CN219772060U - Device for dehydrating oilfield associated gas and recycling hydrocarbon condensate - Google Patents
Device for dehydrating oilfield associated gas and recycling hydrocarbon condensate Download PDFInfo
- Publication number
- CN219772060U CN219772060U CN202320770565.2U CN202320770565U CN219772060U CN 219772060 U CN219772060 U CN 219772060U CN 202320770565 U CN202320770565 U CN 202320770565U CN 219772060 U CN219772060 U CN 219772060U
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- gas
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- heat exchanger
- liquid separator
- pipe heat
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- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 32
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 32
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 32
- 238000004064 recycling Methods 0.000 title abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 75
- 238000004804 winding Methods 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000011084 recovery Methods 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims 1
- 238000006297 dehydration reaction Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 7
- 239000003921 oil Substances 0.000 description 6
- 239000000499 gel Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model relates to a device for dehydrating and recycling hydrocarbon condensate from oilfield associated gas, which comprises an associated gas compressor, an air cooler, a front-stage winding pipe heat exchanger, a front-stage gas-liquid separator, a rear-stage winding pipe heat exchanger, a rear-stage gas-liquid separator and a throttle expansion valve, wherein the associated gas compressor is communicated to a pipeline for conveying oilfield associated gas, the air cooler is arranged between the associated gas compressor and the front-stage winding pipe heat exchanger, the front-stage gas-liquid separator, the rear-stage winding pipe heat exchanger and the rear-stage gas-liquid separator are sequentially communicated, the throttle expansion valve is arranged between a gas outlet of the rear-stage gas-liquid separator and the rear-stage winding pipe heat exchanger, the volume of dry gas is reduced under the action of the throttle expansion valve, the temperature of the dry gas is further reduced, low-temperature dry gas flows back to the rear-stage winding pipe heat exchanger and the front-stage winding pipe heat exchanger, the cold quantity of the dry gas is secondarily utilized, and the cold quantity of the dry gas can be separated out respectively, and the cold quantity of the dry gas can be fully utilized.
Description
Technical Field
The utility model relates to the technical fields of cooling recovery and the like, in particular to a device for dehydrating oilfield associated gas and recovering hydrocarbon condensate.
Background
When the oil pipe of oil field is in carrying crude oil, can produce associated gas along with the change of intraductal atmospheric pressure, along with oil pipe extension, crude oil transportation's in-process associated gas's temperature reduces gradually, and moisture and heavy hydrocarbon in the associated gas separate out gradually, form liquid, solid-state water and hydrocarbon condensate etc. and condensate and ice can reduce gas transmission pipeline's circulation ability, depend on the pipe wall for a long time, can cause the jam even to pipeline, valve, instrument etc. influence gas transmission pipeline's safe operation. Therefore, a device for dehydrating and recycling the oilfield associated gas is required to be arranged on the oil conveying pipe of the oilfield, and hydrocarbon condensate is separated after the oilfield associated gas is cooled in the prior art, so that the recycling efficiency is low, and the cold energy waste of a cold source is serious.
Disclosure of Invention
The utility model aims to solve the technical problems that: the oilfield associated gas in the prior art has low efficiency in cooling and separating hydrocarbon components and serious waste of cold energy
The technical scheme adopted for solving the technical problems is as follows: the device comprises an associated gas compressor, an air cooler, a front-stage winding pipe heat exchanger, a front-stage gas-liquid separator, a rear-stage winding pipe heat exchanger, a rear-stage gas-liquid separator and a throttle expansion valve, wherein the associated gas compressor is communicated to a pipeline for conveying associated gas of an oil field, the air cooler is arranged between the associated gas compressor and the front-stage winding pipe heat exchanger, the front-stage gas-liquid separator, the rear-stage winding pipe heat exchanger and the rear-stage gas-liquid separator are sequentially communicated, a gas outlet of the rear-stage gas-liquid separator is communicated to the rear-stage winding pipe heat exchanger and the front-stage winding pipe heat exchanger, and the throttle expansion valve is arranged between a gas outlet of the rear-stage gas-liquid separator and the rear-stage winding pipe heat exchanger.
Further, the device also comprises an oil-water two-phase separator, the front-stage gas-liquid separator and the rear-stage gas-liquid separator are both communicated to the oil-water two-phase separator, and the liquid discharged from the front-stage gas-liquid separator and the rear-stage gas-liquid separator is separated in the oil-water two-phase separator.
Further, the rear-stage gas-liquid separator is further communicated to the rear-stage winding pipe heat exchanger, and the throttle expansion valve is arranged on the rear-stage gas-liquid separator and the rear-stage winding pipe heat exchanger.
Further, the back-stage winding pipe heat exchanger is further communicated to the front-stage winding pipe heat exchanger, and the back-stage gas-liquid separator is communicated with the front-stage winding pipe heat exchanger through the back-stage winding pipe heat exchanger.
Further, the oil-water two-phase separator is a centrifugal separator.
Furthermore, the input pipe and the output pipe of the associated gas compressor can be communicated to the conveying pipeline of the oilfield associated gas.
Further, the output pipe orifice of the front-stage gas-liquid separator is communicated with the oil-water two-phase separator, and the other output pipe orifice of the front-stage gas-liquid separator is communicated with the front-stage rear-stage winding pipe heat exchanger.
The utility model has the advantages that the air cooler cools the oilfield associated gas pressurized by the compressor to form low-temperature high-pressure oilfield associated gas, after the dry gas in the oilfield associated gas is discharged from the later-stage gas-liquid separator, the temperature of the dry gas is reduced to a lower temperature through the expansion of the throttling expansion valve, and the dry gas is also transmitted to the later-stage winding pipe heat exchanger and the earlier-stage winding pipe heat exchanger, so that heat exchange occurs between the dry gas and the oilfield associated gas in the heat exchanger, the cold quantity of the dry gas can be recovered, the separation and recovery efficiency of the oilfield associated gas is improved, and the waste of the cold quantity is reduced.
Drawings
The utility model will be further described with reference to the drawings and examples.
FIG. 1 is a component flow diagram of an apparatus for dewatering and recovering hydrocarbon gels from oilfield associated gas in accordance with the present utility model;
in the figure: the device 100 for dehydrating and recovering hydrocarbon gel from oilfield associated gas, an associated gas compressor 10, an air cooler 20, a front-stage winding pipe heat exchanger 30, a front-stage gas-liquid separator 40, an oil-water two-phase separator 50, a rear-stage winding pipe heat exchanger 60, a rear-stage gas-liquid separator 70 and a throttle expansion valve 710.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. On the contrary, the embodiments of the utility model include all alternatives, modifications and equivalents as may be included within the spirit and scope of the appended claims.
As shown in fig. 1, an apparatus 100 for dehydrating and recovering hydrocarbon gel from oilfield associated gas is connected to a pipeline containing oilfield associated gas, and the apparatus 100 comprises an associated gas compressor 10, an air cooler 20, a pre-stage coiled tube heat exchanger 30, a pre-stage gas-liquid separator 40, an oil-water two-phase separator 50, a post-stage coiled tube heat exchanger 60 and a post-stage gas-liquid separator 70.
The associated gas compressor 10 is fixedly arranged on a conveying pipeline of oilfield associated gas, an input pipe and an output pipe of the associated gas compressor 10 are both communicated to the conveying pipeline, after the associated gas compressor 10 is started, the associated gas in an oil field can be pumped out by utilizing the conveying pipeline, meanwhile, the associated gas compressor 10 can improve the pressure of the pipeline for conveying oilfield associated gas, preferably, normal-temperature oilfield associated gas with normal pressure of 0 to 0.6Mpa can be pressurized to 2.0 to 4.0Mpa through the compressor 10, and meanwhile, the temperature in oilfield associated gas is increased.
The air cooler 20 is arranged on a conveying pipeline of the oilfield associated gas, the air cooler 20 is communicated with an output pipe of the associated gas compressor 10 through the conveying pipeline, the associated gas compressor 10 pressurizes and heats the oilfield associated gas and then conveys the oilfield associated gas to the air cooler 20, and the temperature of the oilfield associated gas is lowered to normal temperature under the cooling effect of the air cooler 20.
The pre-stage winding pipe heat exchanger 30 is communicated with the air cooler 20 through a conveying pipeline, oilfield associated gas cooled to normal temperature in the air cooler 20 enters the pre-stage winding pipe heat exchanger 30 along with the conveying pipeline, the temperature of the associated gas in the pre-stage winding pipe heat exchanger 30 is reduced to between 0 and 3 ℃, and water and part of heavy hydrocarbon components in the oilfield associated gas are separated out when meeting cold, so that a gas-liquid mixture is formed.
The input pipe orifice of the front-stage gas-liquid separator 40 is communicated with the front-stage winding pipe heat exchanger 30 through a conveying pipeline, the gas-liquid mixture enters the front-stage gas-liquid separator 40 through the conveying pipeline, the gas-liquid mixture is separated in the front-stage gas-liquid separator 40, the output pipe orifice of the front-stage gas-liquid separator 40 is communicated with the oil-water two-phase separator 50 and the rear-stage winding pipe heat exchanger 60, liquid enters the oil-water two-phase separator 50 from the bottom of the front-stage gas-liquid separator 40, and gas escapes from the top of the gas-liquid separator 40 to the rear-stage winding pipe heat exchanger 60.
The oil-water two-phase separator 50 is preferably a liquid separator with a centrifugal structure, and after the liquid output from the bottom of the pre-stage gas-liquid separator 40 enters the oil-water two-phase separator 50, heavy hydrocarbon and water are separated and collected into different collecting vessels through different centrifugal acceleration.
The rear-stage coiled tube heat exchanger 60 is connected to the rear-stage gas-liquid separator 70, the middle of the rear-stage coiled tube heat exchanger 60 cools the gas discharged from the front-stage gas-liquid separator 40, the gas entering the rear-stage coiled tube heat exchanger 60 is cooled to below-15 ℃ to form a gas-liquid mixture, the gas-liquid mixture and associated gas enter the rear-stage gas-liquid separator 70, and the gas-liquid mixture is separated in the gas-liquid separator 70.
The associated gas and gas-liquid mixture in the post-stage gas-liquid separator 70 are separated and mainly separated into hydrocarbon condensate and low-temperature gas phase, wherein the hydrocarbon condensate is condensed below the post-stage gas-liquid separator 70, the hydrocarbon condensate flows back into the post-stage coiled pipe heat exchanger 60 from the bottom of the post-stage gas-liquid separator 70, and the low-temperature gas phase is discharged from the top of the post-stage gas-liquid separator 70.
The hydrocarbon condensate flows into the rear-stage coiled pipe heat exchanger 60 from the bottom of the rear-stage gas-liquid separator 70, generates cold energy as a cold source in the rear-stage coiled pipe heat exchanger 60, exchanges heat with the gas from the front-stage gas-liquid separator 40, thereby cooling the associated gas, and the hydrocarbon condensate as a cold source in the rear-stage coiled pipe heat exchanger 60 and the cooled hydrocarbon condensate flow into the oil-water two-phase separator 50 after cooling, and the water and the hydrocarbon condensate are centrifugally separated in the oil-water two-phase separator 50.
Part of the gas in the rear-stage gas-liquid separator 70 sequentially enters the rear-stage winding tube heat exchanger 60 and the front-stage winding tube heat exchanger 30 as dry gas, is heated to normal temperature in the two heat exchangers and then enters a user for direct combustion, while the other part of the gas is cooled by the rear-stage winding tube heat exchanger 60 and the front-stage winding tube heat exchanger 30 and then flows back to the associated gas compressor 10 again to participate in the cooling recovery process of the oilfield associated gas again. The pipeline of the subsequent-stage gas-liquid separator 70, which flows back to the associated gas compressor 10, is provided with a throttling expansion valve 710, the throttling expansion valve 710 expands the gas flowing back to the associated gas compressor 10, the pipeline pressure is throttled and depressurized from 2.0 to 4.0Mpa to be lower than 0.6Mpa, when the pressure of the gas is reduced, the temperature of the gas is reduced to be lower than minus 25 ℃, and after the pressure and the temperature of the gas reach the standards, the gas enters the subsequent-stage winding pipe heat exchanger 60 and the preceding-stage winding pipe heat exchanger 30 to be heated, and finally flows back to the associated gas compressor 10.
The method for using the device 100 for dehydrating and recovering hydrocarbon gel from oilfield associated gas includes connecting the associated gas compressor 10 to an associated gas pipeline of an oilfield, pressurizing and sucking associated gas in the oilfield pipeline by the associated gas compressor 10, driving the associated gas in the associated gas pipeline to be sucked into the air cooler 20, cooling the associated gas in the air cooler 20, cooling the associated gas to normal temperature, entering the front-stage winding pipe heat exchanger 30, primarily cooling the associated gas in the oilfield in the front-stage winding pipe heat exchanger 30 to form a mixed solution of the associated gas, hydrocarbon condensate and water, entering the front-stage gas-liquid separator 40 along a conveying pipeline, separating the gas from the mixed solution in the front-stage gas-liquid separator 40, entering the rear-stage winding pipe heat exchanger 60 by the associated gas and the hydrocarbon condensate, entering the oil-water two-phase separator 50, separating the water and the hydrocarbon condensate from each other and storing the associated gas in a corresponding storage device respectively, entering the rear-stage winding pipe heat exchanger 60, further entering the associated gas and the rear-stage heat exchanger 60 by the hydrocarbon condensate and further entering the rear-stage heat exchanger 60, further entering the air-stage heat exchanger 60, and further entering the air-recovering gas-liquid separator 70, and further entering the air-phase separator 70, and further cooling the air-recovering the associated gas by the combined gas from the air-separator, and the combined heat-recovering the air-separator and the combined gas from the air-separator and the air-recovering device.
The technical effects of the embodiment are as follows: with the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.
Claims (7)
1. The utility model provides a device of oil field associated gas dehydration and recovery hydrocarbon condensate which characterized in that: the device comprises an associated gas compressor, an air cooler, a front-stage winding pipe heat exchanger, a front-stage gas-liquid separator, a rear-stage winding pipe heat exchanger, a rear-stage gas-liquid separator and a throttle expansion valve, wherein the associated gas compressor is communicated to a pipeline for conveying oilfield associated gas, the air cooler is arranged between the associated gas compressor and the front-stage winding pipe heat exchanger, the front-stage gas-liquid separator, the rear-stage winding pipe heat exchanger and the rear-stage gas-liquid separator are sequentially communicated, a gas outlet of the rear-stage gas-liquid separator is communicated to the rear-stage winding pipe heat exchanger and the front-stage winding pipe heat exchanger, and the throttle expansion valve is arranged between a gas outlet of the rear-stage gas-liquid separator and the rear-stage winding pipe heat exchanger.
2. The apparatus for dewatering and recovering hydrocarbon condensate from oilfield associated gas of claim 1, wherein: the device also comprises an oil-water two-phase separator, wherein the front-stage gas-liquid separator and the rear-stage gas-liquid separator are both communicated to the oil-water two-phase separator, and liquid discharged from the front-stage gas-liquid separator and the rear-stage gas-liquid separator is separated in the oil-water two-phase separator.
3. The apparatus for dewatering and recovering hydrocarbon condensate from oilfield associated gas of claim 1, wherein: the rear-stage gas-liquid separator is also communicated with the rear-stage winding pipe heat exchanger, and the throttle expansion valve is arranged on the rear-stage gas-liquid separator and the rear-stage winding pipe heat exchanger.
4. A device for dewatering and recovering hydrocarbon condensate from oilfield associated gas as defined in claim 3, wherein: the back-stage winding pipe heat exchanger is also communicated with the front-stage winding pipe heat exchanger, and the back-stage gas-liquid separator is communicated with the front-stage winding pipe heat exchanger through the back-stage winding pipe heat exchanger.
5. The apparatus for dewatering and recovering hydrocarbon condensate from oilfield associated gas of claim 2, wherein: the oil-water two-phase separator is a centrifugal separator.
6. The apparatus for dewatering and recovering hydrocarbon condensate from oilfield associated gas of claim 1, wherein: the input pipe and the output pipe of the associated gas compressor can be communicated to the conveying pipeline of the oilfield associated gas.
7. The apparatus for dewatering and recovering hydrocarbon condensate from oilfield associated gas of claim 5, wherein: and the output pipe orifice of the front-stage gas-liquid separator is communicated with the oil-water two-phase separator, and the other output pipe orifice of the front-stage gas-liquid separator is communicated with the front-stage rear-stage winding pipe heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320770565.2U CN219772060U (en) | 2023-04-10 | 2023-04-10 | Device for dehydrating oilfield associated gas and recycling hydrocarbon condensate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320770565.2U CN219772060U (en) | 2023-04-10 | 2023-04-10 | Device for dehydrating oilfield associated gas and recycling hydrocarbon condensate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219772060U true CN219772060U (en) | 2023-09-29 |
Family
ID=88103136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320770565.2U Active CN219772060U (en) | 2023-04-10 | 2023-04-10 | Device for dehydrating oilfield associated gas and recycling hydrocarbon condensate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219772060U (en) |
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2023
- 2023-04-10 CN CN202320770565.2U patent/CN219772060U/en active Active
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