CN104033726A - Self-pressurization automatic control LNG skid-mounted station - Google Patents
Self-pressurization automatic control LNG skid-mounted station Download PDFInfo
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- CN104033726A CN104033726A CN201410313819.3A CN201410313819A CN104033726A CN 104033726 A CN104033726 A CN 104033726A CN 201410313819 A CN201410313819 A CN 201410313819A CN 104033726 A CN104033726 A CN 104033726A
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Abstract
The invention relates to a self-pressurization automatic control LNG skid-mounted station and belongs to the technical field of LNG filling. The self-pressurization automatic control LNG skid-mounted station comprises an LNG liquid discharging part, a filling part, an LNG storage tank self-pressurization part and a corresponding control part. The LNG liquid discharging part is composed of a discharged liquid receiving port, a top liquid inlet valve, a bottom liquid inlet valve and a pipeline; the LNG storage tank self-pressurization part achieves self-pressurization through an LNG storage tank and achieves unattended LNG filling service through a pipeline and a valve which are connected by the adoption of automatic control of a PLC; the filling part comprises an electrically operated valve, a pipeline and a flow meter; the control part comprises a PLC system, an electrically operated valve, a liquid level sensor, a pressure sensor and a temperature sensor; electricity is generated through solar energy and/or wind power, and the LNG skid-mounted station does not need a power source. An automobile driver can achieve self-help LNG filling and automatic charging by swiping a card, automobile LNG filling service can be continuously and safely provided for areas without power supplies, and LNG automobiles can be conveniently and widely applied.
Description
Technical field
The present invention relates to a kind of LNG(LNG Liquefied natural gas) skid gas station, specifically a kind of realization without ABAP Adapter, automatic control system pressure, unattended LNG skid station.
Background technique
Traditional LNG skid station, the import cryopump supercharging by being connected with LNG tank bottom, needs professional workforce that aerating service is provided for it; In addition, cryopump price compared with high, power consumption is large, system process is complicated, because remote districts cannot provide electrical source of power, thus restriction LiaoLNG gas station development.In a word, traditional aerating mode cannot realize LNG skid station system automatically, telecontrol.
Summary of the invention
Low in order to solve current LNG skid station automatic degree, pressurization difficulty, the problem that energy consumption is large, the invention provides and a kind ofly from supercharging, automatically control LNG skid station, object is to cancel LNG skid gas station, and the outside powerful device (cryopump, air compressor and pressure-increasing machine etc.) that provide is provided, realize low power consumption, automatically, the unmanned LNG skid station of telecontrol.
The technological scheme that the present invention takes is: a kind ofly from supercharging, automatically control LNG skid station, comprise that LNG unloads liquid part and filled part, also comprise that LNG storage tank is from supercharging part and corresponding control section, described LNG storage tank from the supercharging of supercharging part by completing as lower pipeline:
1) from LNG tank bottom, draw a pipeline, be connected to the entrance of warm vaporizer, on pipeline, be provided with a mortor operated valve, the pipeline of drawing from described sky temperature vaporizer outlet, set gradually a safety valve and reduction valve, pipeline after described reduction valve is divided into three tunnels: a road turns back to the upper liquid level of described LNG storage tank through another mortor operated valve, another road enters the lower liquid level of described LNG storage tank through another reduction valve, one-way valve, also has the straight-through outlet valve in a road;
2) from described LNG tank top, draw a pipeline, by three-way valve, be connected respectively to two safety valves;
3) from described LNG tank top, also draw a pipeline and be connected to liquid valve, from described LNG tank bottom, also draw a pipeline and be connected to liquid valve, between described upper liquid valve and described lower liquid valve outlet port, be connected with equilibrium valve;
4) from described LNG tank top, also draw a pipeline, by a mortor operated valve again, be connected in LNG cargo tank;
Described control section, comprise PLC system, and be connected with described PLC system each described in mortor operated valve, in order to measure temperature transducer, pressure transducer, liquid level sensor, the flowmeter of LNG storage tank, communication control module, touch screen, safety alarm system, output control part.
Further, on the pipeline of described sky temperature vaporizer entry end, except being provided with mortor operated valve, be also provided with stop valve, when mortor operated valve breaks down, can close manually stop valve.
Described LNG unloads liquid part, comprise be connected with LNG tank car unload liquid access port, and from described two pipelines that unload liquid access port and separate: a road is to access the liquid pipeline that unloads of described LNG tank top by pipeline and top liquid feed valve, and another road is to access the liquid pipeline that unloads of described LNG tank bottom by pipeline and bottom liquid inlet valve.
Described, unload between liquid access port and described top liquid feed valve, and described in unload between liquid access port and described bottom liquid inlet valve, be respectively arranged with stop valve.
Described filled part, refers to from described LNG tank bottom and draws a pipeline, through mortor operated valve, flowmeter, is connected to LNG cargo tank.
Described mortor operated valve has setting at the end that goes out, enters of described flowmeter.
Pipeline after described flowmeter, is divided into two-way: a road is by mortor operated valve, to be linked into the top of described LNG cargo tank; Another road is by mortor operated valve, to be linked into the bottom of described LNG cargo tank.
Described control section is connected with a storage battery, and described storage battery is connected with wind power plant and/or solar power plant.
The present invention compared with prior art has advantages of: the present invention, by liquid feed valve being set in LNG tank top, in the time of can making LNG tank car to LNG storage tank drainage, reduces LNG pressure of storage tank, has reduced the problem of LNG discharge, has also reduced waste; By system, from supercharging mode, realized the LNG skid of low power consumption, low cost, intelligence, for artificial LNG gas station service provides convenience; By PLC control technique, realize the data capture of all the sensors, the centralized control of control unit, be convenient to telecontrol, check and recorded all information of gas station, realized unmanned; By wind power equipment, solar facilities and storage battery, realized the lasting self-powered function at LNG skid station.Driver can be by the mode of swiping the card, self-service aerating, and automatic charging, can, continuously safely for non-transformer area provides refueling service, be convenient to the extensive use of LNG automobile.
Accompanying drawing explanation
Fig. 1 is the structured flowchart from supercharging automatic control LNG skid station of the present invention.
Fig. 2 is the control block diagram from supercharging automatic control LNG skid station of the present invention.
Description of reference numerals: 1, 2, 3, 4, 6, 7, 8, 9, 10-mortor operated valve, 5-stop valve, 11-empty temperature vaporizer, 12, 24, 25-safety valve, 13, 15-reduction valve, 14-unload liquid access port, 16-one-way valve, valve on 17-liquid, valve under 18-liquid, 19-three-way valve, 20-equilibrium valve, 21-pressure transducer, 22-liquid level sensor, 26-wind power plant, 27-solar power plant, 28-storage battery, 29-PLC, 30-LNG cargo tank, 31-LNG storage tank, 32-temperature transducer, 33-flowmeter, 34-communication control module, 35-touch screen, 36-safety alarm system, 37-output control part.
Embodiment
Below, by reference to the accompanying drawings the specific embodiment of the present invention is described.
Figure 1 shows that the structured flowchart of automatically controlling LNG skid station from supercharging of the present invention.From scheming, can find out, skid station comprises that LNG unloads liquid part, LNG storage tank from supercharging part, filled part and control section.
LNG unloads liquid part, is by the top liquid feed valve 2 that unloads liquid access port 14 and LNG storage tank 31, bottom liquid inlet valve 3, by pipeline, connects and composes.Unload liquid and be divided into two-way: a road is by unloading liquid access port 14 by the Xie Ye path, top of pipeline and top liquid feed valve 2 access LNG storage tanks 31; Another road is by the bottom of pipeline and bottom liquid inlet valve 3 access LNG storage tanks 31, to unload liquid path by unloading liquid access port 14.When LNG tank car unloads liquid to LNG storage tank 31, unload liquid access port 14 and inject from LNG tank top by stop valve and top liquid feed valve 2; When storage tank is during lower than certain pressure, unload liquid access port 14 and inject from LNG storage tank 31 bottoms by stop valve and bottom liquid inlet valve 3.
LNG storage tank, from supercharging part, comprises following several pipelines:
1) from LNG storage tank 31 bottoms, draw a pipeline, be connected to the entrance of warm vaporizer 11, on pipeline, be disposed with stop valve 5 and mortor operated valve 1, by LNG storage tank 31 bottoms, by mortor operated valve 1, adjust liquid measure and enter empty temperature vaporizer 11; On the outlet conduit of empty warm vaporizer 11, set gradually safety valve 12 and reduction valve 13, when outlet pressure is too high, liquid gas is vaporized through reduction valve 13.Gas is divided into three tunnels after reduction valve 13: a road turns back to the upper liquid level (being liquid level top) of LNG storage tank 31 through mortor operated valve 4, increase system pressure; Another road enters liquid level under LNG storage tank (being liquid level bottom) through reduction valve 15 and one-way valve 16; Also have the straight-through outlet valve 23 in a road, realize safety relief.
2) pipeline of LNG storage tank 31 Base top contact, by three-way valve 19 connection safety valves 24,25, guaranteeing has a safety valve in running order all the time, makes LNG storage tank 31 in a safe condition.The entrance of three-way valve 19 is connected to the ingress of mortor operated valve 4.
3) pipeline is also drawn at LNG storage tank 31 tops, liquid valve 17 in connection; A pipeline is also drawn in LNG storage tank 31 bottoms, connects lower liquid valve 18; Between upper liquid valve 17 and 18 outlets of lower liquid valve, be connected with equilibrium valve 20.Between upper liquid valve 17 and 18 outlets of lower liquid valve, be also connected with liquid level sensor 22, upper liquid valve 17 outlet ports are connected with pressure transducer 21.
4) pipeline (in the present embodiment, this pipeline is same pipeline with the pipeline that chains liquid valve 17 above) is also drawn at LNG storage tank 31 tops, by mortor operated valve 10, is connected in LNG cargo tank 30.
Above-mentioned, on LNG storage tank 31, be provided with temperature transducer 32, pressure transducer 21 and liquid level sensor 22, complete temperature, pressure and liquid level and detect.
Fill part, comprise the mortor operated valve 6,7,8,9 that connects by pipeline and flowmeter 33, LNG cargo tank 30.In LNG storage tank 31 bottoms, draw a pipeline, pipeline passes through two mortor operated valves 6,7 that are connected in series, and is connected to the entrance of flowmeter 33; The outlet conduit of flowmeter 33 is divided into two-way: the mortor operated valve 8 of leading up to enters into LNG cargo tank 30 tops, and the mortor operated valve 9 of separately leading up to enters into LNG cargo tank 30 bottoms.
Driver swipes the card by card reader, selects LNG charging amount in card reader, and card reader connects PLC29, and PLC control mortor operated valve 6, mortor operated valve 7, flowmeter 33, mortor operated valve 8 are opened, and are filled with LNG cargo tank 30, complete the filled service of LNG.Pressure in cargo tank 30 during lower than certain pressure value, is opened mortor operated valve 9, closes mortor operated valve 8, from cargo tank 30 bottoms, injects.
Figure 2 shows that of the present invention from supercharging automatic control LNG skid station control block diagram.Control section, comprises all mortor operated valves 1,2,3,4,6,7,8,9,10, pressure transducer 21, liquid level sensor 22, temperature transducer 32, wind power plant 26, solar power plant 27, storage battery 28, PLC29, flowmeter 33, communication control module 34, touch screen 35, safety alarm system 36 and output control part 37.
Control section be take PLC29 as core, liquid level sensor 22, pressure transducer 21, temperature transducer 32 send testing signal to PLC29 respectively, PLC29 controls each mortor operated valve 1,2,3,4,6,7,8,9,10 after as calculated automatically, by controlling the open amount of empty temperature vaporizer 11 front end mortor operated valves 1, reach setting pressure, then close mortor operated valve 1; By controlling mortor operated valve 2,3, determine to unload liquid mode; Charging amount by flowmeter 33 feedback LNG cargo tanks 30, reaches and sets after charging amount, closes mortor operated valve 6,7,8,9.Communication control module 34 can be realized remote monitoring, and card reader connects PLC, sends signal to remote monitoring host computer and deducts fees, and record filled details while filling by communication control module 34.When safety alarm system 36 detects LNG leakage, all mortor operated valves that PLC29 emergency cut-off is directly connected with LNG storage tank 31, and send to control room by communication control module 34.Touch screen 35 can display system running state.Output control part 37 is set and is exported PLC29 to for radio-frequency card reader, controls LNG charging amount.
LNG skid station automatic power function, without electrical source of power, all can, to storage battery 28 chargings, for control section provides power supply, be realized by wind power plant 26 and/or solar power plant 27 in LNG skid station.
The present invention is by arranging liquid feed valve in LNG tank top, in the time of can making LNG tank car to LNG storage tank drainage, reduces LNG pressure of storage tank, and the problem of discharge that reduced LNG has also reduced waste; By system, from supercharging mode, realized the LNG skid of low power consumption, low cost, intelligence, for artificial LNG gas station service provides convenience; By PLC control technique, realize the data capture of all the sensors, the centralized control of control unit, be convenient to telecontrol, check and recorded all information of gas station, realized unmanned; By wind power equipment, solar facilities and storage battery, realized the lasting self-powered function at LNG skid station.
Claims (8)
1. from supercharging, automatically control a LNG skid station, comprise that LNG unloads liquid part and filled part, is characterized in that: also comprise that LNG storage tank is from supercharging part and control section, described LNG storage tank from supercharging supercharging partly by completing as lower pipeline:
1) from LNG tank bottom, draw a pipeline, be connected to the entrance of warm vaporizer, on pipeline, be provided with a mortor operated valve, the pipeline of drawing from described sky temperature vaporizer outlet, set gradually a safety valve and reduction valve, pipeline after described reduction valve is divided into three tunnels: a road turns back to the upper liquid level of described LNG storage tank through another mortor operated valve, another road enters the lower liquid level of described LNG storage tank through another reduction valve, one-way valve, also has the straight-through outlet valve in a road;
2) from described LNG tank top, draw a pipeline, by three-way valve, be connected respectively to two safety valves;
3) from described LNG tank top, also draw a pipeline and be connected to liquid valve, from described LNG tank bottom, also draw a pipeline and be connected to liquid valve, between described upper liquid valve and described lower liquid valve outlet port, be connected with equilibrium valve;
4) from described LNG tank top, also draw a pipeline, by a mortor operated valve again, be connected in LNG cargo tank;
Described control section, comprise PLC system, and be connected with described PLC system each described in mortor operated valve, in order to measure temperature transducer, pressure transducer, liquid level sensor, the flowmeter of LNG storage tank, communication control module, touch screen, safety alarm system, output control part.
2. according to claim 1ly from supercharging, automatically control LNG skid station, it is characterized in that: on the pipeline of described sky temperature vaporizer entry end, except being provided with mortor operated valve, be also provided with stop valve, when mortor operated valve breaks down, can close manually stop valve.
3. according to claim 1 and 2ly from supercharging, automatically control LNG skid station, it is characterized in that: described LNG unloads liquid part, comprise be connected with LNG tank car unload liquid access port, and from described two pipelines that unload liquid access port and separate: a road is to access the liquid pipeline that unloads of described LNG tank top by pipeline and top liquid feed valve, and another road is to access the liquid pipeline that unloads of described LNG tank bottom by pipeline and bottom liquid inlet valve.
4. according to claim 3ly from supercharging, automatically control LNG skid station, it is characterized in that: described, unload between liquid access port and described top liquid feed valve, and described in unload between liquid access port and described bottom liquid inlet valve, be respectively arranged with stop valve.
5. according to claim 1ly from supercharging, automatically control LNG skid station, it is characterized in that: described filled part, refer to from described LNG tank bottom and draw a pipeline, through mortor operated valve, flowmeter, be connected to described LNG cargo tank.
6. according to claim 5ly from supercharging, automatically control LNG skid station, it is characterized in that: described mortor operated valve has setting at the end that goes out, enters of described flowmeter.
7. according to automatically controlling LNG skid station from supercharging described in claim 5 or 6, it is characterized in that: the pipeline after described flowmeter, is divided into two-way: a road is by mortor operated valve, to be linked into the top of described LNG cargo tank; Another road is by mortor operated valve, to be linked into the bottom of described LNG cargo tank.
8. according to claim 1ly from supercharging, automatically control LNG skid station, it is characterized in that: described control section is connected with a storage battery, described storage battery is connected with wind power plant and/or solar power plant.
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| CN201410313819.3A CN104033726B (en) | 2014-07-03 | 2014-07-03 | One is controlled LNG skid station automatically from supercharging |
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| CN201410313819.3A CN104033726B (en) | 2014-07-03 | 2014-07-03 | One is controlled LNG skid station automatically from supercharging |
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| CN104033726B CN104033726B (en) | 2016-05-11 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104595713A (en) * | 2014-12-25 | 2015-05-06 | 成都华气厚普机电设备股份有限公司 | System and method for controlling unattended LNG (Liquefied Natural Gas) gas station |
| CN105443982A (en) * | 2015-12-18 | 2016-03-30 | 北京超拓远大石油科技有限公司 | Intelligent LNG gasifying skid with remote monitoring function |
| CN106130153A (en) * | 2016-06-22 | 2016-11-16 | 歌思（天津）低温设备有限公司 | A kind of Dewar flask intelligent ventilating system |
| CN106114760A (en) * | 2016-07-04 | 2016-11-16 | 上海衡拓实业发展有限公司 | Peculiar to vessel automatically control removable LNG fuel tank case and installation method thereof |
| CN107367930A (en) * | 2017-09-14 | 2017-11-21 | 成都天翔环境股份有限公司 | One seed nucleus tank car control system and its application method |
| CN113776318A (en) * | 2021-09-15 | 2021-12-10 | 青岛创客智造机械设备有限公司 | Green energy-saving gas direct-fired drying system |
| CN114659020A (en) * | 2022-03-21 | 2022-06-24 | 烟台杰瑞石油装备技术有限公司 | Liquid nitrogen equipment and control method thereof |
| CN115405854A (en) * | 2022-08-25 | 2022-11-29 | 深圳中广核工程设计有限公司 | Pressure control system and method for liquid nitrogen storage tank and nitrogen distribution pipeline |
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| CN107367930A (en) * | 2017-09-14 | 2017-11-21 | 成都天翔环境股份有限公司 | One seed nucleus tank car control system and its application method |
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| CN113776318A (en) * | 2021-09-15 | 2021-12-10 | 青岛创客智造机械设备有限公司 | Green energy-saving gas direct-fired drying system |
| CN114659020A (en) * | 2022-03-21 | 2022-06-24 | 烟台杰瑞石油装备技术有限公司 | Liquid nitrogen equipment and control method thereof |
| CN114659020B (en) * | 2022-03-21 | 2023-08-25 | 烟台杰瑞石油装备技术有限公司 | Liquid nitrogen equipment and control method thereof |
| CN115405854A (en) * | 2022-08-25 | 2022-11-29 | 深圳中广核工程设计有限公司 | Pressure control system and method for liquid nitrogen storage tank and nitrogen distribution pipeline |
| CN115405854B (en) * | 2022-08-25 | 2024-05-10 | 深圳中广核工程设计有限公司 | System and method for controlling pressure of liquid nitrogen storage tank and nitrogen distribution pipeline |
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| CN104033726B (en) | 2016-05-11 |
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Inventor after: Tao Xiaohui Inventor after: Guan Jinqiang Inventor before: Tao Xiaohui Inventor before: Yang Rui |