CN203115497U - Residual gas recovery device for liquefied natural gas tanker - Google Patents
Residual gas recovery device for liquefied natural gas tanker Download PDFInfo
- Publication number
- CN203115497U CN203115497U CN 201220431184 CN201220431184U CN203115497U CN 203115497 U CN203115497 U CN 203115497U CN 201220431184 CN201220431184 CN 201220431184 CN 201220431184 U CN201220431184 U CN 201220431184U CN 203115497 U CN203115497 U CN 203115497U
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- valve
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- natural gas
- residual gas
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- 239000007789 gas Substances 0.000 title claims abstract description 84
- 238000011084 recovery Methods 0.000 title claims abstract description 15
- 239000003949 liquefied natural gas Substances 0.000 title abstract description 38
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000003345 natural gas Substances 0.000 claims abstract description 18
- 230000008676 import Effects 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 7
- 238000003860 storage Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 abstract 1
- 238000002309 gasification Methods 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 230000000737 periodic effect Effects 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 18
- 239000003921 oil Substances 0.000 description 10
- 230000033228 biological regulation Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model relates to a residual gas recovery device for a liquefied natural gas (LNG) tanker, which belongs to the technical field of low-temperature liquefied gas storage and transportation. The device comprises an LNG tanker, an N2 valve, a first valve, a second valve, an air temperature gasification heater, a third valve, a multistage natural gas compressor, a check valve, a fourth valve, a fifth valve, an intermediate-pressure gas storage tank, a pressure regulating and stabilizing device, a sixth valve, a vacuum pump, a seventh valve, a low-pressure gas storage tank, an eighth valve and a ninth valve, wherein the pressure of the intermediate-pressure gas storage tank is 1.6 MPa, the volume of the intermediate-pressure gas storage tank is 30 m<3>; the pressure of the low-pressure gas storage tank is 0.8 MPa, and the volume of the low-pressure gas storage tank is 30 m<3>; a control box of the multistage natural gas compressor is provided with a warning device; and natural gas which is regulated by the pressure regulating and stabilizing device is sent to a boiler as boiler fuel after the pressure of the natural gas reaches the pressure required by a boiler burner. According to the residual gas recovery device, residual gas in the LNG tanker is recovered through four stages, the recovery rate of the natural gas in the tanker can reach 100%, the purity of the natural gas is guaranteed in the process of recovery, and the residual gas processing problem for periodic inspection of the LNG tanker is fully solved. By successfully developing the device, the problem that the residual gas of the natural gas is directly discharged to influence the environment and safety is solved, the recovery of the residual gas of the natural gas is promoted, and the device has important and far-reaching effects on increasing economic benefits, reducing energy consumption and protecting the environment and has great economic benefits and social benefits.
Description
Technical field
The utility model relates to a kind of residual gas recovering device, and especially a kind of LNG Liquefied natural gas (LNG, Liquified Natural Gas) tank car residual gas recovering device belongs to liquefied gas at low temp storaging and transport technology field.
Background technique
Rock gas is as a kind of energy of cleaning, is the fuel that the future world of generally acknowledging generally adopts, and it is obvious with respect to " fossil fuel " Economy such as electric power, coal, fuel oils, price steadiness in addition, and the Natural Gas Demand amount climbs up and up in recent years.Analyze according to relevant department, the coming years are along with " enforcement and the extension of West-east Gas, " extra large gas lands ", " gas east, river is sent " engineerings such as " Russia send in gas south ", the demand of China's natural gas will be faster than coal and oil.According to the special ENERGY PLANNING of country, the proportion of rock gases in 2010 in energy aggregate demand constitutes is about 6%, and demand will reach 90,000,000,000 m
3, estimate that the year two thousand twenty demand will reach 2,000 hundred million m
3, eruptive growth will appear in the Natural Gas Demand of following China.Because LNG has unrivaled superiority than the compression rock gas at aspects such as storage, transportation, nimble property, therefore, LNG begins to be greatly developed in China.Matching used low-temperature pressure container such as LNG tank car, LNG basin, LNG cryogenic insulated cylinder etc. also obtain fast development with it.Therefore, for guaranteeing use safety and the security of operation of low-temperature pressure container, according to State General Administration for Quality Supervision's regulation, must carry out third pary certification to these containers.When third pary certification, the displacement of residual gas seems particularly important as the necessary condition of LNG tank car check to the processing of residual gas in the tank body.Present processing method one is that the rock gas residual gas directly is disposed in the air, by a LNG tank car tank body volume 50m
3, residual gas pressure 0.8MPa calculates, every needs to discharge rock gas 400Nm
3(not also having partially liq to count with the raise amount of discharging that gasify of temperature with central as yet), this certainly will pollute to environment, and can bring some unsafe factors; The 2nd, torch method (namely burning), the safety coefficient of this method want big, have overcome the pollution to environment, still are feasible in the unit that does not have raffinate, residual gas recovery plant, but require the environment harshness, and the difficulty that operates is very big.Utilize specific recovering device, directly discharge the problem that environment and safety are impacted with solving the rock gas residual gas, also will realize the effective recycling of LNG tank car residual gas, promote the safety energy-conserving environment protection of LNG tank car test stage, promote for the use of rock gas and to have profound significance, for the safety detection of LNG tank car provides strong guarantee.
In the prior art, the utility model patent of application number 201120287433.1 " pressurized container residual gas reclaiming system ", simple in structure, easy to use, it not only can reclaim residual gas, raffinate safely, carries out the secondary utilization, and has avoided environmental pollution, but used devices such as water pump, moisture separator in this cover system, these devices can not directly be used at low temperatures.Application number is the utility model patent of 200520021627.1 " sealed mode raffinate, residual gas reclaim washing unit ", compact structure, reasonable in design, easy to operate, time saving and energy saving, safe and reliable, environmentally safe, and can fully utilize, but this covering device is inapplicable to the LNG tank car, because the directly water filling in the storage tank of this device, this is unallowed for the LNG tank car.The utility model patent of application number 201010248020.2 " oil-gas recovery method in a kind of Railway tank car ", use water at atmospheric pressure absorption or water circulating vacuum pump to produce negative pressure absorption, water refrigerating machine group absorption technique again, excessive oil gas in the time of can effectively reclaiming the volatile class material of Railway tank car can, make cost recovery cheap relatively, simple to operate, and it is frequent to have overcome existing recovery technology replacing sorbent, causes labor intensity to become big defective.But this covering device only reaches more than 90% the recovery rate of organic materials, can not guarantee oil gas zero-emission in the Railway tank car, and this also can pollute environment, and can bring some unsafe factors.
The model utility content
For deficiency and the defective that overcomes prior art, the utility model provides a kind of residual gas recovering device, is used for the recovery of LNG tank car residual gas, and this device comprises LNG tank car, N
2Valve, first valve, second valve, air temperature type gasification-heater, the 3rd valve, multistage natural air compressor, one-way valve, the 4th valve, the 5th valve, middle pressure gas holder, voltage-regulating and voltage-stabilizing device, the 6th valve, vacuum pump, the 7th valve, low pressure gasholder, the 8th valve and the 9th valve.The pressure of middle pressure gas holder is 1.6MPa, and volume is 30m
3The pressure of low pressure gasholder is 0.8MPa, and volume is 30m
3On the control box of multistage natural air compressor warning device is arranged; One end of one-way valve links to each other with the outlet of compressor, and the other end links to each other with the import of middle pressure gas holder; Rock gas after voltage-regulating and voltage-stabilizing device is regulated, pressure reaches the desired pressure of boiler-burner and send boiler as boiler oil.
After the LNG tank car was delivered to the check scene, residual gas reclaimed and mainly is divided into following four-stage in the LNG tank car.Phase I: the residual gas in the LNG tank car is through air temperature type gasification-heater temperature after heating 〉=0 ℃, then enter the multistage natural air compressor and be pressurized to pressure≤1.6MPa, again through pressing gas holder to store in sending to behind the one-way valve, stored natural gas via voltage-regulating and voltage-stabilizing device pressure regulation then, pressure reaches the desired pressure of boiler-burner and gives boiler as boiler oil.When the inlet pressure of compressor drops to 0.05MPa, report to the police the chain shutdown of multistage natural air compressor, close compressor import and closing valve is arranged on the multistage natural air compressor control box.Second stage: operator inspect recovering device no abnormal after, open vacuum pump, extracting and deliver to the residue rock gas of 0.05MPa out low pressure gasholder by vacuum pump stores, stored natural gas via voltage-regulating and voltage-stabilizing device pressure regulation then, pressure reaches the desired pressure of boiler-burner and gives boiler as boiler oil.When the inlet pressure of vacuum pump be lower than-during 0.09MPa, the import solenoid valve of vacuum pump cuts out automatically, the end of bleeding.Phase III: when boiler did not need rock gas as boiler oil, low pressure gasholder can be filled with rock gas earlier, with the compression of the natural gas via multistage natural air compressor in the low pressure gasholder, entered into through one-way valve then and pressed gas holder to store.The quadravalence section: operator open N
2Valve, the infiltration to the LNG tank car fills nitrogen air when preventing vacuum guarantees safety, reach authorized pressure after, close N
2Valve, the whole recovery operation is finished.
The utility model LNG tank car residual gas recovering device can 100% reclaims the rock gas in the tank car, and has guaranteed the purity of rock gas in callback course, and the residual gas when fully solving the third pary certification of LNG tank car is handled problems.The research and development success of this covering device; directly discharge the problem that environment and safety are impacted with solving the rock gas residual gas; promote the recycling of rock gas residual gas; to increasing economic efficiency, reduce energy consumption, protecting environment to have important function and profound influence, have huge economic benefit and social benefit.
Description of drawings
Fig. 1 is the structure principle chart of the utility model LNG tank car residual gas recovering device.
Among the figure, the 1st, LNG tank car, the 2nd, N
2Valve, 3 is that first valve, 4 is second valves, the 5th, and air temperature type gasification-heater, 6 is the 3rd valves, the 7th, and multistage natural air compressor, the 8th, one-way valve, 9 are that the 4th valve, 10 is the 5th valves, the 11st, and middle pressure gas holder, the 12nd, voltage-regulating and voltage-stabilizing device, 13 are the 6th valves, the 14th, and vacuum pump, 15 is the 7th valves, the 16th, and low pressure gasholder, 17 is that the 8th valve and 18 is the 9th valves.
Embodiment:
Below in conjunction with accompanying drawing concrete enforcement of the present utility model is further described.
As shown in Figure 1, the utility model residual gas recovering device comprises: LNG tank car 1, N
2Valve 2, the first valves 3, the second valves 4, air temperature type gasification-heater 5, the three valves 6, multistage natural air compressor 7, one-way valve 8, the four valves 9, the five valves 10, middle gas holder 11, voltage-regulating and voltage-stabilizing device 12, the six valves 13 of pressing, vacuum pump 14, the 7th valve 15, low pressure gasholder 16, the eight valves 17 and the 9th valve 18.Pressing the pressure of gas holder 11 wherein is 1.6MPa, and volume is 30m
3The pressure of low pressure gasholder 16 is 0.8MPa, and volume is 30m
3On the control box of multistage natural air compressor 7 warning device is arranged; One end of one-way valve 8 links to each other with the outlet of multistage natural air compressor 7, and the other end links to each other with the import of middle pressure gas holder 11.
After LNG tank car 1 was delivered to the check scene, residual gas reclaimed and mainly is divided into following four-stage in the LNG tank car 1.Phase I: open first valve 3 and second valve 4, LNG tank car 1 is connected with air temperature type gasification-heater 5, through back temperature 〉=0 ℃ of residual gass of air temperature type gasification-heater 5, this moment, the 6th valve 13 was closed, the 3rd valve 6 is opened, then enter multistage natural air compressor 7 and be pressurized to pressure≤1.6MPa, again through pressing gas holder 11 to store in sending to behind one-way valve 8 and the 4th valve 9, open the 5th valve 10, stored then natural gas via is crossed voltage-regulating and voltage-stabilizing device 12 pressure regulation, and pressure reaches the desired pressure of boiler-burner and gives boiler as boiler oil.When the inlet pressure of multistage natural air compressor 7 drops to 0.05MPa; report to the police on multistage natural air compressor 7 control boxs; the 7 chain shutdown of multistage natural air compressor, multistage natural air compressor 7 import closed electromagnetic valves are closed 7 imports of multistage natural air compressor and closing valve are arranged simultaneously.Second stage: operator inspect recovering device no abnormal after, close the 3rd valve 6, open the 6th valve 13, then open vacuum pump 14, by vacuum pump 14 the residue rock gas of 0.05MPa is extracted out through the 7th valve 15 and delivered to low pressure gasholder 16 and store, open the 8th valve 17 and the 9th valve 18, stored natural gas via voltage-regulating and voltage-stabilizing device 12 pressure regulation then, pressure reaches the desired pressure of boiler-burner and gives boiler as boiler oil.When the inlet pressure of vacuum pump 14 be lower than-during 0.09MPa, the import solenoid valve of vacuum pump 14 cuts out automatically, the 6th valve 13, the 7th valve 15, the 8th valve 17 and the 9th valve 18 are closed in the end of bleeding.Phase III: when boiler does not need rock gas as boiler oil, low pressure gasholder 16 can be filled with rock gas earlier, open the 8th valve 17, with natural gas via multistage natural air compressor 7 compressions in the low pressure gasholder 16, enter into 11 storages of pressure gas holder through one-way valve 8 and the 4th valve 9 then.The quadravalence section: operator open N
2Valve 2, the infiltration to LNG tank car 1 fills nitrogen air when preventing vacuum guarantees safety, reach authorized pressure after, close N
2Valve 2, the whole recovery operation is finished.
Claims (4)
1. a LNG tank car residual gas recovering device comprises LNG tank car (1), N
2Valve (2), first valve (3), second valve (4), air temperature type gasification-heater (5), the 3rd valve (6), multistage natural air compressor (7), one-way valve (8), the 4th valve (9), the 5th valve (10), middle gas holder (11), voltage-regulating and voltage-stabilizing device (12), the 6th valve (13) of pressing, vacuum pump (14), the 7th valve (15), low pressure gasholder (16), the 8th valve (17) and the 9th valve (18), pressing the pressure of gas holder (11) in it is characterized in that is 1.6MPa, volume is 30m
3, the pressure of low pressure gasholder (16) is 0.8MPa, volume is 30m
3, an end of one-way valve (8) links to each other with the outlet of multistage natural air compressor (7), and the other end links to each other with the import of middle pressure gas holder (11).
2. LNG tank car residual gas recovering device according to claim 1 is characterized in that on the control box of described multistage natural air compressor (7) warning device being arranged.
3. LNG tank car residual gas recovering device according to claim 1 and 2 is characterized in that the interior residual gas recovery of described LNG tank car (1) is divided into four-stage and carries out.
4. LNG tank car residual gas recovering device according to claim 1 and 2, after it is characterized in that described middle natural gas via voltage-regulating and voltage-stabilizing device (12) adjusting of pressing in gas holder (11) and the low pressure gasholder (16), pressure reaches the desired pressure of boiler-burner and send boiler as boiler oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220431184 CN203115497U (en) | 2012-08-28 | 2012-08-28 | Residual gas recovery device for liquefied natural gas tanker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220431184 CN203115497U (en) | 2012-08-28 | 2012-08-28 | Residual gas recovery device for liquefied natural gas tanker |
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| Publication Number | Publication Date |
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| CN203115497U true CN203115497U (en) | 2013-08-07 |
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| CN 201220431184 Expired - Fee Related CN203115497U (en) | 2012-08-28 | 2012-08-28 | Residual gas recovery device for liquefied natural gas tanker |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386711A (en) * | 2018-03-29 | 2018-08-10 | 宁波富德能源有限公司 | A kind of method of propylene tank water filling recycling gas phase |
| CN111377387A (en) * | 2020-06-01 | 2020-07-07 | 湖南省特种设备检验检测研究院 | Treatment system and method for dangerous chemical residues of tank truck |
| CN113091818A (en) * | 2021-04-06 | 2021-07-09 | 宁夏弘茂特种设备检验检测有限公司 | LNG raffinate recovery unit |
| CN113188038A (en) * | 2021-05-27 | 2021-07-30 | 聊城鲁西多元醇新材料科技有限公司 | Liquefied hydrocarbon storage tank replacement gas recovery device and method and application thereof |
-
2012
- 2012-08-28 CN CN 201220431184 patent/CN203115497U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386711A (en) * | 2018-03-29 | 2018-08-10 | 宁波富德能源有限公司 | A kind of method of propylene tank water filling recycling gas phase |
| CN111377387A (en) * | 2020-06-01 | 2020-07-07 | 湖南省特种设备检验检测研究院 | Treatment system and method for dangerous chemical residues of tank truck |
| CN111377387B (en) * | 2020-06-01 | 2020-08-18 | 湖南省特种设备检验检测研究院 | Treatment system and method for dangerous chemical residues of tank truck |
| CN113091818A (en) * | 2021-04-06 | 2021-07-09 | 宁夏弘茂特种设备检验检测有限公司 | LNG raffinate recovery unit |
| CN113188038A (en) * | 2021-05-27 | 2021-07-30 | 聊城鲁西多元醇新材料科技有限公司 | Liquefied hydrocarbon storage tank replacement gas recovery device and method and application thereof |
| CN113188038B (en) * | 2021-05-27 | 2023-02-21 | 聊城鲁西多元醇新材料科技有限公司 | Liquefied hydrocarbon storage tank replacement gas recovery device and method and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Chen Shujun Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20150828 |