CN101678259A - Method and device for removing contaminants from a contaminated gas stream - Google Patents

Method and device for removing contaminants from a contaminated gas stream Download PDF

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Publication number
CN101678259A
CN101678259A CN200880021177A CN200880021177A CN101678259A CN 101678259 A CN101678259 A CN 101678259A CN 200880021177 A CN200880021177 A CN 200880021177A CN 200880021177 A CN200880021177 A CN 200880021177A CN 101678259 A CN101678259 A CN 101678259A
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China
Prior art keywords
run
pollutant
conduit
section
pipeline section
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CN200880021177A
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Chinese (zh)
Inventor
H·C·哈姆里
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Shell Internationale Research Maatschappij BV
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Shell Internationale Research Maatschappij BV
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Publication of CN101678259A publication Critical patent/CN101678259A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
    • B04C3/04—Multiple arrangement thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/10—Venturi scrubbers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/12—Washers with plural different washing sections
    • 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
    • B01D50/40—Combinations of devices covered by groups B01D45/00 and B01D47/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1406—Multiple stage absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456—Removing acid components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/263—Drying gases or vapours by absorption
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/304—Hydrogen sulfide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/80—Water
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Gas Separation By Absorption (AREA)
  • Cyclones (AREA)

Abstract

A method for removing contaminants, such as water, CO2 and/or H2S, from a contaminated gas stream comprises inducing the gas stream to flow through a conduit (10) having a first and a second conduit section (11,12) and optionally further conduit sections (13-15), which each comprise : a) a cyclonic fluid separation section (11A-15A) in which the gas stream is induced to swirl such that contaminants ( 11B-15B) flow to an outer region of the separation section and a purified gas fraction (11C-15C) flows into a central region of the separation section; b) a central purified gas outlet tube (11D-15D) for discharging the purified gas fraction; c) an outer discharge tube (11E-15E) for discharging the contaminants; and d) a venturi section (11F-15F)in which the gas stream is accelerated and the static pressure is reduced; wherein the method further comprises: connecting the central purified gas outlet tube (12D) of the second conduit section (12) to the venturi section (HF) of the first conduit section (11) such that a purified gas fraction is induced to flow from the second conduit section (12) into the first conduit section (11); injecting a contaminants absorbent (18, lean MEG) into the venturi section (HF) of the first conduit section (11); and inducing a contaminants and contaminant absorbent enriched fluid fraction to flow via a MEG recycling conduit (19) from the outer discharge tube (HE) of the first conduit section into the venturi section (12F) of the second conduit section (12) and optionally inducing a contaminants and contaminant absorbent enriched fluid fraction to flow via further MEG recycling conduits (20,21 and 22) from the outer discharge tubes (12E-14E) of the second, third and fourth conduit sections into the venturi section (13F-15F) of the third, fourthand fifth conduit section (13-15), respectively.

Description

Be used for removing the method for pollutant from contaminated gas stream
Technical field
The present invention relates to be used for for example pollute the method that natural gas or air logistics remove pollutant from contaminated gas stream.
Background technology
Known several different methods is used for removing pollution components for example water, hydrate, carbon dioxide and/or hydrogen sulfide from natural gas stream.
Described method can be based on physics and/or chemical separation technology.
Physical Separation Technology is utilized difference one or more in these components of selectively removing in fractionating column of boiling point, condensation point and/or the freezing point of multiple pollution components, perhaps utilizes the difference of density to separate in centrifugal or cyclone separator and has the component of different densities.
Chemical technology can utilize selectivity to absorb or catalytic reaction, can segregative component so that pollution components is changed into.
Being used for from the standard technique that natural gas removes hydrogen sulfide and carbon dioxide is that amine is handled, and it absorbs based on solvent.In the method, pollution components is bonded to molecule in the aqueous solution for example on the diethanol amine.The cleaning hydrocarbon gas is not absorbed and appears in the product gas logistics.Contain the solution that is absorbed pollutant circulate and be heated to about 100 ℃ to discharge gas, described gas is collected in the waste stream subsequently.Prime cost factor in this method is the energy requirement, solvent loss and the waste gas that are used for waste gas regeneration needs compression for example refilling near the fact of regenerating under the atmospheric pressure-any method.
The running cost that is used for any gas purification method must be the relatively little part that the clean air of generation is worth.If gas stream contains a large amount of pollutants, then the amine device will dispose but quite big, costliness and uneconomic because of their large-area solution-air contacts.
Known gas separation centrifuges only has the gaseous fraction of minute differences in about 50,000 rev/mins (RPM) rotation down with partition density.These fast rotational centrifuges are called ultracentrifuge and have limited separative efficiency, and only can handle limited gas flux.Remain to carry out purifying by centrifuge if contain the atmospheric logistics of a large amount of pollutants, then need a large amount of centrifuges or ultracentrifuge, this makes centrifugation uneconomical.
International Patent Application WO 2006087332 disclose a kind of from contaminated gas stream the method for separating contaminants, wherein contaminated gas stream is cooled in nozzle or expansion turbine and makes the temperature of at least some pollutant condensations and the mixture of cooling is separated into purified gas stream and is rich in the side-stream of pollutant in the slot type centrifuge.
European patent 1017465,1438540 and 1140363 discloses and has been used for purifying contaminated gas stream cyclone separator, wherein gas stream quickens in nozzle and cools off by nozzle, make at least some pollutant condensations, in fluid segregation section, form eddy current with the gas-liquid mixture that makes cooling, make liquid component longshore current body segregation section outer surface eddy current enter in the ring-type liquid outlet and purified gas stream flows in the purified gases delivery channel of center.
Even the purpose of this invention is to provide a kind of method that under gas contains the condition of a large amount of pollutants, also can from gas stream, remove solid, liquid and/or gaseous contaminant (for example water, hydrate, carbon dioxide and/or hydrogen sulfide) in effective and economic mode.
Summary of the invention
According to the present invention, a kind of method that is used for removing from contaminated gas stream pollutant is provided, described method comprises the conduit that gas stream is flowed through have first and second runs, described run comprises separately with lower member:
A) cyclonic fluid separation sections wherein makes gas stream form eddy current, makes the fluid distillate flow that is rich in solid and/or liquid pollutant to the perimeter and the poor gas fraction that contains pollutant of segregation section flow in the central area of segregation section;
B) center purified gases outlet is used for discharging the poor gas fraction that contains pollutant from the central area of centrifugal fluid segregation section;
C) outside discharge pipe is used for discharging the fluid cut that is rich in pollutant from the perimeter of segregation section; With
D) venturi pipeline section, it is positioned at the upstream of centrifugal fluid segregation section and makes gas stream in the axial velocity current downflow higher than centrifugal fluid segregation section at the venturi pipeline section;
Wherein said method also comprises:
-the center purified gases outlet of second run is connected to the venturi pipeline section of first run, thus the purified gases cut is flow to first run from second run;
-the liquid pollutant absorbent is injected the venturi pipeline section of first run; With
-the outside discharge pipe of first run is connected to the venturi pipeline section of second run, thus the fluid cut that is rich in pollutant and liquid pollutant absorbent is flow to the venturi pipeline section of second run from the outside discharge pipe of first run.
Should understand, the acceleration of fluid velocity will cause near the reduction of the static fluid pressure of static fluid pressure, particularly this venturi pipeline section trunnion in the venturi pipeline section of second run, make the separation in the outside discharge pipe of first run liquid and flow through between the fluid of Venturi tube of second run and produce positive differential pressure, thereby under the condition of pump action, the liquid that makes separation flow to the Venturi tube of second run from the outside discharge pipe of first run.
Described conduit can also comprise the 3rd run, described the 3rd run also comprise parts a), b), c) and d), wherein said method also comprises:
-the center purified gases outlet of the 3rd run is connected to the venturi pipeline section of second run, thus the purified gases cut is flow to second run from the 3rd run; With
-the outside discharge pipe of second run is connected to the venturi pipeline section of the 3rd run, thus the fluid cut that is rich in pollutant and liquid pollutant absorbent is flow to the venturi pipeline section of the 3rd run from the outside discharge pipe of second run.
Randomly, described conduit can comprise n run sequence, and wherein n is 4-40, described run comprise separately described in claim 1 parts a), b), c) and d) and wherein said method also comprise:
-the center purified gases outlet of n run is connected to the venturi pipeline section of (n-1) individual run, thus the purified gases cut is flow to (n-1) individual run from n run; With
-the outside discharge pipe of (n-1) individual run is connected to the venturi pipeline section of n run, thus the fluid cut that is rich in pollutant and liquid pollutant absorbent is flow to the venturi pipeline section of n run from the outside discharge pipe of (n-1) individual run.
The liquid pollutant absorbent can comprise monoethylene glycol (MEG), amines or aqueous amine compound solution and/or other absorbent fluid and be designed for absorb water, hydrogen sulfide, carbon dioxide and/or other pollutant from contaminated gas stream arbitrarily.
Conduit can level or vertically is positioned near the wellhead assembly of gas recovery well under water water bottom, with the part that can form gas disposal under water and regulate facility, described conduit from least one gas stream that receives contaminated gas stream and the near small part purifying of described conduit under water at least one wellhead assembly of gas recovery well enter in the downstream facility or enter length may seabed gas delivery conduit greater than 100 kms in.As an alternative, conduit can be positioned on the offshore gas platform or form the part of land gas production and treatment facility.
According to the present invention, the purified gas stream that is provided for from contaminated gas stream, removing the system of pollutant in addition and therefrom removes pollutant by the inventive method.
These and other feature, embodiment and the advantage of method and system of the present invention is described in claims, summary and wherein with reference in the following detailed description of the preferred embodiments of appended accompanying drawing.
The specific embodiment
Fig. 1 is the schematic longitudinal sectional drawing of conduit, and wherein contaminated gas stream is carried out purifying according to the inventive method; With
Fig. 2 is the schematic longitudinal sectional drawing of the alternate embodiment of the conduit that shows among Fig. 1, and wherein run directly is not connected to each other, but is connected to each other by pipeline.
The specific embodiment
Fig. 1 has shown conduit 10, and it comprises other the first, second, third, fourth and the 5th run 11,12,13,14 and 15 of branch, and described conduit 10 is connected between dusty gas entry conductor 16 and the purifying dry gas delivery channel 17.
Run 11-15 comprises separately with lower member:
A) cyclonic fluid separation sections 11A-15A, wherein make gas stream form eddy current by the blade 11G-15G that eddy current is provided, thereby the perimeter and the poor gas fraction 11C-15C that contains pollutant that make the fluid cut 11B-15B that is rich in solid and/or liquid pollutant flow to segregation section 11A-15A flow in the central area of segregation section 11A-15A;
B) center purified gases outlet 11D-15D is used for discharging the poor gas fraction that contains pollutant from the central area of centrifugal fluid segregation section 11A-15A;
C) outside discharge pipe 11E-15E is used for discharging the fluid cut that is rich in pollutant from the perimeter of segregation section 11A-15A; With
D) venturi pipeline section 11F-15F, it is positioned at centrifugal fluid segregation section 11A-15A upstream, with in venturi pipeline section 11F-15F, make gas stream higher axial velocity current downflow in than centrifugal fluid segregation section 11A-15A, the static pressure that make to quicken near the acceleration gas stream the trunnion of static pressure, particularly venturi pipeline section 11F-15F of gas stream reduces.
In embodiments shown, each run 11-15 also comprises optional static fluid blender 11H-15H, described static fluid blender 11H-15H is arranged in venturi pipeline section 11F-15F and provides between the blade 11G-15G of eddy current and anti-eddy current flow dynamic(al) correction blade 11K-15K is arranged among the purified gases outlet 11D-15D of center.
According to the present invention:
The center purified gases outlet 12D of-the second run 12 directly (as shown in fig. 1) or indirectly (for example by as shown in Figure 2 U type tube connector 32) be connected to the venturi pipeline section 11F of first run, thereby purified gases cut 12C is flow to first run 11 from second run 12;
-with the venturi pipeline section 11F of liquid pollutant absorbent (for example poor MEG) by poor absorbent feed line 18 injections first run 11; With
-the outside discharge pipe 11E of first run 11 is connected to the venturi pipeline section 12F of second run 12, thus the fluid cut 19 that is rich in pollutant and pollutant absorbent is flow to the venturi pipeline section 12F of second run 12 from the outside discharge pipe 11E of first run 11.
In addition:
-the outside discharge pipe 12E of second run 12 is connected to the venturi pipeline section 13F of the 3rd run 13, thus the fluid cut 20 that is rich in pollutant and liquid pollutant absorbent is flow to the venturi pipeline section 13F of the 3rd run 13 from the outside discharge pipe 12E of second run 12;
-the outside discharge pipe 13E of the 3rd run 13 is connected to the venturi pipeline section 14F of the 4th run 14, thus the fluid cut 21 that is rich in pollutant and liquid pollutant absorbent is flow to the venturi pipeline section 14F of the 4th run 14 from the outside discharge pipe 13E of the 3rd run 13;
-the outside discharge pipe 14E of the 4th run 14 is connected to the venturi pipeline section 15F of the 5th run 15, thus the fluid cut 22 that is rich in pollutant and liquid pollutant absorbent is flow to the venturi pipeline section 15F of the 5th run 15 from the outside discharge pipe 14E of the 4th run 14; With
-the outside discharge pipe 15E of the 5th run 15 is connected to the MEG delivery channel 23 that is rich in pollutant, the MEG fluid stream that is rich in pollutant discharges and flow to MEG purification devices 24 by the MEG delivery channel 23 that is rich in pollutant from conduit 10, the MEG fluid stream that will be rich in pollutant in MEG purification devices 24 is separated into fluid cut 25 and the poor poor MEG cut 26 that contains pollutant that is rich in pollutant and the poor MEG of containing, and the poor poor MEG cut 26 that contains pollutant is circulated in the poor MEG feed line 18.
To be MEG be supplied among the venturi pipeline section 11F of first run 11 that conduit 10 enters downstream by independent poor MEG feed line 18 advantage of the inventive method, with subsequently because compare static pressure in the trunnion of each venturi pipeline section 12F-15F of the section 12-15 of upstream more with the static pressure among the wideer outside discharge pipe 11E-14E of tract relative low and be circulated to automatically among the run 12-15 of upstream more.
Fig. 2 has shown the alternate embodiment of conduit of the present invention, wherein conduit comprises 4 run 11-14, the run 11-14 that shows among described run 11-14 and Fig. 1 is similar, wherein use the similar parts of similar Reference numeral mark, but wherein run 11-14 is in line and directly is not connected to each other, but the pipe 30 by U type or other shape, 31 and 32 are connected to each other, wherein will add in the absorbent purification devices (not shown) by the liquid-absorbant that is rich in pollutant that the 4th run 14 is discharged, with poor absorbent from described absorbent purification devices is pumped into first section venturi pipeline section 11F.
The outside discharge pipe 11E of first run 11 is connected to the venturi pipeline section 12F of second run 12, thereby the fluid cut 19 that is rich in pollutant and pollutant absorbent is inhaled into the venturi pipeline section 12F of second run 12 from the outside discharge pipe 11E of first run 11.
The outside discharge pipe 12E of second run 12 is connected to the venturi pipeline section 13F of the 3rd run 13, thereby the fluid cut 20 that is rich in pollutant and pollutant absorbent is inhaled into the venturi pipeline section 13F of the 3rd run 13 from the outside discharge pipe 12E of second run 12.
The outside discharge pipe 13E of the 3rd run 13 is connected to the venturi pipeline section 14F of the 4th run 14, thereby the fluid cut 21 that is rich in pollutant and pollutant absorbent is inhaled into the venturi pipeline section 14F of the 4th run 14 from the outside discharge pipe 13E of the 3rd run 13.
Should be understood that the absorbent circulatory system of the present invention can operate under the condition of circulating pump between the run, this has strengthened the reliability of circulation, because circulating pump is easy to wearing and tearing and needs periodic maintenance, inspection and replacing.
Should understand, comprise at conduit under the situation of n run, contaminated gas stream will at first enter n run, purified gas stream from n run will enter (n-1) individual run subsequently, gas stream from (n-1) individual run will enter (n-2) individual run subsequently, or the like.Finally, will leave whole conduit from the purified gas stream of first run.
Cyclonic fluid separation sections of the present invention is particularly separated in the pipeline.Gas stream flows through the pipeline type conduit, and described conduit is furnished with above-mentioned inner member.Therefore, do not have the tangent line of gas stream to flow into, tangent line flows and is caused by specific inner member such as blade and swirler.
Contaminated gas stream of the present invention is natural gas stream preferably, compatibly comprises the methane of 50vol% at least, and it is polluted by water, carbon dioxide, hydrogen sulfide and/or mercaptan.

Claims (12)

1. method that is used for removing from contaminated gas stream pollutant, described method comprise the conduit that gas stream is flowed through have first and second runs, and described run comprises following assembly separately:
A) cyclonic fluid separation sections wherein makes gas stream form eddy current, makes the fluid distillate flow that is rich in solid and/or liquid pollutant to the perimeter and the poor gas fraction that contains pollutant of segregation section flow in the central area of segregation section;
B) center purified gases outlet is used for discharging the poor gas fraction that contains pollutant from the central area of centrifugal fluid segregation section;
C) outside discharge pipe is used for discharging the fluid cut that is rich in pollutant from the perimeter of segregation section; With
D) venturi pipeline section, it is positioned at the upstream of centrifugal fluid segregation section and makes gas stream in the axial velocity current downflow higher than centrifugal fluid segregation section at the venturi pipeline section;
Wherein said method also comprises:
-the center purified gases outlet of second run is connected to the venturi pipeline section of first run, thus the purified gases cut is flow to first run from second run;
-the liquid pollutant absorbent is injected the venturi pipeline section of first run; With
-the outside discharge pipe of first run is connected to the venturi pipeline section of second run, thus the fluid cut that is rich in pollutant and liquid pollutant absorbent is flow to the venturi pipeline section of second run from the outside discharge pipe of first run.
2. the process of claim 1 wherein that described conduit also comprises the 3rd run, described the 3rd run also comprise described in claim 1 parts a), b), c) and d) and wherein said method also comprise:
-the center purified gases outlet of the 3rd run is connected to the venturi pipeline section of second run, thus the purified gases cut is flow to second run from the 3rd run; With
-the outside discharge pipe of second run is connected to the venturi pipeline section of the 3rd run, thus the fluid cut that is rich in pollutant and liquid pollutant absorbent is flow to the venturi pipeline section of the 3rd run from the outside discharge pipe of second run.
3. the method for claim 2, wherein said conduit comprises n run sequence, wherein n is 4-40, described run comprise separately described in claim 1 parts a), b), c) and d) and wherein said method also comprise:
-the center purified gases outlet of n run is connected to the venturi pipeline section of (n-1) individual run, thus the purified gases cut is flow to (n-1) individual run from n run; With
-the outside discharge pipe of (n-1) individual run is connected to the venturi pipeline section of n run, thus the fluid cut that is rich in pollutant and liquid pollutant absorbent is flow to the venturi pipeline section of n run from the outside discharge pipe of (n-1) individual run.
4. each method of claim 1-3 wherein designs the liquid pollutant absorbent to absorb water, hydrogen sulfide, carbon dioxide and/or other pollutant from contaminated gas stream.
5. the method for claim 4, wherein said liquid pollutant absorbent comprises monoethylene glycol (MEG) and/or amines and/or other absorbent that is used to absorb one or more pollutants.
6. each method of claim 1-4, wherein said conduit has the orientation of basic horizontal, or wherein said conduit has vertical substantially orientation.
7. each method of claim 1-6, wherein said conduit is positioned near the water bottom of wellhead assembly of gas recovery well under water, the part that preferred wherein said conduit forms gas disposal under water and regulates facility, described conduit enters in the gas delivery conduit of seabed from the gas stream that at least one receives contaminated gas stream and the near small part purifying of described conduit under water at least one wellhead assembly of gas recovery well.
8. each method of claim 1-6, wherein said conduit is positioned on the offshore gas platform.
9. each method of claim 1-6, wherein said conduit forms the part of land gas production and treatment facility.
10. system that is used for removing pollutant from contaminated gas stream, described system comprises the conduit that is used to carry contaminated gas stream, and described conduit comprises first and second runs, and described run comprises separately with lower member:
A) centrifugal fluid segregation section, it comprises the blade that eddy current is provided, thereby described blade makes gas stream form eddy current the fluid distillate flow that is rich in solid and/or liquid pollutant to the perimeter and the poor gas fraction that contains pollutant of segregation section is flow in the central area of segregation section;
B) center purified gases outlet is used for discharging the poor gas fraction that contains pollutant from the central area of centrifugal fluid segregation section;
C) outside discharge pipe is used for discharging the fluid cut that is rich in pollutant from the perimeter of segregation section; With
D) venturi pipeline section, it is positioned at the upstream of centrifugal fluid segregation section and makes gas stream in the axial velocity current downflow higher than centrifugal fluid segregation section at the venturi pipeline section;
-guide coupling, its center purified gases outlet with second run links to each other with the venturi pipeline section of first run, thereby the purified gases cut is flow to first run from second run;
-pollutant absorbent feed line, it is connected to the venturi pipeline section of first run; With
-pollutant absorbent circulation conduit, its outside discharge pipe with first run links to each other with the venturi pipeline section of second run, and the fluid cut that in use is rich in pollutant and pollutant absorbent flow to the venturi pipeline section of second run by the outside discharge pipe of described pollutant absorbent circulation conduit from first run.
11. the system of claim 10, wherein said guide coupling comprises U type or other cast.
12. a purified gas stream, it has therefrom removed pollutant by each method of claim 1-9.
CN200880021177A 2007-05-15 2008-05-15 Method and device for removing contaminants from a contaminated gas stream Pending CN101678259A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP07108272 2007-05-15
EP07108272.1 2007-05-15
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AU2008356150A8 (en) 2010-07-15
EP2152383A1 (en) 2010-02-17
WO2009140993A1 (en) 2009-11-26
AU2008356150A1 (en) 2010-06-24
EA200901528A1 (en) 2010-04-30
CA2686992A1 (en) 2009-11-26

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