CN201737698U - Improved equipment for extracting helium from natural gas - Google Patents
Improved equipment for extracting helium from natural gas Download PDFInfo
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- CN201737698U CN201737698U CN2010202870919U CN201020287091U CN201737698U CN 201737698 U CN201737698 U CN 201737698U CN 2010202870919 U CN2010202870919 U CN 2010202870919U CN 201020287091 U CN201020287091 U CN 201020287091U CN 201737698 U CN201737698 U CN 201737698U
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- helium
- natural gas
- rectifying tower
- expander
- improved equipment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
Improved equipment for extracting helium from natural gas comprises a natural gas inlet pipe, a heat exchanger, a rectifying tower and an expander, and is characterized in that the natural gas inlet pipeline is switched in the heat exchanger and then is accessed in the rectifying tower; a raw helium outlet pipeline is arranged at the top of the rectifying tower, a rectifying liquid pipeline switched in the heat exchanger is also arranged at the bottom of the rectifying tower and then is switched in the expander after being led out of the heat exchanger, and the expander is further provided with a tail gas outlet pipe and a relatively conventional helium extracting device. The improved equipment improves the disjoining pressure and temperature of the rectifying tower in the helium extracting process, thereby reducing the power consumption required for cooling, liquefaction, and separation; and meanwhile, the pressure reduction of the transported natural gas is beneficial for improving the ratio of expansion, thereby increasing the refrigerating capacity. The improved equipment solves the problem that since the expander of the conventional helium extracting equipment in the helium extracting process is required to be provided with liquid after expansion, the cooling efficiency of the expander is reduced (the expander of the improved equipment is not required to be provided with liquid in the helium extracting process), therefore, the improved equipment has obvious energy-saving effect and can be popularized for use.
Description
Technical field
The utility model relates to chemical separating method equipment, and particularly a kind of Sweet natural gas of improvement is carried helium equipment.
Background technology
From Sweet natural gas, extract helium, wide range of industrial applications is separation by deep refrigeration at present, its ultimate principle is to utilize the helium liquefaction temperature extremely low, the principle that is difficult to liquefy, constantly reduce gas temperature by freezing, with component liquefaction, low temperature fractionations such as the methane in the Sweet natural gas, oxygen, nitrogen, thereby obtain raw helium, raw helium is obtained A level helium (HE concentration is greater than 99.995%) through further making with extra care.Routine is carried helium equipment as shown in Figure 1 at present, after the purifying treatment such as natural gas via decarburization, drying, Sweet natural gas after obtaining clean, exsiccant and purifying, liquefy by the decompressor expansion after the Sweet natural gas process interchanger heat exchange after the purification, enter again in the rectifying tower and separate, cat head obtains a raw helium, and the liquid at the bottom of the tower is externally carried to normal temperature gasification back through interchanger throttling re-heat.Yet, existing carry helium equipment and all have the following disadvantages: 1. the Sweet natural gas after purifying is to enter rectifying tower more earlier after decompressor expands decompression, advance corresponding the diminishing of stream pressure that rectifying tower carries out low ternperature separation process this moment, and reduce in order to satisfy isolating required temperature, must must increase refrigeration and separation work to a certain extent again, just increase energy consumption (mainly being compression power consumption and refrigerating loss) so virtually.2. simultaneously for satisfying the isolating requirement of liquefaction, the decompressor band liquid that the back fluid must be to a certain degree that expands., because temperature can not fine adjusting and control before the Sweet natural gas after purifying expanded, cold under low temperature dark rank cold and the general cold temperature can not finely be mated, when serious the device Sweet natural gas can not be liquefied and ordinary production.When outside defeated gas pressure when reducing, the pressure and temp in the rectifying tower needs relatively stable, can not increase expansion simultaneously and recently increase refrigerating duty.
Summary of the invention
At above-mentioned weak point, the object of the present invention is to provide a kind of Sweet natural gas of low temperature cold and the effectively tangible improvement of reduction energy consumption for cooling energy-saving effect that can rationally utilize to carry helium equipment.
In order to achieve the above object, the present invention has adopted following technical scheme: a kind of Sweet natural gas of improvement is carried helium equipment, comprise Sweet natural gas intake ducting, interchanger, rectifying tower and decompressor, wherein, described Sweet natural gas intake ducting feeds rectifying tower after inserting interchanger again, and the rectifying tower top is provided with the raw helium outlet pipe, and described rectifier bottoms also is provided with the rectifying liquid pipeline that inserts interchanger, and rectifying liquid pipeline inserts decompressor after deriving interchanger again, and described decompressor also is provided with the tail gas outlet pipe.
The present invention is the natural gas liquefaction after making purification under the deep cooling condition, and the low temperature fractionation separation obtains raw helium.Concrete principle of work is: the Sweet natural gas after the purification enters rectifying in the rectifying tower after entering interchanger liquefaction through the Sweet natural gas intake ducting again, and the rectifying tower cat head obtains a raw helium derives from the raw helium outlet pipe; Liquid at the bottom of the rectifying Tata is derived through rectifying liquid pipeline and is entered interchanger throttling heat exchange vaporization and obtain carrying dense tail gas, carries dense tail gas and enter that decompressor expands and re-heat is externally carried by the tail gas outlet pipe again behind normal temperature.
Beneficial effect of the present invention is:
(1). in the existing equipment, Sweet natural gas after the purification is to enter rectifying tower more earlier after decompressor expands decompression, the present invention then is that the Sweet natural gas after purifying directly enters rectifying tower and carries out low ternperature separation process before decompressor expands decompression, to carry out the pressure of low ternperature separation process higher than existing equipment so the Sweet natural gas after purifying among the present invention advances rectifying tower, thereby improved isolating required temperature, help reducing refrigeration and separation work, simultaneously, low-pressure tail gas pressure of the present invention is corresponding also high, then the required merit of pipe network is corresponding just to be reduced with pushing back after the tail gas supercharging, thereby effectively reaches energy-saving effect.
For example, to advance ice chest pressure is 2.5Mpa, and going out device pressure is 1.0Mpa, and the pressure that throttling needs is reduced to 0.5Mpa, then the pressure of existing equipment rectifying tower is 1.5Mpa (condensing temperature of corresponding rectifying tower top is for-148 ℃), and ratio of expansion is about 2.5/1.5=1.67; The present invention then pressure of rectifying tower is 2.5Mpa (condensing temperature of corresponding rectifying tower top is for-136 ℃), and ratio of expansion is about 2.0/1.0=2.
Carry parameter such as the table 2 that helium and the present invention carry helium with the existing installation of HYSYS analog calculation, decompressor of the present invention as can be seen increases refrigerating duty 15KW, and the back temperature that expands simultaneously reduces about 5 ℃, and the low-pressure tail gas compression increases the about 82KW of energy efficient because of intake pressure.
Table 1 existing installation is proposed the processing parameter simulation comparison that helium technology/the present invention puies forward helium technology
* actual employing the present invention carries helium, has further reduced the condensation load of rectifying tower, has lowered the low pressure compression power consumption.
(2). operation, operation aspect: operation control is more stable
Existing installation is carried helium: because the gas field material gas quantity constantly reduces, and Natural gas consumption constantly increases, natural gas supply contradiction becomes increasingly conspicuous, pipe network material pressure fluctuation is bigger, Various Seasonal unstripped gas temperature contrast is also bigger in addition, thereby expands preceding gas flow temperature, pressure transient, causes the cold balancing of device wayward, temperature can not fine adjusting and control before exist expanding, and the cold under low temperature dark rank cold and the general cold temperature can not finely be mated.Device even can't carry out normal regulating when serious is operated very difficult.
The present invention carries helium: can advance the method for the flow size of decompressor by adjusting, make the preceding temperature that expands adjustable.The operated adjusting function of device is improved.
Because entering the air-flow of decompressor is the air-flow of rectifying tower tower bottoms body after the throttling heat exchange, the amount of this air-flow and temperature all can realize stable control through the rectifying tower operation, thereby can guarantee the cold balancing of device, make easy and simple to handle, stable.
Description of drawings
The existing routine of Fig. 1 is carried helium device structure block diagram.
Fig. 2 structured flowchart of the present invention.
The different refrigeration temperatures of Fig. 3 are to the synoptic diagram that influences of coefficient of refrigerating performance.
Among the figure: 1. Sweet natural gas intake ducting; 2. interchanger; 3. rectifying tower; 4. decompressor; 5. raw helium outlet pipe; 6. rectifying liquid pipeline; 7. tail gas outlet pipe.
Embodiment
As shown in Figure 2, a kind of Sweet natural gas of improvement is carried helium equipment, comprise Sweet natural gas intake ducting 1, interchanger 2, rectifying tower 3 and decompressor 4, after inserting interchanger 2, Sweet natural gas intake ducting 1 feeds rectifying tower 3 again, and rectifying tower 3 tops are provided with raw helium outlet pipe 5, rectifying tower 3 bottoms also are provided with the rectifying liquid pipeline 6 that inserts interchanger 2, and after deriving interchanger 2, rectifying liquid pipeline 6 inserts decompressor 4 again, decompressor 4 also is provided with tail gas outlet pipe 7, Sweet natural gas after the purification enters rectifying in the rectifying tower 3 after entering interchanger 2 liquefaction through Sweet natural gas intake ducting 1 again, and rectifying tower 3 cats head obtain a raw helium derives from raw helium outlet pipe 5; Liquid at the bottom of rectifying tower 2 towers is derived through rectifying liquid pipeline 6 and is entered interchanger 2 throttling heat exchange vaporization and obtain carrying dense tail gas, carries dense tail gas and enter that decompressor 4 expands and re-heat is externally carried by tail gas outlet pipe 5 again behind normal temperature.
One aspect of the present invention mainly is the separating pressure that has improved rectifying tower, thereby improved isolating required temperature, help reducing merit (the needed coefficient of refrigerating performance of refrigeration is seen Fig. 4 under the differing temps, as can be seen, suitably improves the refrigeration liquefying temperature and can obviously save energy consumption for cooling).On the other hand, help increasing the ratio of expansion of decompressor, thereby improve the refrigeration capacity of decompressor, be particularly suitable for going out at present the score of device gas pressure from the low situation of pressure tower.
Claims (1)
1. the Sweet natural gas of an improvement is carried helium equipment, comprise Sweet natural gas intake ducting (1), interchanger (2), rectifying tower (3) and decompressor (4), it is characterized in that: described Sweet natural gas intake ducting (1) feeds rectifying tower (3) after inserting interchanger (2) again, and rectifying tower (3) top is provided with raw helium outlet pipe (5), described rectifying tower (3) bottom also is provided with the rectifying liquid pipeline (6) that inserts interchanger (2), and rectifying liquid pipeline (6) inserts decompressor (4) after deriving interchanger (2) again, and described decompressor (4) also is provided with tail gas outlet pipe (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202870919U CN201737698U (en) | 2010-08-10 | 2010-08-10 | Improved equipment for extracting helium from natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202870919U CN201737698U (en) | 2010-08-10 | 2010-08-10 | Improved equipment for extracting helium from natural gas |
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| Publication Number | Publication Date |
|---|---|
| CN201737698U true CN201737698U (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202870919U Expired - Lifetime CN201737698U (en) | 2010-08-10 | 2010-08-10 | Improved equipment for extracting helium from natural gas |
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| CN (1) | CN201737698U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642990A (en) * | 2017-03-13 | 2017-05-10 | 中国石油集团工程设计有限责任公司 | Recovery device and method for washing hydrocarbon to extract helium in natural gas |
-
2010
- 2010-08-10 CN CN2010202870919U patent/CN201737698U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642990A (en) * | 2017-03-13 | 2017-05-10 | 中国石油集团工程设计有限责任公司 | Recovery device and method for washing hydrocarbon to extract helium in natural gas |
| CN106642990B (en) * | 2017-03-13 | 2023-03-28 | 中国石油天然气集团有限公司 | Recovery device and method for extracting helium gas by washing hydrocarbons in natural gas |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110209 |
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| CX01 | Expiry of patent term |