CN108570337A - A kind of dry decontamination method of natural gas - Google Patents
A kind of dry decontamination method of natural gas Download PDFInfo
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- CN108570337A CN108570337A CN201810360211.4A CN201810360211A CN108570337A CN 108570337 A CN108570337 A CN 108570337A CN 201810360211 A CN201810360211 A CN 201810360211A CN 108570337 A CN108570337 A CN 108570337A
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- Prior art keywords
- natural gas
- absorbent
- dry decontamination
- decontamination method
- gas
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Classifications
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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
-
- 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
- C10L3/103—Sulfur containing contaminants
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The present invention relates to a kind of dry decontamination methods of natural gas, belong to natural gas processing technical field.The dry decontamination method of the natural gas of the present invention, includes the following steps：1) sour gas in absorbent removing natural gas, the natural gas and the absorbent after absorption that sour gas must be removed are utilized；2) natural gas flow for removing sour gas is dried through hollow cellulose film, obtains purified natural gas.The dry decontamination method of the natural gas of the present invention, first removes the sour gas in natural gas such as hydrogen sulfide and carbon dioxide using absorbent, and the absorbent after absorption can also be obtained by heat treatment and be lived again to recycle；Remaining sour gas is further removed while dehydration using hollow cellulose film, dehydration draws addition, no additional materials consumption, non-secondary pollution without reagent；The dry decontamination method of the natural gas of the present invention, environmentally friendly, at low cost and purification efficiency is high, the application prospect having had.
Description
Technical field
The present invention relates to a kind of dry decontamination methods of natural gas, belong to natural gas processing technical field.
Background technology
In heat treatment, using natural gas as air source better than methanol, ethyl alcohol, acetone etc., with adding for city gasification rate
Soon, natural gas has become ordinary energy particularly important in people's daily life.But the problems such as sulfur-bearing, water of natural gas, to heat
Processing equipment and effect have an adverse effect, and therefore, need when in use first to selexol process processing.Selexol process generally may be used
It is divided into dry and wet two major classes.Wet method is big in the prevalence of power consumption, equipment volume is huge, operating cost is high, control strip
The shortcomings of part is harsh；Dry method is simple for process with its, easy to operate, desulfurization precision is high, low energy consumption suitable for lean sulphurous gas processing
And it is widely used.Existing sulfur removal technology is mainly by following several absorption processes：Absorption process includes chemistry, physics, physical chemistry
Absorption process.But whether being which kind of method, the wet purification gas generated after sulfur removal technology contains a large amount of steam.Steam with
Natural gas forms hydrate under certain condition and blocks pipeline, influences cooling liquid process.In addition, due to the presence of moisture
It can cause unnecessary power consumption；Since natural gas liquefaction temperature is relatively low, the presence of moisture and sour gas, which also results in, to be set
Standby frozen block, therefore must remove.
Invention content
The purpose of the present invention is to provide a kind of dry decontamination methods of natural gas, can efficiently be removed using this method
Sour gas in natural gas and moisture.
In order to achieve the above object, the technical scheme is that：
A kind of dry decontamination method of natural gas, includes the following steps：
1) sour gas in absorbent removing natural gas, the natural gas that sour gas must be removed and the suction after absorption are utilized
Receive agent；
2) natural gas flow for removing sour gas is dried through hollow cellulose film, obtains purified natural gas.
Absorbent in step 1) is the aqueous solution of methyl diethanolamine and activator.Since methyl diethanolamine only has one
A tertiary amine nitrogen-atoms, because tertiary amine nitrogen-atoms is without active hydrogen, unlike primary amine, secondary amine directly and carbon dioxide reaction, to two
Carbonoxide absorption efficiency is not high, and the adsorption effect of water and activator appropriate to improve absorbent to carbon dioxide is added, and dissociates
Hydrogen bond between amine and water enhances the activity reacted, and promotes the aquation of carbon dioxide.The absorbent of the present invention is provided simultaneously with
The characteristics of physical absorption and chemisorption, improve the analyzing efficiency of carbon dioxide reduces energy consumption again.
The mass fraction of methyl diethanolamine is 30~50% in the absorbent.
The mass fraction of activator is 1~5% in the absorbent.The mass fraction of activator of the present invention is only 1~
5%, concentration is smaller, not corrosive equipment, moreover it is possible to ensure the absorption efficiency to sour gas.
Under conditions of each concentration of above-mentioned absorbent, absorbent all has high absorption to hydrogen sulfide and carbon dioxide and imitates
Rate substantially can thoroughly remove sour gas hydrogen sulfide and carbon dioxide in natural gas.
The activator is appointing in monoethanolamine, diethanol amine, diethylenetriamine, triethylene tetramine, piperazine, sulfolane
Meaning is a kind of.Different activators plays the role of different, thus it is possible to vary MDEA and CO2The reaction mechanism mechanism of reaction, accelerate reaction rate, improve
The absorption rate of carbon dioxide can also reduce the equilibrium partial pressure of solution surface carbon dioxide, improve gas purification degree.
Absorbent after absorption in step 1) is heated to 60~150 DEG C of release of acid so that absorbent is lived again.
Hollow cellulose film in step 2) is polysulfone hollow fibre element film, cellulose acetate hollow cellulose film, polyamides
Any one in imines hollow cellulose film, cellulose/polyethersulfone blended hollow cellulose film.
Hollow cellulose film in step 2) is one kind of ultrafiltration membrane.It is residual when pending natural gas flow is through film surface
Acidic components (the H stayed2O、CO2With a small amount of H2S it) is preferentially removed through seperation film.Using natural gas pressure itself as
The motive force of purification, almost without the pressure loss；Hollow cellulose film is dehydrated, and no reagent is added, and belongs to dry cleaning, purge drying
It is consumed in the process without additional materials, without regeneration, non-secondary pollution；It is dehydrated using hollow cellulose film, process compatibility is strong, tool
Have while detachability, the carbon dioxide and hydrogen sulfide that not can be completely removed in step 1) can be also removed while dehydration, it is right
Natural gas is further purified.
The dry decontamination method of the natural gas of the present invention, first for example vulcanizes the sour gas in natural gas using absorbent
Hydrogen and carbon dioxide are removed, and the absorbent after absorption can also be obtained by heat treatment and be lived again to recycle；It utilizes
Remaining sour gas is further removed while hollow cellulose film is dehydrated, dehydration draws addition, no volume without reagent
Outer material consumption, non-secondary pollution；The dry decontamination method of the natural gas of the present invention, environmentally friendly, at low cost and purification efficiency is high, tool
The application prospect having had.
Specific implementation mode
The present invention is described further with reference to embodiments, but not limited to this.
Embodiment 1
The dry decontamination method of the natural gas of the present embodiment, includes the following steps：
1) sour gas (H in the aqueous solution of methyl diethanolamine and diethanol amine removing natural gas is utilized2S and CO2),
The natural gas and the absorbent after absorption that sour gas must be removed；Wherein the mass fraction of methyl diethanolamine is 30%, diethyl
The mass fraction of hydramine is 2%；
2) natural gas flow for removing sour gas is dried through cellulose acetate hollow cellulose film, is obtained purified
Natural gas；
3) absorbent in step 1) after absorption is heated to 80 DEG C to desorb sour gas, enables absorbent cycle profit
With.
Embodiment 2
The dry decontamination method of the natural gas of the present embodiment, includes the following steps：
1) sour gas (H in the aqueous solution of methyl diethanolamine and triethylene tetramine removing natural gas is utilized2S and
CO2), the natural gas and the absorbent after absorption that sour gas must be removed；Wherein the mass fraction of methyl diethanolamine is 40%,
The mass fraction of triethylene tetramine is 1%；
2) natural gas flow for removing sour gas is dried through polyimide hollow fiber element film, obtains purified day
Right gas；
3) absorbent in step 1) after absorption is heated to 100 DEG C to desorb sour gas, enables absorbent cycle profit
With.
Embodiment 3
The dry decontamination method of the natural gas of the present embodiment, includes the following steps：
1) sour gas (H in the aqueous solution of methyl diethanolamine and piperazine removing natural gas is utilized2S and CO2), it obtains de-
Except the absorbent after the natural gas of sour gas and absorption；Wherein the mass fraction of methyl diethanolamine is 50%, the matter of piperazine
It is 5% to measure score；
2) natural gas flow for removing sour gas is dried through cellulose/polyethersulfone blended hollow cellulose film, is obtained
Purified natural gas；
3) absorbent in step 1) after absorption is heated to 60 DEG C to desorb sour gas, enables absorbent cycle profit
With.
Embodiment 4
The dry decontamination method of the natural gas of the present embodiment, includes the following steps：
1) sour gas (H in the aqueous solution of methyl diethanolamine and piperazine removing natural gas is utilized2S and CO2), it obtains de-
Except the absorbent after the natural gas of sour gas and absorption；Wherein the mass fraction of methyl diethanolamine is 50%, the matter of piperazine
It is 5% to measure score；
2) natural gas flow for removing sour gas is dried through cellulose/polyethersulfone blended hollow cellulose film, is obtained
Purified natural gas；
3) absorbent in step 1) after absorption is heated to 150 DEG C to desorb sour gas, enables absorbent cycle profit
With.
It will be apparent to those skilled in the art that technical solution that can be as described above and design, make various other
Corresponding change and deformation, and all these changes and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (7)
1. a kind of dry decontamination method of natural gas, which is characterized in that include the following steps：
1) sour gas in absorbent removing natural gas, the natural gas that sour gas must be removed and the absorption after absorption are utilized
Agent；
2) natural gas flow for removing sour gas is dried through hollow cellulose film, obtains purified natural gas.
2. the dry decontamination method of natural gas according to claim 1, which is characterized in that the absorbent in step 1) is first
The aqueous solution of base diethanol amine and activator.
3. the dry decontamination method of natural gas according to claim 2, which is characterized in that methyl diethyl in the absorbent
The mass fraction of hydramine is 30~50%.
4. the dry decontamination method of natural gas according to claim 2, which is characterized in that activator in the absorbent
Mass fraction is 1~5%.
5. the dry decontamination method of natural gas according to claim 2, which is characterized in that the activator is an ethyl alcohol
Any one in amine, diethanol amine, diethylenetriamine, triethylene tetramine, piperazine, sulfolane.
6. to go the dry decontamination method of the natural gas described in 2 according to right, which is characterized in that by the suction after absorption in step 1)
It receives agent and is heated to 60~150 DEG C of release of acid so that absorbent is lived again.
7. the dry decontamination method of natural gas according to claim 1, which is characterized in that the hollow cellulose in step 2)
Film is polysulfone hollow fibre element film, cellulose acetate hollow cellulose film, polyimide hollow fiber element film, cellulose/polyethers
Any one in hollow cellulose film is blended in sulfone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810360211.4A CN108570337A (en) | 2018-04-20 | 2018-04-20 | A kind of dry decontamination method of natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810360211.4A CN108570337A (en) | 2018-04-20 | 2018-04-20 | A kind of dry decontamination method of natural gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108570337A true CN108570337A (en) | 2018-09-25 |
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ID=63575196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810360211.4A Pending CN108570337A (en) | 2018-04-20 | 2018-04-20 | A kind of dry decontamination method of natural gas |
Country Status (1)
| Country | Link |
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| CN (1) | CN108570337A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112831349A (en) * | 2020-12-11 | 2021-05-25 | 中国石油天然气股份有限公司 | Method for improving utilization efficiency of associated gas of oil field operation station |
Citations (4)
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| US20080295692A1 (en) * | 2007-06-01 | 2008-12-04 | Chunqing Liu | Uv cross-linked polymer functionalized molecular sieve/polymer mixed matrix membranes for sulfur reduction |
| US20120103185A1 (en) * | 2010-11-01 | 2012-05-03 | Saudi Arabian Oil Company | Sour Gas and Acid Natural Gas Separation Membrane Process by Pre Removal of Dissolved Elemental Sulfur for Plugging Prevention |
| CN102757831A (en) * | 2012-08-08 | 2012-10-31 | 天津大港油田科远石油工程有限责任公司 | Compound decarburization solution for removing carbon dioxide in natural gas and preparation method thereof |
| CN103657382A (en) * | 2013-11-29 | 2014-03-26 | 浙江大学 | Method for removing carbon dioxide from gas mixture through biphasic absorption |
-
2018
- 2018-04-20 CN CN201810360211.4A patent/CN108570337A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080295692A1 (en) * | 2007-06-01 | 2008-12-04 | Chunqing Liu | Uv cross-linked polymer functionalized molecular sieve/polymer mixed matrix membranes for sulfur reduction |
| US20120103185A1 (en) * | 2010-11-01 | 2012-05-03 | Saudi Arabian Oil Company | Sour Gas and Acid Natural Gas Separation Membrane Process by Pre Removal of Dissolved Elemental Sulfur for Plugging Prevention |
| CN102757831A (en) * | 2012-08-08 | 2012-10-31 | 天津大港油田科远石油工程有限责任公司 | Compound decarburization solution for removing carbon dioxide in natural gas and preparation method thereof |
| CN103657382A (en) * | 2013-11-29 | 2014-03-26 | 浙江大学 | Method for removing carbon dioxide from gas mixture through biphasic absorption |
Non-Patent Citations (5)
| Title |
|---|
| 中国石油大学（北京）重质油国家重点实验室编: "《第九届全国化学工艺年会论文集 上》", 30 April 2005 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112831349A (en) * | 2020-12-11 | 2021-05-25 | 中国石油天然气股份有限公司 | Method for improving utilization efficiency of associated gas of oil field operation station |
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Application publication date: 20180925 |
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