CN109370670A - The process system of carbon dioxide in natural, moisture and heavy hydrocarbon is removed simultaneously - Google Patents
The process system of carbon dioxide in natural, moisture and heavy hydrocarbon is removed simultaneously Download PDFInfo
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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
- C10L3/106—Removal of contaminants of water
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- 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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
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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
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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
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/104—Carbon dioxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/104—Alumina
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/403—Further details for adsorption processes and devices using three beds
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- 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
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
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Abstract
The process system of carbon dioxide in natural, moisture and heavy hydrocarbon is removed simultaneously.Traditional dry method pretreating process is simple, is not suitable for the pretreatment of high carbon dioxide content, wet processing is complicated, and hydramine reagent is toxic, needs regular replenishment solution and desalted water.Present invention composition includes: adsorption tower I(1), adsorption tower II(2), adsorption tower III(3), purified natural gas pipe passes through valve I(10) it is connected with cold blowing inlet tube, cold blowing outlet is connected with cold blowing Gas Cooler (9) inlet tube, cold blowing Gas Cooler outlet is connected with cold blowing gas supercharger (8) inlet tube, cold blowing gas supercharger outlet is connect with cold blowing inlet tube and purification tracheae respectively, adsorption tower I, adsorption tower II, there is outlet in the middle part of adsorption tower III, outlet stove pipe is connect by valve with storage heater (4) inlet tube, accumulator outlet pipe is connect with heating gas supercharger (5) inlet tube.The present invention is used for while removing the process system of carbon dioxide in natural, moisture and heavy hydrocarbon.
Description
Technical field:
The present invention relates to the natural gas preconditioning technique fields in liquefaction Technology of Natural Gas, and in particular to a kind of to remove simultaneously naturally
The process system and method for carbon dioxide, moisture and heavy hydrocarbon in gas.
Background technique:
Natural gas is a kind of environmentally protective, economical and practical, safe and reliable high-grade energy, develops gas industry, natural gas liquid
The research of gas purifying process is also particularly important in change technology, because in natural gas relatively high-solidification point component such as carbon dioxide,
Moisture and heavy hydrocarbon etc. can solidify in gas deliquescence process and occluding device, it is necessary to be removed before liquefaction；Traditional
Preprocess method is the sour gas+molecular sieve such as hydramine method carbon dioxide removal and hydrogen sulfide and active carbon multiple-hearth adsorbing and removing
Moisture and heavy hydrocarbon, for thering is larger demand for fuel such as to use gas turbine drives compressor or fuel gas generation or having downstream pipe network
LNG factory, when carbon dioxide content is lower in unstripped gas, dry method pretreating process is can also be used in usually less than 1% when, that is, is divided
Son sieve removes moisture, heavy hydrocarbon and carbon dioxide with the absorption of active carbon multiple-hearth simultaneously, a small amount of regeneration gas (account for processing tolerance 7 ~
15%) for generating electricity or going downstream pipe network；When carbon dioxide content is higher, due to regenerating the larger need for having exceeded power generation of tolerance
It asks, extra carbon containing regeneration gas can not be recycled due to that cannot isolate carbon dioxide by cooling method, can only enter torch
Emptying causes to waste；Although therefore traditional dry method pretreating process process simple operations facilitate investment small, be not suitable for height
The natural gas of carbon dioxide content pre-processes；Traditional wet processing can only be used；And wet process natural gas pretreating process, stream
Journey is complicated, and equipment is various, and investment is big, and hydramine reagent is toxic, and regular replenishment solution and desalted water are needed in operation.
Summary of the invention:
The object of the present invention is to provide a kind of process for removing carbon dioxide in natural, moisture and heavy hydrocarbon simultaneously, streams
Journey is simple, strong applicability, and technique removes natural gas using three tower temp.-changing adsorptions (TSA) and heating gas supercharger serial flow simultaneously
Middle carbon dioxide gas or other impurities.
Above-mentioned purpose is realized by following technical scheme:
Process system that is a kind of while removing carbon dioxide in natural, moisture and heavy hydrocarbon, composition include: adsorption tower I, absorption
Tower II, adsorption tower III, it is characterized in that: the inlet tube of the adsorption tower I, the adsorption tower II, the adsorption tower III
It is connect by valve with unstripped gas entrance, the outlet of the adsorption tower I, the adsorption tower II, the adsorption tower III
It is connect by valve with purification tracheae, the purified natural gas pipe is connected by valve I with cold blowing inlet tube, the cold blowing
Outlet is connected with cold blowing Gas Cooler inlet tube, the cold blowing Gas Cooler outlet and cold blowing gas supercharger inlet tube phase
Even, the cold blowing gas supercharger outlet is connect with the cold blowing inlet tube and the purification tracheae respectively, described
Adsorption tower I, the adsorption tower II, the middle part adsorption tower III have outlet, and the outlet stove pipe passes through valve
It is connect with storage heater inlet tube, the accumulator outlet pipe is connect with heating gas supercharger inlet tube, and the heating gas increases
Press outlet is connected with heater inlet pipe.
The process system of carbon dioxide in natural, moisture and heavy hydrocarbon, the adsorption tower I, institute are removed while described
Adsorption tower II, the adsorption tower III outlet at bottom pipe stated are connected by valve with heating Gas Cooler inlet tube, described
Heating Gas Cooler outlet is connect with fuel gas pipe.
The process system of carbon dioxide in natural, moisture and heavy hydrocarbon, the storage heater import are removed while described
Pipe is connect with cold blowing Gas Cooler inlet tube by valve II, and the cold blowing Gas Cooler outlet and cold blowing gas supercharger connect
It connects.
The process system of carbon dioxide in natural, moisture and heavy hydrocarbon, the adsorption tower I, institute are removed while described
Adsorption tower II, the adsorption tower III stated points are two-section batch, and lower end bed fills molecule for removing moisture and heavy hydrocarbon
Sieve is combined with active carbon compounded mix, molecular sieve with silica gel compounded mix or molecular sieve with activated alumina compounded mix, upper end
Bed is used for carbon dioxide removal, fills 13X molecular sieve, every adsorption tower can also be according to circumstances divided into two concatenated suctions
Attached tower, First tower remove moisture and heavy hydrocarbon, second tower carbon dioxide removal.
The process system of carbon dioxide in natural, moisture and heavy hydrocarbon, the method for the process system are removed while described
Include the following steps:
The source of unstripped gas is suitable for various natural gases first, is removed using three tower temp.-changing adsorptions and circularly-supercharged machine serial flow
Moisture, heavy hydrocarbon and carbon dioxide impurities in natural gas；
Using three tower temp.-changing adsorptions and circularly-supercharged machine serial flow, when adsorption tower I is in adsorbed state, adsorption tower II is in cold
When blowing state, adsorption tower III is in heated condition, and the starting circularly-supercharged machine of cold blowing gas carries out circulating cooling to adsorption tower II, follows
Ring cooling procedure reduces and with temperature due to being led to the supplement fuel gas bring pressure reduction of stove pipe road by purified gas
Valve I supplement is crossed to maintain pressure；Cold blowing gas can be cancelled when cold blowing tolerance is calculated less than or equal to purified gas flow to follow
Ring supercharger, whole purified gas, which are used as after cold blowing gas, returns to purification feed channel from the outlet of cold blowing Gas Cooler, thus simple flow；
The starting of gas supercharger is heated by the natural gas adsorption circulating-heating in adsorption tower III upper section and storage heater, heater, another part
Heating gas enters heating Gas Cooler cooling after flowing through adsorption tower lower section thermal dehydration and de- heavy hydrocarbon bed from adsorption tower upper section, it
Downstream pipe network is sent out or entered as fuel afterwards；This part heating gas is supplemented by valve II in pipeline.Due to the company of these gases
Continuous supplement, carbon dioxide of the adsorption tower upper section in heat gas during circulating-heating are able to gradually dilute and reach purification
It is required that；Adsorption cycle switches over after reaching, adsorption tower I heating, adsorption tower II absorption, and adsorption tower III cold blowing is recycled.
The utility model has the advantages that
1. of the invention be mainly to provide process system and side a kind of while that remove carbon dioxide in natural, moisture and heavy hydrocarbon
Method, suitable for self power generation or have downstream gas distributing system and middle-size and small-size natural gas liquefaction plant, solve conventional wet decarburization+
The de- heavy hydrocarbon process flow of dry method dehydration is complicated, plant investment is big, takes up a large area, needs the disadvantages of desalted water, while also solving
Fuel gas demand, the problem that regeneration gas can not be dissolved all are greater than using common dry method pretreating process regeneration gas.
The present invention is provided with storage heater before heating gas supercharger, on the one hand lowers heating energy consumption about 25%, on the other hand saves
Heating Gas Cooler and cooling energy consumption.
Different heating are arranged in the characteristics of present invention differs greatly according to decarbonized portion from heating tolerance needed for dewatering part
Mode, the biggish decarbonized portion of heating tolerance carries out circulating-heating regeneration, and heats the de- heavy hydrocarbon part of the lesser dehydration of tolerance and adopt
It with traditional heating mode, and adsorbs identical with cold blowing process, two sets of systems is organically combined and save a large amount of switching valve and portion
Subset reduces costs, it should be pointed out that dehydration cannot be combined circulating-heating with decarbonized portion, this is because circulation adds
There is moisture in the regeneration gas of heat, although the higher 13X molecular sieve that still micro can be adsorbed in decarburization bed of heating temperature
It is interior, influence the adsorption effect of next period carbon dioxide.
Detailed description of the invention:
Attached drawing 1 is flowage structure schematic diagram of the invention.
Wherein: 1, adsorption tower I, 2, adsorption tower II, 3, adsorption tower III, 4, storage heater, 5, heating gas supercharger, 6, heating
Device, 7, heating Gas Cooler, 8, cold blowing gas supercharger, 9, cold blowing Gas Cooler, 10, cold blowing gas supplement valve I, 11, heating gas
Supplement valve II.
Specific embodiment:
Embodiment 1:
Process system that is a kind of while removing carbon dioxide in natural, moisture and heavy hydrocarbon, composition include: adsorption tower I1, inhale
Attached tower II2, adsorption tower III3, it is characterized in that: the adsorption tower I, the adsorption tower II, the adsorption tower III into
Mouthful pipe is connect by valve with unstripped gas entrance, the adsorption tower I, the adsorption tower II, the adsorption tower III out
Mouth pipe is connect by valve with purification tracheae, and the purified natural gas pipe is connected by valve I10 with cold blowing inlet tube, described
Cold blowing outlet be connected with 9 inlet tube of cold blowing Gas Cooler, the cold blowing Gas Cooler outlet and cold blowing gas supercharger 8
Inlet tube is connected, and the cold blowing gas supercharger outlet connects with the cold blowing inlet tube and the purification tracheae respectively
It connects, the adsorption tower I, the adsorption tower II, the middle part adsorption tower III have outlet (carbon dioxide removal bed bottom
Portion), the outlet stove pipe is connect by valve with 4 inlet tube of storage heater, the accumulator outlet pipe and heating gas
The connection of 5 inlet tube of supercharger, the heating gas supercharger outlet are connected with 6 inlet tube of heater.
Embodiment 2:
According to described in embodiment 1 while removing the process system of carbon dioxide in natural, moisture and heavy hydrocarbon, the absorption
Tower I, the adsorption tower II, the adsorption tower III outlet at bottom pipe pass through valve and heating 7 inlet tube phase of Gas Cooler
Even, the heating Gas Cooler outlet is connect with fuel gas pipe, the carbon dioxide and day that adsorption tower removes in temperature-rise period
A small amount of mixed gas of right gas is as fuel.
Embodiment 3:
According to as described in example 2 while removing the process system of carbon dioxide in natural, moisture and heavy hydrocarbon, the accumulation of heat
Device inlet tube is connect with cold blowing Gas Cooler inlet tube by valve II11, as supplementary heating gas, the cold blowing air cooling
Device outlet is connect with cold blowing gas supercharger.
Embodiment 4:
The process system of carbon dioxide in natural, moisture and heavy hydrocarbon is removed while described according to embodiment 2 or 3, it is described
Adsorption tower I, the adsorption tower II, the adsorption tower III point are two-section batch, and lower end bed is for removing moisture and again
Hydrocarbon, filling molecular sieve and active carbon compounded mix, molecular sieve and silica gel compounded mix or molecular sieve and activated alumina is compound fills out
Material combination, upper end bed are used for carbon dioxide removal, fill 13X molecular sieve, can also according to circumstances be divided into every adsorption tower
Two concatenated adsorption towers, First tower remove moisture and heavy hydrocarbon, second tower carbon dioxide removal.
Embodiment 5:
The process system of carbon dioxide in natural, moisture and heavy hydrocarbon, the technique system are removed while according to embodiment 1-4
The method of system includes the following steps:
The source of unstripped gas is suitable for various natural gases first, is removed using three tower temp.-changing adsorptions and circularly-supercharged machine serial flow
Moisture, heavy hydrocarbon and carbon dioxide impurities in natural gas；
Using three tower temp.-changing adsorptions and circularly-supercharged machine serial flow, when adsorption tower I is in adsorbed state, adsorption tower II is in cold
When blowing state, adsorption tower III is in heated condition, and the starting circularly-supercharged machine of cold blowing gas carries out circulating cooling to adsorption tower II, follows
Ring cooling procedure reduces and with temperature due to being led to the supplement fuel gas bring pressure reduction of stove pipe road by purified gas
Valve I supplement is crossed to maintain pressure；Cold blowing gas can be cancelled when cold blowing tolerance is calculated less than or equal to purified gas flow to follow
Ring supercharger, whole purified gas, which are used as after cold blowing gas, returns to purification feed channel from the outlet of cold blowing Gas Cooler, thus simple flow；
The starting of gas supercharger is heated by the natural gas adsorption circulating-heating in adsorption tower III upper section and storage heater, heater, another part
Heating gas enters heating Gas Cooler cooling after flowing through adsorption tower lower section thermal dehydration and de- heavy hydrocarbon bed from adsorption tower upper section, it
Downstream pipe network is sent out or entered as fuel afterwards；This part heating gas is supplemented by valve II in pipeline.Due to the company of these gases
Continuous supplement, carbon dioxide of the adsorption tower upper section in heat gas during circulating-heating are able to gradually dilute and reach purification
It is required that；Adsorption cycle switches over after reaching, adsorption tower I heating, adsorption tower II absorption, and adsorption tower III cold blowing is recycled；
The more traditional wet process decarbonization process of the application, process is simple, equipment is few, project cost is low, easy to operate, and traditional is natural
Gas liquefaction device pretreating process, decarbonization process mostly use greatly active MDEA technique, and MDEA method is using 45%~50%
MDEA aqueous solution, and suitable activator is added to improve the absorption rate of carbon dioxide, MDEA is not degradable, has relatively strong
Anti- chemically and thermally degradation capability, corrosivity is small, and steam forces down, and solution cycling rate is low, and hydrocarbon solvability is small, is to answer at present
Solvent is handled with widest gas purification, almost all of natural gas liquefaction engineering is all made of MDEA technique both at home and abroad at present,
Although the technique has outstanding advantages of degree of purification is high, methane losses are small, complex process, take up a large area, invest compared with
Greatly, for the natural gas liquefaction plant with self power generation or downstream gas distributing system, dry method pretreating process can also be used, but
It is that traditional dry process is more than due to regenerating tolerance for the natural gas containing carbon dioxide content higher (typically larger than 1%)
Generator or gas turbine fuel demand, regeneration gas can not dissolve completely, thus limit its scope of application.
With 30 × 104Nm3For/d natural gas liquefaction engineering (it is assumed that carbon dioxide content 2% in unstripped gas), the present invention with
Traditional handicraft is compared to as follows:
As can be seen from the table, in indices, only one present invention of energy consumption is not so good as traditional approach, but is only primary
The heat consumption of the energy is slightly higher, and secondary energy sources power consumption is better than traditional approach.For being dragged using self power generation or gas turbine
The project of compressor, generator have a large amount of waste heat from tail gas, and heat is often not counted in cost, therefore the present invention is with the obvious advantage.
Claims (5)
1. a kind of process system for removing carbon dioxide in natural, moisture and heavy hydrocarbon simultaneously, composition include: adsorption tower I,
Adsorption tower II, adsorption tower III, it is characterized in that: the adsorption tower I, the adsorption tower II, the adsorption tower III into
Mouthful pipe is connect by valve with unstripped gas entrance, the adsorption tower I, the adsorption tower II, the adsorption tower III out
Mouth pipe is connect by valve with purification tracheae, and the purified natural gas pipe is connected by valve I with cold blowing inlet tube, described
Cold blowing outlet is connected with cold blowing Gas Cooler inlet tube, the cold blowing Gas Cooler outlet and the supercharger import of cold blowing gas
Pipe is connected, and the cold blowing gas supercharger outlet is connect with the cold blowing inlet tube and the purification tracheae respectively, institute
The adsorption tower I that states, the adsorption tower II, there is outlet in the middle part of the adsorption tower III, the outlet stove pipe passes through
Valve is connect with storage heater inlet tube, and the accumulator outlet pipe is connect with heating gas supercharger inlet tube, the heating
Gas supercharger outlet is connected with heater inlet pipe.
2. process system that is according to claim 1 while removing carbon dioxide in natural, moisture and heavy hydrocarbon, feature
Be: the adsorption tower I, the adsorption tower II, the adsorption tower III outlet at bottom pipe pass through valve and heating air cooling
Device inlet tube is connected, and the heating Gas Cooler outlet is connect with fuel gas pipe.
3. process system that is according to claim 2 while removing carbon dioxide in natural, moisture and heavy hydrocarbon, feature
Be: the storage heater inlet tube is connect with cold blowing Gas Cooler inlet tube by valve II, and the cold blowing Gas Cooler goes out
Mouth pipe is connect with cold blowing gas supercharger.
4. process system that is according to claim 3 while removing carbon dioxide in natural, moisture and heavy hydrocarbon, feature
Be: the adsorption tower I, the adsorption tower II, the adsorption tower III points are two-section batch, and lower end bed is for removing
Moisture and heavy hydrocarbon, filling molecular sieve and active carbon compounded mix, molecular sieve and silica gel compounded mix or molecular sieve and active oxidation
The combination of aluminium compounded mix, upper end bed are used for carbon dioxide removal, fill 13X molecular sieve, can also according to circumstances inhale every
Attached tower is divided into two concatenated adsorption towers, and First tower removes moisture and heavy hydrocarbon, second tower carbon dioxide removal.
5. technique system that is according to claim 1 or 2 or 3 or 4 while removing carbon dioxide in natural, moisture and heavy hydrocarbon
System, it is characterized in that: the method for the process system includes the following steps:
The source of unstripped gas is suitable for various natural gases first, is removed using three tower temp.-changing adsorptions and circularly-supercharged machine serial flow
Moisture, heavy hydrocarbon and carbon dioxide impurities in natural gas；
Using three tower temp.-changing adsorptions and circularly-supercharged machine serial flow, when adsorption tower I is in adsorbed state, adsorption tower II is in cold
When blowing state, adsorption tower III is in heated condition, and the starting circularly-supercharged machine of cold blowing gas carries out circulating cooling to adsorption tower II, follows
Ring cooling procedure reduces and with temperature due to being led to the supplement fuel gas bring pressure reduction of stove pipe road by purified gas
Valve I supplement is crossed to maintain pressure；Cold blowing gas can be cancelled when cold blowing tolerance is calculated less than or equal to purified gas flow to follow
Ring supercharger, whole purified gas, which are used as after cold blowing gas, returns to purification feed channel from the outlet of cold blowing Gas Cooler, thus simple flow；
The starting of gas supercharger is heated by the natural gas adsorption circulating-heating in adsorption tower III upper section and storage heater, heater, another part
Heating gas enters heating Gas Cooler cooling after flowing through adsorption tower lower section thermal dehydration and de- heavy hydrocarbon bed from adsorption tower upper section, it
Downstream pipe network is sent out or entered as fuel afterwards；This part heating gas is supplemented by valve II in pipeline.Due to the company of these gases
Continuous supplement, carbon dioxide of the adsorption tower upper section in heat gas during circulating-heating are able to gradually dilute and reach purification
It is required that；Adsorption cycle switches over after reaching, adsorption tower I heating, adsorption tower II absorption, and adsorption tower III cold blowing is recycled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811092634.9A CN109370670B (en) | 2018-09-20 | 2018-09-20 | Process system for simultaneously removing carbon dioxide, water and heavy hydrocarbon in natural gas |
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| CN201811092634.9A CN109370670B (en) | 2018-09-20 | 2018-09-20 | Process system for simultaneously removing carbon dioxide, water and heavy hydrocarbon in natural gas |
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| CN109370670B CN109370670B (en) | 2020-09-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113493710A (en) * | 2020-04-08 | 2021-10-12 | 中国石油天然气股份有限公司 | Fine desulfurization device and method |
| CN114856528A (en) * | 2022-05-11 | 2022-08-05 | 大庆市中瑞燃气有限公司 | Method for recovering waste heat of heavy hydrocarbon removal of wellhead gas |
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| CN207362167U (en) * | 2017-06-27 | 2018-05-15 | 成都深冷液化设备股份有限公司 | The composite bed adsorbent equipment of natural gas pretreatment |
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| CN113493710A (en) * | 2020-04-08 | 2021-10-12 | 中国石油天然气股份有限公司 | Fine desulfurization device and method |
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