CN103822091A - Natural gas recycling method for compressed natural gas stations - Google Patents

Natural gas recycling method for compressed natural gas stations Download PDF

Info

Publication number
CN103822091A
CN103822091A CN201310492965.2A CN201310492965A CN103822091A CN 103822091 A CN103822091 A CN 103822091A CN 201310492965 A CN201310492965 A CN 201310492965A CN 103822091 A CN103822091 A CN 103822091A
Authority
CN
China
Prior art keywords
gas
natural gas
knock out
out drum
rock gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201310492965.2A
Other languages
Chinese (zh)
Inventor
王全国
武志峰
刘昌华
张广文
党文义
韩中枢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petroleum and Chemical Corp
Sinopec Qingdao Safety Engineering Institute
Original Assignee
China Petroleum and Chemical Corp
Sinopec Qingdao Safety Engineering Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Petroleum and Chemical Corp, Sinopec Qingdao Safety Engineering Institute filed Critical China Petroleum and Chemical Corp
Priority to CN201310492965.2A priority Critical patent/CN103822091A/en
Publication of CN103822091A publication Critical patent/CN103822091A/en
Pending legal-status Critical Current

Links

Images

Abstract

The invention relates to a natural gas recycling method for compressed natural gas stations, and mainly solves the problems that in the prior art, natural gas is wasted and environmental pollution is caused. The natural gas recycling method well solves the problems by adopting the technical scheme that natural gas from a recycling pipeline is divided into at least two paths after passing through a gas collecting main pipe, one path is emptied through an emptying pipeline, the other path enters a buffer tank, the natural gas from the buffer tank is fed into a compressor, and when the pressure of the recycling pipeline is reduced to be consistent with that of a gas pipeline in front of the compressor, a control valve of the emptying pipeline is opened to empty the natural gas. The method can be applied to compressed natural gas stations.

Description

CNG Filling Station rock gas recoverying and utilizing method
Technical field
The present invention relates to a kind of CNG Filling Station rock gas recoverying and utilizing method.
Technical background
In current CNG Filling Station, adding after gas to automobile gas cylinder, in the pipeline between rifle head and the control valve of air filling gun, also has the remaining rock gas that about 1-2 power of boosting is 20MPa.For fear of causing danger, conventionally by this section of gas emptying to atmosphere, take off air filling gun, aerating process is just calculated end.Rock gas, as a kind of hazardous chemical, has inflammable and explosive feature, and discharge, easily in field, gas station station inner accumulated, forms major safety risks repeatedly.Rock gas, as a kind of non-renewable energy, directly discharges atmosphere and has caused the serious wasting of resources, and in addition, methane is as a kind of greenhouse gases, and its discharge also damages the ozone layer, befouling environment.
Aspect economic benefit, although each discharge amount is little, because the filling frequency of rock gas is very high, therefore residual gas still has the value of recycling.Calculating shows, length is about the air filling gun rifle head that 400mm, internal diameter 8mm, pressure are 20MPa, and the rock gas volume of its storage is about 6 liters under standard state, for a standard natural gas filling station, calculate by 1200 automobiles of aerating every day, the rock gas being discharged in atmosphere is about 2600m 3/ year, total amount is more considerable.Press 4.5 yuan/m of natural gas used for automobile price 3calculate, if can reclaim 80%, can increase every year nearly ten thousand yuan of benefits.
Based on more than, development of natural gas reclaiming system, not only can reduce potential safety hazard and reduce environmental pollution can also produce certain economic benefit.
Along with the raising of Environmental Protection in China requirement and being on the increase of CNG Filling Station, be a kind of inevitable trend by directly reclaiming discharged to the rock gas of atmosphere.
CN101975336A has proposed the rock gas of recovery to access fluid-tight isolation caisson or a unidirectional separation valve door by gas gathering manifold, then rock gas is sent in mesolow gas holder or pipeline network of fuel gas in city in, the ducted method of low-pressure fuel gas, this reclaiming system has adopted the fluid-tight isolation caisson of complicated structure, operation maintenance trouble, invest greatlyr, complicated design has increased the potential safety hazard in natural gas station in addition.
Summary of the invention
Technical problem to be solved by this invention is the problem of rock gas waste, befouling environment in prior art, and a kind of new CNG Filling Station rock gas recoverying and utilizing method is provided.The method, for CNG Filling Station, has advantages of that rock gas makes full use of, greatly reduces the pollution to environment.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows: a kind of CNG Filling Station rock gas recoverying and utilizing method, the natural gas via gas gathering manifold coming from recovery line, be divided at least two-way, one tunnel is through blow-down pipe emptying, another road enters knock out drum, enters compressor from knock out drum rock gas out; When recovery line pressure decreased is when consistent with gas line pressure before compressor, blow-down pipe control valve is opened, rock gas emptying.
In technique scheme, preferably, the operational condition of described knock out drum: temperature is normal temperature to 90 ℃, and pressure is counted normal pressure to 25MPa with gauge pressure.
In technique scheme, preferably, described knock out drum top is provided with safety valve.
In technique scheme, preferably, between described gas gathering manifold and knock out drum, be provided with one-way valve.
In technique scheme, preferably, the described rock gas that enters compressor or come from gas gathering manifold from natural gas via excess pressure regulator out of knock out drum regulates regulates through pressure regulator entering knock out drum.
In technique scheme, preferably, described knock out drum can utilize the existing knock out drum before compressed natural gas filling mother station and standard station inner compressor.
In technique scheme, preferably, after can mixing with the rock gas that gas station internal pressure-regulating metering system or desulphurization system are come the described natural gas via excess pressure regulator coming from gas gathering manifold regulates, enter knock out drum.
The present invention is by the method for knock out drum before air filling gun being added to residual gas after gas and carrying out centralized recovery and be incorporated to existing gas station compressor; effectively reclaim the rock gas of emptying originally; both avoided the wasting of resources; reduce potential safety hazard; protect again environmental pollution; and can create certain economic benefit, obtain good technique effect.
Accompanying drawing explanation
Fig. 1 is one of schematic flow sheet of the method for the invention.
In Fig. 1,1 is gas gathering manifold, and 2 is blowdown piping, and 3 is control valve, and 4 is unidirectional separation valve door, and 5 is safety valve, and 6 is knock out drum, and 7 is pressure regulator valve, and 8 for removing the gas line of compressor.
Fig. 2 be the method for the invention schematic flow sheet two.
In Fig. 2,1 is gas gathering manifold, and 2 is blowdown piping, and 3 is control valve, and 4 is unidirectional separation valve door, and 5 is gas station internal pressure-regulating metering system or desulphurization system, and 6 is knock out drum, and 7 is pressure regulator valve, and 8 for removing the gas line of compressor.
Below by embodiment, the invention will be further elaborated, but be not limited only to the present embodiment.
Embodiment
[embodiment 1]
Fig. 1 is one of schematic flow sheet of the method for the invention, import gas gathering manifold 1 from the gas that comes of air filling gun blow-down pipe, now, control valve 3 on blowdown piping 2 is closed, the unidirectional separation valve door 4 of natural gas via reclaiming enters after knock out drum 6 bufferings, enters natural gas compressor through pressure regulator 7 by unidirectional separation valve door.Knock out drum 6 operational conditions are: temperature is normal temperature, and pressure is counted normal pressure with gauge pressure.When recovery line pressure decreased is when consistent with gas line pressure before compressor, control valve 3 is opened, and residual gas emptying completes callback course one time.
[embodiment 2]
According to condition and step described in embodiment 1, import gas gathering manifold 1 from the gas that comes of air filling gun blow-down pipe, now, control valve 3 on blowdown piping 2 is closed, the unidirectional separation valve door 4 of natural gas via reclaiming enters after knock out drum 6 bufferings, enters natural gas compressor through pressure regulator 7 by unidirectional separation valve door.Knock out drum 6 operational conditions are: temperature is 90 ℃, and pressure is counted 25MPa with gauge pressure.When recovery line pressure decreased is when consistent with gas line pressure before compressor, control valve 3 is opened, and residual gas emptying completes callback course one time.
[embodiment 3]
Fig. 2 be the method for the invention schematic flow sheet two, import gas gathering manifold 1 from the gas that comes of air filling gun blow-down pipe, now, control valve 3 on blowdown piping 2 is closed, the unidirectional separation valve door 4 of natural gas via reclaiming, after knock out drum before pressure regulator 7 enters compressor 6 buffering, enters compressor together with the rock gas of coming with pressure regulation metering system or desulphurization system 5.Knock out drum 6 operational conditions are: temperature is 50 ℃, and pressure is counted 10MPa with gauge pressure.When recovery line pressure decreased is when consistent with gas line pressure before compressor, control valve 3 is opened, and residual gas emptying completes callback course one time.

Claims (7)

1. a CNG Filling Station rock gas recoverying and utilizing method, is divided at least two-way the natural gas via gas gathering manifold coming from recovery line, and a road is through blow-down pipe emptying, and another road enters knock out drum, enters compressor from knock out drum rock gas out; When recovery line pressure decreased is when consistent with gas line pressure before compressor, blow-down pipe control valve is opened, rock gas emptying.
2. CNG Filling Station rock gas recoverying and utilizing method according to claim 1, is characterized in that the operational condition of described knock out drum: temperature is normal temperature to 90 ℃, and pressure is counted normal pressure to 25MPa with gauge pressure.
3. CNG Filling Station rock gas recoverying and utilizing method according to claim 1, is characterized in that described knock out drum top is provided with safety valve.
4. CNG Filling Station rock gas recoverying and utilizing method according to claim 1, is characterized in that being provided with one-way valve between described gas gathering manifold and knock out drum.
5. CNG Filling Station rock gas recoverying and utilizing method according to claim 1, is characterized in that the described rock gas that enters compressor or come from gas gathering manifold from knock out drum natural gas via excess pressure regulator out regulates regulates through pressure regulator entering knock out drum.
6. CNG Filling Station rock gas recoverying and utilizing method according to claim 1, is characterized in that described knock out drum can utilize the existing knock out drum before compressed natural gas filling mother station and standard station inner compressor.
7. CNG Filling Station rock gas recoverying and utilizing method according to claim 1, enters knock out drum after it is characterized in that can mixing with the rock gas that gas station internal pressure-regulating metering system or desulphurization system are come the described natural gas via excess pressure regulator coming from gas gathering manifold regulates.
CN201310492965.2A 2013-10-18 2013-10-18 Natural gas recycling method for compressed natural gas stations Pending CN103822091A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310492965.2A CN103822091A (en) 2013-10-18 2013-10-18 Natural gas recycling method for compressed natural gas stations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310492965.2A CN103822091A (en) 2013-10-18 2013-10-18 Natural gas recycling method for compressed natural gas stations

Publications (1)

Publication Number Publication Date
CN103822091A true CN103822091A (en) 2014-05-28

Family

ID=50757293

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310492965.2A Pending CN103822091A (en) 2013-10-18 2013-10-18 Natural gas recycling method for compressed natural gas stations

Country Status (1)

Country Link
CN (1) CN103822091A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107270121A (en) * 2017-06-06 2017-10-20 大唐贵州发耳发电有限公司 A kind of hydric safe gas exhaust piping device
US10578249B2 (en) 2015-12-14 2020-03-03 Volvo Truck Corporation Gas tank arrangement
CN111042773A (en) * 2019-12-21 2020-04-21 山西晋城无烟煤矿业集团有限责任公司 Low-pressure coal bed gas well emptying and recycling linkage device
CN112524481A (en) * 2021-02-07 2021-03-19 河南氢枫能源技术有限公司 System for recovering vent gas of hydrogenation station
CN113048399A (en) * 2021-03-17 2021-06-29 四川京川大正油田技术服务有限责任公司 Method for recovering residual natural gas in machine cavity and pipeline after compressor shutdown

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070193648A1 (en) * 2003-10-10 2007-08-23 Grantham Rodger P Vapor recovery system with improved orvr compatibility and performance
CN101975336A (en) * 2010-11-16 2011-02-16 罗东晓 Valve, system and method for evacuating gas in gas filling hose used for recycling high pressure gas
CN202252840U (en) * 2011-10-26 2012-05-30 山东省特种设备检验研究院滨州分院 Recycling and replacing device for automotive natural gas bottle
CN102913756A (en) * 2012-10-25 2013-02-06 泉州市燃气有限公司 Residual gas recovery system of gas station compressor
CN203131417U (en) * 2013-03-12 2013-08-14 北京普发兴业动力科技发展有限责任公司 Skid-mounted type self-powered LNG (liquefied natural gas) filling station with BOG (boiled off gas) recovery function

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070193648A1 (en) * 2003-10-10 2007-08-23 Grantham Rodger P Vapor recovery system with improved orvr compatibility and performance
CN101975336A (en) * 2010-11-16 2011-02-16 罗东晓 Valve, system and method for evacuating gas in gas filling hose used for recycling high pressure gas
CN202252840U (en) * 2011-10-26 2012-05-30 山东省特种设备检验研究院滨州分院 Recycling and replacing device for automotive natural gas bottle
CN102913756A (en) * 2012-10-25 2013-02-06 泉州市燃气有限公司 Residual gas recovery system of gas station compressor
CN203131417U (en) * 2013-03-12 2013-08-14 北京普发兴业动力科技发展有限责任公司 Skid-mounted type self-powered LNG (liquefied natural gas) filling station with BOG (boiled off gas) recovery function

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10578249B2 (en) 2015-12-14 2020-03-03 Volvo Truck Corporation Gas tank arrangement
CN107270121A (en) * 2017-06-06 2017-10-20 大唐贵州发耳发电有限公司 A kind of hydric safe gas exhaust piping device
CN111042773A (en) * 2019-12-21 2020-04-21 山西晋城无烟煤矿业集团有限责任公司 Low-pressure coal bed gas well emptying and recycling linkage device
CN111042773B (en) * 2019-12-21 2021-11-12 山西晋城无烟煤矿业集团有限责任公司 Low-pressure coal bed gas well emptying and recycling linkage device
CN112524481A (en) * 2021-02-07 2021-03-19 河南氢枫能源技术有限公司 System for recovering vent gas of hydrogenation station
CN112524481B (en) * 2021-02-07 2021-06-01 河南氢枫能源技术有限公司 System for recovering vent gas of hydrogenation station
CN113048399A (en) * 2021-03-17 2021-06-29 四川京川大正油田技术服务有限责任公司 Method for recovering residual natural gas in machine cavity and pipeline after compressor shutdown

Similar Documents

Publication Publication Date Title
CN203082530U (en) L-CNG (liquefied-compressed natural gas) station
CN103822091A (en) Natural gas recycling method for compressed natural gas stations
CN103672394B (en) A kind of without pump LNG refueling system and LNG Liquefied natural gas processing method
CN203500850U (en) Movable type storage, transportation and pressure reduction device for compressed natural gas
CN204548515U (en) A kind of aircraft zero minusg fuel feeding pressure charging system
CN105090738A (en) Multi-functional natural gas and hydrogen mixing gas station and filling method
CN103822093A (en) Natural gas adsorptive recycling method for compressed natural gas station
CN101793347A (en) Gas filling station
CN209495135U (en) One kind plus hydrogen oiling hybrid station
CN203615063U (en) Recycle device of residual liquid of LNG (Liquefied Natural Gas) transport vehicle
CN202812779U (en) CNG (Compressed Natural Gas) pipe-bundle container
CN102913756B (en) Residual gas recovery system of gas station compressor
CN102425725A (en) System and method for reclaiming boil off gas (BOG) in liquefied natural gas (LNG) storage tank
CN103438354A (en) Liquefied natural gas filling station BOG utilization system
CN202327654U (en) System for recycling boil-off gas (BOG) in liquefied natural gas (LNG) storage tank
CN206669315U (en) A kind of band helping air supply function CNG routines gas station
CN204437709U (en) The uninterrupted pressure regulation heat-exchanger rig of a kind of CNG
CN202812794U (en) Compressor residual gas recovery system of gas station
CN204153459U (en) A kind of LNG automobile gas injection device with high efficiente callback function
CN206036665U (en) A natural gas recovery system for car steel bottle
CN203431497U (en) BOG utilization system for liquefied natural gas refilling station
CN201093176Y (en) Intelligent natural gas filling substation
CN204403773U (en) A kind of LNG refueling gas recovery system
CN217875329U (en) Purging and replacing system of hydrogen energy residual gas recovery equipment
CN204852908U (en) LNG car air entrainment waste gas recovery system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C12 Rejection of a patent application after its publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20140528