CN106281524A - A kind of recoverying and utilizing method of non-combustible oil field gas - Google Patents
A kind of recoverying and utilizing method of non-combustible oil field gas Download PDFInfo
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- CN106281524A CN106281524A CN201610773612.3A CN201610773612A CN106281524A CN 106281524 A CN106281524 A CN 106281524A CN 201610773612 A CN201610773612 A CN 201610773612A CN 106281524 A CN106281524 A CN 106281524A
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- oil field
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/007—Supplying oxygen or oxygen-enriched air
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/32—Direct CO2 mitigation
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses the recoverying and utilizing method of a kind of non-combustible oil field gas, first the non-combustible oil field gas containing methane and carbon dioxide is sent into storage container；In burner, it is passed through oxygen-enriched air simultaneously, described oxygen-enriched air is the pure oxygen that concentration is more than 21%, and regulate oxygen flow, methane concentration is made to control in explosion limit 5% 15.4%, making the methane in storage container mix fully burning by burner with oxygen-enriched air by igniting, final burning generates highly purified carbon dioxide and steam.The oxygen-enriched combusting of the present invention is flammable oil field gas, it is to avoid emission pollution, it is achieved the recovery of methane energy uses, beneficially fuel gas generation and CO2The essence purification of industrial products.Technical matters is simple, it is easy to operates, invest little, low cost, it is adaptable to the resource comprehensive of non-combustible oil field gas is administered, and meets the duty requirements of Oil Field, it is achieved energy-saving and emission-reduction.
Description
Technical field
The present invention relates to oil field gas resource Treatment process field, be specifically related to returning of a kind of non-combustible oil field gas
Receive Application way.
Background technology
At present, oil field gas be oil field in recovery process, the gas overflowed together with oil between oil reservoir is (containing part
The natural gas being dissolved in oil), in addition to containing more methane, ethane, possibly together with a small amount of volatile liquid hydrocarbon (propane, butane)
With the carbon dioxide of trace, nitrogen, hydrogen sulfide, noble gas etc..Oil field gas content has difference because block is different, general first
Alkane accounts for 80%(31%-90%) more than, ethane 4%～10%, propane 3%～8%, butane and pentane system 2%～5%.At the recovery of associated gas
Reason refers to separate centre (ethane, propane, butane) and hydrocarbon heavy constituent from gas, is further processed into pure component or sky
So gas mixed liquor (NGL or LPG)；Or associated gas reclaim desulfurization and decarburization after lime set can produce up to target commercial natural gas (CNG or
LNG).Under normal circumstances, oil field gas can make fuel, belongs to available energy.But, due to by technological means system
About, in oil extraction process, associated gas is relatively difficult to control in addition, and associated gas is drained or burns greatly.
The oil field gas of some block is non-flammable (non-combustible component CO2Deng percentage composition higher than 50%～80%, CH4
Less than 30%), normal temperature and pressure cannot burn in atmosphere, calorific value is low.The domestic recovery at non-combustible oil field gas, utilization neck
Territory there is no mature technology, and foreign applications case is the most less.Carbon dioxide and water can generate carbonic acid, acid gilding metal conduit, taked
Sour gas in effect measure removing associated gas has realistic meaning.Conventional treatment method benefit is low, energy consumption is high, technique is multiple
Miscellaneous, that (carbon dioxide) acid gas removal of non-combustible oil field gas does not has to use for reference popularization technique.
The process for carbon dioxide recovery of common industrial has 1, rectification method/cryogenic distillation process.Rectification method is suitable for CO in gas2
Concentration higher (more than 60%) situation, but need low-temperature operation, energy consumption height, inferior separating effect, relatively costly, it is not suitable with medium and small rule
Mould produces, domestic few employing.2, (membrane material divides organic and inorganic membrane separation process.Gas separates multiplex cellulose acetate film, ethyl
Fiber plastic film, polyphenylene oxide and polysulfone membrane, the low molecule of acrylate are impregnated with the organic material films such as film).Technique is simple, inhales than solvent
Receipts method investment cost is low, and shortcoming is to need pretreatment, be dehydrated, filter；Membrane material will be by external import, by Multistage Membranes system ability
Realize comparatively ideal CO2Removing, it can be difficult to obtain highly purified CO2；Or must be with the method such as solvent absorption and pressure-variable adsorption
In conjunction with, separate through pre-separation and essence, complex process.3, (adsorption separation technology is divided into temp.-changing adsorption and transformation to physisorphtion
PSA adsorbs, and is used for gas CO2Middle content 30%～50% situation less expensive.).Competitive Adsorption and granule due to aqueous vapor
Causing adsorbent to inactivate, absorption method is rarely used in the decarbonization process of natural gas.4, absorption process (CO2Content is less than 30%).That is: may be used
Regenerated solvent absorbs and removes CO in (natural gas) gas2Technology, from absorbent whether with there is chemical reaction, can divide
For Physical Absorption method pressurization WATER-WASHING METHOD, low-temp methanol wash method, Fluor(Allyl carbonate) method, Selexol(Polyethylene Glycol diformazan
Ether) method, Purisol(N-first class ketopyrrolidine) method etc. and chemical absorption method { Benfield (hot potassium carbonate) method, MDEA(methyl two
Ethanolamine) method, amine process etc. }.Physical Absorption method poor selectivity, the response rate are low, energy consumption and operating cost high, the most very
Few application.Chemical absorption method shortcoming is that absorbent is corrosive, regenerates complexity, and investment is relatively big, energy consumption is high, operating cost is high, suitable
In large-scale industrial production.5, compression condensation method.Industry (liquid) CO is obtained by high pressure deep cooling2.The method low cost, work
Skill is simple, investment is little, but product is the most purified, aqueous and other composition height, it is impossible to for food processing.
Summary of the invention
The purpose of the present invention is aiming at the defect that prior art exists, it is provided that one is safe and reliable, technique simple, operation
Low cost, recovery utilization rate are good, product purity is high, the recycling of the non-combustible oil field gas of economical and practical, clean environment firendly
Method.
Its technical scheme is: the recoverying and utilizing method of a kind of non-combustible oil field gas, comprises the following steps:
1) first the non-combustible oil field gas containing methane and carbon dioxide is sent into storage container；
2) being passed through oxygen-enriched air in burner, described oxygen-enriched air is the pure oxygen that concentration is more than 21%, and regulates oxygen stream simultaneously
Amount, makes methane concentration control in explosion limit 5%-15.4%, makes the methane in storage container at burner with rich by igniting
Oxygen air fully burns, and final burning generates highly purified carbon dioxide and steam.
Also including carrying out non-combustible oil field gas separating-purifying in described step 1), described separating-purifying is for by adding
The method of pressure condensation separation lighter hydrocarbons takes off hydrocarbon.
The method of described pressurization condensation separation lighter hydrocarbons is to pass sequentially through the method separation that compression, cryogenic refrigeration and lime set separate
Go out lighter hydrocarbons, the final acquirement mixed gas containing methane and carbon dioxide.
Described step 2) in oxygen-enriched air be the high-purity oxygen manufactured by air separation technology oxygenerator, and by height
Purity oxygen contains in the second cylinder, and the second cylinder is connected with burner by pipeline.
Described step 2) in highly purified carbon dioxide can beneficially pressurize with steam condensation method separate production technical grade
CO2Product.
Described non-combustible oil field gas is in non-combustible gas, and the percentage composition of non-combustible component is higher than 50%, CH4Low
In the gas of 30%.
Described step 2) in regulation oxygen flow control to adjust flow by Pneumatic Transmission.
Described storage container is the first cylinder for depositing non-combustible oil field gas.
The present invention compared with prior art, has the advantage that by the oxygen-enriched combusting to non-combustible oil field gas,
Avoiding emission pollution, clean environment firendly, the recovery that can realize methane energy uses, beneficially fuel gas generation and CO2The essence of industrial products
Purifying, product purity is high.CO2Can be as the flushing well agent in oil field it can also be used to improve the tar productivity of oil well.Technical matters is simple,
Easily operated, invest little, low cost, it is adaptable to the resource comprehensive of non-combustible oil field gas is administered, and meets the work of Oil Field
Condition demand, can realize energy-saving and emission-reduction.
Detailed description of the invention
Embodiment one:
A kind of recoverying and utilizing method of non-combustible oil field gas, wherein, non-combustible oil field gas is in non-combustible gas,
CO279.91% is accounted for, CH etc. the percentage composition of non-combustible component4Concentration is 20.09%.Concrete data are: oxygen 0.28%, nitrogen
1.32%, methane 20.09%, carbon dioxide 75.13%, ethane 1.33%, propane 0.48%, iso-butane 0.07%, normal butane 0.22%,
Isopentane 0.10%, pentane 0.11%.
Comprise the following steps:
1) first the above-mentioned non-combustible oil field gas containing methane and carbon dioxide is sent into storage container.During concrete operations,
As required, by detecting the component of non-combustible oil field gas, when the de-hydrocarbon of needs processes, by pressurization condensation separation lighter hydrocarbons
Method it is carried out de-hydrocarbon.It is of course also possible to directly burn utilization without de-lighter hydrocarbons.Hydrocarbon mixture gas can directly fire
Burn, it is also possible to pressurization condensation separation lighter hydrocarbons.Wherein, the method for pressurization condensation separation lighter hydrocarbons is for passing sequentially through compression, cryogenic refrigeration
The method separated with lime set isolates lighter hydrocarbons, such as ethane, propane etc., the final acquirement gaseous mixture containing methane and carbon dioxide
Body.
2) being passed through oxygen-enriched air in burner, oxygen-enriched air is the height manufactured by air separation technology oxygenerator simultaneously
Purity oxygen, the i.e. concentration pure oxygen more than 21%, and high-purity oxygen is contained in the second cylinder, the second cylinder passes through pipeline
It is connected with memorizer and burner, or high-purity oxygen is connected with combustion tube separately through trachea.Time specifically used, regulate oxygen
Throughput, oxygen flow is controlled to adjust by Pneumatic Transmission；Methane concentration is made to control quick-fried by regulation oxygen flow
The fried limit 5% ~ 15.4%(tries one's best close to methane LEL), make the methane in storage container at burner with oxygen-enriched by igniting
Air fully burns, and final burning generates highly purified carbon dioxide and steam.
Burning torch is lighted and is tested and result:
By above-mentioned non-combustible associated gas, data are: oxygen 0.28%, nitrogen 1.32%, methane 20.09%, carbon dioxide
75.13%, ethane 1.33%, propane 0.48%, iso-butane 0.07%, normal butane 0.22%, isopentane 0.10%, pentane 0.11%, deposit
Store up into the first cylinder.
Can install dividing potential drop table (or effusion meter) (bottling gross pressure: 1MPa) on first cylinder additional, (bottling is total to prepare oxygen bottle
Pressure: 10MPa) the i.e. second cylinder, installs dividing potential drop table (or effusion meter) and cutting gun additional.Wherein, regulation oil field gas the first gas
Cylinder output pressure 0.3MPa, the second cylinder output pressure 0.09MPa, ignite with electronic lighter, make methane concentration control
In explosion limit 5%, complete burning torch and light test.It addition, carry out generating examination with 500W small-sized methane electromotor during oxygen-enriched combusting
Testing, result generates electricity successfully.
Embodiment two:
The data of the non-combustible associated gas obtained are: oxygen 0.3%, nitrogen 1.5%, methane 25%, carbon dioxide 70.73%, ethane
1.5%, propane 0.7%, iso-butane 0.07%, normal butane 0.1%, isopentane 0.2%, pentane 0.1%.
Comprise the following steps:
1) first the above-mentioned non-combustible oil field gas containing methane and carbon dioxide is sent into storage container.
2) being passed through oxygen-enriched air in burner, oxygen-enriched air is the height manufactured by air separation technology oxygenerator simultaneously
Purity oxygen, the i.e. concentration pure oxygen more than 21%, and high-purity oxygen is contained in the second cylinder, the second cylinder passes through pipeline
It is connected with storage container and burner.
Burning torch is lighted and is tested and result:
Above-mentioned non-combustible oil field gas is stored into the first cylinder.
Dividing potential drop table (or effusion meter) (bottling gross pressure: 1MPa) can be installed additional on first cylinder.Prepare oxygen bottle that is second
Cylinder (bottling gross pressure: 10MPa).Wherein, oil field gas the first cylinder output pressure 0.3MPa, the second cylinder output are regulated
Pressure 0.12 MPa, ignites with electronic lighter, makes methane concentration control in explosion limit 10%, and methane fully burns and (fills
Divided combustion principle: CH4+2O 2----CO2+2H2O(gaseous state), methane is 1:2 with the mol ratio of oxygen), complete burning torch and light test.
It addition, carry out power generation test with 500W small-sized methane electromotor during oxygen-enriched combusting, result generates electricity successfully.
Embodiment three:
The data of the non-combustible associated gas obtained are: oxygen 0.5%, nitrogen 1.5%, methane 19%, carbon dioxide 67%, ethane 4%,
Propane 3%, iso-butane 2%, normal butane 1%, isopentane 0.9%, pentane 1.1%.
Comprise the following steps:
1) first the above-mentioned non-combustible oil field gas containing methane and carbon dioxide is sent into storage container.Pass sequentially through pressure
The method that contracting, cryogenic refrigeration separate with lime set isolates lighter hydrocarbons, ethane, propane, butane etc. is spun off, and final acquirement is contained
The mixed gas of methane and carbon dioxide.
2) being passed through oxygen-enriched air in burner, oxygen-enriched air is the height manufactured by air separation technology oxygenerator simultaneously
Purity oxygen, the i.e. concentration pure oxygen more than 21%, and high-purity oxygen is contained in the second cylinder, the second cylinder passes through pipeline
It is connected with storage container and burner.
Burning torch is lighted and is tested and result:
Above-mentioned non-combustible oil field gas is stored into the first cylinder.
Dividing potential drop table (or effusion meter) (bottling gross pressure: 1MPa) can be installed additional on first cylinder.(bottling is total to prepare oxygen bottle
Pressure: 10MPa).Wherein, oil field gas the first cylinder output pressure 0.3MPa, the second cylinder output pressure 0.26 are regulated
MPa, ignites with electronic lighter, makes methane concentration control, in explosion limit 15.4%, to complete burning torch and light test.It addition,
Carrying out power generation test with 500W small-sized methane electromotor during oxygen-enriched combusting, result generates electricity successfully.
Wherein, highly purified carbon dioxide can beneficially pressurize with steam condensation method separate production technical grade CO2Product.
Storage container is the first cylinder for depositing non-combustible oil field gas.High-purity oxygen is contained into the second gas
In cylinder, the second cylinder is connected with burner and the first cylinder by pipeline, so oxygen-enriched air, non-combustible oil field gas is sent
Enter in burner, can carry out being applied to the oxygen-enriched combusting of fuel gas generation.
By the oxygen-enriched combusting of non-combustible oil field gas, 1, improve oxygen concentration (principle: CH4+2O 2----CO2+
2H2O(gaseous state)Fully burning) so that in non-combustible oil field gas, methane and pure oxygen reach explosion limit and (control in blast as far as possible
Lower limit.Methane content 5%～15.4% in atmosphere, meets naked light, electric spark or high temp objects, easily explodes.), thus complete
Become the recycling of methane.2, the combustion heat of methane is 90.31KJ/mol, and the net value of product vaporous water is 50200kJ/kg
(35900kJ/m3), combustible gas generating.3, end product is highly purified carbon dioxide and steam, is beneficial to pressurization condensation method etc.
Separate and produce technical grade CO2Product.
The oxygen-enriched combusting of the present invention is flammable oil field gas, it is to avoid emission pollution, it is achieved the recovery of methane energy uses, profit
In fuel gas generation and CO2The essence purification of industrial products.CO2Can be as the flushing well agent in oil field it can also be used to improve the oil recovery of oil well
Rate.Described technical matters is simple, it is easy to operates, invest little, low cost, it is adaptable to the resource comprehensive of non-combustible oil field gas is controlled
Reason, meets the duty requirements of Oil Field, it is achieved energy-saving and emission-reduction, significant to built environment friendly society.
The present invention is not limited to above-mentioned embodiment, in the ken that those skilled in the art are possessed, also may be used
To make a variety of changes on the premise of without departing from present inventive concept, the content after change still falls within protection scope of the present invention.
Claims (8)
1. the recoverying and utilizing method of a non-combustible oil field gas, it is characterised in that: comprise the following steps:
1) first the non-combustible oil field gas containing methane and carbon dioxide is sent into storage container；
2) being passed through oxygen-enriched air in burner, described oxygen-enriched air is the pure oxygen that concentration is more than 21%, and regulates oxygen flow,
Make methane concentration control in explosion limit 5%-15.4%, make the methane in storage container with oxygen-enriched in burner by igniting
Air mixing fully burning, final burning generates highly purified carbon dioxide and steam.
The recoverying and utilizing method of a kind of non-combustible oil field gas the most according to claim 1, it is characterised in that: described step
Rapid 1) also including carrying out non-combustible oil field gas separating-purifying in, described separating-purifying is by pressurization condensation separation lighter hydrocarbons
Method take off hydrocarbon.
The recoverying and utilizing method of a kind of non-combustible oil field gas the most according to claim 2, it is characterised in that add described in:
The method of pressure condensation separation lighter hydrocarbons is to pass sequentially through the method that compression, cryogenic refrigeration and lime set separate to isolate lighter hydrocarbons, finally takes
Must be containing the mixed gas of methane and carbon dioxide.
The recoverying and utilizing method of a kind of non-combustible oil field gas the most according to claim 1, it is characterised in that: described step
Rapid 2) oxygen-enriched air in is the high-purity oxygen manufactured by air separation technology oxygenerator, and high-purity oxygen is contained into
In second cylinder, the second cylinder is connected with burner by pipeline.
The recoverying and utilizing method of a kind of non-combustible oil field gas the most according to claim 4, it is characterised in that: described step
Rapid 2) the highly purified carbon dioxide in can beneficially pressurize with steam condensation method separate production technical grade CO2Product.
6. according to the recoverying and utilizing method of a kind of non-combustible oil field gas described in claim 1-5 any claim, its
Being characterised by: described non-combustible oil field gas is in non-combustible gas, the percentage composition of non-combustible component is higher than 50%, CH4Low
In the gas of 30%.
The recoverying and utilizing method of a kind of non-combustible oil field gas the most according to claim 1, it is characterised in that: described step
Rapid 2) in, regulation oxygen flow controls to adjust flow by Pneumatic Transmission.
The recoverying and utilizing method of a kind of non-combustible oil field gas the most according to claim 1, it is characterised in that deposit described in:
Storage container is the first cylinder for depositing non-combustible oil field gas.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565472A (en) * | 2021-07-29 | 2021-10-29 | 陈振 | Marine oil and gas development keeps off frame with being convenient for collect waste combustion products |
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| CN102442667A (en) * | 2011-09-30 | 2012-05-09 | 白洪亮 | Catching and refining device of carbon dioxide gas |
| CN105597497A (en) * | 2014-09-25 | 2016-05-25 | 气体产品与化学公司 | Membrane separation of carbon dioxide from natural gas with energy recovery |
| CN104403710A (en) * | 2014-10-08 | 2015-03-11 | 大连理工大学 | Method for increasing separation efficiency of oil field associated gas and recovering carbon dioxide |
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| CN105502395A (en) * | 2015-12-22 | 2016-04-20 | 四川天采科技有限责任公司 | Dealkylation process suitable for high hydrocarbon containing carbon-dioxide-enriched gas |
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| CN113565472A (en) * | 2021-07-29 | 2021-10-29 | 陈振 | Marine oil and gas development keeps off frame with being convenient for collect waste combustion products |
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