CN203672049U - Movable oil field nitrogen generation and liquefaction device - Google Patents
Movable oil field nitrogen generation and liquefaction device Download PDFInfo
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- CN203672049U CN203672049U CN201320603653.XU CN201320603653U CN203672049U CN 203672049 U CN203672049 U CN 203672049U CN 201320603653 U CN201320603653 U CN 201320603653U CN 203672049 U CN203672049 U CN 203672049U
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Abstract
The utility model relates to a movable oil field nitrogen generation and liquefaction device which comprises a high-pressure nitrogen generation unit and a liquid nitrogen preparation unit. Nitrogen liquefaction can be achieved by directly performing expansion refrigeration on high-pressure nitrogen and indirectly utilizing part of circulating cryogen nitrogen medium to serve as cryogen, and therefore, energy is saved. The movable oil field nitrogen generation and liquefaction device is compact in structure, convenient to regulate, safe and reliable and capable of working continuously and moving conveniently on site.
Description
Technical field
The utility model relates to a kind of nitrogen-making device, relates in particular to a kind of mobile oil field nitrogen liquefying plant processed.
Background technology
China's part oil field belongs to " three is low " reservoir, must take to increase production accordingly modification measures.At present, high pressure nitrogen be widely used in oil field drilling well, oil recovery, completion protection, purge in the constructions such as displacement; The technology such as " sand fracturing of omnidistance formula companion fluid injection nitrogen ", " preposition liquid nitrogen pressure break " becomes oil extraction in oil field and produces emerging hot technology in the recent period, and liquid nitrogen becomes a kind of indispensable raw material of field produces.
At present, the great majority that oil drilling uses are all the prizing vehicle mounted nitrogen gas preparings of single production high pressure nitrogen, do not possess and have the function of producing high pressure nitrogen and liquid nitrogen simultaneously concurrently.Or liquid nitrogen storage tank adds liquid nitrogen pump vehicle, but liquid nitrogen need to be transported to situ of drilling well, and have and can not realize continuous production, use the shortcomings such as inconvenience.
Summary of the invention
The utility model mainly solves the problems of the technologies described above, and provides a kind of for reduce energy consumption, produce high pressure nitrogen and prepare the mobile oil field nitrogen liquefying plant processed of liquid nitrogen function simultaneously.
The utility model is mainly achieved through the following technical solutions:
A kind of mobile oil field nitrogen liquefying plant processed, comprise and produce high pressure nitrogen unit and prepare liquid nitrogen unit, it is characterized in that, described production high pressure nitrogen unit is made up of air intake filter, air compressor, cooler, pretreatment unit, middle control tunica fibrosa group, nitrogen supercharging machine and high pressure nitrogen valve, and the described liquid nitrogen unit of preparing is made up of described production high pressure nitrogen unit, liquefaction of nitrogen pipeline valve, nitrogen supercharging decompressor, circulating refrigerant booster expansion machine, ice chest, liquid nitrogen storage tank, liquid nitrogen injection pump.
Use air compressor that the air compressing of air intake filter processing is pressurized to 2.4MPa, through cooler cooling de-watering, pass through the pretreatment unit filtration, purifications such as filter again, enter hollow-fibre membrane and realize nitrogen separation, nitrogen after separation enters nitrogen supercharging machine, be compressed to 35MPa, become high pressure nitrogen, conversion high pressure nitrogen valve, can realize described device 35MPa high pressure nitrogen output function.
Close high pressure nitrogen valve, open liquefaction of nitrogen pipeline valve, start nitrogen supercharging decompressor, circulating refrigerant booster expansion machine, ice chest, liquid nitrogen storage tank.Nitrogen supercharging machine exports two pipelines and the high pressure nitrogen valve that are provided with, and liquefaction of nitrogen pipeline valve is realized the switching that described device produces high pressure nitrogen and prepare two kinds of functions of liquid nitrogen and used.High pressure nitrogen enters nitrogen supercharging decompressor, utilizes self pressure of high pressure nitrogen in decompressor, to carry out direct adiabatic expansion refrigeration, and indirect refrigeration realizes the liquefaction of medium nitrogen as cryogen to recycle a small amount of circulation cryogen nitrogen.Circulate cryogen nitrogen through overcompression, after swell refrigeration, enter ice chest and carry out exchange heat with medium nitrogen, realize the liquefaction of medium nitrogen.The nitrogen of liquefaction enters nitrogen storage tank, and can realize by liquid nitrogen injection pump the liquid nitrogen function of injecting in oil drilling and oil recovery are used of described device.
The mode of the production liquid nitrogen of described device is to utilize equipment self to produce the advantage of high pressure nitrogen, and high pressure nitrogen is carried out to direc expansion refrigeration, utilizes the energy of high pressure nitrogen self to carry out nitrogen refrigeration, reduces extra power consumption.Recycle small part circulation cryogen nitrogen medium simultaneously and produce cold as cryogen pressuring expansion, by the indirect cooling medium nitrogen of ice chest, realize medium liquefaction of nitrogen.
In described device, cooling medium and circulation cryogen are all selected nitrogen, in apparatus operation process, the nitrogen after can liquefaction easy to use supplements as cryogen, has reduced cryogen and has added equipment, simplify appliance arrangement quantity, also reduced cryogen cost of transportation simultaneously.In described device, cooling medium and circulation cryogen are all selected nitrogen, have utilized the relation of nitrogen at the following condensing temperature of critical pressure and its pressure, effectively control and utilize cryogen nitrogen pressure, temperature and refrigerating capacity, and nitrogen medium is liquefied under certain pressure.
The beneficial effects of the utility model are: the utility model can provide pressure up to 35MPA, and flow, up to the nitrogen of 1200 Nm3/h, also can provide flow to be equal to 1140 Nm3/h(nitrogen) liquid nitrogen.Possess liquid nitrogen production, storage, function of injecting simultaneously, and high pressure nitrogen output function.And energy implement device compactness, easy to adjust, continuous, safe and reliable, the on-the-spot functions such as convenient that move of working.Particularly adopt the design of the small-sized booster expansion machine that pressure is high, expansion ratio is high, treating capacity is little, and can reach the serviceability of device and compact appearance, light and function that can whole Transporting.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model mobile oil field nitrogen liquefying plant processed.
The specific embodiment
The technical solution of the utility model is done more specifically bright below in conjunction with accompanying drawing:
As shown in Figure 1, a kind of mobile oil field of the utility model nitrogen liquefying plant processed first starts air screw compressor 2, air in atmosphere enters air screw compressor 2 through air filter 1, air compressing is pressurized to 2.4MPa, Compressed Gas is first cooling through aluminium fin air-cooled cooler 3, entering steam-water separation tank 4 dewaters, pass through again the pretreatment units such as filter 5 filtration, purifications, make the degree of purity of Compressed Gas reach granularity content and be less than 0.01um, oil moisture content is less than the degree of purity index of 0.01ppm, then enter hollow-fibre membrane 6 and realize the separation of nitrogen-oxygen, nitrogen after separation enters nitrogen plunger booster machine 7, be compressed to 35MPa and become high pressure nitrogen, high pressure nitrogen valve 9 is opened, liquefaction pipeline valve 10 is closed, implement device 35MPa high pressure nitrogen output function.
Close high pressure nitrogen valve 9, open liquefaction of nitrogen pipeline valve 10, start nitrogen supercharging decompressor 11,13, compressor 20, circulating refrigerant booster expansion machine 22, ice chest 15, liquid nitrogen storage tank 17.High pressure nitrogen enters nitrogen supercharging decompressor 11,13 and carries out two-stage pressurization expansion, utilizes self pressure of high pressure nitrogen in decompressor, to carry out direct adiabatic expansion refrigeration.Recycle a small amount of circulation cryogen nitrogen indirect refrigeration realizes the liquefaction of medium nitrogen as cryogen simultaneously, the cryogen nitrogen that circulates compresses through compressor 20, after booster expansion machine 22 swell refrigerations, enter ice chest 15 and carry out exchange heat with medium nitrogen, realize the liquefaction of medium nitrogen.The nitrogen of controlling liquefaction by choke valve 16 enters the flow of nitrogen storage tank 17, and can realize by liquid nitrogen injection pump 19 the liquid nitrogen function of injecting in oil drilling and oil recovery are used of this device.
Complete equipment can reach following operational factor:
| Sequence number | Technical parameter | Unit | Technical requirement |
| 1 | Nitrogen flow | Nm3/h | 1200 |
| 2 | Nitrogen delivery temperature | ℃ | ≤80 |
| 3 | Nitrogen pressure at expulsion | MPA | 35 |
| 4 | Liquid nitrogen flow | Nm3/h | 1140(is equal to nitrogen) |
| 5 | Liquid nitrogen discharge temperature | ℃ | Under≤-170(3.5MPa) |
| 6 | Discharge pressure before liquid nitrogen injection pump (in storage tank) | MPA | 3.5 |
| 7 | Discharge pressure after liquid nitrogen injection pump | MPA | 35 |
The utility model can also have other embodiment, and all employings are equal to the technical scheme of replacement or equivalent transformation, all drop in the protection domain of the utility model requirement.
Claims (3)
1. a mobile oil field nitrogen liquefying plant processed, comprise and produce high pressure nitrogen unit and prepare liquid nitrogen unit, it is characterized in that, described production high pressure nitrogen unit is by air intake filter, air compressor, cooler, pretreatment unit, middle control tunica fibrosa group, nitrogen supercharging machine and high pressure nitrogen valve composition, the described liquid nitrogen unit of preparing is by described production high pressure nitrogen unit, liquefaction of nitrogen pipeline valve, nitrogen supercharging decompressor, circulating refrigerant booster expansion machine, ice chest, liquid nitrogen storage tank, liquid nitrogen injection pump composition, cooling medium in described device and circulation cryogen are nitrogen.
2. a kind of mobile oil field according to claim 1 nitrogen liquefying plant processed, it is characterized in that, described production high pressure nitrogen unit and the described liquid nitrogen unit of preparing are exported two pipelines and the described high pressure nitrogen valve that are provided with by described nitrogen supercharging machine, described liquefaction of nitrogen pipeline valve connects to be controlled.
3. a kind of mobile oil field according to claim 1 nitrogen liquefying plant processed, is characterized in that, liquid nitrogen is injected by liquid nitrogen injection pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320603653.XU CN203672049U (en) | 2013-09-29 | 2013-09-29 | Movable oil field nitrogen generation and liquefaction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320603653.XU CN203672049U (en) | 2013-09-29 | 2013-09-29 | Movable oil field nitrogen generation and liquefaction device |
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| Publication Number | Publication Date |
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| CN203672049U true CN203672049U (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320603653.XU Withdrawn - After Issue CN203672049U (en) | 2013-09-29 | 2013-09-29 | Movable oil field nitrogen generation and liquefaction device |
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| CN (1) | CN203672049U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486823A (en) * | 2013-09-29 | 2014-01-01 | 天津凯德实业有限公司 | Movable oilfield nitrogen making liquefaction device |
-
2013
- 2013-09-29 CN CN201320603653.XU patent/CN203672049U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486823A (en) * | 2013-09-29 | 2014-01-01 | 天津凯德实业有限公司 | Movable oilfield nitrogen making liquefaction device |
| CN103486823B (en) * | 2013-09-29 | 2015-09-30 | 天津凯德实业有限公司 | A kind of mobile oil field nitrogen liquefying plant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140625 Effective date of abandoning: 20150930 |
|
| RGAV | Abandon patent right to avoid regrant |