CN108980614B - Oil testing, gas testing and recycling integrated natural gas treatment system - Google Patents
Oil testing, gas testing and recycling integrated natural gas treatment system Download PDFInfo
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- CN108980614B CN108980614B CN201810949428.9A CN201810949428A CN108980614B CN 108980614 B CN108980614 B CN 108980614B CN 201810949428 A CN201810949428 A CN 201810949428A CN 108980614 B CN108980614 B CN 108980614B
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 258
- 239000007789 gas Substances 0.000 title claims abstract description 149
- 239000003345 natural gas Substances 0.000 title claims abstract description 129
- 238000011282 treatment Methods 0.000 title claims abstract description 70
- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 238000004064 recycling Methods 0.000 title claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims abstract description 52
- 238000000926 separation method Methods 0.000 claims abstract description 52
- 238000010438 heat treatment Methods 0.000 claims abstract description 51
- 238000011049 filling Methods 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 230000018044 dehydration Effects 0.000 claims description 84
- 238000006297 dehydration reaction Methods 0.000 claims description 84
- 239000002808 molecular sieve Substances 0.000 claims description 77
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 77
- 230000008929 regeneration Effects 0.000 claims description 48
- 238000011069 regeneration method Methods 0.000 claims description 48
- 239000007788 liquid Substances 0.000 claims description 28
- 238000011045 prefiltration Methods 0.000 claims description 22
- 239000004215 Carbon black (E152) Substances 0.000 claims description 20
- 229930195733 hydrocarbon Natural products 0.000 claims description 20
- 150000002430 hydrocarbons Chemical class 0.000 claims description 20
- 239000012071 phase Substances 0.000 claims description 15
- 238000011084 recovery Methods 0.000 claims description 14
- 230000020335 dealkylation Effects 0.000 claims description 7
- 238000006900 dealkylation reaction Methods 0.000 claims description 7
- 239000007791 liquid phase Substances 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 13
- 230000005540 biological transmission Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000003129 oil well Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
Abstract
The invention discloses an oil testing, gas testing and recycling integrated natural gas treatment system which comprises a separation pressure regulating module, a heating throttling module, a compressor assembly, a natural gas treatment module and a CNG filling module, wherein the separation pressure regulating module is connected with the heating throttling module; the inlet end of the separation pressure regulating module is connected with a first raw material gas pipeline; the outlet end of the separation pressure regulating module is connected with the inlet end of the compressor component; the outlet end of the front three-stage supercharging of the compressor assembly is connected with the natural gas treatment module; the inlet end of the heating throttling module is connected with a second raw material gas pipeline; the outlet end of the heating throttling module is connected with the separation voltage regulating module; the outlet end of the natural gas treatment module is connected with a natural gas output pipeline; the outlet end of the natural gas processing module is also connected with the inlet end of the rear three-stage supercharging of the compressor assembly. According to the invention, different functional modules are highly integrated in one prying seat, so that the device can be placed in a flat car to be pulled to the site, and the device can be directly placed in a well site for operation.
Description
Technical Field
The invention relates to the technical field of natural gas treatment, in particular to an oil testing, gas testing and recycling integrated natural gas treatment system.
Background
In the petrochemical field, the scattered single well, remote well, side exploratory well, evaluation well's auxiliary facilities support poorly, can not handle it alone, simultaneously because the natural gas tolerance of these well outputs is little, pressure variation is big, the component difference is big, the tolerance is unstable, production cycle is short, consequently also can't get into the ground gathering and transporting system of oil field and carry out unified gathering and transporting and handle, the natural gas of these single well outputs can not carry out effective recovery, moreover the natural gas of conventional oil test, gas test device extraction adopts the form of burning in situ generally, not only extravagant resource, still cause environmental pollution.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an integrated natural gas treatment system for oil testing, gas testing and recovery, wherein a compressor assembly capable of taking gas from an interstage and treating the natural gas is arranged in the system, the natural gas is pressurized to a proper pressure and then is subjected to treatments such as separation, dehydration, throttling and dealkylation, hydrocarbon liquid recovery and the like through a natural gas treatment module, and the pipe transportation of the treated natural gas and the transportation of CNG tank trucks of the treated compressed natural gas are realized.
In order to achieve the above purpose, the present invention adopts the following technical scheme: an integrated natural gas treatment system for oil test, gas test and recovery comprises a separation pressure regulating module, a heating throttling module, a compressor assembly, a natural gas treatment module and a CNG filling module;
the inlet end of the separation pressure regulating module is connected with a first raw gas pipeline, the first raw gas pipeline is used for conveying wellhead low-pressure gas, the wellhead low-pressure gas is natural gas with the pressure lower than 7MPa, and the separation pressure regulating module is used for separating and regulating the wellhead low-pressure gas;
the outlet end of the separation pressure regulating module is connected with the inlet end of the compressor component through a pipeline, the compressor component can carry out six-stage supercharging on natural gas, and after each stage of supercharging, the supercharged natural gas can be cooled;
the outlet end of the front three-stage supercharging of the compressor assembly is connected with a natural gas treatment module through a pipeline, and the natural gas treatment module carries out dehydration and dealkylation treatment on the supercharged natural gas;
a bypass loop is arranged between the outlet end of the separation pressure regulating module and the inlet end of the natural gas treatment module, and a bypass valve is arranged on the bypass loop;
the inlet end of the heating throttling module is connected with a second raw material gas pipeline, the second raw material gas pipeline is used for conveying wellhead high-pressure gas, and the wellhead high-pressure gas is natural gas with the pressure higher than 7 MPa;
the outlet end of the heating throttling module is connected with the inlet end of the separation pressure regulating module through a pipeline;
the outlet end of the natural gas treatment module is connected with a natural gas output pipeline;
the outlet end of the natural gas treatment module is further connected with the inlet end of the rear three-stage supercharging of the compressor assembly through a pipeline, the outlet end of the rear three-stage supercharging of the compressor assembly is connected with the CNG filling module through a pipeline, and the CNG filling module is used for filling compressed natural gas into the CNG tank wagon.
Preferably, the first raw material gas line is provided with a first stop valve, and the second raw material gas line is provided with a second stop valve.
Preferably, the natural gas treatment module comprises a molecular sieve dehydration module, a molecular sieve regeneration module, a shell-and-tube heat exchanger, a hydrocarbon liquid separator, a second throttle valve and a flash tank.
The molecular sieve dehydration module comprises a first molecular sieve dehydration tower, wherein the top port of the first molecular sieve dehydration tower is connected with the outlet end of a pre-filter through a first air inlet valve in a pipeline manner, the inlet end of the pre-filter is connected with the three-stage supercharging outlet end of the compressor assembly through a first valve in a pipeline manner, and the inlet end of the pre-filter is connected with the outlet end of the separation pressure regulating module through a second valve in a pipeline manner; the bottom port of the first molecular sieve dehydration tower is connected with the tube side inlet end of the tube-shell heat exchanger through a first exhaust valve, the tube side outlet end of the tube-shell heat exchanger is connected with the inlet of the hydrocarbon liquid separator through a second throttle valve, the gas phase outlet of the hydrocarbon liquid separator is connected with the shell side inlet end of the tube-shell heat exchanger, the shell side outlet end of the tube-shell heat exchanger is connected with a natural gas output pipeline through a third valve, and the shell side outlet end of the tube-shell heat exchanger is connected with a four-stage pressurizing inlet of the compressor assembly through a fourth valve; the liquid phase outlet of the hydrocarbon liquid separator is connected with the inlet of the flash tank;
the molecular sieve regeneration module comprises a circulating compressor and a heating heat exchanger, wherein the inlet end of the booster compressor is connected with the shell side outlet end of the shell-and-tube heat exchanger through a regeneration valve, the outlet end of the booster compressor is connected with the gas phase inlet end of the heating heat exchanger through a pipeline, the gas phase outlet end of the heating heat exchanger is connected with the bottom port of a first molecular sieve dehydration tower through a first regeneration air inlet valve, the top port of the first molecular sieve dehydration tower is connected with the inlet end of a cooler through a first regeneration air outlet valve, and the outlet end of the cooler is connected with the inlet end of a pre-filter through a pipeline; and the heat flow inlet end and the heat flow outlet end of the heating heat exchanger are connected with the heat flow circulation module through pipelines.
The molecular sieve dehydration module further comprises a regeneration replacement module, the regeneration replacement module comprises a second molecular sieve dehydration tower, the top port of the second molecular sieve dehydration tower is connected with the outlet end of the pre-filter through a second air inlet valve in a pipeline manner, and the bottom port of the second molecular sieve dehydration tower is connected with the tube side inlet end of the tube shell type heat exchanger through a second air outlet valve in a pipeline manner;
the gas phase outlet end of the heating heat exchanger is connected with the bottom port of the second molecular sieve dehydration tower through a second regeneration air inlet valve in a pipeline manner, and the top port of the second molecular sieve dehydration tower is connected with the inlet end of the cooler through a second regeneration air outlet valve in a pipeline manner.
Preferably, a post filter is arranged on the shell side outlet end of the shell side heat exchanger.
Preferably, the heat flow circulation module comprises a heat conduction oil furnace, wherein a heat conduction oil outlet end of the heat conduction oil furnace is connected with a heat flow inlet end of the heating heat exchanger through a pipeline, and a heat conduction oil reflux end of the heat conduction oil furnace is connected with a heat flow outlet end of the heating heat exchanger through a pipeline.
Preferably, the compressor assembly comprises a first-stage supercharging, a second-stage supercharging, a third-stage supercharging, a fourth-stage supercharging, a fifth-stage supercharging and a sixth-stage supercharging, wherein the first-stage supercharging, the second-stage supercharging and the third-stage supercharging are sequentially connected, and the fourth-stage supercharging, the fifth-stage supercharging and the sixth-stage supercharging are sequentially connected; each stage of supercharging comprises a supercharging cylinder, an air inlet buffer tank, an air outlet buffer tank and a tubular heat exchanger, wherein the inlet end of the supercharging cylinder is connected with the air inlet buffer tank through a pipeline, and the outlet end of the supercharging cylinder is sequentially connected with the air outlet buffer tank and the tube bundle heat exchanger;
the inlet end of the primary supercharging is provided with a buffer tank, and the inlet end of the buffer tank is connected with the outlet end of the separation pressure regulating module through a pipeline; the outlet end of the three-stage supercharging is connected with the inlet end of the natural gas treatment module through a pipeline; the inlet end of the four-stage supercharging is connected with the outlet end of the natural gas treatment module through a pipeline; the outlet end of the six-stage supercharging is sequentially connected with an outlet separator and an outlet filter, and the outlet end of the outlet filter is connected with the CNG filling module;
a first-stage separator is arranged between the first-stage supercharging and the second-stage supercharging;
and liquid outlets of the buffer tank, the primary separator and the outlet separator are all connected to a sewage drain pipeline.
Preferably, a first bypass loop is arranged between the outlet end of the three-stage supercharging and the inlet end of the one-stage supercharging, and a first bypass valve is arranged on the first bypass loop; a second bypass loop is arranged between the outlet end of the six-stage supercharging and the inlet end of the four-stage supercharging, and a second bypass valve is arranged on the second bypass loop.
Preferably, the separation pressure regulating module is two slug flow traps communicated with the upper layer and the lower layer.
Preferably, the heating throttling module comprises a heat exchanger and a first throttling valve which are sequentially connected, the inlet end of the heat exchanger is connected with a second raw material gas pipeline, and the outlet end of the first throttling valve is connected with the inlet end of the separation pressure regulating module in a pipeline manner;
the outlet end of the heat exchanger is further provided with a nozzle sleeve, and the nozzle sleeve is arranged at two ends of the first throttle valve in parallel.
Preferably, the separation pressure regulating module, the heating throttling module and the natural gas treatment module are all arranged on the natural gas treatment pry seat; the compressor assembly and the CNG filling module are arranged on the compressor prying seat, and the natural gas treatment prying seat and the compressor prying seat are arranged on the overall prying seat.
The invention has the following beneficial effects:
(1) According to the integrated natural gas treatment system for testing oil, testing gas and recycling, different functional modules are highly integrated in one sled, and the integrated natural gas treatment system is matched with one compressor assembly capable of taking gas from an interstage to treat the natural gas, so that the device can be placed in a flat car to be pulled to the site, the well site is directly placed for operation, and the moving cost of the device does not exist.
(2) The integrated natural gas treatment system for oil test, gas test and recovery has strong applicability, is designed to fully consider the conditions of fluctuation of treatment capacity, fluctuation of pressure, fluctuation of liquid carrying amount and the like, can be suitable for various wellhead working conditions, can cover wellhead pressure of 0.1-25 Mpa, and can realize two external transportation processes of CNG reloading and external transportation of pipe according to the condition of supporting the wellhead.
(3) The integrated natural gas treatment system for oil test, gas test and recovery is switched among different modules through the valves, so that the combination of the modules is met, and the multiple functions required by the actual situation of a well site can be met.
(4) The molecular sieve dehydration of the integrated natural gas treatment system for oil test, gas test and recovery adopts a closed isobaric regeneration technology, and the regenerated gas is returned to the front end for reprocessing by using a circulating fan, so that the zero emission of the natural gas is realized.
(5) The heating throttling module in the integrated natural gas treatment system for testing oil, testing gas and recycling is provided with the first throttling valve and the oil nozzle sleeve which are arranged in parallel, and the heating throttling module is used for treating high-pressure gas when being communicated with the passage of the first throttling valve so as to facilitate the outward transportation or outward transportation of natural gas; when the oil nozzle sleeve is communicated with the passage, the oil well oil and gas testing requirements are met by replacing different oil nozzles.
Drawings
FIG. 1 is a schematic flow diagram of an integrated oil test, gas test, recovery natural gas processing system of the present invention;
FIG. 2 is a process flow diagram of a compressor assembly of the present invention;
FIG. 3 is a process flow diagram of a natural gas processing module in accordance with the present invention;
FIG. 4 is a schematic view of a natural gas processing skid according to the present invention;
FIG. 5 is a schematic view of a compressor sled base according to the present invention;
FIG. 6 is a schematic flow chart in example 1;
FIG. 7 is a schematic flow chart in example 2;
FIG. 8 is a schematic flow chart in example 3;
FIG. 9 is a schematic flow chart in example 4;
wherein the method comprises the steps of
1-a first valve, 2-a second valve, 3-a pre-filter;
4-a first molecular sieve dehydration tower, 41-a first air inlet valve, 42-a first air outlet valve, 43-a first regeneration air inlet valve, 44-a first regeneration air outlet valve;
5-second molecular sieve dehydration tower, 51-second air inlet valve, 52-second air outlet valve, 53-second regeneration air inlet valve, 54-second regeneration air outlet valve;
6-a circulating compressor, 61-a regeneration valve, 7-a heating heat exchanger, 8-a heat conduction oil furnace, 9-a cooler, 10-a shell-and-tube heat exchanger, 101-a third valve, 102-a fourth valve, 11-a second throttle valve, 12-a hydrocarbon liquid separator and 13-a flash tank;
14-a separation pressure regulating module, 141-a first raw material gas pipeline, 142-a second raw material gas pipeline, 143-a first stop valve, 144-a second stop valve, 145-a bypass loop and 146-a bypass valve;
15-compressor assembly, 150-buffer tank, 151-first stage boost, 152-second stage boost, 153-third stage boost, 154-fourth stage boost, 155-fifth stage boost, 156-sixth stage boost, 157-outlet separator, 158-outlet filter, 159-first stage separator, 1511-boost cylinder, 1512-intake buffer tank, 1513-exhaust buffer tank, 1514-tubular heat exchanger 1514, 1515-first bypass circuit, 1516-first bypass valve, 1517-first bypass circuit, 1518-first bypass valve;
16-a natural gas processing module;
17-heating throttle module, 171-heat exchanger, 172-first throttle valve, 173-oil nozzle sleeve;
18-CNG filling module;
19-post-filter;
20-a natural gas treatment pry seat;
21-compressor sled base.
Detailed Description
The invention will be further described with reference to the drawings and examples.
As shown in fig. 1, an integrated natural gas treatment system for oil testing, gas testing and recovery comprises a separation pressure regulating module 14, a heating throttling module 17, a compressor assembly 15, a natural gas treatment module 16 and a CNG filling module 18, wherein the CNG filling module 18 can adopt a simple filling column;
the inlet end of the separation pressure regulating module 14 is connected with a first raw material gas pipeline 141, the first raw material gas pipeline 141 is used for conveying wellhead low-pressure gas, the wellhead low-pressure gas is natural gas with pressure lower than 7MPa, and the separation pressure regulating module 14 is used for separating and regulating wellhead low-pressure gas;
the outlet end of the separation pressure regulating module 14 is connected with the inlet end of the compressor assembly 15 through a pipeline, a valve is arranged on the pipeline, as shown in fig. 2, the compressor assembly 15 can carry out six-stage grading pressurization on natural gas, and after each stage of pressurization, the pressurized natural gas can be cooled;
the outlet end of the front three-stage supercharging of the compressor assembly 15 is connected with a natural gas treatment module 16 through a pipeline, and the natural gas treatment module 16 carries out dehydration, hydrocarbon removal, throttling, depressurization and cooling treatment on the supercharged natural gas;
a bypass loop 145 is arranged between the outlet end of the separation pressure regulating module 14 and the inlet end of the natural gas treatment module 16, and a bypass valve 146 is arranged on the bypass loop 145;
the inlet end of the heating throttling module 17 is connected with a second raw material gas pipeline 142, the second raw material gas pipeline 142 is used for conveying wellhead high-pressure gas, and the wellhead high-pressure gas is natural gas with pressure higher than 7 MPa;
the outlet end of the heating throttling module 17 is connected with the inlet end of the separation pressure regulating module 14 through a pipeline;
the outlet end of the natural gas treatment module 16 is connected with a natural gas output pipeline;
the outlet end of the natural gas processing module 16 is further connected with the inlet end of the rear three-stage supercharging of the compressor assembly 15 through a pipeline, the outlet end of the rear three-stage supercharging of the compressor assembly is connected with the CNG filling module 18 through a pipeline, and the CNG filling module 18 fills compressed natural gas into the CNG tank car.
Preferably, the first raw material gas line 141 is provided with a first stop valve 143, and the second raw material gas line 142 is provided with a second stop valve 144.
Preferably, as shown in fig. 3, the natural gas processing module 16 includes a molecular sieve dehydration module, a molecular sieve regeneration module, a shell-and-tube heat exchanger 10, a hydrocarbon liquid separator 12, a second throttle valve 11, and a flash tank 13
The molecular sieve dehydration module comprises a first molecular sieve dehydration tower 4, wherein the top port of the first molecular sieve dehydration tower 4 is connected with the outlet end of a pre-filter 3 through a first air inlet valve 41 in a pipeline manner, the inlet end of the pre-filter 3 is connected with the three-stage supercharging outlet end of a compressor assembly 15 through a first valve 1 in a pipeline manner, and the inlet end of the pre-filter 3 is also connected with the outlet end of a separation pressure regulating module 14 through a second valve 2 in a pipeline manner; the bottom port of the first molecular sieve dehydration tower 4 is connected with the tube side inlet end of the tube-shell heat exchanger 10 through a first exhaust valve 42, the tube side outlet end of the tube-shell heat exchanger 10 is connected with the inlet of the hydrocarbon liquid separator 12 through a second throttle valve 11, the gas phase outlet of the hydrocarbon liquid separator 12 is connected with the shell side inlet end of the tube-shell heat exchanger 10, the shell side outlet end of the tube-shell heat exchanger 10 is connected with a natural gas output pipeline through a third valve 101, and the shell side outlet end of the tube-shell heat exchanger 10 is connected with the four-stage supercharging inlet of the compressor assembly 15 through a fourth valve 102; the liquid phase outlet of the hydrocarbon liquid separator 12 is connected with the inlet of the flash tank 13;
the molecular sieve regeneration module comprises a circulating compressor 6 and a heating heat exchanger 7, wherein the inlet end of the pressurizing compressor 6 is connected with the shell side outlet end of the shell-and-tube heat exchanger 10 through a regeneration valve 61, the outlet end of the pressurizing compressor 6 is connected with the gas phase inlet end of the heating heat exchanger 7 through a pipeline, the gas phase outlet end of the heating heat exchanger 7 is connected with the bottom port of the first molecular sieve dehydration tower 4 through a first regeneration air inlet valve 43, the top port of the first molecular sieve dehydration tower 4 is connected with the inlet end of the cooler 9 through a first regeneration air outlet valve 44, and the outlet end of the cooler 9 is connected with the inlet end of the pre-filter 3 through a pipeline; and a heat flow inlet end and a heat flow outlet end of the heating heat exchanger 7 are connected with the heat flow circulation module through pipelines.
The molecular sieve dehydration module further comprises a regeneration replacement module, the regeneration replacement module comprises a second molecular sieve dehydration tower 5, the top port of the second molecular sieve dehydration tower 5 is connected with the outlet end of the pre-filter 3 through a second air inlet valve 51 in a pipeline manner, and the bottom port of the second molecular sieve dehydration tower 5 is connected with the tube side inlet end of the shell-and-tube heat exchanger 10 through a second air outlet valve 52 in a pipeline manner;
the gas phase outlet end of the heating heat exchanger 7 is connected with the bottom port of the second molecular sieve dehydration tower 5 through a second regeneration air inlet valve 53, and the top port of the second molecular sieve dehydration tower 5 is connected with the inlet end of the cooler 9 through a second regeneration air outlet valve 54.
The dehydration part of the natural gas treatment module 16 comprises a molecular sieve dehydration module, a molecular sieve regeneration module and a regeneration replacement module, and the connection relation between the molecular sieve dehydration module, the molecular sieve regeneration module and the regeneration replacement module enables the whole system to realize one-tower dehydration and one-tower regeneration, so that the continuous performance of a natural gas dehydration process is ensured, and the method is as follows:
taking the first molecular sieve dehydration tower 4 for dehydration and the second molecular sieve dehydration tower 5 for regeneration as an example, at this time, the first air inlet valve 41 and the first air outlet valve 42 are opened, and the first air inlet valve 43 and the first air outlet valve 44 are closed, so as to implement the dehydration flow of the first molecular sieve dehydration tower 4; the second air inlet valve 51 and the second air outlet valve 52 are closed, and the second regeneration air inlet valve 53 and the second regeneration air outlet valve 54 are opened, so as to realize the regeneration flow of the second molecular sieve dehydration tower 5.
The wellhead low-pressure gas enters a pre-filter 3 to remove corresponding liquid and solid phase impurities after the wellhead low-pressure gas is subjected to the separation pressure regulation of a separation pressure regulation module 14 and the pressurization of the front three stages of a compressor assembly 15, and the wellhead high-pressure gas is subjected to the throttling pressure reduction of a heating throttling module 17 and the separation action of the separation pressure regulation module 14, and then enters a first molecular sieve dehydration tower 4 through a first air inlet valve 41 which is opened, so that when the moist air flow entering the molecular sieve dehydration tower flows through a molecular sieve bed from top to bottom, the water vapor in the air flow is continuously adsorbed to the surface of a hydrophilic drying agent, and when the air flow flows out from the tail end of the bed, the water vapor remained in the air is very trace, so that the use requirement of normal-pressure water dew point-55 ℃ is met, the dehydration purpose is achieved, and the dry natural gas with low dew point is obtained; the natural gas dehydrated by the first molecular sieve dehydration tower 4 enters a tube side inlet of the tube-and-shell heat exchanger 10 through a bottom port of the first molecular sieve dehydration tower 4, the tube-and-shell heat exchanger 10 is used for realizing precooling of dehydrated gas, hot gas flow after dehydration enters the tube-and-shell heat exchanger 10 for dynamic heat exchange and is precooled to 0 to minus 6 ℃, and precooled gas enters the second throttle valve 11 from a tube side outlet end of the tube-and-shell heat exchanger 10 for throttling and depressurization; during the process of throttling and depressurization, hydrocarbon liquid can be continuously separated out, and the formed gas-liquid two-phase flow flows into the hydrocarbon liquid separator 12 to separate gas and liquid hydrocarbon; the separated gas flows out from the upper part of the hydrocarbon liquid separator 12 and enters the shell side of the shell-and-tube heat exchanger 10 as a refrigerant to exchange heat with the dehydrated dry hot gas flow, and the reheating of the hot gas flow is realized while cooling the hot gas flow; after throttling and depressurization through the second throttling valve 11, the gas flowing out of the shell pass of the shell-and-tube heat exchanger 10 can be depressurized to 2.5-4.0MPa and directly enters a natural gas output pipeline for output; after throttling and depressurization through the second throttling valve 11, the gas flowing out of the shell side of the shell-and-tube heat exchanger 10 can be depressurized to about 1.5MPa and then re-enter a four-stage pressurizing inlet of the compressor assembly 15 to be pressurized again, the pressurizing reaches 25MPa, the gas is cooled and then is filled into CNG tank cars through CNG filling modules arranged on a unit, and the CNG tank cars are transported outwards; the separated liquid hydrocarbon is heated to more than 0 ℃ after entering the flash tank 13, so that the water is prevented from being frozen and plugged after being discharged into a sewage pipeline with water.
Meanwhile, part of purified natural gas at the shell side outlet end of the shell-and-tube heat exchanger 10 is conveyed into the heating heat exchanger 7 through the booster compressor 6 to exchange heat with heat conduction oil in the heat conduction oil furnace 8, the warmed purified natural gas enters the second molecular sieve dehydration tower 5 through the bottom port of the second molecular sieve dehydration tower 5, water adsorbed by an adsorbent is removed to recover the activity of the adsorbent, the adsorbent becomes damp regenerated gas, and the wet regenerated gas is cooled through the top port of the second molecular sieve dehydration tower 5 through the cooler 9, conveyed to the inlet end of the pre-filter 3 through a pipeline and enters the molecular sieve dehydration module together with the incoming gas to be dehydrated.
Similarly, when the first molecular sieve dehydration tower 4 performs a regeneration process and the second molecular sieve dehydration tower 5 performs a dehydration process, the on-off state of the corresponding valve is changed only: the first air inlet valve 41 and the first air outlet valve 42 are closed, the first regeneration air inlet valve 43 and the first regeneration air outlet valve 44 are opened, so as to realize the regeneration process of the first molecular sieve dehydration tower 4; the second air inlet valve 51 and the second air outlet valve 52 are opened, the second regeneration air inlet valve 53 and the second regeneration air outlet valve 54 are closed, and the dehydration process of the second molecular sieve dehydration tower 5 is realized.
Preferably, a post-filter 19 is arranged on the shell side outlet end of the shell-and-tube heat exchanger 10.
Preferably, the heat flow circulation module comprises a heat conduction oil furnace 8, wherein a heat conduction oil outlet end of the heat conduction oil furnace 8 is connected with a heat flow inlet end of the heating heat exchanger 7 in a pipeline manner, and a heat conduction oil reflux end of the heat conduction oil furnace 8 is connected with a heat flow outlet end of the heating heat exchanger 7 in a pipeline manner; the heat conduction oil in the heat conduction oil furnace 8 is conveyed to a heating heat exchanger through an internal high-temperature oil pump to exchange heat with dehydrated purified natural gas, the temperature of the heat conduction oil after the heat exchange is reduced, and the heat conduction oil flows back to the heat conduction oil furnace 8 to be heated, so that a complete heat flow circulation flow is formed.
Preferably, as shown in fig. 2, the compressor assembly 15 includes a first-stage boost 151, a second-stage boost 152, a third-stage boost 153, a fourth-stage boost 154, a fifth-stage boost 155, and a sixth-stage boost 156, where the first-stage boost 151, the second-stage boost 152, and the third-stage boost 153 are sequentially connected, and the fourth-stage boost 154, the fifth-stage boost 155, and the sixth-stage boost 156 are sequentially connected; each stage of pressurization comprises a pressurization cylinder 1511, an air inlet buffer tank 1512, an exhaust buffer tank 1513 and a tubular heat exchanger 1514, wherein the inlet end of the pressurization cylinder 1511 is connected with the air inlet buffer tank 1512 in a pipeline manner, and the outlet end of the pressurization cylinder 1512 is sequentially connected with the exhaust buffer tank 1513 and the tube bundle heat exchanger 1514;
the inlet end of the primary supercharging 151 is provided with a buffer tank 150, and the inlet end of the buffer tank 150 is connected with the outlet end of the separation voltage regulating module 14 in a pipeline manner; the outlet end of the three-stage supercharging 153 is connected with the inlet end of the natural gas treatment module 16 in a pipeline manner; the inlet end of the four stage plenum 154 is in plumbing connection with the outlet end of the natural gas processing module 16; the outlet end of the six-stage supercharging 156 is sequentially connected with an outlet separator 157 and an outlet filter 158, and the outlet end of the outlet filter 158 is connected with a CNG filling module;
a primary separator 159 is arranged between the primary boost 151 and the secondary boost 152;
the drain ports of the buffer tank 150, the primary separator 159 and the outlet separator 157 are all connected to a sewage drain line;
in addition, corresponding valves are arranged at the inlet and the outlet of each device to ensure the connection and disconnection of each pipeline.
Preferably, a first bypass loop 1515 is arranged between the outlet end of the three-stage supercharging 153 and the inlet end of the one-stage supercharging 151, and a first bypass valve 1516 is arranged on the first bypass loop 1515; a second bypass loop 1517 is arranged between the outlet end of the six-stage supercharging 156 and the inlet end of the four-stage supercharging 154, and a second bypass valve 1518 is arranged on the second bypass loop 1517;
preferably, the separation pressure regulating module 14 is two slug flow traps communicated with the upper layer and the lower layer; the incoming gas enters from the top of the upper section plug flow catcher, and the liquid carried in the gas falls into the lower section plug flow catcher, so that the impact of the section plug flow on the rear-end processing equipment is avoided.
Preferably, the heating throttle module 17 includes a heat exchanger 171 and a first throttle valve 172 connected in sequence, wherein an inlet end of the heat exchanger 171 is connected with the second raw material gas pipeline 142, and an outlet end of the first throttle valve 172 is connected with an inlet end of the separation pressure regulating module 14 in a pipeline manner; a heat exchanger 171 is added before the first throttle valve 172, and the temperature of the medium after throttling is higher than the hydrate generation temperature through heating, so that freezing blockage is avoided;
the outlet end of the heat exchanger 171 is also provided with a nozzle sleeve 173, and the nozzle sleeve 173 is arranged at two ends of the first throttle valve 172 in parallel;
when the high-pressure gas produced by the normal recovery well is recovered, the high-pressure gas sequentially enters the heat exchanger 171 and the first throttle valve 172 through the second raw gas pipeline 142, then enters the separation pressure regulating module 14, and then is subjected to subsequent treatment, so that the natural gas is transported out through the pipeline or the tank car;
when oil or gas testing is needed for a newly drilled well, after the second raw gas pipeline 142 enters the heat exchanger 171, the oil nozzle can be replaced according to the requirement through a passage provided with the oil nozzle sleeve 173, so that the oil and gas testing requirement is met; namely, the parallel arrangement of the first throttle valve 172 and the choke sleeve 173 in the heating throttle module 17 not only realizes the treatment and recovery of high-pressure gas, but also can test oil in an oil well and gas in a gas well.
Preferably, as shown in fig. 4, the separation pressure regulating module 14, the heating throttling module 17 and the natural gas processing module 16 are all arranged on the natural gas processing pry seat 20; as shown in fig. 5, the compressor assembly 15 and the CNG filling module 18 are both disposed on a compressor skid 21, and the natural gas processing skid 20 and the compressor skid 21 are both disposed on an overall skid; in the high integration of different functional modules, the device can be placed in a flat car to be pulled to the site by matching with a compressor component which can take gas from an interstage to treat natural gas, and the device can be directly placed in a well site to operate without moving cost of the device.
An integrated natural gas treatment system for oil test, gas test and recovery comprises the following specific embodiments:
example 1:
the wellhead incoming gas is low-pressure gas (lower than 7 MPa), and the process of the external transmission through the natural gas external transmission pipeline after being processed by the system is as follows:
when the wellhead incoming gas pressure is lower than the lowest allowable working pressure of molecular sieve adsorption dehydration and throttling, cooling and dealkylation of the second throttle valve 11 of the natural gas treatment module 16, at the moment, the wellhead incoming gas is required to be separated and regulated by the separation pressure regulating module 14, the wellhead incoming gas is treated to 0.1-0.35MPa and then is connected into the first three stages (first, second and third stages) of the compressor assembly 15 to be pressurized to 7.0-8.0MPa, the cooled gas leaves the compressor assembly and is connected into the natural gas treatment module 16, enters the molecular sieve dehydration tower for dehydration after passing through the pre-filter 3, and is throttled and depressurized by the second throttle valve 11, and the gas pressure after passing through the natural gas treatment module 16 is 2.5-4.0MPa and then is connected into a natural gas external transmission pipeline for output.
The schematic of the flow chart in example 1 is shown in fig. 6, in which the first three stages of compression flow of the compressor assembly 15 are normally put into operation, and then the three stages of compression flow are internally circulated through the second bypass loop 1517 and the second bypass valve 1518.
Example 2:
the wellhead incoming gas is low-pressure gas (lower than 7 MPa), and the flow of the incoming gas which is processed by the system and then is transported outside through the CNG tank wagon is as follows:
when the wellhead incoming gas pressure is lower than the lowest allowable working pressure of molecular sieve adsorption dehydration and throttling, cooling and dealkylation of the second throttle valve 11 of the natural gas treatment module 16, at the moment, the wellhead incoming gas is required to be separated and regulated by the separation pressure regulating module 14, the wellhead incoming gas is treated to 0.1-0.35MPa and then is connected to the first three-stage (first, second and third stages) stage supercharging of the compressor assembly 15 to reach 7.0-8.0MPa, cooled gas leaves the compressor assembly and is connected to the natural gas treatment module 16, the cooled gas enters the molecular sieve dehydration tower to be dehydrated after passing through the pre-filter 3, the dehydrated gas is subjected to precooling of the shell-and-tube heat exchanger 10 and is throttled and depressurized by the second throttle valve 11, the gas pressure after passing through the natural gas treatment module 16 is about 1.5MPa, then is connected to the fourth-stage air inlet of the compressor assembly 15, the pressure after the last three-stage (fourth, fifth and sixth stages) stage supercharging of the compressor assembly 15 reaches 25MPa, the compressed gas is cooled and then is filled in a tank wagon through a CNG filling module configured on the CNG tank wagon.
The schematic of the flow chart in example 2 is shown in fig. 7, in which the first three-stage compression flow and the second three-stage compression flow of the compressor assembly 15 are normally put into use.
Example 3:
the wellhead incoming gas is high-pressure gas (higher than 7 MPa), and the process of the natural gas external transmission pipeline external transmission after being processed by the system is as follows:
when the wellhead incoming gas pressure is higher than the minimum allowable working pressure of molecular sieve adsorption dehydration and throttling, cooling and dealkylation of the second throttle valve 11 of the natural gas processing module 16, in order to avoid dangerous accidents caused by the fact that the air inlet pressure exceeds the upper limit value of the design pressure of a corresponding container, the wellhead incoming gas with high pressure needs to be depressurized through the heating throttle module 17, the wellhead incoming gas is processed to 7.0-8.0MPa, then is directly connected into the natural gas processing module 16 through the bypass loop 145 after being subjected to liquid removal through the separation pressure regulating module 14, enters the molecular sieve dehydration tower for dehydration through the pre-filter 3, and the dehydrated gas is subjected to precooling through the shell-and-tube heat exchanger 10 and throttling and depressurization through the second throttle valve 11, and is connected into a natural gas external transmission pipeline for external transmission after the gas pressure is 2.5-4.0 MPa.
A schematic of the flow in example 3 is shown in fig. 8, in which the compressor assembly 15 is not operating.
Example 4:
the wellhead incoming gas is high-pressure gas (higher than 7 MPa), and the flow of the external transportation of the CNG tank wagon after the treatment of the system is as follows:
when the wellhead incoming gas pressure is higher than the lowest allowable working pressure of molecular sieve adsorption dehydration and throttling, cooling and dealkylation of the second throttle valve 11 of the natural gas processing module 16, in order to avoid dangerous accidents caused by the fact that the air inlet pressure exceeds the upper limit value of the design pressure of a corresponding container, the wellhead incoming gas with high pressure needs to be depressurized through the heating throttle module 17, the wellhead incoming gas is processed to 7.0-8.0MPa, then liquid is removed through the separation pressure regulating module 14, the wellhead incoming gas is directly connected into the natural gas processing module 16 through the bypass loop 145, the natural gas enters the molecular sieve dehydration tower for dehydration after passing through the pre-filter 3, the dehydrated gas is subjected to precooling through the shell-and-tube heat exchanger 10 and throttled and depressurized through the second throttle valve 11, the gas pressure after passing through the natural gas processing module 16 is about 1.5MPa, then is connected to the four-stage air inlet of the compressor assembly 15, the pressure reaches 25MPa after the staged pressurization of the rear three stages (four stages, five stages and six stages) of the compressor assembly 15, the CNG is filled through the filling module arranged on a CNG tank truck after the CNG is cooled, and the CNG is transported outside the CNG tank truck.
A schematic of the flow chart in example 4 is shown in fig. 9, in which the first three-stage compression flow of the compressor assembly is internally circulated through the first bypass loop 1515 and the first bypass valve 1516, and then the third-stage compression flow is normally put into use.
Example 5:
when oil well oil and gas well gas test is needed, wellhead liquid or gas enters the heat exchanger 171 through the second raw gas pipeline 142, and then the oil nozzle can be replaced according to the requirement through the loop of the oil nozzle sleeve 173, so as to meet the oil and gas test requirement; then enters a separation pressure regulating module 14, if the oil well is used for oil testing, the separation pressure regulating module 14 is equivalent to a gas-liquid separator, the separated gas enters a subsequent compressor assembly 15 and a natural gas treatment module 16 for corresponding treatment and then is transported or transported outwards, so that the gas phase is prevented from being burned in situ, the energy is wasted, and meanwhile, the separated liquid phase is also subjected to corresponding treatment; if the gas well is tested, the separation pressure regulating module 14 is equivalent to a slug flow catcher, the trapped liquid phase enters the bottom of the slug flow catcher, and the gas phase enters the subsequent compressor assembly 15 and the natural gas processing module 16 for corresponding processing and then is transported or transported outwards, so that the gas phase is prevented from being burned in situ and energy is wasted.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (7)
1. The integrated natural gas treatment system for oil test, gas test and recovery is characterized by comprising a separation pressure regulating module, a heating throttling module, a compressor assembly, a natural gas treatment module and a CNG filling module;
the inlet end of the separation pressure regulating module is connected with a first raw gas pipeline, the first raw gas pipeline is used for conveying wellhead low-pressure gas in a pipe manner, and the separation pressure regulating module is used for separating and regulating wellhead low-pressure gas;
the outlet end of the separation pressure regulating module is connected with the inlet end of the compressor component through a pipeline, the compressor component can carry out six-stage supercharging on natural gas, and after each stage of supercharging, the supercharged natural gas can be cooled;
the outlet end of the front three-stage supercharging of the compressor assembly is connected with a natural gas treatment module through a pipeline, and the natural gas treatment module carries out dehydration and dealkylation treatment on the supercharged natural gas;
a bypass loop is arranged between the outlet end of the separation pressure regulating module and the inlet end of the natural gas treatment module, and a bypass valve is arranged on the bypass loop;
the inlet end of the heating throttling module is connected with a second raw material gas pipeline, and the second raw material gas pipeline is used for conveying wellhead high-pressure gas in a pipe manner;
the outlet end of the heating throttling module is connected with the inlet end of the separation pressure regulating module through a pipeline;
the outlet end of the natural gas treatment module is connected with a natural gas output pipeline;
the outlet end of the natural gas treatment module is also connected with the inlet end of the rear three-stage supercharging of the compressor assembly through a pipeline, the outlet end of the rear three-stage supercharging of the compressor assembly is connected with the CNG filling module through a pipeline, and the CNG filling module fills compressed natural gas into the CNG tank wagon;
the natural gas treatment module comprises a molecular sieve dehydration module, a molecular sieve regeneration module, a shell-and-tube heat exchanger, a hydrocarbon liquid separator, a second throttle valve and a flash tank;
the molecular sieve dehydration module comprises a first molecular sieve dehydration tower, wherein the top port of the first molecular sieve dehydration tower is connected with the outlet end of a pre-filter through a first air inlet valve in a pipeline manner, the inlet end of the pre-filter is connected with the three-stage supercharging outlet end of the compressor assembly through a first valve in a pipeline manner, and the inlet end of the pre-filter is connected with the outlet end of the separation pressure regulating module through a second valve in a pipeline manner; the bottom port of the first molecular sieve dehydration tower is connected with the tube side inlet end of the tube-shell heat exchanger through a first exhaust valve, the tube side outlet end of the tube-shell heat exchanger is connected with the inlet of the hydrocarbon liquid separator through a second throttle valve, the gas phase outlet of the hydrocarbon liquid separator is connected with the shell side inlet end of the tube-shell heat exchanger, the shell side outlet end of the tube-shell heat exchanger is connected with a natural gas output pipeline through a third valve, and the shell side outlet end of the tube-shell heat exchanger is connected with a four-stage pressurizing inlet of the compressor assembly through a fourth valve; the liquid phase outlet of the hydrocarbon liquid separator is connected with the inlet of the flash tank;
the molecular sieve regeneration module comprises a circulating compressor and a heating heat exchanger, wherein the inlet end of the circulating compressor is connected with the shell side outlet end of the shell-and-tube heat exchanger through a regeneration valve, the outlet end of the circulating compressor is connected with the gas phase inlet end of the heating heat exchanger through a pipeline, the gas phase outlet end of the heating heat exchanger is connected with the bottom port of a first molecular sieve dehydration tower through a first regeneration air inlet valve, the top port of the first molecular sieve dehydration tower is connected with the inlet end of a cooler through a first regeneration air outlet valve, and the outlet end of the cooler is connected with the inlet end of a pre-filter through a pipeline; the heat flow inlet end and the heat flow outlet end of the heating heat exchanger are connected with the heat flow circulation module through pipelines;
the molecular sieve dehydration module further comprises a regeneration replacement module, the regeneration replacement module comprises a second molecular sieve dehydration tower, the top port of the second molecular sieve dehydration tower is connected with the outlet end of the pre-filter through a second air inlet valve in a pipeline manner, and the bottom port of the second molecular sieve dehydration tower is connected with the tube side inlet end of the tube shell type heat exchanger through a second air outlet valve in a pipeline manner;
the gas phase outlet end of the heating heat exchanger is connected with the bottom port of the second molecular sieve dehydration tower through a second regeneration air inlet valve, and the top port of the second molecular sieve dehydration tower is connected with the inlet end of the cooler through a second regeneration air outlet valve;
the compressor assembly comprises a first-stage supercharging, a second-stage supercharging, a third-stage supercharging, a fourth-stage supercharging, a fifth-stage supercharging and a sixth-stage supercharging, wherein the first-stage supercharging, the second-stage supercharging and the third-stage supercharging are sequentially connected, and the fourth-stage supercharging, the fifth-stage supercharging and the sixth-stage supercharging are sequentially connected; each stage of supercharging comprises a supercharging cylinder, an air inlet buffer tank, an air outlet buffer tank and a tubular heat exchanger, wherein the inlet end of the supercharging cylinder is connected with the air inlet buffer tank through a pipeline, and the outlet end of the supercharging cylinder is sequentially connected with the air outlet buffer tank and the tube bundle heat exchanger;
the inlet end of the primary supercharging is provided with a buffer tank, and the inlet end of the buffer tank is connected with the outlet end of the separation pressure regulating module through a pipeline; the outlet end of the three-stage supercharging is connected with the inlet end of the natural gas treatment module through a pipeline; the inlet end of the four-stage supercharging is connected with the outlet end of the natural gas treatment module through a pipeline; the outlet end of the six-stage supercharging is sequentially connected with an outlet separator and an outlet filter, and the outlet end of the outlet filter is connected with the CNG filling module;
a first-stage separator is arranged between the first-stage supercharging and the second-stage supercharging;
the liquid outlets of the buffer tank, the primary separator and the outlet separator are all connected to a sewage drain pipeline;
the heating throttling module comprises a heat exchanger and a first throttling valve which are sequentially connected, the inlet end of the heat exchanger is connected with a second raw material gas pipeline, and the outlet end of the first throttling valve is connected with the inlet end of the separation pressure regulating module in a pipeline manner;
the outlet end of the heat exchanger is further provided with a nozzle sleeve, and the nozzle sleeve is arranged at two ends of the first throttle valve in parallel.
2. The integrated system for testing oil, testing gas and recovering natural gas according to claim 1, wherein a first stop valve is arranged on the first raw gas pipeline, and a second stop valve is arranged on the second raw gas pipeline.
3. The integrated oil testing, gas testing and recovering natural gas processing system according to claim 1, wherein a post-filter is arranged on the shell side outlet end of the shell-and-tube heat exchanger.
4. The integrated oil and gas testing and recovery natural gas processing system according to claim 1, wherein the heat flow circulation module comprises a heat conduction oil furnace, a heat conduction oil outlet end of the heat conduction oil furnace is connected with a heat flow inlet end of the heating heat exchanger through a pipeline, and a heat conduction oil return end of the heat conduction oil furnace is connected with a heat flow outlet end of the heating heat exchanger through a pipeline.
5. The integrated oil testing, gas testing and recycling natural gas processing system according to claim 1, wherein a first bypass loop is arranged between the outlet end of the three-stage supercharging and the inlet end of the one-stage supercharging, and a first bypass valve is arranged on the first bypass loop; a second bypass loop is arranged between the outlet end of the six-stage supercharging and the inlet end of the four-stage supercharging, and a second bypass valve is arranged on the second bypass loop.
6. The integrated oil testing, gas testing and recycling natural gas processing system according to claim 1, wherein the separation pressure regulating module is two slug flow traps communicated in an upper layer and a lower layer.
7. The integrated oil testing, gas testing and recycling natural gas treatment system according to claim 1, wherein the separation pressure regulating module, the heating throttling module and the natural gas treatment module are arranged on a natural gas treatment pry seat; the compressor assembly and the CNG filling module are arranged on the compressor prying seat, and the natural gas treatment prying seat and the compressor prying seat are arranged on the overall prying seat.
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| CN109708001B (en) * | 2019-01-15 | 2023-12-05 | 上海飞奥燃气设备有限公司 | Safe and reliable fuel gas sled of low energy consumption |
| CN109681780B (en) * | 2019-02-21 | 2023-10-31 | 中国石油工程建设有限公司 | Complete gas well supercharging system based on reciprocating compressor and operation method |
| CN110317650A (en) * | 2019-07-26 | 2019-10-11 | 合肥哈工新能源科技有限公司 | A kind of vehicular well head gas recovery system |
| CN110761746B (en) * | 2019-11-21 | 2023-08-11 | 西安德林石油工程有限公司 | Gas well liquid draining method and device |
| CN110761752B (en) * | 2019-11-21 | 2023-08-22 | 西安德林石油工程有限公司 | Natural gas wellhead air extraction pressurization method and device |
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