CN103398286A - Device and method for increasing super-cooling degree of liquid carbon dioxide storage tank - Google Patents
Device and method for increasing super-cooling degree of liquid carbon dioxide storage tank Download PDFInfo
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- CN103398286A CN103398286A CN2013103029651A CN201310302965A CN103398286A CN 103398286 A CN103398286 A CN 103398286A CN 2013103029651 A CN2013103029651 A CN 2013103029651A CN 201310302965 A CN201310302965 A CN 201310302965A CN 103398286 A CN103398286 A CN 103398286A
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
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Abstract
The invention relates to a device and method for increasing the super-cooling degree of a liquid carbon dioxide storage tank. The device comprises a storage tank, as well as a drain valve, a pressure gauge, a thermometer, an air inlet valve, an exhaust pipe, an air inlet pipe and a high-pressure cylinder which are arranged on the storage tank, wherein an outlet end of the drain valve is connected with the exhaust pipe, and an inlet end of the air inlet valve is connected with the high-pressure cylinder through the air inlet pipe. The device overcomes the defects in the prior art, does not need extra mechanical devices, is low in energy consumption and can obtain higher super-cooling degree only by virtue of the high-pressure cylinder after a storage tank system is simply reformed.
Description
Technical field
The present invention relates to a kind of method that improves liquid carbon dioxide tank Subcoold temperature, particularly the method for supercharging raising Subcoold temperature after first step-down cooling.
Background technique
Namely realize energy-saving and emission-reduction by to dark coal seam filling liquid carbon dioxide replacement methane, improving the methane output technology, improved again methane output; For prevent liquid carbon dioxide by injection pump supercharging time vaporization causes that gas is stifled, gas lock, reduction pump efficiency, to improve on the one hand the efficiency of injection pump, to improve on the other hand the Subcoold temperature of carbon dioxide tank.The existing method that improves the Subcoold temperature of carbon dioxide tank mainly contains two kinds, and the first is to adopt refrigerator to reduce the liquid carbon dioxide temperature; The second is to adopt the centrifugal pump engine driven supercharging in the tank outlet.These two kinds of methods are all to realize Subcoold temperature by supercharging, have non-uniform temperature, and the local defect that can form dry ice; And these two kinds of methods all need extra procuring equipment, have increased operating cost and energy consumption is higher, and the Subcoold temperature that obtains is less.
Summary of the invention
The problem that the technology of the present invention solves is: overcome the deficiencies in the prior art part, do not need additionally to purchase machinery, energy consumption is low, to only needing a gas cylinder can obtain larger Subcoold temperature after the simple transformation of tank system.
Technical solution of the present invention is:
A kind of device that improves liquid carbon dioxide tank Subcoold temperature, its special way is: comprise tank, be arranged on escape cock, pressure gauge, thermometer, suction valve, exhaust tube, suction tude, gas cylinder on tank, the outlet end of described escape cock is connected with exhaust tube, and the entry end of described suction valve is connected with gas cylinder by suction tude.
Above-mentioned gas cylinder is high-pressure nitrogen bottle.
Improve the method for liquid carbon dioxide tank Subcoold temperature, its special way is: comprise the following steps:
1] open escape cock 2, the carbon dioxide in tank 1 is exitted by escape cock, vaporize to reduce the pressure and temperature of tank by the carbon dioxide that discharges;
2] with standing a period of time of tank, until the pressure and temperature of tank no longer descends;
3] gas cylinder is connected with the suction valve on tank, opens suction valve, to tank, pour a certain amount of pressurized gas, by suction valve, control pumping rate and final pressure, improve the pressure of tank to setting value.
Step 1] in exit the slow step-down of tank by bleed valve, pressure decay rate is 0.008-0.025MPa per minute.
Step 3] in pumping rate be 0.01-0.03MPa per minute, the safety pressure maximum value that tank supercharging final pressure must not allow greater than tank.
Above-mentioned gas cylinder is high-pressure nitrogen bottle.
The present invention's beneficial effect compared with prior art is:
1,, owing to first tank being discharged a small amount of carbon dioxide vaporization heat absorption, make carbon dioxide tank temperature reduce by 1～3 ℃.
2,, by to the supercharging of carbon dioxide tank, make the liquid carbon dioxide of carbon dioxide tank obtain larger Subcoold temperature under corresponding pressure, in the scope that the tank pressure security allows, can obtain the Subcoold temperature of 3～10 ℃.
Description of drawings
Fig. 1 is that a kind of method that improves the carbon dioxide Subcoold temperature of the present invention totally forms schematic diagram.
Embodiment
As shown in Figure 1, the present invention is comprised of exhaust tube 1, escape cock 2, tank 3, pressure gauge 4, thermometer 5, suction valve 6, suction tude 7, gas cylinder 8.The outlet end of escape cock is connected with exhaust tube, and the entry end of suction valve is connected with gas cylinder by suction tude.
Method based on the raising carbon dioxide Subcoold temperature of Fig. 1 system:
1] open escape cock 2, the carbon dioxide in tank 1 is exitted by bleed valve, vaporize to reduce the pressure and temperature of tank by the carbon dioxide that discharges; Pressure decay rate is 0.008-0.025MPa per minute.
2] standing a period of time of tank, until the tank pressure and temperature is stable.
3] gas cylinder is connected with the upper suction valve of tank, opens suction valve, to tank, pour a certain amount of pressurized gas, by suction valve, control pumping rate and final pressure, improve the pressure of tank to setting value.Pumping rate is 0.01-0.03MPa per minute, and tank supercharging final pressure must not be greater than the safety pressure maximum value of tank permission.
The principle of the invention:
At first discharge a certain amount of carbon dioxide in tank, utilize the carbon dioxide vaporization to take away heat, reduce carbon dioxide tank pressure and realize simultaneously liquid carbon dioxide fast cooling in tank; With external air source, tank is carried out supercharging again, make the carbon dioxide in tank that the Subcoold temperature of 3～10 ℃ be arranged under corresponding pressure, while making liquid carbon dioxide inject operation in down-hole, evaporating capacity is few, improves injection pump efficiency.If it is improper that venting speed is selected, local temperature is too low, dry ice occurs.In addition, pumping rate is also wanted careful selection, affects the Security of whole system.
Embodiment:
(1) liquid carbon dioxide of 10t is arranged in tank, pressure is the corresponding boiling temperature-19.51 ℃ of 2MPa(tank liquid carbon dioxide this moment), temperature-20.5 ℃, slowly open escape cock 2,, by exhaust tube 1 venting, observe the tank internal pressure by pressure gauge 4 and change, 10 minutes step-down 0.18MPa, this moment tank pressure 1.82MPa, this moment, tank liquid carbon dioxide temperature was-22.5 ℃.
(2), with standing a period of time of tank, treat that in tank, pressure carbon dioxide tends towards stability, observe temperature and no longer descend, can carry out the supercharging work of the 3rd step.Discharge altogether approximately 140Kg carbon dioxide in first two steps;
(3) gas cylinder 8 is connected with tank 3 by suction tude 7 and suction valve 6, open suction valve 6, slowly pass into high pressure nitrogen to tank, supercharging in 10 minutes is until pressure gauge 4 shows that tank pressure is 2.2MPa, this moment, tank was temperature-resistant, for-22.5 ℃, and under liquid carbon dioxide 2.2MPa pressure, corresponding boiling temperature is-16.37 ℃, and in tank, the Subcoold temperature of liquid carbon dioxide is 6.13 ℃.
Claims (6)
1. device that improves liquid carbon dioxide tank Subcoold temperature, it is characterized in that: comprise tank, be arranged on escape cock, pressure gauge, thermometer, suction valve, exhaust tube, suction tude, gas cylinder on tank, the outlet end of described escape cock is connected with exhaust tube, and the entry end of described suction valve is connected with gas cylinder by suction tude.
2. the device of raising liquid carbon dioxide tank Subcoold temperature according to claim 1, it is characterized in that: described gas cylinder is high-pressure nitrogen bottle.
3., based on the method for the raising liquid carbon dioxide tank Subcoold temperature of claim 1 or 2 described device, it is characterized in that: comprise the following steps:
1] open escape cock, the carbon dioxide in tank is exitted by escape cock, vaporize to reduce the pressure and temperature of tank by the carbon dioxide that discharges;
2] with standing a period of time of tank, until the pressure and temperature of tank no longer descends;
3] gas cylinder is connected with the suction valve on tank, opens suction valve, to tank, pour a certain amount of pressurized gas, by suction valve, control pumping rate and final pressure, improve the pressure of tank to setting value.
4. the method for raising liquid carbon dioxide tank Subcoold temperature according to claim 3, is characterized in that: step 1] in exit the slow step-down of tank by bleed valve, pressure decay rate is 0.008-0.025MPa per minute.
5. the method for raising liquid carbon dioxide tank Subcoold temperature according to claim 3, is characterized in that: step 3] in pumping rate be 0.01-0.03MPa per minute, the safety pressure maximum value that tank supercharging final pressure must not allow greater than tank.
6. the method for raising liquid carbon dioxide tank Subcoold temperature according to claim 3, it is characterized in that: described gas cylinder is high-pressure nitrogen bottle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310302965.1A CN103398286B (en) | 2013-07-15 | 2013-07-15 | A kind of device and method improving liquid CO 2 tank degree of supercooling |
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| CN201310302965.1A CN103398286B (en) | 2013-07-15 | 2013-07-15 | A kind of device and method improving liquid CO 2 tank degree of supercooling |
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| CN103398286A true CN103398286A (en) | 2013-11-20 |
| CN103398286B CN103398286B (en) | 2016-08-10 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727387A (en) * | 2014-01-03 | 2014-04-16 | 国核电力规划设计研究院 | Heating method for carbon dioxide gasification device |
| CN104208835A (en) * | 2014-09-22 | 2014-12-17 | 中煤科工集团重庆研究院有限公司 | Liquid carbon dioxide fire extinguishing device for emergency rescue in disaster areas |
| CN104266421A (en) * | 2014-09-26 | 2015-01-07 | 烟台冰轮股份有限公司 | Working medium discharge device and discharge control method used for CO2 refrigeration system |
| CN108361554A (en) * | 2018-04-02 | 2018-08-03 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of nitrogen supercharging device and its application method |
| CN108374655A (en) * | 2018-04-02 | 2018-08-07 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Liquid carbon dioxide dry method sand fracturing system and technological process |
| CN108884968A (en) * | 2016-03-28 | 2018-11-23 | 长濑产业株式会社 | Liquid CO 2 feedway and painting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103727387A (en) * | 2014-01-03 | 2014-04-16 | 国核电力规划设计研究院 | Heating method for carbon dioxide gasification device |
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| CN104208835A (en) * | 2014-09-22 | 2014-12-17 | 中煤科工集团重庆研究院有限公司 | Liquid carbon dioxide fire extinguishing device for emergency rescue in disaster areas |
| CN104266421A (en) * | 2014-09-26 | 2015-01-07 | 烟台冰轮股份有限公司 | Working medium discharge device and discharge control method used for CO2 refrigeration system |
| CN108884968A (en) * | 2016-03-28 | 2018-11-23 | 长濑产业株式会社 | Liquid CO 2 feedway and painting device |
| CN108884968B (en) * | 2016-03-28 | 2021-08-03 | 长濑产业株式会社 | Liquid carbon dioxide supply device and coating device |
| CN108361554A (en) * | 2018-04-02 | 2018-08-03 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of nitrogen supercharging device and its application method |
| CN108374655A (en) * | 2018-04-02 | 2018-08-07 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Liquid carbon dioxide dry method sand fracturing system and technological process |
| CN108374655B (en) * | 2018-04-02 | 2023-11-17 | 中国石油天然气集团有限公司 | Liquid carbon dioxide dry sand fracturing system and technological process |
| CN108361554B (en) * | 2018-04-02 | 2024-06-11 | 中国石油天然气集团有限公司 | Nitrogen supercharging device and application method thereof |
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