CN102506298B - Cold-circulating system and method for liquefied natural gas loading system - Google Patents
Cold-circulating system and method for liquefied natural gas loading system Download PDFInfo
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- CN102506298B CN102506298B CN 201110301238 CN201110301238A CN102506298B CN 102506298 B CN102506298 B CN 102506298B CN 201110301238 CN201110301238 CN 201110301238 CN 201110301238 A CN201110301238 A CN 201110301238A CN 102506298 B CN102506298 B CN 102506298B
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Abstract
The invention discloses a cold-circulating system and a method for a liquefied natural gas loading system. The loading system comprises a liquefied natural gas storage tank, a loading main pipe, an evaporated gas return main pipe and a loading branch pipe which are connected in sequence; the cold-circulating system comprises a cold-circulating main pipe, a cold-circulating branch pipe, a flow measuring instrument, a flow control valve and an orifice plate, wherein the cold-circulating main pipe is arranged at the tail end of the loading main pipe; the cold-circulating branch pipe is arranged at the tail end of the loading branch pipe; the flow measuring instrument is arranged on the loading main pipe or the loading branch pipe and is used for measuring the flow of liquefied natural gas in the loading main pipe or the loading branch pipe; the flow control valve is arranged on the cold-circulating main pipe and is used for controlling cold-state liquefied natural gas to enter the cold-circulating main pipe from the tail end of the loading main pipe and flow to the liquefied natural gas storage tank so as to cool the loading main pipe when the flow is lower than the preset value; and the orifice plate is arranged on the cold-circulating main pipe or the cold-circulating branch pipe and is used for limiting the flow of the cold-state liquefied natural gas in the cold-circulating main pipe or the cold-circulating branch pipe to be lower than the preset flow value.
Description
Technical field
The present invention relates to the LNG Liquefied natural gas field, in particular to a kind of cold circulatory system and method for liquefied natural gas loading system.
Background technique
LNG Liquefied natural gas (LNG, Liquefied Natural Gas) is a kind of high-grade energy, has the advantages that calorific value is high, combustion pollution is little.LNG shipping and tank car transportation dual mode are adopted in the long-distance transportation of LNG Liquefied natural gas, when adopting the transportation of LNG tank car, need at design tank car loading system, LNG be delivered in tank car by pipeline from the LNG storage tank.generally, LNG entrucking branch line arranges many, so that realize the entrucking simultaneously of many LNG tank cars, LNG entrucking operation is simultaneously generally carried out by day, and the LNG storage tank and tank car entrucking district distant, the leakage heat that can not stop environment at the heat insulation layer that adds pipeline fully, can produce BOG because environment leaks heat in the entrucking pipeline, and BOG can cause pipeline and system overpressure, the entrucking pipeline recovers ambient temperature and a large amount of LNG evaporation, system overpressure can bring potential safety hazard, the entrucking pipeline recovers ambient temperature, during next entrucking operation by the time, need precooling, the one, spended time is longer, temperature alternately changes the pipe stress problem of bringing in addition, safe operation for the LNG loading system is unfavorable, and a large amount of LNG evaporations will cause the waste of energy, and therefore the reduction that brings the loading system economic benefit must arrange the cold circulatory system, keeps entrucking pipeline and system and is in cold conditions.
Prior art adopts every entrucking branch line that the cold pipeloop of independently entrucking is set, guaranteed the cold conditions of entrucking branch line, but have but that cold circulating load is large, energy consumption is high, can not keep the defective of whole piece entrucking house steward cold conditions, especially work as the entrucking branch line many, temporarily do not carry out cold circulation time and the entrucking branch line that is positioned at entrucking house steward end is in the state of not entrucking for a long time, can not guarantee that loading system is in cold conditions.
Summary of the invention
The invention provides a kind of cold circulatory system and method for liquefied natural gas loading system, be in cold conditions and reduce energy consumption in order to guarantee loading system.
For achieving the above object, the invention provides a kind of cold circulatory system for liquefied natural gas loading system, loading system comprises that successively the liquefied natural gas (LNG) tank, entrucking house steward, the boil-off gas that are connected return to house steward and entrucking branch line, the cold circulatory system comprises:
Cold circulation house steward is arranged on entrucking house steward's end;
Cold loop branch pipe is arranged on the end of entrucking branch line;
Flow measurement instrument is arranged on entrucking house steward or entrucking branch line, is used for measuring the flow of entrucking house steward or entrucking branch line LNG Liquefied natural gas;
Flow control valve is arranged on cold circulation house steward, is used for when flow during less than preset value, and control cold conditions LNG Liquefied natural gas enters cold circulation house steward from entrucking house steward's end, and flows to liquefied natural gas (LNG) tank, carries out cooling to the entrucking house steward; And
Orifice plate is arranged on cold circulation house steward or cold loop branch pipe, is used for limiting the flow of cold circulation house steward or cold loop branch pipe cold conditions LNG Liquefied natural gas less than predefined flow value.
Better, the above-mentioned cold circulatory system also comprises: the first alarm unit, be connected with flow measurement instrument, and be used for sending during less than preset value when flow alarm signal.
Better, the above-mentioned cold circulatory system also comprises: temperature instrument is arranged on the end of entrucking house steward or entrucking branch line; Flow control valve is connected with the temperature instrument that is arranged on entrucking house steward end, the entrucking house steward's who detects when temperature instrument temperature is during higher than predefined temperature value, control cold conditions LNG Liquefied natural gas enters cold circulation house steward from entrucking house steward's end, and flow to liquefied natural gas (LNG) tank, carry out cooling to the entrucking house steward.
Better, the above-mentioned cold circulatory system also comprises: the second alarm unit, be connected with temperature instrument, and the entrucking house steward who detects when temperature instrument or the temperature of entrucking branch line are sent alarm signal during higher than predefined temperature value.
For achieving the above object, the present invention also provides a kind of cold circulatory system for liquefied natural gas loading system, flow measurement instrument is arranged on cold circulation house steward or cold loop branch pipe, to replace the setting of flow measurement instrument on entrucking house steward or entrucking branch line in the above-mentioned cold circulatory system, be used for measuring the flow of cold circulation house steward or cold loop branch pipe LNG Liquefied natural gas.
For achieving the above object, the present invention also provides a kind of cold circulation method for liquefied natural gas loading system, loading system comprises that successively the liquefied natural gas (LNG) tank, entrucking house steward, the boil-off gas that are connected return to house steward and entrucking branch line, and this cold circulation method comprises the following steps:
By being arranged on the flow of LNG Liquefied natural gas in the flow measurement instrument measurement entrucking house steward on entrucking house steward or cold circulation house steward;
Flow and preset value are compared, enter cold circulation house steward if flow less than preset value, is controlled the cold conditions LNG Liquefied natural gas from entrucking house steward's end, and flow to liquefied natural gas (LNG) tank, carry out cooling to the entrucking house steward;
Wherein, be provided with orifice plate on cold circulation house steward, be used for limiting the flow of cold circulation house steward cold conditions LNG Liquefied natural gas less than predefined flow value.
Better, above-mentioned cold circulation method is further comprising the steps of: send alarm signal during less than preset value when flow.
Better, above-mentioned cold circulation method also comprises step: the temperature instrument of the end by being arranged on the entrucking house steward detects entrucking house steward's temperature; Temperature and predefined temperature value are compared, the entrucking house steward's who detects when temperature instrument temperature is during higher than predefined temperature value, control cold conditions LNG Liquefied natural gas enters cold circulation house steward from entrucking house steward's end, and flow to liquefied natural gas (LNG) tank, carry out cooling to the entrucking house steward.
Better, above-mentioned cold circulation method is further comprising the steps of: the entrucking house steward who detects when temperature instrument or the temperature of entrucking branch line are sent alarm signal during higher than predefined temperature value.
In the above-described embodiments, on entrucking house steward or entrucking branch line end or cold circulation house steward or cold loop branch pipe, flow measurement instrument is set, flow in recording entrucking house steward or entrucking branch line or cold circulation house steward or cold loop branch pipe is during less than predefined numerical value, the open cold circulation valve, realize entrucking house steward or the cold circulation of entrucking branch line, simultaneously by on cold circulation house steward or cold loop branch pipe, orifice plate being set, avoid cold circulating load excessive, cause the increase of loading system overall energy consumption, guaranteed effectively that again entrucking house steward or entrucking branch line are in cold conditions simultaneously.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the cold circulatory system schematic diagram that is used for liquefied natural gas loading system of one embodiment of the invention;
Fig. 2 is the cold circulatory system schematic diagram that is used for liquefied natural gas loading system of another embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not paying the every other embodiment who obtains under the creative work prerequisite.
Fig. 1 is the cold circulatory system schematic diagram that is used for liquefied natural gas loading system of one embodiment of the invention; In Fig. 1, MV-1 is safety check; MV-2 is manual ball valve; FCV is flow control valve; XV is automatic switch valve (pneumatic or electronic); PSV is safety valve.PI is the pressure indication; TI is the temperature indication; FIC is the flow indication and controls; TIC is the temperature indication and controls; HIC manually controls.RO is orifice plate.Arrow A 1 expression LNG flows to the LNG storage tank; Arrow A 2 expression LNG are from the LNG storage tank.
As shown in Figure 1, loading system comprises liquefied natural gas (LNG) tank (not shown), entrucking house steward 13 and many entrucking branch line A-X that are connected successively, and the cold circulatory system comprises:
Cold circulation house steward 12 is arranged on entrucking house steward 13 end;
Flow measurement instrument FIC is arranged on entrucking house steward 13, is used for measuring the flow of entrucking house steward LNG Liquefied natural gas;
Flow control valve FCV, be arranged on cold circulation house steward 12, when being used for flow as entrucking house steward 13 less than preset value, control cold conditions LNG Liquefied natural gas enters cold circulation house steward 12 from entrucking house steward 13 end, and then flow to liquefied natural gas (LNG) tank, to carry out cooling to entrucking house steward 13; And
Orifice plate RO, be arranged on cold circulation house steward 12, the flow that is used for limiting cold circulation house steward 12 cold conditions LNG Liquefied natural gas avoids cold circulating load excessive less than predefined flow value, cause the increase of loading system overall energy consumption, guaranteed effectively that again the entrucking house steward is in cold conditions simultaneously.
The BOG that produces in the entrucking process (Boil Off Gas) gas returns to house steward 11 by boil-off gas and returns to the LNG storage tank.
Cooling for the entrucking branch line is carried out, as shown in Figure 1, the cold circulatory system also comprises:
Cold loop branch pipe 16 is arranged on the end of entrucking branch line A-X (in the present embodiment the label of entrucking branch line only for convenience of description, the entrucking branch line can be one or more), flows to cold circulation house steward 12;
Flow measurement instrument FIC is arranged on entrucking branch line A-X, is used for measuring the flow of entrucking branch line LNG Liquefied natural gas;
Orifice plate RO, be arranged on cold loop branch pipe 16, the flow that is used for limiting cold loop branch pipe 16 cold conditions LNG Liquefied natural gas avoids cold circulating load excessive less than predefined flow value, cause the increase of loading system overall energy consumption, guaranteed effectively that again the entrucking branch line is in cold conditions simultaneously.
Wherein, be arranged on the flow control valve FCV on entrucking branch line A-X, be used for metering LNG Liquefied natural gas and flow control when entrucking.Cold circular flow on the entrucking branch line is controlled by the orifice plate that is arranged on cold loop branch pipe.
The BOG gas that produces in the entrucking process enters gas phase house steward 11 by the gas phase return line, and and then returns to the LNG storage tank.In figure, 14 for the gas phase return arm of entrucking branch line; 15 for the LNG entrucking arm of entrucking branch line.
In the above-described embodiments, entrucking house steward or entrucking branch line end, flow measurement instrument is set, flow in recording entrucking house steward or entrucking branch line is during less than predefined numerical value, the open cold circulation valve, realize entrucking house steward or the cold circulation of entrucking branch line, simultaneously by on cold pipeloop, orifice plate being set, avoid cold circulating load excessive, cause the increase of loading system overall energy consumption, guaranteed effectively that again entrucking house steward or entrucking branch line are in cold conditions simultaneously.
When some entrucking branch line is in not entrucking of short-term operation, open the valve on the cold pipeloop on these entrucking branch lines, keep these entrucking branch lines and be in cold conditions; When some longer a period of time of entrucking branch line is in not entrucking operation, close the cold circulatory system on these entrucking branch lines, adopt the mode of the cold circulation of house steward, only keeping the entrucking house steward is in cold conditions and gets final product, the energy dissipation of avoiding the cold circulation of long term maintenance entrucking branch line to cause, the efficient of raising loading system integral body.
For example, the above-mentioned cold circulatory system also comprises: the first alarm unit, be connected with flow measurement instrument, be used for sending during less than preset value when flow alarm signal, to remind the manual flow control valve on the cold pipeloop of site operation personnel's manual unlocking, carry out cooling to entrucking house steward or entrucking branch line.
For example, the above-mentioned cold circulatory system also comprises: temperature instrument is arranged on the end of entrucking house steward or entrucking branch line; Flow control valve is connected with temperature instrument on the entrucking house steward is set, the entrucking house steward's who detects when temperature instrument temperature is during higher than predefined temperature value, control the cold conditions LNG Liquefied natural gas and enter cold circulation house steward's end from the entrucking house steward, and flow to liquefied natural gas (LNG) tank, carry out cooling to the entrucking house steward.
For example, the above-mentioned cold circulatory system also comprises: the second alarm unit, be connected with temperature instrument, the entrucking house steward who detects when temperature instrument or the temperature of entrucking branch line are during higher than predefined temperature value, send alarm signal, to remind the manual flow control valve on the cold pipeloop of site operation personnel's manual unlocking, carry out cooling to entrucking house steward or entrucking branch line.
Fig. 2 is the cold circulatory system schematic diagram that is used for liquefied natural gas loading system of another embodiment of the present invention; In Fig. 2, MV-1 is safety check; MV-2 is manual ball valve; FCV is flow control valve; XV is automatic switch valve (pneumatic or electronic); PSV is safety valve.PI is the pressure indication; TI is the temperature indication; FIC is the flow indication and controls; TIC is the temperature indication and controls; HIC manually controls.RO is orifice plate.Arrow A 1 expression LNG flows to the LNG storage tank; Arrow A 2 expression LNG are from the LNG storage tank.
As shown in Figure 2, flow measurement instrument also can be arranged on cold circulation house steward or cold loop branch pipe, to replace the setting of flow measurement instrument on entrucking house steward or entrucking branch line in above-described embodiment, be used for measuring the flow of cold circulation house steward or cold loop branch pipe LNG Liquefied natural gas, when the flow that records during less than predefined cold circulation house steward or cold loop branch pipe flow value, automatic or manual is opened cold circulation valve, can reach equally entrucking house steward or entrucking branch line are carried out cooling purpose.
For the cold circulatory system that is used for liquefied natural gas loading system in above-described embodiment, the present invention also provides a kind of cold circulation method for liquefied natural gas loading system, loading system comprises that successively the liquefied natural gas (LNG) tank, entrucking house steward, the boil-off gas that are connected return to house steward and entrucking branch line, and this cold circulation method comprises the following steps:
By being arranged on the flow of LNG Liquefied natural gas in the flow measurement instrument measurement entrucking house steward on entrucking house steward or cold circulation house steward;
Flow and preset value are compared, enter entrucking house steward's end if flow less than preset value, is controlled the cold conditions LNG Liquefied natural gas from cold circulation house steward, and flow to liquefied natural gas (LNG) tank, carry out cooling to the entrucking house steward;
Wherein, be provided with orifice plate on cold circulation house steward, be used for limiting the flow of cold circulation house steward cold conditions LNG Liquefied natural gas less than predefined flow value.
In the above-described embodiments, at entrucking house steward end, flow measurement instrument is set, flow in recording the entrucking house steward is during less than predefined numerical value, automatic open cold circulation valve, realize the cold circulation of entrucking house steward, by on cold circulation house steward, orifice plate being set, avoid cold circulating load excessive simultaneously, cause the increase of loading system overall energy consumption, guaranteed effectively that again the entrucking house steward is in cold conditions simultaneously.
For example, above-mentioned cold circulation method is further comprising the steps of: send alarm signal when flow during less than preset value, to remind the manual flow control valve on the cold circulation house steward of site operation personnel's manual unlocking, carry out cooling to the entrucking house steward.
For example, above-mentioned cold circulation method also comprises step: the temperature that detects the entrucking house steward by the temperature instrument that is arranged on entrucking house steward end; Temperature and predefined temperature value are compared, the entrucking house steward's who detects when temperature instrument temperature is during higher than predefined temperature value, control the cold conditions LNG Liquefied natural gas and enter entrucking house steward's end from cold circulation house steward, and flow to liquefied natural gas (LNG) tank, carry out cooling to the entrucking house steward.
For example, above-mentioned cold circulation method is further comprising the steps of: the entrucking house steward's who detects when temperature instrument temperature is during higher than predefined temperature value, send alarm signal, to remind the manual flow control valve on the cold pipeloop of site operation personnel's manual unlocking, carry out cooling to the entrucking house steward.
When needs carry out cold circulation time on the entrucking branch line, the cold cycling switch valve of operator's manual unlocking entrucking branch line end, control the cold conditions LNG Liquefied natural gas and enter cold loop branch pipe from entrucking branch line end, and flow to liquefied natural gas (LNG) tank, carry out cooling to the entrucking branch line;
Wherein, the orifice plate that arranges on the cold loop branch pipe of entrucking branch line is used for limiting the flow of cold loop branch pipe cold conditions LNG Liquefied natural gas less than predefined flow value.
One of ordinary skill in the art will appreciate that: accompanying drawing is an embodiment's schematic diagram, and the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
One of ordinary skill in the art will appreciate that: the module in the device in embodiment can be described according to embodiment and be distributed in embodiment's device, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into a plurality of submodules.
It should be noted that at last: above embodiment only in order to technological scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technological scheme that previous embodiment is put down in writing, and perhaps part technical characteristics wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of embodiment of the present invention technological scheme.
Claims (9)
1. cold circulatory system that is used for liquefied natural gas loading system, described loading system comprise that the liquefied natural gas (LNG) tank, entrucking house steward, the boil-off gas that are connected successively return to house steward and entrucking branch line, it is characterized in that, the described cold circulatory system comprises:
Cold circulation house steward is arranged on described entrucking house steward's end;
Cold loop branch pipe is arranged on the end of described entrucking branch line;
Flow measurement instrument is arranged on described entrucking house steward or described entrucking branch line, is used for measuring the flow of described entrucking house steward or described entrucking branch line LNG Liquefied natural gas;
Flow control valve, be arranged on described cold circulation house steward, be used for when described flow during less than preset value, control cold conditions LNG Liquefied natural gas enters described cold circulation house steward from described entrucking house steward's end, and flow to liquefied natural gas (LNG) tank, carry out cooling to described entrucking house steward; And
Orifice plate is arranged on described cold circulation house steward or described cold loop branch pipe, is used for limiting the flow of described cold circulation house steward or described cold loop branch pipe cold conditions LNG Liquefied natural gas less than predefined flow value.
2. the cold circulatory system according to claim 1, is characterized in that, also comprises:
The first alarm unit is connected with described flow measurement instrument, is used for sending during less than preset value when described flow alarm signal.
3. the cold circulatory system according to claim 1, is characterized in that, also comprises:
Temperature instrument is arranged on the end of described entrucking house steward or described entrucking branch line;
Described flow control valve is connected with the described temperature instrument that is arranged on described entrucking house steward end, the described entrucking house steward's who detects when described temperature instrument temperature is during higher than predefined temperature value, control cold conditions LNG Liquefied natural gas enters described cold circulation house steward from described entrucking house steward's end, and flow to liquefied natural gas (LNG) tank, carry out cooling to described entrucking house steward.
4. the cold circulatory system according to claim 3, is characterized in that, also comprises:
The second alarm unit is connected with described temperature instrument, and the described entrucking house steward who detects when described temperature instrument or the temperature of described entrucking branch line are sent alarm signal during higher than predefined temperature value.
5. the described cold circulatory system for liquefied natural gas loading system of any one according to claim 1-4, it is characterized in that, described flow measurement instrument is arranged on described cold circulation house steward or described cold loop branch pipe, to replace the setting of described flow measurement instrument on described entrucking house steward or described entrucking branch line, be used for measuring the flow of described cold circulation house steward or described cold loop branch pipe LNG Liquefied natural gas.
6. cold circulation method that is used for liquefied natural gas loading system, described loading system comprise that the liquefied natural gas (LNG) tank, entrucking house steward, the boil-off gas that are connected successively return to house steward and entrucking branch line, it is characterized in that, comprise the following steps:
By being arranged on the flow of LNG Liquefied natural gas in the described entrucking house steward of flow measurement instrument measurement on described entrucking house steward or cold circulation house steward;
Described flow and preset value are compared, if described flow is less than described preset value, control the cold conditions LNG Liquefied natural gas by flow control valve and enter described cold circulation house steward from described entrucking house steward's end, and flow to liquefied natural gas (LNG) tank, carry out cooling to described entrucking house steward;
Wherein, be provided with orifice plate on described cold circulation house steward, be used for limiting the flow of described cold circulation house steward cold conditions LNG Liquefied natural gas less than predefined flow value.
7. cold circulation method according to claim 6, is characterized in that, and is further comprising the steps of:
Send alarm signal during less than preset value when described flow.
8. cold circulation method according to claim 6, is characterized in that, also comprises step:
The temperature instrument of the end by being arranged on described entrucking house steward detects described entrucking house steward's temperature;
Described temperature and predefined temperature value are compared, the described entrucking house steward's who detects when described temperature instrument temperature is during higher than described predefined temperature value, control the cold conditions LNG Liquefied natural gas by described flow control valve and enter described cold circulation house steward from described entrucking house steward's end, and flow to liquefied natural gas (LNG) tank, carry out cooling to described entrucking house steward.
9. cold circulation method according to claim 8, is characterized in that, and is further comprising the steps of:
The described entrucking house steward's who detects when described temperature instrument temperature is sent alarm signal during higher than predefined temperature value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110301238 CN102506298B (en) | 2011-09-30 | 2011-09-30 | Cold-circulating system and method for liquefied natural gas loading system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110301238 CN102506298B (en) | 2011-09-30 | 2011-09-30 | Cold-circulating system and method for liquefied natural gas loading system |
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| CN102506298A CN102506298A (en) | 2012-06-20 |
| CN102506298B true CN102506298B (en) | 2013-11-06 |
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| CN111928112A (en) * | 2020-09-10 | 2020-11-13 | 重庆耐德能源装备集成有限公司 | LNG loading and unloading vehicle pipeline structure, device, loading and unloading vehicle method and metering method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330760A (en) * | 1998-12-18 | 2002-01-09 | 埃克森美孚上游研究公司 | Dual refrigeration cycles for natural gas liquefaction |
| CN201255557Y (en) * | 2008-08-14 | 2009-06-10 | 苏州制氧机有限责任公司 | Natural gas liquefaction device |
| WO2010051617A1 (en) * | 2008-11-10 | 2010-05-14 | Jose Lourenco | Method to increase gas mass flow injection rates to gas storage caverns using lng |
| CN202302724U (en) * | 2011-09-30 | 2012-07-04 | 中国寰球工程公司 | Cold circulation system used for LNG (liquefied natural gas) loading system |
-
2011
- 2011-09-30 CN CN 201110301238 patent/CN102506298B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330760A (en) * | 1998-12-18 | 2002-01-09 | 埃克森美孚上游研究公司 | Dual refrigeration cycles for natural gas liquefaction |
| CN201255557Y (en) * | 2008-08-14 | 2009-06-10 | 苏州制氧机有限责任公司 | Natural gas liquefaction device |
| WO2010051617A1 (en) * | 2008-11-10 | 2010-05-14 | Jose Lourenco | Method to increase gas mass flow injection rates to gas storage caverns using lng |
| CN202302724U (en) * | 2011-09-30 | 2012-07-04 | 中国寰球工程公司 | Cold circulation system used for LNG (liquefied natural gas) loading system |
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| CN102506298A (en) | 2012-06-20 |
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Address after: Two road 100012 Beijing city Chaoyang District high tech Industrial Park, No. 1. Patentee after: China Global Engineering Co. Ltd. Address before: 100029 Beijing city Chaoyang District cherry Garden Street No. 7 Patentee before: China Huanqiu Engineering Co. |
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Effective date of registration: 20201113 Address after: 100120 Beijing Xicheng District six laying Kang Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CHINA HUANQIU CONTRACTING & ENGINEERING Co.,Ltd. Address before: Two road 100012 Beijing city Chaoyang District high tech Industrial Park, No. 1. Patentee before: CHINA HUANQIU CONTRACTING & ENGINEERING Co.,Ltd. |