CN105299458B - A kind of coalbed methane containing oxygen produces LNG tank system - Google Patents
A kind of coalbed methane containing oxygen produces LNG tank system Download PDFInfo
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- CN105299458B CN105299458B CN201510872248.1A CN201510872248A CN105299458B CN 105299458 B CN105299458 B CN 105299458B CN 201510872248 A CN201510872248 A CN 201510872248A CN 105299458 B CN105299458 B CN 105299458B
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Abstract
The invention discloses the tank system that a kind of coalbed methane containing oxygen produces LNG, tank system includes LNG storage tank unit, centralized control unit, detection unit, BOG gas displacement units.The present invention can accurately realize and reach timely early warning with BOG gas displacements unit by multi-channel gas component detection unit and discharge the BOG gases of danger, reach the LNG that safe storage coalbed methane containing oxygen is produced.
Description
Technical field
The invention belongs to LNG storage field, and in particular to a kind of coalbed methane containing oxygen produces the storage of liquefied natural gas
Deposit system.
Background technology
LNG is the abbreviation of liquefied natural gas, and main component is made up of methane.LNG is by gaseous natural at ambient pressure
Air cooling is allowed to be condensed into liquid to -162 DEG C.Storage and transportation space can be greatlyd save after natural gas liquefaction, and with calorific value
Greatly, the features such as performance is high, is a kind of cleaning, the efficient energy.
Under current energy crisis and environmental protection pressure, exploitation is closed using novel energies such as coal bed gas, shale gas as the world
The sight of note.Coalbed methane containing oxygen is during coal mining, in order to ensure safety of coal mines exploitation and primary byproduct that extraction goes out.Its
Main component is methane, as can be seen that coal bed gas is the more important energy and industrial chemicals from its component content.But this
Plant in the coal bed gas that mode extraction is obtained because its composition is complex, CH4 contents are low (generally between 30%~70%), and
Containing aerobic.Particularly it is less than 50% coal bed gas to methane content, is abnormally dangerous due to the dangerous property of oxygen content high disposal
Combustion-supporting and pro-knock agent, constrain the comprehensive utilization of coalbed methane containing oxygen, therefore be by the oxygen-containing coal seam of this low concentration for a long time
Gas directly burns or discharged, and causes the profligacy of resource and environment is polluted.
With the development of technology, at present in the field of natural gas is produced in low concentration coal-bed gas purification, a variety of contain is occurred in that
The liquefaction technology of oxygen coal bed gas.Publication No. CN101928617A and CN101928617A Chinese patent individually disclose low dense
The degree oxygen-containing cryogenic liquefying of coal bed gas produces LNG techniques and gas-liquid separation device for oxygenous coal bed, and the technique and device are using mixing
Cryogen refrigeration is circulated, and by the raw material gas liquefaction after purification and is separated, and obtains LNG product.In addition, Publication No. CN1952569
Chinese patent application discloses a kind of liquefaction process of coal bed gas containing air, and its cold is produced by gas expansion.
In existing coalbed methane containing oxygen liquefaction process and device, direct oxygen-containing liquifying method causes may in its LNG product
Containing this aerobic safety problem.LNG is during storage tank is stored, and oxygen is mixed into BOG gases and there may be potential safety hazard.But it is existing
LNG storage tank this safety problem is not taken in and taken precautions against.In view of this, the present invention proposes a kind of oxygen-containing coal seam
Gas produces LNG tank system, can early warning in time and discharge danger BOG gases, reach safe storage coalbed methane containing oxygen system
Take LNG purpose.
The content of the invention
In view of this, it is an object of the invention to provide the tank system that a kind of coalbed methane containing oxygen produces LNG, LNG storages
Can system can early warning in time and discharge danger BOG gases, reach safe storage LNG purpose.
To reach above-mentioned purpose, the present invention provides following technical scheme：
A kind of coalbed methane containing oxygen produces LNG tank system, and the tank system includes LNG storage tank unit, center and controlled
Unit, detection unit, BOG gas displacement units；LNG storage tank unit is used to storing the LNG that coalbed methane containing oxygen produces and qualified
Conventional LNG, centralized control unit for monitoring and controlling whole system run, detection unit be used for detect each gas in BOG gases
The concentration of component and temperature of body, BOG gas displacements unit are used to replace the BOG gases in storage tank；
The LNG storage tank unit includes the LNG storage tank 1 that coalbed methane containing oxygen is tentatively produced, qualified conventional LNG storage tank 7；It is described
Centralized control unit includes master controller 6, temperature sensor 2, liquid level sensor 3, pressure sensor 4, temperature pressure sensing
Device 11, suspension apparatus A；The detection unit includes concentration of component and temperature detection center 5, concentration of component and temperature-detecting device
51；The BOG gas displacements unit includes cryogenic pump 8, gasifier 9, booster pump 10, two-position three way magnetic valve 12, gasification gas row
Go out pipeline 13, gas ducting 19, BOG gas displacements air bleeding valve 18；
The qualified conventional LNG storage tank 7 passes sequentially through cryogenic pump 8, gasifier 9, booster pump 10, temperature and pressure transmitter
11st, two-position three way magnetic valve 12 is connected with gas ducting 19 imports in the LNG storage tank 1 that coalbed methane containing oxygen is tentatively produced；Described two
Position-3-way solenoid valve 12 1 is exported to be connected with gasification gas discharge line 13；The concentration of component passes through outstanding with temperature-detecting device 51
Device for hoisting A, which is imported in the LNG storage tank 1 that coalbed methane containing oxygen is tentatively produced, is used for the concentration of component and temperature that detect different spatial
And transfer data to concentration of component and temperature detection center 5；The BOG gas displacements air bleeding valve 18 is arranged at coalbed methane containing oxygen
The tank deck of LNG storage tank 1 tentatively produced；The master controller 6 passes through programed temperature sensor 2, liquid level sensor 3, pressure
Force snesor 4, temperature and pressure transmitter 11, suspension apparatus B, concentration of component and temperature detection center 5, two-position three way magnetic valve
12nd, BOG gas displacements air bleeding valve 18.
Further, the centralized control unit also includes suspension apparatus B, the suspension apparatus B for adjusting gas ducting
19 outlet port, the suspension apparatus B is controlled by master controller 6.
Further, the component has multiple respectively with temperature-detecting device 51 and the suspension apparatus A matched.
The beneficial effects of the present invention are：A kind of coalbed methane containing oxygen proposed by the present invention produces LNG tank system, can be with
Timely early warning and the BOG gases for discharging danger, reach that safe storage coalbed methane containing oxygen produces LNG purpose.
Brief description of the drawings
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below and carried out
Explanation：
Fig. 1 is the tank system schematic diagram that a kind of coalbed methane containing oxygen produces LNG；
Fig. 2 is the tank system schematic diagram that a kind of preferred coalbed methane containing oxygen produces LNG.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in Figure 1：The tank system that coalbed methane containing oxygen produces LNG includes LNG storage tank unit, centralized control unit, inspection
Survey unit, BOG gas displacement units；LNG storage tank unit is used to store LNG and the qualified routine that coalbed methane containing oxygen is produced
LNG, centralized control unit is run for monitoring and controlling whole system, and detection unit is used for the group for detecting each gas in BOG gases
Divide Pressure, Concentration, Temperature, BOG gas displacements unit is used to replace the BOG gases in storage tank；The LNG storage tank unit includes oxygen-containing coal
The LNG storage tank 1 that layer gas is tentatively produced, qualified conventional LNG storage tank 7；The centralized control unit includes master controller 6, temperature
Sensor 2, liquid level sensor 3, pressure sensor 4, temperature and pressure transmitter 11, suspension apparatus A；The detection unit includes group
Divide Pressure, Concentration, Temperature inspection center 5, one or more concentration of component and temperature-detecting device 51；The BOG gas displacements unit bag
Include cryogenic pump 8, gasifier 9, booster pump 10, two-position three way magnetic valve 12, gasification gas discharge line 13, gas ducting 19, BOG gas
Body replaces air bleeding valve 18；
The qualified conventional LNG storage tank 7 passes sequentially through cryogenic pump 8, gasifier 9, booster pump 10, temperature and pressure transmitter
11st, two-position three way magnetic valve 12 is connected with gas ducting 19 imports in the LNG storage tank 1 that coalbed methane containing oxygen is tentatively produced；Described two
Position-3-way solenoid valve 12 1 is exported to be connected with gasification gas discharge line 13；The concentration of component passes through outstanding with temperature-detecting device 51
Device for hoisting A, which is imported in the LNG storage tank 1 that coalbed methane containing oxygen is tentatively produced, is used for the concentration of component and temperature that detect different spatial
And transfer data to concentration of component and temperature detection center 5；The BOG gas displacements air bleeding valve 18 is arranged at coalbed methane containing oxygen
The tank deck of LNG storage tank 1 tentatively produced；The master controller 6 passes through programed temperature sensor 2, liquid level sensor 3, pressure
Force snesor 4, temperature and pressure transmitter 11, suspension apparatus B, concentration of component and temperature detection center 5, two-position three way magnetic valve
12nd, BOG gas displacements air bleeding valve 18.
The centralized control unit, which also includes suspension apparatus B, the suspension apparatus B, is used for the outlet for adjusting gas ducting 19
Position, the suspension apparatus B is controlled by master controller 6.
The tank system normal work that the coalbed methane containing oxygen produces LNG is run as follows：
When the LNG that coalbed methane containing oxygen is produced, which enters storage tank, to be stored, now each system unit is started working, and center control is single
LNG liquid levels change to adjust suspention in real time in the LNG storage tank 1 that member is tentatively produced by the detection coalbed methane containing oxygen of liquid level sensor 3
Device A, is made gas component concentrations be in different spatial with temperature sensor 51, the group of different spatial is detected with this
Divide Pressure, Concentration, Temperature, while also controlling suspension apparatus B to adjust the outlet port of gas ducting 19, stored up when master controller is detected
When BOG gases oxygen concentration exceedes prescribed limit in tank, master controller 6 sends instruction and starts BOG gas displacement units, opens
LNG in cryogenic pump 8, qualified conventional LNG storage tank 7 is pressurized after gasifying through gasifier 9 by booster pump 10, temperature pressure sensing
Device 11 detects temperature and pressure and is compared not up to regulation discharge pressure and temperature with temperature sensor 51 and pressure sensor 4
When spending, the action of two-position three way magnetic valve 12 allows gasifying gas to enter gasification gas passing away 13, is drained into BOG gas recovery pipes
Road；When reaching regulation discharge pressure with temperature, the action of two-position three way magnetic valve 12 allows substitution gas to enter filling channel 19, together
When BOG gas displacements air bleeding valve 18 open, discharge the BOG gases of displacement.When gas composition sensors are examined with temperature sensor 51
When the inside BOG gas oxygen concentrations of LNG storage tank 1 that survey coalbed methane containing oxygen is produced are in prescribed limit, master controller 6 sends finger
Order stops BOG gas displacement units.Certainly all control logics are all that prior programmed is controlled by master controller 6
System.
LNG temperature in the LNG storage tank 1 that temperature sensor 2 is produced mainly for detection of coalbed methane containing oxygen in described device.
Reach timely early warning by gas component detection unit and BOG gas displacements unit in the present invention and discharge danger
The BOG gases of danger, reach the LNG that safe storage coalbed methane containing oxygen is produced.
Fig. 2 is the tank system schematic diagram that a kind of preferred coalbed methane containing oxygen produces LNG.Wherein gas component concentrations with temperature
Degree sensor 51 has three, is respectively labeled as 20,11,22, and cooperates the suspension apparatus A of utilization also having 3, mark respectively
It is designated as 15,16,17.Gas component concentrations and temperature sensor are set to it is multiple, can be simultaneously different in detection storage tank 1 respectively
The gas component concentrations and temperature of locus, can more accurately realize by multi-channel gas component detection unit with
BOG gas displacements unit come reach timely early warning and discharge danger BOG gases, reach what safe storage coalbed methane containing oxygen was produced
LNG。
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment the present invention is described in detail, it is to be understood by those skilled in the art that can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (3)
1. a kind of coalbed methane containing oxygen produces LNG tank system, it is characterised in that the tank system include LNG storage tank unit,
Centralized control unit, detection unit, BOG gas displacement units；
The LNG storage tank unit includes the LNG storage tank that coalbed methane containing oxygen is tentatively produced（1）, qualified conventional LNG storage tank（7）；It is described
Centralized control unit includes master controller（6）, temperature sensor（2）, liquid level sensor（3）, pressure sensor（4）, temperature
Pressure sensor（11）, suspension apparatus（A）；The detection unit includes concentration of component and temperature detection center（5）, concentration of component
With temperature-detecting device（51）；The BOG gas displacements unit includes cryogenic pump（8）, gasifier（9）, booster pump（10）, two
Three-way magnetic valve（12）, gasification gas discharge line（13）, gas ducting（19）, BOG gas displacement air bleeding valves（18）；
The qualified conventional LNG storage tank（7）Pass sequentially through cryogenic pump（8）, gasifier（9）, booster pump（10）, temperature pressure sensing
Device（11）, two-position three way magnetic valve（12）With gas ducting（19）Connection imports the LNG storage tank that coalbed methane containing oxygen is tentatively produced（1）
It is interior；The two-position three way magnetic valve（12）One outlet and gasification gas discharge line（13）Connection；The concentration of component is examined with temperature
Survey device（51）Pass through suspension apparatus（A）Import the LNG storage tank that coalbed methane containing oxygen is tentatively produced（1）It is interior to be used to detect different spaces
The concentration of component and temperature of position simultaneously transfer data to concentration of component and temperature detection center（5）；The BOG gas displacements row
Air valve（18）It is arranged at the LNG storage tank that coalbed methane containing oxygen is tentatively produced（1）Tank deck；The master controller（6）Pass through program control
Temperature sensor processed（2）, liquid level sensor（3）, pressure sensor（4）, temperature and pressure transmitter（11）, suspension apparatus（B）, group
Divide Pressure, Concentration, Temperature inspection center（5）, two-position three way magnetic valve（12）, BOG gas displacement air bleeding valves（18）.
2. a kind of coalbed methane containing oxygen produces LNG tank system according to claim 1, it is characterised in that the center control
Unit processed also includes suspension apparatus（B）, the suspension apparatus（B）For adjusting gas ducting（19）Outlet port, it is described outstanding
Device for hoisting（B）By master controller（6）Control.
3. a kind of coalbed methane containing oxygen produces LNG tank system according to claim 1, it is characterised in that the component with
Temperature-detecting device（51）And the suspension apparatus matched（A）Have respectively multiple.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510872248.1A CN105299458B (en) | 2015-12-02 | 2015-12-02 | A kind of coalbed methane containing oxygen produces LNG tank system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510872248.1A CN105299458B (en) | 2015-12-02 | 2015-12-02 | A kind of coalbed methane containing oxygen produces LNG tank system |
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| CN105299458A CN105299458A (en) | 2016-02-03 |
| CN105299458B true CN105299458B (en) | 2017-07-11 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323295A (en) * | 2011-09-30 | 2012-01-18 | 中广核工程有限公司 | System for monitoring concentration of hydrogen in containment vessel |
| CN203345510U (en) * | 2013-05-27 | 2013-12-18 | 中国人民解放军后勤工程学院 | Nitrogen charging device for oil tank |
| CN104848033A (en) * | 2015-05-29 | 2015-08-19 | 中国石油化工股份有限公司 | Alkane storage tank protection method |
| CN204611340U (en) * | 2015-04-15 | 2015-09-02 | 兰州展辉电子科技有限公司 | For the airtight cover plate of air sac type of storage tank or tank car energy-conserving and environment-protective washing unit |
| CN104925410A (en) * | 2015-05-29 | 2015-09-23 | 中国石油化工股份有限公司 | Method for preventing gas-phase burning explosion of alkane storage tank |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000240896A (en) * | 1999-02-24 | 2000-09-08 | Osaka Gas Co Ltd | Liquefied gas storage tank |
-
2015
- 2015-12-02 CN CN201510872248.1A patent/CN105299458B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323295A (en) * | 2011-09-30 | 2012-01-18 | 中广核工程有限公司 | System for monitoring concentration of hydrogen in containment vessel |
| CN203345510U (en) * | 2013-05-27 | 2013-12-18 | 中国人民解放军后勤工程学院 | Nitrogen charging device for oil tank |
| CN204611340U (en) * | 2015-04-15 | 2015-09-02 | 兰州展辉电子科技有限公司 | For the airtight cover plate of air sac type of storage tank or tank car energy-conserving and environment-protective washing unit |
| CN104848033A (en) * | 2015-05-29 | 2015-08-19 | 中国石油化工股份有限公司 | Alkane storage tank protection method |
| CN104925410A (en) * | 2015-05-29 | 2015-09-23 | 中国石油化工股份有限公司 | Method for preventing gas-phase burning explosion of alkane storage tank |
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| CN105299458A (en) | 2016-02-03 |
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