene glycol in triethylene glycol surge tank 76 is conveyed by triethylene glycol circulating pump 77 afterwards, through poor glycol/residue gas heat exchanger
50 the second input port B4 and the second delivery outlet B2 and the inlet C3 of triethylene glycol contact tower 40 enter triethylene glycol contact tower 40
Carry out moisture dehydration.
In addition, as shown in figure 3, a kind of Gas Dehydration System dry gas water dew point test method of the invention, is applied to above
Arbitrary Gas Dehydration System, comprising:
S1, the real-time intake air temperature for obtaining triethylene glycol contact tower；
S2, the poor triethylene glycol in triethylene glycol regenerating unit is sampled by triethylene glycol sampler, and obtains sampling
Real-time triethylene glycol concentration in sample；
S3, default intake air temperature, default triethylene glycol concentration and the preset relation for balancing water dew point are obtained；And according in real time into
Temperature degree, real-time triethylene glycol concentration and preset relation obtain corresponding balance water dew point to correspond to the dry gas water dew of dewatering system
Point.
Specifically, as described above, in order to detect whether the dry gas water dew point obtained after dehydration meets the requirements, leading to
Temperature-detecting device is arranged in the air inlet crossed in triethylene glycol contact tower, and detection enters the moisture temperature of triethylene glycol contact tower, and leads to
The exit of the poor triethylene glycol of triethylene glycol regenerating unit output is crossed i.e. in triethylene glycol regenerating unit and poor glycol/residue gas heat exchanger
Triethylene glycol sampler is set between the second input terminal, the triethylene glycol concentration of the poor triethylene glycol of triethylene glycol regenerating unit output is taken
Then sample chemical examination passes through as shown in Figure 4, in triethylene glycol contact tower, preset intake air temperature, triethylene glycol concentration and equilibrium water are revealed
The preset relation of point, further according to the actual moisture temperature got, poor triethylene glycol concentration obtains corresponding balance water dew point,
The balance water dew point is the dry gas water dew point of the output dry gas of the dewatering system.The step sequence in test method does not have herein
Have that strict demand, especially its real-time intake air temperature, real-time triethylene glycol concentration obtain and the acquisition of preset relation sequence can be with
Any setting.
Optionally, in step s3, default intake air temperature, default triethylene glycol concentration and the default pass for balancing water dew point are obtained
System；Further include:
Deviation is obtained, to be corrected to preset relation, to obtain the preset relation after correction；Or
In step s3, to obtain corresponding balance according to real-time intake air temperature, real-time triethylene glycol concentration and preset relation
Water dew point is to correspond to the dry gas water dew point of dewatering system, comprising:
Deviation is obtained, to obtain corresponding balance according to real-time intake air temperature, real-time triethylene glycol concentration and preset relation
Water dew point, and be modified according to deviation to obtain the dry gas that corresponding revised balance water dew point corresponds to dewatering system
Water dew point.
Specifically, there may be part deviations for different technique, which is arranged according to technique, is being handled
In the process, be corrected based on the deviation, correction may include being corrected to preset relation, by the preset relation of standard into
After row deviation supplement, the preset relation after correcting is obtained, by the preset relation after correction, according to the real-time air inlet temperature of acquisition
Preset relation after degree, real-time triethylene glycol concentration and correction obtains corresponding balance water dew point to correspond to the dry gas of dewatering system
Water dew point.Corresponding balance water dew point can also be obtained according to the preset relation of standard, then the balance water dew point is mended
It repays correction and obtains the dry gas water dew point that corresponding revised balance water dew point corresponds to dewatering system.
Optionally, deviation value is 5~11 DEG C, such as deviation takes 10 DEG C, will be pre- to be corrected to preset relation
If relationship forward direction compensates 10 DEG C；Or be modified according to deviation to obtain corresponding revised balance water dew point, including, it will
It balances water dew point and carries out revised balance water dew point of 10 DEG C of the positive compensation to obtain.Specifically, being directed to part Oilfield Natural Gas Plant
Acquisition system, by 10 DEG C of value, the preset relation of standard is carried out positive translation, obtains school deviation by forward direction supplement
Preset relation after just, can also be to the directly positive compensation of the balance water dew point that measured preset relation obtains, to obtain
Final balance water dew point.
It should be understood that above embodiments only express the preferred embodiment of the present invention, description is more specific and detailed
Carefully, but it cannot be understood as limitations on the scope of the patent of the present invention；It should be pointed out that for the common skill of this field
For art personnel, without departing from the inventive concept of the premise, above-mentioned technical characterstic can be freely combined, can also be done
Several modifications and improvements out, these are all within the scope of protection of the present invention；Therefore, all to be done with scope of the invention as claimed
Equivalents and modification, should belong to the covering scope of the claims in the present invention.
Claims (15)
1. a kind of Gas Dehydration System characterized by comprising for inputting moisture inlet to be drained off (10), connection institute
State moisture inlet (10) primary filter (20) and triethylene glycol contact tower (40), poor glycol/residue gas heat exchanger (50),
Triethylene glycol regenerating unit (70), triethylene glycol sampler (60) and temperature-detecting device (30)；
The air inlet of the triethylene glycol contact tower (40) connects the primary filter (20), the triethylene glycol contact tower (40)
Gas outlet connect the first input end of poor glycol/residue gas heat exchanger (50), and through the poor glycol/residue gas heat exchanger (50)
First output end exports dry gas；
The liquid outlet of the triethylene glycol contact tower (40) connects the triethylene glycol regenerating unit (70), and regenerates through the triethylene glycol
Device (70) is connected with the second input terminal of the poor glycol/residue gas heat exchanger (50), the poor glycol/residue gas heat exchanger
(50) second output terminal connects the inlet of the triethylene glycol contact tower (40)；
The temperature-detecting device (30) connects the air inlet, described to be drained off for detecting of the triethylene glycol contact tower (40)
The temperature of moisture；
The triethylene glycol sampler (60) is arranged and connects close to the second input terminal of the poor glycol/residue gas heat exchanger (50)
The triethylene glycol regenerating unit (70) is used to sample the poor triethylene glycol of the output end of the triethylene glycol regenerating unit (70)
To obtain thirdly glycol concentration.
2. Gas Dehydration System according to claim 1, which is characterized in that triethylene glycol sampler (60) packet
It includes: connecting the first sampling slip (61) of the triethylene glycol regenerating unit (70) and the sample of connection first sampling slip (61)
Product storage element (63), first sampling slip (61) are equipped with the first isolating valve (611), the sample storage element (63)
Including can external liquid storage container sample storage element first end and for the sample storage element second end of pressure releasing, it is described
Sample storage element first end is equipped with the second isolating valve (633), and the sample storage element second end is equipped with third isolating valve
(634)。
3. Gas Dehydration System according to claim 2, which is characterized in that the sample storage element (63) is 1/2 "
Gauge pipe, the instrument length of tube are greater than or equal to 200mm.
4. Gas Dehydration System according to claim 3, which is characterized in that sample storage element (63) inclination is set
It sets so that the sample storage element first end horizontal position is lower than the sample storage element second end horizontal position.
5. Gas Dehydration System according to claim 4, which is characterized in that sample storage element (63) inclination angle
Degree is not less than 10 degree.
6. Gas Dehydration System according to claim 3, which is characterized in that the sample storage element second end is equipped with
Elbow (632), the elbow (632) is upward；And/or the sample storage element first end is equipped with hose coupling.
7. Gas Dehydration System according to claim 6, which is characterized in that the sample storage element first end is also set
There is the plug (631) for connecting the hose coupling.
8. Gas Dehydration System according to claim 2, which is characterized in that the triethylene glycol sampler (60) is also wrapped
The second sampling slip (62) for connecting the triethylene glycol regenerating unit (70) is included, second sampling slip (62) is close to the sample
Connect the sample storage element (63) at product storage element second end, and second sampling slip (62) be equipped with the 4th every
From valve (621).
9. Gas Dehydration System according to claim 8, which is characterized in that first isolating valve (611), described
Two isolating valves (633), the third isolating valve (634) and/or the 4th isolating valve (621) are double isolation needle-valves.
10. Gas Dehydration System according to claim 1, which is characterized in that the primary filter cooling device (20)
Including natural Gas Cooler (21) and ingress filtering separator (22)；
First input port of the natural Gas Cooler (21) connects the moisture inlet (10), the natural Gas Cooler (21)
The first output end connect the input terminal of the ingress filtering separator (22), the output end of the ingress filtering separator (22)
Connect the air inlet of the triethylene glycol contact tower (40)；
The second output terminal of second input terminal of the natural Gas Cooler (21) and the natural Gas Cooler (21) with sea
Water conducting.
11. Gas Dehydration System according to claim 1, which is characterized in that triethylene glycol regenerating unit (70) packet
It includes triethylene glycol circulating pump (77), the outlet of the triethylene glycol circulating pump (77) connects the poor glycol/residue gas heat exchanger (50)
Second input terminal, the triethylene glycol sampler (60) are arranged close to the outlet of the triethylene glycol circulating pump (77).
12. Gas Dehydration System according to claim 1, which is characterized in that triethylene glycol contact tower (40) pressure
Between 3~20MPa, the temperature of triethylene glycol contact tower (40) air inlet is between 27~43 DEG C.
13. a kind of Gas Dehydration System dry gas water dew point test method, applied to natural qi exhaustion described in claim 1-12
Water system characterized by comprising
S1, the real-time intake air temperature for obtaining triethylene glycol contact tower；
S2, the poor triethylene glycol in triethylene glycol regenerating unit is sampled by triethylene glycol sampler, and obtains sample
In real-time triethylene glycol concentration；
S3, default intake air temperature, default triethylene glycol concentration and the preset relation for balancing water dew point are obtained；And according to it is described in real time into
Temperature degree, the real-time triethylene glycol concentration and the preset relation obtain corresponding balance water dew point to correspond to dewatering system
Dry gas water dew point.
14. dry gas water dew point test method according to claim 13, which is characterized in that in the step S3, described
Obtain default intake air temperature, default triethylene glycol concentration and the preset relation for balancing water dew point；Further include:
Deviation is obtained, to be corrected to the preset relation, to obtain the preset relation after correction；Or
In the step S3, to be obtained according to the real-time intake air temperature, the real-time triethylene glycol concentration and the preset relation
Corresponding balance water dew point is taken to correspond to the dry gas water dew point of dewatering system, comprising:
The deviation is obtained, to obtain according to the real-time intake air temperature, the real-time triethylene glycol concentration and the preset relation
Corresponding balance water dew point is taken, and is modified according to the deviation to obtain corresponding revised balance water dew point and correspond to
For the dry gas water dew point of dewatering system.
15. dry gas water dew point test method according to claim 14, which is characterized in that the deviation value be 5~
11℃；And/or
It is described to be corrected to the preset relation, including preset relation forward direction compensated into the deviation；Or
It is described to be modified according to the deviation to obtain corresponding revised balance water dew point, including, by the balance
Water dew point carries out the positive revised balance water dew point for compensating the deviation to obtain.
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| CN113051828A (en) * | 2021-03-30 | 2021-06-29 | 重庆大学 | Online prediction method for natural gas water dew point driven by technological parameters |
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