CN1510328A - Zero-discharge liquefied natural gas tank - Google Patents
Zero-discharge liquefied natural gas tank Download PDFInfo
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- CN1510328A CN1510328A CNA021579768A CN02157976A CN1510328A CN 1510328 A CN1510328 A CN 1510328A CN A021579768 A CNA021579768 A CN A021579768A CN 02157976 A CN02157976 A CN 02157976A CN 1510328 A CN1510328 A CN 1510328A
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- heat exchanger
- storage tank
- natural gas
- liquefied natural
- liquid nitrogen
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Abstract
A liquefied natural gas storage tank without exhaust is dischosed. A low-temp storage tank containing a recondensing heat exchanger full of liquefied nitrogen is used to condense the natural gas to become liquid and exhausting N2. It features that said recondensing heat exchanger in the low temp storage tank has an inlet tube connected to a liquefied nitrogen tank outside the low-temp storage tank and outlet tube connected with the liquefied nitrogen separator outside the low-temp storage tank, and the lower end of a recondensing controller fixed to the insulating top cover of low-temp storage tank is in the low-temp storage tank. Said recondensing controller is a pressure sensing controller.
Description
Technical field
The present invention relates to a kind of refrigerated storage tank device of LNG Liquefied natural gas, particularly a kind of basin device of zero-emission LNG Liquefied natural gas.
Background technique
At present, all there is the evaporation of leaking the hot cryogenic liquide that causes in the basin device of common LNG Liquefied natural gas, and the natural gas liquid evacuator body in the basin can cause the basin internal pressure to rise, when gas pressure reached setting value in the basin, common LNG Liquefied natural gas basin device discharged by the overvoltage escape cock.Like this, both waste about 0.2% rock gas, caused environmental pollution again, also had flammable potential safety hazard.The basin device of common LNG Liquefied natural gas all can not overcome the problem that the evaporation of LNG Liquefied natural gas brings.
Summary of the invention
The objective of the invention is to reclaim the loss that causes of natural gas vaporization for the basin device that overcomes existing LNG Liquefied natural gas, and overvoltage the discharging environmental pollution and the flammable potential safety hazard that cause, thereby provide a kind of basin device of zero-emission LNG Liquefied natural gas.
The object of the present invention is achieved like this: the basin device of zero-emission LNG Liquefied natural gas of the present invention is to install additional to coagulate heat exchanger again and again in refrigerated storage tank, utilizes liquid nitrogen that rock gas steam is carried out condensation, and the rock gas displacement is become nitrogen discharge.As shown in Figure 1, this device comprises a refrigerated storage tank, it is characterized in that: the inner placement of refrigerated storage tank coagulated heat exchanger again, and the connection of the inlet tube of heat exchanger is positioned at the outer liquid nitrogen tank of refrigerated storage tank with fixed attention again, and the outer pipe that coagulates heat exchanger again is communicated with the liquid nitrogen separator that is positioned at outside the refrigerated storage tank.Coagulate controller again and again and be fixed on the adiabatic top cover of refrigerated storage tank, its lower end is positioned at refrigerated storage tank; It is described that to coagulate heat exchanger again be tubular heat exchanger, coil exchanger, plate type heat exchanger or the tubular heat exchanger that is emitting shape; Described material of coagulating heat exchanger again is welding material; Described to coagulate controller again be the pressure sensing controller, and what the breakout pressure of this pressure sensing controller was lower than refrigerated storage tank plays valve pressure, and its clossing pressure is 0.1-0.5MPa; Described liquid nitrogen separator is cool-bag or low temperature insulation container made, and the nitrogen discharge valve that a nitrogen reflux pipe and a cracking pressure are micro positive pressure is housed on it, and nitrogen reflux Guan Yuzai coagulates heat exchanger exit and is connected, and its bottom is apart from 2-3 centimetre of liquid nitrogen separator bottom; Described liquid nitrogen separator, the connecting tube that coagulates between heat exchanger and the liquid nitrogen tank again are the pipeline of heat-insulated pipe or parcel heat insulation layer.
The invention has the advantages that: this device can be recycled the evaporating loss of liquid natural gas, has saved the energy; And, avoided the basin device overvoltage discharging of LNG Liquefied natural gas to cause environmental pollution, and the potential safety hazard that causes; This apparatus structure is simple, with low cost, has realized the zero-emission of rock gas.
Description of drawings
Fig. 1 is the structural representation of the basin device of a kind of LNG Liquefied natural gas of the present invention
Fig. 2 is the plan view that coagulates heat exchanger again in the basin device of a kind of LNG Liquefied natural gas of the present invention
Fig. 3 coagulates the heat exchanger left view in the basin device of a kind of LNG Liquefied natural gas of the present invention again
The accompanying drawing sign
1, refrigerated storage tank 2, adiabatic top cover 3, coagulate the heat exchanger inlet tube again
4, coagulate again heat exchanger 5, again coagulate heat exchanger exit pipe 6, coagulate controller again
7, overvoltage safety dumping valve 8, liquid nitrogen delivery pipe 9, liquid nitrogen separator
10, nitrogen reflux pipe 11, nitrogen discharge valve 13, liquid nitrogen tank
Embodiment
Make the basin device of a zero-emission LNG Liquefied natural gas.As shown in Figure 1, refrigerated storage tank 1 inside is placed and is coagulated heat exchanger 4 again, and the inlet tube 3 of heat exchanger is communicated with the liquid nitrogen tank 13 that is positioned at outside the refrigerated storage tank 1 with fixed attention again, and the outer pipe 5 that coagulates heat exchanger again is communicated with the liquid nitrogen separator 9 that is positioned at outside the refrigerated storage tank 1; Coagulate controller 6 again and be fixed on the adiabatic top cover 2 of refrigerated storage tank 1, its lower end is positioned at refrigerated storage tank 1.
In the present embodiment, liquid nitrogen tank 13 is direct liquid nitrogen containers from market purchasing; Coagulate heat exchanger 4 again and be one and be the red copper tubular heat exchanger that emitting shape is arranged, as shown in Figure 2, the inlet tube 3 and the outer pipe 5 that coagulate heat exchanger again are welded on the adiabatic top cover 2, inlet tube 3 and 8 flange couplings of liquid nitrogen delivery pipe, and outer pipe 5 connects with nitrogen reflux pipe 10; Coagulating controller 6 again is that a model is a CEMPX-4 pressure sensing controller, is welded on the adiabatic top cover 2, and its lower end is stretched in the refrigerated storage tank 1; Liquid nitrogen separator 9 is cool-bags, and the nitrogen reflux pipe 10 on it guarantees nitrogen that refluxes and the drop gas-liquid separation of carrying thereof apart from 2 centimetres of container bottom, and the cracking pressure of the nitrogen discharge valve 11 on the liquid nitrogen separator 9 is 0.12MPa; Above-mentioned pipeline all is the conventional insulation pipe from market purchasing.
Utilize embodiment 1 device, the direct displacement of rock gas steam is become nitrogen discharge.Natural gas liquids causes gas pressure to raise owing to leak thermal evaporation rate, when rock gas air cushion pressure in the natural gas-reservoir jar 1 reaches predefined breakout pressure 1.2MPa (the valve pressure P 3 that rises of the overvoltage safety dumping valve setting of rock gas basin is 1.6MPa), coagulate controller 6 again and liquid nitrogen is fed heat exchanger 6 with fixed attention again by the cryopump of controlling liquid nitrogen tank 13, after being condensated into liquid, rock gas flows back in the natural gas liquids along the heat exchanger outer wall, when the rock gas air cushion pressure is reduced to predefined clossing pressure 0.3MPa, coagulates controller 6 again and stop the liquid nitrogen transfusion; This process is gone round and begun again.When because liquid nitrogen supply disconnection or other reasons when causing overpressure liquid nitrogen tank 13 in, the nitrogen discharge valve 11 of liquid nitrogen tank 13 is opened, discharging nitrogen, and the pressure answer in liquid nitrogen tank 13 just often this valve is closed.
Claims (6)
1, a kind of basin device of zero-emission LNG Liquefied natural gas, this device comprises a refrigerated storage tank, it is characterized in that: the inner placement of refrigerated storage tank coagulated heat exchanger again, the inlet tube that coagulates heat exchanger again is communicated with the liquid nitrogen tank that is positioned at outside the refrigerated storage tank, and the outer pipe connection of coagulating heat exchanger again is positioned at the outer liquid nitrogen separator of refrigerated storage tank; Coagulate controller again and again and be fixed on the adiabatic top cover of refrigerated storage tank, its lower end is positioned at refrigerated storage tank.
2, according to the basin device of the described zero-emission LNG Liquefied natural gas of claim 1, it is characterized in that: described to coagulate heat exchanger again be tubular heat exchanger, coil exchanger, plate type heat exchanger or the tubular heat exchanger that is emitting shape.
3, according to the basin device of the described zero-emission LNG Liquefied natural gas of claim 1, it is characterized in that: described material of coagulating heat exchanger again is welding material.
4, according to the basin device of the described zero-emission LNG Liquefied natural gas of claim 1, it is characterized in that: described to coagulate controller again be the pressure sensing controller, the breakout pressure of this pressure sensing controller is lower than a valve pressure of refrigerated storage tank, and its clossing pressure is 0.1-0.5MPa.
5, according to the basin device of the described zero-emission LNG Liquefied natural gas of claim 1, it is characterized in that: described liquid nitrogen separator is cool-bag or low temperature insulation container made, the nitrogen discharge valve that a nitrogen reflux pipe and a cracking pressure are micro positive pressure is housed on it, nitrogen reflux Guan Yuzai coagulates heat exchanger exit and is connected, and its bottom is apart from 2-3 centimetre of liquid nitrogen separator bottom.
6, according to the basin device of the described zero-emission LNG Liquefied natural gas of claim 1, it is characterized in that: described liquid nitrogen separator, the connecting tube that coagulates between heat exchanger and the liquid nitrogen tank again are the pipeline of heat-insulated pipe or parcel heat insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021579768A CN1510328A (en) | 2002-12-20 | 2002-12-20 | Zero-discharge liquefied natural gas tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021579768A CN1510328A (en) | 2002-12-20 | 2002-12-20 | Zero-discharge liquefied natural gas tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1510328A true CN1510328A (en) | 2004-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021579768A Pending CN1510328A (en) | 2002-12-20 | 2002-12-20 | Zero-discharge liquefied natural gas tank |
Country Status (1)
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| CN (1) | CN1510328A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858683A (en) * | 2010-04-30 | 2010-10-13 | 浙江大学 | System for producing liquefied natural gas by utilizing liquid nitrogen cold energy |
| CN102261560A (en) * | 2011-06-29 | 2011-11-30 | 中国寰球工程公司 | Boil-off gas zero emission system and method |
| CN103742784A (en) * | 2014-01-18 | 2014-04-23 | 福州大学 | Liquefied natural gas storage tank zero-emission device and process |
| CN105465603A (en) * | 2015-11-15 | 2016-04-06 | 苟仲武 | Method capable of lowering evaporation consumption during transportation of liquid or solid gas |
| CN105570663A (en) * | 2016-02-19 | 2016-05-11 | 新奥科技发展有限公司 | LNG (Liquefied Natural Gas) storage tank assembly and LNG temperature control method |
| CN105627096A (en) * | 2015-09-11 | 2016-06-01 | 荆门宏图特种飞行器制造有限公司 | LNG storage tank |
| CN107726039A (en) * | 2017-10-20 | 2018-02-23 | 广东锐捷安全技术股份有限公司 | A kind of container group for liquid gas low-temperature storage |
| CN110081303A (en) * | 2019-05-17 | 2019-08-02 | 中国科学院理化技术研究所 | A kind of liquefied gas storage device |
-
2002
- 2002-12-20 CN CNA021579768A patent/CN1510328A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858683A (en) * | 2010-04-30 | 2010-10-13 | 浙江大学 | System for producing liquefied natural gas by utilizing liquid nitrogen cold energy |
| CN102261560A (en) * | 2011-06-29 | 2011-11-30 | 中国寰球工程公司 | Boil-off gas zero emission system and method |
| CN102261560B (en) * | 2011-06-29 | 2013-04-24 | 中国寰球工程公司 | Boil-off gas zero emission system and method |
| CN103742784A (en) * | 2014-01-18 | 2014-04-23 | 福州大学 | Liquefied natural gas storage tank zero-emission device and process |
| CN103742784B (en) * | 2014-01-18 | 2015-09-09 | 福州大学 | A kind of liquefied natural gas (LNG) tank Zero emission device and technique thereof |
| CN105627096A (en) * | 2015-09-11 | 2016-06-01 | 荆门宏图特种飞行器制造有限公司 | LNG storage tank |
| CN105465603A (en) * | 2015-11-15 | 2016-04-06 | 苟仲武 | Method capable of lowering evaporation consumption during transportation of liquid or solid gas |
| CN105570663A (en) * | 2016-02-19 | 2016-05-11 | 新奥科技发展有限公司 | LNG (Liquefied Natural Gas) storage tank assembly and LNG temperature control method |
| CN107726039A (en) * | 2017-10-20 | 2018-02-23 | 广东锐捷安全技术股份有限公司 | A kind of container group for liquid gas low-temperature storage |
| CN110081303A (en) * | 2019-05-17 | 2019-08-02 | 中国科学院理化技术研究所 | A kind of liquefied gas storage device |
| CN110081303B (en) * | 2019-05-17 | 2024-04-19 | 中国科学院理化技术研究所 | Liquefied gas storage device |
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |