CN104390133A - Device for recovering evaporated natural gas - Google Patents
Device for recovering evaporated natural gas Download PDFInfo
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- CN104390133A CN104390133A CN201410653572.XA CN201410653572A CN104390133A CN 104390133 A CN104390133 A CN 104390133A CN 201410653572 A CN201410653572 A CN 201410653572A CN 104390133 A CN104390133 A CN 104390133A
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- natural gas
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Abstract
The invention relates to a device for recovering evaporated natural gas. The device comprises a gasifier, a buffer tank and a compressor, wherein the outlet of the gasifier is communicated with the inlet of the buffer tank, and the outlet of the buffer tank is communicated with the inlet of the compressor. A method for recovering the evaporated natural gas through the device comprises the following steps that the low-temperature evaporated natural gas inside a low-temperature storage tank is introduced into the gasifier, the temperature of the evaporated natural gas is increased to environmental temperature through the gasifier, then the evaporated natural gas enters the buffer tank, finally the evaporated natural gas enters the compressor from the buffer tank, and the evaporated natural gas is pressurized into a nature gas pipeline network or a recovery tank through the compressor; because the pressure inside the recovery tank is at about 25 Mpa and the pressure inside the nature gas pipeline network is at 0.2-1.0 Mpa, a large-sized compressor is adopted when the evaporated natural gas is pressurized into the recovery tank, and a small-sized compressor is adopted when the evaporated natural gas is pressurized into the nature gas pipeline network. The device disclosed by the invention has the advantages of simple structure and low operating cost.
Description
Technical field
The present invention relates to a kind of recovering device of the evaporated natural gas produced in LNG Storage, Transport process.
Background technique
Evaporated natural gas refers to the cryogenic liquide of gas below its critical temperature after pressurization is liquefied, definitely adiabatic because of being difficult to environment, absorption external heat and the gas that evaporates.LNG Liquefied natural gas (LNG) is very easily vaporized at normal temperatures; Even if under the good condition of LNG cold storage tank heat-insulating property, also inevitably cause the natural gas vaporization in low-temperature storage tank to be vaporized, thus form evaporated natural gas.Because the use pressure of low-temperature liquefaction natural gas storage tank is very low, the tank internal pressure after natural gas vaporization can increase.In order to the SC service ceiling not making pressure arrive storage tank, regularly emptying operation have to be carried out.
Direct for evaporated natural gas emptying being existed following problem: 1, rock gas (methane) is discharged in air, is the significant wastage to resource; If 2, methane is directly discharged in air, its greenhouse effect are 21 times of carbon dioxide, are to endanger the one of environment; If 3, methane be directly discharged in air meet naked light can occur burning or blast.
Summary of the invention
Technical problem to be solved by this invention is to provide that a kind of structure is simple, the evaporated natural gas recovering device that evaporated natural gas directly can be recovered in gas distributing system or recycling can.
In order to solve the problems of the technologies described above, the present invention adopts following technological scheme: evaporated natural gas recovering device, it comprises vaporizer, knock out drum and compressor, and the outlet of vaporizer is connected with the import of knock out drum, and the outlet of knock out drum is connected with the import of compressor.
For the purpose of succinctly describing, evaporated natural gas recovering device of the present invention is referred to as this device below.
Evaporated natural gas is generally stored in low-temperature storage tank by user, the method being reclaimed evaporated natural gas by this device is: the outlet of low-temperature storage tank be connected with the import of vaporizer, the outlet of compressor is connected to gas distributing system or recycling can, then the evaporated natural gas of the low temperature in low-temperature storage tank is passed in vaporizer, gas temperature is made to be elevated to ambient temperature by vaporizer, then enter in knock out drum, last evaporated natural gas enters compressor in knock out drum, by compressor, evaporated natural gas is pressurized in gas distributing system or recycling can, because the pressure in recycling can is at about 25Mpa, pressure in gas distributing system is 0.2-1.0Mpa, relatively large compressor is adopted when therefore evaporated natural gas being pressurized to recycling can, and with small-sized compressor when being pressurized to gas distributing system.
As can be seen from technique scheme, this device can realize evaporated natural gas to be directly recovered in gas distributing system or recycling can, and this apparatus structure is simple, operating cost is low.
Accompanying drawing explanation
Fig. 1 is the using state figure of one embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
See Fig. 1.
Evaporated natural gas recovering device, it comprises vaporizer 2, knock out drum 3 and compressor 4, and the outlet of vaporizer 2 is connected with the import of knock out drum 3, and the outlet of knock out drum 3 is connected with the import of compressor 4.
Evaporated natural gas is generally stored in low-temperature storage tank 1 by user, the top of low-temperature storage tank 1 is provided with pressure gauge 5, during use, the outlet of low-temperature storage tank 1 is connected through the import of diffusion valve 6 with vaporizer 2, the outlet of compressor 4 is connected to gas distributing system 7 or recycling can 8, then can the evaporated natural gas of the low temperature in low-temperature storage tank 1 be passed in vaporizer 2, gas temperature is made to be elevated to ambient temperature by vaporizer 2, then enter in knock out drum 3, last evaporated natural gas enters compressor 4 in knock out drum 3, by compressor 4, evaporated natural gas is pressurized in gas distributing system 7 or recycling can 8.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. evaporated natural gas recovering device, is characterized in that: it comprises vaporizer, knock out drum and compressor, and the outlet of vaporizer is connected with the import of knock out drum, and the outlet of knock out drum is connected with the import of compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410653572.XA CN104390133A (en) | 2014-11-17 | 2014-11-17 | Device for recovering evaporated natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410653572.XA CN104390133A (en) | 2014-11-17 | 2014-11-17 | Device for recovering evaporated natural gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104390133A true CN104390133A (en) | 2015-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410653572.XA Pending CN104390133A (en) | 2014-11-17 | 2014-11-17 | Device for recovering evaporated natural gas |
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| CN (1) | CN104390133A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806883A (en) * | 2015-05-22 | 2015-07-29 | 蚌埠市金鹏燃气设备制造有限公司 | Residual gas recovery device of natural gas tank car |
| CN105605417A (en) * | 2016-01-08 | 2016-05-25 | 东莞新奥燃气有限公司 | Low-temperature natural gas recovery treatment device |
| CN110145686A (en) * | 2019-06-21 | 2019-08-20 | 蚌埠隆华压铸机有限公司 | A kind of CNG natural gas compressing recovery system |
| US10578249B2 (en) | 2015-12-14 | 2020-03-03 | Volvo Truck Corporation | Gas tank arrangement |
| CN112902554A (en) * | 2021-02-02 | 2021-06-04 | 南通职业大学 | Natural gas evaporation gas recovery reliquefaction device |
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| CN201284918Y (en) * | 2008-10-22 | 2009-08-05 | 苏州市金宏气体有限公司 | Low temperature gas reclamation plant |
| CN203421488U (en) * | 2013-07-22 | 2014-02-05 | 上海浦江特种气体有限公司 | Low-temperature liquid filling and gas recovery device |
| CN203585805U (en) * | 2013-08-22 | 2014-05-07 | 天津华迈燃气装备股份有限公司 | Natural gas flashing vapour recovery device of liquefied natural gas (LNG) liquid adding station |
| CN203731079U (en) * | 2014-01-14 | 2014-07-23 | 新地能源工程技术有限公司 | LNG (Liquefied Natural Gas) filling system for inland lake ship |
| CN203880390U (en) * | 2014-05-30 | 2014-10-15 | 杭州亿镨燃气设备有限公司 | Skid-mounted device for recovering released BOG (Boil Off Gas) in tank car and storage tank |
| CN204254255U (en) * | 2014-11-17 | 2015-04-08 | 蚌埠市金鹏燃气设备制造有限公司 | Evaporated natural gas recovering device |
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2014
- 2014-11-17 CN CN201410653572.XA patent/CN104390133A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201284918Y (en) * | 2008-10-22 | 2009-08-05 | 苏州市金宏气体有限公司 | Low temperature gas reclamation plant |
| CN203421488U (en) * | 2013-07-22 | 2014-02-05 | 上海浦江特种气体有限公司 | Low-temperature liquid filling and gas recovery device |
| CN203585805U (en) * | 2013-08-22 | 2014-05-07 | 天津华迈燃气装备股份有限公司 | Natural gas flashing vapour recovery device of liquefied natural gas (LNG) liquid adding station |
| CN203731079U (en) * | 2014-01-14 | 2014-07-23 | 新地能源工程技术有限公司 | LNG (Liquefied Natural Gas) filling system for inland lake ship |
| CN203880390U (en) * | 2014-05-30 | 2014-10-15 | 杭州亿镨燃气设备有限公司 | Skid-mounted device for recovering released BOG (Boil Off Gas) in tank car and storage tank |
| CN204254255U (en) * | 2014-11-17 | 2015-04-08 | 蚌埠市金鹏燃气设备制造有限公司 | Evaporated natural gas recovering device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806883A (en) * | 2015-05-22 | 2015-07-29 | 蚌埠市金鹏燃气设备制造有限公司 | Residual gas recovery device of natural gas tank car |
| US10578249B2 (en) | 2015-12-14 | 2020-03-03 | Volvo Truck Corporation | Gas tank arrangement |
| CN105605417A (en) * | 2016-01-08 | 2016-05-25 | 东莞新奥燃气有限公司 | Low-temperature natural gas recovery treatment device |
| CN110145686A (en) * | 2019-06-21 | 2019-08-20 | 蚌埠隆华压铸机有限公司 | A kind of CNG natural gas compressing recovery system |
| CN112902554A (en) * | 2021-02-02 | 2021-06-04 | 南通职业大学 | Natural gas evaporation gas recovery reliquefaction device |
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Application publication date: 20150304 |