CN101760269A - Gasoline-associated gas comprehensively using system - Google Patents
Gasoline-associated gas comprehensively using system Download PDFInfo
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- CN101760269A CN101760269A CN200910242925A CN200910242925A CN101760269A CN 101760269 A CN101760269 A CN 101760269A CN 200910242925 A CN200910242925 A CN 200910242925A CN 200910242925 A CN200910242925 A CN 200910242925A CN 101760269 A CN101760269 A CN 101760269A
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Abstract
The invention relates to a gasoline-associated gas comprehensively using system. The system comprises a crude oil processing device, a compressor, a pressure stabilization tank, a gas-fired boiler, a seawater desulfurizing system, an induced-draft fan and the like, wherein the crude oil processing device comprises an oil-gas separator and a heater; the collected gasoline-associated gas is pressure-lifted and pressure-stabilized by the compressor and the pressure stabilization tank so as to ensure the stable gas pressure and gas flow when the gas-fired boiler is used; the saturated steam generated by the gas-fired boiler enters an original steam net tube, and the burned waste smoke gas enters the seawater desulfurizing system; in a desulfurization absorption tower, the seawater is in countercurrent contact with the smoke gas for reaction to absorb the acid gas in the smoke gas and then enters a seawater recovery system for aeration, and the seawater is discharged when meeting the discharge standard; and the purified smoke gas is discharged to the atmosphere by the induced-draft fan through a chimney. The system has the advantages of fully recovering and utilizing the energy of the gasoline-associated gas, saving the steam for a sea platform, purifying the burned smoke gas, solving the pollution problem of the sea platform, and having high economy and a good application prospect.
Description
Technical field
The present invention relates to a kind of oil field gas utilization system, especially a kind of oil field gas utilization system that is applicable to offshore platform.
Background technology
Oil field gas is to be accompanied by the gas of selecting from oil well in the oil recovery process, and its main component is methane, also has a spot of ethane, propane, hydrogen sulfide, carbonic acid gas, mercaptan, nitrogen, moisture etc., is the fuel gas with higher calorific value.The mode that present most of oil field gas is taked to release flare is directly arranged to atmosphere.Be not only the huge waste of resource, also caused topsoil to a certain extent.In addition, the Greenhouse effect of associated gas are tens times of equal volume carbonic acid gas, and it is directly discharged atmosphere also is the huge hidden danger that causes Global Greenhouse Effect.
Impurity hydrogen sulfide in the associated gas is a kind of obnoxious flavour, and its existence can cause equipment and corrosion of pipe on the one hand, then can seriously threaten personal security on the other hand, if directly burning also can produce gases such as sulfurous gas, causes acid rain pollution.Oil field gas is used to produce liquefied gas after generally handling through desulfurization, dehydration and desalination etc., or as the fuel of combustion machine etc.
The common method of hydrogen sulfide that removes in the oil field gas has a variety ofly, is divided into dry method and wet method two big classes.Wet desulphurization generally is used for high sulfurous gas slightly takes off, and ubiquity shortcomings such as power consumption is big, equipment volume is huge, working cost is high, control condition harshness.It is applicable to that (sulphur content is about 46ppm～168ppm) processing to low sulfurous gas dry desulfurization, have that technology is simple, easy to operate, the desulfurization precision advantages of higher, but most of dry desulfurization need be changed sweetening agent, can not operate continuously, some sweetening agent can not be regenerated, and also can cause environmental pollution.
In addition, common natural gas desulfur method can generate by products such as sulphur, sulphur is a kind of mineral substance preferably, yet the offshore platform away from land and user does not generally have the sulphur demand, how disposing these desulfurizing byproducts also becomes than hang-up, if mishandling, may become new waste and be deposited on the platform, cause secondary pollution.
The oil field gas of offshore platform is generally because of local no user and former thereby do not obtain development and use for a long time away from pipe communication system etc., major part is all released flare by Sweet natural gas and is burnt at present, not only greatly wasted resource, and severe contamination the atmosphere of field area.How economical, reasonably develop this part natural gas source, reduce the field area topsoil, become the problem that China's natural gas industry needs to be resolved hurrily.Because platform space is limited, away from characteristics such as users, the oil field gas comprehensive utilization that technical process is long, equipment is complicated, investment and the high conventional gas purification techniques of process cost have not been suitable for offshore platform, the treatment technology that must select that investment is low, equipment simple, it is narrow-minded, easy to operate to handle, the overhaul phase is long etc.
In addition, generating set and heating equipment are topmost energy consumption equipments on the offshore platform.In processes such as Oil extraction, conveying, desalination, safe handling, the consumption of electric power and steam is all very big.If oil field gas fully can be recycled, be used for generating or heat supply, can not only reduce the development investment and the running cost of whole oil filed, can reduce the pollution of sulfide again, in today of global environmental requirement increasingly stringent, have very big realistic meaning.
The present invention is directed to current oil field gas and rationally utilize the defective and the above-mentioned technical problem that needs to be resolved hurrily of aspect, a kind of brand-new oil field gas integrated conduct method has been proposed, at the higher oil field gas of sulphur content, the method that adopts gas fired-boiler and Deuslfurizing system for sea water to combine, purpose is that the associated gas that fully burns is used for the heat supply of offshore platform, remove sulfide in the gas simultaneously, reduce environmental pollution, realize the comprehensive utilization of associated gas.
Summary of the invention
To achieve these goals, the invention provides a kind of oil field gas utilization system, particularly a kind of oil field gas utilization system that is suitable for offshore platform.This system is provided with crude oil treating device, compressor, buffer tank, gas fired-boiler, Deuslfurizing system for sea water, induced draft fan etc.This crude oil treating device comprises oil-gas separator that oil field gas is separated and is used for oil that heating and separating goes out so that the well heater that crude oil is dewatered from the crude oil of exploiting out.Compressor and buffer tank boost the oil field gas that compiles in the crude oil treating device and voltage stabilizing, and stable associated gas is originated during with the burning of assurance gas fired-boiler.Enter on the platform in original steam webmaster through the saturation steam of gas fired-boiler burning back generation, it is required to be used for the crude Treatment heat supply, can replace existing oil-firing boiler or the existing oil-firing boiler load of minimizing on the part platform, thereby reduce crude oil consumption, and reduce environmental pollution.The useless flue gas that comes out through gas fired-boiler enters Deuslfurizing system for sea water, and Deuslfurizing system for sea water comprises GGH (gas-to-gas heat exchanger), desulfuration absorbing tower, sea water booster pump and restoring sea water system.In desulfuration absorbing tower, draw up the fresh seawater of coming through sea water booster pump and directly enter the female pipe of spray, the nozzle atomization through being connected on the female pipe of spray becomes small droplets.Fresh seawater after nozzle atomization sprays downwards, contacts with flue gas adverse current from desulfuration absorbing tower bottom, and seawater absorbs the SO in the flue gas effectively
2Gas, and reaction generates various sulphite and vitriol.The desulfuration absorbing tower top is provided with a mist eliminator, is used for removing the excessive water droplet that flue gas carries.Flue gas after being purified enters GGH (gas-to-gas heat exchanger) heat exchange once more and heats up, and is arranged to atmosphere by chimney through induced draft fan.And the seawater after desulfurization absorbs enters the restoring sea water system, mixes with fresh seawater and blasts air in certain amount by Aeration fan, inferior sulfate radical SO
3 2-Be oxidized to sulfate radical SO
4 2-, simultaneously the pH value of seawater raises, and enters the sea after reaching the seawater discharge index.
Described oil field gas utilization system is fit to offshore platform or produces oil tanker.
Described compressor is used to improve collected oil field gas pressure.
Described buffer tank is used to guarantee to enter associated gas pressure stable of gas fired-boiler.The pressure of associated gas is lower in buffer tank, can not send into effectively when burning in the gas fired-boiler, and the control valve that leads on the torch pipeline will be opened, and torch is lighted, and the control valve on the associated gas of the gas fired-boiler supply simultaneously pipeline is closed, to ensure the safety of total system.
Described induced draft fan is used to overcome the pressure-losses of flue gas after being purified in flue and desulfuration absorbing tower, and flue gas can be discharged by chimney smoothly.
Gou Zao oil field gas utilization system has following advantage as mentioned above:
1, through collect, oil field gas after the voltage stabilizing enters gas fired-boiler and fully burns, the saturation steam of generation can directly be sent in the existing steam webmaster of offshore platform, is used for crude Treatment.This can substitute existing oil-firing boiler on the part platform, or reduces the load of original oil-firing boiler, reduces crude oil consumption.
2, lower or when stablizing inadequately, the control valve that leads to torch will be opened when the oil field gas pressure of collecting in the crude oil treating device, oil field gas will directly pass through torch burning, ensure the safety of total system.
3, employing sea water desulfuration method removes the sulfide in the flue gas, the absorption agent seawater can be chosen on the spot, the waste water of desulfurization discharging also can be handled through simple aeration, reach and be discharged into big marine going after the discharge index again, solved very easily that sweetening agent can not be regenerated in the natural gas desulfur method commonly used, technical process is loaded down with trivial details and the disposal of by product sulphur than problems such as difficulties.
Description of drawings
Fig. 1 is the schematic block diagram of oil field gas utilization system of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described.
Offshore platform is equipped with crude oil treating device usually, pre-treatment such as the crude oil that is used to split extraction outgases, dehydration, desalination.Among the present invention, at sea platform is equipped with crude oil treating device 1, and this crude oil treating device generally includes oil-gas separator 2 and well heater 3.The associated gas that oil-gas separator 2 is used for crude oil is contained separates with petroleum liquid, and well heater 3 is used for crude oil that heating and separating goes out so that crude oil is carried out processed.In processes such as Oil extraction, conveying, the degassing, dehydration, desalination, electric power and steam consumption are all very big.Offshore platform generally adopts oil-firing boiler generation saturation steam that crude oil is carried out the heating and separating dehydration, and generally adopts many generating set that use crude oil or diesel oil to power.
Among the present invention, discharge in the exit of crude oil treating device 1, make final petroleum products so that process is further handled through the oil after the degassing and the dehydration.
Among the present invention, the oil field gas after crude oil treating device 1 compiles is introduced into compressor 4 by control valve, through entering buffer tank 5 after boosting, enters in the burner of gas fired-boiler 6 with certain pressure then and burns.The saturation steam that gas fired-boiler produces is directly sent into the steam webmaster of offshore platform, is used to split crude oil that extraction the comes processed that outgases.The pressure of associated gas is lower in buffer tank 5; can not associated gas be sent into when burning in the gas fired-boiler effectively; torch will be opened and light to the control valve that leads on the torch pipeline, close simultaneously to the control valve on the gas fired-boiler supply associated gas pipeline, with the safety of securing system.
The useless flue gas that gas fired-boiler 6 burnings produce enters in the seawater desulfurizing and absorption tower 10 afterwards earlier by GGH (gas-to-gas heat exchanger) 7 heat exchange cooling.Deuslfurizing system for sea water of the present invention adopts fresh seawater to make absorption agent, directly enters the female pipe of spray through sea water booster pump 11, through being connected the nozzle atomization on the female pipe of spray.In desulfuration absorbing tower 10, the fresh seawater after nozzle atomization sprays downwards, contact with flue gas adverse current from desulfuration absorbing tower bottom, and seawater absorbs generation sulfite ion SO effectively with sulfur in smoke
3 2-Common seawater desulfurizing and absorption tower also can be selected packing type spray column or other type thionizer as required for the spray void tower.The top of desulfuration absorbing tower 10 is provided with a mist eliminator, is used for removing the excessive water droplet that flue gas carries.Flue gas after being purified enters GGH (gas-to-gas heat exchanger) 7 heat exchange once more and heats up, and is arranged to atmosphere by chimney 9 through induced draft fan 8.Seawater after desulfurization absorbs enters restoring sea water system 12, mixes with fresh seawater and blasts air in certain amount by Aeration fan, with inferior sulfate radical SO
3 2-Be oxidized to SO
4 2-, the pH value of seawater is increased to more than the emission standard, discharge the sea after reaching the seawater discharge index.
The ultimate principle of desulfuration absorbing tower 10 of the present invention is as described below: seawater is natural alkalescence, contains HCO
3 2-, CO
3 2-Deng negatively charged ion and Na
+, K
+, Ca
2+, Mg
2+Deng positively charged ion.Among the present invention, oil field gas burns through gas fired-boiler, the SO of generation
2Following dissociation reaction has taken place after water-soluble:
SO
2During dissolving, produce sulfurous acid, following dissociation reaction mainly take place when pH value is low:
Negatively charged ion HCO in the seawater
3 2-, CO
3 2-Can with H
+Following neutralization reaction takes place:
HCO
3 -+H
+→CO
2(g，l)+H
2O
Seawater has consumed the H that sulfurous acid ionization produces
+, impel more SO
2Be dissolved in and generate sulfurous acid in the seawater.And the various cationoid reactions in anions containing sulfur that sulfurous acid dissociates out and the seawater generate various sulphite and Sulfates.The various salts that generate enter the restoring sea water system along with reacted seawater is discharged from the desulfuration absorbing tower bottom together.In the restoring sea water system, absorbed SO
2Acid seawater mix with fresh seawater, and blast air in certain amount and carry out aeration, wherein unsettled SO
3 2-Be oxidized to stable and harmless SO
4 2-, and pH value returned to the degree identical with ambient water quality, finally arrange to the sea.
The above only for explaining the present invention's preferred embodiment, is not that attempt is done any pro forma restriction to the present invention according to this, so every under the present invention's creation spirit, any modification or the change done all must belong to the scope that the invention is intended to protection.
Claims (9)
1. oil field gas utilization system, it comprises crude oil treating device (1), compressor (4), buffer tank (5), gas fired-boiler (6), Deuslfurizing system for sea water (7,10,11,12), induced draft fan (8) etc.; It is characterized in that this compressor (4) and buffer tank (5) boost the oil field gas that compiles in the crude oil treating device (1) and voltage stabilizing, ensure gas fired-boiler (6) stable burning; The saturation steam that gas fired-boiler (6) generates is sent on the platform in original steam webmaster, and it is required to be used for crude oil treating device (1) heat supply; This Deuslfurizing system for sea water is connected with induced draft fan (8) with gas fired-boiler (6).The useless flue gas that Deuslfurizing system for sea water purifying gas boiler (6) burning is discharged, but the restoring sea water that will absorb sour gas simultaneously is to emission standard.
2. oil field gas utilization system according to claim 1 is characterized in that: described oil field gas is the oil field gas in offshore platform or the production oil tanker recover petroleum process.
3. oil field gas utilization system according to claim 2 is characterized in that: the energy of system recoveries oil field gas produces saturation steam by gas fired-boiler (6), for offshore platform institute heat requirement; Suit measures to local conditions again, adopt Deuslfurizing system for sea water, purify the oil field gas combustion gas, reduce environmental pollution.
4. oil field gas utilization system according to claim 2 is characterized in that: described crude oil treating device (1) is made up of oil-gas separator (2) and well heater (3).
5. oil field gas utilization system according to claim 2 is characterized in that: this compressor (4) is used to improve the pressure of the oil field gas that compiles.
6. oil field gas utilization system according to claim 2 is characterized in that: this buffer tank (5) is used for guaranteeing entering oil field gas pressure stable of gas fired-boiler (6).
7. oil field gas utilization system according to claim 2 is characterized in that: when buffer tank (5) internal pressure is low, open the pipe-line control valves that leads to torch, the oil field gas emptying is seted off, safeguards system safety.
8. oil field gas utilization system according to claim 2 is characterized in that: the saturation steam that described gas fired-boiler (6) burning back produces turns back to original steam webmaster on the offshore platform, is used for the heat supply of crude oil treating device (1) required.
9. oil field gas utilization system according to claim 2 is characterized in that: this induced draft fan (8) is used to overcome the pressure-losses of flue gas after being purified in flue and desulfuration absorbing tower (10), makes flue gas can enter chimney smoothly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910242925A CN101760269A (en) | 2009-12-17 | 2009-12-17 | Gasoline-associated gas comprehensively using system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910242925A CN101760269A (en) | 2009-12-17 | 2009-12-17 | Gasoline-associated gas comprehensively using system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102029104A (en) * | 2010-11-17 | 2011-04-27 | 东方锅炉（集团）股份有限公司 | Sea water desulfurization method and device as well as heat exchange system |
| CN102155614A (en) * | 2011-01-21 | 2011-08-17 | 中国石油天然气股份有限公司 | Recovery method and recovery system of natural gas in marginal offshore oil field |
| CN104005803A (en) * | 2014-05-29 | 2014-08-27 | 金海重工股份有限公司 | Ocean platform waste gas heat energy recycling device |
| CN107558959A (en) * | 2017-09-22 | 2018-01-09 | 吉敏 | A kind of accompanying gas with crude oil recycle device |
| CN111154524A (en) * | 2020-01-19 | 2020-05-15 | 中国石油天然气股份有限公司 | Low-gas-content oil well sulfur-containing associated gas interval type in-situ purification treatment method |
| CN111205898A (en) * | 2020-01-19 | 2020-05-29 | 中国石油天然气股份有限公司 | In-situ purification treatment system and method for associated gas direct supply gas boiler of low-sulfur oil field |
| CN113552281A (en) * | 2021-07-22 | 2021-10-26 | 徐志龙 | Associated gas high-altitude diffusion combustion chamber for offshore oil development |
| CN116556909A (en) * | 2023-04-19 | 2023-08-08 | 中国石油天然气股份有限公司 | Device and method for efficient separation and cyclic reinjection utilization of carbon dioxide flooding |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102029104A (en) * | 2010-11-17 | 2011-04-27 | 东方锅炉（集团）股份有限公司 | Sea water desulfurization method and device as well as heat exchange system |
| CN102155614A (en) * | 2011-01-21 | 2011-08-17 | 中国石油天然气股份有限公司 | Recovery method and recovery system of natural gas in marginal offshore oil field |
| CN102155614B (en) * | 2011-01-21 | 2013-05-01 | 中国石油天然气股份有限公司 | Recovery method and recovery system of natural gas in marginal offshore oil field |
| CN104005803A (en) * | 2014-05-29 | 2014-08-27 | 金海重工股份有限公司 | Ocean platform waste gas heat energy recycling device |
| CN107558959A (en) * | 2017-09-22 | 2018-01-09 | 吉敏 | A kind of accompanying gas with crude oil recycle device |
| CN111154524A (en) * | 2020-01-19 | 2020-05-15 | 中国石油天然气股份有限公司 | Low-gas-content oil well sulfur-containing associated gas interval type in-situ purification treatment method |
| CN111205898A (en) * | 2020-01-19 | 2020-05-29 | 中国石油天然气股份有限公司 | In-situ purification treatment system and method for associated gas direct supply gas boiler of low-sulfur oil field |
| CN111154524B (en) * | 2020-01-19 | 2021-04-30 | 中国石油天然气股份有限公司 | Low-gas-content oil well sulfur-containing associated gas interval type in-situ purification treatment method |
| CN113552281A (en) * | 2021-07-22 | 2021-10-26 | 徐志龙 | Associated gas high-altitude diffusion combustion chamber for offshore oil development |
| CN113552281B (en) * | 2021-07-22 | 2024-02-09 | 徐志龙 | Associated gas high-altitude diffusing combustion chamber for offshore oil development |
| CN116556909A (en) * | 2023-04-19 | 2023-08-08 | 中国石油天然气股份有限公司 | Device and method for efficient separation and cyclic reinjection utilization of carbon dioxide flooding |
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