CN216513728U - Portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas - Google Patents
Portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas Download PDFInfo
- Publication number
- CN216513728U CN216513728U CN202220053310.XU CN202220053310U CN216513728U CN 216513728 U CN216513728 U CN 216513728U CN 202220053310 U CN202220053310 U CN 202220053310U CN 216513728 U CN216513728 U CN 216513728U
- Authority
- CN
- China
- Prior art keywords
- carbon dioxide
- gas
- coal bed
- separating
- hydrocarbons
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
This technical scheme discloses a carbon dioxide and hydrocarbon separation and recovery system in portable oil field associated gas or coal bed gas, including be used for storing from the oil well blowout, through the associated gas of three-phase separation or the condensation gas holder of coal bed gas, connect in the condensation gas holder is used for with associated gas or coal bed gas refrigerated condenser, the condenser is connected respectively in heavy hydrocarbon collector and fractionating tower, the fractionating tower is connected and the configuration of active carbon tank, the active carbon tank cooperates with the membrane group. The technical problem solved by the technical scheme is as follows: how to make whole separation and recovery system be convenient for transport, separate and retrieve heavy hydrocarbon and carbon dioxide simultaneously.
Description
Technical Field
The utility model relates to a system for separating and recovering carbon dioxide and hydrocarbons in associated gas or coal bed gas of an oil field, which has the core innovation point that the system is small-sized and integrated so as to be convenient for transportation by a conventional transportation platform, thereby being suitable for small-sized oil fields with the mining quantity of less than 5 ten thousand cubic meters or days.
Background
The oil field well head quantity is huge in China, and all kinds of gas composition are complicated in associated gas or coal bed gas, and associated gas has higher economic value, and contains more carbon dioxide, under the environment that current carbon emission pressure is big, need solve the problem of light hydrocarbon, heavy hydrocarbon and carbon dioxide separation in the associated gas. This problem is mainly solved at present with small and heavy equipment. Among them, the small-sized facilities for separating C4, C3, C2, and C1 from carbon dioxide cause difficulty in separation due to problems in process and facility integration. The large-scale huge equipment has large investment and high energy consumption, and the equipment is difficult to transport after the oil well is exhausted.
Through search, chinese patent publication No. 20201225 discloses a process and apparatus for recycling liquefied gas sweetening tail gas. The tail gas containing hydrocarbons and sulfide is pressurized and explosion limit is controlled, and then is fed into catalytic cracking regenerator, and the hydrocarbons and sulfide undergo the high-temp. catalytic cracking reaction to produce carbon dioxide and SO2In which SO2And the flue gas enters a desulfurization device along with the flue gas to be desulfurized and then is discharged in an environment-friendly way. The device can only process hydrocarbons and process SO2The carbon dioxide cannot be recovered by collection.
Chinese patent publication No. 20210430 discloses a membrane process low-temperature methanol washing tail gas treatment device, which comprises: the flash tank is used for carrying out flash evaporation treatment on the methanol absorption liquid subjected to crude gas washing; a CO2 separation membrane connected with the flash tank and used for carrying out membrane separation treatment on the hydrocarbon-containing CO2 gas obtained from the flash tank, so that CO2 in the gas can permeate the gas and the hydrocarbons can be trapped; and the oxidation combustion furnace is connected to the permeation side of the CO2 separation membrane and is used for oxidizing the CO2 gas obtained from the permeation side to remove combustible gas components. The carbon dioxide and combustible components such as hydrocarbons and the like are separated through membrane separation, effective gas recycling is realized, the content of the hydrocarbon components in the discharged waste gas is reduced, and the hydrocarbon recovery rate of the low-temperature methanol washing process is improved. The method not only recovers high-value combustible components such as hydrocarbons, but also greatly reduces the treatment pressure of the oxidative combustion section and ensures the emission requirements up to the standard because of separating carbon dioxide in the discharged waste gas. The method belongs to the technology at the front, but the whole equipment is large, and the problem of inconvenient transportation is also existed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a portable system for separating and recovering carbon dioxide and hydrocarbons in associated gas or coal bed gas of an oil field, which solves the technical problems that: how to make whole separation and recovery system be convenient for transport, separate and retrieve heavy hydrocarbon and carbon dioxide simultaneously.
A portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas comprises a condensation gas storage tank for storing associated gas or coal bed gas which is sprayed from an oil well and is subjected to three-phase separation, and a condenser connected to the condensation gas storage tank and used for cooling the associated gas or the coal bed gas, wherein the condenser is respectively connected to a heavy hydrocarbon collector and a fractionating tower, the fractionating tower is connected and configured with an active carbon tank, the active carbon tank is matched with a membrane group, the membrane group is matched with a compressor, and the compressor is sequentially matched with a carbon dioxide purifier for purifying the carbon dioxide, a liquefier for liquefying the carbon dioxide and a liquid carbon dioxide storage tank for storing the carbon dioxide; condensation gas holder, condenser, heavy hydrocarbon collector, fractionating tower, activated carbon jar, membrane group, compressor, carbon dioxide purifier, carbon dioxide liquefier and liquid carbon dioxide storage jar are all installed on the base of activity transportation.
The condenser is matched with a water chilling unit, and the water chilling unit is used for providing freezing water with the temperature of 7 ℃ to the condenser so as to cool the associated gas or the coalbed methane to the temperature of 10 ℃.
And the fractionating tower is internally provided with a filler for separating the boiling points of the heavy hydrocarbon gas, the light hydrocarbon gas and the carbon dioxide.
The heavy hydrocarbon collector is arranged at the bottom of the fractionating tower and is communicated with the inner cavity of the fractionating tower.
The heavy hydrocarbon collector is used for collecting liquid heavy hydrocarbon cooled in the condenser, and the fractionating tower is used for separating out residual heavy hydrocarbon in residual associated gas or coal bed gas, wherein the refrigerating temperature in the fractionating tower is kept between-20 ℃ and-15 ℃.
And the membrane group is internally provided with a separation membrane which is separated at different pressure sides of the separation membrane according to light hydrocarbon and carbon dioxide in associated gas or coal bed gas.
The compressor is used for pressurizing carbon dioxide separated from the membrane to 2.5 Mpa.
And a first oil-water filtering separator is arranged between the condensation gas storage tank and the condenser, a second oil-water filtering separator is arranged between the condenser and the fractionating tower, and the first oil-water filtering separator and the second oil-water filtering separator have the same structure.
And a dust filter is arranged between the carbon dioxide purifier and the carbon dioxide liquefier.
An electrical control box is arranged on the base.
The utility model has the beneficial effects that: according to the utility model, a plurality of small-sized devices are integrated, and the integrated devices are arranged on a movable transportation platform, so that light hydrocarbon, heavy hydrocarbon and carbon dioxide in associated gas or coal bed gas sprayed from an oil well of an oil field can be separated, the heavy hydrocarbon is recovered in a liquid state, the light hydrocarbon is conveyed to a pipe network for recycling, and the carbon dioxide is injected into the oil field for recycling after separation, purification and liquefied storage, so that the whole equipment is miniaturized and lightened; meanwhile, when the oil well is exhausted, the equipment can be transported to the next oil well easily, the energy consumption of the equipment is reduced, and the installation, the disassembly and the transportation are convenient.
Drawings
FIG. 1 is a schematic view of a system for separating and recovering carbon dioxide and hydrocarbons from associated gas or coal bed gas in an oil field;
fig. 2 is a schematic structural diagram of a system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas, which is installed on a base;
in the figure, 1, a condensation gas storage tank, 2, a condenser, 3, a heavy hydrocarbon collector, 4, a fractionating tower, 5, an activated carbon tank, 6, a membrane group, 7, a compressor, 8, a carbon dioxide purifier, 9, a carbon dioxide liquefier, 10, a liquid carbon dioxide storage tank, 11, a water chilling unit, 12, a first oil-water filtering separator, 13, a second oil-water filtering separator, 14, a dust filter, 15, a base and 16, and an electrical control box are arranged.
Detailed Description
Referring to fig. 1 and 2, the core of the design of the present application is how to achieve the separation and recovery functions by using the existing equipment according to the characteristics of the small oil field, and at the same time, to miniaturize the equipment, thereby facilitating transportation.
The system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas comprises a condensation gas storage tank 1, a condenser 2, a heavy hydrocarbon collector 3, a fractionating tower 4, an activated carbon tank 5, a membrane group 6, a compressor 7, a carbon dioxide purifier 8, a carbon dioxide liquefier 9, a liquid carbon dioxide storage tank 10, a water chilling unit 11, a first oil-water filtering separator 12, a second oil-water filtering separator 13, a dust filter 14, a base 15 and an electric control box 16. The above-described devices can be made using existing components or be adaptively optimized based on existing components.
Oil-water-gas mixture sprayed from the oil well is firstly subjected to three-phase separation, and the separated associated gas or coal bed gas enters a condensation gas storage tank 1, so that primary gas is cooled and condensed liquid substances are separated. The primarily cooled and settled associated gas or coal bed gas enters a condenser 2. The condenser 2 and the water chilling unit 11 are configured together in a conventional manner, the water chilling unit 11 supplies chilled water with the temperature of 7 ℃ to the condenser 2 so as to cool associated gas or coal bed gas to 10 ℃, most of water vapor and most of heavy hydrocarbons such as 100% of C7, 80% of C6, 50% of C5 and 30% of C4 are separated from the associated gas or coal bed gas, the separated liquid heavy hydrocarbons enter the heavy hydrocarbon collector 3 and are processed and treated in a centralized manner, and the rest of the associated gas or coal bed gas enters the fractionating tower 4.
The refrigeration temperature in the fractionating tower 4 is kept between-15 ℃ and-20 ℃, so that the heavy hydrocarbon remained in the associated gas or the coal bed gas is separated. Add in the fractionating tower 4 and be used for the conventional filler that pulls open heavy hydrocarbon gas and light hydrocarbon gas, carbon dioxide boiling point, through 4 separation backs of fractionating tower, remaining heavy hydrocarbon in associated gas or the coal bed gas is whole C4 and above hydrocarbons promptly, and materials such as 60% ~ 90% C3 can whole liquefaction separate out, and 4 bottoms of fractionating tower and the cooperation of heavy hydrocarbon collector 3 are convenient for collect liquid heavy hydrocarbon like this.
The fractionating tower 4 is simultaneously configured with the inlet of the activated carbon tank 5, the outlet of the activated carbon tank 5 is configured with the membrane group 6, and the associated gas or coal bed gas is filtered by the activated carbon tank 5 and then separated into light hydrocarbons, namely C1, C2 and carbon dioxide, in the membrane group 6. The carbon canister 5 removes the free partially gaseous C3 and prevents the C3 from damaging the separation membrane module 6. The membrane group 6 is internally provided with a conventional separation membrane, so that light hydrocarbon and carbon dioxide in associated gas or coal bed gas are separated out at different pressure sides of the separation membrane, the light hydrocarbon is separated out at a high-pressure side and conveyed to a pipe network for recycling, and the carbon dioxide is separated out at a normal-pressure side. The specific arrangement of the separation membrane can be referred to existing equipment.
The membrane group 6 is matched with the compressor 7 according to a conventional mode, so that the compressor 7 pressurizes carbon dioxide separated from the membrane group 6 to 2.5Mpa, the pressurized carbon dioxide enters the carbon dioxide purifier 8, water is removed through molecular sieve purification, and then the carbon dioxide is sequentially conveyed to the carbon dioxide liquefier 9 and the liquid carbon dioxide storage tank 10.
For filtering, a first oil-water filter separator 12 is arranged between the condensing gas storage tank 1 and the condenser 2, a second oil-water filter separator 13 is arranged between the condenser 2 and the fractionating tower 4, and the gas purification degree is better by using the two filters. Correspondingly, a dust filter 14 is arranged between the carbon dioxide purifier 8 and the carbon dioxide liquefier 9, other dust in the carbon dioxide can be filtered, and in practical application, the dust filter 14 can also increase an electromagnetic function, so that materials such as iron and the like generated by possible equipment corrosion can be removed.
The condensation gas storage tank 1, the condenser 2, the heavy hydrocarbon collector 3, the fractionating tower 4, the activated carbon tank 5, the membrane group 6, the compressor 7, the carbon dioxide purifier 8, the carbon dioxide liquefier 9 and the liquid carbon dioxide storage tank 10 can be mounted on a transportable base 15, and the base 15 is equivalent to a movable transportation platform. The base 15 is also provided with an electric control box 16 or uses the customer's own electric control box 16. The whole system adopts a modular design, the system for gas quantity lower than 50000m or days can be transported in a container type by two flat trucks, and can be used by connecting a pipeline power supply after arriving at a destination, and can be quickly transferred to the next using point after the gas source of an oil well is exhausted. Through practical use, the product of this case is owing to compact structure, small and exquisite, comprehensive properties is better.
The system can separate light hydrocarbon, heavy hydrocarbon and carbon dioxide in associated gas or coal bed gas sprayed by an oil well of an oil field, the heavy hydrocarbon is recovered in a liquid state, the light hydrocarbon is conveyed to a pipe network for reuse, the carbon dioxide is separated, purified, liquefied and stored and then injected into the oil field for reuse, the whole equipment is miniaturized and lightened, when a single-port oil well is exhausted, the equipment can be transferred to the next oil well,
the energy consumption of the equipment is reduced, and the installation, the disassembly and the transportation are convenient.
The above-described embodiments are merely illustrative of the present invention and are not intended to limit the present invention. In the description of the present technical solution, it should be noted that the terms such as "upper", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for convenience of describing the technical solution and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the technical solution.
Meanwhile, in the description of the present technical solution, it should be noted that, unless explicitly stated or limited otherwise, the terms "fixed" and "coupled" should be interpreted broadly, and for example, they may be fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present technical solution can be understood by those of ordinary skill in the art according to specific situations.
Although embodiments of the present technical solution have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the technical solution, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. Carbon dioxide and hydrocarbon separation and recovery system in portable oil field associated gas or coal bed gas, its characterized in that: the device comprises a condensation gas storage tank (1) for storing associated gas or coal bed gas which is sprayed out from an oil well and is subjected to three-phase separation, and a condenser (2) which is connected to the condensation gas storage tank (1) and is used for cooling the associated gas or the coal bed gas, wherein the condenser (2) is respectively connected to a heavy hydrocarbon collector (3) and a fractionating tower (4), the fractionating tower (4) is connected and configured with an activated carbon tank (5), the activated carbon tank (5) is matched with a membrane group (6), the membrane group (6) is matched with a compressor (7), and the compressor (7) is sequentially matched with a carbon dioxide purifier (8) for purifying carbon dioxide, a liquefier for liquefying the carbon dioxide and a liquid carbon dioxide storage tank (10) for storing the carbon dioxide; wherein; condensation gas holder (1), condenser (2), heavy hydrocarbon collector (3), fractionating tower (4), activated carbon tank (5), membrane group (6), compressor (7), carbon dioxide purifier (8), carbon dioxide liquefier (9) and liquid carbon dioxide storage jar (10) all install on base (15) of activity transportation.
2. The portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas according to claim 1, wherein: condenser (2) and cooling water set (11) cooperation, cooling water set (11) are for providing 7 ℃ of freezing water to condenser (2) with associated gas or coal bed gas cooling to 10 ℃ of cooling water set (11).
3. The portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas according to claim 2, wherein: and a packing for separating the boiling points of heavy hydrocarbon gas, light hydrocarbon gas and carbon dioxide is arranged in the fractionating tower (4).
4. The portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas according to claim 3, wherein: the heavy hydrocarbon collector (3) is arranged at the bottom of the fractionating tower (4) and is communicated with the inner cavity of the fractionating tower (4).
5. The portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas according to claim 4, wherein: the heavy hydrocarbon collector (3) is used for collecting liquid heavy hydrocarbon cooled in the condenser (2), the fractionating tower (4) is used for separating residual heavy hydrocarbon in residual associated gas or coal bed gas, and the refrigerating temperature in the fractionating tower (4) is kept between-20 ℃ and-15 ℃.
6. The portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas according to claim 5, wherein: and a separation membrane is arranged in the membrane group (6), and is separated according to light hydrocarbon and carbon dioxide in associated gas or coal bed gas at different pressure sides of the separation membrane.
7. The portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas according to claim 6, wherein: the compressor (7) is used for pressurizing the carbon dioxide separated from the membrane group (6) to 2.5 Mpa.
8. The portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas according to claim 7, wherein: a first oil-water filtering separator (12) is arranged between the condensation gas storage tank (1) and the condenser (2), a second oil-water filtering separator (13) is arranged between the condenser (2) and the fractionating tower (4), and the first oil-water filtering separator (12) and the second oil-water filtering separator (13) are identical in structure.
9. The portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas according to claim 8, wherein: a dust filter (14) is arranged between the carbon dioxide purifier (8) and the carbon dioxide liquefier (9).
10. The portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas according to claim 9, wherein: an electric control box (16) is arranged on the base (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220053310.XU CN216513728U (en) | 2022-01-11 | 2022-01-11 | Portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220053310.XU CN216513728U (en) | 2022-01-11 | 2022-01-11 | Portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216513728U true CN216513728U (en) | 2022-05-13 |
Family
ID=81517405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220053310.XU Active CN216513728U (en) | 2022-01-11 | 2022-01-11 | Portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216513728U (en) |
-
2022
- 2022-01-11 CN CN202220053310.XU patent/CN216513728U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101456556B (en) | Carbon dioxide industrial-scale separation and purification system and method in mixture gas by hydrate method | |
| USRE39826E1 (en) | Comprehensive natural gas processing | |
| CN101104825B (en) | Method for producing liquefied natural gas of mine gas | |
| CN108689381B (en) | Oil gas recovery system and recovery method for oil loading and unloading platform of refinery area | |
| CN111533095A (en) | Equipment and process for purifying helium from BOG gas | |
| CN103060036A (en) | Method and system for coalbed methane liquefaction | |
| CN107413173B (en) | Efficient organic waste gas recovery treatment method and complete device | |
| US20070163256A1 (en) | Apparatus and methods for gas production during pressure letdown in pipelines | |
| US11066347B2 (en) | Purification and liquefaction of biogas by combination of a crystallization system with a liquefaction exchanger | |
| CN102121370B (en) | Skid-mounted bradenhead gas four-tower separation recovery device and method thereof | |
| WO2005064122A1 (en) | Apparatus and methods for gas production during pressure letdown in pipelines | |
| CN216513728U (en) | Portable system for separating and recovering carbon dioxide and hydrocarbons in oilfield associated gas or coal bed gas | |
| CN114017994A (en) | Process for purifying carbon dioxide from alcohol tail gas | |
| CN104194852A (en) | High-yield light hydrocarbon recovery method from low-pressure natural gas | |
| CN107641535B (en) | Device and method for separating and purifying various gases by membrane cryogenic coupling | |
| CN113154798A (en) | Multi-target separation process for comprehensively utilizing liquefied tail gas of helium-rich natural gas | |
| CN101874962B (en) | Process and matching system for separating carbonylation feed gas | |
| WO2009102230A1 (en) | Method for comprehensively processing variable composition hydrocarbon gases of gaseous condensate and oil deposits for simultaneously producing therefrom aromatic hydrocarbons, hydrogen, methanol, engine fuels and fresh water and a plant for carrying out said method | |
| CN217661593U (en) | Device for purifying and recovering carbon dioxide by low-temperature rectification | |
| CN217498681U (en) | Hydrogen energy recovery and purification device based on technology fusion in natural gas liquefaction process | |
| CN102093920A (en) | Petroleum associated gas recycling process | |
| CN102994180A (en) | Recovery process for petroleum associated gas | |
| JP2011231002A (en) | Method of collecting and liquefying carbon dioxide from mixed gas | |
| CN102051196A (en) | Skid-mounted bradenhead gas three-tower separation and recycling device and method | |
| CN112556312A (en) | Steam-driven air separation method and steam T-stage utilization system for same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |