CN103398286B - A kind of device and method improving liquid CO 2 tank degree of supercooling - Google Patents
A kind of device and method improving liquid CO 2 tank degree of supercooling Download PDFInfo
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- CN103398286B CN103398286B CN201310302965.1A CN201310302965A CN103398286B CN 103398286 B CN103398286 B CN 103398286B CN 201310302965 A CN201310302965 A CN 201310302965A CN 103398286 B CN103398286 B CN 103398286B
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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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
Abstract
The present invention relates to a kind of device and method improving liquid CO 2 tank degree of supercooling, the drain valve that including tank, is arranged on tank, Pressure gauge, thermometer, intake valve, bleeder pipe, air inlet pipe, gas cylinder, the port of export of drain valve is connected with bleeder pipe, and the arrival end of intake valve is connected with gas cylinder by air inlet pipe.In place of the present invention overcomes the deficiencies in the prior art, it is not necessary to additionally purchase plant equipment, energy consumption is low, only needs a gas cylinder can obtain bigger degree of supercooling after simply transforming tank system.
Description
Technical field
The present invention relates to a kind of method improving liquid CO 2 tank degree of supercooling, after particularly first blood pressure lowering cooling
Supercharging improves the method for degree of supercooling.
Background technology
I.e. achieve by improving methane output technology to deep coal seam injection liquid CO 2 displacement methane
Energy-saving and emission-reduction, improve again methane output；Vapour during in order to prevent liquid CO 2 from passing through injection pump supercharging
Change causes gas to block up, gas lock, reduction pump efficiency, the on the one hand efficiency of injection pump to be improved, and on the other hand to improve
The degree of supercooling of carbon dioxide tank.The method of the degree of supercooling of existing raising carbon dioxide tank mainly has two kinds,
The first is to use refrigeration machine to reduce liquid CO 2 temperature；The second is to use centrifugal pump at reservoir outlet
Engine driven supercharging.Both approaches is all to realize degree of supercooling by supercharging, there is non-uniform temperature, Er Qieju
Portion can form the defect of dry ice；And both approaches is required for extra procuring equipment, adds and runs into
This and energy consumption are higher, and the degree of supercooling obtained is less.
Summary of the invention
The problem that the technology of the present invention solves is: in place of overcoming the deficiencies in the prior art, it is not necessary to additionally purchase machine
Tool equipment, energy consumption is low, only needs a gas cylinder to obtain bigger supercool after simply transforming tank system
Degree.
The technical solution of the present invention is:
A kind of device improving liquid CO 2 tank degree of supercooling, it is characterized in that and includes tank, sets
Put the drain valve on tank, Pressure gauge, thermometer, intake valve, bleeder pipe, air inlet pipe, gas cylinder,
The port of export of described drain valve is connected with bleeder pipe, and the arrival end of described intake valve passes through air inlet pipe and high pressure gas
Bottle connects.
Above-mentioned gas cylinder is high-pressure nitrogen bottle.
The method improving liquid CO 2 tank degree of supercooling, it is characterized in that and comprises the following steps:
1] open drain valve 2, the carbon dioxide in tank 1 is exitted by drain valve, by the two of release
Carbonoxide vaporization reduces the pressure and temperature of tank；
2] tank is stood a period of time, until the pressure and temperature of tank no longer declines；
3] gas cylinder is connected with the intake valve on tank, opens intake valve, pour to tank a certain amount of
Gases at high pressure, control pumping rate and final pressure by intake valve, improve the pressure of tank to setting value.
Step 1] in by vent valve exit by slow for tank blood pressure lowering, pressure decay rate is per minute
0.008-0.025MPa。
Step 3] in pumping rate be 0.01-0.03MPa per minute, tank supercharging final pressure cannot be greater than
The safe pressure maximum that tank allows.
Above-mentioned gas cylinder is high-pressure nitrogen bottle.
The present invention compared with prior art provides the benefit that:
1, owing to first tank to be discharged a small amount of carbon dioxide vaporization heat absorption so that carbon dioxide tank temperature
Degree reduces by 1～3 DEG C.
2, by carbon dioxide tank supercharging so that the liquid CO 2 of carbon dioxide tank is in correspondence pressure
Bigger degree of supercooling is obtained, in the range of tank pressure security allows, it is possible to obtain the mistake of 3～10 DEG C under power
Cold degree.
Accompanying drawing explanation
Fig. 1 is that a kind of method improving carbon dioxide degree of supercooling of the present invention totally constitutes schematic diagram.
Detailed description of the invention
As it is shown in figure 1, the present invention by bleeder pipe 1, drain valve 2, tank 3, Pressure gauge 4, thermometer 5,
Intake valve 6, air inlet pipe 7, gas cylinder 8 form.The port of export of drain valve is connected with bleeder pipe, intake valve
Arrival end be connected with gas cylinder by air inlet pipe.
The method improving carbon dioxide degree of supercooling based on Fig. 1 system:
1] open drain valve 2, the carbon dioxide in tank 1 is exitted by vent valve, by the two of release
Carbonoxide vaporization reduces the pressure and temperature of tank；Pressure decay rate is 0.008-0.025MPa per minute.
2] tank stands a period of time, until tank pressure and temperature is stable.
3] gas cylinder is connected with the upper intake valve of tank, opens intake valve, pour necessarily to tank
The gases at high pressure of amount, control pumping rate and final pressure by intake valve, improve the pressure of tank to setting
Value.Pumping rate is 0.01-0.03MPa per minute, and tank supercharging final pressure cannot be greater than what tank allowed
Safe pressure maximum.
The principle of the invention:
First a certain amount of carbon dioxide in release tank, utilizes carbon dioxide vaporization to take away heat, reduces by two
Carbonoxide tank pressure realizes liquid CO 2 fast cooling in tank simultaneously；Again by external air source to tank
Carry out supercharging so that the carbon dioxide in tank has the degree of supercooling of 3～10 DEG C under corresponding pressure so that liquid
When carbon dioxide injects operation in down-hole, evaporating capacity is few, improves injection pump efficiency.If venting speed selects not
Properly, local temperature is too low, dry ice occurs.Additionally, pumping rate also wants careful selection, affect whole system
The safety of system.
Embodiment:
(1) having the liquid CO 2 of 10t in tank, pressure is 2MPa(now tank liquid titanium dioxide
Carbon correspondence boiling temperature-19.51 DEG C), temperature-20.5 DEG C, slowly open drain valve 2, put by bleeder pipe 1
Gas, Pressure gauge 4 in observing tank, pressure changes, 10 minutes blood pressure lowering 0.18MPa, now tank pressure
1.82MPa, now tank liquid CO 2 temperature is-22.5 DEG C.
(2) tank is stood a period of time, treat that in tank, pressure carbon dioxide tends towards stability, observe temperature not
Decline again, the 3rd step supercharging work can be carried out.About 140Kg carbon dioxide is discharged altogether in first two steps；
(3) gas cylinder 8 is connected with tank 3 with intake valve 6 by air inlet pipe 7, opens intake valve 6,
Be slowly introducing high pressure nitrogen to tank, supercharging in 10 minutes until Pressure gauge 4 shows that tank pressure is 2.2MPa,
Now tank is temperature-resistant, for-22.5 DEG C, and boiling point temperature corresponding under liquid CO 2 2.2MPa pressure
Degree is for-16.37 DEG C, and in tank, the degree of supercooling of liquid CO 2 is 6.13 DEG C.
Claims (4)
1. the device improving liquid CO 2 tank degree of supercooling, it is characterised in that: include storage
Case, the drain valve being arranged on tank, Pressure gauge, thermometer, intake valve, bleeder pipe, air inlet pipe,
Gas cylinder, the port of export of described drain valve is connected with bleeder pipe, the arrival end of described intake valve pass through into
Trachea is connected with gas cylinder, is exitted by drain valve by the carbon dioxide in tank, by the two of release
Carbonoxide vaporization reduces the pressure and temperature of tank, then with gas cylinder, tank is carried out supercharging, described
Gas cylinder is high-pressure nitrogen bottle.
2. the method improving liquid CO 2 tank degree of supercooling based on device described in claim 1, its
It is characterised by: comprise the following steps:
1] open drain valve, the carbon dioxide in tank is exitted by drain valve, by the dioxy of release
Change carbon vaporization and reduce the pressure and temperature of tank；
2] tank is stood a period of time, until the pressure and temperature of tank no longer declines；
3] gas cylinder is connected with the intake valve on tank, opens intake valve, pour necessarily to tank
The gases at high pressure of amount, control pumping rate and final pressure by intake valve, improve the pressure of tank to setting
Definite value, gas cylinder is high-pressure nitrogen bottle.
The method of raising liquid CO 2 tank degree of supercooling the most according to claim 2, its feature exists
In step 1] in exitted slow for tank blood pressure lowering by vent valve, pressure decay rate is every point
Clock 0.008-0.025MPa.
4., according to the method improving liquid CO 2 tank degree of supercooling described in Claims 2 or 3, it is special
Levy and be: step 3] in pumping rate be 0.01-0.03MPa per minute, tank supercharging final pressure
Cannot be greater than the safe pressure maximum that tank allows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310302965.1A CN103398286B (en) | 2013-07-15 | 2013-07-15 | A kind of device and method improving liquid CO 2 tank degree of supercooling |
Applications Claiming Priority (1)
| 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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| CN103398286A CN103398286A (en) | 2013-11-20 |
| CN103398286B true CN103398286B (en) | 2016-08-10 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727387B (en) * | 2014-01-03 | 2016-04-06 | 国核电力规划设计研究院 | A kind of temperature-rising method of 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 |
| JP6006448B1 (en) * | 2016-03-28 | 2016-10-12 | 長瀬産業株式会社 | Painting equipment |
| 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 |
| 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 |
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| CA2506606C (en) * | 2005-06-03 | 2006-09-12 | Westport Research Inc. | Storage tank for a cryogenic liquid and method of re-filling same |
| EP2233690A1 (en) * | 2009-03-13 | 2010-09-29 | BP Alternative Energy International Limited | Fluid injection |
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|---|---|---|---|---|
| DE2012843B2 (en) * | 1970-03-18 | 1975-02-13 | Max-Planck-Gesellschaft Zur Foerderung Der Wissenschaften E.V., 3400 Goettingen | Device for the continuous maintenance of adjustable low temperatures by evaporation of low-boiling liquids |
| CN2262157Y (en) * | 1996-04-30 | 1997-09-10 | 成都皮克电力电子技术研究所 | Low temperature liquid state gas storing and releasing device |
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| CN103398286A (en) | 2013-11-20 |
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