CN202024572U - Natural gas feed gas processing device - Google Patents
Natural gas feed gas processing device Download PDFInfo
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- CN202024572U CN202024572U CN201120109622XU CN201120109622U CN202024572U CN 202024572 U CN202024572 U CN 202024572U CN 201120109622X U CN201120109622X U CN 201120109622XU CN 201120109622 U CN201120109622 U CN 201120109622U CN 202024572 U CN202024572 U CN 202024572U
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Abstract
The utility model provides a natural gas feed gas processing device, which includes a feed gas pre-separator, a compressing device, a refrigeration and separation device and a fractionation device, which are sequentially connected, and the processing device further includes a CNG (compressed natural gas) compressing device, wherein both the refrigeration and separation device and the fractionation device are provided with dry gas air outlet pipes; and the CNG compressing device is connected with the dry gas air outlet pipes of the refrigeration and separation device and the fractionation device. The processing device is particularly suitable for remote petroleum fields or sporadic oil gas wells, can process the natural gas not involved in a gathering pipeline network, greatly reduce the investment, and simultaneously reduce the operation energy consumption during the manufacturing process; the produced liquefied gas and stable light hydrocarbon can serve as chemical raw materials and industrial or domestic fuels; and the compressed natural gas can be delivered to cities and serves as fuels for natural-gas-fueled vehicles to replace petrol and diesel oil used in vehicles in the cities, so that the city environment is greatly cleaned, and the processing device has favorable economic and social benefits.
Description
Technical field
The utility model relates to a kind of natural gas _ raw material gas processing unit (plant), and described natural gas _ raw material gas can be associated gas, stabilization of crude oil gas, natural gas pool unstripped gas etc.
Background technology
Natural gas _ raw material gas particularly contains a large amount of C in the associated gas
3H
8And above valuable lighter hydrocarbons resource, generally this part resource has all obtained reclaiming and utilizing, and the dry gas through reclaiming lighter hydrocarbons enters collection transmission pipe network, and resource is fully utilized.
For the fragmentary oil gas well of oil gas field and the petroleum resources of outlying oil gas field, because tolerance is less, and scattered distribution, mostly well do not utilized, have to sometimes adopt torch to burn, avoid direct emptying to bring the discharging of greenhouse gases.
Generally contain saturation moisture, H in the associated gas
2S, CO
2Deng impurity, when reclaiming lighter hydrocarbons, need natural gas is carried out preliminary treatment, remove the impurity that wherein contains, satisfy the needs of safety in production and product standard, also need the impurity in the gas is removed for commercial natural gas production simultaneously.
Can process processing to associated gas and obtain LPG and NGL, perhaps obtain CNG.The term implication is as follows: LPG:Liquefied Petroleum Gas, that is, and liquefied petroleum gas; NGL:Natural Gas Liquids, that is, and natural gas liquids; CNG:Compressed Natural Gas, that is, and compressed natural gas.The LPG that reclaims for associated gas since impure less, the calorific value height, be the industry and the domestic fuel of high-quality, also can be used as valuable chemical industry materials; NGL is the industrial chemicals of high-quality, can be used as the gasoline concoction component after processing; The main component of CNG product is C
1H
4, C
2H
6Component is clean domestic fuel, particularly as the city vehicle fuel, contains SO hardly in its discharging tail gas
x, NO
xDeng pernicious gas, improved city atmospheric environment greatly, have good benefits in environment and social benefit.Make vehicle fuel with CNG in addition and compare with gasoline, its use cost also reduces about 50%, for the producer and ultimate consumer good economic benefit is arranged all.
At present, adopt LPG retracting device and CNG device to handle associated gas respectively.The former obtains LPG and NGL for passing through preliminary treatment, compression, refrigeration and fractionation successively; The latter removes impurity for through preliminary treatment, obtains CNG through overcompression then.Utilization is not well integrated in the use that is arranged of LPG retracting device and CNG device branch, makes plant area more, and cost is higher.
The utility model content
The purpose of this utility model provides the natural gas _ raw material gas processing unit (plant) of a kind of combined recovery LPG and CNG.
The natural gas _ raw material gas processing unit (plant) that the utility model provides, comprise the unstripped gas preseparator, compression set, refrigeration separator and the fractionating device that connect successively, also comprise the CNG compression set, described refrigeration separator and described fractionating device all are provided with the dry gas escape pipe, and described CNG compression set connects the dry gas escape pipe of described refrigeration separator and the dry gas escape pipe of described fractionating device.
Preferably, described refrigeration separator comprises refrigerating plant and the cold catch pot that is connected, and the dry gas escape pipe of described fractionating device connects described CNG compression set through described refrigerating plant.
More preferably, described refrigerating plant is divided into a plurality of refrigeration units, the dry gas escape pipe of described refrigerating plant is drawn and through the described CNG compression set of part or all of connection described a plurality of refrigeration units, the dry gas escape pipe of described fractionating device is through the described CNG compression set of part or all of connection in described a plurality of refrigeration units from described cold catch pot.
Described a plurality of refrigeration unit for example is shallow ice chest, evaporimeter (for example being ammonia evaporator) and the main ice chest that connects successively, the dry gas escape pipe of described refrigerating plant is connected described CNG compression set through described main ice chest with described shallow ice chest, and the dry gas escape pipe of described fractionating device connects described CNG compression set through described shallow ice chest.
Preferably, described fractionating device comprises dethanizer and the debutanizing tower that is connected, and the dry gas escape pipe of described fractionating device is drawn from described dethanizer.
More preferably, be provided with the deethanization bottom reboiler at the bottom of the tower of described dethanizer; The cat head of described debutanizing tower is connected with the overhead reflux pipeline, be disposed with debutanization cat head condenser, debutanization cat head return tank, debutanization cat head reflux pump and LPG carrier pipe on the described overhead reflux pipeline, be provided with the debutanization bottom reboiler at the bottom of the tower of described debutanizing tower, be connected with the NGL carrier pipe at the bottom of the tower of described debutanizing tower, described NGL carrier pipe is provided with the light oil cooler.
Preferably, described compression set is provided with Tube For Compressor Intercooler, compressor one-level exhaust tank, unstripped gas drying device, unstripped gas filter, compressor aftercooler and the compressor secondary exhaust tank that connects successively.
More preferably, the described unstripped gas drying device unstripped gas drier that is a plurality of parallel connections.
Preferably, described natural gas _ raw material gas processing unit (plant) is removable skid-mounted.
The utility model has carried out integrating layout with LPG and CNG retracting device, reduced and repeated to be provided with, improved the comprehensive utilization ratio of equipment, reduced cost, after natural gas _ raw material gas is handled through the utility model, obtain LPG, NGL and CNG product, can transport easily by the automobile means of transportation and dispatch from the factory, resource is fully used.The oil gas that the utility model is particularly conducive to oil gas field block newly developed, outlying block and fragmentary oil gas well makes full use of.Specifically, the utlity model has following advantage:
1, the petroleum gas resource be can rationally utilize, liquefied gas (LPG), stable light hydrocarbon (NGL) and compressed natural gas (CNG) product produced.
2, be particularly useful for outlying oil gas field, recycle, have good economic benefit and social benefit for the precious resources in can not inlet pipe net natural gas.
3, opereating specification is wide, operating flexibility is big, and the scale of seriation device is 0.15 * 10
4m
3/ d～10 * 10
4m
3/ d, operating flexibility 60～110%.
4, adopt skid-mounted to arrange, but integral moving when the resource exhaustion of somewhere, is moved to another area and is used the utilization rate height of device easily.
5, can reduce plant investment, reduction operation energy consumption.
6, adopt skid-mounted to arrange, equipment and pipeline are arranged compact, can save occupation of land, reduce investment.
7, the layout that is prefabricated in the factory reduces the field engineering amount, reduces the whole duration of engineering.
8, can reduce operation staffing, minimizing cost of labor.
9, preprocessing part comprises gas dehydration, acid gas removal body etc.; Refrigeration adopts external cooling technology.Produce LPG, NGL and CNG product.This device adopts external cooling technology, light hydrocarbon yield height.
10, can adopt the scheme that combines with manual control automatically, to guarantee the technological requirement of different occasions.
Description of drawings
Fig. 1 is the structural representation of natural gas _ raw material gas processing unit (plant) of the present utility model.
Among the figure: 001-LPG carrier pipe, 002-NGL carrier pipe, 101-unstripped gas preseparator, 102 compressor one-level exhaust tanks, 103-compressor secondary exhaust tank, 104-unstripped gas drier, the 105-cold catch pot, 106-debutanization cat head return tank, 201-Tube For Compressor Intercooler, 202-compressor aftercooler, the shallow ice chest of 203-, the 204-evaporimeter, 205-master's ice chest, 206-deethanization bottom reboiler, 207-debutanization bottom reboiler, 208-debutanization cat head condenser, 209-light oil cooler, 301-unstripped gas filter, the 401-dethanizer, the 402-debutanizing tower, 501-debutanization cat head reflux pump, 601-CNG compression set.
The specific embodiment
In general, natural gas _ raw material gas processing unit (plant) of the present utility model by pretreatment of raw material, compression, refrigeration, product fractionation, and dry gas compression etc. partly form, general device part is different according to scale and raw material composition, and preprocessing part comprises natural qi exhaustion H
2S (optional), take off CO
2(optional), dehydrate (essential); Refrigeration adopts the external cooling technology of ammonia refrigeration or propane refrigeration; The fractionation process of deethanization+debutanization is adopted in the product fractionation.
Also in conjunction with the accompanying drawings the utility model is further specified below by the specific embodiment.
As shown in Figure 1, the natural gas _ raw material gas processing unit (plant), comprise the unstripped gas preseparator 101 that connects successively, compression set (is provided with the Tube For Compressor Intercooler 201 that connects successively, compressor one-level exhaust tank 102, the unstripped gas drying device that is formed in parallel by three unstripped gas driers 104, unstripped gas filter 301, compressor aftercooler 202 and compressor secondary exhaust tank 103), the refrigeration separator (comprises by shallow ice chest 203, refrigerating plant and cold catch pot 105 that evaporimeter 204 and main ice chest 205 constitute) and fractionating device (dethanizer 401 and debutanizing tower 402), also comprise CNG compression set 601, the top of described cold catch pot 105 and described dethanizer 401 all is provided with the dry gas escape pipe that is connected described CNG compression set 601.The dry gas escape pipe on described cold catch pot 105 tops is connected described CNG compression set 601 through described main ice chest 205 with described shallow ice chest 203, and the dry gas escape pipe on the top of described dethanizer 401 connects described CNG compression set 601 through described shallow ice chest 203.Be provided with deethanization bottom reboiler 206 at the bottom of the tower of described dethanizer 401; The cat head of described debutanizing tower 402 is connected with the overhead reflux pipeline, be disposed with debutanization cat head condenser 208, debutanization cat head return tank 106, debutanization cat head reflux pump 501 and LPG carrier pipe 001 on the described overhead reflux pipeline, be provided with debutanization bottom reboiler 207 at the bottom of the tower of described debutanizing tower 402, be connected with NGL carrier pipe 002 at the bottom of the tower of described debutanizing tower 402, described NGL carrier pipe 002 is provided with light oil cooler 209.
The natural gas _ raw material gas processing unit (plant) is preferably removable skid-mounted setting.Scale can be 0.15 * 10
4m
3/ d～10 * 10
4m
3/ d.Typical case's scale for example is 0.15 * 10
4m
3/ d, 0.3 * 10
4m
3/ d, 0.5 * 10
4m
3/ d, 1.0 * 10
4m
3/ d, 2.0 * 10
4m
3/ d, 5.0 * 10
4m
3/ d, 10.0 * 10
4m
3/ d.
Described natural gas _ raw material gas processing unit (plant) can be processed processing to associated gas, stabilization of crude oil gas and natural gas pool unstripped gas etc., below process technology scheme is carried out simple declaration.
Unstripped gas is through unstripped gas preseparator 101, after separating a small amount of light oil of wherein carrying secretly, water (free water), mechanical admixture, gas enters the feed gas compressor first-stage cylinder and carries out the one-level compression, sewage drains into common sewer and concentrates outer failing, and light oil then is pumped in the stable light hydrocarbon product storage tank by light oil as the stable light hydrocarbon product.Unstripped gas enters Tube For Compressor Intercooler 201 and is cooled to 40 ℃ after the one-level compression, enters compressor one-level exhaust tank 102 again and carries out gas-liquid separation, and gas is through taking off H
2S, CO
2, enter the unstripped gas drier 104 that is provided with molecular sieve then and dewater.Dried natural gas via unstripped gas filter 301 filters out and enters the compressor secondary cylinder behind the molecular sieve dust and be compressed to 1.9MPa, compressed then machine secondary exhaust tank 103, be cooled to 40 ℃, enter shallow ice chest 203, evaporimeter 204 and main ice chest 205 and freeze behind a series of heat exchange and external cooling to-30 ℃, unstripped gas enters cold catch pot 105 and carries out gas-liquid separation.Dry gas enters CNG compression set 601 through main ice chest 205 and shallow ice chest 203, liquid hydrocarbon enters dethanizer 401, debutanizing tower 402 is separated into LPG and NGL, enter LPG carrier pipe 001 and NGL carrier pipe 002 respectively, dethanizer 401 level pressure power are controlled at 1.3MPa, 50 ℃ of tower top temperature-32 ℃, column bottom temperatures; Debutanization pressure 1.15MPa, 130 ℃ of tower top temperature-56 ℃, column bottom temperatures.The dry gas that dethanizer 401 cats head are discharged enters CNG compression set 601 through shallow ice chest 203.
For cold being provided for the unstripped gas system, this device has designed cooling cycle system, with ammonia or propane as refrigeration working medium.Product fractionation institute calorific requirement is provided by heat-conducting oil system.The dry gas of device is transported to CNG compression set 601 except that the personal fuel of this device, be compressed to 25.0MPa, as the export trade of CNG product loading.
Described natural gas _ raw material gas processing unit (plant) can adopt the scheme that combines with manual control automatically flexibly, to guarantee the technological requirement of different occasions.
A concrete application examples below by the described natural gas _ raw material gas processing unit (plant) that is provided with in a manner described illustrates its effect.The specification of the natural gas _ raw material gas processing unit (plant) in this application examples is 1.0 * 10
4m
3/ d.Unstripped gas is the associated gas in certain oil field, forms to see Table 1.
Table 1 unstripped gas is formed
| Form | N 2 | CO 2 | CH 4 | C 2H 6 | C 3H 8 | C 4H 10 | C 4H 10 | C 5H 12 | C 5H 12 | C 6H 14 + |
| Content (v%) | 0.33 | 0.86 | 57.51 | 6.30 | 18.69 | 2.91 | 6.24 | 1.58 | 1.39 | 4.19 |
The material balance of this natural gas _ raw material gas processing unit (plant) sees Table 2.
Table 2 material balance
| Sequence number | Name of material | Yield, % | Numerical value, t/a | Remarks |
| One | The side of going into | |||
| Associated gas | 100.00 | 4597 | 10000m 3/d | |
| Two | The side of going out | |||
| 1 | LPG | 39.15 | 1800 | |
| 2 | NGL | 18.03 | 828 | |
| 3 | CNG | 40.88 | 1872 | 5971m 3/d |
| 4 | Fuel | 1.96 | 90 |
LPG satisfies " oil gas field liquefied petroleum gas " (GB9052.1-1998) standard-required;
NGL satisfies " stable light hydrocarbon " (GB9053-1998) I light hydrocarbon product standard-required;
CNG satisfies " compressed natural gas used as vehicle fuel " GB18047 standard-required.
Compressing two covering devices with the lighter hydrocarbons recovery with scale conventional in the prior art with natural gas compares, the natural gas _ raw material gas processing unit (plant) floor space of above application examples reduces, construction investment reduces and the operation staffing all reduces, running cost reduces, economic benefit improves, and the investment payback time reduces greatly.
Claims (9)
1. natural gas _ raw material gas processing unit (plant), comprise the unstripped gas preseparator, compression set, refrigeration separator and the fractionating device that connect successively, it is characterized in that, also comprise the CNG compression set, described refrigeration separator and described fractionating device all are provided with the dry gas escape pipe, and described CNG compression set connects the dry gas escape pipe of described refrigeration separator and the dry gas escape pipe of described fractionating device.
2. natural gas _ raw material gas processing unit (plant) according to claim 1, it is characterized in that, described refrigeration separator comprises refrigerating plant and the cold catch pot that is connected, and the dry gas escape pipe of described fractionating device connects described CNG compression set through described refrigerating plant.
3. natural gas _ raw material gas processing unit (plant) according to claim 2, it is characterized in that, described refrigerating plant is divided into a plurality of refrigeration units, the dry gas escape pipe of described refrigerating plant is drawn and through the described CNG compression set of part or all of connection described a plurality of refrigeration units, the dry gas escape pipe of described fractionating device is through the described CNG compression set of part or all of connection in described a plurality of refrigeration units from described cold catch pot.
4. natural gas _ raw material gas processing unit (plant) according to claim 3, it is characterized in that, described a plurality of refrigeration unit is shallow ice chest, evaporimeter and the main ice chest that connects successively, the dry gas escape pipe of described refrigerating plant is connected described CNG compression set through described main ice chest with described shallow ice chest, and the dry gas escape pipe of described fractionating device connects described CNG compression set through described shallow ice chest.
5. natural gas _ raw material gas processing unit (plant) according to claim 1 is characterized in that, described fractionating device comprises dethanizer and the debutanizing tower that is connected, and the dry gas escape pipe of described fractionating device is drawn from described dethanizer.
6. natural gas _ raw material gas processing unit (plant) according to claim 5 is characterized in that, is provided with the deethanization bottom reboiler at the bottom of the tower of described dethanizer; The cat head of described debutanizing tower is connected with the overhead reflux pipeline, be disposed with debutanization cat head condenser, debutanization cat head return tank, debutanization cat head reflux pump and LPG carrier pipe on the described overhead reflux pipeline, be provided with the debutanization bottom reboiler at the bottom of the tower of described debutanizing tower, be connected with the NGL carrier pipe at the bottom of the tower of described debutanizing tower, described NGL carrier pipe is provided with the light oil cooler.
7. natural gas _ raw material gas processing unit (plant) according to claim 1, it is characterized in that described compression set is provided with Tube For Compressor Intercooler, compressor one-level exhaust tank, unstripped gas drying device, unstripped gas filter, compressor aftercooler and the compressor secondary exhaust tank that connects successively.
8. natural gas _ raw material gas processing unit (plant) according to claim 7 is characterized in that, the unstripped gas drier that described unstripped gas drying device is a plurality of parallel connections.
9. natural gas _ raw material gas processing unit (plant) according to claim 1 is characterized in that, described natural gas _ raw material gas processing unit (plant) is removable skid-mounted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120109622XU CN202024572U (en) | 2011-04-14 | 2011-04-14 | Natural gas feed gas processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120109622XU CN202024572U (en) | 2011-04-14 | 2011-04-14 | Natural gas feed gas processing device |
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| Publication Number | Publication Date |
|---|---|
| CN202024572U true CN202024572U (en) | 2011-11-02 |
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|---|---|---|---|
| CN201120109622XU Expired - Fee Related CN202024572U (en) | 2011-04-14 | 2011-04-14 | Natural gas feed gas processing device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168905A (en) * | 2011-04-14 | 2011-08-31 | 北京中油联自动化技术开发有限公司 | Feed gas processing device for natural gas |
| CN103233716A (en) * | 2013-05-17 | 2013-08-07 | 徐毅 | Mobile coalbed methane extraction device |
| CN103256785A (en) * | 2013-05-17 | 2013-08-21 | 徐毅 | Mobile coal bed gas purifying and liquefying device |
| CN104019627A (en) * | 2014-05-06 | 2014-09-03 | 上海安恩吉新能源技术有限公司 | Moving small-size skid-mounted LNG liquefying device |
| CN117072865A (en) * | 2023-10-17 | 2023-11-17 | 太原科技大学 | Gas storage device for coal bed gas exploitation |
-
2011
- 2011-04-14 CN CN201120109622XU patent/CN202024572U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168905A (en) * | 2011-04-14 | 2011-08-31 | 北京中油联自动化技术开发有限公司 | Feed gas processing device for natural gas |
| CN102168905B (en) * | 2011-04-14 | 2014-03-05 | 北京中油联自动化技术开发有限公司 | Feed gas processing device for natural gas |
| CN103233716A (en) * | 2013-05-17 | 2013-08-07 | 徐毅 | Mobile coalbed methane extraction device |
| CN103256785A (en) * | 2013-05-17 | 2013-08-21 | 徐毅 | Mobile coal bed gas purifying and liquefying device |
| CN103256785B (en) * | 2013-05-17 | 2017-08-11 | 徐毅 | A kind of portable coal bed gas purifying and liquefying device |
| CN104019627A (en) * | 2014-05-06 | 2014-09-03 | 上海安恩吉新能源技术有限公司 | Moving small-size skid-mounted LNG liquefying device |
| CN117072865A (en) * | 2023-10-17 | 2023-11-17 | 太原科技大学 | Gas storage device for coal bed gas exploitation |
| CN117072865B (en) * | 2023-10-17 | 2023-12-19 | 太原科技大学 | Gas storage device for coal bed gas exploitation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111102 Termination date: 20140414 |