CN107365607A - A kind of compact natural gas suitable for offshore platform pre-processes purification method - Google Patents
A kind of compact natural gas suitable for offshore platform pre-processes purification method Download PDFInfo
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- CN107365607A CN107365607A CN201710662059.0A CN201710662059A CN107365607A CN 107365607 A CN107365607 A CN 107365607A CN 201710662059 A CN201710662059 A CN 201710662059A CN 107365607 A CN107365607 A CN 107365607A
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from 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
-
- 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
-
- 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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/54—Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel
- C10L2290/545—Washing, scrubbing, stripping, scavenging for separating fractions, components or impurities during preparation or upgrading of a fuel
-
- 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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/56—Specific details of the apparatus for preparation or upgrading of a fuel
Abstract
The present invention relates to offshore platform natural gas deep purification treatment method, and natural qi exhaustion liquid method before and after the original compressor of offshore platform is optimized, and is handled suitable for the deep natural gas of offshore natural gas production platform extraction.The natural gas produced by close-coupled line processing unit line processing after, remove natural gas in Soluble salt ions and most of water.The efficient scrubber tank of import is subsequently entered, enters compressor after the efficient scrubber tank dehydration of entrance, the outlet high-efficient washing tank set after compressor carries out further efficiently removing liquid to compressor discharge gas.The efficient scrubber tank of described import and export has identical internal structure, and gas passes sequentially through inertial separation distributor, micro- cyclone, fin separation module, fibre deposition module, reaches the effect that High-efficiency Gas takes off liquid.This method removes the Soluble salt ions in natural gas, then carries out efficiently de- liquid, solves from source and is shut down because compressor is eccentric caused by natural gas band salt-containing liquid, the problems such as corrosive pipeline.
Description
Technical field
The present invention relates to offshore platform natural gas deep purification treatment method, suitable for the depth of offshore platform extraction natural gas
Spend treatment and purification.
Background technology
With the fast development of economy, the size of population is constantly increased sharply, and energy consumption is continuously increased, and greenhouse gases etc. are various
Noxious gas emission getting worse, the living environment of the mankind constantly deteriorate.The high natural gas energy resource of clean environment firendly, calorific value is increasingly received
To the attention of China and countries in the world, greatly develop gas industry and have become sustainable economic, the improvement its people of various countries' development
The inevitable choice of living environment.
Quickly propelled with the fast development and industrialization, urbanization of economy, China's total energy consumption is continuously and healthily
Increase.In recent years, China's natural gas has been enter into the fast-developing phase.Natural gas is accelerated development, is increase energy supply, the optimization energy
Structure, preserve the ecological environment, control the very real selection of greenhouse gas emission.China East Sea, the South Sea are found that a large amount of days
Right gas deposit, it is seen that the exploitation of offshore natural gas will turn into the field that a China gives priority in the future.
Due to a large amount of vapor of natural oil-containing in natural gas, and the vapor in natural gas is typically in saturation state, tool
Body content with its residing for temperature, pressure, gas component etc. have very big contact.With natural gas from underground produce, its temperature
Pressure and other parameters necessarily change.Now, have the vapor in portion of natural gas and become aqueous water precipitation, and in natural gas
Oil-containing aqueous water has very big harm to subsequent technique.Specific manifestation is as follows：(1) some gas molecules insertion hydrone of natural gas
Hydrate can be formed in lattice, gas hydrates are the solid matters that a kind of form is similar to snow or loose ice, caused
Hydrate can be accumulated at pipeline, valve and instrument and then blocking pipeline, valve and instrument, and physical destruction is produced to it, because
This will prevent the generation of hydrate.(2) natural gas containing sour gas such as H2S, CO2, after these sour gas are dissolved in water
The stronger acid solution of corrosivity can be formed, causes the corrosion and damage of pipeline and equipment.(3) natural gas on stream, band
The ground end water gone out often contains dense mineral salt, when ground technological process apparatus are inefficient except liquid, may result in
The free water of the mineral salt containing high concentration enters compressor with natural gas on a small quantity, during multi-stage compression, gas temperature rise,
Moisture evaporation under the high temperature conditions, soluble-salt separate out and are attached to the impeller surface of compressor drum, form salt crust, make compression
The dynamic equilibrium state of machine is destroyed, and bias occurs, and ultimately results in compressor and severe shocks occur and then close down.
Currently used dehydration technique has the methods of cryogenic condensation dehydration, triethylene glycol dehydration, molecular sieve dehydration.Cryogenic condensation
Cryogenic dewatering condensation method belongs to physics dehydration.Most common equipment has J-T valves and turbo-expander, because this method is to high pressure day
Right gas purification is very economical, but generally requires addition inhibitor to prevent the generation of hydrate；Need to additionally it increase during deep dehydration
Refrigeration plant, cost are higher；It is big for the high-speed rotary part manufacture difficulty in turbine.Triethylene glycol dehydration belongs to solvent absorption
Method, in the industry using quite varied, this method stability is high but system is excessively complicated, safeguards inconvenience, and triethylene glycol regeneration needs
Want energy consumption higher and easily lose.Molecular sieve dehydration is owned by France in solid absorption method, and its adsorptive selectivity is strong, and adsorption efficiency is high, but
Its operating cost is high, and equipment investment is huge, and adsorbent price is high and regeneration energy consumption is high.These most important methods are pins
Moisture in natural gas is removed, does not remove the soluble-salt in the high mineral content water of ground end of natural gas entrainment, this
Sample once has a small amount of water not remove, and still the operation of the equipment such as subsequent compression machine can be had an immense impact on.Therefore, need one kind side badly
Method is removed the Soluble salt ions that natural gas is carried secretly while moisture in efficient removal natural gas.
The content of the invention
In view of problem above, the invention provides offshore platform natural gas deep purification treatment method.
Specific technical scheme is as follows：
Offshore platform natural gas deep purification treatment method, comprises the following steps：
(1) natural gas produced enters system by gas phase entrance A, after the online processing unit of close-coupled (1) processing, gas
Mutually flow into the efficient scrubber tank of import (3) and carry out efficiently de- liquid；
(2) natural gas produced produced enters system by gas phase entrance A, through the online processing unit of close-coupled (1)
After processing, the liquid of removing enters the efficient scrubber tank of import (3)；
(3) step (1), described in (2), handle, specifically include, natural gas by the online processing unit of close-coupled (1)
Pass sequentially through spray washing unit (1-2) to inject recirculated water in natural gas, the uniform unit of umbrella gas-liquid (1-3) is to mixed material
It is distributed in advance, gas-liquid two-phase is uniformly mixed into follow-up mixing mass transfer unit, natural gas, washings mixing mass transfer unit
(1-4) uses efficient hybrid element, gas-liquid two-phase is fully contacted, fully washing, makes rotation unit (1-5) by the water of mixed material
Flat conversion of motion is rotary motion, and using the online quick separating of centrifugal force solid line gas-liquid two-phase, natural gas, washings separation are single
The position of first (1-6) using the gas-liquid two-phase after making rotation unit in pipeline is different, gas-liquid two-phase is separated, after processing
Gas-liquid two-phase go to next technological process respectively；
(4) liquid in step (2) in the efficient scrubber tank of import (3) as circulation fluid by circulating mouth of a river C1, via pipe
Road circulating pump refills the online processing unit of close-coupled (1)；
(5) liquid in step (2) in the efficient scrubber tank of import (3) removes is gone outwards in step (3), and one is circulated in circulation fluid
After the section time, discharged via leakage fluid dram D1 or D2, while fresh fresh water, the high salt of exchange system clock are injected by fresh mouth of a river E
Water；
(6) draining described in step (5), water filling, each draining, water injection time are grasped according to live liquid level gauge liquid level
Make, carry out discharge opeing when liquid level reaches liquid level gauge height 1/4 to 1/2, discharge opeing is drained into above and below pot body closing end tangent position；
(7) gas phase that the efficient scrubber tank of import (3) carries out efficiently de- liquid is flowed into described in step (1), is efficiently washed through import
After gas tank (3) processing, gas phase flows into compressor, and the liquid portion of removing is used as circulation fluid in system by circulating mouth of a river C2 and followed
Ring, partly pass through leakage fluid dram D2 discharge systems；
(8) gas phase that the efficient scrubber tank of import (3) carries out efficiently de- liquid is flowed into described in step (7), is efficiently washed in import
Flowed successively through in gas tank (3)：Inertial separation distributor (3-4), micro- cyclone (3-3), fin separation module (3-1), fiber coagulates
Poly- module (3-2), the liquid carried secretly in natural gas is subjected to efficient removal；
(9) liquid removed described in step (8), the bottom of the efficient scrubber tank of import (3) is collected in through downspout (3-6)
Portion；
(10) unit that natural gas passes through successively described in step (8), inertial separation distributor (3-4) effectively realize gas-liquid
Separation and even gas distribution, micro- cyclone (3-3) couple point for realizing gas-liquid two-phase using eddy flow or centrifugal field with barometric gradient field
Interception separation is carried out to liquid using the form of multilayer fin stacking from, fin separation module (3-1), and by part fine droplet
Coalescence is grown up, and fibre deposition module (3-2) carries out the establishment of particular form by the different fiber of hydrophilic and hydrophobic, and drop is carried out
Cohesion, separation accuracy are 15 μm；
(11) gas phase of compressor is flowed into described in step (7), is entered and the efficient scrubber tank of import (3) phase after compressor
The efficient scrubber tank (5) in syntectonic outlet, by with after the efficient scrubber tank of import (3) identical flow, gas phase enters lower one stream
Journey, liquid phase part are used as circulation fluid circulation by circulating mouth of a river C2, partly discharged by leakage fluid dram D3, and discharge opeing flow is high with import
It is consistent to imitate scrubber tank (3).
The beneficial effects of the present invention are：
(1) Soluble salt ions are removed to tapping natural gas wash using the online processing unit of close-coupled (1), and it is pre- de-
Except most of moisture, pipeline scale, compressor impeller fouling caused by fundamentally solving soluble-salt precipitation cause bias
Phenomena such as vibrations, in natural gas more than 95% Soluble salt ions can be removed, and it is online efficient to more than 90% water progress
Removing.
(2) depth is carried out to air inlet using the efficient scrubber tank of import (3) and takes off liquid processing, gas is successively by level Four gas-liquid point
From device, the de- liquid of classification substep is realized, the liquid into therein more than 99% can be removed, be at utmost lowered into compressor
The band liquid measure of middle gas, the operation of compressor efficient stable is maintained, improves the compressor operation cycle.
(3) using efficient scrubber tank (5) is exported to the de- liquid processing of air inlet progress depth, gas is successively by level Four gas-liquid point
From device, the de- liquid of classification substep is realized, the liquid into therein more than 99% can be removed, avoid hydrate and acid solution
Generation, reduce the impact to devices such as subsequent pipeline, valves.
(4) compared with taking off liquid processing method before and after the existing compressor of platform, the processing method after improvement reduces device
Floor space 30%~60%, while improve and receive 3~5 times of liquid efficiency.
Brief description of the drawings
Fig. 1 is that scrubber tank takes off effluogram before and after existing compressor on platform；
Fig. 2 is offshore platform natural gas deep purification treatment method flow chart；
Fig. 3 is the online processing unit figure of close-coupled；
Fig. 4 is the efficient scrubber tank installation drawing of import and export；
Fig. 5 is the efficient scrubber tank I-I sectional views of import and export.
Symbol description：
The online processing unit of 1 close-coupled；2 pipe circle pumps；The efficient scrubber tank of 3 imports；
4 compressors；The 5 efficient scrubber tanks in outlet；
1-1 close-coupled bodys；1-2 spray washing units；The uniform unit of 1-3 umbrella gas-liquids；
1-4 natural gases, washings mixing mass transfer unit；1-5 makes rotation unit；
1-6 natural gases, washings separative element.
3-1 fin separation modules；3-2 fibre deposition modules；The micro- cyclones of 3-3；
3-4 inertial separation distributors；3-5 liquid level gauges；3-6 downspouts.
Embodiment
Below, the present invention is specifically described by embodiment.It is necessarily pointed out that following examples are only used
In the invention will be further described, it is impossible to be interpreted as limiting the scope of the invention, professional and technical personnel in the field
Some the nonessential modifications and adaptations made according to present disclosure, still fall within protection scope of the present invention.
Shown in Fig. 2, offshore platform natural gas deep purification treatment method, comprise the following steps：
(1) natural gas produced enters system by gas phase entrance A, after the online processing unit of close-coupled (1) processing, gas
Mutually flow into the efficient scrubber tank of import (3) and carry out efficiently de- liquid, the liquid of removing enters the efficient scrubber tank of import (3)；
(2) liquid in step (1) in the efficient scrubber tank of import (3) follows as circulation fluid from circulation mouth of a river C1 via pipeline
Ring pump (2) refills the online processing unit of close-coupled (1), in addition, after circulation fluid circulates a period of time, via leakage fluid dram
D1 or D2 discharges, while fresh fresh water, the haline water of exchange system clock, each draining, water injection time are injected by fresh mouth of a river E
Operated according to live liquid level gauge liquid level, discharge opeing, discharge opeing are carried out when liquid level reaches liquid level gauge height 1/4 to 1/2
Drain into above and below pot body closing end tangent position；
(3) gas phase that the efficient scrubber tank of import (3) carries out efficiently de- liquid is flowed into described in step (1), is efficiently washed through import
After gas tank (3) processing, gas phase flows into compressor (4)；
(4) gas phase of compressor is flowed into described in step (3), is handled through the efficient scrubber tank of the laggard inlet/outlet of compressor (5)；
(5) enter the gas phase of the efficient scrubber tank of inlet/outlet (5) described in step (4), handled through exporting efficient scrubber tank (5)
Afterwards, gas phase enters next step technological process by gaseous phase outlet B discharge systems, and the liquid portion of removing is made by circulating mouth of a river C2
Used for recirculated water, partly through leakage fluid dram D3 discharge systems, the situation that liquid level gauge on efficient scrubber tank (5) is exported by observing is sentenced
Liquid level in disconnected tank, discharge opeing is carried out when liquid level reaches liquid level gauge height 1/4 to 1/2, discharge opeing drains into pot body closing end
Above and below tangent position.
The above-mentioned online processing unit of close-coupled includes following several parts：Close-coupled body (1-1), spray washing unit
(1-2), the uniform unit of umbrella gas-liquid (1-3), natural gas, washings mixing mass transfer unit (1-4), rotation unit (1-5) is made, naturally
Gas, washings separative element (1-6).
The above-mentioned efficient scrubber tank of import (3) has identical inner member form with exporting efficient scrubber tank (5), comprising following
Several parts：Fin separation module (3-1), fibre deposition module (3-2), micro- cyclone (3-3), inertial separation distributor (3-
4), liquid level gauge (3-5), downspout (3-6).
The above-mentioned online processing unit of close-coupled (1) can remove in natural gas more than 95% Soluble salt ions, and right
More than 90% water carries out online efficient removal.
The above-mentioned efficient scrubber tank of import (3) can remove the liquid into therein more than 99% with the efficient scrubber tank (5) in outlet
Body.
Above-mentioned fin separation module (3-1) carries out interception separation to liquid using the form of multilayer fin stacking, and will
Part fine droplet coalescence is grown up；Described fibre deposition module (3-2) carries out specific shape by the different fiber of hydrophilic and hydrophobic
The establishment of formula, is condensed to drop, and separation accuracy is 15 μm；Described micro- cyclone (3-3) uses patent《Using eddy flow or
Centrifugal field couples the device for carrying out liquid degassing with barometric gradient field》Introduce in (B of CN 103071318) using eddy flow or from
Psychological field is coupled into the technology of promoting the circulation of qi liquid two-phase laminated flow with barometric gradient field；Described inertial separation distributor (3-4) uses patent
《Gas-liquid inertial separation is with distributed couplings unit and using its separator》The gas-liquid inertia introduced in (B of CN 102671502)
Distributor is separated, effectively realizes the function of gas-liquid separation and even gas distribution；Described liquid level gauge (3-5) can be set to liquid level on the spot
Meter or far transmission level meter, to observe the receipts liquid situation in high-efficient washing tank, are easy to be controlled the liquid level in high-efficient washing tank；
Described downspout (3-6) is more downspouts, and more downspouts connect micro- cyclone (3-3) underflow opening respectively, and connection is simultaneously
Through fin separation module (3-1), the bottom support plate of fibre deposition module (3-2), make by micro- cyclone (3-3), fin
Separation module (3-1), the liquid of fibre deposition module (3-2) separation can be collected into the bottom of efficient scrubber tank by downspout
Portion.
Embodiment 1
Present inventor by extensive and found after in-depth study, often tie by the compressor of offshore gas field
Dirt, it is eccentric increasingly severe with the getting worse of fouling because fouling is uneven with making compressor that bias occur, and then trigger
The strong vibrations of compressor, shut down compressor, have a strong impact on the normal production of offshore gas field platform.It is this through analysis
Phenomenon be due to mineral salt in the gas reservoir of underground under conditions of ground end HTHP, stratum water, this Saline Water can be dissolved in
Can be with natural gas co-localization in gas reservoir space.After gas reservoir development, natural gas constantly moves from hole to pit shaft, herein mistake
The concentrated water dissolved with mineral salt carries out ground by natural gas in journey.Liquid handling process is taken off before and after existing compressor such as
Fig. 1, de- liquid is carried out to the natural gas of exploitation only with import scrubber tank, sets cyclone to carry out de- liquid, portion in import scrubber tank
Branch sets wire mesh demister in tank deck, and this de- liquid efficiency of design is low, may result in free water and enters compression with natural gas
Machine, during multi-stage compression, gas temperature rise, moisture constantly evaporates under the high temperature conditions, with the reduction of moisture, dissolved with
The aqueous solution of mineral salt reaches hypersaturated state, and final mineral salt is separated out with crystalline solid, causes compressor impeller fouling.It is same in this
When, natural gas carrying liquid can also produce hydrate, form the strong sour gas of corrosivity, to the valve on conveying pipe, pipeline, instrument
Table etc. produces physical impact, influences the transport normally produced.Offshore platform natural gas deep purification treatment method is devised for this.
Washing and desalting is carried out to the natural gas of exploitation by the online processing unit of close-coupled, while removes most of water therein online,
Efficient liquid removing is carried out using the efficient scrubber tank of import, improves the service cycle of compressor, is entered using efficient scrubber tank is exported
Row efficient liquid removes, ensure subsequent process flow, pipeline, valve, instrument etc. will not because hydrate, corrosivity acid solution,
Salt ion separates out produces harmful effect to production and transport.
As shown in Fig. 2 it mainly includes：The online processing unit 1 of close-coupled；Pipe circle pump 2；The efficient scrubber tank 3 of import；
Compressor 4；Efficient scrubber tank 5 is exported, if Fig. 5 is the efficient scrubber tank I-I sectional views of import and export.For the efficient scrubbing of import and export
The appearance and size of tank and the design of inner member are special according to factors such as gas field actual production, real gas component, operating conditions
Door design.
As shown in figure 3, the online processing unit of close-coupled mainly includes：Close-coupled body 1-1；Spray washing unit 1-2；Umbrella
The uniform unit 1-3 of shape gas-liquid；Natural gas, washings mixing mass transfer unit 1-4；Make rotation unit 1-5；Natural gas, washings separation
Unit 1-6.
As shown in figure 4, the efficient scrubber tank of import and export mainly includes：Fin separation module 3-1；Fibre deposition module 3-2；
Micro- cyclone 3-3；Inertial separation distributor 3-4；Liquid level gauge 3-5；Downspout 3-6.
The part producing parameter in certain gas field is as follows：
The natural gas produced enters system by gas phase entrance A, and gas phase entrance A gas velocity scope is 2~40m/s.Through tight
After the online processing unit of formula of gathering (1) processing, gas phase flows into the efficient scrubber tank of import (3) and carries out efficiently de- liquid, and the liquid of removing enters
Enter the efficient scrubber tank of import (3) and be injected into natural gas again by spray washing unit through pipe circle pump (2) as circulation fluid
In.Discharge opeing is carried out in liquid level gauge height 1/2, drains into the stopping of head bend line position, while injects fresh fresh water, with exchange system
In haline water.The less salt natural gas treated through the online processing unit of close-coupled (1) enters the efficient scrubber tank of import (3), gas
Compressor is mutually flowed into, liquid collects in the bottom of the efficient scrubber tank of import (3) through downspout (3-6), partly by circulating the mouth of a river
C1 circulates as circulation fluid in system, partly by leakage fluid dram D2 discharge systems, judges import by observing liquid level gauge (4-5)
The height of liquid level in efficient scrubber tank (3), discharge opeing is carried out when liquid level gauge height 1/4 to 1/2 is highly reached, passes through leakage fluid dram
D2 carries out discharge opeing, and discharge opeing stops when draining into above and below pot body closing end tangent position.It is efficient that natural gas after compressor enters inlet/outlet
Scrubber tank (5) carries out deep dehydration processing, and gas phase enters next step technological process, and liquid collects in outlet through downspout and efficiently washed
The bottom of gas tank (5), partly it is used as circulation fluid in system by circulating mouth of a river C1 and circulates, partly pass through leakage fluid dram D3 discharges system
System, judge to export the height of liquid level in efficient scrubber tank (5) by observing liquid level gauge, arrived when highly reaching liquid level gauge height 1/4
Discharge opeing is carried out when 1/2, discharge opeing is carried out by leakage fluid dram D3, discharge opeing stops when draining into above and below pot body closing end tangent position.
When carrying out advanced treating purification to offshore platform natural gas using this method, compressor stable operation is not sent out for 1 year
Raw scale formation, follow-up pipeline, valve, instrument do not occur due to soluble-salt precipitation, formation hydrate, form severe corrosive
Physical destruction caused by acid solution.
Compared with former processing method, the processing method after improvement reduces the floor space 30%~60% of device, simultaneously
Improve and receive 3~5 times of liquid efficiency.
Claims (6)
1. offshore platform natural gas deep purification treatment method, it is characterised in that comprise the following steps：
(1) natural gas produced enters system by gas phase entrance A, after the online processing unit of close-coupled (1) processing, gas phase stream
Enter the efficient scrubber tank of import (3) and carry out efficiently de- liquid, the liquid of removing enters the efficient scrubber tank of import (3)；
(2) liquid in step (1) in the efficient scrubber tank of import (3) as circulation fluid from circulation mouth of a river C1 via pipe circle pump
(2) refill the online processing unit of close-coupled (1), in addition, after circulation fluid circulates a period of time, via leakage fluid dram D1 or
D2 is discharged, while injects fresh fresh water by fresh mouth of a river E, the haline water of exchange system clock, each draining, water injection time according to
Live liquid level gauge liquid level is operated, and carries out discharge opeing when liquid level reaches liquid level gauge height 1/4 to 1/2, discharge opeing drains into
Above and below pot body closing end tangent position；
(3) gas phase that the efficient scrubber tank of import (3) carries out efficiently de- liquid is flowed into described in step (1), through the efficient scrubber tank of import
(3) after handling, gas phase flows into compressor (4)；
(4) gas phase of compressor is flowed into described in step (3), is handled through the efficient scrubber tank of the laggard inlet/outlet of compressor (5)；
(5) gas phase of the efficient scrubber tank of inlet/outlet (5) is entered described in step (4), after exporting efficient scrubber tank (5) processing, gas
Next step technological process is mutually entered by gaseous phase outlet B discharge systems, the liquid portion of removing, which is used as by circulating mouth of a river C2, to follow
Ring water uses, and partly through leakage fluid dram D3 discharge systems, the situation that liquid level gauge on efficient scrubber tank (5) is exported by observing judges tank
Interior liquid level, discharge opeing is carried out when liquid level reaches liquid level gauge height 1/4 to 1/2, discharge opeing drains into pot body closing end tangent line
Above and below position.
2. according to the method for claim 1, it is characterised in that gas phase entrance A gas velocity scope is 2~40m/s.
3. according to the method for claim 1, it is characterised in that the online processing unit of close-coupled includes following several portions
Point：Close-coupled body (1-1), spray washing unit (1-2), the uniform unit of umbrella gas-liquid (1-3), natural gas, washings mixing
Mass transfer unit (1-4), make rotation unit (1-5), natural gas, washings separative element (1-6).
4. according to the method for claim 1, it is characterised in that the efficient scrubber tank of import (3) is with exporting efficient scrubbing
Tank (5) has identical inner member form, includes following components：Fin separation module (3-1), fibre deposition module (3-
2), micro- cyclone (3-3), inertial separation distributor (3-4), liquid level gauge (3-5), downspout (3-6).
5. according to the method for claim 1, it is characterised in that the online processing unit of close-coupled (1) can remove naturally
More than 95% Soluble salt ions in gas, and online efficient removal is carried out to more than 90% water.
6. according to the method for claim 1, it is characterised in that the efficient scrubber tank of import (3) is with exporting efficient scrubbing
Tank (5) can remove the liquid into therein more than 99%.
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| CN201710662059.0A CN107365607B (en) | 2017-08-04 | 2017-08-04 | Compact natural gas pretreatment purification method suitable for offshore platform |
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| CN201710662059.0A CN107365607B (en) | 2017-08-04 | 2017-08-04 | Compact natural gas pretreatment purification method suitable for offshore platform |
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| CN107365607B CN107365607B (en) | 2023-04-18 |
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| CN108609794A (en) * | 2018-06-29 | 2018-10-02 | 上海米素环保科技有限公司 | A kind of rich solution degassing deoiling method and its device |
| CN114504882A (en) * | 2022-03-14 | 2022-05-17 | 四川轻化工大学 | Multi-effect step synergistic gas-liquid separation method and device |
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| CN102620524A (en) * | 2012-04-16 | 2012-08-01 | 上海交通大学 | Cascade type natural gas pressurized liquefaction process with sublimation removal of CO2 |
| CN104667683A (en) * | 2013-11-29 | 2015-06-03 | 华东理工大学 | Graded purification device and graded purification method for dusty gas |
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| CN102620524A (en) * | 2012-04-16 | 2012-08-01 | 上海交通大学 | Cascade type natural gas pressurized liquefaction process with sublimation removal of CO2 |
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| CN107365607B (en) | 2023-04-18 |
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