CN202912906U - Skid-mounted type natural gas purifying and recycling device - Google Patents
Skid-mounted type natural gas purifying and recycling device Download PDFInfo
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- CN202912906U CN202912906U CN 201220546252 CN201220546252U CN202912906U CN 202912906 U CN202912906 U CN 202912906U CN 201220546252 CN201220546252 CN 201220546252 CN 201220546252 U CN201220546252 U CN 201220546252U CN 202912906 U CN202912906 U CN 202912906U
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Abstract
The utility model discloses a skid-mounted type natural gas purifying and recycling device. The device comprises a purifying unit and a recycling unit, wherein the purifying unit comprises a filter separator, a film separator, a regeneration heater, a devulcanizer and a dryer; the recycling unit comprises an absorption tower, a regeneration tower, a cold box, an LNG (Liquefied Natural Gas) storage tank, a light hydrocarbon storage tank and a condensate oil storage tank; the gas outlet of the dryer is connected with the inlet of the absorption tower through a pipeline. The device further comprises a fuel cell, wherein the inlet of a raw material of the fuel cell is connected with the gas outlet of the absorption tower through a pipeline; and the exhaust gas outlet of the fuel cell is connected with the regeneration heater through a pipeline. According to the device, a part of absorbed natural gas rich in methane is used for fuel cell power generation to supply power to electric equipment in the device, and the problem that the natural gas in small oil-gas fields of marginal areas cannot be recycled is solved. The device is simple in structure, less in investment, low in operating expense and energy consumption, high in light hydrocarbon recycling rate and high in product yield and purity.
Description
Technical field
The utility model relates to a kind of integrated natural gas treating apparatus, particularly relates to a kind of frontier area sledge-borne type natural gas conditioning recycle device.
Background technology
Sweet natural gas and coal, oil also are called three large pillars of world's primary energy source.Sweet natural gas refers under the earth's surface hydro carbons and non-hydrocarbons mixture born in the pore formation, normal with crude oil association be in the same place, take methane as main, and comprise hydro carbons than the methane weight: such as ethane, propane, normal butane, Trimethylmethane, Skellysolve A, iso-pentane etc.Except hydrocarbon, also may there be the gases such as a small amount of moisture, nitrogen, carbonic acid gas, hydrogen sulfide, oxygen, argon.Sweet natural gas has widely purposes, can be used as industrial chemicals and various fuel.
Oil-gas field side area natural gas source can be divided into oil field emptying natural gas, associated gas and gas stringer Sweet natural gas.Associated gas, mainly the form with well head separation gas, Volatile Gas in Oil Tank and stabilization of crude oil gas exists; The gas stringer Sweet natural gas refers to that tolerance is less than 0.5 ten thousand m
3The low pressure gas gas well gas of/d.The long-term closing well of gas stringer can not form the oil-gas field production capacity, and oil field emptying natural gas emptying is burnt, and has not only greatly wasted resource, and severe contamination the atmosphere of field area.By the statistics in the end of the year 2000, (geologic reserve is greater than 10,000,000,000 m for China's middle-large gas field
3) 56, accounting for 13. 4% of national gas field sum, all the other gas fields of 86. 6% are small-sized gas field.For reserves less scattered gas field and the higher marginal gas field of cost of winning, because the pipeline transportation cost of long distance is higher, industrial scale is uneconomical, does not possess the condition of the market for natural gas of entering.The amount of natural gas in these gas fields does not satisfy again the liquefaction scale of big-and-middle-sized natural gas liquefaction device simultaneously.For this reason, the scattered gas field of China and outlying gas field Sweet natural gas can not get exploitation for a long time.According to statistics, China has 1,600,000,000 m every year approximately
3Oil field emptying natural gas emptying is burnt.Therefore, economical, reasonably develop the side area natural gas source, changes resource is production capacity, reduces the field area topsoil, has become the industrial problem anxious to be resolved of development China's natural gas.
The comprehensive utilization of oil-gas field side area natural gas source is different from large gas utilization, must be based on disperseing internal market and the neighboring markets of well, block of cells well (or working district), tolerance and temperament characteristics according to natural gas source, adopt that treatment capacity is little, less investment and the large sledge-borne type local use technology of turndown ratio, oil-gas field is implemented rolling development.
The recovery method of a patent CN02132979.6 light hydrocarbon in natural gas, this patent adopt the shallow cold and oily absorption technique of Sweet natural gas to combine to reach the effect that improves light hydrocarbon recovery rate.But it is not suitable for the recycling of edge natural gas in oil and gas fields.Patent CN03134159.4 small-sized sledge dress Sweet natural gas methods of light hydrocarbon recovery, natural gas via overdraft, cooling, absorption, stable rear separable recovery dry gas, liquefied gas, lighter hydrocarbons and hydrocarbon mixture product, the Sweet natural gas recovering effect is good, but plant energy consumption is high, C
2, C
3The rate of recovery not high.
At present, natural gas in oil and gas fields recovery utilization rate in edge is very low.In the prior art, the device of propane in the shallow cold recovery Sweet natural gas, its propane yield is generally 60%～80%; Reclaiming ethane is main device, and the yield of ethane is generally 85%.Therefore, by optimizing operation parameters, change refrigerating method, apply the method such as new technology, it is very necessary to improve light hydrocarbon recovery rate.Simultaneously, select optimum recovery measure according to combined factors such as the makings composition of natural gas in oil and gas fields, output, the reduce Financial cost obtains best economic benefit.
The utility model content
For deficiency of the prior art, the utility model provides a kind of edge natural gas in oil and gas fields purification recovery device, the advantage such as that this device has is safe and reliable, equipment is simple, process cost is low.
The utility model provides a kind of sledge-borne type natural gas conditioning retrieving arrangement, comprise clean unit and recovery unit, wherein, clean unit comprises filter separator, membrane separation apparatus, regenerative heater, digester and moisture eliminator, recovery unit comprises the absorption tower, regenerator column, ice chest, the LNG storage tank, light hydrocarbon storage tank and condensate oil storage tank, the clean gas outlet of described membrane separation apparatus is divided into two-way, one the tunnel links to each other with the moisture eliminator entrance, another road is connected with the moisture eliminator entrance by behind the regenerative heater, the pneumatic outlet of moisture eliminator is connected with the entrance on absorption tower by pipeline, it is characterized in that: described device also comprises fuel cell, the feed(raw material)inlet of fuel cell is connected with the absorption tower pneumatic outlet by pipeline, and the tail gas outlet of fuel cell is connected with regenerative heater by pipeline.
In the device described in the utility model, described filter separator can adopt horizontal or vertical, and Stainless Steel Cloth is set in the filter separator, removes mechanical impurity and supersaturation water steam in the raw natural gas.Membrane separation apparatus adopts the organic membrane separation assembly, can adopt the in parallel or series connection of a plurality of membrane separation assemblies.Filling hydrogen sulfide desulphurization agent in the described digester, sweetening agent can be selected the metallic compounds such as iron, zinc, aluminium, and digester can be 2～4, can parallel connection also can connect between the digester.Sweetening agent in the digester can directly change hydrogen sulfide into sulphur.Described moisture eliminator is at least two, connects with parallel way between the moisture eliminator, and one is used for the Adsorption Natural Gas dehydration, and one is used for regeneration.The unstripped gas of moisture eliminator regenerating medium after for heating, regeneration passes into moisture eliminator to be regenerated with unstripped gas through behind the tail gas heating to 200 of fuel cell ℃～300 ℃, and the unstripped gas after the regeneration enters after cooling and isolates the supersaturation water steam in the filter separator.Sorbent material in the moisture eliminator can adopt silica gel, activated alumina, molecular sieve etc.Gas dew point behind the natural gas via super-dry device adsorption dewatering reaches-60 ℃, even lower.In the device described in the utility model, described light hydrocarbon storage tank top exit links to each other with absorption tower middle feed entrance by the road.
In the device described in the utility model, the Sweet natural gas that is rich in methane after the absorption divides two portions, wherein 5%～20% sends into the Solid Oxide Fuel Cell combustion power generation, is used for the power supply of device consumer, and rest part is sent into the LNG storage tank.In this device, Sweet natural gas absorbs and adopts low temperature absorption, the band press operation, and absorption temperature is controlled at 5～15 ℃, absorbs the oily condensate oil that adopts in the Sweet natural gas, and packing tower is adopted on the absorption tower, and the theoretical tower tray number on absorption tower is 3～12, preferred 5～8.Rich absorbent oil is regenerated in regenerator column, and described regenerator column adopts packing tower, and the theoretical tower tray number of regenerator column is 5～12, preferred 6～10.
In the device described in the utility model, other technology contents is the known contents of those skilled in the art such as water cooler, well heater, oil pump, absorption tower, regenerator column, ice chest and Refrigeration Technique etc.
Light hydrocarbon in natural gas retrieving arrangement described in the utility model has the following advantages: but sledge-borne type light hydrocarbon in natural gas retrieving arrangement described in the utility model be a kind of safe and reliable, equipment is simple, process cost low sledge dressization and be applicable to backwoodsman Sweet natural gas recovery and utilization technology, raw natural gas adopts the technical combinations such as membrane sepn, sorbent material dehydration and sweetening agent recovery sulphur, Solid Oxide Fuel Cell, to the good purification of Sweet natural gas, and be suitable for the recycling of edge natural gas in oil and gas fields.Improved the product economy added value, met the need of market.
Description of drawings
Fig. 1 is sledge-borne type light hydrocarbon in natural gas retrieving arrangement synoptic diagram described in the utility model.
Embodiment
Below in conjunction with accompanying drawing sledge-borne type light hydrocarbon in natural gas retrieving arrangement described in the utility model is described further.
Embodiment 1
The utility model provides a kind of sledge-borne type natural gas conditioning retrieving arrangement, comprise clean unit and recovery unit, clean unit comprises filter separator 2, membrane separation apparatus 4, digester 6 and moisture eliminator 9, recovery unit comprises absorption tower 12, regenerator column 21, ice chest 14, LNG storage tank 15, light hydrocarbon storage tank 26 and condensate oil storage tank 24, described device also comprises Solid Oxide Fuel Cell 13, wherein, unstripped gas is connected with filter separator 2 centre entrances through inlet pipe 1, the outlet of filter separator 2 tops links to each other with membrane separation apparatus 4 by pipeline 28, the clean gas outlet of membrane separation apparatus 4 links to each other with moisture eliminator 9 entrances by pipeline 8 one tunnel, are connected entrance with regenerative heater 10 successively and are connected in another road with moisture eliminator, the outlet of membrane separation apparatus 4 sour gas is connected with digester 6 by pipeline 5, moisture eliminator 9 pneumatic outlets link to each other with absorption tower 12 entrances by pipeline 30, absorption tower 12 pneumatic outlets are connected with Solid Oxide Fuel Cell 13 by pipeline 31 one tunnel, are connected with the LNG storage tank with ice chest 14 successively and are connected in another road, fuel cell 13 tail gas outlets by pipeline 17 successively with regenerative heater 10, rich oil well heater 23 connects, absorption tower 12 tower bottom outlets by pipeline 32 successively with rich oil pump 18, poor oil-rich heat exchanger 19 is connected connection with regenerator column, regenerator column 21 pneumatic outlets are connected with light hydrocarbon storage tank with ice chest 14 successively by pipeline 25 and are connected, light hydrocarbon storage tank 26 pneumatic outlets are connected with absorption tower 12 centre entrances by pipeline 27, regenerator column 21 tower bottom outlets link to each other with condensate oil storage tank 24 with rich oil pump 22 by pipeline 33 one tunnel, one the tunnel successively with rich oil pump 22, lean and fat oil heat exchange 19, oil-poor water cooler 20 links to each other with absorption tower 12 upper entrances, another road successively with rich oil pump 22, reflux inlet links to each other at the bottom of rich oil well heater 23 and regenerator column 21 towers.
Sledge-borne type natural gas conditioning retrieving arrangement described in the utility model in use, unstripped gas enters filter separator 2 through inlet pipe 1, filtering separation removes mechanical impurity and supersaturation liquid is discharged by filter separator lower pipelines 3, then unstripped gas enters membrane separation apparatus 4 through pipeline 28, the sour gas that sees through film enters digester 6 through pipeline 5 and carries out desulfurization, gas after the desulfurization is discharged through pipeline 7, natural gas via clean gas outlet pipeline 8 one tunnel after the purification enters moisture eliminator 9A and deviates from wherein moisture, after moisture eliminator 9A water separation capability descends, use moisture eliminator 9B instead and carry out drying, then with the Sweet natural gas after regenerative heater 10 heat exchange by moisture eliminator 9A in to its adsorption dewatering of regenerating, gas after the regeneration absorption can enter filter separator 2 separating and dehydratings after pipeline 29 is by 11 coolings of regeneration water cooler, the dried natural gas via pipeline 30 of drying device 9A enters absorption tower 12, in absorption tower 12 with absorption agent counter current contact mass transfer, with the C in the raw natural gas
2, C
3And C
3 +Component absorbs, and is rich in C in the Sweet natural gas after being absorbed
1, contain simultaneously part C
2, C
3Component and a small amount of C
3 +Component.Sweet natural gas after process on absorption tower 12 enters LNG storage tank 15 through pipeline 31 one tunnel through ice chest 14 by the absorption tower pneumatic outlet, another road enters Solid Oxide Fuel Cell 13, be converted into electric energy 16 through combustion reactions, in fuel cell, be converted into electric energy through combustion reactions, the electric energy that obtains is used for the power supply of device consumer, the exhaust temperature of burning is greater than 300 ℃, by entering absorption tower 12 after regenerative heater 10 and 23 heat exchange of rich oil well heater, absorption tower 12 bottom streams are through rich oil pump 18, enter regenerator column 21 after poor oil-rich heat exchanger 19 heat exchange, regenerator column 21 top gaseous phase effluents are mainly contained C after ice chest 14 coolings
2, C
3And C
4The lighter hydrocarbons of component, enter light hydrocarbon storage tank 26, the not solidifying oil gas in light hydrocarbon storage tank 26 tops enters absorption tower 12 middle feed entrances through pipeline 27, regenerator column 21 bottom streams one tunnel enter condensate oil storage tank 24 as the condensate oil product through rich oil pump 22, one the tunnel absorbs oil as circulation enters 12 tops, absorption tower through rich oil pump 22, poor oil-rich heat exchanger 19 and oil-poor water cooler 20, another road as regenerator column 21 towers at the bottom of rich oil well heater thermal source at the bottom of rich oil pump 22, rich oil well heater 23 enter regenerator column 21 towers, reflux.
Claims (9)
1. sledge-borne type natural gas conditioning retrieving arrangement, described device comprises clean unit and recovery unit, wherein, clean unit comprises filter separator, membrane separation apparatus, regenerative heater, digester and moisture eliminator, recovery unit comprises the absorption tower, regenerator column, ice chest, the LNG storage tank, light hydrocarbon storage tank and condensate oil storage tank, the clean gas outlet of wherein said membrane separation apparatus is divided into two-way, one the tunnel links to each other with the moisture eliminator entrance, another road is connected with the moisture eliminator entrance by behind the regenerative heater, the pneumatic outlet of moisture eliminator is connected with the entrance on absorption tower by pipeline, it is characterized in that: described device also comprises fuel cell, the feed(raw material)inlet of fuel cell is connected with the absorption tower pneumatic outlet by pipeline, and the tail gas outlet of fuel cell is connected with regenerative heater by pipeline.
2. according to device claimed in claim 1, it is characterized in that: packing tower is adopted on described absorption tower, and the theoretical tower tray number on absorption tower is 3～12.
3. according to device claimed in claim 2, it is characterized in that: several 5～8 of the theoretical tower tray on described absorption tower.
4. according to device claimed in claim 1, it is characterized in that: described regenerator column adopts packing tower, and the theoretical tower tray number of regenerator column is 5～12.
5. according to device claimed in claim 4, it is characterized in that: several 6～10 of the theoretical tower tray of described regenerator column.
6. according to device claimed in claim 1, it is characterized in that: described filter separator is horizontal or vertical.
7. according to device claimed in claim 1, it is characterized in that: described moisture eliminator is at least 2, connects with parallel way between the moisture eliminator.
8. according to device claimed in claim 1, it is characterized in that: described digester is 2～4, connects with parallel connection or series system between the digester.
9. according to device claimed in claim 1, it is characterized in that: described light hydrocarbon storage tank top exit links to each other with absorption tower middle feed entrance by the road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220546252 CN202912906U (en) | 2012-10-24 | 2012-10-24 | Skid-mounted type natural gas purifying and recycling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220546252 CN202912906U (en) | 2012-10-24 | 2012-10-24 | Skid-mounted type natural gas purifying and recycling device |
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| Publication Number | Publication Date |
|---|---|
| CN202912906U true CN202912906U (en) | 2013-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220546252 Expired - Lifetime CN202912906U (en) | 2012-10-24 | 2012-10-24 | Skid-mounted type natural gas purifying and recycling device |
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|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103965942A (en) * | 2014-05-09 | 2014-08-06 | 宁夏宝塔石化科技实业发展有限公司 | Light hydrocarbon recovery process technology for oil field associated gas |
| CN110857406A (en) * | 2018-08-23 | 2020-03-03 | 中国石油天然气股份有限公司 | Natural gas flow primary standard device is with anticorrosive system |
| CN110857405A (en) * | 2018-08-23 | 2020-03-03 | 中国石油天然气股份有限公司 | Natural gas purification system and method for natural gas flow primary standard device |
| CN114591769A (en) * | 2020-12-04 | 2022-06-07 | 中国石油化工股份有限公司 | Membrane system structure for removing hydrogen sulfide from natural gas |
-
2012
- 2012-10-24 CN CN 201220546252 patent/CN202912906U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103965942A (en) * | 2014-05-09 | 2014-08-06 | 宁夏宝塔石化科技实业发展有限公司 | Light hydrocarbon recovery process technology for oil field associated gas |
| CN110857406A (en) * | 2018-08-23 | 2020-03-03 | 中国石油天然气股份有限公司 | Natural gas flow primary standard device is with anticorrosive system |
| CN110857405A (en) * | 2018-08-23 | 2020-03-03 | 中国石油天然气股份有限公司 | Natural gas purification system and method for natural gas flow primary standard device |
| CN114591769A (en) * | 2020-12-04 | 2022-06-07 | 中国石油化工股份有限公司 | Membrane system structure for removing hydrogen sulfide from natural gas |
| CN114591769B (en) * | 2020-12-04 | 2023-11-10 | 中国石油化工股份有限公司 | Membrane system structure for removing hydrogen sulfide from natural gas |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130501 |